Mold and glass molded body manufacturing method
AssigneeKonica Minolta, Inc.
InventorsShuhei Hayakawa, Kazunari Tada
Life of this patent
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Abstract
Disclosed is a mold used as a bottom mold for manufacturing glass molded bodies by accepting molten glass droplets that are dripped in and by compression molding of the molten glass droplets in conjunction with a top mold. The mold is provided with a base material that has a mold surface for compression molding of molten glass drops, and a coating layer formed on the mold surface. The surface of the coating layer formed on the mold surface has a rough surface region that comprises the center of the mold surface, and a mirror finished region that surrounds the outside of the rough surface region and has a lower arithmetic mean roughness Ra than the rough surface region.
Claims14
A mold which is utilized as an under mold for manufacturing a glass molded body by receiving a dropped molten glass droplet and by press-molding the molten glass droplet in conjunction with an upper mold, the mold comprising:
- a base material having a non-planar molding surface to press-mold the molten glass droplet;
- a cover layer formed on the non-planar molding surface;
- and
- a surface of the cover layer formed on the non-planar molding surface having a roughened surface region in a center portion of the non-planar molding surface, and a mirror finished region in the non-planar molding surface and surrounding an outside of the roughened surface region, the mirror surface having an arithmetic average roughness Ra of not more than that of the roughened surface region.
A method for manufacturing a glass molded body comprising:
- dropping a molten glass droplet on an under mold;
- and press-molding the molten glass droplet dropped on the under mold by use of the under mold and an upper mold opposing to the under mold, the under mold comprising:
- a base material having a non-planar molding surface to press-mold the molten glass droplet;
- a cover layer formed on the non-planar molding surface;
- and
- a surface of the cover layer formed on the non-planar molding surface having a roughened surface region in a center portion of the non-planar molding surface, and a mirror finished region in the non-planar molding surface and surrounding an outside of the roughened surface region, the mirror surface having an arithmetic average roughness Ra of not more than that of the roughened surface region.
Dependencies are inferred from the claim text.