DE202023103026U1 - Improved slot die coating system - Google Patents

Abstract

An improved slot die coating system comprising a coating head body capable of receiving a coating material for coating, characterized in that the coating head body has at least one channel and at least one slot die, the improved slot die coating system further comprising a plurality of feed modules and a separation plate, all of the feed modules being separated from one another are independent and continuously connected to the channel and, corresponding to the feed modules, the channel is divided into several outlet openings by the separating plate.

Description

Field of invention

The present invention relates to a coating system and in particular to an improved slot die coating system in which synchronous or asynchronous or continuous or intermittent coating can be achieved with a single stroke.

State of the art

In slot-die coating, a coating material is extruded through a slot nozzle using a slot-shaped coating head and applied to the substrate to be coated. The slot-shaped nozzle is very suitable for large-area coating and, in conjunction with a conveyor system such as a roller or conveyor belt, can enable a continuous coating process.

However, the conventional slot die coating is subject to considerable limitations in its application. When the width of the slot is large or the viscosity of the coating material is high or the process requires an increase in the coating speed, the temperature at the ends on two sides will drop, which will negatively affect the uniformity of the mold flow. This leads to significant deterioration in the effect and uniformity of the coating, resulting in uneven coating thickness or defective width.

Although slot die coating has a very high coating efficiency, it can only cope with continuous or intermittent coating processes in one direction. For increasingly complex coating conditions, such as Such as synchronous or asynchronous multi-area coating, continuous or intermittent multi-area coating and their mixed coating, the conventional slot die coating is not well suited, so it is difficult to ensure continuous mass production.

In view of this, the present invention proposes an improved slot die coating system to overcome the above-mentioned deficiencies.

Task of the invention

It is the main object of the present invention to provide an improved slot die coating system that can solve the problems that the temperature of the mold flow due to the large width of the slot or the high viscosity of the coating material or when the process requires an increase in the coating speed is not uniform and the coating result is not good.

It is a further object of the present invention to provide an improved slot die coating system with which the slot die coater can perform synchronous or asynchronous coating for a single or multiple areas and continuous or intermittent coating for multiple areas, thereby achieving the coating for various requirements is achieved with a single stroke to significantly improve the adaptability of slot die coating and reduce process complexity and manufacturing costs.

The improved slot die coating system according to the invention comprises a coating head body having a channel and a slot die, wherein a coating material can be received through the channel and used for coating through the slot die, characterized in that this system comprises a plurality of feed modules and a separation plate, all of which Feed modules are independent of each other and are continuously connected to the channel and the channel is divided by the separating plate into several outlet openings corresponding to the feed modules in order to achieve a synchronous or asynchronous coating for a single or several areas or a continuous or intermittent coating for several areas to reach.

Furthermore, the present invention provides an improved slot die coating system which can accommodate a coating material for coating and comprises a plurality of coating head bodies, the coating head bodies being arranged side by side and independently of one another and each being connected to a feed module and each coating head body having a channel and a slot die, wherein the coating material is received through the channel and used for coating through the slot nozzle in order to achieve a synchronous or asynchronous coating for a single or multiple areas or a continuous or intermittent coating for multiple areas.

For a better understanding of the tasks, the technical content, the features and the above The specific exemplary embodiments are described in detail below to benefit from the beneficial effects of the present invention.

Brief description of the drawings

• 1 shows a schematic view of a first embodiment of the improved slot die coating system;
• 2 shows a schematic exploded view of the first embodiment of the improved slot die coating system;
• 3A and 3B show schematic views of the first embodiment of the improved slot nozzle coating system during the spraying process;
• 4 shows a schematic view of another variation of the first embodiment of the improved slot die coating system;
• 5 shows a schematic exploded view of the further variation of the first embodiment of the improved slot die coating system;
• 6A until 6D show schematic views of the further variation of the first embodiment of the improved slot nozzle coating system in the spraying process;
• 7A and 7B show schematic views of yet another variation of the first embodiment of the improved slot die coating system;
• 8A until 8D show schematic views of a second embodiment of the improved slot nozzle coating system during the spraying process.

Detailed description of the exemplary embodiments

For a better understanding of the advantages, essence and features of the present invention, exemplary embodiments are described in detail below with reference to the figures. It should be noted that these embodiments are only representative embodiments of the present invention and are not intended to limit the implementation and claims of the present invention to these embodiments. The purpose of providing these embodiments is merely to make the disclosure of the present invention more detailed and easier to understand.

The terminology used herein is solely for the purpose of describing particular embodiments and is not intended to limit the general spirit of the invention. As used herein, the singular forms "a" etc. and "the" etc. are intended to also include the plural forms unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meanings as generally understood by one of ordinary skill in the art to which the embodiments pertain. It is further understood that terms defined in commonly used dictionaries should be interpreted with a meaning consistent with their meaning in the context of the relevant technology and should not be construed in an idealized or overly formal sense unless expressly stated herein defined like this.

Reference throughout the specification to “a particular embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases “in a particular embodiment” or “in any embodiment” in various places throughout this specification do not necessarily all refer to the same embodiment. Additionally, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In describing the present invention, it should be noted that the terms "installed", "connected" and "arranged" are to be understood in a broad sense, for example mechanical or electrical / directly or indirectly through an intermediate medium that provides the internal connection between two Components can be connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art from the relevant context.

It will be on the 1 and 2 Reference is made which shows a first embodiment of the improved slot die coating system according to the invention. Because the width of the slot is large, the viscosity of the coating material is high, or the process requires an increase in the coating speed, the temperature at the ends on two sides drops, which affects the uniformity of the mold flow tive effect. In view of this, the improved slot die coating system 1 includes a coating head body 10 and a plurality of feed modules 20, wherein the coating head body 10 can receive the coating material supplied by the feed modules 20 and introduce it into the channel 105, then the coating material is fed through the channel 105 located below the channel 105 for coating Slot nozzle 104 led out. As shown in the figures, in the present invention, the coating head body 10 consists in cross section of a trapezoidal upper mold 11 and a trapezoidal lower mold 12, each having a first coating fluid receiving groove 1051 and a second coating fluid receiving groove 1052, respectively. The upper mold 11 and the lower mold 12 are placed one on top of the other in such a way that the first coating fluid receiving groove 1051 and the second coating fluid receiving groove 1052 together form a channel 105 and a slot nozzle 104 continuously connected to the channel is provided at the lower end of the coating head body 10.

As shown in the figures, the number of feed modules 20 is three, including a first feed container 21, a second feed container 22 and a third feed container 23, the first feed container 21, the second feed container 22 and the third for continuous connection with the channel 105 Feed containers 23 are each continuously connected by a first feed pipe 211, a second feed pipe 221 and a third feed pipe 231 with a first feed opening 101, a second feed opening 102 and a third feed opening 103. In order to fill the coating material contained in the first feed tank 21, second feed tank 22 and third feed tank 23 into the devices such as the coating head body 10, external pumps are used. The details and shapes are the same as the coating heads of conventional slot die coatings, therefore the coating material supply system, for example an external pump, is omitted from the figures and only the improved slot die coating system 1 is shown.

It will be on 2 Referenced. Only the upper mold 11 has feed openings (first feed opening 101, second feed opening 102 and third feed opening 103). It should be specifically noted here that the upper mold 11 and the lower mold 12 only serve as an indication that the coating head body 10 consists of two molds, and are not intended to limit their upper and lower positional relationship. It is also possible that both the upper mold 11 and the lower mold 12 have feed openings or the feed openings (first feed opening 101, second feed opening 102 and third feed opening 103) are not on the same mold. Similarly, the upper mold 11 and the lower mold 12 each have a first coating fluid receiving groove 1051 and a second coating fluid receiving groove 1052, respectively, to form a channel 105. Depending on the actual usage situation, only a single molding tool may have the coating fluid receiving groove.

It will now open 3A Referenced. The plurality of feed modules 20 are independent of each other, that is, the first feed container 21, the second feed container 22 and the third feed container 23 control their feed separately from each other, so that the coating fluid passes through the first feed pipe 211, the second feed pipe 221 and the third feed pipe 231, respectively carried out and then introduced into the channel 105 via the first feed opening 101, the second feed opening 102 and the third feed opening 103. Therefore, problems such as uneven mold flow caused by the larger width of the slot, higher viscosity of the coating material, or increased coating speed required by the process can be overcome.

Specifically, the coating fluid is introduced into the channel 105 through the first feed container 21, the second feed container 22 and the third feed container 23. Unlike the conventional single feed port construction, in the present invention, the distance that the coating fluid introduced through the first feed port 101, the second feed port 102 and the third feed port 103 must travel can be shortened, so that the problem of Uneven mold flow caused by a drop in temperature can be overcome. As shown in the figures, a roller 51 may be used for feeding and coating if the substrate 52 is thinner or flexible. However, the roller 51 is for illustrative purposes only and there is no limitation that only the roller 51 can be used for feeding and coating in the present invention. Other methods such as conveyor belts can also be used for this. With the improved slot die coating system 1 according to the invention, a continuous, band-shaped coating pattern 53 can be achieved. A subsequent drying device 60 is then used for drying. Since multiple independent feed modules 20 are used, a very uniform coating can be achieved without having to compromise production speed, coating width and viscosity of the Coating fluids to be subject to restrictions.

Further, in the present invention, the number and installation positions of the plurality of feeding modules 20 can be adjusted according to the actual usage conditions. For example, the number of feed modules 20 can also be increased for coating with a larger width. Or, depending on specific patterns or requirements, the configuration of the feed modules 20 can also be adjusted (e.g. non-equidistant arrangement, etc.). It will be on 3B Referenced. Furthermore, intermittent coating patterns 53 can be achieved by controlling the timing of the feed modules 20. Likewise, the distance between the coating patterns 53 can also be set to different widths or unequal distances depending on the state of use.

Furthermore, if considerations are given to more complex coating patterns, such as: B. a multi-area coating for a single stroke (see 6A) , a separation plate can be used. It will be on the 4 and 5 Referenced. A separating plate 30 is clamped between the upper mold 11 and the lower mold 12, the separating plate 30 being adapted to the number of feed modules 20 and being comb-shaped and having several recesses. Specifically, it has four projections, namely a first projection 31, a second projection 32, a third projection 33 and a fourth projection 34, with a first recess 301, a second recess 302 and a third recess 303 being formed between them. Each recess corresponds to a feed opening, so that the coating material supplied by different feed modules 20 is blocked by the separating plate 30 and led out of the respective recess, which will be described in detail below.

It will be on 6A Referenced. The coating material provided by the first supply container 21 is passed through the first supply pipe 211 and then introduced into the channel 105 via the first supply opening 101 and then limited by the first projection 31 and the second projection 32 of the separation plate 30 and for coating via the first recess 301 led out; The coating material provided by the second feed container 22 is passed through the second feed pipe 221 and then introduced into the channel 105 via the second feed opening 102 and then limited by the second projection 32 and the third projection 33 of the separating plate 30 and for coating via the second recess 302 brought out; The coating material provided by the third supply container 23 is passed through the third supply pipe 231 and then introduced into the channel 105 via the third supply opening 103 and then limited by the third projection 33 and the fourth projection 34 of the separating plate 30 and for coating via the third recess 303 brought out. In this way, continuous coating of multiple rows (or multiple areas) can be accomplished with a single stroke.

It will be on 6B Referenced. Similarly, by controlling the timing of the feed modules 20, intermittent coating patterns 53 can also be achieved. It will be on the 6C and 6D Referenced. Similarly, by controlling the feed length and timing, asynchronous coating or continuous and intermittent mixed coating can also be achieved. Furthermore, in order to make the control of the mold flow more stable, the channel can also be divided into several completely independent channels according to the number of feed containers. It will be on 7A Referenced. The upper mold 11 has a plurality of completely independent first coating fluid receiving grooves 1051A, 1051B, 1051C and the lower mold 12 has corresponding completely independent second coating fluid receiving grooves 1052A, 1052B, 1052C. Therefore, after combining the upper mold 11 and the lower mold 12, several completely independent channels can be formed using the corresponding slot nozzles 1041, 1042, 1043 for coating. It will be on 7B Referenced. Alternatively, in conjunction with the design of the partition plate 30, the required thicknesses of the slot nozzles are defined by the four projections of the partition plate 30 and the first recess 301, second recess 302 and third recess 303 formed therebetween. Compared to the above embodiment, in the present embodiment, different coating fluids can be used or the required coating thicknesses can be achieved by adjusting the thickness of the separating plate 30.

In addition, based on the concept that the several identical feed modules 20 are independent of one another, the coating head body 10 can also be designed as a plurality of coating head bodies arranged next to one another with a smaller width. It will be on 8A Referenced. A first coating head body 41, a second coating head body 42 and a third coating head body 43 are provided and correspond to the different feed modules 20. As in the figure shown, the first coating head body 41 corresponds to the first feed container 21 and the first feed tube 211, the second coating head body 42 corresponds to the second feed container 22 and the second feed tube 221 and the third coating head body 43 corresponds to the third feed container 23 and the third feed tube 231. The first coating head body 41, the second coating head body 42 and the third coating head body 43 are identical in construction to the coating head body 10 described above. The difference is that in order to coordinate with the different feed modules 20, the first coating head body 41, the second coating head body 42 and the third Coating head body 43 each only has a single feed opening. Likewise, different feed modules 20 can also be controlled independently of one another.

It will now open 8A Referenced. By designing multiple coating head bodies, the above-mentioned continuous coating of multiple rows (or multiple areas) can be achieved with a single stroke. Or intermittent coating can be achieved by controlling the timing of coating (see 8B) . Or asynchronous coating or continuous and intermittent mixed coating can be achieved by controlling the feeding length and timing (see the 8C and 8D ).

Based on the same concept, in practice a coating pattern 53 can be customized depending on use. In addition, the above two exemplary embodiments can also be used in combination. For example, a single coating head body with a larger width (corresponding to multiple feed modules) is used in conjunction with a coating head body with a smaller width (corresponding to a single or few feed modules). The actual structure and operating principle are the same and will not be described again here.

In summary, the present invention provides an improved slot die coating system. Because multiple independent feed modules correspond to a single coating head body with a large width or to multiple coating head bodies, continuous coating of multiple rows (or multiple areas) at a single stroke or intermittent coating can be performed or performed by controlling the timing of the feed modules By controlling the feed length and the time sequence, asynchronous coating or continuous and intermittent mixed coating can also be achieved. Therefore, the invention can be effectively used for situations with various coating conditions, such as: B. with a wide slot, high viscosity of a coating material or an increase in coating speed required by the process to overcome the problems of uneven coating thickness or defective width caused by uneven mold flow and thus optimize the coating quality.

The above description only represents preferred embodiments of the invention and is not intended to limit the claims. All equivalent changes and modifications that may be made by one skilled in the art in accordance with the description and drawings of the invention are included within the scope of the present invention.

Reference symbol list

1

improved slot die coating system

101

first feed opening

102

second feed opening

103

third feed opening

104

slot nozzle

1041

slot nozzle

1042

slot nozzle

1043

slot nozzle

105

channel

1051

first coating fluid receiving groove

1051A

first coating fluid receiving groove

1051B

first coating fluid receiving groove

1051C

first coating fluid receiving groove

1052

second coating fluid receiving groove

1052A

second coating fluid receiving groove

1052B

second coating fluid receiving groove

1052C

second coating fluid receiving groove

11

upper mold

12

lower mold

20

Feeding module

21

first feed container

211

first feed pipe

22

second feed container

221

second feed pipe

23

third feed container

231

third feed pipe

30

Separation plate

301

first recess

302

second recess

303

third recess

31

first lead

32

second lead

33

third lead

34

fourth lead

41

first coating head body

42

second coating head body

43

third coating head body

51

role

52

Substrate

53

Coating pattern

60

Drying device

Claims (13)

An improved slot die coating system comprising a coating head body capable of receiving a coating material for coating, characterized in that the coating head body has at least one channel and at least one slot die, the improved slot die coating system further comprising a plurality of feed modules and a separation plate, all of the feed modules being separated from one another are independent and continuously connected to the channel and, corresponding to the feed modules, the channel is divided into several outlet openings by the separating plate. Improved slot die coating system Claim 1 , wherein the coating head body includes an upper mold and a lower mold each having a first coating fluid receiving groove and a second coating fluid receiving groove, respectively. Improved slot die coating system Claim 2 , in which the upper mold has a plurality of feed openings, each feed opening corresponding to one of the feed modules. Improved slot die coating system Claim 2 , in which the separating plate has several recesses, each recess corresponding to one of the feed modules, so that the feed modules carry out a coating at the corresponding outlet openings. Improved slot die coating system Claim 1 , in which the coating head body has a plurality of channels corresponding to the corresponding feed modules, the channels being independent of one another and not being continuously connected to one another. Improved slot die coating system Claim 5 , in which the coating head body has several slot nozzles corresponding to the corresponding channels. Improved slot die coating system Claim 1 , in which the feed modules correspond synchronously with the export openings for coating. Improved slot die coating system Claim 1 , in which the feed modules correspond asynchronously with the outlet openings for coating. Improved slot die coating system Claim 1 , in which the feed modules correspond to the outlet openings for intermittent coating. An improved slot die coating system capable of receiving a coating material for coating and comprising: a plurality of coating head bodies, which are arranged next to one another and independently of one another and are each continuously connected to a feed module, each coating head body having a channel and a slot nozzle and a coating material being picked up by the corresponding feed module and introduced into the corresponding channel and used for coating through the corresponding slot nozzle . Improved slot die coating system Claim 10 , in which the coating head bodies carry out synchronous coating through the feed modules. Improved slot die coating system Claim 10 , in which the coating The processing head body carries out an asynchronous coating through the feed modules. Improved slot die coating system Claim 10 , in which the coating head bodies carry out intermittent coating through the feed modules.

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