JPS5828829Y2 - rubber molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber molding device, and more particularly to a structure for performing continuous work without wasting material in a device that performs molding using an injection cylinder device.

As is well known, unvulcanized compounded rubber has a high viscosity and lacks fluidity, so it often cannot be injection molded like synthetic resin materials.

For this reason, conventional rubber molding technology uses a rubber molding device that injects unvulcanized compounded rubber into a mold using an injection cylinder device.

By the way, in this rubber molding equipment, it is difficult to form a long running channel due to the high viscosity of the unvulcanized compounded rubber, so when using a multi-cavity mold, it is necessary to form an injection hole for each cavity. However, a distribution plate with a pool formed therein is placed over these injection holes, and the compounded rubber is injected from this distribution plate.

However, with such rubber molding equipment, it is necessary to remove the distribution plate from the mold each time molding is performed, and after removing the compounded rubber remaining on this distribution plate, the next molding must be performed. However, both the time required for molding and the amount of labor required were low, and there was a lot of waste of compounded rubber.

The present invention proposes a rubber molding device that can eliminate all the disadvantages of conventional rubber molding devices as described above.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of embodiments of the rubber molding apparatus of the present invention will be explained with reference to the drawings.

FIG. 1 shows the entire rubber molding apparatus according to the present invention. A guide pole 1 is provided with a pair of platens 2 and 3 that can clamp a mold A, which will be described later. An injection cylinder device 6 consisting of
The compounded rubber B contained in the injection cylinder device 6 is injected into the mold A.

According to the present invention, the lower plate 7 of the injection cylinder device 6 has a distribution plate 1 formed with an intake hole 9 communicating with the gate 8.
0 is Pol) 11 Fixed at a.

A large-area pool 12 is formed on the lower surface of the distribution plate 10, which can directly communicate with all injection holes 11 of a mold A, which will be described later.

The bottom surface 12a of the pool 12 is shown as being rectangular.
As shown in the second figure, a material holding groove 13 extending in the radial direction of the intake hole 9 is formed.

These material holding grooves 13 are machined to have a pigeon-shaped cross section as shown in FIG.
3 and held firmly in the pool 12.

In addition, pre-prepared material retainers 14 for mushrooms are planted at the four corners of the pool 12.

These material retainers 14 cooperate with the material retaining grooves 13 to firmly retain the material remaining in the pool 12 when the mold is opened.

The mold A is composed of a middle plate 15 and a lower plate 16 forming a cavity a, and an injection hole plate 17 in which the injection holes 11 are formed.

Since the rubber molding device according to the present invention has the above-described structure, the mold A is pressed by the platens 2 and 3 as shown in FIG. , when the ram 5 is advanced in the direction of the arrow, the compounded rubber B is injected into the cavity a as shown in the first figure.

Thereafter, in order to open the mold A, the platen 2 is raised as shown in the sixth figure.

In this case, although the compounded rubber B located in the pool 12 is not solidified, it is in a high viscosity state and due to the presence of the material holding groove 13 and the material holder 14, the compound rubber B located in the pool 12 does not separate from the distribution plate 10 and pools. I will remain in 12.

Since the compounded rubber B in this pool 12 is pushed into the cavity A by the subsequent compounded rubber during the next molding process, no material is wasted.

As a result, the present invention eliminates the conventional time and effort required to remove the compounded rubber remaining on the distribution plate, and has the effect of reducing waste of materials.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the rubber molding apparatus according to the present invention, Fig. 2 is an enlarged oblique view of the distribution plate shown inverted, Fig. 3 is a sectional view taken along line III-III in Fig. 2, and Fig. 4. is I in Figure 4
A sectional view taken along the line V-IV, and FIGS. 5 and 6 are process explanatory views of the rubber molding apparatus. A: Mold, B: Compounded rubber, 6:
... Injection cylinder device, 10 ... Distribution plate,
11... Injection hole, 12... Pool, 1
3... Material holding groove, 14... Material holder.

Claims (1)

[Scope of utility model registration request] In a rubber molding device that performs molding by injecting compounded rubber into an injection hole plate of a mold that is pressed by an injection cylinder device containing unvulcanized compound rubber, the injection hole plate is placed at the injection end of the injection cylinder device. By fixing a distribution plate formed with a large-area pool that can communicate with the injection hole of the A rubber molding device that holds unsolid compounded rubber in the pool when opened, and injects the compounded rubber in the pool into a mold by subsequent extrusion using an injection cylinder device.