Plate blank preheating tool for high-density fiberboard production

Abstract

The utility model belongs to the technical field of fiberboard production, and particularly relates to a board blank preheating tool for high-density fiberboard production, which comprises a preheating tool body, a dust removal device and a preheating device are sequentially arranged on a support frame along the material advancing direction, the dust removal device and the preheating device are arranged in a step shape, and the preheating device comprises a box body. A heat supply device is arranged above the box body, an output pipe designed in an L shape is arranged on one side of the heat supply device, a preheating device is arranged on the upper portion in the box body, a heat distributor is arranged on the outer side of the heat supply pipe, and an auxiliary heating device is arranged in the position, located in the middle of the conveying belt, in the box body. The device is reasonable in design, simple in structure, convenient to machine and capable of preheating a plate to be machined and reducing the temperature difference between the upper surface and the lower surface of a plate blank, so that the forming quality of a workpiece is ensured, the working progress is guaranteed, and the use requirement is effectively met.

Description

Technical Field

[0001] This utility model belongs to the field of fiberboard production technology, and in particular relates to a preheating tool for high-density fiberboard production. Background Technology

[0002] Fiberboard is a type of engineered wood product made from wood fibers or other plant fibers through processes such as fiber separation, gluing, drying, laying and molding, and hot pressing.

[0003] Currently, after fiberboard is laid out and formed, it is transported to a hot pressing process for hot pressing to produce finished fiberboard products. However, in existing technologies, the temperature of the fiberboard blank after laying out and forming is generally at room temperature. This limits its hot pressing process due to the low temperature of the fiberboard blank, which to some extent affects the hot pressing process. Considering the poor thermal conductivity of fiberboard raw materials, this results in a long hot pressing cycle and a large temperature difference between the inside and outside of the blank during hot pressing, directly affecting product quality and production capacity. To solve the above problems, we provide a preheating fixture for high-density fiberboard production that is reasonably designed, simple in structure, easy to process, and can preheat the blank to be processed. This fixture can increase the temperature of the upper and lower surfaces of the blank to a certain extent, thereby reducing the temperature difference between the upper and lower surfaces of the blank. This provides a prerequisite for the subsequent production process of the blank, ensures the work progress, and effectively meets the needs of use. Utility Model Content

[0004] This utility model addresses the technical problems existing in the above-mentioned fiberboard blank processing process by proposing a high-density fiberboard blank preheating fixture that is reasonably designed, simple in structure, easy to process, and can achieve preheating treatment of the blank to be processed, thereby increasing the temperature of the upper and lower surfaces of the blank to a certain extent, reducing the temperature difference between the upper and lower surfaces of the blank, providing a prerequisite for the subsequent production and processing of the workpiece, ensuring the work process, and effectively meeting the usage requirements.

[0005] To achieve the above objectives, the present invention adopts a preheating fixture for high-density fiberboard production, comprising a preheating fixture body, a support frame, a conveyor belt above the support frame, a dust removal device and a preheating device arranged sequentially along the material travel direction on the support frame, the dust removal device and the preheating device being arranged in a stepped manner, the preheating device comprising a housing, a heat supply device above the housing, an L-shaped output pipe on one side of the heat supply device, a preheating device above the housing, the preheating device comprising a heat supply pipe connected to the output pipe, a heating nozzle below the heat supply pipe, a heat distributor on the outside of the heat supply pipe for receiving heat source and outputting it towards the direction close to the conveyor belt, and an auxiliary heating device located in the housing at the middle position of the conveyor belt.

[0006] Preferably, the heat exchanger includes a hollow rectangular frame, a folded flow divider plate is disposed inside the frame, a conical cover is disposed above the flow divider plate, and a through hole is provided at the bend on one side of the flow divider plate, with multiple through holes arranged in a mirror image around the geometric center of the flow divider plate.

[0007] Preferably, the auxiliary heating device includes an auxiliary heating pipe, and an auxiliary heating nozzle is provided on the auxiliary heating pipe near the side of the conveyor belt.

[0008] Preferably, the heat supply device includes a mounting box, a fan is installed above the mounting box, an electric heating plate is installed inside the mounting box, and a heat collection cover with a tapered opening from top to bottom is installed in the mounting box below the electric heating plate, and the bottom of the heat collection cover is connected to the output pipe.

[0009] Preferably, the dust removal equipment includes a housing, with air supply pipes provided on both the upper and lower sides of the housing, and one end of the air supply pipes extending to the outside of the housing. Dust removal nozzles are provided on the air supply pipes near the conveyor belt, and are respectively placed on the upper and lower sides of the conveyor belt.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. This utility model provides a preheating fixture for high-density fiberboard production. Utilizing a preheating device, heat sources are supplied to both the preheating device and the auxiliary heating device, acting on the upper and lower surfaces of the workpiece. This ensures the workpiece is preheated while significantly reducing the temperature difference between the upper and lower surfaces, guaranteeing it meets processing requirements for subsequent steps and ensuring molding quality. The included dust removal equipment cleans the outer surface of the workpiece beforehand, preventing impurities from affecting the hot-pressing process and meeting usage requirements. This device is rationally designed, simple in structure, and easy to process, enabling preheating of the workpiece and increasing the temperature of the upper and lower surfaces to reduce the temperature difference, ensuring smooth operation and effectively meeting usage needs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of a preheating fixture for high-density fiberboard production;

[0014] Figure 2 A partial front view of the internal structure of a preheating fixture for high-density fiberboard production;

[0015] Figure 3 A side view of the structure of a preheating fixture for high-density fiberboard production;

[0016] Figure 4 This is a side view of part of the internal structure of the heat supply device;

[0017] Figure 5 This is a bottom view schematic diagram of the heat exchanger structure;

[0018] Figure 6 This is a schematic diagram of part of the internal structure of the heat exchanger;

[0019] In the above figures, 1. Support frame; 2. Conveyor belt; 3. Dust removal equipment; 31. Shell; 32. Air supply pipe; 33. Dust removal nozzle; 4. Preheating equipment; 41. Box; 42. Heat supply device; 421. Mounting box; 422. Fan; 423. Electric heating plate; 424. Heat collection cover; 43. Output pipe; 44. Preheating device; 441. Heat supply pipe; 442. Heating nozzle; 5. Heat distributor; 51. Frame; 52. Diverter plate; 521. Through hole; 53. Cover; 6. Auxiliary heating device; 61. Auxiliary heating pipe; 62. Auxiliary heating nozzle. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Examples, such as Figures 1-6As shown, a preheating fixture for high-density fiberboard (HDF) production includes a preheating fixture body. In this embodiment, the preheating fixture body is installed in the process before hot pressing, that is, it receives the externally transported slab, first cleans the workpiece, then preheats it, and then transports it to the hot pressing area. The preheated slab provides convenient conditions for the hot pressing operation, which can reduce the excessive temperature difference between the upper and lower surfaces of the workpiece to a certain extent and ensure its processing quality. Further, the preheating fixture body includes a support frame 1 to ensure the stability of the device's position. A conveyor belt 2 is installed above the support frame 1, wherein the selected conveyor belt 2 is a chain plate. This design facilitates preheating of the upper and lower surfaces of the workpiece. A dust removal device 3 and a preheating device 4 are sequentially arranged on the support frame 1 along the material travel direction. The dust removal device 3 can pre-clean the outer surface of the workpiece to prevent impurities from affecting the hot pressing process and meeting usage requirements. The dust removal device 3 and the preheating device 4 are arranged in a stepped configuration. This design is based on the different functions of the two devices: the former is used to clean the upper and lower surfaces of the workpiece, while the latter is used to preheat the workpiece, especially the lower surface, where a larger distance would affect the preheating effect. Furthermore, the preheating device 4 includes a housing 41, with a [missing information - likely a design element] positioned on top of the housing 41. A heating device 42 is provided, with an L-shaped output pipe 43 on one side. The heating device 42 generates heated air, which is then applied to the workpiece surface via the output pipe 43 to ensure preheating, particularly reducing the temperature difference between the upper and lower surfaces of the workpiece, thus meeting the requirements of subsequent processing. A preheating device 44 is located at the top of the housing 41. The preheating device 44 includes a heat supply pipe 441 connected to the output pipe 43. A heating nozzle 442 is located below the heat supply pipe 441. A heat exchanger 5 is located on the outside of the heat supply pipe 441 to receive the heat source and output it towards the direction close to the conveyor belt 2. The housing 41 is located in the middle of the conveyor belt 2. An auxiliary heating device 6 is installed inside. Specifically, the heating device 42 generates heated air and delivers it to the heating pipe 441 through the output pipe 43. Finally, it is sprayed onto the workpiece through the heating nozzle 442. The heated air sprayed by the preheating device 44 heats the upper surface of the workpiece, while the heated air sprayed by the auxiliary heating device 6 heats the lower surface of the workpiece, so that the temperature of the upper and lower surfaces of the workpiece is relatively consistent, which provides convenient conditions for the subsequent hot pressing work and meets the usage requirements. The establishment of the heat distributor 5 makes the hot air spray range more uniform and reasonable to a certain extent, ensuring the consistency of the preheating process and guaranteeing the work progress.

