CN101242917B

CN101242917B - Two-piece can, manufacturing method therefor

Info

Publication number: CN101242917B
Application number: CN2006800294916A
Authority: CN
Inventors: 小岛克己; 西原友佳; 久保启; 安江良彦; 大岛安秀; 岩佐浩树
Original assignee: NKK Corp
Current assignee: JFE Steel Corp; JFE Engineering Corp
Priority date: 2005-08-12
Filing date: 2006-08-10
Publication date: 2011-05-18
Anticipated expiration: 2026-08-10
Also published as: CN101242917A; JP2007045507A; JP4670543B2

Abstract

A two-piece can that is satisfactory in can body strength, excelling in corrosion resistance; and a method of shaping for easily producing of such a two-piece can without cracking. There is provided a method of shaping, comprising forming a dome portion in a bottom part of can barrel drawing wrought into a bottomed cylindrical configuration; performing trimming work of an opening portion of the can barrel; performing a diameter reducing work such that the opening portion has a diameter smaller than that of the can barrel and satisfying the following formulae (1) and (2); and forming a bead part at edge portion of the opening of the can barrel to thereby obtain a two-piece can. The processing of this method includes a heat treatment step in which an employed laminated steel sheet is heated to a temperature not lower than the glass transition temperature of the film of the laminated steel sheet but not higher than the melting point thereof plus 30 DEG C and thereafter is rapidly cooled to a temperature not higher than the glass transition temperature within a period of 30 sec. The formulae are 1.5<=h/(R-r)...(1) and d/R<=0.25...(2), wherein h: height from can bottom to apex edge of opening, R: circular blank position radius, r: radius of bottom part, and d: radius of apex edge of opening.

Description

Seamless tin and manufacture method thereof

Technical field

The present invention for example relates to as the seamless tin of aerosol with the container of canister etc., various sprayers etc.

Background technology

For example, in the field of aerosol, built-up tin and seamless tin are arranged roughly with canister.The structure of built-up tin for rectangular flat plate is bonded into be equipped with on the tank body cylindraceous jar at the bottom of and cover (dome) because component parts is made of 3 elements, thereby be known as this title.When being used in the spraying purposes, on dome so install fixed cap with injection valve (below, be called in the present invention under the situation of fixed cap and be considered as having injection valve), component parts is 4 elements under the situation of fixed cap comprising, but owing in beverage can, food cans, will have the structure that is bonded into tank body cylindraceous and extensively be called built-up tin, thereby also imitate it and the jar of said structure is called built-up tin in the present invention.

On the other hand, in the seamless tin, make the open end side undergauge of the tank body that is configured as round-ended cylinder and fixed cap is installed.Composed component is 1 of a tank body when removing fixed cap in the spraying purposes, thereby tank body itself is known as monolithic jar, whole jar sometimes, but, thereby also imitate it and the tank body of this structure is called seamless tin in the present invention because the structure that will have the tank body that is configured as round-ended cylinder in beverage can, food cans extensively is called seamless tin.Because seamless tin is the tank body that does not have seam, carry out undergauge processing etc. towards fixed cap with the continuous shape of smoothness from tank body, thereby the aesthetics of comparing its outward appearance of built-up tin is better.Therefore, the purposes pay attention to packaging external appearance from product characteristics for example in the purposes of aromatic, antiperspirant, hair cosmetic agent etc., is extensive use of seamless tin.

As the raw material that in built-up tin and seamless tin, use, in built-up tin, be steel plate generally, in seamless tin aluminium.This be because, because the aluminum ratio steel plate is soft, thereby under the situation of aluminium than being easier to carry out following processing: adopt the drawing and forming of impact forging, pull and stretch-again, pull and stretch-drawing and forming-methods such as attenuate drawing and forming are formed with the tank body of round-ended cylinder again, and open end carried out undergauge and is processed into the shape of the aerosol can of regulation in the non-patent literature 1.The more important thing is,, thereby produce rust outside with respect to the corrosion resistance of content, when aerosol can places moist environment and be difficult to be a problem because it is better to compare the corrosion resistance of steel plate, aluminium.With respect to this, steel plate then intensity is high and cheap.Therefore, under the situation of the aerosol can that is used for the higher compressive resistance of needs, can make the tank body thickness of slab thinner when having sufficient tank intensity, have the advantage that can reduce former material expense.From above viewpoint, attempt using the steel plate that improves corrosion resistance to obtain two aerosol cans.

For example, as using the steel plate that improves corrosion resistance to obtain the method for two aerosol cans, the method that improves the corrosion resistance of steel plate itself is disclosed in patent documentation 1, the method that covers surface of steel plate with the higher metal of corrosion resistance is disclosed in patent documentation 2, in patent documentation 3, disclose with filming and covered the method for surface of steel plate, in patent documentation 4 and 5, disclose the method that covers surface of steel plate with film.

Patent documentation 1: Japanese Unexamined Patent Application Publication 2003-500306 communique

Patent documentation 2: Japanese kokai publication sho 63-168238 communique

Patent documentation 3: Japanese kokai publication hei 9-39975 communique

Patent documentation 4: Japanese kokai publication hei 1-228567 communique

Patent documentation 5: Japanese kokai publication hei 10-24973 communique

Non-patent literature 1:Federation of European Aerosol Association StandardNo.215, No.219, No.220

In patent documentation 1, disclose steel plate itself has been made as the higher stainless technology of corrosion resistance as the method for the corrosion resistance that improves steel plate itself.But,, thereby cause the rising of jar cost in this method though stainless steel excellent corrosion resistance price is high.

In the metal higher with corrosion resistance covers the patent documentation 2 of surface of steel plate following technology being disclosed: by using aludip, avoids carrying out the rust of pot bottom of two aerosol cans of attenuate pull and stretch processing.According to this method, might avoid rust for the lower pot bottom of degree of finish.But the aluminium coat that carries out the tank body portion of attenuate pull and stretch processing might damaged and produce rust.

As in the patent documentation 3 of the method that covers surface of steel plate with filming, disclosing and having had the relevant technology of inner surface coating metal container that the polyamideimides that is cured is filmed.Former material when this technology is mentioned as use in two aerosol cans can use steel plate, but the embodiment relevant with steel plate only relates to the lower built-up tin of degree of finish, not record fully of corrosion resistance when steel plate being processed into the higher seamless tin of degree of finish, effect is not clear.And following record is arranged in specification: this technology both can be implemented on the tank body after the shaping, processed after implementing on also can the metallic plate before shaping.But situation about using in the seamless tin of Biao Shi use aluminium is filmed though form behind for example clear formation tank body in an embodiment, does not specify and forms the back of filming on the metallic plate before shaping to its embodiment that processes.Thus, the result that the inventor etc. study thinks, will film the steel plate that covers when being processed into two aerosol cans of high degree of finish by thermosetting, exists because of processing to produce the problem that damage is difficult to obtain sufficient corrosion resistance on filming.

From the viewpoint of corrosion resistance, preferably cover the method for surface of steel plate with film.Following technology is disclosed in patent documentation 4: use lamination the steel plate of two extension films of PETG obtain aerosol can.According to this technology, owing to the tank body that covers with undamaged laminated film after pull and stretch is processed, thereby excellent corrosion resistance.But, use that the tank body that obtained by this technology keeps corrosion resistance be the peristome of tank body as shown in the Examples not by the lower situation of the degree of finish of undergauge, the corrosion resistance when reckoning without the jar that is applied to be machined to by the aerosol can shape of non-patent literature regulation.

The relevant technology of aerosol can of carrying out pull and stretch processing with steel plate to the lamination laminated film is disclosed in patent documentation 5, this laminated film, the vistanex by sour modification at the two sides of permalon layer lamination the acrylic resin layer.In this technology, because the steel plate of film that used lamination, thereby can think the tank body that can access excellent corrosion resistance.But, for the pull and stretch method for processing in an embodiment only record obtain the aerosol can of 45mm diameter * 120mm height shape, do not put down in writing concrete processing method, particularly the corrosion resistance of carrying out behind the undergauge for the open end to tank body is not mentioned.

In above-mentioned technology, shown in patent documentation 4 and 5 with the laminate steel of mulch-laying machine resin film as jar former material the time favourable aspect the corrosion resistance.But, studies show that inventor etc. it is not enough only using the laminate steel of prior art in order to obtain two aerosol cans.

Specifically, when forming two aerosol cans of non-patent literature 1 specified standard shape, owing to need form laminate steel with very high degree of finish, thereby follow to be formed in to produce on the laminate steel and peel off, the result can not keep sufficient corrosion resistance.

Summary of the invention

The present invention In view of the foregoing, its purpose is to use high strength, price is cheaper and the laminate steel of excellent corrosion resistance obtains tank intensity fully and the seamless tin of excellent corrosion resistance, and the manufacturing process that does not produce peeling off of laminated film and can make seamless tin easily is provided.

The result who studies in order to address the above problem, the present invention finishes by having following feature.At first, by use high strength, price is cheaper and the laminate steel of excellent corrosion resistance as the former material of two aerosol cans, make the tank intensity of seamless tin abundant, and make with low cost.Follow man-hour peeling off of laminated film to wait and the deterioration of the corrosion resistance that produces for preventing from steel plate added as the former material of seamless tin, find with open end with by the state of Drawing Die and Wrinkle-resisting unit clamping not formation slidably be effective.Specifically, method as the damage of the laminate steel of the open end of avoiding tank body, in final pull and stretch first being processed, the tapered portion in that the open front formation of tank body portion is extended to the tank body radial direction outside then is machined to the diameter identical with tank diameter with the tapered portion undergauge.

The present invention makes according to above opinion, and its main idea is as follows:

1. one kind with the manufacturing process of laminate steel as the seamless tin of former material, wherein, comprises following operation:

Laminate steel is carried out the operation of stamping-out;

The circular blank that this laminate steel of stamping-out is obtained carries out repeatedly the operation that pull and stretch is processed the tank body that is formed with the round-ended cylinder shape;

At the jar private side of pot bottom, form the operation of the dome portion of concave shape;

To the peristome of this tank body cut edge processing operation;

After this side cut manufacturing procedure, to this peristome of this tank body with less than the diameter of this tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2); With

After the processing of this undergauge, form protruding circle portion and obtain the operation of seamless tin at this open end of this tank body,

Here, at least one operation in the above-mentioned operation comprises the operation that this laminate steel is heat-treated; And here, this heat treatment step comprises following processing: after this laminate steel being heated to the temperature below above and fusing point+30 of the glass transition point of film of this laminate steel ℃, 30 seconds with interior this temperature below glass transition point that is cooled to rapidly,

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

Wherein, h: from the bottom of the jar to height, the R of open front portion: circular blank position radius, r: bottom radius, d: the radius of open front portion.

2. one kind with the manufacturing process of laminate steel as the seamless tin of former material, wherein, comprises following operation:

Laminate steel is carried out the operation of stamping-out;

The circular blank of this laminate steel that this laminate steel of stamping-out is obtained carries out repeatedly the operation that pull and stretch is processed the tank body that is formed with the round-ended cylinder shape;

To the peristome of this tank body cut edge processing operation;

After this side cut manufacturing procedure, to the peristome of this tank body with less than the diameter of this tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2); With

After this undergauge manufacturing procedure, form protruding circle portion at this open end of this tank body and obtain the operation of seamless tin,

Here, at least one operation in the above-mentioned operation comprises the operation that this laminate steel is heat-treated; And, here, this heat treatment step comprises following processing: be the stage of 0.2≤d/R≤0.5,1.5≤h/ (R-r)≤2.5 at degree of finish, this laminate steel is heated to more than the glass transition point of film of this laminate steel and the temperature below fusing point+30 ℃ after, at 30 seconds with interior this temperature below glass transition point that is cooled to rapidly

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

3. the manufacturing process of each described seamless tin as in 1 or 2 wherein, also comprises being used for forming the side cut manufacturing procedure of new open end at this peristome of this tank body after this undergauge processing of this peristome of this tank body.

4. as the manufacturing process of each described seamless tin in 1,2, wherein, this laminate steel is the steel plate that covers mylar.

5. as the manufacturing process of 4 described seamless tins, wherein, this mylar, polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with in ethylene glycol, the butanediol at least one as principal component.

6. as the manufacturing process of 5 described seamless tins, wherein, cover the organic resin on the laminate steel, with mylar as principal phase, parafacies contain immiscible and Tg at the resin below 5 ℃.(annotating: will under the situation of heating polymer substance, be called glass transition, its temperature is called glass transition point (temperature) Tg) from glassy harder state variation to elastomeric phenomenon

7. as the manufacturing process of 6 described seamless tins, wherein, this resin that contains as parafacies is selected from following at least a:

Polyethylene, its sour modifier or its ionomer,

Polypropylene, its sour modifier or its ionomer.

8. a seamless tin is shaped by each the described manufacturing process in 1 to 7.

9. laminate steel, it is the seamless tin laminate steel that uses in the manufacturing process of each the described seamless tin in 1 to 7, here, this seamless tin laminate steel is the laminate steel of mulch-laying machine resin film.

10. one kind with the manufacturing process of laminate steel as the seamless tin of former material, wherein, comprises following operation:

Laminate steel is carried out the operation of stamping-out;

This open front in this tank body portion, the operation of the tapered portion that formation is stretched out outside the radial direction of this tank body;

This tapered portion undergauge is machined to the operation of the diameter identical with this tank diameter; With

To this open side of this tank body with less than the diameter of this tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2),

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

11. as the manufacturing process of 10 described seamless tins, wherein, also comprise be used for before the undergauge manufacturing procedure of this tapered portion, any one stage at least after the undergauge manufacturing procedure forms new open end on this tapered portion side cut manufacturing procedure.

12. as the manufacturing process of each described seamless tin in 10 or 11, wherein, also comprise being used for after this undergauge manufacturing procedure of this tank body open side, forming the side cut manufacturing procedure of new open end in the open side of this tank body.

13. as the manufacturing process of 10 described seamless tins, wherein, this laminate steel is the steel plate that covers mylar.

14. as the manufacturing process of 13 described seamless tins, wherein, this mylar is that the polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with ethylene glycol and/or butanediol as principal component.

15. as the manufacturing process of 14 described seamless tins, wherein, cover the organic resin on the laminate steel, with mylar as principal phase, parafacies contain immiscible and Tg at the resin below 5 ℃.

16. as the manufacturing process of 15 described seamless tins, wherein, this resin that contains as parafacies is selected from following at least a:

Polyethylene, its sour modifier or its ionomer,

Polypropylene, its sour modifier or its ionomer.

17. a seamless tin is shaped by each the described manufacturing process in 10 to 16.

18. the laminate steel of a mulch-laying machine resin film uses in the manufacturing process of each the described seamless tin in 10 to 16.

19. as each the described manufacturing process in 1,2,10, wherein, the manufacturing process of the seamless tin of this laminate steel except deep drawing processing, also comprises the processing method of carrying out the processing of attenuate pull and stretch.

20. as each the described manufacturing process in 1,2,10, wherein, the number of drawing when forming the seamless tin of this laminate steel is preferably below 10 times.

21. as each described manufacturing process in 1,2,10, wherein, the perfect reduction of area when forming the seamless tin of this laminate steel, preferably, is more than 0.4 carried out the first time by circular blank during pull and stretch, is more than 0.5 in pull and stretch afterwards (pull and stretch again) processing.

22. as each the described manufacturing process in 1,2,10, wherein, establish that this laminate steel is carried out the average thickness of slab that pull and stretch adds the side wall portion thickness of slab integral body of this tank body in man-hour is that t, former thickness of slab are t ₀The time, average thickness of slab rate of change is preferably 0.5＜t/t ₀＜1.5 scope.

