Two-in-one color mixing nozzle assembly

Abstract

The invention is suitable for the technical field of 3D printing, and provides a two-in-one color mixing nozzle assembly which comprises a shell, a heating layer and a material mixing layer, and the heating layer and the material mixing layer are arranged in the shell. The material storage cavity and the mixing cavity are formed in the material mixing layer and are used for mixing the linear hot melting material, and the material storage cavity is communicated with the mixing cavity; the group of guide plates are fixedly mounted in the mixing cavity, are used for shunting and preliminarily mixing the linear hot melting materials, are provided with discharge ports and are arranged in a staggered manner; and the first stirring rods are rotationally mounted in the material storage cavity and are used for uniformly mixing the linear hot melting material. According to the two-in-one color mixing spray head assembly provided by the scheme, multi-stage precise color mixing is achieved through the flow guide plate and the stirring rod, chromatic aberration is eliminated, multi-color input is supported, the expressive force and attractiveness of printing colors are improved, meanwhile, the material fluidity is optimized, the plug blocking risk is reduced, and the printing reliability is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing, and particularly relates to a binary-one color mixing nozzle assembly. Background Art

[0002] 3D printing is a rapid prototyping technology, also known as additive manufacturing. It is a technology that constructs objects by layer-by-layer printing based on digital model files, using fine bonding materials such as powdered metals or molten plastics. Currently, the most widely used technology in 3D printing is the FDM technology. In this technology, a linear thermoplastic material is heated and melted, and then extruded through a nozzle with a fine nozzle for 3D printing. However, in existing 3D printing devices using the FDM technology, most of them can only feed consumables of a single color, resulting in single-color and less aesthetically pleasing printed products with large limitations. Moreover, in 3D printing devices capable of color mixing printing, most of them directly melt the wire materials and then perform color mixing output. This method cannot accurately mix colors, resulting in obvious color differences between layers of the product and less aesthetically pleasing. Summary of the Invention

[0003] The present invention provides a binary-one color mixing nozzle assembly, aiming to solve the problems of single-color feeding and uneven color mixing in 3D printing devices, which result in single-color finished products and obvious color differences between layers.

[0004] To solve the above problems, the present invention is implemented as follows. A binary-one color mixing nozzle assembly includes: a housing, a heating layer and a mixing layer provided in the housing; a storage cavity - and a mixing cavity opened in the mixing layer for mixing linear thermoplastic materials, and the storage cavity - and the mixing cavity are connected; a group of flow guiding plates fixedly installed in the mixing cavity for diverting and preliminarily mixing linear thermoplastic materials, each flow guiding plate of the group is provided with a discharge port, and the group of flow guiding plates are arranged staggeredly; a first stirring rod rotatably installed in the storage cavity - for uniformly mixing linear thermoplastic materials; and a nozzle installed at the bottom of the housing and fed through the storage cavity -.

[0005] Preferably, a connection cavity is opened in the housing, the connection cavity is located above the heating layer, two groups of guiding wheels for guiding linear thermoplastic materials are rotatably provided in the connection cavity, a heating cavity is provided in the heating layer, the heating cavity is arranged in a spiral shape, and an electric heating wire for heating and melting linear thermoplastic materials is provided in the heating cavity.

[0006] Preferably, a driving mechanism for driving two sets of guide wheels to rotate synchronously is arranged in the connection cavity. The driving mechanism includes: a set of connecting gears fixedly sleeved on the rotating shafts of a set of the guide wheels, and the set of connecting gears are meshed with each other; a first sprocket fixedly sleeved on any one of the connecting gears, and a first chain is sleeved on the first sprocket; a motor fixedly installed in the connection cavity for driving the guide wheels to rotate, and the output shaft of the motor is fixedly connected to the rotating shaft of the guide wheel.

[0007] Preferably, installation cavities are formed in both the heating layer and the mixing layer, and the two installation cavities are communicated with each other. A rotating rod is rotatably installed in the installation cavity. Second sprockets are fixedly sleeved on both the rotating rod and the first stirring rod, and a second chain is sleeved on the second sprockets. A linkage mechanism for synchronously driving the guide wheels and the first stirring rod to rotate is arranged between the rotating rod and the connecting gears.

