Preparation method and device of wood-like plastic foaming profile

Abstract

The invention belongs to the technical field of wood-like profile production, and particularly relates to a preparation method and device of a wood-like plastic foaming profile. A main material connecting port, an auxiliary material connecting port and a mold connecting port are respectively formed in the side surfaces of the co-extrusion molding box; the isolation assembly comprises a group of insertion sheets; the insertion pieces are bent and designed to be in an irregular wave shape. A plurality of main material layers and auxiliary material layers which are not associated with each other are formed between the adjacent insertion pieces; a group of main material grooves and auxiliary material grooves are respectively formed in the side surfaces of the co-extrusion molding box; the surface and the interior of the wood-like profile produced through the device have wood grains, reprocessing technologies such as profile cutting, polishing and carving are facilitated, the wood-like effect of the profile is improved, and due to the arrangement of the insertion pieces, the formed main material layer and the formed auxiliary material layer have certain shape characteristics, so that the wood grains of the profile are fixed, and the wood-like effect of the profile is improved. The process is controllable, profiles with the same texture are produced in batches, and the stability of product quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wood-like profile production, in particular to a method and device for preparing a wood-like plastic foam profile. Background Art

[0002] With the continuous development of society and the rise of environmental awareness, traditional wood and plastic materials have gradually exposed some problems that cannot be ignored. The dwindling timber resources and the environmental pollution caused by the production and use of plastic materials have prompted the research and development of new environmentally friendly materials. Among them, wood-like plastic materials, as a new environmentally friendly material, are gradually being widely used in various fields such as construction, furniture, transportation, and gardening because they combine the appearance of wood with the excellent performance of plastic.

[0003] Chinese patent application CN111037872B discloses a production apparatus for co-extruded, mixed-color wood-plastic composite materials with simulated wood grain. The key technical features include a first extrusion component, a component transition connector, a co-extrusion module, an embossing machine, a sizing table, and a cutting machine. The co-extrusion module is equipped with a second extrusion component and a wood grain control component, which has a cylindrical gap within it. This production apparatus effectively solves the existing problem of simultaneous addition of fabric and masterbatch, where the masterbatch melts excessively and is easily disturbed by fabric dissolution, resulting in unstable flow rates and an unsatisfactory or intermittent wood grain effect.

[0004] When preparing wood-like plastic foam profiles in the above-mentioned and existing technologies, the profiles are usually divided into a core material and a fabric that wraps the core material, and the core material is wrapped and extruded through two sets of screw extrusion devices. The wood grain effect formed by this method is reflected in the fabric. The core material does not have a wood texture due to its single material, resulting in the produced profile still having a certain plastic feel; another method is to add masterbatches or color powders of different colors to the plastic base material, and use incomplete mixing or melt fracture effects to allow materials of different colors to maintain a certain striped or cloud-like distribution in the molten state. This uneven melt will form a background color and stripe prototype similar to wood grain during extrusion, but the wood grain shape formed by this method is relatively random, and there are a lot of unstable factors. Its texture state is difficult to control, and it is impossible to replicate the same wood grain profile according to production requirements.

[0005] To this end, the present invention provides a method and device for preparing a wood-like plastic foam profile. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the device for preparing a wood-like plastic foam profile of the present invention comprises a co-extrusion box and an isolation component; The side of the co-extrusion box is respectively provided with a main material connection port, an auxiliary material connection port and a mold connection port; the main material connection port and the auxiliary material connection port are arranged opposite to each other; The isolation assembly is used to separate the interior of the co-extrusion box into multiple main material layers and auxiliary material layers; the isolation assembly includes a set of inserts; the inserts are all bent into an irregular wave shape; multiple independent main material layers and auxiliary material layers are formed between adjacent inserts; the main material layers and auxiliary material layers are arranged in a staggered manner, and the thickness of the main material layer is greater than that of the auxiliary material layer; A group of main material troughs and auxiliary material troughs are respectively opened on the side of the co-extrusion box; the main material connection port and the main material layer are communicated with each other through the main material troughs; the auxiliary material connection port and the auxiliary material layer are communicated with each other through the auxiliary material troughs.

[0008] Preferably, the bending degrees and shapes of the inserts are different.

[0009] Preferably, the inner wall surface of the co-extrusion box is evenly distributed with multiple pairs of clips; both ends of the insert are designed to be straight and inserted between a pair of clips; the side of the co-extrusion box away from the mold connection port is fixedly connected to a support plate and a guard plate; a group of wave grooves are opened on the surface of the support plate; the insert matches the corresponding wave groove shape and is inserted into the inside of the wave groove.

[0010] Preferably, interception filter plates are fixedly connected inside the main material connection port and the auxiliary material connection port.

[0011] Preferably, the main material connection port and the auxiliary material connection port are both equipped with a salvage assembly; the salvage assembly is used to salvage residual materials on the surface of the interception filter plate online; the salvage assembly includes a salvage plate; the salvage plate is in sliding and sealing cooperation with the top of the main material connection port and the auxiliary material connection port; a collection trough and a storage cavity are provided at the bottom of the salvage plate; a stripping plate is provided at the bottom of the collection trough.

[0012] Preferably, the stripping plate and the collection tank are hinged by a turn pin and a torsion spring; an operating bolt is threadedly connected to the top of the salvage plate; a tensioning rope is fixedly connected between the lower end of the operating bolt and the stripping plate, and the tensioning rope passes through the salvage plate, the storage cavity and the inside of the collection tank.

[0013] Preferably, a slide groove is provided on the top of the main material connection port and the auxiliary material connection port, and the salvage plate passes through the middle of the slide groove; a pair of guide blocks are slidably connected inside the slide groove; a spring is fixedly connected between the guide blocks and the slide groove; and a slope is designed on the side where the guide blocks are close to each other.

[0014] Preferably, a magnetic strip is fixedly connected to the top of the collecting tank; a receiving slot is provided at the end of the stripping plate; an insert is slidably connected inside the receiving slot; a second spring is fixedly connected between the insert and the receiving slot; the magnetic strip and the insert attract each other when they are close to each other.

[0015] A method for preparing a wood-like plastic foam profile, using the above-mentioned wood-like plastic foam profile preparation device, comprises the following steps: A1. Connect the main material connection port to the screw extruder for conveying the main material, the auxiliary material connection port to the screw extruder for conveying the auxiliary material, and the mold connection port to the die; A2, a screw extruder feeds the main plastic used to form the imitation wood base material into each main material layer of the co-extrusion box through the main material connection port and the main material trough. Another set of screw extruders feeds the auxiliary plastic used to form the imitation wood texture into each auxiliary material layer of the co-extrusion box through the auxiliary material connection port and the auxiliary material trough. A3. Under pressure, the main plastic and auxiliary plastic fill multiple main material layers and auxiliary material layers respectively, and then squeeze them into the mold through the mold connection port to form the mold; A4. Use interception filter plates to separate and intercept solid matter in plastics, and use salvage components to regularly remove residues on the surface of the interception filter plates.

[0016] The specific steps for salvaging the components in step A4 are as follows: B1. Rotate the operating pin to move it upward relative to the salvage plate, and then the operating pin pulls the tension rope upward and drives the stripping plate to deflect, causing the stripping plate to move away from the intercepting filter plate; B2. Push the salvage plate downward. When the stripping plate moves to the bottom of the intercepting filter plate, rotate the operating bolt in the opposite direction to make it move downward relative to the salvage plate. The tension rope is loosened, and the stripping plate is deflected toward the intercepting filter plate under the action of the torsion spring and adheres to its surface. B3. Pull the salvage plate upwards to cause the stripping plate to rub and scrape the surface of the intercepting filter plate to collect the solid debris into the storage cavity; B4. When the stripping plate moves to the top of the intercepting filter plate, the stripping plate is deflected back into the collecting tank by operating the bolt, and the salvage plate is continued to be pulled and separated from the main material connection port or the auxiliary material connection port; B5. The stripping plate is controlled to deflect outward again by operating the bolt to expose the collecting groove, and then the solid impurities collected in the storage cavity are taken out.

[0017] The beneficial effects of the present invention are as follows: 1. The method and device for preparing a wood-like plastic foam profile described in the present invention have wood texture on both the surface and the interior of the wood-like profile produced by this process, which is conducive to reprocessing processes such as profile cutting, polishing, and carving. Even if the material is cut or damaged during use, its interior can still show realistic wood characteristics, thereby improving the wood-like effect of the profile. In addition, due to the setting of the insert, the main material layer and the auxiliary material layer formed have certain shape characteristics. Therefore, the wood grain of the profile produced by the extrusion process is relatively fixed, realizing process controllability and batch production of profiles with the same texture, thereby improving the stability of product quality.

[0018] 2. The method and device for preparing a wood-like plastic foam profile described in the present invention provide multiple pairs of clips to install and support the inserts. When the inserts are damaged or other wood grain shapes need to be produced, the inserts can be easily disassembled and replaced, making the production of wood-like profiles more flexible. By providing support plates, on the one hand, the inserts can be further supported and maintained, and on the other hand, the ends of multiple inserts can be sealed to isolate the main material layer from the auxiliary material layer.

[0019] 3. The preparation method and device of the wood-like plastic foam profile described in the present invention, when it is necessary to regularly clean the residual material on the surface of the interception filter plate, push the salvage plate downward and make it enter the main material connection port or the auxiliary material connection port, and then pull the salvage plate upward, and the end of the stripping plate is attached to the surface of the interception filter plate to scrape off the attached residue, and then the residue flows along the surface of the stripping plate through the collection groove into the storage cavity to clean and collect solid impurities, thereby improving the permeability of the interception filter plate. In addition, this operation is online impurity removal, and the equipment does not need to be shut down during the entire process, ensuring that production work can continue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a perspective view of the present invention; Figure 2 It is a disassembly schematic diagram of the present invention; Figure 3 It is a structural diagram of the insert and the support plate in the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 yes Figure 4 A partial enlarged view of the middle A; Figure 6 It is a structural schematic diagram of the salvage assembly in the present invention; Figure 7 yes Figure 6 A partial enlarged view of point B in the middle; Figure 8 and Figure 9 It is a schematic flow chart of the method of the present invention.

[0022] In the figure: co-extrusion box 1, main material connection port 2, auxiliary material connection port 3, mold connection port 4, main material layer 5, auxiliary material layer 6, insert 7, main material trough 8, auxiliary material trough 9, clip 10, support plate 11, guard plate 12, wave trough 13, intercepting filter plate 14, salvage assembly 15, salvage plate 16, collecting trough 17, storage chamber 18, stripping plate 19, operating bolt 20, tensioning rope 21, slide 22, guide block 23, spring 1 24, magnetic strip 25, storage slot 26, insert 27, spring 2 28. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figures 1 to 7 As shown, the device for preparing a wood-like plastic foam profile according to the present invention comprises a co-extrusion box 1 and an isolation component; The side of the co-extrusion box 1 is respectively provided with a main material connection port 2, an auxiliary material connection port 3 and a mold connection port 4; the main material connection port 2 and the auxiliary material connection port 3 are arranged opposite to each other; the main material connection port 2 is used to connect to the screw extruder for conveying the main material, the auxiliary material connection port 3 is used to connect to the screw extruder for conveying the auxiliary material, and the mold connection port 4 is used to connect to the die; The isolation assembly is used to separate the interior of the co-extrusion box 1 into multiple main material layers 5 and auxiliary material layers 6. The isolation assembly includes a set of inserts 7. The inserts 7 are all bent into an irregular wave shape. Multiple independent main material layers 5 and auxiliary material layers 6 are formed between adjacent inserts 7. The main material layers 5 and auxiliary material layers 6 are arranged in an alternating manner, and the thickness of the main material layers 5 is greater than that of the auxiliary material layers 6. A group of main material troughs 8 and auxiliary material troughs 9 are respectively opened on the side of the co-extrusion box 1; the main material connection port 2 and the main material layer 5 are connected to each other through the main material troughs 8; the auxiliary material connection port 3 and the auxiliary material layer 6 are connected to each other through the auxiliary material troughs 9.

[0025] In the prior art, when preparing wood-like plastic foam profiles, the profile is usually divided into a core material and a fabric wrapping the core material, and the core material is wrapped and extruded through two sets of screw extrusion devices. The wood grain effect formed by this method is reflected in the fabric, and the core material does not have a wood texture due to its single material, resulting in the produced profile still having a certain plastic feel; another method is to add masterbatches or color powders of different colors to the plastic base material, and use incomplete mixing or melt fracture effects to allow the materials of different colors to maintain a certain striped or cloud-like distribution in the molten state. This uneven melt will form a wood-grain-like base color and stripe prototype during extrusion. However, the wood grain shape formed by this method is relatively random, and there are many unstable factors. Its texture state is difficult to control, and it is impossible to replicate the same wood grain profile according to production requirements.

[0026] The present invention arranges a co-extrusion mold box 1 between an extruder and a mold. The main plastic used to form the wood-like base material enters the main material connection port 2 through a screw extruder and enters the interior of each main material layer 5 of the co-extrusion mold box 1 along multiple main material troughs 8. The auxiliary plastic used to form the wood-like texture enters the auxiliary material connection port 3 through another set of screw extruders and enters the interior of each auxiliary material layer 6 of the co-extrusion mold box 1 along multiple auxiliary material troughs 9. Then, under the action of pressure, the main plastic and the auxiliary plastic respectively fill the multiple main material layers 5 and the auxiliary material layers 6 densely, and then are squeezed into the mold through the mold connection port 4 to form.

[0027] The surface and interior of the wood-like profile produced by this process have wood texture, which is conducive to the reprocessing processes such as profile cutting, polishing, and carving. Even if the material is cut or damaged during use, its interior can still show realistic wood characteristics, improving the wood-like effect of the profile. In addition, due to the setting of the insert 7, the main material layer 5 and the auxiliary material layer 6 formed have certain shape characteristics. Therefore, the wood grain of the profile produced by the extrusion process is relatively fixed, realizing process controllability and batch production of profiles with the same texture, thereby improving the stability of product quality.

[0028] It is worth noting that the main plastic is used as the base material of the imitation wood material to imitate the base color of wood, such as light yellow, brown, beige, etc. The auxiliary plastic is used as the auxiliary material of the imitation wood material to imitate the texture color of wood, such as dark brown, black and other stripes.

[0029] The curvature and shape of the inserts 7 vary. Because naturally grown wood grain is often random and varied, the shape of the inserts 7 is crucial. Different shapes of inserts 7 create distinct stripes in the profile, fully simulating the authenticity and naturalness of wood and further enhancing the wood feel of the plastic foam profile.

[0030] As another embodiment of the present invention, the inner wall surface of the co-extrusion box 1 is evenly distributed with multiple pairs of clips 10; both ends of the insert 7 are designed to be straight and inserted between a pair of clips 10; the side of the co-extrusion box 1 away from the mold connection port 4 is fixedly connected to a support plate 11 and a guard plate 12; a group of wave grooves 13 are opened on the surface of the support plate 11; the insert 7 matches the shape of the corresponding wave groove 13 and is inserted into the inside of the wave groove 13.

[0031] By providing multiple pairs of clips 10 to install and support the inserts 7, when the inserts 7 are damaged or other wood grain shapes need to be produced, the inserts 7 can be easily disassembled and replaced, making the production of imitation wood profiles more flexible. By providing support plates 11, on the one hand, the inserts 7 can be further supported and maintained, and on the other hand, the ends of multiple inserts 7 can be sealed to isolate the main material layer 5 from the auxiliary material layer 6.

[0032] As another embodiment of the present invention, interception filter plates 14 are fixedly connected to the interior of the main material connection port 2 and the auxiliary material connection port 3. Since a small amount of impurities that cannot be smoothly melted may be present in the plastic during the process of heating and conveying the plastic melt by the screw extruder due to raw material contamination, environmental pollution, or equipment wear and tear, the interception filter plates 14 are provided to separate and intercept the solid matter in the plastic, preventing it from entering the co-extrusion box 1 and the interior of the mold and causing the risk of blockage, and preventing the product from having surface defects, wood grain fractures, and even mechanical property degradation.

[0033] As another embodiment of the present invention, the main material connection port 2 and the auxiliary material connection port 3 are both equipped with a salvage assembly 15; the salvage assembly 15 is used to online salvage residual materials on the surface of the interception filter plate 14; the salvage assembly 15 includes a salvage plate 16; the salvage plate 16 is slidingly and sealingly matched with the top of the main material connection port 2 and the auxiliary material connection port 3; a collection tank 17 and a storage cavity 18 are provided at the bottom of the salvage plate 16; a stripping plate 19 is provided at the bottom of the collection tank 17.

[0034] When it is necessary to regularly clean the residual material on the surface of the intercepting filter plate 14, the salvage plate 16 is pushed downward and entered into the main material connection port 2 or the auxiliary material connection port 3, and then the salvage plate 16 is pulled upward. The end of the stripping plate 19 is attached to the surface of the intercepting filter plate 14 and scrapes off the attached residue. Then the residue flows along the surface of the stripping plate 19 through the collection groove 17 into the storage chamber 18 to clean and collect solid impurities, thereby improving the permeability of the intercepting filter plate 14. This operation is online impurity removal, and the equipment does not need to be shut down during the entire process, ensuring that production work can continue.

[0035] The stripping plate 19 is hinged to the collecting tank 17 by a rotating pin and a torsion spring; an operating bolt 20 is threadedly connected to the top of the salvage plate 16; a tensioning rope 21 is fixedly connected between the lower end of the operating bolt 20 and the stripping plate 19, and the tensioning rope 21 passes through the salvage plate 16, the storage cavity 18 and the inside of the collecting tank 17; in order to prevent the tensioning rope 21 from wearing, a guide wheel or guide roller should be provided at the turning point of the tensioning rope 21.

[0036] In the process of pushing the salvage plate 16 downward, the operating pin 20 is rotated to make it move upward relative to the salvage plate 16 under the action of the thread, and then the operating pin 20 pulls the tensioning rope 21 upward and drives the stripping plate 19 to deflect, so that it is away from the interception filter plate 14 and does not contact each other, to prevent the stripping plate 19 from pushing the residue on the surface of the interception filter plate 14 to the bottom when the salvage plate 16 descends, so that it cannot be salvaged later. When the stripping plate 19 moves to the bottom of the interception filter plate 14, the operating pin 20 is rotated in the opposite direction to make it move downward relative to the salvage plate 16, and then the tensioning rope 21 is loosened, and the stripping plate 19 moves toward the interception filter plate 14 under the action of the torsion spring. The stripping plate 19 is deflected and adheres to its surface, and then the salvage plate 16 is pulled upward, prompting the stripping plate 19 to rub and scrape the surface of the intercepting filter plate 14 to collect solid debris. When the stripping plate 19 moves to the top of the intercepting filter plate 14, the stripping plate 19 is controlled by the operating bolt 20 to be deflected again and retracted into the collection tank 17 so that it does not protrude from the surface of the salvage plate 16. The salvage plate 16 is then continued to be pulled and separated from the main material connection port 2 or the auxiliary material connection port 3. Then, the stripping plate 19 is controlled by the operating bolt 20 to deflect outward again and expose the collection tank 17, so that the solid debris collected in the storage cavity 18 can be taken out through the collection tank 17.

[0037] As another embodiment of the present invention, a slide groove 22 is provided on the top of the main material connection port 2 and the auxiliary material connection port 3, and the salvage plate 16 passes through the middle of the slide groove 22; a pair of guide blocks 23 are slidably connected inside the slide groove 22; a spring 24 is fixedly connected between the guide blocks 23 and the slide groove 22; and a slope is designed on the side where the guide blocks 23 are close to each other.

[0038] When the salvage plate 16 is pulled out of the main material connection port 2 or the auxiliary material connection port 3, the pair of guide blocks 23 approach each other and close together under the action of spring 1 24, thereby sealing the top of the main material connection port 2 or the auxiliary material connection port 3 to prevent the plastic therein from gushing upward, ensuring the sealing thereat, so as to smoothly achieve impurity removal under the premise of uninterrupted operation of the equipment. When the salvage plate 16 is reinserted into the main material connection port 2 or the auxiliary material connection port 3, the bottom of the salvage plate 16 squeezes the inclined surface of the guide block 23, causing the pair of guide blocks 23 to separate from each other and re-enter the chute 22, so that the salvage plate 16 can smoothly enter the main material connection port 2 or the auxiliary material connection port 3 to salvage the residue on the surface of the interception filter plate 14.

[0039] As another embodiment of the present invention, a magnetic strip 25 is fixedly connected to the top of the collection tank 17; a receiving slot 26 is defined at the end of the stripping plate 19; an insert 27 is slidably connected within the receiving slot 26; a spring 28 is fixedly connected between the insert 27 and the receiving slot 26; and when the magnetic strip 25 and insert 27 are close together, they attract each other. When the stripping plate 19 rotates and retracts into the collection tank 17, the insert 27 is attracted by the magnetic strip 25 and moves upward, abutting against the inner wall of the top of the collection tank 17, further sealing the gap in the collection tank 17 and preventing solid impurities within the storage chamber 18 from leaking out.

[0040] like Figures 8 and 9 As shown, the method for preparing a wood-like plastic foam profile according to the present invention adopts the above-mentioned wood-like plastic foam profile preparation device and comprises the following steps: A1. Connect the main material connection port 2 to the screw extruder for conveying the main material, the auxiliary material connection port 3 to the screw extruder for conveying the auxiliary material, and the mold connection port 4 to the die; A2, a screw extruder feeds the main plastic used to form the imitation wood base material into each main material layer 5 of the co-extrusion box 1 through the main material connection port 2 and the main material trough 8. Another set of screw extruders feeds the auxiliary plastic used to form the imitation wood texture into each auxiliary material layer 6 of the co-extrusion box 1 through the auxiliary material connection port 3 and the auxiliary material trough 9. A3. Under pressure, the main plastic and the auxiliary plastic respectively fill multiple main material layers 5 and auxiliary material layers 6 tightly, and then squeeze them into the mold through the mold connection port 4 to form the mold; A4. The solid matter in the plastic is separated and intercepted by the interception filter plate 14 , and the residue on the surface of the interception filter plate 14 is regularly removed by the salvage component 15 .

[0041] The specific operation steps of the salvaging component 15 in step A4 are as follows: B1. Rotate the operating pin 20 to move it upward relative to the salvage plate 16, so that the operating pin 20 pulls the tension rope 21 upward and drives the stripping plate 19 to deflect, causing the stripping plate 19 to move away from the intercepting filter plate 14; B2. Push the salvage plate 16 downward. When the stripping plate 19 moves to the bottom of the intercepting filter plate 14, rotate the operating bolt 20 in the opposite direction to move it downward relative to the salvage plate 16. The tension rope 21 is loosened, and the stripping plate 19 is deflected toward the intercepting filter plate 14 by the torsion spring and adheres to its surface. B3. Pull up the salvage plate 16 to cause the stripping plate 19 to rub and scrape the surface of the intercepting filter plate 14 to collect the solid debris into the storage cavity 18; B4. When the stripping plate 19 moves to the top of the intercepting filter plate 14, the stripping plate 19 is deflected back into the collecting tank 17 by operating the bolt 20, and the salvage plate 16 is continuously pulled up and separated from the main material connection port 2 or the auxiliary material connection port 3; B5. The stripping plate 19 is again controlled to deflect outwards by operating the bolt 20 to expose the collecting groove 17 , and then the solid impurities collected in the storage chamber 18 are taken out.

[0042] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing wood-like plastic foam profiles, characterized by: It includes a co-extrusion box (1) and an isolation component; The side of the co-extrusion box (1) is respectively provided with a main material connection port (2), an auxiliary material connection port (3) and a mold connection port (4); the main material connection port (2) and the auxiliary material connection port (3) are arranged opposite to each other; The isolation component is used to separate the interior of the co-extrusion box (1) into a plurality of main material layers (5) and auxiliary material layers (6); the isolation component comprises a group of inserts (7); the inserts (7) are all bent and designed to be irregularly wavy; a plurality of mutually independent main material layers (5) and auxiliary material layers (6) are formed between adjacent inserts (7); the main material layers (5) and the auxiliary material layers (6) are arranged in a staggered manner, and the thickness of the main material layers (5) is greater than that of the auxiliary material layers (6); A group of main material troughs (8) and auxiliary material troughs (9) are respectively provided on the side of the co-extrusion box (1); the main material connection port (2) and the main material layer (5) are communicated with each other through the main material troughs (8); and the auxiliary material connection port (3) and the auxiliary material layer (6) are communicated with each other through the auxiliary material troughs (9).

2. The device for preparing a wood-like plastic foam profile according to claim 1, characterized in that: The bending degree and shape of the insert (7) are different.

3. The device for preparing a wood-like plastic foam profile according to claim 2, characterized in that: The inner wall surface of the co-extrusion box (1) is uniformly distributed with a plurality of pairs of clips (10); both ends of the insert (7) are designed to be straight and inserted between a pair of clips (10); a support plate (11) and a guard plate (12) are fixedly connected to the side of the co-extrusion box (1) away from the mold connection port (4); a group of wave grooves (13) are opened on the surface of the support plate (11); the insert (7) matches the shape of the corresponding wave groove (13) and is inserted into the inside of the wave groove (13).

4. The device for preparing a wood-like plastic foam profile according to claim 3, characterized in that: The main material connection port (2) and the auxiliary material connection port (3) are both fixedly connected to an interception filter plate (14).

