CN211401950U

CN211401950U - Tensile strength testing machine of PTC electric heating film

Info

Publication number: CN211401950U
Application number: CN201922416263.1U
Authority: CN
Inventors: 史宇正; 苏静
Original assignee: Jiangsu Yutuo New Materials Co ltd
Current assignee: Jiangsu Yutuo New Materials Co ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-09-01
Anticipated expiration: 2029-12-29

Abstract

A tensile strength testing machine for a PTC (positive temperature coefficient) electrothermal film belongs to the technical field of scientific analytical instruments/detection instruments and comprises a testing machine table, a testing machine frame, a tensioning driving assembly, an electrothermal film tensioning assembly I, an electrothermal film tensioning assembly II and an electrothermal film pressing assembly; the electric heating film tensioning assembly I and the electric heating film tensioning assembly II respectively comprise a pressing clamping jaw assembly, a sliding plate I, a screw, a group of screw supporting seats, a screw driving wheel I, a gear belt and a group of sliding blocks. The utility model discloses a tensile strength testing machine of PTC electric heat membrane, structural design is reasonable, high durability and convenient use, the horizontal tensile strength of electric heat membrane can be tested to the taut subassembly of electric heat membrane through setting up, the electric heat membrane that sets up simultaneously pushes down the subassembly and can carry out applying of longitudinal pressure, thereby test fore-and-aft tensile strength, the test of two directions, the comprehensiveness of electric heat membrane strength test has been improved, can test according to the demand of electric heat membrane in a flexible way, the accuracy of experimental result has been guaranteed, can whole observing the process of the experiment.

Description

Tensile strength testing machine of PTC electric heating film

Technical Field

The utility model belongs to the technical field of scientific analysis instrument detecting instrument, specifically, relate to a tensile strength testing machine of PTC electric heat membrane.

Background

The electrothermal film is divided into high-temperature and low-temperature electrothermal films. The high-temperature electrothermal film is generally used for electronic appliances, military affairs and the like, and is produced by the present science and technology. The electrothermal film heating system is different from a point heating system represented by a radiator, an air conditioner and a radiator and a line heating system represented by a heating cable, and is a low-carbon heating high-tech product researched and developed by adopting the modern aerospace technology in the field of surface heating.

The low-temperature electrothermal film is a semi-transparent polyester film which can generate heat after being electrified and is made by processing and hot-pressing conductive special printing ink and metal current-carrying strips between insulating polyester films. When the electric heating film is used as a heating body, heat is sent into a space in a radiation mode, so that a human body and an object are firstly warmed, and the comprehensive effect of the electric heating film is superior to that of a traditional convection heating mode. The low-temperature radiation electrothermal film system consists of a power supply, a temperature controller, a connecting piece, an insulating layer, an electrothermal film and a decorative surface layer. The power supply is communicated with the electrothermal film through a lead to convert electric energy into heat energy. Because the electric heating film is a pure resistance circuit, the conversion efficiency is high, and except a small loss (2%), most (98%) of the electric heating film is converted into heat energy.

After the low-temperature electrothermal film is produced, a series of tests are required to verify the quality of the product, so that the stability and the service life of the product in the subsequent use process are ensured. Wherein, the strength test is an important index of the low-temperature electrothermal film test. However, the current testing device is not in accordance with the actual use condition, so that the existing testing machine can not meet the requirement of testing the strength of the low-temperature electrothermal film, and therefore, a device capable of adapting to the testing of the low-temperature electrothermal film is urgently needed to be developed.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a tensile strength testing machine of PTC electric heat membrane has solved the problem that present tester can not accurately carry out low temperature electric heat membrane strength test.

