CN218201275U - Inclined type reel-changing and cloth-releasing device - Google Patents

Abstract

The utility model provides a tilting reel change unreels device, include: the cloth changing and releasing mechanism is inclined; the inclined roll-changing cloth-releasing mechanism comprises: two brackets are symmetrically arranged; the sliding rail is arranged at the top of each bracket and is obliquely arranged, the top end of the sliding rail is used for bearing the standby cloth rolls, and the bottom end of the sliding rail is used for bearing the working cloth rolls; the first steering wheel and the second steering wheel are arranged at two ends of each sliding rail, and the third steering wheel and the fourth steering wheel are arranged at the bottom of each sliding rail; a drive chain disposed around the first to fourth diverting pulleys; a motor driving the transmission chain; the driving piece is used for placing a rotating shaft of the cloth roll and drives the rotating shaft to move under the driving of the transmission chain. The utility model can greatly reduce the lifting function of the machine through the slide rail which is arranged obliquely, thereby obviously reducing the cost; the area occupied by the field can be greatly reduced.

Description

Inclined type coil changing and cloth releasing device

Technical Field

The utility model relates to a tilting roll-changing and cloth-releasing device, in particular to a tilting roll-changing and cloth-releasing device for producing wet tissues.

Background

At present, in the process of manufacturing wet tissues, non-woven fabrics are required to be used as carriers of stock solutions, and production manufacturers generally make finished fabrics into rolls in order to facilitate production and transportation. Therefore, in the actual production process, the rolled material is manufactured into a product which needs to be connected and changed between cloth rolls in the using process so as to ensure the continuous work of the wet tissue production line.

In the conventional package changing device, the working roll and the standby roll are vertically overlapped, and a connecting device for splicing the cloth tapes is arranged on one side of the two rolls (for example, CN 210236549U). Although the arrangement can reduce the floor area to a certain extent, the height of the two vertically arranged cloth rolls can reach more than two meters, so that high-power mechanical equipment is needed for lifting, the cost is high, and the lifting machine is often too large and is easy to damage in the lifting process of the cloth rolls. Furthermore, because the height of the two yardage rolls can often reach more than two meters, the worker is required to fix and set the cloth head of the standby yardage roll at the position of more than two meters, the operation is very inconvenient, the danger is easy to generate, and the working efficiency of the worker is reduced. .

SUMMERY OF THE UTILITY MODEL

The utility model provides a tilting roll-changing cloth-releasing device, which can effectively solve the problems.

The utility model discloses a realize like this:

an inclined type cloth changing and releasing device, comprising: the cloth unwinding mechanism is obliquely reeled;

wherein, the cloth mechanism is put in roll change to slope includes:

two brackets are symmetrically arranged;

the sliding rail is arranged at the top of each bracket and is obliquely arranged, the top end of the sliding rail is used for bearing the standby cloth roll, and the bottom end of the sliding rail is used for bearing the working cloth roll;

the first steering wheel and the second steering wheel are arranged at two ends of each sliding rail, and the third steering wheel and the fourth steering wheel are arranged at the bottom of each sliding rail;

a drive chain disposed around the first diverting pulley to the fourth diverting pulley;

a motor driving the transmission chain;

the driving piece is used for placing a rotating shaft of the cloth roll and drives the rotating shaft to move under the driving of the transmission chain.

The beneficial effects of the utility model are that:

1. the inclined type cloth changing and releasing device provided by the utility model has the advantages that through the slide rail which is arranged obliquely, on one hand, when the working yardage roll is used up, the standby yardage roll can slide to the bottom end of the slide rail under the traction of the transmission chain under the action of gravity to serve as the working yardage roll, so that the mechanical lifting effect can be greatly reduced, the cost is obviously reduced, and the motor can be prevented from being damaged; on the other hand, through the slide rail that the slope set up, the area that reduction place that can also be great took.

2. The utility model provides a tilting reel change cloth unwinding device through the slide rail that the slope set up, can also show the height that reduces reel change mechanism of plugging into, makes reel change mechanism of plugging into highly be less than among the prior art height (about 1.5-1.7 meters) to make the workman need not at the eminence operation, reduce workman's risk, raise the efficiency.

