Injection color control products

Color is a common injection flaw, color many factors, involving raw material resin, masterbatch, masterbatch mixed with raw materials, injection molding process, injection molding machine, in the actual production process, we generally come from the following five aspects for color control. PRM IndustryAbstract...Articles section 1 injection molding machines and molds to eliminate factorsTo select the products with the capacity of the main injection a considerable injection molding machines, injection molding machine if there is dead material and other issues, the best replacement of equipment. For the die casting system, the exhaust ducts caused by chromatic aberration, and the corresponding part of the mold through the maintenance mode to resolve. Must first solve the problem of injection molding machines and die before they can organize production, to reduce complexity of the problem.(2) eliminate the raw material resin, the impact of masterbatchControl of raw materials is the key to solve the color. Therefore, production of light products, especially when the resin can not ignore the thermal stability of raw materials for products of different color fluctuations significantly affected. Given that most injection molding manufacturer does not manufacture or masterbatch plastic masterbatch, which can be the focus of attention on the production management and materials testing. Namely, strengthening the inspection of raw materials storage; the production of the same product as far as possible the same manufacturer, same grade masterbatch, masterbatch production; for masterbatch production before we try to carry out sampling the color, both with the last proof, but also In this the more, if the color is more or less, can be considered qualified, as a slight color masterbatch batches can be mixed and then re-use of masterbatch, masterbatch itself to reduce the chromatic aberration caused by uneven mixing. At the same time, we need to focus on test material resin, masterbatch thermal stability, thermal stability for the poor, we recommend that manufacturers be exchanged.3 to reduce the impact of barrel temperature on the colorProduction often encounter failures due to damage to a heating coil or heating control part of the long burn out of control the barrel temperature caused dramatic changes in order to produce color. Color produced by these causes is very easy to determine, the general failure of the heating ring damage, while a color plastics will be accompanied by inequality, while the heating control part of the long burn out of control is often accompanied with the product gas spots, discoloration or severe coking phenomenon. Therefore, the production of heat to be part of regular checks and found that the heating part of the timely replacement of damaged or out of control maintenance to reduce the risk of such color produced.4. Injection molding process to reduce the impact of adjustmentReason for non-color injection molding process parameters to be adjusted, as far as possible without changing the injection temperature, back pressure, injection molding cycle and the amount of masterbatch added to adjust the same time need to observe the changes in process parameters on the impact of color, color to be found to adjust. As far as possible avoid the use of high injection speed, high back pressure caused by strong shear injection molding process, and prevent local overheating or thermal decomposition of color and other factors. Strict control of barrel temperature of the heating section, particularly close to the nozzle and the nozzle of the heating part.5. Grasp the barrel temperature, the amount of masterbatch color change of the productMaking color adjustments before color must also be aware of products with temperature, the amount of masterbatch trends. Different masterbatch masterbatch with the production or the amount of temperature change, its color changes of the product is different. Through the trial process to determine the color variation. Unless it is aware of this masterbatch color variation, or color can not be adjusted quickly.

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       Peter Huang