Processing method for preventing porous mould of laboratory gene memory board from cracking

Abstract

The invention relates to a processing method for preventing a porous mould of a laboratory gene memory board from cracking, comprising the following steps: (1) the core of the mould is made of steel, bottom end slot position of a mould insert, which goes through grinding is molded into a filleted corner; (2) hot quenching is carried out at 1020 degrees; (3) copious cooling and tempering are carried out at -150 degrees; (4) low temperature tempering is carried out at 300 degree twice; (5) precision finishing is carried out on the steel, and as the mould is assembled after the precision finishing is finished; and (6) low temperature destressing tempering is performed on the mould within the range of 250-275 degrees after mould testing is qualified. The processing method of the invention solves the technical problem that the mould insert is frequently cracked and ensures the mould can keep favorable rigidity and optimum tenacity in the production process.

Description

technical field [0001] The invention relates to a processing method for preventing cracking of a porous mold of a laboratory gene storage plate. Background technique [0002] Known molds are mostly used for medical consumables such as laboratory gene storage boards. The mold is composed of 117 pillars, and the pillars are separated by grooves. The mold is prone to breakage during the production process. According to statistics, when a newly made back mold core is produced to 100,000 products, an average of 20 to 25 pillars will break, and when the number of broken pillars reaches about 25 pieces , the mold is scrapped. According to the analysis of the fracture, it is found that there is regularity, the fracture is at the same position, and the shape of the crack is also very close. Through the microscopic observation of the mold insert, it is found that the surface of the steel has irregular particles evenly distributed on the part of the steel surface that has been cut by...

AI Technical Summary

Problems solved by technology

[0004] 2. There are two types of hardness in the material, which leads to the inconsistency of the inner and outer steel materials when elastic deformation occurs, resulting in internal stress. During the production process, the mold repeatedly opens and closes, resulting in stress accumulation and the possibility of cracking;

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