Tensile machine for detecting PET (Polyethylene Terephthalate) film

Abstract

The utility model relates to the field of tensile machines, in particular to a tensile machine for detecting a PET (Polyethylene Terephthalate) film. The device comprises a rack. And the length measuring assembly is arranged on the rack and is used for measuring the required detection length of the PET film. And the tensile force detection assembly is arranged on the rack and is used for carrying out tensile force detection on the PET film. And the length measuring assembly comprises a flattening piece which is arranged on the rack and is used for flattening the PET film. And the marking plate is arranged on the smoothing piece and is used for marking the PET film. The PET film is pressed through the two sets of pressing plates, then the pressing plate below is pressed and pushed downwards to a proper position, the PET film is smoothed and prevented from being bent and warped, then the marking plate is pushed inwards along the through groove, and color marking is conducted on the PET film. The length required to be used can be accurately measured, and the situation that an operator cannot measure without carrying a ruler or errors exist in the manually measured length, so that the result of PET film tension detection is inaccurate is prevented.

Description

Technical Field

[0001] The utility model relates to the field of tensile testing machines, in particular to a tensile testing machine for PET film testing. Background Art

[0002] The tensile testing machine for PET film testing is a device specially used to test the tensile properties of PET film. The device can measure the tensile strength, elongation at break, elastic modulus and other parameters of PET film under stress to evaluate the mechanical properties and quality of PET film.

[0003] A Chinese patent document with authorization announcement number CN220322933U proposes a protective film tensile testing machine, which relates to the technical field of tensile testing machines, and includes a base plate, a tensile unit, a displacement unit, a limit unit and a clamp unit. The tensile unit and the displacement unit are arranged on the base plate, the clamp unit is arranged on the tensile unit, the limit unit is arranged on the displacement unit, and the limit unit is located on the side of the clamp unit.

[0004] In the above application, although the protective film can be located in the middle of the clamping plate when clamped, so as to avoid the deflection of the upper and lower ends of the protective film when clamped, which affects the test results, the protective film is not marked, and the required clamping position is still unclear when the protective film is clamped, which may lead to unclear length data of the protective film involved in deformation during the tensile test. In addition, since multiple tests are usually required to ensure the accuracy of the results when conducting tensile tests on PET films, the length of the PET film needs to be equal in each test so as not to interfere with the test results. However, existing tensile machines usually lack length measurement devices for PET films, and manual measurement by operators is prone to errors. Utility Model Content

[0005] In view of the problems existing in the background technology, a tensile testing machine for PET film testing is proposed.

[0006] The utility model proposes a tensile testing machine for PET film testing, comprising a frame. A length measuring component arranged on the frame for measuring the required testing length of the PET film. And a tensile testing component arranged on the frame for testing the tensile force of the PET film. The length measuring component comprises a smoothing piece arranged on the frame for smoothing the PET film. And a marking plate arranged on the smoothing piece for marking the PET film. The tensile testing component comprises a telescopic mechanism with a fixed end arranged on the frame. A tensile sensor connected to the telescopic end of the telescopic mechanism for testing the tensile force of the PET film. And a clamping member symmetrically arranged, one group connected to the frame, and the other group connected to the tensile sensor for clamping the PET film; the clamping member is driven by the telescopic mechanism to stretch the PET film.

[0007] Preferably, the smoothing member includes a smoothing plate arranged on the frame; a slide groove is symmetrically opened on one side of the smoothing plate; two groups of pressure plates are slidably connected in the slide grooves on both sides, and the side walls of the slide grooves on both sides are connected with clamping grooves; the side walls of the two groups of pressure plates are connected with protrusions slidably arranged at the clamping grooves; the side walls of the clamping grooves on both sides are connected with extrusion grooves; the bottoms of the extrusion grooves on both sides are connected with springs; the other ends of the springs on both sides are connected with limiting plates; the limiting plates extend into the corresponding clamping grooves under the elastic force of the springs.

[0008] Preferably, the side of the limiting plate facing the pressing plate is arc-shaped.

[0009] Preferably, both groups of pressing plates are provided with through grooves; the marking plates are slidably arranged at the two through grooves, respectively, and the ends of the marking plates facing the smoothing plate are stained with color powder.

[0010] Preferably, a plurality of grooves are provided on the side of the lower pressing plate facing the smoothing plate; and rollers are rotatably connected to the plurality of grooves.

[0011] Preferably, a scale is provided on the caressing plate; the scale is parallel to the slide groove.

[0012] Preferably, the clamping member includes a fixing box; one group of fixing boxes is connected to the frame, and the other group is connected to the tension sensor; a bidirectional threaded rod is rotatably connected to the side wall of the fixing box; one end of the bidirectional threaded rod passes through the fixing box and is connected to a knob, and a connecting plate is symmetrically threaded on it; and clamping plates are connected to both connecting plates.

[0013] Preferably, anti-skid pads are provided at opposite ends of the two pressing plates, and the anti-skid pads are corrugated.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] The tensile testing machine for PET film testing uses two sets of pressure plates to press the PET film, then presses the lower pressure plate and pushes it down to the appropriate position to smooth the PET film and prevent it from bending or warping. Then the marking plate is pushed inward along the through slot to mark the PET film with a color. The required length can be accurately measured to prevent the operator from not being able to measure without a ruler, or the length measured manually has errors, resulting in inaccurate results of the PET film tensile test. At the same time, it is also convenient to align the pressure plate with the mark during subsequent clamping, thereby ensuring that the tensile measurement length is consistent with the required length, further increasing the accuracy of the tensile test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the length measuring component structure of the utility model;

[0018] Figure 3 This is a cross-sectional view of the length measuring component structure of the utility model;

[0019] Figure 4 For this utility model Figure 3 Schematic diagram of the structure at A in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the pressing plate of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the tension detection component of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the clamping member of the utility model.

[0023] Figure numerals: 1. frame; 2. length measuring component; 21. smoothing piece; 211. smoothing plate; 212. slide groove; 213. pressure plate; 214. bump; 215. snap-in groove; 216. extrusion groove; 217. spring; 218. limit plate; 219. groove; 2110. roller; 22. marking plate; 221. through groove; 23. scale; 3. tension detection component; 31. clamping piece; 311. fixing box; 312. bidirectional threaded rod; 313. knob; 314. connecting plate; 315. clamping plate; 32. telescopic mechanism; 33. tension sensor; 4. PET film. DETAILED DESCRIPTION

[0024] Embodiment 1

[0025] like Figure 1-5 As shown, the utility model proposes a tensile testing machine for PET film testing, including a frame 1, a length measuring component 2 and a tensile force detection component 3. The length measuring component 2 is arranged on the frame 1 to measure the required detection length of the PET film 4. The tensile force detection component 3 is arranged on the frame 1 to perform tensile force detection on the PET film 4. The length measuring component 2 includes a smoothing member 21 arranged on the frame 1 to smooth the PET film 4. And a marking plate 22 arranged on the smoothing member 21 to mark the PET film 4. The tensile force detection component 3 includes a telescopic mechanism 32 with a fixed end arranged on the frame 1. A tensile force sensor 33 connected to the telescopic end of the telescopic mechanism 32 to detect the tensile force of the PET film 4. And a symmetrical arrangement, one group is connected to the frame 1, and the other group is connected to the tensile force sensor 33, and the clamping member 31 clamps the PET film 4; the clamping member 31 is driven by the telescopic mechanism 32 to stretch the PET film 4.

[0026] To further explain, the smoothing member 21 includes a smoothing plate 211 arranged on the frame 1; a slide groove 212 is symmetrically opened on one side of the smoothing plate 211; two groups of pressure plates 213 are slidably connected in the slide grooves 212 on both sides, and the side walls of the slide grooves 212 on both sides are connected with a snap-in groove 215; the side walls of the two groups of pressure plates 213 are connected with a protrusion 214 slidably set at the snap-in groove 215; the side walls of the snap-in grooves 215 on both sides are connected with an extrusion groove 216; the bottom of the extrusion grooves 216 on both sides are connected with a spring 217; the other ends of the springs 217 on both sides are connected with a limiting plate 218; the limiting plate 218 extends to the corresponding snap-in groove 215 under the elastic force of the spring 217. The PET film 4 can be pressed by the pressing plate 213 and then slid along the PET film 4 to flatten the PET film 4, which is convenient for subsequent measurement of the length of the PET film 4 required for tension test and prevents the PET film 4 from bending and warping, resulting in inaccurate subsequent length measurement, thereby increasing the error of tension test.

[0027] Further, the side of the limiting plate 218 facing the pressing plate 213 is arc-shaped, so that the protrusion 214 can push the limiting plate 218 to retract into the extrusion groove 216 from both sides of the limiting plate 218 .

[0028] To further illustrate, both sets of pressure plates 213 are provided with through grooves 221; the marking plates 22 are slidably set at the two through grooves 221, and the ends of the marking plates 22 facing the smoothing plates 211 are stained with color powder, which can be used to engrave color marks on the PET film 4, and it is also convenient to align the clamping plate 315 with the mark during subsequent clamping, thereby ensuring that the measured length is consistent with the required length, further increasing the accuracy of the tension test results.

[0029] Further, the side of the pressing plate 213 at the bottom facing the smoothing plate 211 is provided with a plurality of grooves 219; the plurality of grooves 219 are all rotatably connected with rollers 2110. The rollers 2110 slide on the PET film 4 to smooth the PET film 4, which not only makes the pressing plate 213 slide more smoothly, but also prevents the pressing plate 213 from sliding directly on the PET film 4 and pressing out creases on the PET film 4, which affects the subsequent tensile test results.

[0030] Further explanation, a scale 23 is provided on the caressing plate 211; the scale 23 is parallel to the slide groove 212, so that the length measurement result is more intuitive and the value can be read more conveniently.

[0031] Embodiment 2

[0032] like Figure 1 and Figure 6-7As shown, the utility model proposes a tensile machine for PET film testing. Compared with the first embodiment, this embodiment further includes: the clamping member 31 includes a fixing box 311; one group of fixing boxes 311 is connected to the frame 1, and the other group is connected to the tension sensor 33; a bidirectional threaded rod 312 is rotatably connected to the side wall of the fixing box 311; one end of the bidirectional threaded rod 312 passes through the fixing box 311 and is connected to a knob 313, and a connecting plate 314 is symmetrically threaded thereon; and a clamping plate 315 is connected to both connecting plates 314. The PET film 4 can be clamped to prevent the PET film 4 from slipping.

[0033] Further, the two pressing plates 315 are provided with anti-skid pads at opposite ends, and the anti-skid pads are corrugated, so as to increase the friction between the PET film 4 and the pressing plates 315, so that the pressing plates 315 can clamp the PET film 4 more tightly.

[0034] The working principle of the utility model is as follows: when working, first push both sets of pressing plates 213 to the top of the chute 212, then place the PET film 4 between the smoothing plate 211 and the pressing plates 213, then press both sets of pressing plates 213 into the chute 212, so that the protrusion 214 squeezes the limiting plate 218 into the squeezing groove 216 and compresses the spring 217, so that the protrusion 214 is pushed into the deepest part of the clamping groove 215, then the spring 217 is reset to pop out the limiting plate 218, and the protrusion 214 is limited, so that the two sets of pressing plates 213 press the PET film 4. Then press the lower pressing plate 213 and push it downward to smooth the PET film 4, and according to the length of the PET film 4 to be taken, observe the value of the scale 23 at the same time, push the lower pressing plate 213 to the appropriate position, and then push the marking plate 22 inward along the through groove 221 to make color markings on the PET film 4.

[0035] Then, the pressing plate 213 is pulled out to take out the PET film 4, and the PET film 4 is placed between the two sets of pressing plates 315, so that the lower edge of the upper pressing plate 315 and the upper edge of the lower pressing plate 315 are respectively aligned with the two marks on the PET film 4, and then the two knobs 313 are respectively rotated to drive the bidirectional threaded rod 312 to rotate, so that the connecting plate 314 drives the pressing plate 315 to move relatively, and the PET film 4 is clamped. Finally, the telescopic mechanism 32 is started, and the telescopic end of the telescopic mechanism 32 retracts to drive the upper pressing member 31 to move upward, stretching the PET film 4, and at the same time, the tension value transmitted by the tension sensor 33 is read.

[0036] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A tensile testing machine for PET film testing, characterized in that: include Rack (1); A length measuring component (2) is arranged on the frame (1) and measures the required detection length of the PET film (4); and a tension detection component (3) arranged on the frame (1) for performing tension detection on the PET film (4); The length measuring assembly (2) comprises a smoothing member (21) arranged on the frame (1) for smoothing the PET film (4); and a marking plate (22) disposed on the smoothing member (21) for marking the PET film (4); The tension detection assembly (3) comprises a telescopic mechanism (32) whose fixed end is arranged on the frame (1); A tension sensor (33) connected to the telescopic end of the telescopic mechanism (32) for detecting the tension of the PET film (4); A symmetrical arrangement is provided, with one group connected to the frame (1) and the other group connected to the tension sensor (33), to clamp the PET film (4) with a pressing member (31); the pressing member (31) is driven by a telescopic mechanism (32) to stretch the PET film (4).

2. A tensile testing machine for PET film testing according to claim 1, characterized in that: The smoothing member (21) comprises a smoothing plate (211) arranged on the frame (1); a slide groove (212) is symmetrically provided on one side of the smoothing plate (211); two groups of pressure plates (213) are slidably connected in the slide grooves (212) on both sides, and the side walls of the slide grooves (212) on both sides are connected with a clamping groove (215); the side walls of the two groups of pressure plates (213) are connected with a protrusion (214) slidably arranged on the clamping groove (215); the side walls of the clamping grooves (215) on both sides are connected with an extrusion groove (216); the groove bottoms of the extrusion grooves (216) on both sides are connected with springs (217); the other ends of the springs (217) on both sides are connected with a limiting plate (218); the limiting plate (218) extends into the corresponding clamping groove (215) under the elastic force of the spring (217).

3. A tensile testing machine for PET film testing according to claim 2, characterized in that: The side of the limiting plate (218) facing the pressing plate (213) is arc-shaped.

4. A tensile testing machine for PET film testing according to claim 2, characterized in that: Through grooves (221) are formed on the two groups of pressing plates (213); the marking plates (22) are slidably arranged at the two through grooves (221), and one end of the marking plates (22) facing the smoothing plate (211) is stained with color powder.

5. A tensile testing machine for PET film testing according to claim 2, characterized in that: A plurality of grooves (219) are provided on a side of the pressing plate (213) located below and facing the smoothing plate (211); rollers (2110) are rotatably connected to the plurality of grooves (219).

6. A tensile testing machine for PET film testing according to claim 2, characterized in that: A scale (23) is provided on the caressing plate (211); the scale (23) is parallel to the slide groove (212).

7. A tensile testing machine for PET film testing according to claim 1, characterized in that: The clamping member (31) comprises a fixing box (311); one group of fixing boxes (311) is connected to the frame (1), and the other group is connected to the tension sensor (33); a bidirectional threaded rod (312) is rotatably connected to the side wall of the fixing box (311); one end of the bidirectional threaded rod (312) passes through the fixing box (311) and is connected to a knob (313), and a connecting plate (314) is symmetrically threadedly connected thereto; and both connecting plates (314) are connected to a clamping plate (315).

8. A tensile testing machine for PET film testing according to claim 7, characterized in that: The opposite ends of the two pressing plates (315) are each provided with an anti-skid pad, and the anti-skid pad is in a corrugated shape.

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