Patent · US Active

Injection unit for an injection moulding machine

US7967590B2 · kind B2 · utility

3Cited by

10References

10Claims

0Family size

Assignee

Sumitomo (SHI) Demag Plastics Machinery GmbH · DE

Inventors

Otto Grunitz · Rastenberg, DE
Simon Schulz · Bad Mergentheim, DE

Key dates

Filing date	Aug 7, 2009
Grant date	Jun 28, 2011
Priority date	—
Expiry date	Jan 20, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C2945/76933
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An injection unit for an injection molding machine includes a screw cylinder, a plasticizing screw which can be driven therein axially and rotatably, the drive unit of which has an electric drive motor, a spindle drive coupled to the screw for the axial movement of the screw, and a rotary drive arranged coaxially with the spindle drive and allowing an axial displacement of the screw for the rotational movement of the screw. A differential gearing, is arranged between the drive motor, on the one hand, and spindle drive and rotary drive, on the other hand, with a differential cage, two driven gears and at least one compensating gear in between.

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