company news about Production Process and Operating Procedures of Rotomoulded Products

Rotational molding requires LLDPE to be ground into uniform particles (35 mesh). Processing involves filling a mold with powdered LLDPE, heating and biaxially rotating the mold to distribute the LLDPE evenly. After cooling, the product is removed from the mold; TOPGREEN rotomolding storage tank, cylindrical storage tank, such a shape conforms to a high strength-to-weight ratio, the annular reinforcing rib improves rigidity and has excellent acid and alkali resistance, and adopts imported linear low-density ( LLDPE) anti-corrosion raw materials; the production process and operating procedures of TOPGREEN plastic (rotomolding) products must be completed in strict accordance with the following steps to complete the entire production process.

1. Pulverize the LLDPE raw materials (this process is continuous) with a particle size of 30-70 meshes.

2. Before the product is put into production, it is necessary to identify the mold according to the product name, specification model, quantity, quality, and color requirements on the production task list, clean the mold surface, apply a release agent, tighten the mold screws, and install the mold. On the positioning frame of the rotomolding machine, then push it into the rotomolding box, close the box door, turn on the home switch and the ignition switch, and dry the mold. The temperature in the box is controlled at 220 degrees for 10 minutes. Open the box, pull out the mold positioning frame, and loosen the mold inlet screw or chuck.

3. According to the single color and luster requirements of the production task, the LLDPE is crushed and poured into the mixer together with the pigment for stirring (the powder and the pigment are to be mixed in an irregular proportion according to the color and luster) and the stirring time shall not be less than 15 minutes.

4. According to the weight requirements of the product, weigh the mixed powder, then pour it into the mold, seal it with screws or chucks, and refuel the operating system, such as gears, chains, bearings, and refueling holes. The mold positioning frame is pushed into the rotomolding case, the case door is closed, the main switch and the ignition switch of the fuel engine are turned on, so that the temperature in the machine room continues to rise, and the reverse switch (controlled by a special person) is exchanged with each other, and each direction is rotated for 10 minutes. , When changing the can, you must first stop the square engine, then stop the auxiliary engine, and then turn on the reversing switch after the stop is stable (open the auxiliary engine first, then the main engine).

5. When the temperature in the box reaches 185-230 degrees, the temperature required for plasticization should be strictly controlled according to the different plastic grades and origins, and the different plasticizing temperatures of various product models. Turn off a small amount of oil and start heat preservation for 40 minutes. During the heat preservation process, repeat the above reverse motion until the heat preservation time ends.

6. Open the door of the rotomolding box, pull out the mold positioning frame, add oil to each running part, open the exhaust fan, and cool while running, and finally use water for forced cooling.

7. When the mold has cooled for 25 minutes, turn off the main and auxiliary machines, loosen the positioning screws, remove the mold with a crane, and then loosen the mold chuck and screws. In order to keep the surface of the product clean, wash your hands and bring clean gloves to remove the product from the mold.

8. To produce the next product, operate according to the above procedures (Note: If you need to replace other products, the mold must be cleaned with detergent, put on a release agent, and dried, otherwise it will affect the color of the next product).

9. For the formed products, cutting, planing, trimming, and labeling cards should be carried out. After inspection by the inspector, the qualified ones should be put into the warehouse, and the unqualified ones should be disposed of in time or scrapped, and the reasons for the treatment results should be stated. And the handling opinions are reported to the production department for the record