US3788793A - Apparatus for manufacturing concrete pipes, particularly shaft rings - Google Patents

Apparatus for manufacturing concrete pipes, particularly shaft rings Download PDF

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Publication number
US3788793A
US3788793A US00170743A US3788793DA US3788793A US 3788793 A US3788793 A US 3788793A US 00170743 A US00170743 A US 00170743A US 3788793D A US3788793D A US 3788793DA US 3788793 A US3788793 A US 3788793A
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Prior art keywords
core
plunger
mantle
accordance
latch
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Expired - Lifetime
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US00170743A
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English (en)
Inventor
R Pappers
G Hohberg
K John
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Knauer Maschinenfabrik GmbH
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Knauer Maschinenfabrik GmbH
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    • 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
    • B28B21/06—Methods or machines specially adapted for the production of tubular articles by casting into moulds into moulds having sliding parts

Definitions

  • the invention relates to the production of concrete pipes for use in lining shafts or the like. More particularly the invention provides a method and apparatus for producing concrete pipes, particularly shaft rings or lining, with or without holes for climbing irons by means of movable or stationary concrete casting machines.
  • an existing mold height is to be used of only a few millimeters to zero, which after one or several pre-fillings and compacting permits the final filling quantity up to the border of the form, and by sinking a stamp or column having a top socket profile makes it possible to achieve safe end compacting of the shaft ring until the predetermined height is attained, without it becoming necessary to further fill in concrete or even remove a part of the mass filled in.
  • the invention provides a method for producing concrete pipes, particularly shaft rings, primarily by means of floor production where the concrete is filled in between the form mantle and a core, is compacted, and then the forms are withdrawn from the work piece; and essentially this method is characterized in that the form mantle and form core are placed together on the forming location while coupled to one another, are uncoupled prior to the filling and compacting of the concrete after the forming, are anew coupled together after the forming, and then are withdrawn together from the completed product.
  • the method in accordance with the invention can preferably be carried out in that the form mantle and form core are coupled and uncoupled depending on the momentary phase of operation (position of thrust) of a plunger that is movable between the form mantle and the core.
  • the invention may furthermore be improved in that the form mantle and the core are placed together upon socket rings that are laid out and aligned in a row.
  • the socket rings are aligned as to location and space prior to the placing of the form mantle and cores.
  • Such a concrete production machine is suitably equipped with a plunger that can be introduced in the annular space between the form mantle and the core, which in accordance with the invention is provided with couplings for the temporary connection of form mantle and core.
  • Plunger and form mantle are advantageously equipped with an independent thrust drive.
  • the working station for filling in the concrete is on the one hand defined by a top cover of the core and, on the other hand, by a flange-like extension of the form mantle, both of which are disposed in the same plane.
  • cover plate in this connection' is provided with a centrol aperture that can be closed, and the plunger has a central guiding column which can drive into this opening and in which the latching of core and form mantle takes place.
  • one or more latch supports can be centered on the guiding column, which by means of a latch plate engage the central opening of the cover of the core where they can be latched.
  • the fundamentally simultaneous placing and raising in accordance with the invention of the core and form mantle can be made possible either in that the free ends of the latch supports loosely rest upon the working station that can be raised and lowered.
  • FIG. 1 is a plan view of the base frame of a concrete element producing device with a socket centering arrangement at the beginning of a production cycle
  • FIG. 2 is a sectional view of the form, plunger and filling box during a production cycle
  • FIG. 3 to which the description refers is a sectional view of the form mantle, core and plunger during a production cycle
  • FIG. 4 is a top view of the form mantle with table in the frame of the machine, core, latch support and plunger section, penetration of the latching noses into the core,
  • FIG. 5 shows the form mantle, core and plunger in section during a finishing operation
  • FIG. 6 shows the variable heightlatching at the final compression
  • FIG. 7 like FIG. 4, form mantle
  • FIG. 8 shows the form mantle, core and plunger in section during a finishingoperation.
  • FIG. 1 the side members 1 and 2 of the base frame of a known floor type forming device, which is not illustrated in detaiL-are shown.
  • the bottom sockets 3 are placed on the floor over which the floor type forming device rides.
  • the front traverse of the forming device which cannot be seen is enlarged in a manner that the bottom sockets 3 can freely pass.
  • the forming device is now instructed to move on to the next production location by means of a driving device 117.
