JP2009178928A - Sheet material and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a sheet material using a code containing edge material or the like produced in a tire manufacturing process as a raw material and extremely excellent in strength such as pressure breaking resistance or the like especially against large load. <P>SOLUTION: A material sheet (2) containing codes (31) and having required thickness and a required shape is formed by heating and pressurizing the raw material (1) and the material sheet (2) is cut into a size possible to keep a sheet shape, to produce a large number of sheet pieces (3). The amount of the sheet pieces is specified so as to become the same weight as the sheet material being a predetermined molded product and the whole amount of the sheet pieces are laminated in the thickness direction of the sheet pieces so as to fill the space of a mold having a sheet material moldable space to be put in the mold. The sheet pieces put in the mold in a laminated state are heated and pressurized from the front and rear sides of the sheet pieces to bond the codes and a rubber part to mold them. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a covering material and the covering material. More particularly, the present invention relates to a method and a flooring material that uses a waste tire or a corded end material generated in a tire manufacturing process as a raw material, and that particularly manufactures a flooring material that is extremely excellent in strength such as pressure resistance against heavy loads.

  Various materials are used as a covering material (laying board) under a heavy object. For example, a wood material (including plywood) is mainly used as a covering material laid under an outrigger of a heavy machine such as a crane work vehicle. The flooring material formed of such a wood material is not only inferior in corrosion resistance, but also breaks or breaks due to the load applied to the flooring material.

  On the other hand, the generation of waste tires (including scraps generated in the tire manufacturing process) as industrial waste is said to be over 1 million tons per year even in Japan. Waste tires are also used as fuel (heat source) for boilers and the like. However, the use as such a fuel has a big problem of generating a large amount of carbon dioxide, which is a cause of global warming. Therefore, from the viewpoint of conservation of the global environment, instead of using waste tires as fuel, other useful articles (such as vibration control materials, road surface materials or playground equipment) are used in a manner that minimizes energy consumption. It is desirable to process it.

  As an article obtained by processing waste tires, for example, there is a “board material for sidewalk” described in Patent Document 1. This “sideboard slab material” is made by uniformly adding 65 vol% of cut rubber chips that do not include wires of 2 to 6 mm diameter waste tires and 35 vol% of 2 to 4 mm diameter natural zeolite grains by adding an appropriate amount of adhesive. It is obtained by mixing, further adding a small amount of a synthetic pigment, putting it in a plate mold having a depth of 15 mm and a length and width of 100 × 200 mm and molding by heating and pressing.

JP2007-31951A

  Since the above-mentioned “board material for sidewalk” does not apply a very large load for use, the necessary and sufficient strength can be obtained even if it is manufactured using the rubber part of the waste tire and the adhesive. For this reason, in the manufacture of “pedestrian pedestal materials”, materials obtained by removing various cords such as breaker cords, carcass cords and bead wires used in tires in advance are used as raw materials.

  If this "sidewalk flooring material" is used as a flooring material under the outriggers of heavy machinery as described above, it is clear that the strength is insufficient and it is overwhelmed by heavy loads, or It is easy to imagine being crushed and getting close to it. If it becomes like this, it will become impossible to maintain the function as a laying material, and when the placing surface of an outrigger is a concrete surface instead of the ground, a crack will be generated or destroyed in concrete.

  Therefore, the present inventor has conventionally used a waste tire, whose processing has been a problem, as a raw material, for example, a laying material laid under an outrigger of a heavy machine such as a crane work vehicle, and a conventional wooden laying material Compared with the above-mentioned “sheet material for sidewalk”, etc., the present invention has been completed by intensive studies and trials in order to produce a flooring material having superior strength against a heavy load.

(Object of the present invention)
It is an object of the present invention to provide a method and a floor covering which use a waste tire or a corded end material generated in a tire manufacturing process as a raw material, and manufacture a floor covering that is extremely excellent in strength such as a pressure-resisting performance against a heavy load. Objective.

  Means taken by the present invention to solve the above problems are as follows.

  The present invention heats and pressurizes waste tires used as raw materials or corded end materials produced in the tire manufacturing process to produce a material sheet having a required thickness and shape including the cord, and from the material sheet Create a large number of sheet pieces, specify the amount of the sheet pieces so that they are the same weight as the floor covering as a predetermined molded product, and the total amount of the specified sheet pieces is the thickness of the sheet piece Laminate in the direction and put it in the mold, heat and press the sheet piece stacked in the mold from the front and back direction, and bind the cord and rubber part This is a method for producing a covering material, which is formed into a plate shape.

