A non-vibration shearing buffer device for a water gap shearing machine

Abstract

The application provides a kind of water gap shearing machine vibration-free shearing buffer equipment, including: the bottom surface of shearing table is provided with workbench, and the top surface is provided with shell, the bottom corner of shearing table is provided with limit post, the bottom surface of limit post is provided with spring, limit post and spring are inserted into workbench movably;First buffer mechanism is arranged on the bottom surface of shearing table, first buffer mechanism includes semicircle body and four prism, semicircle body is provided with air pressure cavity, air pressure cavity is used to buffer when shearing table is pressed down, four prism is arranged in the air pressure cavity of semicircle body;Second buffer mechanism is arranged on the shell, second buffer mechanism includes gear and elastic piece, gear side is fixed with one end of elastic piece, and the other end of elastic piece is fixedly connected to the shell, gear is rotatably connected with shearing knife, elastic piece is used to buffer shearing force suddenly generated when shearing knife is pressed down.The application has the advantages of vertical shock absorption, limit position, stability improvement, air pressure balance reset, negative pressure avoidance, gear transmission, flexible buffer and collision prevention.

Description

Technical Field

[0001] This invention relates to the field of shearing, and in particular to a vibration-free shearing buffer device for a sprue cutter. Background Technology

[0002] The core function of injection molding gate shearing is to absorb impact energy and eliminate mechanical vibration during the shearing process. Through a built-in hydraulic or elastic buffer system, it allows the cutter to contact and cut the gate in a flexible manner, avoiding workpiece chipping, deformation, or surface scratches caused by rigid impact.

[0003] In related technologies, Chinese patent document CN208180157 discloses a sprue cutting machine. This machine consists of a frame sprue cutting mechanism and a lower support base. The support base has a cutting slot with a receiving blade, and the workpiece is placed above the receiving blade. A cylinder drives a positioning plate downwards via a positioning block. The end face of the rubber head is lower than the end of the cutter and will contact the workpiece first. The clamping column is pressed upwards, compressing the second spring, relying on the spring force to press and fix the workpiece, preventing cutting displacement. Subsequently, the cutter contacts the sprue. Initially, the plastic resistance compresses the first spring, slowing the cutter and alleviating material extrusion and deformation. After the spring force overcomes the resistance, it continues to cut downwards. At the end of the cut, the resistance decreases sharply, and the spring force, combined with the downward thrust, quickly cuts off the remaining material. The cutter is limited to the rotating block's limiting groove, allowing only up and down movement, forming a shearing force with the receiving blade to complete the sprue removal. This slow-then-fast cutting method eliminates cutting marks on the surface of the plastic workpiece.

[0004] However, this method has obvious drawbacks. When the cylinder presses down and the cutter cuts at high speed, the impact force is large, the whole machine vibrates and makes noise, and there is a lack of buffering and noise reduction. Summary of the Invention

[0005] The main objective of this invention is to provide a vibration-free shearing buffer device for a sprue cutter, thereby solving the vibration problem during sprue cutter operation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a vibration-free shearing buffer device for a sprue cutter, comprising: A shearing table, wherein the bottom surface of the shearing table is provided with a worktable and the top surface is provided with a housing, and each bottom corner of the shearing table is provided with a limiting post, and the bottom surface of the limiting post is provided with a spring, and the limiting post and the spring are movably inserted into the worktable; The first buffer mechanism is located on the bottom surface of the shearing table. The first buffer mechanism includes a semicircle and a quadrangular prism. The semicircle is provided with a pneumatic cavity, which is used to buffer the shearing table when it is pressed down. The quadrangular prism is located in the pneumatic cavity of the semicircle. The second buffer mechanism is disposed on the housing. The second buffer mechanism includes a gear and an elastic element. One end of the elastic element is fixed to one side of the gear, and the other end of the elastic element is fixedly connected to the housing. The gear is rotatably connected to a shearing blade. The elastic element is used to buffer the sudden shearing force when the shearing blade is pressed down.

[0007] Preferably, the shearing table is provided with connecting rods on both sides, and a slider is movably connected to the other end of the connecting rod. The top surface of the worktable is provided with multiple convex grooves spaced apart. The slider is slidably disposed in the convex grooves, and a damping is provided on the side of the slider opposite to the convex groove.

[0008] Preferably, the top surface of the workbench is provided with multiple limiting grooves, and limiting posts are movably inserted into the limiting grooves. Both ends of the spring are provided with cylindrical bosses, and the boss at the top of the spring abuts against the limiting posts.

[0009] Preferably, the first buffer mechanism includes a buffer pad and a stabilizing ring, wherein the bottom surface of the buffer pad and the semicircular body are integrally formed, and the top surface of the stabilizing ring is integrally formed on the bottom surface of the semicircular body.

[0010] Preferably, the shearing blade has rectangular holes spaced apart, the housing has two first mounting slots and a second mounting slot spaced apart, the second mounting slot is located between the first mounting slots, and the top surfaces of the two first mounting slots are each provided with a second limiting hole spaced apart.

[0011] Preferably, the side wall of the semicircular body is provided with a through hole that communicates with the air pressure cavity. The through hole is used to draw in outside air after the air pressure cavity is compressed, so that the semicircular body can be reset.

[0012] Preferably, the top surface of the buffer pad is provided with multiple connecting grooves spaced apart, and the bottom surface of the shearing table is provided with multiple connecting posts spaced apart, with the connecting posts respectively fitted into the connecting grooves.

[0013] Preferably, the second buffer mechanism includes a rack and a connecting shaft. The rack is disposed on the side of the rectangular hole, and the gear meshes with the rack. The connecting shaft is rotatably disposed on the housing and passes through the first mounting groove and the second mounting groove. The gear is rotatably disposed on the connecting shaft.

[0014] Preferably, one end of the elastic element is fixedly connected to the connecting shaft, and the other end is fixedly connected to the second mounting groove. The top surface of the first mounting groove is provided with a silicone pad, which is used to buffer the shearing stress of the shearing blade. The elastic element is arranged in a coiled manner.

[0015] Preferably, each of the silicone pads is provided with a first limiting hole spaced apart, and each of the top surfaces of the first mounting grooves is provided with a second limiting hole spaced apart. Each of the first limiting holes and the second limiting holes is aligned and a square rod is slidably provided thereon, and the bottom surface of the square rod is fixedly connected to the shearing blade.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The shearing table is connected to the worktable by limiting posts and springs, and together with the bottom pneumatic buffer mechanism, it can achieve vertical shock absorption and precise positioning, effectively absorb vertical vibration, and improve the overall structural stability; 2. The pneumatic cavity draws in outside air through the side wall through-holes to achieve internal and external pressure balance, assisting the semi-circular body to return to its stable state, avoiding the problems of negative pressure blockage and shear table vibration, and improving the response speed and cycle stability of the buffer mechanism; 3. The rack and pinion meshing transmission converts the linear motion of the shearing blade into gear rotation. The coiled elastic element absorbs instantaneous shear stress through torsional deformation, achieving flexible buffering and avoiding rigid collision between the blade and the housing. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a cross-sectional view of the shearing table and a structural diagram of the housing of the present invention; Figure 3 This is the present invention. Figure 2 Structural diagram of A in the middle; Figure 4 This is a structural diagram of the second buffer mechanism of the present invention; Figure 5 This is a structural diagram of the limiting post, spring, and boss of the present invention; Figure 6 This is a structural diagram of the first buffer mechanism of the present invention; Figure 7 This is a structural diagram of the semicircular body and the quadrangular prism of the present invention.

[0018] In the diagram: 1. Shearing table; 101. Placement slot; 102. Circular slot; 103. Blade slot; 2. Worktable; 201. Convex slot; 202. Limiting slot; 3. Shearing blade; 301. Rectangular hole; 4. Slider; 5. Limiting post; 6. Spring; 7. Boss; 8. Connecting post; 9. Damping; 10. Connecting rod; 11. First buffer mechanism; 1101. Buffer pad; 1102. Connecting slot; 1103. 1104. Semicircular body; 1105. Through hole; 1106. Quadrilateral prism; 1107. Stable ring; 12. Second buffer mechanism; 1201. Rack; 1202. Gear; 1203. Connecting shaft; 1204. Elastic element; 1205. Silicone pad; 12051. First limiting hole; 13. Housing; 1301. First mounting groove; 1302. Second mounting groove; 1303. Second limiting hole; 14. Square rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The following is in conjunction with the appendix Figures 1 to 7 This application will be described in further detail. Example

[0021] Embodiment 1 of this application provides a vibration-free shearing buffer device for a sprue cutter.

[0022] The top surface of the shearing table 1 is machined with a placement groove 101 for placing the injection product. There is one longitudinal groove 101 and multiple transverse grooves at intervals. A circular groove 102 is machined in the middle of the longitudinal placement groove 101. The placement groove 101 and the circular groove 102 are used to place the gate. Cutting grooves 103 are machined at intervals on both sides of the longitudinal placement groove 101. The cutting grooves 103 ensure that the shearing blade 3 is not damaged when cutting the gate. The bottom surface of the shearing table 1 is firmly connected to the worktable 2, and a housing 13 is provided on the top side. The overall structure is compact and reliably supported. Vertical limiting posts 5 are provided at the four bottom corners of the shearing table 1. Springs 6 are fitted to the bottom ends of the limiting posts 5, and both are inserted into the corresponding holes in the worktable 2 in a movable plug-in manner. This design not only achieves precise positioning and limiting of the shearing table 1, but also absorbs vertical vibrations during equipment operation, effectively reducing the impact on the worktable 2 and improving overall stability.

[0023] The bottom surface of the shearing table 1 is also equipped with a first buffer mechanism 11, which consists of a semi-circular body 1103 and a quadrangular prism 1105. The semi-circular body 1103 has a sealed pneumatic cavity inside. When the shearing table 1 is subjected to downward pressure, the gas inside the pneumatic cavity is compressed, forming a flexible buffer to prevent damage to the equipment from rigid impacts. The quadrangular prism 1105 is placed inside the pneumatic cavity, serving as a guide and support, ensuring a smooth and controllable buffering process, while also enhancing the overall pressure resistance of the mechanism. The quadrangular prism 1105 has a gradually decreasing cross-sectional size from top to bottom, facilitating its expansion in all directions under pressure.

[0024] The top of the housing 13 is mounted on the robotic arm, facilitating the cutting of the injection-molded plastic products by the shearing blade 3. A second buffer mechanism 12, comprising a gear 1202 and an elastic element 1204, is mounted on the housing 13. One end of the elastic element 1204 is fixedly connected to one side of the gear 1202, while the other end of the elastic element 1204 is firmly connected to the housing 13. The gear 1202 is rotatably connected to the shearing blade 3. When the shearing blade 3 presses down to perform the cutting action, the gear 1202 on the shearing blade 3 rotates, and the elastic element 1204 deforms accordingly, absorbing the sudden shearing force generated during the cutting process. This prevents the shearing blade 3 from shifting or being damaged due to excessive force, ensuring cutting accuracy and extending the equipment's lifespan.

[0025] Connecting rods 10 are movably connected to both sides of the shearing table 1, with their other ends hinged to the slider 4, forming an adjustable linkage structure. Multiple convex grooves 201 are spaced along the length of the top surface of the worktable 2. The slider 4 is embedded in these grooves and can slide along them. A damper 9 is provided between the slider 4 and the opposite sidewall of the convex groove 201. This damper provides stable resistance during sliding, effectively suppressing the swaying and impact of the slider 4 due to inertia, ensuring smooth and precise adjustment, reducing wear on moving parts, and improving the long-term reliability and positioning accuracy of the equipment. When the shearing table 1 moves up and down under pressure, the pressure force is transferred to the damper 9, effectively reducing the vibration of the shearing table 1.

[0026] Multiple limiting grooves 202 are evenly distributed on the top surface of the worktable 2, and the limiting posts 5 are movably inserted into the grooves to achieve precise positioning and limiting of the shearing table 1. Both ends of the spring 6 have cylindrical bosses 7, with the top boss 7 tightly abutting against the bottom end of the limiting post 5, forming a stable elastic support structure. The bosses 7 can effectively absorb the stress generated by the spring 6. This design enhances the vertical stability of the limiting post 5, ensuring that the equipment maintains positioning accuracy and structural reliability during long-term operation, while also improving overall vibration damping performance and service life. Example

[0027] The first buffer mechanism is installed between the shearing table 1 and the worktable 2. The first buffer mechanism 11 reduces the buffering force when the shearing table 1 is pressed down. The first buffer mechanism 11 is made of soft plastic, which is convenient to absorb the force generated by the metal material and makes the shearing table 1 more stable.

[0028] The bottom surface of the buffer pad 1101 has a semi-circular body 1103, and the buffer pad 1101 and the stabilizing ring 1106 are integrally formed with the semi-circular body 1103. The buffer pad 1101 is located on the top surface of the semi-circular body 1103, providing flexible support and shock absorption; the stabilizing ring 1106 is integrally formed on the bottom surface of the semi-circular body 1103, enhancing the overall structural integrity and stress uniformity. This integrated design avoids assembly gaps and loosening, improving the stability and durability of the buffer mechanism. The inner side of the stabilizing ring 1106 extends into the air pressure cavity formed inside the semi-circular body 1103, increasing the overall stability.

[0029] The semicircular body 1103 has a through hole 1104 on its side wall that communicates with the air pressure cavity. When the air pressure cavity is pressurized and vented, the through hole 1104 can draw in outside air, balancing the pressure inside and outside the cavity and assisting the semicircular body 1103 in a smooth reset. This structure avoids negative pressure resistance during reset, improves the response speed and cycle stability of the first buffer mechanism 11, and ensures that the shearing table 1 maintains reliable vibration damping performance and structural durability during continuous operation.

[0030] The top surface of the buffer pad 1101 is provided with multiple connecting grooves 1102 spaced apart, and the bottom surface of the shear table 1 is provided with multiple connecting posts 8 at corresponding positions. The connecting posts 8 are respectively fitted into the connecting grooves 1102 to form a precise insertion fit. This structure realizes the rapid positioning and stable connection between the shear table 1 and the buffer pad 1101. Under pressure, the grooves and posts are used to disperse stress, avoid local deformation, and improve the load uniformity of the buffer pad 1101 and the stability of the overall structure. The quadrangular prism 1105 is located in the air pressure cavity provided in the semi-circular body 1103. The cross-sectional dimensions of the quadrangular prism 1105 gradually decrease from top to bottom, and the quadrangular prism 1105 can easily extend into the air pressure cavity after being compressed. Example

[0031] The shearing blade 3 has multiple rectangular holes 301 spaced apart. The housing 13 has two first mounting grooves 1301 spaced apart, with a second mounting groove 1302 sandwiched between them. Both the first mounting grooves 1301 and 1302 extend from one side of the housing 13 to the other. The top surfaces of the two first mounting grooves 1301 are each provided with a second limiting hole 1303 spaced apart, which, in conjunction with the rectangular holes 301, achieves precise positioning and stable installation of the shearing blade 3. This design improves the ease of blade assembly and repeatability, ensuring smooth and reliable shearing action.

[0032] The second buffer mechanism 12 is mounted on the housing 13. A rack 1201 is fixed to the side of the rectangular hole 301 and precisely meshes with the gear 1202, converting the rotational motion of the gear 1202 into the linear motion of the shearing blade 3. A connecting shaft 1203 is rotatably mounted on the housing 13 via bearings, passing through the first mounting groove 1301 and the second mounting groove 1302. The gear 1202 is rotatably sleeved on the connecting shaft 1203 via bearings. This structure avoids rigid collisions between the blade and the housing 13, improving shearing accuracy and equipment operational stability, while also enhancing the transmission reliability and long-term durability of the buffer mechanism.

[0033] The elastic element 1204 has a coiled structure, with one end fixedly connected to the connecting shaft 1203 and the other end fixedly attached to the inner wall of the second mounting groove 1302. This coiled design gives it excellent torsional elasticity and energy storage capacity, absorbing instantaneous shear stress through torsional deformation when the shear blade 3 is pressed down, thus achieving flexible buffering. Simultaneously, silicone pads 1205 are provided on the top surface of the first mounting groove 1301, which further attenuate residual stress and high-frequency vibrations during the rebound of the shear blade 3, preventing rigid collisions. The combined effect of these two elements improves the energy dissipation efficiency of the buffer mechanism and enhances the stability of the shearing process and the long-term reliability of the equipment.

[0034] Each silicone pad 1205 has a first limiting hole 12051 spaced apart, precisely aligned with a second limiting hole 1303 on the top surface of the first mounting groove 1301. A square rod 14 slides through the two holes, its bottom surface fixedly connected to the shearing blade 3. This structure, through the sliding engagement of the square rod 14 and the limiting holes, provides stable vertical guidance for the shearing blade 3, effectively suppressing lateral deviation and swaying during the shearing process. Simultaneously, the silicone pads 1205 continuously provide cushioning while limiting movement, preventing rigid contact between the square rod 14 and the hole wall. This ensures shearing accuracy, reduces wear on moving parts, and improves the long-term stability and reliability of the equipment.

[0035] In summary, the implementation principle of this embodiment is as follows: When the shearing equipment is running, the shearing table 1 is connected to the worktable 2 via the bottom corner limiting post 5 and the spring 6, and works with the bottom first buffer mechanism 11 to achieve vertical shock absorption and precise positioning. During shearing, the shearing blade 3 presses down, and its side gear 1202 meshes with the rack 1201 and rotates around the connecting shaft 1203, causing the coiled elastic element 1204 to undergo torsional deformation, absorbing instantaneous shear stress. When the shearing blade 3 rises through the robotic arm, the elastic element 1204 resets the shearing blade 3. At the same time, the silicone pad 1205 attenuates residual vibration through its high damping characteristics, avoiding rigid collisions. The square rod 14 passes through the first limiting hole 12051 of the silicone pad 1205 and the second limiting hole 1303 of the mounting groove, providing stable vertical guidance for the shearing blade 3 and suppressing lateral deviation. After shearing is completed, the pneumatic cavity of the first buffer mechanism 11 draws in outside air through the through hole 1104, causing the semi-circular body 1103 to return to its stable position; the elastic element 1204 releases its stored energy, driving the shearing blade 3 back to its original position. Throughout the process, the damper 9 suppresses the wobbling of the slider 4, ensuring smooth lateral adjustment of the shearing table 1; the insertion and engagement of the connecting column 8 and the connecting groove 1102 disperses stress, ensuring uniform load distribution on the buffer pad 1101. The synergistic action of all components achieves flexible buffering, precise guidance, and efficient reset of the shearing force, improving shearing accuracy, operational stability, and long-term equipment reliability.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vibration-free shearing buffer device for a sprue cutter, characterized in that, include: Shearing table (1), the bottom surface of the shearing table (1) is provided with a worktable (2) and the top surface is provided with a housing (13). The bottom corners of the shearing table (1) are provided with limiting posts (5). The bottom surface of the limiting posts (5) is provided with springs (6). The limiting posts (5) and springs (6) are movably inserted into the worktable (2). The first buffer mechanism (11) is located on the bottom surface of the shear table (1). The first buffer mechanism (11) includes a semicircular body (1103) and a quadrangular prism (1105). The semicircular body (1103) is provided with a pneumatic cavity. The pneumatic cavity is used to buffer the shear table (1) when it is pressed down. The quadrangular prism (1105) is located in the pneumatic cavity of the semicircular body (1103). The second buffer mechanism (12) is disposed on the housing (13). The second buffer mechanism (12) includes a gear (1202) and an elastic element (1204). One end of the elastic element (1204) is fixed on one side of the gear (1202), and the other end of the elastic element (1204) is fixedly connected to the housing (13). The gear (1202) is rotatably connected to the shearing blade (3). The elastic element (1204) is used to buffer the sudden shearing force when the shearing blade (3) is pressed down.

2. The vibration-free shearing buffer device for a sprue cutter according to claim 1, characterized in that, The shearing table (1) is provided with connecting rods (10) on both sides. The other end of the connecting rods (10) is connected to a slider (4). The top surface of the worktable (2) is provided with multiple convex grooves (201) spaced apart. The slider (4) is slidably disposed in the convex groove (201). The slider (4) and the convex groove (201) are provided with damping (9) on the opposite side.

3. The vibration-free shearing buffer device for a sprue cutter according to claim 1, characterized in that, The workbench (2) has multiple limiting grooves (202) on its top surface. A limiting post (5) is movably inserted into the limiting groove (202). Both ends of the spring (6) are provided with cylindrical bosses (7). The boss (7) on the top of the spring (6) abuts against the limiting post (5).

4. The vibration-free shearing buffer device for a sprue cutter according to claim 1, characterized in that, The first buffer mechanism (11) includes a buffer pad (1101) and a stabilizing ring (1106). The bottom surface of the buffer pad (1101) and the semicircular body (1103) are integrally formed, and the top surface of the stabilizing ring (1106) is integrally formed on the bottom surface of the semicircular body (1103).

5. The vibration-free shearing buffer device for a sprue cutter according to claim 1, characterized in that, The shearing blade (3) has rectangular holes (301) spaced apart. The housing (13) has two first mounting grooves (1301) and a second mounting groove (1302) spaced apart. The second mounting groove (1302) is located between the first mounting grooves (1301). The top surfaces of the two first mounting grooves (1301) are each provided with a second limiting hole (1303) spaced apart.

6. The vibration-free shearing buffer device for a sprue cutter according to claim 4, characterized in that, The side wall of the semicircular body (1103) is provided with a through hole (1104) that communicates with the air pressure cavity. The through hole (1104) is used to draw in outside air after the air pressure cavity is compressed, so that the semicircular body (1103) can be reset.

7. The vibration-free shearing buffer device for a sprue cutter according to claim 4, characterized in that, The top surface of the buffer pad (1101) is provided with multiple connecting grooves (1102) spaced apart, and the bottom surface of the shearing table (1) is provided with multiple connecting posts (8) spaced apart, and the connecting posts (8) are respectively fitted into the connecting grooves (1102).

8. The vibration-free shearing buffer device for a sprue cutter according to claim 5, characterized in that, The second buffer mechanism (12) includes a rack (1201) and a connecting shaft (1203). The rack (1201) is located on the side of the rectangular hole (301). The gear (1202) meshes with the rack (1201). The connecting shaft (1203) is rotatably located on the housing (13) and passes through the first mounting groove (1301) and the second mounting groove (1302). The gear (1202) is rotatably located on the connecting shaft (1203).

9. A vibration-free shearing buffer device for a sprue cutter according to claim 8, characterized in that, One end of the elastic element (1204) is fixedly connected to the connecting shaft (1203), and the other end is fixedly connected to the second mounting groove (1302). The top surface of the first mounting groove (1301) is provided with a silicone pad (1205). The silicone pad (1205) is used to buffer the shearing stress of the shearing blade (3). The elastic element (1204) is arranged in a coiled manner.

10. A vibration-free shearing buffer device for a sprue cutter according to claim 9, characterized in that, Each of the silicone pads (1205) is provided with a first limiting hole (12051) spaced apart, and each of the first mounting grooves (1301) is provided with a second limiting hole (1303) spaced apart on its top surface. Each of the first limiting holes (12051) and the second limiting holes (1303) is aligned and provided with a square rod (14), and the bottom surface of the square rod (14) is fixedly connected to the shearing blade (3).

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