US3635635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow molding machine with pressure means for holding neck and body mold sections tightly together during molding operations
Assignee: Individual
•
Filing: 1970-06-11
•
Granted: 1972-01-18
•
Expires: 1990-06-11
Abstract
Abstract A blow molding machine for producing for instance, plastic bottles, and wherein the machine molds the bottles on horizontally arranged parison and blow molds comprising a central parison mold and a pair of blow molds disposed generally on either side of the parison mold. The molds comprise upper and lower neck section mold halves and upper and lower body section mold halves with the halves being relatively movable with respect to one another for opening and closing the molds in a general vertical direction. The mold halves when closed define the mold cavity of the respective mold, and the neck mold sections are adapted for longitudinal abutting relation with the body sections during molding operations. Pressure-applying means are provided coacting with the mold sections to urge the latter longitudinally together for maintaining a tight abutting relationship between the neck mold sections and the body mold sections in the closed condition of the molds, so that leakage can not occur between the body and neck mold sections, while providing in the deactuated condition of the pressure-applying means, for ready opening and closing movement of the mold sections without interference between the neck mold sections and the body mold sections.
Inventors
- 👤 Ernest P Moslo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/06; B29C49/061; B29C49/064; B29C2049/023
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
277 words
In a blow molding machine for making hollow articles such as bottles, comprising a generally central parison mold and a pair of blow molds disposed one on either side of the parison mold, said molds comprising upper and lower halves, said halves being relatively movable with respect to one another for opening and closing the molds in a generally vertical direction, said halves when closed defining generally the body section of the mold cavity of the respective mold, laterally and vertically shiftable means adapted for coaction with the molds with a pair of core rod means mounted on said shiftable means and laterally spaced so as to be alternately projected between the halves of pairs of adjacent molds one of which is always said parison mold, laterally spaced neck mold sections mounted on said shiftable means in coacting relation with respective of said core rod means and adapted for coaction with confronting of said body mold sections for defining the parison and blow mold cavities, each neck mold section comprising a pair of coacting halves movable relative to one another for opening and closing said neck mold sections, and means operable from an inactive to an active condition and vice versa, the last-mentioned means coacting with said mold sections for urging the latter longitudinally into tight abutting relation with respect to one another for preventing leakage between the body and neck sections of the respective mold in the active condition of said last-mentioned means, and in said inactive condition, said last-mentioned means providing for ready vertical movement of the body mold section with respect to the associated neck mold section during opening and closing of the molds.
Claim 2
Dependent Claim
277 words
In a blow molding machine for making hollow articles such as bottles, comprising a generally central parison mold and a pair of blow molds disposed one on either side of the parison mold, said molds comprising upper and lower halves, said halves being relatively movable with respect to one another for opening and closing the molds in a generally vertical direction, said halves when closed defining generally the body section of the mold cavity of the respective mold, laterally and vertically shiftable means adapted for coaction with the molds with a pair of core rod means mounted on said shiftable means and laterally spaced so as to be alternately projected between the halves of pairs of adjacent molds one of which is always said parison mold, laterally spaced neck mold sections mounted on said shiftable means in coacting relation with respective of said core rod means and adapted for coaction with confronting of said body mold sections for defining the parison and blow mold cavities, each neck mold section comprising a pair of coacting halves movable relative to one another for opening and closing said neck mold sections, and means operable from an inactive to an active condition and vice versa, the last-mentioned means coacting with said mold sections for urging the latter longitudinally into tight abutting relation with respect to one another for preventing leakage between the body and neck sections of the respective mold in the active condition of said last-mentioned means, and in said inactive condition, said last-mentioned means providing for ready vertical movement of the body mold section with respect to the associated neck mold section during opening and closing of the molds.
Claim 3
Dependent Claim
49 words
A blow molding machine in accordance with claim 1 wherein said last-mentioned means comprises fluid pressure operated pressure-applying means operative when in said active condition to force a respective neck mold section longitudinally of the respective core rod means into tight coacting engagement with a confronting body mold section.
Claim 4
Dependent Claim
27 words
A blow molding machine in accordance with claim 1 including control means for automatically actuating said last-mentioned means to said active position upon closure of said molds.
Claim 5
Dependent Claim
51 words
A blow molding machine in accordance with claim 3 wherein said control means includes means for automatically deactuating said last-mentioned means upon completion of the blowing operation in said blow molds, whereby said body mold section can readily move vertically relative to the respective neck mold section for opening the mold.
Claim 6
Dependent Claim
62 words
A blow molding machine in accordance with claim 1 wherein said last mentioned means comprises a plurality of laterally spaced fluid-powered motor units operable when in said active condition to urge the neck mold sections into tight fitting relation against the respective body mold sections of the mold cavities and for permitting clearance between said sections when said motor units are deactuated.
Claim 7
Dependent Claim
71 words
A blow molding machine in accordance with claim 1 wherein said core rod means is sequentially shiftable upwardly, laterally, and downwardly by said laterally and vertically shiftable means, and from positions within one lower blow mold body section half and lower parison mold body section half, to positions respectively within said lower parison mold body section half and the other blow mold body section half each time said molds are opened.
Claim 8
Dependent Claim
50 words
A blow molding machine in accordance with claim 1 wherein said blow molds comprise movable rear wall sections defining the respective blow mold cavity, said rear wall sections being movable out of interferring relation with the formed bottle prior to removal of the formed article from the associated blow mold.
Claim 9
Dependent Claim
68 words
A blow molding machine in accordance with claim 1 including holder means for said last-mentioned means, said holder means including cam means thereon, said neck mold sections being supported by said holder means, and means coacting with said cam means for causing vertical separation of said neck mold sections for permitting ejection of the blown article from the respective core rod means after opening of the blow molds.
Claim 10
Dependent Claim
131 words
A blow molding machine in accordance with claim 6 wherein each of said core rod means comprises a support fixedly mounted on said laterally and vertically shiftable means, with laterally spaced core rods projecting rearwardly therefrom, upper and lower wedge members encompassing said core rods for longitudinal movement relative thereto, said last-mentioned means comprising a series of laterally spaced fluid pressure actuated reciprocal motor units mounted in each of said wedge members, said neck mold sections being supported by said wedge members, and means for causing vertical opening movement of said neck mold sections for permitting ejection of the blown article from the respective core rod means after opening of the molds, said vertical opening movement means being operable after completion of the blowing operation and deactuation of said motor units.
Claim 11
Dependent Claim
43 words
A blow molding machine in accordance with claim 9 wherein each of said supports of said core rod means includes wear plates adapted for coaction with said motor units at the engagement of said motor units with said supports for preventing wear therebetween.
Claim 12
Dependent Claim
63 words
A blow molding machine in accordance with claim 9 wherein each of said motor units comprises a fluid powered, reciprocal piston and cylinder unit with the piston rod thereof having a generally pointed configuration at its distal end for application of point pressure to the respective of said supports, and means on each motor unit for securing it to the respective wedge members.
Claim 13
Dependent Claim
68 words
A blow molding machine in accordance with claim 9 wherein said vertical opening movement means comprises cam means on said wedge members coacting with cam means on the respective of said supports, and means coacting with said wedge members and said neck mold sections for causing longitudinal shifting movement of the latter with respect to the core rod means, thereby causing actuation of said vertical opening movement means.
References Cited (Backward Citations)
US2864124A
Cited
US3116516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |