Textile light fastness testing machine

Abstract

This invention discloses a lightfastness testing machine for textiles, relating to the field of lightfastness testing technology for textiles. The invention includes a machine body, with a xenon arc lamp assembly mounted on the inner top and a rotating mounting disc mounted on the inner bottom. The xenon arc lamp assembly is located at the center of the mounting disc, which is driven by a servo motor. A brake is installed at the bottom of the mounting disc, and several testing components are mounted in a ring around its outer side. This invention adjusts the centrifugal force of the counterweight by controlling the rotation speed of the mounting disc. The centrifugal force controls the swing of the testing pendulum. In a low-speed stable state, the fabric is subjected to conventional static irradiation. At medium speed, folding dynamics are simulated; at high speed, friction dynamics are simulated. The brake quickly stops the mounting disc, and the inertial force drives the testing pendulum to swing outward, applying tension to the fabric and simulating stretching dynamics. Combining static and dynamic data provides more accurate test results.

Description

Technical Field

[0001] This invention relates to the field of lightfastness testing technology for textiles, and specifically to a lightfastness testing machine for textiles. Background Technology

[0002] Textiles, especially clothing, home textiles, automotive interiors, and outdoor textiles, are inevitably exposed to sunlight throughout their life cycle. Ultraviolet radiation from sunlight is a major factor causing photo-oxidative degradation of dyes and some fibers in textiles, leading to color fading or shift (i.e., deterioration of lightfastness). To overcome the limitations of natural exposure, the industry widely adopts accelerated lightfastness testing in laboratories, with the core equipment being a lightfastness testing machine.

[0003] The current mainstream equipment works by using a high-intensity xenon arc lamp as a light source, along with a series of optical filters, to simulate the solar spectrum (especially the ultraviolet and visible light portions). Within a sealed test chamber, temperature, humidity, and any potential spraying conditions are precisely controlled to accelerate the exposure of textile samples to sunlight. The lightfastness rating is then assessed by comparing the color changes of the exposed and unexposed portions of the sample (usually using a partial masking method), or by comparing the degree of fading with that of a standard blue wool fabric with a known lightfastness rating after simultaneous exposure.

[0004] A solar climate color fastness tester is disclosed in a patent (publication number: CN206387703U), comprising an air supply chamber, a working chamber, and a water supply chamber arranged sequentially from top to bottom. The air supply chamber is equipped with a fan. The top surface of the working chamber has an upper through hole communicating with the air supply chamber. The working chamber is equipped with a turntable, and several test boxes are evenly distributed around the turntable. A rotation drive mechanism for driving the turntable to rotate is set below the turntable. The working chamber is also equipped with a xenon arc lamp located at the center of the turntable. The xenon arc lamp is mounted on a xenon arc lamp fixing ring, which is fixed to the top surface of the working chamber. The water supply chamber is equipped with a water tank, a water pump, and a water filter. Water in the water tank flows into the upper part of the working chamber through the water pump and the water filter via a water pipe. The bottom surface of the working chamber is equipped with a lower through hole, through which the water flowing into the working chamber circulates back to the water tank.

[0005] The patent and existing technologies have the following technical problems in practical use: Samples are usually fixed in a flat, static manner. The routine environmental parameters such as temperature, humidity and possible spraying are controlled in a closed test chamber to accelerate the exposure of textile samples to sunlight. This cannot simulate the effect of dynamic states such as folding, stretching and friction of clothing in use on lightfastness, and the test results are not accurate enough. Summary of the Invention

[0006] The purpose of this invention is to provide a lightfastness testing machine for textiles in order to solve the above problems.

[0007] To achieve the above objectives, the present invention specifically adopts the following technical solution: A lightfastness testing machine for textiles includes a machine body, a xenon arc lamp assembly installed on the inner top of the machine body, an installation turntable rotatably installed on the inner bottom of the machine body, the xenon arc lamp assembly being located at the center of the installation turntable, the installation turntable being driven by a servo motor, and a brake being provided at the bottom of the installation turntable, and several test components being installed in a ring on the outer side of the installation turntable. The test assembly includes a main board fixedly mounted on a mounting turntable. Test pendulums are hinged to the top and bottom of the main board. The two test pendulums can swing synchronously in opposite directions. A counterweight is provided on the side of the upper test pendulum away from the xenon arc lamp assembly. An inner block is fixedly mounted on the side of the main board close to the xenon arc lamp assembly. An inclined groove is provided on the top of the inner block. An inner clamping block is slidably connected inside the inclined groove. A top spring is provided between the inner clamping block and the inner wall of the inclined groove. The contact surface between the inner clamping block and the inner block is an inclined surface.

