EP0224406B1 - Schwingungstisch, insbesondere verwendet in der Giesserei - Google Patents
Schwingungstisch, insbesondere verwendet in der Giesserei Download PDFInfo
- Publication number
- EP0224406B1 EP0224406B1 EP86402388A EP86402388A EP0224406B1 EP 0224406 B1 EP0224406 B1 EP 0224406B1 EP 86402388 A EP86402388 A EP 86402388A EP 86402388 A EP86402388 A EP 86402388A EP 0224406 B1 EP0224406 B1 EP 0224406B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vibrating table
- vibrators
- plate
- central axis
- unbalance
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/10—Compacting by jarring devices only
Definitions
- the present invention relates to a vibrating table used in particular in foundries for obtaining rigid moldings by compacting sand (FR-A-967437).
- the object of the invention is to avoid such risks by appropriate use of vibrations, while ensuring proper and simultaneous operations of filling and compacting the sand.
- a vibrating table of the type comprising vibrators fixed to a frame, and a horizontal plate secured to this frame and isolated from the base thereof by shock absorbers.
- this vibrating table includes two vibrators whose unbalance axes are arranged parallel to the vertical reference plane of the plate, which passes through the central axis thereof, and symmetrically to this central axis.
- the offset of these unbalance axes relative to this vertical reference plane is used as an adjustment parameter for the clamping (rigidity of the mold) and the distribution (filling) of the sand, without any deformation of the model.
- this vibrating table comprises two vibrators 1, 2 solidly fixed on a rigid frame 3.
- a horizontal plate 4 integral with this frame is designed to receive a mold to be produced 5.
- This plate is isolated from the frame 3 by shock absorbers 6 sufficiently dimensioned.
- the vibrators 1, 2 are strictly situated at the same level defined by a horizontal plane H. They respectively have unbalance axes B, B '(FIG. 2) arranged parallel to the vertical reference plane P of the plate 4 which passes through the central axis X thereof, on the one hand, and symmetrically to this central axis, on the other hand.
- the offset D of the unbalance axes of rotation becomes an adjustment parameter for clamping and distributing the sand, which is defined as a function of the part to be molded, as is the direction of rotation of the vibrators 1, 2.
- the power of the corresponding motors is related to the load to be vibrated.
- the support plate 4 of the mold 5 is equipped with a clamping device, not shown, the characteristics of which depend on the shape and dimensions of this mold.
- the shock absorbers 6 can be mechanical (springs) or pneumatic (tires).
- FIG. 1 In FIG. 1 are shown the centrifugal forces F which are exerted on the respective vibrators 1,2 rotating in opposite directions with an average offset D.
- centrifugal forces F are located in the vertical planes passing through the unbalance axes B, B ', parallel to the plane P.
- the vertical components F "add up and determine a vertical vibratory amplitude.
- Each horizontal component F ' is broken down into two other components F 1 and F2 by projection onto the vertical plane V passing through the central axis X and the unbalance centers C, C' ( Figure 2).
- the two components F 1 not contained in this plane V form a horizontal couple.
- the vibrating table previously described thus makes it possible to adapt the vibration to the type of part to be produced, by varying only the offset D of the vibrators 1, 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8516028A FR2589093B1 (fr) | 1985-10-29 | 1985-10-29 | Table vibrante utilisee notamment en fonderie |
FR8516028 | 1985-10-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0224406A1 EP0224406A1 (de) | 1987-06-03 |
EP0224406B1 true EP0224406B1 (de) | 1988-06-01 |
Family
ID=9324293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86402388A Expired EP0224406B1 (de) | 1985-10-29 | 1986-10-24 | Schwingungstisch, insbesondere verwendet in der Giesserei |
Country Status (4)
Country | Link |
---|---|
US (1) | US4796685A (de) |
EP (1) | EP0224406B1 (de) |
DE (1) | DE3660234D1 (de) |
FR (1) | FR2589093B1 (de) |
Families Citing this family (6)
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 |
US5606231A (en) * | 1993-12-04 | 1997-02-25 | Netter Gmbh | Vibrating table for masses to be compacted and a vibratory method of compaction for the compaction of concrete |
US6105433A (en) * | 1999-03-02 | 2000-08-22 | Qualmark Corporation | Shaker table assembly for a reliability test chamber utilizing different types of vibrator assemblies |
US6112596A (en) * | 1999-03-02 | 2000-09-05 | Qualmark Corporation | Shaker table assembly for a test chamber |
DK1741068T3 (da) * | 2004-04-20 | 2009-09-14 | Rampf Formen Gmbh | Indretning til overvågning og styring eller regulering af en maskine |
CN102717034B (zh) * | 2012-04-27 | 2014-10-29 | 安徽中兴华汉机械有限公司 | 一种振实台 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR967437A (fr) * | 1948-06-08 | 1950-11-03 | Vibro Betong Ab | Dispositif vibrateur pour obtenir un effet vibratoire dirigé au moyen d'organes vibrateurs tournants |
US3274660A (en) * | 1960-10-17 | 1966-09-27 | Builders Equip Co | Slump block producing machine |
FR1291621A (fr) * | 1961-03-14 | 1962-04-27 | Dalaudiere Ets | Perfectionnements apportés aux appareils vibrants |
US3767168A (en) * | 1970-05-18 | 1973-10-23 | Nat Foundry Equipment Co Inc | Mechanical agitation apparatus |
CA1177221A (en) * | 1980-12-04 | 1984-11-06 | General Kinematics Corporation | Vibratory method for packing foundry sand into a pattern prior to the pouring of molten metal |
US4340469A (en) * | 1981-01-23 | 1982-07-20 | Spokane Crusher Mfg. Co. | Vibratory screen apparatus |
-
1985
- 1985-10-29 FR FR8516028A patent/FR2589093B1/fr not_active Expired
-
1986
- 1986-10-22 US US06/921,408 patent/US4796685A/en not_active Expired - Fee Related
- 1986-10-24 DE DE8686402388T patent/DE3660234D1/de not_active Expired
- 1986-10-24 EP EP86402388A patent/EP0224406B1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0224406A1 (de) | 1987-06-03 |
FR2589093B1 (fr) | 1987-12-11 |
US4796685A (en) | 1989-01-10 |
FR2589093A1 (fr) | 1987-04-30 |
DE3660234D1 (en) | 1988-07-07 |
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