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WO2025177015A1 - Presse pour vulcanisation de pneus de véhicule - Google Patents

Presse pour vulcanisation de pneus de véhicule

Info

Publication number
WO2025177015A1
WO2025177015A1 PCT/IB2024/051573 IB2024051573W WO2025177015A1 WO 2025177015 A1 WO2025177015 A1 WO 2025177015A1 IB 2024051573 W IB2024051573 W IB 2024051573W WO 2025177015 A1 WO2025177015 A1 WO 2025177015A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
lateral
mold
heating system
induction heating
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/IB2024/051573
Other languages
English (en)
Inventor
Massimo Capecchi
Simone VETTORI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cima Impianti Srl
Original Assignee
Cima Impianti Srl
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 Cima Impianti Srl filed Critical Cima Impianti Srl
Priority to PCT/IB2024/051573 priority Critical patent/WO2025177015A1/fr
Publication of WO2025177015A1 publication Critical patent/WO2025177015A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662—Accessories, details or auxiliary operations
    • 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
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0811—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using induction
    • 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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662—Accessories, details or auxiliary operations
    • B29D2030/0666—Heating by using fluids
    • B29D2030/0674—Heating by using non-fluid means, e.g. electrical heating
    • 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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662—Accessories, details or auxiliary operations
    • B29D2030/0675—Controlling the vulcanization processes

