Abstract: A molding element for a mold for vulcanizing a tread of a tire, comprising a base able to mold part of the tread surface of the tread and a bar able to mold a groove in the tread, the bar comprising two lateral faces extending along its length and projecting from the base and an upper face connecting the lateral faces. The molding element comprises a contact edge formed by the base and the bar, intended to come into contact with another molding element to form all or part of the vulcanizing mold, and further comprising at least one recess in the bar, which opens onto one of the lateral faces and onto the contact edge, but does not open onto the upper face of the bar.

Abstract: A tire mold comprising a pair of side plates, a pair of bead rings abutting on the side plates, and a gas venting passage, wherein each of the bead rings has: a cavity surface; an outer side surface; and an outer peripheral surface having two regions, wherein a first and second outer peripheral surface adjoins the cavity surface. A first gap is lying between the first outer peripheral surface and the side plate by the presence of a knurled groove. A second gap is lying between the second outer peripheral surface and the side plate. A third gap is lying between the outer side surface and the side plate by the presence of a plurality of vent grooves. The first to third gaps function as the gas venting passage.

Abstract: The present invention provides a tire at least comprising: a tread portion having a ground contact surface; and a large number of projections formed in at least a portion of the ground contact surface so as to each have a radius of curvature in a predetermined range. The present invention also provides a mold for molding a tire, comprising: a ground contact surface molding surface; and a large number of recessed portions formed in at least a portion of the ground contact surface molding surface so as to each have a radius of curvature in a predetermined range.

Abstract: A molding element for a mold for vulcanizing a tread of a tire, comprising a base able to mold part of the tread surface of the tread and a bar able to mold a groove in the tread, the bar comprising two longitudinal faces extending along its length and projecting from the base and an upper face connecting the longitudinal faces. The molding element comprises a contact edge formed by the base and the bar, intended to come into contact with another molding element to form all or part of the vulcanizing mold, and further comprising at least one recess in the bar, which opens onto the upper face and onto the contact edge, but does not open onto the longitudinal faces of the bar.

Abstract: A tire vulcanization mold can be configured to provide stable ventilation. For example, a tire molding surface has a ventilation groove having a rectangular shape in plan view. A blade has upper end, contact and communication sections. The upper end section thickness is smaller than a groove thickness. The contact section below the upper end section contacts both thickness-direction-facing side faces of the groove. The communication section communicates between a ventilation hole, and a small gap is formed between the groove and the upper end section. Alternatively, the blade has a groove section formed in at least one side face that faces in a blade thickness direction and extends between upper and lower blade ends to form a small gap between the groove and groove section. Air and gas pass through the gap and the communication section and vent to an exterior of the mold through the ventilation hole.

Abstract: A rim 58, 83 of a post cure inflator 60 can be changed in an easy and safety manner, while the amount of energy consumption is reduced. A inflator body 61 having the lower rim 58 can be located at a lower position, and the upper rim 83 can be moved downward to a lower position. Thus, the lower rim 58 and the upper rim 83 can be changed at the lower position in response to the change of the type of the tire to be manufactured, whereby the changing operation is made easy and safety. Further, the upper rim 83 moves upward. With this configuration, a vulcanized tire T having a heavy weight only moves in a front and rear direction while being supported by the inflator 61(lower rim 58), whereby the amount of energy consumption can be reduced easily.

Abstract: A process for forming a vulcanized elastomer composition. An alternating electric field is applied to a first composition comprising vulcanized crosslinked elastomer particles while the composition is compressed to thereby devulcanize the crosslinked elastomer particles and form a second composition comprising devulcanized elastomer particles A crosslinking agent is added to the second composition comprising the devulcanized elastomer particles. The second composition having the crosslinking agent is then vulcanized to form the vulcanized elastomer composition.

Abstract: A non-pneumatic tire includes a plurality of springs. Each spring includes a first end portion, a second end portion, and an arching middle portion. Each spring is interwoven with at least one other spring thereby forming a toroidal structure extending about an entire circumference of the non-pneumatic tire. The toroidal structure is at least partially coated with an elastomer. One end portion of at least one spring is wrapped around a first bead structure adjacent a rim.

Abstract: Disclosed is a machine for rotation of the bead area of a green tire so that the bead areas are parallel and concentric in order to remove potential anomalies that can occur to a green tire bead portion during pre-cure handling, storing or during shaping in the tire press. The tire apparatus orients the beads of the green tire parallel and square to one another and also rotates the bead area of the tire into the proper configuration prior to cure. The bead portions of the tire maintain the parallel position as the tire is loaded into a tire mold. Also disclosed is a tire loader that has a bead support ring and paddles to grip the outer crown portion of the tire.

Abstract: Disclosed is a machine for rotation of the bead area of a green tire so that the bead areas are parallel and concentric in order to remove potential anomalies that can occur to a green tire bead portion during pre-cure handling, storing or during shaping in the tire press. The tire apparatus orients the beads of the green tire parallel and square to one another and also rotates the bead area of the tire into the proper configuration prior to cure. The bead portions of the tire maintain the parallel position as the tire is loaded into a tire mold. Also disclosed is a tire loader that has a bead support ring and paddles to grip the outer crown portion of the tire.

Abstract: A compound plant for processing elastomeric compounds for tyres with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring. In operation, a first elastomeric compound is discharged from the at least one batch mixing device and processed with the at least one multi-shaft continuous mixing device to obtain a second elastomeric compound.

Abstract: The invention relates to a tire made of rubbery material comprising a sidewall on which there is formed at least one pattern that contrasts with this sidewall. The pattern comprises a plurality of strands distributed through the pattern with a density of at least five strands per square millimetre (mm2), each strand having a mean cross section of between 0.003 mm2 and 0.06 mm2. The tire also comprises on the said sidewall at least two ribs that pass through the pattern and between which strands of the pattern are present, the said ribs being distant from one another by at most 10 mm, each rib having a height of at least 0.25 mm and a mean width of at least 0.20 mm, the said pattern following the relief formed by the ribs.

Abstract: A blade for a lining of a mold intended for vulcanizing a tire tread, the blade being produced by selective laser melting. The blade includes an anchoring part configured to anchor the blade in a body of the lining, a molding part configured to mold at least one cut in the tread of the tire. The blade further includes reinforcement, wholly present in the anchoring part of the said blade.

Abstract: Embodiments of the invention are used to provide ways of tire tread molding and retreading with a double tread rubber body having a unitary structure that comprises two treads in order to remove the need for buffing an oxide layer typically associated with tread molding and curing. Embodiments of the double tread molding and retreading methods also remove the need for cementing the cured tread to prevent future oxidation buildup. Once the double tread is cured and cooled, it is cut along the centerline with a double tread separation apparatus to expose a soft non-oxidized inner rubber. The cutting is much less energy intensive when compared to buffing with an expendable wire brush. There is no risk of spots of oxidized rubber being missed as is the case with buffing. There is little or no dust created.

Abstract: The tread surface of a tire according to the present invention is molded with a tire mold having a tread molding surface, and at least a portion of the tread molding surface is formed by projecting spherical projection material having a predetermined sphericity and causing the spherical projection material to collide.

Abstract: A device and method for manufacturing features into the tread of a tire are provided. The device and method provide for manufacturing tread features of various shapes and sizes. The tread features may be recessed, protruding, or flush with respect to the surrounding tread surface. The device and method may be used for both new tire constructions as well as retreading operations.

Abstract: A method for axis correction in a processing machine, in particular a shaftless printing machine, has at least one axis for processing and/or transporting a material, at least one detection device for detecting a processing parameter and at least one controller device for calculating a controller output variable for axis correction of the at least one axis using the detected processing parameter. The method is implemented iteratively, with the result that feedforward control output values for the feedforward control of the axis correction are determined during an (n+1)-th change in rotation speed of the at least one axis using observation of the controller output variable and/or the processing parameter during an n-th change in rotation speed of the at least one axis.

Abstract: Tire vulcanizing/retreading and de-vulcanization system including an autoclave and heating based on an induction system, which will lead to vulcanization or de-vulcanization of a tire.

Abstract: A tire vulcanization mold comprises a mold body having an inner surface for molding a tire outer surface and at least one vent passage for the escape of gas in the mold during vulcanization, the vent passage with an inlet end and an outlet end, the inlet end being opened on the inner surface of the mold body, the outlet end communicating with an exterior of the mold body, wherein the vent passage communicates with the inner surface of the mold body at an angle of not less than 60 degrees, and less than 90 degrees with respect to a normal line perpendicular to the inner surface at the inlet end.

Abstract: A tire vulcanization mold includes an elongated exhaust groove open to a tire molding surface, a plate-like blade inserted in the exhaust groove leaving a small gap between the blade and groove defining surfaces, and an exhaust hole connecting the exhaust groove and mold exterior. The exhaust groove has a length reduced partway in a mold depth direction, and includes upper and shorter lower groove portions positioned on mold surface and back surface sides, respectively, of the mold. The upper groove portion thickness is greater than the blade thickness, and the lower groove portion thickness is less than or equal to the blade thickness. The blade includes a communicating portion connecting the upper and lower groove portions, and abuts against portions of the mold defining a bottom surface of the upper groove portion and edge surfaces of both sides in a thickness direction of the lower groove portion.

Abstract: The invention relates to a method of manufacturing a molding element for a tire mold. The molding element comprises a sintered part and a non-sintered part attached to the sintered part. The sintered part comprises a shell and a core internal to the shell and formed as one piece with the said shell. The core comprises a meshed structure comprising a plurality of cavities. The method of manufacture comprises a step of manufacturing the sintered part of the molding element from a metallic powder deposited on a flat surface of a support plate and fused layer by layer, the sintered part being attached to the support plate by fused metallic powder. The method also comprises a step of machining the support plate to form the non-sintered part of the molding element.

Abstract: A vulcanizing mold manufacturing method, and a tire vulcanizing mold are disclosed. Tubular bodies each formed by oppositely arranging the inner peripheral surfaces of both end portions of a plate-shaped body are each arranged so that the gap between both opposite end portions thereof is narrowed and that the tips of both end portions come in contact with the surface of the plaster mold, by inserting and fitting both opposite end portions into a fitting portion of a plate-shaped metal fitting protruding from the surface of the plaster mold. Molten metal is poured over the surface of the plaster mold to embed the tubular body in a mold while exposing the tips of both opposite end portions at the tire molding surface of the mold. The metal fitting is removed from the mold, so that a mold having a small gap between both opposite end portions is manufactured.

Abstract: A mold pin fixed to a tread mold for a tire tread and forming a stud hole is disclosed. The mold pin is provided at one end of its main shaft portion with an expanded portion having a larger outer diameter. The expanded portion comprises a supporting part formed integrally with the main shaft portion, and an outer-shell part disposed on the outer surface of the supporting part to define the maximum outer diameter of the expanded portion. when a force directed from the main shaft portion toward the expanded portion is applied to the outer-shell part, the outer-shell part is moved so as to reduce the maximum outer diameter.

Abstract: A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.

Abstract: A tire vulcanization forming mold and a tire manufacturing method using the same. In the forming mold, a plurality of segment blocks divided in a circumferential direction are equal in circumferential length and are formed with tread forming patterns of plural kinds on which blades for forming tread patterns on a tire are arranged in different arrays. The segment blocks formed with the tread forming patterns of the plural kinds are arranged randomly in the circumferential direction to constitute the mold of a ring shape covering a whole circumference of the tire.

Abstract: A tire vulcanizer and tire vulcanizing system improving production efficiency by shortening time for loading and unloading of tires are provided. They include: a lower mold supporting part; an upper mold supporting part; a moving device moving the upper mold supporting part horizontally; an elevator device moving the upper mold vertically; a lift device pushing up a vulcanized tire held in the lower mold; and a tire supporting part supported by the upper mold supporting part. The tire supporting part moves between a supporting position and a retreated position. The bottom side of the vulcanized tire is supported by the tire supporting part at a peripheral side closer to the outside than a pushed-up position in the supporting position. The retreated position is positioned at a peripheral side closer to the outside than the vulcanized tire.

Abstract: A thermoset cross-linked elastomer material, such as scrap tire rubber, is devulcanized by subjecting the material to a mechanical mixing process in the presence of 0.5 to 2% by wt. of an organic catalyst having a thiol terminus.

Abstract: What is provided is a tire vulcanizer, in which the stress force during engagement of the teeth can be reduced and teeth damage can be suppressed, allowing down-sizing, light-weighting, and simplifying at the same time. It includes: an upper mold attaching part (21) to which an upper mold is attached; a lower mold attachment part to which a lower mold pressed on the upper mold is attached; a supporting part (5) that supports the upper mold attaching part (21) and the lower mold attaching part; a fixed side rack (6) having first teeth (6a) arranged in a height direction and provided to the supporting part (5); a movable-side rack (7) having second teeth (7a) engaging with the first teeth and provided to the upper mold attaching part (21); and a tilting restriction part (40) restricting tilt of the movable-side rack (7) derived from the height direction.

Abstract: An apparatus for extruding a polymeric material, having an extrusion head which includes a male die, a female die coaxially arranged with respect to the male die, a conveying channel, and at least one portion of which is defined between the male die and the female die. The apparatus further includes a device for adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material.

Abstract: A pneumatic tire is molded by using a vulcanizing mold in which blades 20, each composed of a metal thin plate having an inclined portion 20a in the depth direction and a plurality of through holes 20G with the same sectional form as that of projections to be formed in the sipe in the inclined portion 20a are buried in a groove portion corresponding to the tire block of the vulcanizing mold, thereby forming 3D sipes having unevenness in the radial direction of the block and a plurality of pairs of projections in the inclined portion in the block of the tire. Thereby, when longitudinal force is applied to the tire, adjacent small blocks of the block come into close contact with each other only at the positions of the projections of the 3D sipes, thereby making it possible to ensure the block stiffness of the pneumatic tire 10 without reducing the drainage function.

Abstract: The manufactured pieces are the ones both end surfaces thereof in the tire circumferential direction are cut from the pieces before cutting 1 and the pieces before cutting 1 have the cutting regions whose cross-sectional shapes in the tire width direction are the same at both ends of its circumferential direction. And in the cutting process of cutting the pieces for modifying the lengths in the circumferential direction from each of the pieces before cutting 1, in order that the length in the tire circumferential direction of each piece after cutting and that both of the end surfaces in the circumferential direction of the piece after cutting are included in the cutting regions, the cutting lines of each piece are set at different not less than two positions (a, a? and b, b?) in the tire circumferential direction and the pieces are cut by either one of the set cutting lines.

Abstract: A vulcanizing mold manufacturing method, and a tire vulcanizing mold are disclosed. Tubular bodies each formed by oppositely arranging the inner peripheral surfaces of both end portions of a plate-shaped body are each arranged so that the gap between both opposite end portions thereof is narrowed and that the tips of both end portions come in contact with the surface of the plaster mold, by inserting and fitting both opposite end portions into a fitting portion of a plate-shaped metal fitting protruding from the surface of the plaster mold. Molten metal is poured over the surface of the plaster mold to embed the tubular body in a mold while exposing the tips of both opposite end portions at the tire molding surface of the mold. The metal fitting is removed from the mold, so that a mold having a small gap between both opposite end portions is manufactured.

Abstract: Particular embodiments of the present invention include a contoured tire tread, and a mold and method for forming the contoured tread. In a particular embodiment, a mold is provided for forming a contoured tread, the mold including a first mold member and a second mold member. The first and second mold members are reversibly displaceable from each other from a first, closed position in which the first and second members substantially enclose a mold cavity, to a second open position in which the first and second members are displaced from each other. The first mold member contains a mold cavity adapted to contain a polymeric material and having inner wall members and sipe-forming members. The first mold member having a contoured mold cavity bottom surface, and the second mold member having a contoured molding surface.

Abstract: Provided is a pressure vessel having a weld portion structure of a plate material in which a plate receiving a pressure or a load is attached by welding to a wall surface member such as a shell or a head. In the pressure vessel, a stress concentration on the weld portion structure is alleviated and an increase in welding amount and plate thickness of the wall surface member are suppressed. The pressure vessel includes a weld structure portion in which an end of a bolster plate (22) attached so as to partition an inside of a container body and receiving a pressure or a load is attached by welding to a wall surface member (30) of the container body, the weld structure portion having at least two sections including a weld portion (40), i.e., shape displacement points of the weld portion (40) and a stepped portion (50).

Abstract: A tire vulcanization mold comprises a ring shaped tread mold which comprises a plurality of segments, each segment with a radially inner face and a pair of end faces each of which extends from a circumferential end of the inner face toward radially outwardly of the tire, the segments arranged in a circumferential direction of the tire to have a substantially continuous tread molding face by connecting inner faces one another, each inner face of segments comprising a circumferentially extending rib, a laterally extending rib, and blades for molding sipes, the blades including three dimensional blades which comprises a first blade with a thickness not more than 0.3 mm and a second blade with a thickness of from 0.4 to 0.6 mm arranged in one of the circumferentially end regions.

