Cutting machine with automatic feeding function

Abstract

The application discloses a cutting machine with an automatic feeding function and relates to the field of cutting machines, which comprises a rack, a cutting knife vertically and slidably arranged on the rack, a feeding caterpillar arranged on the upper surface of the rack for feeding, and side walls arranged on both sides of the rack for assembling the cutting knife; a pressing assembly arranged on both sides of the cutting knife, wherein the pressing assembly comprises a pressing block in sliding fit with a U-shaped groove, a rotating shaft fixedly arranged in the pressing block, and a pressing plate rotatably arranged on the rotating shaft. The cutting machine with the automatic feeding function is driven by a same telescopic rod to synchronously drive a rotating plate in the U-shaped groove and a trapezoidal plate of the side wall, and cooperates with a pressing strip on the side edge of a movable plate and a concave-convex clamping structure to synchronously switch the movement track of the upper pressing assembly and the locking or sliding state of the lower caterpillar base according to a thickness detection signal; thin glue corresponds to a low-position rigid flattening mode, and thick glue corresponds to a high-position follow-up cutting mode, and no additional independent driving and step-by-step control are required in the whole process.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, and more specifically to a cutting machine with automatic feeding function. Background Technology

[0002] Cutting machines are key pieces of equipment widely used in the processing of non-metallic materials such as rubber, leather, textiles, and foam materials. Their principle is to use the force of machine motion to press and cut the material using a die. Traditional cutting machines primarily use two methods for feeding material before cutting: magnetic beam feeding and clamping and pulling. In the feeding stage, manual operation is often used, which is cumbersome, labor-intensive, poses safety hazards, and affects overall work efficiency. With the trend towards automation and unmanned operation in industries such as rubber and tires, higher demands are placed on the automatic feeding and precise length cutting performance of cutting equipment.

[0003] Rubber raw materials (especially thin rubber sheets) are typically stored in a rolled-up state for extended periods. In this rolled-up state, the internal stress distribution of the material changes. Maintaining this state for a long time leads to stress concentration, making it difficult for the rubber pad to return to its original flat state after unfolding. Specifically, stable residual bending stress forms within the material, carrying warping potential energy along its width. Even after pre-smoothing treatment at the feed end, the residual stress is immediately released at the moment of cutting, as the two sides of the cut lose their binding force, causing the cut edge to curl upwards, making it difficult to obtain a flat cross-section.

[0004] In existing technologies, hydraulic rods are used to move the cutting assembly, causing the pressure plate to contact the rubber surface and move downwards, stretching the movable frame assembly to tighten and unfold the rubber or leather. Alternatively, electric push rods are used to drive the pressure plates to slide towards each other, and then a cylinder is used to press and fix the two ends of the flexible material to prevent changes in the die-cut shape caused by material wrinkling. Furthermore, some solutions incorporate stress-relief zones between the slitting rollers, allowing the sliddled rubber sheet to recover from its deformation before proceeding to the next cutting stage.

[0005] However, a single pressing method can only constrain the apparent deformation of the material and cannot effectively eliminate the inherent curling stress and local relaxation inside the roll material. The problem of edge rebound at the moment of cutting has not been effectively solved. Furthermore, for thick rubber raw materials, lateral plastic flow is likely to occur when squeezed by the blade, and shear cracks are likely to deviate along the internal defects of the material, causing the cut to be tilted, which is difficult to deal with by traditional rigid pressing. Summary of the Invention

[0006] The purpose of this invention is to provide a cutting machine with automatic feeding function to solve the above-mentioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cutting machine with automatic feeding function, including a frame and a cutting blade vertically slidably arranged on it, the upper surface of the frame is provided with a feeding conveyor for feeding and the two sides of the frame are provided with side walls for assembling the cutting blade, including an I-shaped groove formed on the side wall;

[0008] A pressing assembly is provided on both sides of the cutting blade. The pressing assembly includes a pressing block that slides with a groove. A rotating shaft is fixedly provided inside the pressing block and a pressure plate is rotatably provided through the rotating shaft. A half gear is fixedly provided at the end of the rotating shaft.

[0009] The first end of the pressure plate is rotatably equipped with a pressing wheel, and the second end slides in conjunction with a limiting cavity opened in the pressing block to switch between inclined and horizontal states.

[0010] It also includes a sliding box that is vertically slidably disposed on the side wall and slidably connected to the pressure plate in the horizontal direction, wherein a first spring for pressing against the pressure plate is provided in the sliding box.

[0011] Preferably, the tool also includes a blade holder fixedly disposed at both ends of the cutting blade, wherein a pressing block is fixedly disposed at the bottom of the blade holder, and a slope that slides with the pressing block is disposed at the top of the pressing block.

[0012] Preferably, the pressure plate is provided with a tension spring, and the angle between the centerline of the pressure plate and the axis of the tension spring is less than 10° when the plate is horizontal.

[0013] Preferably, the rotating shaft moves synchronously with the pressing wheel;

[0014] It also includes a rotating plate that is rotatably installed inside the U-shaped groove, which is used to restrict the U-shaped groove into two parts: a high position and a low position;

[0015] The sidewall is provided with a rack and a crossbar at the high and low positions, respectively, which mate with the end of the rotating shaft.

[0016] Preferably, the pressure plate includes swing arms disposed on both sides of the pressing wheel, a drive wheel is rotatably disposed on the swing arm and the drive wheel has a transverse groove that slides with the pressing wheel, and the drive wheel is connected to the rotating shaft via a transmission belt.

[0017] Preferably, it also includes a moving rail for driving the rotating plate, which is slidably mounted on the side wall in a vertical direction.

[0018] Preferably, a fixed plate is linearly fixed on the feeding track, a movable plate is movably mounted on the fixed plate, and a trapezoidal plate for pressing against the movable plate is fixed on the moving rail.

[0019] Preferably, the movable plate is provided with a suction port for adsorbing raw material.

[0020] Preferably, the side of the feeding track is fixedly provided with a fixed frame, and a suction channel is formed between two adjacent movable plates that communicates with the inside of the fixed frame.

[0021] In the above technical solution, the cutting machine with automatic feeding function provided by the present invention has the following beneficial effects: 1. The present invention synchronously drives the rotating plate in the C-shaped groove and the trapezoidal plate on the side wall by relying on the same telescopic rod, and with the pressure strip and concave-convex interlocking structure on the side of the movable plate, the movement trajectory of the upper pressing component and the locking or sliding state of the lower track base can be switched synchronously according to the thickness detection signal; thin rubber corresponds to the low-position rigid leveling mode, and thick rubber corresponds to the high-position follow-up cutting mode, without the need for additional independent driving and step-by-step control throughout the process;

[0022] 1. In the thin rubber mode of this invention, the movable plate is locked as a rigid whole. With the combined tensioning action of the upper pressing rollers first converging towards each other and then flattening outwards, the rubber is clamped between the rigid pressing rollers and the rigid movable plate. The tension force has no attenuation or unloading, which can fully offset the residual bending internal stress formed by the long-term winding of the thin rubber, significantly suppress the instantaneous edge curling of the cut, and at the same time ensure the repeatability and positioning accuracy of the cut size.

[0023] 2. In the thick rubber mode of this invention, when the upper pressing wheel tensions the rubber surface layer, the rubber relies on negative pressure adsorption and static friction to drive the movable plate to move outward synchronously. The material as a whole moves with the tensioning force, avoiding interlayer shear deformation of traditional fixed base, reducing micro-crack defects in the subsurface layer of the cut from the mechanical source, and significantly improving the fatigue resistance and structural integrity of the thick rubber product.

[0024] 3. The gap between adjacent movable plates, the rubber bottom surface, and the suction cavity of the side fixed frame together form a sealed negative pressure space. This space is always directly facing the negative pressure center, and the cutting debris can be sucked into the filter screen inside the fixed frame for interception at zero distance. At the same time, the concave strips on the adjacent end faces of the movable plates correspond to the position of the cutting edge, which not only provides the cutting blade with downward avoidance space and avoids the cutting edge hitting the substrate and breaking it, but also serves as a confluence channel to enhance the suction effect. It has two uses and a high degree of structural reusability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the frame provided in an embodiment of the present invention;

[0028] Figure 3 A side view of the pressing assembly and feeding track provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the pressing component structure provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the trapezoidal plate and rotating plate structure inside the side wall provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the pressing block and pressure plate structure provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the initial state of the inverted groove and the moving state of the pressing block provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the incised groove and pressing block in a thick rubber state, provided in an embodiment of the present invention.

[0034] Figure 9 This is a schematic diagram of the pressure plate and drive wheel structure provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the feeding track and fixing plate structure provided in an embodiment of the present invention;

[0036] Figure 11 Provided for embodiments of the present invention Figure 10 Enlarged schematic diagram of structure A in the middle.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Frame; 11. Side wall; 111. C-groove; 111a. First position; 111b. Second position; 111c. Third position; 111d. Fourth position; 112. Rack; 113. Crossbar; 12. Protective box; 13. Drive shaft; 14. Sliding box;

[0039] 2. Knife holder; 21. Cutting knife; 22. Pressing block;

[0040] 3. Pressing assembly; 31. Pressing block; 311. Inclined surface; 312. First spring; 32. Limiting cavity; 33. Protrusion; 34. Rotating shaft; 341. Tension spring; 342. Half gear; 35. Pressure plate; 351. Rocker arm; 352. Pressing wheel; 353. Drive wheel; 354. Horizontal groove; 355. Transmission belt;

[0041] 4. Feeding track; 41. Fixed plate; 42. Movable plate; 421. Pressure strip; 43. Suction port; 431. Suction channel; 432. Recessed strip; 44. Fixed frame; 441. Filter screen; 45. Elastic element;

[0042] 5. Moving rail; 51. Turning plate; 52. Trapezoidal plate; 53. Telescopic rod;

[0043] 100. Rubber raw materials; 200. Thickness sensing element. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] like Figure 1-11 As shown, a cutting machine with automatic feeding function includes a frame 1 and a vertically sliding cutting blade 21 on it. The upper surface of the frame 1 is provided with a feeding conveyor 4 for feeding, and side walls 11 for mounting the cutting blade 21 are provided on both sides of the frame 1. Blade holders 2 are fixedly mounted at both ends of the cutting blade 21. A drive shaft 13 is rotatably mounted on the frame 1. The drive shaft 13 can be driven by a drive motor or sprocket structure, and the drive shaft 13 is linked to the blade holders 2 via a connecting rod, so that the rotation of the drive shaft 13 drives the blade holders 2 and the cutting blade 21 to reciprocate vertically for cutting. A cutting tool is also fixedly mounted on the side wall 11. The protective box 12 used to protect the blade holder 2 and the cutting blade 21 (the above technology is a conventional technical setting, and the structure and linkage method are common technical knowledge, which will not be described in detail here) includes an incline groove 111 opened on the side wall 11; it also includes rubber raw material 100. The feed end of the cutting machine is provided with a long strip pressure plate in the horizontal direction to initially smooth the rubber raw material 100. The bottom of the long strip pressure plate cooperates with the feeding conveyor 4 to form a constant passage gap, so as to perform the first pre-flattening of the rubber raw material 100 in the winding state, eliminate the large curvature wrinkles and curling edges on the surface, and provide a stable material base for the fine flattening of the subsequent station;

[0046] The pressing components 3 are arranged on both sides of the cutting blade 21. The pressing components 3 include pressing blocks 31 that slide with the groove 111. A protrusion 33 that slides in the groove 111 is fixedly arranged on the pressing block 31. A rotating shaft 34 is fixedly arranged inside the pressing block 31 and a pressure plate 35 is rotatably arranged through the rotating shaft 34. The pressure plate 35 can move relative to the rotating shaft 34. A half gear 342 is fixedly arranged at the end of the rotating shaft 34.

[0047] A pressing roller 352 is rotatably mounted on the first end of the pressure plate 35. The outer circumference of the pressing roller 352 is covered with a high-friction coefficient wear-resistant polyurethane layer, which ensures both gripping force on the rubber surface and no relative slippage during stretching, while also preventing rigid indentations from being left on the rubber surface. Furthermore, the pressing roller 352 and the pressure plate 35 are interference-fitted to provide rotational damping. The second end of the pressing roller 352 slides into a limiting cavity 32 within the pressing block 31 to switch between inclined and horizontal states (the structure of the limiting cavity 32 is as follows). Figure 4 (as shown)

[0048] It also includes a sliding box 14 that is vertically slidably disposed on the side wall 11 and horizontally connected to the pressure plate 35, and a first spring 312 for pressing the pressure plate 35 is provided inside the sliding box 14.

[0049] Specifically, a pressing block 22 is fixedly installed at the bottom of the blade holder 2, and a sloping surface 311 is provided on the top of the pressing block 31 to slide in cooperation with the pressing block 22. That is, when the cutting blade 21 cuts, the cutting blade 21 will drive the blade holder 2 to move downward, causing the pressing block 22 to press down on the sloping surface 311 and drive the pressing block 31 as a whole downward. Figure 7 As shown, the protrusion 33 is initially located at the first position 111a of the groove 111. The protrusion 33 is restricted by the groove 111. Due to the first spring 312 between the pressing block 31 and the sliding box 14, the pressing block 31 is pushed against the pressing block 22. When the pressing block 22 moves downward, it causes the pressing block 31 to move only vertically downward to the second position 111b. Subsequently, the restriction of the groove 111 changes from vertical to horizontal. When the pressing block 22 continues to move downward, it will squeeze the pressing block 31 through the action of the inclined surface 311, causing the pressing block 31 to slide to both sides and overcome the elasticity of the first spring 312. The pressing block 31 reaches the third position 111c. That is, during the downward movement of the cutting blade 21, the pressing block 31 will first move downward and then slide horizontally to both sides. Furthermore, a tension spring 341 is provided on the pressure plate 35. One end of the tension spring 341 is hooked to the hanging point in the middle of the pressure plate 35, and the other end is hooked to the fixed hanging shaft on the inner wall of the pressing block 31. In the initial state, it is in a pre-stretched state. The centerline of the pressure plate 35 is flush with the axis of the tension spring 341 in a horizontal state. In the initial state, the second end of the pressure plate 35 is restricted by the arc surface of the inner wall of the limiting cavity 32, and the first end is held in an inclined state by the tension spring 341. During the downward movement of the pressing block 31, the pressing roller 352 at the first end of the pressure plate 35 will contact the upper surface of the rubber material 100. Subsequently, the pressing roller 352 and the pressure plate 35 are flipped upward by the reaction force (e.g., Figure 7As shown in Figure b), during the flipping process, the pressing rollers 352 continuously press against the surface of the rubber material 100. As the pressure plate 35 flips, the pressing rollers 352 on both sides move towards the central axis, i.e., towards the working area of ​​the cutting blade 21. This movement causes the pressing rollers 352 to slightly pull the rubber material 100 towards the center, while the tension spring 341 stores force. It is worth emphasizing that the pressing rollers 352 on both pressure plates 35 are as follows... Figure 6 The staggered comb-like arrangement shown ensures that even when both pressing wheels 352 on both sides are rotated to a horizontal position, there will be no interference between them.

[0050] This forces the pressure plate 35 to switch to a horizontal state. In this horizontal state, the center line of the pressure plate 35 is the line connecting the axis of the pressing roller 352 and the axis of the rotating shaft 34. The angle between this center line and the axis is less than 10°, so that the pressure plate 35 always has a downward tendency in the horizontal state, and drives the pressing roller 352 to continuously abut against the upper surface of the rubber material 100. This allows the pressing roller 352 to have a slight floating margin, which can adapt to the slight thickness deviation and local undulation of the thin rubber, and will not cause indentation by hard pressing like a rigid dead point lock. At the same time, the continuous downward pressure can keep the wheel surface in close contact with the rubber surface. Subsequently, as the pressing plate 31 moves to both sides, it drives the pressing plate 35 and the pressing roller 352 to move to both sides, flattening the rubber that initially moved towards the working area of ​​the blade in the previous steps. Finally, the cutting blade 21 cuts this part of the rubber material 100 that has first slightly moved towards the cutting area and then flattened it. The stroke of the pressing roller 352 flattening to both sides is strictly matched with the downward depth of the cutting blade 21. Because thin rubber is stored in a rolled-up state for a long time, stable residual bending internal stress will form inside the material. The material has an upward warping potential along the width direction. Even if it is pre-flattened at the feeding end, at the moment of cutting, the two sides of the cut lose the connection constraint, and the residual stress will be released immediately, causing the cut edge to curl upward and making it impossible to obtain a flat cross-section. However, in this invention, through transverse bidirectional movement, the bending internal stress formed by winding is converted into uniform tension stress, actively flattening the relaxation and warping tendency inside the material. Compared to single pressing which can only constrain apparent deformation, this composite tensioning can deeply weaken the rebound force, and the amount of curling at the moment of cutting can be greatly reduced.

[0051] In the aforementioned technology, before the cutting blade 21 contacts the rubber, the pressing roller 352 has completed the entire process of converging towards each other and flattening outwards, uniformly tensioning and flattening the rubber in the cutting area along the width direction, eliminating the inherent curling stress and local relaxation of the roll material. When the blade cuts into the rubber, the pressing roller 352 has already retreated to a safe distance on both sides of the blade edge, both constraining the material around the cut edge throughout the entire process and completely avoiding the cutting path, without interfering with the blade operation. It also continuously constrains both sides of the cut edge at the instant of cutting, preventing the curling stress from being suddenly released and warping at the moment the material breaks. Compared with the problem of uncontrolled springback at the moment of cutting that often occurs in traditional pressing materials, this structure ensures that the area around the cut edge is held and constrained throughout the entire process through mechanical trajectory, avoiding the window for edge curling.

[0052] like Figures 4-9 As shown, in a further embodiment of the present invention, the rotating shaft 34 and the pressing wheel 352 move synchronously;

[0053] It also includes a rotating plate 51 rotatably disposed within the incline groove 111, which is used to restrict the incline groove 111 into two parts: a high position and a low position;

[0054] The side wall 11 is provided with a rack 112 and a crossbar 113 at the high and low positions, respectively, which cooperate with the end of the rotating shaft 34.

[0055] Specifically, the pressure plate 35 includes swing rods 351 disposed on both sides of the pressing wheel 352. A drive wheel 353 is rotatably disposed on the swing rod 351, and a transverse groove 354 is provided on the drive wheel 353 to slide with the pressing wheel 352. The drive wheel 353 is connected to the rotating shaft 34 through a transmission belt 355. The drive wheel 353 is not concentric with the pressing wheel 352. When the drive wheel 353 rotates, it drives the transverse groove 354 to swing, so that the pressing wheel 352 swings slightly under the drive.

[0056] Furthermore, a thickness sensor 200 is provided at the bottom of the long strip pressure plate set upstream of the cutting work. This sensor can be a pressure sensor or an infrared detector to detect the thickness of the rubber material 100 and send a signal when the rubber material 100 is too thick. It also includes a moving rail 5 for driving the rotating plate 51, which is driven to slide vertically on the side wall 11. The side wall 11 is also provided with a telescopic rod 53. In the initial state, that is, when the rubber material 100 is relatively thin, the telescopic rod 53 does not receive a signal and is in a low position, so that the rotating plate 51 is in a vertical state. At this time, the C-shaped groove 111 is restricted by the rotating plate 51 and only retains the L-shaped groove structure. The horizontal groove at the top of the C-shaped groove 111 is blocked, so that the protrusion 33 can only move along the L-shaped groove structure. This trajectory corresponds to the low position part. Then the protrusion 33 moves from the first position 111a to the second position 111b. During this process, the rotating shaft 34 moves to the corresponding crossbar 113. Since the end of the rotating shaft 34 is a half gear 342 structure, the rotating shaft 34 and the crossbar 113 move together. During the contact process of the rods 113, the rotating shaft 34 deflects and is restricted by the crossbar 113, thus restricting the half gear 342 to a horizontal state. At this time, the corresponding drive wheel 353 rotates and drives the pressing wheel 352 to swing slightly. That is, during the pressing of the pressing block 31, in addition to the overall deflection towards the working area of ​​the blade and the interlocking structure between them, the pressing wheel 352 also has a small swing adjustment process when it is in place. After the pressure plate 35 is in a horizontal state, the pressing block 31 is squeezed to both sides by the pressing block 22, and the pressing wheel 352 is simultaneously separated to both sides. At this time, the rotating shaft 34 is completely in contact with the crossbar 113 and its rotation is restricted, so that the pressing wheel 352 is prohibited from rotating and switches to a rigid clamping state, and is stretched and flattened outward at a uniform speed with the pressing block 31. The cutting blade 21 cuts into the rubber after the pressing wheel 352 has completed the tensioning.

