DE2601018A1 - Nonstick surfaces with vacuum-retained film coating - for containers, tools etc. used in sand processing appts. - Google Patents
Nonstick surfaces with vacuum-retained film coating - for containers, tools etc. used in sand processing appts.Info
- Publication number
- DE2601018A1 DE2601018A1 DE19762601018 DE2601018A DE2601018A1 DE 2601018 A1 DE2601018 A1 DE 2601018A1 DE 19762601018 DE19762601018 DE 19762601018 DE 2601018 A DE2601018 A DE 2601018A DE 2601018 A1 DE2601018 A1 DE 2601018A1
- Authority
- DE
- Germany
- Prior art keywords
- containers
- film
- vacuum
- film coating
- processing appts
- 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
- 239000004576 sand Substances 0.000 title abstract description 3
- 239000007888 film coating Substances 0.000 title 1
- 238000009501 film coating Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract 2
- 239000011888 foil Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/68—Release sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
Verfahren zum Verhindern des Anklebens stark haftender Stoffe anProcedure for preventing strongly adherent materials from sticking to
der Oberfläche von-Behältern, Werkzeugen o.dgl. und Vorrichtung sowie Mittel zur Durchführung des Verfahrens Das Ankleben stark haftender Stoffe an Oberflächen und die damit verbundene Reinigung stellt ein großes Problem in der Technik dar. Trennmittel, die nach den unterschiedlichsten Verfahren auf die Oberfläche aufgebracht werden, können in gewissen Fällen Abhilfe schaffen. Das trifft jedoch nur dann zu, wenn die Haftneigung nicht zu groß ist, und wenn die Schutzschicht nicht durch die Bewegung der haftenden Stoffe zerstört wird.the surface of containers, tools or the like. and device as well Means for carrying out the process The sticking of strongly adhesive substances to surfaces and the associated cleaning is a major problem in technology. Release agents that are applied to the surface using a wide variety of methods can help in certain cases. However, this only applies if if the tendency to stick is not too great, and if the protective layer is not through the Movement of the adhering substances is destroyed.
Bei Mischern, Transportgeräten und Lagerbehältern, wie sie etwa für die Aufbereitung und Verarbeitung von Kernsanden in der Gießereiindustrie eingesetzt werden, reichen lose aufgebrachte Schutzschichten zum Verhindern des Anklebens nicht aus. Solche Schutzschichten werden infolge der Bewegung des Sandes nach kurzer Zeit wrstört, sodaß zwangsweise Verkrustungen an den Oberflächen entstehen.For mixers, transport equipment and storage containers, such as those for used in the preparation and processing of core sands in the foundry industry loosely applied protective layers are not sufficient to prevent sticking the end. Such protective layers become after a short time as a result of the movement of the sand it interferes, so that incrustations are inevitably created on the surfaces.
Besonders Formstoffe mit einem Bindemittel auf Kunstharzbasis, wie Furanharz, neigen sehr stark zum Anhaften. Davon sind auch die Oberflächen von Gießereimodellen stark betroffen. Im Laufe der Zeit bildet sich durch die anhaftenden Sandteile eine rauhe Oberfläche. Diese führt zu einer noch stärkeren Haftneigung und zu unsauberen Form- und Gußstückoberflächen.Especially molding materials with a synthetic resin-based binder, such as Furan resin, have a very strong tendency to stick. This also includes the surfaces of foundry models strong affected. Over time, the adhering sand forms a rough surface. This leads to an even stronger tendency to stick and to unclean Molding and casting surfaces.
Da die bekannten Trennmittel keine befriedigenden Ergebnisse brachten, hat man sich bisher damit begnügt, die Oberflächen der Mischer, Transporteinrichtungen, Lagerbehälter, Modelle o.dgl.Since the known release agents did not produce satisfactory results, So far, one has been content with simply removing the surfaces of the mixers, transport devices, Storage containers, models or the like.
in regelmäßigen Abständen zu säubern. Je nach dem Verschmutzungsgrad ist hierfür ein großer Arbeitsaufwand und ggfs. sogar der Einsatz von Heißdampf oder Säuren erforderlich. Zur Vermeidung von Zeitverlusten kann sogar der abwechselnde Einsatz von doppelten Geräten zweckmäßig sein.to be cleaned at regular intervals. Depending on the degree of pollution is this requires a lot of work and possibly even the use of superheated steam or Acids required. To avoid wasting time, you can even take turns Use of duplicate devices may be appropriate.
Der geschilderte Mangel soll auf möglichst einfache Weise und ohne übermäßigen Aufwand behoben werden.The described defect should be as simple as possible and without excessive effort to be corrected.
Erfindungsgemäß geschieht dieses dadurch, daß auf die saubere Oberfläche eine Folie aufgezogen und durch einen Unterdruck angesaugt wird.According to the invention, this is done in that on the clean surface a film is pulled up and sucked in by a negative pressure.
Im Gegensatz zu einer zerstörbaren Trennschicht oder eine lose aufgelegten Folie führt die angesaugte Folie zu einer einwandfreien Trennung zwischen dem haftenden Stoff und der zu schützenden Oberfläche. Ein Zerstören oder Verrutschen dieser Trennschicht ist bei der üblichen Beanspruchung nicht möglich.In contrast to a destructible separating layer or a loosely applied one Foil leads the sucked in foil to a perfect separation between the adhesive ones Fabric and the surface to be protected. Destruction or slipping of this separating layer is not possible with normal use.
Besonders vorteilhaft ist die Folie deshalb, weil sie sehr dünn ist und sich den Konturen der zu schützenden Oberfläche genau anpaßt. Das macht sie auch zum Schutz von Modellen geeignet, deren Oberfläche ja vom Formstoff genau wiedergegeben werden muß.The foil is particularly advantageous because it is very thin and adapts exactly to the contours of the surface to be protected. She does that Also suitable for protecting models, the surface of which is precisely reproduced by the molding material must become.
Die Berührung mit dem anhaftenden Stoff ist jetzt an die Oberfläche der Folie verlagert, sodaß dieser Stoff evtl. hier ankleben kann. Wegen der Befestigung der Folie an der Oberfläche durch ein Unterdruck ist es jedoch bei Notwendigkeit ohne den geringsten Aufwand möglich, einen Folienwechsel vorzunehmen.The contact with the adhering substance is now on the surface shifted to the foil so that this material can possibly stick here. Because of the fortification the foil on the surface by means of a negative pressure, however, if necessary It is possible to change the foil without the slightest effort.
Der Unterdruck wird aufgehoben, die verschmutzte Folie entfernt, eine neue Folie auf die vollkommen saubere Oberfläche aufgezogen und erneut ein Unterdruck erzeugt. Der Arbeitsaufwand hierfür ist äußerst gering, und der Folienwechsel kannen kürzester Zeit vorgenommen werden, wodurch Ausfall- und Stillstandszeiten entfallen.The vacuum is released, the dirty film is removed, one new film is drawn onto the completely clean surface and a vacuum is applied again generated. The amount of work required for this is extremely low, and you can change the film can be carried out in the shortest possible time, eliminating downtime and downtime.
Durch die Ausbildung und die Zusammensetzung der Folie kann die Verscimutzungsneigung und damit die Häufigkeit des FolienwecIisels reduziert werden. In diesem Sinne wirken eine sehr glatte Folienoberfläche und der Zusatz von Polyurethanfluoräthylen als Trennmittel.The tendency towards contamination can be reduced by the design and composition of the film and thus the frequency of the film change can be reduced. Act in this sense a very smooth film surface and the addition of polyurethane fluorethylene as Release agent.
Die beigefügte Zeichnung stellt in einer einzigen Figur einen Lagerbehälter als Ausführungsbeispiel der Erfindung dar.The attached drawing represents a storage container in a single figure as an embodiment of the invention.
ie Behälterwand 1 ist doppelwandig ausgebildet und schließt einen Spalt 2 als Sammelkanal für die feinen, die Innenwand durchdringenden Luftkanäle 3 ein. Nach außen ist der Sainmelkanal an eine Saugpumpe 4 angeschlossen. Durch den entstehenden Urlterdruck wird eine Folie Sfest gegen die innere Behälterwand gesaugt, sodaß diese gegen das Ankleben des stark haftenden Stoffes6 :#esc}iLjtzt ist.ie the container wall 1 is double-walled and includes one Gap 2 as a collecting duct for the fine air ducts that penetrate the inner wall 3 a. The Sainmelkanal is connected to a suction pump 4 on the outside. By the resulting primary pressure is a film S firmly against the inner container wall sucked, so that it prevents the strongly adhesive material from sticking6: #esc} iLjtzt is.
Die stärke der Folie, die Anzahl und Größe der feinen Luftkanäle, die bildung des Sammelkanales und die benötigte Saugkraft sind durch Versuche leicht zu bestimmen.The thickness of the film, the number and size of the fine air ducts, The formation of the collecting channel and the required suction force are easy through experiments to determine.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762601018 DE2601018A1 (en) | 1976-01-13 | 1976-01-13 | Nonstick surfaces with vacuum-retained film coating - for containers, tools etc. used in sand processing appts. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762601018 DE2601018A1 (en) | 1976-01-13 | 1976-01-13 | Nonstick surfaces with vacuum-retained film coating - for containers, tools etc. used in sand processing appts. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2601018A1 true DE2601018A1 (en) | 1977-07-21 |
Family
ID=5967357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762601018 Pending DE2601018A1 (en) | 1976-01-13 | 1976-01-13 | Nonstick surfaces with vacuum-retained film coating - for containers, tools etc. used in sand processing appts. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2601018A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3004361A1 (en) * | 1979-02-07 | 1980-08-21 | Olin Corp | PROCESS FOR SKI PRODUCTION |
| WO1983003792A1 (en) * | 1982-04-30 | 1983-11-10 | Lindskog K J E | A mould part and a method in its manufacture and use |
| DE3731088A1 (en) * | 1987-09-16 | 1989-04-06 | Fehrer Gummihaar | Process for producing mouldings from plastic |
| WO1999001270A1 (en) * | 1997-07-03 | 1999-01-14 | Polifen Kimya Sanayi Ve Ticaret A.S. | Method of casting and producing ath filled acrylic or polymethacrylate based molded articles by using protecting polyethylene foil in the mold |
| DE19731780A1 (en) * | 1997-07-24 | 1999-01-28 | Inst Mikrotechnik Mainz Gmbh | Sensitive microcomponent manufacture to give flawless surface quality |
-
1976
- 1976-01-13 DE DE19762601018 patent/DE2601018A1/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3004361A1 (en) * | 1979-02-07 | 1980-08-21 | Olin Corp | PROCESS FOR SKI PRODUCTION |
| WO1983003792A1 (en) * | 1982-04-30 | 1983-11-10 | Lindskog K J E | A mould part and a method in its manufacture and use |
| DE3731088A1 (en) * | 1987-09-16 | 1989-04-06 | Fehrer Gummihaar | Process for producing mouldings from plastic |
| WO1999001270A1 (en) * | 1997-07-03 | 1999-01-14 | Polifen Kimya Sanayi Ve Ticaret A.S. | Method of casting and producing ath filled acrylic or polymethacrylate based molded articles by using protecting polyethylene foil in the mold |
| DE19731780A1 (en) * | 1997-07-24 | 1999-01-28 | Inst Mikrotechnik Mainz Gmbh | Sensitive microcomponent manufacture to give flawless surface quality |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OGA | New person/name/address of the applicant | ||
| OD | Request for examination | ||
| OHW | Rejection |