EP3750642A1 - Vorrichtung und verfahren zum reinigen von lackierspindeln für fahrzeugräder - Google Patents

Vorrichtung und verfahren zum reinigen von lackierspindeln für fahrzeugräder Download PDF

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Publication number
EP3750642A1
EP3750642A1 EP20179834.5A EP20179834A EP3750642A1 EP 3750642 A1 EP3750642 A1 EP 3750642A1 EP 20179834 A EP20179834 A EP 20179834A EP 3750642 A1 EP3750642 A1 EP 3750642A1
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EP
European Patent Office
Prior art keywords
spindles
conveyor
cleaning chamber
nozzles
chambers
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.)
Granted
Application number
EP20179834.5A
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English (en)
French (fr)
Other versions
EP3750642B1 (de
Inventor
Patric Pedruzzi
Marco Pierluigi PIZZAMIGLIO
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.)
Olpiduerr SpA
Original Assignee
Olpiduerr SpA
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Publication date
Application filed by Olpiduerr SpA filed Critical Olpiduerr SpA
Publication of EP3750642A1 publication Critical patent/EP3750642A1/de
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Publication of EP3750642B1 publication Critical patent/EP3750642B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B08B5/023—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor

Definitions

  • the invention relates to a device and a method for cleaning painting spindles, known in technical jargon as "stakes", which are used to support wheel rims while the wheel rims themselves undergo powder coating operations, to which, in particular, light alloy wheel rims are subjected.
  • Wheel rims normally consist of an outer ring, which is U-shaped in radial section an on which, in use, the tyres are mounted, of an intermediate part, which usually consists of a plurality of radial spokes, and of a central annular element or hub, which is delimited by a front annular surface, which, in use, comes into contact with the wheel hub unit of the vehicle and needs to remain as raw as possible in order to allow for a good friction coupling to the wheel hub unit.
  • vehicle wheel rims and, in particular, wheel rims made of light alloys need to be painted and the painting process most commonly used is powder coating, during which powder paint is sprayed against the rim and then cured.
  • This type of painting process is carried out supporting each rim by means of a respective spindle, which consists of a stem provided, at an upper end thereof, with a conical head projecting from a plate or flange and, at a lower end thereof, with a holding device, which is configured to engage a conveyor, usually a belt or chain conveyor.
  • a respective spindle which consists of a stem provided, at an upper end thereof, with a conical head projecting from a plate or flange and, at a lower end thereof, with a holding device, which is configured to engage a conveyor, usually a belt or chain conveyor.
  • Each wheel rim is laid on the plate or flange by means of the front annular surface of the central annular element, which engages, with a radially inner side wall thereof, the conical head, so that the outer ring or "rim” is supported in a radially projecting manner by the spindle, together with the spokes.
  • each spindle is coupled to a conveyor, the wheel rims are caused to go through a painting cabin, where they are painted, in order to then be cured.
  • the spindles receive a part of the paint as well, which, despite not perfectly adhering to them, dirties them to such an extent that they absolutely need to be cleaned in order to remove residues of powder paint before being used in a new painting process.
  • the object of the invention is to provide a device and a method for cleaning painting spindles for the support of wheel rims, which are not affected by the drawbacks of the prior art and, in particular, allow for quick treatments, have small usage costs and small dimensions and ensure a high safety of use, in particular when it comes to the risk of explosions, as well as a high cleaning efficiency.
  • number 1 indicates, as a whole, a device for cleaning painting spindles 2.
  • the spindles 2 are used, in a known manner, to support wheel rims during a wheel rim powder coating operation. During this operation, the spindles receive part of the powder paint, which, hence, needs to be removed after the painting operation.
  • the cleaning device 1 comprises a conveyor 3, which is configured to engage and transport a plurality of spindles 2 arranged in sequence along a predetermined trajectory, in the non-limiting example shown herein a straight trajectory.
