Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Plural – intermittent pressure applying
Patent
1996-05-09
2000-12-26
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Plural, intermittent pressure applying
264294, 264318, 264325, 425353, 425354, 425355, 419 66, B29C 4342
Patent
active
061654000
ABSTRACT:
A multiply-acting powder metal press is disclosed for making green form double helical gear compacts. The press has inner and outer lower punches, and an upper, outer punch. The upper and lower outer punches have left hand and right hand external helical profiles as chosen to produce a desired helical gear. The punches co-operate with left hand and right hand helical dies carried by the press about the punches. The helical faces require that the dies rotate relative to the punches during operation. A cam and roller mechanism may drive this rotation. The compact forming process commences with an open position in which powder is introduced to a vacant lower die cavity. The upper portions of the press advance downward to close the cavity. All parts of the press except the lower inner, or transfer, punch then move downward at the same speed to transfer powder to the extremities of the cavity. When transfer is complete both lower punches may be stopped, while the upper punches continue to advance. The dies advance at half the speed of the upper punches, rotating partially as they do so. Once the powder reaches its compacted density the upper and lower punches cease motion, but they dies continue to turn, separating themselves and compressed part. Finally the part is ejected and the press returns to the initial condition.
REFERENCES:
patent: 2561735 (1951-07-01), Haller
patent: 3020589 (1962-02-01), Maritano
patent: 3394432 (1968-07-01), Laurent
patent: 3694127 (1972-09-01), Takahashi et al.
patent: 3752622 (1973-08-01), Viadana
patent: 3773446 (1973-11-01), Borrini
patent: 3842646 (1974-10-01), Kuhn
patent: 3891367 (1975-06-01), Signora
patent: 3909167 (1975-09-01), Signora
patent: 4008021 (1977-02-01), Fedrigo et al.
patent: 4043385 (1977-08-01), Petrenchik
patent: 4047864 (1977-09-01), De Santis
patent: 4053267 (1977-10-01), De Santis
patent: 4061452 (1977-12-01), De Santis
patent: 4061453 (1977-12-01), De Santis
patent: 4087221 (1978-05-01), Munson et al.
patent: 4153399 (1979-05-01), De Santis
patent: 4270890 (1981-06-01), Ottl
patent: 4401614 (1983-08-01), De Santis
patent: 4482307 (1984-11-01), Schaidl et al.
patent: 4573895 (1986-03-01), De Santis
patent: 4666389 (1987-05-01), Relis et al.
patent: 4853180 (1989-08-01), Howard
patent: 4923382 (1990-05-01), Klein
patent: 5024811 (1991-06-01), Hinzmann et al.
patent: 5043111 (1991-08-01), Hinzmann et al.
patent: 5043123 (1991-08-01), Gormanns et al.
patent: 5049054 (1991-09-01), Schaidl et al.
patent: 5156854 (1992-10-01), Yamada
patent: 5238375 (1993-08-01), Hirai
patent: 5259744 (1993-11-01), Take
patent: 5326242 (1994-07-01), Katagiri et al.
patent: 5366363 (1994-11-01), Good et al.
patent: 5401153 (1995-03-01), Katagiri et al.
patent: 5478225 (1995-12-01), Takeuchi et al.
patent: 5498147 (1996-03-01), Katagiri et al.
patent: 5698149 (1997-12-01), Hinzmann et al.
SAE Technical Paper Series 960278, Nagata and Sugimoto, Feb. 26-29, 1996 "The Development of P/M Complicated Shape Helical Gears".
Jones Kenneth M.
Silbaugh Jan H.
Stackpole Limited
LandOfFree
Compacted-powder opposed twin-helical gears and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compacted-powder opposed twin-helical gears and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compacted-powder opposed twin-helical gears and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-991314