Vacuum degreasing furnace

Abstract

The invention relates to a vacuum degreasing furnace which comprises a furnace shell with an internal degreasing furnace body. A vacuum device, a circulating cooling device and a degreasing device which are connected through a pipeline are arranged on the outer side of the furnace shell. The degreasing furnace body is a seal cavity with a round section, guide grooves are formed in the inner wall of the seal cavity, and reinforcing rib rings are hooped on the outer wall of the seal cavity. The vacuum degreasing furnace is simple in structure, no grease accumulation dead space exists inside the degreasing furnace body, full degreasing effect is achieved, and degreasing effect is greatly improved; deformation-resisting capability of the degreasing furnace body is improved, and service life of the degreasing furnace body is prolonged; in addition, the external circulating cooling device is utilized, so that cooling time is greatly shortened, and degreasing efficiency is improved.

Description

technical field [0001] The invention relates to a degreasing furnace, in particular to a vacuum degreasing furnace. Background technique [0002] Metal Injection Molding (MIM) is a new powder metallurgy molding technology that can maximize the content of metal particles and completely remove the binder and densify the molded body during the subsequent sintering process. The process of removing the binder contained in the body before sintering the compact is called degreasing. [0003] In the degreasing process, the molded body is put into a degreasing furnace, and the binder in the molded body is removed by thermal decomposition, and then the molded body from which the binder has been removed is cooled rapidly and taken out. Existing vacuum degreasing furnaces use vacuum or carrier gas for degreasing, and vacuum devices, cooling devices, and degreasing devices are usually installed inside or outside the furnace; the cross-section of existing degreasing furnaces is squar...

AI Technical Summary

Problems solved by technology

Existing vacuum degreasing furnaces use vacuum or carrier gas for degreasing, and vacuum devices, cooling devices, and degreasing devices are usually installed inside or outside the furnace; the cross-section of existing degreasing furnaces is square, and the molded blank is placed In the sealed cavity, the adhesive in the forming blank decomposes under the action of high temperature to produce grease (wax) and degreasing gas, the grease flows into the grease collecting tank along the inner wall of the sealed cavity, and the degreasing gas is discharged with the directional airflow; because the existing degreasing The cross-section of the furnace is square, and the grease seeps out from the molded body. The grease flows through the square inner wall of the degreasing furnace, and it will meet resistance at the corners, resulting in the incomplete discharge of the grease, incomplete degreasing, and pollution of the molded body. In the subsequent sintering In the process of processing, the finished product is delaminated, has pores, and defective products on the outlet line

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