Abstract: A tire vulcanizing mold includes an upper and lower pair of side molds having side shaping surfaces. Each of the side molds includes: a side mold main body including plural recesses, each being opened to corresponding one of the side shaping surfaces at spaced intervals; plural pieces, each of which is fitted into the recess; and clearances provided between the side mold main body and each of the pieces. Each of the recesses includes: an outer-side inner wall surface defining an outer side in a tire radial direction; an inner-side inner wall surface defining an inner side; a pair of radial inner wall surfaces that are located between the outer-side inner wall surface and the inner-side inner wall surface and define one side and the other side in the tire circumferential direction; and a curved surface that connects the outer-side inner wall surface and the radial inner wall surface.

Abstract: A tire vulcanization mold 10 of an embodiment includes a side mold 14 having a side molding surface 20 for molding a side wall portion. The side mold 14 includes: a side mold body 24 having a plurality of recesses 30 provided at intervals in a tire circumferential direction; a plurality of side pieces 26 fitted into the recesses 30 and forming an annular side molding surface 20 together with the side mold body 24; and a plurality of vent gaps 28 provided between side surfaces 26A on both sides in the tire circumferential direction of the side pieces 26 and wall surfaces 30A of the recesses 30. An inner end 26E in a tire radial direction of the side piece 26 is positioned inwardly in the tire radial direction from an inner end 20E in the tire radial direction of the side molding surface 20.

Abstract: [Object] To prevent deterioration of dehumidification efficiency by suppressing uneven distribution of hollow fiber membranes in an outer casing. [Solution] A dehumidifying element 1 includes a dehumidification space 7 that are formed between a pair of potting material portions 5 and 6 and that accommodates hollow fiber membranes 3 through which highly humid dehumidification-target air is circulated. The dehumidifying element 1 also includes an air supply hole 35 for supplying purging air having a humidity lower than the dehumidification-target air to the dehumidification space 7 and an air discharge hole 36 for discharging the purging air supplied to the dehumidification space 7. In the dehumidification space 7, a guide member 47 is disposed so as to form a plurality of regions in a cylindrical casing 2 as viewed in the axis-L direction, and the hollow fiber membranes 3 are accommodated in the dehumidification space 7 so as to be distributed into the plurality of regions.

Abstract: A tire vulcanizing mold is disclosed capable of accurately providing a clearance, from which air existing between a green tire and a side mold is released, on a side shaping surface and thereby preventing shaping defect. The tire vulcanizing mold includes an upper and lower pair of side molds having side shaping surfaces. Each of the side molds includes a side mold main body, plural pieces, and a clearance provided between the side mold main body and each of the pieces. The side mold main body includes plural recesses, each of which is opened to the side shaping surface and an outer surface, at spaced intervals. Each of the pieces is fitted into the recess and forms the side shaping surface with the side mold main body. The clearance is opened to the side shaping surface and extends from an inner side to an outer side.

Abstract: A tire vulcanization mold includes a side molding surface, a stencil plate for forming a mark that forms a convex mark on an outer surface of a side section, an attachment concave part provided to be recessed on the side molding surface and a male screw fixing the stencil plate to the attachment concave part. An attachment hole to which the male screw is screwed is provided in the attachment concave part and a tapered countersunk part is provided at an opening of the attachment hole. The stencil plate is provided with a bulge part with a tapered shape receiving a head part of the male screw and fitted to the countersunk part. The bulge part is provided with a protrusion protruding to an outer side with respect to a tapered outer peripheral surface thereof and abutting on a countersunk surface of the countersunk part.

Abstract: A tire vulcanization mold disclosed herein includes sectors 13 divided in a tire circumferential direction and molding a tread portion 1 of a tire, and a pair of upper and lower side plates 11 and 12 molding a sidewall portion 2 of the tire. Mold parting lines 16a and 17a formed by the sectors 13 and a pair of the upper and lower side plates 11 and 12 are located in the tread portion 1. The mold parting lines 16a and 17a are set within a range PR which accounts for up to 7.5% of a width BW of an outermost belt 5a of the tire on each of an outer side and an inner side than belt end positions BP of the outermost belt in a tire width direction.

Abstract: A tire vulcanizer is provided which is capable of arranging a sector at a specified position during closing of a mold and suppressing a vulcanization molding defect. The tire vulcanizer includes: the sector that shapes a tread of a tire; paired upper and lower side plates that shape sidewalls of the tire; a segment to which the sector is fixed and which causes the sector to move in a tire radial direction; and mold parting surfaces defined by the sector and the side plates. Mold inner ends of the mold parting surfaces are arranged on the tread, and the mold parting surfaces extend outward in the tire radial direction from the mold inner ends. The sector includes paired upper and lower flange sections which respectively abut the paired upper and lower side plates in a state where the adjacent sectors in the tire circumferential direction tightly contact each other.

Abstract: Disclosed is the invention having an object to prevent vent spew from being cut and clogged in vent holes of an aluminum mold in vulcanization molding of a tire containing an inorganic compounding agent. The present invention relates to a mold for vulcanizing and molding a tire containing an inorganic compounding agent, in which the mold is made of aluminum, and an embedded vent sleeve is made of stainless or metal containing 15% by mass or more of chromium.

Abstract: A pneumatic tire includes, in a tread portion, a plurality of blocks formed by a plurality of main grooves extending in a tire circumferential direction and a plurality of lateral grooves extending in a tire width direction so as to intersect the main grooves. The lateral grooves each include a reinforcement region in which a plurality of projecting portions are formed at a groove bottom. In the reinforcement region, at least one projecting portion is arranged on any line extending in the tire circumferential direction.

Abstract: A tire vulcanization mold 10 of an embodiment includes an annular side mold 14 having a side molding surface 18 for molding a side wall portion T2. In a side mold body 15 of the side mold 14, an annular recess 20 is provided in the side molding surface 18 and a side ring 22 is fitted into the annular recess. The side ring 22 is mounted in the annular recess 20 such that a vent gap 30 for discharging air is formed between the side ring and the annular recess, on an opening portion side of the annular recess 20, and such that the side ring 22 is centered with respect to the side mold body 15 by a close contact fitting portion 28 in which the side ring and the annular recess are fitted without a gap therebetween, on a bottom portion side of the annular recess 20.

Abstract: A tire vulcanizer is disclosed including a sector arranged with respect to a side plate with a high degree of positioning accuracy. The tire vulcanizer includes: the sector that shapes a tread of a tire; a segment to which the sector is fixed and causes the sector to move in a tire radial direction; a bolt that fixes the sector to the segment; a ring-shaped jacket ring provided on an outer side in the tire radial direction of the segment; paired upper and lower side plates that shape sidewalls of the tire; and mold parting surfaces defined by the sector and the paired upper and lower side plates. Mold inner ends of the mold parting surfaces are arranged on the tread, and the mold parting surfaces extend outward in the tire radial direction from the mold inner ends.

Abstract: A tire vulcanizing mold includes a groove-shaped saw cut and a vent hole which are formed in a forming surface for forming a tire surface, the vent hole being opened in the forming surface so as to communicate with the saw cut, and a vent plug being fitted in the vent hole. The vent plug includes a circular-cylindrical housing interiorly including an air discharging path, a stem being inserted in the housing, and a valve body for opening and closing the air discharging path in an end portion closer to the forming surface. The housing has a top surface positioned closer to the forming surface such that the top surface is positioned closer to the forming surface than a groove bottom of the saw cut. The top surface is provided with a cutout by which the air discharging path and the saw cut are communicated with each other.

Abstract: A tire vulcanization mold includes a side molding surface, a stencil plate for forming a mark that forms a convex mark on an outer surface of a side section, an attachment concave part provided to be recessed on the side molding surface and a male screw fixing the stencil plate to the attachment concave part. An attachment hole to which the male screw is screwed is provided in the attachment concave part and a tapered countersunk part is provided at an opening of the attachment hole. The stencil plate is provided with a bulge part with a tapered shape receiving a head part of the male screw and fitted to the countersunk part. The bulge part is provided with a protrusion protruding to an outer side with respect to a tapered outer peripheral surface thereof and abutting on a countersunk surface of the countersunk part.

