Weld Line Of Injection Molding Notches, hairlines Change in apparent color; especially when inorganic decorative effect pigments are used the weld line appears as a dark line;conspicuous in dark, brilliant or transparent moldings having smooth surfaces polished to a high gloss. Correction As far as possible, position weld lines where they have no visual or…
DetailsFour Designs For Injection Molds Four design concepts had been considered in designing molds including: 1. Three-plate mould (Concept 1) having two parting line with single cavity. Not applicable due to high cost. 2. Two-plate mould (Concept 2) having one parting line with single cavity without gating system. Not applicable due to low production quantity…
DetailsWhat Is Anodizing? Anodizing is a protective and decorative surface treatment used to enhance the working qualities and visual appeal of items, which are made from a range of metals including aluminum alloys, zinc and titanium. The treatment involves manipulation of the natural oxide layers on the metals to produce thicker and more durable films.…
DetailsGating System Specification Of Exporting Mold Design 1.Gate: a.Automatically cut off and drop down b.Normally applying Submarine gate, Banana gate and hot runner 2.Sprue: a.Using hardened steel, such as SKD62(HRC52) b.Flat or R15.5 for sprue circular arc c.At least Ø3.5mm for the hole diameter d.Length, the shorter, the better e.When custom made, using hardened material…
DetailsInjection Molding Burning Streaks/Silver Streaks Appearance Silvery or dark surface streaks and in exceptional cases black discolorations. Cause 1. Damage to the plastic melt due to excessively high temperatures or overlong residence times resulting from gaseous decomposition products. 2. High shear heating due to small gate cross sections or by sharp changes of direction in…
DetailsInjection Molding Defects-Moisture Streaks/Splay Marks Appearance Usually oblong, silvery surface streaks which are open in the shapre of a U counter to the direction of flow. The material pumped out of the cylinder is foamed and shows blisters on the injection molding parts surface. Cause Moisture content too high; water vapor is produced during melting…
DetailsInjection Molding Gate Types A gate is a designed small opening to allow the melted plastics into the mold cavity, a successful gate design is determined by gate type, dimensions, location, it’s deeply related with the materials been used, the type of mold plates, and economic factors. Gate design is one of the most important…
DetailsBasic Systems Of Plastic Injection Mold Plastic injection mold consists of following basic systems: 1.Gating system 2.Ejection System 3.Cooling System 4.Forming System 5.Venting System Related Products
DetailsDifferent Types Of Rapid Prototyping Rapid prototyping is a family of additive production processes used to assemble prototype models. These processes are known as additive methods, as material is added to the model during construction rather than cut away from a solid block. Members of this family in general use include selective laser sintering (SLS),…
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