METHOD FOR PRODUCING THROTTLE VALVE
PROBLEM TO BE SOLVED: To provide a method for producing a throttle valve, which can avoid damage to a valve body, when a gate mark projection is removed, is high in resin density and dimensional accuracy. SOLUTION: When a cylindrical shaft coating 13 and the valve body 11 with semicircular plates 14...
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| creator | TAKEUCHI KENJI OZEKI MASAJI MIYAMOTO KENJI TANIMURA HIROSHI SHIMOTO HIROKI FUKAYA YUKIMASA SHIMADA HIROKI KUBOTA YOSHINORI ASANO HIDEKI |
| description | PROBLEM TO BE SOLVED: To provide a method for producing a throttle valve, which can avoid damage to a valve body, when a gate mark projection is removed, is high in resin density and dimensional accuracy. SOLUTION: When a cylindrical shaft coating 13 and the valve body 11 with semicircular plates 14 and 14 are injection-molded, a throttle shaft 12 is insert-molded. In a mold 40, a pedestal 15c is set at both tops of a shaft coating 13c, and an injection gate 45 is made to communicate with the pedestal 15c from the right and left. The injection gate 45 and the pedestal 15c are in the shape of a temple bell having the corner part to be a stress concentration part, and both injection gates 45 and the pedestal 15c are position-deviated vertically to an opposite side mutually with the center line L1 in the horizontal direction, held therebetween. After a molten resin is cured, the gate mark projection 20 is broken for removal. Then, a pedestal 15 is preferably cut by an end mill. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: When a cylindrical shaft coating 13 and the valve body 11 with semicircular plates 14 and 14 are injection-molded, a throttle shaft 12 is insert-molded. In a mold 40, a pedestal 15c is set at both tops of a shaft coating 13c, and an injection gate 45 is made to communicate with the pedestal 15c from the right and left. The injection gate 45 and the pedestal 15c are in the shape of a temple bell having the corner part to be a stress concentration part, and both injection gates 45 and the pedestal 15c are position-deviated vertically to an opposite side mutually with the center line L1 in the horizontal direction, held therebetween. After a molten resin is cured, the gate mark projection 20 is broken for removal. Then, a pedestal 15 is preferably cut by an end mill. 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SOLUTION: When a cylindrical shaft coating 13 and the valve body 11 with semicircular plates 14 and 14 are injection-molded, a throttle shaft 12 is insert-molded. In a mold 40, a pedestal 15c is set at both tops of a shaft coating 13c, and an injection gate 45 is made to communicate with the pedestal 15c from the right and left. The injection gate 45 and the pedestal 15c are in the shape of a temple bell having the corner part to be a stress concentration part, and both injection gates 45 and the pedestal 15c are position-deviated vertically to an opposite side mutually with the center line L1 in the horizontal direction, held therebetween. After a molten resin is cured, the gate mark projection 20 is broken for removal. Then, a pedestal 15 is preferably cut by an end mill. 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SOLUTION: When a cylindrical shaft coating 13 and the valve body 11 with semicircular plates 14 and 14 are injection-molded, a throttle shaft 12 is insert-molded. In a mold 40, a pedestal 15c is set at both tops of a shaft coating 13c, and an injection gate 45 is made to communicate with the pedestal 15c from the right and left. The injection gate 45 and the pedestal 15c are in the shape of a temple bell having the corner part to be a stress concentration part, and both injection gates 45 and the pedestal 15c are position-deviated vertically to an opposite side mutually with the center line L1 in the horizontal direction, held therebetween. After a molten resin is cured, the gate mark projection 20 is broken for removal. Then, a pedestal 15 is preferably cut by an end mill. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACTUATING-FLOATS AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COCKS COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | METHOD FOR PRODUCING THROTTLE VALVE |
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