US4315725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jig for orientation-blow molding piece
Assignee: Yoshino Kogyosho Co Ltd
•
Filing: 1980-06-17
•
Granted: 1982-02-16
•
Expires: 2000-06-17
Abstract
Abstract A jig used for a blow-molding machine for fabricating a bottle-shaped container of biaxially oriented plastic, which comprises advantageously a core shaft elevationally movably inserted in a mandrel and having a blow-molding air passage for longitudinally orienting the piece, and a heat insulating layer provided on the outer periphery of the core shaft for heating the piece upon irradiation of heat rays such as far infrared rays to thereby externally heat the piece and also internally heat the piece. Thus, the piece is uniformly heated in or immediately before the blow-molding of the piece so as to improve the molding accuracy of the piece into a bottle-shaped container in the blow molding mold.
Inventors
- 👤 Yataro Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:53
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/64; B29C49/68; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0811; B29C2035/0822; B29C2949/00; B29C2949/07; B29C2949/0715; B29C49/02; B29C49/06; B29C49/08; B29C49/10; B29C49/12; B29C49/121; B29C49/1216
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A device for heating an injection molded resin piece having a neck, prior to biaxial orientation blow molding, comprising: a rotary turntable; a cover disposed above and spaced from said turntable; a jig disposed at the periphery of said turntable, comprising: a neck support for holding the piece in neck portion downward position; a mandrel disposed beneath said neck support; an elevationally reciprocally movable core shaft inserted in said mandrel and extending through said neck support for longitudinally orienting the piece, having a blow-molding air-passage; a heat-insulating layer coated on the outer periphery of said core shaft; a plurality of infrared or far infrared ray heating elements disposed inside said cover in the vicinity of the periphery of the turntable, said insulating layer comprising material which will cause heating of the interior of the piece held by said jig due to heating of said insulating layer by special wavelength rays of said heating elements upon irradiation of said heating elements.
Claim 2
Independent Claim
160 words
A device for heating an injection molded resin piece having a neck, prior to biaxial orientation blow molding, comprising: a rotary turntable; a cover disposed above and spaced from said turntable; a jig disposed at the periphery of said turntable, comprising: a neck support for holding the piece in neck portion downward position; a mandrel disposed beneath said neck support; an elevationally reciprocally movable core shaft inserted in said mandrel and extending through said neck support for longitudinally orienting the piece, having a blow-molding air-passage; a heat-insulating layer coated on the outer periphery of said core shaft; a plurality of infrared or far infrared ray heating elements disposed inside said cover in the vicinity of the periphery of the turntable, said insulating layer comprising material which will cause heating of the interior of the piece held by said jig due to heating of said insulating layer by special wavelength rays of said heating elements upon irradiation of said heating elements.
Claim 3
Dependent Claim
21 words
A device according to claim 1, further comprising a core guide made of refractory synthetic resin disposed in the neck support.
Claim 4
Dependent Claim
73 words
A device according to claim 1, wherein said neck support is disposed above a heat-insulating plate provided on the top of said mandrel, and said core shaft further comprises a core top made of heat-insulating material having an inverted taper shape or spherical shape for stopping the heat conduction to and from the piece and for preventing the piece from sticking onto the core shaft when it is subjected to the longitudinal orientation.
Claim 5
Dependent Claim
30 words
A device according to claim 1, wherein said core shaft is made of iron alloy, and said device further comprises a high frequency induction heater for heating said core shaft.
Claim 6
Dependent Claim
15 words
A device according to claim 1, wherein said heat-insulating layer is made of zirconium ceramic.
References Cited (Backward Citations)
CH483917A
Cited
JPS471118U
Cited
JPS4932778A
Cited
FR2193694A1
Cited
JPS52515A
Cited
US4233010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |