Distribution system for injection moulding

An injection moulding system, comprising:

• a supply system for generating liquid plastic material;
• a mould;
• a distribution system for distributing the liquid plastic material from the supply system to the mould;
• wherein the distribution system comprises:
• an inlet for receiving pressurized liquid plastic material;
• at least a first nozzle and a second nozzle for injecting liquid plastic material into a mould cavity;
• a hotrunner distributor for distributing the liquid plastic material from the inlet over a first flow path to the first nozzle and over a second flow path to the second nozzle, said nozzle comprising a nozzle valve for closing an outlet of the nozzle;
• a distributor valve for closing the second flow path before the second nozzle;
• wherein the distribution system is adapted for sequentially injecting liquid plastic material into the mould cavity via the first flow path and the second flow path;
• wherein the distribution system is adapted for reducing pressure energy of liquid plastic material in the distributor, when liquid plastic material is injected into the mould cavity via the first flow path.

A method for injection moulding, comprising the steps of:

• pressing liquid plastic material into a distribution system of an injection moulding system;
• injecting liquid plastic material over a first nozzle into a mould cavity, wherein the liquid plastic material is flowing over a first flow path to the first nozzle, while preventing liquid plastic material to enter a second flow path to a second nozzle;
• opening a distributor valve such that liquid plastic material enters the second flow path;
• closing the nozzle after the opening of the distributor valve;
• injecting liquid plastic material over the second flow path into the mould cavity.