To select the appropriate extruder for core-filling snacks production, consider factors such as production capacity, motor horsepower, die size and shape, management system, and safety features. The extruder's production capacity should match your requirements, and the motor horsepower should be compatible with the intended output. The die size and shape should be appropriate and interchangeable. The management system should allow for parameter modification, and safety features such as emergency stop buttons, interlocks, and guards should be in place. Choosing the right extruder can enhance product quality, decrease labor expenses, and improve operational efficiency.