US3740179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-part injection moulding die means
Assignee: Schmidt and Clemens GmbH and Co
•
Filing: 1970-12-15
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Granted: 1973-06-19
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Expires: 1990-12-15
Abstract
Abstract Injection moulding apparatus having injection means and one or more runners for the distribution of moulding material in plastic form to one or more mould cavities. A temperature controlling device for maintaining the plastic flow condition of the moulding material is located in the runner and comprises a hollow member substantially coextensive therewith. Such member is detachably securable to an interior side wall, preferably in a recess, of the runner and includes an occludable opening accessible exteriorly of the apparatus for the ready introduction of heating or cooling media such as fluids or electric heating elements as desired.
Inventors
- 👤 W Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:55
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/30; B29C45/2737; B29C45/2738
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
In a multipart injection molding machine having injection means and a mold cavity, a runner plate assembly with at least one runner for distributing molding material in plastic state from said injection means to said mold cavity, at least one elongated temperature control device detachably secured within said runner at and along an interior wall of the runner by being detachably mounted within a recess formed in an interior side wall of said runner and extending over at least part of the length of the runner with said elongated temperature control device being proportional and dimensioned relative to said recess to provide an air gap between an outer portion of the side walls of the recess and said elongated temperature control device.
Claim 2
Dependent Claim
122 words
In a multipart injection molding machine having injection means and a mold cavity, a runner plate assembly with at least one runner for distributing molding material in plastic state from said injection means to said mold cavity, at least one elongated temperature control device detachably secured within said runner at and along an interior wall of the runner by being detachably mounted within a recess formed in an interior side wall of said runner and extending over at least part of the length of the runner with said elongated temperature control device being proportional and dimensioned relative to said recess to provide an air gap between an outer portion of the side walls of the recess and said elongated temperature control device.
Claim 3
Dependent Claim
60 words
Mold apparatus as claimed in claim 1 wherein said passageway is of elongated form extending substantially parallel with the direction of said runner with which said elongated temperature control device is installed, and said elongated temperature control device is formed with a substantially streamlined exterior configuration for facilitating flow of said plastic material thereover during its passage through said runner.
Claim 4
Dependent Claim
23 words
The invention of claim 1 additionally including an insulating strip interposed between said elongated temperature control device and the base of said recess.
Claim 5
Dependent Claim
54 words
Mould apparatus as claimed in claim 1, wherein said elongated temperature control device comprises a casing and a core providing a hollow passageway for accommodating a temperature controlling medium therein, said passageway being formed with a closeable opening accessible from the exterior of the apparatus for facilitating introduction of said medium to said passageway.
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |