Dustless sander

Abstract

The application discloses a dust-free sander, which comprises a sand belt driving unit, a dust removal integrated unit and a feeding regulation unit. The sand belt driving unit is composed of two driving roller shafts, a tension roller shaft and a 45-degree triangular sand belt formed in a ring shape. The sand belt driven by the tension roller shaft can enhance the cleaning accessibility. The dust removal integrated unit comprises a dust collection hopper, a negative pressure fan and a tapered suction pipe. The suction inlet of the tapered suction pipe is directly opposite to the tension roller shaft. The cross-section of the tapered suction pipe is designed to gradually decrease, which cooperates with 50% air volume ratio to form a local high-pressure airflow, so that the sand belt impurities can be efficiently stripped. The feeding regulation unit drives the lifting base plate and the feeding compression roller with anti-skid texture through a pressure servo motor, so as to dynamically regulate the workpiece feeding speed and the compression force. The sander can realize self-cleaning during sand belt operation, reduce downtime maintenance, and improve the sanding uniformity and equipment stability.

Description

Technical Field

[0001] This application relates to the field of wood production technology, and more specifically, to a dust-free sander. Background Technology

[0002] Sanding machines are commonly used equipment in wood production. During operation, the sanding belt of existing sanders accumulates a large amount of sawdust, dust, and other impurities. These impurities not only affect the lifespan of the sanding belt but also negatively impact the sanding effect. For example, the accumulation of impurities can lead to an uneven sanding surface, resulting in scratches and uneven sanding. Furthermore, if the sanding belt is not cleaned promptly, impurities may enter other parts of the sander, causing equipment malfunctions, increasing maintenance costs and downtime, and reducing production efficiency. Therefore, developing a dust-free sander is of significant practical importance. Utility Model Content

[0003] This application provides a dust-free sander, including a belt drive unit, a dust removal integrated unit, and a feeding control unit. The belt drive unit comprises two parallel drive rollers, a vertically adjustable tension roller, and a sanding belt forming a triangular structure around the three components. The dust removal integrated unit includes a dust collection hopper, a negative pressure fan communicating with the conical opening of the dust collection hopper, and a tapered suction tube connected at one end to the negative pressure fan with its inlet facing the tension roller. The feeding control unit is located above the worktable and includes a pressure servo motor, a lifting base plate mounted on the output end of the pressure servo motor, and a feeding pressure roller with anti-slip texture located at the bottom of the lifting base plate.

[0004] The tension roller shaft is used to maintain the sanding belt by spreading it outward along the curved surface to increase the gap, so that the tapered adsorption tube can peel off impurities from the sanding belt surface through local high-pressure airflow. The feeding roller adjusts the workpiece feed speed by rotating its rotation speed and dynamically controls the workpiece pressing force by the pressure servo motor.

[0005] In some embodiments, the sanding belt drive unit further includes a heat exchange assembly, which includes a heat-conducting base that matches the contour of the triangular frame, and a heat exchange pipeline array that is distributed along the three sides of the triangle and cools and dissipates heat from the sanding belt.

[0006] In some embodiments, the inlet section of the tapered adsorption tube has a gradually decreasing cross-section and its air volume accounts for 50% of the total air volume of the negative pressure fan.

[0007] In some embodiments, the sidewall of the tapered adsorption tube is designed with a smooth flow channel of equal cross-section to prevent airflow disturbance from affecting the dust collection hopper's capture efficiency of impurities in the sanding area.

[0008] In some embodiments, the dust collection hoppers are spaced apart directly below the sanding belt drive unit, with their conical dust collection ports facing the sanding surface to receive waste, and the outlet of the negative pressure fan is connected to the central dust removal duct.

[0009] In some embodiments, the two drive rollers are located on the worktable plane within the triangular frame, and the tension rollers are suspended below the worktable to form the vertices of an isosceles triangle with an included angle of 45 degrees.

[0010] In some embodiments, the top surface of the heat-conducting base is flush with the workbench surface within the triangular frame, ensuring that the heat exchange assembly does not interfere with the sanding workspace.

[0011] In some embodiments, the anti-slip texture on the surface of the feed roller is a hemispherical bump or a spiral ridge structure, used to eliminate relative displacement of the workpiece.

[0012] In some embodiments, the negative pressure fan synchronously drives the negative pressure collection function of the dust collection hopper and the directional cleaning function of the tapered adsorption tube, with the tapered adsorption tube independently removing accumulated impurities in the tension roller area.

[0013] In some embodiments, the tapered adsorption tube is provided with multiple dividing plates inside to form multiple sub-channels inside the tube.

[0014] The sander of this application unfolds the sanding belt through the curved surface of the tension roller shaft, and achieves self-cleaning of the sanding belt by means of high-pressure airflow through the tapered adsorption tube, which effectively removes wood chips and impurities, improves sanding uniformity and extends the life of the sanding belt; the feeding pressure roller dynamically controls the feed speed and pressing force to ensure processing accuracy while reducing equipment failure rate.

[0015] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0017] Figure 1 This is a half-sectional schematic diagram of the overall structure of the embodiment of this application;

[0018] Figure 2 yes Figure 1 An enlarged view of part A in the image;

[0019] Figure 3 This is a schematic diagram of the tension roller shaft and the tapered adsorption tube from another side.

[0020] Explanation of main component symbols: Sander 100, Sanding belt drive unit 10, Drive roller 11, Tension roller 12, Sanding belt 13, Heat exchange assembly 14, Heat-conducting base 141, Heat exchange tube 142, Dust removal integrated unit 20, Dust collection hopper 21, Negative pressure fan 22, Gradient adsorption tube 23, Dividing plate 24, Feeding control unit 30, Pressure servo motor 31, Lifting base plate 32, Feeding pressure roller 33, Outer cover 34, Support 40, Wooden board 400. Detailed Implementation

[0021] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout.

[0022] Furthermore, the embodiments of this application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figure 1 and Figure 2 This application provides a sander 100 with a self-cleaning function for the sanding belt 13, comprising a sanding belt drive unit 10, a dust removal integrated unit 20, and a feeding control unit 30. The sanding belt drive unit 10 comprises two parallel drive rollers 11, a vertically adjustable tension roller 12, and a sanding belt 13 forming a triangular structure around the three components. The dust removal integrated unit 20 comprises a dust collection hopper 21, a negative pressure fan 22 communicating with the conical opening of the dust collection hopper 21, and a tapered suction tube 23 connected at one end to the negative pressure fan 22 with its suction inlet facing the tension roller 12. The feeding control unit 30 is located above the worktable and includes a pressure servo motor 31, a lifting base plate 32 mounted on the output end of the pressure servo motor 31, and a feeding pressure roller 33 with anti-slip texture located at the bottom of the lifting base plate 32.

[0025] The tension roller 12 is used to maintain the curved surface of the sanding belt 13 to expand the gap along the curved surface, so that the tapered adsorption tube 23 can peel off the impurities on the surface of the sanding belt 13 through local high-pressure airflow. The feeding roller 33 adjusts the workpiece feeding speed by rotating the roller and dynamically controls the workpiece pressing force by the pressure servo motor 31.

[0026] The sander 100 of this application unfolds the sanding belt 13 through the curved surface of the tension roller shaft 12, and the high-pressure airflow of the gradually shrinking adsorption tube 23 realizes the self-cleaning of the sanding belt 13, effectively removing wood chips and impurities, improving sanding uniformity and extending the life of the sanding belt 13; the feeding pressure roller 33 dynamically controls the feeding speed and pressing force to ensure processing accuracy while reducing equipment failure rate.

[0027] The belt sander unit 10 includes a drive roller shaft 11, a tension roller shaft 12, a sanding belt 13, and a heat exchange assembly 14. Two drive roller shafts 11 are arranged parallel to each other on the worktable to drive the sanding belt 13 for sanding operations. The tension roller shaft 12 is located below the worktable and can move up and down to adjust the tension of the sanding belt 13 and facilitate belt replacement. The two drive roller shafts 11 and the tension roller shaft 12 together form a stable triangular structure, specifically a 45-degree isosceles triangle. This structural design ensures that the entire belt sander unit 10 remains stable during operation and will not shake due to external forces.

[0028] The sanding belt 13 is wrapped around the drive roller shaft 11 and the tension roller shaft 12. Driven by them, the sanding belt 13 drives the sandpaper to perform sanding operations. The heat exchange assembly 14 consists of a heat-conducting base 141 and a heat exchange tube 142, which is used to cool the sanding belt 13 to prevent it from overheating due to prolonged operation and affecting the sanding effect.

[0029] The heat-conducting base 141 is shaped to fit a triangular structure, with its top surface aligned with the workbench surface to ensure that the heat exchange assembly 14 does not interfere with sanding operations. Multiple heat exchange tubes 142 are distributed along the three sides of the triangle, their function being to cool the sanding belt 13 in a circumferential manner. This ensures that the sanding belt 13 remains within a suitable temperature range during prolonged operation. In other embodiments, the heat exchange assembly 14 includes a thermistor for monitoring the temperature of the sanding belt 13 to adjust the heat exchange efficiency of the heat exchange tubes 142.

