摘要:
A machine for making thermoplastic containers by drawing and blowing a preform including at least a drawing rod which is slidably controlled along its axis (An) by an actuator from a retracted position to a maximum drawing position to draw the preform during the blowing process. When the drawing rod returns toward its retracted position, the actuator is idle, the rod return being ensured by the blowing pressure prevailing inside the container being produced and acting on the working end of the rod.
摘要:
A blow molding apparatus and a nozzle operable to provide fluid into an interior of a blank. The blank is supported in a mold such that a neck of the blank emerges from a wall of the mold. The nozzle includes a nozzle tip and an opening that surrounds the neck of the blank. A peripheral edge of the opening comes to rest on the mold and a seal is provided between the opening and the mold. In one embodiment, the seal is held on the nozzle by a locking ring.
摘要:
A gas injector including a tube extending into the hollow enclosure of a housing. The hollow enclosure of the housing is connected with gas pressure. The outside end of the tube being extendable into the cavity of a plastic material injection mold. That end of the tube defines a valve seat. A valve is seatable on the seat. A rod on the valve extends through the tube into the hollow enclosure of the housing. A spring in a cup shape support normally urges the rod to move the valve onto the valve seat. A solenoid plunger acting on the rod and activated by an electromagnet moves the rod against the spring to raise the valve off the valve seat.
摘要:
The procedure serves the purpose of molding a container from a thermoplastic material. After a temperature treatment a moldable object is fed to a blow station, which has a blow mold that is provided for the purpose of contouring the container. The temperature-treated moldable object is inserted into the blow mold. By feeding in high-pressure blow air, the moldable object is expanded. In addition at least one other pneumatic working step with low-pressure air is carried out, with this air being taken from a low-pressure air supply. The low-pressure air supply has a smaller pressure level than the high-pressure blow-air supply. After the moldable object has been expanded, high-pressure blow air streaming out of the molded container held in the blow mold is fed to the low-pressure air supply during a transition phase. In the region of the low-pressure air supply a pressure monitoring is carried out for the purpose of defining a maximum low-air pressure to be provided. After the transition phase a venting of the container that is held in the blow mold is performed vis-a-vis an ambient pressure.
摘要:
The procedure is designed for the pneumatic operation of a device in which at least one structural element is pneumatically actuated. The actuation is done by primary working air, which is fed to the pneumatic structural element from a primary working-air supply. In addition to the primary working-air supply at least one secondary working-air supply is used, which is provided with a lower pressure level than that of the primary working-air supply. After the execution of a working operation by a pneumatic structural element by means of a compressed-air supply from the primary working-air supply, during a transition phase a venting into the secondary working-air supply is carried out. After the transition phase a venting of the first pneumatic structural element vis-a-vis an ambient pressure is carried out. A second pneumatic working operation is powered by air from the secondary working-air supply.
摘要:
In a delivery apparatus in a machine for preparing hollow vessels by delivering mandrels supporting thereon preforms and vessels through a preform-heating zone and a draw-blow-forming zone, the downward movement of a mandrel-clamping mechanism is utilized for insertion of a preform into the mandrel and the rising movement of the clamping mechanism is utilized for withdrawal of a formed vessel. By this arrangement, insertion and fixation of preforms into mandrels and withdrawal of formed vessels from mandrels can be performed continuously, assuredly and smoothly in one apparatus while saving the waste in the blow-forming operation. If the operation of reversing the clamping mechanism is added, any particular device need not be disposed for reversing preforms.
摘要:
A plant for producing articles by drawing-blowing of preforms in plastic material comprising a transport device for the preforms comprising independent supports (2,3) each receiving a preform and sliding in guides (1) forming a polygonal shape under the action of corner jacks (22, 23). The length of the path can be modified by adding portions of sliding rails (1) and the distance between centers of two adjacent preforms can be modified along the whole path.
摘要:
A blow-moulding installation (10) for fabricating a container from a blank (12), includes a mould (20) which bounds a moulding cavity (18) in which a blank (12) is arranged, emerging through an opening of the mould (20), a tubular blowing nozzle (28) slidingly mounted between a raised rest position, and a lowered blowing position, in which the nozzle (28) is suitable for conveying a pressurized fluid into the blank (12), at least one element (46a) for locking the nozzle (28) in its lowered blowing position, the locking element (46a) being such as a lock (46a) including a strike (48a) and a movable bolt (58a) which is elastically returned to a locking position in the strike.
摘要:
A blow-moulding installation (10) for fabricating a container from a blank (12), includes a mould (20) which bounds a moulding cavity (18) in which a blank (12) is arranged, emerging through an opening of the mould (20), a tubular blowing nozzle (28) slidingly mounted between a raised rest position, and a lowered blowing position, in which the nozzle (28) is suitable for conveying a pressurized fluid into the blank (12), at least one element (46a) for locking the nozzle (28) in its lowered blowing position, the locking element (46a) being such as a lock (46a) including a strike (48a) and a movable bolt (58a) which is elastically returned to a locking position in the strike.
摘要:
A blow-molding installation for manufacturing receptacles from blanks of thermoplastic polymer, said installation comprising a bell-nozzle for blowing a fluid under pressure into a blank (3) disposed in a cavity (2) of a mold (1), the end of the nozzle being in the shape of a bell (11) which is suitable, during blow-molding, for being pressed into leaktight end-to-end abutment against a wall (F) of the mold while capping the neck (7) of the blank that emerges from said wall; said installation further comprises means (161) for securing the nozzle to the wall of the mold by mutual attraction, which means can be activated, after the nozzle has been brought into end-to-end contact with the wall (F) of the mold without flattening a sealing gasket (13), so as to attract the nozzle (10) and the wall (F) towards each other with an attraction force greater than the repulsion force due to the pressure of the blow-molding fluid.