WO2012176588A1 - 剛性中子 - Google Patents
剛性中子 Download PDFInfo
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- WO2012176588A1 WO2012176588A1 PCT/JP2012/063743 JP2012063743W WO2012176588A1 WO 2012176588 A1 WO2012176588 A1 WO 2012176588A1 JP 2012063743 W JP2012063743 W JP 2012063743W WO 2012176588 A1 WO2012176588 A1 WO 2012176588A1
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- Prior art keywords
- core
- chamber
- segment
- axial direction
- rigid
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- 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
- B29C33/76—Cores
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- 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
- B29D30/0661—Rigid cores therefor, e.g. annular or substantially toroidal cores
Definitions
- the present invention relates to a rigid core that heats a green tire inside by a thermal fluid.
- FIG. 11B a so-called core-type vulcanization method using a rigid core a having a hollow toroid-shaped core body a1 has been proposed (for example, see Patent Document 1). .
- the core body a1 is provided with an outer shape corresponding to the tire inner surface shape in order to improve the formation accuracy of the pneumatic tire.
- tire constituent members such as an inner liner, a carcass ply, a belt ply, a sidewall rubber, and a tread rubber are sequentially pasted on the core body a1 to obtain a raw tire.
- the green tire T is put together with the rigid core a into a vulcanization mold b disposed outside the rigid core and vulcanized.
- the core body a1 has a plurality of cores divided in the tire circumferential direction so that the rigid core a can be disassembled and removed from the vulcanized tire after vulcanization molding. It is formed from the segment c.
- the core segment c includes a first core segment c1 in which split surfaces at both ends in the circumferential direction are inclined in a direction in which the circumferential width decreases toward the inside in the radial direction, and the first core segment c.
- the segments c1 are composed of second core segments c2 that are alternately arranged in the circumferential direction, and whose dividing surfaces at both ends in the circumferential direction are inclined in the direction of increasing the circumferential width inward in the radial direction. Then, the core body a1 is sequentially moved one by one radially inward from the second core segment c2 to be disassembled and taken out from the bead hole of the vulcanized tire.
- the core vulcanization method in order to efficiently perform the heat vulcanization, not only the outer heating for heating the tire from the outer surface side but also the inner heating for heating the tire from the inner surface side is necessary.
- this inner heating as in the conventional bladder type vulcanization method, it has been proposed to fill a heating fluid such as steam or hot air into the inner cavity of the core body a1.
- the core body a1 is divided into a plurality of core segments c in the circumferential direction as described above. For this reason, when the heating fluid is filled in the inner cavity portion of the core body a1, there is a risk that the heating fluid leaks from the abutting portion between the core segments c and c.
- the present inventor has proposed that a gap for absorbing thermal expansion (for example, about 0.13 mm) is formed in advance between the core segments c and c in order to reduce this stress.
- a gap for absorbing thermal expansion for example, about 0.13 mm
- the present invention provides an airtight chamber chamber filled with a thermal fluid inside each core segment, and opens a connection port connected to the chamber chamber on the side surface on one side in the axial direction of the core segment. Based on. Thereby, leakage of the thermal fluid is surely prevented, and a gap for thermal expansion can be formed between the core segments. Further, it is not necessary to connect the thermal fluid to each chamber chamber, and the rigid core can be easily mounted in the vulcanization mold.
- the invention of claim 1 of the present application includes an annular core body having a tire molding surface on an outer surface and on which a raw tire is formed, and the raw tire A rigid core that heats and vulcanizes the raw tire in cooperation with the vulcanization mold by being put into the vulcanization mold,
- the core body which is composed of a plurality of core segments divided in the tire circumferential direction, and can be disassembled by moving the core segments radially inward; A cylindrical core that is inserted into the center hole of the core body and prevents the core segments from moving inward in the radial direction; And a pair of side walls having side plates that prevent the core segments from moving in the axial direction by being disposed on both axial sides of the core body, Moreover, a first dovetail portion comprising one of a dovetail groove or an ant tenon extending in the axial direction is provided on the radially outer peripheral surface of the core, and a radially inner peripheral surface of each core segment has a
- an airtight chamber chamber filled with a thermal fluid is formed inside each core segment,
- the core segment can be connected to a side surface on one side in the axial direction of the core segment with a supply port and an exhaust port of a thermal fluid which is connected to the chamber chamber and provided in the vulcanization mold by being inserted into the vulcanization mold.