3. The utility model discloses a slide rail that the slope set up is that the pressure of work yardage roll and reserve yardage roll all bears on the support to can improve greatly the life-span of motor.

4. The utility model discloses a drive chain and driving piece, and do not rely on gravity completely, consequently can solve because two supports are right the frictional force at the pivot both ends of yardage roll is different, leads to the pivot atress of yardage roll is different and produce "off-set" and the card is pause the phenomenon of support produces.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic mechanism diagram of an inclined type cloth changing and unwinding device provided by the embodiment of the present invention.

Fig. 2 is a schematic mechanism diagram of an inclined cloth changing and releasing mechanism in an inclined cloth changing and releasing device according to an embodiment of the present invention.

Fig. 3 is a schematic view of an inclined type cloth changing and unwinding device provided by the embodiment of the present invention in operation.

Fig. 4 is a schematic structural view of a transmission chain in an inclined cloth changing and releasing mechanism in an inclined cloth changing and releasing device provided by the embodiment of the present invention.

Fig. 5 is a flowchart of a control method of an inclined type cloth changing and releasing device according to an embodiment of the present invention.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1-4, an inclined type cloth changing and unreeling device comprises: the inclined roll-changing cloth-releasing mechanism 10 and the roll-changing connecting mechanism 20.

Wherein, the inclined cloth-changing and unreeling mechanism 10 comprises:

two brackets 11 arranged symmetrically;

the sliding rails 111 are arranged at the tops of the brackets 11, and the sliding rails 111 are obliquely arranged;

a first steering wheel 112 and a second steering wheel 113 arranged at two ends of each sliding rail 111, and a third steering wheel 114 and a fourth steering wheel 115 arranged at the bottom of each sliding rail 111;

a drive chain 13 provided around the first diverting pulley 112 to the fourth diverting pulley 115;

a motor 12 for driving the transmission chain 13;

and the driving part 134 is arranged on the transmission chain 13, and the driving part 134 is used for placing a rotating shaft of the cloth roll 50/51 and driving the rotating shaft to move under the driving of the transmission chain 13.

The support 11 is mainly used for supporting the overall weight of the cloth roll 50/51, and can be of a steel frame structure. As a further improvement, in one embodiment, in order to reduce the overall weight of the bracket 11, the middle of the bracket 11 further includes a hollow-out portion 119, so that the bracket 11 is integrally formed into a structure similar to a "clip".

Two ends of the slide rail 111 are respectively used for bearing the working cloth roll 50 and the standby cloth roll 51. In particular, the top end of the slide rail 111 is used for carrying the standby cloth roll 51, and the bottom end is used for carrying the working cloth roll 50. The advantage of this is that, because the slide rail 111 is arranged obliquely, when the working cloth roll 50 is used up, the standby cloth roll 51 can slide to the bottom end of the slide rail 111 under the traction of the transmission chain 13 under the action of gravity to serve as the working cloth roll, so that the lifting effect of the machine can be greatly reduced, and the cost is further reduced significantly. Preferably, the slide rail 111 forms an included angle of greater than or equal to 5 ° and less than or equal to 30 ° with the horizontal direction. This is because when the angle is too small, on the one hand, the gravity of the standby cloth roll 51 sliding downwards is small, and therefore the motor 12 is required to output large power; on the other hand, the inclined cloth-changing and unreeling mechanism 10 occupies a large area and area. When the included angle is too large, on one hand, the inertia of the downward sliding of the standby cloth roll 51 is large, so that the motor 12 or other locking mechanisms are easy to damage when braking; on the other hand, when the chain is stationary during use, the motor 12 or other locking mechanism is subjected to a large load due to the large weight and is also prone to damage. More preferably, the sliding rail 111 forms an included angle of 15 ° or more and 25 ° or less with the horizontal direction. In one embodiment, the sliding rail 111 forms an angle of about 20 ° with the horizontal direction.

The first diverting pulley 112, the second diverting pulley 113, the third diverting pulley 114 and the fourth diverting pulley 115 form a quadrilateral mechanism, so that the transmission chain 13 arranged around the first diverting pulley 112 to the fourth diverting pulley 115 also forms a quadrilateral mechanism.

The type of the motor 12 is not limited as long as the motor can drive the transmission chain 13. As a further improvement, the inclined roll-changing and cloth-releasing mechanism 10 further includes a locking mechanism, and the locking mechanism is used for locking the standby cloth roll 51 when the standby cloth roll 51 slides down to the bottommost working position, so as to realize the switching of the standby cloth roll 51 to the working cloth roll 50. Further, the locking mechanism and the motor 12 can be linked, that is, when the standby cloth roll 51 slides down to the lowest working position and is locked by the locking mechanism, a control signal is sent to control the motor 12 to brake. The locking mechanism can comprise a microswitch, a first motor and a buckle arranged on a rotating shaft of the first motor. When the standby cloth roll 51 slides downwards to the lowest working position, the microswitch is triggered, the microswitch sends out a control signal to control the first motor to rotate, so that the buckle arranged on the rotating shaft of the first motor floats upwards to abut against the rotating shaft of the standby cloth roll 51, and simultaneously sends out a control signal to control the motor 12 to brake.

A abdicating groove 116 for the rotating shaft of the working cloth roll 50 to pass through is further formed between the connecting line of the second steering wheel 113 and the third steering wheel 114 and the bracket 11. The receding groove 116 is disposed at an inclined angle so that the rotating shaft of the work roll 50 can smoothly slide to the receiving portion 117 of the bottom without additional collision. Preferably, the receding groove 116 forms an included angle of 10 to 40 ° with the vertical direction. More preferably, the receding groove 116 forms an included angle of 20 to 30 ° with the vertical direction. In one embodiment, the offset groove 116 is formed at an angle of 25 ° to the vertical direction.

The receiving portion 117 includes a first connecting portion 1171 and a second connecting portion 1172, the first connecting portion 1171 is matched with the transmission chain 13 and is connected with the abdicating groove 116, so as to play a role of receiving the rotating shaft of the working cloth roll 50, the second connecting portion 1172 is lower than the first connecting portion 1171, so that the rotating shaft of the working cloth roll 50 can completely slide out smoothly under the action of gravity and cannot be clamped at the bottom of the bracket 11.

Referring to fig. 2, it is defined that the top of the slide rail 111 of the transmission chain 13 is point a, the bottom of the slide rail 111 of the transmission chain 13 is point B, and the connection position of the first connection portion 1171 and the second connection portion 1172 of the transmission chain 13 is point C, wherein the position of the rotation shaft of the cloth roll 50/51 from point a to point B to point C is driven by the motor 12 to move, rather than relying on its own gravity completely. This is because, if relying on the gravity of the two brackets 11, the friction force of the two brackets 11 to the two ends of the rotating shaft of the cloth roll 50/51 is different, which causes the rotating shaft of the cloth roll 50/51 to be stressed differently to generate "bias" and be blocked in the brackets 11, thereby seriously affecting the production. Therefore, further, the transmission chain 13 is divided into three sections equally according to the positions of the points a, B and C, and the driving members 134 are respectively disposed on the transmission chain 13 at the points a, B and C. This is because when the driving chain 13 is driven from point a to point B, point B is just transmitted to point C, and the rotating shaft of the cloth roll 50/51 is just separated from the driving chain 13 and slides out of the second connecting portion 1172, so that continuous production is realized. That is, the point C is provided at a connection point of the second connection portion 1172 and the first connection portion 1171.

