Polyhedral dyeing device

Abstract

The present application belongs to the technical field of dyeing, and particularly relates to a polyhedral dyeing device. The polyhedral dyeing device comprises a dyeing mold, wherein one end of the dyeing mold is an open port, the dyeing mold is made of a hydrophobic material, the inner side of the dyeing mold is provided with a supporting piece, when the surface of the polyhedron to be dyed is in the same plane as the open port, the supporting piece prevents the polyhedron to be dyed from moving towards the open port, and the distance between the open port and the corresponding side of the surface to be dyed is 0.3-2 mm. The hydrophobic material and the gap prevent the dyeing liquid from upwardly infiltrating the polyhedron, which not only can avoid the low-efficiency dyeing of the adhesive tape winding the polyhedron, but also can reduce the thickness of the color bleeding and improve the dyeing effect. The present application makes the closed cavity formed by the dyeing mold and the liquid surface have a certain micro-positive pressure F, so that the liquid film formed by the open port and the side surface of the polyhedron is subjected to a certain downward air pressure, which can prevent the liquid film from upwardly infiltrating the side wall of the polyhedron to a certain extent and prevent the polyhedron side surface from being colored.

Description

Technical Field

[0001] This invention belongs to the field of dyeing technology, specifically relating to a polyhedral dyeing apparatus. Background Technology

[0002] CMY, representing cyan, magenta, and yellow, are the primary colors in a subtractive color model. This color model is used in various printing processes, such as inkjet and laser printers, as well as in other applications such as photography and artwork. When the three colors CMY are applied to different areas or surfaces of a three-dimensional model with a certain degree of transparency, the model will exhibit rich color changes with the viewing angle. Polyhedra, due to their simple and regular shape, multiple surfaces, and strong stacking and expansion capabilities, are widely accepted as craft ornaments or color recognition teaching aids. However, limited by technological capabilities and conditions, current polyhedra typically employ a method of attaching colored translucent films to the surfaces of transparent acrylic materials. This type of solution has the following problems: 1. Due to differences in the manufacturing process of the translucent film, the light transmittance of the polyhedron is usually reduced; 2. At the edges of any surface, the bonding between the translucent film and the polyhedron body will form an adhesive seam, which is prone to delamination during daily handling and use; 3. Defects may exist in the bonding process (such as air bubbles), increasing production difficulty and reducing the yield rate; 4. The color concentration of the standard translucent film is relatively fixed, making it difficult to produce products with arbitrary proportion variations; 5. Due to the planar properties of the translucent film, it is difficult to eliminate the stress caused by the bending of the translucent film when bonding it to curved or folded surfaces. This stress is at risk of detachment due to factors such as increased usage time, weakened adhesive adhesion, and temperature changes; 6. The use of translucent film inevitably involves the use of adhesive, but adhesive can negatively affect light transmittance and light uniformity.

[0003] Polyhedra can also be colored by dyeing. While this avoids problems such as adhesive peeling and the influence of adhesive light transmittance, it is prone to color bleeding when dyeing polyhedra. Color bleeding occurs when adjacent faces that do not need to be dyed are stained with color. Specifically, to prevent color bleeding between adjacent faces, when dyeing one face, tape is wrapped around the adjacent faces to prevent them from being stained. However, this method also has problems. First, the tape itself will be soaked in dye, causing the adjacent faces to be slightly stained. Second, when the tape is removed, some adhesive will remain on the adjacent faces. If the residual adhesive is not removed, it will affect the dyeing effect of the adjacent faces, resulting in uneven dyeing in some areas. Cleaning the residual adhesive on the adjacent faces greatly increases the dyeing workload and reduces the dyeing efficiency of polyhedra. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides a polyhedral staining apparatus.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A polyhedral staining apparatus is provided, comprising:

[0007] Dyeing molds;

[0008] One end of the dyeing mold is an open port, and the inner side of the open port is made of a hydrophobic material;

[0009] The dyeing mold has a support member on its inner side. When the face of the polyhedron to be dyed is in the same plane as the open port, the support member prevents the polyhedron to be dyed from moving toward the open port. The distance between the open port and the corresponding side of the face to be dyed is 0.3-2mm.

[0010] Preferably, the dyeing mold has a sealing cap on the side away from the open port, and the sealing cap is detachably and sealingly connected to the dyeing mold.

[0011] Preferably, the dyeing mold has a flexible air bladder on the side away from the open port;

[0012] The flexible airbag has a natural state and a compressed state. When subjected to external force, the flexible airbag can switch between the natural state and the compressed state. The flexible airbag is connected to the inside of the sealing cover.

[0013] Preferably, it has an air tube, a piston tube, and a piston head;

[0014] The piston tube is sealed to the inner cavity of the dyeing mold via an air pipe, and the piston tube and piston head are movably sealed together, allowing the piston head to move within the piston tube.

[0015] Preferably, the piston head has a mass block connecting end, which can be used to connect a mass block.

[0016] Preferably, it has a latch and a connector;

[0017] The buckle is fixed to the outside of the dyeing mold, one end of the connector is detachably connected to the buckle, and the other end of the connector is fixedly connected to the piston head.

[0018] Preferably, the dyeing mold has a positioning element on the side near the open port, the positioning element being used to make the surface to be dyed of the polyhedron coincide with the horizontal plane.

[0019] Preferably, the support member has a movable plate, a fixed plate, and a spring;

[0020] The movable plate is connected to the inner wall of the dyeing mold via a spring, and the fixed plate is fixedly connected to the inner wall of the dyeing mold. The lower end of the movable plate abuts against the fixed plate, and the fixed plate allows the movable plate to move only in the horizontal direction.

[0021] This invention provides a polyhedron dyeing apparatus. The beneficial effects of this invention are as follows: First, the dyeing apparatus of this application uses hydrophobic materials and gaps to prevent the dyeing liquid from seeping upwards into the polyhedron. This not only avoids the inefficient dyeing process of tape wrapping around the polyhedron but also reduces the thickness of color bleeding, improving the dyeing effect. Second, this application creates a certain positive pressure F within the sealed cavity formed by the dyeing mold and the liquid surface. This causes the liquid film formed between the open port and the side of the polyhedron to be subjected to a certain downward air pressure, which can, to a certain extent, prevent the liquid film from seeping upwards into the sidewalls of the polyhedron, preventing color bleeding on the side of the polyhedron. Attached Figure Description

[0022] Figure 1 This is a partial perspective view of one embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of an embodiment of a dyeing mold according to the present invention;

[0024] Figure 3 This is a schematic diagram of a dyeing mold mounting polyhedron according to the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0026] Figure 5 This is a perspective view of an embodiment of the present invention having a flexible airbag;

[0027] Figure 6 This is a perspective view of an embodiment of the present invention having a piston tube;

[0028] Figure 7 This is a cross-sectional view of a piston tube according to the present invention;

[0029] Figure 8 This is a force diagram of a piston head according to the present invention;

[0030] Figure 9 This is a schematic diagram of a polyhedron with uneven local staining.

[0031] Figure 10 A schematic diagram of a polyhedron with a large difference in thickness for another color stripe;

[0032] Figure 11 This is a schematic diagram of a polyhedron according to the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 0. Polyhedron; 1. Dyeing vat; 2. Support frame; 3. Dyeing mold; 4. Flexible airbag; 31. Open port; 32. Sealing cover; 33. Support component; 331. Movable plate; 332. Positioning rod; 333. Sliding track; 334. Spring; 34. Positioning component; 35. Air pipe; 36. Piston pipe; 37. Piston head; 371. Mass block connection end; 372. Connector; 373. Lock; 5. Color strip. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-11 As shown, the specific embodiments provided by the present invention are as follows: Example 1:

[0037] Existing methods for coloring polyhedra avoid problems such as adhesive peeling and the influence of adhesive transmittance. However, color bleeding is prone to occur when coloring polyhedra. Specifically, to prevent adjacent faces from being colored, tape is wrapped around the adjacent faces when coloring one face. However, this also has the following problems: First, the tape itself is soaked in the pigment, inevitably causing slight coloring of adjacent faces and affecting the coloring effect of the polyhedron. Second, when the tape is removed, some adhesive remains on the adjacent faces. If this residue is not removed, it will affect the coloring effect of adjacent faces, resulting in transparent areas and uneven coloring. Cleaning the residue from adjacent faces greatly increases the workload and reduces the coloring efficiency of polyhedra. Therefore, it is necessary to provide a device that can color efficiently and accurately.

[0038] In one alternative embodiment, a polyhedral staining apparatus, such as Figures 1-4 As shown, it includes dyeing vat 1.

[0039] 2. Support frame; 3. Dyeing mold;

[0040] The support frame 2 is located in the dyeing vat 1. The dyeing mold 3 is detachably connected to the support frame 2. The end of the dyeing mold facing the dyeing vat is an open port 31. The shape of the open port 31 is similar to the shape of the polyhedral surface to be dyed. The distance between the open port and the corresponding side of the surface to be dyed is 0.3-2mm. The inner side of the open port is made of hydrophobic material.

[0041] It should be noted that the shape of the open port 31 is similar to the shape of the polyhedron to be dyed. The polyhedron can be a cube, and the corners of the cube can be right angles or rounded corners. When the corners of the cube are right angles, the shape of the open port is a square. When the corners of the cube are rounded corners, the shape of the open port is a square with rounded corners. That is, the shape of the open end corresponds to the polyhedron to be dyed, so that after the polyhedron is installed into the mold, the distance between the open port and the corresponding side of the face to be dyed is 0.3-2mm.

[0042] The dyeing mold has a support member 33 on its inner side;

[0043] Specifically, when the face of the polyhedron to be stained is in the same plane as the open port, the support member prevents the polyhedron to be stained from moving toward the open port.

[0044] When a liquid and a gas come into contact, there exists a thin layer called the surface layer. The molecules in the surface layer are less densely packed than those in the liquid interior, and the distances between the molecules are greater. The intermolecular forces in this surface layer manifest as attraction. The force that attracts different parts of the liquid surface is called surface tension. Surface tension is the result of the intermolecular forces within the surface layer. Surface tension causes the liquid surface to tend to contract, minimizing the liquid's surface area. The force that reduces the liquid's surface area is called liquid surface tension.

[0045] In this embodiment, when the polyhedron 0 model to be dyed is placed into the dyeing mold 3, one side of the polyhedron 0 is in contact with the dyeing liquid in the dyeing tank 1, and the open port 31 is also in contact with the liquid surface of the dyeing liquid. A gap of 0.3-2mm is formed between the open port 31 and the side of the polyhedron 0. The part of the dyeing mold 3 in contact with the dyeing liquid is made of hydrophobic material, that is, the dyeing liquid will not wet the dyeing mold 3. The dyeing liquid forms a liquid film at the gap, and the liquid film is only on the liquid surface of the dyeing liquid. Since the open port 31 of the dyeing mold 3 is made of hydrophobic material, the liquid film at this point will not wet upward. This application can prevent the dyeing liquid from entering upward into the gap between the side of the polyhedron 0 and the dyeing mold 3. The thickness of the color strip produced by the existing dyeing method is 6-12mm, while the thickness of the color strip produced by the present application after dyeing the polyhedron is reduced to 0.2-4mm. The dyeing apparatus of this application prevents the dyeing liquid from seeping upwards into the polyhedron through hydrophobic materials and gaps. This not only avoids the inefficient dyeing caused by tape wrapping around the polyhedron, but also reduces color bleeding and improves the dyeing effect. Example 2:

[0046] The dyeing mold 3 has a sealing cover 32 at the end away from the open port 31. The sealing cover 32 has two states: open and closed. When the sealing cover 32 is closed, the sealing cover 32 and the dyeing mold 3 are in a sealed state. It should be noted that the connection between the sealing cover 32 and the dyeing mold 3 is a flexible part.

[0047] In this embodiment, when it is necessary to dye the polyhedron 0, the sealing cover 32 is opened, the polyhedron 0 is placed into the dyeing mold 3, and then the sealing cover 32 is closed. The dyeing mold 3 is placed on the support frame 2 and connected to the support frame 2, so that the surface to be dyed and the open port 31 are immersed in the dyeing liquid surface, so that the inner cavity of the dyeing mold 3 and the dyeing liquid surface form a closed cavity. The closed cavity has a certain air pressure, so that the liquid film formed between the open end and the side of the polyhedron 0 is subjected to a certain air pressure, which can prevent the liquid film from wetting upward to the side wall of the polyhedron 0 to a certain extent, and prevent the side of the polyhedron 0 from being dyed. Example 3:

[0048] like Figure 5 As shown, the non-open end of the dyeing mold 3 has a flexible airbag 4. The flexible airbag 4 has a natural state and a compressed state. The flexible airbag 4 becomes compressed after being squeezed by an external force, and becomes natural after being pulled by an external force. The flexible airbag 4 is connected to the inner side of the sealing cover 32.

[0049] In this embodiment, when it is necessary to dye the polyhedron 0, the sealing cover 32 is opened, the flexible airbag 4 is pulled to its natural state (bulge), the polyhedron 0 is placed into the dyeing mold 3, and then the sealing cover 32 is closed. The dyeing mold 3 is placed on the support frame 2 and connected to the support frame 2, so that the surface to be dyed and the open port 31 are immersed in the dyeing liquid surface, so that the inner cavity of the dyeing mold 3 and the dyeing liquid surface form a sealed cavity. Then, the flexible airbag 4 is pressed to compress it. During the pressing process, the inner cavity of the dyeing mold 3 and the liquid surface are always sealed. After pressing, there is a certain positive pressure in the sealed cavity, so that the liquid film formed between the open end and the side of the polyhedron 0 is subjected to a certain downward air pressure, which can prevent the liquid film from wetting the side wall of the polyhedron 0 to a certain extent, and prevent the side of the polyhedron 0 from being dyed. Example 4:

[0050] like Figures 6-8 As shown, it has an air tube 35, a piston tube 36, and a piston head 37;

[0051] The piston tube 36 is sealed to the inside of the dyeing wood mold via the air pipe 35, and the piston tube 36 and the piston head 37 are movably sealed together, allowing the piston head 37 to move within the piston tube 36.

[0052] In this embodiment, when it is necessary to dye the polyhedron 0, the sealing cover 32 is opened, the piston head 37 is fixed inside the piston tube 36, the polyhedron 0 is placed into the dyeing mold 3, then the sealing cover 32 is closed, the dyeing mold 3 is placed on the support frame 2 and connected to the support frame 2, so that the surface to be dyed and the open port 31 are immersed in the dyeing liquid, so that the inner cavity of the dyeing mold 3 and the dyeing liquid surface form a sealed cavity, and then the piston head 37 is released, as shown in the figure. Figure 8As shown, the piston head 37 is subjected to its own downward gravity G, upward thrust F, and frictional force f. When the piston head 37 is in equilibrium, it is fixed at a certain height inside the piston tube 36, and the force it experiences is F + f = G. When the surface of the dyeing liquid fluctuates, it may cause the air pressure inside the dyeing mold 3 to decrease. After the air pressure inside the dyeing mold 3 decreases, that is, after F decreases, the piston head 37 moves downward a certain distance and then stops at a certain position in the piston tube 36. At this time, the force on the piston head 37 reaches equilibrium again, that is, the force it experiences is F + f = G. This application can keep the air pressure inside the dyeing mold 3 relatively constant. This application makes the sealed cavity have a certain positive pressure F, so that the liquid film formed between the open port 31 and the side of the polyhedron 0 is subjected to a certain downward air pressure, which can prevent the liquid film from wetting the side wall of the polyhedron 0 to a certain extent, and prevent the side of the polyhedron 0 from being dyed.

[0053] It should be noted here that, as Figures 6-7 As shown, the piston head 37 can be pulled by the connector 372. One end of the connector 372 is fixedly connected to the piston head 37, and the other end of the connector 372 is detachably connected to the latch 373. When the sealing cover 32 is opened and the polyhedron 0 is placed, the connector 372 is connected to the latch 373. After the polyhedron 0 is placed and the sealing cover 32 is closed, the connection between the connector 372 and the latch 373 is released, thus completing the effect of pressurizing the dyeing cavity with the piston head 37, which further prevents the dyeing liquid from seeping upwards onto the side of the polyhedron 0. Example 5:

[0054] like Figure 7 As shown, the piston head 37 has a mass block connecting end 371, which can be used to connect a mass block. The required micro-positive pressure varies depending on the environment in which the polyhedron is dyed. The magnitude of the micro-positive pressure can be changed by altering the mass of the piston head. When a mass block is added to the piston head, the air pressure inside the dyeing mold increases; conversely, reducing the mass block on the piston head decreases the air pressure inside the dyeing mold. Example 6:

[0055] Because pigment precipitation can occur in the dyeing liquid, it needs to be stirred regularly. Stirring introduces air bubbles, which float on the surface. When these bubbles are present on the surface of the polyhedron that is being dyed, it leads to uneven dyeing in certain areas. Figure 9 As shown, the surface of the polyhedron has elliptical light-colored areas, which greatly reduces its aesthetic appeal. These elliptical light-colored areas are caused by air bubbles during the dyeing process. These air bubbles result in poor dyeing of the polyhedron and a decreased yield.

