lost foam casting method

Abstract

The invention belongs to the field of casting methods for evanescent moulds, and particularly discloses a casting method for an evanescent mould. The casting method comprises the steps that a sand box is mounted and filled with bottom sand; a foam plastic gasification mould is put into the sand box; an opening of the sand box is covered with a plastic film; casting is conducted; and a piece is taken out. In the step that the opening of the sand box is covered with the plastic film, a sucking pump is started, the plastic film is sucked to a baffle, an electromagnet is energized with forward current, a cutting tool moves along with a magnet in the direction away from the electromagnet, and the protruding plastic film is cut when a blade move; and after cutting is completed, the sucking pump is stopped, the electromagnet is energized with reverse current, the magnet drives the cutting tool to move towards the electromagnet, and the cutting tool is returned to the initial position. According to the scheme, the casting method, for the evanescent mould, that the plastic film can be cut automatically and continuously through a cutting device is provided.

Description

technical field [0001] The invention relates to the field of lost foam casting methods. Background technique [0002] At present, in the existing lost foam casting process, when working, after the finished mold is loaded into the sand box, the sand box moves forward, and the front sand box drags the plastic film to move forward. When it moves to the sand adding equipment , start to add sand to the sand box, the sand box after adding sand needs to be covered with a plastic film on the mouth of the sand box to seal, the plastic film needs to be cut into a fixed size when covering, and the automatic cutting device of the cylinder is used in the prior art. Plastic film is cut, but compressed air is needed when the cylinder is working. When the supply of compressed air is insufficient, the production progress will be affected, resulting in the cutting device not being able to cut continuously, thereby reducing work efficiency. Contents of the invention [0003] The present inv...

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing lost foam casting process, when working, after the finished mold is loaded into the sand box, the sand box moves forward, and the front sand box drags the plastic film to move forward. When it moves to the sand adding equipment , start to add sand to the sand box, the sand box after adding sand needs to be covered with a plastic film on the mouth of the sand box to seal, the plastic film needs to be cut into a fixed size when covering, and the automatic cutting device of the cylinder is used in the prior art. Plastic film is cut, but compressed air is needed when the cylinder is working. When the supply of compressed air is insufficient, the production progress will be affected, resulting in the cutting device not being able to cut continuously, thereby reducing work efficiency.

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