DE603599C

DE603599C - Production of a coating on continuously moving plate-shaped workpieces by means of moving nozzles

Info

Publication number: DE603599C
Application number: DET40477D
Authority: DE
Original assignee: TRIPLEX CONTINENTAL Ltd
Current assignee: TRIPLEX CONTINENTAL Ltd
Priority date: 1931-04-22
Filing date: 1932-04-06
Publication date: 1934-10-04

Description

Die Erzeugung eines Überzuges, z. B. einer Farbschicht ο. dgl., auf fortlaufend bewegten Bahnen bzw. plattenförmigen Werkstücken mittels quer zur Vorschubrichtung der Platten über diese bewegter Düsen ist bekannt. Besondere Mittel zur Erzielung· einer hohen Gleichmäßigkeit des Überzuges fehlen aber bei diesen Vorrichtungen, zumal in den Fällen, wo Schablonierarbeit an einer Werkstoffbahn mit nur felderweise die Fläche überdeckendem. Überzug erfolgen soll. Wenn man bei einer bekannten Maschine dieser Art die Auftragdüsen über dem Werkstück, während dasselbe längs fortschreitet, eine gestreckte achtförmige Schleifenkurve in Querrichtung beschreiben läßt, so konnte auch hiermit eine befriedigende Gleichmäßigkeit der Schichtdicke, zumal bei zäher Beschaffenheit des Auftragstoffes, nicht erreicht werden, weil wegen der Überlappung der so erzeugten Auftragsstreifen starke Ungleichmäßigkeiten auftreten. Überdies ist bei dieser bekannten Arbeitsweise wegen der Umkehrbewegung, die jeweils am Ende eines Hinundherganges der Auftragdüse erfolgt, die Anwendung einer relativ hohen Geschwindigkeit nicht möglich.. Gemäß vorliegender Erfindung wird, insbesondere zum Überziehen von Glasplatten, eine praktisch gleichmäßige Überzugschicht mit Mitteln erreicht, die eine hohe Arbeitsgeschwindigkeit anzuwenden gestatten, und zwar dadurch, daß die Düse in einer Kreisbahn über das Werkstück bewegt wird, deren Durchmesser wesentlich größer ist als die Breite des Werkstücks; dabei erfolgt die Betätigung der Düse nur während des Überschreitens des Werkstücks.The production of a coating, e.g. B. a layer of paint ο. Like., on continuously moving Tracks or plate-shaped workpieces by means of transverse to the feed direction of the plates about these moving nozzles is known. Special means of achieving · a high However, these devices lack uniformity of the coating, especially in cases where stencil work on a sheet of material that only covers the area in areas. Plating should be done. If you in a known machine of this type, the application nozzles over the workpiece while the same progresses lengthways, an elongated figure-eight loop curve in the transverse direction can be described, a satisfactory uniformity of the layer thickness could also be achieved with this, especially if the application material is tough, cannot be achieved because of the overlapping of the application strips thus generated severe irregularities occur. Moreover, in this known mode of operation, because of the reversing movement, the takes place at the end of a reciprocation of the application nozzle, the application of a relatively high speed not possible .. According to the present invention, in particular for coating glass plates, a practically uniform coating layer is achieved with means that allow a high working speed Allow to use, namely that the nozzle in a circular path is moved over the workpiece, the diameter of which is substantially larger than the width of the workpiece; the Actuation of the nozzle only while crossing the workpiece.

Auf den Zeichnungen ist in Fig. 1 bis 6 eine beispielsweise Ausführung einer Vorrichtung nach der Erfindung dargestellt. Es zeigen:In the drawings, FIGS. 1 to 6 show an exemplary embodiment of a device shown according to the invention. Show it:

Fig. ι einen teilweise im Schnitt gezeichneten Aufriß eines zwei Düsen in einer Kreisbahn führenden Gestells,Fig. Ι an elevation, partially drawn in section, of two nozzles in a circular path leading frame,

Fig. 2, 3 und 4 im Querschnitt Teile der Ventile,Fig. 2, 3 and 4 in cross section parts of the valves,

Fig. 5 teilweise im Schnitt eine Vorrichtung mit einem Steuerorgan, welches für mechanische Betätigung eingerichtet ist,Fig. 5, partially in section, a device with a control member, which for mechanical actuation is set up,

Fig. 6 einen Grundriß.Fig. 6 is a plan view.

Die Fig. 7 bis 9 dienen zur Erläuterung des Prinzips, auf welchem die Erfindung beruht. 7 to 9 serve to explain the principle on which the invention is based.

Durch jede der zwei Düsen wird bei ihrer strichweisen Bewegung über das langsam bewegte Werkstück zufolge der Ausbreitung der austretenden Flüssigkeit quer zur Strichrichtung ein hügelförmiger Auftrag ent-Each of the two nozzles moves slowly over the slowly moving one Workpiece according to the spread of the escaping liquid transversely to the direction of the line a hill-shaped order

Claims

are, the section in Fig. 7 with an enlarged Height dimension is illustrated. This hill shape can be approximated, for example, by the trapezoidal profile section in FIG. 8 be replaced. If the nozzle tip when moving the workpiece in the longitudinal direction the workpiece subsequently crossed again, then according to FIG. 9 there is a One after the other of the hilly zones, some of which overlap. With a certain Feed rate of the workpiece compared to the speed and the effective range the nozzles can be used for a middle zone. Achieve the overlap so large that in the area of the overlap the double-layer application evens out to a height that is roughly the average layer thickness corresponds to the order zone. In the case of a reciprocating nozzle movement, there would be a such a balance cannot be achieved. Even in the case of a circular in the same direction Movement of the nozzles results in such a compensation only in the area of a ratio workpiece width limited to the circle diameter. When the diameter of the circle in which (the nozzle its rotary motion executes, is equal to the width of the workpiece, the edges of the strip are preserved because of the multiple layer overlaps a much thicker application layer than in the Center. For this reason, according to FIG. 6, the diameter for the circular path of the nozzle chosen to be much larger than the width of the workpiece. Since the effect of the Nozzles outside of this latitude are pointless, is done to avoid ear bruises the actuation of the nozzles only while the workpiece is being passed.

In the apparatus of Fig. 1 are on a bogie with a vertical axis of rotation two spray nozzles 1, one on each side, arranged opposite one another. Means Clamps 2 they are attached to rods 3 carried by radial arms S. which are connected to the bogie spindle 6. By clamps 4 is a radial adjustment of the rods 3 with regard to their distance from the spindle 6 possible, the nozzles 1 can also be adjusted in height by means of their clamps will. The spindle 6 rotates in an upper bearing 7 and receives its drive by a worm wheel 8. Accordingly, the bogie with the nozzles 1 receives a continuous circular motion. The nozzles exceed that below them in advance grasped plate-shaped workpiece 38 (FIG. 6) in the transverse direction with each revolution twice, one time in one direction and the other time in the opposite direction Direction. The diameter of the circular path described by the nozzles is significantly larger than the width of the workpiece.

The liquid to be sprayed is fed through pipe 9 and a neck socket 10 in (not shown) Channels within the spindle 6, from where the feed to the mouthpieces by means of the flexible Hoses 11 takes place. The compressed air, which is used to atomize the liquid, is on the way through the pipe 12 together with the neck collar 13 and following (not shown) Channels of the spindle and flexible hoses 14 connected thereto are supplied.

The control of the mouthpieces is accomplished by air pressure, whereby for the compressed air line the tubes 15 with channels 16 provided within the spindle are used, which at holes 17 (Fig. 1, 2 and 3) on the plate 18 sitting on the spindle to end.

The slide device intended for the compressed air control consists of three parts: the plate 18, the slide body 19 (Fig. 1 and 3) and the lid 20 (Figs. 1 and 4).

1'ATIiN TAW Üi'HU CIi "·

Production of a coating on continuously moving plate-shaped work-go pieces by means of nozzles moved across the board's feed direction, which are activated by a control device, characterized in that, that the nozzle (1) moves in a circular path over the workpiece (38), whose diameter is much larger than the width of the workpiece, and the actuation of the nozzle only during the The workpiece is exceeded.

For this purpose ι sheet of drawings