A three-arm star-shaped multi-block sub-matte coating coating with a slot type extrusion structure

Abstract

This utility model discloses a three-armed star-shaped multi-segment matte coating slit extrusion structure for slit coating, applicable to the field of slit coating. It includes a left die and a right die, connected by multiple long bolts. The upper surface of the left die and the inner top of the right die are in contact. A gasket is held between the left and right dies, and multiple elastic tubes corresponding to the long bolts are fixedly embedded within the gasket. Multiple threaded holes corresponding to the elastic tubes are drilled on the right die. The long bolts movably pass through the elastic tubes and are threadedly connected to the threaded holes. The left and right dies and the gasket form a coating cavity. A feeding cavity is drilled inside the right die. This design, through the adjustable width of the gasket, allows for adjustment of the coating cavity size without disassembling the left and right dies, effectively reducing operational complexity and improving the ease of use of coating equipment employing this extrusion structure.

Description

Technical Field

[0001] This utility model relates to the field of slot coating, and in particular to a slot extrusion structure for coating a three-armed star-shaped multi-block matte coating. Background Technology

[0002] The three-arm star design refers to a coating equipment configuration, specifically one equipped with three star-shaped coating arms and a UV curing unit. This type of machine can be used to produce matte UV-curable resin coatings, commonly used for coating furniture, automotive parts, and other products. Its advantages lie in its ability to achieve efficient and precise coating operations, ensuring a uniform and consistent coating. Furthermore, it rapidly hardens the coating using UV curing technology, giving it excellent physical and chemical properties to meet the coating quality requirements of industrial applications.

[0003] There are various methods for applying resin coatings, such as slot coating and roller coating. For slot coating, the coating head typically uses a spacer between two dies to create a cavity through which the coating liquid can pass. For example, Chinese Patent CN109865633B discloses a cavity structure for a slot coating head suitable for fluid coating. However, this method can only accommodate one coating thickness. When the coating thickness changes, the extrusion head needs to be disassembled and spacers of different thicknesses replaced to change the cavity size. This method is cumbersome and affects the ease of use of the coating equipment. Utility Model Content

[0004] The core of this invention lies in solving the problem of the high degree of complexity in adjusting the size of the coating cavity in the prior art by setting an adjustable shim.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A slit extrusion structure for applying a three-armed star-shaped multi-segment matte coating includes a left die and a right die. The left and right dies are connected by multiple long bolts, and the upper surface of the left die is in contact with the inner top of the right die. A gasket is held between the left and right dies, and multiple elastic tubes corresponding to the multiple long bolts are fixedly embedded in the gasket. Multiple threaded holes corresponding to the multiple elastic tubes are drilled on the right die. The multiple long bolts movably pass through the multiple elastic tubes and are threadedly connected to the threaded holes. The left die, the right die, and the gasket form a coating cavity. A feeding cavity is drilled inside the right die, and the end of the feeding cavity is connected to the coating cavity. The gasket includes a fixed gasket layer that is fixedly connected to the right die head, a movable gasket layer that abuts against the left die head, and a transition layer that is fixedly connected between the fixed gasket layer and the movable gasket layer. Both the fixed gasket layer and the movable gasket layer are rigid structures, while the transition layer is an elastic structure. Guide rods are fixedly connected to the four corners of the end face of the movable gasket layer near the fixed gasket layer, and the ends of the guide rods are movably inserted into the fixed gasket layer.

[0007] Furthermore, the width of the feeding chamber and coating chamber gradually decreases, the lower opening of the feeding chamber is located below the gasket, and the bottom of the gasket is flush with the upper edge of the bottom of the feeding chamber.

[0008] Furthermore, the long bolt includes a threaded section and a smooth section located in the middle of the threaded section. The smooth section corresponds to the elastic tube, and the length of the smooth section is 2-5 times the width of the gasket.

[0009] Optionally, the moving pad is made of ferromagnetic material, and an electromagnet is embedded inside the left mold head. When the electromagnet is energized, it generates a magnetic attraction force on the moving pad.

[0010] Optionally, the transition layer is a hollow structure, and an L-shaped liquid guiding hole is drilled at the upper end of the fixed pad layer. An injection unit is also fixedly connected to the upper end of the fixed pad layer. The L-shaped liquid guiding hole and the injection unit are interconnected, and the interior of the transition layer is filled with limiting liquid through the injection unit.

[0011] Furthermore, the liquid injection unit includes a liquid guide tube fixedly connected to the upper end of the gasket, a liquid injection tube fixedly connected to the upper end of the right mold head, and a sealing plug covering the top of the liquid injection tube. The liquid guide tube is fixedly connected through the upper end of the right mold head and is flush with the upper surface of the right mold head.

[0012] Compared with existing technologies, the advantages of this utility model are: (1) By setting an adjustable shim, the size of the coating cavity can be adjusted without disassembling the left and right die heads and without affecting the stability of the formed coating cavity, effectively reducing the complexity of operation and improving the ease of use of the coating equipment with this coating extrusion structure.

[0013] (2) By replacing the electromagnet with the liquid injection unit, the adjustment of the gasket width can be made without the need for electricity, thereby effectively reducing the cost of adjusting the size of the coating cavity during equipment production. Attached Figure Description

[0014] Figure 1 This is an exploded view of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a cross-sectional schematic diagram of the gasket of this utility model; Figure 5 This is a schematic diagram of the long bolt of this utility model; Figure 6 This is a schematic diagram of the upper half of the gasket of this utility model.

[0015] Explanation of the labels in the diagram: 1. Left mold head, 2. Right mold head, 201. Threaded hole, 3. Gasket, 31. Fixed pad, 32. Transition layer, 33. Moving pad, 301. Elastic tube, 302. L-shaped liquid guide hole, 303. Guide rod, 401. Feed chamber, 402. Coating chamber, 5. Long bolt, 51. Threaded section, 52. Smooth section, 6. Liquid injection unit, 61. Liquid guide tube, 62. Liquid injection tube, 63. Sealing plug. Detailed Implementation

[0016] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0017] First implementation method: Figures 1-3 This invention discloses a slit extrusion structure for applying a three-armed star-shaped multi-segment matte coating, comprising a left die 1 and a right die 2, which are connected by multiple long bolts 5. The upper surface of the left die 1 is in contact with the inner top of the right die 2. A gasket 3 is held between the left die 1 and the right die 2, and multiple elastic tubes 301 corresponding to the multiple long bolts 5 are fixedly embedded in the gasket 3. Multiple threaded holes 201 corresponding to the multiple elastic tubes 301 are drilled on the right die 2. The multiple long bolts 5 movably pass through the multiple elastic tubes 301 and are connected to the threaded holes. The 201 threaded connection consists of a left die head 1, a right die head 2, and a gasket 3 forming a coating cavity 402. The right die head 2 has a feed cavity 401 inside, and the end of the feed cavity 401 is connected to the coating cavity 402. The widths of the feed cavity 401 and the coating cavity 402 gradually decrease. The lower opening of the feed cavity 401 is located below the gasket 3, and the bottom of the gasket 3 is flush with the upper edge of the bottom of the feed cavity 401. This gradually narrows the flow path of the coating liquid, minimizing the impact of vibrations generated during upper feeding on the discharge from the bottom of the coating cavity 402, thus effectively ensuring uniform coating.

[0018] like Figure 5 The long bolt 5 includes a threaded section 51 and a smooth section 52 located in the middle of the threaded section 51. The smooth section 52 corresponds to the elastic tube 301. Due to the setting of the smooth section 52, the threaded section 51 is divided into two parts. One part is threadedly connected to the threaded hole 201, and the other part is threadedly connected to the left die head 1. This fixes the relative position between the left die head 1 and the right die head 2. During use, the two are not easy to loosen, which effectively ensures the stability of the size of the coating cavity 402. Moreover, the length of the smooth section 52 is 2-5 times the width of the gasket 3. When adjusting the size of the coating cavity 402 and turning the long bolt 5, the movement range of the long bolt 5 is small. This allows the smooth section 52 to always penetrate the elastic tube 301. Under the action of the smooth surface structure, it is not easy to have large friction with the elastic tube 301, which effectively protects the gasket 3 from wear.

