JPH082557B2 - Insert molding method and insert molding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molding method and an insert in which an insert member is continuously transferred and supplied to a molding die, and resin molding is successively carried out at predetermined intervals, and then cut to transfer and discharge an insert molded product. The present invention relates to a molding device.

[0002]

2. Description of the Related Art For example, in the case of manufacturing a connector with a pin (with a terminal pin) as shown in FIG. 1, a metal member forming a terminal pin is used as an insert member and an insert resin is used. Molded.

In such a case, before the insert member is resin-molded, the punch-molded insert member is subjected to bending press working to form a bent terminal pin portion and then resin-molded.

Further, for the purpose of automation and mass production, an insert member punched out of a long strip-shaped metal band is transferred and supplied to a molding die, and resin molding is successively carried out at predetermined positions of the continuous insert member. , The molded parts are separated and cut to produce insert molded products one after another.

Conventionally, the insert member which has been previously subjected to the press working is transferred and supplied, or the insert member which is transferred and fed is passed through a press working machine to be pressed, and then flows out from the press working machine. It is merely configured such that a bent insert member is sent to a molding die to be insert-molded, and a portion after the insert molding is sequentially cut by a cutting machine.

That is, in the conventional apparatus, the molding machine, the press processing machine, and the cutting processing machine are independent of each other and operate individually.

However, in order to improve the production efficiency, each machine must be operated in synchronization with the transfer of the insert member. Therefore, the construction of each machine and the construction of each machine to operate in synchronization are very important. It was troublesome. In addition, a drive mechanism for opening and closing or operating reciprocating motion of each machine is required for each machine, resulting in a very high cost.

[0008] In view of the current situation, the applicant of the present invention performs reciprocating motions on each machine. On the other hand, the molding machine is also reciprocally movable to open and close. The inventors have found that the above can be easily solved, and completed an epoch-making system of the present invention that has never existed before.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

In the insert molding method in which the insert member 1 which is continuously transferred and supplied is subjected to press working and resin molding, and a predetermined section is cut to successively mold the insert molded products 2 one after another, the molding die for carrying out the resin molding. Opening / closing part 3A integrated with the molding die 3 which opens / closes in conjunction with the opening / closing of 3
Then, the present invention relates to an insert molding method characterized in that the press working and the cutting work are performed.

Further, the molding die 3 which is opened and closed is provided with a resin molding portion 4 for resin-molding the insert member 1 which is continuously transferred and supplied from one side to the other side, and at least the insert member of the resin molding portion 4 is provided. 1 is provided with a press working part 5 on the transfer base side and a cutting process part 6 on the transfer front side.
By the opening / closing operation of the molding die 3, a predetermined position of the insert member 1 is resin-molded by the resin molding unit 4, another predetermined position is simultaneously pressed by the press working unit 5, and another predetermined position is a cutting work unit. An insert molding apparatus characterized in that the insert molding products 2 which are simultaneously cut by 6 and are pressed by opening and closing the molding die 3 and feeding and supplying the insert member 1 are cut and discharged one after another. Is.

[0012]

The operation will be described based on the insert molding apparatus according to the second aspect.

A strip-shaped insert member 1 serving as an insert portion of each insert-molded product 2 in each predetermined section is continuously transferred from one side to the other side of the molding die 3 for opening / closing operation every opening / closing operation.

The resin molding portion 4 of this molding die 3 and the molding die 3
The insert-molded product 2 is cut and discharged one after another by the press working portion 5 and the cutting working portion 6 provided in the opening and closing portion 3A which is integrated with the molding die 3 which is opened and closed in conjunction with the opening and closing operation.

When the molding die 3 is closed, a predetermined position of the insert member 1 is resin-molded and insert-molded.

At the same time, by opening and closing the molding die 3, at least a predetermined position of the insert member 1 is pressed by the pressing portion 5 provided at the front portion of the transfer of the resin molding portion 4.

At the same time, the portion of the insert member 1 that has undergone the insert molding is separated from the succeeding portion by the cutting portion 6 provided at the rear portion of the transfer of the resin molding portion 4.

When this one-time opening / closing operation is completed, the insert member 1 is transferred every predetermined section, and the above-mentioned opening / closing operation is performed again.

