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Below are a number of editorials about

injection moulding & overmoulding

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For more injection moulding & overmoulding editorials, click the tabs above.

Tiny injection mouldings made in tiny amount of timedpa Magazine editorial
Toolcraft make initial injection mouldings from 10 tools within 10 daysfree help on injection moulding, free help on, injection moulding, overmoulding, help on, toolcraft plastics

This tiny injection moulding is the result of work carried on behalf of an overseas client by Swindon based Toolcraft Plastics.

The set of mouldings each of which could be balanced on a pinhead, was developed for volume production, and with trial machines on hand, the Toolcraft team was able to achieve high volume from all 10 tools within ten days.
Injection moulding redesign service improves sealEPPM Magazine editorial
A better seal at a much lower cost was achieved by Toolcraft of Swindon when 2 steel valve seating rings were redesigned in tough plastic

free help on injection moulding, free help on, injection moulding, overmoulding, help on, toolcraft plastics Tests on the acetal injection moulding showed the plastic to 'give' a little, making an even better seal than the steel at a far lower cost. The 8 radial holes were particularly expensive to machine in steel & were incorporated into the redesign by Toolcraft, eliminating post moulding machining.  

Designing 'out' the time consuming cutting of the holes was pivotal/crucial in cutting costs & was managed on 1 mould tool without retracting cores which would've slowed the process & increased tool costs
Overmoulding saves on two material parts dpa Magazine editorial
2 part/colour moulding using 1 machine means complex, expensive tools & machines. Using 2 tools/machines Toolcraft can provide cost & other benefits
free help on injection moulding, free help on, injection moulding, overmoulding, help on, toolcraft plastics
Parts inspection between shots improves overall yield by eliminating defective pieces at the first stage, whilst careful choice of material & controlled conditions, ensures a firm bond without distortion. Recently, Toolcraft used this overmoulding method to manufacture a handheld recyclable monitor which detects a number of gases with a visible/audible alarm.

Toolcraft completed assembly by making 2 translucent covers, 1 with a clear lens & then pad printed and ultrasonically welded threaded brass inserts into the chassis.