A wood-plastic door panel micro-foaming molding device and its use method

Abstract

This invention relates to wood-plastic composite (WPC) production technology, and more particularly to a micro-foaming molding equipment and method for WPC door panels. The WPC door panel micro-foaming molding equipment includes an extruder and an extrusion die. The extrusion die includes a flow-collecting module, within which a mandrel is disposed. Vertical baffles are arranged between the mandrels, and the upper and lower end faces of the baffles are fixedly connected to the flow-collecting module. This invention features a novel structure. The baffles divide the WPC material into several material units, ensuring that each material unit does not interfere with others and that cross-flow does not occur between material units. This guarantees balanced material flow and consistent material pressure in each material unit, and maintains stable friction between the material units and the mandrels.

Description

Technical Field

[0001] The invention relates to a wood-plastic production technology, and in particular to a wood-plastic door panel micro-foaming molding device and a use method thereof. Background Art

[0002] Wood-plastic composite materials have a series of special properties that are superior to wood and plastics. They have a wood appearance and secondary processing properties similar to wood. Wood-plastic materials have better dimensional stability than wood, less water absorption, are not afraid of insects, and will not produce cracks and warping deformations like wood. They have the processability of thermoplastics, and at the same time, their hardness is higher than that of plastics, and they are wear-resistant, aging-resistant, and corrosion-resistant. In addition to the above advantages, the micro-foamed wood-plastic composite materials formed by introducing very small bubbles into the wood-plastic composite materials through gas nuclei have a good pore structure inside the printed material, which can passivate the crack tip and prevent the crack from expanding; thus, the shortcomings of general wood-plastic composite materials, such as high brittleness, low ductility and low impact stress resistance, can be effectively overcome. However, in the process of producing micro-foamed wood-plastic door panels using existing technologies, due to defects in mold design, stripes of different chromaticity appear on the outer surface of the door panels, especially stripes are easily formed at the joints between the reinforcing ribs and the panels. This color difference defect has a great impact on the appearance of the door panels in the later stage.

[0003] There are many factors that cause color difference, such as uneven foaming of wood-plastic materials, different foam sizes, uneven pressure in the mold, and cross-flow during the flow of wood-plastic materials, especially the cross-flow between the wall flow channel (the flow channel between the core rod and the mold shell) and the reinforcing rib flow channel (the flow channel between the core rods), which directly affects the appearance of the panel, etc. Summary of the invention

[0004] In view of the above problems, the present invention provides a wood-plastic door panel micro-foaming molding device and a use method thereof, which has a simple and ingenious structure and is easy to operate, and can effectively solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A wood-plastic door panel micro-foaming molding device comprises an extruder and an extrusion die, wherein the extrusion die comprises a confluence module, a core rod is arranged inside the confluence module, baffles are vertically arranged between the core rods, and the upper and lower end surfaces of the baffles are fixedly connected to the confluence module.

[0007] Specifically, the confluence module includes a confluence plate and an advection plate, the opening of the confluence plate toward the extruder is funnel-shaped, and the baffle is located in the space inside the confluence plate and the advection plate.

[0008] Specifically, the baffle is located on the symmetry plane of two adjacent core rods.

[0009] Specifically, the discharge end of the confluence module is also fixedly connected to a discharge plate, and the end of the core rod is located inside the discharge plate.

[0010] Specifically, the feed end of the confluence module is fixedly connected to the core rod support plate, and the core rod is fixedly arranged on the core rod support plate and extends into the confluence module.

[0011] Preferably, the mandrel support plate is hollow in the middle, a plurality of mandrels are evenly distributed, and the upper and lower surfaces of the mandrels are fixedly connected to the upper inner wall and lower inner wall of the mandrel support plate through the mandrel support, the mandrels and the mandrels and the side walls of the mandrel support plate are fixedly connected through cross plates, and the mandrel support is located on the same side of the axis of the mandrel.

[0012] Preferably, the feed end of the core rod support plate is fixedly connected to a diverter cone support plate, the diverter cone support plate is hollow in the middle and a plurality of diverter cones are fixedly connected therein, and the diverter cones and the diverter cone support plate divide the hollow space of the diverter cone support plate into a plurality of flow channels.

[0013] Preferably, the diverter cones are connected by a connecting plate, and the diverter cones at both ends are fixedly connected to the inner side wall of the diverter cone bracket plate by the connecting plate. The diverter cone shrinks toward the extruder and its longitudinal section is triangular as a whole.

