EP1166895A1 - Vibration coating process, particularly for small wooden articles, and articles coated thereby - Google Patents
Vibration coating process, particularly for small wooden articles, and articles coated thereby Download PDFInfo
- Publication number
- EP1166895A1 EP1166895A1 EP00126614A EP00126614A EP1166895A1 EP 1166895 A1 EP1166895 A1 EP 1166895A1 EP 00126614 A EP00126614 A EP 00126614A EP 00126614 A EP00126614 A EP 00126614A EP 1166895 A1 EP1166895 A1 EP 1166895A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- articles
- coating
- tank
- coating material
- vibrating
- 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- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/04—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material
- B05C3/05—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material by applying vibrations thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/02—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
Definitions
- This invention relates to a vibration coating process, particularly for small wooden articles and water-based coating materials, and to the articles coated by said process.
- small articles can be coated by various methods: by spraying, by immersion, by powder, etc. The choice of one of these methods depends on the shape of the articles, their constituent material and the surface appearance which is to be obtained.
- coating means herein the application of transparent coating materials to confer lustre on those articles which would otherwise be opaque.
- Such articles include those of wooden construction.
- wood Given its porous nature and the intrinsic value of its graining, wood always requires treatment with transparent or semi-transparent coloured coating materials, to give the wooden articles a certain colour tone while leaving their typical wooden appearance unaltered.
- An object of the present invention is to define a coating process which reduces the surface "wetting time" by the coating material, in order to reduce its absorption if the surface is of a wooden nature. Another object is to define a coating process which allows uniform distribution of the coating material over the entire surface of the article. Another object is to define a coating process in which operator intervention is reduced to minimum or irrelevant length, especially if the coating relates to small-dimension articles.
- a vibrating tank 1 is lined internally with usual rubbery materials able to prevent damage to the surface of articles 2 which are subjected to collision against the inner surface of the tank by vibration.
- This tank rests on steel springs 3 supported by a fixed structure 4.
- a usual vibrator device 5 which transfers to the tank 1 acceleration suitable for conferring, on the articles 2 contained therein, vibrations appropriate for performing one or more of the following functions:
- the articles could be subjected to vibration along a single axis; however, to achieve stirring suitable for any shape of article 2, the vibrations preferably have suitable components along all the three conventional axes x, y, z.
- the operating principles of the process will be more understood with reference to Figure 2.
- the article 2A tends to change its spatial orientation, so that said region 7 becomes disposed in another position above the level 9 of the coating material 6.
- vibration machines means machines similar to the usual “vibrating screens”.
- tumbling machines comprising a toroidal tank (upperly open), into which the articles are randomly fed, to be subjected to deburring and/or smoothing action by mixing them with abrasive articles of specific shape (generally conical).
- the aforesaid process enables small coated articles to be produced automatically, rapidly and economically, especially wooden articles and especially using water-based coating materials.
- Another advantage of the invention is the use of upperly open tanks on which usual blowers 12 can act to accelerate the drying time of the coating material.
- this process enables water-based coating materials to be used, including an aqueous styrene/acrylic polymer dispersion; or a mixture of natural and esterified mountain waxes containing an ethoxylated alcohol as non-ionic emulsifier, a styrene-acrylic polymer and a silicone anti-foaming agent.
Abstract
Description
- This invention relates to a vibration coating process, particularly for small wooden articles and water-based coating materials, and to the articles coated by said process. As is well known, small articles can be coated by various methods: by spraying, by immersion, by powder, etc. The choice of one of these methods depends on the shape of the articles, their constituent material and the surface appearance which is to be obtained.
- The term "coating" means herein the application of transparent coating materials to confer lustre on those articles which would otherwise be opaque.
- Such articles include those of wooden construction.
- In this respect, given its porous nature and the intrinsic value of its graining, wood always requires treatment with transparent or semi-transparent coloured coating materials, to give the wooden articles a certain colour tone while leaving their typical wooden appearance unaltered.
- As wood has a high capacity for absorbing liquids, its coating process must involve short liquid contact times, to prevent these liquids penetrating deeply and creating shape distortion or surface irregularities. This therefore makes it problematic to use water-based coating materials, making the use of coating materials based on synthetic solvents (toluene, xylene, etc.) inevitable. As these synthetic solvents are extremely toxic, the use of said coating materials involves very high costs connected with the adoption of environmental safeguard procedures and operator health protection. These costs are obviously loaded onto the product, and create loss of competitiveness.
- An object of the present invention is to define a coating process which reduces the surface "wetting time" by the coating material, in order to reduce its absorption if the surface is of a wooden nature. Another object is to define a coating process which allows uniform distribution of the coating material over the entire surface of the article. Another object is to define a coating process in which operator intervention is reduced to minimum or irrelevant length, especially if the coating relates to small-dimension articles. These and further objects will be seen to have been attained on reading the following detailed description of a coating process, particularly for small-dimension wooden articles and water-based coating materials, characterised by placing the articles in a vibrating tank and pouring onto them the coating material in the liquid state, in the quantity necessary for coating the articles, said coating taking place by application deriving from an infinity of small mutual coating transfer contacts between the articles subjected to chaotic free movements and by spreading and/or spraying of coating material droplets deriving from the considerable acceleration to which said articles are subjected by the vibration of the tank.
- The invention is illustrated by way of non-limiting example in the accompanying drawings in which:
- Figure 1 shows schematically generic tank for containing the articles to be coated;
- Figure 2 is a conceptual illustration of the principle of the process.
-
- With reference to the aforesaid Figure 1, a vibrating
tank 1 is lined internally with usual rubbery materials able to prevent damage to the surface ofarticles 2 which are subjected to collision against the inner surface of the tank by vibration. This tank rests onsteel springs 3 supported by afixed structure 4. - On the
tank 1 there is fixed ausual vibrator device 5 which transfers to thetank 1 acceleration suitable for conferring, on thearticles 2 contained therein, vibrations appropriate for performing one or more of the following functions: - a) completely stirring the totality of
articles 2; - b) enabling the excess quantity of coating material, present on the surface of a region of any article, to separate from it.
-
- To obtain said stirring, the articles could be subjected to vibration along a single axis; however, to achieve stirring suitable for any shape of
article 2, the vibrations preferably have suitable components along all the three conventional axes x, y, z. The operating principles of the process will be more understood with reference to Figure 2. By placing on thebase 8 of the tank 1 a certain minimum quantity ofcoating material 6, expressed by alevel 9, it wets a certainminimum surface 7 of a generic article 2A, and adheres abundantly to it, to an extent depending on the viscosity of thecoating material 6. - As a result of a vibrating action of the
base wall 8 and the interference actions exerted by adjacent articles, the article 2A tends to change its spatial orientation, so that saidregion 7 becomes disposed in another position above thelevel 9 of thecoating material 6. - As a result of this the coating material, adhering in abundant quantity to said
immersed region 7, is brought intocontact 14 with non-coated other regions of other adjacent articles, to hence be partially transferred to them. - In this manner, by a multiplicity of accidental contacts, the coating material which initially covered said
surface 7 is gradually removed from this region of the article by the many innumerable random regions of other adjacent articles randomly brought into contact with saidregion 7 by the vibrating motion to which they are subjected by thetank 1. - As a result of this, only a minimum quantity of coating material remains adhering to said
region 7, and can no longer be removed by further accidental contacts. - Extending this concept to all the articles, a mutual exchange of the excess coating material quantities on them is achieved in this manner. In other words, by defining a predetermined quantity of coating material sufficient for "complete minimum coating" of the articles, perfect uniformity of the layer of coating material deposited on them is achieved in this manner.
- Moreover, considering that the vibrations induced on the articles result in their acceleration, it is evident that said acceleration creates forces of inertia which differ according to the mass on which they act. The result of this is that any
drop 13 of coating material resting on a vibrating article 2B separates therefrom and is hence projected away from it in the form ofminuscule droplets 15. As thearticle 2C is adjacent to it, thesedroplets 15 strike said adjacent article, which is therefore coated by them. - Moreover as this impact between droplets and adjacent articles is fairly violent, said droplets undergo flattening by dynamic squashing, this crushing contributing to perfect distribution of the coating material.
