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New silicone spray machine with on/off thixotropic valve

News International-French

13 Jun 2012

JEC Asia 2012 - UK’s ACC Silicones Ltd. and Alan Harper Composites Ltd. combined their technologies to introduce a new innovative solution.

Although silicone spray has a high viscosity, it will easily sag on vertical mould wall faces when manufacturing reusable silicone bags for infusion and prepreg applications. Multiple spray coats are therefore needed and the wait time required for each coat to gel slows bag production.


UK’s ACC Silicones Ltd. and Alan Harper Composites Ltd. combined their technologies to introduce a new innovative solution. For faster manufacture, the SilCon V spray machine is designed to enable switching on and off the VBS26T thixotropic additive at will so that it is immediately available at the machine spray head as and when selected. The operator needs only to operate the on/off thixotropic valve to instantly spray silicone with or without the thixotropic additive. Faster spray-up times are immediately achieved as thicker and fewer coats can be sprayed to build up the 2-3 mm bag thickness.


Applying the thixotropic additive at the spray head allows pumping a similar grade silicone from bulk at greater speed with less energy, with the added feature of being able to switch it on after the initial non-thixotropic film is applied.


Reusable Silicone Bag (RSB) technology is now gaining rapid acceptance in infusion and prepreg moulding as it is proven to be cost effective after only 8 moulded parts and dramatically reduces the environmental impact of conventional consumable bag technology wastage.

More information: www.alanharpercomposites.com

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