Hot runner nozzle having lateral electrode terminals
US5312241A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Aug 17, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/2735
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hot runner nozzle (10) with lateral electrode terminals (28) has a broad flanged body (18) that continues as a thermally graded narrower shaft (20) through which a heatable flow tube (22) extends. Into its high-strength foot portion (38), at least one nozzle tip (50, 50') is insertable; a high-strength heat-conductive envelope tube (30) having a re-entrant outer shoulder (34) adjacent the casing (12) is joined to a separating sleeve (36) of the shaft (20). The lower end of a heating tube (26) is thermoconductively connected to a metal bush (40) whose upper portion is thermally insulated by air gaps (54, 44) from both the separating sleeve (36) and the heating tube (26). A supporting ring (56) of low heat conduction is mounted between axial faces of the heat-conductive bush (40) and the separating sleeve (36). The nozzle tips (50, 50') are form-fitted or welded to the foot portion (38) at an angle between 0.degree. and 90.degree. relative to the axis (A) of the shaft (20). The foot portion (38) is centered in a divided mold insert (16) wedge-fitted into the casing (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.