EP0107752A1 - Procédé et dispositif pour la fabrication de matériaux de dimensions de grain différentes à partir de mélanges - Google Patents

Procédé et dispositif pour la fabrication de matériaux de dimensions de grain différentes à partir de mélanges Download PDF

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Publication number
EP0107752A1
EP0107752A1 EP83106667A EP83106667A EP0107752A1 EP 0107752 A1 EP0107752 A1 EP 0107752A1 EP 83106667 A EP83106667 A EP 83106667A EP 83106667 A EP83106667 A EP 83106667A EP 0107752 A1 EP0107752 A1 EP 0107752A1
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EP
European Patent Office
Prior art keywords
container
coarse
fine
sieve
mixture
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.)
Granted
Application number
EP83106667A
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German (de)
English (en)
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EP0107752B1 (fr
Inventor
Helmut Thal
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Individual
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Individual
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Filing date
Publication date
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Priority to AT83106667T priority Critical patent/ATE22824T1/de
Publication of EP0107752A1 publication Critical patent/EP0107752A1/fr
Application granted granted Critical
Publication of EP0107752B1 publication Critical patent/EP0107752B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating

Definitions

  • the invention relates to a method and an apparatus for the production of substances, for. B. of foundry sand, different grain size from mixtures, z. B. from hot, previously used, bonded with resin and reinforced with metal parts foundry molding mixtures that vibrate on rising surfaces, crushed and separated from their gravity by promotion from a lower entrance area to a higher exit area.
  • the substance mixture reaches a rising surface after a coarse sieving at the bottom of a container through a passage opening in a wall, above which bumpers are arranged at regular intervals to one another and to the inclined surface.
  • the container, the rising surface and the bumpers are vibrated together by a vibration exciter.
  • the mixture of substances climbs up the ascending surface, being crushed by the bumpers that have the shape of a comb, circulated and finally in an uncontrollable grain size is pressed over the exit area at the end of the rising surface and fed to a device connected to it for further treatment.
  • this method In addition to a large expenditure on equipment, this method also requires a considerable amount of space, which can amount to a depth of 5 m and a length of 10 m and more from the zero level near the upper edge of the container. To produce the substances from the substance mixtures, several drives which are to be operated independently of one another and correspondingly high operating costs are also required.
  • the invention has for its object to provide a manufacturing method or an apparatus for performing this method of the type mentioned, which are characterized by a lower equipment costs and space requirements and a high efficiency of the crushing and Separation of mixtures of substances into finished products, intermediate products and waste products guaranteed.
  • the mixture of oversize particles as an intermediate product is subjected to a recirculation process for further comminution and, on the other hand, the substance that falls through during the fine screening with the desired fine grain size is removed as a finished product from the manufacturing process.
  • the invention thus follows a principle that deviates entirely from the prior art. While in the prior art several differently designed shredding sections of different vibrating devices are connected in series, the invention is characterized by a compact recirculation process of the intermediate product, so that in the end result only a finished product with the desired grain size and waste products remain.
  • the process upstream of the fine screening is a mixing process between screening and coarse screening with the aim of reducing the size of the mixture and at the same time restraining mixtures that are well above the oversize.
  • This mixing process results in a strong circulation of the mixture of materials and thus a high level of abrasion and, in turn, considerable comminution.
  • the mixture of substances before its coarse screening is advantageous in that with a large upper surface-roughened containers are exposed to strong friction, impact and shock forces.
  • a compact procedure with little investment is achieved in that the crushing, screening, coarse and fine screening and the separation and conveyance of the individual substances of the mixture of substances in intermediate, finished and waste products in and on the same container with only one vibration exciter is carried out.
  • the intermediate and finished products can be cooled during their passage on the rising surfaces by means of natural or forced convection.
  • a device is known with a rotationally symmetrical container to be loaded with mixtures of substances from above, which has a coarse sieve in its interior that extends over its cross-sectional area and is inclined from the center towards the inner wall, and one from the edge of the coarse sieve on the Has inner wall of the container rising internal spiral surface, which leads to the upper edge forming the exit region of the container.
  • This known device is for the sorting of crumbly or brittle goods, for. B. waffles, cookies or confectionery pieces, which are provided with a slightly crumbling coating. This device is therefore only suitable for separating finished products and waste products and for further conveying the finished products out of the container.
  • this device is not suitable and does not suggest such a device, since it only has the task of correctly feeding finished products into a helical winding ramp, whereby only the finished products are to be cleaned of dust and crumbs. A reduction of substances with this device is even undesirable and the production of an intermediate product from a mixture of substances of different grain sizes is not possible.
  • a fine sieve is arranged below the coarse sieve and above the edge line of the fine sieve there is a through opening in the container wall, to which is attached a rising outer spiral surface attached to the outer wall of the container, which connects with it ⁇ rem end is guided above the coarse screen through a second through opening into the interior of the container.
  • the fine sieve is advantageously provided on its surface with a guide spiral in the form of a logarithmic spiral, the origin of which is arranged in the region below the central opening of the funnel and the end of which is guided approximately tangentially into the passage opening to the outer spiral.
  • this guide spiral the sifted and coarsely sieved material falling through the central opening of the funnel can be guided over a considerable distance on the fine sieve, as a result of which not only a sieving process but also a comminuting viewing process takes place.
  • this arrangement desirably increases the throughput of the recirculation process of the intermediate product with a nevertheless compact arrangement before the intermediate product returns to the passage opening to the outer coil and from there to the container space above the coarse screen.
  • a closed base plate is arranged below the fine sieve in the container and a second through opening in the container wall is arranged at the edge thereof, which is followed by a second, rising outer spiral surface attached to the container wall, which leads to an exit area for the finished product is led.
  • the transport route of the finely screened finished product is arranged in a clever arrangement the device is integrated without an additional conveying unit and thus an additional drive with the resulting operating costs being required for the upward conveyance of this finished product, for example into a classifier with subsequent conveyor and silo.
  • An adjustable tensioning device that tightens the fine sieve is advantageously detachably attached to the closed base plate.
  • the outer spiral surfaces are designed as channels known per se, under the bottom surfaces of which cavities are arranged for heat transfer.
  • Such channels suitable for heat transfer, for example for a cooling process, are known from DE-PS 1 080 927 both in a side-by-side arrangement and in a top-down arrangement.
  • the inner spiral surface consists of a flat steel, the surface of which is inclined toward the inner wall of the container, for example by approximately 5 °.
  • this inner helix surface is ultimately only suitable for the upward transport of waste products that are inaccessible to size reduction through screening and coarse screening. Waste products of this type are conveyed out to an exit area via the inner helix surface.
  • the inner helix also has the function of a comminution or refraction element.
  • the width of the inner spiral surface increases in the direction of it Slope, and it is on its free edge with rough projections, for. B. with the mixture of grinding teeth.
  • the waste products are cleaned shortly before leaving the container in that the inner helix surface near its exit area from the container is designed as a sieve and in front of it a locking flap which blocks the inner helix surface and can be actuated from the outside is arranged .
  • the latter is designed as an abrasion plate with longitudinal slots running perpendicular to the conveying direction of the material mixture and / or sharp-edged ridges, knobs, crescent-shaped, sharp-edged notches or the like, similar to a grater or rasp.
  • the container is advantageously designed as a hollow cylinder and above the exit area of the inner and outer spiral surfaces covered by a perforated grate detachably connected to it.
  • the new device 1 for carrying out the method according to the invention essentially consists of a cylindrical container 2, in which a coarse sieve 3, a funnel 4 with a central opening 5, a guide spiral 6, a fine sieve 7 and a final bottom plate are arranged with one another 8 are arranged.
  • a clamping device 10 for the fine sieve 7, which can be adjusted via the nuts 9, is detachably attached.
  • an inner helix surface 11 which rises from the edge 3' of the coarse screen 3 inclined from the center to the inner wall 2 'to the upper edge forming the exit region 2 "of the container 2.
  • an oversize particle size is understood to mean a particle size that is larger than the sieve openings 7 ′ of the fine sieve 7.
  • a third through opening 16 is arranged in the container wall at its edge 8 '.
  • the second, rising outer spiral surface 13 for the upward conveyance of the fine sieve 7 is connected to this third passage opening 16 let through finished product.
  • This second outer helical surface 13 is provided on its base 13 'with a cavity 17 for the flow of a heat transfer medium.
  • the finished product picked up by the second outer helical surface 13 can be cooled on the way to the exit region 18, from there into a sifter 19 and finally via a z.
  • the container 2 is arranged on a central base 22, to which two vibration exciters 24, spaced 90 ° apart with their longitudinal axes 23, and several feet 27 having supports 26 which are elastic toward the bottom surface 25 are fastened.
  • the vibration exciter 24 can be designed both electromagnetically, electrodynamically and as a resonance oscillator.
  • the container 2 is covered above the inner and outer helical surfaces 11, 12, 13 by a perforated grating 28 which is detachably connected to it and indicated by dash-dotted lines.
  • the origin 6 'of the guide spiral 6 consisting of a sheet metal strip is arranged below the central opening 5 of the funnel 4, while the end 6 "of the guide spiral is approximately tangential in the Through opening 14 ends in the container 2, which in turn connects to the first outer helical surface 12.
  • the inner spiral surface 11 consists of a flat steel, the surface of which is inclined to the inner wall 2 'of the container by an angle ⁇ of, for example, 5 °.
  • the width B of the inner spiral surface 11 increases in the direction of its slope and is on its free edge 11 'with rough projections 29, z. B. with the mixture of grinding teeth.
  • the spiral is designed as a sieve 31 and in front of it a blocking flap 32 which locks the inner spiral surface 11 and can be actuated from the outside is arranged.
  • the inner helical surface 11 and the outer helical surfaces 12, 13 are detachably fastened to the container 2 or provided with detachable, not shown wear pads.
  • the coarse screen 3 is designed as an abrasion plate, similar to a grater or rasp.
  • the abrasion effect can be increased on the one hand by longitudinal slots 34 running perpendicular to the conveying direction in the direction of arrow 33 and / or with sharp-edged ridges or knobs 35 and / or with crescent-shaped, sharp-edged notches 36.
  • any configuration of the coarse sieve 3 is suitable which increases the abrasion effect of the mixture of substances that is constantly circulated by the vibrations.
  • the coarse sieve 3 must be considered not only as a sieve device, but also as a viewing device which crushes the mixture of substances.
  • FIG. 5 shows the top view of the floor panel S. along the section line V / V of FIG. 2.
  • the finished product located on it is guided by the oscillating and vibrating movements of the device 1 along a guide plate 37 to the third passage opening 16 into the container 2, from where it rises to the second outer spiral surface 13 whose output area 18 and from there is conveyed into the classifier 19.
  • the mixture reaches the interior of the container 2 via the perforated grate 28. Since the container 2 is set into oscillating and vibrating movements by means of the vibration exciters 24, the comminution of the mixture of substances begins at the penetration grate 28 without an additional conveying device for introducing the mixture of substances is required.
  • the mixture is circulated above the coarse sieve 3 by constant circular and pushing movements and broken at the prong-like projections 29 of the inner helix surface and on the underside 11 "of the helix 11 widening in the direction of the exit area 30.
  • For an additional abrasion provides the coarse sieve 3 with its longitudinal slots 34 as described in Fig.
  • the material mixture falling through the coarse sieve 3 falls on the trimmer 4, from where it passes through the central opening 5 reaches the fine screen 7.
  • the finished product falling through the fine screen 7 reaches the second outer helix 13 via the base plate 8, on which it is conveyed upwards in the direction of the exit region 18 by the vibrations originating from the vibration exciters 24 and from there into the classifier 19.
  • the finished product can be cooled by a heat transfer medium flowing through the cavity 17 at the bottom 13 '.
  • the latter applies, for example, to foundry sand made from a mixture of foundry materials.
  • the oversize material mixture remaining on the fine sieve 7 is conveyed along the guide spiral 6 described in FIG. 3 as long as possible to the first passage opening 14.
  • the guide path effected by the spiral 6 is therefore deliberately designed to be long enough to subject the mixture of oversize particles on the fine sieve 7 to a friction effect on this fine sieve 7.
  • the mixture of oversize particles reaches the second passage opening 15 from the first outer spiral surface 12, from where it returns to the interior of the container 2. This creates a recirculation cycle for the oversized grain mixture.
  • the tensioning device 9, 10 is used for retensioning the fine screen 7.
  • waste product not falling through the coarse sieve migrates to that of the edge 3 'of the coarse sieve 3 rising inner spiral surface 11 upwards in the direction of the exit area 30.
  • the metal parts serving for reinforcement would be conveyed up on the inner spiral surface 11.
  • the term "waste product" is not to be taken literally, but to be understood to include substances whose grain size is larger than the largest sieve opening of the coarse sieve 3.
  • the blocking flap 32 shown in FIG. 4 assumes the blocking position shown therein. As a result, the exit region 30 of the inner helical surface 11 is blocked. As soon as the coarse components that do not fall through the coarse sieve 3, called waste products for short, are to be conveyed out of the container 2, the locking flap 32 is pivoted in the direction of the arrow 38 according to FIG. 4 and the path from the inner helix surface 11 to its exit region 30 is thus cleared . However, before the waste product conveyed up on the inner spiral surface 11 reaches the exit area 30, it is forced to pass through the sieve surface 31, on which it is cleaned of adhering fine constituents. From the exit area 30, the waste product falls onto the slide 39 indicated in FIGS.
  • the new process and the new device are characterized by a particular compactness, a small space requirement and by a high efficiency with regard to the comminution of substance mixtures.
  • the entire method and the entire device are operated by only a single vibration source, namely the vibration exciters 24, considerable savings in operating costs can be achieved, which must also be provided for comparable conveyor methods for additional conveying devices.
  • the above device also permits various modifications, depending on the type of substance mixture to be treated therein.
  • the fine sieve 7 can be replaced by the base plate 8 and the second outer helical surface 13 can cease to exist.
  • the device according to the invention also permits the arrangement of a plurality of screens 7, which may possibly be designed like the coarse screen 3, as well as additional outer helix surfaces arranged with one another and next to one another.
  • the angle of inclination of the outer helical surfaces 12, 13, which generally increase in the same direction, can likewise be the grain sizes of the individual Components of the intermediate and finished products are adjusted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP83106667A 1982-07-12 1983-07-07 Procédé et dispositif pour la fabrication de matériaux de dimensions de grain différentes à partir de mélanges Expired EP0107752B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83106667T ATE22824T1 (de) 1982-07-12 1983-07-07 Verfahren und vorrichtung zur herstellung von stoffen unterschiedlicher korngroesse aus gemischen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3226049 1982-07-12
DE3226049A DE3226049C2 (de) 1982-07-12 1982-07-12 Verfahren und Vorrichtung zur Aufbereitung von Gießereialtsand

