A heating device with gradual drying function for polyurethane film production

Abstract

The present invention discloses a heating device with a gradual drying function for the production of polyurethane film, and belongs to the technical field of polyurethane film heating devices. The device comprises a heating shell, a driving motor, a blowing device, a sliding partition assembly, a fixed partition, a temperature detection mechanism, a fixed slide plate and a heat insulation baffle. The present invention cooperates with a stopper and an electric block, so that the sliding partition assembly can adjust the spacing of its own moving partitions, and can also move the position of the entire sliding partition assembly, thereby realizing that each partition area can freely adjust different spacings, so that the area of ​​each gradual color area of ​​the polyurethane film can be electrically adjusted to meet the production needs of polyurethane films of different specifications; the temperature at the edge of the polyurethane film is detected by the temperature detection mechanism, so as to ensure that each separation area on the surface of the polyurethane film is heated to a preset temperature in each heating stage, so that the surface of the polyurethane film shows a gradual color after being stretched.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane film heating devices, in particular to a heating device with a gradual drying function for polyurethane film production. Background Art

[0002] Polyurethane films are often used in car covers and films. With the continuous development of the car cover and film industry, various types of colorful car films have gradually entered the market. There is a kind of colorful film on the market, which is mainly prepared based on the drawn color-changing film. That is, in the process of drying the polyurethane film, the temperature is gradually changed to make the stretching degree of the polyurethane film surface different, so that the color rendering effect of the polyurethane film surface is inconsistent, thereby improving the colorfulness of the polyurethane film.

[0003] Usually, when manufacturers produce colorful films, they use manually adjusted partitions to change the area of ​​the heating area. This method obviously cannot meet the needs of current automated production. It not only consumes manpower, but also causes differences in the quality of the color-changing area due to the error of manual adjustment. When the colorful film is heated, temperature control is also particularly important. When the temperature is not properly controlled, the color rendering effect of the colorful film will become uneven. Therefore, a heating device is needed on the market to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a heating device with a gradual drying function for producing polyurethane films, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A heating device with a gradual drying function for polyurethane film production includes a heating shell, a fixed partition is symmetrically installed in the heating shell, a sliding partition assembly is centrally symmetrically and slidably installed in the heating shell, an insulating baffle is rotatably installed in the heating shell, a fixed slide is slidably installed in the heating shell, a clamping block is installed on the fixed slide, a plurality of blowing devices are slidably installed in the heating shell, the blowing devices are respectively connected to the sliding partition assembly and the fixed partition, a driving motor is installed on the heating shell, the output shaft of the driving motor passes through the heating shell and is connected to the sliding partition assembly, a temperature detection mechanism is rotatably installed inside the heating shell, and the sliding partition assembly is connected to the temperature detection mechanism.

[0006] The clamping block on the fixed plate is used to clamp and fix the polyurethane film, and stretch the polyurethane film during the heating process; a control system is installed in the heating device, and the control system is used to control the entire heating device and analyze the received electrical signals. A cooling chamber is provided between the heating shell and the heat insulation baffle, and the cooling chamber is located on the side of the heat insulation baffle away from the blowing device. Under normal conditions, the temperature detection mechanism is located in the cooling chamber and is at a 90° angle to the fixed slide plate, and is isolated from the blowing device by the heat insulation baffle to prevent the hot air flow of the blowing device from directly blowing the temperature detection mechanism in the non-working state, so that the temperature detection mechanism can be cooled in the cooling chamber, and the temperature detection mechanism returns to the initial temperature measured, which is convenient for each temperature detection.

[0007] The staff pulls the fixed slide, and the fixed slide slides along the slide groove on the inner wall of the heating shell. When the fixed slide is pulled out, the two ends of the polyurethane film are fixed on the fixed slide by clamping blocks. After that, the surface of the polyurethane film is sprayed, and the fixed slide with the polyurethane film is pushed back into the heating shell.

[0008] The sliding partition assembly includes a slide plate and a threaded sleeve rod. The slide plate is slidably installed in the heating shell. The movable partitions are symmetrically and slidably installed on the slide plate. A blowing device is installed between the movable partitions. A blowing device is installed between the movable partitions and the fixed partitions. The threaded sleeve rod is rotatably installed in the heating shell. An adjusting rod is installed on the inner thread of the threaded sleeve rod. The adjusting rod is threadedly connected to the movable partition. An electric clamp block is slidably installed on the slide plate, and a limiter is installed on the threaded sleeve rod.

[0009] The adjustment rod is provided with a displacement section, which is threadedly connected with the threaded sleeve rod, and the displacement section is provided with a number of equally spaced annular grooves, which are engaged with the limiter, and the adjustment rod is provided with a first adjustment section and a second adjustment section, which are provided with mutually symmetrical threads, and the first adjustment section and the second adjustment section are both threadedly connected with the movable partition, and a clamping section is provided between the first adjustment section and the second adjustment section. The cross section of the clamping section is square, and when the electric clamping block is close, it is engaged with the clamping section, so that the clamping section cannot rotate.

[0010] The limiter includes a limit shell and a sliding spring. The limit shell is installed on the threaded sleeve rod. A sliding rod is slidably installed in the limit shell. One end of the sliding rod passes through the sliding spring and is installed with a clamping ring. An adsorption block is installed on the clamping ring. An electromagnetic block is installed on the limit shell, and the clamping ring is engaged with the annular groove.

[0011] The snap ring is in the shape of a semicircular ring and can be embedded in the annular groove. Under normal conditions, the electric clamp blocks are separated from each other, and the sliding rod drives the snap ring to extend under the action of the sliding spring, so that the snap ring is embedded in the annular groove. Under the restraining action of the snap ring, the adjustment rod cannot rotate and retract in the threaded sleeve rod. At this time, the control system controls the drive motor to rotate, and the output shaft of the drive motor drives the threaded sleeve rod to rotate. Since the adjustment rod is restrained by the snap ring, the adjustment rod is driven by the threaded sleeve rod to rotate together. The rotation of the adjustment rod drives the movable partition to slide in the slide groove of the slide groove plate. The threads on the first adjustment section and the second adjustment section are arranged symmetrically, so the two movable partitions move in opposite directions, approaching or moving away from each other, so as to achieve the purpose of adjusting the spacing between the movable partitions.

[0012] When the position of the slide plate needs to be adjusted, the control system energizes the electromagnetic block, the electromagnetic block generates magnetic force and absorbs the adsorption block, and the adsorption block drives the retaining ring to overcome the elastic force of the sliding spring and disengage from the annular groove, so that the adjusting rod can rotate and retract in the threaded sleeve rod, and then the electric clamping block is turned on, the electric clamping block moves and approaches until it is engaged with the clamping section, so that the adjusting rod cannot rotate, and then the control system turns on the drive motor, and the output shaft of the drive motor drives the threaded sleeve rod to rotate. Under the constraint of the electric clamping block, the adjusting rod retracts and retracts in the threaded sleeve, thereby driving the slide plate and the movable partition to slide as a whole, thereby achieving the purpose of adjusting the position of the sliding partition assembly as a whole.

[0013] The control system turns on the drive motor, which drives the sliding partition assembly to first adjust the spacing of its own moving partitions, and then adjusts the overall position of one group of sliding partition assemblies through the cooperation of the limiter and the electric block, so that the distance between one group of sliding partition assemblies and the fixed partition reaches the preset value. After that, the spacing between another group of sliding partition assemblies and the fixed partition is adjusted to complete the adjustment of the spacing between all partitions. The partitions divide the surface of the polyurethane membrane into several areas, and the hot air flow heats and dries the surface of the polyurethane membrane in each area.

[0014] The blowing device includes a blowing shell and a connecting rod assembly. Adjusting springs are symmetrically installed on both sides of the blowing shell. One end of the adjusting spring is respectively connected to the movable partition or the fixed partition. An air inlet pipe is provided at the top of the blowing shell. The air inlet pipe is externally connected to an air supply device. A long strip air outlet is provided at the bottom of the blowing shell. A swing blade assembly is rotatably installed at the bottom of the blowing shell. The swing blade assembly is connected to the movable partition or the fixed partition through a connecting rod assembly.

[0015] An air inlet chamber is provided inside the blowing shell, and the air inlet pipe is connected to the air inlet chamber inside the blowing shell. The air supply device is used to transport airflows of different temperatures to the air inlet pipe. The airflow flows into the air inlet chamber of the blowing shell through the air inlet pipe, and then flows out from the air outlet of the blowing shell, thereby forming a long strip of airflow to blow the surface of the polyurethane film.

[0016] The swing blade assembly includes an air outlet side plate, which is installed at both ends of the blowing shell. Air outlet blades are rotatably installed on the air outlet side plate, and swing blade connecting rods are rotatably installed between the air outlet blades. The air outlet blades are connected to the movable partition or the fixed partition through the connecting rod assembly.

[0017] The connecting rod assembly includes a connecting rod slot and a first connecting rod. The connecting rod slot is installed on a movable partition or a fixed partition. A T-shaped connecting rod is slidably installed in the connecting rod slot. A second connecting rod is installed on the air outlet blade. The second connecting rod is rotatably connected to the T-shaped connecting rod through the first connecting rod.

[0018] When the position of the movable partition is adjusted, the adjusting spring is driven to expand and contract. When the expansion and contraction amounts of the adjusting springs on both sides of the hair dryer shell are inconsistent, different elastic forces will be generated. At this time, the adjusting spring on the side with larger elastic force will drive the hair dryer shell to pull back, and drive the adjusting spring on the side with smaller elastic force to be stretched again, until the elastic stretching lengths of the adjusting springs on both sides are consistent, so that the hair dryer shell is always in the middle position of the two partitions; the swing blade assembly swings under the action of the connecting rod assembly as the distance between the partitions changes. When the distance between the partitions changes, the movable partition or the fixed partition drives the T-type connecting rod to move through the connecting rod slot, and the T-type connecting rod drives the second connecting rod to move through the first connecting rod, and the second connecting rod drives the air outlet swing blade to move. The air outlet swing blades are linked by the swing blade connecting rod, so that the two sets of swing blade assemblies at the bottom of the hair dryer shell open and close with the spacing of the partitions, so that the blowing device can blow out hot air flows with corresponding spacings according to the distance between the partitions.

