Monitor for injection molding machine

• US 7,261,009 B2
• Filed: 12/03/2004
• Issued: 08/28/2007
• Est. Priority Date: 01/15/2003
• Status: Expired due to Fees

• Current Assignee: Fanuc Ltd (Fanuc Corporation)
• Original Assignee: Fanuc Ltd (Fanuc Corporation)
• Inventors: Saito, Osamu, Araki, Kenji
• Primary Examiner(s): RAEVIS, ROBERT R
• Application Number:
  US11/002,309
• Publication Number:
  US 20050092113A1
• Time in Patent Office: 998 Days
• Field of Search: 738/659, 738/658, 738/663, 264 39- 407
• US Class Current: 73/866.3
• CPC Class Codes: B29C 2045/7606 Controlling or regulating the display unit
• CPC Class Codes: B29C 2945/76006 Pressure
• CPC Class Codes: B29C 2945/7602 Torque
• CPC Class Codes: B29C 2945/7604 Temperature
• CPC Class Codes: B29C 2945/76073 termination
• CPC Class Codes: B29C 2945/76083 Position
• CPC Class Codes: B29C 2945/7611 Velocity
• CPC Class Codes: B29C 2945/7612 rotational movement
• CPC Class Codes: B29C 2945/76187 screw
• CPC Class Codes: B29C 2945/76204 injection piston cylinder
• CPC Class Codes: B29C 2945/7621 nozzle
• CPC Class Codes: B29C 2945/76244 ejectors
• CPC Class Codes: B29C 2945/76381 Injection
• CPC Class Codes: B29C 2945/76387 Mould closing
• CPC Class Codes: B29C 2945/76394 Mould opening
• CPC Class Codes: B29C 2945/76551 Time
• CPC Class Codes: B29C 2945/76682 injection piston cylinder
• CPC Class Codes: B29C 2945/76688 nozzle
• CPC Class Codes: B29C 45/768 Detecting defective moulding conditions B29C45/84 takes precedence
• CPC Class Codes: G01D 7/10 giving indication in co-ordinate form

Abstract

Variables such as injection pressure and injection velocity are detected at a predetermined sampling cycle for each molding cycle and the variables for a plurality of past molding cycles starting from the latest molding cycle are stored. Change patterns of the stored variables of the respective molding cycles are displayed in the form of graphs in which the first axis represents time (the number of times of sampling), the second axis represents the variable values, and the third axis represents the molding cycle.

Claims

1. A monitor for an injection molding machine, comprising:

sampling means for detecting, in each of successive molding cycles a molding cycle variable, varying in each molding cycle in an injection molding process, and storing the detected variable;

means for storing an end of cycle time for each molding cycle; and

means for graphically displaying the detected variables for a plurality of molding cycles, with a first axis representing time, a second axis representing said detected variables and a third axis representing said molding cycles.

2. The monitor for an injection molding machine according to claim 1, wherein the sampling means is provided in the injection molding machine.

3. The monitor for an injection molding machine according to claim 1, wherein the sampling means is outside the injection molding machine and connected to the injection molding machine.

4. The monitor for an injection molding machine according to claim 1, wherein said graphically displaying means is provided in the injection molding machine.

5. The monitor for an injection molding machine according to claim 1, wherein said graphically displaying means is outside the injection molding machine and connected to the injection molding machine.

6. The monitor for an injection molding machine according to claim 1, wherein said variable is a difference between a sampled variable and a reference variable which is a variable in a specific molding cycle.

7. The monitor for an injection molding machine according to claim 1, wherein the variable varying in one molding cycle in the injection molding process includes one of injection pressure, injection velocity, a screw position, screw rotation speed, backpressure, motor torque, a mold opening or closing position, a mold opening or closing speed, an ejector position or speed, and temperatures of a cylinder or a nozzle.