EP0670763A1 - Verfahren und vorrichtung zur herstellung von betonrohren gleichmässiger höhe - Google Patents
Verfahren und vorrichtung zur herstellung von betonrohren gleichmässiger höheInfo
- Publication number
- EP0670763A1 EP0670763A1 EP94929501A EP94929501A EP0670763A1 EP 0670763 A1 EP0670763 A1 EP 0670763A1 EP 94929501 A EP94929501 A EP 94929501A EP 94929501 A EP94929501 A EP 94929501A EP 0670763 A1 EP0670763 A1 EP 0670763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- core
- impeller
- press ram
- pipe
- 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.)
- Withdrawn
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
- B28B7/0058—Moulds, cores or mandrels with provisions concerning the elimination of superfluous material; Moulds with burr-removing means provided therein or carried thereby
-
- 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
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
- B28B21/24—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like
- B28B21/26—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like with a packer head serving as a sliding mould or provided with guiding means for feeding the material
Definitions
- the invention relates to a method and a device for the production of concrete pipes of uniform height with a core, an outer jacket and a press die, the core being displaceable coaxially within the outer jacket and forming an annular space with the outer jacket for forming a concrete pipe.
- a fundamental innovation of the method according to the invention is that an impeller which operates the concrete filling and which is attached to the upper part of the core creates a free space for receiving the excess concrete without impairing the quality of the concrete pipe produced and without contaminating machine parts.
- an impeller for distributing the concrete is attached to the upper part of the mandrel, which is shaped in such a way that the filled concrete is distributed not only radially but also in height in order to completely fill the pipe casting mold at the pipe end to ensure before starting with the final compression, with which the final height is specified.
- REPLACEMENT BLA ⁇ (RULE 26) A uniform pipe height is achieved in that the predetermined height is already loaded with the concrete to be compressed when the press ram is lowered to this height.
- the main aim of the present invention is to provide a method and a device for producing concrete pipes with uniform technical properties and always uniform height, the excess concrete required not adversely affecting the quality of the pipes produced.
- Another object of the present invention is to catch the excess concrete and reuse it when pouring the next pipe.
- the present invention is intended to eliminate the stoppages which are caused by the unavoidable excess of concrete or by the cleaning of the contaminants associated therewith.
- the collecting space created by the impeller for the excess concrete can, for example, have the shape of an annular groove arranged near the core edge by suitable shaping of the impeller.
- An advantageous further development of the solution according to the invention is to provide the press ram with wipers so that the excess concrete which settles on the press ram can be stripped off the press ram and used for the casting of the next concrete pipe.
- Fig. 1 is a side view of a portion of an axially sectioned mold for concrete pipes, in which an impeller for horizontal distribution of the concrete is installed, which are provided with outer scraper plates which ensure the formation of a gutter or drainage groove to absorb the excess concrete;
- FIG. 2 shows a top view of the casting mold according to FIG. 1;
- Fig. 3 is a side view of a portion of an axially cut mold shown in Figure 1 during the manufacturing phase, in which the excess concrete is pressed by the press ram into the groove previously formed by the impeller.
- FIG. 4 shows a side view of a partial area of a cut mold for concrete pipes, in which an impeller for the radial distribution of the concrete is installed, which also distributes the concrete over its own working surface, so that the press ram has a sufficient amount of concrete to be pressed finds before it reaches bottom dead center;
- FIG. 5 shows a top view of the casting mold according to FIG. 4;
- FIG 6 is a side view of a portion of the axially cut mold shown in FIG 4 during the operation of the press ram to form the upper tube edge.
- FIG. 7 shows a side view of a structure for the press ram in axial section with a pair of wipers for bringing together and recovering the excess concrete that accumulates when pouring concrete pipes;
- Fig. 8 is a plan view along the section line II - II according to FIG. 7, wherein one stripper is cut and the other stripper is shown in a top view;
- Fig. 9 is a side view of the upper part of the mold for concrete pipes along the cutting line
- Fig. 10 is a side view of the upper part of the mold according to FIG. 9, with the press ram in its fixed lowest position, and
- 11 is a partially sectioned side view of the mold in the position in which the core and the press ram with the structure are in their respective starting positions.
- the method according to the invention can be carried out both with an impeller 7, which forms an annular collecting space on the outer edge of the core head 3 for receiving the excess concrete, and with an impeller 7 ', in the center of which the excess concrete can be accommodated.
- a mold for concrete pipes which has a cylindrical core 1 and an outer jacket 2, in which the core 1 is arranged coaxially.
- the core 1 is provided with a core head 3 with a reduced diameter, which carries and guides a drive shaft 4.
- the core head 3 is connected to the cylindrical part of the core 1 via an annular disk 5 connected, which preferably sinks inwards and is provided with a bead 6 in the embodiment shown here.
- the illustrated mold also has a press die 11 which is provided with a cylindrical guide 12 which forms a cavity 13.
