TW202114782A - Slit-type coating die and slit-type coating device having the slit-type coating die capable of achieving an optimized configuration according to fluid properties of different coatings or the coatings to be formed on different substrates - Google Patents

Abstract

The present invention provides a slit-type coating device, which has a slit-type coating die and a conveyor belt. The conveyor belt passes directly under the slit-type coating die. The slit-type coating die has a first flat die sheet, a second flat die sheet, and a plurality of clipping pieces detachably arranged between the first flat die sheet and the second flat die sheet. The plurality of clipping pieces together form a slit. The advantages of the present invention is that the slit-type coating device includes the slit-type coating die, and the slit-type coating die has a plurality of replaceable clipping pieces, such that an optimized configuration can be achieved according to fluid properties of different coatings or the coatings to be formed on different substrates without arranging a various of slit-type coating dies of specific purposes in the slit-type coating device. Thus, the application of the slit-type coating device is no longer limited to a single product.

Description

Slit-type coating die and slit-type coating device with the slit-type coating die

This creation is about a slit-type coating die and a slit-type coating device, which can form a uniform thin layer of liquid material on a substrate.

Precision coating technology is one of the most critical production technologies in many optoelectronic and energy industries. The production process of many cutting-edge products must rely on stable and mature precision coating technology to make various key components. One of the existing coating technologies is slit coating, in which the coating is continuously discharged from a slit of the coating die, and the substrate passes under the slit, so that the coating discharged from the slit can be Evenly cover the substrate to form a coating.

However, the existing slit coating device is only equipped with a single specification slit coating die, so it can only be applied to a single coating, and the range of application of the slit coating device is limited. Flexible. Especially when the rheological properties of the paint change a lot or the width of the coating width changes frequently, it is necessary to configure a plurality of slit-type coating die heads of different specifications, which causes the overall production cost of the slit-type coating device to remain high.

In view of this, proposing a better improvement plan is a problem that the industry needs to solve urgently.

The main purpose of this creation is to propose a slit-type coating die and a slit-type coating device with the slit-type coating die, wherein the slit-type coating die has a variety of replaceable clips, Therefore, different types of slits can be formed, thereby adapting to the fluid properties of different coatings or optimizing the configuration of the coatings to be formed on different substrates.

In order to achieve the above purpose, the slit coating die proposed in this creation has: A first flat die sheet, which is formed with a liquid inlet; A second flat die piece, which is spaced apart from the first flat die piece; and A plurality of clamping pieces are detachably arranged between the first flat mold piece and the second flat mold piece; the clamping pieces jointly form a slit, and the slit is connected to the liquid inlet.

In order to achieve the above-mentioned purpose, the slit-type coating device proposed in this creation has: The slit coating die as described above; and A conveyor belt that passes directly under the slit coating die.

Therefore, the advantage of this creation is that the slit-type coating device includes a slit-type coating die, and the slit-type coating die has a variety of replaceable clips, so it can be based on the fluid properties of different coatings. Or the coatings to be formed on different substrates can be optimally configured, instead of setting up a variety of specific purpose slit coating dies in the slit coating device, not only the slit coating device can be applied The field is no longer limited to a single product, but can also reduce the cost of production and maintenance of the slit coating device.

In the slit coating die described above, the clips include: A liquid inlet clip, which is detachably arranged between the first flat die sheet and the second flat die; the liquid inlet clip forms a perforation, which penetrates the liquid inlet clip and communicates with the liquid inlet Mouth; and A steady flow clip, which is detachably arranged between the first flat die piece and the second flat die piece, and the steady flow clip forms a steady flow groove, which communicates with the slit, and the stable The width of the runner is the same as the width of the slit; Wherein, the slit is formed between the liquid inlet clip and the steady flow clip, and the perforation of the liquid inlet clip communicates with the slit.

In the aforementioned slit-type coating die, the clips further include a spacer clip, which is detachably disposed between the liquid inlet clip and the steady flow clip; the spacer clip has Two spacers are arranged at intervals, the two spacers separate the liquid inlet clip and the steady flow clip, and the two spacers, the liquid inlet clip and the steady flow clip surround to form the slit.

In the slit coating die described above, the width of the perforation of the liquid inlet clip is equal to the width of the slit.

In the aforementioned slit-type coating die, the upper side of the perforation of the liquid-in clip is gradually lowered from the center to both sides.

In the aforementioned slit coating die, the lower side of the perforation of the liquid inlet clip gradually decreases from the center to the two sides, and the upper side of the perforation decreases to the two sides to a greater degree than The degree to which the lower side gradually decreases toward both sides.

In the aforementioned slit-type coating die, the lower side of the perforation of the liquid-in clip is gradually lowered from the first flat die sheet to the second flat die sheet.

In the slit-type coating die described above, the liquid inlet clip is further formed with: An inner side surface facing the direction of the steady flow clip, and the extending direction of the perforation is perpendicular to the inner side surface of the liquid inlet clip; and A diffusion groove located on the inner side of the liquid inlet clip and recessed in a direction away from the steady flow clip; the perforation of the liquid inlet clip communicates with the diffusion groove, and the diffusion groove communicates with the slit, And the width of the diffusion groove is equal to the width of the slit.

In the aforementioned slit-type coating die, the cross section of the diffusion groove is rectangular, trapezoidal, semicircular, or inverted semi-drop shape.

In the aforementioned slot-type coating die, the lower side of the flow stabilizing groove of the flow stabilizing clip gradually rises from the first flat die sheet to the second flat die sheet.

In the aforementioned slit coating die, the cross section of the flow stabilizing groove is rectangular, trapezoidal, semicircular, or inverted semi-drop shape.

In the aforementioned slot-type coating die, the steady flow groove of the steady flow clip penetrates the steady flow clip.

Please refer to Figure 1 to Figure 4 first. The present invention proposes a slit-type coating device 1, which may have a slit-type coating die 10 and a conveyor belt 20. The slit-type coating die 10 supplies the coating in the form of a liquid film, and the conveyor belt 20 passes directly under the slit-type coating die 10, thereby transporting a substrate A to bear the slit-type coating die 10 Supply of paint. In other embodiments, the slit-type coating device 1 may have a slit-type coating die 10 and a carrying table. The carrying table is located directly under the slit-type coating die 10 and can be opposite to the slit-type coating die 10 The coating die 10 moves, so that a substrate A carried by it can also bear the coating material supplied by the slit coating die 10. In addition, the slit-type coating die 10 can also be moved relative to the stage.

Then please refer to Figure 3 to Figure 6. The slot coating die 10 has a first flat die piece 11, a second flat die piece 12, and a plurality of clips. The clip is detachably arranged between the first flat die piece 11 and the second flat die piece 12. In this way, the operator can easily change the type of paint and replace it with a clip with an appropriate structure to achieve the best uniform effect. The first flat die piece 11 is formed with a liquid inlet 110. The first flat die piece 11 and the second flat die piece 12 are spaced apart, and the clips are located between the first flat die piece 11 and the second flat die piece 12. In other words, the first flat die piece 11 and the second flat die piece 12 are separated by the clips, and the second flat die piece 12 and the clips are parallel to the first flat die piece 11. The clips together form a slit 14, and the slit 14 is connected to the liquid inlet 110.

Then please refer to Figure 2 and Figure 3. The clips include a liquid inlet clip 131, a spacer clip 132, and a steady flow clip 133. In this embodiment, the first flat die piece 11, the liquid inlet clip 131, the spacer clip 132, the steady flow clip 133, and the second flat die piece 12 are fixed in series by a plurality of long rods in series. In this way, the liquid inlet clip 131, the spacer clip 132, and the steady flow clip 133 can be quickly and conveniently installed between the first flat die plate 11 and the second flat die plate 12 or from the first flat die plate. 11 and the second flat die piece 12 is disassembled.

The liquid inlet clip 131 forms an inner side surface and a through hole 1310. The inner side of the liquid inlet clip 131 is the side facing the steady flow clip 133. The perforation 1310 penetrates the liquid clamping piece 131 and is connected to the liquid inlet 110, and the penetrating direction of the perforation 1310 is perpendicular to the inner surface of the liquid clamping piece 131.

Please refer to Figure 4, Figure 7, and Figure 8. In the first aspect of the liquid insertion clip 131, the width of the perforation 1310 of the liquid insertion clip 131 is equal to the width of the slit 14. The contour of the perforation 1310 may be rectangular, but is not limited to this, and the lower side of the perforation 1310 may also be gradually lowered from the center to both sides. As shown in Figure 8, not only the lower side of the perforation 1310 is gradually lowered from the center to the sides, the upper side is also lowered from the center to the sides, and the upper side of the perforation 1310 is gradually lowered to the sides. The degree is greater than the degree that the lower side gradually lowers to the sides, and forms a shape similar to a clothes hanger. On the other hand, if viewed from the cross section of the perforation 1310, the lower side of the perforation 1310 of the liquid inserting clip 131 is gradually lowered from the first flat die piece 11 to the second flat die piece 12.

Then please refer to Figure 9 and Figure 10. In the second aspect of the liquid inlet clip 131A, the width of the perforation 1310A of the liquid inlet clip 131A is much smaller than the width of the slit, but the liquid inlet clip 131A also forms a diffusion groove 1311A. The perforation 1310A is located in the diffusion groove 1311A, and is preferably located in the center of the diffusion groove 1311A. The diffusion groove 1311A is located on the inner side of the liquid inlet clip 131A and is recessed in a direction away from the steady flow clip 133. The perforation 1310A communicates with the diffusion groove 1311A, and the diffusion groove 1311A communicates with the slit, and the width of the diffusion groove 1311A is equal to the width of the slit. In order to improve the uniformity of the liquid film formed by the coating, clamps with diffusion grooves of different shapes can be prepared in advance, and the clamps with the diffusion grooves of appropriate shape can be selected according to different fluid properties (such as viscosity or surface tension). Specifically, it can be divided into a rectangular diffusion groove 1311A, a trapezoidal diffusion groove, a semicircular diffusion groove 1311B (as shown in FIG. 11), or an inverted semi-drop-shaped diffusion groove 1311C (as shown in FIG. 11). 12) and so on, and not limited to this.

Therefore, if the first aspect of the liquid inlet clip 131 (as shown in FIG. 8) and the second aspect of the liquid inlet clip 131A (as shown in FIG. 10) are compared, the perforation in the liquid inlet clip 131 1310 is equivalent to the diffusion tank 1311A of the liquid inlet clip 131A, both of which are used to diffuse and distribute the paint that has just entered the slit coating device in the slit.

Then please refer to Figure 13. The spacer clip 132 is detachably disposed on the inner surface of the liquid inlet clip 131. The spacer clip 132 is detachably located between the liquid inlet clip 131 and the steady flow clip 133, and is used to separate the liquid inlet clip 131 and the steady flow clip 133. The spacing clip 132 may have two spacing portions 1321 arranged at intervals, and a connecting portion 1322 that connects the two spacing portions 1321 laterally. In other words, the spacer clip 132 is an inverted U-shaped frame, and the slit is formed in the space surrounded by the inverted U-shaped. In the spacer clip 132, the shape of the lower edge of the connecting portion 1322 corresponds to the upper edge of the perforation 1310 of the first aspect of the liquid insertion clip 131, and both sides are also gradually lowered. However, in this embodiment, the lower edge of the connecting portion 1322 is horizontal. With different thicknesses of the spacer clips 132, different distances can be spaced to form slits of different thicknesses.

Then please refer to Figure 14 and Figure 15. The steady flow clip 133 also forms an inner side surface, and the inner side of the steady flow clip 133 is the side facing the liquid inlet clip 131. In the first aspect of the steady flow clip 133, the steady flow clip 133 is formed with a steady flow groove 1330. The steady flow groove 1330 penetrates the steady flow clip 133 and communicates with the slit. The width is equal to the width of the slit. In the cross section of the flow stabilizing groove 1330, along the direction from the first flat die piece 11 to the second flat die piece 12, the upper and lower dimensions of the flow stabilizing groove 1330 are tapered. For example, the lower side of the steady flow groove 1330 of the steady flow clip 133 gradually increases from the first flat die piece 11 to the second flat die piece 12. In the first aspect of the steady flow clip 133, the upper side of the steady flow groove 1330 is gradually lowered from the first flat die piece 11 to the second flat die piece 12.

