JPH0444735A - Molding method of mat utilizing used tire - Google Patents

Abstract

PURPOSE:To prevent the warping deformation of a mat by means of effective molding by preventing the warping of strips in the molding frame of a base board by a spacer, temporarily adhering a rubber sheet to the back surfaces with an adhesive, taking out them from the molding frame, removing the spacer, and then conducting curing or heating pressure adhesion. CONSTITUTION:In the process for arranging stripes 1 in a molding frame 3 on a base board 2, a spacer 4 having a width of about 3 mm is inserted in a position easy to warp (about 30mm of 3-4 lines from an end), and a rubber sheet 6 is temporarily adhered to the back surface of the strips 1 with an adhesive 11 and hardened. Then, an upper cap 5 is put, and the frame 3 is reversed, the spacer is removed before curing or heating pressure adhesion, and in the state where a gap 12 corresponding to the spacer 4 width is formed between the stripes 1, curing or heating pressure adhesion is performed. Thus, the gap 12 is formed in a position easy to warp, the warp by the stripes 1 after molding is absorbed by the gap 12, and warping (deformation) of a mat 7 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of forming a cloak using used tires.

(Prior art) Conventionally, the sidewall and bead portions of a used tire are removed, cut laterally and rolled out into a rectangular plate shape, and the rubber layer including the trend portions on the front and back surfaces is cut and removed. The carcass part containing the canvas is longitudinally cut into strips or ribbons of any width, and the required number of pieces are used as a cloak material and glued in parallel on a rubber sheet using a strong adhesive. Mats that are integrated by heating and pressurizing to increase the adhesive strength of the adhesive are known (for example, Japanese Patent Application Laid-Open No. 2239/1999).
(See Japanese Utility Model Publication No. 28 and Utility Model Publication No. 55-1236).

(Problem to be Solved by the Invention) By the way, since the thin pieces that are the material for the above-mentioned cloak are the curved carcass part of a tire, the warpage remains even after cutting, which makes the molding work troublesome, and the thin pieces are The warping of the fragments causes deformation (mainly warping) in the cloak after molding,
There were problems such as inhibiting dimensional stability and deteriorating quality.

The present invention was made in view of the above-mentioned circumstances, and
The object thereof is to provide a method for forming a mat using used tires, in which the forming operation is easy and efficient, and deformation such as warping of the mat does not occur after forming.

(Means for Solving the Problems) In the present invention, the following technical measures were taken in order to achieve the above object.

That is, the present invention is a method for forming a muff door by gluing a thin piece 1 containing canvas 8 of a used tire onto a rubber sheet 6, the thin piece 1 being attached to a base plate 2.
The thin pieces 1 are arranged in the rectangular molding frame 3 placed on top, and are located at least at a position where warpage is likely to occur at a predetermined distance from the end.
A strip-shaped spacer 4 is inserted between them, and after completing the arrangement of the pieces in the molding frame 3, the molding frame 3 is turned over and a rubber sheet 6 is temporarily attached to the back side 1a of each piece 1 with adhesive 11. After bonding, the thin pieces 1 to which the rubber sheet 6 has been temporarily bonded are taken out from the molding frame 3, and after the spacer 4 is removed, vulcanization or heat-pressure bonding is performed.

(Function) According to the present invention, at the stage of arranging the thin pieces 1 in the forming frame 3, the positions where warping is likely to occur (approximately 3 to 4 rows from the end)
A spacer 4 having a width of about 3 squares is inserted at a position of about 0 cranes, and a rubber sheet 6 is temporarily adhered to the back surface 1a of the thin piece 1 with an adhesive 11 and solidified.

Then, the spacer 4 is removed before vulcanization or heat-pressure bonding, and vulcanization or heat-pressure bonding is performed with a gap 12 corresponding to the width of the spacer 4 formed between the small pieces 1 to prevent warpage. Gap work 2 is formed in the area where it is likely to occur,
The warping caused by the small pieces I after molding is absorbed by the gaps 12, and warping (deformation) of the mat door is prevented.

(Example) Embodiments of the present invention will be described below based on the drawings.

In the drawings, 1 is a thin piece of mat material, 2 is a base plate, 3 is a rectangular molding frame, 4 is a spacer 5 is an upper lid, 6 is a rubber sheet, and 7 is a single mat.

The shredded pieces 1 are obtained by removing the sidewall and bead parts of the used tire, cutting it laterally and developing it into a rectangular plate shape, and then cutting and removing the rubber layer including the tread part on the front and back surfaces, and making it into canvas. The carcass part including 8 is longitudinally cut to an arbitrary width (for example, 10 mm) to form a band shape, and the surface is brushed 9.

The base plate 2 and the molding frame 3 are made of a material that does not adhere even if a rubber glue-like adhesive adheres to it and is easy to remove, such as a steel plate or an aluminum alloy plate, and the molding frame 3 is preferably assembled and disassembled. preferable.

As shown in FIG. 3, the spacer 4 is made of a strip-shaped metal member, such as an aluminum alloy or a steel plate, and has the same length and height h as the thin piece 1, and its thickness t is equal to the warpage of the thin piece 1. The size of the adhesive is sufficient (for example, 3 mm) to absorb the moisture, and even if the adhesive is attached, it will not stick and can be easily removed.

The upper M5 is a plate-shaped member made of wood, metal, synthetic resin, or the like, and is used to prevent the thin pieces 1 from falling or collapsing when the molding frame 3 is turned over.

The rubber sheet 6 has a rectangular plate shape and has a nylon cord 10 embedded therein to increase its rigidity, suppress warping of the thin pieces 1, and enhance the effect of preventing deformation of the mat unit 7.

Next, when molding the cloak unit 7, first, the base plate 2 is placed on a workbench (not shown), and the molding frame 3 is assembled and placed on the base plate 2. And, as shown in Figures 1 and 2,
When three strips 1 are lined up from one end of the forming frame 3,
Insert spacer 4, then insert strip l into spacer 4
, and sequentially insert them into the molding frame 3 and arrange them. moreover,
Spacer 4 between 3 pieces of wood from the other end and 1 piece of 4th grain
are inserted and arranged in parallel to the state shown in FIG. As a result of various tests, the insertion position of the spacer 4 was found to be 1.
In the case of 0n fragment 1, the optimum position was 30 m from the end. However, this spacer 4 may also be inserted between the spacers 4 at both ends.

As mentioned above, when the thin pieces 1 are arranged in the molding frame 3,
As shown in FIG. 5, place the upper lid 5 on the molding frame 3, and
After the molding frame 3 and the upper lid 5 are temporarily fixed together, they are inverted and placed so that the upper lid 5 is in contact with the workbench. Next, the temporary fixation of the base plate 2, molding frame 3, etc. is released, the base plate 2 is removed from the molding frame 3 (as shown in FIG. 6), and a vulcanized adhesive (for example, rubber glue) is applied to the back surface 1a of each small piece 1. 11, and then place the rubber sheet 6 and temporarily adhere it (see Fig. 7). and,
The molding frame 3, upper lid 5, etc. are turned over again, and as shown in FIG. 8, the upper lid 5 is removed and the molding frame 3 is disassembled and removed.
The state shown in FIG. 9 is established. Therefore, before vulcanizing the thin pieces 1 temporarily adhered to the rubber sheet 6, the spacers 4 are removed from between the thin pieces 1, and the spacers 4 are brought into the state shown in FIGS. Insert the strip 1 and rubber sheet 6
Perform vulcanization adhesion. In this way, the molding operation of the single cloak 7 is completed, and a gap 12 of 311 m is formed between the thin pieces 1 at both ends, and the upper part of this gap 12 is hidden by the nap 9 and cannot be seen from above.

The warpage of the small pieces 1 is absorbed by the gap 12, and no warpage occurs in the mat body 7.

By gluing strip-shaped steps around the four circumferences of the single mat 7, it is possible to make a small mat, for example, a mat for an entrance. However, when producing a large mat as shown in Fig. 12, it is possible to make a mat as shown in Fig. 13. As illustrated, on a backing sheet (such as a rubber sheet) 13, the thin pieces 1 are arranged so that adjacent pieces are not in the same direction, and are adhered with an adhesive to form a checkered pattern. What is necessary is to extend the four circumferences of the back sheet 13 and adhere a band-shaped step 14. In addition, there are drainage holes 1 in the four corners of step 14, etc.
5 (or grooves) to allow water collected on the mat to drain away.

In the above-mentioned embodiment of the present invention, vulcanization adhesive means is adopted for adhering the small pieces 1 and the rubber sheet 4, but it is also possible to use other strong adhesives for adhesion under heat and pressure. In some cases, before vulcanizing the single mat 7, a Ka sheet (
It is possible to vulcanize and bond the entire body at once after pasting the rubber sheet) and pasting the steps, and is not limited to the above embodiment.

(Effects of the Invention) As described above, the present invention provides a canvas 8 of a used tire.
This is a method of forming a pine door by gluing small pieces 1 containing 1 on a rubber sheet 6, in which the small pieces 1 are arranged in a rectangular molding frame 3 placed on a base plate 2. However, a strip-shaped spacer 4 is inserted between the thin pieces 1 at least at a predetermined distance from the end at a position where warpage is likely to occur, and after completing the arrangement of the thin pieces 1 in the forming frame 3, the forming frame 3 is After inverting and temporarily adhering a rubber sheet 6 to the back surface 1a of each of the strips 1 with adhesive 11, the strips 1 to which the rubber sheet 6 was temporarily attached are taken out from the molding frame 3, and after removing the spacer 4, Since it is characterized by vulcanization or heat-pressure adhesion, the molding operation can be carried out extremely easily and efficiently, and even after molding, the warping of the thin pieces 1 is prevented by the gap 12 where the spacer 4 has been removed. It is possible to prevent deformation due to warping of the cloak, thereby improving dimensional stability and quality.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view during molding, Fig. 2 is a plan view of the same part, Fig. 3 is a perspective view of a spacer, and Figs. 4 to 10 are a single mat. 11 is a plan view of a single cloak, FIG. 12 is a perspective view showing another example of the mat, and FIG. 13 is an enlarged sectional view of the main part of FIG. 12. 1-Fragment, 1a-Back side, 2-Base, 3-Forming frame, 4-
Spacer, 6-・Rubber sheet, 7-Mat, 8-゛°
Canvas, 11-Adhesive. Patent applicant Otsu Tire Co., Ltd. Figure 1 Figure 3

Claims (1)

[Claims] (1) A method of forming a mat (7) by gluing a thin piece (1) containing a used tire canvas (8) onto a rubber sheet (6), the method comprising: ) are arranged in a rectangular molding frame (3) placed on a base plate (2), and at least a strip is placed between the strips (1) at a position where warping is likely to occur at a predetermined distance from the end. After inserting a shaped spacer (4) and completing the arrangement of the thin pieces (1) in the molding frame (3), turn the molding frame (3) over and glue it to the back side (1a) of each thin piece (1). After temporarily adhering the rubber sheet (6) with the agent (11), take out the small piece (1) to which the rubber sheet (6) was temporarily adhered from the molding frame (3), and after removing the spacer (4), A method for forming a mat using used tires, characterized by vulcanization or heat-pressure adhesion.