EP0911129A2 - Moule pour la fabrication d'articles pressés - Google Patents

Moule pour la fabrication d'articles pressés Download PDF

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Publication number
EP0911129A2
EP0911129A2 EP98111929A EP98111929A EP0911129A2 EP 0911129 A2 EP0911129 A2 EP 0911129A2 EP 98111929 A EP98111929 A EP 98111929A EP 98111929 A EP98111929 A EP 98111929A EP 0911129 A2 EP0911129 A2 EP 0911129A2
Authority
EP
European Patent Office
Prior art keywords
pressure
hydraulic
plate
joint
hydraulic cylinders
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Withdrawn
Application number
EP98111929A
Other languages
German (de)
English (en)
Other versions
EP0911129A3 (fr
Inventor
Rudolf Braungardt
Erwin Schmucker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobra Formen GmbH
Original Assignee
Kobra Formen und Anlagenbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobra Formen und Anlagenbau GmbH filed Critical Kobra Formen und Anlagenbau GmbH
Publication of EP0911129A2 publication Critical patent/EP0911129A2/fr
Publication of EP0911129A3 publication Critical patent/EP0911129A3/fr
Withdrawn legal-status Critical Current

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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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/021—Ram heads of special form
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
    • B28B3/06—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould with two or more ram and mould sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B30B15/067—Press rams with means for equalizing the pressure exerted by a plurality of press rams

