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9732333 Recent plastics molding technologies for automotive parts
Abstracts / JSAE Review 19 (1998) 89-109 9732298 Development of Light Weight Reinforced-Reaction Injection Molding System for Door Trim Kisomi Sasaki, Hideo Nishimura, Hiroyuki Hirakawa (Toyota Motor Corporation) In recent years, full-shaped door trim has rapidly taken the place of flat-shaped trim. The competition for good design appearance and weight reduction has produced many processes for full-shaped door trim. We have developed a new door trim production system, the light weight reinforced-reaction injection molding (R-RIM), from the view point of low density substrate and simple molding process. 9732306 Development of Injection Molding Process by Molding. Surface Coating for Heat Insulation - Appearance Quality Improvement of Injection Molding Parts by Mold Surface Coating Chikara Tanaka, Chiaki Asano, Hiraku Hayashi, Shinya Takimura (Mazda Motor Corporation) Paint cost reduction for automotive exterior parts is a major tasks in the automotive industry. We applied a colored material molding that is molded plastic with filler of reinforced polypropylene and body color pigment. However problems such as low and uneven gloss occur in the molding process, which make appearance quality decrease. In this paper, we report that we have established a new method of mold surface coating, by evaluating material flow using visualization methods and by statistical analysis.
9732315 The Application of Blow Molding Simulation to the Development of Plastic Fuel Tanks Kousuke Terada, Ryuichi Matuo (Nissan Motor Co., Ltd.) A blow molding simulation technique using the finite element method (FEM) was developed in this study for predicting the thickness distribution in a plastic fuel tank and the degree of shrinkage after the molding process. The simulated results were in good agreement with the measured data. This indicated that the simulation technique can be used effectively in determining the most suitable shape of plastic fuel tanks for new model cars. 9732324 Plastic Injection Molding Technologies and Plastics Recycling Hidetoshi Innami (Asahi Chemical Industry Co., Ltd.) There are many automotive parts made of plastics, but many of them are disposed to shredder dust. The depletion of crude oil and environmental destruction is currently of great concern. We must therefore establish a recycling system for plastics parts, and we must design and mold plastics parts with consideration to recycling. This paper discusses the outline of plastics injection molding technologies for recycling.
9732333 Recent Plastics Molding Technologies Parts Minoru Komada (Toyoda Gosei Co., Ltd.)
for Automotive
The application of plastics to automotive parts is still expanding, and therefore more cost and weight reduction and greater function are required. In this report, recent injection molding technologies to fulfil such requirements as thinner parts, integration and multistructure, and the tooling technologies and Computer Aided Engineering to support them are introduced.
9732342 The Over Spray Paint Recycling for Underbody Coating Toshihisa Ohta, Mitsuo Nakajima, Keiichi Yokouchi (Toyota Motor Corporation) Taking advantage of a new technology that converts over spray paint into powder, a type of industrial waste, which can be reused as raw material for underbody coating (UBC), a material that enables recycling of over spray paint and reduces the cost of UBC, has been developed. Although problems occurred in the course of developing this material, such as peeling of the UBC, when it was used after long term storage, a residual functional group of the paint-reclaimed powder was found to cause a functional disturbance to its adhesion promoter, to which a solution was devised to make practical use of this material.
