WO2018076089A1 - Bague d'étanchéité d'enveloppe utilisée dans un procédé de vulcanisation en autoclave pour pneus sans chambre à air - Google Patents

Bague d'étanchéité d'enveloppe utilisée dans un procédé de vulcanisation en autoclave pour pneus sans chambre à air Download PDF

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Publication number
WO2018076089A1
WO2018076089A1 PCT/BR2017/050317 BR2017050317W WO2018076089A1 WO 2018076089 A1 WO2018076089 A1 WO 2018076089A1 BR 2017050317 W BR2017050317 W BR 2017050317W WO 2018076089 A1 WO2018076089 A1 WO 2018076089A1
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WO
WIPO (PCT)
Prior art keywords
tire
envelope
bead
ring
sealing ring
Prior art date
Application number
PCT/BR2017/050317
Other languages
English (en)
Portuguese (pt)
Inventor
Roberto Kazuhiko TAKAHASHI
Original Assignee
Takahashi Roberto Kazuhiko
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takahashi Roberto Kazuhiko filed Critical Takahashi Roberto Kazuhiko
Publication of WO2018076089A1 publication Critical patent/WO2018076089A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/02—Moulding by agglomerating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/54—Retreading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/58—Applying bands of rubber treads, i.e. applying camel backs
    • B29D30/62—Applying bands of rubber treads, i.e. applying camel backs by extrusion or injection of the tread on carcass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/02—Replaceable treads

Definitions

  • the present invention relates to an envelope sealing ring applied in autoclave vulcanization process for truck and light commercial vehicle camcorder tires where, more precisely, said sealing ring has innovative constructive features allowing the Improvement of the 'wrapping' stage of the tire as it aims at sealing the outer side of the tubeless tire bead thus allowing the 'skirt' of the envelope to be shorter resulting in the larger inner diameter of the tire. envelope, making it easier to mount the tire inside the envelope, and greatly improving its service life.
  • the vulcanization of cold vulcanized tires is performed in autoclaves and may have some variations, requiring some pre-preparation operations.
  • the conventional system uses an outer envelope and an inner envelope.
  • an exhaust sleeve (or fabric strip) is then applied which will allow suction of all air that exists between the vulcanizing tire and the outer and inner envelope system.
  • the outer envelope sized to the size of the tire, is mounted in an envelope opener, which opens it and allows the tire to be vulcanized. With the envelope open, the tire to be vulcanized is inserted and the exhaust sleeve (or cloth strip) must be properly positioned and must be properly centered relative to the envelope valve.
  • the inner envelope of a size suitable for the tire to be vulcanized is then mounted on a suitable table. After the assembly is completed, the outer envelope valve is connected to the vacuum system and air is extracted between the vulcanizing tire and the outer and inner envelope system, which operates with a vacuum chamber. The tire thus prepared is ready to be mounted on the vulcanization autoclave.
  • the outer envelope is mounted in the usual manner, without forgetting to place the exhaust sleeve (or fabric strip) in a position centered with the envelope valve.
  • the exhaust sleeve or fabric strip
  • the outer envelope is mounted in the usual manner, not forgetting the placement of the exhaust sleeve (or fabric strip) in a position centered with the envelope valve. Then, a vulcanization bag of a size suitable for the tire to be vulcanized is mounted inside the tire, so that the valve of this bag is diametrically opposed to that of the envelope valve.
  • a mounting device is placed the lower half rim and a rim and on this assembly is placed the tire / envelope / vulcanization bag, being careful to match the valve of the vulcanization bag with its housing in the lower semi-rim .
  • a second rim is placed, and finally the upper half rim, which is fixed to the lower half rim by a mechanical quick clamping system. This set is then ready to be installed in the vulcanization autoclave.
  • lever system (AL) (see figure 1D) designed to increase the rim diameter against the inner wall end of the tire bead to ensure sealing of the envelope in the tire, said lever system being installed on the inner portion of the rim (a).
  • Said lever (b) has a dual spring adjustment system and three manual adjustments via pins or screws to increase the circumferential expansion stroke of the rim.
  • envelope a) Outer envelope of the tire made by the equipment called envelope
  • This lever system has, as a consequence, the determination of the envelope dimension in the radial direction of the tire, also known as 'skirt' to reach the inner edge of the tire bead.
  • the tire vulcanization mold includes bead rings having a bead forming surface.
  • n. MU 8800950-5 relates to a removable ring wheel arrangement for tubeless tires, where the wheel has a 15 ° inclination to seat the tire and is provided with a removable ring, associated with a safety ring and a ring seals mounted on their recesses.
  • JP2016083855 refers to a rigid reinforcing ring and tire vulcanization method using said ring to provide a method for vulcanization in a tire, wherein the degree of freedom and productivity is not deteriorated, increasing its dimensional accuracy.
  • a method of tire vulcanization where a rough tire is set into a mold, and a bladder is inserted into the rough tire causing expansion; thus, pressing is performed outwards in the direction of the tire diameter, performing vulcanization molding.
  • the bladder is expanded in a state in which a rigid ring reinforcement, with a body part and a cone part, is interposed between the inner circumferential face of the region corresponding to the tread portion of the rough tire and the outer circumferential face of the corresponding region. to the floor part of the bladder.
  • the sealing ring now developed is an innovation aimed at solving shortcomings of the ring, popularly known as "arinho", currently used.
  • the first aspect we sought to optimize was the inner diameter of the envelope used in the conventional "arinho".
  • the conventional "pin” ( Figure 1D) utilizes a lever system (b) that expands its diameter against the end of the inner wall of the tire bead. Consequently, the radial direction envelope size (popularly known as the skirt) must reach to the inner edge of the tire bead, otherwise the tire edge will be exposed (see Figure 1F).
  • this too long “skirt” makes the inner circumference of the envelope very small, which makes it difficult to put the tire inside the envelope, and subject the envelope to high stretching tensions, which shortens the life of the envelope due to tears (Figure 1E).
  • the present sealing ring has been studied, developed, designed and dimensioned with the tire contact point in order to seal the envelope, the outer side of the tubeless tire bead ( Figure 8).
  • the envelope covering the tire also has to reach only the outside of the bead.
  • the envelope "skirt" may be shorter with a much larger inner diameter of the envelope. This greatly facilitates the mounting of the tire inside the envelope, and greatly increases its service life.
  • the result of this innovative concept is a sealing ring that sits on the outside of the bead of the tubeless radial truck tire on its tapered face.
  • the sealing ring needs a fulcrum to exert the force necessary to hermetically seal the envelope so that the pressure of the autoclave, as opposed to the vacuum of the envelope, exerts the constrictive force that the tire and new rubber layer adhere to. -molded.
  • the ring is provided with multiple hinged locks distributed equidistantly around the ring, whose movable mechanism, upon closing, rests on the inner flank of the tire bead generating the necessary counterforce to seal the envelope.
  • the hinges are provided with springs that generate the necessary force to seal.
  • the end of the hinge acts as a fulcrum on the inner sidewall of the tire and exerts the spring force against the inner sidewall of the tire.
  • the vulcanization time is the same for both the innovative sealing ring and the innerlope.
  • the difference between the two systems appears in the assembly process and the tightness test.
  • Sealing ring assembly is faster because the ring envelope suction time relative to the innerlope suction time is about two to three times shorter.
  • Envelope suction in the assembly process has the dual function of preparing the assembled tire to be placed into the autoclave and testing the envelope for tightness, ie checking that there are no punctures or leaks that could remove the vacuum from the envelope. If the suction does not hold, the envelope and innerlope must be removed. In the case of the sealing ring in question, the envelope does not have to be disassembled.
  • Figures 1A, 1B and 1C represent, by illustrative perspective, the current state of the art, illustrating the current forms of autoclave vulcanization tire mounting, with Figure IA depicting conventional O-ring mounting; Figure 1B depicts the innerlope and outer envelope assembly and Figure 1C illustrates the inner tube tire assembly from the wheel and outer envelope;
  • Figure 1D illustrates a conventional sealing ring, more specifically the most widely used model on the market today, having a rim (a) and a single lever (b);
