A moisture-proof and antibacterial PVC decorative panel extrusion molding device

Abstract

This utility model relates to an extrusion molding device for moisture-proof and antibacterial PVC decorative panels, aiming to solve the technical problem that current extruders struggle to achieve uniform dispersion of nano-level moisture-proof and antibacterial materials in a PVC matrix, affecting material performance and failing to meet the processing requirements of special functional materials. The device includes: an extrusion mechanism with a hot melt box installed at one end and a molding mechanism connected to the other end via an extrusion pipe; and a dispersion mechanism located at the top of the hot melt box for uniform mixing of the moisture-proof and antibacterial materials with the PVC matrix. This utility model simultaneously injects the PVC matrix and moisture-proof and antibacterial nanomaterials into the mixing box through different flow channels, avoiding the material stratification problem caused by traditional single-inlet systems. It ensures initial mixing uniformity from the feeding source and uses a drive motor to drive a high-speed rotating drive disc to disperse and mix the simultaneously added materials, forming a nano-level monodisperse state in the PVC melt, thus improving the quality of the extrusion molding of moisture-proof and antibacterial PVC decorative panels.

Description

Technical Field

[0001] This utility model relates to the field of PVC decorative panel processing technology, specifically to a moisture-proof and antibacterial PVC decorative panel extrusion molding device. Background Technology

[0002] Traditional PVC decorative panels rely on adding ordinary desiccant or using simple moisture-proof coatings for moisture protection. However, these methods have significant drawbacks. Desiccant is prone to migration and loss over long-term use, leading to a gradual decline in its moisture-proof performance. Moisture-proof coatings may also peel off due to insufficient adhesion during handling, installation, and daily use, failing to maintain their moisture-proof effect. In humid environments such as kitchens, bathrooms, and basements, ordinary PVC decorative panels are highly susceptible to moisture, resulting in deformation, mold, and other problems. This severely affects their aesthetics and lifespan, and may even breed bacteria, posing a health risk.

[0003] Current technologies mostly employ the method of adding antibacterial agents to the PVC matrix. However, common organic antibacterial agents have poor stability and are easily decomposed and ineffective due to environmental factors such as light, temperature, and humidity. Inorganic antibacterial agents, while having better stability, suffer from poor dispersibility, making it difficult to distribute evenly within the PVC matrix. This results in inconsistent antibacterial effects and an inability to provide comprehensive and lasting inhibition and elimination of various common bacteria and molds. Moreover, most antibacterial PVC decorative panels only add antibacterial agents within the board, resulting in limited surface antibacterial capabilities and an inability to effectively address bacterial contamination transmitted through surface contact.

[0004] When producing PVC decorative panel extrusion equipment with moisture-proof and antibacterial functions, it is difficult for extruders to achieve uniform dispersion of nano-level moisture-proof and antibacterial materials within the PVC matrix, affecting the material's performance and failing to meet the processing requirements of special functional materials. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a moisture-proof and antibacterial PVC decorative panel extrusion molding device to solve the technical problem that the extruder is unable to achieve uniform dispersion of nano-level moisture-proof and antibacterial materials in the PVC matrix, which affects the performance of the material and fails to meet the processing requirements of special functional materials.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: designing a moisture-proof and antibacterial PVC decorative board extrusion molding device, comprising;

[0007] The extrusion mechanism has a hot melt box installed at one end and a forming mechanism connected to the other end through an extrusion tube;

[0008] A dispersion mechanism, located at the top of the hot melt box, is used to achieve uniform mixing of the moisture-proof and antibacterial material with the PVC matrix. The dispersion mechanism includes:

[0009] A mixing box connected to the top of the hot melt box, the top opening of the mixing box is provided with a box cover, the middle of the box cover is through the main material pipe with the bottom as the feeding end, and multiple auxiliary material pipes are equally spaced through the outside of the main material pipe;

[0010] A drive shaft, one end of which is rotatably connected to the top of the inner cavity of the main material tube via a sealed bearing, and the other end is fixedly connected to a drive disk, with multiple dispersion plates fixedly connected to the surface of the drive disk.

[0011] The drive assembly located at the top of the main material pipe is used to drive the drive disc to rotate and disperse and mix the added material.

[0012] Preferably, the drive assembly includes a drive motor fixedly connected to the top of the main material tube, and the drive end of the drive motor is connected to the drive shaft via a coupling.

[0013] Preferably, one end of the molding mechanism is connected to an air blowing pipe, the other end of the air blowing pipe is connected to a blower, and the end of the molding mechanism away from the air blowing pipe is connected to the hot melt box by an air guide pipe.

[0014] Preferably, the air duct is provided with a filter cylinder, the inner cavity of the filter cylinder is provided with a filter element for filtering hot air, and the filter cylinder is connected to the middle of the air duct via a flange.

[0015] Preferably, an exhaust fan is installed on the side of the air duct near the forming mechanism.

[0016] Preferably, a connecting shaft is fixedly connected to the end of the drive disk away from the dispersion plate, and a spiral blade is fixedly connected to the outer side of the connecting shaft.

[0017] Preferably, a fixing bolt passes through the top of the box cover, and the fixing bolt is threadedly connected to the top of the mixing box.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Multi-channel synchronous feeding: The annular distribution structure of the main material pipe and the auxiliary material pipe allows PVC matrix and moisture-proof and antibacterial nanomaterials (such as titanium dioxide antibacterial powder and nano montmorillonite moisture-proof filler) to be injected into the mixing box simultaneously from different channels, avoiding the material stratification problem caused by traditional single inlet, and ensuring the initial mixing uniformity from the source of feeding;

[0020] 2. Three-dimensional shear dispersion: When the material enters the mixing box, the drive motor drives the drive disc to rotate at high speed through the drive shaft. The dispersion plate forms a combined action field of radial centrifugal force and circumferential shear force with the drive disc, which disperses and mixes the material added at the same time, so that it forms a nanoscale monodisperse state in the PVC melt, thereby improving the quality of moisture-proof and antibacterial PVC decorative board extrusion molding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one side of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure on the other side of this utility model;

[0023] Figure 3 This is a schematic diagram of the external structure of the dispersing mechanism of this utility model;

[0024] Figure 4 This is a cross-sectional view of the dispersing mechanism of this utility model.

[0025] In the diagram: 1. Extrusion mechanism; 11. Hot melt box; 12. Extrusion tube; 13. Molding mechanism; 2. Dispersion mechanism; 21. Mixing box; 22. Box cover; 23. Main material tube; 24. Fixing bolt; 25. Drive motor; 26. Secondary material tube; 27. Drive shaft; 28. Drive disc; 29. ​​Dispersion plate; 210. Connecting shaft; 211. Spiral blade; 3. Blower; 31. Air duct; 32. Air guide duct; 33. Exhaust fan; 34. Filter cartridge; 35. Flange. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Example 1: A moisture-proof and antibacterial PVC decorative panel extrusion molding device, see [link to example]. Figures 1 to 4 ,include;

[0028] The extrusion mechanism 1 has a hot melt box 11 installed at one end and a forming mechanism 13 connected to the other end through an extrusion pipe 12. The extrusion mechanism 1 includes a screw (for material conveying, compression, plasticizing, and homogenization), a barrel (which works with the screw to achieve plasticizing and supports the heating / cooling system), a drive system (power source), and a heating / cooling system (temperature control core). The extrusion mechanism 1 is existing technology and will not be described in detail here. The forming mechanism 13 includes a die (for final shaping of the melt flow channel, determining the cross-sectional shape and size of the decorative panel), a calendering roller group (for calendering, thickness determination, and surface texture transfer of the extruded high-temperature melt plate), and a cooling and shaping die (for precise shape control of the plate under negative pressure and rapid cooling and shaping). The forming mechanism 13 is existing technology and will not be described in detail here.

[0029] The dispersion mechanism 2 is located at the top of the hot melt box 11 and is used to achieve uniform mixing of the moisture-proof and antibacterial materials with the PVC matrix.

[0030] A mixing box 21 is connected to the top of the hot melt box 11. The top opening of the mixing box 21 is provided with a box cover 22. The main material pipe 23 with the bottom as the feeding end is penetrated through the middle of the box cover 22. Multiple auxiliary material pipes 26 are equidistantly penetrated through the outside of the main material pipe 23.

[0031] The drive shaft 27 has one end rotatably connected to the top of the inner cavity of the main material tube 23 via a sealed bearing, and the other end is fixedly connected to the drive disk 28. Multiple dispersion plates 29 are fixedly connected to the surface of the drive disk 28.

[0032] The drive assembly located at the top of the main material tube 23 is used to drive the drive disk 28 to rotate and disperse and mix the added material. The drive assembly includes a drive motor 25 fixedly connected to the top of the main material tube 23. The drive end of the drive motor 25 is connected to the drive shaft 27 via a coupling.

[0033] This device, through the set dispersion mechanism 2, achieves the following during use:

[0034] Multi-channel synchronous feeding: The annular distribution structure of the main material pipe 23 and the auxiliary material pipe 26 allows the PVC matrix and moisture-proof and antibacterial nanomaterials (such as titanium dioxide antibacterial powder and nano montmorillonite moisture-proof filler) to be injected into the mixing box 21 simultaneously from different channels, avoiding the material stratification problem caused by the traditional single inlet, and ensuring the initial mixing uniformity from the source of feeding;

[0035] Three-dimensional shear dispersion: When the material enters the mixing box 21, the drive motor 25 drives the drive disk 28 to rotate at high speed through the drive shaft 27. The dispersion plate 29 forms a combined action field of radial centrifugal force and circumferential shear force with the drive disk 28, which disperses and mixes the material added at the same time, so that it forms a nanoscale monodisperse state in the PVC melt, thereby improving the quality of moisture-proof and antibacterial PVC decorative board extrusion molding.

[0036] For details, see Figure 1 and Figure 2 One end of the forming mechanism 13 is connected to a blower pipe 31, and the other end of the blower pipe 31 is connected to a blower 3. The end of the forming mechanism 13 away from the blower pipe 31 is connected to the hot melt box 11 by a guide pipe 32. After the moisture-proof and antibacterial PVC decorative board is extruded and formed, the blower 3 is started to supply room temperature air to the forming mechanism 13 in conjunction with the blower pipe 31 to cool the board. At the same time, the guide pipe 32 is used to return the excess heat to the hot melt box 11, forming a closed loop of "cooling and forming and heat recovery", thereby preheating the material in the hot melt box 11 and reducing the heating energy consumption of the hot melt box 11.

[0037] Further, see Figure 2 The air duct 32 is equipped with a filter cylinder 34, and the inner cavity of the filter cylinder 34 is equipped with a filter element for filtering hot air. The filter cylinder 34 is connected to the middle of the air duct 32 through a flange 35. The filter element in the filter cylinder 34 can intercept impurities such as PVC dust and nanomaterial fragments that may be carried during the cooling process, preventing them from flowing back to the hot melt box 11 with the hot air and contaminating the raw materials. This avoids screw wear or material performance deterioration caused by impurities entering the open circulation. Furthermore, the filter cylinder 34 connected by the flange 35 can be quickly disassembled and the filter element replaced, providing a stable environmental guarantee for long-term continuous production.

[0038] It is worth noting that, see Figure 2 A blower 33 is installed on the side of the air duct 32 near the molding mechanism 13. With the blower 33, on the one hand, the blower 33 increases the airflow velocity in the air duct 32, so that the residual heat discharged by the molding mechanism 13 can quickly flow back to the hot melt box 11, shortening the heat transfer time. On the other hand, it works in coordination with the blower 3 to form a stable pressure difference, ensuring that the air pressure on the surface of the plate is uniform during the molding process, and avoiding surface defects (such as air marks and dents) caused by airflow fluctuations.

[0039] It is worth noting that, see Figure 4 The drive disk 28 is fixedly connected to a connecting shaft 210 at the end away from the dispersing plate 29. A spiral blade 211 is fixedly connected to the outer side of the connecting shaft 210. The spiral blade 211 generates axial thrust as it rotates with the drive disk 28, which pushes the dispersed material from the bottom of the mixing box 21 to the hot melt box 11 at a uniform speed. This avoids flow fluctuations caused by gravity feeding, which could lead to material jamming. Combined with the radial shear force of the dispersing plate 29, this forms a composite motion of "circumferential dispersion and axial conveying", which shortens the residence time of the nanomaterials in the mixing box 21 and improves the uniformity of the material when it enters the hot melt box 11.

[0040] It is worth mentioning that, see Figure 3 A fixing bolt 24 passes through the top of the box cover 22, and the fixing bolt 24 is threadedly connected to the top of the mixing box 21. The fixing bolt 24 facilitates the disassembly of the box cover 22 and facilitates the periodic removal of residual materials (such as clumped PVC melt and nanoparticle agglomerates) in the mixing box 21.

[0041] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0042] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A moisture-proof and antibacterial PVC decorative panel extrusion molding device, characterized in that, include; The extrusion mechanism (1) has a hot melt box (11) installed at one end and a forming mechanism (13) connected to the other end through an extrusion tube (12). A dispersion mechanism (2), located at the top of the hot melt box (11), is used to achieve uniform mixing of the moisture-proof and antibacterial material with the PVC matrix. The dispersion mechanism (2) includes: A mixing box (21) connected to the top of the hot melt box (11) is provided with a box cover (22) at the top opening of the mixing box (21). The main material pipe (23) with the bottom as the feed end is penetrated through the middle of the box cover (22). Multiple auxiliary material pipes (26) are equidistantly penetrated through the outside of the main material pipe (23). The drive shaft (27) is rotatably connected at one end to the top of the inner cavity of the main material tube (23) via a sealed bearing, and the other end is fixedly connected to the drive disk (28). Multiple dispersion plates (29) are fixedly connected to the surface of the drive disk (28). The drive assembly located at the top of the main material pipe (23) is used to drive the drive disk (28) to rotate and disperse and mix the added material.

2. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 1, characterized in that, The drive assembly includes a drive motor (25) fixedly connected to the top of the main material tube (23), and the drive end of the drive motor (25) is connected to the drive shaft (27) via a coupling.

3. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 1, characterized in that, One end of the forming mechanism (13) is connected to a blower pipe (31), and the other end of the blower pipe (31) is connected to a blower (3). The end of the forming mechanism (13) away from the blower pipe (31) is connected to the hot melt box (11) by a guide pipe (32).

4. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 3, characterized in that, The air duct (32) is provided with a filter cylinder (34), the inner cavity of the filter cylinder (34) is provided with a filter element for filtering hot air, and the filter cylinder (34) is connected to the middle part of the air duct (32) through a flange (35).

5. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 3, characterized in that, A blower (33) is installed on the side of the air duct (32) near the forming mechanism (13).

6. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 1, characterized in that, The drive disk (28) is fixedly connected to a connecting shaft (210) at one end away from the dispersing plate (29), and a spiral blade (211) is fixedly connected to the outside of the connecting shaft (210).

7. The moisture-proof and antibacterial PVC decorative board extrusion molding device as described in claim 1, characterized in that, A fixing bolt (24) passes through the top of the box cover (22), and the fixing bolt (24) is threadedly connected to the top of the mixing box (21).

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