CN110618239A - Device and method for testing stiffness and draping bending resistance of polymer - Google Patents

Abstract

The invention discloses a testing device and testing method for polymer stiffness and drape bending resistance, comprising a feeding assembly, a fixed hanging height testing assembly, a fixed hanging length testing assembly and a frame, the feeding assembly, the fixed hanging height testing assembly and the fixed overhang length test assembly are all installed on the frame, and are located below the feeding assembly, and the fixed overhang height test assembly is arranged at the output end on the right side of the fixed overhang length test assembly; The mechanism and the infrared detector, the lifting mechanism is installed on the frame, and the infrared detector is arranged on the working platform on the lifting mechanism; the fixed suspension length test assembly includes a platform support plate jacking mechanism and a test probe mechanism. The invention can quickly and accurately test the rigidity of the polymer and the bending resistance of the suspension under the two modes of fixed suspension height and fixed suspension length.

Description

Polymer stiffness and drape bending resistance test device and test method

technical field

The invention relates to the technical field of testing polymer physical properties, in particular to a testing device and testing method for polymer stiffness and drape bending resistance.

Background technique

Polymers can be generally divided into three categories according to their properties: plastics, rubber and fibers. Among them, the stiffness and drape bending resistance of polymers are important physical parameters to test the properties of polymers, which to a certain extent affect the applicable direction of polymers. and scope of application. Through instrumental testing and evaluation of polymer stiffness and drape bending resistance, it can guide its application environment more scientifically and reasonably, and match the optimal material for user needs and product standard requirements.

The stiffness and drape bending resistance of polymers are the basic and important characteristics that affect the quality of polymers and determine the performance of polymers. There have been many studies on the stiffness of polymers, in the literature "Determination of featured parameters to cluster stiffness handle of fabrics by the CHES-FY system" (Zhao-Qun Du, Rui-Qiang Gao, Tian-Xian Zhou, Lin-Ge He , Fibers and Polymers, 2013 (10): 1768-1775) reported the polymer stiffness test instrument, using the CHES-FY comprehensive evaluation system to measure the deformation process of the polymer under the action of the pulling force, through the pulling force The displacement curve relationship of the polymer under action is used to express the stiffness of the polymer. In addition, there are many researches on polymer drape bending resistance. In the literature "Effect of laundering on fabric drape, bending and shear" (Belinda T. Orzada, Mary AnnMoore, Billie J. Collier, Jonathan Yan Chen, International Journal of Clothing Science and Technology, 2009 (21): 44-55) reported that polymer drape bending resistance was obtained by KES-F shear tester and pure bending tester.

Chinese patent CN 109142690 A discloses a method for testing the multi-directional stiffness of a fabric. The method cuts the fabric to be tested into a circle, and realizes the measurement of the stiffness of the same fabric to be tested in all directions by adjusting the direction of the fabric to be tested. The method cannot measure the drape bending resistance of the polymer. Chinese patent CN 107478534 A discloses a composite material fabric stiffness tester, which flattens the composite material fabric to be tested by pressing a block and manually drags it to hang freely, and measures the drape distance and hem distance of the composite material fabric , but the device needs to be manually manipulated to artificially affect the physical properties of the polymer to be tested.

Contents of the invention

In view of this, the present invention aims at the technical problems of inaccurate polymer overhang characteristics, bending characteristics and small application range in the above-mentioned prior art, and provides a method that can quickly and accurately test the polymer polymer under the two modes of fixed overhang height and fixed overhang length. The test device and test method for object stiffness and drape bending resistance.

The technical solution of the present invention is to provide a kind of polymer rigidity of the following structure and drape bending resistance testing device, comprise feed assembly, fixed suspension height test assembly, fixed suspension length test assembly and frame, described feed assembly, The fixed overhang height test assembly and the fixed overhang length test assembly are all installed on the frame, the fixed overhang height test assembly and the fixed overhang length test assembly are installed oppositely, and are all located below the feeding assembly, and the fixed height test assembly is arranged on the The output terminal on the right side of the fixed suspension length test component;

The fixed hanging height test assembly includes a lifting mechanism and an infrared detector, the lifting mechanism is installed on the frame, and is located below the feeding assembly, and the infrared detector is arranged on the working platform on the lifting mechanism superior;

The fixed hanging length test assembly includes a platform support plate jacking mechanism and a test probe mechanism, and the platform support plate jacking mechanism is arranged under the smooth feeding platform through a fixed support frame a; the smooth feeding platform is used to place the tested Polymer, the test probe mechanism is arranged below the jacking mechanism of the platform support plate.

As an option, the feeding assembly includes a screw drive mechanism and a press-down mechanism, and the press-down mechanism drives the compression bar through the air pressure transmission of the cylinder a to realize the compaction of the polymer to be tested; the screw drive mechanism passes the wire The rod slider b drives the pressing mechanism to move to realize the placement of the polymer to be tested.

As an option, the frame includes an upper chassis, a lower chassis and a fixed support frame, the upper chassis includes an upper chassis a and an upper chassis b, and the lower chassis includes a lower chassis a and a lower chassis Frame b, the upper chassis is fixed with the lower chassis through a fixed support frame.

As an option, the screw drive mechanism includes a motor a, a coupling b, a guide rod, a screw b, a screw nut and a screw slider b, and the screw b and the guide rod are arranged horizontally, The screw slider b is sleeved on the screw b and the guide rod, the screw slider b is slidably connected with the guide rod, the screw nut is installed at both ends of the screw slider b, and the motor a Placed on the frame, its output end is connected to one end of the screw rod b through the coupling b, the pressing mechanism is installed on the screw rod slider b; the motor a drives the rotation of the screw rod b, thereby driving the The pressing mechanism moves, and the guide rod shares the load.

As an option, the press-down mechanism is located above the polymer to be tested, and the press-down mechanism includes a cylinder a, a fixed frame b, a compression bar, a connecting column, and a cylinder connecting plate, and the connecting plate of the cylinder slides with the screw mandrel through the connecting column. The block b is connected, the cylinder a is installed on the fixed frame b, and its output end is connected with the compression bar; the movement of the cylinder a drives the compression bar to move up and down.

As an option, the smooth feeding platform is arranged above the upper floor frame b through a fixed support frame, and the front and rear sides of the smooth feeding platform are provided with baffles.

As an option, the lifting mechanism includes a motor b, a bearing a, a shaft coupling a, a screw rod a, a screw rod slider a, a movable groove, a transmission plate, a connecting piece, an upper working platform, and the motor b is installed on the lower On the bottom frame a, its output end is connected to one end of the screw rod a through a coupling a, the bearing a and the movable groove are also installed on the bottom frame a, the transmission plate is connected through a connecting piece, and its movable end The upper working platform is installed on the transmission plate through the screw slider a connected to the screw a; the motor b drives the screw a to move left and right through the coupling a, thereby driving the movable end of the transmission plate to move Move left and right in the groove, and then drive the upper working platform to move up and down; the infrared detector is connected to the upper plane of the upper working platform of the lifting mechanism through threads.

As an option, the platform support plate jacking mechanism includes a cylinder b, a platform support plate, a hinge structure, a fixed frame a, a pin, a moving connecting rod, and a connecting cylinder rod, and the cylinder b is fixed on the smooth feeding platform Below, the platform support plate is fixed on the smooth feeding platform through a hinge structure, the fixed frame a is installed under the platform support plate, the fixed frame a is connected with the moving connecting rod through a pin, and fixed on On the support plate of the platform, the moving connecting rod is connected to the cylinder b through the connecting rod of the cylinder.

As an option, the test probe mechanism includes a telescopic motor, a motor base, an electric push rod, a fixing screw, and a test probe, and the telescopic motor is fixed on the upper plane of the lower chassis b through the motor base, and the test probe It is fixed on the output end of the telescopic motor by fixing screws; the telescopic movement of the electric push rod on the telescopic motor drives the movement of the test probe.

Another technical solution of the present invention is to provide a method for testing polymer stiffness and drape bending resistance in the following steps, based on the above-mentioned polymer stiffness and drape bending resistance testing device, comprising the following steps:

Put the polymer to be tested flat on the smooth feeding platform, and the two opposite sides of the polymer to be tested are respectively pressed and fixed by the two pressing bars of the pressing mechanism, and the feeding assembly is used to drive the material to be tested by the screw drive mechanism. The polymer moves forward in a flat state and is sent to the test platform;

The first stage: the fixed hanging height test component raises the infrared detector from the initial state to the set position through the screw drive and the connecting rod drive, and uses the infrared detector to detect the hanging length of the polymer to be tested due to gravity and its own stiffness. Numerical value, obtain the stiffness characteristic of described polymkeric substance to be tested;

The second stage: the fixed overhang height test component and the feeding component are reset, the polymer is replaced on the feeding platform and fixed by the pressing mechanism, and the fixed overhang length test component drives the platform support plate through pneumatic transmission and connecting rod transmission. Hold it up until it is flush with the smooth feeding platform, and move the test probe to the set position through pneumatic transmission and connecting rod transmission. After the test probe is quickly retracted through the platform support plate, the pressure, induction Time and drape state, obtain the flexural performance of described polymkeric substance to be tested;

The third stage: the fixed suspension length test component and the feeding component are reset.

Using the above structure and method, the present invention has the following advantages compared with the prior art: the feeding component can automatically feed the polymer sample to be tested to the test platform, and achieve no stretching, twisting, stacking and wrinkling, and no influence on the test Process results; it can quickly and conveniently carry out the test transformation of polymer stiffness and drape bending resistance under the two modes of fixed overhang height and fixed overhang length, and realize multi-dimensional detection under different variables; in the fixed overhang height test mode, through lifting The mechanism drives the infrared detector up and down to realize the setting of different hanging fixed heights; in the fixed hanging length test mode, it can keep the polymer to be tested from the smooth feeding platform to a fixed length without affecting the subsequent test; obtain the polymer in the natural hanging The relationship between the drape length, force, and time under the state, realizes the comprehensive test of polymer stiffness and drape bending resistance, and is used to evaluate the polymer stiffness and drape bending resistance. The invention can quickly and accurately test the rigidity of the polymer and the bending resistance of the suspension under the two modes of fixed suspension height and fixed suspension length.

Description of drawings

Fig. 1 is the front view of the test device for polymer stiffness and drape bending resistance of the present invention.

Fig. 2 is a left view of the test device for polymer stiffness and drape bending resistance of the present invention.

Fig. 3 is a structural schematic diagram of the platform support plate.

Fig. 4 is a schematic diagram of the structure of the test probe.

In the figure: bearing a1, screw rod a2, screw rod slider a3, movable groove 4, coupling a5, connector 6, transmission plate 7, upper working platform 8, infrared detector 9, platform support plate 10, fixing screws 11. Test probe 12, fixed frame a13, pin 14, hinge structure 15, moving connecting rod 16, connecting cylinder rod 17, bearing b18, screw rod b19, guide rod 20, cylinder connecting plate 21, screw nut 22, connecting column 23. Screw slider b24, cylinder a25, fixed frame b26, coupling b27, motor a28, pressing bar 29, upper floor frame a30, baffle plate 31, smooth feeding platform 32, cylinder b33, fixed support frame 34, upper Base frame b35, lower base frame b36, telescopic motor 37, motor seat 38, electric push rod 39, motor b40, lower base frame a41, fixing bolt 42.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, for the sake of illustration, the drawings of the present invention are not completely drawn according to the actual scale, and are described here.

As shown in Fig. 1, 2, polymer stiffness of the present invention and suspension bending performance testing device comprise feeding assembly, fixed suspension height testing assembly, fixed suspension length testing assembly and frame, and frame consists of upper chassis, lower Underframe and fixed support frame 34 are made up of, and upper underframe comprises upper base frame a30 and upper base frame b35, and lower base frame comprises lower base frame a41 and lower base frame b36, and upper base frame a30 is composed of five horizontally placed fixed support frames 34, the lower floor frame a41 is composed of six horizontally placed fixed support frames 34, the upper floor frame a30 and the lower floor frame a41 are fixed by six vertically placed fixed support frames 34, the upper floor frame b35 and the lower floor frame b36 are respectively composed of Composed of four horizontally placed fixed support frames 34, the upper floor frame b35 and the lower floor frame b36 are fixed on the lower floor frame a41 through four vertically placed fixed support frames 34, and the feeding assembly includes a screw drive mechanism and a pressing mechanism , the screw transmission mechanism is composed of motor a28, coupling b27, guide rod 20, screw b19, screw nut 22 and screw slider b24, the motor a28 is horizontally arranged on the left side of the upper plane of the upper chassis a30, the motor The right side of a28 is provided with a shaft coupling b27, which is fixed on the upper plane of the upper chassis a30, and the right side of the coupling b27 is provided with a horizontally parallel guide rod 20 and a screw b19, and is connected with the upper chassis a30. The bearing b18 on the right side of the plane is connected, and the screw nuts 22 are arranged on both sides of the screw slider b24, and are arranged on the screw b19. Fixing frame b26, pressing bar 29, connecting column 23, cylinder connecting plate 21, cylinder connecting plate 21 is fixed on the screw rod slider b24 through connecting column 23, six cylinders a25 are set on the cylinder connecting plate through twelve fixing frames b26 21. The front and rear sides of the upper plane are fixed by bolts. The output end of the cylinder a25 is provided with two pressing bars 29. A smooth feeding platform 32 is arranged directly below the pressing bars 29. The baffle plates 31 on both sides are arranged on the smooth feeding platform 32 before and after the upper plane. On both sides, the fixed hanging height test assembly includes a lifting mechanism and an infrared detector 9. The lifting mechanism includes a motor b40, a bearing a1, a coupling a5, a screw a2, a screw slider a3, a movable groove 4, a transmission plate 7, and a connection Part 6, the upper working platform 8, the motor b40 is horizontally arranged in the middle of the upper plane of the lower floor frame a41, the right side of the motor b40 is provided with a coupling a5, the bearing a1 is arranged at the right end of the upper plane of the lower floor frame a41, and the bearing a1 is connected with the coupling Screw rod a2 is arranged between the shafts a5, movable grooves 4 are arranged on the front and rear sides of the screw rod a2, the screw rod slider a3 is arranged on the screw rod a2 and in the movable groove 4, and the front and rear sides of the screw rod slider a3 Each is provided with two transmission plates 7, and the front and rear two transmission plates 7 on the same side are rotatably connected by connecting pieces 6, and the two transmission plates 7 on the right are respectively rotatably connected with the movable groove by two connecting pieces 6, and the two on the left The root drive plate 7 is placed on the screw rod slider a3, and the upper working platform 8 is connected with the four drive plates 7 by bolts, and the upper plane of the upper working platform 8 is provided with an infrared detector 9, fixed The fixed hanging length test assembly includes cylinder b33, platform support plate 10, hinge structure 15, fixed frame a13, pin 14, moving connecting rod 16, connecting cylinder rod 17, telescopic motor 37, motor base 38, electric push rod 39, fixing screws 11. The test probe 12, the platform support plate 10 is connected with the smooth feeding platform 32 through the hinge structure 15, the fixed frame a13 is arranged under the platform support plate 10, the movable connecting rod 16 is connected with the fixed frame a13 through the pin 14, and the movable connecting rod 16 The connecting cylinder rod 17 is arranged on the left side, the cylinder b33 is arranged between the smooth feeding platform 32 and the upper base frame b35, and is connected with the connecting cylinder rod 17, and the telescopic motor 37 is arranged on the upper base frame b35 and the lower base plate through the motor base 38 Between the frame b36 and connected with the electric push rod 39 on the right side, the test probe 12 is vertically arranged on the right end of the electric push rod 39 through the fixing screw 11.

As shown in 3, the platform support plate 10 is connected with the smooth feeding platform 32 through the hinge structure 15, the fixed frame a13 is arranged under the platform support plate 10, the cylinder b33 is arranged under the smooth feeding platform 32 through the fixing bolt 42, and the right side of the cylinder b33 is provided There is connecting cylinder rod 17, and moving connecting rod 16 is arranged between cylinder connecting rod 17 and fixed mount a13 by pin 14.

As shown in Figures 1 and 4, the telescopic motor 37 is horizontally arranged on the lower floor frame b36 through the motor base 38, the electric push rod 39 is arranged on the right side of the telescopic motor 37, and the test probe 12 is arranged on the right end of the electric push rod 39 through the fixing screw 11 .

It should be noted that the front and rear opposite sides of the polymer to be tested are sent to the test platform after being compressed by the pressing bar and the smooth feeding platform, which can ensure that the polymer to be tested has no stretching, distortion, stacking and wrinkles, and does not affect the test process results. It can test the stiffness and drape bending resistance.

A method for testing polymer stiffness and drape bending resistance, based on the above-mentioned polymer stiffness and drape bending resistance testing device, comprising the following steps:

Put the polymer to be tested flat on the smooth feeding platform, and the two opposite sides of the polymer to be tested are respectively pressed and fixed by the two pressing bars of the pressing mechanism, and the feeding assembly drives the polymer to the surface through the screw drive mechanism. Move forward in a flat state and send it into the test platform;

The first stage: the fixed hanging height test component raises the infrared detector from the initial state to the set position through the screw drive and the connecting rod drive, and uses the infrared detector to detect the hanging length of the polymer to be tested due to gravity and its own stiffness. Numerical value, obtain the stiffness characteristic of described polymkeric substance to be tested;

The second stage: the fixed overhang height test component and the feeding component are reset, the polymer is replaced on the feeding platform and fixed by the pressing mechanism, and the fixed overhang length test component drives the platform support plate through pneumatic transmission and connecting rod transmission. Hold it up until it is flush with the smooth feeding platform, and move the test probe to the set position through pneumatic transmission and connecting rod transmission. After the test probe is quickly retracted through the platform support plate, the pressure, induction Time and drape state, obtain the flexural performance of described polymkeric substance to be tested;

The third stage: the fixed suspension length test component and the feeding component are reset.

The specific test method is: check the instrument before starting the test, then turn on the power, place the polymer sample to be tested flat on the smooth feeding platform 32, start the cylinder a25, make the pressing bar 29 compress the polymer sample, and start the motor at the same time a28 and motor b40, the setting time is 3 minutes, the motor b40 controls the screw a2 to rotate at a certain speed to drive the screw slider a3 to move, and the movement of the screw slider a3 will drive the upper working platform 8 and the infrared detector through the transmission plate 7 9 moves up and down to the set test height position, the motor a28 controls the screw rod b19 to drive the screw rod slider b24 to move at a certain speed, the pressing bar 29 drives the polymer sample to be tested to enter the test platform, and the infrared detector 9 collects the polymer sample due to gravity Complete the polymer stiffness and bending resistance test under the fixed hanging height mode according to the time and the value of the hanging length of its own stiffness to hang naturally to the set height; reset the feeding component and the lifting mechanism, and re-level the polymer sample to be tested. Put it on the smooth feeding platform 32, start the cylinder a25, make the pressing bar 29 compress the polymer sample, start the cylinder b33 and the telescopic motor 37, set the time to 3min, the cylinder b33 drives the connecting rod 16 to rotate by connecting the cylinder rod 17, The rotation of the moving connecting rod 16 drives the fixed frame a13 to prop up the platform support plate 10, the telescopic motor 37 drives the electric push rod 39 to move, the electric push rod 39 drives the test probe 12 to move to the set test length position, and the motor a28 controls the screw rod b19 Drive the screw slider b24 to move at a certain speed, and the pressing bar 29 drives the polymer sample to be tested to enter the test platform, and then drives the cylinder b33 to connect the cylinder rod 17 and the moving connecting rod 16 to quickly retract the platform support plate 10, so that the polymer sample to be tested The material sample naturally hangs down on the test probe 12 below, and the test probe will collect the force and sensing time, etc., to complete the polymer stiffness and suspension bending performance tests under the fixed suspension length mode, so that the feeding components, fixed suspension length The test components are reset, so that multiple tests can obtain multiple sets of parameters of polymer sample stiffness and drape bending resistance, and finally perform data calculation and analysis to summarize the experimental results.

The test principle of this device is: the polymers of different materials have different stiffnesses, and the hanging states are different when they are suspended under the influence of gravity. By controlling variables, the polymers of the same size and different materials hang naturally at a fixed hanging height. Changes, the drape state is represented by indicators such as length, force and time, and the test value of the stiffness is obtained by digitizing it. When the polymers of different materials are fixed in the drape length, the drape process is different. By collecting the polymer drape force and Induction time, etc., can realize the comprehensive test of the bending resistance characteristics of polymer overhangs under the fixed overhang length mode.

The above is only an illustration of the embodiments of the present invention, but should not be construed as a limitation on the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to vary. In a word, all kinds of changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims (10)

1. a kind of polymer rigidity and drape bending resistance testing device, it is characterized in that: comprise feeding assembly, fixed overhang height test assembly, fixed overhang length test assembly and frame, described feed assembly, fixed overhang height test assembly and The fixed overhang length test components are all installed on the frame, the fixed overhang height test component and the fixed overhang length test component are installed oppositely, and are all located below the feeding component, and the fixed overhang test component is arranged on the fixed overhang length test component. Right output; The fixed hanging height test assembly includes a lifting mechanism and an infrared detector (9), the lifting mechanism is installed on the frame, and is located below the feeding assembly, and the infrared detector (9) is set on the On the working platform on the lifting mechanism; The fixed hanging length test assembly includes a platform support plate jacking mechanism and a test probe mechanism, and the platform support plate jacking mechanism is arranged under the smooth feeding platform (32) through a fixed support frame (34); the smooth feeding platform (32) For placing the polymer to be tested, the test probe mechanism is arranged under the platform support plate jacking mechanism. 2. The polymer stiffness and drape bending resistance test device according to claim 1, characterized in that: the feeding assembly includes a screw drive mechanism and a pressing mechanism, and the pressing mechanism passes through the cylinder a (25 ) Pneumatic transmission drives the compression bar (29) to realize the compaction of the polymer to be tested; the screw drive mechanism drives the pressing mechanism to move through the screw slider b (24) to realize the placement of the polymer to be tested. 3. The polymer stiffness and drape bending resistance test device according to claim 1, characterized in that: the frame includes an upper chassis, a lower chassis and a fixed support frame (34), and the upper chassis Including upper base frame a (30) and upper base frame b (35), the lower base frame includes lower base frame a (41) and lower base frame b (36), and the upper base frame is fixed by a support frame (34 ) are fixed with the lower chassis. 4. The testing device for polymer stiffness and drape bending resistance according to claim 2, characterized in that: the screw drive mechanism includes a motor a (28), a coupling b (27), a guide rod (20 ), screw b (19), screw nut (22) and screw slider b (24), the screw b (19) and guide rod (20) are set horizontally, and the screw slider b (24) is sleeved on the screw rod b (19) and the guide rod (20), the screw slider b (24) is slidingly connected with the guide rod (20), and the screw nut (22) is installed on the screw rod The two ends of the slider b (24), the motor a (28) is placed on the frame, and its output end is connected to one end of the screw rod b (19) through the coupling b (27), and the pressing mechanism Installed on the screw slider b (24); the motor a (28) drives the rotation of the screw b (19), thereby driving the pressing mechanism to move. 5. The testing device for polymer stiffness and drape bending resistance according to claim 2 or 4, characterized in that: the press-down mechanism is located above the polymer to be tested, and the press-down mechanism includes cylinder a (25), Fixing frame b (26), pressing bar (29), connecting column (23), cylinder connecting plate (21), the cylinder connecting plate (21) is connected with screw rod slider b (24) through connecting column (23) , and fixed below the screw slider b (24) through the fixing bracket b (26), the cylinder a (25) is installed on the fixing bracket b (26), and its output end is connected with the pressing bar (29); The movement of the cylinder a (25) drives the pressing bar (29) to move up and down. 6. The testing device for polymer stiffness and drape bending resistance according to claim 1, characterized in that: the smooth feeding platform (32) is set on the upper floor frame b (35) through a fixed support frame (34) Above, the front and rear sides of the smooth feeding platform (32) are provided with baffles (31). 7. The testing device for polymer stiffness and drape bending resistance according to claim 1, characterized in that: the lifting mechanism includes a motor b (40), a bearing a (1), and a coupling a (5) , screw a (2), screw slider a (3), movable slot (4), transmission plate (7), connector (6), upper working platform (8), the motor b (40) is installed On the lower floor frame a (41), its output end is connected to one end of the screw rod a (2) through the coupling a (5), and the bearing a (1) and the movable groove (4) are also installed on the lower floor frame a (41), the transmission plate (7) is connected through a connecting piece (6), and its movable end is connected to the screw a (2) through the screw slider a (3), and the upper working platform (8 ) is installed on the transmission plate (7); the motor b (40) drives the screw a (2) to move left and right through the coupling a (5), thereby driving the movable end of the transmission plate (7) in the movable groove (4) moves left and right, and then drives the upper working platform (8) to move up and down; the infrared detector (9) is screwed to the upper plane of the upper working platform (8) of the lifting mechanism. 8. The testing device for polymer stiffness and drape bending resistance according to claim 1 or 4, characterized in that: the platform support plate jacking mechanism includes cylinder b (33), platform support plate (10), Hinge structure (15), fixed frame a (13), pin (14), moving connecting rod (16), connecting cylinder rod (17), and the cylinder b (33) is fixed on the smooth feeding platform (32) Below, the platform support plate (10) is fixed on the smooth feeding platform (32) through a hinge structure (15), the fixing frame a (13) is installed under the platform support plate (10), the The fixed frame a (13) is connected with the moving connecting rod (16) through the pin (14), and is fixed on the platform support plate (10), and the moving connecting rod (16) is connected to the cylinder rod (17) Connect with cylinder b (33). 9. The polymer stiffness and drape bending resistance test device according to claim 8, characterized in that: the test probe mechanism includes a telescopic motor (37), a motor base (38), an electric push rod (39) , fixing screw (11), test probe (12), the telescopic motor (37) is fixed on the upper plane of the lower floor frame b (36) through the motor base (38), and the test probe (12) is fixed by The screw (11) is fixed on the output end of the telescopic motor (37); the telescopic movement of the electric push rod (39) on the telescopic motor (37) drives the movement of the test probe (12). 10. A method for testing polymer stiffness and drape bending resistance, based on the polymer stiffness and drape bending resistance testing device according to claim 1, characterized in that: comprising the following steps: Put the polymer to be tested flat on the smooth feeding platform, and the two opposite sides of the polymer to be tested are respectively pressed and fixed by the two pressing bars of the pressing mechanism, and the feeding assembly is used to drive the material to be tested by the screw drive mechanism. The polymer moves forward in a flat state and is sent to the test platform; The first stage: the fixed hanging height test component raises the infrared detector from the initial state to the set position through the screw drive and the connecting rod drive, and uses the infrared detector to detect the hanging length of the polymer to be tested due to gravity and its own stiffness. Numerical value, obtain the stiffness characteristic of described polymkeric substance to be tested; The second stage: the fixed overhang height test component and the feeding component are reset, the polymer is replaced on the feeding platform and fixed by the pressing mechanism, and the fixed overhang length test component drives the platform support plate through pneumatic transmission and connecting rod transmission. Hold it up until it is flush with the smooth feeding platform, and move the test probe to the set position through pneumatic transmission and connecting rod transmission. After the test probe is quickly retracted through the platform support plate, the pressure, induction Time and drape state, obtain the flexural performance of described polymkeric substance to be tested; The third stage: the fixed suspension length test component and the feeding component are reset.