CN201669849U

CN201669849U - Quantitative check device

Info

Publication number: CN201669849U
Application number: CN2010201948386U
Authority: CN
Inventors: 骆艳东
Original assignee: Individual
Current assignee: Luo Huaihao
Priority date: 2010-05-10
Filing date: 2010-05-10
Publication date: 2010-12-15
Anticipated expiration: 2020-05-10

Abstract

The utility model relates to a quantitative check device, which comprises a material storage mechanism, an injection piston, a main valve body, a valve core, a front valve cover, a helical mechanism and an injection head tube which are connected through bolts. The center of the main valve body is provided with a through hole. A cone face which is at one side of the through hole is provided with an injection hole and the fish torpedo-shaped valve core is placed on the other side thereof. The lower end of the main valve body is provided with the injection head tube. The main valve body central through hole and the injection hole are communicated with the inner hole of the injection head tube and axial leads are on the same plane. The surface of the fish torpedo-shaped valve core is provided with a guide vane the outer circle of which matches the main valve body central through hole. The guide vane can move in the axial direction. The front valve cover is provided with a cone hole which matches a screw and the other side thereof is provided with a cone angle cone hole which tightly matches the head of the fish torpedo-shaped valve core. The utility model has the advantages of reasonable design, reliable use, easy material and color exchange, obvious mechanical sealing check effect, accurate and stable injection measurement and convenient maintenance and is applicable to various thermoplastic elastomers, medium fluid, rubber, silica gel and other quantitative injection systems.

Description

A kind of quantitative backstop

Affiliated technical field

The utility model relates to a kind of quantitative backstop, specifically relates to the quantitative backstop of horizontal feed injection system in a kind of full-automatic rubber injection forming equipment.

Background technology

At present, existing rubber injection moulding machine on the market adopts vertical injecting systems more, has the board excessive height, transports, installs, penetrates shortcomings such as metering is inaccurate, poor stability, maintaining inconvenience.The quantitative backstop of injecting systems of the same type, it is improper that its non-return spool is designed to the profile of flange shape, sphere, porthole shape or design, its precision that is sealed and matched is low, thereby can not guarantee the mechanical seal function of non-return spool, do not reach effective non-return effect, and influence the accuracy and the stability of injection measurement, and weakened the broken glue ability of injecting systems greatly.

Summary of the invention

The purpose of this utility model be for change that the charging quality provides with the defective of injection material measurement technology in the existing fluid injection system a kind of have reasonable in design, one-way flow is big, non-return better effects if, metering are accurate, good stability, the quantitative backstop of advantage such as material extremely not.

In order to achieve the above object, a kind of quantitative backstop is provided, comprise bin stock mechanism, injection ram, main valve body, spool, preceding valve gap, screw mechanism and injection head pipe, it is characterized in that: described injection ram is installed in the bin stock mechanism, injection ram one end is connected with main valve body, the profile of main valve body is the flange valve body, the main valve body axial centre has through hole, the through hole of the side that main valve body is connected with injection ram is internal conical surface, one section cylindrical hole is arranged in the middle of the through hole, fluid injection orifice perpendicular to the conical surface is arranged in taper seat, and the central through hole opposite side is equipped with the spool and the preceding valve gap of torpedo shape; The valve body bus of torpedo shape spool is a parabola, head is a cone, afterbody is with hemisphere camber line and valve body smooth transition, the valve body surface is provided with equally distributed guide vane, the inboard cylindrical hole of the cylindrical of guide vane and main valve body through hole matches and merges and can move axially, the afterbody of guide vane is conical, and matches with the taper hole of the cylindrical hole front end at main valve body center; In the valve gap, the injection head pipe was fixed on the main valve body before the tapering point of the screw rod in the screw mechanism extended in, and the injection head pipe orifice communicates with injection orifice; Bin stock mechanism, main valve body, preceding valve gap and screw mechanism all tighten together by the high-strength bolt order.

The circular cone angle of spot hole α 1 that described main valve body matches with injection ram is 90 °, the angle of countersink of the cylindrical hole front end of main valve body axial central through hole is that the taper seat of the side that is connected with injection ram of α 2 and main valve body also is 90 ° with the angle α 3 that the injection duct forms, be 3=90 ° of α 1=α 2=α, and the axial line in three holes all at grade.

The spool design of quantitative backstop of the present utility model is the torpedo profile, and described torpedo shape spool is provided with equally distributed 3 guide vanes, and each guide vane front end face angle is 60 ° of acute angles; The cone angle 4 of torpedo shape spool head cone is 90 °, the afterbody angled end-face of guide vane extends the cone angle 5 of the cone that intersects formation and the afterbody angled end-face of guide vane and the angle α 6 that the afterbody rear end face forms and also is 90 °, and promptly α 4=α 5=α is 6=90 °.The angle α 6 that the afterbody angled end-face of guide vane and afterbody rear end face form is designed to 90 °, and purpose is for the uniformity of the stressed distribution of afterbody of strengthening torpedo shape spool and strengthens cross section and the space of fluid when the forward flow, reduces the forward flow resistance.

Valve gap also is the independently non-return valve gap of flange shape before described, preceding valve gap body shaft is to through hole is arranged, the conical bore of one side for matching with feed worm, opposite side has and the mutually close-fitting conical bore cone angle 7 of torpedo shape spool head, α 7 is 90 °, this conical bore is the charging hole of fluid, is again the sealing surface that forms mechanical seal with torpedo shape spool inner cone.Preceding valve gap body axially extending bore helps fluid to be passed through.

The quantitative backstop of the utility model has following advantage:

1, the quantitative backstop of the utility model, main valve body is designed to flanged valve shape, and scientifically designed the angle that fluid injection orifice on the taper seat of 90 ° conical bore cone angle and one side and the conical surface intersect, not only solved in dense fluids corner injection process, injection force is not enough and high-speed friction on the corner takes place fluid and quality problems that heating etc. bring.Particularly solved in the injection process of horizontal rubber injection moulding machine, rubber high-speed friction heating on the corner takes place and cure, the quality problems brought such as material extremely, and improved the injection force of injecting systems greatly.

2, the quantitative backstop of the utility model, with spool design is the torpedo profile, by facts have proved, compared with prior art, the appropriate design of guide vane on the selection of its cone cone angle size and its valve body surface, make its steering capability and non-return effect remarkable, not only solved the quality problems that caused because of the non-return poor performance of spool in mobile before rubber charging and the injection process.The utility model spool is selected 3 guide vanes, and each guide vane front end face angle is 60 ° of acute angles and 90 ° of cone angles of spool head, its advantage is the steering capability that had both guaranteed non-return spool, reduced the resistance of fluid forward flow in the fill process again, improved the speed of fluid forward flow, and improved and penetrated the injection accuracy and the stability of system, and the anti-dead material and the broken glue ability of injecting systems have been improved greatly.

3, parts such as the bin stock mechanism of this device, injection ram, main valve body, spool, preceding valve gap, screw mechanism and injection head pipe all adopt high-quality 38 chrome molybdenum aluminium (38CrMoAl) A level materials to make, through forge, PROCESS FOR TREATMENT such as modified, fine finishining, nitriding, polishing grinding, strengthen material hardness and wearability, improved the mechanical sealing performance of non-return spool, improved the radiating effect of fluid when endoporus flows, and easy to maintenance.

4, this device is reasonable in design, uses simple and reliablely, and the colour changing of reloading is easy, the non-return effect of mechanical seal is remarkable, and injection measurement is precisely stable, easy to maintenance, be adapted at various thermoplastic elastomer (TPE)s, use in the calibrated shot systems such as medium fluid, rubber, silica gel, have popularizing application prospect widely.

Description of drawings

Fig. 1 is the quantitative backstop device structure schematic diagram of the utility model.

Fig. 2 is the generalized section of Fig. 1.It among the figure device feed state schematic diagram.

Fig. 3 is this device injection material view.

Fig. 4, Fig. 5 are the utility model main valve body perspective view.

Fig. 6 is the utility model main valve body generalized section.

Fig. 7 is that the A-A of Fig. 6 is to view.

Fig. 8 is the utility model torpedo shape spool perspective view.

Fig. 9 is the utility model torpedo shape spool front view.

