GB629611A - Improvements in cores for the manufacture of pre-cast concrete units of hollow or channel-shaped section - Google Patents
Improvements in cores for the manufacture of pre-cast concrete units of hollow or channel-shaped sectionInfo
- Publication number
- GB629611A GB629611A GB2973746A GB2973746A GB629611A GB 629611 A GB629611 A GB 629611A GB 2973746 A GB2973746 A GB 2973746A GB 2973746 A GB2973746 A GB 2973746A GB 629611 A GB629611 A GB 629611A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- piece
- side members
- cores
- mould
- 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
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
629,611. Collapsable cores for moulding hollow concrete units. MATTHEWS & MUMBY, Ltd., and KEMPSHALL, H. A. Oct. 5, 1946, No. 29737. [Class 87 (ii)] A collapsable core comprises a longitudinal ridge or key-piece g of inverted T section, the sides of the stem of the T being tapered, and two side members c of approximately D shape, the upper portions of which are shaped to engage the tapered sides of the key-piece and the lower outer portions being radiused at d. Plates h secured to the arms of the T of the key-piece project upwardly to form channels in which engage downwardly projecting plates f attached to the upper side faces of the side members. To make a hollow block the core is erected on partially cured concrete b, cast in the bottom of a mould a, by supporting the key-piece g at its ends which project beyond the ends of the mould and then placing the side members in position. Concrete is then cast around the core and after setting the supports of the key-piece are removed whereupon the key-piece drops or may be pulled down to free the side members c which can then be pivoted at d and removed. Two cores end to end may be used for a long concrete unit, the adjacent ends of the key-pieces then being shaped to rest on the curved face of a semicylindrical block placed transversely in the centre of the mould. After removing the outer support of a key piece the outer end of the key piece is lowered and a short longitudinal movement releases it from the centre support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2973746A GB629611A (en) | 1946-10-05 | 1946-10-05 | Improvements in cores for the manufacture of pre-cast concrete units of hollow or channel-shaped section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2973746A GB629611A (en) | 1946-10-05 | 1946-10-05 | Improvements in cores for the manufacture of pre-cast concrete units of hollow or channel-shaped section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB629611A true GB629611A (en) | 1949-09-23 |
Family
ID=10296342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2973746A Expired GB629611A (en) | 1946-10-05 | 1946-10-05 | Improvements in cores for the manufacture of pre-cast concrete units of hollow or channel-shaped section |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB629611A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3222749A (en) * | 1963-01-25 | 1965-12-14 | Wilson E Haas | Building construction |
-
1946
- 1946-10-05 GB GB2973746A patent/GB629611A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3222749A (en) * | 1963-01-25 | 1965-12-14 | Wilson E Haas | Building construction |
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