JP2008016761A - Holding fixture and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holding fixture which manufactures electronic parts of a uniform quality with high productivity, and to provide a manufacturing method of the holding fixture which manufactures the electronic parts of the uniform quality with high productivity. <P>SOLUTION: The holding fixture 1 includes an elastic member 10 in the state of a flat board where two or more holding holes 11 are formed therethrough, and a core material 20 in the state of a flat board buried in the elastic member 10; and the holding fixture 1 has a strength reinforcing part 13 in a region 12 surrounded by outer tangents which are parallel to the arraying directions of the holding holes 11, and which contact with the holding holes 11 arrayed on an outer-most line. The manufacturing method of the holding fixture inserts the core material having two or more through-holes and a strength reinforcing part forming part in an area where the through-holes are formed to a mold having an extrusion means and a molding pin, injects the elastic material into a gap formed by the mold and the core material to form the elastic material, and extrudes the strength reinforcing part by the extrusion means to release the holding fixture from the mold. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a holding jig and a method for manufacturing the holding jig, and more particularly to a holding jig capable of manufacturing an electronic component of uniform quality with high productivity and a method for manufacturing the holding jig.

  Electronic components used in portable devices such as computers, digital video camera related devices, digital still camera related devices, compact disc related devices, mini disc related devices, digital versatile disc (DVD) related devices, mobile communication related devices, For example, the inductor or the like is mounted on a printed circuit board or the like, and is mounted on a portable device or the like as a component or the like of the oscillation circuit. For example, an inductor is generally mounted on a portable device or the like by forming an internal electrode on an electronic component member by electroless plating or the like, winding a coil, and further forming an external electrode or the like as desired.

  Since such an electronic component is usually small, in order to achieve both productivity and homogeneity of the manufactured product, the electronic component is manufactured and transported using a holding jig that holds an electronic component member, or , Preserved etc. As such a holding jig, for example, a holding jig including a flat elastic member formed by penetrating a plurality of holding holes and a flat core material embedded in the elastic member is known. Yes. More specifically, Patent Document 1 states, “(a) A plate body having a large number of parallel through passages is provided. (B) The passage has an elastic wall and a small electrical part is placed in the passage. The position of the passage is smaller than the size of the corresponding part, and the part is elastically gripped at the position in the passage, and includes the configurations (a) and (b). A number of featured devices for coating the ends of small electrical parts are described. In such holding jigs and coating apparatuses, through holes or parallel through passages are usually formed so as to hold hundreds to tens of thousands of electronic component members or small electrical parts.

  These holding jigs and the like are usually larger than the cross-sectional dimension of the electronic component member or electronic component in a mold in which a plurality of molding pins are formed at positions corresponding to the positions of the holding holes formed in the elastic member. A core material formed by arranging a plurality of through holes having a diameter is inserted so that the molding pin is positioned in the through hole of the core material, and then inserted into a gap formed by the mold and the core material. It is manufactured by a manufacturing method in which an elastic material such as rubber is injected and molded (see, for example, Patent Document 2). In this manufacturing method, for example, as shown in FIG. 12, when holding the edge 43 of the holding jig 41 and releasing the holding jig 41 from the mold 40, a plurality of molding pins 34 are formed. Due to the extraction force generated when the elastic member 10 is extracted, the molding pin 34 located near the center of the core material 42 is more difficult to extract than the molding pin 34 located near the edge of the core material 42, and as a result, the core material 42 may be deformed or damaged. Therefore, in order to prevent deformation or breakage of the core material, it is necessary to increase the thickness of the core material and / or reduce the diameter of the through hole formed in the core material to maintain the strength of the core material. is there. However, if the thickness of the core material is increased, the mass of the holding jig is increased and the handleability of the holding jig is reduced. On the other hand, if the diameter of the through hole is reduced, the electronic component member is attached to the holding jig. The workability at the time of inserting and holding decreases, and the insertion force and the extraction force more than necessary act to easily break the elastic member. Therefore, the conventional holding jig has ensured the strength of the core material, the workability and the damage prevention property of the elastic member by forming a thick core material with a material such as a metal having strong strength. .

  However, in recent years, demand for electronic components has been increasing, and therefore, it is desired to improve productivity in manufacturing electronic components. As a method for realizing such a demand, for example, it is possible to manufacture with one holding jig by increasing the size of the holding jig and / or increasing the number of holding holes formed in the holding jig. And a method for increasing the number of electronic components.

  However, when the number of electronic components that can be manufactured with one holding jig is increased, the strength of the core member that holds the elastic member smoothly decreases due to the increase in size and / or the number of through holes. When the holding jig is manufactured by the manufacturing method using the core material having such reduced strength, the edge portion 43 of the holding jig 41 is gripped and held from the mold 40 as shown in FIG. When the jig 41 is released, the extraction force generated when the plurality of molding pins 34 are extracted from the elastic member 10 becomes strong, and the low-strength core material 42 is deformed or damaged, and the holding jig 41 is smoothed. May be impaired. If the smoothness of the holding jig is impaired, it is not possible to insert and hold almost all of the predetermined number of electronic member parts in the holding jig at the same time, and the predetermined number of electronic parts are manufactured with high productivity. On the other hand, even if almost all of the predetermined number of electronic component parts can be inserted and held together in the holding jig, it becomes impossible to manufacture electronic parts of uniform quality There is.

Japanese Examined Patent Publication No. 62-20585 Paragraph No. 0003 column of Japanese Patent Laid-Open No. 2003-200436

  The present invention solves such conventional problems, provides a holding jig capable of manufacturing electronic parts with uniform quality with high productivity, and produces high-quality electronic parts with uniform quality. It is an object of the present invention to provide a method for manufacturing a holding jig that can be manufactured with good performance.

As means for solving the problems,
Claim 1 comprises a flat elastic member formed by penetrating a plurality of holding holes, and a flat core material embedded in the elastic member, parallel to the arrangement direction of the holding holes, and A holding jig having a strength reinforcing portion in a region surrounded by an outer tangent line in contact with the holding holes arranged in the outermost row,
Claim 2 is the holding jig according to claim 1, wherein the strength reinforcing portion has an area of 0.04 to 15% with respect to a virtual surface area of the region.
Claim 3 is the holding jig according to claim 1 or 2, wherein the elastic member is made of silicone rubber.
According to a fourth aspect of the present invention, there is provided a flat core material having a plurality of through holes and a strength reinforcing portion in a region where the through holes are formed. Insert the mold so that the molding pin is positioned in the through hole,
Injecting an elastic material into the gap formed by the mold and the core material, forming the elastic material,
In the manufacturing method of the holding jig, the strength reinforcing portion is extruded by the pushing means, and the holding jig is released from the mold.

  Since the holding jig according to the present invention has the strength reinforcing portion in the region in which the holding hole is formed to penetrate, for example, the core material is enlarged or the number of through holes is increased to improve productivity. Even if the strength of the core material is reduced or the extraction force of the molding pin from the elastic member is strengthened, for example, the thickness of the core material is reduced or the diameter of the through hole is increased. Even if the strength of the core material is reduced, the holding jig can be easily released from the mold while preventing the core material from being deformed or damaged.

  Further, in the method for manufacturing the holding jig according to the present invention, since the strength reinforcing portion is extruded by the extrusion means provided in the mold, even if the strength of the core material is decreased, Even if the extraction force becomes strong, the holding jig can be easily released from the mold while preventing the core material from being deformed or damaged.

  Therefore, according to the present invention, it is possible to provide a holding jig capable of manufacturing an electronic component of uniform quality with high productivity, and to manufacture an electronic component of uniform quality with high productivity. A method for manufacturing a holding jig can be provided.

  A holding jig according to an embodiment of the present invention will be described with reference to the drawings. In addition to the manufacturing method of an electronic component, for example, a manufacturing process such as a step of plating an electronic component member, the holding jig 1 is an electronic component member or an electronic component (in this invention, an electronic component member is an electronic component). In the following, it may be referred to as an electronic component member or the like. The holding jig 1 is particularly advantageously used in a process of plating an electronic component member.

  Here, examples of the electronic component include an inductor, a capacitor, a resistor, and the like. As an electronic component member that is a material of the electronic component, for example, in the case of an inductor, a corner formed of ferrite or the like. Examples include a cylindrical body composed of cylindrical portions such as a columnar shape and a cylindrical shape. The sizes of these electronic component members and the like are adjusted to a desired size according to the portable device to be mounted.

As shown in FIGS. 1 to 3, the holding jig 1 includes a flat plate-like elastic member 10 having a plurality of holding holes 11 formed therethrough, and a flat plate-like core member 20 embedded in the elastic member 10. The outer tangent line L (in FIG. 2, L ₁ , L ₂ , L ₃ and L ₄ ) parallel to the arrangement direction of the holding holes 11 and in contact with the holding holes 11 arranged in the outermost row The strength reinforcing portion 13 is provided in a holding hole assembly region (hereinafter, simply referred to as a region) 12 surrounded by.

  First, the core material 20 and the elastic member 10 constituting the holding jig 1 will be described. The core member 20 is embedded in an elastic member 10 described later, and maintains the elastic member 10 on a flat plate. As shown in FIGS. 4 and 5, the core member 20 has a rectangular flat plate portion 22 in which a plurality of through holes 21 are formed, and protrudes around the flat plate portion 22 in the upper surface direction and the lower surface direction of the flat plate portion 22. The flange portion 23, in other words, the flange portion, and the strength reinforcing portion forming portion 25 are provided in the through hole assembly region 24 in which the through hole 21 is formed.

  The flange portion 23 is formed so as to surround the flat plate portion 22, and the height of the flat plate portion 22 in the upper surface direction and the lower surface direction is adjusted to be the same. In other words, the substantially central portion in the thickness direction of the hook-shaped portion 23 forming a rectangular frame shape is connected by the flat plate portion 22. The hook-shaped portion 23 reinforces the flat plate portion 22 together with the strength reinforcing portion 13 described later, and ensures handling when the holding jig 1 is used.

  As shown in FIGS. 4 and 5, the flat plate portion 22 has a plurality of through holes 21 formed therethrough, for example, about 2000 or more, preferably at least about 3000, more preferably at least about 3500. Have more than one. When the plurality of through holes 21 are formed in the core member 20, the productivity of the electronic component in the electronic component manufacturing method using the holding jig 1 is improved. The through holes 21 are usually drilled in the same pattern as a pattern in which holding holes 11 to be described later are arranged. In the core material 20, the through holes 21 are vertically and horizontally spaced at a predetermined interval in the same manner as the holding holes 11. And arranged in a grid pattern. The arrangement interval of the through holes 21 can be arbitrarily adjusted depending on the size of the electronic component member inserted and held in the holding jig 1, but is preferably adjusted to the same interval as the holding hole 11.

  The cross-sectional shape when the through-hole 21 is cut in a horizontal plane is not particularly limited. For example, a circular shape, an elliptical shape, a rectangular shape, a polygonal shape, or the like can be arbitrarily selected, but an electronic component member or the like is inserted. It is particularly preferable that the holding hole 11 is formed in the same shape as the cross-sectional shape in terms of excellent workability when held. In the core material 20, as shown in FIG. 4, the cross-sectional shape of the through hole 21 is substantially circular.

  The inner diameter of the through hole 21 can be arbitrarily adjusted according to the size of the electronic component member and the holding hole 11, the number of the through holes 21 to be formed, and the like, preferably from the inner diameter of the holding hole 11. And the inner diameter is adjusted so that an electronic component member or the like can be easily inserted into and removed from the holding hole 11. For example, the inner diameter of the through hole 21 is adjusted to about 2 to 9 times the diameter or side width of the cylindrical portion inserted into the holding hole 11 in the electronic component member or the like. As shown in FIG. 5, the through hole 21 has a substantially uniform inner diameter in the vertical cross section of the through hole 21. The inner diameter of the through hole 21 includes not only the case where the through hole 21 has a circular cross section but also the equivalent circle diameter when the through hole 21 has a polygonal cross section.

The flat plate portion 22 is parallel to the arrangement direction of the through holes 21 and is on the outer tangent line L (refer to L ₅ , L ₆ , L ₇ and L in FIG. 4) that contacts the through holes 21 arranged in the outermost row. ₈ ) A through-hole assembly region (hereinafter, simply referred to as a region) 24 surrounded by ( ₈ ). This region 24 may be formed on the entire flat plate portion 22, or may be formed inside the flat plate portion 22 as shown in FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, the region 24 has a strength reinforcing portion forming portion 25 that forms the strength reinforcing portion 13 when the holding jig 1 is used. As shown in FIG. 4, the strength reinforcing portion forming portion 25 is a substantially central portion of the core material 20 in the short side direction, and divides the length of the core material 20 in the long side direction into approximately three equal parts. Two pieces are formed at positions so as to be symmetrical in the short side direction and the long side direction of the core member 20. As shown in FIG. 5, the strength reinforcing portion forming portion 25 is a convex body projecting in the upper surface direction and the lower surface direction of the flat plate portion 22 from the through hole non-formed region 26 where the through hole 21 is not formed. Specifically, it forms a quadrangular prism, and its height (thickness) is adjusted to the same height (thickness) as that of the bowl-shaped portion 23. When the flat plate portion 22 has the strength reinforcing portion forming portion 25, even if the strength of the core material 20 is reduced by increasing the number of electronic component members that can be inserted and held in one holding jig. The core material 20 and the holding jig 1 can be prevented from being deformed or broken, and as a result, high productivity and smoothness can be realized when the holding jig 1 is used. Further, even if the core material 20 is formed thin, the core material 20 can be prevented from being deformed and damaged, and also when the electronic component member or the like is inserted into and held in the holding jig 1. It is possible to prevent the tool 1 from being deformed or damaged, and as a result, the workability of the holding jig 1 is improved.

  The strength reinforcing portion forming portion 25 preferably has a total area of 0.04 to 15% with respect to the area of the flat plate portion 22. When the strength reinforcing portion forming portion 25 has an area in this range, the core material 20 and the holding jig 1 are effectively prevented from being deformed or damaged, and high smoothness when the holding jig 1 is used is maintained. In addition, the number of the through holes 21 can be greatly reduced, and the high productivity of the electronic component when the holding jig 1 is used is not impaired. Can be manufactured. The strength reinforcing portion forming portion 25 is 0.05 to 10% with respect to the area of the flat plate portion 22 in that an electronic component having extremely uniform quality can be manufactured with higher productivity. More preferred is 0.1 to 7%.

  As shown in FIGS. 4 and 5, when the through-hole assembly region 24 is formed inside the flat plate portion 22, the total area of the strength reinforcing portion forming portion 25 is the virtual surface area of the region 24. Is preferably 0.04 to 15%. If the strength reinforcing portion forming portion 25 has an area in this range, similarly, an electronic component having a uniform quality can be manufactured with high productivity. The strength reinforcing portion forming portion 25 is 0.05 to 10% with respect to the virtual surface area of the region 24 in that an electronic component having extremely uniform quality can be manufactured with higher productivity. More preferred is 0.1 to 7%.

Here, the virtual surface area of the region 24 is the surface area of the region 24 when it is assumed that the through hole 21 is not formed in the region 24 surrounded by the tangents L _{5 to} L ₈ . The area of the strength reinforcing portion forming portion 25 is usually the surface area of the through hole non-formed region 26 where the through hole 21 is not formed, that is, in the core material 20, the convex body in the strength reinforcing portion forming portion 25. The surface area of the top surface may be a surface area of a region surrounded by a tangent line (not shown in FIG. 4) that contacts the through holes 21 arranged in the nearest row from the through hole non-formed region 26 in some cases. Can do.

  The core member 20 is formed with a flange-like portion 23, a flat plate portion 22, and a through hole non-formed region 26 in consideration of productivity of the electronic component member, the length of the electronic component member, the strength of the holding jig 1, and the like. Is adjusted in size and thickness.

  The core material 20 should just be formed with the material which can maintain the elastic member 10 in a smooth shape, A metal, resin, etc. are mentioned as such a material. Specifically, examples of the metal include stainless steel, carbon steel, aluminum alloy, nickel alloy, and examples of the resin include polyester, polytetrafluoroethylene, polyimide, polyphenylene sulfide, polyamide, polycarbonate, polystyrene, polypropylene, and polyethylene. , And polyvinyl chloride. The core material 20 is preferably formed of stainless steel, an aluminum alloy, a polyphenylene sulfide resin, or the like from the viewpoint of workability and operability, and is an aluminum alloy in that both strength and lightness can be achieved at a high level. Is particularly good.

  As shown in FIGS. 1 to 3, the elastic member 10 has a flat plate shape having a plurality of holding holes 11 formed therethrough. More specifically, as shown in FIG. 3, the elastic member 10 embeds the core material 20, specifically, the flat plate portion 22 of the core material 20, in other words, the flat plate portion 22 of the core material 20. Are formed so as to penetrate the through hole 21 of the core member 20 and be flush with the flange-like portion 23 and the strength reinforcing portion forming portion 25 of the core member 20. In other words, the elastic member 10 is disposed on both surfaces of the core member 20, and the elastic member 10 disposed on both surfaces is integrally formed by penetrating into the through hole 21 of the core member 20. When the elastic member 10 is formed in this manner, there is an advantage that the adhesiveness between the elastic member 10 and the core member 20 is excellent, and insertion and extraction of the electronic component member and the like are facilitated.

  As shown in FIGS. 1 to 3, the elastic member 10 is surrounded by the flat plate portion 22 of the core member 20, that is, the flange portion 23 of the core member 20, and excludes the strength reinforcing portion forming portion 25. It is arranged in the part. The elastic member 10 has two rectangular openings 14 corresponding to the strength reinforcing portion forming portion 25 at a position substantially at the center in the short side direction and a length in the long side direction. is doing.

  As shown in FIGS. 1 to 3, the elastic member 10 has a plurality of holding holes 11 for inserting and holding, preferably penetrating and holding members for electronic components, etc., and inserted into the holding hole 11, preferably inserted. Holds components for electronic parts. As shown in FIGS. 1 and 2, the elastic member 10 has a plurality of holding holes 11, for example, about 2000 or more, preferably at least about 3000 or more, more preferably at least about 3500 or more. When a plurality of holding holes 11 are formed in the elastic member 10, a large number of electronic component members and the like can be easily inserted into the holding holes 11 of the elastic member 10, and can be easily extracted from the holding holes 11. Productivity is improved.

  As shown in FIGS. 1 to 3, the holding holes 11 are arranged in a grid pattern at predetermined intervals in the vertical and horizontal directions. The arrangement interval of the holding holes 11 can be arbitrarily adjusted depending on the size of the electronic component member to be inserted and held in the holding jig 1. Preferably, the arrangement interval is high enough to achieve high production efficiency. Adjusted to the interval. For example, the arrangement interval of the holding holes 11 is adjusted to about 3 to 10 times the diameter or width of the portion inserted and held in the holding hole 11 in the electronic component member or the like.

  The cross-sectional shape when the holding hole 11 is cut along a horizontal plane is not particularly limited. For example, a circular shape, an elliptical shape, a rectangular shape, a polygonal shape, or the like can be arbitrarily selected. From the standpoint of superiority, the cross-sectional shape of the portion inserted and held in the holding hole 11 in the electronic component member or the like is preferably formed. In the elastic member 1, as shown in FIGS. 1 and 2, the cross-sectional shape of the holding hole 11 is substantially circular.

  The inner diameter of the holding hole 11 can be arbitrarily adjusted in accordance with the size of the electronic component member or the like, the number of the holding holes 11 to be formed, and the like. For example, the inner diameter of the holding hole 11 is adjusted to about 0.5 to 1.3 times the diameter or width of the portion inserted and held in the holding hole 11 in the electronic component member or the like. As shown in FIG. 3, the holding hole 11 has substantially the same inner diameter in the vertical cross section (axial cross section) of the holding hole 11, but the inner diameter gradually decreases from the substantially central portion toward the end opening. It may be formed as follows. The inner diameter of the holding hole 11 includes not only the case where the holding hole 11 has a circular cross section but also the equivalent circle diameter when the holding hole 11 has a polygonal cross section.

  The elastic member 10 is usually formed with the flange-like portion 23 and the strength reinforcing portion forming portion 25 in consideration of the productivity of the electronic component member, the length of the electronic component member, the thickness of the core member 20, and the like. The size and thickness are adjusted to be flush.

  The elastic member 10 preferably has a predetermined elongation, tensile strength, and hardness so as to be elastically deformed and not damaged when an electronic component member or the like is inserted and / or removed. For example, the elongation at break (tensile speed 500 mm / min) specified in JIS K6249 is preferably 200 to 1000%, particularly preferably 400 to 900%, and the tensile strength (tensile specified in JIS K6249). The speed (500 mm / min) is preferably 5 to 15 MPa, particularly preferably 7 to 14 MPa, and the hardness (JIS A) defined in JIS K6253 is preferably 20 to 80, and 40 to 60 Is particularly preferred.

  Since the holding jig 1 is used in the electronic component manufacturing method, for example, the plating process of the electronic component member, the surface of the elastic member 10 achieves product homogeneity, and the surface of the elastic member 10 is plated. In order not to be equal, it is preferably smooth and more preferably a mirror surface. In order to make the surface of the elastic member 10 a mirror surface, a method of molding the elastic member 10 using a mold having an inner surface as a mirror surface, a method of polishing or grinding the surface after molding in accordance with a conventional method, and the like are selected. That's fine.

  The elastic member 10 only needs to be formed of a material that can be elastically deformed to insert and hold an electronic component member or the like. Examples of such a material include rubber and elastomer. Specific examples include silicone rubber. Among silicone rubbers, a silicone rubber obtained by crosslinking a linear polydimethylsiloxane having a high polymerization degree or a copolymer thereof to impart rubber elasticity, or an acid-resistant silicone rubber is preferable. As silicone rubber which bridge | crosslinked linear polydimethylsiloxane of high polymerization degree, a brand name "KE-1950-50" (made by Shin-Etsu Chemical Co., Ltd.) etc. can be obtained, for example.

The holding jig 1 including the core member 20 and the elastic member 10 disposed on the flat plate portion 22 is parallel to the arrangement direction of the holding holes 11 as shown in FIGS. In addition, a holding hole assembly region (hereinafter simply referred to as a region) surrounded by an outer tangent line L (L ₁ , L ₂ , L _3, and L ₄ in FIG. 2) that contacts the holding holes 11 arranged in the outermost row. In the region 12, the short side direction and the long side in the region 12 are located at approximately the center in the short side direction in the region 12 and the position in which the length in the long side direction in the region 12 is divided into approximately three equal parts. Two strength reinforcing portions 13 are provided so as to be symmetrical in the side direction. If the holding jig 1 has the strength reinforcing portion 13 in the holding hole assembly region 12, the core described later is increased by increasing the number of electronic component members that can be inserted and held in one holding jig. Even if the strength of the material 20 is reduced, the strength of the holding jig 1 is reinforced, so that it is possible to prevent the holding jig 1 from being deformed or damaged. And high smoothness can be maintained. Even if the core material 20 is formed thin, the core material 20 and the holding jig 1 can be prevented from being deformed and damaged, and an electronic component member or the like is inserted and held in the holding jig 1. At this time, it is possible to prevent the holding jig 1 from being deformed or damaged, and as a result, the workability of the holding jig 1 is improved.

  As clearly shown in FIG. 3, the strength reinforcing portion 13 in the holding jig 1 is integrally formed in the through hole non-formed region 26 of the flat plate portion 22 and is not embedded in the elastic member 10. That is, the strength reinforcing portion forming portion 25 of the core material 20 constitutes the strength reinforcing portion 13. Therefore, as shown in FIG. 3, the holding jig 1 is provided around the elastic member 10 disposed on the flat plate portion 22, the strength reinforcing portion 13 not embedded in the elastic member 10, and the flat plate portion 22. The provided hook-like portion 23 is flush with the provided hook-like portion 23.

  The total area of the strength reinforcing portion 13 is 0.04 to 15% with respect to the total area of the elastic member 10 and the strength reinforcing portion 13, that is, the area of the flat plate portion 22 on which the elastic member 10 is disposed. Preferably there is. When the strength reinforcing portion 13 has an area in this range, it is possible to effectively prevent the holding jig 1 from being deformed or damaged, and to maintain high smoothness of the holding jig 1, and to be described later. Since the number of the holding holes 21 formed in the member 10 is not significantly reduced and the high productivity of the electronic component is not impaired, it is possible to manufacture an electronic component having a more uniform quality with high productivity. The strength reinforcing portion 13 is 0.05% to 10% of the total area of the elastic member 10 and the strength reinforcing portion 13 in that an electronic component with extremely uniform quality can be manufactured with higher productivity. It is more preferable that it is 0.1 to 7%.

  As shown in FIGS. 1 to 3, when the holding hole assembly region 12 does not coincide with the edge of the elastic member 10, the strength reinforcing portion 13 has a total area equal to the virtual surface area of the region 12. On the other hand, it is preferably 0.04 to 15%. If the strength reinforcing portion 13 has an area in this range, it is possible to manufacture electronic parts with even more uniform quality with high productivity. The strength reinforcing portion 13 is more preferably 0.05 to 10% with respect to the virtual surface area of the region 12 in that an electronic component having extremely uniform quality can be manufactured with higher productivity. 0.1 to 7% is particularly preferable.

Here, the virtual surface area of the region 12 is formed with the holding hole 11 in the region 12 (including the strength reinforcing portion 13 as clearly shown in FIG. 2) surrounded by the tangents L _{1 to} L ₄ . It is the surface area of the region 12 when it is assumed that it is not. Further, the area of the strength reinforcing portion 13 is usually the surface area of the region where the holding hole 11 is not formed, and the holding jig 1 is the surface area of the strength reinforcing portion 13. The surface area of the region surrounded by the tangent line (not shown in FIG. 4) in contact with the through holes 21 arranged in the nearest row from the through hole non-formed region 26 can be used.

  As shown in FIG. 3, the holding jig 1 is preferably formed so that the central axis of the through hole 21 and the central axis of the holding hole 11 are aligned so that the holding hole 11 penetrates the through hole 21. The elastic member 10 covers the core member 20 so as to penetrate the through hole 21, and the core member 20 is embedded in the elastic member 10. When the core member 20 is embedded in the elastic member 10 in this way, the elastic member 10 can be prevented from being damaged, and an electronic component member or the like can be easily inserted into the holding hole 11 of the holding jig 1, It can be easily removed from the holding hole 11.

  The size and thickness of the holding jig 1 are adjusted in consideration of the productivity of the electronic component member, the length of the electronic component member, and the like. The thickness of the elastic member 10 is preferably 1.0 to 30 times the length of the portion inserted and held in the holding hole 11 such as the electronic component member. More specifically, an example of the dimensions of the holding jig 1 is, for example, a size of 260 to 300 mm in length, 160 to 200 mm in width, and a thickness of 7.0 to 10.0 mm.

  The holding jig 1 or the core material 20 only needs to have a strength capable of maintaining the smoothness of the holding jig 1. For example, the deflection amount measured by the following measurement method is 5 mm or less. preferable. When the holding jig 1 or the core material 20 has a deflection amount within this range, when the holding jig 1 is manufactured, the holding jig 1 or the core material 20 is prevented from being deformed or damaged. The holding jig can be easily released from the mold. The deflection amount of the holding jig 1 or the core material 20 is more preferably 4 mm or less, and particularly preferably 3 mm or less.

  The amount of deflection is measured as follows. In measuring the strength of the holding jig 1 or the core material 20, a frame (test body mounting member) having the same shape and the same dimensions as the bowl-shaped portion 23 and a cylindrical shape having a diameter of 25 mm and a height of 15 mm were formed. A contact made of stainless steel (SUS304) is prepared. The core material 20 is placed and fixed on the specimen mounting member. Next, a contactor is placed in a substantially central part of the core material 20 and is mounted on a Tensilon testing machine (Orientec Co., Ltd., trade name “RTM-100”). The load cell (Orientec Co., Ltd., trade name “TLB-500L”) -FB1 ") is lowered, and after the load cell comes into contact with the contact, the load cell is read from the Tensilon tester when a load of 1 kN is applied to the contact in the direction perpendicular to the core member 20. This operation is performed using a plurality of core materials 20, and a plurality of obtained loads are arithmetically averaged, and the obtained average value is set as a deflection amount of the core material 20.

As shown in FIG. 6, the holding jig 2 according to another embodiment of the present invention includes two elastic members 10 each having a flat plate shape formed by penetrating a plurality of holding holes 11, and the elastic members 10. And an outer tangent L (refer to L _{11 in} FIG. 6) parallel to the arrangement direction of the holding holes 11 and in contact with the holding holes 11 arranged in the outermost row. , L ₁₂ , L _13, and L ₁₄ ), the strength reinforcing portion 13 is provided in the holding hole assembly region 12 surrounded by L.

Here, the outermost row of the holding holes 11 does not mean the outermost row in each elastic member 10, but the holding jig 1 includes a plurality of elastic members 10 as shown in FIG. 6. Does not include the outermost row of holding holes 11 on the side where the plurality of elastic members 10 are opposed to each other, and it is assumed that the plurality of elastic members 10 form one elastic member 10. The outermost row. That is, the holding jig 2 does not include the outermost rows 11e and 11f of the holding holes 11 on the opposite sides of the two elastic members 10, and the two elastic members 10 form one rectangular elastic member. The outermost rows 11 a, 11 b, 11 c, and 11 d of the holding holes 11 when it is assumed. That is, in the holding jig 2, the holding hole assembly region 12 includes the regions surrounded by the tangents L ₁₁ , L ₁₂ , L _13, and L ₁₅ and the tangents L ₁₁ , L ₁₂ , L _{14 in} each elastic member 10. And the area surrounded by the outer tangent lines L ₁₁ , L ₁₂ , L ₁₃ and L ₁₄ which are in contact with the outermost rows 11a, 11b, 11c and 11d of the holding holes 11, respectively, instead of the total area of the areas surrounded by L ₁₆ and L ₁₆ It is.

  The holding jig 2 extends in the short side direction of the core member 20 from the substantially central portion of one hook-shaped portion 23 in the long direction of the core material 20 to the substantially central portion of the other hook-shaped portion 23. 13 is the same as the holding jig 1 except that the elastic member 10 is equally divided in the long side direction.

  As shown in FIG. 7, a holding jig 3 according to another embodiment of the present invention includes four elastic members 10 each having a flat plate shape in which a plurality of holding holes 11 are formed, and the elastic members. 10 and an outer tangent L (shown in FIG. 7) parallel to the arrangement direction of the holding holes 11 and in contact with the holding holes 11 arranged in the outermost row. The strength reinforcing portion 13 is provided in the holding hole assembly region 12 surrounded by (No).

  Here, the outermost row of the holding holes 11 is the same as the outermost row of the holding holes 11 in the holding jig 2, and in the holding jig 3, the four elastic members 10 are positioned on opposite sides. The outermost row of the holding holes 11 is assumed when it is assumed that the four elastic members 10 form one rectangular elastic member without including the outermost row of the holding holes 11.

  The holding jig 3 is the same as the holding jig 1 except that two strength reinforcing portions 13 extending diagonally between two opposing corner portions divide the elastic member 10 into four. is there.

  As shown in FIG. 8, a holding jig 4 according to another embodiment of the present invention includes a flat plate-like elastic member 10 having a plurality of holding holes 11 formed therethrough, and embedded in the elastic member 10. The outer tangent L (not shown in FIG. 8) that is parallel to the arrangement direction of the holding holes 11 and is in contact with the holding holes 11 arranged in the outermost row. The strength reinforcing portion 13 is provided in the holding hole assembly region 12 surrounded by.

  The holding jig 4 is substantially the same as the above except that one strength reinforcing portion 13 is formed by the strength reinforcing portion forming portion 25 of the core member 20 and the elastic member 10 disposed on both surfaces thereof. The same as the holding jig 1. In other words, the holding jig 4 is located at a through hole assembly region (not shown in FIG. 8) through which a through hole (not shown in FIG. 8) is formed, and at a substantially central portion in the through hole assembly region. The core member 20 is provided with a through hole non-formed region where the through hole is not formed, that is, a flat plate portion having the strength reinforcing portion forming portion 25 and a hook-like portion 23 formed around the flat plate portion. The entire flat plate portion of the core member 20 is covered with the elastic member 10, and the entire flat plate portion is embedded in the elastic member 10.

  As described above, the plate-like elastic member 10 formed by penetrating the plurality of holding holes 11 and the plate-like core member 20 embedded in the elastic member 10 are provided, and the arrangement direction of the holding holes 11 is provided. The holding jigs 1 to 4 having the strength reinforcing portions 13 in the region 12 surrounded by the outer tangent line that is parallel to the outermost row and in contact with the holding holes 11 arranged in the outermost row are electronic components of uniform quality. It can be manufactured with high productivity.

  The holding jig in the present invention is not limited to the above-described embodiments, and various modifications can be made as long as the object of the present invention can be achieved. For example, in the holding jigs 1 to 4, as shown in FIGS. 1 to 8, the strength reinforcing portion 13 is flush with the elastic member 10 and the hook-like portion 23. The reinforcing portion may not be flush with the elastic member and the hook-shaped portion. For example, the reinforcing portion may protrude from the elastic member and the hook-shaped portion or may be depressed.

  Moreover, in the holding jigs 1 and 4, as shown in FIG. 1 to FIG. 3 and FIG. 8, the strength reinforcing portion 13 is formed in a rectangular shape, but in this invention, the strength reinforcing portion has a shape of The shape is not particularly limited, and the shape may be a circle, an ellipse, a polygon, a streamline, or the like, and the number is not particularly limited, and is adjusted to an arbitrary number.

  In the holding jigs 2 and 3, as shown in FIGS. 6 and 7, the strength reinforcing portion 13 extends so as to connect the opposing hook-like portions 23 or corner portions. The strength reinforcing portion does not need to extend so as to connect the opposite hook-shaped portions or corner portions, and may extend in pieces. In the holding jig 2, as shown in FIG. 6, the strength / strength reinforcing portion 13 extends one so as to connect the opposing hook-shaped portions 23. May extend two or more, and a plurality of strength reinforcing portions may intersect, for example, in a lattice shape. Furthermore, in the holding jig 3, as shown in FIG. 7, the two strength reinforcing portions 13 extend so as to connect the opposite corner portions. In the present invention, the strength reinforcing portions face each other. Only one may extend so as to connect the corners.

  In the holding jigs 1 and 4, as shown in FIGS. 1 to 3 and 8, the strength reinforcing portion 13 is formed in an island shape in the elastic member 10, and in the holding jigs 2 and 3, As shown in FIG. 7, the strength reinforcing portion 13 is formed so as to connect the opposite flange portions 23 or corner portions, but in the present invention, the strength reinforcing portion may be arbitrarily combined. For example, in the holding jig 2, a rectangular core material in the holding jig may be formed at a substantially central portion of each elastic member. In the present invention, the strength reinforcing portion is preferably formed in an island shape in the elastic member in that an electronic component of uniform quality can be manufactured with high productivity.

  In the holding jigs 1 to 4, as shown in FIGS. 1 to 8, the core member 20 has a hook-like portion 23 formed around the flat plate portion 22. It is not necessary to be formed around the flat plate portion, and may not be formed, or may be formed on at least one side of the flat plate portion.

  In the holding jigs 1 to 4, as shown in FIGS. 1 to 5, the core material 20 is formed with the same number of through holes 21 having the same arrangement as the holding holes 21 of the elastic member 10. However, in the present invention, the through holes may be arranged in a shape different from the holding holes, and the through holes do not have to be formed in the same number corresponding to the holding holes on a one-to-one basis. The plurality of holding holes may be formed larger than the holding holes so as to be penetrated therein, or may be formed in a lattice shape or a mesh shape.

  In the holding jigs 1 to 4, the holding jigs 1 to 4 and the core material 20 are substantially rectangular as shown in FIGS. 1 to 8. It is not necessary to form a rectangle, and for example, a square, a polygon, or the like may be formed.

  In the holding jigs 1 to 4, the through holes 21 of the core member 20 and the holding holes 11 of the elastic member 10 are both arranged in a grid pattern. In the present invention, the arrangement of the through holes and the holding holes is a grid pattern. There is no need to arrange in a grid, for example, a honeycomb arrangement in which regular hexagons are arranged in a close-packed manner, a square arrangement in which the hexagons are rotated 45 degrees and arranged vertically and horizontally, a radial arrangement from one point, a radial curve You may arrange according to the arrangement | sequence of a shape, the arrangement | sequence of a concentric shape, the arrangement | sequence of the spiral shape made into a spiral form from one point, etc.

  The holding jigs 1 to 4 are manufactured by the above-described normal manufacturing method, but the holding jig can be easily released from the mold while preventing the core material 20 from being deformed or damaged. Then, a plurality of through-holes 21 are formed to penetrate, and a flat core material 20 having a strength reinforcing portion forming portion 25 in the through-hole assembly region 24 in which the through-holes 21 are formed is extruded. A gap formed by the mold 30 and the core member 20 is inserted into a mold 30 having means 33 and a plurality of molding pins 34 so that the molding pin 34 is positioned in the through hole 21. It is manufactured by a manufacturing method in which an elastic material is injected into 35, an elastic material is molded, the strength reinforcing portion 13 is extruded by the pushing means 33, and the holding jig 1 is released from the mold 30. preferable. Hereinafter, this manufacturing method will be described using the holding jig 1 as an example.

