The results indicate that viscoelastic-GK calculation with relaxation of shear modulus and of bulk modulus using the multilayer shell element is the most appropriate method for predicting the warpage.
The factors that affect thin-wall mould warpage, such as mould temperature, melt temperature, rate of injection and holding pressure, etc, are analyzed, in addition the ca…
The speckle projection correlation technique is used to measure the chip warpage.
Series of glass fiber reinforced PET with low warpage have been prepared according to the mechanism and different methods of reduction of warpage.
Basically smooth and shiny on the surface, have no obvious fault of contraction dent, brindle, warpage, defective bubble and plastify.
The theory of the Newton ring method is analyzed and the chip warpage is measured by use of the Newton ring method.
If this causes a warpage problem, it sometimes helps to raise the overall water temperature and slow the rate of heat transfer.
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