阅读说明：本技术 一种皮革生产用冲孔模具 (Punching die for leather production ) 是由 任永红 张萌萌 于 2020-04-19 设计创作，主要内容包括：本发明公开了一种皮革生产用冲孔模具,包括工作台和若干模具杆,工作台顶部两端均设置有限位机构,本发明的有益效果：本发明通过支撑块顶部的若干三号螺槽以及加固块上的五号螺槽的搭配实用,方便对若干模具杆进行限位,且二号内螺纹筒以及一号内螺纹筒通过二号螺纹杆的拆卸连接,方便增加或减少模具杆的数量,可以根据使用者的需要来决定模具杆的数量,从而方便更好的对皮革进行冲孔工作；本发明通过限位机构、盖板机构、安装机构对液压杆的支撑限位、限位机构搭配衔接机构以及衔接机构搭配加固机构以及挡板机构,可以使液压杆带动若干模具杆下降的过程中,具有很好的稳定性,避免因限位稳定性较差,导致冲孔不准确,从而造成加工失败的问题。(The invention discloses a punching die for leather production, which comprises a workbench and a plurality of die rods, wherein two ends of the top of the workbench are respectively provided with a limiting mechanism, and the punching die has the beneficial effects that: according to the invention, the plurality of third screw grooves on the top of the supporting block and the five screw grooves on the reinforcing block are matched practically, so that the plurality of die rods are conveniently limited, the second internal thread cylinder and the first internal thread cylinder are detachably connected through the second threaded rod, the number of the die rods is conveniently increased or reduced, the number of the die rods can be determined according to the needs of a user, and the leather can be conveniently and better punched; according to the invention, the hydraulic rod is supported and limited by the limiting mechanism, the cover plate mechanism and the mounting mechanism, the limiting mechanism is matched with the connecting mechanism, the connecting mechanism is matched with the reinforcing mechanism and the baffle plate mechanism, so that the hydraulic rod has good stability in the process of driving the plurality of die rods to descend, and the problem of processing failure caused by inaccurate punching due to poor limiting stability is solved.)

1. The utility model provides a punching die is used in leather production, a serial communication port, including workstation (1) and a plurality of mould pole (9), workstation (1) top both ends all are provided with stop gear (2), two stop gear (2) top all is connected with apron mechanism (3), two the one end that apron mechanism (3) are close to stop gear (2) all is connected with installation mechanism (4), two the one end of apron mechanism (3) is kept away from in installation mechanism (4) and the internally connected has hydraulic stem (5) that is located stop gear (2), two the output of hydraulic stem (5) all is fixed with linking mechanism (6), two be provided with reinforcing mechanism (7) between linking mechanism (6), reinforcing mechanism (7) are located and are provided with baffle mechanism (8) between two stop gear (2).

2. The punching die for leather production as recited in claim 1, wherein each of the two limiting mechanisms (2) comprises a U-shaped frame (21), a moving groove (22), supporting columns (23), a sliding groove (24) and a first screw groove (25), four corners of the bottom end of the inner wall of the U-shaped frame (21) are respectively fixedly connected with the bottoms of the four supporting columns (23), the sliding groove (24) is drilled on one side wall of the four supporting columns (23) close to each other, the first screw groove (25) is drilled at each of the front end and the rear end of each of the two sides of the top of the U-shaped frame (21), and the moving groove (22) is drilled on the side wall of the two U-shaped frames (21) close to each side.

3. The punching die for leather production as recited in claim 1, wherein each of the two cover plate mechanisms (3) comprises a pressing plate (31), a second screw groove (32), a first screw rod (33), a blocking plate (34) and a first handle (35), the two screw grooves (32) are formed in four corners of the top of the pressing plate (31) in a penetrating and chiseling mode, the first screw rod (33) is connected to each of the second screw grooves (32) in a threaded mode, the top of the pressing plate (31) is located between the four second screw grooves (32) and welded to the first handle (35), and the blocking plate (34) is fixed to the bottom of the pressing plate (31) and above each supporting column (23).

4. The punching die for leather production as recited in claim 1, wherein two of the mounting mechanisms (4) each comprise a mounting plate (41), a side plate (42), a T-shaped plate (43), a connecting groove (44) and a limiting bolt (45), the side plates (42) are fixed at both ends of the bottom of the mounting plate (41), the T-shaped plate (43) is inserted between the side walls of the two side plates (42) close to one side, the connecting grooves (44) are drilled through the side walls of the two side plates (42) and the T-shaped plate (43), the limiting bolt (45) is inserted into the connecting groove (44) of the side plate (42), the two side plates (42) and the T-shaped plate (43) are detachably connected through the connecting grooves (44), and the bottom of the connecting groove (44) is fixedly connected with the top of the hydraulic rod (5).

5. The punching die for leather production according to claim 1, wherein each of the two engagement mechanisms (6) comprises an engagement cylinder (61), a connecting rod (62), a sliding block (63), a sleeve (64), a bolt (65), a supporting block (66) and a third screw groove (67), the output end of the hydraulic rod (5) is fixedly connected with the top of the engagement cylinder (61), the connecting rods (62) are welded at four corners of the top end of the outer wall of the engagement cylinder (61), the sliding block (63) is fixed at one end of each connecting rod (62) far away from the engagement cylinder (61), the outer wall of the bottom end of the sliding block (63) is sleeved and connected with the inner wall of the sleeve (64), the bolts (65) are inserted at four corners of the top end of the outer wall of the sleeve (64), two ends of the supporting block (66) respectively penetrate through the two end moving grooves (22) and are positioned inside the U-shaped frame (21) and fixedly connected with the bottom end of the outer wall of the sleeve (64), and a plurality of third screw grooves (67) are drilled through the top part of the supporting block (66) between the two U-shaped frames (21).

6. The punching die for leather production as recited in claim 1, wherein the reinforcing mechanism (7) comprises two U-shaped blocks (71), four screw grooves (72), a threaded adjusting rod (73), a first internal threaded cylinder (74), a reinforcing block (75) and connecting plates (76), the four screw grooves (72) are formed in the bottom ends of the outer walls of the front end and the rear end of each U-shaped block (71) in a penetrating manner, the threaded adjusting rod (73) is connected to the inside of each four screw groove (72) in a threaded manner, the connecting plates (76) are arranged at the top ends of the side walls of the two U-shaped blocks (71) close to one side, the side walls of the two connecting plates (76) close to one side are fixedly connected with the side walls of the reinforcing block (75) respectively, reinforcing bolts (77) are inserted into the front end and the rear end of each reinforcing block (75), and five screw grooves (78) are formed in a penetrating manner at the tops of the reinforcing blocks (75), and a first internal thread cylinder (74) is fixed at the top of each U-shaped block (71).

7. The punching die for leather production as recited in claim 1, wherein the baffle mechanism (8) comprises a stop block (81), a second internal thread cylinder (82), a second screw rod (83) and a baffle (84), the second internal thread cylinder (82) is inserted through both ends of the top of the stop block (81), the second screw rod (83) is connected to both inner walls of the second internal thread cylinder (82) in a threaded manner, and a plurality of baffles (84) are fixed to the bottom of the stop block (81).

8. The punching die for leather production according to claim 1, wherein the punching die for leather production according to claim 1 is characterized in that: every the distance between jam plate (34) bottom to U type frame (21) inner wall bottom is equalling in the distance between support column (23) top to the bottom, and every one end that clamp plate (31) were kept away from in jam plate (34) touches with the top of support column (23) respectively, every one screw rod (33) pass one end of clamp plate (31) four corners No. two thread grooves (32) respectively with U type frame (21) top position assorted thread connection of a thread groove (25).

9. The punching die for leather production according to claim 1, wherein: one end, far away from the connecting rod (62), of each sliding block (63) is in sliding connection with the sliding groove (24) matched in position, and one end, penetrating through the sleeve (64), of each bolt (65) is in threaded connection with the four corners of the bottom end of the outer wall of the connecting cylinder (61) respectively.

10. The punching die for leather production according to claim 1, wherein: the die comprises a plurality of die rods (9), supporting blocks (66) and reinforcing blocks (75), wherein the outer walls of the top end and the bottom end of each die rod (9) are respectively provided with a screw tooth (10), the supporting blocks (66) are respectively in threaded connection with the screw teeth (10) on the outer walls of the bottom ends of the die rods (9) through a plurality of third screw grooves (67) on the top ends, and the reinforcing blocks (75) are respectively in threaded connection with the screw teeth (10) on the outer walls of the top ends of the die rods (9) through a plurality of fifth screw grooves (.

The technical field is as follows:

the invention belongs to the technical field of leather processing equipment, and particularly relates to a punching die for leather production.

Background art:

in the prior art, when a punching die used for leather production is used, only a small number of holes can be punched on leather, and the number of punched holes cannot be increased or reduced according to the needs of a user; and many cut-out press in the in-process that reciprocates of punching a hole, stability is relatively poor to lead to punching a hole the position inaccurate, cause the problem of processing failure, have the disappearance of a certain aspect.

The invention content is as follows:

the present invention has been made to solve the above problems.

In order to solve the above problems, the present invention provides a technical solution:

a punching die for leather production comprises a workbench and a plurality of die rods, wherein limiting mechanisms are arranged at two ends of the top of the workbench, cover plate mechanisms are connected to the tops of the two limiting mechanisms, mounting mechanisms are connected to the ends, close to the limiting mechanisms, of the two cover plate mechanisms, hydraulic rods are connected to the ends, far away from the cover plate mechanisms, of the two mounting mechanisms and located inside the limiting mechanisms, connecting mechanisms are fixed to output ends of the two hydraulic rods, a reinforcing mechanism is arranged between the two connecting mechanisms, and a baffle mechanism is arranged between the two limiting mechanisms of the reinforcing mechanism;

the two limiting mechanisms respectively comprise a U-shaped frame, moving grooves, supporting columns, sliding grooves and a first screw groove, four corners of the bottom end of the inner wall of the U-shaped frame are respectively fixedly connected with the bottoms of the four supporting columns, the side walls, close to the four supporting columns, of the four supporting columns are respectively provided with the sliding grooves in a chiseling mode, the front ends and the rear ends of two sides of the top of the U-shaped frame are respectively provided with the first screw groove in a chiseling mode, and the side walls, close to one side of the two U-shaped frames, of the two;

the two cover plate mechanisms respectively comprise a pressing plate, two screw grooves, a first screw rod, a blocking plate and a first handle, the two screw grooves are formed in four corners of the top of the pressing plate in a penetrating and chiseling mode, the first screw rod is connected to each screw groove in a threaded mode, the top of the pressing plate is located between the four screw grooves and welded to the first handle, and the blocking plate is fixed to the bottom of the pressing plate and located above each supporting column;

the two mounting mechanisms respectively comprise a mounting plate, side plates, T-shaped plates, connecting grooves and limiting bolts, the side plates are fixed at two ends of the bottom of the mounting plate, the T-shaped plates are inserted between the side walls of the two side plates close to one side, the connecting grooves are drilled through the side walls of the two side plates and the T-shaped plates, the limiting bolts are inserted into the connecting grooves of one side plate, the two side plates and the T-shaped plates are detachably connected through the connecting grooves respectively, and the bottoms of the connecting grooves are fixedly connected with the tops of the hydraulic rods;

