JPH01208203A - Manufacture of spike tire and tread member thereof - Google Patents

Abstract

PURPOSE:To eliminate necessity for driving a pin using a gun and facilitate selection of the shape of pin and number of pins by boring a spike pin insert hole from the opposite surface to the surface to work as tread surface, forming tread member by means of vulcanization, and attaching it to the tire body after insertion of pins. CONSTITUTION:A spike tire tread member 3 is provided with an insert hole 2' so as to allow insertion of each spike pin 5 from the opposite surface to the surface which works as tread surface, which is followed by vulcanization and shaping. The spike pin 5 is inserted in this tread member 3 followed by fixation to the tire body 7 with a cushion sheet 6 and damping material 8 interposed. This constitution permits anybody of perform operation to drive pins certainly. The shape and size of the pin and the number of them can be selected easily.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention does not require equipment for driving spike pins;
The present invention also relates to a method for manufacturing a spiked tire that is free from defects such as pin stability and depression, and a tread member used in manufacturing the spiked tire.

[Conventional technology]

Conventionally, spiked tires have generally been manufactured by driving pins into the tread surface of a completed product tire using a spike driving gun.

In addition, when manufacturing a retreaded spike tire, for example, using a mold 1 having a protrusion 2 for forming a pin driving hole shown in FIG. 2 (A), the mold shown in FIG. A method of creating a vulcanized tread member 3 having a pin driving hole 2' corresponding to the protrusion 2 of the tread member 3, and bonding and integrating this tread member 3 with the tire body 7 with a cushion rubber 6 or the like interposed (generally, precure - A method of forming a tread using an unvulcanized rubber composition on the tread surface of a worn tire body to be retreaded and vulcanizing it using a mold (generally called remold retreading). ) is applied.

When driving spike pins into these retreaded tires, as shown in FIG. 2 (b), open holes 2° for driving spikes on the tread surface with the tip of the gun 4 for driving spike pins. Spiked tires are manufactured by driving the subak pin 5 here.

However, such conventional methods of manufacturing spiked tires first require gun equipment for driving the spike bottles, which requires equipment costs, space, and labor for driving the spike bottles. There is a risk of damaging the tread part due to pin driving with a gun, and the spike pin cannot be driven perpendicular to the driving surface.
The discharge amount of the pin is not constant, and if you force it too much, the tip of the gun will break, so you have to correct it.
There were many problems such as the long working time and the fact that driving requires skill (beginners cannot drive spike pins). Furthermore, if the spike pin is made of a material with low rigidity, such as plastic or rubber, there is a drawback that the pin cannot be driven.

[Purpose of the invention]

The object of the present invention is to provide a novel method for manufacturing a spiked tire and a tread member for use in manufacturing a spiked tire or a precure-retreaded spiked tire, which eliminates the above-mentioned problems and drawbacks.

[Structure of the invention]

The object of the present invention is to provide a vulcanized tread member having through-holes for inserting spike pins from the surface opposite to the surface constituting the tread surface of the tire (the surface bonded to the tire body), as well as this tread member. This can be achieved by inserting a spike pin into the pin insertion hole formed in the tread member and then bonding the spike pin insertion surface to the tire body.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

FIG. 1A and FIG. 1B are a perspective view showing an example of a mold for manufacturing a tire tread member of the present invention, and a method for manufacturing a spiked tire and a pre-cured retreaded tire of the present invention using the tread member, respectively. FIG.

In FIG. 1A, 1 is a mold for forming a tread member, and 2 is a projection for forming a hole for inserting a spike pin. Using the mold 1 having this protrusion 2, a trend member 3 for a spiked tire shown in FIG. 1B having a pin insertion hole 2' shaped corresponding to the protrusion 2 is vulcanized.

Hole 2 for pin insertion in this vulcanized tread member 3
'' passes through the tread member 3, and its size, shape, and dimensions are preferably such that a pin can be easily inserted without using a pin driving gun or the like.

Before attaching the pin insertion surface of the trend member 3 to the tire body 7, the spike pin 5 is inserted through the spike pin insertion hole 2° of the tread member 3, as shown in FIG. 1B. Ru. The tread member 3 into which the pin 5 is inserted is laminated with unvulcanized cushioning rubber 6, cushioning material 8, etc. as appropriate, and then laminated onto the tire body 7 and joined and integrated to form a tire. be.

That is, instead of driving pins into the tire tread surface with a spike gun, a vulcanized or semi-vulcanized tread member is used as a strip or in a ring shape, and spike pins that are previously provided on the tread member are used. In this method, the pin 5 is inserted into the insertion hole 2°, and then this pin insertion surface is joined to the tire body 7 to manufacture the tire.

According to the present invention, there is no need to drive pins using a gun, and the pins can simply be manually inserted into the pin insertion holes of the trend member before joining the tire tread member to the tire body. Well, it doesn't require any skill.

Here, the trend member is not particularly limited as long as it is a band-shaped tread portion made of any rubber composition and various tread patterns formed thereon.

In addition, when bonding to the tire body, unvulcanized cushioning sheets 6, cushioning material 8 to prevent the pins from collapsing, etc. are laminated.
These can be joined and integrated at the same time.

In addition, by arranging a different type of rubber, preferably rubber reinforced with modillas, high hardness rubber, fiber, etc., as a cushioning material 8 on the pin implantation surface (pin insertion surface) of the tread member, the tread surface It is possible to more effectively prevent the pin implanted in the pin from collapsing during use.

〔Effect of the invention〕

According to the present invention, the following excellent effects can be obtained.

1) The pin can be implanted without using a gun for spike pin implantation (no gun equipment required), and the time required for driving the pin is halved compared to when using the above-mentioned gun.
Anyone can type it without any skill.

2) Since it is possible to drill holes in the tread that match the shape of the pin, the pin can be completely inserted. Therefore, there is no distortion of the pin and no variation in the amount of discharge port, unlike when the pin is driven in with a gun, and the occurrence of the pin falling out during use of the tire is extremely low.

3) If the protrusion 2 is a removable type such as a screw-in type,
The shape, size, and number of spike pins that match the usage conditions of the tire can be easily selected.

4) Synthetic pins made of resin or plastic with low rigidity other than metal pins can be easily implanted.

[Brief explanation of the drawing]

FIGS. 1A and 1B are respectively a perspective view showing an example of a mold for forming a tire trend member of the present invention and an example of a method for manufacturing a spiked tire using a tread member obtained from the mold. FIGS. 2(a) and 2(b) are a cross-sectional view for explaining a conventional spike tire retreading tread member molding die and a cross-sectional view for explaining a method for manufacturing a retreaded spike tire, respectively. It is. 1... Mold, 2... Protrusion, 2°... Hole for pin implantation, 3... Tread member, 4... Gun, 5...
Pin, 6... Cushion sheet, 7... Tire body, 8... Cushioning material. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] 1. After vulcanizing and molding a tread member with a through hole for inserting a spike pin from the opposite side of the surface constituting the tread surface of the tire, and inserting the spike pin into the hole for inserting the pin, A method for manufacturing a spiked tire, which comprises bonding the spike pin insertion surface to a tire body. 2. A tread member for a spiked tire, characterized by having a through hole for inserting a spike pin from the surface bonded to the tire body.