[0019] The temperature detection mechanism includes a transmission cylinder, a detection connecting rod, a long round rod, a bearing and a cylinder rotating rod. The bottom end of the transmission cylinder is rotatably connected to the heating shell through the cylinder rotating rod. A sliding groove long rod is rotatably installed on the output shaft of the transmission cylinder. The long round rod is installed in the heating shell. A detection rotating rod and a cylinder are movably installed on the long round rod. The cylinder is connected to the bottom end of the movable partition through the detection connecting rod. The detection rotating rod and the cylinder are connected through a bearing. A detection head is installed at one end of the detection rotating rod, and a sliding connecting rod is installed on the other side of the detection rotating rod. The sliding connecting rod is slidably connected to the sliding groove long rod.

[0020] After the blowing device is adjusted to a good position, the control system starts the air supply device to provide each blowing device with hot air flows of different temperatures. The hot air flows through the air supply device and blows on the surface of the polyurethane film. After each interval area is heated and dried by air flows of different temperatures, it is stretched by the clamping block to produce different elongations, thereby presenting different colors.

[0021] The detection head includes a detection housing, which is mounted on the detection rotating rod. An upper diaphragm and a lower diaphragm are mounted in the detection housing. A piezoelectric element is mounted between the upper diaphragm and the lower diaphragm. A terminal is mounted on the top of the piezoelectric element. The terminal runs through the upper diaphragm. A temperature conducting ring is mounted on the bottom of the detection housing. A lower spring and an upper spring are mounted on the temperature conducting ring. The upper spring is connected to the lower spring, and a contact head is mounted on the upper spring. The terminal is connected to the control system through a wire.

[0022] When the movable partition moves, the cylinder is driven to slide on the long round rod through the detection connecting rod, and the cylinder drives the detection rotating rods on both sides to move, so that the temperature detection mechanism is always located close to the movable partition, so that each time the temperature is detected, the edge of the polyurethane film can be detected, and the heating condition in the entire interval area can be judged by the temperature at the edge; when the temperature is heated to the first stage, the control system starts the transmission cylinder, the transmission cylinder output shaft extends, and drives the long rod of the slide slot to move, the long rod of the slide slot drives the detection rotating rod to rotate around the long round rod through the sliding connecting rod, and the detection rotating rod drives the detection head to rotate. After the detection head touches the heat insulation baffle, it pushes the heat insulation baffle to rotate until Until the detection head bypasses the heat insulation baffle, the detection rod finally rotates to a horizontal state, so that the detection head is just located on the surface of the polyurethane film and the detection head is located at the edge of the polyurethane film. The control system detects the edge temperature of the polyurethane film through the detection head, thereby analyzing the heating condition of the polyurethane film. When the temperature is too low or too high, the size of the hot air flow is changed to make the surface temperature of the polyurethane film reach the preset temperature. Then the control system controls the detection head to reset and cool the detection head in the cooling chamber. This step is repeated in each stage, so that each separation area on the surface of the polyurethane film is heated to the preset temperature, allowing the polyurethane film to show a gradient color after being stretched.

[0023] The upper spring piece and the lower spring piece are both made of a metal material with a relatively high thermal expansion coefficient, and the thermal expansion coefficient of the upper spring piece is smaller than the thermal expansion coefficient of the lower spring piece.

[0024] The upper spring sheet and the lower spring sheet are pressed together; when the detection head is attached to the surface of the polyurethane film, the temperature of the surface of the polyurethane film will be transmitted to the upper spring sheet and the lower spring sheet through the temperature conductive ring. When the upper spring sheet and the lower spring sheet are heated, the lower spring sheet with a high thermal expansion coefficient will bend toward the side of the upper spring sheet with a low thermal expansion coefficient. The upper spring sheet and the lower spring sheet will bend upward together, and drive the contact head to squeeze the lower diaphragm upward. The lower diaphragm transmits the squeezing force to the piezoelectric element. The piezoelectric element is compressed between the upper diaphragm and the lower diaphragm and produces a charge change. The changed charge forms an electric current and is transmitted to the control system from the terminal. The control system determines the temperature of the surface of the polyurethane film by the magnitude of the current.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, through the cooperation of the limiter and the electric clamp, allows the sliding partition assembly to adjust the spacing of its own moving partitions, and can also completely move the position of the entire sliding partition assembly, thereby achieving the goal that each partition area can be freely adjusted to different spacings, so that the area of ​​each gradient color area of ​​the polyurethane film can be electrically adjusted to meet the production needs of polyurethane films of different specifications; when the position of the moving partition changes, the blowing device is automatically adjusted to the center through the adjustment spring, and the air outlet area of ​​the air outlet is automatically adjusted by the connecting rod assembly, so that the blowing device can blow out a centered hot air flow with matching spacing according to the distance between the partitions.

[0026] When the movable partition moves, the temperature detection mechanism is driven by the detection connecting rod to slide along with the movable partition, so that the temperature detection mechanism is always located near the movable partition, so that the edge of the polyurethane film can be detected each time the temperature is detected; the temperature detection mechanism is used to detect the temperature at the edge of the polyurethane film, and the heating conditions in the overall spacing area are judged according to the temperature at the edge. When the temperature is too low or too high, the size of the hot air flow is changed to make the surface temperature of the polyurethane film reach the preset temperature, thereby ensuring that in each heating stage, each separation area on the surface of the polyurethane film is heated to the preset temperature, so that the surface of the polyurethane film shows a gradient color after being stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 is an overall elevational view of the heating device of the present invention;

[0029] Figure 2 is an internal elevation view of the heating device of the present invention;

[0030] Figure 3 is an elevational view of the blowing device and the sliding partition assembly of the present invention;

[0031] Figure 4 is an upper elevation view of the blowing device and the sliding partition assembly of the present invention;

[0032] Figure 5 is a lower elevational view of the blowing device and the sliding partition assembly of the present invention;

[0033] Figure 6 The present invention Figure 3 A detailed enlarged view of the A area in the middle;

[0034] Figure 7 It is the elevation intention of the temperature detection mechanism of the present invention;

[0035] Figure 8 is a cross-sectional elevation view of the detection head of the present invention;

[0036] In the figure: 1, heating shell; 2, driving motor; 3, blowing device; 4, sliding partition assembly; 5, fixed partition; 6, temperature detection mechanism; 7, fixed slide plate; 8, heat insulation baffle; 41, slide plate; 42, movable partition; 43, adjustment rod; 44, limiter; 45, threaded sleeve rod; 46, electric clamping block; 431, first adjustment section; 432, displacement section; 433, annular groove; 434, second adjustment section; 435, clamping section; 441, limit shell; 442, snap ring; 443, sliding rod; 444, sliding spring; 445, adsorption block; 446, electromagnetic block; 31, blowing shell; 32, connecting rod assembly; 33, adjustment spring; 3 4. Air inlet duct; 35. Swing blade assembly; 321. Connecting rod slide; 322. First connecting rod; 323. Second connecting rod; 324. T-type connecting rod; 351. Air outlet side plate; 352. Air outlet blade; 353. Swing blade connecting rod; 61. Long slide rod; 62. Sliding connecting rod; 63. Detection rotating rod; 64. Bearing; 65. Long round rod; 66. Transmission cylinder; 67. Cylinder rotating rod; 68. Detection head; 69. Detection connecting rod; 610. Cylinder; 681. Detection housing; 682. Terminal; 683. Upper diaphragm; 684. Piezoelectric element; 685. Lower diaphragm; 686. Temperature conducting ring; 687. Contact head; 688. Lower spring piece; 689. Upper spring piece. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figure 1-8 The present invention provides a technical solution: a heating device with a gradual drying function for the production of polyurethane film comprises a heating shell 1, a fixed partition 5 is symmetrically installed in the heating shell 1, a sliding partition assembly 4 is centrally symmetrically and slidably installed in the heating shell 1, a heat insulation baffle 8 is rotatably installed in the heating shell 1, a fixed slide plate 7 is slidably installed in the heating shell 1, a clamping block is installed on the fixed slide plate 7, a plurality of blowing devices 3 are slidably installed in the heating shell 1, the blowing devices 3 are respectively connected to the sliding partition assembly 4 and the fixed partition 5, a driving motor 2 is installed on the heating shell 1, the output shaft of the driving motor 2 passes through the heating shell 1 and is connected to the sliding partition assembly 4, a temperature detection mechanism 6 is rotatably installed inside the heating shell 1, and the sliding partition assembly 4 is connected to the temperature detection mechanism 6.

[0039] The clamping block on the fixed plate is used to clamp and fix the polyurethane film, and stretch the polyurethane film during the heating process; a control system is installed in the heating device, and the control system is used to control the entire heating device and analyze the received electrical signals. A cooling chamber is provided between the heating shell 1 and the heat insulation baffle 8. The cooling chamber is located on the side of the heat insulation baffle 8 away from the blowing device 3. Under normal conditions, the temperature detection mechanism 6 is located in the cooling chamber and is at a 90° angle to the fixed slide plate 7. It is isolated from the blowing device 3 by the heat insulation baffle 8 to prevent the hot air flow of the blowing device 3 from directly blowing the temperature detection mechanism 6 in the non-working state, so that the temperature detection mechanism 6 can be cooled in the cooling chamber, and the temperature detection mechanism 6 can return to the initial temperature measured, which is convenient for each temperature detection.

