Plastic Injection Gate Types - 1편

Gate Types 

 

♣  Manual Trim

•  Edge
•  Tab
•  Sprue
•  Diaphragm
•  Ring
•  Fan
•  Flash

 

Edge Gate

 

     ●     Most common manual trim gate

     ●     Nominal thickness 50% to 75% nominal wall 

     ●    Can be constant thickness or tapered

     ●    Modeled as a 2-noded beam element

 

 

Tab Gate

     

     ●    Gate goes into tab that goes to the part

     ●    Similar to edge gate

     ●    Used to lower shear stress in the part

            ·  Stress stays in the tab

 

 

Sprue Gate

 

     ●    Sprue directly into part  

     ●    Size at part dependant on sprue orifice size

     ●    Modeled with beam elements

 

 

Diaphragm Gate

 

   

      ●    Used to gate into the inside diameter of round parts

     ●    Normally has thin land at part

     ●    Modeled with shell elements

 

 

 

Ring Gate

 

   

     ●    Like a diaphragm gate but is for the outside of the part

     ●    Not recommended

              ·  Difficult to get even flow

     ●   Modeled with beams and shells

 

 

Fan Gate

 

     ●   Wide edge gate

     ●   Balanced to achieve a flat flow front entering the part

     ●   Normally modeled with shells and beams

 

 

 

Flash Gate

 

 

      ●    Similar to ring and fan gates

      ●    Designed to have flat flow front entering part

            ·  Difficult to achieve

      ●    Not recommended

      ●    Modeled with shells and beams