Polyurethane foaming equipment and foaming process

Abstract

The invention discloses polyurethane foaming equipment, and relates to the technical field of polyurethane foaming, the polyurethane foaming equipment comprises a main body mechanism, blade mechanisms, a supporting shaft and a supporting cylinder, the supporting shaft and the supporting cylinder are rotatably mounted in a foaming cylinder, a plurality of groups of camshafts are uniformly and rotatably mounted on a chassis of the supporting shaft, and one group of camshafts corresponds to one group of blade mechanisms; the sliding block is installed on a circulating groove of the cam shaft in a sliding mode, the air inlet pipe of the blade is installed on the sliding block in a rotating mode, the air inlet pipe is installed on a rectangular groove of the supporting cylinder in a sliding mode, the supporting shaft rotates to drive the blade mechanism to revolve, and the cam shaft rotates to drive the blade mechanism to longitudinally slide on the rectangular groove and rotate. A plurality of groups of one-way valve assemblies are arranged on exhaust holes of the blades, and an air extracting pump on the annular air pipe outputs air above the foaming cylinder from the one-way valve assemblies through the contraction ventilation pipe and the blades. The foaming efficiency and the foaming effect of the polyurethane foaming raw material can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane foaming, and in particular to polyurethane foaming equipment and a foaming process. Background Art

[0002] Polyurethane foaming equipment is an industrial equipment used to produce polyurethane foam materials. Polyurethane foam is widely used in many fields such as heat insulation, sound insulation, packaging, automobiles, home appliances, construction, etc. The basic principle of polyurethane foaming is to chemically react raw materials such as polyols and isocyanates, and generate gas through the action of foaming agents (such as water) and catalysts to form a foam structure.

[0003] During the use of existing polyurethane foaming raw materials, there is either insufficient gas inside the foaming equipment when mixing the polyurethane foaming raw materials, or the gas generated during the foaming process gathers above the polyurethane foaming raw materials, making it difficult for the polyurethane foaming raw materials to fully foam; at the same time, due to the fast reaction speed of the polyurethane foaming raw materials, the mixing and foaming mechanism inside the traditional polyurethane foaming equipment is prone to uneven mixing of the polyurethane foaming raw materials, resulting in insufficient foaming of the polyurethane foaming raw materials and the generation of mixtures with different reaction degrees, which not only affects the foaming efficiency of the polyurethane foaming raw materials, but also affects the foaming effect; therefore, a polyurethane foaming equipment is urgently needed. Summary of the invention

[0004] In view of the above technical problems, the technical solution adopted by the present invention is: a polyurethane foaming device, including a main body mechanism and a blade mechanism, the main body mechanism includes a foaming cylinder and a support shaft, a top cover is arranged above the foaming cylinder, a closed space is formed between the foaming cylinder and the top cover, the support shaft is coaxial with the foaming cylinder, the support shaft is rotatably installed inside the foaming cylinder, a support cylinder is fixedly installed outside the support shaft, multiple groups of camshafts are evenly rotatably installed on the chassis at the bottom of the support shaft, the camshafts are arranged inside the support cylinder, one group of camshafts corresponds to one group of blade mechanisms, the blade mechanism includes a slider and a blade, the slider is slidably installed on the circulation groove of the camshaft, the intake pipe on the blade is rotatably installed on the slider, and the blade The intake pipe is slidably installed on the rectangular groove of the support tube, and the support shaft drives the blade mechanism to revolve when it rotates. When the camshaft rotates, it drives the blade mechanism to slide longitudinally and rotate on the rectangular groove. A circulation mechanism is arranged between the blade mechanisms, and the circulation mechanism includes an annular air pipe and multiple groups of contraction ventilation pipes. One group of contraction ventilation pipes corresponds to one group of blade mechanisms. The end of the contraction ventilation pipe is tightly connected with the annular air pipe, and the bottom of the contraction ventilation pipe is tightly connected with the intake pipe rotation. Multiple groups of one-way valve assemblies are arranged on the exhaust holes of the blades. The vacuum pump on the annular air pipe outputs the gas above the foaming tube from the one-way valve assembly through the contraction ventilation pipe and the blades. A sealing mechanism is arranged between the intake pipe of each group of blades and the support tube.

[0005] Furthermore, the sealing mechanism includes a sealing plate and a sealing block. The sealing plate is fixedly mounted on the support tube, the sealing block is axially slidably mounted on the support tube, the sealing block is arranged on the sealing plate, the sealing plate is a telescopic component, the sealing plate and the sealing block seal the rectangular groove of the support tube, and the sealing block is rotatably mounted between the air intake pipe of the corresponding blade. When the blade mechanism slides on the rectangular groove, it drives the sealing block to slide axially on the support tube, and the sealing block drives the sealing plate to extend and retract. During this process, the sealing plate and the sealing block seal the rectangular groove, and the interior of the support tube is in a sealed state, preventing the polyurethane foaming raw material from entering the interior of the support tube, affecting the operation of the internal mechanism of the support tube, and avoiding the waste of the polyurethane foaming raw material.

