Hot runner system sealing arrangement

摘要

A sealing arrangement between hot runner components includes a sealing component positioned between a first hot runner component and a second hot runner component having a molding material channel extending therebetween. The sealing component includes an opening through which the molding material channel extends. The sealing component is received in a bore in the second hot runner component such that a portion of the sealing component projects beyond the second hot runner component to create a gap between the first hot runner component and the second hot runner component. The sealing component has a hardness that is greater than a hardness of the second hot runner component and less than a hardness of the first hot runner component. Further, the sealing component has a coefficient of thermal expansion that is proximate to a coefficient of thermal expansion of the second hot runner component.

主权项

1. A hot runner assembly comprising:
a first hot runner component and a second hot runner component having a molding material channel extending therebetween; and a sealing component positioned between the first hot runner component and the second hot runner component, and having an opening through which the molding material channel extends, wherein the sealing component is received in a bore in the second hot runner component such that a portion of the sealing component projects beyond the second hot runner component to create a gap between the first hot runner component and the second hot runner component, wherein the sealing component has a hardness that is greater than a hardness of the second hot runner component and less than a hardness of the first hot runner component, and wherein the sealing component has a coefficient of thermal expansion that is proximate to a coefficient of thermal expansion of the second hot runner component.