  • the switching command Driving device in is coupled with the command Centering arms 4 and 4 move out. This command is carried out in such a manner by means of the delaying relay that the centering arms which in position of rest lie against the side portions of the frame move out only after leaving the zone of the finished pipe. They then constitute tangents of the socket circle and conduct the bottom socket 3 as a unit to the next production cycle and exactly underneath the center of the form.
  • the operator drives the forming device so far until both centering arms make visible contact with the border of the socket.
  • the centering arms 4 and 4 are rotatably journalled in the stationary points 5 and 5.
  • the pistons 7 and 7 of the hydraulic cylinders 8 and 8' engage the outer link points 6 and 6' of the centering arms.
  • the cylinders 8 and 8 are pivotally supported in the stationary arms 9 and 9' at the points 10 and 10. It is the task of the springs 11 and 11' that are secured to the centering arms 4 and 4 as well as to the arms 9, 9' to pull back the centering arms securely into their initial position after the hydraulic pressure has been released.
  • the command Centering arms move in is simultaneously given with the command Form down.
  • the supports 12 and 12' with the bolts 13, 13' serve as final abutments for the centering arms. They must be adjustably constructed to serve different purposes of the arrangement.
  • Connecting bars 14 and 14' that are pivotally linked thereto lead from the centering arms 4 i and 4 to a second pair of centering arms 15 and 15', which swing out synchronously with the centering arms 4 and 4 and serve as pre-storage, in that they keep the bottom socket 3 at a certain safety spacing out of the working zone.
  • the centering arms 15 and 15' are linked to the points 16 and 16- and are rotatably journalled at the pivot points 17 and 17' of the stationary lugs 18 and 18.
  • the form mantle is identified by reference numeral 20. It is surrounded by reinforcing rings 21. At its upper edge the form table 22 is welded on as an outer flange. Table 22 is coupled with the raising frame 23 of the form production device (FIG. 4) to which are fastened hydraulically operated pulling columns 25. At the lower end the form mantle has a conical expansion at 76 which is intended to facilitate the central introduction of the form mantle over the bottom socket 3. At the lower end of the form mantle at least three rubber-metal elements are rigidly connected therewith at the circumference of the form so that there is a small projection with respect to the form end.
  • the bolt 27 is rigidly secured to the forming table 22.
  • the hydraulic actuating cylinder 28 is pivotally secured around this bolt by means of an eyelet 29.
  • the cylinder 28 loosely receives the collar bolt 31 in its eyelet 30 from the bottom so that it can move together with the plunger over the forming table.
  • Insertion plates 32 and 33 secure its initial position after operation.
  • the collar bolt is provided with a conical end 34 (FIG. 3).
  • the fork block 35 with pivot 36 is firmly secured on the form mantle.
  • Lever 37 is rotatably journalled in the pivot point 36 and is connected with the transverse plate 38 by way of which the cylinder 39 which is connected with the form mantle 20 is operated.
  • This rotary movement about point 36 is transposed by way of pivot point 40, coupling 41 and pivot point 42 into straight line movement onto the climbing iron bolt'43, which can be moved inwardly and outwardly through aperture 44 in the form mantle until it engages the core mantle.
  • the disk springs 46 that are disposed around the collar bolt 45 act against the pressure of the hydraulic cylinder 39.
  • one or more vibrators are fixedly mounted on the form mantle.
  • four vibrator units are equally distributed around the circumference, but they are disposed at different levels.
  • a vibrating or shaking unit comprises an electromotor 47 and an eccentric vibrator 48, which are connected with one another by way of V-belts 49 in a power transmitting manner.
  • the core pipe 50 is made with a slightly conical shape.
  • a cover plate 51 is welded into the core pipe and registers at its upper end with the upper border thereof and forms together with the flange portion the center part of the operating platform in the same plane.
  • the core pipe has conical expansion at its lower end 76 for easier insertion into the lower socket 3. It is seated on the bottom with several pointedly terminating transverse metal sheets 52 provided at its inner circumference. As a result the core is always safely seated on the bottom. Small impurities and stones are pushed aside. Furthermore, what is especially important to perform the operation, the transverse metal sheets secure the core against turning under the action of the vibration.
  • Abutment members 53 and 53' are firmly mounted below the cover plate 51. Rings 116 that are welded on stiffen the core.
  • the support block 54 is mounted below the cover plate 51.
  • the closure cover 55 is rotatably located in the support block 54. Its plate 57 closes the aperture 58 of the cover plate. At the forward end of the plate 57 a lug 59 is located which so limits the location of the plate 57 that it constitutes a plane surface with the cover plate 51.
  • the aperture in the cover plate is conically expanded toward the bottom in order to avoid the accumulation of any impurities.
  • a bolt 60 is received in the cover 55 onto the outer ends of which strong springs 61 are hooked, the other ends of which are hooked onto adjustable screws 62.
  • the adjustable screws 62 are adjustably retained on the angle iron 63 that is firmly connected with the core tube 50.
  • the springs must be sufficiently spaced from one another as to permit the passage of the cover plate 55 between them.
  • the charging carriage 64 travels by means of wheels 65 on the rails 66 that are securely fastened to the forming table 22.
  • the charging carriage is pulled over the form and the core by means of hydraulic drive means that engage coupling 67.
  • a distributing shovel 69 is mounted for movement about pivot point 68.
  • the shape of the distributing shovel is adapted to the special requirements as illustrated.
  • the shovel In plan view the shovel is arcuately shaped so that there is a large distribution of concrete towards the side in order to amply fill the laterally disposed larger areas of a ring with concrete.
  • a counter weight 70 is mounted in one corner of the distributer shovel.
  • the plunger 71 comprises the plunger tube 72, which is provided at its circumference with a plurality, preferably three, longitudinal slots 73 having transverse slots 74, the cover plate 75 and the hard chromium plated top socket or sleeve ring 76.
  • the cover plate 75 with the entire plunger 71 is rotatably journalled relative to the plunger yoke plate 78 by means of an oblique double ball bearing 77.
  • Plunger yoke plate 78 is drawn up by means of screws 79 against the plunger yoke 80 by way of plate 81.
  • the pull columns 82 and 82' of the plunger are firmly connected with the plunger yoke.
  • the oblique double ball bearing 77 is held on the cover plate by means of covers 83 and 84. It supports the plunger radially and axially.
  • the journal 86 which is firmly connected with the hard chromium plated guiding column is braced in with cover 84 and plunger yoke plate 78.
  • the guiding column 85 is provided at its lower end with a cap-shaped closure member 87.
  • the rectangular mounting member 88 firmly secured to the plunger yoke plate 78 supports the gear motor 89.
  • a casing 90 having a T groove that slidably receives a stud 91 is disposed on the output shaft of the gear motor.
  • the stud 91 is rotatably journalled in the arm 92.
  • Arm 92 is rotatably journalled on the stud 93 which is rigidly connected with plunger 71.
  • the plunger 71 can be caused to effect a rocking move ment in accordance with the eccentric disposition of stud 91 in the T-groove of the casing 90.
  • a latch support 94 is guided in wear resistant sleeves 95 in the guiding column 85.
  • the latch carrier or support 94 is a threearmed carrier as indicated in FIGS. 3 and 4.
  • the latch plate 97 that has lugs 96 is firmly connected with the latch carrier 94.
  • Support members 98 are securely mounted to the outer ends of the arms of the latch supports, whereby the arms of the latch supports support themselves on the surface of the work table 22 as the lifting cylinders 25 are operated.
  • the latching eyelet 99 is secured to one of the arms.
  • the finished formed element 100 is illustrated in FIG. 2.
  • the pulling bars 82 and 82 together with yoke 80, yoke plate 78 and sus pended plunger 71, are guided in the bearings 101 and 101' of the machine frame 102 and are actuated by way of piston 103 of the hydraulic cylinder 104.
  • the pulling bars are synchronized in a force transmitting manner by way of a bell member 105 having arms 106 and 106'.
  • Stable arms 107 and 107' are firmly mounted on cylinder 104. They also guide the pulling columns 82 and 82.
  • Hydraulic cylinders 109 and 109' are supported at pivot joints 108 and 108' on arms 107 and 107'.
  • the piston rods 110 and 110' operate the latching bolts 112 and 112' by way of pivots 111 and 111 that are guided in the bearings 113 and 113- that are moved by arms 107 and 107.
  • the latching bolts 112 and 112' present key surfaces 114 and 114' at their free ends.
  • Key or wedge members 115 and 115 are rigidly mounted on the bell element 105.
  • the form mantle 20 is seated with the rubber metal elements 26 on the ground (FIG. 3) so that smaller unevennesses of the floor are absorbed by these elements and the mold stands correctly on the ground with three supports.
  • the form core 50 centers also with a conical inlet at the lower end in the inner diameter of the bottom socket 3 while it stands on the floor with at least three transverse blades 52 which are pointed at the lower end and distributed around its inner circumference. This arrangement is of essential significance.
  • the transverse blades 52 also solve the problem of securing the core 50 against turning and shifting as the vibrators are turned on. For that reason they were intentionally placed radially with respect to the form center.
  • the core closing lid 55 is drawn up by springs 61 so that the core cover plate 51 constitutes a closed plane surface.
  • the form mantle and form core After the form mantle and form core have been lowered they are released from the latching by operation of the hydraulic actuating cylinder 28, in that as the latch supports 94 when turned push the lugs 96 of the latch plate 97 under the corresponding recesses of the core cover plate 51 (FIG. 4).
  • the bayonet lock formed by the lugs 96 of the latch plate 97 andthe lower side of the core cover plate 51 is thus released.
  • the plunger 71 with the latch support 94 is pulled up hydraulically and thus frees the passage from filling carriages 64 on the working platform 51, 22 (FIG. 3).
  • the climbing iron bolts 43 are now introduced in the form by means of disk spring pressure after release of the hydraulic pressure.
  • the filling carriage 64 now fills the annular zone between form mantle and core with concrete 'during repeated to and fro travel.
  • the vibrators 48 are actuated for the intensive pre-compacting.
  • the pre-compacting is interrupted when the filling carriage 64 drives out of the forming area in order to haul material from the storage silo.
  • the'interruption can be effected simultaneously with the climbing iron operations, in that the upper climbing iron withdraws from the annular zone as the form is partially filled, while the lower one is already in the volume of material and remains in place. This is done in order to introduce armoring rings of steel wire.
