Turbulent flow piston structure for polyurethane foaming gun
By employing a spiral turbulence channel and tilted piston design in the polyurethane foam gun, and integrating a heating system, the problems of uneven mixing of polyurethane raw materials and temperature control were solved, achieving higher quality and more efficient production of polyurethane foam.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional polyurethane foaming machines suffer from uneven mixing when mixing polyurethane A and B raw materials, and the discharge temperature is easily affected by external factors, making it difficult to meet the production requirements of high quality and high efficiency.
The spiral turbulence groove design incorporates a turbulence piston structure, combined with an inclined piston and slope design, and integrates a heating system. The spiral turbulence groove changes the flow path of the original liquid, extends the residence time, and achieves multiple collision mixing. The heating rod controls the temperature to ensure the uniformity and stability of the mixing.
It improves the mixing uniformity and temperature control capability of polyurethane raw materials, ensuring the stability and efficiency of polyurethane foam production, and enhancing production quality and efficiency.
Smart Images
Figure CN224224357U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of polyurethane foam production equipment, and provides a turbulence piston structure for a polyurethane foam gun. Background Technology
[0002] A polyurethane foaming machine is a specialized piece of equipment for the injection and foaming of polyurethane foam plastics. As long as the performance indicators of the polyurethane components meet the formulation requirements, this equipment can produce uniform and qualified foam products. Polyurethane foaming machines can be used in automotive interiors, thermal insulation wall coating, thermal insulation pipe manufacturing, and the processing of bicycle and motorcycle seat foam, among other applications.
[0003] As one of the production equipment for polyurethane foam materials, the performance level and technical specifications of polyurethane high-pressure foaming machines determine the overall level of this type of equipment. However, conventional polyurethane foaming machine spray guns have certain limitations in the mixing process of polyurethane A and B raw materials. Traditional mixing methods are often simple and direct, resulting in uneven mixing and unsatisfactory mixing effects. Furthermore, the discharge temperature is easily affected by external factors, making it difficult to meet the growing demands for high-quality and high-efficiency production. This situation urgently requires a new technical solution to overcome existing bottlenecks and achieve better performance. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a turbulence piston structure for a polyurethane foam gun to solve the problem of uneven mixing of polyurethane raw materials, thereby improving the quality and effect of mixing.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] This utility model provides a turbulence piston structure for a polyurethane foam gun. The turbulence piston consists of a piston and a valve seat. The piston is mounted on the valve seat, and the piston rod extends out of the valve seat. One end of the piston has a positioning pin hole, and the valve seat has a mounting pin hole corresponding to the positioning pin hole on the piston. The mounting pin hole and the positioning pin hole are connected by a pin, with the pin tightly fitted to the mounting pin hole and slidably fitted to the positioning pin hole. The piston has a sealing ring groove, and the valve seat has an oil inlet and an oil outlet located on both sides of the sealing ring groove on the piston. The piston rod has a spiral turbulence groove at its free end away from the valve seat. Using this design, multiple spiral turbulence grooves are provided on the outer surface of the cylindrical piston. When polyurethane raw materials A and B flow through the gun body, the turbulence grooves of the turbulence piston can effectively disperse the flow state of the raw materials, making the mixing of raw materials A and B more uniform and improving the quality and effect of mixing.
[0007] Optionally, the piston of the turbulence piston extends and retracts in an upwardly inclined manner within the mixing chamber of the polyurethane foam gun body, and the end face of the free end of the piston rod is provided with an inclined surface adapted to the vertical direction of the mixing chamber according to its inclination angle. This design can further optimize the mixing process, better guide the flow direction of the raw liquid, and improve the uniformity and quality of the mixture.
[0008] Optionally, it also includes a heating rod, a wire, and a stopper cap. The piston has an internal channel extending axially to the free end of the rod. The valve seat has a threaded mounting hole that matches the stopper cap. The heating rod is located at the top of the internal channel. The wire passes through the stopper cap and the internal channel sequentially before connecting to the heating rod. Both the piston and the stopper cap have plugs that mate with the wire. This design enables heating during the mixing and discharging of the raw liquid, helping the raw liquid to mix better and reach the required temperature, improving mixing efficiency and stability. Simultaneously, the heating process of the heating rod reduces the resistance of the raw liquid during flow, and combined with the piston's spiral turbulence channel structure, it further improves work efficiency, ensures stability and quality during production, and provides more functionality and convenience for the use of polyurethane foam guns.
[0009] The beneficial effects of this utility model are:
[0010] The turbulence piston structure for polyurethane foam gun mentioned in this utility model plays an important role in the polyurethane foam gun through its spiral turbulence groove design. It not only enhances the turbulence effect on the raw liquid and prolongs the residence time of the raw liquid in the mixing chamber, but also changes the flow path of polyurethane A and B raw liquids in the mixing chamber of the gun body. This allows them to undergo multiple collisions and thorough mixing, achieving a more uniform and thorough mixing effect of the polyurethane foam raw liquid, and ensuring a more stable and reliable production process for polyurethane foam.
[0011] In summary, the turbulence piston structure for the polyurethane foam gun described in this invention effectively solves the problem of uneven mixing in traditional mixing methods, and helps improve production efficiency and product quality. This innovative foam gun structure will play an important role in the production process of polyurethane foam, bringing a better production experience and results to the industry.
[0012] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:
[0014] Figure 1 This is an exploded view of the turbulence piston structure for the polyurethane foam gun of this utility model;
[0015] Figure 2 for Figure 1 A cross-sectional view of the piston in the diagram;
[0016] Figure 3 This is a front view of the application of the turbulence piston structure for the polyurethane foam gun of this utility model;
[0017] Figure 4 for Figure 3 AA section view diagram;
[0018] Reference numerals: Piston 1, Valve seat 2, Plug cap 3, Wire 4, Heating rod 5; Spiral turbulence groove 11, Positioning pin hole 12, Inner channel 13, Inclined surface 14, Sealing ring groove 15, Plug 16; Threaded mounting hole 21, Mounting pin hole 22, Oil inlet 23, Oil outlet 24; Gun body 100, Polyurethane A raw material nozzle 200, Polyurethane B raw material nozzle 300, Mixing chamber 400, Turbulence piston 500. Detailed Implementation
[0019] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0020] like Figure 1-4As shown, this utility model discloses a turbulence piston structure for a polyurethane foam gun, comprising a piston 1 and a valve seat 2, which can achieve a flow-blocking function. The piston 1 is mounted on the valve seat 2, and the rod of the piston 1 extends outside the valve seat 2. One end of the piston 1 is provided with a positioning pin hole 12 corresponding to the valve seat 2, and the valve seat 2 is also provided with a mounting pin hole 22 corresponding to the positioning pin hole 12. The positioning pin hole 12 and the mounting pin hole 22 are connected by a pin for positioning, with the pin tightly fitted to the mounting pin hole 22 and slidingly fitted to the positioning pin hole 12. This allows the piston 1 and the valve seat 2 to only move relative to each other without rotation, thus keeping the movement of the piston 1 relatively stable and enabling the piston 1 to work stably on the valve seat 2. The piston 1 is also provided with… There is a sealing ring groove 15 for assembling O-ring seals, and the valve seat 2 is provided with an oil inlet 23 and an oil outlet 24 on both sides of the sealing ring groove 15, which are connected to the two sides of the piston 1, so as to drive the piston 1 to move in the valve seat 2; the free end of the piston 1 rod is designed with a spiral turbulence groove 11 to facilitate stirring of the raw liquid. It not only enhances the turbulence effect on the raw liquid and prolongs the residence time of the raw liquid in the mixing chamber 400 of the gun body 100 of the polyurethane foam gun, but also changes the flow path of polyurethane A and B raw liquid sprayed from the polyurethane A raw liquid nozzle 200 and the polyurethane B raw liquid nozzle 300 in the mixing chamber 400 of the gun body 100, so that after multiple collisions and full mixing, the polyurethane foam raw liquid achieves a more uniform and full mixing effect, ensuring that the production process of polyurethane foam plastic is more stable and reliable.
[0021] In this embodiment, the piston 1 is mounted on the valve body 2 in an upwardly inclined manner. Specifically, the piston 1 moves relative to the valve seat 2 at an upward angle, hence the term "upwardly inclined piston structure." This arrangement allows the piston rod to penetrate as deeply as possible into the mixing chamber 400 of the gun body 100, facilitating thorough agitation of the raw liquid by the spiral turbulence groove 11 on the piston rod. This further optimizes the mixing process, better guides the flow direction of the raw liquid, and improves the uniformity and quality of the mixture. Furthermore, the free end face of the piston rod is provided with an inclined surface 14 that is adapted to the vertical orientation of the mixing chamber 400, based on its inclination angle.
[0022] In this embodiment, a heating function can also be added to meet different temperature requirements. To this end, this solution proposes a heated turbulence piston structure, which is composed of a cap 3, a heating rod 5, and a lead wire 4, etc., added to the previous structure. The piston 1 maintains its upward-sloping shape as described above, and has a through hole (inner channel 13) at its bottom. The top of the inner channel 13 is used to place the heating rod 5. A threaded mounting hole 21 is machined on the valve body 2 for mounting the cap 3. The lead wire 4 passes through the cap 3 and the inner channel 13 and connects to the heating rod 5. Thus, the heating rod 5, lead wire 4, and cap 3 effectively control the temperature of the raw liquid mixing, ensuring stability and quality during production. This integrated design not only improves the mixing effect but also enhances production controllability and efficiency, providing more functionality and convenience for the use of polyurethane foam guns. Both the piston 1 and the cap 3 are equipped with a sealing plug 16 that cooperates with the lead wire 4 to ensure the sealing of the turbulence piston.
[0023] During use, the mixing chamber 400 of the gun body 100 receives and mixes polyurethane A and B raw materials sprayed from the polyurethane A raw material nozzle 200 and the polyurethane B raw material nozzle 300, respectively. Through the agitation of the turbulence piston 500 and the use of the spiral turbulence groove 11 on the piston rod, the turbulence effect on the raw materials is enhanced, prolonging the residence time of the raw materials in the mixing chamber. Furthermore, the flow path of polyurethane A and B raw materials within the gun body's mixing chamber is altered. Specifically, the piston's extension and retraction, combined with the spiral turbulence groove, causes the raw materials to be carried up and agitated, resulting in multiple collisions and thorough mixing. This achieves a more uniform and complete mixing effect of the polyurethane foam raw materials, ensuring a more stable and reliable polyurethane foam production process. Simultaneously, the auxiliary heating process of the heating rod 5 reduces the resistance of the raw materials during flow, and, combined with the spiral turbulence groove structure of the piston, further improves work efficiency, ensuring stability and quality during production, and providing more functionality and convenience for the use of the polyurethane foam gun.
[0024] The inventive technical features of this utility model are as follows:
[0025] 1. Spiral turbulence groove structure. A spiral turbulence groove is provided at the free end of the piston rod, resulting in the following technical effects: effectively dispersing the flow state of the raw materials, making the mixing of raw materials A and B more uniform; extending the residence time of the raw materials in the mixing chamber; and changing the flow path of the raw materials, achieving multiple collisions and thorough mixing. Thus, unlike traditional simple mixing methods, this spiral structure achieves fluid dynamics optimization through a specific geometry, thereby solving the problem of uneven mixing mentioned in the background art, and is adopted in the field of polyurethane foaming.
[0026] 2. Inclined Piston and Angled Surface Design. The piston extends and retracts within the mixing chamber at an upward angle, while the free end of the piston features an angled surface adapted to the vertical orientation of the mixing chamber. This design optimizes the mixing process, better guides the flow direction of the raw liquid, and improves the uniformity and quality of the mixture. This asymmetrical design breaks away from the traditional linear piston movement, and the angled surface design achieves optimized coordination with the mixing chamber, thus solving the problem of uneven fluid distribution in traditional mixing chambers.
[0027] 3. Integrated Heating System. The piston has an internal channel with a heating rod located at the top. A wire connects to the heating rod via a cap and the internal channel. This design achieves the following technical benefits: heating during the mixing and discharging of the raw liquid, reducing flow resistance, and improving mixing efficiency and stability. Integrating the heating system into the piston structure solves the temperature control problem, and the innovative internal channel design achieves a perfect combination of heating function and piston structure. The sealing design ensures airtightness and does not affect piston movement.
[0028] In summary, this utility model, "turbulence piston structure for polyurethane foam gun," effectively solves the technical problems of uneven mixing and temperature control of polyurethane raw materials through an innovative combination of technical features such as spiral turbulence grooves, tilted piston design, and integrated heating system.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A turbulence-inducing piston structure for a polyurethane foam gun, characterized in that, A turbulence piston (500) is composed of a piston (1) and a valve seat (2). The piston (1) is mounted on the valve seat (2), and the rod of the piston (1) extends out of the valve seat (2). One end of the piston (1) is provided with a positioning pin hole (12). The valve seat (2) is provided with an installation pin hole (22) corresponding to the positioning pin hole (12) on the piston (1). The installation pin hole (22) and the positioning pin hole (12) are connected by a pin. The pin is tightly fitted with the installation pin hole (22) and the pin is slidably fitted with the positioning pin hole (12). The piston (1) is provided with a sealing ring groove (15). The valve seat (2) is provided with an oil inlet (23) and an oil outlet (24) on both sides of the sealing ring groove (15) of the piston (1). The rod of the piston (1) is provided with a spiral turbulence groove (11) at the free end away from the valve seat (2).
2. The turbulence piston structure for a polyurethane foam gun according to claim 1, characterized in that, The piston (1) of the turbulence piston (500) extends and retracts in an upwardly inclined manner within the mixing chamber (400) of the gun body (100) of the polyurethane foam gun, and the end face of the free end of the piston (1) is provided with an inclined surface (14) adapted to the vertical of the mixing chamber (400) according to its inclination angle.
3. The turbulence piston structure for a polyurethane foam gun according to claim 1 or 2, characterized in that, It also includes a heating rod (5), a wire (4) and a plug (3). The piston (1) is provided with an inner channel (13) extending to the free end of the rod body in the axial direction. The valve seat (2) is provided with a threaded mounting hole (21) that matches the plug (3). The heating rod (5) is located at the top of the inner channel (13). The wire (4) passes through the plug (3) and the inner channel (13) in sequence and is connected to the heating rod (5). Both the piston (1) and the plug (3) are provided with a plug (16) that matches the wire (4).