Film stretching test device

Abstract

The utility model relates to the technical field of film detection equipment, in particular to a film stretching test device. Comprising a detection table, a left fixing seat and a right fixing seat are arranged on the detection table, the right fixing seat is slidably connected with the detection table, a motor is arranged at one end of the detection table, a rotating shaft of the motor is connected with a lead screw, a driving block slidably connected with the detection table is in threaded connection with the lead screw, and a tension meter is arranged between the driving block and the right fixing seat. The tension meter comprises a shell connected with the right fixing base, a one-way clamping box is slidably connected into the shell, a tension spring is arranged between the one-way clamping box and the shell, the one-way clamping box is connected with the driving block, and the relative position of the one-way clamping box and the shell remains unchanged when the film is broken. A through groove penetrating through the upper surface and the lower surface of the shell is formed in a top plate of the shell, scales are arranged on the two sides of the through groove, and an indicating plate extending out of the through groove is arranged at the top of the one-way clamping box. According to the utility model, an operator can accurately read the value displayed by the tension meter when the film is broken.

Description

Technical Field

[0001] The utility model relates to the technical field of film detection equipment, in particular to a film stretching test device. Background Art

[0002] The film needs to be tested for tensile strength after production is completed. Patent application number 202310049805.4 discloses a polyimide film tensile strength testing device, which includes: a main unit, which includes a test table and a film body laid on the test table, a fixed box fixedly installed at one end of the side wall of the test table, and a mobile box corresponding to the fixed box is provided above the test table, and matching splints are installed on the opposite sides of the mobile box and the fixed box; a tensioning drive unit, which includes a drive motor fixedly installed at one end of the test table away from the fixed box and a screw fixedly connected to the output shaft of the drive motor, and a rectangular opening matching the screw is provided on the test table, and a moving nut is threaded on the screw, which determines the force when the film breaks by the value displayed by the dynamometer, but when the film breaks, the value displayed by the dynamometer will quickly return to zero, making it difficult for personnel to accurately read the value displayed by the dynamometer when the film breaks. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a film stretching test device in view of the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a film tensile testing device, including a testing platform, a left fixed seat and a right fixed seat are provided on the testing platform, the right fixed seat is slidably connected to the testing platform, a motor is provided at one end of the testing platform, the rotating shaft of the motor is connected to a screw, and a driving block slidably connected to the testing platform is threadedly connected to the screw, and a tension gauge is provided between the driving block and the right fixed seat, the tension gauge includes a shell connected to the right fixed seat, a one-way card box is slidably connected in the shell and a tension spring is provided between the two, the one-way card box is connected to the driving block, and the relative position of the one-way card box and the shell remains unchanged when the film breaks, the top plate of the shell is provided with a through groove running through its upper and lower surfaces and scales are provided on both sides of the through groove, and the top of the one-way card box is provided with an indicator plate extending from the through groove.

[0005] To further optimize the present technical solution, the one-way card box includes a box body with an opening at the top, a lifting plate is slidably connected to the box body, a pressure spring is arranged between the box body and the lifting plate, a card strip is arranged on the top surface of the lifting plate, the cross-section of the card strip is a right triangle, the side of the card strip close to the right fixed seat is perpendicular to the axis of the screw rod, and the side of the card strip away from the right fixed seat gradually moves away from the right fixed seat from top to bottom, the bottom surface of the top plate of the shell is provided with a plurality of card slots cooperating with the card strip, hollow portions are provided on both sides of the shell, and protruding plates extending from the hollow portions are provided on both sides of the lifting plate.

[0006] To further optimize this technical solution, a pull rod is provided on one side of the box body, a threaded portion is provided on the end of the pull rod away from the box body, a through hole is provided on the drive block, the pull rod passes through the through hole, and nuts connected to the threaded portion are provided on both sides of the drive block.

[0007] To further optimize the technical solution, a pressure plate for pressing one end of the film is detachably connected to the left fixing seat, and a pressure plate for pressing the other end of the film is detachably connected to the right fixing seat.

[0008] To further optimize the technical solution, a rubber layer is provided on the bottom surface of the pressing plate.

[0009] To further optimize this technical solution, the left fixing seat is provided with notches at both ends on a side away from the right fixing seat, so that a left convex plate is formed on this side of the left fixing seat, and threaded holes are provided at the front and rear ends of the left convex plate near the notches. The left convex plate also includes two pressing blocks, each of which is provided with a through hole, and a bolt passes through the through hole and is connected to the threaded hole. One side of the two pressing blocks is connected by a fixing bar.

[0010] To further optimize this technical solution, the right fixing seat is provided with notches at both ends on a side away from the left fixing seat, so that a right convex plate is formed on this side of the right fixing seat, and threaded holes are provided at the front and rear ends of the right convex plate near the notches. The right convex plate also includes two pressing blocks, each of which is provided with a through hole, and a bolt passes through the through hole and is connected to the threaded hole. One side of the two pressing blocks is connected by a fixing bar.

[0011] Compared with the prior art, the present invention has the following advantages: 1. The tensile gauge includes a shell and a one-way card box slidably connected thereto. When the film breaks, the relative positions of the one-way card box and the shell remain unchanged, so that the operator can accurately read the value displayed by the tensile gauge when the film breaks; 2. The left fixing seat and the right fixing seat are both provided with notches, thereby forming a left convex plate and a right convex plate on the two respectively, and the front and rear ends of the left convex plate and the right convex plate are connected to pressure blocks by bolts, so that the end of the film can be easily flattened. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a film stretching test device.

[0013] Figure 2 for Figure 1 Magnified view of point I in the middle.

[0014] Figure 3 Schematic diagram of the structure of the dynamometer.

[0015] Figure 4 for Figure 3 Magnified view of point II in the middle.

[0016] In the figure: 1. Testing table; 2. Left fixing seat; 21. Missing corner; 3. Right fixing seat; 31. Pressure plate; 32. Pressure block; 4. Motor; 5. Screw; 6. Force gauge; 61. Housing; 62. Tension spring; 63. Through slot; 64. One-way card box; 641. Pull rod; 642. Box body; 643. Pressure spring; 644. Lifting plate; 645. Indicator plate; 646. Extending plate; 647. Card strip; 65. Card slot; 66. Hollow part; 7. Driving block. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0018] Specific implementation method: Figure 1-4As shown, a film stretching test device includes a test platform 1, and a left fixing seat 2 and a right fixing seat 3 are provided on the test platform 1 so as to fix the two ends of the film. The right fixing seat 3 is slidably connected to the test platform 1. A motor 4 is provided at one end of the test platform 1, and a rotating shaft of the motor 4 is connected to a screw rod 5. The screw rod 5 is preferably rotatably connected to the test platform 1. A driving block 7 slidably connected to the test platform 1 is threadedly connected to the screw rod 5 (a threaded hole is provided on the driving block 7 to match the screw rod 5). A tensile force gauge 6 is provided between the driving block 7 and the right fixing seat 3. The tensile force gauge 6 includes a screw rod connected to the right fixing seat 3. The housing 61 has a one-way cartridge 64 slidably connected therein, with a tension spring 62 disposed therebetween. One end of the tension spring 62 is connected to the housing 61, and the other end is connected to the one-way cartridge 64. The one-way cartridge 64 is connected to the drive block 7. When the film breaks, the relative position of the one-way cartridge 64 and the housing 61 remains unchanged. The top plate of the housing 61 is provided with a through slot 63 extending through its upper and lower surfaces, with scales on both sides of the through slot 63. The top of the one-way cartridge 64 is provided with an indicator plate 645 extending from the through slot 63. The tension value can be read from the indicator plate 645. During testing, the ends of the film are fixed to the left and right fixing bases 2 and 3, respectively. The motor 4 is then turned on, and the film is stretched until it breaks. The motor 4 is then turned off. Since the relative position of the one-way cartridge 64 and the housing 61 remains unchanged when the film breaks, the scale corresponding to the indicator plate 645 represents the tension value applied to the film when it breaks.

[0019] The one-way card box 64 includes a box body 642 with an opening at the top, a lifting plate 644 is slidably connected to the box body 642, a pressure spring 643 is provided between the box body 642 and the bottom surface of the lifting plate 644, and a clamping strip 647 is provided on the top surface of the lifting plate 644. The cross section of the clamping strip 647 is a right triangle. The side of the clamping strip 647 close to the right fixed seat 3 is perpendicular to the axis of the screw rod 5, and the side of the clamping strip 647 away from the right fixed seat 3 gradually moves away from the right fixed seat 3 from top to bottom. The bottom surface of the top plate of the shell 61 is provided with a plurality of clamping grooves 65 cooperating with the clamping strip 647, and hollow portions 66 are provided on both sides of the shell 61. Extension plates 646 extending from the hollow portions 66 are provided on both sides of the lifting plate 644. Figure 3 As shown, when the drive block 7 moves rightward, the tension of the film causes the one-way cartridge 64 to move rightward relative to the housing 61. When the film breaks, the retaining strip 647 is trapped in the retaining slot 65, preventing the housing 61 from moving rightward relative to the one-way cartridge 64. The tension spring 62 also prevents the housing 61 from moving leftward relative to the one-way cartridge 64. Therefore, when the film breaks, the relative position of the one-way cartridge 64 and the housing 61 remains unchanged. After the reading is completed, the extension plate 646 is pressed downward to disengage the retaining strip 647 from the retaining slot 65, returning the indicator plate 645 to zero.

[0020] A pull rod 641 is provided on one side of the box body 642, and a threaded portion is provided on the end of the pull rod 641 away from the box body 642. A through hole is provided on the driving block 7, and the pull rod 641 passes through the through hole. Nuts connected to the threaded portion are provided on both sides of the driving block 7, so that the pull rod 641 and the driving block 7 can be fixed together.

[0021] A pressure plate 31 for pressing one end of the film is detachably connected to the left fixing base 2, and a pressure plate 31 for pressing the other end of the film is detachably connected to the right fixing base 3. Specifically, threaded holes are provided at the front and rear ends of the left and right fixing bases 2 and 3, and through holes are provided at the front and rear ends of the pressure plate 31, through which bolts pass to connect with the threaded holes.

[0022] The bottom surface of the pressing plate 31 is provided with a rubber layer to enhance the friction between the pressing plate 31 and the film.

[0023] The left fixing base 2 has a side away from the right fixing base 3, and both ends thereof are provided with a notched corner 21, so that this side of the left fixing base 2 forms a left convex plate. The front and rear ends of the left convex plate are provided with threaded holes near the notched corner 21. The left convex plate also includes two pressing blocks 32, each of which is provided with a through hole, through which a bolt passes and connects with the threaded hole. One side of the two pressing blocks 32 is connected by a fixing bar, so that the pressing blocks 32 do not rotate. The right fixing base 3 has a side away from the left fixing base 2, and both ends thereof are provided with a notched corner 21, so that this side of the right fixing base 3 forms a right convex plate. The front and rear ends of the right convex plate are provided with threaded holes near the notched corner 21. The left convex plate also includes two pressing blocks 32, each of which is provided with a through hole, through which a bolt passes and connects with the threaded hole. One side of the two pressing blocks 32 is connected by a fixing bar. When in use, first place the left end of the film on the left fixing seat 2, and insert the left end of the film into the lower right side of the pressure block 32 on the left fixing seat 2. The width of the film is greater than the width of the left convex plate, so that the front and rear sides of the film extend from the front side of the front pressure block 32 and the rear side of the rear pressure block 32 respectively. Then, pinch the extended part of the film with both hands and stretch it so that the left end of the film is flattened in the front-to-back direction. Then, tighten the bolts on the two pressure blocks 32 on the left side. Then, place the right end of the film on the right fixing seat 3, perform the above operation to flatten the right end of the film in the front-to-back direction and press it with the pressure block 32 on the right side. After confirming that there are no wrinkles on the film, fix the two pressure plates 31 on the left fixing seat 2 and the right fixing seat 3 respectively (the distance between the two through holes on the pressure plate 31 is greater than the width of the film). At this time, the width direction of the film is in a flattened state, and the folding or wrinkling of the film will not affect the tensile test results.

[0024] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A film tensile testing device, comprising a test platform (1), wherein a left fixed seat (2) and a right fixed seat (3) are provided on the test platform (1), wherein the right fixed seat (3) is slidably connected to the test platform (1), a motor (4) is provided at one end of the test platform (1), a rotating shaft of the motor (4) is connected to a screw rod (5), a driving block (7) slidably connected to the test platform (1) is threadedly connected to the screw rod (5), and a tensile gauge (6) is provided between the driving block (7) and the right fixed seat (3), characterized in that: The dynamometer (6) includes a shell (61) connected to the right fixing seat (3), a one-way card box (64) is slidably connected in the shell (61) and a tension spring (62) is provided between the two, the one-way card box (64) is connected to the driving block (7), and the relative position of the one-way card box (64) and the shell (61) remains unchanged when the film breaks, the top plate of the shell (61) is provided with a through groove (63) passing through the upper and lower surfaces thereof, and scales are provided on both sides of the through groove (63), and the top of the one-way card box (64) is provided with an indicator plate (645) extending from the through groove (63).

2. A film stretching test device according to claim 1, characterized in that: The one-way card box (64) includes a box body (642) with an opening at the top, a lifting plate (644) is slidably connected to the box body (642), a pressure spring (643) is provided between the box body (642) and the bottom surface of the lifting plate (644), a card strip (647) is provided on the top surface of the lifting plate (644), and the cross section of the card strip (647) is a right triangle. The side of the card strip (647) close to the right fixed seat (3) is perpendicular to the axis of the screw rod (5), and the side of the card strip (647) away from the right fixed seat (3) gradually moves away from the right fixed seat (3) from top to bottom. The bottom surface of the top plate of the shell (61) is provided with a plurality of card slots (65) cooperating with the card strip (647), hollow portions (66) are provided on both sides of the shell (61), and protruding plates (646) extending from the hollow portions (66) are provided on both sides of the lifting plate (644).

3. A film stretching test device according to claim 2, characterized in that: A pull rod (641) is provided on one side of the box body (642), and a threaded portion is provided at one end of the pull rod (641) away from the box body (642). A through hole is provided on the driving block (7), and the pull rod (641) passes through the through hole. Nuts connected to the threaded portion are provided on both sides of the driving block (7).

4. The film stretching test device according to claim 1, characterized in that: A pressure plate (31) for pressing one end of the film is detachably connected to the left fixing seat (2), and a pressure plate (31) for pressing the other end of the film is detachably connected to the right fixing seat (3).

5. The film stretching test device according to claim 4, characterized in that: The bottom surface of the pressing plate (31) is provided with a rubber layer.

6. A film stretching test device according to any one of claims 1 to 5, characterized in that: The left fixing seat (2) is provided with a notch (21) at both ends of a side away from the right fixing seat (3), so that a left convex plate is formed on this side of the left fixing seat (2), and threaded holes are provided at both front and rear ends of the left convex plate at positions close to the notch (21), and the left convex plate also includes two pressing blocks (32), each of which is provided with a through hole, and a bolt is connected to the threaded hole after passing through the through hole, and one side of the two pressing blocks (32) is connected by a fixing strip.

7. A film stretching test device according to any one of claims 1 to 5, characterized in that: The right fixing seat (3) is provided with a notch (21) at both ends of a side away from the left fixing seat (2), so that a right convex plate is formed on this side of the right fixing seat (3), and threaded holes are provided at the front and rear ends of the right convex plate at positions close to the notch (21). The right convex plate also includes two pressing blocks (32), each of which is provided with a through hole, and a bolt is connected to the threaded hole after passing through the through hole. One side of the two pressing blocks (32) is connected by a fixing strip.

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