CN111571885A

CN111571885A - Vulcanizing equipment of ink transfer medium and vulcanizing method and application thereof

Info

Publication number: CN111571885A
Application number: CN202010323421.3A
Authority: CN
Inventors: 徐佳; 徐毛清; 高杰良
Original assignee: Jiangsu Kangpu Printing Technology Co ltd
Current assignee: Jiangsu Kangpu Printing Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-08-25
Also published as: CN113146895A; CN113146896A; WO2021213414A1; CN113146897B; CN113232209A; CN215903840U; CN113146898A; CN113146897A; CN216329488U

Abstract

The invention discloses an air cushion layer for an ink transfer medium, a preparation method and application thereof, wherein the air cushion layer has a fully-closed micropore structure formed by microsphere capsule foaming vulcanized rubber components, and the compression distance of the air cushion layer is 0.12-0.24mm under the load of 1060 Kpa; the compression distance is 0.20-0.24mm under a load of 2060 Kpa. The ink transfer medium provided by the invention is safe and environment-friendly, and has the advantages of good stability, high strength and good rebound resilience, and the printing speed can reach 1.5 ten thousand prints of high-speed printing.

Description

Vulcanizing equipment of ink transfer medium and vulcanizing method and application thereof

Technical Field

The invention belongs to the technical field of printing, and particularly relates to a vulcanizing device of an ink transfer medium, a vulcanizing method and application thereof.

Background

In the field of offset printing, an ink transfer medium can be wound on a transfer cylinder so as to transfer ink on a printing plate to the surface of a printing stock, and the performance requirement of the ink transfer medium is higher and higher along with the development of the printing industry.

The air cushion layer and the surface rubber layer of the ink transfer medium all contain rubber components, therefore the vulcanization process to the rubber components directly influences the use of the ink transfer medium, a very important link, the vulcanization process of the current ink transfer medium is to coat the slurry of the air cushion layer and the surface rubber layer on the substrate layer, the adopted process is a pressure-free foaming vulcanization process, the new calendering process when the air cushion layer and the surface rubber layer are laminated into a sheet and then spliced to the substrate layer is adopted, the bonding force between the cloth layers is solved, certain pressure needs to be applied during vulcanization, the deformation of microspheres in the foaming layer can be caused by improper pressure control, the compressibility of the rubber cloth is influenced, and the product scrapping is caused. Therefore, it is important to provide a vulcanizing device for an ink transfer medium, and a vulcanizing method and use thereof.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a vulcanizing device for an ink transfer medium, which can be applied to a calendaring process for the ink transfer medium, and the vulcanized ink transfer medium has the advantages of strong compression performance, high strength, large interlayer adhesion, ideal flatness, safety and environmental protection.

It is another object of the present invention to provide a method of curing an ink transfer medium.

It is another object of the present invention to provide a use of the apparatus for curing an ink transfer medium in a calendaring process for the ink transfer medium.

To achieve the above and other related objects, a first aspect of the present invention provides a vulcanizing device for an ink transfer medium, comprising: a first vulcanization unit; the second vulcanizing unit is arranged behind the first vulcanizing unit, and comprises a conveying component for conveying the ink transfer medium vulcanized by the first vulcanizing unit; the tensioning assembly is arranged behind the conveying assembly and used for tensioning the ink transfer medium vulcanized by the first vulcanizing unit; the vulcanizing assembly is arranged behind the tensioning assembly and is used for heating and vulcanizing the ink transfer medium vulcanized by the first vulcanizing unit to obtain a second unit vulcanized ink transfer medium; a receiving assembly disposed behind the curing assembly to receive the second unit of cured ink transfer media.

In some embodiments of the present invention, the conveying assembly includes a conveying frame, an unwinding assembly rotatably disposed on the conveying frame, the unwinding assembly includes a deviation rectifier; the compressing assembly is rotatably arranged on the conveying rack and is positioned behind the unreeling assembly, and the compressing assembly comprises a first compressing roller which is rotatably arranged on the conveying rack; the second pressing roller is rotatably arranged on the conveying rack, is positioned below the first pressing roller and has a roller distance of 1-20mm with the first pressing roller; a steering assembly located behind the hold down assembly.

In some embodiments of the present invention, the tensioning mechanism includes a plurality of tensioning rollers rotatably disposed on a tensioning frame.

In some embodiments of the present invention, the vulcanizing device for the ink transfer medium further includes a defoaming assembly disposed between the tensioning assembly and the vulcanizing assembly to eliminate air bubbles in the ink transfer medium after the first vulcanizing unit is vulcanized.

In some embodiments of the present invention, the vulcanizing assembly comprises a vulcanizing frame, a first vulcanizing adjusting roller rotatably arranged on the vulcanizing frame, and a second vulcanizing adjusting roller rotatably arranged on the vulcanizing frame and positioned below the first vulcanizing adjusting roller, wherein the first vulcanizing adjusting roller and the second vulcanizing adjusting roller have a roller spacing of 1-100 mm; the vulcanizing drum is rotationally arranged on the vulcanizing rack, is positioned behind the first vulcanizing adjusting roller and the second vulcanizing adjusting roller, is provided with a heat-conducting steel plate outside an arc surface at one side of the vulcanizing drum, and has a distance of 2-4mm with the vulcanizing drum; the extension roller is rotatably arranged on the vulcanizing rack and is positioned behind the vulcanizing drum; and the power device is arranged on the first vulcanization adjusting roller.

In a second aspect, the present invention provides a method of curing an ink transfer medium, comprising the steps of: carrying out first-stage vulcanization on an ink transfer medium to be vulcanized; carrying out second-stage vulcanization on the ink transfer medium subjected to the first-stage vulcanization, wherein the second-stage vulcanization comprises conveying the ink transfer medium subjected to the first-stage vulcanization; tensioning the first stage cured ink transfer media; heating and vulcanizing the ink transfer medium vulcanized in the first stage to obtain an ink transfer medium vulcanized in a second stage; receiving the second stage cured ink transfer media.

In some embodiments of the invention, the first stage curing comprises transporting the ink transfer medium to be cured; heating and vulcanizing the ink transfer medium to be vulcanized to obtain a first-stage vulcanized ink transfer medium; receiving the first stage cured ink transfer media; wherein the heated curing comprises a plurality of different curing temperatures.

In some embodiments of the invention, the vulcanization temperature of the first stage vulcanization comprises: a first vulcanization temperature, wherein the first vulcanization temperature is 85-100 ℃; a second vulcanization temperature, wherein the second vulcanization temperature is 100-130 ℃; a third vulcanization temperature, wherein the third vulcanization temperature is 130-160 ℃.

In some embodiments of the invention, the vulcanization parameter of the first stage vulcanization is selected from at least one of the following, a pressure of 0 to 8 kg; the time is 5-15 h.

In some embodiments of the invention, the vulcanization parameter of the second stage vulcanization is selected from at least one of the following, temperatures of 140 ℃ to 160 ℃; the pressure is 3-8 kg; the time is 8-24 h.

In a third aspect the invention provides the use of an apparatus for vulcanisation of an ink transfer medium in a calendering process for an ink transfer medium.

As described above, the present invention provides an apparatus and method for curing an ink transfer medium and use thereof. The vulcanizing equipment of the printing ink transfer medium utilizes a plurality of vulcanizing processes to carry out a plurality of times of vulcanizing on the printing ink transfer medium, so that the foaming vulcanization on the air cushion layer of the printing ink transfer medium and the integral vulcanization on the surface rubber layer are respectively realized, and particularly, when the printing ink transfer medium is prepared by adopting a calendering process, the high compression performance, the high strength, the large interlayer adhesive force, the ideal flatness, the safety and the environmental protection of the printing ink transfer medium can be fully ensured. In addition, the residual quantity of the organic solvent of the ink transfer medium containing the air cushion layer provided by the invention is less than or equal to 0.1PPM, the product yield is high, the problems of resource waste and environmental pollution are avoided, the working environment is improved, the stability is good, the strength is high, the rebound resilience is good when the air cushion layer is used, and the printing speed can reach 1.5 ten thousand-print high-speed printing. Other features and advantages may be apparent from the following claims and from the description.

Drawings

FIG. 1 shows a schematic representation of an ink transfer medium provided in accordance with the present invention in use.

FIG. 2 is a schematic structural diagram of an embodiment of an ink transfer medium according to the present invention.

FIG. 3 is a schematic structural diagram of another embodiment of an ink transfer medium according to the present invention.

FIG. 4 is a schematic diagram showing the cell structure of the air-cushion layer in the ink transfer medium provided by the present invention.

FIG. 5 shows an optical microscope photograph at 100 times magnification of a gas cushion layer in an ink transfer medium provided by the present invention.

Fig. 6 shows an optical microscope photograph of the box portion of fig. 5 at 1000 x magnification.

FIG. 7 shows the roughness of a size layer in an ink transfer medium provided in accordance with the present invention.

FIG. 8 is a front view of the appearance of a size layer in an ink transfer medium provided in accordance with the present invention.

FIG. 9 is a schematic structural view of a first vulcanizing unit of the vulcanizing device provided by the present invention.

Fig. 10 shows a schematic structural diagram of a second vulcanizing unit of the vulcanizing device provided by the invention.

FIG. 11 shows a schematic flow diagram of a vulcanization process provided for in the present invention.

FIG. 12 is a schematic flow diagram of the first stage curing process of FIG. 11.

FIG. 13 is a schematic flow diagram of the second stage curing process of FIG. 11.

Detailed Description

The present invention is further illustrated by the following specific examples, but it should be noted that the specific material ratios, process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the scope of the present invention. Note that "%" shown in the description herein means "part by mass" unless otherwise specified.

As used herein, the singular forms "a", "an" and "the" include the plural forms unless the context clearly dictates otherwise. Thus, for example, reference to "a compound" includes a plurality of such compounds, and reference to "a component" or "an additive" means that one or more components or additives, and equivalents thereof, and the like, known to those skilled in the art can be employed.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice of the present invention, the preferred methods, devices, and materials are described below. All publications mentioned herein are intended to describe and disclose the various layers, compounds, compositions, methods, and the like, which are reported in the publications and which may be used in connection with the invention.

As shown in fig. 1, the ink transfer medium 10 may be coated on a transfer cylinder 101 of an offset printing press 100, so that the ink is directly transferred from the surface of the ink transfer medium 10 to the printing material 30 as a medium for ink transfer in a lithographic (offset) process. Specifically, this can be achieved by a process including rotating a transfer cylinder 101 coated with the ink transfer medium 10 in close contact with a plate cylinder 102 having characters and images formed thereon and provided with printing ink, so that the characters and images on the printing plates 20 located at the plate cylinder 102 are transferred onto the ink transfer medium 10, and then the characters and images on the ink transfer medium 10 are (transferred and) positioned on a substrate 30 such as a sheet of paper of an impression roller 103, which is conveyed in close contact with the ink transfer medium 10, to perform printing.

As shown in fig. 2, the ink transfer medium 10 provided by the present invention includes a first substrate layer 11, an air-cushion layer 12, a second substrate layer 13, and a topcoat layer 14. The ink transfer medium 10 is formed as a laminate having a multilayer structure, the first base material layer 11 is an innermost layer and covers the transfer cylinder 101 of the printing press 100, the size layer 14 is an outermost layer, and the ink on the printing plate 20 of the plate cylinder 102 is transferred by adhering to the size layer 14 of the ink transfer medium 10.

Referring to fig. 2, in some embodiments, the first substrate layer 11 includes a first fabric layer 111, a first adhesive layer 112 and a second fabric layer 113, and the first fabric layer 111 and the second fabric layer 113 may have the same or different structures, such as long stapled cotton cloth, hemp cloth, non-woven fabric, and the like. The first adhesive layer 112 is located between the first cloth layer 111 and the second cloth layer 113, and the first adhesive layer 112 may be, for example, an anaerobic adhesive such as butyl acrylate and C2 to C10 alkyl esters of acrylic acid in general; epoxy resins, for example one-component resin adhesives, such as dicyandiamide (cyanoguanidine), or two-component systems using polyfunctional amines or polyfunctional acids as curing agents, or using cyanoacrylates; or a hot melt adhesive such as polyethylene, polyvinyl acetate, polyamide, hydrocarbon resin, resinous material, and wax, and may also be a pressure sensitive adhesive.

Referring to fig. 3, in other embodiments, the first substrate layer 11 may include a first fabric layer 111, a first adhesive layer 112, a second fabric layer 113, a second adhesive layer 114, and a third fabric layer 115, so that a plurality of layers of the ink transfer medium 10 are formed by increasing the number of layers of the first substrate layer 11. The second adhesive layer 114 may, for example, be the same or different structure than the first adhesive layer 112. The third cloth layer 115 may have the same or different structure as the first cloth layer 111 and/or the second cloth layer 113, for example.

Referring next to fig. 2 and fig. 4 to 6, the air cushion layer 12 is located on the first substrate layer 11, and the air cushion layer 12 is a fully-closed micro-porous structure formed by a microsphere capsule foaming vulcanized rubber component, specifically, in some embodiments, the raw material components of the air cushion layer 12 include, for example, the microsphere capsule, the rubber component, and an auxiliary agent. Further, the microcapsules form a fully closed cell structure after vulcanization foaming, the cells are fully closed cells having a diameter of, for example, 1 to 100 μm, further, for example, 5 to 30 μm, for example, 10 μm, 13 μm, the pores are uniform and complete, and the average porosity is 70 to 80%, and the air cushion layer 12 has a compression distance of, for example, 0.12 to 0.24mm under a load of 1060 Kpa; the compression distance is 0.20-0.24mm at a load of 2060Kpa, which ensures that the micro-pores absorb the printing pressure during printing without bulging the surface of the ink transfer medium 10, causing dot deformation, and that the micro-pores are rapidly restored when the printing pressure is removed, so that the pressure during printing is kept substantially constant, and thus, based on the characteristics of the air-bearing layer 12, the printing speed can be up to 1.5 ten thousand prints at a high speed, and further 1.8 ten thousand prints or more, for example, 2 ten thousand prints.

