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System and method for adjusting the land channel length of an extrusion die

A technology of extrusion die and flat part, which is applied in the system field of channel length of the flat part, can solve problems such as product orientation and shrinkage, damage to processing characteristics, etc.

Active Publication Date: 2016-08-31
NORDSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this compromises processing characteristics when operating with smaller or larger die exit sizes, potentially causing problems with product orientation and shrinkage

Method used

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  • System and method for adjusting the land channel length of an extrusion die
  • System and method for adjusting the land channel length of an extrusion die
  • System and method for adjusting the land channel length of an extrusion die

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Embodiment Construction

[0018] The following detailed description is exemplary in nature and is not intended to limit the scope, applicability, or configuration of the invention in any way. The description provides practical illustrations for implementing certain preferred embodiments of the invention. Examples of configurations, materials, dimensions, and manufacturing processes are provided for selected elements; all other elements use what is known to one of ordinary skill in the field of the invention. Those of ordinary skill in the art will recognize that there are many suitable substitutions for many given examples.

[0019] The present disclosure relates to an extrusion die having a flat channel and a method for adjusting the length of the flat channel. In one embodiment, the extrusion die has a pair of die body portions providing polymer flow channels therethrough. The die body portion has a corresponding pair of die lips that form an outlet hole to a polymer flow channel. The terminal por...

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PUM

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Abstract

The invention provides a system and method for adjusting the length of a channel of a flat portion in an extrusion die. The extrusion die having an adjustable flat channel can be formed from a mold body including a first mold body portion and a second mold body portion, a first lip body, a second lip body, and a flat channel body. The extrusion die can have a flow channel that includes a flat portion channel terminating in the exit aperture. The flow channel may be defined on one side by a first mold body portion, a flat portion channel body and a first lip body. The flow channel may be defined on the opposite side by the second mold body portion and the second lip body. In some examples, the length of the channel of the flat portion may be adjusted by configuring the planar channel body and / or the first lip body to move across the width of the flow channel.

Description

technical field [0001] The present disclosure relates to extrusion dies, and more particularly, to systems and methods for adjusting the length of a flat channel on an extrusion die. Background technique [0002] Extrusion dies are used to extrude molten thermoplastic material into relatively thin films or sheets. Conventional extrusion dies have a die cavity with the general shape of a coat hanger. These extrusion dies have been commonly referred to as hanger dies. A typical hanger mold includes an inlet, an inlet manifold, a generally triangular shaped pre-flat channel, a final flat channel and a mold outlet or gap. In operation, molten polymer flows through the extrusion die from the inlet to the die outlet. The size and shape of the various channels are selected to promote uniform polymer flow across the surface of the mold and produce a thin sheet or film of desired thickness. [0003] In practice, panel manufacturers are often required to produce panels of differen...

Claims

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Application Information

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IPC IPC(8): B29C47/16B29C48/30B29C48/31B29C48/92
CPCB29C48/30B29C48/31B29C48/313B29C48/0011B29C48/08B29C48/2528B29C48/2556B29C48/3001B29C48/302B29C48/92B29C2948/92628B29C2948/92638B29C2948/92647B29C2948/92904B29L2007/00
Inventor 萨尔瓦托雷·G·尤利亚诺迈克尔·K·特拉斯科特
Owner NORDSON CORP
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