CN114147798A - Mounting structure of film surface winding and reel changing cutter - Google Patents
Mounting structure of film surface winding and reel changing cutter Download PDFInfo
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- CN114147798A CN114147798A CN202111511331.8A CN202111511331A CN114147798A CN 114147798 A CN114147798 A CN 114147798A CN 202111511331 A CN202111511331 A CN 202111511331A CN 114147798 A CN114147798 A CN 114147798A
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- Prior art keywords
- friction roller
- cutter
- connecting rod
- air
- roller
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- 238000004804 winding Methods 0.000 title claims description 58
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000003570 air Substances 0.000 description 105
- 230000009471 action Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
- B26D1/265—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut for thin material, e.g. for sheets, strips or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/26—Cutting-off the web running to the wound web roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
- B65H19/305—Inserting core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/417—Handling or changing web rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/175—Plastic
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding Of Webs (AREA)
Abstract
A film surface rolling and reel changing cutter mounting structure comprises a rack, wherein a friction roller, a rolling shaft and a cutter are mounted on the rack; a cutter guide rail extending along the radial direction of the friction roller is arranged in a roller cavity of the friction roller, a strip-shaped gap is further formed in the surface of the friction roller, and air suction holes are formed in the surface parts of the friction roller on the two sides of the strip-shaped gap; a cutter driving mechanism for driving the cutter to move along a cutter guide rail of the friction roller is also arranged in the roller cavity of the friction roller; the cutter driving mechanism comprises an air cylinder, a first connecting rod, a second connecting rod and a connecting rod support, wherein the first end of the first connecting rod is hinged to the cutter through a first hinge shaft, the second end of the first connecting rod is hinged to the first end of the second connecting rod through a second hinge shaft, the second end of the second connecting rod is hinged to the connecting rod support through a third hinge shaft, and a piston rod of the air cylinder is hinged to the first connecting rod and the second connecting rod through second hinge shafts respectively. The invention can make the tangential direction of the film be the transverse direction of the film.
Description
Technical Field
The invention belongs to the technical field of film winding and roll changing, and particularly relates to a mounting structure of a film surface winding and roll changing cutter.
Background
After the film is produced, the film is usually wound by a paper core cylinder sleeved on a winding shaft to form a film roll. The first is center rolling, as the name suggests, the power of the film roll rotation comes from a rolling shaft positioned in the center of the film roll, and the rolling shaft is directly driven by a rolling motor; the second type is surface rolling, as the name suggests, the power for the film roll rotation comes from a surface friction roller (friction roller for short) which is in contact with the film roll surface, the friction roller is pressed on the film roll surface and performs friction rubbing on the film roll, and the friction roller is directly driven by a friction roller motor. The friction roller of the surface winding device is generally provided with a pressing roller which is pressed against the friction roller, and the pressing roller can enable the surface friction force generated by the friction roller to be more effectively transmitted to the upstream film.
The frame is also provided with a winding shaft used for winding the film, the winding shaft comprises a main winding shaft and a standby winding shaft, the positions of the main winding shaft and the standby winding shaft can move relative to the friction roller, wherein the main winding shaft is used for winding the film to form a film roll during normal winding, the standby winding shaft is used for replacing the main winding shaft during roll changing, the standby winding shaft becomes a new main winding shaft after roll changing, the original main winding shaft and the film roll are removed, then the film roll is separated from the original main winding shaft, and the original main winding shaft is transferred to the standby position to form a new standby winding shaft.
When the film wound by the main winding shaft at the winding position reaches a set length, the standby winding shaft must replace the main winding shaft, and the process is called roll change. The roll change process needs to be applied to the cutter; when the roll changing is started, the film is cut off by the cutter and is divided into a film front section and a film rear section after being cut off, wherein the film front section is continuously wound by the existing film roll, and the front edge of the film rear section is stuck to the surface of a new paper core cylinder on a new main winding shaft by double-faced adhesive paper, so that the roll changing process is completed. In the prior art, the cutter is mounted outside the friction roller in a suspension manner, the blade orientation of the cutter is transverse (namely parallel to the direction of the winding shaft), and the moving direction of the cutter is also transverse in the cutting process of the cutter.