- the connection port of the core side connector having the connection port is opened.
- each of the core segments includes an outer segment portion on the radially outer side having the tire molding surface and an inner segment portion adjacent to the inner side in the radial direction.
- a connection port is opened on the side surface on one side in the axial direction.
- the outer segment portion is made of aluminum or an aluminum alloy
- the inner segment portion is made of a stainless alloy
- the core segments adjacent in the circumferential direction have no gap between the circumferential end faces of the inner segment part, and between the circumferential end faces of the outer segment part, It is characterized by having a gap G.
- the invention of claim 4 is characterized in that the gap G between the circumferential end faces of the outer segment portion is 0.08 to 0.18 mm.
- the chamber chamber includes a partition plate that divides the chamber chamber into a first chamber chamber portion that communicates with the supply port and a second chamber chamber portion that communicates with the exhaust port.
- the partition plate is characterized in that a gap is formed between the first chamber chamber and the second chamber chamber between the inner wall surface of the chamber chamber.
- the invention of claim 6 is characterized in that the core main body is taken out of the vulcanization mold and then the chamber chamber is filled with a thermal fluid for cooling.
- an airtight chamber chamber filled with a thermal fluid is formed inside each core segment. Therefore, even when a gap allowing for thermal expansion is formed between the core segments, the leakage of the thermal fluid can be reliably prevented.
- the core-side connector having a connection port that can be connected to the supply port and the exhaust port for the thermal fluid provided in the vulcanization mold on the side surface on one side in the axial direction of the core segment.
- the connection port is opened.
- the connection direction between the connection port and the supply port and the exhaust port of the vulcanization mold is respectively an axial direction.
- connection port of each core segment is connected to the vulcanization mold by relative movement in the axial direction between the vulcanization mold and the rigid core at the time of charging without requiring any special thermal fluid connection work. It can be connected to the supply port and the exhaust port all at once. Therefore, the rigid core can be easily mounted in the vulcanization mold.
- a first dovetail portion extending in the axial direction is formed on the outer peripheral surface of the core, and a second dovetail portion extending in the axial direction is formed on the inner peripheral surface of each core segment. Is formed. Therefore, the engagement of the first and second dovetail joints prevents the core segment from being displaced, and the assembly accuracy of the rigid core is increased. As a result, there is no positional deviation between the connection port, the supply port, and the exhaust port, and the connection can be made more easily.
- the rigid core 1 of the present embodiment includes an annular core body 3 having a tire molding surface S on the outer surface.
- the tire molding surface S includes a tread molding surface portion Sa that forms a tread inner surface of the green tire T, and a side molding surface portion Sb that forms a sidewall inner surface and a bead inner surface of the green tire T.
- the tire molding surface S substantially matches the inner shape of the finished tire (vulcanized tire).
- the rigid core 1 includes a pair of core bodies 3, a cylindrical core 5 inserted in the center hole 3 ⁇ / b> H of the core body 3, and a pair of core bodies 3 arranged on both sides in the axial direction.
- the core body 3 has a tapered surface 7 that is continuous with the inside of the tire forming surface S in the radial direction and is inclined radially inward and outward in the axial direction, and bulges outward in the axial direction. 3B is comprised.
- the core body 3 can be disassembled and includes a plurality of core segments 9 divided in the tire circumferential direction as shown in FIGS.
- the core segment 9 includes a first core segment 9A in which the dividing surfaces 9S at both ends in the circumferential direction are inclined in a direction in which the circumferential width decreases inward in the radial direction, and the first core segment 9A.
- the core segment 9 can move the second core segment 9B radially inward, and after this movement, the first core segment 9A can also be sequentially moved radially inward.
- the core body 3 is sequentially moved radially inward from the second core segment 9B one by one in the same manner as in the prior art, disassembled, and sequentially taken out from the bead holes of the tire.
- each of the core segments 9 includes a radially outer outer segment portion 18 having the tire molding surface S and an inner segment portion 19 adjacent to the radially inner side. It consists of.
