JP3170964B2 - Resin molding method and resin molding apparatus - 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 and an apparatus for holding a plurality of fixing members in a mold at a distance from each other, covering the periphery thereof, and molding the resin in the mold.

[0002]

2. Description of the Related Art Conventionally, when resin-molding a connector, a plurality of terminals are supported at both ends thereof and held in a mold in a state of being separated from each other by injection molding.

[0003]

However, in the conventional method, the terminal is bent by the injection pressure at the time of molding,
There is a possibility that the terminal is exposed to the outer peripheral surface of the connector or the terminals come into contact with each other. By the way, some terminals are sandwiched and held at a predetermined position. However, when the terminals are located at positions overlapping each other, the terminals cannot be held apart.

Accordingly, an object of the present invention is to enable a resin to be held and held at a predetermined position even when fixing members such as terminals are located at positions overlapping each other.

[0005]

To achieve the above object, according to the solution to ## in the resin molding method according to claim 1, together with the previously formed through-window in the alternate position to the fixed member, before
The pair of holding members corresponding to each of the fixing members penetrate the through-holes of the other fixing member, which are alternately arranged, so that the target fixing member is pinched and held at a predetermined position, and resin-molded. ing. In the resin molding apparatus according to the second aspect, the fixing members are formed with through-holes at alternate positions, and the target fixing member is passed through the alternately-fixed through-holes of the other fixing member. It is configured to include a pair of holding tools corresponding to each of the fixing members to hold and hold at a position.

[0006]

According to the method of the first aspect of the present invention,
Since each fixing member has an alternately formed through window, even when the fixing member is in an overlapping position, only the intended fixing member can be held at a predetermined position through the through window. Thereby, the bending of the fixing member due to the injection pressure of the resin is prevented, and there is an effect that only good products can be reliably manufactured. Further, according to the invention apparatus of the second aspect, the above-mentioned invention method can be reliably performed, and the same effect can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to resin molding of a connector will be described below with reference to FIGS.

In the figure, reference numerals 1a and 1b denote terminals made of an elongated metal plate.
As shown in FIG. 1 (A), each end is inserted into insertion grooves 5 formed in the left and right cores 3 and 4 of the mold, so that the positions 1b overlap each other at a certain interval vertically. It has come to be supported by. A predetermined position on the right side of the upper terminal 1a and a lower terminal 1b
Are formed alternately at predetermined positions on the left side. Further, a positioning window 7 having a small diameter is provided at a position corresponding to the through window 6 of the lower terminal 1b of the upper terminal 1a and at a position corresponding to the through window 6 of the upper terminal 1a of the lower terminal 1b. Is formed.

The upper core 8 of the mold has two pins 10
Reference numerals a and 11a protrude so as to correspond to the positions of the respective through windows 6 and the positioning windows 7. The right pin 10a is formed in a long dimension to penetrate the through window 6 of the upper terminal 1a and hit the upper surface of the lower terminal 1b.
Is formed in a short dimension corresponding to the upper surface of the upper terminal 1a. The lower core 9 has the above-described pins 10.
a, 11a and two pins 10b, 1 paired with each other
1b is provided correspondingly. The right pin 10b is
It is a short stepped pin provided at the upper end with a small diameter portion 12 fitted to the positioning window 7 of the lower terminal 1b. The left pin 11b is a long stepped pin that penetrates the through window 6 of the lower terminal 1b and has a small diameter portion 12 provided at the upper end at the upper end to fit into the positioning window 7 of the upper terminal 1a. .

This embodiment has such a structure, and FIG.
As shown in (A), after each terminal 1a, 1b is supported by the left and right cores 3, 4, when the upper and lower cores 8, 9 are moved in a direction approaching each other, as shown in FIG. The left pin 11b of the lower core 9 passes through the through window 6 of the lower terminal 1b, and the small diameter portion 12 at the upper end thereof fits into the positioning window 7 of the upper terminal 1a.
The pin 11a of the upper core 8 forming a pair with the pin 11a contacts the upper surface of the upper terminal 1a, that is, the upper terminal 1a is connected to the lower end of the upper pin 11a and the lower pin 11b.
Are sandwiched from both upper and lower sides.

At the same time, the small-diameter portion 12 of the right pin 10b of the lower core 9 fits into the positioning window 7 of the lower terminal 1b, and the pin 10a of the upper core 8 that forms a pair with the positioning window 7 of the lower terminal 1b. The lower terminal 1b penetrates through the through window 6 of FIG. 1a and hits the upper surface of the lower terminal 1b, that is, the lower terminal 1b is sandwiched from both upper and lower sides by the lower end of the upper pin 10a and the stepped portion of the lower pin 10b. .
When the resin R is injected into the mold in this state, the terminals 1a and 1b are connected to the pins 11a, 11b and 1 as described above.
Since it is sandwiched and held between the pins 0a and 10b, it does not bend due to the injection pressure.

When the die is removed, as shown in FIG. 2, the connector is held in a proper posture without the terminals 1a and 1b being exposed on the outer peripheral surface or coming into contact with each other. In view of the function of the present invention that the terminals 1a and 1b are sandwiched from both upper and lower sides, the positioning windows 7 are formed in the terminals 1a and 1b, and the small diameter portions 12 fitted to the terminals are provided in the pins 10b and 11b. Is not necessary. Further, the present invention can be similarly applied to resin molding of a connector in which three or more terminals are arranged to overlap. In addition, the present invention is not limited to resin molding of the connector, and may be widely applied to other resin molding in which the fixing member may be bent by the injection pressure of the resin, and may take positions overlapping each other.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a state before injection of a resin according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of a state where a resin is injected with a mold set.

FIG. 2 is a cross-sectional view of a connector formed according to the present embodiment.

[Description of Signs] 1a, 1b: Terminal (fixing member) 3, 4, 8, 9: Mold core 6: Through window 10a, 10b, 11a, 11b: Pin (holding tool) R: Resin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B29C 33/00-33/76

Claims (2)

(57) [Claims] 1. A resin molding method for holding a plurality of fixing members in a mold at a distance from each other, covering the periphery thereof, and molding the resin, wherein each fixing member is formed with through windows at alternate positions. In addition, the pair of holding members corresponding to the respective fixing members pass through the alternately penetrating windows of the other fixing member, and pinch and hold the target fixing member at a predetermined position, thereby forming a resin. A resin molding method. 2. A resin molding apparatus for holding a plurality of fixing members in a mold at a distance from each other and covering the periphery with a resin to form a resin, wherein each fixing member is formed with a through window at an alternate position. And a pair of holding tools corresponding to the respective fixing members for holding the target fixing member at predetermined positions by penetrating the alternately penetrating windows of the other fixing member. Resin molding equipment.