EP0070914A1 - Procédé et dispositif pour sabler un objet - Google Patents

Procédé et dispositif pour sabler un objet Download PDF

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Publication number
EP0070914A1
EP0070914A1 EP81105913A EP81105913A EP0070914A1 EP 0070914 A1 EP0070914 A1 EP 0070914A1 EP 81105913 A EP81105913 A EP 81105913A EP 81105913 A EP81105913 A EP 81105913A EP 0070914 A1 EP0070914 A1 EP 0070914A1
Authority
EP
European Patent Office
Prior art keywords
sandblasting
turbine wheels
blasting chamber
blasting
conveying direction
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.)
Withdrawn
Application number
EP81105913A
Other languages
German (de)
English (en)
Inventor
Manfred Heinreich
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.)
Msi Malerei Schiffs- und Industrieanlagen-Instandsetzungs & Co KG GmbH
Original Assignee
Msi Malerei Schiffs- und Industrieanlagen-Instandsetzungs & Co KG 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 Msi Malerei Schiffs- und Industrieanlagen-Instandsetzungs & Co KG GmbH filed Critical Msi Malerei Schiffs- und Industrieanlagen-Instandsetzungs & Co KG GmbH
Priority to EP81105913A priority Critical patent/EP0070914A1/fr
Publication of EP0070914A1 publication Critical patent/EP0070914A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces

Definitions

  • the invention relates to a method for sandblasting an object with the aid of a sandblasting agent striking the object at high speed, which is accelerated in the direction of surfaces of the object to be cleaned.
  • the invention relates to a device for sandblasting an object with the aid of a sandblasting agent striking the object at high speed, which is accelerated in the direction of surfaces of the object to be cleaned.
  • Sandblasting for the purpose of cleaning metallic surfaces with the aim of preparing them for the application of preservation layers is generally known.
  • systems have become known in which the objects are sandblasted by machine.
  • a turbine which throws the sandblasting agent onto the object is guided around a container whose surfaces are to be sandblasted.
  • This system has the significant disadvantage that the guide of the turbine causes considerable difficulties, since the guide members ß the surface of the need to sample to sand radiating body to adhere to a substantially uniform distance from the radiating surfaces to sand.
  • the tracking of the sandblasting agent is difficult because. the supply of the respective position of the turbine must be adjusted.
  • the object of the present invention is therefore to improve the method of the type mentioned in the introduction so that the object to be sandblasted is treated in one operation in such a way that at the end all surface parts to be preserved are adequately prepared for the application of the preservation layers.
  • This object is achieved according to the invention in that the object is first dried in one operation and then guided in a controlled pass through a blasting chamber in which the sandblasting agent is thrown onto the object in a constant direction which is adapted to the surface design of the object, and then manually aftertreated spray-blasting grit and cleaned finally by an L uftvorhang of residues of the blasting agent.
  • the turbine wheels can be exposed to high speeds and high throughputs of sandblasting media due to their permanently installed axes. This makes it possible, on the one hand, to achieve an excellent cleaning effect with relatively few turbine wheels and, on the other hand, to subject the object to be cleaned with a large feed to the cleaning process. Due to the arrangement of the turbine wheels tailored to the special needs of the surface to be cleaned, it is also achieved that the individual parts of the surface are largely cleaned even in the consistently oriented sandblast, so that only because of small surface parts there is the need to clean them with a manually sprayed sandblast agent to treat. Since manual post-treatment is relatively expensive, the entire process is also made considerably cheaper in this way.
  • a device for sandblasting an object with the aid of a sandblasting agent striking the object at high speed, which is accelerated in the direction of surfaces of the object to be cleaned characterized in that two blasting stations are arranged one behind the other in the conveying direction of the object , of which the first has jets fixedly aligned to the object and the second is provided with connections for manually steered sprayers for post-treatment of the surfaces.
  • This design of the sandblasting stations makes them particularly effective in terms of the quick and easy transportation of the sandblasting unit. Subject. This is driven through the individual stations without having to go through intermediate stations. The ways are short and the door-like closures that lie between the individual sandblasting stations can be easily designed. If parts of the sandblast used in the first sandblasting station actually get into the second sandblasting station, they can be removed from it without any problems, such as the sand which is produced in the second sandblasting station by the sandblasting.
  • the individual sandblasting stations can be connected to one another in terms of control technology in such a way that the use of one of the two blasting stations only makes it possible to use the other under certain restrictions or not at all.
  • the method according to the invention is expediently carried out in a system in which a pretreatment room 1, a first blasting chamber 2 and a second blasting chamber 3 are arranged one behind the other in the conveying direction 4 of an object 5 which is to be sandblasted.
  • Rails 6, 7, on which a carriage 8 are guided, extend through the blasting chambers 2 and 3. This serves to convey the object 5 through the two blasting chambers 2, 3.
  • the carriage 8 can also be pulled through the pretreatment room 1 with the aid of an underfloor conveyor, the coupling of which passes through a slot 9 extending through the center of the pretreatment room 1 in the direction of protrudes through the carriage 8.
  • two underfloor conveyors are provided, which are connected via couplings to wheels of the carriage 8, which roll on the rails 6, 7.
  • the article 5 is dried in the pretreatment room 1.
  • air nozzles 10 are provided which are directed towards the object 5 moving through the pretreatment room 1. Preheated air is blown through these air nozzles 10 in the direction of the object, so that it dries during the passage through the pretreatment space 1.
  • the pretreatment room 1 can be viewed as a storage space in which the articles 5 are to be parked and have to wait until the preceding article 5 in the blasting chamber 2 has been sandblasted and has left it in the direction of the second blasting chamber 3.
  • a lock 11 is arranged between the pretreatment room 1 and the first blasting chamber 2. This has a door opening 13 in the direction of the pretreatment room 1. This door opening 13 can be closed with a sliding door 12. It is also between the blasting chamber. 2 and the; Lock 11 provided an opening 14 which in turn can be closed by a gate 15. This gate 15 is open when the object 5 moves out of the lock 11 into the blasting chamber 2. During this time, a sliding door 12 is closed, which closes the door opening 13 from the pretreatment room 1.
  • the lock 11 is closed at the bottom by a floor 16.
  • a floor 16 In the area of a wall 17 which closes the lock 11 opposite the first blasting chamber 2, openings 18 are provided in the bottom through which there is access to a collecting chamber 19.
  • This collecting chamber 19 also has access through openings 20 which are provided in a base 21 which closes the first blasting chamber 2 from the collecting chamber 19.
