An automatic bark peeling machine for sandalwood

Abstract

This invention provides an automatic bark peeling machine for *Pterocarya stenoptera*, capable of peeling bark from *Pterocarya stenoptera* trees of different diameters while preserving the integrity of the bark to the maximum extent. The machine includes a conveying module, a first extrusion module, a second extrusion module, and a peeling module. Conveying modules are located at both the front and rear ends of the peeling module. The first extrusion module is positioned above the conveying module at the front end of the peeling module, and the second extrusion module is positioned above the conveying module at the rear end of the peeling module. The conveying modules drive the *Pterocarya stenoptera* trees to move axially. The first and second extrusion modules press the *Pterocarya stenoptera* trees firmly onto the conveying rollers. The peeling module includes a slicing module and a tearing module. When the *Pterocarya stenoptera* trees move axially, each slicing blade cuts a slit parallel to the axial direction of the tree, with the depth of the slit in the radial direction not less than the thickness of the bark. When the bark is divided into strips and moves axially from front to back, the blade of each slicing blade cuts into the end of the bark.

Description

Technical Field

[0001] This invention relates to the field of peeling bark from *Pterocarya stenoptera*, and specifically to an automatic peeling machine for *Pterocarya stenoptera*. Background Technology

[0002] Xuan paper made from the bark of the Qingtan tree is highly absorbent, resistant to deformation, anti-aging, insect-proof, and has a long lifespan. It possesses six key characteristics: thinness, lightness, softness, toughness, fineness, and whiteness. This allows calligraphers and painters to achieve variations in ink density and enhances the paper's unique style. From the Ming Dynasty onwards, calligraphy, paintings, and historical documents written, printed, or copied on Xuan paper have remained intact and have been passed down to this day. Therefore, Xuan paper is renowned both domestically and internationally for its "thousand-year lifespan and ever-changing ink effects," all of which is inseparable from the fact that its main raw material is the bark of the Qingtan tree.

[0003] Traditional methods of peeling the bark of *Pterocarya stenoptera* (green sandalwood) rely primarily on manual labor. This method is inefficient, labor-intensive, and causes significant damage to hands and skin. If the bark is not peeled promptly, it affects the quality of Xuan paper, leading to resource waste. Furthermore, manual peeling makes it difficult to guarantee a high rate of bark removal and low breakage, and during peak harvest season, manpower is scarce and costs are high. The invention of the *Pterocarya stenoptera* peeling machine significantly improves peeling efficiency, reduces labor intensity, and lessens reliance on manual labor. Mechanized peeling ensures a high rate of bark removal and low breakage, improving the quality of the bark and thus enhancing the quality of Xuan paper. In addition, the peeling machine can operate around the clock, greatly increasing production efficiency and reducing production costs. Summary of the Invention

[0004] This invention provides an automatic bark peeling machine for sandalwood, which can peel sandalwood of different diameters while preserving the integrity of the bark to the maximum extent.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automatic peeling machine for *Pterocarya stenoptera* includes a conveying module, a first extrusion module, a second extrusion module, and a peeling module. Conveying modules are provided at both the front and rear ends of the peeling module. The first extrusion module is located above the conveying module at the front end of the peeling module, and the second extrusion module is located above the conveying module at the rear end of the peeling module.

[0007] The conveying module includes a base and multiple conveying rollers rotatably mounted on the base. The conveying rollers rotate under the drive of the transmission mechanism to move the green sandalwood along the axial direction.

[0008] The No. 1 extrusion module and the No. 2 extrusion module are used to press the green sandalwood onto the conveying rollers in the conveying modules located at the front and rear ends of the peeling module, respectively.

[0009] The peeling module includes a slicing module, a tearing module, and a No. 3 frame.

[0010] The slicing module includes a first cutter head 31, a second hydraulic cylinder 32, and slicing blades 33. The first cutter head is fixedly installed at the front end of the third frame. The cylinder bodies of multiple second hydraulic cylinders are installed on the inner side of the first cutter head. Each slicing blade is fixedly installed on the piston rod of a second hydraulic cylinder. The multiple slicing blades are arranged around the circumference of the *Pterocarya stenoptera*. When the *Pterocarya stenoptera* moves axially, each slicing blade cuts a slit parallel to the axial direction of the *Pterocarya stenoptera*. The depth of the slit in the radial direction of the *Pterocarya stenoptera* is not less than the thickness of the *Pterocarya stenoptera* bark. The multiple slits divide the *Pterocarya stenoptera* bark into multiple strips.

[0011] The tearing module includes a second cutter head 61, a third hydraulic cylinder 63, a cutter 69, an upper clamping plate 67, and a fourth hydraulic cylinder 65. Multiple cutters are arranged circumferentially around the purslane. Each cutter 69 includes a blade body 691 and a cutting edge 692 extending chordally along the purslane. The second cutter head is mounted at the rear end of the third frame. The cylinder bodies of the multiple third hydraulic cylinders are mounted on the second cutter head. The blade body of each cutter is directly or indirectly connected to the piston rod of the third hydraulic cylinder. The third hydraulic cylinder is used to drive the cutter to move radially along the purslane. The two ends of the fourth hydraulic cylinder are hinged to the blade body and the front of the upper clamping plate, respectively, and the rear of the upper clamping plate is hinged to the blade body. In the radial direction of the purslane, the cutting edge is closer to the center of the purslane than the upper clamping plate.

[0012] The cutting blade 69 and the slicing blade 33 are arranged alternately around the circumference of the *Pterocarya stenoptera*.

[0013] As the bark strips of *Pterocarya stenoptera* move axially from front to back, the blade of each cutter cuts into the end of the bark strip and extends between the end of the bark strip and the trunk. Then, hydraulic cylinder number four actuates, causing the front of the upper clamping plate to flip downward, clamping the end of the bark strip between the blade and the upper clamping plate. Next, hydraulic cylinder number three moves the cutter and the upper clamping plate radially away from the bark, and the bark continues to move axially backward, gradually separating the bark strip from the trunk.

[0014] The aforementioned automatic peeling machine for *Pterocarya stenoptera* has two guide plates 62 symmetrically arranged on both sides of each cutter 69. The guide plates 62 are fixedly connected to the second cutter disc 61. The rear ends of the second connecting blocks 68 are fixed on both sides of the cutter body. The front end of the second connecting blocks 68 is connected to the cam follower 66. The cam follower 66 is slidably installed in the slots on the guide plates 62 that extend radially along the *Pterocarya stenoptera*. A baffle 64 is fixed between the rear ends of the two guide plates 62. A transition plate 693 extending rearward is fixed to the rear side of the cutter body. In the radial direction of the *Pterocarya stenoptera*, the transition plate is closer to the center of the *Pterocarya stenoptera* than the baffle. The transition plate is hinged to the piston rod of the third hydraulic cylinder 63.

[0015] When hydraulic cylinder 63 drives the transition plate, cutter 69, and connecting block 68 to move towards the center of the green sandalwood along the radial direction, the blade body swings backward relative to the guide plate 62 around the cam follower 66. When the rear side of the blade body contacts the front side of the baffle 64, the cutting edge extends in the axial direction parallel to the green sandalwood, while the cam follower 66 slides in the groove on the guide plate 62. When hydraulic cylinder 63 drives the transition plate, cutter 69, and connecting block 68 to move away from the center of the green sandalwood along the radial direction, the blade body swings forward relative to the guide plate 62 around the cam follower 66. The cutting edge extends in an inclined direction at a certain angle to the axial direction of the green sandalwood, while the cam follower 66 slides in the groove on the guide plate 62.

[0016] The aforementioned automatic bark peeling machine for *Pterocarya stenoptera* has an upper clamping plate whose front end extends forward beyond the blade in the axial direction, and the upper clamping plate and the blade are parallel in the axial direction of the *Pterocarya stenoptera*. When the bark strips of *Pterocarya stenoptera* move axially from front to back beyond the front end of the upper clamping plate 67 but before reaching the front end of the blade, the *Pterocarya stenoptera* stops moving. Then, hydraulic cylinder 63 drives the transition plate, the cutter 69, and the upper clamping plate 67 to move towards the center of the *Pterocarya stenoptera* along the radial direction. The blade body swings backward relative to the guide plate 62 around the cam follower 66, and the rear side of the blade body contacts the front side of the baffle 64 and slides relative to the baffle. When the upper clamping plate contacts the outer periphery of the *Pterocarya stenoptera*, hydraulic cylinder 63 stops. The action begins with the blade extending parallel to the axial direction of the *Pterocarya stenoptera*. Then, the *Pterocarya stenoptera* moves axially from front to back, and the blade cuts into the end of the *Pterocarya stenoptera*, gradually extending between the end of the strip of bark and the trunk. Then, hydraulic cylinder 65 actuates, causing the front of upper clamping plate 67 to flip downwards, clamping the end of the strip of bark between the blade and upper clamping plate 67. Next, hydraulic cylinder 63 drives the blade to move radially away from the *Pterocarya stenoptera*, and the blade body swings forward relative to guide plate 62 around cam follower 66. The blade extends at a certain angle to the axial direction of the *Pterocarya stenoptera*, and as the axial direction of the *Pterocarya stenoptera* moves, the strip of bark gradually separates from the trunk.

[0017] After the strip of bark is completely separated from the trunk, the pine tree stops moving axially. The fourth hydraulic cylinder 65 is activated, causing the front part of the upper clamping plate 67 to flip upward, releasing the end of the clamped strip of bark, which then falls freely.

[0018] The aforementioned automatic peeling machine for Chinese privet has a slicing blade 33 having a positioning part 331 extending parallel to the axial direction of the Chinese privet and a cutting tooth 332 extending in the radial direction of the Chinese privet.

[0019] In the axial direction of the purslane, the positioning part 331 is located in front of the cutting tooth 332; when the purslane moves from front to back along the axial direction beyond the front end of the positioning part 331 but before reaching the cutting tooth 332, the purslane stops moving. Then, the second hydraulic cylinder 32 drives the slicing knife 33 to move towards the center of the purslane along the radial direction. When the positioning part 331 contacts the outer periphery of the purslane, the second hydraulic cylinder 32 stops operating. When the purslane moves backward along the axial direction again, the cutting tooth 332 of each slicing knife cuts a slit parallel to the purslane axis on the purslane.

[0020] The aforementioned automatic peeling machine for Qingtan also includes a controller, and the peeling module also includes a blocking module 400, which is installed on the first cutter head 31 and / or the second cutter head 61.

[0021] The blocking module 400 includes a blocking post 41, a No. 5 hydraulic cylinder 43 that drives the blocking post 41 to move radially along the purslane, a mounting plate 42 that fixes the No. 5 hydraulic cylinder 43, and a sensor installed on the blocking post 41.

[0022] When the blocking module 400 is installed on the first cutter head 31, the mounting plate 42 is fixed on the first cutter head 31. The blocking post 41 is located behind the front end of the positioning part 331 and in front of the front end of the cutting tooth 332. When the green sandalwood moves axially from front to back and the end face of the green sandalwood exceeds the front end of the positioning part 331 but does not reach the cutting tooth 332, the end face of the green sandalwood contacts the blocking post 41. The blocking post 41 blocks the movement of the green sandalwood. The sensor is triggered to send a signal to the controller. The controller controls the conveying module to stop operating and the green sandalwood stops moving.

[0023] When the blocking module 400 is installed on the second cutter head 61, the mounting plate 42 is fixed on the second cutter head 61. The blocking post 41 is located behind the front end of the upper clamping plate 67 and in front of the front end of the blade 692. When the green sandalwood moves axially from front to back and the end face of the green sandalwood exceeds the front end of the upper clamping plate 67 but does not reach the front end of the blade 692, the end face of the green sandalwood contacts the blocking post 41. The blocking post 41 blocks the movement of the green sandalwood. The sensor is triggered to send a signal to the controller. The controller controls the conveying module to stop operating and the green sandalwood stops moving.

[0024] In the aforementioned automatic peeling machine for Chinese privet, the transmission mechanism in the conveying module is a chain drive mechanism. A single row of sprockets is fixed on the motor output shaft, and the conveying roller shaft is mounted on the base through a bearing seat. A double row of sprockets is fixed on the conveying roller shaft. The single row of sprockets is connected to one of the sprockets in the double row of sprockets by a chain, and the two sprockets in two adjacent double row of sprockets are connected by a chain.

[0025] The aforementioned automatic peeling machine for *Pterocarya stenoptera* includes a first extrusion module comprising a first frame, a first hydraulic cylinder, and a pressure roller 29. The cylinder body of the first hydraulic cylinder is mounted on the first frame, and the piston rod of the first hydraulic cylinder is hinged to the upper part of the lifting plate. The lifting plate is fixedly mounted on a slider, and the slider is slidably connected to a slide rail fixed on the first frame. The pressure roller 29 is mounted on the lower part of the lifting plate. When the first hydraulic cylinder is activated, it drives the slider, the lifting plate, and the pressure roller 29 to move downward, pressing the *Pterocarya stenoptera* onto the conveyor roller through the pressure roller.

[0026] The aforementioned automatic peeling machine for *Pterocarya stenoptera* includes a second extrusion module comprising a second frame 91, a linear bearing 92, a guide column 93, a conveyor roller mounting block 94, a ninth hydraulic cylinder 95, and a second pressure roller 99. The guide column 93 is slidably mounted on the second frame 91 via the linear bearing 92. The conveyor roller mounting block 94 is fixed to the lower end of the guide column 93. The second pressure roller 99 is rotatably mounted on the conveyor roller mounting block 94. The cylinder body of the ninth hydraulic cylinder 95 is mounted on the second frame. The piston rod of the ninth hydraulic cylinder 95 is connected to the conveyor roller mounting block 94. When the ninth hydraulic cylinder 95 is activated, it drives the conveyor roller mounting block 94 and the second pressure roller 99 to move downwards, pressing the *Pterocarya stenoptera* onto the conveyor roller via the second pressure roller 99.

[0027] The aforementioned automatic peeling machine for pine trees has a concave arc shape in the middle of the conveyor roller and is equipped with protruding conveyor teeth.

[0028] The aforementioned automatic peeling machine for *Pterocarya stenoptera* has an upper clamping plate 67 and a blade 692 with a certain curvature in the circumference of the *Pterocarya stenoptera*.

[0029] The beneficial effects of this invention are as follows:

[0030] This invention can peel the bark of 70-90mm thick sandalwood while preserving the integrity of the bark to the maximum extent. The peeling modules designed in this invention all have an adaptive fitting structure. In the slicing module, the bottom arc plate (positioning part) of the slicing blade is pressed down by the second hydraulic cylinder to fit the surface of the sandalwood. Under the action of the conveying module, the rear blade teeth cut into the sandalwood, ensuring that the depth of cutting into the sandalwood does not exceed the thickness of the sandalwood bark. In the tearing module, the cutting height into the sandalwood is controlled by setting the installation distance between the upper clamping plate and the bottom blade of the cutter. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the automatic peeling machine for Qingtan (Pterocarya stenoptera).

[0032] Figure 2 This is another schematic diagram of the overall structure of the automatic peeling machine for Qingtan (Pterocarya stenoptera).

[0033] Figure 3 This is a schematic diagram of the conveyor module structure.

[0034] Figure 4 This is a schematic diagram of the No. 1 extrusion module.

[0035] Figure 5 This is a schematic diagram of the conveying module and the No. 1 extrusion module.

[0036] Figure 6 This is a schematic diagram of the peeling module structure.

[0037] Figure 7 This is a schematic diagram of the frame and sensor structure.

[0038] Figure 8 This is a schematic diagram of the tearing module and the slicing module.

[0039] Figure 9 This is a schematic diagram of the scribing module structure.

[0040] Figure 10 This is a schematic diagram of the scribing blade structure.

[0041] Figure 11 This is a schematic diagram of the blocking module structure.

[0042] Figure 12 This is a schematic diagram of the tearing module structure.

[0043] Figure 13 This is a schematic diagram of another structure of the tearing module.

[0044] Figure 14 This is a schematic diagram of the cutting blade, upper clamp, guide plate, etc.

[0045] Figure 15 This is another structural diagram showing the cutter, upper clamping plate, guide plate, etc.

[0046] Figure 16 This is a schematic diagram of the structure, including the blocking column, upper clamping plate, and cutter.

[0047] Figure 17 This is a schematic diagram of the cutting blade, upper clamping plate, and other structural components.

[0048] Figure 18 This is a schematic diagram of the No. 2 extrusion module.

[0049] Figure 19 This is a schematic diagram of the No. 2 extrusion module and the conveying module.

[0050] Figure 20 This is a schematic diagram showing the blocking post extending from the blocking module on the No. 2 cutter head, blocking the end face of the Qingtan wood.

[0051] Figure 21 This is a schematic diagram showing the upper clamping plate fitting against the outer periphery of the Qingtan tree and the blade not cutting into the end face of the Qingtan tree.

[0052] Figure 22 This is a schematic diagram showing the cutting blade rising (away from the axis of the green sandalwood) and the front end of the upper clamp pressing down close to the blade. Figure 23 This is a diagram showing the skinning process complete, with the front end of the upper clamp away from the blade.

[0053] Figure 24 This is a schematic diagram showing the positioning part fitting against the outer periphery of the Qingtan tree and the cutting teeth not cutting into the end face of the Qingtan tree.

[0054] In the picture:

[0055] Qingtan 1, infrared sensor 3, collection frame 9,

[0056] Conveying module 100, base 11, conveying roller 12, rotating shaft 13, motor 14, single-row sprocket 15, bearing housing 16, double-row sprocket 17.

[0057] Extrusion module 200, mounting column 21, frame 22, slider 23, slide rail 24, hydraulic cylinder 25, I-beam connector 26, connecting block 27, lifting plate 28, pressure roller 29

[0058] The scribing module 300, the first cutter head 31, the second hydraulic cylinder 32, the scribing blade 33, the positioning part 331, and the cutting teeth 332 are all part of the scribing module.

[0059] Blocking module 400, blocking post 41, mounting plate 42, hydraulic cylinder No. 5 43.

[0060] Peeling module 500,

[0061] Tearing module 600, frame 3 51, cutter head 2 61, guide plate 62, hydraulic cylinder 3 63, baffle 64, hydraulic cylinder 4 65, cam follower 66, upper clamping plate 67, connecting block 2 68, cutter 69, blade body 691, blade edge 692, transition plate 693.

[0062] Extrusion module 2 (900), frame 2 (91), linear bearing (92), guide column (93), conveyor roller mounting block (94), hydraulic cylinder 95, pressure roller 2 (99). Detailed Implementation

[0063] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0064] An automatic peeling machine for *Pterocarya stenoptera* includes a conveying module 100, a first extrusion module 200, a second extrusion module 900, a peeling module 500, and a collection frame 9.

[0065] The conveying module 100 includes a base 11, a motor 14, a single-row sprocket 15, and a conveying roller module. The motor 14 is mounted on the short side of the base, and the output shaft of the motor 14 is connected to the single-row sprocket 15. The output shaft of the motor 14 faces the left side of the long end of the base 11. The conveying roller module includes a conveying roller 12, a rotating shaft (conveyor roller shaft) 13, a bearing seat 15, and a double-row sprocket 17. The conveying roller has a concave arc shape in the middle and is provided with miniature conveying teeth in the middle. The rotating shaft 13 is fixedly installed in the inner hole of the conveying roller 12, and its two ends are connected to a pair of bearing seats 15. The double-row sprocket 17 is mounted on the rotating shaft 13 protruding from the outside of the left bearing seat 15.

[0066] The No. 1 extrusion module 200 includes a No. 1 frame 22, a No. 1 hydraulic cylinder 25, an I-beam connector 26, a No. 1 connecting block 27, a lifting plate 28, a slide rail 24, a slider 23, a pressure roller 29, an infrared sensor 3, and a mounting column 21. The cylinder body of the No. 1 hydraulic cylinder 25 is fixedly installed at the top middle of the No. 1 frame. The top of the I-beam connector 26 is fixedly connected to the hydraulic rod of the No. 1 hydraulic cylinder 25. The slide rail 24 is installed on both sides of the No. 1 frame 22. The lifting plate 28 is fixedly installed on the slider 23. The slider 23 is slidably connected to the slide rail 24. The pressure roller 29 is installed in the middle of the lifting plate 28. The infrared sensor 3 is installed on the top of the mounting column 21. The mounting column 21 is fixed on the front platform of the No. 1 frame 22.

