JPH0320089Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a vacuum casting device used for casting synthetic resin products, rubber products, etc.

BACKGROUND TECHNOLOGY An example of this type of technology is generally shown in FIG. 7.

In the figure, a is a molded box, which is made of iron and is capable of forming a sealed chamber. Inside thereof, a casting device b, a resin tank c, and a catalyst tank d are provided. e is a stirring device, f is a motor, g is a speed reducer, and h is a stirring blade. The resin tank c and the catalyst tank d can be rotated in the directions of arrows A and Ad, respectively, and the contents of the tank can be discharged. i and j each indicate the axis of rotation. K is a hole and l is a lid. Although not shown in the drawings, this molded box a is provided with a door in the direction of the page.

Next, m is a defoaming box made of iron, which is welded to a molded box a, and containers p and q are housed on a shelf o inside the molded box a.

As an example, there is a synthetic resin liquid r in the container p.
However, a catalyst s is also accommodated in the container q. A vacuum pump t is connected to the molding box a and the degassing box m, respectively. The synthetic resin liquid r and the catalyst s are stored in a defoaming box m as shown in the figure, and in this state the vacuum pump t is operated to defoam the synthetic resin liquid r and the catalyst s. Thereafter, both r and s are taken out from the defoaming box m, and the synthetic resin liquid r is stored in the resin tank c of the molding box a, and the catalyst s is stored in the catalyst tank d, respectively. Then, while creating a negative pressure in the molding box a with a vacuum pump, and stirring the synthetic resin liquid r in the stirring tank with a stirring device e, a catalyst s is added into the liquid r. The molding liquid that has been added and stirred is injected into the molding device b by tilting the resin tank c to be molded.

Problems to be Solved by the Invention However, the conventional casting device described above has the following problems. The reason is that the above-mentioned conventional device is installed in a molding box a and can only mold products of the size of molding device b. Also, this molding device b is a molding box a.
limited by the size of Therefore, so-called long objects larger than the molding box a cannot be molded.

This invention was made to solve such problems, and its purpose is to be able to mold so-called long items that are larger than the molding box a, and also to mold items that are smaller than the molding box a, as in the conventional method. The purpose of this invention is to provide a vacuum casting device that can.

Means for Solving the Problems To describe the drawings showing an embodiment of this invention, in Figs. 6; a defoaming box 10 having a communication port 9 on the side wall 8; a blocking plate 11 formed larger than the opening 2 and the communication port 9; a vacuum communicating with the molding box 7 and the defoaming box 10. This is a vacuum casting device characterized by comprising a pump 12. The communication port 9 of the defoaming box 10 is connected to both side walls 8, 8 of the defoaming box 10.
may be formed respectively.

Operation In FIGS. 1 to 3, the vacuum pump 12 is operated, and the liquid synthetic resin 14 and catalyst 15 are defoamed, for example, in the defoaming box 10, and then they are transferred to the molding box 7.

A synthetic resin 14 is placed in a stirring tank 5, a catalyst 15 is mixed therein, and the mixture is stirred by a stirring device 4.
During this time, the inside of the molding box 7 is kept under negative pressure by the vacuum pump 12. After the above-mentioned stirring is completed, the synthetic resin liquid 14 is injected into the molding device 3 and molded.

In the case of the above-mentioned casting, if the molded product is large enough to fit into the molding device 3 in the molding box 7, a shielding plate 11 can be inserted between the molding box 7 and the degassing box 10, so that the conventional device can be used. This is done in the same format as . Next, if the molded product is a long product that cannot be accommodated in the molding box 7, a defoaming box 10 as shown in FIG. Connect and provide. In this case, the opening 2 is communicated with the communication port 9.

Note that also when installing the blocking plate 11 between the molding box 7 and the degassing box 10, or when installing the degassing box 10 in the molding box 7, the gasket 24 is used and the vacuum pump 12 is operated as shown in FIG. The connection is made by creating negative pressure inside the box. Therefore, no fixing members such as bolts are used.

Once the molding box 7 and the defoaming box 10 are communicated and connected, a molding device 3 for long objects (not shown) that straddles both the boxes 7 and 10 is accommodated, straddling both the boxes 7 and 10. It is formed by injecting a synthetic resin liquid into the molding device. Next, when molding a long object that is longer than one molding box 7 and one defoaming box 10 connected, both side walls 8, 8 as shown in FIG.
Using a defoaming box 10 each having a communication port 9,
As an example, this is connected as shown in Fig. 2,
Connect and use. Alternatively, as shown in the figure, two molding boxes 7 or one or more defoaming boxes 10 may be used.

Example In Fig. 1, 14 is a motor, 15 is a reduction gear,
16 is a stirring blade, 17 is a silicone resin frame shown as an example, 18 is a cardboard frame, 19 is a base, 20
is a rail. And catalyst tank 6 and stirring tank 5
are both centered on the axes 21 and 22 of arrow A.
It can be rotated in the 6 and A5 directions, and the rotation can be controlled from outside the box. Also in the same figure, 23
indicates the lid.

Further, 26 is a wheel, and 27 is a boat for communicating with a vacuum pump (FIG. 3). Further, in FIG. 2, 28 indicates a door, and 29 indicates a peephole. The molding box 7 at the right end in FIG. 2 has an opening 2 (not shown) formed in the side wall 1 on the left side of the figure. Further, the shelf 30 provided in the deaeration box 10 is formed to be detachable.

The defoaming box 10, the molding box 7, etc. connected to the molding box 7 are connected by running on rails 20 using wheels 26. This allows the opening 2 and the communication port 9 to communicate well. Further, the gasket 24 may be attached in advance to the outside of the opening 2 and the communication port 9, or may be formed separately and detachably. In FIG. 4, 31 is an operation panel, 32 is a handle for rotating the catalyst tank 6 and stirring tank 5, and 33 is a tightening device.

The device formed in this way can practically form molded products of any length by using the molding box 7, the deaeration box 10, and the blocking plate 11, or a combination of these as appropriate. ing. Note that the molding device used in that case is not shown.

Effects of the invention Since this invention is formed as described above, it is also possible to mold a so-called long object that is larger than the molding box 7, and unlike the conventional molding box 7.
Smaller molded products can also be molded.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of this invention, and is a sectional view of a part of the vacuum casting device, Fig. 2 is a front view of the same vacuum casting device, Fig. 3 is a view taken along the - line in Fig. 2, and Fig. 4 is a sectional view of a part of the vacuum casting device.
The figure is a view taken along the - line in Fig. 2, Fig. 5 is a sectional view of the blocking plate used in this device, Fig. 6 is a sectional view of the defoaming box used in this device, and Fig. 7 is a conventional vacuum casting method. FIG. 2 is a cross-sectional view of the device. 1... Side wall, 2... Opening, 3... Molding device, 4
... Stirring device, 5 ... Stirring tank, 6 ... Catalyst tank, 7
...Molding box, 8...Side wall, 9...Communication port, 10...
... Degassing box, 11... Shutoff plate, 12... Vacuum pump, 13... Hole, 24... Packing.

Claims (1)

[Claims for Utility Model Registration] 1. A molding box 7 having an opening 2 in a side wall 1 and having a molding device 3, a stirring device 4, a stirring tank 5, and a catalyst tank 6;
A deaeration box 10 having a communication port 9 in the side wall 8; a blocking plate 11 formed larger than the opening 2 and the communication port 9; a vacuum pump 12 communicating with the molding box 7 and the deaeration box 10; A gasket 2 that is larger than the communication port 9 and has a hole 13
A vacuum casting device characterized by comprising four parts. 2. The vacuum casting apparatus according to claim 1, wherein the communication port 9 of the defoaming box 10 is formed on both side walls 8, 8 of the defoaming box 10, respectively.