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Press-molding apparatus

A pressure molding and equipment technology, applied in glass molding, glass manufacturing equipment, glass pressing, etc., can solve problems such as increased cost, difficulty in precise temperature control, poor thermal efficiency, etc., to prolong life, reduce cost, and reduce frequency Effect

Inactive Publication Date: 2009-02-18
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a large amount of non-oxidizing gas is required, resulting in increased cost
In addition, since the heat in each step chamber escapes through the gap 53, thermal efficiency is poor and precise temperature control of each step chamber is difficult.

Method used

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Examples

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Embodiment Construction

[0068] figure 1 A vertical sectional view showing an embodiment of the present invention. figure 1 (A) indicates the position of the mold during the mold delivery process, figure 1 (B) shows the position of the mold when the steps are carried out.

[0069] The molding apparatus 1 has a conveying channel 2 arranged in a chamber 10 for maintaining a non-oxidizing atmosphere, for example a nitrogen protective atmosphere, and in the figure a mold 11 is conveyed through the conveying channel from right to left 2. The preparation chamber 21 , the heating chamber 22 , the molding chamber 23 , and the cooling chamber 24 are arranged on a straight line along the conveying passage 2 in this order from the right in the drawing.

[0070] Each chamber has a shutter 31 , 32 or 33 at its border with an adjacent chamber, and a shutter 34 serving as an exit from the chamber 10 is provided behind (left side) the cooling chamber 24 . The shutters 31, 32, 33, and 34 are vertically moved an...

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Abstract

A press-molding apparatus comprises a conveyance passageway and, disposed thereon, a heating chamber for heating a mold containing a raw material, a molding chamber for press-molding the raw material in a non-oxidizing gas atmosphere, and a cooling chamber for cooling the mold after molding and in which the mold is successively conveyed on the conveyance passageway. In the press-molding apparatus, each of the heating chamber, the molding chamber, and the cooling chamber is blocked from the atmosphere during the press molding. The apparatus has a means for blocking the molding chamber and the cooling chamber and has an opening for introducing the non-oxidizing gas into the press-molding apparatus, the opening being formed in at least either of the heating chamber and the molding chamber.

Description

technical field [0001] The present invention relates to a pressure molding apparatus for pressure molding optical elements, such as glass lenses used in optical instruments. Background technique [0002] Hitherto, a molding method has been widely practiced in which glass raw materials that have been heated and softened are pressure-molded to produce optical elements, including glass lenses. That is, for example, glass raw material formed into a spherical shape is put into a mold consisting of an upper mold, a lower mold, and a press mold liner, and the glass raw material is softened by heating to about 500-800° C. in a heating step, and then the glass raw material A lens product is extruded and formed, and the product is cooled and then removed. [0003] With regard to those steps, molding is performed at high temperature in particular. Therefore, if molding is performed in air containing oxygen, oxidation of the mold and mold protection film occurs, resulting in shortened...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B11/00G02B1/00
CPCC03B11/122C03B11/125C03B11/005Y02P40/57C03B11/00G02B1/00
Inventor 大神聪司
Owner ASAHI GLASS CO LTD
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