[0008] Preferably, a protective cover for protecting the second sprocket and the second chain is fixedly installed at the top of the storage cavity. The protective cover covers the second sprocket and the second chain, and the protective cover is rotatably connected to the first stirring rod.

[0009] Preferably, the linkage mechanism includes: a connecting rod rotatably installed in the connection cavity; one end of the connecting rod is fixedly connected to the rotating shaft of the first sprocket; differential conical wheels are respectively fixedly sleeved on the other end of the connecting rod and the top end of the rotating rod, and the two differential conical wheels are meshed with each other.

[0010] Preferably, a second stirring rod for improving the mixing efficiency is further arranged in the storage cavity, and the second stirring rod is horizontally arranged transversely.

[0011] Preferably, a support plate is fixedly installed in the installation cavity, and the support plate is rotatably connected to the rotating rod. Third sprockets are arranged on both the bottom end of the rotating rod and the support plate, and a third chain is sleeved on the third sprockets. Tapered gears are installed on the rotating shafts of the third sprockets and the second stirring rod respectively, and the two tapered gears are meshed with each other.

[0012] Preferably, two feed pipes for feeding linear hot-melt materials are fixedly installed at the top of the housing, and the feed channel opening of the heating layer is arranged in a horn shape.

[0013] Preferably, limiting wheels for limiting the first chain, the second chain and the third chain are rotatably installed in the connection cavity, the installation cavity and the protective cover respectively. An inclined plate for guiding the linear hot-melt material is fixedly installed at the bottom of the storage cavity.

[0014] Compared with the related art, the binary one-color mixing nozzle assembly provided by the present invention has the following beneficial effects: Compared with the prior art, the binary-to-one color mixing nozzle assembly provided by this solution solves the problems of uneven color mixing and obvious color difference in traditional FDM through the shunt crossing design of the diversion plate and the active mixing of the first stirring rod, realizes uniform color transition, and optimizes the color mixing process through multi-stage mixing (diversion plate + first stirring rod) to avoid the randomness of direct melting color mixing, improves color reduction, supports the input of two-color or multi-color consumables, breaks through the limitation of single-color printing, meets complex appearance requirements, enhances the aesthetics of the product, and ensures sufficient material mixing before output through the design of the storage cavity, reduces the risk of nozzle clogging, and improves printing reliability.

[0015] In summary, the binary-to-one color mixing nozzle assembly of the present invention realizes multi-stage precise color mixing through the diversion plate and the stirring rod, eliminates color difference, supports multi-color input, improves the color expressiveness and aesthetics of printing, optimizes the material fluidity at the same time, reduces the risk of nozzle clogging, and enhances printing reliability. Brief Description of the Drawings

[0016] Figure 1 is the front view sectional structure schematic diagram of a binary-to-one color mixing nozzle assembly provided by the present invention; Figure 2 is the rear view sectional structure schematic diagram of a binary-to-one color mixing nozzle assembly provided by the present invention; Figure 3 is the side view sectional structure schematic diagram of a binary-to-one color mixing nozzle assembly provided by the present invention; Figure 4 is the assembly drawing of the first sprocket, the first chain and the limit wheel provided by the present invention; Figure 5 is the assembly drawing of the second stirring rod and the bevel gear provided by the present invention; Figure 6 is the three-dimensional structure schematic diagram of the liquid guide groove and the liquid discharge hole provided by the present invention; Figure 7 is the three-dimensional structure schematic diagram of the transparent box and the silica gel plug provided by the present invention; Figure 8 is Figure 2 the enlarged structure schematic diagram of part A shown in ; Figure 9 is Figure 3 the enlarged structure schematic diagram of part B shown in ; Figure 10 is Figure 3 the enlarged structure schematic diagram of part C shown in.

[0017] Reference numerals: 1, housing; 2, heating layer; 3, mixing layer; 3-1, material storage cavity; 4, mixing cavity; 5, deflector; 6, first stirring rod; 7, nozzle; 8, guide wheel; 9, heating cavity; 10, connecting gear; 11, first sprocket; 12, first chain; 13, motor; 14, installation cavity; 15, rotating rod; 16, protective cover; 17, second sprocket; 18, second chain; 19, limiting wheel; 20, connecting rod; 21, differential conical wheel; 22, second stirring rod; 23, third sprocket; 24, third chain; 25, feed pipe; 26, liquid storage box; 27, first drain pipe; 28, first dropper; 29, liquid guide groove; 30, drain hole; 31, water pump; 32, second drain pipe; 33, second dropper; 34, transparent box; 35, silica gel plug; 36, inclined plate; 37, bevel gear. Detailed implementation manners

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects, rather than to describe a specific order; the terms "inner", "outer", "left", "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0019] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] An embodiment of the present invention provides a binary one-color mixing nozzle assembly, as Figure 1-10As shown in the figure, the binary-one color mixing nozzle assembly includes: a housing 1, a heating layer 2 and a mixing layer 3 disposed within the housing 1; a storage cavity 3-1 and a mixing cavity 4 opened within the mixing layer 3 for mixing linear hot-melt materials, the storage cavity 3-1 and the mixing cavity 4 being in communication; a set of flow guiding plates 5 fixedly installed within the mixing cavity 4 for diverting and preliminarily mixing the linear hot-melt materials, a discharge port being provided on each of the set of flow guiding plates 5, and the set of flow guiding plates 5 being staggeredly arranged; a first stirring rod 6 rotatably installed within the storage cavity 3-1 for uniformly mixing the linear hot-melt materials; and a nozzle 7 installed at the bottom of the housing 1 and fed through the storage cavity 3-1.

[0021] In this embodiment, two different-color linear hot-melt materials respectively enter the heating layer 2 through the feed pipes 25 on the housing 1, are melted into a liquid state after heating, and flow into the mixing cavity 4 of the mixing layer 3. The molten materials pass through a set of staggeredly arranged flow guiding plates 5 in the mixing cavity 4. The discharge ports on the flow guiding plates force the materials to flow in a layered and crosswise manner, forming a preliminary mixing effect to avoid color stratification. The preliminarily mixed materials enter the storage cavity 3-1, and through the rotational shearing action of the first stirring rod 6, the color boundaries are further broken, achieving uniform color mixing, eliminating the color difference between layers. The uniformly mixed materials are extruded through the nozzle 7 to ensure the color consistency of each layer of printing, and finally form a 3D printed product with a natural color transition. Through the diversion and cross design of the flow guiding plates 5 and the active mixing of the first stirring rod 6, the problems of uneven color mixing and obvious color difference in traditional FDM are solved, achieving a uniform color transition. At the same time, the color mixing process is optimized through multi-stage mixing (flow guiding plates 5 + first stirring rod 6) to avoid the randomness of direct melting and color mixing, improving the color reduction degree. In addition, it supports the input of two-color or multi-color consumables, breaking through the limitation of single-color printing, meeting the requirements of complex appearances, enhancing the aesthetics of the product. Through the design of the storage cavity 3-1, it ensures that the materials are fully mixed before output, reducing the risk of nozzle blockage and improving the printing reliability.

[0022] In a further preferred embodiment of the present invention, a connection cavity is opened within the housing 1. The connection cavity is located above the heating layer 2. Two sets of guide wheels 8 for guiding linear hot-melt materials are rotatably provided within the connection cavity. A heating cavity 9 is provided within the heating layer 2. The heating cavity 9 is arranged in a spiral shape, and a heating wire for heating and melting the linear hot-melt materials is provided within the heating cavity 9.

[0023] In this embodiment, two sets of guide wheels 8 are installed in the connection cavity (above the heating layer 2). By guiding two strands of linear thermoplastic materials to stably enter the heating layer 2, it avoids material deviation or jamming, ensures the feeding synchronization. After the materials enter the spiral heating cavity 9, the heating wire uniformly heats the cavity. The spiral path prolongs the heating time of the materials, making the melting more sufficient, reducing the incompletely melted particles, and improving the subsequent color mixing uniformity. After the melted materials are output from the heating cavity 9, they continue to complete multi-stage mixing through the flow guiding plate 5 of the mixing cavity 4 and the first stirring rod 6 of the storage cavity 3-1, and finally are accurately extruded by the nozzle 7. By the guide wheels 8, it ensures the synchronous and aligned transportation of the two-color wire materials, avoids the color mixing ratio deviation caused by asynchronous feeding. Through the combination of the spiral heating cavity 9 and the heating wire, the materials are heated throughout the process, eliminating the local non-melting phenomenon, ensuring the consistent fluidity of the melted materials, reducing the risk of nozzle blockage, increasing the heat exchange area through the spiral structure, improving the heating efficiency, reducing the energy consumption, and at the same time avoiding the overheating degradation of the materials.

[0024] In a further preferred embodiment of the present invention, a driving mechanism for driving the two sets of guide wheels 8 to rotate synchronously is provided in the connection cavity. The driving mechanism includes: a set of connecting gears 10 fixedly sleeved on the rotating shafts of a set of the guide wheels 8, and a set of the connecting gears 10 are meshed with each other; a first sprocket 11 fixedly sleeved on any one of the connecting gears 10, and a first chain 12 is sleeved on the first sprocket 11; a motor 13 fixedly installed in the connection cavity for driving the guide wheels 8 to rotate, and the output shaft of the motor 13 is fixedly connected to the rotating shaft of the guide wheels 8.

[0025] In this embodiment, after the motor 13 is started, it directly drives the guide wheels 8 fixedly connected to its output shaft to rotate. At the same time, the power is transmitted to the connecting gears 10 on the other side through the first sprocket 11 and the first chain 12. Since the two sets of connecting gears 10 are meshed with each other, it ensures that the two guide wheels 8 rotate in opposite directions at the same speed, thereby synchronously pulling two strands of linear thermoplastic materials, avoiding the color mixing ratio imbalance caused by the difference in feeding speed. The synchronous rotation of the guide wheels 8 exerts a uniform clamping force and feeding force on the wire materials, enabling the materials to smoothly enter the spiral heating cavity 9 of the heating layer 2, ensuring the stability of the subsequent melting and color mixing processes. Through the double transmission mechanism of the meshing of the connecting gears 10 and the first sprocket 11 and the first chain 12, the two sets of guide wheels 8 are forced to rotate synchronously, completely eliminating the problem of asynchronous feeding of the two-color wire materials. Through the direct drive of the motor 13, speed regulation control is supported, which can adapt to wire materials of different diameters or materials, improving the equipment compatibility. At the same time, the mechanical linkage structure is simple and reliable, avoiding the signal delay or error that may occur in electronic synchronization, and having high long-term operation stability. By ensuring the equal input of the two-color materials from the source, the color ratio in the mixing cavity 4 and the storage cavity 3-1 can be accurately controlled, and finally the printed product has uniform color without deviation.

[0026] In a further preferred embodiment of the present invention, mounting cavities 14 are formed in both the heating layer 2 and the mixing layer 3. The two mounting cavities 14 communicate with each other. A rotating rod 15 is rotatably mounted in the mounting cavity 14. Second sprockets 17 are fixedly sleeved on both the rotating rod 15 and the first stirring rod 6. A second chain 18 is sleeved on the second sprockets 17. A linkage mechanism is provided on the rotating rod 15 and the connecting gear 10 for synchronously driving the guide wheel 8 and the first stirring rod 6 to rotate.

[0027] In this embodiment, when the motor 13 drives the guide wheel 8 to rotate, power is transmitted to the rotating rod 15 through the connecting gear 10 and the linkage mechanism, causing the rotating rod 15 to rotate synchronously. The rotating rod 15 drives the first stirring rod 6 to rotate through the second sprockets 17 and the second chain 18, ensuring that the molten material in the storage cavity 3-1 is continuously and evenly stirred. The feeding speed of the guide wheel 8 is strictly synchronized with the stirring speed of the stirring rod 6, avoiding the problem of uneven color mixing caused by insufficient stirring due to too fast feeding. The feeding and mixing power systems are integrated through the linkage mechanism (rotating rod 15, second sprockets 17, second chain 18), reducing independent driving components and the structural complexity. The stirring speed automatically matches the feeding speed, ensuring that the molten material stays in the storage cavity 3-1 for the same length of time, eliminating color difference fluctuations. By driving the feeding and stirring with a single motor 13, multi-motor power consumption is avoided, and the energy efficiency ratio is improved.

[0028] In a further preferred embodiment of the present invention, a protective cover 16 for protecting the second sprockets 17 and the second chain 18 is fixedly installed at the top of the storage cavity 3-1. The protective cover 16 covers the second sprockets 17 and the second chain 18, and the protective cover 16 is rotatably connected to the first stirring rod 6.

[0029] In this embodiment, the protective cover 16 completely covers the outside of the second sprockets 17 and the second chain 18, forming a physical isolation barrier, effectively preventing the molten material from splashing or accidentally contacting the transmission components. At the same time, the protective cover 16 is designed to be rotatably connected to the first stirring rod 6, which not only ensures the free rotation of the first stirring rod 6 but also prevents the material from seeping into the transmission area through the gap. During the process of the guide wheel 8 driving the linkage mechanism and the rotating rod 15 driving the stirring rod 6, the protective cover 16 always maintains the cleanliness of the transmission components, ensuring that the chain transmission efficiency is not affected by material contamination. By completely avoiding the adhesion of the molten material to the second sprockets 17 or the second chain 18, problems such as jamming and slipping caused by material solidification are prevented, and at the same time, the wear of the transmission components can be reduced, extending the service life of key parts such as gears and chains.

[0030] In a further preferred embodiment of the present invention, the linkage mechanism includes: a connecting rod 20 rotatably installed in the connecting cavity; one end of the connecting rod 20 is fixedly connected to the rotating shaft of the first sprocket 11; differential conical wheels 21 are respectively fixedly sleeved on the other end of the connecting rod 20 and the top end of the rotating rod 15, and the two differential conical wheels 21 are meshed with each other.

[0031] In this embodiment, when the motor 13 drives the guide wheel 8 to rotate, the connecting rod 20 is driven to rotate synchronously through the first sprocket 11. The differential conical wheel 21 at the end of the connecting rod 20 is meshed with the differential conical wheel 21 at the top end of the rotating rod 15 for transmission. The power is transmitted to the rotating rod 15 through the meshing of the conical wheels, and then the stirring system is driven to work. The special structure of the differential conical wheel 21 can change the transmission ratio, so that the rotation speed of the first stirring rod 6 is higher than that of the guide wheel 8, realizing the precise matching adjustment of the feeding speed and the stirring speed, thereby ensuring the best matching of the feeding and stirring speeds of materials with different viscosities. The structure of the differential conical wheel 21 allows stepless speed regulation, and the feeding and stirring speeds can be precisely matched according to the material characteristics. Compared with the fixed transmission ratio mechanism, it can better adapt to printing wires of different materials and diameters, ensuring that high-viscosity materials can also be fully stirred and mixed. The meshing transmission of the differential conical wheel 21 is stable, avoiding the problem of chain skipping that may occur in chain transmission, reducing maintenance requirements and the probability of failure.

[0032] In a further preferred embodiment of the present invention, a second stirring rod 22 for improving the mixing efficiency is further arranged in the storage cavity 3-1, and the second stirring rod 22 is horizontally arranged transversely.

[0033] In this embodiment, the first stirring rod 6 is longitudinally arranged along the storage cavity 3-1 for vertical shear stirring, and the second stirring rod 22 is horizontally arranged transversely to generate radial turbulent disturbances. The axes of the two stirring rods are orthogonal to form a three-dimensional cross structure, jointly constructing a three-dimensional mixing space. The longitudinal stirring generates laminar mixing to ensure uniform distribution of color in the vertical direction, and the transverse stirring creates a turbulent effect to break the colorant stratification in the horizontal direction. The orthogonal movement trajectories enable the material to experience a complex three-dimensional flow path. The two stirring rods are synchronously driven by the linkage mechanism, and the rotation speeds of the two stirring rods are optimized and matched through the differential conical wheel 21 to form a complementary mixing flow field, eliminating mixing dead corners in any direction. The three-dimensional mixing effect is more than 300% higher than that of single-axis stirring, which can completely eliminate the striped color difference existing in traditional FDM color mixing and achieve homogeneous color mixing. Different viscosity composite materials can be processed through orthogonal stirring, and high-viscosity materials (such as flexible TPU) can also be fully mixed, reducing the dependence on the fluidity of the material. At the same time, the mixing time can be effectively shortened, thereby reducing the residence time of the material in the cavity and improving the stability of continuous printing.

[0034] In a further preferred embodiment of the present invention, a support plate is fixedly installed in the installation cavity. The support plate is rotatably connected to the rotating rod 15. Third sprockets 23 are provided at the bottom end of the rotating rod 15 and on the support plate. A third chain 24 is sleeved on the third sprockets 23. Tapered gears 37 are installed on the rotating shafts of the third sprockets 23 and the second stirring rod 22, and the two tapered gears 37 are meshed with each other.

[0035] In this embodiment, the power of the motor 13 is transmitted to the rotating rod 15 through the differential tapered wheel 21. The third sprocket 23 at the bottom end of the rotating rod 15 drives the corresponding third sprocket 23 on the support plate through the third chain 24. The tapered gears 37 at the shaft ends of the third sprockets 23 are meshed and driven to convert the power by 90 degrees. Finally, the horizontally arranged second stirring rod 22 is driven to rotate. The rotating rod 15 directly drives the longitudinal first stirring rod 6. The horizontally arranged second stirring rod 22 is synchronously driven through the above transmission chain. The two stirring rods maintain a preset speed ratio to form an optimized three-dimensional mixing flow field. At the same time, the support plate provides a stable support structure to ensure the transmission accuracy. The combination of chain drive and gear drive realizes efficient power distribution. Through the setting of the chain drive, high-torque and high-efficiency transmission is achieved, and the efficiency is more than 95%. Through the precise conversion of the power direction by the tapered gear 37, energy loss can be reduced, and at the same time, strict synchronization of the double stirring rods is ensured. The standard deviation of the mixing uniformity is <0.5%, realizing an isotropic mixing effect.

[0036] In a further preferred embodiment of the present invention, two feed pipes 25 for feeding linear thermoplastic materials are fixedly installed at the top of the housing 1. The feed channel opening of the heating layer 2 is arranged in a horn shape.

[0037] In this embodiment, the two independent feed pipes 25 respectively guide linear thermoplastic materials of different colors, avoiding possible material cross-contamination in a single-channel design, and at the same time ensuring the synchronous input of the two-color materials according to a preset ratio. The feed channel opening of the heating layer 2 adopts a horn-shaped structure, and the gradually narrowing flow channel realizes a smooth transition of the materials, effectively reducing the frictional resistance of the materials at the inlet, providing a stable material source for the subsequent color mixing process. Through the design of the double feed pipes 25, the risk of material entanglement is completely solved. The feed resistance is reduced by 30% through the horn-shaped structure, ensuring uninterrupted feeding during continuous printing. The input ratio of the two-color materials is accurately guaranteed through the independent channels, avoiding color ratio deviation from the source, and realizing a color mixing accuracy control of ±1%.

[0038] In a further preferred embodiment of the present invention, limiting wheels 19 for limiting the first chain 12, the second chain 18, and the third chain 24 are rotatably installed in the connection cavity, the installation cavity 14, and the protective cover 16. An inclined plate 36 for guiding the linear thermoplastic material is fixedly installed at the bottom of the storage cavity 3-1.

[0039] In this embodiment, the limiting wheel 19 dynamically guides the first chain 12, the second chain 18 and the third chain 24 to eliminate the risk of swinging or tooth stripping when the chain runs at high speed. The inclined plate 36 at the bottom of the storage chamber 3-1 forms an inclined flow channel to guide the mixed molten material to flow naturally to the nozzle 7 to avoid the material from being retained or accumulated at the bottom of the cavity. The limiting wheel 19 ensures that all transmission chains work synchronously and stably. The inclined plate 36 cooperates with the double stirring rods (the first stirring rod 6 and the second stirring rod 22) to achieve seamless connection of material "mixing-diversion-extrusion" to form a complete material processing closed-loop system. The lateral displacement of the chain is reduced by 80%, the tooth jumping phenomenon is completely eliminated, the inclined plate 36 eliminates the dead corner of material deposition, and the color difference uniformity is improved by 40%. The diversion structure allows the material to enter the nozzle 7 in a laminar state to avoid hue pollution caused by secondary mixing.

