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Parison production apparatus and parison production method

A technology for manufacturing devices and manufacturing methods, which is applied in the direction of chemical instruments and methods, manufacturing tools, glass manufacturing equipment, etc., can solve the problems of increased manufacturing costs, time-consuming, and reduced use efficiency of parison manufacturing devices, and achieve low cost and restraint. The effect of oxidation

Inactive Publication Date: 2014-09-03
OHARA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve such problems, it is considered to replace the molding die as soon as possible, but since it takes time to replace the molding die, there are problems such as a reduction in the use efficiency of the parison manufacturing equipment and an increase in manufacturing costs.

Method used

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  • Parison production apparatus and parison production method

Examples

Experimental program
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Effect test

Embodiment 1

[0096] The above-mentioned parison manufacturing apparatus (an apparatus that makes the receiving surface of the first mold into a conical shape and rotates in opposite directions in the opening and closing direction downward) was used. In addition, measurement conditions are as follows.

[0097] The distance from the nozzle tip of the downflow device to the first mold is about 10mm

[0098] The temperature of the molten glass flowing down is about 900°C

[0099] The viscosity logη of the flowing molten glass is about 1.2

[0100] The time that the first mold holds the molten glass block is about 2.0 seconds

[0101] The time to open and close the first mold is about 0.3 seconds

[0102] The distance from the first mold to the second mold is about 800mm

Embodiment 2

[0104] The receiving surface of the first mold is conical, and the opening and closing direction is horizontal. Other conditions are identical with embodiment 1.

Embodiment 3

[0106] The receiving surface of the first mold is spherical, and the opening and closing direction is horizontal. Other conditions are identical with embodiment 1.

[0107] In Example 1, the average value of the deviation was 15 mm. In Example 2, the average value of the deviation was 100 mm. In Example 3, the average value of the deviation was 150 mm. Therefore, according to this Example, it became clear that the accuracy with which a molten-glass gob falls from a 1st mold to a 2nd mold can be improved by making the receiving surface of a 1st mold into a conical shape. In addition, it was also found that the accuracy of dropping the molten glass gob from the first mold to the second mold can be remarkably improved by rotating the opening and closing direction downward and in opposite directions.

[0108] (2) A molten glass gob is dropped from the first mold to the second mold, and the capacity of the molten glass gob is measured. The operation time of the parison manufact...

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Abstract

The present invention provides a parison manufacturing device capable of manufacturing parisons at low cost. The parison manufacturing apparatus 1 has a first mold (20) for receiving molten glass, and a second mold (50) for receiving a gob of molten glass moved from the first mold (20). The first mold (20) has a receiving surface (20A) for receiving molten glass, and can be divided into two or more split molds (30, 40) on the receiving surface (20A).

Description

technical field [0001] The present invention relates to a parison manufacturing device and a parison manufacturing method for manufacturing a parison from molten glass, for example, in an optical element manufacturing process. [0002] This application claim is based on the patent application No. 2004-364919 filed in Japan on December 16, 2004, the patent application No. 2005-47275 filed in Japan on February 23, 2005, and the patent application No. 2005-47275 filed in Japan on June 21, 2005. Priority of patent application No. 2005-181100, the content of the above patent application is incorporated in this application by reference. Background technique [0003] In recent years, an optical element such as a lens of a digital camera etc. uses an optical lens formed into a predetermined shape. In order to mass-produce such optical lenses with high precision, for example, the following methods are known. That is, first, a glass block (hereinafter referred to as a parison) havin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B11/00C03B7/01
CPCC03B7/12C03B11/08C03B40/04C03B19/02C03B7/14Y02P40/57
Inventor 福田繁树木立诚坂井亮介石崎太
Owner OHARA