A preparation device and preparation method of low-odor high-support PU foam

Abstract

The present invention relates to the technical field of injection molding equipment and methods, and proposes a low-odor and high-support PU foaming preparation equipment and a preparation method thereof, comprising a mold conveying frame, a mixing hot melt tank is provided on the upper part of the mold conveying frame, a feed premixing mechanism is provided on the upper end of the mixing hot melt tank, a discharge port is provided on the lower part of the mixing hot melt tank, an injection mechanism is provided at the discharge port, a tumbling mixing mechanism is provided inside the mixing hot melt tank, and the upper end of the tumbling mixing mechanism is connected to the feed premixing mechanism through a linkage mixing mechanism. Beneficial effects of the present invention: the mixing hot melt tank is used to melt granular polyurethane and auxiliary materials such as its foaming agent, the injection mechanism is used to inject the slurry inside the mixing hot melt tank into the mold for foaming molding, the tumbling mixing mechanism is used to tumble and mix the materials inside the mixing hot melt tank, and the gas-slurry mixture is convenient for better foaming in the later stage, and the linkage mixing mechanism further improves the mixing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of PU foaming equipment and methods, and in particular to a preparation equipment and a preparation method of low-odor high-support PU foam. Background Art

[0002] Polyurethane foam materials are widely used in many fields such as production and life, such as polyurethane insulation materials, polyurethane rolling shutter doors and windows, polyurethane tiles, polyurethane composite glass, polyurethane furniture, polyurethane flower pots and polyurethane guardrails. In these industries, the production equipment of polyurethane foam materials used mostly adopts air-blown mixed polyurethane foam equipment.

[0003] The low-odor and high-support PU foaming preparation equipment in the existing technology is not very sufficient in mixing the raw materials, resulting in low foaming efficiency in the later stage. Summary of the invention

[0004] The present invention provides a low-odor high-support PU foaming preparation device and a preparation method thereof, which can improve the foaming efficiency of the raw materials in the later stage by performing multi-stage mixing on the raw materials.

[0005] To this end, the present invention provides a preparation device for low-odor and high-support PU foam, including a mold conveying frame, a mixing hot melt tank is provided on the upper part of the mold conveying frame, a feed premixing mechanism is provided at the upper end of the mixing hot melt tank, a discharge port is provided at the lower part of the mixing hot melt tank, an injection mechanism is provided at the discharge port, a tumbling mixing mechanism is provided inside the mixing hot melt tank, and the upper end of the tumbling mixing mechanism is connected with the feed premixing mechanism through a linkage mixing mechanism.

[0006] By adopting the above technical scheme: the mold conveying frame is used to reciprocately convey the mold to be injected, the mixing hot melt tank is used to melt the granular polyurethane and its auxiliary materials such as foaming agent, the injection mechanism is used to inject the slurry inside the mixing hot melt tank into the mold for foaming molding, and the tumbling mixing mechanism is used to tumble and mix the materials inside the mixing hot melt tank. The gas-slurry mixture is convenient for better foaming in the later stage, and the linkage mixing mechanism further improves the mixing efficiency.

[0007] Optionally, the mold conveying frame is a circulating conveying frame, and an injection mold is provided on the upper part of the circulating conveying frame.

[0008] By adopting the above technical solution, the injection mold can reciprocate on the conveying frame for injection molding.

[0009] Optionally, the feed premixing mechanism includes a main material inlet pipe arranged on the upper part of the mixing hot melt tank, an auxiliary material funnel is provided on the peripheral side of the main material inlet pipe, the auxiliary material funnel is coated on the peripheral side of the main material inlet pipe, and an elastic lap-type feed trough is provided at the lower end thereof, the bottom end of the elastic lap-type feed trough is lower than the lower end of the main material inlet pipe, and also includes an adjustment component arranged between the main material inlet pipe and the auxiliary material funnel.

[0010] By adopting the above technical solution: the main material inlet pipe is used to transport polyurethane particles, the auxiliary material funnel is used to store and input auxiliary materials such as foaming agent into the mixing hot melt tank, and the elastic lap-type feed chute can adjust the gap between it and the main material inlet pipe under the drive of the adjustment component, so as to facilitate the adjustment of the amount of auxiliary materials entering.

[0011] Optionally, the elastic overlapping material discharge chute includes a plurality of overlapping baffles rotatably connected to the lower side of the auxiliary material funnel through a torsion shaft, the adjustment assembly includes an adjustment ring with a leakage hole slidably arranged on the main material inlet pipe, the adjustment ring is connected to the inner side of a plurality of the baffles, and a leakage gap is arranged between the lower ends of a plurality of the baffles and the outer wall of the main material inlet pipe, the upper part of the adjustment ring is connected to an adjusting screw, the upper end of the adjusting screw passes through a fixing ring arranged at the upper end of the main material inlet pipe and is fixed to the fixing ring through a nut, and the nut is attached to the lower side of the fixing ring.

[0012] By adopting the above technical solution: multiple baffles are arranged in a trumpet shape, and their upper ends are connected by a torsion shaft and have a certain elasticity to facilitate their positioning. By pushing the adjusting screw downward, the adjusting screw pushes the adjusting ring downward. Since the adjusting ring is connected to the inner side of the baffle, the baffle can be pushed to expand outward to overcome the elastic effect of the torsion shaft. At this time, the nut is rotated upward so that the nut is connected to the lower part of the fixed ring, so that the gap between the baffle and the main material entry tube becomes larger, thereby increasing the leakage of auxiliary materials. The opposite adjustment process can reduce the leakage of auxiliary materials.

[0013] Optionally, the tumbling mixing mechanism includes a driving cavity arranged at the bottom of the mixing hot melt tank, a rotating power part is fixedly connected to the inside of the driving cavity, the rotating power part is connected to an internal hollow driving shaft, the driving shaft is connected to an air intake pipe through a sealed bearing and a rotating joint, the air intake pipe is connected to an external high-pressure air source, a plurality of ventilation and stirring rods are connected to the driving shaft, and a tumbling part connected to the end of the ventilation and stirring rod is provided inside the mixing hot melt tank.

[0014] By adopting the above technical solution: the rotating power part can drive the driving shaft to rotate. Since the interior of the driving shaft is hollow and connected through the sealed bearing and the rotating joint, the gas from the external high-pressure gas source can enter the interior of the driving shaft through the air inlet pipe. The airflow can be sprayed through the ventilation stirring rod into the mixing hot melt tank to mix with the material. Secondly, it can be sprayed into the tumbling part to make the material inside the mixing hot melt tank tumble and mix. Thirdly, it can drive the linkage mixing mechanism to further mix the material.

[0015] Optionally, the outer side wall of the ventilation stirring rod is provided with a plurality of ventilation holes, the end of the ventilation stirring rod is provided with an air outlet hole, and the tumbling part includes an arc-shaped baffle plate arranged on the inner wall of the mixing hot melt tank, and the air outlet hole is located inside the arc-shaped baffle plate.

[0016] By adopting the above technical solution: the air flow can be sprayed into the mixing hot melt tank through the air holes to mix with the materials, and can be sprayed into the tumbling part through the air outlet holes to make the materials inside the mixing hot melt tank tumble, thereby improving the mixing efficiency.

[0017] Optionally, the linkage mixing mechanism includes a pneumatic component and a material disturbing component arranged at the top end of the driving shaft.

[0018] By adopting the above technical solution: the pneumatic component can provide power for preliminary mixing of materials, and the spoiler component is used to form a vortex during the rotation process to mix the materials more fully.

[0019] Optionally, the pneumatic assembly includes a pneumatic cavity with an opening facing upward and arranged at the top end of the driving shaft, and the top end of the driving shaft is connected to a pneumatic piston via an elastic member.

[0020] By adopting the above technical solution: when the airflow reaches the pneumatic cavity at the top of the drive shaft, it can push the pneumatic piston to move upward, thereby connecting the drive shaft and the pneumatic cavity.

[0021] Optionally, the material disrupting assembly includes a spoiler bowl arranged at the upper end of the pneumatic cavity, the spoiler bowl is provided with a plurality of oblique jet heads connected to the pneumatic cavity, a diverter column is provided in the middle of the spoiler bowl, the top of the diverter column extends to the lower end of the main material inlet pipe, and a spoiler is also provided on the upper part of the diverter column.

[0022] By adopting the above technical solution: driven by the driving shaft, the spoiler bowl rotates to drive the preliminarily mixed materials to form a vortex, thereby further improving the mixing efficiency; by setting a nozzle, the airflow can be ejected from the pneumatic cavity and the nozzle, and the vortex material further improves the mixing efficiency; the diverter column can divert the polyurethane force of the main material entering the tube to facilitate mixing with the auxiliary material; and the setting of the spoiler further improves the mixing effect.

[0023] The second aspect of the present invention provides a method for preparing low-odor high-support PU using the above-mentioned preparation equipment, comprising the following steps:

[0024] The mold conveying frame reciprocates to convey the mold, and the polyurethane particles and auxiliary materials are preliminarily mixed through the feeding premixing mechanism, and then further mixed through the linkage mixing mechanism, and swirl into the mixing hot melt tank, where they are hot-melted and fully mixed through the tumbling mixing mechanism, and then injected into the mold by the injection mechanism for foaming molding.

[0025] The working principle and beneficial effects of the present invention are:

[0026] 1. The mold conveying frame is used to reciprocate the mold to be injected. The mixing hot melt tank is used to melt the granular polyurethane and its auxiliary materials such as foaming agent. The injection mechanism is used to inject the slurry inside the mixing hot melt tank into the mold for foaming. The tumbling mixing mechanism is used to tumble and mix the materials inside the mixing hot melt tank. The gas-slurry mixture is convenient for better foaming in the later stage. The linkage mixing mechanism further improves the mixing efficiency.

[0027] 2. Multiple baffles are arranged in a trumpet shape, and their upper ends are connected by a torsion shaft and have a certain elasticity to facilitate their positioning. By pushing the adjusting screw downward, the adjusting screw pushes the adjusting ring downward. Since the adjusting ring is connected to the inner side of the baffle, the baffle can be pushed to expand outward to overcome the elastic effect of the torsion shaft. At this time, the nut is rotated upward so that the nut is connected to the lower part of the fixed ring, so that the gap between the baffle and the main material inlet pipe becomes larger, thereby increasing the leakage of auxiliary materials. The opposite adjustment process can reduce the leakage of auxiliary materials.

[0028] 3. The rotating power part can drive the driving shaft to rotate. Since the interior of the driving shaft is hollow and connected through the sealed bearing and the rotating joint, the gas from the external high-pressure gas source can enter the interior of the driving shaft through the air inlet pipe. The airflow can be sprayed through the ventilation stirring rod into the mixing hot melt tank to mix with the material. Secondly, it can be sprayed into the tumbling part to make the material inside the mixing hot melt tank tumble and mix. Thirdly, it can drive the linkage mixing mechanism to further mix the material.

[0029] 4. Driven by the drive shaft, the spoiler bowl rotates to drive the preliminarily mixed materials to form a swirl, further improving the mixing efficiency. By setting the nozzle, the airflow can be ejected from the pneumatic cavity and the nozzle, and the swirl of the spoiler further improves the mixing efficiency. The diverter column can divert the polyurethane force of the main material entering the pipe to facilitate mixing with the auxiliary material. The setting of the spoiler further improves the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0032] Figure 2 It is an enlarged structural schematic diagram of a feed premixing mechanism according to an embodiment of the present invention;

[0033] Figure 3 For the embodiment of the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0034] In the figure: 100, mold conveying frame; 200, mixing hot melt tank; 300, feed premixing mechanism; 310, main material inlet pipe; 320, auxiliary material funnel; 330, elastic lap-type feed chute; 331, torsion shaft; 332, baffle; 340, adjustment component; 341, adjustment ring; 342, leakage gap; 343, adjustment screw; 344, fixing ring; 345, nut; 400, discharge port; 500, injection mechanism; 600, tumbling mixing mechanism ; 610, driving cavity; 620, rotating power part; 630, driving shaft; 640, sealing bearing; 650, rotating joint; 660, air inlet pipe; 670, ventilation stirring rod; 671, air vent; 672, air outlet; 680, tumbling part; 700, linkage mixing mechanism; 710, pneumatic cavity; 720, elastic part; 730, pneumatic piston; 740, spoiler bowl; 750, oblique jet head; 760, diverter column; 770, spoiler. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1-Figure 3 As shown, the first aspect of this embodiment provides a preparation device for low-odor and high-support PU foam, including a mold conveying frame 100, a mixing hot melt tank 200 is provided on the upper part of the mold conveying frame 100, a feed premixing mechanism 300 is provided at the upper end of the mixing hot melt tank 200, a discharge port 400 is provided at the lower part of the mixing hot melt tank 200, an injection mechanism 500 is provided at the discharge port 400, a tumbling mixing mechanism 600 is provided inside the mixing hot melt tank 200, and the upper end of the tumbling mixing mechanism 600 is connected with the feed premixing mechanism 300 through a linkage mixing mechanism 700.

[0037] The basic principle of this embodiment is as follows: the mold conveying frame 100 is used to reciprocately convey the mold to be injected, the mixing hot melt tank 200 is used to melt the granular polyurethane and its auxiliary materials such as foaming agent, the injection mechanism 500 is used to inject the slurry inside the mixing hot melt tank 200 into the mold for foaming molding, the tumbling mixing mechanism 600 is used to tumble and mix the materials inside the mixing hot melt tank 200, and the gas-slurry mixture is convenient for better foaming in the later stage, and the linkage mixing mechanism 700 further improves the mixing efficiency.

[0038] In order to facilitate the cyclic conveying of the mold, the mold conveying frame 100 is a cyclic conveying frame, for example, it can be in the shape of a runway, and an injection mold is arranged on the upper part of the cyclic conveying frame. The injection mold can reciprocate on the conveying frame for injection molding.

[0039] In order to achieve preliminary mixing of materials, the feed premixing mechanism 300 in this embodiment includes a main material inlet pipe 310 arranged on the upper part of the mixing hot melt tank 200, and an auxiliary material funnel 320 is provided on the peripheral side of the main material inlet pipe 310. The auxiliary material funnel 320 is coated on the peripheral side of the main material inlet pipe 310, and an elastic lap-type feed trough 330 is provided at its lower end. The bottom end of the elastic lap-type feed trough 330 is lower than the lower end of the main material inlet pipe 310, and also includes an adjustment component 340 arranged between the main material inlet pipe 310 and the auxiliary material funnel 320.

[0040] The main material inlet pipe 310 is used to transport polyurethane particles, the auxiliary material funnel 320 is used to store and input auxiliary materials such as foaming agents into the mixing hot melt tank 200, and the elastic lap-type feed chute 330 can adjust the gap between it and the main material inlet pipe 310 under the drive of the adjustment component 340, so as to facilitate the adjustment of the amount of auxiliary materials entering.

[0041] The elastic overlapping material discharge chute 330 includes a plurality of overlapping baffles 332 rotatably connected to the lower side of the auxiliary material funnel 320 through a torsion shaft 331, and the adjusting component 340 includes an adjusting ring 341 with a leakage hole slidably arranged on the main material inlet pipe 310, and the adjusting ring 341 is connected to the inner side of a plurality of the baffles 332, and a leakage gap 342 is arranged between the lower ends of a plurality of the baffles 332 and the outer wall of the main material inlet pipe 310, and an adjusting screw 343 is connected to the upper part of the adjusting ring 341, and the upper end of the adjusting screw 343 passes through a fixing ring 344 arranged at the upper end of the main material inlet pipe 310 and is fixed to the fixing ring 344 through a nut 345, and the nut 345 is attached to the lower side of the fixing ring 344.

[0042] A plurality of baffles 332 are arranged in a trumpet shape, and their upper ends are connected by a torsion shaft 331 and have a certain elasticity to facilitate their positioning. By pushing the adjusting screw 343 downward, the adjusting screw 343 pushes the adjusting ring 341 downward. Since the adjusting ring 341 is connected to the inner side of the baffle 332, the baffle 332 can be pushed to expand outward to overcome the elastic effect of the torsion shaft 331. At this time, the nut 345 is rotated upward so that the nut 345 is connected to the lower part of the fixing ring 344, so that the gap between the baffle 332 and the main material inlet pipe 310 becomes larger, thereby increasing the leakage of the auxiliary material. The opposite adjustment process can reduce the leakage of the auxiliary material.

[0043] The tumbling mixing mechanism 600 in this embodiment includes a driving cavity 610 arranged at the bottom of the mixing hot melt tank 200, and a rotating power part 620 is fixedly connected to the inside of the driving cavity 610. The rotating power part 620 is connected to an internal hollow driving shaft 630. The driving shaft 630 is located inside the mixing hot melt tank 200. The rotating power part 620 can be a servo motor. The driving shaft 630 is connected to an air inlet pipe 660 through a sealed bearing 640 and a rotary joint 650. The air inlet pipe 660 is connected to an external high-pressure air source. A plurality of ventilation and stirring rods 670 are connected to the driving shaft 630. The interior of the mixing hot melt tank 200 is provided with a tumbling part 680 connected to the end of the ventilation and stirring rod 670.

[0044] The rotating power part 620 can drive the driving shaft 630 to rotate. Since the interior of the driving shaft 630 is hollow and connected through the sealed bearing 640 and the rotating joint 650, the gas from the external high-pressure gas source can enter the interior of the driving shaft 630 through the air inlet pipe 660. The airflow can be sprayed through the ventilation stirring rod 670 into the mixing hot melt tank 200 to mix with the material. Secondly, it can be sprayed into the tumbling part 680 to make the material inside the mixing hot melt tank 200 tumble and mix. Thirdly, it can drive the linkage mixing mechanism 700 to further mix the material.

[0045] The outer wall of the ventilation stirring rod 670 is provided with a plurality of ventilation holes 671, and the end of the ventilation stirring rod 670 is provided with an air outlet hole 672. The tumbling piece 680 includes an arc-shaped baffle plate arranged on the inner wall of the mixing hot melt tank 200, and the air outlet hole 672 is located inside the arc-shaped baffle plate. The air flow can be sprayed into the mixing hot melt tank 200 through the air hole 671 to mix with the material, and can be sprayed into the tumbling piece 680 through the air outlet hole 672 to cause the material inside the mixing hot melt tank 200 to tumble, thereby improving the mixing efficiency.

[0046] The linkage mixing mechanism 700 in this embodiment includes a pneumatic component and a material disturbance component arranged at the top of the driving shaft 630. The pneumatic component can provide power for preliminary mixing of materials, and the material disturbance component is used to form a vortex during rotation to more fully mix the materials.

[0047] The pneumatic component includes a pneumatic cavity 710 with an opening facing upward and arranged at the top of the driving shaft 630. The top of the driving shaft 630 is connected to a pneumatic piston 730 via an elastic member 720. When the airflow reaches the pneumatic cavity 710 at the top of the driving shaft 630, it can push the pneumatic piston 730 to move upward, thereby connecting the driving shaft 630 with the pneumatic cavity 710.

[0048] The material disturbance component includes a spoiler bowl 740 arranged at the upper end of the pneumatic cavity 710, and the spoiler bowl 740 is provided with a plurality of oblique jet heads 750 connected to the pneumatic cavity 710. A diverter column 760 is provided in the middle of the spoiler bowl 740, and the top end of the diverter column 760 extends to the lower end of the main material inlet pipe 310, and a spoiler plate 770 is also provided on the upper part of the diverter column 760.

[0049] Driven by the drive shaft 630, the spoiler bowl 740 rotates to drive the preliminarily mixed materials to form a vortex, further improving the mixing efficiency. By setting a nozzle, the airflow can be ejected from the pneumatic cavity 710 and the nozzle, and the vortex material further improves the mixing efficiency. The diverter column 760 can divert the polyurethane force of the main material entering the tube 310 to facilitate mixing with the auxiliary material. The setting of the spoiler 770 further improves the mixing effect.

[0050] A second aspect of the present embodiment provides a method for preparing low-odor high-support PU using the above-mentioned preparation equipment, comprising the following steps:

[0051] The mold conveying frame 100 reciprocates to convey the mold, and the polyurethane particles and auxiliary materials are preliminarily mixed through the feeding premixing mechanism 300, and then further mixed through the linkage mixing mechanism 700, and swirl into the mixing hot melt tank 200, where they are hot-melted and fully mixed through the tumbling mixing mechanism 600, and then injected into the mold by the injection mechanism 500 for foaming molding.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation device for low-odor high-support PU foam, characterized in that: The invention comprises a mold conveying frame (100), wherein a mixing hot melt tank (200) is provided at the upper part of the mold conveying frame (100), a feed premixing mechanism (300) is provided at the upper end of the mixing hot melt tank (200), a discharge port (400) is provided at the lower part of the mixing hot melt tank (200), a material injection mechanism (500) is provided at the discharge port (400), a tumbling mixing mechanism (600) is provided inside the mixing hot melt tank (200), and the upper end of the tumbling mixing mechanism (600) is connected to the feed premixing mechanism (300) via a linkage mixing mechanism (700); The feed premixing mechanism (300) comprises a main material inlet pipe (310) arranged at the upper part of the mixing hot melt tank (200), an auxiliary material funnel (320) is arranged on the peripheral side of the main material inlet pipe (310), the auxiliary material funnel (320) is coated on the peripheral side of the main material inlet pipe (310), and an elastic overlapping material discharge trough (330) is arranged at the lower end of the auxiliary material funnel (320), the bottom end of the elastic overlapping material discharge trough (330) is lower than the lower end of the main material inlet pipe (310), and also comprises an adjustment component (340) arranged between the main material inlet pipe (310) and the auxiliary material funnel (320); The tumbling mixing mechanism (600) comprises a driving cavity (610) arranged at the bottom of the mixing hot melt tank (200), a rotating power member (620) being fixedly connected inside the driving cavity (610), the rotating power member (620) being connected to an internally hollow driving shaft (630), the driving shaft (630) being connected to an air intake pipe (660) via a sealing bearing (640) and a rotary joint (650), the air intake pipe (660) being connected to an external high-pressure air source, the driving shaft (630) being connected to a plurality of ventilation stirring rods (670), and a tumbling member (680) being connected to the ends of the ventilation stirring rods (670) being provided inside the mixing hot melt tank (200); The outer wall of the ventilation stirring rod (670) is provided with a plurality of ventilation holes (671), and the end of the ventilation stirring rod (670) is provided with an air outlet hole (672), and the tumbling member (680) comprises an arc-shaped baffle plate arranged on the inner wall of the mixing hot melting tank (200), and the air outlet hole (672) is located inside the arc-shaped baffle plate; The linked material mixing mechanism (700) comprises a pneumatic component and a material disturbing component arranged at the top end of the driving shaft (630).

2. The low-odor high-support PU foaming preparation equipment according to claim 1, characterized in that: The mold conveying frame (100) is a circulating conveying frame, and an injection mold is arranged on the upper part of the circulating conveying frame.

3. The low-odor high-support PU foaming preparation equipment according to claim 1, characterized in that: The elastic overlapping material discharge chute (330) comprises a plurality of mutually overlapping baffles (332) rotatably connected to the lower side of the auxiliary material hopper (320) via a torsion shaft (331); the adjusting assembly (340) comprises an adjusting ring (341) having a leakage hole and slidably arranged on the main material inlet pipe (310); the adjusting ring (341) is connected to the inner sides of the plurality of baffles (332); a material leakage gap (342) is arranged between the lower ends of the plurality of baffles (332) and the outer wall of the main material inlet pipe (310); an adjusting screw (343) is connected to the upper part of the adjusting ring (341); the upper end of the adjusting screw (343) passes through a fixing ring (344) arranged at the upper end of the main material inlet pipe (310) and is fixed to the fixing ring (344) via a nut (345); the nut (345) is attached to the lower side of the fixing ring (344).

4. The low-odor high-support PU foaming preparation equipment according to claim 1, characterized in that: The pneumatic assembly comprises a pneumatic cavity (710) which is arranged at the top end of a driving shaft (630) and opens upward, and the top end of the driving shaft (630) is connected to a pneumatic piston (730) via an elastic member (720).

5. The low-odor high-support PU foaming preparation equipment according to claim 1, characterized in that: The material disturbance component comprises a flow disturbance bowl (740) arranged at the upper end of the pneumatic cavity (710), the flow disturbance bowl (740) is provided with a plurality of oblique jet heads (750) connected to the pneumatic cavity (710), a diverter column (760) is provided in the middle of the flow disturbance bowl (740), the top end of the diverter column (760) extends to the lower end of the main material inlet pipe (310), and a flow disturbance sheet (770) is also provided on the upper part of the diverter column (760).

6. A method for preparing low-odor high-support PU using the preparation equipment according to any one of claims 1 to 5, characterized in that: The following steps are involved: The mold conveying frame (100) reciprocates to convey the mold, and the polyurethane particles and auxiliary materials are preliminarily mixed through the feeding premixing mechanism (300), and then further mixed through the linkage mixing mechanism (700) and swirled into the mixing hot melt tank (200), where they are hot melted in the mixing hot melt tank (200) and fully mixed through the tumbling mixing mechanism (600), and then injected into the mold by the injection mechanism (500) for foaming and molding.

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