[0040] The sliding partition assembly 4 includes a slide plate 41 and a threaded sleeve rod 45. The slide plate 41 is slidably installed in the heating shell 1. The movable partitions 42 are symmetrically and slidably installed on the slide plate 41. The blowing device 3 is installed between the movable partitions 42. The blowing device 3 is installed between the movable partition 42 and the fixed partition 5. The threaded sleeve rod 45 is rotatably installed in the heating shell 1. The adjusting rod 43 is threadedly installed in the threaded sleeve rod 45. The adjusting rod 43 is threadedly connected to the movable partition 42. An electric clamp block 46 is slidably installed on the slide plate 41, and a limiter 44 is installed on the threaded sleeve rod 45.

[0041] The adjustment rod 43 is provided with a displacement section 432, which is threadedly connected to the threaded sleeve rod 45, and the displacement section 432 is provided with a plurality of equally spaced annular grooves 433, which are engaged with the stopper 44. The adjustment rod 43 is provided with a first adjustment section 431 and a second adjustment section 434, which are provided with mutually symmetrical threads, and the first adjustment section 431 and the second adjustment section 434 are both threadedly connected to the movable partition 42, and a clamping section 435 is provided between the first adjustment section 431 and the second adjustment section 434. The clamping section 435 has a square cross section, and when the electric clamping block 46 is brought close, it is engaged with the clamping section 435, so that the clamping section 435 cannot rotate.

[0042] The limiter 44 includes a limit shell 441 and a sliding spring 444. The limit shell 441 is installed on the threaded sleeve 45. A sliding rod 443 is slidably installed in the limit shell 441. One end of the sliding rod 443 passes through the sliding spring 444 and is installed with a retaining ring 442. An adsorption block 445 is installed on the retaining ring 442. An electromagnetic block 446 is installed on the limit shell 441. The retaining ring 442 is engaged with the annular groove 433.

[0043] The snap ring 442 is semicircular and can be fitted into the annular groove 433. Under normal conditions, the electric clamping blocks 46 are separated from each other, and the sliding rod 443, under the action of the sliding spring 444, drives the snap ring 442 to extend, so that the snap ring 442 is fitted into the annular groove 433. Under the restraining action of the snap ring 442, the adjustment rod 43 cannot be rotated and retracted in the threaded sleeve 45. At this time, the control system controls the drive motor 2 to rotate, and the output shaft of the drive motor 2 drives the threaded sleeve 45 to rotate. Since the adjustment rod 43 is restrained by the snap ring 442, the adjustment rod 43 is driven by the threaded sleeve 45 to rotate together. The rotation of the adjustment rod 43 drives the movable partition 42 to slide in the slide groove of the slide groove plate 41. The threads on the first adjustment section 431 and the second adjustment section 434 are symmetrically arranged, so the two movable partitions 42 move in opposite directions, approaching or moving away from each other, so as to achieve the purpose of adjusting the spacing between the movable partitions 42.

[0044] When the position of the slide plate 41 needs to be adjusted, the control system energizes the electromagnetic block 446, which generates magnetic force and absorbs the adsorption block 445. The adsorption block 445 drives the retaining ring 442 to overcome the elastic force of the sliding spring 444 and disengage from the engagement with the annular groove 433, so that the adjustment rod 43 can rotate and retract in the threaded sleeve 45. Then, the electric clamp block 46 is turned on, and the electric clamp block 46 moves and approaches until it is engaged with the clamping section 435, so that the adjustment rod 43 cannot rotate. Then, the control system turns on the drive motor 2, and the output shaft of the drive motor 2 drives the threaded sleeve 45 to rotate. Under the constraint of the electric clamp block 46, the adjustment rod 43 retracts and retracts in the threaded sleeve, thereby driving the slide plate 41 and the movable partition 42 to slide as a whole, thereby achieving the purpose of adjusting the position of the sliding partition assembly 4 as a whole.

[0045] The blowing device 3 includes a blowing shell 31 and a connecting rod assembly 32. Adjusting springs 33 are symmetrically installed on both sides of the blowing shell 31. One end of the adjusting spring 33 is respectively connected to the movable partition 42 or the fixed partition 5. An air inlet pipe 34 is provided at the top of the blowing shell 31. The air inlet pipe 34 is externally connected to an air supply device. A long strip air outlet is provided at the bottom end of the blowing shell 31. A swing blade assembly 35 is rotatably installed at the bottom end of the blowing shell 31. The swing blade assembly 35 is connected to the movable partition 42 or the fixed partition 5 through the connecting rod assembly 32.

[0046] An air inlet chamber is provided in the blowing shell 31, and the air inlet pipe 34 is connected to the air inlet chamber inside the blowing shell 31. The air supply device is used to transport airflows of different temperatures to the air inlet pipe 34. The airflow flows into the air inlet chamber of the blowing shell 31 through the air inlet pipe 34, and then flows out from the air outlet of the blowing shell 31, thereby forming a long strip of airflow to blow the surface of the polyurethane film.

[0047] The swing blade assembly 35 includes an air outlet side plate 351, which is installed at both ends of the air blowing housing 31, and an air outlet blade 352 is rotatably installed on the air outlet side plate 351, and a swing blade connecting rod 353 is rotatably installed between the air outlet blades 352, and the air outlet blades 352 are connected to the movable partition 42 or the fixed partition 5 through the connecting rod assembly 32. The connecting rod assembly 32 includes a connecting rod sliding groove 321 and a first connecting rod 322, the connecting rod sliding groove 321 is installed on the movable partition 42 or the fixed partition 5, and a T-shaped connecting rod 324 is slidably installed in the connecting rod sliding groove 321, and a second connecting rod 323 is installed on the air outlet blade 352, and the second connecting rod 323 is rotatably connected to the T-shaped connecting rod 324 through the first connecting rod 322.

[0048] The temperature detection mechanism 6 includes a transmission cylinder 66, a detection connecting rod 69, an elongated round rod 65, a bearing 64 and a cylinder rotating rod 67. The bottom end of the transmission cylinder 66 is rotatably connected to the heating shell 1 through the cylinder rotating rod 67. A sliding groove long rod 61 is rotatably installed on the output shaft of the transmission cylinder 66. The elongated round rod 65 is installed in the heating shell 1. A detection rotating rod 63 and a cylinder 610 are movably installed on the elongated round rod 65. The cylinder 610 is connected to the bottom end of the movable partition 42 through the detection connecting rod 69. The detection rotating rod 63 and the cylinder 610 are connected through a bearing 64. A detection head 68 is installed at one end of the detection rotating rod 63. A sliding connecting rod 62 is installed on the other side of the detection rotating rod 63. The sliding connecting rod 62 is slidably connected to the sliding groove long rod 61.

[0049] The detection head 68 includes a detection housing 681, which is mounted on the detection rotating rod 63. An upper diaphragm 683 and a lower diaphragm 685 are mounted in the detection housing 681. A piezoelectric element 684 is mounted between the upper diaphragm 683 and the lower diaphragm 685. A terminal 682 is mounted on the top of the piezoelectric element 684. The terminal 682 penetrates the upper diaphragm 683. A temperature conducting ring 686 is mounted on the bottom of the detection housing 681. A lower spring 688 and an upper spring 689 are mounted on the temperature conducting ring 686. The upper spring 689 is connected to the lower spring 688. A contact head 687 is mounted on the upper spring 689. The terminal 682 is connected to the control system through a wire.

[0050] The upper spring piece 689 and the lower spring piece 688 are both made of a metal material with a relatively high thermal expansion coefficient, and the thermal expansion coefficient of the upper spring piece 689 is smaller than the thermal expansion coefficient of the lower spring piece 688 . The upper spring piece 689 and the lower spring piece 688 are pressed together; when the detection head 68 is attached to the surface of the polyurethane film, the temperature of the surface of the polyurethane film will be transmitted to the upper spring piece 689 and the lower spring piece 688 through the temperature conductive ring 686. When the upper spring piece 689 and the lower spring piece 688 are heated, the lower spring piece 688 with a high thermal expansion coefficient will bend toward the side of the upper spring piece 689 with a low thermal expansion coefficient. The upper spring piece 689 and the lower spring piece 688 will bend upward together, and drive the contact head 687 to squeeze the lower diaphragm 685 upward. The lower diaphragm 685 transmits the squeezing force to the piezoelectric element 684. The piezoelectric element 684 is compressed between the upper diaphragm 683 and the lower diaphragm 685 and produces a charge change. The changed charge forms an electric current and is transmitted to the control system from the terminal 682. The control system determines the temperature of the surface of the polyurethane film by the magnitude of the current.

[0051] The working principle of the present invention is as follows: the staff pulls the fixed slide 7, and the fixed slide 7 slides along the slide groove on the inner wall of the heating shell 1. When the fixed slide 7 is pulled out, the two ends of the polyurethane film are fixed on the fixed slide 7 by the clamping block. Then, the surface of the polyurethane film is sprayed, and the fixed slide 7 with the polyurethane film fixed is pushed back into the interior of the heating shell 1.

[0052] The control system turns on the drive motor 2, and the drive motor 2 drives the sliding partition assembly 4 to first adjust the spacing of its own moving partition 42, and then completes the adjustment of the overall position of one group of sliding partition assemblies 4 through the cooperation of the limiter 44 and the electric block 46, so that the distance between one group of sliding partition assemblies 4 and the fixed partition 5 reaches a preset value, and then adjusts the spacing between another group of sliding partition assemblies 4 and the fixed partition 5, thereby completing the adjustment of the spacing between all partitions. The partition divides the surface of the polyurethane membrane into several areas, and the hot air flow heats and dries the surface of the polyurethane membrane in each area.

[0053] When the movable partition 42 is adjusted in position, the adjusting spring 33 is driven to expand and contract. When the expansion and contraction amounts of the adjusting springs 33 on both sides of the blowing shell 31 are inconsistent, different elastic forces will be generated. At this time, the adjusting spring 33 on the side with larger elastic force will pull the blowing shell 31 back, and the adjusting spring 33 on the side with smaller elastic force will be stretched again until the elastic stretching lengths of the adjusting springs 33 on both sides are consistent, so that the blowing shell 31 is always in the middle position of the two partitions; under the action of the connecting rod assembly 32, the swing blade assembly 35 moves along with the partition When the distance between the partitions changes, the movable partition 42 or the fixed partition 5 drives the T-type connecting rod 324 to move through the connecting rod slot 321, and the T-type connecting rod 324 drives the second connecting rod 323 to move through the first connecting rod 322, and the second connecting rod 323 drives the air outlet swing blade to move. The air outlet swing blades are linked by the swing blade connecting rod 353, so that the two groups of swing blade assemblies 35 at the bottom of the blowing shell 31 are opened and closed following the spacing between the partitions, so that the blowing device 3 can blow out hot air flows with corresponding spacings according to the distance between the partitions.

[0054] After the blowing device 3 is adjusted to a good position, the control system starts the air supply device to provide each blowing device 3 with hot air flows of different temperatures. The hot air flows through the air supply device and blows on the surface of the polyurethane film. After each interval area is heated and dried by air flows of different temperatures, it is stretched by the clamping block to produce different elongations, thereby presenting different colors.

[0055] When the movable partition 42 moves, the cylinder 610 is driven to slide on the long round rod 65 through the detection connecting rod 69, and the cylinder 610 drives the detection rotating rods 63 on both sides to move, so that the temperature detection mechanism 6 is always located close to the movable partition 42, so that each time the temperature is detected, the edge of the polyurethane film can be detected, and the heating condition in the entire interval area can be judged by the temperature at the edge; when the temperature is heated to the first stage, the control system starts the transmission cylinder 66, the output shaft of the transmission cylinder 66 extends, and drives the long rod 61 of the slide groove to move, and the long rod 61 of the slide groove drives the detection rotating rod 63 to rotate around the long round rod 65 through the sliding connecting rod 62, and the detection rotating rod 63 drives the detection head 68 to rotate, and the detection head 68 touches the heat insulation baffle 8 , pushing the heat insulation baffle 8 to rotate until the detection head 68 bypasses the heat insulation baffle 8, and finally the detection rotating rod 63 rotates to a horizontal state, just making the detection head 68 located on the surface of the polyurethane film, and the detection head 68 is located at the edge of the polyurethane film. The control system detects the edge temperature of the polyurethane film through the detection head 68, thereby analyzing the heating condition of the polyurethane film. When the temperature is too low or too high, the surface temperature of the polyurethane film reaches a preset temperature by changing the size of the hot air flow. Then the control system controls the detection head 68 to reset, so that the detection head 68 is cooled in the cooling chamber. This step is repeated in each stage, so that each separation area on the surface of the polyurethane film is heated to the preset temperature, so that the polyurethane film shows a gradient color after being stretched.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Finally, it should be noted that the above description 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, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heating device with a gradual drying function for the production of polyurethane film, characterized in that: The heating device comprises a heating shell (1), a fixed partition (5) is symmetrically installed in the heating shell (1), a sliding partition assembly (4) is symmetrically and slidably installed in the center of the heating shell (1), a heat insulation baffle (8) is rotatably installed in the heating shell (1), a fixed slide plate (7) is slidably installed in the heating shell (1), a clamping block is installed on the fixed slide plate (7), a plurality of blowing devices (3) are slidably installed in the heating shell (1), the blowing devices (3) are respectively connected to the sliding partition assembly (4) and the fixed partition (5), a driving motor (2) is installed on the heating shell (1), the output shaft of the driving motor (2) passes through the heating shell (1) and is connected to the sliding partition assembly (4), a temperature detection mechanism (6) is rotatably installed inside the heating shell (1), and the sliding partition assembly (4) is connected to the temperature detection mechanism (6); The sliding partition assembly (4) comprises a slide plate (41) and a threaded sleeve rod (45); the slide plate (41) is slidably mounted in the heating shell (1); a movable partition (42) is symmetrically and slidably mounted on the slide plate (41); a blowing device (3) is mounted between the movable partitions (42); a blowing device (3) is mounted between the movable partition (42) and the fixed partition (5); the threaded sleeve rod (45) is rotatably mounted in the heating shell (1); a positioning rod (43) is mounted in the inner thread of the threaded sleeve rod (45); the positioning rod (43) is threadedly connected to the movable partition (42); an electric clamp (46) is slidably mounted on the slide plate (41); and a limiter (44) is mounted on the threaded sleeve rod (45); The adjustment rod (43) is provided with a displacement section (432), the displacement section (432) is threadedly connected to the threaded sleeve rod (45), the displacement section (432) is provided with a plurality of equally spaced annular grooves (433), the annular grooves (433) are engaged with the stopper (44), the adjustment rod (43) is provided with a first adjustment section (431) and a second adjustment section (434), the first adjustment section (431) and the second adjustment section (434) are provided with mutually symmetrical threads, the first adjustment section (431) and the second adjustment section (434) are both threadedly connected to the movable partition (42), and a clamping section (435) is provided between the first adjustment section (431) and the second adjustment section (434).

