NL7711796A - Sliding sleeve insert pins for injection moulding undercut profiles - suitable for disengaging small diameter recesses - Google Patents
Sliding sleeve insert pins for injection moulding undercut profiles - suitable for disengaging small diameter recessesInfo
- Publication number
- NL7711796A NL7711796A NL7711796A NL7711796A NL7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A
- Authority
- NL
- Netherlands
- Prior art keywords
- sleeves
- core
- small diameter
- injection moulding
- sliding sleeve
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Cavity inserts comprise a stationary core having tapered faces supporting segmented sleeves which can slide along dovetailed beds on the core faces. Alternate beds lie at different angles to the core axis so that adjacent sliding sleeves converge radially at different rates. Adjacent sleeves have complementary arcuate and trapezoidal cross-sections with bevelled edges which mate so that the sleeves present a continuous surface when fully deployed radially. The trapezoidal sleeves ride the steeper core faces to make room for the overlapping arcuate sleeves to also converge, more slowly on the shallower slopes. Used for captive inserts to remain in an injection moulding tool and release ribbed or undercut recesses in the moulding. Simple and compact enough for automatic cycling and small diameter recesses.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7711796A NL188626C (en) | 1977-10-27 | 1977-10-27 | SPREADING CORE FOR THE MANUFACTURE OF NOZZLES. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7711796A NL188626C (en) | 1977-10-27 | 1977-10-27 | SPREADING CORE FOR THE MANUFACTURE OF NOZZLES. |
Publications (3)
Publication Number | Publication Date |
---|---|
NL7711796A true NL7711796A (en) | 1979-05-02 |
NL188626B NL188626B (en) | 1992-03-16 |
NL188626C NL188626C (en) | 1992-08-17 |
Family
ID=19829421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7711796A NL188626C (en) | 1977-10-27 | 1977-10-27 | SPREADING CORE FOR THE MANUFACTURE OF NOZZLES. |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL188626C (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR978063A (en) * | 1948-11-15 | 1951-04-09 | Advanced mold for the manufacture of hollow objects by injection of thermoplastic materials | |
NL6412871A (en) * | 1963-11-12 | 1965-05-13 | ||
NL7003233A (en) * | 1970-03-06 | 1971-09-08 | ||
US4021180A (en) * | 1974-12-20 | 1977-05-03 | Standard Oil Company (Indiana) | Collapsible core |
-
1977
- 1977-10-27 NL NL7711796A patent/NL188626C/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR978063A (en) * | 1948-11-15 | 1951-04-09 | Advanced mold for the manufacture of hollow objects by injection of thermoplastic materials | |
NL6412871A (en) * | 1963-11-12 | 1965-05-13 | ||
NL7003233A (en) * | 1970-03-06 | 1971-09-08 | ||
US4021180A (en) * | 1974-12-20 | 1977-05-03 | Standard Oil Company (Indiana) | Collapsible core |
Also Published As
Publication number | Publication date |
---|---|
NL188626B (en) | 1992-03-16 |
NL188626C (en) | 1992-08-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BA | A request for search or an international-type search has been filed | ||
A85 | Still pending on 85-01-01 | ||
BB | A search report has been drawn up | ||
BC | A request for examination has been filed | ||
V1 | Lapsed because of non-payment of the annual fee |