23. as each described manufacturing process in 1,2,10, wherein, degree of finish when this openend that seamless tin had of this laminate steel is carried out undergauge is preferably d/r＞0.3 with respect to the radius r of tank body, the radius d of openend behind the undergauge, and then is preferably d/r＞0.4.

24. as each the described manufacturing process in 1,2,10, wherein,, comprise at least a in following as the steel plate of the substrate of laminate steel:

(1) using the C amount is the mild steel of 0.01～0.10% degree, the steel plate that carries out recrystallization annealing by coffin annealing;

(2) using the C amount is the mild steel of 0.01～0.10% degree, the steel plate that carries out recrystallization annealing by continuous annealing;

(3) using the C amount is the mild steel of 0.01～0.10% degree, carries out the steel plate of recrystallization annealing and overaging processing by continuous annealing;

(4) using the C amount is the mild steel of 0.01～0.10% degree, carry out recrystallization annealing by coffin annealing or continuous annealing after, carry out the steel plate of secondary cold-rolling (after the annealing cold rolling);

(5) use the IF steel (Interstitial free steel) that in the C amount is roughly the ultra-low carbon steel of 0.003% following degree, adds solid solution C fixed element, the steel plate that carries out recrystallization annealing by continuous annealing.

25. as the manufacturing process of each described seamless tin in 1,2,10, wherein, it is curl at least a processing method in (die curling) mode, spinning (spinning) mode of mould that this laminate steel is carried out the undergauge method for processing.

Description of drawings

Fig. 1 is the figure of the manufacturing process of expression seamless tin of the present invention.(undergauge is machined to the processing of cutting edge behind the following diameter of the diameter of cylinder)

Fig. 2 is the figure of the manufacturing process of expression seamless tin of the present invention.(undergauge has the processing of side cut after being machined to the following diameter of the diameter of cylinder)

Fig. 3 is the figure of the relation of expression tank body size of the present invention.

Fig. 4 is another figure of the manufacturing process of expression seamless tin of the present invention.(undergauge is machined to the processing of cutting edge behind the following diameter of the diameter of cylinder)

The specific embodiment

Below seamless tin of the present invention and manufacturing process thereof and steel for seamless tin plate are elaborated.

At first, the laminate steel that is used as former material is in the present invention described.

The objective of the invention is to, obtain having sufficient corrosion resistance, as the intensity of tank body, and cheap seamless tin.Therefore, be the laminate steel that covers the organic resin film of machinability, excellent corrosion resistance in order to reach above-mentioned purpose, establish the former material that is used for seamless tin shaping of the present invention.

Steel plate as the substrate of the laminate steel that uses in the present invention as long as can be configured as target shape, does not just limit its kind, preferred following compositions, manufacture method especially.

(1) using the C amount is the mild steel of 0.01～0.10% degree, carries out recrystallization annealing by coffin annealing.

(2) using the C amount is the mild steel of 0.01～0.10% degree, carries out recrystallization annealing by continuous annealing.

(3) using the C amount is the mild steel of 0.01～0.10% degree, carries out recrystallization annealing and overaging processing by continuous annealing.

(4) using the C amount is the mild steel of 0.01～0.10% degree, carry out recrystallization annealing by coffin annealing or continuous annealing after, carry out secondary cold-rolling (after the annealing cold rolling).

(5) use the IF steel (Interstitial free steel, gapless atomic steel) that roughly in the ultra-low carbon steel of 0.003% following degree, adds powerful solid solution C fixed element such as Nb, Ti in the C amount, carry out recrystallization annealing by continuous annealing.The mechanical property of steel plate, so long as can be configured as just not special provision of target shape, but in order not damage machinability and to keep sufficient tank intensity, preferably use yield strength YP more than 220MPa, the steel plate of the following degree of 580MPa.And preferred more than 0.8 for the r value as plastic anisotropy's index, the absolute value of the intra-face anisotropy Δ r of preferred plastic anisotropy r value is below 0.7.The thickness of slab of steel plate can suitably be set by target jar shape, necessary tank intensity.From the viewpoint that the cost that suppresses steel plate itself and tank body rises, the preferred roughly steel plate of 0.15～0.4mm degree that uses.

Above-mentioned steel plate preferably uses and implements various surface-treated surface treated steel plates on the surface.It is the most suitable by surface treated steel plate (so-called TFS) of two layers of tunicle that crome metal constitutes, the upper strata is made of chromium hydroxide etc. particularly to form lower floor.For the metallic chromium layer of TFS, the adhesion amount of chromium hydroxide layer,, all convert the preferred 70～200mg/m of metallic chromium layer in Cr though do not limit especially ²Scope, the preferred 10～30mg/cm of chromium hydroxide layer ²Scope.

And, as described below for the organic resin film that covers on the steel plate.

As the organic resin film that constitutes the laminate steel that uses in the present invention,, be preferably as follows film from get rid of the purpose of the possibility of processing the film damage that causes as far as possible.

For example, owing to the balance of elongation property necessary in the polyester processing and strength characteristics is good, thereby as the organic resin preferred polyester.Preferably, as this mylar, the polycondensation by dicarboxylic acids composition and diol component obtains, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with ethylene glycol and/or butanediol as principal component.And, as the dicarboxylic acids composition with the situation of terephthalic acids as principal component under, can also comprise the isophthalic acid composition as other copolymer compositions.Diol component under the situation as principal component, can also comprise diethylene glycol, cyclohexanediol as other copolymer compositions with ethylene glycol and/or butanediol.And, with this mylar as principal phase, parafacies can use immiscible and Tg at the resin below 5 ℃.Preferably select more than at least a in polyethylene, polypropylene and/or its sour modifier or the ionomer as the parafacies of this moment.

In addition, in the application's enforcement, add additives such as pigment, lubricant, stabilizing agent during the resin that can stipulate is in this application formed and use, also the resin bed with other functions can be configured in upper strata or intermediate layer beyond Gui Ding the resin bed in this application.

And, method to the steel plate lamination does not limit especially, suitably select to make two extension films or do not have the direct extrusion moldings that on steel plate, form resin bed such as the deposited hot smelting and coating process of extension film hot melt, use T mould etc., confirmed that arbitrary method can both obtain effect of sufficient.

Seamless tin of the present invention is characterized in that, is shaped via following operation: above-mentioned laminate steel as former material, is carried out repeatedly the operation of pull and stretch processing with the tank body that is formed with the round-ended cylinder shape to circular blank; Form the operation of the tapered portion of stretching out to the tank body radial direction outside in tank body portion open front; Above-mentioned tapered portion undergauge is machined to operation till the diameter identical with tank diameter; With to the peristome of above-mentioned tank body with less than the diameter of tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2).Particularly carry out in the present invention forming tapered portion in the process of pull and stretch processing, and above-mentioned tapered portion undergauge is machined to diameter less than tank diameter.

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

Below, its manufacturing process is elaborated.

For with laminate steel as former material, be formed with the tank body of round-ended cylinder shape, preferably circular blank is used repeatedly pull and stretch processing and the method for the height that obtains stipulating.Can suitably select repeatedly number of drawing, perfect reduction of area in the pull and stretch processing.Preferably process for the simplification of forming process, need lower perfect reduction of area but then for this reason, promptly need strict processing with less number of drawing.For the simplification of forming process, preferred number of drawing below 10 times.Perfect reduction of area is preferably more than 0.4 during pull and stretch being undertaken by circular blank the first time, is preferably more than 0.5 in pull and stretch afterwards (pull and stretch again) processing.

In the pull and stretch processing in the present invention, the repeatedly basic processing of pull and stretch processing conduct, but can also adopt the pull and stretch-attenuate pull and stretch method for processing of further adding the processing of attenuate pull and stretch.And, in the processing of pull and stretch repeatedly, can adopt the bending that under the state of giving rear tension force by wrinkle resistant pressure, utilizes Drawing Die shoulder place, crookedly recover thin-walled property pull and stretch processing that distortion realizes that thickness of slab reduces and to it and with the thin-walled property pull and stretch-methods such as attenuate pull and stretch processing of attenuate pull and stretch processing.(annotate: will become thinner darker product in order to make the drum formed body that obtains in deep drawing processing, the processing that the sidewall of non-deep drawing formed body is carried out diameter reducing extrusion towards short transverse is called the processing of attenuate pull and stretch.Also claim ironing.)

And lubricating condition exerts an influence in the pull and stretch processing.Laminate steel, because the film softness and the surface smoothing that are covered, thereby itself have the function that improves lubricity.Therefore, carry out pull and stretch and add and to make with lubricator especially man-hour, but preferably make with lubricator in that the situation that reduces perfect reduction of area is inferior.The kind of lubricant can suitably be selected.

And, follow pull and stretch processing, the side wall portion thickness of slab of tank body changes with respect to former thickness of slab.Thickness of slab is being changed average thickness of slab t and the former thickness of slab t that utilizes on whole jar high ₀Be expressed as average thickness of slab rate of change t/t ₀Situation under, in the processing of the pull and stretch of pull and stretch-again, t/t is arranged ₀＞1 trend becomes t/t in pull and stretch-attenuate pull and stretch processing, the processing of thin-walled property pull and stretch, thin-walled property pull and stretch-attenuate pull and stretch processing etc. ₀＜1.When considering to follow the damage of laminate steel of processing, average thickness of slab rate of change is preferably 0.5＜t/t ₀＜1.5 scope.

According to above-mentioned laminate steel is formed seamless tin as former material, below for other manufacturing process, describe according to each mode.

(first mode)

(forming the operation of dome portion at the jar private side of pot bottom)

Be used as under the situation of aerosol can at seamless tin, require 15kgf/cm in order to fill propellant the manner ²Above compressive resistance.Rise with respect to the jar pressure inside, will be careful pot bottom especially.The pressure that the tank interior of round-ended cylinder is arranged has the edge with the stress of tank body to the direction of circumferencial direction expansion with respect to the sidewall effect of tank body portion.But the tank body parts are processed abundant work hardening because of pull and stretch, can not be out of shape because of the effect that interior pressure causes.On the other hand, pot bottom since pressure effect under the state that the outer edge is retrained by tank body, being subjected to thereby be out of shape towards the jar outer side under the interior pressure condition with higher.Therefore, in order to press the distortion at the jar end that causes in suppressing, in the manner, form the dome portion of concave shape at the jar private side of pot bottom.By so forming dome portion at pot bottom, can increase the thickness of slab of pot bottom, improve the intensity of parts.

(open side of tank body portion being carried out the operation of undergauge processing)

For example, because the peristome at tank body installs and fixes lid in aerosol can, thereby need be with the peristome undergauge to the diameter less than drum diameter.The undergauge degree of finish of this moment can adopt the degree of finish that obtains installing and fixing specified diameter required when covering, but from get rid of the viewpoint of film damage as far as possible, with respect to the radius r of tank body, the radius d of openend behind the undergauge, preferred d/R＞0.3, and then preferred d/R＞0.4.As the undergauge method for processing, can adopt mould neck (die neck) mode of carrying out undergauge at butt open end on the mould of inner face taper, throw is pressed in towards tank body radial direction inboard on the tank body open end and carries out the methods such as rotation neck mode of undergauge.From get rid of the viewpoint of film damage as far as possible, mould neck mode is fit to.In mould neck mode, preferably to the stage is carried out method for processing several times during the radius d behind the extremely final undergauge of the radius r of tank body.At this moment, the danger that produces wrinkle when each degree of finish is big in undergauge processing improves, thereby diameter reducing rate (diameter before the diameter after the undergauge processing/undergauge processing) is preferably more than 0.9.Laminate steel, because the film softness and the surface smoothing that are covered, thereby itself have the function that improves lubricity.Therefore, carry out undergauge and add and to make with lubricator especially man-hour, but the viewpoint of the film damage that causes from the slip of getting rid of with instrument as far as possible preferably makes with lubricator.The kind of lubricant can suitably be selected.

In addition, here, must make degree of finish after the undergauge processing satisfy following formula (1) and (2) and be shaped.

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

At first, to height h, bottom radius r till open end, circular blank position radius R, establish 1.5≤h/ (R-r).The relation of representing the tank body size at Fig. 3.In Fig. 3, label 1 is a circular blank, and label 2 is tank bodies.H, R, d, r are as described above.Wherein, R ' is the initial circular blank radius before cutting edge.

In addition, add man-hour by carrying out pull and stretch processing at actual pull and stretch than the circular blank of the big initial blank radius R ' of circular blank position radius R of regulation in this application.Parts between the R to R ' can be removed by the processing of cutting edge.Here, h/ (R-r) is the index of the laminate steel of expression shaping front and back to the average percentage elongation of the high operation of jar.

Then, for radius d, the circular blank position radius R of open front portion, establish d/R≤0.25.This is the index of the laminate steel of the shaping front and back in the expression open front portion to the contraction of jar circumferencial direction.

As mentioned above, for laminate steel as former material, be formed with the tank body of round-ended cylinder shape, circular blank is used repeatedly pull and stretch processing and the method for the height that obtains stipulating is suitable for.At this moment, in order to obtain shape, and, consider that establishing average thickness of slab rate of change is 0.5＜t/t for fear of the damage of the laminate steel of following processing at the aerosol can of non-patent literature 1 record ₀During＜1.5 scope, need make 1.5≤h/ (R-r) and d/R≤0.25.

(operation of the processing of before undergauge processing or before and after it, cutting edge)

In the manner, preferably, before the undergauge manufacturing procedure of above-mentioned tank body peristome or before and after it, carry out forming the side cut processing of new open end at the peristome of above-mentioned tank body.By before undergauge or its processing of cutting edge in front and back, danger that can and then avoid film to peel off.Open end after the pull and stretch processing is the degree of finish height not only, and because the slip that causes of processing etc. and the close property of film reduces, and physically become the state that part is exposed of being close between film and the surface of steel plate, become the highest part of danger that film is peeled off.Therefore, can before carrying out undergauge processing, cut edge and remove and reduce the danger that film is peeled off this end.On the other hand because undergauge processing itself still improves the processing of the danger that the film of open end peels off, thereby the processing of can after undergauge processing, cutting edge come so that reduce after the danger peeled off of film in the processing.All cutting edge before and after undergauge processing adds man-hour, becomes more good state.In addition, as the side cut method for processing, can adopt method of cutting edge etc. by the inner edge (insertion tank interior) and the sharp discoid outside of edge part of the filled circles tubular of mutual rotation.Wherein, Fig. 2 is the figure that the expression undergauge is machined to the manufacturing process of the seamless tin of the present invention that having behind the following diameter of drum diameter cuts edge adds man-hour.And Fig. 4 is another figure that the expression undergauge is machined to the manufacturing process of the seamless tin of the present invention that adds man-hour less than cutting edge behind the following diameter of drum diameter.Here, dotted line is represented the horizontal line of cutting edge.Identical with reference to label at Fig. 1 and Fig. 2.

(forming the operation of protruding circle portion)

Be used under the situation of aerosol can, owing to install and fix lid (having the injection valve that is used to spray an amount of content), thereby forming the protruding circle portion that conduct is used for installing and fixing at open end the structure of lid at open end.The shape of protruding circle portion, formation method do not limit especially.So long as fixed cap can be nested on the tank body and fix, the shape that can give full play to as the function of protruding circle portion gets final product.

According to the above-mentioned seamless tin that obtains the manner, also can heat-treat in the manufacturing procedure of the following stated as required, other processing midway.

