Coating removing device and coating removing and setting device

Abstract

The utility model discloses a coating removing device and a coating removing and setting device, the coating removing device is used for removing a deformation layer, the coating removing device comprises a working platform, a heating mechanism and a removing mechanism, and the working platform comprises a feeding mechanism, a working table and a receiving mechanism which are connected in sequence; the heating mechanism is arranged on the workbench, and the heating mechanism can generate a specific environment to enable the film forming matter to generate thermally induced dissociation; and the removing mechanism is arranged on the workbench and behind the heating mechanism, and the removing mechanism is used for removing the deformation layer subjected to volume deformation. According to the coating removing device and the working platform, the working platform can be used for conveying the correction and printing material, the heating mechanism can enable the movable layer to generate thermally-induced dissociation by generating a specific environment, the bonding force, rigidity and strength of the thermally-induced dissociation movable layer are greatly reduced, the removing mechanism can remove the thermally-induced dissociation movable layer, and after the movable layer is removed, the coating removing device can be used for removing the coating. The remaining substrate layer can be reused.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a coating removal device and a coating removal and setting device. Background Technology

[0002] Please see Figure 9 The reusable proofing material includes a base layer and a removable layer stacked together. After the removable layer has printed graphics on its surface, it needs to be removed. The base layer can be reused by repeatedly setting up the removable layer after the removable layer is removed.

[0003] There is currently no suitable equipment available for removing the movable layer.

[0004] Therefore, it is necessary to provide a coating removal device and a coating removal and setting device to solve the above problems. Utility Model Content

[0005] The first aspect of this invention provides a coating removal device.

[0006] A coating removal apparatus for removing a removable layer comprising a film-forming substance, the coating removal apparatus comprising:

[0007] The working platform includes a feeding mechanism, a workbench, and a receiving mechanism connected in sequence;

[0008] A heating mechanism, disposed on the worktable, can induce thermal dissociation of the film-forming substance by creating a specific environment; and

[0009] A removal mechanism is disposed on the worktable and behind the heating mechanism. The removal mechanism is used to remove the removable layer after thermal dissociation.

[0010] In one embodiment, the heating mechanism is a dry heating mechanism or a wet heating mechanism.

[0011] In one embodiment, the dry heating mechanism is selected from any one of infrared heating mechanism, heat pressing mechanism, ultrasonic heating mechanism, and plasma heating mechanism.

[0012] In one embodiment, the wet heating mechanism is selected from any one of a water bath heating mechanism, a steam heating mechanism, or a liquid film heating mechanism.

[0013] In one embodiment, the steam heating mechanism includes a steam hood, inside which a heating device is disposed.

[0014] In one embodiment, an impeller is provided inside the steam hood.

[0015] In one embodiment, a cushioning element is provided at the bottom of the steam hood.

[0016] In one embodiment, the removal mechanism includes a removal section selected from any one of a scraper, a brush, or a high-pressure air spray gun.

[0017] In one embodiment, the scraper has blocking portions at both ends.

[0018] In one embodiment, the number of removal units is multiple.

[0019] In one embodiment, the workbench is served by a conveying mechanism, on which a fixing component is provided.

[0020] In one embodiment, the fixing component includes an electromagnet.

[0021] In one embodiment, a waste removal mechanism is also included, which is disposed on the workbench.

[0022] In one embodiment, a cooling mechanism is also included, which is disposed opposite to the heating mechanism.

[0023] The above-mentioned coating removal device has a working platform that can be used to transport printing materials. The heating mechanism can generate a specific environment to cause thermal dissociation of the removable layer. The adhesion, rigidity and strength of the removable layer that has undergone thermal dissociation are greatly reduced. The removal mechanism can remove the removable layer after thermal dissociation. After removing the removable layer, the remaining base layer can be reused.

[0024] The second aspect of this utility model provides a coating removal and setting device, which includes a coating removal device and a coating setting device. The coating removal device is any one of the coating removal devices provided in the first aspect of this utility model. The coating setting device includes a coating mechanism and a drying mechanism. The coating mechanism and the drying mechanism are disposed above the conveying unit. The coating mechanism is disposed behind the removal mechanism, and the drying mechanism is disposed behind the coating mechanism. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a coating removal device according to one embodiment;

[0026] Figure 2 A three-dimensional structural schematic diagram of a coating removal device according to another embodiment;

[0027] Figure 3 A three-dimensional structural schematic diagram of a coating removal device according to another embodiment;

[0028] Figure 4A three-dimensional structural schematic diagram of a coating removal device according to another embodiment;

[0029] Figure 5 This is a schematic diagram of the fixed component structure according to one embodiment;

[0030] Figure 6 A schematic diagram of the fixed component structure for another embodiment;

[0031] Figure 7 A schematic diagram of the fixed component structure for another embodiment;

[0032] Figure 8 This is a three-dimensional structural diagram of a coating removal and application device according to one embodiment.

[0033] Figure 9 This is a schematic diagram of the proofing material structure for one implementation method. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected" or "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "upper," "lower," "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] The coating removal device and coating removal and setting device will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please see Figure 1 One embodiment of the coating removal device includes a work platform 10, a heating mechanism 20, and a removal mechanism 30.

[0038] The work platform 10 includes a feeding mechanism 11, a worktable 12, and a receiving mechanism 13 connected horizontally in sequence. The work platform 10 is used to continuously convey printing materials, enabling the coating removal device to perform continuous operations.

[0039] The feeding mechanism 11 is used to feed out the proofreading materials so that the proofreading materials can pass continuously through the work platform 10.

[0040] In this embodiment, the proofing material is in single sheet form, and the feeding mechanism 11 is used to continuously feed the stacked proofing material in single sheet form.

[0041] Specifically, the feeding mechanism 11 is a feeder mechanism. Feeder mechanisms are widely used in printing presses, varnishing machines, inkjet printers, calenders, laser transfer machines, hot stamping machines and other equipment, and will not be described in detail here.

[0042] In another implementation, please refer to Figure 3 The proofing material is in the form of a roll. The feeding mechanism 11 includes a feeding roller. When the feeding roller is provided with proofing material in the form of a roll, the feeding roller can release the proofing material by rotating.

[0043] The workbench 12 is located between the feeding mechanism 11 and the receiving mechanism 13. The workbench 12 has a certain length, thereby providing space for the installation and operation of the heating mechanism 20 and the removal mechanism 30. The printing material can move on the workbench 12.

[0044] In this embodiment, please refer to Figure 1 The proofreading material is in single sheet form. A conveying mechanism is provided between the feeding mechanism 11 and the receiving mechanism 13. The conveying mechanism acts as a workbench 12.

[0045] Specifically, the conveying mechanism includes a first support and a conveying section 121. The conveying section 121 can rotate cyclically under the drive of a motor, and single-sheet proofing materials can move to the receiving mechanism 13 along with the conveying section 121.

[0046] Preferably, the conveying mechanism is provided with a fixing component, which is used to fix the proofing material to prevent the proofing material from shifting due to friction during the removal of the movable layer 80, thereby affecting the work efficiency and removal efficiency.

[0047] In this embodiment, please refer to 5. The fixing component includes a support block 124.

[0048] Specifically, the conveying section 121 is a conveyor belt, and it has multiple through holes 1211. A support block 124 is located below the conveying section 121, and it has multiple second through holes 1241. These second through holes 1241 are connected to a suction device, which generates negative pressure within them. When the first through holes 1211 and second through holes 1241 are connected, the first through holes 1211 can adsorb the printing material on the surface of the conveying section 121, thus fixing the printing material. When the first through holes 1211 leave the second through holes 1241, the adsorption effect disappears. Furthermore, the support block 124 also supports the conveying section 121, preventing it from deforming under the action of the removal section, which would affect the removal effect.

[0049] Preferably, the width of the second through hole 1241 is greater than or equal to the distance between two adjacent first through holes 1211, so that during the movement of the conveying part 121, the second through hole 1241 is connected to at least one of the first through holes 1211 at any time.

[0050] In another implementation, please refer to Figure 2 and Figure 6 The fixing components include a suction cup 122 and a pressing roller 123.

[0051] Specifically, the conveying mechanism is a tracked conveying mechanism. The conveying section 121 includes multiple independent conveying plates, each with a groove. A suction cup 122 is installed in each groove. A pressure roller 123 is installed above the conveying section 121. Under the pressure of the pressure roller 123, the back of the proofing material can be adsorbed and fixed by the suction cup 122. When the proofing material enters the end of the conveying section 121, the conveying plate moves downward, while the proofing material continues to move towards the receiving mechanism 13. At this time, the suction cup 122 automatically separates from the proofing material.

[0052] Preferably, the pressing roller 123 is disposed on the side of the conveying section 121 close to the feeding mechanism 11. At this time, the film-forming material in the movable layer 80 has not yet undergone thermal dissociation, and the pressing of the pressing roller 123 will not affect the microstructure of the movable layer 80.

[0053] In another embodiment, the conveyor plate is provided with teeth (not shown in the figure) to hold the printing material in place. Teeth structures are widely used in the conveyor mechanisms of printing machinery and will not be described in detail here.

[0054] In another implementation, please refer to Figure 3 The proofing material is in the form of a roll. A workbench 12 is directly provided between the feeding mechanism 11 and the receiving mechanism 13. The workbench 12 has a flat surface. During operation, the proofing material passes through the upper surface of the workbench 12.

[0055] In another implementation, please refer to Figure 6 The fixing component includes an electromagnet 125, which is disposed on the conveying section 121 and can move with the conveying section 121. When the electromagnet 125 comes into contact with the proofing material, the electromagnet 125 generates a magnetic force; when the electromagnet 125 separates from the proofing material, the magnetic force of the electromagnet 125 disappears. When the proofing material is tinplate, the electromagnet 125 can firmly attract the tinplate material.

[0056] exist Figure 6 In the embodiment shown, the electromagnet 125 is strip-shaped. It should be understood that the shape of the electromagnet 125 may also be block-shaped or other shapes.

[0057] Optionally, the electromagnet 125 may be disposed on the upper surface, lower surface or inside the conveying section 121.

[0058] Optionally, two adjacent electromagnets 125 can be arranged side by side or spaced apart.

[0059] Optionally, the electromagnet 125 includes, but is not limited to, neodymium boron magnets, samarium cobalt magnets, alnico magnets, or iron chromium cobalt magnets.

[0060] The receiving mechanism 13 is used to collect the proofing materials after the removal operation is completed.

[0061] In this embodiment, please refer to Figure 1 The receiving mechanism 13 is a single-sheet receiving mechanism 13. The single-sheet receiving mechanism 13 can collect the single-sheet printing materials into a stacked state. The single-sheet receiving mechanism 13 is widely used in printing machines, varnishing machines, inkjet printers, calendering machines, laser transfer machines, hot stamping machines and other equipment, which will not be described in detail here.

[0062] In another implementation, please refer to Figure 3 The receiving mechanism 13 is a roll receiving mechanism 13, which includes a receiving roller. The receiving roller can rotate to reassemble the printing material into a roll shape.

[0063] The heating mechanism 20 is fixedly installed above the worktable 12. A first gap is provided between the heating mechanism 20 and the worktable 12. The heating mechanism 20 can generate a specific environment to cause the film-forming material to undergo thermal dissociation. Thermal dissociation can significantly reduce the adhesion between the removable layer 80 and the substrate layer 70, thereby allowing it to be removed.

[0064] Specifically, please refer to Figure 9The proofing material includes a base layer 70 and a movable layer 80 stacked together. The movable layer 80 is obtained by drying a thermo-dissociative coating. The thermo-dissociative coating includes a film-forming substance. During the drying process of the thermo-dissociative coating, the molecules of the film-forming substance undergo physical fusion and / or chemical cross-linking to form a movable layer 80 with a three-dimensional network structure. The three-dimensional network structure ensures that the movable layer 80 has strong adhesion, so that it will not fall off from the base layer 70 during proofing operations.

[0065] In this invention, the heating mechanism 20 is a wet heating mechanism or a dry heating mechanism, and the thermal dissociation is thermal swelling dissociation and / or thermal cracking dissociation.

[0066] Optionally, the wet heating mechanism can be selected from any one of a water bath heating mechanism, a steam heating mechanism, and a liquid film heating mechanism. A water bath heating mechanism can provide a water bath heating environment, a steam heating mechanism can provide a steam heating environment, and a liquid film heating mechanism can provide a liquid film heating environment.

[0067] Optionally, the dry heating mechanism is selected from any one of the following: infrared heating mechanism, heat pressing heating mechanism, ultrasonic heating mechanism, and plasma heating mechanism. The infrared heating mechanism provides an infrared heating environment, the heat pressing heating mechanism provides a heat pressing heating environment, the ultrasonic heating mechanism provides an ultrasonic heating environment, and the plasma heating mechanism provides a plasma heating environment.

[0068] In this embodiment, the heating mechanism 20 is a wet heating mechanism, and the thermal dissociation is thermal swelling dissociation.

[0069] Specifically, the heating mechanism 20 is a water bath heating mechanism, which includes a water tank containing high-temperature liquid water. When the film-forming material is an aqueous film-forming material, the printing material is immersed in the water tank. The water bath heating environment can cause the aqueous film-forming material with a three-dimensional network structure in the movable layer 80 to undergo thermal swelling and dissociation. This is because: (1) High temperature will activate and destroy the cross-linking structure of the aqueous film-forming material. Specifically, the energy provided by the wet heating environment can destroy the secondary forces such as hydrogen bonds and van der Waals forces between molecules of the aqueous film-forming material, leading to the loosening of the cross-linking network. Furthermore, if the aqueous film-forming material contains heat-sensitive groups, such as ester groups and ether bonds, the wet heating environment may also cause the chemical bonds of the heat-sensitive groups to break, causing the film structure to collapse. (2) Exposure and swelling of hydrophilic groups. Specifically, under wet heating conditions, the movement of resin chain segments intensifies, and the originally encapsulated hydrophilic groups are re-exposed and bond with water molecules through hydrogen bonds, causing the movable layer 80 to undergo thermal swelling and dissociation. When the thermal swelling and dissociation is limited, the movable layer 80 softens and the adhesion is greatly reduced. When the thermal swelling and dissociation is fully thermal, the movable layer 80 is in a colloidal state. When the degree of swelling exceeds the tolerance limit of the cross-linked network, the movable layer 80 may even gradually dissolve in hot water. Therefore, the movable layer 80 that has undergone thermal swelling and dissociation can be removed by scraping or by dissolving it directly.

[0070] It should be noted that thermo-induced swelling and dissociation only causes the hydrogen bonds of the film-forming substances to break, and thermo-induced swelling and dissociation is partially reversible. When the moisture dries, although the transferable layer 80 can restore the film structure, the adhesion will be greatly reduced.

[0071] Optionally, the temperature of the water bath is 80-100℃, and preferably, the temperature of the water bath is 90-100℃.

[0072] Optionally, the aqueous film-forming substance is selected from at least one of polyurethane resin, acrylic resin, polyvinyl alcohol and its modified resins, polyethylene oxide resin, starch and its derivatives, polyvinylpyrrolidone, and environmentally responsive block copolymers.

[0073] In another embodiment, the heating mechanism 20 is a dry heating mechanism, and the thermally induced dissociation is thermally induced fracture dissociation.

[0074] Specifically, the heating mechanism 20 is an infrared heating mechanism, which is equipped with an infrared heating device that can generate high temperature by emitting infrared rays. When the movable layer 80 contains foamed material, since the foamed material contains heat-sensitive components, when the ambient temperature is higher than the induction temperature of the heat-sensitive components, the heat-sensitive components can release a large amount of gas through decomposition, evaporation, or sublimation. The gas directly or indirectly generates internal stress in the movable layer 80. The internal stress can cause the molecular chains of the film-forming material with a three-dimensional network structure to break, the molecular weight to decrease significantly, and a large number of pores to be generated in the movable layer 80, resulting in volume expansion. This significantly reduces the adhesion between the movable layer 80 and the substrate layer 70, thereby allowing the movable layer 80 to be removed from the substrate layer 70.

[0075] It should be noted that thermally induced decomposition causes the chemical bonds of the film-forming material molecules to break, therefore, thermally induced decomposition is irreversible.

[0076] Optionally, foamed materials can be classified as: physical foamed materials, chemical foamed materials, inorganic foamed materials, environmentally friendly foamed materials, and composite foamed materials.

[0077] Specifically, physically foamed materials include, but are not limited to: volatile liquids, compressed gases, supercritical fluids, foamed microspheres, expanded graphite, vermiculite powder, and expanded hexagonal boron nitride.

[0078] Optionally, the volatile liquid foaming material includes, but is not limited to: pentane (C5H 12 ), butane (C4H) 10 ), dichloromethane (CH2Cl2), HFC-134a. Compressed gas foaming materials include, but are not limited to: nitrogen (N2), carbon dioxide (CO2), and air. Supercritical fluid foaming materials include, but are not limited to: supercritical carbon dioxide (scCO2), supercritical nitrogen (scN2), and supercritical argon (scAr).

[0079] Chemical foaming materials include, but are not limited to: azo foaming materials, sulfonyl hydrazine foaming materials, carbonate foaming materials, hydrazine / acyl hydrazine foaming materials, hydrazine / acyl hydrazine foaming materials, and reactive foaming materials.

[0080] Specifically, azo-based foaming materials include, but are not limited to: azodicarbonamide (AC), azobisisobutyronitrile (AIBN), barium azodicarboxylate (BAB), and azodicarbonate (ADC). Sulfonyl hydrazine-based foaming materials include, but are not limited to: p-toluenesulfonyl hydrazine (TSH), benzenesulfonyl hydrazine (BSH), and diphenyl sulfone-3,3'-disulfonyl hydrazine (DPSH). Carbonate-based foaming materials include, but are not limited to: sodium bicarbonate (NaHCO3), ammonium bicarbonate (NH4HCO3), and ammonium carbonate ((NH4)2CO3). Nitro / nitroso-based foaming materials include, but are not limited to: nitrosopentamethylenetetramine (foaming material H), nitroguanidine (NG), and 2,2'-dinitrobenzene (DNB). Hydrazine / acyl hydrazine-based foaming materials include, but are not limited to: 4,4'-oxobisbenzenesulfonyl hydrazine (OBSH), trihydrazine triazine (THT), and 5-phenyltetrazole (5-PT). Reactive foaming materials include, but are not limited to: water (H2O, polyurethane), hydrogen peroxide (H2O2, rubber foam), and isocyanate self-reactive systems.

[0081] Inorganic foaming materials include, but are not limited to: carbonate foaming materials, metal hydride foaming materials, and silicate foaming materials.

[0082] Specifically, carbonate foaming materials include, but are not limited to: magnesium carbonate (MgCO3), calcium carbonate (CaCO3, endothermic), and zinc carbonate (ZnCO3). Metal hydride foaming materials include, but are not limited to: aluminum hydride (AlH3), magnesium hydride (MgH2), and sodium borohydride (NaBH4). Silicate foaming materials include, but are not limited to: water glass (Na2SiO3) and bentonite.

[0083] Environmentally friendly foaming materials include, but are not limited to: bio-based foaming materials, HFOs foaming materials, and natural product foaming materials.

[0084] Specifically, bio-based foaming materials include, but are not limited to: polylactic acid (PLA) microspheres, starch-based granules, and cellulose foaming materials. HFOs foaming materials include, but are not limited to: HFO-1234ze, HFO-1336mzz, and HFO-1233zd. Natural product foaming materials include, but are not limited to: coconut oil derivatives and soybean oil-based polyols.

[0085] Composite foaming materials include, but are not limited to: endothermic-exothermic composite foaming materials, acid-base reactive foaming materials, and metal-organic composite foaming materials.

[0086] Specifically, endothermic-exothermic composite foaming materials include, but are not limited to: sodium bicarbonate and azodicarbonamide, citric acid and sodium bicarbonate. Acid-base reactive foaming materials include, but are not limited to: calcium carbonate and stearic acid, zinc oxide and stearic acid. Metal-organic composite foaming materials include, but are not limited to: aluminum hydride and polysiloxane, magnesium carbonate and azo compounds.

[0087] It should be noted that during the dry heating process, the following two effects occur simultaneously: Firstly, the high temperature promotes the full cross-linking and curing of the film-forming material in the movable layer 80, forming a dense three-dimensional network structure, thereby enhancing the adhesion of the movable layer 80 to a certain extent. Secondly, the foaming material is tightly wrapped by the highly cross-linked film-forming material in the movable layer 80. When the internal stress is less than the chemical bond energy of the three-dimensional network structure, the movable layer 80 can absorb the internal stress through a certain degree of deformation. When the internal stress is greater than the chemical bond energy of the three-dimensional network structure, the internal stress will directly destroy the three-dimensional network structure, causing the molecular chains of the film-forming material in the movable layer 80 to break, the molecular weight to decrease significantly, and a large number of pores to be generated in the movable layer 80. This significantly reduces the adhesion between the movable layer 80 and the base layer 70, but the movable layer 80 still maintains the integrity of the hierarchical structure. At this time, although the movable layer 80 can be removed, the removal efficiency is low.

[0088] In another embodiment, the heating mechanism 20 is a steam heating mechanism, and the thermal dissociation includes both thermally induced cracking dissociation and thermally induced swelling dissociation.

[0089] Specifically, the steam heating mechanism includes a steam generator and a steam hood, which are connected by a conduit. The steam hood is positioned above the workbench 12. The steam heating mechanism can thermally decompose the movable layer 80 containing foamed material.

[0090] Steam heating environments can produce the following beneficial effects:

[0091] (1) When high-temperature steam acts on the movable layer 80, condensation occurs, releasing a large amount of heat. This causes the temperature of the movable layer 80 to reach 120℃-150℃ in a very short time. This temperature is exactly within the optimal foaming temperature range for most foaming materials. This temperature can induce ultimate internal stress in the foaming material and cause the movable layer 80 to undergo sufficient thermally induced rupture and disintegration. After the proofing printing is completed, a proofing image layer will be placed above the movable layer 80. Sufficient thermally induced rupture and disintegration will cause a large number of pores to be generated in both the movable layer 80 and the proofing image layer. Otherwise, the proofing image layer will prevent water vapor from contacting the movable layer 80. This is especially important when the proofing image layer is a solid color block. Furthermore, this phenomenon is particularly pronounced when the foaming material is a medium- or low-temperature foamed microsphere.

[0092] (2) The limited high-temperature steam provided by the steam heating environment can enter the interior of the movable layer 80 through the pores. The limited high-temperature steam can simultaneously cause limited thermal swelling and dissociation of the aqueous film-forming material on the surface and inside the movable layer 80. The limited thermal swelling and dissociation can destroy the original hydrogen bonds between the molecules of the aqueous film-forming material and combine with water molecules to generate new hydrogen bonds, thereby causing the molecular chain of the aqueous film-forming material with a three-dimensional network structure to break and the molecular weight to be greatly reduced. Externally, this manifests as a significant reduction in the adhesion, rigidity and strength of the movable layer 80 while maintaining its hierarchical structure. The significant reduction in the adhesion, rigidity and strength of the movable layer 80 can greatly increase the thermal cracking and dissociation caused by internal stress. Therefore, under the dual dissociation effect of full thermal cracking and dissociation and limited thermal swelling and dissociation, the movable layer 80 is finally disintegrated into powder polymerized by low adhesion. The powder polymerized by low adhesion can be easily removed by scraping or adsorption, thereby greatly enhancing the removal efficiency of the movable layer 80.

[0093] It should be understood that when the steam heating time is excessive, the liquid water produced by the condensation of water vapor continues to increase, and therefore, the movable layer 80 can also undergo sufficient thermal swelling and dissociation. Therefore, the ideal steam heating time is 2-5 seconds.

[0094] It should be noted that the disintegration phenomenon generated by limited thermal swelling and disintegration and full thermal rupture is something that dry heating cannot achieve, nor can other wet heating methods, and is something that existing foaming processes need to avoid as much as possible.

[0095] (3) Steam heating has fast heat conduction and short time consumption, and can significantly reduce the deformation of the substrate layer 70. Comparative experiments show that in order to cause thermal dissociation of the movable layer 80, steam heating takes 2-3 seconds, water bath heating takes 3-5 seconds, hot pressing heating takes 6-8 seconds, and infrared heating takes 30-120 seconds.

[0096] (4) The movable layer 80 obtained by steam heating has a high moisture content and is polymerized together with low adhesion. Therefore, dust pollution will not be generated during the cleaning operation.

[0097] (5) Steam heating does not produce wastewater and is environmentally friendly.

[0098] Preferably, a heating device is installed inside the steam hood. When high-temperature steam enters the steam hood from the conduit, its volume increases rapidly and its pressure decreases significantly. Therefore, the high-temperature steam will begin to condense into water droplets and release heat inside the steam hood. This will lead to three consequences: First, when the steam travels a certain distance to reach the surface of the movable layer 80, the temperature will drop significantly, which will greatly reduce the thermally induced dissociation efficiency of the movable layer 80. Second, the size of the water droplets is positively correlated with the distance the steam travels inside the steam hood. Therefore, when the water droplets are too large, a water film will form on the surface of the movable layer 80. On the one hand, the water film will inhibit the temperature rise and affect the thermally induced dissociation efficiency; on the other hand, the water film will promote the thermally induced swelling and dissociation of the movable layer 80, ultimately causing the movable layer 80 to exist in a state where solid and emulsion coexist, affecting the removal effect of the movable layer 80. Third, water droplets will accumulate on the inner wall of the steam hood and eventually drip onto the surface of the movable layer 80 under the action of gravity, affecting the thermally induced swelling and dissociation effect of the movable layer 80. This phenomenon is particularly obvious in winter. Therefore, by installing a heating device inside the steam hood to maintain a high temperature inside the steam hood and prevent high-temperature steam from condensing inside the steam hood, it is beneficial to improve the efficiency and effect of thermal dissociation.

[0099] Preferably, an impeller is provided inside the steam hood, and the rotation of the impeller can make the water vapor evenly dispersed inside the steam hood.

[0100] Preferably, a buffer element with multiple mesh openings is provided at the bottom of the steam hood, thereby maintaining a relatively closed space inside the steam hood. After the high-temperature steam enters the steam hood through the conduit, it is buffered and dispersed within the steam hood by the barrier effect of the buffer element, and finally sprayed out evenly from the multiple mesh openings, thus acting uniformly on the surface of the movable layer 80 and maintaining the consistency of thermally induced dissociation of the movable layer 80. During operation, the size of the water droplets condensed from the high-temperature steam can be adjusted by adjusting the size of the first gap.

[0101] Optionally, the buffer is a high-temperature resistant sponge or a high-temperature resistant fiber cloth. The dense mesh in the sponge or fiber cloth can significantly reduce the movement speed of high-temperature steam, thereby improving the heat absorption efficiency of the movable layer 80.

[0102] In another embodiment, wet heating is liquid film heating. The heating mechanism 20 includes a flexible adsorbent material containing high-temperature liquid water. When the flexible adsorbent material comes into contact with the printing material, a high-temperature liquid film can be formed on the surface of the movable layer 80. The high-temperature liquid film can heat the movable layer 80 and cause thermal dissociation of the movable layer 80.

[0103] Liquid film heating combines the advantages of both water bath heating and steam heating. Furthermore, compared to water bath heating, liquid film heating does not produce wastewater, and compared to steam heating, it reduces heat loss, making it energy-efficient and environmentally friendly.

[0104] Optionally, the absorbent material includes, but is not limited to, sponges and velvet.

[0105] The removal mechanism 30 is located above the worktable 12 and is positioned behind the heating mechanism 20 along the direction of movement of the printing material. The removal mechanism 30 is used to remove the removable layer 80 after thermal dissociation.

[0106] Specifically, the removal mechanism 30 includes a second support and a removal part. The second support is fixedly mounted on the worktable 12, and the removal part is connected to the second support. A second gap is provided between the removal part and the worktable 12, and the spacing of the second gap is adjustable to accommodate proofing materials of different thicknesses. When the proofing material passes through the second gap, the removal part can move past the thermally dissociated material except for thermally dissociated materials.

[0107] It should be understood that the position of the removal unit is relative. When the movable layer 80 of the proofing material is set upward, the removal unit is set above the worktable 12. When the movable layer 80 is set downward, the removal unit can be set below the worktable 12, as long as the removal unit is set towards the movable layer 80.

[0108] In this embodiment, the removal part is a scraper. When the scraper comes into contact with the base layer 70 of the proofing material, the removable layer 80 can be removed by the friction between the scraper and the base layer 70.

[0109] Optionally, the scraper blade is made of a hard material. Optionally, hard materials include, but are not limited to: metal, glass, wood, plastic, marble, or ceramic.

[0110] Preferably, the blade body is made of a flexible material to prevent damage to the substrate layer 70. Optionally, the flexible material includes, but is not limited to, silicone, rubber, sponge, or velvet.

[0111] Preferably, the scraper has upwardly protruding blocking parts at both ends. The blocking parts are used to prevent the residue of the removable layer 80 after removal from overflowing to both ends of the scraper and falling onto the worktable 12.

[0112] Optionally, the scraper is U-shaped or V-shaped. The U-shaped or V-shaped scraper can cause the residue of the removed removable layer 80 to gather towards the center, thereby facilitating the removal of the residue of the removable layer 80.

[0113] In another embodiment, the removal part is a brush. The proofing material obtained by heating in a water bath has a colloidal removable layer 80, which can be easily removed by the brush.

[0114] In another embodiment, the removal part is a high-pressure air spray gun. The proofing material obtained by steam heating, the removable layer 80 disintegrates into powder polymerized by low adhesion, and the removable layer 80 can be easily removed by the high-pressure air spray gun.

[0115] In another embodiment, there are multiple removal units. By setting multiple removal units, it is beneficial to improve the removal effect of the movable layer 80.

[0116] Preferably, the removal unit can automatically adjust the distance between itself and the proofing material. When the proofing material is in single sheet form, after the removal of the movable layer 80 of the previous proofing material is completed, the distance between the removal unit and the proofing material automatically increases, thereby preventing the removal unit from contacting the cross section of the next proofing material and hindering the movement of the proofing material. When the cross section of the proofing material passes under the removal unit, the removal unit automatically resets and begins to remove the movable layer 80 of the next proofing material.

[0117] In another embodiment, the coating removal device further includes a waste removal mechanism 40, which is disposed on the platform. The waste removal mechanism 40 can promptly remove the residue of the removable layer 80 after peeling, preventing the residue from accumulating in front of the removal section. The location of the waste removal mechanism 40 is determined according to the location where the residue of the removable layer 80 is generated.

[0118] Optionally, the waste removal mechanism 40 can be a brush, an air spray gun, or a negative pressure adsorption mechanism.

[0119] In another implementation, please refer to Figure 4 The coating removal device also includes a cooling mechanism 21, which is disposed on the platform and located below the heating mechanism 20. The cooling mechanism 21 can cool the lower surface of the proofing material. When the base layer 70 of the proofing material contains a low-melting-point material (such as a PE film layer or a PP film layer), by providing the cooling mechanism 21, the low-melting-point material can be prevented from deforming during the heating process of the heating mechanism 20, thus providing cooling protection for the low-melting-point material.

[0120] Optionally, the cooling mechanism 21 may be cooled by methods including but not limited to: air cooling, liquid cooling, or contact cooling.

[0121] exist Figure 4 In the embodiment shown, the cooling mechanism 21 is liquid cooling. Specifically, the cooling mechanism 21 includes a low-temperature water tank, in which cooling water and a sponge are provided. The surface of the sponge is flush with the workbench 12, and the height of the cooling water is slightly lower than the workbench 12. When the lower surface of the proofing material comes into contact with the sponge, the water in the sponge can conduct away the heat in time, thereby preventing the low melting point material from deforming due to excessive temperature.

[0122] In an optional embodiment, the cooling mechanism 21 is a contact cooling system. Specifically, the cooling mechanism 21 includes a metal box containing a low-temperature coolant, thereby maintaining a low surface temperature on the metal box. When the lower surface of the proofreading material contacts the surface of the metal box, the lower surface of the proofreading material can maintain a low temperature through this contact. Contact cooling ensures that the lower surface of the proofreading material remains dry.

[0123] It should be understood that the location of the cooling mechanism 21 is relative. When the heating mechanism 20 is located above the worktable 12, the cooling mechanism 21 is located below the worktable 12. When the heating mechanism 20 is located below the worktable 12, the cooling mechanism 21 is located above the worktable 12. As long as the cooling mechanism 21 is located on the opposite side of the heating mechanism 20, it is acceptable.

