A pattern processing method for polyurethane foam material

Abstract

The present invention discloses a method for processing a pattern of a polyurethane foam material, and relates to the technical field of processing polyurethane foam materials. The method for processing a pattern of a polyurethane foam material is implemented using a pattern processing device for a polyurethane foam material, and the pattern processing device for a polyurethane foam material comprises a forming cylinder, a mounting seat is fixedly arranged at the bottom of the inner side of the forming cylinder, a dual driving mechanism is arranged at the top of the mounting seat, a lower clamping mechanism is arranged at the top of the dual driving mechanism, and a top block in the dual driving mechanism pushes two first inner plates in the lower clamping mechanism away from each other. The present invention effectively reduces the difficulty of wiring color lines, and can effectively ensure the tightness of the color lines after wiring. In addition, demoulding can be carried out more conveniently later, and while ensuring product quality, it saves manpower and improves demoulding efficiency, and is effectively suitable for industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane foam material processing, and in particular to a method for processing a pattern of a polyurethane foam material. Background Art

[0002] Polyurethane foam material is polyurethane foam plastic, which has the properties of low density, good elastic recovery, sound absorption, breathability, and heat preservation. It is mainly used as furniture cushioning material, vehicle seat cushioning material and various soft cushioning laminated composite materials.

[0003] The invention patent with patent application publication number CN 101941293 B discloses a method for pattern processing of polyurethane foam material. The processing method comprises the following steps: first, a plurality of colored wires different from the color of the polyurethane foam material are evenly arranged radially in a colored wire rack, and then the colored wire rack is evenly installed in a pattern processing rack, and then the pattern processing rack is installed in a reactor, and then a uniform mixture of polyurethane particles, polyether, toluene diisocyanate and dichloromethane is added into the reactor, and the reactor is pressurized. After foaming for 1-2 hours, the sample is taken out, at which time the colored wires are combined with the sample as one, and then the sample is loaded and sliced.

[0004] Compared with the prior art, the pattern processing method of the polyurethane foam material of the invention has the characteristics of simple process, low processing cost, regular pattern on the processed foam material and good anti-counterfeiting function.

[0005] However, after actual use by technicians skilled in the art, it was found that the above method still has some shortcomings. The most obvious one is that when wiring the colored wires, the two ends of the colored wires need to be connected to the inner wire hoop and the outer wire hoop respectively. The inconvenient operation and synchronization cannot ensure the tightness, which may cause the wires to be too loose and affect the quality of the finished product.

[0006] In addition, when the molded polyurethane foam material is demolded, since the colored wires are fixed between the inner wire hoop and the outer wire hoop, the two ends of the colored wires will pull the molded polyurethane foam material, making it impossible to demold it conveniently. At this time, it is necessary to manually untie the two ends of the multiple colored wires from the inner wire hoop and the outer wire hoop respectively, which wastes manpower and seriously reduces the demolding efficiency, and cannot be effectively applied to industrial production.

[0007] Therefore, it is necessary to invent a pattern processing method for polyurethane foam material to solve the above problems. Summary of the invention

[0008] The object of the present invention is to provide a method for pattern processing of a polyurethane foam material to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for pattern processing of a polyurethane foam material, the method for pattern processing of a polyurethane foam material is implemented using a pattern processing device for a polyurethane foam material, the pattern processing device for a polyurethane foam material comprises a molding tube, a mounting seat is fixedly arranged at the bottom inner side of the molding tube, a double driving mechanism is arranged at the top of the mounting seat, a lower clamping mechanism is arranged at the top of the double driving mechanism, a top block in the double driving mechanism pushes two first inner plates in the lower clamping mechanism in a direction away from each other, trigger mechanisms are arranged on both sides of the molding tube, a supporting mechanism is arranged at the top of the molding tube, an upper clamping mechanism is arranged on the inner side of the supporting mechanism, and a push block in the trigger mechanism pushes two second locking holes in the upper clamping mechanism in a direction close to each other through a push rod in the upper clamping mechanism.

[0010] Preferably, the dual drive mechanism comprises a drive motor, a screw, a threaded sleeve, a lifting column, a top block and a first spring;

[0011] The driving motor is fixedly arranged on the top of the mounting seat, the screw transmission is arranged on the top of the driving motor, the threaded sleeve is sleeved on the outside of the screw and is threadedly connected to the screw, the lifting column is slidably nested on the top of the screw, the top block is fixedly arranged on the top of the lifting column, the top end of the first spring is fixedly connected to the lifting column and the bottom end thereof is fixedly connected to the inner wall of the screw.

[0012] Preferably, the lower clamping mechanism comprises a first outer plate, a first inner plate, a first locking hole and a second spring;

[0013] The first outer plate is fixedly sleeved on the top of the outer side of the threaded sleeve and slidably arranged on the inner side of the forming cylinder. Two first inner plates and two second springs are provided. The two first inner plates are respectively slidably arranged on both sides of the first outer plate. One end of the second spring is fixedly connected to the inner wall of the first outer plate and the other end is fixedly connected to the adjacent first inner plate. A plurality of first locking holes are provided, and the plurality of first locking holes are evenly penetrated through the first outer plate and the two first inner plates.

[0014] Preferably, the trigger mechanism comprises a mounting plate, a trigger pin, a third spring, a connecting rod, a lifting rod and a push block;

[0015] The mounting plate is fixedly arranged on the inner wall of the forming cylinder, the trigger pin passes through the mounting plate and is slidably connected to the mounting plate, the third spring is sleeved on the outside of the trigger pin, one end of the third spring is fixedly connected to the mounting plate and the other end is fixedly connected to the trigger pin, the connecting rod is slidably nested on the side wall of the forming cylinder, one end of the top of the connecting rod is fixedly connected to the trigger pin and the other end of the top is fixedly connected to the lifting rod, and the push block is fixedly arranged on the inner top of the lifting rod.

[0016] Preferably, the support mechanism comprises an L-shaped bracket and a mounting ring;

[0017] Two L-shaped brackets are provided, and the two L-shaped brackets are respectively fixedly provided at the tops of both sides of the forming tube, the lifting rod is slidably penetrated and provided inside the L-shaped bracket, and the mounting ring is fixedly provided at the tops of the two L-shaped brackets.

[0018] Preferably, the upper clamping mechanism comprises a second outer plate, a second inner plate, a second locking hole, a fourth spring and a push rod;

[0019] The second outer plate is fixedly arranged on the inner side of the mounting ring, and two of the second inner plate, the fourth spring and the push rod are respectively provided. The two second inner plates are respectively slidably arranged on both sides of the second outer plate, one end of the fourth spring is fixedly connected to the inner wall of the second outer plate and the other end is fixedly connected to the adjacent second inner plate, and the two push rods are respectively slidably penetrated on both sides of the second outer plate, one end of the push rod is fixedly connected to the adjacent second inner plate and the other end is fitted with the adjacent push block, and a plurality of second locking holes are provided, and the plurality of second locking holes are evenly penetrated on the second outer plate and the two second inner plates.

[0020] Preferably, the pattern processing method of the polyurethane foam material specifically comprises the following steps:

[0021] S1, passing the plurality of colored threads through the plurality of second locking holes respectively, moving the plurality of colored threads to the top opening of the forming cylinder, and then passing the plurality of colored threads through the plurality of first locking holes respectively;

[0022] S2, after the driving motor is started, it drives the screw to rotate. When the screw rotates, it drives the lower clamping mechanism to descend as a whole through the threaded sleeve. When the lower clamping mechanism descends as a whole, the top block enters between the two first inner plates and pushes the two first inner plates. At this time, the two first inner plates move away from each other, thereby locking the colored line located inside the first locking hole;

[0023] S3, as the lower clamping mechanism continues to descend, the lower clamping mechanism continues to pull the plurality of colored wires downward, and the colored wires continuously pass through the second locking hole during the descent process;

[0024] S4, when the lower clamping mechanism descends to the first threshold, the first outer plate presses down the trigger pin, and the trigger pin compresses the third spring, and at the same time drives the lifting rod to descend through the connecting rod. When the lifting rod descends, the push block pushes the push rod, and at this time the push rod pushes the second inner plate, so that the second inner plate locks the colored line located inside the second locking hole;

[0025] S5, when the lower clamping mechanism drops to the second threshold, the driving motor is stopped, and the lower clamping mechanism no longer drops, and the colored line between the lower clamping mechanism and the upper clamping mechanism is straightened;

[0026] S6, adding a uniform mixture of polyurethane particles, polyether, toluene diisocyanate and dichloromethane into the molding tube through the top opening of the molding tube, and then foaming the mixture under pressure, and obtaining a polyurethane foam material after the foaming is completed;

[0027] S7, make the driving motor drive the screw to rotate in the opposite direction, and then make the double driving mechanism drive the lower clamping mechanism to reset. At this time, the lower clamping mechanism pushes the molded polyurethane foam material to the top opening of the molding tube. In addition, after the lower clamping mechanism is reset, the top block is moved out from between the two first inner plates, and then the first inner plate releases the lock on the bottom end of the color line, and then all the color lines on the top of the polyurethane foam material are cut off horizontally, and then the polyurethane foam material is removed from the top of the lower clamping mechanism.

[0028] Technical effects and advantages of the present invention:

[0029] The present invention is provided with a dual driving mechanism, a lower clamping mechanism, a triggering mechanism and an upper clamping mechanism, so that the dual driving mechanism can be used to drive the lower clamping mechanism to descend while causing the lower clamping mechanism to lock the end of the colored wire, thereby quickly realizing the wiring of the colored wire, and at the same time, the lower clamping mechanism is used to trigger the triggering mechanism, so that the triggering mechanism drives the upper clamping mechanism to lock the top of the colored wire, thereby keeping the colored wire in a tensioned state, and the dual driving mechanism can also be used to drive the lower clamping mechanism during subsequent demoulding, so that the lower clamping mechanism can be ejected and the lock on the bottom of the colored wire can be automatically released. Compared with the same type of method in the prior art, the present invention effectively reduces the difficulty of wiring the colored wire and can effectively ensure the tightness of the colored wire after wiring. In addition, demoulding can be carried out more conveniently later, which ensures product quality while saving manpower and improving demoulding efficiency, and is effectively suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall front view structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention.

[0032] Figure 3 It is a front cross-sectional structural schematic diagram of the dual driving mechanism and the lower clamping mechanism of the present invention.

[0033] Figure 4 It is a schematic diagram of the front view structure of the trigger mechanism of the present invention.

[0034] Figure 5 It is a front cross-sectional structural schematic diagram of the support mechanism and the upper clamping mechanism of the present invention.

[0035] In the figure: 1. forming cylinder; 2. mounting seat; 3. double driving mechanism; 31. driving motor; 32. screw; 33. threaded sleeve; 34. lifting column; 35. top block; 36. first spring; 4. lower clamping mechanism; 41. first outer plate; 42. first inner plate; 43. first locking hole; 44. second spring; 5. trigger mechanism; 51. mounting plate; 52. trigger pin; 53. third spring; 54. connecting rod; 55. lifting rod; 56. push block; 6. supporting mechanism; 61. L-shaped bracket; 62. mounting ring; 7. upper clamping mechanism; 71. second outer plate; 72. second inner plate; 73. second locking hole; 74. fourth spring; 75. push rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] The present invention provides Figure 1-5 A pattern processing method for a polyurethane foam material is shown, and the pattern processing method for the polyurethane foam material is implemented using a pattern processing device for a polyurethane foam material, and the pattern processing device for the polyurethane foam material includes a molding tube 1, a mounting seat 2 is fixedly arranged at the bottom inner side of the molding tube 1, a dual driving mechanism 3 is arranged at the top of the mounting seat 2, a lower clamping mechanism 4 is arranged at the top of the dual driving mechanism 3, a top block 35 in the dual driving mechanism 3 pushes two first inner plates 42 in the lower clamping mechanism 4 in a direction away from each other, trigger mechanisms 5 are arranged on both sides of the molding tube 1, a supporting mechanism 6 is arranged at the top of the molding tube 1, an upper clamping mechanism 7 is arranged on the inner side of the supporting mechanism 6, and a push block 56 in the trigger mechanism 5 pushes two second locking holes 73 in the upper clamping mechanism 7 in a direction close to each other through a push rod 75 in the upper clamping mechanism 7.

[0039] like Figure 3As shown, the dual drive mechanism 3 includes a drive motor 31, a screw 32, a threaded sleeve 33, a lifting column 34, a top block 35 and a first spring 36, wherein the drive motor 31 is fixedly arranged on the top of the mounting seat 2, the drive motor 31 is arranged to drive the screw 32 to rotate, the screw 32 is transmission-arranged on the top of the drive motor 31, the screw 32 is arranged to drive the threaded sleeve 33 to rise and fall, the threaded sleeve 33 is sleeved on the outside of the screw 32 and is threadedly connected to the screw 32, and the lifting column 34 is slidably nested. Placed on the top of the screw rod 32, the top block 35 is fixedly arranged on the top of the lifting column 34, the top end of the first spring 36 is fixedly connected to the lifting column 34 and the bottom end is fixedly connected to the inner wall of the screw rod 32. The setting of the lifting column 34, the top block 35 and the first spring 36 is used for the first spring 36 to drive the lifting column 34 to support the top block 35 when the lower clamping mechanism 4 descends, so that the top block 35 enters between the two first inner plates 42 in the lower clamping mechanism 4 and pushes the two first inner plates 42 to move away from each other.

