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Mold press forming die and molded article manufacturing method

A technology of press forming and pressure forming, which is applied in the direction of manufacturing tools, glass forming, glass pressing, etc., and can solve problems such as stamping action obstruction

Active Publication Date: 2009-09-09
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a risk that friction or jamming will occur on the sliding parts of the cylindrical mold and the upper and lower molds during mold clamping during press forming, and proper pressing operations may be hindered.

Method used

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  • Mold press forming die and molded article manufacturing method
  • Mold press forming die and molded article manufacturing method
  • Mold press forming die and molded article manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0159] Next, the present invention will be described in further detail with reference to specific examples.

[0160] Will figure 1 The compression molding die shown is mounted on Figure 8 In the press molding apparatus shown, a biconvex lens having an outer diameter of 15 mm was molded using a preform of barium borosilicate glass (transition point 514° C., deformation point 545° C.) as a molding material G.

[0161] First, a glass blank thermoformed into a biconvex shape is preheated to 490° C., and supplied to the forming surface of a lower mold held by a lower master mold preheated to about 470° C. in a forming chamber. The lower die and the lower die were raised by raising the drive shaft immediately, and the lower die was inserted into the cylindrical die held by the upper die that had been preheated to about 470°C.

[0162] At this time, while the lower mold is guided by the guide part of the cylindrical mold, the lower mold is moved in the horizontal direction by a p...

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Abstract

The present invention discloses a molded article that is highly accurately press-formed by extremely facilitating horizontal shift of a forming die on a die holding member and highly accurately maintaining an upper die and a lower die coaxial. The mold press forming die is provided with a pair of upper and lower dies (10, 20) having forming surfaces (11, 21) in discretionary shapes; a body die (30) wherein the upper and lower dies (10, 20) are coaxially inserted with their forming surfaces (11, 21) facing each other; a lower die holding member (25) for holding the lower die (20) by permitting the lower die to move in the horizontal direction; and a plurality of rolling members (60) which are arranged between the lower die (20) and the lower die holding member (25) and roll with shift of the lower die (20) in the horizontal direction.

Description

technical field [0001] The present invention relates to a method for press molding that is provided with a pair of molds having molding surfaces of arbitrary shapes, and a cylindrical mold in which the molding surfaces of these molds are opposed to each other and inserted coaxially. Press-molding molds for molding blanks such as glass, especially those that can prevent mold eccentricity (shift [shift] and tilt angle [tilt]) at the time of mold clamping, and pressure-molding optical elements, etc., that require high shape accuracy A compression molding die, and a method of manufacturing a molded body utilizing such a compression molding die. Background technique [0002] As a method of manufacturing optical elements such as aspheric lenses using glass blanks, it is known that the softened glass after heating is softened by a pair of molds having molding surfaces corresponding to the shape of the desired molded body and facing each other. The molded blanks in the state are pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B11/16G02B3/00
CPCC03B11/005C03B2215/72C03B2215/60C03B2215/66C03B11/08C03B2215/67C03B2215/80Y02P40/57C03B11/16G02B3/00
Inventor 佐藤浩一邹学禄
Owner HOYA CORP
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