The roll changing process can not be stopped normally, but the film is still continuously conveyed from upstream and continuously moves towards downstream during roll changing, and the moving direction is perpendicular to the direction of the cutter moving along the transverse direction, so that the film still does not stop moving at high speed during the moving and cutting process of the cutter along the width direction of the film, the tangent line formed on the film by the cutter is an oblique line, the film part beside the tangent line is a right-angled triangle, the length can exceed ten meters (related to the moving speed of the cutter, the width of the film and the moving speed of the film), for the film which is expensive and needs to be changed frequently, the waste is not small, and the edge part of the cut of the right-angled triangle needs to be trimmed before use.
Disclosure of Invention
The invention aims to overcome the defects and provide a mounting structure of a film surface winding and rewinding cutter, which can enable the tangential direction formed by a film to be transverse to the film.
The purpose can be realized according to the following scheme:
a film surface rolling and reel changing cutter mounting structure comprises a rack, wherein a friction roller is mounted on the rack, the friction roller is hollow and forms a roller cavity, the friction roller is directly driven to rotate by a friction roller motor, the friction roller is provided with a rotating shaft, the axial direction of the friction roller is transverse, the rotating shaft of the friction roller comprises a left shaft head and a right shaft head, the left shaft head is connected with the central part of the left end surface of the friction roller, the right shaft head is connected with the central part of the right end surface of the friction roller, a compression roller is mounted beside the friction roller, the compression roller presses the friction roller, and a rolling shaft for rolling a film is further mounted on the rack; a cutter for cutting off the film is also arranged;
the method is characterized in that: a cutter guide rail extending along the radial direction of the friction roller is arranged in the roller cavity of the friction roller, and two ends of the cutter are movably arranged on the cutter guide rail and move along the cutter guide rail; the cutting edge of the cutter faces to the radial direction of the friction roller and the centrifugal direction of the friction roller, and the cutting edge of the cutter is in a sawtooth shape; the surface of the friction roller is also provided with a strip-shaped gap for exposing the cutting edge of the cutter, and the extending direction of the strip-shaped gap is parallel to the direction of the central axis of the friction roller; the surface parts of the friction rollers on the two sides of the strip-shaped gap are provided with air suction holes; the left section of shaft head and the right section of shaft head of the friction roller are hollow and respectively formed into straight strip-shaped air ducts, and the two sections of air ducts are respectively called a first section of air duct and a second section of air duct;
a cutter driving mechanism for driving the cutter to move along a cutter guide rail of the friction roller is also arranged in the roller cavity of the friction roller; the cutter driving mechanism comprises an air cylinder, a first connecting rod, a second connecting rod and a connecting rod support, the connecting rod support is fixedly installed inside the friction roller, the first end of the first connecting rod is hinged with the cutter through a first hinge shaft, the second end of the first connecting rod is hinged with the first end of the second connecting rod through a second hinge shaft, the second end of the second connecting rod is hinged with the connecting rod support through a third hinge shaft, and a piston rod of the air cylinder is hinged with the first connecting rod and the second connecting rod through second hinge shafts respectively; when the included angle between the first connecting rod and the second connecting rod is 180 degrees, the longitudinal direction of the first connecting rod and the second connecting rod is the radial direction of the friction roller, the cutting edge of the cutter is exposed out of the long strip-shaped gap of the friction roller, and the piston rod of the cylinder is positioned in the middle of the telescopic moving track of the cylinder; when a piston rod of the air cylinder is positioned at the end position of the telescopic moving track of the air cylinder, the included angle between the first connecting rod and the second connecting rod is less than 180 degrees, and the cutting edge of the cutter is hidden in the roller cavity of the friction roller;
the friction roller is characterized in that an air exhaust component and an air source component for providing an air source for the air cylinder are further arranged outside the friction roller, the air source component is connected to the air cylinder inside the friction roller through a first section of air guide pipe, and the air exhaust component is communicated to a roller cavity of the friction roller through a second section of air guide pipe.
The end surface of the second section of air duct is closed to form a blind pipe, and the side surface of the second section of air duct is provided with an air guide hole; a fixed shaft sleeve is arranged outside the second section of the air duct, and an air guide port is formed in the side surface of the shaft sleeve; the air guide port is communicated with the air exhaust part; when the air guide hole of the second section of air guide pipe rotates to the air guide hole aligned with the shaft sleeve, the air exhaust part is communicated to the roller cavity of the friction roller through the second section of air guide pipe.
The end part of the first section of air duct is provided with a rotary joint, and the air source part is connected to the cylinder in the friction roller through the rotary joint and the first section of air duct.
The invention has the following advantages and effects:
the film is absorbed on the surface of the friction roller by using vacuum negative pressure in the process of cutting off the film, the absorbed film part rotates along with the friction roller, the film is static relative to the friction roller, and the cutter rotates along with the friction roller, namely the cutter is static relative to the friction roller in the circumferential direction of the friction roller; when the cutting edge of the cutter extends out of the strip-shaped gap along the radial direction of the friction roller, the cutter cuts off the film, the tangent line of the film formed by the cutter is parallel to the central axis of the winding shaft, namely, the tangent line direction of the circumferential surface of the friction roller is equivalent to the plain line direction of the circumferential surface of the friction roller, the film cannot generate an oblique opening, and therefore the waste is avoided, and the film is particularly suitable for valuable films or films needing frequent roll changing (the frequent roll changing means that the length of each roll of film material is short, and the waste of about ten meters is not small in proportion).
And secondly, each cutting action of the cutter comprises the opposite extending and retracting actions, namely reciprocating motion. In the process of cutting the film, each one-way action (one-way extension or one-way retraction of the piston rod) of the cylinder piston rod can drive the cutter to realize two-way action (reciprocating motion of retraction after the cutter extends), namely when the cutter needs to retract after extending, the cylinder piston rod does not need to be reversed, and the cylinder body does not need to exchange air, so that the cutter blade can retract quickly after exposing the elongated gap, and the two actions of exposing and retracting the cutter blade really realize one-step completion (explained as follows: when the traditional cylinder drives other components to reciprocate, the cylinder piston rod needs to convert the motion direction, the cylinder body needs to exchange air, and the reversing of the cylinder piston rod and the air exchange of the cylinder body need to consume a longer time, which is not completed in one step, so that the film is difficult to be completed instantly).
And thirdly, the air cylinder drives the cutter blade to retract quickly after the cutter blade is exposed out of the elongated gap, so that the cutter blade is prevented from being scraped to other surrounding parts (explained in the following: when the roll is changed, the surface of the friction roller simultaneously contacts the press roller, the old film roll and the new winding shaft, the staggered distance between the press roller and the new winding shaft is not large, the film can only be cut in a section between the press roller and the new winding shaft, on the other hand, the cutter blade can synchronously rotate along with the friction roller, and if the cutter blade cannot retract quickly after the cutter blade is exposed out of the elongated gap, the cutter blade is likely to be scraped to the new winding shaft).
When the reel is to be changed and cutting is to be carried out, the air exhaust part can be started firstly, so that when the air guide hole of the second section of air guide pipe rotates to be aligned with the air guide opening of the shaft sleeve, the air exhaust part is communicated with the roller cavity of the friction roller, and the roller cavity of the friction roller can form negative pressure; therefore, the film can be cut by utilizing the time window, the film is firmly attached to the surface of the friction roller and cannot slide along the circumferential direction due to the existence of the negative pressure, and the tension required by the cutting process is ensured; after the film is cut, the air guide hole of the second section of air guide tube rotates to a position staggered with the air guide hole of the shaft sleeve, the negative pressure of the air exhaust part cannot be transmitted into the roller cavity of the friction roller, the friction roller does not adsorb the film any more, the film is released, so that the front section of the film is continuously coiled by the existing film coil, and the front edge of the rear section of the film can be adhered to the surface of a new paper core cylinder on a new coiling shaft by double-faced adhesive paper.
