CN213162940U

CN213162940U - Lost foam casting device

Info

Publication number: CN213162940U
Application number: CN202021023674.0U
Authority: CN
Inventors: 王湘军
Original assignee: Hunan Huanqiu Machinery Casting Co ltd
Current assignee: Hunan Huanqiu Machinery Casting Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-05-11
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a lost foam casting device, which comprises a casting box, wherein an inner box body is arranged in the casting box; a plurality of through holes are uniformly formed on the inner box body; a filter layer is laid on the inner surface of the inner box body; a spacing cavity is formed between the casting box and the inner box body, and the bottom of the spacing cavity is communicated with the bottom of the water tank through a communicating pipe; the communicating pipe is provided with a negative pressure device and a one-way valve; a filter screen is arranged in the middle of the water tank, the top of the water tank is communicated with a filter, an active carbon filter layer is fixed in the filter, and an air outlet pipe is arranged at the top of the filter; the top of the inner box body is communicated with an air inlet pipe, and an electromagnetic valve is arranged on the air inlet pipe; the top of the casting box is provided with a cover body; the casting box is provided with a vibrator. The utility model discloses simple structure, the preparation is convenient, and when finalizing the design to the molding sand, interior box suction everywhere is more even to guaranteed the homogeneity that the molding sand was finalized the design, and accelerated the cooling process after the section bar takes shape, prevented air pollution.

Description

Lost foam casting device

Technical Field

The utility model belongs to the field of machinery, especially, relate to a lost foam casting device.

Background

The lost foam casting is full mold casting of a foam plastic mold by adopting a binder-free dry sand combined vacuumizing technology, the mold of the lost foam mold is buried into a casting box body containing fixed molding sand before casting, the molding sand is fixed by vibration and vacuumizing, then molten metal is poured, the foam mold is gasified by the high-temperature metal, the liquid metal occupies the position of the mold, and a casting is formed after solidification and cooling. However, the existing casting device is evacuated to an air suction port formed in the cover body, so that the inside gas of the molding sand is not uniformly absorbed, and the molding sand is easily fixed and is not firm, particularly, the molding sand is located at the bottom. In addition, the conventional casting device can only wait for the casting to cool slowly after the molten metal is poured, which takes a long time. Finally, the foam plastic beads for manufacturing the lost foam are heated and decomposed into gas during pouring, and the gas is organic gas with pollution and easily pollutes air.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a lost foam casting device. The utility model discloses simple structure, the preparation is convenient, and when finalizing the design to the molding sand, interior box suction everywhere is more even to guaranteed the homogeneity that the molding sand was finalized the design, and accelerated the cooling process after the section bar takes shape, prevented air pollution.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a lost foam casting device comprises a casting box, wherein an inner box body is arranged in the casting box; a plurality of through holes are uniformly formed on the inner box body; a filter layer is laid on the inner surface of the inner box body; a spacing cavity is formed between the casting box and the inner box body, and the bottom of the spacing cavity is communicated with the bottom of the water tank through a communicating pipe; the communicating pipe is provided with a negative pressure device and a one-way valve; a filter screen is arranged in the middle of the water tank, the top of the water tank is communicated with a filter, an active carbon filter layer is fixed in the filter, and an air outlet pipe is arranged at the top of the filter; the top of the inner box body is communicated with an air inlet pipe, and an electromagnetic valve is arranged on the air inlet pipe; the top of the casting box is provided with a cover body; the casting box is provided with a vibrator.

In a further improvement, the inner box body is fixed with the casting box through a supporting block.

In a further improvement, the negative pressure device is an air pump.

In a further improvement, the filter layer is filter cloth.

In a further improvement, the vibrator is a bin wall vibrator.

