Slit type comma die head for coating device

Abstract

The invention discloses a slit type comma die head for a coating device, the slit type comma die head comprises a die head main body and a die head cover body, the die head cover body covers the die head main body, two ends of the die head main body are respectively provided with a first opening and closing device, two ends of the die head cover body are respectively provided with a second opening and closing device, and the first opening and closing device and the second opening and closing device are connected with the die head cover body. The first opening and closing device and the second opening and closing device are connected in a hinged mode, a slit channel is formed in the inner surface of the die head body in a concave mode, a coating outlet is formed in the front side of the slit channel in a concave mode, a coating protruding strip is arranged on the front side of the die head cover body in a protruding mode, and the coating protruding strip is correspondingly arranged on the coating outlet. Convenient opening and rapid maintenance of the die head are achieved, the operation efficiency and cleaning convenience are effectively improved, an internal slit channel structure is matched with an accurately-arranged inflow opening, uniform leading-in and stable laminar flow output of coating liquid can be achieved, the coating consistency is remarkably improved, and the coating quality is improved. The coating convex strip structure arranged at the front end can effectively guide the fluid direction, prevent splashing and cooperate with the comma roller to achieve fine blade coating.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coating device die, and particularly relates to a slit comma die for a coating device. BACKGROUND

[0002] In a high-precision coating process, the die is an important component for realizing quantitative delivery and uniform distribution of the coating liquid, and the structural design and fluid control performance of the die have a direct impact on the quality of the coating. In existing coating devices, a slit die structure is often used to realize stable laminar flow output of the liquid, and a comma doctor blade is used to realize film thickness control. However, the traditional slit die structure is often designed as a whole, and the die cover and the die body are connected by bolt fastening. When the gap between the die lip is maintained, cleaned or adjusted, the cover needs to be completely disassembled. This not only is tedious and time-consuming, but also has the problem of reduced sealing performance due to bolt wear or assembly deviation, which reduces the reliability and production efficiency of the equipment.

[0003] Some die structures lack scientific guidance in the design of the coating liquid inflow channel, resulting in uneven flow field distribution and unstable pressure of the liquid in the slit channel, which easily causes flow line disturbance, affects the consistency of the coating layer thickness and the edge forming effect. Moreover, the die lip port structure is not equipped with effective fluid guiding elements, which easily causes liquid splashing, flow deviation or glue hanging phenomenon, which is not conducive to the stable cooperation of the subsequent comma doctor blade, and reduces the overall doctor blade precision.

[0004] Therefore, it is urgent to overcome the defects of the prior art. SUMMARY

[0005] In view of the technical problems mentioned in the background art, the purpose of the present application is to provide a slit comma die for a coating device to solve the technical problems mentioned in the background art.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the present application is as follows: a slit comma die for a coating device, comprising a die body and a die cover, the die cover is installed on the die body, the two ends of the die body are respectively provided with a first opening and closing device, the two ends of the die cover are respectively provided with a second opening and closing device, the first opening and closing device and the second opening and closing device are hingedly connected, the inner surface of the die body is recessed with a slit channel, the front side of the slit channel is recessed with a coating outlet, the front side of the die cover is protruded with a coating protrusion, and the coating protrusion is correspondingly arranged on the coating outlet.

[0007] Furthermore, mounting bosses are symmetrically provided at both ends of the die body, and a first opening and closing mounting portion is provided at one end of the mounting boss facing the die body. A first opening and closing connection portion is provided at one end of the first opener and closer, and the first opening and closing connection portion is provided on the first opening and closing mounting portion. A first mounting through-hole is provided on the surface of the first opening and closing connection portion, and a first mounting through-groove is recessed on the surface of the first opening and closing mounting portion. The first mounting through-hole corresponds to the first mounting through-groove, and the first connecting component is passed through the first mounting through-hole and is connected and fixed to the first mounting through-groove.

[0008] Furthermore, second opening and closing mounting parts are symmetrically provided at both ends of the die head cover body, a second opening and closing connecting part is provided at one end of the second opener and closeer, the second opening and closing connecting part is arranged on the side of the second opening and closing mounting part, a second mounting through groove is recessed on the surface of the second opening and closing mounting part, a second mounting through hole is provided on the side of the second opening and closing connecting part, the second mounting through hole corresponds to the second mounting through groove, and a second connecting part is passed through the second mounting through hole and connected and fixed to the second mounting through groove.

[0009] Furthermore, the other end of the first opener is provided with a first hinged connection part, and the other end of the second opener is provided with a second hinged connection part. The first hinged connection part and the second hinged connection part are arranged correspondingly. The side of the first hinged connection part is provided with a first hinged through-hole, and the side of the second hinged through-hole is provided with a second hinged through-hole. The fastener passes through the first hinged through-hole and is hingedly connected to the second hinged through-hole.

[0010] Furthermore, the slit channel includes a first liquid channel and a second liquid channel, and the plurality of inflow openings are correspondingly arranged on the first liquid channel.

[0011] Furthermore, the rear side of the die head body is provided with an adjustment block connecting part, and a plurality of adjustment block connecting grooves are evenly concave on the surface of the adjustment block connecting part. An adjustment cross block is installed on the adjustment block connecting part, and a plurality of adjustment block connecting holes are evenly opened on the surface of the adjustment cross block. The plurality of adjustment block connecting holes correspond to the plurality of adjustment block connecting grooves one by one, and fasteners are passed through the adjustment block connecting holes and are matched with the adjustment block connecting grooves.

[0012] Furthermore, handle slots are symmetrically provided on both sides of the surface of the adjusting horizontal block, and the adjusting block handles are respectively connected to the handle slots.

[0013] Furthermore, a plurality of handle through-holes are evenly formed on the surface of the die head cover body, and the die cover handles are connected to the handle through-holes.

[0014] Further, the first connecting component and the second connecting component are connected with an open-close chain, the end of the first connecting component is provided with a first connecting through part, the end of the second connecting component is provided with a second connecting through part, one end of the open-close chain is provided with a first chain connecting part, the other end of the open-close chain is provided with a second chain connecting part, the first chain connecting part is connected with the first connecting through part through a fastener, and the second chain connecting part is connected with the second connecting through part through a fastener.

[0015] Further, the outer sides of the two mounting convex columns are sleeved with copper sleeves.

[0016] The present application mainly has the following beneficial effects: the die head cover is installed on the die head body, the left and right ends of the die head body are respectively provided with first openers, the left and right ends of the die head cover are respectively provided with second openers, the first openers and the second openers are connected in a hinged connection mode, the inner surface of the die head body is recessed with a slit channel, the front side of the slit channel is recessed with a coating outlet, the front side of the die head cover is protruded with a coating protruding strip, the coating protruding strip is correspondingly arranged on the coating outlet, the surface of the die head cover is uniformly provided with a plurality of inflow openings, and the plurality of inflow openings are correspondingly arranged between the slit channel. The slit comma die head for coating device of the present application is provided with a hinged opening and closing structure between the die head body and the die head cover, which realizes convenient opening and rapid maintenance of the die head, effectively improves the operation efficiency and cleaning convenience, the internal slit channel structure cooperates with the accurately arranged inflow openings, which can realize uniform introduction and stable laminar output of the coating liquid, significantly improves the coating consistency, the front end setting of the coating protruding strip structure can effectively guide the fluid direction, prevent splashing, and cooperate with the comma roller to realize fine scraping, and has high-precision feeding and high-efficiency shaping, which adapts to the process requirements of various viscosity coating materials, and the overall structure has high performance, high adaptability and easy maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a closed state structure schematic view of the die head body and the die head cover of the present application.

[0018] Figure 2 It is an open state structure schematic view of the die head body and the die head cover of the present application.

[0019] Figure 3 It is an exploded structure schematic view of the die head body, the first opener, the second opener, the die head cover of the present application.

[0020] Figure 4 It is an exploded structure schematic view of the die head body, the die head cover, the first opener, the second opener, the open-close chain of the present application.

[0021] Figure 5 It is a connecting structure schematic view of the adjusting block, the adjusting cross block and the adjusting block handle of the present application.

[0022] Figure 6 This is a schematic diagram of the exploded structure of the adjustment block connection part, the adjustment cross block, and the adjustment block handle of the present invention.

