| 摘要 |
A die head for blow moulding hollow plastic products has radially adjustable control elements for varying the die orifice and a centring ring (2) concentrically surrounding the die ring (4). A first control element (7) attached to the centring ring (2) moves the die ring (4) in the X-direction while a second control element (8) at a right angle to the first (7) simultaneously moves the centring ring (2) and die ring (4) normal to the X-direction (Y-direction). Preferably, both control members (7, 8) form a crossed table-like stroking unit. A load-applying unit (12) of the first control element (7) has a bolt (17) connected to the die ring (4) and a load applying unit (22) of the second control element (8) has a guide bolt (23) passing through the centring ring (4) with the front end making a non-positive connection with the outer face of the die ring (4). Both control elements (7, 8) and their load-applying units (12, 22) have similar construction and both are supported between parallel rods (11, 21). |