[0006] Furthermore, one group of the blade mechanisms corresponds to a group of transposition mechanisms, the transposition mechanism includes a transposition gear, a top plate is arranged above the support shaft, the top of the camshaft passes through the top plate and is rotatably mounted on the top plate, the transposition gear is fixedly mounted on the top of the camshaft, an internal gear ring is fixedly mounted above the top cover, and the transposition gear meshes with the internal gear ring. When the support shaft rotates, the camshaft is driven to orbit, and when the camshaft orbits, the camshaft is driven to rotate under the meshing action of the transposition gear and the internal gear ring. When the camshaft rotates, the contraction vent pipe and the camshaft rotate in coordination; when the camshaft rotates, under the action of the circulation groove, the slider is driven to slide on the circulation groove, and the slider drives the blade to slide longitudinally on the rectangular groove of the support tube.

[0007] Furthermore, the shifting mechanism also includes a rotating assembly, one set of blades corresponds to one set of rotating assemblies, and the rotating assembly includes a rotating gear and a rack, the air intake pipe of the blade on the rotating gear is fixedly installed, the rack is longitudinally fixedly installed inside the support tube, and the rotating gear is meshed with the rack. When the camshaft rotates, the driving blade slides longitudinally on the rectangular groove of the support tube, and under the meshing action of the rotating gear and the rack, the rotating gear is driven to rotate, and the rotating gear drives the blade to rotate through the air intake pipe. When the blade rotates, the polyurethane foaming raw materials inside the foaming tube are fully mixed, thereby improving the efficiency and effect of the polyurethane foaming raw materials.

[0008] Furthermore, a trachea bracket is rotatably mounted above the support shaft, the trachea bracket is arranged above the top plate, the annular trachea is rotatably mounted on the trachea bracket, the interior of the camshaft is a hollow structure, and the middle part of the contraction vent pipe is rotatably mounted inside the camshaft. Polyurethane foaming needs to be carried out in a closed space. When the blades of the blade mechanism slide and rotate longitudinally on the rectangular groove of the support tube, the contraction vent pipe deforms to adapt to the position of the blades. The contraction vent pipe ensures a stable connection between the annular trachea and the blades, improves the contact efficiency between the gas required for polyurethane foaming and the interior of the polyurethane foaming raw material, and improves the molding effect of polyurethane foaming.

[0009] Furthermore, the interior of the blade is a hollow structure, a feed inlet is provided above the top cover, a motor is fixedly installed on the top cover, and the output shaft of the motor is fixedly installed with the support shaft. The motor drives the support shaft to rotate, and the polyurethane foaming raw materials enter the foaming cylinder from the feed inlet for mixing. During the mixing process of the polyurethane foaming raw materials, the polyurethane foam begins to expand, generates gas and begins to form a foam structure. The gas emerges from the mixed raw materials and gathers above the inside of the foaming cylinder. The annular air pipe uses a vacuum pump to draw the gas above the inside of the foaming cylinder into the annular air pipe, and transports it to its corresponding air inlet pipe through the contraction ventilation pipe. The gas enters the inside of the blade, and the pressure inside the blade increases.

[0010] Furthermore, the one-way valve assembly includes a blocking disk and a round table. A piston is fixedly mounted on the blocking disk. The piston is slidably mounted inside the exhaust hole. The piston and the exhaust hole are in close contact. The round table is arranged inside the exhaust hole. The bottom of the round table is fixedly mounted with the piston. A round rod is fixedly mounted on the top of the round table. A tail plate is fixedly mounted on the tail of the round rod. A spring is arranged between the tail plate and the inside of the blade. When the pressure inside the blade increases, the tail plate is squeezed, the spring is compressed, and the tail plate drives the round table to slide outside the exhaust hole through the round rod, disconnecting the close contact between the piston and the exhaust hole. The gas inside the blade is discharged from the exhaust hole and further contacts with the mixed raw materials inside the foaming cylinder, thereby improving the efficiency and foaming effect of the polyurethane foaming raw materials. When the gas supply inside the blade is disconnected, the pressure inside the blade decreases, and the spring returns to the initial position. The tail plate drives the round table, the piston, and the blocking disk to move inside the exhaust hole through the round rod. The exhaust hole squeezes the polyurethane foaming raw materials around the piston. The blocking disk assists the piston to further seal the exhaust hole, and the blocking disk prevents the polyurethane foaming raw materials from blocking the exhaust hole.

[0011] Furthermore, the radius of the blocking disk is R, the radius of the piston is r, the radius of the bottom of the cone is equal to the radius of the piston, the radius of the piston is equal to the radius of the exhaust hole, and the radius of the top of the cone is d, d<r<R.

[0012] The present invention also discloses a polyurethane foaming process, which uses the above-mentioned polyurethane foaming equipment and specifically comprises the following steps: Step 1: Start the motor, the motor drives the support shaft and the support cylinder to rotate, and the rotation of the support cylinder drives the blade mechanism to revolve; under the meshing action of the internal gear ring and the transposition gear, the transposition gear is driven to drive the camshaft to rotate, so that the slider of the blade mechanism slides on the circulation groove, thereby driving the blade mechanism to move longitudinally on the rectangular groove of the support cylinder; Step 2: When the blade mechanism moves longitudinally on the rectangular groove under the driving force of the rotating assembly, the blades of the blade mechanism rotate on their own; Step 3: Inject the polyurethane foaming raw material into the foaming cylinder in proportion from the inlet of the top cover. During this process, the foaming cylinder and the top cover are in a closed environment, and multiple sets of blade mechanisms slide and revolve on the rectangular grooves. At the same time, the blades of the blade mechanism rotate on their own to fully mix the polyurethane foaming raw material. Step 4: During the foaming process of the polyurethane foaming raw material, gas is generated and a foam structure begins to form. The gas emerges from the mixed raw material and gathers above the foaming tube. The air pump on the annular air pipe is started to transport the gas to the inside of the blade through the contraction vent pipe and the air inlet pipe, and the pressure inside the blade increases. Step 5: The gas squeezes the tail plate, the spring is compressed, and the tail plate drives the round table to slide to the outside of the exhaust hole through the round rod, breaking the close contact between the piston and the exhaust hole. The gas inside the blade is discharged from the exhaust hole and further contacts with the mixed raw materials inside the foaming tube, so that the polyurethane foaming raw materials are fully foamed.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) the present invention is provided with a transposition mechanism and a blade mechanism. While the support shaft drives the blade structure to revolve to stir and mix the polyurethane foaming raw materials, the camshaft and the rotating assembly are used to make the blade mechanism rotate and move longitudinally, thereby further improving the mixing efficiency and mixing effect of the polyurethane foaming raw materials, thereby improving the foaming efficiency and foaming effect; (2) the present invention is provided with a main body mechanism and a sealing mechanism, thereby ensuring a closed environment required for foaming. While promoting the full mixing of the polyurethane foaming raw materials, the mixed raw materials and the transposition mechanism are isolated, thereby ensuring the stable progress of the foaming process, while avoiding the waste of raw materials and saving costs; (3) the present invention is provided with a circulation mechanism, thereby repeatedly replenishing the gas generated during the foaming process into the polyurethane foaming raw materials. During the foaming process, the gas required for foaming can also be provided to the inside of the foaming cylinder through the annular air pipe, thereby providing a closed environment required for foaming, ensuring the stable progress of the foaming process, and improving the foaming efficiency and foaming effect of the polyurethane foaming raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the first viewing angle of the overall structure of the present invention.

[0015] Figure 2 It is the front view of the present invention.

[0016] Figure 3 for Figure 2 Cross-section view along the AA direction.

[0017] Figure 4 for Figure 2 Cross-sectional view along the BB direction.

[0018] Figure 5 for Figure 2 Cross-sectional view along the CC direction.

[0019] Figure 6 It is a schematic diagram of the transposition mechanism and the blade mechanism of the present invention.

[0020] Figure 7 It is a front view of the blade mechanism of the present invention.

[0021] Figure 8 for Figure 7 Cross-sectional view along the DD direction.

[0022] Fig. 9 for Figure 3 A partial enlarged view of part E in the middle.

[0023] Fig.10 for Figure 4 A partial enlarged view of part F.

[0024] Fig.11 for Figure 5 A partial enlarged view of part G in the middle.

[0025] Fig.12 for Figure 6 A partial enlarged view of part H in the middle.

[0026] Fig.13 for Figure 8 A partial enlarged view of part I.

[0027] Figure markings: 11-foaming cylinder; 12-top cover; 13-motor; 14-feeding port; 15-support shaft; 16-support cylinder; 17-inner gear ring; 151-chassis; 152-top plate; 21-sealing plate; 22-sealing block; 31-camshaft; 32-rotating assembly; 33-transposition gear; 311-circulation groove; 321-rotating gear; 322-rack; 41-slider; 42-vane; 43-check valve assembly; 421-inlet pipe; 422-exhaust hole; 431-blocking disk; 432-piston; 433-cone; 434-round rod; 435-tail plate; 44-spring; 51-annular air pipe; 52-contraction ventilation pipe; 53-trachea bracket. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] Example: Figure 1-Figure 13The polyurethane foaming device shown in the figure includes a main body mechanism and a blade mechanism, wherein the main body mechanism includes a foaming cylinder 11 and a support shaft 15, a top cover 12 is arranged above the foaming cylinder 11, and a closed space is formed between the foaming cylinder 11 and the top cover 12, the support shaft 15 is coaxial with the foaming cylinder 11, the support shaft 15 is rotatably installed inside the foaming cylinder 11, a support cylinder 16 is fixedly installed outside the support shaft 15, and multiple groups of camshafts 31 are evenly rotatably installed on a chassis 151 at the bottom of the support shaft 15, the camshafts 31 are arranged inside the support cylinder 16, and one group of camshafts 31 corresponds to one group of blade mechanisms, and the blade mechanism includes a slider 41 and a blade 42, the slider 41 is slidably installed on the circulation groove 311 of the camshaft 31, the air inlet pipe 421 on the blade 42 is rotatably installed on the slider 41, and the air inlet pipe 421 on the blade 42 21 is slidably installed on the rectangular groove of the support tube 16, and the support shaft 15 drives the blade mechanism to revolve when it rotates. When the camshaft 31 rotates, it drives the blade mechanism to slide longitudinally and rotate on the rectangular groove. A circulation mechanism is arranged between the blade mechanisms, and the circulation mechanism includes an annular air pipe 51 and multiple groups of contraction vent pipes 52. One group of contraction vent pipes 52 corresponds to one group of blade mechanisms. The end of the contraction vent pipe 52 is tightly connected to the annular air pipe 51, and the bottom of the contraction vent pipe 52 is tightly connected to the intake pipe 421 for rotation. Multiple groups of one-way valve assemblies 43 are arranged on the exhaust holes 422 of the blades 42. The vacuum pump on the annular air pipe 51 outputs the gas above the foaming tube 11 from the one-way valve assembly 43 through the contraction vent pipe 52 and the blades 42. A sealing mechanism is arranged between the intake pipe 421 of each group of blades 42 and the support tube 16.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig. 9 , Fig.11As shown, the main mechanism includes a foaming cylinder 11, a top cover 12, a motor 13, a feed port 14, a support shaft 15, a support cylinder 16, and an inner gear ring 17. The top cover 12 is fixedly installed above the foaming cylinder 11, and a closed space is formed between the foaming cylinder 11 and the top cover 12. The feed port 14 is arranged above the top cover 12. The polyurethane foaming raw materials enter the foaming cylinder 11 from the feed port 14 and are mixed. When the polyurethane foaming raw materials are mixed, the foaming cylinder 11 and the top cover 12 are a closed space. Gas is generated during the foaming process of the polyurethane foaming raw materials, and a foam structure begins to be generated. The gas emerges from the mixed raw materials and gathers in the foaming cylinder 11. Above; the motor 13 is fixedly installed above the top cover 12, the output shaft of the motor 13 is fixedly installed with the support shaft 15, the motor 13 drives the support shaft 15 to rotate, the support shaft 15 is coaxial with the foaming tube 11, the support shaft 15 is rotatably installed inside the foaming tube 11, the support shaft 15 is coaxial with the support tube 16, the outside of the support shaft 15 is fixedly installed with the support tube 16, and when the support shaft 15 rotates, it drives the support tube 16 to rotate; the inner gear ring 17 is coaxial with the top cover 12, the inner gear ring 17 is fixedly installed with the top cover 12, a bottom plate 151 is provided at the bottom of the support shaft 15, and a top plate 152 is provided above the support shaft 15.

[0031] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 As shown, there are multiple groups of transposition mechanisms and blade mechanisms respectively, one group of transposition mechanisms corresponds to one group of blade mechanisms, and the transposition mechanisms are evenly arranged on the chassis 151 of the support shaft 15. The transposition mechanism includes a camshaft 31, a rotating assembly 32, and a transposition gear 33. The bottom of the camshaft 31 is rotatably mounted on the chassis 151 of the support shaft 15, and the top of the camshaft 31 passes through the top plate 152 and is rotatably mounted on the top plate 152. The transposition gear 33 is arranged above the top plate 152, and the transposition gear 33 is fixedly mounted on the end of the camshaft 31. The transposition gear 33 is meshed with the internal gear ring 17. When the chassis 151 drives the camshaft 31 to revolve, under the meshing action of the internal gear ring 17 and the transposition gear 33, the transposition gear 33 drives the camshaft 31 to rotate. A circulation groove 311 is arranged on the camshaft 31, and the interior of the camshaft 31 is a hollow structure. The rotating assembly 32 is arranged between the support cylinder 16 and the intake pipe 421 of the blade 42 of the blade mechanism.

[0032] like Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.11As shown, the blade mechanism includes a slider 41, a blade 42, a one-way valve assembly 43, and a spring 44. The slider 41 is slidably mounted on the circulation groove 311 of the camshaft 31. An intake pipe 421 is provided on the blade 42. The blade 42 is rotatably mounted on the slider 41 through the intake pipe 421. The intake pipe 421 of the blade 42 passes through the circulation groove 311 and enters the interior of the camshaft 31. It is tightly rotatably connected to the bottom of the corresponding contraction vent pipe 52. The intake pipe 421 of the blade 42 is slidably and rotatably mounted on the rectangular groove of the support tube 16. When the support shaft 15 and the support tube 16 rotate, the blade 42 is driven to revolve. When the camshaft 31 rotates, the slider 41 is driven to slide on the circulation groove 311. The slider 41 drives the blade 42 in the rectangular groove. The rotating assembly 32 includes a rotating gear 321 and a rack 322. The rotating gear 321 is coaxial with the air inlet pipe 421 of the blade 42. The air inlet pipe 421 and the rotating gear 321 are fixedly installed. The rack 322 is longitudinally fixedly installed inside the support tube 16. The rotating gear 321 is meshed with the rack 322. When the blade 42 slides longitudinally on the rectangular groove, the rotating gear 321 is driven to move. Under the meshing action of the rotating gear 321 and the rack 322, the rotating gear 321 is driven to rotate through the air inlet pipe 421 to drive the blade 42 to rotate, so that the blade 42 rotates. When the blade 42 rotates, the polyurethane foaming raw material inside the foaming tube 11 is fully mixed, thereby improving the efficiency and effect of the polyurethane foaming raw material.

[0033] like Figure 2 , Figure 3 , Figure 4 , Figure 6 , Fig.10 , Fig.11 , Fig.12 As shown, a group of sealing mechanisms corresponds to a group of blade mechanisms, and the sealing mechanisms include a sealing plate 21 and a sealing block 22. The sealing plate 21 is fixedly mounted on the support tube 16, and the sealing block 22 is axially slidably mounted on the support tube 16. The sealing block 22 is arranged on the sealing plate 21, and the sealing plate 21 is a telescopic component. The sealing plate 21 and the sealing block 22 seal the rectangular groove of the support tube 16, and the corresponding air intake pipe 421 of the blade 42 is rotatably mounted on the sealing block 22. When the blade mechanism slides on the rectangular groove, it drives the sealing block 22 to slide axially on the support tube 16, and the sealing block 22 drives the sealing plate 21 to retract. In this process, the sealing plate 21 and the sealing block 22 seal the rectangular groove, and the interior of the support tube 16 is in a sealed state, thereby preventing the polyurethane foaming raw materials from entering the interior of the support tube 16, affecting the operation of the internal mechanism of the support tube 16, and avoiding the waste of the polyurethane foaming raw materials.

[0034] like Figure 2 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 , Fig.10As shown, the circulation mechanism is arranged between multiple groups of blade mechanisms, the interior of the blade 42 is a hollow structure, the circulation mechanism includes an annular air pipe 51, a contraction vent pipe 52, and an air pipe bracket 53, the air pipe bracket 53 is rotatably mounted on the support shaft 15, the air pipe bracket 53 is arranged above the top plate 152, the annular air pipe 51 is rotatably mounted on the air pipe bracket 53, there are multiple groups of contraction vent pipes 52, one group of contraction vent pipes 52 corresponds to one group of blade mechanisms, the end of the contraction vent pipe 52 is tightly connected to the annular air pipe 51, the bottom of the contraction vent pipe 52 is rotatably connected to the intake pipe 421 of the corresponding blade mechanism, the middle part of the contraction vent pipe 52 is rotatably mounted inside the camshaft 31, an air pump is arranged on the annular air pipe 51, and polyurethane foaming During the foaming process of the raw materials, gas is generated and a foam structure begins to form. The gas emerges from the mixed raw materials and gathers above the foaming tube 11. The annular air pipe 51 uses a vacuum pump to draw the gas above the inside of the foaming tube 11 into the annular air pipe 51 and transports it to its corresponding air inlet pipe 421 through the contraction vent pipe 52. The gas enters the inside of the blade 42, and the pressure inside the blade 42 increases. When the blade 42 slides on the rectangular groove of the support tube 16, the contraction vent pipe 52 is deformed to adapt to the position of the blade 42. When the support shaft 15 drives the blade mechanism to revolve, the camshaft 31 drives the contraction vent pipe 52 to move, and the annular air pipe 51 rotates on the air pipe bracket 53 to adapt to the position of the contraction vent pipe 52.

[0035] like Figure 6 , Figure 7 , Figure 8 , Fig.12 , Fig.13As shown, a plurality of exhaust holes 422 are provided on the blade 42, and a group of exhaust holes 422 corresponds to a group of one-way valve components 43. The one-way valve components 43 include a blocking disk 431, a piston 432, a frustum 433, a round rod 434, and a tail plate 435. The radius of the blocking disk 431 is R, the radius of the piston 432 is r, the radius of the bottom of the frustum 433 is equal to the radius of the piston 432, the radius of the piston 432 is equal to the radius of the exhaust hole 422, and the radius of the top of the frustum 433 is d, d<r<R; blocking disk 431 is fixedly installed with piston 432, piston 432 is slidably installed in exhaust hole 422, piston 432 and exhaust hole 422 are in close contact, round table 433 is arranged in exhaust hole 422, the bottom of round table 433 is fixedly installed with piston 432, the top of round table 433 is fixedly installed with round rod 434, the tail of round rod 434 is fixedly installed with tail plate 435, spring 44 is arranged in tail plate 435 and inside blade 42, spring The spring 44 is slidably mounted on the round rod 434; after the pressure inside the blade 42 increases, the tail plate 435 is squeezed, the spring 44 is compressed, and the tail plate 435 drives the round table 433 to slide to the outside of the exhaust hole 422 through the 3-way valve assembly 43, disconnecting the close contact between the piston 432 and the exhaust hole 422, and the gas inside the blade 42 is discharged from the exhaust hole 422, and further contacts with the mixed raw materials inside the foaming tube 11, thereby improving the foaming efficiency and foaming effect of the polyurethane foaming raw materials; the gas replenishment inside the blade 42 is disconnected, the internal pressure of the blade 42 is reduced, and the spring 44 returns to its initial position, and the tail plate 435 drives the round table 433, the piston 432, and the blocking disk 431 to move to the inside of the exhaust hole 422 through the round rod 434, and the exhaust hole 422 squeezes the polyurethane foaming raw material around the piston 432, and the blocking disk 431 assists the piston 432 to further seal the exhaust hole 422, and the blocking disk 431 prevents the polyurethane foaming raw material from blocking the exhaust hole 422.