  • Figure 1E shows an envelope-mounted tire (E1) with long flaps (L1) and a pair of conventional rims (a) each mounted on one edge of the tire;
  • Figure 1F shows an envelope mounted (E1) tire with exposed tire rim;
  • Figure 2 shows a perspective view of the tubeless tire in relation to the envelope and pair of innovative sealing rings
  • Figure 3 shows a perspective view of the tire illustrating the assembled gasket
  • Figure 4 shows a perspective view of the innovative seal ring illustrating an exploded lock
  • Figure 5 shows an assembled perspective view of the sealing ring
  • Figure 6 illustrates a perspective view and partial section of the ring and lock
  • Figure 7 is a perspective view of a lock and part of the ring as well as the lever blade in an exploded position
  • Figure 8 shows a longitudinal sectional view A of the tire and the sealing ring showing the locks in the unlocked position
  • Figure 9 illustrates a longitudinal sectional view A. of the tire and part of the ring seals illustrating the locks in locked position illustrating the sealing of the envelope on the conical faces of the tire.
  • the present invention relates to the "ENVELOPE SEALING RING APPLIED IN CAMCRED TIRES AUTOCLAVE", more precisely ring (10) of the type used for sealing. of envelope (EP) in tire (P) for vulcanization process.
  • said sealing ring (10) is designed to be installed, in pairs, on the tapered face (tl) of the bead (TL) of the tubeless tire (P);
  • CT compression spring actuated locks
  • Mentioned ring (10) can be manufactured by various processes, namely: i) casting process using nodular steel; ii) flat sheet oxyfuel process using steel sheet above 1045 or higher in hardness, with subsequent hardening by heat treatment; iii) calendering process using 1045 steel profile or higher with subsequent hardening by heat treatment. All these processes are completed by machining the material for dimensional normalization and standardization.
  • said ring (10) has an 'L' cross section composing a flat edge (11) with width (x) (see figures 8 and 9) designed for seating on the outer and conical face (tl) of the bead (1).
  • TL of the tire (P), as well as provides annular wall (12) with rectilinear inner face (12a) designed for mounting the lock assembly (CT) which when actuated exert radial force (FR) to hermetically seal the envelope ( EP) next to the conical face (tl) of the tire bead (TL) (P).
  • the outer diameter (dl) of the sealing ring (10) is determined by the following characteristics: (i) tire rim diameter (P);
  • Said set of locks (CT) can be fixed by welding or screws and are distributed radially throughout the inner perimeter of said orthogonal wall (12) of the ring (10).
  • This symmetrical distribution is variable in its quantity as a function of tire sizing (P) where the larger the diameter (d) of the tire (P) the greater the amount of locks (CT), and the spacing (e) between each lock ( CT) is defined for mounting support hooks (GB) to any autoclave dimension (AU) manufactured on the market for each specific tire segment (P).
  • Each lock is comprised of support (20) and movable mechanism (30) mounted to each other by juxtaposing flaps (21) / (31) through a transverse axis (E1).
  • the bracket (20) provides for a 'U' cross section composing the center wall (22) and side walls (21a) which configure the movable mechanism mounting tabs (21) (30) ).
  • the central wall (22) is also cut out (22a), also U-shaped, but inverted and provided with extreme widening (22b) to compose guides for visual centering (GC) of the ring (10) next to the bead (TL).
  • the reduced width edge (22c) of the cutout (22) configures a travel limiter of the movable mechanism (30) in the locked position (see Figure 4).
  • Said sidewalls (21a) of the support (20) comprise oblique indentations (21b) practiced on the lower edge, as well as chamfers (21c) practiced on the edges. They also have a pair of holes (21d) angularly aligned with each other, and in one of the pairs (21d) is installed the transverse axis (El) designed for mounting the hook (gl) of said tensioning spring (ML). ) of the movable mechanism (30).
  • Said movable mechanism (30) hinges on the shaft (El) of the support (20) and is comprised of a single piece provided with housing (SA) section of the drive lever blade (41) and pressure sector (SP) of the inner edge of the bead.
  • said housing sector (SA) of the blade (41) of the drive lever (40) is formed by cut and U-shaped plate forming the main wall (32) and fixing tabs (31) on the walls. (21a) of the support (20), with one of the tabs (31) provided with a limiting screw (pl) of the movable mechanism (30) when in the unlocked position (see figure 6).
  • Said main wall (32) of the movable mechanism (30) receives a U-section piece (32a) mirrored fixed to the inner faces of the main wall (32) and tabs (31) configuring for mounting the blade (41) of the lever (40) for moving the mechanism (30) when sealing the envelope (EP) close to the conical face (tl) of the bead (TL).
  • the pressure sector (SP) of the bead inner flank (tl) is formed by an appendix (32a) that extends from the edge of said main wall (32) and is of reduced width (y) relative to the total width (yl) of the wall (32) and also where a pair of projecting tabs (34) are provided.
  • Said appendix (32b) is slightly angled (a) and where an oblong tear (32b) is provided for traversing the other hook end (g2) of the tensioning spring (ML) for mounting on another transverse axis (E2) mounted between the tabs (34).
  • Said appendix (32a) when articulated by lever (40) promotes compression of the bead flank (TL) together with the envelope skirt (EP) against the flat edge (11) of the ring (10).
  • the envelope sealing (EP) process has the following steps:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne une bague (10) du type utilisé pour l'étanchéité d'enveloppe (EP) dans un pneu (P) pour un procédé de vulcanisation, ladite bague d'étanchéité (10) étant installée, par rapport aux paires, sur la face conique (FC) d'assise du talon (TL) du pneu sans chambre à air (PN). Le montage de chaque bague d'étanchéité (10) est réalisé au moyen d'un ensemble d'éléments de blocage (CT) actionnés par des ressorts de compression (ML), dont la force est calculé en vue de l'absorption des variations dimensionnelles résultant des procédés de fabrication du pneu ou des dilatations et déformations résultant de leur utilisation en cours de vie utile. Ledit ensemble d'éléments de blocage (CT) peut être fixé par soudure ou au moyen de vis, les éléments étant répartis radialement sur tout le périmètre intérieur de ladite paroi perpendiculaire (12) de la bague (10). Ladite répartition symétrique est variable quantitativement en fonction du dimensionnement du pneu (P) : plus le diamètre (d) du pneu (P) est grand, plus la quantité d'éléments de blocage (CT) est importante, l'espacement (e) entre chaque élément de blocage (CT) étant défini en vue du montage de crochets de support (GB) dans toute dimension d'autoclave (AU) fabriqué sur le marché pour chaque segment spécifique de pneu (P). Chaque élément de blocage (CT) comprend un support (20) et un mécanisme mobile (30) montés entre eux par juxtaposition d'ailettes (21)/(31) par l'intermédiaire d'un axe transversal (E1). Ledit mécanisme mobile (30) s'articule sur l'axe E1) du support (20) et comprend une pièce unique pourvue d'une partie de logement (SA) de la palette (41) du levier d'actionnement (40) et une partie de pression (SP) du flanc interne du talon (TL) pour l'étanchéité de l'enveloppe (EP) au voisinage de la face conique (t1) du pneu (P).
PCT/BR2017/050317 2016-10-25 2017-10-17 Bague d'étanchéité d'enveloppe utilisée dans un procédé de vulcanisation en autoclave pour pneus sans chambre à air WO2018076089A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR102016024956-2 2016-10-25
BR102016024956-2A BR102016024956B1 (pt) 2016-10-25 2016-10-25 anel de vedação de envelope aplicado em processo de vulcanização em autoclave para pneus sem câmara

