Drawstring bending device

Abstract

The invention relates to the field of bending devices, in particular to a drawstring bending device which comprises a base, a top seat is fixed to the base through a plurality of supporting columns, a lower die seat is fixed to the base, a lower die is fixed to the lower die seat, a floating positioning block and an end limiting block are arranged on the lower die, a check block is fixed to the left side of the end limiting block, and an upper die is arranged above the lower die. The upper die is fixed to an upper die base, a die handle is fixed to the top face of the upper die base, the die handle is connected with a first oil cylinder, the first oil cylinder is fixed to a top base, and a stacking-feeding mechanism is arranged on the base. And in addition, after the strip-shaped steel plate is bent, the bent part of the strip-shaped steel plate cannot be thinned, and the strip-shaped steel plate is not easy to break.

Description

Technical Field

[0001] The present invention relates to the field of bending devices, and in particular to a drawstring bending device. Background Art

[0002] Bending equipment is a mechanical device used to process metal plates, pipes and other materials into specific angles or shapes through pressure. It is widely used in sheet metal processing, automobile manufacturing, aerospace and other fields. The patent with application number CN201620618305.3 discloses a wire bending equipment, which bends the end of the steel wire into a Z shape. First, the height of the horizontal connecting plate must be moved up and down to make the bending block through-hole and the limit seat through-hole flush with the wire laying height. Then, the horizontal connecting plate is fixed to the waist-shaped hole on the vertical adjustment plate with bolts. Secondly, the double-rod cylinder is started. The double-rod cylinder will push the rotating mechanism and the bending mechanism to move in the direction of the steel wire, and the steel wire is stuck in the bending block through-hole and the limit seat through-hole. Finally, it is started. The rotating cylinder drives the bending core to rotate counterclockwise relative to the limit seat. While the steel wire is clamped between the first bending block and the second bending block, the first bending block and the second bending block rotate into the second groove. This device has the following disadvantages during use: 1) The operation process is relatively complicated, resulting in low bending efficiency; 2) It can only adapt to the bending of steel wires, but not to the bending of strip steel plates; 3) It is not easy to remove the bent steel wire; 4) The bent part will become thinner after bending, which is prone to breakage. Therefore, there is an urgent need for a bending device that has high bending efficiency, can bend strip steel plates, is convenient for removing finished products, and does not thin the bent part after bending and is not prone to breakage. Summary of the Invention

[0003] (1) Technical problems solved In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a drawstring bending device to solve the problems existing in the existing technology. The bending equipment can bend strip steel plates. It is not only simple to operate and has high bending efficiency, but also very convenient to remove the finished product after bending. In addition, the bent part of the strip steel plate will not become thinner after bending and is not prone to breakage.

[0004] (2) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drawstring bending device, comprising a base, which is fixed to a top seat by a number of support columns, a lower die seat is fixed on the base, a lower die is fixed on the lower die seat, a floating positioning block and an end limit block are provided on the lower die, a stop block is fixed on the left side of the end limit block, an upper die is provided above the lower die, the upper die is fixed on the upper die seat, a die handle is fixed on the top surface of the upper die seat, the die handle is connected to a first oil cylinder, the first oil cylinder is fixed on the top seat, and a stacking-feeding mechanism is provided on the base.

[0005] Preferably, a first groove is provided on the lower mold, and a first embedding groove matching the floating positioning block, a second embedding groove matching the stop block, and a third embedding groove matching the end limit block are provided in the first groove from left to right. The floating positioning block is movably connected to the first embedding groove, the stop block is fixed in the second embedding groove, and the end limit block is fixed in the third embedding groove.

[0006] Preferably, the floating positioning block includes a main block, and the front and rear sides of the main block are provided with side blocks integrally formed therewith. The two side blocks are symmetrically arranged front to back, and their upper surfaces are higher than the main block, and their lower surfaces are flush with the lower surface of the main block. A second groove is formed between the main block and the two side blocks, and a fourth embedding groove matching the side blocks is provided on the lower mold. A number of springs are evenly fixed on the lower surface of the main block and the lower surface of the side blocks, and the lower ends of the springs are fixed on the bottom surface of the first embedding groove or the fourth embedding groove.

[0007] Preferably, the stacking-feeding mechanism includes a first fixed seat fixed on the base, the first fixed seat is arranged on the left side of the lower mold seat, a third groove is provided on the first fixed seat, a second fixed seat is fixed on the right side of the first fixed seat, the top surface of the second fixed seat is flush with the bottom surface of the third groove, a lifting plate is provided above the first fixed seat, the lifting plate is fixed on the piston rod of the second oil cylinder, the second oil cylinder is fixed on the top seat, a clamping mechanism is fixed at the right end of the top surface of the lifting plate, a first stacking trough is provided at the right end of the lower surface of the lifting plate, a second stacking trough is provided at the right end of the bottom surface of the third groove, and an extrusion mechanism is provided on the left side of the first fixed seat.

[0008] Preferably, the clamping mechanism includes a longitudinal support plate fixed to the right end of the top surface of the lifting plate, a transverse support plate is fixed to the top of the longitudinal support plate, a third oil cylinder is fixed on the transverse support plate, and a clamping block is fixed to the end of the piston rod of the third oil cylinder; the extrusion mechanism includes a third fixed seat fixed on the base, a fourth oil cylinder is fixed on the top surface of the third fixed seat, and an extrusion block is fixed to the end of the piston rod of the fourth oil cylinder.

[0009] Preferably, the upper mold includes a fixed block fixedly connected to the upper mold base, a pressure block integrally formed with the fixed block is fixed to the bottom of the fixed block, a cavity is opened at the lower right end of the pressure block, a guide column and guide sleeve structure is connected between the upper mold base and the lower mold base, and the guide column and guide sleeve structure is provided with two groups, which include a guide column fixed on the lower mold base, the upper end of the guide column is slidably connected to the guide sleeve, and the upper end of the guide sleeve is fixed on the upper mold base.

[0010] Preferably, the upper surface of the lower mold is set to be inclined with the left end higher and the right end lower, the first groove is set to be inclined with the left end higher and the right end lower, and the bottom surface of the upper mold is set to be inclined with the left end higher and the right end lower.

[0011] Preferably, a sliding groove is provided on the side of the side block away from the main block, and a sliding block matching the sliding groove is provided on the fourth embedding groove.

[0012] Preferably, the first stacking trough includes a first arc segment connected to the bottom surface of the lifting plate, the first arc segment is arranged to be inclined to the upper right, the first arc segment is connected to a horizontal segment, the horizontal segment is connected to a second arc segment, and the second arc segment is arranged to be inclined to the lower right.

[0013] Preferably, the stopper is provided with several supporting mechanisms, the supporting mechanisms include a supporting block fixed in the stopper, a plurality of peak-shaped protrusions are fixed on the supporting block, the peak-shaped protrusions include a base portion fixed on the supporting block, an elastic layer is fixed on the top surface of the base portion, a top portion is fixed on the top surface of the elastic layer, a cavity is opened above the supporting block, the peak-shaped protrusions are arranged in the cavity, part of the top portion extends out of the cavity, and a through hole through which the top portion extends is opened on the top plate of the cavity.

[0014] (3) Beneficial effects 1. The present invention can bend strip steel plates through the setting of the structural bending equipment. It is not only simple to operate and has high bending efficiency, but also very convenient to take out the finished product after bending. In addition, the bent part of the strip steel plate will not become thinner after bending and is not prone to breakage.

[0015] 2. The present invention sets the second groove to be in an inclined shape with the left end higher and the right end lower. In this way, in the process of pushing the drawstring onto the upper mold, when the drawstring part located on the upper mold is heavier than the drawstring located on the first fixed seat and the second fixed seat, the drawstring part above the second groove will fall downward into the second groove. Since the second groove is in an inclined shape with the left end higher and the right end lower, the drawstring will slide to the right along the second groove until the right end of the drawstring hits the end limit block. This not only has a good limiting effect on the drawstring, but also saves the stroke of the fourth cylinder to push the drawstring, thereby saving energy.

[0016] 3. The present invention arranges the floating positioning block to be composed of a main block, a side block and a spring, wherein the second groove formed between the main block and the two side blocks better limits the drawstring, so that the drawstring is more stable during the bending process. The floating positioning block can float up and down through the setting of the spring. At the same time, the setting of the first embedded groove and the fourth embedded groove has a good limiting effect on the floating positioning block to prevent its position from shifting. After the bending of the drawstring is completed, the spring can eject the formed drawstring upward, which greatly facilitates the removal of the formed drawstring.

[0017] 4. The present invention sets the upper surface of the lower mold to an inclined shape with the left end higher and the right end lower, sets the first groove to an inclined shape with the left end higher and the right end lower, and sets the bottom surface of the upper mold to an inclined shape with the left end higher and the right end lower. Through this setting, the drawstring can be better limited, and the right end of the drawstring will be against the end limit block, and there will be no position deviation, thereby improving the accuracy of bending.

[0018] 5. The present invention is achieved by configuring the first stacking trough to be composed of a first arc segment, a horizontal segment and a second arc segment, wherein the configuration of the first arc segment plays a good role in guiding materials and transition connection; wherein the configuration of the horizontal segment enables the portion of the pull belt corresponding to the stacking to form a platform, wherein the lower right end of the pressure block is aligned with the middle position of the platform at the stacking location, so that the contact area between the pressure block and the pull belt stacking location is larger, thereby facilitating bending and improving the bending effect; wherein the second arc segment plays a good transition connection role; wherein the shape of the second stacking trough is the same as that of the first stacking trough, and also includes a first arc segment, a horizontal segment and a second arc segment, and the configuration of the horizontal segment enables the portion of the pull belt corresponding to the stacking to form a platform, thereby enabling the contact area between the pull belt and the block at the stacking location to be larger, thereby making the pull belt more stable during the bending process, thereby improving the bending effect.

[0019] 6. The present invention supports the bottom surface of the rear pull belt after irregular material stacking through the retractable peak-shaped protrusions, which has a good supporting effect and prevents the occurrence of a hollow state, thereby ensuring the bending effect; wherein, the setting of the peak-shaped protrusions provides point support for the rear pull belt after the material stacking, so that even if the vacant area is very small, it can be supported, and since there are a large number of peak-shaped protrusions and the coverage range is wide, the support range is made larger, thereby improving the supporting effect; wherein, the setting of the cavity facilitates the deformation of the peak-shaped protrusions, and at the same time, the setting of the peak-shaped protrusions facilitates them to extend out of the through hole after being compressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the present invention.

[0021] Figure 2 For the present invention Figure 1 Schematic diagram after removing the base, support column, top seat, first cylinder and stacking-feeding mechanism.

[0022] Figure 3 It is a schematic diagram of the lower mold, the first groove, the first embedding groove, the second embedding groove, the third embedding groove and the fourth embedding groove of the present invention.

[0023] Figure 4 This is a schematic diagram of the floating positioning block, spring and slide groove of the present invention.

[0024] Figure 5 It is a schematic diagram of the base, support column, top seat and stacking-feeding mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the first fixing seat, the second fixing seat, the lifting plate, the first stacking trough and the second stacking trough of the present invention.

[0026] Figure 7 Schematic diagram of the clamping mechanism of the present invention.

[0027] Figure 8 Schematic diagram of the extrusion mechanism of the present invention.

[0028] Figure 9 Schematic diagram of the upper mold of the present invention.

[0029] Figure 10 It is a schematic diagram of the upper die base, lower die base, guide pin and guide sleeve structure and die handle of the present invention.

[0030] Figure 11 Schematic diagram of the lifting plate and the first stacking trough of the present invention.

[0031] Figure 12 It is a schematic diagram of the end limit block, the stop block and the pull belt after the stacking of materials according to the present invention.

[0032] Figure 13 Schematic diagram of the stopper and support mechanism of the present invention.

[0033] Figure 14 Schematic diagram of the support mechanism of the present invention.

[0034] Figure 15 Schematic diagram of the mountain-shaped protrusion of the present invention.

[0035] Figure 16 For the present invention Figure 13 Schematic diagram after removing the peak-like protrusions.

[0036] Figure 17 Schematic diagram of the drawstring of the present invention.

[0037] Figure 18 Schematic diagram of the draw belt after forming according to the present invention.

[0038] In the figure: 1-base, 2-support column, 3-top seat, 4-lower die seat, 5-lower die, 6-floating positioning block, 7-end limit block, 8-stopper, 9-upper die, 10-upper die seat, 11-die handle, 12-first oil cylinder, 13-stacking-feeding mechanism, 14-first groove, 15-first embedded groove, 16-second embedded groove, 17-third embedded groove, 18-main block, 19-side stopper, 20-second groove, 21-fourth embedded groove, 22-spring, 23-first fixed seat, 24-third groove, 25-second fixed seat, 26-lifting plate, 27-second oil cylinder, 28-pressing mechanism, 29-first stacking trough, 30-second Stacking trough, 31-extrusion mechanism, 32-longitudinal support plate, 33-transverse support plate, 34-third oil cylinder, 35-pressing block, 36-third fixed seat, 37-fourth oil cylinder, 38-extrusion block, 39-fixed block, 40-pressing block, 41-cavity, 42-guide column and guide sleeve structure, 43-guide column, 44-guide sleeve, 45-chute, 46-first arc segment, 47-horizontal segment, 48-second arc segment, 49-support mechanism, 50-support block, 51-peak-shaped protrusion, 52-base, 53-elastic layer, 54-top, 55-cavity, 56-through hole, 57-pull belt, 58-pull belt after stacking, 59-pull belt after forming. DETAILED DESCRIPTION

[0039] The following is a combination of the embodiments of the present invention Figure 1-18 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] The present invention provides a technical solution: a drawstring bending device, comprising a base 1, the base 1 is fixed with a top base 3 through a plurality of support columns 2, a lower die base 4 is fixed on the base 1, a lower die 5 is fixed on the lower die base 4, a floating positioning block 6 and an end limit block 7 are provided on the lower die 5, a stop block 8 is fixed to the left side of the end limit block 7, a first groove 14 is provided on the lower die 5, and a first embedding groove 15 matching the floating positioning block 6, a second embedding groove 16 matching the stop block 8, and a second embedding groove 17 matching the end limit block 7 are provided in the first groove 14 from left to right. The third embedding groove 17, the floating positioning block 6 is movably connected to the first embedding groove 15, the stopper 8 is fixed in the second embedding groove 16, and the end limit block 7 is fixed in the third embedding groove 17. An upper mold 9 is provided above the lower mold 5, and the upper mold 9 is fixed on the upper mold base 10. A mold handle 11 is fixed on the top surface of the upper mold base 10, and the mold handle 11 is connected to the first oil cylinder 12. The first oil cylinder 12 is fixed on the top seat 3. A stacking-feeding mechanism 13 is provided on the base 1, and the stacking-feeding mechanism 13 includes a first fixed seat 23 fixed on the base 1. The first fixed seat 23 is provided On the left side of the lower die base 4, a third groove 24 is provided on the first fixed seat 23, and a second fixed seat 25 is fixed on the right side of the first fixed seat 23. The top surface of the second fixed seat 25 is flush with the bottom surface of the third groove 24. A lifting plate 26 is provided above the first fixed seat 23. The lifting plate 26 is fixed on the piston rod of the second oil cylinder 27. The second oil cylinder 27 is fixed on the top seat 3. A pressing mechanism 28 is fixed on the right end of the top surface of the lifting plate 26. A first stacking trough 29 is provided on the right end of the lower surface of the lifting plate 26. The right end of the bottom surface of the third groove 24 is provided with a The second stacking trough 30 has an extrusion mechanism 31 on the left side of the first fixed seat 23, and the clamping mechanism 28 includes a longitudinal support plate 32 fixed to the right end of the top surface of the lifting plate 26, and a transverse support plate 33 is fixed to the top of the longitudinal support plate 32. A third oil cylinder 34 is fixed on the transverse support plate 33, and a clamping block 35 is fixed to the end of the piston rod of the third oil cylinder 34; the extrusion mechanism 31 includes a third fixed seat 36 fixed on the base 1, and a fourth oil cylinder 37 is fixed on the top surface of the third fixed seat 36, and a squeezing block 38 is fixed to the end of the piston rod of the fourth oil cylinder 37. The present invention requires that the drawstring 57 be bent into the shape of the formed drawstring 59, that is, one end of the flat drawstring 57 is bent into a Z shape. During specific operation, the drawstring 57 is first inserted into the third groove 24, wherein the height and width of the third groove 24 are the same as the height and width of the drawstring 57, that is, when the lifting plate 26 and the first fixed seat 23 are closed, after the drawstring 57 is inserted into the third groove 24, the upper and lower front and rear four surfaces of the drawstring 57 are respectively in contact with the three surfaces of the third groove 24 and the bottom surface of the lifting plate 26, and the left and right ends of the drawstring 57 extend out of the third groove 24 for a distance, and the specific distance to be extended is set according to actual needs.There are two methods for placing the drawstring 57 into the third groove 24. One method is to directly insert the drawstring 57 into the third groove 24 when the lifting plate 26 is closed with the first fixed seat 23. The other method is to use the second oil cylinder 27 to lift the lifting plate 26 and separate it from the first fixed seat 23, then place the drawstring 57 into the third groove 24, and then use the second oil cylinder 27 to lower the lifting plate 26 and reclose it with the first fixed seat 23. In this way, there are two methods to choose from for placing the drawstring 57, which is more flexible. Whichever method is more convenient in practice can be used. After the drawstring 57 is placed, the third oil cylinder 34 is started to press the clamping block 35 downward until it compresses the drawstring 57 below it. The right side of the longitudinal support plate 32, the right side of the lifting plate 26, and the right side of the first fixed seat 23 are aligned and on the same longitudinal plane. The left side of the clamping block 35 contacts the right side of the longitudinal support plate 32, and the two are slidably connected. After the pressing block 35 presses the portion of the drawstring 57 below it, the fourth oil cylinder 37 starts, driving the extrusion block 38 to the right. When the extrusion block 38 contacts the drawstring 57, the extrusion block 38 begins to squeeze the drawstring 57. The right end face of the extrusion block 38 coincides with or is slightly smaller than the left end face of the drawstring 57. In the process of the extrusion block 38 squeezing the drawstring 57 to the right, a stacking process will occur in the first stacking trough 29 and the second stacking trough 30. The portion of the drawstring 57 corresponding to the first stacking trough 29 and the second stacking trough 30 is the place that needs to be bent. The portion of the drawstring that needs to be bent is pre-stacked to make it thicker in advance, so that the bent portion will not become thinner and will not easily break when bent. In the process of squeezing, the drawstring 57 is well limited by the pressing mechanism 28 and the lifting plate 26, thereby ensuring the stacking effect. The first stacking trough 29 is the bend on the upper surface of the drawstring 57 , and the second stacking trough 30 is the bend on the lower surface of the drawstring 57 . The bending amplitude of the upper surface bend is greater than that of the lower surface bend, so the depth of the first stacking trough 29 is greater than that of the second stacking trough 30 .After the extrusion of the pull belt 57 is completed, the third oil cylinder 34 is started to raise the pressing block 35 to its original position. At the same time, the fourth oil cylinder 37 stops running, and the second oil cylinder 27 is started to raise the lifting plate 26 to a certain height. Then the fourth oil cylinder 37 is started, and its piston rod continues to extend, pushing the pull belt 57 to the right until it is pushed onto the floating positioning block 6, wherein the floating positioning block 6 includes a main block 18, and the front and rear sides of the main block 18 are provided with side blocks 19 integrally formed therewith. The two side blocks 19 are symmetrically arranged front and back, and their upper surfaces are higher than the main block 18, and their lower surfaces are flush with the lower surface of the main block 18. A second groove 20 is formed between the main block 18 and the two side blocks 19, and the lower mold 5 A fourth embedding groove 21 matching the side block 19 is provided on the top, and a number of springs 22 are evenly fixed on the lower surface of the main block 18 and the lower surface of the side block 19. The lower end of the spring 22 is fixed on the bottom surface of the first embedding groove 15 or the fourth embedding groove 21, that is, the pull strap 57 is pushed into the second groove 20, wherein the pull strap 57 is aligned with the second groove 20, and the height of the pull strap 57 is between the bottom surface and the top end of the second groove 20, wherein the distance between the second fixed seat 25 and the lower mold 5 is adjusted according to actual conditions, as long as it can be ensured that the floating positioning block 6 will not fall during the process of pushing the pull strap 57 to the floating positioning block 6, the most ideal state is that the second fixed seat 25 and the lower mold 5 are together.The second groove 20 is set to an inclined shape with a higher left end and a lower right end. In this way, in the process of pushing the drawstring 57 onto the upper mold 5, when the drawstring 57 part located on the upper mold 5 is heavier than the drawstring 57 located on the first fixed seat 23 and the second fixed seat 25, the drawstring 57 part above the second groove 20 will fall downward into the second groove 25. Since the second groove 20 is inclined with a higher left end and a lower right end, the drawstring 57 will slide to the right along the second groove 20 until the right end of the drawstring 57 touches the end limit block 7. This not only has a good limiting effect on the drawstring 57, but also can save the stroke of the fourth oil cylinder 37 to push the drawstring 57, thereby saving energy. At this time, the drawstring 57 is higher than the upper surface of the lower mold 5, and then the first oil cylinder 12 is started, driving the mold handle 11 downward, and then driving the upper mold seat 10 downward, and then driving the upper mold 9 downward to press the drawstring 57. When the bottom surface of the upper mold 9 is at the same level as the bottom surface of the upper mold 9 After the drawstring 57 contacts, since the floating positioning block 6 can float up and down, the upper mold 9 begins to press the drawstring 57 downward. When the right end of the drawstring 57 contacts the stopper 8, the part of the drawstring 57 blocked by the stopper 8 cannot move downward, and the remaining part of the drawstring 57 not blocked by the stopper 8 will continue to move downward until the bottom surface of this part of the drawstring 57 contacts the bottom surface of the first groove 14. At this time, the drawstring 57 cannot move downward, that is, the upper mold 9 and the lower mold 5 are in a completely molded state, thus completing the Z-shaped bending of the end of the drawstring 57. After the bending is completed, the first oil cylinder 12 starts in the reverse direction to raise the upper mold 9 to its original position. After the upper mold 9 is separated from the lower mold 5, the floating positioning block 6 is not subjected to pressure, and it will float upward, thus pushing the drawstring 59 after molding upward, greatly facilitating the removal of the drawstring 59 after molding, and then putting in the next piece of drawstring 57 for bending, and repeating this cycle. The number of springs 22 is set according to actual needs. The setting of the springs 22 enables the floating positioning block 6 to float up and down. At the same time, the setting of the first embedded groove 15 and the fourth embedded groove 21 plays a good limiting role on the floating positioning block 6 to prevent its position from shifting. After the bending of the drawstring 57 is completed, the spring 22 can eject the formed drawstring 59 upward, which greatly facilitates the removal of the formed drawstring 59. The left side of the upper surface of the block 8 is aligned with the center position of the arc block formed after the drawstring 57 is stacked. The present invention can bend the strip steel plate through the setting of the structural bending equipment. It is not only simple to operate and has high bending efficiency, but also very convenient to remove the finished product after bending. In addition, the bending part of the strip steel plate will not become thinner after bending and is not prone to breakage.

