CN213923411U

CN213923411U - Belt coiled material closing device

Info

Publication number: CN213923411U
Application number: CN202023038099.4U
Authority: CN
Inventors: 姜忠良; 王辉
Original assignee: Yantai Jinwei Hardware Co ltd
Current assignee: Yantai Jinwei Hardware Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-08-10
Anticipated expiration: 2030-12-16

Abstract

The application relates to a belt coiled material closing device, it includes the support frame, rotates along the horizontal direction on the support frame and is connected with the wind-up roll, is equipped with the squeeze roll that is on a parallel with the wind-up roll on the support frame, its characterized in that: the outer coaxial cover of wind-up roll is equipped with a plurality of grip blocks, grip block and wind-up roll sliding connection, the cover is equipped with a plurality of compressing tightly of being parallel to each other on the squeeze roll, compress tightly a and squeeze roll sliding connection, per two compress tightly all are equipped with a grip block between the piece, the adjustment tank has been seted up along the axis direction on the squeeze roll outer wall, compress tightly a and adjustment tank sliding connection, all be equipped with the locking disc between the adjacent grip block, locking disc and wind-up roll sliding connection, the locking mouth has been seted up along the axis direction on the locking disc, compress tightly one end and offset with the locking disc outer wall. This application has the effect that makes coiled material closing device can compress tightly many coiled materials simultaneously.

Description

Belt coiled material closing device

Technical Field

The application relates to the field of coiled material production equipment, in particular to a belt type coiled material pressing device.

Background

The coiled material is a continuously coiled steel material and is divided into a plate coil and a coil, the condition that the coiled material becomes loose frequently occurs in the production process of the existing coiled material, if the coiled material is not processed in time, the coiled material is piled up a lot until finally becoming uncontrollable, and the waste of the coiled material is caused.

The current chinese patent with publication number CN211733292U discloses a coiled material pressing device, including setting up in the coiled material winding wheel of support, the horizontal side of coiled material winding wheel is provided with the pinch roller, and the axial and the coiled material winding wheel axial of pinch roller are parallel, and the both ends of pinch roller are provided with the rail wheel respectively, fixedly on the support being provided with the slope track, and the rail wheel moves on the track, and orbital tendency makes the rail wheel move to the direction that is close to coiled material winding wheel.

In view of the above-mentioned related art, the inventor found that when the coiled material pressing device needs to simultaneously press a plurality of coiled materials during use, the plurality of coiled materials may shift during winding, and there is a defect that the plurality of coiled materials are difficult to be wound up neatly.

SUMMERY OF THE UTILITY MODEL

In order to make coiled material closing device can compress tightly many coiled materials simultaneously, make many coiled materials by neatly rolling in step, this application provides a belt coiled material closing device.

The application provides a belt coiled material closing device adopts following technical scheme:

the utility model provides a belt coiled material closing device, includes the support frame, rotates along the horizontal direction on the support frame and is connected with the wind-up roll, rotates on the support frame and is connected with the squeeze roll that is on a parallel with the wind-up roll, its characterized in that: the outer coaxial cover of wind-up roll is equipped with a plurality of grip blocks, all is equipped with the locking disc between the adjacent grip block, has seted up the locking mouth along the axis direction on the locking disc, grip block and locking disc all with wind-up roll sliding connection, the cover is equipped with a plurality of compressing tightly of being parallel to each other on the squeeze roll, has seted up the adjustment tank along the axis direction on the squeeze roll outer wall, compresses tightly a and adjustment tank sliding connection.

Through adopting above-mentioned technical scheme, the support frame plays limiting displacement to wind-up roll and squeeze roll, the wind-up roll is got up the coiled material rolling, the squeeze roll compresses tightly the coiled material, when closing device compresses tightly a plurality of coiled materials, in the locking mouth was arranged in to the one end of coiled material, the locking disc couples together coiled material and wind-up roll, the grip block is fixed the coiled material on relative position, when the coiled material rotated around the wind-up roll, the grip block made the difficult emergence skew of coiled material rolling in-process, the compressing tightly piece compresses tightly the outer winding coiled material of locking disc, slide on the squeeze roll through making compressing tightly, change the interval between the compressing tightly piece and make compressing tightly the piece compress tightly the operation to the coiled material of different width, and then make coiled material closing device compress tightly many coiled materials simultaneously, make many coiled materials neatly synchronous rolling up.

