Injection-molding machine for plastic with rotary and linear dri

Details Injection-molding machine for plastic with rotary and linear dri Injection-molding machine for plastic with rotary and linear dri

1997-01-21

1999-08-10

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 407, 2643281, 425145, 425587, B29C 4582

Patent

active

059354941

ABSTRACT:
An injection-molding machine for plastic, including an injection cylinder, a screw arranged in the injection cylinder and having a drive shaft, an electric motor, a mechanical rotary drive for connecting the electric motor to the drive shaft so that rotary motion is imparted to the drive shaft, and a linear drive for connecting the electric motor to the drive shaft so that linear motion is imparted to the drive shaft. The linear drive includes a pressure medium pump connected to the electric motor, and at least one synchronous piston-cylinder unit connected to the drive shaft and in fluid communication with the pump. A control unit is connected to the pump for controlling one of pump and motor absorption level. Hydraulic lines are configured and arranged to directly connect an input of the synchronous cylinder with an output of the pump and an output of the synchronous cylinder with an input of the pump in a closed hydraulic circuit.

REFERENCES:
patent: 3317962 (1967-05-01), Morse
patent: 3319298 (1967-05-01), Kiraly
patent: 3666141 (1972-05-01), Ma et al.
patent: 3888393 (1975-06-01), Drori
patent: 4712991 (1987-12-01), Hehl
patent: 4798527 (1989-01-01), Gunda
patent: 5002717 (1991-03-01), Taniguchi
patent: 5018950 (1991-05-01), Reinhart

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