[0036] A polyurethane foaming process, using the above-mentioned polyurethane foaming equipment, specifically comprises the following steps: Step 1: Start the motor 13, the motor 13 drives the support shaft 15 and the support cylinder 16 to rotate, and the support cylinder 16 drives the blade mechanism to revolve when rotating; under the meshing action of the inner gear ring 17 and the transposition gear 33, the transposition gear 33 drives the cam shaft 31 to rotate, so that the slider 41 of the blade mechanism slides on the circulation groove 311, thereby driving the blade mechanism to move longitudinally on the rectangular groove of the support cylinder 16; Step 2: When the blade mechanism moves longitudinally on the rectangular groove under the driving force of the rotating assembly 32, the blade 42 of the blade mechanism rotates; Step 3: Inject the polyurethane foaming raw material into the foaming cylinder 11 from the feed port 14 of the top cover 12 in proportion. During this process, the foaming cylinder 11 and the top cover 12 are in a closed environment, and multiple sets of blade mechanisms slide and revolve on the rectangular grooves. At the same time, the blades 42 of the blade mechanism rotate on their own to fully mix the polyurethane foaming raw material. Step 4: During the foaming process of the polyurethane foaming raw material, gas is generated and a foam structure begins to be generated. The gas emerges from the mixed raw material and gathers above the foaming tube 11. The air pump on the annular air pipe 51 is started to transport the gas to the inside of the blade 42 through the contraction vent pipe 52 and the air inlet pipe 421, and the pressure inside the blade 42 increases. Step 5: The gas squeezes the tail plate 435, the spring 44 is compressed, and the tail plate 435 drives the round table 433 to slide to the outside of the exhaust hole 422 through the 3-way valve assembly 43, disconnecting the close contact between the piston 432 and the exhaust hole 422, and the gas inside the blade 42 is discharged from the exhaust hole 422, and further contacts with the mixed raw materials inside the foaming tube 11, so that the polyurethane foaming raw materials are fully foamed.

[0037] Working principle: start the motor 13, the motor 13 drives the support shaft 15 and the support cylinder 16 to rotate, and the support cylinder 16 drives the blade mechanism to revolve; under the meshing action of the inner gear ring 17 and the transposition gear 33, the transposition gear 33 is driven to drive the camshaft 31 to rotate, and when the support shaft 15 and the support cylinder 16 rotate, the blade 42 is driven to revolve, and when the camshaft 31 rotates, the slider 41 is driven to slide on the circulation groove 311, and the slider 41 drives the blade 42 to slide longitudinally on the rectangular groove; when the blade 42 slides longitudinally on the rectangular groove, it drives the rotating gear 321 to move, and under the meshing action of the rotating gear 321 and the rack 322, the rotating gear 321 is driven to pass through the intake pipe 42 1 drives the blade 42 to rotate, so that the blade 42 rotates. When the blade 42 rotates, the polyurethane foaming raw material inside the foaming tube 11 is fully mixed to improve the efficiency and effect of the polyurethane foaming raw material. In this process, the camshaft 31 drives the shrinking vent pipe 52 to displace, and the annular vent pipe 51 rotates on the vent pipe bracket 53 to adapt to the position of the shrinking vent pipe 52. When the blade 42 slides on the rectangular groove of the support tube 16, the shrinking vent pipe 52 is deformed to adapt to the position of the blade 42. When the support shaft 15 drives the blade mechanism to revolve, the camshaft 31 drives the shrinking vent pipe 52 to displace, and the annular vent pipe 51 rotates on the vent pipe bracket 53 to adapt to the position of the shrinking vent pipe 52.

[0038] When the blade mechanism slides on the rectangular groove, it drives the sealing block 22 to slide axially on the support tube 16, and the sealing block 22 drives the sealing plate 21 to extend and retract. During this process, the sealing plate 21 and the sealing block 22 seal the rectangular groove, and the interior of the support tube 16 is in a sealed state, preventing the polyurethane foaming raw material from entering the interior of the support tube 16 and affecting the operation of the internal mechanism of the support tube 16, thereby avoiding the waste of the polyurethane foaming raw material.

