The injection moulding industry is full best practice beliefs and guidelines that most in the industry follow quite diligently but did you know that some of these tips and tricks are more myth than anything else?

When it comes to optimising your injection moulding process there are a number of myths that are accepted as truth and in this two-part post we’ll debunk six of the most common.

Your machine should solve all your quality-related problems

This is a fallacy. According to Prabodh Balur, author of the book A guide to Injection Moulding of Plastics 3rd edition, the role of the machine is to provide good homogenous melt and consistent reproduction of set parameters all the time during production.

The connected load of the machine depends on clamp specification

Balur notes that the connected load of the machine is decided by the specification of the injection unit, which includes the injection rate and the maximum injection pressure, rather than the clamp specification.

Pressure is responsible for the filling of melt in the space between a clamped mould

The speed or injection rate, which is a component of injection power, is responsible for filling the melt in the space.  Injection power is the product of the injection rate and actual pressure during the filling phase.

Lookout for Part 2.

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Myths sourced from A guide to Injection Moulding of Plastics 3rd edition