- From the point of view of implementation, the process can be implemented by specific tanks, or by usual "vibration machines". The term "vibration machines" means machines similar to the usual "vibrating screens". Alternatively they can be those machines known in the sector as "tumbling machines" comprising a toroidal tank (upperly open), into which the articles are randomly fed, to be subjected to deburring and/or smoothing action by mixing them with abrasive articles of specific shape (generally conical).
- In these usual tumbling machines there are generally three-dimensional vibrations present, which confer on the totality of articles to be processed and on the abrasive pieces a spiral orbital movement providing wide continuous stirring movement within the toroidal (or ring-shaped) form of the vibrating tank. As the process of the invention is suitable for articles which can be of totally different mass and shape, it is not possible to accurately establish the parameters of the acceleration to which the articles must be subjected to achieve the described effects, also because this acceleration depends on the amplitude of the vibrations, which depend on the power of the vibrating machine.
- However, these vibrations are to be considered as lying within the range of said vibrating machines used in other sectors of the art for completely different purposes: i.e. with forcing frequencies generally between 15 and 25 Hz. The provision of a
usual cock 10 on thebase 8 of the tank advantageously enables any excess coating material to be extracted. - Advantageously the aforesaid process enables small coated articles to be produced automatically, rapidly and economically, especially wooden articles and especially using water-based coating materials.
- Another advantage of the invention is the use of upperly open tanks on which
usual blowers 12 can act to accelerate the drying time of the coating material. Advantageously, this process enables water-based coating materials to be used, including an aqueous styrene/acrylic polymer dispersion; or a mixture of natural and esterified mountain waxes containing an ethoxylated alcohol as non-ionic emulsifier, a styrene-acrylic polymer and a silicone anti-foaming agent.
Claims (5)
- A coating process, particularly for small-dimension wooden articles and water-based coating materials, characterised by placing the articles (2) in a vibrating tank (1) and pouring onto them a coating material (6) in the liquid state, in the quantity necessary for coating the articles, said coating taking place by application deriving from an infinity of small mutual coating transfer contacts between the articles (2) subjected to chaotic free movements and by spreading and/or spraying of coating material droplets (15) deriving from the considerable separation acceleration to which said articles are subjected by the vibrations of the tank.
- A process as claimed in the preceding claim, characterised by the use of an upperly open vibrating tank of usual toroidal type, conferring on the articles a spiral motion movement along said toroidal track resulting in wide continuous stirring.
- A process as claimed in the preceding claims, characterised by the supplementary intervention of air blown onto the vibrating articles to facilitate drying of the coating materials.
- A process as claimed in the preceding claims, using a vibrating tank (1) provided with a bottom cock (10).
- Coated articles obtained by the process of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2000BG000024A ITBG20000024A1 (en) | 2000-06-26 | 2000-06-26 | VIBRATION PAINTING PROCEDURE, PARTICULARLY FOR SMALL WOODEN ITEMS AND ITEMS WITH IT PAINTED. |
ITBG000024 | 2000-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1166895A1 true EP1166895A1 (en) | 2002-01-02 |
Family
ID=11437860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00126614A Withdrawn EP1166895A1 (en) | 2000-06-26 | 2000-12-04 | Vibration coating process, particularly for small wooden articles, and articles coated thereby |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1166895A1 (en) |
IT (1) | ITBG20000024A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003074196A2 (en) * | 2002-03-01 | 2003-09-12 | Boston Scientific Limited | Mechanical and acoustical suspension coating of medical implants |
EP1645338A1 (en) * | 2003-06-06 | 2006-04-12 | Intermetallics Co., Ltd. | Adhesive layer forming method |
CN111836917A (en) * | 2018-02-20 | 2020-10-27 | Ap&S国际股份有限公司 | Device for the electroless metallisation of a target surface of at least one workpiece |
CN115069482A (en) * | 2022-07-14 | 2022-09-20 | 青岛中和重工工业有限公司 | Paint dipping equipment and method for anchor chain processing |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1226906B (en) * | 1961-12-14 | 1966-10-13 | Carl Kurt Walther Walter Techn | Vibration processing device |
SU735321A1 (en) * | 1978-11-13 | 1980-05-25 | Предприятие П/Я А-1496 | Apparatus for painting articles by dipping |
JPS61274654A (en) * | 1985-05-29 | 1986-12-04 | Nippon Suisan Kaisha Ltd | Apparatus for smearing food surface with powdery or granular material |
AT393646B (en) * | 1982-06-08 | 1991-11-25 | Deilmann Ag C | METHOD FOR DRINKING A STACK OF WOOD AND WOOD DRINKING DEVICE FOR CARRYING OUT THE METHOD |
US5158804A (en) * | 1987-10-16 | 1992-10-27 | Board Of Trustees Of The University Of Illinois | Particle coating apparatus for small-scale processing |
US5338569A (en) * | 1993-04-14 | 1994-08-16 | Hatch J Mel | Process for coating dowels with water soluble glue |
US5505990A (en) * | 1992-08-10 | 1996-04-09 | Intermetallics Co., Ltd. | Method for forming a coating using powders of different fusion points |
EP0882424A1 (en) * | 1997-05-30 | 1998-12-09 | Hyppocampus S.r.l. | Machine for drying, polishing and burnishing cutlery and metal tableware |
-
2000
- 2000-06-26 IT IT2000BG000024A patent/ITBG20000024A1/en unknown
- 2000-12-04 EP EP00126614A patent/EP1166895A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1226906B (en) * | 1961-12-14 | 1966-10-13 | Carl Kurt Walther Walter Techn | Vibration processing device |
SU735321A1 (en) * | 1978-11-13 | 1980-05-25 | Предприятие П/Я А-1496 | Apparatus for painting articles by dipping |
AT393646B (en) * | 1982-06-08 | 1991-11-25 | Deilmann Ag C | METHOD FOR DRINKING A STACK OF WOOD AND WOOD DRINKING DEVICE FOR CARRYING OUT THE METHOD |
JPS61274654A (en) * | 1985-05-29 | 1986-12-04 | Nippon Suisan Kaisha Ltd | Apparatus for smearing food surface with powdery or granular material |
US5158804A (en) * | 1987-10-16 | 1992-10-27 | Board Of Trustees Of The University Of Illinois | Particle coating apparatus for small-scale processing |
US5505990A (en) * | 1992-08-10 | 1996-04-09 | Intermetallics Co., Ltd. | Method for forming a coating using powders of different fusion points |
US5338569A (en) * | 1993-04-14 | 1994-08-16 | Hatch J Mel | Process for coating dowels with water soluble glue |
EP0882424A1 (en) * | 1997-05-30 | 1998-12-09 | Hyppocampus S.r.l. | Machine for drying, polishing and burnishing cutlery and metal tableware |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Week 198703, Derwent World Patents Index; Class D14, AN 1987-017573, XP002901605 * |
SOVIET INVENTIONS ILLUSTRATED Section PQ Week 198104, 4 March 1981 Derwent World Patents Index; Class P42, XP002901606 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003074196A2 (en) * | 2002-03-01 | 2003-09-12 | Boston Scientific Limited | Mechanical and acoustical suspension coating of medical implants |
WO2003074196A3 (en) * | 2002-03-01 | 2004-02-12 | Scimed Life Systems Inc | Mechanical and acoustical suspension coating of medical implants |
EP1645338A1 (en) * | 2003-06-06 | 2006-04-12 | Intermetallics Co., Ltd. | Adhesive layer forming method |
EP1645338A4 (en) * | 2003-06-06 | 2006-11-02 | Intermetallics Co Ltd | Adhesive layer forming method |
US7354621B2 (en) | 2003-06-06 | 2008-04-08 | Intermetallics Co., Ltd. | Method for forming adhesive layer |
CN111836917A (en) * | 2018-02-20 | 2020-10-27 | Ap&S国际股份有限公司 | Device for the electroless metallisation of a target surface of at least one workpiece |
CN115069482A (en) * | 2022-07-14 | 2022-09-20 | 青岛中和重工工业有限公司 | Paint dipping equipment and method for anchor chain processing |
Also Published As
Publication number | Publication date |
---|---|
ITBG20000024A1 (en) | 2001-12-26 |
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