JPS6222353Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for simultaneous molding of different raw materials, and is intended to provide an apparatus that can maintain good partitioning of the mold cavity by a partition plate and also facilitates assembly of the apparatus.

Conventionally, when a foam molded product requires strength in some areas or chemical resistance in others, the cavity of the foam mold is partitioned with a partition plate, and the above partition is used. Each mold cavity is filled with resin particles of different types, and after filling or during heating, the partition plate is removed from the mold cavity and heated and expanded with a heating medium such as steam to become different types. A foam molding method is used in which raw materials are heated and fused together, but the molding equipment used in the foam molding process is such that the partition plates and the air cylinders that move them forward and backward are fixed to each other as one unit. If the partition plate cannot move freely, for example, if there is an error in the relative mounting position of the air cylinder to the cavity part, the partition plate may not be properly assembled to the cavity part and may become twisted and slide back and forth. In addition to the inconvenience of not being able to perform the process smoothly, there are also inconveniences such as the protruding end of the partition plate not making sufficient contact with the inner wall of the core part, creating a gap between the two, and worsening the partitioning condition in the mold cavity. It was something that would happen.

In order to prevent such inconvenience, partition plates,
In addition to forming the connectors etc. with high precision, it is necessary to pay close attention to the relative assembly accuracy of the air cylinder and the like to the mold, making the manufacturing process troublesome and the efficiency of the assembly work very low.

Therefore, in this invention, the above-mentioned conventional inconveniences can be solved with a simple structure.The structure is such that a partition plate is provided in the mold cavity of the mold so that it can move forward and backward, and each of the partitioned parts is In a foam molding device that heat-fuses resin particles, which are different raw materials, into a mold cavity, a partition plate is
It is rotatably fixed to the coupling tool attached to the cylinder for advancing and retreating, and the coupling tool is also
It is characterized in that the partition plate is rotatably fixed to the rod of the cylinder by an axis parallel to the axis fixing the partition plate.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

1 is the entire cavity mold, 11 is a box frame that becomes the outer frame of the cavity mold 1, and 12 is a cavity part that becomes the inner mold (template plate) of the cavity mold 1. An insertion hole h for the partition plate 2 is formed, and a slide guide S for the partition plate 2 is formed by raising the entire periphery of the insertion hole h to the outside of the mold cavity. With this slide guide S, the partition plate 2
This provides a sufficient guide width for use, effectively preventing tilting and twisting during sliding, and also compensates for the reduction in strength of the cavity portion 12 due to the insertion hole h.

3 is the entire core mold, 31 is a box frame that becomes the outer frame of the core mold 3, and 32 is a core part that becomes the inner mold of the core mold 3;
The partition plate 2 comes into contact with the inner wall of mold cavity A.
will be in charge.

The above-mentioned partition plate 2 is connected to the cylinder rod 22 of the air cylinder 21 for forward and backward movement via a rod-shaped connector 23. It is rotatably fixed by a pin P inserted in the plate thickness direction, and the other connector 23 is attached to the cylinder rod 22.
On the other hand, it is rotatably fixed by a pin P' inserted in the radial direction of the cylinder rod 22 parallel to the pin P fixing the partition plate 2 (see especially Fig. 3). ). For this reason, the cavity portion 12
Even if the mounting position of the air cylinder 21 relative to the cavity section 12 is shifted in the vertical direction in FIG. In addition, by rotating the partition plate 2, the distal end surface can be easily moved along the inner wall of the core portion 32 at the advancing end. As a result, it is possible to secure a good partitioning state without creating a gap between the two. Reference numeral 24 denotes a flange for mounting the cylinder 21, which can be separated from the middle part, and when the partition plate 2 is replaced, the connecting tool 23 and the cylinder rod 2 can be separated.
The pin P' connecting the two can be easily pulled out.

Furthermore, 4 is a filling device installed in the box frame 11 of the cavity type 1, and each filling port 41
are connected to the mold cavities a, a', and a'', which are partitioned by a partition plate 2, respectively, so that resin particles of different types of raw materials can be filled into the mold cavities A.

5 is a stopper bolt for adjusting the retracted position of the partition plate 2, and the retracted position is adjusted so that the tip end surface of the partition plate 2 is flush with the inner wall of the cavity portion 12, and the retracted position of the partition plate 2 is adjusted. This is to prevent product scratches or burrs from occurring due to the insertion hole h.

