Patent · US Active

Method for the production of plastic moulded parts

US11780139B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

Kraussmaffei Technologies GMBH · DE

Inventors

Stefan Moser · Hallbergmoos, DE
Nicolina Topic · Munich, DE
Maximilian Schadhauser · Unterhaching, DE

Key dates

Filing date	Nov 5, 2018
Grant date	Oct 10, 2023
Priority date	—
Expiry date	May 10, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2105/12
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method is described for producing fibre-reinforced plastic moulded parts, wherein endless fibre strands are fed by a fibre braking device and/or cut fibres via a gravimetric metering device, and a plastic material to be melted, by a volumetric metering device are fed to a single-screw plasticizing unit. Plastic material which is molten and is mixed with fibre material is injected into a moulding tool by an injection stroke of the plasticizing screw. According to the application, the ACTUAL mass flow of the plastic material is calculated from the ACTUAL volume flow of the plastic material and from the ACTUAL mass flow of the fibre material. The ACTUAL mass flow of the plastic material is compared to a TARGET mass flow of the plastic material, and the rotation speed nd of the rotary drive of the metering element of the metering device is adapted.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.