JPS6184215A - Manufacture of non-slip rubber belt for car tire - Google Patents

Abstract

PURPOSE:To enable inexpensive manufacture of a nonslip rubber belt with a reduced vulcanizing labor hour by using an intermediate vulcanizing force capable of fixing or removing two round steel rods having each diameter of 5-20mm at a specified distance and in parallel. CONSTITUTION:A vulcanizing mold to be used is composed of the top and bottom vulcanizing forces each having a concave groove which can mold beltlike and slantwise intersecting networks and holes capable of passing a string at both edges and an intermediate vulcanizing force capable of fixing and dismounting, at a specified distance and in parallel, two round steel rods 6 each having a diameter 5-20mm for molding holes to pass strings. The unvulcanizing rubber string 12 in which reinforcing fiber cores are inserted is arranged and wound in advance on the intermediate vulcanizing force in the shape of beltlike, slantwise intersecting network, inserted into the bottom vulcanizing force, vulcanized and molded to make many holes 4 for passing the string in the length direction of the rubber belt at both edges of the molded rubber belt 1. The time to supply material between the top and bottom forces is short, the vulcanizing efficiency is excellent and the manufacturing cost is made low.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an anti-slip rubber band for automobile tires for preventing automobile tires from slipping on snowy, frozen, muddy, or other road surfaces.

That is, in place of the conventional metal chains for noise prevention and road damage prevention, rubber and plastic automobile tire anti-slip bands can be considered, but the present invention provides anti-skid effects and durability. The present invention relates to a method for inexpensively manufacturing an automobile tire anti-slip rubber band that has excellent performance and drivability, and is simple and easy to attach and detach.

Among the conventional rubber and plastic anti-slip belts for automobile tires, rubber cords containing reinforcing fibers are made using vulcanization molds.
A product formed by integrally vulcanizing the diagonal mesh has excellent anti-slip effect, durability, and operability, but has the following drawbacks.

It is extremely difficult to pre-shape the unvulcanized rubber string with a reinforcing fiber core so that it fits into the recesses of the diagonal mesh formed on the inner surface of the molding die.

Because of this, approximately 15 to 20 meters of unvulcanized rubber string with a reinforcing fiber core is sequentially fitted into the concave grooves of the oblique mesh on the surface of the hot vulcanization mold. It takes a long time. Furthermore, this has caused major drawbacks in molding, such as the initially charged unvulcanized rubber shrinking and deforming due to the heat of the mold, resulting in derailment or premature loss of vulcanization, resulting in defective products.

In addition, the automobile tire anti-slip band vulcanized and molded by the conventional method has metal fittings for attaching wires or ropes, etc. that are attached to the automobile tire and tightened to fix it.
Requires labor and metal fittings to install ~85 pieces. This metal fitting is said to be the cause of damage to the aluminum foil of the tire.

Furthermore, conventional automobile tire slip bands have the disadvantage that they are difficult to install.

The present invention aims to improve the drawbacks of such conventional methods. In other words, conventionally, automobile tire slippage [
The rubber band had the above-mentioned drawbacks because it was made of a sulfuric acid mold on the upper and lower sides.

In addition to the upper and lower molds, the present invention has a diameter of 57!11
It is characterized by the use of a medium vulcanization mold with a mechanism that allows two pieces of 29 mm round steel to be fixed in parallel at a predetermined interval and released, and a large number of spares of this medium mold are kept, and reinforcements are added to this mold. Prepare the fiber cored unvulcanized rubber cord by wrapping it in a diagonal mesh in advance.

This greatly reduces the number of man-hours required for curing, and also uses a medium vulcanization mold on both edges of the formed rubber band.

By simultaneously molding the string holes, it is possible to efficiently and inexpensively manufacture anti-slip rubber bands for automobile tires, which have excellent functions not found in conventional products. In other words, the method for producing a rubber band for automobile tire slippage according to the present invention involves forming a concave groove in which a band-shaped diagonal cross-shaped mesh and string-passing holes penetrating both edges of the band-shaped mesh are formed. Two round steel bars with a diameter of 5 to 2Q mm were fixed in rows at desired intervals in upper, lower, and paired molding vulcanization molds. A step of winding the vulcanized rubber cord so that it has the same mesh shape as the upper and lower vulcanization molds, a step of placing it into the upper and lower vulcanization molds, and a step of pressurizing and heating it. It is characterized by the step of forming diagonal cross-shaped mesh rubber bands of 1° and string holes at both edges thereof by vulcanization molding.

The rubber used in the present invention is natural rubber or synthetic rubber.

Whatever you do is fine. Rubber chemicals such as sword sulfur agents are mixed and used. Strength especially with reinforcing agents,) abrasion resistance,
Uses a rubber compound with excellent weather resistance and cold resistance.

The reinforcing fiber core material may be any natural or synthetic fiber, but polyamide or polyester fibers, which have excellent heat resistance and strength, are preferred, and in order to improve adhesion with rubber,
Those treated with resorcin formalin latex are particularly good.

Unvulcanized rubber strings with reinforcing fiber cores are made by extruding compounded rubber into strings of the desired shape using an extruder.

15 method is efficient, in which a reinforcing fiber core is simultaneously extruded into the center.

The fixing rope that is passed through the string holes on both edges of the rubber band is a braided cord or rubber cord made of natural or synthetic fibers.

The present invention will be explained below with reference to Examples. 2) 1°
Example 1 The first and second vulcanization molds were prepared in advance into a shape that matched the concave grooves of the upper and lower vulcanization molds, which had concave grooves that could form belt-shaped oblique meshes and string-passing holes in both grades. As shown in Figures 5a and 5b, align with the 5th preparation position 9 of the middle sword mouth sulfur mold 6,
Unvulcanized rubber strings 12 containing a reinforcing fiber core are wound and arranged in the order of 21 to 49.

As shown in FIG. 5C, this is fastened using unvulcanized rubber thread 18 containing reinforcing fibers for fastening to complete the preparation. For this preparation, it is sufficient to make a few dozen pieces in advance of vulcanization molding. Next, the middle vulcanization mold to the auxiliary tool 8 are removed from the prepared middle vulcanization mold 6, inserted into the upper and lower vulcanization molds, and heated under pressure with a heat press machine to cure the knife. After forming, the medium vulcanization mold fixing tool 7 is removed from the medium vulcanization mold round steel 6, and the medium vulcanization mold round steel 6 is removed from the diagonal lid-like mesh rubber band 15.
An automobile tire slip market rubber band 1 shown in FIG. 1 is obtained. FIG. 2 is a diagram showing this device installed on a tire.

・Example 24・) ゛ A pair of upper and lower vulcanization molds having a band-shaped oblique operculum mesh and concave grooves on both edges thereof into which string holes j can be formed are prepared in advance as shown in FIG. 6a. Using the preparation plate 10 as shown above, the reinforcing fiber cored unvulcanized rubber cord 12 is placed around the preparation plate guide bin 11 according to steps 51 to 71. Next, as shown in FIGS. 5a to 5b and 5C, they are fastened using the unvulcanized rubber thread 13 with a reinforcing fiber core for fastening.

Next, as shown in FIG. 6b, both parts of the mesh rubber band are removed from the preparation plate guide bin 11, and after 1.1 passing the round steel 6 for the middle sword mouth sulfur mold, the middle vulcanization is carried out. It is fixed with a mold fixture 7.

Next, both edges of the reinforcing fiber cored unvulcanized rubber string 12 are aligned with the preparation position of the medium vulcanization mold to complete the preparation. To prepare for this, it is sufficient to make a large number of IXs prior to vulcanization molding.

Next, this prepared middle vulcanization mold is inserted into the upper and lower vulcanization molds, and after being pressurized and heated with a heat press machine to form a sword mouth curing mold, the middle mouth vulcanization mold round steel Remove the middle vulcanization mold fixture 7 from 6, and remove the oblique lid-like mesh rubber band 2. .

When the round bar 6 is pulled out into the middle vulcanization mold, an automobile tire slip rubber band 1 shown in FIG. 8 is obtained. FIG. 4 is a diagram showing this device installed on a tire.

The belt-shaped diagonal mesh of the present invention, the upper and lower vulcanization molds having concave grooves on both edges thereof to form the string-through holes, and the diameter 5 to 100 mm for forming the string-through holes. Using a vulcanization mold made up of eight people, including a vulcanization mold that can fix and dismantle two 26 mm round steel rods in parallel at a predetermined interval, unvulcanized 1.・Prepare the rubber cord in a middle vulcanization mold by wrapping it in a band-like diagonal mesh, then insert it into the upper and lower mouth vulcanization molds to perform vulcanization molding. IX, in which a large number of string holes are formed in the lengthwise direction of the rubber band in both parts of the rubber band thus formed.
It is characterized by

As a result, it is possible to efficiently and inexpensively manufacture rubber bands for automobile tires that have excellent functions not found in conventional products.