Further improvement, the casting case is connected with the lid is articulated, installs the handle on the lid.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

Example 1

The lost foam casting device shown in fig. 1 comprises a casting box 1, wherein an inner box body 2 is arranged in the casting box 1; a plurality of through holes 3 are uniformly formed on the inner box body 2; a filter layer 4 is laid on the inner surface of the inner box body 2; a spacing cavity 5 is formed between the casting box 1 and the inner box body 2, and the bottom of the spacing cavity 5 is communicated with the bottom of a water tank 7 through a communicating pipe 6; the communicating pipe 6 is provided with a negative pressure device 27 and a one-way valve 8; a filter screen 9 is arranged in the middle of the water tank 7, the top of the water tank 7 is communicated with a filter 10, an activated carbon filter layer 11 is fixed in the filter 10, and an air outlet pipe 12 is arranged at the top of the filter 10; the top of the inner box body 2 is communicated with an air inlet pipe 13, and the air inlet pipe 13 is provided with an electromagnetic valve 14; the top of the casting box 1 is provided with a cover body 15; a vibrator 16 is mounted on the casting box 1.

The inner box body 2 is fixed with the casting box 1 through a supporting block 17. The negative pressure device 27 is an air pump. The filter layer 4 is filter cloth. The vibrator 16 is a bin wall vibrator. The casting box 1 is hinged with a cover body 15, and a handle 18 is arranged on the cover body 15.

The utility model discloses the use as follows:

the method comprises the steps of firstly paving a layer of molding sand on an inner box body 2, then putting the lost foam into the inner box body to continuously lay the molding sand until the lost foam is buried, then closing a cover body 15 to start a vibrator 16 and an air pump, so that the molding sand is shaped, then opening the cover body 15 to pour molten metal, gasifying the molten metal to form a forming material, then closing the cover body 15, opening an electromagnetic valve 14 so that external air enters and cools the formed section through a spacing cavity 5, so that the cooling of the section is accelerated, and sucked gas enters a filter after water absorbs dust and silt in the air, and organic gas in the air is absorbed by an active carbon filter layer 11 so as to prevent the air from being polluted. Because the air pump carries out the negative pressure through compartment 5 and through-hole 3 and bleeds, consequently all form comparatively suction everywhere to the molding sand, consequently can be with the gaseous abundant suction between the molding sand for the molding sand design is more even, and the section bar cools down comparatively evenly everywhere when also making the cooling.

While the embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and embodiments, but is capable of being applied in all kinds of fields adapted to the invention, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the details shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. The lost foam casting device comprises a casting box (1), and is characterized in that an inner box body (2) is arranged in the casting box (1); a plurality of through holes (3) are uniformly formed on the inner box body (2); a filter layer (4) is laid on the inner surface of the inner box body (2); a spacing cavity (5) is formed between the casting box (1) and the inner box body (2), and the bottom of the spacing cavity (5) is communicated with the bottom of a water tank (7) through a communicating pipe (6); a negative pressure device (27) and a one-way valve (8) are arranged on the communicating pipe (6); a filter screen (9) is arranged in the middle of the water tank (7), the top of the water tank (7) is communicated with a filter (10), an active carbon filter layer (11) is fixed in the filter (10), and an air outlet pipe (12) is arranged at the top of the filter (10); the top of the inner box body (2) is communicated with an air inlet pipe (13), and the air inlet pipe (13) is provided with an electromagnetic valve (14); the top of the casting box (1) is provided with a cover body (15); a vibrator (16) is arranged on the casting box (1).

2. A lost foam casting apparatus as claimed in claim 1, wherein said inner box (2) is fixed to the casting box (1) by means of support blocks (17).

3. A lost foam casting apparatus as claimed in claim 1, wherein said negative pressure means (27) is an air pump.

4. A lost foam casting apparatus as claimed in claim 1, wherein said filter layer (4) is a filter cloth.

5. A lost foam casting apparatus as claimed in claim 1, wherein said vibrator (16) is a silo wall vibrator.

6. A lost foam casting apparatus as claimed in claim 1, wherein said casting box (1) is hingedly connected to a cover (15), said cover (15) having a handle (18) mounted thereon.