A wood product sanding system

Abstract

The invention relates to the technical field of wood product processing, and discloses a wood product sanding and polishing system, which comprises a conveyor belt for conveying wood products, on which a sandblaster, a DuPont wire fine sanding machine, a disc sanding machine, a roller sanding machine and at least one sisal roller dust collector are sequentially arranged. The coarse sand of the sandblaster ensures the matte effect of the surface of the wood product and can sand the dark side of the workpiece. The DuPont wire fine sanding machine can clean the dark side of the workpiece twice, and at the same time, throw out the sand grains embedded in the surface of the workpiece and cover the sand marks left by the sandblasting. The disc sanding machine and the roller sanding machine can cover the sand marks of the DuPont wire by sand throwing, so that the workpiece has a hand feel and the workpiece meets the surface roughness requirements of the next process. The sisal roller dust collector removes dust, and uses an atomizing spray gun to wet the sisal roller wire for dust removal, so that the sisal roller is kept moist, and a combined dust suction device and a hot air drying device respectively absorb the dust remaining on the surface of the workpiece and blow dry the residual moisture on the surface of the workpiece, so that the workpiece meets the requirements of topcoat spraying.

Description

Technical Field

[0001] The invention relates to the technical field of wood product processing, in particular to a wood product sanding and polishing system. Background Art

[0002] In the woodworking industry, wood products often need to be sanded, polished or polished to meet the requirements of topcoat spraying. Traditional wood product processing usually only uses a single process of sanding, polishing or polishing, and the effect of sanding, polishing or polishing is not good. There is no more systematic and effective sanding and polishing equipment, and the dust after sanding, polishing or polishing is not easy to clean. Therefore, the existing technology needs to be improved. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a wood product sanding and polishing system. In the system of the present invention, the wood products are sequentially sanded by a sandblasting machine, finely sanded by a DuPont wire fine sand machine, sanded by a disc sander, sanded by a roller sander, and finally dusted by a sisal roller dust collector.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A wood product sanding system, the system comprises a conveyor belt for conveying wood products, wherein a sandblasting machine, a DuPont wire fine sanding machine, a disc sanding machine, a roller sanding machine and at least one sisal roller dust collector are sequentially arranged on the conveyor belt;

[0006] The sandblasting machine is a reciprocating sandblasting machine or a rotary sandblasting machine;

[0007] The DuPont wire fine sand machine comprises a first body, the first body comprises a first driven roller arranged between the conveyor belts, a DuPont wire roller and a first motor for driving the DuPont wire roller to rotate, the first driven roller and the central axis of the DuPont wire roller are on the same vertical line, and the DuPont wire roller can move up and down;

[0008] The disc sanding machine comprises a second body, the second body comprises a plurality of sanding discs arranged above the conveyor belt, and a disc rotating motor for driving the sanding discs to rotate, wherein the plurality of sanding discs can reciprocate in a direction perpendicular to the advancing direction of the wood product;

[0009] The roller sander comprises a third body, the third body comprises a plurality of sanding belt rollers arranged above the conveyor belt and parallel to the advancing direction of the wood product, and a roller rotating motor for driving the sanding belt rollers to rotate, and the plurality of sanding belt rollers can reciprocate in a direction perpendicular to the advancing direction of the wood product;

[0010] The sisal roller dust collector includes a fourth body, which includes a second driven roller arranged between the conveyor belts, a sisal roller and a second motor for driving the sisal roller to rotate, the second driven roller and the central axis of the sisal roller are on the same vertical line, and the sisal roller can move up and down.

[0011] Preferably, the conveyor belt is divided into a first conveyor belt and a second conveyor belt, the first conveyor belt is arranged on a sandblasting machine, and the second conveyor belt is arranged on a DuPont wire fine sand machine, a disc sand machine, a roller sand machine and a sisal roller dust collector.

[0012] Preferably, there are two sisal roller dust collectors, each of which is provided with an atomizing spray gun, a dust suction device and a hot air drying device. The atomizing spray gun is aimed at the sisal roller to spray so as to keep it moist.

