A device for preventing the skewing of the discharge of a two-component packaging valve for a makeup machine and a method of using the same

Abstract

This application provides a device for preventing material misalignment in a binary packaging valve of a color mixing machine and its usage method. The device includes a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge component disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge component includes a first spring disposed between the discharge nozzle and the valve body. This device drives the discharge nozzle to approach the valve body and compress the first spring. The spring's elasticity, combined with the material's inertia, actively discharges residual material from the discharge nozzle, effectively preventing viscous material residue from adhering to the valve wall and solidifying, thus preventing material misalignment. It avoids the drawbacks of cumbersome, inefficient, and unstable manual cleaning procedures, improves the adaptability of the binary packaging valve to high-viscosity materials, and ensures the accuracy of material proportioning in the color mixing machine. It has the advantages of simple structure, high raw material utilization, convenient operation, and ease of promotion and implementation.

Description

Technical Field

[0001] This application belongs to the field of packaging technology, specifically relating to a device for preventing material skew in a binary packaging valve of a color mixing machine and its usage method. Background Technology

[0002] In the existing technology, binary packaging valves play a crucial role in the material conveying system of color mixing machines. They can accurately adapt to the quantitative conveying needs of color mixing machines for various materials, realize the on-demand output and mixing of different colored materials, and effectively improve the efficiency of color mixing operations and reduce the intensity of manual operation due to their advantages of fast filling speed, convenient use and simple operation. They are very popular among color mixing production enterprises and operators.

[0003] However, the binary packaging valves currently used in color mixing machines have some shortcomings. While conventional binary packaging valves can meet the conveying needs of ordinary free-flowing materials, they are prone to leaving residues on the valve walls when used with viscous materials commonly found in color mixing machines. Because these viscous materials gradually solidify upon contact with air, the solidified residue adheres to the outlet and cannot detach naturally. When the color mixing machine is started again for discharging, the remaining solidified material alters the normal flow trajectory, causing skewed discharge.

[0004] Furthermore, while existing technologies offer some simple cleaning solutions to address the aforementioned issue of skewed discharge, manual cleaning not only increases operational steps and reduces production efficiency, but also leads to recurring skewed discharge if cleaning is not timely or thorough. Additionally, some valves with simple anti-stick structures are only suitable for low-viscosity materials and have poor compatibility with high-viscosity dye pastes commonly used in color mixing machines. This fails to fundamentally solve the problem of skewed discharge caused by residual material solidification, thereby affecting the material proportioning accuracy of the color mixing machine and resulting in adverse consequences such as color deviation in the finished color and material waste.

[0005] Therefore, in order to comprehensively improve the discharge stability, viscous material compatibility, and color mixing operation accuracy of the binary packaging valve of the color mixing machine, it is now urgent to make improvements to solve the problem of discharge skew caused by material residue solidification in the existing technology, and improve color mixing production efficiency and product quality. Summary of the Invention

[0006] This application addresses the technical problems in existing technologies where binary packaging valves used in color mixing machines are prone to material residue sticking and solidifying on the walls when used with viscous materials, altering the material flow trajectory and causing skewed discharge; manual cleaning methods increase operational steps, reduce production efficiency, and have unstable effects; valves with simple anti-stick structures are only suitable for low-viscosity materials and have poor adaptability to high-viscosity materials, failing to fundamentally solve the problem of skewed discharge, thus affecting the material proportioning accuracy of the color mixing machine, causing color deviation in the finished product, and material waste. Therefore, this application proposes a device for preventing skewed discharge from binary packaging valves in color mixing machines.

[0007] This application adopts the following solution: a device for preventing material skew in a binary packaging valve of a color mixing machine, comprising a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge assembly disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge assembly includes a first spring disposed between the discharge nozzle and the valve body. When a user drives the discharge nozzle to move closer to the valve body, the first spring applies a spring force to the discharge nozzle to discharge any remaining material in the discharge nozzle.

[0008] In some feasible embodiments, the discharge assembly further includes a positioning assembly disposed between the discharge nozzle and the valve body. The positioning assembly includes a first boss disposed at the bottom of the discharge nozzle and a second boss disposed on the outer periphery of the valve body. One end of the first spring is sleeved on the first boss and the other end is sleeved on the second boss.

[0009] In some feasible embodiments, the positioning component further includes a first positioning groove disposed at the bottom of the second boss, wherein when the first spring is sleeved on the second boss, the bottom of the first spring is disposed in the first positioning groove.

[0010] In some feasible embodiments, the valve body includes a valve chamber disposed on the bladder assembly, a valve stem disposed on the valve chamber, and a second spring disposed between the valve stem and the valve chamber.

[0011] In some feasible embodiments, the diameter of the first spring is greater than the diameter of the second spring, and the diameter of the first spring is defined as R, and the diameter of the second spring is defined as r, wherein R and r satisfy the following relationship: 2≤R / r≤3.5.

[0012] In some feasible embodiments, the positioning component further includes a second positioning groove located at the bottom of the first boss, so that when the user drives the discharge nozzle to move closer to the valve body, the valve stem can be matched and inserted into the second positioning groove.

[0013] In some feasible embodiments, a limiting component is also provided between the discharge nozzle and the valve seat. When the first spring drives the discharge nozzle to move towards the valve seat, the discharge nozzle abuts against the valve seat through the limiting component to limit the discharge nozzle from continuing to move towards the valve seat and to discharge the material remaining in the discharge nozzle.

[0014] In some feasible embodiments, the limiting component includes a plurality of limiting grooves spaced apart around the axis of the valve seat, and a plurality of limiting plates disposed on the discharge nozzle at positions corresponding to the limiting grooves. The limiting grooves are arranged along the height direction of the valve seat, and the limiting plates are matched and disposed within the limiting grooves and can move along the length direction of the limiting grooves.

[0015] In some feasible embodiments, the plurality of the limiting grooves are arranged in a cross shape on the valve seat.

[0016] In some feasible embodiments, a reinforcing rib group is further provided between the bottom of each of the limiting plates and the first boss. The reinforcing rib group includes a horizontal reinforcing rib provided at the bottom of the limiting plate and an inclined reinforcing rib provided at the outer periphery of the first boss. The horizontal reinforcing rib and the inclined reinforcing rib are integrally formed.

[0017] Compared with the prior art, this application has the following beneficial effects: This application provides a device for preventing material misalignment in a binary packaging valve of a color mixing machine. The device includes a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge component disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge component includes a first spring disposed between the discharge nozzle and the valve body. This device drives the discharge nozzle close to the valve body to compress the first spring. The spring's elasticity, combined with the material's inertia, actively discharges residual material from the discharge nozzle, effectively preventing viscous material residue from adhering to the valve wall and solidifying, thus avoiding material misalignment. It avoids the drawbacks of cumbersome, inefficient, and unstable manual cleaning procedures, improves the adaptability of the binary packaging valve to high-viscosity materials, and ensures the accuracy of material proportioning in the color mixing machine. It has the advantages of simple structure, high raw material utilization, convenient operation, and ease of promotion and implementation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a device for preventing material skew in a binary packaging valve of a color mixing machine, as described in this application. Figure 2 This is a top view of a device for preventing material skew in a binary packaging valve of a color mixing machine, as described in this application. Figure 3 This application Figure 2 A partial sectional view at point AA in the middle; Figure 4 This application Figure 3 A magnified view of a section at point B in the middle; Figure 5 This application is in a decomposed state. Figure 2 A partial sectional view at point AA in the middle; Figure 6 This application Figure 6 A magnified view of a section at point C; Figure 7 This is a schematic diagram of the internal structure of a device for preventing material skew in a binary packaging valve of a color mixing machine, as described in this application. Figure 8 This application Figure 7 A magnified view of a section at point D; Figure 9 This is an exploded structural diagram of a device for preventing material skew in a binary packaging valve of a color mixing machine, as described in this application. Figure 10 This is a schematic diagram of the discharge nozzle of this application; Figure 11 This is a structural schematic diagram of the discharge nozzle from another perspective of this application; Figure 12 This is a schematic diagram of the valve seat structure of this application. Detailed Implementation

[0019] Combination Figures 1 to 12 The following content further illustrates the technical solution proposed in this application. This application adopts the following technical solution: a device for preventing material misalignment in a binary packaging valve of a color mixing machine, comprising a tank X, a bag assembly Y disposed within the tank X, a valve body 1 disposed on the bag assembly Y, a discharge assembly 2 disposed on the valve body 1, and a discharge assembly 4 disposed between the valve body 1 and the discharge assembly 2. The discharge assembly 2 includes a valve seat 20 disposed on the tank X and a discharge nozzle 21 disposed on the valve seat 20. The discharge assembly 4 includes a first spring 40 disposed between the discharge nozzle 21 and the valve body 1. When a user drives the discharge nozzle 21 to move closer to the valve body 1, the first spring 40 applies a spring force to the discharge nozzle 21 to discharge any remaining material inside the discharge nozzle 21.

[0020] This application provides a device for preventing material misalignment in a binary packaging valve of a color mixing machine. The device includes a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge component disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge component includes a first spring disposed between the discharge nozzle and the valve body. This device drives the discharge nozzle close to the valve body to compress the first spring. The spring's elasticity, combined with the material's inertia, actively discharges residual material from the discharge nozzle, effectively preventing viscous material residue from adhering to the valve wall and solidifying, thus avoiding material misalignment. It avoids the drawbacks of cumbersome, inefficient, and unstable manual cleaning procedures, improves the adaptability of the binary packaging valve to high-viscosity materials, and ensures the accuracy of material proportioning in the color mixing machine. It has the advantages of simple structure, high raw material utilization, convenient operation, and ease of promotion and implementation.

[0021] In this embodiment, the discharge assembly 4 further includes a positioning assembly 41 disposed between the discharge nozzle 21 and the valve body 1. The positioning assembly 41 includes a first boss 410 disposed at the bottom of the discharge nozzle 21 and a second boss 411 disposed on the outer periphery of the valve body 1. One end of the first spring 40 is sleeved on the first boss 410 and the other end is sleeved on the second boss 411.

[0022] To address the technical problems raised in this application, this application also provides a method for using a device to prevent material skew in a binary packaging valve of a color mixing machine, comprising the following steps: The discharge nozzle is assembled with the valve seat through the limiting component, so that the limiting plate is matched and embedded in the limiting groove of the valve seat; One end of the first spring is sleeved on the first protrusion at the bottom of the discharge nozzle, and the other end is sleeved on the second protrusion on the outer periphery of the valve body and inserted into the positioning groove to complete the assembly of the discharge assembly. The user drives the discharge nozzle to move closer to the valve body, compressing the first spring, and at the same time, the valve stem is matched and inserted into the second positioning groove at the bottom of the first boss; When the driving force on the discharge nozzle is released, the first spring rebounds and applies a reverse spring force to the discharge nozzle, causing the discharge nozzle to move along the limiting groove toward the valve seat. When the discharge nozzle moves to abut against the valve seat, the limiting component restricts the discharge nozzle from moving further. Under the combined action of the first spring force and the inertia of the material, the remaining material in the discharge nozzle is discharged.

[0023] In actual implementation, the assembly of the discharge nozzle and valve seat is first completed through the limiting component. The limiting plate on the discharge nozzle is embedded into the limiting groove of the valve seat, limiting the discharge nozzle to move only along the height direction of the limiting groove. Then, the two ends of the first spring are respectively sleeved on the first boss at the bottom of the discharge nozzle and the second boss on the outer periphery of the valve body. The boss structure is used to achieve precise positioning of the spring and prevent the spring from shifting during compression / rebound. At the same time, it is ensured that the valve stem of the valve body is aligned with the second positioning groove at the bottom of the first boss to guide subsequent movement.

[0024] During the discharge process, the user drives the discharge nozzle to move closer to the valve body. During this process, the first spring is compressed and stores elastic potential energy. At the same time, the valve stem is inserted into the second positioning groove to further ensure the coaxiality of the discharge nozzle movement and avoid deviation and jamming. When the user releases the driving force, the first spring releases elastic potential energy and applies a reverse elastic force to the discharge nozzle, causing the discharge nozzle to reset and move closer to the valve seat along the limiting groove. When the discharge nozzle comes into contact with the valve seat, the limiting component restricts the discharge nozzle from continuing to move. At this time, the material inside the discharge nozzle is affected by its own inertia and continues to move away from the discharge nozzle, thereby forcibly discharging the residual viscous material adhering to the inner wall of the discharge nozzle, thus preventing the residual material from sticking to the wall and solidifying from the source.

[0025] In practical implementation, this solution differs from the passive handling method of manual cleaning and the limited adaptability of simple anti-stick structures. It adopts the mechanical principle of active material discharge, utilizing the elasticity of the first spring and the inertia of the material itself to forcibly remove residual material from the discharge nozzle, completely preventing viscous material from adhering to the wall and solidifying. This design ensures a stable material flow trajectory during subsequent discharge, improves the material proportioning accuracy of the color mixing machine, and reduces finished product color deviation and material waste.

[0026] In this embodiment, the positioning component 41 further includes a first positioning groove 412 disposed at the bottom of the second boss 411. When the first spring 40 is sleeved on the second boss 411, the bottom of the first spring 40 is disposed in the first positioning groove 412.

[0027] In actual implementation, the user drives the discharge nozzle to move closer to the valve body. During this process, the first spring is compressed and stores elastic potential energy. Because the bottom of the first spring is limited by the first positioning groove, the spring will not move radially during compression, ensuring uniform compression stroke and stable elastic force storage. When the user releases the driving force on the discharge nozzle, the first spring begins to rebound and applies a reverse elastic force to the discharge nozzle, driving the discharge nozzle to reset closer to the valve seat. During the rebound, the first positioning groove continuously limits the displacement of the bottom of the spring, preventing the spring from shifting due to the rebound impact force, ensuring that the elastic force always acts in the direction of the discharge nozzle's movement, so that the discharge nozzle resets smoothly. When the discharge nozzle comes into contact with the valve seat, the limiting component restricts its continued movement. The material inside the discharge nozzle continues to maintain its original trajectory (away from the discharge nozzle) due to its own inertia, thereby forcibly discharging the residual viscous material adhering to the inner wall of the discharge nozzle, preventing residual material from adhering to the wall and solidifying from the source.

[0028] In this embodiment, the valve body 1 includes a valve chamber 10 disposed on the bag assembly Y, a valve stem 11 disposed on the valve chamber 10, and a second spring 12 disposed between the valve stem 11 and the valve chamber 10.

[0029] In this embodiment, the diameter of the first spring 40 is greater than the diameter of the second spring 12. The diameter of the first spring 40 is defined as R, and the diameter of the second spring 12 is defined as r. The relationship between R and r is: 2≤R / r≤3.5.

[0030] In actual implementation, during feeding, the user drives the valve stem to move into the valve chamber, compressing the second spring between the valve stem and the valve chamber. This opens the communication channel between the valve chamber and the bag assembly, allowing the material to pass through the valve chamber and enter the discharge nozzle of the discharge assembly, completing the material conveying process. Once feeding is complete, the user removes the external force, the second spring releases its elastic potential energy, driving the valve stem to reset and closing the communication channel, achieving precise on / off switching of material conveying. During this process, the elastic force of the second spring must match the material conveying pressure to ensure flexible valve stem opening and closing and reliable sealing.

[0031] In actual implementation, the diameter R of the first spring is greater than the diameter r of the second spring, and the condition 2≤R / r≤3.5 ensures that the first spring will not interfere with the second spring, valve stem, or other components in space.

[0032] In this embodiment, the positioning component 41 further includes a second positioning groove 413 disposed at the bottom of the first boss 410. When the user drives the discharge nozzle 21 to move closer to the valve body 1, the valve stem 11 can be matched and inserted into the second positioning groove 413.

[0033] In this embodiment, a limiting component 5 is also provided between the discharge nozzle 21 and the valve seat 20. When the first spring 40 drives the discharge nozzle 21 to move closer to the valve seat 20, the discharge nozzle 21 abuts against the valve seat 20 through the limiting component 5 to restrict the discharge nozzle 21 from moving away from the valve seat 20 and to discharge the material remaining in the discharge nozzle 21.

[0034] In this embodiment, the limiting component 5 includes a plurality of limiting grooves 50 spaced apart around the axis of the valve seat 20, and a plurality of limiting plates 51 disposed on the discharge nozzle 21 at positions corresponding to the limiting grooves 50. The limiting grooves 50 are arranged along the height direction of the valve seat 20, and the limiting plates 51 are matched and disposed within the limiting grooves 50 and can move along the length direction of the limiting grooves 50.

[0035] In this embodiment, multiple limiting grooves 50 are arranged in a cross shape on the valve seat 20.

[0036] In actual implementation, the user precisely embeds multiple limiting plates inside the discharge nozzle into the limiting grooves arranged in a cross shape on the valve seat. The limiting grooves extend along the height of the valve seat, ensuring that the limiting plates can move smoothly along the length of the groove while restricting the circumferential rotation of the discharge nozzle. Then, the discharge assembly is assembled with the valve body, and the two ends of the first spring are respectively fitted onto the first boss of the discharge nozzle and the second boss of the valve body, ensuring that the second positioning groove at the bottom of the first boss is aligned with the axis of the valve stem, so that the valve stem can be accurately inserted into the groove during subsequent movement.

[0037] In actual implementation, during the discharge process, the user drives the discharge nozzle to move closer to the valve body. During this process, on the one hand, the valve stem is precisely inserted into the second positioning groove at the bottom of the first boss, forming an axial guide structure to prevent radial deviation during the movement of the discharge nozzle; on the other hand, the limiting plate on the discharge nozzle slides synchronously along the cross-shaped limiting groove of the valve seat, further constraining the movement trajectory of the discharge nozzle and preventing circumferential torsion. The two work together to ensure smooth movement of the discharge nozzle, while compressing the first spring to store elastic potential energy.

[0038] When the driving force on the discharge nozzle is released, the first spring rebounds and applies a reverse elastic force to the discharge nozzle, causing it to reset towards the valve seat. During the reset process, the guiding engagement between the second positioning groove and the valve stem, and the sliding engagement between the limiting plate and the cross-shaped limiting groove, remain in effect, ensuring smooth axial movement of the discharge nozzle. When the discharge nozzle reaches its endpoint, the end of the limiting plate abuts against the end of the limiting groove, and the limiting component restricts the discharge nozzle from further movement. At this time, the material inside the discharge nozzle, affected by its own inertia, continues to move away from the discharge nozzle, thereby forcibly discharging the residual viscous material adhering to the inner wall of the discharge nozzle, thus preventing discharge skew caused by residual material solidifying on the wall from the source.

[0039] In actual implementation, the insertion and engagement of the second positioning groove with the valve stem forms a central guide, while the sliding engagement of the cross-shaped limiting groove with the limiting plate forms a circumferential constraint guide. Together, they constitute a dual-guide system, effectively solving problems such as radial offset and circumferential torsion that easily occur during the reciprocating movement of the discharge nozzle. Compared to a single guide structure, this system ensures that the discharge nozzle always moves smoothly along the axial direction, avoiding malfunctions such as first spring jamming and incomplete discharge caused by trajectory deviation, thus improving the reliability of the device operation.

[0040] In this embodiment, a reinforcing rib group 6 is also provided between the bottom of each limiting plate 51 and the first boss 410. The reinforcing rib group 6 includes a horizontal reinforcing rib 60 provided at the bottom of the limiting plate 51 and an inclined reinforcing rib 61 provided on the outer periphery of the first boss 410. The horizontal reinforcing rib 60 and the inclined reinforcing rib 61 are integrally formed.

[0041] In practical implementation, the horizontal reinforcing ribs directly enhance the longitudinal load-bearing strength of the limiting plate. The inclined reinforcing ribs, together with the horizontal reinforcing ribs and the first boss, form a triangular support structure, transforming the concentrated force between the limiting plate and the first boss into a distributed force. This effectively resists lateral forces and extrusion forces generated during residue removal, preventing malfunctions such as bending of the limiting plate and deformation of the first boss. Compared to structures without reinforcing ribs, the service life of the components can be significantly extended, making it particularly suitable for high-viscosity material residue removal scenarios requiring high elasticity.

[0042] This application provides a device for preventing material misalignment in a binary packaging valve of a color mixing machine and its usage method. The device includes a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge component disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge component includes a first spring disposed between the discharge nozzle and the valve body. This device drives the discharge nozzle to approach the valve body and compress the first spring. The spring's elasticity, combined with the material's inertia, actively discharges residual material from the discharge nozzle, effectively preventing viscous material residue from adhering to the valve wall and solidifying, thus preventing material misalignment. It avoids the drawbacks of cumbersome, inefficient, and unstable manual cleaning procedures, improves the adaptability of the binary packaging valve to high-viscosity materials, and ensures the accuracy of material proportioning in the color mixing machine. It has the advantages of simple structure, high raw material utilization, convenient operation, and ease of promotion and implementation.

