A weather resistance testing device for printed fabrics

Abstract

This invention provides a weather resistance testing device for printed fabrics, relating to the field of textile quality testing. It includes a base and a housing fixedly connected to the top of the base, a testing mechanism, an ultraviolet lamp, an air outlet, a blowing assembly, and a rotating mechanism. The testing mechanism is disposed within the housing and used to fix the fabric to be tested. The ultraviolet lamp is positioned above the testing mechanism, and the air outlet is positioned below the testing mechanism. The blowing assembly is disposed within the base and used to supply air to the air outlet. The rotating mechanism is disposed on the housing and is drively connected to the testing mechanism. This weather resistance testing device for printed fabrics, through the rotating mechanism driving the testing mechanism to rotate periodically, achieves automatic switching between two modes: ultraviolet irradiation and bottom air blowing on the printed surface of the fabric. It accurately simulates the real aging environment of alternating outdoor sun exposure and wind exposure, making the testing conditions more comprehensive and the results more reliable.

Description

Technical Field

[0001] This invention relates to the field of textile quality testing technology, specifically to a weather resistance testing device for printed fabrics. Background Technology

[0002] Combed cotton digital inkjet printed fabric is widely used in high-end apparel and home textiles due to its delicate texture, vibrant colors, and rich detail in the printed patterns. Its colorfastness and weather resistance are key indicators determining product lifespan and quality maintenance. In practical use, products made from this type of fabric, such as curtains and outdoor furniture covers, are exposed to complex natural environments for extended periods, alternating between sunlight and wind. Ultraviolet radiation can cause the molecular chains of the printing pigments to break and fade, while continuous wind action can cause periodic tension and relaxation in the fabric, potentially exacerbating micro-cracks and peeling of the coating. Therefore, during the research and development and quality control stages, simulating this complex aging environment of alternating sun and wind exposure through accelerated testing is crucial for predicting product durability and optimizing the printing process.

[0003] Currently, most common weather resistance testing equipment consists of single-environment simulation chambers, such as UV aging test chambers or wind erosion test chambers. These chambers have a limited testing mode, only allowing for one test at a time, either UV light exposure or wind erosion. They cannot simulate real-world scenarios where both occur alternately, resulting in significant discrepancies between test results and actual conditions. Furthermore, the fixed testing conditions, where the fabric is statically stretched during testing, fail to simulate the natural, periodic changes in fabric tension and relaxation caused by its own weight and wind during outdoor use, thus ignoring the synergistic effect of mechanical stress on the aging process. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a weather resistance testing device for printed fabrics. This device can simulate the combined aging conditions of alternating sun exposure and wind exposure in outdoor environments, and can automatically adjust the fabric tension according to the test conditions, making the testing process closer to real-world usage scenarios, thereby obtaining more accurate and reliable weather resistance assessment data.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a weather resistance testing device for printed fabrics, comprising a base and a housing fixedly connected to the top of the base, and further comprising a testing mechanism, an ultraviolet lamp, an air outlet, a blowing assembly, and a rotating mechanism; the testing mechanism is disposed within the housing and is used to fix the fabric to be tested; the ultraviolet lamp is disposed above the testing mechanism; the air outlet is disposed below the testing mechanism; the blowing assembly is disposed within the base and is used to supply air to the air outlet; the rotating mechanism is disposed on the housing and is drively connected to the testing mechanism, and is used to drive the testing mechanism and the fixed fabric to rotate, so that the printed surface of the fabric alternately faces the ultraviolet lamp and the air outlet.

[0006] Furthermore, the rotating mechanism includes a motor, a reduction gearbox, and a rotating shaft; the reduction gearbox is fixed to the housing, the output end of the motor is connected to the input end of the reduction gearbox, the output end of the reduction gearbox is connected to the rotating shaft, and the rotating shaft is drivenly connected to the detection mechanism.

[0007] Furthermore, the detection mechanism includes two opposing fixing components, each of which includes a fixing seat, a clamping plate, a screw, and a knob; the fixing seat is U-shaped; the screw is threaded into the fixing seat, its bottom end is rotatably connected to the clamping plate, and its top end is fixedly connected to the knob.

[0008] Furthermore, the detection mechanism also includes two opposing adjustment components; the two fixing components are respectively mounted on the two adjustment components; the adjustment components are configured to automatically adjust the relative distance between the two fixing components in response to the rotation angle of the detection mechanism, so as to change the tension of the fixed fabric.

[0009] Further, each of the adjustment components includes a first pressure chamber, a second pressure chamber, a first piston, a second piston, and a counterweight; the first piston is slidably disposed within the first pressure chamber to form a first pressure chamber, and the first piston is connected to the corresponding fixing component; the second pressure chamber is fixedly connected to and communicates with the first pressure chamber, and the second piston is slidably disposed within it to form a second pressure chamber; the counterweight is fixedly connected to the second piston; the adjustment component is configured such that: when the detection mechanism rotates to the point where the printed surface of the fabric faces upward, the counterweight drives the second piston to move, causing gas to transfer between the first and second pressure chambers, thereby driving the first piston to move to tension the fabric; when rotated to the point where the printed surface faces downward, the counterweight drives the second piston to move in the opposite direction, causing the first piston to move in the opposite direction to relax the fabric.

[0010] Furthermore, a baffle plate is fixedly connected between the two adjustment components.

[0011] Furthermore, the fixing component is fixedly connected to the middle of the outer side of the first piston, and the rotating shaft is fixedly connected to the second air chamber.

[0012] Furthermore, the fixing assembly also includes a guide rod; the top of the clamping plate is fixedly connected to the guide rod, and the fixing seat has a guide hole that slides with the guide rod.

[0013] This invention provides a weather resistance testing device for printed fabrics. It has the following beneficial effects: 1. This weather resistance testing equipment for printed fabrics uses a rotating mechanism to drive the testing mechanism to rotate periodically, which realizes the automatic switching between two modes: ultraviolet irradiation and bottom air blowing on the printed surface of the fabric. It accurately simulates the real aging environment of alternating outdoor sun exposure and wind exposure, making the test conditions more comprehensive and the results more reliable.

[0014] 2. This weather resistance testing equipment for printed fabrics utilizes a gravity-pneumatic linkage adjustment component. It leverages the gravitational potential energy generated by the changing rotation angle of a counterweight to drive a piston, automatically and precisely adjusting the fabric tension through a closed air passage. When the printed side faces upwards to receive ultraviolet radiation, the fabric automatically tightens to ensure even irradiation; when facing downwards to receive wind, the fabric automatically relaxes appropriately, simulating the natural flow of fabric in the wind. This dynamic tension variation more realistically reflects the usage scenario and effectively assesses the synergistic effect of mechanical stress and light / wind aging factors.

[0015] 3. This weather resistance testing equipment for printed fabrics only requires the user to clamp the equipment once and set the rotation cycle. The equipment can then automatically complete the alternating aging test, avoiding the hassle of transferring samples between different devices and greatly improving testing efficiency and consistency. It is especially suitable for high-value-added products such as combed cotton digital inkjet printed fabrics that require strict and long-term weather resistance evaluation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the adjustment component structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the adjustment component structure of the present invention. Figure 2 .

[0017] In the diagram: 1. Base; 2. Housing; 3. Air outlet; 4. Ultraviolet lamp; 5. Detection mechanism; 51. Fixing seat; 52. Screw; 53. Knob; 54. Guide rod; 55. Clamping plate; 56. Baffle plate; 57. First piston; 58. First air chamber; 59. Second piston; 510. Second air chamber; 511. Counterweight; 6. Rotating mechanism; 61. Motor; 62. Gearbox; 63. Rotating shaft. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] This invention provides a weather resistance testing device for printed fabrics, such as... Figures 1 to 5 As shown, it includes a base 1, a housing 2, a detection mechanism 5, an ultraviolet lamp 4, a blower assembly, and a rotating mechanism 6.

[0020] The base 1 serves as the supporting foundation for the equipment, and the blowing assembly is installed inside it. The blowing assembly includes a conventional fan and air duct used in the prior art to generate airflow. The housing 2 is fixed to the top of the base 1, forming a relatively sealed test chamber. At least one set of ultraviolet lamps 4 are installed at the top inside the housing 2 to simulate ultraviolet radiation from sunlight. An air outlet 3 communicating with the blowing assembly is provided at the bottom inside the housing 2.

[0021] The detection mechanism 5 is the core component that carries and fixes the fabric to be tested. It is rotatably mounted inside the housing 2 via a rotating mechanism 6. The rotating mechanism 6 includes a motor 61, a reduction gearbox 62, and a rotating shaft 63. The reduction gearbox 62 is fixed to the outer wall of the housing 2, and the motor 61 drives the reduction gearbox 62. The output end of the reduction gearbox 62 drives the rotating shaft 63 to rotate, and the rotating shaft 63 is fixedly connected to the detection mechanism 5, thereby driving the entire detection mechanism 5 to perform a 180-degree periodic reciprocating rotation inside the housing 2.

[0022] The detection mechanism 5 is specifically composed of two sets of symmetrically arranged adjustment components and two sets of fixed components installed on it.

[0023] Fixing assembly: Used to clamp the fabric. It includes a U-shaped fixing base 51, a clamping plate 55, a screw 52, ​​and a knob 53. The screw 52 is threaded into the top of the fixing base 51, its bottom end is rotatably connected to the clamping plate 55, and the knob 53 is fixed at its top. Rotating the knob 53 drives the clamping plate 55 to move up and down, thereby engaging with the bottom platform of the fixing base 51 to clamp or release the end of the fabric. To ensure smooth movement of the clamping plate 55, a guide rod 54 is also fixed to its top, and the guide rod 54 slides into a guide hole on the fixing base 51.

[0024] Adjustment components are key to achieving automatic tension adjustment. Each adjustment component includes a first air chamber 58 and a second air chamber 510. A first piston 57 is slidably sealed within the first air chamber 58, forming a first air chamber. The fixing seat 51 of the fixing component is integrally fixed to the outer surface of the first piston 57. The second air chamber 510 is fixedly connected to the first air chamber 58 via a partition, and the two are connected internally through a connecting hole. A second piston 59 is slidably sealed within the second air chamber 510, forming a second air chamber. A counterweight 511 is fixed to the second piston 59. The second air chambers 510 of the two adjustment components are rigidly connected by a baffle plate 56 to ensure synchronous rotation. The baffle plate 56 ensures that ultraviolet rays will not irradiate the back of the fabric in wind-blown mode, resulting in purer testing conditions. The entire testing mechanism 5 is fixedly connected to the end of one of the second air chambers 510 via a rotating shaft 63.

[0025] The entire tension adjustment process is completed automatically by the mechanical structure, without the need for additional sensors or controllers, resulting in high reliability and low cost.

[0026] Working principle: Loading: Rotate knob 53 to loosen clamping plate 55, place both ends of the rectangular fabric to be tested into the clamping mouths of the two fixing components respectively, and then tighten knob 53 to clamp it.

[0027] UV irradiation mode (fabric taut state, such as...) Figure 4 (As shown): The control system starts, and the motor 61 of the rotating mechanism 6 drives the detection mechanism 5 to rotate through the reduction gearbox 62 until the printed surface of the fabric faces upwards and is directly facing the ultraviolet lamp 4. At this time, the side of the second piston 59 fixedly connected to the counterweight 511 faces downwards. Under the action of gravity, the counterweight 511 tends to move downwards, causing the second piston 59 to move downwards. This increases the volume of the second pressure chamber and reduces the air pressure, thereby "drawing" the gas in the first pressure chamber into the second pressure chamber. The decrease in air pressure in the first pressure chamber causes the first piston 57 to move inwards under the action of external atmospheric pressure. The two first pistons 57 move inwards synchronously, causing the two fixed components to move away from each other, thereby laterally tensioning and flattening the fabric suspended between them. This state is conducive to the uniform and sufficient irradiation of ultraviolet light on the flat printed surface.

[0028] Blow-dry mode (fabric in a relaxed state, such as...) Figure 5(As shown): After a preset ultraviolet irradiation time, motor 61 restarts, driving detection mechanism 5 to rotate 180 degrees, so that the printed side of the fabric faces down, directly opposite air outlet 3. At this time, the side of the second piston 59 fixedly connected to the counterweight 511 faces upward. The direction of gravity of the counterweight 511 changes, causing the second piston 59 to move downward, compressing the second pressure chamber. The air pressure in the second pressure chamber increases, "pushing" the gas back to the first pressure chamber. The increased air pressure in the first pressure chamber pushes the first piston 57 to move outward, bringing the two fixed components closer together, thereby releasing the lateral tension of the fabric, making it loose and naturally drooping. At this time, the blowing assembly starts, and the airflow blows upward from air outlet 3, acting on the back of the relaxed fabric, simulating the state of natural wind blowing. The baffle 56 is positioned directly above the fabric at this time, blocking the light from the ultraviolet lamp 4 and preventing it from causing unnecessary irradiation to the back of the fabric.

[0029] Cyclic test: The equipment repeats steps 2 and 3 according to the set time cycle, so that the fabric is continuously subjected to alternating aging tests of "ultraviolet irradiation (tension)" and "wind blowing (relaxation)" until the preset total test time is reached.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weather resistance testing device for printed fabrics, comprising a base (1) and a housing (2) fixedly connected to the top of the base (1), characterized in that: It also includes a testing mechanism (5), an ultraviolet lamp (4), an air outlet (3), a blowing assembly, and a rotating mechanism (6); the testing mechanism (5) is located inside the housing (2) and is used to fix the fabric to be tested; the ultraviolet lamp (4) is located above the testing mechanism (5); the air outlet (3) is located below the testing mechanism (5); and the blowing assembly is located inside the base (1) and is used to supply air to the air outlet (3). The rotating mechanism (6) is mounted on the housing (2) and is connected to the detection mechanism (5) for driving the detection mechanism (5) and its fixed fabric to rotate so that the printed surface of the fabric alternately faces the ultraviolet lamp (4) and the air outlet (3).

2. The weather resistance testing equipment for printed fabrics according to claim 1, characterized in that: The rotating mechanism (6) includes a motor (61), a gearbox (62), and a rotating shaft (63); the gearbox (62) is fixed on the housing (2), the output end of the motor (61) is connected to the input end of the gearbox (62), the output end of the gearbox (62) is connected to the rotating shaft (63), and the rotating shaft (63) is driven to connect to the detection mechanism (5).

3. The weather resistance testing equipment for printed fabrics according to claim 1 or 2, characterized in that: The detection mechanism (5) includes two fixed components arranged opposite to each other. Each fixed component includes a fixed seat (51), a clamping plate (55), a screw (52) and a knob (53). The fixed seat (51) is U-shaped. The screw (52) is threadedly engaged with the fixed seat (51), its bottom end is rotatably connected to the clamping plate (55), and its top end is fixedly connected to the knob (53).

4. The weather resistance testing equipment for printed fabrics according to claim 3, characterized in that: The detection mechanism (5) further includes two opposing adjustment components; the two fixing components are respectively installed on the two adjustment components; the adjustment components are configured to automatically adjust the relative distance between the two fixing components in response to the rotation angle of the detection mechanism (5) to change the tension of the fixed fabric.

5. The weather resistance testing equipment for printed fabrics according to claim 4, characterized in that: Each of the adjustment components includes a first pressure chamber (58), a second pressure chamber (510), a first piston (57), a second piston (59), and a counterweight (511); the first piston (57) is slidably disposed in the first pressure chamber (58) to form a first pressure chamber, the first piston (57) is connected to the corresponding fixing component, the second pressure chamber (510) is fixedly connected to the first pressure chamber (58) and communicates with it, the second piston (59) is slidably disposed in the second pressure chamber to form a second pressure chamber, and the counterweight (511) is fixedly connected to the second piston (59); The adjustment component is configured such that when the detection mechanism (5) rotates to the point where the printed surface of the fabric faces upward, the counterweight (511) drives the second piston (59) to move, causing gas to transfer between the first and second pressure chambers, thereby driving the first piston (57) to move to tension the fabric; when rotated to the point where the printed surface faces downward, the counterweight (511) drives the second piston (59) to move in the opposite direction, causing the first piston (57) to move in the opposite direction to relax the fabric.

6. The weather resistance testing equipment for printed fabrics according to claim 4, characterized in that: A baffle plate (56) is fixedly connected between the two adjustment components.

7. The weather resistance testing equipment for printed fabrics according to claim 5, characterized in that: The fixing component is fixedly connected to the middle of the outer side of the first piston (57), and the rotating shaft (63) is fixedly connected to the second air pressure chamber (510).

8. The weather resistance testing equipment for printed fabrics according to claim 3, characterized in that: The fixing assembly also includes a guide rod (54); the top of the clamp (55) is fixedly connected to the guide rod (54), and the fixing seat (51) is provided with a guide hole that slides with the guide rod (54).

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