Definitions

  • This type of press usually includes a base resting on the ground and a central portion, supported by this base, which defines a vulcanization cavity.
  • the tire that needs to be retreaded is housed in the vulcanization cavity.
  • the press also includes an upper portion, which overlies the central portion.
  • the base, the central portion and the upper portion define a structure with a substantially cylindrical shape, with a vertical axis.
  • the technical aim of the present invention is to improve the state of the art in the field of presses for vulcanizing tires.
  • Another object of the present invention is to create a press for vulcanizing tires characterized by lower energy consumption compared to known type presses.
  • Yet another object of the present invention is to make available a tire vulcanizing press which can offer a faster heating transient.
  • a further object of the present invention is to create a press for vulcanizing tires which does not require the installation of expensive and bulky heating fluid production systems.
  • the central portion of the press also defines an opening for inserting the tire to be vulcanized and for extracting the vulcanized tire.
  • the press also includes an upper portion, which overlies the central portion, associated with an opening and closing mechanism; the opening and closing mechanism is configured to position the upper portion at the opening, so as to close the vulcanization cavity, or away from the opening, so as to open the vulcanization cavity.
  • the press also includes a device for inflating the tire when it is housed inside the vulcanization cavity.
  • the central portion includes a plurality of mold sectors, each radially movable from a central position, in which they define, all together, the vulcanization cavity of the tire, to a peripheral position, in which they allow the insertion of the tire to be vulcanized, and the extraction of the vulcanized tire.
  • the press includes an induction heating system of the vulcanization cavity.
  • the aforementioned induction heating system includes a plurality of heating plates, made of ferromagnetic material, associated with respective magnetic field generator elements, positioned at the periphery of the vulcanization cavity.
  • This solution allows obtaining a faster heating transient of the vulcanization cavity compared to known solutions, together with a more favorable energy expenditure of the entire process.
  • vulcanization refers, in a completely general and non-limiting way, to both the process of producing new tires and the retreading of used tyres.
  • the press 1 includes a base 2, which rests on the ground.
  • the press 1 also includes a central portion 3, supported by the base 2.
  • the arm 8 is actuated by a first linear actuator 10 (for example hydraulic, electric, pneumatic, or other type), visible for example in figure 4; the first linear actuator 10 is articulated, at one end, to the lateral portion 9 of the base 2, and at the other end to the arm 8, in an articulation axis that does not coincide with that with respect to which the arm 8 itself is articulated to the lateral portion 9.
  • a first linear actuator 10 for example hydraulic, electric, pneumatic, or other type
  • the mold sectors 11 are movable, each one, radially, from a central position, in which they define, all together, the vulcanization cavity 4 of the tire 5 (shown in particular in figure 5), to a peripheral position, in which they allow the insertion of the tire 5 to be vulcanized, and extraction of the vulcanized tire 5. More in detail, each of the mold sectors 11 is associated with a respective sectorholder support 12.
  • the sector-holder supports 12 are, in turn, housed inside a sleeve 13 of the central portion 3 of the press 1.
  • the press 1 includes an operating mechanism 14 of the sector-holder supports 12 (with the relative mold sectors 11) from the aforementioned central position to the aforementioned peripheral position, and vice versa.
  • the afore-mentioned operating mechanism 14 can be of any suitable type, without limitations.
  • the press 1 includes an inflation device 15 for the tire 5, when it is housed inside the vulcanization cavity 4.
  • the inflation of the tire 5 is necessary to correctly carry out its vulcanization.
  • the inflation device 15 of the tire 5 can be of any suitable type, without limitations.
  • Each mold sector 11 - observed in section - is substantially shaped like a "C", and it has a circumferential development of a certain angle (which obviously depends on the overall number of mold sectors 11 that the press 1 has).
  • each sector-holder support 12 - also this one observed in section - is substantially C-shaped, so to envelop the respective mold sector 11.
  • the base 2 supports a lower part 16 of the mold (figure 5); the lower part 16 of the mold defines, together with the mold sectors 11 (when they are in their respective central positions), the vulcanization cavity 4 of the tire 5.
  • the lower heating plate 19 has an annular shape and is positioned below the lower part 16 of the mold (in particular, in contact with its lower surface).
  • the lower generator element 22 also has an annular shape.
  • the lower generator element 22 is housed inside a respective lower element-holder plate 25; the lower element-holder plate 25 is also in contact with the lower surface of the lower heating plate 19.
  • the lower insulating layer 26 is also in the form of an annular plate; the lower insulating layer 26 is in contact with the lower surface of the lower element-holder plate 25.
  • the lower insulating layer 26 rests on a lower annular support 27 of the base 2.
  • the lower insulating layer 26 could be placed between the lower heating plate 19 and the lower element-holder plate 25.
  • the induction heating system 18 includes an upper heating plate 20.
  • the upper generator element 23 is positioned above the upper heating plate 20 (in particular, in contact with its upper surface).
  • the upper insulating layer 29 is also in the form of an annular plate; the upper insulating layer 29 is in contact with the upper surface of the upper element-holder plate 28, and with a specific abutment surface of the upper portion 6.
  • the upper insulating layer 29 could be placed between the upper heating plate 20 and the upper element-holder plate 28.
  • Each lateral heating plate 21 is positioned in contact with the external lateral surface of the respective mold sector 11.
  • the induction heating system 18 also includes a plurality of lateral insulating layers 32.
  • each mold sector 11 with the respective lateral heating plate 21, lateral generator element 24, lateral element-holder plate 31 and lateral insulating layer 32, are all fixed, in a package, to the respective sector-holder support 12 (for example using screws).
  • each lateral insulating layer 32 could be placed between the respective lateral heating plate 21 and the respective lateral element-holder plate 31.
  • control means 33 include, for each of the parts that define the vulcanization cavity 4, a respective control unit 37, 38, 39, to which a respective electrical alternating current power supply 40, 41, 42 is operationally connected and slaved: this electrical power supply 40, 41, 42 directly powers, in turn, a respective generator element 22, 23, 24.
  • control means 33 include, for each mold sector 11, a respective lateral temperature sensor 34.
  • control means 33 include, for each mold sector 11, a respective lateral control unit 37, and a respective lateral electrical power supply 40, operationally connected, and slaved, to said lateral control unit 37 (see the diagram of figure 15).
  • Each lateral temperature sensor 34 is also operationally connected, and slaved, to the respective lateral control unit 37.
  • control means 33 comprises a lower temperature sensor 35.
  • the lower temperature sensor 35 is directly in contact with the lower surface of the lower part 16 of the mold (for example, through a special hole made in the lower heating plate 19).
  • the control means 33 comprise a lower control unit 38, and a respective lower electrical power supply 41, operationally connected and slaved to said lower control unit 38 (see the diagram in Figure 15).
  • control means 33 comprise an upper temperature sensor 36.
  • the upper temperature sensor 36 is directly in contact with the upper surface of the upper part 17 of the mold (for example, through a special hole made in the upper heating plate 20).
  • the control means 33 comprise an upper control unit 39, and a respective upper electrical power supply 42, operationally connected and slaved to said upper control unit 39 (see the diagram in Figure 15).
  • the upper electrical supply 42 directly powers the upper generator element 23.
  • each of the control units 37, 38, 39 is configured to implement a specific PID type algorithm (proportional, integral and derivative) which allows - through the electrical supplies 40, 41, 42 which power the respective generator elements 22, 23, 24 - to reach a set temperature in the parts that define the vulcanization cavity 4, and to keep it constant during the operating cycle of the press 1, through the appropriate processing of the signals generated by the temperature sensors 34, 35, 36.
  • PID type algorithm proportional, integral and derivative
  • all the generator elements 22, 23, 24 could be powered by a single electrical power supply, operationally connected to a single control unit.
  • the tire 5 to be vulcanized is inserted and positioned inside the vulcanization cavity 4.
  • the inflation device 15 is activated, so as to position it in correspondence with the tire 5.
  • the upper portion 6 is then brought into the closed position of the vulcanization cavity 4, shown in Figures 1 and 2.
  • the press 1 according to the present invention allows to obtain a non-negligible energy saving compared to existing solutions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Presse (1) pour la vulcanisation de pneus de véhicule, comprenant une base (2), une partie centrale (3), supportée par ladite base (2), qui définit une cavité de vulcanisation (4), dans laquelle le pneu (5) qui doit être vulcanisé est destiné à être logé. La presse (1) comprend également une partie supérieure (6), qui recouvre la partie centrale (3), associée à un mécanisme d'ouverture et de fermeture (7); le mécanisme d'ouverture et de fermeture (7) est configuré pour positionner la partie supérieure (6) au niveau de l'ouverture (3a), de façon à fermer la cavité de vulcanisation (4), ou à l'opposé de l'ouverture (3a), de manière à ouvrir la cavité de vulcanisation (4). La presse (1) comprend également un dispositif de gonflage (15) pour le pneu (5). La partie centrale (3) comprend une pluralité de secteurs de moule (11) mobiles radialement qui définissent, en position fermée, la cavité de vulcanisation (4) du pneu (5). La presse (1) comprend un système de chauffage par induction (18) de la cavité de vulcanisation (4).
PCT/IB2024/051573 2024-02-19 2024-02-19 Presse pour vulcanisation de pneus de véhicule Pending WO2025177015A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2024/051573 WO2025177015A1 (fr) 2024-02-19 2024-02-19 Presse pour vulcanisation de pneus de véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2024/051573 WO2025177015A1 (fr) 2024-02-19 2024-02-19 Presse pour vulcanisation de pneus de véhicule

