JP4925394B2 - Deformation method of old tire - Google Patents

Description

  The present invention is an old tire deformation process that can produce various structural materials utilizing a tough tire structure by transforming a waste tire (hereinafter referred to as an old tire) into a form suitable for the purpose of use. Regarding the method.

  Conventionally, it is known that diverted use of old tires as a structural material for slope work, retaining wall construction or fishing reefs in the sea. In addition, old tires are also used for playground equipment in parks, planting baskets, car stops, ship defenses, and the like.

On the other hand, more than 50% of old tires in Japan, which is said to be 100 million per year, are incinerated by chopping (cement, paper, steel, etc.). There is also. In addition, although the mechanical cutting with a cutter etc. is common for the shredding of an old tire, utilizing the chemical cutting | disconnection of the rubber molecule by ozone is also proposed (for example, patent document 1).
JP 2002-173551 A

  In the first place, a tire is a circular rotating body that rolls on the ground, and as a tough structure that can withstand load, impact, and wear, it has a unique cross-sectional shape that suppresses rotational resistance as much as possible. It is unreasonable to use for the purpose of, and the role as a functional body is not fulfilled sufficiently, and the image of the waste product is strong and unsightly in appearance. Further, even if mechanically and chemically chopping is performed, the processing efficiency is low and the processing cost tends to be excessive.

  Here, the object of the present invention is to improve the outer shape while utilizing the tire structure of a tough old tire to solve the above-mentioned problems. An object of the present invention is to provide a method for deforming old tires that can be used as various structural materials.

  In order to achieve this object, the structure of the present invention is to apply force in the radial direction from the outside of the old tire through the mold, and to force elastically deform from the inside by applying force from the inside. The gist of the invention is to keep the tire at a predetermined temperature to heat and soften the old tire and to cool to normal temperature to plastically deform the old tire.

  A force can be applied in the radial direction of the old tire and a force can be applied uniformly in the axial direction, and the old tire can be further deformed while being maintained at a predetermined temperature.

  According to the configuration of the invention, the old tires in a certain range having different tire sizes, degrees of wear, etc. are forcibly elastically deformed into a predetermined shape dimension by applying a force in the radial direction from the outside through a mold, for example, It is deformed to the same standard through a heating and cooling process at a predetermined temperature and time. The elastic deformation of the old tire can be selected from both the case where the die is pressed while heating the old tire with a directly heated die or the like, and the case where the die is pressed and mounted at room temperature, If the mold is pressed and attached, the work becomes easy by heat softening of the old tire. The cooling may be performed by naturally cooling the heated old tire to room temperature in the mold, or by forced cooling to at least a temperature at which the deformed shape can be maintained, for example, 100 to 150 ° C. or less. It may be naturally cooled.

  As the mold, for example, an outer mold and an inner mold can be combined, a force can be applied from the outside of the old tire by the outer mold, and a force can be applied from the inside by the inner mold. However, the mold is mounted while pressing against the inside and outside of different old tires with different tire sizes selected from a certain range, and the dimension is a minimum margin space that absorbs differences in the size, structure and wear degree of old tires As a setting, a device provided with means such as a spring support of the mold surface is preferable. Even if there is a slight difference in the shape and dimensions of the deformed product due to the variation of the old tires due to the margin space of the mold, etc., there is no problem even in collective use as long as the standard is within an allowable error.

  At the processing site, sorting a certain range of old tires (size, degree of damage, etc.), cleaning (high pressure water, high pressure steam, etc.), heat drying (high pressure hot air, etc.), mold mounting, heating, cooling, mold release It goes through a series of work processes, etc., and the cost is reduced by making the equipment line. The force applied to the old tire, and the temperature and time for maintaining it at a high temperature vary depending on factors such as the size of the tire (size, mass) and the material of the tire rubber, belt, etc. The pressure, temperature and time are set and reflected in the design of various facilities such as molds and heating means.

  The high temperature for holding the elastically deformed old tire is about 150 to 250 ° C., and the holding time is about 10 to 30 minutes. The heat source will be an electric heater, hot air, steam, etc., and it will be a smooth and reliable processing facility through advanced adjustment management using temperature sensors, timers, etc.

  Here, as long as the flatness ratio ((H / W) × 100% in FIG. 10) of the old tire is approximately 65% or less, there is little overhanging of the side surface portion, and it is difficult for the inner tire to be mounted. The flatness of automobile tires is between about 30% and 100% and tends to be 50% or less in recent years, so that it is not difficult to mount the inner mold.

  If the outer periphery of the ground contact part of a perfect circular old tire is, for example, hexagonal or quadrangular, and the outer surface dimensions are aligned so that each surface of the processed surface is substantially flat by applying force evenly in the axial direction, The bead portion located on the side is the same as the top and bottom surfaces, forming a U-shaped cross section to ensure flatness, and as a frame material that can be laid quickly and easily by bringing many close together, such as road pavement and slope protection Even when piled up in a column shape, it is useful as a material, forming a stable column shape by adhering the upper and lower surfaces of the product, excellent in aesthetics, and easy to fill the packing material into the product. In addition, by changing the shape of each surface to a flat shape such as an oval shape or a prismatic shape, the image of old tires can be eliminated and used as a curb for flower beds. Can be provided. In addition, by forming a design such as a concavo-convex pattern on the surface, it is possible to improve workability, aesthetics, and versatility, and promote the collection of old tires.

  When force is applied also from the inside of the old tire, the bead portion and the side surface portion can be more surely set on the same plane, and the overall shape and cross-sectional shape of the product can be adjusted. The pressing means from the inside may be an inner mold, but a gas bag such as an air bag having a shape corresponding to the outer mold is inserted inside the old tire, and from the inside of the old tire by high-pressure gas from the outside An equal force can be applied toward the outer mold. Since the gas bag is flexible, it can be easily applied to old tires with a high flatness ratio. However, the gas bag is unnecessary by bringing the bead portion of the old tire into close contact with the outer mold, and the inside of the old tire may be directly pressurized with an inert gas such as nitrogen gas.

  In other words, the present invention fundamentally deforms the entire shape of an old tire to regenerate it into a product having excellent workability, durability, stability, economy, aesthetics, etc. and versatility for various uses. This makes it possible to save labor in collecting and sorting used tires. In addition, the recovery of used tires due to the expansion of demand also serves as an environmental measure, which also makes effective use of resources.

  The old tire is elastically deformed and kept at a high temperature of a predetermined temperature, so that a good plastic deformation shape is formed due to the heat softening of rubber and the property of shrinkage due to the heat of rubber. The creation of deformed products that can be used as they are, and a range of old tires with different tire sizes, which are improved products of a certain standard, can be used widely.

  Hereinafter, a deformation method of an old tire according to an embodiment of the present invention will be described with reference to the drawings. 1 to 8 are examples of the structure and usage state of a mold used when deforming the regular circular old tire 1 shown in FIG. 10 into a hexagonal rubber frame 15 shown in FIG. In the drawings, the same reference numerals are assigned to portions having the same configuration purpose, and description thereof is omitted.

  1 is a plan view, a front view and a side view of the inner mold F, FIG. 2 is a plan view, a front view and a side view of the inner mold G used integrally with the inner mold F, and FIG. FIG. 4 is a plan view when the inner mold F and the inner mold G are mounted inside the old tire 1 and the outer mold R is mounted outside, FIG. 5 (A). , (B) are a plan view and a front view of the outer molds Q (a) and Q (b) used integrally with the outer mold R, respectively, and FIGS. 6 (A) and 6 (B) are mold fastening bodies, respectively. 7 is a perspective view of TB (a) and TB (b), FIG. 7 is an enlarged sectional view of U (a) -U (a) in FIG. 6 (A), and FIG. 8 is U (b) in FIG. 6 (B). -U (b) It is an expanded sectional view.

  The inner die F shown in FIG. 1 is formed of a fixed body F1 and a moving body F2 in a triangular shape that becomes one top when the old tire 1 is deformed into a hexagonal shape. The fixed body F1 is provided with a fixed plate F11 on the top and bottom, and a channel-shaped guide member F13 is fixed outwardly on the inner surface of the fixed plate F11 which is a smooth surface portion with an inner mold G to be described later. It consists of F15 etc.

  On the surface side of each fixing plate F11, a drop groove F111 of the bead portion B of the old tire 1 and a pressing port F112 and an extension F12 for the spring telescopic bead portion B are provided, and each guide member F13 has a guide recess F131. A plurality of fixed claw stops F132 for slidingly fixing the inner die G, which will be described later, a pressing bar F14 which is horizontally pressed while supporting the moving body F2, a compression spring, and a pressing shaft F14 (which has the same contents as G14 which will be described later). For example).

