Pressurized extrusion all-water-based paint composite stainless steel plate and manufacturing equipment thereof

Abstract

The utility model discloses a supercharged extrusion full-water-based paint composite stainless steel plate and manufacturing equipment thereof, and the composite stainless steel plate comprises a stainless steel base material layer, a plasma treatment layer, a passivation layer, a solvent-free water-based primer layer, a solvent-free water-based finish paint layer and a protective film layer are sequentially arranged on one surface of the stainless steel base material layer in the thickness direction from inside to outside. The manufacturing equipment comprises an input mechanism, a carrier roller, a baffle, a spray pipe, a head cutter, a booster pump and an output mechanism. The solvent-free water-based primer layer and the solvent-free water-based finish paint layer are formed by spraying and processing in a pressurizing extrusion mode of a booster pump, and compared with a coating mode in the prior art, on one hand, the surface is smoother and smoother, the thickness uniformity is better, and the product quality is better; on the other hand, the combination between the solvent-free water-based primer layer and the stainless steel base material layer and the combination between the solvent-free water-based primer layer and the solvent-free water-based finish paint layer are firmer, and the service life of the product can be prolonged. The manufacturing equipment is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of coating metal plate manufacturing, in particular to a pressurized extruded all-water-based paint composite stainless steel plate and manufacturing equipment thereof. Background Art

[0002] Metal plates are widely used in industry and life, and are needed in automobiles, home appliances, high-end furniture, kitchen equipment, industrial and civil buildings and other fields. Generally, metals need to be coated with a protective layer or a decorative layer on their surface before they can be used as formal products.

[0003] Existing composite metal plates generally use aluminum plates, stainless steel plates or stainless iron plates as substrates, and then some functional layers are arranged on both sides of the substrates. For example, China's public patent document number CN217803723U discloses a composite metal plate, which is provided with a protective film layer, a nano water-based polyurethane paint layer, a nano polyurethane primer layer, a first polymer insulation layer, a metal substrate layer, a second polymer insulation layer and a water-based anti-corrosion protective layer from top to bottom; the protective film layer is combined with the nano water-based polyurethane paint layer by lamination. The metal substrate can be an aluminum plate, a stainless steel plate or a stainless iron plate. In the composite plate of the above technical solution, the nano water-based polyurethane paint layer and the nano polyurethane primer layer are both applied by conventional paint coating process. The problem with the paint layer applied by such conventional coating process is that the surface finish is poor and the thickness is difficult to maintain uniformity, which leads to poor product appearance quality. Therefore, it is necessary to provide a new manufacturing equipment to solve the above technical problems. Utility Model Content

[0004] In order to solve at least one of the above-mentioned technical problems, the utility model aims to provide a pressurized extruded all-water-based paint composite stainless steel plate and a manufacturing device thereof.

[0005] Based on the above problems, the technical solution provided by the utility model is:

[0006] One purpose of the utility model is to provide a pressurized extruded all-water-based paint composite stainless steel plate, comprising a stainless steel substrate layer, on one surface of the stainless steel substrate layer in the thickness direction of which a plasma treatment layer, a passivation layer, a solvent-free water-based primer layer, a solvent-free water-based topcoat layer and a protective film layer are sequentially arranged from the inside to the outside.

[0007] In some embodiments, the solvent-free water-based primer layer is sprayed and bonded to the passivation layer by means of a booster pump pressurized extrusion method.

[0008] In some embodiments, the solvent-free water-based topcoat layer is sprayed and bonded to the solvent-free water-based primer layer by means of booster pump pressurized extrusion.

[0009] In some embodiments, the material of the stainless steel substrate layer is 2 series stainless iron, 4 series stainless iron or 3 series stainless steel; and / or

[0010] The protective film layer is a PE protective film.

[0011] Another object of the utility model is to provide a manufacturing device for pressurized extrusion of all-water-based paint composite stainless steel plate, including an input mechanism, a roller, a baffle, a nozzle, a head knife, a booster pump and an output mechanism, wherein the input mechanism is used to convey the stainless steel substrate to be sprayed with paint toward the roller, the roller is arranged between the input mechanism and the output mechanism and is located obliquely above the input mechanism, the roller is used to support the stainless steel substrate and change the conveying direction of the stainless steel substrate, the stainless steel substrate has a surface to be sprayed and a contact surface opposite to the surface to be sprayed and in sliding contact with the outer peripheral surface of the roller, the baffle can be movably arranged above the roller and defines a space between the surface to be sprayed of the stainless steel substrate to be sprayed on the roller to prevent the sprayed paint from being sprayed The spraying position slides down the gap, the nozzle is movably arranged above the stainless steel substrate to be sprayed with paint on the roller and is close to the output mechanism side relative to the baffle and the side of the nozzle facing the stainless steel substrate is provided with a spray hole, the nozzle is used to fill the paint and is connected to the outlet end of the booster pump, the booster pump is used to increase the pressure in the nozzle so that the paint in the nozzle is squeezed out and sprayed on the surface to be sprayed, the head knife can rotate around its axis and can be movably arranged in the direction of approaching or moving away from the sprayed stainless steel substrate above the stainless steel substrate and on one side of the output mechanism to control the thickness of the paint on the surface to be sprayed, the axis of the head knife is parallel to the axis of the roller, and the output mechanism is used to output the stainless steel substrate sprayed with paint.

[0012] In some embodiments, the baffle can move closer to or away from the roller along the radial direction of the roller; and / or,

[0013] The baffle can move toward or away from the roller in a horizontal direction; and / or,

[0014] The baffle can move along the tangent direction of the arc surface where the roller contacts the stainless steel substrate.

[0015] In some of the embodiments, the input mechanism is an unwinding wheel, and the output mechanism is a row of conveying rollers arranged with gaps in a horizontal direction.

[0016] In some of the embodiments, the axial direction of the nozzle is parallel to the axial direction of the roller, and a row of the nozzle holes is provided at intervals along the axial direction of the nozzle on a surface of the nozzle facing the roller.

[0017] In some of the embodiments, the cross-section of the head knife includes a circular knife body and at least two spaced-apart and outwardly protruding protrusions integrally formed along the outer circumferential surface of the knife body, the outer edge of any of the protrusions is arc-shaped, and the inner edge of the protrusion and the outer edge of the knife body define a accommodating cavity for accommodating scraped paint.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] The pressurized extruded all-water-based paint composite stainless steel plate of the utility model, the solvent-free water-based primer layer and the solvent-free water-based topcoat layer are all sprayed and processed by the pressurized extrusion method of the booster pump. Compared with the coating method in the prior art, on the one hand, the surface is smoother and flatter, the thickness is more uniform, and the product quality is better; on the other hand, the combination of the solvent-free water-based primer layer and the stainless steel substrate layer and the solvent-free water-based topcoat layer is more firm, which can improve the service life of the product. The manufacturing equipment has a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic structural diagram of the manufacturing equipment of the utility model for pressurized extrusion of all-water-based paint composite stainless steel plate.

[0022] Figure 2 This is a schematic structural diagram of the utility model of a pressurized extruded all-water-based paint composite stainless steel plate.

[0023] in:

[0024] 10. Input mechanism; 20. Roller; 30. Baffle; 40. Nozzle; 41. Spray hole; 50. Head knife; 51. Knife body; 52. Protrusion; 53. Accommodating cavity; 60. Composite stainless steel plate; 61. Stainless steel substrate layer; 62. Plasma treatment layer; 63. Passivation layer; 64. Solvent-free water-based primer layer; 65. Solvent-free water-based topcoat layer; 66. Protective film layer; 70. Paint. DETAILED DESCRIPTION

[0025] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0026] A supercharged extruded all-water-based paint composite stainless steel plate 60 according to an embodiment of the utility model, see Figure 2 , from bottom to top, it includes a stainless steel substrate layer 61, a plasma treatment layer 62, a passivation layer 63, a solvent-free water-based primer layer 64, a solvent-free water-based topcoat layer 65 and a protective film layer 66. After the stainless steel substrate layer 61 is degreased with alkali solution, it is then treated with plasma. On the one hand, the surface of the stainless steel substrate layer 61 can be further cleaned to remove other impurities that are not removed by the alkali solution. On the other hand, the surface of the stainless steel substrate layer 61 can be modified to form a plasma treatment layer 62 on one side of the stainless steel substrate layer 61 (such as a protrusion, which can increase its surface roughness to facilitate the processing of subsequent functional layers, such as the attachment of the passivation layer), and then a passivation treatment is performed on the plasma treatment layer 62 to obtain a passivation layer 63. The formation of the passivation layer 63 is to enable the subsequent solvent-free water-based primer layer 64 to be better combined with the stainless steel substrate layer 61. The solvent-free water-based primer layer 64 and the solvent-free water-based topcoat layer 65 are sprayed on the passivation layer 63 in turn by a booster pump pressurized extrusion method. The protective film layer 66 can be selected as an existing conventional PE protective film, and can be optionally combined with the solvent-free water-based topcoat layer 65 by pressing through existing conventional pressing tools to protect the solvent-free water-based topcoat layer 65 to avoid bumps and damages during handling and transportation.

[0027] Among them, the stainless steel substrate layer 61 can be selected from conventional 2 series stainless steel on the market, such as 201, etc., which are common on the market, 4 series stainless steel, such as 430, etc., which are common on the market, or 3 series stainless steel, such as 304, 321, etc., which are common on the market. Specific technicians in this field can choose according to the purpose of the formal product. There is no limitation on the thickness of the stainless steel substrate, which can be selected as 0.2-1.0mm. There is no description or limitation on the thickness of the passivation layer 63. Those skilled in the art can use the conventional passivation solution on the market for treatment, and the thickness is selected according to actual needs. There is no description or limitation on the thickness of the plasma treatment layer 62. It can be processed by conventional plasma treatment equipment, and the thickness is selected and designed according to actual needs. As for the paint materials of the solvent-free water-based primer layer 64 and the solvent-free water-based topcoat layer 65, no special description or limitation is made. It is preferred to use environmentally friendly solvent-free water-based paint commonly available on the market. The specific composition is not described or limited, and the thickness is not particularly limited. Those skilled in the art can select and design according to actual needs. It is preferred that the thickness of the solvent-free water-based topcoat layer 65 is greater than or equal to the thickness of the solvent-free water-based primer layer 64. The use of water-based paint is more environmentally friendly.

[0028] In addition, it should be noted that Figure 2 The thickness shown for each layer shown in the figure does not represent its actual thickness.

[0029] The present invention also provides a manufacturing device for preparing the composite stainless steel plate 60 of the above embodiment, and specifically for spraying the solvent-free water-based primer layer 64 and the solvent-free water-based topcoat layer 65 of the composite stainless steel plate 60 of the above embodiment. Figure 1 The manufacturing equipment includes an input mechanism 10, a roller 20, a baffle 30, a nozzle 40, a booster pump (not shown), a head knife 50 and an output mechanism (not shown). The two surfaces of the stainless steel substrate to be sprayed with paint in the thickness direction are respectively implemented as the spraying surface to be sprayed with paint and the contact surface opposite to the spraying surface. The input mechanism 10, the roller 20 and the output mechanism are arranged along the conveying direction ( Figure 1The baffle 30, the nozzle 40 and the head knife 50 are sequentially arranged above the roller 20 along the conveying direction, more specifically above one side of the surface to be sprayed. The input mechanism 10 is used to convey the stainless steel substrate to be sprayed with paint toward the roller 20 and the output mechanism. The roller 20 is used to support the stainless steel substrate and change its conveying direction. The contact surface of the stainless steel substrate is in sliding contact with the outer peripheral surface of the roller 20 (the roller 20 can be actively rotated or passively rotated) and is supported by the roller 20. The setting of the roller 20 is also used to change the conveying direction of the stainless steel substrate, so that the sprayed stainless steel substrate is conveyed out in the horizontal direction to prevent the sprayed paint from wrinkling or even sticking together and affecting the surface finish. The baffle 30 can be movably arranged on the right side above the roller 20, and its purpose is to define a gap between the surface to be sprayed of the stainless steel substrate on the roller 20, that is, the baffle 30 does not contact the surface to be sprayed of the stainless steel substrate, so as to avoid scratching the surface of the stainless steel substrate and not affecting the conveying of the stainless steel substrate. It should be noted that the size of the gap is not particularly limited, and is mainly determined by the viscosity of the paint. The larger the viscosity, the larger the gap can be, and the smaller the viscosity, the smaller the gap can be. Its main purpose is to prevent the paint from splashing onto the surface to be sprayed at the rear end of the conveying direction when the paint is sprayed to the spraying position of the surface to be sprayed by pressurized extrusion, thereby affecting the thickness uniformity of the paint layer on the entire stainless steel substrate. On the other hand, since the outer peripheral surface of the roller 20 is arc-shaped, the contact position between the stainless steel substrate and the roller forms an arc surface, and the paint may flow along the arc surface toward the surface to be sprayed at the rear end of the conveying direction. The existence of the gap can also prevent the paint from falling backward along the arc surface. A spray hole 41 is provided on the side of the nozzle 40 facing the surface to be sprayed, that is, the spray hole 41 is facing the spraying position of the surface to be sprayed, and there is paint in the nozzle 40. The outlet end of the booster pump is connected to the nozzle 40, which is used to apply pressure to the nozzle 40 to increase the pressure in the nozzle 40. Under the action of the booster, the paint in the nozzle 40 is squeezed out from the nozzle hole 41 and sprayed onto the surface to be sprayed (in fact, the paint sprayed from the nozzle 40 will accumulate on the upper surface of the arc surface where the baffle 30, the stainless steel substrate layer and the roller 20 are in contact, such as Figure 1The arc position at the mark 70 shown in the figure, and the amount of paint sprayed by the nozzle 40 is greater than the amount required for the actual thickness of the paint layer on the surface to be sprayed. Under the action of the head cutter 50, the excess paint is scraped off and flows out from the side). Under the action of pressure, gravity and water evaporation, the paint is firmly attached to the surface to be sprayed of the stainless steel substrate. Since the stainless steel substrate continues to move forward in the direction of the output mechanism, the spraying of the entire stainless steel substrate to be sprayed can be achieved. Moreover, the booster pump is used for pressurization. Under constant pressure, the amount of paint sprayed by the nozzle 40 is constant, so that the thickness of the paint layer is uniform and smooth. The head cutter 50 can rotate around its axis and can be moved toward the direction of the stainless steel substrate that has been sprayed with paint close to the stainless steel substrate or away from the stainless steel substrate. The thickness of the paint layer is controlled by setting a gap between the outer peripheral surface of the head cutter 50 and the paint surface of the stainless steel substrate that has been sprayed with paint. That is to say, the distance between the head cutter 50 and the paint surface of the stainless steel substrate is adjusted according to the designed thickness of the paint layer. The thickness of the paint layer sprayed onto the surface to be sprayed by general boost extrusion is slightly greater than the designed thickness of the paint layer. The spraying thickness can be controlled by adjusting the pressure of the boost pump. When the thickness is too high, adjust the head cutter 50 close to the painted surface of the stainless steel substrate until the designed thickness of the paint layer is reached. The head cutter 50 will scrape off the paint that exceeds the thickness, thereby ensuring that the thickness of the paint layer meets the design requirements. The output mechanism transports the stainless steel substrate that has been sprayed and whose thickness is controlled to meet the design requirements to the workstation of the next process.

[0030] Preferably, in the figure, the input mechanism 10 is an unwinding wheel, and the stainless steel substrate to be sprayed with paint is wound on the unwinding wheel. Due to its heavy weight, the position of the input mechanism 10 is relatively low, and the roller 20 is arranged at the upper left of the input mechanism 10. The contact surface of the stainless steel substrate to be sprayed with paint bypasses the upper surface of the roller 20 and is output horizontally to the left by the output mechanism. The output mechanism is preferably a row of horizontal and spaced conveyor rollers. The conveyor roller preferably has a driving mechanism so that the stainless steel substrate can move forward continuously. Optionally, the conveyor roller may not have a driving mechanism, but rotate passively, while the roller adopts the form of active rotation, that is, has a driving mechanism. Of course, the conveyor roller may have a driving mechanism, and the roller may also have a driving mechanism.

[0031] There is no special limitation on the material of the baffle 30, which can be a conventional composite material plate that does not react with the chemical components in the paint. It will not be described in detail, as it is easy for those skilled in the art to know and implement. The baffle 30 can be designed to move radially toward or away from the stainless steel substrate on the roller 20, mainly to adjust the size of the gap according to the viscosity of the paint to be sprayed, to ensure that the paint does not fall off. As an alternative embodiment, the baffle 30 can also move horizontally toward or away from the stainless steel substrate on the roller 20. As another alternative embodiment, the baffle 30 can move along the tangent direction of the arc surface where the roller 20 contacts the stainless steel substrate.

[0032] For the nozzle 40, preferably, the axis of the nozzle 40 is parallel to the axis of the roller 20, and a row of spray holes 41 arranged along the axis direction of the nozzle 40 facing the surface of the stainless steel substrate to be sprayed on the roller 20 is provided. Preferably, the length of the nozzle 40 can be designed to be consistent with the width of the stainless steel substrate or slightly longer than the width of the stainless steel substrate, so that the entire surface of the position to be sprayed can be completed at one time. As an alternative, the length of the nozzle 40 can also be designed to be smaller than the width of the stainless steel substrate, in which case the nozzle 40 can be set to be movable along the width direction of the stainless steel substrate.

[0033] The material of the nozzle 40 is not particularly limited, and can be a material that does not react with the chemical components in the sprayed paint. The booster pump is not particularly described or limited, and can be a conventional booster pump on the market. The pressure applied to the paint by the booster pump is also not limited, and an appropriate pressure can be selected according to the characteristics of the paint and the thickness of the paint layer.

[0034] For the head blade 50, if Figure 1As shown, its cross section includes a circular blade body 51 and at least two (two are shown in the figure, and the overall structure is a central symmetrical structure) spaced and outwardly protruding protrusions 52 integrally formed along the outer peripheral surface of the blade body 51, the outer edge of any protrusion 52 is arc-shaped, the axis of the blade body 51 is parallel to the axis of the roller 20, and the inner edge of the protrusion 52 and the outer edge of the blade body 51 define a receiving cavity 53 that can accommodate the scraped paint. The design of the protrusion 52 facilitates the scraping of the paint layer, that is, the thickness of the paint layer can be better controlled, and the arc-shaped design of the outer edge ensures the surface finish and flatness of the paint layer. The receiving cavity 53 defined by the inner edge of the protrusion 52 and the outer edge of the blade body 51 can also store the scraped paint to prevent the paint from falling to other positions on the paint surface and causing uneven thickness of the paint layer. The receiving cavity 53 is roughly semicircular, which can store excess paint or make the excess paint flow out from both sides along the axis direction of the blade body 51. Optionally, a paint waste liquid collection tank (not shown) is provided at the left end of the head cutter 50 and above the stainless steel substrate on the output mechanism that has been sprayed with paint. When the head cutter 50 rotates to the upper left end, the paint in the accommodating cavity 53 will be thrown out of the accommodating cavity 53 under the action of centrifugal force. Optionally, the head cutter 50 is not configured to rotate actively, but to rotate passively when the paint is too high. That is to say, the rotation speed of the head cutter 50 is very low, and the paint in the accommodating cavity 53 will not be thrown out. It only needs to be manually cleaned from time to time or when the paint is water-based paint, the viscosity of the paint can flow out from both sides of the accommodating cavity 53 along the axial direction of the cutter body 51, without adding a waste liquid collection tank or adding a waste liquid collection tank on both sides.

[0035] The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A supercharged extruded all-water-based paint composite stainless steel plate, characterized in that: It comprises a stainless steel substrate layer, on one surface of which a plasma treatment layer, a passivation layer, a solvent-free water-based primer layer, a solvent-free water-based topcoat layer and a protective film layer are sequentially arranged from inside to outside.

2. The composite stainless steel plate according to claim 1, characterized in that: The solvent-free water-based primer layer is sprayed and bonded on the passivation layer by means of a booster pump pressurized extrusion method.

3. The composite stainless steel plate according to claim 2, characterized in that: The solvent-free water-based topcoat layer is sprayed and bonded on the solvent-free water-based primer layer by means of a booster pump pressurized extrusion method.

4. The composite stainless steel plate according to claim 1, characterized in that: The material of the stainless steel substrate layer is 2 series stainless iron, 4 series stainless iron or 3 series stainless steel; and / or The protective film layer is a PE protective film.

5. A manufacturing device for pressurized extrusion of all-water-based paint composite stainless steel plate, characterized in that: It includes input mechanism, roller, baffle, nozzle, head knife, booster pump and output mechanism; The input mechanism is used to convey the stainless steel substrate to be sprayed with paint toward the roller, and the roller is arranged between the input mechanism and the output mechanism and is located obliquely above the input mechanism; the roller is used to support the stainless steel substrate and change the conveying direction of the stainless steel substrate, and the stainless steel substrate has a surface to be sprayed and a contact surface opposite to the surface to be sprayed and in sliding contact with the outer peripheral surface of the roller; the baffle is movably arranged above the roller and defines a gap between the surface to be sprayed of the stainless steel substrate to be sprayed with paint on the roller to prevent the sprayed paint from sliding off the spraying position; the nozzle is movably arranged on the roller to prevent the paint to be sprayed from slipping off the spraying position A spray hole is provided above the stainless steel substrate and relative to the baffle plate, close to the output mechanism, and on a side of the nozzle facing the stainless steel substrate; the nozzle is used to fill paint and is connected to the outlet end of the booster pump; the booster pump is used to increase the pressure in the nozzle so that the paint in the nozzle is squeezed out and sprayed onto the surface to be sprayed; the head knife can rotate around its axis and can be moved in a direction close to or away from the sprayed stainless steel substrate, and is arranged above the stainless steel substrate and on one side of the output mechanism to control the thickness of the paint on the surface to be sprayed, and the axis of the head knife is parallel to the axis of the roller; the output mechanism is used to output the stainless steel substrate sprayed with paint.

6. The manufacturing equipment according to claim 5, characterized in that The baffle can move closer to or away from the roller along the radial direction of the roller; and / or, The baffle can move toward or away from the roller in a horizontal direction; and / or, The baffle can move along the tangent direction of the arc surface where the roller contacts the stainless steel substrate.

7. The manufacturing equipment according to claim 5, characterized in that The input mechanism is an unwinding wheel, and the output mechanism is a row of conveying rollers arranged at intervals in the horizontal direction.

8. The manufacturing equipment according to claim 5, characterized in that The axial direction of the nozzle is parallel to the axial direction of the roller, and a row of nozzle holes is provided at intervals along the axial direction of the nozzle on a surface of the nozzle facing the roller.

9. The manufacturing equipment according to claim 5, characterized in that The cross-section of the head knife includes a circular knife body and at least two spaced and outwardly protruding protrusions integrally formed along the outer circumferential surface of the knife body, the outer edge of any of the protrusions is arc-shaped, and the inner edge of the protrusion and the outer edge of the knife body define a accommodating cavity that can accommodate scraped paint.

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