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Home » Books » Polymers and Plastics » Applications » Roofing

How to Choose a Plastics Injection Moulding

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How to Choose a Plastics Injection Moulding
Author: Smith
ISBN 1-871463-38-6

Published: 1995
184 pages

Price: $50.00 + S&H
  • Summary
  • Table of Contents
  • Related Publications
Buying an injection moulding machine can be a nerve racking experience. Not only are there countless specification, capability and price factors to be considered, but getting objective advice about machinery purchase can be nearly impossible. Until now...

This book sets out to help anyone who wants to buy an injection moulding machine but does not know where to start. Some readers may be those who find themselves suddenly plunged into the world of injection moulding and need a crash course in the subject.

This essential book also covers
· Different types of machine -toggle, direct, hydraulic, tiebarless, all electric.
· How to choose a machinery supplier
· Matching the mould to the machine within a certain budget
· The importance of screw design
· Using a machine performance analyzer
· Full explanation of industry terminology
A step by step guide to choosing a machine
The most important headings in a machine specification table
Other headings in a specification table explained
Optional extras, alternative equipment and ancillaries
Further important points to consider
Screw performance
Proportion of total shot volume which should be used
Shot weight repeatability and machine stability
Control systems
Closed loop injection control
Proprietary components
Different injection moulding machine designs
Reciprocating screw and other types of injection unit
Toggle, direct hydraulic, toggle/direct hydraulic and hydro mechanical machines
Tiebarless machines
All electric machines
Multi colour and multi component machines
Multi station machines
Double daylight machines
Machines for unusually large mouldings
Rebuilt machines
Low shot weight machines
Manual and semi automatic machines
Making a production cost analysis
Recording machine operating costs as a guide to future machine choice
Justifying the cost of an expensive machine
Budgeting for mould and machine
Sourcing moulds
Selecting a supplier
Distributors and agents
Inportance of first choice
Judging personnel quality
Drawing up a machine specification
How manufacturers work out their machine prices
Influence of competition
Dependence upon suppliers
Delivery time
‘Inhouse’ and ‘trade’ moulders
Late specification changes
Conducting a machine trial
Checking for output capability
Weight and dimensional consistency
Using an analyzer
Colour dispersion
Electricity consumption
Decibel level
Access for maintenance
Purging out
Mould safety sensing
Mould face parallelity
Delivery checks
A method of quantifying to make a final choice of machine
Replacement period
Depreciation and residual value
Glossary - Materials terms
Mould terms
Machine and processing terms
Appendix - Cavity pressure and clamping force calculation
Further Reading


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