[0023] Figure 7 This is a schematic diagram of the exploded structure of the mold cover handle and the mold head cover body of the present invention.

[0024] Reference numerals: die body 10; die cover 20; first opener and closeer 11; second opener and closeer 21; slit channel 12; coating outlet 121; coating ridge 22; inflow opening 23; mounting boss 13; first opening and closing mounting portion 131; first opening and closing connecting portion 111; first mounting through-hole 112; first mounting through-groove 132; first connecting member 14; second opening and closing mounting portion 24; second opening and closing connecting portion 211; second mounting through-groove 241; second mounting through-hole 212; first hinged connecting portion 11 3; second hinged connection 213; first hinged through-hole 114; second hinged through-hole 214; first liquid channel 122; second liquid channel 123; adjustment block connection 15; adjustment block connection slot 151; adjustment cross block 16; adjustment block connection hole 161; handle slot 162; adjustment block handle 17; handle through-hole 25; mold cover handle 26; second connecting component 27; opening and closing chain 30; first connecting through-hole 141; second connecting through-hole 271; first chain connection 31; second chain connection 32; copper sleeve 18. DETAILED DESCRIPTION

[0025] like Figure 1 、 2The utility model discloses a slit comma die for coating device, which comprises a die body 10 and a die cover 20, the die cover 20 is installed on the die body 10, and reliable connection and convenient disassembly are realized through the opening and closing structure. The left and right ends of the die body 10 are respectively provided with first openers 11, and the left and right ends of the die cover 20 are respectively provided with second openers 21. The first openers 11 and the second openers 21 are connected in a hinged connection mode, which facilitates opening and closing maintenance without completely disassembling the die cover 20, and improves the operability and cleaning efficiency of the die. The inner surface of the die body 10 is recessed with a slit channel 12, which provides a stable and uniform laminar flow channel for the feed liquid. The front side of the slit channel 12 is recessed with a coating outlet 121 for outputting the die material liquid after pressure stabilization to the comma coating position. The front side of the die cover 20 is protruded with a coating protrusion 22, which is correspondingly arranged on the coating outlet 121. The structure is designed to form local guidance and limitation for the die lip edge, so as to realize a more stable, concentrated and accurate liquid output path. The coating protrusion 22 can also guide the direction of the liquid and prevent splashing in actual operation. To realize efficient inflow of the die material liquid into the slit channel 12, the surface of the die cover 20 is uniformly provided with a plurality of inflow openings 23, which are correspondingly arranged between the slit channel 12, so as to facilitate uniform inflow of the die material into the interior and form a uniform flow field, further improving the uniformity of the glue output and the stability of the slit port pressure. During use, the die material liquid is introduced into the slit channel 12 of the die body 10 through the inflow openings 23 on the surface of the die cover 20, forms a laminar flow in the channel, stably flows out through the coating outlet 121, and maintains the direction and shape under the action of the coating protrusion 22. Then, the comma roller further performs scraping and shaping, and finally forms a high-quality coating. The structure effectively combines the precise feeding characteristics of the traditional slit die and the dynamic scraping characteristics of the comma die, and exhibits better adaptability and coating uniformity when dealing with different viscosity glues. The overall structure of the die is convenient to maintain, disassemble and clean, and is suitable for various precise coating application scenarios.

[0026] As Figure 1 , 2As shown in Figures 3 and 4, mounting bosses 13 are symmetrically provided on the left and right ends of the die body 10. A first opening and closing mounting portion 131 is provided on one end of the mounting boss 13 facing the die body 10. A first opening and closing connecting portion 111 is provided on one end of the first opening and closing device 11. The first opening and closing connecting portion 111 is provided on the first opening and closing mounting portion 131. A first mounting through-hole 112 is provided on the surface of the first opening and closing connecting portion 111. A first mounting groove 132 is provided on the surface of the first opening and closing mounting portion 131. The first mounting through-hole 112 corresponds to the first mounting groove 132. The first connecting member 14 passes through the first mounting through-hole 112 and the first mounting groove 132, achieving a secure connection and fixation, thereby stably mounting the first opening and closing device 11 on the mounting boss 13 of the die body 10. This opening and closing structure not only has good mechanical strength and durability, but also facilitates disassembly and maintenance in the future.

[0027] During specific implementation, the left and right ends of the die head cover 20 are symmetrically provided with second opening and closing mounting parts 24, and one end of the second opener and closer 21 is provided with a second opening and closing connecting part 211, and the second opening and closing connecting part 211 is arranged on the side of the second opening and closing mounting part 24. The surface of the second opening and closing mounting part 24 is recessed with a second mounting through-groove 241, and the side of the second opening and closing connecting part 211 is provided with a second mounting through-hole 212, and the second mounting through-hole 212 corresponds to the second mounting through-groove 241. By fasteners passing through the second mounting through-hole 212 and the second mounting through-groove 241, a firm connection and fixation can be achieved, so that the second opener and closer 21 is stably installed on the die head cover 20, with a simple structure and convenient and stable installation.

[0028] During specific implementation, the other end of the first opener 11 is provided with a first hinged connection portion 113, and the other end of the second opener 21 is provided with a second hinged connection portion 213. The first hinged connection portion 113 and the second hinged connection portion 213 are correspondingly arranged. A first hinged through-hole 114 is defined on the side of the first hinged connection portion 113, and a second hinged through-hole 214 is defined on the side of the second hinged connection portion 213. The first hinged through-hole 114 and the second hinged through-hole 214 correspond to each other. A fastener is passed through the first hinged through-hole 114 and is hingedly connected to the second hinged through-hole 214, thereby hingedly connecting the first opener 11 and the second opener 21, so that the two have a structural characteristic of relative rotation. During use, the operator can use the hinged structure to open the die cover 20 upward or close it downward around the fastener as the axis, thereby realizing rapid opening and closing of the die. This structure not only simplifies the assembly and disassembly process, but also effectively reduces component wear caused by frequent maintenance.

[0029] like Figure 2As shown, the slit channel 12 includes a first liquid channel 122 and a second liquid channel 123, which are symmetrically arranged relative to the central axis of the die body 10. Together, they form a diversion and rectification structure for the coating liquid within the die, helping to achieve uniform distribution and stable output of the coating liquid. Several inlet openings 23 are correspondingly arranged in the first liquid channel 122 to direct the coating liquid supplied from the outside into the die. Through the rational arrangement of the inlet openings 23, the first liquid channel 122 can obtain a continuous and uniform liquid supply, thereby improving the feed consistency of the entire slit die.

[0030] like Figure 5 、 6 As shown, the rear side of the die body 10 is provided with an adjustment block connection portion 15, which is used to install and adjust auxiliary positioning members or guide structures in the die structure. The surface of the adjustment block connection portion 15 is evenly concave with a plurality of adjustment block connection grooves 151, which are used to provide a multi-point positioning structure. An adjustment cross block 16 is mounted on the adjustment block connection portion 15, and the surface of the adjustment cross block 16 is evenly opened with a plurality of adjustment block connection holes 161. The plurality of adjustment block connection holes 161 correspond one-to-one with the plurality of adjustment block connection grooves 151. During the actual installation process, fasteners are passed through the adjustment block connection holes 161 on the adjustment cross block 16 and aligned with the adjustment block connection grooves 151 on the adjustment block connection portion 15. The adjustment cross block 16 is firmly connected and fixed to the adjustment block connection portion 15 by a locking method, thereby providing the adjustment cross block 16 with good stability and adjustability. During use, the operator can fine-tune the position of the adjustment block 16 based on the actual coating process requirements to provide auxiliary support for key parts of the die structure, position correction, or angle fine-tuning. Adjustment of this adjustment block not only effectively compensates for structural deviations caused by thermal expansion and contraction or long-term operation, but also flexibly adjusts the die lip opening and scraper contact state according to the viscosity, flow rate, and film thickness requirements of different coating liquids, thereby improving the overall operational adaptability and precision stability of the die.

[0031] In practice, handle slots 162 are symmetrically recessed on the surface of the adjustment block 16. Each handle slot 162 is connected to an adjustment block handle 17, enabling convenient manual operation and positioning of the adjustment block 16. During use, the operator can manually grasp the left and right adjustment block handles 17 to fine-tune the installation position of the adjustment block 16 on the adjustment block connection portion 15. This handle structure not only facilitates rapid movement or repositioning of the adjustment block during installation, adjustment, or maintenance, but also reduces tool dependency, improving operational efficiency and user-friendliness during equipment commissioning and line changes.

[0032] like Figure 7As shown, the die cover 20 is evenly distributed with a plurality of handle holes 25. These handle holes 25 are connected to a die cover handle 26 to assist in opening, closing, and transporting the die cover 20. During use, the operator can manually grasp the die cover handle 26 to conveniently remove, install, or adjust the die cover 20. The provision of the die cover handle 26 significantly improves operator convenience and safety, particularly during routine equipment maintenance, replacing internal components, cleaning residual coating fluid, or switching between different formulations, preventing injuries or misoperation caused by direct contact with the die edge.

[0033] like Figure 4 As shown, the two ends of the die cover 20 are respectively connected to a second connecting component 27, and an opening and closing chain 30 is connected between the first connecting component 14 and the second connecting component 27. The opening and closing chain 30 is used to form a movable connection structure between the die body 10 and the die cover 20 to realize the opening, closing, flipping or limiting functions of the die structure. The end of the first connecting component 14 is provided with a first connecting through portion 141, and the end of the second connecting component 27 is provided with a second connecting through portion 271. One end of the opening and closing chain 30 is provided with a first chain connecting portion 31 adapted to the first connecting through portion 141, and the other end of the opening and closing chain 30 is provided with a second chain connecting portion 32 adapted to the second connecting through portion 271. During installation, the first chain connection portion 31 is connected to the first connecting through portion 141 via fasteners, and the second chain connection portion 32 is connected to the second connecting through portion 271 via fasteners, thereby achieving a reliable mechanical connection between the two ends of the opening and closing chain 30 and the first connecting member 14 and the second connecting member 27. During use, the opening and closing chain 30 provides active guidance and limited support during the opening or closing of the die structure. This not only prevents the die cover 20 from falling due to excessive opening angles, but also assists in aligning the die cover 20 during closing, improving opening and closing efficiency and structural stability. Furthermore, the chain connection structure offers flexible cushioning, easy installation, and low cost, helping to enhance the safety and user experience of the die device during daily operation, maintenance, and replacement.

[0034] like Figure 2 As shown, the outer sides of the two mounting bosses 13 are sleeved with copper sleeves 18 to enhance the structural strength and wear resistance of the mounting bosses.

[0035] In summary, the die cover 20 is mounted on the die main body 10, and the left and right ends of the die main body 10 are respectively installed with a first opener 11, and the left and right ends of the die cover 20 are respectively installed with a second opener 21. The first opener 11 and the second opener 21 are hingedly connected. The inner surface of the die main body 10 is concavely provided with a slit channel 12, and the front side of the slit channel 12 is concavely provided with a coating outlet 121. The front side of the die cover 20 is convexly provided with a coating ridge 22, and the coating ridge 22 is correspondingly arranged on the coating outlet 121. The surface of the die cover 20 is evenly provided with a plurality of inflow openings 23, and a plurality of the inflow openings 23 are connected to the slit channel. The slit-type comma die for the coating device of the present invention is arranged correspondingly between the die body and the die cover, so that the die can be easily opened and maintained, and the operating efficiency and cleaning convenience are effectively improved. The internal slit channel structure cooperates with the precisely arranged inflow opening to achieve uniform introduction and stable laminar output of the coating liquid, and significantly improves the consistency of the coating. The coating rib structure arranged at the front end can effectively guide the direction of the fluid and prevent splashing, and cooperates with the comma roller to achieve fine scraping, taking into account high-precision feeding and high-efficiency shaping, and adapting to the process requirements of various viscosity coating materials. The overall structure has high performance, high adaptability and easy maintenance.

Claims

1. A slit-type comma die head for a coating device, characterized in that: The die cover (20) is mounted on the die body (10), and first openers (11) are respectively mounted on both ends of the die body (10), and second openers (21) are respectively mounted on both ends of the die cover (20), and the first opener (11) and the second opener (21) are hingedly connected, and a slit channel (12) is concavely provided on the inner surface of the die body (10), and a coating outlet (121) is concavely provided on the front side of the slit channel (12), and a coating ridge (22) is convexly provided on the front side of the die cover (20), and the coating ridge (22) is correspondingly arranged on the coating outlet (121).

