A device for detecting the tensile properties of a film

Abstract

The application relates to the technical field of film material tensile property detection, and specifically provides a film material tensile property detection device, which comprises a detection platform, a support frame vertically and fixedly arranged on the detection platform, an upper clamp and a lower clamp vertically and slidably arranged on the support frame, the upper clamp and the lower clamp clamping the upper and lower ends of the film material, a rotating frame arranged on the detection platform, a detection clamp vertically arranged on the rotating frame, the detection clamp comprising two detection units, the two detection units clamping the film material between the upper clamp and the lower clamp, and a cutting assembly arranged on the detection platform, the cutting assembly cutting the film material into a vertical strip-shaped film material sample in a completely vertical state after clamping the upper and lower ends of the film material, ensuring that the vertical strip-shaped film material is parallel to the support frame, avoiding detection errors caused by clamping inclination, making the distance change detected by the detection clamp more accurate, and thus improving the precision of the film material tensile detection result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of film material tensile property detection, in particular to a film material tensile property detection device. BACKGROUND

[0002] The film material tensile property detection device is a special equipment for measuring the mechanical properties such as tensile strength, elongation at break, and elastic modulus of film materials such as thin films, sheets, and plates, and is widely used in quality detection and research and development of plastic, rubber, packaging materials, and composite materials.

[0003] The elongation of the film material is an important parameter. During testing, the operator can measure the change in the length of the gauge length section of the film material during the stretching process by drawing a gauge on the film material, so as to calculate the elongation of the film material. During testing, the stretching detection device applies a stretching force to the film material through the upper and lower clamps, and there are two detection clamps between the upper and lower clamps. The two detection clamps are clamped at the gauge positions on the film material, and the two detection clamps move up and down with the elongation of the film material. When the film material between the two detection clamps breaks, the distance moved by the two detection clamps at this time is the change in the length of the gauge length section, so that the elongation of the film material can be calculated.

[0004] However, when the above scheme is used to detect the tensile properties of the film material, if the operator installs the film material at an angle, the test result will be inaccurate. The clamping force of the detection clamp on the film material is generally constant, so that the stretching degree of the part of the film material clamped by the detection clamp is different from that of the other part of the film material. The clamping force of the two detection clamps will affect the elongation of the film material, so that the detection result of the film material is inaccurate. SUMMARY

[0005] Therefore, it is necessary to provide a film material tensile property detection device to solve the problem that the test result is inaccurate if the operator installs the film material at an angle when detecting the tensile properties of the film material.

[0006] The above purpose is achieved by the following technical scheme:

[0007] A film material tensile property detection device, comprising:

[0008] A detection platform, a support frame is vertically and fixedly arranged on the detection platform, an upper clamp and a lower clamp are vertically slidably arranged on the support frame, and the upper clamp and the lower clamp are used to clamp the upper and lower ends of the film material.

[0009] The cutting assembly can cut the film material into vertical strip-shaped film materials, and comprises a cutting flat plate and a supporting flat plate, both of which are hingedly arranged on the supporting frame, and at least two vertically extending knife grooves are uniformly arranged on the cutting flat plate, and a cutting knife is slidably arranged in the knife groove.

[0010] The rotating frame is vertically and rotatably arranged on the detection platform, and a detection clamp is vertically slidably arranged on the rotating frame, and the detection clamp comprises two detection units which can clamp the film material between the upper clamp and the lower clamp.

[0011] Further, the two vertically extending knife grooves are a group, and a plurality of groups are uniformly arranged on the cutting flat plate.

[0012] Further, the two detection units are a group, and the number of groups of detection units is the same as the number of groups of knife grooves, and the detection units are configured to clamp other vertical strip-shaped film materials when one of the plurality of vertical strip-shaped film materials is broken.

[0013] Further, the clamping force of the detection unit clamping the vertical strip-shaped film material is negatively correlated with the stretching degree of the vertical strip-shaped film material.

[0014] The detection unit comprises a clamping plate and a clamping block, the clamping block is elastically slidably arranged on the clamping plate, the clamping block and the clamping plate are used for clamping the vertical strip-shaped film material, a rotating rod is axially slidably arranged in the clamping plate, one end of the rotating rod is in rolling contact with the rotating frame, the other end of the rotating rod is in rotational connection with the clamping block, a limiting ring is threadedly connected to the outer periphery of the rotating rod, the limiting ring can move axially relative to the rotating rod, an elastic member is sleeved on the outer periphery of the rotating rod, the elastic member abuts against the limiting ring and the clamping plate respectively, and the elastic member is used to push the rotating rod to pull the clamping block close to the clamping plate.