- the press ram is designed so that it gives the tube T to be shaped the desired strength and gives the tube end or the tube edge the desired shape.
- the method according to the invention comprises the following operations:
- the outer jacket 2 is firmly connected to a work surface, while the core 1 is flush with a lower mold surface, not shown, of the mold.
- the concrete is fed into the mold from above using conventional means, so that it falls on the impeller 7 arranged above the core head 3.
- the rotation of the impeller 7 and the gradual upward movement of the core 1 also begin, so that the supplied concrete is thrown against the inner wall of the outer casing 2.
- the concrete pipe T is continuously shaped with the upward movement and the vibration of the core 1 up to its upper edge.
- the core 1 comes near the top of the part to be molded Concrete pipe T, the concrete supply is stopped.
- the vane wheel 7 continues to rotate about its axis in this phase, so that it distributes the material still present on it with the blades 9 and exposes an annular channel freed from the concrete conglomerate with the outer scraper plates 10.
- the impeller 7 is now stopped and the press ram 11 is lowered, which compresses the concrete supplied by the impeller 7 into the annular space delimited by the core 1 and the outer casing 2. It can be seen that the press ram 11 displaces the excess amount of concrete C which is not required or required for the production of a concrete tube via the edge bead 6. There, however, the ring-shaped channel has previously been exposed by the scraper plates 10 of the impeller 7, so that the excess concrete C is pressed by the press ram 11 via the bead 6 into the area above the ring disk 5.
- the core 1 lowers together with the impeller 7 and the excess material C collected on the top of the core without this material being deposited on the inner surface of the tube.
- the concrete supply is restarted for the production of the next concrete pipe and the impeller 7 is set in rotation again, the previously collected excess material C being reused together with the new material for casting a new pipe so that no material is lost.
- the device shown in FIGS. 4 to 6 has a core 1 and an outer jacket 2 arranged coaxially therewith, which enable the formation of pipes from vibro-compacted concrete in a manner known per se.
- the core 1 has a flat or slightly concave core head 3 with a through hole for receiving and supporting a shaft 4.
- the shaft 4 rotates the impeller 7 ', on the arms of which blades 9 are attached.
- the core 1 is preferably provided with an oblique bead 6 on the outer edge of its core head 3. In order to collect the concrete by the vibration of the core 1 in the center of the core head 3, this is slightly recessed.
- the method according to the invention comprises the following steps:
- the core 1 with the impeller 7 ' is located at the lower end of the mold, the impeller 7' being set in rotation.
- the core 1 is gradually raised so that the concrete, which has meanwhile been poured into the casting mold, is distributed by the impeller 7 ' becomes. In a manner known per se, almost the entire tube is shaped.
- the concrete is also distributed over the rotating surface. As shown in FIG. 4, a sufficient amount of material is obtained in the vicinity of the press ram 11 already in the phase when the latter is still in the upper starting position and the core 1 has not yet reached its maximum height.
- the core 1 is stopped shortly before it has reached the highest position and the rotation of the impeller 7 'is stopped, a metered amount of concrete D being fed in even further. As shown in FIG. 4, this metered amount of concrete D accumulates on the core head 3 due to the vibration of the core 1. Then the supply of concrete D is stopped and the ram 11 is lowered to a set height which corresponds to the desired height of the concrete pipe to be produced.
- the core 1 is raised to the upper end position and the impeller 7 'is rotated again.
- the material collected in the center of the impeller 7 ' is thus thrown partly into the end region of the tube to be formed and partly onto the inner wall of the guide 12 of the press ram 11.
- the distribution of the material D collected on the core head 3 of the core 1, whether in the final phase described above or in the normal casting phase, is facilitated by the use of at least one scraper 14 which is attached to one of the arms of the impeller 7 ' .
- the impeller 7 ' is stopped as soon as the ram 11 reaches its bottom dead center and the core 1 reaches its top position.
- the core 1 is moved into its starting position, while the press ram 11 is raised with the outer jacket 2 upwards.
- the concrete previously thrown from the impeller 7 'into the cavity 13 against the wall 12 of the ram 11 is released.
- the excess concrete falling from the wall 12 is absorbed by the bead 6 and guided by the vibration of the core 1 into the center of the concave core head 3.
- the excess concrete as a whole is collected in the center of the core head 3 and piled up to form a material cone D, so that deposits of concrete residues on the inner pipe wall and any contamination of the machine are avoided.
- the collected concrete is reused after the renewed commissioning of the impeller 7 'when casting the next pipe.
- the method described above can also be carried out using a differently designed impeller which has a similar construction to the impeller shown in FIGS. 3 to 6, but in which additional blades or outer plates or vanes of special design can be attached, through which an annular receiving space is created on the bead 6.
- Concrete residues are shown because the concrete tends to adhere to the press ram 11 and to come loose when the core 1 moves downward, so that concrete residues falling down can be deposited on the inner wall of the freshly formed pipe.
