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Nonlinear rolling tension control process

A tension control, non-linear technology, applied in the direction of winding strips, thin material handling, transportation and packaging, etc., can solve the problems that the tension control method is not very suitable, the winding effect cannot meet the technical requirements, etc. The roll effect is improved, the pass rate is improved, and the winding effect is neat

Active Publication Date: 2008-11-19
SHAANXI BEIREN PRINTING MACHINERY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The tension attenuation and roll diameter increase of the current winding tension control system is a linear relationship, and the relationship between tension and roll diameter varies with the slope K of the straight line equation. 1 The value varies with each other, but for the winding of some composite materials such as oriented polypropylene (film, referred to as OPP), polyethylene terephthalate (film, referred to as PET), polyethylene (film, referred to as PE), etc. Tension control, this linear tension control method is not very suitable, and the winding effect cannot meet the technical requirements, which will bring many quality problems to the subsequent process

Method used

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  • Nonlinear rolling tension control process
  • Nonlinear rolling tension control process

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Embodiment

[0039] As shown in Table 1, four kinds of materials are selected, and the initial winding data of the four groups of materials are respectively set, and then their respective functional expressions are obtained from the functional relationship (5) between tension and winding diameter, and each group of materials is obtained Corresponding Tension vs. Coil Diameter Curves image 3 , Figure 4 , Figure 5 and Figure 6 .

[0040] Table 1 sets the initial data for the four materials

[0041] group

material type

D. 0 (mm)

f 0 (kg)

K

First group

PET

200

40

0.2

Second Group

OPP

300

30

0.4

The third group

PE

400

25

0.5

Fourth group

Aluminum foil and PE

composite material

500

20

0.8

[0042] The first set of expressions: F = 40 [ 1 - 0...

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Abstract

The invention discloses a non-linear rolling-up tension control method, which comprises the following steps: in the printing and rolling-up process, selecting the value of a tension taper coefficient K in a range of 0 to 1 based on different requirements of POP, OPP, PE and other composite materials, setting an initial tension F0 and an initial rolling-up diameter D0, calculating the value of real-time outputted tension F based on the real-time variation of the rolling-up diameter D in accordance with the function formula F=F0(1-K(1-D0 / D)), and controlling a rolling-up device to adjust the rolling-up tension in time. The inventive rolling-up tension control method is suitable for PE, OPP, POP and other composite materials; and has the advantages of good rolling-up quality, tidy rolling-up, remarkably improved qualification rate of printed finished product, and improved production efficiency.

Description

technical field [0001] The invention belongs to the technical field of printing machinery and relates to a nonlinear winding tension control method. Background technique [0002] In the entire printing process, the winding tension is used to control the curling effect of the post-printing product. In the general curling process, the tension needs to be reduced with the increase of the roll diameter to prevent damage to the roll and inner looseness during the winding process. The outer tight cabbage phenomenon will also bring troubles and difficulties to the subsequent process, so the winding tension control is a very important link in the entire printing process. The tension attenuation and roll diameter increase of the current winding tension control system is a linear relationship, and the relationship between tension and roll diameter varies with the slope K of the straight line equation. 1 The value varies with each other, but for the winding of some composite materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H23/195B65H23/04B65H77/00
Inventor 谢军武张晓锋田峰
Owner SHAANXI BEIREN PRINTING MACHINERY
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