A plastic film tensile testing machine

Abstract

The application discloses a plastic film tensile testing machine, which comprises a base, a test frame, a fixed clamp assembly and a movable clamp device.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of film tensile testing equipment, and particularly to a plastic film tensile testing machine. BACKGROUND

[0002] The plastic film tensile testing machine is mainly used for measuring the mechanical properties of plastic film, composite film, adhesive, rubber, non-woven fabric and other materials.

[0003] The current plastic film tensile testing machine includes a base and a test frame. A fixed clamp block is arranged on the test frame. A clamp block is arranged on the test frame and can move up and down. The two ends of the film are fixed by the two clamp blocks, and then the movable clamp block is slowly moved to apply tension to the film. Finally, the test data is detected by a mechanical sensor.

[0004] However, during the test, various factors may cause the test results to not meet expectations, such as the film not being fully unfolded, being folded together at a certain position, or the film itself having some tiny cracks that the staff did not notice, which will affect the test results. SUMMARY

[0005] The present disclosure provides a plastic film tensile testing machine to solve the technical problem recognized by the inventor.

[0006] The present disclosure provides a plastic film tensile testing machine, which includes a base, a test frame including a lifting device, the test frame being arranged on the base, a fixed clamp assembly having two, one of which is arranged on the base, and the other is arranged at the top end of the test frame, a movable clamp device including a driving mechanism, two clamping assemblies, two arrangement assemblies and two detection assemblies, the driving mechanism is used to drive the two clamping assemblies and the two arrangement assemblies to move towards or away from each other, and the directions of movement of the clamping assemblies and the arrangement assemblies are opposite, wherein the lifting device drives the movable clamp device to move forward and backward along the height direction of the test frame.

[0007] Preferably, the driving mechanism comprises a fixed plate, a driving cylinder, a connecting piece, two first connecting rods, two second connecting rods and two connecting shafts, the fixed plate is in transmission connection with the lifting device, the driving cylinder is arranged on the fixed plate, the connecting piece is arranged on an output shaft of the driving cylinder, one end of each of the two first connecting rods is hingedly connected to two ends of the connecting piece, the other end of each of the two first connecting rods is connected to one end of the second connecting rod, one end of each of the two connecting shafts is fixed to the fixed plate, the middle part of each of the two second connecting rods is sleeved on the connecting shaft and can rotate about the connecting shaft, the other end of each of the two second connecting rods is connected with the clamping assembly, and one end of each of the two second connecting rods is further connected with the arranging assembly.

[0008] Preferably, the clamping assembly comprises a first fixed shaft, a first connecting block and a first clamping plate, one end of the first fixed shaft is connected to the second connecting rod, the other end is connected to the first connecting block, and the end of the first connecting block is connected with the first clamping plate.

[0009] Preferably, the arranging assembly comprises a second fixed shaft, a second connecting block and a roller, one end of the second fixed shaft is connected to the second connecting rod, the other end is connected to the second connecting block, and the end of the second connecting block is rotatably connected with the roller.

[0010] Preferably, the detection assembly comprises a mounting block and a detector, the mounting block is connected to the connecting shaft, and the other end is connected to the detector.

[0011] Preferably, the fixed clamp assembly comprises a mounting table, a supporting block, two adjusting lead screws, two rotating wheels and two second clamping plates, the supporting block is arranged on the mounting table, the two adjusting lead screws are threadedly connected to the two sides of the supporting block respectively, one end of each of the two adjusting lead screws, which are close to each other, is connected with the second clamping plate, and one end of each of the two adjusting lead screws, which are away from each other, is connected with the rotating wheel.

[0012] Preferably, the control panel is connected to the side of the test frame.

[0013] Preferably, an emergency stop button is further arranged, the emergency stop button is embedded on the surface of the base and is electrically connected with the controller.

[0014] Preferably, it further includes a positioning mechanism, including a positioning column, a positioning block and a driving component. The positioning column is disposed on one side of the test frame, the positioning block is movably connected to the positioning column, the driving component drives the positioning block to move back and forth in the height direction of the positioning column, and a positioning piece is disposed on the side of the moving fixture device, one end of the positioning piece is sleeved on the positioning column.