[0013] Preferably, the inlet and outlet of the sandblasting machine, Dupont wire fine sand machine, disc sand machine, roller sand machine and sisal roller dust removal machine are provided with a pressing roller. The setting of the pressing roller can make the wood products evenly stressed and not displaced during the processing.

[0014] Preferably, the rotation direction of the DuPont wire roller and the sisal roller in the DuPont wire fine sand machine and the sisal roller dust remover is opposite to the forward direction of the wooden product.

[0015] Preferably, the sand trays are twelve in number and arranged in a matrix, with two columns arranged along the advancing direction of the wood product and six rows arranged along the direction perpendicular to the advancing direction of the wood product. The sand trays may also not be arranged in a matrix, and the two columns of sand trays may be arranged alternately.

[0016] Preferably, the reciprocating sandblasting machine includes a reciprocating sandgun group arranged above the conveyor belt, and a reciprocating mechanism for driving the reciprocating sandgun group to reciprocate in a direction perpendicular to the advancing direction of the wooden product; the reciprocating sandgun group includes a plurality of sandguns; the reciprocating mechanism includes a crossbeam for fixing the reciprocating sandgun group, two sliders fixed to the reciprocating sandblasting machine and perpendicular to the advancing direction of the wooden product, two slide rails respectively slidably connected to the two sliders, and a driving mechanism for driving the slide rails and the sliders to reciprocate relative to each other; the two slide rails are respectively fixed at both ends of the crossbeam.

[0017] Preferably, the reciprocating sand gun group comprises two rows of sand guns arranged alternately, with 8 sand guns in each row.

[0018] Preferably, the rotary sandblasting machine includes a sand storage hopper and a rotary sandblasting mechanism arranged above the conveyor belt; the rotary sandblasting mechanism is a rotary sandblasting head or two rotary sandblasting heads with opposite rotation directions arranged along the forward direction of the wooden product; the rotary sandblasting head is provided with a plurality of sand guns, and the plurality of sand guns are evenly surrounded by a circle or a plurality of concentric circles; the sand storage hopper is used to supply sand to the sand guns.

[0019] Preferably, the plurality of sand guns are evenly arranged to form two concentric circles; and the sand guns on the two concentric circles are staggered.

[0020] Preferably, the rotary sandblasting machine head comprises a hollow sand tube whose upper end is connected to a sand storage hopper, a sand outlet head arranged at the lower end of the hollow sand tube, a plurality of sand outlets arranged on the side wall of the sand outlet head, an air supply chamber fixed to the rotary sandblasting machine and rotatably connected to the hollow sand tube, a first air supply port and a plurality of second air supply ports arranged on the side wall of the hollow sand tube, an air supply channel for connecting the first air supply port with the second air supply port, a plurality of sand guns fixed to the hollow sand tube and a driving mechanism for driving the hollow sand tube to rotate; the air supply chamber is connected to the air supply channel through the first air supply port; each sand gun is provided with a nozzle, a sand inlet and an air inlet; the sand inlet of each sand gun is connected to a sand outlet through a sand tube; the air inlet of each sand gun is connected to a second air supply port through an air pipe.

[0021] Preferably, the rotary sandblasting machine head comprises an inner air pipe whose upper end is connected to an air supply mechanism, an outer air pipe whose upper end is rotatably arranged outside the inner air pipe and connected to the inner air pipe, a plurality of air outlets arranged at the lower end of the outer air pipe, a rotating sand hopper fixed to the outer air pipe and connected to a sand storage hopper, a plurality of sand outlet holes arranged at the bottom of the rotating sand hopper, a plurality of sand guns fixed to the outer air pipe and a driving mechanism for driving the outer air pipe to rotate; each sand gun is provided with a nozzle, a sand inlet and an air inlet; the sand inlet of each sand gun is connected to a sand outlet hole through a sand pipe; the air inlet of each sand gun is connected to an air outlet hole through an air pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the system of the present invention, the wooden products are sequentially subjected to coarse sanding by a sandblasting machine, fine sanding by a Dupont wire fine sanding machine, sand blasting by a disc sanding machine, sand blasting by a roller sanding machine, and finally dust removal by a sisal roller dust removal machine.

[0024] Among them, when the sandblasting machine is coarse sanding, the reciprocating mechanism drives the reciprocating sand gun group to sandblast and polish the wood products, or the rotating sandblasting mechanism is used to sandblast and polish the wood products. The sandblasting is more uniform, ensuring the matte effect on the surface of the wood products. Moreover, the sandblasting machine can sand the negative side of the workpiece (the place where the existing special-shaped sand cannot sand in place), so that the negative side of the workpiece also achieves a good matte effect.

[0025] The DuPont wire fine sand machine can clean the negative surface of the workpiece twice through the DuPont wire roller, and at the same time, throw out the sand particles embedded in the surface of the workpiece and cover the sand marks left by sandblasting.

[0026] Sand blasting with a disc sander and a roller sander can cover the sand marks of the Dupont wire, giving the workpiece a feel and allowing it to meet the surface roughness requirements of the next process.

[0027] The sisal roller dust collector removes dust and uses an atomizing spray gun to wet the sisal roller wire for dust removal to keep the sisal roller moist. The combined dust suction device and hot air drying device respectively absorb the residual dust on the workpiece surface and blow dry the residual moisture on the workpiece surface, so that the workpiece meets the requirements of topcoat spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a wood product sanding and polishing system of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the reciprocating sandblasting machine in the present invention;

[0030] Figure 3 yes Figure 2 An enlarged view of the middle part A;

[0031] Figure 4 It is a structural schematic diagram of a rotary sandblasting machine (single head) in the present invention;

[0032] Figure 5 It is a structural schematic diagram of a rotary sandblasting machine (dual heads) in the present invention;

[0033] Figure 6 It is a schematic cross-sectional structure diagram of a rotary sandblasting machine head of a rotary sandblasting machine in the present invention;

[0034] Figure 7 yes Figure 6 An enlarged view of the middle part B;

[0035] Figure 8 yes Figure 6 An enlarged view of the middle component C;

[0036] Fig. 9 is another cross-sectional structural schematic diagram of a rotary sandblasting machine head of the rotary sandblasting machine of the present invention;

[0037] Fig.10 It is a side view of the Dupont wire fine sand machine, the disc sand machine, the roller sand machine and the sisal roller dust collector in the present invention;

[0038] Fig.11 It is a top view of the Dupont wire fine sand machine, the disc sand machine, the roller sand machine and the sisal roller dust collector in the present invention;

[0039] Fig.12 yes Fig.11 Schematic diagram of the cross-section structure along AA;

[0040] Fig.13 yes Fig.11 Schematic diagram of the cross-sectional structure along BB;

[0041] Fig.14 yes Fig.11Schematic diagram of the cross-sectional structure along CC;

[0042] Fig.15 yes Fig.11 Schematic diagram of the cross-section structure along DD;

[0043] Fig.16 yes Fig.11 Schematic diagram of the cross-sectional structure along EE. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with specific embodiments.

[0045] See also Figure 1-16 A wood product sanding system, the system includes a conveyor belt for conveying wood products, on which a sandblasting machine 1, a DuPont wire fine sanding machine 2, a disc sanding machine 3, a roller sanding machine 4 and at least one sisal roller dust collector 5 are arranged in sequence. The conveyor belt can be integral or segmented, such as divided into two sections: a first conveyor belt 61 and a second conveyor belt 62. In this embodiment, the first conveyor belt 61 is arranged on the sandblasting machine 1, and the second conveyor belt 62 is arranged on the DuPont wire fine sanding machine 2, the disc sanding machine 3, the roller sanding machine 4 and the sisal roller dust collector 5. The first conveyor belt 61 and the second conveyor belt 62 are close to each other and can be automatically connected to convey wood products, such as wooden boards.

[0046] The sandblasting machine 1 may be a reciprocating sandblasting machine or a rotary sandblasting machine.

[0047] like Figure 2 and Figure 3 As shown, the reciprocating sandblasting machine includes a reciprocating sand gun group 101 arranged above the first conveyor belt 61, a reciprocating mechanism for driving the reciprocating sand gun group 101 to reciprocate in a direction perpendicular to the advancing direction of the wood product; the reciprocating sand gun group 101 includes a plurality of sand guns 102; the reciprocating mechanism includes a crossbeam 103 for fixing the reciprocating sand gun group 101, two sliders 104 fixed to the reciprocating sand blasting machine and perpendicular to the advancing direction of the wood product, two slide rails 105 respectively connected to the two sliders 104 in a sliding manner, and a driving mechanism (not indicated) for driving the slide rails 105 and the sliders 104 to reciprocate relative to each other; the two slide rails 105 are respectively fixed at both ends of the crossbeam 103. The driving mechanism can be a cylinder, etc. The reciprocating sand gun group 101 includes two rows of sand guns 102 arranged in an alternating manner, with 8 sand guns in each row. The sand supply hopper 106 is used to supply sand to the sand guns 102.

[0048] like Figure 4-5As shown, the rotary sandblasting machine includes a sand storage hopper 702 and a rotary sandblasting mechanism arranged above the first conveyor belt 61. The rotary sandblasting mechanism is a rotary sandblasting head 7 or two rotary sandblasting heads 7 arranged along the advancing direction of the wooden product and rotating in opposite directions. The rotary sandblasting head 7 is provided with a plurality of sand guns 701, and the plurality of sand guns 701 are evenly surrounded by a circle or a plurality of concentric circles. In this embodiment, preferably, the plurality of sand guns 701 are evenly surrounded by two concentric circles; the sand guns on the two concentric circles are staggered. The sand storage hopper 702 is used to supply sand to the sand guns 701.

[0049] As one of the preferred embodiments of the present invention: Figure 6-8 As shown, the rotary sandblasting machine head 7 includes a hollow sand tube 703 whose upper end is connected to the sand storage hopper 702, a sand outlet head 704 arranged at the lower end of the hollow sand tube 703, a plurality of sand outlets 705 arranged on the side wall of the sand outlet head 704, an air supply chamber 706 fixed to the rotary sandblasting machine and rotatably connected to the hollow sand tube 703, a first air supply port 707 and a plurality of second air supply ports 708 arranged on the side wall of the hollow sand tube 703, an air supply channel 710 for connecting the first air supply port 707 and the second air supply port 709, a plurality of sand guns 711 fixed to the hollow sand tube 703, and a driving mechanism 712 for driving the hollow sand tube 703 to rotate. The driving mechanism 712 is a driving motor, and the driving motor drives the hollow sand tube 703 to rotate through a belt 713. The air supply chamber 706 is connected to the air supply channel 710 through the first air supply port 707. Each sand gun 711 is provided with a nozzle 714, a sand inlet 715 and an air inlet 716. The sand inlet 715 of each sand gun 711 is connected to a sand outlet 704 through a sand pipe 717; the air inlet 716 of each sand gun 711 is connected to a second air supply port 708 through an air pipe 718.

[0050] The air supply chamber 706 can be connected to the hollow sand tube 703 through components such as a slip ring 720 .

[0051] The outer wall of the hollow sand tube 703 in contact with the air supply chamber 706 is provided with an annular groove 719, and the first air supply port 707 is arranged at the bottom of the annular groove, and the number is at least one. The upper end of the air supply channel 710 is connected to the first air supply port 707, and the number is consistent with the first air supply port 707. The second air supply port 708 is opened on the outer wall of the hollow sand tube 703, and an annular air channel 721 connected to the second air supply port 16 is opened in the side wall of the hollow sand tube 703. The inner wall of the hollow sand tube 703 is provided with an air connection port 722, and the air connection port 722 is connected to the lower end of the air supply channel 710, and the number is consistent with the number of the air supply channel 710. In this embodiment, the number of the first air supply port 707, the air supply channel 710 and the air connection port 722 is five. The air supply channel 710 can be directly welded to the inner wall of the hollow sand tube 703 and rotated therewith.

