Method for producing a tube and injection-molding device
US11478968B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2016 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Jul 16, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/1726
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing a tube by injection molding a thermoplastic molding compound by using an injection-molding device with an article cavity, which defines the outer contour of the tube, and with an injection device, which is designed to drive a profile through the article cavity filled with the thermoplastic molding compound and thereby displace a liquid core of the molding compound, wherein the method envisages closing an opening of the article cavity with a mould core, which with the article cavity forms a hollow mould space and which has a secondary cavity that can be filled with the molding compound. After the filling of the article cavity and the hollow mould space with the thermoplastic molding compound, a projectile is driven through the article cavity, wherein the projectile displaces the molding compound into the secondary cavity. Subsequently, the mould core with the filled secondary cavity is pulled, wherein the displaced molding compound is separated from the molding compound forming the tube. The invention also relates to an injection-molding device for carrying out the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.