[0015] Preferably, the drive assembly includes a lead screw motor, a lead screw nut, and a connecting plate. The lead screw nut is threadedly connected to the output shaft of the lead screw motor, and one end of the connecting plate is connected to the lead screw nut, while the other end is connected to the positioning block.

[0016] The main beneficial effects of this disclosure are:

[0017] This invention uses two fixed clamping assemblies to fix both ends of a plastic film, and then uses a moving clamping device to select a specified length of film for tensile testing. During the movement of the moving clamping device, the section of film to be tested can be tidied and inspected to ensure that it does not fold or crack, thus affecting the final test results.

[0018] This invention integrates a clamping component, a finishing component, and a testing component into a mobile clamping device. Quality testing is performed during finishing, and the film is finally tested by fixing it with the clamping component. The structure is more compact, and the test time is not increased by adding finishing and testing steps.

[0019] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a front view of the tensile testing machine according to an embodiment of the present disclosure;

[0022] Figure 2 This is a side view of a tensile testing machine according to an embodiment of the present disclosure;

[0023] Figure 3 This is a schematic diagram of the structure of the moving clamp device according to an embodiment of the present disclosure;

[0024] Figure 4 Structure diagram of the fixed clamp assembly of the embodiment of the present disclosure;

[0025] Icon: 100-base; 200-test frame; 300-fixed clamp assembly; 301-mounting table; 302-supporting block; 303-adjusting screw rod; 304-second clamping plate; 305-turning wheel; 400-moving clamp device; 411-fixed plate; 412-driving cylinder; 413-connector; 414-first connecting rod; 415-second connecting rod; 416-connecting shaft; 421-first fixed shaft; 422-first connecting block; 423-first clamping plate; 431-second fixed shaft; 432-second connecting block; 433-roller; 441-mounting block; 442-detector; 501-control panel; 502-emergency stop button; 601-positioning column; 602-positioning block; 603-screw rod motor; 604-screw rod nut; 605-connector; 606-positioning sheet. DETAILED DESCRIPTION

[0026] The technical solutions of the present disclosure will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all embodiments.

[0027] Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0028] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. EMBODIMENT

[0030] As Figures 1-4As shown, the embodiment provides a plastic film tension testing machine, comprising a base 100, a test frame 200, a fixed clamp assembly 300 and a moving clamp device 400, the surface of the base 100 is mounted with the test frame 200; the test frame 200 comprises a lifting device, which is a prior art, for example, a motor matched with a screw rod transmission, which has high transmission efficiency and accuracy, and the specific structure and working principle thereof will not be described in detail here, the fixed clamp assembly 300 is two, which are respectively arranged on the surface of the base 100 and the top end of the test frame 200, and is used for fixing the two ends of the film, the moving clamp device 400 is one, which is drivingly connected with the lifting device, and is driven by the lifting device to move back and forth in the height direction of the test frame 200, and the moving clamp device 400 comprises a driving mechanism, two clamping assemblies, two arranging assemblies and two detecting assemblies; the driving mechanism is used for driving the two clamping assemblies and the two arranging assemblies to move close to or away from each other, and the moving directions of the clamping assemblies and the arranging assemblies are opposite.

[0031] In the embodiment, the two ends of the film to be tested are respectively fixed by the two fixed clamp assemblies 300, and in order to ensure the accuracy of the test, the length of the film is slightly longer than the distance between the two fixed clamp assemblies 300, so as to avoid the film being taut during fixing, and generating tension before the test starts, and when the film is fixed, the film passes through the clamping assembly, the arranging assembly and the detecting assembly in the moving clamp device 400, the two arranging assemblies are driven to move close to each other by the driving mechanism, and the two sides of the film are limited, at this time, the two clamping assemblies are synchronously driven to move away from each other, according to the length of the film to be tested, the moving clamp device 400 is driven as a whole to move upward by the lifting device, at this time, the arranging assembly and the film are gap-fitted, the film is arranged, and the film is prevented from being bent, and in the moving process, the detecting assembly detects the two sides of the film, if no film breakage or crack is detected, after the lifting device moves to the specified position, the two arranging assemblies are driven to separate by the driving mechanism, at this time, the two clamping assemblies are synchronously driven to move close to each other to clamp the film, after the clamping assembly clamps the film, the lifting device continues to drive the moving clamp device 400 to slowly and stably rise, and the film is subjected to tension test, which can be kept stationary after rising to the specified position according to the test requirements, or until the film is broken, so as to complete the test.

[0032] Specifically, the driving mechanism comprises a fixed plate 411, a driving cylinder 412, a connecting piece 413, two first connecting rods 414, two second connecting rods 415 and two connecting shafts 416, the fixed plate 411 is in the shape of an inverted "L", the side surface of the fixed plate 411 is drivingly connected with the lifting device, the fixed plate 411 is lifted by the lifting device, the driving cylinder 412 is installed at the top end of the fixed plate 411, the output shaft of the driving cylinder 412 is connected with the connecting piece 413, the two first connecting rods 414 are symmetrically hinged at the two sides of the connecting piece 413, the ends, away from the connecting piece 413, of the first connecting rods 414 are hingedly connected with the second connecting rods 415, the fixed plate 411 is fixedly installed with the two connecting shafts 416 on the surface, the middle parts of the two second connecting rods 415 are rotatably connected with the two connecting shafts 416 respectively, the two second connecting rods 415 can rotate about the connecting shafts 416, the other ends of the two second connecting rods 415 are connected with two clamping assemblies respectively, one end of each of the two second connecting rods 415 is also connected with an arranging assembly, and the two connecting shafts 416 are provided with the detecting assemblies respectively. In the embodiment, the output shaft of the driving cylinder 412 moves upwards to drive the connecting piece 413 to move upwards, at this moment, the connecting piece 413 pulls the first connecting rods 414 on the two sides to move upwards to drive the second connecting rods 415 to rotate, at this moment, the arranging assemblies at the upper parts of the second connecting rods 415 move close to each other, the clamping assemblies at the bottom parts of the second connecting rods 415 move away from each other, the two arranging assemblies move close to each other and leave a gap between them to allow the film to pass through, the film is arranged in the process of the arranging assemblies moving upwards to make the film stretch out, when the movable clamp device 400 moves to a specified position, the output shaft of the driving cylinder 412 moves downwards, at this moment, the second connecting rods 415 rotate about the connecting shafts 416, the arranging assemblies at the upper parts of the second connecting rods 415 move away from each other, and the clamping assemblies at the bottom parts of the second connecting rods 415 move close to each other, at this moment, the clamping assemblies clamp the film, and when the movable clamp device 400 continues to move upwards, the film can be pulled to perform a tensile test.

[0033] Specifically, the clamping assembly comprises a first fixed shaft 421, a first connecting block 422 and a first clamping plate 423, one end of the first fixed shaft 421 is connected with the bottom part of the second connecting rod 415, the first fixed shaft 421 extends in the opposite direction of the fixed plate 411, so that the film can extend upwards after passing through the clamping assembly and will not be blocked by the fixed plate 411, the first connecting block 422 is fixed at the end of the first fixed shaft 421, the first connecting block 422 is used for installing the first clamping plate 423, the two clamping assemblies are symmetrically arranged, so that the two first clamping plates 423 are oppositely arranged and can be folded to clamp the film when moving close to each other.

[0034] Specifically, the arrangement assembly includes a second fixed shaft 431, a second connecting block 432 and a roller 433. The second fixed shaft 431 is connected to the upper portion of the second connecting rod 415 at one end, and the second fixed shaft 431 and the first fixed shaft 421 extend in the opposite direction of the fixed plate 411. The end of the second fixed shaft 431 is connected with the second connecting block 432, and the second connecting shaft is rotatably connected with the roller 433. The two arrangement assemblies are symmetrically arranged, so that the two rollers 433 can be folded to form a gap when they are close to each other, and the design of the rotating roller 433 can reduce the friction with the film, avoiding the film being stretched by the roller 433 in advance.

