GB2040870A

GB2040870A - A method of winding a rubber thread around a core to form a rubber thread wound golf ball

Info

Publication number: GB2040870A
Application number: GB8001465A
Authority: GB
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 1979-01-16
Filing date: 1980-01-16
Publication date: 1980-09-03
Also published as: AU519879B2; GB2040870B; AU5464980A; JPS5596170A; JPS6149985B2

Abstract

A rubber thread wound golf ball is manufactured by sticking and fixing an end portion of a rubber thread (2) to a solid core (1) by applying an adhesive (3), winding a given amount of the rubber thread around the solid core to form a rubber thread wound centre, and sticking and fixing a terminal end portion of the wound rubber thread to the rubber thread wound centre by means of an adhesive. <IMAGE>

Description

SPECIFICATION A method of winding a rubber thread around a core to form a rubber thread wound golf ball The present invention relates to a method of winding a rubberthread around a core to form a rubber thread wound golf ball.

Rubber thread wound golf balls are usually manufactured by winding a rubber thread around a solid or liquid core to form a rubber thread wound centre and covering the centre with a cover layer. Solid cores have been recently particulariy used as cores for rubber thread wound golf balls, but when a rubber thread is wound around a solid core firstly the rubber thread is wound 2 to 3 times around the spherical surface of the solid core and the windings entangled with each other to stock and fix a top end portion ofthe rubberthread and then a given amount of rubber thread is wound around the solid core, after which a terminal end portion of the rubber thread is entangled with the wound rubber thread at the surface of the rubber thread wound centre to stick and fix the end portion. However, such a method has the following drawbacks.

(1) A manual operation is necessary and the productivity of the process is low.

(2) The sticking and fixing are uneven and unwinding of the rubber thread occurs and attention has to be paid to transferring to the succeeding step.

(3) If a length oftheterminal end rubberthread extending from the position where the rubber thread is entangled at the terminal position of winding is long, the rubber thread projects during the next step of covering the centre with a cover layer and shaping and an inferior product is formed.

The present invention provides a method of winding a rubber thread around a solid core to form a rubber thread wound golf ball comprising a solid core, a rubberthread and a cover layer, which comprises sticking and fixing a top end portion of the rubber thread to the solid core by using an adhesive upon winding the rubber thread around the solid core under tension, winding a given amount of the rubber thread around the solid core to form a rubber thread wound centre, and then sticking and fixing a terminal end portion of the wound rubber thread to the rubber thread wound centre by means of an adhesive.

The invention will be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a schematic view showing the state where the winding of the rubber thread is begun according to the method of the present invention; and Figure 2 is a schematic view showing the state where the winding of the rubber thread is finished according to the method of the present invention.

When a rubber thread 2 is to be wound around a solid core 1, the solid core 1 is stationarily put at a given position on a thread winding machine was shown in Figure 1 and an adhesive 3 is discharged onto an upper side of the spherical surface of the core through a microdispenser 4 in such an amount that the adhesive does not flow down from the core and then an end portion of the rubber thread 2 is fixed by a terminal clamp 5 and a moderate tension is applied to the rubber thread by a guide roller 6 and the rubber thread 2 is forcedly compressed to the position where the above described adhesive has been discharged to stick and fix the rubber thread by means of the adhesive. Use may be made of any suitable adhesive but cryanoacrylate instantaneous adhesive is preferable in view of practical operability. In this case, it is advantageous to blow air to the fixed position after compressing the rubber thread to the solid core 1 to promote the drying of the adhesive.

After the rubber thread 2 is stuck and fixed to the solid core 1 by the adhesive 3, as shown in Figure 2, a given amount of rubber thread 2 is wound around the solid core 1 under tension while compressing the rubber thread with a roller 7.

For finishing the winding of the rubber thread 2, as shown in Figure 2, an appropriate amount of an adhesive 3 is discharged, in the same manner as in the beginning of winding, onto the surface of the rubber thread wound centre 8 from the above side of the rubber thread 2 and the rubber thread is compressed by the roller 6 to stick and fix the rubber thread. In this case, the rubber thread is cut by a cutter at a position as near as possible to the fixed position so that the terminal end portion of the cut rubber thread 2 does not become long. Alternatively, it is possible to compress the rubber thread 2 to the surface of the rubber thread wound centre 8 where the adhesive 3 has been discharged, to stick and fix the rubber thread. The above described successive processes can be easily automated by providing a winding machine w with the microdispenser 4, a cutter and the other additional mechanisms, so that it is not necessary to reply upon manual operation and the productivity of the method is considerably improved.

There is no danger of the stuck and fixed portion being unwound after finishing the winding, so that the rolling transfer to the next step is feasible.

Furthermore, the terminal rubber thread at the stuck and fixed portion can be shortly cut off, so that when the rubber thread wound centre is covered with a cover layer and shaped, there is no danger of the rubber thread unwinding and projecting, so that the successive steps of covering with a cover layer and shaping can be automated and the productivity of producing the golf balls is improved.

Claims

1. A method of winding a rubber thread around a solid core to form a rubber thread wound golf ball comprising a solid core, a rubber thread and a cover layer, which comprises sticking and fixing a top end portion of the rubber thread to the solid core by using an adhesive upon winding the rubber thread around the solid core under tension winding a given amount of the rubber thread around the solid core to form a rubber thread wound centre, and then sticking and fixing a terminal end portion of the wound rubber thread to the rubber thread wound centre by means of an adhesive.

2. A method according to Claim 1 of winding a rubber thread around a solid core to form a rubber thread wound gold ball, substantially as herein described with reference to the accompanying drawings.