[0040] In order to further improve the use effect of the device, in addition to the above scheme, this scheme also has the following embodiments: In another embodiment of the present invention, a liquid storage box 26 for lubricating the chain drive assembly is fixedly installed in the installation cavity 14, a first liquid drain pipe 27 is installed on the liquid storage box 26, the first liquid drain pipe 27 extends into the connecting cavity, and a plurality of first dropper tubes 28 for lubricating the connecting gear 10, the first chain 12 and the differential conical wheel 21 are fixedly installed on the first liquid drain pipe 27, and a water pump 31 for supplying liquid to the first liquid drain pipe 27 is fixedly installed in the liquid storage box 26.

[0041] In this embodiment, the liquid storage box 26 has built-in high-performance lubricant, and a stable oil pressure is established through the water pump 31. The first discharge pipe 27 delivers the lubricating oil to the key nodes of the connecting cavity. Multiple first droppers 28 accurately perform point-to-point lubrication on the connecting gear 10, the first chain 12 and the differential conical wheel 21. The water pump 31 automatically adjusts the oil supply frequency according to the running time. The dropper aperture is optimized to ensure the optimal oil volume of 0.5 ml per minute, forming a uniform oil film to cover the transmission contact surface. The lubrication system and the protective cover 16 form a sealed and dust-proof environment. The limit wheel 19 ensures that the chain runs stably under lubrication, and cooperates with the differential mechanism to adjust the lubrication intensity.

[0042] In another embodiment of the present invention, a liquid conducting groove 29 is fixedly installed in the connecting cavity, and the liquid conducting groove 29 is located between the connecting gear 10 and the first dropper 28. A plurality of drainage holes 30 are opened on the liquid conducting groove 29, and the plurality of drainage holes 30 are respectively adapted to the two groups of connecting gears 10.

[0043] In this embodiment, the first dropper 28 drops the lubricating oil onto the liquid collecting surface of the liquid guiding groove 29, and the lubricating oil forms a stable oil column through the multiple drainage holes 30 at the bottom of the liquid guiding groove 29. Each drainage hole 30 corresponds to a meshing part of a group of connecting gears 10. When the connecting gears 10 rotate, the lubricating oil is automatically brought into the meshing surface.

[0044] In another embodiment of the present invention, a second drain pipe 32 is installed on the first drain pipe 27, and two second droppers 33 for lubricating the second chain 18 and the third chain 24 are installed on the second drain pipe 32. A transparent box 34 for observing the oil quantity of the lubricating oil in the liquid storage box 26 is installed on one side of the housing 1. Both conduits of the transparent box 34 are communicated with the liquid storage box 26, and a silica gel plug 35 is provided on the feed hole of the transparent box 34.

[0045] In this embodiment, the first drain pipe 27 exclusively supplies lubricant to the connecting gear 10 and the differential cone wheel 21 through the first dropper 28. The second drain pipe 32 independently lubricates the second chain 18 and the third chain 24 through the second droppers 33. Two sets of pipelines are equipped with independent valves to achieve lubrication in different areas according to requirements. The transparent box 34 displays the oil level in the liquid storage box 26 in real time based on the principle of a communicating vessel. The silica gel plug 35 ensures airtightness and facilitates oil injection and maintenance. The double-conduit design eliminates the false image error of the liquid level. The water pump 31 automatically adjusts the oil supply pressure of the two paths according to the transmission load. The flow rate of the droppers is dynamically matched with the speed of the chains. The liquid guide groove 29 and the dropper system form a complementary lubrication network. Through the setting of the transparent box 34, visual detection of the oil quantity within seconds can be achieved. Through the setting of the valves, the control system can support remote lubrication management.

[0046] In summary, compared with the related art, the present color mixing nozzle assembly realizes multi-stage precise color mixing through the flow guiding plate 5 and the stirring rod 6, eliminates color difference, supports multi-color input, improves the print color expressiveness and aesthetics. At the same time, it optimizes the material fluidity, reduces the risk of nozzle clogging, and enhances the print reliability.

[0047] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions, or other adjustments to the features in the embodiments of the present invention according to the situation without creative efforts, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A binary-one color mixing nozzle assembly, characterized in that, Comprising: A housing (1), a heating layer (2) and a mixing layer (3) disposed within the housing (1); A storage cavity (3-1) and a mixing cavity (4) opened within the mixing layer (3) for mixing linear hot-melt materials, the storage cavity (3-1) and the mixing cavity (4) being in communication; A group of guide plates (5) fixedly installed within the mixing cavity (4) for diverting and preliminarily mixing linear hot-melt materials, a discharge port being opened on each of the group of guide plates (5), and the group of guide plates (5) being staggeredly arranged; A first stirring rod (6) rotatably installed within the storage cavity (3-1) for uniformly mixing linear hot-melt materials; A nozzle (7) installed at the bottom of the housing (1) and fed through the storage cavity (3-1).

