Mold for forming a tire and tire production method
AssigneeBridgestone Corporation
InventorYasuyuki Ishihara
Life of this patent
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Abstract
Provided are a mold for forming a tire (1) including an annular tread molding part (20) which is configured to be opened and closed by moving a plurality of segments (21) in a radial direction, and a tire production method using the same. In the mold for forming the tire (1), each of the segment (21) includes an extrusion member (30) which protrudes from a tread design surface (20c) for forming a tread (2c) of the tire (2) when the tread molding part (20) is opened after vulcanization molding of the tire (1) to press the tread (2c) of the tire (2) after the vulcanization molding.
Claims9
A mold for forming a tire for vulcanization molding of an unvulcanized raw tire into a tire, the mold comprising:
- an annular tread molding part which is divided into a plurality of segments arranged in a circumferential direction and which is configured to be opened and closed by moving each of the segments in a radial direction, wherein
- each of the segments includes an extrusion member which protrudes from a tread design surface for forming a tread of the tire when the tread molding part is opened after vulcanization molding of the tire to press the tread of the tire after the vulcanization molding,
- the mold further comprises:
- an outer ring which is moved along a tapered surface provided in each of the segments in an axial direction of the tread molding part relatively to each of the segments to drive each of the segments toward a radially outer side;
- and
- a cam member which is fixed to the outer ring and abuts a rear end of the extrusion member and when the outer ring is moved in a direction of the axis relatively to each of the segments, drives the extrusion member in a direction to protrude from the tread design surface.
A mold for forming a tire for vulcanization molding of an unvulcanized raw tire into a tire, the mold comprising:
- an annular tread molding part which is divided into a plurality of segments arranged in a circumferential direction and which is configured to be opened and closed by moving each of the segments in a radial direction, wherein
- each of the segments includes an extrusion member which protrudes from a tread design surface for forming a tread of the tire when the tread molding part is opened after vulcanization molding of the tire to press the tread of the tire after the vulcanization molding, and
- the extrusion member is disposed to protrude from a position located one-sidedly on one side of the tread design surface in a direction of an axis of the tread molding part in relation to the center of the tread design surface in the direction of the axis of the tread molding part.
Dependencies are inferred from the claim text.