[0008] Furthermore, the initial position of the test pendulum is at an angle of 150° with the main board, the counterweight is on the same plane as the main board, the top of the main board has a pendulum opening, the counterweight can pass through the pendulum opening, the top of the inner clamping block has an inclined clamping surface, and the angle between the inclined clamping surface and the main board is 65-75°.

[0009] Furthermore, the inclined clamping surface is a frosted surface, and the friction between the frosted surface and the fabric is greater than the friction between the fabrics.

[0010] Furthermore, the test plate has a frosted surface two on the side near the xenon arc lamp assembly, and the friction between the frosted surface two and the fabric is greater than the friction between the fabrics.

[0011] Furthermore, a buffer pad is provided on the side of the inner block away from the xenon arc lamp assembly, and the buffer pad is correspondingly positioned with the swing opening.

[0012] Furthermore, a clamping groove is provided at the end of the test pendulum away from the motherboard, and a clamping plate is inserted into the groove. The clamping plate is installed on the test pendulum by locking bolts.

[0013] Furthermore, a sliding groove is provided on the outer side of the main board. The sliding groove is located on the high end of the inclined sliding groove. A connecting slider is slidably connected inside the sliding groove. The top and bottom of the connecting slider are hinged with connecting rods, which are hinged to the corresponding test pendulum.

[0014] Furthermore, the counterweight is fixedly mounted on the upper test pendulum plate by mounting rods and bolts.

[0015] Furthermore, three sets of brackets are provided on the outer side of the mounting turntable. The brackets have sliding openings inside. A lower clamping ring is fixedly installed on the inner side of the bracket. The lower clamping ring is polygonal in shape and has several lower slots through it. An upper clamping ring is provided on the inner side of the bracket. Several upper slots are through it. Three sets of sliding pillars are arranged in a ring on the outer side of the upper clamping ring. The sliding pillars pass through the sliding openings. A locking knob is threaded to the outer side of the sliding pillars. The locking knob is located on the outer side of the bracket. A clamping block is fixedly installed on the lower half of the motherboard on the side away from the xenon arc lamp assembly. The clamping block is T-shaped and can be inserted into the lower slot and the upper slot.

[0016] The beneficial effects of this invention are as follows: 1. This invention adjusts the centrifugal force of the counterweight by controlling the rotation speed of the installation turntable. The centrifugal force controls the swing of the test pendulum. In the low-speed stable state, the fabric is subjected to conventional static irradiation. In the medium-speed rotation, the test pendulum swings towards the inner clamping block, folding the fabric between the inner clamping plate and the test pendulum to simulate folding dynamics. In the high-speed rotation, the test pendulum pushes the inner clamping plate down along the inclined slide, causing the inner clamping plate to misalign with the test pendulum, resulting in friction between the folded fabric and simulating friction dynamics. Then, the installation turntable is quickly stopped by the brake, and the counterweight loses its centrifugal force. Under the action of gravity, the counterweight swings downward rapidly, using inertial force to drive the test pendulum to swing outward, applying tension to the fabric and simulating stretching dynamics. Combining static and dynamic data can provide more accurate test results.

[0017] 2. The present invention, through the setting of upper and lower clamping rings, can quickly achieve the clamping of multiple test components, resulting in high testing efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the lightfastness testing machine of the present invention; Figure 2 This is a schematic diagram of the door opening structure of the lightfastness testing machine of the present invention; Figure 3 This is a schematic diagram of the internal structure of the lightfastness testing machine of the present invention; Figure 4 This is a schematic diagram of the lower and upper clamping ring structures of the present invention; Figure 5 This is a schematic diagram of the test component structure of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the test component structure of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the exploded structure of the test component of this invention; Figure 8 This is a schematic diagram of the internal block structure of the present invention.

[0019] Reference numerals: 1. Body; 2. Xenon arc lamp assembly; 3. Mounting turntable; 31. Bracket; 32. Slide opening; 4. Lower clamping ring; 41. Lower slot; 5. Upper clamping ring; 51. Upper slot; 52. Sliding column; 53. Locking knob; 6. Test assembly; 61. Main board; 611. Insert clamping block; 612. Swing opening; 62. Test swing plate; 621. Clamping groove; 622. Clamping plate; 623. Locking bolt; 624. Frosted surface two; 63. Mounting rod; 64. Counterweight; 65. Inner block; 651. Inner clamping block; 652. Top spring; 653. Buffer pad; 654. Frosted surface one; 66. Connecting rod; 67. Connecting slider. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] Example 1, as Figures 1-8 As shown, a textile lightfastness testing machine includes a body 1, a xenon arc lamp assembly 2 installed on the inner top of the body 1, an installation turntable 3 rotatably installed on the inner bottom of the body 1, the xenon arc lamp assembly 2 being located at the center of the installation turntable 3, the installation turntable 3 being driven by a servo motor, and a brake being provided at the bottom of the installation turntable 3, and several test components 6 being installed in a ring on the outer side of the installation turntable 3. The test assembly 6 includes a main board 61 fixedly mounted on the mounting turntable 3. Test pendulums 62 are hinged to the top and bottom of the main board 61. The two test pendulums 62 can swing synchronously in opposite directions. A counterweight 64 is provided on the side of the upper test pendulum 62 away from the xenon arc lamp assembly 2. An inner block 65 is fixedly mounted on the side of the main board 61 close to the xenon arc lamp assembly 2. An inclined slide groove is provided on the top of the inner block 65. An inner clamping block 651 is slidably connected inside the inclined slide groove. A top spring 652 is provided between the inner clamping block 651 and the inner wall of the inclined slide groove. The contact surface between the inner clamping block 651 and the inner block 65 is an inclined surface.

[0022] Preferably, the initial position of the test pendulum 62 is at an angle of 150° with the main board 61. The counterweight 64 is on the same plane as the main board 61. The top of the main board 61 has a swing opening 612 through which the counterweight 64 can pass. The top of the inner clamping block 651 has an inclined clamping surface with an angle of 65-75° between the inclined clamping surface and the main board 61. During operation, the limit swing angle of the counterweight 64 is 90°. Therefore, the initial angle between the inclined clamping surface and the test pendulum 62 needs to be less than 90° so that the test pendulum 62 can provide the inner clamping block 651 with a downward force, allowing it to slide down a short distance.

[0023] Preferably, the counterweight 64 is fixedly mounted on the upper test pendulum 62 by mounting rod 63 and bolts.

[0024] Operating steps: 1. Installation: Fix both ends of the fabric onto the two test pendulums 62 respectively, and then fix the test assembly 6 containing the fabric onto the installation turntable 3 to complete the installation; 2. Adjust parameters: Adjust the equipment parameters, such as temperature, humidity, and environmental parameters such as possible spraying, as well as the speed of the servo motor. It should be noted that the existing equipment with temperature adjustment structure such as spraying is an existing structure and will not be described in detail in this invention.

[0025] 3. Testing: (1) Static test: When the equipment is started, the servo motor drives the installation turntable 3 to rotate at a low speed and uniform speed. At this time, the centrifugal force on the counterweight 64 is insufficient to overcome its own weight, the fabric is static and receives normal light. (2) Simulated folding dynamics: After running for a period of time, the installation turntable 3 rotates at a medium speed. At this time, the centrifugal force on the counterweight 64 is greater than the weight of the counterweight 64. Under the centrifugal force, the counterweight 64 swings upward. The extreme position of the counterweight 64 is to swing to the horizontal. At the medium speed, it does not reach the extreme position. The counterweight 64 drives the upper test pendulum 62 to swing downward. The upper test pendulum 62 drives the lower test pendulum 62 to swing upward. The two test pendulums 62 are brought together inwards. At this time, the fabric is relaxed and folded between the test pendulums 62 and the inner block 65. The medium speed is in a variable speed state, which makes the test pendulums 62 swing back and forth to simulate the folding dynamics, such as the creases of the elbows, trouser knees, collars, and clothing storage and use. It should be noted that when the fabric is folded, the mounting turntable 3 rotates at a medium speed. After the fabric is relaxed, under the action of centrifugal force, the fabric will stick to the test pendulums 62 and the inner clamping block 651 to ensure that the fabric can stably produce creases. (3) Simulate friction dynamics: After running for a period of time, the installation turntable 3 rotates at high speed, the counterweight 64 swings to the horizontal, and at the same time the test pendulum 62 swings downward. The test pendulum 62 first clamps the folded fabric between the test pendulum 62 and the inner clamping block 651. Then the test pendulum 62 continues to swing downward. The test pendulum 62 applies downward pressure to the inner clamping block 651. The inner clamping block 651 slides downward along the inclined slide. The inner clamping block 651 is misaligned relative to the test pendulum 62, so that the fabric in the middle rubs against each other. The high speed is in a variable speed state, so that the test pendulum 62 and the inner clamping block 651 are misaligned back and forth to simulate friction dynamics, such as cuffs, trouser legs, cushions, backpack contact parts, mutual friction during use, and rubbing during frequent washing. (4) Simulate stretching dynamics: Based on the characteristics of the fabric itself and the stretching parameters, first reduce the speed of the installation turntable 3 to a suitable speed, and then use the brake to quickly stop the installation turntable 3. The counterweight 64 suddenly releases the centrifugal force, and the counterweight 64 swings down quickly under the action of gravity. The counterweight 64 will swing to a negative angle, and the counterweight 64 will cause the test pendulum 62 to unfold outward. The distance between the clamping positions of the two test pendulums 62 increases, giving the fabric a stretching force. The counterweight 64 will swing back and forth multiple times under the action of inertial force before it remains stationary, simulating stretching dynamics, such as the elbows and knees of tight-fitting clothes and sportswear, furniture covers, and car seat fabrics.

[0026] The equipment is tested cyclically according to the above steps, realizing a combination of static and various dynamic testing methods to improve the accuracy of test results.

[0027] Example 2, based on the above examples, further includes a frosted surface 654 on the inclined clamping surface, and the friction between the frosted surface 654 and the fabric is greater than the friction between the fabrics.

[0028] Preferably, the test plate 62 has a frosted surface 624 on the side near the xenon arc lamp assembly 2. The friction between the frosted surface 624 and the fabric is greater than the friction between the fabrics. In this embodiment, the frosted surface 654 and the frosted surface 624 create friction between the fabrics, which better reflects the fabric friction between the sleeve and the clothing during actual use.

[0029] In embodiment three, based on the above embodiments, a buffer pad 653 is provided on the side of the inner block 65 away from the xenon arc lamp assembly 2, and the buffer pad 653 is provided correspondingly to the swing opening 612.

[0030] By setting the buffer pad 653, the counterweight 64 can reduce the vibration and noise generated by the equipment when it falls under the action of inertial force. At the same time, the elasticity of the buffer pad 653 increases the number of reciprocating swings of the counterweight 64.

[0031] Example 4, based on the above examples, further includes a clamping groove 621 at the end of the test pendulum 62 away from the main board 61, a clamping plate 622 inserted into the inside of the clamping groove 621, and the clamping plate 622 being mounted on the test pendulum 62 by locking bolts 623.

[0032] Place one end of the fabric into the clamping groove 621, and then tighten the locking bolt 623. The clamping plate 622 will tightly clamp the fabric in the clamping groove 621, thus achieving rapid fixation of the fabric.

[0033] Example 5, based on the above examples, further includes a sliding groove on the outer side of the main board 61, the sliding groove being located on the high end of the inclined sliding groove, a connecting slider 67 being slidably connected inside the sliding groove, and connecting rods 66 being hinged to the top and bottom of the connecting slider 67, the connecting rods 66 being hinged to the corresponding test pendulum 62.

[0034] This embodiment is a specific test pendulum 62 synchronous swing structure. When the upper test pendulum 62 swings downward, the upper test pendulum 62 drives the connecting slider 67 to slide outward along the slide groove through the connecting rod 66. The connecting slider 67 drives the lower test pendulum 62 to swing downward synchronously through the lower connecting rod 66. Moreover, the connecting slider 67 and the connecting rod 66 are not in the sliding direction of the inner clamping block 651, so the structure will not interfere.

[0035] Example 6, based on the above examples, further includes: three sets of brackets 31 are provided on the outer side of the mounting turntable 3; the brackets 31 have sliding openings 32 inside; a lower clamping ring 4 is fixedly installed on the inner side of the brackets 31; the lower clamping ring 4 is polygonal in shape; several lower slots 41 are opened through the inner side of the lower clamping ring 4; an upper clamping ring 5 is provided on the inner side of the brackets 31; several upper slots 51 are opened through the inner side of the upper clamping ring 5; three sets of sliding pillars 52 are arranged in a ring on the outer side of the upper clamping ring 5; the sliding pillars 52 pass through the sliding openings 32; a locking knob 53 is threadedly connected to the outer side of the sliding pillars 52; the locking knob 53 is located on the outer side of the brackets 31; and a clamping block 611 is fixedly installed on the lower half of the main board 61 on the side away from the xenon arc lamp assembly 2; the clamping block 611 is T-shaped and can be inserted into the lower slots 41 and the upper slots 51.

[0036] First, secure the upper clamping ring 5 at the top using the locking knob 53. Then, place the test component 6 inside the upper clamping ring 5, align it with the lower slot 41, and insert the bottom end of the insert block 611. At this point, the test component 6 can be released, completing the pre-installation. Next, loosen the locking knob 53 to push the upper clamping ring 5 down, aligning the upper slot 51 with the top of the insert block 611. Insert the top of the insert block 611 into the upper slot 51, and then tighten the locking knob 53 to complete the fixed installation of all test components 6. Installation is convenient. Furthermore, the installation position is located at the lower test pendulum 62, which will not affect the swing of the counterweight 64.

[0037] The lower clamping ring 4 and the upper clamping ring 5 can be set into polygons, making it easier to position and install the test component 6.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lightfastness testing machine for textiles, comprising a body (1), characterized in that, The upper inner part of the body (1) is equipped with a xenon arc lamp assembly (2), and the lower inner part of the body (1) is rotatably equipped with an installation turntable (3). The xenon arc lamp assembly (2) is located at the center of the installation turntable (3). The installation turntable (3) is driven by a servo motor, and a brake is provided at the bottom of the installation turntable (3). Several test components (6) are installed in a ring on the outer side of the installation turntable (3). The test assembly (6) includes a main board (61) fixedly mounted on the mounting turntable (3). Test pendulums (62) are hinged to the top and bottom of the main board (61). The two test pendulums (62) can swing synchronously in opposite directions. A counterweight (64) is provided on the side of the upper test pendulum (62) away from the xenon arc lamp assembly (2). An inner block (65) is fixedly mounted on the side of the main board (61) close to the xenon arc lamp assembly (2). An inclined groove is provided on the top of the inner block (65). An inner clamping block (651) is slidably connected inside the inclined groove. A top spring (652) is provided between the inner clamping block (651) and the inner wall of the inclined groove. The contact surface between the inner clamping block (651) and the inner block (65) is an inclined surface.

2. The lightfastness testing machine for textiles according to claim 1, characterized in that, The initial position of the test pendulum (62) is at an angle of 150° with the main board (61). The counterweight (64) and the main board (61) are on the same plane. The top of the main board (61) is provided with a swing opening (612) through which the counterweight (64) can pass. The top of the inner clamping block (651) is provided with an inclined clamping surface, and the angle between the inclined clamping surface and the main board (61) is 65-75°.

3. The lightfastness testing machine for textiles according to claim 2, characterized in that, The inclined clamping surface is a frosted surface one (654), and the friction between the frosted surface one (654) and the fabric is greater than the friction between the fabrics.

4. The lightfastness testing machine for textiles according to claim 3, characterized in that, The test plate (62) has a frosted surface two (624) on the side near the xenon arc lamp assembly (2). The friction between the frosted surface two (624) and the fabric is greater than the friction between the fabric and the fabric.

5. A lightfastness testing machine for textiles according to claim 4, characterized in that, The inner block (65) has a buffer pad (653) on the side away from the xenon arc lamp assembly (2), and the buffer pad (653) is correspondingly arranged with the swing opening (612).

6. A lightfastness testing machine for textiles according to claim 5, characterized in that, The test pendulum (62) has a clamping groove (621) at one end away from the main board (61). A clamping plate (622) is inserted into the clamping groove (621), and the clamping plate (622) is installed on the test pendulum (62) by locking bolts (623).

7. A lightfastness testing machine for textiles according to claim 6, characterized in that, The main board (61) has a sliding groove on its outer side. The sliding groove is located on the side of the high end of the inclined sliding groove. A connecting slider (67) is slidably connected inside the sliding groove. A connecting rod (66) is hinged to the top and bottom of the connecting slider (67). The connecting rod (66) is hinged to the corresponding test pendulum (62).

8. A lightfastness testing machine for textiles according to claim 1, characterized in that, The counterweight (64) is fixedly mounted on the upper test pendulum (62) by the mounting rod (63) and bolts.

9. A lightfastness testing machine for textiles according to claim 1, characterized in that, Three sets of brackets (31) are provided on the outer side of the mounting turntable (3). A sliding opening (32) is provided inside the bracket (31). A lower clamping ring (4) is fixedly installed on the inner side of the bracket (31). The lower clamping ring (4) is polygonal in shape, and several lower slots (41) are provided through its interior. An upper clamping ring (5) is provided on the inner side of the bracket (31). Several upper slots (51) are provided through its interior. Three sets of sliding pillars (52) are arranged in an outer ring. The sliding pillars (52) pass through the sliding opening (32). The outer side of the sliding pillars (52) is threaded with a locking knob (53). The locking knob (53) is located on the outside of the bracket (31). The lower half of the main board (61) away from the xenon arc lamp assembly (2) is fixedly installed with a clamping block (611). The clamping block (611) is T-shaped and can be inserted into the lower slot (41) and the upper slot (51).

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