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Precise bubble-free casting process for hardware castings

A casting process and a technology without air bubbles, which is applied in the field of casting castings. It can solve the problems of affecting the production efficiency of the casing, the casing is prone to bubbles, and the strength of the casing is reduced, so as to reduce intrusive air bubbles, improve production efficiency, and improve casting accuracy. Effect

Inactive Publication Date: 2021-03-02
黄勇平
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when casting metal casings, air bubbles (pores) are likely to appear on the casing, and the air bubbles will reduce the strength of the casing, leading to the scrapping of the casing, thereby greatly reducing the yield, not only causing waste of resources, but also Affect the production efficiency of casing

Method used

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  • Precise bubble-free casting process for hardware castings
  • Precise bubble-free casting process for hardware castings
  • Precise bubble-free casting process for hardware castings

Examples

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Embodiment 1

[0046] see Figure 1-6 , a precision bubble-free casting process for metal castings, comprising the following steps:

[0047] S1. Put the core 105 between the upper sand mold 102 and the lower sand mold 104, align the core 105 through the core head 106 and the positioning groove 107, and complete the assembly of the casting device;

[0048] S2. Putting the metal raw material into the smelting equipment, smelting the metal raw material to obtain molten metal, and the temperature of the molten metal is 750-785°C;

[0049] S3. Pouring the molten metal in S2 into the mold cavity 108 through the pouring and degassing pipe 002, and controlling the pouring temperature between 730-745°C;

[0050] S4. After the molten metal is solidified, a blank casting is obtained, and the blank casting is taken out and cleaned, and then polished after cleaning;

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Abstract

The invention discloses a precise bubble-free casting process for hardware castings, and belongs to the technical field of casting. A specially-made casting device is arranged, and a hardware sleeve is cast through the casting device. A core vent hole and an inner through core hole are formed in the casting device, so that gas generated at a core head can flow out conveniently in the casting process, and then the generation of invasive bubbles can be effectively reduced. A pouring liquid gas evolution pipe is arranged in the casting device, so that a dual acceleration effect can be provided for molten metal, therefore the evolution of gas in the molten metal is remarkably improved, and the generation of evolved bubbles is reduced. A cavity self-gas-leakage assembly is arranged in the casting device, so that the outflow of gas generated by pouring in a cavity can be facilitated, and therefore the generation of invasive bubbles is further reduced. The bubbles can be effectively preventedfrom appearing on the hardware sleeve from the reason of bubble generation, so that the yield of the sleeve is remarkably improved, resources are saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of casting castings, in particular to a precision bubble-free casting process for metal castings. Background technique [0002] Castings are metal shaped objects obtained by various casting methods, that is, the smelted liquid metal is poured into the pre-prepared mold by pouring, injection, suction or other casting methods, and after cooling, it is polished and other subsequent processing methods , the resulting object has a certain shape, size and performance. The uses of castings are very extensive, and their uses are showing a trend of continuous expansion. They have been specifically used in construction, hardware, equipment, machine tools, ships, aerospace, automobiles, locomotives, electronics, computers, electrical appliances, lamps and other industries. Castings in the hardware industry are collectively referred to as hardware castings. [0003] Metal casing is one of the common metal castings, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/08B22C9/10B22C9/24
CPCB22C9/02B22C9/082B22C9/10B22C9/108B22C9/24
Inventor 黄勇平
Owner 黄勇平
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