Device and method for testing tensile effect of wrapping film for machine

Abstract

The invention discloses a tensile effect test device for a machine-used wrapping film in the field of wrapping film testing, the tensile effect test device comprises a bottom plate, supporting columns, a top plate and a fixing plate, the supporting columns are fixedly connected to the edge positions of the four corners of the top of the bottom plate, the top plate is fixedly connected to the tops of the supporting columns, and the fixing plate is fixedly connected to the top of the top plate. The fixing plate is fixedly connected to the middle of the right portion of the top of the bottom plate, a sliding groove is formed in the middle of the left side of the top of the bottom plate in a penetrating mode, and a threaded rod is rotationally connected to the middle between the left side and the right side of the sliding groove in a penetrating mode. The wrapping film is prevented from falling off in the stretching process to affect the test result, meanwhile, the wrapping film can be prevented from being damaged during fixing, the internal structure of the wrapping film is prevented from being damaged by surface punching of the wrapping film, the tensile test result is prevented from being affected, and meanwhile the accuracy of the tensile test result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of stretch film testing, in particular to a stretch resistance effect testing device and a testing method for stretch film for machines. Background Art

[0002] Machine stretch film, also known as stretch film and heat shrink film, is a packaging film that can be used with large-scale wrapping packaging machines to quickly package various goods or pallets as a whole. It is mostly used for the sale and transportation of various products. Its main function is to stabilize, cover and protect the product. After the stretch film is produced, it is necessary to perform a tensile test on the stretch film to ensure the product quality of the stretch film.

[0003] When the current stretch film is subjected to a tensile test, due to its smooth surface, the stretch film is easy to fall off the clamping device, causing the tensile test to fail. At the same time, some devices punch holes in the stretch film to fix it, which can easily cause damage to the stretch film structure, thereby affecting the test results of the stretch film tensile test. For this reason, we proposed a tensile resistance test device and test method for machine stretch film. Summary of the invention

[0004] The purpose of the present invention is to provide a tensile resistance test device and a test method for machine-used stretch film, so as to solve the problem raised in the above background technology that the current stretch film is easy to fall off from the clamping device during the tensile test, resulting in the failure of the tensile test, and at the same time, some devices punch holes to fix the stretch film, which is easy to damage the structure and affect the test results of the tensile test.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a tensile effect test device for machine-used wrapping film, comprising a bottom plate, a supporting column, a top plate and a fixing plate, the supporting column being fixedly connected at the four corner edges of the top of the bottom plate, the top plate being fixedly connected to the top of the supporting column, the fixing plate being fixedly connected to the middle right part of the top of the bottom plate, a sliding groove being penetrated through the middle part of the left side of the top of the bottom plate, a threaded rod being penetrated and rotatably connected through the middle part between the left and right sides of the sliding groove, a limiting rod being fixedly connected to the front and rear parts between the left and right sides of the sliding groove, a driving motor being fixedly connected to the middle part of the left side of the bottom plate, a mounting plate being screwed to the outer wall of the threaded rod by a thread, a tension sensor being fixedly connected to the middle part of the right top of the mounting plate, and a clamping mechanism being fixedly connected to the equal sides of the fixing plate of the tension sensor, the clamping mechanism comprising a mounting frame, a rotating roller, a placement groove, a contraction cavity, a moving groove, a first spring, a connecting block, a tension The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, and the plurality of springs are provided with a plurality of springs.

[0006] As a further description of the above technical solution, the input end of the drive motor is electrically connected to the output end of the external power supply, and the output shaft end of the drive motor is fixedly connected to the left end of the threaded rod, and the mounting plate is slidably connected to the outer wall of the limit rod.

[0007] As a further description of the above technical solution, the connection block is slidably connected to the inside of the shrinkage cavity, and the outer side wall of the connection block is in contact with the inner side wall of the shrinkage cavity.

[0008] As a further description of the above technical solution, the pulling block is located inside the moving groove, and two ends of the second spring are fixedly connected to the pulling plate and the opposite sides of the fixed block respectively.

