DE2926997A1 - MACHINE FOR APPLYING TOUGH-LIQUID OR PASTOUS COATINGS TO PLATES - Google Patents

Description

The present invention relates to a machine for Application of varnishing products to flat surfaces, especially for wooden panels and the like.

As is known per se, in the manufacture of wooden furniture, the finishing of the same is done using varnishing Products such as paints and the like, e.g. polyester, are very common. To apply these varnishing products that hereinafter referred to as lacquers for short, it is already known per se, so-called "pour lacquer or veil machines" to use. These machines apply a veil of lacquer to the wooden panels that run through them.

These curtain machines require a high solvent content and therefore both pollute the work area as well as the busier atmosphere. This demands about it

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In addition, a high expenditure for the pollution reduction serving devices, which generally do not work very effectively because they do the Simply move contaminating particles from the work area to the outside.

In Italy it has been found that where veil machines are used, around 70% of those in the atmosphere Solvent comes from the paints used in such veil machines. Using this one so high Paints containing volatile solvents are also associated with a constant fire hazard.

There is another disadvantage of the known veil machines

in the long drying time necessary for the property heights
that the / solvent percentages of the paints can be traced back to.

If you consider the drying time required with the application of these varnishes, which is around 30-40 minutes, then the long one becomes Drying device or oven effort clearly noticeable. As these drying devices are generally continuous ovens these ovens require a very long length. This is particularly detrimental to both costs this stove as well as the space necessary for the installation of the same. Another one of the well-known veils

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machine-detectable inadequacy is that it with the same is not possible »a lower amount of varnish to be applied as 50 g / m2.

There are also so-called "coating ^{machines 1} · known, in which the wooden panels to be coated are passed through rollers that apply primer. These machines only allow the application of small quantities of paint, for example up to 30 g / m ^ If you increase the amount of paint, you get an "orange peel-like" surface. As already mentioned, such machines are only used for the application of primers and are not able to produce quality or finished surfaces.

There are also known spatulas which are structurally similar to the coating machines, which can apply up to 150 gr / m2 of filler putty. Using varnishing products, however, these putty machines can apply up to a maximum of 30 gr / m ^{2 of} varnish. Attempts have already been made to create a roller machine of the type of coating and spatula machine for applying varnishing products. With this machine, however, the serious inadequacy arises, which consists in the fact that in the area of the upper transverse edge of the wooden panels during the paint application

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During the process, a stripe of lacquer flows down to the vertical front face of the wood panel practically over the entire width of the wood panel being processed, whereby a deficient stripe of lacquer also arises in the area of the front transverse edge.

The present invention is based on the object of specifying a machine of the type mentioned, which the Use of a dry percentage of the order of 95% Enabling lacquering products having, with a strong reduction in the solvent is achieved.

On the other hand, the provision of such a low percentage of solvent makes it possible to achieve the advantage of working with very short drying times, with drying papers of the Order of 3-5 seconds. are achievable. It will therefore possible to use drying ovens, the length of which can be kept very short, while at the same time the need for Installation areas required for the installation of the known drying ovens, which have a considerable length omitted.

The proposed solution ea is also possible for the primer paint a lot of 30-200 g / m ² and for

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the finishing work to apply an amount of varnish of 20-100 gr / m2. The risk of fire is also advantageously eliminated and keep the work area clean ..

With the solution according to the invention it is possible to use the above to avoid defective starting areas of the lacquered wooden panels. It therefore becomes the well-known and The usual sawing process to remove the beginning of the wood board strips is avoided, which in addition to the loss of material also a certain time to carry out the SSgevorganges as well as the presence of personnel required, whereby this is based on adversely affects the costs of creation.

Starting from a machine comprising a feed means of the Wooden panels to be treated, laxatives for the treated wooden panels, units for applying the varnish and actuators supporting frame: becomes the above-mentioned task yellow with a machine according to the invention, which thereby it is characterized that the same is a treatment station has, which consists of a first of superimposed Mixing rollers of the wooden panels to be treated together set pair of wood,. wherein the upper roller has a longitudinal axis parallel to the longitudinal axis of the lower roller has, which in relation to the lower roller in wood panel

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transport direction is offset in order to give the wooden panels a slight downward slope, and the

from the lower roller is preferably adjustable, and / a second ¹¹ downstream of the first roller pair is composed of superposed rollers having longitudinal axes extending essentially in the central horizontal plane of the first rollers, the lower roller of which is a likewise preferably controllable driven roller and the upper. Roller has a longitudinal axis which is parallel to the longitudinal axis of the lower roller and which is offset in relation to the lower roller in the opposite feed direction, means improving the smoothing of the varnishing products and auxiliary support means for the wooden panels are provided.

Advantageously, according to the invention, the upper rollers form of the first and second roller pairs mentioned, one lubricating roller each, which carries out an introductory coating of paint, and an actual paint feed roller. According to the invention, the paint feed roller also forms the intended smoothing-improving function Means, wherein · this roller with one in relation to the Wood panel feed direction rotates in the opposite direction of rotation.

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According to the invention, the auxiliary support means consist of at least a roller that is placed between the two lower rollers of the wShnten first and second roller pairs is resiliently mounted.

In addition, according to the invention, the rollers have the aforementioned first and second roller pairs of the treatment station a sweet made of elastic material, preferably made of Rubber, existing cover on.

In a first variant of the invention, which makes it possible to simplify both the structure of the machine considerably and also to simplify the control of the machine itself, the first pair of rollers is replaced by a Replaces roller that is used for positioning and preferably for Pre-wetting of the wooden panels is used, this roller in is mounted on a vertically adjustable carrier. This TrS-ger can be in the machine frame or preferably in the same TrSger are stored, which carries the upper treatment roller of the treatment roller pair.

To avoid the well-known flawed headstrip, use one made in the same vertical plane lying rollers existing roller pair is in a second variant according to the invention an element, preferably

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se a smaller roller, provided that is briefly resp. is instantly brought into contact with the upper roller of the pair of treatment rollers, so as to get out of this roller to remove part of the paint due to the impact and thereby create an impression in the paint veil, which makes it possible, if the same arrives in the area of the front upper edge of the wooden panel to be treated, the To avoid the formation of the above-mentioned defective forehead stripe. The necessary synchronism between the speed the upper roller and the speed of the wooden panels can be measured in a manner known per se by means of a sensor can be achieved, which is provided in front of the pair of treatment rollers and the passage of the wooden panels to be processed determined.

Advantageous further developments and variants of the machine according to the invention can be found in the subclaims.

Further features, details and advantages of the inventive Machine can be seen from the following description, which refers to three in the drawings schematically illustrated embodiments according to the invention, which are shown only by way of example *

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These show:

1 shows the construction principle of the machine according to the invention;

2-5 various successive phases of movement of a wooden panel to be processed;

6 shows a first variant of the machine according to the invention;

7-9 various successive phases of movement of a wooden panel to be processed; and

10 shows a second variant of the machine according to the invention with a detail on a larger scale.

In Fig. 1, a dashed frame is shown with 1, which represents the support frame of the machine. In this frame · is a number of feed rollers 2 and a second number of discharge rollers 3 mounted, the same in per se known and are controlled in a manner not shown. the machine according to the invention has a treatment station, that of a first and a second pair of rollers 4 and 4 respectively 5 is composed. The first pair 4 has a lower roller 6 and an upper roller 7, the second pair 5

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a lower roller 8 and an upper roller 9. on. ■ The rollers 6, 7, 8 represent driving rollers.

As can be clearly seen from Fig. 1, the upper roller 7 of the first pair 4 is mounted with a longitudinal axis which is parallel to the longitudinal axis of the roller 6 below and offset by a certain amount a in the transport direction / of the wooden panels 10, In the second pair of rollers 5, on the other hand, the upper roller 9 is mounted with a longitudinal axis which is parallel with respect to the longitudinal axis of the lower roller 8 and is offset by a dimension b against the direction of movement F. It can also be seen from the drawing that the upper rollers 7 and 9 and the lower rollers 6 and 8 each lie essentially in the same horizontal plane. It can also be seen from the drawing that the upper surface line of the rollers 6, 8 lies essentially in the horizontal plane defining the feed plane of the wooden panels 10.

From Fig. 1 it can also be seen that the lower rollers 6, 8 are each mounted in a carrier 11, 12, which are each firmly connected to a carriage 13, 14, each of which on a bed part 15 connected to the machine 1, are movable. In the example shown, this

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movement by means of a fine adjustment screw 17, 18 over a handwheel 19, 20.