  In this manufacturing method, first, from a plate-like body made of metal or resin, etc., which is equal to or thicker than the thickness of the bowl-shaped part 23, the flat plate part 22 and the bowl-like part 23 around it are provided, Then, a plurality of through holes 21 are drilled in a predetermined pattern in the flat plate portion 22 by grinding, cutting, file finish or the like, and the strength reinforcing portion forming portion 25, Specifically, the core material 20 is manufactured by forming the through hole non-formed region 26 where the through hole 21 is not formed. Alternatively, the flat plate portion 22 and the flange-shaped portion 23 in which the through hole 21 and the strength reinforcing portion forming portion 25 are formed are separately manufactured, and the flat plate portion 22 and the hook-shaped portion 23 are bonded by a joining means such as welding or adhesion. The core material 20 is produced by bonding to a desired position. The core material 20 thus manufactured may be coated with an adhesive, a primer, or the like on the surface of the core material 20 in order to improve the close contact with the elastic member 10.

  Next, for example, as shown in FIG. 9, the core material 20 manufactured in this way is put into a pair of molds 30 having an extruding means 33 and a plurality of molding pins 34 in the through hole 21. Insert so that the forming pin 34 is positioned. As shown in FIG. 9, the mold 30 has an extrusion means 33 such as an extrusion rod, a piston, and the holding jig 1 at a position corresponding to the position of the strength reinforcing portion forming portion 25 in the core material 20. A lower mold 32 for holding the core material 20, which includes a plurality of molding pins 34 at positions corresponding to the positions of the holding holes formed at the time, and sandwiching the core material 20 together with the lower mold 32. Or the upper mold | die 31 to accommodate is provided. The extruding means 33 is configured such that its upper surface is flush with the inner surface of the lower mold 32 and protrudes from the inner surface of the lower mold 32. The pushing means 33 is provided in the lower mold 32, but may be provided in the upper mold 31. Further, the inner surfaces of the upper mold 31 and the lower mold 32 may each be mirror-finished. When the core material 20 is sandwiched or accommodated in the mold 30, as shown in FIG. 9, the extrusion means 33 is positioned below the strength reinforcing portion forming portion 25 in the core material 20. Each molding pin 34 is located in each through-hole 21, and a gap 35 is formed in a portion where the elastic member 10 is formed by the upper mold 31, the lower mold 32, and the core material 20.

  Next, an elastic material is injected into the gap 35 formed by the mold 30 and the core material 20 to mold the elastic material. The molding method of the elastic material is not particularly limited, and for example, a molding method such as compression molding, injection molding, or transfer molding can be employed. The molding temperature, molding time, and the like may be any temperature and time at which the elastic material to be used is cured and molded, and can be arbitrarily adjusted according to the elastic material.

  After molding the elastic member 10 in this manner, the mold 30 is allowed to cool, and the upper mold 31 is removed as shown in FIG. Next, as shown in FIG. 11, the hook-like portion 23 of the core member 20 is gripped (in FIG. 11, gripping means of the hook-like portion 23, for example, a clamp, a robot arm, etc. are not shown), and a holding jig. 1 is pulled away from the lower mold 32, and the strength reinforcing portion 13 of the holding jig 1 is pressed by the pushing means 33 of the lower mold 32 to release the holding jig 1 from the lower mold 32. At this time, the speed at which the holding jig 1 is pulled away by the gripping means and the speed at which the strength reinforcing portion 13 is pressed by the pushing means 33 are substantially the same, but the core material 20, that is, the holding jig 1 is deformed. Alternatively, it is more preferable in that the holding jig 1 can be easily released from the mold while preventing breakage. Thus, the holding jig 1 can be easily released from the lower mold 32 by extruding the strength reinforcing portion 13 by the extruding means 33.

  The elastic member 10 in the holding jig 1 manufactured in this way may have a molding burr near the opening of the holding hole 11 or the like. Therefore, in order to remove the molding burr, surface treatment such as grinding is performed. It may be done. For example, the surface treatment includes surface grinding, milling, lapping and the like. Further, the surface of the elastic member 10 in the holding jig 1 can be mirror-finished.

  In this manufacturing method, after the elastic member 10 is molded, secondary heating or heat treatment may be performed in order to ensure the hardening of the elastic member 10.

(Example 1)
An aluminum alloy (A7075) having a thickness of 8.9 mm was cut into a rectangular plate having a length of 280 mm and a width of 178 mm. The peripheral part of the cut out plate is made into a bowl-like part having a width of about 11 mm, and the region surrounded by the bowl-like part is ground to a thickness of 5.9 mm, and is about 257 mm long and about 159 mm wide. A flat plate portion (area 408.6 cm ² ) was formed. In addition, a through hole having a diameter of 2.85 mm and 83 rows and 51 rows are formed in the flat plate portion (number of through holes 4071, length about 253 mm, width about 155 mm, area about 392 cm ² ). At the same time, it is symmetrical with respect to the short side direction and the long side direction of the flat plate portion at a position that is substantially the center portion in the horizontal direction of the flat plate portion and that divides the vertical length of the flat plate portion into approximately three equal parts. Then, ^two strength reinforcing portion forming portions having a length and width of 22 mm (area 4.8 cm ² ) were formed, and the core material shown in FIGS. 4 and 5 was produced.

  The extrusion rod provided at a position corresponding to the position of the strength reinforcing portion forming portion in the produced core material, and 4071 moldings provided at positions corresponding to the positions of the holding holes formed when the holding jig is used. A pair of molds shown in FIG. 9 were prepared, which were provided with a lower mold provided with pins (diameter 2 mm) and an upper mold sandwiching the produced core material. The inner surfaces of the upper mold and the lower mold are each mirror-finished.

  Next, the prepared core material was inserted into the prepared pair of molds so that the molding pin was positioned in the through hole, and the mold was provided in the gap formed by the mold and the core material. Silicone rubber (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KE-1950-50”) was injected from the inlet.

Next, the mold is heated at 120 ° C. for 10 minutes, the core material and the silicone rubber are integrally formed, and the core material is embedded in the silicone rubber so that the silicone rubber penetrates into the through hole of the core material. A jig 1 was manufactured. The holding hole assembly area of the elastic member in the holding jig 1 was about 251 mm in length and about 154 mm in width (area of about 386.5 cm ² ). That is, in the holding jig 1, the strength reinforcing portion was 2.4% with respect to the area of the holding hole collecting region, and the strength reinforcing portion forming portion was 2.5% with respect to the area of the through hole collecting region. .