[0019] like Figure 4The gasket 3 includes a fixed gasket layer 31 fixedly connected to the right die head 2, a movable gasket layer 33 abutting against the left die head 1, and a transition layer 32 fixedly connected between the fixed gasket layer 31 and the movable gasket layer 33. The fixed gasket layer 31 and the movable gasket layer 33 are both rigid structures, while the transition layer 32 is an elastic structure. Guide rods 303 are fixedly connected to the four corners of the end face of the movable gasket layer 33 near the fixed gasket layer 31. The ends of the guide rods 303 are movably inserted into the fixed gasket layer 31. The guide rods 303 are used to limit The movement of the moving pad 33 is not prone to deviation. The moving pad 33 is made of ferromagnetic material, and an electromagnet is embedded inside the left mold head 1. When the electromagnet is energized, it generates a magnetic attraction force on the moving pad 33. During coating, the magnetic attraction force can control the pad 3 to keep it consistent with the size of the coating cavity 402, so that the coating liquid flowing from the feed cavity 401 into the coating cavity 402 is not prone to spread upwards in the coating cavity 402, effectively avoiding problems with the uniformity of the coating due to its spread.

[0020] It is worth noting that when not in operation, the electromagnet can be de-energized to prevent the transition layer 32 from being subjected to continuous tensile force, thus protecting it from excessive aging.

[0021] When it is necessary to adjust the size of the coating cavity 402, the long bolt 5 can be turned in the reverse direction first to increase the distance between the left die head 1 and the right die head 2 to a size greater than the target size. Then, the electromagnet is energized to attract the moving pad layer 33, and the elastic transition layer 32 is extended until the moving pad layer 33 is tightly attached to the surface of the left die head 1. At this time, the long bolt 5 is turned in the forward direction to gradually reduce the distance between the left die head 1 and the right die head 2 until the coating cavity 402 reaches the target size. This allows for adjustment of the size of the coating cavity 402 without disassembling the left die head 1 and the right die head 2, effectively reducing the complexity of adjusting the size of the coating cavity 402 and improving ease of use. Compared with the prior art, this solution, through the setting of the adjustable width shim 3, allows for adjustment of the size of the coating cavity 402 without disassembling the left die head 1 and the right die head 2, and without affecting the stability of the formed coating cavity, effectively improving the ease of use of the coating equipment using this coating extrusion structure.

[0022] Second implementation method: This embodiment differs from the first embodiment in that it modifies some details of the gasket 3 and removes the electromagnet, while the rest remains the same as the first embodiment.

[0023] Figure 6As shown, the transition layer 32 is a hollow structure, and an L-shaped liquid guiding hole 302 is drilled at the upper end of the fixed pad layer 31. The liquid injection unit 6 is also fixedly connected to the upper end of the fixed pad layer 31. The L-shaped liquid guiding hole 302 is interconnected with the liquid injection unit 6, and the interior of the transition layer 32 is filled with limiting liquid through the liquid injection unit 6. The liquid injection unit 6 includes a liquid guiding pipe 61 fixedly connected to the upper end of the pad 3, a liquid injection pipe 62 fixedly connected to the upper end of the right mold head 2, and a sealing plug 63 covering the top of the liquid injection pipe 62. The liquid guiding pipe 61 is fixedly inserted through the upper end of the right mold head 2 and is flush with the upper surface of the right mold head 2.

[0024] It is worth noting that the limiting liquid can be a common and readily available liquid, such as water. When it is necessary to adjust the width of the coating cavity 402, if the size needs to be increased, multiple long bolts 5 can be turned in the reverse direction first to make the width of the coating cavity 402 greater than the target size. Then, the limiting liquid is injected into the transition layer 32 along the injection unit 6 to make the width of the gasket 3 greater than the target width. Then, multiple long bolts 5 are turned in the forward direction to make the left die head 1 gradually approach the right die head 2 and squeeze the gasket 3. Some of the limiting liquid flows back into the external container along the opening of the injection pipe 62. When the width of the coating cavity 402 is slightly greater than the target size, the sealing plug 63 is used to seal the injection pipe 62. The opening is tightened to prevent the limiting liquid in the gasket 3 from overflowing, thus maintaining the gasket 3 in a relatively stable state. Then, multiple long bolts 5 are tightened to allow the left die head 1 to continue to squeeze the gasket 3, causing the transition layer 32 to expand radially outward until the width of the coating cavity 402 reaches the target size. This completes the adjustment of the size of the coating cavity 402 without disassembling the left die head 1 and the right die head 2. Compared with the first embodiment, the entire process does not require the participation of electricity, saving the work of power wiring during equipment assembly and also saving the power consumption each time the size is adjusted, thereby effectively reducing the cost of using this special gasket 3.

