Rotational molding mold design considerations

Molds for Rotational Molding 15.4.1 Mold Design Considerations... 

Additional design information about the process can be found in a publication by the Association of Rotational Molders (ARM) titled, Introductory Guide to Designing Rotationally Molded Plastic Parts. A number of often-overlooked considerations in designing a rotomolding process are listed in Table 9.4. 

This technique, also referred to as rotomolding or rotational casting, is used for the fabrication of a wide variety of products including tanks (up to 20,000 gallons or more), portable toilets, battery cases, scrubber housings and garbage containers. Equipment and mold costs are low, and there is considerable design freedom. ... 

Boundary conditions for structure analysis of molding feature are detennined in due consideration of designed micro mold system and the condition of injection molding machine, (figure 3) The part of spiral feature which is pressured by resin is affected by the pressure of 120MPa. Fixed part is Z-axis because the bottom face of core is propped by the support core fixed in the support plate. Besides, three axes contacted with mold plate are fixed and so the rotational direction of core is fixed. Apphed material properties are summarized in Table 1. 

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