  • the device 1 further comprises a casing 4, which is made of a fireproof plastic material coated with a sheet metal cover, so as to avoid the build-up of electrostatic charges coming from the environment where it is installed, and delimits, on the inside, a cleaning chamber 5 ( figure 5 ), through which the conveyor 3 is arranged in such a way that, in use, the spindles 2 travel, in sequence, through the cleaning chamber 5 along the aforesaid predetermined direction, which is defined by a longitudinal development of the conveyor 3, which is straight.
  • a casing 4 which is made of a fireproof plastic material coated with a sheet metal cover, so as to avoid the build-up of electrostatic charges coming from the environment where it is installed, and delimits, on the inside, a cleaning chamber 5 ( figure 5 ), through which the conveyor 3 is arranged in such a way that, in use, the spindles 2 travel, in sequence, through the cleaning chamber 5 along the aforesaid predetermined direction, which is defined by a longitudinal development of the conveyor 3, which is straight
  • the device 1 also comprises a plurality of nozzles 6, which are arranged inside the cleaning chamber 5 and are oriented towards the conveyor 4 and the spindles 2 transported by it.
  • the nozzles 6 ( figure 7 ) have a fan shape, are flat and are each supported by a swivelling joint 7, which, in turn, is supported by the casing 4, so that they can be oriented according to the single needs. Generally speaking, they are oriented, thanks to the swivelling joints 7, so as to copy, on a same side of the spindles 2, a peripheral cross profile of the spindles 2 themselves. Furthermore, the nozzles 6 can be provided with brushes 8 ( figure 3 ), which are configured to cooperate in contact, in use, with the spindles 2.
  • the device 1 finally comprises a compressed air feeding plant 9 to feed compressed air to the nozzles 6, which is provided with a tank 10, which is housed in the casing 4, under the cleaning chamber 5.
  • the device 1 comprises a first pre-chamber 11 and a second pre-chamber 12, which are delimited by the casing 4 and are arranged in series to the cleaning chamber 5, said pre-chambers 11, 12 being crossed in series by the conveyor 3 ( figure 5 ).
  • the first pre-chamber 11 is arranged in the area of an inlet opening 13 of the cleaning chamber 5, with which it is in hydraulic communication, and is provided, in turn, with an inlet slit 14, which is crossed by the conveyor 3.
  • the second pre-chamber 12 is arranged in the area of an outlet opening 15 of the cleaning chamber 5, with which it is in hydraulic communication, and is provided, in turn, with an outlet slit 16, which is crossed by the conveyor 3.
  • the inlet 13 and outlet 15 openings of the cleaning chamber 5 are each closed by at least one pair of flexible and elastically deformable first squeegee blades/brushes or straps 18 ( figure 3 ), which are made of a preferably non-sparking and fireproof synthetic or elastomer plastic material, such as a polyamide 6 filled with a flame retardant, are arranged side by side, adjacent or overlapped, are shaped like brushes or foils and are configured to cooperate in contact with each one of the spindles 2 so as to be deformed by them while the spindles 2 cross the inlet and outlet openings 13, 15 and, at the same time, brush the spindles 2.
  • a preferably non-sparking and fireproof synthetic or elastomer plastic material such as a polyamide 6 filled with a flame retardant
  • the inlet and outlet slits 14, 16 of the pre-chambers 11, 12 are each provided, on the other hand, with a respective air curtain double seal C1, C2 ( figure 5 ), which is provided/created, for example, by respective nozzles 19 ( figures 5 and 8 ).
  • the cleaning chamber 5 and the pre-chambers 11, 12 are connected, in the area of respective lower ends thereof, 20 for the chamber 5 and 21 for the pre-chambers 11, 12 ( figures 3 , 5 ), with an air suction plant 22 ( figures 2 , 4 ), which is also part of the device 1.
  • the plant 22 is configured to suck a quantity of air which is greater than the one introduced into the chamber 5 by the nozzles 6.
  • the plant 22 is sized so as to suck an air volume ranging from 2500 to 4000 m 3 /h, hence significantly greater than the one fed to the nozzles 6, namely produced by the plant 9.
  • the chambers 5, 11 and 12 are substantially kept under vacuum.
  • the cleaning chamber 5 ( figures 4 and 7 ) is divided into an upper compartment 23 and a lower compartment defining/making up the lower end 20 of the cleaning chamber 5.
  • the upper compartment 23 is delimited, at the bottom, by a respective first bottom wall 24 and the lower compartment 20 is delimited, at the bottom, by a second bottom wall 25.
