DK3199247T3

DK3199247T3 - SLOT CAST AND COATING SYSTEM

Info

Publication number: DK3199247T3
Application number: DK16153025.8T
Authority: DK
Inventors: Alexander Pankratz
Original assignee: Coatema Coating Machinery Gmbh
Priority date: 2016-01-27
Filing date: 2016-01-27
Publication date: 2019-04-23
Also published as: EP3199247A1; WO2017129668A1; PT3199247T; EP3199247B1; EP3199247B9; PL3199247T3; DK3199247T5

Description

Description [0001] The invention relates to a slot caster with a longitudinal coating nozzle for the application of material in a coating system.

[0002] Such coating systems are known from actual practice, which comprise a roller and a slot caster provided at a short distance interval from the roller. The slot caster comprises in this situation a longitudinal coating nozzle for the material application of the fluid coating material in the coating system. A slot caster is derived, for example, from US 514 74 62.

[0003] Disadvantageous in this situation is the fact that an adequate straightness of the coating nozzle is absolutely necessary for good production results. In order to attain such straightness, extremely elaborate production steps are necessary.

[0004] First, the roller must exhibit a high degree of cylindricity, in order for a parallel gap to be attained, i.e. the spacing interval between the coating nozzle and the roller.

[0005] In addition, if large coating widths are required, the slot caster must be designed as very solid, in order to be able to guarantee adequate rigidity and therefore sufficient shape precision of the coating nozzle. This then also requires a very elaborate arrangement for the slot caster receiver, which is incurred by the heavy weight alone, which must be securely held and also moved. Due to the heavy weight, the handling of the slot caster is also rendered difficult, for example during daily cleaning work etc. This solid structural design also incurs high material costs.

[0006] In addition to this, when in operation the temperature influence on the slot caster or the roller may result in changes in the slot geometry, i.e. the interval spacing between the coating nozzle and the roller, without this being able to be influenced or this situation being counteracted.

[0007] The object of the invention is to avoid the disadvantages referred to, and to provide a slot caster with which improved coating results can be achieved.

[0008] This object is solved with a generic slot caster according to the claims.

[0009] According to the invention, the actuator elements have an adjustment range of 5 mm, preferably of 2 mm, which is sufficient for most cases and still allows a high degree of precision to be achieved. If required, the adjustment range can also be greater.

[0010] According to the invention, the actuator elements exhibit an adjustment precision of approx. 1/10 to 1/20 pm. If required, the adjustment precision can also be better.

[0011] According to the invention, the actuator elements are provided along the longitudinal extension of the coating nozzle, with an interval spacing between one another of approx. 150 mm to 400 mm, and preferably an interval spacing of approx. 300 mm, such that a sufficiently precise shaping of the coating nozzle is possible.

[0012] According to the invention, the rigidity of the carrier element is greater, in particular by a multiple, such as, for example, the factor 3, than the rigidity of the coating nozzle, such that, at the adjustment of the actuator elements, only a displacement of the coating nozzle in its respective range takes place, and no deformation or displacement of the carrier element.

[0013] For an adequately precise displacement of the coating nozzle in the relevant range in each case, at least three actuator elements are provided for, and preferably ten or more actuator elements.

[0014] According to the invention, the actuator elements are configured as differential elements, such that a slight rise per revolution results. As a result, a finer adjustment is possible, with reduced torque moment.

[0015] The invention further relates to a coating system with a roller and a slot caster, provided at a short distance interval from the roller, which comprises a longitudinal coating nozzle for the material application in the coating system.

[0016] In order to avoid the disadvantages referred to in the preamble and to provide a coating system with which improved coating results can be achieved, a slot caster according to the invention should be provided in a generic coating system.

[0017] In this situation, the slot caster can be arranged in such a way that the adjustment direction of the actuator elements lies in a horizontal plane.

[0018] Preferably, for the alignment of the carrier element in order to adjust the straightness of the slot caster, at least one adjustment element can be provided, which can be adjusted in the vertical direction and which changes the alignment of the carrier element accordingly.

[0019] The distance interval between the slot caster and the roller can also be changed by means of corresponding relocation elements, in particular in a translatory manner.

[0020] With a preferred exemplary embodiment of the invention, the alignment of the slot caster in relation to the roller can be changed by means of corresponding pivot elements, in particular rotationally about a pivot axis parallel to the axis of the roller.

[0021] The exemplary embodiment represented in the drawings is explained hereinafter. The drawings show:

Fig. 1 A perspective view of a slot caster according to the invention, with a roller assigned to it,

Fig. 2 a side sectional representation of the object according to Fig. 1 and,

Fig. 3 a detailed enlargement of the object according to Fig. 2.

