AIR FLOW CONTROL DEVICE, AND MOLDING METHOD AND HOLDING DIE THEREFOR

• Main Authors: NAKAJIMA MASAO, NUMAO YASUHIRO, HANDA KOICHI
• Format: Patent
• Language: English
• Published: 25.07.2000
• Edition: 7
• Subjects: ACTUATING-FLOATS; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TAPS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To prevent the bubbling phenomenon and enhance the precision of air flow control by molding a throttle body having an air flow passage formed therein and a throttle valve having an integrally molded valve body by use of the same molding die. SOLUTION: A molding die 1 for air flow control device is set in a two-color molding injection molding machine. A PEI resin composition is used as a throttle body resin, and it is injected to a throttle body molding space CB through a body resin injection passage 8 to mold a throttle body. Further, the PEI resin composition is used as a throttle valve resin, and it is injected into a throttle valve molding space CV and a valve shaft molding space CS through a valve resin injection passage 9 provided on an upper inside and valve surface molding die 6, whereby a throttle valve having a valve body integrated with a valve shaft part is molded. According to this, the mechanical strength of the valve body of the throttle valve can be enhanced to enhance the precision of air flow control.