Post-coated single-sided embossed PCM steel plate

Abstract

The utility model relates to the technical field of color-coated sheet production, in particular to a post-coated single-sided embossed PCM steel plate which comprises a first paint layer, a metal base material and a second paint layer which are sequentially arranged along the thickness direction, concave-convex texture grooves are embossed on the contact surface of the metal base material and the first paint layer through an embossing roller, and the first paint layer and the second paint layer are sequentially arranged along the thickness direction. The first paint layer comprises a primer layer and a finish paint layer, and the primer layer is coated on the surface of the metal base material through a rubber roller. The problem that paint is prone to being damaged in the production process of an existing embossed PCM steel plate is effectively solved. According to the utility model, the corresponding paint is coated on the steel plate pressed with the concave-convex texture grooves, so that the situation that the paint layer is damaged when the concave-convex texture grooves are pressed by a steel roller after coating, the metal base material is in contact with outside air, the service life of the metal base material is shortened, and meanwhile, the aesthetic property of the product is reduced is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of color-coated plate production, in particular to a post-coating single-side embossed PCM steel plate. Background Art

[0002] In the existing refrigerator panel manufacturing process, in order to make the refrigerator panel have a variety of colors and textures, PCM steel plates are used for the refrigerator panels. PCM steel plates refer to steel plates that are pre-coated with environmentally friendly paint for home appliances and baked at high temperature. After production, they are cut according to the required size.

[0003] In existing patent application CN201510146086.3, which relates to single-sided embossed PCM steel plates, it is mentioned that an embossing roller is used to extrude a concave and convex tactile texture onto the topcoat of the PCM steel plate to enrich the decorative appearance of the PCM steel plate. The method involves first applying paint to the surface of the steel plate and then embossing the texture. However, this method can easily damage and crack the paint layer when the embossing roller is applied to the surface of the PCM steel plate. This cracking is particularly pronounced after metal stamping and bending, significantly weakening the paint's protective effect on the steel plate and making the steel plate susceptible to corrosion and rust. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the purpose of the present invention is to provide a post-painted single-sided embossed PCM steel plate, which effectively solves the problem that the existing embossed PCM steel plate is prone to damage to the paint during the production process.

[0005] The technical solution provided by the present invention is a post-coated single-sided embossed PCM steel plate, comprising a first paint layer, a metal substrate and a second paint layer arranged in sequence along the thickness direction, wherein the contact surface between the metal substrate and the first paint layer is pressed with a concave and convex texture groove by an embossing roller, the first paint layer comprises a primer layer and a topcoat layer, and the primer layer is applied to the surface of the metal substrate by a rubber roller.

[0006] Preferably, the second paint layer includes a back paint layer coated on the side of the metal substrate facing away from the concave-convex texture grooves, and a chemical treatment layer is provided between the back paint layer and the primer layer and the surface of the metal substrate.

[0007] Preferably, the groove depth of the concave-convex texture is 0.03-0.08 mm.

[0008] Preferably, the chemical treatment layer adopts water-based chromium-free passivation coating.

[0009] Preferably, the thickness of the primer layer is 5-15 μm, the thickness of the back paint layer is 1-10 μm, and the thickness of the top paint layer is 5-15 μm.

[0010] Preferably, the primer layer is polyester paint or polyurethane paint.

[0011] Preferably, the back paint layer is epoxy ester paint, polyester paint or silicon compound paint.

[0012] The beneficial effects of the utility model are:

[0013] The utility model adopts the method of applying corresponding paint after the steel plate with the concave-convex texture grooves is pressed, thereby avoiding the damage to the paint layer caused by pressing the concave-convex texture grooves with a steel roller after painting, thereby making the metal substrate contact with the outside air, reducing the service life of the metal substrate, and also reducing the aesthetics of the product. Moreover, the concave-convex texture grooves can adopt regular geometric texture grooves, texture grooves with brushed effects, and texture grooves with 3D stereoscopic effects, thereby increasing the diversity of the product.

[0014] The utility model is that after the steel plate substrate is first pressed with different concave and convex textures by an embossing roller, the concave and convex textured surface of the steel plate after single-side embossing is successively coated with primer and topcoat by a roller through the PCM process to produce a single-side embossed PCM steel plate. The single-side embossed PCM steel plate which is embossed before being coated avoids damage to the paint on the steel plate surface caused by the embossing roller, and greatly improves the stamping and bending performance and corrosion resistance of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a partial main view cutaway structural diagram of the utility model;

[0016] Figure 2 This utility model Figure 1 Schematic diagram of the right view of the section at AA in the middle;

[0017] In the figure, 1-print control module; 2-bottom shell lining; 3-bottom shell outer shell; 4-rotating shaft slot; 5-upper cover outer shell; 6-upper cover lining. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Refer to the instruction manual Figure 1 、 2 A post-coated single-sided embossed PCM steel plate is divided into a first paint layer, a metal substrate 1 and a second paint layer in the thickness direction. A chemical treatment layer 6 is provided between the first paint layer and the metal substrate 1 and between the second paint layer and the metal substrate 1.

[0020] The chemical treatment layer 6 generally adopts water-based chromium-free passivation coating. The metal coil sheet of 0.25-2.5mm is uncoiled and cleaned and dried. After cleaning and drying, the water-based chromium-free passivation coating is evenly applied on the extended surface of the metal coil sheet by roller coating, and the metal coil sheet is alkaline cleaned.

[0021] The first paint layer includes a primer layer 3 and a topcoat layer 4. The primer layer 3 can be made of polyester paint, polyurethane paint, or a mixture of the above two paints. The primer layer 3 can be solid color, single color, silver effect, or fantasy color effect. The color of the color-coated board is enriched by the color of the primer layer 3.

[0022] The thickness of the primer layer 3 is 5-15 μm. The primer layer 3 is applied to the surface of the metal substrate 1 by a rubber roller. Before the primer layer 3 is applied, the surface of the metal substrate 1 is pressed by a steel embossing roller to form a concave-convex texture groove 2. After the surface of the metal substrate 1 is pressed by the steel embossing roller, the concave-convex texture groove 2 is controlled to be 0.03-0.08 mm thick.

[0023] The rubber roller coating is adopted because the rubber roller itself has a certain elasticity, so the primer layer 3 can be more evenly covered on the surface of the metal substrate 1 during the roller coating process.

[0024] Applying the primer layer 3 after the steel embossing roller has pressed the concave-convex grooves 2 on the metal substrate 1 is beneficial to preventing the primer layer 3 from being damaged by pressing the concave-convex grooves 2 after the primer layer 3 is applied.

[0025] When the primer layer 3 is roller-coated, the back paint layer 5 is roller-coated simultaneously. The back paint layer 5 is used to protect the other side of the metal substrate 1. The thickness of the back paint layer 5 is 1-10 μm. After the primer layer 3 and the back paint layer 5 are roller-coated, the metal substrate 1 is dried in a drying tunnel at a drying temperature of 200-260°C.

[0026] After drying, the outer side of the primer layer 3 is coated with a decorative topcoat by roller coating and is also dried again in a drying tunnel at a drying temperature of 200-260°C.

[0027] The utility model adopts the method of applying corresponding paint after pressing the concave-convex texture grooves 2 on the steel plate, thereby avoiding damage to the paint layer caused by pressing the concave-convex texture grooves 2 with a steel roller after painting, thereby making the metal substrate 1 contact with the outside air, reducing the service life of the metal substrate 1, and also reducing the aesthetics of the product. Moreover, the concave-convex texture grooves 2 can adopt regular geometric texture grooves, texture grooves with brushed effects, and texture grooves with 3D stereoscopic effects, thereby increasing the diversity of the product.

[0028] The utility model is that after the steel plate substrate is first pressed with different concave and convex textures by an embossing roller, the concave and convex textured surface of the steel plate after single-side embossing is successively coated with primer and topcoat by a roller through the PCM process to produce a single-side embossed PCM steel plate. The single-side embossed PCM steel plate which is embossed before being coated avoids damage to the paint on the steel plate surface caused by the embossing roller, and greatly improves the stamping and bending performance and corrosion resistance of the steel plate.

Claims

1. A post-coating single-sided embossed PCM steel plate, characterized in that: The invention comprises a first paint layer, a metal substrate (1) and a second paint layer which are sequentially arranged in the thickness direction; the contact surface between the metal substrate (1) and the first paint layer is pressed with a concave-convex texture groove (2) by an embossing roller; the first paint layer comprises a primer layer (3) and a topcoat layer (4); the primer layer (3) is applied to the surface of the metal substrate (1) by a rubber roller.

2. The post-coating single-sided embossed PCM steel sheet according to claim 1, characterized in that: The second paint layer comprises a back paint layer (5) coated on the side of the metal substrate (1) facing away from the concave-convex texture groove (2), and a chemical treatment layer (6) is provided between the back paint layer (5) and the primer layer (3) and the surface of the metal substrate (1).

3. The post-coating single-sided embossed PCM steel sheet according to claim 2, characterized in that: The depth of the concave-convex texture groove (2) is 0.03-0.08 mm.

4. The post-coating single-sided embossed PCM steel sheet according to claim 2, characterized in that: The chemical treatment layer (6) adopts water-based chromium-free passivation paint.

5. The post-coating single-sided embossed PCM steel sheet according to claim 4, characterized in that: The thickness of the primer layer (3) is 5-15 μm, the thickness of the back paint layer (5) is 1-10 μm, and the thickness of the top paint layer (4) is 5-15 μm.

6. The post-coating single-sided embossed PCM steel sheet according to claim 1, characterized in that: The primer layer (3) is polyester paint or polyurethane paint.

7. The post-coating single-sided embossed PCM steel sheet according to claim 2, characterized in that: The back paint layer (5) is epoxy ester paint, polyester paint or silicon compound paint.

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