Externally heated hot-runner nozzle with resistance wire
US6323465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2748
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An externally heated hot-runner nozzle for producing injection molded parts has a resistance wire which is composed of an inner electric heating conductor, a ceramic insulating intermediate layer and an outer metal sheath and comprises two end portions to which a heating voltage can be applied, as well as an intermediate section which in the form of a heating coil is assigned to the circumference of the hot-runner nozzle. The resistance wire is characterized in that the two end portions having an outer diameter of 1.5 mm to 2.5 mm are dimensioned to be larger than the intermediate section having an outer diameter of 1.0 mm to 1.8 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.