Control apparatus of injection molding machines

• US 4,911,629 A
• Filed: 08/12/1988
• Issued: 03/27/1990
• Est. Priority Date: 08/13/1987
• Status: Expired due to Term

• Current Assignee: Toshiba Kikai Kabushiki Kaisha (Shibaura Machine Co., Ltd.)
• Original Assignee: Toshiba Kikai Kabushiki Kaisha (Shibaura Machine Co., Ltd.)
• Inventors: Fujita, Shigeru
• Primary Examiner(s): Woo, Jay H.
• Assistant Examiner(s): Heitbrink, Timothy W.
• Application Number:
  US07/231,481
• Time in Patent Office: 592 Days
• Field of Search: 425/143, 425/144, 425/149, 425/150, 425/170, 425/171, 425/135, 264/40.1, 264/40.3, 264/40.6, 264/40.7
• US Class Current: 425/135
• CPC Class Codes: B29C 45/76 Measuring, controlling or regulating measuring in general G01; controlling or regulating in general G05
• CPC Class Codes: B29C 45/768 Detecting defective moulding conditions B29C45/84 takes precedence
• CPC Class Codes: G05B 19/4063 Monitoring general control system G05B19/4062 takes precedence
• CPC Class Codes: G05B 2219/36514 Select by force, height or other detection
• CPC Class Codes: G05B 2219/45244 Injection molding

Abstract

Control apparatus for an injection molding machine having a sensor provided for the injection molding machine for producing a signal representing the quality of the molded product or a molding condition of the injection molding machine, a set value memory device in which a permissible range of the signal is set, a judging member for judging as to whether the signal lies in the permissible range, a production lot data memory device containing control data for the injection molding machine with respect to a lot now being produced, and a destination table showing a destination of the data corresponding to a result of judgment of the judging member, a controller for controlling the injection molding machine in accordance with the control data stored in the production lot memory device, and another memory device for storing a plurality of sets of the production lot data regarding various lots or production conditions, and a storing device for determining a destination of the production lot data based on the result of judgment of the judging member by referring to the destination table. The storing device transfers to the production lot data memory device the production lot data whose destination has been determined.

Claims

1. Control apparatus for an injection molding machine, comprising:

a sensor provided for said injection molding machine for producing a signal which represents a molding condition of said injection machine;

set value memory means in which a permissible range of said signal is set;

judging means for judging as to whether said signal lies in said permissible range;

production lot data memory means containing a production lot control data set for said injection molding machine with respect to;

a destination table stored in said production lot data memory means showing a destination of said data corresponding to a result of judgment of said judging means;

control means for controlling said injection molding machine in accordance with said control data stored in said production lot data memory means;

another memory means for storing a plurality of sets of said production lot data regarding various production lots; and

storing means for determining a destination of said production lot data based on the result of judgment of said judging means by referring to said destination table stored in said production lot data memory means;

said storing means transferring to said production lot data memory means said production lot data whose destination has been determined.

2. The control apparatus according to claim 1 wherein said another memory means stores a plurality of production conditions of said injection molding machine.

3. The control apparatus according to claim 1 wherein said judging means comprises a plurality of comparators which compare said signal with an upper limit value and a lower limit value of said permissible range.

4. Control apparatus for an injection molding machine, comprising:

a sensor provided for said injection molding machine for producing a signal which represents quality of a product manufactured by said injection molding machine;

set value memory means in which a permissible range of said signal is set;

judging means for judging as to whether said signal lies in said permissible range;

production lot data memory means containing a production lot control data set for said injection molding machine with respect to;

a destination table stored in said production lot data memory means showing a destination of said data corresponding to a result of judgment of said judging means;

control means for controlling said injection molding machine in accordance with said control data stored in said production lot data memory means;

another memory means for storing a plurality of sets of said production lot data regarding various production lots; and

storing means for determining a destination of said production lot data based on the result of judgment of said judging means by referring to said destination table stored in said production lot data memory means;

said storing means transferring to said production lot data memory means said production lot data whose destination has been determined.

5. The control apparatus according to claim 4 wherein said another memory means stores a plurality of production conditions of said injection molding machine.

6. The control apparatus according to claim 4 wherein said judging means comprises a plurality of comparators which compare said signal with an upper limit value and a lower limit value of said permissible range.