Apparatus for the feeding (metering) of liquid synthetic-resin components
US4211345A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1978 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Apr 21, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J1/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dosing unit for highly filled synthetic-resin components, usually a polyol and an isocyanate mixed with glass fiber, barite or chalk, comprises a piston which displaces the components or one of them, especially the filled component under the control of fluid pressure. The change in the feed rate of the fluid-controlled unit is varied by varying the speed of the displacing member of the fluid-controlled unit which is preferably a piston-and-cylinder arrangement. The piston-and-cylinder arrangement has its drive piston formed with a normal seal and its dosing or metering piston formed with an adjustable seal such that a tool can be inserted through the cylinder wall to rotate a toothed member of this latter piston to adjust for wear of its seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.