the two linking mechanisms respectively comprise a linking barrel, connecting rods, sliders, sleeves, bolts, supporting blocks and three screw grooves, the output ends of the hydraulic rods are fixedly connected with the tops of the linking barrels, the four corners of the top end of the outer wall of the linking barrel are welded with the connecting rods, one end, away from the linking barrel, of each connecting rod is fixedly provided with the slider, the outer wall of the bottom end of each slider is sleeved and connected with the inner wall of each sleeve, the four corners of the top end of the outer wall of each sleeve are inserted with the bolts, two ends of each supporting block respectively penetrate through the two end moving grooves and are positioned inside the U-shaped frames and fixedly connected with the bottoms of the outer walls of the sleeves, and the tops, positioned between the two U-shaped frames, of the supporting blocks are provided;

the reinforcing mechanism comprises two U-shaped blocks, four screw grooves, a thread adjusting rod, a first internal thread cylinder, a reinforcing block and connecting plates, the four screw grooves are formed in the bottom ends of the outer walls of the front end and the rear end of each U-shaped block in a penetrating mode, the thread adjusting rod is connected to the inner portion of each four screw groove in a threaded mode, the connecting plates are arranged on the top ends of the side walls, close to one side, of the two U-shaped blocks, the side walls, close to the two connecting plates, of one side are fixedly connected with the side walls, on the two sides, of the reinforcing block, reinforcing bolts are inserted into the two connecting plates, the two connecting plates are located at the front end and the rear end of the reinforcing block, the five screw grooves are formed in the penetrating mode in the top of the;

the baffle mechanism comprises a stop block, a second internal thread cylinder, a second screw rod and a baffle, wherein the second internal thread cylinder is arranged at two ends of the top of the stop block in a penetrating and inserting mode, the second internal thread cylinder is arranged on the inner wall of the second internal thread cylinder in a threaded connection mode, and the baffle is fixed at the bottom of the stop block.

Preferably, the distance between the bottom of each blocking plate and the bottom end of the inner wall of the U-shaped frame is equal to the distance between the top of the support column and the bottom of the U-shaped frame, one end, far away from the pressing plate, of each blocking plate is in contact with the top of the support column respectively, and one end, penetrating through the two screw grooves in the four corners of the pressing plate, of each screw rod is in threaded connection with the first screw groove matched with the top of the U-shaped frame respectively.

Preferably, the position and the inner diameter of each connecting groove are matched one by one.

Preferably, one end, far away from the connecting rod, of each sliding block is in sliding connection with the sliding groove matched in position, and one end, penetrating through the sleeve, of each bolt is in threaded connection with the four corners of the bottom end of the outer wall of the connecting cylinder.

Preferably, the inner walls of the U-shaped blocks at two sides are sleeved on the outer walls at two ends of the supporting block, the outer diameters of the supporting block are respectively matched with the inner diameter of the U-shaped block, and the two connecting plates are respectively in threaded connection with the side wall at the top end of the U-shaped block through reinforcing bolts at the front end and the rear end.

Preferably, one end of each of the two second screw rods penetrating through the second internal thread cylinder is in threaded connection with the inner wall of the first internal thread cylinder in a position matched with the second internal thread cylinder.

Preferably, the inner diameter, the number and the position of each third screw groove are respectively matched with the inner diameter, the number and the position of each fifth screw groove one by one.

Preferably, the outer walls of the top end and the bottom end of each mold rod are provided with screw teeth, the supporting block is in threaded connection with the screw teeth on the outer wall of the bottom end of each mold rod through a plurality of third screw grooves in the top, and the reinforcing block is in threaded connection with the screw teeth on the outer wall of the top end of each mold rod through a plurality of fifth screw grooves in the top.

Preferably, the top of each mold rod is in contact with the bottom of the baffle plate, and a second handle is fixed to the tops of each first screw and each second screw.

The invention has the beneficial effects that:

according to the invention, the plurality of third screw grooves on the top of the supporting block and the five screw grooves on the reinforcing block are matched practically, so that the plurality of die rods are conveniently limited, the second internal thread cylinder and the first internal thread cylinder are detachably connected through the second threaded rod, the number of the die rods is conveniently increased or reduced, the number of the die rods can be determined according to the needs of a user, and the leather can be conveniently and better punched;

according to the invention, the hydraulic rod is supported and limited by the limiting mechanism, the cover plate mechanism and the mounting mechanism, the limiting mechanism is matched with the connecting mechanism, the connecting mechanism is matched with the reinforcing mechanism and the baffle plate mechanism, so that the hydraulic rod has good stability in the process of driving the plurality of die rods to descend, and the problem of processing failure caused by inaccurate punching due to poor limiting stability is solved.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of a spacing mechanism according to the present invention;

FIG. 3 is a schematic perspective view of the cover plate mechanism of the present invention after being turned over;

FIG. 4 is a schematic view of a disassembled structure of the mounting mechanism of the present invention;

FIG. 5 is a schematic top view of a portion of the engagement mechanism of the present invention;

FIG. 6 is a schematic view of the connection between the support block and the U-shaped block according to the present invention;

FIG. 7 is a schematic structural diagram of a fifth spiral groove according to the present invention;

FIG. 8 is a schematic perspective view of the inverted baffle mechanism of the present invention;

FIG. 9 is a schematic view of the structure of the mold bar of the present invention.

In the figure: 1. a work table; 2. a limiting mechanism; 21. a U-shaped frame; 22. a moving groove; 23. a support pillar; 24. a chute; 25. a first spiral groove; 3. a cover plate mechanism; 31. pressing a plate; 32. a second spiral groove; 33. a first screw rod; 34. a blocking plate; 35. a first handle; 4. an installation mechanism; 41. mounting a plate; 42. a side plate; 43. a T-shaped plate; 44. connecting grooves; 45. a limit bolt; 5. a hydraulic lever; 6. a joining mechanism; 61. a joining cylinder; 62. a connecting rod; 63. a slider; 64. a sleeve; 65. a bolt; 66. a support block; 67. a third spiral groove; 7. a reinforcement mechanism; 71. a U-shaped block; 72. a fourth spiral groove; 73. a threaded adjusting rod; 74. a first internal thread cylinder; 75. a reinforcing block; 76. a connecting plate; 77. reinforcing the bolt; 78. a fifth spiral groove; 8. a baffle mechanism; 81. a stopper; 82. a second internal thread cylinder; 83. a second screw; 84. a baffle plate; 9. a mold bar; 10. screw teeth; 11. and a second handle.

The specific implementation mode is as follows:

as shown in fig. 1 to 9, the following technical solutions are adopted in the present embodiment: a punching die for leather production comprises a workbench 1 and a plurality of die rods 9, wherein two ends of the top of the workbench 1 are respectively provided with a limiting mechanism 2, the tops of the two limiting mechanisms 2 are respectively connected with a cover plate mechanism 3, one end, close to the limiting mechanism 2, of each cover plate mechanism 3 is connected with an installation mechanism 4, one end, far away from the cover plate mechanism 3, of each installation mechanism 4 is located inside the limiting mechanism 2 and is connected with a hydraulic rod 5, the output ends of the two hydraulic rods 5 are respectively fixed with a connecting mechanism 6, a reinforcing mechanism 7 is arranged between the two connecting mechanisms 6, and a baffle mechanism 8 is arranged between the two limiting mechanisms 2 of the reinforcing mechanism 7;

the two limiting mechanisms 2 respectively comprise a U-shaped frame 21, moving grooves 22, supporting columns 23, sliding grooves 24 and a first screw groove 25, four corners of the bottom end of the inner wall of the U-shaped frame 21 are respectively and fixedly connected with the bottoms of the four supporting columns 23, the sliding grooves 24 are drilled on the side walls, close to the four supporting columns 23, of the two sides of the top of the U-shaped frame 21, the first screw grooves 25 are drilled at the front end and the rear end of the two sides of the top of the U-shaped frame 21, and the moving grooves 22 are drilled on the side walls, close to the two sides of the two U-shaped frames 21;