According to the invention, the upper roller 7 forms part of a first unit 21, which is used for the introductory or preceding Applying paint is used, with a lubricating effect being achieved. This unit 21 contains a known roller 22 to form a paint backlog 23 which, in a known manner, serves to form a uniform paint film 24 which serves as a lubricant. A squeegee is denoted by 25 Rolls 22 and 7 is used, this TrSger 26 with a known unit 27 for the vertical movement or Scheme is connected. According to the invention also forms the upper roller 9 of this second pair 5 together with one Roller 28, which serves to form a backlog of paint 29, the actual paint feed unit 30. With 31 and 32 are Squeegee designated, with 33 representing a common carrier of the rollers 9, 28. There is also a unit for this TrSger 33 34 intended for vertical movement.

According to the invention, the rollers 6, 7, 8 and 9 have a soft elastic coating, preferably made of rubber. the Rollers 22 and 28 are made of steel. As clearly from the figure,

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removed,% st the direction of rotation of the roller 9 of the feed "direction of the wood plates 10 in opposite directions.

In the solution shown in Fig. 1, the smooth improving means consist of the upper with the opposite Direction of rotation rotating roller 9

According to the invention there are also the auxiliary support means of Wooden panels in the example shown consist of a roller 35 »which is provided between the lower rollers 6 and 8 and is resilient is stored in a manner known per se and not shown. This roller 35 is with a relatively short lung having wooden panels required.

FIGS. 2-5 show the various positions that the wooden panels 10 to be treated have during the treatment phase take in.

With the provision according to the invention of the offset a between the rollers 6, 7 of the first roller pair 4 is a slightly downwardly inclined position of the respectively supplied wood panel 10 causes. The size or the extent of this inclined position can be changed by lowering the Unit 21 or the roller 7 and / or by changing the

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Masses a are regulated. The wooden plate then comes into contact with the second pair of rollers 5, the wooden panel first touching the lower roller 8, the latter being a tangential one The wooden plate 10 hits the upper roller 9 according to a circumferential and relative because of the gumrai coverings causes resilient approach, this impingement in Combination with the direction of rotation of the roller 9, which is opposite to the direction of advance of the wood panel, to form an integral and Uniform varnish covering of the front part of the wooden panel 10 leads. If the wooden board is moved further, the same will essentially stand in the horizontal plane. this will made possible by the elasticity of the coatings on rollers 6-9 »

The distance between the rollers 6 and 7 or 8 and 9 is adapted to the thickness of the wooden panels to be treated. When acting on the HandrSder 19 _t 20, it is possible to offset the mass a and b as desired to Sndern. ...

Reference is now made to FIGS. 6-9, which relate to a first variant of the machine according to the invention, wherein In these figures, the same parts that have already been described in the previous figures, the same reference numerals have, wherein functionally equivalent parts have the same reference numerals completed with the letter a

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are. As can be seen from Fig. 6, the machine structure considerably simplified with respect to the structure of the machine of Fig. 1, the front pair of rollers by the positioning or pressure roller 7a is replaced. This positioning roller 7a is preferably in a carrier 21a stored, as received in the carrier 30a of the rollers 9, 8 Carriage is provided, the height control being able to be carried out via a handwheel 21b.

This solution makes it possible to achieve a shorter distance for the wooden board 10 between the roller 7a and the rollers 8, 9. The roller 7a is provided in contact with the roller 9, or controllably in a known manner, so that this roller 7a in turn is wetted by the lacquer veil and directs the same onto the upper surface of the wooden board 10, in order to achieve the desired pre-wetting or lubrication of the To effect wood plate 10 before the passage of the same between the rolls 8, 9.

This variant enables the same treatment of the wooden panels as with the machine shown in Fig. 1, wherein Figures 7-9 illustrate the intermediate stages in the treatment of a wood panel. If necessary, you can have an associated one Make paint supply for the roller 7a, with one not

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The illustrated and associated squeegee allows the formation of the intended paint backlog.

In the second variant of a machine according to the invention shown in FIG. 10: 9a and 8a denote the complementary rollers of the pair of treatment rollers, 28a the roller cooperating with roller 9a for the formation of the paint backlog 29, 10 the wooden panel to be treated, 33 the element or the Roller to form the impression _t 34 the impression or the material gap in the lacquer veil on the circumference of the roller 9a, 35 a doctor blade _f 36 a collecting pan, 37 a slide-like carrier of the parts 33t 35 and 36, which in both directions according to the arrow f is movable and 38 a

briefly
Sensor. If one / the roller 33 * ⁿ comes into contact with the roller 9a _f , an impression 34 is produced in the varnish veil, the impression 34 getting into the area of the front upper edge of this wooden panel during the feed movement of the wooden panel 10 and thus the formation of the dreaded stripe

prevented. Through the feeler 38, which makes the presence of the wood possible,
Plate 10 determined, it is / in a manner known per se and not shown here to intervene in the actuating means in order to thereby bring about the necessary synchronism between the speed of the wooden plate and the speed of the roller 9a.

