Blow Moulding Machine For The Manufacture Of Hollow Bodies In Thermo-Plastic Material
Blow moulding machine for the manufacture of hollow bodies in thermo-plastic material.
In one type of known blow moulding machine, an extruder and a mould are both in fixed positions. In one design, the mould is directly below the head of the extruder. This means that continuous extrusion of a tube is not possible, as extrusion can only take place when the mould is open. When the mould is closed, the extrusion process must be interrupted. In a further design, the mould is at some distance blow moulding machinery. This system does not allow continuous extrusion. A transfer mechanism must be provided to remove the end of the tube from the extruder head and lower it into the open mould. When the mould is closed, the transfer mechanism moves upwardly and takes from directly below the extruder head a fresh tube end and then lowers this into the mould. In this design the blowing must be carried out from underneath. In a further design, the mould is below and laterally displaced from the extruder. Here, too, a transfer blow mold machine is necessary, but in this case it must perform with vertical and horizontal movements to take a tube end from the extruder head and transport it to the mould. As a result of this horizontal and then vertical movement to bring the tube into the mould, the additional risk of the tube oscillating occurs. In this case, the blowing process can be carried out from above. Moreover, a mould can be fitted on each side of the extruder, making a much faster extrusion process. In a further design, the extruder is in a fixed position and the mould is movable.
In a further design ofblow moulding machines of this type, the extruder is movable and the mould is fixed. Here, the mould and the extruder lie on the same axis. The extruder must be movable vertically in an upward and downward direction. Blowing is only possible from underneath. Moreover, only one mould can be used.
In yet a further design, both the extruder and the mould are movable. Here, the mould travels in a circuit around a vertical or horizontal axis and the extruder is movable in an upward and downward direction. A transfer mechanism is not necessary, continuous extrusion is possible and a number of moulds can be used by being placed on a table, which is rotatable through a vertical or a horizontal axis.
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This article gives a brief idea about molding machine. It also tells the application which uses it. It also describe the types of moulding machine and its uses.
There are four kinds of PET Blow Molding Machinerie: Single Stage Blow Molding Machine; Two Stage Blow Moulding Machine; Integrated Two Stage Blow Molding Machine; PET Blow Molding Machinery
A blow moulding machine for blowing thermoplastic containers starting with a previously injected preform, comprising several blowing stations each of which can bear a double cavity mould
An extrusion blow moulding machine, including several molding units borne by a carrousel rotating about a substantially vertical axis (A1), wherein each molding unit is mounted on the carrousel such that it can be tilted about a substantially horizontal axis.
Since it is essentially 2 forming processes combined into 1, blow molding involves more steps than other forms of blow molding. First, a parisan made of plastic is formed when a thermoplastic preform is heated to molten form and injected around a hollow mandrel called a blow stem. The process of injection blow molding (IBM) is used for the production of hollow glass and plastic objects in large quantities. In the IBM process, the polymer is injection molded onto a core pin; then the core pin is
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In one embodiment of the present single screw extruder, the tiles are made of carbide or tungsten-carbide. In another preferred embodiment of the present twin screw extruder, the step of securing further comprises brazing, soldering, or gluing.
A kneading disc for a single screw extruder, the disc having a central longitudinal axis and comprising a kneading body of given width twin screw extruder, given material and having a region of maximum operating stress
A method of extending the life of a single screw extruder by affixing tiles of wear-resistant material along the crest of the twin screw extruder flighting threads, and optionally grinding the hardened material to remove any sharp edges.
Kneading disc for a single screw extruder.In order to improve the wear-resistance of highly stressed surfaces of a kneading disc in a helical twin screw extruder, the exposed tips of the kneading disc are provided with inserts of an extremely wear-resistant, hard material.
In a process for extruding a thermoplastic resin in a single screw extruder, a barrel of a twin screw extruder has a channel, a feed section and a first melt seal located after the feed section.
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