- the inner and outer segment portions 18 and 19 are integrally connected by a bolt 35 inserted from the radially inner surface side of the inner segment portion 19.
- a seal ring 25 that seals between the inner and outer segment portions 18 and 19 is provided.
- the outer segment portion 18 is made of aluminum or an aluminum alloy (hereinafter sometimes collectively referred to as an aluminum-based metal), and the inner segment portion 19 is made of a stainless alloy.
- the core segments 9, 9 adjacent in the circumferential direction have no gap between the circumferential end faces 19 ⁇ / b> S of the inner segment portion 19,
- a gap G for thermal expansion is disposed between the circumferential end surfaces 18S of the outer segment portion 18.
- the gap G is kept constant and stable between the outer segment portions 18 and 18 attached to the inner segment portion 19. Is done. And since the inner segment part 19 consists of a stainless alloy with a small thermal expansion, the influence by the thermal expansion at the time of vulcanization
- the aluminum-based metal has high thermal conductivity, it can be efficiently used for the inner heating of the raw tire by using it for the outer segment portion 18 having the tire molding surface S, and the energy efficiency during vulcanization is increased. sell.
- the stainless steel alloy forming the inner segment part 19 is harder and stronger than aluminum-based metals, so it is not easily deformed by thermal stress, and the inner segment part 19 contacts the core 5. Wear and damage are less likely to occur. Further, the stainless alloy forming the inner segment portion 19 is useful for improving the durability of the core body 3 such as securing the mounting strength of the core side connectors 21A and 21B (shown in FIG. 6) which will be described later. Note that the gap G differs depending on the number of divisions of the core segment 9.
- the gap G in a normal temperature state (for example, 25 ° C.) before heating is preferably in the range of 0.08 to 0.18 mm when the number of divisions of the core segment 9 is 8 to 12, for example.
- the thermal expansion is insufficiently absorbed.
- the gap G exceeds 0.18 mm, even when the vulcanization temperature (for example, 180 ° C.) is reached, the gap G is not blocked, and rubber flows in during vulcanization molding, resulting in burrs on the inner surface of the finished tire. Tend to occur.
- the core 5 has a cylindrical shape and is inserted into the center hole 3H of the core body 3. Thereby, each core segment 9 is prevented from moving inward in the radial direction.
- One end of the core 5 in the axial direction is fixed to the inner surface of the side wall 6L on the one axial side.
- the said side wall body 6L and the core 5 are fixed using a volt
- the side wall body 6L and the core 5 can also be fixed by welding etc., for example.
- the side wall body 6L on one side includes a disk-shaped side plate portion 11 provided around the flange portion 11A that contacts the tapered surface 7 of the core body 3. By contact between the tapered surface 7 and the flange portion 11A, the side wall body 6L and the core body 3 are aligned concentrically.
- the core 5 includes an inner screw portion 13 on the other side in the axial direction of the center hole 5H in this example.
- a first dovetail joint portion 16 formed of one of the dovetail groove 14 or the dovetail tenon 15 extending continuously in the axial direction is formed on the outer peripheral surface of the core 5.
- the inner peripheral surface of each core segment 9, in this example, the inner segment portion 19 extends from the other of the dovetail groove 14 or the dovetail tenon 15 extending in the axial direction and engaging the first dovetail joint portion 16.
- a second dovetail portion 17 is formed.
- a dovetail groove 14 is formed as the first dovetail joint 16, and an ant tenon 15 is formed as the second dovetail joint 17.
- the ant tenon 15 may be formed as the first ant joint 16 and the ant groove 14 may be formed as the second ant joint 17.
- the dovetail groove 14 and the dovetail 15 have a substantially trapezoidal cross section in which both side surfaces are inclined in the direction of increasing the width toward the groove bottom and the tenon tip, By engaging each other, they are connected so as to be relatively movable only in the axial direction.
- the side wall 6U on the other side in the axial direction also has a disk-like shape provided with a flange portion 11A that can be aligned concentrically by contacting the tapered surface 7 of the core body 3.
- a side plate portion 11 is provided.
- a boss portion 11B (shown in FIG. 1) that can be detachably screwed into the inner screw portion 13 provided in the core 5 is projected from the inner side surface of the side plate portion 11. Then, the side wall bodies 6L and 6U prevent the core segments from moving inward in the radial direction.
- support shaft portions 12 are projected from the outer surface of each side plate portion 11.
- the support shaft portion 12 holds the rigid core 1 by a conveying device and conveys it to a raw tire forming machine or a vulcanization mold, or the conveyed rigid core 1 is a raw tire forming machine, It functions as a mounting part for mounting on vulcanizing molds, cooling devices, and the like.
- the support shaft portion 12 is, in this example, a chuck portion 36 of a transport device that holds the support shaft portion 12 via a connecting means 20 having a ball lock mechanism, or the support shaft portion 12.
- the support shaft portion 36 such as a raw tire forming machine, a vulcanizing mold 50, and a cooling device in a single touch.
- the connecting means 20 includes a connecting hole portion 26 concentrically recessed at each outer end portion of the support shaft portion 12 and provided with a circumferential groove 26A on the inner peripheral surface.
- a connecting cylinder part 27 that is concentrically protruded from the outer end of the chuck part 36 and is inserted into the connecting hole part 26, and a ball lock means 28 that locks between the connecting hole part 26 and the connecting cylinder part 27.
- the ball locking means 28 includes a rigid ball 30 distributed in the circumferential direction of the connecting cylinder portion 27 and held in a plurality of through holes 29 penetrating inward and outward in the radial direction, and a cylinder chamber 31 provided in the chuck portion 36.
- the piston piece 33 that is housed in the cylinder chamber 31 and can move in and out in the axial direction within the chuck portion 36 by supplying and discharging compressed air to and from the cylinder chamber 31, and the center hole 27 ⁇ / b> H of the connecting cylinder portion 27.
- a plunger 34 connected to the piston piece 33 so as to move integrally therewith.
- the plunger 34 can move outward in the axial direction within the center hole 27H of the connecting cylinder portion 27 by the piston piece 33. As a result of this movement, the outer peripheral surface of the plunger 34 abuts on each of the rigid balls 30 and pushes it up radially outward, and the rigid balls 30 can be pressed against the circumferential groove 26A and locked.
- the plunger 34 can be moved axially inward in the center hole 27H of the connecting cylinder portion 27 by the piston piece 33, thereby releasing the push-up of the rigid ball 30 outward in the radial direction. The lock between the part 26 and the connecting cylinder part 27 is released.
- the outer peripheral surface of the plunger 34 is tapered toward the outer side in the axial direction.
- an airtight chamber chamber 38 filled with a thermal fluid is formed inside each core segment 9. Further, the side surface 9Ls on one side in the axial direction of the core segment 9 is electrically connected to the thermal fluid supply side and exhaust side mold side connectors 22A and 22B provided in the vulcanizing mold 50 and connected to the chamber chamber 38, respectively. Possible connection ports 21A1 and 21B1 of the core side connectors 21A and 21B are opened. When the rigid core 1 is put into the vulcanizing mold 50, the one side surface 9Ls becomes the lower surface.
- the chamber chamber 38 includes a recess 18 ⁇ / b> A that is recessed in the radially inner surface of the outer segment portion 18.
- the inner surface shape of the recess 18 ⁇ / b> A approximates the outer surface shape of the outer segment portion 18. Accordingly, the outer segment portion 18 has a shell shape surrounded by an outer shell 18W having a substantially uniform thickness, and can perform inner heating at a uniform temperature.
- the core-side connectors 21A and 21B are attached to the inner segment portion 19 and are electrically connected to the chamber chamber 38 via the intake side flow passage 39A and the exhaust side flow passage 39B extending through the inner segment portion 19. Yes.
- the opening 39A1 of the intake side flow path 39A and the opening 39B1 of the exhaust side flow path 39B are formed at a distance in the axial direction.
- the opening 39B1 of the exhaust side flow path 39B is formed on the side close to the one side surface 9Ls which is the lower surface. Thereby, the water (drain) which a part of steam which is a thermal fluid condenses in the chamber chamber 38 is effectively discharged
- a first chamber chamber portion 38A that leads the chamber chamber 38 to the supply port 22A1 of the mold side connector 22A, and a mold side connector.