(manufacturing procedure heat treatment step midway)

In the manner, for so that reduce the danger of film damage and implement heat treatment.Specifically, at degree of finish is the stage of 0.2≤d/R≤0.5,1.5≤h/ (R-r)≤2.5, the glass transition point of film that is heated to laminate steel is above, after the temperature below fusing point+30 ℃, at 30 seconds with the interior temperature that is cooled to rapidly below the glass transition point.This is the feature of the manner and is important key element.That is, by be heated to more than the glass transition point, temperature below fusing point+30 ℃, relax the stress of following processing to be applied to the strain on the film, reduce the danger that the film in the processing is thereafter peeled off.As the minimum temperature that internal stress can relax, set glass transition point.Because promote crystallization during not enough glass transition point, machinability thereafter worsens, thereby not preferred.For the reason of setting heat treated timing as described above, lower limit is considered production efficiency and is determined.That is, be the lower stage at the internal stress of the stage of not enough lower limit savings in film, heat treated effect step-down.Therefore, even heat-treat, also put aside internal stress sometimes and cause film to be peeled off because of processing thereafter in the stage of not enough lower limit.On the contrary, surpass the heat treatment in the stage of higher limit, owing to may be the heat treatment that has produced after peeling off, slower as heat treated timing, be difficult for the performance effect.Particularly exist under the situation with the naked eye be difficult to the small stripping portion seen, even heat-treat, sometimes also after operation in generation with this part peeling off as starting point.Therefore, must heat-treat with the degree of finish below the higher limit.Therefore, the upper limit of heat treatment temperature is considered the deterioration that the thermal decomposition of resin causes and is made as fusing point+30 ℃, preferred+20 ℃ scope.If this scope, the resin that thermal decomposition causes worsens unquestionable.And then preferably, with respect to the polyester film in the application regulation be more than 150 ℃, below fusing point+20 ℃.Using as the resin on the laminate steel that covers the manner under the situation of mylar, the lower limit of preferred heat treatment temperature is 150 ℃.This is the lower limit that can carry out the temperature of short time processing with respect to the mitigation of internal stress.That is, when glass transition point is above, can relax internal stress, handle but can carry out the short time in time more than 150 ℃.And, by at 30 seconds after the above-mentioned firm heating with interior and then relaxed internal stress with the temperature below the interior glass transition point that is cooled to film rapidly in preferred 10 seconds.Resin promotes crystallization in the temperature more than the glass transition point, below the fusing point, and processability worsens thereupon.Therefore, need to be cooled to rapidly below the glass transition point at short notice, adopt above-mentioned operation.For heat-treating methods,, confirm to obtain identical effect by electric furnace, gas burner, infra-red furnace, induction heater etc. though do not limit especially.And though firing rate, suitably select to get final product according to effect heat time heating time, firing rate is fast more effective more, and the target of heat time heating time is 15 seconds to 60 seconds degree.But, being not limited to this scope, can suitably select according to effect.

By on can obtain the seamless tin of the manner, also can carry out the manufacturing procedure of the following stated as required.

(the formation operation of tapered portion and undergauge manufacturing procedure)

Circular blank is carried out drawing and forming and when being formed with the tank body of round-ended cylinder, produces the phenomenon that laminated film is peeled off at open end sometimes.Think that its reason is, because the diameter certain mode on short transverse with cylinder is shaped, thereby open end is not all the time to be shaped slidably by the state of Drawing Die and Wrinkle-resisting unit clamping, because the easy damaged of film of surface of steel plate, and in process, acted on wrinkle resistant pressure all the time, thereby on steel plate and film, acted on the power that the high direction of jar is arranged and the degree of finish that increases jar high direction at open end.In order to address this problem, preferably, the tapered portion in that the open front formation of tank body portion is stretched out to the tank body radial direction outside then, is machined to the diameter identical with tank diameter with the tapered portion undergauge, is configured as to make tank diameter certain on short transverse.Thus, can make open end not formed slidably by till final pull and stretch processing, carrying out the formation and the undergauge processing of tapered portion by the state of Drawing Die and Wrinkle-resisting unit clamping.

In addition, be not limited to the situation that the tank body material uses laminate steel, also be applicable to the situation of using other former materials at the manufacturing process of the manner.

(embodiment 1-1)

Fig. 1 is the figure of manufacturing process of the seamless tin aerosol can of expression the manner.In Fig. 1, label 1 expression circular blank, label 2 expression tank bodies, label 4 expression dome shape portions, the protruding circle of label 5 expressions portion.And A is pull and stretch processing and thin drawing sequence, and B is a pull and stretch manufacturing procedure of following tapered portion to form, C is a pot bottom dome manufacturing procedure, D is the side cut manufacturing procedure, and E is the undergauge manufacturing procedure of tapered portion, and F is that undergauge is machined to the undergauge manufacturing procedure less than the diameter of tank diameter.And, the detailed conditions of drawing sequence is as shown in table 1, undergauge is machined to less than the undergauge manufacturing procedure detailed conditions of the diameter of tank diameter as shown in table 2, carries out aerosol can as shown in table 3 along the average stretching of jar high direction, the contraction along jar circumferencial direction of laminate steel before and after the shaping in the open front portion of undergauge processing.And heat treated condition is as shown in table 4.

Table 1

Pull and stretch progression	Perfect reduction of area	r/R?	h/(R-r)
				1?	0.55?	0.59?	1.35?
2?	0.80?	0.47?	1.53?
				3?	0.83?	0.39?	1.78?
4?	0.83?	0.32?	1.76?
				5?	0.83?	0.27?	1.89?

Table 2

Processing progression	Diameter reducing rate
		1?	0.960?
2?	0.957?
		3?	0.960?
4?	0.958?
		5?	0.960?
6?	0.961?
		7?	0.959?
8?	0.949?

Table 3

Tank body	d/R?	?h/(R-r)?	The thickness of slab rate of change	Blank diameter (mm)	?
						A?	0.19?	2.24?	1.20?	80.6?	Example of the present invention
B?	0.17?	1.85?	1.45?	93.1?	Example of the present invention
						C?	0.22?	2.77?	0.75?	69.5?	Example of the present invention
D?	0.24?	3.10?	0.65?	64.4?	Example of the present invention

^*) blank diameter that converts for the back of cutting edge of the blank diameter of record.

To 3 and following table 4, make two aerosol cans according to above-mentioned Fig. 1, table 1 in the following order.

1) stamping-out

For carrying out stamping-out as the two-sided steel plate of the TFS of raw sheet by hot smelting and coating process lamination pet film at the mild steel cold-rolled steel sheet that with thickness of slab is 0.17～0.24mm scope.Use the steel plate of the scope of blank diameter at 64～94mm.

2) pull and stretch processing and the processing of attenuate pull and stretch

Be shaped by pull and stretch processing (5 grades) make that r/R is 0.27～0.59, tank body that h/ (R-r) is 1.35～1.89 scope.And, suitably adopt the processing of attenuate pull and stretch simultaneously in order to make desirable jar.H/ (R-r), r/R after the pull and stretch processing are as shown in table 2.Wherein, the h in the table 2, r, R represent to carry out height, the radius that round-ended cylinder is arranged, the circular blank position radius of the open end under the state of undergauge respectively after pull and stretch processing.

3) dome shape of pot bottom processing

Carry out the hemispheric stretch process that the degree of depth is 6mm at pot bottom.

4) undergauge of tapered portion processing

The tapered portion undergauge is machined to the diameter identical with tank diameter.

5) side cut processing

The method that the processing of cutting edge is cut edge by impact style with outside by having circular port and inner edge cylindraceous is carried out, and the jar upper end is cut the 1mm degree.

6) up to undergauge processing less than the diameter of tank diameter

Implement undergauge processing in the open side of tank body, make final tank body and be shaped as h/ (R-r): 1.85～3.1, the tank body of the scope of d/R:0.17～0.24.Specifically, by at inner surface being the mould neck mode that the butt open end carries out undergauge on the mould of taper,, carry out multistage shaping according to degree of finish to processing from tank diameter to final pull and stretch diameter.The d/R of the tank body of producing in this processing, h/ (R-r) are as shown in table 3.

For the above trial-production jar that obtains, what the investigation film was peeled off has or not.Film is peeled off has or not adding and confirms to estimate by naked eyes man-hour.Resulting result and above-mentioned heat-treat condition are illustrated in table 4 in the lump.

Table 4

?	Degree of finish during heat treatment	Heat-treat condition	Peeling off of film	?
						Tank body	?d/R?	h/(R-r)?	?	?
A-1?	?0.38?	1.78?	220 ℃-30 seconds	Do not have	Example of the present invention
						A-2?	?0.47?	1.53?	220 ℃-30 seconds	Do not have	Example of the present invention
B-1?	?0.31?	1.7?	220 ℃-30 seconds	Do not have	Example of the present invention
						B-2?	?0.31?	1.7?	220 ℃-30 seconds	Do not have	Example of the present invention
C-1?	?0.5?	2.3?	220 ℃-30 seconds	Do not have	Example of the present invention
						C-2?	?0.3?	2.7?	220 ℃-30 seconds	Do not have	Example of the present invention
D-1?	?0.4?	2.8?	220 ℃-30 seconds	Do not have	Example of the present invention
						D-2?	?0.35?	2.9?	220 ℃-30 seconds	Do not have	Example of the present invention
A-3?	Do not have	Have	Comparative example	?	?
						B-3?	Do not have	Have	Comparative example	?	?
C-3?	Do not have	Have	Comparative example	?	?
						D-3?	Do not have	Have	Comparative example	?	?

As known from Table 4, in the manner example that work in-process is heat-treated, do not see peeling off of film on the way.On the other hand, peeling off of film taken place in the comparative example of not heat-treating, its result sees exposing of steel plate.

The seamless tin of the manner, since its good performance, two aerosol cans of the most suitable work.Except two aerosol cans, also be fit to require the purposes of tank intensity, corrosion resistance, aesthetic appearance and cheap cost.

(second mode)

(formation of tapered portion and undergauge manufacturing procedure)

The formation of tapered portion is one of most important key element in the manner.Circular blank is carried out drawing and forming and when being formed with the tank body of round-ended cylinder, for example shown in the patent documentation 2, usually so that the diameter of cylinder certain mode on short transverse is shaped, carries out undergauge then to the diameter less than drum diameter.But, under the situation of the target shape that laminate steel is configured as the manner, in the method, produce the phenomenon that the film of lamination is peeled off at open end.Think that its reason is, since with the diameter of cylinder under the situation that mode certain on the short transverse is shaped, open end is not all the time to be shaped slidably by the state of Drawing Die and Wrinkle-resisting unit clamping, thereby because the easy damaged of film of surface of steel plate, and in process, acted on wrinkle resistant pressure all the time, thereby on steel plate and film, acted on the power that the high direction of jar is arranged and the degree of finish that increases jar high direction at open end.That is, in order to address this problem, open end need be not formed by the state of Drawing Die and Wrinkle-resisting unit clamping slidably.The result who studies as can be known, till final pull and stretch processing, open front in tank body portion forms the tapered portion of stretching out to the tank body radial direction outside, then, the tapered portion undergauge is machined to the diameter identical with tank diameter, be configured as and make tank diameter certain on short transverse, solve the problem that the laminated film in the above-mentioned open end is peeled off thus.According to this method, open end does not get final product not slided by the state of Drawing Die and Wrinkle-resisting unit clamping, and can not produce the power towards edge jar high direction that wrinkle resistant pressure causes yet.

Form the method for tapered portion, preferably in pull and stretch processing, use the Drawing Die of inner surface, use the method for Wrinkle-resisting unit with tapered front end shape as taper.Tapered portion can be that the operation before final drawing sequence is provided with tapered portion as long as formed before final drawing sequence, keeps the method for the pull and stretch of tapered portion in the pull and stretch processing afterwards.In addition, make the perfect reduction of area in the final drawing sequence get bigger value, and only to use the Drawing Die of inner surface, do not use the method for Wrinkle-resisting unit to carry out pull and stretch and add man-hour, can get rid of the danger of the film damage that Wrinkle-resisting unit causes as far as possible as taper.

And for the shape of tapered portion, the taper surface of tank inner surface side is with respect to the preferred 20 °≤θ of the tilt angle theta of tank body central shaft≤70 °.If θ＜20 ° are easy to generate wrinkle in tapered portion when forming tapered portion by said method, if θ＞70 °, add man-hour at the undergauge until tank diameter of the tapered portion of then carrying out, easily at tapered portion generation wrinkle.Tapered portion is preferably 1.2≤dt/r≤2.5 to the overhang in the tank body radial direction outside with respect to radius dt, the tank body radius r of stretching out on the end.If dt/r＜1.2 item can not get forming the effect of tapered portion,, the undergauge until tank diameter of dt/r＞2.5 tapered portion of then carrying out produces wrinkle in tapered portion easily if adding man-hour.In addition, form the method for tapered portion by making expanded in diameter, owing on laminate steel, carry out excessive processing, thereby not preferred.Tapered portion, by then carrying out the diameter that undergauge is machined to round-ended cylinder, and it is certain on short transverse to be configured as the diameter that makes cylinder.

(the side cut manufacturing procedure of tapered portion)

In the manner, before the undergauge manufacturing procedure of tapered portion and/or thereafter, preferably to the tapered portion processing of cutting edge.By processing that tapered portion is cut edge, danger that can and then avoid film to peel off.Promptly, as the open end of the peripheral part of tapering part because degree of finish is higher, and since the close property of the slip that processing causes etc., film reduce, and, become the state that part is exposed of being close between film and the surface of steel plate physically, become the highest part of danger that film is peeled off.With respect to this part,, can reduce the danger that film is peeled off by removing carrying out being cut edge in the end of undergauge.And, because undergauge processing itself still improves the processing of the danger that the film of open end peels off, thus the processing of can after undergauge processing, cutting edge come so reduce after the danger peeled off of film in the processing.That is, the processing of cutting edge before and after the undergauge manufacturing procedure of tapered portion then becomes more good state, thereby preferred.

As the side cut method for processing, can adopt method that outside by having circular port and inner edge cylindraceous cut edge with impact style, utilize the inner edge (insertion tank interior) of the filled circles tubular of rotation and the method that the sharp discoid outside of edge part is cut edge etc. mutually.For tapered portion undergauge to the side cut before the diameter identical with tank diameter is processed, can be above-mentioned any means.For the preferred above-mentioned latter's method is processed in tapered portion undergauge to the side cut after the diameter identical with tank diameter.

To the undergauge processing that the open side of tank body portion is carried out, identical with first mode.

(the side cut manufacturing procedure after the undergauge processing)

In the processing of the open side undergauge of the tank body that round-ended cylinder will be arranged for little diameter than tank diameter because material along the circumferential direction is compressed, thereby film peel off dangerous higher.Therefore, it is effective open end being cut edge processing and excised.By the open end of undergauge, be formed with the protruding circle portion that is used to install injection valve.The processing of protruding circle portion can be shaped by curling and carry out.Produce finely when concavo-convex at open end, exist it to add the danger of the starting point that becomes crackle man-hour curling.From this respect, the unfavorable condition of the crackle in the time of behind undergauge, can avoiding forming protruding circle portion etc. by the processing of cutting edge.

The formation of protruding circle portion is identical with first mode.

More than can obtain the seamless tin of the manner, also can heat-treat in the manufacturing procedure of the following stated as required, other processing midway.

(manufacturing procedure heat treatment step midway)

In the manner, in addition, effectively implement heat treatment midway in a series of manufacturing procedure as reducing the dangerous method of film damage.That is, this is owing to can reduce the danger that the film in the processing is thereafter peeled off by relaxed the stress of following work in-process to be applied to the strain on the film by heat treatment.As the heat-treat condition of this purpose, the glass transition point of suitable is film is above, the heat treatment below fusing point+30 ℃, and then preferably, with respect to the polyester film of regulation in this application be more than 150 ℃, below fusing point+20 ℃.And, preferably, above-mentioned after just having heat-treated 30 seconds with interior so that preferred 10 seconds in, be cooled to the temperature of the glass transition point that is lower than film rapidly.Therefore heat treated purpose is the mitigation of internal stress, requires the heat treatment under the condition that internal stress relaxes.From this point of view, as the minimum temperature that internal stress can relax, set glass transition point, as the lower limit of this regulation.And,, set 150 ℃ as the lower limit of preferred heat treatment temperature with respect to the mylar of the manner.This is the lower limit that can carry out the temperature of short time processing with respect to the mitigation of internal stress.That is, when glass transition point is above, can relax internal stress, handle but can carry out the short time in time more than 150 ℃.The upper limit of heat treatment temperature is to consider the deterioration that the thermal decomposition of resin causes and the regulation of carrying out.In the time of in fusing point+30 ℃, preferred+scope of 20 ℃, the resin that thermal decomposition causes worsens and is out of question.

