JP6498401B2 - Tire manufacturing method and tire manufacturing facility - Google Patents

Description

  The present invention relates to a tire manufacturing method, and more particularly to a tire manufacturing method using a vulcanized can and a tire manufacturing facility.

  Conventionally, a method using a vulcanized can is known as an example of a so-called retreaded tire manufacturing method. The manufacturing method is generally a tire molding in which a tread portion of a used tire is cut and buffed with a predetermined cutting machine or the like, and then the tread rubber is adhered to the buffed surface via an unvulcanized cushion rubber. The used tires after buffing are put into the vulcanizing can by putting the used tire with the process and unvulcanized tread rubber into the vulcanizing can, and vulcanizing the cushion rubber under the specified temperature and pressure ( Tire tire) and a tire vulcanization process in which tread rubber is integrated. As shown in Patent Document 1, the vulcanizing can has a structure in which the temperature and pressure of the air taken in from the outside through the compressor are increased by a heat source installed inside, and the vulcanization proceeds at high temperature and high pressure. is there. Here, in order to proceed with the vulcanization of the cushion rubber, it is necessary to increase the temperature inside the vulcanization can, for example, higher than 100 ° C. (hereinafter sometimes referred to as the minimum vulcanization temperature) and maintain it. is there. The minimum vulcanization temperature varies depending on the physical properties of the cushion rubber, and generally vulcanization proceeds in the range of 100 ° C to 150 ° C.

  However, in the conventional vulcanizing can, every time one vulcanization is completed, the air inside the vulcanizing can is discharged and opened to the atmosphere, so that the internal temperature decreases every time vulcanization is completed, Each time the next vulcanization is started, it is necessary to raise the internal temperature until it becomes higher than the minimum vulcanization temperature. And the time required to raise the internal temperature once lowered again hinders the improvement of manufacturing efficiency.

JP 2013-22764 A

  The present invention has been made in view of the above problems, and provides a tire manufacturing method and the like capable of improving the tire manufacturing efficiency.

As a tire manufacturing method for solving the above-described problem, a tire having a base tire and a tread rubber integrated with an unvulcanized cushion rubber on the outer peripheral surface of the base tire can be accommodated in a reduced pressure state. A tire manufacturing method comprising: a preheating step of storing in a container and preheating in a preheating chamber; and a vulcanization step of vulcanizing the preheated tire by placing it in a vulcanization can, In the preheating step, the tire was preliminarily vulcanized by the vulcanization can and the exhaust heat discharged from the vulcanization can was used as a heat source, and the tire was preheated in the vulcanization step. It was set as the aspect which heats a tire by supplying the air in a preheating warehouse in a container .
According to this aspect, in the preheating chamber, a tire having a base tire and a tread rubber integrated with an unvulcanized cushion rubber on the outer peripheral surface of the base tire is preceded by the vulcanization can. Since the preheated vulcanized tire and the exhaust heat exhausted from the vulcanized can are preheated in advance, the time required to raise the tire to the minimum vulcanization temperature with the vulcanized can is greatly reduced. It is possible to improve the tire manufacturing efficiency. Further, in the vulcanization process, if the air in the preheating chamber heated in the preheating process is supplied into the container for housing the tire, the tire can be directly heated in the container. The time required to raise the tire to the minimum vulcanization temperature can be reduced.
In the vulcanization process, if the air in the preheating chamber heated in the preheating process is supplied into the vulcanization can, the temperature in the vulcanization can is set higher than the minimum vulcanization temperature. The time required can be greatly reduced.
Further, as a tire manufacturing facility for solving the above-mentioned problems, a tread rubber which is accommodated in a container in a decompressed state and is integrated via an unvulcanized cushion rubber on the outer peripheral surface of the base tire and the base tire communicating with the preheating chamber, a vulcanizing can to vulcanize the tire, which is preheated in the preheating chamber, and the receiving device of the tire to be accommodated in the pre-heating chamber in the pressure within the vulcanizer to accommodate tires having A tire manufacturing facility equipped with a tire side supply / discharge pipe , wherein the preheating chamber is a tire which is vulcanized in advance in a vulcanizing can, and the vulcanized can The exhaust heat exhausted is preliminarily heated as a heat source, and the air in the preheating chamber is supplied into the container through the tire side supply / exhaust pipe at the time of vulcanization by the vulcanizing can.
According to this configuration, the tire having the tread rubber which is accommodated in the container in a reduced pressure state by the preheating chamber and integrated via the unvulcanized cushion rubber on the outer peripheral surface of the base tire. The tire is pre-heated in advance by using the tire vulcanized in advance in the vulcanization can and the exhaust heat discharged from the vulcanization can as a heat source. Therefore, the time required for this can be significantly reduced, and the manufacturing efficiency of the tire can be improved. Further, it is possible to directly heat the vulcanizer according vulcanization to the tire side supply and discharge tube containing assembly unvulcanized tire since supplying air in the preheating chamber into the container through the The time required to raise the tire to the minimum vulcanization temperature can be reduced.
In addition, a supply / exhaust pipe communicating with the inside of the preheating chamber and the inside of the vulcanization can is provided, and the supply / exhaust pipe supplies air in the vulcanization can into the preheating chamber after vulcanization by the vulcanization can is completed, If the air in the preheating chamber is supplied into the vulcanization can at the start of vulcanization, the time required to raise the temperature in the vulcanization can higher than the minimum vulcanization temperature while suppressing energy loss. It can be greatly reduced.
The summary of the invention does not enumerate all necessary features of the present invention, and individual configurations constituting the feature group can also be the invention.

