CS-8891_CHARACTERISTIC STANDARD 特性标准

MAXIMUM ALLOWABLE CONDITION FOR PARTING LINE FLASH

AND DIE MISMATCH FOR PLASTIC INJECTION MOLDED PARTS

1.0 GENERAL

1.1 Purpose

1.1.1. Purpose of Standard

This s tanda r d c o n s t i t u t e s a n a c c e p t a n c e s p e c i f ication for parting line flash and

die mismatch for plastic injection molded parts.

1.2 Scope

1.2.1 Application

This standard is for the use in supplying plastic injection molded parts under

purcha se or d e r s o f C h r y s l er Motors or its subsidiaries.This standard is limited

in its appl i c a t i o n t o t h o s e d r a w i n g s o r e n g i n e ering illustrations which call out

this s tanda r d n u m b e r.O r i g i n a l e q u i p m e n t a n d r eplacement parts for some vehicles

sold by Chrysler Motors Corporation or its dealers are not covered by this

standard.

2.0 REQUIREMENTS

2.1 Definitions

2.1.1 Part Surface Classifications

2.1.1.1. Class "A"

Class "A" Surface (High Visibility) is defined as a surface that is in direct

A single asterisk "*" after the paragraph header denotes a technical change to the paragraph. A triple asterisk before and after an item (*** text ***) identifies the specific changed text.

Date Mdl. Yr. Eff. Code & Disp Code PCN No. Change Text Changes and Cancellations

Date Issued 8/22/89 Dept 4602 Contact K. Shellnut IMPORTANT: Chrysler Corporation standards, specifications and drawings are subject to frequent revision. It is the users' responsibility to comply with current versions. Distribution of standards to parties other than Chrysler Corporation suppliers, whether with or without charge, is for information only. A subscription service is available at reasonable cost, which will automatically provide the subscriber with current standards. Subscription information or copies of current standards are available from the Engineering Standards & Information Services Department, Vehicle Engineering Office, Chrysler Corporation.

view and/or contacted in a functional manner by vehicle occupants.

2.1.1.2 Class "B"

Class "B" S u r f a c e(L o w V i s i b i l i t y)i s d e f i n e d as a surface that is not in direct view of vehicle occupants, but the possibility exists that the surface may be visible and/or touched.

2.1.1.3 Class "C"

Class "C" Surface (Non-Visible) is defined as a surface that is not visible and/or touched by vehicle occupants.

NOTE

All dr awing s o r e n g i n e e r i n g i l l u s t r a t i o n s t h a t reference this standard must have part surfaces classified in accordance with the criteria established above. 2.1.2 Parting Line, Flash, Die Mismatch

2.1.2.1 Parting Line

Parting Line is defined as the point at which the core and cavity sides of the mold meet and subsequently to form the separation point of the tool.

2.1.2.2 Flash

Flash is defined as excess material formed where the core and cavity meet, result ing f r o m t h e c o r e a n d c a v i t y n o t b e i n g p roperly shut-off leaving a gap for the plastic to fill or flow into.

2.1.2.3 Die Mismatch

Die mi smatc h i s d e f i n e d a s a n o f f s e t c o n d i t i o n between the core and cavity sides of the mold.

NOTE

Parting lines caused by mechanical mechanisms such as lifters, slides or cams must meet the requirements of this standard.

2.1.3 Part Quality

TABLE 1: FINISH PART QUALITY REQUIREMENTS

Maximum Parting Line Flash

Surface Type Height Width Maximum Die Mismatch

Class "A" 0.15mm (.006in) 0.15mm (.006in) 0.13mm (.005in)

Class "B" 0.20mm (.008in) 0.20mm (.008in) 0.20mm (.008in)

Class "C" 0.30mm (.012in) 0.30mm (.012in) 0.25mm (.010in)

NOTE

All values listed above are Chrysler Motors maximum allowable conditions. Since plastic injected molded parts usually exhibit both conditions

(flash and die mismatch) the total combination cannot exceed the largest

value listed for a specified surface.

