Rubber article mold and method for manufacturing rubber article mold

Patent metadata

Field	Value
Publication number	US-2018169902-A1
Application number	US-201615735343-A
Country	US
Kind code	A1
Filing date	Jun 7, 2016
Priority date	Jun 9, 2015
Publication date	Jun 21, 2018
Grant date	—

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

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 annular hollow so formed as to penetrate from a molding surface to a back surface of the rubber article mold, the annular hollow including: an inflow area for allowing the inflow of air from the molding-surface side, a discharge area for discharging 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.

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 annular hollow penetrating from a molding surface to a back surface of the rubber article mold,
the annular hollow including:
an inflow area for allowing the inflow of air from the molding-surface side,
a discharge area for discharging 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 annular hollow.

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 annular hollow penetrating from a molding surface to a back surface of the rubber article mold, the annular hollow including: an inflow area for allowing the inflow of air from the molding-surface side, a discharge area for discharging air to the back-surface side, and an intermediate area communicating with the inflow area and the discharge area, wherein a fall-out prevention portion is provided between an outer member and an inner member of the annular hollow to prevent the inner member from falling out of the outer member.

4 . The rubber article mold according to claim 1 , wherein the annular hollow has an annular conically contracting area at an end of the inflow-area side of the intermediate area whose diameter reduces to a diameter of the intermediate area such that an end surface on the molding-surface side of the inflow-area becomes flush with the molding surface when the conically contracting area disappears.

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

6 . The rubber article mold according to claim 1 , wherein an outer member and an inner member of the annular hollow are formed by an additive fabrication process.

7 . A method for manufacturing a rubber article mold as recited in claim 1 by an additive fabrication process, comprising:
casting a laser beam at metal powder and laminating sintered layers,
wherein interlinking pieces interlinking the inner member and the outer member forming the annular hollow 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 clearance of the annular hollow continuing from the molding-surface side to the back-surface side.

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

9 . The method for manufacturing a rubber article mold according to claim 7 , wherein the inner member in the inflow area of the hollow 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

• B29C33/02

  with incorporated heating or cooling means · CPC title

• B29C33/38

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

• B29C33/3842

  Manufacturing moulds, e.g. shaping the mould surface by machining · CPC title

• B29C2033/385

  by laminating a plurality of layers · CPC title