JPH081596A - Hole drilling method and joining method using the hole drilling method - Google Patents

Abstract

PURPOSE:To provide a hole drilling method by which through holes can be formed easily and a net body can be obtained at low cost. CONSTITUTION:A through member 5 having temperature equal to boiling point temperature of silicone rubber is positioned and arranged on a top surface of a sheet material 1 made of silicone rubber, and the through member is lowered to pass it through the sheet 1 by melting the sheet 1 by heat so that a transparent hole 2 is formed. The operation is repeated by shifting the position of the through member 6 to form many through holes 2 in the sheet material 1 so as to constitute a net body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boring method and a joining method using the boring method.

[0002]

[Prior art]

2. Description of the Related Art A net 35 shown in FIG. 20 is used, for example, as a core material by being installed in a collar of a kimono or as a packing material. Then, there is injection molding as a method for obtaining the net body 35 having such innumerable through holes 36.

2. Description of the Related Art For example, when a cloth is bonded to a sheet material formed by rolling silicon rubber, an adhesive is applied to the bonding surface of the cloth or the sheet material, and the bonding surfaces are butted against each other.

[0004]

However, in the prior art, it is necessary to prepare a mold for molding, the preparation is troublesome, and it is not possible to easily form the through hole 36 to form the net body 35. There wasn't. Moreover, since the through holes 36 of the net 35 are formed at minute intervals, the through holes 36 are not formed.
In order to form the mold, it is necessary to accurately form a cavity in the molding die, and the cost of the die increases the manufacturing cost.

Further, in the net body 35 as shown in FIG. 20, since the through hole 36 is formed in a square shape to facilitate the formation of the cavity, when a tensile force is applied to the net body 35, Stress was concentrated in the corners of the square and it was easy to tear.

In the prior art, an adhesive is required as a joining medium in addition to the objects to be joined, and the cost is high, and the work of applying the adhesive to the joining surface is troublesome, and the joining work including the curing time is required. It took time. In addition, the silicone rubber may be melted by a chemical reaction depending on the components of the adhesive material, and the adhesive agent that can be used for bonding is limited. Further, if the adhesive is applied in a predetermined amount or more, the adhesive may squeeze out from the stitches formed on the cloth, and the surface of the cloth may be soiled, so that it may not be a product. Moreover,
Since one side is cloth, the surface to which the adhesive is applied becomes stiff, and for example, when the sheet material and the cloth are joined to be used for clothing, there is a problem that the touch of the part becomes poor.

The present invention has been made in order to solve the problems existing in the above-mentioned prior art. The first object of the present invention is to easily form a through hole and obtain a net body at low cost. It is to provide a drilling method capable of Also,
A second object of the present invention is to provide a joining method that can easily join the article to be joined and the article to be joined without using a joining medium such as an adhesive.

[0008]

In order to achieve the first object, according to the invention of claim 1, the high temperature member is pierced through the object to be processed made of a thermoplastic resin while being melted by its heat. This is a method for forming holes.

According to the second aspect of the present invention, the high temperature member is set to a temperature around the boiling point of the thermoplastic resin. In the invention of claim 3, a plurality of holes are formed so that the outer edge ends of one hole are in contact with the outer edge ends of the other holes.

In order to achieve the second object, according to the invention of claim 4, the object to be bonded is bonded to the object made of a thermoplastic resin by using the punching method according to any one of claims 1 to 3. Is a joining method for joining.

[0011]

According to the invention of claim 1 having the above-mentioned structure, a hole can be formed by a simple operation of piercing a high-temperature member in an object to be processed, and a resin melted at the opening edge of the hole is obtained. It does not rise and become thick, and the strength of the same edge does not deteriorate.

According to the second aspect of the present invention, when the high temperature member is pierced through the object to be processed, the thermoplastic resin instantly melts and expands and rises to the opening edge of the hole to form the hole quickly. You can

According to the third aspect of the present invention, even if a plurality of holes are formed, the resin swells up at the edge of the opening to increase the thickness and suppress the decrease in strength. Even if a tensile force is applied to the net, its durability is improved.

In the invention of claim 4, claims 1 to 3
By using the perforation method described in any one of (1) to (4) above, the article to be joined can be easily joined to the article.

[0015]

[First Embodiment] A first embodiment of the drilling method of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a sheet material formed by heating and rolling silicon rubber as a processing object made of a thermoplastic resin, and 2 denotes a through hole provided as a hole in the sheet material 1. ing.
In the through hole 2, the silicon rubber swell 101 at the upper opening edge is larger than the swell 102 at the lower opening edge. Then, as shown in FIG. 2, in this embodiment, the sheet material 1 has through holes 2
Are pierced through, and the outer circumferences of the swells formed in one through hole 2 are arranged so that the outer circumferences of the swells of the other through holes 2 are in contact with each other. In this way, the net body 6
Is configured.

Next, a method of punching the sheet material 1 will be described. As shown in FIG. 3, a thermal iron 3 is arranged above the sheet material 1. The same iron 3 has a heating part 4
And a penetrating member 5 as a high temperature member having a tapered end. The heat generating part 4 is connected to a power source or the like (not shown) to serve as a heat source, and the generated heat is conducted to the penetrating member 5 connected to the heat generating part 4. The same heating unit 4
Is configured such that the temperature of the penetrating member 5 is about the boiling point of silicon rubber (the boiling point varies depending on the type and amount of the mixed additive, and therefore will not be described in detail).
The penetrating member 5 has a circular cross section.

Then, as shown in FIGS. 3 to 5, the penetrating member 5 of the thermal iron 3 is positioned above the sheet material 1,
The penetrating member 5 is lowered to melt and penetrate the sheet material 1 by the heat. At this time, since the penetrating member 5 is set to a temperature around the boiling point of the silicon rubber, the silicon rubber instantly melts and expands, and as shown by 101 in FIG. It elutes and rises. Until the sheet material 1 is penetrated, the outlet of the melted and expanded silicon rubber is only the opening on the insertion side. Therefore, until the penetrating member 5 penetrates the sheet material 1, the elution of the silicone rubber is on the insertion side. After the penetration, as shown by 102 in FIG.
Rises on the exit side of. Then, this operation is repeated while shifting the position of the penetrating member 5 to form a large number of through holes 2 in the sheet material 1 as shown in FIG.

It should be noted that a large number of through holes 2 may be formed at once by using a member having a large number of penetrating members 5. Further, the penetrating member 5 is arranged at a fixed position, and the sheet material 1
You may perform a drilling operation while sending.

The net body 6 constructed as described above is used, for example, as a core material by being inserted in a collar of a kimono. Further, as another example of use, it is used for packaging materials such as foods. In the present embodiment, the net body 6 as shown in FIG.
Therefore, it is not necessary to use a molding die as in injection molding, and the manufacturing cost can be reduced.

Further, in the obtained net body 6, since the melted silicon rubber rises at the opening edge portion of the through hole 2, that portion (indicated by 101 and 102) becomes thicker and formed. Since the through hole 2 has a circular shape, the stress is not concentrated in one place even when a tensile force is applied, and therefore the tensile strength is improved.

[0021]

Second Embodiment A second embodiment embodying the joining method of the present invention will be described below with reference to the drawings. 6 to 9, 10 indicates a sheet material formed by heating and rolling silicon rubber as a joined article made of a thermoplastic resin, and 11 indicates a cloth (woven by a loom) formed by weaving yarns as an article to be joined. Or
A cloth knitted by a knitting machine) is shown. Then, according to the joining method of the present embodiment, the sheet material 10 and the cloth 11 are joined. This will be described in detail below.

