Abstract:
A die machine for manufacturing a laminated iron core includes a first working row for punching out iron core pieces from a steel sheet material and a second working row for punching out electrically insulating sheet pieces from an electrically insulating synthetic resin sheet material. Each iron core piece includes a spindle hole and a plurality of slot holes for receiving coil windings. Each electrically insulating sheet includes a spindle hole and a plurality of slot holes which have a substantially similar configuration to, but are smaller than, the slot holes of the iron core pieces. The die machine includes a stacking die mold for selectively receiving the iron core pieces and the electrically insulating sheet pieces such that successive stacks of iron core pieces are sandwiched between electrically insulating sheet pieces.
Abstract:
A method of manufacturing a laminated iron core using a die, includes punching out iron core pieces from a thin steel sheet material by a first working row, each piece having a spindle hole and a plurality of slot holes of a given configuration. Electrically insulating sheet pieces are punched out from an electrically insulating thin sheet material by a second working row, each piece having a spindle hole and a plurality of slot holes with a configuration similar to, but smaller than, the slot holes of the iron core pieces. Thereafter, the iron core pieces and electrically insulating sheet pieces are stacked such that edges of the slot holes of the electrically insulating sheet pieces extend outwardly beyond edges of the slot holes of the iron core pieces.
Abstract:
A laminated iron core includes a plurality of stacked iron core pieces punched out from a thin steel sheet material, each iron core piece including a plurality of slot holes for receiving coil windings. At least one electrically insulating sheet piece is stacked on an outer surface of a lowermost iron core piece. The electrically insulating sheet pieces include a spindle hole and a plurality of slot holes which have a substantially similar configuration to, but are smaller than, the slot holes of the iron core pieces whereby edges of slot holes of electrically insulating sheet pieces extend outwardly beyond edges of slot holes of iron core pieces. Burrs formed at edges of slot holes of iron core pieces are covered with edges of slot holes of electrically insulating sheet pieces so that a coil can be wound safely without directly contacting the burrs.
Abstract:
A laminated iron core includes a plurality of stacked iron core pieces punched out from a thin steel sheet material, each iron core piece including a plurality of slot holes for receiving coil windings. At least one electrically insulating sheet piece is stacked on an outer surface of a lowermost iron core piece. The electrically insulating sheet pieces include a spindle hole and a plurality of slot holes which have a substantially similar configuration to, but are smaller than, the slot holes of the iron core pieces whereby edges of slot holes of the electrically insulating sheet pieces extend outwardly beyond edges of slot holes of iron core pieces. Burrs formed at edges of slot holes of iron core pieces are covered with edges of slot holes of electrically insulating sheet pieces so that a coil can be wound safely without directly contacting the burrs.
Abstract:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
Abstract:
In a method for preparing an adduct of (A) a butadiene lower polymer or butadiene lower copolymer and (B) a .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound, said method is characterized in that said (A) and (B) are caused to react in the presence of one or more compounds selected from (C) p-phenylenediamine derivatives, catechol derivatives, pyrogallol derivatives, N-nitrosamines, quinoline derivatives and naphthol derivatives, thus serious increase of the viscosity of said adduct in the addition reaction can be prevented.
Abstract:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
Abstract:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
Abstract:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha., .beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
Abstract:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.