[0022] In all the Figures, concordant reference numbers are used for components which are the same or of the same type.

[0023] Fig. 1 shows a slot caster 1, with a longitudinal coating nozzle 2 for the material application in a coating system, of which only the roller 3 is represented. The slot caster 1 is arranged in this situation in such a way that it is provided to the side, next to the roller 3. The outlet direction of the coating nozzle (2), i.e. the direction of flow of the fluid coating material, is provided as horizontal.

[0024] The slot caster 1 further comprises a longitudinal rigid carrier element 4, which in the exemplary embodiment shown is configured as an angular longitudinal profile. The coating nozzle 2 is attached to this carrier element 4 with the intermediate engagement of a number of actuator elements 5.

[0025] In this situation the actuator elements 5 are arranged distributed uniformly along the longitudinal extension of the coating nozzle 2, in each case at a spacing interval from one another, wherein the actuator elements 5 are connected by their one end in each case to the carrier 4, and by their other end in each case to the coating nozzle 2.

[0026] The coating nozzle 2 is configured, at least in its outlet direction, i.e. the flow direction of the fluid coating material, to be sufficiently flexible that, by way of the individually controllable actuator elements 5, and by means of the adjustment of the respective actuator element 5 in the outlet direction, it can undergo a specific displacement in the respective region. Accordingly, by the appropriate adjustment of the actuator elements 5, a homogenous gap width can be achieved, and a uniform distance interval between the coating nozzle 2 and the roller 4, and therefore also a homogenous coating thickness over the entire coating width, the width of the coating nozzle 2.

[0027] As can be seen from Figs. 2 and 3, the actuator elements 5 are configured as differential elements, also referred to as differential screw elements, which are provided with two threads 6, 7 of different pitch, wherein the adjustment is a function of the difference of the two pitches of the two threads 6, 7. This results in a lesser rise per revolution, and a finer adjustment is possible, with reduced torque moment.

[0028] As an alternative, the alignment of the coating nozzle 2 can also be vertical, both upwards as well as downwards. It is also possible for a plurality of coating nozzles 2 to be provided, for example one to the side next to the roller 3, one beneath the roller 3, and one above the roller 3.

Claims

Slot casting (1) with an elongated coating nozzle (2) for application of material to a coating apparatus where a preferably elongated rigid support member (4) is provided, upon which the coating nozzle (2) is mounted by introducing a plurality of adjusting elements (5) spaced apart by a distance along their longitudinal extension, wherein the adjusting members (5) are connected, respectively, to the support member (4) at their first end and to the coating nozzle (2) at their second end, and wherein the coating nozzle (2) is configured flexibly at least its outlet direction in such a way that, as a result of the individually actuable adjusting members (5), when adjusting each adjusting member (5) in the outlet direction, a specific displacement of the coating nozzle (2) within its respective range is possible. in that the adjusting elements (5) have an adjustment range of up to 5 mm, f orderly up to 2 mm, and the adjusting elements (5) are provided along the longitudinal extension of the coating nozzle (2) with a spacing of approximately 150 mm to 400 mm, preferably an interval of approximately 300 mm, and the stiffness of the support element (4). is greater than the stiffness of the coating nozzle (2), and where at least three adjusting elements (5) and preferably ten or more adjusting elements (5) are provided, and the adjusting elements (5) are configured as differential elements.

Slot casting (1) according to any one of the preceding claims, characterized in that the adjusting elements (5) exhibit an adjustment precision of approximately 1/10 to 2/10 pm.

Slot casting (1) according to any one of the preceding claims, characterized in that the stiffness of the support element (4) is greater than a multiple, for example, the factor 3 than the stiffness of the coating nozzle (2).

Coating system with a roller (3) and a slit mold (1) formed at a very small distance from the roll (3) comprising a longitudinal coating nozzle (2) for application of material in the coating system, characterized in that the slit mold (1) is configured according to any of the preceding claims.

Coating system according to the preceding claim, characterized in that the slot casting (1) is arranged in such a way that the alignment direction of the adjusting elements (5) lies in a horizontal plane.

Coating system according to claim 4 or 5, characterized in that at least one adjusting element for adjusting the support element (4) is provided for adjusting the straightness of the slot casting (1) which can be adjusted in the vertical direction and changing the straightness of the support element (4) correspondingly. .

Coating system according to any one of claims 4-6, characterized in that the straightness of the slit casting (1) and the roller (3) can be changed by means of corresponding shear elements, preferably in a translational manner.

Coating system according to any one of claims 4-7, characterized in that the straightness of the slot casting (1) relative to the roller (3) can be changed by means of corresponding turning elements, in particular by rotation about a axis of rotation parallel to the axis of the roller (3). .