Preparation process of high-flame-retardant polyurethane foam

Abstract

The invention discloses a preparation process of high-flame-retardant polyurethane foam, and belongs to the technical field of foam preparation. The driving structure drives the two-way cutter structure to move downwards, high-frequency vibration of the two-way cutter structure is achieved in cooperation with the vibration structure, low-friction and low-pressure precise cutting is achieved in the cutting process, the cutting efficiency and the flatness are improved, and then steel grit is designed at the lower cutting bottom, so that the supporting effect on high-flame-retardant polyurethane foam can be achieved, and the service life of the high-flame-retardant polyurethane foam is prolonged. The two-way cutter structure can smoothly cut into the steel grit during downward cutting, so that soft cutting can be achieved, the situation that the two-way cutter structure is prone to damage due to hard contact and cutting quality defects are caused to the high-flame-retardant polyurethane foam is avoided, the steel grit can be flattened by operating the material hopper to move horizontally in the soft supporting assembly, follow-up cutting is facilitated, and the production efficiency is improved. And the steel grit in the logistics hopper can be automatically filled when supporting defects occur, so that the supporting effect is always stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of foam preparation, in particular to a preparation process of highly flame-retardant polyurethane foam. Background Art

[0002] Highly flame-retardant polyurethane foam is widely used in numerous fields, including automotive interiors, construction engineering, medical treatment, electronics and electrical equipment, sports equipment, and aerospace. During the slitting process in the large-scale production of highly flame-retardant polyurethane foam, conventional mechanical blades are often used for transverse cutting. This presents a particular challenge when slitting large-sized flexible foam (polyurethane foam with a hardness of ultra-soft 01A to medium-soft 01C is referred to as flexible foam; for this invention, large-sized foam is defined as a size of at least 0.5m long, 0.4m wide, and 0.1m thick). The blades are prone to vertical vibration and drift, creating "tooth marks" (wavy cut surfaces) on the cut surface. Furthermore, the mechanical blades generate heat from friction during continuous cutting, which accumulates and becomes difficult to dissipate after repeated use, affecting subsequent cutting quality. When using traditional mechanical blades for vertical cutting, a rigid support platform such as a metal plate, hard plastic or hollow support plate is required to support the foam material. The blade must touch the top surface of the support platform during the cutting process, and the tool wear rate is relatively high. The key is that the scratches left by the tip of the tool on the top surface of the support platform will interfere with the direction of the tool in the new round of cutting, thereby seriously affecting the subsequent cutting accuracy, and still causing "tooth marks (wavy cutting surface)" defects. Summary of the Invention

[0003] In response to the technical problems mentioned in the background technology, the present invention proposes a preparation process for highly flame-retardant polyurethane foam.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A preparation process of highly flame-retardant polyurethane foam, comprising the following steps: S1. Raw material preparation and stirring: add the prepared polyether polyol, flame retardant, catalyst, foaming agent, foam stabilizer, cell opener, and cross-linking agent into the reactor in a certain proportion, and stir the raw materials thoroughly at a certain stirring speed and temperature; S2, foaming molding, quickly pour the stirred mixture into a preheated mold, and control the mold foaming temperature at 25℃~30℃ to ensure that the foam can be evenly foamed and formed. The mixture undergoes a chemical reaction in the mold, generating gas and forming a cellular structure. After a period of closed mold maturation, the mold is opened and the foam product is taken out; S3, foam product finishing, using a processing mechanism to finish the obtained foam product into a foam product of target size; The processing mechanism comprises a base, a soft support component and a transverse adjustment structure are arranged on the base, and a longitudinal cutting component is arranged on the transverse adjustment structure.

[0005] Preferably, the soft support assembly includes a material box and two drive screws. The material box is fixedly connected to the base and is filled with steel grit. More preferably, the steel grit has a diameter of 2-3 mm. This specific particle size of steel grit not only prevents wear on the tool tips of the longitudinal cutting assembly but also prevents interference with the tool path of the longitudinal cutting assembly. The steel grit, combined with the vibration of the longitudinal cutting assembly's tool, can reduce "tooth marks" on the foam cut surface while providing stable support for the foam. Using steel grit with too small a particle size can affect the quality of the foam product due to adhesion to the foam. Using steel grit with too large a particle size can exacerbate the "tooth marks" on the foam cut surface.

[0006] Preferably, the transmission screw is rotatably mounted on the material box via two bearings, a transmission nut is threadedly connected to the transmission screw, and a material hopper is fixedly mounted on the two transmission nuts.

[0007] Preferably, the two transmission screws are connected via a belt transmission structure, one of the transmission screws is fixedly connected to the output shaft of the motor, and the motor is fixedly mounted on the base via a fixing column.

