Download Celcon POM Processing and Troubleshooting Guide

Celcon®
acetal copolymer
Table of Contents
Overview
Introduction
1.
Overview
7
1.1
1.2
1.3
1.4
1.5
Chemistry of Acetal Copolymers
General Characteristics
Product Types
Regulatory Codes and Agency Listings
Product Support
7
7
7
8
8
2.
General Guidelines
11
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Storage and Handling
Safety and Health Information
Flammability
Drying
Processing Start-Up
Changing from Another Resin
Changing from a Different Grade of
Celcon® Acetal Copolymer
2.8
Processing Shutdown
2.9
Use of Regrind
2.10
Secondary Operations
2.10.1 Finishing
2.10.2 Surface Treatment
11
11
11
12
12
12
13
13
13
14
14
14
3.
Dimensional Stability
15
3.1
15
3.2
3.3
3.4
3.5
3.6
Shrinkage Caused by Processing
(Injection Molding)
Part Warpage
Post-Molding Shrinkage
Annealing
Tolerances
Moisture Absorption
4.
Injection Molding
19
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.2
4.2.1
4.2.2
4.2.3
4.2.4
Equipment
Barrel and Screw
Nozzles
Plasticizing Capacity
Clamping Force
Mold Design
General Criteria
Mold Bases
Mold Cavities and Cores
Mold Surface Finish
19
19
20
20
20
21
21
21
21
21
17
17
17
18
18
1
General
Guidelines
2
Dimensional
Stability
3
Injection
Molding
4
Blow Molding
5
Extrusion
6
Rotational
Casting
7
2