Referring to fig. 4, the transmission chain 13 includes a chain body 131, and a side plate 132 disposed on one side of the chain body 131; the side plate 132 is provided with a through hole 133 for fixing the driving member 134. The driving member 134 may be screw-engaged with the through hole 133 to achieve the fixing of the driving member 134. The driving member 134 may comprise two spaced apart driving members, the rotating shaft of the cloth roll 50/51 is disposed between the two driving members 134, and when the chain body 131 moves forward, the driving member 134 also moves forward to drive the rotating shaft of the cloth roll 50/51 to move forward. The position of the chain body 131 at the slide rail 111 is arranged parallel to the slide rail 111, and the position is arranged lower than the slide rail 111, so that the pressure of the yardage roll 50/51 is borne on the slide rail 111, and the chain body 131 is not stressed. It will be appreciated that the drive member 134 projects beyond the surface of the track 111 to drive the shaft of the roll 50/51.

As a further improvement, the inclined roll-changing and cloth-releasing mechanism 10 further includes a first photoelectric sensor 14 for detecting whether the work cloth roll 50 is released completely, and if so, further controlling the roll-changing and connecting mechanism 20 to work.

As a further improvement, the inclined change-unwinding mechanism 10 further includes a second photoelectric sensor 15, which is disposed on the support 11 between the standby cloth roll 51 and the working cloth roll 50. The second photoelectric sensor 15 is configured to obtain a diameter of the standby cloth roll 51, when the unwinding of the working cloth roll 50 is finished and the roll-changing and docking mechanism 20 is docked successfully, the standby cloth roll 51 starts to operate for a predetermined time at a standby position, and when the second photoelectric sensor 15 detects that the diameter of the standby cloth roll 51 is lower than the predetermined diameter R, that is, when the diameter of the standby cloth roll 51 is operated for the predetermined time at the standby position, the standby cloth roll 51 starts to be controlled to switch from a standby position at the top to an operating position at the bottom. This has the advantage that the height of the change docking mechanism 20 can be reduced, which in turn reduces the volume of the entire inclined change unreeling device. The first photosensor 14 and the second photosensor 15 are both related art, and will not be described in detail herein.

The roll-changing docking mechanism 20 includes:

a support plate 21; and

a first guide shaft 22, a cutting knife 23, a pressing part, a second guide shaft 25 and a third guide shaft 26 which are arranged on the supporting plate 21. The pressing piece comprises a first pressing head 24 and a second pressing head 27 which are arranged oppositely; the first guide shaft 22 and the second guide shaft 25 are respectively arranged at the top of the bottom of the first pressing head 24, and the cutting knife 23 is arranged between the first guide shaft 22 and the first pressing head 24; the third guide shaft 26 is disposed at the bottom of the second press-fitting head 27. The working cloth roll 50 sequentially passes through the first guide shaft 22, the cutting knife 23, the pressing piece and the second guide shaft 25 to provide a working cloth 501 for the tension adjusting mechanism 30. The spare cloth head 511 of the spare cloth roll 51 is fixedly arranged on the second pressing head 27 through the third guide shaft 26. Specifically, the spare cloth head 511 of the spare cloth roll 51 may be attached with a double-sided adhesive tape in advance, and the spare cloth head 511 of the spare cloth roll 51 is fixedly disposed on the surface of the working cloth roll 50 on the second pressing head 27 through the double-sided adhesive tape. When the first photoelectric sensor 14 detects that the working cloth roll 50 is completely unreeled, the pressing pieces are controlled to be mutually pressed, so that the working cloth 501 and the spare cloth head 511 are pressed together, and the cutting knife 23 is further controlled to cut the rest of the working cloth 501.

As a further improvement, the inclined type roll-changing and cloth-releasing device further comprises a tension adjusting mechanism 30 for adjusting the overall tension of the working cloth 501. The tension adjusting mechanism 30 includes a plurality of first reversing rotating shafts 32 horizontally disposed, a second reversing rotating shaft 33 disposed at the bottom of the first reversing rotating shaft 32, a third reversing rotating shaft 34 disposed at the upper portion of the first reversing rotating shaft 32, and a fourth reversing rotating shaft 35. The tension of the work cloth 501 is adjusted by reversing through the first reversing rotating shaft 32, the second reversing rotating shaft 33, the third reversing rotating shaft 34 and the fourth reversing rotating shaft 35, so that the tension is stably output. Specifically, in one embodiment, the working cloth 501 sequentially passes through the first reversing rotating shaft 32, the second reversing rotating shaft 33, the first reversing rotating shaft 32, the third reversing rotating shaft 34, the fourth reversing rotating shaft 35 and the third reversing rotating shaft 34 to reverse and adjust tension, so that stable output of the tension is realized

As a further improvement, the inclined type roll-changing and cloth-releasing device further comprises a cutting mechanism 40 for cutting the work cloth 501. The cutting mechanism 40 is a conventional art, and will not be described in detail herein.