As shown in FIGS. 6 to 9, the cloth 11 is provided with through holes 12 by means of a perforating tool such as scissors or a cutter. The thermal iron 3 has the same configuration as that of the first embodiment,
The diameter of the penetrating member 5 is smaller than the diameter of the through hole 12.

Then, the cloth 11 is positioned and placed on the upper surface of the sheet material 10, and the penetrating member 5 of the thermal iron 3 arranged above the through hole 12 is lowered toward the through hole 12. The lowered penetrating member 5 passes through the through hole 12, and penetrates the sheet material 10 viewed through the through hole 12 while being melted by its heat. At this time, as shown in FIG. 7, when the penetrating member 5 starts melting the sheet material 10, the silicon rubber melted and expanded thereby is pushed away by the penetrating member 5 and rises in the through hole 12. Although not shown, the sheet material 10 and the cloth 11
A small amount of silicone rubber is also eluted between and.

As shown in FIG. 8, when the penetrating member 5 is further lowered and penetrates the sheet material 10, the molten silicon rubber rises up to the upper surface of the cloth 11 (indicated by 201 in the figure). Further, as indicated by 202 in the drawing, the amount slightly rises on the outlet side of the penetrating member 5.

Then, as shown in FIGS. 7 to 9, the silicon rubber melted as described above and raised in the through holes 12 of the cloth 11 is changed to the cloth 1 as shown by 203 in the drawings.
1 between the yarns constituting the first yarn, between the single yarns (the yarn is a twisted yarn formed by twisting a plurality of single yarns), or between the fibers, and solidified as it is to form the sheet material 10. The cloth 11 is joined.

Further, in the present embodiment, the through holes 12 are formed in the cloth 11 by post-processing. When the through holes 12 are formed, the melted silicon rubber also enters between the fibers (which appear in a sawtooth shape in the through holes 12 in FIGS. 6 to 9) by unraveling the single yarns to strengthen the joint. ing.

In this embodiment, as described in the first embodiment, the fact that the swell 201 on the insertion side of the penetrating member 5 in the sheet material 10 is larger than the swell 202 on the outlet side is utilized, The material 10 and the cloth 11 are joined together.

As described above, in this embodiment, the cloth 11
The sheet material 10 and the cloth 11 can be joined by a simple operation in which the through hole 12 is formed in the through hole 12 and the penetrating member 5 heated to a high temperature is inserted from the through hole 12 to penetrate the sheet material 10. Therefore, an adhesive material as a joining medium becomes unnecessary. Therefore, the following effects are achieved.

The cost of the adhesive material can be reduced, and further, the work of applying the adhesive to the joint surface is not required, and the joint work time including the curing time can be shortened. Further, there is no risk of chemical reaction between the adhesive and the sheet material 10 made of silicon rubber.

Furthermore, the cloth 1 by applying an adhesive
There is no concern about dirt on the surface of No. 1 or stiffness of the surface coated with the adhesive. In addition, during the joining operation, through holes are formed in the sheet material 10. However, since swells 201 and 202 are formed near the opening edge portions of the through holes, this portion becomes thick and the sheet is formed. The strength of the material 10 does not decrease. This also applies to the third to fifth embodiments described below.

[0031]

Third Embodiment A third embodiment of the present invention will be described below with reference to the drawings. In FIGS. 10 to 13, reference numeral 15 denotes an upper sheet material that is one outer joint, 16 denotes a lower sheet material that is the other outer joint, and 17
Indicates a cloth as an article to be joined, and the upper and lower sheet materials 1
5, 16 and the cloth 17 have the same configurations as the sheet material 10 and the cloth 11 of the second embodiment. Then, according to the joining method of the present embodiment, the upper and lower sheet materials 15 and 16 and the cloth 17 interposed therebetween are joined. This will be described in detail below.

As shown in FIG. 10, a cloth 17 as an article to be joined is provided between the upper sheet material 15 and the lower sheet material 16.
Are arranged, and through holes 18 are formed in the cloth 17.
Then, the penetrating member 5 of the thermal iron 3 similar to that of the first embodiment.
Is lowered while melting the upper sheet material 15. Figure 11
As shown in FIG. 3, when the penetrating member 5 penetrates the upper sheet material 15, the lower sheet material 1 is then passed through the through holes 18 of the cloth 17.
Melt 6.

As shown in FIGS. 11 and 12, the penetrating member 5
When is further lowered, the molten silicon rubber of the lower sheet material 16 rises to the insertion side of the penetrating member 5, and when the penetration of the lower sheet material 16 by the penetrating member 5 is completed, The protrusion 301 on the insertion side of the penetrating member 5 is welded to the protrusion 302 on the outlet side of the penetrating member 5 in the upper sheet material 15. As a result, as shown in FIG. 12, the upper and lower sheet materials 15 and 16 are joined to each other through the through holes 18 of the cloth 17, and the cloth 17 is sandwiched between them.

Then, as in the second embodiment, as shown in FIG.
And, as indicated by reference numeral 303 in FIG. 13, the melted silicone rubber soaks around the through hole 18 of the cloth 17 and is solidified, so that the cloth 1 is interposed between the upper and lower sheet materials 15 and 16 joined together.
7 is securely fixed.

In this embodiment, the upper and lower sheet materials 15,
Between the upper and lower sheet materials 15, 16 by a simple operation of arranging the cloth 17 between 16 and penetrating the penetrating member 5 through the upper and lower sheet materials 15, 16 through the through holes 18 formed in the cloth 17. The cloth 17 can be joined to the. Therefore, a bonding medium such as an adhesive is not needed.

[0036]

Fourth Embodiment A fourth embodiment of the present invention will be described below with reference to the drawings. In FIGS. 14 to 17, 20
Indicates a sheet material having the same configuration as the sheet material 1 of the first embodiment, and 21 indicates a plate material having rigidity as an object to be joined, which is formed by rolling an aluminum material which is a metal material. Then, according to the joining method of the present embodiment, the sheet material 20 and the plate material 21 are joined. This will be described in detail below.

As shown in FIG. 14, the plate material 21 has through holes 22.
Are cut and formed, and the plate member 21 is positioned and placed on the upper surface of the sheet member 20. Then, as shown in FIGS. 15 and 16, similarly to the second embodiment, the penetrating member 5 of the thermal iron 3 is lowered, and the sheet material 20 is melted by the heat and penetrated through the through hole 22. . In the present embodiment, the molten and expanded silicon rubber rises to the insertion side of the penetrating member 5 as in the second embodiment, but since the silicon rubber does not soak into the plate material 21 made of an aluminum material, The silicon rubber raised on the insertion side is eluted to the surface of the plate member 21 as indicated by 401 in FIGS. 16 and 17.

Then, as shown in FIG. 17, the plate member 21 is formed by the sheet member 20 located below the plate member 21 and the elution portion 401 continuous to the sheet member 20 through the through hole 22.
The sheet material 20 and the plate material 21 are joined to each other by sandwiching.

In the present embodiment, the sheet material 20 and the plate material 21 made of aluminum material are operated by the above-described simple operation.
Can be joined together, and a joining medium such as an adhesive becomes unnecessary.

[0040]

[Fifth Embodiment] A fifth embodiment of the present invention will now be described with reference to the drawings. As shown in FIGS. 18 and 19, the pad 25 is formed by molding silicone rubber, which is a thermoplastic elastomer, as a thermoplastic resin, and has a curved surface shape corresponding to a female breast. Then, a pair of pads 25 are bonded at one side thereof to form a brassiere pad 26. A cloth 27 is joined to the back surface side of the pad 25 along the curved shape thereof. The joining method will be described below.

As shown in FIG. 19, when bonding the cloth 27 to the back surface of the pad 25, first, the cloth 27 cut according to the shape of the back surface of the pad 25 is placed on the back surface of the pad 25. . The needle-shaped penetrating member 28 as a high temperature member has a minute diameter around the stitches 29 of the cloth 27 and is connected to a heat generating portion (not shown). Then, as in the case of the first embodiment, the penetrating member 28 heated to a high temperature by the heat generating portion is attached to the cloth 2
Insert from the 7 side. The penetrating member 28 inserted in the cloth 27
Passes through the knitting 29 of the cloth as a through hole, and the heat thereof melts and penetrates the pad 25. At this time, similar to the first embodiment, as shown by 501 in FIG. 19, the silicone rubber that is largely raised on the insertion side of the penetrating member 28 is not covered with the cloth 2.
The cloth 27 is joined to the pad 25 by flowing between the stitches of No. 7 or between the single yarns of the yarn or the fibers of the single yarns and solidifying as it is. The cloth 27 can be reliably fixed to the pad 25 by performing the joining operation using the penetrating member 28 a plurality of times on the entire curved surface of the pad 25 or a part thereof. In addition, if the penetrating work by the penetrating member 28 is performed by a member that supports a plurality of penetrating members 28,
A large number of joints can be formed with a single penetration operation.

In this embodiment, the high temperature penetrating member 28 is used.
The pad 25 and the cloth 27 can be reliably joined by a simple operation of merely penetrating the pad 25 through the cloth 27. For this reason, it is possible to eliminate the cost increase due to the use of the adhesive material and the stiffness of the cloth 27 surface.

Further, a large number of through holes 30 formed on the entire curved surface or a part of the curved surface of the pad 25 are provided in the brassiere pad 2.
When 6 is used, it can function as a ventilation hole to prevent stuffiness of the breast covered with the pad 25.

Further, the stitches 29 of the cloth 27 are used as through holes,
The needle-shaped penetrating member 28 is used for joining. Therefore, it is not necessary to form the through hole in the cloth 27, the labor thereof can be saved, and the joint portion becomes inconspicuous.

The brassiere pad 26 as described above is attached as a brassiere by attaching a string or the like (not shown) to the extending portions 31 extending around the curved surfaces formed on the upper and side portions of the left and right pads 25. It can be used or can be used as a raised pad by interposing it between the brassiere and the chest.

The present invention is not limited to the above embodiments, and can be carried out in the following modes without departing from the spirit of the present invention. (1) In the first to fourth examples, the thermoplastic resin is embodied in silicone rubber. However, the present invention is not limited to this, and may be embodied in other thermoplastic resins such as ABS, vinyl chloride resin, polyethylene, and polypropylene. It may also be embodied as a thermoplastic elastomer such as urethane rubber. In the above case, the temperature of the penetrating member 5 is appropriately set to a temperature near the boiling point of each resin. (2) In the fourth embodiment, the plate material 2 which is the article to be joined
Although 1 is made of an aluminum material as a metal material, it is not limited to this, and may be embodied as another metal material such as an aluminum alloy, gold, silver, copper or iron. Further, a plate material made of resin such as plastic may be used as the rigid plate material. (3) In the fifth embodiment, the pad 25 alone is used. For example, the pad 25 is used between a brassiere and a breast to raise the breast, or a pseudo breast for a person who does not have one breast. (4) The article to be joined is embodied as the cloth 17 in the third embodiment. However, the present invention is not limited to this, and the cloth 17 may be changed to a plate member 21 made of an aluminum material as in the fourth embodiment, and the plate member 21 may be joined between the upper and lower sheet members 15 and 16. good. (5) In the second and third embodiments, the cloths 11 and 17
The through-hole 28 is formed as a through hole, and the penetrating member 28 is configured as in the fifth embodiment to perform the joining. By doing so, the joint portion becomes inconspicuous, and the labor for forming the through holes 12 and 18 can be saved.

