Standard No.:	QC/T 29017-1991
Chinese Name:	汽车模制塑料零件未注公差尺寸的极限偏差
English Name:
Professional Classification:	QC Professional Standard - Automobile
Issued by:
Issued on:
Implemented on:
Status:	VALID
Language:	English
File Format:	PDF
Word Count:
Price(USD):	please email coc@codeofchina.com for quotation
Delivery:	via email in

1 Content and scope

This standard specifies the dimension limit deviations of automotive molded plastic parts without tolerance indications.

This standard is applicable to the dimension of thermosetting plastic and thermoplastic parts formed by molding, injection and casting without tolerance indications.

This standard is not applicable to the dimension of plastic parts manufactured by extrusion, blow molding, cold drawing, sintering and foaming processes without tolerance indications.

2 Normative references

ZB T04 006.2 Dimension limit deviations of automotive cutting parts without tolerance indications

3 Terms

Molding shrinkage V: difference between the dimension Lw of mold in standard atmosphere and the dimension LF of molded part measured after being placed in the standard atmosphere with a temperature of 23±2℃ and a relative humidity of (50±2)% for 24 h.