  • This floor 21 expediently consists of gratings, through the openings 20 of which the blasting agent can fall, which falls from the body 5 in the direction of the floor 21 after sandblasting.
  • turbine wheels 22, 23, 24, 25 are rotatably mounted in a side wall 26 on axes 27, 28, 29, 30. These turbine wheels 22, 23, 24, 25 are driven at high speeds by drive motors 31.
  • the turbine wheels 22, 23, 24, 25 are supplied with sandblasting media via feed lines 32. This is accelerated by the turbine wheels and hurled in the direction of the object 5.
  • the turbine wheels 22, 23, 24, 25 are fastened on their axes 27, 28, 29, 30 in the side wall 26 in such a way that the sandblasting agent leaving the turbine wheels 22, 23, 24, 25 hits the object 5 at a predetermined angle .
  • the size of this angle 33 is determined by commands 34 which are attached to at least one of the surfaces 35 of the object 5.
  • These contours 34 can be, for example, ribs that extend over a side surface of a container. In this training example, the angle 33 is determined so that the ribs are hit by the sandblast from all sides.
  • turbine wheels 92 93 are fastened in a side wall 39 opposite the side wall 26. Also in this side wall 39, two pairs of turbine wheels 92, 93 are fastened to one another, of which only the upper pair is shown in the illustration in FIG. 7.
  • the attachment of the turbine wheels 92 93 is adapted to that chosen for the opposite turbine wheels 22 23, 24, 25.
  • the angle 33 is expediently chosen such that the turbine wheels 22, 23, 24, 25; 92, 93 leaving rays 40, 41 and 42, 43 meet at a point 44, 45, each of which a pair of rays 40, 41; 42, 43 is assigned.
  • These points 44, 45 expediently lie in the region of the side walls 46 of the object 5 assigned to them.
  • turbine wheels 47, 48, 49, 50 are arranged in a ceiling 51, 52 of the first blasting chamber 2. These turbine wheels 47, 48, 49, 50 direct their rays 53, 54, 55, 56 in the direction of a side wall 46 forming the upper end of the object 5.
  • the turbines wheels 47, 48, 49, 50 mounted on axes 57, 58, 59, 60, which extend substantially transversely to the conveying direction 4.
  • the axes 57, 58, 59, 60 are inclined with respect to the horizontal plane, so that the beams 53, 55; 54, 56 meet at an angle 61 which lies in the path of the object 5.
  • the axes 57, 58, 59, 60 form angles 62 with the conveying direction 4.
  • the turbine wheels 47, 48, 49, 50 are positioned relative to the conveying direction 4, which means that the jets 53, 54 leaving the turbine wheels , 55, 56 meet approximately in the middle of the first blasting chamber 2.
  • the beams 54, 56; 53, 55 each included an angle 63, the size of which is selected depending on the contours 34 which are built up on the side wall 46 closing the object 5 upwards.
  • the object 5 is post-treated at all points that were not hit by jets 53, 54, 55, 56 in the first blasting chamber 2 with the aid of a manually operated blasting nozzle 64.
  • This jet nozzle 64 is guided along the locations of the object 5 that were in the impact shadow of the rays 53, 54, 55, 56.
  • 3 air connections 65 are provided in the second jet chamber, to which the jet nozzle 64 is connected, depending on the point at which a jet 66 leaving the jet nozzle 64 should strike the object 5 . ;
  • the air connections 65 are expediently on longitudinal walls; 67, 68 along the second blasting chamber 3.
  • the second blasting chamber 3 is closed with respect to the first blasting chamber 2 with swing gates 69. These swing gates 69 open as soon as the object 5 moves into the area of limit switches which are fitted within the first blasting chamber 2. Only after. That the object 5 is perfect is retracted into the second jet chamber 3 and the S chwenk- gates 69 are closed again, the work can be received in the second jet chamber. 3
  • a contact base 70 is formed in the area of the pivoting gates 69, upon which the blasting medium is fed to the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 is interrupted.
  • a contact base 71 which is arranged in the region of the door opening 13 within the pretreatment room 1, works in a similar manner.
  • the second blasting chamber 3 has at its end opposite the pivoting gates 69 articulated gates 72 which block an exit 73 from which the finished sandblasted object 5 moves out of the entire system onto its carriage 8.
  • the object 5 passes under air distribution arms 74, which are provided with air nozzles 75 at their adjacent ends. These air nozzles 75 are directed towards the object 5 passing under the air distribution arms 74.
  • the air distribution arms 74 are mounted in swivel joints. Around these ends 76, 77, the air distribution arms 74 are pivoted in the direction of the longitudinal walls 67, 68 if an air jacket is not desired. If there is to be sprayed with air against the object 5, the air distribution arms 74 are pivoted in the direction of a center line extending through the second blasting chamber 3, so that the air flowing out of the air nozzles 75 now flows around the object 5 on all sides.
  • a collecting pit 78 is also provided in the region of the second blasting chamber 3, into which the blasting medium falls after it has blasted out of blasting nozzles 64 Direction had been sprayed onto the item 5. From this collecting pit 78, the blasting medium is transported in the direction of the collecting chamber 19, from which the reusable portions of the already used blasting medium are recovered.
  • Ankop p are not actuated safety devices illustrated, which prevent the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 can be put into operation. These turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 only start if the safety devices have been actuated beforehand during the coupling process.
  • a further lock is provided, which makes the start of the sandblasting process dependent on the carriage 8 being coupled to the pull chains 81, 82.
  • the drives 31 of the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 already switched on. They run at a switch-on level up to a certain initial speed at which they remain for a predetermined period of time.
  • This time period is based on the resilience of the public supply network. After this period of time, the drives 31 run up to the operating speed which is necessary for the beams 53, 54, 55, 56; 40, 41, 42, 43 with the energy required for sandblasting to hurl at object 5.
  • the sliding door 12 is opened so that the object 5 can move into the lock 11.
  • a fter the opening of the door 15 moves the object 5 on the carriage 8 in the first jet chamber 2.
