Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Patent
1993-04-23
1994-12-13
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
249 94, 249 95, 249 97, 264 25, 264275, 425116, 4251291, B29C 4514, G02B 638
Patent
active
053727584
ABSTRACT:
The present invention relates to a mold for simultaneously molding a plurality of ferrules onto a corresponding number of optical fibers. The mold preferably includes a runner plate, a first cavity plate, a second cavity plate, and a support plate, each of which is to be inserted between a movable top plate and a fixed bottom plate of a transfer molding machine. The plates to be inserted have a vertical inlet channel and primary and secondary runners for distributing molding compound. These runners lead to a plurality of first and second mutually coincidental mold cavities arranged in rows in the first and second cavity plates, respectively. In a preferred embodiment, each of the first and second mold cavities are made up of mutually coincidental, cylindrical coaxial parts and a larger coaxial, cylindrical bore formed in one or both cavity plates. The dividing plane between the first and second cavity plates coincides with the wider bore. The second mold cavity is formed in a conical insert which is inserted into the second cavity plate. The support plate includes narrow optical fiber receiving slots.
REFERENCES:
patent: 2242117 (1941-05-01), English et al.
patent: 3739438 (1973-06-01), Lambrecht
patent: 4107242 (1978-08-01), Runge
patent: 4543228 (1985-09-01), Bingler
patent: 4689005 (1987-08-01), Plummer
patent: 4942009 (1990-07-01), Ohshima
Ahlner Eva
Engstrand Jan-Ake
Eriksen Paul A.
Jonas Ivan
Lundstrom Lars E. P.
Davis Robert B.
Telefonakitebolaget L M Ericsson
Woo Jay H.
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