Three coloring methods for injection molding
08/29/2018
Today, the range of applications for injection molded parts is becoming more widespread. The injection molded parts on the market are colorful. So how do you process the injection molding? The following is a brief introduction to the three commonly used
coloring methods for injection molding processing. The details are as
follows:
1.
The compound coloring method is the most accurate coloring technology
for injection molding parts. It can produce accurate, repeatable and
appropriate shades of color, which is most suitable for small batch
production. Most commercial plastics are colored on injection molding machines, and most engineering plastics are already colored when sold.
2,
injection molding processing color masterbatch coloring method of
granular materials and liquid materials, can be adjusted into a variety
of colors. Among
them, pellets are most common, and the use of a masterbatch can be
carried out by actually mixing the plastic with the masterbatch to
actually deliver the mixture or masterbatch into the injection molding
machine. The advantages are: cheaper color, reduced dust problem, lower cost of raw materials, and convenient storage.
3, injection molding dry toner coloring method is the cheapest, its shortcomings are vacuum and dirty when used. To
ensure uniform and accurate color throughout the production process,
use a specific size bag or carton to hold the correct amount of dry
toner. When coloring with dry toner, the surface of the plastic pellets must
be covered with a uniform colorant so that the color can be evenly
distributed in the melt. The method and time of compounding must be
standard to ensure uniform coloration.
Once the coloring step is determined, it must be consistent. In
addition, it is also necessary to prevent the toner from absorbing
moisture during storage, otherwise it is easy to smash and cause
markings on the injection molded parts.
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