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From the above it is easy to see that as with the machine according to the invention is easily possible »' to solve the problem mentioned at the beginning effectively, the advantages cited above being achieved. In particular, be the aforementioned defective beginning and end strips are avoided and, moreover, are of a very short length Drying ovens needed. With the proposed machine it is possible to work at high speeds as well to achieve a completely automated catfish. Even with the one in Pig. 10, it is possible to achieve the advantages indicated above. The lacquer feeding process direction ^ η were not shown because they are in themselves are known.

With the provision of a machine according to the invention in which the input and output rollers for the wooden panels have been replaced by a continuous belt-like conveyor belt, good results have also been obtained in practice.

In practice, it is also easily possible Modifications and variants, such as the type of storage the lower rollers 6, 8, or the means for moving them, or the feed rollers by feeders of other types, e.g. by means of a slide conveyor, or individual parts by others

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to replace technically and functionally equivalent parts without departing from the protective scope of the present invention.

The existing rubber coatings of the rollers 6τ9 consist of any other suitable material and be classified as beta tigungsaittel, or speed regulator, one can also use means that can be chosen at will. It would also be possible to have the rollers 6 and 8 stationary and

the units 21 and 30 also to be provided so that they can be longitudinally displaced.

All of the features that can be inferred from the description, the claims and the drawings are both individually and in any desired manner Combination with one another considered essential to the invention.

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Claims (2)

