Injection moulding is the most widely used polymeric fabrication process. With reference to the Figure Q4 (c), elaborate on the THREE (3) main stages in the injection moulding process. i. ii. iii. Injection of the plastic melts into the mould Holding pressure and plasticating Ejection

Injection moulding is the most widely used polymeric fabrication process. With reference to the Figure Q4 (c), elaborate on the THREE (3) main stages in the injection moulding process. i. ii. iii. Injection of the plastic melts into the mould Holding pressure and plasticating Ejection

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

answer fast with summarized solution

Injection moulding is the most widely used polymeric fabrication process. With
reference to the Figure Q4 (c), elaborate on the THREE (3) main stages in the
injection moulding process.
i.
ii.
iii.
Injection of the plastic melts into the mould
Holding pressure and plasticating
Ejection
Feed hopper
Heaters
Reciprocating screw platen
Nozzle
IIL
Barrel
Nonreturn
valve
Injection unit
Stationary
Figure Q4(c)
27
Movable
platen
Mould
Clamping unit

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