JPH0435135Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a multiple hopper for an injection molding machine.

[Prior art and its problems] The screw cylinder of a conventional injection molding machine has a
A round hopper was removably attached to the material supply hole, and the material in the hopper fell under its own weight and was supplied to the screw cylinder.

However, when manufacturing injection molded products using another material, it is necessary to remove all the material before the hopper and then fill the hopper with another material, which reduces production efficiency. This is very troublesome and is particularly problematic when producing a wide variety of products in small quantities.

[Purpose of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to reduce the amount of material used because the next material can be used without discharging the previous material. To provide a multiple hopper for an injection molding machine which enables easy and efficient molding of many different types.

[Main points of the invention] In order to achieve the above-mentioned purpose, this invention provides a pedestal that is provided near the material supply port of the screw cylinder of an injection molding machine and has a communication hole to the material supply port and a material waste hole. and is set opposite to this pedestal,
a support seat having a supply hole and a waste hole that face the communication hole and the material waste hole of the pedestal; and a support seat that is rotatably mounted on the support seat and that A multiple hopper having connectable material supply holes is interposed between the pedestal and the support pedestal, and is provided between the communication hole of the pedestal and the supply hole of the support pedestal, and between the material waste hole of the pedestal and the support pedestal. The main point is to have a shutter that prevents or prevents material from passing between the waste holes.

[Embodiment] An embodiment of this invention will be described below with reference to FIGS. 1 to 3.

1 is a screw cylinder of an injection molding machine, a pedestal 2 is integrally provided with this screw cylinder 1, a communication hole 3 communicating with a material supply port 1a of this pedestal 2 is provided, and a material waste hole 4 is provided. It is being

Further, a support seat 5 is provided opposite to the base 2 with a gap, and the communication hole 3 of the base 2 is connected to the support seat 5.
A supply hole 6 and a waste hole 7 are provided facing the material waste hole 4 and the material waste hole 4, respectively.

Further, three hoppers 9a, 9b, 9c are integrally provided on a rotary plate 8 rotatably attached to the support seat 5 (the capacities of these may be different from each other), and this rotary plate Material supply holes 10a, 10b, 10c are provided on the same circumference centered on the rotation center of 8.
is provided. 11a, 11b, and 11c are dryers.

In addition, in the gap between the pedestal 2 and the support seat 5, as shown in FIG. 6 and the communication hole 3, the waste hole 7, and the material waste hole 4 are connected and disconnected from each other on the pedestal 2.
and is provided so as to be slidable in the radial direction of the support seat 5.

Note that the distance between the pedestal 2 and the support seat 5 may be eliminated, and sliding grooves for the shutters 12a and 12b may be provided in the pedestal 2.

Next, the operation of the above embodiment will be explained.

The hoppers 9a, 9b, and 9c are filled with different types of materials, respectively. For example, when a large number of products are produced by the hopper 9a, production may be continued while replenishing the material, but all hoppers 9a, 9b, and 9c may be filled with the same material at once and operated sequentially. You may also use it as In this case, the shutter 12a is opened and the shutter 12b remains closed.

Next, in the case of high-mix, low-volume production, materials often change, so products are produced in the injection molding machine having hoppers 9a, 9b, and 9c in the following manner.

If three types of materials are sufficient, close the shutters 12a and 12b, fill them with the necessary materials, and then rotate the hopper so that the material supply hole 10a of the hopper 9a is aligned with the supply hole 6, for example. After the shutter 12a is moved outward (opened), the communication hole 3 and the supply hole 6 are communicated with each other, and the material is passed through the material supply hole 10a, the supply hole 6, and the communication hole 3 to the screw. Supplied to cylinder 1.

When replacing the material, move the shutter 12a inward (close) to align the material supply hole of the required hopper with the supply hole 6, and then move the shutter 12a outward (open) to replace the required material. Material is fed into the screw cylinder 1.

If three types of materials are insufficient, rotate the hopper with a small amount, for example 9a, and fill the material supply hole 1.
0a to the waste hole 7, move the shutter 12b outward (open), discard the remaining material, and then open the shutter 1.
2b is moved inward (closed) and filled with a different material, the hopper is rotated to align the material supply hole 10a with the supply hole 6, the shutter 12a is opened, and the screw cylinder 1 is filled with a different material. Supply the material.

Further, the hoppers 9a, 9b, and 9c have dryers 11a, 11b, and 11c, respectively, to constantly dry the contained materials.

In addition, as shown in FIG. 3, if four hoppers are used, production of different types of materials becomes possible more quickly.

[Effects of the invention] As described above in detail, the pedestal is provided near the material supply port of the screw cylinder of the injection molding machine and has a communication hole to the material supply port and a material waste hole; a support seat that is disposed opposite to the base and has a supply hole and a waste hole that face the communication hole and the material waste hole of the base; A multiple hopper having a material supply hole connectable to the hole and a waste hole, and a hopper interposed between the pedestal and the support pedestal, between the communication hole of the pedestal and the supply hole of the support pedestal, and the material of the pedestal. Align any one material supply hole of a multiple hopper with a shutter for passing or blocking the material between the waste hole and the waste hole of the support seat and the feed hole of the support seat, and move the shutter to the passing position. Then, the material in the hopper is supplied to the screw cylinder through the material supply hole, the supply hole, and the communication hole, and when the material supply hole and the waste hole are aligned and the shutter is set to the passing position, The remaining material in the hopper is discharged through a material supply hole, a waste hole, and a material waste hole.

Therefore, the next material can be used without discharging the previous material, so molding of many different materials can be done easily and efficiently, and it is particularly suitable for small-volume production of a wide variety of materials. .

[Brief explanation of the drawing]

Fig. 1 is a plan view of a hopper dryer according to an embodiment of this invention, Fig. 2 is a longitudinal sectional front view of the pedestal and shutter screw cylinder section, Fig. 3 is a plan view showing the shutter, and Fig. 4 is another embodiment. FIG. 1...screw cylinder, 1a...material supply port, 2...pedestal, 3...communication hole, 4...material waste hole, 5...support seat, 6...supply hole, 7...disposal hole, 9a, 9b, 9c...multiple hopper dryer, 10a, 10b, 10c...material supply hole, 1
2a, 12b...Shutter.

Claims (1)

[Scope of utility model registration request] A pedestal is provided near the material supply port of the screw cylinder of the injection molding machine and has a communication hole to the material supply port and a material waste hole, and a pedestal is provided opposite to the pedestal and has a communication hole between the communication hole of the pedestal and the material. a support seat having a supply hole and a waste hole facing the waste hole; and a material supply hole rotatably mounted on the support seat and connectable to the supply hole and the waste hole of the support seat. A plurality of hoppers are interposed between the pedestal and the support pedestal, and the material is passed between the communication hole of the pedestal and the supply hole of the support pedestal, and between the material waste hole of the pedestal and the waste hole of the support pedestal. A multiple hopper for an injection molding machine characterized by comprising a shutter for blocking.