Abstract: A method is for producing a profile segment of a segmented casting-vulcanizing mold for vehicle tires, the molding area of which molds a segment of the tread profile of a tire to be vulcanized, including the steps: creating a rigid model segment having a casing-like tread surface; milling the profile positive of the tread into the casing-like tread surface of the model segment to obtain the master model; creating a flexible impression from the master model; creating a rigid plaster cast from the impression to form a casting core segment; casting all of the annular, placed-together casting core segments with an aluminium-magnesium alloy to obtain a vulcanizing mold, subsequently divided into profile segments. A plasma coating is applied to the tread of the model segment, into which the profile positive of the tread is subsequently milled to obtain the master model. Plasma coating gives the master model a defined roughness.

Abstract: Venting unit for a vulcanizing mold of a pneumatic vehicle tire, having a central longitudinal mid-axis (a), a cylindrical housing, and a valve insert, which is positioned in the housing and is movable relative thereto and has a valve shank with a valve disk and has a helical compression spring, which surrounds the valve shank and is supported with its one end on the housing and with its other end on the valve disk, it being possible for the housing to be anchored in a venting bore of the vulcanizing mold by a press fit. The housing can be anchored in the venting bore by a press fit just over 30% to 45% of the housing length and at least directly at the outer end of the venting bore.

Abstract: A ventilation unit for a vulcanization mold of a vehicle pneumatic tire has a cylindrical housing that can be pressed into a ventilation hole of the mold, and a valve insert that can be positioned in the housing and has a valve shaft which has a base section which, at the one end thereof, has an end section guided through an opening in the housing base and held by the housing, at the other end thereof carries a valve disc and is also surrounded by a helical compression spring, wherein the end section of the valve shaft that is held by the housing is divided in two by a slot and has end section parts formed as projections, wherein each projection has at the widest point thereof has a collar and inclined surfaces tapering from the collar, and wherein inclined surfaces are provided in the opening section of the opening.

Abstract: Venting unit for a vulcanizing mold of a pneumatic vehicle tire, having a cylindrical housing, which can be pressed into a venting bore of the vulcanizing mold, and a valve insert, which is positioned in the housing and is movable relative thereto and has a valve shank with a valve disk and has a helical compression spring, which surrounds the valve shank and is supported with its one end on the housing and with its other end on the valve disk, the valve shank having a base portion with an outer diameter (d6) which is greater than the inner diameter of the helical compression spring. The valve disk is adjoined by a cylindrical holding portion, onto which the helical compression spring can be firmly fitted, the holding portion having a greater diameter than the base portion, the helical compression spring having at least two closely spaced turns at least at its end that can be fitted onto the holding portion.

Abstract: A vulcanizing mold for winter and all-season vehicle tires includes a mold body and an inner side mold surface having a negative tread profile having negative profile elements for molding a positive tread profile having positive profile elements of the vehicle tire to be vulcanized. Lamellar plates are arranged in the negative profile elements and configured to generate sipes in the positive profile elements. The negative profile elements include a shoulder negative profile element and at least one venting slot arranged within the shoulder negative profile element. The venting slot runs parallel and in spaced relationship to one of the lamellar plates arranged in the shoulder negative profile element. At least one cylindrical vent is arranged only axially outwards with reference to the venting slot.

Abstract: A method is for producing a profile segment of a segmented casting-vulcanizing mold for vehicle tires, the molding area of which molds a segment of the tread profile of a tire to be vulcanized, including the steps: creating a rigid model segment having a casing-like tread surface; milling the profile positive of the tread into the casing-like tread surface of the model segment to obtain the master model; creating a flexible impression from the master model; creating a rigid plaster cast from the impression to form a casting core segment; casting all of the annular, placed-together casting core segments with an aluminium-magnesium alloy to obtain a vulcanizing mold, subsequently divided into profile segments. A plasma coating is applied to the tread of the model segment, into which the profile positive of the tread is subsequently milled to obtain the master model. Plasma coating gives the master model a defined roughness.

Abstract: A vulcanizing mold for winter and all-season vehicle tires includes a mold body and an inner side mold surface having a negative tread profile having negative profile elements for molding a positive tread profile having positive profile elements of the vehicle tire to be vulcanized. Lamellar plates are arranged in the negative profile elements and configured to generate sipes in the positive profile elements. The negative profile elements include a shoulder negative profile element and at least one venting slot arranged within the shoulder negative profile element. The venting slot runs parallel and in spaced relationship to one of the lamellar plates arranged in the shoulder negative profile element. At least one cylindrical vent is arranged only axially outwards with reference to the venting slot.