Fired mold precision casting dewaxing filter device

Abstract

The invention discloses a fired mold precision casting dewaxing filter device. The device comprises a supporting frame, an upper layer of filter plate, a middle layer of filter plate and a lower layerof filter plate, wherein the supporting frame is a rectangular supporting framework, the upper surface and the lower surface of the supporting frame are welded to the upper layer of filter plate andthe lower layer of filter plate respectively, the middle of the supporting frame is welded to the middle layer of filter plate, the upper layer of filter plate is composed of a plurality of filter strips which are arranged in parallel, the filter strips are L-shaped composite steel boards, the openings of the filter strips face down, gaps exist between adjacent filter strips, and the upper layer of filter plate, the middle layer of filter plate and the lower layer of filter plate are arranged to be crossed. The dewaxing filter device is characterized in that, by arranging the upper layer of filter plate, the middle layer of filter plate and the lower layer of filter plate with the openings facing down and being crossed, boiling wax liquid is filtered by the dewaxing filter device, so thatsand particles are prevented from polluting a mold case in the boiling process of the wax liquid, occurrence of sand inclusion defects of products is reduced, and the device is simple in structure, low in cost and applicable for being popularized.

Description

technical field [0001] The invention relates to a steam dewaxing kettle, in particular to an investment casting precision casting dewaxing filter device. Background technique [0002] The basic process of investment casting can be divided into wax mold making, shell making and roasting and pouring. Since the mold shell plays a key role in the quality of the cast part, the manufacture of the mold shell itself is critical. Common shell manufacturing processes include: cleaning and degreasing of wax patterns, coating and sanding of wax patterns, steel casting of shells, dewaxing and shell baking; due to the high melting point of wax pattern materials for precision casting , usually using a special dewaxing kettle to complete the dewaxing process; most of the existing dewaxing kettles are horizontal. It flows downward under the action of gravity; during the dewaxing process of the dewaxing kettle, because the temperature in the kettle is 160 degrees higher than the melting poi...

AI Technical Summary

Problems solved by technology

Common shell manufacturing processes include: cleaning and degreasing of wax patterns, coating and sanding of wax patterns, steel casting of shells, dewaxing and shell baking; due to the high melting point of wax pattern materials for precision casting , usually using a special dewaxing kettle to complete the dewaxing process; most of the existing dewaxing kettles are horizontal. It flows downward under the action of gravity; during the dewaxing process of the dewaxing kettle, because the temperature in the kettle is 160 degrees higher than the melting point of the wax material is only over 60 degrees, the wax liquid will boil at the bottom of the dewaxing kettle, and the mold Some sand particles falling off from the shell will adhere to the sprue cup with the boiling of the wax liquid. If these sand particles are not cleaned from the mold shell during the roasting and cleaning process, the casting will have sand inclusion defects.

Images