the two cover plate mechanisms 3 respectively comprise a pressure plate 31, a second screw groove 32, a first screw 33, a blocking plate 34 and a first handle 35, the second screw grooves 32 are drilled at four corners of the top of the pressure plate 31, the first screw 33 is connected in each second screw groove 32 in a threaded manner, the top of the pressure plate 31 is positioned between the four second screw grooves 32 and welded with the first handle 35, and the blocking plate 34 is fixed at the bottom of the pressure plate 31 and above each support column 23;

the two installation mechanisms 4 respectively comprise an installation plate 41, side plates 42, T-shaped plates 43, connecting grooves 44 and limiting bolts 45, the side plates 42 are fixed at two ends of the bottom of the installation plate 41, the T-shaped plates 43 are inserted between the side walls of the two side plates 42 close to one side, the connecting grooves 44 are drilled through the side walls of the two side plates 42 and the T-shaped plates 43, the limiting bolts 45 are inserted into the connecting grooves 44 of one side plate 42, the two side plates 42 and the T-shaped plates 43 are detachably connected through the connecting grooves 44 respectively, and the bottoms of the connecting grooves 44 are fixedly connected with the top of the hydraulic rod 5;

the two connecting mechanisms 6 respectively comprise a connecting cylinder 61, connecting rods 62, sliding blocks 63, sleeves 64, bolts 65, supporting blocks 66 and three screw grooves 67, the output end of the hydraulic rod 5 is fixedly connected with the top of the connecting cylinder 61, the connecting rods 62 are welded at four corners of the top end of the outer wall of the connecting cylinder 61, the sliding block 63 is fixed at one end, away from the connecting cylinder 61, of each connecting rod 62, the outer wall of the bottom end of each sliding block 63 is sleeved and connected with the inner wall of the corresponding sleeve 64, the bolts 65 are inserted at four corners of the top end of the outer wall of each sleeve 64, two ends of each supporting block 66 respectively penetrate through the two-end moving grooves 22 and are positioned inside the U-shaped frames 21 and fixedly connected with the bottom ends of the outer walls of the corresponding sleeves 64, and a plurality of three screw grooves 67 are drilled through the top portion, positioned between the;

the reinforcing mechanism 7 comprises two U-shaped blocks 71, four screw grooves 72, a thread adjusting rod 73, a first internal thread cylinder 74, a reinforcing block 75 and connecting plates 76, the four screw grooves 72 are formed in the bottom ends of the outer walls of the front end and the rear end of each U-shaped block 71 in a penetrating mode, the thread adjusting rod 73 is connected to the inner portion of each four screw groove 72 in a threaded mode, the connecting plates 76 are arranged at the top ends of the side walls, close to one side, of the two U-shaped blocks 71, the side walls, close to the two connecting plates 76, of one side are fixedly connected with the side walls, close to the two reinforcing blocks 75, reinforcing bolts 77 are inserted into the front end and the rear end of each connecting plate 76, the five screw grooves 78 are formed in the top of each reinforcing block 75 in a penetrating mode, and the first internal thread cylinder 74 is fixed to the top of each;

baffle mechanism 8 includes a dog 81, No. two internal thread section of thick bamboos 82, No. two screws 83 and baffle 84, dog 81 top both ends all run through to insert and are equipped with No. two internal thread section of thick bamboos 82, two No. two equal threaded connection of internal thread section of thick bamboo 82 inner wall has No. two screws 83, the bottom of dog 81 is fixed with a plurality of baffles 84.

