Device for detecting friction heat of anilox roller

Abstract

The utility model relates to the technical field of anilox rollers, in particular to a device for detecting friction heat of an anilox roller, which comprises a test container provided with a shaft hole for mounting the anilox roller to be tested; the scraper is mounted on the testing container, and a preset distance is formed between the scraper and the anilox roller to be tested; and the driving part is arranged outside the testing container and is used for driving the anilox roller to be tested to rotate according to a preset rotating speed. A relatively sealed environment is established for the friction process of the anilox roller and the scraper, a volatile solvent is adopted to replace printing ink to be adhered to the surface of the anilox roller, the anilox roller is driven to rotate to simulate the actual working process, the volatilization amount of alcohol is obtained after a test, and the magnitude of heat generated by the anilox roller and the scraper in the process is obtained according to the volatilization amount. The method has guiding significance for production and use of the anilox roller.

Description

Technical Field

[0001] The utility model relates to the technical field of anilox rollers, in particular to a device for detecting friction heat of anilox rollers. Background Art

[0002] The ceramic anilox roller is a roller used for quantitative transfer of ink in printing, coating and other processes. Its processing technology is to spray a layer of ceramic on an iron or aluminum base using a thermal spray process, and then carve tiny mesh holes of a certain specification after precision grinding and polishing. Its working principle is to immerse the anilox roller in the ink tank, and use a scraper to scrape off excess ink on the surface. The amount of ink carried by the anilox roller is the volume of the mesh holes.

[0003] However, the friction between the scraper and the anilox roller can easily cause the ink to dry up and clog the mesh. Quantitatively measuring the friction heat generated by the anilox roller has important guiding significance for the production and use of the anilox roller. Existing detection methods, such as thermocouple and far-infrared radiation temperature measurement, are affected by lubricants, and the circulating current of multiple contact points will also be affected. The friction between the anilox roller and the scraper involves ink and other media, and the contact surface is surface contact, so the thermocouple method cannot be applied; the far-infrared radiation method can only be applied to the exposed part of the friction pair surface or transparent parts, but the angle between the scraper and the anilox roller is small, and the friction position cannot be exposed, so the far-infrared radiation method cannot be used. Therefore, the existing methods cannot be applied to the detection of friction between the anilox roller and the scraper. Utility Model Content

[0004] In view of the technical problems existing in the prior art in measuring the friction heat of anilox rollers, the first aspect of the utility model proposes a device for detecting the friction heat of anilox rollers, comprising:

[0005] A test container, wherein the test container is provided with an axial hole for mounting the anilox roller to be tested;

[0006] A scraper is mounted on the test container, and a predetermined distance is provided between the scraper and the anilox roller to be tested;

[0007] A driving component, disposed outside the test container, for driving the anilox roller to be tested to rotate at a predetermined speed;

[0008] Wherein, the test container is configured as a sealed container, in which simulated ink is provided, and the simulated ink is a volatile solvent. After the driving component drives the anilox roller to be tested to rotate for a predetermined time, the heat generated by the friction between the scraper and the anilox roller to be tested is obtained according to the consumption of the volatile solvent.

[0009] Preferably, the test container is formed by splicing heat-insulating plates, and a dynamic sealing structure is provided at the axial connection between the axial hole and the anilox roller to be tested.

[0010] Preferably, the dynamic sealing structure is a polytetrafluoroethylene slip ring and a rubber ring, the polytetrafluoroethylene slip ring is fixed to the inner wall of the shaft hole, and the rubber ring is sleeved on the outer wall of the rotating shaft of the anilox roller to be tested.

[0011] Preferably, the outer wall of the rotating shaft of the anilox roller to be tested is further provided with a bearing, and the bearing is arranged outside the test container.

[0012] Preferably, the test container includes a cover, a sealing gasket is provided between the cover and the test container body, the anilox roller to be tested is mounted on a first side of the test container, and the scraper is mounted on a second side of the test container, and the second side is a side where the cover or the test container body is connected to the first side.

[0013] Preferably, the second side surface is provided with a scraper holder, and the scraper is arranged to be movable on the scraper holder to change its relative position with the anilox roller to be tested.

[0014] Preferably, a mounting plate is provided between the scraper and the tool holder, and the mounting plate and the tool holder are fixedly connected by screws.

[0015] Preferably, the bottom of the test container is provided with an inclined surface, the bottom of the inclined surface is provided with a liquid discharge port, and the liquid discharge port is provided with a valve.

[0016] Preferably, the liquid surface of the simulated ink is located at the lower half of the anilox roller to be tested.

