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Oscillator rollers

A technology of stringing ink rollers and roller cores, which is applied in the field of manufacturing rigid rollers, can solve the problems of preventing effective heat dissipation of cloth ink rollers, and achieve the effects of good ink acceptance, effective heat dissipation, and high wear resistance

Active Publication Date: 2012-09-19
FELIX BOTTCHER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coatings that are too thick prevent effective heat dissipation from the surface of the ink distribution roller

Method used

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  • Oscillator rollers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A solution of polyamic acid was applied to the steel core by thin film spin coating. The material was heated under rotation so that most of the solvent evaporated. This keeps the coating composition stable after the spin is over. Subsequently, the rolls are annealed at a maximum of 250°C. Printing experiments with this roll provided very good results.

Embodiment 2

[0051]In the method of Example 1, a steel core having a roughness Rz of 15 μm was used. After coating according to Example 1 at a thickness of 80 μm, an Rz of about 2.2 μm remained on the surface. After coating at a thickness of 30 μm, Rz is about 5 μm, ie the roughness of the coating can be adjusted by choosing the coating thickness.

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Abstract

Use of a rigid roller obtainable by a method comprising the steps: providing a roller core, applying a liquid coating composition based on a polyimide or polyamide-imide prepolymer with a layer thickness of 1 to 1000 [mu]m, and solidifying the liquid coating composition on the roller core as a oscillator or Rilsan roller.

Description

technical field [0001] The present invention relates to a method of manufacturing a rigid roll, a rigid roll and applications thereof. Background technique [0002] Lithography remains the dominant technique among printing methods. This technique is an indirect printing method used in newspapers, magazines, catalogs, and newspaper printing, among others. In lithography, a printing plate is prepared, usually a thin aluminum plate. The printing plate is held under tension against the plate cylinder and in contact with the printing press's inking and damping system. The oleophilic areas of the printing plate accept printing ink, while the hydrophilic areas remain free of ink. [0003] The printing plate is transferred from the plate cylinder to a printing blanket mounted on a blanket cylinder or plate cylinder. The blanket cylinder then transfers the ink to the media to be printed on by means of an impression cylinder or another blanket cylinder. [0004] In order to form ...

Claims

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Application Information

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IPC IPC(8): B41N7/00B41N7/04B41N7/06
CPCB41N7/04B41N7/005B41N7/06B41N2207/02B41N2207/14B41F31/14B41F31/00B41F31/26B41F31/002
Inventor 格哈德·巴尔切乌维·泽特尔亨德里克·安索格西尔克·戈洛布比尔吉特·弗林斯
Owner FELIX BOTTCHER GMBH & CO KG
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