For heat-treating methods,, confirm to obtain identical effect by electric furnace, gas burner, infra-red furnace, induction heater etc. though do not limit especially.And firing rate, heat time heating time can suitably be selected to get final product according to effect, but firing rate is fast more effective more, and the target of heat time heating time is 15 seconds to 60 seconds degree, but is not limited to this scope, suitably selects to get final product according to effect.

(other processing)

As the aerosol can of the manner purpose, require 15kgf/cm in order to fill propellant ²Above compressive resistance.Rise with respect to the jar pressure inside, will be careful pot bottom especially.The pressure that the tank interior of round-ended cylinder is arranged, with respect to the sidewall effect of tank body portion with the stress of tank body to the direction of circumferencial direction expansion.But the tank body parts are processed abundant work hardening because of pull and stretch, can not be out of shape because of the effect that interior pressure causes.What press influence in needing to consider is pot bottom.Pot bottom since pressure effect under the state that the outer edge is retrained by tank body, being subjected to thereby be out of shape towards the jar outer side under the interior pressure condition with higher.In order to suppress interior distortion of pressing the jar end that causes, except increasing the thickness of slab of pot bottom, outside the method for the intensity of raising parts was effective, the dome shape that shape is formed to tank interior side depression also was fit to.

In addition, the manufacturing process of the manner is not limited to the situation that the tank body material uses laminate steel, also is applicable to the situation of using other former materials.

(embodiment 2-1)

Fig. 4 is the figure of manufacturing process of the seamless tin aerosol can of expression the manner.In Fig. 4, identical with reference to label with Fig. 1, with reference to label 3 expression tapered portion.And dotted line is the horizontal line of cutting edge.And the detailed conditions of drawing sequence is as shown in table 1, and undergauge is machined to less than the undergauge processing detailed conditions of the diameter of tank diameter as shown in table 2, and the shape of the tapered portion of the manner is as shown in table 5.And the laminate steel that carries out before and after the shaping at average stretching, open front portion place on the high direction of jar of aerosol can of undergauge processing is as shown in table 3 along the contraction of jar circumferencial direction.

Table 1, table 2, table 3 are with reference to first mode.

Table 5

Having or not of taper	θ (°)	dt/r?
			Have	40?	1.7?
Have	10?	1.7?
			Have	40?	1?
Do not have	-?	-?

By two aerosol cans of following sequentially built.

1) stamping-out

For carrying out stamping-out as the two-sided steel plate of the TFS of raw sheet by hot smelting and coating process lamination pet film at the mild steel cold-rolled steel sheet that with thickness of slab is 0.17～0.24mm scope.Using the scope of blank diameter is the steel plate of 64～94mm.

2) pull and stretch processing and the processing of attenuate pull and stretch

Be shaped by pull and stretch processing (5 grades) make that r/R is 0.27～0.59, tank body that h/ (R-r) is 1.35～1.89 scope.And, suitably adopt the processing of attenuate pull and stretch simultaneously in order to make desirable jar.H/ (R-r), r/R after the pull and stretch processing are as shown in table 2.Wherein, the h in the table 2, r, R represent to carry out height, the radius that round-ended cylinder is arranged, the circular blank position radius of the open end under the state of undergauge respectively after pull and stretch processing.And, carry out formation in the pull and stretch processing as the tapered portion of important elements in the manner example.Its processing method is carried out with following method: use the Drawing Die of inner surface as taper in pull and stretch shapes, use the Wrinkle-resisting unit with tapered front end shape.Shape for taper is as shown in table 5.Wherein, the θ in the table 5, dt, r represent that respectively the taper surface of tank inner surface side is with respect to the angle of inclination of tank body central shaft, the radius that stretches out the end, tank body radius.

3) dome shape of pot bottom processing

4) side cut processing

The method that the processing of cutting edge is cut edge by impact style with outside by having circular port and inner edge cylindraceous is carried out, and the jar upper end is cut the 2mm degree.

5) undergauge of tapered portion processing

6) undergauge of the diameter below drum diameter processing

For the above trial-production jar that obtains, what the investigation film was peeled off has or not.Film is peeled off has or not adding and confirms to estimate by naked eyes man-hour.Resulting result is as shown in table 6.

Table 6

?	Having or not of taper	θ (°)?	dt/r?	Appendix	?
						A-1?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
A-2?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						A-3?	Have	40?	1?	Do not form tapered portion	Comparative example
A-4?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
						B-1?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
B-2?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						B-3?	Have	40?	1?	Do not form tapered portion	Comparative example
B-4?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
						C-1?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
C-2?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example

C-3?	Have	40?	1?	Do not form tapered portion	Comparative example
						C-4?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
D-1?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
						D-2?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
D-3?	Have	40?	1?	Do not form tapered portion	Comparative example
						D-4?	Do not have	-?	-?	Peeling off of film arranged	Comparative example

As known from Table 6, in the manner example that forms tapered portion, do not see peeling off of film.Produce peeling off of film on the other hand in not forming the comparative example of tapered portion, its result sees that steel plate exposes.

(embodiment 2-2)

Fig. 2 is the figure by the manufacturing process of the seamless tin aerosol can of another example expression the manner.In Fig. 2, identical with Fig. 1 and Fig. 4 with reference to label, G represents protruding circle portion manufacturing procedure.And dotted line is the horizontal line of cutting edge.And, be machined to the shape of tapered portion of detailed conditions less than the undergauge processing of the diameter of tank diameter, the manner and the contraction of carrying out the laminate steel before and after the shaping at the average stretching along jar high direction, open front portion place of the aerosol can of undergauge processing along jar circumferencial direction for detailed conditions, the undergauge of drawing sequence, identical with embodiment 2-1.

As mentioned above, by two aerosol cans of following sequentially built.

1) stamping-out

2) pull and stretch processing and the processing of attenuate pull and stretch

Be shaped by pull and stretch processing (5 grades) make that r/R is 0.27～0.59, tank body that h/ (R-r) is 1.35～1.89 scope.And, suitably adopt the processing of attenuate pull and stretch simultaneously in order to make desirable jar.H/ (R-r), r/R after the pull and stretch processing are as shown in table 7.Wherein, the h in the table 7, r, R represent to carry out height, the radius that round-ended cylinder is arranged, the circular blank position radius of the open end under the state of undergauge respectively after pull and stretch processing.And, carry out formation in the pull and stretch processing as the tapered portion of important elements in the manner example.Its processing method is carried out with following method: use the Drawing Die of inner surface as taper in pull and stretch shapes, use the Wrinkle-resisting unit with tapered front end shape.Shape for taper is as shown in table 8.Wherein, the θ in the table 8, dt, r represent that respectively the taper surface of tank inner surface side is with respect to the angle of inclination of tank body central shaft, the radius that stretches out the end, tank body radius.

3) dome shape of pot bottom processing

4) side cut processing

5) undergauge of tapered portion processing

The tapered portion undergauge is machined to tank diameter.

6) undergauge that proceeds to the following diameter of drum diameter is processed

Implement undergauge processing on cylinder top, make final tank body and be shaped as h/ (R-r): 1.85～3.1, the tank body of the scope of d/R:0.17～0.24.Specifically, by at inner surface being the mould neck mode that the mould butt open end of taper carries out undergauge,, carry out multistage shaping according to degree of finish to processing from tank diameter to final pull and stretch diameter.The d/R of the tank body of producing in this processing, h/ (R-r) are as shown in table 3.

