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US4599062A Expired / Lapsed US ⏱️ 0.0 years remaining

Encapsulation molding apparatus

Assignee: I Pex Inc
•
Filing: 1982-01-25
•
Granted: 1986-07-08
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Expires: 2002-01-25
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Abstract

Abstract The disclosure is directed to an encapsulation molding apparatus to be used for subjecting small-sized electrical elements to encapsulation molding by a synthetic resin material. The present invention has been presented for the purpose of shortening the cycle time required for the encapsulation molding, and also, reducing cost necessary for molding metal molds, and installation cost for a molding press, etc., with a simultaneous reduction of a loss in the synthetic resin material. More specifically, in the apparatus of the present invention, for subjecting small-sized electrical elements to encapsulation molding by the synthetic resin material, pots (30) for charging the synthetic material thereinto are provided at preferably equal intervals with respect to a plurality of cavities provided in an upper mold (11) and a lower mold (12) for the formation of encapsulation molded portions, while extruding plungers (31) are provided for the respective pots for effecting the encapsulation molding. The apparatus according to the present invention may be advantageously employed as a resin encapsulating apparatus for semi-conductor devices, etc.

Inventors

  • 👤 Akira Konishi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 14:31
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14639; B29C45/14655; B29C45/02

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 117 words
An encapsulating molding apparatus, comprising: an upper mold, having a plurality of cavities; a lower mold opposing said upper mold and having cavities corresponding to said upper mold cavities; a plurality of pots disposed on one of said molds for supplying a plastic material or the like to said cavities; a plurality of extruding plungers, each one slideable with a corresponding pot, said extruding plungers being supported by an extruding plate, and said extruding plate being connected to a rod of a pressure cylinder for moving said plungers within said pots; and a plurality of gates exclusively connecting each one of said pots to a plurality of said cavities for conveying the plastic material to said cavities.
Claim 2
Dependent Claim 117 words
An encapsulating molding apparatus, comprising: an upper mold, having a plurality of cavities; a lower mold opposing said upper mold and having cavities corresponding to said upper mold cavities; a plurality of pots disposed on one of said molds for supplying a plastic material or the like to said cavities; a plurality of extruding plungers, each one slideable with a corresponding pot, said extruding plungers being supported by an extruding plate, and said extruding plate being connected to a rod of a pressure cylinder for moving said plungers within said pots; and a plurality of gates exclusively connecting each one of said pots to a plurality of said cavities for conveying the plastic material to said cavities.
Claim 3
Dependent Claim 19 words
The encapsulation molding apparatus of claim 1, including means for elastically supporting said extruding plungers on said extruding plate.
Claim 4
Dependent Claim 28 words
The encapsulation molding apparatus of claim 1, wherein said gates, connecting each one of said pots to said plurality of corresponding cavities, have lengths equal to one another.
Claim 5
Dependent Claim 21 words
The encapsulation molding apparatus of claim 3, wherein four gates extend from each one of said pots to four corresponding cavities.
Claim 6
Dependent Claim 24 words
The encapsulation molding apparatus of claim 2, wherein said elastically supporting means includes a spring disposed between each extruding plunger and said extruding plate.

References Cited (Backward Citations)

US2382200A Cited
US3013308A Cited
JPS5243366A Cited
JPS53143656A Cited
JPS54101858A Cited
JPS54152970A Cited
US4368168A Cited
DE2900114A1 Cited
JPS5529813A Cited
US4347211A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-07-07 1990-01-06 1990-07-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-07-07 1994-01-06 1994-07-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-07-07 1998-01-06 1998-07-08 $7700.00 Window Closed / Lapsed

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