Optionally, a sliding groove is formed in the outer wall of the winding roller, and the clamping plate and the locking disc are both connected with the sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, the sliding direction of grip block and locking disc is injectd to the sliding tray, makes grip block and locking disc more fixed on the wind-up roll slip orbit, and when the wind-up roll rotated, grip block and locking disc were difficult for taking place the skew with the wind-up roll.

Optionally, an adjusting block located between adjacent pressing pieces is arranged in the adjusting groove, the adjusting block is connected in the adjusting groove in a sliding mode along the radial direction of the squeeze roller, two adjusting connecting rods are connected to the adjusting block in a rotating mode, and the end portions, far away from the adjusting block, of the two adjusting connecting rods are respectively connected with the adjacent two pressing pieces in a rotating mode.

Through adopting above-mentioned technical scheme, change the position of regulating block, make the regulating block along the radial slip of squeeze roll, the regulating block drives the contained angle change between the adjusting link, and adjusting link and then makes adjacent piece interval that compresses tightly change, realizes compressing tightly the regulatory function of interval between the piece, makes to compress tightly the piece and can carry out the extrusion operation to the coiled material of different width.

Optionally, a synchronizing rod is connected in the adjusting groove in a sliding manner along the radial direction of the squeezing roller, and the synchronizing rod penetrates through the adjusting block and is connected with the adjusting block in a sliding manner.

Through adopting above-mentioned technical scheme, the synchronizing bar couples together a plurality of regulating blocks, realizes a plurality of regulating blocks synchronous motion through removing the synchronizing bar, realizes compressing tightly the synchronous control of interval between the piece.

Optionally, an adjusting knob penetrates through the end face, far away from the support frame, of the extrusion roller along the axial direction, an adjusting gear perpendicular to the axial direction of the extrusion roller is fixedly arranged at one end of the adjusting knob, an adjusting rack perpendicular to the synchronizing rod is fixedly arranged at one end of the synchronizing rod, and the adjusting gear is meshed with the adjusting rack.

Through adopting above-mentioned technical scheme, rotate adjust knob and make adjusting gear rotate, the drive of rotating gear is adjusted the rack, and adjust knob makes the interval between the piece that compresses tightly adjust more portably.

Optionally, an inserting strip is fixedly arranged on the end face of the adjusting knob, a plurality of inserting holes are formed in the extruding roller around the circle center of the adjusting knob, and the inserting strip is connected with the inserting holes in a sliding mode.

Through adopting above-mentioned technical scheme, when compressing tightly on the piece removes required position, insert the jack with the cutting, the cutting makes adjust knob fix on required position more firmly with the jack cooperation.

Optionally, one end of the squeeze roller, which is far away from the adjusting knob, is provided with a synchronizing gear, the synchronizing gear is fixedly connected with the adjusting gear through a linkage rod which is axially arranged along the squeeze roller, one end of the synchronizing rod is fixedly provided with a synchronizing rack which is parallel to the adjusting rack, and the synchronizing gear is meshed with the synchronizing rack.

Through adopting above-mentioned technical scheme, the trace makes adjusting gear and synchronous gear synchronous rotation, and synchronous gear drives synchronous rack and goes up and down, realizes adjusting rack and synchronous rack's synchronous motion, and adjusting rack and synchronous rack remove the synchronizing bar from the synchronizing bar both ends, make the removal of synchronizing bar more firm, difficult emergence relative deviation.

Optionally, an extrusion spring located between the adjacent pressing pieces is arranged on the outer wall of the extrusion roller along the axial direction of the extrusion roller, and two ends of the extrusion spring are respectively and fixedly connected with the adjacent pressing pieces.

Through adopting above-mentioned technical scheme, extrusion spring deformation is dragged and is pressed the piece, and extrusion spring makes the distance between the adjacent piece that compresses tightly can remove along with adjusting the connecting rod better.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the support frame has a limiting effect on the winding roller and the extrusion roller, the winding roller winds up coiled materials, the extrusion roller compresses the coiled materials, when the compressing device compresses a plurality of coiled materials, one end of the coiled materials is arranged in the locking port, the locking disc connects the coiled materials with the winding roller, the clamping plate fixes the coiled materials at relative positions, when the coiled materials rotate around the winding roller, the clamping plate enables the coiled materials not to easily deviate in the winding process, the compressing piece compresses the coiled materials wound outside the locking disc, the spacing between the compressing pieces is changed by enabling the compressing pieces to slide on the extrusion roller, so that the compressing pieces compress the coiled materials with different widths, the coiled material compressing device can simultaneously compress a plurality of coiled materials, and the coiled materials are wound up in order and synchronously;

2. the sliding grooves limit the sliding direction of the clamping plate and the locking disc, so that the sliding tracks of the clamping plate and the locking disc on the winding roller are more fixed, and the clamping plate and the locking disc are not easy to deviate from the winding roller when the winding roller rotates;

3. the position of change regulating block makes the radial slip of regulating block along the squeeze roll, and the regulating block drives the contained angle change between the adjusting link, and adjusting link and then making adjacent compressing tightly a interval change, realizes compressing tightly the regulatory function of interval between the piece, makes to compress tightly the piece and can extrude the operation to the coiled material of different width.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic view of the structure of the locking port and the locking disk in the embodiment of the present application.

FIG. 3 is a cross-sectional view of an adjustment block and an adjustment link in an embodiment of the present application.

Fig. 4 is a sectional view of an adjustment rack and an adjustment gear in an embodiment of the present application.

Description of reference numerals: 1. a support frame; 2. a wind-up roll; 3. a squeeze roll; 4. a clamping plate; 5. locking the disc; 6. a locking port; 7. a compression member; 8. an adjustment groove; 9. a sliding groove; 10. an adjusting block; 11. adjusting the connecting rod; 12. a synchronization lever; 13. adjusting a knob; 14. an adjusting gear; 15. adjusting the rack; 16. cutting; 17. a jack; 18. a synchronous rack; 19. a synchronizing gear; 21. a compression spring; 22. extruding the roller; 24. an extrusion cylinder; 25. a linkage rod.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses belt coiled material closing device, refer to fig. 1, including support frame 1, rotate along the horizontal direction on the support frame 1 and be connected with wind-up roll 2, be equipped with the squeeze roll 3 that is on a parallel with wind-up roll 2 on the support frame 1. Support frame 1 supports wind-up roll 2 and squeeze roll 3 and plays limiting displacement to wind-up roll 2 and squeeze roll 3, and wind-up roll 2 is rotatory to be rotated the coiled material and is rolled up, and squeeze roll 3 compresses tightly the operation to the coiled material, realizes coiled material closing device's basic function.

Referring to fig. 1, the outer coaxial cover of wind-up roll 2 is equipped with six grip blocks 4, and grip block 4 is the annular shape, and the internal diameter of grip block 4 is the same with the external diameter of wind-up roll 2, grip block 4 and wind-up roll 2 sliding connection. The coiled material to be processed is arranged between the adjacent clamping plates 4, the clamping plates 4 fix the coiled material at opposite positions through extruding two ends of the coiled material, and when the coiled material rotates around the winding roller 2, the clamping plates 4 enable the coiled material to be difficult to shift in the winding process.

Referring to fig. 1, a sliding groove 9 is formed in the outer wall of the winding roller 2 along the axis direction, and the clamping plate 4 is connected with the sliding groove 9 in a sliding mode. When the clamping plate 4 is arranged on the winding roller 2 to slide, the sliding direction of the clamping plate 4 is limited by the sliding groove 9, the sliding track of the clamping plate 4 on the winding roller 2 is fixed by the sliding groove 9, and when the winding roller 2 rotates, the clamping plate 4 is not prone to shifting from the winding roller 2.

Referring to fig. 1, a locking disc 5 is coaxially arranged between every two adjacent clamping plates 4, a cylindrical positioning ring is coaxially and fixedly arranged on the inner wall of the locking disc 5, and the locking disc 5 is slidably connected with the winding roller 2 through the positioning ring. When the pressing device is used, a coiled material to be processed is wound on the outer wall of the locking disc 5, the positioning ring plays a role in fixing the locking disc 5 when the locking disc 5 rotates, the locking disc 5 always keeps rotating coaxially with the winding roller 2, and the possibility of untidy coiling of the coiled material caused by the deviation of the locking disc 5 is reduced to a certain extent.

