US 6,334,973 B1 · Method of producing molded article

Abstract

A molded article having a highly accurate outer form accuracy, including various optical products, is produced from a preform having a simple form by a press-molding, in which a fine pattern can be highly accurately transferred and no burr is formed. A first mold member having a concave portion with an inner surface made of a molding surface and a second mold member which is to be opposed to the first mold member and has a molding surface are used to press-mold the preform. The preform is shaped in a polyhedral form to permit fitting of the preform in the concave portion of the first mold member.

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Facts

Application

09/671,615Filed 28 Sep 2000

Granted

1 Jan 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

C03B 11/082
For making solid articles, e.g. lenses: having profiled, patterned or microstructured surfaces
B29C 43/021
Of articles of definite length, i.e. discrete articles: characterised by the shape of the surface
B29C 43/34
Component parts, details or accessories; Auxiliary operations: feeding the material to the mould or the compression means
B29C 43/38
Moulds for making articles of definite length, i.e. discrete articles: with means to avoid flashes

Method of producing molded article

Life of this patent

Abstract

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Method of producing molded article

Life of this patent

Abstract

Claims0