Resin supply systems

A method for injecting material into a mould using an injector assembly, the method comprising the steps of:

• connecting a pouch containing material to be injected to an injector head of an injector assembly, the injector assembly comprising:
• a housing having a distal end and a proximal end;
• a chamber formed within the housing, the chamber configured to have an adjustable volume;
• a piston located at the distal end of the housing and configured for adjusting the volume of the chamber by movement thereof relative to the proximal end of the housing;
• an injector head configured for retaining a pouch within the housing wherein the pouch comprises a body portion configured to form a material reservoir for an injectable material, and a connector portion configured to be in fluid communication with the body portion for providing a material supply from the material reservoir in the body portion, and wherein the body portion is configured to be compressible to provide the material supply through the connector portion in accordance with applied hydrostatic pressure;
• and
• a motor configured to control the movement of the piston within the chamber;
• the chamber is holding a fluid;
• the injector head retaining the pouch within the chamber of the housing such that the fluid is around the pouch;
• the motor controlling movement of the piston within the chamber to apply a hydrostatic pressure to the pouch by applying hydrostatic pressure in the fluid around the pouch by adjusting the volume of the chamber;
• connecting the pouch to a mould;
• compressing the pouch via the movement of the piston within the chamber to dispense material from the pouch for the mould, by filling the chamber with a predetermined amount of fluid and pressurising the fluid in the chamber so as to transfer pressure from the fluid to the pouch to dispense the material therefrom;
• and
• sensing a hydrostatic pressure within the fluid in the chamber via a pressure sensor disposed within the chamber.