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

A technology of porous molds and processing methods, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of unsynchronized steel, stress accumulation, cracking, etc., and achieve the effect of preventing frequent fractures, good rigidity, and good surface finish

Active Publication Date: 2011-05-04
SHENZHEN CHANGHONG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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;

Method used

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

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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention is described in further detail:

[0017] The processing method for preventing the cracking of the porous mold of the laboratory gene storage plate includes:

[0018] (1) The core of the mold is made of steel, and the groove at the bottom of the mold insert after grinding is formed into a rounded corner;

[0019] (2) Carry out high temperature quenching at 1020 degrees;

[0020] (3) Carry out subzero 150 ° cryogenic tempering;

[0021] (4) After 2 times of 300 ° low temperature tempering;

[0022] (5) Carry out precision machining to the steel, and carry out mold assembly after finish machining;

[0023] (6) After the mold trial is qualified, the mold is again subjected to low-temperature stress-relief tempering within the range of 250° to 275°.

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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, and 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 DEG C; (3) deep cooling and tempering are carried out at -150 DEG C; (4) low temperature tempering is carried out at 300 DEG C twice; (5) precision finishing is carried out on the steel, and as the mould is assembled after the precision finishing is over; and (6) low temperature destressing tempering is performed on the mould within the range of 250-275 DEG C 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C21D1/18
Inventor 谢如文
Owner SHENZHEN CHANGHONG TECH CO LTD
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