JP4975654B2 - Manufacturing method of flooring - Google Patents

Description

The present invention relates to the production how the litter. More specifically, using the cords end material produced by tire manufacturing process as a raw material, to methods and Shikizai producing very good litter to the intensity of the pressure-resistant sectional performance, etc. In particular for large 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, so it has to be frequently replaced and is uneconomical.

  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 a sidewalk” is not subjected to such a large load for use, a necessary and sufficient strength can be obtained even if it is manufactured by using a rubber part of a waste tire and an 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 uses a tire as a raw material and is a laying material laid under an outrigger of a heavy machine such as a crane work vehicle, for example, compared with a conventional wooden laying material or the above-mentioned `` walking laying sheet material '', etc. The present invention was completed by intensive studies and trials in order to produce a flooring material having excellent strength against a heavy load.

(Object of the present invention)
The present invention aims to provide a method and litter using cords scraps generated in tire manufacturing process as a raw material, to produce a very good litter to the intensity of the pressure-resistant sectional performance, etc. In particular for large loads And

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

The present invention uses cords scraps generated in the tire manufacturing process as a raw material, the length direction of the cord parallel to the front and back surfaces of the litter, and not facing in one direction only, moreover A method for producing a covering material having an overlap in the thickness direction,
Step wherein performing heat and pressure against the cords offcuts, that tell a sheet of material having a required thickness and shape containing the code,
Step from this material sheet, is cut to a size which can maintain the sheet shape, the length direction of the code, to create a plurality of sheet pieces comprising parallel cords and directions of the front and back surfaces of a sheet piece,
So that the same weight as the weight of the litter as a predetermined shaped article, identifying a quantity of the sheet piece,
Comprising a frame member which is fixed on the upper surface metal base plate, formed by the use of bottom plate and the frame mold formed by material, the total amount of the sheet piece quantity is specified, the bottom plate and the frame member step so as to fill the space, which and place in each while the sheet pieces flat cord length direction within the mold by laminating only does manner in the thickness direction suited way to be,
A metal lid is placed on the sheet piece stacked in the mold, and the sheet piece is heated and pressed from the front and back sides of the sheet piece, and the cord and the rubber part are attached. A process of binding and forming into a plate shape,
including,
This is a method for manufacturing a covering material.

The present invention is the method for producing a covering material according to claim 1, wherein the cord is made of nylon, polyester, or aromatic polyamide resin .

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  The term “cored end material generated in the tire manufacturing process” in the claims and the specification refers to the end material of the carcass part (or the rubber material fused or hardened), which is mainly generated in the tire manufacturing. Recycled rubber with fabric).

  The code is various codes such as a bead code. 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 effect | action of the covering material obtained with the manufacturing method which concerns on this invention is demonstrated.
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. 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.

1 is an explanatory view showing a manufacturing method of the litter using engagement filter unpleasant 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.

1 to the production method of the litter using engagement filter unpleasant to the present invention with reference to FIGS. 5 and about obtained thereby litter will be described.
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 this embodiment, the cord 31 is made of nylon, polyester, or aramid fiber.

(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 view showing a manufacturing method of the engaging Ru litter in the present 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.

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 (2)

Use cords scraps generated in the tire manufacturing process as a raw material, the length direction of the cord parallel to the front and back surfaces of the litter, and not facing in one direction only, yet in the thickness direction A method of manufacturing a covering material having an overlap,
Step wherein performing heat and pressure against the cords offcuts, that tell a sheet of material having a required thickness and shape containing the code,
Step from this material sheet, is cut to a size which can maintain the sheet shape, the length direction of the code, to create a plurality of sheet pieces comprising parallel cords and directions of the front and back surfaces of a sheet piece,
So that the same weight as the weight of the litter as a predetermined shaped article, identifying a quantity of the sheet piece,
Comprising a frame member which is fixed on the upper surface metal base plate, formed by the use of bottom plate and the frame mold formed by material, the total amount of the sheet piece quantity is specified, the bottom plate and the frame member step so as to fill the space, which and place in each while the sheet pieces flat cord length direction within the mold by laminating only does manner in the thickness direction suited way to be,
A metal lid is placed on the sheet piece stacked in the mold, and the sheet piece is heated and pressed from the front and back sides of the sheet piece, and the cord and the rubber part are attached. A process of binding and forming into a plate shape,
including,
A method for manufacturing a covering material. The method for producing a covering material according to claim 1, wherein the cord is made of nylon, polyester, or aromatic polyamide resin .

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