[0017] Preferably, the surface of the test container is provided with scales.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] The present application establishes a relatively sealed environment for the friction process between the anilox roller and the scraper, adopts a volatile solvent instead of ink to adhere to the surface of the anilox roller, drives the anilox roller to rotate to simulate the actual working process, and obtains the volatilization amount of alcohol after the test, thereby obtaining the amount of heat generated by the anilox roller and the scraper in this process. The application is particularly suitable for comparing the amount of heat generated by different anilox rollers and the scraper at the same spacing, or comparing the amount of heat generated by the same anilox roller and the scraper at different spacings, which has guiding significance for the production and use of anilox rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic structural diagram of a device for detecting friction heat of anilox roller shown in the utility model;

[0022] Figure 2 It is a structural schematic diagram of the alcohol injected into the test container shown in the utility model;

[0023] Figure 3 It is a schematic diagram of the scraper shown in the utility model being adjusted on the scraper holder. DETAILED DESCRIPTION

[0024] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0025] Combination Figure 1-3 As shown, the first aspect of the utility model provides a device for detecting friction heat of anilox roller, comprising a test container 10, a scraper 30 and a driving component 40. The test container 10 is intended to provide a sealed environment for accommodating the scraper 30 and the anilox roller 20 to be tested, and to maintain the relative stability of temperature, humidity and saturated vapor pressure during the experiment. Since conventional means are not easy to obtain the friction heat between the scraper and the anilox roller, the present application adopts the evaporation of volatile gas to reflect the amount of heat.

[0026] Combination Figure 1 As shown, the test container 10 includes two oppositely distributed first side surfaces 11, the first side surface 11 is provided with an axial hole 111 for mounting the anilox roller 20 to be tested, and the scraper 30 is mounted on the second side surface of the test container 10, with a predetermined distance between the scraper 30 and the anilox roller 20 to be tested.

[0027] In this way, by adjusting the distance between the scraper 30 and the anilox roller 20 to be tested, the friction heat corresponding to different distances can be obtained experimentally.

[0028] The driving component 40 is disposed outside the test container 10 and is used to drive the anilox roller 20 to be tested to rotate at a predetermined speed, thereby avoiding the influence of the heat generated by the driving device itself on the environment inside the test container 10 and improving the accuracy of the test.

[0029] Optionally, the driving component 40 includes a motor and a coupling 41, and the coupling 41 is configured to be connectable to the shaft of the anilox roller 20 to be tested. When the anilox roller 20 to be tested does not have a protruding structure, a polygonal recessed structure may be provided at the shaft end of the anilox roller, and the coupling 41 is inserted into the recessed structure to complete the shaft connection.

[0030] Furthermore, two axial ends of the anilox roller 20 to be tested may be connected to elastic shafts, for example, retractable along the axial direction, so that it is easier to install into the test container 10 .

[0031] Furthermore, the test container 10 is configured as a sealed container, in which simulated ink is provided, the liquid level of the simulated ink is in the lower half of the anilox roller 20 to be tested, the simulated ink is a volatile solvent, and after the driving component 40 drives the anilox roller 20 to be tested to rotate for a predetermined time, the heat generated by the friction between the scraper 30 and the anilox roller 20 to be tested is obtained according to the consumption of the volatile solvent.

[0032] It can be understood that volatile solvents can more easily reflect the amount of heat generated by the anilox roller. Alcohol can be used as the volatile solvent. The alcohol solution should be poured into the test container 10 so that it contacts the lower half of the anilox roller 20 to be tested and cannot overflow the rotating shaft of the anilox roller 20 to be tested to prevent leakage. When the anilox roller 20 to be tested rotates, the heat generated on its surface evaporates the alcohol, so the volume of the alcohol solution decreases. After rotating for a certain period of time, pour out the remaining alcohol and calculate the amount of alcohol volatilization. This volatilization rate is positively correlated with the amount of heat. The higher the heat generated, the faster the volatilization.

[0033] Specifically, the friction heat of the test anilox roller 20 and the scraper 30 is calculated according to the latent heat of vaporization formula Q2=m·r;

[0034] In the formula, m is the mass of evaporated alcohol, r is the latent heat of vaporization, and the latent heat of vaporization of alcohol at normal pressure is 925 kJ / kg.

[0035] According to the evaporation rate formula U = (p / ρ1)[μ / (2πRT)]^1 / 2;

[0036] In the formula, p is the saturated vapor pressure, ρ1 is the density of alcohol, μ is the molar mass, R is the universal gas constant, and T is the thermodynamic temperature.

[0037] Among them, the saturated vapor pressure p can be found in the "Solvent Handbook" to obtain the saturated vapor pressure of alcohol at different temperatures (such as "Solvent Handbook" fourth edition page 389); R = 8.314510 J / (molk); the relationship between thermodynamic temperature T and degrees Celsius t: Tt+273.15(K).