  • the bottom walls 24, 25 are inclined towards respective first and second suction mouths, indicated with 26 and 27 respectively ( figure 7 ), of the air suction plant 22, which is connected both to the lower compartment 20 through the second suction mouths 27 and to the upper compartment 23 through the first suction mouths 26, which preferably have larger dimensions.
  • the first bottom wall 24 divides the upper compartment 23 from the lower compartment or end 20 of the chamber 5 and is provided with a longitudinal slit 28 ( figures 4 and 7 ), which faces the conveyor 3 along the entire longitudinal extension of the bottom wall 24.
  • the longitudinal slit 28 is closed by a pair of flexible and elastically deformable second squeegee blades 29, which are made of a synthetic or elastomer plastic material, are arranged side by side, adjacent or overlapped, are shaped like brushes or foils and are configured to cooperate in contact, in use, with respective stems 30 ( figure 8 ) of each one of the spindles 2 so as to be deformed by them while the spindles 2 travel through the cleaning chamber 5.
  • second squeegee blades 29 which are made of a synthetic or elastomer plastic material, are arranged side by side, adjacent or overlapped, are shaped like brushes or foils and are configured to cooperate in contact, in use, with respective stems 30 ( figure 8 ) of each one of the spindles 2 so as to be deformed by them while the spindles 2 travel through the cleaning chamber 5.
  • the conveyor 3 is housed inside and through the lower compartment or end 20 so as to be screened by the second squeegee blades 29 and is arranged immediately above the bottom wall 25.
  • the cleaning chamber 5 is also provided, on the inside, directly above the longitudinal slit 28, with at least one brush 31, which is made of a non-sparking synthetic or elastomer plastic material, is arranged parallel to the conveyor 3 and is configured to cooperate, in use, in contact with the stems 30 of each one of the spindles 2 in order to remove from them possible residues of powder paint.
  • the cleaning chamber 5 is separated into two adjacent parts by a partitioning wall 32 ( figures 5 and 6 ) and, in this case, the chamber 5 houses two brushes 31, which are arranged in series aligned with one another, one for each part of the chamber 5.
  • the lower ends 21 of the pre-chambers 11, 12 are delimited by a third bottom wall 33 and by a fourth bottom wall 34 respectively ( figure 2 ), which are inclined towards a respective third suction mouth 35 and fourth suction mouth 36 ( figure 2 ) of the air suction plant 22.
  • the lower ends 21 of the pre-chambers 11, 12 are further crossed, in a through manner, by the conveyor 3, which is arranged immediately above the third and fourth bottom wall 33, 34.
  • both the inlet slit 14 and the outlet slit 16 of the pre-chambers 11, 12 each comprise a first upper portion 37, which is shaped so as to reproduce a cross-size profile of the spindles 2, and a second lower portion 38, which is configured so as to receive, going through it, the conveyor 3.
  • the casing 4 is provided, on the outside, with a pair of screens 39 arranged side by side, which are configured to reproduce, together, a cross-size profile of the conveyor 3.
  • the screens 39 are carried by the casing 4 in a transversely movable manner and so that they can be locked in a plurality of different positions by means of fastening elements 40, which are also carried by the casing 4, on the outside, so that a same casing 4 can receive, going through the pre-chambers 11, 12 and the cleaning chamber 5, conveyors 3 of different widths.
  • the nozzles 6 are arranged in the cleaning chamber 5 divided into two benches 41, 42 of nozzles, each bench 41, 42 of nozzles consisting of a plurality of, preferably three, vertical lines 43 ( figures 1 and 7 ) of nozzles 6 aligned with one another, which are defined by respective straight pipes feeding the nozzles 6 of each line.
  • the vertical lines 43 of nozzles 6 are spaced apart from one another in a forward direction A of the conveyor 3 (indicated by the arrow in figure 1 ) with a predetermined pitch and the two benches 41, 42 of nozzles 6, in turn, are spaced apart from one another with one pitch in the forward direction A of the conveyor 3.
  • a compressed air feeding pipe 44 which is part of the compressed air feeding plant 9 and is connected to an air manifold 45, which is arranged parallel to the conveyor 3 and on the outside of the cleaning chamber 5, on the outside of the casing 4.
  • Each one of the vertical lines 43 of nozzles 6 is connected in parallel to the air manifold 45 by means of first pneumatic valves 46, one for each line 43 of nozzles.
