Screen Printing For Plastic Injection Products Screen printing or silk screening is a printing technique particularly suited for flat or relatively flat surfaces. The heart of the process involves a fine mesh or screen that is tightly stretched around a rigid frame. The areas that are not to be printed are masked out on the…
What Is Molding Pressure? Molding pressure typically refers to a measurement of force within an injection molding machine. In injection molding, plastic resins are melted and pushed into a steel or aluminum mold, forming plastic parts. The amount of molding pressure should be enough to fill the mold completely, preventing what are known as short…
Five Axis CNC Machining Five axis computer numerical control (CNC) systems are able to move internal tools in three primary axes, designated X, Y, and Z, and two more axes created by the rotation of the X and Y axes. These axes lie parallel to the tool spindle, a core component of CNC production machines.…
What Is A Prototype Mold? A prototype mold is a term that most designers and manufacturers are familiar with, due to the fact that it is connected to the process of bringing a concept to life. Usually, when industrial designers or product designers have a concept for a product, they will go through various stages…
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…
Four 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…
What 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.…
Gating 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…
Injection 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…
Injection 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…