Extruder excess material removal device

Abstract

The present invention discloses a residual material cutting device for an extruder, comprising a scissors rod assembly, which has a shearing blade; a pull rod assembly, which has a pull rod body, a residual material shifting block and a top block, the residual material shifting block is provided with a guide surface and a stripping end, the residual material shifting block and the top block are respectively arranged at two ends of the pull rod body, and the residual material shifting block is movably connected to the pull rod body, the guide surface contacts the shearing blade, and the pull rod body slides on the scissors rod assembly; a shearing cylinder, the execution end of the shearing cylinder is transmission-connected to the scissors rod assembly; a limiting member, which is arranged on the moving path of the scissors rod assembly, and when the top block abuts against the limiting member, the scissors rod assembly can still slide relative to the pull rod assembly under the drive of the shear cylinder, and the stripping end is guided away from the shear blade under the guidance of the guide surface, and only one shear cylinder is used to realize the two actions of shearing the residual material and stripping the residual material in sequence and continuously, and the problem of execution delay or parts damage caused by the sensor is avoided.

Description

Technical Field

[0001] The invention relates to the field of extrusion equipment, in particular to a residual material cutting device for an extruder. Background Art

[0002] The extruder is the main equipment for the production of light alloy (aluminum alloy, copper alloy and magnesium alloy) tubes, rods and profiles. It mainly uses the extrusion rod to extrude the hot-melt light alloy in the extrusion barrel to the forming die, and then extrude it through the forming port after being formed at the forming die. It is an important industrial process.

[0003] The die base of the forming die on the extruder is generally fastened to the beam of the extruder by bolts and other structures, and cannot be adjusted. There will be a gap between the extrusion barrel and the forming die, which can easily cause molten material to be retained during the forming process, affecting the next product forming. Therefore, a residual shear is set on the extruder to shear the residual material at the outlet of the forming die after extrusion. For example, the inventor disclosed a swingable residual shear with the authorization announcement number CN217831294U on November 18, 2022. During the shearing action, the guide mechanism can drive the blade of the scissors head to be located on the shearing surface for normal shearing operations. When returning to its original position, the blade of the scissors head can rotate away from the shearing surface under its own gravity. In this way, the effect of scraping off the residual material can be achieved well.

[0004] The inventors discovered through long-term use that existing swingable shears require a guide rod driver and a scissor frame driver. The guide rod driver is used to drive the movement of the guide rod. In other words, these swingable shears utilize the guide rod driver and scissor frame driver in conjunction to complete the shearing and stripping of the excess material. As a result, the shearing and stripping actions are performed in series. After the shearing action is completed, a sensor must be used to detect that the interlocking conditions are met before stripping can proceed. However, the sensor's detection and judgment has a certain delay, or if the sensor's detection and judgment are abnormal, it is easy for the two actions to not be properly coordinated, and may even cause problems such as component damage. Summary of the Invention

[0005] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a residual material cutting device for an extruder, which only uses one shearing cylinder to realize the two actions of shearing the residual material and peeling off the residual material in sequence and continuously, thereby reducing the difficulty of control and avoiding the problem of execution delay or part damage caused by sensors.

[0006] The technical solution adopted by the present invention to solve the problem is:

[0007] A residual material removal device for an extruder, comprising:

[0008] a scissor bar assembly having a shear blade;

[0009] A pull rod assembly comprising a pull rod body, a residual material shifting block, and a top block; the residual material shifting block is provided with a guide surface and a peeling end; the residual material shifting block and the top block are respectively provided at both ends of the pull rod body, and the residual material shifting block is movably connected to the pull rod body; the guide surface contacts the shear blade; and the pull rod body slides on the scissor rod assembly;

[0010] A shearing cylinder, the actuating end of which is transmission-connected to the scissor lever assembly;

[0011] A limiting member is provided on the moving path of the scissor rod assembly. When the top block abuts against the limiting member, the scissor rod assembly can still slide relative to the pull rod assembly under the drive of the shear cylinder, and the peeling end moves away from the shear blade under the guidance of the guide surface.

[0012] In some embodiments of the present invention, the waste material removal device of the extruder also includes a transmission shaft and a guide structure, and the waste material removal block of the pull rod assembly is rotatably connected to the scissor rod assembly through the transmission shaft, and the guide structure is used to guide the waste material removal block to move linearly along the moving direction of the scissor rod assembly, and enable the waste material removal block to deflect around the transmission shaft.

[0013] In some embodiments of the present invention, the guiding structure includes a cam groove and a cam member sliding in the cam groove, the cam groove having a deflection groove section extending obliquely toward one side of the shear blade, and a horizontal groove section arranged at at least one end of the deflection groove section, the groove length extension direction of the horizontal groove section is consistent with the moving direction of the scissors rod assembly, and the horizontal groove section is connected to the deflection groove section, the cam groove is arranged on one of the pull rod body and the residual material shifting block, and the cam member is fixed to the other of the pull rod body and the residual material shifting block.

[0014] In some embodiments of the present invention, the pull rod assembly further includes a buffer reset member, which abuts between the top block and the scissor lever assembly, and is used to drive the pull rod body to reset.

[0015] In some embodiments of the present invention, a guide and restraint groove is provided on the scissor rod assembly, and the guide and restraint groove is provided on the side opposite to the shearing surface of the shearing blade, and the residual material shifting block abuts against the inside of the guide and restraint groove.

[0016] In some embodiments of the present invention, at least one sliding member is provided between the pull rod body and the scissor lever assembly.

[0017] In some embodiments of the present invention, the excess material cutting device of the extruder also includes a residual material shear seat, which has a residual material shear inner cavity. The shear cylinder is fixed to the residual material shear seat and can drive the scissor rod assembly and the pull rod assembly to slide inside the residual material shear inner cavity. The limiter is fixedly connected to the residual material shear seat.

[0018] In some embodiments of the present invention, the excess material cutting device of the extruder also includes a scissor bar guide and an adjusting bolt, wherein the adjusting bolt passes through the excess material shear seat and is screwed to the scissor bar guide, the scissor bar assembly is slidably connected to the scissor bar guide, and the adjusting bolt is used to adjust the position of the scissor bar guide in the width direction of the excess material shear seat.

[0019] In some embodiments of the present invention, two opposite sides of the scissor bar assembly are provided with inclined first track surfaces, and the scissor bar guide rail is provided with a second track surface abutting against the first track surface.

[0020] In some embodiments of the present invention, a limiting guide rail is configured above the scissor lever assembly, an extension direction of the limiting guide rail is consistent with an extension direction of the scissor lever guide rail, and the scissor lever assembly is slidably connected to the limiting guide rail.

[0021] In summary, the excess material removal device for an extruder provided by the present invention has the following technical effects:

[0022] The present invention utilizes only a single shearing cylinder to complete the stock removal process, and cleverly coordinates the ejector block and stopper. After stock removal, the stripping end of the stock stripping block is guided away from the shear blade by a guide surface, thereby achieving a sequential and continuous stock removal process. This replaces the existing swingable stock pressing shears, which utilize sensors for detection and control. This avoids sensor-induced delays or component damage, reduces control complexity, and facilitates shorter equipment cycle times and improved efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall structural diagram of a residual material removal device for an extruder according to the present invention;

[0024] Figure 2 This is a first installation diagram of a residual material removal device for an extruder according to the present invention;

[0025] Figure 3 This is a second installation diagram of a residual material removal device for an extruder according to the present invention;

[0026] Figure 4 This is a third installation diagram of a residual material removal device for an extruder according to the present invention;

[0027] Figure 5 This is a fourth installation diagram of a residual material removal device for an extruder according to the present invention;

[0028] Figure 6 This is a fifth installation diagram of a residual material removal device for an extruder according to the present invention;

[0029] Figure 7 This is a first state diagram of a residual material cutting device of an extruder according to the present invention;

[0030] Figure 8 A diagram showing a second state of a residual material removal device of an extruder according to the present invention;

[0031] Figure 9 for Figure 8 A local enlarged schematic diagram of point A in the middle.

[0032] Icons: 1- scissor rod assembly, 11- shear blade, 12- limiting countersunk hole, 13- guide constraint groove, 14- pull rod guide groove, 15- pull rod adjustment groove, 16- positioning protrusion, 2- pull rod assembly, 21- pull rod body, 22- excess material shifting block, 23- top block, 24- guide surface, 25- peeling end, 26- pull rod extension, 27- pull rod slot, 28- nut fastener, 3- shear cylinder, 4- limiting piece, 51- transmission shaft, 511- shaft end limiting part, 52 -Axis fastener, 53-cam groove, 531-deflection groove section, 532-horizontal groove section, 54-cam member, 6-pressure shear seat, 61-pressure shear inner cavity, 62-base, 63-top cover, 631-top fixed edge, 632-limiting beam, 71-scissor rod guide rail, 72-adjusting bolt, 73-first track surface, 74-second track surface, 75-limiting guide rail, 8-sliding member, 81-first slider, 82-second slider, 83-third slider, 9-buffer reset member. DETAILED DESCRIPTION

[0033] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front",

[0035]

[0036] The orientation or positional relationship indicated by “outside” and the like is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Please combine the specific Figures 1 to 8 As shown, the present invention discloses a residual material cutting device for an extruder, comprising a scissor rod assembly 1, a pull rod assembly 2, a shear cylinder 3 and a limiter 4, wherein the shear cylinder 3 is preferably a hydraulic cylinder, or can also be a pneumatic cylinder, or can also be an electric cylinder.

[0039] In this embodiment, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, the scissor bar assembly 1 has a shear blade 11, and the shear blade 11 is preferably fixed to the end of the scissor bar assembly 1 by screws. The pull rod assembly 2 has a pull rod body 21, a residual material shifting block 22 and a top block 23. The residual material shifting block 22 and the top block 23 are respectively arranged at the two ends of the pull rod body 21. The residual material shifting block 22 is movably connected to the pull rod body 21. Preferably, a pull rod extension 26 is provided at the end of the pull rod body 21. The side wall of the pull rod extension 26 is provided with an external thread section. The external thread section and the internal thread section of the nut fastener 28 are adapted. An assembly hole for inserting the pull rod extension 26 is provided on the top block 23. The top block 23 is inserted into the pull rod extension 26 of the pull rod body 21, and the top block 23 can be fixedly connected to the pull rod body 21 by at least one nut fastener 28.

[0040] Furthermore, please combine Figure 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, the above-mentioned scrap shifting block 22 is provided with a guide surface 24 and a stripping end 25. Here, the guide surface 24 preferably includes a curved surface and a flat surface that smoothly transitions to the curved surface. The flat surface can also be a single curved surface. Among them, the end of the scrap shifting block 22 closest to the shear blade 11 is the stripping end 25. The guide surface 24 contacts the shear blade 11, and the stripping end 25 is close to or abuts the shear blade 11, thereby improving the structural strength of the shear blade 11 during the scrap shearing process to a certain extent, ensuring the stability of the scissors bar assembly 1 during the scrap shearing process.

[0041] Furthermore, please combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 9As shown, the execution end of the shear cylinder 3 is transmission-connected to the scissor rod assembly 1, and the pull rod body 21 slides on the scissor rod assembly 1. Specifically, the scissor rod assembly 1 is provided with a pull rod guide groove 14 and a pull rod adjustment groove 15. The pull rod adjustment groove 15 is located on the side close to the shear cylinder 3, and the pull rod adjustment groove 15 and the pull rod guide groove 14 are connected. The groove length extension direction of the pull rod guide groove 14 is consistent with the telescopic direction of the execution end of the shear cylinder 3, and the pull rod guide groove 14 passes through the scissor rod assembly 1 at one end close to the residual material shifting block 22, so that the residual material shifting block 22 can be movably connected to the end of the pull rod body 21, and the guide surface 24 of the residual material shifting block 22 can contact the shear blade 11.

[0042] In addition, please combine Figure 2 and Figure 3 As shown, when the pull rod body 21 slides inside the pull rod guide groove 14, the top block 23 slides inside the pull rod adjustment groove 15, that is, the groove length direction of the pull rod adjustment groove 15 is consistent with the groove length direction of the pull rod guide groove 14. When the pull rod body 21 slides inside the pull rod guide groove 14, it will drive the top block 23 to reciprocate along the groove length direction of the pull rod adjustment groove 15. When the top block 23 abuts against the groove wall of the pull rod adjustment groove 15 close to the pull rod guide groove 14, the top block 23 and the pull rod body 21 are constrained and stop sliding.

[0043] The core of this embodiment is to combine Figure 1 、 Figure 7 and Figure 8 As shown, the limiter 4 is provided on the moving path of the scissor lever assembly 1. Preferably, the limiter 4 is arranged above the pull rod guide groove 14 of the pull rod body 21, and the limiter 4 is located on the side close to the shear blade 11. Then, driven by the shear cylinder 3, the scissor lever assembly 1 will move in a translational direction along the extension and contraction direction of the execution end of the shear cylinder 3 until the top block 23 and the limiter 4 abut against each other. When the top block 23 abuts against the limiter 4, the pull rod body 21 is constrained by the limiter 4 and stops moving, while the scissor lever assembly 1 can still slide relative to the pull rod assembly 2 under the drive of the shear cylinder 3. That is, the scissor lever assembly 1 still continues to move in a translational direction along the extension and contraction direction of the execution end of the shear cylinder 3 under the drive of the shear cylinder 3, and the peeling end 25 is guided away from the shear blade 11 by the guide surface 24.

[0044] Understandably, please combine Figure 7 and Figure 8 As shown, relative sliding occurs between the scissor bar assembly 1 and the pull rod assembly 2, causing relative movement between the residual material shifting block 22 of the pull rod assembly 2 and the shear blade 11. At the same time, the guide surface 24 on the residual material shifting block 22 and the shear blade 11 are driven to generate relative deflection and sliding, so that the peeling end 25 on the residual material shifting block 22 and the shear blade 11 will form a separation effect.

[0045] That is, based on the above structure and connection relationship, the linkage principle of shearing and stripping the residual material of the residual material cutting device of the extruder is as follows:

[0046] Step STEP 1, the residual material cutting device shears the residual material: the shear cylinder 3 is started to drive the scissor bar assembly 1 to move, and the shear blade 11 of the scissor bar assembly 1 cuts the residual material from the end surface of the mold.

[0047] Step STEP2, peeling off the residual material of the residual material cutting device: the shear cylinder 3 keeps operating so that the top block 23 abuts against the limiter 4, and relative movement occurs between the shear blade 11 of the scissors rod assembly 1 and the residual material shifting block 22 of the pull rod assembly 2 (including relative sliding between the scissors rod assembly 1 and the pull rod assembly 2 in the telescopic direction of the execution end of the shear cylinder 3, and relative deflection sliding between the guide surface 24 on the residual material shifting block 22 and the shear blade 11), thereby continuing to peel off the residual material stuck on the shear blade 11.

[0048] From the above, it can be seen that the shearing and stripping actions can be performed sequentially and continuously using only the cooperation between the shearing cylinder 3 and the ejector block 23, achieving the goal of replacing the electrical control principle of the sensor with the mechanical control principle. This effectively avoids the problems of execution delays or component damage caused by the sensor, which helps shorten the equipment's operating cycle time and improve efficiency. In addition, the control is simpler, easy to operate and calibrate, and the difficulty of operation is greatly reduced.

[0049] Furthermore, the simplified structure and components of the swingable overstock shear (such as the existing sensor, guide rod driver, and pipe fittings connecting the guide rod driver) reduce the overall production cost of the equipment. Furthermore, by eliminating the problem of component damage caused by the sensor, the overall equipment failure points are reduced, reducing subsequent maintenance costs and improving the stability, reliability, and safety of the overstock removal device for the extruder.

[0050] In the above, in order to achieve relative deflection and sliding between the guide surface 24 on the residual material shifting block 22 and the shear blade 11, and to obtain a larger and more fixed deflection angle to achieve a better effect of peeling off the residual material, the inventors also provide a preferred method:

[0051] Please combine the specific Figure 5 、 Figure 7 、 Figure 8 and Figure 9As shown, the excess material removal device of the extruder also includes a transmission shaft 51 and a guide structure. The excess material shifting block 22 of the pull rod assembly 2 is rotatably connected to the scissor rod assembly 1 through the transmission shaft 51. Specifically, the number of transmission shafts 51 is preferably configured to be two. The excess material shifting block 22 is provided with a pull rod slot 27 for inserting the pull rod body 21. The two opposite groove walls of the pull rod slot 27 are connected to the scissor rod assembly 1 through the transmission shaft 51.

[0052] Preferably, please combine Figure 3 、 Figure 4 and Figure 5 As shown, the end of the transmission shaft 51 has an axis end limiting portion 511, and a limiting countersunk hole 12 is provided on the scissors rod assembly 1. The aperture of the limiting countersunk hole 12 is preferably adapted to the aperture of the axis end limiting portion 511, and the depth of the limiting countersunk hole 12 is greater than or equal to the thickness of the axis end limiting portion 511. The axis end limiting portion 511 is embedded in the limiting countersunk hole 12 and is fixedly connected to the scissors rod assembly 1 through an axis fastener 52, so that the transmission shaft 51 is fixedly connected to the scissors rod assembly 1 while avoiding the risk of the transmission shaft 51 moving along its own central axis, thereby ensuring the stability of the connection between the residual material shifting block 22 and the scissors rod assembly 1, and at the same time, improving the assembly efficiency between the residual material shifting block 22 and the scissors rod assembly 1.

[0053] Furthermore, the above-mentioned guiding structure is used to guide the residual material shifting block 22 to move horizontally along the moving direction of the scissors rod assembly 1, and enables the residual material shifting block 22 to deflect around the transmission shaft 51, that is, under the guiding action of the guiding structure, the guide surface 24 on the residual material shifting block 22 can stably form a larger and more fixed deflection angle with the shear blade 11, and utilize the rotational torque formed by the residual material shifting block 22 around the transmission shaft 51 to better promote the residual material stuck on the shear blade 11 to be peeled off. Compared with the knocking and vibration method, the shifting method has a better effect of peeling off the residual material.

[0054] As a preferred method of this embodiment, please refer to Figure 5 、 Figure 7 、 Figure 8 and Figure 9 As shown, the above-mentioned guiding structure includes a cam groove 53 and a cam member 54 slidably arranged in the cam groove 53, wherein the cam groove 53 has a deflection groove section 531 extending obliquely toward the side of the shear blade 11, and a horizontal groove section 532 provided at at least one end of the deflection groove section 531, that is, the end of the deflection groove section 531 away from the shear blade 11 is defined as the distal end of the groove section, and the end of the deflection groove section 531 close to the shear blade 11 is defined as the proximal end of the groove section, as shown in FIG. Figure 9As shown, the deflection slot segment 531 is provided with a horizontal slot segment 532 at both the distal end and the proximal end. In addition, only the distal end of the deflection slot segment 531 may be provided with a horizontal slot segment 532, or only the proximal end of the deflection slot segment 531 may be provided with a horizontal slot segment 532.

[0055] Furthermore, the horizontal slot section 532 and the deflection slot section 531 are connected, and the slot length extension direction of the horizontal slot section 532 is consistent with the movement direction of the scissors rod assembly 1. In this way, the inertia of the scissors rod assembly 1 during the movement can be buffered by the distance of the horizontal slot section 532 in the slot length extension direction, and under the guidance of the deflection slot section 531, the residual material shifting block 22 can be deflected around the transmission shaft 51, which not only ensures that a larger and more fixed deflection angle can be obtained between the guide surface 24 on the residual material shifting block 22 and the shear blade 11, thereby achieving a better effect of peeling off the residual material, but also ensures that the movement between the scissors rod assembly 1 and the pull rod assembly 2 is smoother and more stable.

[0056] It should be noted that if Figure 5 As shown, the cam groove 53 is provided on the pull rod body 21, and both ends of the cam member 54 are fixedly connected to the excess material shifting block member 22. In addition, the cam groove 53 is provided on the excess material shifting block member 22, and the cam member 54 is fixedly connected to the pull rod body 21.

[0057] It should also be noted that, in addition to utilizing the cooperation among the cam member 54, the cam groove 53, and the transmission shaft 51 as described above, the sliding friction generated by the abutting contact between the guide surface 24 of the residual stock shifting block 22 and the scissor lever assembly 1 can also be utilized to achieve the effect of relative deflection and sliding between the guide surface 24 of the residual stock shifting block 22 and the shear blade 11. Alternatively, the cooperation between the cam member 54 and the cam groove 53 can be used to apply a certain extrusion force toward the residual stock shifting block 22, thereby promoting the effect of relative deflection and sliding between the guide surface 24 of the residual stock shifting block 22 and the shear blade 11.

[0058] As a further preferred embodiment of this embodiment, please refer to Figure 3 As shown, the scissor lever assembly 1 is provided with a guide and restraining groove 13, which is located on the side opposite the shearing surface of the shear blade 11. The residual stock shifting block 22 abuts against the interior of the guide and restraining groove 13. Preferably, the width of the guide and restraining groove 13 matches the width of the residual stock shifting block 22, so that the guide surface 24 on the residual stock shifting block 22 abuts against the bottom of the guide and restraining groove 13. In this way, under the restraining effect of the guide and restraining groove 13, the residual stock shifting block 22 will not wobble in the width direction of the shear blade 11.

[0059] In the above description, when the pull rod body 21 is slidably arranged inside the pull rod guide groove 14, the surface of the pull rod body 21 and the groove wall of the pull rod guide groove 14 are likely to contact each other and cause large sliding friction. Therefore, in order to reduce the friction between the pull rod body 21 and the pull rod guide groove 14, the inventors also provide a preferred method:

[0060] Please combine the specific Figure 1 、 Figure 2 and Figure 4 As shown, at least one sliding member 8 is provided between the pull rod body 21 and the scissors rod assembly 1. That is, a sliding member 8 is provided between the pull rod body 21 and the pull rod guide groove 14. Preferably, the sliding member 8 includes a first slider 81 provided between the bottom of the pull rod guide groove 14 and the pull rod body 21, and a second slider 82 provided between the side wall of the pull rod guide groove 14 and the pull rod body 21. The first slider 81 can be bolted to the scissors rod assembly 1 or to the pull rod body 21. The second slider 82 can be bolted to the scissors rod assembly 1 or to the pull rod body 21. The use of the sliding member 8 can greatly reduce the contact area between the pull rod body 21 and the pull rod guide groove 14, thereby effectively reducing the sliding friction between the pull rod body 21 and the scissors rod assembly 1 and improving the smoothness of the pull rod body 21 sliding on the scissors rod assembly 1.

[0061] Of course, in order to prevent the pull rod body 21 from being separated from the pull rod guide groove 14 during the sliding process, please refer to the Figure 1 、 Figure 2 and Figure 4 As shown, the sliding member 8 further includes a third slider 83, which is the top of the pull rod body 21. The third slider 83 is fixedly connected to the scissor lever assembly 1 through a connecting block. In this way, not only can the pull rod body 21 be prevented from escaping from the pull rod guide groove 14, but also excessive friction on the sliding of the pull rod body 21 can be avoided.

[0062] As the preferred method of this embodiment, please refer to Figure 1 and Figure 2 As shown, the excess material cutting device of the extruder also includes a residual material shear seat 6, which has a residual material shear inner cavity 61. The shear cylinder 3 is fixed to the residual material shear seat 6 and can drive the scissor rod assembly 1 and the pull rod assembly 2 to slide inside the residual material shear inner cavity 61. The fixed connection here is preferably a bolt connection to facilitate subsequent disassembly and assembly for maintenance. The limiter 4 is fixedly connected to the residual material shear seat 6.

[0063] Preferably, please refer to Figure 1As shown, the shear seat 6 includes a base 62 and a top cover 63. The top cover 63 is preferably in the shape of a U-shaped character, that is, the top cover 63 includes top fixed edges 631 that are respectively arranged on two opposite sides of the shear inner cavity 61 and bolted to the base 62, and a limiting beam 632 connecting the two top fixed edges 631. The limiting beam 632 is preferably integrally formed with the top fixed edge 631. The limiting member 4 is bolted to the limiting beam 632 of the shear seat 6, so that the limiting member 4 can be maintained and replaced after long-term contact.

[0064] It can be understood that the top cover 63 can be replaced to change the width of the limiting beam 632 to adjust the position of the limiting member 4 in the direction of the scissors rod assembly 1. If it is necessary to fine-tune the constraint position in the direction of the scissors rod assembly 1, the limiting member 4 can also be replaced to change the thickness of the limiting member 4.

[0065] Furthermore, in order to reduce the sliding friction between the scissor bar assembly 1 and the residual shear seat 6, the wear of the scissor bar assembly 1 and the residual shear seat 6 is reduced, and the energy loss of the residual material cutting device is also reduced. Figure 3 、 Figure 4 and Figure 6 As shown, the excess material cutting device of the extruder also includes a scissor rod guide rail 71 and an adjusting bolt 72. The adjusting bolt 72 passes through the residual material shear seat 6 and is screwed to the scissor rod guide rail 71. The scissor rod assembly 1 is slidably connected to the scissor rod guide rail 71. The adjusting bolt 72 is used to adjust the position of the scissor rod guide rail 71 in the width direction of the residual material shear seat 6.

[0066] Specifically, please combine Figure 4 and Figure 6 As shown, the number of scissor bar guide rails 71 is preferably configured as two, and the two scissor bar guide rails 71 are respectively arranged on two opposite sides of the scissor bar assembly 1, so that the force applied to the scissor bar assembly 1 during movement is more balanced, and the extension direction of each scissor bar guide rail 71 is consistent with the movement direction of the scissor bar assembly 1. In this way, under the action of the scissor bar guide rails 71, the sliding friction between the scissor bar assembly 1 and the residual shear seat 6 will be reduced. It should be noted here that the number of scissor bar guide rails 71 can also be configured as three, four, five, etc., and the multiple scissor bar guide rails 71 are evenly distributed.

[0067] It should also be noted that the specific Figure 1 、 Figure 2 and Figure 6As shown, the adjusting bolt 72 is arranged perpendicular to the moving direction of the scissors rod assembly 1, and the number of the adjusting bolts 72 is preferably configured to be multiple, and the multiple adjusting bolts 72 are evenly distributed along the moving direction of the scissors rod assembly 1, and a plurality of threaded holes are provided on the residual shear seat 6, each threaded hole is adapted to each adjusting bolt 72, and each threaded hole corresponds to each adjusting bolt 72, so that the scissors rod guide rail 71 can be more accurately adjusted to the position in the width direction of the residual shear seat 6, and the extension direction of the scissors rod guide rail 71 can be better corrected to be consistent with the moving direction of the scissors rod assembly 1.

[0068] In the above, the scissor bar guide rail 71 can be selected from embedded modules, KK modules, linear modules, and straight modules. In addition, the inventor also provides a preferred method, please refer to the specific method. Figure 4 As shown, two opposite sides of the scissor bar assembly 1 are provided with inclined first track surfaces 73, and the first track surfaces 73 extend obliquely from the side of the scissor bar assembly 1 toward the inner side of the scissor bar assembly 1, and the two first track surfaces 73 are arranged opposite to each other. Correspondingly, the scissor bar guide rail 71 is provided with a second track surface 74 that abuts and contacts the first track surface 73.

[0069] In this way, under the guidance of the inclined first track surface 73, the scissor lever assembly 1 will be able to achieve the purpose of automatic positioning during the assembly process, reducing the difficulty of assembling the scissor lever assembly 1 to the shear seat 6. In addition, with the use of the adjusting bolt 72, the contact area between the first track surface 73 and the second track surface 74 can be adjusted, thereby well adjusting the sliding friction between the scissor lever assembly 1 and the scissor lever guide rail 71, making the scissor lever assembly 1 more stable and smooth during the sliding process.

[0070] Of course, in order to further improve the stability and smoothness of the scissor lever assembly 1 during the sliding process, please refer to Figure 2 As shown, a limit guide rail 75 can also be configured above the scissor bar assembly 1. The two limit guide rails 75 are respectively located on opposite sides of the inner cavity 61 of the residual shear, and the limit guide rails 75 are fixedly connected to the top cover 63 of the residual shear seat 6. The extension direction of the limit guide rail 75 is consistent with the extension direction of the scissor bar guide rail 71. In this way, the limit guide rails 75 and the scissor bar guide rail 71 are relatively distributed in the height direction of the scissor bar assembly 1, so that the top of the scissor bar assembly 1 can be guided by the limit guide rail 75, thereby making the scissor bar assembly 1 more stable and smooth during sliding.

[0071] As a preferred method of this embodiment, please refer to Figure 2 、 Figure 3 、 Figure 7 and Figure 8As shown, the above-mentioned pull rod assembly 2 also includes a buffer reset member 9, which can be a spring. The buffer reset member 9 abuts between the top block 23 and the scissor rod assembly 1. Specifically, one end of the buffer reset member 9 abuts against the top block 23, and the other end abuts against the groove wall of the pull rod adjustment groove 15. In order to prevent the buffer reset member 9 from popping out of the pull rod adjustment groove 15 during the deformation process, Figure 3 and Figure 4 As shown, one end of the buffer reset member 9 can be inserted into the nut fastener 28, and a positioning protrusion 16 for inserting the buffer reset member 9 can be provided on the groove wall of the pull rod adjustment groove 15, and the other end of the buffer reset member 9 can be inserted into the positioning protrusion 16.

[0072] So, like Figure 8 As shown, when the shearing cylinder 3 keeps operating and the top block 23 abuts the limiter 4, the shearing cylinder 3 drives the pull rod body 21 and the top block 23 to slide on the scissor bar assembly 1, thereby squeezing and compressing the buffer reset member 9. Part of the kinetic energy generated by the shearing cylinder 3 is converted into the internal energy of the buffer reset member 9, and at the same time, it cushions the movement of the pull rod body 21 and the scissor bar assembly 1. After completing the shearing and peeling of the excess material, the shearing cylinder 3 performs a reset action, and the scissor bar assembly 1 is reset along with the shearing cylinder 3.

[0073] During this process, the buffer reset member 9 deforms and recovers to drive the top block 23 to reset until the top block 23 abuts against the groove wall of the pull rod adjustment groove 15. At this time, the cam member 54 moves in the opposite direction in the cam groove 53 to reset, causing the residual material shifting block 22 to move in the opposite direction to reset. The peeling end 25 moves toward the direction close to the shear blade 11 under the guidance of the guide surface 24, thereby achieving the purpose of driving the pull rod body 21 to reset through the buffer reset member 9.

[0074] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A device for removing excess material from an extruder, characterized in that: include: A scissor bar assembly (1), wherein the scissor bar assembly (1) has a shear blade (11); A pull rod assembly (2), the pull rod assembly (2) comprising a pull rod body (21), a residual material shifting block (22) and a top block (23), the residual material shifting block (22) being provided with a guide surface (24) and a peeling end (25), the residual material shifting block (22) and the top block (23) being respectively provided at two ends of the pull rod body (21), and the residual material shifting block (22) being movably connected to the pull rod body (21), the guide surface (24) being in contact with the shear blade (11), and the pull rod body (21) sliding on the scissor rod assembly (1); A shearing cylinder (3), wherein the execution end of the shearing cylinder (3) is transmission-connected to the scissor lever assembly (1); A limiting member (4), the limiting member (4) being arranged on the moving path of the scissor lever assembly (1); when the top block (23) abuts against the limiting member (4), the scissor lever assembly (1) can still slide relative to the pull rod assembly (2) under the drive of the shear cylinder (3), and the peeling end (25) is guided away from the shear blade (11) by the guide surface (24); The excess material removal device of the extruder further comprises a transmission shaft (51) and a guide structure, wherein the excess material shifting block (22) of the pull rod assembly (2) is rotatably connected to the scissor bar assembly (1) via the transmission shaft (51), and the guide structure is used to guide the excess material shifting block (22) to move in a translational direction along the moving direction of the scissor bar assembly (1) and to enable the excess material shifting block (22) to deflect around the transmission shaft (51); The guiding structure includes a cam groove (53) and a cam member (54) slidingly arranged in the cam groove (53), the cam groove (53) having a deflection groove section (531) extending obliquely toward one side of the shear blade (11), and a horizontal groove section (532) arranged at at least one end of the deflection groove section (531), the groove length extension direction of the horizontal groove section (532) is consistent with the moving direction of the scissor rod assembly (1), and the horizontal groove section (532) is connected to the deflection groove section (531), the cam groove (53) is arranged on one of the pull rod body (21) and the residual material shifting block (22), and the cam member (54) is fixed to the other of the pull rod body (21) and the residual material shifting block (22).

2. The excess material removal device for an extruder according to claim 1, characterized in that: The pull rod assembly (2) further comprises a buffer reset member (9), the buffer reset member (9) abutting between the top block (23) and the scissor rod assembly (1), and the buffer reset member (9) is used to drive the pull rod body (21) to reset.

3. The excess material removal device for an extruder according to claim 1, characterized in that: The scissor lever assembly (1) is provided with a guide constraint groove (13), which is provided on a side opposite to the shearing surface of the shearing blade (11), and the excess material shifting block (22) abuts against the inside of the guide constraint groove (13).

4. The excess material removal device for an extruder according to claim 1, characterized in that: At least one sliding member (8) is provided between the pull rod body (21) and the scissor lever assembly (1).

5. The excess material removal device for an extruder according to claim 1 or 4, characterized in that: It also includes a residual shear seat (6), which has a residual shear inner cavity (61). The shear cylinder (3) is fixed to the residual shear seat (6) and can drive the scissor rod assembly (1) and the pull rod assembly (2) to slide inside the residual shear inner cavity (61). The limiter (4) is fixedly connected to the residual shear seat (6).

6. The excess material removal device for an extruder according to claim 5, characterized in that: The utility model also includes a scissor rod guide rail (71) and an adjusting bolt (72), wherein the adjusting bolt (72) passes through the pressure-reduced shear seat (6) and is screwed to the scissor rod guide rail (71), and the scissor rod assembly (1) is slidably connected to the scissor rod guide rail (71), and the adjusting bolt (72) is used to adjust the position of the scissor rod guide rail (71) in the width direction of the pressure-reduced shear seat (6).

7. The excess material removal device for an extruder according to claim 6, characterized in that: Two opposite sides of the scissor lever assembly (1) are provided with inclined first track surfaces (73), and the scissor lever guide rail (71) is provided with a second track surface (74) abutting against the first track surface (73).

8. The excess material removal device for an extruder according to claim 6 or 7, characterized in that: A limiting guide rail (75) is arranged above the scissor lever assembly (1); the extending direction of the limiting guide rail (75) is consistent with the extending direction of the scissor lever guide rail (71); and the scissor lever assembly (1) is slidably connected to the limiting guide rail (75).

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