- the wipers 34 and 35 are preferably shaped in the form of a segment of a circle or bent and have at least one upper part which is provided with a reinforcement angle 36, 37.
- the strippers 34 and 35 are connected to the struts 30 via elastic connecting pieces 33.
- Brackets 38 are attached to the reinforcement brackets 36 and 37, which, together with brackets 39 and 40 attached in the opposite manner and firmly attached to the underside of the head plate 31, enable the assembly of oil-hydraulic cylinders 41 for each of the two wipers 34 and 35.
- the actuation of the hydraulic cylinders 41 leads to the fact that the wipers 34 and 35, which are pivotably attached to the elastic connecting pieces 33, change from a spread position to an approximated position.
- the structure A also has boundary plates 42 and 43, which are similar to the struts 30, but are arranged radially to the elastic connecting pieces 33 and stops 44 and 45 for limiting the maximum stroke of the wipers 34 actuated by the cylinders 41 and 35.
- FIGS. 9 to 11 show that the structure A according to FIGS. 7 and 8 can be built on the upper part of the casting mold shown in FIGS. 4 to 6, with the same ram 11 as previously described , while the upper drive part is built differently.
- the bead 6 of the core 1 can be simplified compared to the previously described embodiment in order to make it easier to push the material together.
- the structure A is built with the wipers 34 and 35 on the upper part of the outer casing 2 and actuated by means of a conventional shaft, which results in an axial movement and a mutual rotation of the ram 11 enables.
- Impeller 7 'stopped and the downward stroke of structure A initiated with the ram 11.
- the press ram 11 compresses the concrete during the downward stroke and presses the excess material onto the top of the core 1, where it is deposited.
- the downward movement of the structure A ends when the position determined for the desired tube height is reached.
- the core 1 is again raised slightly to the level of the press ram 11, so that the casting of the tube T is ended and the excess material is separated from the concrete processed in the manufacture of the tube T.
- the impeller 7 ' is set in motion again while the core is raised somewhat, so that the excess material which has already accumulated on the edges of the core 1 against the inner walls of the strippers 34 and 35 and against the inner surface of the radial limit plates 42 and 43 is thrown.
- the material which is radially flung out in this way settles on the upper surface of the press ram 11, where it forms a circular crown C.
- the core 1 is in its lowest position.
- the outer jacket 2 can then be lowered to start pouring the next pipe, while the structure A is left in its raised position to allow the passage of the conveyor belt for the supply of the new concrete material required for the production of the next pipe ⁇ lichen. This situation is shown in FIG. 11.
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)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBL930023 | 1993-09-30 | ||
IT93BL000023A IT1265633B1 (it) | 1993-09-30 | 1993-09-30 | Metodo di realizzazione di tubi in cemento ad altezza uniforme |
ITBL940024 | 1994-09-06 | ||
ITBL940024A IT1270277B (it) | 1994-09-06 | 1994-09-06 | Perfezionamento al metodo di realizzazione di tubi in cemento ad altezza uniforme |
PCT/EP1994/003247 WO1995009073A1 (de) | 1993-09-30 | 1994-09-30 | Verfahren und vorrichtung zur herstellung von betonrohren gleichmässiger höhe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0670763A1 true EP0670763A1 (de) | 1995-09-13 |
Family
ID=26330249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94929501A Withdrawn EP0670763A1 (de) | 1993-09-30 | 1994-09-30 | Verfahren und vorrichtung zur herstellung von betonrohren gleichmässiger höhe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0670763A1 (de) |
WO (1) | WO1995009073A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT517916A1 (de) * | 2015-10-16 | 2017-05-15 | Ulrich Schlüsselbauer | Verfahren zum Herstellen von Betonrohren |
CN110385777B (zh) * | 2019-06-25 | 2021-05-11 | 广州德亚机械制造有限公司 | 一种管模喂料系统 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3276091A (en) * | 1964-04-20 | 1966-10-04 | Charles B Pausch | Roller head for cement pipe forming |
US3551968A (en) * | 1968-03-01 | 1971-01-05 | Hydrotile Machinery Co | Feeding device for concrete pipe machine |
DE2513032A1 (de) * | 1975-03-25 | 1976-10-07 | Omag Maschinenbau Ag | Vorrichtung zum verdichten von beton oder aehnlichen massen zur herstellung von hohlkoerpern, vorzugsweise rohren, exakter laenge |
DE4029480A1 (de) * | 1990-09-17 | 1992-03-19 | Prinzing Georg Gmbh Co Kg | Verfahren zum herstellen von betonteilen |
-
1994
- 1994-09-30 WO PCT/EP1994/003247 patent/WO1995009073A1/de not_active Application Discontinuation
- 1994-09-30 EP EP94929501A patent/EP0670763A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9509073A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995009073A1 (de) | 1995-04-06 |
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