Two-side confluence type self-bubble-discharging die head
With its two-sided confluence self-draining die head design, the coating slowly flows into the narrow channel under the action of gravity and surface tension, solving the problem of difficult bubble removal in traditional coating dies, improving coating efficiency and reducing coating waste.
Patent Information
- Application Number
- CN202520181214.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Traditional coating dies cannot expel air bubbles on their own, requiring additional venting pipes. This process is time-consuming and incomplete, leading to decreased coating efficiency and increased paint consumption.
The design adopts a two-sided confluence self-draining mold head. Through the ingenious drainage design of the first side feeding channel, the second side feeding channel, the first drainage groove, the second drainage groove, the flat liquid storage layer and the slit channel, the coating slowly flows into the slit channel under the action of gravity and surface tension, avoiding gas residue and eliminating the need for additional exhaust pipes and defoaming processes.
It eliminates the need for additional exhaust piping, improves coating efficiency, reduces paint waste, and simplifies the production process.
Smart Images
Figure CN223862176U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of coating, in particular to a two-side converging self-bubble-removing die. BACKGROUND
[0002] The coating die is one of the core components in the coating machine equipment, which is mainly used for uniformly coating various coatings on different types of substrates, including but not limited to slurry, glue, ink, etc. The application fields of the coating die include but are not limited to printing equipment, such as offset printing machine, intaglio printing machine, screen printing machine, etc.
[0003] The conventional coating die can be generally divided into T-shaped die as shown in Figure 1 , Figure 2 and Figure 3 , and coat hanger type die as shown in Figure 4 , Figure 5 and Figure 6 . Whether it is T-shaped die or coat hanger type die, the coating die 100 generally has a die body 110 and a die cavity 120 provided in the die body 110, and the die cavity 120 includes a liquid storage groove 121 and a feed passage 122, an exhaust passage 123 and a slit 124 which are respectively communicated with the liquid storage groove 121. The feed passage 122 is used for conveying the coating to the liquid storage groove 121; the liquid storage groove 121 conveys the coating to the slit 124 so that the coating flows out through the slit 124 with a certain thickness. The difference between the T-shaped die and the coat hanger type die lies in that the cross section of the liquid storage groove 121 of the T-shaped die is basically consistent; while the cross section of the liquid storage groove 121 of the coat hanger type die is smaller as the distance from the feed port is farther.
[0004] However, whether it is T-shaped die or coat hanger type die, when the feeding starts, as shown in Figure 7 and Figure 8 , or as shown in Figure 9 and Figure 10 , the coating 900 will quickly flow down under the action of gravity, so as to quickly spread on the bottom of the die cavity 120, and there is a high probability of bubbles in the middle. Therefore, the conventional coating die 100 cannot realize the bubble removal by itself, and needs to be additionally provided with an exhaust pipeline to realize the bubble removal, so that the coating 900 can fill the die cavity 120. Among them, the bubble removal is also called exhaust or bubble removal. The conventional coating die 100 needs to be exhausted before coating, and the exhaust process is the process of filling the die cavity 120 with the coating 900 and removing the air.
[0005] Moreover, the additional exhaust pipeline needs to use an exhaust pipe, a valve and a related control module, so that the production process is increased, and the complex structure leads to an increase in cost.
[0006] In addition, the traditional coating die head takes a long time to remove air bubbles, usually more than 5 minutes, and may leave air residue. This results in problems such as reduced coating efficiency and increased paint loss. Utility Model Content
[0007] Therefore, it is necessary to provide a two-sided confluence self-draining bubble mold head.
[0008] One embodiment of this application is a two-sided confluence self-draining bubble mold head, which includes two-sided confluence mold head bodies;
[0009] The dual-flow self-draining mold head has dual-flow mold head cavities in the dual-flow mold head body;
[0010] The two-sided confluence mold head cavity includes a first-side feeding channel, a second-side feeding channel, a first diversion groove, a second diversion groove, a flat liquid storage layer, and a slit channel;
[0011] In the direction of gravity, the two converging head bodies are recessed to form a groove. The first drainage groove and the second drainage groove are respectively located on both sides of the groove. The first drainage groove and the second drainage groove are respectively connected to the slit channel through the flat liquid storage layer. The flat liquid storage layer, the first drainage groove and the second drainage groove have the same top height.
[0012] The first side feed channel is connected to the top of the first diversion channel, and the second side feed channel is connected to the top of the second diversion channel;
[0013] In the horizontal direction, the thickness of the flat liquid storage layer is less than a preset thickness range, so that the coating, under the action of surface tension, has a state of contacting the inner wall of the flat liquid storage layer and flowing downward in the direction of gravity due to gravity.
[0014] The aforementioned two-sided confluence self-draining dies, through the cooperation of a first-side feeding channel, a second-side feeding channel, a first drainage groove, a second drainage groove, a flat liquid storage layer, and a slit channel, employs a clever drainage design. This allows the coating's own gravity and surface tension to reach a relative balance within the cavities of the two-sided drainage dies, thus allowing it to slowly flow into the slit channel along the wall of the flat liquid storage layer. Furthermore, during this slow flow into the slit channel, it also slowly flows down along the wall of the slit channel. The entire process avoids the possibility of residual gas inside the cavities of the two-sided drainage dies. Therefore, it fundamentally solves the problem of coating rapidly flowing down under gravity and quickly filling the slit channel at the bottom of the two-sided confluence self-draining dies. On the one hand, it eliminates the need for additional venting pipes; on the other hand, it eliminates the de-foaming process after feeding, thereby improving coating efficiency.
[0015] In some embodiments, the two-sided manifold head bodies and the two-sided manifold head cavities have overlapping symmetrical surfaces;
[0016] The groove itself is symmetrically arranged with respect to the symmetrical surface;
[0017] The flat liquid storage layer itself is symmetrically arranged with respect to the symmetrical surface;
[0018] The first drainage channel and the second drainage channel are symmetrically arranged with respect to the symmetrical surface.
[0019] In some embodiments, the groove has an arc shape.
[0020] In some embodiments, the groove has an obtuse angle shape.
[0021] In some embodiments, the two-sided confluence head body has a pair of beveled edges at the groove;
[0022] The first drainage channel and the second drainage channel are strip-shaped channels that fit into the inclined side.
[0023] In some embodiments, the bottom of the drainage channel is spaced apart from the bottom of the groove in the direction of gravity.
[0024] In some embodiments, the top of the flat liquid storage layer has a rounded corner shape.
[0025] In some embodiments, the surfaces of the first and second drainage channels adjacent to the flat liquid storage layer are all connected to the flat liquid storage layer.
[0026] In some embodiments, the flat liquid storage layer has a cuboid shape;
[0027] The slit channel is a cuboid with a cross-section of a right trapezoid or an isosceles trapezoid;
[0028] In the horizontal direction, the connection position between the flat liquid storage layer and the slit channel is set with the same width.
[0029] In some embodiments, the first side feed channel and the second side feed channel are openings or pipes. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of the structure of a traditional coating T-die.
[0032] Figure 2 for Figure 1 A schematic cross-sectional view along the A1-A1 direction of the embodiment shown.
[0033] Figure 3 for Figure 1 A schematic cross-sectional view along the A2-A2 direction of the embodiment shown.
[0034] Figure 4 This is a schematic diagram of the structure of a traditional coating hanger-type die head.
[0035] Figure 5 for Figure 4 A schematic cross-sectional view along the B1-B1 direction of the embodiment shown.
[0036] Figure 6 for Figure 4 A cross-sectional view along the B2-B2 direction of the embodiment shown.
[0037] Figure 7 for Figure 1 An internal schematic diagram of the usage state of the illustrated embodiment.
[0038] Figure 8 for Figure 7 A schematic cross-sectional view along the A3-A3 direction of the embodiment shown.
[0039] Figure 9 for Figure 4 An internal schematic diagram of the usage state of the illustrated embodiment.
[0040] Figure 10 for Figure 9 A cross-sectional view along the B3-B3 direction of the embodiment shown.
[0041] Figure 11 This is a schematic diagram of an embodiment of the two-sided drainage self-draining foam mold head described in this application.
[0042] Figure 12 for Figure 11 Another schematic diagram of the embodiment shown.
[0043] Figure 13 for Figure 12 Another schematic diagram of the embodiment shown.
[0044] Figure 14 for Figure 12 The illustrated embodiment is a schematic diagram of its internal structure in use.
[0045] Figure 15 forFigure 14 A cross-sectional view along the C1-C1 direction of the embodiment shown.
[0046] Figure 16 for Figure 15 A cross-sectional view along the C2-C2 direction of the embodiment shown.
[0047] Reference numerals: Coating die head 100, Die head body 110, Die head cavity 120, Liquid storage tank 121, Feed channel 122, Exhaust channel 123, Slit 124, Two-sided confluence self-draining die head 200, Two-sided confluence die head body 210, Groove 211, Top position 212, Bevel 213, Two-sided confluence die head cavity 220, First side feed channel 221, Second side feed channel 222, First drainage groove 223, Second drainage groove 224, Flat liquid storage layer 225, Slit channel 226, Coating 300, Gravity direction 400, Horizontal direction 500, Symmetry plane 600. Detailed Implementation
[0048] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0053] To address the issues of traditional coating dies failing to automatically expel air bubbles, requiring additional venting pipes, and the time-consuming and insufficient bubble removal process, the applicant has proposed solutions along two technical paths, with this application representing one of these paths. This application discloses a two-sided confluence self-draining bubble die, comprising some or all of the technical features of the following embodiments; that is, the two-sided confluence self-draining bubble die includes some or all of the following structures. In one embodiment of this application, a two-sided confluence self-draining mold head includes a two-sided confluence mold head body; the two-sided confluence self-draining mold head has two-sided confluence mold head cavities in the two-sided confluence mold head body; the two-sided confluence mold head cavities include a first side feeding channel, a second side feeding channel, a first diversion groove, a second diversion groove, a flat liquid storage layer, and a slit channel; in the direction of gravity, the two-sided confluence mold head body is recessed to form a groove, the first diversion groove and the second diversion groove are respectively located on both sides of the groove, the first diversion groove and the second diversion groove are respectively connected to the slit channel through the flat liquid storage layer, and the flat liquid storage layer, the first diversion groove and the second diversion groove have the same top position; the first side feeding channel is connected to the top position of the first diversion groove, and the second side feeding channel is connected to the top position of the second diversion groove; in the horizontal direction, the thickness of the flat liquid storage layer is less than a preset thickness range, so that the coating has a state of contacting the inner wall of the flat liquid storage layer under the action of surface tension and flowing downward in the direction of gravity due to gravity. The aforementioned two-sided confluence self-draining dies, through the coordination of a first-side feed channel, a second-side feed channel, a first drainage groove, a second drainage groove, a flat liquid storage layer, and a slit channel, employs a clever drainage design. This allows the coating's own gravity and surface tension to reach a relative balance within the cavities of the two-sided drainage dies, resulting in a slow flow along the wall of the flat liquid storage layer into the slit channel. Furthermore, during this slow flow, the coating also flows slowly down the wall of the slit channel. The entire process avoids the possibility of residual gas inside the cavities of the two-sided drainage dies. Therefore, it fundamentally solves the problem of coating rapidly flowing down under gravity and quickly filling the slit channels at the bottom of the two-sided self-draining dies. This eliminates the need for additional venting pipes and removes the post-feeding de-bubbling process, thereby improving coating efficiency. The following section will further elaborate on this design. Figures 1 to 16 The two-sided confluence self-draining bubble mold head is described in detail.