[0057] When the rubber raw material 100 is thick, the thick rubber is prone to lateral plastic flow due to the pressure of the blade, and the shear crack is prone to deviate along the internal defects of the material, causing the cut to be tilted. At this time, it is necessary to send a signal to the telescopic rod 53 through the thickness sensor 200. After receiving the signal, the telescopic rod 53 drives the moving rail 5 to move upward, so that the rotating plate 51 deflects to the horizontal state. At this time, the L-shaped groove at the bottom of the C-shaped groove 111 is blocked, leaving only the horizontal groove at the top for the protrusion 33 to move. The pressing block 31 will first move in the horizontal direction, from the first position 111a to the fourth position 111d, and will not first press the pressure plate 35. The rotating shaft 34 meshes with the rack 112 located at the high position through the half gear 342. During the movement of the pressing block 31 in the horizontal direction, the rotating shaft 34 is forced to rotate and drives the drive wheel 353 to rotate through the transmission belt 355. The drive wheel 353 drives the pressing wheel 352 to swing back and forth, and at the same time the pressing block 31 and the pressure plate 35 move to both sides of the blade working area.

[0058] The outward movement and oscillation of the pressure roller 352 create continuous reciprocating shear disturbances on the thick rubber surface on both sides of the cut, pre-dispersing the uneven residual internal stress within the material and simultaneously applying a directional outward tension to the surface material. When the blade subsequently cuts in, the plastic flow of the material to both sides is pre-canceled, allowing the blade to maintain a purely vertical shearing state. This significantly improves the perpendicularity of the cut, avoiding the material being squeezed and arched under traditional rigid pressing, which leads to cut deviation. Furthermore, the small reciprocating oscillation creates a uniform directional micro-strain field in the cut area, ensuring that the initial shear crack generated at the moment of blade entry propagates strictly along the cutting plane and does not deviate along the fiber direction within the material. Simultaneously, the frictional heat generated during thick rubber cutting facilitates the formation of a continuous adhesive layer on the cross-section of the molten rubber at high temperatures. The reciprocating oscillation of the pressing roller 352 causes a slight relative slippage between the roller surface and the rubber surface, which can continuously disrupt the continuity of the newly formed molten adhesive layer and prevent large-area adhesion of the adhesive layer; at the same time, the horizontal outward movement of the pressing block 31 continuously pushes the two sides of the cut outward, and the high-temperature section that has just been cut is physically separated in time.

[0059] like Figures 10-11 As shown, in a further embodiment of the present invention, a fixed plate 41 is linearly fixedly arranged on the feeding conveyor 4, a movable plate 42 is movably arranged on the fixed plate 41, and a trapezoidal plate 52 for pressing against the movable plate 42 is fixedly arranged on the moving rail 5, wherein the length of the trapezoidal plate 52 covers the length of the cutting station. The fixed plate 41 and the movable plate 42 are slidably connected in the horizontal direction, and a pressure strip 421 is slidably arranged on the side of the movable plate 42 in the vertical direction. An elastic member 45 is arranged between the pressure strip 421 and the movable plate 42, and the elastic member 45 is used to support the pressure strip 421 at a high position. The top surface of the fixed plate 41 and the bottom surface of the pressure strip 421 are provided with concave and convex structures (such as staggered teeth, dotted bosses and grooves) so that they can engage with the fixed plate 41 after the pressure strip 421 moves downward.

[0060] Specifically, the movable plate 42 has a suction port 43 for adsorbing raw materials. A fixed frame 44 is fixedly installed on the side of the feeding conveyor 4. The fixed frame 44 is a semi-enclosed hollow structure, and its opening abuts against the side of the movable plate 42 and remains sealed. This can be achieved by setting a rubber or labyrinth seal structure at the opening. The fixed frame 44 is connected to a negative pressure source, and a filter screen 441 can be installed inside the fixed frame 44 to prevent the suction debris from being sucked into the negative pressure source. A suction channel 431 is formed between two adjacent movable plates 42 and communicates with the inside of the fixed frame 44. The suction channel 431 is opened on the opposite side wall between the two movable plates 42 and communicates with the suction port 43.

[0061] Furthermore, when the rubber raw material 100 is relatively thin, the telescopic rod 53 is in a low position without receiving a signal, and the trapezoidal plate 52 is in a low position and covers both sides of the cutting station, so that the trajectory of the feeding track 4 coincides with the trapezoidal plate 52. When the feeding track 4 reaches the cutting station, the top surface of the pressure strip 421 abuts against the side of the trapezoidal plate 52 and is guided downward by the side. At this time, the elastic element 45 contracts and stores force, and the pressure strip 421 is pressed against the upper surface of the fixed plate 41, so that the concave and convex structures are interlocked, and the movable plate 42 is locked and can no longer move horizontally. When the upper pressing wheel 352 performs the compound tensioning action, the lower movable plate 42 is completely locked and fixed, and the rubber is clamped between the upper pressing wheel 352 and the lower rigid movable plate 42. The tensioning force is completely applied to the rubber material itself, and there will be no slippage due to the base slippage. This can maximize the offsetting of the residual bending internal stress formed by the long-term winding of thin rubber, and the edge curling suppression effect at the moment of cutting is optimal.

[0062] When the rubber raw material 100 is relatively thick, the telescopic rod 53 drives the trapezoidal plate 52 to a high position. At this time, the trapezoidal plate 52 will not interfere with the pressure strip 421, allowing the movable plate 42 to slide horizontally relative to the fixed plate 41. When the upper pressing roller 352 drives the rubber surface to move outward to both sides for tensioning, the rubber bottom layer relies on friction to drive the movable plate 42 to slide horizontally along the fixed plate 41 synchronously. The material as a whole moves synchronously with the tensioning force, and there is no interlayer shear deformation where the upper layer moves while the bottom layer sticks to the feeding track 4. This eliminates the subsurface microcrack defects caused by interlayer misalignment during the cutting of thick rubber from the root.

[0063] During the horizontal sliding of the movable plate 42, the gap between adjacent movable plates 42 remains connected to the suction cavity of the side fixed frame 44. The negative pressure adsorption continuously acts on the bottom surface of the rubber, allowing the material to move horizontally while ensuring that the material does not arch vertically, thus preventing it from detaching from the track. At this time, a sealed space is formed between the gap between the two movable plates 42 and the bottom surface of the rubber raw material 100. The size of this sealed space is synchronized with the amount of movement of the pressing roller 352 to both sides. Furthermore, recessed strips 432 are provided on the adjacent surfaces of the movable plates 42 to receive the cutting edge of the cutting blade 21, preventing the cutting edge from cutting into the surface of the movable plate 42. The position of the recessed strips 432 is consistent with the aforementioned sealed space. In this context, when the pressing roller 352 pulls the rubber material 100 to both sides, it will cause the distance between the movable plates 42 at the bottom to increase slightly. At the initial stage of cutting, when the blade has not cut in, the distance between the movable plates 42 is the smallest, and the sealed space is narrow and concentrated. As the blade gradually cuts in and the pressing roller 352 gradually extends outward, the distance between the movable plates 42 expands synchronously. The sealed space always expands symmetrically to both sides with the blade edge as the center. The cutting position of the blade edge is always directly opposite the center of the sealed negative pressure space. The strongest area of ​​negative pressure suction always moves precisely with the cutting point. The debris generated during the cutting process will be directly absorbed into the suction channel 431 and intercepted by the filter screen 441 of the fixed frame 44. As soon as the rubber debris and high-temperature molten rubber particles generated during cutting detach from the parent material, they fall directly into the negative pressure sealed space directly below. They will not adhere to the cutting edge surface, thus aggravating tool wear, nor will they fall onto the track surface, affecting the flatness of subsequent material adsorption. Furthermore, the sealed space is self-sealed by the rubber bottom surface, with no additional leakage gaps around it. All the suction airflow is concentrated in the cutting area, which can effectively suck up large rubber particles and viscous molten rubber generated from cutting thick rubber.