[0039] The polyurethane foaming raw material is injected into the foaming cylinder 11 in proportion from the feed port 14 of the top cover 12. During this process, the foaming cylinder 11 and the top cover 12 are in a closed environment, and multiple sets of blade mechanisms slide and revolve on the rectangular grooves. At the same time, the blades 42 of the blade mechanisms rotate on themselves to fully mix the polyurethane foaming raw materials. Gas is generated during the foaming process of the polyurethane foaming raw materials, and a foam structure begins to form. The gas emerges from the mixed raw materials and gathers above the foaming cylinder 11.

[0040] The suction pump on the annular air pipe 51 is started. The annular air pipe 51 draws the gas above the inside of the foam tube 11 into the annular air pipe 51 through the suction pump, and transports it to the corresponding air inlet pipe 421 through the contraction vent pipe 52. The gas enters the inside of the blade 42, and the pressure inside the blade 42 increases. When the blade 42 slides on the rectangular groove of the support tube 16, the contraction vent pipe 52 is deformed to adapt to the position of the blade 42; after the pressure inside the blade 42 increases, the tail plate 435 is squeezed, the spring 44 is compressed, and the tail plate 435 drives the round table 433 to slide to the outside of the exhaust hole 422 through the 3-way valve assembly 43, disconnecting the tight connection between the piston 432 and the exhaust hole 422. The gas inside the blade 42 is in close contact, and the gas inside the blade 42 is discharged from the exhaust hole 422, and further contacts with the mixed raw materials inside the foaming tube 11, so as to improve the foaming efficiency and foaming effect of the polyurethane foaming raw materials; the gas supply to the inside of the blade 42 is disconnected, the pressure inside the blade 42 is reduced, and the spring 44 returns to its initial position. The tail plate 435 drives the round table 433, the piston 432, and the blocking disk 431 to move toward the exhaust hole 422 through the round rod 434. The exhaust hole 422 squeezes the polyurethane foaming raw materials around the piston 432, and the blocking disk 431 assists the piston 432 to further seal the exhaust hole 422, and the blocking disk 431 prevents the polyurethane foaming raw materials from blocking the exhaust hole 422.

[0041] During the foaming process, the gas required for foaming can also be provided to the inside of the foaming tube 11 through the annular air pipe 51, while providing a closed environment required for foaming, ensuring the stability of the foaming process and improving the foaming efficiency and foaming effect of the polyurethane foaming raw material.

[0042] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A polyurethane foaming device, comprising a main body mechanism and a blade mechanism, characterized in that: The main body mechanism comprises a foaming cylinder (11) and a support shaft (15). A top cover (12) is arranged above the foaming cylinder (11). A closed space is formed between the foaming cylinder (11) and the top cover (12). The support shaft (15) and the foaming cylinder (11) are coaxial. The support shaft (15) is rotatably mounted inside the foaming cylinder (11). A support cylinder (16) is fixedly mounted outside the support shaft (15). A plurality of groups of camshafts (31) are evenly rotatably mounted on a chassis (151) at the bottom of the support shaft (15). The camshafts (31) are arranged inside the support cylinder (16). One group of camshafts (31) corresponds to one group of blade mechanisms. The blade mechanisms comprise a slider (41) and a blade (42). The slider (41) is slidably mounted on a circulation groove (311) of the camshaft (31). The air intake pipe (421) on the blade (42) is rotatably mounted on the slider (41). The air intake pipe (421) of the blade (42) is slidably mounted on the slider (41). The blade mechanism is mounted on the rectangular groove of the support tube (16). When the support shaft (15) rotates, it drives the blade mechanism to orbit. When the cam shaft (31) rotates, it drives the blade mechanism to slide longitudinally on the rectangular groove and rotate. A circulation mechanism is arranged between the blade mechanisms. The circulation mechanism comprises an annular air pipe (51) and a plurality of groups of contraction ventilation pipes (52). One group of contraction ventilation pipes (52) corresponds to one group of blade mechanisms. The end of the contraction ventilation pipe (52) is tightly connected to the annular air pipe (51). The bottom of the contraction ventilation pipe (52) is tightly connected to the air intake pipe (421) in rotation. A plurality of groups of one-way valve assemblies (43) are arranged on the exhaust holes (422) of the blades (42). The air pump on the annular air pipe (51) outputs the gas above the foaming tube (11) from the one-way valve assembly (43) through the contraction ventilation pipe (52) and the blades (42). A sealing mechanism is arranged between the air intake pipe (421) of each group of blades (42) and the support tube (16).

2. A polyurethane foaming device according to claim 1, characterized in that: The sealing mechanism comprises a sealing plate (21) and a sealing block (22); the sealing plate (21) is fixedly mounted on the support tube (16); the sealing block (22) is axially slidably mounted on the support tube (16); the sealing block (22) is arranged on the sealing plate (21); the sealing plate (21) is a telescopic component; the sealing plate (21) and the sealing block (22) seal a rectangular groove of the support tube (16); and the sealing block (22) is rotatably mounted between an air inlet pipe (421) of a corresponding blade (42).

3. A polyurethane foaming device according to claim 2, characterized in that: A group of the blade mechanisms corresponds to a group of transposition mechanisms, the transposition mechanisms comprising a transposition gear (33), a top plate (152) being arranged above the support shaft (15), the top of the camshaft (31) passing through the top plate (152) and being rotatably mounted on the top plate (152), the transposition gear (33) being fixedly mounted on the top of the camshaft (31), an internal gear ring (17) being fixedly mounted above the top cover (12), and the transposition gear (33) being meshed with the internal gear ring (17).

4. A polyurethane foaming device according to claim 3, characterized in that: The shifting mechanism further comprises a rotating assembly (32), one group of blades (42) corresponding to one group of rotating assemblies (32), the rotating assembly (32) comprising a rotating gear (321) and a rack (322), an air inlet pipe (421) of the blades (42) being fixedly mounted on the rotating gear (321), the rack (322) being longitudinally fixedly mounted inside the support tube (16), and the rotating gear (321) being meshed with the rack (322).

5. A polyurethane foaming device according to claim 4, characterized in that: A trachea bracket (53) is rotatably mounted above the support shaft (15); the trachea bracket (53) is arranged above the top plate (152); the annular trachea (51) is rotatably mounted on the trachea bracket (53); the interior of the camshaft (31) is a hollow structure; the middle portion of the contraction vent pipe (52) is rotatably mounted inside the camshaft (31).

6. A polyurethane foaming device according to claim 5, characterized in that: The interior of the blade (42) is a hollow structure, a material inlet (14) is provided above the top cover (12), a motor (13) is fixedly mounted on the top cover (12), and an output shaft of the motor (13) is fixedly mounted on the support shaft (15).

7. A polyurethane foaming device according to claim 6, characterized in that: The one-way valve assembly (43) comprises a blocking disk (431) and a round table (433). A piston (432) is fixedly mounted on the blocking disk (431). The piston (432) is slidably mounted inside the exhaust hole (422). The piston (432) and the exhaust hole (422) are in close contact. The round table (433) is arranged inside the exhaust hole (422). The bottom of the round table (433) is fixedly mounted on the piston (432). A round rod (434) is fixedly mounted on the top of the round table (433). A tail plate (435) is fixedly mounted on the tail of the round rod (434). A spring (44) is arranged between the tail plate (435) and the inside of the blade (42).

8. A polyurethane foaming device according to claim 7, characterized in that: The radius of the blocking disk (431) is R, the radius of the piston (432) is r, the radius of the bottom of the cone (433) is equal to the radius of the piston (432), the radius of the piston (432) is equal to the radius of the exhaust hole (422), and the radius of the top of the cone (433) is d, d<r<R.

9. A polyurethane foaming process, using a polyurethane foaming device as described in any one of claims 1 to 8, characterized in that: The specific steps include: Step 1: starting the motor (13), the motor (13) drives the support shaft (15) and the support cylinder (16) to rotate, and the support cylinder (16) drives the blade mechanism to revolve when rotating; under the meshing action of the internal gear ring (17) and the transposition gear (33), the transposition gear (33) is driven to drive the cam shaft (31) to rotate, so that the slider (41) of the blade mechanism slides on the circulation groove (311), thereby driving the blade mechanism to move longitudinally on the rectangular groove of the support cylinder (16); Step 2: When the blade mechanism moves longitudinally on the rectangular groove under the driving force of the rotating assembly (32), the blade (42) of the blade mechanism rotates. Step 3: injecting the polyurethane foaming raw material into the foaming cylinder (11) in proportion from the feed port (14) of the top cover (12); during this process, the foaming cylinder (11) and the top cover (12) are in a closed environment, and the plurality of blade mechanisms slide and revolve on the rectangular grooves, while the blades (42) of the blade mechanisms rotate, so that the polyurethane foaming raw material is fully mixed; Step 4: During the foaming process of the polyurethane foaming raw material, gas is generated and a foam structure begins to be generated. The gas emerges from the mixed raw material and gathers above the foaming cylinder (11). The air pump on the annular air pipe (51) is started to transport the gas to the inside of the blade (42) through the contraction ventilation pipe (52) and the air inlet pipe (421), thereby increasing the pressure inside the blade (42); Step 5: The gas squeezes the tail plate (435), the spring (44) is compressed, and the tail plate (435) drives the round table (433) to slide toward the outside of the exhaust hole (422) through the round rod (434), breaking the close contact between the piston (432) and the exhaust hole (422), and the gas inside the blade (42) is discharged from the exhaust hole (422) and further contacts the mixed raw material inside the foaming tube (11), so that the polyurethane foaming raw material is fully foamed.

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