Injection apparatus for industrial machine

• US 20030108640A1
• Filed: 11/27/2002
• Published: 06/12/2003
• Est. Priority Date: 12/10/2001
• Status: Active Grant

• Current Assignee: Toshiba Kikai Kabushiki Kaisha (Shibaura Machine Co., Ltd.)
• Original Assignee: Toshiba Kikai Kabushiki Kaisha (Shibaura Machine Co., Ltd.)
• Inventors: Nishizawa, Makato, Kobayashi, Kazuhito, Kawai, Junsuke
• Granted Patent: US 7,011,511 B2
• Time in Patent Office: Days
• US Class Current: 425/587
• CPC Class Codes: B29C 45/1761 Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames B29C45/1747 takes precedence
• CPC Class Codes: B29C 45/5008 Drive means therefor

Abstract

An injection apparatus for industrial machine capable of high speed injection is provided with an injection barrel communicating with a cavity formed by at least a pair of mold dies and introducing mold material to an end portion on communicating side of the barrel, a screw for injection inserted in the barrel in which the screw is capable of reciprocating motion so as to inject and fill the mold material into the cavity, a support means holding an end of the screw opposite to the cavity and capable of moving in the direction of the reciprocating motion, a first drive mechanism including an electric servomotor for moving the support means in the direction of the reciprocating motion and a second drive mechanism for moving the first drive mechanism in the direction of the reciprocating motion.

Claims

1. An injection apparatus for industrial machine comprising;

an injection barrel communicating with a cavity formed by at least a pair of mold dies and introducing mold material to said cavity,

a screw for injection inserted in said barrel in which said screw is capable of reciprocating motion so as to inject and fill said mold material into said cavity,

a support means holding an end of said screw opposite to said cavity and capable of moving in a direction of said reciprocating motion,

a first drive mechanism for moving said support means in the direction of the reciprocating motion and

a second drive mechanism for moving said support means or said first drive mechanism in the direction of the reciprocating motion.

2. In the injection apparatus for industrial machine as in claim 1, wherein at least either one of the first drive mechanism or the second drive mechanism is provided with an electric servomotor, and a ball screw and ball nut arrangement that converts rotating motion of a rotary drive axis of the electric servomotor to linear motion.

3. In the injection apparatus for industrial machine as in claim 2, wherein the first drive mechanism is provided with the electric servomotor, and the ball screw and ball nut arrangement, and the second drive mechanism is arranged to be parallel with the ball screw of the first drive mechanism.

4. In the injection apparatus for industrial machine as in claim 2, wherein the first drive mechanism is provided with the electric servomotor, and the ball screw and ball nut arrangement, and the second drive mechanism is arranged in series or concentrically to the axis line of the ball screw.

5. In the injection apparatus for industrial machine as in claim 1, 2, 3 or 4, wherein at least one of the first drive mechanism and the second drive mechanism is provided with either one or combination of a roller screw, a linear motor and a hydraulic or pneumatic actuator.

6. In the injection apparatus for industrial machine as in claim 1, wherein a plunger is used for injecting as a substitution of the screw.

7. In the injection apparatus for industrial machine as in claim 1, wherein the industrial machine is a plastic injection molding machine.