Then please refer to Figure 16 and Figure 17. In the second aspect of the steady flow clip 133A, the steady flow clip 133A is formed with a steady flow groove 1330A. The steady flow groove 1330A is located on the inner surface of the steady flow clip 133A and communicates with the slit, and the steady flow groove 1330A does not penetrate the steady flow clip 133A. Specifically, in order to further improve the uniformity of the liquid film, it is also possible to prepare clips with different shapes of steady flow grooves in advance, and select the appropriate shape of the steady flow groove corresponding to different fluid properties (such as viscosity or surface tension) Of clips. Specifically, the cross-section can be divided into rectangular steady flow trough 1330A, trapezoidal steady flow trough, semicircular steady flow trough 1330B (as shown in Figure 18), or inverted semi-drop-shaped steady flow trough 1330C (As shown in Figure 19) and so on, and not limited to this.

Then please refer to Figures 1 to 4 again. When the liquid inlet clip 131, the spacer clip 132, and the steady flow clip 133 are fixed in sequence, the inner side of the liquid inlet clip 131, the spacer 1321 of the spacer clip 132, and the steady flow clip 133 A slit 14 is formed on the inner side surface, and a slit opening is formed on the lower side of the slit coating die 10. The paint can enter the slit-type coating die 10 through the liquid inlet 110 of the first flat die piece 11, and then can pass through the perforation 1310 of the liquid inlet clip 131. When the paint enters the liquid inlet clip 131, it can be diffused and distributed by the hanger-shaped perforation 1310 in the liquid inlet clip 131 of the first form, or by the diffusion groove 1311A of the second form of liquid inlet clip 131 (Shown in Figure 10) by the diffusion distribution. Subsequently, the paint will evenly enter between the spacers 1321 of the spacer clip 132, and the pressure of the paint in the transverse direction is similar. Then, the paint can enter the steady flow groove 1330 of the steady flow clip 133, further diffuse and distribute again, and finally return to the slit 14 again. Finally, the paint is discharged from the slit and covered on the substrate A.

In other embodiments, after the liquid inlet clip 131, the spacer clip 132, and the steady flow clip 133 are combined with the first flat die plate 11 and the second flat die plate 12, the slit opening can be oriented obliquely or laterally. It can even be oriented diagonally upward to optimize the configuration according to the fluid properties of different coatings.

In other embodiments, the clip may only have the liquid inlet clip 131 and the steady flow clip 133 without the front spacer clip 132, and a recess is formed on the liquid inlet clip 131 or the steady flow clip 133. For example, if the recessed portion is formed on the liquid inlet clip 131, the recessed portion of the liquid inlet clip 131 constitutes the three side walls of the slit, and the steady flow clip 133 constitutes the fourth side wall of the slit, thereby enclosing the slit The boundary.

In summary, the slit-type coating device 1 of the present invention includes a slit-type coating die 10, and the slit-type coating die 10 has a variety of replaceable clips, so it can be based on different coatings. The fluid properties of different substrates or the coatings to be formed on different substrates A are optimized, instead of having to set up a variety of specific purpose slit coating die 10 in the slit coating device 1, not only the slit coating The application field of the coating device 1 is no longer limited to a single product, and the production and maintenance costs of the slit coating device 1 can also be reduced.

1: Slit coating device 10: Slit coating die 11: The first flat die 110: Liquid inlet 12: The second flat die 131, 131A: first clip 1310, 1310A: perforation ... 1311A, 1311B, 1311C: diffusion tank 132: Spacer clip 1321: Interval 1322: connecting part 133, 133A: steady flow clip 1330, 1330A, 1330B, 1330C: steady flow tank 14: slit 20: Conveyor belt A: Substrate

