JPH03142208A - Molding machine - Google Patents

Abstract

PURPOSE:To manufacture a molded product which is twice as large as a product manufactured in a molding machine heretofore available in a space equivalent to the space for the molding machine heretofore available by mold clamping a first movable mold and a second movable mold from both sides to respective molding surfaces of a fixed mold and molding on both end surfaces of the fixed mold. CONSTITUTION:A left driving section 11 and a right driving section 12 are disposed on both sides of an upper section of a main body frame 10. Cores (movable molds) 21 and 22 are mounted respectively on movable platens 19 and 20, left and right, and moved together with movable platens 19 and 20 in the horizontal direction to be freely close to or away from a mold 24. Resin is injected by an injection section 27 into the mold through a resin path 23a and resin injection inlets 24a and 24b. The left and right movable platens 19 and 20 are moved backward when the given time passes after injection, and the cores 21 and 22 are separated from the fixed mold 24 respectively. A resin molded product is manufactured on a molding section of the surfaces of cores 21 and 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molding machine for manufacturing a molding surface using a mold.

[Conventional technology]

When manufacturing resin molding surfaces such as plastic molding surfaces,
An injection molding machine is used. This injection molding machine mainly consists of a pair of molds on a movable side and a fixed side, a mold clamping part for pressing these molds together, and an injection molding part for injecting resin into the clamped mold. It consists of two parts.

An example of a conventional injection molding machine is shown in FIG. The injection molding machine shown in FIG. 3 includes a main body frame 1, a mold clamping section 4 having a fixed platen 2 on which a fixed mold is mounted, a movable platen 3 on which a movable mold is mounted, and pellets stored therein. A creation part 7 having a hopper 5 and a nozzle 6 for injecting resin, and a drive system 8 provided below the mold clamping part 4 within the main body frame l.
It consists of °ζ.

In such a device, the movable platen 3 is pressed against the fixed platen 2 by a hydraulic cylinder or the like to clamp the fixed mold and the movable mold, and in this state, resin is injected into the mold from the nozzle 6 of the injection part. inject. After this, the mold is opened to obtain a product.

(Problems to be Solved by the Invention) The conventional injection molding machine has poor production efficiency relative to the space occupied by the device, and is not suitable for mass production.In order to mass produce, the conventional injection molding machines are arranged side by side. However, in order to install a separate molding machine, a new space that exceeds the length of both the mold clamping part 4 and the injection part 7 described above is required, and a very large space is required. Put it away.

In addition, with conventional equipment, the mold is clamped from one direction, so the support structure for the fixed mold needs to be large enough to withstand the clamping force. ! It becomes sloppy.

An object of the present invention is to provide a molding machine that can perform injection molding efficiently in a small space.

[Means to solve the problem]

The molding machine according to the present invention performs molding using a mold, and includes a fixed mold and a first mold. It includes a second movable mold and a movable mold driving means.

The stationary mold is fixed to the molding machine main body frame, and has molding surfaces on both end surfaces. In addition, the above-mentioned No. 1. Second
The movable mold can freely approach and move away from each end face of the fixed mold. Further, the movable mold driving means includes:
The first. on each end surface of the fixed mold. This is for clamping the second movable molds, respectively.

[Effect]

In this invention, molding surfaces are formed on both end surfaces of the fixed mold, and a first molding surface is formed on each molding surface from both sides. Second
The moving molds are each clamped.

Molding is then performed on both end surfaces of the fixed mold.

As a result, it is possible to manufacture twice as many molding surfaces as with the conventional device in the space of one conventional molding machine.

〔Example〕

FIG. 1 shows a front view of a molding machine according to an embodiment of the present invention. This molding machine has main body flrays 1 and 10 with approximately the same length (in the left-right direction in FIG. 1) as the conventional molding machine.
A left drive section 11 and a right drive section 12 are arranged on both upper sides of the main body frame 10 . The left drive part 11 and the right drive part 12 are each provided with a power part 15.16 for driving a hydraulic piston 13.14. Each power unit 15,16 consists of a motor, a compressor, and the like.

A top tie bar 17 and a bottom tie bar 18 are provided between the left and right drive parts 11 and 12. Guided by the upper tie bar 17 and lower tie bar 18, the left movable plate 19 and the right movable plate 20 move in the horizontal direction. The left and right movable 919.20 each have a core (movable mold) 2.
1.22 is attached, and moves horizontally together with the movable platen 19.20 to approach the mold 24, which will be described later.
7 members are free to leave. Further, a fixed platen 23 is fixed to the upper center of the main body frame 10. A fixed mold 24 is arranged on this fixed platen 23 so as to be sandwiched between the cores 21 and 22.

Both end surfaces of the fixed mold 24, that is, the surfaces facing the core 21.22, are molding surfaces, and resin injection ports 24a and 24 are provided in the center for injecting resin into the mold.
b is provided.

