Method and apparatus for pressing and curing resin-impregnated wrappings about coils
First Claim
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1. A method for heat setting a thermosetting resin impregnated in wrappings around a coil having opposed straight leg portions, which comprises:
- adjusting as necessary the relative positions of two separate mold base members adapted to separately support said leg portions;
disposing said leg portions of said coil in said mold members;
placing a pair of mold cover members against said leg portions;
moving fluid actuated clamping means from a position in which the mold members are open for insertion of said core to a clamping position;
clamping said pair of mold cover members against said leg portions by said clamping means; and
applying heat and pressure to said coil, thereby bonding said wrappings of said coil around said straight leg portions.
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Abstract
The wrapped insulation of coils of large electric machines--motors or generators--is set by heat and pressure in a press that extends the length of both wrapped legs of the coil and supports the coil so that it is substantially free from stress. The coil may be supported with its wrapped legs level and horizontal, and the press can be adjustable for different coil sizes and configurations. The heat and pressure cycle is operable automatically to suit the requirements of the insulating material.
14 Citations
13 Claims
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1. A method for heat setting a thermosetting resin impregnated in wrappings around a coil having opposed straight leg portions, which comprises:
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adjusting as necessary the relative positions of two separate mold base members adapted to separately support said leg portions; disposing said leg portions of said coil in said mold members; placing a pair of mold cover members against said leg portions; moving fluid actuated clamping means from a position in which the mold members are open for insertion of said core to a clamping position; clamping said pair of mold cover members against said leg portions by said clamping means; and applying heat and pressure to said coil, thereby bonding said wrappings of said coil around said straight leg portions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for heat setting resin impregnated in wrappings around a coil having two opposed straight leg portions comprising:
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first and second separate mold base members, each adapted to support one of said straight leg portions, said mold members being relatively movable to accommodate different sized and configured coils; first and second mold cover members adapted to cooperate with said mold base members; first and second fluid actuated clamping means, each movable from a first position, in which said mold base members are open to receive one of said straight leg portions, to a second position in which said upper cover members engage said mold members wherein said clamping means engage said mold cover members; means for applying pressure between said mold cover members and said mold base members; and means for heating said mold members. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification