DE2058564A1 - Process for determining the degree of purity of regenerated sands, in particular molding sands - Google Patents
Process for determining the degree of purity of regenerated sands, in particular molding sandsInfo
- Publication number
- DE2058564A1 DE2058564A1 DE19702058564 DE2058564A DE2058564A1 DE 2058564 A1 DE2058564 A1 DE 2058564A1 DE 19702058564 DE19702058564 DE 19702058564 DE 2058564 A DE2058564 A DE 2058564A DE 2058564 A1 DE2058564 A1 DE 2058564A1
- Authority
- DE
- Germany
- Prior art keywords
- sands
- purity
- degree
- regenerated
- determining
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000000465 moulding Methods 0.000 title 1
- 239000004576 sand Substances 0.000 claims description 8
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 230000005021 gait Effects 0.000 claims 1
- 239000003110 molding sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
Verfahren zur Festlegung des Reinheitsgrads von regenerierten Sanden. insbesondere Forinsanden.Procedure for determining the degree of purity of regenerated sands. especially forinsands.
Bisher wurde der Reinheitsgrad von regenerierten Sanden sachlich durch Feststellen der Menge von abschwemmbaren Stoffen mit Hilfe der Normprüfung festgelegt. Ein Nachteil dieses Verfahrens liegt im Arbeitsaufwand, in der Langwierigkeit und der Unmöglichkeit, das Ergebnis als ein Signal fUr eine automatische Steuerung des Betriebes der Regeneriervorrichtung zu benützen.So far, the degree of purity of regenerated sands has been factually determined Determination of the amount of substances that can be washed away with the help of the standard test. A disadvantage of this method is the amount of work involved, the length of time and the impossibility of using the result as a signal for automatic control of the Operation of the regeneration device.
Bei Regeneration des erneut verwendbaren Formsandes kommt es zum Abrieb der haftengebliebenen kleinen Teile des totgebrannten Bindungsmittels, der Zusatzstoffe, des Staubes u.dgl., wodurch der ursprUngliche graue Farbton des regenerierbaren Sandes sich in einen helleren Farbton ändert.When the reusable molding sand is regenerated, abrasion occurs the remaining small parts of the dead-burned binding agent, the additives, of the dust, etc., whereby the original gray hue of the regenerable Sand changes to a lighter shade.
Das Messen des Graugrades der Oberfläche des Sandes im Vergleich zu dem Tone des vollkommen gereinigten Sandes ergibt den Reinheitsgrad des regenerierten Sandes.Measuring the degree of grayness of the surface of the sand compared to The clay of the completely cleaned sand determines the purity of the regenerated one Sand.
Die Nachteile der bisherigen Festlegung der Reinheit der regenerierten Sande beseitigt aer Gegenstand der Erfindung. Das Wesen der Erfindung besteht darin, daß der Reinheitsgrad durch Ermitteln der Menge des von dem regenerierten Sand reflektierten Lichtes gemessen wird. Die Menge des zuruckgeworfenen Lichtes kann zur automatischen Gangregelung der Regenerativvorrichtung benutzt werden.The disadvantages of the previous definition of the purity of the regenerated Sands are eliminated from the subject matter of the invention. The essence of the invention is that the degree of purity by determining the amount of reflected from the regenerated sand Light is measured. The amount of reflected light can be adjusted automatically Gear regulation of the regenerative device can be used.
Ein Maß für den Grad des Graus des regenerierbaren Formsandes aus der Gießerei für Stahlgußstücke ergibt sich vor der Regeneration, gemessen mit der zugehörigen, etwa einen Fotowiderstand und ein WiderstandsmeBgerät zum Ermitteln des Widerstandswertes des Fotowiderstandes enthaltenden Vorrichtung, zu etwa 1) kl und dieselbe Probemenge des Sandes ergibt nach Reinigung auf Grund der normalisierten Schwemmprüfung den Wert 9 kfl. Das Verhältnis dieser Werte genügt zur objektive Bewertung des Reinheitsgrades der Sandoberfläche. Das gewonnene elektrische Signal kann bei Einschaltung eines Servomechanismus zur automatischen Steuerung der Regeneriervorrichtung angewendet werden.A measure of the degree of gray of the regenerable molding sand of the foundry for steel castings results before the regeneration, measured with the associated, such as a photo resistor and a resistance measuring device for determining of the resistance value of the device containing the photoresistor, to about 1) kl and the same sample amount of the sand results after cleaning on the basis of the normalized Flood test the value 9 kfl. The ratio of these values to the objective one is sufficient Assessment of the degree of purity of the sand surface. The electrical signal obtained can be activated when a servomechanism is activated to automatically control the regeneration device be applied.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS785169 | 1969-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2058564A1 true DE2058564A1 (en) | 1971-06-24 |
Family
ID=5428383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702058564 Pending DE2058564A1 (en) | 1969-11-28 | 1970-11-27 | Process for determining the degree of purity of regenerated sands, in particular molding sands |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2058564A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3121928A1 (en) * | 1981-06-03 | 1982-12-23 | Chemische Werke Hüls AG, 4370 Marl | METHOD FOR DETECTING AND ELIMINATING AGED PLASTIC OBJECTS NO LONGER USED |
-
1970
- 1970-11-27 DE DE19702058564 patent/DE2058564A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3121928A1 (en) * | 1981-06-03 | 1982-12-23 | Chemische Werke Hüls AG, 4370 Marl | METHOD FOR DETECTING AND ELIMINATING AGED PLASTIC OBJECTS NO LONGER USED |
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