In summary, the present invention has the following advantages.

1) A diagonal cross-shaped mesh band is prepared in advance in the middle vulcanization mold, and since a large number of mesh bands are prepared in advance before the cutter curing, the time for charging the upper and lower vulcanization molds is shortened, and the vulcanization Good efficiency 1.
It can be produced cheaply and efficiently.

2) Since the automobile tire slipping T-hime rubber band of the present invention has string holes on both edges, 2) unlike conventional products, tightening requires the effort and expense of installing multiple fittings for hanging fixing ropes. It does not require 7. Also, this metal fitting often damages rubber strings, aluminum foil, etc.

B. When tightening the fixed rope passed through the string hole before mounting the tire, the automobile tire anti-slip rubber band will have a shape similar to that of the tire, that is, the width will be semicircular and the length direction will be circular. Fit this from the outside of the tire, cover it with the tire, move the car forward 80 to 40 crn, and then tighten the fixed rope sufficiently and attach it to the tire, so there is no need to jack it up. It can be installed easily and easily.

8) The anti-slip rubber band for automobile tires of the present invention is strong 2.1
It has excellent durability because it is integrally molded into a mesh shape with a reinforced fiber core and reinforced rubber with excellent abrasion resistance and strength. In addition, since it has an elastic and flexible structure, it is easy to drive, does not generate noise, and does not damage roads.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing the main parts of a product according to Example 1 of the present invention, and FIG. 2 is a view of the same product according to Example 1 installed on an automobile tire. FIG. 8 is a partial perspective view showing the main parts of a product according to Example 2 of the present invention. Fig. 4 is a diagram showing how the same product according to Example 2 is mounted on an automobile tire, and Fig. 5a is a diagram showing how the same product according to Example 2 is mounted on an automobile tire. This is a diagram prepared for the mesh. Fig. 5b is an enlarged view of the edge of Fig. 5a, Fig. 5C is a view of the edge of Fig. 5a with a hole for passing a string through, and Fig. 6a is an enlarged view of the edge of Fig. 5a. Fig. 6b is a diagram in which an unvulcanized rubber cord with a reinforcing edge and one fiber core is prepared in a diagonal opercular mesh on a preparation plate, and Fig. 6b is a diagram in which the preparation in Fig. 6a is transferred to a middle mold. Figure 6C is an enlarged view of the edge of Figure 6b. l... Vulcanized oblique lid-like mesh rubber band 2... Vulcanized rubber 8... Reinforcement fiber core 4... Green string hole 5... Tighten with fixing rope 6 ... Medium vulcanization mold round steel 7 ... Medium vulcanization mold (round steel) 1. Fixture 8 ... Medium vulcanization mold auxiliary tool 9 ... Preparation of medium vulcanization mold Position 10... Preparation board 11. ... Preparation board guide bin 12 ... Unvulcanized rubber cord with reinforcing fiber core 18 ...
Unvulcanized rubber strings with reinforcing fibers for fastening 21 to 49... Wrapping of unvulcanized rubber strings with reinforcing fiber core is ranked 51 to 71... Unvulcanized rubber strings with reinforcing fiber core are arranged first Figure 2 Figure 3 Figure 4 Figure 5a Figure 5C

Claims (1)

[Scope of Claims] 1. A method for producing an anti-slip rubber band for an automobile tire, comprising a band-shaped diagonal mesh and a concave groove in which a string hole passing through both edges of the band-shaped mesh is formed. Into the upper and lower pairs of molding vulcanization molds, two round steel pieces with a diameter of 5 to 20 mm are fixed in parallel at a desired interval to a middle vulcanization mold.
A step of winding an unvulcanized rubber cord containing a reinforcing fiber core so that it has the same mesh shape as the upper and lower vulcanization molds, and placing it into the upper and lower vulcanization molds. process and
A method for producing an anti-slip rubber band for an automobile tire, which comprises the steps of forming an oblique mesh rubber band and string holes at both edges thereof by pressurizing and heating and vulcanizing the band. .