[0008] Furthermore, the longitudinal cutting assembly includes a support frame, the lower ends of the support frame are respectively installed on the movable end of the transverse adjustment structure, and two driving structures are connected to the top of the support frame, and the lower ends of the two support seats of the two driving structures are fixedly connected to the inclined frame, and the two support seats are fixedly connected to the same connecting frame, and two vibration structures are provided on the connecting frame, and the bottom end of the vibration structure is connected to the transmission shaft, and the two transmission shafts are fixedly connected to the same bidirectional cutter structure, and two straight grooves and two arc grooves are provided on the transmission shaft, and the two straight grooves are connected to the two ends of the two arc grooves, and the lower end of the vibration structure is connected to an elastic travel structure, and the rollers of the elastic travel structure slide inside the arc groove and the straight groove.

[0009] Preferably, a knife housing is fixedly connected to the top of the connecting frame.

[0010] The groove depth of the linear groove is designed to decrease from one end to the other end, and the groove depths of the two linear grooves are designed to decrease in opposite directions.

[0011] Preferably, the driving structure includes an electric push rod, which is fixedly mounted on a support frame, the bottom end of the electric push rod is fixedly connected to a support seat, the support seat sleeve is arranged on the support frame, two sliding sleeves are fixedly mounted on the support seat, the two sliding sleeves are respectively slidably connected to two sliding rods, and the two ends of the two sliding rods are respectively fixedly connected to the support frame and the movable end of the lateral adjustment structure. An air cooling device is fixedly mounted on the support seat, and one end of the air cooling device extends into the blade housing.

[0012] Preferably, the vibration structure includes a movable sleeve, the movable sleeve is fixedly mounted on the connecting frame, a movable rod is sleeved in the movable sleeve, and a first spring is fixedly connected between the top end of the movable rod and the movable sleeve.

[0013] Preferably, an ultrasonic module is installed at the bottom end of the movable rod, a mounting piece is fixedly connected below the ultrasonic module, and the transmission shaft is rotatably mounted on the mounting piece through a bearing.

[0014] Preferably, the elastic travel structure includes a fixed frame, which is fixedly connected to the mounting piece, and a guide sleeve is fixedly installed on the fixed frame. A guide rod is slidably connected in the guide sleeve, and both ends of the guide rod are fixedly connected to a roller and a pulley respectively. The pulley travels on the connecting frame, and a second spring is fixedly connected between the pulley and the guide sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The solution of the present invention can control the cutting accuracy of highly flame-retardant polyurethane foam products with the target size (1 meter in length, 0.4 meters in width, and 0.1 meters in thickness) to within ±1 mm, significantly reducing the "tooth mark" defect on the cut surface. The corresponding cutting accuracy of traditional mechanical blades for horizontal cutting is only within ±3 mm, and the corresponding cutting accuracy of traditional mechanical blades for vertical cutting is generally within ±5 mm. On the one hand, the driving structure drives the bidirectional cutter structure to move downward, and cooperates with the vibration structure to realize high-frequency vibration of the bidirectional cutter structure, thereby achieving low-friction, low-pressure precise cutting during the cutting process, further improving cutting efficiency and flatness; on the other hand, by setting steel sand of a specific particle size at the bottom of the cut, it can not only effectively support the highly flame-retardant polyurethane foam, but also the bidirectional cutter structure can smoothly cut into the steel sand when cutting downward, thereby achieving soft cutting, preventing the bidirectional cutter structure from being easily damaged by hard contact, and causing cutting quality defects to the highly flame-retardant polyurethane foam, and the soft support component can flatten the steel sand by operating the material hopper to move horizontally, which is convenient for subsequent cutting, and the steel sand in the logistics hopper can automatically fill in when support defects occur, ensuring that the support effect is always stable and reliable; By moving the bidirectional cutter structure upward, the top of the vibration structure is blocked by the support frame and moves downward, so that the roller slides in the arc groove, and the transmission shaft is driven to rotate through the arc groove, so that the transmission shaft drives the bidirectional cutter structure to rotate 180 degrees, so that the two blade surfaces of the bidirectional cutter structure are switched for use, so that the bidirectional cutter structure has heat dissipation time, and when the bidirectional cutter structure moves downward, the vibration structure rebounds and resets, so that the switched blade surface enters the cutter housing, thereby further cooling the blade through the air cooling device, so that continuous switching and cooling operations can be performed, effectively avoiding overheating of the bidirectional cutter structure due to continuous cutting, thereby ensuring that the bidirectional cutter structure always maintains a good working state, avoiding the problem of reduced cutting effect due to overheating, and ensuring efficient and stable cutting operations; The driving structure drives the connecting assembly and the vibration structure downward, so that the bidirectional cutter structure moves downward and cooperates with the vibration to cut the highly flame-retardant polyurethane foam. The soft support assembly can realize soft cutting of the bidirectional cutter structure. During the downward movement, the vibration structure rebounds and resets, so that the upper blade surface of the bidirectional cutter structure enters the blade housing. At this time, the air cooling equipment can be used for rapid cooling and heat dissipation. The bidirectional cutter structure moves upward, so that the vibration structure and the support frame are blocked. At this time, the elastic travel structure walks in the arc groove and controls the bidirectional cutter structure to rotate and cut the blade surface. Through the organic combination of this soft cutting method and the blade surface switching heat dissipation, the service life of the bidirectional cutter structure is effectively extended, the frequency of tool replacement is reduced, and production costs are saved. After the highly flame-retardant polyurethane foam is removed, the soft support assembly can automatically pave the steel sand and fill the depression. After cutting in this way, the support surface is directly repaired. This cutting method not only realizes automatic cooling during the cutting process, but also automatically completes the switching of the blade surface during the knife removal process. The whole process is smooth and efficient, which significantly improves the processing efficiency and brings higher quality and benefits to the processing and production of highly flame-retardant polyurethane foam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional view of a preparation process of a highly flame-retardant polyurethane foam proposed by the present invention; Figure 2 A three-dimensional view of the connection between the transverse adjustment structure and the longitudinal cutting component of the preparation process of highly flame-retardant polyurethane foam proposed by the present invention; Figure 3 This is a three-dimensional view of the connection between the soft support component and the base in the preparation process of high flame retardant polyurethane foam proposed by the present invention; Figure 4 A three-dimensional view of a soft support component in a preparation process of a highly flame-retardant polyurethane foam proposed in the present invention; Figure 5 A three-dimensional view of a cross section of a soft support component in a preparation process of a highly flame-retardant polyurethane foam proposed in the present invention; Figure 6A three-dimensional view of a longitudinal support component of a preparation process for a highly flame-retardant polyurethane foam proposed in the present invention; Figure 7 A three-dimensional view of the connection between the connecting frame and the vibration structure of the preparation process of the highly flame-retardant polyurethane foam proposed by the present invention; Figure 8 A three-dimensional view of the connection between the vibration structure and the elastic traveling structure in the preparation process of a highly flame-retardant polyurethane foam proposed by the present invention; Figure 9 A three-dimensional view of the elastic traveling structure of the preparation process of a highly flame-retardant polyurethane foam proposed by the present invention; Figure 10 This is a three-dimensional view of a partial cross-section of a connecting frame in a preparation process of highly flame-retardant polyurethane foam proposed by the present invention.

[0017] In the figure: 100, processing mechanism; 101, base; 102, lateral adjustment structure; 103, soft support assembly; 1031, material box; 1032, steel shot; 1033, transmission screw; 1034, material hopper; 1035, transmission nut; 1036, belt transmission structure; 1037, motor; 1038, fixed column; 104, longitudinal cutting assembly; 1041, support frame; 1042, drive structure; 10421, slide rod; 10422, slide sleeve; 10423, support seat; 10424, electric push rod; 1043, connecting frame; 1044 , blade housing; 1045, vibration structure; 10451, movable rod; 10452, movable sleeve; 10453, first spring; 10454, ultrasonic module; 10455, mounting part; 1046, elastic travel structure; 10461, pulley; 10462, second spring; 10463, guide sleeve; 10464, guide rod; 10465, roller; 10466, fixed frame; 1047, bidirectional cutter structure; 1048, linear groove; 1049, arc groove; 10410, transmission shaft; 10411, air cooling equipment; 10412, inclined frame. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0020] The main steps of the preparation process of the highly flame-retardant polyurethane foam of the present invention include: S1. Raw material preparation and mixing The prepared polyether polyol, flame retardant, catalyst, foaming agent, foam stabilizer, cell opener, and crosslinking agent are added to a reactor in a certain proportion, and the raw materials are fully stirred at a certain stirring speed and temperature. The proportion, stirring speed, and temperature are conventional techniques known to those skilled in the art according to the product conditions and will not be described in detail in the present invention. S2, Foaming Molding The stirred mixture is quickly poured into the preheated mold. The mold foaming temperature is controlled at 25℃~30℃ to ensure that the foam can be evenly foamed and formed. The mixture undergoes a chemical reaction in the mold, generating gas and forming a cellular structure. After a period of closed mold aging, the mold is opened and the foam product is taken out. S3. Finishing of foam products The obtained foam product is finely processed into a foam product of target size by using a processing mechanism 100; The processing mechanism 100 includes a base 101 , on which a soft support component 103 and a transverse adjustment structure 102 are provided, and on which a longitudinal cutting component 104 is provided.

[0021] In each embodiment, the processing mechanism 100 used in the process is described in detail.

