Injection Moulding Machine Heater Barrel

 It appears there may be a misunderstanding in your question. I'm not sure if you're asking about "heater barrel Cotant" or if there's a typo or confusion in the terminology you intended to use. Let me provide information on both possibilities:

1. Heater Barrel Content: If you are referring to the content inside the heater barrel of an injection molding machine, then it would typically be the electric or cartridge heaters. These heaters are responsible for heating the barrel to the desired temperature to melt the plastic resin. The content inside the heater barrel is primarily the heating elements and the barrel material itself.

2. Heater Barrel Control: It's crucial to control the temperature of the barrel accurately in an injection molding machine to ensure the plastic resin melts uniformly and at the correct temperature. Temperature control is typically achieved through the use of thermocouples or other temperature sensors, along with a heating element control system that adjusts the power to the heaters as needed to maintain the set temperature. This control is essential for consistent product quality and avoiding issues like overheating or underheating of the plastic material.

If you had a different question or if there was a specific aspect of the injection molding process you wanted to know more about, please provide more details or clarify your question, and I'd be happy to help further.