  • the form After pre-vibrating once or several times, the form is filled, except for a small remaining space. This is subsequently filled from the filling carriage so that the form is filled to the brim up to the plane of the table.
  • the piston rods 118 of the cylinders 120 that are on the frame of the machine are lowered onto the plunger yoke plate 121 so that the upper sleeve 122 rests against the work piece 100 under a pressure that still permits unimpeded vibrations of the plunger 71.
  • This operation depends on the set up vibration time and on the speed of the plunger and thus is constant, as compared to a control of the plunger 71 that depends on a path of travel, where the compacting is only terminated after covering a predetermined path depending on the filled-in quantity of material which under certain conditions results in considerable time consumption due to the lengthening of the time of the operating cycles.
  • the form mantle and core are introduced by means of the hydraulic cylinder 28, into whose collar bolt 31 the eyelet of the latch carrier 94 enters by means of latch carrier 94 and latch plate 97, in that the lugs 96 slide against the corre sponding limiting members of the core cover plate.
  • the plunger is latched by actuating the hydraulic cylinders 109 and 109" on the latching bolts 112 and 112" against the frame of the machine and thus also against the form pressure, while form mantle 20 and core 50 move upward.
  • This-latching is independent of the thrust position of the plunger and of the height of the work piece formed in that the computed tolerance that is permitted by the standards is utilized (for example, with shaft rings 1,000 d; X 500,- 6mm). In this manner very favorable cycle timing is accomplished.
  • a preferred embodiment of a variable plunger latching means is the moving of the wedge or key surfaces 114 and 114" against the key members 115 and 115" against the bell 105, as shown in FIG. 6.
  • the climbing iron bolts 43 Prior to turning the switching to Open Form, the climbing iron bolts 43 are, of course, withdrawn.
  • the form mantle 20 is pulled up by a hydraulic cylinder, which is not shown, by way of the raising frame 23 and the pulling columns 25 (FIG. 4).
  • the form mantle 20 is pulled up by a certain amount beforethe latch plate 97 comesinto engagement below the core cover plate 51 and takes along the-core 50 by way of the core cover plate 94 (FIG. 5).
  • the core 50 is made with a slightly conical shape.
  • Form mantle 20 and core 50 are first raised so high that they are with their-lower edge safely above the upper edge of the formed piece, as indicated in FIG. 8.
  • the plunger 71 is unlatched from the machine frame and is raised up from the form by such an amount that the upper socket contour of the plunger moves out of the formed piece (FIG. 2).
  • the upper socket of the plunger has again imparted to it vibrations in order to smoothen the surface of the form being cast during release and to leave without doing damage.
  • All functions described may be controlled manually, as also by means of generally known electrical elements, not described here, that are combined into a fully automatic working operation.
  • An essential and characterizing feature of the method in accordance with the invention resides in that during the phase of the filling carriage entrance there is no connection between the form mantle and core, and the plane of the filling zone is free of any construction elements, especially receptacle devices for connections.
  • Apparatus for producing concrete pipes, particularly shaft rings comprising, in combination, a form constituted by a form mantle and a form core defining an annular space therebetween for receiving concrete being poured, a plunger movable into said annular space, said form mantle, form core and plunger being vertically movable, means for coupling said form mantle and said form core, and means for seating said form mantle and form core together at the forming place, means for uncoupling said form mantle and form core prior to pouring concrete into said annular space and for coupling said form mantle and form core again after pouring and compacting the concrete in said annular space, and means for withdrawing form mantle and form core together from the formed workpiece, a top cover for said form core defining a platform for pouring concrete, and an extension at the top end of said form mantle defining a flange, said plunger having a central guiding column and said top cover having a central aperture adapted to receive said guiding column, said guiding
  • Apparatus in accordance with claim 1 comprising at least one latch carrier pivotally mounted centrally of said guiding column of said plunger, said core cover having a central aperture, a latch plate in said aperture presenting a lug for engagement with a latch on said one said latch carrier.
  • Apparatus in accordance with claim 4 including an actuating cylinder pivotally mounted on said operating platform and pivotally connected to the end of one said latch carrier for turning said latch carrier.
  • Apparatus in accordance with claim 2 comprising a spring biased cover having lugs disposed below said central aperture of said core cover.
  • Apparatus in accordance with claim 7 including a biasing spring for said core cover having a fixed support at one end, said cover being pivotally supported proximate said central aperture and having engagement with said guiding column and having a lever arm in engagement with the other end of said spring.
  • Apparatus in accordance with claim 1 including plunger latching means and means for adjusting the height of said plunger in relation to time.

