A printed matter light resistance test platform

Abstract

The utility model provides a kind of printed matter light resistance test platform, including bottom plate, two positioning mechanisms are arranged at the bottom plate upper side interval, the positioning mechanism includes support part, connecting part and movable pressing block, the support part has support base surface, the movable pressing block lower side has a crimping surface, the side edge of movable pressing block is with the connecting part movable;The upper side of movable pressing block is equipped with sunshade mounting groove, the groove bottom of sunshade mounting groove forms sunshade receiving surface parallel to crimping surface, the sunshade mounting groove forms lateral notch in the side edge of movable pressing block away from connecting part, the lateral notch of two positioning mechanisms is towards opposite.This utility model can set sunshade to change the local light reception of printed matter, so as to obtain the color difference data of printed matter under different illumination conditions in single test, can more conveniently explore the influence of different illumination conditions on printed matter.

Description

Technical Field

[0001] This utility model relates to the field of lightfastness testing technology for materials, and specifically to a lightfastness testing platform for printed materials. Background Technology

[0002] In the printing industry, it is often necessary to test the lightfastness of printing materials. In traditional testing methods, the sample is usually laid flat or simply fixed on a test platform, exposed to light using a light source, and then the lightfastness of the printing material is evaluated by the color difference before and after exposure.

[0003] The aforementioned testing methods typically only obtain single data points on the color difference changes of printed materials under a specific light intensity and duration, making them inconvenient for investigating color difference changes under different lighting conditions. Patent application CN202222337014.5 discloses a device for testing the color fastness of cigarette labels using a lightfastness tester, comprising a support box; elongated holes on both sides of the support box's vertical plates; a detection device including a roller; a slider fitted around the cross-section of the roller; a lightfastness tester mounted at the bottom of the slider; a light source device including a cylinder; a structural cavity inside the cylinder; a lead screw mounted on the output shaft of a small motor; a light source emitter mounted on one side of a connecting block; a lifting device including a support plate; a motor mounted on the outer side of the support box; a gear mounted on the output shaft of the motor; and gears meshing with gear teeth. While the technical solution disclosed in the aforementioned patent achieves the function of adjusting the intensity of light and changing the spatial position of the detection point, it still cannot obtain the color difference changes of printed materials under different lighting conditions through a single test. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a lightfastness testing platform for printed materials. This platform can utilize auxiliary light-shielding plates to subject different areas of the printed material to varying light exposure effects, thereby obtaining multiple sets of data in a single lightfastness test, facilitating the investigation of the lightfastness of printed materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A lightfastness testing platform for printed materials includes a base plate. Two positioning mechanisms are spaced apart on the upper side of the base plate. Each positioning mechanism includes a support portion, a connecting portion, and a movable pressure block. The support portion has a support base surface parallel to the base plate and facing the upper side of the base plate. The movable pressure block has a pressing surface on its lower side. One edge of the movable pressure block is hinged to the connecting portion, such that the pressing surface and the support base surface cooperate with each other during use. A light-shielding plate mounting groove is provided on the upper side of the movable pressure block. The bottom of the light-shielding plate mounting groove forms a light-shielding plate receiving surface parallel to the pressing surface. The light-shielding plate mounting groove forms a lateral groove on the side edge of the movable pressure block away from the connecting portion. The lateral grooves of the two positioning mechanisms face each other.

[0006] Furthermore, the upper side of the movable pressure block is provided with multiple mounting slots, and the arrangement direction of the multiple mounting slots is perpendicular to the orientation of the two positioning mechanisms.

[0007] Furthermore, the light-shielding sheet receiving surface is further away from the base plate relative to the pressing surface, and the distance between the light-shielding sheet receiving surface and the pressing surface is 1~3mm.

[0008] Furthermore, the positioning mechanism also includes a limiting cover that is detachably connected to the upper side of the movable pressure block, and the lower side of the limiting cover is provided with an elastic pressure block that abuts against the mounting groove of the light shield when in use.

[0009] Furthermore, the support portion protrudes relative to the upper side of the base plate, so that the support base surface and the upper side of the base plate form a distance of 1~3mm.

[0010] Furthermore, a stepped opening is formed on the side of the movable pressing block away from the connecting portion, and the stepped opening has a stepped surface that is further away from the base plate relative to the pressing surface.

[0011] Furthermore, the width of the step opening is 5~10mm.

[0012] Furthermore, an anti-stick layer is provided on the upper side of the support and the lower side of the movable pressure block, and the support base surface and the pressing surface are both formed on the surface of the anti-stick layer.

[0013] Furthermore, the movable pressure block is made of a non-transparent material.

[0014] Furthermore, a guide rail is provided on the upper side of the base plate, and at least one of the positioning mechanisms is movably connected to the base plate through the guide rail.

[0015] The following beneficial effects can be achieved by applying this utility model: 1. After the two positioning mechanisms of this utility model fix the printed matter to be tested, a light shield can be set above the printed matter through the light shield mounting slot, so that the local light-receiving area of ​​the printed matter is covered by the light shield. The color difference between the directly illuminated area and the covered area of ​​the printed matter can be intuitively displayed, which facilitates the comparison of color differences.

[0016] 2. This utility model can set multiple light-blocking sheets, and different light-blocking sheets have different light transmittance. By comparing the color difference changes of different areas of the printed matter after being exposed to light, multiple test data can be obtained in a single test, thus making it easier to explore the influence of different lighting conditions on the printed matter.

[0017] 3. In some embodiments of this utility model, a gap is provided between the receiving surface and the pressing surface of the light-shielding sheet and between the supporting base surface and the side surface of the base plate, so that there is a gap between the light-shielding sheet and the printed matter and between the printed matter and the base plate, so as to avoid the printing matter from sticking after being exposed to heat for a long time during the test, and to prevent the light-shielding sheet and the test platform from being contaminated by adhesion. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of one embodiment of the present invention; Figure 2 This is a schematic diagram of the first state of the positioning mechanism in the embodiment; Figure 3 This is a schematic diagram of the second state of the positioning mechanism in the embodiment; Figure 4 This is a partial structural diagram of the positioning mechanism from the right side. Figure 5 This is a schematic diagram of one working state of the present invention; In the figure, 1-base plate, 2-positioning mechanism, 21-support part, 211-support base surface, 22-movable pressure block, 221-pressing surface, 222-sunshade mounting groove, 223-sunshade receiving surface, 224-side groove, 225-step opening, 23-connecting part, 24-limiting cover, 241-elastic pressure block, 3-printed material, 4-sunshade. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Reference Figures 1-5An embodiment of this utility model provides a lightfastness testing platform for printed materials, comprising a base plate 1 and two positioning mechanisms 2 spaced apart on the upper side of the base plate 1. Each positioning mechanism 2 includes a support portion 21, a connecting portion 23, and a movable pressure block 22. The support portion 21 has a supporting base surface 211 parallel to the base plate 1 and facing upwards. The movable pressure block 22 has a pressing surface 221 on its lower side. One edge of the movable pressure block 22 is hinged to the connecting portion 23, allowing the pressing surface 221 to engage with the supporting base surface 211 during use. The connecting portion 23 is located on the side of the two positioning mechanisms 2 that is far apart from each other. The upper side of the movable pressure block 22 is provided with a light-shielding plate mounting groove 222. The bottom of the light-shielding plate mounting groove 22 forms a light-shielding plate receiving surface 223 parallel to the pressing surface 221. The light-shielding plate mounting groove 222 forms a lateral groove 224 on the edge of the movable pressure block 22 that is far apart from the connecting portion 23. The lateral grooves 224 of the two positioning mechanisms 2 face each other.

[0021] During testing, the movable pressure block 22 is lifted, and the two ends of the printed material 3 to be tested are placed on the support base surfaces 211 of the two positioning mechanisms, respectively. Then, the movable pressure block 22 is pressed down, so that the pressing surface 221 and the support base surface 211 fix the printed material. In a preferred embodiment, the support part 21 and the movable pressure block 22 can be equipped with mutually cooperating magnetic suction components. The magnetic suction components make the printed material more stable and facilitate the removal of the printed material. After fixing the printed material, a long strip light-shielding sheet 4 with a size corresponding to the mounting slot 22 is selected. The two ends of the light-shielding sheet 4 are respectively inserted into the light-shielding sheet mounting slot 22 from the side slots 224 of the two positioning mechanisms and placed on the light-shielding sheet receiving surface 223. The width of the light-shielding sheet 4 is smaller than that of the printed material to be tested, so that a local area of ​​the printed material to be tested is covered by the light-shielding sheet, so that different areas of the printed material are subjected to different light exposure effects during the lightfastness test. The light-shielding sheet can be made of opaque material or semi-transparent material, depending on the test requirements.

[0022] In one embodiment, a stepped opening 225 is formed on the side edge of the movable pressure block 22 away from the connecting part 23. The stepped opening 225 is recessed in the direction away from the base plate 1 relative to the pressing surface 221, so that the stepped opening 225 has a stepped surface that is further away from the base plate 1 relative to the pressing surface 221. When the movable pressure block 22 is engaged with the support part 21, the printed matter in the area corresponding to the stepped opening is in a non-pressurized state, thereby preventing the printed matter in this edge area from being heated and adhering to the movable pressure block 22 or the support part 21 during the test.

[0023] In one embodiment, a limiting cover 24 is provided on the upper side of the movable pressure block 22. The limiting cover 24 is detachably installed at a position corresponding to the light-shielding sheet mounting groove 22. An elastic pressure block 241 is provided on the lower side of the limiting cover 24. When the limiting cover is in the closed state, the elastic pressure block 241 applies pressure to the light-shielding sheet 224 placed on the light-shielding sheet receiving surface 223 to fix the light-shielding sheet 224.

[0024] In one embodiment, the support portion 21 protrudes relative to the upper side of the base plate 1, and the support base surface 211 forms a gap of 1-3 mm with the upper side of the base plate. The light-shielding sheet receiving surface 223 is further away from the base plate 1 than the pressing surface 221, and a gap of 1-3 mm is formed between the light-shielding sheet receiving surface 223 and the pressing surface 221. This creates a gap between the light-shielding sheet 4 and the printed material 3, and between the printed material 3 and the base plate 1, preventing the printed material from adhering after prolonged exposure and heating during the test, and preventing the light-shielding sheet and the test platform from being contaminated by adhesion. In a further embodiment, an anti-adhesive layer is provided on the upper side of the support portion and the lower side of the movable pressure block. The support base surface and the pressing surface are both formed on the surface of the anti-adhesive layer, thereby preventing the printed material from adhering.

[0025] In one embodiment, a guide rail is provided on the upper side of the base plate, and one or two positioning mechanisms are movably engaged with the base plate through the guide rail and are fixed relative to the base plate by locking components, so that the distance between the two positioning mechanisms can be adjusted to meet different testing requirements.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightfastness testing platform for printed materials, characterized in that: The device includes a base plate, on the upper side of which two positioning mechanisms are spaced apart. Each positioning mechanism includes a support portion, a connecting portion, and a movable pressure block. The support portion has a support base surface parallel to the base plate and facing the upper side of the base plate. The movable pressure block has a pressing surface on its lower side. One edge of the movable pressure block is hinged to the connecting portion, such that the pressing surface and the support base surface cooperate with each other during use. The upper side of the movable pressure block is provided with a light-shielding plate mounting groove. The bottom of the light-shielding plate mounting groove forms a light-shielding plate receiving surface parallel to the pressing surface. The light-shielding plate mounting groove forms a lateral groove on the edge of the movable pressure block away from the connecting portion. The lateral grooves of the two positioning mechanisms face each other.

2. The lightfastness testing platform for printed materials according to claim 1, characterized in that: The upper side of the movable pressure block is provided with multiple mounting slots, and the arrangement direction of the multiple mounting slots is perpendicular to the orientation of the two positioning mechanisms.

3. The lightfastness testing platform for printed materials according to claim 1, characterized in that: The light-shielding sheet receiving surface is further away from the base plate than the pressing surface, and the distance between the light-shielding sheet receiving surface and the pressing surface is 1~3mm.

4. The lightfastness testing platform for printed materials according to claim 1, characterized in that: The positioning mechanism also includes a limiting cover that is detachably connected to the upper side of the movable pressure block, and the lower side of the limiting cover is provided with an elastic pressure block that abuts against the mounting groove of the light shield when in use.

5. The lightfastness testing platform for printed matter according to claim 1, characterized in that: The support protrudes from the upper side of the base plate, so that the support base surface and the upper side of the base plate form a gap of 1~3mm.

6. The lightfastness testing platform for printed matter according to claim 1, characterized in that: A stepped opening is formed on the side of the movable pressing block away from the connecting part, and the stepped opening has a stepped surface that is further away from the base plate relative to the pressing surface.

7. The lightfastness testing platform for printed matter according to claim 6, characterized in that: The width of the step opening is 5~10mm.

8. The lightfastness testing platform for printed matter according to claim 1, characterized in that: An anti-stick layer is provided on the upper side of the support and the lower side of the movable pressure block, and the support base surface and the pressing surface are both formed on the surface of the anti-stick layer.

9. A lightfastness testing platform for printed matter according to claim 1, characterized in that: The movable pressure block is made of a non-transparent material.

10. A lightfastness testing platform for printed matter according to claim 1, characterized in that: A guide rail is provided on the upper side of the base plate, and at least one of the positioning mechanisms is movably connected to the base plate through the guide rail.

Images