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Casting process of an improved vehicle box

A casting process and improved technology, applied in the field of aluminum alloy casting, can solve the problems of poor air tightness, unclear outline, air holes, etc., and achieve the effects of reducing scrap rate, not easy to link dislocation, and accurate positioning

Active Publication Date: 2020-07-10
四川省犍为恒益铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor airtightness of the castings for vehicle exhaust gas treatment produced by the existing low-pressure casting process, the purpose of the present invention is to provide an improved casting process for the vehicle box, which can effectively ensure the airtightness requirements of the box castings , to avoid defects such as casting pores, undercasting or unclear contours

Method used

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  • Casting process of an improved vehicle box
  • Casting process of an improved vehicle box
  • Casting process of an improved vehicle box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Please refer to Figure 1 to Figure 5 As shown, this embodiment provides a casting process for an improved vehicle box, including the following process steps:

[0046] (a) Make a sand core assembly, use resin sand to make a block type sand core assembly according to the shape of the vehicle exhaust gas treatment box, the block type sand core assembly includes a main sand core 9, a water channel sand core 10, a small water channel sand Core 11, lap sand core 13 and cross sand core 12; make main sand core 9 and channel sand core 10 assembly molds, small water channel sand core 11 and lap sub sand core 13 assembly molds and cross sand core 12 moulds, then cover The film sand is injected into the sand core mold, the temperature of the sand core mold is 270°C, the sand injection pressure is 0.7Mpa, and the sand injection time is 10s; then the main sand core 9 is hollowed out, and the side wall of the main sand core 9 is hollowed out The solidification depth is 18mm; and bru...

Embodiment 2

[0063] Please refer to Figure 1 to Figure 5 As shown, this embodiment provides a casting process for an improved vehicle box, including the following process steps:

[0064] (a) Make a sand core assembly, use resin sand to make a block type sand core assembly according to the shape of the vehicle exhaust gas treatment box, the block type sand core assembly includes a main sand core 9, a water channel sand core 10, a small water channel sand Core 11, lap sand core 13 and cross sand core 12; make main sand core 9 and channel sand core 10 assembly molds, small water channel sand core 11 and lap sub sand core 13 assembly molds and cross sand core 12 moulds, then cover The film sand is injected into the sand core mold, the temperature of the sand core mold is 280°C, the sand injection pressure is 0.6Mpa, and the sand injection time is 8s; then the main sand core 9 is hollowed out, and the side wall of the main sand core 9 is hollowed out The solidification depth is 15mm; and brus...

Embodiment 3

[0081] Please refer to Figure 1 to Figure 5 As shown, this embodiment provides a casting process for an improved vehicle box, including the following process steps:

[0082] (a) Make a sand core assembly, use resin sand to make a block type sand core assembly according to the shape of the vehicle exhaust gas treatment box, the block type sand core assembly includes a main sand core 9, a water channel sand core 10, a small water channel sand Core 11, lap sand core 13 and cross sand core 12; make main sand core 9 and channel sand core 10 assembly molds, small water channel sand core 11 and lap sub sand core 13 assembly molds and cross sand core 12 moulds, then cover The film sand is injected into the sand core mold, the temperature of the sand core mold is 250°C, the sand injection pressure is 0.5Mpa, and the sand injection time is 8s; then the main sand core 9 is hollowed out, and the side wall of the main sand core 9 is hollowed out The solidification depth is 20mm; and brus...

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Abstract

The invention discloses a casting technology of an improved vehicle box body, and relates to the technical field of aluminum alloy casting. The improved vehicle box body is to solve the problem that avehicle box body casting piece by adopting an existing low-pressure casting technology is poor in air tightness. The technology comprises the following steps of sand core assembly preparation, main sand core emptying-designing and mold shell body manufacturing, upper mold coating technology-mold assembling-alloy component matching and alloy fusion and refining, deoxygenation and drossing process-alloy solution transferred in a heat preserving furnace of a low-pressure casting machine for easy purifying treatment-casting process of alloy, namely, liquid ascending, mold filling, pressure maintaining and crystallization, decompression cooling-mold opening for taking the box body casting piece and the like. By means of the technology, the air tightness of the box body casting piece is effectively improved, the defects of shrinkage porosity of a casting piece box body, needle holes, air holes, slag inclusion and the like are avoided, the extension strength of a casting product is improvedby 30-42%, and the casting quality is significantly improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting, and more specifically relates to a casting process for an improved vehicle box. Background technique [0002] As the emission control of automobile exhaust in various countries in the world becomes more and more strict, the casting upgrade of commercial vehicle exhaust treatment box is an inevitable product. Due to the high efficiency and power requirements of the market vehicle engine, the company focused on improving the fluidity of the metal liquid in the casting cavity when developing the casting vehicle exhaust gas treatment box, and continuously improved the filling materials, metal molds and sand cores. Improve and customize special casting equipment for vehicle exhaust gas treatment boxes. [0003] The vehicle exhaust gas treatment box has a complex structure and uneven thickness; the thinnest part of the product is only 5mm, while the thickest part reaches 30mm, and the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04B22D18/08C22C21/04C22C1/02
CPCB22D18/04B22D18/08C22C1/026C22C21/04
Inventor 唐祖清黄志伟宋权岑际强黄剑彬
Owner 四川省犍为恒益铝业有限公司
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