Design guides for plastics clive maier econology ltd tangram technology this publication is made up of a series of articles published in plastics and rubber weekly as a piece work the kind assistance of the author and prw is acknowledged in the publication of the work the publication will be updated in a regular basis as new sections of the guide are published by prw the design hints in . Design issues on living hinges living hinges also known as integral hinges in a plastic part can be defined as thin flexible webs that connect two relatively rigid adjacent wall sections they can be injection molded extruded or produced downstream via machining or stamping the most durable of the three types by far is hinges produced by injection molding a living hinge is formed when . What is a living hinge a living hinge is a thin section of plastic that connects two plastic bodies together since it is very thin it enables the two bodies to move rotationally to angles of 180 degrees and greater they are very durable and with good design can last for millions of cycles. Main takeaways designing living hinges can seem complicated at first but once mastered can result in huge cost savings where a traditional hinge could require several molding operations an assembly operation increased parts and friction between parts causing wear a living hinge can be made and included in your design in just one operation and the friction is reduced to nothing. Living hinge basics for injection molding posted on july 24 2017 by tony holtz designing plastic parts can be challenging enough let alone designing a living hinge that can fold and flex repeatedly hinges are often found in plastic part design in order to reduce the number of components within an assembly or cut down manufacturing costs a living hinge is a thin piece of plastic
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