Transportation safety experiment device

By designing the L-shaped bin plate and sensor structure, the deficiencies in deformation detection in hot melt film stacking transportation are solved, and the stackable quantity and temperature monitoring of hot melt film are achieved to ensure transportation quality and detection accuracy.

CN223228997UActive Publication Date: 2025-08-15HEBEI ZHENFENG INFORMATION TECH CO LTD
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Patent Information

Application Number
CN202422392270.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2025-08-15
Estimated Expiration
2034-09-30

AI Technical Summary

Technical Problem

The prior art lacks a test structure for gravity extrusion of hot melt adhesives during stacking transportation, which causes different quality and brands of hot melt adhesives to deform under pressure and affect their quality, and frequent weighing and testing is inconvenient.

Method used

A transportation safety experimental device is designed, including an L-shaped bin plate, a pneumatic telescopic rod, a fixed plate, a pressure sensor and a temperature sensor. The fixing plate and the pressure plate are pushed down the hot melt film by the pneumatic telescopic rod, the pressure sensor is used to detect the degree of deformation, and the temperature uniformity is monitored through the temperature sensor to achieve the judgment of the stackable number of hot melt films.

Benefits of technology

The deformation degree of hot melt film is detected under different pressures, ensuring the reliability of quality during transportation, and improving the accuracy of detection through temperature sensors, avoiding the influence of uneven temperatures, and providing closed and observation functions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of hot melt adhesive sheet detection, and provides a transportation safety experiment device which comprises an L-shaped bin plate, the L-shaped bin plate is in an inverted L shape, the bottom of a top plate of the L-shaped bin plate is fixedly connected with a pneumatic telescopic rod, and the bottom of the pneumatic telescopic rod is fixedly connected with a fixing plate. A plurality of fixing blocks are evenly distributed at the outer ring position of the bottom of the fixing plate, the bottoms of the fixing blocks are fixedly connected with a pressing plate, the bottom of the fixing plate is fixedly connected with a pressure sensor, the fixing plate and the pressing plate can be pushed to press downwards after a pneumatic telescopic rod is started, and the pressing plate presses a hot melt adhesive sheet downwards; the pressure sensor detects the downward pressure, so that the deformation degree of the hot melt adhesive sheets under different pressures can be detected, the stackable number of the hot melt adhesive sheets with different qualities and batches can be judged, and the experiment process can be observed by the monitor on one side.
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Description

Technical Field

[0001] The utility model relates to the technical field of hot melt film detection, in particular to a transportation safety experimental device. Background Art

[0002] Hot melt adhesive sheet is a sheet made of low molecular weight thermoplastic material mixed with various additives. It is usually melted by hot melt equipment and applied to objects that need to be bonded, sealed or packaged. After cooling, it will form a solid. Hot melt sheet is widely used in many fields, such as furniture, shoes, toys, electronic products, automobiles, textiles, etc. Its main function is to be used for bonding, sealing or packaging. It is fast, convenient, efficient and environmentally friendly.

[0003] After searching, the existing patent (CN 209842930 U) discloses a transportation safety experimental device for hot melt film transportation quality safety experimental device, including an experimental box, a movable cover fixedly installed on one side of the top of the experimental box, the top of the movable cover is threadedly connected to the other side of the top of the experimental box by a fixing bolt, a screw is movably sleeved inside the experimental box, one end of the screw is fixedly sleeved on the output shaft of the forward and reverse motor, the forward and reverse motor is electrically connected to the mains circuit, and the forward and reverse motor is fixedly mounted inside the protective cover, the protective cover is fixedly mounted on the bottom of one side of the experimental box, the external thread of the screw is sleeved with a threaded sleeve, the internal movability of the threaded sleeve is sleeved with a positioning rod, and the top of the threaded sleeve is fixedly connected to a placement table, and a heating plate is fixedly mounted on the inner wall of the experimental box. Through the heating plate, power cord, temperature sensor, connecting wire and temperature display, this utility model can effectively simulate the influence of temperature on hot melt film during transportation, so as to accurately determine the temperature range suitable for the hot melt film and ensure the transportation quality and safety of the hot melt film.

[0004] However, in the above scheme, there are certain limitations in the transportation inspection of hot melt adhesive. Usually, in the transportation process, stacking transportation is often required to ensure transportation efficiency. The hot melt adhesive itself has a certain weight during the stacking transportation. When it reaches the softening point but not the melting point, hot melt adhesive sheets of different qualities are under the pressure of the upper layer of colloid. The stacked layers of hot melt adhesive are prone to deformation, affecting the quality. It is more troublesome to frequently weigh and stack hot melt adhesives of different qualities and brands in the experiment, so there is a lack of gravity extrusion test structure.

[0005] In view of this, the utility model proposes a transportation safety experiment device. Utility Model Content

[0006] The utility model provides a transportation safety experiment device, which solves the problem of lack of gravity pressing test function in the related art.

[0007] The technical solution of the utility model is as follows: a transportation safety experimental device, comprising an L-shaped warehouse plate: the L-shaped warehouse plate is an inverted L-shape, the bottom of the top plate of the L-shaped warehouse plate is fixedly connected to a pneumatic telescopic rod, the bottom of the pneumatic telescopic rod is fixedly connected to a fixed plate, a plurality of fixed blocks are evenly distributed on the outer ring position of the bottom of the fixed plate, the bottom of the fixed block is fixedly connected to the pressure plate, the bottom of the fixed plate is fixedly connected to a pressure sensor, the pressure sensing end of the pressure sensor is in contact with the upper surface of the pressure plate, the side plate of the L-shaped warehouse plate perpendicular to the ground is fixedly connected to a conveying warehouse, a conveying mechanism is provided inside the conveying warehouse, a side plate inside the conveying warehouse is fixedly connected to a monitor, and an insertion groove is provided on the top of the fixed plate, and the insertion groove The inside of the groove is plugged in and connected with a temperature sensor, and a hot fan is fixedly connected to the middle of the side plate of the L-shaped warehouse plate that is perpendicular to the ground, and the hot fan is located above the monitor, and the conveying warehouse is located directly below the top plate of the L-shaped warehouse plate. The L-shaped warehouse plate and the conveying warehouse are combined into an experimental warehouse structure with three open sides, wherein the two opposite sides are respectively provided with an outer flip plate one and an outer flip plate two, and the other side is provided with a transparent glass plate. The pneumatic telescopic rod can push the fixed plate and the pressure plate downward after startup, and the pressure plate presses down the hot melt film, and the downward pressure is detected by the pressure sensor, thereby detecting the degree of deformation of the hot melt film under different pressures, thereby judging the stackable number of hot melt films of different qualities and batches, and the experimental process can be observed by the monitor on one side.

[0008] Preferably, the temperature sensors are evenly distributed inside the fixed plate, and the sensing end of the temperature sensor is located above the fixed plate. The set temperature sensor can detect the temperature near the hot melt film position during the pressing process, thereby avoiding the uneven temperature in the warehouse affecting the detection accuracy.

[0009] Preferably, the vertical projection area of the top plate of the L-shaped warehouse plate is equal to the floor area of the bottom plate of the L-shaped warehouse plate, which can realize the cabin combination of the L-shaped warehouse plate and the feed plate, and is convenient for closing both sides.

[0010] Preferably, the conveying mechanism includes a feed plate, a discharge plate, a conveyor belt and a support plate, the feed plate and the discharge plate are located on both sides of the interior of the conveying bin, the conveyor belt is located between the feed plate and the discharge plate, the conveyor belt is fixed to the interior of the conveying bin for transmission, a support plate is provided inside the conveyor belt, the top surface of the support plate is in contact with the bottom of the upper transmission surface of the conveyor belt, the upper transmission surface of the conveyor belt is located on the top of the support plate for sliding transmission, and the two ends of the support plate are fixedly connected to the inner walls of both sides of the conveying bin, and the feed plate, the discharge plate and the conveyor belt can be provided with a process of feeding by the feed plate, conveying by the conveyor belt and discharging by the discharge plate, and the support plate can be provided to support the conveyor belt during detection, thereby preventing the conveyor belt from being affected by deformation and affecting the pressure detection effect.

[0011] Preferably, the tops of the outer flap one and the outer flap two are rotatably connected to the two sides of the L-shaped warehouse plate top plate through hinges respectively, and the top of the outer flap one facing the warehouse is fixedly connected with a spring telescopic rod, and the angle between the spring telescopic rod and the outer flap one is 45°. The extended end of the spring telescopic rod contacts the bottom of the L-shaped warehouse plate top plate, and the outer flap one can be pushed outward in the opposite direction by starting the spring telescopic rod. After feeding, the outer flap one shrinks and rotates under the action of gravity, so that one side of the warehouse can be closed.

[0012] Preferably, an electromagnetic lock is fixedly connected to one side of the outer flap 2, and the electromagnetic lock acts on the outer flap 2 and one end of the L-shaped warehouse side panel. The transparent glass plate is thermal insulation glass. The other side of the warehouse can be closed by the set electromagnetic lock to form a closed warehouse space that can be observed from one side, which is convenient for testing.

[0013] Preferably, the transmission motor of the conveyor belt is located on the outer side of the vertical side plate of the L-shaped warehouse plate, and the outer sleeve of the conveyor belt is provided with a motor box, which is a rectangular frame with hollow sides. Fans are fixedly connected to both sides of the motor box. The fans are arranged to dissipate heat for the motor inside the motor box, thereby preventing the high temperature generated by the operation of the motor from being transmitted into the warehouse through the output shaft and affecting the interior of the warehouse.

[0014] Preferably, both ends of the fixing block are fixedly connected to the fixing plate and the pressing plate respectively.

[0015] The beneficial effects of the utility model are:

[0016] In this utility model, the pneumatic telescopic rod is configured to push the fixed plate and the pressure plate downward after activation. The pressure plate presses the hot melt adhesive sheet downward, and the pressure sensor detects the downward pressure. The deformation degree of the hot melt adhesive sheet under different pressures can be detected, thereby determining the stackable quantity of hot melt adhesive sheets of different qualities and batches. The experimental process can be observed by a monitor on one side.

[0017] In the present invention, the temperature sensor is set to detect the temperature near the hot melt film position during the pressing process, so as to avoid the uneven temperature in the warehouse affecting the accuracy of the detection. The feed plate, discharge plate and conveyor belt are set to realize the process of feeding by the feed plate, conveying by the conveyor belt and discharging by the discharge plate. The support plate is set to support the conveyor belt during the detection process, so as to avoid the deformation of the conveyor belt affecting the pressure detection effect.

[0018] In the utility model, the spring telescopic rod can be activated to push the outer flap in the opposite direction to flip outward. After feeding, the outer flap shrinks and rotates under the action of gravity, which can close one side of the warehouse. The electromagnetic lock on one side can close the other side of the warehouse, forming a closed warehouse space that can be observed on one side, which is convenient for testing. The fan can dissipate heat for the motor inside the motor box, avoiding the high temperature generated by the motor operation from being transmitted into the warehouse through the output shaft and affecting the warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a schematic diagram of the internal three-dimensional structure of the utility model when viewed from one side;

[0021] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the utility model when viewed from the other side;

[0022] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the utility model when viewed from above;

[0023] Figure 4 This is a schematic diagram of the internal structure of the utility model from the side;

[0024] Figure 5 For the utility model Figure 4 A in the middle is an enlarged structural diagram;

[0025] Figure 6 This is a schematic diagram of the internal structure of the main view of the present invention.

[0026] In the figure: 1. L-shaped warehouse plate; 2. Conveyor warehouse; 3. Feed plate; 4. Discharge plate; 5. Conveyor belt; 6. Support plate; 7. Monitoring; 8. Pneumatic telescopic rod; 9. Fixed plate; 10. Fixed block; 11. Pressing plate; 12. Pressure sensor; 13. Insertion slot; 14. Temperature sensor; 15. Outer flap 1; 16. Spring telescopic rod; 17. Heat fan; 18. Outer flap 2; 19. Electromagnetic lock; 20. Motor box; 21. Fan; 22. Transparent glass plate. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention. Example 1

[0028] A preferred embodiment of the transportation safety experiment device provided by the utility model is as follows Figures 1 to 6 As shown: A transportation safety experimental device, including an L-shaped warehouse board 1: the L-shaped warehouse board 1 is an inverted L-shape, the bottom of the top plate of the L-shaped warehouse board 1 is fixedly connected to a pneumatic telescopic rod 8, the bottom of the pneumatic telescopic rod 8 is fixedly connected to a fixed plate 9, a plurality of fixed blocks 10 are evenly distributed on the outer ring position of the bottom of the fixed plate 9, the bottom of the fixed block 10 is fixedly connected to a pressure plate 11, the bottom of the fixed plate 9 is fixedly connected to a pressure sensor 12, the pressure sensing end of the pressure sensor 12 is in contact with the upper surface of the pressure plate 11, the side plate of the L-shaped warehouse board 1 perpendicular to the ground is fixedly connected to a conveying warehouse 2, the conveying warehouse 2 A conveying mechanism is provided inside, and a monitor 7 is fixedly connected to one side plate inside the conveying bin 2. A plug-in slot 13 is provided on the top of the fixed plate 9, and a temperature sensor 14 is plugged in and connected to the inside of the plug-in slot 13. A hot fan 17 is fixedly connected to the middle of the side plate of the L-shaped bin plate 1 perpendicular to the ground, and the hot fan 17 is located above the monitor 7. The conveying bin 2 is located directly below the top plate of the L-shaped bin plate 1. The L-shaped bin plate 1 and the conveying bin 2 are combined into an experimental bin structure with three sides open, wherein the two opposite sides are respectively provided with an outer flip plate 15 and an outer flip plate 2 18, and the other side is provided with a transparent glass plate 22.

[0029] It should be noted that the existing transportation safety test device still has certain shortcomings in actual use. It can only test hot melt adhesives in a high-temperature hot melt state, and is not convenient for testing the softening point of hot melt adhesives in stacked transportation, which has certain limitations.

[0030] In this embodiment, the pneumatic telescopic rod 8 is set to push the fixed plate 9 and the pressure plate 11 downward after startup. The pressure plate 11 presses the hot melt adhesive sheet downward, and the pressure sensor 12 detects the downward pressure. The deformation degree of the hot melt adhesive sheet under different pressures can be detected, thereby judging the stackable number of hot melt adhesive sheets of different qualities and batches. The experimental process can be observed by the monitor 7 on one side.

[0031] In a further preferred embodiment of the present invention, the temperature sensors 14 are evenly distributed inside the fixing plate 9 , and the sensing ends of the temperature sensors 14 are located above the fixing plate 9 .

[0032] In this embodiment, the temperature sensor 14 is provided to detect the temperature near the hot melt adhesive sheet during the pressing process, thereby preventing the uneven temperature in the chamber from affecting the detection accuracy.

[0033] In a further preferred embodiment of the present invention, the vertical projection area of the top plate of the L-shaped storage board 1 is equal to the floor area of the bottom plate of the L-shaped storage board 1 .

[0034] In this embodiment, the cabin body combination of the L-shaped warehouse plate 1 and the feed plate 3 can be realized, which facilitates closing of both sides.

[0035] In a further preferred embodiment of the present invention, the conveying mechanism includes a feed plate 3, a discharge plate 4, a conveyor belt 5 and a support plate 6. The feed plate 3 and the discharge plate 4 are located on both sides of the interior of the conveying bin 2, and the conveyor belt 5 is located between the feed plate 3 and the discharge plate 4. The conveyor belt 5 is fixed to the internal transmission of the conveying bin 2. A support plate 6 is provided inside the conveyor belt 5. The top surface of the support plate 6 is in contact with the bottom of the upper transmission surface of the conveyor belt 5. The upper transmission surface of the conveyor belt 5 is located on the top of the support plate 6 for sliding transmission. The two ends of the support plate 6 are fixedly connected to the inner walls on both sides of the conveying bin 2.

[0036] In this embodiment, the feed plate 3, the discharge plate 4 and the conveyor belt 5 are provided, so that the feed plate 3 can be used to feed the material, the conveyor belt 5 can be used to convey the material, and the discharge plate 4 can be used to discharge the material. The support plate 6 provided can support the conveyor belt 5 during the detection process, thereby preventing the conveyor belt 5 from being affected by deformation and affecting the pressure detection effect. Example 2

[0037] On the basis of Example 1, a preferred embodiment of a transportation safety experiment device provided by the present invention is as follows: Figures 1 to 6 As shown: the tops of the outer flap 15 and the outer flap 2 18 are respectively rotatably connected to the two sides of the top plate of the L-shaped warehouse plate 1 through hinges, and the top of the outer flap 15 facing the warehouse is fixedly connected to a spring telescopic rod 16. The angle between the spring telescopic rod 16 and the outer flap 15 is 45°, and the extended end of the spring telescopic rod 16 contacts the bottom of the top plate of the L-shaped warehouse plate 1.

[0038] In this embodiment, the spring telescopic rod 16 can be activated to push the outer flap 15 in the opposite direction to flip outward. After feeding, the outer flap 15 shrinks and rotates under the action of gravity, thereby closing one side of the warehouse.

[0039] In a further preferred embodiment of the present invention, an electromagnetic lock 19 is fixedly connected to one side of the outer flap 18, and the electromagnetic lock 19 acts on the outer flap 18 and one end of the side plate of the L-shaped warehouse plate 1, and the transparent glass plate 22 is insulating glass.

[0040] In this embodiment, the electromagnetic lock 19 is provided to seal the other side of the chamber, forming a closed chamber space that can be observed from one side, which is convenient for testing.

[0041] In a further preferred embodiment of the present invention, the transmission motor of the conveyor belt 5 is located on the outer side of the vertical side plate of the L-shaped warehouse plate 1, and the outer sleeve of the conveyor belt 5 is provided with a motor box 20. The motor box 20 is a rectangular frame with hollow sides, and fans 21 are fixedly connected to both sides of the motor box 20.

[0042] In this embodiment, the fan 21 is provided to dissipate heat from the motor inside the motor box 20, thereby preventing the high temperature generated by the motor from being transmitted into the compartment through the output shaft and affecting the interior of the compartment.

[0043] In a further preferred embodiment of the present invention, both ends of the fixing block 10 are fixedly connected to the fixing plate 9 and the pressing plate 11 respectively.

[0044] In this embodiment, the fixing plate 9 and the pressing plate 11 are connected by the fixing block 10 to achieve stable fixation of the pressing plate 11 and the fixing plate 9 .

[0045] The working principle of this utility model is as follows: first, the spring telescopic rod 16 is started to push the outer flap 15 outward in the opposite direction after feeding. The outer flap 15 is retracted under the action of gravity after feeding, and one side of the warehouse is closed. The electromagnetic lock 19 locks the other side of the warehouse to close it, forming a closed warehouse space, which is convenient for testing. The feeding plate 3 is used for feeding, and the conveyor belt 5 is used for transportation and testing to realize the feeding and transportation process. After starting the pneumatic telescopic rod 8, the fixed plate 9 and the pressure plate 11 are pushed down. The pressure plate 11 presses down the hot melt adhesive sheet, and the pressure sensor 12 detects the downward pressure. force, thereby detecting the degree of deformation of the hot-melt adhesive sheet under different pressures, thereby judging the stackable quantity of hot-melt adhesive sheets of different qualities and batches. During the transportation inspection process, the support plate 6 supports the conveyor belt 5 during the inspection process to prevent the conveyor belt 5 from being affected by deformation and affecting the pressure detection effect. The experimental process can be observed by the monitor 7 on one side or by the glass plate on one side. The temperature sensor 14 is fixed to the fixing plate 9 to detect the temperature near the hot-melt adhesive sheet during the downward pressure process to prevent the uneven temperature in the warehouse from affecting the accuracy of the inspection.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A transportation safety experimental device, characterized in that: The invention comprises an L-shaped warehouse plate (1): the L-shaped warehouse plate (1) is an inverted L-shape, the bottom of the top plate of the L-shaped warehouse plate (1) is fixedly connected to a pneumatic telescopic rod (8), the bottom of the pneumatic telescopic rod (8) is fixedly connected to a fixed plate (9), a plurality of fixed blocks (10) are evenly distributed at the outer ring position of the bottom of the fixed plate (9), the bottom of the fixed block (10) is fixedly connected to a pressure plate (11), the bottom of the fixed plate (9) is fixedly connected to a pressure sensor (12), the pressure sensing end of the pressure sensor (12) is in contact with the upper surface of the pressure plate (11), the side plate of the L-shaped warehouse plate (1) perpendicular to the ground is fixedly connected to a transmission warehouse (2), and the interior of the transmission warehouse (2) is provided with The conveying mechanism comprises a side plate inside the conveying bin (2) fixedly connected to a monitor (7), a plug-in slot (13) is provided on the top of the fixed plate (9), a temperature sensor (14) is plugged in and connected to the plug-in slot (13), a heat fan (17) is fixedly connected to the middle of a side plate of the L-shaped bin plate (1) perpendicular to the ground, the heat fan (17) is located above the monitor (7), the conveying bin (2) is located directly below the top plate of the L-shaped bin plate (1), the L-shaped bin plate (1) and the conveying bin (2) are combined into a three-side open experimental bin structure, wherein two opposite side plates are respectively provided with an outer flap 1 (15) and an outer flap 2 (18), and the other side is provided with a transparent glass plate (22).

