GB1102063A - Apparatus for producing sheets and tubes of fibrous cement by winding a web of plastic mass of fibrous cement on to a sizing roll or a mandrel - Google Patents
Apparatus for producing sheets and tubes of fibrous cement by winding a web of plastic mass of fibrous cement on to a sizing roll or a mandrelInfo
- Publication number
- GB1102063A GB1102063A GB5738/65A GB573865A GB1102063A GB 1102063 A GB1102063 A GB 1102063A GB 5738/65 A GB5738/65 A GB 5738/65A GB 573865 A GB573865 A GB 573865A GB 1102063 A GB1102063 A GB 1102063A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mandrel
- motor
- driven
- breast roller
- cement
- 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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/42—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces
- B28B21/48—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces by wrapping, e.g. winding
-
- 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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
- B28B1/40—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by wrapping, e.g. winding
- B28B1/42—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by wrapping, e.g. winding using mixtures containing fibres, e.g. for making sheets by slitting the wound layer
-
- 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
- B28B21/42—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces
- B28B21/50—Details of compression or compacting means
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
1,102,063. Manufacturing cement pipes. K. A. OESTERHELD. 10 Feb., 1965 [19 Feb., 1964], No. 5738/65. Heading F2P. In apparatus for producing sheets and tubes of fibrous cement wherein a web of fibrous cement conveyed by an endless felt belt 11 is wound, compressed and dewatered on a vertically movable mandrel carried on pivoted arms 4, a breast roller 6 is driven at a constant but variable speed by a first motor (not shown) and the mandrel is directly driven by second hydraulic or electric motor, the driving torque of which varies automatically as the being- formed tube wall thickness increases. Said torque produces a thrust on the mass of cement at the nip between the mandrel and the breast roller which is less, equal to or greater than that thrust exerted by the breast roller. As illustrated, the mandrel is driven by a D.C. motor 24 through worm gearing 32, 34 and a belt drive 35, 36, the motor itself being driven at a speed proportional to the breast roller by a generator (20), Fig. 2 (not shown), of a Ward- Leonard system whose field is energized by the rectified voltage of a tacho-generator 18 driven through a belt 17 by the driving motor (not shown) of the breast roller. In operation, as the wall thickness of the being-formed tube grows, the mandrel motor speed is reduced by the frictional contact between the mandrel and the cement until the peripheral velocities of the mandrel and breast roller are the same. This reduction in speed reduces the back e.m.f. of the mandrel motor and induces a correspondingly increased mandrel motor-driving torque. In an alternative system, Figs. 5, 6 and 7 (not shown), the motor is driven by an hydraulic motor (37) fed by a motor-driven swash-plate type pump (53) whose volume output is controlled through valves (55) and (50) by a centrifugal governor (43) driven by the mandrel. As the mandrel speed is decreased by the frictional interference between it and the breast roller on increasing wall thickness of the being-formed tube, valves (50) and (55) are operated to reduce the volume of fluid directed to the motor (37) by the pump thereby reducing the torque applied to the mandrel. This permits the outer layers of the formed pipe to be applied with a relative higher tension than the inner so that the compressive effect on the outer layers on opening out the pipe into sheet form is counteracted. In a modification of the latter system, Figs. 7-8 (not shown) the governor is replaced by a cam and cam follower (62) and (48) respectively. In a further modification, Fig. 9 (not shown), the control valve (50) is replaced by a continuously-operated motor-driven pump (65) actuated by a time control clock (63) said clock being started by a limit switch (68) and being switched off by a preset michro-switch (69) when the being- formed tube is completed. The output of the pump continuously acts to progressively reduce the fluid supply the mandrel motor thereby progressively reducing the drive torque applied to the mandrel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO0009958 | 1964-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1102063A true GB1102063A (en) | 1968-02-07 |
Family
ID=7351825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5738/65A Expired GB1102063A (en) | 1964-02-19 | 1965-02-10 | Apparatus for producing sheets and tubes of fibrous cement by winding a web of plastic mass of fibrous cement on to a sizing roll or a mandrel |
Country Status (8)
Country | Link |
---|---|
US (1) | US3413191A (en) |
AT (1) | AT248935B (en) |
BE (1) | BE659728A (en) |
CH (1) | CH438132A (en) |
DK (1) | DK121648B (en) |
FR (1) | FR1428098A (en) |
GB (1) | GB1102063A (en) |
NL (1) | NL6502020A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU628990B2 (en) * | 1989-06-12 | 1992-09-24 | De Beers Industrial Diamond Division (Proprietary) Limited | Particle sorting |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT383792B (en) * | 1981-06-12 | 1987-08-25 | Sp K Bjuro Oboru Dlya Proizv A | DRIVE FOR MACHINES FOR SHAPING FIBER FABRICS |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3121659A (en) * | 1959-07-09 | 1964-02-18 | Amanzio Adalberto | Apparatus for producing fiber reinforced cementitious structure |
-
1965
- 1965-02-08 CH CH180165A patent/CH438132A/en unknown
- 1965-02-09 AT AT115265A patent/AT248935B/en active
- 1965-02-09 DK DK64165AA patent/DK121648B/en unknown
- 1965-02-10 GB GB5738/65A patent/GB1102063A/en not_active Expired
- 1965-02-11 FR FR5134A patent/FR1428098A/en not_active Expired
- 1965-02-15 BE BE659728D patent/BE659728A/xx unknown
- 1965-02-18 US US433760A patent/US3413191A/en not_active Expired - Lifetime
- 1965-02-18 NL NL6502020A patent/NL6502020A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU628990B2 (en) * | 1989-06-12 | 1992-09-24 | De Beers Industrial Diamond Division (Proprietary) Limited | Particle sorting |
Also Published As
Publication number | Publication date |
---|---|
CH438132A (en) | 1967-06-15 |
FR1428098A (en) | 1966-02-11 |
NL6502020A (en) | 1965-08-20 |
US3413191A (en) | 1968-11-26 |
AT248935B (en) | 1966-08-25 |
BE659728A (en) | 1965-05-28 |
DK121648B (en) | 1971-11-08 |
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