Patent ID: 7021914

Claim:
A tire mold comprising a molding face for shaping the outside of a tire and a vent structure, the vent structure including a hole having at least one opening in the molding face, an inserted piece provided in the hole so that the surface of the inserted piece defines a part of a molding face, and a micro-gap of not more than 100 micrometers formed between an exterior surface of the inserted piece and an interior surface of the hole for the purpose of venting wherein said exterior surface of the inserted piece is provided with a non-taper part extending from the inner end towards the outer end of the inserted piece, and a taper part tapered extending from the non-taper part towards the outer end of the inserted piece so as to increase the gap between the exterior surface and said interior surface of the hole, wherein the length of the non-taper part in the depthwise direction of the hole is not more than 1 mm, and in the non-taper part the micro-gap is in a range of from 5 to 10 micrometers, said surface of the inserted piece is in a range of from 50 to 500 sq.mm in area, and said surface is provided with no vent hole, and said inserted piece is divided so that said surface thereof is also divided, and a micro-gap of not more than 100 micrometers is also formed along the parting line of the divided surface.