# PREFORM TECHNOLOGY: A NECESSARY REQUIREMENT FOR QUALITY CONTROLLED LCM-PROCESSES

> Title: PREFORM TECHNOLOGY: A NECESSARY REQUIREMENT FOR QUALITY CONTROLLED LCM-PROCESSES Page Range: p.605-622 Author(s): Mitschang P; Ogale A; Schlimbach J; Weyrauch F; Weimer C File size: 749K Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal: Polymers and Polymer Composites Issue...

Canonical URL: https://polymerjournals.com/preform-technology-a-necessary-requirement-for-quality-controlled-lcm-processes/
Published: 2003-08-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: PREFORM TECHNOLOGY: A NECESSARY REQUIREMENT FOR QUALITY CONTROLLED LCM-PROCESSES**
 Page Range: p.605-622
 Author(s): Mitschang P; Ogale A; Schlimbach J; Weyrauch F; Weimer C
 File size: 749K
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc11-8&JournalID=100108&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 11
 Issue No: No. 8

**Abstract**
 This article discusses the need to use preform techniques to produce qualified and manageable reinforcements as a requirement for further steps in the development of liquid composite moulding (LCM) processes. The definition and philosophy of the 'sew 'n' cut' technique based on tailored reinforcements shows an alternative to direct preform technologies. The importance of selecting adequate thread construction and properties, such as elastic behaviour in order to minimise the influence on ellipse generation and the in-plane properties of the reinforcement are examined. Based on such performs, the control of the LCM process is shown to be possible. Different concepts to realise a controlled injection are discussed,and the decision-tree-concept is described in detail and verified by controlling the race-tracking effect. A critical preforming effort is defined whereby a further increase in preforming activities will nullify the expected cost advantages. 59 refs.

---