  As the elongation, tensile strength and JIS A hardness of the elastic member thus molded, the silicone rubber forming the elastic member was molded in the same manner, and the rubber test pieces described in JIS K6249 and JIS K6253 were used. Each was prepared, and the elongation at break, tensile strength, and JIS A hardness of the rubber specimen were measured according to the measurement methods described in JIS K6249 (tensile speed: 500 mm / min) and JIS K6253. As a result, elongation at break, tensile strength and JIS A hardness were 600%, 8.8 MPa and 49, respectively. Moreover, the holding jig 1 manufactured in this way was 1.0 mm when the amount of deflection was measured in accordance with the measurement method. Furthermore, the holding jig 1 could be easily removed from the lower mold without being deformed when the holding jig 1 was removed from the lower mold in the manufacturing process. Further, when 4071 ferrites were simultaneously inserted and held in the holding jig 1 and then removed at the same time as one cycle, the holding jig 1 was repeatedly subjected to 50 cycles. Can be reliably inserted and held in the holding jig 1 and can be removed from the holding jig 1.

(Example 2)
An aluminum alloy (A7075) having a thickness of 9 mm was cut into a rectangular plate having a length of 360 mm and a width of 280 mm. A strength reinforcing portion forming portion (length: about 257 mm, area: 25.25 mm) having a width of 15 mm as the peripheral portion of the cut plate and connecting the central portions of the two vertical hooks. 7 cm ² ), and the region surrounded by the hook-shaped portion and the strength reinforcing portion forming portion is ground so that the thickness is 6 mm, and two flat plate portions of 160 mm in length and 260 mm in width (each area 416 cm ² ) Formed. Further, through holes having a diameter of 2.3 mm are formed in each flat plate portion as through-hole assembly portions (number of through-holes 11328) having 96 rows and 118 rows, and the through-holes having two through-hole assembly portions. A gathering region (length of about 327 mm, width of about 257 mm, area of about 840 cm ² ) was formed, and a core material was produced.

Next, in the same manner as in Example 1, a mold suitable for the manufactured core material was prepared, and the core material and silicone rubber were integrally formed to manufacture the holding jig 2. The holding hole assembly area of the elastic member in the holding jig 2 was about 326 mm in length and about 256 mm in width (area of about 834.6 cm ² ). That is, in the holding jig 2, the strength reinforcing portion was 3.1% with respect to the area of the holding hole assembly region, and the strength reinforcing portion forming portion was 3.5% with respect to the area of the through hole assembly region. .

  As the elongation, tensile strength and JIS A hardness of the elastic member thus molded, a rubber test piece was separately prepared in the same manner as in Example 1, and the elongation and tensile strength of the rubber test piece were cut. And JIS A hardness were measured. As a result, elongation at break, tensile strength and JIS A hardness were 600%, 8.8 MPa and 49, respectively. Moreover, the holding jig 2 manufactured in this way was 1.2 mm when the amount of deflection was measured according to the measurement method. Furthermore, the holding jig 2 could be easily removed from the lower mold without being deformed when the holding jig 2 was removed from the lower mold in the manufacturing process. Further, when 11328 ferrites were inserted and held simultaneously in the holding jig 2 and then removed at the same time as one cycle, the holding jig 2 was repeatedly subjected to 50 cycles. Can be reliably inserted and held in the holding jig 2 and can be removed from the holding jig 1.

FIG. 1 is a schematic perspective view showing an example of a holding jig according to an embodiment of the present invention. FIG. 2 is a schematic top view showing an example of a holding jig according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing a part of a cross section of the holding jig cut along line AA in FIG. 2. FIG. 4 is a schematic top view showing an example of a core material in a holding jig according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing a part of the cross section of the core material cut along line BB in FIG. 4. FIG. 6 is a schematic top view showing an example of a holding jig according to another embodiment of the present invention. FIG. 7 is a schematic top view showing an example of a holding jig according to another embodiment of the present invention. FIG. 8 is a schematic top view showing an example of a holding jig which is still another embodiment of the present invention. FIG. 9 is a schematic cross-sectional view showing a state where the core material is inserted into the mold, with a part of the cross section cut by the vertical plane. FIG. 10 is a schematic cross-sectional view showing a state in which the upper mold is removed after the elastic member is molded, with a part of a cross section cut by a vertical surface. FIG. 11 is a schematic cross-sectional view showing a state in the middle of removing the holding jig of the present invention from the lower mold in a manufacturing method of the present invention, with a part of a cross section cut by a vertical surface. FIG. 12 is a schematic cross-sectional view showing a state in the middle of removing the conventional holding jig from the lower mold, with a part of a cross section cut by a vertical surface.

Explanation of symbols

1, 2, 3, 4, 41 Holding jig 10 Elastic member 11 Holding hole 12 Holding hole collecting region 13 Strength reinforcing portion 14 Opening 20, 42 Core material 21 Through hole 22 Flat plate portion 23 Hook-shaped portion 24 Through hole collecting region 25 Strength reinforcement part forming part 26 Through-hole non-formation area 30 Mold 31 Upper mold 32 Lower mold 33 Extruding means 34 Molding pin 35 Gap 40 Mold 43 Edge

Claims (4)

  A flat elastic member formed by penetrating a plurality of holding holes, and a flat core material embedded in the elastic member, parallel to the arrangement direction of the holding holes and arranged in the outermost row The holding jig which has a strength reinforcement part in the area | region enclosed by the outer tangent which touches the holding hole made.   The holding jig according to claim 1, wherein the strength reinforcing portion has an area of 0.04 to 15% with respect to a virtual surface area of the region.   The holding jig according to claim 1, wherein the elastic member is made of silicone rubber. A die having a plate-like core material having a plurality of through-holes formed therein and having a strength reinforcing portion forming portion in a region where the through-holes are formed, and having extrusion means and a plurality of molding pins And inserted so that the molding pin is located in the through hole,
Injecting an elastic material into the gap formed by the mold and the core material, forming the elastic material,
A method for manufacturing a holding jig, comprising: extruding the strength reinforcing portion by the pushing means and releasing the holding jig from a mold.

Images