- a partition plate 40 is attached that is partitioned into a second chamber chamber 38B that communicates with the 22B exhaust port 22B1.
- the partition plate 40 forms a gap J between the first and second chamber chamber portions 38A and 38B between the inner wall surface of the chamber chamber 38.
- the core-side connectors 21A and 21B are connected to the mold-side connectors 22A and 22B when the rigid core 1 is inserted into the vulcanization mold 50.
- the connecting direction between the core side connector 21A and the mold side connector 22A and the connecting direction between the core side connector 21B and the mold side connector 22B are both axial directions. These are connected by relative movement in the axial direction between the vulcanizing mold 50 and the rigid core 1 at the time of charging, for example, by raising the vulcanizing mold 50 or lowering the rigid core 1.
- the core side connectors 21A and 21B and the mold side connectors 22A and 22B can employ so-called automatic detachable connector pairs 41 and 42 that can be automatically detachable from each other.
- One connector 41 includes a base tube portion 44 having a center hole 43, a valve shaft 45 capable of opening and closing a valve seat 43a provided in the center hole 43, and urging the valve shaft 45 forward toward the valve seat 43a. And a spring piece 46.
- the base tube portion 44 has a stepped tube shape in which a small diameter connection tube portion 44b is provided in front of the body portion 44a attached to the core segment 9.
- a seal ring 47 that seals between the core segment 9 and the core segment 9 is disposed on the body portion 44a.
- the center hole 43 includes the valve seat 43a having a cone surface shape having a small diameter toward the front at a front end portion thereof.
- the valve shaft 45 is slidable back and forth by a head 45a that abuts the valve seat 43a and closes the valve seat 43a, and a holding cylinder 48 that extends rearward from the head 45a and is fixed to the center hole 43. And a shaft portion 45b to be held.
- the spring piece 46 is extrapolated to the shaft portion 45b and normally closes the valve seat 43a.
- the other connector 42 also has a base tube portion 54 having a center hole 53, a valve shaft 55 capable of opening and closing a valve seat 53a provided in the center hole 53, and the valve shaft 55 attached to the front toward the valve seat 53a. And a spring piece 56 to be energized.
- the base tube portion 54 is a step in which a large diameter connecting tube portion 54b is provided on the front end side of the body portion 54a that attaches to the bead ring 50a that forms the bead outer surface of the tire in the vulcanizing mold 50. It has a cylindrical shape.
- a seal ring 57 that seals between the body portion 54a and the bead ring 50a is disposed.
- the center hole 53 includes a cone-shaped valve seat 53a having a small diameter toward the front, a connection hole 53b that is disposed on the front side of the valve seat 53a and fits into the connection cylinder portion 44b, An accommodation hole 53c is provided on the rear side of the seat 53a and accommodates the valve shaft 55.
- a seal ring 59 that seals between the connection tube portion 44b is disposed in the connection hole portion 53b.
- the valve shaft 55 is slidable back and forth by a head 55a that contacts the valve seat 53a and closes the valve seat 53a, and a holding cylinder 58 that extends backward from the head 55a and is fixed to the receiving hole 53c. And a projecting pin portion 55c extending forward from the head portion 55a.
- the spring piece 56 is extrapolated to the shaft portion 55b, and normally closes the valve seat 53a.
- the connectors 41 and 42 are connected by inserting the connection tube portion 44b of the connector 41 into the connection hole portion 53b of the connector 42.
- the protruding pin portion 55c of the valve shaft 55 of the connector 42 comes into contact with the head portion 45a of the valve shaft 45 of the connector 41, so that both valve shafts 45 and 55 are retracted.
- the valve seats 43a and 53a are opened.
- the connectors 41 and 42 are electrically connected.
- One connector 41 may be attached to the vulcanization mold 50 side, and the other connector 42 may be attached to the core segment 9 side.
- the rigid core 1 of the present embodiment forms an airtight chamber chamber 38 filled with a thermal fluid inside each core segment 9. Therefore, even when the gap G for thermal expansion is formed between the core segments 9 and 9, leakage of the thermal fluid can be reliably prevented.
