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Rotomolding Machine Rotary Forming Process
- Jul 05, 2017 -

Rotomolding Machine Rotary forming process

Rotary molds are suitable for molding large and extra large parts. Since the rotary molding process only requires that the strength of the frame is sufficient to support the weight of the material, mold and frame itself and to prevent the material from leaking, it is not necessary to use very heavy equipment and molds even if large and large plastic parts are machined The Thus, theoretically, the articles made by the rotary molding process have almost no upper limit from the size.

Rotational molding die due to rotomoulding mold from external force, so the mold is simple, low prices, easy to manufacture. In addition, the rotomolding equipment also has a large mobility, a rotational molding machine, both can install a large mold, can also arrange more than a small mold; it can not only mold the size of different parts, but also at the same time Forming the size and shape are very different products, as long as the rotten plastic products used in the same raw materials, the thickness of the product can be simultaneously rotomoulding, so rotomoulding process than other molding methods have greater mobility.

The rotary press operates the burner to start automatically under the temperature control condition, starts to mold the mold inside the oven, the timer starts timing, adjusts the heating time and the heating temperature on the screen. The burner is started with the fan at the same time.

After the drum machine door is fully closed, the following starts at the same time: the heater starts to start at the temperature control, starts heating the mold in the oven, starts the timer, adjusts the heating time on the screen, the heating temperature and the inner arm Forward and reverse time, temperature.

With the continuous development of rotational molding process, the type of rotomoulding products continue to increase, the scope of application is also expanding, the current domestic and foreign rotomolding products involved in the industry, including transport, traffic safety facilities, entertainment, river channel dredging, construction , Water treatment, pharmaceutical food, electronics, chemicals, aquaculture, textile printing and dyeing. Domestic rotary molding unit mainly produces garbage bin, oil tank, plastic box shell.

Molding machine comb-type arms equipment for the linear combination, the middle of the combustion chamber, both sides of the cooling room and loading and unloading one, when the side of the arm into the oven heating furnace, the other side is stopped outside the cooling or loading and unloading, Flexible operation, high utilization of combustion chamber, the arm can carry a heavier mold, suitable for the manufacture of larger products, equipment maintenance convenience. The size of the combustion chamber can be designed and manufactured according to customer requirements. The powder or paste into the mold material, through the mold heating and vertical and horizontal rolling rotation, so that the material by its own gravity and centrifugal force evenly covered with the mold cavity and melt, to be demoulded after cooling to get hollow Products. As the rotomolding speed is not high, the device is relatively simple, almost no internal stress products, prone to deformation, depression and other shortcomings. Initially used mainly for PVC paste plastic production of toys, leather, bottles and other small products, recently in large products also have more applications, the resin has been used polyamide, polyethylene, modified polystyrene polycarbonate.

Rotomoulding die of the plastic film-ZZ-MJ-01

Similar to the rotary casting of a molding method, the difference is that the material used is not liquid, but sintered dry powder. The process is to put the powder into the mold and rotate it around two mutually perpendicular axes. Heat and evenly on the inner wall of the mold sintered into one, and then by cooling can be obtained from the mold hollow products.