  The present invention is made from scrap tires or corded end materials produced in the tire manufacturing process as raw materials, and the cords contained in the rubber face in various directions when viewed from the front and back sides, and the side surface on which the thickness appears. It is a flooring material that is aligned in a direction substantially parallel to the front and back surfaces when viewed from the top and overlaps in the thickness direction.

  The present invention is a plate-like laying material made from a waste tire or a cord-containing end material generated in a tire manufacturing process, and a sheet piece having a cord contained in the raw material is formed in a thickness direction in a mold. In a laminated state, the cord and the rubber portion are formed in a plate shape by pressing and heating from the front and back directions, and the cords included inside are arranged in a specific direction when viewed from the front and back sides. It is a flooring material that is aligned in a direction substantially parallel to the front and back surfaces when viewed from the side of the side where the thickness appears, and that overlaps in the thickness direction.

  The present invention is to heat and press a waste tire as a raw material or a corded end material generated in a tire manufacturing process so as to produce a material sheet having a required thickness and shape including the cord. A large number of sheet pieces are made from the sheet, the amount of the sheet piece is specified so as to be the same as the weight of the covering material as a predetermined molded product, and the amount of the sheet piece whose amount is specified is determined. The entire amount is stacked in the thickness direction of the sheet piece and placed in the mold, and the sheet piece stacked in the mold is heated and pressurized from the front and back sides of the sheet piece. This is a flooring material obtained by binding a rubber part and molding it into a plate shape.

As the waste tire as a raw material, for example, only the tread portion may be used, or the entire tire including the sidewall portion may be used. Moreover, when making a material sheet, it is preferable to make it easy to handle at the time of pressurization, such as cutting an appropriate part of a waste tire and developing it into a long length, but it is not limited to such a method, The whole waste tire can be rolled to form a material sheet.
In addition, the term “cord end material generated in the tire manufacturing process” in the claims and the specification means that the end material of the carcass part (or the rubber thereof is fused and hardened) generated in the tire manufacturing. , So-called fabric-containing recycled rubber).

  Also, the cord is a breaker cord (contained in a belt shape by knitting steel wire to increase the strength of the ground contact surface and prevent the penetration of foreign objects), carcass cord (the role of the tire skeleton) For holding the tire structure) and bead cords. Each cord includes one made of metal (mainly steel) and one made of nylon, polyester, and aromatic polyamide resin (aramid fiber: high-tensile fiber).

(Function)
The operation of the covering material according to the present invention will be described.
The inside of the sheet piece cut to a size capable of maintaining the sheet shape from the material sheet, for example, contains a lot of cords having a certain length, unlike the case of being crushed into chips. It will be. Further, the direction of the cord is substantially parallel to the direction of the front and back surfaces of the sheet piece. A large number of the sheet pieces are laminated in the thickness direction, and the laminated sheet pieces are heated and pressed from the front and back directions, so that the rubber part melts and binds, and the cord is also bonded. To wear. A large number of cords included in the flooring material (molded product) are aligned so as to face in a direction substantially parallel to the front and back surfaces of the flooring material.

  In other words, cords with a certain length are random in the direction when the sheet pieces are stacked, so if you look from the front and back sides of the flooring (not necessarily visible through the rubber part) It does not exist in a state limited to the direction of, but faces in various directions. In addition, a cord having a certain length may face in the vertical direction (front and back direction) inside the flooring, or may cross at a large angle in the same direction due to pressure applied from the front and back sides of the sheet piece during molding. Therefore, when viewed from the side where the thickness appears, they are aligned in a direction substantially parallel to the front and back surfaces, and many overlap in the thickness direction.

  Since the laying material has such a structure, it is not easily crushed or crushed even when a large load is applied from the upper surface side during use. In other words, a large force acts in the direction in which the front and back surfaces spread as the flooring material is crushed and deformed in the direction of the front and back surfaces due to the binding of a large number of cords and rubber portions facing in various directions in plan view. However, it is not easily deformed by the tensile strength of a large number of cords (made of metal or high-tensile fiber). In addition, the cords are aligned in a direction substantially parallel to the front and back surfaces of the flooring material, and a large number of cords are overlapped in the thickness direction, so that they are excellent in resistance to forces in the front and back directions due to heavy loads.

The covering material obtained by the manufacturing method according to the present invention has a cord included therein facing in various directions as viewed from the front and back sides of the covering material, and facing in a direction substantially parallel to the front and back surfaces as viewed from the side where the thickness appears. In addition, the structure is such that a large number overlap in the thickness direction.
Therefore, when a large amount of load is applied from the upper surface side during use, the tensile strength of a large number of cords is applied even if a large force acts in the direction in which the front and back surfaces spread as the flooring material is crushed in the front and back direction. It is not easily deformed, and because the cords are stacked in the thickness direction, it has excellent resistance to forces in the front and back directions, so it is not easily crushed or crushed Has strength.

