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Heat-resistant glass thermal forming process

A heat-resistant glass and thermoforming technology, which is applied in glass forming, glass reshaping, glass manufacturing equipment, etc., can solve the problems of difficult processing, high defect rate, high cost, etc., and achieve low defect rate and step-by-step Reasonable and easy to operate

Pending Publication Date: 2022-03-25
TAICANG YAOHUA GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because heat-resistant glass contains high-temperature-resistant borosilicate components, its secondary molding process is relatively difficult, and it is manufactured into various utensils, not only the cost is higher than that of ordinary glass, but also the defective rate is also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A heat-resistant glass thermoforming process, comprising the following steps:

[0028] Step 1: Take a heat-resistant glass plate and place it in the mould, and clamp it up and down; The lower surface of the mold has a flat ring-shaped bead, and the ring-shaped bezel is opposite to the ring-shaped flange; the heat-resistant glass plate is placed overhead on the ring-shaped flange, so that the ring-shaped flange and the ring-shaped flange are close to each other, so that the Pyrex plate clamping;

[0029] Step 2: Heat the heat-resistant glass plate along the inner side of the ring-shaped bead, so that the heat-resistant glass plate forms a ring-shaped softening area along the inner side of the ring-shaped bead; control the temperature of the softening area to 820 ° C, and the heating time is 20 minutes.

[0030] Step 3: Vacuumize the cavity between the lower mold and the heat-resistant glass plate, so that the central area of ​​the heat-resistant glass plate sinks downwa...

Embodiment 2

[0042] A heat-resistant glass thermoforming process, comprising the following steps:

[0043] Step 1: Take a heat-resistant glass plate and place it in the mould, and clamp it up and down; The lower surface of the mold has a flat ring-shaped bead, and the ring-shaped bezel is opposite to the ring-shaped flange; the heat-resistant glass plate is placed overhead on the ring-shaped flange, so that the ring-shaped flange and the ring-shaped flange are close to each other, so that the Pyrex plate clamping;

[0044] Step 2: Heat the heat-resistant glass plate along the inner side of the ring-shaped bead, so that the heat-resistant glass plate forms a ring-shaped softening area along the inner side of the ring-shaped bead; control the temperature of the softening area to 850 ° C, and the heating time is 5 minutes.

[0045] Step 3: Vacuumize the cavity between the lower mold and the heat-resistant glass plate, so that the central area of ​​the heat-resistant glass plate sinks downwar...

Embodiment 3

[0057] A heat-resistant glass thermoforming process, comprising the following steps:

[0058] Step 1: Take a heat-resistant glass plate and place it in the mould, and clamp it up and down; The lower surface of the mold has a flat ring-shaped bead, and the ring-shaped bezel is opposite to the ring-shaped flange; the heat-resistant glass plate is placed overhead on the ring-shaped flange, so that the ring-shaped flange and the ring-shaped flange are close to each other, so that the Pyrex plate clamping;

[0059] Step 2: Heat the heat-resistant glass plate along the inner side of the ring-shaped bead, so that the heat-resistant glass plate forms a ring-shaped softening area along the inner side of the ring-shaped bead; control the temperature of the softening area to 830 ° C, and the heating time is 15 minutes.

[0060]Step 3: Vacuumize the cavity between the lower mold and the heat-resistant glass plate, so that the central area of ​​the heat-resistant glass plate sinks downwar...

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PUM

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Abstract

The invention belongs to the technical field of heat-resistant glass forming, and particularly relates to a heat-resistant glass thermal forming process. Placing a heat-resistant glass plate in the mold, and clamping up and down; the die comprises an upper die body and a lower die body which can be close to each other, a circle of annular flange protruding upwards is arranged on the upper surface of the lower die body, a circle of flat annular pressing edge is arranged on the lower surface of the upper die body, and the annular pressing edge and the annular flange are vertically opposite. The heat-resistant glass plate is placed on the annular flange in an overhead mode, the annular flange and the annular pressing edge are close to each other, and therefore the heat-resistant glass plate is clamped; and then heating and softening the heat-resistant glass plate, vacuumizing and deforming, and cooling and shaping to finally obtain the product. The process is reasonable in step, convenient to operate, economical in cost and high in processing efficiency, the upper mold and the lower mold in different shapes can be used according to product design requirements, so that various high-temperature-resistant glassware can be manufactured in batches, and the manufactured product is accurate in shape and size, not prone to cracking and low in defective rate.

Description

technical field [0001] The invention belongs to the technical field of heat-resistant glass forming, and in particular relates to a heat-resistant glass thermoforming process. Background technique [0002] Heat-resistant glass refers to glass that can withstand hot and cold fusion. It has a low thermal expansion coefficient and is not easy to break under sharp temperature changes. board etc. [0003] Compared with ordinary glass or tempered glass, heat-resistant glass is different in composition and properties. Heat-resistant glass has a high content of borosilicate, which can inhibit the glass from cracking when the temperature changes. Conventional heat-resistant glass can withstand a high temperature of about 450°C and a temperature difference of about 300°C. The specially modified heat-resistant glass can withstand a high temperature of about 1500°C and a temperature of about 1200°C. Rapid cooling and rapid heating test. In addition, when heat-resistant glass is impa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/035C03C3/091
CPCC03B23/0352C03C3/091Y02P40/57
Inventor 邱高忠
Owner TAICANG YAOHUA GLASS