Abstract: A tire mold comprising a pair of side plates, a pair of bead rings abutting on the side plates and a gas venting passage lying between the side plates and the bead rings, wherein each of the bead rings has: a cavity surface; an outer side surface situated opposite to the cavity surface; and an outer peripheral surface connecting the cavity surface and the outer side surface, the outer peripheral surface has two regions in a direction of a bead ring thickness, a first outer peripheral surface adjoining the cavity surface and a second outer peripheral surface adjoining the outer side surface, a first gap is lying between the first outer peripheral surface and the side plate by the presence of a knurled groove on the first outer peripheral surface, a second gap is lying between the first outer peripheral surface and the side plate by making an outside diameter of the second outer peripheral surface smaller than an outside diameter of the first outer peripheral surface, a third gap is lying between the outer side

Abstract: The present invention relates to an apparatus for providing the upper and lower portions of two-part tire molds with an expansible opening to provide clearance for the insertion of green tires, in particular large green tires of the sort used on industrial or off-road vehicles. The tire mold according to the present invention provides a segmented tire mold wherein a plurality of circumferentially arranged segments which contribute to the shaping of the circumferential tread portion of a tire. The sidewall rings and the tread segments may include internal cavities which house insulating material.

Abstract: A tire mold has a tire molding surface and a rough surface molding portion provided in the tire molding surface. In the rough surface molding portion, a maximum height Rz is not less than 4 ?m, a material ratio Rmr(c) in a case where 20% of the maximum height Rz is set to a cutting level c is not less than 3.5%, and a material ratio Rmr(c) in a case where 30% of the maximum height Rz is set to the cutting level c is not more than 25%.

Abstract: A vulcanizing mould for moulding and vulcanizing a tire, comprising a moulding surface extending circumferentially in the mould, and comprising two end strips of patterns arranged respectively close to two edges of the moulding surface and at least one intermediate strip of patterns positioned between the two end strips of patterns. At least one end strip comprises patterns belonging to a first pattern type and the patterns of the first pattern type have a width which is less than the width of the patterns belonging to the other pattern types of the end strip, and the patterns of the first pattern type are grouped at least in twos on first segments of the mould. The patterns of the end strip not belonging to the first pattern type belong to second segments, each second segment comprising just one pattern of the said end strip.

Abstract: A tire vulcanization mold manufacturing method can manufacture a tire vulcanization mold having an exhaust mechanism capable of ensuring sufficient exhaust with fewer processing steps. When a mold having a surface of a gypsum mold transferred to the mold is to be manufactured by pouring molten metal onto the surface of the gypsum mold and solidifying the molten metal, a tubular body having a slit allowing hollow inside to communicate with the outside is disposed in such a way that the slit is brought into contact with the surface of the gypsum mold. Thereafter, the molten metal is poured onto the surface of the gypsum mold in such a way that the tubular body is buried in the mold while the slit is exposed on a tire molding surface of the mold.

Abstract: Provided is a tire vulcanizer capable of adjusting the height of an upper mold attaching member or a lower mold attaching member while fixing the position of the upper mold attaching member or the lower mold attaching member, with a simple structure. A tire vulcanizer (2) includes: a guide frame (5) that supports an upper mold attaching member (21) and a base frame (26); a fixed rack (6) that is provided to the guide frame (5) along the height direction of a mold (23) and includes a plurality of teeth, the mold (23) including an upper mold (4) placed in the upper mold attaching member (21) and a lower mold (35) placed in the base frame (26); a movable rack (7) that is provided to the upper mold attaching member (21), meshes with the fixed rack (6), and includes a plurality of teeth; and an air cylinder that moves the movable rack (7) in the height direction of the mold (23) with respect to the upper mold attaching member (21) while keeping the height of the upper mold attaching member (21) constant.

Abstract: A solid tire mold includes upper and lower pneumatic tire molds. The pneumatic tire molds have adapter receiving surfaces disposed radially inwardly. The pneumatic tire molds are joined at the pneumatic mold receiving portions. The pneumatic tire molds form tread molding surfaces and at least a portion of the shoulder molding surfaces. The solid tire mold also includes toroidal adapters, each having an annular pneumatic mold receiving surface, an annular solid tire curing surface, and a toroidal flange. The flange extends axially inwardly from the lateral wall toward an inner end. The inner end of the flange can be tapered. A toroidal rim extends laterally from one toroidal adapter to the other. The rim is disposed radially outwardly from the toroidal flanges in the assembled solid tire mold.

Abstract: The invention concerns a lining element intended to be applied to a support block of a segment of a segmented mold for tires, the lining element being intended to form tread patterns on part of a tire tread, characterized in that it comprises an outer shell (30) delimiting an inner volume and a core (34) inside the shell.