  The present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is an explanatory view showing a method for producing a floor covering using a waste tire according to the present invention,
FIG. 2 is a perspective explanatory view of the sheet piece,
FIG. 3 is an explanatory diagram of the molding process,
FIG. 4 is a perspective view of a floor covering according to the present invention,
5 is a cross-sectional view taken along the line AA in FIG.

With reference to FIG. 1 thru | or FIG. 5, the manufacturing method of the flooring using the waste tire which concerns on this invention, and the flooring obtained by it are demonstrated.
In the following description, a covering material 4 laid under an outrigger such as a crane work vehicle (refer to FIG. 4, dimensions: 400 mm long × 400 mm wide × 50 mm thick, weight: 10 kg in plan view in a square shape) The case of manufacturing will be described.

(1) A raw material 1 is prepared. As the raw material 1, a block-like material (sometimes referred to as a recycled rubber with a fabric) obtained by welding and solidifying an end material of a carcass portion generated in tire manufacture and cutting it to an appropriate size is used.

(2) Rolling process The raw material 1 is rolled using a rolling roller having a pair of rollers. Each roller of the rolling roller can be heated, and the raw material 1 passing between the rollers can be rolled while being appropriately heated. The raw material 1 is rolled to form a material sheet 2 having an appropriate thickness. In this example, the heating temperature was 50 ° C. to 60 ° C., and the thickness of the material sheet 2 was about 10 mm. In addition, this heating temperature is not limited to the said temperature, It can set suitably.

(3) Cutting process Using a cutting machine (not shown), the material sheet 2 is cut into small pieces to make a sheet piece 3. Each sheet piece 3 is cut into a size capable of maintaining the sheet shape (the shape may be uniform or irregular). In the present embodiment, the size of the sheet piece 3 is about 200 mm in the maximum width (overhead length). In addition, the cut | disconnected sheet piece 3 contains many cords 31 wrapped in a rubber part (rubber component) 30 and having a certain length. The direction of the cord 31 is substantially parallel to the direction of the front and back surfaces of the sheet piece 3 (see FIG. 2). In the present embodiment, the cord 31 is made of nylon, polyester, or aramid fiber. However, when a waste tire (radial tire) is used as a raw material, the cord 31 is mixed.

(4) Weighing process The amount of the sheet piece 3 is specified using a weighing machine (not shown) so that the weight is the same as the weight of the covering material 4 as a predetermined molded product, that is, the total is 10 kg. To do.

(5) Mold Inserting Step The entire amount of the sheet piece 3 whose amount is specified is placed in the molding die 5 (see FIG. 3 (a)). The molding die 5 includes a metal bottom plate 50 and a frame member 51 assembled in a square shape in plan view and fixed to the upper surface thereof. The dimensions of each part are set so that the shape of the space 52 formed by the bottom plate 50 and the frame material 51 is the same as the shape of the covering material 4 as a predetermined molded product (a plate body having a square shape in plan view). ing. Then, a large number of the sheet pieces 3 having the above-mentioned amount are stacked by being appropriately stacked in the thickness direction while the sheet pieces 3 are laid flat so as to fill the space 52. As shown in FIG. 3A, the sheet piece 3 normally does not fit in the space 52 and slightly rises upward.

(6) Molding step A metal lid 53 is placed on the sheet piece 3 placed in the space 52 of the mold 5, and a required pressure is applied from above by the press body 54. The forming die 5 and the press body 54 can be heated, and the sheet piece 3 is formed into a plate shape while being heated. Thereby, the rubber part 30 of each sheet piece 3 is melted and bonded to each other to form a molded rubber part 40, and further strongly bonded to the cord 31. In this example, pressing was performed with specifications of a pressure of 150 t, a temperature of 150 ° C., and a time of 60 min.

  Since many cords 31 included in the molded covering material 4 are random (uneven) in the direction when the sheet pieces 3 are stacked, when viewed from the front and back sides of the covering material 4 It does not exist in a specific direction (although it does not appear to penetrate through the rubber part), it faces in various directions. Further, as described above, the cord 31 having a certain length is oriented in the vertical direction (front and back direction) in the flooring material 4 due to the pressure applied from the front and back sides of the sheet piece 3 during molding. Since they cannot cross each other at a large angle, they are aligned in a direction substantially parallel to the front and back surfaces when viewed from the side where the thickness appears, and many overlap in the thickness direction (see FIG. 6).