[0015] Further, a connecting through groove is formed in the clamping plate, the rotating rod is located in the connecting through groove, a protrusion is arranged on the outer periphery of the limiting ring, a sliding groove is arranged in the connecting through groove, the sliding groove is parallel to the connecting through groove, and the protrusion is located in the sliding groove.

[0016] Further, the elastic member is a compression spring.

[0017] Further, a driving assembly is arranged on the supporting frame, and the driving assembly is used to drive the upper clamp and the lower clamp to move away from or close to each other.

[0018] Further, the driving assembly comprises a first hydraulic cylinder and a second hydraulic cylinder, and the extension ends of the first hydraulic cylinder and the second hydraulic cylinder are fixedly connected with the upper clamp and the lower clamp respectively.

[0019] The beneficial effects of the present application are:

[0020] The present application cuts the film material by setting the cutting assembly, and first clamps the upper and lower ends of the film material raw material, and then cuts it into a vertical strip-shaped film material sample completely in a vertical state by the cutting assembly, ensures that the vertical strip-shaped film material is parallel to the support frame, avoids detection errors caused by clamping inclination, makes the distance change detected by the detection clamp more accurate, and thus improves the precision of the film material tensile detection result.

[0021] The present application can cut more vertical strip-shaped film materials to obtain at least two samples by setting multiple knife grooves on the cutting assembly, two knife grooves being a group, and there being multiple groups of knife grooves, and the upper clamp and the lower clamp simultaneously stretch multiple vertical strip-shaped film materials, and when one of the multiple vertical strip-shaped film materials breaks, the detection clamp is clamped on the other unbroken vertical strip-shaped film material, thereby reducing the influence of the detection clamp on the stretching of the vertical strip-shaped film material.

[0022] The present application further reduces the influence of the detection clamp on the stretching of the vertical strip-shaped film material by setting the detection clamp with variable clamping force, and the clamping force gradually decreases with the stretching of the vertical strip-shaped film material. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural schematic view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure;

[0024] Figure 2 The state schematic view of the film material cutting by the film material tensile property detection device provided by an embodiment of the present application is shown in the figure;

[0025] Figure 3 The state schematic view of the film material cutting by the film material tensile property detection device provided by an embodiment of the present application is shown in the figure;

[0026] Figure 4 The exploded view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure;

[0027] Figure 5 The X partial enlarged view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure; Figure 4

[0028] The state schematic view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure; Figure 6

[0029] The state schematic view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure; Figure 7

[0030] The state schematic view of the film material tensile property detection device provided by an embodiment of the present application is shown in the figure;Figure 8 A schematic view of a state of clamping a film material by a detection clamp of a film material tensile property detection device according to an embodiment of the present application;

[0031] Figure 9 A schematic view of a structure of a rotating frame, a detection clamp and a film material of a film material tensile property detection device according to an embodiment of the present application;

[0032] Figure 10 A partial enlarged view of a Y part of a film material tensile property detection device according to an embodiment of the present application; Figure 9 A front view of a film material tensile property detection device according to an embodiment of the present application;

[0033] Figure 11 A partial enlarged view of a Z part of a film material tensile property detection device according to an embodiment of the present application; Figure 9 A front view of a film material tensile property detection device according to an embodiment of the present application;

[0034] Figure 12 A sectional view along A-A of a film material tensile property detection device according to an embodiment of the present application; Figure 11 A sectional view along B-B of a film material tensile property detection device according to an embodiment of the present application.

[0035] Figure 13 A partial enlarged view of a Z part of a film material tensile property detection device according to an embodiment of the present application; Figure 12 A sectional view along B-B of a film material tensile property detection device according to an embodiment of the present application.

[0036] Figure 14 A sectional view along B-B of a film material tensile property detection device according to an embodiment of the present application. Figure 11 A sectional view along B-B of a film material tensile property detection device according to an embodiment of the present application.

[0037] Wherein:

[0038] 100, detection platform; 110, support frame; 120, upper clamp; 130, lower clamp; 140, chuck; 150, handle;

[0039] 200, cutting assembly; 210, cutting plate; 220, support plate;

[0040] 300, rotating frame; 310, vertical rod; 320, detection clamp; 330, clamping plate; 331, abutting block; 340, clamping block; 341, rotating block; 342, strip-shaped abutting surface; 350, rotating rod; 360, limiting ring; 370, connecting through slot; 380, elastic member; 390, gap;

[0041] 400, vertical strip-shaped film material; 410, scale line. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely used to explain the present application and are not used to limit the present application.

[0043] The serial numbers of components used herein, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. Unless otherwise specified, the "connection" and "coupling" in the present application include direct and indirect connections (couplings). In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application 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 application.

[0044] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of a first feature to a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] The present application provides a film material tensile property detection device. Figures 1-14 The present application provides a film material tensile property detection device.

[0046] A film material tensile property detection device is suitable for detecting the tensile ductility of a film, comprising a detection platform 100, a support frame 110 vertically and fixedly arranged on the detection platform 100, an upper clamp 120 and a lower clamp 130 vertically and slidably arranged on the support frame 110, the upper clamp 120 and the lower clamp 130 clamping the upper and lower ends of the film material (the film material is a detection sample), the upper clamp 120 and the lower clamp 130 being capable of stretching the film material when moving away from each other, a rotating frame 300 vertically and rotatably arranged on the detection platform 100, and a detection clamp 320 vertically and slidably arranged on the rotating frame 300, the detection clamp 320 comprising two detection units, the two detection units being clamped on the film material between the upper clamp 120 and the lower clamp 130, when the film material is stretched, the film material pulls the two detection units away from each other, when the film material is broken, the relative movement distance between the two detection units can be obtained, and the ductility of the film material can be calculated.

[0047] However, when the operator clamps the film material, the clamping position of the film material may be inclined, that is, the film material between the upper clamp 120 and the lower clamp 130 is not in a vertical state but is inclined. At this time, when the upper clamp 120 and the lower clamp 130 are moved away from each other to stretch the film material, the film material is not uniformly stressed, which causes the detection distance of the two detection units to be inaccurate, thereby affecting the detection result of the stretching performance of the film material.

[0048] Based on this, the film material clamping process is changed. The support frame 110 is provided with a cutting assembly 200. The cutting assembly 200 is used to cut the film material clamped between the upper clamp 120 and the lower clamp 130. The cutting assembly 200 can cut the whole film material into a vertical strip (the vertical strip film material 400 is also a sample, which has the same shape and size as the above-mentioned sample). The vertical strip film material 400 after cutting is completely in a vertical state, thereby avoiding the situation that the clamping is inclined when the film material is clamped, which causes the detection result to be inaccurate.

[0049] It can be understood that the upper and lower ends of the film material are clamped first, and then the film material is cut into a vertical strip film material 400 completely in a vertical state by the cutting assembly 200. The vertical strip film material 400 is parallel to the support frame 110. After the detection clamp 320 is clamped, the upper clamp 120 and the lower clamp 130 are driven to move away from each other. This can ensure that the film material is stretched in a vertical state, thereby improving the distance change accuracy of the detection of the detection clamp 320, and improving the accuracy of the film material stretching detection result.

[0050] Specifically, the cutting assembly 200 in the embodiment includes a cutting flat plate 210 and a supporting flat plate 220. As shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the cutting flat plate 210 and the supporting flat plate 220 are both hingedly arranged on the support frame 110. When the supporting flat plate 220 and the cutting flat plate 210 rotate around the hinge position, they can move close to each other, thereby clamping the film material clamped and fixed by the upper clamp 120 and the lower clamp 130. At least two vertical knife grooves (not shown in the figure) are formed on the cutting flat plate 210. A cutting knife (not shown in the figure) is slidably arranged in the knife groove. The cutting knife slides along the knife groove, thereby cutting the film material between the upper clamp 120 and the lower clamp 130 into a vertical strip. Then, the operator cuts off the waste material around the vertical strip film material 400. At this time, the vertical strip film material 400 is not affected by the waste material around it. The upper clamp 120 and the lower clamp 130 are moved away from each other, thereby uniformly stretching the vertical strip film material 400. At this time, the movement distance of the detection unit on the vertical strip film material 400 can accurately reflect the distance change when the film material is stretched.

[0051] It should be noted that in the prior art, when detecting the elongation of the film material, two marking lines 410 are drawn on the vertical strip film material 400, the two marking lines 410 are symmetrical about the midpoint of the length of the vertical strip film material 400, and the marking lines 410 on the vertical strip film material 400 are at the same height, as shown in Figure 6 Subsequently, the operator clamps the detection clamp 320 at the positions of the marking lines 410 of the vertical strip film material 400, respectively, and finally drives the upper clamp 120 and the lower clamp 130 away from each other to simultaneously stretch a plurality of vertical strip film materials 400. When the vertical strip film material 400 is stretched, the two detection units in the detection clamp 320 move away from each other. When the vertical strip film material 400 breaks, the two detection units record the distance between the two marking lines 410, so that the elongation of the film material can be calculated. It should be noted that only when the breaking position of the film material is between the two detection units, the recorded data is valid. If the breaking point is outside the two detection units, it means that the film material between the two marking lines 410 has not reached the limit, so the recorded data when the breaking point is outside the two detection units is invalid.

[0052] The detection clamp 320 in the prior art clamps the film material throughout the stretching process, and the clamping force of the detection clamp 320 is generally constant. Since the thickness of the film material gradually decreases when it is gradually stretched, the part of the film material clamped by the detection clamp 320 will be stretched to a different degree from other parts of the film material due to the influence of the clamping force, that is, the part of the film material clamped by the detection clamp 320 is stretched to a small degree, and the part of the film material not clamped by the detection clamp 320 is stretched to a large degree, thereby affecting the detection accuracy of the film material.

[0053] Therefore, the detection clamp 320 in the present application clamps the film material only when the stretching degree of the film material reaches the limit, thereby reducing the influence of the detection clamp 320. In order to obtain the stretching limit of the film material, the film material between the upper clamp 120 and the lower clamp 130 in the present embodiment is cut into a plurality of vertical strip film materials 400 (that is, the larger film material raw material is cut into a plurality of samples). When the upper clamp 120 and the lower clamp 130 move away from each other, the plurality of vertical strip film materials 400 are simultaneously stretched. The breaking of the plurality of vertical strip film materials 400 is not synchronized, so when the first breaking occurs, the other vertical strip film materials 400 are close to the stretching limit at this time, and therefore the stretching limit of the vertical strip film material 400 can be known. At this time, the detection clamp 320 is clamped at the positions of the marking lines 410 of the vertical strip film material 400, respectively.

[0054] It can be understood that when the vertical strip film 400 approaches the stretching limit, the stretching degree of the vertical strip film 400 quickly reaches the limit, so the detection clamp 320 has little effect on the continuous stretching of the vertical strip film 400 when clamping, and the position of the fracture of the vertical strip film 400 is recorded between the two detection units of the detection clamp 320, so that the distance between the two scale lines 410 at the moment of fracture of the vertical strip film 400 can be known, and the elongation of the vertical strip film 400 can be calculated according to the distance between the two scale lines 410 before stretching. The prior art detects the elongation of the film by multiple experiments, and the average of the results of multiple experiments is taken to ensure the accuracy of the experimental results. In the present application, multiple vertical strip films 400 can be detected in one experiment, and multiple experimental results can be obtained at the same time. The average of the multiple experimental data is taken to obtain a more accurate film elongation. Compared with the traditional multiple experiments, the present application can save a lot of time and improve the detection efficiency.

[0055] Specifically, when there are multiple knife grooves on the cutting flat plate 210 in the present application, the cutting flat plate 210 can cut multiple vertical strip films 400 at one time, and the multiple vertical strip films 400 are all in a vertical state, avoiding an inclined state, so that the multiple vertical strip films 400 can be uniformly stretched. Each knife groove has the above-mentioned cutting knife, the number of knife grooves is even, and two are a group. Each group of knife grooves can cut out a vertical strip film 400. At the same time, two detection units are a group, the number of groups of detection units is the same as the number of groups of knife grooves. Assuming that there are 8 knife grooves, 4 vertical strip films 400 can be cut out, and there are four groups of detection units. If there are 10 knife grooves, 5 vertical strip films 400 can be cut out, and there are five groups of detection units. The distance between the two knife grooves in each group is 2 cm, so that a vertical strip film 400 with a width of 2 cm can be cut out. The distance between adjacent groups of knife grooves is 1 cm. After the operator finishes cutting the film, the upper and lower ends of the 1 cm wide waste between adjacent vertical strip films 400 are cut off, so that adjacent vertical strip films 400 have a 1 cm wide gap 390. The gap 390 is used for the detection unit to pass through, and facilitates the detection unit to clamp the vertical strip film 400.

[0056] By setting multiple groups of knife grooves on the cutting plate 210, multiple vertical strip-shaped film materials 400 can be cut at one time, and each vertical strip-shaped film material 400 is in a vertical state, thereby ensuring that each vertical strip-shaped film material 400 is uniformly stretched, and the tensile limit of the vertical strip-shaped film material 400 can be known through the simultaneous stretching of multiple vertical strip-shaped film materials 400, and the detection unit can be clamped on the gauge line 410 of the vertical strip-shaped film material 400 at the appropriate time, thereby reducing the influence of the clamping action of the detection unit on the accuracy of the detection result of the tensile property of the vertical strip-shaped film material 400.

[0057] In a further embodiment, to further reduce the influence of the clamping action of the detection clamp 320 on the accuracy of the detection result of the tensile property of the vertical strip-shaped film material 400, the clamping force of the detection clamp 320 in this embodiment gradually decreases during the clamping of the vertical strip-shaped film material 400, that is, the clamping force of the detection clamp 320 is negatively correlated with the stretching degree of the vertical strip-shaped film material 400, that is, the greater the stretching degree of the vertical strip-shaped film material 400, the smaller the clamping force of the detection clamp 320, and the greater the stretching degree of the film material, the smaller the thickness of the film material, at this time, the clamping force of the detection clamp 320 on the film material is also reduced, thereby reducing the influence of the clamping force of the detection clamp 320 on the detection accuracy of the tensile property of the film material.

[0058] Specifically, the detection unit of the detection clamp 320 in this embodiment includes a clamping plate 330 and a clamping block 340, as shown in Figure 12 、 Figure 13 and Figure 14As shown, the clamping block 340 is elastically slidably arranged on the clamping plate 330, and the clamping surface of the clamping plate 330 and the clamping surface of the clamping block 340 have a gap 390 therebetween, which allows the film material to pass through, and the clamping block 340 can clamp the film material when it is close to the clamping plate 330. An axial sliding hole is arranged in the clamping plate 330, and a rotating rod 350 is arranged in the axial sliding hole. The rotating rod 350 has two parts, one part has a larger diameter, and the other part has a smaller diameter. The larger-diameter end of the rotating rod 350 is in rolling contact with the rotating frame 300, and the smaller-diameter end of the rotating rod 350 is in rotational connection with the clamping block 340. The outer periphery of the smaller-diameter part of the rotating rod 350 is coaxially and threadedly connected with a limiting ring 360. The limiting ring 360 can only move along the axial direction of the rotating rod 350 and cannot rotate, so when the rotating rod 350 rotates, it will drive the limiting ring 360 to move along the axial direction of the rotating rod 350 through the action of the threaded connection. An elastic member 380 is sleeved on the outer periphery of the smaller-diameter part of the rotating rod 350. The two ends of the elastic member 380 abut against the limiting ring 360 and the inside of the clamping plate 330, respectively. The elastic member 380 is a compression spring, which is compressed in the initial state. The elastic member 380 pushes the limiting ring 360 to drive the rotating rod 350 to move axially so that the clamping block 340 is close to the clamping plate 330, thereby clamping the vertical strip-shaped film material 400 between the clamping surfaces of the clamping block 340 and the clamping plate 330.

[0059] It can be understood that when the upper clamp 120 and the lower clamp 130 stretch the film material, the vertical strip-shaped film material 400 can drive the two detection units to move away from each other, and the clamping plates 330 of the two detection units move vertically on the rotating frame 300, as shown in Figure 12 As shown, the rotating frame 300 has a vertical rod 310, which is parallel to the rotating frame 300. The vertical rod 310 is in rolling contact with one end of the larger-diameter part of the rotating rod 350, so when the clamping plate 330 moves vertically, it can drive the rotating rod 350 to rotate around its own axis, and the rotating rod 350 drives the limiting ring 360 to move axially, as shown in Figure 12 and Figure 13 As shown, the limiting ring 360 moves to the left side, and the elastic member 380 between the limiting ring 360 and the clamping plate 330 is partially released, so the abutting force of the elastic member 380 on the limiting ring 360 decreases, which weakens the pushing effect on the rotating rod 350, thereby reducing the clamping force of the clamping block 340 on the film material. Moreover, the greater the degree of stretching of the film material, the farther the vertical movement of the detection unit, thereby making the rotating rod 350 drive the limiting ring 360 to move farther to the left side, and gradually reducing the clamping force of the clamping block 340 on the film material.

[0060] It should be noted that the directions of the threaded connections of the rotating rod 350 and the limiting ring 360 of the two detection units of the detection clamp 320 in the embodiment are opposite, that is, the directions of the helical grooves on the rotating rod 350 are opposite, so that the upper detection unit can move upward and the lower detection unit can move downward, and the rotating rod 350 can drive the limiting ring 360 to move to the left side.

[0061] Since the rotating rod 350 can rotate around its own axis and move axially, and the rotation around its own axis is realized by the rolling contact between the rotating rod 350 and the vertical rod 310, in order to avoid affecting the rolling friction between the vertical rod 310 and the rotating rod 350 when the rotating rod 350 moves axially, one end of the large-diameter part of the rotating rod 350 in the present application can be axially slidably sleeved with a sliding sleeve (not shown in the figure), the sliding sleeve is internally provided with a key groove extending along the axial direction of the sliding sleeve, and a limiting key is fixedly arranged on the outer periphery of the rotating rod 350 and slidably arranged in the key groove, so that the rotating rod 350 can move axially relative to the sliding sleeve without rotating relative to the circumferential direction, and the sliding sleeve of the present application is in rolling contact with the vertical rod 310, so that the rotation of the rotating rod 350 can be avoided when the rotating rod 350 moves axially.

[0062] More specifically, as shown in Figure 12 and Figure 13 , the present application has a connecting through groove 370 inside the clamping plate 330, which is used to accommodate the rotating rod 350, and the rotating rod 350 can rotate in the connecting through groove 370 and can move axially, and the outer periphery of the limiting ring 360 of the rotating rod 350 is provided with a protrusion (not shown in the figure), and a sliding groove (not shown in the figure) is formed in the connecting through groove 370, and the protrusion of the limiting ring 360 is slidably arranged in the sliding groove, and the protrusion and the sliding groove are arranged so that the limiting ring 360 can only move axially in the connecting through groove 370 and cannot rotate around its own axis, and further, the rotating rod 350 can drive the limiting ring 360 to slide along the axial direction of the rotating rod 350 to adjust the length of the elastic member 380 when the rotating rod 350 rotates.

[0063] It should be noted that, in order to avoid interference between the cutting assembly 200 and the multiple detection units, the rotating frame 300 in the embodiment is in an initial state as shown in Figure 6As shown, the multiple sets of detection units on the rotating frame 300 are not in contact with the vertical strip-shaped film material 400 and are away from the support frame 110, facilitating the cutting assembly 200 to cut the film material, so as to avoid the multiple sets of detection units affecting the cutting plate 210 and the support plate 220 to cut the film material. After cutting is completed, the cutting plate 210 and the support plate 220 rotate around the hinge position to reset. Then the operator pushes the rotating frame 300 to rotate around the rotating connection position. The rotating frame 300 drives the multiple sets of detection units to move into the gap 390 between the adjacent vertical strip-shaped film materials 400. Then the operator aligns the clamping surface of the clamping block 340 to the clamping surface of the clamping plate 330, so that the clamping surface of the clamping block 340 and the clamping surface of the clamping plate 330 clamp the vertical strip-shaped film material 400, thereby avoiding interference between the cutting assembly 200 and the multiple sets of detection units.

[0064] Specifically, in order to facilitate the clamping block 340 to clamp the vertical strip-shaped film material 400 after passing through the gap 390, the clamping block 340 in the embodiment is provided with a rotating block 341. One end of the rotating block 341 is rotationally connected to the clamping block 340. A clamping block (not shown in the figure) is arranged at the position where the rotating block 341 and the clamping block 340 are rotationally connected. The clamping block allows the rotating block 341 to rotate only 90°. In the initial state, the clamping block 340 clamps the vertical strip-shaped film material 400, as shown in Figure 5 As shown, the rotating block 341 is vertically erected upward. The rotating block 341 in the embodiment has an inclined surface. One end of the inclined surface is a strip-shaped abutting surface 342. The clamping plate 330 is fixedly provided with an abutting block 331 at one end close to the clamping block 340. The abutting block 331 also has an inclined surface. One end of the inclined surface is a clamping surface. The shape and size of the clamping surface are the same as those of the strip-shaped abutting surface 342. After the clamping block 340 passes through the gap 390 between the adjacent vertical strip-shaped film materials 400, the rotating block 341 rotates 90°, so that the strip-shaped abutting surface 342 on the rotating block 341 corresponds to the clamping surface on the abutting block 331, as shown in Figure 10 As shown, the abutting block 331 and the rotating block 341 clamp the vertical strip-shaped film material 400.

[0065] It should be further noted that the structure capable of avoiding interference between the cutting assembly 200 and the multiple sets of detection units is not limited to the above structure, but can also be other structures, such as a sliding frame (not shown in the figure). The multiple sets of detection units are arranged on the sliding frame. The sliding frame can slide along a direction perpendicular to the plane formed by the multiple vertical strip-shaped film materials 400. When the cutting assembly 200 works, the sliding frame is away from the support frame 110, so that the multiple sets of detection units on the sliding frame are away. When the cutting assembly 200 is reset after working, the sliding frame drives the multiple sets of detection units to be close. The multiple sets of detection units directly extend into the gap 390 between the adjacent vertical strip-shaped film materials 400. Of course, other structures can also be used, which are not limited herein.

[0066] In a further embodiment, the support frame 110 of the present application is provided with a driving assembly for driving the upper clamp 120 and the lower clamp 130 to move towards or away from each other, the driving assembly comprising a first hydraulic cylinder (not shown in the figure) and a second hydraulic cylinder (not shown in the figure), the telescopic ends of the first hydraulic cylinder and the second hydraulic cylinder being fixedly connected to the upper clamp 120 and the lower clamp 130 respectively, and the simultaneous shortening of the first hydraulic cylinder and the second hydraulic cylinder being able to drive the upper clamp 120 and the lower clamp 130 to move away from each other so as to stretch the film material.

[0067] Specifically, the upper clamp 120 and the lower clamp 130 in the present embodiment are each provided with two clamping heads 140, and a top rod is threadedly connected to the upper clamp 120 and the lower clamp 130, one end of the top rod abutting against the clamping head 140, and the other end of the top rod being provided with a handle 150, the operator rotating the top rod through the handle 150, the top rod pushing the clamping head 140 so that the two clamping heads 140 can clamp the film material, and the operator being able to adjust the clamping force of the clamping head 140 on the film material by rotating the top rod.

[0068] The specific working process of the film material stretching performance detection device provided by the present application is described in combination with the above embodiments:

[0069] Clamp the film material:

[0070] After the operator adjusts the positions of the upper clamp 120 and the lower clamp 130, the operator clamps the upper and lower ends of the film material, then rotates the cutting plate 210 and the supporting plate 220 about the hinge position so that the cutting plate 210 and the supporting plate 220 respectively contact the two surfaces of the film material, and the operator pushes the cutting knife inside the cutting groove of the cutting plate 210 to cut the film material into a plurality of vertical strip-shaped film materials 400, at this time the cutting plate 210 and the supporting plate 220 are rotated about the hinge position to reset, and the operator takes out the scissors to cut off the waste material between the adjacent vertical strip-shaped film materials 400, the width of the waste material being 1 cm, and after cutting off the waste material, the adjacent vertical strip-shaped film materials 400 are spaced 1 cm apart, and since the film material is clamped and fixed first and then cut, the plurality of vertical strip-shaped film materials 400 are parallel to each other, thereby avoiding the phenomenon of inclined vertical strip-shaped film materials 400.

[0071] Stretching:

[0072] When the cutting plate 210 and the supporting plate 220 are reset, as Figure 6As shown, the operator draws two parallel distance lines 410 on each of the vertical strip films 400, and the distance lines 410 are symmetric about the midpoint of the length of the vertical strip film 400. After drawing, the operator starts the first hydraulic cylinder (not shown) and the second hydraulic cylinder (not shown) to move the upper clamp 120 and the lower clamp 130 away from each other to start stretching the vertical strip films 400, and the length of the vertical strip films 400 gradually increases, and the specific state is as shown in Figure 7 As shown, the distance between the two distance lines 410 on the vertical strip films 400 gradually increases at this time, and when one of the vertical strip films 400 breaks and the breaking position is between the two distance lines 410, it means that the other vertical strip films 400 have reached or will soon reach the stretching limit, and at this time, the movement of the upper clamp 120 and the lower clamp 130 away from each other is stopped.

[0073] The detection clamp 320 clamps the vertical strip film 400:

[0074] The operator adjusts the height of the multiple sets of detection units of the detection clamp 320 on the rotating frame 300, so that the two detection units of each set correspond to the two distance lines 410 of the vertical strip film 400 respectively, and after adjustment, the operator rotates the rotating frame 300, and the rotating frame 300 drives the multiple sets of detection units to approach the vertical strip film 400, and the clamping block 340 of the detection unit penetrates through the gap 390 of the adjacent vertical strip film 400, and the clamping plate 330 and the clamping block 340 of each set of detection units are perpendicular to the vertical strip film 400, and the specific state is as shown in Figure 8 As shown, the operator finally rotates the rotating block 341 on each clamping block 340 by 90°, so that the strip-shaped abutting surface 342 of the rotating block 341 corresponds to the clamping surface of the abutting block 331 on the clamping plate 330. Since the clamping block 340 is connected to the rotating rod 350, and the elastic member 380 is sleeved on the rotating rod 350, under the action of the elastic member 380, the rotating block 341 and the abutting block 331 clamp the vertical strip film 400.

[0075] Continue to stretch:

[0076] After the detection unit is clamped on the vertical strip film 400, the upper clamp 120 and the lower clamp 130 continue to move away from each other, and under the action of the continuous stretching of the vertical strip film 400, since the detection unit clamps the vertical strip film 400, the detection unit moves synchronously with the vertical strip film 400, the clamping plate 330 of the detection unit slides on the vertical rod 310, the rotating rod 350 inside the clamping plate 330 is in rolling contact with the vertical rod 310 through a sliding sleeve (not shown in the figure), so that the rotating rod 350 can be driven to rotate around its own axis through the sliding sleeve while the clamping plate 330 moves, since the limiting ring 360 is slidably arranged in the connecting through slot 370 inside the clamping plate 330, the limiting ring 360 can only slide axially along the connecting through slot 370 and cannot rotate circumferentially, and the limiting ring 360 is threadedly connected with the rotating rod 350, so that the limiting ring 360 can be axially moved when the rotating rod 350 rotates around its own axis, as shown in Figure 12 and Figure 13 When the limiting ring 360 moves to the left, the length of the elastic member 380 between the limiting ring 360 and the clamping plate 330 increases, the elastic member 380 is partially released, the thrust force of the elastic member 380 on the limiting ring 360 decreases, thereby reducing the force of the rotating rod 350 pulling the clamping block 340, and further reducing the clamping force. It should be noted that the reduced clamping force can still clamp the vertical strip film 400, avoiding the influence of the excessive clamping force on the stretching performance of the vertical strip film 400.

[0077] Obtain the test results:

[0078] With the continuous stretching, the plurality of vertical strip films 400 are gradually broken, the distance sensor (not shown in the figure) is arranged on the clamping plate 330, the distance sensor can obtain the positions before and after the movement of the mark line 410, thereby calculating the movement distance of the mark line 410, the data of the breaking position of the vertical strip film 400 between two mark lines 410 are valid data, and the data of the breaking position of the vertical strip film 400 not between two mark lines 410 are invalid data, only the valid data are taken when calculating the elongation, and the plurality of valid data are averaged.

[0079] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present disclosure.

[0080] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A device for detecting the tensile properties of a film material, characterized by The utility model relates to a vertical film material testing device, including: a detection platform, a support frame vertically and fixedly arranged on the detection platform, an upper clamp and a lower clamp vertically slidingly arranged on the support frame, the upper clamp and the lower clamp being used for clamping the upper and lower ends of a film material; a cutting assembly capable of cutting the film material into vertical strip-shaped film materials, the cutting assembly including a cutting flat plate and a support flat plate, both of which are hingedly arranged on the support frame, the cutting flat plate being uniformly arranged with at least two vertically extending knife grooves, a cutting knife slidingly arranged in the knife groove; a rotating frame vertically and rotatably arranged on the detection platform, a detection clamp vertically slidingly arranged on the rotating frame, the detection clamp including two detection units capable of clamping the film material between the upper clamp and the lower clamp.

2. The film tensile property testing apparatus according to claim 1, wherein The two vertically extending knife grooves are a group, and the cutting flat plate is uniformly arranged with multiple groups of knife grooves.

3. The film tensile property testing apparatus according to claim 2, wherein The two detection units are a group, the number of groups of detection units is the same as the number of groups of knife grooves, and the detection units are configured to clamp other vertical strip-shaped film materials when one of the multiple vertical strip-shaped film materials is broken.

4. The film tensile property testing apparatus according to claim 3, wherein The clamping force of the detection units on the vertical strip-shaped film materials is negatively correlated with the stretching degree of the vertical strip-shaped film materials. The detection unit includes a clamping plate and a clamping block, the clamping block being elastically slidingly arranged on the clamping plate, the clamping block and the clamping plate being used for clamping the vertical strip-shaped film material, a rotating rod being axially slidingly arranged in the clamping plate, one end of the rotating rod being in rolling contact with the rotating frame, the other end of the rotating rod being rotatably connected with the clamping block, the rotating rod being threadedly connected with a limiting ring outside the circumference, the limiting ring being axially movable relative to the rotating rod, an elastic member being sleeved on the rotating rod outside the circumference, the elastic member abutting against the limiting ring and the clamping plate respectively, and the elastic member being used for pushing the rotating rod to pull the clamping block close to the clamping plate.

5. The film tensile property testing apparatus according to claim 4, wherein A connecting through groove is formed in the clamping plate, the rotating rod is located in the connecting through groove, a protrusion is arranged on the limiting ring outside the circumference, a sliding groove is arranged in the connecting through groove, the sliding groove is parallel to the connecting through groove, and the protrusion is located in the sliding groove.

6. The film tensile property testing apparatus according to claim 5, wherein The elastic member is a compression spring.

7. The film tensile property testing apparatus according to claim 1, wherein A driving assembly is arranged on the support frame, and the driving assembly is used for driving the upper clamp and the lower clamp to move away from or close to each other.

8. The film tensile property testing apparatus according to claim 7, wherein The driving assembly includes a first hydraulic cylinder and a second hydraulic cylinder, the extension end of the first hydraulic cylinder being fixedly connected with the upper clamp, and the extension end of the second hydraulic cylinder being fixedly connected with the lower clamp.

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