Applicant: GIARDINA Officine Aeromeccaniche di A. Giardina & C. Snc. Via Necchi 63 Figino Serenza (CO) - Italy and MEGO Figli di Emilio Romano di Romano Oreste & C. Snc. Via Resegone 12 Novedrate (CO) - Italy Description: Machine for applying viscous or pasty coating masses to panels 1.) Machine for applying viscous or pasty Coating compounds on panels, in particular for the wood furniture industry, with a feed device for the plate to be coated and at least one application roller in contact with the plate, from the surface thereof the coating compound is transferred to the plate, characterized by the following features: a) It is a parallel axis consisting of a lower support roller (8) and an upper applicator roller (9) Pair of rollers (5) provided for the passage of the plate (10), b) the support roller (8) touches the underside and the applicator roller (9) the upper side of the horizontally arranged Plate (10), c) the applicator roller (9) is offset in the opposite direction of feed relative to the support roller (8) (b), 030029/0500 d) the pair of rollers (5) is a height-adjustable guide roller (7) which touches the top of the plate (10); 7a) upstream, e) the guide roller (7; 7a) transfers a primer compound (23) to the plate. 2. Machine for applying viscous or pasty coating masses to plates, especially for the Wood furniture industry, with a feed device for the panel to be coated and at least one with the panel contact roller, from the surface of which the coating compound is transferred to the plate, characterized by the following features: a) It is composed of a lower support roller (8a) and an applicator roller arranged vertically above it (9a) an existing parallel-axis pair of rollers is provided for the passage of the plates (10), b) the support roller (a) touches the bottom and the Applicator roller (9a) the top of the horizontally arranged plate (10), c) the applicator roller (9a) works with an impression roller (33) od. The like. Together, the temporarily can be brought into contact with the applicator roller and thereby an impression (34) in that on the applicator roller (9a) causes adhesive coating compound film, 030029/0500 d) a control device with a sensor (38) which detects the presence of the plate (10) is provided, e) the control device causes the front upper edge of the plate (10) with the applicator roller (9a) meets in each case in the area of the impression (34). 3. Machine for applying varnishing products to flat surfaces, especially for wooden panels and the like., Containing a supply means for the wooden panels to be treated, discharge means for the treated wooden panels, units for applying the varnishing products as well as BetStigungsmittel supporting frame, characterized by ωΐ, the same (1) a Behänd treatment station (4, 5) , which consists of a first pair of rollers (4) composed of superimposed carrier rollers (6, 7) of the wooden panels (10) to be treated, the roller (7) being a roller pair with respect to the longitudinal axis of the lower roller (6) has a parallel longitudinal axis, which in 030029/0500 Relation to the lower roller (6) in the wood panel transport direction (?) is offset in order to give the wooden panels (10) a slight slope downwards and where the lower roller (6) is preferably adjustable, as well as / a second roller pair (4) downstream of the first roller pair (4) from one above the other and essentially in the central horizontal plane of the first rollers (6, 7) extending longitudinal axes having rollers (8, 9) composite roller pair (5), the lower Roller (8) is a likewise preferably controllably mounted driving roller and the upper roller (9) is one With respect to the longitudinal axis of the lower roller (8) having parallel longitudinal axis with respect to the lower roller The roller is offset in the opposite direction of the feed, the smoothness of the coating products being improved by means and auxiliary support means of the wooden panels are provided. 4. Machine according to claim 3, characterized in that the upper roller (7) of the first roller pair (4) at the same time the application roller of an application unit (21) for initial application of the varnish, the varnish acting as a wood board primer as well as a lubricant. 030029/0500 5. Machine according to claim 3 and \ _t characterized in that the upper roller (9) of the second roller pair (5) forms the application roller of the actual application unit (30), the upper roller (9) one of the feed direction (ü ¹ ) of the Wood panels (10) has opposite direction of rotation. 6. Machine according to one or more of the preceding claims, characterized in that the two application units (21, 30) are adjustable in height independently of one another. 7. Machine according to claim 3, characterized in that in the treatment station (4, 5) in front of the second pair of rollers (5) one of the positioning and preferably the pre-wetting of the wooden panels (10) serving roller (7a) is provided, said roller (7a ) is preferably mounted adjustable in height. 6. Machine according to claim 7, characterized in that the carrier of the positioning or pre-netting roller (7a) is advantageously designed as a slide (14) which has a handwheel control (21b) and in the carrier (33a) itself of the second pair of rollers ( 5) the machine handling 030029/0500 for 2S26997 ment rollers (8, 9) is mounted, wherein the TrSger (33a) is preferably vertically adjustable. 9. Machine according to claim 7 and 8, characterized in that that the carrier (21a) of the positioning roller (7a) is mounted in the frame of the machine. 1Q. Machine according to one or more of the preceding claims, characterized in that the lower roller (6, 8) of the first and second roller pair (4, 5) or of the second pair of rollers (5) in the longitudinal direction of the machine, preferably by known slide means (13, 14) is / are slidably mounted with fine adjustment screws (17, 18). ]. Machine according to one or more of the preceding claims, characterized in that in the units (21, 30) for applying the lacquer, the roller (22, 28) is preferably made of steel, and in the manufacturing unit (5) this roller (28) has a direction of rotation which is opposite to the direction of rotation of the roller (9). 030029/0500 -X- 1.2. Machine according to one or more of the preceding claims, characterized in that the auxiliary support means for the wooden panels (10) consist of a roller (35) between the lower rollers (6, 8) of the Treatment station (4, 5) is resiliently mounted. · Machine according to one or more of the preceding claims, characterized in that the lower rollers (6, 8) of the treatment station (4, 5) are fixedly mounted, the horizontal movement required to effect the desired offset due to the movement of the two application stations the painting agent is preferably achieved via slide-like means with a fine adjustment screw. . Machine for applying varnishing products to flat surfaces, in particular for wooden panels and the like, according to one or more of the preceding claims, or with a pair of treatment rollers (8a, 9a), the rollers (8a, 9a) of which lie one above the other and lie vertically in the same plane , characterized in that the upper roller (9a) with a child pressure roller. (33) or the like cooperates temporarily in contact with said upper roller (9a) to form a 030029/0500 pressure-like removal of the paint on the upper roller (9a) itself can be brought in a controllable manner, the presence of the moving wooden plate (10) being determined Means are provided for the necessary synchronism gear between the speed of the said to effect the upper roller (9a) and the Holzplattengeöch Speed, or to the moment of the up ^ -. reffens the front upper edge of the wooden plate (10) m: .t the roller (9a) in the area of the impression (34) in the »Ackschleier to determine itself on the roller (9a). 15. Machine according to one or more of the preceding claims, characterized in that for d; .e supply and discharge of the wooden panels (10) a continuous belt-like conveyor is provided. 16. A method for painting flat surfaces, in particular wooden board surfaces, characterized in that between a supply phase and a discharge phase of the essentially horizontal wooden boards (10) there is an intermediate phase fxv the supply of the wooden boards (10) with slightly inclined wooden boards (10) . D30029 / Q500