Figure 1 is a three-dimensional schematic diagram of the slit-type coating device created. Figure 2 is an exploded schematic diagram of the created slit coating die. Figure 3 is a schematic cross-sectional view of the slit-type coating die created. Figure 4 is an enlarged cross-sectional view of the created slit coating die. Figure 5 is a schematic diagram of the first flat die sheet of the slit coating die head created. Figure 6 is a schematic diagram of the second flat die sheet of the slit coating die head created. FIG. 7 is a schematic diagram of the first aspect of the liquid inlet clip of the slit-type coating die created. Fig. 8 is a cross-sectional view of the first aspect of the liquid inlet clip of the slit-type coating die created. Fig. 9 is a schematic diagram of the second aspect of the liquid inlet clip of the slit coating die created. Fig. 10 is a cross-sectional view of the second aspect of the liquid inlet clip of the created slit coating die. Fig. 11 is a cross-sectional view of the third aspect of the liquid inlet clip of the created slit coating die. Fig. 12 is a cross-sectional view of the fourth aspect of the liquid inlet clip of the created slit coating die. Figure 13 is a schematic diagram of the spacer clip of the created slit coating die. FIG. 14 is a schematic diagram of the first aspect of the steady flow clip of the slit-type coating die created. Figure 15 is a cross-sectional view of the first aspect of the steady flow clip of the slit coating die created. Fig. 16 is a schematic diagram of the second aspect of the steady flow clip of the slit-type coating die created. Figure 17 is a cross-sectional view of the second aspect of the steady flow clip of the slit coating die created. Figure 18 is a cross-sectional view of the third aspect of the steady flow clip of the slit coating die created. Figure 19 is a cross-sectional view of the fourth aspect of the stabilizing clip of the slit-type coating die created.

10: Slit coating die

11: The first flat die

110: Liquid inlet

12: The second flat die

131: Liquid clip

1310: perforation

132: Spacer clip

133: Steady Flow Clip

1330: steady flow trough

14: slit

Claims (12)

A slit type coating die head, which has: A first flat die sheet, which is formed with a liquid inlet; A second flat die piece, which is spaced apart from the first flat die piece; and A plurality of clamping pieces are detachably arranged between the first flat mold piece and the second flat mold piece; the clamping pieces jointly form a slit, and the slit is connected to the liquid inlet. The slit coating die according to claim 1, wherein the clips include: A liquid inlet clip, which is detachably arranged between the first flat die sheet and the second flat die; the liquid inlet clip forms a perforation, which penetrates the liquid inlet clip and communicates with the liquid inlet Mouth; and A steady flow clip, which is detachably arranged between the first flat die piece and the second flat die piece, and the steady flow clip forms a steady flow groove, which communicates with the slit, and the stable The width of the runner is the same as the width of the slit; Wherein, the slit is formed between the liquid inlet clip and the steady flow clip, and the perforation of the liquid inlet clip communicates with the slit. The slit coating die according to claim 2, wherein the clips further comprise a spacer clip, which is detachably arranged between the liquid inlet clip and the steady flow clip; the spacer The clip has two spacers arranged at intervals, the two spacers separate the liquid inlet clip and the steady flow clip, and the two spacers, the liquid inlet clip and the steady flow clip surround to form the slit. The slit-type coating die according to claim 2 or 3, wherein the width of the perforation of the liquid inlet clip is equal to the width of the slit. The slit-type coating die according to claim 4, wherein the upper side of the perforation of the liquid-inlet clip is gradually lowered from the center to both sides. The slit-type coating die according to claim 5, wherein the lower side of the perforation of the liquid-inlet clip is gradually lowered from the center to both sides, and the upper side of the perforation is gradually lowered to the both sides The degree of is greater than the degree that the lower side gradually decreases toward both sides. The slit coating die according to claim 4, wherein the lower side of the perforation of the liquid-inlet clip is gradually lowered from the first flat die sheet toward the second flat die sheet. The slit-type coating die according to claim 2 or 3, wherein the liquid inlet clip is further formed with: An inner side surface facing the direction of the steady flow clip, and the extending direction of the perforation is perpendicular to the inner side surface of the liquid inlet clip; and A diffusion groove located on the inner side of the liquid inlet clip and recessed in a direction away from the steady flow clip; the perforation of the liquid inlet clip communicates with the diffusion groove, and the diffusion groove communicates with the slit, And the width of the diffusion groove is equal to the width of the slit. The slit coating die according to claim 8, wherein the cross section of the diffusion groove is rectangular, trapezoidal, semicircular, or inverted semi-drop shape. The slit coating die according to claim 2 or 3, wherein the lower side of the steady flow groove of the steady flow clip is gradually higher from the first flat die sheet toward the second flat die sheet . The slit coating die according to claim 10, wherein the cross section of the flow stabilizing groove is rectangular, trapezoidal, semicircular, or inverted semi-drop shape. A slit type coating device, which has: A slit-type coating die according to any one of claims 1 to 11; and A conveyor belt that passes directly under the slit coating die.

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