[0022] Example 1: Reference Figures 1-8, the processing mechanism 100 includes a base 101, on which a soft support component 103 and a lateral adjustment structure 102 are provided. The lateral position of the longitudinal cutting component 104 can be adjusted by the lateral adjustment structure 102, so as to facilitate cutting operations at different positions. The soft support component 103 includes a material box 1031 and two transmission screws 1033. The material box 1031 is fixedly connected to the base 101. Steel sand 1032 is provided in the material box 1031. The diameter of the steel sand 1032 is 2-3 mm. The material box 1031 is used to store the steel sand 1032, and the steel sand 1032 can support the high flame retardant polyurethane foam after laying, and the bidirectional cutter structure 1047 can cut into the steel sand 1032. The bidirectional cutter structure 1047 is a rigid structure, which can realize soft cutting, play a role in protecting the bidirectional cutter structure 1047, and ensure cutting quality. The transmission screw 1033 is rotatably mounted on the material box 1031 through two bearings. 31, a transmission nut 1035 is threadedly connected to the transmission screw 1033, and a material hopper 1034 is fixedly installed on the two transmission nuts 1035. The two transmission screws 1033 are connected through a belt transmission structure 1036. The transmission screw 1033 is driven to rotate by the motor 1037, so that the belt transmission structure 1036 drives the two transmission screws 1033 to rotate synchronously. The transmission screw 1033 and the transmission nut 1035 are threadedly driven, thereby driving the material hopper 1034 to move horizontally on the surface of the steel sand 1032, thereby leveling the steel sand 1032. Since the material hopper 1034 is partially filled with steel sand 1032, if it encounters a depression during the leveling process, the steel sand 1032 can be automatically replenished to play a repairing role, thereby facilitating the stable support of the highly flame-retardant polyurethane foam. One of the transmission screws 1033 is fixedly connected to the output shaft of the motor 1037, and the motor 1037 is fixedly mounted on the base 101 through a fixing column 1038. The transverse adjustment structure 102 is provided with a longitudinal cutting assembly 104, which includes a support frame 1041. The lower ends of the support frame 1041 are respectively mounted on the movable end of the transverse adjustment structure 102. The upper part of the support frame 1041 is connected to two driving structures 1042. The driving structure 1042 includes an electric push rod 10424, which is fixedly mounted on the support frame 1041. The bottom end of the electric push rod 10424 is fixedly connected to a support seat 10423. The support seat 10423 is sleeved on the support frame 1041. Two sliding sleeves 10422 are fixedly mounted on the support seat 10423. The two sliding sleeves 10422 are slidably connected to the two The sliding rod 10421 can guide the sliding sleeve 10422 through the sliding rod 10421, so that the sliding sleeve 10422 can slide smoothly along the sliding rod 10421, thereby making the support seat 10423 move smoothly up and down. The two ends of the two sliding rods 10421 are fixedly connected to the support frame 1041 and the moving end of the lateral adjustment structure 102 respectively. The two support seats 10423 of the two driving structures 1042 are fixedly connected with the inclined frame 10412 at the bottom, and the two support seats 10423 are fixedly connected to the same connecting frame 1043. The connecting frame 1043 connects the two support seats 10423 together, so that the movement of the support seat 10423 can smoothly drive the connecting frame 1043 to move. Two vibration structures 1045 are provided on the connecting frame 1043. The vibration structure 1045 includes a movable sleeve 10452. The movable sleeve 10452 is fixedly mounted on the connecting frame 1043. A movable rod 10451 is sleeved in the movable sleeve 10452. The movable sleeve 10452 can guide the movable rod 10451 so that the movable rod 10451 can move up and down smoothly. A first spring 10453 is fixedly connected between the top of the movable rod 10451 and the movable sleeve 10452. An ultrasonic module 10454 is installed at the bottom of the movable rod 10451. Ultrasonic vibration is achieved through the ultrasonic module 10454, thereby vibrating the bidirectional cutter structure 1047 to facilitate cutting into high flame retardant polyurethane foam. Cotton, while facilitating the rapid cutting of highly flame-retardant polyurethane foam, a mounting member 10455 is fixedly connected to the bottom of the ultrasonic module 10454, and the transmission shaft 10410 is rotatably mounted on the mounting member 10455 through a bearing. The transmission shaft 10410 can rotate stably through the bearing, so that the bidirectional cutter structure 1047 can be smoothly flipped. The bottom end of the vibration structure 1045 is connected to the transmission shaft 10410, and the two transmission shafts 10410 are fixedly connected to the same bidirectional cutter structure 1047. The bottom of the vibration structure 1045 is connected to an elastic travel structure 1046, and the roller 10465 of the elastic travel structure 1046 slides inside the arc groove 1049 and the straight groove 1048. In this embodiment: the electric push rod 10424 drives the support seat 10423 to move downward, so that the vibration structure 1045 can drive the bidirectional cutter structure 1047 to move downward, and cooperate with the ultrasonic module 10454 to perform ultrasonic vibration to achieve high-frequency vibration of the bidirectional cutter structure 1047, thereby achieving low-friction, low-pressure precision cutting during the cutting process, improving cutting efficiency and flatness, and secondly, by designing steel sand 1032 at the bottom of the cutting, it can not only play a supporting effect on the highly flame-retardant polyurethane foam, but also the bidirectional cutter structure 1047 can smoothly cut into the steel sand 1032 when cutting downward, thereby It can achieve soft cutting, prevent the two-way cutter structure 1047 from being easily damaged by hard contact, and cause cutting quality defects to the highly flame-retardant polyurethane foam. After cutting, the transmission screw 1033 is driven to rotate by the motor 1037, so that the belt transmission structure 1036 drives the two transmission screws 1033 to rotate synchronously, and the transmission nut 1035 drives the material bucket 1034 to move horizontally on the surface of the steel sand 1032, thereby flattening the steel sand 1032 to facilitate subsequent cutting. In addition, the steel sand 1032 in the logistics bucket can be automatically filled when support defects occur, ensuring that the support effect is always stable and reliable.

[0023] Example 2: Reference Figures 8-10, also includes an elastic travel structure 1046, the elastic travel structure 1046 includes a fixed frame 10466, the fixed frame 10466 is fixedly connected to the mounting piece 10455, and a guide sleeve 10463 is fixedly installed on the fixed frame 10466. The guide sleeve 10463 can guide the guide rod 10464 so that the guide rod 10464 slides smoothly in the guide sleeve 10463. The guide sleeve 10463 is slidably connected to the guide rod 10464. The two ends of the guide rod 10464 are respectively fixedly connected with a roller 10465 and a pulley 10461. The pulley 10461 walks on the inclined surface of the inclined frame 10412 to generate an extrusion movement. The guide rod 10464 can be moved in translation, and the rolling of the pulley 10461 can reduce the resistance between the pulley 10461 and the inclined plane frame 10412, so as to maintain smooth movement. The pulley 10461 walks on the connecting frame 1043. A second spring 10462 is fixedly connected between the pulley 10461 and the guide sleeve 10463. The second spring 10462 is reset to drive the guide rod 10464 to move, so that the guide rod 10464 is transferred from one end of the linear groove 1048 to the other end, so that it can smoothly enter the arc groove 1049. The guide rod 10464 is connected to one end of the roller 10465 and has a certain elastic force, so that the roller 1046 5 can smoothly enter the shallow groove part from the deep groove part of the straight groove 1048. The knife housing 1044 is fixedly connected to the top of the connecting frame 1043. The groove depth of the straight groove 1048 is designed to decrease from one end to the other end, and the groove depths of the two straight grooves 1048 are designed to decrease in opposite directions. The groove depth of the straight groove 1048 is designed to decrease, and the groove depths of the two straight grooves 1048 are designed to decrease in opposite directions. After the second spring 10462 is reset, the roller 10465 can enter the shallow part along the deep part of the straight groove 1048 and enter the arc groove 1049. Then, the guide rod 10464 is elastically reset to make the roller 10465 smoothly snap into the arc groove 1049, so that The subsequent roller 10465 can move along the arc groove 1049, and then the roller 10465 is transferred to the deep groove of another straight groove 1048 again, so that the bidirectional cutter structure 1047 moves downward, and the roller 10465 can move along the deep groove of the straight groove 1048 to the shallow groove again, so as to achieve a cyclic movement, and then each time the pulley 10461 moves upward, the roller 10465 can move in the arc groove 1049, thereby smoothly realizing the blade surface switching operation of the bidirectional cutter structure 1047. The support seat 10423 is fixedly installed with an air cooling device 10411, and one end of the air cooling device 10411 extends into the knife housing 1044; The vibration structure 1045 includes a movable sleeve 10452, which is fixedly mounted on the connecting frame 1043. A movable rod 10451 is sleeved in the movable sleeve 10452. When the movable rod 10451 is blocked by the support frame 1041, the movable rod 10451 moves downward, so that the bidirectional cutter structure 1047 moves downward smoothly until the knife housing 1044 is separated from the bidirectional cutter structure 1047, thereby meeting the subsequent rotation of the bidirectional cutter structure 1047. A first spring 10453 is fixedly connected between the top of the movable rod 10451 and the movable sleeve 10452. When the connecting frame 1043 moves downward, the movable rod 10451 moves downward, so that the bidirectional cutter structure 1047 moves downward smoothly until the knife housing 1044 is separated from the bidirectional cutter structure 1047. Movement allows the first spring 10453 to reset, thereby driving the movable rod 10451 to move upward, allowing the bidirectional cutter structure 1047 to smoothly enter the knife housing 1044, thereby facilitating subsequent air cooling. An ultrasonic module 10454 is installed at the bottom end of the movable rod 10451, and a mounting member 10455 is fixedly connected to the bottom of the ultrasonic module 10454. The transmission shaft 10410 is rotatably mounted on the mounting member 10455 through a bearing. Two straight grooves 1048 and two arc grooves 1049 are formed on the transmission shaft 10410. The two straight grooves 1048 are connected to both ends of the two arc grooves 1049. In this embodiment, the bidirectional cutter structure 1047 moves upward, so that the top of the movable rod 10451 is blocked by the support frame 1041 and moves downward, so that the roller 10465 slides in the arc groove 1049, and the arc groove 1049 drives the transmission shaft 10410 to rotate, so that the transmission shaft 10410 drives the bidirectional cutter structure 1047 to rotate 180 degrees, so that the two blade surfaces of the bidirectional cutter structure 1047 are switched for use, so that the bidirectional cutter structure 1047 has heat dissipation time, and when the bidirectional cutter structure 1047 moves to the left or right, the two blade surfaces of the bidirectional cutter structure 1047 are switched for use, so that the bidirectional cutter structure 1047 has heat dissipation time, and when the bidirectional cutter structure 1047 moves to the right or left, the two blade surfaces of the bidirectional cutter structure 1047 are switched for use, so that the two blade surfaces of the bidirectional cutter structure 1047 are switched for use, and the two blade surfaces of the bidirectional cutter structure 1047 move to the left or right, and the two blade surfaces of the bidirectional cutter structure 1047 move to the right or left. When moving downward, the first spring 10453 rebounds and resets, causing the movable rod 10451 to move, and the switched blade surface to enter the blade housing 1044, thereby further cooling the blade through the air cooling device 10411, so that continuous switching can be performed for cooling operations, effectively avoiding overheating of the bidirectional cutter structure 1047 due to continuous cutting, thereby ensuring that the bidirectional cutter structure 1047 always maintains a good working state, avoiding the problem of reduced cutting effect due to overheating, and ensuring efficient and stable cutting operations.

[0024] Example 3: Reference Figure 3 and Figure 6-Figure 9, also includes a longitudinal cutting assembly 104, the longitudinal cutting assembly 104 includes a support frame 1041, the lower ends of the support frame 1041 are respectively installed on the moving end of the transverse adjustment structure 102, the upper part of the support frame 1041 is connected to two driving structures 1042, the lower parts of the two support seats 10423 of the two driving structures 1042 are fixedly connected to the inclined frame 10412, and the two support seats 10423 are fixedly connected to the same connecting frame 1043, and the connecting frame 1043 is provided with two vibration structures 104 5. The bottom end of the vibration structure 1045 is connected to a transmission shaft 10410. The two transmission shafts 10410 are fixedly connected to the same bidirectional cutter structure 1047. The transmission shaft 10410 is provided with two linear grooves 1048 and two arcuate grooves 1049. The two linear grooves 1048 are connected to both ends of the two arcuate grooves 1049. The lower side of the vibration structure 1045 is connected to an elastic travel structure 1046. The roller 10465 of the elastic travel structure 1046 slides inside the arcuate grooves 1049 and the linear grooves 1048.

[0025] In this embodiment: the driving structure 1042 drives the connecting assembly and the vibration structure 1045 to move downward, so that the bidirectional cutter structure 1047 moves downward and cooperates with the vibration to cut the high flame retardant polyurethane foam, and the soft support assembly 103 can realize the soft cutting of the bidirectional cutter structure 1047, and during the downward movement, the vibration structure 1045 rebounds and resets, so that the upper blade surface of the bidirectional cutter structure 1047 enters the knife shell 1044, and the air cooling device 10411 can be used for rapid cooling and heat dissipation at this time, and the bidirectional cutter structure 1047 moves upward, so that the vibration structure 1045 and the support frame 1041 are blocked, and the elastic travel structure 1046 walks in the arc groove 1049 and controls The bidirectional cutter structure 1047 rotates to cut the blade surface. Through the organic combination of this soft cutting method and the blade surface switching heat dissipation, the service life of the bidirectional cutter structure 1047 is effectively extended, the frequency of tool replacement is reduced, and production costs are saved. After the highly flame-retardant polyurethane foam is taken out, the soft support component 103 can automatically pave the steel sand 1032 and fill the depression. After cutting in this way, the support surface is directly repaired. This cutting method not only realizes automatic cooling during the cutting process, but also automatically completes the switching of the blade surface during the knife removal process. The whole process is smooth and efficient, which significantly improves the processing efficiency and brings higher quality and benefits to the processing and production of highly flame-retardant polyurethane foam.

