EP0264597B1 - Dosiervorrichtung für Bindemittel - Google Patents

Dosiervorrichtung für Bindemittel Download PDF

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Publication number
EP0264597B1
EP0264597B1 EP87112864A EP87112864A EP0264597B1 EP 0264597 B1 EP0264597 B1 EP 0264597B1 EP 87112864 A EP87112864 A EP 87112864A EP 87112864 A EP87112864 A EP 87112864A EP 0264597 B1 EP0264597 B1 EP 0264597B1
Authority
EP
European Patent Office
Prior art keywords
vessel
dosing device
mixer
pressure
float
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 - Lifetime
Application number
EP87112864A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0264597A3 (en
EP0264597A2 (de
Inventor
Joachim Dipl.-Ing. Laempe
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.)
Dipl-Ing Laempe Firma GmbH
Original Assignee
Dipl-Ing Laempe Firma 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 Dipl-Ing Laempe Firma GmbH filed Critical Dipl-Ing Laempe Firma GmbH
Priority to AT87112864T priority Critical patent/ATE49360T1/de
Publication of EP0264597A2 publication Critical patent/EP0264597A2/de
Publication of EP0264597A3 publication Critical patent/EP0264597A3/de
Application granted granted Critical
Publication of EP0264597B1 publication Critical patent/EP0264597B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
    • B01F35/8822—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances using measuring chambers of the piston or plunger type
    • 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
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/0472—Parts; Accessories; Controlling; Feeding; Discharging; Proportioning

Definitions

  • the invention relates to a metering device for binding agents intended for mixing with core sand in foundries, with a storage container for the binding agent and a conveying device, wherein a metering quantity of the binding agent selectable by means of a metering device connected via pressure and suction lines between the storage container and mixer is conveyed by means of the conveying device is transferred from the storage container to the mixer, preferably by pressure or gravity.
  • Such a metering device is known from DE-U 7 246 462, the binder being added via a metering pump designed as a piston pump, the cylinder of which thus forms a metering vessel.
  • the dosage can be adjusted by changing the piston stroke or the number of piston strokes.
  • this known dosage of binder for Kemsand in foundries has certain disadvantages.
  • the sealing surfaces of the pump valves come into contact with the aggressive binder and can therefore become leaky in the long run.
  • the sliding surfaces of the piston in the cylinder can be attacked by the binder. Leakages caused by this cause air to be sucked in, making the metering inaccurate.
  • the suction line is empty or leaky and air will flow into the delivery chamber. In this case, too, the exact dosage is disturbed as long as the pump is not vented or the suction line is not sealed.
  • a continuously operated mixing container for foundry sand is known from DE-A 1 783 081, in which the binder is supplied by gravity.
  • Pneumatically actuated valves are provided in the lines as metering devices, so that the accuracy of the metering depends on the accuracy of the operation of these valves.
  • the solution to this problem is that the storage container and mixer are connected via valves to a metering vessel with an adjustable fill level limiter and that at least one suction source and one pressure source are connected to the metering vessel via a valve.
  • a vacuum can be generated in the metering vessel by a suction pump, so that it fills via the suction line from the storage container to the amount set with the level limiter. By generating excess pressure, this precisely metered amount can then be fed to the mixer via a pressure line and its valve.
  • Another advantage of the solution according to the invention is that the suction or pressure pump no longer comes into direct contact with the medium. Damage to the pump from chemically aggressive or mechanically tough or sticky binders is practically impossible from the outset.
  • the level limiter has a float as a signal transmitter and at least one sensor, sensor or the like as a signal recording device. It proves to be expedient if the float consists at least in part of permanent magnetic material and the signal recording device consists of at least one electromagnetically sensitive sensor. Thus, even during the measuring process, i.e. H. a mechanically mediated signal transmission can be dispensed with when the level is limited. Impairment of the level measurement by the chemically aggressive properties of the binder are therefore practically impossible.
  • the float expediently consists of titanium at least on its surface. This reliably prevents the risk of corrosion of the swimming surface.
  • the pressure or suction source is expediently connected to the fill level limiter.
  • the suction or pressure process can be controlled automatically.
  • High dosing accuracy can be achieved in particular by using high dosing vessels with a narrow cross-section.
  • the metering vessel which is preferably made of plastic, therefore expediently has a tubular cross section with a diameter of at most about 20 to 50 mm and a height of at least 0.2 to 1.0 m.
  • the single figure shows a system diagram of a metering device according to the invention with a metering vessel partially cut open and shown in perspective.
  • a metering device designated as a whole by 1, has a storage container 2 for the binder 3, which is transferred to a mixer 5 via a conveying device 4. Conveying device 4 and dosing device 1 form in the shown Embodiment a uniform system.
  • a metering vessel 6 which has an adjustable fill level limiter 7 consisting of several elements.
  • the metering vessel 6 is connected to the suction pump 10 or the pressure pump 11 via pressure 8 or suction lines 9.
  • the pump 10 is switched to the venting nozzle 13 via the valve 12 and in this way generates a negative pressure in the line 9.
  • Electromagnetic sensors 19 are attached to the outside of the metering vessel 6, which react to the change in the electromagnetic field by the float 18 and in this way measure at the level of the float 18 and thus the level of the fill level. They can be calibrated in a known manner so that they trigger a switching function when a fill level corresponding to their setting is reached and close the valve 15. In this way, any pre-set level in the dosing vessel can be reached.
  • the closure of the valve 15 can be coupled with an opening of the valve 20, via which compressed air or gas reaches the metering container 6 through the pressure pump 11.
  • the valve 17 When the valve 17 is closed and the valve 16 is open, the binder is conveyed from the metering vessel to the mixer 5.
  • the binder 3 does not come into contact with mechanically moving parts of the pump system. Therefore, the accuracy of the dosing process can practically not be impaired by pump malfunctions, as was the case with conventional systems.
  • the pumps 10, 11 are rather decoupled from the actual metering process and cannot be attacked by the chemically aggressive binder. In this way, a great accuracy of the dosage is possible.
  • a possible leakage of lines does not lead to a change in the dosing accuracy - as long as the suction or pressure process is not completely paralyzed - since the line functions are also decoupled from the dosing mechanism.
  • the entire system is therefore less susceptible to faults and more precise and also has a longer service life.
  • Floats 18 and electromagnetic sensors 19 of the level limiter 7 can also be replaced by other systems. It is possible e.g. a determination of the fill level by induction loops wound around the metering vessel. In this case there is no need for a float.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Accessories For Mixers (AREA)
EP87112864A 1986-10-18 1987-09-03 Dosiervorrichtung für Bindemittel Expired - Lifetime EP0264597B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112864T ATE49360T1 (de) 1986-10-18 1987-09-03 Dosiervorrichtung fuer bindemittel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863635539 DE3635539A1 (de) 1986-10-18 1986-10-18 Dosiervorrichtung fuer bindemittel
DE3635539 1986-10-18

Publications (3)

Publication Number Publication Date
EP0264597A2 EP0264597A2 (de) 1988-04-27
EP0264597A3 EP0264597A3 (en) 1988-07-20
EP0264597B1 true EP0264597B1 (de) 1990-01-10

Family

ID=6312010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112864A Expired - Lifetime EP0264597B1 (de) 1986-10-18 1987-09-03 Dosiervorrichtung für Bindemittel

Country Status (6)

Country Link
US (1) US4828461A (enrdf_load_stackoverflow)
EP (1) EP0264597B1 (enrdf_load_stackoverflow)
AT (1) ATE49360T1 (enrdf_load_stackoverflow)
DE (2) DE3635539A1 (enrdf_load_stackoverflow)
ES (1) ES2012379B3 (enrdf_load_stackoverflow)
GR (1) GR3000411T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110253711A (zh) * 2019-07-30 2019-09-20 辽宁森远增材制造科技有限公司 喷墨式3d打印机固化剂供液系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945955A (en) * 1988-03-23 1990-08-07 Burr-Brown Corporation Hazardous waste removal devices
DE4206477C2 (de) * 1992-03-02 1996-05-09 Blachowski Aribert Anordnung einer Dosiervorrichtung für z. B. einen flüssigen Katalysator zum Aushärten von Kernsand in einer Kernsand-Gießerei
US5664699A (en) * 1995-04-04 1997-09-09 Simpson Technologies Corporation Core sand preparation apparatus
FR2743750A1 (fr) * 1996-01-22 1997-07-25 Canon Kk Procede et dispositif de determination de la quantite de produit present dans un reservoir, notamment d'encre dans un dispositif de transfert d'image
CN1089298C (zh) * 1996-01-22 2002-08-21 佳能株式会社 确定图象形成装置墨水容器中存在的墨水量的方法和装置
JP3710230B2 (ja) 1996-10-04 2005-10-26 キヤノン株式会社 インク検出方法、およびインクジェット記録装置
US6224345B1 (en) * 1999-03-22 2001-05-01 Bijur Lubrication Corporation pressure/vacuum generator
ES1046844Y (es) * 2000-07-17 2001-07-01 Innovacio Tecnologica Catalana Inyector-dosificador volumetrico proporcional.
EP2659995A4 (en) * 2012-03-23 2015-10-28 Loramendi S Coop DRIP VALVE FOR A SANDING MIXER
US10280063B2 (en) 2016-02-19 2019-05-07 Alexander G. Innes Pressurized transfer device
EP2803425A1 (en) * 2013-05-13 2014-11-19 Loramendi, S.COOP. Dosage apparatus and operating method for a dosage apparatus
CN103575366B (zh) * 2013-11-14 2016-04-06 中国神华能源股份有限公司 液体介质注满度检测装置
ES1100161Y (es) 2014-01-14 2014-05-08 Loramendi S Coop Aparato dosificador de aglomerante para un proceso de fabricación de núcleos de arena
CN104192786B (zh) * 2014-07-31 2017-04-26 安徽欣创节能环保科技股份有限公司 一种用于焦炉煤气输送系统防腐、除垢化学处理的添加剂添加装置及其使用方法
US10184496B2 (en) * 2016-12-06 2019-01-22 Airgas, Inc. Automatic pressure and vacuum clearing skid method
US10864640B1 (en) 2017-12-26 2020-12-15 AGI Engineering, Inc. Articulating arm programmable tank cleaning nozzle
US11031149B1 (en) 2018-02-13 2021-06-08 AGI Engineering, Inc. Nuclear abrasive slurry waste pump with backstop and macerator
US11413666B1 (en) 2018-02-13 2022-08-16 AGI Engineering, Inc. Vertical travel robotic tank cleaning system
US10786905B1 (en) 2018-04-16 2020-09-29 AGI Engineering, Inc. Tank excavator
US11577287B1 (en) 2018-04-16 2023-02-14 AGI Engineering, Inc. Large riser extended reach sluicer and tool changer
CA3103177A1 (en) 2018-06-11 2019-12-19 Alex G. Innes Programmable railcar tank cleaning system
US11267024B2 (en) 2018-06-11 2022-03-08 AGI Engineering, Inc. Programmable tank cleaning nozzle
US11571723B1 (en) 2019-03-29 2023-02-07 AGI Engineering, Inc. Mechanical dry waste excavating end effector

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US1323864A (en) * 1919-12-02 Arnold h
DE7246462U (de) * 1974-05-30 Michel H Vorrichtung zum Dosieren der Bindemittelzugaben bei der Herstellung von Sandformen und -kernen für Giessereizwecke
US2141427A (en) * 1937-08-03 1938-12-27 Raymond W Bryant Compressed air operated pump
US2400651A (en) * 1944-08-04 1946-05-21 Gresham & Craven Ltd Liquid elevating apparatus
US3005417A (en) * 1957-04-26 1961-10-24 United States Steel Corp Pneumatic system for pumping liquid
US3430929A (en) * 1967-11-16 1969-03-04 Southington Mfg Inc Continuous operation mulling apparatus and method for accurately proportioning foundry sand ingredients
US3556682A (en) * 1968-08-12 1971-01-19 Hitachi Ltd Apparatus for liquid displacement transfer
DE2262254A1 (de) * 1972-12-20 1974-06-27 Michel Horst Werner Verfahren und vorrichtung zum dosieren der bindemittelzugaben bei der herstellung von sandformen und -kernen fuer giessereizwecke
US3861830A (en) * 1973-09-17 1975-01-21 Ronald D Johnson Pressure differential pumping system for dry bulk products
JPS5523368A (en) * 1978-08-07 1980-02-19 Seiko Kakoki Kk Air pressure pump
EP0011339B1 (fr) * 1978-11-21 1983-06-22 Jean Massaux Dispositif de régulation pour pompes volumétriques
CH654755A5 (en) * 1981-12-18 1986-03-14 Werner Lueber Dosing appliance for a core-sand processing plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110253711A (zh) * 2019-07-30 2019-09-20 辽宁森远增材制造科技有限公司 喷墨式3d打印机固化剂供液系统

Also Published As

Publication number Publication date
ES2012379B3 (es) 1990-03-16
EP0264597A3 (en) 1988-07-20
US4828461A (en) 1989-05-09
DE3761354D1 (de) 1990-02-15
EP0264597A2 (de) 1988-04-27
ATE49360T1 (de) 1990-01-15
DE3635539C2 (enrdf_load_stackoverflow) 1989-09-28
GR3000411T3 (en) 1991-06-28
DE3635539A1 (de) 1988-04-28

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