The working principle of PP strapping production line mainly includes 6 points:

1. The main and auxiliary machines of the PP strapping production line are driven by a speed regulating motor, a reducer, and a shaft sleeve. The forming part consists of a screw barrel, a machine head, and a mouth mold. The raw materials are heated and extruded from the hopper to the screw barrel to produce the initial embryo. The temperature control of the fuselage section is 120 degrees, the second section is 170 degrees, the third section is 220 degrees, and the nose has a temperature range of 250-280 degrees.

2. The water tank of the PP strapping production line cools and shapes the initial stage of the main and auxiliary machine mouth molds. After the material is discharged from the machine head, the temperature is very high, and it needs to be immediately cooled in water, because isotactic polypropylene is prone to forming a grain structure under rapid cooling, and the grain molecular structure is relatively loose. Easy to stretch orientation and obtain high-quality products. (Kind reminder: The cooling water temperature of the strapping production line is generally controlled at 30-40 degrees, and the distance between the strapping production line mold mouth and the water surface is recommended to be 15-45 millimeters).

3. The PP strapping production line is composed of a speed regulating motor, traction roller, reducer, and chain drive for traction. It transports the finalized embryo to an oven.

4. PP strapping production line offline oven secondary heating for easy stretching; The main purpose of stretching is to improve the longitudinal strength of the strapping and reduce elongation. The strapping production line heats the oven three times to eliminate tensile stress, and the upper water tank eliminates thermal stress before shaping.

5. The transmission of the embossing machine in the PP strapping production line is achieved by a speed regulating motor through belt transmission, chain transmission, and gear transmission to the second traction, embossing, and then traction.