TWM589073U - Slot-die coating head and slot-die coating device having the same - Google Patents

Abstract

This creation proposes a slit coating device, which has a slit coating die and a conveyor belt, and the conveyor belt passes directly under the slit coating die. The slot-type coating die has a first flat die piece, a second flat die piece, and a plurality of clips detachably disposed between the first flat die piece and the second flat die piece. The clips together form a slit. The advantage of this creation is that the slit coating device includes a slit coating die, and the slit coating die has a variety of replaceable clips, so it can be based on the fluid properties of different coatings or different The coating to be formed on the substrate is optimally configured without having to provide a variety of specific-purpose slit-type coating dies in the slit-type coating device, which not only allows the slit-type coating device to be applied in the field No longer limited to a single product.

Description

Slot-type coating die and slot-type coating device having the slot-type coating die

This creation relates to a slit coating die and a slit 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 photovoltaic 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, which continuously discharges the paint from a slit of the coating die, and the base material passes under the slit, so that the paint discharged from the slit can Evenly cover the substrate to form a coating.

However, in the existing slot coating device, only a single specification slot coating die is configured, so it can only be applied to a single coating, and the range of application of the slot coating device in conjunction with it is limited. Flexible. Especially when the rheological properties of the paint change a lot or the width of the coating width changes frequently, multiple slit coating dies with different specifications must be configured, resulting in a high production cost of the slit coating device as a whole.

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

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

In order to achieve the above purpose, the slot coating die proposed in this creation has: A first flat die, 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 clips are detachably disposed between the first flat die and the second flat die; the clips collectively form a slit, and the slit communicates with the liquid inlet.

In order to achieve the above purpose, the slit coating device proposed in this work has: A slit coating die as described above; and A conveyor belt passes directly under the slot coating die.

Therefore, the advantage of this creation is that the slit coating device includes a slit coating die, and the slit coating die has a variety of replaceable clips, so it can be based on the fluid properties of different coatings Or to optimize the configuration of the coatings to be formed on different substrates, without having to set a variety of special-purpose slit-type coating dies in the slit-type coating device, not only for the application of the slit-type coating device 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.

As mentioned above in the slot coating die, the clips include: A liquid inlet clip, which is detachably disposed between the first flat die 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 flow stabilizing clip, which is detachably arranged between the first flat die piece and the second flat die piece, and the flow stabilizing clip piece forms a flow stabilizing groove which communicates with the slit and the stabilizing The width of the groove is the same as the width of the slit; Wherein, the slit is formed between the liquid inlet clip and the steady flow clamp, and the perforation of the liquid inlet clip communicates with the slit.

In the slit coating die described above, 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 spaced portions spaced apart, the two spaced portions space the liquid inlet clip and the flow stabilizing clip, and the two spaced portions surround the liquid inlet clip and the flow stabilizing clip to form the slit.

As described above in the slit-type coating die, the width of the perforation of the liquid inlet clip is equal to the width of the slit.

In the slit coating die as described above, the upper side of the perforation of the liquid inlet clip gradually decreases from the center to both sides.

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

In the slit coating die as described above, the lower side of the perforation of the liquid inlet clip gradually decreases from the first flat die to the second flat die.

As described above in the slit-type coating die, the liquid inlet clip is further formed with: An inner side facing the direction of the steady flow clip, and the extending direction of the perforation is perpendicular to the inner side of the liquid inlet clip; and A diffusion groove located on the inner side of the liquid inlet clip and recessed 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.

As described above in the slit-type coating die, the cross section of the diffusion groove is rectangular, trapezoidal, semicircular, or inverted semi-droplet-shaped.

In the slit coating die as described above, the lower side of the flow stabilizing groove of the flow stabilizing clip gradually rises from the first flat die toward the second flat die.

As described above in the slit-type coating die, the cross section of the stable flow channel is rectangular, trapezoidal, semicircular, or inverted semi-droplet-shaped.

In the slit coating die as described above, the flow stabilizing groove of the flow stabilizing clip passes through the flow stabilizing clip.

Please refer to Figures 1 to 4 first. This creation proposes a slit-type coating device 1, which can have a slit-type coating die 10 and a conveyor belt 20. The slit-type coating die 10 supplies the coating material in the form of a liquid film, and the conveyor belt 20 passes directly under the slit-type coating die 10, thereby conveying a substrate A to withstand 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 carrier table, the carrier table is located directly below the slit-type coating die 10 and can be opposite to the slit-type The coating die 10 moves, thereby also allowing a substrate A to be carried to withstand the coating material supplied by the slit coating die 10. In addition, the slit-type coating die 10 may be moved relative to the carrier table.

Then please refer to FIG. 3 to FIG. 6. The slot coating die 10 has a first flat die 11, a second flat die 12, and a plurality of clips. The clip piece is detachably disposed 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 of appropriate structure to achieve the best uniform effect. The first flat die 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 11 and the second flat die 12 are separated by the clips, and the second flat die 12 and the clips are parallel to the first flat die 11. The clips form a slit 14 in common, and the slit 14 communicates with the liquid inlet 110.

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

The liquid inlet clip 131 forms an inner side and a perforation 1310. The inner side of the liquid inlet clip 131 is the side facing the steady flow clip 133. The perforation 1310 penetrates into the liquid clip 131 and communicates with the liquid inlet 110, and the penetration direction of the perforation 1310 is perpendicular to the inner surface of the liquid clip 131.

Then please refer to FIG. 4, FIG. 7, and FIG. 8. In the first aspect of the liquid inlet clip 131, the width of the through hole 1310 of the liquid inlet clip 131 is equal to the width of the slit 14. The outline of the through hole 1310 may be rectangular, but not limited to this, and the lower side of the through hole 1310 may gradually decrease from the center to both sides. As shown in FIG. 8, not only the lower side of the perforation 1310 is gradually lowered from the center to both sides, but also the upper side is gradually lowered from the center to both sides, and the upper side of the perforation 1310 is gradually lowered to both sides. The degree is greater than the degree that the lower side gradually decreases toward both sides, and forms a hanger-like shape. On the other hand, when viewed from the cross section of the perforation 1310, the lower side of the perforation 1310 of the liquid inlet clip 131 gradually decreases from the first flat die 11 to the second flat die 12.

Next, please refer to FIGS. 9 and 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 further forms a diffusion groove 1311A. The through hole 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 away from the steady flow clip 133. The through hole 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, clips with diffusion grooves of different shapes can be prepared in advance, and clips with diffusion grooves of appropriate shapes are selected corresponding 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 semi-circular diffusion groove 1311B (as shown in FIG. 11), or an inverted semi-droplet-shaped diffusion groove 1311C (as shown in FIG. 12) etc., and not limited to this.

Therefore, if the liquid inlet clip 131 of the first aspect (as shown in FIG. 8) and the liquid inlet clip 131A of the second aspect (as shown in FIG. 10) are compared, the perforations in the liquid inlet clip 131 1310 corresponds to the diffusion groove 1311A of the liquid inlet clip 131A, both of which are used for diffusing and distributing the paint that has just entered the slit-type coating device into the slit.

Then please refer to Figure 13. The spacer clip 132 is detachably disposed on the inner side of the liquid inlet clip 131. The spacer clip 132 is detachably located between the liquid inlet clip 131 and the flow stabilizing clip 133, and is used to space the liquid clip 131 and the flow stabilizing clip 133. The spacing clip 132 may have two spacing portions 1321 arranged at intervals, and a connecting portion 1322 connecting 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-shape. 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 clip 131, and both sides are 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 separated to form slits with different thicknesses.

Next, please refer to FIGS. 14 and 15. The flow stabilizing clip 133 is also formed with an inner side. The inner side of the flow stabilizing clip 133 is the side facing the liquid inlet clip 131. In the first aspect of the flow stabilizing clip 133, the flow stabilizing clip 133 is formed with a flow stabilizing groove 1330, the flow stabilizing groove 1330 penetrates the flow stabilizing clip 133, and communicates with the slit, and the flow stabilizing groove 1330 The width is equal to the width of the slit. In the cross section of the flow stabilizing groove 1330, the size of the flow stabilizing groove 1330 is gradually reduced in the direction of the first flat die piece 11 toward the second flat die piece 12. For example, the lower side of the flow stabilizing groove 1330 of the flow stabilizing clip 133 gradually rises from the first flat die piece 11 toward the second flat die piece 12. In the first aspect of the flow stabilizing clip 133, the upper side of the flow stabilizing groove 1330 gradually decreases from the first flat die 11 to the second flat die 12.

Then please refer to FIG. 16 and FIG. 17. In the second aspect of the flow stabilizing clip 133A, the flow stabilizing clip 133A is formed with a flow stabilizing groove 1330A. The flow stabilizing groove 1330A is located on the inner side of the flow stabilizing clip 133A and communicates with the slit, and the flow stabilizing groove 1330A does not penetrate the flow stabilizing 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 flow stabilizing grooves in advance, and select a flow stabilizing groove with an appropriate shape corresponding to different fluid properties (such as viscosity or surface tension). Clips. Specifically, the cross-sectional distinction can be divided into a rectangular steady flow groove 1330A, a trapezoidal steady flow groove, a semicircular steady flow groove 1330B (as shown in FIG. 18), or an inverted semi-droplet shaped steady flow groove 1330C (As shown in Figure 19) And so on, and not limited to this.

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

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

In other embodiments, the clip may only have the liquid inlet clip 131 and the flow stabilizing clip 133, but not the front spacing clip 132, and a recess is formed on the liquid inlet clip 131 or the flow stabilizing clip 133. For example, if the depressed portion is formed on the liquid inlet clip 131, the depressed 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 encircling the slit 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 the different substrates or the coatings to be formed on different substrates A are optimally configured without having to provide a variety of special-purpose slit-type coating dies 10 in the slit-type coating device 1, not only to allow the slit-type The application area of the coating device 1 is no longer limited to a single product, and the cost of production and maintenance of the slit coating device 1 can also be reduced.

