Hollow Die Extrusion for Precision Thermal Break Strips

The extrusion die is the precision tooling that defines the final shape and dimensions of the thermal break strip, acting as the final and most critical gateway in the extrusion process. It is a meticulously engineered block of high grade, hardened tool steel that receives the homogeneous melt from the extruder and shapes it into the desired continuous profile. The internal flow channel, or manifold, of the die is designed using sophisticated flow simulation software to ensure that the viscous polyamide melt flows at a uniform velocity across the entire cross section of the profile as it exits the die land. An imbalance in flow would result in a distorted product, such as curling, warping, or variations in wall thickness. The die land itself is precisely machined to the final strip dimensions, and its length is calibrated to apply the correct amount of backpressure, ensuring material consolidation and a smooth surface finish. For complex thermal break profiles with multiple functionalities, the die design becomes even more critical. Our collaboration with mold manufacturing experts through Polywell grants us deep expertise in die design, material selection, and machining. We produce durable, wear resistant dies that can maintain their precise geometry over long production runs, even with abrasive glass filled materials. Providing a perfectly balanced and robust extrusion die is a cornerstone of our one stop service, as it is the key to transforming our specialized polyamide material into a consistently high quality and high performance thermal break product.