[0054] In some embodiments, a two-sided confluence self-draining foam die head 200 is as follows: Figure 11 As shown, it includes a two-sided confluence mold head body 210; the two-sided confluence self-draining mold head 200 has two-sided confluence mold head cavities 220 in the two-sided confluence mold head body 210; combined with Figure 12 and Figure 13The two-sided confluence mold cavity 220 includes a first-side feeding channel 221, a second-side feeding channel 222, a first diversion groove 223, a second diversion groove 224, a flat liquid storage layer 225, and a slit channel 226; combined with Figure 14 and Figure 15 In the gravity direction 400, the two converging die heads 210 are recessed to form a groove 211. The first drainage channel 223 and the second drainage channel 224 are respectively located on both sides of the groove 211. The first drainage channel 223 and the second drainage channel 224 are respectively connected to the slit channel 226 through the flat liquid storage layer 225, and the flat liquid storage layer 225, the first drainage channel 223 and the second drainage channel 224 have the same top position 212. The first side feeding channel 221 is connected to the top position 212 of the first drainage channel 223, and the second side feeding channel 222 is connected to the top position 212 of the second drainage channel 224. Figure 15 and Figure 16 In the horizontal direction 500, the thickness of the flat liquid storage layer 225 is less than a preset thickness range, so that the coating 300, under the action of surface tension, has a state of contacting the inner wall of the flat liquid storage layer 225 and flowing downward in the gravity direction 400 due to gravity. This structural design, through the cooperation of the first side feeding channel 221, the second side feeding channel 222, the first diversion groove 223, the second diversion groove 224, the flat liquid storage layer 225, and the slit channel 226, employs a clever diversion design. This allows the gravity of the coating 300 and its surface tension to reach a relative balance in the two diversion die head cavities 220, thus allowing it to slowly flow into the slit channel 226 along the wall of the flat liquid storage layer 225. During this slow flow into the slit channel 226, it also slowly flows down along the wall of the slit channel 226. The entire process avoids the possibility of residual gas inside the two diversion die head cavities 220. Therefore, it solves the problem of the coating 300 rapidly flowing down under gravity and quickly filling the slit channel 226 at the bottom of the two diversion self-draining die heads 200. On the one hand, there is no need to configure an additional venting pipe, and on the other hand, the defoaming process after feeding is eliminated, which is conducive to improving coating efficiency.
[0055] In each embodiment, such as Figure 13 and Figure 14As shown, the dual-side confluence self-draining mold head 200 has dual-side confluence mold head cavities 220 within the dual-side confluence mold head body 210; the dual-side confluence mold head cavity 220 includes a first-side feeding channel 221, a second-side feeding channel 222, a first drainage groove 223, a second drainage groove 224, a flat liquid storage layer 225, and a slit channel 226; that is, the first-side feeding channel 221, the second-side feeding channel 222, the first drainage groove 223, the second drainage groove 224, the flat liquid storage layer 225, and the slit channel 226 are a single unit, which are the dual-side confluence mold head cavities 220. A portion of 0, and the first side feed channel 221, the second side feed channel 222, the first diversion channel 223, the second diversion channel 224, the flat liquid storage layer 225, and the slit channel 226 are all interconnected, so that the coating 300, under the action of gravity, flows from the first side feed channel 221 through the first diversion channel 223 into the flat liquid storage layer 225, and from the second side feed channel 222 through the second diversion channel 224 into the flat liquid storage layer 225, then flows from the flat liquid storage layer 225 into the slit channel 226, and finally flows out from the slit channel 226. In various embodiments, the slit channel 226 may also be called a slit, to avoid contact with... Figures 1 to 10 The traditional designation of slit 124 is confused with the designation. Compared to the technical approach of setting only one drainage channel, this method uses the first side feeding channel 221 and the second side feeding channel 222 to achieve dual-port injection, and the first drainage channel 223 and the second drainage channel 224 to achieve dual-port drainage, which improves the glue injection efficiency of the two-sided drainage self-draining foam mold head 200 to a certain extent.
[0056] In some embodiments, the first side feed channel 221 and the second side feed channel 222 are openings, that is, the two side guide mold heads 210 have two openings, which serve as the first side feed channel 221 and the second side feed channel 222, respectively. Alternatively, in some embodiments, the first side feed channel 221 and the second side feed channel 222 are pipes, with the inner cavity of one pipe serving as the first side feed channel 221 and the inner cavity of the other pipe serving as the second side feed channel 222, so as to connect to the externally input paint 300.
[0057] In each embodiment, such as Figure 14 and Figure 15 As shown, in the gravity direction 400, the two confluence head bodies 210 are recessed to form a groove 211. The first drainage groove 223 and the second drainage groove 224 are respectively located on both sides of the groove 211. The first drainage groove 223 and the second drainage groove 224 are respectively connected to the slit channel 226 through the flat liquid storage layer 225.Figure 16 The flat liquid storage layer 225, the first drainage channel 223, and the second drainage channel 224 have a top position 212 of the same height; the first side feed channel 221 connects to the top position 212 of the first drainage channel 223, and the second side feed channel 222 connects to the top position 212 of the second drainage channel 224; as an example, when the paint 300 flows into the first drainage channel 223 through the first side feed channel 221, part of it flows directly from the top position of the first drainage channel 223 into the top position of one side of the flat liquid storage layer 225, and part of it flows through the first drainage channel 224. 3. The liquid flows downwards, flowing into the flat liquid storage layer 225 on one side, and the remaining part flows all the way to the bottom of the first diversion channel 223 and then into the flat liquid storage layer 225. Similarly, when the paint 300 flows into the second diversion channel 224 through the first side feed channel 221, part of it flows directly from the top of the second diversion channel 224 into the top of one side of the flat liquid storage layer 225, part of it flows downwards through the second diversion channel 224 and into the flat liquid storage layer 225 on the other side, and the remaining part flows all the way to the bottom of the second diversion channel 224 and then into the flat liquid storage layer 225.
[0058] In various embodiments, the thickness of the flat liquid storage layer 225 in the horizontal direction 500 is less than a preset thickness range, so that the coating 300, under the action of surface tension, has a state of contacting the inner wall of the flat liquid storage layer 225 and flowing downward in the gravity direction 400 due to gravity. In some embodiments, the preset thickness range is less than 3 mm to 10 mm. As examples, the preset thickness range is less than 3 mm, 5 mm, 7 mm, 8 mm, or 10 mm. It is understood that the preset thickness range is usually set or adjusted according to the properties of the coating 300 itself, for example, based on flowability indicators such as viscosity. During the production process, under the action of the coating 300's own gravity, the coating 300 flows downward along the wall of the flat liquid storage layer 225. Since the thickness design of the flat liquid storage layer 225 takes into account both the action of the coating 300's own gravity and its own surface tension, the coating 300 will not flow downward like... Figures 1 to 10Instead of flowing rapidly downwards as in traditional methods, the coating 300 flows slowly down the wall of the flat liquid storage layer 225, thus slowly flowing into the slit channel 226 along the drainage groove 223 and the wall of the flat liquid storage layer 225. During this slow flow into the slit channel 226, it also flows slowly down the wall of the slit channel 226. Therefore, in the process of injecting the coating 300 into the first side feed channel 221 and the second side feed channel 222 of the two-sided drainage self-draining mold head 200, the entire process avoids the possibility of residual gas inside the cavity 220 of the two-sided drainage mold head. This solves the problem from the source that the coating 300 flows down rapidly under gravity and quickly fills the slit channel 226 at the bottom of the two-sided drainage self-draining mold head 200. Moreover, compared to... Figures 1 to 10 Compared to traditional methods, this embodiment eliminates the need for additional venting pipes and removes the defoaming process after material feeding, thereby improving coating efficiency. Furthermore, by eliminating the defoaming process after material feeding, leakage of paint 300 from the slit channel 226 during the defoaming process is prevented, thus solving the problem of increased paint 300 consumption.
