Shear Controlled Orientation in Injection Moulding SCORIM

Shear controlled orientation in injection moulding (SCORIM) is based on the progressive application of macroscopic shears at the melt-solid interface during solidification in the moulding of a polymer matrix. 

Macroscopic shears of specified magnitude and direction, applied at the melt-solid interface provide several advantages  

7 Shear Controlled Orientation in Injection Moulding (SCORIM) 

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. 

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UHMWPE and HDPE processed by shear-controlled orientation in injection moulding (SCORIM) exhibit a reduction in the formation of microvoids and microcracks and an enhancement in wear... 

SCORIM Shear-controlled orientation in injection moulding... 

Medina, E.M.G. (1996) Alignment and management of talc platelets in polypropylene matrix by the application of shear controlled orientation injection moulding (SCORIM) technology. PhD thesis, Brunei University, UK... 

In injection-moulded polypropylene products, densely packed row stmctures are typically found near the surface of the object. At least one process has been developed which is able to deliver this morphology throughout the moulded object, namely shear-controlled orientation injection moulding (SCORIM) (Kalay and Bevis 1997). 

Modified processing techniques have also been useful for thermoplastic starch polymers. Recent work by Martin et al. (2001) and Martin and Avemous (2002) has examined the use of coextruded sheet processing to produce polyester/thermoplastic wheat starch/polyester multilayer films. It was found that adhesion strength between the layers and stability of the interface were crucial properties in controlling the final performance properties of the films. Work by Sousa et al. (2000) has also examined use of the novel shear controlled orientation injection moulding (SCORIM) process to control morphologies and provide tensile property increases of thermoplastic starch/synthetic blends. 

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