HANNOVER MESSE 2019,
01 - 05 April
The Silicone Vacuum Treatment SVT developed by HÜBERS ensures that the components are absolutely free of voids and cavities. Due to the thorough degassing of the material components, bubbles are already prevented during material processing. The Process
The material components are sucked into separate preparation mixers and degassed under vacuum. Therefore, the use of all types and sizes of delivery containers is possible. Even dented barrels can be used. The filling of the mixer vessels and the treatment and degassing of the material takes place continuously. The vessels remain continuously under vacuum. There is no limit to the filling quantity of the parts to be produced. For particularly high material throughputs several containers can be coupled for each component in order to avoid production interruptions by changing containers. Optionally, the material can already be pre-heated in the dosing mixers. Thereby the cycle time is shortened in the mold. The expansion of the material in the hot mold is reduced and thus the inner pressure on the mold is greatly reduced. Dosing pumps control the flow of the material into the mold via a static mixer. The filling of the mold and the subsequent vulcanisation of the material is carried out under low material pressure. Specially configured venting channels in the mold prevent the re-accumulation of air in the material. Optionally, the air in the mold can be evacuated in order to ensure a complete filling even with complex geometric shapes. The pressure control in the mold is achieved via the dosing pumps. Optionally, a plunger can be used between the static mixer and the mold. This allows a continuous filling of the mold even in very large quantities, and an even more precise regulation of the pressure in the mold. The use of plungers also allows the central material supply of several molding stations, with only one mixing and dosing system.
On-site phone: +49 511 89405710
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