JPH07207532A - Pressure roller used for spinning preparative machine - Google Patents

Abstract

PURPOSE: To provide a pressure roller from the peripheral surface of which static electricity is discharged to prevent fiber-lapping-up during operation. CONSTITUTION: The pressure roller for spinning preparing machine moves fibers cooperating with a counter roller 5. The pressure roller is constituted of a bearing journal 2 consisting at least partially of metal, a roller core 1 at the both end of which is supported by the bearing journal, a cover layer 3 of elastic material such as silicone plastic provided on the peripheral surface of the roller core and a coating body 4 which consists of soil resistant and abrasion resistant plastic such as polytetrafluoroethylene to which chalk powder is added and formed on the peripheral surface of the cover layer. Electrically conductive materials of metallic powder and/or graphite powder, etc., are added to the cover layer 3 and coating body 4 in a finely distributed state and electrically conductive element 6 is placed on the peripheral surface of the coating body 4 to discharge static electricity generated on the surface of the pressure roller during operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure roller for use in a spinning preparation machine, the pressure roller cooperating with an opposing roller for moving a fiber material. And a cover layer made of a rubber-elastic material applied to the roller core.

[0002]

BACKGROUND OF THE INVENTION Pressure rollers of this type are commonly used at various locations in spinning preparation machines, such as combing and drafting machines. The pressure rollers cooperate with driven counter rollers provided on the machine to move the fibrous material, for example a fleece-shaped fibrous material. In this case, there is always the risk that the fibers will wrap around the pressure roller from the fibrous material. When the fibers wind around the pressure roller,
There is a risk that the machine will break down or stop. Furthermore, this leads to uneven spots, especially at the edges of the fibrous material. The danger of wrapping around the pressure roller is
It is amplified by the electrostatic charge and the contamination on the peripheral surface of the pressure roller that occurs over time.

Some improvement can be achieved by applying a suitable lacquer to the peripheral surface of the pressure roller. However, general-purpose lacquer coatings have an inadequate life. That is, the pressure roller must already be polished after a relatively short run time and lacquered again.

[0004]

SUMMARY OF THE INVENTION The object of the invention is therefore to improve a pressure roller of the type mentioned at the outset in such a way that the risk of winding formation during operation is permanently reduced. Is to provide a roller.

[0005]

In order to solve this problem, in the constitution of the present invention, the conductive material is added in a finely distributed state at least in the range of the peripheral surface of the cover layer. did.

[0006]

According to the invention, the finely divided electrically conductive material, for example metal powder and / or graphite powder, serves to derive the electrostatic charge from the peripheral surface of the cover layer of the pressure roller.

The electrically conductive material may be distributed throughout the rubber-elastic material of the cover layer of the pressure roller.

In an advantageous configuration of the invention, the peripheral surface of the cover layer supports the covering. The coating consists of a stain-proof and abrasion-resistant plastic, in particular polytetrafluoroethylene, which contains a finely divided, electrically conductive material. Such a covering is preferably flexible and has a smaller thickness than the cover layer made of a rubber-elastic material, for example about 0.5 mm to 1 mm. In order to be able to conduct an electrostatic charge from the coating to the machine frame, said coating can be in conductive connection with a bearing jar that is carried by the roller core. The bearing journal is at least partially made of metal. When the entire roller core including the integrally formed bearing journal is made of metal, the rubber-elastic material of the cover layer also contains the finely-divided conductive material so that the conductive connection can be achieved. Can be formed. Alternatively, it is also possible to cover the end face of the cover layer with the cover inwardly until it reaches the peripheral surface of the bearing journal. The latter type of conductive connection, that is, the type in which the end surface of the cover layer is covered with the cover can be used even when the roller body is not made of metal (for example, in the case of fiber composite material). in this case,
The bearing journal may consist of metal or at least have a metal-coated peripheral surface. Further, in order to derive the electrostatic charge from the cover (or the peripheral surface of the cover layer made of a rubber elastic material), a conductive element that contacts the peripheral surface of the cover (or the cover layer), such as a rotatable element, can be used. Alternatively, a metal roller or a metal stripper may be used.

[0009]

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

The pressure rollers shown in the drawing are roller cores 1 respectively.
The roller core 1 supports the bearing journal 2 at both ends thereof. The bearing journal 2 may be formed integrally with the roller core 1 or may be inserted into the roller core 1. On the peripheral surface of the roller core 1,
A cover layer 3 made of rubber-elastic material is arranged. The cover layer 3 supports the cover 4 on its peripheral surface,
This covering 4 is made of a stain-proof and abrasion-resistant plastic, preferably polytetrafluoroethylene ("Teflon").

This pressure roller is used in a spinning preparation machine (not shown), for example, in a comber or draft device in which a pressure roller and a counter roller 5 cooperate with each other. The counter roller 5 is rotatably and drivably supported by a frame (not shown) of the machine. The pressure rollers 1, 2, 3, 4 are pressed downward by the loading device (not shown) against the counter roller 5, so that the fiber material to be moved by the rotation of the counter roller 5, for example, the fiber fleece, is not moved. Tightened against 5.

In order to prevent as much as possible an electrostatic charge which, during operation, can cause the fibers to wind around the pressure roller from the fibrous material, the covering 4 is made of a conductive material, for example metal powder and / or graphite powder. In a finely divided state.

In the embodiment of FIG. 1, the covering 4 is electrically conductively connected to a bearing journal 2 which is at least partially made of metal. This allows the generated electrostatic charge to be introduced into the frame of the machine. This conductive connection can be formed, for example, as follows. That is, the end surface of the cover layer 3 and the end surface of the roller core 1 also have a conductive coating, and this coating connects the coating 4 and the peripheral surface of the bearing journal 2. The bearing journal 2 is usually made entirely of metal. However, the bearing journal may also consist of another material, for example a fiber composite material, and only its peripheral surface may be coated with metal.

The roller core 1 can likewise be manufactured from metal. In that case, the electrically conductive connection from the covering 4 to the bearing journal 2 may be formed by the cover layer 3 made of a rubber-elastic material also containing a finely distributed electrically conductive material. .

In the modified embodiment of the pressure roller according to the present invention, the cover 4 of the cover layer 3 is unnecessary. For this purpose, the rubber-elastic material of the cover layer 3 itself contains a finely divided conductive material. The cover layer 3 thus consists, for example, of a silicone plastic, in particular a silicone rubber, in which the metal powder and / or the graphite powder are finely distributed.

In the embodiment shown in FIG. 2, the covering 4
A rotatable metal roller 6 is in contact with the peripheral surface of the. This roller 6 derives an electrostatic charge from the cover 4 to the machine frame.

In the variant shown in FIG. 3, for the same purpose, a metal stripper 7 is arranged instead of the roller 6 of FIG. 2 in contact with the peripheral surface of the covering 4.

In order to improve the operating characteristics, the coating 4
(Or the cover layer 3) may be further mixed with another additive, especially chalk powder.

[Brief description of drawings]

FIG. 1 is a perspective view of a pressure roller according to the present invention.

FIG. 2 is a perspective view of another embodiment of the present invention.

FIG. 3 is a perspective view of yet another embodiment of the present invention.

[Explanation of symbols]

 1 Roller Core 2 Bearing Journal 3 Cover Layer 4 Cover 5 Opposed Roller 6 Roller 7 Stripper

Claims (10)

[Claims] 1. A pressure roller for use in a spinning preparation machine, said pressure roller adapted to cooperate with an opposing roller (5) for moving a fibrous material, said roller core (1). And a cover layer (3) made of a rubber-elastic material attached to the roller core (1), the conductive material is provided at least in the range of the peripheral surface of the cover layer (3). A pressure roller for use in a print preparation machine, characterized in that the above material is added in a finely divided state. 2. The pressure roller according to claim 1, wherein the conductive material is metal powder and / or graphite powder. 3. The cover layer (3) has a peripheral surface supporting a covering (4), the covering (4) containing a finely distributed electrically conductive material. The pressure roller according to 1 or 2. 4. A pressure roller according to claim 3, wherein the covering (4) is in contact with the electrically conductive element (6; 7). 5. The electrically conductive element (6; 7) comprises:
The pressure roller according to claim 4, which is mounted on a peripheral surface of the covering body (4). 6. The roller core (1), wherein the covering (4) is
4. An electrically conductive connection to a bearing journal (2), which is carried by and is at least partly made of metal.
The pressure roller described. 7. A pressure roller according to claim 3, wherein the covering (4) is made of stain-proof and abrasion-resistant plastic. 8. The conductive material is contained in a finely distributed rubber-elastic material of the cover layer (3).
The pressure roller according to claim 1. 9. A pressure roller according to claim 8, wherein the rubber-elastic material of the cover layer (3) is silicone plastic. 10. The pressure roller according to claim 3, wherein chalky powder is added to the coating body (4).