A packaging bag tensile strength testing device

Abstract

The present invention belongs to the technical field of material tensile testing, and discloses a packaging bag tensile performance testing device, including a housing and a driving mechanism, and also includes: a clamping assembly, including a second gear, a plurality of first gears, a first disc, a clamping plate and a first round rod; a stretching mechanism, including a friction assembly and a circular ring fixedly mounted on the first disc, a screw rod is threadedly connected to the inner wall of the circular ring, and the thread spacing between different screw rods is different, a support plate is installed on the lower end face of the screw rod, a spring telescopic rod is symmetrically installed on the upper end face of the support plate, and the upper end face of the spring telescopic rod is installed on the housing; a friction assembly, including an extrusion assembly and a fixed frame, a plurality of third sliding grooves are symmetrically opened on the outer wall of the fixed frame, a first slider is slidably installed on the inner wall of the third sliding groove, and a friction rod is fixedly installed on the side of the first slider away from the fixed frame. The present invention solves the problem that the existing device cannot test the tensile performance at different tensile rates and cannot test the influence of friction on the tensile performance.

Description

Technical Field

[0001] The invention relates to the technical field of material tensile testing, in particular to a packaging bag tensile performance testing device. Background Art

[0002] Packaging bags usually need to have a certain degree of waterproofness and durability, while maintaining protection and hygiene standards for the items inside. Therefore, they are often composite materials, usually including the following structures: double-layer structure: This structure consists of a layer of paper and a layer of plastic film; all-plastic structure: mainly composed of plastic films such as polyethylene (PE) or polypropylene (PP). The main function of the packaging bag is to ensure that the items inside will not be contaminated. In order to prevent contamination caused by damage to the packaging bag, the packaging bag must be subjected to tensile resistance testing.

[0003] The Chinese patent discloses an "automatic tensile testing device for medical packaging bags" with application number 202211002956.6, which includes a test body, a conveyor belt is installed on the inner side of the test body, packaging bags are placed on the upper side of the conveyor belt, a recovery bucket is installed on the inner side of the test body, a warning light is installed on the upper end of the test body, a central control screen is installed on the front side of the test body, a proximity photoelectric is installed on the right side of the test body, a fixed plate is installed on the inner side of the test body, an electric control box is installed on the upper end of the fixed plate, transmission components are provided on both sides of the lower end of the fixed plate, a grabbing component is provided on the lower side of the fixed plate, a fixed slide is installed at the lower end of the front transmission component, and a tension slide is installed at the lower end of the rear transmission component, and finger cylinders are provided on the lower sides of the fixed slide and the tension slide.

[0004] Although the device can test packaging bags, it cannot test the tensile properties at different stretching rates, and thus cannot fully evaluate the tensile properties of packaging bags, nor can it help determine the performance of materials under normal use or accidental conditions. In addition, packaging bags often come into contact with and rub against other objects during handling, transportation or use. The device cannot detect whether the tensile properties of packaging bags are affected by friction, so it is impossible to more fully evaluate their performance in actual applications. Summary of the invention

[0005] The purpose of the present invention is to provide a packaging bag tensile performance testing device, which solves the problem that the existing device cannot test the tensile performance at different stretching rates and cannot test the influence of friction on the tensile performance.

[0006] To achieve the above object, the present invention provides the following technical solution: a packaging bag tensile performance testing device, comprising a housing, and a driving mechanism located inside the housing, and further comprising:

[0007] The clamping assembly includes a second gear, the outer wall of the second gear is uniformly meshed with a plurality of first gears along its circumference, the outer wall of the first gear is symmetrically provided with a second slide groove, the upper end surface of the first gear abuts against a first disc, the outer wall of the first disc is provided with a first slide groove, the upper end surface of the first disc abuts against a clamping plate symmetrically, the lower end surface of the clamping plate is installed with a first round rod, and the lower end surface of the first round rod is slidably installed on the inner walls of the first and second slide grooves;

[0008] The stretching mechanism comprises a friction component and a circular ring fixedly mounted on a first circular disk, wherein the inner wall of the circular ring is threadedly connected with a screw rod, and the thread pitches between different screw rods are different, a support plate is mounted on the lower end surface of the screw rod, a spring telescopic rod is symmetrically mounted on the upper end surface of the support plate, and the upper end surface of the spring telescopic rod is mounted on the outer shell; when the clamping plate clamps the packaging bag, the first gear drives the first circular disk to rotate through the first circular rod, and the first circular disk drives the circular ring to rotate, and since the circular ring is threadedly connected with the screw rod, the screw rod moves upward, drives the support disk to move, stretches the packaging bag, and compresses the spring telescopic rod, and at this time, the friction component rubs the packaging bag;

[0009] The friction component includes an extrusion component and a fixed frame. The outer wall of the fixed frame is symmetrically provided with a plurality of third sliding grooves. The inner wall of the third sliding groove is slidably provided with a first sliding block. A friction rod is fixedly provided on the side of the first sliding block away from the fixed frame. The extrusion component enables the friction rod to always abut against the outer wall of the packaging bag.

[0010] Preferably, the driving mechanism comprises a servo motor, the servo motor is fixedly mounted on the bottom wall of the housing, and the output shaft of the servo motor passes through the housing and is mounted on the second gear.

[0011] Preferably, a fixing block is rotatably mounted on the outer wall of the annular ring.

[0012] Preferably, a second round rod is installed on the side of the screw rod away from the support plate, and a support plate is rotatably installed on the upper end surface of the second round rod.

[0013] Preferably, a third round rod is rotatably mounted at the center of the fixed frame, and the lower end surface of the third round rod is fixedly connected to the second gear.

[0014] Preferably, a fourth round rod is rotatably mounted between the first sliding blocks.

[0015] Preferably, the extrusion assembly includes a second disc, a plurality of fourth slide grooves are evenly opened on the outer wall of the second disc along its circumference, a second slider is slidably installed on the inner wall of the fourth slide groove, and the center position of the second disc is fixedly connected to the third round rod.

[0016] Preferably, a plurality of support rods are evenly mounted on the lower end surface of the fixing frame along its circumference, and the lower end surfaces of the support rods are mounted on the outer shell.

[0017] Preferably, a control panel is installed on the outer wall of the shell.

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

[0019] 1. The present invention is provided with a plurality of screw rods, and the screw rod thread distances are different. When the ring rotates, the screw rods extend upward at different speeds. The screw rods drive the support plate to stretch the packaging bag through the second round rod, and the tensile performance of the packaging bag at different speeds can be tested;

[0020] 2. The present invention is provided with a friction component. When the packaging bag is stretched, the splint and the fixed block will drive the packaging bag to rotate. At this time, due to the centrifugal force, the second disc will cause the second slider to slide in the fourth slide groove on its outer wall, so that the second disc remains intact. The outer wall of the second disc will always abut against the fourth round rod. The fourth round rod drives the first slider to make the friction rod always abut against the stretched packaging bag and rub it, so as to detect the tensile performance test of the packaging bag under friction conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the present invention without the outer shell;

[0023] Figure 3 It is a schematic diagram of the clamping assembly of the present invention;

[0024] Figure 4 for Figure 3 Explosion diagram;

[0025] Figure 5 It is a schematic diagram of the friction assembly of the present invention;

[0026] Figure 6 for Figure 5 Remove the fixed frame diagram.

[0027] In the figure: 1, housing; 2, control panel; 3, servo motor; 101, clamping plate; 102, first disc; 103, first gear; 104, ring; 105, first slide; 106, first round rod; 107, second slide; 201, support plate; 202, spring telescopic rod; 203, second round rod; 204, support disc; 205, fixed block; 206, screw rod; 301, fixed frame; 302, first slider; 303, third slide; 304, friction rod; 305, second disc; 306, second gear; 307, support rod; 308, fourth slide; 309, third round rod; 310, fourth round rod; 311, second slider. DETAILED DESCRIPTION

[0028] See also Figures 1 to 6 The present invention provides a technical solution: a packaging bag tensile performance testing device, comprising a housing 1, and a driving mechanism located inside the housing 1, and further comprising:

[0029] The clamping assembly includes a second gear 306, the outer wall of the second gear 306 is uniformly meshed with a plurality of first gears 103 along its circumference, the outer wall of the first gear 103 is symmetrically provided with a second slide groove 107, the upper end surface of the first gear 103 abuts against a first disc 102, the outer wall of the first disc 102 is provided with a first slide groove 105, the upper end surface of the first disc 102 abuts against a clamping plate 101 symmetrically, the lower end surface of the clamping plate 101 is installed with a first round rod 106, and the lower end surface of the first round rod 106 is slidably installed on the inner walls of the first slide groove 105 and the second slide groove 107;

[0030] The stretching mechanism comprises a friction component and a ring 104 fixedly mounted on the first disc 102, wherein the inner wall of the ring 104 is threadedly connected with a screw 206, and the thread pitches between different screws 206 are different, a support plate 201 is mounted on the lower end surface of the screw 206, and a spring telescopic rod 202 is symmetrically mounted on the upper end surface of the support plate 201, and the upper end surface of the spring telescopic rod 202 is mounted on the housing 1; when the clamping plate 101 clamps the packaging bag, the first gear 103 drives the first disc 102 to rotate through the first round rod 106, and the first disc 102 drives the ring 104 to rotate, and since the ring 104 is threadedly connected with the screw 206, the screw 206 moves upward, drives the support disc 204 to move, stretches the packaging bag, and compresses the spring telescopic rod 202, and at this time, the friction component rubs the packaging bag;

[0031] The friction component includes an extrusion component and a fixed frame 301. The outer wall of the fixed frame 301 is symmetrically provided with a plurality of third sliding grooves 303. The inner wall of the third sliding groove 303 is slidably installed with a first slider 302. A friction rod 304 is fixedly installed on the side of the first slider 302 away from the fixed frame 301. The extrusion component makes the friction rod 304 always abut against the outer wall of the packaging bag.

[0032] Further, such as Figure 2 As shown, the driving mechanism includes a servo motor 3, which is fixedly mounted on the bottom wall of the housing 1, and the output shaft of the servo motor 3 passes through the housing 1 and is mounted on the second gear 306; the servo motor 3 is used to drive the second gear 306 to rotate;

[0033] Further, such as Figure 3 As shown, a fixing block 205 is rotatably mounted on the outer wall of the ring 104; the fixing block 205 and the clamping plate 101 clamp and seal the bag opening of the packaging bag to prevent air leakage;

[0034] Further, such as Figure 4As shown, a second round rod 203 is installed on the side of the screw rod 206 away from the support plate 201, and a support plate 204 is rotatably installed on the upper end surface of the second round rod 203; when the screw rod 206 drives the second round rod 203 to rise or fall, the second round rod 203 drives the support plate 204 to rise or fall, thereby completing the tensile test of the packaging bag;

[0035] Further, such as Figure 5 As shown, a third round rod 309 is rotatably mounted at the center of the fixed frame 301, and the lower end surface of the third round rod 309 is fixedly connected to the second gear 306; the second gear 306 drives the third round rod 309 to rotate in the fixed frame 301;

[0036] Further, such as Figure 6 As shown, a fourth round rod 310 is rotatably mounted between the first sliders 302; when the first slider 302 moves, the fourth round rod 310 is driven to move;

[0037] Further, such as Figure 6 As shown, the extrusion assembly includes a second disc 305, and a plurality of fourth slide grooves 308 are evenly opened on the outer wall of the second disc 305 along its circumference. A second slider 311 is slidably installed on the inner wall of the fourth slide groove 308. The center position of the second disc 305 is fixedly connected to the third round rod 309. When the third round rod 309 drives the second disc 305 to rotate, the second slider 311 slides in the fourth slide groove 308 due to the centrifugal force, so that the second disc 305 remains intact and abuts against the fourth round rod 310.

[0038] Further, such as Figure 6 As shown, a plurality of support rods 307 are evenly installed along the circumference of the lower end surface of the fixing frame 301, and the lower end surfaces of the support rods 307 are installed on the housing 1;

[0039] Further, such as Figure 1 As shown, a control panel 2 is installed on the outer wall of the housing 1; the control panel 2 sets relevant parameters;

[0040] Furthermore, an air pressure sensor (not shown in the figure) is installed on the inner wall of the second round rod 203; when the gas in the packaging bag remains unchanged, the volume of the packaging bag increases and the internal pressure decreases. When the packaging bag leaks, external gas enters the packaging bag and the air pressure in the packaging bag increases. The air pressure sensor can monitor and promptly detect damage caused by stretching.

[0041] Working principle: Step 1: First, connect the external power supply, then press the friction rod 304, the friction rod 304 drives the first slider 302 to slide in the third slide groove 303 to the side away from the support plate 204, the first slider 302 drives the fourth round rod 310 to squeeze the second slider 311, and the second slider 311 slides in the fourth slide groove 308. At this time, the friction rod 304 is away from the support plate 204, which is convenient for the packaging bag to be set above the support plate 204 and make the bag opening outside the fixed block 205, and then control the servo motor 3 to rotate through the control panel 2, the servo motor 3 drives the second gear 306 to rotate, the second gear 306 drives the first gear 103 to rotate, the first gear 103 drives the second slide groove 107 to rotate, the second slide groove 107 drives the first round rod 106 to slide in the first slide groove 105, the first round rod 106 will drive the splint 101 to squeeze the bag opening of the packaging bag, so that it fits on the outer wall of the fixed block 205, so that the packaging bag is closed. After the bagging mouth is closed, the first gear 103 continues to rotate. At this time, the second slide 107 drives the first disc 102 to rotate through the first round rod 106 and the first slide 105. The first disc 102 drives the ring 104 and the clamping plate 101 to rotate. The clamping plate 101 drives the fixed block 205 to rotate, and the fixed block 205 drives the packaging bag to rotate. At this time, the ring 104 rotates on the outer wall of the screw rod 206. Since the support plate 201 is installed on the lower end surface of the screw rod 206, and the spring telescopic rod 202 is installed on the upper end surface of the support plate 201, the screw rod 206 will not rotate with the ring 104. The screw rod 206 will move upward and drive the support plate 204 to move upward through the second round rod 203. The support plate 204 stretches the packaging bag. At this time, since the screw rod 206 extends longer and longer, the spring telescopic rod 202 is subjected to greater and greater pressure. At this time, the pressure of the clamping plate 101 on the fixed block 205 at the bag mouth of the packaging bag increases to prevent the packaging bag from falling off and leaking.

[0042] When the ring 104 rotates on the outer wall of the screw rod 206, since the thread pitches of different screw rods 206 are different, the screw rods 206 extend at different speeds. When the support plate 204 stretches the packaging bag, the stretching performance of the packaging bag at different speeds can be tested;

[0043] Step 2: Before the servo motor 3 starts to rotate, the friction rod 304 is pulled outward so that the friction rod 304 abuts against the packaging bag outside the support plate 204. The friction rod 304 drives the fourth round rod 310 away from the second slider 311 through the first slider 302. When the servo motor 3 starts to rotate, the servo motor 3 drives the second gear 306 to rotate, and the second gear 306 drives the second disc 305 to rotate. Due to the centrifugal force, the second slider 311 slides outward in the fourth slide groove 308 on the second disc 305, so that the second disc 305 remains intact. The outer wall of the second disc 305 always abuts against the fourth round rod 310. At this time, the friction rod 304 always abuts against the stretched packaging bag to rub it.

[0044] Step 3: As the screw rod 206 extends, the volume of the packaging bag increases and the internal air pressure decreases. When the packaging bag is damaged, the air pressure sensor will detect that the internal pressure of the packaging bag increases, and the damaged packaging bag after stretching can be discovered in time. When the test is completed, the servo motor 3 is controlled to rotate in the opposite direction through the control panel 2. At this time, the second gear 306 drives the first gear 103 to rotate in the opposite direction, and the first gear 103 drives the first round rod 106 to rotate in the first slide groove 105 through the second slide groove 107. The clamping plate 101 no longer clamps the packaging bag. As the first gear 103 rotates, the first gear 103 drives the first disc 102 to rotate through the first round rod 106 and the first slide groove 105. The first disc 102 drives the ring 104 to rotate on the outer wall of the screw rod 206, and the screw rod 206 moves downward. At this time, the spring telescopic rod 202 extends until it returns to its initial position.

[0045] Although 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 appended claims and their equivalents.

Claims

1. A packaging bag tensile performance testing device, comprising a housing (1), and a driving mechanism located inside the housing (1), characterized in that: Also includes: The clamping assembly comprises a second gear (306), the outer wall of the second gear (306) is uniformly meshed with a plurality of first gears (103) along its circumference, the outer wall of the first gear (103) is symmetrically provided with a second slide groove (107), the upper end surface of the first gear (103) is abutted against a first disc (102), the outer wall of the first disc (102) is provided with a first slide groove (105), the upper end surface of the first disc (102) is symmetrically abutted against a clamping plate (101), the lower end surface of the clamping plate (101) is mounted with a first round rod (106), and the lower end surface of the first round rod (106) is slidably mounted on the inner walls of the first slide groove (105) and the second slide groove (107); The stretching mechanism comprises a friction component and a circular ring (104) fixedly mounted on a first circular disk (102); the inner wall of the circular ring (104) is threadedly connected to a screw rod (206), and the thread pitches of different screw rods (206) are different; the lower end surface of the screw rod (206) is mounted with a support plate (201), the upper end surface of the support plate (201) is symmetrically mounted with a spring telescopic rod (202), and the upper end surface of the spring telescopic rod (202) is mounted on a housing (1); when the clamping plate (101) clamps the packaging bag, the first gear (103) drives the first circular disk (102) to rotate through the first circular rod (106), and the first circular disk (102) drives the circular ring (104) to rotate; since the circular ring (104) is threadedly connected to the screw rod (206), the screw rod (206) moves upward, drives the support disk (204) to move, stretches the packaging bag, and compresses the spring telescopic rod (202), and at this time, the friction component rubs the packaging bag; The friction assembly comprises an extrusion assembly and a fixed frame (301); the outer wall of the fixed frame (301) is symmetrically provided with a plurality of third slide grooves (303); the inner wall of the third slide groove (303) is slidably mounted with a first slider (302); a friction rod (304) is fixedly mounted on a side of the first slider (302) away from the fixed frame (301); the extrusion assembly causes the friction rod (304) to always abut against the outer wall of the packaging bag; The driving mechanism comprises a servo motor (3), the servo motor (3) being fixedly mounted on the bottom wall of the housing (1), and an output shaft of the servo motor (3) passing through the housing (1) and being mounted on the second gear (306); A fixing block (205) is rotatably mounted on the outer wall of the circular ring (104); A second round rod (203) is mounted on a side of the screw rod (206) away from the support plate (201), and a support plate (204) is rotatably mounted on an upper end surface of the second round rod (203); A third round rod (309) is rotatably mounted at the center of the fixed frame (301), and a lower end surface of the third round rod (309) is fixedly connected to the second gear (306); A fourth round rod (310) is rotatably mounted between the first sliding blocks (302); The extrusion assembly comprises a second disc (305), the outer wall of the second disc (305) is evenly provided with a plurality of fourth slide grooves (308) along its circumference, the inner wall of the fourth slide groove (308) is slidably provided with a second slider (311), and the center position of the second disc (305) is fixedly connected to a third round rod (309); The second disc (305) is arranged in the fixed frame (301). When the second gear (306) drives the second disc (305) to rotate, due to the centrifugal force, the second slider (311) slides outward in the fourth slide groove (308) on the second disc (305), so that the second disc (305) remains intact. The outer wall of the second disc (305) always contacts the fourth round rod (310). At this time, the friction rod (304) always contacts the stretched packaging bag to rub it.

2. A packaging bag tensile performance testing device according to claim 1, characterized in that: A plurality of support rods (307) are evenly mounted on the lower end surface of the fixing frame (301) along its circumference, and the lower end surfaces of the support rods (307) are mounted on the outer shell (1).

3. A packaging bag tensile performance testing device according to claim 1, characterized in that: A control panel (2) is mounted on the outer wall of the housing (1).

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