7) side cut processing

Cut edge and process, with the inner edge (insertion tank interior) by the mutual filled circles tubular that rotates, the method that the discoid outside that edge part is sharp is cut edge is carried out, and the jar upper end is cut the 1mm degree.

For by on the trial-production jar investigation film that obtains having or not of peeling off.Film is peeled off has or not adding and confirms to estimate by naked eyes man-hour.Resulting result is as shown in table 7.

Table 7

?	Having or not of taper	θ (°)?	dt/r?	Appendix	?
						A-5?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
A-6?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						A-7?	Have	40?	1?	Do not form tapered portion	Comparative example
A-8?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
						B-5?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
B-6?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						B-7?	Have	40?	1?	Do not form tapered portion	Comparative example
B-8?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
						C-5?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
C-6?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						C-7?	Have	40?	1?	Do not form tapered portion	Comparative example
C-8?	Do not have	-?	-?	Peeling off of film arranged	Comparative example
						D-5?	Have	40?	1.7?	There is not peeling off of film	Example of the present invention
D-6?	Have	10?	1.7?	Produce wrinkle in tapered portion	Comparative example
						D-7?	Have	40?	1?	Do not form tapered portion	Comparative example
D-8?	Do not have	-?	-?	Peeling off of film arranged	Comparative example

As known from Table 7, in the manner example that forms tapered portion, do not see peeling off of film.On the other hand, peeling off of film taken place in not forming the comparative example of tapered portion, its result sees that steel plate exposes.

The seamless tin of the manner is because its good performance is suitable as two aerosol cans most.Except two aerosol cans, also be fit to require the purposes of tank intensity, corrosion resistance, aesthetic appearance and cheap cost.

Claims

Laminate steel is carried out the operation of stamping-out;

To the peristome of this tank body cut edge processing operation;

After this cuts edge processing, to this peristome of this tank body with less than the diameter of this tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2); With

Form protruding circle portion at this open end of this tank body and obtain the operation of seamless tin,

Here, at least one operation in the above-mentioned operation comprises the operation that this laminate steel is heat-treated; And here, this heat treatment step comprises following operation: after this laminate steel being heated to the temperature below above and fusing point+30 of the glass transition point of film of this laminate steel ℃, 30 seconds with interior this temperature below glass transition point that is cooled to rapidly,

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

Laminate steel is carried out the operation of stamping-out;

To the peristome of this tank body cut edge processing operation;

After this cuts edge processing, to the peristome of this tank body with less than the diameter of this tank diameter and the operation of carrying out undergauge processing in the mode that satisfies following formula (1) and formula (2); With

After the above-mentioned operation, form protruding circle portion at this open end of this tank body and obtain the operation of seamless tin,

Here, at least one operation in the above-mentioned operation comprises the operation that this laminate steel is heat-treated; And, here, this heat treatment step comprises following operation: be the stage of 0.2≤d/R≤0.5,1.5≤h/ (R-r)≤2.5 at degree of finish, this laminate steel is heated to more than the glass transition point of film of this laminate steel and the temperature below fusing point+30 ℃ after, at 30 seconds with interior this temperature below glass transition point that is cooled to rapidly

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

3. the manufacturing process of seamless tin as claimed in claim 1 or 2 wherein, also comprises being used for forming the side cut manufacturing procedure of new open end at this peristome of this tank body after this undergauge manufacturing procedure of this peristome of this tank body.

4. the manufacturing process of seamless tin as claimed in claim 1 or 2, wherein, this laminate steel is the steel plate that covers organic resin film, described organic resin film contains mylar.

5. the manufacturing process of seamless tin as claimed in claim 4, wherein, this mylar is that the polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with in ethylene glycol and the butanediol at least one as principal component.

6. the manufacturing process of seamless tin as claimed in claim 4 wherein, contains the organic resin film of mylar, be with mylar as principal phase, parafacies contains the immiscible and Tg film at the resin below 5 ℃.

7. the manufacturing process of seamless tin as claimed in claim 6, wherein, the immiscible and Tg that contains as parafacies is selected from following at least a at the resin below 5 ℃:

Polyethylene, its sour modifier or its ionomer,

Polypropylene, its sour modifier or its ionomer.

8. the manufacturing process of seamless tin as claimed in claim 6, wherein, the mylar that contains as described principal phase, be that polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with in ethylene glycol and the butanediol at least one as principal component.

9. a seamless tin is shaped by each the described manufacturing process in the claim 1 to 8.

Laminate steel is carried out the operation of stamping-out;

Here,

1.5≤h/(R-r)…(1)

d/R≤0.25…(2)

11. the manufacturing process of seamless tin as claimed in claim 10, wherein, also comprise be used for before this undergauge manufacturing procedure of this tapered portion, any one stage at least after this undergauge manufacturing procedure of this tapered portion forms new open end on this tapered portion side cut manufacturing procedure.

12. the manufacturing process of seamless tin as claimed in claim 10 wherein, also comprises being used for forming the side cut manufacturing procedure of new open end in the open side of this tank body after this undergauge manufacturing procedure of this tank body open side.

13. the manufacturing process of seamless tin as claimed in claim 10, wherein, this laminate steel is the steel plate that covers organic resin film, and described organic resin film contains mylar.

14. the manufacturing process of seamless tin as claimed in claim 13, wherein, this mylar is that the polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with in ethylene glycol and the butanediol at least one as principal component.

15. the manufacturing process of seamless tin as claimed in claim 13 wherein, contains the organic resin film of mylar, be with mylar as principal phase, parafacies contains the immiscible and Tg film at the resin below 5 ℃.

16. the manufacturing process of seamless tin as claimed in claim 15, wherein, the immiscible and Tg that contains as parafacies is selected from following at least a at the resin below 5 ℃:

Polyethylene, its sour modifier or its ionomer,

Polypropylene, its sour modifier or its ionomer.

17. the manufacturing process of seamless tin as claimed in claim 15, wherein, the mylar that contains as described principal phase, be that polycondensation by dicarboxylic acids composition and diol component obtains, and, the dicarboxylic acids composition with terephthalic acids as principal component, diol component with in ethylene glycol and the butanediol at least one as principal component.

18. a seamless tin is shaped by each the described manufacturing process in the claim 10 to 17.

19. as method as described in the claim 1,2,10 each, wherein, the manufacturing process of the seamless tin of this laminate steel except deep drawing processing, also comprises the processing method of carrying out the processing of attenuate pull and stretch.

20. as each the described method in the claim 1,2,10, wherein, the number of drawing when forming the seamless tin of this laminate steel is below 10 times.

21. as each the described method in the claim 1,2,10, wherein, the perfect reduction of area when forming the seamless tin of this laminate steel is more than 0.4 carried out the first time by circular blank during pull and stretch, is more than 0.5 in the pull and stretch processing afterwards.

22., wherein, establish that this laminate steel is carried out the average thickness of slab that pull and stretch adds the side wall portion thickness of slab integral body of this tank body in man-hour is that t, former thickness of slab are t as each the described method in the claim 1,2,10 ₀The time, average thickness of slab rate of change is 0.5＜t/t ₀＜1.5 scope.

23. as each the described method in the claim 1,2,10, wherein, the degree of finish when this openend that seamless tin had of this laminate steel is carried out undergauge is d/r＞0.3 with respect to the radius r of tank body, the radius d of openend behind the undergauge.

24., wherein,, comprise at least a in following as the steel plate of the substrate of laminate steel as each the described method in the claim 1,2,10:

(4) using the C amount is the mild steel of 0.01～0.10% degree, carry out recrystallization annealing by coffin annealing or continuous annealing after, carry out the steel plate of secondary cold-rolling;

(5) use the IF steel that in the C amount is the ultra-low carbon steel of 0.003% following degree, adds solid solution C fixed element, the steel plate that carries out recrystallization annealing by continuous annealing.

25. as each the described method in the claim 1,2,10, wherein, it is curl at least a processing method in mode, the spinning mode of mould that this laminate steel is carried out the undergauge method for processing.