Process for preparing pressed high borosilicate glass product

Abstract

The invention discloses a process for preparing a pressed high borosilicate glass product. The process is characterized by comprising the following steps: S10, performing melting, namely putting glassingredients into a glass melting furnace, and performing heating so as to obtain molten glass; S20, performing pressing molding, namely pressing the molten glass by using a mold so as to obtain a container, wherein the upper end of the container is opened, and the lower end of the container is closed; S30, performing annealing, namely performing annealing treatment on the container; S40, performing cutting, namely performing cold cuttingtocut off the closed part of the container so as to open the lower end of the container; S50, performing flat grinding, namely grinding the cut surface at theopening in the lower end of the container to be flat; S60, performing preheating, namely preheating the container at a preheating temperature lower than 720 DEG C; S70, performing clinkering, namelyperforming hot melting heating on the cut surface of the container, so that micro cracks in the cut surface of the container are made up due to hot meltingso as to form a smooth surface; and S80, performing annealing, namely performing annealing treatment on the container. By adopting the process, the surface of the opening in the lower end of the container has no grinding crack, the micro crackscaused by cutting and polishing can be completely made up, and thus glass cup breakage caused by micro crack expansion can be avoided.

Description

technical field [0001] The invention belongs to a preparation process of pressed high borosilicate glass products. Background technique [0002] When broken wall cooking machines, fruit juice machines, soybean milk machines, blenders, etc. are working, glass products (generally cup-shaped and open at both ends) as their working containers need to withstand high-speed tool rotation vibration, internal high pressure, and continuous high temperature. Strict requirements such as high and low temperature impact, so at present, the glass products on the above-mentioned machines in China generally use high borosilicate glass. High borosilicate glass products have the advantages of low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance, and high chemical stability. [0003] At present, when the above-mentioned high borosilicate glass products are produced, the molten glass is first poured into the forming mold and pressed into the fo...

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Problems solved by technology

[0008] In order to solve the problem of microcracks in the cut surface opening of existing high borosilicate glass products after cold cutting, the invention provides a preparation process of pressed high borosilicate glass products

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