(7) The press by the press body 54 was released, the lid body 53 was removed, and the covering material 4 which was a molded product and was a plate having a square shape in plan view was taken out from the mold 5 (demolding). And after deburring the flooring material 4 and adjusting the shape, the handle member 41 was screwed and attached to one side where the thickness of the flooring material 4 appears (see FIG. 4). In addition, the handle member 41 can also be provided so that it may become plural in total on other side surfaces, such as an opposite side surface. Further, the handle can be formed integrally by providing a finger hole or the like at the time of molding.

(Function)
The covering material 4 manufactured by the above manufacturing method has a large number of cords 31 included inside as described above and faces in various directions when viewed from the front and back sides of the covering material 4, and is seen from the side surface where the thickness appears. For example, they are aligned in a direction substantially parallel to the front and back surfaces, and many overlap in the thickness direction.

Since the covering material 4 has such a structure, for example, when it is used as a covering material for an outrigger of a crane working vehicle and a heavy load is applied from the upper surface side, it is easily crushed or crushed. There is no.
That is, the large number of cords 31 facing in various directions in plan view and the rubber portion 40 are bound together, so that a large force is exerted in the direction in which the front and back surfaces are expanded as the covering material 4 is crushed and deformed in the front and back directions. Even if it acts, it is not easily deformed by the tensile strength of a large number of cords 31. Further, the cords 31 are aligned in a direction substantially parallel to the front and back surfaces of the flooring material 4 and are overlapped in the thickness direction, so that they have excellent resistance to forces in the front and back direction due to heavy loads. It is hard to be crushed.

  Note that the terms and expressions used in this specification are merely explanatory and are not limiting at all, and terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to exclude. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

Explanatory drawing which shows the manufacturing method of the covering material using the waste tire which concerns on this invention. The perspective explanatory view of a sheet piece. Explanatory drawing of a formation process. The perspective view of the covering material which concerns on this invention. AA sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Raw material 2 Material sheet 3 Sheet piece 30 Rubber part 31 Code 4 Laying material 40 Rubber part 41 Handle member 5 Molding die 50 Bottom plate 51 Frame material 52 Space 53 Lid 54 Press body

Claims (4)

Heat and pressurize the waste tire that is the raw material or the corded end material generated in the tire manufacturing process to produce a material sheet (2) having the required thickness and shape including the cord (31),
Making a number of sheet pieces (3) from the material sheet (2),
Specify the amount of the sheet piece (3) so that it becomes the same weight as the weight of the covering material as a predetermined molded product,
The total amount of the specified sheet piece (3) is stacked in the thickness direction of the sheet piece (3) and placed in the mold (5),
The sheet piece (3) stacked in the mold (5) is heated and pressurized from the front and back sides of the sheet piece (3), and the cord (31) and the rubber part (30) are attached. Bind to form a plate,
A method for manufacturing a covering material. Made from scrap tires or end materials with cords produced in the tire manufacturing process as raw materials,
The cord (31) contained in the rubber faces in various directions when viewed from the front and back sides, and is aligned in a direction substantially parallel to the front and back surfaces when viewed from the side where the thickness appears, and overlaps in the thickness direction. ,
Flooring. A plate-like laying material made from scrapped tires or corded end material generated in the tire manufacturing process,
The sheet piece (3) having the cord (31) contained in the raw material, the cord (31) by pressing and heating from the front and back sides in a state of being laminated in the thickness direction in the mold (5) And the rubber part (30) are formed into a plate-like shape, and the cord (31) contained therein is not arranged in a specific direction when viewed from the front and back sides, and is viewed from the side where the thickness appears. A large number of layers are aligned in the thickness direction and aligned in a direction substantially parallel to the back surface.
Flooring. Heat and pressurize waste tires that are used as raw materials or corded end materials produced in the tire manufacturing process to produce a material sheet (2) having a required thickness and shape including cords (31),
A number of sheet pieces (3) are made from the material sheet (2),
The amount of the sheet piece (3) is specified so that it becomes the same weight as the weight of the covering material as a predetermined molded product,
The total amount of the specified sheet piece (3) is laminated in the thickness direction of the sheet piece (3) so as to be put in the mold (5),
The sheet piece (3) stacked in the mold (5) is heated and pressurized from the front and back sides of the sheet piece (3), and the cord (31) and the rubber part (30) are attached. Obtained by binding and forming into a plate,
Flooring.

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