External wall insulation board cutting equipment

Abstract

The present invention relates to an external wall insulation board cutting device, comprising a base, a movable frame that can be guided and moved in the up and down directions, two groups of support blocks and a driving mechanism are arranged on the base, two groups of pressure block assemblies and a sliding seat are arranged on the movable frame, two groups of long screws and two groups of rotating motors are arranged on the movable frame, and the two groups of long screws are each driven by a group of rotating motors, the pressure block assembly includes a pressure head, and a height-adjustable flattening and cutting assembly is installed at the lower end of the sliding seat, and the flattening and cutting assembly includes a frame, a clamping part and a cutting knife, a gap is arranged in the middle of the clamping part, and the cutting knife is located in the gap, a brush is arranged on the outside of the clamping part, a chip collecting chamber is opened in the middle of the clamping part, and a chip extraction port is opened on the opposite side of the clamping part, and a negative pressure fan is fixed on the movable frame. The present invention can clean up the debris while completing the cutting, avoid the generation of debris during the cutting process and the residual debris on the insulation board after cutting, and can also ensure the flatness of the cutting surface.

Description

Technical Field

[0001] The invention relates to the field of cutting, and in particular to an external wall insulation board cutting device. Background Art

[0002] External wall insulation is a method of placing an insulation layer outside the main wall material. It is the most widely used insulation method and is also strongly advocated by the country because it can reduce the impact of points and protect the main wall material from much temperature deformation stress. Commonly used external wall insulation materials in the construction field include polystyrene foam board (EPS), polystyrene extruded board (XPS), phenolic board, polyurethane board and rock wool. These insulation materials are promoted and used nationwide due to their good insulation performance and convenient construction.

[0003] In the actual construction process, in order to meet the construction requirements, the insulation board needs to be cut into different sizes. When workers cut with hand-held cutting tools or use cutting machines, the following problems are common: First, the starting end of the cutting mark of the insulation board will be upturned or notched, and there will be a weak insulation area when it is used for exterior wall insulation; second, a lot of debris will be generated during the cutting process, and some debris will also adhere to the insulation board after cutting, and the debris in the insulation board is toxic to the human body. Strict protection is required during the cutting operation and insulation construction to avoid debris sticking to the exposed skin and to prevent debris from entering the respiratory tract. Therefore, it is necessary to develop an exterior wall insulation board cutting device that can solve the above technical problems. Summary of the invention

[0004] The object of the present invention is to provide an external wall insulation board cutting device which can ensure that the insulation board cuts smoothly and can avoid the generation of debris during the cutting process and the residual debris on the insulation board after cutting.

[0005] To this end, an external wall insulation board cutting device of the present invention adopts the following technical solution:

[0006] An external wall insulation board cutting device comprises a base, a movable frame which can be guided and moved in an up-down direction is arranged on the base, two groups of support blocks and a driving mechanism for driving the support blocks to move away from or towards each other in a left-right direction are also arranged on the base;

[0007] The movable frame is provided with two groups of pressing block assemblies and a sliding seat for guiding movement in the left-right direction, the sliding seat is located between the two groups of pressing block assemblies, and the movable frame is rotatably provided with two groups of long screws extending left-right, the two groups of pressing block assemblies are threadedly connected with one group of long screws and are gap-matched with the other group of long screws, the sliding seat is sleeved on the two groups of long screws and is gap-matched with them, and the two groups of long screws are each driven by a group of rotating motors to drive the corresponding pressing block assembly to move left-right;

[0008] The pressing block assembly includes a pressing head, and the opposite end faces of the pressing head are processed with stepped grooves for clamping the ends of the insulation board to be cut;

[0009] A height-adjustable flattening and cutting assembly is installed at the lower end of the sliding seat, and the flattening and cutting assembly can be installed on the sliding seat in a guided and movable manner along the front-back direction. The flattening and cutting assembly includes a frame, and a pressing part and a cutting knife are arranged at the lower end of the frame. A slit extending along the front-back direction is arranged in the middle of the pressing part, and the cutting knife is located in the slit. A brush is arranged on the outer side of the pressing part;

[0010] A chip collecting chamber is provided in the middle of the clamping part, and a chip extraction port connected to the chip collecting chamber is provided on the opposite side of the clamping part. A negative pressure fan is also fixed on the movable frame, and the air inlet of the negative pressure fan is connected to the chip collecting chamber. A filter assembly is arranged between the chip collecting chamber and the air inlet of the negative pressure fan.

[0011] Furthermore, the sliding seat is fixedly connected to one group of the pressing block assemblies so that the flattening and cutting assembly moves synchronously with the corresponding pressing block assembly.

[0012] Furthermore, a distance adjustment mechanism is provided between the sliding seat and the pressing block assembly fixed thereto, and the distance adjustment mechanism comprises a screw rod and a nut threadedly connected to the screw rod.

[0013] Furthermore, the front and rear ends of the frame are both provided with air cavities, one end of the air cavity is closed, and the other end is used to introduce the airflow sent out of the negative pressure fan through the pipeline, and the lower end of the frame is provided with an air curtain outlet whose upper end is connected to the air cavity, and the air curtain outlet extends vertically downward or the lower end is slightly inclined inward to form a high-pressure air curtain area at both ends of the clamping part.

[0014] Furthermore, the driving mechanism is a rack and pinion mechanism.

[0015] Furthermore, an elastic cushion layer is provided at the lower end of the pressing portion.

[0016] Furthermore, a plurality of groups of rotating rollers are rotatably provided at the lower end of the pressing portion, the rotation axes of the rotating rollers extend in the left-right direction and the lower end surfaces thereof protrude from the lower end surface of the pressing portion.

[0017] Furthermore, a plurality of groups of first magnets are arranged at intervals along the circumferential direction on the roller surface of the rotating roller, a second magnet is arranged on the blade shaft of the cutting blade, and the polarity of the outer end of the first magnet is the same as that of the outer end of the second magnet.

[0018] Furthermore, the chip extraction port also includes a portion arranged between two groups of rotating rollers.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] When the present invention is used, the pressing block assembly is used to press the insulation board to be cut onto the support block. When the two groups of support blocks are at the closest distance, the cutting knife can also extend between the two groups of support blocks to complete the cutting operation. During the cutting process, as the flattening cutting assembly moves back and forth, the generated chips will be confined in the high-pressure air curtain area, and then sucked into the chip collection chamber under the action of negative pressure. During the return process after the cutting is completed, the two groups of support blocks are at the farthest distance, the flattening cutting assembly falls, and the brush brushes the surface of the newly generated cutting seam of the insulation board to sweep off the debris adhered thereon, and then the swept debris and the debris in the support block seam are sucked into the chip collection chamber, so that the debris can be cleaned up while the cutting is completed, avoiding the generation of debris during the cutting process and residual debris on the insulation board after cutting.

[0021] Furthermore, by calibrating the distance between the flattening and cutting assembly and one of the groups of the pressing block assemblies in advance, and then fixing the flattening and cutting assembly and the pressing block assembly together so that the two move together, the device structure can be simplified and the cutting accuracy and cutting width can be guaranteed.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of an external wall insulation board cutting device of the present invention;

[0025] Figure 2 It is a schematic diagram of the local structure at A;

[0026] Figure 3 It is a structural schematic diagram of the chip collection chamber;

[0027] Figure 4 is a schematic diagram of the structure of the driving mechanism;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the second embodiment;

[0029] Figure 6 It is a structural schematic diagram of the distance adjustment mechanism;

[0030] Figure 7 It is a structural schematic diagram of the pressing part in the third embodiment;

[0031] Figure 8 It is a side view of the clamping portion in the third embodiment.

[0032] Among them: 1. base; 2. support block; 3. support column; 4. moving frame; 5. lifting drive member; 6. screw; 7. rotating motor; 8. pressure block assembly; 9. insulation board; 11. sliding seat; 12. flattening cutting assembly; 13. frame; 14. clamping part; 15. cutting knife; 16. gap; 17. sliding drive motor; 18. chip collection chamber; 19. chip extraction port; 20. negative pressure fan; 21. filter assembly; 23. wind chamber; 24. wind curtain outlet; 25. brush; 26. distance adjustment mechanism; 27. rotating roller; 28. first magnet; 29. ​​second magnet; 81. pressure head; 82. step groove. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Embodiment 1 of an external wall insulation board cutting device of the present invention:

[0036] The specific structure of the external wall insulation board cutting device of the present invention is as follows Figures 1 to 4 As shown, it includes a base 1, two groups of support blocks 2 are slidably arranged on the base 1, support columns 3 are fixed at the four corners of the base 1, an upper beam is fixed at the upper end of the support column 3, a mobile frame 4 is floatingly arranged on the base 1, a lifting drive member 5 is arranged between the mobile frame 4 and the support column 3, and the lifting drive member 5 drives the mobile frame 4 to rise and fall along the support column 3.

[0037] In this embodiment, the base 1 is arranged along the left and right directions in the length direction and along the front and back directions in the width direction. In the front and back directions, the support block 2 is staggered with the support columns 3 located on both sides thereof, so that the insulation board 9 on the support block 2 can slide out in the left and right directions without being blocked by the support columns 3.

[0038] Two groups of long screws 6 are arranged on the moving frame 4 along its length direction. Two groups of rotating motors 7 are also rotatably arranged on the moving frame 4 for driving the corresponding long screws 6 to rotate. Two groups of pressing block assemblies 8 are arranged on the long screws 6. The front and rear ends of the two groups of pressing block assemblies 8 are matched with the guides of the moving frame 4, so the pressing block assemblies 8 can only move left and right along the moving frame 4. It should be emphasized that the pressing block assembly 8 is not threadedly matched with both groups of long screws 6, but only threadedly matched with one group of long screws 6 and gap-matched with the other group of long screws 6. Therefore, power will only be transmitted to the corresponding pressing block assembly 8 when the long screw 6 threadedly matched with it is driven to rotate by the rotating motor 7. In other words, the two groups of rotating motors 7 each control a group of pressing block assemblies 8 to move forward and backward along the moving frame 4.

[0039] The insulation board 9 to be cut is placed above the two groups of support blocks 2. The pressing block assembly 8 is used to press the insulation board 9 against the support blocks 2 to prevent the insulation board 9 from moving relative to the support blocks 2.

[0040] The pressing block assembly 8 includes a pressing head 81. The pressing heads 81 in the two sets of pressing block assemblies 8 have stepped grooves 82 formed on their opposite end faces. The stepped grooves 82 are used to clamp the two ends of the insulation board 9 to be cut. Therefore, the pressing block assembly 8 can limit the freedom of the insulation board 9 from the up and down directions and the left and right directions. At the same time, when the pressing block assembly 8 moves left and right along the moving frame 4, it can also push the insulation board 9 to move relative to the support block 2 to deliver the cut insulation board 9.

[0041] A sliding seat 11 is also provided on the mobile frame 4 between the two groups of pressing block assemblies 8, and a flattening and cutting assembly 12 is installed on the sliding seat 11. The flattening and cutting assembly 12 includes a slider and a frame 13. A pressing portion 14 and a cutting knife 15 are provided at the lower end of the frame 13. A slit 16 extending in the front-to-back direction is provided in the middle of the pressing portion 14, and the cutting knife 15 is located in the slit 16. The sliding seat 11 is installed on the mobile frame 4 in a guided and movable manner along the left-right direction, and the slider is installed on the mobile frame 4 in a guided and movable manner along the front-to-back direction. A sliding drive motor 17 for driving the slider to move forward and backward along the mobile frame 4 is provided between the slider and the mobile frame 4. A height adjustment push rod is provided between the frame 13 and the slider, and the height adjustment push rod is used to drive the flattening and cutting assembly 12 to rise and fall. The sliding seat is fixedly connected to the pressing block assembly at the left end so that the flattening and cutting assembly moves synchronously with the pressing block assembly.

[0042] The clamping part 14 is fixed to the lower end of the frame 13. Along the cutting direction, the end where cutting starts is defined as the front end, and the end where cutting is completed is defined as the rear end. In this embodiment, in the front-to-back direction, both ends of the slit 16 extend out of the cutting knife 15. In other embodiments, the front end of the cutting knife 15 may also partially extend out of the slit 16. It is only necessary to ensure that the front end of the clamping part 14 extends forward beyond the cutting knife 15, and the contact point between the cutting knife 15 and the upper end surface of the insulation board 9 when in the cutting station is within the contact range between the clamping part 14 and the insulation board 9, so as to ensure that the part cut by the cutting knife 15 is the part pre-clamped by the clamping part 14, thereby ensuring the cutting quality at the beginning of cutting.

[0043] There is a gap between the two groups of support blocks 2 for the cutting blade 15 to pass through. The two groups of support blocks 2 are driven by a driving mechanism to synchronously approach each other or synchronously move away from each other.

[0044] A chip collecting chamber 18 is provided in the middle of the pressing part 14, and a chip extraction port 19 is provided on the opposite side of the pressing part 14, and the chip extraction port 19 is connected to the chip collecting chamber 18. A negative pressure fan 20 is fixed on the moving frame 4, and the air inlet of the negative pressure fan 20 is connected to the chip collecting chamber 18, and the air outlet is sent out through the pipeline. The chips generated during the cutting process will be sucked into the chip collecting chamber 18 through the chip extraction port 19 before they are diffused. A filter assembly 21 is provided between the chip collecting chamber 18 and the air inlet of the negative pressure fan 20, and the filter assembly 21 can prevent chips from entering the negative pressure fan 20 and blocking the negative pressure fan 20.

[0045] The front and rear ends of the frame 13 are provided with air cavities 23, one end of the air cavity 23 is closed, and the other end is used to introduce the airflow sent out of the negative pressure fan 20 through the pipeline. The lower end of the frame 13 is provided with an air curtain outlet 24 whose upper end is connected to the air cavity 23. The air curtain outlet 24 extends vertically downward or the lower end is slightly inclined inward, and its inclination angle does not exceed 10 degrees. The airflow sent out by the air curtain outlet 24 forms a high-pressure air curtain area at both ends of the pressing part 14, which can prevent the chips from spreading outward. In order to make the dust-blocking effect of the high-pressure air curtain area better, the high-pressure air curtain area should be able to cover the front and rear ends of the gap 16.

[0046] A brush 25 is provided on the side of the clamping portion 14 away from the cutting knife 15. It should be emphasized that the sliding direction of the support block 2 is perpendicular to the direction of the cutting seam to be cut. After a single cutting is completed, the driving mechanism is actuated to cause the two groups of support blocks 2 to pull the two cut insulation boards 9 away in the left and right directions, and the flattening cutting assembly 12 is lowered to align the brush 25 with the cutting surface of the insulation board 9. The flattening cutting assembly 12 is driven to run in the reverse longitudinal direction once to brush off the remaining debris on the cutting surface of the insulation board 9, and the brushed debris falls into the gap between the two groups of support blocks 2. The remaining debris in the gap between the two groups of support blocks 2 can be cleaned up by cooperating with the negative pressure fan 20. It can not only suppress the flying of debris at the cutting site, but also clean the cutting surface of the insulation board 9.

[0047] The driving mechanism is a gear rack mechanism, and its structure is as follows Figure 4 As shown, the two groups of support blocks 2 are respectively fixed to a group of racks, and the rotation angle of the gear is calibrated in advance to ensure that when the gear rotates clockwise to the maximum setting angle, the farthest distance between the two groups of support blocks 2 is adapted to the width of the flattening and cutting assembly 12. At this time, when the flattening and cutting assembly 12 is driven downward to extend between the two groups of support blocks 2, the brushes 25 on both sides can clean up the debris at the cutting seam of the insulation board 9. When the gear rotates counterclockwise to the maximum setting angle, the shortest distance between the two groups of support blocks 2 is adapted to the thickness of the cutting knife 15 to ensure that the cutting knife 15 will not cut the support block 2 during the cutting operation.

[0048] When the support blocks 2 are at their closest distance, the cutting operation can support the insulation board 9 as much as possible from below, providing sufficient support surface to prevent the lower end of the insulation board 9 from being suspended in the air, resulting in uneven cutting seams. When the support blocks 2 are at their farthest distance, the debris cleaning operation can be performed by sinking the brush and the negative pressure cleaning part between the two support blocks 2, and the cutting surface of the insulation board 9 and the debris between the two groups of support blocks 2 can be cleaned at the same time.

[0049] In a more preferred embodiment, an elastic cushion layer is provided at the bottom of the pressing portion 14 to prevent the surface of the insulation board 9 from being damaged due to friction.

