JPS6351114A - Manufacture of antiskid fitting for automobile tire - Google Patents

Abstract

PURPOSE:To make it possible to easily and surely aligne core material to groove by a method wherein the intersection points and curved points of core materials sewed in advance on a thin plate, formed of non-metallic elastic body, are hooked up to guide pins, which are protrusively provided on a press tool. CONSTITUTION:Proper number of guide pins 8... are protrusively provided at the intersection points and curved points of a groove 6 on a press bottom force C in such a manner that the tip part of each pin 8 faces in the groove 7 on a press top force D in a press operation. In addition, non-metallic elastic body 12, such as natural rubber, synthetic rubber, synthetic resin or the like, is applied in the groove 6 and, at the same time, a plate 9 is piled up on the joint surface 13 of the press bottom force C by hooking the intersection portions and curved portions of core materials 4 adhesively sewed on the plate 9 to the guide pins 8. Next, non-metallic elastic body 12 is applied along the sewing pattern of the core materials 4 so as to press-mold the plate 9 under the state being sandwiched between the non-metallic elastic bodies 12 and 12 with both the press forces C and D. Accordingly, the alignment of the core materials to grooves can be easily and surely done through the hooking action of sad core materials to the guide pins.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an anti-slip device for automobile tires that can be installed to run on snow, particularly for the purpose of preventing noise and preventing damage to road surfaces. The present invention relates to a method for manufacturing an anti-slip device formed into a mesh shape using a material as a material.

[Conventional technology]

In general, vehicles that drive on snowy roads (frozen roads) are equipped with anti-slip devices on each tire, and the anti-slip devices prevent slips and allow safe driving on snow. Various types of anti-slip devices for automobile tires have been proposed in the past.
Among these, non-metallic anti-slip devices made of elastic materials such as synthetic rubber and plastic and formed into a mesh (or tortoise-shell) shape are said to not damage the road surface and generate low noise when the car is running. It is often used because of its advantages. Conventionally, as a method for manufacturing a non-slip device formed into a mesh (or tortoiseshell) shape using a non-metallic elastic material as a material, the following methods were used: A plastic covering material (non-metallic elastic body) such as synthetic rubber is placed in the bottom of the groove, and then a string-like core material is stretched over the plastic covering material using the groove as a guide and pressed. A method in which a mesh is formed in a mold, the above-mentioned plastic coating material is filled onto the mesh, press-molded, and simultaneously vulcanized (Japanese Patent Publication No. 13337/1982).

■ A diagonal axe-shaped groove for forming a mesh is drilled on the surface of the press mold, and a string-like core material coated with a plastic coating material (non-metallic elastic body) is stretched inside the groove. A method in which a mesh is formed with
Special Publication No. 58-49366).

has been proposed ahead of time.

[Problem that the invention seeks to solve]

However, in the conventional manufacturing method as described above.

In both cases, a string-like core material or a string-like core material covering a plastic coating material is stretched around the groove, so that the string-like core material protrudes from the mesh part (pattern) due to the pressure of the press during press molding. The problem is that not only does the appearance of the product ('a stopper) deteriorate, but also the work of stretching the string-like core material etc. inside the groove is extremely troublesome. have

The present invention is an attempt to improve the above-mentioned problems, and it is easy to set the string-like core material, and the string-like core material does not protrude from the pattern during press molding. The problem that needs to be solved lies in the fact that That is, the present invention uses a non-metallic elastic material as a material to form a thin plate with a core material sewn in advance by a sewing machine, and the intersection points and curved points of the core material are attached to guide pins that protrude from a press mold. This feature is characterized in that centering is easy and the concentric material is prevented from shifting during press molding by being hooked, and the specific means thereof are as follows.

[Means for solving problems]

■ Concave grooves are formed on the surfaces of the lower press die and the upper press die in a pattern such as a mesh or hexagonal pattern, and grooves are formed on either of the press die at the intersections and curved points of the grooves. position and protrude an appropriate number of guide pins.

(2) A core material is sewn onto a plate made of a non-metallic elastic material such as synthetic rubber, with the same pattern as the grooves described above.

(2) A non-metallic elastic body is filled into the groove formed in the lower pressing mold, and a plate is stacked on top of the non-metallic elastic body by engaging the guide pins at the intersections and curved points of the core material. Then, a non-metallic elastic body is filled onto the plate along the sewn portion of the core material.

(2) The plate and the non-metallic elastic body are integrated through press forming using the lower press mold and the upper press mold, and this is vulcanized.

〔Example〕

Specific embodiments of the present invention will be described below with reference to illustrative drawings.

A is an anti-slip device attached to a car tire,
The anti-slip device A is divided into a plurality of anti-slip pieces. Each anti-slip net 1 consists of a net part 2 and a pair of left and right mounting parts 3.

The net portion 2 is formed into a diagonal mesh shape using a non-metallic elastic body such as natural rubber, synthetic rubber, or synthetic resin as a material, and has a width dimension that is approximately the same as the width dimension of the tire. Installation is part 3
extend in a gate shape from both ends of the net portion 2 in the width direction. In addition, the net part 2 and the mounting part 3 are formed with an inverted U-shape or an inverted V-shape in cross section, and a reinforcing material such as a nylon cord is provided in the net part 2 and the mounting part 3. A suitable number of core materials 4 made of aramid fiber or the like and formed into a string shape are buried extending in the axial direction. Attachment rings 5 are provided at both corners of the distal end of part 3.

