A mixing device for processing memory foam foaming raw materials

Abstract

The present application relates to the technical field of memory cotton production, and particularly relates to a mixing equipment for processing memory cotton foaming raw materials. The present application aims to provide a mixing equipment for processing memory cotton foaming raw materials, which can realize efficient, uniform and multi-stage mixing, can perform efficient and complete self-cleaning, and can guarantee production continuity and stability. The mixing equipment for processing memory cotton foaming raw materials comprises a rack, at least two groups of raw material tanks arranged on the rack, a metering system communicated with the raw material tanks, a high-pressure mixing head communicated with the metering system, and a control system. The mixing head comprises mixing components and discharge components which are connected with each other. The mixing components are provided with mixing cavities in the centers. The discharge components are provided with discharge cavities in the centers. The discharge cavities are communicated with the mixing cavities, and the discharge cavities are perpendicular to the mixing cavities. The present application can realize efficient, uniform and multi-stage mixing, can perform efficient and complete self-cleaning, and can guarantee production continuity and stability.

Description

Technical Field

[0001] This invention relates to the field of memory foam production technology, and in particular to a mixing device for processing memory foam foam raw materials. Background Technology

[0002] Memory foam, a type of polyurethane foam with slow rebound properties, largely depends on the uniformity and precision of the foaming raw materials during the mixing stage. In the production process, two or more high-viscosity liquid raw materials need to be thoroughly and uniformly mixed within a very short time, and then rapidly injected into a mold for the foaming reaction. This crucial mixing process is typically completed by a high-pressure foaming machine, whose core component is the high-pressure mixing head.

[0003] Currently, the working principle of mainstream high-pressure mixing heads relies on the opposing jets and high-speed collisions of various raw materials under high pressure to achieve initial mixing. However, relying solely on a single frontal collision mixing method often fails to achieve optimal uniform dispersion when dealing with high-viscosity or complex formulations of raw materials. To improve mixing quality, some improved solutions have added static mixers or turbulence structures inside the mixing chamber. However, these internal components also bring new problems: the complex mixer or groove structure limits the operating space for mechanical scraping and cleaning, resulting in a small amount of solidified material that has already begun to react easily remaining after each mixing. The gradual accumulation of residues not only contaminates subsequent batches of raw materials, causing product defects, but may also clog the mixing head, seriously affecting the continuous operation stability of the equipment. Therefore, in actual production, cleaning is usually required by solvent rinsing. However, this method not only has limited cleaning effect but also involves the use of chemical solvents, which is not environmentally friendly. Therefore, there is an urgent need to develop a mixing equipment for memory foam foam raw material processing that can achieve efficient and uniform multi-stage mixing, while also performing efficient and thorough self-cleaning to ensure production continuity and stability. Summary of the Invention

[0004] In order to overcome the shortcomings of existing high-pressure mixing heads, such as poor mixing effect, insufficient self-cleaning ability, poor production continuity, and insufficient operational stability, this invention aims to provide a mixing device for processing memory foam foam raw materials that can achieve efficient and uniform multi-stage mixing, while also performing efficient and thorough self-cleaning, thus ensuring production continuity and stability.

[0005] This invention is achieved through the following specific technical means:

[0006] A mixing device for processing memory foam foam raw materials includes a frame, at least two sets of material tanks mounted on the frame for storing the foaming raw materials, a metering system connected to the material tanks, a high-pressure mixing head connected to the metering system, and a control system. The mixing head includes a mixing component and a discharge component connected to each other. The mixing component has a mixing chamber penetrating through it at its center. The discharge component has a discharge chamber penetrating through it at its center. The discharge chamber is connected to the mixing chamber and is perpendicular to it. The mixing component has two oppositely arranged feed ports and two return ports. The feed ports and return ports are connected to the mixing chamber.

[0007] Both the mixing component and the discharge component are equipped with telescopic components at their rear sides. The telescopic components are cylinder structures, including a cylinder body, a piston, and a telescopic rod. The telescopic rods extend into the mixing chamber and the discharge chamber, respectively. The operation of the mixing head is controlled by the axial advancement and retraction of the telescopic rods, while cleaning the mixing chamber and the discharge chamber. A return groove is provided on the telescopic rods extending into the mixing chamber, which is used to connect the feed port and the return port when the mixing chamber is closed to form a liquid circulation.

[0008] The telescopic assembly also includes a guide mechanism, which includes a guide hole located at the rear end of the piston and a guide post located inside the cylinder that mates with the guide hole. Guide sliders protrude from opposite sides of the outer diameter surface of the guide post near the piston. A guide groove that mates with the guide slider is provided inside the guide hole, and the guide groove is a spiral guide groove that surrounds the inner diameter surface of the guide hole. This allows the piston to slide axially while rotating circumferentially, thereby driving the telescopic rod to perform axial movement and small-angle reciprocating rotation.

[0009] The ends of the telescopic rods in the mixing chamber and the discharge chamber are provided with mating grooves, which are helical mating grooves arranged around the outer diameter surface of the telescopic rods. Helical turbulence protrusions that mate with the mating grooves on the telescopic rods are fixedly arranged on the inner diameter surfaces of the mixing chamber and the discharge chamber, respectively. When the telescopic rod is retracted, the helical turbulence protrusions remain in the mixing chamber and the discharge chamber to turbulently and rotate the mixture. When the telescopic rod is extended, the helical turbulence protrusions engage with the mating grooves to clean the residual liquid adhering to the surface of the helical turbulence protrusions.

[0010] Furthermore, at least two protruding guide sliders are provided on the guide post, and they are evenly distributed circumferentially around the outer diameter surface of the guide post; the corresponding guide holes are also provided with the same number of guide grooves that cooperate with the guide sliders; the multi-point cooperation improves the guiding stability and motion accuracy, balances the force to reduce local wear, and enhances the smoothness of rotational motion.

[0011] Furthermore, at least two mating grooves are provided on the telescopic rods in the mixing chamber and the discharge chamber, and the mating grooves are evenly distributed circumferentially around the outer diameter surface of the telescopic rods; the same number of spiral turbulence protrusions that mate with the mating grooves are also provided in the corresponding mixing chamber and discharge chamber; the uniformity of material rotation and mixing is enhanced by multi-point synergy, the thoroughness of scraping the protrusions during cleaning is improved, and the force is balanced to reduce local wear and ensure motion stability.

[0012] Furthermore, the mating groove on the telescopic rod inside the mixing cavity is staggered from the return groove on it to avoid structural interference between the two during the movement of the telescopic rod.

[0013] Furthermore, the axial length of the spiral turbulence protrusion is longer than the axial movement distance of the telescopic rod; this ensures that the spiral turbulence protrusion, located near the telescopic assembly end, always maintains a sliding fit with the inner wall of the mating groove; preventing the spiral turbulence protrusion from detaching from the mating groove and enhancing structural stability; and simultaneously preventing material from flowing into the mating groove and affecting subsequent cleaning.

[0014] Furthermore, the reciprocating rotation angle range of the telescopic rod is adapted to the spiral parameters of the spiral guide groove; ensuring the precise fit between the mating groove and the spiral turbulence protrusion, guaranteeing the uniformity of turbulence during mixing and the thoroughness of scraping during cleaning, and avoiding jamming or excessive local wear caused by misalignment.

[0015] Furthermore, the guide holes and spiral guide grooves of the two telescopic components on the rear side of the mixing component and the discharge component, as well as the spiral turbulence protrusions in the corresponding mixing chamber and discharge chamber, adopt different spiral directions or spiral angles respectively; different spiral directions or spiral angles allow the material to generate a change in rotation direction or a sudden change in flow rate gradient during the two mixing processes, forming a differentiated rotating mixing flow field to enhance the mixing uniformity.

[0016] Furthermore, during the axial movement of the telescopic rod, the feed port and return port are connected only when the mixing chamber is closed; the timing of liquid circulation is precisely controlled to avoid the diversion and backflow of raw materials during the mixing process, which would affect the mixing efficiency and uniformity.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention achieves efficient and uniform multi-stage mixing, while also enabling efficient and thorough self-cleaning, ensuring production continuity and stability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of the first hybrid head structure of the present invention.

[0021] Figure 3 This is a schematic cross-sectional view of the second hybrid head structure of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the telescopic rod of the present invention.

[0023] Figure 5 This is a partial cross-sectional view of the hybrid head structure of the present invention.

[0024] The labels in the attached diagram are as follows: 1-frame, 2-tank, 3-metering system, 4-control system, 5-mixing head, 6-mixing component, 7-discharge component, 8-telescopic assembly, 61-mixing chamber, 62-feed port, 63-return port, 71-discharge chamber, 81-cylinder, 82-piston, 83-telescopic rod, 84-guide hole, 85-guide column, 86-guide slider, 87-guide groove, 88-return groove, 831-fitting groove, 832-turbulence protrusion. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings: Example

[0026] A mixing device for processing memory foam foam raw materials, such as Figures 1-5 As shown, it includes a frame 1, at least two sets of material tanks 2 disposed on the frame 1 for storing foaming raw materials; a metering system 3 connected to the material tanks 2, a high-pressure mixing head 5 connected to the metering system 3, and a control system 4;

[0027] The mixing head 5 includes a mixing component 6 and a discharge component 7 connected to each other; the mixing component 6 has a mixing chamber 61 extending through its center; the discharge component 7 has a discharge chamber 71 extending through its center; the discharge chamber 71 is connected to the mixing chamber 61 and is perpendicular to the mixing chamber 61; the mixing component 6 has two oppositely arranged feed ports 62 and two return ports 63; the feed ports 62 and return ports 63 are connected to the mixing chamber 61.

[0028] Both the mixing component 6 and the discharge component 7 are provided with telescopic components 8 on their rear sides. The telescopic components 8 are cylinder structures, including a cylinder body 81, a piston 82, and a telescopic rod 83. The telescopic rod 83 extends into the mixing chamber 61 and the discharge chamber 71, respectively. The telescopic rod 83 extending into the mixing chamber 61 is provided with a return groove 88, which is used to connect the feed port 62 and the return port 63 when the mixing chamber 61 is closed to form a liquid circulation.

[0029] The telescopic assembly 8 also includes a guide mechanism, which includes a guide hole 84 disposed at the rear end of the piston 82 and a guide post 85 disposed in the cylinder 81 and cooperating with the guide hole 84; a guide slider 86 is provided protruding from the outer diameter surface of the guide post 85 near the piston 82; a guide groove 87 is provided in the guide hole 84 and cooperating with the guide slider 86, and the guide groove 87 is a spiral guide groove 87 disposed around the inner diameter surface of the guide hole 84;

[0030] The ends of the telescopic rods 83 in the mixing chamber 61 and the discharge chamber 71 are provided with mating grooves 831, which are spiral mating grooves 831 arranged around the outer diameter surface of the telescopic rods 83; the inner diameter surfaces of the mixing chamber 61 and the discharge chamber 71 are respectively provided with spiral turbulence protrusions 832 that mate with the mating grooves 831 provided on the telescopic rods 83.

[0031] Working principle:

[0032] When the equipment is in standby mode, the telescopic components 8 on the rear side of the mixing component 6 and the discharge component 7 are both in the extended state. At this time, the front ends of the two telescopic rods 83 respectively close the mixing chamber 61 and the discharge chamber 71. Inside the mixing chamber 61, the return groove 88 set on the extended telescopic rod 83 connects the two feed ports 62 and the two return ports 63. After the raw material pressurized by the metering system 3 is transported from the material tank 2 to the feed port 62, it flows directly through the channel formed by the return groove 88 to the return port 63 and returns to the system, establishing a high-pressure internal circulation loop.

[0033] When the control system 4 issues a mixing command, the telescopic component 8 on the rear side of the discharge component 7 acts first. Driven by a cylinder, its telescopic rod 83 retracts axially and rotates circumferentially with the aid of a guide mechanism, causing the telescopic rod 83 to exit the discharge chamber 71, opening a channel for the discharge of the mixture. Subsequently, the telescopic component 8 on the rear side of the mixing component 6 acts in the same manner, with its telescopic rod 83 retracting axially and rotating circumferentially. The retraction of the rod first cuts off the circulation loop formed by the return groove 88, then fully opens the mixing chamber 61. Two pre-pressurized raw materials are injected into the center of the mixing chamber 61 at extremely high speed from the oppositely positioned feed ports 62, resulting in a high-speed head-on collision and vigorous mixing of the materials. After the mixing chamber 61 opens, the spiral turbulence fixed to its inner wall... With the protrusions 832 fully exposed, the splashed liquid from the high-speed collision is forced to generate strong shearing and rotational motion as it flows through these protrusions, undergoing a second mixing. The mixture then enters the discharge chamber 71, which is perpendicular to it and already in the open state. When the material enters the discharge chamber 71 from the mixing chamber 61, it first impacts the inner wall of the inlet of the discharge chamber 71, forming turbulence. Then, as the material flows through the spiral turbulence protrusions 832 on the inner wall of the discharge chamber 71, it is subjected to rotational shearing force again. By designing different spiral directions or angles for the turbulence protrusions 832 of the mixing chamber 61 and the discharge chamber 71, the material can generate flow field switching and abrupt changes in flow velocity gradient during the two rotational mixing processes, thereby greatly enhancing the uniformity and fineness of the mixing. Finally, the fully mixed liquid is ejected at high speed from the discharge outlet.

[0034] After the mixing operation is completed, the telescopic component 8 on the rear side of the mixing component 6 is activated, and the telescopic rod 83 performs a compound motion of axial advancement and small-angle reciprocating rotation. When its end enters the mixing chamber 61, the spiral mating groove 831 on the rod gradually engages with the spiral turbulence protrusion 832 in the chamber. This compound motion allows the edge of the mating groove 831 to not only sweep axially across the surface of the protrusion, but also to generate a scraping and grinding effect through rotation, thoroughly removing the residual solidified material adhering to the protrusion and the chamber wall, achieving efficient self-cleaning. When the telescopic rod 83 is fully extended, the mixing chamber 61 is closed, and the internal cleaning is completed. Subsequently, the telescopic component 8 on the rear side of the discharge component 7 advances in the same compound motion manner, and its telescopic rod 83 extends into the discharge chamber 71 during rotation, thoroughly cleaning the turbulence protrusion 832 and the chamber wall in the discharge chamber 71 using the same "scraping and grinding" principle. After the telescopic rod 83 is fully extended, the equipment returns to the standby state, preparing for the next cycle.

[0035] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0036] Although this disclosure has been described in detail with reference to exemplary embodiments, it is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of this disclosure.

Claims

1. A mixing device for processing memory foam foam raw materials, comprising a frame (1), at least two sets of material tanks (2) disposed on the frame (1) for storing foam raw materials; a metering system (3) connected to the material tanks (2), a high-pressure mixing head (5) connected to the metering system (3), and a control system (4); Its features are, The mixing head (5) includes a mixing component (6) and a discharge component (7) connected to each other; the mixing component (6) has a mixing chamber (61) through the center of the mixing component (6); the discharge component (7) has a discharge chamber (71) through the center of the discharge component (7); the discharge chamber (71) is connected to the mixing chamber (61) and is perpendicular to the mixing chamber (61); the mixing component (6) has two oppositely arranged feed ports (62) and two return ports (63); the feed ports (62) and return ports (63) are connected to the mixing chamber (61); The rear sides of the mixing component (6) and the discharge component (7) are provided with telescopic components (8). The telescopic components (8) are cylinder structures, including a cylinder body (81), a piston (82) and a telescopic rod (83). The telescopic rod (83) extends into the mixing chamber (61) and the discharge chamber (71) respectively. The telescopic rod (83) extending into the mixing chamber (61) is provided with a return groove (88) for connecting the feed port (62) and the return port (63) when the mixing chamber (61) is closed to form a liquid circulation; The telescopic assembly (8) further includes a guide mechanism, which includes a guide hole (84) disposed at the rear end of the piston (82) and a guide post (85) disposed in the cylinder (81) and cooperating with the guide hole (84); a guide slider (86) is provided protruding from the outer diameter surface of the guide post (85) near the piston (82); a guide groove (87) is provided in the guide hole (84) and cooperating with the guide slider (86), the guide groove (87) being a spiral guide groove (87) surrounding the inner diameter surface of the guide hole (84); The ends of the telescopic rods (83) in the mixing chamber (61) and the discharge chamber (71) are provided with mating grooves (831), which are spiral mating grooves (831) arranged around the outer diameter surface of the telescopic rods (83); the inner diameter surfaces of the mixing chambers (61) and the discharge chambers (71) are respectively provided with spiral turbulence protrusions (832) that mate with the mating grooves (831) provided on the telescopic rods (83).

2. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, At least two protruding guide sliders (86) are provided on the guide post (85) and are evenly distributed around the outer diameter surface of the guide post (85); the corresponding guide hole (84) is also provided with the same number of guide grooves (87) that cooperate with the guide sliders (86).

3. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, At least two mating grooves (831) are provided on the telescopic rod (83) in the mixing chamber (61) and the discharge chamber (71), and the mating grooves (831) are evenly distributed around the outer diameter surface of the telescopic rod (83); the same number of spiral turbulence protrusions (832) that mate with the mating grooves (831) are also provided in the corresponding mixing chamber (61) and discharge chamber (71).

4. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, The mating groove (831) on the telescopic rod (83) in the mixing chamber (61) is offset from the return groove (88) on it.

5. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, The axial length of the spiral turbulence protrusion (832) is longer than the axial movement distance of the telescopic rod (83); so that the spiral turbulence protrusion (832) is close to one end of the telescopic assembly (8) and always maintains a sliding fit with the inner wall of the mating groove (831).

6. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, The reciprocating rotation angle range of the telescopic rod (83) is adapted to the helical parameters of the helical guide groove (87).

7. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, The guide holes (84) and spiral guide grooves (87) of the two telescopic components (8) on the rear side of the mixing component (6) and the discharge component (7), and the spiral turbulence protrusions (832) in the corresponding mixing chamber (61) and discharge chamber (71) respectively adopt different spiral directions or spiral angles.

8. The mixing equipment for processing memory foam foam raw materials according to claim 1, characterized in that, During the axial movement of the telescopic rod (83), the reversion groove (88) connects the feed port (62) and the return port (63) only when the mixing chamber (61) is closed.

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