JPS636326B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold mounting device for holding a mold during the molding process of products manufactured using plastic materials, and more specifically, the present invention relates to a mold mounting device for holding a mold in the molding process of a product manufactured using a plastic material, and more particularly, the present invention relates to a mold mounting device for holding a mold in the molding process of a product manufactured using a plastic material. The present invention provides a highly efficient mold mounting device.

When molding products from plastic materials, a method is usually adopted in which the plastic material is pressurized and molded using a mold that is divided into at least two parts and has a cavity that is the same as the shape of the product. The method uses a set of retainers to hold each piece of the mold in order to separate and assemble the pieces together. This retainer is usually disk-shaped, and a plurality of molds are appropriately arranged and attached depending on the size of the mold and the size and capacity of the molding press used. If it is necessary to change the product to be produced in a molding operation that uses a retainer with such a configuration, remove each mold from the retainer and attach the mold for the next product, or change the mold for the next product. It is necessary to newly install another retainer with a mold attached, and the work is complicated.

In view of the above-mentioned problems in the prior art, the present invention includes a mold holding means including an upper mold sub-retainer that holds an upper mold, a lower mold sub-retainer that holds a lower mold, an upper retainer that holds an upper mold sub-retainer, and The structure includes a lower retainer that holds a sub-retainer for the lower mold, and each mold and each sub-retainer, and each sub-retainer and each retainer are combined so that the upper mold and lower mold corresponding to each other are combined concentrically during molding, and Both the upper and lower retainers should be moved close to each other while maintaining a predetermined relative position, and when replacing the mold, remove the sub-retainer with the mold attached, and replace the other sub-retainer with the mold for the next product attached. It is as if it were installed. To lock the sub-retainer and the retainer, after fitting the sub-retainer into the groove provided in the retainer, the locking piece is fitted into the locking groove provided on the side surface of the groove to restrain the sub-retainer, and the sub-retainer and the retainer are inserted concentrically. A locking pin or a locking bush is fitted into the drilled locking hole to position the sub-retainer in the groove direction with respect to the retainer, and the mold is attached and locked to the sub-retainer in a manner similar to the mold mounting method in the prior art. Similarly, this is done using a step, a locking groove, and a snap spring provided in the mold. During the molding process, each combination of upper and lower molds is assembled by inserting the guide pin fixed to the retainer on the side that holds the upper mold into the guide bush fixed on the retainer on the side that holds the lower mold, and then moving the upper and lower retainers together. By bringing them closer together, they are superimposed concentrically.

Below, the plan view of Fig. 1, the sectional view of Fig. 2, and the Fig. 3
An embodiment of the present invention shown in the perspective view of the figure and the partial sectional view of FIG. 4 will be described.

The upper retainer 7 and the lower retainer 8 each have a substantially quadrilateral flat plate shape and face each other, and are provided with a subretainer mounting groove 15 and a mold through hole 17 cut in the vertical direction in FIG. Locking groove 1 cut on both sides of sub-retainer mounting groove 15
A locking protrusion 1 which is mainly used during insertion/extraction work into a press machine and mold release work.
9 on both sides.

The upper sub-retainer 11 attached to the upper retainer 7 and the lower sub-retainer 12 attached to the lower retainer 8 have a rectangular flat shape with a width dimension matching the sub-retainer attachment groove 15, and are arranged in the longitudinal direction. The upper mold 1 and the lower mold 2 are inserted into the formed mold mounting holes 22, and the upper mold 1 is fixed by the retaining ring 4 inserted into the annular groove cut in each of the molds 1 and 2.
and the lower mold 2 are combined.

Upper sub-retainer 11 for upper retainer 7
To lock the lower sub-retainer 12 to the lower retainer 8, after installing each sub-retainer 11, 12 into the sub-retainer mounting groove 15 of each retainer 7, 8, insert the sub-retainer locking piece into the locking groove 16. 23, and the longitudinal positioning of the upper sub-retainer 11 with respect to the upper retainer 7 is achieved by inserting a step into a through hole concentrically drilled in both members 7 and 11, as shown in FIG. The longitudinal positioning of the lower sub-retainer 12 with respect to the lower retainer 8 is achieved by attaching the head of the guide pin 25, which is shaped like the following, to both members 8 and 12, as shown in FIG. By fitting the step-shaped guide bush 26 into the concentrically drilled through holes, centering of the upper mold 1 and the lower mold 2 corresponding to each other during the molding process is possible. This is automatically done by bringing the upper and lower retainers 7, 8 closer to each other while inserting the guide pin 25 into the guide bush 26.

Since the mold mounting device of the present invention has the above-mentioned structural requirements, molds can be mounted and replaced with each subretainer as a unit, compared to the conventional technology in which each mold is individually mounted and removed. However, it is easy to work, and it is possible to set the mold attachment hole for each subretainer, which brings about effects such as making it possible to mold two or more products with different dimensions at the same time. It can be done.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a cross-sectional view at the position indicated by the arrow - on FIG. 1, and FIG. 3 is a perspective view of the embodiment. FIG. 4 is a partial cross-sectional view at the position indicated by the arrow - on FIG. 1. 1... Upper die, 2... Lower die, 4... Retaining ring, 7...
...Upper retainer, 8...Lower retainer, 11...
Upper sub-retainer, 12...lower sub-retainer,
15...Subretainer mounting groove, 16...Locking groove, 17...Mold through hole, 19...Engagement protrusion, 22...Mold attachment hole, 23...Subretainer locking piece, 25... Guide pin, 26...Guide bush.

Claims (1)

[Claims] 1. An upper retainer 7 having a flat plate shape and having a plurality of sub-retainer mounting grooves 15; a lower retainer 8 having a flat plate shape and having sub-retainer mounting grooves 15 facing the upper retainer 7; None, the upper sub-retainer 11 is removably mounted in the sub-retainer mounting groove 15 of the upper retainer 7 and has a mold mounting hole 22 into which the upper mold 1 is removably fitted, and A mold mounting hole 22 into which the lower mold 2 is removably fitted is provided in a position that is removably mounted in the sub-retainer mounting groove 15 of the lower retainer 8 and corresponds to the mold mounting hole 22 of the upper sub-retainer 11. A mold mounting device comprising a lower sub-retainer 12.