Product category:
Machinery and Production Equipment
News Release from: Guyson International | Subject: Die and billet cleaning equipment
Edited by the Engineeringtalk Editorial
Team on 19 May 2003
Dirty billets cause problems for
extruders
Today's systematic approaches to product quality help us discover what is at the root of certain variations in extrusion, and then identify the most effective ways to prevent them.
Today's systematic approaches to product quality help us discover what is at the root of certain variations in extrusion, and then identify the most effective ways to prevent them Inevitably, in many cases, the quest for process integrity draws attention to the subject of dirt
This article was originally published on Engineeringtalk on 8 Mar 2001 at 8.00am (UK)
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Problems with dirty billets will be vary greatly for an individual extruder depending on the sources of their raw material, how it is transported, handling practices and storage conditions.
The degree of concern with this issue may also depend on the end-use of the extrusions and the quality standards to which they are held.
Certainly, highly engineered shapes and profiles that must meet stringent customer specifications will dictate more exacting guidelines for cleanliness.
The idea of cleaning billets or logs before extrusion is not a new one.
Many people have been doing it for years on a selective basis, when they notice particularly soiled ones.
The suggestion that 100% of the billet-stock should be thoroughly washed prior to extrusion is based on the idea that this procedure can completely eliminate one suspected source of variation in product quality.
There are additional benefits, as well, in preventing foreign matter from passing through the dies.
If a quality control assessment leads to the conclusion that dirty billets are a problem in an operation, it is a good idea to partner with a washer manufacturer who understands the special requirements of extruders.
Such a supplier can assist with the development of verifiable cleanliness specifications and will be in the best position to offer a cleaning system that is customised to suit the circumstances.
This is an extract from an article written by JC Carson - Leader on the Applications Team of the New York manufacturer of die and billet cleaning equipment - Guyson Corp, part of Guyson International.
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