[0026] The specific process for preparing a highly flame-retardant polyurethane foam is as follows: S1. Raw material preparation and mixing Add the prepared polyether polyol, flame retardant, catalyst, foaming agent, foam stabilizer, cell opener, and cross-linking agent into the reactor in a certain proportion, and stir the raw materials thoroughly at a certain stirring speed and temperature; S2, Foaming Molding The stirred mixture is quickly poured into a preheated mold. The mold foaming temperature is controlled at 25℃~30℃ to ensure that the foam can be evenly foamed and formed. The mixture undergoes a chemical reaction in the mold, generating gas and forming a cellular structure. After a period of closed mold maturation, the mold is opened to take out the foam product.

[0027] Working principle: When cutting, the cutting assembly is driven to move horizontally to the designated cutting position through the lateral adjustment structure 102, and then the electric push rod 10424 is controlled to extend, and the electric push rod 10424 drives the support seat 10423 to move downward, so that the support seat 10423 drives the connecting frame 1043 and the active vibration structure 1045 to move downward, so that the transmission shaft 10410 drives the bidirectional cutter structure 1047 to move downward, and because the first spring 10453 can rebound, the first spring 10453 drives the movable rod 1 0451 moves upward, causing the elastic travel structure 1046 to move upward, causing the pulley 10461 to move upward. At this time, the second spring 10462 releases its elastic force to drive the pulley 10461 and the guide rod 10464 to reset, causing the roller 10465 to slide along one end of the linear groove 1048 to the other end and enter the arc groove 1049. When the first spring 10453 completely releases its elastic force, the blade surface of the bidirectional cutter structure 1047 enters the blade housing 1044. At this time, the air cooling device 10411 can cool the blade surface. When the bidirectional cutting blade structure 1047 contacts the highly flame-retardant polyurethane foam, the ultrasonic module 10454 vibrates to perform ultrasonic vibrations, causing the bidirectional cutting blade structure 1047 to vibrate and perform a downward cutting operation. When the bidirectional cutting blade structure 1047 reaches the bottom, the steel grit 1032 is entered to successfully complete the longitudinal cutting. After cutting, the electric push rod 10424 is controlled to retract and reset, so that the bidirectional cutter structure 1047 is reset. When the movable rod 10451 contacts the support frame 1041 upward, the movable rod 10451 pushes down the elastic travel structure 1046, so that the knife housing 1044 and the bidirectional cutter structure 1047 are separated. Subsequently, the pulley 10461 moves to the inclined surface of the inclined plane frame 10412 and is squeezed with the inclined surface, so that the guide rod 10464 drives the roller 10465 to move. The roller 10465 directly enters the arc groove 1049 and controls the rotation of the transmission shaft 10410 through the arc surface of the arc groove 1049. The transmission shaft 10410 drives the bidirectional cutter structure 1047 to switch the blade surface so that the next cooling operation can be performed. After the highly flame-retardant polyurethane foam is cut and taken out, the transmission screw 1033 is driven to rotate by the motor 1037. Under the action of the belt drive structure 1036, the two transmission screws 1033 rotate synchronously and are transmitted with the transmission nut 1035, so that the material hopper 1034 moves horizontally on the surface of the steel sand 1032 and flattens the steel sand 1032. At the same time, the steel sand 1032 is stored in the material hopper 1034. If there is a defect in the steel sand 1032, the steel sand 1032 in the material hopper 1034 is automatically filled. After repair, the material hopper 1034 is reset, and the material is reloaded and the cutting operation is carried out again.

[0028] In the embodiment, since the bidirectional cutter structure 1047 is only capable of high-frequency vibration in the vertical direction, the rigid cutter with a specific vibration direction combined with steel sand to support the foam can effectively reduce the "tooth mark" defect on the foam cutting surface during the cutting process.

[0029] By adopting the scheme of Example 3, the cutting accuracy of the highly flame-retardant polyurethane foam product of the target size (1 meter in length, 0.4m in width, and 0.1m in thickness) can be controlled within ±1mm, significantly reducing the "tooth mark" defect produced on the cutting surface. The corresponding cutting accuracy of the traditional mechanical blade for horizontal cutting is only within ±3mm, and the corresponding cutting accuracy of the traditional mechanical blade for vertical cutting is generally within ±5mm.

[0030] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A process for preparing highly flame-retardant polyurethane foam, characterized in that the steps include: S1. Raw material preparation and mixing Add the prepared polyether polyol, flame retardant, catalyst, foaming agent, foam stabilizer, cell opener, and cross-linking agent into the reactor in a certain proportion, and stir the raw materials thoroughly at a certain stirring speed and temperature; S2, Foaming Molding The stirred mixture is quickly poured into the preheated mold. The mold foaming temperature is controlled at 25℃~30℃ to ensure that the foam can be evenly foamed and formed. The mixture undergoes a chemical reaction in the mold, generating gas and forming a cellular structure. After a period of closed mold aging, the mold is opened and the foam product is taken out. S3. Finishing of foam products Using a processing mechanism (100) to finely process the obtained foam product into a foam product of target size; The processing mechanism (100) comprises a base (101), a soft support component (103) and a transverse adjustment structure (102) are provided on the base (101), and a longitudinal cutting component (104) is provided on the transverse adjustment structure (102).

