JPH05321927A - Roller - Google Patents

Abstract

PURPOSE:To prevent peeling of an outer circumferential elastomer layer by stopping an intermediate resin layer on an outer circumference of an inner circumferential member comprising a core metal or a bearing directly or indirectly, and binding an outer circumferential elastomer layer on its outer circumference by chemical reaction. CONSTITUTION:A roller 1 comprises an intermediate resin layer 3 on the outer side of a core metal 2 as an inner circumferential member, and an outer circumferential elastomer layer 4 on the outer side of it. For preventing removal of the intermediate resin layer 3 from an outer circumferential part of the core metal 2, the intermediate resin layer 3 is protruded radially inward at each end of a shaft, having a circumferential flange part 3 applied to a side surface of the core metal 2. For binding the outer circumferential elastomer layer 4 and the intermediate resin layer 3 to each other, chemical reaction at the time of moulding is used. For example, in case of using epoxy resin, phenol resin, etc., for the intermediate resin layer 3, and two-liquid reaction type urethane elastomer for the outer circumferential elastomer layer 4, a layer of urethane is moulded on an outer circumference of the intermediate resin layer on the way of hardening reaction of it, so both react with each other to be bound to each other and be integrated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rollers having an inner peripheral member composed of a cored bar or a bearing, and an outer peripheral elastomer layer provided outside the inner peripheral member.

[0002]

2. Description of the Related Art Conventionally, as a roller, it is known to provide an elastomer layer on the outer periphery of a cored bar or bearing. In such a roller, usually, an elastomer uses an adhesive on the outer peripheral surface of the cored bar or bearing. Are joined together.

[0003]

Therefore, when a high load is applied during the use of the roller, a peeling phenomenon may occur at the adhesive portion between the two layers, resulting in an early life. Therefore, the allowable load value that is the performance of the roller is not determined by the material of the elastomer, but is determined by the adhesive performance of the adhesive under the present circumstances.

An object of the present invention is to provide rollers which have improved adhesion performance and a long life.

[0005]

The present invention is premised on rollers having an inner peripheral member composed of a cored bar or a bearing, and an outer peripheral elastomer layer provided outside the inner peripheral member.

According to the present invention, an intermediate resin layer is directly or indirectly engaged with the outer periphery of the inner peripheral member, and an outer peripheral elastomer layer is bonded to the outer periphery of the intermediate resin layer by a chemical reaction.

[0007]

The intermediate resin layer is directly or indirectly engaged with the outer periphery of the inner peripheral member, and the outer peripheral elastomer layer is bonded to the outer periphery of the intermediate resin layer by a chemical reaction, so that the outer peripheral elastomer layer does not peel off.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

In FIG. 1 showing the overall structure, 1 is a roller, and an intermediate resin layer 3 is provided on the outer side of a core metal 2 which is an inner peripheral member
Outer peripheral elastomer layers 4 are provided outside the intermediate resin layer 3, respectively.

It is not necessary to bond the intermediate resin layer 3 and the core metal 2 with an adhesive, and the shape of the intermediate resin layer 3 is configured so that the intermediate resin layer 3 does not come off from the outer peripheral portion of the core metal 2. That is, the intermediate resin layer 3 is provided at both ends in the axial direction with the circumferential flange portion 3 protruding inward in the radial direction and abutting on the side surface of the core metal 2.
a, 3a.

On the other hand, the outer peripheral elastomer layer 4 and the intermediate resin layer 3 need to be firmly bonded, but this bonding does not necessarily require the use of an adhesive, and the intermediate resin layer 3 or the outer peripheral elastomer layer 4 is molded. The chemical reaction at the time may be used. Specifically, when an epoxy resin, a phenol resin or the like is used for the intermediate resin layer and a two-component reaction type urethane elastomer is used for the outer peripheral elastomer layer, the intermediate resin layer may be cured during the curing reaction (temporarily solidified). If a urethane layer (outer peripheral elastomer layer) is formed on the outer periphery of the urethane layer, both react with each other and are bonded and integrated.

When an epoxy resin, a phenol resin, or a resin in which an inorganic filler such as glass fiber is mixed is used for the intermediate resin layer and a two-component reaction type urethane elastomer is used for the outer peripheral elastomer layer, After completely reacting the intermediate resin layer, if the outer peripheral elastomer layer is formed on the outer periphery of the intermediate resin layer, the active groups such as hydroxyl groups in the resin or the glass fiber or the like react with the elastomer, whereby the two are bonded. Unify.

When a thermoplastic material is used for the intermediate resin layer and the outer peripheral elastomer layer, if the materials used for both layers have similar compositions (for example, nylon-amide type TPE and polyester-ester type TPE), heat fusion by two-layer molding is performed. It is integrated by wearing.

By doing so, a higher bonding force can be obtained and manufacturing is easier than in the conventional case where the outer peripheral elastomer layer is bonded to the core metal with an adhesive.

Various resins and elastomers can be used for the intermediate resin layer 3 and the outer peripheral elastomer layer 4 as described above. The molding method is as follows:
The intermediate resin layer 3 / outer peripheral elastomer layer 4 may be formed directly on the core metal 2 depending on the means for bonding the cores, or the intermediate resin layer 3 / outer peripheral elastomer layer 4 may be formed separately from the core metal 2. Alternatively, a cored bar may be fitted into the molded product later.

Next, a method for manufacturing the above roller will be described.

First, an epoxy resin layer (intermediate resin layer) having a layer thickness of 5 mm is formed on the outer periphery of a core metal having an outer diameter of 170 mm and a width of 50 mm.

Specifically, as shown in FIG. 2, the cored bar 2 and the mold 11 to which it is applied are heated to 110.degree. The mold 11 includes an upper mold 11A, an outer mold 11B and a lower mold 11C.
The lower die 11C is formed with a convex portion 11a that fits into the center hole 2a of the cored bar 2. In addition, in FIG.
L1 = 170 mm and L2 = 180 mm.

On the other hand, Epicort 828 (made by Yuka Shell) 1
00 parts by weight to 70 ° C., diaminodiphenylmethane 20
Part by weight is heated to 120 ° C. and mixed and stirred. Then, the mixed epoxy resin is cast into the annular space 13 between the core metal 2 and the mold 11. The inner surface of the outer mold 11B was surface-treated with a so-called fluororesin.

After the casting, the epoxy resin changes from a liquid state to a solid state, and an intermediate resin layer 3 which is an epoxy resin layer is formed.

Then, a 5 mm outer peripheral elastomer layer is formed on the outside of the intermediate resin layer 3. That is, as shown in FIG. 3, a cored bar 2 on which an intermediate resin layer 3 is formed and a mold 12 to which it is applied (consisting of an outer mold 12A and a lower mold 12B).
Is heated to 110 ° C.

On the other hand, Hyprene L-100 (manufactured by Mitsui Toatsu) 1
00 parts by weight to 90 ° C. and diaminodichloromenthane 19
Part by weight is heated to 120 ° C. and mixed and stirred. Then, the mixed epoxy resin is cast into the annular space portion 14 between the mold 12 and the intermediate resin layer 3 bonded to the core metal 2.

Thereafter, heating is performed at 110 ° C. for 12 hours,
The desired roller is created.

Next, the results of an evaluation test of the adhesive strength and life of the present firing example manufactured by the above method will be described. The comparative example has an outer diameter of 180 mm and a width of 50.
mm core metal is sandblasted, washed with trichloroethane, and then Chemlok 218 (made by Road Far East Co.)
Was applied and dried. After that, a 5 mm-thick outer peripheral elastomer layer made of the same material as that of the example of the present invention was molded in the same procedure to prepare a roller.

The test roller according to the present invention example measured the 180 ° peeling adhesive force between the intermediate resin layer / outer peripheral elastomer layer and the test roller according to the comparative example measured between the core metal / outer peripheral elastomer layer.

Further, as shown in FIG. 4, the load F = 110.
The pressing roller -21 was applied to the test roller 22 rotated at a speed of 50 m / min with 0 kgf, and a running test was conducted for 500 hours or until the break.

The test results are shown in Table 1 below.

[0028]

[Table 1] From the results shown in Table 1, it can be seen that the inventive examples are superior in both adhesive strength and running life.

In the above-described embodiment, the intermediate resin layer and the outer peripheral elastomer layer are directly molded on the core metal. However, in addition to the roller 31 shown in FIG. The metal fittings 35 may be applied to the side surfaces of the intermediate resin layer 34 to which the layer 33 is bonded to bond them. Further, instead of the core metal, a bearing 42 is used like the roller 41 shown in FIG. 6, and the intermediate resin layer 43 and the outer peripheral elastomer layer 4 are provided on the outer periphery of the bearing 42.
4 may be provided.

[0030]

As described above, according to the present invention, the intermediate resin layer is directly or indirectly locked to the outer periphery of the inner peripheral member, and the outer peripheral elastomer layer is bonded to the outer periphery of the intermediate resin layer by a chemical reaction. Therefore, the adhesive force of the outer peripheral elastomer layer is increased, the outer peripheral elastomer layer is not peeled off, and the durable life is extended.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of a roller.

FIG. 2 is an explanatory diagram of a manufacturing method.

FIG. 3 is an explanatory diagram of a manufacturing method.

FIG. 4 is an explanatory diagram of a test method.

FIG. 5 is a vertical sectional view of a roller of another embodiment.

FIG. 6 is a vertical sectional view of a roller according to still another embodiment.

[Explanation of symbols]

 1 roller 2 core metal 3 intermediate resin layer 4 outer peripheral elastomer layer

Claims (1)

[Claims] 1. A roller having an inner peripheral member made of a core metal or a bearing and an outer peripheral elastomer layer provided outside the inner peripheral member, wherein an intermediate resin layer is directly provided on the outer periphery of the inner peripheral member. Alternatively, rollers which are indirectly locked and have an outer peripheral elastomer layer bonded to the outer periphery of the intermediate resin layer by a chemical reaction.