Printer drain product is shown in Figure 1. Maximum dimensions of product are 226.59 mm * 44.58 mm * 67.80 mm; average thickness of plastic part is 1.00 mm, material of plastic part is ABS, shrinkage rate is 1.005, and weight of plastic part is 23.53 grams. Technical requirements for plastic parts are that there should be no defects such as peaking, underfilled injection molding, flow lines, pores, warping deformation, silver streaks, cold material, and jetting lines, and meet ROSH environmental protection requirements.
Tag: molding processing
Dynamic monitor cover product is shown in Figure 1. Maximum outer dimensions of face shell product are 37.78 mm * 13.00 mm * 8.62 mm; average glue thickness of plastic parts is 0.80 mm, plastic part material is PC+ABS, shrinkage rate is 1.004, and weight of face shell plastic parts is 5.55 grams. Technical requirements for plastic parts are that there must be no defects such as peaks, underfilling, flow lines, pores, warping deformation, silver streaks, cold materials, jet lines, etc. and they must comply with ROSH environmental requirements.
Property of friction between macromolecules when molten plastic flows is called plastic viscosity. Coefficient of this viscosity is called viscosity, so viscosity is a reflection of fluidity of molten plastic. The greater viscosity, the stronger viscosity of melt, the worse fluidity and the more difficult processing. In industrial applications, comparing fluidity of a plastic is not based on its viscosity value, but on its melt flow index (called MFI): so-called MFI means that at a certain melting temperature, melt is subjected to a rated pressure, weight of melt passing through standard die per unit time (usually 10 minutes). It is expressed in g/10min, such as injection molding grade PP material, grade is different, MFI value can vary from 2.5 to 30. Viscosity of plastic is not static. Change of characteristics of plastic itself, influence of external temperature, pressure and other conditions can all contribute to change of viscosity.
Product of irradiation lamp holder is shown in Figure 1. Maximum size of product is 98.30 mm * 70.00 mm * 68.40 mm, average thickness of plastic part is 2.00 mm. Material of plastic part is liquid crystal polymer LCP, T130 or T150, UL94-V0, shrinkage rate is 1.0035, density is 1.7, and weight of plastic part is 42.17 grams. Technical requirements for plastic parts are that there must be no defects such as peaks, underfilling of injection molding, flow lines, pores, warpage deformation, silver streaks, cold materials, jet lines, etc.
Gud Mould 