JPS5928645B2 - Rubber roller for spinning and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber roller for spinning and a method for manufacturing the same.

More specifically, the present invention relates to a highly durable spinning rubber roller obtained by closely fitting (forcibly fitting) a specific cylindrical rubber control to a metal core without using an adhesive, and a method for manufacturing the same.

BACKGROUND ART Conventionally, rubber rollers for spinning have been widely used in which a rubber tip and a metal core for the roller are integrated by adhesive.

However, the integrated adhesive rubber roller has the disadvantage that the adhesive force gradually decreases after long-term use, and the rubber layer easily peels off.

For this reason, a forced fitting method is also applied to rubber rollers, in which a rubber contact having an inner diameter slightly smaller than the outer diameter is tightly fitted onto the outer peripheral surface of a metal core for a roller without using an adhesive.

However, although the rubber rollers used in this forced fitting method are easy to fit, the fitting force is low, so the rubber roller has the disadvantage that the rubber tip is likely to come off.

On the other hand, there has also been a proposal to cover the inner periphery of a rubber tip with a fiber layer and to bond and integrate this with a metal core for a roller using an adhesive.

However, although the rubber rollers obtained in this way have superior adhesion compared to those with only a rubber layer, they still have a tendency to peel off during long-term use, and are still insufficient in terms of durability. It was something.

This invention was made in order to eliminate the drawbacks of the conventional rubber rollers for spinning as described above, and it is possible to easily fit the rubber tip tightly into the metal core during manufacturing, and the resulting rubber roller has an excellent fit. To provide a rubber roller for spinning which exhibits a resultant force, is resistant to prickles and de-core, and has further improved durability.

Thus, according to the present invention, the inner rubber layer with a thickness of 0.5 to 3.0 mm and the outer rubber layer with a thickness of 0.1 to Q, 5
A rubber roller for spinning, which is formed by tightly fitting a rubber cot integrally formed with a reinforcing material layer of 0.5 mm to 1.0 mm on the outer peripheral surface of a metal core for the roller. is provided.

Furthermore, according to this invention, a strip-shaped laminated sheet in which a reinforcing material layer and an unvulcanized rubber sheet are crimped is tightly wound around a metal core for molding so that the rubber layer is on the inner circumferential side, and the unvulcanized rubber sheet is wrapped around the outer circumference of the laminated sheet. After coating the rubber layer, it is vulcanized and cut into a predetermined width if necessary to obtain the above-mentioned rubber tip consisting of an inner rubber layer, a reinforcing material layer and an outer rubber layer, and the rubber tip is tightly fitted into a metal core for a roller. Provided is a method for manufacturing a rubber spinning roller, which comprises forming the rubber roller for spinning.

The present invention will be explained below based on the accompanying drawings.

The thickness of the internal rubber layer 1 of the three-layered rubber joint used in this invention is 0.5 to 3.0 mTL, the thickness of the reinforcing material layer 2 is 0.1 to Q, and the tightening margin with the metal core is 5 mm. 5 is 0.5-1. Preferably it is Qmi.

If the thickness of the internal rubber layer is less than 0.5 TLn, it becomes extremely difficult to fit the rubber tip into the metal core, which is not preferable.

Moreover, if the thickness of the internal rubber layer is 3.0 mm or more, the fitting force will be weak, so the rubber conduit will be more likely to fall out of the core earlier than the metal core, which is not preferable.

Further, if the thickness of the reinforcing material layer is less than 0.1 mtn, the clamping force to the metal core will be insufficient, and if it is more than 0.5 mm, the overall rubber elasticity will be impaired, which is not preferable.

Further, the thickness of the external rubber layer 3 is not particularly limited in the present invention, but it is suitably about the same thickness as the rubber layer used for ordinary spinning and l rubber rollers, that is, about 3 to 30 mm.

Further, when the rubber fitting as described above is tightly fitted into the metal core 4 for the roller, it is preferable that the tightening margin is 0.5 to romrn.

The contractile force of the rubber is insufficient under 0.5 mmJd,
1. If it is more than Ou, it becomes difficult to insert the metal core, which is not preferable.

The rubber material used for the inner rubber layer and the outer rubber layer of this invention may be any rubber-like elastic material, and usually nitrile rubber, natural rubber, styrene-butadiene rubber, butadiene rubber, inbrene rubber, etc. can be used, and both layers can be made of the same rubber. material or a combination of different rubber materials.

However, as the outer rubber layer, Nit-IJ, which has good oil resistance,
It is preferable to use rubber, and for the internal rubber layer, natural rubber or styrene-butadiene rubber is preferably used from the viewpoint of friction coefficient, cost, etc.

Generally, it is preferable to use a rubber material with a slightly lower hardness for the inner rubber layer than for the outer rubber layer, from the viewpoint of adhesion to the metal core and, ultimately, the durability of the rubber roller.

The most preferred combination of rubber materials in this invention is J
The hardness according to IS is 65° to 85° for the inner rubber layer and 70° to 900° for the outer rubber layer.

A woven fabric or a mat-like material can be used as the reinforcing material layer in this invention.

Examples of the material include various natural fibers, recycled fibers, synthetic fibers, synthetic resins, and metals.

Cotton cloth is the most suitable material for the woven cloth in terms of clamping force and cost.

The metal core for the roller used in this invention may be a commonly known iron core, and it is more preferable to use one with a roughened surface, such as one with a grooved surface, from the viewpoint of adhesion and fixation with the rubber tip. .

In manufacturing the rubber roller of the present invention, a rubber stub consisting of an internal rubber layer, a reinforcing material layer, and an external rubber layer is first manufactured.

The manufacturing method for this rubber kotto is as follows: First, a reinforcing material 7 and an unvulcanized rubber sheet 6, which will become an internal rubber layer, are pressed together to obtain a strip-shaped laminated sheet 8, and this is used as a metal core for molding, with the rubber layer forming the inner circumferential side. After winding it one or more times in the same manner, the outer periphery is coated with an unvulcanized rubber layer that becomes an external rubber layer, the core is vulcanized, the core is removed, and the desired shape is shredded and polished.

The above-mentioned pressure bonding method is not particularly limited, but a calendar molding method or the like is usually suitable.

Furthermore, when winding the laminated sheet around the metal core for molding, it is desirable to wind it tightly so that there are no overlapped parts or gaps so that the thickness of the reinforcing layer is uniform.

Further, the unvulcanized rubber coating for the external rubber layer is desirably carried out by crosshead extrusion or the like in order to obtain a predetermined thickness, but is not particularly limited.

In this way, a rubber coat consisting of an inner rubber layer, a reinforcing material layer and an outer rubber layer of a desired thickness is obtained.

The rubber roller of the present invention can be obtained by tightly fitting the above-mentioned rubber control into a metal core for a roller.

As described above, the rubber roller for spinning of the present invention is made by tightly fitting a rubber tip with a reinforcing material layer between the inner and outer rubber layers into a metal core, so it is easy to fit in, and furthermore, after fitting, the reinforcing material layer is provided between the inner and outer rubber layers. The clamping force of the layers on the metal core works, and combined with the shrinkage force of the internal rubber layer on the metal core, the fitting force is extremely strong, and even during long-term use, the rubber core will not peel off from the metal core.
It has the advantage that it does not decore and its durability as a rubber roller for spinning is significantly improved.

Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited thereby.

Example 1 A laminate sheet was obtained by pressing a reinforcing cotton cloth sheet (thickness: Q, 3 mm) and an unvulcanized nitrile rubber sheet (hardness: 80°, thickness: 1 mm) using a quadruple calendar roll 9. .

The laminated sheet was cut into a predetermined width (20 mm) to obtain a strip-shaped laminated sheet.

This strip-shaped laminated sheet is wound spirally around a molded core coated with a release agent with a predetermined external shape, with the reinforcing layer on the outer periphery side and the thickness of both layers uniform, without any gaps, and both ends Fixed.

This was fed to a crosshead extruder, and unvulcanized nitrile rubber (hardness: 80°) was coated on the outer periphery of the reinforcing layer (thickness: 5 mm), and then placed in a vulcanization can at 160°C.
Steam vulcanization was carried out for 0 minutes.

The vulcanized molded product is taken out from the vulcanization can, the iron core for molding is decentered to obtain a cylindrical molded product, and the outer shape is shredded to predetermined dimensions and polished to form rubber pieces (outer diameter 30 mm, inner diameter 18.5 mm, length). 25 mm) was obtained.

Next, the rubber control is attached to an iron core (
A rubber roller for spinning according to the present invention was obtained by fitting the rubber roller into a rubber roller having an outer diameter of 19 mm using a fitting machine.

Using the rubber roller thus obtained, the nip load was 15
Durability tests were conducted under accelerated conditions of 20 kg and 20 rpm.

The results are shown in Table 1. In addition, as comparative examples, the thickness of the internal rubber layer was 0.3 and 4. The results for Omrn are also shown.

From Table 1 above, it was found that the rubber roller for spinning according to the present invention had excellent durability.

Example 2 Aromatic polyamide cloth (Konex,
Table 2 was prepared in the same manner as in Example 1 using the registered trademark name of Music University ■.
A rubber roller shown in was obtained, and a durability test 1 was conducted in the same manner as in Example 1 using this rubber roller.

The results are calculated when the thickness of the internal rubber layer is 0.3 and 4, Q
It is shown in Table 2 together with a comparative example in mm.

From Table 2 above, it was found that the rubber roller for spinning according to the present invention had excellent durability as in Example 1.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the rubber tip and metal core of the rubber roller for spinning of the present invention, and FIG. 2 is a partially cutaway perspective view showing an embodiment of the rubber roller for spinning of the present invention. FIG. 3 is a simplified detailed diagram showing the process of forming the inner rubber layer and reinforcing material layer of the rubber roller for spinning according to the present invention. 1... Internal rubber layer, 2... Reinforcement layer,
3...External rubber layer, 4...□Metal iron core for roller, 5...Tightening allowance, 6...
Unvulcanized rubber sheet, 7... Reinforcement material, 8...
...Laminated sheet, 9...4 calendar rolls.

Claims (1)

[Scope of Claims] 1. A rubber roller for spinning, in which an inner rubber layer and an outer rubber layer are integrally formed with a reinforcing material layer interposed therebetween, and which are tightly fitted onto the outer peripheral surface of a metal core for the roller. The thickness of the internal rubber layer of the rubber tip is 0.5 to 3.0.
mm, the thickness of the reinforcing material layer is 0.1 to 0.5 mm, and the tightening of the rubber tip for tight fitting is 0.5 to LO mm with respect to the metal core. Rubber roller for wire. 2. The rubber roller for spinning according to claim 1, wherein the reinforcing material layer is a woven fabric or a mat-like material. 3. The rubber roller for spinning according to claim 2, wherein the woven fabric is made of cotton fabric. 4. A strip-shaped laminated sheet with a reinforcing material layer and an unvulcanized rubber sheet crimped together was tightly wound around a metal core for molding with the rubber layer on the inner periphery, and the outer periphery was covered with an unvulcanized rubber layer. After vulcanization, cut into a predetermined width if necessary to a thickness of 0.5 to 3. Q
, mm inner rubber layer, thickness O61~0.5 myO)
Obtaining a rubber core consisting of a reinforcing material layer and an external rubber layer,
A method for manufacturing a rubber roller for spinning, which comprises forming a rubber roller for spinning by tightly fitting the rubber tip into a metal core for a roller having a tightening margin of 0.5 to LO mm.