2. A transportation safety experiment device according to claim 1, characterized in that: The temperature sensors (14) are evenly distributed inside the fixed plate (9), and the sensing ends of the temperature sensors (14) are located above the fixed plate (9).

3. A transportation safety experiment device according to claim 1, characterized in that: The vertical projection area of the top plate of the L-shaped warehouse plate (1) is equal to the floor area of the bottom plate of the L-shaped warehouse plate (1).

4. A transportation safety experiment device according to claim 1, characterized in that: The conveying mechanism comprises a feed plate (3), a discharge plate (4), a conveyor belt (5) and a support plate (6), wherein the feed plate (3) and the discharge plate (4) are located on both sides of the interior of the conveying bin (2), the conveyor belt (5) is located between the feed plate (3) and the discharge plate (4), the conveyor belt (5) is fixed to the interior of the conveying bin (2) for transmission, a support plate (6) is provided inside the conveyor belt (5), the top surface of the support plate (6) is in contact with the bottom of the upper transmission surface of the conveyor belt (5), the upper transmission surface of the conveyor belt (5) is located on the top of the support plate (6) for sliding transmission, and the two ends of the support plate (6) are fixedly connected to the inner walls of both sides of the conveying bin (2).

5. A transportation safety experiment device according to claim 1, characterized in that: The tops of the outer flap 1 (15) and the outer flap 2 (18) are rotatably connected to the two sides of the top plate of the L-shaped warehouse plate (1) through hinges respectively. The top of the outer flap 1 (15) facing the warehouse is fixedly connected with a spring telescopic rod (16). The angle between the spring telescopic rod (16) and the outer flap 1 (15) is 45 degrees. The extended end of the spring telescopic rod (16) contacts the bottom of the top plate of the L-shaped warehouse plate (1).

6. A transportation safety experiment device according to claim 5, characterized in that: An electromagnetic lock (19) is fixedly connected to one side of the second outer flap (18), and the electromagnetic lock (19) acts on the second outer flap (18) and one end of the side plate of the L-shaped warehouse plate (1). The transparent glass plate (22) is thermal insulation glass.

7. A transportation safety experiment device according to claim 4, characterized in that: The transmission motor of the conveyor belt (5) is located on the outer side of the vertical side plate of the L-shaped warehouse plate (1). The outer sleeve of the conveyor belt (5) is provided with a motor box (20). The motor box (20) is a rectangular frame with hollow sides. Fans (21) are fixedly connected to both sides of the motor box (20).

8. A transportation safety experiment device according to claim 6, characterized in that: Both ends of the fixed block (10) are fixedly connected to the fixed plate (9) and the pressing plate (11), respectively.

Citation Information

Patent Citations

  • Transportation quality safety experiment device for hot melt adhesive sheet

    CN209842930U