JP2519947B2 - Manufacturing method of assembled molded member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a clip used when attaching other parts such as a rubber tube to a sheet metal such as an automobile part, and particularly a soft synthetic resin at an engaging portion with the sheet metal. By inserting the cap formed in, the clip can be engaged without damaging the plate, by combining multiple members molded by different mold devices like a double clip The present invention relates to a method of manufacturing an assembled molded member.

A double clip, which is an example of the above-mentioned molded assembly member, is configured as shown in FIG. 7, and has a clip A molded from a hard synthetic resin and an elastic member which is fitted into the engaging portion of the clip A. The cap B is made of a soft synthetic resin.

[Conventional technology]

In the conventional double clip described above, an operator manually assembles separately molded clip A and cap B, or an assembly machine is used in a process different from the molding process. I was doing.

[Problems to be solved by the invention]

The above-described conventional method for manufacturing an assembly-molded member such as a double clip has a problem that it is inefficient in manual work by an operator, and in the method using an assembly machine, positioning of the clip A and the cap B is extremely difficult. Becomes a difficult task,
There has been a problem that this requires a great deal of labor, time, and equipment cost.

An object of the present invention is to solve the above problems and to assemble a multi-molded member composed of a plurality of members molded by different mold devices, such as a clip and a cap of a double clip, in a series of molding steps. Can reduce the labor, cost and time loss for this assembly, can use existing molding equipment, and does not require additional equipment for assembly. Is to provide.

[Means and Actions for Solving Problems]

According to the method of manufacturing an assembled molded member according to the present invention, after molding, each molded member of the assembled molded member that is assembled with each other is simultaneously injection-molded by using at least two sets of split molds mounted on the fixed plate and the movable plate. Then, while one molding member is supported by one part of the fixed plate side mold, and the other molding member is supported by one part of the movable plate side mold, the movable plate is retracted and other molds are supported. The mold is opened to open the part, and then the movable plate is rotated to a position where the mold of one set faces the mold of the other set,
Next, the movable platen and the fixed platen are brought close to each other to assemble and assemble the two molding members with each other, and then a part of one mold is opened and the movable platen is retracted so that the other mold member is moved. A part is made to hold | maintain an assembly molding member, Then, an assembly molding member is taken out.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 6 shows a two-color injection molding machine equipped with two sets of molds with their axes parallel to each other. This two-color injection molding machine is an injection molding machine that has already been put on the market, and its schematic configuration will be described below.

In the drawing, 1 is a fixed platen, 2 is a movable platen provided facing the fixed platen 1, and one end of this movable platen 2 is the fixed platen 1 described above.
In addition, the other end is slidably supported by a guide rod 3 fixed to a support plate (not shown). A mold clamping ram 4 is provided between the movable platen 2 and the support plate with its axis aligned with the axis of the molding machine. By operating the mold clamping ram 4, the movable platen 2 is moved. Are reciprocated along the guide rod 3. Inside the movable platen 2, that is, the fixed platen 1
On the side opposite to the mold rotating plate 5 is attached to the axis of the molding machine.
It is mounted so that it can rotate through 180 °.

Then, between the fixed plate 1 and the mold rotating plate 5, two sets of mold devices 6 and 7 are arranged at symmetrical positions with respect to the axis of the injection device (rotation center of the movable plate 2), and the movable plate 2 reciprocates. The mold is clamped and opened in the axial direction by the movement. Injection devices 8 and 9 for supplying molten resin to the respective mold devices 6 and 7 are connected to the stationary platen 1 side.

In order to use the above-mentioned molding device as a two-color injection molding machine, two different injection devices 8 and 9 simultaneously inject different color resins into two sets of mold devices 6 and 7. By this step, one color is molded in one mold device 6, and another color molded product is superposed on the other mold device 7 in the single color product molded in the previous process to obtain a two-color product. Molded. Next, the mold is opened and the finished two-color product is knocked out.
Is rotated 180 °, the mold is clamped again, and resin injection is performed.

In this way, another color is injection-molded onto the single-colored product molded in the previous step to form a product of two colors, and at the same time, a single-colored product is molded on the other mold device.

According to the method of the present invention, the two-color injection molding machine described above is mounted on a fixed plate 1
It is carried out by replacing and using two sets of mold devices interposed between the mold rotating table 5 and the mold rotating plate 5.

The structure of the mold apparatus used in the method of the present invention will be described below, and then the method of the present invention will be described with reference to FIGS. 1 to 5 for an embodiment of a method for manufacturing a double clip.

In FIG. 1, 10 is a clip molding die device for molding the clip A, 11 is a cap molding die device for molding the cap B, and these are located at the center of rotation of the mold turntable 5. They are arranged symmetrically with respect to each other.

The clip molding die device 10 comprises a support base 12 fixed to the stationary platen 1 side, and three disassembly molds 13, 14, 15 provided on the mold rotating platen 5 side. The base disassembling mold 13, which is one of the three separate molds 13, 14, and 15, has a cavity for molding the bottom of the clip A, and the molds are divided on both sides.
Cavities for molding the sides of the clip A are formed in 14 and 15, respectively. The base split mold 13 is fixed to a support base 16 fixed to the mold rotating disk 5 side, and the split molds 14 and 15 on both sides are movable in a direction perpendicular to the support base 16. And an actuator such as a hydraulic cylinder or a finger pin (not shown) can be opened and closed in a symmetrical direction. Also, split molds on both sides 1
Slopes 14a and 15a are provided on the back surfaces of the plates 4 and 15. On the other hand, the support base 12 fixed to the stationary platen 1 side is provided with two taper members which abut on the inclined surfaces 14a and 15a of the split molds 14 and 15 to clamp them.
17a and 17b are projected. A cavity for the tip of the clip A is provided in the support base 12 on the side of the stationary platen 1, and a resin supply passage 18 is connected to this cavity.

On the other hand, the cap molding die device 11 is divided into two outer mold halves 20 and 21 on the stationary platen 1 side so as to move in a symmetrical direction with respect to the axis of the mold device 11 and the mold rotation. It is composed of an inner mold 22 fixed to the board 5 side. The bases of the outer split molds 20 and 21 have slopes 20a and 21a symmetrical with respect to the axis.
Is provided. The outer split molds 20 and 21 can be opened and closed by an actuator such as a hydraulic cylinder (not shown) or a finger pin. Also this both outside split mold
A resin supply path 23 is formed on the opposing surfaces of 20, 21.

The inner mold 22 is a hole 2 into which both the outer split molds 20 and 21 fit.
It is provided in 4. Further, the table 25 provided with the inner mold 22 is provided with two taper members 26a, 26b projectingly engaged with the inclined surfaces 20a, 21a of the outer split molds 20, 21 to clamp the molds.

An embodiment of the method of the present invention will be described using a two-color injection molding machine equipped with both mold apparatuses 10 and 11 having the above-mentioned configuration.

(1) Mold clamping and molding (Fig. 1) Mold device 10 for clip molding and mold device for cap molding
After setting the mold rotating plate 5 so that the fixed platen 1 side and the mold rotating platen 5 side of 11 face each other, the movable platen 2 is moved to the fixed platen 1 side to perform mold clamping, and Resin is injected into the devices 10, 11.

At this time, a hard synthetic resin such as polyacetal is injected into the clip molding die device 10, and a soft synthetic resin having elasticity such as synthetic rubber is injected into the cap molding die device 11.

(2) Mold opening (Fig. 2) The movable platen 2 is retracted to open the molds of both mold apparatuses 10 and 11. At this time, both side split metal parts 14, 15 of the clip molding die device 10 and both outer split metal parts 20, 21 of the cap molding die device 11 are kept closed.
The base of the clip A is in a state of being attached to the base split mold 13 located on the mold rotating plate 5 side, and the cap B is the split mold 20, 21 side whose tip is located on the fixed plate 1 side. The mold is opened while being attached to.

Next, the split molds 14 and 15 on both sides of the clip molding mold device 10 are opened (see FIG. 2).

(3) The mold rotating disk 5 is rotated 180 ° (FIG. 3). In this state, the tip of the clip A faces the base of the cap B.

At this time, the side split molds 14 and 15 may be opened.

(4) Moving the movable platen 2 forward (FIG. 4) The movable platen 2 is moved forward over the fitting range of the clip A and the cap B. As a result, the cap B is fitted into the clip A.

(5) Mold opening (FIG. 5) The outer split molds 20 and 21 of the cap molding mold device 11 are opened, and the movable platen 2 is retracted again to perform mold opening. In this state, since it is held on the side of the base split mold 13 of the clip molding mold device 10, it is pushed out with a knock pin or the like and taken out.

(6) Rotate the mold rotating disk 5 by 180 ° (Fig. 1) Rotate the mold rotating disk 5 by 180 ° to return it to the original position and repeat the above operation.

Although the method for manufacturing the double clip shown in FIG. 7 has been described in the above embodiment, it goes without saying that the multiple molding material to be manufactured is not limited to the double cliff.

8 and 9 show another multi-molded member. FIG. 8 shows a key top and FIG. 9 shows a window. These double-molded members are molded and assembled in exactly the same way as the manufacturing process of the double clip and the molding die is different. In both of these members, a is a primary molding member and b is a secondary molding member. The next molded member is shown. Further, FIG. 10 shows an example of a mold device for molding and assembling the top key.

Further, in each of the above-mentioned embodiments, an example of a double-molded member is shown, but it is possible to manufacture a triple- or quadruple molded member by the method of the present invention.

In this case, as many mold devices as the number of constituent members of the assembly molding member are provided, after molding with the respective divided molds, the respective divided molds are exchanged and faced each other, and then the members facing each other are assembled. Further, the above-described operation is repeated while facing the other split molds to mold and assemble the multiple molding member.

〔The invention's effect〕

According to the present invention, it is possible to assemble an assembly-molded member composed of a plurality of members molded by different mold apparatuses in a series of molding steps, and the labor, cost, and time loss for this assembly are reduced. Further, the existing injection molding such as a two-color injection molding machine can be used as it is, and no additional equipment for assembling is required, and the assembling efficiency can be improved with less equipment.

[Brief description of drawings]

1, 2, 3, 4, and 5 are explanatory views showing the constitution and working steps of the molding die apparatus used in one embodiment of the method of the present invention, and FIG. 6 is the method of the present invention. Of the two-color injection molding machine, which is an example of the injection molding machine used in the above, FIG. 7 is a sectional view showing a double clip, and FIGS. 8 and 9 are partially cutaway views showing other assembled molding members. FIG. 10 is a perspective view, and FIG. 10 is a cross-sectional view showing a molding die for a top key. A is a clip, B is a cap, 10 is a mold device for clip molding, and 11 is a mold device for cap molding.

Claims (1)

(57) [Claims] 1. After molding, each molding member of an assembly molding member to be assembled with each other is simultaneously injection-molded by using at least two sets of split molds attached to a fixed platen and a movable platen, and then one of them is molded. While the molding member is supported by one part of the fixed plate side mold, and the other molding member is supported by one part of the movable plate side mold, the movable platen is retracted and the other part of the mold is opened. Next, the movable platen is rotated to a position where the molds of one set face the molds of the other set, and then the movable platen is brought closer to the fixed plate so that both molding members are fitted to each other. Combined assembly, then, by opening a part of one of the molds and retracting the movable plate, the assembled mold member is held by a part of the other mold, and then the assembled mold member is taken out. A method of manufacturing an assembled molded member consisting of the following.