2. The heating device with a gradual drying function for producing polyurethane film according to claim 1, characterized in that: The limiter (44) comprises a limit housing (441) and a sliding spring (444); the limit housing (441) is mounted on a threaded sleeve rod (45); a sliding rod (443) is slidably mounted in the limit housing (441); one end of the sliding rod (443) passes through the sliding spring (444) and is mounted with a snap ring (442); an adsorption block (445) is mounted on the snap ring (442); an electromagnetic block (446) is mounted on the limit housing (441); and the snap ring (442) is engaged with the annular groove (433).

3. The heating device with a gradual drying function for producing polyurethane film according to claim 1, characterized in that: The blowing device (3) comprises a blowing shell (31) and a connecting rod assembly (32). Adjustment springs (33) are symmetrically mounted on both sides of the blowing shell (31). One end of the adjustment spring (33) is respectively connected to a movable partition (42) or a fixed partition (5). An air inlet pipe (34) is arranged at the top of the blowing shell (31). The air inlet pipe (34) is externally connected to an air supply device. A long strip air outlet is arranged at the bottom of the blowing shell (31). A swing blade assembly (35) is rotatably mounted at the bottom of the blowing shell (31). The swing blade assembly (35) is connected to the movable partition (42) or the fixed partition (5) via a connecting rod assembly (32).

4. The heating device with a gradual drying function for producing polyurethane film according to claim 3, characterized in that: The swing blade assembly (35) comprises an air outlet side plate (351), the air outlet side plate (351) being mounted at both ends of the air blowing housing (31), air outlet blades (352) being rotatably mounted on the air outlet side plate (351), swing blade connecting rods (353) being rotatably mounted between the air outlet blades (352), and the air outlet blades (352) being connected to the movable partition plate (42) or the fixed partition plate (5) via the connecting rod assembly (32).

5. The heating device with a gradual drying function for producing polyurethane film according to claim 4, characterized in that: The connecting rod assembly (32) comprises a connecting rod slot (321) and a first connecting rod (322); the connecting rod slot (321) is mounted on a movable partition (42) or a fixed partition (5); a T-shaped connecting rod (324) is slidably mounted in the connecting rod slot (321); a second connecting rod (323) is mounted on the air outlet blade (352); and the second connecting rod (323) is rotatably connected to the T-shaped connecting rod (324) via the first connecting rod (322).

6. The heating device with a gradual drying function for producing polyurethane film according to claim 3, characterized in that: The temperature detection mechanism (6) comprises a transmission cylinder (66), a detection connecting rod (69), a long round rod (65), a bearing (64) and a cylinder rotating rod (67); the bottom end of the transmission cylinder (66) is rotatably connected to the heating shell (1) via the cylinder rotating rod (67); a sliding groove long rod (61) is rotatably mounted on the output shaft of the transmission cylinder (66); the long round rod (65) is mounted in the heating shell (1); a detection rotating rod (63) and a cylinder (610) are movably mounted on the long round rod (65); the cylinder (610) is connected to the bottom end of the movable partition (42) via the detection connecting rod (69); the detection rotating rod (63) and the cylinder (610) are connected via the bearing (64); a detection head (68) is mounted on one end of the detection rotating rod (63); a sliding connecting rod (62) is mounted on the other side of the detection rotating rod (63); the sliding connecting rod (62) is slidably connected to the sliding groove long rod (61).

7. The heating device with a gradual drying function for producing polyurethane film according to claim 6, characterized in that: The detection head (68) comprises a detection housing (681), wherein the detection housing (681) is mounted on the detection rotating rod (63), an upper diaphragm (683) and a lower diaphragm (685) are mounted in the detection housing (681), a piezoelectric element (684) is mounted between the upper diaphragm (683) and the lower diaphragm (685), a terminal (682) is mounted on the top of the piezoelectric element (684), and the terminal (682) passes through the upper diaphragm (683), a thermal conductive ring (686) is mounted on the bottom of the detection housing (681), a lower spring sheet (688) and an upper spring sheet (689) are mounted on the thermal conductive ring (686), the upper spring sheet (689) is connected to the lower spring sheet (688), and a contact head (687) is mounted on the upper spring sheet (689).

8. The heating device with a gradual drying function for producing polyurethane film according to claim 7, characterized in that: The upper spring sheet (689) and the lower spring sheet (688) are both made of a metal material with a relatively high thermal expansion coefficient, and the thermal expansion coefficient of the upper spring sheet (689) is smaller than the thermal expansion coefficient of the lower spring sheet (688).

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