Thermoforming method, thermoforming mold and thermoforming device for glass product

Patent metadata

Field	Value
Publication number	US-10913676-B2
Application number	US-201816102909-A
Country	US
Kind code	B2
Filing date	Aug 14, 2018
Priority date	Nov 17, 2017
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

The present disclosure relates to a thermoforming method, a thermoforming mold, and a thermoforming device. The method comprises: providing a glass sheet to be processed at a softening point temperature and above; providing a thermoforming mold which comprises a male mold, a female mold arranged above the male mold and matched therewith, and a limiting block for limiting the female mold from deviate from the male mold, wherein the female mold comprises a central body module and a female mold frame surrounding the central body module and matched therewith; a first pressurizing process, wherein the central body module and the male mold are matched to press a central plane portion of the glass sheet; and a second pressurizing process, wherein the female mold frame and the male mold are matched to press a peripheral portion of the glass sheet so that the peripheral portion is bent and molded relative to the central plane portion; wherein the central plane portion is always pressed by the central body module in the second pressurizing process. The method improves the quality of a molded glass product and enhances the manufacturing yield of the glass product.

First claim

What is claimed is:

1. A thermoforming mold for a glass product, comprising:
a male mold;
a female mold matched with the male mold;
a glass sheet sandwiched between the male mold and the female mold;
wherein, the female mold comprises a central body and a female mold frame surrounding the central body and matched therewith, the central body and the female mold frame are clamped with the male mold respectively, the central body and the male mold are clamped to press a central plane portion of the glass sheet, and the female mold frame and the male mold are clamped to press a peripheral portion of the glass sheet;
a limiting block spaced apart from the glass sheet with a cavity penetrating through a mold clamping direction, an end of the female mold frame close to the male mold is accommodated in the cavity and located between the limiting block and the glass sheet, and the limiting block limitedly matched with the female mold frame to limit the female mold frame from deviation.

2. The thermoforming mold according to claim 1 , wherein the central body is a T-shaped structure comprising a horizontal portion and a vertical portion connected to each other; and
the female mold frame comprises a first end and a second end arranged sequentially along the mold clamping direction, the first end includes a first inner wall enclosing a first cavity, the second end includes a second inner wall enclosing a second cavity, an inner diameter of the second cavity is smaller than that of the first cavity, and the first cavity is connected with the second cavity to form an accommodating cavity, and the central body is received in the accommodating cavity, the horizontal portion is limitedly matched with the first inner wall, and the vertical portion is limitedly matched with the second inner wall.

3. The thermoforming mold according to claim 2 , wherein a depth of the first cavity along the mold clamping direction is greater than a thickness of the horizontal portion along the mold clamping direction.

4. The thermoforming mold according to claim 2 , wherein the second end is limitedly matched with an inside wall of the cavity, the second end is located between the limiting block and the glass sheet, the limiting block spaced apart from the glass sheet in a direction perpendicular to the clamping direction.

5. The thermoforming mold according to claim 1 , wherein the central body comprises a first pressing plane, and an entire upper surface of the central plane portion is covered by the first pressing plane.

6. A thermoforming device for a glass product, comprising:
a heating station;
a pressurizing station;
a cooling station; and
the thermoforming mold according to claim 1 ,
wherein, the thermoforming mold carries the glass sheet to sequentially pass through the heating station, the pressurizing station and the cooling station,
the pressurizing station comprises a first driving portion and a second driving portion, the first driving portion is connected with the central body, and the second driving portion is connected with the female mold frame, and
under an action of a driving force of the first driving portion, the central body matched with the male mold, under an action of a driving force of the second driving portion, the female mold frame matched with the male mold.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Su Wei
• Xu Bo
• Liu Xuefeng
• Ye Zaizhang

Classifications

• C03B25/08

  of glass sheets · CPC title

• C03B27/0442

  for bent glass sheets · CPC title

• C03B23/0307 Primary

  Press-bending involving applying local or additional heating, cooling or insulating means · CPC title

• Y02P40/57

  Improving the yield, e-g- reduction of reject rates · CPC title

• C03B23/0302

  between opposing full-face shaping moulds · CPC title