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8. Preform die
The material is shaped in the die, or to be more precise, "preformed", since the width and air gap of the lips leaving the die are always greater than those of the finished sheet, which is then stretched and cut.
Sheets or plates are semi-finished products cut to order or thermoformed. Their market is not governed by any structuring standard as may be the case in other markets (standardized diameters-thicknesses for tubes in construction and industry): it is the characteristics of the thermoforming or printing machines that impose the width-thickness values.
For an extrusion line with in-line thermoforming, the die is monolaize, as the extrusion capacity has to match the output of the thermoforming equipment. In all other cases, the aim is for the extrusion line to operate at maximum productivity, which means choosing the widest possible...
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Preform die
Calender-drawing
Bibliography
Software tools
Contour TM Die (EDI)
BEMflow, Boundary Element Fluid and Heat Transfer Simulation Program
Inverted preland Die (Cloeren)
Websites
Octal
Rauwendall
The Madison Group
Verbruggen...
Standards and norms
- Management environnemental. Exigences et lignes directrices pour son utilisation. - ISO 14000 - Nov. 2004
- Food safety management systems – Requirements for all organisms in the food chain. - NF EN ISO 22000 - Oct. 2005
Directory
Manufacturers – suppliers (non-exhaustive list)
Robert Barr, Inc.
HPM
Extrusion Dies Industry, LLC
Statistical and economic data
Figure 1 compares the performance of two equivalent systems in terms of instantaneous available flow:
1 production unit, 1,300 kg/h, investment value €1.5 M ;
2 production units...
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