CH89513A - Inner coating for rotary mold used in the manufacture of cement pipes by centrifugal force. - Google Patents
Inner coating for rotary mold used in the manufacture of cement pipes by centrifugal force.Info
- Publication number
- CH89513A CH89513A CH89513DA CH89513A CH 89513 A CH89513 A CH 89513A CH 89513D A CH89513D A CH 89513DA CH 89513 A CH89513 A CH 89513A
- Authority
- CH
- Switzerland
- Prior art keywords
- mold
- manufacture
- cement
- coating
- centrifugal force
- Prior art date
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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/76—Moulds
- B28B21/80—Moulds adapted to centrifugal or rotational moulding
-
- 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
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Lining And Supports For Tunnels (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
Revêtement intérieur pour moule rotatif servant à la fabrication de tuyaux en ciment par la force centrifuge. L'objet de l'invention est un revêtement intérieur pour moule rotatif servant à la fabrication de tuyaux en ciment par la force centrifuge, ce revêtement étant constitué par une matière élastique, non adhérente au ci ment, qui est placée contre la paroi intérieure du moule, de manière à le rendre étanche et à empêcher l'adhérence du ciment sur ces parois.
Le dessin annexé représente trois formes d'exécution de l'objet de l'invention.
La fig. 1 est une vue en bout d'une pre mière forme d'exécution; La fig. 2 est une vue en bout d'une deuxième forme d'exécution-, La fig. 3 est une section transversale de la troisième forme d'exécution ; La fig. 4 est une section transversale d'un moule dans lequel se trouve iin revêtement selon la fig. 1.
Dans la forme d'exécution représentée par la fig. 1, le revêtement est constitué par une feuille ca enroulée, dont les extrémités ont leurs faces en regard l'une de l'autre, en a". Dan, la forme d'exécution représentée par la fig. 2, le revêtement est constitué par nue feuille. a dont les deux extrémités<I>a',</I> paral lèles < t l'axe (lui moule, sont amincies.
Cette feuille est enroulée deux fois sur elle-même de manière à rie pas laisser de joint ouvert et à avoir une section transversale annulaire d'épaisseur sensiblement égale sur tout son pourtour. La feuille a pourrait être enroulée plus de deux fois sur elle-même.
Dans la forme d'exécution représentée par la fig. 3, le revêtement est constitué par un organe tubulaire b, dont la face extérieure s'applique contre la paroi intérieure du moule.
Par son introduction dans le moule, cet organe est légi#renrent comprimé, de manière à se séparer ensuite facilement de l'objet de fabrication, lorsque ce dernier est retiré du moule.
Dans ni) moule formé, par exemple de deux parties ainsi qu'il est représenté cri section transversale par la frg. 4, les deux parties<I>cl</I> et e sont séparées l'une de l'autre par deux joints r., sans inconvénient pour la fabrication, la feuille a étant disposée sur les parois intérieures du moule, de manière que son joint a" ne corresponde pas avec an des joints r du moule.
La matière constituant le revêtement intérieur du moule peut en particulier être constituée par du caoutchouc.
En utilisant un revêtement du moule se lon l'invention, on obtient des moules par faitement étanches et il n'est plus nécessaire de les graisser pour empêcher l'adhérence du ciment aux parois.
Inner coating for rotary mold used in the manufacture of cement pipes by centrifugal force. The object of the invention is an interior coating for a rotary mold used in the manufacture of cement pipes by centrifugal force, this coating being constituted by an elastic material, not adhering to the cement, which is placed against the interior wall of the cement. mold, so as to make it waterproof and to prevent the adhesion of the cement on these walls.
The appended drawing represents three embodiments of the object of the invention.
Fig. 1 is an end view of a first embodiment; Fig. 2 is an end view of a second embodiment, FIG. 3 is a cross section of the third embodiment; Fig. 4 is a cross section of a mold in which there is a coating according to FIG. 1.
In the embodiment shown in FIG. 1, the covering is formed by a wound sheet ca, the ends of which have their faces facing each other, at a ". Dan, the embodiment shown in FIG. 2, the covering is formed by bare leaf. a whose two ends <I> a ', </I> parallel <t the axis (molds it, are thinned.
This sheet is wound twice on itself so as not to leave a joint open and to have an annular cross section of substantially equal thickness over its entire periphery. Sheet a could be rolled up more than twice on itself.
In the embodiment shown in FIG. 3, the coating consists of a tubular member b, the outer face of which is applied against the inner wall of the mold.
By its introduction into the mold, this member is legi # renrent compressed, so as to then easily separate from the object of manufacture, when the latter is removed from the mold.
In ni) mold formed, for example of two parts as shown cry cross section by the frg. 4, the two parts <I> cl </I> and e are separated from each other by two joints r., Without inconvenience for the manufacture, the sheet a being arranged on the interior walls of the mold, so that its joint a "does not correspond with an of the joints r of the mold.
The material constituting the internal coating of the mold may in particular consist of rubber.
By using a coating of the mold according to the invention, molds are obtained which are completely waterproof and it is no longer necessary to lubricate them to prevent the adhesion of the cement to the walls.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR142121X | 1919-02-03 | ||
FR387745X | 1919-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH89513A true CH89513A (en) | 1921-06-01 |
Family
ID=34635409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH89513D CH89513A (en) | 1919-02-03 | 1920-02-02 | Inner coating for rotary mold used in the manufacture of cement pipes by centrifugal force. |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH89513A (en) |
DE (1) | DE387745C (en) |
GB (1) | GB142121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007445A1 (en) * | 1987-03-24 | 1988-10-06 | Skw Trostberg Aktiengesellschaft | Process for manufacturing concrete pipes with expanded joint formed by a so-called neck ring |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE952237C (en) * | 1951-02-06 | 1956-11-15 | Erik Johan Von Heidenstam | Method and device for the production of hollow bodies from concrete or the like with prestressed reinforcement by centrifugation |
-
1920
- 1920-02-02 CH CH89513D patent/CH89513A/en unknown
- 1920-03-13 DE DEC28876D patent/DE387745C/en not_active Expired
- 1920-04-21 GB GB11114/20A patent/GB142121A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007445A1 (en) * | 1987-03-24 | 1988-10-06 | Skw Trostberg Aktiengesellschaft | Process for manufacturing concrete pipes with expanded joint formed by a so-called neck ring |
Also Published As
Publication number | Publication date |
---|---|
GB142121A (en) | 1921-07-14 |
DE387745C (en) | 1924-01-05 |
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