Yongte's PPR pipe production machine successfully completed its trial run.
The Yongte PPR pipe production line's trial run, which encompassed the entire process from installation and commissioning to final acceptance, not only validated the equipment's performance but also comprehensively tested our professional capabilities, problem-solving skills, and teamwork efficiency.
The trial run consisted of three phases: no-load operation - loaded trial run - and continuous production verification.
No-load operation phase: focused on verifying the interoperability of the equipment's systems. After starting the extruder, haul-off machine, and cutter, we observed the consistency of the motor speed with the setpoint and tested the stability of the cooling water pump pressure (standard 0.3-0.5 MPa).
Loaded trial phase: After feeding the PPR raw material, surface ripples initially appeared on the pipe. We gradually increased the die head heating power until the temperature met the specified standard and activated the cooling system to assist in cooling. After 30 minutes, the ripples completely disappeared.
Continuous production verification phase: 25×3.5 mm Φ pipe was produced continuously for two hours, with sampling conducted every 15 minutes. During this process, uneven wall thickness occurred (local deviations of 12%). We fine-tuned the mandrel positioning bolts and ultimately stabilized the wall thickness deviation within 8%, meeting standard requirements.
This acceptance strictly adhered to the previously established indicator system, conducting final verification from three perspectives: equipment performance, product quality, and safety regulations. The moment of acceptance was not only a validation of our previous work, but also made us realize that "success" in engineering is never accidental; it is the result of precise control of every parameter, timely resolution of every issue, and risk management at every stage.