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9732351 Research and Development of an Environmentally-friendly Automobile Painting Process A Process for Powder Body Paint to Improve the 21st Century Environment Masayuki Yamaguchi (Honda Engineering Co., Ltd.) In recent years, the powder body painting process is in increasing use in the automobile industry. In order to positively to advance this process, while investigating past actual results, without a rise of cost or a loss of resources, we must establish an environmentally-friendly process. This report summarizes research and development of industrial technology in this field. 9732360 Development of the High Sensitivity Measurement Condenser Microphone Masahiko Sakai, Susumu Fukusima, Masanao Ohashi, Takahiko Ono (Ono Sokki Co., Ltd.) Sensitivity of a condenser microphone is mainly determined by tension of the diaphragm. The long-term stability of a condenser microphone will depend on variations of diaphragm tension. But it is difficult to fix a diaphragm with low tension firmly. So we tried to weld the diaphragm to the body of a condenser microphone using the laser welding technique. As a result we produced a 1/2 in Bias type measurement condenser (MI-1211) with high sensitivity ( - 20 dB), low noise (11 dB(A)) and excellent long-term stability (0.08 dB/10 years which was an estimated value by accelerated test). 9732379 A Measurement Method of an Oblique-Incidence Absorption Coefficient By Use of Sound Intensity Technique Masaru Okoshi, Norio Shiroko, Ken'iti Kido (Chiba Institute of Technology Graduate School), Hideo Suzuki (ONTEK R&D), Takahiko Ono (Ono Sokki Co., Ltd.) This paper proposes a new method of the oblique incidence sound absorption coefficient using sound intensity measurement, and experimentally compares this method to the conventional method using impulsive source signal. The oblique incidence sound absorption is important with regard to the absorption of the traffic noise by the road surface, but the measurement method of the oblique incidence sound absorption coefficient is not yet standardized. In most of the measurement methods previously proposed, the separation of the incidence and the reflection sound is difficult. The high reliability of our method is shown by the measurement results.
9732388 New Analysis System for Combined Sound Quality Work and General Noise and Vibration Trouble Shooting Svend Gade, Henrik Herlufsen, Poul Ladegaard (Brim & Kj~er A/S) PULSE, the PC-based Multi-analyzer System Type 3560 from Brim & Kja~r allows multiple analyzers to be defined in the same system, enabling measurements to be made in parallel, thus ensures consistency in the data to be analyzed between FFT analyzers and real-time digital filter analyzers providing standardized octave and one third octave analysis. Furthermore, it allows a wide range of applications to be performed on the same software/hardware platform, such as Sound Quality, Order Tracking analysis, etc. 9732397 Subjective Evaluation of Annoyance from Road Traffic
Noise-Consideration of the Influence of Sound Quality on Annoyance Takeshi Ishiyama (Japan Automobile Research Institute, Inc.), Takeo Hashimoto (Seikei University) This paper describes a study of annoyance from road traffic noise conducted in laboratories. To measure the annoyance from road traffic noise, two experiments were carried out subjectively; one using the road traffic noise recorded at the road side with projection of video film of the scenery around the road side, with and without the visual existence of traffic flow, the other using traffic noise recorded simultaneously at the location where direct sound propagation from the main traffic was confirmed and at the location behind a building without direct sound propagation. As a result, the visual influence of the traffic was found not to be significant, but the influence of sound quality was significant on the annoyance from road traffic noise.
9732315 The Application of Blow Molding Simulation to the Development of Plastic Fuel Tanks Kousuke Terada, Ryuichi Matuo (Nissan Motor Co., Ltd.) A blow molding simulation technique using the finite element method (FEM) was developed in this study for predicting the thickness distribution in a plastic fuel tank and the degree of shrinkage after the molding process. The simulated results were in good agreement with the measured data. This indicated that the simulation technique can be used effectively in determining the most suitable shape of plastic fuel tanks for new model cars. 9732324 Plastic Injection Molding Technologies and Plastics Recycling Hidetoshi Innami (Asahi Chemical Industry Co., Ltd.) There are many automotive parts made of plastics, but many of them are disposed to shredder dust. The depletion of crude oil and environmental destruction is currently of great concern. We must therefore establish a recycling system for plastics parts, and we must design and mold plastics parts with consideration to recycling. This paper discusses the outline of plastics injection molding technologies for recycling.
9732333 Recent Plastics Molding Technologies Parts Minoru Komada (Toyoda Gosei Co., Ltd.)
for Automotive
The application of plastics to automotive parts is still expanding, and therefore more cost and weight reduction and greater function are required. In this report, recent injection molding technologies to fulfil such requirements as thinner parts, integration and multistructure, and the tooling technologies and Computer Aided Engineering to support them are introduced.
