What is Rotational Molding?
The rotational molding process is to add plastic raw materials into the mold first, and then the mold is continuously rotated along two vertical axes and heated so that the plastic raw materials in the mold are gradually and evenly coated, melted, and adhered to the mold under the action of gravity and heat energy. The entire surface of the mold cavity is molded into the desired shape, then cooled and shaped, demolded, and finally the product is obtained.
The Function of Rotational Molding:
There are many kinds of processing and molding processes for plastics and their composite materials. In addition to common processes such as extrusion, injection, and blow molding, rotational molding is also a processing method for plastic products. The development speed of the rotational molding industry is lower than that of other plastic molding processing industries. Traditionally, rotational molding is mainly applied to thermoplastic materials, and rotational molding of thermosetting materials such as cross-linkable polyethylene has also developed rapidly. Because roto molding does not require high injection pressures, high shear rates, or precise polymer metering, molds and machines are less expensive and last longer. From small children's toys to common automotive plastic parts to huge engineering plastic products, especially super-large, and non-standard special-shaped hollow plastic products, due to the limitations of other plastic processing technologies, they can only rely on the rotational molding. Finish. The rotational molding process has become an important branch of the plastic molding process.
The Production Process of Rotational Molding:
The basic process of roto-molding is very simple, that is, powder or liquid polymer is placed in the mold, heated while rotating around two vertical axes (rotation and revolution), and then cooled. At the beginning of the heating stage, if a powder material is used, a porous layer is first formed on the surface of the mold, and then gradually melts with the circulation process, and finally, a homogeneous layer of uniform thickness is formed; if a liquid material is used, the flow and Coated on the surface of the mold, when the gel point is reached, it stops flowing completely. The mold is then transferred to the cooling station, where it is cooled by forced air or sprayed with water, and then placed in the work area, where the mold is opened and the finished part is removed before the next cycle begins.
Design Advantages of Rotational Molding:
Compared with other mold processes, rotational molding provides more design space. Under the correct design concept, several parts can be combined into a complete mold, which can reduce the high assembly cost. The rotational molding production process also includes a series of inherent design thinking methods, such as how to adjust the thickness of the side wall and how to strengthen the external setting. If some auxiliary design needs to be added, the link of the reinforcing rib line can be added to the design.
The rotational molding process injects the endless imagination of designers into the product. Designers can choose the best materials in the production process, including various materials approved by the Food and Drug Administration. The additives put in during the production process can effectively resist external objective factors such as climate attack and static electricity interference. In the design process, the insertion port, thread, handle, inversion device, and perfect surface design are all of the highlights.
The Function of Rotational Molding:
There are many kinds of processing and molding processes for plastics and their composite materials. In addition to common processes such as extrusion, injection, and blow molding, rotational molding is also a processing method for plastic products. The development speed of the rotational molding industry is lower than that of other plastic molding processing industries. Traditionally, rotational molding is mainly applied to thermoplastic materials, and rotational molding of thermosetting materials such as cross-linkable polyethylene has also developed rapidly. Because roto molding does not require high injection pressures, high shear rates, or precise polymer metering, molds and machines are less expensive and last longer. From small children's toys to common automotive plastic parts to huge engineering plastic products, especially super-large, and non-standard special-shaped hollow plastic products, due to the limitations of other plastic processing technologies, they can only rely on the rotational molding. Finish. The rotational molding process has become an important branch of the plastic molding process.
The Production Process of Rotational Molding:
The basic process of roto-molding is very simple, that is, powder or liquid polymer is placed in the mold, heated while rotating around two vertical axes (rotation and revolution), and then cooled. At the beginning of the heating stage, if a powder material is used, a porous layer is first formed on the surface of the mold, and then gradually melts with the circulation process, and finally, a homogeneous layer of uniform thickness is formed; if a liquid material is used, the flow and Coated on the surface of the mold, when the gel point is reached, it stops flowing completely. The mold is then transferred to the cooling station, where it is cooled by forced air or sprayed with water, and then placed in the work area, where the mold is opened and the finished part is removed before the next cycle begins.
Design Advantages of Rotational Molding:
Compared with other mold processes, rotational molding provides more design space. Under the correct design concept, several parts can be combined into a complete mold, which can reduce the high assembly cost. The rotational molding production process also includes a series of inherent design thinking methods, such as how to adjust the thickness of the side wall and how to strengthen the external setting. If some auxiliary design needs to be added, the link of the reinforcing rib line can be added to the design.
The rotational molding process injects the endless imagination of designers into the product. Designers can choose the best materials in the production process, including various materials approved by the Food and Drug Administration. The additives put in during the production process can effectively resist external objective factors such as climate attack and static electricity interference. In the design process, the insertion port, thread, handle, inversion device, and perfect surface design are all of the highlights.
Reference: market-prospects
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