Nozzle Melt glue usually flows from the nozzle into the nozzle, but in some Laboratory Plastic Ware Mould, the nozzle is part of the laboratory plastic ware mould because it extends to the bottom of the laboratory plastic ware mould. There are also two main types of nozzles: open nozzles and closed nozzles. In injection laboratory plastic ware moulding production, open nozzles should...