A pre-coated plate and its preparation process

Abstract

This invention discloses a pre-coated plate and its preparation process, comprising a skeleton plate, an upper coating layer, an internal partition, a lower coating layer, and an abutment ring. This invention changes the structure of the traditional pre-coated plate. The abutment ring, internal partition, and intermediate plate of the pre-coated plate form an internal coating cavity. The upper coating groove is connected to the internal coating cavity through the guide hole of the intermediate plate. The upper coating layer is filled into the upper coating groove, guide hole, and internal coating cavity, achieving a tight coating connection between the upper coating layer and the outer, middle, and inner sides of the intermediate plate, forming a snap-fit ​​structure between the upper coating layer and the intermediate plate, thereby improving the adhesion strength between the upper coating layer and the intermediate plate.

Description

Technical Field

[0001] This invention relates to a pre-coated plate and its preparation process. Background Technology

[0002] Pre-coated steel sheets are steel products with a certain degree of corrosion resistance and aesthetic appeal, and are brightly colored. They can be directly processed into finished components without the need for rust-proofing coating and coloring after forming. Pre-coated sheets are used to manufacture components or for direct application, offering a paint-free experience. Therefore, they are widely used in construction, home appliances, and home decoration. Their structure typically involves applying various organic coatings to the surface of the sheet. However, because the coating and the sheet are bonded layer by layer, the coating may detach after a period of use, leading to cumbersome maintenance. Furthermore, it is necessary to improve the thermal insulation performance of pre-coated sheets. Summary of the Invention

[0003] To address the shortcomings of the prior art, the present invention provides a pre-coated plate with strong adhesion between the surface coating and the plate body and good heat insulation effect, as well as its preparation process.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A pre-coated plate includes a skeleton plate, an upper coating layer, an inner partition plate, a lower coating layer, and an abutting ring. The skeleton plate includes a middle plate, an upper annular protrusion, and a lower annular protrusion. Multiple flow-guiding holes are evenly distributed on the middle plate. An upper annular protrusion is installed around the upper perimeter of the middle plate. A lower annular protrusion is installed around the lower perimeter of the middle plate. The inner partition plate is installed inside the lower end of the skeleton plate. An abutting ring is installed around the upper perimeter of the inner partition plate. The upper end of the abutting ring abuts against the lower end face of the middle plate. The inner partition is fixedly connected to the inner periphery of the lower annular convex edge around the periphery; the abutting ring, the inner partition, and the intermediate plate form an internal coating cavity; the upper end face of the intermediate plate and the upper annular convex edge form an upper coating groove; the upper coating groove communicates with the internal coating cavity through the guide hole of the intermediate plate; the lower end face of the inner partition and the lower annular convex edge form a lower coating groove; the upper coating layer fills the upper coating groove, the guide hole, and the internal coating cavity; the lower coating layer fills the lower coating groove.

[0006] Furthermore, the inner periphery of the lower annular convex edge is provided with an annular platform; the annular platform is provided with a plurality of threaded holes evenly distributed; the periphery of the inner partition is provided with insertion holes evenly distributed; the upper periphery of the inner partition is in contact with the annular platform; the insertion holes around the inner partition correspond one-to-one with the threaded holes on the annular platform; the insertion holes around the inner partition and the threaded holes on the annular platform are respectively fixed by bolts.

[0007] Furthermore, the upper coating is a polyurethane coating.

[0008] Furthermore, the components and weight parts of the lower coating are: 100 parts epoxy resin, 20 to 30 parts dispersant, and 10 to 15 parts aluminum oxide.

[0009] Furthermore, the internal partition is made of fiberglass board.

[0010] Furthermore, the frame plate is a steel plate or an aluminum alloy plate.

[0011] Furthermore, the abutment ring is made of plastic.

[0012] A process for preparing a pre-coated plate includes the following steps:

[0013] S1. Skeleton plate forming: The casting material of the skeleton plate is injected into the mold, hot-pressed and cooled to solidify, resulting in a skeleton plate composed of a middle plate, an upper annular convex edge and a lower annular convex edge. The middle plate has multiple guide holes, and multiple threaded holes are evenly provided on the annular platform around the lower side of the skeleton plate.

[0014] S2, Opening and bonding: Make multiple holes evenly around the perimeter of the inner partition, and bond an abutment ring to the upper side of the inner partition.

[0015] S3. Assembly: Install the internal partition plate inside the lower side of the skeleton plate, so that the upper end face of the abutting ring abuts against the lower periphery of the middle plate of the skeleton plate; the multiple insertion holes around the internal partition plate correspond one-to-one with the multiple threaded holes around the lower periphery of the skeleton plate, and are fixedly assembled with bolts; thus, the abutting ring, the internal partition plate, and the middle plate form an internal coating cavity, the upper end face of the middle plate and the upper annular protrusion form an upper coating groove, the upper coating groove is connected to the internal coating cavity through the guide hole of the middle plate, and the lower end face of the internal partition plate and the lower annular protrusion form a lower coating groove.

[0016] S4. Lower coating casting: The lower coating casting material is poured into the lower coating groove, scraped off the end face of the lower annular convex edge by a scraper, and then dried, cooled and shaped.

[0017] S5. Top Coating Casting: The top coating is cast sequentially into the internal coating cavity, guide hole, and top coating groove. After scraping the material on the upper annular convex edge end face with a scraper, it is dried, cooled, and shaped.

[0018] Furthermore, the components and weight parts of the lower coating in step S4 are: 100 parts epoxy resin, 20 to 30 parts dispersant, and 10 to 15 parts aluminum oxide; the components of the lower coating are added to water and stirred, and the weight ratio of each component to water is controlled to be 10:1.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention changes the structure of the traditional pre-coated plate. The abutting ring, internal partition, and intermediate plate of the pre-coated plate form an internal coating cavity. The upper coating groove is connected to the internal coating cavity through the guide hole of the intermediate plate. The upper coating layer is filled into the upper coating groove, guide hole, and internal coating cavity, realizing a tight coating connection between the upper coating layer and the outer, middle, and inner sides of the intermediate plate, forming a snap-fit ​​structure between the upper coating layer and the intermediate plate, thereby improving the adhesion strength between the upper coating layer and the intermediate plate.

[0021] 2. The present invention installs an internal partition inside the lower annular convex edge, thereby providing heat insulation through the internal partition. At the same time, the internal partition serves as a carrier for mounting and abutting the ring body, achieving the encapsulation of the internal coated cavity. The ingenious structural design achieves a synergistic improvement in heat insulation, sound insulation, and structural strength performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the disassembled structure of the skeleton plate, internal partition, and abutment ring of the present invention.

[0023] Figure 2 For the present invention Figure 1 A partially enlarged structural diagram.

[0024] Figure 3 This is a schematic diagram of the assembly structure of the skeleton plate, internal partition, and abutment ring of the present invention.

[0025] Figure 4 For the present invention Figure 3 A schematic diagram of the structure with an upper and lower coating layer. Detailed Implementation

[0026] The invention will now be described in further detail with reference to the accompanying drawings.

[0027] like Figures 1 to 4As shown, a pre-coated plate includes a skeleton plate 1, an upper coating layer 4, an inner partition plate 2, a lower coating layer 6, and an abutting ring 3. The skeleton plate 1 includes a middle plate 11, an upper annular protrusion 12, and a lower annular protrusion 13. Multiple guide holes 14 are evenly distributed on the middle plate 11. The upper annular protrusion 12 is installed around the upper periphery of the middle plate 11. The lower annular protrusion 13 is installed around the lower periphery of the middle plate 11. The inner partition plate 2 is installed inside the lower end of the skeleton plate 2. The abutting ring 3 is installed around the upper periphery of the inner partition plate 2. The upper end of the abutting ring 3 abuts against the lower periphery of the middle plate 11. The inner partition 2 is fixedly connected to the inner periphery of the lower annular protrusion 13. The abutting ring 3, the inner partition 2, and the intermediate plate 11 constitute an internal coating cavity 52. ​​The upper end face of the intermediate plate 11 and the upper annular protrusion 12 form an upper coating groove 51. The upper coating groove 51 is connected to the internal coating cavity 52 through the guide hole 14 of the intermediate plate 11. The lower end face of the inner partition 2 and the lower annular protrusion 13 form a lower coating groove 53. The upper coating layer 4 fills the upper coating groove 51, the guide hole 14, and the internal coating cavity 52. ​​The lower coating layer 6 fills the lower coating groove 53.

[0028] like Figures 1 to 4 As shown, to facilitate the assembly of the internal partition 2 with the lower annular protrusion 13 and the intermediate plate 11, it is further preferred that the inner periphery of the lower annular protrusion 13 is provided with an annular platform 15; the annular platform 15 is uniformly provided with a plurality of threaded holes 16; the internal partition 2 is uniformly provided with insertion holes 22 around its periphery; the upper periphery of the internal partition 2 is aligned with the annular platform 15; the insertion holes 22 around the internal partition 2 correspond one-to-one with the threaded holes 16 of the annular platform 15; the insertion holes 22 around the internal partition 2 and the threaded holes 16 of the annular platform 15 are respectively fixed by bolts 21. Further, the upper coating 4 is a polyurethane coating. Further, the components and weight parts of the lower coating 6 are: 100 parts epoxy resin, 25 parts dispersant, and 12 parts aluminum oxide. Further, the internal partition 2 is a fiberglass board. Further, the skeleton plate 1 is a steel plate or an aluminum alloy plate. Further, the abutment ring 3 is made of plastic.

[0029] A process for preparing a pre-coated plate includes the following steps:

[0030] S1. Skeleton plate forming: The casting material of skeleton plate 1 is injected into the mold, hot-pressed and cooled to solidify, resulting in skeleton plate 1 composed of middle plate 11, upper annular convex edge 12, and lower annular convex edge 13. The middle plate 11 has multiple guiding holes 14, and multiple threaded holes 16 are evenly provided on the annular platform 15 around the lower side of skeleton plate 1.

[0031] S2, Opening and bonding: Multiple insertion holes 22 are evenly opened around the perimeter of the inner partition 2, and an abutment ring 3 is bonded to the upper side of the inner partition 2.

[0032] S3. Assembly: Install the inner partition 2 inside the lower side of the frame plate 1, so that the upper end face of the abutting ring 3 abuts against the lower periphery of the middle plate 11 of the frame plate; the multiple insertion holes 22 around the inner partition 2 correspond one-to-one with the multiple threaded holes 16 around the lower periphery of the frame plate, and are fixedly assembled by bolts 21; the abutting ring 3, the inner partition 2, and the middle plate 11 form an inner coating cavity 52, the upper end face of the middle plate 11 and the upper annular protrusion 12 form an upper coating groove 51, the upper coating groove 51 communicates with the inner coating cavity 52 through the guide hole 14 of the middle plate 11, and the lower end face of the inner partition 2 and the lower annular protrusion 13 form a lower coating groove 53.

[0033] S4. Lower Coating Casting: The lower coating 6 casting material is cast into the lower coating groove 53. After scraping the material on the end face of the lower annular convex edge 13 with a scraper, it is dried, cooled and shaped. The components and weight parts of the lower coating in step S4 are: 100 parts epoxy resin, 25 parts dispersant, and 12 parts aluminum oxide. The components of the lower coating are added to water and stirred, and the weight ratio of each component to water is controlled to be 10:1.

[0034] S5. Top Coating Casting: The top coating 4 is cast and filled sequentially into the internal coating cavity 52, the guide hole 14, and the top coating groove 51. After scraping the material on the end face of the upper annular convex edge 12 with a scraper, it is dried, cooled, and shaped.

[0035] This invention changes the structure of the traditional pre-coated plate. The abutment ring 3, the inner partition 2, and the intermediate plate 11 of the pre-coated plate form an internal coating cavity 52. ​​The upper coating groove 51 is connected to the internal coating cavity 52 through the guide hole 14 of the intermediate plate 11. The upper coating 4 is filled into the upper coating groove 51, the guide hole 14, and the internal coating cavity 52, realizing a tight coating connection between the upper coating 4 and the outer, middle, and inner sides of the intermediate plate 11, forming a snap-fit ​​structure between the upper coating 4 and the intermediate plate 11, which improves the adhesion strength between the upper coating 4 and the intermediate plate 11.

[0036] The present invention installs an internal partition 2 inside the lower annular convex edge 13, thereby providing heat insulation through the internal partition 2. At the same time, the internal partition 2 serves as a carrier to install and abut the ring body 3, thereby encapsulating the internal coated cavity 52. ​​The ingenious structural design achieves a synergistic improvement in heat insulation, sound insulation, and structural strength performance.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A preparation process of a pre-coated plate, the pre-coated plate comprising a skeleton plate, an upper coating layer, an internal partition plate, a lower coating layer, and an abutting ring body; the skeleton plate comprising a middle plate body, an upper annular flange, and a lower annular flange; a plurality of flow guide through holes are uniformly arranged on the middle plate body; the upper annular flange is installed around the upper end of the middle plate body; the lower annular flange is installed around the lower end of the middle plate body; the internal partition plate is installed inside the lower end of the skeleton plate; the abutting ring body is installed around the upper end of the internal partition plate; the upper end of the abutting ring body abuts against the lower end surface of the middle plate body; the internal partition plate is fixedly connected with the inner side of the lower annular flange; the abutting ring body, the internal partition plate, and the middle plate body form an internal coating cavity; the upper end surface of the middle plate body and the upper annular flange form an upper coating groove; the upper coating groove is communicated with the internal coating cavity through the flow guide through holes of the middle plate body; the lower end surface of the internal partition plate and the lower annular flange form a lower coating groove; the upper coating layer is filled in the upper coating groove, the flow guide through holes, and the internal coating cavity; the lower coating layer is filled in the lower coating groove; the inner side of the lower annular flange is provided with an annular table surface; a plurality of threaded holes are uniformly arranged on the annular table surface; a plurality of insertion holes are uniformly arranged around the internal partition plate; the upper side of the internal partition plate is butted against the annular table surface; the insertion holes around the internal partition plate correspond to the threaded holes of the annular table surface one by one; the insertion holes around the internal partition plate and the threaded holes of the annular table surface are respectively fixedly connected through bolts; characterized in that, The pre-coated plate preparation step is as follows: S1, skeleton plate forming: pouring the pouring material of the skeleton plate into the mold, cooling and shaping after hot pressing to obtain a skeleton plate composed of an intermediate plate body, an upper annular flange and a lower annular flange, and the intermediate plate body has a plurality of flow guide through holes, and a plurality of threaded holes are uniformly arranged on the annular table around the lower side of the skeleton plate; S2, hole opening and bonding: a plurality of insertion holes are uniformly arranged around the inner partition plate, and an abutting ring body is bonded to the upper side of the inner partition plate; S3, assembly: the inner partition plate is installed on the lower side of the skeleton plate, so that the upper end surface of the abutting ring body abuts against the lower side of the intermediate plate body of the skeleton plate; the plurality of insertion holes around the inner partition plate correspond to the plurality of threaded holes around the lower side of the skeleton plate one by one, and are fixed and assembled by bolts; the abutting ring body, the inner partition plate and the intermediate plate body form an inner coating cavity, the upper end surface of the intermediate plate body and the upper annular flange form an upper coating groove, the upper coating groove is communicated with the inner coating cavity through the flow guide through hole of the intermediate plate body, and the lower end surface of the inner partition plate and the lower annular flange form a lower coating groove; S4, lower coating pouring: pouring the lower coating pouring material into the lower coating groove, scraping the material on the end surface of the lower annular flange by a scraper after drying and cooling, and shaping after drying and cooling; S5, upper coating pouring: the upper coating is poured and filled into the inner coating cavity, the flow guide through hole and the upper coating groove in sequence, and the material is scraped on the end surface of the upper annular flange by a scraper after drying and cooling, and shaping after drying and cooling.

2. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The upper coating is polyurethane paint.

3. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The components and weight parts of the lower coating are: 100 parts of epoxy resin, 20 to 30 parts of dispersing agent and 10 to 15 parts of aluminum oxide.

4. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The inner partition plate is a glass fiber plate.

5. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The skeleton plate is a steel plate or an aluminum alloy plate.

6. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The abutting ring body is made of plastic material.

7. The process for the preparation of pre-coated sheets according to claim 1, characterized in that, The components and weight parts of the lower coating in step S4 are: 100 parts of epoxy resin, 20 to 30 parts of dispersing agent and 10 to 15 parts of aluminum oxide; the components of the lower coating are added to water and stirred, and the weight ratio of the components to water is controlled to be 10:1.

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