Mould design for motorcycle front center cover based on Moldflow
A simulation analysis was conducted on the front center cover of a motorcycle using Moldflow software.Based on the structural characteristics of the parts and the requirements of the forming process,two pouring system schemes were designed.Based on simulation parameters such as filling time,flow front temperature,freezing layer factor,and fusion line,the optimal gate position and quantity were selected.Based on this,the injection method of"3-point needle valve hot runner+3-point side gate"was determined,and a sequence valve hot runner injection mold was finally designed.To solve the problem of lateral core pulling in the T1 area cavity,an innovative core pulling mechanism with"vertical oil cylinder+connecting block+T-shaped block"was designed,making the mould structure more compact.The combination of"large inclined top and small inclined top"solved the problems of inconsistent reverse direction,small core pulling space,and difficult demolding.The guiding positioning system adopted a method of"0°precision positioning block+dynamic fixed mould stop"to ensure that the mould can be accurately and reliably reset during the mould opening and closing process.Adopting a combination cooling system similar to a"conformal water path",both the slider and the large inclined top were designed with independent cooling water paths with a diameter of 12 mm,while the rest were designed with a diameter of 18 mm,making the mould temperature more uniform and reducing the molding cycle by about 11%.After the trial mould,the mould runs smoothly,the movement of each mechanism is safe and reliable,and the precision and surface quality of the plastic parts meet the requirements,which can provide reference for the design of similar moulds.
motorcycle front center covergate positionmould designsequential valve hot runnermould flow analysis
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