Rubber article mold and method for manufacturing rubber article mold

Patent metadata

Field	Value
Publication number	US-10486339-B2
Application number	US-201615735343-A
Country	US
Kind code	B2
Filing date	Jun 7, 2016
Priority date	Jun 9, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A rubber article mold capable of discharging air from a molding-surface side to a back-surface side during curing while suppressing the entry of rubber into an air vent hole and a method for producing such a rubber article mold are provided. The rubber article mold includes air discharge means for discharging air from a molding-surface side for molding a rubber article to a back-surface side. The air discharge means is formed as an annular hollow penetrating from a molding surface to a back surface of the rubber article mold. The annular hollow has an inflow area where the air on the molding-surface side flows in, a discharge area for discharging the air having flowed in from the inflow area to the back-surface side, and an intermediate area communicating with the inflow area and the discharge area and smaller or larger in diameter than the inflow area and the discharge area.

First claim

The invention claimed is:

1. A rubber article mold having air discharge means for discharging air from a molding-surface side for molding a rubber article to a back-surface side, the air discharge means comprising:
an outer member with a molding surface and a back surface on an opposite side of the molding surface;
an inner member, wherein an annular hole is formed between the outer member and the inner member and formed so as to penetrate from the molding surface to the back surface, the hole including:
an inflow area for allowing an inflow of air from the molding-surface side,
a discharge area for discharging the air on the back-surface side, and
an intermediate area communicating with the inflow area and the discharge area and smaller or larger in diameter than the inflow area and the discharge area; and

interlinking pieces located in the discharge area of the hole and that contact an inner surface of the outer member and an outer surface of the inner member, wherein:
the interlinking pieces are sintered to the outer member and the inner member, and
the outer member and the inner member are formed by an additive fabrication process.

2. A rubber article mold having air discharge means for discharging air from a molding-surface side for molding a rubber article to a back-surface side, the air discharge means comprising:
an outer member with a molding surface and a back surface on an opposite side of the molding surface;
an inner member, wherein an annular hole is formed between the outer member and the inner member and formed so as to penetrate from the molding surface to the back surface, the hole including:
an inflow area for allowing an inflow of air from the molding-surface side,
a discharge area for discharging the air to the back-surface side, and
an intermediate area communicating with the inflow area and the discharge area,

wherein at least one of the inflow area, the intermediate area, and the discharge area has a bent portion which changes an extension direction of the hole; and
interlinking pieces located in the discharge area of the hole and that contact an inner surface of the outer member and an outer surface of the inner member, wherein:
the interlinking pieces are sintered to the outer member and the inner member, and
the outer member and the inner member are formed by an additive fabrication process.

3. A rubber article mold having air discharge means for discharging air from a molding-surface side for molding a rubber article to a back-surface side, the air discharge means comprising:
an outer member with a molding surface and a back surface on an opposite side of the molding surface;
an inner member, wherein an annular hole is formed between the outer member and the inner member and formed so as to penetrate from the molding surface to the back surface, the hole including:
an inflow area for allowing an inflow of air from the molding-surface side,
a discharge area for discharging the air to the back-surface side, and
an intermediate area communicating with the inflow area and the discharge area; and

interlinking pieces located in the discharge area of the hole and that contact an inner surface of the outer member and an outer surface of the inner member, wherein:
a fall-out prevention portion is provided between the outer member and the inner member to prevent the inner member from falling out of the outer member,
the interlinking pieces are sintered to the outer member and the inner member, and
the outer member and the inner member are formed by an additive fabrication process.

4. The rubber article mold according to claim 1 , wherein the hole further includes an annular conically contracting area between the inflow area and the intermediate area, the annular conically contracting area having a diameter that is reduced from the inflow area to the intermediate area.

5. The rubber article mold according to claim 1 , wherein a clearance dimension hole is larger than 0 mm and smaller than 0.5 mm.

6. A method for manufacturing the rubber article mold as recited in claim 1 by the additive fabrication process, comprising:
casting a laser beam at metal powder and laminating sintered layers,
wherein the interlinking pieces interlinking the inner member and the outer member by coming in contact with the inner member and the outer member are molded simultaneously on a lower layer side in a lamination direction of the sintered layers within the hole continuing from the molding-surface side to the back-surface side.

7. The method for manufacturing a rubber article mold according to claim 6 , wherein the interlinking pieces are each spherical.

8. The method for manufacturing a rubber article mold according to claim 6 , wherein the inner member in the inflow area protrudes above the molding surface.

Assignees

• Bridgestone Corp

Inventors

• Kawaki Ryota

Classifications

• B29C35/02

  Heating or curing, e.g. crosslinking or vulcanizing {during moulding, e.g. in a mould}(cold vulcanisation B29C35/18 {; vulcanising tyres, presses therefor B29D30/0601}) · CPC title

• B29C33/38

  characterised by the material or the manufacturing process (B29C33/44 takes precedence) · CPC title

• B29C33/02

  with incorporated heating or cooling means · CPC title

• B22F5/007

  of moulds · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title