[0009] As a further description of the above technical solution, a protective mechanism is connected to the top of the top plate, and the protective mechanism includes a through slot, a limit slot, a rack, a limit bar, a dual-axis motor, a transmission gear and a transparent cover. A through slot is opened through the four corners of the top of the top plate, and a limit slot is opened in the middle of the front and rear sides of the through slot. A rack is slidably connected inside the through slot, and the limit bar is fixedly connected to the middle of the front and rear sides of the rack. A dual-axis motor is fixedly connected to the middle of the left and right sides of the top of the top plate, and the output shaft end of the dual-axis motor is fixedly connected to the transmission gear, and the bottom end of the rack is fixedly connected to a transparent cover.

[0010] As a further description of the above technical solution, the limit bar is located inside the limit groove, the output shaft end of the dual-axis motor is electrically connected to the output end of the external power supply, and the outer wall of the transmission gear is meshed with the inner wall of the rack through tooth patterns.

[0011] As a further description of the above technical scheme, a moving mechanism is symmetrically connected to the bottom of the base plate, and the moving mechanism includes an installation box, a third spring, a moving plate, a moving wheel, a pedal, a sliding groove, an installation cavity, a pulling groove, a fourth spring, a card block and a pulling block. The bottom of the base plate is symmetrically fixedly connected to the installation box, the front and rear parts of the inner cavity top of the installation box are fixedly connected to the third spring, the bottom end of the third spring is fixedly connected to the moving plate, the front and rear parts of the bottom of the moving plate are rotatably connected to the moving wheel, the left middle part of the moving plate is fixedly connected to the engine oil pedal, the middle part of the left bottom of the installation box is provided with a sliding groove, the bottom of the front and rear sides of the sliding groove are provided with an installation cavity, the middle part of the left side of the installation cavity is provided with a pulling groove, the middle part of the opposite side of the installation cavity at the front and rear parts is fixedly connected with a fourth spring, the opposite ends of the fourth spring at the front and rear parts are fixedly connected with a card block, and the left side of the card block is fixedly connected with a pulling block.

[0012] As a further description of the above technical solution, the outer wall of the movable plate is fitted with the inner wall of the installation box, the pedal is located inside the sliding groove, the outer wall of the card block is fitted with the inner wall of the installation cavity, and a slope is provided on the top of the card block, and the pulling block is located inside the pull groove.

[0013] A method for testing the tensile strength of a machine-used stretch film comprises the following steps:

[0014] S1. Lift the bottom plate slightly, step on the pedal to drive the moving plate to move, so that the moving wheels are in contact with the ground, move the device to the test site, and then store the moving wheels inside the installation box to stabilize the device;

[0015] S2, pull the pull block to drive the connecting block to move, place one end of the stretch film inside the placement groove, loosen the pull block to make the connecting block press the stretch film tightly, then release the fixation of the turntable, rotate the turntable to drive the rotating roller to rotate, so that the stretch film is wound around the outside of the rotating roller, and then fix the turntable to complete the fixation of the stretch film;

[0016] S3, start the dual-axis motor to drive the transmission gear to rotate, so that the rack descends, and then drives the transparent cover to descend, covering the wrapping film;

[0017] S4, start the drive motor to drive the threaded rod to rotate, use the limit rod to limit the installation plate to move, and then the tension sensor drives the left clamping mechanism to move, so that the wrapping film is stretched, and the tension value is obtained using the tension sensor.

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

[0019] 1. The stretch resistance test device and test method of the stretch film used in the machine are as follows: pull the pulling block to drive the connecting block to move, squeeze the first spring, place one end of the stretch film inside the placement groove, loosen the pulling block, reset the connecting block by resetting the first spring, and make the pressure plate press the stretch film tightly. Then, release the fixation of the turntable, rotate the turntable to drive the rotating roller to rotate, so that the stretch film is wound around the outside of the rotating roller, and then fix the turntable to complete the fixation of the stretch film. After the stretch film is pressed and fixed, it is wound again to improve the fixing effect of the stretch film, avoid the stretch film from falling off during the stretching process to affect the test results, and avoid damage to the stretch film during fixation, prevent the surface of the stretch film from being punched to damage the internal structure of the stretch film, avoid affecting the results of the tensile test, and improve the accuracy of the tensile test results.