[0059] In some embodiments, the first drainage channel 223 is located downstream of the first side feed channel 221 and communicates with the first side feed channel 221; the second drainage channel 224 is located downstream of the second side feed channel 222 and communicates with the second side feed channel 222. As an example, the first drainage channel 223 communicates with the lower end of the first side feed channel 221, and the second drainage channel 224 communicates with the lower end of the second side feed channel 222. The function is to guide the paint 300 to flow towards both ends of the two side drainage mold cavity 220 while also flowing evenly towards the middle of the two side drainage mold cavity 220 when the paint 300 flows into the flat liquid storage layer 225, that is, to guide the paint 300 to flow evenly down the flat liquid storage layer 225. The flat liquid storage layer 225, also referred to simply as the liquid storage layer, is located downstream of the first drainage channel 223 and the second drainage channel 224, and is connected to the first drainage channel 223 and the second drainage channel 224. As an example, the flat liquid storage layer 225 is connected to the lower end of the first drainage channel 223 and the second drainage channel 224. In some embodiments, the surfaces of the first drainage channel 223 and the second drainage channel 224 adjacent to the flat liquid storage layer 225 are all connected to the flat liquid storage layer 225. That is, the flat liquid storage layer 225 is connected to the entire first drainage channel 223 and the entire second drainage channel 224, and is not limited to the upper, middle or lower end. Its function is to allow the coating 300 to form sufficient surface tension in the flat liquid storage layer 225, i.e., the interlayer, thereby weakening the influence of gravity, so that the gravity of the coating 300 itself and its surface tension are relatively balanced in the drainage mold cavity 220 on both sides. The slit channel 226 is located downstream of and communicates with the flat liquid storage layer 225, and its function is to allow the coating 300 to flow out uniformly with a certain thickness. This structural design overcomes the technical problem of traditional coating dies being unable to self-defoam. By adopting a sandwich structure design, the surface tension and viscosity of the coating 300 are used to balance the influence of gravity on the coating 300, thus achieving self-defoaming. This gives the two-sided drainage self-defoaming die 200 a self-defoaming function. On the other hand, the thin-body design results in a smaller cavity volume and faster defoaming, meaning that the two-sided drainage self-defoaming die 200 has higher defoaming efficiency and less coating 300 loss.
[0060] Exemplarily, the two side manifold cavity 220 has a symmetry plane 600, that is, relative to the symmetry plane 600, the two side manifold cavity 220 has two symmetrical parts. In some embodiments, such as Figure 12 and Figure 14As shown, the two-sided confluence mold head bodies 210 and the two-sided confluence mold head cavities 220 have overlapping symmetry planes 600; the groove 211 itself is symmetrically arranged with respect to the symmetry plane 600; the flat liquid storage layer 225 itself is symmetrically arranged with respect to the symmetry plane 600; the first drainage groove 223 and the second drainage groove 224 are symmetrically arranged with respect to the symmetry plane 600. In other embodiments, the two-sided confluence mold head cavities 220 can also be asymmetrical structures. In this case, some structural changes need to be made to ensure that the coating 300 flows in a consistent manner on both sides of the two-sided confluence mold head cavities 220, avoiding the formation of air bubbles.