[0041] The upper die 9 includes a fixed block 39 fixedly connected to the upper die base 10. A pressure block 40 integrally formed with the fixed block 39 is fixed to the bottom of the fixed block 39. A cavity 41 is defined at the lower right end of the pressure block 40. A guide post and guide sleeve structure 42 is connected between the upper die base 10 and the lower die base 4. The guide post and guide sleeve structure 42 is provided with two groups, each including a guide post 43 fixed to the lower die base 4. The upper end of the guide post 43 is slidably connected to a guide sleeve 44. The upper end of the guide sleeve 44 is fixed to the upper die base 10. The provision of the guide post and guide sleeve structure 42 plays a good guiding role in the raising and lowering of the upper die 9.

[0042] The upper surface of the lower die 5 is arranged in an inclined shape with the left end higher and the right end lower. The first groove 14 is arranged in an inclined shape with the left end higher and the right end lower. The bottom surface of the upper die 9 is arranged in an inclined shape with the left end higher and the right end lower. The angles of inclination of the upper surface of the lower die 5, the first groove 14, the bottom surface of the upper die 9, and the second groove 20 are consistent. This arrangement can better limit the position of the drawstring 57. The right end of the drawstring 57 will abut the end stop block 7 without any position deviation, thereby improving the bending accuracy.

[0043] A slide groove 45 is provided on the side of the side block 19 away from the main block 18, and a slider that matches the slide groove 45 is provided on the fourth insertion groove 21. The slide groove 45 further limits the floating positioning block 6, and in particular, effectively prevents the floating positioning block 6 from being ejected from the first insertion groove 15 by the spring 22 after the upper mold 9 and the lower mold 5 are separated.