Definitions

  • the invention relates to a mold for the production of Moldings, in particular concrete blocks made of flowable Concrete, with several mold chambers and one vertically movable Load plate that has hydraulic cylinders with vertical movable pressure plates assigned to the mold chambers is connected, the hydraulic cylinder by a common pressure source can be acted upon.
  • DE 296 03 783 U1 is a multi-chamber shape for mechanical production of molded concrete parts known between the load plate and the individual pressure plates a compressed air chamber is arranged. Are there all compressed air chambers with a common compressed air source connected. So during the compression process vertical movements of the printing plates relative to each other possible in order to achieve a uniform in all mold chambers To achieve compaction. After the compression process the pressure in the compressed air chambers is reduced so much that the pressure plates by spring force into a common upper one Be brought to the stop position. Then the Mold chambers are refilled with concrete and the pressure plates in a second compression stage through the load plates charged again. There is a vertical relative movement between the individual, at the same stop height Printing plates no longer possible, so that in the second compression stage a uniform height of the compacted Concrete is achieved in all mold chambers.
  • the invention is based, with relative simple and inexpensive means an even one Compaction and dimensional accuracy of the finished concrete blocks to reach.
  • the object is achieved in that the pressure source is a hydraulic accumulator and in the Hydraulic line from the accumulator to the hydraulic cylinders Shut-off valve is arranged.
  • the first compression phase is due to the vertical compliance of the Pressure plates against the boost pressure in the memory uniform compaction of the concrete mass in all molding chambers reached while in the second compression phase with the shut-off valve closed due to the intransigence of the pressure plates in all mold chambers, which are made with concrete mass were refilled, an equal amount of finished Concrete blocks is reached.
  • each printing plate assigned at least one hydraulic cylinder.
  • To achieve vertical movement compensation even within a To obtain the mold chamber is to use two hydraulic cylinders one swivel and one for each pressure plate Rotary-thrust joint between the hydraulic cylinders and the Pressure plate provided. This can, for example with an uneven filling height of the molding chamber Pressure plate by inclining the fill level adjust to ensure even compression of the To achieve concrete mass.
  • An advantageous construction of the articulation is characterized in that the axes of rotation of the swivel and the rotary push joint transverse to the longitudinal central axis of the Pressure plate run and the thrust axis of the rotary-thrust joint by extending in the direction of the longitudinal central axis Elongated holes of a horizontally movable bearing plate of the Rotary thrust joint is formed.
  • a advantageous construction of this joint is characterized in that the thrust axis of the first Ball-thrust joint through in the direction of the longitudinal central axis oblong holes of a horizontally movable bearing plate of the first ball-thrust joint is formed while the second ball-thrust joint is designed as a floating bearing which is within the limits of the enlarged through holes a horizontally movable bearing plate of the second ball-thrust joint horizontal in all directions can move.
  • the Storage with the hydraulic system of the molding machine a three-way valve connected.
  • the hydraulic line is to guarantee the compression level between the shut-off valve and the hydraulic cylinders and the supply lines to the hydraulic cylinders and the shut-off valve even integrated into the load plate.
  • the advantages achieved with the invention are in particular in that the memory of the invention simple way between hydraulic cylinder and Load plate in the hydraulic system of the molding machine integrates. This eliminates a second energy source.
  • the resilience of the printing plates during the first compression phase and its intransigence during the second compression phase is the inventive Storage and control unit in the hydraulic system the molding machine is integrated in the production process controlled so that the memory function an additional hydraulic or compressed air pump.
  • the high hydraulic Resilience of the memory also allows a relative small dimensioning of the hydraulic cylinders.
  • Fig. 1 shows a vertically movable driven Load plate 1 of a molding machine, not shown for the production of concrete blocks.
  • the load plate 1 On the bottom the load plate 1 is a plurality of pressure plates 2 arranged.
  • Each pressure plate 2 is a molding chamber 3 assigned to a form 4 open at the top and bottom.
  • Form 4 is on a mold board 5 of a vibrating table 6 of the molding machine discontinued.
  • Each pressure plate 2 is with the load plate 1 connected via two hydraulic cylinders 7, 7 'to the underside of the load plate 1 are attached.
  • Piston rod 8 of a piston 9 is with the pressure plate 2 connected by a hinge 10, the axis of rotation 11 horizontally and transversely to the longitudinal central axis 12 of the pressure plate 2 runs (Fig.
  • the swivel joint 10 has a bearing plate 13 on that with two dowel screws 14 on the top a reinforcing plate 15 of the pressure plate 2 is screwed on.
  • the reinforcing plate 15 is on the Screwed on top of the pressure plate 2.
  • the piston rod 8 of the second hydraulic cylinder 7 ' is connected to the pressure plate 2 via a rotary-push joint 16, whose horizontal axis of rotation 17 parallel to the axis of rotation 11 of the swivel joint 10 extends.
  • the thrust axis of the Rotary thrust joint 16 runs parallel to the longitudinal central axis 12 of the pressure plate 2 and is through two elongated holes 18 formed, which is in a bearing plate 19 of the rotary push joint 16 are located.
  • Each slot 18 is from a pass collar screw 20 which penetrates into the reinforcing plate 15 of the pressure plate 2 is screwed in so far, that the bearing plate 19 or the entire rotary-push joint 16 in the direction of the longitudinal central axis 12 of the pressure plate 2, delimited by the elongated holes 18, horizontally can move.
  • the swivel joint 10 thus enables together with the rotary push joint 16 also inclined positions of the pressure plate 2nd
  • the piston rods 8 'of the hydraulic cylinders 7 are via a ball joint 21 and two ball-thrust joints 22 connected to the pressure plate 2.
  • the ball joint 21, whose ball pivot with the end of the piston rod 8 ' is connected to the bearing plate 13 and two fitting screws 14 on the top of the reinforcing plate 15 a longitudinal axis 12 ′ parallel to the longitudinal central axis 12 screwed one side of the pressure plate 2.
  • the one the two ball-thrust joints 22 is also on the Longitudinal axis 12 'on the other side of the pressure plate 2 the reinforcing plate 15 with the help of the bearing plate 19 and the collar screws 20 screwed so that it is in the boundaries of the slots 18 horizontally in the direction of Longitudinal central axis 12 can move.
  • the second ball-thrust joint 22 is parallel to the longitudinal axis 12 'on the opposite Side with a bearing plate 23 and two Fitting collar screws 20 on the top of the reinforcement plate 15 attached in the form of a floating bearing.
  • All hydraulic cylinders 7, 7 ' are common Hydraulic line 25 with a hydraulic storage and Control unit 26 and with the hydraulic system 27 of the molding machine connected (Fig. 1). Between the storage and Control unit 26 and the one to the hydraulic cylinders 7, 7 ' leading hydraulic line 25 is a shut-off valve 28 arranged. The hydraulic line 25 and the feed lines the hydraulic cylinders 7, 7 'and the shut-off valve 28 are integrated in the load plate 1.
  • the storage and control unit 26 consists of a hydraulic accumulator 29 which is connected via the hydraulic line 25 and the shut-off valve 28 with the hydraulic cylinders 7, 7 ' is connected (Fig. 5). Another leads from memory 29 Hydraulic line 30 to a three-way valve 31, the a pressure line 32 with a pump 33 and via a Drain line 34 with a tank 35 of the hydraulic system 27 the molding machine is connected.
  • the three-way valve 31 has three switch positions 36, 37 and 38.
  • the switch position 36 means that the oil circulates without pressure. No oil flows from the pump 33 to the reservoir 29 and there can also be no oil flow from the reservoir 29 into the tank 35.
  • the switch position 36 corresponds to the normal operation of the system in which the oil between the accumulator 29 and the hydraulic cylinders 7, 7 'or the shut-off valve 28 is included.
  • Fig. 1 of the drawing the starting position is the Printing plates 2 shown before the first compression process.
  • the mold chambers 3 are filled with concrete mass.
  • the Shut-off valve 28 of the hydraulic line 25 is open and the three-way valve 31 is in the switching position 36 (Fig. 5). All pistons 9 of the hydraulic cylinders 7, 7 'are due to the boost pressure in the memory 29 down Stop extended.
  • the load plate 1 is lowered and the pressure plates 2 immerse in the mold chambers 3 and press on the filled concrete mass, which by the Vibrating movement of the vibrating table 6 is compressed. Since the Pressure plates 2 in the vertical direction against the boost pressure can yield in the memory 29 is in the mold chambers 3rd the concrete mass is compacted evenly.
  • the pressure force of the load plate 1 to compress the Concrete mass is in a known manner via the hydraulic system 27 of the molding machine changeable. This allows the Compressive force the different circumstances, such as e.g. Size of the concrete block, different consistency the concrete mass, volume of the concrete mass, surface size and geometric shape of the concrete block can be adjusted. Accordingly, the pressure in the hydraulic cylinders 7, 7 ', which is between the load plate 1 and the pressure plates 2 are located, adapted to the pressure of the load plate 1 to ensure the optimal movement compensation of the printing plates 2 to ensure during the first compression phase. This is about hiring the appropriate one Boost pressure in memory 29 reached.
  • the adjustment of the Boost pressure in the accumulator 29 takes place with the aid of a differential pressure switch 40 in the hydraulic line 25 is arranged and with which the boost pressure in the accumulator 29 a specific setpoint can be set.
  • the differential pressure switch 40 is via control lines 41 with the three-way valve 31 connected. The switches depending on the setpoint Differential pressure switch 40, the three-way valve 31 automatically in switch positions 37 or 38 (pressure increase or Pressure drop in the accumulator 29). Once the one you want The biasing force is set, the three-way valve 31 automatically returns to switch position 36 (depressurized Oil circulation) reset.
  • a Pressure relief valve 42 arranged in the switch position 38 (pressure reduction) of the three-way valve 31 the oil from the pump 33 into the tank 35. Possibly emerging Leakage oil during operation is also over the Differential pressure switch 40 by supplying oil from the Hydraulic system 27 balanced.
  • a manometer 43 is arranged. Since the Preload force of the pressure plates 2 linear depending on the pressure and the pressure plate area and the area of the pistons 9, the preload can be calculated using a conversion table can be read indirectly on the manometer 43.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP98111929A 1997-08-27 1998-06-27 Moule pour la fabrication d'articles pressés Withdrawn EP0911129A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997137248 DE19737248A1 (de) 1997-08-27 1997-08-27 Form zur Herstellung von Formkörpern
DE19737248 1997-08-27