The technical ideas other than the claims that can be understood from the above-described embodiments will be described below along with their effects. (1) The article to be joined 11, 21, 27 is placed on one side surface of the article 10, 20, 25 made of a thermoplastic resin, and the high temperature members 5, 28 are formed on the article 11, 21, 27 to be joined. Through the through holes 12, 22, 29, the heat causes the bonded article 1
A joining method for joining the articles 10, 20, 25 and the articles 11, 21, 27 by piercing the articles 0, 20, 25 while melting them.

In such a structure, the article to be bonded 1
1, 21, 27 through holes 12, 22, 29 in the high temperature member 5,
It is possible to join the articles to be joined 10, 20, 25 and the articles to be joined 11, 21, 27 by a simple operation of inserting 28 and further penetrating the articles 10, 20, 25.
Therefore, an adhesive material as a joining medium becomes unnecessary. (2) The article 17 to be joined is sandwiched between a plurality of articles 15 and 16 made of a thermoplastic resin, and the high temperature member 5 is inserted from the article 15 on one outer side through a through hole 18 formed in the article 17 to be joined. To the outer joint 16 on the other side due to the heat
The bonded article 1 is formed by piercing 5 and 16 while melting them.
A joining method for joining 5, 16 and the article 17 to be joined.

In such a structure, the high temperature member 5 is joined from the one outer joint 15 to the other outer joint 16 through the through hole 18 formed in the article 17 by the heat. The objects to be joined 15 and 16 and the article to be joined 17 can be joined together by a simple operation of piercing the articles 15 and 16 while melting them. Therefore, an adhesive material as a joining medium becomes unnecessary. (3) The joining method according to the technical idea (1) or (2), wherein the articles 11, 17, and 27 to be joined are woven or knitted articles using yarns.

In such a structure, the article to be bonded 1
Since 1, 17, and 27 are woven and knitted articles using yarns, the high temperature members 5, 15, 16, and 25 are heated by the high temperature members 5 and 28 penetrating the joined objects 10, 15, 16, and 25. The melted thermoplastic resin rises on the insertion side of the members 5 and 28. Then, the article to be joined 1 placed on the insertion side
The melted thermoplastic resin is impregnated between the yarns 1, 17, and 27 to be solidified, and the objects to be joined 10, 15, 16, 25 and the objects to be joined 11, 17, 27 are firmly joined. (4) The joining method according to the technical idea (1) or (2), wherein the article to be joined 21 is a plate material having rigidity.

In such a structure, since the article to be joined is the plate member 21 having rigidity, the thermoplastic resin melted on the insertion side of the high temperature member 5 rises in the through hole 22, and the plate member 21 has rigidity. Therefore, it does not soak into the plate material 21 and is eluted and solidified on the upper surface of the article 22 to be joined. As a result, the article to be joined 21 is sandwiched and joined between the elution portion 401 and the article 20 to be joined. (5) A method of joining the back cloth 27 to the back surface of the pad 25 having a shape along the breast, which is needle-like through the stitches 29 of the back cloth 27 positioned on the back surface of the pad 25 made of a thermoplastic elastomer. The method of joining the pad 25 and the back cloth 27 by penetrating the pad 25 with the high temperature member 28.

In this way, the back cloth 27 can be joined to the pad 25 without using an adhesive. (6) A method of joining the pad 25 and the backing cloth 27 by penetrating the high temperature member 28 a plurality of times in the technical idea (5) other than the above claims.

In this way, as a result of joining, the through holes 30 formed also serve as ventilation holes, and the air permeability of the pad 25 is improved. (7) A pad 25 in which a back cloth 27 is joined by a joining method according to the technical idea (5) or (6) other than the claims.

By doing so, the pad 2 having good breathability can be obtained.
5 is obtained, and since no adhesive is used, there is no fear of being stiff or soiling the cloth surface.