Drawings
Fig. 1 is a schematic view of the overall state of the embodiment of the invention during roll change (the cutter is extended, and the piston rod of the air cylinder is in the middle of the telescopic moving track).
Fig. 2 is a schematic cross-sectional view of the rubbing roll in fig. 1 in a direction perpendicular to the axial direction.
Fig. 3 is a schematic sectional view of the rubbing roller in fig. 1 in the axial direction.
Fig. 4 is a partially enlarged schematic view of fig. 3.
FIG. 5 is a schematic cross-sectional view of the connection between the right spindle head and the ambient air extractor.
Fig. 6 is a schematic sectional view taken along line a-a in fig. 5.
Fig. 7 is an overall structural view of the embodiment of the invention in normal rolling (cutter retraction, cylinder piston rod fully extended).
Fig. 8 is a schematic sectional view of the rubbing roller in fig. 7 in the axial direction.
Fig. 9 is a partially enlarged schematic view of fig. 8.
Fig. 10 is a schematic sectional view of the rubbing roller in fig. 7 in a direction perpendicular to the axial direction.
FIG. 11 is a schematic view of the configuration of FIG. 6 after the air-guide holes of the second airway tube have been rotated out of alignment with the air-guide holes of the hub.
Fig. 12 is a schematic view showing the components shown in fig. 9 in a changed state during normal winding (retraction of the cutter, full retraction of the cylinder piston rod).
Detailed Description
The installation structure of the film surface winding and rewinding cutter shown in fig. 1, 7, 3 and 8 comprises a frame 1, a friction roller 2 is installed on the frame, the friction roller 2 is hollow and forms a roller cavity 20, the friction roller 2 is directly driven by a friction roller motor to rotate, the friction roller 2 is provided with a rotating shaft, the axial direction of the friction roller 2 is transverse, the rotating shaft of the friction roller comprises a left shaft head and a right shaft head (a left shaft head 61 and a right shaft head 62), the left shaft head 61 is connected with the central part of the left end surface of the friction roller, the right shaft head 62 is connected with the central part of the right end surface of the friction roller, a compression roller 3 is installed beside the friction roller 2, a winding shaft for winding a film 80 is also installed on the frame, the winding shaft comprises a main winding shaft 4 and a standby winding shaft 40, the positions of the main winding shaft 4 and the standby winding shaft 40 can move relative to the friction roller 2, the main winding shaft 4 is used for winding the film to become a film roll when the film is normally wound, the standby winding shaft 40 is used for replacing the main winding shaft 4 during roll changing, and the pressing roller 3 is pressed on the friction roller 2; a cutter 5 for cutting off the film 80 is also arranged;
as shown in fig. 2, 3 and 4, two cutter guide rails 51 extending in the radial direction (the radial direction refers to the radial direction of the friction roller) are installed inside the roller cavity 20 of the friction roller, the two cutter guide rails 51 are arranged at the left end and the right end of the roller cavity of the friction roller, and the two ends of the cutter 5 are movably installed on the cutter guide rails 51 and move along the cutter guide rails; the cutting edge of the cutting knife is in a sawtooth shape, and the cutting edge of the cutting knife 5 faces to the radial direction of the friction roller 2 and the centrifugal direction of the friction roller; the surface of the friction roller 2 is also provided with a strip-shaped gap 21 for exposing the cutting edge of the cutting knife, and the extending direction of the strip-shaped gap 21 is parallel to the direction of the central axis of the friction roller 2; the surface parts of the friction rollers at the two sides of the strip-shaped gap 21 are provided with air suction holes 22;
the left spindle nose 61 and the right spindle nose 62 of the friction roller 2 are hollow and respectively formed into straight strip-shaped air ducts, the two sections of air ducts are respectively called a first section of air duct and a second section of air duct, the first section of air duct is the left spindle nose 61, and the second section of air duct is the right spindle nose 62, as shown in fig. 3;
a cutter driving mechanism for driving the cutter to move along a cutter guide rail of the friction roller is also arranged in the friction roller cavity 20; the cutter driving mechanisms are divided into a left group and a right group, each group of cutter driving mechanisms comprises an air cylinder 52, a first connecting rod 53, a second connecting rod 54 and a connecting rod support 55, the connecting rod support 55 is fixedly installed inside the friction roller 2, the first end of the first connecting rod 53 is hinged with the cutter 5 through a first hinge shaft 71, the second end of the first connecting rod 53 is hinged with the first end of the second connecting rod through a second hinge shaft 72, the second end of the second connecting rod 54 is hinged with the connecting rod support 55 through a third hinge shaft 73, and a piston rod 520 of the air cylinder is hinged with the first connecting rod 53 and the second connecting rod 54 through the second hinge shaft 72; when the included angle between the first connecting rod 53 and the second connecting rod 54 is 180 °, the longitudinal direction of the first connecting rod 53 and the second connecting rod 54 is the radial direction of the rubbing roller 2, the cutting edge of the cutting knife 5 is exposed out of the elongated slit 21 of the rubbing roller, and the piston rod 520 of the cylinder 52 is in the middle of the telescopic moving track (i.e. in the middle position between the fully extended position and the fully retracted position), as shown in fig. 2, 3, 4, 8 and 9; when the piston rod 520 of the air cylinder is at the end position (i.e. the fully extended position or the fully retracted position) of the telescopic moving track, the included angle between the first link 53 and the second link 54 is an obtuse angle, and the blade of the cutting knife 5 is hidden in the roller cavity 20 of the friction roller, for example, fig. 8, 9 and 10 show the state that the piston rod 520 of the air cylinder is at the fully extended position, and fig. 12 shows the state that the piston rod 520 of the air cylinder is at the fully retracted position;
as shown in fig. 8, an air supply member 24 is provided outside the rubbing roll 2, and the air supply member 24 is used for supplying air to the air cylinder 52; the end of the first section of the gas-guide tube 61 is provided with a rotary joint 23 (also called a gas slip ring), and the gas source component 24 is connected to the cylinder 52 inside the friction roller 2 through the rotary joint 23 and the first section of the gas-guide tube 61, as shown in fig. 2.
An air exhaust part is arranged outside the friction roller 2, the end surface 620 of the second section of air duct 62 is closed to form a blind pipe, and the side surface of the second section of air duct 62 is provided with an air guide hole 91; a fixed shaft sleeve 9 is arranged outside the second section of the air duct 62, and an air guide port 90 is formed in the side surface of the shaft sleeve 9; the air guide port 90 is communicated with the air exhaust part through an air exhaust pipe 92; when the air guide hole 91 of the second section of air guide pipe is rotated to be aligned with the air guide hole 90 of the shaft sleeve, the air exhaust part is communicated with the roller cavity 20 of the friction roller through the air exhaust pipe 92 and the second section of air guide pipe 62, as shown in fig. 3, 5 and 6.
The use of the above embodiment is as follows:
during normal winding, the standby winding shaft 40 leaves the friction roller 2, and the piston rod 520 of the air cylinder 52 is in a fully extended position (as shown in fig. 7, 8, 9 and 10); or in the fully retracted position (as shown in fig. 12), the included angle between the first connecting rod 53 and the second connecting rod 54 is an obtuse angle during normal rolling, and the cutting edge of the cutting knife 5 is retracted into the roller cavity 20 of the friction roller; the suction feature 24 is closed; the film roll 8 on the main winding shaft 4 is normally wound against the friction roller 2, as shown in fig. 7, 8, 9 and 10;
when the roll needs to be changed, the standby winding shaft 40 moves close and clings to the friction roller 2, the air exhaust part 24 is opened, after the elongated gap 21 rotates and passes through the compression roller but before the standby winding shaft 40, the air guide hole 91 of the second section of air guide pipe rotates to the air guide hole 90 aligned with the shaft sleeve, the air exhaust part is communicated with the roller cavity 20 of the friction roller through the air exhaust pipe 92 and the second section of air guide pipe 62, negative pressure is formed inside the roller cavity 20 of the friction roller 2, the air suction hole 22 on the surface of the friction roller 2 sucks the film, and meanwhile, the piston rod 520 of the air cylinder 52 performs the lifting or retracting action (if the piston rod 520 of the air cylinder 52 is in the fully extended position during normal winding, the piston rod 520 of the air cylinder 52 performs the retracting action at this stage, otherwise, if the piston rod 520 of the air cylinder 52 is in the fully retracted position