Injection moulding unit comprises a nozzle with an insert, a surrounding sleeve with channels for the supply of liquid plastic, and axial inlet channels

摘要

An arrangement for use in the injection moulding of plastics (2), comprises a nozzle (3) with an insert (4) and a surrounding sleeve (5) with channels (6,7) for the supply of plastic in liquid form, to the front injection section (18) of the nozzle. A number of axial inlet channels run between the insert and the surrounding sleeve, and a gap (10) leading to an axial groove acts as a filter. An arrangement for use in the injection moulding of plastics (2), comprises a nozzle (3) with an insert (4) and a surrounding sleeve (5) with channels (6,7) for the supply of plastic in liquid form, to the front injection section (18) of the nozzle. A number of axial inlet channels run between the insert and the surrounding sleeve, and a gap (10) leading to an axial groove acts as a filter. Bore holes run from the grooves to the front section, and a mantle surface surrounds the insert. The sleeve and the insert can be adjusted relative to each other, to achieve the desired filter gap. The mantle surface has a number of axial cut outs, and the number of cut outs corresponds to the number of grooves.