[0052] As the second preferred solution of the present invention: Fig. 9As shown, the rotary sandblasting machine head includes an inner air pipe 723 whose upper end is connected to an air supply mechanism (not indicated, any air supply mechanism in the prior art may be used), an outer air pipe 724 whose upper end is rotatably arranged outside the inner air pipe 723 and connected to the inner air pipe 723, a plurality of air outlet holes 725 arranged at the lower end of the outer air pipe 724, a rotating sand bucket 726 fixed to the outer air pipe 724 and connected to the sand storage bucket 702, a plurality of sand outlet holes 727 arranged at the bottom of the rotating sand bucket 726, a plurality of sand guns 728 fixed to the outer air pipe 724, and a driving mechanism 729 for driving the outer air pipe 724 to rotate. The driving mechanism 729 is a driving motor, which drives the outer air pipe 724 to rotate through a belt 730. Each sand gun 728 is provided with a nozzle 731, a sand inlet 732 and an air inlet 733. The sand inlet 732 of each sand gun 728 is connected to a sand outlet hole 727 through a sand pipe 734 ; the air inlet 733 of each sand gun 728 is connected to an air outlet hole 725 through an air pipe 735 .

[0053] like Figure 10-13 As shown, the DuPont wire fine sand machine 2 includes a first body 21, the first body 21 includes a first driven roller 22, a DuPont wire roller 23 and a first motor 24 for driving the DuPont wire roller 23 to rotate, the first driven roller 22 and the central axis of the DuPont wire roller 23 are on the same vertical line, and the DuPont wire roller 23 can move up and down (can be driven by a cylinder, etc.). The speed and downward distance of the DuPont wire roller 23 can be adjusted during use.

[0054] like Figure 10-12 As shown in FIG. 14 , the disc sanding machine 3 includes a second body 31, and the second body 31 includes a plurality of sand discs 32 arranged above the second conveyor belt 62, and a disc rotating motor 33 for driving the sand discs 32 to rotate. The plurality of sand discs 32 can reciprocate in a direction perpendicular to the advancing direction of the wood product (this can be achieved by a swing motor 34 or other mechanism. The reciprocating motion achieved by a swing motor is a prior art and will not be described in detail here). The disc rotating motor 33 drives the first shaft 35 to rotate through a belt, and each sand disc 32 is provided with a sand disc rotating shaft 36. The first shaft 35 drives a sand disc rotating shaft 36 through a belt 37, and the adjacent sand disc rotating shafts 36 are driven by belts, so that the disc rotating motor 33 drives all sand discs 32 to rotate.

[0055] There are twelve sand trays 32 arranged in a matrix, with two columns arranged along the advancing direction of the wood product and six rows arranged along the direction perpendicular to the advancing direction of the wood product. The sand trays may not be arranged in a matrix, and the two columns of sand trays may be arranged alternately.

[0056] like Figure 10-12As shown in Figure 15, the roller sander 4 includes a third body 41, the third body 41 includes a plurality of sanding belt rollers 42 arranged above the second conveyor belt 62 and parallel to the advancing direction of the wood product, and a roller rotating motor 43 for driving the sanding belt rollers 42 to rotate. The plurality of sanding belt rollers 42 can reciprocate in a direction perpendicular to the advancing direction of the wood product (this can be achieved by a swing motor 44 or other mechanism. The reciprocating motion achieved by a swing motor is a prior art and will not be elaborated here).

[0057] like Figure 10-12 As shown in Figures 16, the sisal roller dust remover 5 includes a fourth body 51, which includes a second driven roller 52, a sisal roller 53 and a second motor 54 for driving the sisal roller 53 to rotate, and the second driven roller 52 and the central axis of the sisal roller 53 are on the same vertical line, and the sisal roller 53 can move up and down (can be driven by a cylinder, etc.).

[0058] In this embodiment, there are two sisal roller dust removers 5, and the sisal roller dust removers 5 are provided with an atomizing spray gun, a dust suction device and a hot air drying device. The atomizing spray gun is aimed at the sisal roller to spray so as to keep it moist.

[0059] The inlet and outlet of the sandblasting machine 1, the Dupont wire fine sand machine 2, the disc sand machine 3, the roller sand machine 4 and the sisal roller dust collector 5 are provided with a pressing roller 8. The setting of the pressing roller 8 can make the wood product evenly stressed and not displaced during the processing.

[0060] The rotation direction of the DuPont wire roller 23 and the sisal roller in the DuPont wire fine sand machine 2 and the sisal roller dust collector 5 is opposite to the forward direction of the wood product.

[0061] In the system of the present invention, the wooden products are sequentially subjected to coarse sanding by a sandblasting machine, fine sanding by a Dupont wire fine sanding machine, sand blasting by a disc sanding machine, sand blasting by a roller sanding machine, and finally dust removal by a sisal roller dust removal machine.

[0062] Among them, when the sandblasting machine is coarse sanding, the reciprocating mechanism drives the reciprocating sand gun group to sandblast and polish the wood products, or the rotating sandblasting mechanism is used to sandblast and polish the wood products. The sandblasting is more uniform, ensuring the matte effect on the surface of the wood products. Moreover, the sandblasting machine can sand the negative side of the workpiece (the place where the existing special-shaped sand cannot sand in place), so that the negative side of the workpiece also achieves a good matte effect.

[0063] The DuPont wire fine sand machine can clean the negative surface of the workpiece twice through the DuPont wire roller, and at the same time, throw out the sand particles embedded in the surface of the workpiece and cover the sand marks left by sandblasting.

[0064] Sand blasting with a disc sander and a roller sander can cover the sand marks of the Dupont wire, giving the workpiece a feel and allowing it to meet the surface roughness requirements of the next process.

[0065] The sisal roller dust collector removes dust and uses an atomizing spray gun to wet the sisal roller wire for dust removal to keep the sisal roller moist. The combined dust suction device and hot air drying device respectively absorb the residual dust on the workpiece surface and blow dry the residual moisture on the workpiece surface, so that the workpiece meets the requirements of topcoat spraying.

[0066] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A wood product sanding system, characterized in that: The system comprises a conveyor belt for conveying wood products, on which a sandblasting machine, a Dupont wire fine sanding machine, a disc sanding machine, a roller sanding machine and at least one sisal roller dust collector are sequentially arranged; The sandblasting machine is a reciprocating sandblasting machine or a rotary sandblasting machine; The DuPont wire fine sand machine comprises a first body, the first body comprises a first driven roller arranged between the conveyor belts, a DuPont wire roller and a first motor for driving the DuPont wire roller to rotate, the first driven roller and the central axis of the DuPont wire roller are on the same vertical line, and the DuPont wire roller can move up and down; The disc sanding machine comprises a second body, the second body comprises a plurality of sanding discs arranged above the conveyor belt, and a disc rotating motor for driving the sanding discs to rotate, wherein the plurality of sanding discs can reciprocate in a direction perpendicular to the advancing direction of the wood product; The roller sander comprises a third body, the third body comprises a plurality of sanding belt rollers arranged above the conveyor belt and parallel to the advancing direction of the wood product, and a roller rotating motor for driving the sanding belt rollers to rotate, and the plurality of sanding belt rollers can reciprocate in a direction perpendicular to the advancing direction of the wood product; The sisal roller dust collector comprises a fourth body, which comprises a second driven roller, a sisal roller and a second motor for driving the sisal roller to rotate, arranged between the conveyor belts, the second driven roller and the central axis of the sisal roller are on the same vertical line, and the sisal roller can move up and down; there are two sisal roller dust collectors, and the sisal roller dust collectors are provided with an atomizing spray gun, a dust suction device and a hot air drying device, and the atomizing spray gun is aimed at the sisal roller to spray to keep it moist; The conveyor belt is divided into a first conveyor belt and a second conveyor belt, the first conveyor belt is arranged on a sandblasting machine, and the second conveyor belt is arranged on a DuPont wire fine sand machine, a disc sand machine, a roller sand machine and a sisal roller dust removal machine; The inlet and outlet of the sandblasting machine, Dupont wire fine sand machine, disc sand machine, roller sand machine and sisal roller dust collector are provided with pressing rollers; The rotation direction of the DuPont wire roller and the sisal roller in the DuPont wire fine sand machine and the sisal roller dust removal machine is opposite to the forward direction of the wooden product; There are twelve sand trays arranged in a matrix, with two columns arranged along the advancing direction of the wooden product and six rows arranged along a direction perpendicular to the advancing direction of the wooden product.

