EP4039433B1 - Presse à vibration à réglage amélioré - Google Patents

Presse à vibration à réglage amélioré Download PDF

Info

Publication number
EP4039433B1
EP4039433B1 EP22155280.5A EP22155280A EP4039433B1 EP 4039433 B1 EP4039433 B1 EP 4039433B1 EP 22155280 A EP22155280 A EP 22155280A EP 4039433 B1 EP4039433 B1 EP 4039433B1
Authority
EP
European Patent Office
Prior art keywords
positioning rod
holding device
length
relative
vibrating press
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.)
Active
Application number
EP22155280.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4039433A1 (fr
Inventor
Yann Jaubert
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.)
Alfi Technologies
Original Assignee
Alfi Technologies
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 Alfi Technologies filed Critical Alfi Technologies
Publication of EP4039433A1 publication Critical patent/EP4039433A1/fr
Application granted granted Critical
Publication of EP4039433B1 publication Critical patent/EP4039433B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B28B3/022—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 combined with vibrating or jolting
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0081—Process control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/022—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is subjected to vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides

Definitions

  • the present invention relates to a vibration press comprising at least one positioning rod with improved adjustment as well as a method for adjusting said positioning rod.
  • Concrete products such as blocks, slabs or pavers are generally molded using a vibration press.
  • a vibration press comprises a vibrating table supporting a removable plate on which is placed a mold for concrete.
  • concrete is introduced into the mold and the concrete is compacted by the combination of the vibrations of the vibrating table and the pressure of a tamper on the concrete.
  • a vibrating press 1 conventionally comprises a frame 2 intended to be fixed to the ground and on which is fixed a vibrating table 4.
  • the vibrating table 4 comprises an upper plate 6 supporting, during operation of the press 1, a removable plate 8 on which is placed a mold for concrete 10.
  • the vibration press 1 also comprises a frame 12 to which is attached a tamper 14 complementary to the mold 10.
  • the frame 12 is connected to the frame 2 via four longitudinal elements 16 along which the frame 12 can slide, the tamper 14 following the movements of frame 12.
  • the frame 12 must descend to a predefined level which depends in particular on the height of the concrete products to be manufactured and on the type of mold and tamper used.
  • This adjustment is carried out by means of positioning rods 18 which are fixed to the frame 2 by a first end and along which the frame 12 slides.
  • the positioning rods 18 comprise at their free end a stop 24 which stops the frame 12 at a predefined level so that the tamper 14 descends into the mold 10 at a predefined height.
  • a vibration press 1 generally comprises two to four positioning rods 18. The adjustment of the predefined height is done by modifying the position of the stop 24 along the positioning rod manually.
  • a disadvantage of such a device is that the adjustment of the various positioning rods is manual and it can be complicated to adjust each positioning rod 18 to the same length so that the stops 24 of each positioning rod 18 are positioned at the same level.
  • the adjustment precision is of the order of 1 to 1.5 mm, which is not sufficient.
  • the axis of a movable part 20 can deviate with respect to a vertical axis of the positioning rods 18 under the effect of the weight of the frame 12 and the tamper 14 d on the one hand, and vibrations of the vibrating table on the other hand.
  • the tamper 14 then risks coming into contact with the walls of the mould.
  • the tamper 14 is then no longer in an optimal position and risks coming into contact with the walls of the mold 10 during its descent.
  • the object of the present invention is therefore to improve the existing vibration presses and in particular to optimize the way of adjusting the positioning rods and/or the precision of the adjustment.
  • the positioning rod of the press allows precise adjustment of its length L, in particular with a precision of up to 0.1 mm, the length L being determined according to the mould, the tamper and/or the height of the concrete products to be made.
  • the length L defines the range of motion of the groomer.
  • the second portion When the device adopts the open position, the second portion is movable relative to the first portion and the length L can be adjusted easily. Once the positioning rod is at the predetermined length L, the device is placed in the closed position in which the second portion is immobilized with respect to the first portion, and the length L can then no longer be modified.
  • the holding device thus makes it possible to avoid any modification of the length L of the positioning rod during the process. Indeed, during the process a large number of concrete products are manufactured one after the other. The tamper is then repeatedly subjected to the vibrations of the vibrating table and is also lowered and raised a large number of times.
  • the holding device advantageously makes it possible to maintain the precise adjustment of the length L as it has been achieved, and this, throughout the process and despite the movements and shocks to which the rod is subjected.
  • the second portion is movable in translation relative to the first portion, and also relative to the holding device, itself immobile relative to the frame.
  • the first portion is on its side immobile in translation relative to the holding device and to the frame.
  • the holding device can surround the first portion of the positioning rod over its entire length or only over part of its length.
  • the holding device can surround the second portion of the positioning rod over its entire length or only over part of its length.
  • the holding device surrounds the first portion over its entire length and the second portion over only part of its length.
  • the second portion comprises a free portion between the holding device and a free end and the tamper slides along this free portion.
  • the adjustment of the length L is carried out automatically by means of a control device.
  • the modification of the length of the positioning rod is carried out automatically with an accuracy of up to 0.1 mm.
  • a positioning rod 40 according to one embodiment of the invention is illustrated in the figures 2a and 2b .
  • the positioning rod 40 comprises a first portion 50 and a second portion 60 as well as a holding device 80.
  • the first portion comprises a first end 52 by which it is connected to the second portion 60, as well as a second end 54 by which it is connected to a motor 90.
  • the motor 90 comprises a rotation shaft 92 which is connected to the first end 52 via the coupling piece 94.
  • the second portion 60 has a free end 61 and a second end 62 by which the second portion 60 is connected to the first end 52 of the first portion 50.
  • the second end 62 forms a sleeve 63 which surrounds at least a part of the first end 52.
  • the sleeve 63 comprises an elongated cavity 64 making it possible to accommodate a more or less large part of the first end 52 depending on the setting of the positioning rod 40 which will be described later.
  • the sheath 63 is extended by a solid part 65 of the rod which comprises a free part 66 which emerges from the holding device 80 and along which a tamper is intended to slide when the positioning rod 40 is fixed on a vibration press. .
  • the second portion 60 comprises a stop 70 which makes it possible to stop the sliding of the tamper along the positioning rod 40, and in particular along the free part 66.
  • the stop 70 is conventionally a washer metal fixed around the free end 61 by fixing screws, or by welding, screwing, gluing, etc.
  • the free part 66 has a variable length L which depends on the adjustment of the positioning rod 40.
  • the length L is measured between the holding device 80 and the stop 70. It is this length L which is lengthened or shortened according to the desired stroke for a tamper which slides along the positioning rod 40.
  • the length L varies from 0 mm to 500 mm depending on the adjustment of the length of the rod. This length can vary from one positioning rod to another and can be adapted to the vibration press on which the positioning rod is intended to be fixed.
  • the holding device 80 comprises on its periphery a bearing surface 80' which extends in a plane perpendicular to the longitudinal axis of the holding device 80. This surface 80' is fixed to a fixed frame in a manner described further away.
  • the position of the abutment 70 is determined relative to the bearing surface 80' and according to the height of the piece of concrete that one wishes to manufacture. In this embodiment, the length L' between the bearing surface 80' and the abutment 70 varies between 820 mm and 1320 mm.
  • the holding device 80 is positioned around the first portion 50 and around a part of the second portion 60.
  • the holding device 80 comprises a first end 81 fixed to a box 92' placed around the motor 90.
  • the second end 82 is positioned around the solid part 65 of the second portion 60.
  • the holding device 80 forms thus a sheath 87 which extends between its first end 81 and its second end 83, the sheath 87 tightly holding the positioning rod 40.
  • the holding device comprises a rod blocker 83 which is, in this embodiment, a hydraulic jack.
  • the rod blocker 83 conventionally comprises a first chamber 84 and a second chamber 85 comprising a spring 85' as well as a piston and a conical clamp 86 for tightening, the piston and the clamp being positioned between the first and the second chambers 84 and 85 and making it possible to block, in particular in translation, the solid part 65 of the second portion 60.
  • the rod blocker 83 is hydraulic and is supplied by the conduits 87". According to another possible embodiment, it may be pneumatic. The operation of the rod blocker will be described later when describing the method for adjusting the positioning rod 40.
  • FIG. 3 illustrates a detailed longitudinal sectional view of part of the positioning rod 40, in particular of the part between the motor 90 and the rod blocker 83.
  • the holding device 80 comprises, inside the sheath 87, an intermediate portion 88 intended to tightly surround the first portion 54. Between its second end 54 and its first end 52, the first portion 50 is surrounded by a nut 55 which makes it possible to block a first washer 56 and a second washer 57 against an upper surface 89 of the intermediate portion 88. The nut 55, the first washer 56 and the second washer 57 allow locking in translation of the first portion 50.
  • the first end 52 of the first portion comprises a male thread 58 intended to cooperate with a female thread of the second portion 60.
  • the second portion 60 comprises, at its second end 62, an adjustment nut 67 inserted into one end open of the sheath 63 and comprising a female thread 68 complementary to the thread 58.
  • the first and second portions 50 and 60 are thus screwed together by their respective threads 58 and 68 and are also movable relative to each other. to the other via these same threads as described later.