[0030] Please continue reading. Figure 1 and Figure 2The dust collection integrated unit 20 includes a dust collection hopper 21, a negative pressure fan 22, and a tapered adsorption pipe 23. The dust collection hopper 21 is intermittently positioned directly below the sanding belt drive unit 10, and is conical in shape, with its open portion facing the sanding belt drive unit 10 to effectively collect various wastes generated during the sanding process. The negative pressure fan 22 is installed below the dust collection hopper 21 and connected to its conical opening via a pipe. The main function of the negative pressure fan 22 is to ventilate the dust collection hopper 21, effectively sucking in and collecting fine particles such as dust and sawdust generated during the sanding process. The outlet of the negative pressure fan 22 is connected to the main ductwork within the plant to discharge various wastes.

[0031] One end of the tapered adsorption tube 23 is connected to the negative pressure fan 22, and the other end is located directly below the tension roller 12. Its inlet section features a gradually decreasing cross-section design, which effectively generates high-pressure suction to maximize the adsorption effect. To achieve this high-pressure suction, the air volume of the tapered adsorption tube 23 accounts for half of the total air volume of the negative pressure fan 22 (50% of the total air volume of the negative pressure fan 22). Furthermore, to avoid affecting the adsorption effect of the negative pressure fan 22 on the upper sand belt drive unit 10, the sides of the tapered adsorption tube 23 are intentionally designed to be smooth, preventing the nozzle from gradually narrowing, thus ensuring the efficient operation of the entire dust removal integrated unit 20 and the stability of the adsorption effect.

[0032] Furthermore, please combine Figure 3 Inside the tapered adsorption tube 23, multiple uniformly distributed and spaced dividing plates 24 are arranged. The dividing plates 24 divide the interior of the adsorption tube into multiple independent sub-channels to ensure uniform distribution during gas flow. Through the multi-sub-channel design, the adsorption capacity of the adsorption tube is significantly improved, thereby achieving a more efficient and uniform adsorption effect, further improving the overall performance and the reliability of gas treatment.

[0033] The feeding control unit 30 is mounted above the worktable via a bracket. It is used to press the wooden board downwards for sanding and to control the speed at which the board moves forward. The feeding control unit 30 includes a pressure servo motor 31, a lifting base plate 32, and a feeding roller 33. The pressure servo motor 31 is mounted on the bracket, the lifting base plate 32 is mounted on the output shaft of the pressure servo motor 31, and the feeding roller 33 is located on the lower surface of the lifting base plate 32. The surface of the feeding roller 33 has an anti-slip texture with hemispherical protrusions or spiral ridges to increase friction. The speed at which the wooden board moves forward is controlled by controlling the rotational speed of the feeding roller 33, and the pressure on the wooden board is controlled by controlling the pressure servo motor 31.

[0034] The feeding control unit 30 is securely mounted above the worktable via a bracket. It applies downward pressure to compress the wooden board, enabling smooth sanding and controlling the board's forward speed during processing. The feeding control unit 30 includes a pressure servo motor 31, a lifting base plate 32, a feeding roller 33, and an outer cover 34. Specifically, the pressure servo motor 31 is mounted on the bracket, while the lifting base plate 32 is directly mounted on the output shaft of the pressure servo motor 31, serving as a connection and support. The feeding roller 33 is mounted on the lower surface of the lifting base plate 32, and its surface is specially designed with protrusions or dots to increase friction and prevent the wooden board from slipping during processing. By precisely controlling the rotational speed of the feeding roller 33, the forward speed of the wooden board can be accurately adjusted; and by controlling the operating state of the pressure servo motor 31, the pressure on the wooden board can be flexibly adjusted, ensuring smooth sanding and high-quality processing. The outer cover 34 is located on the outer periphery of the lifting base plate 32, through which the pressure servo motor 31 connects to the lifting base plate 32. The outer cover 34 prevents dust leakage.

[0035] The working process of the 100 sander is as follows:

[0036] The wooden board is fed into the sander 100. The feeding control unit 30 is activated, and the pressure servo motor 31 controls the lifting base plate 32 to descend, bringing the feeding roller 33 into contact with the wooden board. The forward speed of the wooden board is controlled by adjusting the rotation speed of the feeding roller 33, while the pressure servo motor 31 adjusts the pressure on the wooden board to ensure stability and suitable sanding. The sanding belt drive unit 10 starts working, and the two drive rollers 11 drive the sanding belt 13 to rotate, driving the sandpaper to perform sanding on the wooden board. During this process, the tension roller 12 adjusts the tension of the sanding belt 13 as needed to ensure the fit between the sanding belt 13 and the wooden board and the sanding effect.

[0037] As the sanding belt 13 generates heat during prolonged operation, the heat exchange component 14 begins to function. The thermal sensor monitors the temperature of the sanding belt 13 in real time. If the temperature rises, the heat exchange tubes 142, evenly distributed on the three sides of the triangle on the heat-conducting base 141, will cool the sanding belt 13 in a circumferential manner, ensuring that the sanding belt 13 operates within a suitable temperature range and guaranteeing the stability of the sanding effect.

[0038] Dust, sawdust, and other impurities generated during sanding are collected by the dust collection unit 20. The conical opening of the dust collection hopper 21 faces the sanding belt drive unit 10. The negative pressure fan 22 is activated to draw air into the dust collection hopper 21, sucking in dust, sawdust, and other impurities. Simultaneously, the tapered suction pipe 23 is located directly below the tension roller shaft 12. Its gradually narrowing nozzle creates high-pressure suction, with the suction volume accounting for half that of the negative pressure fan 22. This effectively adsorbs impurities on and around the sanding belt 13, and its smooth side design does not affect the suction effect of the negative pressure fan 22 on the upper surface. The collected impurities are discharged to the main pipeline in the factory through the negative pressure fan 22. The entire sanding process continues until the wood board reaches the required sanding quality and is then sent out of the sander 100.

[0039] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0041] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A dust-free sander, characterized in that, include: The sanding belt drive unit comprises two parallel drive rollers, a vertically adjustable tension roller, and a sanding belt forming a triangular structure around the three components. The dust removal integrated unit includes a dust collection hopper, a negative pressure fan connected to the conical opening of the dust collection hopper, and a tapered adsorption tube with one end connected to the negative pressure fan and the inlet facing the tension roller shaft. The feeding control unit is located above the worktable and includes a pressure servo motor, a lifting base plate installed at the output end of the pressure servo motor, and a feeding pressure roller with anti-slip texture located at the bottom of the lifting base plate. The tension roller shaft is used to extend the sanding belt outward along the curved surface to increase the gap, so that the tapered adsorption tube can peel off impurities from the sanding belt surface through local high-pressure airflow. The feeding roller adjusts the workpiece feed speed by rotating its rotation speed and dynamically controls the workpiece pressing force by the pressure servo motor.

2. The sander according to claim 1, characterized in that, The sanding belt drive unit further includes a heat exchange component, which includes a heat-conducting base that matches the contour of the triangular frame, and a heat exchange pipeline array that is distributed along the three sides of the triangle and cools and dissipates heat from the sanding belt.

3. The sander according to claim 1, characterized in that, The inlet section of the tapered adsorption tube features a gradually decreasing cross-section design and its air volume accounts for 50% of the total air volume of the negative pressure fan.

4. The sander according to claim 1, characterized in that, The sidewall of the tapered adsorption tube is designed with a smooth flow channel of equal cross-section to prevent airflow disturbance from affecting the dust collection hopper's efficiency in capturing impurities in the sanding area.

5. The sander according to claim 1, characterized in that, The dust collection hoppers are spaced apart directly below the sanding belt drive unit, with their conical dust collection ports facing the sanding work surface to receive waste. The outlet of the negative pressure fan is connected to the central dust removal pipe.

6. The sander according to claim 2, characterized in that, In the triangular frame, the two drive rollers are located on the worktable plane, and the tension roller is suspended on the lower side of the worktable, forming the apex of an isosceles triangle with an included angle of 45 degrees.

7. The sander according to claim 6, characterized in that, In the triangular frame, the top surface of the heat-conducting base is flush with the workbench surface, ensuring that the heat exchange component does not interfere with the sanding work space.

8. The sander according to claim 1, characterized in that, The anti-slip texture on the surface of the feeding roller is a hemispherical protrusion or a spiral ridge structure, which is used to eliminate relative displacement of the workpiece.

9. The sander according to claim 1, characterized in that, The negative pressure fan synchronously drives the negative pressure collection function of the dust collection hopper and the directional cleaning function of the tapered adsorption tube, and the tapered adsorption tube independently removes the accumulated impurities in the tension roller area.

10. The sander according to claim 1, characterized in that, The tapered adsorption tube is provided with multiple partition plates inside to form multiple sub-channels inside the tube.

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