How to eliminate or reduce the color difference of injection mold products

The color difference of injection mold products is affected by many factors, among which the most important factors include injection molding machine and mold factors, raw resin masterbatch factors, color masterbatch and master mix uneven factors, cartridge temperature factors, injection process adjustment factors and cartridge temperature color masterbatch factors. The following Xiaobian will tell you how to eliminate or reduce the impact of these factors on the color difference of injection mold products according to many years of experience in injection mold.

1. Eliminate the influence of injection molding machine and mold factors:

Solving the problem of injection molding machine and mold first can greatly reduce the complexity of the color difference problem of injection mold products. Check whether the injection molding machine has material dead corners and other problems, if there is a suggestion to replace the equipment; Secondly, if it is the injection mold casting system, exhaust groove caused by the injection mold product color difference, it can be solved by mold repair.

2, eliminate the influence of raw material resin, master:

The thermal stability of raw materials has a significant impact on the color fluctuation of products, so controlling raw materials is the key to completely solve the color difference of injection mold products. For the master, in the batch production before the sample test color, as the batch master has a slight color difference injection mold products, can be remixed after the use of the master, in order to reduce the color of the master itself caused by uneven mixing injection mold products color difference.

3. Eliminate the influence of uneven mixing of master and master material:

The mixing of plastic master material and color master will cause the change of color master quantity in the injection molding cycle to produce the color difference of injection mold products, which can be solved by the method of artificial stirring after the raw material is sucked into the hopper. For adding toner to produce colored products, hot air dryer can be used to prevent the color difference of injection mold products caused by the separation of toner and master material by artificial feeding method.

4. Reduce the influence of barrel temperature on color difference of injection mold products:

The color difference of injection mold products is often encountered due to the damage and failure of a heating ring or the uncontrolled heating control part. In production, it is necessary to check the heating part frequently, and replace and repair the heating part when it is found to be damaged or out of control, so as to reduce the chance of color difference of this type of injection mold products.

5, reduce the impact of injection molding process adjustment:

When the injection process parameters of non-injection mold products need to be adjusted, the parameters that can affect the color difference of injection mold products should not be changed as far as possible. High injection speed and high back pressure should be avoided as far as possible, and the temperature of each heating section of the cylinder should be strictly controlled.

6. Master the influence of barrel temperature and master quantity on product color change:

Before adjusting the color difference of injection mold products, it is necessary to understand the trend of product color change with temperature and color masterbatch. With the change of production temperature or color master, the product color change law is also different. The pattern of variation can be determined through the color testing process.

The MISSION OF FSTAD IS TO MASTER THE CORE TECHNOLOGY OF injection MOLDING production, communicate and analyze the technology before mold production with customers from the production needs of finished products, so that the mold delivery time is short, the life is long, the rapid mass production and the finished product quality is excellent! I hope today's article about how to eliminate or reduce the color difference of injection mold products can help you. Finally, you can contact us at any time if you have the need for injection mold!