2.2 Quality Assurance

2.2.1 Responsibilities

The responsibilities regarding Design Verification, and Production Validation are shown below.

2.2.1.1 Design Verification

2.2.1.1.1 Supplier

The su pplie r s h a l l p e r f o r m t h e i n s p e c t i o n m e t h od specified in section 2.3 of this standard, and be able to show proof of conformance. This initial inspection method will be performed on ungrained parts and prior to dimensional sample submission. Inspection locations and data results must be listed on part submission paperwork.

2.2.1.1.2 Supplier Quality

The appropriate Supplier Quality Specialist will review the supplier's documentation and verify compliance prior to dimensional part submission.

2.2.1.1.3 Product Engineering Lab (PEL)

The Pr oduct E n g i n e e r i n g L ab (PEL) shall perform the inspection method specified in section 2.3 of this standard, to determine parting line and/or die mismatch conformance. The only exception to this requirement are parts submitted by a self-certified supplier.

2.2.1.2 Production Validation

2.2.1.2.1 Supplier

The supplier is responsible for annually verifying part compliance using the inspection method specified in section 2.3 of this standard, and have proof of conformance on file.

2.2.1.2.2 Supplier Quality

Suppli er Qu a l i t y s h a l l a t t h e i r d i s c r e t i o n a u d it the supplier's records or parts to verify compliance.

2.2.1.2.3 Assembly Plant

The us er as s e m b l y p l a n t s h a l l p e r f o r m t h e i n s p ection method specified in section 2.3 of this standard prior to determining disposition of parts suspected of having exce s s i v e p a r t i n g l i n e f l a s h o r d i e m i s match. The Product Engineering Lab (PEL) will provide inspection capabilities upon request.

NOTE

Supplier must have a preventive maintenance program in place to ensure part quality and conformance to this standard.

2.3 Method of Testing

2.3.1. Procedure

2.3.1.1 Part Preparation

The pa rt sh a l l b e c u t i n t o sections perpendicular to the parting line along its entire length. In order to minimize the shallowing effect of the profile projec tor a n d m a i n t a i n d imensional repeatability the width of the part sections shall be le s s t h a n6.4m m.T h e s i d e s u r f a c e s o f the part sections shall be trimmed to rem ove a n y b u r r s a n d o b t a i n a s m o o t h s u r f a c e. Extreme care must be used during the cutting and trimming process to avoid damaging the parting line.

2.3.1.2 Part Measurement

Part c ompli a n c e t o t h i s standard shall be verified through the use of a profile projec tor. P a r t s e c t i o n s s h a l l b e h e l d b y a v i se and located 90 degrees from the light source. The orientation of the part section can be slightly adjusted to focus in th e i m a g e.O n c e the image is visually optimized parting line flash and die mismatch can be accurately measured.

2.3.1.2.1 Height

Height can be determined by locating the bottom of the parting line on the horizontal cross hair and zeroing out the "Y" coordinate axis on the machine. Then v ertic a l l y m o v e t h e image down until the top of the parting line is on the horizontal cross hair. The height will be displayed on the "Y" coordinate axis readout.

2.3.1.2.2 Width

Width can be determined by locating either side of the parting line on the vertic al cr o s s h a i r a n d z e r o i n g o u t t h e"X"c o ordinate axis on the machine. Then horizo ntall y m o v e t h e i m a g e l e f t o r r i g h t(d e p ending on original position) until the vertical cross hair rests directly on the other edge. The width will be displayed on the "X" coordinate axis readout.

NOTE

Manual measurements can be obtain by scaling the image (10 times size) on the screen, but is not recommended due to the stringent requirements called out in this standard.

3.0 CONTROL

The supplier shall not ship parts which do not meet the requirements of this standard.

Any proposed changes to this standard should be directed to Chrysler Motors, Vehicle Engineering office and Supplier Quality, Interior Trim Departments. 4.0 CONTACTS

Questi ons c o n c e r n i n g t h i s s t a n d a r d s h o u l d b e d irected to Chrysler Motors, Vehicle Engineering Office or Supplier Quality, Interior trim Department.

5.0 REFERENCES

Non Applicable.

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