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Injection Mold. Injection Mold : Locating Ring. Injection Mold : Sprue Bushing. Injection Mold : Guide Pins and Bush. Injection Mold : Angle Pins. Injection Mold : Angle Pins. Injection Mold : Angle Pins Design. Injection Mold : Angle Pins Design.
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Injection Mold : Runner Designing • Ex. The runner lay-out for eight cavity mold is illustrated in fig. If the mold is to be designed so that the pressure at the gate is the same in all cases, Determine the radius of the runner in section A. The flow may be assume to be isothermal.
Injection Mold : Runner Designing Solution: Although this runner system is symmertrial, it is not balanced. If the runner has the same diameter throught all sections, then the moldings close to the sprue would fill first and would be over-pack before the outermost cavities were filled simulteneously at the same pressure.In this case it is necessary to ensure the pressure drop in section 1 and 3 is the same at the pressure drop in section 2. Pressure drop circular channel.