Elastic elongation testing device for spinning

Abstract

The utility model relates to an elastic elongation testing device for spinning, which comprises a stand column, an upper clamp holder, a tension scale and a lower clamp holder, the stand column is provided with the fixedly arranged upper clamp holder and the liftable lower clamp holder, the lower clamp holder is connected with the tension scale, the tension scale and the lower clamp holder synchronously ascend and descend, and the tension scale is connected with the lower clamp holder. A sampling length of 400-600mm is arranged between the lower clamp holder and the upper clamp holder at an initial position, an elastic limiting sensor corresponding to the lower clamp holder is arranged on the upright post, the elastic limiting sensor is arranged below the initial position of the lower clamp holder, a digital display height gauge is arranged at the bottom of the upright post, and a ruler disc of the digital display height gauge is connected with a clamping jaw. According to the utility model, the defect that the traditional single-yarn strength tester can not test the elastic elongation and the elastic elongation is overcome, one machine has two purposes, the conventional detection of the traditional strength tester can be simultaneously carried out, the elastic elongation test can also be carried out, the investment of equipment and instruments is saved, and effective data which is more helpful for the production of the previous and later weaving process can also be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of textile detection equipment, and particularly relates to an elastic elongation test device for textiles. Background Art

[0002] The electronic single yarn strength tester is used for testing the breaking strength, elongation at break, breaking elongation, coefficient of variation of breaking strength and other related indexes of single yarns and fiber pure-spun or blended yarns of various cotton, wool, linen, silk, chemical fiber and core-spun yarns. It can also be applied to the testing of related indexes of paper, medical rubber backing yarns, automotive interior parts, artificial turf, etc. The electronic single yarn strength tester tests related indexes such as breaking strength, elongation at break and coefficient of variation of breaking strength, but there are no related indexes and methods for testing the elastic elongation and elastic elongation rate of textile yarns and chemical fiber filaments, and it cannot more comprehensively reflect the physical properties of textile yarns and chemical fiber filaments under alternating stresses during subsequent processing.

[0003] Due to the lack of related physical indexes such as elastic elongation and elastic elongation rate of textile yarns and chemical fiber filaments, it is impossible to set the corresponding warping tension and weaving tension according to the test data of the elastic elongation and elastic elongation rate of yarns and chemical fiber filaments during warping and weaving, resulting in a large deviation in the tightness between yarns, causing defective warp beams such as skewed yarns and bread-shaped shafts, and prone to the generation of unqualified products such as loose hanging warps, stripe marks, broken warps and jumping yarns during subsequent weaving, as well as an increase in production costs. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above deficiencies, and provides an elastic elongation test device for textiles, which solves the defect that the traditional single yarn strength tester cannot test elastic elongation and elastic elongation rate. It has two functions in one machine, can not only carry out the conventional detection of the traditional strength tester, but also carry out the test of elastic elongation, saving the investment in equipment and instruments, and obtaining effective data that is more helpful for the production of front and back weaving processes.

[0005] The purpose of the utility model is realized as follows:

[0006] An elastic elongation test device for textiles, comprising a column, an upper gripper, a tension scale and a lower gripper. The upper gripper is fixedly arranged on the column, and the lower gripper is liftable. The lower gripper is connected to the tension scale, and the tension scale and the lower gripper are lifted and lowered synchronously. A spacing of 400 - 600 mm is set between the lower gripper and the upper gripper at the initial position, and this spacing is the sampling length of the specimen to be tested. An elastic limit sensor is provided on the column corresponding to the lower gripper, and the elastic limit sensor is arranged below the initial position of the lower gripper. A digital display height gauge is provided at the bottom of the column. The scale rod of the digital display height gauge is fixed on the column, and the scale disk of the digital display height gauge is connected to the jaw.

[0007] Preferably, the height of the elastic limit sensor is adjustable, and the elastic limit sensor is 10 - 200 mm away from the initial position of the lower gripper.

[0008] Preferably, the column is fixed on the base, and a display screen, a test button and a function selection switch are further arranged on the base.

[0009] Preferably, a yarn inserting rod is further arranged on the base, and the sample to be tested is inserted on the yarn inserting rod.

[0010] Preferably, the elastic limit sensor, the digital display height gauge and the display screen are all electrically connected to the controller.

