Riser-free gating system for upper flanges used for compressor and production technique of upper flanges

Abstract

The invention belongs to the field of gating machining, and discloses a riser-free pouring system for upper flanges used for a compressor; the riser-free gating system comprises a sand mould casting mould; multiple cavities matched with the shapes of the upper flanges are formed in the sand mould casting mould; a sprue cup, a cross runner, vertical runners and inner sprues which are sequentially connected are arranged in the sand mould casting mould; the inner sprues communicate with the cavities; each inner sprue is of a wedge-shaped sheet structure; exhausting bars are connected to the cavities; a decompression groove is formed in each vertical runner; multiple spoke grooves corresponding to spokes of the upper flange are formed in the cavities; at least one spoke groove faces to the corresponding inner sprue; and the decompression grooves are located between the two rows of cavities which are arranged up and down. According to the system, positions of hot spot circles can be controlled, so that molten iron mould filling is stable, and turbulence is avoided; meanwhile, the invention further provides a production technique; and comprehensive improvement of product quality is realized by improving a formula.

Description

technical field [0001] The invention relates to the field of casting processing, in particular to an upper flange non-riser gating system for compressors and a production process for the upper flange. Background technique [0002] With the continuous advancement of science and technology, people's living standards are improving day by day, people's awareness of environmental protection is also improving, and they have higher requirements for the quality of life. Corresponding to the home appliances that are closely related to every family, higher requirements are also put forward. Taking air conditioners as an example, people are now paying more attention to the energy saving, environmental protection, quietness and comfort of air conditioners, so they have put forward higher requirements for air conditioner manufacturers, and therefore put forward higher requirements for the performance of compressors, which are the core components of air conditioners. As one of the excell...

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Problems solved by technology

[0007] This scheme is an effective solution; but the product produced by the present application is a flange, which is provided with a plurality of thinner spokes, adopts the traditional riser feeding casting process, and the feeding channel is too long, and the feeding channel is too long. The shrinkage effect is not ideal, and the interaction of the temperature field causes the hot nodes of the casting to move outward, resulting in a slight non-densification phenomenon after the inner hole of some castings is processed, which cannot meet the customer's requirements for high-quality and high-performance products; using the above methods Unable to solve the corresponding technical problems

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