Patent ID: 11883986
Assignee: KRAUSSMAFFEI TECHNOLOGIES
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. Method according to claim 1, wherein in order to reach the target mould internal pressure curve pwkz,soll(t) in the current injection-moulding cycle, the target holding-pressure curve pmasse,Hld,soll(t) required for this in the current injection-moulding cycle is calculated according to one of the following formulae, a
                            )
                          
                          ⁢
                          
                            
                          
                          ⁢
                          
                            
                              p
                              
                                masse
                                ,
                                Hld
                                ,
                                soll
                              
                            
                            ⁡
                            
                              (
                              t
                              )
                            
                          
                        
                        =
                        
                          
                            
                              
                                
                                  p
                                  
                                    wkz
                                    ,
                                    soll
                                  
                                
                                ⁡
                                
                                  (
                                  t
                                  )
                                
                              
                              
                                
                                  ∫
                                  
                                    t
                                    ⁢
                                    
                                      
                                    
                                    ⁢
                                    2
                                  
                                  
                                    t
                                    ⁢
                                    
                                      
                                    
                                    ⁢
                                    3
                                  
                                
                                ⁢
                                
                                  
                                    p
                                    
                                      wkz
                                      ,
                                      ref
                                    
                                  
                                  ⁡
                                  
                                    (
                                    t
                                    )
                                  
                                
                              
                            
                            ·
                            
                              
                                ∫
                                
                                  t
                                  ⁢
                                  
                                    
                                  
                                  ⁢
                                  2
                                
                                
                                  t
                                  ⁢
                                  
                                    
                                  
                                  ⁢
                                  3
                                
                              
                              ⁢
                              
                                
                                  p
                                  
                                    masse
                                    ,
                                    Hld
                                    ,
                                    ref
                                  
                                
                                ⁡
                                
                                  (
                                  t
                                  )
                                
                              
                            
                          
                          =
                          
                            
                              
                                p
                                
                                  wkz
                                  ,
                                  soll
                                
                              
                              ⁡
                              
                                (
                                t
                                )
                              
                            
                            ·
                            
                              k
                              2
                              
                                -
                                1
                              
                            
                          
                        
                      
                      ⁢
                      
                        

                      
                      ⁢
                      
                        
                      
                      ⁢
                      or
                      ⁢
                      
                        

                      
                      ⁢
                      b
                    
                    )
                  
                  ⁢
                  
                    
                  
                  ⁢
                  
                    
                      p
                      
                        masse
                        ,
                        Hld
                        ,
                        soll
                      
                    
                    ⁡
                    
                      (
                      t
                      )
                    
                  
                
                =
                
                  
                    
                      
                        
                          p
                          
                            wkz
                            ,
                            soll
                          
                        
                        ⁡
                        
                          (
                          t
                          )
                        
                      
                      
                        p
                        
                          wkz
                          ,
                          ref
                          ,
                          avg
                        
                      
                    
                    ·
                    
                      p
                      
                        masse
                        ,
                        Hld
                        ,
                        ref
                        ,
                        avg
                      
                    
                  
                  =
                  
                    
                      
                        p
                        
                          wkz
                          ,
                          soll
                        
                      
                      ⁡
                      
                        (
                        t
                        )
                      
                    
                    ·
                    
                      k
                      2
                      
                        -
                        1
                      
                    
                  
                
              
              ⁢
              
                

              
              ⁢
              
                
              
              ⁢
              or
              ⁢
              
                

              
              ⁢
              c
            
            )
          
          ⁢
          
            
          
          ⁢
          
            
              p
              
                masse
                ,
                Hld
                ,
                soll
              
            
            ⁡
            
              (
              t
              )
            
          
        
        =
        
          
            
              
                
                  p
                  
                    wkz
                    ,
                    soll
                  
                
                ⁡
                
                  (
                  t
                  )
                
              
              
                p
                
                  wkz
                  ,
                  ref
                
              
            
            ·
            
              p
              
                masse
                ,
                Hld
                ,
                ref
              
            
          
          =
          
            
              
                p
                
                  wkz
                  ,
                  soll
                
              
              ⁡
              
                (
                t
                )
              
            
            ·
            
              k
              2
              
                -
                1
              
            
          
        
      
    
    
      
        
      
    
  

wherein pmasse,Hld,ref is a holding-pressure parameter, pmasse,Hld,ref(t) is the holding-pressure curve, pmasse,Hld,ref,avg is an average of the holding pressure and pwkz,ref,avg is an average of the mould internal pressure of the accepted-part reference injection-moulding cycle.