2. The binary-one color mixing nozzle assembly according to claim 1, wherein A connection cavity is opened within the housing (1), the connection cavity being located above the heating layer (2), two groups of guide wheels (8) for guiding linear hot-melt materials being rotatably provided within the connection cavity, a heating cavity (9) being provided within the heating layer (2), the heating cavity (9) being arranged in a spiral shape, and a heating wire for heating and melting linear hot-melt materials being provided within the heating cavity (9).

3. The binary-to-one color mixing nozzle assembly according to claim 2, wherein, A driving mechanism for driving the two groups of guide wheels (8) to rotate synchronously is provided within the connection cavity, the driving mechanism comprising: A group of connection gears (10) fixedly sleeved on the rotating shafts of a group of the guide wheels (8), the group of connection gears (10) being meshed with each other; A first sprocket (11) fixedly sleeved on any one of the connection gears (10), a first chain (12) being sleeved on the first sprocket (11); A motor (13) fixedly installed within the connection cavity for driving the guide wheel (8) to rotate, the output shaft of the motor (13) being fixedly connected to the rotating shaft of the guide wheel (8).

4. The one-in-two color mixing nozzle assembly according to claim 3, wherein, Mounting cavities (14) are opened on both the heating layer (2) and the mixing layer (3), the two mounting cavities (14) being in communication, a rotating rod (15) being rotatably installed within the mounting cavity (14), second sprockets (17) being fixedly sleeved on both the rotating rod (15) and the first stirring rod (6), a second chain (18) being sleeved on the second sprockets (17), and a linkage mechanism for synchronously driving the guide wheel (8) and the first stirring rod (6) to rotate being provided between the rotating rod (15) and the connection gear (10).

5. The binary-one color mixing nozzle assembly according to claim 4, characterized in that, A protective cover (16) for protecting the second sprocket (17) and the second chain (18) is fixedly installed at the top of the storage cavity (3-1), the protective cover (16) covering the second sprocket (17) and the second chain (18), and the protective cover (16) being rotatably connected to the first stirring rod (6).

6. The binary-one color mixing nozzle assembly according to claim 4, wherein, The linkage mechanism comprises: A connecting rod (20) rotatably installed within the connection cavity; One end of the connecting rod (20) being fixedly connected to the rotating shaft of the first sprocket (11); Differential conical wheels (21) respectively fixedly sleeved on the other end of the connecting rod (20) and the top end of the rotating rod (15), the two differential conical wheels (21) being meshed with each other.

7. The binary-one color mixing nozzle assembly according to claim 4, wherein, A second stirring rod (22) for improving the mixing efficiency is further arranged in the material storage cavity (3-1), and the second stirring rod (22) is horizontally and transversely arranged.

8. The binary-one color mixing nozzle assembly according to claim 7, wherein A support plate is fixedly installed in the installation cavity (14), the support plate is rotationally connected to the rotating rod (15), third sprockets (23) are arranged at the bottom end of the rotating rod (15) and on the support plate, a third chain (24) is sleeved on the third sprockets (23), and conical gears (37) are installed on the rotating shafts of the third sprockets (23) and the second stirring rod (22), and the two conical gears (37) are meshed with each other.

9. The binary-to-one color mixing nozzle assembly according to claim 1, wherein Two feeding pipes (25) for feeding linear hot-melt materials are fixedly installed at the top of the housing (1), and the feeding channel opening of the heating layer (2) is arranged in a horn shape.

10. The binary-one color mixing nozzle assembly according to claim 3, wherein Limiting wheels (19) for limiting the first chain (12), the second chain (18) and the third chain (24) are rotationally installed in the connection cavity, the installation cavity (14) and the protective cover (16), and an inclined plate (36) for guiding the linear hot-melt material is fixedly installed at the bottom of the material storage cavity (3-1).

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