  The moving body F2 is configured by combining a vertical pressing plate F22 bent at 120 ° and upper and lower pressing plates F21 of the pressing plate F22. Each pressing plate F21 is provided with a pressing shaft F23 composed of a pressing bar and a compression spring (the same contents as G23 described later will be described in G23), and the pressing plate F22 can be pressed in the horizontal direction by the pressing shaft F14 of the fixed body F1. The guide recess F221 is formed so as to extend the guide recess F131.

  The inner mold G shown in FIG. 2 used integrally with the inner mold F is composed of a fixed body G1 and a movable body G2 in the shape of a square quadrilateral that is the top of two when the old tire 1 is deformed into a hexagonal shape. The fixed body G1 is provided with a fixed plate G11 on the top and bottom, and a guide member G13 which is a smooth surface with the inner mold F is fixed to the inner side of the front surface of each fixed plate G11, and each member and the structural materials G15, G16 ( 7) and the like.

  On the surface side of each fixing plate G11, a drop groove G111 of the bead portion B, a pressing port G112, and an extension G12 (FIGS. 2 and 7) for the spring extendable bead portion B are provided. The side surface portion is provided with a guiding convex portion G131, a sliding elastic fixed claw G132 which is slidably fixed to the inner mold F, and a pressing shaft G14 which is horizontally pressed while supporting the moving body G2. The pressing shaft G14 comprises a pressing bar G141, a compression spring G142, and a stopper lid G143 screwed to the structural material G25 shown in FIG. 7, and a shaft hole G144 consisting of a bar hole and a spring hole provided in the guiding member G13 and the structural material G16. It becomes a spring telescopic pressing body (shaft).

  The drop grooves F111 and G111 are fixed to be approximately the same as the thickness of the bead portion B for each rim diameter and flatness of the old tire 1, but the drop grooves F111 and G111 can be spring extended and contracted in the vertical direction. With the structure, the applicable size range of the old tire 1 to be deformed is widened.

  The moving body G2 includes a vertical pressing plate G22 bent in a trapezoidal shape and upper and lower pressing plates G21 of the pressing plate G22, and is constituted by each member, a structural material G25, and the like. A guide member G24 having a guide projection G241 having the same form as the guide projection G131 of the guide member G13 is provided on the side surface of the pressing plate G22. The pressing shaft G23 includes a pressing bar G231 screwed to the pressing plate G21 and an intermediate compression spring G232 in a shaft hole G251 provided in the structural member G25 shown in FIG.

  The inner mold is used by combining each pair of inner molds F, F, G, G (FIG. 4). There are gaps at the boundaries of the fixing plates F11, G11, the pressing plates F21, F22, G21, G22, etc. that press the old tire 1 from the inside, and the escape place for the softened tire rubber during the heat deformation processing of the old tire 1 However, if necessary, a round hole serving as a refuge may be provided on the pressing surface such as the pressing plates F21, F22, G21, and G22.

  As shown in FIG. 4, each pair of inner mold F and inner mold G is inserted into the old tire 1 with the inner molds F and F at a right angle with a predetermined expansion force by a hydraulic cylinder or the like. Two extension hands in one direction of an extension device each having two extension hands in two directions are inserted into the pressing holes F112 of the two inner molds F and F, and the fixing claws G132 of the inner mold G are inserted. The interval between the inner molds F and F is expanded until it does not hinder.

  Subsequently, the inner molds G and G are inserted into the old tire 1 and the inner mold G is aligned with the guide recesses F131 of the inner mold F so that the extension hand is loosened. The mold G is in a state of sliding with the inner mold F fitted. Therefore, by inserting the two extension hands remaining in the respective press openings G112 of the inner dies G and G, the fixing claw G132 is moved to a predetermined position of the fixed claw stop F132 in a plurality of stages (different depending on a certain range of old tires). When the distance between the molds G and G is expanded, the fixed claw G132 is engaged with the fixed claw stop F132, and the press fitting of the inner mold is completed. At this time, the inner mold G can be easily expanded by holding the inner mold F in a slightly expanded state with the extension hand used first. The extended hand can also be used when dismantling the mold.

  When the inner mold is pressed and mounted, the bead portion B is expanded and deformed into a hexagonal shape as shown by the inner circumference TIL shown in FIG. This reduces the stress in the tire and prevents the old tire 1 from being damaged. At this time, the bead portion B substantially coincides with the recessed grooves F111 and G111 of the inner mold, but the processing surface on which the bead portion B is located becomes flat by the pressing of the outer mold Q (a) shown in FIG. The extensions F12 and G12 are made to be spring extendable so as not to obstruct the pressing of the outer mold Q (a).

