Sample fixing device for testing color fastness to light of printed matter or printed and dyed product

Abstract

The utility model discloses a sample fixing device for testing the color fastness to light of printed matters or printed and dyed products, which particularly belongs to the technical field of testing of the color fastness to light and comprises a hollow frame body with an opening at one end, a grating baffle plate and a fixing clamping plate for flattening a test sample, sliding grooves are formed in the peripheral walls of the frame body, and the light blocking grating plates are correspondingly arranged in the sliding grooves in a sliding mode; the side wall of the frame body is provided with a sliding groove for the fixed clamping plate to slide, the sliding groove is located below the sliding groove, and the fixed clamping plate is arranged in the sliding groove in a sliding mode. By using the sample fixing device, a test sample in an irregular shape can be shaded, so that a worker does not need to singly cut the sample into a regular shape or singly cut off a certain special part for detection, and the working efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing color fastness to light, and in particular relates to a sample fixing device for testing the color fastness to light of printed products or printed and dyed products. Background Art

[0002] At present, in the field of testing, the test of color fastness to light is an important project that simulates the degree of color change of dyes under sunlight. This project can be for inks printed on paper materials or for dyes printed on textile fabrics. In terms of testing standards, the Chinese national standard GB / T 22771-2008 "Printing technology printed and dyed products and printing and dyeing inks - Evaluation of light fastness using filtered xenon arc lamps" is for printed products, while the Chinese national standard GB / T 8427-2019 "Textiles - Test for color fastness to artificial light: Xenon arc" and the American Association of Textile Chemists and Colorists standard AATCC TM16.3-2020 "Test method for color fastness to light: Xenon arc" are for textile products. The testing process is as follows: select paper materials or textile fabrics printed with specified colors (usually a single color), cut them into rectangles of specified size according to the standard, put them into a sunlight color fastness instrument, expose them to simulated sunlight for a certain period of time, then take out the exposed samples, compare the exposed color with the unexposed color (original), and finally evaluate the light fastness test results based on the degree of fading (expressed in digital levels, with 1 being the worst and 5 being the best).

[0003] Printing and dyeing on printed materials and textile products are often dyed the same color as a whole. When testing light fastness, you only need to select any part of the same color to conduct subsequent machine testing. With the improvement of people's living standards in recent years, a large number of irregular patterns and graphics have been printed on paper packaging and textile products. In order to test the light fastness of these irregular patterns and graphics, laboratory testing engineers generally use tools such as scissors or tweezers to peel off such irregular patterns from the original substrate. This method is relatively primitive, and pure manual operation is also relatively boring and cumbersome. It often takes about 5-10 minutes to process an ordinary sample (depending on the degree of responsibility of the pattern). For some large commercial testing laboratories with large daily testing batches, this step greatly affects the testing efficiency and has gradually become one of the operational shortcomings of the light fastness test project. Summary of the invention

[0004] The purpose of the utility model is to provide a sample fixing device for testing the light fastness of printed or dyed products, which can shield irregularly shaped test samples from light, thereby eliminating the need for workers to cut the samples into regular shapes or cut off a special part for testing, thereby greatly improving work efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sample fixing device for testing the light fastness of printed or dyed products comprises a hollow frame body with an opening at one end, a light blocking grating plate and a fixed clamping plate for flattening the test sample; sliding grooves are arranged on the four walls of the frame body, and the light blocking grating plate is slidably arranged in the sliding grooves; the side walls of the frame body are provided with sliding grooves for the fixed clamping plate to slide, the sliding grooves are located below the sliding grooves, and the fixed clamping plate can be slidably arranged in the sliding grooves.

[0007] First, simply cut out a square (or rectangle) from the original sample of the paper material or textile fiber that needs to be tested for light fastness, ensuring that the cut size is smaller than the size of the fixed splint, and then lay it flat on the fixed splint, and then pass the two connected through the slide slot and touch the side bottom surface of the frame. And insert four stainless steel grids into the slide slot, and then adjust the position of the grid by pushing, so as to achieve partial shielding of the sample and expose the local position. By using this device, the staff does not need to further cut samples of different patterns or different colors separately, which greatly increases the experimental efficiency of commercial testing.

[0008] The frame is provided with sliding grooves on all sides, and accordingly, the number of the light-blocking grating plates is also four. The structures of the four light-blocking grating plates are the same, but the sizes will change according to the shape of the frame. For example, when the frame is rectangular, two of the light-blocking grating plates will be longer than the other two light-blocking grating plates.

[0009] Preferably, the light blocking grating plate comprises a light blocking grating plate body and a sliding plate, a through groove is provided at a side end of the light blocking grating plate body, and the sliding plate is slidably disposed in the through groove.

[0010] There are multiple sliding plates, and the number of sliding plates corresponds to the through slots. When the sample is irregular in shape, the corresponding sliding plates can be adjusted separately to make the shape of the sliding plates match the shape of the sample to be tested.

[0011] Preferably, a groove is provided above the grating plate body, the groove is connected with the through groove, and a limiting convex strip is provided above the sliding plate, and the limiting convex strip is adapted to the groove.

[0012] The limiting convex strip is embedded in the groove, so that the sliding plate can be more stable when sliding. The staff can also push the sliding plate by applying a thrust to the limiting convex strip.

[0013] Preferably, a force block is fixedly provided above the limiting convex strip.

[0014] Among them, the force block is designed to make it easier for workers to apply thrust and the force application point is more precise.

[0015] Preferably, the fixed clamping plate can move in the sliding groove in a vertical direction, and accordingly, the height of the sliding groove is adapted to the movement path of the fixed clamping plate.

[0016] In the figure: 1, fixed clamping plate, 2, sliding groove, 3, through groove, 4, grating plate body, 5, force block, 6, sliding plate, 7, frame, 8, sliding groove, 9, fixed groove, 10, threaded column.

[0017] The fixed clamping plate is moved in the vertical direction to be closer to the bottom end of the sliding plate, thereby achieving a better covering effect of the sliding plate.

[0018] Preferably, a threaded groove is provided at the bottom end of the frame, and a threaded column is provided at the threaded groove. One end of the threaded column passes through the bottom end of the frame and is in tight contact with the fixed clamping plate.

[0019] The number of the thread grooves is four, and correspondingly, the number of the threaded columns is also four. By adjusting the four threaded columns, the fixed clamping plate is pushed upward, so that the test sample is close to the lower end of the light blocking grating plate, thereby achieving a light shielding effect.

[0020] Preferably, a fixing groove adapted to the end of the threaded column is provided at the bottom end of the fixing splint.

[0021] The function of the fixing groove is to prevent the fixing splint from deflecting or falling during the upward movement.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] (1) By partially shielding samples with irregular shapes or patterns through the light blocking grating plate, the purpose of measuring light fastness can be achieved. In addition, during the above process, the staff does not need to cut the samples into regular shapes. This can greatly improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the sample fixing device (front view);

[0025] Figure 2 is a schematic diagram of the structure of the sample fixing device (side view);

[0026] Figure 3 This is a schematic diagram of the sample fixing device in use (the test sample is in the shape of a flower);

[0027] Figure 4 This is a schematic diagram of the sample fixing device in use (the test sample is in a Z shape).

[0028] In the figure: 1, fixed clamping plate, 2, sliding groove, 3, through groove, 4, grating plate body, 5, force block, 6, sliding plate, 7, frame, 8, sliding groove, 9, fixed groove, 10, threaded column. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0030] Based on the above description, this embodiment makes the following supplementary description from the perspective of application:

[0031] A sample fixing device for testing the light fastness of printed or dyed products, the main part of which includes:

[0032] Frame 7;

[0033] Light blocking grating plate;

[0034] The light-blocking grating plate comprises a light-blocking grating plate body 4 and a sliding plate 6. A through slot 3 is provided at a side end of the light-blocking grating plate body 4. The sliding plate 6 is slidably disposed in the through slot 3.

[0035] Fixing splint 1.

[0036] The frame 7 and the fixing clamping plate 1 are made of transparent acrylic plates.

[0037] The light blocking grating is made of stainless steel.

[0038] The advantage of the above device is that it can easily fix the outer packaging cardboard with a certain thickness or relatively thin textile fabric on the opening plane in the device, and present it in a neat and flat state. The ink pattern or printing color that needs to be tested later can be exposed at the front opening of the device by adjusting the position of the light-blocking grating plate. And if the complex pattern is a nearly symmetrical structure, half of the pattern can be directly covered by the light-blocking grating plate. The exposed half of the pattern can be directly put into the sunlight color fastness instrument for light fastness test, and the other half of the pattern covered by the grating plate can be directly used as the reference color for subsequent color fastness change assessment operations. It is suitable for products with a small amount of samples sent for testing.

[0039] The present invention is easy to operate and can be applied to any test product with any pattern shape (including regular or irregular). All operation steps can be completed within 1 minute, which can greatly shorten the time required for manual cutting of specific patterns. The device can be reused, and the process is convenient, efficient, pollution-free, and low in energy consumption. It has strong application performance for the test of light fastness items.

Claims

1. A sample fixing device for testing the light fastness of printed or dyed products, comprising a hollow frame (7) with an open end, characterized in that: Also included is a light blocking grating plate and a fixing clamp (1) for flattening the test sample; The surrounding walls of the frame (7) are provided with sliding grooves (8), and the light blocking grating plates are slidably arranged in the sliding grooves (8); The side wall of the frame (7) is provided with a slide groove (2) for the fixed clamping plate (1) to slide, the slide groove (2) is located below the sliding groove (8), and the fixed clamping plate (1) is slidably arranged in the slide groove (2).

2. A sample fixing device for testing the light fastness of printed or dyed products according to claim 1, characterized in that: The light blocking grating plate comprises a light blocking grating plate body (4) and a sliding plate (6); a through slot (3) is provided at a side end of the light blocking grating plate body (4); and the sliding plate (6) is slidably disposed in the through slot (3).

3. A sample fixing device for testing the light fastness of printed or dyed products according to claim 2, characterized in that: A groove is provided above the grating plate body (4), the groove is connected to the through groove (3), and a limiting convex strip is provided above the sliding plate (6), the limiting convex strip is adapted to the groove.

4. A sample fixing device for testing the light fastness of printed or dyed products according to claim 1, characterized in that: A force applying block (5) is fixedly provided above the limiting convex strip.

5. A sample fixing device for testing the light fastness of printed or dyed products according to claim 1, characterized in that: The fixed clamping plate (1) can move in the sliding groove (2) along the vertical direction, and accordingly, the height of the sliding groove (2) is adapted to the movement path of the fixed clamping plate (1).

6. A sample fixing device for testing the light fastness of printed or dyed products according to claim 1, characterized in that: A threaded groove is provided at the bottom end of the frame (7), and a threaded column (10) is provided in the threaded groove. One end of the threaded column (10) passes through the bottom end of the frame (7) and is in tight contact with the fixed clamping plate (1).

7. A sample fixing device for testing the light fastness of printed or dyed products according to claim 6, characterized in that: A fixing groove (9) adapted to the end of the threaded column (10) is provided at the bottom end of the fixing clamping plate (1).

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