Automobile gearbox shell body pressure casting technology

Abstract

The invention belongs to the technical field of pressure casting technologies, and particularly relates to an automobile gearbox shell body pressure casting technology which comprises a first step of preparation before pressure casting; a second step of a pressure casting process, namely a releasing agent layer is first coated on the surface of a pressure casting mould, then a pulling core is inserted, the inserting order of the pulling core is from a movable block, a front slide block and a back slide block to a left slide block and a right slide block, mould assembly is carried out next, pressure injection is carried out after mould assembly is finished, demoulding is carried out after the pressure injection, the pulling core is pulled out after the demoulding is finished, the pulling order of the pulling core from the left slide block and the right slide block to the front slide block and the back slide block, a blank is taken out finally, and a pushing device is used for pushing out the movable block; and a third step of pressure-casting postprocessing. The purposes of the automobile gearbox shell body pressure casting technology are that the multiple problems that an existing automobile gearbox shell body black sand casting technology is low in production efficiency, low in product pass rate, bad in production environment, high in production cost, not suitable for automobile light weight and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of die-casting technology, and in particular relates to the die-casting technology of an automobile transmission case. Background technique [0002] Most of the original automobile transmission housings produced at home and abroad are made of black sand casting technology, and the material used is cast iron. This casting process has the following defects: [0003] 1. The production efficiency is low, and only one product can be made every 12 to 15 minutes; [0004] 2. It is difficult to shake the sand in the sand mold, and the sand is easy to stay in the product, resulting in a low pass rate of the product; [0005] 3. The raw material of the sand mold is resin sand, which is highly polluted and has a strong pungent smell, resulting in a poor production environment; [0006] 4. Sand molds cannot be reused, resulting in higher production costs; [0007] 5. The riser is large, which wastes materials and le...

AI Technical Summary

Problems solved by technology

[0009] Purpose of the present invention: In order to solve many problems such as low production efficiency, low product qualification rate, harsh production environment, high production cost and unsuitability for automobile lightweight in the existing automobile transmission housing black sand casting process, and propose an automobile Transmission housing die-casting process

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