[0056] Therefore, the open port 31 of the mold in this application is 2-3 mm lower than the lowest sidewall of the dyeing tank. In this embodiment, the open port of the mold is 2-3 mm lower than the lowest sidewall of the dyeing tank. That is, the open end of the mold and the polyhedron are immersed together in the dyeing liquid to a depth of 2-3 mm. At this time, the surface to be dyed is located at a depth of 2-3 mm below the liquid surface. On the one hand, the surface to be dyed of the polyhedron is subjected to greater pressure from the dyeing liquid, resulting in a better dyeing effect. On the other hand, since the surface to be dyed of the polyhedron is below the liquid surface, while most air bubbles float on the liquid surface, this application can avoid the surface to be dyed from contacting air bubbles, thereby greatly reducing the occurrence of elliptical light-colored areas in the polyhedron and improving the dyeing yield. Example 7:

[0057] Existing staining methods for polyhedra often result in uneven color stripes on the sides of the polyhedron due to the polyhedron's tilt, as the face to be stained has a certain angle with the liquid surface. This significantly affects the polyhedron's aesthetics.

[0058] In this embodiment, a positioning element 34 is provided on the side of the dyeing mold 3 near the open port 31. The positioning element 34 is used to ensure that the surface of the polyhedron to be dyed is on the same plane as the open port 31. This application uses the positioning element 34 to ensure that the surface of the polyhedron 0 to be dyed is parallel to the liquid surface, avoiding color stripes with large thickness differences that would affect the aesthetics of the polyhedron 0. Example 8:

[0059] In this embodiment, the support member has a movable plate, a fixed plate, and a spring;

[0060] The movable plate is connected to the inner wall of the dyeing mold via a spring, and the fixed plate is fixedly connected to the inner wall of the dyeing mold. The lower end of the movable plate abuts against the fixed plate, and the fixed plate allows the movable plate to move only in the horizontal direction.

[0061] In another alternative embodiment, such as Figures 2-3 As shown, the support member 33 has a movable plate 331, a positioning rod 332, a sliding rail 333 and a spring 334;

[0062] The movable plate 331 is fixedly connected to the movable rod, and the other end of the movable rod extends into the sliding track 333. One end of the spring 334 is fixed to the end of the sliding track 333 near the movable plate 331, and the other end of the spring 334 abuts against the movable plate 331. The movable rod can only move in the sliding track 333.

[0063] In this embodiment, the upper opening of the movable plate 331 is larger. When the polyhedron 0 is placed into the dyeing mold 3, the polyhedron 0 first presses the movable plate 331 outwards, causing the movable plate 331 to compress the spring 334, which in turn moves the movable rod away from the polyhedron 0. At this point, the polyhedron 0 is pressed until the surface to be dyed is flush with the open port 31. The downward pressure on the polyhedron 0 then stops. Due to the pressure from the movable plate 331, the polyhedron 0 is fixed in the dyeing mold 3 without external force. This application uses the support member 33 to prevent the polyhedron to be dyed from moving towards the open port 31. Example 9:

[0064] A stained polyhedron, comprising,

[0065] A transparent polyhedron with at least two colored faces. Each of the two colored faces is colored with a different color, which is the color in the subtractive color model.

[0066] Each colored face has a color stripe 5 on the side closest to that colored face on its adjacent face. The color stripe has the same color as the colored face, and the maximum distance from the color stripe to the colored face is 0.2-4mm. The color stripe in this application is thinner, resulting in better aesthetics. Compared to adhesive bonding on the surface of a polyhedron, where the adhesive layer is prone to peeling and affects the appearance and handling, the polyhedron in this application, after being dyed, has no excess material, allowing it to maintain its original condition for a long time. This extends the product's lifespan while preserving its aesthetic appeal.