The microspheres may be polyurethane microsphere blowing agents consisting of a polyurethane shell and a gas surrounding it, forming tiny spherical plastic particles which soften when heated and expand the gas inside the shell, allowing the expanded microspheres to increase in volume and be 100% closed and return to their original volume after the pressure is released. The polyurethane microsphere foaming agent has a foaming temperature of, for example, 80-190 ℃ and a diameter of, for example, 0.7-1.4. mu.m, such as 0.8. mu.m, 1 μm. The microspheres may be formed from acrylonitrile or a copolymer of acrylonitrile, and further include isobutane, 2, 4-dimethylbutane, 2-methylpentane, 3-methylpentane, n-hexane, cyclohexane, heptane, isooctane, or any combination thereof in the raw material components of the microspheres, or other suitable polymeric microspheres, such as those prepared by emulsion polymerization, emulsified to obtain polymeric particles, which are then sieved and dried to obtain the microspheres, wherein the average particle diameter of the polymeric particles may be 0.02-0.05mm, such as 0.02-0.05 mm. Sample microspheres of similar average particle size were obtained by sieving, and the effect of particle size non-uniformity on expansion in use of the flexographic plate was limited. In some embodiments, the rubber component may be, for example, acrylonitrile/butadiene rubber (NBR), neoprene (CR), fluoro rubber (FKM), Urethane Rubber (UR), ethylene propylene rubber (EPDM), butyl rubber (IIR), or the like. Based on the problem of improving the balance between the adhesion force between the air cushion layer 12 and the first substrate layer 11 and the second substrate layer 13 and the slurry, the rubber component may be nitrile rubber, and further when the calendering process is applied, the development including speed, temperature and pressure is performed, and the nitrile rubber and other raw material components are mixed and foamed.

In some embodiments, the adjuvants are, for example, vulcanizing agents, antioxidants, reinforcing agents, fillers, plasticizers, and the like. Such as carbon black, white carbon, silica, titanium dioxide, calcium carbonate, colored pigments, clays, and combinations thereof, and reinforcing agents such as zinc stearate and/or zinc oxide.

Specifically, in some embodiments, the air bearing layer 12 comprises, for example, the following components: microspheres, nitrile rubber, nano white carbon or, for example, microspheres, nitrile rubber, nano white carbon, stearic acid, zinc chloride, precipitated calcium carbonate and plasticizer TP-90B. Wherein, for example, two different nitrile rubbers are added, or only one nitrile rubber is added. The microspheres may be obtained, for example, by mixing epoxy resins, acrylic acid and isocyanates and then carrying out a number of post-treatment steps. The light calcium carbonate can improve the performances of the air cushion layer such as hardness and the like.

Referring to fig. 4 to 6, the penetration thickness of the air cushion layer 12 on the first substrate layer 11 is smaller than or equal to the thickness of the first substrate layer 11, which is specifically the penetration of the glue layer slurry of the air cushion layer 12 on the other side of the first substrate layer 11, and is further smaller than the thickness of the first substrate layer 11, for example, the penetration thickness of the air cushion layer 12 on the second fabric layer 113 may be smaller than or equal to the thickness of the second fabric layer 113, specifically, for example, 0mm, 0.06mm, 0.1mm, 0.2mm, and 0.35 mm. When the penetration thickness of the air cushion layer 12 on the first substrate layer 11 is smaller than or equal to the thickness of the first substrate layer 11, and the first substrate layer 11 is taken as the innermost layer, the surface of the first substrate layer 11 is prevented from being uneven due to the penetration of the air cushion layer 12, so that the printing quality is not ideal.

Referring back to fig. 2, the air cushion layer 12 is located between the first substrate layer 11 and the second substrate layer 13, and the interlayer adhesion between the first substrate layer 11 and the second substrate layer 13 should have an adhesive force of 1.5KN/m or more, and further 1.8KN/m or more based on the air cushion layer 12, so that the ink transfer medium 10 is prevented from being broken due to radial stress during use. Specifically, the air bearing layer 12 within the above range can solve the balance between the adhesion and the slurry bleeding, and further, for example, the use of a raw material component containing an organic solvent can be avoided during the production and the application of the air bearing layer 12.

Referring to fig. 2, the second substrate layer 13 is disposed on the air cushion layer 12, and the second substrate layer 13 may include a multi-layer structure formed by a cloth and an adhesive, which has the same structure as the first substrate 11, but may be, for example, only a cloth layer, which has the same structure as the first cloth layer 111, such as a long flannelette cloth, a hemp cloth, a non-woven cloth, and the like, such as a long flannelette cloth.

Referring next to fig. 2 and 7-8, the size layer 14 is disposed on the second substrate layer 13, and the size layer 14 is the outermost layer of the ink transfer medium 10, directly contacting the ink, and transferring it to the substrate 103. The surface of the size layer 14, that is, the surface of the ink transfer medium 10, in some embodiments, from the viewpoint of obtaining the ink transfer medium 10 with hardness, wear resistance, oil erosion resistance, chemical corrosion resistance, and the like, the surface roughness Ra of the size layer 14 is 0.8-1.4um, such as 0.9um, 1.0um, 1.3um, the variation of the section roughness, such as Rz, being 3-5um unevenness is less than or equal to 0.03mm, further, such as less than or equal to 0.02mm, and the shore a hardness is, for example, 70 ° to 85 °, such as 76 °, 78 °, 81 °.

In some embodiments, the raw material components of the surface adhesive layer 14 include a first nitrile rubber and/or a second nitrile rubber, a nanomaterial, zinc chloride, stearic acid, a plasticizer, an anti-aging agent and/or an anti-aging agent white carbon black and/or light calcium carbonate, a first colorant, a second colorant, sulfur, a first accelerator, a second accelerator, and a scorch retarder, and the surface adhesive layer 14 can be obtained by mixing and vulcanizing the raw material components.

The rubber and the nano material form a nano structure, and the nano structure improves the hardness and the wear resistance of the surface rubber layer 14, increases the elasticity, the overall strength and the fatigue resistance, and meets the requirement of high-speed printing. In some embodiments, the nanomaterial comprises a combination of one or more of graphene, carbon nanotubes, and nanosilica. For example, the combination of graphene and nano-silica, for example, the combination of carbon nanotube and nano-silica, for example, the combination of graphene, carbon nanotube and nano-silica, enhances the properties of hardness, wear resistance, and the like of the system, so that the surface adhesive layer 14 has a good ink transfer effect. It should be understood that the cushion layer, the size layer, etc. of the ink transfer medium 10 include rubber components, and the present invention can provide a vulcanizing device for vulcanizing the ink transfer medium 10, and further, it is provided from the viewpoint of obtaining the ink transfer medium 10 structured as above.

Referring to fig. 9 and 10, the present invention provides a vulcanizing device for an ink transfer medium, which includes a first vulcanizing unit C100 and a second vulcanizing unit C200.

Referring next to fig. 9, the first vulcanizing unit C100 includes, for example, a frame C110, an unwinding assembly C120, a heating roller assembly C130, and a winding assembly C140.

Referring to fig. 9, the unwinding assembly C120 is mounted in the frame C110 and can rotate around the frame C110, and specifically, the layer structure of the ink transfer medium, such as the first substrate layer 11, the air cushion layer 12, and the third substrate layer 13, is drawn into the heat roller assembly C130.

Referring to fig. 9, the heat roller assembly C130 is installed in the frame C110 and can rotate around the frame C110, and the heat roller assembly C130 includes a plurality of heating rollers, for example, 16 heating rollers, which have different temperatures therebetween, so as to preheat and vulcanize the air cushion layer 12 in the ink transfer medium, and further draw the air cushion layer to the winding assembly C140 for winding.

Referring to fig. 9, the winding assembly C140 is disposed in the frame C110 and can rotate around the frame C110, specifically, the winding assembly C140 is disposed behind the heating roller C130, the winding assembly C140 includes a speed reduction motor, a driving wheel C141 of the speed reduction motor is connected to a driven wheel C142 through a transmission belt, a winding driving wheel C144 of the driven wheel C143 is connected to a winding driven wheel C145 of the winding mechanism C140 through a transmission belt, and a driving sprocket C146 of the driving wheel C142 is connected to the heating roller assembly C130 through a chain, for example, the driven sprocket and the chain adjusting device of the last two heating roller assemblies C130 form a chain transmission mechanism.

When the first vulcanizing unit C120 is vulcanized, the whole first vulcanizing unit C120 is started, the hot roller assembly C130 is heated to a set temperature and keeps the temperature, then, the motor of the winding assembly C140 is started, and the winding mechanism C140 starts to work. The reducing motor drives the winding mechanism C140 and the hot roller assembly C130 to move through the driving chain wheel C141 and the winding driving wheel C142, the ink transfer medium 10 is vulcanized when passing through the hot roller C140 by the traction of the traction cloth along with the movement of the winding mechanism C140 and the hot roller assembly C130, the ink transfer medium 10 is wound on the winding roller of the winding mechanism C140 through the winding mechanism C140, and the first-stage vulcanization of the ink transfer medium 10 is completed.

Referring next to fig. 10, the second vulcanizing unit C200 includes a conveying assembly C210, a tensioning assembly C220, a vulcanizing assembly C230, and a receiving assembly C240. And the second vulcanizing unit C200 vulcanizes the ink transfer medium vulcanized in the first stage, so as to obtain the finished ink transfer medium 10.

Referring to fig. 10, the conveying assembly C210 includes a conveying frame C211, an unwinding assembly C212, and a pressing assembly C213. In some embodiments, the unwinding assembly C212 is rotatably disposed on the conveying frame C211, and includes a first unwinding roller C212a and a second unwinding roller C212b, the first unwinding roller C212a and the second unwinding roller C212b support the ink transfer medium 10 and draft the ink transfer medium to the first-stage vulcanized ink transfer medium, such as the first substrate layer 11, the air cushion layer 12, the third substrate layer 13, the surface adhesive layer 14, and the pressing assembly C213, a deviation rectifier is mounted on the first unwinding roller C211a to keep the ink transfer medium 10 from deviating during conveying, and further, the conveying assembly C210 includes a separating film.

Referring next to fig. 10, a pressing assembly C213, such as a pneumatic pressing assembly, is located behind the unwinding assembly C212, and in some embodiments, includes a first pressing roller C213a and a second pressing roller C213b, and a second pressing roller C213b is located below the first pressing roller C213a, and has a roller spacing of 1-20mm from the first pressing roller, so that the pressure between the first pressing roller C213a and the second pressing roller C213b can be adjusted, the first-stage vulcanized ink transfer medium is pressed, in particular, the first pressing roller C213a and the second pressing roller C213b have the same structure, such as the diameter of the first pressing roller C213a is 20-100mm, for example 38mm, 50mm, 60mm, 76mm, 89 mm.

Referring next to fig. 10, the hold down assembly C213b is followed by a first turning roll C214 that draws the first stage cured ink transfer medium to the tension assembly C220.

Referring next to fig. 10, a tensioning assembly C220 is positioned behind the transport assembly C210, and more particularly, behind the steering roller C214, and in some embodiments, the tensioning assembly C220 includes a tensioning frame C221 and a tensioning roller C222, and the tensioning roller C222 is rotatably connected to the tensioning frame C221 to tension the first stage cured ink transfer medium, for example, at a tension of 30N/m, particularly for calendered ink transfer media, thereby improving the process stability of the curing and further improving the flatness of the ink transfer medium. In some embodiments, the tension roller C222 comprises a plurality of tension rollers C222, such as 3, 6, 8, 9, and the tension rollers C222 are arranged in parallel, further, staggered up and down, to stretch the ink transfer medium. The tensioning roller C222 is followed by a second diverting roller C215 that draws the first stage cured ink transfer medium to the tensioning assembly curing assembly C230.

Referring next to fig. 10, in another embodiment of the present invention, the second vulcanizing unit C200 may further include a defoaming assembly C250, the defoaming assembly C250 is located between the tensioning assembly C220 and the vulcanizing assembly C30, for example, near the second turning roller C215, and the defoaming assembly C250 is used for defoaming air bubbles in the ink transfer medium.

Referring next to fig. 10, a curing assembly C230 is positioned after the tensioning assembly C220 and further after the defoaming assembly C250. in some embodiments, the curing assembly C230 includes a curing frame C231, a first curing adjustment roller C232, a second curing adjustment roller C233, a curing drum C234, a steel belt C235, an elongation roller C236, and a power unit C237. Specifically, a first vulcanizing adjusting roller C232 is driven to rotate by a power device C237, so that a steel belt C235 drives the vulcanizing drum C234, the second vulcanizing adjusting roller C233 and the elongation roller C236 to rotate, and the ink transfer medium can enter the vulcanizing drum C234 through the second vulcanizing adjusting roller C233 and pass through the vulcanizing drum C234 along the steel belt C235, so that the heating vulcanization of the second stage is performed on the vulcanizing drum C234, wherein a heat conducting steel plate is arranged outside an arc surface on one side of the vulcanizing drum C234, and 2-4mm, such as 2mm, 3mm and 3.5mm, is arranged between the heat conducting steel plate and the vulcanizing drum C234.

Referring next to fig. 10, the receiving assembly C240 is positioned after the curing assembly C230 to receive the ink transfer medium of the second unit curing C200.

Referring next to fig. 11-13, the present invention provides a method of curing an ink transfer medium 10, including but not limited to,

s1, carrying out a first stage vulcanization on the ink transfer medium to be vulcanized;

and S2, performing a second stage vulcanization on the ink transfer medium after the first stage vulcanization.

Referring next to fig. 11 and 12, in step S1, the first stage curing specifically includes, S101, transporting the ink transfer medium to be cured; s102, heating and vulcanizing the ink transfer medium to be vulcanized to obtain a first-stage vulcanized ink transfer medium; s103, receiving the ink transfer medium vulcanized in the first stage.

In step S101, the ink transfer medium to be vulcanized may be, for example, a layer structure of the first substrate layer 11, the air cushion layer 12, and the third substrate layer 13. Further, the first substrate layer 11, the air cushion layer 12 and the third substrate layer 13 may be respectively calendered by a three-roll calender to form independent sheets, and the substrate layer 11, the air cushion layer 12 and the third substrate layer 13 may be formed by calendering and splicing again, wherein parameters of the three-roll calender in the laminating process are, for example, 100-; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. . Therefore, the problem of solvent pollution caused by dissolving the film passing through the air cushion layer 12 in toluene to prepare mucilage and then coating the mucilage on the first substrate layer 11 and the second substrate layer 13 is avoided.

In step S102, the ink transfer medium to be vulcanized is heated and vulcanized to obtain a first-stage vulcanized ink transfer medium. In some embodiments, the vulcanization temperature of the first stage vulcanization comprises: a first vulcanization temperature, said first vulcanization temperature being from 85 to 100 ℃, such as 87 ℃, 90 ℃, 95 ℃; a second vulcanization temperature, wherein the third vulcanization temperature is 100-; a third vulcanization temperature, wherein the third vulcanization temperature is 130-160 ℃, such as 135 ℃, 140 ℃ and 155 ℃. Specifically, different temperatures may be formed on the plurality of heating rollers of the heat roller assembly C130 in the first vulcanizing unit C100 to form the above temperature range, the ink transfer medium is vulcanized in the first stage, the microspheres in the ink transfer medium undergo three-stage foaming in the above range of the vulcanizing process, the thermoplastic shell softens when heated, the gas inside the shell expands, and an infinite number of closed cells having a diameter of 0.001 to 0.05mm, such as 0.01mm, 0.06mm, are generated in the rubber compound of the air cushion layer, the porosity is 70 to 80%, and through the vulcanizing process, the air cushion layer having a thickness of 0.3 to 0.6mm, such as 0.4mm, can be obtained, and vibrated up and down 6.5 to 10 times per second.

In step S102, in some embodiments, the vulcanization pressure of the first stage vulcanization is 0-8kg, such as 0kg, 3kg, 5 kg. Specifically, the roller pitch between the plurality of heating rollers of the heat roller assembly C130 in the first vulcanizing unit C100 can be adjusted to be within the above pressure range, and in particular, the micro-pores of the air cushion layer 12 of the ink transfer medium 10 obtained by calendering are pressed to be small, so that the deformation is small and the micro-pore structure is uniform.

In step S102, in some embodiments, the cure time for the first stage cure is 5-15h, such as 5h, 6h, 8h, 10 h. Specifically, the rotational speed of each roll in the first curing unit C100 can be controlled within the above range, for example, 0.1 to 4 m/min.

In step S104, the first-stage vulcanized ink transfer media 10 is received, resulting in a first-stage vulcanized ink transfer media 10.

Referring next to fig. 11 and 13, in step S2, the second stage curing specifically includes S201 delivering the ink transfer medium after the first stage curing; s202, tensioning the ink transfer medium vulcanized in the first stage; s203, heating and vulcanizing the ink transfer medium vulcanized in the first stage to obtain an ink transfer medium vulcanized in the second stage; s204 receives the ink transfer media vulcanized in the second stage.

In step S201, the ink transfer medium after the first-stage vulcanization may have a layer structure of, for example, the first base material layer 11, the air bearing layer 12, the third base material layer 13, and the surface adhesive layer 14. Further, the size layer 14 may be calendered by a three-roll calender to form an independent sheet, and the size layer 14 may be calendered and spliced again on the layer structure of the first substrate layer 11, the air cushion layer 12, and the third substrate layer 13 rolled after the first-stage vulcanization, where parameters in the laminating process of the three-roll calender are, for example, 100-170 ℃, such as 150 ℃, 162 ℃, 165 ℃; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. . Therefore, the problem of solvent pollution caused by the fact that the film passing through the surface adhesive layer 14 is dissolved in toluene to prepare adhesive cement and then coated on the layer structure of the first substrate layer 11, the air cushion layer 12 and the third substrate layer 13 is solved. Further, the

In step S202, the ink transfer medium after the first stage vulcanization is tensioned, for example, the tension is 30N/m, and specifically, for example, the rotation speed and the roller pitch of each roller in the second vulcanization unit C200 may be adjusted to be within the above range.

In step S203, the ink transfer medium vulcanized in the first stage is heated and vulcanized in step S203 to obtain an ink transfer medium vulcanized in the second stage. In some embodiments, the vulcanization temperature of the second stage vulcanization is 140 ℃ to 160 ℃, e.g., 150 ℃, 155 ℃. In the above range of vulcanization, the rubber component in the top rubber layer 14 can be sufficiently vulcanized, and the strength and hardness thereof can be improved.

In step S203, in some embodiments, the vulcanization pressure of the second stage vulcanization is 3-8kg, such as 4kg, 5kg, 5.5 kg. In particular, the roller spacing of the compacting assembly C213 in said second vulcanisation unit C200 can be adjusted so as to be controlled within the above mentioned pressure ranges.

In step S203, in some embodiments, the curing time of the second stage curing is 8-24h, such as 10h, 15h, 20 h. Specifically, the rotating speed of each roller in the second vulcanizing unit C200 can be adjusted and controlled within the above range, such as 0.1-4M/min.

In step S204, the second-stage vulcanized ink transfer medium 10 is received, and a vulcanized ink transfer medium 10 is obtained.

Accordingly, the present invention provides an apparatus and method for curing an ink transfer medium and use thereof. The vulcanizing equipment of the printing ink transfer medium utilizes a plurality of vulcanizing processes to carry out a plurality of times of vulcanizing on the printing ink transfer medium, so that the foaming vulcanization on the air cushion layer of the printing ink transfer medium and the integral vulcanization on the surface rubber layer are respectively realized, and particularly, when the printing ink transfer medium is prepared by adopting a calendering process, the high compression performance, the high strength, the large interlayer adhesive force, the ideal flatness, the safety and the environmental protection of the printing ink transfer medium can be fully ensured. In addition, the residual quantity of the organic solvent of the ink transfer medium containing the air cushion layer provided by the invention is less than or equal to 0.1PPM, the product yield is high, the problems of resource waste and environmental pollution are avoided, the working environment is improved, the stability is good, the strength is high, the rebound resilience is good when the air cushion layer is used, and the printing speed can reach 1.5 ten thousand-print high-speed printing. Can be widely applied to industrial production.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. An apparatus for curing an ink transfer medium, the apparatus comprising:

a first vulcanization unit;

a second vulcanization unit disposed after the first vulcanization unit, wherein the second vulcanization unit comprises,

the conveying assembly is used for conveying the ink transfer medium vulcanized by the first vulcanizing unit;

the tensioning assembly is arranged behind the conveying assembly and used for tensioning the ink transfer medium vulcanized by the first vulcanizing unit;

the vulcanizing assembly is arranged behind the tensioning assembly and is used for heating and vulcanizing the ink transfer medium vulcanized by the first vulcanizing unit to obtain a second unit vulcanized ink transfer medium;

a receiving assembly disposed behind the curing assembly to receive the second unit of cured ink transfer media.

2. The apparatus for curing an ink transfer medium of claim 1, wherein said transport assembly includes

A conveying machine frame is arranged on the conveying machine frame,

the unwinding assembly is rotatably arranged on the conveying rack and comprises a deviation rectifier;

the compressing assembly is rotatably arranged on the conveying rack and is positioned behind the unreeling assembly, and the compressing assembly comprises a first compressing roller which is rotatably arranged on the conveying rack;

the second pressing roller is rotatably arranged on the conveying rack, is positioned below the first pressing roller and has a roller distance of 1-20mm with the first pressing roller;

a steering assembly located behind the hold down assembly.

3. The apparatus for vulcanizing an ink transfer medium according to claim 1, wherein the vulcanizing device for the ink transfer medium further comprises a defoaming assembly disposed between the tension assembly and the vulcanizing assembly for defoaming air bubbles in the ink transfer medium after the first vulcanizing unit is vulcanized.

4. The apparatus for curing an ink transfer medium of claim 1, wherein the curing assembly comprises,

a vulcanizing machine frame is arranged on the vulcanizing machine frame,

a first vulcanization adjusting roller rotatably arranged on the vulcanization frame,

the second vulcanization adjusting roller is rotatably arranged on the vulcanization rack, is positioned below the first vulcanization adjusting roller and has a roller spacing of 1-100mm with the first vulcanization adjusting roller;

the vulcanizing drum is rotationally arranged on the vulcanizing rack, is positioned behind the first vulcanizing adjusting roller and the second vulcanizing adjusting roller, is provided with a heat-conducting steel plate outside an arc surface at one side of the vulcanizing drum, and has a distance of 2-4mm with the vulcanizing drum;

the extension roller is rotatably arranged on the vulcanizing rack and is positioned behind the vulcanizing drum;

and the power device is arranged on the first vulcanization adjusting roller.

5. A method of curing an ink transfer medium comprising the steps of:

carrying out first-stage vulcanization on an ink transfer medium to be vulcanized;

subjecting the first stage cured ink transfer media to a second stage cure, wherein the second stage cure comprises,

transporting the ink transfer medium after the first stage curing;

tensioning the first stage cured ink transfer media;

heating and vulcanizing the ink transfer medium vulcanized in the first stage to obtain an ink transfer medium vulcanized in a second stage;

receiving the second stage cured ink transfer media.

6. The method of curing an ink transfer medium of claim 5, wherein the first stage curing includes,

conveying the ink transfer medium to be vulcanized;

heating and vulcanizing the ink transfer medium to be vulcanized to obtain a first-stage vulcanized ink transfer medium;

receiving the first stage cured ink transfer media;

wherein the heated curing comprises a plurality of different curing temperatures.

7. The method of curing an ink transfer medium of claim 6, wherein the curing temperature of the first stage curing comprises:

a first vulcanization temperature, wherein the first vulcanization temperature is 85-100 ℃;

a second vulcanization temperature, wherein the second vulcanization temperature is 100-130 ℃;

a third vulcanization temperature, wherein the third vulcanization temperature is 130-160 ℃.

8. The method of curing an ink transfer medium according to any one of claims 5 to 7, wherein the curing parameter of the first stage curing is selected from at least one of the following,

the pressure is 0-8 kg;

the time is 5-15 h.

9. The method of curing an ink transfer medium of claim 5, wherein the curing parameter of the second stage curing is selected from at least one of the following,

the temperature is 140-160 ℃;

the pressure is 3-8 kg;

the time is 8-24 h.

10. Use of an apparatus for the vulcanisation of an ink transfer medium in a calendering process for an ink transfer medium.