JPH0356345Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a die for insert molding.

(Prior Art) Conventionally, when manufacturing an electronic component using a mold in which insert fittings P such as pins are arranged in a staggered manner in a synthetic resin holder H as shown in FIGS. 6a and 6b, the insert fittings 1 piece in the mold
I had a book insert.

(Problems to be solved by the invention) Inserting the insert fittings P one by one as in the conventional mold is inefficient. Therefore, as shown in FIG. 6, if the inserts P in the same row are connected at the connecting part Pa, the inserts can be set in batches, and it is obvious that productivity will be improved. However, if the insert fittings are arranged in a staggered manner and all the insert fittings are not lined up in a straight line in the width direction of the holder H, the connecting parts of the insert fittings may cause each frame of the mold to rise during demolding. It prevents it from coming out. Therefore, it is not possible to manufacture the above-mentioned insert fittings while they are still connected at the connecting portion Pa. A similar problem occurs with the products shown in Figures 8a and 8b. In addition, in the products shown in Figures 8a and 8b, the insert fittings P are arranged in pairs in two rows above the holder H, but in every other set, insert fittings P1 bent into a crank shape are used. The lower side is shifted outward from the position of the metal insert P.

An object of the present invention is to provide a mold for insert molding that allows commercialization with insert fittings still connected.

(Means for solving the problem) In the mold of the present invention, the first mold 1 and the second mold 2
are located opposite each other, and both types have a holder H.
A plurality of rows of recesses 4 and 5 into which insert fittings P are inserted are provided at predetermined intervals in the row direction, facing and communicating with the cavity 3 in which the molding is performed. A groove 6 into which the connecting part Pa is inserted is provided in the inner part of each recess 4 of the second mold 2, and this groove connects each recess 4. The second mold 2 consists of at least four rows of pieces 21 to 25, and the joint surfaces of adjacent pieces are one surface of the recess and groove, and the wall surfaces of the inner grooves are on the side of the cavity 3. Relief surfaces 62a and 63a are formed which are inclined toward.

(Example) Examples of the present invention will be described below.

In FIG. 1, a first mold 1 and a second mold 2 are located opposite each other, and in this example, the former 1 is a fixed mold, and the latter 2 is a movable mold.

The first mold 1 is provided with a cavity 3 for molding the holder H on the joint surface with the second mold 2.
The mold 1 has a recess 4 into which one end of the insert fitting P is inserted downward from the bottom of the cavity.
...is formed. As shown in FIG. 2, the recesses 4 are arranged in four columns and adjacent to each other every other column in the row direction.

The second type 2 has five pieces 21, 22, 23,
It consists of 24 and 25 pieces, and these pieces are arranged in five rows. The mold 2 is also provided with recesses 5, 51, 52, 53, and 54 in which the other end of the insert fitting P is inserted upward from the joint surface with the first mold 1, in a position opposite to the recess 4. There is.

To explain the relationship between the recesses 51 to 54 and each top 21 to 25, the recess 51 is provided in the top 21, the recess 52 is provided in the top 22, and the recesses 53 and 54 are provided in the two tops 23 located on the right side of FIG. , 24, respectively. Each recess has an opening on the joint surface side of the top (eg, top 21) in which it is provided and the adjacent top (eg, top 22). As shown in FIGS. 1 and 3, grooves 6, 61, 62, 63, and 64 are provided in the inner part of the recess 5 into which the connecting portions Pa of the insert fittings P connecting the recesses are inserted.
The cavity 3 side of the walls of the two grooves 62 and 63 located in the center of FIG.
a, 63a. Each flank has a piece 22,
When pulling out 24 upward, it functions to release it from the connecting part Pa.

Next, we will explain how to use it.

As shown in Fig. 1, one end of the metal insert P is inserted into the recess 4 of the first mold 1, and the other end is lowered while facing the recess 5 of each piece 21 to 25, and the metal insert is inserted. When placed in this recess, both molds close. Thereafter, the cavity 3 is filled with liquid synthetic resin, and once the resin has hardened, each top is removed. The order of extraction is as follows.

First, as shown in the chain line in Figure 1, the center piece 23
Pull it upwards, then pull out the second piece 2 from both sides.
Pull out one of the tops 2 and 24 (top 22 in Figure 4) upward. At this time, when the top 22 rises, the flank 62a rises and the connecting part of the insert fitting
Pa is gradually pressed upward, and the insert P is elastically deformed by this pressing force, and when the top is completely removed, the insert returns to its original position (to the chain line position in the figure) by its spring force. Similarly, the other piece 24
Pull it upward. At this time as well, the insert fitting P acts in the same way as the top 22 due to the flank 63a.
Finally, the molds 21 and 25 on both sides are removed laterally (in the direction of the arrow in FIG. 4). As a result, the product shown in FIG. 6 is produced. Note that the connecting portion Pa of the demolded product is cut off using an appropriate cutting means.

The tops may be arranged in at least four rows, and are not limited to the top row; the number of recesses is determined in accordance with this number, and at least three rows are required.

The example shown in FIG. 5 is a mold used to form the products shown in FIGS. 8a and 8b, but its construction is substantially the same as in the above example, and therefore the reference numerals are the same. However, the recess 4 in the first mold 1
are arranged in two rows, one set on the left and one on the left, corresponding to this product. Similarly, the recesses 5, 51 to 54 of the second mold 2 are arranged in two rows, each consisting of one set of outer recesses 61 and 64 and one set of inner recesses 62 and 63.

(Effects of the Invention) As explained above, according to the present invention, it is possible to easily commercialize the product even when the insert molds are still connected.

[Brief explanation of drawings]

Fig. 1 is a sectional view, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is a sectional view taken along the line of Fig. 1, Fig. 4 is a sectional view showing one stage of use, and Fig. 5 is a sectional view taken along the line of Fig. 1. FIG. 6a is a plan view of the product, FIG. 6b is a front view of the product, and FIG.
The figure is a perspective view of a part of the product in which insert fittings are connected. Figures 8a and 8b are views of other products in which insert fittings are connected, with Figure 8a being a plan view and Figure 8b being a view of the 8th part.
It is a sectional view taken along the line a. 1...First type, 2...Second type, 21-25
... top, 3 ... cavity, 4 ... recess, 5,
51, 54... recess, 6... groove, 62a, 63
a...Escape side.

Claims (1)

[Scope of utility model registration request] A first mold and a second mold are positioned opposite each other, and both molds are provided with a plurality of rows of recesses into which insert fittings are inserted, which face the cavity and communicate with the cavity, at predetermined intervals in the row direction. The second mold is provided with a groove for inserting a connecting part that communicates with the inner part of each recess of this mold. A mold for an insert mold, wherein one surface of the recess and the groove is formed, and a wall surface of the groove located on the inner side forms a relief surface that is inclined toward the cavity side.