Referring to fig. 1 and 2, the locking disc 5 is provided with a locking port 6 along an axial direction. When closing device compressed tightly a plurality of coiled materials, the user arranged the one end of coiled material in the locking mouth 6 earlier, made the coiled material laminate mutually with the outer wall of locking disc 5 again, realized being connected of coiled material and locking disc 5, locking disc 5 was connected coiled material and wind-up roll 2, made wind-up roll 2 drive many coiled materials synchronous rotation better.

Referring to fig. 1 and 2, the locking disk 5 is slidably coupled to the sliding groove 9 by a retaining ring. The slip direction of holding ring is injectd to sliding tray 9, makes the slip orbit of holding ring on wind-up roll 2 more fixed, and then has realized the relative stability of 5 slip orbits of locking disc, and when wind-up roll 2 rotated, the skew takes place for locking disc 5 is difficult with wind-up roll 2, and then makes the coiled material better by the rolling on 5 outer walls of locking disc.

Referring to fig. 1 and 2, five pressing pieces 7 parallel to each other are sleeved on the squeeze roller 3, and when the wind-up roller 2 is in an idle state, one end of each pressing piece 7 abuts against the locking disc 5. When the locking disc 5 drives the coiled material to be wound to rotate, one end of the pressing piece 7 is always abutted to the outer wall of the coiled material wound outside the locking disc 5, so that the gaps left between the coiled materials in the coiling process of the coiled material are less.

Referring to fig. 1 and 2, a squeezing cylinder 24 is fixedly arranged on the support frame 1 along the vertical direction, and an output shaft of the squeezing cylinder 24 is rotatably connected with one end of the squeezing roller 3. The output shaft of the extrusion cylinder 24 stretches and retracts to drive the extrusion roller 3 to rotate, so that the connection state of the winding roller 2 and the pressing piece 7 is changed, and the adjustment and the replacement of the locking disc 5 and the clamping plate 4 are simpler and more convenient.

With reference to fig. 1 and 2, the pressing member 7 comprises a squeezing roller 22, by means of which the pressing member 7 abuts against the outer wall of the web. When the pressing piece 7 presses the coiled material, the extrusion roller 22 is arranged outside the coiled material to roll, and the extrusion roller 22 changes the original sliding friction into rolling friction, so that the outer wall of the coiled material is not easily abraded when the pressing piece 7 presses the coiled material.

Referring to fig. 1 and 2, an adjusting groove 8 is formed in the outer wall of the squeezing roller 3, and the pressing piece 7 is slidably connected with the adjusting groove 8. When the coiled material width of handling is different, remove to compress tightly 7 and make to compress tightly 7 and arrange in that adjustment tank 8 slides, and then make to compress tightly 7 and slide on squeeze roll 3, change the interval between compressing tightly 7 and make to compress tightly 7 and compress tightly the operation to the coiled material of different width, and then make coiled material closing device can compress tightly many coiled materials simultaneously, make many coiled materials by neatly rolling in step.

Referring to fig. 3, an adjusting block 10 located between the adjacent pressing pieces 7 is arranged in the adjusting groove 8, the adjusting block 10 is connected in the adjusting groove 8 along the radial direction of the squeeze roll 3 in a sliding manner, two adjusting connecting rods 11 are rotatably connected to the adjusting block 10, and the end parts, far away from the adjusting block 10, of the two adjusting connecting rods 11 are respectively rotatably connected with the adjacent two pressing pieces 7. When the distance between the pressing pieces 7 needs to be adjusted, the position of the adjusting block 10 is changed, the adjusting block 10 slides along the radial direction of the squeeze roll 3, the adjusting block 10 drives the included angle between the adjusting connecting rods 11 to change, the adjusting connecting rods 11 further change the distance between the adjacent pressing pieces 7, the adjusting function of the distance between the pressing pieces 7 is realized, and the pressing pieces 7 can extrude coiled materials with different widths.

