Products used in this application:
Rubber and medical tube extrusion requires that wall thickness and diameter is correctly maintained throughout the extrusion process. In this sketch, the QB2 vacuum breaker assemblies are controlling the level of vacuum in each zone of the sizing chamber (to control outer diameter) based on a command signal from the customer’s controller. The vacuum pump is pulling full vacuum in each zone and the vacuum breaker assemblies are introducing positive pressure to overcome the vacuum level and maintain the desired level.
The QB3 shown is controlling low pressure through the tube as it is extruded to maintain the wall thickness and inner diameter of the tube. Constant and stable flow and pressure control is required to perform this function.