For any injection moulded component the force used to fill the mould tool has to be resisted by the machine locking force being applied. If this is not the case then the mould will be forced apart resulting in split line flash on the moulded component. It is equally important not to use more Clamp Force than is necessary as this would result in additional energy requirements, tooling and machine wear plus a reduction in the natural venting of the mould.

The force used to fill the mould will be dependant upon many factors. The most significant ones are Material Viscosity, Flow Length / Wall Thickness ratio’s within the tooling, Speed of filling and the total Projected Area.

The Clamp Force Calculator will guide you through the process to determine the required force to be used for any given combination of these factors. Recommendations made are based on generally accepted Rules Of Thumb and are not equivalent to the alternative more detailed computer aided analysis techniques currently available. 

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