[0061] In some of these embodiments, such as Figure 12 and Figure 14 As shown, the groove 211 has an obtuse angle shape. As an example, the groove 211 has an obtuse angle of 110 to 150 degrees. As an example, the groove 211 has an obtuse angle of 110, 120, 130, 140, or 150 degrees. (Combined) Figure 11 In some embodiments, the two confluence head bodies 210 have a pair of bevels 213 at the groove 211; the first drainage groove 223 and the second drainage groove 224 are strip-shaped grooves that fit against one of the bevels 213. Exemplarily, the included angle between the first drainage groove 223 and the second drainage groove 224, that is, the included angle between the extending directions of the first drainage groove 223 and the second drainage groove 224, has the same angle as the obtuse angle of the groove 211. In other embodiments, the groove 211 has an arc shape. It is understood that both the obtuse angle shape and the arc shape are symmetrical shapes. In other embodiments, the groove 211 may also have other shapes, such as asymmetrical shapes. As mentioned earlier, for the asymmetrical groove 211, it is necessary to average the structure of both sides of the two confluence mold cavity 220, that is, to average the two confluence mold cavity 220, so that the coating 300 maintains the same flow state on both sides of the two confluence mold cavity 220, and avoids the formation of air bubbles.
[0062] Exemplarily, in the extending direction, the strip groove has a rectangular cross-section, that is, the first drainage groove 223 and the second drainage groove 224 have rectangular cross-sections. In other embodiments, the first drainage groove 223 and the second drainage groove 224 have isosceles trapezoidal, semi-elliptical, or semi-circular cross-sections. As an example, such as Figure 15 As shown, the flat liquid storage layer 225 is a combination of isosceles trapezoidal prisms; in other embodiments, the flat liquid storage layer 225 has a combination of cuboid and triangular prism shapes. In some embodiments, the slit channel 226 is a cuboid with a right trapezoidal or isosceles trapezoidal cross-section. In some embodiments, such asFigure 12 and Figure 14 As shown, in the horizontal direction 500, the connection position of the flat liquid storage layer 225 and the slit channel 226 is set with equal width. In some embodiments, the flat liquid storage layer 225 has a cuboid shape; the slit channel 226 is a cuboid prism with a cross-section of a right trapezoid or an isosceles trapezoid; in the horizontal direction 500, the connection position of the flat liquid storage layer 225 and the slit channel 226 is set with equal width. Compared with traditional T-shaped or coat hanger-shaped molds, this structural design of the embodiment allows the paint 300 to flow down the wall of the flat liquid storage layer 225 at a relatively low speed and evenly under the action of gravity through the drainage groove 223, thus fundamentally avoiding the possibility of gas residue inside the cavity 220 of the two drainage molds. It can be understood that the wall of the flat liquid storage layer 225 can also be understood as the wall of the body 210 of the two drainage molds, and therefore can also be referred to as the wall of the flat liquid storage layer 225.
[0063] In order to control the flow rate of coating 300 in the flat liquid storage layer 225, in some embodiments, such as Figure 13 and Figure 14 As shown, in the gravity direction 40°, the bottom of the drainage channel 223 is spaced apart from the bottom of the groove 211. In some embodiments, such as Figure 11 and Figure 16 As shown, the top position 212 of the flat liquid storage layer 225 has a rounded corner shape. This structural design is beneficial in two ways: firstly, it facilitates the coordination with the first drainage channel 223 and the second drainage channel 224, enabling the coating 300 to flow uniformly underground in the flat liquid storage layer 225; secondly, it helps protect users and reduces safety risks during the production process.