  • the first portion may include a female thread and the second portion may include a male thread.
  • the adjusting nut 67 comprises a first part 67" inserted into the sheath 63 and a second part 67' surmounting the sheath 63 and being in contact with the interior of the sheath 87 of the holding device 80 via the circular joint 69.
  • the circular joint 69 makes it possible to produce elastically deformable physical contact between the second portion 60 and the holding device 80 which surrounds it.Thus, the positioning rod 40 remains tightly held by the holding device 80 and the shocks and vibrations they experience do not risk damaging the 58 and 68 threads.
  • the motor is connected to a first control device 98 making it possible to control the starting of the motor 90 or its stopping.
  • the rod blocker 83 is for its part connected to a second control device 99 allowing passage from the closed position to the open position and vice versa.
  • the first and second control devices 98 and 99 notably allow the motor and the rod blocker to be controlled automatically.
  • a control device 95 can allow signals to be sent between the control device 98 and the control device 99 so as to start the motor 90 only when the rod blocker 83 is in an open and closed position. stop the motor 90 before placing the rod blocker 83 in its closed position.
  • the positioning rod is formed essentially of metal elements allowing the rod to have good solidity.
  • a method for adjusting the positioning rod 40, and in particular its length, will be described with reference to the figure 2b , 4a and 4b .
  • the rod blocker 83 is in an open position in which the second portion 60 is mobilized relative to the first portion 50.
  • the rod blocker 83 is placed in this open position by a change of pressure in the first and the second chamber 84 and 85 so that the pressure in the first chamber 84 is greater than the pressure in the second chamber 85.
  • the piston moves in the direction of the second chamber 85 and clamp 86 then no longer exerts pressure on second portion 60 which thus becomes mobile inside rod blocker 83.
  • the motor can be started so as to be able to induce the translation of the second portion relative to the first portion and thus be able to modify the length of the positioning rod. , and in particular the length L.
  • the motor 90 causes the rotation of the first portion 50 which is connected to the shaft 92 of the motor, the first portion 50 being fixed in translation relative to the holding device 80.
  • the second portion 60 is locked in rotation relative to the first portion 50 by means of a key 96 fixed to an outer wall of the sheath 63 and inserted into a complementary longitudinal rib 97 positioned on an internal face of the holding device 80.
  • the rotation of the first portion 50 relative to the holding device 80 will cause the translation of the second portion 60 relative to the holding device 80.
  • the first portion 50 will screw or unscrew the second portion 60 which will then approach the motor 90 or on the contrary move away from the latter, resulting in a modification of the length of the positioning rod, and in particular of the length L of the free part 66.
  • the length L of the free part 66 is increased to have the length visible on the figure 4b .
  • the rod blocker 83 is then returned to a closed position by creating a depression in the first chamber 84 so that the piston moves towards the first chamber 84.
  • the conical clamp 86 then exerts significant pressure on the second portion 60, and in particular on the solid part 65.
  • the positioning rod 40 thus adjusted is illustrated in the figure 4b .
  • the holding device 80 adopts the closed position, any translation of the second portion 60 relative to the holding device 80 is prevented.
  • the holding device 80 allows the first and the second portions to remain aligned along the same axis. Indeed, when the positioning rod 40 is attached to a vibration press, the free end 61 could easily perform lateral movements under the effect of the weight of the tamper and the vibrations.
  • the holding device 80, and in particular the rod blocker 83 making it possible to hold the first and the second portions 50 and 60 in the same axis.
  • a control device can also make it possible to measure the length L and to send a signal to the first and to the second control device 98 and 99 as a function of the length so as to start the adjustment process or to stop it.
  • This control device may be device 95.
  • the modification of the length of the positioning rod is carried out automatically with an accuracy of up to 0.1 mm.
  • FIG. 5 illustrates a vibrating press 100 according to one embodiment of the invention.
  • the vibration press 100 differs from the vibration press 1 only by the rods 40 which replace the rod 20 and by the presence of the control devices 98 and 99 and the control device 95.
  • the positioning rod 40 is as described with reference to the figure 1 , 2a-b And 4a-b and the tamper 14 is movable between the holding device 80 and the abutment 70.
  • the tamper comprises a frame 12 and it is the frame 12 which slides between the holding device 80 and the abutment 70.
  • the positioning rod 40 is fixed to the frame by means of the holding device 80, the fixing taking place by mechanical clamping at the level of a part 80' projecting along the holding device 80.
  • the vibrating press 100 includes four positioning rods 40.
  • the vibrating press 100 can include a greater or lesser number of positioning rods 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
EP22155280.5A 2021-02-04 2022-02-04 Presse à vibration à réglage amélioré Active EP4039433B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2101089A FR3119341B1 (fr) 2021-02-04 2021-02-04 Presse à vibration à réglage amélioré

Publications (2)

Publication Number Publication Date
EP4039433A1 EP4039433A1 (fr) 2022-08-10
EP4039433B1 true EP4039433B1 (fr) 2023-05-03

Family

ID=75278209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22155280.5A Active EP4039433B1 (fr) 2021-02-04 2022-02-04 Presse à vibration à réglage amélioré

Country Status (4)

Country Link
EP (1) EP4039433B1 (pl)
ES (1) ES2951160T3 (pl)
FR (1) FR3119341B1 (pl)
PL (1) PL4039433T3 (pl)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129482A (en) * 1962-05-09 1964-04-21 Harry A Wellnitz Control system for a concrete block forming machine
AT288941B (de) * 1968-09-18 1971-03-25 Kurt A Dipl Kfm Heymer Vorrichtung zum Herstellen höhengenauer Formkörper aus Beton od.dgl.
US6106264A (en) * 1998-06-25 2000-08-22 Newtec Building Products Inc. Apparatus for molding blocks
CN211030480U (zh) * 2019-08-06 2020-07-17 宜兴市新凯耐火材料有限公司 一种轻质砖成型机击打装置

Also Published As

Publication number Publication date
PL4039433T3 (pl) 2023-09-18
FR3119341B1 (fr) 2023-01-13
FR3119341A1 (fr) 2022-08-05
ES2951160T3 (es) 2023-10-18
EP4039433A1 (fr) 2022-08-10

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