[0044] The first stacking trough 29 includes a first arc segment 46 connected to the bottom surface of the lifting plate 26. The first arc segment 46 is arranged to be inclined to the upper right. The first arc segment 46 is connected to a horizontal segment 47. The horizontal segment 47 is connected to a second arc segment 48. The second arc segment 48 is arranged to be inclined to the lower right. Figure 11 The first arc segment 46 is provided to guide the material and provide a good transition connection. The horizontal segment 47 is provided to form a platform at the portion corresponding to the pull belt 58 after the material is stacked. The lower right end of the pressure block 40 is aligned with the middle position of the platform at the material stacking location, which increases the contact area between the pressure block 40 and the pull belt at the material stacking location, thereby facilitating bending and improving the bending effect. The second arc segment 48 plays a good transition connection role. The shape of the second material stacking trough 30 is the same as that of the first material stacking trough 29, and also includes a first arc segment, a horizontal segment, and a second arc segment. The horizontal segment is provided to form a platform at the portion corresponding to the pull belt 58 after the material is stacked. This increases the contact area between the pull belt 58 after the material is stacked and the block 8, thereby making the pull belt 58 more stable during the bending process, thereby improving the bending effect.

[0045] The stopper 8 is provided with a plurality of support mechanisms 49, which include a support block 50 fixed within the stopper 8, and a plurality of peak-shaped protrusions 51 fixed to the support block 50. The peak-shaped protrusions 51 include a base portion 52 fixed to the support block 50, an elastic layer 53 fixed to the top surface of the base portion 52, and a top portion 54 fixed to the top surface of the elastic layer 53. A cavity 55 is defined above the support block 50, and the peak-shaped protrusions 51 are disposed within the cavity 55. Part of the top portion 54 extends out of the cavity 55, and a through hole 56 is defined on the top plate of the cavity 55, through which the top portion 54 extends. Figure 12 As shown, after the stacking rear drawstring 58 is placed on the block 8, there will be a gap between it and the block 8. The existence of this gap makes the stacking rear drawstring 58 insufficiently in contact with the upper surface of the block 8, thereby affecting the bending effect; in addition, during the stacking process of the drawstring, the stacked portion of the drawstring may have ups and downs or be partially empty, which will also lead to insufficient contact between the second stacking trough 30 and the block 8, thereby increasing the difficulty of bending and affecting the bending effect. Therefore, the above problem is solved by providing a support mechanism 49 in the block 8. The retractable mountain-shaped protrusion 51 is used to support the bottom surface of the irregular stacking rear drawstring 58, which has a good supporting effect and prevents the occurrence of a hollow state, thereby ensuring the bending effect. The elastic layer 53 can be a rubber layer, a silicone layer, or a spring layer, as long as it has sufficient elasticity. The peak-shaped protrusions 51 provide point support for the pull strap 58 after the material is piled. This allows support even when the vacant area is small. Furthermore, the large number of peak-shaped protrusions 51 provides a wide coverage area, thereby enhancing the support effect. The cavity 55 facilitates the deformation of the peak-shaped protrusions 51 and facilitates their extension out of the through-hole 56 after being compressed.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drawstring bending device, characterized in that: The invention comprises a base (1), wherein the base (1) is fixed with a top seat (3) through a plurality of support columns (2), a lower die seat (4) is fixed on the base (1), a lower die (5) is fixed on the lower die seat (4), a floating positioning block (6) and an end limit block (7) are provided on the lower die (5), a stop block (8) is fixed on the left side of the end limit block (7), an upper die (9) is provided above the lower die (5), the upper die (9) is fixed on the upper die seat (10), a die handle (11) is fixed on the top surface of the upper die seat (10), the die handle (11) is connected to a first oil cylinder (12), the first oil cylinder (12) is fixed on the top seat (3), and a stacking-feeding mechanism (13) is provided on the base (1).

2. A drawstring bending device according to claim 2, characterized in that: The lower mold (5) is provided with a first groove (14), and the first groove (14) is provided with a first embedding groove (15) matching the floating positioning block (6), a second embedding groove (16) matching the stop block (8), and a third embedding groove (17) matching the end limit block (7) from left to right. The floating positioning block (6) is movably connected to the first embedding groove (15), the stop block (8) is fixed in the second embedding groove (16), and the end limit block (7) is fixed in the third embedding groove (17).

3. A drawstring bending device according to claim 2, characterized in that: The floating positioning block (6) includes a main block (18), and the front and rear sides of the main block (18) are provided with side blocks (19) integrally formed therewith. The two side blocks (19) are symmetrically arranged front and back, and their upper surfaces are higher than the main block (18), and their lower surfaces are flush with the lower surface of the main block (18). A second groove (20) is formed between the main block (18) and the two side blocks (19). The lower mold (5) is provided with a fourth embedding groove (21) matching the side blocks (19). A plurality of springs (22) are evenly fixed on the lower surface of the main block (18) and the lower surface of the side blocks (19), and the lower end of the spring (22) is fixed on the bottom surface of the first embedding groove (15) or the fourth embedding groove (21).