Therefore, the press working section 5 presses a predetermined section of the new insert member 1 sent, and the resin molding section 4 of the insert member 1 already pressed by the press working section 5 by the opening / closing operation. A predetermined section is resin-molded and insert-molded, and the cutting section 6 cuts a predetermined section of the insert member 1 that has been insert-molded by the resin-molding section 4 in the previous opening / closing operation and separates it from the subsequent insert-molded product. Discharge 2.

[0020]

EXAMPLE In this example, as shown in FIG. 1, a large number of downwardly projecting metal terminal pins 31 are formed side by side on one side of the resin portion 30, and terminal pins 32 horizontally bent and projecting are formed on the other side. The present invention is applied to a case where a large number of connectors with terminal pins formed side by side are formed by insert resin molding.

The insert member 1 for transfer and supply is formed by punching and molding a long strip-shaped thin metal strip so that a predetermined pattern is repeated for each fixed section (in this embodiment, exactly the same pattern is continuous). , Used without any bending process. Therefore, there are no bent parts,
Since it is formed in a strip shape, in this embodiment, the insert member 1 is wound up and stored on the supply reel, and the insert member 1 is pulled out from the supply reel. It is arranged so as to be transferred and supplied, and the other end is configured to be pulled out and controlled while maintaining a constant tension for a predetermined section each time the mold 3 is opened and closed.

Further, in this embodiment, the insert member 1 is provided with a carrier portion 9 provided with pilot holes 8 for positioning guides at predetermined intervals, and the carrier portion 9 is pulled from the other side to form the insert member 1 in the molding die 3 The carrier is fed to the inside, and the cutting and cutting by the cutting processing section 6 is configured such that the carrier section 9 is continuously left and separated from the carrier section 9 and then cut from the following. The insert member 1 is a strip-shaped plate in which terminal pin portions (comb-shaped portions) which are connected to one another at predetermined intervals are formed in parallel in a narrow carrier portion 9.

In this embodiment, such an insert member 1 as described above is used.
The following processing method is applied to.

As shown in FIG. 2, from the transfer base end side of the insert member 1, a bending process for forming a terminal pin 32 to be bent and hung (bending process on the side opposite to the carrier portion 9), insert resin molding, bending process. The kink process for forming the retaining step portion 33 for insertion on the terminal pin portion on the side opposite to the carrier portion 9 which has been subjected to the cutting, the cutting processing for separating the carrier portion 9 and the succeeding portion, and the terminal on the side of the carrier portion 9 together with this cutting processing. pin
31 kink treatments.

Therefore, in this embodiment, the insert member 1 is processed in the above-mentioned order. However, each predetermined position is simultaneously processed by one opening / closing operation of the molding die 3 for resin molding. After that, the insert member 1 is transferred by the processing section, and the transfer and the opening and closing of the molding die 3 are repeated, so that the insert molded product 2 subjected to the bending process and the kink process is manufactured one after another. ing.

Further, in this embodiment, the portion for bending and kinking is the press working portion 5, and the press working portion 5 for kinking treatment is also provided at the position where the cutting working portion 6 is formed. The press working parts 5 are provided on both sides of the transfer base end and the tip end of the part 4.

Next, the molding die 3 of this embodiment will be described.

As shown in FIGS. 3 and 4, a press working section 5, a resin molding section 4, and a press working section 5 for sequentially performing the above-mentioned processing on the opening / closing movable plate 11 of the molding die 3 of the injection molding machine 10 from one side.
A, a cutting processing portion 6 and a press processing portion 5B are provided.

Therefore, the movable plate 11 itself is the opening / closing section 3.
A movable plate 11 which is A and constitutes the molding die 3 for resin molding
The opening / closing operation of is used as a reciprocating movable plate for pressing and cutting.

The processing is performed by the same opening / closing operation for each of them, but for the sake of explanation, when sequentially explained from the transfer base end side, the press processing section 5 for performing the bending processing which is the first step is a movable plate as shown in FIG. The female die 12 is formed on the fixed die 11, the male die 13 is provided on the fixed side, and the movable die 11 is opened and closed. A predetermined section is bent inward toward the movable plate 11 at a right angle.

The resin molding portion 4 is a movable plate as shown in FIG.
A molding die 3 is constituted by 11 and a receiving portion on the fixed side, an injection nozzle portion 14 is provided on the fixed side, and a resin is molded in a predetermined section that has already been bent by the press working portion 5 in the preceding stage. It is configured to be insert-molded.

In the press working section 5A for performing the kink process of the next stage, a female die 15 is formed on the movable plate 11 as shown in FIG.
The male die 16 having a concave step portion 33 formed in the middle of each terminal pin 32 by pressing the bent terminal pin 32 on the side opposite to the carrier portion 9 disposed on the female die 15 is made movable. A pressing portion 17 is provided on the fixed side to move the male die 16 toward the female die 15.

At the next stage of the movable plate 11, as shown in FIG. 8, the cutting processing portion 6 and each terminal pin on the carrier portion 9 side.
A press working portion 5B for similarly subjecting the kink treatment to 31 is provided at the same position, and the kink treatment is performed while cutting the work and pressing the insert member 1, and the insert molded product 2 is separated and dropped. .

The cutting section 6 is provided with a receiving section 18 on the movable plate 11,
A blade part 19 is provided on the fixed side, and the receiving part 18 and the blade part 19 separate the insert-molded product 2 from the carrier part 9 so as to cut the press-molded part 5B for kink processing. A kink process is performed by the female die 21 in a state where the spring 20 is compressed and pressed against the receiving portion 18 without dropping the product 2.

The fixed side is divided into three pieces in order to surely perform such kink processing, bending processing, and cutting processing with a single opening / closing operation and to secure a resin molding structure. Two of these are the two plates on the movable plate 11 side.
4 and 25 are slidably slid so that they function as guide plates for opening and closing operations.

The present invention is not limited to this embodiment, but the structure of the press working part or the structure of the cutting work part may be changed depending on the product to be applied.
As for the arrangement position, the insert members 1 are simultaneously transferred side by side in several stages, as in the present embodiment, or the number of sections for each process is increased to open a large number of movable plates 11 at one time. The insert molded product 2 may be configured to be molded,
Each constituent means can be designed as appropriate.

[0037]

Since the present invention is configured as described above, by opening and closing the molding die, press processing such as bending in the pretreatment step and cutting processing in the posttreatment step can be performed at the same time. Very complicated automatic insert molding that does not require such troublesome synchronization control of each machine as a drive source is only a molding die, can greatly reduce costs and can automatically mass-produce molded products one after another. It becomes an insert molding method and an insert molding device that can easily realize a machine.

[Brief description of drawings]

FIG. 1 is a perspective view of an insert-molded product of this embodiment.

FIG. 2 is a perspective view showing a process of each process of the insert member of the present embodiment.

FIG. 3 is a schematic plan view of the molding die of this embodiment in an open state.

FIG. 4 is a schematic plan view of the molding die of this embodiment in a closed state.

FIG. 5 is a side cross-sectional view of a press working portion for performing bending work according to the present embodiment.

FIG. 6 is a side cross-sectional view of a resin molding portion for performing insert molding of this embodiment.

FIG. 7 is a side cross-sectional view of a press working part that performs the kink process of the present embodiment.

FIG. 8 is a side sectional view of a cutting section and a press section that perform the cutting process and the kink process of the present embodiment.

[Explanation of symbols]

 1 Insert Member 2 Insert Molded Product 3 Mold 3A Opening / Closing Section 4 Resin Molding Section 5 Press Processing Section 6 Cutting Processing Section

Claims (2)

[Claims] 1. A mold for performing resin molding in an insert molding method in which an insert member that is continuously transferred and supplied is subjected to press working and resin molding, and a predetermined section is cut to successively mold insert molded products one after another. An insert molding method characterized in that the press working and the cutting work are carried out at an opening / closing portion which is integrated with a molding die which opens and closes in conjunction with the opening and closing operation. 2. A molding die that opens and closes is provided with a resin molding portion for performing resin molding on an insert member that is continuously transferred and supplied from one side to the other side, and at least a transfer base end of the insert member of the resin molding portion. Side is provided with a press working part, and the transfer tip side is provided with a cutting work part, and a predetermined position of the insert member is resin-molded by the resin molding part by the opening / closing operation of the molding die, and other predetermined positions are simultaneously formed by the press working part. It is configured such that the press-formed insert molded products are cut and discharged one after another by opening and closing the molding die and transferring and supplying the insert member at the same time. Characteristic insert molding equipment.