Abstract: The tire vulcanization mold includes a molding surface for molding a tire surface of a pneumatic tire set in a cavity, a concave portion provided on the molding surface, and a vent plug provided in the concave portion. The vent plug includes a housing having a cylindrical shape and including an exhaust passage, a stem that is inserted in the housing and configured to open and close the exhaust passage of the housing, and an urging member urging the stem toward the cavity side. The concave portion has a narrow portion having a width substantially equal to the outer diameter of the housing of the vent plug, and the vent plug is disposed in the narrow portion.

Abstract: A tire vulcanization mold 10 of an embodiment includes an annular side mold 14 having a side molding surface 18 for molding a side wall portion T2. In a side mold body 15 of the side mold 14, an annular recess 20 is provided in the side molding surface 18 and a side ring 22 is fitted into the annular recess. The side ring 22 is mounted in the annular recess 20 such that a vent gap 30 for discharging air is formed between the side ring and the annular recess, on an opening portion side of the annular recess 20, and such that the side ring 22 is centered with respect to the side mold body 15 by a close contact fitting portion 28 in which the side ring and the annular recess are fitted without a gap therebetween, on a bottom portion side of the annular recess 20.

Abstract: A tire vulcanizing mold is disclosed capable of accurately providing a clearance, from which air existing between a green tire and a side mold is released, on a side shaping surface and thereby preventing shaping defect. The tire vulcanizing mold includes an upper and lower pair of side molds having side shaping surfaces, each of which shapes a sidewall of a tire. Each of the side molds includes a side mold main body, plural pieces, and a clearance provided between the side mold main body and each of the pieces. The side mold main body includes plural recesses, each of which is closed in a tire circumferential direction and a tire radial direction and is opened to a side shaping surface, at spaced intervals in the tire circumferential direction. Each of the pieces is fitted into the recess and forms the side shaping surface with the side mold main body.

Abstract: A tire vulcanization mold 10 of an embodiment includes a side mold 14 having a side molding surface 20 for molding a side wall portion. The side mold 14 includes: a side mold body 24 having recesses 30 provided in the side molding surface 20; a side piece 26 fitted into the recess 30 to form a vent gap 28 with a wall surface of the recess; and a replacement piece 44 for displaying information closely fitted into a mounting hole 42 provided in the side molding surface 20 without a gap therebetween. The replacement piece 44 is provided in the side piece 26 or in the side mold body 24 so as not to span the side piece 26 and the side mold body 24.

Abstract: A tire vulcanization mold 10 of an embodiment includes a side mold 14 having a side molding surface 20 for molding a side wall portion. The side mold 14 includes: a side mold body 24 having a plurality of recesses 30 provided at intervals in a tire circumferential direction; a plurality of side pieces 26 fitted into the recesses 30 and forming an annular side molding surface 20 together with the side mold body 24; and a plurality of vent gaps 28 provided between side surfaces 26A on both sides in the tire circumferential direction of the side pieces 26 and wall surfaces 30A of the recesses 30. An inner end 26E in a tire radial direction of the side piece 26 is positioned inwardly in the tire radial direction from an inner end 20E in the tire radial direction of the side molding surface 20.

Abstract: A tire vulcanizing mold includes an upper and lower pair of side molds having side shaping surfaces. Each of the side molds includes: a side mold main body including plural recesses, each being opened to corresponding one of the side shaping surfaces at spaced intervals; plural pieces, each of which is fitted into the recess; and clearances provided between the side mold main body and each of the pieces. Each of the recesses includes: an outer-side inner wall surface defining an outer side in a tire radial direction; an inner-side inner wall surface defining an inner side; a pair of radial inner wall surfaces that are located between the outer-side inner wall surface and the inner-side inner wall surface and define one side and the other side in the tire circumferential direction; and a curved surface that connects the outer-side inner wall surface and the radial inner wall surface.

Abstract: A tire vulcanization mold disclosed herein includes sectors 13 divided in a tire circumferential direction and molding a tread portion 1 of a tire, and a pair of upper and lower side plates 11 and 12 molding a sidewall portion 2 of the tire. Mold parting lines 16a and 17a formed by the sectors 13 and a pair of the upper and lower side plates 11 and 12 are located in the tread portion 1. The mold parting lines 16a and 17a are set within a range PR which accounts for up to 7.5% of a width BW of an outermost belt 5a of the tire on each of an outer side and an inner side than belt end positions BP of the outermost belt in a tire width direction.