How to determine the airtightness of vertical injection molding machine
Sealing is the basic function of the machine, for injection molding machine, two sealing must be a cause for concern, is the system pressure of sealing machine and the sealing of injection screw system, the former bad sealing pressure in the system, which caused bad sealing leak adhesive, today our question is how to determine the sealing?
1. How to determine whether the vertical injection molding machine is pressure relief?
Adjust the die too tight with the die, that is, the machine can always keep the high pressure lock but can not lock. Adjust the pressure flow of the high pressure lock to the maximum, manually press the mold lock key, keep pressing and do not loosen, observe the pressure gauge, whether the pointer can be kept still, if the pointer will not slowly decline, it means that there is no pressure relief on the oil pump, if the pointer slowly decline, it means that there is pressure relief on the oil pump
2. How to determine the tightness of screw system (check ring/screw tightness)
Melt glue finished in production, and extend for a while, determine the product and runner system completely cooling, change semi-automatic to manual, began to shoot glue, at the same time observe the position of the screw, if the screw slowly forward, that there is no leakage of glue screw system, otherwise there is no leakage of glue.