- the mold side connectors 22 ⁇ / b> A and 22 ⁇ / b> B provided on the vulcanization mold 50 are provided on the side surface 9 ⁇ / b> Ls on one side in the axial direction of the core segment 9.
- the connection ports 21A1, 21B1 of the core side connectors 21A, 21B that can be connected are opened.
- the connecting direction between the mold side connectors 22A and 22B and the core side connectors 21A and 21B is the axial direction, when inserting the rigid core 1 into the vulcanizing mold 50, a special thermal fluid connection operation is performed. Therefore, the core side connectors 21A and 21B of the core segments can be connected to the mold side connectors 22A and 22B all at once. Therefore, the rigid core can be easily mounted in the vulcanization mold.
- the first dovetail portion 16 extending in the axial direction is formed on the outer peripheral surface of the core 5, and the second extended in the axial direction on the inner peripheral surface of each core segment 9.
- a dovetail portion 17 is formed. Therefore, the displacement of the core segment 9 is prevented by the engagement between the first and second dovetail joint portions 16 and 17, and the assembly accuracy of the rigid core 1 is increased. As a result, there is no positional deviation between the above-described core-side connectors 21A and 21B and the mold-side connectors 22A and 22B, and the connection can be made more easily.
- a hot gas having a temperature higher than the vulcanization temperature for example, 180 to 220 ° C., particularly steam having a large heat capacity can be suitably employed as the heat fluid.
- the rigid core 1 immediately after being taken out from the vulcanization mold 50 is dangerous because it is in a high-temperature state close to 180 ° C., and since the members mesh with each other due to thermal expansion, it is difficult to disassemble as it is. For this reason, the rigid core 1 needs to be forcibly cooled. Therefore, for the rigid core 1 taken out from the vulcanization mold 50, the chamber body 38 is filled with a cooling thermal fluid such as cooling water to forcibly cool the core body 3. Is preferred. By adjusting the temperature and flow rate of the cooling water and cooling the temperature of the core body 3 from 180 to 40 ° C. in a time of about 3 minutes, over-vulcanization is prevented, and tire production efficiency is further improved. improves.
- a cooling thermal fluid such as cooling water
- FIG. 10 shows an example of assembly of the core segment 9.
- the side wall body 6L is held at the upper end of a core assembly table 60 having a chuck portion 60A having the same configuration as the chuck portion 36.
- the core 5 is erected integrally with the side wall body 6L.
