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Characterization and control method for bonding strength of precision glass mould pressing interface

A technology of interface bonding and control method, which is applied in measuring devices, instruments, and mechanical devices, etc., and can solve problems such as forming errors, affinity fusion and adhesion, and molecular diffusion.

Active Publication Date: 2021-09-17
SHENZHEN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, due to the difference in thermal expansion coefficient between the mold material and the optical glass material, factors such as stress field, temperature field and rheological field will cause forming errors, and the nickel phosphide coating of the mold is in a high temperature and high pressure environment with high viscosity. The phenomenon of molecular diffusion, affinity fusion and adhesion bonding is easy to occur between glasses

Method used

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  • Characterization and control method for bonding strength of precision glass mould pressing interface
  • Characterization and control method for bonding strength of precision glass mould pressing interface
  • Characterization and control method for bonding strength of precision glass mould pressing interface

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Embodiment Construction

[0026] Specific embodiments of the present invention will now be described in conjunction with the corresponding drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided only so that the present invention will be thorough and complete so that those skilled in the art can fully describe the scope of the present invention. Wording used in the detailed description of the embodiments illustrated in the drawings should not limit the invention.

[0027] In the glass precision forming process, the result of adhesion is produced during the separation process between the glass and the mold. This invention provides a new glass molding method by studying the debonding behaviors of the typical glass molding interface. method, using the peak bond strength σ max and debonding power W deb relationship to characterize the debonding behavior.

[0028] The adhesion or ...

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Abstract

The invention relates to a characterization and control method for bonding strength of a precision glass mould pressing interface. Specifically, the method comprises the following steps: heating and soaking a top plane mold (101), a bottom plane mold (102) and a glass sample (103); performing pressing and holding operations; performing debonding operation; and performing a cooling and releasing operation; wherein the debonding operation comprises maintaining a certain forming temperature; enabling the bottom plane mold (102) and the glass sample (103) to move downward at a certain debonding speed until a preset debonding distance is reached; meanwhile, adjusting different forming temperatures, so that the glass sample (103) is in a cohesive state, a bonding interface transition state and an interface fracture state respectively. The optical element obtained through the method is high in forming quality, and the service life of a precious mold is prolonged.

Description

technical field [0001] The invention relates to a method for characterizing and controlling the bonding strength of precision glass molding interface, in particular to a method for peeling off the interface formed by precision peeling by changing the temperature and debonding speed during the precision glass molding process. Background technique [0002] Optical glass molding technology is a precision replication molding technology. Compared with traditional processing techniques such as polishing and grinding, it has the advantages of one-time molding, high efficiency and low cost, and is suitable for mass production. This technology has developed rapidly with the increasing use of high-precision optical glass lenses. [0003] Glass molding technology refers to heating and pressing glass and molds, and molding optical glass into optical parts that meet specific requirements at one time, involving many challenges such as mold materials, glass materials, related equipment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
CPCG01N19/04Y02P40/57
Inventor 李莉华周剑
Owner SHENZHEN TECH UNIV
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