Core making process of resin sand

Abstract

The invention discloses a core making process of resin sand. The core making process comprises the following steps that s1, resin, a curing agent and roughing sand are mixed in proportion to form mixed sand; s2, a releasing agent is brushed on a mold; s3, after the releasing agent is dried, a core box is closed, a core bar, a chilling block and a moving block are put in the core box, the core boxis fast filled with the mixed sand, and the mixed sand is pounded; s4, after the mixed sand is pounded, an air outlet needle or an air outlet rope is pulled out to form an exhaust channel; s5, after the surface of the mixed sand is hardened, the core box is opened; s6, after the sand is cured, core finishing is carried out, rough edges and burrs on the surface of the sand are removed, unfilled corners and holes are checked, repair paste is used for repairing, and finished sand can be obtained; s7, ethyl alcohol is added into coating for mixing, and the surface of the finished sand is evenly coated with the coating through a brush; and s8, after coating is completed, the coating is immediately ignited, sufficient combustion is achieved, after cooling, the finished sand is dried, and a resinsand core is obtained. According to the core making process, the resin, the curing agent and the roughing sand are mixed in proportion, and the made sand core is good in adhesion effect, stable in structure and smooth in surface.

Description

technical field [0001] The invention relates to the field of casting, in particular to a resin sand core-making process. Background technique [0002] Casting process is the technology and method of producing castings by applying casting related theory and systematic knowledge, including molding material preparation, modeling, core making, metal smelting, pouring and solidification control, etc. Core making is an important step in the casting process, and the manufactured core The quality of the mold directly affects the quality of the cast product. However, the sand core produced by the existing core-making process is prone to cracking and chipping, the surface is not smooth, and the exhaust channel is blocked, which leads to the surface of the final casting produced parts. Burrs or cracks, etc., image product quality. Contents of the invention [0003] In order to solve the above technical problems, the object of the present invention is to provide a resin sand core mak...

AI Technical Summary

Problems solved by technology

[0002] Casting process is the technology and method of producing castings by applying casting related theory and systematic knowledge, including molding material preparation, modeling, core making, metal smelting, pouring and solidification control, etc. Core making is an important step in the casting process, and the manufactured core The quality of the mold directly affects the quality of the cast product. However, the sand core produced by the existing core-making process is prone to cracking and chipping, the surface is not smooth, and the exhaust channel is blocked, which leads to the surface of the final casting produced parts. Conditions such as burrs or cracks, image product quality