- core segments 9 suspended by an arm 61 are lowered and attached to the periphery of the core 5 one by one.
- the locking recess 62 locked to the arm 61 is formed on the inner surface in the radial direction of the inner segment portion 19 in this example.
- Each core segment 9 is attached around the core 5.
- the rigid core 1 is assembled by screwing the side wall body 6U on the other side in the axial direction into the inner screw portion 13 of the core 5.
- the side wall body 6U may employ various known attaching / detaching means instead of screws.
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Abstract
Description
タイヤ周方向に分割される複数の中子セグメントからなり、かつ該中子セグメントが半径方向内側に移動することにより分解可能な前記中子本体、
前記中子本体の中心孔に内挿されて各前記中子セグメントの半径方向内側への移動を阻止する円筒状のコア、
並びに前記中子本体の軸心方向両側に配されることにより各中子セグメントの軸心方向への移動を阻止する側板部を有する一対の側壁体とを具え、
しかも前記コアの半径方向外周面には、軸心方向にのびる蟻溝又は蟻ほぞの一方からなる第1の蟻継ぎ部が設けられ、かつ各中子セグメントの半径方向内周面には、軸心方向にのびかつ前記第1の蟻継ぎ部に係合する蟻溝又は蟻ほぞの他方からなる第2の蟻継ぎ部が設けられるとともに、
前記軸心方向一方側の側壁体は、前記コアの一方側の端部に固定され、かつ軸心方向他方側の側壁体は、前記コアの他方側の端部に着脱自在に取り付き、
しかも各前記中子セグメントの内部に、熱流体が充填される気密なチャンバー室が形成されるとともに、
該中子セグメントの軸心方向一方側の側面に、前記チャンバー室に導通しかつ前記加硫金型内への投入により該加硫金型に設ける熱流体の供給口及び排気口と接続しうる接続口を有する中子側コネクタの前記接続口を開口させたことを特徴としている。
加熱前の常温状態の中子本体において、周方向で隣り合う中子セグメント同士は、内セグメント部の周方向端面間では隙間がなく、かつ外セグメント部の周方向端面間では、熱膨張用の隙間Gを有することを特徴としている。
図1、2に示すように、本実施形態の剛性中子1は、外表面にタイヤ成形面Sを有する環状の中子本体3を具える。
3 中子本体
3H 中心孔
5 コア
6L、6U 側壁体
9 中子セグメント
9Ls 側面
11 側板部
14 蟻溝
15 蟻ほぞ
16 第1の蟻継ぎ部
17 第2の蟻継ぎ部
18 外セグメント部
19 内セグメント部
21A、21B 中子側コネクタ
21A1、21B1 接続口
22A1 供給口
22B1 排気口
38 チャンバー室
38A 第1のチャンバー室部
38B 第2のチャンバー室部
40 隔壁板
50 加硫金型
J 間隙部
S タイヤ成形面
T 生タイヤ
Claims (6)
- 外表面にタイヤ成形面を有しかつこのタイヤ成形面上で生タイヤが形成される環状の中子本体を具え、かつ前記生タイヤごと加硫金型内に投入されることにより前記加硫金型と協働して生タイヤを加熱加硫する剛性中子であって、
タイヤ周方向に分割される複数の中子セグメントからなり、かつ該中子セグメントが半径方向内側に移動することにより分解可能な前記中子本体、
前記中子本体の中心孔に内挿されて各前記中子セグメントの半径方向内側への移動を阻止する円筒状のコア、
並びに前記中子本体の軸心方向両側に配されることにより各中子セグメントの軸心方向への移動を阻止する側板部を有する一対の側壁体とを具え、
しかも前記コアの半径方向外周面には、軸心方向にのびる蟻溝又は蟻ほぞの一方からなる第1の蟻継ぎ部が設けられ、かつ各中子セグメントの半径方向内周面には、軸心方向にのびかつ前記第1の蟻継ぎ部に係合する蟻溝又は蟻ほぞの他方からなる第2の蟻継ぎ部が設けられるとともに、
前記軸心方向一方側の側壁体は、前記コアの一方側の端部に固定され、かつ軸心方向他方側の側壁体は、前記コアの他方側の端部に着脱自在に取り付き、
しかも各前記中子セグメントの内部に、熱流体が充填される気密なチャンバー室が形成されるとともに、
該中子セグメントの軸心方向一方側の側面に、前記チャンバー室に導通しかつ前記加硫金型内への投入により該加硫金型に設ける熱流体の供給口及び排気口と接続しうる接続口を有する中子側コネクタの前記接続口を開口させたことを特徴とする剛性中子。 - 各前記中子セグメントは、前記タイヤ成形面を有する半径方向外側の外セグメント部と、その半径方向内側に隣接される内セグメント部とからなり、前記内セグメント部の軸心方向一方側の側面に、接続口を開口させたことを特徴とする請求項1記載の剛性中子。
- 前記外セグメント部は、アルミニウム又はアルミニウム合金からなり、かつ内セグメント部はステンレス合金からなるとともに、
加熱前の常温状態の中子本体において、周方向で隣り合う中子セグメント同士は、内セグメント部の周方向端面間では隙間がなく、かつ外セグメント部の周方向端面間では、熱膨張用の隙間Gを有することを特徴とする請求項2記載の剛性中子。 - 前記外セグメント部の周方向端面間の隙間Gは、0.08~0.18mmであることを特徴とする請求項3記載の剛性中子。
- 前記チャンバー室は、このチャンバー室を、供給口に通じる第1のチャンバー室部と、排気口に通じる第2のチャンバー室部とに区画する隔壁板を具えるとともに、該隔壁板は、前記チャンバー室の内壁面との間に、前記第1、第2のチャンバー室部間を導通させる間隙部を形成することを特徴とする請求項1~4の何れかに記載の剛性中子。
- 前記中子本体は、加硫金型から取り出された後、前記チャンバー室内に冷却用の熱流体が充填されることを特徴とする請求項1~5の何れかに記載の剛性中子。
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JP5913266B2 (ja) | 2013-11-27 | 2016-04-27 | 住友ゴム工業株式会社 | タイヤの製造方法 |
JP6196543B2 (ja) * | 2013-12-02 | 2017-09-13 | 住友ゴム工業株式会社 | タイヤ加硫機、及びそれを用いたタイヤ製造方法 |
JP6185828B2 (ja) * | 2013-12-02 | 2017-08-23 | 住友ゴム工業株式会社 | タイヤ加硫機、及びそれを用いたタイヤ製造方法 |
JP6354403B2 (ja) * | 2014-07-09 | 2018-07-11 | 横浜ゴム株式会社 | タイヤのユニフォミティ修正方法 |
JP6354405B2 (ja) * | 2014-07-09 | 2018-07-11 | 横浜ゴム株式会社 | タイヤのユニフォミティ修正方法 |
JP6354404B2 (ja) * | 2014-07-09 | 2018-07-11 | 横浜ゴム株式会社 | タイヤのユニフォミティ修正方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56162631A (en) * | 1980-05-02 | 1981-12-14 | Sumitomo Rubber Ind Ltd | Tire molding drum |
JPH0557760A (ja) * | 1991-09-03 | 1993-03-09 | Copal Co Ltd | アンダーカツト部を有する射出成形金型 |
JP2001088143A (ja) * | 1999-08-10 | 2001-04-03 | Sedepro | タイヤ製造用の2つの部分からなる剛性コア |
JP2003311741A (ja) * | 2002-04-23 | 2003-11-05 | Bridgestone Corp | タイヤ製造用コア |
JP2006297599A (ja) * | 2005-04-15 | 2006-11-02 | Bridgestone Corp | 生タイヤの加熱方法および装置 |
JP2007152957A (ja) * | 2005-12-02 | 2007-06-21 | Goodyear Tire & Rubber Co:The | タイヤ製造用コアのラッチ機構および移動機構 |
JP2008062496A (ja) * | 2006-09-07 | 2008-03-21 | Bridgestone Corp | タイヤ成形用剛体コアの加熱方法および装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6113833A (en) * | 1997-07-22 | 2000-09-05 | Bridgestone Corporation | Segmented toroidal core for manufacturing pneumatic tires |
JP4056290B2 (ja) * | 2002-04-30 | 2008-03-05 | 株式会社ブリヂストン | 空気入りタイヤの製造方法および装置 |
ATE344131T1 (de) * | 2003-09-05 | 2006-11-15 | Michelin Soc Tech | Verfahren zur herstellung von zur herstellung von reifen dargestellten formkernen bzw. hergestellte reifen und vorrichtung zur reifenherstellung |
US20050133149A1 (en) * | 2003-12-19 | 2005-06-23 | Sieverding Mark A. | Single station tire curing method and apparatus |
-
2011
- 2011-06-24 JP JP2011141039A patent/JP5432955B2/ja active Active
-
2012
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56162631A (en) * | 1980-05-02 | 1981-12-14 | Sumitomo Rubber Ind Ltd | Tire molding drum |
JPH0557760A (ja) * | 1991-09-03 | 1993-03-09 | Copal Co Ltd | アンダーカツト部を有する射出成形金型 |
JP2001088143A (ja) * | 1999-08-10 | 2001-04-03 | Sedepro | タイヤ製造用の2つの部分からなる剛性コア |
JP2003311741A (ja) * | 2002-04-23 | 2003-11-05 | Bridgestone Corp | タイヤ製造用コア |
JP2006297599A (ja) * | 2005-04-15 | 2006-11-02 | Bridgestone Corp | 生タイヤの加熱方法および装置 |
JP2007152957A (ja) * | 2005-12-02 | 2007-06-21 | Goodyear Tire & Rubber Co:The | タイヤ製造用コアのラッチ機構および移動機構 |
JP2008062496A (ja) * | 2006-09-07 | 2008-03-21 | Bridgestone Corp | タイヤ成形用剛体コアの加熱方法および装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103286893A (zh) * | 2013-05-28 | 2013-09-11 | 三角轮胎股份有限公司 | 轮胎直压成型电磁感应加热硫化方法及其专用内模 |
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