How to ensure the safety and stability of cyclopentane series polyurethane high-pressure foaming injection machine during the production process?

In the raw material processing link, the cyclopentane series polyurethane high-pressure foaming injection machine uses an independent explosion-proof isolation room to store cyclopentane, equipped with an alkane gas concentration detector and a three-stage exhaust system to monitor the cyclopentane concentration in the air in real time. Once the lower explosion limit is exceeded, the sound and light alarm is triggered and forced exhaust is started. In view of the flammable and explosive characteristics of cyclopentane, the equipment integrates explosion-proof motors, static electricity extraction devices and grounding protection systems to eliminate the risk of ignition sources caused by static electricity accumulation or mechanical friction. The mixing head area is set with a self-cleaning function, and the residual materials are flushed with high-pressure nitrogen to avoid local pressure increases caused by curing blockage.

The stability of the equipment comes from precise metering and dynamic adjustment technology. It uses a high-precision magnetic coupling to drive the metering pump, combined with a mass flow meter to achieve a ratio error of isocyanate and polyol of ≤1%. The temperature control module controls the raw material temperature fluctuation within ±1°C through the PID algorithm to ensure the consistency of the foaming reaction rate. The mixing head adopts an L-shaped high-pressure self-cleaning structure, and uses a spray pressure of 13~16MPa to atomize and impact the raw materials to form a uniform pore structure.
The Siemens PLC control system and the 10-inch touch screen constitute the central nervous system of the equipment, monitoring multiple key parameter points in real time, including oil pressure, material temperature and valve status. . In addition, the modular design allows for the rapid replacement of wearing parts, such as the maintenance time of the metering pump and filter is shortened to within 2 hours, which significantly improves the equipment availability.