The technical scheme is as follows: the utility model provides a tensile strength testing machine of PTC electric heat membrane, including test board, test frame, tensioning drive assembly, electric heat membrane tensioning assembly one, electric heat membrane tensioning assembly two and electric heat membrane pushing assembly, the test frame is fixed to be set up on the up end of test board, and the test frame is located the intermediate position of test board, electric heat membrane pushing assembly sets up in the test frame, electric heat membrane tensioning assembly one and electric heat membrane tensioning assembly two symmetry set up on the test board, and electric heat membrane tensioning assembly one and electric heat membrane tensioning assembly two are located the both sides of test frame, electric heat membrane tensioning assembly one and electric heat membrane tensioning assembly two all are connected with tensioning drive assembly; the electric heating film tensioning assembly I and the electric heating film tensioning assembly II are respectively composed of a compression clamping jaw assembly, a first sliding plate, a screw rod, a group of screw rod supporting seats, a first screw rod driving wheel, a gear belt and a group of sliding blocks, the compression clamping jaw assembly is arranged on the first sliding plate, the first sliding plate is arranged on the group of sliding blocks, the group of sliding blocks are sleeved on the screw rod, the screw rod is arranged on the group of screw rod supporting seats, one end of the screw rod is connected with the first screw rod driving wheel through a key and a key groove, the first screw rod driving wheel is connected with a tensioning driving assembly through the gear belt, and an electric heating film can be arranged between the compression clamping jaw assembly of the electric heating film tensioning assembly.

Furthermore, foretell tensile strength testing machine of PTC electric heat membrane, the symmetry is equipped with two slide rails on the test board, two slide rails are located the both sides of screw rod, slide one and two slide rail sliding connection.

Furthermore, tensile strength testing machine of foretell PTC electric heat membrane, taut drive assembly includes pivot supporting seat one and the screw drive wheel two that two symmetries set up that driving motor, speed reducer, pivot one, two symmetries set up, driving motor and speed reducer are connected, speed reducer and pivot one are connected, pivot one sets up on the pivot supporting seat one that two symmetries set up, the screw drive wheel two that two symmetries set up sets up the both ends at pivot one, the gear area cover is established on screw drive wheel one and screw drive wheel two.

Furthermore, the compression clamping jaw assembly comprises a support seat, an upper pressure plate, a lower pressure plate, a group of locking nuts, a group of lower pressure bolts and a group of springs, wherein the support seat is arranged in a right-angle plate, one end of the support seat is fixedly arranged on the first sliding plate, the other end of the support seat is provided with a rectangular opening, the upper pressure plate and the lower pressure plate are both in a rectangular flat plate shape, the upper pressure plate and the lower pressure plate are both positioned in the rectangular opening, the lower pressure plate is fixedly arranged on the lower end face of the rectangular opening, the upper pressure plate is connected with the upper end face of the rectangular opening through the group of springs, the group of locking nuts are fixedly arranged on the upper end face outside the support seat, the lower pressure bolts are in threaded connection with the locking nuts, the lower end portions of the lower pressure bolts can penetrate through the support seat to extend into the rectangular opening, the lower end portions of the lower pressure bolts extending into the rectangular opening, the electrothermal film can be compressed between the upper pressure plate and the lower pressure plate.

Furthermore, according to the tensile strength testing machine for the PTC electric heating film, the handle is arranged at the upper end part, far away from the upper pressure plate, of the lower pressure bolt.

Furthermore, the tensile strength testing machine of the PTC electric heating film is characterized in that an abrasion-resistant plate is arranged on the upper end face of the upper pressure plate, and the lower end of the lower pressure bolt extends into the rectangular opening and can abut against the abrasion-resistant plate.

Furthermore, the opposite surfaces of the upper pressing plate and the lower pressing plate are respectively provided with a rubber base plate.

Further, the tensile strength testing machine of the PTC electric heating film, the electric heating film pressing component comprises a lifting driving motor, a pressing support frame, a lifting adjusting screw sleeve, a guiding sliding plate and an electric heating film pressing plate, the pressing support frame is fixedly arranged on the testing rack, the lifting driving motor is fixedly arranged on the pressing support frame, the lifting driving motor is connected with the lifting adjusting screw through a coupler, the lifting adjusting screw sleeve is sleeved on the lifting adjusting screw and is in threaded connection with the lifting adjusting screw, the pressing support frame is provided with a guiding sliding sleeve I, the lifting adjusting screw sleeve is in sliding connection with the guiding sliding sleeve I, the lower end of the lifting adjusting screw sleeve extends out of the guiding sliding sleeve I, the lower end of the lifting adjusting screw sleeve, which extends out of the guiding sliding sleeve I, is fixedly connected with the guiding sliding plate, and the electric heating film lower pressing plate is fixedly arranged on the lower end face of the guide sliding plate.

Furthermore, foretell tensile strength testing machine of PTC electric heat membrane, be equipped with the direction connecting plate on the outer wall of lift adjusting screw cover, be equipped with a set of guide post one on the pushing down support frame, the direction connecting plate cover is established on a set of guide post one to the direction connecting plate can follow a set of guide post one and reciprocate.

Furthermore, according to the tensile strength testing machine for the PTC electric heating film, the testing machine frame is provided with the second group of guide posts, the guide sliding plate is sleeved on the second group of guide posts, and the guide sliding plate can move up and down along the second group of guide posts.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: tensile strength testing machine of PTC electric heat membrane, structural design is reasonable, high durability and convenient use, the horizontal tensile strength of electric heat membrane can be tested to the taut subassembly of electric heat membrane through setting up, the electric heat membrane that sets up simultaneously pushes down the subassembly and can carry out exerting of longitudinal pressure, thereby test fore-and-aft tensile strength, the test of two directions, the comprehensiveness of electric heat membrane strength test has been improved, can test according to the demand of electric heat membrane in a flexible way, the accuracy of experimental result has been guaranteed, can whole journey observe the test process, the suitability is wider, and the operation is simple in addition, the accuracy and the advantages such as work efficiency of improvement experimental result.

Drawings

Fig. 1 is a schematic structural view of a tensile strength testing machine for a PTC electrothermal film according to the present invention;

fig. 2 is a first top view of the tensile strength testing machine for the PTC electrothermal film of the present invention;

fig. 3 is a second top view of the tensile strength testing machine for the PTC electrothermal film of the present invention;

fig. 4 is a front view of the clamping jaw assembly of the present invention;

fig. 5 is a left side view of the clamping jaw assembly of the present invention;

fig. 6 is a schematic structural view of the electric heating film pressing assembly of the present invention.

In the figure: the device comprises a testing machine table 1, a slide rail 11, a testing frame 2, a second guide column 21, a tensioning driving assembly 3, a driving motor 31, a speed reducer 32, a first rotating shaft 33, a first rotating shaft supporting seat 34, a second screw rod driving wheel 35, a first electrothermal film tensioning assembly 4, a pressing clamping jaw assembly 41, a supporting seat 411, an upper pressing plate 412, a lower pressing plate 413, a locking nut 414, a lower pressing bolt 415, a spring 416, a rectangular opening 417, a wear-resisting plate 418, a rubber base plate 419, a handle 4110, a first sliding plate 42, a screw 43, a screw rod supporting seat 44, a first screw rod driving wheel 45, a gear belt 46, a sliding block 47, a second electrothermal film tensioning assembly 5, a second electrothermal film pressing assembly 6, a lifting driving motor 61, a pressing supporting frame 62, a lifting adjusting screw 63, a lifting adjusting screw sleeve 64, a guide sliding plate 65, a lower electrothermal film pressing plate 66, a first guide.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

The tensile strength testing machine for the PTC electrothermal film shown in figures 1-3 comprises a testing machine table 1, a testing machine frame 2, a tensioning driving assembly 3, a first electrothermal film tensioning assembly 4, a second electrothermal film tensioning assembly 5 and a second electrothermal film pressing assembly 6, wherein the testing machine frame 2 is fixedly arranged on the upper end surface of the testing machine table 1, the testing machine frame 2 is positioned in the middle of the testing machine table 1, the lower electrothermal film pressing assembly 6 is arranged on the testing machine frame 2, the first electrothermal film tensioning assembly 4 and the second electrothermal film tensioning assembly 5 are symmetrically arranged on the testing machine table 1, the first electrothermal film tensioning assembly 4 and the second electrothermal film tensioning assembly 5 are positioned on two sides of the testing machine table 2, and the first electrothermal film tensioning assembly 4 and the second electrothermal film tensioning assembly 5 are both connected with the tensioning driving assembly 3; the electric heating film tensioning assembly I4 and the electric heating film tensioning assembly II 5 respectively comprise a compression clamping jaw assembly 41, a sliding plate I42, a screw 43, a group of screw supporting seats 44, a screw driving wheel I45, a gear belt 46 and a group of sliding blocks 47, the compression clamping jaw assembly 41 is arranged on the sliding plate I42, the sliding plate I42 is arranged on the group of sliding blocks 47, the group of sliding blocks 47 is sleeved on the screw 43, the screw 43 is arranged on the group of screw supporting seats 44, one end of the screw 43 is connected with the screw driving wheel I45 through a key and a key groove, the screw driving wheel I45 is connected with the tension driving assembly 3 through the gear belt 46, and an electric heating film can be arranged between the compression clamping jaw assembly 41 of the electric heating film tensioning assembly I4 and the compression clamping jaw assembly 41 of the tension electric heating. In addition, the test board 1 is symmetrically provided with two slide rails 11, the two slide rails 11 are located on two sides of the screw 43, and the first slide plate 42 is connected with the two slide rails 11 in a sliding manner. The electric heating film tensioning assembly I4 and the electric heating film tensioning assembly II 5 are symmetrically arranged, the electric heating film tensioning assembly I4 and the electric heating film tensioning assembly II 5 are provided with the same driving system tensioning driving assembly 3, therefore, after the electric heating film is tightly pressed on the pressing clamping jaw assembly 41, the tensioning driving assembly 3 drives the electric heating film tensioning assembly I4 and the electric heating film tensioning assembly II 5 to move towards two sides simultaneously, and the tensile strength of the electric heating film 10 can be tested.

Example two

Based on an embodiment structure, the tensioning driving assembly 3 shown in fig. 1 includes a driving motor 31, a speed reducer 32, a first rotating shaft 33, two first rotating shaft supporting seats 34 symmetrically arranged, and two second screw driving wheels 35 symmetrically arranged, the driving motor 31 is connected to the speed reducer 32, the speed reducer 32 is connected to the first rotating shaft 33, the first rotating shaft 33 is arranged on the two first rotating shaft supporting seats 34 symmetrically arranged, the two second screw driving wheels 35 symmetrically arranged are arranged at two ends of the first rotating shaft 33, and a gear belt 46 is sleeved on the first screw driving wheels 45 and the second screw driving wheels 35. The tensioning driving component 3 with the structure drives the first rotating shaft 33 to rotate through the driving motor 31, and the first rotating shaft 33 can simultaneously drive the first electrothermal film tensioning component 4 and the second electrothermal film tensioning component 5 to move.

EXAMPLE III

The pressing jaw assembly 41 shown in fig. 4 and 5 comprises a supporting seat 411, an upper pressing plate 412, a lower pressing plate 413, a group of lock nuts 414, a group of lower pressing bolts 415 and a group of springs 416, wherein the supporting seat 411 is arranged in a right-angle plate, one end of the supporting seat 411 is fixedly arranged on the first sliding plate 42, the other end of the supporting seat 411 is provided with a rectangular opening 417, the upper pressing plate 412 and the lower pressing plate 413 are both in a rectangular flat plate shape, the upper pressing plate 412 and the lower pressing plate 413 are both positioned in the rectangular opening 417, the lower pressing plate 413 is fixedly arranged on the lower end surface of the rectangular opening 417, the upper pressing plate 412 is connected with the upper end surface of the rectangular opening 417 through the group of springs 416, the group of lock nuts 414 is fixedly arranged on the upper end surface of the outer part of the supporting seat 411, the lower pressing bolts 415 and the lock nuts 414 are connected in a threaded manner, and the lower end part of, the lower end of the lower pressing bolt 415 extending into the rectangular opening 417 can abut against the upper pressing plate 412, and an electric heating film can be pressed between the upper pressing plate 412 and the lower pressing plate 413. The upper end of the lower pressing bolt 415 far away from the upper pressing plate 412 is provided with a handle 4110. The upper pressing plate 412 is provided with a wear plate 418 on the upper end surface, and the lower pressing bolt 415 extends into the rectangular opening 417 and the lower end part can abut against the wear plate 418. And rubber cushion plates 419 are arranged on the opposite surfaces of the upper pressing plate 412 and the lower pressing plate 413. In the process that the lower pressing bolt 415 is gradually screwed into the locking nut 414, the upper pressing plate 412 can be pushed to gradually approach the lower pressing plate 413, and the upper pressing plate 412 presses the electrothermal film 10 on the lower pressing plate 413.

Example four

The electric heating film pressing component 6 shown in fig. 6 comprises a lifting driving motor 61, a pressing support frame 62, a lifting adjusting screw 63, a lifting adjusting screw sleeve 64, a guiding sliding plate 65 and an electric heating film pressing plate 66, wherein the pressing support frame 62 is fixedly arranged on the testing machine frame 2, the lifting driving motor 61 is fixedly arranged on the pressing support frame 62, the lifting driving motor 61 is connected with the lifting adjusting screw 63 through a shaft coupler, the lifting adjusting screw sleeve 64 is sleeved on the lifting adjusting screw 63, the lifting adjusting screw sleeve 64 is in threaded connection with the lifting adjusting screw 63, a guiding sliding sleeve I67 is arranged on the pressing support frame 62, the lifting adjusting screw sleeve 64 is in sliding connection with the guiding sliding sleeve I67, the lower end part of the lifting adjusting screw sleeve 64 extends out of the guiding sliding sleeve I67, the lifting adjusting screw sleeve 64 extends out of the lower end part of the guiding sliding sleeve I67 and is fixedly connected with the guiding sliding plate 65, the electric heating film lower pressing plate 66 is fixedly arranged on the lower end face of the guide sliding plate 65. The outer wall of the lifting adjusting screw sleeve 64 is provided with a guide connecting plate 68, the pressing support frame 62 is provided with a group of guide posts one 69, the guide connecting plate 68 is sleeved on the group of guide posts one 69, and the guide connecting plate 68 can move up and down along the group of guide posts one 69. The test rack 2 is provided with a group of second guide posts 21, the guide sliding plate 65 is sleeved on the group of second guide posts 21, and the guide sliding plate 65 can move up and down along the group of second guide posts 21. The lifting driving motor 61 is started, the lifting adjusting screw 63 is driven to rotate, so that the lifting adjusting screw sleeve 64 can move up and down, the lifting adjusting screw sleeve 64 is in contact with the electric heating film 10 in the descending process, the electric heating film 10 can be continuously moved down and continuously pressed down, and the strength of the electric heating film 10 can be further tested.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a tensile strength testing machine of PTC electric heat membrane which characterized in that: the electric heating film tensioning device comprises a testing machine table (1), a testing frame (2), a tensioning driving assembly (3), an electric heating film tensioning assembly I (4), an electric heating film tensioning assembly II (5) and an electric heating film pressing assembly (6), wherein the testing frame (2) is fixedly arranged on the upper end face of the testing machine table (1), the testing frame (2) is located in the middle of the testing machine table (1), the electric heating film pressing assembly (6) is arranged on the testing frame (2), the electric heating film tensioning assembly I (4) and the electric heating film tensioning assembly II (5) are symmetrically arranged on the testing machine table (1), the electric heating film tensioning assembly I (4) and the electric heating film tensioning assembly II (5) are located on two sides of the testing machine table (2), and the electric heating film tensioning assembly I (4) and the electric heating film tensioning assembly II (5) are connected with the tensioning driving assembly (3);

wherein the electrothermal film tensioning assembly I (4) and the electrothermal film tensioning assembly II (5) respectively comprise a pressing clamping jaw assembly (41), a sliding plate I (42), a screw rod (43), a group of screw rod supporting seats (44), a screw rod driving wheel I (45), a gear belt (46) and a group of sliding blocks (47), the pressing clamping jaw assembly (41) is arranged on a first sliding plate (42), the first sliding plate (42) is arranged on a group of sliding blocks (47), the group of sliding blocks (47) is sleeved on the screw rod (43), the screw rod (43) is arranged on the group of screw rod supporting seats (44), one end of the screw rod (43) is connected with a screw rod driving wheel I (45) through a key and a key groove, the screw rod driving wheel I (45) is connected with the tensioning driving component (3) through a gear belt (46), an electric heating film can be arranged between the pressing clamping jaw assembly (41) of the electric heating film tensioning assembly I (4) and the pressing clamping jaw assembly (41) of the electric heating film tensioning assembly II (5).

2. The tensile strength tester for the PTC electrothermal film according to claim 1, wherein: the testing machine platform (1) is symmetrically provided with two sliding rails (11), the two sliding rails (11) are located on two sides of the screw rod (43), and the first sliding plate (42) is connected with the two sliding rails (11) in a sliding mode.

3. The tensile strength tester for the PTC electrothermal film according to claim 1, wherein: taut drive assembly (3) include pivot supporting seat one (34) and two screw drive wheel two (35) that the symmetry set up that driving motor (31), speed reducer (32), pivot (33), two symmetries set up, driving motor (31) and speed reducer (32) are connected, speed reducer (32) and pivot (33) are connected, pivot one (33) set up on pivot supporting seat one (34) that two symmetries set up, screw drive wheel two (35) that two symmetries set up the both ends at pivot one (33), gear belt (46) cover is established on screw drive wheel one (45) and screw drive wheel two (35).

4. The tensile strength tester for the PTC electrothermal film according to claim 1, wherein: the pressing clamping jaw assembly (41) comprises a supporting seat (411), an upper pressing plate (412), a lower pressing plate (413), a group of locking nuts (414), a group of lower pressing bolts (415) and a group of springs (416), wherein the supporting seat (411) is arranged in a right-angle plate, one end of the supporting seat (411) is fixedly arranged on a first sliding plate (42), a rectangular opening (417) is formed in the other end of the supporting seat (411), the upper pressing plate (412) and the lower pressing plate (413) are both rectangular flat plates, the upper pressing plate (412) and the lower pressing plate (413) are both located in the rectangular opening (417), the lower pressing plate (413) is fixedly arranged on the lower end face of the rectangular opening (417), the upper pressing plate (412) is connected with the upper end face of the rectangular opening (417) through the group of springs (416), the group of locking nuts (414) are fixedly arranged on the upper end face outside the supporting seat (411), the lower pressing bolt (415) is in threaded connection with the locking nut (414), the lower end portion of the lower pressing bolt (415) can penetrate through the supporting seat (411) and extend into the rectangular opening (417), the lower end portion of the lower pressing bolt (415) extending into the rectangular opening (417) can be abutted against the upper pressing plate (412), and the electric heating film can be pressed between the upper pressing plate (412) and the lower pressing plate (413).

5. The PTC electrothermal film tensile strength tester according to claim 4, wherein: and a handle (4110) is arranged at the upper end part of the lower pressing bolt (415) far away from the upper pressing plate (412).

6. The PTC electrothermal film tensile strength tester according to claim 5, characterized in that: and the upper end face of the upper pressure plate (412) is provided with a wear-resisting plate (418), and the lower end part of the lower pressure bolt (415) extending into the rectangular opening (417) can be abutted against the wear-resisting plate (418).

7. The PTC electrothermal film tensile strength tester according to claim 6, characterized in that: and rubber base plates (419) are arranged on the opposite surfaces of the upper pressing plate (412) and the lower pressing plate (413).

8. The tensile strength tester for the PTC electrothermal film according to claim 1, wherein: the electric heating film pressing component (6) comprises a lifting driving motor (61), a pressing support frame (62), a lifting adjusting screw rod (63), a lifting adjusting screw rod sleeve (64), a guiding sliding plate (65) and an electric heating film pressing plate (66), wherein the pressing support frame (62) is fixedly arranged on the test rack (2), the lifting driving motor (61) is fixedly arranged on the pressing support frame (62), the lifting driving motor (61) is connected with the lifting adjusting screw rod (63) through a coupler, the lifting adjusting screw rod sleeve (64) is sleeved on the lifting adjusting screw rod (63), the lifting adjusting screw rod sleeve (64) is in threaded connection with the lifting adjusting screw rod (63), a guiding sliding sleeve I (67) is arranged on the pressing support frame (62), the lifting adjusting screw rod sleeve (64) is in sliding connection with the guiding sliding sleeve I (67), and the lower end part of the lifting adjusting screw rod sleeve (64) extends out of the guiding sliding sleeve I (67), the lower end part of the lifting adjusting screw sleeve (64) extending out of the guide sliding sleeve I (67) is fixedly connected with the guide sliding plate (65), and the electric heating film lower pressing plate (66) is fixedly arranged on the lower end face of the guide sliding plate (65).

9. The tensile strength tester for the PTC electrothermal film according to claim 8, wherein: be equipped with guide connecting plate (68) on the outer wall of lift adjustment screw cover (64), be equipped with a set of guide post (69) on pushing down support frame (62), guide connecting plate (68) cover is established on a set of guide post (69) to guide connecting plate (68) can follow a set of guide post (69) and reciprocate.

10. The tensile strength tester for the PTC electrothermal film according to claim 8, wherein: the testing machine frame (2) is provided with a group of second guide posts (21), the guide sliding plate (65) is sleeved on the group of second guide posts (21), and the guide sliding plate (65) can move up and down along the group of second guide posts (21).