[0050] The working principle of the present invention is described as follows:

[0051] First, place the insulation board 9 to be cut above the two groups of support blocks 2, and control the mobile frame 4 to fall through the lifting drive 5. During this process, the two groups of rotating motors 7 are controlled to rotate at the same time, so that the step grooves 82 in the pressure head 81 fit and clamp at both ends of the insulation board, and then adjust the height of the flattening and cutting assembly 12 so that the front end of the clamping part 14 clamps the insulation board 9. Since the flattening and cutting assembly 12 is fixed together with the block assembly 8 at the left end, by calibrating the distance between the cutting knife 15 and the block assembly 8 at the left end in advance, it can be ensured that when the left end pressure head 81 clamps the left end of the insulation board 9, the distance between the cutting knife 15 and the left end of the insulation board 9 is exactly equal to the width of the insulation board 9 to be cut.

[0052] After that, the corresponding rotating motor 7 is controlled to push the two groups of block assemblies 8 and the insulation board 9 to move together until the flattening cutting assembly 12 is located just above the gap between the two groups of support blocks 2. The cutting knife 15 is started and the flattening cutting assembly 12 is controlled to move backward to complete one cutting.

[0053] After the cutting is completed, the two groups of support blocks 2 are driven to move away from each other to the farthest distance through the driving mechanism, and the flattening cutting assembly 12 is controlled to return forward once, so that the chips at the newly cut seam of the insulation board 9 can be cleaned up.

[0054] Afterwards, the pressing block assembly 8 moves to send out the cut part, and the remaining part is reset for the next cutting operation.

[0055] Embodiment 2 of an external wall insulation board cutting device of the present invention:

[0056] The difference between this embodiment and the first embodiment is that a distance adjustment mechanism 26 is provided between the sliding seat 11 and the pressing block assembly 8 at the left end. The distance adjustment mechanism 26 includes two ends and a screw rod installed in the two parts. The two ends are respectively fixed between the sliding seat 11 and the pressing block assembly 8 at the left end. A nut is sleeved on the screw rod. By adjusting the position of the nut on the screw rod, the distance between the pressing block assembly 8 at the left end and the sliding seat 11 can be adjusted, thereby adjusting the cutting width of the insulation board 9. For specific structure, refer to Figure 5 and Figure 6 .

[0057] Embodiment 3 of an external wall insulation board cutting device of the present invention:

[0058] The difference between this embodiment and the first embodiment is that a plurality of rotating rollers 27 are rotatably provided at the lower end of the pressing portion 14, the rotation axis of the rotating rollers 27 extends in the left-right direction, and the lower end surface thereof protrudes from the lower end surface of the pressing portion 14. When the flattening and cutting assembly 12 moves relative to the heat preservation plate 9 to complete the cutting operation, the roller surface of the rotating rollers 27 can roll over the upper end surface of the heat preservation plate 9. The specific structure is as follows Figure 7 and Figure 8 shown.

[0059] The pressing part is made of non-ferromagnetic and non-magnetic material (such as plastic, etc.), four groups of first magnets 28 are arranged at intervals along the circumferential direction on the roller surface of the rotating roller 27, and the second magnet 29 is arranged on the knife shaft of the cutting knife 15. The polarity of the outer end of the first magnet 28 is the same as that of the outer end of the second magnet 29. Therefore, during the rotation of the knife shaft, under the action of the repulsive magnetic force, the rotating roller 27 will rotate accordingly. The rotating roller 27 can rotate relative to the pressing part 14, firstly, it can avoid scratching the board surface of the thermal insulation board 9; secondly, during the rotation of the rotating roller 27, it can drive the debris adhered to the rotating roller 27 to rotate, so as to avoid the debris being stuck between the rotating roller 27 and the pressing part 14 and affecting the rotation of the rotating roller 27.

[0060] The power of the knife shaft is transmitted to the rotating roller 27 through a flexible magnetic mechanism. When the rotating roller 27 is stuck, the knife shaft will push the rotating roller once every rotation, which can not only prevent the upper end surface of the heat preservation plate 9 from being scratched, but also prevent the rotating roller 27 from being forced to rotate and causing structural damage when it is stuck, and also prevent the rotating roller 27 from overheating due to excessive rotation speed. While realizing the deceleration function, the structure of the present invention is simplified.

[0061] In this embodiment, the chip extraction opening 19 also includes a portion disposed between the two groups of rotating rollers 27 , where the chip extraction opening 19 can smoothly absorb the debris taken away by the rotating rollers 27 into the chip collecting chamber 18 .

Claims

1. An external wall insulation board cutting device, characterized in that: The invention comprises a base, on which a movable frame capable of guiding and moving in an up-down direction is arranged, and on which two groups of supporting blocks and a driving mechanism for driving the supporting blocks to move away from or toward each other in a left-right direction are also arranged; The movable frame is provided with two groups of pressing block assemblies and a sliding seat for guiding movement in the left-right direction, the sliding seat is located between the two groups of pressing block assemblies, and the movable frame is rotatably provided with two groups of long screws extending left-right, the two groups of pressing block assemblies are threadedly connected with one group of long screws and are gap-matched with the other group of long screws, the sliding seat is sleeved on the two groups of long screws and is gap-matched with them, and the two groups of long screws are each driven by a group of rotating motors to drive the corresponding pressing block assembly to move left-right; The pressing block assembly includes a pressing head, and the opposite end faces of the pressing head are processed with stepped grooves for clamping the ends of the insulation board to be cut; A height-adjustable flattening and cutting assembly is installed at the lower end of the sliding seat, and the flattening and cutting assembly can be installed on the sliding seat in a guided and movable manner in the front-rear direction. The flattening and cutting assembly includes a frame, and a pressing portion and a cutting knife are arranged at the lower end of the frame. A slit extending in the front-rear direction is arranged in the middle of the pressing portion, and the cutting knife is located in the slit. A brush is arranged on the outer side of the pressing portion. After a single cutting is completed, the driving mechanism is actuated to cause the two groups of support blocks to pull the two cut insulation boards away in the left and right directions, and the flattening and cutting assembly is lowered to align the brush with the cutting surface of the insulation board. The flattening and cutting assembly is driven to run in the longitudinal reverse direction once to brush off the remaining debris on the cutting surface of the insulation board, and the brushed debris falls into the gap between the two groups of support blocks. A chip collecting chamber is provided in the middle of the pressing part, a chip extraction port connected to the chip collecting chamber is provided on the side opposite to the pressing part, a negative pressure fan is also fixed on the movable frame, an air inlet of the negative pressure fan is connected to the chip collecting chamber, and a filter assembly is provided between the chip collecting chamber and the air inlet of the negative pressure fan; The sliding seat is fixedly connected to one group of the pressing block assemblies so that the flattening and cutting assembly moves synchronously with the corresponding pressing block assembly; A distance adjustment mechanism is provided between the sliding seat and the pressing block assembly fixed thereto, and the distance adjustment mechanism comprises a screw rod and a nut threadedly connected to the screw rod; The movable frame is provided with a lifting drive member, and the lifting drive member is used to drive the movable frame to lift; the frame is provided with a height adjustment push rod for driving the flattening and cutting assembly to lift.

2. The external wall insulation board cutting device according to claim 1, characterized in that: The front and rear ends of the frame are both provided with air cavities, one end of the air cavity is closed, and the other end is used to introduce the airflow sent out of the negative pressure fan through the pipeline, and the lower end of the frame is provided with an air curtain outlet whose upper end is connected to the air cavity, and the air curtain outlet extends vertically downward or the lower end is slightly inclined inward to form a high-pressure air curtain area at both ends of the pressing part.

3. The external wall insulation board cutting device according to claim 1, characterized in that: The driving mechanism is a rack and pinion mechanism.

4. The external wall insulation board cutting device according to claim 1, characterized in that: An elastic cushion layer is arranged at the lower end of the pressing part.

5. An external wall insulation board cutting device according to any one of claims 1 to 3, characterized in that: A plurality of groups of rotating rollers are rotatably provided at the lower end of the pressing portion, wherein the rotation axes of the rotating rollers extend in the left-right direction and the lower end surfaces thereof protrude from the lower end surface of the pressing portion.

6. The external wall insulation board cutting device according to claim 5, characterized in that: A plurality of groups of first magnets are arranged at intervals along the circumferential direction on the roller surface of the rotating roller, a second magnet is arranged on the knife shaft of the cutting knife, and the polarity of the outer end of the first magnet is the same as that of the outer end of the second magnet.

7. The external wall insulation board cutting device according to claim 6, characterized in that: The chip extraction port also includes a portion arranged between two groups of rotating rollers.

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