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

Claim 6:
7. Method according to claim 1, wherein a dependence (k2) between mould internal pressure pwkz and compound pressure pmasse during the holding-pressure phase in the accepted-part reference injection-moulding cycle and in the current injection-moulding cycle is determined as a pressure transmission characteristic, according to at least one of the formulae, a
                      )
                    
                    ⁢
                    
                      
                    
                    ⁢
                    
                      k
                      2
                    
                  
                  =
                  
                    
                      
                        ∫
                        
                          t
                          ⁢
                          
                            
                          
                          ⁢
                          2
                        
                        
                          t
                          ⁢
                          
                            
                          
                          ⁢
                          3
                        
                      
                      ⁢
                      
                        
                          p
                          
                            
                              w
                              ⁢
                              k
                              ⁢
                              z
                            
                            ,
                            Hld
                          
                        
                        ⁡
                        
                          (
                          t
                          )
                        
                      
                    
                    
                      
                        ∫
                        
                          t
                          ⁢
                          2
                        
                        
                          t
                          ⁢
                          
                            
                          
                          ⁢
                          3
                        
                      
                      ⁢
                      
                        
                          p
                          
                            mαsse
                            ,
                            Hld
                          
                        
                        ⁡
                        
                          (
                          t
                          )
                        
                      
                    
                  
                
                ,
                
                  

                
                ⁢
                b
              
              )
            
            ⁢
            
              
            
            ⁢
            
              k
              2
            
          
          =
          
            
              p
              
                wkz
                ,
                Hld
                ,
                avg
              
            
            
              p
              
                mαsse
                ,
                Hld
                ,
                avg
              
            
          
        
        ⁢
        
          

        
        ⁢
        c
      
      )
    
    ⁢
    
      
    
    ⁢
    
      k
      2
    
  
  =
  
    
      p
      
        wkz
        ,
        Hld
      
    
    
      p
      
        
          m
          ⁢
          a
          ⁢
          s
          ⁢
          s
          ⁢
          e
        
        ,
        Hld
      
    
  

wherein:
pmasse,Hld(t) is the compound pressure curve during the holding-pressure phase
pwkz,Hld(t) is the mould internal pressure curve during the holding-pressure phase,
t2 is a time at or after the switch-over point, being the switch-over time tinj/umschalt and
t3 is the time of the end of the holding-pressure phase tHld,End or a time before the end of the holding-pressure phase but after t2.