Nozzle Unit Setting depends on your requirements you can set up the nozzle/injection unit to retract after injection has finished. The controller offers you 3 different modes to choose from if nozzle/injection unit retraction is needed.
Nozzle Settings Process of Plastic Injection Molding Machine
Press manual key 
on the controller panel of plastic injection molder，to activate the Manual operation mode. Switch the HMI display to the Nozzle setting screen by pressing F7(Nozzle)
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Nozzle Setting Screen of Injection Molding Machine
First step please click to set the nozzle retraction mode, After Charge mode: retract the nozzle /Injection unit after charge (plasticizing) is finished. Before Mold Opening mode: retract the nozzle /Injection unit before mold opening start. After Injection mode: retract the nozzle /injection unit after injection has finished.
If the setting is “not necessary” then the nozzle is not operating.
Second step please set the pressure and speed for nozzle/injection forward. Its speed can be divided into 2 stages, high speed and low speed. During the nozzle/injection unit forward, the high speed is used until the preset end-position is reached. Thereafter the nozzle /Injection unit will move forward in low speed until the nozzle touches the mold sprue gate.
When the Nozzle/Injection Unit moves forward near to the end position, the speed will be changed into low speed. It is important to allow for a safety margin of at least 20mm between the set End Position and the actual contact point of nozzle and mold. If the End position is set too close to the contact point of nozzle and plastic mold, the nozzle might not slow enough before touching the injection mold that may damage the mold and shut off.
If you set the retract end position to “0”, the Nozzle/Injection unit will retract to the end, so please set the value of forward end position greater than “0”.
After setting all parameters for Nozzle/Injection Unit, please try to test all the presetting under Manual mode if they are satisfied according to your requirements.