The distance between the bottom of each blocking plate 34 and the bottom end of the inner wall of the U-shaped frame 21 is equal to the distance between the top of each supporting column 23 and the bottom of each supporting column 23, one end, away from the pressing plate 31, of each blocking plate 34 is in contact with the top of each supporting column 23, and one end, penetrating through the two screw grooves 32 in the four corners of the pressing plate 31, of each screw rod 33 is in threaded connection with the screw groove 25, matched with the top of the U-shaped frame 21, of each screw rod 33.

Wherein, the position and the inner diameter of each connecting groove 44 are matched one by one.

One end of each sliding block 63, which is far away from the connecting rod 62, is in sliding connection with the sliding groove 24 matched in position, and one end of each bolt 65, which penetrates through the sleeve 64, is in threaded connection with the four corners of the bottom end of the outer wall of the connecting cylinder 61.

The inner walls of the U-shaped blocks 71 on two sides are sleeved on the outer walls of two ends of the supporting block 66, the outer diameter of the supporting block 66 is matched with the inner diameter of the U-shaped block 71, and the two connecting plates 76 are in threaded connection with the side wall of the top end of the U-shaped block 71 through reinforcing bolts 77 at the front end and the rear end.

One end of each of the two second screws 83 penetrating through the second internal thread cylinder 82 is in threaded connection with the inner wall of the first internal thread cylinder 74 in a matched position.

The inner diameter, the number and the position of each third screw groove 67 are respectively matched with the inner diameter, the number and the position of the fifth screw groove 78 one by one.

The outer walls of the top end and the bottom end of each die rod 9 are provided with screw teeth 10, the supporting block 66 is in threaded connection with the screw teeth 10 on the outer wall of the bottom end of each die rod 9 through a plurality of third screw grooves 67 on the top, and the reinforcing block 75 is in threaded connection with the screw teeth 10 on the outer wall of the top end of each die rod 9 through a plurality of fifth screw grooves 78 on the top.

The top of each mold rod 9 is in contact with the bottom of the baffle 84, and a second handle 11 is fixed to the tops of each first screw 33 and each second screw 83.

Specifically, the method comprises the following steps: the hydraulic rods 5 on two sides drive the linking cylinder 61 to descend, the sleeve 64 is connected with the screw thread of the linking cylinder 61 through the bolts 65 at four corners, so that the linking cylinder 61 drives the sleeve 64 to descend together, in the descending process, the slide block 63 at one end of the four-corner connecting rod 62 slides in the slide groove 24 of the supporting column 23 to increase the stability in descending, the descending of the sleeve 64 drives the supporting block 66 to descend, the two screw thread adjusting rods 73 penetrate through one end of the four screw grooves 72 to be tightly contacted with the outer walls of the front and rear ends of the supporting block 66, the descending of the supporting block 66 drives the reinforcing mechanism 7 and the baffle mechanism 8 to descend together, as the die rods 9 are respectively in threaded connection with the five screw grooves 78 on the reinforcing block 75 and the three screw grooves 67 on the supporting block 66 through the screw teeth 10 at the top end and the bottom end, so as to drive a plurality of die rods 9 to descend together, so, and the supporting block 66 is conveniently moved through the moving groove 22 as the hydraulic rod 5 is operated to ascend or descend; when the number of the die rods 9 needs to be reduced, the two handles 11 drive the two screw rods 83 to rotate, so that the bottom ends of the two screw rods 83 are separated from the first internal thread cylinders 74 in a threaded manner, the baffle plates 84 are not in contact with the tops of the die rods 9, according to the requirements of users, the die rods 9 with fixed number are separated from the reinforcing blocks 75 and the supporting blocks 66 through rotation, the baffle plates 84 are in contact with the tops of the rest die rods 9 again, the two screw rods 83 in the two second internal thread cylinders 82 penetrate through the second internal thread cylinders 82 to be connected with the internal threads of the first internal thread cylinders 74, and the reduction or increase of the number of the die rods 9 can be completed.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.