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Method and tool for embossing

A technology of embossing and mould, applied in the field of embossing and mould.

Pending Publication Date: 2021-03-30
TCTECH SWEDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One problem with this production method and mold is how to improve yield in terms of finished product meeting quality requirements

Method used

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  • Method and tool for embossing
  • Method and tool for embossing
  • Method and tool for embossing

Examples

Experimental program
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Embodiment Construction

[0014] The present disclosure relates to a method and die for embossing plastic sheet. An example of an embossing embossing die is shown in WO-2013 / 002703-A1. Such molds can be used, for example, to produce so-called lightguide plates (LGP) for graphic display devices and televisions.

[0015] figure 1 The embossing die 1 is schematically shown. The mold has an upper mold half 3 and a lower mold half 5, and during a part of the process cycle, a plastic sheet blank 7 is pressed with great force, and by means of an upper mold 11 and a lower mold 13, it is possible to press on one or the other of the blank. Fine patterns are embossed on both surfaces. Blanks may optionally be fed from a blank roll 9 as shown. The pressing can be made more efficient by heating the surfaces in contact with the blank 7 (ie the dies 11 , 13 ) during pressing by means of a heating device comprising a coil 15 . Furthermore, in a subsequent stage, the same surfaces can be cooled by cooling means 17...

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PUM

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Abstract

The present disclosure relates to a method for embossing a plastic sheet and a corresponding tool (1). The plastic sheet is pressed between first and second tool halves (3, 5) while being heated suchthat a pattern is imprinted on first and second faces (19, 21) of the plastic sheet. Reference marks (31, 33) are imprinted on both faces of the plastic sheet and the embossed plastic sheet is evaluated optically to determine error data based on the relative position of the first and second reference marks. This allows to adjust the embossing tool based on the error data for subsequent embossing operations.

Description

technical field [0001] The present disclosure relates to a method for embossing a plastic sheet between a first mold half and a second mold half, wherein the plastic sheet is pressed and heated between the mold halves while a pattern is embossed on the plastic sheet First and second sides. Background technique [0002] Such methods and molds are eg described in WO-2013 / 002703-A1, where so-called lightguide plates (LGP) are produced by embossing fine patterns onto thin transparent plastic sheets, eg using actively heated molds. [0003] A problem with this production method and mold is how to improve the yield in terms of finished product meeting the quality requirements. Contents of the invention [0004] It is therefore an object of the present disclosure to provide an embossing method and die which provide improved throughput. This is obtained by the embossing method defined in claim 1 . More specifically, in the initially mentioned method at least a first reference m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/02B29C43/00
CPCB29C59/02B29C43/58B29C2043/5833B29C2043/5825B29C43/021B29C43/52B29L2011/0075B29C59/002B29D11/00663
Inventor 简·耶德尔贝格
Owner TCTECH SWEDEN