[0040] like Figure 3 As shown, the lower clamping mechanism 4 includes a first outer plate 41, a first inner plate 42, a first locking hole 43 and a second spring 44, wherein the first outer plate 41 is fixedly sleeved on the outer top of the threaded sleeve 33 and slidably arranged on the inner side of the forming tube 1, and two first inner plates 42 and second springs 44 are each provided with, and the two first inner plates 42 are respectively slidably arranged on both sides of the inside of the first outer plate 41, one end of the second spring 44 is fixedly connected to the inner wall of the first outer plate 41 and the other end is fixedly connected to the adjacent first inner plate 42, and a plurality of first locking holes 43 are provided, and a plurality of the first locking holes 43 are evenly penetrated on the first outer plate 41 and the two first inner plates 42, and the first inner plate 42 is provided for moving inside the first outer plate 41 after being pushed, thereby locking the bottom end of the colored line, and the second spring 44 is provided for driving the first inner plate 42 to reset after the top block 35 is moved out.

[0041] like Figure 4 and Figure 5As shown, the trigger mechanism 5 includes a mounting plate 51, a trigger pin 52, a third spring 53, a connecting rod 54, a lifting rod 55 and a push block 56, wherein the mounting plate 51 is fixedly arranged on the inner wall of the forming cylinder 1, the trigger pin 52 passes through the mounting plate 51 and is slidably connected to the mounting plate 51, the third spring 53 is sleeved and arranged on the outer side of the trigger pin 52, one end of the third spring 53 is fixedly connected to the mounting plate 51 and the other end is fixedly connected to the trigger pin 52, the connecting rod 54 is slidably nested and arranged on the side wall of the forming cylinder 1, one end of the top of the connecting rod 54 is fixedly connected to the trigger pin 52 and the other end of the top is fixedly connected to the lifting rod 55, the push block 56 is fixedly arranged on the inner top of the lifting rod 55, the trigger pin 52, the connecting rod 54, the lifting rod 55 and the push block 56 are arranged to drive the push block 56 to push the push rod 75 in the upper clamping mechanism 7 when the trigger pin 52 is compressed, and the third spring 53 is arranged to drive the trigger pin 52 to reset after the pressure is released.

[0042] like Figure 5 As shown, the supporting mechanism 6 includes an L-shaped bracket 61 and a mounting ring 62, wherein two L-shaped brackets 61 are provided, and the two L-shaped brackets 61 are respectively fixedly provided at the tops of both sides of the forming tube 1, and the lifting rod 55 is slidably penetrated and provided on the inner side of the L-shaped bracket 61, and the mounting ring 62 is fixedly provided at the tops of the two L-shaped brackets 61, and the setting of the L-shaped bracket 61 and the mounting ring 62 is used to fix the upper clamping mechanism 7.

[0043] like Figure 5 As shown, the upper clamping mechanism 7 includes a second outer plate 71, a second inner plate 72, a second locking hole 73, a fourth spring 74 and a push rod 75, wherein the second outer plate 71 is fixedly arranged on the inner side of the mounting ring 62, the second inner plate 72, the fourth spring 74 and the push rod 75 are each provided with two, the two second inner plates 72 are respectively slidably arranged on both sides of the second outer plate 71, one end of the fourth spring 74 is fixedly connected to the inner wall of the second outer plate 71 and the other end is fixedly connected to the adjacent second inner plate 72, the two The push rod 75 is slidably penetrated on both sides of the second outer plate 71, one end of the push rod 75 is fixedly connected to the adjacent second inner plate 72 and the other end is fitted with the adjacent push block 56, a plurality of second locking holes 73 are provided, and a plurality of second locking holes 73 are evenly penetrated on the second outer plate 71 and the two second inner plates 72, and the second inner plate 72, the fourth spring 74 and the push rod 75 are used to drive the second inner plate 72 to lock the colored line inside the second locking hole 73 when the push rod 75 is pushed.

