JPS6327453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method of manufacturing a rubber roller for spinning.

(Technical Background of the Invention and Problems thereof) Conventionally, rubber rollers for spinning have been manufactured by directly fixing a rubber tip onto a core metal for a roller with an adhesive. However, when an adhesive is used in this manner, the rubber tip easily separates from the circumferential surface of the roller core metal, so there is a drawback that the rubber tip comes off from the roller core metal in a relatively short period of time.

Therefore, recently, rubber tips have been created to have an inner diameter smaller than the outer diameter of the roller core metal.
Fitting this rubber tip to the roller core metal, that is, fitting the roller core metal with a predetermined tightening margin.
Rubber rollers for spinning are manufactured using a forced fitting method. In this method, if the tightening allowance is small, the rubber tip will simply come off the roller core metal as described above, so the tightening margin is made large to some extent, but if the tightening allowance is too large, the rubber tip will fall off the roller. Since it becomes difficult to fit the rubber roller onto the core metal, it takes a lot of time and effort to manufacture the rubber roller for spinning.

(Object of the Invention) An object of the present invention is to provide a method of manufacturing a rubber roller for spinning, which allows a rubber tip to be firmly fitted onto a core metal for a roller without increasing the tightening margin.

(Summary of the Invention) The present invention involves laminating a reinforcing material and an unvulcanized rubber sheet to create a band-shaped laminated material, vulcanizing the unvulcanized rubber sheet to form an internal rubber layer, and then creating a band-shaped laminated material. The laminated material is wound around a molding core with a slight gap while applying tension to the inner rubber layer, and then an unvulcanized rubber layer that will become the outer rubber layer is coated on the strip-shaped laminated material, and this rubber layer is The present invention is characterized in that a rubber cap having an internal rubber layer having elasticity is created by vulcanization, and the rubber cap is fitted onto a roller core with a predetermined tightening margin.

(Embodiments of the Invention) Hereinafter, the manufacturing method of the present invention will be explained in detail with reference to the drawings.

First, a 0.4 mm thick reinforcing material 1 made of cotton cloth (see Figure 1) and a 1.5 mm thick unvulcanized nitrile rubber sheet were pressed together using a calender to create a laminate.

Next, this laminate is cut into strips with a width of 2 mm, and the unvulcanized nitrile rubber sheet is vulcanized to form the reinforcing material 1 and the internal rubber layer 2, as shown in FIG. A strip-shaped laminate material 3 was obtained.

Next, as shown in FIG. 2, this strip-shaped laminated material 3 is placed on a molding core 4 having an outer diameter of 18 mm, with the inner rubber layer 2 placed on the inside, and while applying tension to the inner rubber layer. It was wrapped while maintaining a slight gap.

After the strip-shaped laminate material 3 is wrapped around the molding core 4, the strip-shaped laminate material 3 is coated with unvulcanized nitrile rubber by extrusion to a thickness of 10 mm and vulcanized. outer rubber layer 5 (see Figure 3)
The molding core bar 4 is then extracted from the strip-shaped laminate material 3, the molded body consisting of the strip-shaped laminate material 3 and the outer rubber layer 5 is cut into predetermined dimensions, and the peripheral surface of the outer rubber layer 5 is polished. As a result, I created a rubber band. The resulting rubber pot had an inner diameter of 18 mm.

Finally, as shown in Figure 3, tighten the rubber tip.
It was fitted onto a roller core bar 6 having an outer diameter of 18.3 mm, thereby producing a rubber roller for spinning according to the present invention.

In this way, the internal rubber layer 2 is formed in advance by vulcanizing the unvulcanized nitrile rubber sheet, and while applying tension to the internal rubber layer 2, the molding core bar 4 is applied together with the reinforcing material.
When wrapped around the inner rubber layer 2, it has elasticity.
That is, since a rubber cap having a tightening force for tightening the roller core bar 6 on the inner rubber layer 2 is obtained, as described above, the tightening margin between the rubber cap and the roller core bar 6 is set as small as 0.3 mm. Also, the rubber tip can be firmly fitted to the roller core bar 6. Therefore, the work of fitting the rubber fitting onto the roller core bar 6 can be easily performed.

In the above embodiment, if the tightening margin between the rubber tip and the roller core 6 is set to 0.3 mm or less, the rubber tip will come off from the roller core 6 in a short period of time because the tightening force of the rubber tip is small, and if it is 1.0 mm or more, the rubber tip will come off from the roller core 6. This makes it difficult to fit the rubber tip onto the roller core metal 6, which poses a problem in terms of workability.

As the internal rubber layer 2 and the external rubber layer 5, rubber materials such as natural rubber, butadiene rubber, styrene-butadiene rubber, and isobrene rubber can be used. When formed, the adhesion with the roller core bar 6 is improved.

The reinforcing material 1 is preferably a woven fabric or a mat-like material, and may be formed from natural fibers, synthetic fibers, synthetic resins, or the like.

The roller core bar 6 is preferably a knurled or roughened metal bar, which can further improve the adhesion to the rubber tip.

(Effects of the Invention) According to the present invention, a strip-shaped laminated material having an internal rubber layer is created in advance by vulcanizing an unvulcanized rubber sheet to be laminated with a reinforcing material, and the tension is applied to the inner rubber layer of the strip-shaped laminated material. and wrap it around a core metal for molding with a slight gap maintained, cover the unvulcanized rubber layer that will become the external rubber layer on the strip-shaped laminated material, and create a rubber cotto by vulcanizing it. By fitting it into the roller core metal, even if the tightening margin between the rubber tip and the roller core metal is small, the rubber tip can be firmly fitted to the roller core metal due to the tightening force of the internal rubber layer. can do. Therefore, it is possible to manufacture a spinning rubber roller with good workability in which the rubber tip does not come off from the roller core metal over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a band-shaped laminated material, FIG. 2 is a cross-sectional view showing the band-shaped laminated material wound around a molding core, and FIG. 3 is a cross-sectional view of a rubber roller for spinning according to the method of the present invention. DESCRIPTION OF SYMBOLS 1... Reinforcement material, 2... Internal rubber layer, 3... Band-shaped laminated material, 4... Core bar for molding, 5... External rubber layer, 6... Core bar for roller.

Claims (1)

[Claims] 1. A reinforcing material and an unvulcanized rubber sheet are laminated to create a band-shaped laminate material, and the unvulcanized rubber sheet is vulcanized to form an internal rubber layer, and then the band-shaped laminate material is The rubber layer is positioned on the inside, and while applying tension to the inner rubber layer, it is wound around the molding core with a slight gap maintained, and then the unvulcanized rubber layer is coated on the wound strip-shaped laminate material. A method for manufacturing a rubber roller for spinning, comprising: creating a rubber tip having an external rubber layer by vulcanizing the unvulcanized rubber layer, and fitting the rubber tip onto a roller core with a predetermined tightening margin. .