US4364720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding machine and system for accomodating a plurality of such machines
Assignee: Ryder International Corp
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Filing: 1980-12-22
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Granted: 1982-12-21
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Expires: 2000-12-22
Abstract
Abstract There is disclosed an improved molding machine and a system for utilizing said machine, wherein central sources of supply are used to provide the operating requirements for the machine, such as high pressure hydraulic fluid, compressed air, cooling water and electic power. The machine disclosed utilizes a stationary platen and a movable platen, with a novel mold clamping arrangement as an integral part of the movable platen assembly. In this regard, said movable platen includes a pair of relatively movable plate members, with a high pressure diaphragm interposed therebetween. On the rearward most plate member there is mounted latching means for fixing the position of said rearward plate member preparatory to pressurizing of the diaphragm. When pressurized, the diaphragm will force the forward most plate member toward the stationary platen to effect the desired preloading of the mold inserts carried by said platens.
Inventors
- 👤 Francis E. Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:36
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/4005; B29C45/03; B29C45/64; B29C45/67; B29C45/6707
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
210 words
An injection molding machine including means for injecting thermoplastic material into a mold cavity defined by at least two mold components, which components are capable of being placed in preloaded, clamped abutting relationship means for producing relative movement and preloading of said mold components, said means comprising a first stationary platen for accomodating one of a pair of mold components, and a second, relatively movable platen for accomodating the other of a pair of mold components, said second relatively movable platen comprising, a forward plate member and rearward plate member, means for fixing the position of the rearward plate member, resilient diaphragm means interposed intermediate said forward and said rearward plate member, said resilient diaphragm means providing a diaphragm chamber and means for pressurizing said diaphragm chamber with a fluid medium to expand said resilient diaphragm means, and to force said forward plate member away from said fixed rearward plate member and toward said stationary platen, such that the abutting mold components carried by said first and second platens will be brought into clamped, preloaded relation preparatory to the injection of thermoplastic material as a step in the molding process the resiliency of said diaphragm means serving to aid in the expelling of the fluid medium from said diaphragm chamber.
Claim 2
Dependent Claim
210 words
An injection molding machine including means for injecting thermoplastic material into a mold cavity defined by at least two mold components, which components are capable of being placed in preloaded, clamped abutting relationship means for producing relative movement and preloading of said mold components, said means comprising a first stationary platen for accomodating one of a pair of mold components, and a second, relatively movable platen for accomodating the other of a pair of mold components, said second relatively movable platen comprising, a forward plate member and rearward plate member, means for fixing the position of the rearward plate member, resilient diaphragm means interposed intermediate said forward and said rearward plate member, said resilient diaphragm means providing a diaphragm chamber and means for pressurizing said diaphragm chamber with a fluid medium to expand said resilient diaphragm means, and to force said forward plate member away from said fixed rearward plate member and toward said stationary platen, such that the abutting mold components carried by said first and second platens will be brought into clamped, preloaded relation preparatory to the injection of thermoplastic material as a step in the molding process the resiliency of said diaphragm means serving to aid in the expelling of the fluid medium from said diaphragm chamber.
Claim 3
Dependent Claim
31 words
An injection molding machine according to claim 1, wherein said machine includes tie-rod means comprised of three equi-spaced tie-rod members upon which said second relatively moveable platen is mounted for movement.
Claim 4
Dependent Claim
128 words
A mold machine according to claim 1 wherein one of said platens includes a pair of cavities each for receiving a mold insert with the other platen having corresponding cavity means for mating mold inserts, said one platen including a partition between each said cavity, which partition defines an end wall surface facing the opposed platen members, said end wall surface having a sprue channel formed therein and leading to each said cavity and adapted to cooperate in a corresponding sprue channel formed therein and leading to each said cavity and adapted to cooperate in a corresponding sprue channel formed in said mold component, and thermo-sensing means permanently associated with said sprue channel to monitor the heat of the thermoplastic material to be injected into the mold cavity.
Claim 5
Dependent Claim
84 words
A machine according to claim 1 wherein said diaphragm means is interposed directly between said forward and rearward plate members, and is formed of an elastomeric material, said diaphragm being clamped to said rearward plate member to define therewith said diaphragm chamber, with the surface of said diaphragm opposite said chamber being in contact with said forward plate member, port means associated with said rearward plate member for introducing pressurized hydraulic fluid into said diaphragm chamber during preloading and clamping of the mold components.
Claim 6
Dependent Claim
41 words
An injection molding machine according to claim 1, further including spring means interposed between said forward and said rearward plate members, said spring means tending to collapse said diaphragm and expel hydraulic fluid therefrom when the diaphragm is no longer pressurized.
Claim 7
Dependent Claim
49 words
A machine according to claim 1, further including means for traversing said relatively movable platen between a first, mold open position and a second, mold closed position, and wherein said means for fixing the position of the rearward plate member of said second platen, comprises selectively operable latch means.
Claim 8
Dependent Claim
110 words
An injection molding machine according to claim 6, wherein said molding machine includes tie-rod means upon which said second platen member is mounted for relative movement, said latch comprising one or more notches formed in said tie-rod means at a predetermined location along the length thereof, a latch member rotatably carried by said rearward plate member, said latch member including arm means for engagement in said notch means, such that said second platen can be moved into position and said latch member rotated to engage said arm means in said notch means thereby fixing the position of said rearward plate member relative to said tie-rods and said forward plate member.
Claim 9
Dependent Claim
40 words
A molding machine according to claim 1 wherein said first and second platens can be brought into abutting relation, each said platen including cavity means formed therein, which cavity means are designed to receive and retain mating mold insert components.
Claim 10
Dependent Claim
88 words
A molding machine according to claim 8 wherein said stationary platen includes ejector means comprised of a movable ejector plate and ejector pins associated with said plate, and return pin means carried by said plate, and extending beyond the end face of said first platen, such that movement of the movable platen to the closed position will engage said return pin, causing same to be retracted relative to said platen end face, thereby producing movement of the ejector plate and ejector pin means to their mold closed position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |