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Posts Tagged ‘moulding’

Question by mcfever: why is injection moulding a suitable process to make DVD cases?

Best answer:

Answer by borat
Injection moulding is a manufacturing technique for making parts from thermoplastic material in production. It is the most efficient techique. No cheaper technique exists for this job.

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Question by DIVINE S: industrial safety shoes by injection moulding process maufacturers in india?
we need names,addresses and email address of all industrial safety shoes manufacturers by injection moulding process

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Answer by Steven D
why?

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Question by Gonzalo: What is the function of the ejector pins in the injection moulding process?
It is for Design and Technology! help! im almost failing!

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Answer by Tim C
The pins push the finished part out of the opened mold.

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Question by Gonzalo: What is the function of the ejector pins in the injection moulding process?
It is for Design and Technology! help! im almost failing!

Best answer:

Answer by Tim C
The pins push the finished part out of the opened mold.

Give your answer to this question below!

Question by Opj: What are the environmental effects of the Injection Moulding Process?
Its the process used to make plastic products.They can be negative or positive effects

Best answer:

Answer by Richard
There are very few if any Environmental effect due directly to the injection molding process. Injection molding is a manufacturing process for producing parts from both thermoplastic and thermosetting plastic materials. Material is fed into a heated barrel, mixed, and forced into a mold cavity where it cools and hardens to the configuration of the mold cavity. After a product is designed, usually by an industrial designer or an engineer, molds are made by a moldmaker (or toolmaker) from metal, usually either steel or aluminum, and precision-machined to form the features of the desired part. Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars.

http://en.wikipedia.org/wiki/Injection_molding

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Question by Janet M: What are some example products of the injection moulding process?
Need some examples of products made by injection moulding.

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Answer by Jason
STEROIDS!!!!

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Question by Zed: How to limit or reduce residual stress in injection moulding process?
Just try to limit the birefringence of polycarbonate that occured during the moulding process.

The main cause is the residual stress in the course of moulding, So how do I reduce this? Any idea?

Best answer:

Answer by a.gash
Thixomolded parts are said to exhibit mechanical properties equivalent to or better than die casting , with half the porosity , and tighter part tolerances leading to reduced shrinkage , reduced residual stress and less component distortion. No foundry is required , there is no molten metal handling with its associated losses from flux , sludge or dross , and the process eliminates the use of sulphur hexafluoride , a suspected greenhouse gas which is used in magnesium foundries .
http://www.polymer-age.co.uk/archive2.htm

These residual stresses are mainly frozen in thermal stresses due to inhomogeneous cooling , when surface layers stiffen sooner than the core region as in free quenching. Additional factors in injection molding are the effects of melt pressure history and mechanical restraints of the mold .
http://www.mmpc.mcgill.ca/page4.html

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Meccanoplastica Series Jet Blow Moulding Machine. More Info: www.meccanoplastica.com.

Soffiaggio bottiglie di plastica e lavorazione materie plastiche Plastic Blow Moulding
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