  • the nozzles 6 of each vertical line 43 are preferably divided into two groups by means of respective second pneumatic valves 47 ( figures 1 , 4 and 7 ), one for each line 43 of nozzles 6; the nozzles 6 of a first upper group are housed inside the compartment 23 and the ones of a second lower group of nozzles are housed in the lower compartment 20 of the cleaning chamber 5.
  • the upper compartment 23 is configured to house, in use, an upper portion 48 ( figure 8 ) of the spindle 2 consisting of a head 49, which is provided with a (known) spindle centring cone, and of the stem 30, and the lower compartment or end 20 is configured to house, in use, a lower portion 50 ( figure 8 ) of the spindles 2, which is configured in a known manner not described herein for the sake of simplicity, is suited to be coupled to the conveyor 3 and, for the reason explained below, is provided with a toothed flange 51.
  • the second group or lower group of nozzles 6 of each vertical line 43 of nozzles 6 is configured to blow air directly above the lower portion 50 of the spindles 2 and at least one nozzle 6 of this second group or lower group of nozzles 6 of each vertical line 43 is configured to blow air directly above the toothed flange 51.
  • the conveyor 3 is longitudinally provided with a stationary rack 52 ( figure 8 ), which is configured to engage, in use, the toothed flange 51 of each spindle 2 so as to cause the spindles 2 to rotate on themselves while they move along the conveyor 3, at least along the cleaning chamber 5 and, more in general, also while they move along the pre-chambers 11 and 12.
  • the pitch with which the vertical lines 43 of nozzles 6 are spaced apart from one another is chosen/configured so that the first bench 41 of nozzles 6 is configured to blow compressed air on three first angular sectors S1 of the spindles 2 (the sectors S1 being schematically shown in a graphic manner for greater clarity in figure 2 ) during a first complete rotation of the spindles 2, whereas the second bench 42 of nozzles is configured to blow compressed air on three second annular sectors S2 ( figure 2 ) of the spindles 2 during a second complete rotation of the spindles 2.
  • the angular sectors S2 are adjacent to the angular sectors S1 and cover, together with them, a 360° angle (round angle), so that each spindle 2 is hit by the compressed air emitted by a vertical line 43 of nozzles 6 successively on a non-adjacent series of specific angular sectors thereof, at first (in the example shown herein) the three sectors S1 and then the three sectors S2.
  • the rotation of the spindles 2 must be synchronized based on the number of vertical lines 43 of nozzles 6 available.
  • the cleaning device 1 preferably comprises, furthermore, at least a first track 53 and a second longitudinal track 54, preferably at least a pair of lower tracks 52 and one, or a pair, of upper tracks 54.
  • the tracks 53 and 54 are arranged parallel to the conveyor 3 and face one another.
  • the second track 54 is arranged in a through manner along respective upper ends of the pre-chambers 11, 12 and of the cleaning chamber 5, said upper end being defined by the compartment 23, and the first track 53 is arranged in a through manner along the lower ends 21 of the pre-chambers 11, 12, and end 20 of the cleaning chamber 5, immediately above the conveyor 3.
  • the tracks 53 and 54 are configured to cooperate, in use, with the spindles 2 so as to vertically push them towards the conveyor 3 and keep the spindles 2 stable in a substantially vertical position while they cross the cleaning chamber 5 and said pre-chambers 11, 12.
  • the tracks also allow the spindle centring cone of the heads 49 to be pressed so as to extract the powder that could deposit on the inside.
  • the pair of lower tracks 53 cooperates in a sliding manner with a disc 55 ( figure 8 ), which is part of the lower portion 50 of each spindle 2, whereas the single track or the pair of tracks 54 cooperates in a sliding manner with the head 49 of each spindle 2, specifically with the spindle centring cone of the head 49.
  • the casing 4 is made of a fireproof plastic material divided into three prefabricated elements, one single upper element 4b, which is shell-shaped, and two lower elements 4c, which have the shape of a half-shell ( figure 2 ).
  • the invention also relates to a method for cleaning painting spindles 2 used to support wheel rims while being painted, said cleaning method comprising the steps of:
  • the brushes used like the brush 31, only have to perform a finishing task, the cleaning being mainly carried out by the nozzles 6 by means of compressed air, which is then sucked in a much greater quantity than the air introduced, so as to keep the inside of the chambers 5, 11 and 12 under vacuum, the air sucked by the plant 22 being compensated by the inlet of ambient air, since the chambers 11, 12 and 5 are not airtight.

