CN219074331U

CN219074331U - Low pressure casting mould filtration convenient to retrieve aluminium scrap

Info

Publication number: CN219074331U
Application number: CN202223100801.4U
Authority: CN
Inventors: 黄耀松
Original assignee: Wuxi Sinan Technology Co ltd
Current assignee: Wuxi Sinan Technology Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-05-26
Anticipated expiration: 2032-11-22

Abstract

The utility model relates to the technical field of low-pressure casting dies, in particular to a low-pressure casting die filtering structure convenient for recycling waste aluminum. The casting mold comprises a low-pressure upper mold and a low-pressure lower mold which are arranged up and down correspondingly, wherein casting molding cavities are arranged in the low-pressure upper mold and the low-pressure lower mold, a sprue bush is arranged right below the casting molding cavities, a liquid inlet cavity which penetrates up and down is arranged in the sprue bush, and the casting molding cavities are communicated with a liquid lifting pipe up and down through the liquid inlet cavity; the stainless steel filter screen is arranged in the liquid inlet cavity, the size of the cross section of the liquid inlet cavity is reduced from top to bottom, and the stainless steel filter screen can be clamped and arranged in the liquid inlet cavity. According to the utility model, the stainless steel filter screen is added in the die, so that the aluminum water can be filtered and then enters the casting molding cavity, the influence of oxidized slag inclusion formed by secondary pollution in the aluminum liquid on the internal quality of the casting is eliminated, and the quality stability of the casting is improved.

Description

Low pressure casting mould filtration convenient to retrieve aluminium scrap

Technical Field

The utility model relates to the technical field of low-pressure casting dies, in particular to a low-pressure casting die filtering structure convenient for recycling waste aluminum.

Background

In the casting process, the low-pressure casting die is quite high in casting yield and simple to operate and easy to automate because a riser and an external pouring gate are not required to be arranged, so that the low-pressure casting die is widely applied in recent years.

In the prior art, when a low-pressure casting mold is used for casting, aluminum liquid in a heat preservation furnace below the mold is injected from a bottom gate part of the mold by inputting compressed air into the furnace, and the pressure is maintained until solidification is started, so that casting is completed.

However, the aluminum liquid is easy to be secondarily polluted in the heat preservation furnace under the influence of compressed air, so that the aluminum liquid containing impurities is easy to form oxide slag inclusion during the in-mold molding of the aluminum liquid containing impurities, and the quality stability of casting products is affected, so that a filtering mechanism is required to be added to filter the aluminum liquid in the furnace.

Disclosure of Invention

Aiming at the defects in the prior art, the low-pressure casting die filtering structure is convenient for recycling waste aluminum, molten aluminum can enter a die cavity after being filtered, the influence of oxidized slag inclusion formed by secondary pollution in molten aluminum on the internal quality of a casting is eliminated, and the quality stability of the casting is improved; meanwhile, the filtering structure is made of stainless steel and has a difference with the melting point of aluminum, so that follow-up waste materials can be conveniently separated, waste aluminum can be conveniently recovered, a damaged steel filter screen is convenient to recycle, the material utilization rate is improved, and the production cost is reduced.

The technical scheme adopted by the utility model is as follows:

the low-pressure casting die filtering structure comprises a low-pressure upper die and a low-pressure lower die which are arranged up and down correspondingly, wherein casting molding cavities are arranged in the low-pressure upper die and the low-pressure lower die, a sprue bush is arranged right below the casting molding cavities and is fixed in the low-pressure lower die, a liquid lifting pipe is arranged right below the sprue bush, and a liquid inlet cavity which is communicated up and down is arranged in the sprue bush and communicates the casting molding cavities with the liquid lifting pipe up and down; the stainless steel filter screen is arranged in the liquid inlet cavity, the size of the cross section of the liquid inlet cavity is reduced from top to bottom, and the stainless steel filter screen can be clamped and arranged in the liquid inlet cavity.

Furthermore, the liquid inlet cavity is in a truncated cone structure.

Further, the stainless steel filter screen sets up the round turn-ups along the edge, turn-ups and stainless steel filter screen integrated into one piece, turn-ups and feed liquor intracavity inside wall compress tightly the contact.

Further, the flanging angle A of the flanging is larger than the flow channel draft angle B.

The beneficial effects of the utility model are as follows:

according to the utility model, the stainless steel filter screen is added in the die, so that the aluminum water can be filtered and then enters the casting molding cavity, so that the influence of oxidized slag inclusion formed by secondary pollution in the aluminum liquid on the internal quality of the casting is eliminated, and the quality stability of the casting is improved; the stainless steel filter screen is provided with a flanging, and the flanging is stressed to elastically deform when being installed, so that the stainless steel filter screen can be more reliably clamped at the liquid inlet cavity of the sprue bush, and the filter screen is prevented from falling off and displacing due to the impact of aluminum liquid; because the filter screen is stainless steel, stainless steel and aluminum have different melting points, the subsequent waste materials can be conveniently separated, the waste aluminum and the damaged steel filter screen can be conveniently and separately recovered, the material utilization rate is improved, and the production cost is reduced.

Drawings

Fig. 1 is a front semi-sectional view of the present utility model.

Fig. 2 is an enlarged view of fig. 1 at C.

Fig. 3 is a perspective view of a stainless steel filter screen.

Fig. 4 is a schematic diagram of molten aluminum casting by a low pressure casting die.

Wherein: 1. low pressure upper die; 2. a lower pressure die; 3. casting forming cavity; 4. a sprue bush; 5. stainless steel filter screen; 6. a liquid inlet cavity; 7. a lift tube; 8. and (5) flanging.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1 and 2, a low pressure casting die filtering structure convenient for recycling aluminum scraps comprises a low pressure upper die 1 and a low pressure lower die 2 which are arranged up and down correspondingly, wherein casting molding cavities 3 are arranged in the low pressure upper die 1 and the low pressure lower die 2, a sprue bush 4 is arranged right below the casting molding cavities 3, the sprue bush 4 is fixed in the low pressure lower die 2, a liquid lifting pipe 7 is arranged right below the sprue bush 4, a liquid inlet cavity 6 which is communicated up and down is arranged in the sprue bush 4, and the liquid inlet cavity 6 is used for communicating the casting molding cavities 3 with the liquid lifting pipe 7 up and down.

As shown in fig. 1 and 2, a stainless steel filter screen 5 is arranged in the liquid inlet cavity 6, and during casting, aluminum liquid enters the liquid inlet cavity 6 along a liquid lifting pipe 7 and then enters the casting forming cavity 3 for forming. The stainless steel filter screen 5 in the liquid inlet cavity 6 can filter impurities in the aluminum liquid, and ensures the stability of the molding quality in the casting molding cavity 3.

In order to ensure that the stainless steel filter screen 5 can be stably installed, as shown in fig. 3, the liquid inlet cavity 6 is of a truncated cone structure, the size of the cross section of the liquid inlet cavity 6 is reduced from top to bottom, and the stainless steel filter screen 5 can be tightly clamped in the liquid inlet cavity 6 from top to bottom.

As shown in fig. 3, the stainless steel filter screen 5 is provided with a circle of flanging 8 along the edge, and the flanging 8 and the stainless steel filter screen 5 are integrally formed. The flange 8 is in compression contact with the inner side wall of the liquid inlet cavity 6, the contact area between the stainless steel filter screen 5 and the side wall of the liquid inlet cavity 6 is increased by the flange 8, and the installation stability of the stainless steel filter screen 5 is improved.

As shown in fig. 3, the flanging angle a of the flanging 8 is larger than the runner draft angle B, so that the flanging 8 is conveniently clamped on the side wall of the liquid inlet cavity 6, and after the stainless steel filter screen 5 is placed in place, the flanging 8 of the stainless steel filter screen 5 is elastically deformed under the stress, so that the stainless steel filter screen 5 can be more reliably clamped at the liquid inlet cavity 6 of the sprue bush 4.

When the utility model is used, as shown in fig. 4, the mold is opened first, then the special tool is used for plugging the stainless steel filter screen 5 into the sprue bush 4, and the stainless steel filter screen 5 can be stably clamped at the sprue bush 4 because the flanging angle A of the flanging 8 is larger than the runner mold drawing angle B. Closing the mould, starting to inject compressed air into the heat preservation furnace, allowing the aluminum liquid to move downwards under the action of force, lifting the liquid level in the liquid lifting pipe 7, starting to inject the aluminum liquid into the casting molding cavity 3 from the sprue bush 4, and starting to filter the aluminum liquid by the stainless steel filter screen 5 at the moment, so as to ensure the cleanliness of the aluminum liquid entering the casting molding cavity 3. After casting is finished, the stainless steel filter screen 5 is wrapped at the position of a casting runner by solidified aluminum liquid, the runner at the runner position is sawn in the subsequent working procedure, the sawn runner part can be put into a smelting furnace, and the stainless steel has a melting point far higher than that of aluminum alloy and only metal and other impurities are not contained in the stainless steel, so that waste materials can be directly recovered into aluminum ingots and scrap steel filter screens which can be used for secondary refining, and the production cost is greatly saved.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims

1. The utility model provides a low pressure casting mould filtration convenient to retrieve aluminium scrap, includes mould (1) and low pressure lower mould (2) on the low pressure that corresponds the setting from top to bottom, its characterized in that: the casting mold comprises a low-pressure upper mold (1) and a low-pressure lower mold (2), wherein a casting molding cavity (3) is formed in the low-pressure upper mold (1) and the low-pressure lower mold (2), a sprue bush (4) is arranged right below the casting molding cavity (3), the sprue bush (4) is fixed in the low-pressure lower mold (2), a liquid lifting pipe (7) is arranged right below the sprue bush (4), a liquid inlet cavity (6) which is vertically communicated is formed in the sprue bush (4), and the casting molding cavity (3) is vertically communicated with the liquid lifting pipe (7) through the liquid inlet cavity (6); the stainless steel filter screen (5) is arranged in the liquid inlet cavity (6), the size of the cross section of the liquid inlet cavity (6) is reduced from top to bottom, and the stainless steel filter screen (5) can be tightly clamped in the liquid inlet cavity (6).

2. A low pressure casting die filter structure for facilitating recycling of scrap aluminum as defined in claim 1, wherein: the liquid inlet cavity (6) is of a truncated cone structure.

3. A low pressure casting die filter structure for facilitating recycling of scrap aluminum as set forth in claim 2, wherein: the stainless steel filter screen (5) sets up round turn-ups (8) along the edge, turn-ups (8) and stainless steel filter screen (5) integrated into one piece, turn-ups (8) and feed liquor chamber (6) inside wall compress tightly the contact.

4. A low pressure casting die filter structure for facilitating recycling of scrap aluminum as defined in claim 3, wherein: the flanging angle A of the flanging (8) is larger than the flow channel die drawing angle B.