[0014] Preferably, the feed end of the splitter cone bracket plate is fixedly connected to the second module, the feed end of the second module is fixedly connected to the first module, the first module and the second module are fixedly provided with a splitter body, and the first module is provided with a feed port.

[0015] The present invention also provides a method for using a micro-foaming molding device for a wood-plastic door panel. After being extruded by an extruder, the wood-plastic material enters a confluence module of an extrusion die. The wood-plastic material is divided into a plurality of square material units surrounding a core rod by a baffle. The setting of the baffle forms the wood-plastic material into a plurality of equal material units. The wood-plastic material is only combined at the outlet of a discharge plate.

[0016] Specifically, the connecting plate and the transverse plate are in close contact and on the same horizontal plane. The wood-plastic material enters the diverter cone bracket body and is divided into several parts and moves forward through the flow channel. The wood-plastic material is divided into upper and lower layers of material flows flowing separately by the connecting plate and the transverse plate. At the end of the connecting plate, the upper and lower layers of relative material flows merge and are divided into material units by the baffle.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the setting of the baffle can realize the division of the wood-plastic material into several material units, so that each material unit does not affect each other, and there will be no cross-flow between each material unit, ensuring the balance of material flow and the consistency of material pressure of each material unit, and ensuring that the friction between the material unit and the core rod remains stable. Since the cross section of the reinforcing rib flow channel is reduced, the flow amount of the material between the wall flow channel and the reinforcing rib flow channel is reduced, and the influence of cross-flow is reduced.

[0018] In addition, the connection plate and the cross plate are used to realize the upper and lower layered flow channels. After the material flows in the upper and lower layered flow channels merge and mix, the baffles are used to divide the material units, so that the wood-plastic materials are mixed more evenly and the temperature of the wood-plastic materials is more uniform. The existence of the baffle can reduce the cross-section of the flow space of the wood-plastic materials, and the resistance generated in the extrusion mold is greater, the compression force on the materials is greater, the materials are denser, and the force is more uniform. The baffle is connected to the confluence module, and the baffle also has the function of temperature conduction, which can also improve the uniformity of the temperature of the wood-plastic materials, further improve the uniformity of the foaming of the materials, and eliminate the color difference of the products. It is simple, ingenious, reasonable and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the first module and the second module;

[0020] Figure 2 for Figure 1 Middle AA section view;

[0021] Figure 3 It is a front view of the split cone support plate;

[0022] Figure 4 for Figure 3 Middle CC section view;

[0023] Figure 5 for Figure 3 Middle BB section view;

[0024] Figure 6 is a front view of the mandrel support plate;

[0025] Figure 7 for Figure 6 Middle EE section view;

[0026] Figure 8 for Figure 6 Middle DD section view;

[0027] Fig. 9 It is the front view of the confluence module;

[0028] Fig.10 It is a structural schematic diagram of the confluence module;

[0029] Fig.11 is a side cross-sectional view of a confluence module;

[0030] Fig.12 It is the front view of the discharge plate;

[0031] Fig.13 It is a structural schematic diagram of the discharge plate;

[0032] Fig.14 is a side sectional view of the discharge plate;

[0033] Fig.15 for Figure 7 Enlarged view of part F;

[0034] Fig.16 It is a structural schematic diagram of the present invention;

[0035] Fig.17 The schematic diagram is a structural diagram of the present invention after removing the material dividing body.

[0036] In the figure: 1-second module, 2-first module, 3-feeding port, 4-distributing body, 5-cavity flow channel, 6-distributing cone support plate, 7-flow channel, 8-distributing cone, 9-core rod support plate, 10-core rod support, 11-blocking piece, 12-core rod, 13-gap, 14-cross plate, 15-convergence module, 16-convergence plate, 17-flat flow plate, 18-discharging plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0038] A wood-plastic door panel micro-foaming molding device comprises an extruder and an extrusion die.

[0039] The extrusion module includes a first module 2 , a second module 1 , a splitter cone support plate 6 , a core rod support plate 9 , a core rod 12 , a confluence module 15 , and a discharge plate 18 .

[0040] The first module (2) is provided with a feed inlet (3), the feed end of the second module 1 is fixedly connected to the first module 2, and a material dividing body 4 is fixedly provided inside the first module 2 and the second module 1.

[0041] The feed end of the split cone support plate 6 is fixedly connected with the second module 1. The split cone support plate 6 is hollow in the middle and a plurality of split cones 8 are fixedly connected therein. The split cones 8 and the split cone support plate 6 divide the hollow space of the split cone support plate 6 into a plurality of flow channels 7. The split cones 8 are connected by connecting plates, and the split cones 8 at both ends are fixedly connected to the inner side wall of the split cone support plate 6 by connecting plates. The split cone 8 shrinks toward the extruder and its longitudinal section is triangular as a whole.

[0042] The mandrel support plate 9 is fixedly connected to the feed end with the diverter cone support plate 6, the mandrel support plate 9 is hollow in the middle, a plurality of mandrels 12 are evenly arranged, and the upper and lower surfaces of the mandrels 12 are fixedly connected to the upper inner wall and the lower inner wall of the mandrel support plate 9 through the mandrel support 10, the mandrels 12 and the mandrels 12 and the side wall of the mandrel support plate 9 are fixedly connected through the transverse plate 14, and the mandrel support 10 is located on the same side of the axis of the mandrel 12. The connecting plate is in close contact with the transverse plate 14 and is on the same horizontal plane.

[0043] The inlet end of the confluence module 15 is fixedly connected to the core rod support plate 9, and the core rod 12 is fixedly arranged on the core rod support plate 9 and extends into the confluence module 15. The outlet end of the confluence module 15 is also fixedly connected to the outlet plate 18, and the end of the core rod 12 is located in the outlet plate 18.

[0044] The confluence module 15 is provided with a core rod 12, and a baffle 11 is vertically provided between the core rods 12, and the upper and lower end surfaces of the baffle 11 are fixedly connected to the confluence module 15. The confluence module 15 includes a confluence plate 16 and a flat plate 17, and the opening of the confluence plate 16 toward the extruder is funnel-shaped, and the baffle 11 is located in the space inside the confluence plate 16 and the flat plate 17. The baffle 11 is located on the symmetric plane of two adjacent core rods 12. The baffle 11 is made of a material with good thermal conductivity.

[0045] A method for using a wood-plastic door panel micro-foaming molding device, wherein the wood-plastic material is extruded by an extruder and enters an extrusion die. The wood-plastic material is separated by a material dividing body 4 and enters a space formed by a first module 2, a second module 1 and the material dividing body 4 from both sides of the material dividing body 4 for preliminary mixing.

[0046] The wood-plastic material enters the diverter cone support body 6 and is divided into several parts and moves forward through the flow channel. The wood-plastic material is divided into upper and lower layers of material flows respectively by the connecting plate and the cross plate 14. At the end of the connecting plate, the upper and lower layers of relative material flows merge and are divided into material units by the baffle 11.

[0047] The wood-plastic material enters the converging module 15, and the upper and lower layers of the material flows merge. Then the wood-plastic material is divided into a number of square material units around the core rod 12 by the baffle 11. The setting of the baffle 11 forms the wood-plastic material into a number of equal material units. The wood-plastic material only merges at the outlet of the discharge plate 18.

[0048] In order to verify the effect of the present invention, the present invention adopts two sets of extrusion dies, and the difference between the two sets of extrusion dies is that the extrusion die A includes a baffle, and the extrusion die B removes the baffle.

[0049] 200 meters of door panels were produced using extrusion die A and extrusion die B respectively. The experiment found that the door panels produced by extrusion die A had uniform foaming, straight ribs, and no obvious stripes on the panel surface; the door panels produced by extrusion die B had uneven foaming at the joints between the ribs and the panel surface, with obvious bending of the ribs and obvious stripes on the panel surface.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wood plastic door panel micro foaming molding equipment, including an extruder and an extrusion die, characterized in that: The extrusion die comprises a confluence module (15), a core rod (12) is arranged in the confluence module (15), a baffle (11) is vertically arranged between the core rods (12), and the upper and lower end surfaces of the baffle (11) are fixedly connected to the confluence module (15); the baffle (11) is located on the symmetric plane of two adjacent core rods (12), the discharge end of the confluence module (15) is also fixedly connected to a discharge plate (18), the end of the core rod (12) is located in the discharge plate (18), after the wood-plastic material enters the confluence module (15), it is divided into a plurality of square material units around the core rod (12) by the baffle (11), the setting of the baffle (11) forms the wood-plastic material into a plurality of equal material units, and the wood-plastic material is converged at the outlet of the discharge plate (18).