Figure 10 is the right view of Fig. 9.

Figure 11 is that the C-C of Figure 10 is to cross section view.

Figure 12 is a valve gap perspective view before the utility model.

Figure 13 is a valve gap profile before the utility model.

Among the above-mentioned figure: valve gap, 6 screw rods, 7 screw mechanisms, 8 bolts, 9 injection head pipes, 10 injection orifices, 11 guide vanes, 12 valve body breech faces, 13 spool head taper seats, 14 guide vane front end face angles, 15 afterbody angled end-faces, 16 afterbody rear end faces, 17 spool valve body buses before 1 bin stock mechanism, 2 injection rams, 3 main valve bodies, the 4 torpedo shape spools, 5.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment 1: a kind of quantitative backstop of the utility model, and shown in Fig. 1,2 and 3.Comprise bin stock mechanism 1, injection ram 2, main valve body 3, torpedo shape spool 4, preceding valve gap 5, screw rod 6, screw mechanism 7 and injection head pipe 9, bin stock mechanism, main valve body, preceding valve gap, screw mechanism are tightened together in proper order by high-strength bolt 8.

The structure of main valve body 3, referring to Fig. 4,5,6,7, the profile of main valve body is the flange valve body, the main valve body axial centre has through hole, and the through hole of the side that main valve body is connected with injection ram is internal conical surface, and one section cylindrical hole is arranged in the middle of the through hole, fluid injection orifice 10 perpendicular to the conical surface is arranged in taper seat, the central through hole opposite side be equipped with torpedo shape spool and before valve gap, machining accuracy: make among the figure 3=90 ° ± 0.1 ° of α 1=α 2=α, and the axial line in three holes is all at grade.

The structure of torpedo shape spool 4, referring to Fig. 8,9,10,11, described torpedo shape spool is provided with equally distributed 3 guide vanes, and each guide vane front end face angle 14 is that 60 ° of acute angles and spool head cone angle are 90 °, the inboard cylindrical hole of the cylindrical of guide vane and main valve body through hole matches to merge and can move axially machining accuracy: make among the figure 6=90 ° ± 0.1 ° of α 4=α 5=α; The spool of this design had both guaranteed its steering capability, had reduced the resistance of fluid forward flow in the fill process again, reduced the load of screw feed; Improved the speed of fluid forward flow, especially improved the injection accuracy and the stability of the system of ejaculation, and improved the anti-dead material and the broken glue ability of injecting systems greatly, to the broken glue ability of high durometer rubber material up to more than 95 (the Shao Er A).

Preceding valve gap also is the independently non-return valve gap of flange shape, referring to Figure 12 and 13; Preceding valve gap body shaft is to through hole is arranged, the conical bore of one side for matching with feed worm, opposite side has and the mutually close-fitting conical bore cone angle 7 of torpedo shape spool head, α 7 is 90 °, this conical bore is the charging hole of fluid, is again the sealing surface that forms mechanical seal with torpedo shape spool inner cone.

Above-mentioned each parts all adopt high-quality 38 chrome molybdenum aluminium (38CrMoAl) A level materials to make, through forge, PROCESS FOR TREATMENT such as modified, fine finishining, nitriding, polishing grinding, (can not adopt quench hot heat treatment, plasticity is poor) strengthened the hardness of material surface, anticorrosion and anti-wear performance; Each parts bore area and valve core surface must be ground and polishing simultaneously, so not only guaranteed the non-return performance of mechanical seal of head taper seat 13 with the endoporus taper seat of preceding valve gap 5 of torpedo shape spool 4, and reduced the adhesion resistance of fluid media (medium) (as: rubber mass) at the device endoporus, the operation of changing raw material and changing the raw material color is become be easy to.

