Gas mixing and wax injection valve
By designing a gas-mixing wax injection valve, the problems of uneven mixing, poor sealing, and difficult maintenance in traditional wax injection valves have been solved, achieving uniform wax spraying and stable equipment operation, thereby improving production efficiency and finished product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU TAIBEN AUTOMATION EQUIPMENT CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional wax injection valves cannot effectively mix gas with other materials, resulting in poor wax injection effect, insufficient wax filling, poor sealing, easy leakage, non-removable valve structure, and difficult maintenance after nozzle blockage, which affects production efficiency and finished product quality.
A gas-mixing wax injection valve was designed, which adopts a gas-mixing chamber structure, a guide block with an overflow groove, a detachable nozzle, and a precision valve needle pneumatic control and sealing system to achieve full mixing of wax and gas, ensure sealing, and prevent wax leakage and pressure overload through the synergistic effect of the overflow groove and sealing ring. The nozzle is detachable for easy maintenance.
It improves coating quality and production efficiency, ensures uniform atomization and equipment reliability, extends equipment lifespan, and reduces maintenance costs.
Smart Images
Figure CN224443356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve bodies, and more particularly to a gas-gas injection valve. Background Technology
[0002] Waxing is widely used in industrial production, such as in vehicle chassis painting. Traditional wax injection valves have some limitations, such as the inability to effectively mix gas with other materials during the waxing process, resulting in poor waxing effect, insufficient wax filling, poor sealing, easy wax leakage, non-removable valve structure, and difficult maintenance after nozzle blockage, which affect production efficiency and finished product quality. Utility Model Content
[0003] In view of the above, this utility model provides a gas-mixed wax injection valve. The gas-mixed wax injection valve effectively solves the problems of atomization uniformity, residual clogging, response speed and maintenance convenience of wax spraying through the gas mixing chamber structure, guide block design with overflow groove, detachable nozzle and precision valve needle pneumatic control and sealing system. Its design significantly improves spraying quality, production efficiency and equipment reliability.
[0004] The present invention specifically adopts the following technical solution: a gas-injection wax valve, comprising a valve body and a nozzle, one end of the valve body being an end cap and the other end being an injection head, the nozzle being detachably disposed at one end of the injection head, the valve body wall being provided with an air inlet, an injection port, a gas-injection port, and an overflow port, the valve body being provided with an air chamber, a material chamber, and a gas-injection port, a wax outlet being provided between the material chamber and the gas-injection port, a guide block being provided between the air chamber and the material chamber, a valve needle being slidably disposed within the valve body passing through the air chamber, the guide block, and the material chamber, an overflow groove being provided in the middle of the guide block, the overflow groove being connected to the overflow port, the air inlet being connected to the air chamber, the injection port being connected to the material chamber, and the gas-injection port being connected to the gas-injection port.
[0005] As a further improved technical solution, a first sealing ring and a second sealing ring are respectively provided between the valve needle and the guide block on both sides of the overflow groove, and a third sealing ring is provided between the guide block and the inner wall of the valve body.
[0006] As a further improved technical solution, the nozzle includes a fixing part and a spraying part. The spraying part is cylindrical and has spray holes. The nozzle is connected to the wax injection head through the fixing part.
[0007] As a further improved technical solution, the nozzle is provided with a funnel cavity and a spray channel inside. The funnel cavity is connected to the mixing chamber and is located inside the fixed part. The spray channel is connected to the funnel cavity and passes through the fixed part and the spraying part.
[0008] As a further improved technical solution, the wax outlet is opened in the middle of the wax nozzle, and the needle tip of the valve needle slides and extends within the wax outlet to control the opening and closing of the wax outlet.
[0009] As a further improved technical solution, the flat end of the valve needle is provided with a piston, and a butterfly spring is provided between the piston and the inner wall of the end cap. The piston and the butterfly spring are movably disposed in the air chamber.
[0010] As a further improved technical solution, a fourth sealing ring is provided between the piston and the inner wall of the gas chamber.
[0011] As a further improved technical solution, a check valve is provided at the mixing port.
[0012] As a further improved technical solution, the fixing part is provided with an external thread, and the inner wall of the wax injection head is provided with an internal thread, and the external thread of the fixing part is connected with the internal thread.
[0013] The gas-fuel mixing valve of this invention has the following advantages compared with the prior art:
[0014] Precise wax injection: The extension and sliding of the valve needle can precisely control the opening and closing of the wax outlet. The valve needle opening is adjusted according to the gas pressure to achieve precise control of the wax flow rate, meet the wax injection requirements of different processes, and improve product quality consistency.
[0015] Uniform gas mixing: The wax liquid is fully mixed with the gas in the material cavity, which can quickly fill the complex shaped cavity when injected into the mold, reducing defects such as air holes and shrinkage in the wax parts, and improving the quality of wax parts and molding efficiency.
[0016] Reliable sealing: The design of multiple sealing rings, such as the first and second sealing rings to ensure the seal between the valve needle and the guide block, the third sealing ring to enhance the seal between the guide block and the inner wall of the valve body, and the fourth sealing ring to ensure the seal between the piston and the gas chamber, effectively prevents the leakage of wax and gas, reduces maintenance costs, and ensures production continuity.
[0017] Reasonable structure and easy disassembly: The nozzle is connected to the wax injection head by a thread, which is convenient for disassembly, cleaning or replacement, and daily maintenance is convenient; the overall valve body has a reasonable layout, with each chamber being independent yet closely coordinated, which is conducive to large-scale production and application.
[0018] Pressure balancing and protection: When the pressure of the wax liquid in the material chamber is too high, the wax liquid can flow through the overflow groove to the overflow port and be discharged, thereby balancing the pressure in the material chamber and avoiding damage to the valve body or affecting the wax injection accuracy due to excessive pressure. This plays a role in protecting the valve body and ensuring the stability of the wax injection process.
[0019] Residual wax removal and anti-clogging: When the valve needle moves within the valve body, it can push the residual wax on the material chamber side into the overflow groove and discharge it through the overflow port, effectively preventing the residual wax from solidifying and clogging in the material chamber, ensuring the normal operation of the wax injection valve and the quality of wax injection, and extending the service life of the equipment. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of the gas-mixing wax injection valve of this application.
[0021] Figure 2 This is a schematic diagram of the back of the gas-mixing wax injection valve in this application.
[0022] Figure 3 for Figure 2 Directional section view. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up" and "connection" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.
[0025] Reference Figures 1-3 This embodiment provides a gas-mixed wax injection valve, including a valve body 1 and a nozzle 2. One end of the valve body 1 is an end cap 11, and the other end is a wax injection head 12. The nozzle 2 is screw-on and detachably located at one end of the wax injection head 12. The valve body 1 has an air inlet 13, a wax injection port 14, a gas mixing port 15, and an overflow port 16. The valve body 1 has an air chamber 17, a material chamber 18, and a gas mixing chamber 19. A wax outlet 3 is provided between the material chamber 18 and the gas mixing chamber 19. A guide block 4 is provided between the air chamber 17 and the material chamber 18. A valve needle 5 is slidably provided inside the valve body 1, passing through the air chamber 17, the guide block 4, and the material chamber 18. An overflow groove 41 is provided in the middle of the guide block 4. The overflow groove 41 is connected to the overflow port 16. The air inlet 13 is connected to the air chamber 17. The wax injection port 14 is connected to the material chamber 18. The gas mixing port 15 is connected to the gas mixing chamber 19.
[0026] Specifically, on both sides of the overflow groove 41, a first sealing ring 51 and a second sealing ring 52 are respectively provided between the valve needle 5 and the guide block 4, and a third sealing ring 42 is provided between the guide block 4 and the inner wall of the valve body 1. A wax outlet 31 is opened in the middle of the wax outlet nozzle 3, and the needle tip of the valve needle 5 slides and extends within the wax outlet nozzle 3 to control the opening and closing of the wax outlet 31. A piston 6 is provided at the flat end of the valve needle 5, and a butterfly spring 7 is provided between the piston 6 and the inner wall of the end cap 11. The piston 6 and the butterfly spring 7 are movably located within the air chamber 17, and a fourth sealing ring 61 is provided between the piston 6 and the inner wall of the air chamber 17. A check valve 151 is connected to the mixing port 15 to prevent wax or impurities from entering the mixing pipe in reverse. The first sealing ring 51, the second sealing ring 52, the third sealing ring 42, and the fourth sealing ring 61 are made of high-temperature resistant fluororubber or silicone.
[0027] The overflow system achieves dual functions through the coordinated design of guide block overflow groove + overflow port + sealing ring: 1. Active dynamic residual removal: When the valve needle 5 moves, it forcibly removes residual wax. When the valve needle 5 opens and closes, it is triggered, and the movement of the valve needle 5 pushes the surface wax film. The first sealing ring 51 scrapes off the wax layer, and the residual wax enters the overflow groove 41 for discharge; 2. Passive overpressure protection: When the system is overpressured, it automatically releases pressure for protection. The sealing rings on both sides of the overflow groove 41 ensure that the overflow groove will not leak wax during normal operation. However, if the wax pressure in the material chamber 18 is too high... If the pressure exceeds the set threshold, the passive overpressure protection is activated. The high-pressure wax liquid squeezes the first sealing ring, forming a temporary pressure relief channel. The wax liquid is forced to flow through the overflow groove 41 of the guide block 4. The overflow groove 41 is connected to the overflow port 16. The wax liquid is discharged from the valve body through the overflow port 16. This overflow protection mechanism effectively prevents the valve body from being damaged or the wax injection accuracy from decreasing due to excessive pressure, ensuring the stable operation of the wax injection valve and the wax injection quality. The overflow function activation pressure is higher than the maximum working pressure, such as 1.2 to 1.5 times the rated pressure, but lower than the valve body pressure resistance limit.
