Production Machine

Abstract

The invention relates to a production machine with a hydraulic and/or electric drive and also measured data acquisition for at least one positional determination and at least two measured variables dependent on the latter in the production machine. If a further setpoint profile is exceeded, a setpoint input is corrected directly in the form of a substitutional open-loop or closed-loop control.

1 - 18 . (canceled)  
   
   
       19 . A production machine system comprising: 
 a drive,    a control unit for controlling said drive, and    detectors for detecting first and second variables generated during the operation of the machine, said variables fed to said control unit, said control unit comprising a first determination unit to receive said first variable and generate a first setpoint, a conversion unit for generating an intermediate setpoint from said first variable, the second variable being subtracted from said intermediate set point to generate a second setpoint, wherein a machine control unit receives said first and second setpoints to generate a machine control parameter, wherein the drive advances a screw for driving an injection and generating an injection pressure, and wherein the first variable is a position of said drive and the second variable is said injection pressure.    
   
   
       20 . A production machine system according to  claim 19 , wherein the drive is selected from the group consisting of hydraulic, electric and a combination of hydraulic and electric drives.  
   
   
       21 . An injection molding machine system for the manufacture of plastic parts comprising: 
 a motor driven advancing screw for driving the injection and generating an injection pressure,    means for detecting and registering the injection pressure and position of said screw as measured variables during operation, and    control means generating a first setpoint from said position variable by a speed/displacement profile and a first intermediate pressure variable from said position variable by a pressure/displacement profile, the pressure variable being subtracted from said first intermediate pressure variable to generate a second setpoint, wherein said first and second setpoints are fed to a machine control unit for generating a motor control parameter for said motor.    
   
   
       22 . The injection molding machine according to  claim 21  further comprising a mold having at least two positionally dependent variables, wherein at least one speed/displacement profile variable can be predetermined as a positionally dependent setpoint value which can be counteracted if a mold closing pressure/displacement profile variable is exceeded.  
   
   
       23 . The injection molding machine according to  claim 22  further comprising an ejection mechanism in association with the mold, wherein said mechanism has at least two positionally dependent variables and wherein at least one speed/displacement profile variable can be predetermined as a positionally dependent setpoint valve which can be counteracted if an ejecting force/displacement profile variable is exceeded.  
   
   
       24 . A production machine system according to  claim 19 , wherein the drive advances a screw for driving an injection and generating an injection pressure, and wherein the first variable is a position of said drive and the second variable is said injection pressure.  
   
   
       25 . A injection molding machine system according to  claim 21 , wherein the first pressure profile is a pressure/displacement profile.  
   
   
       26 . A injection molding machine system according to  claim 21 , wherein the speed/displacement profile and/or the pressure/displacement profile can be predetermined.  
   
   
       27 . The production machine according to  claim 19  comprising the machine components of an industrial press.  
   
   
       28 . A method for the open-loop control of a production machine comprising the steps of: 
 determining a first setpoint from at least a first variable by a speed/displacement profile;    determining an intermediate setpoint from said first variable by a pressure/displacement profile,    subtracting a second variable from said intermediate setpoint to generate a second setpoint; and    generating a machine control parameter from said first setpoint and said second setpoint.    
   
   
       29 . The method according to  claim 28 , wherein the first setpoint is determined by a speed/displacement profile, and the first internal variable is determined by a pressure/displacement profile.  
   
   
       30 . A method according to  claim 29  wherein the injection-molding machine further comprises a mold the positional determination of which is a function of the closing/opening speed and for the opening and/or closing pressure of the mold.  
   
   
       31 . A method according to  claim 30  wherein the mold further comprises an ejection mechanism, the positional determination of which is a function of the speed and/or ejection force of the ejection mechanism.  
   
   
       32 . The method according to  claim 29  for use with an injection molding machine according to claim  6 .  
   
   
       33 . The method according to  claim 29  for use with the injection molding machine according to claim  7 .  
   
   
       34 . The method according to  claim 32  wherein at least one profile is predetermined.  
   
   
       35 . The method according to  claim 33  wherein at least one profile is predetermined.  
   
   
       36 . The method according to  claim 28  for use with an industrial press.  
   
   
       37 . A production machine system according to  claim 19 , further comprising a further detector for determining a third variable, wherein said conversion unit comprises a second determination unit to generate a first internal variable and a third determination unit to generate a second internal variable from said third variable, and a select unit, controlled by a threshold derived from said first variable, to select said first or second internal variable to generate said intermediate setpoint.  
   
   
       38 . A production machine system according to  claim 37 , further comprising a subtraction unit for subtracting said second variable from said selected first or second internal variable, and a function unit for generating said second setpoint receiving an output signal from said subtraction unit.  
   
   
       39 . A production machine system according to  claim 38 , wherein the select unit further selects a first or second parameter set which is fed to said function unit.  
   
   
       40 . A production machine system according to  claim 19 , further comprising a mold, wherein the drive positions of said mold and the first variable is a position of said mold and the second variable is a mold closing pressure.  
   
   
       41 . A production machine system according to  claim 19 , further comprising an ejection mechanism, wherein the drive controls an ejection and the first variable is a position of said ejection mechanism and the second variable is an ejecting force.  
   
   
       42 . A method according to  claim 29 , wherein the first variable is the position of a mold, and the first setpoint is a function of the closing/opening speed, and the second variable is a opening and/or closing pressure of the mold.  
   
   
       43 . A method according to  claim 29 , wherein the first variable is the position of an ejection mechanism of a mold, the first setpoint is a function of the speed of the ejection mechanism, and the second variable is an ejection force of the ejection mechanism.  
   
   
       44 . A method according to  claim 28 , further comprising the steps of: 
 generating a second internal variable from a third variable;    selecting either said first or second internal variable for determining said intermediate setpoint depending on a threshold derived from said first variable.    
   
   
       45 . A method according to  claim 44 , further comprising the step of feeding said corrected intermediate setpoint to a function unit for generating said second setpoint.  
   
   
       46 . A method according to  claim 45 , wherein said function unit is controlled by a parameter and wherein the parameter is selected by said threshold.  
   
   
       47 . An injection molding machine system according to  claim 21 , further comprising a further detector for determining a time variable, wherein the control means generates a second intermediate pressure variable from said time variable, and selects depending on a threshold derived from said position variable said first or second intermediate pressure variable for generating said second setpoint.  
   
   
       48 . A process machine control system comprising: 
 a control unit,    a group of sensors in communication with said control unit and various components of the process, said sensors comprising a screw position sensor, optionally a heat sensor to sense the temperature of heating elements located around an area of the screw, an injection pressure sensor to sense the pressure at an end of the screw, a mold holder position sensor, a mold ejector position sensor, and a mold holder motor sensor, wherein said control unit, based on signals from said sensors, controls and adjusts the current to a motor driving a screw.