Although not shown, one end of the hook is hooked to the ring 5, and the other end of the hook is hooked to a ring made of rubber, for example. 3
By pulling the anti-slip net toward the axle, the anti-slip nets are provided so as to cover the outer periphery of the tire. The net portion 2 is formed into a substantially parallelogram shape with both longitudinal ends inclined in the same direction as the adjacent net portions, and when the anti-slip net 1 is attached to the tire, the joint portion (net Both longitudinal ends of the portion 2) 2'' are provided at an appropriate angle of inclination (for example, 45 degrees) with respect to the rotational direction of the tire, so that an installation condition can be obtained. Obtained by the method below.

In each of the drawings shown in FIGS. 4 to 7, C is a lower press die for forming the above-mentioned anti-slip net 1, D is an upper press die thereof, and both press dies C and D have a mesh pattern and a hexagonal pattern. The grooves 6 and 7 are bored facing each other in an appropriate pattern. That is, the lower press die C is provided with a groove 6 that has a U-shaped cross section, and the upper press die is provided with a groove 7 that is approximately semicircular in cross section. be done.

In addition, an appropriate number of guide pins 8 are protruded from the lower press die C at the intersections and concave points of the grooves 6, and the tips of the guide pins 8 are placed on the upper press die side during press forming. It is provided so as to face inside the groove 7.

On the other hand, numeral 9 is a thin plate made of a non-metallic elastic material such as natural rubber, synthetic rubber, or synthetic resin, and is formed into approximately the same size as the press molds C and D.
The core material 4 is sewn to the grooves 6 and 7 in the same pattern as the grooves 6 and 7.

The groove 6 is filled with a non-metallic elastic body 12 such as natural rubber, synthetic rubber, or synthetic resin, as shown in FIG.
The intersecting points and curved points of the core material 4 to be sewn onto the plate 9 are hooked to the guide pins 8 and overlapped. Next, the plate 9 is filled with a non-metallic elastic body 12 along the sewing pattern of the core material 4. And press lower mold C like this
By interposing the plate 9 in a sandwich shape on the concave groove 6 and press-molding it with both press molds C and D in a state filled with non-metallic elastic bodies 12 and 12 in a polymerized manner,
As shown in FIG. 7, the nonmetallic elastic body 12.12 and the plate 9 are integrated. Since the core materials 4 are hooked to the guide pins 8 during the press molding described above, a state is obtained in which the core materials 4 are buried in the center without protruding from the pattern. Further, the portion of the plate 9 other than the sewn portion can be pressed out using both press dies C and D.

The anti-slip net 1 shown in FIG. 1 is formed by vulcanizing the thus integrally press-molded state.

In this embodiment, the guide pin 8 is provided to protrude from the groove 6 of the lower press die C, but the guide pin 8 is not limited to this, and may be provided to protrude from the groove 7 of the upper press die. Also good.

[Effects of the Invention] The present invention is constructed as described above, and as described above, grooves are formed in a suitable pattern in a pair of upper and lower press dies, and grooves are formed in either of the press dies. An appropriate number of guide pins are protruded from one of the grooves at the intersections and concave points of the grooves, and a nonmetallic elastic body is filled in both press molds along the grooves. A core material is sewn to a plate formed into a thin plate using a non-metallic elastic material with the same pattern as the grooves, and the plate is hooked to the guide pin at the intersections and recesses of the concentric materials. By interposing the nonmetallic elastic body between the nonmetallic elastic bodies filled in both press molds, and integrating the nonmetallic elastic body and the plate by press molding,
It has now become possible to easily and reliably align the core material with respect to the concave groove through the action of engaging the concentric material with respect to the guide pin. In addition, as mentioned above, by hooking the intersections and recesses of the core material to the guide pins and press-forming them together with the non-metallic elastic body filled in the press mold, it is possible to The concentric material does not protrude from the pattern due to the pressing force, and it has become possible to obtain a good-finished anti-slip tool. In other words, it has become possible to obtain an anti-slip tool that not only provides good workability but also has excellent finished product quality.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of an anti-slip tool molded by the manufacturing method according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line B-B in Fig. 2, and Fig. 4 is a press The external perspective view of the lower mold and the plate, and FIGS. 5 to 7 are explanatory diagrams showing the molding process. A: Anti-slip tool, C: Lower press mold, D: Upper press mold, 1: Anti-slip net, 2: Net part, 2
'...Joint part, 3...Attachment part, 4...Core material, 5
... Attachment is by ring, 6, 7... Concave groove, 8... Guide pin, 9... Plate, 12... Non-metallic elastic body, 13...
...joint surface.

Claims (1)

[Claims] (1) A pair of upper and lower press molds are provided with grooves in an appropriate pattern, and an appropriate number of grooves are formed in one of the press molds at the intersection and curved points of the grooves. A guide pin is provided protruding therein, and a nonmetallic elastic body is filled in both press molds along the concave grooves, while a plate formed into a thin plate using a nonmetallic elastic body has the same pattern as the concave grooves. The intersecting points and curved points of the core materials are hooked to the guide pins, and the plates are interposed between the non-metallic elastic bodies filled in the press mold. A method for manufacturing an anti-slip device for automobile tires, which comprises integrating an elastic body and a plate by press molding.