[0064] After being sucked up, the debris enters the side fixing frame 44 with the airflow and is intercepted and retained by the filter 441 integrated inside the frame. Only the filter 441 needs to be cleaned periodically, which will not contaminate the subsequent air circuit components and makes maintenance simple.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cutting machine with automatic feeding function, comprising a frame (1) and a cutting blade (21) vertically slidably mounted thereon, wherein a feeding conveyor (4) for feeding is provided on the upper surface of the frame (1) and side walls (11) for mounting the cutting blade (21) are provided on both sides of the frame (1), characterized in that, Including the C-shaped groove (111) opened on the side wall (11); The pressing components (3) are arranged on both sides of the cutting blade (21). The pressing components (3) include pressing blocks (31) that slide with the groove (111). A rotating shaft (34) is fixedly arranged inside the pressing block (31) and a pressure plate (35) is rotatably arranged through the rotating shaft (34). A half gear (342) is fixedly arranged at the end of the rotating shaft (34). The first end of the pressure plate (35) is rotatably provided with a pressing wheel (352), and the second end slides into the limiting cavity (32) opened in the pressing block (31) to switch between tilted and horizontal states; It also includes a sliding box (14) that is slidably disposed on the side wall (11) in the vertical direction and slidably connected to the pressure plate (35) in the horizontal direction, wherein a first spring (312) for pressing the pressure plate (35) is provided in the sliding box (14).

2. A cutting machine with automatic feeding function according to claim 1, characterized in that, It also includes a blade holder (2) fixedly installed at both ends of the cutting blade (21), with a pressing block (22) fixedly installed at the bottom of the blade holder (2), and a slope (311) that slides with the pressing block (22) on the top of the pressing block (31).

3. A cutting machine with automatic feeding function according to claim 1, characterized in that, A tension spring (341) is provided on the pressure plate (35), and the angle between the center line of the pressure plate (35) and the axis of the tension spring (341) is less than 10° when the plate is horizontal.

4. A cutting machine with automatic feeding function according to claim 1, characterized in that, The rotating shaft (34) moves synchronously with the pressing wheel (352); It also includes a rotating plate (51) rotatably disposed within the incline groove (111), which is used to restrict the incline groove (111) into two parts: a high position and a low position; The sidewall (11) is provided with a rack (112) and a crossbar (113) that cooperate with the end of the rotating shaft (34) at the high position and the low position, respectively.

5. A cutting machine with automatic feeding function according to claim 4, characterized in that, The pressure plate (35) includes a swing arm (351) disposed on both sides of the pressing wheel (352). A drive wheel (353) is rotatably disposed on the swing arm (351), and a transverse groove (354) is provided on the drive wheel (353) to slide with the pressing wheel (352). The drive wheel (353) is connected to the rotating shaft (34) through a transmission belt (355).

6. A cutting machine with automatic feeding function according to claim 4, characterized in that, It also includes a moving rail (5) for driving the rotating plate (51), which is slidably mounted on the side wall (11) in the vertical direction.

7. A cutting machine with automatic feeding function according to claim 6, characterized in that, A fixed plate (41) is linearly fixed on the feeding track (4), a movable plate (42) is movably disposed on the fixed plate (41), and a trapezoidal plate (52) for pressing against the movable plate (42) is fixed on the moving rail (5).

8. A cutting machine with automatic feeding function according to claim 1, characterized in that, The movable plate (42) is provided with a suction port (43) for adsorbing raw materials.

9. A cutting machine with automatic feeding function according to claim 8, characterized in that, The feeding conveyor (4) has a fixed frame (44) fixedly installed on its side, and a suction channel (431) is formed between two adjacent movable plates (42) that communicates with the inside of the fixed frame (44).

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