5. The device for preparing a wood-like plastic foam profile according to claim 4, characterized in that: The main material connection port (2) and the auxiliary material connection port (3) are both equipped with a salvage assembly (15); the salvage assembly (15) is used to salvage residual materials on the surface of the interception filter plate (14) online; the salvage assembly (15) includes a salvage plate (16); the salvage plate (16) is in sliding and sealing cooperation with the top of the main material connection port (2) and the auxiliary material connection port (3); the bottom of the salvage plate (16) is provided with a collection groove (17) and a storage cavity (18); the bottom of the collection groove (17) is provided with a stripping plate (19).

6. The device for preparing a wood-like plastic foam profile according to claim 5, characterized in that: The stripping plate (19) is hinged to the collecting tank (17) via a rotating pin and a torsion spring; an operating bolt (20) is threadedly connected to the top of the salvage plate (16); a tensioning rope (21) is fixedly connected between the lower end of the operating bolt (20) and the stripping plate (19), and the tensioning rope (21) passes through the salvage plate (16), the storage cavity (18) and the inside of the collecting tank (17).

7. The device for preparing a wood-like plastic foam profile according to claim 6, characterized in that: The tops of the main material connection port (2) and the auxiliary material connection port (3) are both provided with a slide groove (22), and the salvage plate (16) passes through the middle of the slide groove (22); a pair of guide blocks (23) are slidably connected inside the slide groove (22); a spring 1 (24) is fixedly connected between the guide blocks (23) and the slide groove (22); and a slope is designed on the side of the guide blocks (23) that are close to each other.

8. The device for preparing a wood-like plastic foam profile according to claim 7, characterized in that: A magnetic strip (25) is fixedly connected to the top of the collecting groove (17); a receiving groove (26) is provided at the end of the stripping plate (19); an insert (27) is slidably connected inside the receiving groove (26); a second spring (28) is fixedly connected between the insert (27) and the receiving groove (26); and the magnetic strip (25) and the insert (27) attract each other when they are close to each other.

9. A method for preparing a wood-like plastic foam profile, the method using the wood-like plastic foam profile preparation device according to claim 8, characterized in that: The following steps are involved: A1. Connect the main material connection port (2) to the screw extruder for conveying the main material, connect the auxiliary material connection port (3) to the screw extruder for conveying the auxiliary material, and connect the die connection port (4) to the die; A2, a screw extruder, delivers the main plastic used to form the imitation wood base material through the main material connection port (2) and the main material trough (8) into the interior of each main material layer (5) of the co-extrusion box (1), and another set of screw extruders delivers the auxiliary plastic used to form the imitation wood texture through the auxiliary material connection port (3) and the auxiliary material trough (9) into the interior of each auxiliary material layer (6) of the co-extrusion box (1); A3. Under pressure, the main plastic and the auxiliary plastic respectively fill the plurality of main material layers (5) and auxiliary material layers (6) densely, and then squeeze them into the mold through the mold connection port (4) to form; A4. The solid matter in the plastic is separated and intercepted by the interception filter plate (14), and the residue on the surface of the interception filter plate (14) is regularly removed by the salvage component (15).

10. The method for preparing a wood-like plastic foam profile according to claim 9, characterized in that: The specific steps for salvaging the component (15) in step A4 are as follows: B1. Rotating the operating bolt (20) to move it upward relative to the salvage plate (16), so that the operating bolt (20) pulls the tension rope (21) upward and drives the stripping plate (19) to deflect, thereby causing the stripping plate (19) to move away from the interception filter plate (14); B2. Push the salvage plate (16) downward. When the stripping plate (19) moves to the bottom of the intercepting filter plate (14), rotate the operating bolt (20) in the opposite direction to move it downward relative to the salvage plate (16). The tension rope (21) is loosened, and the stripping plate (19) is deflected toward the intercepting filter plate (14) under the action of the torsion spring and adheres to its surface. B3, pulling the salvage plate (16) upward, causing the stripping plate (19) to rub and scrape the surface of the intercepting filter plate (14) to collect the solid debris inside the storage chamber (18); B4, when the stripping plate (19) moves to the top of the intercepting filter plate (14), the stripping plate (19) is controlled by the operating bolt (20) to be deflected and retracted into the collecting tank (17), and the salvage plate (16) is continuously pulled up and separated from the main material connection port (2) or the auxiliary material connection port (3); B5. The stripping plate (19) is again controlled to deflect outwards by operating the bolt (20) to expose the collecting groove (17), and then the solid impurities collected in the storage chamber (18) are taken out.

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