Note that molded product releasing means such as an engine pin is omitted from illustration.

In order to perform simultaneous molding of different materials using the above-mentioned device, after matching the cavity mold 1 and the core mold 3, the partition plate 2 is After moving the mold cavity A forward and dividing it into mold cavities a, a', and a'', for example, mold cavity a' and mold cavity
A'' is filled with the same kind of raw material, and mold cavity a is filled with raw materials different from the above raw materials. After filling each raw material, the partition plate 2 is moved back by the air cylinder 21, and steam is supplied from the steam supply hole (not shown). In this method, dissimilar raw materials made of foamable thermoplastic resin are heated and expanded to fuse and form them together.

Note that the timing for retracting the partition plate 2 by the air cylinder 21 is not before the above-mentioned heating, but it may be retracted at a stage in the middle of heating when the expandable thermoplastic resin particles begin to fuse a little. good.

Furthermore, the partition plate 2 is connected to the connecting tool 23 or the connecting tool 2
In addition to the above-mentioned pins P and P', bolts or the like may be used as a member for connecting the cylinder rod 22 to the cylinder rod 22, and a cantilever support may be used as the connection method. In either case, if the partition plate 2 is fixed to the connecting tool 23 with a margin that allows it to move in the thickness direction, it is possible to absorb the misalignment of the air cylinder 21 in the vertical direction in FIG. 1. , a more suitable implementation.

This device is constructed as described above, and a partition plate 2 that partitions the inside of the mold cavity A of the mold is provided so as to be able to move forward and backward, and each of the different raw materials is transferred to each of the partitioned mold cavities a, a′, and a″. In a foam molding apparatus that is filled with resin particles, removes a partition plate 2, and heat-fuses the resin particles serving as different raw materials together, a connecting tool 2 in which the partition plate 2 is attached to a cylinder 21 for advancing and retracting the partition plate 2.
The cylinder 21 and the connector 23 are rotatably fixed to the cylinder rod 22 about an axis parallel to the axis that fixes the partition plate 2. Since the shaft is freely fixed, even if the relative mounting position of the air cylinder 21 with respect to the cavity part 12 is shifted, at least the shift in the rotational direction of the partition plate 2, etc. It can be easily absorbed by the rotation of , and the partition plate 2 can be smoothly slid forward and backward.

In addition, when the protruding end of the partition plate 2 comes into contact with the inner wall of the core portion 32, the leading end surface can easily follow the inner wall by rotating the partition plate 2.
There will be no gap between the two, and a good partitioning condition within the mold cavity A by the partition plate 2 can be ensured.

Therefore, it is easy to assemble and adjust the cylinder 21 for advancing and retracting the partition plate 2 with respect to the cavity mold 1, and the partition plate 2 and the connector 23 themselves do not require as strict precision as conventional products. It is possible to facilitate the manufacture of the device, and also to provide an apparatus that can maintain the partitioning state of the mold cavity A by the partition plate 2 well for a long period of time.

[Brief explanation of the drawing]

The figures illustrate an embodiment of the invention, and FIG. 1 is a sectional view, FIG. 2 is a partially omitted sectional view taken along the front line, and FIG. 3 is a perspective view of the main parts of the connector. be. 1... Cavity type, 12... Cavity part,
2... Partition plate, 21... Cylinder, 22... Cylinder rod, 23... Connector, 3... Core mold, 32... Core part, 4... Filler, h... Insertion for partition plate Mouth, S...Slide guide.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A partition plate that partitions the cavity of a mold is provided so as to be movable back and forth, and resin particles serving as different raw materials are heat-fused together into each of the partitioned cavities. In a foam molding device, the partition plate is rotatably fixed to a connecting tool attached to a cylinder for advancing and retracting the partition plate, and the connecting tool is also attached to an axis parallel to the axis that fixes the partition plate. An apparatus for simultaneous molding of different raw materials, characterized in that the shaft is rotatably fixed to the rod of the cylinder. 2. The simultaneous molding apparatus using different raw materials according to claim 1 of the above-mentioned utility model registration claim, wherein the partition plate is pivoted to the connector so as to be movable in the thickness direction thereof.