It is a schematic diagram showing the whole tire manufacturing equipment. It is a schematic sectional drawing of a tire and an envelope. It is the schematic which shows a tire preheating warehouse. It is a general | schematic permeation | transmission figure which shows the inside of a vulcanization can. It is a schematic perspective view which shows a conveyance mechanism. It is sectional drawing of a rail frame and a slider.

  Hereinafter, the present invention will be described in detail through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included in the invention. It is not always essential to the solution.

Drawing 1 is an outline figure showing the whole tire manufacture equipment 1 concerning an embodiment.
As shown in the figure, the manufacturing facility 1 temporarily divides a tire molding chamber 2 for molding a tire T, a tire T molded in the tire molding chamber 2, and a tire T 'after completion of vulcanization. And a vulcanizing can 30 for vulcanizing the tire T temporarily accommodated in the preheating chamber 20. Movement of the tire T before vulcanization indicated by arrow A1 from the tire molding chamber 2 to the preheating chamber 20, movement from the preheating chamber 20 to the vulcanization can 30, and tire after completion of vulcanization indicated by arrow B1 The movement of T ′ from the vulcanizing can 30 to the preheating chamber 20 and the movement from the preheating chamber 20 to the next process are managed in a unified manner by a transfer mechanism 50 described later, and no person is involved. The opening / closing operation of the opening / closing doors 22; 24 (see FIG. 3) of the preheating chamber 20, which will be described later, the supply / discharge of air to / from the vulcanizing can 30, the vulcanization start / stop operation, or the operation of the transport mechanism 50 It is assumed that it is controlled by the central control means 70 consisting of

  Hereinafter, until the unvulcanized tire T molded in the tire molding chamber 2 is completed (until transported to the next process), it will be described in detail along with a description of the manufacturing process and manufacturing equipment in time series. As shown in FIG. 1, in the following description, it is assumed that the previously formed tire T is already vulcanized in the vulcanizing can 30, and further, in the preheating chamber 20, by the vulcanizing can 30. It is assumed that the previously vulcanized tire T ′ is temporarily stored.

[Tire molding room and tire molding process]
First, an outline of the molding process of the tire T performed in the tire molding chamber 2 will be described. As shown in FIG. 1, the tire T is molded in a tire molding chamber 2 in which a plurality of tire molding drums 3 are installed. The forming drum 3 includes a rim portion 3a having an outer diameter corresponding to the inner diameter of the bead portion of the base tire Tb. The base tire Tb is a tire after the tread portion of the used tire is removed. As shown in FIG. 2, when the tire T is molded, the molding drum 3 is rotated in a state where the base tire Tb is fitted through the rim portion 3a, and the tire Tb is vulcanized on the circumferential surface of the base tire Tb. A semi-vulcanized belt-like tread rubber G is adhered via an unvulcanized cushion rubber C. Various tread patterns are formed on the tread rubber G by, for example, a pre-press type vulcanizer. The tread rubber G and the base tire Tb adhered through the cushion rubber C are still in an incomplete state. However, by vulcanizing the cushion rubber C interposed therebetween, the two are integrated. The tire T ′ thus obtained can be obtained. The base tire Tb to which the tread rubber G is adhered is accommodated in the envelope 5 and is sequentially suspended by suspension members 51 arranged along the extending direction of the slider 52 of the transport mechanism 50 (see FIG. 6).

  Although details will be described later, the slider 52 is a movable body that is movable across the tire molding chamber 2, the preheating chamber 20, and the vulcanizing can 30 in a state where a plurality of tires T are suspended. In this example, the slider 52 can transport a maximum of about 20 tires T at a time, and after the required number of tires T have been suspended, the slider 52 starts moving toward the preheating chamber 20, A plurality of tires T are conveyed to the preheating cabinet 20 side.

FIG. 2 is a schematic diagram showing the configuration of the envelope 5 as a container for housing the tire T. As shown in FIG.
As shown in the figure, the envelope 5 is a bag that covers the outer peripheral surfaces of the base tire Tb and the tread rubber G that are integrated via the cushion rubber C over the entire area. The envelope 5 includes a liner 8 having an inner peripheral surface 8a that is in direct contact with the outer peripheral surfaces of the base tire Tb and the tread rubber G, and a cover 9 that further covers the outer peripheral surface 8b of the liner 8. An air vent valve V <b> 1 is disposed on the outer peripheral surface 9 a of the cover 9. One end portion of the air vent valve V <b> 1 reaches the inner peripheral surface 8 a of the liner 8. The air present between the base tire Tb and the tread rubber G and the liner 8 is sucked by the air venting machine (not shown) through the air vent valve V1, so that the inner peripheral surface 8a of the liner 8 is brought to the base tire Tb. And it adheres over the whole outer peripheral surface of the tread rubber G, and presses the tread rubber G toward the base tire Tb. This air bleeding operation is performed, for example, before the hanging work to the hanging tool 51.

  An air supply valve V <b> 2 is disposed on the outer peripheral surface 9 a of the cover 9. One end of the air supply valve V <b> 2 reaches the inner peripheral surface 9 b of the cover 9. An air tube 49a extending from the slider 52 side is connected to the air supply valve V2 (see FIG. 4). Although details will be described later, air in the preheating chamber 20 flows into the air supply valve V <b> 2 through the air tube 49 a during vulcanization, and is heated in the preheating chamber 20 between the liner 8 and the cover 9. Air is supplied. As described above, the envelope 5 according to the present embodiment has a function of pressing the tread rubber G toward the base tire Tb and a function of heating the tread rubber G, the cushion rubber C, and the base tire Tb as a whole. Note that the connection work between the air tube 49 a and the air supply valve V <b> 2 is performed during the suspension work to the suspension tool 51.

[Preheating chamber and preheating process]
Next, the preheating chamber 20 will be described with reference to FIG. FIG. 3 is a schematic plan view of the preheating cabinet 20. The preheating chamber 20 is accommodated in the envelope 5 in the tire molding chamber 2, vulcanized by the vulcanizing can 30 after the plurality of tires T suspended from the slider 52, and suspended from the slider 56. It has a size that can accommodate a plurality of tires T ′ in a state of being formed at the same time. A heat insulating material 20a is laid on the floor partitioning the preheating chamber 20, the surrounding side walls rising from the floor surface, and the inner peripheral surface of the ceiling, and the temperature drop inside is suppressed.

  On the side wall 21 a on the tire molding chamber 2 side in the preheating chamber 20, an opening / closing door 22 capable of carrying the tire T from the tire molding chamber 2 is provided. The opening / closing operation of the opening / closing door 22 is controlled by the central control means 70 and is opened / closed according to the conveyance timing of the tire T from the tire molding chamber 2 side. The side wall 21a is provided with an opening / closing door 24 that can carry out the tire T ′ from the preheating chamber 20 to the outside (next process). The opening / closing operation of the opening / closing door 24 is also controlled by the central control means 70 in the same manner as the opening / closing door 22, and is opened / closed according to the conveyance timing of the tire T ′ from the preheating chamber 20 to the next process side. The inside of the preheating chamber 20 is substantially sealed when the open / close doors 22; 24 are closed, and the temperature in the chamber is maintained.

  The open / close door 34 of the vulcanizing can 30 is positioned on the side wall 21 b side of the preheating chamber 20 on the side of the vulcanizing can 30 so as to face the inside of the preheating chamber 20. By positioning the opening / closing door 34 on the inner side of the preheating chamber 20, the tire T accommodated in the preheating chamber 20 can be conveyed to the vulcanizing can 30 side without being exposed to the outside air. The opening / closing operation of the opening / closing door 34 is controlled by the central control means 70 in the same manner as the opening / closing doors 22 and 24, and is opened / closed according to the timing of transporting the tire T to the vulcanizing can 30 side.

  The temperature t1 in the preheating chamber 20 is a vulcanized tire T ′ temporarily accommodated before being transferred to the next process, and a vulcanized can through the can-side discharge pipe 44 when vulcanization of the tire T ′ is completed. The exhausted air (exhaust heat) at the temperature t2 exhausted from the inside of 30 is maintained at a predetermined temperature using the heat source. The temperature t1 is naturally higher than the outside temperature of the preheating chamber 20, and the vulcanization of the unvulcanized tire T conveyed from the tire molding chamber 2 side does not proceed and is conveyed from the vulcanization can 30 side. The vulcanized tire T ′ is set to a temperature lower than the minimum vulcanization temperature of the tire T (for example, 90 ° C.) so as not to be overvulcanized. The state (preliminary heating state) in which both the tire T and the tire T ′ as a part of the heat source are accommodated in the preheating chamber 20 is a tire T (illustrated in the drawing) that has been conveyed into the vulcanizing can 30 in advance. Until the vulcanization of the tire T) suspended by the slider 54 is completed, the temperature of the tire T conveyed into the preheating chamber 20 gradually increases during this time.

[Vulcanization can and vulcanization process]
After the lapse of time from when the tire T is conveyed into the preheating chamber 20 until the vulcanization of the tire T previously carried into the vulcanizing can 30 is completed, the preliminarily heated tire T Is transferred into the vulcanizing can 30 by the movement of the slider 52 toward the vulcanizing can 30.
When transporting to the vulcanizing can 30 side, first, the slider 56 moves along the extending direction of a rail frame 55B described later, and the tire T ′ in the preheating chamber 20 used as a part of the heat source opens and closes. It is conveyed to the next process outside the preheating cabinet 20 through the door 24. Although a detailed description is omitted, the next process includes a marking process, an appearance, an interior inspection, and the like, and the tire T ′ that has undergone the process becomes the final product.

  Next, exhaust air is supplied from the inside of the vulcanization can 30 to the inside of the preheating chamber 20 through the can side discharge pipe 44, and the inside of the preheating chamber 20 is heated. Details of the can-side discharge pipe 44 will be described later. Next, the opening / closing door 34 of the vulcanizing can 30 is opened, and the slider 54 in the vulcanizing can 30 moves to the preheating chamber 20 side along the extending direction of the rail frame 55C, and further rail rails 57A and 57B. It moves to the rail frame 55B side along the extending direction. The tire T ′ moved to this position is used as a new heat source for heating the inside of the preheating chamber 20 together with the exhaust air described above, and is temporarily stored until the vulcanization of the tire T suspended from the slider 52 is completed. Is done.

  Finally, the tire T preheated in the preheating chamber 20 is conveyed into the vulcanizing can 30. Specifically, the slider 52 moves toward the rail frame 55C along the extending direction of the rail frames 57A and 57B. Thereafter, the slider 52 moves into the vulcanizing can 30 along the extending direction of the rail frame 55C, and stops at the specified position. When the slider 52 stops at the specified position in the vulcanizing can 30, all tires T are put into the vulcanizing can 30 and new vulcanization by the vulcanizing can 30 is started.

  FIG. 4 is a schematic transparent view showing the internal configuration of the vulcanizing can 30. As shown in the figure, the vulcanizing can 30 includes a cylindrical container main body 32 and an opening / closing door 34 provided at one end side of the container main body 32 so as to be freely opened and closed. The container main body 32 functions as a pressure container that forms a sealed space when the open / close door 34 is closed. A blower fan 36 and a heater 40 are installed on the other end side of the container main body 32. The blower fan 36 rotates according to the rotational force of a motor (not shown) that is driven according to a control signal from the central control means 70, and sends the air in the vulcanizing can 30 toward the open / close door 34 side. The air sent to the opening / closing door 34 side is reversed by an arc-shaped end plate portion 34 a formed on the inner surface side of the opening / closing door 34, and circulates in the vulcanizing can 30 as a flow toward the blower fan 36 side. The heater 40 heats the air circulating in the vulcanizing can 30, maintains the temperature t <b> 2 in the vulcanizing can 30 higher than the lowest vulcanizing temperature of the conveyed tire T, and heats the tire T. That is, the tire T is gradually heated by convection heat transfer by air convection in the vulcanizing can 30. The control of the heater 40 is also executed by the central control means 70.

  As shown in the figure, the container body 32 has a can side supply pipe 42 for supplying air from the outside of the vulcanizing can 30 and a can side discharge for discharging the air inside the vulcanizing can 30 to the outside. A pipe 44 is connected to a tire-side supply pipe 46 for supplying air into the envelope 5 that accommodates each tire T, and a tire-side discharge pipe 48 for discharging the air in the envelope 5 to the outside. The can-side supply pipe 42 has one end opening that terminates inside the container main body 32 and the other end opening that terminates inside the preheating chamber 20 as shown in FIG. 3. That is, the can side supply pipe 42 allows the preheating chamber 20 and the vulcanization can 30 to communicate with each other. On the flow path of the can side supply pipe 42, an air pump P1 that is driven in accordance with a control signal from the central control means 70 is installed, and the air at the temperature t1 heated in the preheating chamber 20 Press fit into. By driving the air pump P1, the pressure in the vulcanizing can 30 is increased to, for example, about 0.5 MPa.

  As with the can-side supply pipe 42, the can-side discharge pipe 44 has an opening at one end that terminates inside the container main body 32 and an opening at the other end inside the preheating chamber 20 as shown in FIG. 3. Terminate. On the flow path of the can side discharge pipe 44, an electromagnetic valve 44a that operates in accordance with a control signal of the central control means is disposed. The electromagnetic valve 44a is closed from the time of supplying air through the can-side supply pipe 42 at the start of vulcanization until the completion of vulcanization. On the other hand, after the vulcanization is completed, a new tire T is conveyed and is opened until vulcanization is started again. When the solenoid valve 44a is opened after the vulcanization is completed, the air maintained at a high pressure in the vulcanization can 30 flows into the preheating chamber 20 through the can-side discharge pipe 44, and the air in the preheating chamber 20 is removed. Used as a heat source for heating. As described above, the can-side supply pipe 42 and the can-side discharge pipe 44 constitute a supply / discharge pipe that allows the preheating chamber 20 and the vulcanization can 30 to communicate with each other, and air is supplied and discharged through each pipe.

  The tire-side supply pipe 46 is connected to one end of a common pipe 49 having an opening at one end formed along the extending direction inside the slider 52 via a joint. On the flow path of the tire side supply pipe 46, an air pump P2 and an electromagnetic valve 46a that are driven in accordance with a control signal of the central control means 70 are installed. Further, the tire side supply pipe 46 is connected so that the tire side discharge pipe 48 branches through an electromagnetic valve 48a. In order to supply the air at the temperature t1 heated in the preheating chamber 20 into the envelope 5, the electromagnetic valve 46a is opened, the electromagnetic valve 48a is closed, and the air pump P2 is driven. The connection between the tire side supply pipe 46 and the common pipe 49 formed in the slider 52 is automatically established when the slider 52 reaches a specified position in the vulcanizing can 30. Further, in the extending direction of the common conduit 49, air tubes 49a corresponding to the number of envelopes that individually accommodate the plurality of tires T are disposed.

  One end of the air tube 49a communicates with the common conduit 49, and the other end is connected to the air supply valve V2 disposed in the envelope 5 described above. That is, the tire-side supply pipe 46, the common pipe line 49, and the plurality of air tubes 49a form a flow path for heating the tire T accommodated in the vulcanizing can 30 with the air at the temperature t1. Further, in order to discharge the air supplied into the envelope 5, the electromagnetic valve 46a may be closed after the vulcanization is completed, and the electromagnetic valve 48a may be opened, and the air supplied into the envelope 5 in this state. Is discharged to the preheating chamber 20 side. As described above, the tire-side supply pipe 46 and the tire-side discharge pipe 48 constitute a supply / exhaust pipe that allows communication between the preheating chamber 20 and the inside of the envelope 5 that accommodates the tire T put into the vulcanizing can 30. Air is supplied and discharged through the pipe.

  As described above, the vulcanization can 30 and the preheating chamber 20 are connected to each other through the can side supply pipe 42 and the can side discharge pipe 44 so as to be able to circulate with each other. As a result, the time required to complete the vulcanization of the tire T newly conveyed to the vulcanizing can 30 can be greatly reduced, and the production efficiency is improved.

  Specifically, since the air heated to the temperature t1 in the preheating chamber 20 is supplied through the can-side supply pipe 42 at the start of vulcanization of the newly conveyed tire T, the vulcanized can after the start of vulcanization The time required to raise the temperature t2 within 30 to be higher than the minimum vulcanization temperature is shortened. Further, since the tire T newly conveyed into the vulcanizing can 30 is preheated in an atmosphere of the temperature t1 by temporary accommodation in the preheating chamber 20, the inside of the vulcanizing can 30 is The time to reach the minimum vulcanization temperature is greatly shortened by convective heat transfer from the circulating air. Further, as the heat source for heating the inside of the preheating chamber 20, air at a temperature t2 discharged upon completion of vulcanization performed in advance and tire T ′ conveyed after completion of vulcanization are used. Compared with the conventional one that discharges the air in the sulfur can 30 to the atmosphere, the energy efficiency and the production cost can be greatly improved. Furthermore, in the present embodiment, since the air heated to the temperature t1 in the preheating chamber 20 is supplied into the envelope 5 that accommodates each tire T newly transported into the vulcanizing can 30, vulcanization is performed. Compared to heating only by convection heat transfer using air circulating in the can 30, the tire T can be directly heated, and the time to reach the minimum vulcanization temperature can be greatly shortened. Thus, according to the manufacturing facility 1 according to the present embodiment, the time required for the vulcanization process that takes the most time in the manufacture of the retread tire can be greatly reduced. The production cycle can be made more efficient.

  Hereinafter, with reference to FIG. 5, an outline of the transport mechanism 50 provided over the tire molding chamber 2, the preheating chamber 20, and the vulcanizing can 30 will be described. FIG. 5 is a schematic perspective view of the transport mechanism 50 provided in the preheating cabinet 20. As shown in the figure, the transport mechanism 50 includes a plurality of rail frames 55A to 55C extending linearly from the tire molding chamber 2 in the direction of the vulcanizing can 30, and a direction orthogonal to the rail frames 55A to 55C. A frame unit 58 is provided which is combined with a rail frame 57A; The frame unit 58 is supported at a predetermined height on the floor surface of the preheating cabinet 20 by a support column (not shown). The rail frame 55 </ b> A is connected to one end side of the rail frames 57 </ b> A; 57 </ b> B, and one end thereof extends to the tire molding chamber 2. The tire T that has been molded in the tire molding chamber 2 is transported to the preheating chamber 20 side by a slider 52 that is movable along the extending direction of the rail frame 55A. The rail frame 55B is connected to the other end portion side of the rail frames 57A and 57B, and one end portion thereof extends to the next process. The tire T ′ temporarily stored as a heat source in the preheating chamber 20 is conveyed to the next process side by the slider 56 that can move along the extending direction of the rail frame 55B. The rail frame 55 </ b> C is connected to the rail frame 57 </ b> A; 57 </ b> B substantially at the center of the extension length of the rail frame 57 </ b> A; 57 </ b> B, and one end thereof extends to the inside of the vulcanizing can 30. The tire T preheated in the preheating chamber 20 or the tire T ′ that has been vulcanized by the vulcanizing can 30 is moved inside and outside the vulcanizing can 30 by a slider 54 that can move along the extending direction of the rail frame 55C. Be transported. Hereinafter, the slider that can move in the frame unit 58 will be described. Since the relationship and structure of each rail frame and the slider are the same, only one rail frame 55A and the slider 52 will be described as a representative.

  FIG. 6 is a view showing the rail frame 55A and the slider 52 in a cross section orthogonal to the extending direction thereof. As shown in the figure, the rail frame 55A is a hollow body having a substantially rectangular cross section. An opening 62a that extends continuously along the extending direction is formed in the lower surface 62 of the rail frame 55A. A slider 52 is movably provided in the rail frame 55A. As shown in the figure, the slider 52 includes a main body portion 64 inserted into the rail frame 55 </ b> A, and a tire suspension portion 66 connected to the main body portion 64 via a suspension fitting 65. The main body 64 is disposed at both ends of a tire suspension 66 that extends along the rail frame 55 </ b> A, and is movable on the lower surface 62 via a caster 63. The casters 63 are arranged separately in the width direction of the main body portion 64, and half of the casters 63 are accommodated in a recess provided in the lower surface 63 a of the main body portion 64 so as not to be detached, and can roll on the lower surface 62. Is done. That is, the main body portion 64 is movable along the extending direction of the rail frame 55A by the casters 63 interposed between the rail frame 55A. Further, the connecting portions of the rail frames 55A to 55C and the rail frames 57A and 57B are connected so that the ends of the opening 62a are continuously connected. For example, in a state where the entire area of the slider 52 is taken into the rail frame 55A, the casters 63 of the main body 64 located at both ends of the tire suspension 66 can roll on the opening 62a of the rail frames 57A and 57B. Thus, the slider 52 can move along the extending direction of the rail frames 57A and 57B. The movement of the sliders 52; 54; 56 is automatically controlled by a transmission mechanism such as a gear, a belt, or a rack that uses a motor driven in accordance with a control signal from the central control means 70 as a drive source.