[0035] Specifically, the detection assembly includes a mounting block 441 and a detector 442. The mounting block 441 is connected to the connecting shaft 416, and the other end is connected with the detector 442. The detector 442 can adopt a high-definition camera combined with an image processing algorithm to capture fine cracks on the surface of the film. The detector 442 is arranged between the arrangement assembly and the clamping assembly, and is used in cooperation with the arrangement assembly. After the arrangement assembly arranges the film, the two detectors 442 detect the film to ensure that the film is in good condition before the tensile test, thereby improving the accuracy of the test.

[0036] Specifically, the fixed clamp assembly 300 includes a mounting table 301, a support block 302, two adjusting lead screws 303, two rotating wheels 305 and two second clamping plates 304. One of the two mounting tables 301 of the fixed clamp is mounted on the surface of the base 100, and the other is mounted on the top end of the test stand 200. The support block 302 is arranged on the mounting table 301. Two adjusting lead screws 303 are respectively threadedly connected to the two sides of the support block 302. The ends of the two adjusting lead screws 303 close to each other are respectively connected with the second clamping plates 304. The ends of the two adjusting lead screws 303 away from each other are respectively connected with the rotating wheels 305. One end of the film is placed between the two second clamping plates 304. By rotating the rotating wheel 305, the adjusting lead screw 303 is driven to rotate, thereby controlling the movement of the second clamping plate 304 to clamp the film.

[0037] One of the embodiments of the application further includes a controller and a control panel 501. The controller is arranged in the interior of the base 100, and is used to control the operation of the testing machine. The control panel 501 is mounted on the side surface of the test stand 200. The surface of the control panel 501 is embedded with a display screen and control buttons. The parameters of the testing machine, such as the length of the film to be tested and the tensile parameters, can be set through the control panel 501.

[0038] Further, an emergency stop button 502 is embedded on the surface of the base 100 and is electrically connected with the controller. The emergency stop button 502 is used to control the emergency stop of the testing machine to prevent accidents.

[0039] In one embodiment of the present application, a positioning mechanism is further included, which comprises a positioning column 601, a positioning block 602 and a driving assembly. The positioning column 601 is arranged on one side of the test rack 200, the positioning block 602 is movably connected to the positioning column 601, and the driving assembly drives the positioning block 602 to move back and forth in the height direction of the positioning column 601. The side of the moving clamp device 400 is provided with a positioning sheet 606, and one end of the positioning sheet 606 is sleeved on the positioning column 601. The positioning column 601 is provided with a length scale, a film length for testing is preset, the positioning block 602 is moved to a specified position of the positioning column 601 by the driving assembly, then the moving clamp device 400 is driven to rise by the lifting device, when the positioning sheet 606 contacts the positioning column 601, the moving clamp device 400 is resisted, the controller instructs the lifting device to stop moving, then the driving mechanism drives the clamping assembly to clamp the film, and the driving assembly synchronously drives the positioning block 602 to move upward to the top end, so that the position of the moving clamp device 400 is released, and the subsequent tensile test is avoided from being affected.

[0040] Further, the driving assembly comprises a lead screw motor 603, a lead screw nut 604 and a connecting plate 605. The lead screw nut 604 is threadedly connected with the output shaft of the lead screw motor 603, one end of the connecting plate 605 is connected with the lead screw nut 604, and the other end is connected with the positioning block 602. The lead screw nut 604 is driven to move up and down by the lead screw motor 603, so as to drive the positioning block 602 to move, and the control stroke accuracy is high.

[0041] The working principle of the present application is as follows: first, the two ends of the film are fixed by the two fixed clamp assemblies 300, then the parameters are input by the control panel 501, the parameters of the test are adjusted, the controller instructs the driving assembly to control the positioning block 602 to move to a specified position of the positioning column 601, the driving cylinder 412 moves upward, the two arranging assemblies are close to each other, the film is arranged in the process of the upward movement of the arranging assembly, the moving clamp device 400 moves to a specified position, the output shaft of the driving cylinder 412 moves downward, the second connecting rod 415 rotates around the connecting shaft 416, the arranging assemblies at the upper part of the second connecting rod 415 are separated from each other, and the clamping assemblies at the bottom of the second connecting rod 415 are close to each other, so that the film is clamped by the clamping assemblies, and the film is detected by the detection assembly in the process of the upward movement, if the film is normal, the next operation is performed, and if the film is abnormal, the test is stopped; if the film is normal, the lifting device continues to drive the moving clamp device 400 to slowly and stably rise, the film is subjected to the tensile test, the lifting device can be kept stationary after rising to a specified position according to the test requirements, or the test is completed until the film is broken.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the present disclosure; although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A plastic film tensile testing machine, characterized in that, include: Base; A test frame, including a lifting device, is mounted on the base; A fixing clamp assembly, comprising two clamps, one disposed on the base and the other disposed on the top of the test frame; A mobile clamping device includes a drive mechanism, two clamping assemblies, two sorting assemblies, and two detection assemblies; the drive mechanism is used to drive the two clamping assemblies and the two sorting assemblies to move closer to or further away from each other, and the clamping assemblies and the sorting assemblies move in opposite directions; The lifting device drives the moving clamp device to move back and forth along the height direction of the test frame; The driving mechanism includes a fixed plate, a driving cylinder, a connecting member, two first connecting rods, two second connecting rods, and two connecting shafts. The fixed plate is connected to the lifting device. The driving cylinder is mounted on the fixed plate. The connecting member is mounted on the output shaft of the driving cylinder. One end of each of the two first connecting rods is hinged to both ends of the connecting member. The other end of each of the two first connecting rods is connected to one end of each of the second connecting rods. One end of each of the two connecting shafts is fixed to the fixed plate. The middle portions of each of the two second connecting rods are respectively sleeved on the connecting shafts and can rotate about the connecting shafts. The other ends of each of the two second connecting rods are respectively connected to two clamping assemblies. One end of each of the two second connecting rods is also respectively connected to two sorting assemblies. The two connecting shafts are respectively equipped with detection assemblies.

2. The plastic film tensile testing machine according to claim 1, characterized in that, The clamping assembly includes a first fixed shaft, a first connecting block, and a first clamping plate. One end of the first fixed shaft is connected to the second connecting rod, and the other end is connected to the first connecting block. The first clamping plate is connected to the end of the first connecting block.

3. The plastic film tensile testing machine according to claim 1, characterized in that, The sorting assembly includes a second fixed shaft, a second connecting block, and a roller. One end of the second fixed shaft is connected to the second connecting rod, and the other end is connected to the second connecting block. The roller is rotatably connected to the end of the second connecting block.

4. A plastic film tensile testing machine according to claim 1, characterized in that, The detection component includes a mounting block and a detector. The mounting block is connected to the connecting shaft at one end and to the detector at the other end.

5. A plastic film tensile testing machine according to claim 1, characterized in that, The fixing fixture assembly includes a mounting platform, a support block, two adjusting screws, two rotating wheels, and two second clamping plates. The support block is disposed on the mounting platform. The two adjusting screws are respectively threaded to both sides of the support block. The ends of the two adjusting screws that are close to each other are respectively connected to the second clamping plates, and the ends of the two adjusting screws that are far apart from each other are respectively connected to the rotating wheels.

6. A plastic film tensile testing machine according to claim 1, characterized in that, It also includes a controller and a control panel, the controller being electrically connected to the control panel and the moving fixture device, the controller being disposed inside the base, and the control panel being connected to the side of the test frame.

7. A plastic film tensile testing machine according to claim 6, characterized in that, It also includes an emergency stop button, which is embedded in the surface of the base and electrically connected to the controller.

8. A plastic film tensile testing machine according to claim 6, characterized in that, It also includes a positioning mechanism, including a positioning column, a positioning block and a driving component. The positioning column is disposed on one side of the test frame, the positioning block is movably connected to the positioning column, the driving component drives the positioning block to move back and forth in the height direction of the positioning column, and a positioning piece is disposed on the side of the moving fixture device, one end of the positioning piece is sleeved on the positioning column.

9. A plastic film tensile testing machine according to claim 8, characterized in that, The drive assembly includes a lead screw motor, a lead screw nut, and a connecting plate. The lead screw nut is threadedly connected to the output shaft of the lead screw motor. One end of the connecting plate is connected to the lead screw nut, and the other end is connected to the positioning block.

Images