Injection moulding diagram

One of the major innovations in recent years is the use of pulsed pressure through the gates to introduce and control the orientation of the structure (or fillers) in injection moulded products. A special manifold is attached to the machine nozzle as illustrated in Fig. 4.46. This diagram relates to the double live feed of melt although up to four pistons, capable of applying oscillating pressure may be used. 

Figure 6.16. A schematic diagram of reaction injection moulding (RIM).

Figure 6.25. A schematic diagram of rubber injection moulding. Adopted from Figure 22 (Cherimisinoff, 1986). Copyright (1986), with permission from Elsevier.

A schematic diagram showing the P-V-T path followed by a typical point within an amorphous polymer injection moulding. Lines a, b, c represent isobars of increasing pressure. 

Weir. C. I. (1975). Introduction to Injection Moulding. Society of Plastics Engineers Inc.. Brookfield Center. A good authoritative and non-mathematical account of injection moulding excellent diagrams. (Relevant to Chapter 7.)... 

Fig. 2.27 Diagram of a GIM installation Combined with a high-pressure evaporator, Desy is a practical nitrogen supply system for gas-assisted injection moulding (GIM).

Flguro 9 Sc iematlc diagram of tiie In-line compounding-injection moulding machine. 

Fig. 5.27 shows the variation of MEP with flow ratio (R/H) for spreading flow in discs of different depths. The material is polypropylene and the constant injection rate is 3.4 x 10 m /s. This is a high injection rate but has been chosen because the clamp forces predicted by this diagram are representative of those occurring in real moulding situations (even though it is based... 

Figure 2.2 compares typical profiles for the injection stage on conventional and modern programmed machines. The diagrams show speed versus distance, or stroke length during the injection part of the process, as the mould is being filled. 

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