Patent US4770834A successfully refreshed from Google Patents.
US4770834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for continuous molding of a rod-like product
Assignee: Ube Exsymo Co Ltd
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Filing: 1986-10-15
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Granted: 1988-09-13
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Expires: 2006-10-15
Abstract
Abstract A method of continuous molding a rod-like product includes forming an uncured rod-like molding by passing reinforcing fibers impregnated with uncured thermosetting resin through a squeezing die having a predetermined shape. Molten thermoplastic fluororesin is extruded in a ring shape to enclose the rod-like molding. A sheathing layer of the thermoplastic resin is formed by causing the thermoplastic resin to come into contact with the outer periphery of the uncured rod-like molding and by cooling and solidifying the thermoplastic resin. The uncured rod-like molding and the sheathing layer are introduced into a heated tank thereby hardening the thermosetting resin. The sheathing layer is stripped from the molding to form a rod-like product having a surface of fiber reinforced thermosetting resin.
Inventors
- 👤 Takayoshi Nakasone
- 👤 Yoji Ida
- 👤 Kazuo Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:30
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/54; B29C70/542; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29B15/125; B29C48/00; B29C48/03; B29C48/05; B29C70/40; B29C70/50; B29C70/52; B29C70/521; B29C70/525; B29C70/528; B29C48/001; B29C48/0018; B29C48/0021; B29C48/0022; B29C48/06; B29C48/15; B29C48/154; B29K; B29K2027/00; B29K2027/12; B29K2101/00; B29K2101/10; B29L; B29L2031/00; B29L2031/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A method for continuous molding of a rod-like product, said method comprising the steps of: forming an uncured rod-like molding by passing reinforcing fibers impregnated with uncured thermosetting resin through a squeezing die having a predetermined shape; extruding molten thermoplastic fluororesin in a ring shape in such a manner as to enclose said uncured rod-like molding; forming a sheathing layer of said thermoplastic fluororesin by causing said thermoplastic fluororesin to come into contact with the outer periphery of said uncured rod-like molding at an angle between 5° and 30° and by cooling and solidifying said thermoplastic fluororesin, said cooling beginning substantially at the point of contact between said thermoplastic fluororesin and said uncured rod-like molding; introducing said uncured rod-like molding having said sheathing layer therearound into a heated tank to thereby harden said thermosetting resin; and stripping away said sheathing layer to form a rod-like product having a surface of fiber reinforced thermosetting resin.
Claim 2
Independent Claim
154 words
A method for continuous molding of a rod-like product, said method comprising the steps of: forming an uncured rod-like molding by passing reinforcing fibers impregnated with uncured thermosetting resin through a squeezing die having a predetermined shape; extruding molten thermoplastic fluororesin in a ring shape in such a manner as to enclose said uncured rod-like molding; forming a sheathing layer of said thermoplastic fluororesin by causing said thermoplastic fluororesin to come into contact with the outer periphery of said uncured rod-like molding at an angle between 5° and 30° and by cooling and solidifying said thermoplastic fluororesin, said cooling beginning substantially at the point of contact between said thermoplastic fluororesin and said uncured rod-like molding; introducing said uncured rod-like molding having said sheathing layer therearound into a heated tank to thereby harden said thermosetting resin; and stripping away said sheathing layer to form a rod-like product having a surface of fiber reinforced thermosetting resin.
Claim 3
Dependent Claim
28 words
A method for continuous molding of a rod-like product as claimed in claim 1, comprising forming sheathing layer to have a thickness of 0.07 mm to 0.6 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |