Wood-plastic coating mold

Abstract

The utility model relates to the technical field of wood-plastic material processing and application, and provides a wood-plastic coating mold which comprises a first mold plate, a second mold plate, a third mold plate and a fourth mold plate which are sequentially arranged, and a core material runner allowing a core layer material to circulate is formed among the first mold plate, the second mold plate, the third mold plate and the fourth mold plate; the core rod is arranged in the core material runner and is used for shunting the core layer material; a first runner is arranged on the surface of the side, attached to each other, of the second mold plate and the third mold plate and communicates with the core material runner. A second runner is arranged on the surface of the side, attached to each other, of the third mold plate and the fourth mold plate, a plurality of penetrating holes are formed in the third mold plate and used for communicating the second runner with the first runner, and an outer layer material sequentially flows to the second runner and the first runner. The composite material has the effect of improving the firmness degree between the outer layer material and the core layer material.

Description

Technical Field

[0001] The present application relates to the technical field of wood-plastic material processing and application, and in particular to a wood-plastic coating mold. Background Art

[0002] With the continuous development of science and technology, various materials have appeared in our production and life. Co-extrusion materials are the latest generation of reinforced wood-plastic composite products. Wood-plastic, or wood-plastic composite materials, is a new type of composite material that has been booming in recent years at home and abroad. It refers to the use of polyethylene, polypropylene and polyvinyl chloride instead of the usual resin adhesives, mixed with waste plant fibers such as wood powder, rice husks, straw or recycled wood powder, and then through extrusion, molding, injection molding and other plastic processing technology, the production of panels or profiles, which are widely used in building materials, furniture, logistics packaging and other industries.

[0003] The processing molds in the existing technology first press the core layer (mainly wood powder, rod-shaped) into shape, and then cover it with an outer layer (functional co-extruded plastic) according to the shape. After the outer layer material and the core layer material merge at the confluence, the outer layer material flows forward with the core layer material to form a wood-plastic board.

[0004] With regard to the above-mentioned related technologies, the bonding strength between the outer layer material and the core layer material of the wood-plastic board made in this way is low, and the plastic outer layer is easily peeled off, so there is room for improvement. Utility Model Content

[0005] In order to improve the firmness between the outer layer material and the core layer material, the present application provides a wood-plastic coating mold.

[0006] The wood-plastic coating mold provided in this application adopts the following technical solution:

[0007] A wood-plastic coating mold comprises a first template, a second template, a third template and a fourth template which are arranged in sequence, wherein a core material flow channel for core layer material to flow is formed between the first template, the second template, the third template and the fourth template; and further comprises a core rod which is arranged in the core material flow channel and is used to divert the core layer material;

[0008] A first flow channel is arranged on the surface of one side where the second template and the third template are in contact with each other, and the first flow channel is connected to the core material flow channel; a second flow channel is arranged on the surface of one side where the third template and the fourth template are in contact with each other, and the third template is provided with a plurality of perforations, and the perforations are used to connect the second flow channel and the first flow channel, and the outer layer material flows to the second flow channel and the first flow channel in turn.

[0009] By adopting the above technical solution, the core material flows along the core material flow channel, while the outer material flows from the second flow channel to the first flow channel, and the outer material and the core material flow in opposite directions. In the core material flow channel, the core rod divides the core material into two parts, and the outer material is added after the core material is separated, so that the core material can better contact with the outer material, and finally perform compression molding. The above mold can cover the outer material when the core material is still in rod shape, thereby improving the bonding strength between the outer layer (functional co-extruded plastic) and the core layer (mainly wood powder).

[0010] Preferably, it also includes a supporting template, which is connected to the side of the first template away from the second template, the core material flow channel extends into the supporting template, and a feed port is opened at one end of the supporting template away from the first template, and the feed port is connected to the core material flow channel.

[0011] By adopting the above technical solution, the core layer material can enter the core material flow channel through the feed port under pressure and then be formed.

[0012] Preferably, a support mesh is provided on the support template, the support mesh is arranged in the core material flow channel and close to the core rod, the support mesh and the core rod are arranged in sequence along the flow direction of the core layer material; the support mesh is provided with an inclined guide portion, and the inclined guide portion is used to guide the core layer material.

[0013] By adopting the above technical solution, the inclined guide part of the support mesh plate can guide the core layer material, thereby facilitating the diversion of the core layer material by the core rod.

[0014] Preferably, the third template and the fourth template are both provided with a narrowing portion, the narrowing portion is communicated with the core material flow channel, the cross-sectional area of ​​the narrowing portion gradually decreases along the flow direction of the core material flow channel, and the narrowing portion is used to compress the core layer material.

[0015] By adopting the above technical solution, after the core rod divides the core layer material into two parts, the core layer material is fully in contact with the outer layer material, and then the core layer material and the outer layer material are pressed and formed together through the narrowing portion.

[0016] Preferably, it further comprises a forming template, wherein the forming template is connected to a side of the fourth template away from the third template, and a forming section is provided on the forming template, and the forming section is connected to the narrowing portion.

[0017] By adopting the above technical solution, the core layer material and the outer layer material are compressed by the narrowing part and then extruded from the forming section, and the finished wood-plastic product can be obtained after cooling.

[0018] Preferably, the fourth template is provided with a first inlet, a second inlet and a connecting inlet, the second flow channel includes two symmetrically arranged half-flow channels, and the two half-flow channels are respectively located on both sides of the core rod; the connecting inlet is used to connect the two half-flow channels, the first inlet is connected to one of the half-flow channels, and the second inlet is connected to the other half-flow channel, and a height difference is formed between the first inlet and the second inlet.

[0019] By adopting the above technical solution, if the two half-flow channels are fed with outer layer materials of the same color, then the materials are fed from the connecting inlet, and the first inlet and the second inlet are blocked at the same time. If the two half-flow channels are fed with outer layer materials of different colors respectively, then the two outer layer materials are fed from the first inlet and the second inlet respectively, and the connecting inlet is blocked at the same time. By conveying two materials of different colors (the materials can be different) to the extrusion die through different flow channels, a product with two different colors can be processed.

[0020] Preferably, the first template, the second template, the third template and the fourth template are all provided with mounting holes for fasteners to pass through.

[0021] By adopting the above technical solution, the fastener is locked in the installation hole, thereby achieving fixed connection between the first template, the second template, the third template and the fourth template.

[0022] Preferably, the first flow channel includes a plurality of main channels, a plurality of branch channels and a confluence channel, the number of the main channels is less than the branch channels, one main channel is connected to a plurality of the branch channels, each of the branch channels is connected to the confluence channel, and the confluence channel merges the converged outer layer material with the core layer material in the core material flow channel by overflow.

[0023] By adopting the above technical solution, the outer layer materials on each main circuit and each branch circuit converge together and arrive at the confluence channel. After convergence, they merge with the core layer material through overflow, thereby increasing the contact area between the outer layer material and the core layer material.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] (1) By setting a core rod in the core material flow channel, the core rod divides the core material into two parts, and the outer layer material is added after the core material is separated, so that the core material can better contact with the outer layer material. The mold covers the outer layer material when the core material is still in a rod shape, thereby improving the firmness between the outer layer material and the core layer material.

[0026] (2) By setting the support mesh plate, the inclined guide part can guide the core layer material, thereby facilitating the diversion of the core layer material by the core rod.

[0027] (3) By setting the first inlet, the second inlet and the connecting inlet, when two-color co-extrusion is required, the two outer layer materials can enter from the first inlet and the second inlet respectively, and the connecting inlet is blocked at the same time. The two color materials flow through the two half-flow channels respectively, so that both sides of the core layer material can be colored at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a wood-plastic coating mold in an embodiment of the present application;

[0029] Figure 2 is a cross-sectional view of a wood-plastic coating mold in an embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the structure of the first template, the second template, the third template and the fourth template in the embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the structure of the third template in the embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the structure of the fourth template in the embodiment of the present application.

[0033] Figure numerals: 1. Support template; 2. First template; 3. Second template; 4. Third template; 5. Fourth template; 6. Mounting hole; 7. Core material flow channel; 8. Feed port; 9. Support mesh; 10. Inclined guide portion; 11. Core rod; 12. First flow channel; 121. Main channel; 122. Branch channel; 123. Converging channel; 13. Second flow channel; 14. Perforation; 15. First inlet; 16. Second inlet; 17. Connecting inlet; 18. Narrowing portion; 19. Forming template; 20. Forming section. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0035] In the description of the present application, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0038] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples shown in the present application.

[0039] The present application embodiment discloses a wood-plastic coating mold. Figure 1 The wood-plastic coating mold includes a supporting template 1, a first template 2, a second template 3, a third template 4 and a fourth template 5 which are arranged in sequence. The supporting template 1 is fixedly connected to the side of the first template 2 away from the second template 3. The first template 2, the second template 3, the third template 4 and the fourth template 5 are all provided with mounting holes 6 for fasteners to pass through. The fasteners are detachable objects such as fastening bolts or fastening screws. The fasteners are locked in the mounting holes 6, thereby realizing the fixed connection of the first template 2, the second template 3, the third template 4 and the fourth template 5.

[0040] Reference Figure 2 Specifically, a core material flow channel 7 for the core layer material to flow is formed between the first template 2, the second template 3, the third template 4 and the fourth template 5. The core material flow channel 7 extends into the supporting template 1. A feed port 8 is provided at one end of the supporting template 1 away from the first template 2. The feed port 8 has a circular cross-section and is connected to the core material flow channel 7. The core layer material flows into the core material flow channel 7 through the feed port 8.

[0041] A support mesh plate 9 is fixedly connected to the support template 1, and the support mesh plate 9 is located in the core material flow channel 7. A core rod 11 is also fixedly connected in the core material flow channel 7, and the core rod 11 is close to the support mesh plate 9. The support mesh plate 9 and the core rod 11 are arranged in sequence along the flow direction of the core layer material. An inclined guide portion 10 is integrally connected to one end of the support mesh plate 9 away from the core rod 11. The inclined guide portion 10 is used to guide the core layer material, and the core rod 11 is used to divert the core layer material.

[0042] Reference Figure 3 and Figure 4 , wherein a first flow channel 12 is provided on the surface of one side where the second template 3 and the third template 4 are attached to each other, the first flow channel 12 is connected to the core material flow channel 7, and is used for the outer layer material to flow in. As shown in the figure, the first flow channel 12 includes four main channels 121, sixteen branch channels 122 and a confluence channel 123, each main channel 121 is connected to four branch channels 122, and the sixteen branch channels 122 converge together and communicate with the confluence channel 123, the confluence channel 123 is arranged in an annular manner, and the converged outer layer material merges with the core layer material by overflow.

[0043] Reference Figure 5 A second flow channel 13 is provided on the surface of one side where the third template 4 and the fourth template 5 are attached to each other, and a plurality of perforations 14 are provided on the third template 4. Each perforation 14 is symmetrically distributed on the third template 4 and is used to connect the second flow channel 13 and the first flow channel 12. As shown in the figure, there are four perforations 14, and the four perforations 14 are connected to four main paths 121 respectively, and the outer layer material flows from the second flow channel 13 to the first flow channel 12.

[0044] Under pressure, the core material can enter the core material flow channel 7 through the feed port 8, and the core material flows along the core material flow channel 7; while the outer material flows along the second flow channel 13 to the first flow channel 12, and the outer material and the core material flow in opposite directions. In the core material flow channel 7, the core rod 11 divides the core material into two parts, and the outer material is added after the core material is separated, so that the core material can better contact with the outer material, and finally compression molding is performed. The coating mold can coat the outer material when the core material is still in rod shape, thereby improving the bonding strength between the outer layer (functional co-extruded plastic) and the core layer (mainly wood powder).

[0045] Reference Figure 5 , wherein the fourth template 5 is provided with a first inlet 15, a second inlet 16 and a connecting inlet 17, the second flow channel 13 includes two symmetrically arranged half-flow channels, and the two half-flow channels are respectively located on both sides of the core rod 11; the connecting inlet 17 is used to connect the two half-flow channels, the first inlet 15 is connected to one of the half-flow channels, and the second inlet 16 is connected to the other half-flow channel, and a height difference is formed between the first inlet 15 and the second inlet 16.

[0046] During the injection molding process, if the two half-flow channels are fed with outer layer materials of the same color, then the materials are fed from the connecting inlet 17, and the first inlet 15 and the second inlet 16 are blocked. If the two half-flow channels are fed with outer layer materials of different colors, the two outer layer materials are fed from the first inlet 15 and the second inlet 16 respectively, and the connecting inlet 17 is blocked. By conveying two materials of different colors (the materials can be different) to the extrusion mold through different flow channels, a wood-plastic product with two different colors is processed to meet the diversified production needs.

[0047] Reference Figure 2 In addition, the third template 4 and the fourth template 5 are integrally formed with a narrowing portion 18, which is in the shape of an isosceles trapezoid and is connected to the core material flow channel 7. The cross-sectional area of ​​the narrowing portion 18 gradually decreases along the flow direction of the core material flow channel 7, and the narrowing portion 18 is used to compress the core layer material. The fourth template 5 is also fixedly connected to a molding template 19 on the side away from the third template 4. The molding template 19 is provided with a molding section 20, which is rectangular and connected to the narrowing portion 18. After the core rod 11 divides the core layer material into two parts, the core layer material is fully in contact with the outer layer material, and then the core layer material and the outer layer material are pressed and formed together through the narrowing portion 18, and finally extruded from the molding section 20. After cooling, the finished wood-plastic product can be obtained.

[0048] The implementation principle of a wood-plastic coating mold in an embodiment of the present application is as follows: the core material can enter the core material flow channel 7 through the feed port 8 under pressure; while the outer layer material flows from the second flow channel 13 to the first flow channel 12, and the flow directions of the outer layer material and the core layer material are opposite. In the core material flow channel 7, the core rod 11 divides the core material into two parts, and the outer layer material is added after the core material is separated, so that the core material can better contact with the outer layer material. The core layer material and the outer layer material are pressed together through the narrowing portion 18, and finally extruded from the molding section 20, and the finished wood-plastic can be obtained after cooling.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wood-plastic coating mold, characterized in that: The invention comprises a first template (2), a second template (3), a third template (4) and a fourth template (5) which are arranged in sequence, wherein a core material flow channel (7) for core layer material to flow is formed between the first template (2), the second template (3), the third template (4) and the fourth template (5); and further comprises a core rod (11), wherein the core rod (11) is arranged in the core material flow channel (7) and is used to divert the core layer material; A first flow channel (12) is provided on a surface of a side where the second template (3) and the third template (4) are in contact with each other, and the first flow channel (12) is connected to the core material flow channel (7); a second flow channel (13) is provided on a surface of a side where the third template (4) and the fourth template (5) are in contact with each other, and a plurality of perforations (14) are provided on the third template (4), and the perforations (14) are used to connect the second flow channel (13) and the first flow channel (12), and the outer layer material flows to the second flow channel (13) and the first flow channel (12) in sequence.

2. A wood-plastic coating mold according to claim 1, characterized in that: The invention also comprises a supporting template (1), wherein the supporting template (1) is connected to a side of the first template (2) away from the second template (3), the core material flow channel (7) is extended into the supporting template (1), and a feed port (8) is provided at one end of the supporting template (1) away from the first template (2), and the feed port (8) is connected to the core material flow channel (7).

3. A wood-plastic coating mold according to claim 2, characterized in that: The support template (1) is provided with a support mesh plate (9), the support mesh plate (9) is arranged in the core material flow channel (7) and close to the core rod (11), and the support mesh plate (9) and the core rod (11) are arranged in sequence along the flow direction of the core layer material; the support mesh plate (9) is provided with an inclined guide portion (10), and the inclined guide portion (10) is used to guide the core layer material.

4. A wood-plastic coating mold according to claim 1, characterized in that: The third template (4) and the fourth template (5) are both provided with a narrowing portion (18), the narrowing portion (18) being in communication with the core material flow channel (7), the cross-sectional area of ​​the narrowing portion (18) gradually decreasing along the flow direction of the core material flow channel (7), and the narrowing portion (18) being used to compress the core layer material.

5. A wood-plastic coating mold according to claim 4, characterized in that: It also comprises a forming template (19), the forming template (19) being connected to a side of the fourth template (5) away from the third template (4), the forming template (19) being provided with a forming section (20), the forming section (20) being arranged in communication with the narrowing portion (18).

6. A wood-plastic coating mold according to claim 1, characterized in that: The fourth template (5) is provided with a first inlet (15), a second inlet (16) and a connecting inlet (17); the second flow channel (13) comprises two symmetrically arranged half-flow channels, the two half-flow channels are respectively located on both sides of the core rod (11); the connecting inlet (17) is used to connect the two half-flow channels, the first inlet (15) is connected to one of the half-flow channels, the second inlet (16) is connected to the other half-flow channel, and a height difference is formed between the first inlet (15) and the second inlet (16).

7. A wood-plastic coating mold according to claim 1, characterized in that: The first template (2), the second template (3), the third template (4) and the fourth template (5) are all provided with mounting holes (6) for fasteners to pass through.

8. The wood-plastic coating mold according to claim 1, characterized in that: The first flow channel (12) comprises a plurality of main channels (121), a plurality of branch channels (122) and a converging channel (123); the number of the main channels (121) is less than the number of the branch channels (122); one main channel (121) is connected to a plurality of the branch channels (122); each of the branch channels (122) is connected to the converging channel (123); the converging channel (123) merges the converged outer layer material with the core layer material in the core material flow channel (7) by overflow.

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