Apparatus on a spinning preparation machine, especially a flat card, roller card, or the like, for adjusting the carding clearance

Abstract

An apparatus is provided on a spinning preparation machine for adjusting the carding clearance. A clothed roller has a cylindrical peripheral surface and a cladding facing and spaced therefrom, wherein between the peripheral surface of the roller and a part of the cladding there is a carding region with a carding clearance where carding work is performed and carding heat is generated, heat leading to an alteration across the width of the machine in the contour of at least one of the components lying opposite each other. In order in simple manner to allow a uniform carding clearance under different production and processing conditions, the carding clearance can be made smaller by external energy input to at least one of the components facing each other and/or can be enlarged by throttling the energy input and the energy input.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic side view of a flat card with a heating device according to the invention;

FIG. 2 shows a cutout from a side panel with an extension bend section, on which a heating device according to the invention and a stationary carding element are mounted;

FIG. 3 is a plan view of a partial section through the cylinder of the flat card of FIG. 1 and of the supporting profile arranged across the working width with heating units in the edge regions of the cylinder;

FIG. 4 a shows the convexly curved casing of a carding cylinder across the working width with a convexly curved contour resulting from carding heat without external energy input;

FIG. 4 b shows the flat (straight) casing of the cylinder of FIG. 4a with a flat (straight) contour after external energy input;

FIG. 5 shows schematically a block circuit diagram with an open loop and closed loop control device to which four controllable heating devices and four temperature sensors of a device according to the invention are connected; and

FIG. 6 shows a further embodiment in which the carding cylinder is generally as in FIG. 3, but in which heating devices are arranged across the entire working width, in particular for the uniform alteration of the carding gap across the working width.

Claims

1. An apparatus on a spinning preparation machine for adjusting a carding clearance, in which a clothed roller is opposed to one or more machine elements, defining between the clothing of the clothed roller and said one or more machine elements an adjustable carding clearance where, in operation, carding is effected and carding heat is generated, and the contour of at least one of the clothed roller and at least one said opposed element is alterable in response to heat, wherein the apparatus comprises a device for input of energy to at least one of said roller and at least one said opposed element, in which the carding clearance can be made smaller by the input of energy to said at least one of said roller and at least one said opposed element and/or can be enlarged by throttling of said input of energy.

2. An apparatus according to claim 1, in which the energy input and/or throttling of the energy input is arranged to increase towards the edge regions of the roller and/or said opposed machine element.

3. An apparatus according to claim 1, in which the energy input and/or throttling of the energy input is effected uniformly across the width of the machine.

4. An apparatus according to claim 1, wherein said device for providing said input of energy comprises a heating device.

5. An apparatus according to claim 1, in which the roller is the cylinder of a flat card or roller card and said at least one opposed element comprises a clothed carding element.

6. An apparatus according to claim 5, in which said at least one opposed component comprises one or more devices selected from separating blades, guide elements and clothed rollers.

7. An apparatus according to claim 1, in which the at least one opposed element comprises a clothed element and at least one of the clothed roller and clothed element opposed thereto is heated by energy input.

8. An apparatus according to claim 1, which is operable to adjust the carding clearance during operation of the spinning preparation machine.

9. An apparatus according to claim 2, which is arranged to effect substantially no energy input in the middle region of the at least one of the clothed roller or opposed element into which energy is input.

10. An apparatus according to claim 1, in which the at least one component comprises two or more zones in which the energy input is separately controllable.

11. An apparatus according to claim 1, in which a heating device is associated with a said opposed element.

12. An apparatus according to claim 11, in which said one or more opposed elements comprise a multiplicity of clothed elements opposed to the clothed roller, and there is a heating device associated with each of two or more said clothed elements.

13. An apparatus according to claim 1, in which a heating device is associated with the surface of the roller.

14. An apparatus according to claim 4, in which the heating device has a heat output which is variable across the working width.

15. An apparatus according to claim 4, in which the heating device is an electrical heating device.

16. An apparatus according to claim 4, in which the heating device is an inductive heating device comprising a controllable electrical power circuit for adjusting the heat induced.

17. An apparatus according to claim 4, in which the heating device is arranged in a carrier arrangement comprising an aluminium profiled member.

18. An apparatus according to claim 17, in which a plurality of covering or work elements (modules) of corresponding dimensions are present at the roller, and the dimensions of the carrier arrangement over the length and width and are the same or substantially the same as those of a said covering element or work element (module) whereby the carrier arrangement including said heater is interchangeable with a said covering or work element.

19. An apparatus according to claim 1, further comprising one or more temperature sensors for detecting the temperature of at least one of said roller and opposed component and a control device for adjusting the energy input device in dependence upon temperature values detected by said one or more sensors.

20. An apparatus according to claim 5 in which the roller carding cylinder consists of a ferromagnetic material.