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Method for unwinding a sheet of yarn from a warp beam

A technology of warp beam and yarn sheet, which can be used in warp knitting, winding strip, thin material processing, etc., and can solve the problem of high cost

Active Publication Date: 2016-04-06
KARL MAYER STOLL R&D GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher costs with laser measuring devices

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for unwinding a sheet of yarn from a warp beam
  • Method for unwinding a sheet of yarn from a warp beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] figure 1 A warp beam 1 is schematically shown, which has an inner diameter D defining a coil 3 i The winding shaft core 2. Coil 3 has an outer diameter D a . Can be selected from various diameters D i 、D a Calculate the circumference. The current circumference always results from the current diameter.

[0022] The warp beam 1 is produced in that the yarn sheet is wound on a winding mandrel in a large number of loops. The warp beam 1 must rotate thousands of times during winding, so that a correspondingly large number of loops or sheet winding layers are produced on the winding core 2 .

[0023] In one embodiment, the diameter D of the winding mandrel 2 i For example, be 360mm, the diameter D of the finished coil 3 a For example, it is 860mm. At this moment, a total of 18,000 yarn sheet coils are wound on the winding shaft core 2 .

[0024] It can already be observed when the yarn sheet is wound onto the warp beam 1 that the circumference of the warp beam does...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The method involves continuously calculating rotational speed of a warp beam using rotational speed function depending on number of rotations made, an outer diameter of the full warp beam and an outer diameter of a winding core of the warp beam. The warp beam is rotated at the calculated rotational speed. The rotational speed function is formed using a linear function (6) and a correction function (7), which provides compression properties of a thread sheet. A quadratic function is used as the correction function.

Description

technical field [0001] The invention relates to a method for unwinding a sheet of yarn from a warp beam which is rotated during unwinding. Background technique [0002] For the production of textile fabrics it is in many cases necessary to provide sheets unwound from warp beams. A related example is weft knitting, in which weft yarns are threaded into sheets of warp yarns to create a fabric. Another example is warp knitting, in which the yarns of the panels are guided through the knitting zone, where they are looped to form the knitted fabric. [0003] In most cases, a uniform feed of yarn sheets is required to produce a high-quality web. If the yarn sheet is conveyed too slowly or too fast, a tension difference will be generated in the web, which will affect the quality of the web. [0004] For this reason, it is generally also not possible to simply withdraw the yarn sheet from the warp beam, and the warp beam thus rotates. This creates an unfavorable tension situation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H16/10
CPCD02H11/00D03D49/10D04B27/22
Inventor S·加雷尔茨M·富尔
Owner KARL MAYER STOLL R&D GMBH