[0124] In the above-mentioned coating removal device, the working platform 10 can be used to transport the printing material, and the heating mechanism 20 can generate a specific environment to cause the removable layer 80 to undergo thermal dissociation. The adhesive force, rigidity and strength of the removable layer 80 that has undergone thermal dissociation are greatly reduced. The removal mechanism 30 can remove the removable layer 80 after thermal dissociation. After removing the removable layer 80, the remaining base layer 70 can be reused.

[0125] Please see Figure 8 One embodiment of the coating removal and application apparatus includes a coating removal device and a coating application device, wherein the coating removal device can be any of the aforementioned coating removal devices. The coating application device includes a coating mechanism 50 and a drying mechanism 60.

[0126] Specifically, the coating mechanism 50 is positioned above the worktable 12 and behind the removal mechanism 30 along the direction of movement of the printing material. The drying mechanism 60 is positioned above the worktable 12 and behind the coating mechanism 50 along the direction of movement of the printing material.

[0127] After the removable layer 80 is removed by the coating removal device, the coating mechanism 50 can directly apply the thermo-dissociative coating onto the base layer 70. The drying mechanism 60 can dry the thermo-dissociative coating. After the thermo-dissociative coating is dried, a new proofing material is obtained, which can be used again for proofing printing.

[0128] Optionally, the drying mechanism 60 can be used for infrared drying or hot air drying.

[0129] Specifically, when the printing ink is a non-penetrating drying ink, the drying mechanism 60 dries the movable layer 80 into a film. When the printing ink is a penetrating drying ink, the drying mechanism 60 causes the movable layer 80 to undergo thermally induced cracking and dissociation. Preferably, the thermally induced cracking and dissociation is limited thermally induced cracking and dissociation.

[0130] The following are specific examples.

[0131] Example 1

[0132] The first aspect of this embodiment provides a coating removal device; please refer to [link to relevant documentation]. Figure 1 The coating removal device includes a working platform 10, a heating mechanism 20, and a removal mechanism 30. The working platform 10 includes a feeding mechanism 11, a workbench 12, and a receiving mechanism 13 connected in sequence. The heating mechanism 20 and the removal mechanism 30 are located above the workbench 12, and the removal mechanism 30 is located behind the heating mechanism 20. The removal mechanism 30 includes a removal part.

[0133] In this embodiment, the feeding mechanism 11 is a feeder, the receiving mechanism 13 is a single sheet receiving mechanism, the worktable 12 is a conveying mechanism, the heating mechanism 20 is a water bath heating mechanism, and the removal part is a brush.

[0134] The above-mentioned coating removal device can be used to remove single-sheet proofing material containing aqueous film-forming substances from the removable layer 80. The work platform 10 can be used to transport the proofing material. The water bath environment of the heating mechanism 20 can cause the aqueous film-forming substances with a three-dimensional network structure in the removable layer 80 to undergo thermal swelling and dissociation. The removal mechanism 30 can remove the removable layer 80 after thermal swelling and dissociation. After removing the removable layer 80, the remaining base layer 70 can be reused.

[0135] Please see Figure 8 The second aspect of this embodiment also provides a coating removal and setting device, which includes a coating removal device and a coating setting device. The coating removal device is the same as the coating removal device provided in the first aspect of this embodiment. The coating setting device includes a coating mechanism 50 and a drying mechanism 60. The coating mechanism 50 is disposed above the worktable 12 and is located behind the removal mechanism 30 along the direction of movement of the printing material. The drying mechanism 60 is disposed above the worktable 12 and is located behind the coating mechanism 50 along the direction of movement of the printing material.

[0136] After the removable layer 80 of the proofing material is removed by the coating removal device, the coating mechanism 50 can directly apply the thermo-dissociative coating onto the base layer 70. The drying mechanism 60 can dry the thermo-dissociative coating. After the thermo-dissociative coating is dried, a new proofing material is obtained, which can be used again for proofing printing.

[0137] Example 2

[0138] This embodiment provides a coating removal device. Please refer to [link / reference]. Figure 2 and Figure 5The coating removal device is similar to the coating removal device provided in Example 1, except that: (1) a fixing component is provided on the conveying mechanism, the fixing component includes a support block 124, a plurality of first through holes 1211 are provided on the conveying part 121, a plurality of second through holes 1241 are provided on the support block 124, the width of the second through hole 1241 is greater than the distance between two adjacent first through holes 1211, and the second through hole 1241 is connected to the suction device; (2) the heating mechanism 20 is a steam heating mechanism; (3) a negative pressure adsorption mechanism is provided on the side of the removal mechanism 30 near the heating mechanism 20.

[0139] The aforementioned coating removal device can be used to remove sheet-like proofing material containing foamed material from the removable layer 80. The fixing component can adsorb and fix the proofing material, preventing it from shifting under friction during the removal of the removable layer 80, thus affecting the work efficiency and removal efficiency. In addition, the heating mechanism 20 uses steam heating, which allows the removable layer 80 to undergo both sufficient thermal cracking and limited thermal swelling dissociation simultaneously. Under the dual dissociation action of sufficient thermal cracking and limited thermal swelling dissociation, the removable layer 80 ultimately disintegrates into powder polymerized by low adhesion. The powder polymerized by low adhesion can be easily removed by scraping or adsorption, thereby greatly enhancing the removal efficiency of the removable layer 80.

[0140] Example 3

[0141] This embodiment provides a coating removal device. Please refer to [link / reference]. Figure 2 and Figure 6 The coating removal device is similar to the coating removal device provided in Example 2, except that: (1) the fixing component includes a suction cup 122 and a pressing roller 123; (2) the heating mechanism 20 is an infrared heating mechanism and the removal part is a scraper.

[0142] In this embodiment, the conveying unit 121 includes multiple conveying plates, each with a plurality of grooves, and a plurality of suction cups 122 are disposed in the grooves. The pressing roller 123 is disposed on the side of the conveying mechanism close to the feeding mechanism 11.

[0143] The coating removal device described above can be used to remove single-sheet proofing material containing foam material from the removable layer 80. When the proofing material enters the conveying section 121, the back side of the proofing material can be adsorbed and fixed under the action of the pressing roller 123. By fixing the proofing material, the removal mechanism 30 can prevent the proofing material from shifting when removing the removable layer 80.

[0144] Example 4

[0145] This embodiment provides a coating removal device. Please refer to [link / reference]. Figure 7The coating removal device is similar to the coating removal device provided in Example 2, except that: (1) the fixing component includes an electromagnet 125; and (2) the removal part is a scraper.

[0146] In this embodiment, the electromagnet 125 is a neodymium boron magnet. The electromagnet 125 is disposed on the outer surface of the conveying section 121 and can move with the conveying section 121. When the electromagnet 125 comes into contact with the proofing material, the electromagnet 125 generates a magnetic force; when the electromagnet 125 separates from the proofing material, the magnetic force disappears. When the proofing material is tinplate, the electromagnet 125 can firmly attract the tinplate material.

[0147] Example 5

[0148] This embodiment provides a coating removal device; please refer to [link to relevant documentation]. Figure 3 The coating removal device includes a working platform 10, a heating mechanism 20, and a removal mechanism 30. The working platform 10 includes a feeding mechanism 11, a worktable 12, and a receiving mechanism 13. The heating mechanism 20 and the removal mechanism 30 are disposed above the worktable 12, and the removal mechanism 30 is disposed behind the heating mechanism 20. The removal mechanism 30 includes a removal part.

[0149] In this embodiment, the proofing material is in the form of a roll, the feeding mechanism 11 includes a feeding roller, the receiving mechanism 13 includes a receiving roller, the heating mechanism 20 uses steam heating, and the removal part is a scraper.

[0150] The aforementioned coating removal device can be used to remove coatings from roll-shaped proofing materials.

[0151] Example 6

[0152] This embodiment provides a coating removal device; please refer to [link to relevant documentation]. Figure 4 The coating removal device is similar to the coating removal device of Example 4, except that a cooling mechanism 21 is provided below the heating mechanism 20.

[0153] When the base layer 70 of the printing material contains a low-melting-point material, the above-mentioned coating removal device can prevent the low-melting-point material from deforming during the heating process of the heating mechanism 20 by setting a cooling mechanism 21, thereby cooling and protecting the low-melting-point material.

[0154] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A coating removal apparatus for removing a removable layer, the removable layer comprising a film-forming substance, characterized in that, The coating removal device includes: The working platform includes a feeding mechanism, a workbench, and a receiving mechanism connected in sequence; A heating mechanism, disposed on the worktable, can induce thermal dissociation of the film-forming substance by creating a specific environment; and A removal mechanism is disposed on the worktable and behind the heating mechanism. The removal mechanism is used to remove the movable layer after thermal dissociation.

2. The coating removal device according to claim 1, characterized in that, The heating mechanism is either a dry heating mechanism or a wet heating mechanism.

3. The coating removal device according to claim 2, characterized in that, The dry heating mechanism is selected from any one of the following: infrared heating mechanism, heat pressing heating mechanism, ultrasonic heating mechanism, and plasma heating mechanism.

4. The coating removal device according to claim 2, characterized in that, The wet heating mechanism is selected from any one of a water bath heating mechanism, a steam heating mechanism, or a liquid film heating mechanism.

5. The coating removal apparatus according to claim 4, characterized in that, The steam heating mechanism includes a steam hood, and a heating device is installed inside the steam hood.

6. The coating removal apparatus according to claim 5, characterized in that, An impeller is installed inside the steam hood.

7. The coating removal apparatus according to claim 5, characterized in that, The bottom of the steam hood is equipped with a cushioning element.

8. The coating removal apparatus according to claim 1, characterized in that, The removal mechanism includes a removal section, which is selected from any one of a scraper, a brush, or a high-pressure air spray gun.

9. The coating removal apparatus according to claim 8, characterized in that, The scraper has blocking parts at both ends.

10. The coating removal apparatus according to claim 8 or 9, characterized in that, The number of removal sections is multiple.

11. The coating removal apparatus according to claim 1, characterized in that, The workbench is served by a conveying mechanism, which is equipped with fixed components.

12. The coating removal apparatus according to claim 11, characterized in that, The fixing component includes an electromagnet.

13. The coating removal apparatus according to claim 1, characterized in that, It also includes a waste removal mechanism, which is set on the workbench.

14. The coating removal apparatus according to claim 1, characterized in that, It also includes a cooling mechanism, which is disposed opposite to the heating mechanism.

15. A coating removal and application device, characterized in that, The device includes a coating removal device and a coating setting device. The coating removal device is the coating removal device according to any one of claims 1-14. The coating setting device includes a coating mechanism and a drying mechanism. The coating mechanism and the drying mechanism are located above the worktable. The coating mechanism is located behind the removal mechanism, and the drying mechanism is located behind the coating mechanism.

Images