Publications (2)

Publication Number Publication Date
EP0107752A1 true EP0107752A1 (fr) 1984-05-09
EP0107752B1 EP0107752B1 (fr) 1986-10-15

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EP83106667A Expired EP0107752B1 (fr) 1982-07-12 1983-07-07 Procédé et dispositif pour la fabrication de matériaux de dimensions de grain différentes à partir de mélanges

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EP (1) EP0107752B1 (fr)
AT (1) ATE22824T1 (fr)
DE (1) DE3226049C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223190A (en) * 1988-09-30 1990-04-04 Gen Kinematics Corp Material classifying apparatus
WO2003013760A2 (fr) * 2001-08-07 2003-02-20 Noram Technology, Ltd Produits de fabrication de moules et de noyaux utilises pour le coulage de metaux, et leur procedee fabrication et de recyclage a partir de roche concassee
EP2689868A3 (fr) * 2012-07-25 2014-08-27 AKADEMIA GORNICZO-HUTNICZA im. Stanislawa Staszica Dispositif de récupération vibratoire de sable de fonderie déjà utilisé
CN106946000A (zh) * 2017-05-09 2017-07-14 新乡市东振机械制造有限公司 一种冷却式提升机
CN113575999A (zh) * 2021-07-22 2021-11-02 漳州福荣饲料科技有限公司 一种猪饲料生产用的清理装置
CN116674214A (zh) * 2023-05-21 2023-09-01 江苏万恒铸业有限公司 带有筛分功能的铸钢件铸造废料回收装置及其回收方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4563268A (en) * 1984-10-09 1986-01-07 Polysar Financial Services S.A. Method of discharging particles from a vibrating filter screen
US6000644A (en) * 1997-07-31 1999-12-14 General Kinematics Corporation Method and apparatus for reclaiming foundry sand
DE102009031277A1 (de) * 2009-06-30 2011-01-13 WEBAC Gesellschaft für Maschinenbau mbH Verfahren zum Reinigen von gebrauchtem Gießereisand
CN113402136B (zh) * 2021-06-17 2023-10-24 浙江宜可欧环保科技有限公司 含油污泥筛分热洗联合预处理方法及装置
CN113617669A (zh) * 2021-08-11 2021-11-09 深圳市惠亿达电子科技有限公司 一种五金销售用五金螺丝智能分拣装置
CN116986914B (zh) * 2023-08-24 2024-02-13 衡阳凯新特种材料科技有限公司 一种氮化硅生物陶瓷材料的制备系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1431489B (de) * Societe dEtudes & de Realisations Industrielles, SERI, Fourmer & Mouillon, Genelard Saone et Loire (Frankreich) Wendelschwingförderer
DE1456805A1 (de) * 1966-01-08 1968-12-19 Rose Forgrove Ltd Zylindrischer Ruettelfoerderer mit ansteigendem Foerderweg
DE2037371B2 (de) * 1969-07-22 1974-09-26 General Kinematics Corp., Barrington, Ill. (V.St.A.) Vertikalschwingförderer zum Befördern eines stückigen oder körnigen Materials
DE2739941A1 (de) * 1977-04-15 1979-03-15 Richards Structural Steel Co L Ruettelfoerderer
DE3019015A1 (de) * 1979-05-21 1980-12-04 Rexnord Inc Wendelschwingfoerderer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205796A (en) * 1978-03-03 1980-06-03 Rexnord Inc. Vibrating reclaimer of foundry mold material
DE3021490C2 (de) * 1980-06-07 1985-11-21 Alb. Klein Gmbh & Co Kg, 5241 Niederfischbach Verfahren und Vorrichtung zum Aufbereiten von Sandknollen-Gemischen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1431489B (de) * Societe dEtudes & de Realisations Industrielles, SERI, Fourmer & Mouillon, Genelard Saone et Loire (Frankreich) Wendelschwingförderer
DE1456805A1 (de) * 1966-01-08 1968-12-19 Rose Forgrove Ltd Zylindrischer Ruettelfoerderer mit ansteigendem Foerderweg
DE2037371B2 (de) * 1969-07-22 1974-09-26 General Kinematics Corp., Barrington, Ill. (V.St.A.) Vertikalschwingförderer zum Befördern eines stückigen oder körnigen Materials
DE2739941A1 (de) * 1977-04-15 1979-03-15 Richards Structural Steel Co L Ruettelfoerderer
DE3019015A1 (de) * 1979-05-21 1980-12-04 Rexnord Inc Wendelschwingfoerderer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223190A (en) * 1988-09-30 1990-04-04 Gen Kinematics Corp Material classifying apparatus
GB2223190B (en) * 1988-09-30 1992-09-23 Gen Kinematics Corp Material classifying apparatus
WO2003013760A2 (fr) * 2001-08-07 2003-02-20 Noram Technology, Ltd Produits de fabrication de moules et de noyaux utilises pour le coulage de metaux, et leur procedee fabrication et de recyclage a partir de roche concassee
WO2003013760A3 (fr) * 2001-08-07 2003-10-23 Noram Technology Ltd Produits de fabrication de moules et de noyaux utilises pour le coulage de metaux, et leur procedee fabrication et de recyclage a partir de roche concassee
US6691765B2 (en) 2001-08-07 2004-02-17 Noram Technology, Ltd. Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock
EP2689868A3 (fr) * 2012-07-25 2014-08-27 AKADEMIA GORNICZO-HUTNICZA im. Stanislawa Staszica Dispositif de récupération vibratoire de sable de fonderie déjà utilisé
CN106946000A (zh) * 2017-05-09 2017-07-14 新乡市东振机械制造有限公司 一种冷却式提升机
CN113575999A (zh) * 2021-07-22 2021-11-02 漳州福荣饲料科技有限公司 一种猪饲料生产用的清理装置
CN116674214A (zh) * 2023-05-21 2023-09-01 江苏万恒铸业有限公司 带有筛分功能的铸钢件铸造废料回收装置及其回收方法
CN116674214B (zh) * 2023-05-21 2023-11-24 江苏万恒铸业有限公司 带有筛分功能的铸钢件铸造废料回收装置

Also Published As

Publication number Publication date
DE3226049A1 (de) 1984-01-12
EP0107752B1 (fr) 1986-10-15
ATE22824T1 (de) 1986-11-15
DE3226049C2 (de) 1984-08-30

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