[0038] According to the above formula, the evaporation of alcohol is only related to the absorbed heat.

[0039] Therefore, the heat released by the friction of the anilox roller 20 and the scraper 30 during the test can be obtained based on the evaporation mass of alcohol ((V1-V2)*ρ1, V1 is the volume of alcohol before the test, and V2 is the volume of alcohol after the test) and the latent heat of vaporization.

[0040] Optionally, the test container 10 is provided with a display screen outside, and by inputting the alcohol volume before the test and the alcohol volume after the test, the heat released by friction during the test can be directly calculated through the built-in calculation module.

[0041] In an optional embodiment, the test container 10 is formed by splicing heat-insulating plates, so that the temperature inside the test container 10 can be kept stable and not easily affected by the external environment temperature.

[0042] Optionally, the heat insulating panel material may be a laminated glass panel, and the glass panels are sealed and connected by glass glue.

[0043] Optionally, a dynamic sealing structure is provided at the shaft connection between the shaft hole 111 and the anilox roller 20 to be tested. Specifically, the dynamic sealing structure is a polytetrafluoroethylene slip ring and a rubber ring, the polytetrafluoroethylene slip ring is fixed to the inner wall of the shaft hole 111, and the rubber ring is sleeved on the outer wall of the rotating shaft 21 of the anilox roller 20 to be tested.

[0044] The dynamic seal can ensure that the pressure in the test container 10 is stable.

[0045] Preferably, the outer wall of the rotating shaft 21 of the anilox roller 20 to be tested is further provided with a bearing 22, and the bearing 22 is arranged outside the test container 10. This can prevent the heat of the bearing 22 from affecting the temperature atmosphere in the test container 10.

[0046] Furthermore, the test container 10 includes a cover 12 , a sealing gasket is provided between the cover 12 and the body of the test container 10 , and the second side surface is a side surface where the cover 12 or the body of the test container 10 is connected to the first side surface 11 .

[0047] When the cover 12 is opened, the anilox roller 20 and the scraper 30 to be tested can be installed in the test container 10, and a certain amount of alcohol can be injected into the test container 10. When the cover 12 is closed, the test container 10 can be kept in a relatively sealed environment.

[0048] In an optional embodiment, a scraper holder 31 is provided on the second side, and the scraper 30 is configured to be movable on the holder 31 to change the relative position with the anilox roller 20 to be tested. Preferably, a mounting plate 32 is provided between the scraper 30 and the holder 31, and the mounting plate 32 and the holder 31 are fixedly connected by screws.

[0049] In this way, by controlling the position between the scraper 30 and the blade holder 31 , the distance between the scraper 30 and the anilox roller 20 to be tested can be changed. When the distances are different, different friction heat can be generated.

[0050] Combination Figure 2 As shown, the bottom of the test container 10 is provided with an inclined surface 13 , the bottom of the inclined surface 13 is provided with a drain port 14 , and a valve is provided on the drain port 14 .

[0051] The arrangement of the inclined surface 13 can ensure that the alcohol in the test container 10 is completely discharged without any residue, thereby increasing the accuracy of the calculation.

[0052]

Anilox roller friction heat detection method

[0053] The second aspect of the utility model proposes a technical solution, a method for detecting friction heat of anilox roller, using the above-mentioned device for detecting friction heat of anilox roller, comprising the following steps:

[0054] Step 1, installing the anilox roller 20 to be tested and the scraper 30 into the test container 10, and controlling the scraper 30 and the anilox roller 20 to be tested to have a suitable distance;

[0055] Step 2, pouring a first volume of alcohol into the test container 10, and closing the test container 10;

[0056] Step 3, driving the anilox roller 20 to be tested to rotate at a set speed for a predetermined time;

[0057] Step 4, before the rotation stops, the alcohol in the test container 10 is discharged, and the volume of the discharged alcohol is measured and calculated as the second volume;

[0058] The friction heat of the test anilox roller 20 and the scraper 30 is calculated according to the latent heat of vaporization formula Q2=m·r;

[0059] In the formula, m is the mass of evaporated alcohol, r is the latent heat of vaporization, and the latent heat of vaporization of alcohol at normal pressure is 925 kJ / kg.

[0060] The heat released by the friction of the anilox roller 20 and the scraper 30 during the test can be obtained based on the evaporation mass of alcohol ((V1-V2)*ρ1, V1 is the volume of alcohol before the test, and V2 is the volume of alcohol after the test) and the latent heat of vaporization.

[0061] In a specific embodiment, after the anilox roller 20 and the scraper 30 to be tested are installed in the test container 10, a first volume of alcohol is taken with a measuring cylinder and poured into the test container 10, the cover 12 is closed, and the motor is controlled to drive the anilox roller 20 to be tested to rotate at a target speed. The rotation time can be set to 5 minutes or 10 minutes, or determined according to the reduction in alcohol. Finally, the amount of heat generated between the anilox roller 20 and the scraper 30 during the experiment is determined according to the reduction in alcohol.

[0062] Preferably, in step 4, before the alcohol liquid level drops to completely separate from the anilox roller 20 to be tested, the anilox roller 20 to be tested keeps rotating to throw out the alcohol remaining in the meshes of the anilox roller 20 to be tested.

[0063] In this way, the amount of alcohol volatilization can be measured more accurately.

[0064] It should be understood that, according to the above steps, after replacing different anilox rollers for measurement, the difference in heat generated by different anilox rollers 20 and scrapers 30 at the same spacing can be obtained. When the anilox roller is not replaced and the spacing of the scraper 30 is adjusted, the difference in heat generated by different scraper spacings can be obtained, and the specific friction heat of the test anilox roller 20 and scraper 30 can also be calculated according to the latent heat of vaporization formula Q2=m·r.

[0065] In combination with the above embodiments, the present application establishes a relatively sealed environment for the friction process between the anilox roller and the scraper, adopts a volatile solvent instead of ink to adhere to the surface of the anilox roller, drives the anilox roller to rotate to simulate the actual working process, and obtains the volatilization amount of alcohol after the test, thereby obtaining the amount of heat generated by the anilox roller and the scraper in this process. It is particularly suitable for comparing the amount of heat generated by different anilox rollers at the same spacing with the scraper, or comparing the amount of heat generated by the same anilox roller at different spacings with the scraper, which has guiding significance for the production and use of anilox rollers.

[0066] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A device for detecting friction heat of anilox roller, characterized in that: include: A test container (10), wherein the test container (10) is provided with an axial hole (111) for mounting the anilox roller (20) to be tested; A scraper (30) is mounted on the test container (10), and a predetermined distance exists between the scraper (30) and the anilox roller (20) to be tested; A driving component (40) is arranged outside the test container (10) and is used to drive the anilox roller (20) to be tested to rotate at a predetermined rotation speed; The test container (10) is configured as a sealed container, wherein a simulated ink is provided in the test container (10), wherein the simulated ink is a volatile solvent, and after the driving component (40) drives the anilox roller (20) to be tested to rotate for a predetermined time, the heat generated by the friction between the scraper (30) and the anilox roller (20) to be tested is obtained according to the consumption of the volatile solvent.

2. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The test container (10) is formed by splicing heat-insulating plates, and a dynamic sealing structure is provided at the axial connection between the axial hole (111) and the anilox roller (20) to be tested.

3. The device for detecting friction heat of anilox roller according to claim 2, characterized in that: The dynamic sealing structure comprises a polytetrafluoroethylene slip ring and a rubber ring, wherein the polytetrafluoroethylene slip ring is fixed to the inner wall of the shaft hole (111), and the rubber ring is sleeved on the outer wall of the rotating shaft (21) of the anilox roller (20) to be tested.

4. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The outer wall of the rotating shaft (21) of the anilox roller (20) to be tested is also provided with a bearing (22), and the bearing (22) is arranged outside the test container (10).

5. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The test container (10) comprises a cover (12), a sealing gasket is provided between the cover (12) and the body of the test container (10), the anilox roller (20) to be tested is mounted on a first side of the test container (10), and the scraper (30) is mounted on a second side of the test container (10), wherein the second side is a side where the cover (12) or the body of the test container (10) is connected to the first side (11).

6. The device for detecting friction heat of anilox roller according to claim 5, characterized in that: The second side surface is provided with a scraper holder (31), and the scraper (30) is arranged to be movable on the scraper holder (31) so as to change its relative position with the anilox roller (20) to be tested.

7. The device for detecting friction heat of anilox roller according to claim 6, characterized in that: A mounting plate (32) is provided between the scraper (30) and the tool holder (31), and the mounting plate (32) and the tool holder (31) are fixedly connected by screws.

8. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The bottom of the test container (10) is provided with an inclined surface (13), the bottom of the inclined surface (13) is provided with a liquid discharge port (14), and a valve is provided on the liquid discharge port (14).

9. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The liquid surface of the simulated ink is located at the lower half of the anilox roller (20) to be tested.

10. The device for detecting friction heat of anilox roller according to claim 1, characterized in that: The surface of the test container (10) is provided with scales.

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