F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
18/60, 285/4.5
F16L 13/00 (2006.01) B29C 45/14 (2006.01) H01R 43/24 (2006.01)
Patent
CA 1113980
Abstract of the Invention This invention relates generally to vacuum cleaner hose assemblies and more specifically to new and improved methods for providing improved vacuum hose molded on end fittings and assemblies employing injection molding. A two stage molding operation is employed by placing an electrical cord ter- minating in either a female or male plug into a two part mold. Wire is pro- vided having its conductive wires opposite the plug or receptacle end located inside the injection mold. The cord is sealed to the mold applying clamp pressure after which melted thermoplastic or thermoset material is injected into the insert mold cavity, thus providing the product of the first injection molding to be employed as an insert for the second molding process. The in- sert thus provided is electrically connected by splicing and crimping to a current carrying hose. A metal mold core is placed into the inside diameter of the hose, positioning and locating the hose insert on the mold core seat. The assembly thus provided is placed in the upper and lower mold cavities and clamped under pressure. The thermoplastic or thermoset is then injected into the mold cavity which after cooling provides the molded end fitting perman- ently bonded to the hose having the plastic insert fused with the melted thermoplastic or thermoset of the end fitting.
342619
Automation Industries Inc.
Smart & Biggar
LandOfFree
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