[0044] Example 2

[0045] The pattern processing method of the polyurethane foam material specifically comprises the following steps:

[0046] S1, passing the plurality of colored threads through the plurality of second locking holes 73 respectively, moving the plurality of colored threads to the top opening of the forming tube 1, and then passing the plurality of colored threads through the plurality of first locking holes 43 respectively;

[0047] S2, after the driving motor 31 is started, it drives the screw rod 32 to rotate. When the screw rod 32 rotates, it drives the lower clamping mechanism 4 to descend as a whole through the threaded sleeve 33. When the lower clamping mechanism 4 descends as a whole, the top block 35 enters between the two first inner plates 42 and pushes the two first inner plates 42. At this time, the two first inner plates 42 move away from each other, thereby locking the colored line located inside the first locking hole 43;

[0048] S3, as the lower clamping mechanism 4 continues to descend, the lower clamping mechanism 4 continues to pull the plurality of colored threads downward, and the colored threads continuously pass through the second locking holes 73 during the descending process;

[0049] S4, when the lower clamping mechanism 4 is lowered to the first threshold, the first outer plate 41 presses down the trigger pin 52, and the trigger pin 52 compresses the third spring 53, and drives the lifting rod 55 to descend through the connecting rod 54. When the lifting rod 55 descends, the push block 56 pushes the push rod 75, and the push rod 75 pushes the second inner plate 72, so that the second inner plate 72 locks the colored line located inside the second locking hole 73;

[0050] S5, when the lower clamping mechanism 4 drops to the second threshold, the driving motor 31 is stopped, and the lower clamping mechanism 4 no longer drops, and the colored line between the lower clamping mechanism 4 and the upper clamping mechanism 7 is straightened;

[0051] S6, adding a uniform mixture of polyurethane particles, polyether, toluene diisocyanate and dichloromethane into the molding tube 1 through the top opening of the molding tube 1, and then foaming the mixture under pressure, and obtaining a polyurethane foam material after the foaming is completed;

[0052] S7, the driving motor 31 drives the screw 32 to rotate in the opposite direction, and then the dual driving mechanism 3 drives the lower clamping mechanism 4 to reset. At this time, the lower clamping mechanism 4 pushes the molded polyurethane foam material to the top opening of the molding tube 1. In addition, after the lower clamping mechanism 4 is reset, the top block 35 is moved out from between the two first inner plates 42, and then the first inner plate 42 releases the lock on the bottom end of the colored line, and then all the colored lines on the top of the polyurethane foam material are cut off horizontally, and then the polyurethane foam material can be removed from the top of the lower clamping mechanism 4.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for pattern processing of a polyurethane foam material, characterized in that: The pattern processing method of the polyurethane foam material is realized by using the pattern processing equipment of the polyurethane foam material, and the pattern processing equipment of the polyurethane foam material comprises a molding cylinder, a mounting seat is fixedly arranged at the bottom of the inner side of the molding cylinder, a double driving mechanism is arranged at the top of the mounting seat, a lower clamping mechanism is arranged at the top of the double driving mechanism, a top block in the double driving mechanism pushes two first inner plates in the lower clamping mechanism in a direction away from each other, trigger mechanisms are arranged on both sides of the molding cylinder, a supporting mechanism is arranged at the top of the molding cylinder, an upper clamping mechanism is arranged on the inner side of the supporting mechanism, and a push block in the trigger mechanism pushes two second inner plates in the upper clamping mechanism in a direction close to each other through a push rod in the upper clamping mechanism; The dual drive mechanism includes a drive motor, a screw, a threaded sleeve, a lifting column, a top block and a first spring. The drive motor is fixedly arranged on the top of the mounting seat, the screw transmission is arranged on the top of the drive motor, the threaded sleeve is sleeved on the outside of the screw and is threadedly connected to the screw, the lifting column is slidably nested on the top of the screw, the top block is fixedly arranged on the top of the lifting column, the top of the first spring is fixedly connected to the lifting column and the bottom of the first spring is fixedly connected to the inner wall of the screw; The upper clamping mechanism includes a second outer plate, a second inner plate, a second locking hole, a fourth spring and a push rod, the second outer plate is fixedly arranged on the inner side of the mounting ring, the second inner plate, the fourth spring and the push rod are each provided with two, the two second inner plates are respectively slidably arranged on both sides of the second outer plate, one end of the fourth spring is fixedly connected to the inner wall of the second outer plate and the other end is fixedly connected to the adjacent second inner plate, the two push rods are respectively slidably penetrated on both sides of the second outer plate, one end of the push rod is fixedly connected to the adjacent second inner plate and the other end is fitted with the adjacent push block, a plurality of second locking holes are provided, and the plurality of second locking holes are evenly penetrated on the second outer plate and the two second inner plates; The lower clamping mechanism includes a first outer plate, a first inner plate, a first locking hole and a second spring. The first outer plate is fixedly sleeved on the top of the outer side of the threaded sleeve and slidably arranged on the inner side of the forming cylinder. There are two first inner plates and two second springs. The two first inner plates are respectively slidably arranged on both sides of the first outer plate. One end of the second spring is fixedly connected to the inner wall of the first outer plate and the other end is fixedly connected to the adjacent first inner plate. There are multiple first locking holes, and the multiple first locking holes are evenly arranged on the first outer plate and the two first inner plates.