2. According to claim 1, a wood plastic door panel micro-foaming molding equipment is characterized in that: The confluence module (15) comprises a confluence plate (16) and a flat plate (17); the opening of the confluence plate (16) facing the extruder is in a funnel shape; and the baffle (11) is located in the space between the confluence plate (16) and the flat plate (17).

3. The micro-foaming molding equipment for wood-plastic door panels according to claim 1, characterized in that: The feed end of the confluence module (15) is fixedly connected to the core rod support plate (9), and the core rod (12) is fixedly arranged on the core rod support plate (9) and extends into the confluence module (15).

4. The micro-foaming molding equipment for wood-plastic door panels according to claim 3 is characterized in that: The mandrel support plate (9) is hollow in the middle, and a plurality of mandrels (12) are evenly distributed. The upper and lower surfaces of the mandrels (12) are fixedly connected to the upper inner wall and the lower inner wall of the mandrel support plate (9) through the mandrel support (10). The mandrels (12) and the mandrels (12) and the side walls of the mandrel support plate (9) are fixedly connected through a transverse plate (14). The mandrel support (10) is located on the same side of the axis of the mandrel (12).

5. The micro-foaming molding equipment for wood-plastic door panels according to claim 4, characterized in that: The feed end of the core rod support plate (9) is fixedly connected to a diverter cone support plate (6); the diverter cone support plate (6) is hollow in the middle and a plurality of diverter cones (8) are fixedly connected therein; the diverter cones (8) and the diverter cone support plate (6) divide the hollow space of the diverter cone support plate (6) into a plurality of flow channels (7).

6. The micro-foaming molding equipment for wood-plastic door panels according to claim 5, characterized in that: The diverter cones (8) are connected by connecting plates, and the diverter cones (8) at both ends are fixedly connected to the inner side wall of the diverter cone support plate (6) by connecting plates. The diverter cone (8) shrinks toward the extruder and its longitudinal section is triangular as a whole.

7. The micro-foaming molding equipment for wood-plastic door panels according to claim 5, characterized in that: The feed end of the splitter cone support plate (6) is fixedly connected to the second module (1), and the feed end of the second module (1) is fixedly connected to the first module (2). A splitter body (4) is fixedly arranged inside the first module (2) and the second module (1), and an inlet port (3) is arranged on the first module (2).

8. The method for using the wood-plastic door panel micro-foaming molding equipment according to claim 1, characterized in that: After being extruded by the extruder, the wood-plastic material enters the converging module (15) of the extrusion die, and is divided by the baffle (11) into a plurality of square material units surrounding the core rod (12). The setting of the baffle (11) forms the wood-plastic material into a plurality of equal material units, and the wood-plastic material is only combined at the outlet of the discharge plate (18).

9. The method for using the wood-plastic door panel micro-foaming molding equipment according to claim 8, characterized in that: The feed end of the confluence module (15) is fixedly connected to the mandrel support plate (9), and the mandrel (12) is fixedly arranged on the mandrel support plate (9) and extends into the confluence module (15); The mandrel support plate (9) is hollow in the middle, and a plurality of mandrels (12) are evenly arranged, and the upper and lower surfaces of the mandrels (12) are fixedly connected to the upper inner wall and the lower inner wall of the mandrel support plate (9) through the mandrel support (10), and the mandrels (12) and the mandrels (12) and the side walls of the mandrel support plate (9) are fixedly connected through a transverse plate (14), and the mandrel support (10) is located on the same side of the axis of the mandrel (12); The feed end of the mandrel support plate (9) is fixedly connected to a diverter cone support plate (6); the diverter cone support plate (6) is hollow in the middle and a plurality of diverter cones (8) are fixedly connected therein; the diverter cones (8) and the diverter cone support plate (6) divide the hollow space of the diverter cone support plate (6) into a plurality of flow channels (7); The diverter cones (8) are connected by connecting plates, and the diverter cones (8) at both ends are fixedly connected to the inner side wall of the diverter cone support plate (6) through the connecting plates. The diverter cone (8) shrinks toward the extruder and its longitudinal section is triangular as a whole. The connecting plate and the horizontal plate (14) are in close contact and on the same horizontal plane. The wood-plastic material enters the diverter cone support plate (6) and is divided into several parts and moves forward through the flow channel. The wood-plastic material is divided into upper and lower layers of material flows respectively by the connecting plate and the cross plate (14). At the end of the connecting plate, the upper and lower layers of relative material flows merge and are divided into material units by the baffle (11).

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