JPH0363190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously manufacturing a multi-core connector plug.

By the way, when manufacturing connector plugs with small core diameters, multiple wires must be drawn and drawn at the same time.
It is difficult to cut, and when cutting such a wire to the required length, it is necessary to form the connecting end into a shape that can easily fit into the connected part side such as a connecting hole. For these reasons, the entire manufacturing process, which involves drawing multiple wire rods, cutting them to the required length, and integrally molding the cut wire rods (core) and the resin body, has become more efficient. It has been practically difficult to perform this process well and automatically and continuously.

This invention includes a step of wire drawing a plurality of wire rods with a required interval maintained, and a step of drawing each wire rod after the wire drawing process so that the sliding surface side of two blade plates arranged in sliding contact with each other is By inserting the wire into each blade hole formed from an inclined surface with a small diameter and a large diameter on the non-sliding surface side, and rotating the two blade plates in this state, each wire rod can be inserted at the required pitch interval. A process of forming sharp conical protrusions facing each other in the front and back, and simultaneously cutting and separating the parts where both protrusions are connected, and molding each wire rod through the cutting and separating process into resin molding using a transfer chuck. a step of transferring each of the transferred wire rods onto a parting line between a fixed mold and a movable mold in a mold device, and sequentially supplying each of the transferred wire rods to a predetermined position of a cavity part of the mold device; Before supplying each wire to the cavity of the mold, forming a recess at a predetermined location of each wire to be embedded in the molded resin body to prevent the wire from coming off from the molded resin body side; A resin molding processing step of pressurized injection of molten resin material to mold a molded resin body of a desired shape that holds each of the wire rods in a predetermined position is successively carried out, and the above-mentioned cutting and separation step This invention relates to a continuous manufacturing method for a multi-conductor connector plug, characterized in that sharp conical protrusions are formed at both ends of each core of a molded product made of each cut wire at the same time as each wire is cut, and its purpose is to The aim is to improve the reliability of this type of product and reduce costs by efficiently producing high-precision, high-quality products.

Hereinafter, the process of manufacturing a multi-core connector plug according to the method of the present invention will be explained based on embodiment figures.

In FIGS. 1 and 2, A is a wire supply device that supplies a plurality of wire rods B that have been plated to a mold device C for resin molding;
The figure shows that after the wire B is supplied to a predetermined position of the cavity part consisting of the cavities 3 and 4 formed in the fixed mold 1 and the movable mold 2 in the mold apparatus C, both molds 1 and 2 are completely tightened. Figure 2 shows the state in which the molded product D of the multi-core connector plug is opened after molding, and one pitch equal to the required length "I ₁ " of each core E in the molded product is opened. It shows a state in which it has moved backward toward the side opposite to the mold device C by the amount of time. The wire rod supply device A also includes a mechanism 5 for forming sharp conical protrusions for each required pitch of the wire B from the mold device C side, and for cutting and separating predetermined portions of the protrusions. A movable chuck 6 for the wire B that can move back and forth by the same pitch as the feeding device A moves back and forth, a fixed chuck 7 for the wire B provided at a rear position of the movable chuck, and At a rear position of the fixed chuck, a wire drawing mechanism 8 for the wire B, which is composed of a plurality of wire drawing rollers 8a provided on the feeder A side, is disposed. Also, between the mold device C and the wire supply device A, a molded resin body 9 is provided.
Each wire B to be embedded in the wire rod B is cut and separated by a machine 11 that forms a recess 10 at a predetermined location to prevent it from coming off from the molded resin body, as shown in FIG. 4, and the cutting and separating mechanism 5. A transfer chuck 12a transfers the cut wire (core E) in a predetermined posture onto the parting line between the fixed die 1 and the movable die 2, and the cut wire transferred by the chuck is transferred to the cavities 3 and 4. arm 12 that supplies the
A cut wire transport and supply mechanism 12 consisting of a cut wire rod is provided.

To explain the wire drawing action of the wire rod B by the wire drawing mechanism 8, a plurality of wire rods B ₁ with a required interval maintained are drawn.
is passed between the wire drawing rollers 8a and between the open fixed chuck 7 and the movable chuck 6, and in this state, the movable chuck 6 is closed and the feeding device A (movable chuck 6) is moved, as shown in FIG. Move to mold device C side. Next, when the movable chuck 6 is opened and the fixed chuck 7 is closed to move the feeding device A (wire drawing roller 8a) backward toward the side opposite to the mold device C as shown in FIG. 2, the wire rod B ₁ is subjected to the wire drawing action by the wire drawing roller 8a while the feeding side is fixed at the fixed chuck 7 at the same time.

The feeding action of each wire B ₁ to the molding device C side is performed when the feeding device A performs the above-mentioned wire drawing action and then moves back to the molding device C side, and in this case, In this case, the fixed chuck 7 may be opened and the movable chuck 6 may be closed at that position after the wire drawing operation is completed. In addition, the above-mentioned backward movement of the supply device A also unwinds (feeds out) the wire B at the same time.

Each wire rod B ₂ subjected to the wire drawing action is formed into conical protrusions at required intervals by the cutting and separating mechanism 5, and is cut and separated at predetermined locations of the protrusions. is done as follows. That is, as shown in FIG. 3, two long blade plates 13 and 14 are provided with a plurality of blade holes 13a and 14a through which a plurality of wire rods _B2 can be inserted respectively, and the double blades It consists of an eccentric rod 15 that makes each of the plates revolve around the axis X-X line of each wire _B2 inserted through the blade holes 13a and 14a, a rotation motor (not shown) for the eccentric rod, etc. The blade holes 13 and 14 are arranged so that they can slide into contact with each other with the blade holes 13a and 14a communicating with each other, and the double blade holes 13a and 14a have a small diameter on the sliding surface side and a large diameter on the opposite sliding surface side. It has a sloped surface. Therefore, when the double-edged plates 13 and 14 rotate as described above while the wire rods _B2 after the wire drawing process described above are inserted into the double-edged holes 13a and 14a, each wire rod
The circumferential surface of B ₂ has a circumferential groove 16a having a required depth and having a slope that is substantially the same as the slope of the double-edged holes 13a and 14a, that is, a circumferential groove 16a that has conical protrusions facing each other in the front and back. A continuous portion of both conical protrusions is formed, and in this state, the double-edged plate 1
3 and 14, the intermediate portion of the circumferential groove, that is, the continuous portion of the two conical protrusions in the circumferential groove 16a corresponding to the sliding contact portion of the double-edged holes 13a and 14a is cut and separated. , there is a third
As shown in the figure, a sharp conical protrusion 16 is formed.

However, the cutting and separating action of each wire _B2 described above is as follows:
As shown in _{FIG .}
It is performed while being sent out to the side. Further, before the start of the cutting and separating action, the transfer chuck 12a in the transfer supply mechanism 12 described above is
Therefore _, as shown in _FIG . A suitable recess 10 is pressurized and formed at the location to be embedded in the inside using a recess forming mechanism 11 comprised of a punch or the like. Therefore, as shown in FIG. 4, each cut and separated wire rod (core E) has sharp conical protrusions 16, 16 formed at both ends thereof, and the above-mentioned recesses are formed at predetermined positions on its circumferential surface. 1
0,10 will be formed.

Transfer and supply of each cut and separated wire rod (core E) to a predetermined position in the cavities 3 and 4 is performed in the following manner. That is, the transfer chuck 12a, which holds each of the wire rods (core E) in a pinched manner, maintains the pinching posture and transfers the wire rods to the front position (pitch) of the parting line between the fixed mold 1 and the movable mold 2.
I ₂ ) Transport. Next, after the intermediate molds 1 and 2 are clamped, as shown in FIG. 2, the wire rod is pushed into the cavity side by the arm 12b and supplied to the predetermined position. When transferring the cut wire (core E) of the transfer chuck 12a, the arm 12b rotates and retreats to the side away from the fixed mold 1, the movable mold 2, and the parting line, thereby performing the transfer action of the transfer chuck 12a. The transfer chuck 12a is provided so as not to obstruct the
is provided so as to release the cut wire (core E) after the push-in and supply of the cut wire (core E) by the arm 12b is started so as not to inhibit the feeding action.

The cut wires (cores E) supplied to the cavities 3 and 4 are integrated with the molded resin body 9 for holding them by a normal resin molding process. That is, after the molds 1 and 2 shown in FIG. 1 are completely clamped, molten resin material is injected under pressure into the cavities 3 and 4 to form a molded resin body 9 of a desired shape. , the above molded product D
As shown in FIG. 2, the mold is removed from the cavity by an ejector pin 17 after the mold is opened.

As described above, when the method of the present invention is used, the automation of the continuous manufacturing process can be improved by sequentially performing the above-mentioned steps, and high precision and high quality multi-core connector plugs can be produced in large quantities efficiently. It has an excellent effect that enables production.

In particular, in the wire drawing process of the method of the present invention, a large number of wire rods can be drawn under uniform conditions compared to the conventional method in which the wire rods are simply passed between wire drawing rollers. In addition, in the wire cutting and separation process, each wire rod after wire drawing is placed between two blade plates that are placed in sliding contact, with the sliding surface side having a small diameter and the non-sliding contact surface side having a large diameter. While inserting it into each blade hole formed from an inclined surface,
By revolving each of the two blade plates in this state, sharp conical protrusions are formed facing each other in the front and back at each required pitch interval of each wire rod, and at the same time, the connecting points of both protrusions are Conventional technology (for example, the technology described in Japanese Utility Model Publication No. 8832/1973) involves fixing one of a pair of opposed blades (dies) and rotating only the other for cutting. This is a high quality multi-conductor connector that can efficiently and reliably form a sharp conical protrusion at the cut end of the wire, and is easy to fit between each core and the connected part, making it easy to use. It has the great advantage of being able to mass-produce plugs.

Furthermore, each core embedded within the molded resin body is
Molten molded resin is flowed and filled into the retaining space formed in each cut wire, so that it is firmly held by the molded resin body and does not move accidentally or come off.

[Brief explanation of drawings]

The drawings show an embodiment of the method of the present invention; FIGS. 1 and 2 are explanatory diagrams of all steps of the method of the present invention, and FIG. 3 is a perspective view showing an enlarged main part of the wire cutting and separation mechanism. FIG. 4 is a partially cutaway enlarged perspective view of the wire rod (core) that has been cut and separated, and FIG. 5 is a partially cutaway enlarged perspective view showing a molded product of a multicore connector plug. B, B ₁ , B ₂ ... wire rod, C ... mold device, D ...
...Multi-core connector plug molded product, E...core, 9
... Molded resin body, 10 ... Recess for retaining, 12
...Transfer supply mechanism, 12a...Transfer chuck, 1
2b... Arm, 13, 14... Blade plate, 13a,
14a...Blade hole portion, 16...Sharp conical projection.

Claims (1)

[Claims] 1. A step of wire drawing a plurality of wire rods with a required spacing maintained, and a step of sliding each of the wire rods after the wire drawing process between two blade plates disposed in a sliding state. By inserting the wire into each blade hole formed from an inclined surface with a small diameter on the contact side and a large diameter on the non-sliding contact side, and rotating the two blade plates in this state, the required amount of each wire rod can be determined. A process of forming sharp conical protrusions facing each other in front and back at each pitch interval, and simultaneously cutting and separating the parts where both protrusions are connected, and transferring each wire rod through the cutting and separating process by a transfer chuck. a step of transferring the wire rods onto a parting line between a fixed mold and a movable mold in a mold device for resin molding, and sequentially supplying each of the transferred wire rods to a predetermined position of a cavity in the mold device by an arm; Before supplying each of the wire rods to the cavity section, a step of forming a recess to prevent the wire from coming off from the molded resin body at a predetermined location of each wire to be embedded in the molded resin body; A resin molding processing step of injecting a molten resin material under pressure into the cavity to form a molded resin body of a desired shape that holds each of the wire rods in a predetermined position is sequentially performed, and the above-mentioned A continuous manufacturing method for a multi-core connector plug characterized by forming sharp conical protrusions at both ends of each core of a molded product made of each cut wire rod at the same time as each wire rod is cut by a cutting and separation step.