2. A method for pattern processing of a polyurethane foam material according to claim 1, characterized in that: The trigger mechanism includes a mounting plate, a trigger pin, a third spring, a connecting rod, a lifting rod and a push block; The mounting plate is fixedly arranged on the inner wall of the forming cylinder, the trigger pin passes through the mounting plate and is slidably connected to the mounting plate, the third spring is sleeved on the outside of the trigger pin, one end of the third spring is fixedly connected to the mounting plate and the other end is fixedly connected to the trigger pin, the connecting rod is slidably nested on the side wall of the forming cylinder, one end of the top of the connecting rod is fixedly connected to the trigger pin and the other end of the top is fixedly connected to the lifting rod, and the push block is fixedly arranged on the top of the inner side of the lifting rod.

3. A method for pattern processing of a polyurethane foam material according to claim 2, characterized in that: The support mechanism includes an L-shaped bracket and a mounting ring; Two L-shaped brackets are provided, and the two L-shaped brackets are respectively fixedly arranged on the tops of both sides of the forming cylinder, the lifting rod is slidably penetrated and arranged inside the L-shaped brackets, and the mounting ring is fixedly arranged on the tops of the two L-shaped brackets.

4. A method for pattern processing of a polyurethane foam material according to claim 3, characterized in that: The pattern processing method of the polyurethane foam material specifically comprises the following steps: S1, passing the plurality of colored threads through the plurality of second locking holes respectively, moving the plurality of colored threads to the top opening of the forming cylinder, and then passing the plurality of colored threads through the plurality of first locking holes respectively; S2, after the driving motor is started, it drives the screw to rotate. When the screw rotates, it drives the lower clamping mechanism to descend as a whole through the threaded sleeve. When the lower clamping mechanism descends as a whole, the top block enters between the two first inner plates and pushes the two first inner plates. At this time, the two first inner plates move away from each other, thereby locking the colored line located inside the first locking hole; S3, as the lower clamping mechanism continues to descend, the lower clamping mechanism continues to pull the plurality of colored wires downward, and the colored wires continuously pass through the second locking hole during the descent process; S4, when the lower clamping mechanism descends to the first threshold, the first outer plate presses down the trigger pin, and the trigger pin compresses the third spring, and at the same time drives the lifting rod to descend through the connecting rod. When the lifting rod descends, the push block pushes the push rod, and at this time the push rod pushes the second inner plate, so that the second inner plate locks the colored line located inside the second locking hole; S5, when the lower clamping mechanism drops to the second threshold, the driving motor is stopped, and the lower clamping mechanism no longer drops, and the colored line between the lower clamping mechanism and the upper clamping mechanism is straightened; S6, adding a uniform mixture of polyurethane particles, polyether, toluene diisocyanate and dichloromethane into the molding tube through the top opening of the molding tube, and then foaming the mixture under pressure, and obtaining a polyurethane foam material after the foaming is completed; S7, make the driving motor drive the screw to rotate in the opposite direction, and then make the double driving mechanism drive the lower clamping mechanism to reset. At this time, the lower clamping mechanism pushes the molded polyurethane foam material to the top opening of the molding tube. In addition, after the lower clamping mechanism is reset, the top block is moved out from between the two first inner plates, and then the first inner plate releases the lock on the bottom end of the color line, and then all the color lines on the top of the polyurethane foam material are cut off horizontally, and then the polyurethane foam material is removed from the top of the lower clamping mechanism.

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