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INJECTION UNIT 1
INJECTION UNIT 2
INJECTION UNIT 3
Frequently Asked Questions (FAQ)
What is the main function of an injection unit?
The injection unit is a critical component of an injection molding machine. Its primary function is to melt the plastic raw material (pellets) uniformly and inject the molten plastic under high pressure into the mold cavity.
What are the key components of a standard injection unit?
A standard injection unit consists of a hopper (for material feeding), a heated barrel, a reciprocating screw, band heaters, a nozzle, and the hydraulic or electric drive mechanism that controls screw rotation and translation.
How do I determine the right injection unit size for production?
Choosing the correct size depends on your required shot weight, the specific plastic material being processed, the necessary injection pressure, and the overall molding cycle time required for high-quality output.
What are the typical signs of wear in an injection unit?
Common indicators of wear in the screw or barrel include a drop in injection pressure, inconsistent shot sizes, prolonged recovery times, and the presence of black spots or contamination in the molded parts.
How often should maintenance be performed on the injection unit?
Routine maintenance, including checking heater band functionality, inspecting the nozzle for wear, and cleaning the screw, should be performed regularly (weekly or monthly) depending on production volume and material usage.