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  • 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)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
US00170743A 1970-08-24 1971-08-11 Apparatus for manufacturing concrete pipes, particularly shaft rings Expired - Lifetime US3788793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2041947 1970-08-24

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US3788793A true US3788793A (en) 1974-01-29

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US00170743A Expired - Lifetime US3788793A (en) 1970-08-24 1971-08-11 Apparatus for manufacturing concrete pipes, particularly shaft rings

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US (1) US3788793A (enrdf_load_stackoverflow)
CA (1) CA960841A (enrdf_load_stackoverflow)
DE (1) DE2041947B1 (enrdf_load_stackoverflow)
FR (1) FR2105934A5 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104908158A (zh) * 2014-03-12 2015-09-16 扬州市华光双瑞实业有限公司 一种径向挤压成型工艺混凝土管模具

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US450583A (en) * 1891-04-14 Machine for making sewer-pipe
US1862709A (en) * 1930-03-24 1932-06-14 Zeidler Concrete Products Mach Machine for constructing concrete pipe
US1961981A (en) * 1930-10-21 1934-06-05 Pechstadt Herbert Machine for molding pipes and other hollow articles
US2527717A (en) * 1949-09-06 1950-10-31 Fry Elwood Apparatus for molding concrete septic tanks
US2870513A (en) * 1955-04-28 1959-01-27 Archie R Gagne Pipe making apparatus
US3078539A (en) * 1960-02-01 1963-02-26 Cie Miron Ltee Concrete pipe moulding apparatus
US3119165A (en) * 1961-03-20 1964-01-28 Boise Cascade Corp Automatic concrete pipe molding machine for belled pipe
US3201843A (en) * 1963-08-13 1965-08-24 Price Brothers Co Concrete pipe molding machine
US3383742A (en) * 1964-11-30 1968-05-21 Beloit Corp Machine for making concrete pipes

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US450583A (en) * 1891-04-14 Machine for making sewer-pipe
US1862709A (en) * 1930-03-24 1932-06-14 Zeidler Concrete Products Mach Machine for constructing concrete pipe
US1961981A (en) * 1930-10-21 1934-06-05 Pechstadt Herbert Machine for molding pipes and other hollow articles
US2527717A (en) * 1949-09-06 1950-10-31 Fry Elwood Apparatus for molding concrete septic tanks
US2870513A (en) * 1955-04-28 1959-01-27 Archie R Gagne Pipe making apparatus
US3078539A (en) * 1960-02-01 1963-02-26 Cie Miron Ltee Concrete pipe moulding apparatus
US3119165A (en) * 1961-03-20 1964-01-28 Boise Cascade Corp Automatic concrete pipe molding machine for belled pipe
US3201843A (en) * 1963-08-13 1965-08-24 Price Brothers Co Concrete pipe molding machine
US3383742A (en) * 1964-11-30 1968-05-21 Beloit Corp Machine for making concrete pipes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104908158A (zh) * 2014-03-12 2015-09-16 扬州市华光双瑞实业有限公司 一种径向挤压成型工艺混凝土管模具
CN104908158B (zh) * 2014-03-12 2017-08-01 扬州市华光双瑞实业有限公司 一种径向挤压成型工艺混凝土管模具

Also Published As

Publication number Publication date
DE2041947C2 (enrdf_load_stackoverflow) 1975-05-07
CA960841A (en) 1975-01-14
FR2105934A5 (enrdf_load_stackoverflow) 1972-04-28
DE2041947B1 (de) 1972-03-09

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