A comparison of rotation and injection production methods for polyethylene brackets of floating net cages

WOS: 000431396400005One of the important components of net cages that have been used for aquaculture activities in marine and freshwater environment, are brackets. Rotation system have been used to produce brackets for a long time; but as plastic process technology has just well developed, using of injection method has become more popular. This study presents a comparasion between both production methods on ingredient utilization, production capacity per hour, energy consumption and production costs in commercial production conditions. According to the results, obtained injection metdod can reduce the number of employee up to fifty percent, instead of using powder LDPE material as an ingredient in the rotation method, injection method can use granule form of LDPE, the number of brackets were produced in a hour can be increased up to 50%. In terms of energy consumption, the injection method can provide up to 80% profit and finally producing brackets with injection method reduce the production costs 9.2