Large components and components demanding more precision often benefit from being injection moulded. Injection moulding is usually used for multi-cavity moulds and is capable of producing many components per cycle. This method also allows many of the moulding parameters to be precisely controlled, and as a result injection presses are usually significantly more expensive than a traditional press. Tight tolerances can often be achieved by altering the flow of material within the mould. We frequently use mould flow simulation techniques to ascertain the optimum mould design. An experienced moulder will save the customer time and money, as the 'de moulding' of the parts can be optimised - hence reducing cycle time and waste parts.
Silicone extrusion is the process whereby silicone is forced through a shaped die (a stainless steel disc with a pattern cut out) to produce cords, complex profiles and cross-sections. Silicone extrusions typically show a huge improvement over other materials – they last longer, come in a multitude of colours, and stand up to a wider variety of environmental conditions. We can produce simple extrusions, or make custom sizes with complex cross-sections. These can be multi-layered to produce a product with multiple performance properties and can also be manufactured in an ISO 7 cleanroom. During the manufacturing process, silicone extrusions are prone to shrinkage. This can result in an unreliable product that does not meet the specified tolerances. Unfortunately, the extent of the shrinkage is rarely known beforehand. This can lead to a large amount of tool wastage. Only by experiencing tens of thousands of different extruded profiles can suitable tooling be produced. At Primasil, we have over 30 years of designing tooling for silicone extrusions, with a very high success rate! In fact, we will guarantee that we can design the correct tooling first time. If we dont, we will continue until we get it right – at our expense!
Primasil was founded in 1978 to meet industrys growing requirement for silicone rubber. Originally a moulding company, Primasil soon expanded to offer extrusion and develop their own custom formulations, quickly becoming the leading independent UK supplier of silicone rubber compounds. Today, Primasil continues to supply silicone products and materials all over the world to many different industries, including the quality led medical industryusing the brand name "Medisil". Based on a can do attitude, Primasil has succeeded with challenging products where other companies have failed. This had led to many successful long-term partnerships with a diverse range of customers – from small local manufacturers to the largest multinationals.