4. A drawstring bending device according to claim 1, characterized in that: The stacking-feeding mechanism (13) includes a first fixed seat (23) fixed on the base (1), the first fixed seat (23) is arranged on the left side of the lower mold seat (4), a third groove (24) is provided on the first fixed seat (23), a second fixed seat (25) is fixed on the right side of the first fixed seat (23), the top surface of the second fixed seat (25) is flush with the bottom surface of the third groove (24), a lifting plate (26) is provided above the first fixed seat (23), the lifting plate (26) is fixed on the piston rod of the second oil cylinder (27), the second oil cylinder (27) is fixed on the top seat (3), a pressing mechanism (28) is fixed on the right end of the top surface of the lifting plate (26), a first stacking trough (29) is provided on the right end of the lower surface of the lifting plate (26), a second stacking trough (30) is provided on the right end of the bottom surface of the third groove (24), and an extrusion mechanism (31) is provided on the left side of the first fixed seat (23).

5. A drawstring bending device according to claim 4, characterized in that: The clamping mechanism (28) includes a longitudinal support plate (32) fixed to the right end of the top surface of the lifting plate (26), a transverse support plate (33) is fixed to the top end of the longitudinal support plate (32), a third oil cylinder (34) is fixed on the transverse support plate (33), and a clamping block (35) is fixed to the end of the piston rod of the third oil cylinder (34); the extrusion mechanism (31) includes a third fixed seat (36) fixed on the base (1), a fourth oil cylinder (37) is fixed on the top surface of the third fixed seat (36), and an extrusion block (38) is fixed to the end of the piston rod of the fourth oil cylinder (37).

6. The drawstring bending device according to claim 1, characterized in that: The upper die (9) includes a fixed block (39) fixedly connected to the upper die base (10), a pressing block (40) integrally formed with the fixed block (39) is fixed at the bottom of the fixed block (39), a cavity (41) is provided at the lower right end of the pressing block (40), a guide post and guide sleeve structure (42) is connected between the upper die base (10) and the lower die base (4), and the guide post and guide sleeve structure (42) is provided with two groups, which include a guide post (43) fixed on the lower die base (4), and the upper end of the guide post (43) is slidably connected to a guide sleeve (44), and the upper end of the guide sleeve (44) is fixed to the upper die base (10).

7. The drawstring bending device according to claim 2, characterized in that: The upper surface of the lower mold (5) is arranged in an inclined shape with the left end higher and the right end lower, the first groove (14) is arranged in an inclined shape with the left end higher and the right end lower, and the bottom surface of the upper mold (9) is arranged in an inclined shape with the left end higher and the right end lower.

8. The drawstring bending device according to claim 3, characterized in that: A sliding groove (45) is provided on the side of the side block (19) away from the main block (18), and a sliding block matching the sliding groove (45) is provided on the fourth embedding groove (21).

9. The drawstring bending device according to claim 4, characterized in that: The first stacking trough (29) includes a first arc segment (46) connected to the bottom surface of the lifting plate (26), the first arc segment (46) is arranged to be inclined toward the upper right, the first arc segment (46) is connected to a horizontal segment (47), the horizontal segment (47) is connected to a second arc segment (48), and the second arc segment (48) is arranged to be inclined toward the lower right.

10. The drawstring bending device according to claim 4, characterized in that: The stopper (8) is provided with a plurality of supporting mechanisms (49), the supporting mechanisms (49) comprising a supporting block (50) fixed in the stopper (8), the supporting block (50) being provided with a plurality of peak-shaped protrusions (51), the peak-shaped protrusions (51) comprising a base portion (52) fixed on the supporting block (50), an elastic layer (53) being fixed on the top surface of the base portion (52), a top portion (54) being fixed on the top surface of the elastic layer (53), a cavity (55) being provided above the supporting block (50), the peak-shaped protrusions (51) being provided in the cavity (55), a portion of the top portion (54) extending out of the cavity (55), and a through hole (56) through which the top portion (54) extends being provided on the top plate of the cavity (55).

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