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WO2018076089A1 true WO2018076089A1 (fr) 2018-05-03

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886028A (en) * 1973-06-14 1975-05-27 Oliver Tire & Rubber Co Apparatus for recapping tires with precured tread rubber
JPS6071210A (ja) * 1983-09-29 1985-04-23 Yokohama Rubber Co Ltd:The タイヤ加硫用プラダ−
BR8404268A (pt) * 1984-02-13 1986-03-11 Oliver Rubber Co Aparelhagem para uso na vulcanizacao de banda de rodagem e processo para a vedacao de um envoltorio de recapeamento
CN201198179Y (zh) * 2008-04-17 2009-02-25 青岛高校软控股份有限公司 用于轮胎翻修预硫化的内包封套
CA2659019A1 (fr) * 2009-03-24 2010-09-24 Shunli Chen Enveloppes de rechapage de pneu a motif
CN201800174U (zh) * 2010-07-29 2011-04-20 桂林橡胶机械厂 轮胎硫化机整体式热板
CN102029671A (zh) * 2009-09-30 2011-04-27 江阴市林盛机械有限公司 密封性能好的液压轮胎定型硫化机中心机构
CN204525881U (zh) * 2015-01-30 2015-08-05 盛建树 长裙包封套及包含该长裙包封套的硫化密封装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886028A (en) * 1973-06-14 1975-05-27 Oliver Tire & Rubber Co Apparatus for recapping tires with precured tread rubber
JPS6071210A (ja) * 1983-09-29 1985-04-23 Yokohama Rubber Co Ltd:The タイヤ加硫用プラダ−
BR8404268A (pt) * 1984-02-13 1986-03-11 Oliver Rubber Co Aparelhagem para uso na vulcanizacao de banda de rodagem e processo para a vedacao de um envoltorio de recapeamento
CN201198179Y (zh) * 2008-04-17 2009-02-25 青岛高校软控股份有限公司 用于轮胎翻修预硫化的内包封套
CA2659019A1 (fr) * 2009-03-24 2010-09-24 Shunli Chen Enveloppes de rechapage de pneu a motif
CN102029671A (zh) * 2009-09-30 2011-04-27 江阴市林盛机械有限公司 密封性能好的液压轮胎定型硫化机中心机构
CN201800174U (zh) * 2010-07-29 2011-04-20 桂林橡胶机械厂 轮胎硫化机整体式热板
CN204525881U (zh) * 2015-01-30 2015-08-05 盛建树 长裙包封套及包含该长裙包封套的硫化密封装置

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BR102016024956B1 (pt) 2021-06-08

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