Publications (2)

Publication Number Publication Date
EP0911129A2 true EP0911129A2 (fr) 1999-04-28
EP0911129A3 EP0911129A3 (fr) 2000-08-16

Family

ID=7840277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111929A Withdrawn EP0911129A3 (fr) 1997-08-27 1998-06-27 Moule pour la fabrication d'articles pressés

Country Status (2)

Country Link
EP (1) EP0911129A3 (fr)
DE (1) DE19737248A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1327513A2 (fr) * 2002-01-14 2003-07-16 WELKO INDUSTRIALE S.p.A. Presse pour le moulage de produits en matériaux céramiques
CN106863544A (zh) * 2017-03-16 2017-06-20 山西大学 一种用于发泡混凝土荷重静压发泡的装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10034167A1 (de) * 2000-07-13 2002-01-24 Kobra Formen & Anlagenbau Gmbh Form zur Herstellung von Formkörpern
JP2010042426A (ja) * 2008-08-13 2010-02-25 Ihi Corp プレス機械のスライド構造
JP6031127B2 (ja) * 2012-03-12 2016-11-24 ニーンシュテット ゲーエムベーハー 複数の容器内に食品のポーションを形成するための方法
ITPD20120277A1 (it) * 2012-09-20 2014-03-21 Mass Spa Stampo per piastrelle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250323B (de) * 1967-09-14 RINO Werke o HG Maschinen fabrik Bammental bei Heidelberg Maschine zum Her stellen von Formlingen, insbesondere von dünnen Platten aus Beton od dgl
US3890413A (en) * 1974-08-15 1975-06-17 Hydramet American Inc Apparatus and method for compacting particulate materials
DE2406688A1 (de) * 1974-02-13 1975-08-14 Oldenburger Betonsteinwerke Vorrichtung zum verdichten von formfuellungen, insbesondere betonfuellungen fuer betonsteinformen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1759429C3 (de) * 1968-04-30 1973-12-20 Villeroy & Boch Keramische Werke Kg, 6642 Mettlach Vorrichtung zum gleichzeitigen Pressen mehrerer plattenförmiger Presslinge
DE19537077A1 (de) * 1995-10-05 1997-04-10 Rampf Formen Gmbh Mehrkammerform und Verfahren zur maschinellen Herstellung von Betonformteilen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250323B (de) * 1967-09-14 RINO Werke o HG Maschinen fabrik Bammental bei Heidelberg Maschine zum Her stellen von Formlingen, insbesondere von dünnen Platten aus Beton od dgl
DE2406688A1 (de) * 1974-02-13 1975-08-14 Oldenburger Betonsteinwerke Vorrichtung zum verdichten von formfuellungen, insbesondere betonfuellungen fuer betonsteinformen
US3890413A (en) * 1974-08-15 1975-06-17 Hydramet American Inc Apparatus and method for compacting particulate materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1327513A2 (fr) * 2002-01-14 2003-07-16 WELKO INDUSTRIALE S.p.A. Presse pour le moulage de produits en matériaux céramiques
EP1327513A3 (fr) * 2002-01-14 2005-05-25 WELKO INDUSTRIALE S.p.A. Presse pour le moulage de produits en matériaux céramiques
CN106863544A (zh) * 2017-03-16 2017-06-20 山西大学 一种用于发泡混凝土荷重静压发泡的装置
CN106863544B (zh) * 2017-03-16 2023-05-30 山西大学 一种用于发泡混凝土荷重静压发泡的装置

Also Published As

Publication number Publication date
EP0911129A3 (fr) 2000-08-16
DE19737248A1 (de) 1999-03-18

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