摘要:
Apparatus for producing plastic containers by stretch blowing including a rotatable rotor and at least one distributor block connected to the rotor. The distributor block has a mixing chamber that can be directly connected to an internal space of a preform so that a combustion chamber is formed from the mixing chamber and the internal space of the preform. A feed device is provided for feeding an explosive fluid into the combustion chamber and a firing device is provided for firing the explosive fluid in the combustion chamber. Of importance is that the distributor block can be connected directly to a preform or to a formed container. The apparatus is desirably a round rotor machine with a rotatable carousel for receiving a plurality of distributor blocks having a mixing chamber that can be directly connected to an internal space of a preform. The distributor blocks are desirably arranged in such a way that they can be rotated together with the carousel. The invention also includes an apparatus, in particular a round rotor machine, for coating the inside walls of a plastic container with a barrier layer which is impermeable in relation to gases, aroma substances and the like, in which a stretch blowing mould is connected by way of a connecting portion to valve-controlled fluid lines in order to fill the container in the mould with at least one gas.
摘要:
A vacuum valve for use with a blow mold in an I.S. machine. When the blow molds close around a parison, vacuum is applied to the wall of the blow mold. At some time following the application of the vacuum, final blow will occur blowing the parison into a bottle. This vacuum will be applied until the parison has been blown into a bottle. During the period during which vacuum is applied but final blow has not started, vacuum is reduced by operating a needle valve in the vacuum line.
摘要:
The invention is a pressure reducing valve for reducing the pressure supplied to a head tooling hydraulic positioning valve and a controller for bypassing the pressure reducing valve in a blow-molding machine. A pressure-reducing valve and electrical controller are used to regulate the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine. The invention reduces pressure during all time intervals except during a “parison formation” interval of the cycle. The invention is also a process for regulating the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine and for bypassing the pressure reducing valve in a blow-molding machine.
摘要:
A driving device for moulds for the production of containers, for example, bottles or the like made of polyethylene, polypropylene or other plastic materials, in which the moulds (2) consist of two half-shells (3) designed to be brought together and pressed against one another along outer profiles (4), has a unit (7) which drives the movement of the half-shells (3), to which an electric main drive and a mechanical auxiliary drive, in particular hydraulic or pneumatic, are connected.
摘要:
The invention is a pressure reducing valve for reducing the pressure supplied to a head tooling hydraulic positioning valve and a controller for bypassing the pressure reducing valve in a blow-molding machine. A pressure-reducing valve and electrical controller are used to regulate the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine. The invention reduces pressure during all time intervals except during a nullparison formationnull interval of the cycle. The invention is also a process for regulating the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine and for bypassing the pressure reducing valve in a blow-molding machine.
摘要:
The internal depressurization of thermoformed containers (C) is performed by means of the secondary suction circuit of a Venturi meter or ejector (15), the primary circuit of which is passed through by compressed air at pressure values regulated by a proportional valve (19) controlled by an electronic control unit (10) which detects the internal pressure or vacuum of the containers by means of a transducer (9) which is programmed by means of a special apparatus (11) and which, upon reaching of the predetermined vacuum inside the containers, activates means (Z) for closing the end portion of the said thermoformed containers. By means of a barometric sensor (21), the electronic control unit is also able to detect the atmospheric pressure of the working environment of the thermoforming machine, and the said control unit, upon a variation in the atmospheric pressure, automatically corrects the vacuum value associated with operation of the said closing means (Z), following a law whereby the said vacuum varies in an inversely proportional manner with respect to the variations in the atmospheric pressure.
摘要:
A transfer valve comprising three ports including a first, second, and third ports 17, 18, and 19 includes a pilot supply channel 22 for supplying a pilot fluid to a pilot valve 13, and the pilot supply channel 22 is connected to the first and the third ports 17 and 19 via check valves 41, 42, and 43, respectively.
摘要:
In the process of raising elongated thermoplastic preforms to molding temperature by programming heat from vertically adjacent heaters at different temperatures into vertical zones of rotating preforms advancing before the heaters, the improvement of preventing heat waves emanating from one heater toward an oppositely disposed preform zone from overlapping into an area through which waves are issuing from the next adjacent heater. The apparatus includes blind members between immediately adjacent heaters extending toward the preforms to concentrate heat onto the oppositely disposed preform zone.