Flow mark
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Flow marks, also known as flow lines, are molding defects that can occur in the manufacturing process of injection molding. They are best described as "off tone" wavy lines/streaks or patterns in the molded part around the injection ports. They commonly occur when there is a large variation between cooling speeds of sections of the material as it flows through the mold.
Flow marks, also known as flow lines, are molding defects that can occur in the manufacturing process of injection molding. They are best described as "off tone" wavy lines/streaks or patterns in the molded part around the injection ports. They commonly occur when there is a large variation between cooling speeds of sections of the material as it flows through the mold. ==Prevention Methods== Flow mark causes vary for specific parts and production lines due to the variability in molds, machines, and materials. For the most part they are due to varying cooling speeds of the material as it flows through the mold. The different prevention methods for varying cooling speeds are as follows: ==References==
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