WO2016101109A1

WO2016101109A1 - Extrusion transfer coating method

Info

Publication number: WO2016101109A1
Application number: PCT/CN2014/094545
Authority: WO
Inventors: 周友元
Original assignee: 周友元
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2016-06-30

Abstract

An extrusion transfer coating method, comprising the following steps: providing extrusion transfer coating equipment comprising an upper extrusion roller (70) and a lower extrusion roller (71) that roll synchronously; providing a coating liquid; providing a transfer medium (3); and transferring, wherein the coating liquid is sandwiched between the base material (1) and the transfer medium (3), and forms a coating film layer between the transfer medium (3) and the base material (1) under the effect of extrusion force between the upper extrusion roller (70) and the lower extrusion roller (71), and the coating film layer is solidified to attach to the surface of the base material (1). The method is applicable to the technical field of coating of polymeric functional films; by sandwiching the coating liquid between the transfer medium (3) and the base material (1) and forming the coating film layer through transfer treatment, the method aims to solve the problems that an existing coating technology needs to adopt a diluent so as to generate potential safety hazard and can only carry out single-function coating; the cost is greatly reduced.

Description

Extrusion transfer coating method

Technical field

The invention belongs to the technical field of coating of polymer functional films, and in particular relates to an extrusion transfer coating method.

Background technique

The coating technology is to attach one or more layers of materials with specific functions to the surface of the substrate to improve the surface function of the substrate or to protect the substrate, enhance the utilization value of the substrate, or directly utilize the surface characteristics of the coating to Conducive to subsequent processing or to mention the value of a product. Common coating techniques include leaching coating technology, cold transfer printing technology and roll coating technology. Roll coating technology is further divided into film roll coating technology and flat sheet roll coating technology.

The leaching coating technology coats the plate with a leaching coating device, as shown in Fig. 1, the leaching coating device includes a C-type spreader 2' for holding the plate 1', and a hanging C-type spreader 2 a suspension chain conveyor line 4' having a suspension chain 3' for driving the sheet 1', a spray nozzle 5' disposed under the C-type spreader 2' and located on both sides of the sheet 1', and being disposed on the sheet 1 The liquid return tank 6' directly below, the spray pump 7' which is connected to the spray nozzle 6' and which supplies the paint 8', and the storage tank 9' which is in communication with the spray pump 7' and which is used for storing the paint 8'. During the coating process, the sheet 1' is held by a clamp on a C-type spreader 2' hanging from a suspension chain, the C-type spreader 2' being towed by a suspension chain 3' conveyor, and the sheet 1' is subsequently operated; Two spray coating nozzles 5' are disposed at an appropriate height above the sheet 1', and one surface of the sheet material 1' or the two sides of the sheet material 1' is sprayed with the polymer coating 8' by the spray coating nozzle; the coating 8' is made of The coating pump 7' is supplied, and the coating 8' which is sprayed on the surface of the plate 1' is slowly leveled from top to bottom, and finally forms a coating film layer close to the mirror surface; after photocuring or heat curing, on the surface of the plate 1' A hard coating film is formed. However, the leaching coating technology has the following technical defects: (1) The environmental pollution is heavy, and the amount of organic volatile matter is large. Due to the need of coating leveling, the coating liquid needs to add 75% to 80% of an organic solvent as a diluent. Each coating of 1 square meter has 60~80 ml of organic solvent to be completely volatilized into the atmosphere; (2) there are serious safety hazards, and the spray coating uses a large amount of organic thinner, which has a very low flash point. Flammable products; (3) Equipment with large floor space, high energy consumption, low efficiency, daily (8 hours) coating production capacity of 1000m2, minimum need of 500m2 more than 10,000 level purification workshop, the entire production line The minimum power consumption is 150kw/hour, the on-site operator needs at least 10 people, and the coating cost per square meter reaches 20 yuan or more; (4) The quality is unstable: the quality of the product is directly affected by temperature, humidity and cleanliness. The quality is difficult to control, the thickness of the film layer is not uniform, and the film thickness is as thin as 3 micrometers and the thickness is up to 20 micrometers in an area of one square meter, so that the surface hardness, impact strength and yellowness of the film layer are greatly different; 5) Product list The production line can only be coated with a mirror anti-scratch layer; (6) The product yellowing is serious, in order to overcome the phenomenon of "oxygen inhibition" in the UV curing process, the only way is to increase the UV irradiation power, and inevitably make the plastic substrate The yellowing index exceeded the standard.

Cold transfer technology mainly uses chemical etching, laser engraving or other engraving process to create the desired pattern on the surface of mirror metal or glass plate, including dot-like, linear patterns (called transfer templates). ). Specifically, uniformly coating a layer of photocurable polymer coating on the transfer template; attaching the transparent plastic sheet or film to the metal or glass plate coated with the polymer coating; and making the transparent plastic sheet or film and the transfer template Intercoating, uniform thickness, no bubbles, no wrinkles; UV light source is irradiated vertically until solidified; the plastic plate or film is separated from the transfer template; the pattern on the transfer template (including the mirror surface) is completely transferred to the plastic plate or On the coating of the film. However, the cold transfer technology has the following defects: (1) the product has a small format, the transfer template for cold transfer does not exceed 400x600mm; (2) the production efficiency is very low, and the plastic sheet with a thickness of 0.8mm or less is on average per person ( 8 hours) the output does not exceed 20m2 / day; (3) more than 1mm thick sheet, the transfer quality is uncontrollable, the yield rate does not exceed 70%.

The film roll coating technique is to coat a sheet material by a roll coating apparatus. As shown in FIG. 2, the roll coating apparatus includes a storage tank 30′′ for storing a coating liquid 3′′, and is disposed at the same. An applicator roll 6" above the hopper 30" for lifting the coating liquid 3", an over-package disposed above the applicator roll 6" and rotating in the opposite direction from the applicator roll 6" The transfer roll 1", the rubberized back roll 7" which cooperates with the rubber transfer transfer roll 1", and the unwinding device 4" and the winding device 5" which transport the film 2". At the time of coating, the rubber transfer transfer roll 1" is coated with a coating liquid 3", rolled on the surface of the plastic film 2", and the coating liquid 3" is uniformly coated on the surface of the film 2", and conveyed by the take-up/unwind device 4", 5" After the coating leveling A, heating baking B, UV curing C to form a crosslinked cured film layer, the coating curing process is completed. The film roll coating technology has the following defects: (1) heavy environmental pollution and large organic emissions. Because of the process requirements, the coating liquid must be added with 65~70% organic solvent as a diluent, one coating per coating. The amount of organic solvent volatilized by 40-60 ml of organic solvent is volatilized by 90 liters of organic solution per hour according to the output of 30 m2/min; (2) potential safety hazard, the diluent in the coating liquid is all flammable and explosive organic solvent; (3) The equipment structure is complex, the floor space is large, the investment capital is large, and the energy consumption is large. The whole process is divided into: unwinding → corona → coating → hot air baking → UV curing → winding, the size of the equipment needs to be reached. It is 25 meters long, 1.8 meters wide and 2.6 meters high. The total area is about 500m2. The area of the purification workshop above 10,000 is more than 300m2. The power of constant temperature and humidity air conditioning is not less than 40kw, and the power consumption is above 200kw/n. (4) The product is single, the quality is difficult to control, only the film roll of 0.38mm thickness or less can be coated, only the mirror surface can be coated with a functional film; (5) the quality is difficult to control, because it is flat coating, The coating film layer is easily dusted before curing In addition, temperature, humidity, cleanliness very large impact on product quality, difficult to ensure consistency of quality.

The flat sheet roll coating technique (shown in FIG. 3) is to precisely and quantitatively add a coating liquid 3'" between the coating roll 1"" and the coating roll 2"", the coating roll 1' "The coating roll 2'" is covered with a thick and uniform coating liquid 3"" during the rolling process, when the sheet 4"" is conveyed through the coating roll 2" at the conveyor 5"" When it is evenly coated with a coating liquid, UV cured to form a crosslinked cured film layer to complete the coating curing process. However, this flat sheet roll coating technology has the following defects: (1) the quality of the coating is poor, the coating liquid has no organic solvent, the viscosity is relatively high, the leveling property is poor, and the film layer cannot achieve the mirror effect, generally For low-end product coating; (2) single product, can only be used for sheet B flat coating.

technical problem

An object of the present invention is to provide an extrusion transfer coating method for forming a coating film layer by sandwiching a transfer medium and a substrate with a coating liquid, and aiming to solve the prior art coating technique. The use of a thinner in the presence of a safety hazard and the problem of only single-function coating processing.

Technical solution

In a first aspect, an extrusion transfer coating method is provided, comprising the steps of:

An extrusion transfer coating apparatus is provided, the extrusion transfer coating apparatus comprising a frame having an input end and an output end, and a conveying device disposed on the frame to convey the substrate, the conveying device including synchronous rolling Upper and lower squeeze rolls;

Providing a coating liquid, which is sprayed onto the surface of the substrate;

Providing a transfer medium, wrapping the transfer medium around the surface of the upper squeeze roll;

Transfer, the substrate carries the coating liquid between the upper pressing roller and the lower pressing roller, and the coating liquid is sandwiched between the substrate and the transfer medium Forming a coating film layer between the transfer medium and the substrate under the pressing force between the upper pressing roller and the lower pressing roller, the coating film layer The surface of the transfer medium is transferred to the surface of the coating film after the curing treatment by the curing treatment.

Further, in the step of providing the extrusion transfer coating apparatus, the substrate is an off-line plastic sheet or a film web, or the substrate is continuously extruded online by an extrusion line. Plastic sheet or film.

Further, in the transferring step, the pressure of the upper pressing roller is adjusted to change the thickness of the coating film layer.

Further, in the step of providing the extrusion transfer coating apparatus, the extrusion transfer coating apparatus further includes: a lower driving roller and a transition pressure roller, the lower driving roller and the transition roller setting Cooperating with the output end and the substrate, the substrate on which the coating film layer is formed, together with the transfer medium, between the lower driving roller and the intermediate pressure roller and the lower driving roller The synchronous pressure roller is operated in synchronization.

Further, in the step of providing the extrusion transfer coating apparatus, the lower pressing roller and the upper pressing roller are arranged side by side in the conveying direction of the substrate, and the substrate is bypassed clockwise The lower pressing roller bypasses the upper pressing roller counterclockwise together with the coating medium.

Further, in the step of providing the extrusion transfer coating apparatus, the upper pressing roller and the lower pressing roller are arranged up and down on upper and lower sides of the substrate, and the upper pressing roller The transition press roller is located on the same side of the substrate, and the lower squeeze roller and the lower drive roller are located on the same side of the substrate.

Further, the conveying device further includes:

a lower flat belt wound around the lower squeeze roller and the lower drive roller;

Uploading a moving roller to drive the upper pressing roller to rotate;

An upper flat belt diffracted between the upper squeeze roller and the upper drive roller;

Wherein the substrate on which the coating film layer is formed, along with the transfer medium, passes through a gap between the upper planar belt and the lower planar belt.

Further, the upper flat belt replaces the transfer medium, and the upper flat belt is provided with a texture pattern.

Further, in the transferring step, the upper flat belt has the same linear velocity as when the lower flat belt is in operation, and operates in synchronization with the substrate, the coating film layer, and the transfer medium.

Further, in the step of providing the extrusion transfer coating apparatus, the linear speeds of the upper driving roller and the lower driving roller are automatically synchronized with the speed of the substrate.

Further, in the transferring step, the curing process is completed by a curing device having an ultraviolet UV light source, the UV light source illuminating the coating film layer and instantaneously crosslinking and curing the coating film layer .

The technical effect of the present invention relative to the prior art is that the coating film layer formed by the coating liquid is completely covered by the transfer medium during the entire transfer process, so that the coating film layer is isolated from the air. Not affected by ambient temperature, humidity, and air cleanliness; and sandwiching the transfer medium and the coating liquid coated by the pressing force of the upper and lower pressing rolls The substrate forms a coating film layer having a uniform thickness on the substrate, which greatly reduces the cost.

DRAWINGS

1 is a schematic structural view of a plastic sheet leaching coating apparatus provided by the prior art;

2 is a schematic structural view of a roll coating apparatus for a plastic film roll provided by the prior art;

3 is a schematic structural view of a plastic sheet roll coating apparatus provided by the prior art;

4 is a process flow diagram of an extrusion transfer coating method according to an embodiment of the present invention;

Figure 5 is a schematic structural view of the extrusion transfer coating apparatus of Figure 4;

Figure 6 is a schematic view showing a specific structure of the extrusion transfer coating apparatus of Figure 5;

Figure 7 is another schematic structural view of the extrusion transfer coating apparatus of Figure 5;

Figure 8 is a schematic view showing still another specific structure of the extrusion transfer coating apparatus of Figure 5.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 4 to FIG. 8 , the extrusion transfer coating method provided by the embodiment of the present invention includes the following steps:

S1: providing an extrusion transfer coating apparatus comprising a frame 4 having an input end 42 and an output end 44 and a conveying device disposed on the frame 4 to convey the substrate 1 7, the conveying device 7 comprises a synchronous rolling upper pressing roller 70 and a lower pressing roller 71;

S2: providing a coating liquid 2, which is sprayed onto the surface of the substrate 1;

S3: providing a transfer medium 3, wrapping the transfer medium 3 around the surface of the upper pressing roller 70;

S4: transfer, the substrate 1 carries the coating liquid 2 between the upper pressing roller 70 and the lower pressing roller 71, and the coating liquid 2 is sandwiched between the substrate Between the transfer medium 3 and the transfer medium 3, under the pressing force between the upper pressing roll 70 and the lower pressing roll 71, on the transfer medium 3 and the substrate 1 A coating film layer is formed to be adhered to the surface of the substrate 1 by a curing treatment, and the texture of the surface of the transfer medium 3 is transferred to the surface of the coating film layer after the curing treatment.

The extrusion transfer coating method provided by the embodiment of the present invention utilizes the transfer medium 3 to completely cover the coating film layer formed by the coating liquid 2 throughout the transfer process, thereby making the coating film layer Isolated from the air, unaffected by ambient temperature, humidity, and air cleanliness; and sandwiching the transfer medium 3 with the squeezing force of the upper squeezing roller 70 and the lower squeezing roller 71 and coated with The substrate 1 of the coating liquid 2 forms a coating film layer having a uniform thickness on the substrate 1, which greatly reduces the cost.

In this embodiment, the step S1 of providing the squeeze transfer coating apparatus may be performed in synchronization with the step S2 of supplying the coating liquid and the step S3 of providing the transfer medium, or may be sequentially performed in a certain order.

In this embodiment, the coating liquid 2 has no diluent, is a transparent polymer resin UV-curing coating, and is solvent-free coating, and its organic volatile matter is almost zero, environmentally friendly and has no emission, completely eliminating fire protection. Security risks.

In this embodiment, the transfer medium 3 is a transparent plastic film such as a transfer film, and the surface thereof may be a mirror surface, a matte, a matt, a hairline, a carbon pattern or the like. The texture information of the surface of the transfer medium 3 is completely transferred to the surface of the coating film layer during the transfer process. Preferably, the transfer medium 3 may be used as a protective film of the substrate 1 or the coating film layer to the next process, or the transfer medium 3 may be removed immediately after the coating film layer is cured. A protective film is attached.

In other embodiments, the transfer medium 3 may be any other sheet-like medium to which a texture pattern is attached, and the texture pattern may be a mirror surface, a matte, a matt, a hairline, a carbon pattern, or the like.

For the transfer process, the same extrusion transfer coating equipment and the same process can be used to produce different coating layers by simply changing different transfer media 3, for example, mirror, matte, matt, hairline , carbon grain or other patterns.

In this embodiment, the sheet material or the film web to which the above-mentioned transfer medium 3 is applied can be used for related products in the fields of building materials, furniture, decorative veneers, and the like, and can also be used for related products in other fields, for example, in digital products. Touch screen, display panel; mobile phone, television, digital camera, computer tablet, notebook window front screen, etc.; switch panel, membrane switch, nameplate signage, etc. in household appliances; car interior, car interior film, Plastic windows, etc.; transparent roofs for large venues in other applications, highway/subway noise barriers, bulletproof glass, protective lenses, etc.

Referring to FIGS. 5 to 8, in this embodiment, the upper pressing roller 70 and the lower pressing roller 71 are identical in structure and size. Preferably, the upper pressing roller 70 and the lower pressing roller 71 are both stainless steel rollers, both of which have the same diameter and the same roller surface length. More preferably, the upper pressing roller 70 and the lower pressing roller 71 have a diameter ranging from 60 to 800 mm and a roller surface length of 300 to 3000 mm.

Referring to FIG. 4 to FIG. 8 , before the transfer step S4 is performed, the upper pressing roller 70 and the lower pressing roller 71 are kept at a certain distance; and the transfer medium 3 is along the substrate 1 a moving direction of the coating passes between the upper pressing roller 70 and the lower pressing roller 71 up to the output end 44; setting a supply amount of the coating liquid 2 along the substrate 1 The coating liquid 2 is supplied in close proximity to the upper pressing roller 70 and the lower pressing roller 71. When the transfer step is performed, the upper pressing roller 70 is moved toward the side of the lower pressing roller 71 and both of them exert a pressing force on the substrate 1 and the transfer medium 3 interposed therebetween. Forming the coating film layer between the substrate 1 and the transfer roller, and the coating film layer is instantaneously cross-linked and cured to form a cured film layer attached to the surface of the substrate 1 upon curing treatment, and The pattern on the transfer medium 3 is transferred onto the cured film layer such that a mirror surface, a frosted surface, a matte surface, a brushed surface or other textured surface is formed on the surface of the substrate 1.

Referring to FIG. 4 to FIG. 8, in the step S2 of providing a coating liquid, the coating liquid 2 is provided by a feeding device 5 provided on the frame 4, the feeding device 5 comprising: a liquid storage solution a tank 52, a supply port 54 and a conveying pipe (not shown), wherein the liquid storage tank 52 is for storing the coating liquid 2 and is a constant temperature liquid storage tank 52; the supply port 54 is disposed at the storage tank Above the substrate 1 to coat the coating liquid 2 onto the substrate 1; the conveying pipe is connected between the liquid storage tank 52 and the supply port 54, and in the conveying pipe Provided thereon: a metering pump (not shown), the coating liquid 2 communicating with the liquid storage tank 52 and providing a controlled flow rate to the supply port 54; and a control valve disposed at the supply port 54 is connected between the metering pump to control opening and closing of the supply port 54. Preferably, the metering pump is a precision metering pump, and more preferably, is a small stainless steel gear pump with a flow rate of 0-500 ml/min and a metering accuracy of 0.05-1.0 ml. The storage tank 52 has a storage capacity of 25 L, a temperature control of 35 to 80 ° C, and a constant temperature accuracy of ± 1 ° C. In order to keep the coating liquid 2 in a constant temperature state, the feed port 54 and the conveying pipe are heated by hot water clamping, and a layer of insulating layer is coated on the outside. The control valve is a back pressure valve, and the back pressure valve is used to control the opening and closing of the supply port 54, thereby controlling the flow of the coating liquid 2.

4 to 8, in the step S3 of providing a transfer medium, the transfer medium 3 passes through the upper pressing roller 70 after being released by the unwinding device 6 provided on the frame 4. a gap between the lower pressing rollers 71, the unwinding device 6 includes: a unwinding frame 62 vertically mounted on the frame 4; and a second air rising shaft 64 mounted to the unwinding frame 62 The transfer medium 3 is wound around the second gas rising shaft 64 and rotates around the second gas rising shaft 64; the second flattening roller 66 is rotatably coupled to the unwinding frame 62 and located The transfer medium 3 is stretched between the unwinding frame 62 and the upper pressing roller 70. It can be understood that the second gas rising shaft 64 is driven by a motor, and the motor is controlled by a vector inverter and a tension automatic controller. When the transfer medium 3 is wound around the second gas rising shaft 64, The transfer medium 3 is released by the motor driving the second air rising shaft 64 to rotate and driving the transfer medium 3 to rotate. The transfer medium 3 released from the second gas rising shaft 64 is stretched by the second flattening roller 66 and passed between the upper pressing roller 70 and the lower pressing roller 71 And output from the output terminal 44.

Referring to FIG. 4 and FIG. 5, further, in the step S1 of providing the extrusion transfer coating apparatus, the substrate 1 is an off-line plastic sheet or a film web. It can be understood that the substrate 1 is a spare material placed on the frame 4, and the device for processing the substrate 1 is disposed separately from the extrusion transfer coating device, that is, not disposed on the same production line. That is to say, the extrusion transfer coating method can be independently performed on an extrusion transfer coating apparatus without depending on other peripheral equipment, and is flexible in use and is not limited by the field.

Referring to FIGS. 4 and 5, further, in the step S1 of providing the extrusion transfer coating apparatus, the substrate 1 is a plastic sheet or film continuously extruded in-line by an extrusion line. It can be understood that the substrate 1 is formed by an extrusion apparatus disposed on an extrusion line, the extrusion apparatus and the extrusion transfer coating apparatus are mounted on the same production line, and the extrusion transfer coating The cloth device is disposed at a next station of the extrusion device, and the substrate 1 processed by the extrusion device is directly conveyed to the extrusion transfer coating device to perform coating work of the coating film layer. To avoid secondary pollution or damage caused by transportation, save processing steps and reduce manpower, and greatly improve production efficiency. Preferably, the extrusion line is a plastic sheet extrusion line or a plastic film extrusion line.

In this embodiment, the transfer medium 3 is suitable for performing a transfer process on the surface of a sheet material or a film web, in particular, a mirror surface, a frosted surface, a matte surface, a brushed surface or other pattern may be applied to the surface of the sheet material. Coating and curing production of anti-scratch, abrasion resistance, anti-fingerprint, impact resistance, aging resistance, high tensile, anti-glare, anti-reflection, anti-static, anti-fog and other polymer functional films; The surface of the material is wear-resistant, anti-fingerprint, impact-resistant, aging-resistant, high-stretching, anti-glare, anti-reflection, anti-static, anti-fog, etc. on the mirror surface, frosted surface, matte surface, brushed surface or other pattern surface. Coating and curing production of molecular functional films. The sheet or film coil to which the above-mentioned transfer medium 3 is applied can be used for related products in the fields of building materials, furniture, decorative veneers, and the like, and can also be used for related products in other fields, for example, a protective film on an electronic product display screen, etc. Wait.

Referring to FIGS. 4 to 8, further, in the transferring step S4, the pressure of the upper pressing roller 70 is adjusted to change the thickness of the coating film layer. It can be understood that by providing the pressure regulating cylinder 700 on the conveying device 7 and the jacking support 710 used in conjunction with the pressure regulating cylinder 700, the pressure regulating cylinder 700 and the jacking bearing 710 are set and assembled. At the input end 42 of the frame 4, the upper pressing roller 70 is lifted by the jacking support 710, and the pressure of the upper pressing roller 70 is adjusted by the pressure regulating cylinder 700. In other embodiments, the pressure regulating cylinder 700 can be replaced by a pressure regulating cylinder, a precision threaded microprocessor, or a precision pressure micro-regulator.

Referring to FIG. 6 to FIG. 8 , further, in the step S1 of providing the extrusion transfer coating apparatus, the extrusion transfer coating apparatus further includes: a lower driving roller 72 and a transition pressure roller 73. The transmission roller 72 and the intermediate pressure roller 73 are disposed at the output end 44 and cooperate with each other, and the substrate 1 on which the coating film layer is formed is passed through the lower transmission together with the transfer medium 3 The roller 72 and the intermediate pressure roller 73 operate in synchronization with the lower drive roller 72 and the intermediate pressure roller 73. It can be understood that the lower driving roller 72 is a power roller for driving the lower pressing roller 71 to operate, and the linear velocity of the lower driving roller 72 is synchronized with the conveying speed of the substrate 1 to ensure the base. The material 1 and the transfer medium 3 operate smoothly.

Preferably, the lower drive roller 72 and the transition pressure roller 73 are identical in structure and size. More preferably, the lower driving roller 72 and the intermediate pressure roller 73 are both NBR rubber-coated rubber rollers, and the diameter thereof is 200 mm, and the roller surface length of the lower driving roller 72 is 1300 mm, and the rubber coating thickness is ≥10 mm. The hardness is 80 degrees.

Referring to FIG. 6 to FIG. 8 , preferably, the conveying device 7 further includes: a first driving cylinder 74 disposed on the frame 4 and driving the transition roller 73 relative to The lower drive roller 72 moves up and down. The first driving cylinder 74 drives the transition pressure roller 73 to move up and down relative to the lower driving roller 72 to form a gap between the transition pressure roller 73 and the lower driving roller 72 for the substrate 1 and The gap through which the transfer film passes.

Referring to FIGS. 4 to 8, further, in the step S1 of providing the extrusion transfer coating apparatus, the transfer of the lower pressing roller 71 and the upper pressing roller 70 along the substrate 1 The direction is arranged side by side, the substrate 1 bypasses the lower pressing roller 71 clockwise and clamps the coating liquid 2 with the transfer medium 3, and then bypasses the upper pressing roller 70 counterclockwise. . It can be understood that the lower pressing roller 71 is disposed side by side with the upper pressing roller 70 between the feeding device 5 and the output end 44 where the lower driving roller 72 and the transition pressing roller 73 are located. The substrate 1 enters the frame 4 along the input end 42 and passes through a gap between the lower pressing roller 71 and the upper pressing roller 70, bypassing the upper surface counterclockwise Squeeze roller 70 and deliver to the output Between the intermediate pressure roller 73 at 44 and the lower transmission roller 72; the transfer medium 3 outputted from the unwinding device 6 passes through the lower squeezing roller 71 and the upper squeezing The gap between the rollers 70 bypasses the upper pressing roller 70 counterclockwise to pass through the lower driving roller 72 and the transition pressing roller 73 together with the substrate 1 coated with the coating liquid 2. between. In this embodiment, the curing device 8 is disposed on the frame 4 and under the upper pressing roller 70 so as to be coated on the substrate around the surface of the upper pressing roller 70. The coating liquid 2 on 1 is instantaneously solidified to form a coating film layer.

Referring to FIG. 6 to FIG. 8 , the frame 4 includes: an upper frame 45 and a lower frame 46 , the upper frame 45 and the lower frame 46 are arranged up and down; a pneumatic lifting device 48, the pneumatic lifting device 48 drives the upper frame 45 is raised and lowered with respect to the lower frame 46. It can be understood that the upper frame 45 and the lower frame 46 are both made of steel structure, since the upper frame 45 and the lower frame 46 need to carry all of the extrusion transfer coating equipment. The upper frame 45 and the lower frame 46 have a strong characteristic and are horizontally disposed. The upper frame 45 is lifted and lowered relative to the lower frame 46 by the pneumatic lifting device 48, and the upper pressing roller 70 disposed on the upper frame 45 is lifted and lowered as the upper frame 45 is lifted and lowered.

Referring to FIG. 7 and FIG. 8, preferably, the pneumatic lifting device 48 includes: a second driving cylinder 482 disposed at an upper end of the upper frame 45 and controlling the lifting of the upper frame 45; a slide bearing 484, Connected to the drive cylinder and used to position the lifting position of the upper frame 45. The second driving cylinder 482 controls the lifting and lowering of the upper frame 45 and drives the upper pressing roller 70 to ascend and descend, and the lifting position of the upper frame 45 is positioned by the sliding rail bearing 484.

When the squeeze transfer coating apparatus is in a standby and a shutdown state, the first drive cylinder 74 raises the transition pressure roller 73 to a high position, and the second drive cylinder 482 places the upper frame 45 Together with the upper pressing roller 70 being raised to a high position, the substrate 1 can pass directly through the gap between the upper pressing roller 70 and the lower pressing roller 71 and through the transition pressing roller 73 The gap between the drive rollers 72 is described, but not applied; when the press transfer coating apparatus is in the on state, the first drive cylinder 74 lowers the transition press 73 to a lower position, The second driving cylinder 482 lowers the upper frame 45 to the upper pressing roller 70 to a lower position, and the substrate 1 and the transfer medium 3 sandwich the coating liquid 2 through the upper pressing A gap between the roller 70 and the lower pressing roller 71 and a gap between the transition roller 73 and the lower driving roller 72 perform a transfer operation.

Referring to FIG. 4 to FIG. 8 , further, in the step S1 of providing the extrusion transfer coating apparatus, the upper pressing roller 70 and the lower pressing roller 71 are arranged on the substrate up and down. The upper and lower sides of the upper and lower sides, the upper pressing roller 70 and the intermediate pressure roller 73 are located on the same side of the substrate 1, and the lower pressing roller 71 and the lower driving roller 72 are located on the substrate 1 Another identical side. It can be understood that the top surface of the lower pressing roller 71 is coplanar with the mesa of the lower frame 46, so that the substrate 1 is horizontally placed along the water platform surface of the lower frame 46 and horizontally passed through. The gap between the pressing roller 71 and the upper pressing roller 70 is described, and the coating liquid 2 is uniformly made by the pressing force of the upper pressing roller 70 and the lower pressing roller 71. It is applied to the surface of the substrate 1 and a corresponding pattern on the transfer medium 3 is transferred onto the coating film layer.

Referring to FIG. 7, preferably, the conveying device 7 further includes: a lower roller 75 disposed side by side in the conveying direction of the substrate 1 on the lower frame 46 for conveying the substrate 1; a roller 76 disposed on the upper frame 45 and disposed opposite to the lower roller 75; wherein the substrate 1 on which the coating film layer is formed is passed along with the transfer medium 3 The gap between the idler roller 75 and the upper idler roller 76 is described. Using the upper idler roller 76 and the lower idle roller 75 to facilitate transporting the substrate 1 coated with the coating liquid 2 together with the transfer medium 3 from the input end 42 of the frame 4 to its output end 44. Reducing the resistance of the substrate 1 during transport. In other embodiments, the upper idler roller 76 and the lower idler roller 75 may be replaced by other means, such as alternately disposed rollers, for the purpose of driving the transport.

Referring to FIG. 8, further, the conveying device 7 further includes: a lower flat belt 77 wound between the lower pressing roller 71 and the lower driving roller 72; and an upper driving roller 78 driving the upper portion The squeezing roller 70 rotates; an upper flat belt 79 is wound between the upper squeezing roller 70 and the upper driving roller 78; wherein the substrate 1 on which the coating film layer is formed is described The transfer medium 3 passes through a gap between the upper flat belt 79 and the lower flat belt 77.

It can be understood that the lower flat belt 77 is disposed between the lower pressing roller 71 and the lower driving roller 72, and the lower driving roller 71 is driven to operate by the lower driving roller 72. A roller 78 and the upper pressing roller 70 are disposed on the upper frame 45 and are disposed with an upper flat belt 79 therebetween, and the upper driving roller 70 is driven to operate by the upper driving roller 78. In the transfer step S4, the substrate 1 and the transfer medium 3 are sandwiched by the upper flat belt 79 and the lower flat belt 77 to apply the substrate coated with the coating liquid 2. 1 and the transfer medium 3 is kept flat and transmitted synchronously.

In this embodiment, the upper flat belt 79 is used in place of the transfer medium 3, that is, by providing various texture patterns on the upper flat belt 79 to effect the extrusion transfer coating. The texture patterns described herein include mirrors, matte faces, matte faces, brushed faces or other tread faces, and the like.

In this embodiment, the upper driving roller 78 is a nitrile rubber rubberized roller and has a diameter of 200 mm. The lower driving roller 72 has a roller surface length of 1300 mm, an encapsulation thickness of ≥10 mm, and a hardness of 80 degrees.

In this embodiment, the upper flat belt 79 may be a stainless steel flat conveyor belt, or may be PVC flat conveyor belt, PU flat conveyor belt or other non-metallic flat conveyor belt, depending on the coated substrate 1 and the surface texture pattern of the transfer medium, the lower flat belt 77 may be a stainless steel flat conveyor belt, or Yes PVC flat conveyor belts, PU flat conveyor belts or other non-metallic flat conveyor belts, depending on the substrate 1 to be coated.

Referring to FIGS. 6-8, in the embodiment, the conveying device 7 further includes a pressure regulating cylinder 700 disposed on the frame 4 and a jacking support 710 for use with the pressure regulating cylinder 700. The pressure regulating cylinder 700 and the jacking support 710 are set and set at each end of the upper frame 45, and the upper frame 45 is lifted by the jacking support 710 and The pressure of the upper squeeze roller 70 and the upper drive roller 78 is adjusted by the pressure regulating cylinder 700.

In this embodiment, the upper drive roller 78 and the lower drive roller 72 respectively control the linear velocity thereof by using a linear velocity sensor, a vector inverter, and a servo motor to synchronize the linear velocity with the conveying speed of the substrate 1. .

In this embodiment, the extrusion transfer coating apparatus further includes a take-up/winding device 9 disposed at the output end 44 of the frame 4 and a unwinding device disposed at the input end 42 of the frame 4. 6.

Referring to FIG. 7 and FIG. 8 , the loading/unwinding device 9 includes: a loading/unloading frame 92 vertically mounted on the frame 4; and a first air rising shaft 94 mounted on the receiving/receiving/ The unwinding frame 92 is configured to collect or release the transfer medium 3 and the transfer medium 3 is wound around the first air-up shaft 94; the first flattening roller 96 is rotatably coupled to the receiving/rewinding roller The frame 92 is located between the take-up/reel frame 92 and the output end 44 and supports the transfer medium 3. It can be understood that the first gas rising shaft 94 is driven by a motor, and the motor is controlled by a vector inverter and a tension automatic controller. When the transfer medium 3 is wound around the first gas rising shaft 94, The transfer medium 3 is collected or released by the motor driving the first air-up shaft 94 to rotate and driving the transfer medium 3 to rotate. When the substrate 1 is a film roll, the take-up/winding device 9 is used as a winding device, in particular, after being stretched by the first flattening roller 96, it will pass through the transition roller 73. The substrate 1 and the coating film layer adhered to the surface between the lower driving roller 72 and the transfer medium 3 are collected; or, when the protective film needs to be attached to the substrate 1 The discharge/winding device 9 is used as the unwinding device 6, and specifically, the transfer medium 3 released from the first air-up shaft 94 is stretched by the first flattening roller 96 and then output to the lower Input 42 of a process.

Referring to FIG. 6 to FIG. 8 , the unwinding device 6 includes: a unwinding frame 62 vertically mounted on the frame 4; a second air rising shaft 64 mounted on the unwinding frame 62, The transfer medium 3 is wound around the second gas rising shaft 64 and rotated about the second gas rising shaft 64; the second flattening roller 66 is rotatably coupled to the unwinding frame 62 and located at the unwinding The transfer medium 3 is stretched between the frame 62 and the upper pressing roller 70. It can be understood that the second gas rising shaft 64 is driven by a motor, and the motor is controlled by a vector inverter and a tension automatic controller. When the transfer medium 3 is wound around the second gas rising shaft 64, The transfer medium 3 is released by the motor driving the second air rising shaft 64 to rotate and driving the transfer medium 3 to rotate. From the second gas rise axis The transfer medium 3 released on the 64 is stretched by the second flattening roller 66, passes between the upper pressing roller 70 and the lower pressing roller 71, and is output from the output end 44. .

Referring to FIG. 4 to FIG. 8 , further, in the transferring step S4 , the upper flat belt 79 is the same as the linear velocity when the lower flat belt 77 is in operation, and is coated with the substrate 1 . The film layer and the transfer medium 3 operate in synchronization. It can be understood that the substrate 1, the coating film layer and the transfer medium 3 are subjected to the pressing force of the upper pressing roller 70 and the lower pressing roller 71, and continue to be subjected to the above The flat belt 79 and the lower flat belt 77 are clamped and operated at the same linear velocity to ensure good uniformity of the coating film layer formed on the substrate 1. Thus, the same extrusion transfer coating apparatus can apply both a film and a sheet.

Referring to FIG. 4 and FIG. 8, further, in the step S1 of providing the extrusion transfer coating apparatus, the linear velocity of the upper driving roller 78 and the lower driving roller 72 is the same as that of the substrate 1. The speed is automatically synchronized. The thickness of the coating film layer is adjusted by adjusting the linear velocities of the upper driving roller 78 and the lower driving roller 72. The upper flat belt 79 and the lower flat belt 77 are superposedly arranged on top of each other, and the two sets of flat belts are completely synchronized, sandwiching the substrate 1 and the transfer medium 3 and a coating film layer therebetween , to keep it running smoothly, to ensure that the coating film layer is flat and uniform.

Further, in the transferring step S4, the curing process is completed by a curing device 8, and the curing device 8 is provided with an ultraviolet UV light source, and the UV light source illuminates the coating film layer and makes the coating film layer instantaneous. Crosslinking cures. Preferably, the UV light source adopts a water-cooled quartz tube high pressure mercury lamp with a wavelength of 200 to 400 nm, an irradiation broadband of 300 to 3000 mm, and an exhaust gas exhaust fan and an active light shielding plate. The light emitted by the UV light source is irradiated onto the substrate 1 or blocked by the UV light source by controlling the movable visor.

In the transfer step S4, the coating film layer is always covered by the transfer medium 3 to be completely isolated from the outside, such that changes in ambient temperature, humidity, and/or cleanliness are applied to the coating film layer. The quality impact can be ignored. Since the coating film layer is isolated from the air, the occurrence of the "oxygen inhibition" phenomenon during the curing process is eliminated, thereby eliminating the phenomenon of yellowing of the film substrate 1.

The extrusion transfer coating device in each of the above embodiments adopts a human-machine interface PLC control system to realize unified control and facilitates automation. The extrusion transfer coating device can be used alone or in combination with equipment at other stations to form a processing line for online use.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

An extrusion transfer coating method, comprising the steps of:

An extrusion transfer coating apparatus is provided, the extrusion transfer coating apparatus comprising a frame having an input end and an output end, and a conveying device disposed on the frame to convey the substrate, the conveying device including synchronous rolling Upper and lower squeeze rolls;

Providing a coating liquid, which is sprayed onto the surface of the substrate;

Providing a transfer medium, wrapping the transfer medium around the surface of the upper squeeze roll;

Transfer, the substrate carries the coating liquid between the upper pressing roller and the lower pressing roller, and the coating liquid is sandwiched between the substrate and the transfer medium Forming a coating film layer between the transfer medium and the substrate under the pressing force between the upper pressing roller and the lower pressing roller, the coating film layer The surface of the transfer medium is transferred to the surface of the coating film after the curing treatment by the curing treatment.
The extrusion transfer coating method according to claim 1, wherein in the step of providing the extrusion transfer coating apparatus, the substrate is an off-line plastic sheet or a film web, Alternatively, the substrate is a plastic sheet or film that is continuously extruded in-line from an extrusion line.
The extrusion transfer coating method according to claim 1, wherein in the transferring step, the pressure of the upper pressing roller is adjusted to change the thickness of the coating film layer.
The extrusion transfer coating method according to any one of claims 1 to 3, wherein in the step of providing the extrusion transfer coating apparatus, the extrusion transfer coating apparatus further comprises a lower driving roller and a transition pressure roller, wherein the lower driving roller and the intermediate pressure roller are disposed at the output end and cooperate with each other, and the substrate on which the coating film layer is formed is worn along with the transfer medium Between the lower drive roller and the intermediate pressure roller and in synchronization with the lower drive roller and the intermediate pressure roller.
The extrusion transfer coating method according to claim 4, wherein in the step of providing the extrusion transfer coating apparatus, the lower pressing roller and the upper pressing roller are along The conveying direction of the substrates is arranged side by side, and the substrate bypasses the upper pressing roller clockwise and bypasses the upper pressing roller counterclockwise with the coating medium.
The extrusion transfer coating method according to claim 4, wherein in the step of providing the extrusion transfer coating apparatus, the upper pressing roller and the lower pressing roller are arranged one above another On the upper and lower sides of the substrate, the upper pressing roller and the transition pressing roller are located on the same side of the substrate, and the lower pressing roller and the lower driving roller are located on the substrate One same side.
The extrusion transfer coating method according to claim 6, wherein the conveying device further comprises:

a lower flat belt wound around the lower squeeze roller and the lower drive roller;

Uploading a moving roller to drive the upper pressing roller to rotate;

An upper flat belt diffracted between the upper squeeze roller and the upper drive roller;

Wherein the substrate on which the coating film layer is formed, along with the transfer medium, passes through a gap between the upper planar belt and the lower planar belt.
The extrusion transfer coating method according to claim 7, wherein said upper flat belt replaces said transfer medium, and said upper flat belt is provided with a texture pattern.
The extrusion transfer coating method according to claim 7, wherein in the transferring step, the upper flat belt has the same linear velocity as that of the lower flat belt, and is bonded to the substrate, The coating film layer and the transfer medium operate in synchronization.
The extrusion transfer coating method according to claim 7, wherein in the step of providing said extrusion transfer coating apparatus, said linear speed of said upper driving roller and said lower driving roller The speed of the substrate is automatically synchronized.
The extrusion transfer coating method according to any one of claims 1 to 10, wherein in the transferring step, the curing process is completed by a curing device, and the curing device is provided with an ultraviolet UV light source, A UV light source illuminates the coating film layer and the coating film layer is instantaneously crosslinked and cured.