Landscapes

  • Cleaning In General (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
EP20179834.5A 2019-06-14 2020-06-12 Vorrichtung und verfahren zum reinigen von lackierspindeln für fahrzeugräder Active EP3750642B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000009030A IT201900009030A1 (it) 2019-06-14 2019-06-14 Dispositivo e metodo per la pulizia di mandrini di verniciatura per ruote di veicoli

Publications (2)

Publication Number Publication Date
EP3750642A1 true EP3750642A1 (de) 2020-12-16
EP3750642B1 EP3750642B1 (de) 2023-04-26

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EP (1) EP3750642B1 (de)
IT (1) IT201900009030A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113245300A (zh) * 2021-05-13 2021-08-13 山东和乐门业有限公司 一种板材除尘设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114011615B (zh) * 2021-11-05 2022-12-23 郑州航空工业管理学院 一种汽车制造用车身喷涂智能机器人

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837037A (en) * 1972-07-25 1974-09-24 Crown Cork & Seal Co High pressure water impact spraying system for magnetic can hangers
GB1543439A (en) * 1977-08-23 1979-04-04 Cope Whelon & Co Ltd Washing unit
WO2001053000A2 (de) * 2000-01-21 2001-07-26 Gerd Wurster Pulverbeschichtungsanlage und beschichtungsverfahren
DE102010032143A1 (de) * 2010-07-24 2012-01-26 Eisenmann Ag Anlage zur Oberflächenbehandlung von Gegenständen
DE102016103941A1 (de) * 2016-03-04 2017-09-07 Bridgewater Simeitis GbR (Vertretungsberechtigte Gesellschafter: Kent Bridgewater, 28777 Bremen, Sven Simeitis, 28777 Bremen) Reinigungssystem für eine Kette oder dgl. sowie Verfahren hierzu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837037A (en) * 1972-07-25 1974-09-24 Crown Cork & Seal Co High pressure water impact spraying system for magnetic can hangers
GB1543439A (en) * 1977-08-23 1979-04-04 Cope Whelon & Co Ltd Washing unit
WO2001053000A2 (de) * 2000-01-21 2001-07-26 Gerd Wurster Pulverbeschichtungsanlage und beschichtungsverfahren
DE102010032143A1 (de) * 2010-07-24 2012-01-26 Eisenmann Ag Anlage zur Oberflächenbehandlung von Gegenständen
DE102016103941A1 (de) * 2016-03-04 2017-09-07 Bridgewater Simeitis GbR (Vertretungsberechtigte Gesellschafter: Kent Bridgewater, 28777 Bremen, Sven Simeitis, 28777 Bremen) Reinigungssystem für eine Kette oder dgl. sowie Verfahren hierzu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113245300A (zh) * 2021-05-13 2021-08-13 山东和乐门业有限公司 一种板材除尘设备

Also Published As

Publication number Publication date
EP3750642B1 (de) 2023-04-26
IT201900009030A1 (it) 2020-12-14

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