during normal winding, the piston rod 520 of the air cylinder 52 performs the lifting action at this stage), in the process of the piston rod 520 of the air cylinder 52 performing the extending or retracting action, the included angle between the first connecting rod 53 and the second connecting rod 54 gradually increases and gradually decreases after reaching 180 degrees, wherein in the process of the included angle between the first connecting rod 53 and the second connecting rod 54 gradually increasing, the cutting edge of the cutter extends outwards, the film is cut off by the cutting edge of the cutter, and the film 80 is divided into a film front section and a film rear section after being cut off; when the piston rod 520 of the air cylinder 52 is in the middle of the telescopic moving track, the included angle between the first link 53 and the second link 54 reaches 180 degrees, and then the piston rod 520 of the air cylinder 52 keeps moving in the original direction, the included angle between the first link 53 and the second link 54 becomes smaller, the knife edge of the cutting knife retracts into the roller cavity 20 of the friction roller again, the piston rod 520 of the air cylinder 52 reaches the other extreme position (specifically, if the piston rod 520 of the air cylinder 52 is in the fully extended position during normal rolling, the piston rod 520 of the air cylinder 52 at this stage retracts and reaches the fully retracted extreme position, as shown in fig. 12), otherwise, if the piston rod 520 of the air cylinder 52 is in the fully retracted position during normal rolling, the piston rod 520 of the air cylinder 52 at this stage retracts and reaches the fully extended extreme position, as shown in fig. 8, 9, As shown in fig. 10).
After the film 80 is cut off, the air guide hole 91 of the second section of air guide tube rotates to be staggered with the air guide hole 90 of the shaft sleeve, as shown in fig. 11, the air exhaust part is not communicated with the roller cavity 20 of the friction roller any more, the negative pressure in the roller cavity 20 of the friction roller 2 disappears, the air suction hole 22 on the surface of the friction roller 2 can not suck the film 80 any more, the front section of the film is continuously coiled by the existing film roll, the front edge of the rear section of the film is stuck to the surface of a new paper core tube on a new main coiling shaft by double-faced adhesive paper, then, the new standby coiling shaft moves to the coiling position to become a new main coiling shaft, the original main coiling shaft and the film roll are moved away, then, the film roll is unloaded from the original main coiling shaft, the original main coiling shaft moves to the standby coiling position to become a new standby coiling shaft, and then the coil changing process is completed.
Claims (3)
1. A film surface rolling and reel changing cutter mounting structure comprises a rack, wherein a friction roller is mounted on the rack, the friction roller is hollow and forms a roller cavity, the friction roller is directly driven to rotate by a friction roller motor, the friction roller is provided with a rotating shaft, the axial direction of the friction roller is transverse, the rotating shaft of the friction roller comprises a left shaft head and a right shaft head, the left shaft head is connected with the central part of the left end surface of the friction roller, the right shaft head is connected with the central part of the right end surface of the friction roller, a compression roller is mounted beside the friction roller, the compression roller presses the friction roller, and a rolling shaft for rolling a film is further mounted on the rack; a cutter for cutting off the film is also arranged;
the method is characterized in that: a radially extending cutter guide rail is arranged in a roller cavity of the friction roller, and two ends of the cutter are movably arranged on the cutter guide rail and move along the cutter guide rail; the cutting edge of the cutter faces to the radial direction of the friction roller and the centrifugal direction of the friction roller, and the cutting edge of the cutter is in a sawtooth shape; the surface of the friction roller is also provided with a strip-shaped gap for exposing the cutting edge of the cutter, and the extending direction of the strip-shaped gap is parallel to the direction of the central axis of the friction roller; the surface parts of the friction rollers on the two sides of the strip-shaped gap are provided with air suction holes; the left section of shaft head and the right section of shaft head of the friction roller are hollow and respectively formed into straight strip-shaped air ducts, and the two sections of air ducts are respectively called a first section of air duct and a second section of air duct;
a cutter driving mechanism for driving the cutter to move along a cutter guide rail of the friction roller is also arranged in the roller cavity of the friction roller; the cutter driving mechanism comprises an air cylinder, a first connecting rod, a second connecting rod and a connecting rod support, the connecting rod support is fixedly installed inside the friction roller, the first end of the first connecting rod is hinged with the cutter through a first hinge shaft, the second end of the first connecting rod is hinged with the first end of the second connecting rod through a second hinge shaft, the second end of the second connecting rod is hinged with the connecting rod support through a third hinge shaft, and a piston rod of the air cylinder is hinged with the first connecting rod and the second connecting rod through second hinge shafts respectively; when the included angle between the first connecting rod and the second connecting rod is 180 degrees, the longitudinal direction of the first connecting rod and the second connecting rod is the radial direction of the friction roller, the cutting edge of the cutter is exposed out of the long strip-shaped gap of the friction roller, and the piston rod of the cylinder is positioned in the middle of the telescopic moving track of the cylinder; when a piston rod of the air cylinder is positioned at the end position of the telescopic moving track of the air cylinder, the included angle between the first connecting rod and the second connecting rod is less than 180 degrees, and the cutting edge of the cutter is hidden in the roller cavity of the friction roller; the friction roller is characterized in that an air exhaust component and an air source component for providing an air source for the air cylinder are further arranged outside the friction roller, the air source component is connected to the air cylinder inside the friction roller through a first section of air guide pipe, and the air exhaust component is communicated to a roller cavity of the friction roller through a second section of air guide pipe.
2. The film surface winding reel-changing cutter mounting structure according to claim 1, wherein: the end surface of the second section of air duct is closed to form a blind pipe, and the side surface of the second section of air duct is provided with an air guide hole; a fixed shaft sleeve is arranged outside the second section of the air duct, and an air guide port is formed in the side surface of the shaft sleeve; the air guide port is communicated with the air exhaust part; when the air guide hole of the second section of air guide pipe rotates to the air guide hole aligned with the shaft sleeve, the air exhaust part is communicated to the roller cavity of the friction roller through the second section of air guide pipe.
3. The film surface winding reel-changing cutter mounting structure according to claim 1, wherein: the end part of the first section of air duct is provided with a rotary joint, and the air source part is connected to the cylinder in the friction roller through the rotary joint and the first section of air duct.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511331.8A CN114147798B (en) | 2021-12-11 | 2021-12-11 | Film surface winding and reel changing cutter mounting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511331.8A CN114147798B (en) | 2021-12-11 | 2021-12-11 | Film surface winding and reel changing cutter mounting structure |
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| CN114147798A true CN114147798A (en) | 2022-03-08 |
| CN114147798B CN114147798B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111511331.8A Active CN114147798B (en) | 2021-12-11 | 2021-12-11 | Film surface winding and reel changing cutter mounting structure |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1035959A (en) * | 1996-07-25 | 1998-02-10 | Mitsubishi Heavy Ind Ltd | Film winding device |
| CN207827490U (en) * | 2018-01-27 | 2018-09-07 | 广东金明精机股份有限公司 | The coil replacing mechanism of film surface winding device |
| CN108557536A (en) * | 2018-04-28 | 2018-09-21 | 重庆瑞霆塑胶有限公司 | Wrap-up for film |
-
2021
- 2021-12-11 CN CN202111511331.8A patent/CN114147798B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1035959A (en) * | 1996-07-25 | 1998-02-10 | Mitsubishi Heavy Ind Ltd | Film winding device |
| CN207827490U (en) * | 2018-01-27 | 2018-09-07 | 广东金明精机股份有限公司 | The coil replacing mechanism of film surface winding device |
| CN108557536A (en) * | 2018-04-28 | 2018-09-21 | 重庆瑞霆塑胶有限公司 | Wrap-up for film |
Non-Patent Citations (1)
| Title |
|---|
| 翁崇喜;: "浅谈间隙式收卷机", 印刷工业, no. 07 * |
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| CN114147798B (en) | 2023-12-19 |
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