[0067] The I-beam connector 26 is installed in the recess of the first connecting block 27 at its middle position. The top of the lifting plate 28 has an installation groove, and the bottom of the first connecting block 27 is installed in the groove at the top of the two lifting plates 28. A connecting frame is provided in the middle of the lifting plate 28, and a reinforcing rib is provided at the upper end of the connecting frame. The pressure roller 29 is installed on the middle frame of the lifting plate. The descent of the first hydraulic cylinder 25 drives the two bottom pressure rollers 29 to press down. The centers of the two pressure rollers 29 at the bottom of the first extrusion module 200 are respectively vertically and horizontally aligned with the two rear conveying rollers 12 of the conveying module (see...). Figure 5 The function of the No. 1 extrusion module 200 is to maintain stability and provide greater friction for the Qingtan 1 as it enters the peeling module 500, so that the Qingtan 1 can pass through the peeling module 500 smoothly.

[0068] The second extrusion module 900 includes a second frame 91, a ninth hydraulic cylinder 95, an I-beam connector 26, a guide column 93, a linear bearing 92, a second pressure roller 99, a conveyor roller mounting block 94, and an infrared sensor 3. The ninth hydraulic cylinder 95 is mounted at the top center of the second frame 91. The top of the I-beam connector 26 is fixedly connected to the hydraulic rod of the ninth hydraulic cylinder 95. The top notch of the conveyor roller mounting block 94 connects to the I-beam connector 26. The second pressure roller 99 is mounted in the middle of the conveyor roller mounting block. The infrared sensor is mounted on the inner side of the second frame. The center of the second pressure roller 99 at the bottom of the second extrusion module 900 is vertically and horizontally aligned with the center of the next conveyor roller of the conveyor module (see...). Figure 19 The second extrusion module 900 is located behind the peeling module and functions the same as the first extrusion module 200. The first extrusion module 200 and the second extrusion module 900 work together to successfully peel the skin of the Qingtan 1.

[0069] The peeling module 500 includes a slicing module 300, a tearing module 600, and a third frame 51. The third frame 51 has six protrusions on its inner side. The slicing module 300 includes a first cutter disc 31, a second hydraulic cylinder 32, a slicing blade 33, an infrared sensor 3, and a blocking module 400. The first cutter disc 31 is fixedly connected to three protrusions at the front end of the third frame 51. The first cutter disc 31 has six protrusions on its inner side, evenly distributed. The top of the second hydraulic cylinder 32 is fixedly connected to the protrusions on the inner side of the first cutter disc 31. The top of the scriber 33 is connected to the hydraulic rod of the second hydraulic cylinder 32. The scriber 33 is generally H-shaped. The front end of the bottom of the scriber 33 is the positioning part 331 (arc plate), and the rear end of the bottom is the cutting tooth 332. The height of the cutting tooth (the distance from the lower part of the cutting tooth near the center of the spar to the inner arc surface of the arc plate) in the radial direction of the spar is 2mm. The second hydraulic cylinder 32 and the scriber 33 are combined and installed in six equal parts on the inner boss of the first cutter disc 31. The infrared sensor 3 is set on the front side of the top boss at the front end of the third frame 51 (see...). Figure 7 ).

[0070] The blocking module 400 includes a mounting plate 42 installed inside the first cutter head 31, a fifth hydraulic cylinder 43, a blocking post 41, and an infrared sensor 3. The top of the fifth hydraulic cylinder 43 is fixedly connected to the boss of the mounting plate 42, and the blocking post 41 is connected to the hydraulic rod of the fifth hydraulic cylinder 43. The mounting plate 42 is provided with a sliding groove, and the blocking post 41 moves within the sliding groove under the push of the hydraulic rod.

[0071] The scribing module works as follows: When the pine tree is transported to the sensor at the top front of the scribing module by the conveying module and the No. 1 extrusion module, the sensor signal is triggered, the blocking column of the blocking module extends, the pine tree is blocked by the blocking column, the sensor on the blocking column is triggered, the hydraulic cylinder drives the scribing blade to descend, the arc plate (positioning part) at the bottom of the front end of the scribing blade fits against the surface of the pine tree, the blocking column retracts, the pine tree continues to be transported forward, and the cutting teeth at the rear end of the scribing blade begin to cut into the bark of the pine tree to a depth of 2mm, finally dividing the bark of the pine tree surface into 6 equal parts.

[0072] The tearing module 600 includes a second cutter head 61, a blocking module 400, a guide plate 62, a third hydraulic cylinder 63, a baffle 64, a fourth hydraulic cylinder 65, a cam follower 66, an upper clamping plate 67, a second connecting block 68, a cutter 69, and an infrared sensor 3.

[0073] The second cutter head 61 is fixedly connected to three protrusions at the rear end of the third frame 51. The guide plate 62 is symmetrically arranged on both sides of the cutter 69, and its top is fixedly connected to the second cutter head 61. The bottom of the guide plate 62 is provided with a lower limit protrusion. The blocking module 400 is installed inside the second cutter head. The top of the third hydraulic cylinder 63 is connected to a pair of mounting blocks on the rear side of the second cutter head 61. The bottom hydraulic rod is hinged to the transition plate (protrusion) 693 fixed on the cutter body 691 on the rear side of the cutter 69. The baffle 64 is fixedly installed on the rear side of a pair of guide plates 62.

[0074] The cutting blade 69 has an L-shaped front end, a blade 692 at the bottom, and a blade body 691 at the rear. The cutter 69 has mounting cylinders on both sides. The small hole at the rear end of the second connecting block 68 connects to the cylinders and is fastened with screws. The front end of the second connecting block connects to the cam follower 66. The head of the cam follower 66 is installed in the groove of the guide plate 62, which is slightly larger than the cam follower. The top of the fourth hydraulic cylinder 65 is installed on the front side of the upper end of the cutter body 691 of the cutter 69. The bottom hydraulic rod is hinged to the front of the upper clamping plate 67. The rear side of the upper clamping plate 67 is hinged to the mounting brackets on both sides of the cutter body 691. The distance between the mounting brackets and the bottom blade 692 in the radial direction of the purlin is 2mm. The upper clamping plate 67 and the bottom blade 692 have a certain curvature in the circumferential direction of the purlin. In the axial direction of the purlin, the length of the clamping plate 67 is longer than the front end of the bottom blade 692 (the front end of the upper clamping plate 67 extends forward beyond the front end of the blade 692). The blocking post 41 in the blocking module 400 is located in front of the bottom blade and behind the front end of the upper clamping plate (see...). Figure 16 The cutting blade 69 in the tearing module 600 and the slicing blade in the slicing module 300 are staggered, with the cutting blade 69 positioned between the two slicing blades (see...). Figure 8 ).

[0075] The tearing module's workflow: The ebony bark passes through the slicing module, its surface being divided into six equal parts. When the bark reaches the sensor position at the top of the tearing module, a signal is triggered, causing the blocking post in the blocking module to extend, blocking the bark. The sensor at the front end of the blocking post is triggered, causing hydraulic cylinder 63 to descend, driving the cutter downwards (moving towards the center of the bark). The hydraulic rod of hydraulic cylinder 63 is hinged to the transition plate 693 fixed at the rear end of the cutter. During descent, the cutter rotates around the cam follower 66, causing the front end of the cutter's blade 692 to move away from the center of the bark, while the rear end of the transition plate 693 moves closer to the center of the bark, until the top rear side of the blade 691 contacts the baffle 64. As descent continues, the bottom blade 692 descends horizontally, and the upper clamping plate 67 is initially parallel to the blade. During descent, the front end of the upper clamping plate 67 contacts the surface of the bark, the blocking post 41 retracts, and the bark continues to move backwards. The blade moves, and the bottom blade 692 begins to cut into the *Pterocarya stenoptera*. Hydraulic cylinder 65 extends, causing the upper clamping plate 67 to press downwards. The *Pterocarya stenoptera* bark is clamped by the blade 692 and the upper clamping plate 67. Hydraulic cylinder 63 retracts, causing the cutter 69 to rise, peeling off the bark. During the rise, due to the constraint between the cam follower and the guide plate, the cutter rotates around the cam follower 66. The front end of the blade 692 is close to the center of the *Pterocarya stenoptera*, while the rear end of the transition plate 693 is far from the center. The clamping jaws of the upper clamping plate and the bottom blade face the center of the *Pterocarya stenoptera*. The bark is suspended during the peeling process. The *Pterocarya stenoptera* continues forward. Under the simultaneous action of six cutters, the bark is peeled off, and the core material is discharged, exiting through the second extrusion module. Hydraulic cylinder 65 retracts to its initial state, the upper clamping plate 67 is parallel to the blade 692, and the bark clamped by the upper clamping plate and the cutter falls into the lower receiving box.

[0076] This invention can peel the bark of *Pterocarpus santalinus* with a diameter of approximately 70mm to 90mm, preserving the integrity of the bark to the maximum extent. The peeling module designed in this invention has a blade limiting structure, so that when peeling *Pterocarpus santalinus* of different diameters, the depth to which the blade cuts is still the thickness of the bark, avoiding damage to the core.

[0077] The scope of protection of this patent includes, but is not limited to, the above-described embodiments. The scope of protection of this patent is determined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this patent.

Claims

1. An automatic bark peeling machine for *Pterocarya stenoptera*, characterized in that: It includes a conveying module (100), a first extrusion module (200), a second extrusion module (900), and a peeling module (500). Conveying modules (100) are set at both the front and rear ends of the peeling module (500). The first extrusion module (200) is located above the conveying module (100) at the front end of the peeling module (500), and the second extrusion module (900) is located above the conveying module (100) at the rear end of the peeling module (500). The conveying module (100) includes a base (11) and multiple conveying rollers (12) rotatably mounted on the base (11). The conveying rollers (12) rotate under the drive of the transmission mechanism to drive the Qingtan to move along the axial direction. The No. 1 extrusion module (200) and the No. 2 extrusion module (900) are used to press the green sandalwood onto the conveying rollers (12) in the conveying module (100) located at the front and rear ends of the peeling module (500); The peeling module (500) includes a slicing module (300), a tearing module (600), and a third frame (51). The slicing module (300) includes a first cutter head (31), a second hydraulic cylinder (32), and slicing blades (33). The first cutter head (31) is fixedly installed at the front end of the third frame (51). The cylinder bodies of multiple second hydraulic cylinders (32) are installed on the inner side of the first cutter head (31). Each slicing blade (33) is fixedly installed on the piston rod of a second hydraulic cylinder (32). Multiple slicing blades are arranged around the circumference of the *Pterocarya stenoptera*. When the *Pterocarya stenoptera* moves along the axial direction, each slicing blade (33) cuts a slit parallel to the axial direction of the *Pterocarya stenoptera*. The depth of the slit in the radial direction of the *Pterocarya stenoptera* is not less than the thickness of the *Pterocarya stenoptera* bark. Multiple slits divide the *Pterocarya stenoptera* bark into multiple strips. The tearing module (600) includes a second cutter head (61), a third hydraulic cylinder (63), a cutter (69), an upper clamping plate (67), and a fourth hydraulic cylinder (65); multiple cutters (69) are arranged around the circumference of the purslane, each cutter (69) including a blade body (691) and a cutting edge (692) extending along the chord direction of the purslane; the second cutter head (61) is mounted at the rear end of the third frame (51), and the cylinder bodies of the multiple third hydraulic cylinders (63) are mounted on the second cutter head (61). On the ), the blade body (691) of each cutter (69) is directly or indirectly connected to the piston rod of the third hydraulic cylinder (63), which is used to drive the cutter (69) to move in the radial direction of the pine tree; the two ends of the fourth hydraulic cylinder (65) are respectively hinged to the blade body (691) and the front part of the upper clamping plate (67), and the rear part of the upper clamping plate (67) is hinged to the blade body (691); in the radial direction of the pine tree, the blade (692) is closer to the center of the pine tree than the upper clamping plate (67); The cutting knife (69) and the slicing knife (33) are arranged alternately around the circumference of the Qingtan tree; When the bark is cut into strips and moves axially from front to back, the blade (692) of each cutter (69) cuts into the end of the bark and extends between the end of the strip and the trunk; then the fourth hydraulic cylinder (65) moves, causing the front of the upper clamping plate (67) to flip downward, clamping the end of the strip between the blade (692) and the upper clamping plate (67); then the third hydraulic cylinder (63) moves the cutter (69) and the upper clamping plate (67) radially away from the bark, and the bark continues to move axially backward, and the strip of bark gradually separates from the trunk; Two guide plates (62) are symmetrically arranged on both sides of each cutter (69). The guide plates (62) are fixedly connected to the second cutter head (61). The rear ends of the second connecting blocks (68) are fixed on both sides of the cutter body (691). The front end of the second connecting blocks (68) is connected to the cam follower (66). The cam follower (66) is slidably installed in the slots on the guide plates (62) that extend along the radial direction of the purslane. A baffle (64) is fixed between the rear ends of the two guide plates (62). A transition plate (693) extending backward is fixed on the rear side of the cutter body (691). In the radial direction of the purslane, the transition plate (693) is closer to the center of the purslane than the baffle (64). The transition plate (693) is hinged to the piston rod of the third hydraulic cylinder (63). When the No. 3 hydraulic cylinder (63) drives the transition plate (693), the cutter (69), and the No. 2 connecting block (68) to move towards the center of the green sandalwood along the radial direction, the cutter body (691) swings backward relative to the guide plate (62) around the cam follower (66). When the rear side of the cutter body (691) contacts the front side of the baffle (64), the cutting edge (692) extends in the axial direction parallel to the green sandalwood, while the cam follower (66) slides in the groove on the guide plate (62). When the No. 3 hydraulic cylinder (63) drives the transition plate (693), the cutter (69), and the No. 2 connecting block (68) to move away from the center of the green sandalwood along the radial direction, the cutter body (691) swings forward relative to the guide plate (62) around the cam follower (66), and the cutting edge (692) extends in an inclined direction with a certain angle to the axial direction of the green sandalwood, while the cam follower (66) slides in the groove on the guide plate (62). The front end of the upper clamping plate (67) extends forward beyond the blade (692) in the axial direction, and the upper clamping plate (67) and the blade (692) are parallel in the axial direction of the *Pterocarya stenoptera*. When the bark is cut into strips and moves axially from front to back beyond the front end of the upper clamping plate (67) but before reaching the front end of the blade (692), the *Pterocarya stenoptera* stops moving. Then, the third hydraulic cylinder (63) drives the transition plate (693), the cutter (69), and the upper clamping plate (67) to move towards the center of the *Pterocarya stenoptera* in the radial direction. The blade (691) swings backward relative to the guide plate (62) around the cam follower (66). The rear side of the blade (691) contacts the front side of the baffle (64) and slides relative to the baffle (64). When the upper clamping plate (67) contacts the outer periphery of the *Pterocarya stenoptera*, the third hydraulic cylinder (63)... The action stops, and the blade (692) extends in a direction parallel to the axial direction of the pine tree. Then, the pine tree moves from front to back along the axial direction, and the blade (692) of the cutter (69) cuts into the end of the pine tree and gradually extends into the end of the strip bark between the trunk and the trunk. Then, the fourth hydraulic cylinder (65) moves, causing the front part of the upper clamping plate (67) to flip downward, clamping the end of the strip bark between the blade (692) and the upper clamping plate (67). Then, the third hydraulic cylinder (63) drives the cutter (69) to move away from the pine tree in the radial direction. The blade (691) swings forward relative to the guide plate (62) around the cam follower (66). The blade (692) extends in an inclined direction with a certain angle to the axial direction of the pine tree. As the axial direction of the pine tree moves, the strip bark gradually separates from the trunk. After the bark strips are completely separated from the trunk, the pine tree stops moving axially. The fourth hydraulic cylinder (65) is activated, causing the front of the upper clamping plate (67) to flip upward, releasing the ends of the clamped bark strips, which then fall freely.

2. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The slicing cutter (33) has a positioning part (331) extending parallel to the axial direction of the pine tree and a cutting tooth (332) extending in the radial direction of the pine tree. In the axial direction of the pine tree, the positioning part (331) is located in front of the cutting tooth (332); when the pine tree moves from front to back along the axial direction beyond the front end of the positioning part (331) but before reaching the cutting tooth (332), the pine tree stops moving. Then, the second hydraulic cylinder (32) drives the slicing knife (33) to move towards the center of the pine tree along the radial direction. When the positioning part (331) contacts the outer periphery of the pine tree, the second hydraulic cylinder (32) stops operating. When the pine tree moves backward along the axial direction again, the cutting tooth (332) of each slicing knife (33) cuts a slit parallel to the axial direction of the pine tree on the pine tree.

3. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1 or 2, characterized in that, It also includes a controller, and the peeling module (500) also includes a blocking module (400), which is mounted on the first cutter head (31) and / or the second cutter head (61); The blocking module (400) includes a blocking post (41), a No. 5 hydraulic cylinder (43) that drives the blocking post (41) to move along the radial direction of the pine tree, a mounting plate (42) that fixes the No. 5 hydraulic cylinder (43), and a sensor installed on the blocking post (41). When the blocking module (400) is installed on the first cutter head (31), the mounting plate (42) is fixed on the first cutter head (31). The blocking post (41) is located behind the front end of the positioning part (331) and in front of the front end of the cutting tooth (332). When the green sandalwood moves from front to back along the axial direction, the end face of the green sandalwood exceeds the front end of the positioning part (331) but does not reach the cutting tooth (332), the end face of the green sandalwood contacts the blocking post (41), the blocking post (41) blocks the movement of the green sandalwood, the sensor is triggered to send a signal to the controller, the controller controls the conveying module (100) to stop the operation, and the green sandalwood stops moving. When the blocking module (400) is installed on the second cutter head (61), the mounting plate (42) is fixed on the second cutter head (61). The blocking post (41) is located behind the front end of the upper clamping plate (67) and in front of the front end of the blade (692). When the green sandalwood moves from front to back along the axial direction, the end face of the green sandalwood exceeds the front end of the upper clamping plate (67) but does not reach the front end of the blade (692), the end face of the green sandalwood contacts the blocking post (41), the blocking post (41) blocks the movement of the green sandalwood, the sensor is triggered to send a signal to the controller, the controller controls the conveying module (100) to stop, and the green sandalwood stops moving.

4. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The transmission mechanism in the conveying module (100) is a chain drive mechanism. A single row of sprockets is fixed on the motor output shaft. The conveying roller (12) shaft is mounted on the base (11) through a bearing seat. A double row of sprockets is fixed on the conveying roller (12) shaft. The single row of sprockets is connected to one of the sprockets in the double row of sprockets by a chain. The two sprockets in two adjacent double row of sprockets are connected by a chain.

5. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The No. 1 extrusion module (200) includes a No. 1 frame, a No. 1 hydraulic cylinder, and a pressure roller (29). The cylinder body of the No. 1 hydraulic cylinder is mounted on the No. 1 frame. The piston rod of the No. 1 hydraulic cylinder is hinged to the upper part of the lifting plate. The lifting plate is fixedly mounted on the slider. The slider is slidably connected to the slide rail fixed on the No. 1 frame. The pressure roller (29) is mounted on the lower part of the lifting plate. When the No. 1 hydraulic cylinder is activated, it drives the slider, the lifting plate, and the pressure roller (29) to move downward. The pressure roller (29) presses the green sandalwood onto the conveying roller (12).

6. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The second extrusion module (900) includes a second frame (91), a linear bearing (92), a guide column (93), a conveyor roller mounting block (94), a ninth hydraulic cylinder (95), and a second pressure roller (99). The guide column (93) is slidably mounted on the second frame (91) via the linear bearing (92). The conveyor roller mounting block (94) is fixed at the lower end of the guide column (93). The second pressure roller (99) is rotatably mounted on the conveyor roller mounting block (94). The cylinder body of the ninth hydraulic cylinder (95) is mounted on the second frame. The piston rod of the ninth hydraulic cylinder (95) is connected to the conveyor roller mounting block (94). When the ninth hydraulic cylinder (95) moves, it drives the conveyor roller mounting block (94) and the second pressure roller (99) to move downwards, pressing the green sandalwood onto the conveyor roller (12) through the second pressure roller (99).

7. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The conveyor roller (12) has a concave arc shape in the middle and is provided with protruding conveyor teeth.

8. The automatic peeling machine for *Pterocarya stenoptera* as described in claim 1, characterized in that, The upper clamp (67) and the blade (692) have a certain curvature in the circumference of the green sandalwood.

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