JPH0764010B2 - Method for manufacturing electronic component storage container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an electronic component storage container for continuously storing electronic components such as various mounting components and precision components without bending the lead frame.

[0002]

2. Description of the Related Art A storage container for electronic parts is generally a sheet made of a thermoplastic resin and is provided with recessed holes for accommodating electronic parts in a continuous manner. As shown in FIGS. 3 (a) and 3 (b), the storage container has a sheet 1 made of a thermoplastic resin, a bottom surface 3 of a recessed hole 2 for fixing an electronic component, and a raised edge 4 around the periphery. A molded product of the rounded convex portion 5 is used. The conventional manufacturing method of the storage container having the recessed hole portion 2 is as follows: (1) A method of manufacturing a recessed hole portion by winding a sheet made of a thermoplastic resin around a rotating drum heated to high temperature and vacuum suction. 63-251197). (2) A method has been proposed in which both sides of a sheet made of a thermoplastic resin are directly heated by a heater and press-molded by a male mold and a female mold to produce a recessed hole (Japanese Patent Laid-Open No. 3-14427).

[0003]

However, when the storage container as shown in FIGS. 3 (a) and 3 (b) is manufactured by the above methods (1) and (2), there are the following problems. (1) In vacuum forming with a rotating drum heated to a high temperature, when the concave hole portion and the convex portion provided on the bottom surface of the concave hole portion are formed at the same time, the width of the edge is set to less than 0.5 mm in the mold structure. It is difficult to achieve, and even if the width is 0.5 mm or more, the thickness of the bottom surface is thin, so it is weak in strength and not suitable for practical use. Further, the mold release after molding is difficult, and the pin is pushed up on the rotating drum itself. Etc. must be installed. (2) With the male and female press molding, it is possible to mold the recessed hole and the protrusion on the bottom of the recessed hole at the same time, but push them up when the molded product is forwarded by a fixed amount. Need a pin. When pushing up the bottom surface with this pin, pressure is applied to the molded product, so it is easily deformed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a female mold in a press molding using a male mold and a female mold.
By using a separate female mold that takes the place of the push-up pin and incorporates independent spring structures, the concave hole and the convex part with an edge provided at the center of the bottom surface are simultaneously molded to form a storage container. It can be transferred in a fixed amount without deformation, which means that it can be heated by heating.
A recessed hole portion made of plastic resin sheet by using a mold, conductive
Convex with a rim that is molded raised prime to secure the child parts
In a method of manufacturing an electronic component storage container having a recessed portion in the center of the bottom surface of the recessed hole , the mold includes a male mold and a female mold, and the male mold is a male mold.
The central part of the mold and the surrounding male part that surrounds it
The female type is a convex type with a concave hole edge corresponding to the male central leg.
Female central leg that forms the part, and a concave hole corresponding to the male peripheral part
Consists female peripheral portion forming the bottom surface parts, a female central leg
Female peripheral portion is for each manufacturing process of the container of the electronic component characterized that you move up and down independently supported by separate springs and gist.

The present invention will be described below with reference to the drawings. Figure 1
Is a conceptual diagram of a mold used in the present invention, (a),
(B) shows a male mold 6. The lower end of the male mold 6 is divided into a male peripheral part 8 and a male central leg 9, and the male peripheral part 8 is shown in FIG.
For molding the bottom surface 3 of the recessed hole portion around the convex portion 5 of the storage container, and the male central leg 9 for molding the bottom surface 10 of the convex portion 5. The central leg 9 is made in one piece.

As shown in FIGS. 1 (c) and 1 (d), the female die 7 comprises a female die peripheral portion 11 and a female die central leg 12, and the female die peripheral portion 11 together with the male die peripheral portion 8 has a recessed hole portion. 2 is formed, the upper end of the female center leg 12 is divided into the edge forming part 13 and the convex forming part 14, but the lower end is integrated, and the former is more than the latter than the edge 4 of the convex part 5 . Between the top surface and the top surface of the bottom surface 10
Only the distance is higher. The female peripheral portion 11 and the female central leg 12 are separate bodies, supported by springs 15 and 16, respectively, and can move up and down independently. Then convex
Gap between the forming portion 14 and the edge forming portion 13 and the edge forming portion 13
Of the side wall of the rim 4 raised in the gap between the female and the female-shaped peripheral portion 11
The slope is decided . A die 17 surrounds the female die 7 to form the rib 18 of the recessed hole portion 2 between the female die peripheral portion 11 and the die 17.
The gap determines the inclination of the side wall of the recessed portion 2 .

Hereinafter, the concept of the process of manufacturing the storage container using the male mold 6 and the female mold 7 will be described with reference to FIGS.
This will be described with reference to (c). As first (a), the edge forming portions 13 of the female type peripheral portion 11 and the female central leg 12 of the female 7
So that the upper surface of the spring is flush with the upper surface of the die 17
Adjust 5,16. This die 17 has a heat on the female die 7.
The heating means coater or the like, from the heated thermoplastic resin
Placing the sheet 1 made.

[0008] As shown in passing FIG 2 (b), lowering the male 6 which is located directly above a female mold, sandwiched sheet 1 between the male peripheral portion 8 and the female peripheral portion 11, the spring 15 is compressed and pushed down until it reaches the predetermined depth of the bottom surface 3 of the recessed hole portion,
The bottom surface 3 of the recessed hole portion is formed . Then, since the female central leg 12 is a separate body from the female peripheral portion 11, the sheet 1 is pushed back by the spring 16, and the sheet 1 is placed on the upper surface of the convex portion forming portion 14 of the female central leg 12 to form the male central leg 9. the against the bottom of the convex portion 5
The surface 10 is molded and the female edge molding 13 is connected to the male central leg 9
By inserting into the gap of the male peripheral portion 8, the edge of the convex portion 5
Mold 4 and stop. In this way, the sheet 1 is cooled and cured after the concave holes are formed by the male mold and the female mold.

Next, as shown in (c), when the male die 6 is raised, the repulsive force of the springs 15 and 16 causes the female die peripheral portion 1 to rebound.
1. The female mold center leg 12 is pushed back to the initial height shown in FIG. 2A, and the molded sheet 1 is released from the female mold . This
In the case of, the female type peripheral portion 11 rises before the female type central leg 12
Therefore, the convex portion 5 of the concave hole portion 2 is not deformed . Here, the sheet 1 is sent by one pitch and the above steps are repeated to continuously manufacture the storage container. Although FIGS. 1 and 2 show an example of one set of male type and female type, if two and three sets are used , a large number of storage containers can be manufactured at one time.
It goes without saying that the work efficiency is significantly improved.

Examples of the thermoplastic resin used for the sheet include polystyrene, polyvinyl chloride resin , polyethylene terephthalate, polycarbonate, polybutylene terephthalate and the like , and these may be used alone.
The sheet may be formed by mixing and using a conductive material. Furthermore
Even if a conductive layer is provided on one or both sides of these sheets,
Good .

[0011]

[Example] HPM1 of pre-hardened steel (Hitachi Metals: H
Using a die with rc hardness 40), male and female dies, and a steel wire with a wire diameter of 0.8 mm wound with a pitch of 4.0 mm and a length of 5 cm, carbon kneaded polyvinyl chloride with a thickness of 300 μm. When a storage container is manufactured from a sheet, the container has been continuously manufactured without being deformed. Same result using a pre-hardened steel Hrc hardness 35, 33 in each mold was obtained.

[0012]

The manufacturing method of the present invention is for storing electronic parts.
Complex with a concave hole, that is, a convex part with an edge in the center of the bottom surface
Shaped recessed holes can be molded at the same time, and since push-up pins are not used, without deforming the electronic component storage container,
It is possible to carry out continuous production by transferring a fixed amount one by one.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a mold used in the present invention, (a)
Is a perspective view of a male type, (b) is a longitudinal sectional view taken along line YY of (a), (c) is a perspective view of a female type, (d) is ZZ of (c).
It is a longitudinal cross-sectional view along a line.

2 (a), (b) and (c) are conceptual explanatory views of steps of the manufacturing method of the present invention.

FIG. 3A is a perspective view of a storage container according to the present invention,
(B) is a longitudinal sectional view taken along line XX of (a).

[Explanation of symbols]

 1 Seat 2 Recessed Hole 3 Bottom of Recessed Hole 4 Edge 5 Convex 6 Male 7 Female 8 Male Peripheral 9 Male Central Leg 10 Bottom of Convex 11 Female Peripheral 12 Female Central Leg 13 Edge Molding part 14 Convex part molding part 15 Spring 16 Spring 17 Die 18 Rib

Claims (3)

[Claims] 1. A sheet made of a heated thermoplastic resin.
Using the mold, make a concave hole and a convex part with a raised edge to fix the electronic parts in the center of the bottom of the concave hole.
The method of manufacturing a container of an electronic component having a mold
Consists of male and female, male surrounds the male central leg and
It consists of a male type peripheral part that is integrated with, the female type is the male type central leg
Female central leg forming a convex part with a concave hole edge corresponding to
And a female mold that forms the bottom of the recessed hole corresponding to the male peripheral part
It consists of the peripheral part, and the female central leg and the female peripheral part are separate
Method for producing a container of electronic components are supported by a number of springs independently characterized the vertical movement to Rukoto. 2. The manufacturing method according to claim 1, wherein the concave hole portion and the convex portion are molded in one step. 3. The manufacturing method according to claim 1, wherein the width of the edge is 0.3 to 0.8 mm.