Forming method of polarized light film

Abstract

The invention provides a method for forming a polarizing film and a forming device for the polarizing film. Its purpose is to obtain identification marks by using the molding characteristics in the forming process of the polarizing film, and is also suitable for the production of many varieties and small quantities of the polarizing film. To achieve this purpose, it has: a forming box (4) with an opening above it; a switch valve (6) installed on the suction port (5) leading to the inner space of the forming box (4); a vacuum source (7), Connected to the on-off valve (6); the pressing mechanism (8) is arranged on the opening edge of the forming box (4); the mold (10) has a convex spherical forming surface (11) placed inside the forming box (4) ) to shape the polarizing film (2). In the forming process of the colored polarizing film (2) adsorbed on the forming surface (11) by vacuum suction, and the colored convex-concave polarizing film (3), by making the stretching of the polarizing film 2 different, the A dark identification mark (12) is partially formed on the polarizing film (2).

Description

technical field [0001] The present invention relates to a method of forming a polarizing film used in a polarizing lens. Background technique [0002] Polarizing film is usually colored and shaped into a convex-concave shape, sandwiched between plastic lenses or glass lenses, and used as sunglasses lenses. In the forming process of the colored polarizing film, in order to facilitate the assembly of sunglasses, an identification mark of the polarizing direction (the direction of the polarization axis) is added on the polarizing film. The addition of the identification mark is a marker using a special ink, and it is manually performed on each colored polarizing film, so the work is complicated. [0003] On the other hand, Japanese Patent Application Publication No. 2002-512379 discloses a vacuum forming method for a polarizer. This vacuum forming method is oriented to mass production, not to multi-variety and low-volume production. [0004] Therefore, the object of the pres...

AI Technical Summary

Problems solved by technology

The addition of this identification mark is to use a special ink mark (marker), which is manually performed on each colored polarizing film, so the work is complicated.

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