[0020] 2. The stretch film tensile test device and test method for the machine start the double-axis motor to drive the transmission gear to rotate, and the transmission gear is meshed with the rack. When the transmission gear rotates, the rack descends, and then drives the transparent cover to descend, covering the stretch film, thereby protecting the stretch film from breaking, avoiding the broken debris from affecting the test personnel, ensuring the safety of the test, and improving the protection of the device.

[0021] 3. The tensile strength test device and test method of the stretch film used in the machine are as follows: lightly lift the bottom plate, step on the pedal, drive the movable plate to move, stretch the third spring, and lower the movable wheel at the same time; when the pedal squeezes the inclined surface of the block, the block contracts and squeezes the fourth spring; when the pedal is at the bottom of the block, the block is reset by resetting the fourth spring, the pedal is limited, and the movable wheel is positioned, so as to facilitate the transportation of the device, make the transportation of the device more time-saving and labor-saving, avoid the use of professional tools, and improve the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the threaded rod installation structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the protection mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the through slot of the present invention;

[0027] Figure 6 It is a schematic diagram of the third spring installation structure of the present invention;

[0028] Figure 7 A schematic diagram of the structure of the installation cavity of the present invention;

[0029] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of part A.

[0030] In the figure: 100, bottom plate; 110, slide groove; 120, threaded rod; 130, limit rod; 140, drive motor; 150, mounting plate; 160, tension sensor; 200, support column; 300, top plate; 400, fixed plate; 500, clamping mechanism; 510, mounting frame; 520, rotating roller; 530, placement groove; 540, contraction cavity; 541, moving groove; 550, first spring; 560, connecting block; 561, pulling block; 570, pressing plate; 580, turntable; 581, jack; 590, fixed block ; 591, plug rod; 592, pull plate; 593, second spring; 600, protective mechanism; 610, through groove; 620, limit groove; 630, rack; 640, limit bar; 650, dual-axis motor; 660, transmission gear; 670, transparent cover; 700, moving mechanism; 710, installation box; 720, third spring; 730, moving plate; 740, moving wheel; 750, pedal; 760, sliding groove; 770, installation cavity; 771, pull groove; 780, fourth spring; 790, block; 791, pulling block. DETAILED DESCRIPTION

[0031] 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.

[0032] Embodiment 1:

[0033] See also Figure 1 , Figure 2 and Figure 3A tensile test device for a machine-used wrapping film comprises a bottom plate 100, a support column 200, a top plate 300 and a fixing plate 400. The support column 200 is fixedly connected to the four corners of the top of the bottom plate 100, the top plate 300 is fixedly connected to the top of the support column 200, the fixing plate 400 is fixedly connected to the middle right part of the top of the bottom plate 100, a slide groove 110 is provided through the middle part of the left side of the top of the bottom plate 100, a threaded rod 120 is rotatably connected through the middle part between the left and right sides of the slide groove 110, a limiting rod 130 is fixedly connected to the front and rear parts between the left and right sides of the slide groove 110, a driving motor 140 is fixedly connected to the middle part of the left side of the bottom plate 100, a mounting plate 150 is screwed to the outer wall of the threaded rod 120 through a thread, and the mounting plate 1 A tension sensor 160 is fixedly connected to the middle of the top right side of 50, and a clamping mechanism 500 is fixedly connected to the equal sides of the fixed plate 400 of the tension sensor 160. The clamping mechanism 500 includes a mounting frame 510, a rotating roller 520, a placement groove 530, a contraction cavity 540, a movable groove 541, a first spring 550, a connecting block 560, a pulling block 561, a pressing plate 570, a rotating disk 580, a jack 581, a fixing block 590, a plug rod 591, a pulling plate 592 and a second spring 593. The right side of the tension sensor 160 and the left side of the fixed plate 400 are fixedly connected to the mounting frame 510, and a rotating roller 520 is rotatably connected between the front and rear sides of the interior of the mounting frame 510, and a placement groove 530 is provided on the outer wall of the rotating roller 520. A contraction cavity 540 is provided in the middle of the top of the mounting groove 530, and a moving groove 541 is provided through the middle of the front and rear sides of the contraction cavity 540, and a first spring 550 is evenly fixedly connected to the top of the contraction cavity 540, and a connecting block 560 is fixedly connected to the bottom end of the first spring 550, and a pressing plate 570 is fixedly connected to the bottom of the connecting block 560, and a pulling block 561 is fixedly connected to the middle of the top of the front and rear sides of the connecting block 560, and a rotating disk 580 is fixedly connected to the front end of the transmission shaft of the rotating roller 520, and a plug hole 581 is evenly provided on the outer wall of the rotating disk 580, and a fixed block 590 is fixedly connected to the middle of the front left side of the mounting frame 510, and a plug rod 591 is slidably connected to the middle of the left side of the fixed block 590, and a pulling plate 592 is fixedly connected to the left end of the plug rod 591, The outer side of the rod 591 is sleeved with a second spring 593, the input end of the driving motor 140 is electrically connected to the output end of the external power supply, and the output shaft end of the driving motor 140 is fixedly connected to the left end of the threaded rod 120, the mounting plate 150 is slidably connected to the outer wall of the limiting rod 130, the connecting block 560 is slidably connected to the inside of the contraction cavity 540, and the outer wall of the connecting block 560 is in contact with the inner wall of the contraction cavity 540, the pulling block 561 is located inside the movable groove 541, and the two ends of the second spring 593 are fixedly connected to the opposite sides of the pulling plate 592 and the fixed block 590, respectively. Pulling the pulling block 561 drives the connecting block 560 to move, squeezes the first spring 550, places one end of the wrapping film inside the placement groove 530, and loosens the pulling block 561.The first spring 550 is reset to reset the connection block 560, so that the pressure plate 570 presses the wrapping film, and then the fixation of the turntable 580 is released. The turntable 580 is rotated to drive the rotating roller 520 to rotate, so that the wrapping film is wound around the outer side of the rotating roller 520, and then the turntable 580 is fixed to complete the fixation of the wrapping film. After the wrapping film is pressed and fixed, it is wound to improve the fixing effect of the wrapping film, avoid the wrapping film from falling off during the stretching process and affecting the test results, and at the same time avoid damage to the wrapping film during fixation, prevent the surface of the wrapping film from being punched to damage the internal structure of the wrapping film, avoid affecting the results of the tensile test, and at the same time improve the accuracy of the tensile test results.

[0034] Embodiment 2:

[0035] See also Figure 1 , Figure 2 , Figure 4 and Figure 5A tensile test device for a machine-used wrap film comprises a bottom plate 100, a support column 200, a top plate 300 and a fixed plate 400. The support column 200 is fixedly connected to the four corners of the top of the bottom plate 100, the top plate 300 is fixedly connected to the top of the support column 200, the fixed plate 400 is fixedly connected to the middle right part of the top of the bottom plate 100, a slide groove 110 is provided through the middle of the left side of the top of the bottom plate 100, a threaded rod 120 is rotatably connected to the middle between the left and right sides of the slide groove 110, and the front and rear parts between the left and right sides of the slide groove 110 are fixedly connected. The limit rod 130 is connected, the driving motor 140 is fixedly connected to the middle of the left side of the bottom plate 100, the outer wall of the threaded rod 120 is screwed with a mounting plate 150 through a thread, the middle of the right top of the mounting plate 150 is fixedly connected to a tension sensor 160, the equal sides of the fixing plate 400 of the tension sensor 160 are fixedly connected to the clamping mechanism 500, the top of the top plate 300 is connected to the protective mechanism 600, and the protective mechanism 600 includes a through slot 610, a limit slot 620, a rack 630, a limit bar 640, a dual-axis motor 650, a transmission gear 660 and a transparent A through slot 610 is provided at the four corners of the top of the top plate 300, and a limiting slot 620 is provided in the middle of the front and rear sides of the through slot 610. A rack 630 is slidably connected inside the through slot 610, and a limiting strip 640 is fixedly connected to the middle of the front and rear sides of the rack 630. A dual-axis motor 650 is fixedly connected to the middle of the left and right sides of the top of the top plate 300, and a transmission gear 660 is fixedly connected to the output shaft end of the dual-axis motor 650. A transparent cover 670 is fixedly connected to the bottom end of the rack 630. The limiting strip 640 is located inside the limiting slot 620. The output shaft end of 650 is electrically connected to the output end of the external power supply, and the outer wall of the transmission gear 660 is meshed with the inner wall of the rack 630 through the tooth pattern. By starting the dual-axis motor 650, the transmission gear 660 is driven to rotate, and the transmission gear 660 is meshed and connected with the rack 630. When the transmission gear 660 rotates, the rack 630 is lowered, and then the transparent cover 670 is driven to lower, and the wrapping film is covered and shielded, so as to protect the wrapping film from breaking, avoid the broken debris from affecting the test personnel, ensure the safety of the test, and improve the protection of the device. Embodiment 3;

[0036] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8A tensile test device for a machine-used wrap film comprises a bottom plate 100, a support column 200, a top plate 300 and a fixed plate 400. The support column 200 is fixedly connected to the four corners of the top of the bottom plate 100, the top plate 300 is fixedly connected to the top of the support column 200, the fixed plate 400 is fixedly connected to the middle right part of the top of the bottom plate 100, a slide groove 110 is provided through the middle of the left side of the top of the bottom plate 100, a threaded rod 120 is rotatably connected through the middle between the left and right sides of the slide groove 110, a limit rod 130 is fixedly connected to the front and rear between the left and right sides of the slide groove 110, a driving motor 140 is fixedly connected to the middle of the left side of the bottom plate 100, and a mounting plate 15 is screwed to the outer wall of the threaded rod 120 through a thread. 0, a tension sensor 160 is fixedly connected to the middle of the top right side of the mounting plate 150, and the equal sides of the fixing plate 400 of the tension sensor 160 are fixedly connected with the clamping mechanism 500, and the bottom of the base plate 100 is symmetrically connected with the moving mechanism 700, and the moving mechanism 700 includes a mounting box 710, a third spring 720, a moving plate 730, a moving wheel 740, a pedal 750, a sliding groove 760, a mounting cavity 770, a pull groove 771, a fourth spring 780, a block 790 and a pulling block 791, and the bottom of the base plate 100 is symmetrically fixedly connected with the mounting box 710, and the front and rear parts of the inner cavity top of the mounting box 710 are fixedly connected, and the bottom end of the third spring 720 is fixedly connected with the moving plate 730, and the moving plate The front and rear parts of the bottom of 730 are rotatably connected with a moving wheel 740, the middle part of the left side of the moving plate 730 is fixedly connected with an oil pedal 750, a sliding groove 760 is provided in the middle part of the left bottom of the installation box 710, and an installation cavity 770 is provided at the bottom of the front and rear sides of the sliding groove 760. A pulling groove 771 is provided in the middle part of the left side of the installation cavity 770, and a fourth spring 780 is fixedly connected to the middle part of the opposite side of the installation cavity 770 of the front and rear parts, and a card block 790 is fixedly connected to the opposite end of the fourth spring 780 of the front and rear parts, and a pulling block 791 is fixedly connected to the left side of the card block 790, the outer wall of the moving plate 730 is in contact with the inner wall of the installation box 710, the pedal 750 is located inside the sliding groove 760, and the outer wall of the card block 790 is connected to the installation The inner wall of the cavity 770 is fitted, and the top of the block 790 is provided with an inclined surface. The pulling block 791 is located inside the pulling groove 771. The bottom plate 100 is lightly lifted, and the pedal 750 is stepped on to drive the movable plate 730 to move, so that the third spring 720 is stretched and the movable wheel 740 is lowered. When the pedal 750 squeezes the inclined surface of the block 790, the block 790 contracts and squeezes the fourth spring 780. When the pedal 750 is located at the bottom of the block 790, the block 790 is reset by resetting the fourth spring 780, and the pedal 750 is limited to position the movable wheel 740, thereby facilitating the transportation of the device, making the transportation of the device more time-saving and labor-saving, avoiding the use of professional tools, and improving the practicality of the device.

[0037] Embodiment 4:

[0038] See also Figure 1-8 This embodiment provides a method for testing the tensile strength of a machine-used stretch film, comprising the following steps:

[0039] S1, gently lift the bottom plate 100, step on the pedal 750 to drive the moving plate 730 to move, so that the moving wheel 740 contacts the ground, move the device to the test site, and then store the moving wheel 740 inside the installation box 710 to stabilize the device;

[0040] S2, pull the pull block 561 to drive the connecting block 560 to move, place one end of the wrapping film inside the placement groove 530, loosen the pull block 561, make the connecting block 560 press the wrapping film tightly, then release the fixation of the turntable 580, rotate the turntable 580 to drive the rotating roller 520 to rotate, so that the wrapping film is wound around the outer side of the rotating roller 520, and then fix the turntable 580 to complete the fixation of the wrapping film;

[0041] S3, starting the dual-axis motor 650 to drive the transmission gear 660 to rotate, so that the rack 630 is lowered, and then the transparent cover 670 is driven to lower, so as to cover and shield the wrapping film;

[0042] S4, start the driving motor 140 to drive the threaded rod 120 to rotate, and use the limitation of the limit rod 130 to move the mounting plate 150, so that the tension sensor 160 drives the left clamping mechanism 500 to move, so that the wrapping film is stretched, and the tension value is obtained by the tension sensor 160.

[0043] In specific use, during the test, the technical personnel in this field lightly lift the bottom plate 100 and step on the pedal 750 to drive the moving plate 730 to move, so that the third spring 720 is stretched and the moving wheel 740 is lowered. When the pedal 750 presses the inclined surface of the block 790, the block 790 contracts and the fourth spring 780 is pressed. When the pedal 750 is located at the bottom of the block 790, the block 790 is reset by resetting the fourth spring 780, and the pedal 750 is limited to position the moving wheel 740. The device is transported to the test site, and then the pulling block 791 is pulled to shrink the card block 790, release the fixation of the pedal 750, and the third spring 720 is reset to make the moving plate 730 drive the moving wheel 740 to reset. Then, the pulling block 561 is pulled to drive the connecting block 560 to move, and the first spring 550 is squeezed to place one end of the wrapping film inside the placement groove 530. The pulling block 561 is loosened, and the connecting block 560 is reset by the reset of the first spring 550, so that the pressing plate 570 presses the wrapping film. The pull plate 592 is pulled to move the insertion rod 591 out of the insertion hole 581, and the second spring 593 is stretched to release the fixation of the turntable 580. The turntable 580 drives the rotating roller 520 to rotate, so that the wrapping film is wrapped around the outer side of the rotating roller 520. Then, the insertion hole 581 is aligned with the insertion rod 591, and the pull plate 592 is loosened. The second spring 593 is reset to make the insertion rod 591 embedded in the insertion hole 581, and the turntable 580 is fixed to complete the fixation of the wrapping film. After the wrapping film is fixed, the dual-axis motor 65 is started. 0, drives the transmission gear 660 to rotate, and the transmission gear 660 is meshed with the rack 630. When the transmission gear 660 rotates, the rack 630 descends, thereby driving the transparent cover 670 to descend, covering and shielding the wrapping film. Then, the drive motor 140 is started to drive the threaded rod 120 to rotate, and the mounting plate 150 is moved by utilizing the restriction of the limit rod 130, thereby enabling the tension sensor 160 to drive the left clamping mechanism 500 to move, thereby stretching the wrapping film, and utilizing the tension sensor 160 to obtain the tension value.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tensile strength test device for machine-used stretch film, characterized in that: The invention comprises a bottom plate (100), a support column (200), a top plate (300) and a fixed plate (400), wherein the support column (200) is fixedly connected to the four corners of the top of the bottom plate (100), the top plate (300) is fixedly connected to the top of the support column (200), the fixed plate (400) is fixedly connected to the middle right part of the top of the bottom plate (100), a slide groove (110) is provided through the middle left part of the top of the bottom plate (100), a threaded rod (120) is rotatably connected through the middle part between the left and right sides of the slide groove (110), a limit rod (130) is fixedly connected to the front and rear parts between the left and right sides of the slide groove (110), and the bottom plate (100) A driving motor (140) is fixedly connected to the middle of the left side of the threaded rod (120); a mounting plate (150) is screwed to the outer wall of the threaded rod (120) through a thread; a tension sensor (160) is fixedly connected to the middle of the right top of the mounting plate (150); equal sides of the fixing plate (400) of the tension sensor (160) are fixedly connected to a clamping mechanism (500), and the clamping mechanism (500) includes a mounting frame (510), a rotating roller (520), a placement groove (530), a contraction cavity (540), a moving groove (541), a first spring (550), a connecting block (560), a pulling block (561), a pressing plate (570), a rotating disk (580), a jack (581), a fixing block (590), an insert rod (591), a pull plate (592) and a second spring (593), the right side of the tension sensor (160) and the left side of the fixed plate (400) are fixedly connected with a mounting frame (510), a rotating roller (520) is rotatably connected between the front and rear sides of the mounting frame (510), a placement groove (530) is provided on the outer wall of the rotating roller (520), a contraction cavity (540) is provided in the middle of the top of the placement groove (530), a moving groove (541) is provided in the middle of the front and rear sides of the contraction cavity (540), the top of the contraction cavity (540) is evenly fixedly connected with a first spring (550), the bottom end of the first spring (550) is fixedly connected to the A connecting block (560) is fixedly connected, a pressure plate (570) is fixedly connected to the bottom of the connecting block (560), a pulling block (561) is fixedly connected to the middle of the top of the front and rear sides of the connecting block (560), a turntable (580) is fixedly connected to the front end of the transmission shaft of the rotating roller (520), and the outer wall of the turntable (580) is evenly provided with insertion holes (581), a fixed block (590) is fixedly connected to the middle of the front left part of the mounting frame (510), an insertion rod (591) is slidably connected to the middle of the left side of the fixed block (590), a pulling plate (592) is fixedly connected to the left end of the insertion rod (591), and a second spring (593) is sleeved on the outer side of the insertion rod (591).

2. The tensile strength test device for a machine-used stretch film according to claim 1, characterized in that: The input end of the drive motor (140) is electrically connected to the output end of the external power supply, and the output shaft end of the drive motor (140) is fixedly connected to the left end of the threaded rod (120), and the mounting plate (150) is slidably connected to the outer side wall of the limiting rod (130).

3. The tensile strength test device for a machine-used stretch film according to claim 1, characterized in that: The connection block (560) is slidably connected to the interior of the shrinkage cavity (540), and the outer wall of the connection block (560) is in contact with the inner wall of the shrinkage cavity (540).

4. The tensile strength test device for a machine-used stretch film according to claim 1, characterized in that: The pulling block (561) is located inside the moving groove (541), and the two ends of the second spring (593) are fixedly connected to the pulling plate (592) and the opposite sides of the fixing block (590) respectively.

5. The tensile strength test device for a machine-used stretch film according to claim 1, characterized in that: The top of the top plate (300) is connected to a protection mechanism (600), the protection mechanism (600) comprising a through slot (610), a limiting slot (620), a rack (630), a limiting bar (640), a dual-axis motor (650), a transmission gear (660) and a transparent cover (670), through slots (610) are provided at the four corners of the top of the top plate (300), and a limiting slot (620) is provided in the middle of the front and rear sides of the through slot (610). A positioning groove (620) is provided, a rack (630) is slidably connected inside the through groove (610), a limiting strip (640) is fixedly connected to the middle of the front and rear sides of the rack (630), a dual-axis motor (650) is fixedly connected to the middle of the left and right sides of the top of the top plate (300), a transmission gear (660) is fixedly connected to the end of the output shaft of the dual-axis motor (650), and a transparent cover (670) is fixedly connected to the bottom end of the rack (630).

6. The tensile strength test device for a machine-used stretch film according to claim 5, characterized in that: The limit bar (640) is located inside the limit groove (620), the output shaft end of the dual-axis motor (650) is electrically connected to the output end of the external power supply, and the outer wall of the transmission gear (660) is meshed with the inner wall of the rack (630) through tooth patterns.

7. The tensile strength test device for a machine-used stretch film according to claim 1, characterized in that: The bottom of the base plate (100) is symmetrically connected to a moving mechanism (700), and the moving mechanism (700) includes a mounting box (710), a third spring (720), a moving plate (730), a moving wheel (740), a pedal (750), a sliding groove (760), a mounting cavity (770), a pull groove (771), a fourth spring (780), a clamping block (790) and a pulling block (791). The bottom of the base plate (100) is symmetrically fixedly connected to the mounting box (710), the front and rear parts of the inner cavity top of the mounting box (710) are fixedly connected to the third spring (720), the bottom end of the third spring (720) is fixedly connected to the moving plate (730), and the moving plate (7 The front and rear parts of the bottom of the movable plate (730) are rotatably connected with a moving wheel (740), the left middle part of the movable plate (730) is fixedly connected with an oil pedal (750), a sliding groove (760) is provided through the middle part of the left bottom of the installation box (710), the bottom of the front and rear sides of the sliding groove (760) are provided with an installation cavity (770), the left middle part of the installation cavity (770) is provided with a pulling groove (771), the middle part of the opposite side of the installation cavity (770) of the front and rear parts is fixedly connected with a fourth spring (780), the opposite ends of the fourth spring (780) of the front and rear parts are fixedly connected with a clamping block (790), and the left side of the clamping block (790) is fixedly connected with a pulling block (791).

8. The tensile strength test device for a machine-used stretch film according to claim 7, characterized in that: The outer wall of the movable plate (730) is in contact with the inner wall of the installation box (710), the pedal (750) is located inside the sliding groove (760), the outer wall of the clamping block (790) is in contact with the inner wall of the installation cavity (770), and a slope is provided on the top of the clamping block (790), and the pulling block (791) is located inside the pulling groove (771).

9. A method for testing the tensile strength of a machine-used stretch film according to any one of claims 1 to 8, comprising the following steps: S1, lightly lift the bottom plate (100), step on the pedal (750) to drive the moving plate (730) to move, so that the moving wheels (740) are in contact with the ground, and the device is moved to the test site, and then the moving wheels (740) are stored in the installation box (710) to stabilize the device; S2, pull the pulling block (561) to drive the connecting block (560) to move, place one end of the wrapping film inside the placement groove (530), loosen the pulling block (561) to make the connecting block (560) press the wrapping film tightly, then release the fixation of the rotating disk (580), rotate the rotating disk (580) to drive the rotating roller (520) to rotate, so that the wrapping film is wound around the outer side of the rotating roller (520), and then fix the rotating disk (580) to complete the fixation of the wrapping film; S3, starting the dual-axis motor (650) to drive the transmission gear (660) to rotate, thereby causing the rack (630) to descend, and then driving the transparent cover (670) to descend, so as to cover and shield the wrapping film; S4, start the driving motor (140) to drive the threaded rod (120) to rotate, and use the limitation of the limit rod (130) to move the mounting plate (150), so that the tension sensor (160) drives the left clamping mechanism (500) to move, so that the wrapping film is stretched, and the tension value is obtained using the tension sensor (160).

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