Injection causes burr: ④ check ring badly worn; spring nozzle spring failure; cylinder or screw wear too much; inlet cooling system failure caused by a "bridge" phenomenon; inadequate set-cylinder injection volume cushion is too small and so may cause flash repeatedly, the importance of timely repair or replacement of parts. ⑤ Clamping machine hinge wear or clamping cylinder seal assembly is worn or reflux occurs drip drop caused by clamping force. Heating system out of control cause actual temperature is too Gao should check thermocouple, heating coil and other factors whether there are problems in injection molding: Second, pressure-controlled injection molding process pressure comprises two plastics pressure and injection pressure, and directly affect the plastic molding and product quality. 1, plasticizing pressure (back pressure) using a screw injection machine, the top screw melt in the screw rotates backward suffered pressure is called plasticizing pressure, also known as back pressure. The size of such pressure can be achieved through the hydraulic system relief valve to adjust. That will increase the temperature of the melt, the workpiece in the injection, the size of plasticization pressure with the screw speed is constant, the increase plasticizing pressure, but reduce plasticizing speed. In addition, increased pressure often make plastics melt temperature uniformity, uniform mixing pigment and exhaust gases melt. General operation, Shandong machining parts, plastics pressure should be decided under the premise to ensure good quality products as low as possible, the specific values ??are used in plastics with different varieties, but usually less than 20 kg / cm . Hebei machining parts, machining parts, Texas Hongyue credibility by Wang Yue Dezhou Composites Limited. Wang Yue Dezhou Composites Co., Ltd. (www.dzshyfhcl.com) (www.dzshyfhcl.com) (www.dzshyfhcl.net) strong, credible, in Dezhou chemical products processing industry has accumulated a large number of loyal customers . The company better work attitude and constantly improving innovative ideas will lead Texas Hongyue into the brilliant and you work for a better future!