Embodiment 2: the quantitative backstop of the utility model, its course of work such as Fig. 2, shown in 3, the fluid feed process is referring to Fig. 2, screw rod 6 rotates under the driving of hydraulic motor, fluid media (medium) is under the thrust of screw rod, promote the head taper seat 13 on the torpedo shape spool 4, under the guiding of three uniform guide vanes 11, retreat simultaneously the inboard cylindrical hole of through hole that withstands main valve body 3 to afterbody angled end-face 15, fluid media (medium) forward from the gap of guide vane flows in the storage chamber of material storage machine structure 1, charging reposefully, and promote injection ram 2 and retreat to the gauge position of setting, finish charging.Referring to Fig. 3, in fluid ejaculation process, fluid media (medium) is under the external force F of injection ram effect, fluid promotes torpedo shape spool 4 and advances, the endoporus taper seat of valve gap 5 before head taper seat 13 on the torpedo shape spool withstands, two conical surfaces closely cooperate and form the mechanical seal effect, and make the fluid media (medium) can not reverse backflow.And big more its sealing effectiveness of injection force is remarkable more.Thereby fluid media (medium) can only be penetrated from the injection orifice 10 of main valve body 3, the fluid media (medium) that has measured in the bin stock mechanism 1 accurately and reposefully is injected to moulding in the mold cavity, finish the process that quantitatively precisely penetrates.

The quantitative backstop of the utility model is reasonable in design, use simple and reliable, the colour changing of reloading is easy, one-way flow is big, and the non-return effect of mechanical seal is remarkable, and injection measurement is precisely stable, easy to maintenance, be adapted at various thermoplastic elastomer (TPE)s, use in the calibrated shot systems such as medium fluid, rubber, silica gel, have popularizing application prospect widely.

Claims

1. quantitative backstop, comprise bin stock mechanism, injection ram, main valve body, spool, preceding valve gap, screw mechanism and injection head pipe, it is characterized in that: described injection ram is installed in the bin stock mechanism, injection ram one end is connected with main valve body, the profile of main valve body is the flange valve body, the main valve body axial centre has through hole, the through hole of the side that main valve body is connected with injection ram is internal conical surface, one section cylindrical hole is arranged in the middle of the through hole, fluid injection orifice perpendicular to the conical surface is arranged in taper seat, and the central through hole opposite side is equipped with the spool and the preceding valve gap of torpedo shape; The valve body bus of torpedo shape spool is a parabola, head is a cone, afterbody is with hemisphere camber line and valve body smooth transition, the valve body surface is provided with equally distributed guide vane, the inboard cylindrical hole of the cylindrical of guide vane and main valve body through hole matches and merges and can move axially, the afterbody of guide vane is conical, and matches with the taper hole of the cylindrical hole front end at main valve body center; In the valve gap, the injection head pipe was fixed on the main valve body before the tapering point of the screw rod in the screw mechanism extended in, and the injection head pipe orifice communicates with injection orifice; Bin stock mechanism, main valve body, preceding valve gap and screw mechanism all tighten together by the high-strength bolt order.

2. a kind of quantitative backstop according to claim 1, it is characterized in that: the circular cone angle of spot hole α 1 that described main valve body matches with injection ram is 90 °, the angle of countersink of the cylindrical hole front end of main valve body axial central through hole is that the taper seat of the side that is connected with injection ram of α 2 and main valve body also is 90 ° with the angle α 3 that the injection duct forms, be 3=90 ° of α 1=α 2=α, and the axial line in three holes all at grade.

3. a kind of quantitative backstop according to claim 1 is characterized in that: described torpedo shape spool is provided with equally distributed 3 guide vanes, and each guide vane front end face angle is 60 ° of acute angles.

4. a kind of quantitative backstop according to claim 1, it is characterized in that: the cone angle 4 of described torpedo shape spool head cone is 90 °, the afterbody angled end-face of guide vane extends the cone angle 5 of the cone that intersects formation and the afterbody angled end-face of guide vane and the angle α 6 that the afterbody rear end face forms and also is 90 °, and promptly α 4=α 5=α is 6=90 °.

5. a kind of quantitative backstop according to claim 1, it is characterized in that: valve gap also is the independently non-return valve gap of flange shape before described, preceding valve gap body shaft is to through hole is arranged, the conical bore of one side for matching with feed worm, opposite side has and the mutually close-fitting conical bore cone angle 7 of torpedo spool head, α 7 is 90 °, and this conical bore is the charging hole of fluid, is again the sealing surface that forms mechanical seal with torpedo spool inner cone.