GB1307518A - Mandrels - Google Patents
MandrelsInfo
- Publication number
- GB1307518A GB1307518A GB1307518DA GB1307518A GB 1307518 A GB1307518 A GB 1307518A GB 1307518D A GB1307518D A GB 1307518DA GB 1307518 A GB1307518 A GB 1307518A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- slave
- shaft
- movement
- mandrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
- B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
Abstract
1307518 Collapsible mandrels ROCKINGHAM DESIGN & DEVELOPMENT CO Ltd B J WESTON K E DRAKE and C T TURNER 5 March 1970 [5 March 1969] 11756/69 Heading B5A A mandrel for use in casting comprises a body member and a plurality of alternately disposed working elements 2 and slave elements 3 reciprocatable between an expanded position (Fig. 2, not shown) in which all the elements from part of the mandrel surface proud of the body surface and a withdrawn position in which only the slave element surfaces and the body surface form the mandrel surface (see Fig. 7), movement of the working elements resulting in movement of the slave elements to corresponding positions through interacting surfaces on adjacent elements. A shaft 4 having cam surfaces 5 and 6 is movable in the body formed by parts 7, 8 and 9 linked by two sets of four bolts 22 and 8<SP>1</SP>. Cam surface 6 interacts with cam surfaces 33 on the working elements to move the latter and hence the slave elements 3 inwards, and surfaces 5 and 32 interact to move the elements 2 and 3 outwards as the shaft is moved. The elements are located in slots in the end of part 7. Shaft 4 carries a double pipe 19 to carry cooling liquid to channels 15 and 12 and form channel 16. The elements are arranged so that during radial movement there is no radial thrust on the surfaces (38 and 39) of adjacent elements which abut in the expanded position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1175669 | 1969-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1307518A true GB1307518A (en) | 1973-02-21 |
Family
ID=9992133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1307518D Expired GB1307518A (en) | 1969-03-05 | 1969-03-05 | Mandrels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1307518A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2278801A (en) * | 1993-06-04 | 1994-12-14 | Otte Ifw Ind Formen | Core for injection moulding |
-
1969
- 1969-03-05 GB GB1307518D patent/GB1307518A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2278801A (en) * | 1993-06-04 | 1994-12-14 | Otte Ifw Ind Formen | Core for injection moulding |
| GB2278801B (en) * | 1993-06-04 | 1996-10-09 | Otte Ifw Ind Formen | Injection molding mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |