Plastic-coated steel roller and color-pattern film-coated plate processing technology based on plastic-coated steel roller

Abstract

The invention relates to the technical field of color-pattern film-coated plate processing, in particular to a plastic-coated steel roller and a color-pattern film-coated plate processing technology based on the plastic-coated steel roller, the plastic-coated steel roller comprises a roller body, a supporting column and a texture layer, the texture layer is arranged on the outer side of the roller body, and the texture layer and the roller body form a cylinder concentric with the supporting column for film surface texture forming. The method comprises the following steps: step 1, feeding pretreatment, step 2, PVC layer coating pretreatment, step 3, PVC layer pasting and texture generation, and step 4, cooling, film fixing and protective film pasting. The problem that the concave-convex textures on the PVC film are easy to fade due to the existing processing technology of the color-pattern film-coated plate is effectively solved; the texture layer with the texture grooves is arranged on the outer side of the roller body, meanwhile, after the glue layer is subjected to high-temperature curing, the PVC film is pressed through the plastic pasting steel roller with the texture grooves and the texture layer, under the action of high temperature, the PVC film layer is softened, and the appropriate texture hand feeling with a certain depth can be obtained through pressing more easily.

Description

Technical Field

[0001] The present invention relates to the technical field of color picture laminated board processing, and particularly relates to a plastic-coated steel roller and a color picture laminated board processing process based on the plastic-coated steel roller. Background Art

[0002] When processing a color picture laminated board, it is necessary to use a pressing device to press a PVC film onto a metal substrate. In order to better bond the PVC film to the metal substrate, an adhesive layer is coated on the treated metal substrate, and the adhesive layer and the metal plate are heated to a suitable temperature. At high temperature, the heat-resistant adhesive layer can be better cured.

[0003] In order to improve the quality and feel of the color picture laminated board, some will press texture grooves with a certain depth on the PVC film. However, when applying the PVC film using the above processing technology and equipment, since the PVC film is at high temperature and under pressure when it is bonded to the steel plate, the concave and convex texture after bonding will be flattened and the feel will disappear, resulting in problems such as poor scratch resistance. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a plastic-coated steel roller and a color picture laminated board processing process based on the plastic-coated steel roller, which effectively solves the problem that the concave and convex texture on the PVC film is easily faded in the existing color picture laminated board processing process.

[0005] The technical solution solved by the present invention is that a plastic-coated steel roller includes a roller body, support columns, and a texture layer. The roller body supports the texture layer for film surface pressing. The support columns are two and are evenly distributed concentrically at both ends of the roller body. The texture layer is arranged on the outer side of the roller body and forms a cylindrical shape concentric with the support columns with the roller body for film surface texture forming.

[0006] Preferably, the texture layer is sleeved on the outer side of the roller body and can be fixedly connected to the roller body. The texture layer is provided with texture grooves for the film surface, and the texture grooves act on the PVC film surface.

[0007] Preferably, the roller body is provided with positioning columns for positioning the texture layer. The texture layer is provided with positioning holes sleeved on the positioning columns, and a limiting structure for limiting the texture layer is arranged on the side of the texture layer.

[0008] Preferably, the limiting structure includes a limiting column and a limiting buckle. The limiting buckle is arranged at one end of the texture layer in an unfolded state and is hinged to the side of the texture layer. The limiting column is arranged at the other end of the texture layer in an unfolded state and is fixedly connected to the side of the texture layer. The limiting column can be inserted into the limiting buckle to limit the texture layer in a wound state.

[0009] The color picture laminated board processing process based on the plastic-coated steel roller includes the following steps

[0010] Step 1, pre-treatment before feeding: Unroll and suture the metal coil. After suturing, perform surface treatment to obtain a metal substrate.

[0011] Step 2, pre-treatment before PVC layer coating: Coat the glue layer and the back coating on the surface of the metal substrate obtained in Step 1 and cure to obtain a metal substrate with a coating layer.

[0012] Step 3, PVC layer laminating and texture generation: Use a plastic-coated steel roller to laminate the PVC layer onto the metal substrate with a coating layer obtained in Step 2 to obtain a color-coated laminated board with a strong tactile texture.

[0013] Step 4, cooling and solidifying the film and applying the protective film: Cool the color-coated laminated board with a strong tactile texture obtained in Step 3 and apply a protective film on the outside of the PVC layer to obtain a finished color-coated laminated board with a strong tactile texture.

[0014] Preferably, the surface treatment in Step 1 includes surface oil stain treatment, surface chemical passivation treatment and drying. The surface oil stain treatment uses an alkali solution with a concentration of 0.5%-3% to remove the oil stain on the surface of the metal steel coil by spraying method. The surface chemical passivation treatment uses a chromium-free coating solution for double-sided coating and drying at 60-100°C.

[0015] Preferably, the dry film thickness of the glue layer in Step 2 is 2-10μm, the curing temperature of the glue layer is 160-220°C, the dry film thickness of the back coating is 4-12μm, and the curing temperature of the back coating is 160-220°C.

[0016] Preferably, the coating methods of the glue layer and the back coating are carried out by coating equipment such as three-roll upper feeding, two-roll upper feeding, three-roll lower feeding or two-roll lower feeding.

[0017] Preferably, the cooling method in Step 4 is water cooling, and the protective film in Step 4 is a PE film.

[0018] The beneficial effects of the present invention are as follows:

[0019] The present invention is provided with a texture layer with texture grooves on the outside of the roller body. At the same time, after high-temperature curing of the glue layer, the PVC film is laminated by using a plastic-coated steel roller with texture grooves and a texture layer. Under the action of high temperature, the PVC film layer is softened and can be more easily pressed out with a suitable texture feel with a certain depth. At the same time, immediately after laminating with the plastic-coated steel roller, the color-coated laminated board is cooled with clean water, which can further solidify the texture of the PVC layer and avoid damage to the texture and feel of the PVC film layer due to the influence of temperature and pressure. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the plastic-coated steel roller in the present invention;

[0021] Figure 2 The present invention Figure 1 A magnified view of middle;

[0022] Figure 3 It is a schematic diagram of the development of the color-patterned film-covered board of the present invention;

[0023] Figure 4 It is a schematic diagram of the cutaway front view structure of the color-patterned laminated board of the present invention;

[0024] In the figure, 1-roller body; 2-support column; 3-texture layer; 4-texture groove; 5-positioning column; 6-positioning hole; 7-limiting column; 8-limiting buckle; 9-metal substrate; 10-glue layer; 11-back coating layer; 12-PVC layer; 13-protective film. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0026] Refer to the instruction manual Figure 1-2 A plastic-coated steel roller includes a roller body 1, a support column 2 and a texture layer 3. The texture layer 3 is coated on the outside of the roller body 1 and supported by the roller body 1. The support columns 2 are arranged at both ends of the roller body 1 to support the rotation of the roller body 1. The support columns 2 are inserted into a driving device, and the roller body 1 is driven to rotate through the driving device via the support columns 2. When the texture layer 3 is coated on the outside of the roller body 1 to form a cylinder, the formed cylinder is concentric with the support column 2, which can better enable the plastic-coated steel roller to rotate better.

[0027] The texture layer 3 is provided with suitable texture grooves 4. Since the texture layer 3 and the roller body 1 can be disassembled, different textures can be pressed on the PVC film surface only by replacing the texture layer 3. Moreover, replacing only the texture layer 3 can reduce the production cost of the factory and increase the profit of different batches of color-coated plates.

[0028] In order to better disassemble and install the texture layer 3, a positioning column 5 for positioning the texture layer 3 is provided on the roller body 1, and a positioning hole 6 that can be mounted on the positioning column 5 is opened on the texture layer 3. The positioning column 5 is inserted into the positioning hole 6 to position the texture layer 3. The side of the texture layer 3 is also provided with a limiting structure for limiting the texture layer 3. The interface of the texture layer 3 coated on the roller body 1 is closed by the limiting structure.

[0029] The limiting structure is divided into a limiting post 7 and a limiting buckle 8. The limiting post 7 and the limiting buckle 8 are arranged at both ends of the planar texture layer 3. Among them, the limiting post 7 is fixedly connected, and the limiting buckle 8 is hingedly connected to the texture layer 3. The limiting buckle 8 that is hingedly connected swings and buckles onto the limiting post 7. At the same time, in order to better limit and clamp, a part of the limiting buckle 8 is slidably connected by a bolt to the other part of the limiting buckle 8 to realize the clamping and limiting of the limiting post 7. When the texture layer 3 is wound around the roller 1 in a curved shape, the limiting buckle 8 and the limiting post 7 approach and buckle each other.

[0030] Refer to the attached Figure 3-4 Example 1: When processing the coated color-coated board with a plastic-coated steel roller, first select a suitable texture layer 3 and wrap the texture layer 3 around the roller 1, and install the support column 2 in the plastic-coated steel roller into a suitable driving device. The above are the preparatory works;

[0031] Step 1: Select a suitable metal coil, unroll the metal coil and sew it to the metal substrate 9 being processed in the equipment. First, use an alkali solution with a concentration of 0.5%-3% to degrease the metal sheet by the spraying method. After degreasing, wash the metal sheet with clean water. After washing, coat both sides of the metal sheet with a chromium-free coating solution and perform a drying treatment at 60-100°C to obtain the metal substrate 9;

[0032] Step 2: Use a three-roll upper feeding, two-roll upper feeding, three-roll lower feeding or two-roll lower feeding coating equipment to coat one side of the metal substrate 9 obtained in Step 1 with an adhesive layer 10. The dry film thickness of the adhesive layer 10 is 2-10 μm. While coating the adhesive layer 10, coat the other side with a back paint layer. The dry film thickness of the back paint layer is 4-12 μm. After the primer layer and the back paint layer are coated, enter a drying oven with a curing temperature of 160-220°C for curing to obtain the metal substrate 9 with a coating layer;

[0033] Step 3: Align the PVC layer 12 with the metal substrate 9 with a coating layer obtained in Step 2 and press the PVC layer 12 through the plastic-coated steel roller. Under the action of the texture grooves 4 in the texture layer 3 on the plastic-coated steel roller, press the PVC layer 12. Since the metal substrate 9 has a certain temperature when the PVC layer 12 is pressed, the PVC layer 12 can better adhere to the adhesive layer 10, and the temperature on the metal substrate 9 can soften the PVC layer 12. At this time, pressing with the plastic-coated steel roller can better shape, so as to form a finished color-coated laminated board with a strong tactile texture;

[0034] Step 4: Directly cool the finished color-coated laminated board with strong tactile texture obtained in Step 3 with clean water. Further shape the texture on the PVC film layer through clean water cooling. Finally, apply a PE protective film 13 on the outer side of the PVC film layer for protection to prevent damage to the PVC film layer during transportation.

[0035] Comparative Example 1:

[0036] Step 1: Press the PVC film layer with a corrugated steel roller to produce corresponding patterns with a certain tactile feeling.

[0037] Step 2: Select the steel coil, and degrease and passivate the surface of the steel coil. The passivated steel coil needs to be rinsed with clean water and dried.

[0038] Step 3: Coat the glue layer 10 and the back paint layer, and perform high-temperature drying treatment after coating.

[0039] Step 4: Use the existing PVC laminating steel roller to laminate the PVC layer 12 with tactile patterns in Step 1 on the metal substrate 9.

[0040] Step 5: Cool with clean water or at room temperature and apply the PE protective film 13.

[0041] By comparing the embodiments of the present invention with the comparative examples, it can be obtained that when laminating the PVC film layer onto the glue layer 10 in the comparative example, since it is necessary to use a high-temperature resistant glue layer 10 that has the ability to cure and bond at high temperatures, the high temperature on the metal plate will soften the PVC film layer during the lamination of the PVC film layer. At the same time, during the softening process of the PVC film layer, the PVC laminating steel roller will apply a certain pressure to the PVC film layer. On the basis of the softened PVC film layer, applying a certain pressure to the PVC film layer will flatten the texture of the PVC film layer, reducing the texture feel of the PVC film layer given before processing.

[0042] The present invention is provided with a texture layer 3 having texture grooves 4 on the outer side of the roller body 1. At the same time, after the high-temperature curing of the glue layer 10, the PVC film is laminated with a PVC laminating steel roller having texture grooves 4 and a texture layer 3. Under the action of high temperature, the PVC film layer is softened and can be more easily pressed out with a suitable texture feel with a certain depth. At the same time, immediately cool the color-coated laminated board with clean water after laminating with the PVC laminating steel roller, which can further solidify the texture of the PVC layer 12 and avoid damaging the texture and feel of the PVC film layer due to the influence of temperature and pressure.

Claims

1. A plastic coated steel roller, characterized in that: The invention comprises a roller body (1), a support column (2) and a texture layer (3), wherein the roller body (1) supports the texture layer (3) for laminating the film surface, the support column (2) is two concentrically evenly distributed at both ends of the roller body (1), and the texture layer (3) is arranged on the outside of the roller body (1) and forms a cylindrical shape with the roller body (1) and the support column (2) for film surface texture forming.

2. The plastic-coated steel roller according to claim 1, characterized in that: The texture layer (3) is fitted onto the outer side of the roller body (1) and can be fixedly connected relative to the roller body (1). The texture layer (3) is provided with a texture groove (4) for the film surface, and the texture groove (4) acts on the PVC film surface.

3. The plastic-coated steel roller according to claim 2, characterized in that: The roller body (1) is provided with a positioning column (5) for positioning the texture layer (3), the texture layer (3) is provided with a positioning hole (6) sleeved on the positioning column (5), and the side of the texture layer (3) is provided with a limiting structure for limiting the texture layer (3).

4. The plastic coated steel roller according to claim 1, characterized in that: The limiting structure comprises a limiting column (7) and a limiting buckle (8); the limiting buckle (8) is arranged at one end of the texture layer (3) in an unfolded state and is hingedly connected to the side of the texture layer (3); the limiting column (7) is arranged at the other end of the texture layer (3) in an unfolded state and is fixedly connected to the side of the texture layer (3); the limiting column (7) can be inserted into the limiting buckle (8) to limit the winding state of the texture layer (3).

5. A process for processing colored coated boards using plastic coated steel rollers according to any one of claims 1 to 4, characterized in that: The following steps are included Step 1: pre-processing of the feed material, unwinding and stitching the metal coil, and performing surface treatment after stitching to obtain a metal substrate (9); Step 2: Pre-coating treatment of the PVC layer (12): applying the glue layer (10) and the back coating layer (11) to the surface of the metal substrate (9) obtained in step 1 and curing the surface to obtain a metal substrate (9) having a coating layer; Step 3: applying the PVC layer (12) and generating the texture, using a plastic-coating steel roller to press the PVC layer (12) onto the metal substrate (9) with the coating layer obtained in step 2 to obtain a color-coated film plate with a strong tactile texture; Step 4: Cooling the solid film and applying the protective film (13). The color coated film plate with a strong tactile texture obtained in step 3 is cooled and a protective film (13) is applied on the outside of the PVC layer (12) to obtain a finished color coated film plate with a strong tactile texture.

6. A color-patterned laminate processing technology according to claim 5, characterized in that: The surface treatment in step 1 includes surface oil treatment and surface chemical passivation treatment and drying. The surface oil treatment uses an alkali solution with a concentration of 0.5%-3% to remove oil from the surface of the metal steel coil by spraying. The surface chemical passivation treatment uses a chromium-free coating solution for double-sided coating and is dried at 60-100°C.

7. A color-patterned laminate processing technology according to claim 6, characterized in that: In the step 2, the dry film thickness of the glue layer (10) is 2-10 μm, the curing temperature of the glue layer (10) is 160-220° C., the dry film thickness of the back coating layer (11) is 4-12 μm, and the curing temperature of the back coating layer (11) is 160-220° C.

8. The color-patterned laminate processing technology according to claim 6 is characterized by: The glue layer (10) and the back coating layer (11) are coated by coating equipment using three-roller upper belt material, two-roller upper belt material, three-roller lower belt material or two-roller lower belt material.

9. The color-patterned laminate processing technology according to claim 6 is characterized by: The cooling method in step 4 is water cooling, and the protective film (13) in step 4 is a PE film.

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