[0055]

As described above in detail, according to the first aspect of the invention, the hole can be formed in the object to be processed by a simple operation of piercing the high temperature member, and the opening edge of the obtained hole can be formed. The resin melted in the portion does not rise and become thick, and the strength of the edge portion does not deteriorate.

According to the invention of claim 2, when the high temperature member is pierced through the workpiece, the thermoplastic resin is instantly melted,
It expands and rises at the opening edge of the hole, so that the hole can be quickly formed.

According to the third aspect of the invention, even if a plurality of holes are formed, the resin swells up at the edge of the opening to increase the thickness and suppress the decrease in strength. Even if a tensile force is applied to the net body, its durability is improved.

According to the invention of claim 4, the article to be joined can be easily joined to the article.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment embodying a method for punching holes according to the present invention, and is a perspective view showing the vicinity of a through hole in a broken manner.

FIG. 2 is a perspective view showing a net body formed by forming a plurality of through holes in a sheet material.

FIG. 3 is a cross-sectional view of a sheet material, showing a punching step.

FIG. 4 is a view showing a state in which the penetrating member melts the sheet material, and is a cross-sectional view of the sheet material.

FIG. 5 is a view showing a state in which the penetrating member penetrates the sheet material, and is a cross-sectional view of the sheet material.

FIG. 6 is a view showing a second embodiment of the present invention and is a cross-sectional view showing a state in which a cloth is placed on a sheet material.

FIG. 7 is a cross-sectional view showing a state in which a penetrating member is inserted into a through hole of cloth.

FIG. 8 is a cross-sectional view showing a state where a penetrating member penetrates a sheet material.

FIG. 9 is a view showing a state in which a sheet material and a cloth are joined together, and is a perspective view in which a main part is broken.

FIG. 10 is a view showing a third embodiment and is a cross-sectional view showing a state in which cloth is arranged between upper and lower sheet materials.

FIG. 11 is a cross-sectional view showing a state where the penetrating member penetrates the upper sheet material.

FIG. 12 is a cross-sectional view showing a state where the penetrating member penetrates the upper and lower sheet materials.

FIG. 13 is a diagram showing a state in which upper and lower sheet materials and cloth are joined together, and is a perspective view in which a main part is broken.

FIG. 14 is a view showing a fourth embodiment and is a cross-sectional view showing a state in which a plate material is placed on a sheet material.

FIG. 15 is a cross-sectional view showing a state in which the penetrating member melts the sheet material through the through hole of the plate material.

FIG. 16 is a cross-sectional view showing a state where the penetrating member penetrates the sheet material.

FIG. 17 is a perspective view showing a state in which a sheet material and a plate material are joined together.

FIG. 18 is a view showing a fifth embodiment and is a front view showing a brassiere pad.

19 is a sectional view taken along the line AA in FIG. 18, showing a partially enlarged view in a circle.

FIG. 20 is a perspective view showing a conventional net body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet material as a to-be-processed object, 2 ... Through hole as a hole, 5 ... Penetrating member as a high temperature member, 10 ... Sheet material as a joined object, 11 ... Cloth as an article to be joined, 15 ... As a joined article Upper sheet material, 16 ... lower sheet material as a joined object, 17 ... cloth as an article to be joined, 20 ... sheet material as an article to be joined, 21 ... plate material as an article to be joined, 25 ... pad as a article to be joined, 27 ... Cloth as an article to be joined.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area B29K 101: 12 B29L 9:00

Claims (4)

[Claims] 1. A drilling method for forming a hole in a workpiece made of a thermoplastic resin by piercing a high temperature member while melting the hot member due to the heat. 2. The punching method according to claim 1, wherein the high temperature member is set to a temperature around the boiling point of the thermoplastic resin. 3. The drilling method according to claim 1, wherein a plurality of holes are formed such that the outer edge of one hole is in contact with the outer edge of another hole. 4. A joining method for joining an article to be joined to a joined article made of a thermoplastic resin by using the punching method according to claim 1.