[0067] Color mixing is divided into additive color mixing, subtractive color mixing, and intermediate mixing. Additive color mixing, also known as light mixing, involves mixing light of different wavelengths. For example, red light and green light combine to form yellow light, and mixing red, green, and blue light results in white light. Mixing two or more types of light together increases brightness; the total brightness of the mixed color is equal to the sum of the brightness of each individual color. Subtractive color mixing, also known as pigment mixing, involves mixing pigments of different colors. This is a process of subtracting light waves; certain wavelengths of light are absorbed by the pigment, and the colors we see are those of light waves that were not absorbed by the pigment surface. For example, mixing yellow and blue pigments creates green, and mixing green, yellow, and red pigments together produces black.

[0068] It should be noted that the colors of the polyhedron can be multiple, and subtractive color mixing can take many forms, such as CMY (cyan, magenta, yellow), RYB (red, yellow, blue), etc., without specific limitations here. The shape of the polyhedron is not limited to a hexahedron. Figure 5 The polyhedron shown is just a schematic diagram; polyhedra can also be tetrahedrons, hexahedrons, octahedrons, dodecahedrons, etc.

[0069] In one optional embodiment, the polyhedron is a regular tetrahedron with sharp corners at the intersections of its four faces. The tetrahedron has three colored faces on its four faces, with the colors being cyan, magenta, and yellow, respectively. The maximum thickness of the color strip is 0.2 mm.

[0070] In another optional embodiment, the polyhedron is a regular hexahedron with rounded corners at the intersections of the six faces. The six faces of the regular hexahedron have six colored faces, with a total of three colors: red, yellow, and blue. Opposite faces have the same color, and the maximum distance between a color bar and the plane containing its nearest colored face is 3 mm.

[0071] It can be produced by a polyhedral staining apparatus.

[0072] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inner", "outer", "inner side", "outer side", etc. indicate the orientation or positional relationship.

[0073] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0074] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0075] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0076] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyhedral dyeing apparatus for dyeing a polyhedron, characterized by comprising: Comprising, a dyeing mold; wherein one end of the dyeing mold is an open port, and the inner side of the open port is a hydrophobic material; the inner side of the dyeing mold has a support for supporting a polyhedron, so that when the surface to be dyed of the polyhedron is in the same plane as the open port, the support prevents the polyhedron to be dyed from moving towards the open port, and the distance between the open port and the side of the surface to be dyed of the polyhedron to be dyed is 0.3-2mm; the dyeing mold has a sealing cover on the side far from the open port, and the sealing cover is detachably and sealingly connected with the dyeing mold; the dyeing mold also has a flexible air bag on the side far from the open port; the flexible air bag has a natural state and a compressed state, and can be switched between the natural state and the compressed state under external force, and the flexible air bag is in communication with the inner side of the sealing cover.

2. The polyhedron dyeing device according to claim 1, wherein, having a gas pipe, a piston pipe and a piston head; wherein the piston pipe is sealingly connected with the inner cavity of the dyeing mold through the gas pipe, the piston pipe is movably connected with the piston head, and the piston head can move in the piston pipe.

3. The polyhedron dyeing device according to claim 2, wherein, the piston head has a mass block connecting end, and the mass block connecting end is used for connecting a mass block.

4. The polyhedron dyeing device according to claim 3, wherein, having a lock buckle and a connecting piece; wherein the lock buckle is fixed on the outer side of the dyeing mold, one end of the connecting piece is detachably connected with the lock buckle, and the other end of the connecting piece is fixedly connected with the piston head.

5. The polyhedron dyeing device according to claim 4, wherein, the dyeing mold has a positioning piece on the side close to the open port, and the positioning piece is used for making the surface to be dyed of the polyhedron coincide with the horizontal plane.

6. The polyhedron dyeing device according to claim 5, wherein, the support has a movable plate, a fixed plate and a spring; wherein the movable plate is connected with the inner side wall of the dyeing mold through the spring, the fixed plate is fixedly connected with the inner side wall of the dyeing mold, the lower end of the movable plate abuts against the fixed plate, and the fixed plate makes the movable plate only move in the horizontal direction.

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