Referring to fig. 5, an embodiment of the present invention further provides a control method for an inclined type cloth changing and releasing device, including the following steps:

s1, controlling the working cloth roll 50 to continuously unreel;

s2, after the working cloth roll 50 is unwound, controlling the roll changing and connecting mechanism 20 to press the working cloth 501 and the standby cloth head 511 together, and further controlling the cutting knife 23 to cut the rest of the working cloth 501;

and S3, controlling the motor 12 to work to enable the standby cloth roll 51 to slide to a working position, and at the moment, enabling the rotating shaft of the working cloth roll 50 to slide to the receiving part 117 through the abdicating groove 116 for recycling. The control method of the invention has the characteristics of energy consumption reduction, energy saving, environmental protection, easy industrial production and the like.

In step S1, whether unwinding of the work cloth 501 of the work cloth roll 50 is finished may be continuously detected by the first photoelectric sensor 14, so as to determine whether unwinding of the work cloth roll 50 is finished. Referring to fig. 3, the first photoelectric sensor 14 in fig. 3 continuously sends a signal to detect whether the discharging of the work cloth 501 is finished, and when the first photoelectric sensor 14 does not detect the signal, it indicates that the discharging of the work cloth 501 is finished.

In step S2, since the double-sided adhesive tape is attached to the spare cloth head 511 in advance, when the first photoelectric sensor 14 detects that the working cloth roll 50 is completely unwound, the pressing members are controlled to be pressed against each other, so that the working cloth 501 and the spare cloth head 511 are pressed and bonded together, and the cutting knife 23 is further controlled to cut the remaining cloth of the working cloth 501.

In step S3, the controlling the motor 12 to operate to slide the backup cloth roll 51 to the operating position specifically includes:

s31, acquiring the diameter of the standby cloth roll 51 through the second photoelectric sensor 15, and controlling the motor 12 to work to enable the standby cloth roll 51 to slide to a working position when the diameter of the standby cloth roll 51 is smaller than a set value R; otherwise, the cloth roll 51 is controlled to work at the standby position for a predetermined time, until the diameter of the cloth roll 51 is smaller than the set value R, and then the motor 12 is controlled to work to slide the cloth roll 51 working at the standby position to the working position.

It is understood that, in step S31, the diameter of the general fabric roll is defined as R, so the set value R may be 0.5R to 0.8R. In one embodiment, the set value R may be 0.7R. Since the diameter of the roll is generally about 100cm, the set value R may be about 50 to 80 cm. In one embodiment, the set value R may be 70cm. That is, in step S31, when the diameter of the input cloth roll 51 is 70cm, the motor 12 is directly controlled to operate to slide the cloth roll 51 to the operating position; when the diameter of the input cloth roll 51 is 100cm, the cloth roll 51 is controlled to work at the standby position for a preset time till the diameter of the cloth roll 51 is less than 70cm, and then the motor 12 is controlled to work to enable the cloth roll 51 working at the standby position to slide to the working position.

After step S3, the method may further include:

when the motor 12 is controlled to work to slide the standby cloth roll 51 to the working position, the other standby cloth roll 51 is placed at the standby position, and then the standby cloth head 511 is attached to the double-sided adhesive tape in advance and is fixedly arranged on the second laminating head 27.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An inclined cloth changing and releasing device, which is characterized by comprising: the inclined roll-changing cloth-releasing mechanism (10);

wherein the inclined cloth-changing and unreeling mechanism (10) comprises:

two brackets (11) which are symmetrically arranged;

the sliding rails (111) are arranged at the top of each support (11), the sliding rails (111) are obliquely arranged, the top ends of the sliding rails (111) are used for bearing standby cloth rolls (51), and the bottom ends of the sliding rails (111) are used for bearing working cloth rolls (50);

a first steering wheel (112) and a second steering wheel (113) which are arranged at two ends of each sliding rail (111), and a third steering wheel (114) and a fourth steering wheel (115) which are arranged at the bottom of each sliding rail (111);

a drive chain (13) provided around the first steering wheel (112) to the fourth steering wheel (115);

a motor (12) driving the transmission chain (13);

the driving piece (134) is arranged on the transmission chain (13), and the driving piece (134) is used for placing a rotating shaft of a cloth roll (50/51) and driving the rotating shaft to move under the driving of the transmission chain (13).

2. The inclined type cloth-changing and unreeling device as claimed in claim 1, wherein the slide rail (111) forms an included angle of not less than 5 ° and not more than 30 ° with the horizontal direction.

3. The inclined type cloth-changing and unreeling device according to claim 1, wherein a abdicating groove (116) for the rotating shaft of the working cloth roll (50) to pass is further formed between the connecting line of the second steering wheel (113) and the third steering wheel (114) and the bracket (11); the abdicating groove (116) is arranged in an inclined way at a preset angle, so that the rotating shaft of the working cloth roll (50) can smoothly slide to the receiving part (117) at the bottom.

4. Inclined type roll-changing and cloth-releasing device according to claim 3, wherein said receiving portion (117) comprises a first connecting portion (1171) and a second connecting portion (1172), said first connecting portion (1171) is engaged with said transmission chain (13) and connected with said avoiding groove (116) to receive the rotation shaft of the working cloth roll (50), said second connecting portion (1172) is arranged lower than said first connecting portion (1171), so that the rotation shaft of the working cloth roll (50) can be smoothly slid out completely by gravity.

5. The inclined type cloth changing and unreeling device as claimed in claim 4, wherein the transmission chain (13) is defined as point A at the top of the slide rail (111), the transmission chain (13) is defined as point B at the bottom of the slide rail (111), the transmission chain (13) is defined as point C at the connection position of the first connecting part (1171) and the second connecting part (1172), and the transmission chain (13) is divided into three sections on average by the positions of point A, point B and point C.

6. The inclined type cloth changing and unreeling device as claimed in claim 1, wherein the transmission chain (13) comprises a chain body (131), a side plate (132) disposed at one side of the chain body (131); the side plate (132) is provided with a through hole (133) for fixing the driving piece (134).

7. The inclined type cloth-changing and unreeling device as claimed in claim 1, wherein the inclined cloth-changing and unreeling mechanism (10) further comprises a first photoelectric sensor (14) for detecting whether the work cloth roll (50) is unreeled completely.

8. The inclined change-unwinding device according to claim 1, characterized in that said inclined change-unwinding mechanism (10) further comprises a second photoelectric sensor (15) arranged on said support (11) between said reserve reel (51) and said working reel (50); the second photoelectric sensor (15) is used for acquiring the diameter of the standby cloth roll (51).

9. The inclined type cloth-changing and unreeling device as claimed in claim 1, wherein the slide rail (111) forms an included angle of 15 degrees or more and 25 degrees or less with the horizontal direction.

10. The inclined type reel-changing cloth unwinding device as claimed in claim 1, further comprising a reel-changing docking mechanism (20), wherein said reel-changing docking mechanism (20) comprises:

a support plate (21); and

a first guide shaft (22), a cutting knife (23), a pressing piece, a second guide shaft (25) and a third guide shaft (26) which are arranged on the support plate (21); the pressing piece comprises a first pressing head (24) and a second pressing head (27) which are arranged oppositely; the first guide shaft (22) and the second guide shaft (25) are respectively arranged at the top of the bottom of the first pressing head (24), and the cutting knife (23) is arranged between the first guide shaft (22) and the first pressing head (24); the third guide shaft (26) is arranged at the bottom of the second pressing head (27).

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