A fixed pump injection molding machine is a type of plastic injection molding machine that utilizes a fixed displacement pump to regulate the flow and pressure of melted plastic during the injection process. Unlike a variable pump injection molding machine, which uses a variable displacement pump to control the flow and pressure of melted plastic, the fixed pump injection molding machine has a fixed flow rate and pressure and uses a hydraulic circuit to regulate the flow and pressure of the melted plastic.
Fixed pump injection molding machines are known for their simplicity and reliability, as they have fewer moving parts and a more straightforward hydraulic circuit compared to variable pump machines. They are typically more energy-efficient than variable pump machines, as the fixed pump does not consume as much energy as the variable pump during the injection process.
Fixed pump injection molding machines are suitable for applications that require lower production volumes, smaller parts, or low-pressure molding. They are also suitable for producing simple, small parts that do not require high precision and accuracy in the injection process.