[0023] In the above process: the preheating device 44 can supply heat to both the preheating device 44 and the auxiliary heating device 6, and act on the upper and lower surfaces of the conveyed workpiece. While ensuring that the workpiece can be preheated, it can also significantly reduce the temperature difference between the upper and lower surfaces of the workpiece, ensuring that it meets the processing conditions when conveyed to subsequent processing steps, thus guaranteeing the molding quality. The dust removal device 3 can pre-clean the outer surface of the workpiece to prevent it from being affected by impurities and thus affecting the hot pressing process, meeting the usage requirements. This device is reasonably designed, simple in structure, easy to process, and can achieve preheating treatment of the workpiece to be processed, thereby increasing the temperature of the upper and lower surfaces of the slab to a certain extent, reducing the temperature difference between the upper and lower surfaces of the slab, ensuring the work process, and effectively meeting the usage requirements.

[0024] To achieve uniform spraying of hot air and ensure the preheating effect on the workpiece surface, the heat distributor 5 includes a hollow rectangular frame 51. Inside the frame 51 is a folded flow divider 52. Above the flow divider 52 is a conical cover 53. Through holes 521 are opened at the bend on one side of the flow divider 52. Multiple through holes 521 are arranged in a mirror image around the geometric center of the flow divider 52. Specifically, the preheating device 44 receives the hot gas delivered by the heating device 42 and sprays it through the heating nozzle 442 into the cover 53. At this time, the hot gas is discharged outwards through the through holes 521, and on the other hand... The surface can be evenly distributed laterally along the bend of the flow divider 52 to ensure the preheating range. It should be further explained that the through holes 521 can be oriented in two ways: one is to spray towards the rear, and the other is to spray towards the front. The spraying direction is limited by the geometric center of the flow divider 52. The purpose of this design is to ensure that the hot gas has a certain spraying range in the lateral direction and a good spraying range in the longitudinal direction. When spraying towards the front or rear, the direction of the hot gas is limited by the bend of the flow divider 52, which in particular ensures that it can be sprayed onto the surface of the workpiece, ensuring the preheating effect and meeting the usage requirements.

[0025] To ensure the preheating effect of the workpiece, the auxiliary heating device 6 includes an auxiliary heating pipe 61. An auxiliary heating nozzle 62 is installed on the auxiliary heating pipe 61 near the conveyor belt 2. Specifically, the auxiliary heating device 6 is connected to the heat delivery device 42 of the preheating equipment 4 and is used to receive air with heat. When the heat delivery device 42 delivers heat, it is delivered to the auxiliary heating pipe 61 through the output pipe 43 and then sprayed out by the auxiliary heating nozzle 62, acting on the lower surface of the workpiece. This allows the upper and lower surfaces of the workpiece to be preheated evenly, further reducing the situation of excessive temperature difference between the upper and lower surfaces of the workpiece and ensuring the progress of the work.

[0026] To ensure the smooth preheating of the workpiece, the heating device 42 includes a mounting box 421. A fan 422 is installed above the mounting box 421. An electric heating plate 423 is installed inside the mounting box 421. Below the electric heating plate 423, a heat collection hood 424 with a tapered design from top to bottom is installed inside the mounting box 421. The bottom of the heat collection hood 424 is connected to the output pipe 43. Specifically, the electric heating plate 423 is a conventional method that uses electricity to heat a resistance wire. The heat is generated, and then the operation of the fan 422 collects the heat through the heat collection hood 424 and transports it to the heat delivery pipe 441 through the output pipe 43. Finally, it is sprayed onto the workpiece through the heating nozzle 442. The hot air sprayed by the preheating device 44 heats the upper surface of the workpiece, and the hot air sprayed by the auxiliary heating device 6 heats the lower surface of the workpiece, so that the temperature of the upper and lower surfaces of the workpiece is relatively consistent, which provides convenient conditions for the subsequent hot pressing work and meets the use requirements.

[0027] To further improve the rationality of the device setup, the dust removal equipment 3 includes a housing 31. Air supply pipes 32 are installed on both the upper and lower sides of the housing 31, with one end of each pipe extending to the outside of the housing 31. Dust removal nozzles 33 are installed on the air supply pipes 32 near the conveyor belt 2, positioned on the upper and lower sides of the conveyor belt 2 respectively. Specifically, one end of each of the upper and lower air supply pipes 32 is connected to an external air supply device to input dust removal gas. The gas is then transported through pipelines to the dust removal nozzles 33 and sprayed onto the fiberboard blank, thereby cleaning the workpiece surface, such as dust, providing convenient conditions for subsequent hot pressing, preventing impurities from affecting the blank during hot pressing, and ensuring processing quality.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A preheating fixture for high-density fiberboard (HDF) production, comprising a preheating fixture body, the preheating fixture body including a support frame, and a conveyor belt disposed above the support frame, characterized in that, The support frame is equipped with dust removal equipment and preheating equipment arranged sequentially along the material travel direction. The dust removal equipment and preheating equipment are arranged in a stepped manner. The preheating equipment includes a box body, and a heat delivery device is arranged on the top of the box body. An L-shaped output pipe is arranged on one side of the heat delivery device. The preheating device is arranged on the top of the box body. The preheating device includes a heat delivery pipe connected to the output pipe. A heating nozzle is arranged below the heat delivery pipe. A heat distributor is arranged on the outside of the heat delivery pipe to receive the heat source and output it in the direction close to the conveyor belt. An auxiliary heating device is arranged in the box body located in the middle of the conveyor belt.

2. The preheating fixture for high-density fiberboard production according to claim 1, characterized in that, The heat exchanger includes a hollow rectangular frame, a folded flow divider plate inside the frame, and a cone-shaped cover above the flow divider plate. A through hole is provided at the bend on one side of the flow divider plate, and multiple through holes are arranged in a mirror image around the geometric center of the flow divider plate.

3. The preheating fixture for high-density fiberboard production according to claim 2, characterized in that, The auxiliary heating device includes an auxiliary heating pipe, and an auxiliary heating nozzle is provided on the auxiliary heating pipe near the side of the conveyor belt.

4. The preheating fixture for high-density fiberboard production according to claim 3, characterized in that, The heat supply device includes an installation box, a fan is installed above the installation box, an electric heating plate is installed inside the installation box, and a heat collection hood with a tapered opening from top to bottom is installed below the electric heating plate in the installation box, and the bottom of the heat collection hood is connected to the output pipe.

5. The preheating fixture for high-density fiberboard production according to claim 3, characterized in that, The dust removal equipment includes a housing, with air supply pipes provided on both the upper and lower sides of the housing. One end of the air supply pipe extends to the outside of the housing. Dust removal nozzles are provided on the air supply pipes near the conveyor belt, and are respectively placed on the upper and lower sides of the conveyor belt.

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