Patent US4738612A successfully refreshed from Google Patents.
US4738612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivotable blow-molding apparatus for molding hollow articles of synthetic resin
Assignee: Placo Co Ltd
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Filing: 1987-08-03
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Granted: 1988-04-19
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Expires: 2007-08-03
Abstract
Abstract A blow-molding apparatus for molding hollow articles is disclosed, which comprises a base member, and a platform mounted thereon. An extruder is provided which has a nozzle located above the platform. Bearings are attached to the upper surface of the platform, and support a shaft. A mold opening/closing device is pivotable mounted on the shaft, and comprises a main body, a pair of mold halves supported by the main body, and a mold-moving unit for moving the molds toward and away from each other. The apparatus further comprises a device for rotating the mold opening/closing device around the shaft, thereby to incline the device at an angle, within a predetermined range, to the horizontal plane. Thus, both mold halves can be inclined, thereby forming an inclined cavity when they are clamped together. A parison can be supplied smoothly from the nozzle into the inclined cavity, under its own weight.
Inventors
- 👤 Masanori Kikuchi
- 👤 Kazutosi Nagahori
- 👤 Shigeharu Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:13
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/56; B29C49/5605; B29C49/02; B29C49/04; B29C49/0411; B29C49/04114; B29C49/28; B29C49/30; B29C49/4242; B29C49/4244; B29C49/42448; B29L; B29L2024/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A blow-molding apparatus comprising: a base member; a platform mounted on said base member; an extruder provided above said platform and having a nozzle for extruding a parison; bearings attached to the upper surface of said platform; a shaft supported by said bearings; a mold opening/closing device pivotably mounted on said shaft and having a main body, a pair of mold halves supported by the main body and opposing each other, and mold opening/closing means for clamping together or separating said mold halves, said mold halves comprising an upper mold half and a lower mold half; and means for rotating said mold opening/closing device around said shaft, thereby to incline said mold halves at an angle, within a predetermined range, to a horizontal direction so that a groove cut in the lower mold half is located below the nozzle thereby allowing a soft parison to be fed smoothly under its own weight into said groove when said mold halves are separated.
Claim 2
Dependent Claim
161 words
A blow-molding apparatus comprising: a base member; a platform mounted on said base member; an extruder provided above said platform and having a nozzle for extruding a parison; bearings attached to the upper surface of said platform; a shaft supported by said bearings; a mold opening/closing device pivotably mounted on said shaft and having a main body, a pair of mold halves supported by the main body and opposing each other, and mold opening/closing means for clamping together or separating said mold halves, said mold halves comprising an upper mold half and a lower mold half; and means for rotating said mold opening/closing device around said shaft, thereby to incline said mold halves at an angle, within a predetermined range, to a horizontal direction so that a groove cut in the lower mold half is located below the nozzle thereby allowing a soft parison to be fed smoothly under its own weight into said groove when said mold halves are separated.
Claim 3
Dependent Claim
34 words
The blow-molding apparatus according to claim 1, wherein said shaft supporting said mold opening/closing device extends at right angles to the direction in which said mold halves are moved by said mold opening/closing device.
Claim 4
Dependent Claim
64 words
The blow-molding apparatus according to claim 2, wherein said means for inclining said mold opening/closing device is attached to said mold opening/closing device so as to lift said upper mold half, while positioning the lower mold half below the nozzle of said extruder, and the main body of said mold opening/closing device is mounted on said shaft located close to the lower mold half.
Claim 5
Dependent Claim
29 words
The blow-molding apparatus according to claim 1, wherein said mold opening/closing device has adjusting means for adjusting the position of said lower mold half prior to commencement of blow-molding.
Claim 6
Dependent Claim
31 words
The blow-molding apparatus according to claim 1, further comprising platform-moving means secured to said base member, for moving said platform in a horizontal plane perpendicular to the axis of said nozzle.
Claim 7
Dependent Claim
55 words
The blow-molding apparatus according to claim 5, wherein said paltform-moving means comprises a first drive device, for moving said platform in a direction parallel to the axis of said shaft, and a second drive device, for moving said platform in a horizontal plane, in a direction at right angles to the axis of said shaft.
Claim 8
Dependent Claim
47 words
The blow-molding apparatus according to claim 3, further comprising mold-moving means secured to the main body of said mold opening/closing device, for moving said lower mold half in a plane perpendicular to the direction in which said mold halves are moved toward or away from each other.
Claim 9
Dependent Claim
53 words
The blow-molding apparatus according to claim 7, wherein said mold-moving means comprises a first mold-moving device, for moving the mold halves in a direction parallel to the axis of said shaft, and a second mold-moving device, for moving the mold halves in a direction at right angles to the axis of said shaft.
Claim 10
Dependent Claim
21 words
The blow-molding apparatus according to claim 7, wherein said mold-moving means is an X-Y crosstable able to move in two directions.
Claim 11
Dependent Claim
17 words
The blow-molding apparatus according to claim 9, wherein said X-Y cross-table is a numericaly controlled one-stroke type.
References Cited (Backward Citations)
DK101026C
Cited
JPS4918748A
Cited
JPS5356262A
Cited
JPS5415580A
Cited
JPS5521239A
Cited
US4239474A
Cited
US4362688A
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |