Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Including settable material – Adhesive encapsulated
Patent
1996-12-26
1997-12-16
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Including settable material
Adhesive encapsulated
411171, 411180, 411258, 156 731, F16B 3704, F16B 3902
Patent
active
056977441
ABSTRACT:
A method and apparatus are disclosed for joining a plastic insert or component to a plastic base having a recess therein. The component is provided with integral projections thereon that are separated from one another by spaces. The component is inserted into the recess with the projections force-fitted against the plastic base. The plastic of projections is caused to flow into the spaces, and the plastic of the base is caused to flow into the spaces where the plastics are intermixed. Then, the flowed, intermixed plastics are brought back into a solid condition with spaces now filled with solid, intermixed plastics that interlock the components to the base against rotation relative to one another and to prevent them from being pulled apart. The preferred projections are spaced in rows and have inclined sidewalls extending outwardly to small, cross-sectional, free ends for rapidly melting and flowing into the spaces. The projections lose their shape and identity, and there is preferably no line of demarcation at the location of the former spaces between the component and plastic base.
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Unimation Inc.
Wilson Neill R.
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