2. The slit-type comma die for coating device according to claim 1, characterized in that: The die body (10) is symmetrically provided with mounting bosses (13) at both ends, and a first opening and closing mounting portion (131) is provided on one end of the mounting boss (13) facing the die body (10). A first opening and closing connecting portion (111) is provided on one end of the first opening and closing device (11), and the first opening and closing connecting portion (111) is provided on the first opening and closing mounting portion (131). A first mounting through-hole (112) is provided on the surface of the first opening and closing connecting portion (111), and a first mounting through-groove (132) is provided on the surface of the first opening and closing mounting portion (131). The first mounting through-hole (112) corresponds to the first mounting through-groove (132), and the first connecting component (14) passes through the first mounting through-hole (112) and is connected and fixed to the first mounting through-groove (132).

3. The slit-type comma die for coating device according to claim 2, characterized in that: The die head cover (20) is symmetrically provided with a second opening and closing mounting portion (24) at both ends, and a second opening and closing connecting portion (211) is provided at one end of the second opening and closing device (21). The second opening and closing connecting portion (211) is arranged on the side of the second opening and closing mounting portion (24). A second mounting through-groove (241) is recessed on the surface of the second opening and closing mounting portion (24). A second mounting through-hole (212) is provided on the side of the second opening and closing connecting portion (211). The second mounting through-hole (212) corresponds to the second mounting through-groove (241), and is connected and fixed to the second mounting through-groove (241) via a second connecting component (27) passing through the second mounting through-hole (212).

4. The slit-type comma die for a coating device according to claim 3, characterized in that: The other end of the first opener (11) is provided with a first hinged connection part (113), and the other end of the second opener (21) is provided with a second hinged connection part (213). The first hinged connection part (113) and the second hinged connection part (213) are arranged correspondingly. A first hinged through-hole (114) is provided on the side of the first hinged connection part (113), and a second hinged through-hole (214) is provided on the side of the second hinged connection part (213). A fastener passes through the first hinged through-hole (114) and is hingedly connected to the second hinged through-hole (214).

5. The slit-type comma die for a coating device according to claim 1, characterized in that: The slit channel (12) comprises a first liquid channel (122) and a second liquid channel (123), and a plurality of the inflow openings (23) are correspondingly arranged on the first liquid channel (122).

6. The slit-type comma die for a coating device according to claim 1, characterized in that: The rear side of the die head body (10) is provided with a block connection portion (15), and a plurality of block connection grooves (151) are evenly concavely provided on the surface of the block connection portion (15). An adjusting transverse block (16) is mounted on the block connection portion (15), and a plurality of block connection holes (161) are evenly opened on the surface of the adjusting transverse block (16). The plurality of block connection holes (161) correspond to the plurality of block connection grooves (151) in a one-to-one manner, and fasteners pass through the block connection holes (161) and are matched with the block connection grooves (151).

7. The slit-type comma die for a coating device according to claim 6, characterized in that: Handle slots (162) are symmetrically recessed on both sides of the surface of the adjusting horizontal block (16), and the adjusting block handles (17) are respectively connected to the handle slots (162).

8. The slit-type comma die for a coating device according to claim 1, characterized in that: A plurality of handle through-holes (25) are evenly formed on the surface of the die head cover body (20), and a die cover handle (26) is connected to the handle through-holes (25).

9. The slit-type comma die for a coating device according to claim 4, characterized in that: An opening and closing chain (30) is connected between the first connecting component (14) and the second connecting component (27); a first connecting through portion (141) is provided at an end of the first connecting component (14); a second connecting through portion (271) is provided at an end of the second connecting component (27); a first chain connecting portion (31) is provided at one end of the opening and closing chain (30); and a second chain connecting portion (32) is provided at the other end of the opening and closing chain (30); the first chain connecting portion (31) is connected to the first connecting through portion (141) via a fastener, and the second chain connecting portion (32) is connected to the second connecting through portion (271) via a fastener.

10. The slit-type comma die for a coating device according to claim 2, characterized in that: The outer sides of the two mounting bosses (13) are both sleeved with copper sleeves (18).

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