Raw material mixing device for flame-retardant wood-plastic board

Abstract

The utility model relates to wood -plastic board production equipment technical field especially raw material mixing equipment of flame -retardant wood -plastic board, including mounting bracket and stirring device, be provided with first feeding hopper and second feeding hopper on the mounting bracket, the lower extreme of first feeding hopper is provided with the conveying device that cooperates with stirring device, the lower extreme of second feeding hopper is provided with the material guiding pipe that communicates with stirring device, the lower extreme of stirring device is provided with the discharge pipe, control valve is all set up on the discharge pipe, material guiding pipe and conveying device, be provided with feed pipe on second feeding hopper, be provided with liquid level meter on second feeding hopper, through setting first feeding hopper and second feeding hopper are used to provide wood powder and plastic resin in molten state respectively, before mixing, first heat wood powder through stirring device to the moisture in wood powder, to meet the demand of mixing.

Description

Technical Field

[0001] This utility model relates to the technical field of wood-plastic composite board production equipment, and in particular to a raw material mixing equipment for flame-retardant wood-plastic composite boards. Background Technology

[0002] Wood-plastic composite board is a high-tech, green, and environmentally friendly new decorative material mainly made of wood (wood cellulose, plant cellulose) as the base material, thermoplastic polymer materials (plastics), and processing aids. It is made by mixing the materials evenly and then extruding them through a mold. It combines the properties and characteristics of both wood and plastic and is a new type of composite material that can replace wood and plastic. It is waterproof and moisture-proof, which fundamentally solves the problem that wood products are prone to rotting, swelling, and deformation after absorbing water and moisture in humid and watery environments. It can also be used in environments where traditional wood products cannot be used.

[0003] In the production of wood-plastic composite boards, mixing equipment is needed to achieve rapid and uniform mixing of raw materials. The mixed mixture is then extruded or molded to form wood-plastic composite boards. For example, Chinese patent application publication number CN109847609A discloses "a mixing process for wood-plastic composite flooring raw materials," which uses different feeding steps to improve the mixing effect of wood-plastic composite flooring. Wood powder and PVC are added to the inner mixing cylinder through the first feeding pipe and the second feeding pipe, respectively. The two main materials, wood powder and PVC, are mixed and stirred first, so that the raw materials required for the entire wood-plastic composite flooring are more fully mixed, thereby improving the processing quality of wood-plastic composite flooring and extending its service life.

[0004] However, in actual use, wood flour is prone to absorbing moisture, which can cause the mixture to contain more moisture than normal after mixing, and this can easily affect the quality of the wood-plastic composite board in subsequent production. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as wood powder easily absorbing moisture, resulting in a mixture containing excessive moisture after mixing, which can affect the quality of wood-plastic composite boards in subsequent production. Therefore, this invention proposes a raw material mixing device for flame-retardant wood-plastic composite boards.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a raw material mixing device for flame-retardant wood-plastic composite board, including a mounting frame and a stirring device. The mounting frame is equipped with a first feeding hopper and a second feeding hopper. The lower end of the first feeding hopper is equipped with a conveying device that cooperates with the stirring device. The lower end of the second feeding hopper is equipped with a guide pipe that communicates with the stirring device. The lower end of the stirring device is equipped with a discharge pipe. Control valves are provided on the discharge pipe, the guide pipe, and the conveying device. The second feeding hopper is equipped with a feed pipe and a level gauge.

[0008] Furthermore, the stirring device includes a stirring tank, a stirring paddle is provided inside the stirring tank, a heating layer is provided on the stirring tank, and a driving structure that cooperates with the stirring paddle is provided on the stirring tank.

[0009] Furthermore, the drive structure includes a motor, the output shaft of which is poweredly connected to the stirring paddle via a heat-insulated linkage assembly.

[0010] Furthermore, the linkage component includes a connecting part fixedly mounted on the motor output shaft, a connecting cover fixedly mounted on the stirring paddle, the connecting part being inserted into the connecting cover, and a heat insulation pad being provided between the connecting cover and the connecting part.

[0011] Furthermore, both the connecting cover and the connecting part are provided with threaded holes, and a fixing member that cooperates with the connecting cover and the connecting part is threaded into the threaded hole.

[0012] Furthermore, the conveying device includes a tubular screw conveyor, the input end of which is connected to the first feeding hopper via a connecting pipe, and the output shaft of which is connected to the mixing device.

[0013] The raw material mixing equipment for flame-retardant wood-plastic composite boards proposed in this utility model has the following advantages:

[0014] In this utility model, a first feeding hopper and a second feeding hopper are respectively used to provide wood powder and molten plastic resin. Before mixing, the wood powder is heated by a stirring device to remove the moisture in the wood powder, thereby meeting the mixing requirements.

[0015] Secondly, in this invention, a linkage component is set to drive the stirring paddle to rotate and mix the raw materials. Furthermore, a heat insulation pad is provided inside the linkage component to prevent the heat from the stirring paddle from being transferred to the motor and causing the motor to overheat, thus effectively protecting the motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the raw material mixing equipment for flame-retardant wood-plastic composite boards proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the stirring paddle of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the mixing tank of this utility model;

[0019] Figure 4 This is an enlarged structural diagram of area A of this utility model.

[0020] In the diagram: 1. Mounting frame; 2. Mixing device; 21. Mixing tank; 22. Mixing paddle; 23. Heating layer; 3. First feeding hopper; 4. Second feeding hopper; 41. Guide pipe; 42. Feed pipe; 43. Level gauge; 5. Conveying device; 51. Tubular screw conveyor; 52. Connecting pipe; 6. Control valve; 7. Drive structure; 71. Motor; 72. Linkage assembly; 721. Connecting part; 722. Connecting cover; 723. Heat insulation pad; 724. Fixing component. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A raw material mixing device for flame-retardant wood-plastic composite board includes a mounting frame 1 and a stirring device 2 with heating function. The mounting frame 1 is provided with a first feeding hopper 3 and a second feeding hopper 4. The lower end of the first feeding hopper 3 is provided with a conveying device 5 that cooperates with the stirring device 2. The lower end of the second feeding hopper 4 is provided with a guide pipe 41 that communicates with the stirring device 2. The lower end of the stirring device 2 is provided with a discharge pipe. The discharge pipe, the guide pipe 41 and the conveying device 5 are all provided with control valves 6. The second feeding hopper 4 is provided with a feed pipe 42 and a level gauge 43.

[0023] In this invention, a first feeding hopper 3 and a second feeding hopper 4 are provided to supply wood powder and molten plastic resin, respectively. Before mixing, the wood powder is heated by a stirring device to remove the moisture in the wood powder, thereby meeting the mixing requirements. Then, the molten plastic resin is fed into the stirring device 2 for mixing.

[0024] Furthermore, in this embodiment, the stirring device 2 includes a stirring tank 21 with vent holes to discharge hot air. A stirring paddle 22 is provided inside the stirring tank 21, a heating layer 23 is provided on the stirring tank 21, and a driving structure 7 that cooperates with the stirring paddle 22 is provided on the stirring tank 21. The stirring tank 21 is heated by the heating layer 23 to dry the wood powder inside the stirring tank 21. At the same time, it can also be heated during stirring to prevent the plastic resin from solidifying.

[0025] Furthermore, in this embodiment, the drive structure 7 includes a motor 71. The output shaft of the motor 71 is connected to the stirring paddle 22 via a heat-insulated linkage component 72. The motor 71 drives the stirring paddle 22 to mix and stir the raw materials through the heat-insulated linkage component 72, while also preventing the heat of the stirring paddle 22 from being transferred to the motor 71 and causing the motor 71 to overheat, thus effectively protecting the motor 71.

[0026] It should be noted that, in this embodiment, the linkage component 72 includes a connecting part 721 fixedly mounted on the output shaft of the motor 71, and a connecting cover 722 fixedly mounted on the stirring paddle 22. The connecting part 721 is inserted into the connecting cover 722, and a heat insulation pad 723 is provided between the connecting cover 722 and the connecting part 721. By covering the stirring paddle 22 with the heat insulation pad 723, the heat transferred from the connecting cover 722 to the connecting part 721 is reduced, thereby protecting the motor 71.

[0027] Furthermore, in this embodiment, threaded holes are provided on both the connecting cover 722 and the connecting part 721. A fastener 724 that cooperates with the connecting cover 722 and the connecting part 721 is threaded into the threaded hole. The fastener 724 passes through the connecting cover 722, the heat insulation pad 723 and the connecting part 721, thereby connecting the connecting cover 722 and the connecting part 721 to form an integral structure.

[0028] More specifically, in this embodiment, the conveying device 5 includes a tubular screw conveyor 51. The input end of the tubular screw conveyor 51 is connected to the first feeding hopper 3 through a connecting pipe 52. The output shaft of the tubular screw conveyor 51 is connected to the mixing device 2. The tubular screw conveyor 51 facilitates the conveying of wood powder and effectively prevents blockage. In some embodiments, a knocking structure is provided on the connecting pipe 52 to prevent the connecting pipe 52 from becoming blocked.

[0029] Working method: During operation, the heating layer 23 heats the mixing tank 21 to dry the wood powder inside the mixing tank 21. Molten plastic resin is input into the mixing device 2 for mixing. The motor 71 drives the mixing paddle 22 to mix the raw materials through the heat-insulated linkage component 72.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A raw material mixing device for flame-retardant wood-plastic composite boards, comprising a mounting frame (1) and a mixing device (2), characterized in that: The mounting frame (1) is provided with a first feeding hopper (3) and a second feeding hopper (4). The lower end of the first feeding hopper (3) is provided with a conveying device (5) that cooperates with the stirring device (2). The lower end of the second feeding hopper (4) is provided with a guide pipe (41) that communicates with the stirring device (2). The lower end of the stirring device (2) is provided with a discharge pipe. The discharge pipe, the guide pipe (41) and the conveying device (5) are all provided with control valves (6). The second feeding hopper (4) is provided with a feed pipe (42) and a level gauge (43).

2. The raw material mixing equipment for flame-retardant wood-plastic composite boards according to claim 1, characterized in that: The stirring device (2) includes a stirring tank (21), a stirring paddle (22) is provided inside the stirring tank (21), a heating layer (23) is provided on the stirring tank (21), and a driving structure (7) that cooperates with the stirring paddle (22) is provided on the stirring tank (21).

3. The raw material mixing equipment for flame-retardant wood-plastic composite boards according to claim 2, characterized in that: The drive structure (7) includes a motor (71), the output shaft of which is poweredly connected to the stirring paddle (22) via a heat-insulated linkage assembly (72).

4. The raw material mixing equipment for flame-retardant wood-plastic composite boards according to claim 3, characterized in that: The linkage component (72) includes a connecting part (721) fixedly mounted on the output shaft of the motor (71), a connecting cover (722) fixedly mounted on the stirring paddle (22), the connecting part (721) being inserted into the connecting cover (722), and a heat insulation pad (723) being provided between the connecting cover (722) and the connecting part.

5. The raw material mixing equipment for flame-retardant wood-plastic composite boards according to claim 4, characterized in that: Both the connecting cover (722) and the connecting part (721) are provided with threaded holes, and a fastener (724) that cooperates with the connecting cover (722) and the connecting part (721) is threaded into the threaded hole.

6. The raw material mixing equipment for flame-retardant wood-plastic composite boards according to claim 1, characterized in that: The conveying device (5) includes a tubular screw conveyor (51), the input end of which is connected to the first feeding hopper (3) via a connecting pipe (52), and the output shaft of which is connected to the stirring device (2).

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