BASIC PRINCIPLES OF INJECTION MOULDING

A satisfactory injection moulding can only be achieved by the correct set-up of machinery, mould and material.
The best mastic will not allow optimum economical manufacture if
- it is difficult to process
- the machine cannot be correctly set to suit the material through having inadequate control and regulating capabilities
- the machine has not been set correctly or
- the mould has not been designed to suit the material.
However, a well designed li InionILq.aLajilELiL2 with sophisticated
and versatile controls and hig installed capacity on its own Will not
provide the optimum if
- the mould is of inadequately weak design
- the mould temperature cannot be controlled exactly
- the mould is not harmonized with the machine
- the material is not suitable
- the material has not been correctly prepared (for example not preheated nor dried).

However, a good mould, as already indicated, also requires to be matched to the material, for example in respect to
- attention to shrinkage, right draft for demolding
- attention to the correct temperature control (temperature pattern, heating and cooling systems and many other aspects)
- attention to the correct gating and the runners
- matching to the machine, for example in respect to the dimensions between tie bars and the dimensions of the platens, the maximum and the minimum mould height, the mould opening stroke, etc.







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