1‧‧‧Slit coating device 10‧‧‧slot coating die 11‧‧‧The first flat die 110‧‧‧ liquid inlet 12‧‧‧second flat die 131、131A‧‧‧First clip 1310、1310A‧‧‧Perforation 1311A, 1311B, 1311C‧‧‧Diffusion tank 132‧‧‧Interval clip 1321‧‧‧Space 1322‧‧‧Connect 133, 133A‧‧‧stable clip 1330, 1330A, 1330B, 1330C 14‧‧‧ slit 20‧‧‧Conveyor belt A‧‧‧Substrate

FIG. 1 is a perspective schematic view of a slit-type coating device created in this invention. Fig. 2 is an exploded schematic view of the slot-type coating die created. Fig. 3 is a schematic cross-sectional view of a slot-type coating die created by the author. Fig. 4 is an enlarged cross-sectional view of the slot-type coating die created by the author. Fig. 5 is a schematic view of the first flat die of the slot-coating die created in this invention. Fig. 6 is a schematic view of the second flat die of the slot-coating die created in this invention. FIG. 7 is a schematic diagram of the first aspect of the liquid inlet clip of the slot-type coating die created. FIG. 8 is a cross-sectional view of the first aspect of the liquid-filled clip of the slit-type coating die created in the present invention. FIG. 9 is a schematic diagram of the second aspect of the liquid-filled clip of the slot-type coating die created. FIG. 10 is a cross-sectional view of the second aspect of the liquid-filled clip of the slit-type coating die created in this invention. FIG. 11 is a cross-sectional view of the third aspect of the liquid-filled clip of the slit-type coating die created in the present invention. FIG. 12 is a cross-sectional view of the fourth aspect of the liquid-filled clip of the slit-type coating die created in the present invention. FIG. 13 is a schematic diagram of a spacer clip of a slot-type coating die created in the present invention. FIG. 14 is a schematic diagram of the first aspect of the steady flow clip of the slot-type coating die created. FIG. 15 is a cross-sectional view of the first aspect of the steady flow clip of the slit-type coating die created in the present invention. FIG. 16 is a schematic diagram of the second aspect of the steady flow clip of the slot-type coating die created. FIG. 17 is a cross-sectional view of the second aspect of the steady flow clip of the slot-type coating die created in the present invention. FIG. 18 is a cross-sectional view of the third aspect of the steady flow clip of the slit-type coating die created in the present invention. FIG. 19 is a cross-sectional view of the fourth aspect of the steady flow clip of the slot-type coating die created in the present invention.

10‧‧‧slot coating die

11‧‧‧The first flat die

110‧‧‧ liquid inlet

12‧‧‧second flat die

131‧‧‧Liquid clip

1310‧‧‧Perforation

132‧‧‧Interval clip

133‧‧‧stable clip

1330‧‧‧Stable flow channel

14‧‧‧ slit

Claims (12)

A slit-type coating die, which has: A first flat die, 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 clips are detachably disposed between the first flat die and the second flat die; the clips collectively form a slit, and the slit communicates with the liquid inlet. The slit-type coating die according to claim 1, wherein the clips include: A liquid inlet clip, which is detachably disposed between the first flat die 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 flow stabilizing clip, which is detachably arranged between the first flat die piece and the second flat die piece, and the flow stabilizing clip piece forms a flow stabilizing groove which communicates with the slit and the stabilizing The width of the groove is the same as the width of the slit; Wherein, the slit is formed between the liquid inlet clip and the steady flow clamp, 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 disposed between the liquid inlet clip and the steady flow clip; the gap The clip has two spaced portions spaced apart, the two gaps space the liquid inlet clip and the flow stabilizing clip, and the two partitions surround the liquid inlet clip and the flow stabilizing clip 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 gradually decreases 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 gradually decreases from the center to both sides, and the upper side of the perforation gradually decreases to both sides The degree is greater than the degree of the lower side gradually lowering toward both sides. The slit-type coating die according to claim 4, wherein the lower side of the perforation of the liquid inlet clip gradually decreases from the first flat die toward the second flat die. The slit-type coating die according to claim 2 or 3, wherein the liquid inlet clip is further formed with: An inner side facing the direction of the steady flow clip, and the extending direction of the perforation is perpendicular to the inner side of the liquid inlet clip; and A diffusion groove, which is located on the inner side of the liquid inlet clip and is 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-type coating die according to claim 8, wherein the cross section of the diffusion groove is rectangular, trapezoidal, semicircular, or inverted semi-droplet-shaped. The slit coating die according to claim 2 or 3, wherein the lower side of the flow stabilizing groove of the flow stabilizing clip gradually rises from the first flat die toward the second flat die . The slit-type coating die according to claim 10, wherein the cross section of the flow stabilizing groove is rectangular, trapezoidal, semicircular, or inverted semi-droplet-shaped. A slit-type coating device, which has: As described in any one of claims 1 to 11, the slit coating die; and A conveyor belt passes directly under the slot coating die.

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