[0064] The following is combined with Figures 11 to 16The application of the two-sided drainage self-draining mold head 200 will be further illustrated by examples. In some embodiments, the two-sided drainage mold head body 210 is made of a material with affinity coating 300, or the walls of the two-sided drainage mold head body 210 have a surface layer of material with affinity coating 300, in order to appropriately increase the contact rate with coating 300. In some embodiments, coating 300 enters the two-sided drainage mold head cavity 220 from the first side feed channel 221 and the second side feed channel 222, and then flows along the first drainage groove 223 and the second drainage groove 224 to converge in the middle region of the two-sided drainage mold head cavity 220, using the surface tension formed by the flow of coating 300 in the interlayer to balance the effect of gravity, that is, to weaken the effect of gravity. As the influence of gravity decreases, the coating 300, after entering the side-draining die cavity 220, will not flow directly and rapidly to the bottom slit channel 226, causing air bubble residue. Instead, it propels from top to bottom, from both sides towards the center, until it fills the flat liquid storage layer 225 of the side-draining die cavity 220, then enters the slit channel 226, and finally flows out of the slit channel 226. This achieves the self-draining function of the side-draining self-draining die 200, overcoming the technical problem that traditional coating dies cannot self-drain. Furthermore, the side-draining self-draining die 200 has a higher degassing efficiency, overcoming the problem of slow degassing and wasted coating 300 in traditional coating dies.
[0065] It should be noted that other embodiments of this application also include a two-sided confluence self-draining bubble mold head formed by combining the technical features of the above embodiments.
[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A two-sided confluence self-draining bubble mold head (200), characterized in that, Includes the two-sided bus head body (210); The two-sided confluence self-draining mold head (200) has two-sided confluence mold head cavities (220) in the two-sided confluence mold head body (210); The two-sided confluence mold head cavity (220) includes a first side feeding channel (221), a second side feeding channel (222), a first diversion groove (223), a second diversion groove (224), a flat liquid storage layer (225), and a slit channel (226). In the direction of gravity (400), the two confluence head bodies (210) are recessed to form a groove (211). The first drainage groove (223) and the second drainage groove (224) are located on both sides of the groove (211). The first drainage groove (223) and the second drainage groove (224) are connected to the slit channel (226) through the flat liquid storage layer (225). The flat liquid storage layer (225), the first drainage groove (223) and the second drainage groove (224) have the same top position (212). The first side feed channel (221) is connected to the top position (212) of the first diversion channel (223), and the second side feed channel (222) is connected to the top position (212) of the second diversion channel (224). In the horizontal direction (500), the thickness of the flat liquid storage layer (225) is less than a preset thickness range, so that the coating (300) has a state of contacting the inner wall of the flat liquid storage layer (225) under the action of surface tension and flowing downward in the gravity direction (400) due to gravity.
2. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The two-sided manifold head bodies (210) and the two-sided manifold head cavities (220) have overlapping symmetrical planes (600). The groove (211) is symmetrically arranged with respect to the symmetry plane (600); The flat liquid storage layer (225) is symmetrically arranged with respect to the symmetry plane (600); The first drainage channel (223) and the second drainage channel (224) are symmetrically arranged with respect to the symmetry plane (600).
3. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The groove (211) has an arc shape.
4. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The groove (211) has an obtuse angle shape.
5. The two-sided confluence self-draining bubble mold head (200) according to claim 4, characterized in that, The two-sided confluence head body (210) has a pair of bevels (213) at the groove (211); The first drainage groove (223) and the second drainage groove (224) are strip grooves that fit into the inclined side (213).
6. The two-sided confluence self-draining bubble mold head (200) according to claim 5, characterized in that, In the direction of gravity (400), the bottom position of the drainage channel (223) is separated from the bottom position of the groove (211).
7. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The top position (212) of the flat liquid storage layer (225) has a rounded corner shape.
8. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The surfaces of the first drainage channel (223) and the second drainage channel (224) adjacent to the flat liquid storage layer (225) are all connected to the flat liquid storage layer (225).
9. The two-sided confluence self-draining bubble mold head (200) according to claim 1, characterized in that, The flat liquid storage layer (225) has a cuboid shape; The slit channel (226) is a cuboid with a cross-section of a right trapezoid or an isosceles trapezoid; In the horizontal direction (500), the connection position of the flat liquid storage layer (225) and the slit channel (226) is set with the same width.
10. The two-sided confluence self-draining bubble mold head (200) according to any one of claims 1 to 9, characterized in that, The first side feed channel (221) and the second side feed channel (222) are openings or pipes.