9732342 The Over Spray Paint Recycling for Underbody Coating Toshihisa Ohta, Mitsuo Nakajima, Keiichi Yokouchi (Toyota Motor Corporation) Taking advantage of a new technology that converts over spray paint into powder, a type of industrial waste, which can be reused as raw material for underbody coating (UBC), a material that enables recycling of over spray paint and reduces the cost of UBC, has been developed. Although problems occurred in the course of developing this material, such as peeling of the UBC, when it was used after long term storage, a residual functional group of the paint-reclaimed powder was found to cause a functional disturbance to its adhesion promoter, to which a solution was devised to make practical use of this material.
99
9732351 Research and Development of an Environmentally-friendly Automobile Painting Process A Process for Powder Body Paint to Improve the 21st Century Environment Masayuki Yamaguchi (Honda Engineering Co., Ltd.) In recent years, the powder body painting process is in increasing use in the automobile industry. In order to positively to advance this process, while investigating past actual results, without a rise of cost or a loss of resources, we must establish an environmentally-friendly process. This report summarizes research and development of industrial technology in this field. 9732360 Development of the High Sensitivity Measurement Condenser Microphone Masahiko Sakai, Susumu Fukusima, Masanao Ohashi, Takahiko Ono (Ono Sokki Co., Ltd.) Sensitivity of a condenser microphone is mainly determined by tension of the diaphragm. The long-term stability of a condenser microphone will depend on variations of diaphragm tension. But it is difficult to fix a diaphragm with low tension firmly. So we tried to weld the diaphragm to the body of a condenser microphone using the laser welding technique. As a result we produced a 1/2 in Bias type measurement condenser (MI-1211) with high sensitivity ( - 20 dB), low noise (11 dB(A)) and excellent long-term stability (0.08 dB/10 years which was an estimated value by accelerated test). 9732379 A Measurement Method of an Oblique-Incidence Absorption Coefficient By Use of Sound Intensity Technique Masaru Okoshi, Norio Shiroko, Ken'iti Kido (Chiba Institute of Technology Graduate School), Hideo Suzuki (ONTEK R&D), Takahiko Ono (Ono Sokki Co., Ltd.) This paper proposes a new method of the oblique incidence sound absorption coefficient using sound intensity measurement, and experimentally compares this method to the conventional method using impulsive source signal. The oblique incidence sound absorption is important with regard to the absorption of the traffic noise by the road surface, but the measurement method of the oblique incidence sound absorption coefficient is not yet standardized. In most of the measurement methods previously proposed, the separation of the incidence and the reflection sound is difficult. The high reliability of our method is shown by the measurement results.
9732388 New Analysis System for Combined Sound Quality Work and General Noise and Vibration Trouble Shooting Svend Gade, Henrik Herlufsen, Poul Ladegaard (Brim & Kj~er A/S) PULSE, the PC-based Multi-analyzer System Type 3560 from Brim & Kja~r allows multiple analyzers to be defined in the same system, enabling measurements to be made in parallel, thus ensures consistency in the data to be analyzed between FFT analyzers and real-time digital filter analyzers providing standardized octave and one third octave analysis. Furthermore, it allows a wide range of applications to be performed on the same software/hardware platform, such as Sound Quality, Order Tracking analysis, etc. 9732397 Subjective Evaluation of Annoyance from Road Traffic
Noise-Consideration of the Influence of Sound Quality on Annoyance Takeshi Ishiyama (Japan Automobile Research Institute, Inc.), Takeo Hashimoto (Seikei University) This paper describes a study of annoyance from road traffic noise conducted in laboratories. To measure the annoyance from road traffic noise, two experiments were carried out subjectively; one using the road traffic noise recorded at the road side with projection of video film of the scenery around the road side, with and without the visual existence of traffic flow, the other using traffic noise recorded simultaneously at the location where direct sound propagation from the main traffic was confirmed and at the location behind a building without direct sound propagation. As a result, the visual influence of the traffic was found not to be significant, but the influence of sound quality was significant on the annoyance from road traffic noise.