2. The preparation process of highly flame-retardant polyurethane foam according to claim 1, characterized in that: The soft support assembly (103) comprises a material box (1031) and two transmission screws (1033). The material box (1031) is fixedly connected to the base (101). Steel grit (1032) is provided in the material box (1031).

3. The preparation process of highly flame-retardant polyurethane foam according to claim 2, characterized in that: The transmission screw (1033) is rotatably mounted on the material box (1031) via two bearings. A transmission nut (1035) is threadedly connected to the transmission screw (1033), and a material hopper (1034) is fixedly mounted on the two transmission nuts (1035).

4. The preparation process of highly flame-retardant polyurethane foam according to claim 3, characterized in that: The two transmission screws (1033) are connected in transmission via a belt transmission structure (1036), wherein one of the transmission screws (1033) is fixedly connected to the output shaft of the motor (1037), and the motor (1037) is fixedly mounted on the base (101) via a fixing column (1038).

5. The preparation process of highly flame-retardant polyurethane foam according to claim 1, characterized in that: The longitudinal cutting assembly (104) includes a support frame (1041), the lower ends of the support frame (1041) are respectively mounted on the movable ends of the transverse adjustment structure (102), the upper portion of the support frame (1041) is connected to two driving structures (1042), the lower portions of the two support seats (10423) of the two driving structures (1042) are fixedly connected to an inclined frame (10412), and the two support seats (10423) are fixedly connected to the same connecting frame (1043), and the connecting frame (1043) is provided with two vibration structures (1045), the vibration structures The bottom end of (1045) is connected to a transmission shaft (10410), and the two transmission shafts (10410) are fixedly connected to the same bidirectional cutter structure (1047). The transmission shaft (10410) is provided with two linear grooves (1048) and two arcuate grooves (1049), and the two linear grooves (1048) are connected to the two ends of the two arcuate grooves (1049). The lower part of the vibration structure (1045) is connected to an elastic travel structure (1046), and the roller (10465) of the elastic travel structure (1046) slides inside the arcuate grooves (1049) and the linear grooves (1048).

6. The preparation process of highly flame-retardant polyurethane foam according to claim 5, characterized in that: A knife housing (1044) is fixedly connected to the top of the connecting frame (1043); The groove depth of the linear groove (1048) is designed to decrease from one end to the other end, and the groove depths of the two linear grooves (1048) are designed to decrease in opposite directions.

7. The preparation process of highly flame-retardant polyurethane foam according to claim 6, characterized in that: The driving structure (1042) includes an electric push rod (10424), which is fixedly mounted on the support frame (1041). The bottom end of the electric push rod (10424) is fixedly connected to a support seat (10423). The support seat (10423) is sleeved on the support frame (1041). Two sliding sleeves (10422) are fixedly mounted on the support seat (10423). The two sliding sleeves (10422) are respectively slidably connected to the two sliding rods (10421). The two ends of the two sliding rods (10421) are respectively fixedly connected to the support frame (1041) and the movable end of the lateral adjustment structure (102). An air cooling device (10411) is fixedly mounted on the support seat (10423), and one end of the air cooling device (10411) extends into the blade housing (1044).

8. The process for preparing highly flame-retardant polyurethane foam according to claim 5, characterized in that: The vibration structure (1045) includes a movable sleeve (10452), the movable sleeve (10452) is fixedly mounted on the connecting frame (1043), a movable rod (10451) is sleeved in the movable sleeve (10452), and a first spring (10453) is fixedly connected between the top end of the movable rod (10451) and the movable sleeve (10452).

9. The preparation process of highly flame-retardant polyurethane foam according to claim 8, characterized in that: An ultrasonic module (10454) is installed at the bottom end of the movable rod (10451), a mounting member (10455) is fixedly connected below the ultrasonic module (10454), and the transmission shaft (10410) is rotatably mounted on the mounting member (10455) via a bearing.

10. The process for preparing highly flame-retardant polyurethane foam according to claim 8, characterized in that: The elastic travel structure (1046) includes a fixed frame (10466), the fixed frame (10466) is fixedly connected to the mounting member (10455), a guide sleeve (10463) is fixedly installed on the fixed frame (10466), a guide rod (10464) is slidably connected in the guide sleeve (10463), the two ends of the guide rod (10464) are respectively fixedly connected to a roller (10465) and a pulley (10461), the pulley (10461) travels on the connecting frame (1043), and a second spring (10462) is fixedly connected between the pulley (10461) and the guide sleeve (10463).

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