METHOD AND DEVICE FOR INFRARED WELDING OF POLYMER COMPOSITE MATERIALS

DE602023018046T2Active Publication Date: 2026-06-03LUXEMBOURG INSTITUTE OF SCIENCE AND TECHNOLOGY (LIST)
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
LUXEMBOURG INSTITUTE OF SCIENCE AND TECHNOLOGY (LIST)
Filing Date
2023-04-28
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Infrared welding techniques struggle with materials having high heat conductivity, such as carbon-fibre reinforced thermoplastics (CFRTP), leading to non-homogeneous thermal gradients, amorphous structures, and poor bonding quality due to rapid cooling and heat dispersion into tools.

Method used

A system and method involving movable infrared heating means and screens that create an air gap around the heated portions of CFRTP workpieces, combined with pre-heating and controlled pressure application, to achieve homogeneous temperature distribution and controlled crystallization.

Benefits of technology

Enables high-quality bonding of CFRTP workpieces with reduced thermal gradients, faster processing, and improved crystallization rates, resulting in robust products with minimal porosity and no need for post-curing.

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