  Further, the pressing shafts F14 and G14 provided on the fixed bodies F1 and G1 perform horizontal pressing by the pressing plates F22 and G22, and the pressing shafts F23 and G23 provided on the moving bodies F2 and G2 perform vertical pressing by the pressing plates F21 and G21. Thus, when the old tire 1 is softened during heating described later, the finish of the processed surface is improved in accordance with the progress of partial deformation due to the pressing effect on the outer mold. That is, the inner molds F and G force the old tire 1 to be elastically deformed by applying a force from the inside of the old tire 1, and further deform the old tire 1 when the old tire 1 is held at a high temperature. The inner mold plays a role of deforming the old tire 1 in accordance with the shape of the outer mold. However, since the old tire 1 is a vulcanized rubber, it has a small round shape at the corner corner and a processing rod. There is almost no influence on the product due to partial derivation, and the small round shape is a preferable form.

  The outer mold includes an outer mold R shown in FIG. 3 that horizontally presses the ground contact portion T of the old tire 1 in the radial direction from the outside, and an outer mold shown in FIG. 5 that uniformly presses both side surface portions S from the outside in the axial direction. Q (a). The outer die R is provided with a joining plate R2 corresponding to the pressing plate R1 at the upper end and the lower end of the pressing plate R1 bent into a wing shape that presses two side surfaces when the old tire 1 is deformed into a hexagonal shape. In this structure, the structural materials R31 and R32 are fixed. The joint R11 of the pressing plate R1 is provided with a fixing hole R12 for fastening the joint R11 to each other, and each joining plate R2 is provided with a fixing hole R22 for press-fitting the outer mold Q (a). . Three outer molds R form one set, and form six sides 15sp of the hexagonal rubber frame 15.

  As shown in FIG. 4, the outer die R is pressed and attached using a pressing device having a predetermined pressing force such as a hydraulic cylinder that presses radially from the three directions of the corner apex R21 of the outer die R to the center. By simultaneously pressing the three bodies and fastening the mold clamping bolt bt through the fixing hole R12, the operation becomes easy and quick.

  The outer mold Q (a) in FIG. 5 that uniformly presses the old tire 1 with the inner mold press-fitted in the axial direction from the outside is a structural material that reinforces the press plate Q1 against the hexagonal press plate Q1. This is a structure for fixing Q2 and Q3. The pressing plate Q1 is provided with a fixing hole Q11 corresponding to the fixing hole R22 of the outer mold R. The outer mold Q (a) is a pair of upper and lower pairs, and forms an upper surface 15up and a bottom surface 15Lp of the rubber frame 15. In addition, it is good to apply | coat the lubricant which improves sliding with the surface of the old tire 1, and makes the outer metal mold | die press-fit easy on each process surface side of the outer metal molds R and Q (a).

  The outer mold is mounted and fixed on the outer mold Q (a) installed at the prescribed position of the brake-equipped turntable by pressing and mounting the inner mold as shown in FIG. 1 is installed, three outer molds R are arranged in accordance with the outer circumferential line TOL, another outer mold Q (a) is installed at a specified position on the upper surface of the old tire 1, and the outer mold Q (a ) From above the vertical pressing by a pressing device such as a hydraulic cylinder and the horizontal pressing from the corner apex R21 of the outer mold R are slowly alternated and the clamping bolt bt is fixed to the fixing hole R12 and the fixing holes R22, Q11 at the end. As a result, a die fastening body TB (a) in which the inner die and the outer die are pressed and attached to the old tire 1 is formed (FIG. 6). At this time, the old tire 1 in the mold fastening body TB (a) is forcibly elastically deformed into a predetermined shape by the outer mold and the inner mold, and an example of the form is shown in FIG.

  A spring washer or the like is used when the clamping bolt bt is fastened to the fixing holes R12, R22, Q11. However, depending on the fastening state of the molds, some deformation occurs when the old tire 1 is heated and softened together with the compression spring. At the same time, the molds are brought into close contact with each other. For such a situation, it is preferable to make the fixing holes R22 and Q11 sufficiently large. That is, the old tire 1 may be further deformed while being kept at a high temperature. Note that a narrow fastener made of a predetermined elastic body may be used in place of the mold clamping bolt bt at the end of pressing, or simply a mold clamping bolt bt provided with a compression spring or the like without using a pressing device or the like. It is also possible to perform pressure mounting only by using the above.

