US3737268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus
Assignee: VALUE ENGINEERED CO
•
Filing: 1971-06-09
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Granted: 1973-06-05
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Expires: 1991-06-09
Abstract
Abstract Molding apparatus comprises companion mold members with mold cavity insert assemblies removably mounted thereon. The insert assemblies comprise blocks which form the mold cavity portions and which are separated by divider bars, the latter having transverse runners communicating the mold sprue with the cavity portions of the block. The insert assemblies on one of the mold members have ejector mechanisms which can be readily coupled to the ejector drive of the apparatus. The ejector drive may also include an ejector pin that ejects the molded runner portion in the divider bar. The ejector mechanism for the inserts may be tubular or solid pins, or rotatable members for unscrewing threaded molded parts from the mold.
Inventors
- 👤 F Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:18
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/26; B29C45/2618; B29C45/262; B29C45/2673; B29C45/2675; B29C45/2681; Y; Y10; Y10S; Y10S425/00; Y10S425/058
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
201 words
Molding apparatus comprising companion mold members movable to and from open and closed positions, insert assemblies in said mold members and having recesses cooperating to provide a mold cavity when the mold members are in their closed positions, means removably mounting said insert assemblies in said mold members, and an ejector plate movably mounted in one of said mold members and having means for imposing ejecting force on a portion of a molded piece in said cavity; the insert assemblies that are in said one mold member each including a block that contains a recess portion that forms part of said mold cavity, ejector means movable in each said block for imposing ejecting force on the part of said molded piece in said recess portion thereof, a holder for said ejector means, and cooperating means on said holder and said ejector plate for detachably securing said holder to said ejector plate; said cooperating means including a faStener element projecting laterally from said ejector plate and said one mold member being laterally open to provide access to said fastener element; said block, said ejector means, said holder and the means thereon constituting a removable and replaceable unit for said one mold member.
Claim 2
Dependent Claim
201 words
Molding apparatus comprising companion mold members movable to and from open and closed positions, insert assemblies in said mold members and having recesses cooperating to provide a mold cavity when the mold members are in their closed positions, means removably mounting said insert assemblies in said mold members, and an ejector plate movably mounted in one of said mold members and having means for imposing ejecting force on a portion of a molded piece in said cavity; the insert assemblies that are in said one mold member each including a block that contains a recess portion that forms part of said mold cavity, ejector means movable in each said block for imposing ejecting force on the part of said molded piece in said recess portion thereof, a holder for said ejector means, and cooperating means on said holder and said ejector plate for detachably securing said holder to said ejector plate; said cooperating means including a faStener element projecting laterally from said ejector plate and said one mold member being laterally open to provide access to said fastener element; said block, said ejector means, said holder and the means thereon constituting a removable and replaceable unit for said one mold member.
Claim 3
Dependent Claim
33 words
Molding apparatus according to claim 1 including return pins secured to said ejector plate, and spring means surrounding said return springs for returning said pins from an ejecting position to a molding position.
Claim 4
Dependent Claim
14 words
Molding apparatus according to claim 1 in which said ejector means includes a pin.
Claim 5
Dependent Claim
15 words
Molding apparatus according to claim 1 in which said ejector means includes a tubular element.
Claim 6
Dependent Claim
26 words
Molding apparatus according to claim 1 in which said ejector means comprises a rotatable member for ejecting a threaded molded part from said one mold member.
Claim 7
Dependent Claim
28 words
Molding apparatus according to claim 1 in which said cooperating means includes at least one pin on said holder engageable with said fastener element on said ejector plate.
Claim 8
Dependent Claim
153 words
Molding apparatus comprising a mold member having openings at one side, insert assemblies each including blocks in said openings and each having a recess that forms part of a mold cavity, a divider bar between said blocks and having a runner for conveying molding material to the recesses in said blocks, clamps secured to the front face of said mold member and an adjacent front face of each block for removably retaining the blocks in said openings, said apparatus including ejector drive mechanism, ejector structure at the rear of each block and including means for imposing ejecting force at said recesses, and means for removably connecting said ejector structure to said ejector drive mechanism; said last-named means comprising a fastener projecting through one of the openings at the side of said mold member and through said ejector drive mechanism, and a member secured to said ejector structure and slidably interfitting with said fastener.
Claim 9
Dependent Claim
153 words
Molding apparatus comprising a mold member having openings at one side, insert assemblies each including blocks in said openings and each having a recess that forms part of a mold cavity, a divider bar between said blocks and having a runner for conveying molding material to the recesses in said blocks, clamps secured to the front face of said mold member and an adjacent front face of each block for removably retaining the blocks in said openings, said apparatus including ejector drive mechanism, ejector structure at the rear of each block and including means for imposing ejecting force at said recesses, and means for removably connecting said ejector structure to said ejector drive mechanism; said last-named means comprising a fastener projecting through one of the openings at the side of said mold member and through said ejector drive mechanism, and a member secured to said ejector structure and slidably interfitting with said fastener.
Claim 10
Dependent Claim
43 words
Molding apparatus according to claim 1 including a plurality of openings, an insert block in each opening, and means constituting parts of said insert assemblies for operatively supporting for simultaneous operation ejector means comprising a tubular element, a pin, and a rotatable element.
Claim 11
Dependent Claim
29 words
Molding apparatus according to claim 1 in which said apparatus includes support bars, and said one mold member has means for slidably suspending the same from said support bars.
Claim 12
Dependent Claim
130 words
Molding apparatus comprising a mold member having at one face thereof a forward and laterally presented opening, said mold member also having means defining a hole that is spaced from said face, said hole being smaller than said opening, ejector means in said mold member and having means for releasable coupling with an ejector holder, said ejector means having a hole that is smaller than the first-mentioned hole and spaced therefrom and telescopically receiving said ejector holder, and a member having hole that is smaller than the hole in the ejector means and adjacent to which said ejector holder is positioned when said ejector means is retracted, and means projecting through the hole in said member for operating said ejector means, the three holes and the opening being generally aligned.
Claim 13
Dependent Claim
130 words
Molding apparatus comprising a mold member having at one face thereof a forward and laterally presented opening, said mold member also having means defining a hole that is spaced from said face, said hole being smaller than said opening, ejector means in said mold member and having means for releasable coupling with an ejector holder, said ejector means having a hole that is smaller than the first-mentioned hole and spaced therefrom and telescopically receiving said ejector holder, and a member having hole that is smaller than the hole in the ejector means and adjacent to which said ejector holder is positioned when said ejector means is retracted, and means projecting through the hole in said member for operating said ejector means, the three holes and the opening being generally aligned.
Claim 14
Dependent Claim
27 words
Molding apparatus according to claim 10 including rotatable ejector drive mechanism projecting through the hole in said member and also through the hole in said ejector means.
Claim 15
Dependent Claim
18 words
Molding apparatus according to claim 11 including ejector means in said opening and telescoped with said drive mechanism.
Claim 16
Dependent Claim
22 words
Molding apparatus according to claim 10 in which said opening is defined at least in part by elements that are keyed together.
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |