The documents listed below are available for download in PDF format, simply click on the download link to access each of them.
Proper drying reduces moisture related surface defects. Before processing, pellets made from Astalac™ and Astaloy™, ABS resins and alloys must be properly dried to prevent surface defects on finished parts... download pdf
Astalac™ ABS resins and Astaloy™ alloys offer wide processing latitudes, favourable economics and desirable end-product characteristics to the injection moulder of thermoplastics... download pdf
Topics covered: Thermal expansion of engineering thermoplastics, dependence of surface temperature on colour, tooling metals used for injection moulding, self tapping screws for engineering thermoplastics, snap fit assembly for engineering thermoplastics, using metal inserts with engineering thermoplastics, metal replacement with engineering thermoplastics and automotive painting of engineering therplastics. download pdf
Drilling is a common post-moulding machining operation, largely for economic reasons. Construction of moulds with plugs in any position but vertical to the mould surfaces, necessitating plug withdrawal before mould release, is likely to be very expensive... download pdf
The enormous demand for plated plastics in recent years has resulted in an exponential growth in markets in Australia and around the world. The transportation, appliance, communications, hardware and marine industries have been in the vanguard of that demand... download pdf
Topics covered: mould types, venting, sprue bushes, runners, 3 plate moulds, pin gates, direct sprues, fan, edge and jump gates, direct centre sprues, diaphragm gates, sub gates, chisel gates and curved tunnel gates. download pdf
Topics covered: Injection moulding machine, reciprocating screw injection carriage, machine screw designs, screw non-return valves, machine nozzle designs, machine clamp tonnage and calculations, machine injection capacity and limitations, melt decompression after screw recharge, simplified shear rate calculations, typical moulding cycles (cooling time), dimensional tolerances of moulded components and typical processing conditions of marplex materials. download pdf
Topics covered: Cooling, cold runner design, gate design, hot runners, hot drops, valve gates, venting, mold polish and coatings, draft angles and textured surfaces, ribs and radii, undercuts, shot capacity and clamping tonnage, injection profiling, screw and barrel design, nozzles, drying conditions, melt and mold temperatures, injection speed, cushion, back pressure and decompression, purging and shutdown and regrind. download pdf
The term "flame retardant" identifies grades of ABS resins and alloys which meet specific laboratory test requirements. The testing authority, procedures and results are identified in supporting technical literature. Any representations do not necessarily typify the performance of ABS resins and alloes under actual fire conditions... download pdf
Topics covered: machine recomendations, screw design, nozzles, mould design, sprue and runners, gate design, processing conditions and purging. download pdf
Topics covered: Blister or bubbles , Incomplete forming, poor detail , Sheet scorched , Blushing or change in color intensity , Whitening of sheet , Webbing, bridging or wrinkling , Nipples on mold side of formed part , Too much sag , Sag variation between sheet blanks , Chill marks or “Mark-Off” lines on part , Bad surface markings , Shiny streaks on part , Excessive post shrinkage or distortion of partafter removing from mold , Part warpage , Poor wall thickness distribution and excessivethinning in some areas , Non-uniform pre-stretch bubble , Shrink marks on part, especially in corner areas(inside radius of molds) , Too thin corners in deep draws , Part sticking to mold , Sheet sticking to plug assist , Tearing of part when forming , Cracking in corners during service. download pdf