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Low-pressure casting mold for aluminum gear chamber

A low-pressure casting and gear chamber technology, which is applied in the manufacture of tools, casting equipment, mechanical cleaning, etc., can solve the problems of low yield rate of molten aluminum, high shrinkage of products, and large thermal joints of the bosses in the inner cavity of gears, etc.

Pending Publication Date: 2022-07-01
XINXING HEAVY IND HUBEI 3611 MECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this type of concave aluminum gear chamber usually adopts the gravity casting process, but due to the large hot spot of the boss in the gear inner cavity, the feeding effect is poor, the product shrinks more, the aluminum liquid yield is low, and the oxidation slag is seriously generated.

Method used

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  • Low-pressure casting mold for aluminum gear chamber
  • Low-pressure casting mold for aluminum gear chamber
  • Low-pressure casting mold for aluminum gear chamber

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Embodiment Construction

[0019] figure 1 , 2 , 3, the present invention includes a metal mold composed of an upper mold 1 and a lower mold 6, and a gear inner cavity sand core 2 located in the metal mold cavity. The lower mold 6 is provided with two lower sprues, and the lower mold cylindrical pins (ie, positioning pins) 17 are positioned in cooperation with the sand core positioning holes 15. The runner inlet is connected to the ceramic liquid riser 4 . The lower part of the sand core in the inner cavity of the gear is provided with a middle sprue, a runner 10 and a gear feeding runner 11 . The runner 10 includes a horizontal runner section and a vertical runner section, and the cross-sections of the horizontal runner section and the vertical runner section are square. One side of the gear inner cavity sand core 2 forms the gear inner cavity shape of the joint surface of the flywheel shell, and the other side of the gear inner cavity sand core 2 is provided with the gear feeding runner 11 connecti...

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Abstract

A low-pressure casting mold for an aluminum gear chamber comprises a metal mold composed of an upper mold body and a lower mold body and a gear inner cavity sand core, an upper cavity of the upper mold body and a lower cavity of the lower mold body form a metal mold cavity, the upper portion of the gear inner cavity sand core is arranged in the lower cavity of the lower mold body, and a casting cavity is formed between the surface of the upper portion of the gear inner cavity sand core and the surface of the upper cavity of the upper mold body. The two sets of pouring systems are connected with a casting cavity, each pouring system comprises a straight pouring gate and a transverse pouring gate, each transverse pouring gate comprises a horizontal transverse pouring gate section and a vertical transverse pouring gate section, one end of each vertical transverse pouring gate section is connected with the inner end of the corresponding horizontal transverse pouring gate section, and the other end of each vertical transverse pouring gate section is connected with a gear feeding pouring gate; the gear feeding pouring gate is connected with a cavity located at the far end of the middle of the casting cavity and used for forming a gear inner cavity boss. The mold design integrally conforms to the casting solidification temperature field gradient, the casting can be prevented from being retained in the lower mold, deformation is reduced, and the pouring system is wide in feeding coverage and good in feeding effect.

Description

technical field [0001] The invention relates to an aluminum gear chamber casting mold, which belongs to the field of casting equipment. Background technique [0002] As one of the key components of the automobile engine, the gear chamber is installed between the cylinder block and the flywheel housing, externally connected to the cylinder head, starter, oil pan, and built-in gear assembly, which plays the role of connecting the body and the carrier. Gear chambers are generally divided into gray iron or aluminum alloys, but aluminum alloys are more suitable for lightweight development because of their light weight, so the market demand is also increasing. With the continuous improvement of the development of engine design integration, the aluminum gear chamber is complex in shape, large in size, and has a concave structure, which is a large aluminum alloy thin-walled part. At present, this type of concave aluminum gear chamber usually adopts the gravity casting process, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04B22D43/00
CPCB22D18/04B22D43/004
Inventor 刘海军
Owner XINXING HEAVY IND HUBEI 3611 MECHANICAL
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