Abstract: The invention relates to a tire tread for a passenger vehicle comprising a tread surface designed to come into contact with a ground when this tire is running. The tread comprises at least one internal cavity of elongate overall shape with a total length LC and width WC and a sipe less than 2 mm wide beginning partly or totally on the cavity. The sipe extends the cavity over the whole of the length LC while extending radially outwards in order to emerge on the tread surface. The cavity comprises a bottom and two lateral walls surrounding this bottom and extending in the length LC of the cavity. The bottom comprises a message intended for an observer of the tire and the message is at a distance from at least one lateral wall of the cavity, the distance between the message and the said lateral wall being at least equal to 5% of the width WC of the cavity.

Abstract: A solid tire mold includes upper and lower pneumatic tire molds. The pneumatic tire molds have adapter receiving surfaces disposed radially inwardly. The pneumatic tire molds are joined at the pneumatic mold receiving portions. The pneumatic tire molds form tread molding surfaces and at least a portion of the shoulder molding surfaces. The solid tire mold also includes toroidal adapters, each having an annular pneumatic mold receiving surface, an annular solid tire curing surface, and a toroidal flange. The flange extends axially inwardly from the lateral wall toward an inner end. The inner end of the flange can be tapered. A toroidal rim extends laterally from one toroidal adapter to the other. The rim is disposed radially outwardly from the toroidal flanges in the assembled solid tire mold.

Abstract: The invention relates to a tire curing mold comprising at least one lining element for molding the tread of said tire, said lining element comprising at least one bead for molding a groove in the tread. The curing mold comprises at least one insert forming a portion of the bead, said insert partially or completely delimiting a slot extending into the depth of the bead. The slot is oriented substantially perpendicularly to the bead. The slot is configured in order to mold a flexible wall of reduced thickness made as one piece with at least one wall of the groove molded by the bead.

Abstract: In a method for manufacturing tires for vehicle wheels, a green tire, once formed, is transferred into a vulcanization mold and pressed against the holding walls of a molding cavity. Concurrently with the pressing step, a fluid present between the green tire and the holding walls is evacuated through vent valves. The tire is brought into contact with the closing head of each valve so as to push it toward a closed position of the valve itself. The closing head has a distal portion facing the molding cavity and includes at least one grip element for the tire blend, so that the closure member is pulled toward the open position while the molded and cured tire is moved away from the inner surface of the molding cavity.

Abstract: The invention relates to a method for designing a curing mould for a tyre comprising at least one audible wear indicator, including the following steps (200-210): an initial population is defined, comprising a mould model having at least one characteristic relating to the wear indicator, a modified population is generated, comprising at least one mould model having at least one characteristic relating to the wear indicator produced by modifying at least one characteristic of at least one mould model of the initial population, at least one performance indicator is determined for each mould model in an evaluation population comprising at least one mould model of the modified population, based on at least one characteristic of each mould model of the evaluation population, one or more mould models of the evaluation population are selected on the basis of the performance indicator or indicators.

Abstract: The invention relates to a vulcanizing press comprising two plates capable of adopting a proximal position in which said plates close a mold, so as to give a tire a predetermined shape, and a distal position in which the mold is open; and at least one bore formed in one of said plates called the support plate, the diameter of said bore being defined so as to let the head of a pin pass thereinto. The vulcanizing press further includes a locking/unlocking device comprising a first movable stop that can move between a rest position and an active position, in which said stop is interposed between the head of the pin and the support plate in order to keep said pin in the bore, the shank of said pin being fixed to the mold.

Abstract: A root portion 7a of a sipe blade 7 that protrudes from a surface 12a of a plaster casting mold 12 is coated with a coating layer 10 of an easily collapsible refractory material. A string-shaped exhaust hole forming member 11 of a casting refractory material is attached to the sipe blade 7 so as to be in contact with the coating layer 10. Molten metal M is poured onto the surface 12a of the plaster casting mold 12 in this state so as to cast a mold with the shape of the surface 12a transferred thereon and with the root portion 7a of the sipe blade 7 cast therein. The coating layer 10 is thereafter removed to form a slit around the root portion 7a of the sipe blade 7. The exhaust hole forming member 11 is also removed to form an exhaust hole communicating with the outside of the piece. Therefore, the slit and the exhaust hole communicate with each other. In this way, a mold provided with an exhaust mechanism can be simply produced.