What is the job of a temporary worker who blows square pipes in a plastic factory?

Special job. Temporary workers who blow square pipes in plastic factory belong to special types of work, including heavy physical labor and toxic and harmful types of work such as welders, electricians, boiler workers and square pipe workers, as well as square pipe workers. The main work is to use the blow molding machine to heat plastic particles, pigments and other raw materials, and then insert them into the blow molding machine for blow molding, thus producing various plastic products, such as barrels, bottles, containers, toys and so on.