Referring to fig. 3, a prism-shaped synchronization rod 12 is slidably connected to the inside of the adjustment groove 8 along the radial direction of the squeeze roll 3, and the synchronization rod 12 penetrates through the plurality of adjustment blocks 10 and is slidably connected to the adjustment blocks 10. The synchronous rod 12 connects the plurality of adjusting blocks 10, and the synchronous movement of the plurality of adjusting blocks 10 is realized by moving the synchronous rod 12, so that the synchronous adjustment of the space between the pressing pieces 7 is realized.

Referring to fig. 3 and 4, a disc-shaped adjusting knob 13 axially penetrates through the end surface of the squeeze roller 3, an adjusting gear 14 is coaxially and fixedly arranged at the center of the adjusting knob 13, an adjusting rack 15 is fixedly arranged at one end of the synchronizing rod 12 along the axial direction of the squeeze roller 3, and the adjusting gear 14 is meshed with the adjusting rack 15. The adjusting knob 13 is rotated to drive the adjusting gear 14 to rotate, the rotating gear rotates to drive the adjusting rack 15 to move along the vertical direction, the adjusting rack 15 moves up and down to drive the synchronizing rod 12 to move up and down, the height of the synchronizing rod 12 is further changed, and the adjusting knob 13 enables the synchronizing rod 12 to adjust the distance between the pressing pieces 7 more conveniently.

Referring to fig. 3 and 4, the end surface of the adjusting knob 13 is fixedly provided with an inserting strip 16 along the axial direction, the extrusion roller 3 is provided with a plurality of inserting holes 17 around the center of the adjusting knob 13, and the inserting strip 16 is connected with the inserting holes 17 in a sliding manner. Before the adjusting knob 13 is rotated, the inserting strip 16 is firstly slid and pulled out from the inserting hole 17, after the adjusting knob 13 is rotated to enable the pressing piece 7 to move to a required position, the inserting strip 16 is inserted into the inserting hole 17, and the inserting strip 16 is matched with the inserting hole 17 to enable the adjusting knob 13 to more stably fix the pressing piece 7 at the required position.

Referring to fig. 3 and 4, a synchronizing gear 19 is arranged at one end of the squeezing roller 3 away from the adjusting knob 13, a synchronizing rack 18 parallel to the adjusting rack 15 is fixedly arranged at one end of the synchronizing rod 12, and the synchronizing gear 19 is meshed with the synchronizing rack 18. When the adjusting rack 15 drives the synchronizing rod 12 to move, the adjusting rack 15 and the synchronizing rack 18 move the synchronizing rod 12 from two ends of the synchronizing rod 12, so that the synchronizing rod 12 moves more stably and is not easy to shift relatively.

Referring to fig. 3 and 4, the synchronizing gear 19 is fixedly connected with the adjusting gear 14 through a linkage rod 25 axially arranged along the squeezing roller 3, and two ends of the linkage rod 25 are respectively fixedly connected with the synchronizing gear 19 and the center of the adjusting gear 14. When the adjusting gear 14 rotates, the linkage rod 25 enables the adjusting gear 14 and the synchronizing gear 19 to synchronously rotate, the adjusting gear 14 drives the adjusting rack 15 to ascend and descend, the synchronizing gear 19 drives the synchronizing rack 18 to ascend and descend, synchronous movement of the adjusting rack 15 and the synchronizing rack 18 is achieved, and then synchronous movement of two ends of the synchronizing rod 12 is better achieved.

Referring to fig. 3 and 4, the outer wall of the squeeze roll 3 is provided with a squeeze spring 21 located between adjacent pressing pieces 7 along the axial direction of the squeeze roll 3, both ends of the squeeze spring 21 are respectively fixedly connected with the adjacent pressing pieces 7, and when the distance between the pressing pieces 7 is at the maximum position, the squeeze spring 21 is in a normal state. When the distance between the pressing pieces 7 becomes smaller, the pressing spring 21 is elastically deformed, and when the distance between the pressing pieces 7 becomes larger, the pressing spring 21 is restored to push the pressing pieces 7, and the pressing spring 21 enables the distance between the adjacent pressing pieces 7 to better move along with the adjusting link 11.

The implementation principle of the belt type coiled material pressing device in the embodiment of the application is as follows: when using coiled material closing device, arrange coiled material one end in locking mouth 6, locking disc 5 makes the coiled material connect on the outer wall of wind-up roll 2, grip block 4 carries out the centre gripping to the coiled material, extrusion motor 24 control impression roller rotates, make and compress tightly 7 and arrange in between grip block 4, squeeze roller 22 extrudees the operation to the coiled material, when compressing tightly the operation to the coiled material of different width, it drives adjusting gear 14 and rotates to rotate adjust knob 13, adjusting gear 14 drives synchronous gear 19 through trace 25 and rotates, and then make adjusting rack 15 and synchronous rack 18 synchronous motion, realize the regulation of synchronizing bar 12, synchronizing bar 12 removes and drives regulating block 10 and remove, and then change the contained angle between adjusting link 11, realize compressing tightly the regulation of the distance between the 7, and then make coiled material closing device enable many coiled materials to be neatly rolled up in step.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a belt coiled material closing device, includes support frame (1), rotates along the horizontal direction on support frame (1) and is connected with wind-up roll (2), rotates squeeze roll (3) that are connected with and are on a parallel with wind-up roll (2) on support frame (1), its characterized in that: a plurality of clamping plates (4) are coaxially sleeved outside the winding roller (2), a locking disc (5) is arranged between every two adjacent clamping plates (4), a locking port (6) is formed in the locking disc (5) along the axis direction, the clamping plates (4) and the locking disc (5) are connected with the winding roller (2) in a sliding mode, a plurality of pressing pieces (7) which are parallel to each other are sleeved on the extrusion roller (3), an adjusting groove (8) is formed in the outer wall of the extrusion roller (3) along the axis direction, and the pressing pieces (7) are connected with the adjusting groove (8) in a sliding mode.

2. The belt web hold-down device of claim 1, wherein: sliding grooves (9) are formed in the outer wall of the winding roller (2), and the clamping plate (4) and the locking disc (5) are connected with the sliding grooves (9) in a sliding mode.

3. The belt web hold-down device of claim 1, wherein: be equipped with in adjustment tank (8) and be located adjacent regulating block (10) that compress tightly between piece (7), radial sliding connection in adjustment tank (8) is followed squeeze roll (3) in regulating block (10), rotates on regulating block (10) and is connected with two regulation connecting rods (11), and the tip that regulating block (10) were kept away from in two regulation connecting rods (11) rotates with adjacent two respectively and compresses tightly piece (7) and be connected.

4. A belt web hold down as claimed in claim 3, wherein: the inner edge of the adjusting groove (8) is connected with a synchronizing rod (12) in a sliding mode along the radial direction of the extrusion roller (3), and the synchronizing rod (12) penetrates through the adjusting block (10) and is connected with the adjusting block (10) in a sliding mode.

5. The belt web hold-down device of claim 4, wherein: an adjusting knob (13) penetrates through the end face, far away from the support frame (1), of the extrusion roller (3) along the axial direction, an adjusting gear (14) perpendicular to the axial direction of the extrusion roller (3) is fixedly arranged at one end of the adjusting knob (13), an adjusting rack (15) perpendicular to the synchronizing rod (12) is fixedly arranged at one end of the synchronizing rod (12), and the adjusting gear (14) is meshed with the adjusting rack (15).

6. The belt web hold-down device of claim 5, wherein: an inserting strip (16) is fixedly arranged on the end face of the adjusting knob (13), a plurality of inserting holes (17) are formed in the extrusion roller (3) around the circle center of the adjusting knob (13), and the inserting strip (16) is connected with the inserting holes (17) in a sliding mode.

7. The belt web hold-down device of claim 5, wherein: one end of the extrusion roller (3) far away from the adjusting knob (13) is provided with a synchronizing gear (19), the synchronizing gear (19) is fixedly connected with the adjusting gear (14) through a linkage rod (25) axially arranged along the extrusion roller (3), one end of a synchronizing rod (12) is fixedly provided with a synchronizing rack (18) parallel to the adjusting rack (15), and the synchronizing gear (19) is meshed with the synchronizing rack (18).

8. The belt web hold-down device of claim 1, wherein: and an extrusion spring (21) positioned between the adjacent pressing pieces (7) is arranged on the outer wall of the extrusion roller (3) along the axial direction of the extrusion roller (3), and two ends of the extrusion spring (21) are respectively fixedly connected with the adjacent pressing pieces (7).