NEWS
Injection mould requirements for injection moulding
Release time:
Dec 01,2023
Injection moulding is moulded in an injection mould with geometrical limitations of the mould composition, which does not require high strength of the melt. Injection moulding- filling the mould with plastic under pressure, directly injecting the melted plastic into the mould, suitable for wall thickness above 1MM, all kinds of structural products.
1, injection moulding on the liquidity requirements of high, especially thin-walled products and large products. Extrusion on the requirements of some loose, because the extrusion is open, without the huge resistance of the reverse of the mould.
2, extrusion moulding, although there is also the geometric limitation of the mouth mould, but after the exit of the mould is not fully cured, in this free state sometimes due to the low melt strength and can not be well formed, such as spinning. In addition, after extrusion is often accompanied by subsequent processing in the free state of moulding, such as thermoforming, hollow blow moulding, in these moulding processes there are often different degrees of melt stretching, if the melt strength is low, it is easy to pull through. Therefore, injection moulding generally does not require high melt strength, while extrusion is generally required.
3, injection moulding generally does not have strict requirements for export expansion. The export expansion of extrusion is very nasty. Therefore, the viscoelastic control of injection moulding and extrusion materials will be different.
4, blow moulding - the plastic heated with the wind into a film sheet, first injection embryo, and then blow up with the gas, for bottles with thin wall thickness.
5, Blister: the plastic sheet is heated and softened, placed on top of the mould to cool and shape, and then processed, applicable to small quantities, simple structure of the product.
Injection mould and blow mould refers to the different products, injection mould is generally used to do thicker products, such as bottle caps, etc., blowing is used to gas, such as bottles. Injection moulding because the product is thicker, relatively low requirements, blowing inverse different, because the product is thinner, more transparent, a little shortcomings are very obvious. So the requirements are higher, and blow moulding on the toughness of raw materials, tensile and some requirements. Injection moulding is less demanding
Previous Page
Previous
DO YOU HAVE QUESTIONS?
Get In Touch With Us!