- On one side of the main body frame 10 (right side in FIG. 1), there is provided an injection section 27 having a hopper 25 and a nozzle 26 for conveying the pellets in the hopper 25 while melting them. The injection end (upper end in FIG. 1) of the nozzle 26 is connected to a resin passage 23a formed in the fixed platen 23.

Note that when changing the material of the resin to be molded, the injection part 27
The nozzle 26 is rotatable within a predetermined angular range so that residual material therein can be discharged. Further, on the other side of the main body frame IO (left side in FIG. 1), a control section 28 that controls the apparatus is arranged.

In the molding machine having such a configuration, first, the power units 15 and 16 are driven, and the left and right movable plates 19, 20 are pressed toward the fixed plate 23 by the hydraulic pistons 13, 14. Each movable 9
19 and 20 move in parallel along the upper and lower tie bars 17 and 18, and the cores 21922 abut on both end surfaces of the fixed mold 24, respectively.

Then, the mold is clamped by maintaining the pressing force at a predetermined pressure.

In this state, the injection part 27 provided below the main body plate 10 allows the resin passage 23a, the resin injection port 24a,
Resin is injected into the mold via 24b. Here, the resin passage of the nozzle 26 and the resin passage 23a in the fixed platen 23,
Furthermore, heaters (not shown) are provided around the resin injection ports 24a and 24b to prevent the resin supplied into the mold from cooling and solidifying midway.

After a predetermined period of time has elapsed after resin injection, the left and right movable plates 19
．． 20 is retracted to separate the cores 21, 22 from the fixed mold 24, respectively. Thereby, a resin molded surface is obtained on the molded surface of the core 21, 22 surface.

In such an embodiment, production for two conventional molding machines can be performed in approximately the same space as the conventional molding machine, and production efficiency can be improved. Moreover, since the injection part 27 is arranged inside the main body frame IO, the height dimension can also be reduced.

In addition, from both the fixed mold 24, the left and right movable plates 19.20
Since the cores 21 and 22 of the mold are pressed, the pressing horns from both the left and right sides are canceled out, and the mold clamping mechanism can be deformed. In particular, the pressing force acting on the stationary platen 23 is significantly smaller than that of conventional devices, and can be supported by a simple support structure.

Furthermore, in this embodiment, since the left and right movable plates 19, 20 are each provided with a power unit 15, 16, it is possible to manufacture a large resin molded surface with one unit.

[Other Examples]

(a) In the embodiment described above, the injection part 27 is provided at the lower part of the main body frame 10, but the position of this injection part 27 is not particularly limited to the lower part of the main body frame 10.

For example, as shown in FIG. 2, an injection section 30 may be provided above the mold clamping mechanism section, and the resin may be injected from the top of the fixed platen 23.The other configurations are the same as in FIG. , left and right drive units 1 are provided on both left and right sides of the main body frame 1o.
1.12 is provided, and a fixed platen 23 is provided in the center, and a fixed mold 24 is mounted on this fixed platen 23. Furthermore, the left and right movable plates 19.20 are movable left and right along the upper and lower tie bars 17.18 by the left and right drive units 11.12, and the cores 21.20 are attached to these movable plates 19.20, respectively. 22 is fixed.

In the embodiment shown in FIG. 2, the height of the device is higher than that shown in FIG. 1, but since the resin can be injected from the top, the resin can be transported with a small transport force. It has the advantage of

(b) In the above embodiment, the left and right movable plates 19.20 were driven by separate power units 15.16, but it is possible to drive these movable plates 119.2 (+) by one power unit. You may also do so.

(C) In the above embodiments, the present invention was applied to a molding machine that manufactures resin molded surfaces, but the present invention can be similarly applied to other molding machines, such as aluminum die-cast products and sintered parts. Can be done.

〔Effect of the invention〕

As described above, the present invention is configured so that molding can be performed on both sides of the mold, so it is possible to produce two machines in the space required for 811 conventional molding machines, improving production efficiency. can.

[Brief explanation of the drawing]

FIG. 1 is a front view of a molding machine according to an embodiment of the present invention, and FIG.
The figure is a front view of a molding machine according to another embodiment of the present invention, and FIG. 3 is a front view showing an example of a conventional molding machine. 10... Main body frame, 11.12... Drive unit, 1
5.16... Power part, 21.22... Core (movable mold) 24... Fixed mold.

Claims (1)

[Claims] (1) In a molding machine that performs molding using a mold, there is a fixed mold that is fixed to the molding machine body frame and has molding surfaces on both end faces, and that can freely approach and separate from each molding surface of the fixed mold. a first movable mold and a second movable mold provided on the fixed mold; and movable mold drive means for clamping the first movable mold and the second movable mold on each end surface of the fixed mold, respectively. Molding machine.