Pearl wool foaming stirrer

Abstract

The invention discloses a pearl wool foaming stirrer, and relates to the technical field of foaming stirring equipment. A plurality of cooling cavities are formed between an outer cylinder and an inner cylinder of a stirring arm assembly, so that during stirring, a wedge block of a driving assembly pushes a second spherical block of a stirring arm to drive a piston assembly to do reciprocating motion, and circulating flow of cooling liquid among the cooling cavities, the inner cylinder and a heat dissipation unit is achieved; therefore, heat generated by friction between the outer wall of the stirring arm and the pearl wool foaming material is taken away in time, the problems of foaming agent decomposition and polyethylene particle structure breakage caused by local overheating are solved fundamentally, and the original performance of the material is guaranteed. Each cooling cavity is internally provided with an independent plugging plate, the plugging or opening state of the plugging plates to the cooling cavities can be controlled by rotating the screws, namely the more the plugged cooling cavities are, the less the cooling liquid participating in circulation is, the weaker the cooling capacity is, otherwise, the stronger the cooling capacity is, and the cooling strength can be flexibly adjusted according to the stirring working condition through the design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foaming stirring equipment, in particular to a pearl wool foaming stirring machine. BACKGROUND

[0002] The pearl wool foaming mainly adopts a physical foaming method, and the principle is to utilize the characteristics of rapid gasification and expansion of a foaming agent at high temperature. Low-density polyethylene particles, butane foaming agent, antistatic agent and other additives are mixed in proportion, the mixture enters an extruder, and is melted into a viscous fluid at 160-200 DEG C through mechanical shearing of a screw and external heating, and the butane foaming agent is uniformly dispersed therein. When the molten material is extruded through a die, the pressure drops suddenly, the butane is rapidly vaporized to form a large number of micro-bubbles, the material volume is expanded several times, a porous structure is formed, and then the material is cooled and shaped to solidify the bubble structure to form pearl wool.

[0003] Among them, before foaming, low-density polyethylene particles as main materials are put into a high-speed mixer according to accurate proportions with butane foaming agent, monoglyceride, antistatic agent and the like for premixing, so as to ensure that the foaming agent is uniformly coated on the surface of the plastic particles and realize the effect of preliminary dispersion of the foaming agent, laying a foundation for uniform foaming in the subsequent extrusion process.

[0004] However, the conventional high-speed premixing equipment only controls the mixing process through fixed rotating speed and fixed stirring time, and does not consider the dynamic coupling effect of shearing heat and environmental temperature: when high-speed stirring, the friction between the paddle and the material and the material particles generates local shearing heat, resulting in slight temperature fluctuation in the mixing cavity, the saturated vapor pressure of butane is extremely sensitive to temperature, and the local temperature rise will make part of the liquid butane vaporize in advance to form micro-bubble nuclei, at the same time, the shearing heat and the environmental temperature make the temperature of the local area of the mixing cavity rise obviously, resulting in that part of the monoglyceride powder melts to form a liquid film, the melted monoglyceride film will spontaneously wrap the polyethylene particles and butane micro-bubble nuclei to form a composite agglomerate, and the agglomerate will solidify after cooling at room temperature, and cannot be completely dispersed by the subsequent extruder screw shearing.

[0005] Therefore, the present application provides a pearl wool foaming stirring machine to solve the above problems. SUMMARY

[0006] To address the shortcomings of existing technologies, this invention provides a pearl cotton foaming mixer, which solves the problem that current conventional high-speed premixing equipment relies solely on fixed rotation speed and mixing time to control the mixing process, without considering the dynamic coupling effect of shear heat and ambient temperature. During high-speed mixing, friction between the blades and the material, as well as between the material particles, generates local shear heat, causing slight temperature fluctuations inside the mixing chamber. The saturated vapor pressure of butane is extremely sensitive to temperature, and local heating causes it to vaporize prematurely, forming microbubble nuclei. At the same time, the shear heat superimposed on the ambient temperature causes the monoglyceride powder to melt into a liquid film. The film encapsulates the polyethylene particles and butane microbubble nuclei to form a composite agglomerate. Furthermore, after the agglomerate is cooled and solidified at room temperature, it cannot be completely dispersed by the subsequent extruder screw shearing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pearl cotton foaming mixer, comprising a support frame, and further comprising: The foaming mixing drum is fixedly installed inside the support frame to provide space for the premixing of pearl cotton foam material. The outer wall of the foaming mixing drum is provided with an inlet for feeding the foam material and an outlet for discharging the premixed finished product. A motor frame is fixedly mounted on the top of the foaming mixing drum, and a servo motor for providing power for the premixing of pearl cotton foaming material is fixedly mounted on the top of the motor frame. The mixing mechanism is located inside the foaming mixing drum. Driven by a servo motor, it mixes and stirs the pearl cotton foam material. While performing the stirring action, the mixing mechanism uses rotational power to drive the internal coolant to circulate, thereby removing the heat generated by friction between its outer wall and the pearl cotton foam material. This avoids the risk of local overheating causing the foaming agent and polyethylene particle structure to break. The cooling capacity can be flexibly adjusted according to the amount of frictional heat. At the same time, the mixing mechanism automatically extracts the foaming agent during the stirring process and sprays it evenly in the longitudinal direction.

[0008] Furthermore, multiple driving components are uniformly fixed on the inner wall of the foaming mixing cylinder to cooperate in driving the coolant circulation in the mixing mechanism. The driving component includes a driving plate, and a wedge block is fixedly provided on the top of the driving plate. The two ends of the wedge block are provided with chamfers.

[0009] Furthermore, a heat dissipation unit is fixedly installed at the top of the foaming mixing drum and inside the motor frame. Multiple heat dissipation fins are evenly arranged on the outer wall of the heat dissipation unit. A feeding cylinder unit for driving the mixing mechanism to automatically draw foaming agent is also provided at the bottom of the support frame. The feeding cylinder unit includes a feeding cylinder, and multiple lifting blocks are evenly fixedly installed at the bottom of the inner cavity of the feeding cylinder.

[0010] Furthermore, the mixing mechanism includes a main shaft assembly, on the outer wall of which multiple stirring arm assemblies are mounted via a bracket. Each stirring arm assembly includes an outer cylinder and an inner cylinder fixedly mounted inside the outer cylinder. Multiple cooling chambers are formed between the outer and inner cylinders. A sealing plate is slidably mounted inside each cooling chamber. A screw is rotatably mounted at the bottom of the sealing plate, with the screw threaded through the outer cylinder and extending to the outside. A unidirectional flow unit for controlling the unidirectional flow of coolant is provided at the bottom of the inner cavity of the inner cylinder. The unidirectional flow unit includes a sealing plate fixedly mounted inside the inner cylinder. A coolant channel is opened at the top center of the sealing plate. A rotating seat is also fixedly mounted on one side of the top of the sealing plate. A third unidirectional sealing plug for sealing the coolant channel is rotatably mounted inside the rotating seat.

[0011] Furthermore, a push-pull rod slides through both sides of the bottom of the sealing plate. A second spherical block is fixedly installed at the bottom of the two push-pull rods, and a piston assembly is fixedly installed at their top. A spring limiting ring is fixedly sleeved on the push-pull rod below the outer wall of the sealing plate. A second spring is slidably sleeved on the outer wall of the push-pull rod between the sealing plate and the spring limiting ring. The tops of the two push-pull rods slide through the sealing plate and are fixedly installed with the piston assembly. A coolant return pipe for transporting coolant from the inner cylinder to the heat dissipation unit is fixedly installed at the middle of the top of the outer cylinder. Return branch pipes corresponding to the positions of multiple cooling chambers are evenly fixedly installed on the top of the outer cylinder. Each return branch pipe is connected to one of the cooling chambers. An annular pipe is fixedly connected to the top of the multiple return branch pipes. A coolant output pipe is fixedly installed on one side of the top of the annular pipe. The top of the coolant output pipe is connected to the inside of the heat dissipation unit.

[0012] Furthermore, the piston assembly includes a piston body that is slidably and sealed inside the inner cylinder and a support frame that is fixedly mounted on the top of the piston body. Both sides of the outer wall of the support frame are provided with discharge ports. The bottom of the piston body is provided with a through hole. A second one-way sealing plug is slidably and sealed inside the through hole. A second guide rod is fixedly mounted on the top of the second one-way sealing plug. The second guide rod slides through the support frame and extends to the outside. A third spring is slidably sleeved on the outer wall of the second guide rod and located between the piston body and the support frame.

[0013] Furthermore, the main shaft assembly includes a drive shaft and a first suction assembly and a second suction assembly disposed on both sides inside the drive shaft. The first suction assembly and the second suction assembly have the same structure. The first suction assembly includes a foaming agent delivery pipe. Multiple nozzles are uniformly fixedly disposed on the outer wall of the foaming agent delivery pipe from top to bottom. Each nozzle passes through the drive shaft and extends to the outside. A miniature one-way valve for controlling the discharge of foaming agent only from the foaming agent delivery pipe is also fixedly disposed inside the nozzle. A first self-priming unit for automatically extracting foaming agent is fixedly disposed at the bottom end of the foaming agent delivery pipe.

[0014] Furthermore, the first self-priming unit includes a self-priming tube and a partition fixedly disposed at the bottom of the self-priming tube. A first foaming agent channel is opened at the top center of the partition. A first one-way sealing plug for sealing the first foaming agent channel is also rotatably disposed at the top of the partition. A lifting rod slides through both sides of the interior of the partition. A first spherical block and a second self-priming unit are fixedly disposed at the bottom and top of the two lifting rods, respectively. A first spring is slidably sleeved on the outer wall of the lifting rod between the partition and the first spherical block.

[0015] Furthermore, the second self-priming unit includes a self-priming piston body that is sealed and slidably disposed inside the self-priming tube. A limit frame is fixedly disposed on the top of the self-priming piston body, and discharge ports are opened on both sides of the outer wall of the limit frame. A second foaming agent channel is also opened at the middle position of the top of the self-priming piston body. A sealing plug is slidably disposed inside the second foaming agent channel. A first guide rod is fixedly disposed on the top of the sealing plug. A fourth spring is slidably sleeved on the outer wall of the first guide rod between the sealing plug and the limit frame.

[0016] This invention provides a pearl cotton foaming mixer. Compared with the prior art, it has the following advantages: 1. A pearl cotton foaming mixer, wherein multiple cooling chambers are set between the outer and inner cylinders of the mixing arm assembly, so that during mixing, the wedge block of the drive assembly pushes the second spherical block of the mixing arm, which drives the piston assembly to reciprocate, realizing the circulation of coolant between the cooling chamber, the inner cylinder and the heat dissipation unit, thereby timely removing the heat generated by the friction between the outer wall of the mixing arm and the pearl cotton foaming material, fundamentally avoiding the problems of foaming agent decomposition and polyethylene particle structure breakage caused by local overheating, ensuring the original performance of the material, and improving the foaming uniformity and structural strength of the final pearl cotton product; Secondly, each cooling chamber is equipped with an independent sealing plate. The sealing plate can be controlled to block or open the cooling chamber by rotating the screw. The more cooling chambers are blocked, the less coolant participates in the circulation and the weaker the cooling capacity. Conversely, the more cooling chambers are blocked, the stronger the cooling capacity. This design can flexibly adjust the cooling intensity according to the stirring conditions, which can avoid material damage due to insufficient cooling and prevent energy waste due to excessive cooling, thus achieving precise adaptation.

[0017] 2. A pearl cotton foaming mixer, which integrates a first suction component, a second suction component, and a feeding cylinder unit through a main shaft assembly to achieve automated and uniform supply of foaming agent. Specifically, when the main shaft rotates, the first spherical block of the suction component rotates with the main shaft and periodically contacts the lifting block inside the feeding cylinder. The lifting block pushes the first spherical block upward, causing the second self-priming unit to move upward and create negative pressure, thus sucking the foaming agent in the feeding cylinder. After the first spherical block detaches from the lifting block, the first spring pulls the second self-priming unit downward, squeezing the foaming agent into the foaming agent delivery pipe. The entire suction process is completed by the rotational power of the main shaft, without the need for an additional pump, simplifying the equipment structure and reducing energy consumption and failure risk.

[0018] Secondly, multiple nozzles are evenly arranged on the outer wall of the foaming agent delivery pipe from top to bottom, and the nozzles extend through the drive shaft to the outside. During the rotation of the main shaft, the foaming agent is evenly sprayed along the longitudinal space of the mixing drum, making full contact with polyethylene particles and other additives, avoiding excessively high or low concentrations of foaming agent in some areas, ensuring the consistency of material mixing, and thus improving the density uniformity and mechanical properties of the finished pearl cotton product.

[0019] 3. A pearl cotton foaming mixer, which achieves the reciprocating motion of the piston assembly through the mechanical cooperation of the drive component and the mixing arm assembly, thereby driving the circulation of coolant. No additional circulation pump or power source is required, reducing the number of equipment parts, lowering maintenance costs, and improving system integration. Secondly, an annular heat dissipation unit is set on the top of the support frame. The heat dissipation fins on its outer wall increase the contact area with air. When the coolant flows through the heat dissipation unit, it cools down quickly, ensuring that the coolant returning to the cooling chamber is always at a low temperature, maintaining the continuous and effective operation of the cooling system, avoiding cooling failure due to excessively high coolant temperature, and ensuring stable operation of the equipment for a long time.

[0020] 4. A pearl cotton foaming mixer, which sets a first one-way sealing plug and a second one-way sealing plug in the coolant circulation path, and sets a second one-way sealing plug and a miniature one-way valve in the foaming agent suction path, etc., to strictly control the fluid flow direction, prevent the cooling efficiency from decreasing due to coolant backflow, and prevent the supply from running out of control due to foaming agent backflow, thereby improving the reliability of operation.

[0021] Other advantages, objectives, and features of the 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, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second overall three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the first cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the second cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of part A in the diagram; Figure 6 This is a schematic diagram of the structure of the foaming mixing tank of the present invention. Figure 7 This is a cross-sectional view of the main shaft assembly and stirring arm assembly of the present invention in their assembled state; Figure 8 For the present invention Figure 7 A magnified structural diagram of part B in the diagram; Figure 9 For the present invention Figure 7 A magnified structural diagram of part C in the diagram; Figure 10 This is a cross-sectional view of the stirring arm assembly of the present invention; Figure 11 For the present invention Figure 10 A magnified structural diagram of part D in the diagram; Figure 12 This is a partial cross-sectional view of the stirring arm assembly of the present invention; Figure 13 This is a schematic diagram of the assembly state of the outer cylinder and inner cylinder of the present invention; Figure 14 This is a schematic diagram of the assembled structure of the piston assembly and unidirectional flow unit of the present invention. Figure 15 This is a cross-sectional view of the piston assembly of the present invention; Figure 16 This is a schematic diagram of the decomposed state structure of the unidirectional flow unit of the present invention; Figure 17 This is a schematic diagram of the spindle assembly structure of the present invention; Figure 18 This is a schematic diagram of the first suction unit structure of the present invention; Figure 19 This is a cross-sectional view of the self-priming unit of the present invention; Figure 20 This is a cross-sectional structural diagram of the self-priming piston body of the present invention.

[0023] In the diagram: 1. Support frame; 2. Foaming mixing drum; 3. Motor frame; 4. Servo motor; 5. Mixing mechanism; 51. Main shaft assembly; 511. Drive shaft; 512. First suction assembly; 5121. Foaming agent delivery pipe; 5122. Nozzle; 5123. Miniature one-way valve; 5124. First self-priming unit; b1. Self-priming pipe; b2. Partition plate; b3. First foaming agent channel; b4. First one-way sealing plug; b5. Lifting rod; b6. First spherical block; b7. First spring; b8. Second self-priming unit; b81. Self-priming piston body; b82. Limiting frame; b83. Discharge port; b84. Second foaming agent channel; b85. Sealing plug; b86. First guide rod; b87. Fourth spring; 513. Second suction assembly; 52. Mixing arm assembly; 521. Outer cylinder; 522. Inner cylinder; 523. Cooling chamber; 524. Sealing plate; 525. Screw; 526. Sealing plate; 527. Coolant passage; 528. Rotating seat; 529. Third one-way sealing plug; 5210. Push-pull rod; 5211. Second spherical block; 5212. Spring limiting ring; 5213. Second spring; 5214. Piston assembly; a1. Piston body; a2. Support frame; a3. Discharge port; a4. Through hole; a5. Second one-way sealing plug; a6. Second guide rod; a7. Third spring; 5215. Coolant return pipe; 5216. Return branch pipe; 5217. Annular pipe; 5218. Coolant output pipe; 6. Drive assembly; 61. Drive plate; 62. Wedge block; 7. Heat dissipation unit; 8. Feeding cylinder unit; 81. Feeding cylinder; 82. Lifting block. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides two technical solutions: a pearl cotton foaming mixer, specifically including the following embodiments: like Figures 1-4 A first embodiment is shown: a pearl cotton foaming mixer, including a support frame 1, and further comprising: The foaming mixing drum 2 is fixedly installed inside the support frame 1 to provide space for the premixing of pearl cotton foaming material. The outer wall of the foaming mixing drum 2 is provided with an inlet for feeding foaming material and an outlet for discharging premixed finished product. The motor frame 3 is fixedly installed on the top of the foaming mixing drum 2. A servo motor 4 for providing power for the premixing of pearl cotton foaming material is fixedly installed on the top of the motor frame 3. The mixing mechanism 5 is movably installed inside the foaming mixing drum 2. Driven by the servo motor 4, it mixes and stirs the pearl cotton foam material. While performing the stirring action, the mixing mechanism 5 uses rotational power to drive the internal coolant to circulate, removing heat generated by friction between its outer wall and the pearl cotton foam material. This avoids the risk of localized overheating causing breakage of the foaming agent and polyethylene granules. The cooling capacity can be flexibly adjusted according to the amount of frictional heat. Simultaneously, the mixing mechanism 5 automatically extracts the foaming agent during the stirring process and sprays it evenly in the longitudinal direction. A controller is also fixedly installed on one side of the outer wall of the foaming mixing drum 2, which controls the operation of all electrical equipment. The output shaft of the servo motor 4 is fixedly connected to the top of the main shaft assembly 51.

[0026] In this embodiment, a plurality of driving components 6 are uniformly fixed on the inner wall of the foaming mixing cylinder 2 to cooperate in driving the coolant circulation in the mixing mechanism 5. The driving component 6 includes a driving plate 61, and a wedge block 62 is fixedly provided on the top of the driving plate 61. Both ends of the wedge block 62 are provided with chamfers.

[0027] In this embodiment, a heat dissipation unit 7 is fixedly installed at the top of the foaming mixing drum 2 and inside the motor frame 3. Multiple heat dissipation fins are evenly distributed on the outer wall of the heat dissipation unit 7. A feeding cylinder unit 8 for driving the mixing mechanism 5 to automatically draw in the foaming agent is also installed at the bottom of the support frame 1. The feeding cylinder unit 8 includes a feeding cylinder 81, and multiple lifting blocks 82 are evenly fixedly installed at the bottom of the inner cavity of the feeding cylinder 81. The lifting blocks 82 correspond one-to-one with the first spherical blocks b6 in the first suction assembly 512 and the second suction assembly 513. The heat dissipation unit 7 has a ring-shaped structure, and the output shaft of the servo motor 4 can pass through the central space of the heat dissipation unit 7 to drive the mixing mechanism 5 to rotate.

[0028] like Figures 5-20The second embodiment is shown, which differs from the first embodiment in that: the mixing mechanism 5 includes a main shaft assembly 51, on which a plurality of stirring arm assemblies 52 are mounted via brackets on the outer wall of the main shaft assembly 51. Each stirring arm assembly 52 includes an outer cylinder 521 and an inner cylinder 522 fixedly disposed inside the outer cylinder 521. A plurality of cooling chambers 523 are formed between the outer cylinder 521 and the inner cylinder 522. A sealing plate 524 is slidably and sealingly disposed inside each cooling chamber 523, and a screw 5 is rotatably mounted on the bottom of the sealing plate 524. 25. The screw 525 is threaded through the outer cylinder 521 and extends to the outside. The bottom of the inner cavity of the inner cylinder 522 is provided with a one-way flow unit for controlling the one-way flow of coolant. The one-way flow unit includes a sealing plate 526 fixedly installed inside the inner cylinder 522. A coolant channel 527 is opened at the middle of the top of the sealing plate 526. A rotating seat 528 is also fixedly installed on one side of the top of the sealing plate 526. A third one-way sealing plug 529 for blocking the coolant channel 527 is rotatably installed in the rotating seat 528. Since there are multiple cooling chambers 523, and each cooling chamber 523 has a sealing and sliding sealing plate 524 inside, the flow of coolant in the corresponding cooling chamber 523 can be controlled by controlling the sealing plate 524 to block or detach from the corresponding cooling chamber 523. That is, the more cooling chambers 523 are blocked, the fewer cooling chambers 523 can be filled with coolant, and the smaller the cooling capacity. Conversely, the smaller the number of blocking cooling chambers 523, the greater the cooling capacity. Each cooling chamber 523 is filled with coolant.

[0029] In this embodiment, a push-pull rod 5210 slides through both sides of the bottom of the sealing plate 526. A second spherical block 5211 is fixedly mounted at the bottom end of both push-pull rods 5210, and a piston assembly 5214 is fixedly mounted at their top ends. A spring limiting ring 5212 is fixedly sleeved on the push-pull rod 5210 below the outer wall of the sealing plate 526. A second spring 5213 is slidably sleeved on the outer wall of the push-pull rod 5210 between the sealing plate 526 and the spring limiting ring 5212. The top ends of both push-pull rods 5210 slide through the sealing plate 526 and are jointly fixedly mounted with the piston assembly 5214. A piston assembly for... is fixedly mounted at the middle of the top end of the outer cylinder 521. The coolant in the inner cylinder 522 is transported to the coolant return pipe 5215 in the heat dissipation unit 7. The top of the outer cylinder 521 is uniformly fixed with return branch pipes 5216 corresponding to the positions of multiple cooling chambers 523. Each return branch pipe 5216 is connected to one of the cooling chambers 523. The top ends of multiple return branch pipes 5216 are fixedly connected to an annular pipe 5217. A coolant output pipe 5218 is fixedly installed on one side of the top of the annular pipe 5217. The top end of the coolant output pipe 5218 is connected to the inside of the heat dissipation unit 7.

[0030] In this embodiment, the piston assembly 5214 includes a piston body a1 that is slidably and sealingly disposed inside the inner cylinder 522 and a support frame a2 that is fixedly disposed on the top of the piston body a1. Discharge ports a3 are provided on both sides of the outer wall of the support frame a2. A through hole a4 is provided at the bottom of the piston body a1. A second one-way sealing plug a5 is slidably and sealingly disposed within the through hole a4. A second guide rod a6 is fixedly disposed on the top of the second one-way sealing plug a5. The second guide rod a6 slidably passes through the support frame a2 and extends to the outside. A third spring a7 is slidably sleeved on the outer wall of the second guide rod a6, located between the piston body a1 and the support frame a2. The top ends of both push-pull rods 5210 are fixedly disposed at the bottom of the piston body a1.

[0031] In this embodiment, the main shaft assembly 51 includes a drive shaft 511 and a first suction assembly 512 and a second suction assembly 513 disposed on both sides inside the drive shaft 511. The first suction assembly 512 and the second suction assembly 513 have the same structure. The first suction assembly 512 includes a foaming agent delivery pipe 5121. Multiple nozzles 5122 are uniformly fixedly arranged from top to bottom on the outer wall of the foaming agent delivery pipe 5121. Each nozzle 5122 passes through the drive shaft 511 and extends to the outside. A miniature one-way valve 5123 is also fixedly arranged inside the nozzle 5122 to control the foaming agent to be discharged only from the foaming agent delivery pipe 5121. A first self-priming unit 5124 for automatically extracting foaming agent is fixedly arranged at the bottom end of the foaming agent delivery pipe 5121. An infusion pipe for replenishing foaming agent is fixedly arranged on the outer wall of the feeding cylinder unit 8. An input one-way valve that allows foaming agent to flow only into the feeding cylinder unit 8 is fixedly arranged inside the infusion pipe. The bottom end of the drive shaft 511 rotates through the support frame 1 and extends into the feeding cylinder unit 8.

[0032] In this embodiment, the first self-priming unit 5124 includes a self-priming tube b1 and a partition b2 fixedly disposed at the bottom of the self-priming tube b1. A first foaming agent channel b3 is provided at the top middle position of the partition b2. A first one-way sealing plug b4 for sealing the first foaming agent channel b3 is also rotatably disposed at the top of the partition b2. A lifting rod b5 is slidably passed through both sides of the interior of the partition b2. A first spherical block b6 and a second self-priming unit b8 are fixedly disposed at the bottom and top of the two lifting rods b5, respectively. A first spring b7 is slidably sleeved on the outer wall of the lifting rod b5 between the partition b2 and the first spherical block b6.

[0033] In this embodiment, the second self-priming unit b8 includes a self-priming piston body b81 that is slidably and sealed inside the self-priming tube b1. A limit frame b82 is fixedly installed on the top of the self-priming piston body b81. Both sides of the outer wall of the limit frame b82 are provided with discharge ports b83. A second foaming agent channel b84 is also provided at the middle position of the top of the self-priming piston body b81. A sealing plug b85 is slidably and sealed inside the second foaming agent channel b84. A first guide rod b86 is fixedly installed on the top of the sealing plug b85. A fourth spring b87 is slidably sleeved on the outer wall of the first guide rod b86 between the sealing plug b85 and the limit frame b82. The top ends of the two lifting rods b5 are fixedly installed at the bottom of the self-priming piston body b81.

[0034] In use, first weigh a certain amount of polyethylene granules, set them aside for later use, and measure them according to the usage ratio of polyethylene granules, foaming agent and other additives. Then, put the weighed polyethylene granules and other solid additives into the foaming mixing drum 2 through the polyethylene granule inlet at the top of the foaming mixing drum 2. Next, put the measured fixed amount of foaming agent and other liquid additives into the feeding drum unit 8 through the liquid delivery pipe on the outer wall of the feeding drum unit 8.

[0035] Next, the servo motor 4 is started by the controller and runs at low speed according to the program. The output shaft of the servo motor 4 drives the main shaft assembly 51 to rotate. Multiple stirring arm assemblies 52 simultaneously stir the polyethylene particles and other solid additives located in the foaming mixing tank 2. While the main shaft assembly 51 rotates, the first suction assembly 512 and the second suction assembly 513 rotate synchronously. The two first spherical blocks b6 located in the first suction assembly 512 and the second suction assembly 513 are simultaneously acted upon by the lifting blocks 82 at their corresponding positions during the rotation, causing the two first spherical blocks b6 to move along their respective axes. The inclined surface at one end of the lifting block 82 rises to its top plane area, causing the two lifting rods b5 to push the second self-priming unit b8 upward. The greater suction force between the second self-priming unit b8 and the partition b2 reduces the pressure. The pressure on one side of the feeding cylinder unit 8 is greater than that on the side between the second self-priming unit b8 and the partition b2. Furthermore, since the bottom end of the self-priming pipe b1 is completely submerged in the foaming agent, the foaming agent in the feeding cylinder unit 8 pushes the first one-way sealing plug b4 upward under pressure, causing the first one-way sealing plug b4 to rotate and open around its side axis. The foaming agent then flows through the first foaming agent channel. When the first spherical block b6 slides off the top of the lifting block 82, the elastic force of the first spring b7 pulls the second self-priming unit b8 downward. The first one-way sealing plug b4 rotates in the opposite direction and closes as the pressure at the top increases, sealing the first foaming agent channel b3. When the first spherical block b6 meets the lifting block 82 again, the second self-priming unit b8 moves upward again to draw foaming agent from the feeding cylinder unit 8 until the space between the second self-priming unit b8 and the partition b2 is filled with foaming agent. Then, along the self-priming pipe b1 of the second self-priming unit b8... As the inner wall moves downward, the foaming agent between the second self-priming unit b8 and the partition b2 flows upward through the second foaming agent channel b84. As the self-priming piston body b81 moves downward, it squeezes the foaming agent, which pushes the sealing block b85 upward until the second foaming agent channel b84 is opened. The foaming agent enters the space above the second self-priming unit b8 through the discharge port b83. As the amount of foaming agent gradually increases, the foaming agent is sprayed from top to bottom onto the surface of the surrounding polyethylene particles through multiple nozzles 5122 on the outer wall of the foaming agent delivery pipe 5121, thus achieving the purpose of uniform mixing of polyethylene particles and foaming agent.

[0036] As the multiple stirring arm assemblies 52 rotate and meet the corresponding drive assembly 6, the second spherical block 5211 at the bottom of the outer cylinder 521 is pushed upward by the wedge block 62. The two push-pull rods 5210 push the piston assembly 5214 upward synchronously. The suction force generated by the upward movement of the piston assembly 5214 pulls the third one-way sealing plug 529 upward, causing the third one-way sealing plug 529 to rotate and flip around the rotating seat 528, exposing the coolant channel 527. The coolant in each cooling chamber 523 flows into the bottom of the sealing plate 526 through the cooling chamber 523 and flows upward through the through hole a4. Since the coolant in each cooling chamber 523 has already exchanged heat with the outer wall of the outer cylinder 521 and the surrounding polyethylene particles, At this time, the temperature is high. The second one-way sealing plug a5 is pushed by the upward flowing coolant, making the through hole a4 unobstructed. The coolant flows into the inner cylinder 522 through the discharge port a3. As the amount of coolant above the piston assembly 5214 increases, the coolant flows into the heat dissipation unit 7 through the coolant return pipe 5215. The high-temperature coolant exchanges heat with the air through the heat dissipation fins on the outer wall of the heat dissipation unit 7 to achieve rapid cooling. When the second spherical block 5211 and the drive assembly 6 separate, the second spring 5213 pushes the piston assembly 5214 downward. The third one-way sealing plug 529 blocks the coolant passage 527 under the action of downward pressure. The second one-way sealing plug a5 simultaneously blocks the through hole a4 to prevent coolant backflow. It should be noted that in the initial state, multiple sealing plates 524 are located outside the cooling chambers 523 at corresponding positions, meaning that the coolant in all cooling chambers 523 can flow freely. When one of the screws 525 is rotated to push the sealing plate 524 to seal the cooling chamber 523 at the corresponding position, the coolant in the cooling chamber 523 at that position cannot circulate and cannot participate in the cooling work, thereby controlling the amount of cooling.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pearl cotton foaming mixer, comprising a support frame, characterized in that, Also includes: The foaming mixing drum is fixedly installed inside the support frame to provide space for the premixing of pearl cotton foam material. The outer wall of the foaming mixing drum is provided with an inlet for feeding the foam material and an outlet for discharging the premixed finished product. A motor frame is fixedly mounted on the top of the foaming mixing drum, and a servo motor for providing power for the premixing of pearl cotton foaming material is fixedly mounted on the top of the motor frame. The mixing mechanism is located inside the foaming mixing drum. Driven by a servo motor, it mixes and stirs the pearl cotton foam material. While performing the stirring action, the mixing mechanism uses rotational power to drive the internal coolant to circulate, thereby removing the heat generated by friction between its outer wall and the pearl cotton foam material. This avoids the risk of local overheating causing the foaming agent and polyethylene particle structure to break. The cooling capacity can be flexibly adjusted according to the amount of frictional heat. At the same time, the mixing mechanism automatically extracts the foaming agent during the stirring process and sprays it evenly in the longitudinal direction.

2. The pearl cotton foaming mixer according to claim 1, characterized in that: Multiple drive components are uniformly fixed on the inner wall of the foaming mixing cylinder to cooperate with the circulation of coolant in the mixing mechanism. Each drive component includes a drive plate with a wedge block fixed on the top and chamfers at both ends.

3. The pearl cotton foaming mixer according to claim 1, characterized in that: A heat dissipation unit is fixedly installed at the top of the foaming mixing cylinder and inside the motor frame. Multiple heat dissipation fins are evenly arranged on the outer wall of the heat dissipation unit. A feeding cylinder unit for driving the mixing mechanism to automatically draw foaming agent is also provided at the bottom of the support frame. The feeding cylinder unit includes a feeding cylinder, and multiple lifting blocks are evenly fixedly arranged at the bottom of the inner cavity of the feeding cylinder.

4. The pearl cotton foaming mixer according to claim 1, characterized in that: The mixing mechanism includes a main shaft assembly. Multiple stirring arm assemblies are mounted on the outer wall of the main shaft assembly via a bracket. Each stirring arm assembly includes an outer cylinder and an inner cylinder fixedly mounted inside the outer cylinder. Multiple cooling chambers are formed between the outer cylinder and the inner cylinder. A sealing plate is slidably mounted inside each cooling chamber. A screw is rotatably mounted at the bottom of the sealing plate. The screw thread passes through the outer cylinder and extends to the outside. A unidirectional flow unit for controlling the unidirectional flow of coolant is provided at the bottom of the inner cavity of the inner cylinder. The unidirectional flow unit includes a sealing plate fixedly mounted inside the inner cylinder. A coolant channel is opened at the top center of the sealing plate. A rotating seat is also fixedly mounted on one side of the top of the sealing plate. A third unidirectional sealing plug for sealing the coolant channel is rotatably mounted inside the rotating seat.

5. The pearl cotton foaming mixer according to claim 4, characterized in that: A push-pull rod slides through both sides of the bottom of the sealing plate. A second spherical block is fixedly installed at the bottom of the two push-pull rods, and a piston assembly is fixedly installed at their top. A spring limiting ring is fixedly sleeved on the push-pull rod below the outer wall of the sealing plate. A second spring is slidably sleeved on the outer wall of the push-pull rod between the sealing plate and the spring limiting ring. The tops of the two push-pull rods slide through the sealing plate and are fixedly installed with the piston assembly. A coolant return pipe for transporting coolant from the inner cylinder to the heat dissipation unit is fixedly installed at the middle of the top of the outer cylinder. Return branch pipes corresponding to the positions of multiple cooling chambers are evenly fixedly installed on the top of the outer cylinder. Each return branch pipe is connected to one of the cooling chambers. An annular pipe is fixedly connected to the top of the multiple return branch pipes. A coolant output pipe is fixedly installed on one side of the top of the annular pipe. The top of the coolant output pipe is connected to the inside of the heat dissipation unit.

6. The pearl cotton foaming mixer according to claim 5, characterized in that: The piston assembly includes a piston body that is slidably and sealed inside the inner cylinder and a support frame that is fixedly mounted on the top of the piston body. Both sides of the outer wall of the support frame are provided with discharge ports. The bottom of the piston body is provided with a through hole. A second one-way sealing plug is slidably and sealed inside the through hole. A second guide rod is fixedly mounted on the top of the second one-way sealing plug. The second guide rod slides through the support frame and extends to the outside. A third spring is slidably sleeved on the outer wall of the second guide rod and located between the piston body and the support frame.

7. The pearl cotton foaming mixer according to claim 4, characterized in that: The main shaft assembly includes a drive shaft and a first suction assembly and a second suction assembly disposed on both sides inside the drive shaft. The first and second suction assemblies have the same structure. The first suction assembly includes a foaming agent delivery pipe. Multiple nozzles are uniformly fixedly arranged from top to bottom on the outer wall of the foaming agent delivery pipe. Each nozzle passes through the drive shaft and extends to the outside. A miniature one-way valve is also fixedly arranged inside the nozzle to control the discharge of foaming agent only from the foaming agent delivery pipe. A first self-priming unit for automatically extracting foaming agent is fixedly arranged at the bottom end of the foaming agent delivery pipe.

8. The pearl cotton foaming mixer according to claim 7, characterized in that: The first self-priming unit includes a self-priming tube and a partition fixedly disposed at the bottom of the self-priming tube. A first foaming agent channel is opened at the top center of the partition. A first one-way sealing plug for sealing the first foaming agent channel is also rotatably disposed at the top of the partition. A lifting rod slides through both sides of the inner side of the partition. A first spherical block and a second self-priming unit are fixedly disposed at the bottom and top of the two lifting rods, respectively. A first spring is slidably sleeved on the outer wall of the lifting rod between the partition and the first spherical block.

9. A pearl cotton foaming mixer according to claim 8, characterized in that: The second self-priming unit includes a self-priming piston body that is sealed and slidably disposed inside the self-priming tube. A limit frame is fixedly disposed on the top of the self-priming piston body. Both sides of the outer wall of the limit frame are provided with discharge ports. A second foaming agent channel is also provided at the middle position of the top of the self-priming piston body. A sealing plug is slidably disposed inside the second foaming agent channel. A first guide rod is fixedly disposed on the top of the sealing plug. A fourth spring is slidably sleeved on the outer wall of the first guide rod between the sealing plug and the limit frame.

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