[0011] The beneficial effects of the utility model are as follows:

[0012] The elastic elongation and elastic elongation rate of the incoming materials of yarns and chemical fiber filaments are tested. According to the data of the tested elastic elongation and elastic elongation rate during warping, the process parameters such as the warping tension and weaving tension of the yarns and chemical fiber filaments with different elastic elongations and elastic elongation rates are appropriately adjusted, so that the fluctuation of the warp tension during the unwinding and weaving of the warp beam is within a reasonable range, ensuring the weaving efficiency and the first-class product rate of the woven fabric, and enhancing the market competitiveness of the enterprise. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the utility model.

[0014] Wherein: column 1; upper gripper 2; tension scale 3; lower gripper 4; elastic limit sensor 5; digital display height gauge 6; jaw 7; base 8; display screen 9; test button 10; function selection switch 11; yarn inserting rod 12; sample to be tested 13; yarn guide hook 14. Detailed Embodiment

[0015] See Figure 1 , the utility model relates to a textile elastic elongation test device, which includes a column 1, an upper gripper 2, a tension scale 3 and a lower gripper 4. A fixed upper gripper 2 and a liftable lower gripper 4 are arranged on the column 1. The lower gripper 4 is connected to the tension scale 3, and the tension scale 3 and the lower gripper 4 are lifted and lowered synchronously. A spacing of 400 - 600 mm is set between the lower gripper 4 at the initial position and the upper gripper 2. This spacing is the sampling length of the sample to be tested. There is a scale on the column 1 to facilitate determining the sampling length. An elastic limit sensor 5 is arranged on the column 1 corresponding to the lower gripper 4. The elastic limit sensor 5 is arranged below the initial position of the lower gripper 4 and is 10 - 200 mm away from the initial position of the lower gripper 4. A digital display height gauge 6 is arranged at the bottom of the column 1. The scale rod of the digital display height gauge 6 is fixed on the column 1, and the scale disk of the digital display height gauge 6 is connected to the jaw 7. The jaw 7 is used to grip the sample to be tested, and the jaw 7 moves up and down along the scale rod of the digital display height gauge 6 with the scale disk of the digital display height gauge 6.

[0016] The elastic limit sensor 5 is height-adjustable. The vertical column 1 is provided with a vertical sliding groove, and the elastic limit sensor 5 is tightened against the bottom of the vertical sliding groove by a tightening screw. The distance between the elastic limit sensor 5 and the initial position of the lower gripper 4 is the elastic stretching length of the specimen to be tested. Within the elastic stretching length range, the specimen to be tested can be elastically reset by itself, and the position of the elastic limit sensor 5 can be appropriately adjusted according to the material type and linear density specification of the specimen to be tested, so as to avoid inaccurate test data caused by insufficient stretching or test failure caused by breaking the specimen.

[0017] The vertical column 1 is fixed on the base 8. The base 8 is also provided with a display screen 9, a test button 10 and a function selection switch 11. The function selection switch 11 has two gears: normal test and elastic elongation, which are used to select whether to perform a normal test or a test of elastic elongation.

[0018] The base 8 is also provided with a yarn inserting rod 12, and the specimen to be tested is inserted on the yarn inserting rod 12 to facilitate test sampling.

[0019] The elastic limit sensor 5, the digital display height gauge 6 and the display screen 9 are all electrically connected to the controller.

[0020] The operation method includes the following steps:

[0021] Step 1. Specimen preparation: Determine the number of specimens and condition the specimens.

[0022] Sampling quantity: When the incoming quantity ≤ 2 tons, the sampling quantity is 6 specimens; when the incoming quantity > 2 tons, the sampling quantity is 10 specimens (the sampling quantity can be appropriately increased according to production needs and test conditions).

[0023] Specimen conditioning: Place the specimens in a laboratory under constant standard atmospheric pressure conditions for conditioning until they are in equilibrium with the temperature and humidity in the surrounding air. The standard temperature of the laboratory is: 20°C ± 2, the relative humidity is: 65% ± 2, and the conditioning time is: 24 - 48 hours. It is required that all outer packaging materials of the specimens be removed, the specimens be placed vertically, the surfaces be exposed to the laboratory environment, and the specimens must be arranged so that there is enough space between the specimens to allow free air flow, so as to achieve the same moisture regain rate inside and outside the specimens and make the test data more accurate.

[0024] When testing textile yarns and chemical fiber filaments with problems found in production, they should also be conditioned in the laboratory under standard temperature and humidity conditions for 24 - 48 hours to make the test data stable, reliable and accurate.

[0025] Step 2.

[0026] Set the initial position of the lower gripper at 400 mm from the upper gripper, set the elastic limit sensor 5 at 50 mm from the initial position of the lower gripper, confirm the sampling length of the test sample to be 400 mm, and the elastic stretching length to be 50 mm;

[0027] Step 3: Place the function selection switch in the gear position of elastic detection.

[0028] Place the test sample 13 (textile yarn or chemical fiber filament sample) after the temperature and humidity meet the requirements on the yarn inserting rod. Pass the test sample through the yarn guide hook 14, through the jaws of the upper gripper, lower gripper, and digital display height gauge. Clamp the upper gripper (the force of both the upper and lower grippers should be appropriate) and prevent the sample from slipping and breaking at the jaws when stretched. Clamp the jaws of the digital display height gauge (weighing about 10 - 20 grams), which is equivalent to the pre-tension applied to the sample (to prevent measurement deviation caused by twist contraction and distortion of the sample). Let the sample hang naturally under the action of the gravity of the jaws. Clamp the lower gripper, zero the digital display height gauge, and press the test button. The lower gripper automatically starts to stretch downward according to the set program. When the lower gripper is pulled down to the set position of the elastic stretching limit sensor (i.e., the elastic stretching length), it automatically stops pulling down by the instruction of the host computer program. Release the lower gripper. The sample retracts and rises due to its own elasticity, driving the jaws and the chuck of the digital display height gauge to rise together until it stops. At this time, read the measurement data of the digital display height gauge, which is the elastic elongation △L of the sample. From the formula: δ = △L / L, where δ: elastic elongation rate, △L: elastic elongation (mm), L: sample length (mm), the elastic elongation rate (%) can be calculated from the above formula. When all the samples are tested as required, the display screen will show all the test data and print out the test report through the connected printer. The test data includes the average elastic elongation length (mm), elastic elongation rate (%), and elastic elongation coefficient of variation (CV%) to comprehensively reflect the elastic elongation of this batch of samples, and the elastic elongation coefficient of variation (CV%) represents the internal non-uniformity difference of the elastic elongation of this batch of samples (the smaller this data is, the better, indicating that the elastic elongation difference of this batch of materials is small, which is beneficial to the production and processing of the subsequent processes). The elastic elongation coefficient of variation is automatically generated by the host computer according to: CV% = 2n1(L - L1) / nL (Zommer formula) after calculating the data after the test is completed, where: n1: the number of data below the average, L: the average of the test data, L1: the average of the data below the average, n: the total number of tests.

[0029] During the test, according to the different types of samples, the specific setting parameters of this device are shown in the following table:

[0030] Reference Table (I) of Parameter Settings for Elastic Elongation Test Device

[0031]

[0032] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by means of equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. An elastic elongation test device for textiles, comprising a vertical column, an upper gripper, a tension scale and a lower gripper. The upper gripper is fixedly arranged on the vertical column, and the lower gripper is liftable. The lower gripper is connected to the tension scale, and the tension scale is lifted and lowered synchronously with the lower gripper. It is characterized in that: A spacing of 400 - 600 mm is set between the lower gripper and the upper gripper at the initial position, and this spacing is the sampling length of the specimen to be tested. An elastic limit sensor is provided on the column corresponding to the lower gripper, and the elastic limit sensor is arranged below the initial position of the lower gripper. A digital height gauge is provided at the bottom of the column. The scale rod of the digital height gauge is fixed on the column, and the scale disk of the digital height gauge is connected to the jaw.

2. The elastic elongation testing device for textile according to claim 1, wherein: The height of the elastic limit sensor is adjustable, and the elastic limit sensor is 10 - 200 mm away from the initial position of the lower gripper.

3. The elastic elongation test device for textile according to claim 1, wherein: The column is fixed on the base, and a display screen, a test button and a function selection switch are also provided on the base.

4. A textile elastic elongation test device according to claim 1, characterized in that: A yarn inserting rod is also provided on the base, and the specimen to be tested is inserted on the yarn inserting rod.

5. A textile elastic elongation testing device according to claim 3, characterized in that: The elastic limit sensor, the digital height gauge and the display screen are all electrically connected to the controller.

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