Encapsulated transformer, method of making encapsulated transformer and apparatus for making encapsulated transformer
AssigneeCooper Industries, Inc.
InventorsWilliam A. Clark, Carl C. Strickland, Jr., Mark C. Newman
Life of this patent
Estimating the term…
Abstract
A mold for encapsulating a transformer coil assembly in thermoplastic rubber includes a bottom mold portion having a mold cavity, an upstanding pin disposed within the mold cavity, a mold cover for closing the mold cavity, and a vent space positioned in the bottom surface of the mold cavity for venting gas within the mold cavity to the exterior of the mold during the injection of thermoplastic rubber into the mold cavity.
Claims11
A mold for completely encapsulating a transformer coil assembly in a casing of thermoplastic rubber, comprising:
- a bottom mold portion having a bottom surface and a mold cavity formed therein, said mold cavity sized and configured to receive a transformer coil assembly so that a space exists between an outer periphery of the transformer coil assembly and an inner surface of the mold cavity;
- gates formed in the mold for allowing thermoplastic rubber to be injected into the mold cavity;
- an upstanding pin positioned centrally within the mold cavity and extending upwardly from said bottom surface of the mold cavity for receiving a core insert;
- a movable mold cover for opening and closing the mold cavity;
- and
- vent means positioned in the bottom surface of the bottom mold portion for venting gas from within the mold cavity to an exterior of the mold through said vent means during injection of thermoplastic rubber into the mold cavity, said vent means being positioned adjacent to the upstanding pin and communicating the mold cavity with the exterior of the mold, the portion of said mold cavity immediately adjacent said vent means being substantially the last portion of said mold cavity to be filled when thermoplastic rubber is injected through said gates, and the vent means allowing venting of gas from the mold cavity as substantially the last portion of said mold cavity is filled with thermoplastic rubber.
A mold for completely encapsulating a transformer coil assembly in a casing of thermoplastic rubber, comprising:
- a bottom mold portion having a bottom surface and a mold cavity formed therein, said mold cavity sized and configured to receive a transformer coil assembly so that a space exists between an outer periphery of the transformer coil assembly and an inner surface of the mold cavity;
- gates formed in the mold for allowing thermoplastic rubber to be injected into the mold cavity;
- an upstanding pin positioned centrally within the mold cavity and extending upwardly from said bottom surface of the mold cavity for receiving a core insert;
- a movable mold cover for opening and closing the mold cavity;
- and
- vent means positioned in the bottom surface of the bottom mold portion for venting gas from within the mold cavity to an exterior of the mold through said vent means during injection of thermoplastic rubber into the mold cavity, said vent means being positioned adjacent to the upstanding pin and communicating the mold cavity with the exterior of the mold;
- and
- wherein said gates include two gates positioned at diametrically opposite sides of the mold cavity, said vent means being located at diametrically opposite sides of the upstanding pin and being located at positions spaced about 90.degree. from the gates.
Dependencies are inferred from the claim text.