[0043] The embodiments provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A device for preventing material skew in a binary packaging valve of a color mixing machine, characterized in that, The device includes a tank (X), a bag assembly (Y) disposed within the tank (X), a valve body (1) disposed on the bag assembly (Y), a discharge assembly (2) disposed on the valve body (1), and a discharge assembly (4) disposed between the valve body (1) and the discharge assembly (2). The discharge assembly (2) includes a valve seat (20) disposed on the tank (X) and a discharge nozzle (21) disposed on the valve seat (20). The discharge assembly (4) includes a first spring (40) disposed between the discharge nozzle (21) and the valve body (1). When the user drives the discharge nozzle (21) to move closer to the valve body (1), the first spring (40) applies a spring force to the discharge nozzle (21) to discharge the remaining material in the discharge nozzle (21).

2. The device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 1, characterized in that, The discharge assembly (4) further includes a positioning assembly (41) disposed between the discharge nozzle (21) and the valve body (1). The positioning assembly (41) includes a first boss (410) disposed at the bottom of the discharge nozzle (21) and a second boss (411) disposed on the outer periphery of the valve body (1). One end of the first spring (40) is sleeved on the first boss (410) and the other end is sleeved on the second boss (411).

3. The device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 2, characterized in that, The positioning component (41) further includes a first positioning groove (412) located at the bottom of the second boss (411). When the first spring (40) is sleeved on the second boss (411), the bottom of the first spring (40) is located in the first positioning groove (412).

4. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 2, characterized in that, The valve body (1) includes a valve chamber (10) disposed on the bag assembly (Y), a valve stem (11) disposed on the valve chamber (10), and a second spring (12) disposed between the valve stem (11) and the valve chamber (10).

5. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 4, characterized in that, The diameter of the first spring (40) is greater than the diameter of the second spring (12). The diameter of the first spring (40) is defined as R, and the diameter of the second spring (12) is defined as r. R and r satisfy the following relationship: 2≤R / r≤3.

5.

6. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 4, characterized in that, The positioning component (41) also includes a second positioning groove (413) located at the bottom of the first boss (410). When the user drives the discharge nozzle (21) to move closer to the valve body (1), the valve stem (11) can be matched and inserted into the second positioning groove (413).

7. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 2, characterized in that, It also includes a limiting component (5) disposed between the discharge nozzle (21) and the valve seat (20). When the first spring (40) drives the discharge nozzle (21) to move closer to the valve seat (20), the discharge nozzle (21) abuts against the valve seat (20) through the limiting component (5) to restrict the discharge nozzle (21) from moving away from the valve seat (20) and discharge the material remaining in the discharge nozzle (21).

8. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 7, characterized in that, The limiting component (5) includes multiple limiting grooves (50) spaced apart around the axis of the valve seat (20), and multiple limiting plates (51) located on the discharge nozzle (21) at positions corresponding to the limiting grooves (50). The limiting grooves (50) are arranged along the height direction of the valve seat (20), and the limiting plates (51) are matched and disposed in the limiting grooves (50) and can move along the length direction of the limiting grooves (50). The multiple limiting grooves (50) are arranged in a cross shape on the valve seat (20).

9. A device for preventing material skew in a binary packaging valve of a color mixing machine according to claim 8, characterized in that, It also includes a reinforcing rib group (6) disposed between the bottom of each of the limiting plates (51) and the first boss (410). The reinforcing rib group (6) includes a horizontal reinforcing rib (60) disposed at the bottom of the limiting plate (51) and an inclined reinforcing rib (61) disposed on the outer periphery of the first boss (410). The horizontal reinforcing rib (60) and the inclined reinforcing rib (61) are integrally formed.

10. A method of using a device for preventing material skew in a binary packaging valve of a color mixing machine according to any one of claims 1 to 9, characterized in that, Includes the following steps: The discharge nozzle is assembled with the valve seat through the limiting component, so that the limiting plate is matched and embedded in the limiting groove of the valve seat; One end of the first spring is sleeved on the first protrusion at the bottom of the discharge nozzle, and the other end is sleeved on the second protrusion on the outer periphery of the valve body and inserted into the positioning groove to complete the assembly of the discharge assembly. The user drives the discharge nozzle to move closer to the valve body, compressing the first spring, and at the same time, the valve stem is matched and inserted into the second positioning groove at the bottom of the first boss; When the driving force on the discharge nozzle is released, the first spring rebounds and applies a reverse spring force to the discharge nozzle, causing the discharge nozzle to move along the limiting groove toward the valve seat. When the discharge nozzle moves to abut against the valve seat, the limiting component restricts the discharge nozzle from moving further. Under the combined action of the first spring force and the inertia of the material, the remaining material in the discharge nozzle is discharged.

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