Publications (1)

Publication Number Publication Date
WO2025177015A1 true WO2025177015A1 (fr) 2025-08-28

Family

ID=90054048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/051573 Pending WO2025177015A1 (fr) 2024-02-19 2024-02-19 Presse pour vulcanisation de pneus de véhicule

Country Status (1)

Country Link
WO (1) WO2025177015A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474517A (en) * 1946-04-17 1949-06-28 John L Daum Apparatus for heating tires
JP2004034652A (ja) * 2002-07-08 2004-02-05 Bridgestone Corp 加硫モールド
US20090308861A1 (en) * 2006-09-21 2009-12-17 Kazuto Okada Heating Unit, Tire Heating Apparatus, and Method for Remodeling Tire Mold
US20120074133A1 (en) * 2009-07-16 2012-03-29 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd) Mold heating device
WO2016108993A1 (fr) * 2014-12-30 2016-07-07 Bridgestone Americas Tire Operations, Llc Système et appareil de chauffage de moules
CN116278094A (zh) * 2023-01-07 2023-06-23 深圳塑能节能装备有限公司 轮胎硫化机热板电磁感应加热线圈板、装备及控制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474517A (en) * 1946-04-17 1949-06-28 John L Daum Apparatus for heating tires
JP2004034652A (ja) * 2002-07-08 2004-02-05 Bridgestone Corp 加硫モールド
US20090308861A1 (en) * 2006-09-21 2009-12-17 Kazuto Okada Heating Unit, Tire Heating Apparatus, and Method for Remodeling Tire Mold
US20120074133A1 (en) * 2009-07-16 2012-03-29 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd) Mold heating device
WO2016108993A1 (fr) * 2014-12-30 2016-07-07 Bridgestone Americas Tire Operations, Llc Système et appareil de chauffage de moules
CN116278094A (zh) * 2023-01-07 2023-06-23 深圳塑能节能装备有限公司 轮胎硫化机热板电磁感应加热线圈板、装备及控制方法

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