4. convex LobesThe convex lobes are often used to screw or latch to assemble the details great again.The thickness of the claws should be less than 75% of thickness set of claws, note where the lobes of thickness exceeding 50%, then easily put to the dents on the surface because of stress concentration increases.The outer radius of the transition should by 25% of thickness set of claws or at least also by 0.4 mm to reduce stress. Once we increase the depth of claws should make the transition RADIUS to lessen the movement of chaos of material injection molding process and keep the stress level low. However this lead to a consequence is the opposite surface prone to defects.The external taper angle on the side should be as low as 0.5° and the angle of the taper in the smallest should be 0.25° to ensure the draining mold.For more durable, the lobes convex set how far into the product design should add the tendons to increase rigidity. The claws should set into at least 3 mm to save materials and reduce cycle time. The distance between the two tendons should equal at least twice the thickness of products because if placed too close will hardly cool.
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