  The tire suspension 66 is a hollow body having a substantially rectangular cross section that extends along the rail frame 55A. The length of the tire suspension 66 is set to be substantially the same as the distance between the rail frames 57A and 57B. An opening 67a is formed in the lower surface 67 of the tire suspension 66 along the extending direction. The hanging tool 51 projects downward from the opening 67a. The hanging tool 51 is arranged with a predetermined interval along the extending direction of the tire hanging portion 66. The suspension 51 protrudes downward through the opening 67a from the circumferential surface of the roller 68 that is rotatable in the tire suspension 66, and holds the annular tire T; T ′ accommodated in the envelope 5. . The roller 68 rotates about a rotation shaft extending on both side surfaces of the tire suspension 66 and alleviates the impact transmitted to the tire T; T ′ by the movement of the slider 52.

  As described above, the sliders 52; 54; 56 are freely movable in the tire molding chamber 2, the preheating chamber 20, the vulcanizing can 30, and the frame unit 58 extending over the next process. The tire T; T ′ is transported to each facility by the simple transport mechanism 50, so that the molding process in the tire molding chamber 2, the preheating process in the preheating chamber 20, the vulcanization process in the vulcanizing can 30, and the next process are performed. It is possible to regularly repeat a series of manufacturing cycles over the conveying process.

1 Manufacturing equipment, 2 Tire molding room, 5 Envelope, 20 Preheating chamber,
30 vulcanized can, 42 can side supply pipe, 44 can side discharge pipe, 46 tire side supply pipe,
48 tire side discharge pipe, 50 transport mechanism, 58 frame unit,
T; T ′ tire, Tb tire.

Claims (4)

A tire having a base tire and a tread rubber integrated with an unvulcanized cushion rubber on the outer peripheral surface of the base tire is accommodated in a container that can be accommodated in a reduced pressure state, and reserved in a preheating chamber. A preheating step for heating;
A vulcanization step of vulcanizing the preheated tire into a vulcanization can;
A tire manufacturing method comprising:
In the preheating step, the tire is preheated by the vulcanized can in advance, and the tire is preheated by using exhaust heat discharged from the vulcanized can as a heat source,
In the vulcanization step, the tire is heated by supplying air in the preheating chamber heated in the preheating step into the container .   2. The tire manufacturing method according to claim 1, wherein in the vulcanization step, the air in the preheating chamber heated in the preheating step is supplied into the vulcanization can. 3. A preheating chamber for accommodating a tire having a tread rubber which is housed in a container in a reduced pressure state and is integrated via an unvulcanized cushion rubber on an outer peripheral surface of the base tire ;
A vulcanizing can for vulcanizing the tire preheated in the preheating chamber;
A tire side supply / exhaust pipe communicating with the inside of the preheating chamber and the inside of the container of the tire accommodated in the vulcanization can;
A tire manufacturing facility comprising:
The preheating chamber preheats the tire accommodated in the container, the tire vulcanized in advance in the vulcanization can, and the exhaust heat discharged from the vulcanization can as a heat source,
A tire manufacturing facility, wherein air in the preheating chamber is supplied into the container through the tire side supply / discharge pipe during vulcanization by the vulcanization can. A supply / exhaust pipe for communicating the inside of the preheating chamber and the inside of the vulcanizing can,
The supply / exhaust pipe supplies the air in the vulcanization can into the preheating chamber after the vulcanization by the vulcanization can is completed, and the air in the preheating chamber is supplied into the vulcanization can at the start of vulcanization. The tire manufacturing facility according to claim 3 , wherein the tire manufacturing facility is supplied.

Images