A prepreg cutting method is provided that cuts prepreg without applying any processing, such as heating, to that part of prepreg other than the place to be cut. When prepreg formed by impregnating a base material with a resin and left to semi-harden is to be cut into a specified dimension, the surfa
A prepreg cutting method is provided that cuts prepreg without applying any processing, such as heating, to that part of prepreg other than the place to be cut. When prepreg formed by impregnating a base material with a resin and left to semi-harden is to be cut into a specified dimension, the surface of the prepreg is irradiated with a laser beam so that the resin of the irradiated portion is softened while the laser beam irradiating position is shifted on the prepreg, and the softened resin part is cut by a cutting blade. Because the cutting blade cuts the prepreg portion where the resin has softened, resin dust will not scatter.
대표청구항▼
A prepreg cutting method is provided that cuts prepreg without applying any processing, such as heating, to that part of prepreg other than the place to be cut. When prepreg formed by impregnating a base material with a resin and left to semi-harden is to be cut into a specified dimension, the surfa
A prepreg cutting method is provided that cuts prepreg without applying any processing, such as heating, to that part of prepreg other than the place to be cut. When prepreg formed by impregnating a base material with a resin and left to semi-harden is to be cut into a specified dimension, the surface of the prepreg is irradiated with a laser beam so that the resin of the irradiated portion is softened while the laser beam irradiating position is shifted on the prepreg, and the softened resin part is cut by a cutting blade. Because the cutting blade cuts the prepreg portion where the resin has softened, resin dust will not scatter. electrode support being contacted with said first connection member half; said nozzle support being contacted with said second connection member half; said torch head being replaceably connected to said torch body by means of a plurality of bolts for fixing said torch head and connection member to each other. 3. A torch as defined in claim 2, wherein said connection member being attached with said insulation flange by means of said bolts for fixing said torch head and connection member to each other. 4. A torch as defined in claim 3, wherein said first connection member half and said second connection member half each are formed with a plurality of connection member-side bolt insertion through-holes; said flange is formed with a plurality of flange-side bolt insertion through-holes aligned with said connection member-side bolt insertion through-holes, respectively; said flange-side bolt insertion through-holes each include a large diameter portion receiving therein each head of the bolts and a small diameter portion receiving therein each shank of the bolts; said electrode support and said nozzle support each are formed with a plurality of threaded holes aligned with said connection member-side bolt insertion through-holes, respectively; and said torch head is replaceably connected to said torch body by means of said bolts threadedly fitted in said threaded holes through said connection member-side bolt insertion through-holes and flange-side bolt insertion through-holes. 5. A torch ad defined in claim 2, wherein said insulation flange is formed with flange-side through-holes via which said pipes of said torch body extend; said connection member is formed with fit holes which communicate with said flange-side through-holes and in which said pipes are fitted and communication holes which communicate with said fit holes and are open on a side of said torch head; said torch head is formed with in-head passages aligned with said communication holes; and said torch head is connected to said torch body so that said communication holes and in-head passages communicate with each other at a communication portions therebetween. 6. A torch as defined in claim 5, wherein each of said communication portions is sealed with an O-ring which is arranged at an opening of said communication hole on a side of said torch head or an opening of said in-head passage on a side of said connection member. 7. A torch as defined in claim 2, wherein said torch body is provided on an end thereof defined on a side of said torch head with a gap formation spacer member; said gap formation spacer member being abutted against the inner peripheral surface of the pipe member so as to keep a distance between an opening of said convergent nozzle of said torch head and the inner peripheral surface of the pipe material substantially constant during welding. 8. A torch as defined in claim 7, wherein said gap formation spacer member includes an upper head support half and a lower head support half which are combined with each other to circumferentially surround said torch body; said lower head support half including a lower body portion for circumferentially surrounding a lower portion of said torch body and a lower projection portion arranged so as to vertically downwardly project from said lower body portion, resulting in being abutted against the inner peripheral surface of the pipe material; said upper head support half including an upper body portion for circumferentially surrounding an upper portion of said torch body and an upper projection portion arranged so as to project from said upper body portion in an radial direction of the pipe body, resulting in being abutted against the inner peripheral surface of the pipe material; said upper projection portion having, to said lower projection portion, positional relationship which is set to retrain a variation in distance between said torch head and the inner peripheral surface of the pip e material during welding. 9. A torch as defined in claim 8, wherein said lower projection portion includes a projection body threadedly coupled to said lower head support half and a ball member rollably supported in said projection body so as to be abutted against the inner peripheral surface of the pipe material. 10. A torch as defined in claim 2, wherein said insulation flange is formed into a cylindrical configuration and constitutes said gap formation spacer member. 11. A torch as defined in claim 7, wherein said torch body is provided with at least one deflection restraint spacer member; said deflection restraint spacer member being abutted against the inner peripheral surface of the pipe material so as to prevent deflection of said torch body in the pipe material during buildup welding. 12. A torch as defined in claim 11, wherein said deflection restraint spacer member includes an upper body support half and a lower body support half which are combined with each other to circumferentially surround said torch body, as well as an abutment member arranged so as to vertically downwardly project from said lower body half, resulting in being abutted against the inner peripheral surface of the pipe material. 13. A torch as defined in claim 12, wherein said abutment member is formed into a plate-like shape and arranged so as to extend in a longitudinal direction of the pipe material. 14. A torch as defined in claim 11, wherein said deflection restraint spacer member is constituted by a cylindrical member; said cylindrical member including a first body support half and a second body support half which are combined with each other to circumferentially surround said torch body.
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이 특허에 인용된 특허 (3)
Gruzman Boris (Binghamton NY) Nilsen Carl-Otto (Vestal NY), Laser cutting of composite materials.
Lyzenga, Deborah A.; Weber, Jeffrey Thomas; Fenech, III, Louis Peter; Scarola, Leonard; Leichte, Rachel; Golden, Marty; Doll, Paul E., Reclosable flexible packaging and methods for manufacturing same.
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