  When the mold fastening body TB (a) with the mold pressed onto the old tire 1 is cooled by holding it at a high temperature for a predetermined time with a heating facility, and the mold is removed, the old tire 1 is 9 is transformed into a hexagonal shape as shown in FIG. 9, and the upper surface 15up, the bottom surface 15Lp, and the side surface 15sp are deformed and processed into a substantially flat rubber frame 15. Can be processed into products of the same standard.

  The heating equipment may be an electric heater, steam, hot air, etc. as a heat source, and it may be a heating chamber of a scale that can accommodate multiple mold fastening bodies TB (a) at the same time. The heating chamber and cooling chamber are connected by a conveyor etc. In order to eliminate unevenness, the working effect may be enhanced by moving and cooling the mold fastening body TB (a) and cooling it. Since the mold fastening body TB (a) surrounds the old tire 1 with the outer mold, the old tire 1 is not in direct contact with the heat source. Further, the mold may be directly heated with an electric heater or the like.

  The old tires 1 can standardize the product height and the like within a certain range of tire sizes within an allowable error, and it is easy to lay and use many tires collectively. Therefore, the deformed product of the rubber frame 15 can be provided for a wide range of uses such as public works such as civil engineering, architecture, landscaping, and private use.

  In addition, a rubber handle or handle can be formed on at least the surface of the product. For example, a rubber handle is an old tire that has been pre-treated, such as sanding unprepared unvulcanized rubber, unvulcanized rubber integrated with a reinforcing net, or kneaded uncured rubber by spatula pulling, etc. It may be attached to the surface of 1 and vulcanized simultaneously with heating, or may be retrofitted to a deformed product and separately vulcanized by heating. In addition, it is possible to improve the aesthetics by forming uneven patterns or letters on the surface of the product.

Other embodiments

  As the mold for storing the old tire 1, the outer mold R shown in FIG. 3 and the outer molds Q (a) and Q (b) shown in FIG. b) can be formed as The outer molds Q (a) and Q (b) are used as the lower surface and the upper surface of the mold fastening body TB (b), respectively. FIG. 8 is an enlarged cross-sectional view of U (b) -U (b) in FIG.

  The mold fastening body TB (b) includes a gas feeding valve Q4 at the center (wheel rim part) of the outer mold Q (b) on the upper surface. In order to apply a force from the inside of the old tire 1 to the valve Q4, a gas bag AB having a shape corresponding to the outer mold is connected.

  The old tire 1 and the outer mold R are arranged at the specified position of the outer mold Q (a), the gas bag AB is inserted inside the old tire 1, the outer mold Q (b) is installed, and the valve Q4 The high pressure gas is introduced into the gas bag AB through the gas and pressurized so that the outer mold Q (b) slightly floats. Subsequently, the old tires were subjected to slow alternating alternating vertical pressing from the upper side of the outer die Q (b), horizontal pressing simultaneously from three directions of the corner apex R21 of the outer die R, and gas pressurization by the gas bag AB. 1 is forcibly elastically deformed, and the mold clamping bolt bt is fastened through the fixing holes R12, R22, Q11 to form the mold fastening body TB (b), and the mold clamping is completed. The mold fastening body TB (b) is cooled while being held at a predetermined high temperature, and the mold is removed to be plastically deformed into a product corresponding to the rubber frame 15. Since it is gas pressurization by the gas bag AB, deformation progress by heat softening of the rubber can be achieved while keeping the temperature high.

  The air bag AB is made of an airtight and high temperature resistant flexible material. The wheel rim portion of the old tire 1 and the mounting portion of the valve Q4 are reinforced as necessary, and the outer mold Q (a ), Q (b), the outer mold R, and the like are also structured in accordance with the degree of pressurization of the gas bag AB. The outer mold Q (b) to which the valve Q4 is attached may be arranged on either the upper surface or the lower surface of the mold fastening body TB (b), and can be selected according to the convenience of equipment and work.

  According to the air bag AB, since it is not necessary to use an inner mold, even if the corner portion of the deformed product lacks sharpness, it can be easily attached to the inside of the old tire 1. Further, the old tire 1 can be evenly pressed and deformed against the outer mold by gas pressurization, which is particularly effective when the old tire 1 is relatively loosely deformed or has a high flatness. Note that the sharpness of the corners of the product can be improved if the pressure of the outer mold is sufficiently increased by using gas pressurization at an ultrahigh pressure.

  Further, by improving the airtightness between the outer dies Q (a) and Q (b) and the bead portion B of the old tire 1, a simple inner die and nitrogen or the like can be used without using the gas bag AB. Deformation processing is also possible by using the active gas in combination with direct pressurization.

  The old tire 1 can be deformed by being elastically deformed and plastically deformed in a chamber 21 that can maintain a predetermined high-temperature atmosphere (FIG. 11). However, FIGS. 11A and 11B are a transverse sectional view and a longitudinal sectional view of the chamber 21, respectively.

  In the chamber 21, a ring disposed on the base 23 via a support frame 22 and a base 23 via a pair of left and right outer molds 24a, 24a, 24b, 24b, an upper outer mold 25, and an adapter 26a. A gas bag 26 is incorporated. The outer dies 24a and 24a move forward through the hydraulically driven rams 24c and 24c until they are in close contact with each other, and the old tire 1 on the base 23 is sandwiched and forcibly elastically deformed. Further, the outer dies 24b and 24b assembled to the outer dies 24a and 24a move forward through the hydraulically driven rams 24d and 24d, and are elastically deformed by applying a force in the radial direction from the outside of the old tire 1. The outer mold 25 is driven downward through the ram 25 a and applies a force uniformly in the axial direction of the old tire 1 on the base 23. Furthermore, the gas bag 26 applies force from the inside of the old tire 1 by introducing high-pressure gas from the outside through the valve 26b and the adapter 26a.

  Therefore, the old tire 1 is elastically deformed through the outer dies 24a, 24a, 24b, 24b, 25 and the gas bag 26, and is plastically deformed into a predetermined shape by being kept at a high temperature in the chamber 21 as it is. It can be deformed. In addition, each outer metal mold | die 24a, 24b of FIG. 11 has illustrated the case where the old tire 1 is deform | transformed into an ellipse.

  The old tire 1 can be deformed into various forms other than a hexagonal shape and an elliptical shape (FIG. 12). For example, pentagon (Fig. (A)), octagon (Fig. (B)), square (Fig. (C)), rectangle (Fig. (D)), triangle (Fig. (E)), reduction These are a rounded circular shape (FIG. (F)), an oval shape (FIG. (G)) that does not leave a space inside, a similar rectangle (FIG. (H)), and the like. Each form may not be a regular polygon. FIGS. 12A to 12H are schematic plan views of products that have been subjected to deformation processing. In addition, as shown in FIGS. 12G and 12H, when no space is left inside, the inner mold cannot be used. Therefore, in order to apply force from the inside of the old tire 1, a disposable gas is used. It is preferable to directly pressurize the inside of the old tire 1 without using a bag or using a gas bag.

  The deformation processing method for used tires according to the present invention makes use of the tough tire structure of the used tire 1 to produce a product of the same standard by deforming the shape, thereby providing high durability, workability and economic efficiency. Can be regenerated into various products with aesthetics, for public facilities such as parks, plazas, roads, rivers, and harbors, and for private use such as gardens, residential land, farmland, factory land, and architecture. It can be suitably used in the field.

Configuration explanatory diagram of inner mold F Configuration explanatory diagram of inner mold G Configuration illustration of outer mold R Use state plan view of inner mold F, G, outer mold R Configuration diagram of outer molds Q (a) and Q (b) Perspective view of mold fastening body TB (a), TB (b) U (a) -U (a) enlarged sectional view of FIG. U (b) -U (b) enlarged sectional view of FIG. 6 (B) Product configuration illustration Configuration explanatory diagram of old tire 1 Conceptual explanatory diagram showing another embodiment Product schematic plan view

Explanation of symbols

F, G: Inner mold R, Q (a), Q (b), 24a, 24b, 25 ... Outer mold TB (a), TB (b) ... Mold fastening body AB, 26 ... Gas bag 1 ... Old tires

Patent Applicant Minoru Kitagawa
Attorney Tadaaki Matsuda, Attorney

Claims (3)

Rutotomoni apply force through the mold from the outside of the tires in the radial direction, forcibly elastically deformed by applying a force from the inside, to hold the old tires are elastically deformed to a predetermined temperature tires A method for deforming an old tire, characterized by subjecting the old tire to plastic deformation by heat softening and cooling to room temperature.   2. The method for deforming an old tire according to claim 1, wherein a force is applied in the radial direction of the old tire and a force is also applied uniformly in the axial direction. Claim 1 or claim 2 deformation method old tire, wherein the further deforming while maintaining the tires to a predetermined temperature.

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