EP0240425A1 - Verfahren und Vorrichtung zum Mitteilen von Mehrrichtungsschwingungen an eine federnd gestützte Auflage - Google Patents
Verfahren und Vorrichtung zum Mitteilen von Mehrrichtungsschwingungen an eine federnd gestützte Auflage Download PDFInfo
- Publication number
- EP0240425A1 EP0240425A1 EP87400703A EP87400703A EP0240425A1 EP 0240425 A1 EP0240425 A1 EP 0240425A1 EP 87400703 A EP87400703 A EP 87400703A EP 87400703 A EP87400703 A EP 87400703A EP 0240425 A1 EP0240425 A1 EP 0240425A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vibrations
- elastic support
- rotation
- vibration generator
- unidirectional
- 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
Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000004576 sand Substances 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 13
- 230000005484 gravity Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18544—Rotary to gyratory
Definitions
- the invention relates to a method for applying multidirectional vibrations to an elastic support as well as the apparatus designed for the implementation of this method.
- Unidirectional vibration generators are known which are designed to apply unidirectional vibrations to an elastic support.
- Unidirectional vibration generators are known in particular which comprise an eccentric which cooperates with the vibrated elastic mass.
- multidirectional vibrations must be applied to the support to be vibrated. This is particularly the case in foundries, during sand molding operations where the latter is vibrated to be compacted on the model, when the molding must be of high quality, that is to say when the footprint left in the sand by the model must be with great precision.
- the unidirectional vibrations generally applied to the sand are then not sufficient to ensure effective clamping of the latter on the model according to the different orientations of the faces thereof.
- the object of the present invention is to remedy this drawback and it provides a method making it possible, from a source of unidirectional vibrations, to apply to an elastic support vibrations which are oriented in multiple directions, as well as an apparatus ensuring the implementation of this process.
- the source of unidirectional vibrations is given a rotational movement in a plane parallel to that of the elastic support, thereby varying the direction of the vibrations applied to said support.
- the apparatus for implementing the method comprises a source of unidirectional vibrations cooperating with the elastic support and means which ensure the rotation of the unidirectional vibration generator in a plane parallel to that of the elastic support.
- a generator of the eccentric type is used. which attacks at a determined angle a spherical part mounted in free rotation on the underside of the vibrating table.
- the vibrating table is fixed in rotation, while the vibration generator is mounted on a support plate designed to rotate around a vertical axis passing through the center of gravity of the table.
- the molding table receives vibrations oriented in all directions so that the friction of the molding sand particles in the rest state carried by the table is decreased, evacuation air is improved and the sand particles, whatever their shapes, are stored in the smallest volume and become embedded in each other.
- the compaction thus carried out also makes it possible to obtain better rigidity of the mold.
- An adjustment in operation of the frequency of the vibrations can be obtained by associating a speed variator with the drive motor of the eccentric of the generator, and an adjustment in operation of the amplitude of the vibrations can be obtained by mounting the eccentric of vibration on a second eccentric relative to which it can turn, on command, the desired angle to vary the eccentricity of the eccentric of attack.
- Such a variation in amplitude in operation is particularly advantageous for application to molding lines where the molds to vibrate follow one another at regular intervals on the vibrating table.
- a frame resting on the ground and which supports at its upper part, by means of four vibration springs 2 of vertical axis, a horizontal plate 3 constituting a molding table.
- the frame 1 carries, by means of a support 4, a horizontal plate 5 which rests on the support 4 by means of rollers 6.
- the plate 5 is secured to a shaft vertical 7 arranged inside a housing 8 and driven in rotation by a motor 9.
- the horizontal plate 5 is integral at its front and rear ends with trapezoidal vertical walls 10 each having at its upper end a bearing 12 opposite which is disposed a bearing 13 secured to the upper end of each end wall 14 of a cradle 15 , articulated to the walls of the plate 5 by horizontal axes 16 passing through the bearings 12, 13.
- the cradle 15 carries a unidirectional vibration generator as described in French patent 2,367,542, that is to say comprising an eccentric of vibration 17 driven in rotation by a motor 18 and a belt 19 and engaging a spherical element 20 mounted in free rotation on the underside of the molding table 3 in the vicinity of the center of gravity thereof.
- the cradle 15 is secured, by its underside, to a rack 21 in the form of an arc of a circle, designed to mesh with a pinion 22 mounted to rotate on a yoke 23 carried by the plate 5.
- a geared motor group 24 also carried by the plate 5, is designed to drive the pinion 22 in rotation by means of a belt 25.
- the latter In order to allow adjustment in operation of the amplitude of the vibrations provided by the eccentric 17 the latter, in the manner known by French patent 2,367,542, is mounted on a control shaft 26 by means of a inner eccentric forming hub.
- a differential pulley 28 is mounted on the shaft 26 and drives, by a pinion fixed to the planet gear cage, a ring gear carried by the eccentric 17.
- a stepping brake motor 29 controls the differential pulley to add or subtract a rotational movement chosen at the eccentric 17 in order to offset it relative to the hub 27 by varying the eccentricity.
- the gear motor 24 is actuated to adjust the angle of attack of the spherical rotating part 20, then the internal eccentric 27 is adjusted so as to cancel the eccentricity of the eccentric of vibration 17.
- the eccentric 17 is rotated at a speed designed to produce a vibration frequency close to the natural frequency of the table to be vibrated, then by action on the stepping motor step 29, unidirectional vibrations are applied to table 3 by passing the amplitude of these vibrations from zero to the desired value.
- the rotation of the plate 5 is then produced around the vertical axis XX while ensuring the attack of the spherical part 20 by the eccentric 17 in multiple directions thereby communicating to the molding table 3 the multidirectional vibrations desired.
- the vibration period of the mold placed on the table 3 is completed, bring back at zero the amplitude of the vibrations by controlling the stepping motor 29 without modifying the operation of the other elements of the device, replace on table 3 once again immobile the mold vibrated by a new mold, then gradually reduce the amplitude of the vibrations to the desired value without having to restart the various rotating members.
- the spherical element 20 carried by the underside of the molding table 3 could be fixed and cooperate with the eccentric 17 by means of a needle bearing (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Casting Devices For Molds (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8604681 | 1986-04-02 | ||
FR8604681A FR2596677B1 (fr) | 1986-04-02 | 1986-04-02 | Procede pour l'application de vibrations multidirectionnelles a un support elastique, et appareillage pour la mise en oeuvre de ce procede |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0240425A1 true EP0240425A1 (de) | 1987-10-07 |
EP0240425B1 EP0240425B1 (de) | 1990-09-05 |
Family
ID=9333792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87400703A Expired - Lifetime EP0240425B1 (de) | 1986-04-02 | 1987-03-31 | Verfahren und Vorrichtung zum Mitteilen von Mehrrichtungsschwingungen an eine federnd gestützte Auflage |
Country Status (5)
Country | Link |
---|---|
US (1) | US4929087A (de) |
EP (1) | EP0240425B1 (de) |
DE (1) | DE3764688D1 (de) |
ES (1) | ES2018278B3 (de) |
FR (1) | FR2596677B1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005009095A1 (de) * | 2005-02-22 | 2006-08-31 | Institut für Fertigteiltechnik und Fertigbau Weimar e.V. | Vibrationstisch zur Erzeugung von dreidimensionalen Schwingungen |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5067549A (en) * | 1989-12-04 | 1991-11-26 | General Kinematics Corporation | Compaction apparatus and process for compacting sand |
US5172599A (en) * | 1991-05-15 | 1992-12-22 | Woltering Howard M | Vibratory device |
DE9307761U1 (de) * | 1993-05-22 | 1993-08-19 | Kuston (Deutschland) GmbH, 47533 Kleve | Mischer mit einem Schwingantrieb |
DE9312016U1 (de) * | 1993-08-12 | 1993-10-21 | Berger, Hans-Werner, 22941 Jersbek | Vorrichtung zum Mischen, Schütteln, Rühren und/oder Emulgieren von Flüssigkeiten |
US5988869A (en) * | 1998-07-29 | 1999-11-23 | Pharmacopeia, Inc. | Agitator for orbital agitation |
AU2003254305A1 (en) * | 2002-08-05 | 2004-02-23 | Integrated Biosystems, Inc. | Systems and methods for thawing, mixing, and processing biopharmaceutical materials |
US20070258850A1 (en) * | 2006-05-08 | 2007-11-08 | Miller Leonce J Iii | Heat Transfer System for Retorts and Method Therefore |
US8394335B2 (en) * | 2009-03-06 | 2013-03-12 | Allpax Products Llc | Drive train for agitation of products in batch retorts and related retort system |
WO2013022815A1 (en) | 2011-08-10 | 2013-02-14 | Allpax Products Llc | Retort with progressive latch, roller support arrangement and method and system for reciprocation of loads |
CN102529505B (zh) * | 2011-12-29 | 2014-05-07 | 贝发集团股份有限公司 | 一种用于实现颗粒状饰物均匀灌装的振动机 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE208369C (de) * | ||||
DE537866C (de) * | 1931-11-07 | Erwin Neumann Dr Ing | Ruettelmaschine | |
DE2644034A1 (de) * | 1975-10-01 | 1977-04-14 | Olivier Philippe Dani Bertrand | Schwingungsgenerator mit waehrend des betriebes einstellbarer amplitude, frequenz und arbeitswinkel |
FR2367542A1 (fr) * | 1976-10-12 | 1978-05-12 | Brigolle Roger | Generateur de vibrations, du |
AT353726B (de) * | 1977-11-28 | 1979-11-26 | Gradwohl Adolf | Vorrichtung zum entwaessern von festgut, insbesondere sand |
GB2091377A (en) * | 1981-01-20 | 1982-07-28 | Ortner A Gmbh | Apparatus for draining compact material |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US639404A (en) * | 1899-03-02 | 1899-12-19 | Herman Kolls | Machine for shaking babcock milk-test bottles. |
US949709A (en) * | 1910-01-13 | 1910-02-15 | Jesse A Milligan | Ore-separator. |
US1100852A (en) * | 1913-03-24 | 1914-06-23 | Herwarth Thieme | Barrel-shaker. |
US1437880A (en) * | 1922-05-17 | 1922-12-05 | Joseph Baker Sons & Perkins | Machine for use in the manufacture of confectionery |
US1518236A (en) * | 1922-08-31 | 1924-12-09 | Millard F Hatch | Vibratile screen |
US2086241A (en) * | 1936-02-15 | 1937-07-06 | William A Schaerr | Laboratory shaker |
US2486030A (en) * | 1943-12-21 | 1949-10-25 | Delwin V James | Turning device |
US2755173A (en) * | 1953-12-01 | 1956-07-17 | Vernon W Shore | Apparatus for effecting tests for pullorum and the like |
US3735962A (en) * | 1971-11-23 | 1973-05-29 | Raymond Lee Organization Inc | Automatic jar shaker |
-
1986
- 1986-04-02 FR FR8604681A patent/FR2596677B1/fr not_active Expired - Lifetime
-
1987
- 1987-03-31 ES ES87400703T patent/ES2018278B3/es not_active Expired - Lifetime
- 1987-03-31 EP EP87400703A patent/EP0240425B1/de not_active Expired - Lifetime
- 1987-03-31 DE DE8787400703T patent/DE3764688D1/de not_active Expired - Lifetime
- 1987-04-02 US US07/033,148 patent/US4929087A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE208369C (de) * | ||||
DE537866C (de) * | 1931-11-07 | Erwin Neumann Dr Ing | Ruettelmaschine | |
DE2644034A1 (de) * | 1975-10-01 | 1977-04-14 | Olivier Philippe Dani Bertrand | Schwingungsgenerator mit waehrend des betriebes einstellbarer amplitude, frequenz und arbeitswinkel |
FR2367542A1 (fr) * | 1976-10-12 | 1978-05-12 | Brigolle Roger | Generateur de vibrations, du |
AT353726B (de) * | 1977-11-28 | 1979-11-26 | Gradwohl Adolf | Vorrichtung zum entwaessern von festgut, insbesondere sand |
GB2091377A (en) * | 1981-01-20 | 1982-07-28 | Ortner A Gmbh | Apparatus for draining compact material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005009095A1 (de) * | 2005-02-22 | 2006-08-31 | Institut für Fertigteiltechnik und Fertigbau Weimar e.V. | Vibrationstisch zur Erzeugung von dreidimensionalen Schwingungen |
Also Published As
Publication number | Publication date |
---|---|
ES2018278B3 (es) | 1991-04-01 |
US4929087A (en) | 1990-05-29 |
EP0240425B1 (de) | 1990-09-05 |
FR2596677B1 (fr) | 1990-04-27 |
FR2596677A1 (fr) | 1987-10-09 |
DE3764688D1 (de) | 1990-10-11 |
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