[0025] When it is necessary to reduce the size of the coating chamber 402, simply unscrew the sealing plug 63 to expose the opening of the injection tube 62, and then tighten the long bolt 5 according to the above steps.

[0026] It is worth noting that when not in operation, some of the limiting fluid can be released, making the transition layer 32 less susceptible to continuous deformation forces and protecting it from excessive aging.

[0027] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A slit extrusion structure for applying a three-armed star-shaped multi-segment matte coating, comprising a left die (1) and a right die (2), wherein the left die (1) and the right die (2) are connected by a plurality of long bolts (5), and the upper surface of the left die (1) is in contact with the inner top of the right die (2), characterized in that: A gasket (3) is held between the left die head (1) and the right die head (2). A plurality of elastic tubes (301) corresponding to a plurality of long bolts (5) are fixedly embedded in the gasket (3). A plurality of threaded holes (201) corresponding to a plurality of elastic tubes (301) are drilled on the right die head (2). A plurality of long bolts (5) respectively movably pass through a plurality of elastic tubes (301) and are threadedly connected to the threaded holes (201). The left die head (1), the right die head (2) and the gasket (3) form a coating cavity (402). A feeding cavity (401) is drilled inside the right die head (2). The end of the feeding cavity (401) is connected to the coating cavity (402). The gasket (3) includes a fixed gasket layer (31) fixedly connected to the right mold head (2), a movable gasket layer (33) abutting against the left mold head (1), and a transition layer (32) fixedly connected between the fixed gasket layer (31) and the movable gasket layer (33). The fixed gasket layer (31) and the movable gasket layer (33) are both rigid structures, and the transition layer (32) is an elastic structure. The four corners of the end face of the movable gasket layer (33) near the fixed gasket layer (31) are fixedly connected with guide rods (303), and the ends of the guide rods (303) are movably inserted into the fixed gasket layer (31).

2. The slit extrusion structure for applying a three-armed star-shaped multi-block matte coating according to claim 1, characterized in that: The widths of the feeding chamber (401) and coating chamber (402) gradually decrease. The lower opening of the feeding chamber (401) is located below the gasket (3), and the bottom of the gasket (3) is flush with the upper edge of the bottom of the feeding chamber (401).

3. The slit extrusion structure for applying a three-armed star-shaped multi-block matte coating according to claim 1, characterized in that: The long bolt (5) includes a threaded section (51) and a smooth section (52) located in the middle of the threaded section (51). The smooth section (52) corresponds to the elastic tube (301), and the length of the smooth section (52) is 2-5 times the width of the gasket (3).

4. A three-arm star multiblock sub-light coating slot-extrusion structure for coating according to claim 1, characterized in that: The moving pad layer (33) is made of ferromagnetic material, and an electromagnet is embedded inside the left mold head (1). When the electromagnet is energized, it generates a magnetic attraction force on the moving pad layer (33).

5. The slit extrusion structure for applying a three-armed star-shaped multi-block matte coating according to claim 1, characterized in that: The transition layer (32) is a hollow structure. An L-shaped liquid guiding hole (302) is drilled at the upper end of the fixed pad layer (31). An injection unit (6) is also fixedly connected to the upper end of the fixed pad layer (31). The L-shaped liquid guiding hole (302) is connected to the injection unit (6). The transition layer (32) is filled with a limiting liquid through the injection unit (6).

6. The slit extrusion structure for applying a three-armed star-shaped multi-block matte coating according to claim 5, characterized in that: The liquid injection unit (6) includes a liquid guide tube (61) fixedly connected to the upper end of the gasket (3), a liquid injection tube (62) fixedly connected to the upper end of the right mold head (2), and a sealing plug (63) covering the top of the liquid injection tube (62). The liquid guide tube (61) is fixedly connected through the upper end of the right mold head (2) and is flush with the upper surface of the right mold head (2).

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