  • the gate 15 as far as at all possible brought up to the object 5, to prevent that parts of the sand-blasting agent from the first jet chamber 2 penetrate into the pre-treatment room 1. If the sandblasting agent penetrates the lock 11 during the sandblasting, it can be swept out of the lock 11 through the openings 18 into the collecting chambers 19.
  • touch switches (not shown) are touched by the object 5. These touch switches switch the supply of the abrasive to the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 a. Now the blasting agent is turned over the rotating turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 hurled onto object 5.
  • the speed of the carriage 8 is controlled in such a way that the object has rays 40, 41, 42, 43, 53, 54, 55, 56 on its front and rear end faces is exposed longer than in the area of its central side walls or ceiling walls 46.
  • the object 5 moves on the carriage 8 through pivoting gates 69 into the second blasting chamber 3.
  • the pivoting gates 69 can also be replaced by a curtain of movable rubber flags be pushed aside under the pressure of the object 5 moving into the second blasting chamber 3.
  • the first blasting chamber 2 is closed off from the second blasting chamber 3 by the pivoting gates 69.
  • An aftertreatment of the object 5 can now be carried out in the second blasting chamber 3.
  • 85 jet nozzles 64, which are connected to air connections 65 via hoses 86, are directed onto the object 5 by the jet person a1 . Good lighting with the help of very bright lighting fixtures ensures that the areas not previously hit by the sandblasting can be quickly recognized and processed well.
  • the work routine is to be determined in such a way that the object 5 can be conveyed from the first blasting chamber 2 into the second blasting chamber 3 when the aftertreatment of the preceding object 5 in the second blasting chamber 3 has just ended and the blasting personnel 85 has left the second blasting chamber 3 .
  • the doors which close the access to the second blasting chamber 3 are locked, so that during the use of the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 no one can enter the second blasting chamber 3. Only after the object 5 has passed the swivel gates 69 over its entire length and the swivel gates 69 have closed the first blasting chamber 2 again can the doors to the second blasting chamber 3 be opened again.
  • the object 5, which has been treated in the second blasting chamber 3, is moved in the direction of the outlet 73.
  • the air distribution arms 74 are pivoted in the direction of the object 5 passing beneath them, so that strong air jets can emerge from the air nozzles 75, with the help of which the remnants of the sandblasting agent remaining on the object 5 are blown off to be able to.
  • the contact floors 70, 71 are additionally provided. When entering these contact floors 70, 71, the supply of blasting media to the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 immediately.
  • the jet direction of the turbine wheels 22, 23, 24, 25; 53, 54, 55, 56 does not change during operation.
  • the blasting agent falling from the object 5 during the blasting process falls through the openings 18, 20 into the collecting chamber 19 and is transported from there via conveyors 87 to a reprocessing station (not shown), in which it is partly reprocessed and partly not usable is filtered out.
  • Switching on the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 occurs after a start-up routine adapted to the respective object 5. This depends on which part of the object 5 is initially in the jet region of the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50. So it has proven to be expedient, when sandblasting containers, first of all the turbine wheels lying in the conveying direction 4. 22, 24 to turn on. Only throw after the front end face of the container has reached the jet area of the rear two turbine wheels 23, 25 this their rays towards the container. Similarly, the turbine wheels 49, 50; 47 48 switched.
  • the object 5 is expediently so on the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 passed that the rays 40, 41, 42, 43; 53, 54, 55, 56 intersect in the area of the surface 35.
  • Rays 40, 41, 42, 43; 53, 54, 55, 56 can, however, also be steered such that their point of intersection would lie behind the surface 35 of the object 5, so that the beams 40, 41, 42, 43; 53, 54, 55, 56 hit surface 35 before their intersection.
  • the arrangement of the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 in the side walls 26 and the ceilings 51, 51 is provided so that the angle of incidence of the beams 40, 41, 42, 43; 53, 54, 55, 56 of the respective surface 35 of the object 5 is adapted.
  • the incident angle can with which the beams 40, 41, 42, 43; 53, 54, .55, 56 impinge on the surface 35, be aligned more or less steeply.
  • the distance between the turbine wheels 22, 23, 24, 25; 47, 48, 49, 50 and the side walls 46 of the article 5 play a significant role.
  • the blasting chamber 2 is lined with manganese plates in order to protect the walls against damage in view of the high energy of the sandblasting agent.
  • the energy of the sandblasting agent is lower, so that this blasting chamber 3 is lined with rubber coverings.
  • the carriage 8 is expediently driven with a chain conveyor installed under the floor.
  • a chain conveyor installed under the floor.
  • an underfloor conveyor which is articulated in the middle of the carriage 8 is sufficient.
  • Two chain conveyors are used in the area of the rails 6, 7 in order to be able to ensure a uniform feed over the entire width of the carriage.
  • the use of a chain conveyor is recommended in order to ensure that the object 5 is transported smoothly.
  • a working pit 89 is provided below the floor 16. This is covered with rust 90. Connections 91 are installed in the working pit 89, so that the jet nozzles 64 can also be directed from the working pit 89 onto the object 5. In this way it is ensured that the article 5 can also be post-treated from below in the second blasting chamber 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP81105913A 1981-07-27 1981-07-27 Procédé et dispositif pour sabler un objet Withdrawn EP0070914A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81105913A EP0070914A1 (fr) 1981-07-27 1981-07-27 Procédé et dispositif pour sabler un objet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81105913A EP0070914A1 (fr) 1981-07-27 1981-07-27 Procédé et dispositif pour sabler un objet

Publications (1)

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EP0070914A1 true EP0070914A1 (fr) 1983-02-09

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EP81105913A Withdrawn EP0070914A1 (fr) 1981-07-27 1981-07-27 Procédé et dispositif pour sabler un objet

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0712694A1 (fr) * 1994-10-11 1996-05-22 G.M.P. Poliuretani S.r.l. Installation automatique de traitement des surfaces de produits
NL1015092C2 (nl) * 2000-05-02 2001-11-05 Constructiewerkplaats G C Gr N Samenstel en werkwijze voor het stralen van een metaalproduct.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652245B (fr) *
US1347195A (en) * 1918-01-05 1920-07-20 Weller Charles Workshop ventilation
US2337048A (en) * 1941-09-03 1943-12-21 Pangborn Corp Abrading apparatus
FR901360A (fr) * 1943-09-07 1945-07-25 Andre Sisson Ets Machine pour traiter des objets au moyen de jets d'abrasifs, notamment en vue de leur décapage
US2510927A (en) * 1946-11-15 1950-06-06 Pangborn Corp Work blasting method and machine
CH375247A (de) * 1959-05-15 1964-02-15 Wheelabrator Corp Schleuderstrahl-Putzmaschine
US3407719A (en) * 1967-04-28 1968-10-29 Zero Mfg Company Blast room with uniform down-draft ventilation
DE2212487A1 (de) * 1971-03-31 1972-10-12 Fischer Ag Georg Verfahren und Haengebahn-Schlcuderstrahlmaschine zur Oberflaechenbehandlung von Werkstuecken
DE2251570B2 (de) * 1971-12-01 1976-05-06 Werkstueckhalterung an einer schleuderstrahlmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652245B (fr) *
US1347195A (en) * 1918-01-05 1920-07-20 Weller Charles Workshop ventilation
US2337048A (en) * 1941-09-03 1943-12-21 Pangborn Corp Abrading apparatus
FR901360A (fr) * 1943-09-07 1945-07-25 Andre Sisson Ets Machine pour traiter des objets au moyen de jets d'abrasifs, notamment en vue de leur décapage
US2510927A (en) * 1946-11-15 1950-06-06 Pangborn Corp Work blasting method and machine
CH375247A (de) * 1959-05-15 1964-02-15 Wheelabrator Corp Schleuderstrahl-Putzmaschine
US3407719A (en) * 1967-04-28 1968-10-29 Zero Mfg Company Blast room with uniform down-draft ventilation
DE2212487A1 (de) * 1971-03-31 1972-10-12 Fischer Ag Georg Verfahren und Haengebahn-Schlcuderstrahlmaschine zur Oberflaechenbehandlung von Werkstuecken
DE2251570B2 (de) * 1971-12-01 1976-05-06 Werkstueckhalterung an einer schleuderstrahlmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Neue Fachberichte Huttenpraxis Metallweiterverarbeitung, Band 14, Nr. 10 Oktober 1976 Coburg U. WAHLEN "Automatische Konservierungslinien fur Walzstahl" seiten 977 bis 979 *seiten 977 bis 978* *
Industrie-Lackier-Betrieb, Band 43, Nr. 6 Juni 1975 Hannover F. RUB "Strahl- und Beizanlagen zum Entrosen und Entzundern" seiten 204 bis 207 *seiten 204 bis 206* *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0712694A1 (fr) * 1994-10-11 1996-05-22 G.M.P. Poliuretani S.r.l. Installation automatique de traitement des surfaces de produits
NL1015092C2 (nl) * 2000-05-02 2001-11-05 Constructiewerkplaats G C Gr N Samenstel en werkwijze voor het stralen van een metaalproduct.

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