Tooling and Design

The costs of  tooling for dip moulding is one of its most attractive features as it is many many times less expensive to fully tool  even for high volume production runs than when compared to other moulding  processes.  Tool manufacture lead times are very much shorter too and coupled with the low costs involved it makes perfect sense to consider dip moulding for your component manufacture.

Aluminium is the most common tooling material. Simple shapes can be easily machined and more complex shapes usually sand cast and then finished by machine.  Additionally  the tooling can be produced from the existing  product that the dip moulding is to fit on. With little or no modification  required tooling from customer components  involves  very little cost.

The designer should keep in mind that he or she  has a very quick means of producing a proof of concept prototype. Even where the final tooling will be cast  the prototype could be fabricated in sheet  metal  as a standalone tool or as a  composite of sheet metal and machined parts.  Should the design need modification the prototype need only have modification made directly to it rather than scrapping and starting again.

As with all processes there are guidelines  to follow when designing dip moulding tooling. The PVC plastisol is a liquid that will begin to gel on contact with a hot former and so the flow of the material needs to be aided.  In most cases this will mean the addition of  radii and draught angles to avoid air entrapment  and keep the wall thickness constant.  Blind holes will require venting  but such holes can be used to produce  holes in the moulding during the dipping process to good effect

LoVen have built up considerable expertise in tool design, often  proving to be innovative  and willing to think beyond the normal realm of dip moulding. We offer a fast and efficient high precison service from a well equiped CNC based tool room.