2. A wood product sanding system according to claim 1, characterized in that: The reciprocating sandblasting machine includes a reciprocating sand gun group arranged above the conveyor belt, and a reciprocating mechanism for driving the reciprocating sand gun group to reciprocate in a direction perpendicular to the advancing direction of the wooden product; the reciprocating sand gun group includes a plurality of sand guns; the reciprocating mechanism includes a crossbeam for fixing the reciprocating sand gun group, two sliders fixed to the reciprocating sandblasting machine and perpendicular to the advancing direction of the wooden product, two slide rails respectively connected to the two sliders in a sliding manner, and a driving mechanism for driving the slide rails and the sliders to reciprocate relative to each other; the two slide rails are respectively fixed at both ends of the crossbeam.

3. A wood product sanding system according to claim 1, characterized in that: The rotary sandblasting machine comprises a sand storage hopper and a rotary sandblasting mechanism arranged above the conveyor belt; the rotary sandblasting mechanism is a rotary sandblasting head or two rotary sandblasting heads with opposite rotation directions arranged along the forward direction of the wooden product; the rotary sandblasting head is provided with a plurality of sand guns, and the plurality of sand guns evenly surround a circle or a plurality of concentric circles; the sand storage hopper is used to supply sand to the sand guns.

4. A wood product sanding system according to claim 3, characterized in that: The rotary sandblasting machine head comprises a hollow sand tube whose upper end is connected with a sand storage hopper, a sand outlet head arranged at the lower end of the hollow sand tube, a plurality of sand outlets arranged on the side wall of the sand outlet head, an air supply chamber fixed to the rotary sandblasting machine and rotatably connected with the hollow sand tube, a first air supply port and a plurality of second air supply ports arranged on the side wall of the hollow sand tube, an air supply channel for connecting the first air supply port with the second air supply port, a plurality of sand guns fixed to the hollow sand tube and a driving mechanism for driving the hollow sand tube to rotate; the air supply chamber is connected with the air supply channel through the first air supply port; each sand gun is provided with a nozzle, a sand inlet and an air inlet; the sand inlet of each sand gun is connected with a sand outlet through a sand tube; the air inlet of each sand gun is connected with a second air supply port through an air pipe.

5. The wood product sanding system according to claim 3, characterized in that: The rotary sandblasting machine head comprises an inner air pipe whose upper end is connected with an air supply mechanism, an outer air pipe whose upper end is rotatably arranged outside the inner air pipe and connected with the inner air pipe, a plurality of air outlets arranged at the lower end of the outer air pipe, a rotating sand bucket fixed to the outer air pipe and connected with a sand storage bucket, a plurality of sand outlet holes arranged at the bottom of the rotating sand bucket, a plurality of sand guns fixed to the outer air pipe and a driving mechanism for driving the outer air pipe to rotate; each sand gun is provided with a nozzle, a sand inlet and an air inlet; the sand inlet of each sand gun is connected with a sand outlet hole through a sand pipe; the air inlet of each sand gun is connected with an air outlet hole through an air pipe.

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