Apparatus for measuring thickness of heat insulation cotton after hot pressing

Abstract

Disclosed in the present invention is an apparatus for measuring the thickness of heat insulation cotton after hot pressing. The apparatus comprises an inspection platform, and a conveyor belt used for conveying heat insulation cotton, wherein the conveyor belt closely passes over the top plane of the inspection platform. The apparatus further comprises: a thickness measurement assembly, which is used for measuring the thickness of the heat insulation cotton when the conveyor belt stops; and a surface inspection assembly, which comprises a laser scanning portion and an image collection portion, wherein the laser scanning portion obliquely emits a laser line to the surface of the heat insulation cotton and moves along the surface of the heat insulation cotton, and the image collection portion is located right above the heat insulation cotton and performs image collection on the trajectory of the laser line. The present invention can measure the thickness of heat insulation cotton by means of a thickness measurement assembly, and can further perform image collection on the trajectory of a laser line by means of an image collection portion, and therefore the surface quality of the heat insulation cotton can be inspected on the basis of a change in the laser line in an image, and then in combination with the measurement of the thickness of the heat insulation cotton, the range of heat insulation cotton inspection can be wider, and inspection results are also more objective.

Description

A device for detecting the thickness of thermal insulation cotton by hot pressing Technical Field

[0001] The present invention relates to the technical field of thermal insulation cotton detection, and in particular to a thermal insulation cotton hot pressing thickness detection device. Background Art

[0002] The thermal insulation cotton of the power battery is a material used to prevent thermal runaway of the battery cell and improve the ride quality of new energy vehicles. It is composed of a composite of PET film, silicone frame, aerogel, etc., and is processed by a vacuum hot press. It provides excellent protection against thermal runaway, line short circuit, and insulation. Even if the battery overheats, it will not generate sparks, smoke, or burn.

[0003] After the thermal insulation cotton is hot-pressed and formed, it is usually necessary to test the thermal insulation cotton to detect the quality of the thermal insulation cotton. For example, Chinese patent publication No. CN219723744U discloses a thermal insulation cotton thickness testing machine. This testing machine can conveniently and quickly measure the thickness of the thermal insulation cotton after gluing, and can operate continuously without stopping, which greatly reduces manpower consumption and improves the efficiency of thermal insulation cotton production. It is suitable for batch production and has strong practicality.

[0004] However, this equipment cannot detect the surface quality of the insulation cotton after hot pressing, and the surface quality of the insulation cotton PET film after hot pressing will also affect the performance of the insulation cotton, because the surface quality of the PET film is related to the change of the internal stress of the insulation cotton. Poor surface quality will also affect the overall quality of the insulation cotton. Therefore, only detecting the thickness of the insulation cotton will lead to certain limitations in the test results. Technical issues

[0005] The object of the present invention is to provide a device for detecting the thickness of thermal insulation cotton by hot pressing, so as to solve at least one technical problem existing in the above-mentioned prior art. Technical Solutions

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for detecting the thickness of thermal insulation cotton by hot pressing, comprising a detection platform, a conveyor belt for conveying thermal insulation cotton, and the conveyor belt passing through the top plane of the detection platform, and further comprising:

[0007] Thickness detection component, used to detect the thickness of the insulation cotton when the conveyor belt stops;

[0008] The surface detection component includes a laser scanning part and an image acquisition part. The laser scanning part emits a laser horizontal line at an angle toward the surface of the insulation cotton and moves along its surface. The image acquisition part is located directly above the insulation cotton and captures the image of the trajectory of the laser horizontal line.

[0009] Preferably, the thickness detection assembly includes three groups of cylinders installed on the top of the detection platform through a bracket, and the three groups of cylinders correspond to the two sides and the middle position of the thermal insulation cotton respectively. A pressure strip is fixed at the bottom end of the output shaft of the cylinder, and a trigger probe is installed on the side of the pressure strip.

[0010] Preferably, the surface detection component includes a gantry fixed on the top of the detection platform, and the gantry spans above the conveyor belt, the image acquisition part includes a fixed rod fixed to the bottom center of the gantry, and the bottom of the fixed rod is equipped with an image collector, the laser scanning part is provided with two groups, and is symmetrically arranged about the fixed rod, the laser scanning part includes a vertical rod fixed to the bottom of one side of the gantry, the bottom outer wall of the vertical rod is fixed with a fixed shaft, the outer wall of the fixed shaft is equipped with a gear that can rotate back and forth, the outer wall of the gear is fixed with a laser head, and the laser direction of the laser head is along the diameter direction of the gear.

[0011] Preferably, a telescopic cylinder is installed on the top of the gantry, the output shaft of the telescopic cylinder passes through the bottom of the gantry and is fixed with a casing, the top of the casing is provided with a through hole for the vertical rod and the fixed rod to pass through and slide, the bottom of the casing is provided with a sliding cavity, the inner wall of the sliding cavity is vertically slidably installed with a sliding frame, the top of the sliding frame is connected to the inner top of the sliding cavity by a spring, and the inner wall of the casing is provided with a rack, and when the sliding frame contacts the conveyor belt, the rack engages with the gear.

[0012] Preferably, a pressure plate is fixed to the inner bottom of the housing, and a pressure sensor is installed on the bottom surface of the pressure plate, a trigger point is installed on the outer wall of the fixed shaft, and a trigger switch is installed on the inner ring of the gear. The trigger switch controls the laser emitted by the laser head to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image collector, and when the pressure sensor detects a pressure signal, it controls the telescopic cylinder to stop extending and retracting.

[0013] Preferably, the laser receiver includes a detection block installed on the side of the image collector, an outer wall of the detection block is provided with an embedding groove, and a receiver is installed in the embedding groove, and the receiver has a plurality of laser receiving points arranged vertically.

[0014] Preferably, the outer wall of the sliding frame is provided with a ventilation hole, and the outer wall of the shell is respectively provided with an upper through hole and a lower through hole, and the upper through hole and the lower through hole are both located within the sliding range of the sliding frame. When the sliding frame slides in the shell, the ventilation hole is connected with the upper through hole or the lower through hole.

[0015] Preferably, a dimming glass is installed at the embedding groove of the detection block, and when the pressure sensor does not detect a pressure signal, the dimming glass is in a power-off state, and when the pressure sensor detects a pressure signal, the dimming glass is powered on.

[0016] Preferably, the outer plane of the switchable glass is set as a concave surface.

[0017] Preferably, the top surfaces of the detection platforms on both sides of the conveyor belt are installed with limit hooks, and the limit hooks enable the conveyor belt and the detection platform to always slide and fit together. Beneficial effects

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention uses a laser scanning unit to obliquely emit a laser horizontal line toward the surface of the thermal insulation cotton. When the laser horizontal line irradiates bubbles, depressions or wrinkles on the thermal insulation cotton, a part of the horizontal line will present a wavy arc. The laser horizontal line is then moved along the surface of the thermal insulation cotton. The image acquisition unit located above the thermal insulation cotton will capture an image of the trajectory of the laser horizontal line. The surface quality of the thermal insulation cotton can be detected based on the changes in the laser horizontal line in the image. The quality of the surface can also be judged based on the size of the wave. Combined with the measurement of the thickness of the thermal insulation cotton, the detection range of the thermal insulation cotton can be expanded and the detection results can be more objective. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the three-dimensional structure of a thickness detection assembly in a first embodiment of the present invention;

[0021] FIG2 is a schematic diagram of the three-dimensional structure of the surface detection component in the second embodiment of the present invention;

[0022] FIG3 is a sectional perspective view and a partially enlarged view of the housing and the sliding frame in the second embodiment of the present invention;

[0023] FIG4 is a cross-sectional view of the housing and the sliding frame in the second embodiment of the present invention;

[0024] FIG5 is a partial enlarged view of the gear in FIG4 of the present invention;

[0025] FIG6 is an enlarged cross-sectional view of the detection block in FIG4 of the present invention;

[0026] FIG7 is a simplified view of the present invention showing a laser horizontal line irradiating onto the thermal insulation cotton.

[0027] In the figure: 1. Detection platform; 2. Conveyor belt; 3. Insulation cotton; 4. Grabbing robot; 5. Gantry; 6. Housing; 7. Sliding frame; 8. Telescopic cylinder; 9. Fixed rod; 10. Image collector; 11. Vertical rod; 12. Fixed shaft; 13. Gear; 14. Laser head; 15. Rack; 16. Sliding cavity; 17. Pressing plate; 18. Pressure sensor; 19. Ventilation hole; 20. Upper through hole; 21. Lower through hole; 22. Trigger point; 23. Trigger switch; 24. Spring; 25. Detection block; 26. Receiver; 27. Laser receiving point; 28. Dimming glass; 29. ​​Cylinder; 30. Pressure strip; 31. Trigger probe; 32. Limit hook. Best Mode for Carrying Out the Invention

[0028] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Referring to FIG1 , the present invention provides a technical solution: a device for detecting the thickness of thermal insulation cotton by hot pressing, comprising a detection platform 1, a conveyor belt 2 for conveying thermal insulation cotton 3, and the conveyor belt 2 passing through the top plane of the detection platform 1, and further comprising:

[0030] Thickness detection component, used to detect the thickness of the insulation cotton 3 when the conveyor belt 2 stops;

[0031] The surface detection component includes a laser scanning part and an image acquisition part. The laser scanning part emits a laser horizontal line obliquely toward the surface of the thermal insulation cotton 3 and moves along its surface. The image acquisition part is located directly above the thermal insulation cotton 3 and captures the image of the trajectory of the laser horizontal line.

[0032] When the detection device is in use, the heat insulation cotton 3 after hot pressing is conveyed to the bottom of the thickness detection component by the conveyor belt 2 and the conveying is stopped. The thickness of the heat insulation cotton 3 is detected by the thickness detection component to detect the quality of the heat insulation cotton 3. At the same time, the forming quality of the hot pressing molding machine can also be reflected according to the thickness of the heat insulation cotton 3.

[0033] After the thickness detection is completed, a laser horizontal line is emitted obliquely toward the surface of the thermal insulation cotton 3 through the laser scanning unit. Due to the oblique irradiation of the laser, when the laser horizontal line irradiates the bubbles, depressions or wrinkles of the thermal insulation cotton 3, the part of the horizontal line will present a wavy arc, which can be specifically seen as L in Figure 7. Then the laser horizontal line is moved along the surface of the thermal insulation cotton 3, and then the image acquisition unit located above the thermal insulation cotton 3 will capture the trajectory of the laser horizontal line. The surface quality of the thermal insulation cotton 3 can be detected according to the changes of the laser horizontal line in the image, and the quality of the surface quality can also be judged according to the size of the wave. Combined with the measurement of the thickness of the thermal insulation cotton 3, the detection range of the thermal insulation cotton 3 can be made wider and the detection result more objective.

[0034] It is worth mentioning that, due to the oblique irradiation of the laser, the ripples presented by the laser horizontal lines will have an amplifying effect on the subtle defects on the surface of the thermal insulation cotton 3, so as to make the detection result more precise.

[0035] A grabbing robot 4 may also be provided at the unloading portion of the conveyor belt 2 , as shown in FIG1 , so as to differentiate and place the thermal insulation cottons 3 of different qualities and thicknesses.

[0036] Example 1 provides an implementation method for detecting the thickness of thermal insulation cotton;

[0037] The thickness detection component includes three groups of cylinders 29 installed on the top of the detection platform 1 through a bracket, and the three groups of cylinders 29 correspond to the two sides and the middle position of the thermal insulation cotton 3 respectively. A pressure strip 30 is fixed at the bottom end of the output shaft of the cylinder 29, and a trigger probe 31 is installed on the side of the pressure strip 30.

[0038] Referring to Figure 1, after the insulation cotton 3 is conveyed to the bottom of the pressure strip 30, the three groups of cylinders 29 are started to press the three pressure strips 30 downward, and the thickness of the three areas of the insulation cotton 3 are measured respectively. At the same time, the probe 31 is triggered to perform touch measurement and read the value to perform multi-point thickness measurement of the insulation cotton 3, so that the measurement result is more accurate. The trigger probe 31 can use a height sensor or a distance sensor, that is, the height of the insulation cotton 3 is measured by measuring the distance between the pressure strip 30 and the conveyor belt 2.

[0039] Example 2 provides an implementation method for detecting the surface quality of thermal insulation cotton, and also provides a second implementation method for detecting the thickness of thermal insulation cotton. For details, please refer to Figures 2-7;

[0040] The surface detection component includes a gantry 5 fixed on the top of the detection platform 1, and the gantry 5 spans above the conveyor belt 2. The image acquisition part includes a fixed rod 9 fixed at the center bottom of the gantry 5, and an image collector 10 is installed at the bottom of the fixed rod 9. The laser scanning part is provided with two groups, and is symmetrically arranged about the fixed rod 9. The laser scanning part includes a vertical rod 11 fixed at the bottom of one side of the gantry 5, and a fixed shaft 12 is fixed to the outer wall of the bottom of the vertical rod 11. The outer wall of the fixed shaft 12 is installed with a gear 13 that can rotate back and forth, and the outer wall of the gear 13 is fixed with a laser head 14, and the laser direction of the laser head 14 is along the diameter direction of the gear 13.

[0041] 4 , the gear 13 is driven to rotate by the external structure, so that the laser head 14 on it swings, so that the laser horizontal line emitted by the laser head 14 moves and scans on the surface of the thermal insulation cotton 3, and then the image collector 10 captures the image of the laser horizontal line;

[0042] Setting up two groups of laser scanning parts, on the one hand, can make the scanning ranges of the two laser heads 14 overlap each other, perform double detection on the insulation cotton 3, and avoid scanning blind spots, as shown in Figure 4; on the other hand, since the laser head 14 irradiates as the gear 13 rotates, the irradiation angle is different for different irradiation positions of the insulation cotton 3. The larger the irradiation angle, that is, the closer the irradiation position is to the gear 13, the smaller the fluctuation change produced by the laser horizontal line. Conversely, the farther the irradiation position is from the gear 13, the smaller the irradiation angle is, and the greater the fluctuation change produced by the laser horizontal line. The setting of the two groups of laser heads 14 can compensate each other, double irradiation of the same position, and the irradiation direction and angle are different, that is, the defective part at one position will have two different display states. In this way, the surface defect detection of the insulation cotton 3 can be more objective and accurate through image comparison of the two laser heads 14, and the detection quality is also higher.

[0043] Similarly, when the gear 13 rotates in the reverse direction, the thermal insulation cotton 3 can be scanned a second time.

[0044] In one of the more preferred embodiments, a reciprocating drive mode of the gear 13 is provided;

[0045] A telescopic cylinder 8 is installed on the top of the gantry 5. The output shaft of the telescopic cylinder 8 passes through the bottom of the gantry 5 and is fixed with a casing 6. A through hole is provided on the top of the casing 6 for the vertical rod 11 and the fixed rod 9 to pass through and slide. A sliding cavity 16 is provided at the bottom of the casing 6. A sliding frame 7 is vertically slidably installed on the inner wall of the sliding cavity 16. A spring 24 is connected between the top of the sliding frame 7 and the inner top of the sliding cavity 16. A rack 15 is installed on the inner wall of the casing 6. When the sliding frame 7 contacts the conveyor belt 2, the rack 15 engages with the gear 13.

[0046] 3 and 4 , when the thermal insulation cotton 3 is conveyed to the bottom of the sliding frame 7 along the conveyor belt 2, the output rod of the telescopic cylinder 8 extends and drives the housing 6 downward until the sliding frame 7 contacts the conveyor belt 2, so that the thermal insulation cotton 3 is placed in a lightless environment. Since the PET film has certain light transmittance and refraction, the lightless environment can reduce the interference of external light sources on the laser, and also facilitate the image collector 10 to capture the fine laser horizontal line, further improving the detection results.

[0047] When the sliding frame 7 contacts the conveyor belt 2, the housing 6 continues to move downward to cause the rack 15 to engage with the gear 13, thereby driving the gear 13 to rotate to complete the above-mentioned scanning process;

[0048] Similarly, when the housing 6 is reset, the rack 15 will also drive the gear 13 to rotate in the opposite direction to reset.

[0049] In one of the more preferred embodiments, a second implementation method for detecting the thickness of the thermal insulation cotton 3 is provided based on the above-mentioned embodiment 2;

[0050] A pressure plate 17 is fixed to the inner bottom of the housing 6, and a pressure sensor 18 is installed on the bottom surface of the pressure plate 17. A trigger point 22 is installed on the outer wall of the fixed shaft 12, and a trigger switch 23 is installed on the inner ring of the gear 13. The trigger switch 23 controls the laser emitted by the laser head 14 to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image collector 10. When the pressure sensor 18 detects a pressure signal, it controls the telescopic cylinder 8 to stop extending and retracting.

[0051] 3 and 5 , as can be seen from the previous content, the gear 13 will emit a laser horizontal line when it rotates and scan along the surface of the thermal insulation cotton 3. As the gear 13 rotates, the laser head 14 continues to rotate after scanning the thermal insulation cotton 3. The trigger switch 23 on the inner ring of the gear 13 will touch the trigger point 22, thereby converting the laser horizontal line emitted by the laser head 14 into a ray until it is irradiated on the laser receiver. Then, as the housing 6 continues to move downward, the pressure plate 17 will contact the thermal insulation cotton 3. At this time, the pressure sensor 18 detects a pressure signal, thereby controlling the telescopic cylinder 8 to stop telescoping, the housing 6 stops moving downward, and the gear 13 also stops rotating. In this way, the thickness of the thermal insulation cotton 3 can be detected by the position of the ray landing point emitted by the laser head 14 received by the laser receiver.

[0052] For example, when the laser beam emitted by the laser head 14 is in a horizontal state, that is, the landing point is at the center of the laser receiver, then the thickness of the thermal insulation cotton 3 is qualified. If the thickness of the thermal insulation cotton 3 is thicker, the laser landing point is located at the lower center of the laser receiver. On the contrary, if the thickness of the thermal insulation cotton 3 is thinner, the laser landing point is located at the upper center of the laser receiver. This detection method is more suitable for detecting whether the thermal insulation cotton 3 is within the qualified thickness range, and is also more suitable for batch detection.

[0053] In one of the more preferred embodiments, the laser receiver includes a detection block 25 installed on the side of the image collector 10. The outer wall of the detection block 25 is provided with a groove, and a receiver 26 is installed in the groove. The receiver 26 has a plurality of laser receiving points 27 arranged vertically.

[0054] Please refer to Figure 6 for details. By setting up multiple laser receiving points 27 on the receiver 26, different landing points of the laser can be received. The laser receiving point 27 can use a linear array of photodiodes, which can receive the laser irradiation point on a vertical line and determine its position.

[0055] In one of the more preferred embodiments, a ventilation hole 19 is opened on the outer wall of the sliding frame 7, and an upper through hole 20 and a lower through hole 21 are opened on the outer wall of the shell 6, respectively, and the upper through hole 20 and the lower through hole 21 are both located within the sliding range of the sliding frame 7. When the sliding frame 7 slides in the shell 6, the ventilation hole 19 is connected to the upper through hole 20 or the lower through hole 21.

[0056] After the heat-pressing is completed, although the air inside the heat-insulating cotton 3 can be squeezed out, there may still be residual air or moisture inside the heat-insulating cotton 3. The residual air is the cause of bubbles or wrinkles in the PET film. The upper and lower through holes and the ventilation holes 19 are used to create environments with different air pressures. The specific operation is as follows;

[0057] As can be seen from the previous content, after the cover 6 moves downward to make the sliding frame 7 contact with the conveyor belt 2, the cover 6 continues to move downward to stagger the ventilation hole 19 and the lower through hole 21, thereby forming a closed space in the cover 6. As the cover 6 continues to move downward, the space inside the cover 6 is compressed, causing the air pressure to gradually increase, thereby forming a high-pressure environment. Under the high-pressure environment, the gas inside the thermal insulation cotton will shrink, so that the bubbles in the PET film will shrink, and the raised part may also appear wrinkled due to the compression of the air, thereby making the waveform of the laser horizontal line more obvious during laser scanning;

[0058] Then, until the pressing plate 17 contacts the heat-insulating cotton 3, the ventilation hole 19 is connected with the upper through hole 20, so that the casing 6 is connected with the outside world, and the internal high-pressure environment is released;

[0059] When the shell 6 is reset and moved, due to the setting of the spring 24, the sliding frame 7 will first press on the conveyor belt 2, and as the shell 6 moves upward, the spring 24 gradually recovers, and the upward movement of the shell 6 will again make the ventilation hole 19 staggered with the upper through hole 20, and as the shell 6 moves upward, its internal change is a negative pressure state, and in the negative pressure state, the air inside the thermal insulation cotton 3 expands, thereby causing the air under the PET film of the thermal insulation cotton 3 to expand, and then making its raised part protrude more, and along with the reset rotation of the gear 13, the laser head 14 will scan the surface of the thermal insulation cotton 3 again, and the image collector 10 will collect images again. In this way, the two images are collected under different pressure environments, and the defects at the same position will change. According to the comparison of the two images, the residual degree of air in the thermal insulation cotton 3 can also be detected, and the performance quality of the thermal insulation cotton 3 can be detected.

[0060] It is worth mentioning that in order to prevent the sliding frame 7 from easily separating from the conveyor belt 2, a magnetic frame can be installed at the bottom of the sliding frame 7 and a magnetic strip can be installed inside the conveyor belt 2.

[0061] In one of the more preferred embodiments, a dimming glass 28 is installed at the embedding groove of the detection block 25, and when the pressure sensor 18 does not detect a pressure signal, the dimming glass 28 is in a power-off state, and when the pressure sensor 18 detects a pressure signal, the dimming glass 28 is powered on.

[0062] By setting up the dimming glass 28, the laser beam can be prevented from directly irradiating the laser receiving point 27. Only when the pressure sensor 18 detects the pressure signal, that is, the housing 6 stops moving downward, the gear 13 and the laser head 14 stop rotating, and the dimming glass 28 is powered on and becomes transparent, can the laser beam penetrate and fall on the laser receiving point 27 for reception, thereby avoiding the phenomenon of erroneous reception or unclear receiving point.

[0063] Moreover, it is worth mentioning that, through the setting of the dimming glass 28, if the height of the two sides of the formed insulation cotton 3 is uneven, then when the shell 6 moves downward, it may be that only the pressure sensor 18 on the pressure plate 17 on one side is triggered, then only one side of the dimming glass 28 will become translucent, and the corresponding laser receiving point 27 can receive the laser signal. In this way, by whether the laser receiving points 27 in the two detection blocks 25 can receive the signal or not, it is also possible to detect whether the thickness of the two sides of the insulation cotton 3 is uniform, thereby further improving the detection accuracy.

[0064] In one of the more preferred embodiments, the outer surface of the switchable glass 28 is configured as a concave surface.

[0065] 6 , by setting the concave transparent surface and utilizing its outward refraction, the distance between the laser landing points can be increased, thereby detecting more subtle gaps and making the detection results more precise.

[0066] In one of the more preferred embodiments, the top surfaces of the detection platforms 1 located on both sides of the conveyor belt 2 are both installed with limiting hooks 32, and the limiting hooks 32 ensure that the conveyor belt 2 and the detection platform 1 always slide and fit together.

[0067] 2 , the conveyor belt 2 can be limited by the provision of the limiting hook 32 to prevent the housing 6 and the sliding frame 7 from lifting the conveyor belt 2 when they move upward.

[0068] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and drawings can also be directly processed according to existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so no specific description will be given here. Modes for Carrying Out the Invention

[0069] Type here a paragraph describing embodiments of the invention. Industrial Applicability

[0070] Type your industrial applicability description paragraph here. Sequence Listing Free Content

[0071] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the thickness of thermal insulation cotton by hot pressing, comprising a detection platform (1), and also comprising a conveyor belt (2) for conveying thermal insulation cotton (3), wherein the conveyor belt (2) passes through the top plane of the detection platform (1), characterized in that: Also includes: A thickness detection component, used to detect the thickness of the thermal insulation cotton (3) when the conveyor belt (2) stops; The surface detection component comprises a laser scanning unit and an image acquisition unit, wherein the laser scanning unit emits a laser horizontal line obliquely toward the surface of the thermal insulation cotton (3) and moves along the surface, and the image acquisition unit is located directly above the thermal insulation cotton (3) and acquires an image of the trajectory of the laser horizontal line.

2. The thermal insulation wool hot pressing thickness detection device according to claim 1 is characterized in that: The thickness detection assembly comprises three groups of cylinders (29) mounted on the top of the detection platform (1) via a bracket, and the three groups of cylinders (29) correspond to the two sides and the middle position of the heat insulation cotton (3), respectively, a pressure strip (30) is fixed to the bottom end of the output shaft of the cylinder (29), and a trigger probe (31) is installed on the side of the pressure strip (30).

3. The thermal insulation wool hot pressing thickness detection device according to claim 1 is characterized in that: The surface detection component comprises a gantry (5) fixed on the top of the detection platform (1), and the gantry (5) spans above the conveyor belt (2); the image acquisition unit comprises a fixed rod (9) fixed at the center bottom of the gantry (5), and an image acquisition device (10) is installed at the bottom of the fixed rod (9); the laser scanning unit is provided with two groups, and is symmetrically arranged with respect to the fixed rod (9); the laser scanning unit comprises a vertical rod (11) fixed at the bottom of one side of the gantry (5), a fixed shaft (12) is fixed to the outer wall of the bottom of the vertical rod (11), a reciprocating gear (13) is installed on the outer wall of the fixed shaft (12), a laser head (14) is fixed to the outer wall of the gear (13), and the laser direction of the laser head (14) is along the diameter direction of the gear (13).

4. The thermal insulation wool hot pressing thickness detection device according to claim 3 is characterized in that: A telescopic cylinder (8) is installed on the top of the gantry (5), the output shaft of the telescopic cylinder (8) passes through the bottom of the gantry (5) and is fixed with a casing (6), the top of the casing (6) is provided with a through hole for a vertical rod (11) and a fixed rod (9) to pass through and slide, the bottom of the casing (6) is provided with a sliding cavity (16), the inner wall of the sliding cavity (16) is vertically slidably installed with a sliding frame (7), the top of the sliding frame (7) and the inner top of the sliding cavity (16) are connected with a spring (24), the inner wall of the casing (6) is provided with a rack (15), when the sliding frame (7) contacts the conveyor belt (2), the rack (15) meshes with the gear (13).

5. The thermal insulation wool hot pressing thickness detection device according to claim 4 is characterized in that: A pressure plate (17) is fixed to the bottom inner side of the housing (6), and a pressure sensor (18) is installed on the bottom surface of the pressure plate (17). A trigger point (22) is installed on the outer wall of the fixed shaft (12). A trigger switch (23) is installed on the inner ring of the gear (13). The trigger switch (23) controls the laser emitted by the laser head (14) to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image collector (10). When the pressure sensor (18) detects a pressure signal, the telescopic cylinder (8) is controlled to stop telescoping.

6. The thermal insulation wool hot pressing thickness detection device according to claim 5 is characterized in that: The laser receiver comprises a detection block (25) mounted on the side of the image collector (10), the outer wall of the detection block (25) is provided with an embedding groove, and a receiver (26) is installed in the embedding groove, and the receiver (26) has a plurality of laser receiving points (27) arranged vertically.

7. The thermal insulation wool hot pressing thickness detection device according to claim 4 is characterized in that: The outer wall of the sliding frame (7) is provided with a ventilation hole (19), and the outer wall of the casing (6) is provided with an upper through hole (20) and a lower through hole (21), respectively. The upper through hole (20) and the lower through hole (21) are both located within the sliding range of the sliding frame (7). When the sliding frame (7) slides in the casing (6), the ventilation hole (19) is communicated with the upper through hole (20) or the lower through hole (21).

8. The thermal insulation wool hot pressing thickness detection device according to claim 6 is characterized in that: A dimming glass (28) is installed at the embedding groove of the detection block (25), and when the pressure sensor (18) does not detect a pressure signal, the dimming glass (28) is in a power-off state, and when the pressure sensor (18) detects a pressure signal, the dimming glass (28) is powered on.

9. The thermal insulation wool hot pressing thickness detection device according to claim 8 is characterized in that: The outer plane of the dimming glass (28) is set as a concave transparent surface.

10. The thermal insulation wool hot pressing thickness detection device according to any one of claims 1 to 9, characterized in that: Limiting hooks (32) are installed on the top surfaces of the detection platforms (1) located on both sides of the conveyor belt (2), and the limiting hooks (32) enable the conveyor belt (2) and the detection platform (1) to always slide and fit together.

Images