[0028] Furthermore, the nozzle 2 includes a fixing part 21 and a spraying part 22. The spraying part 22 is cylindrical and has spray holes 221. The nozzle 2 is connected to the wax injection head 12 through the fixing part 21. The fixing part 21 has external threads, and the inner wall of the wax injection head 12 has internal threads. The external threads of the fixing part 21 and the internal threads of the wax injection head 12 are engaged and connected. The nozzle 2 has a funnel cavity 23 and a spraying channel 24 inside. The funnel cavity 23 is connected to the mixing chamber 19 and is located inside the fixing part 21. The spraying channel 24 communicates with the funnel cavity 23 and passes through the fixing part 21 and the spraying part 22.
[0029] Work process:
[0030] Initially, there is no pressure in the air chamber 17 and the material chamber 18. Under the action of the butterfly spring 7, the valve needle 5 extends its tip into the wax outlet 31 of the wax nozzle 3, blocking and closing the outlet 31, preventing the wax from flowing out. If liquid wax enters the material chamber 18 from the wax injection port 14, it cannot flow out because the outlet 31 is closed. Gas enters the air chamber 17 from the air inlet 13. As the gas pressure increases, it pushes the piston 6 to overcome the elastic force of the butterfly spring 7 and move towards the end cap 11, causing the valve needle 5 to slide as a whole. The valve needle 5 gradually disengages from the outlet 31 of the wax nozzle 3. The wax flows into the material chamber 18 from the wax injection port 14, while gas also enters the mixing chamber 19 through the mixing port 15. The wax in the material chamber 18, aided by gas pressure and its own gravity, flows out through the outlet 31 of the wax nozzle 3 into the mixing chamber 19. During this process, the wax and the gas in the mixing chamber 19 are further mixed, forming a uniform mixed wax flow. The mixed wax liquid is gathered into the spray channel 24 through the funnel cavity 23 inside the nozzle 2. Finally, the mixture is sprayed out at high speed through the spray hole 221 on the spray section 22 to form a highly atomized wax mist, which is evenly sprayed onto the surface of the target mold cavity to complete the wax injection operation. When the wax injection is completed, the air intake is stopped, the butterfly spring 7 pushes the piston 6 and the valve needle 5 to reset, and the tip of the valve needle 5 reseals the wax outlet 31 to prevent the wax liquid from flowing back or leaking.
[0031] Furthermore, the above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.
Claims
1. A gas-mixing and wax-injection valve, characterized by: The device includes a valve body and a nozzle. One end of the valve body is an end cap, and the other end is a wax injection head. The nozzle is detachably located at one end of the wax injection head. The valve body wall has an air inlet, a wax injection port, a gas mixing port, and an overflow port. The valve body has an air chamber, a material chamber, and a gas mixing chamber. A wax outlet is provided between the material chamber and the gas mixing chamber. A guide block is provided between the air chamber and the material chamber. A valve needle is slidably provided in the valve body through the air chamber, the guide block, and the material chamber. An overflow groove is provided in the middle of the guide block. The overflow groove communicates with the overflow port. The air inlet communicates with the air chamber. The wax injection port communicates with the material chamber. The gas mixing port communicates with the gas mixing chamber.
2. The gas-mixing and wax-injection valve according to claim 1, characterized in that: On both sides of the overflow groove, a first sealing ring and a second sealing ring are respectively provided between the valve needle and the guide block, and a third sealing ring is provided between the guide block and the inner wall of the valve body.
3. The gas-mixing and wax-injection valve according to claim 1, characterized in that: The nozzle includes a fixing part and a spraying part. The spraying part is cylindrical and has spray holes. The nozzle is connected to the wax injection head through the fixing part.
4. The gas-fuel mixing valve according to claim 3, characterized in that: The nozzle has a funnel cavity and a spray channel inside. The funnel cavity is connected to the mixing chamber and is located inside the fixed part. The spray channel is connected to the funnel cavity and passes through the fixed part and the spraying part.
5. The gas-mixing and wax-injection valve according to claim 1, characterized in that: The wax outlet has a wax outlet in the middle, and the tip of the valve needle slides and extends within the wax outlet to control the opening and closing of the wax outlet.
6. The gas-mixing and wax-injection valve according to claim 1, characterized in that: The valve needle has a piston at its flat end, and a butterfly spring is provided between the piston and the inner wall of the end cap. The piston and the butterfly spring are movably disposed within the air chamber.
7. The gas-mixing and wax-injection valve according to claim 6, characterized in that: A fourth sealing ring is provided between the piston and the inner wall of the gas chamber.
8. The gas-mixing and wax injecting valve according to claim 1, wherein: A check valve is installed at the gas mixing port.
9. The gas-mixing and wax-injection valve according to claim 3, characterized in that: The fixing part is provided with an external thread, and the inner wall of the wax injection head is provided with an internal thread. The external thread of the fixing part is connected to the internal thread.