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Molten polymer is extruded through a circular die to form bubble or parison.

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15y ago

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Is parison's viscosity low or high?

The viscosity is high because the parison needs to hold its shape.


When the parison is placed in the second mold it doesnt yet have the exact shape of a finished bottle is the parisions visocity low or high why?

When the parison is placed in the second mold, its viscosity is low. This allows the parison to be easily shaped and molded into the final bottle shape. As the parison cools and solidifies, its viscosity increases, helping to retain the bottle shape.


How do they manufacture a shampoo bottle?

Shampoo bottles are typically manufactured using a process called blow molding. First, plastic pellets are heated until they melt and are then formed into a parison, a hollow tube of plastic. This parison is placed in a mold, and air is blown into it, causing the plastic to expand and take the shape of the mold. Once cooled, the bottle is trimmed, labeled, and packaged for distribution.


What is the difference between extrusion blow molding and injection blow molding?

In injection blow molding starting parison is injection molded rather than extruded. In extrusion " " extrusion of parison occurs. There is three steps in injection blow molding: injection, parison and ejection. Tooling cost is higher in injection blow molding. one more, hot knife cut off the resins coming from heating zones before these goes to mold.


Can PET be used in extrusion blow molding?

Hey there,Blow molding is a manufacturing process by which hollow plastic parts are formed. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding. The blow molding process begins with melting down the plastic and forming it into a parison or in the case of injection and injection stretch blow moulding (ISB) a preform. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can pass.- noizyoyster.com


What part of speech is the word surf?

Surf is a noun (the surf) and a verb (to surf).


When the parison is placed in the second mold it doesn't yet have the exact shape if a finished bottle. is the parisons viscosity low or high?

High


How multilayer bottles are manufactured?

The answer is not simple. First you'd need to understand how bottles can be manufactured through different processes. Extrusion Blow Molding is a process that allows you to make a bottle usinga) an EXTRUDER to melt and feed material to b) an EXTRUSION HEAD, and then form a c) PARISON (which is a sort of a hot plastic hose that can later be blown with high pressure air) that is brought into a d) MOULD that will cool-down the plastic giving it its final form. In the extrusion head, the hot plastic (fluid) is guided trough some channels that form the Parison, several different systems are used to form a parison, and they vary from manufacturer to manufacturer. Once you have a parison you can superpose it onto another parison (it's like forming an onion) and you can add several parisons to form different layers, you can use different materials as long as you can make them stay united. The multilayer parison is then brought into the mould and blown to adopt the form of it, which can be a bottle or some other forms. In Injection Blow Molding you can also use the multilayer process to form a bottle. The process is quite different here: you need to inject first a preform (which is a sort of tube o proto-bottle) and then you condition its temperature to allow blowing in a next step. For this process you need two molds, one that will be used for injection and the other that will be used to blow the bottle. The preform or proto-bottle is then brought into the blowing mould and blown to the shape of the bottle using high pressure air. To form several layers you need a multi-extruder or canyon capable machine that injects the material layer onto layer. You can have several different materials as long as they are compatible and stick together. I hope this is clear for you - if not, i could expand the answers, and maybe include a picture....


What is blow ratio in blow molding?

Blow ratio in blow molding refers to the ratio of the parison (hollow tube of plastic) diameter to the final container diameter. It is an important parameter that affects the wall thickness distribution and mechanical properties of the molded container. A higher blow ratio results in thinner walls and better material distribution in the final part.


How is a roundworm's digestive tract like a tube-within-a-tube?

well it has a tube, and that tube is within a tube. therefore, the tube is somehow within the tube. that explains it


Is levin tube same as blakemore tube?

No. Levin tube is not the same as the Blakemore tube.


What are the differences of the air tube and food tube?

difference and similarities of air tube and food tube