GMW18042

Description / Abstract: GMW18042, 1st Edition, June 2018 - Procedure for Rating Weld Quality of Sonically Welded Plastic Parts

Introduction

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. This qualitative test procedure is used to evaluate sonically welded plastic parts. The purpose of the rating scale is to allow comparison between test plaques and vehicle components to provide consistency between personnel. It is important to recognize that rating sonic welds involves perception of an objectionable surface and much of the judgment is subjective. In developing the sonic weld scales, an attempt has been made to provide some objective measures that will guide subjective judgment.

Applicability. Typical assemblies include sonically welded spoilers, appliques, wheel opening moldings, rocker moldings, body side moldings, mud guards, fascias with welded Side Blind Zone Alert (SBZA) brackets1, etc.

Remarks. Plastics include semi-crystalline and amorphous thermoplastics.