| 摘要 |
A nozzle comprises a hollow element comprising a recess and an injection hole ( 6 ) to inject fluid plastic into a mould, a heating tip which penetrates inside the recess and forms, together with the recess itself, a holding cavity ( 5 ) into which the channels ( 14 ) run. The holding cavity ( 5 ) comprises narrow section ( 52 ) which separates the holding cavity ( 5 ) into a rear portion ( 51 ) and a front portion ( 50 ), in order to reduce or completely prevent exchanges of fluid plastic between the two areas. |
