CN212531639U

CN212531639U - Wide plastic film winding and changing equipment without mandrel center winding mode

Info

Publication number: CN212531639U
Application number: CN202020501770.5U
Authority: CN
Inventors: 王全; 杨煜新; 李�浩
Original assignee: Guangdong Jinming Machinery Co Ltd
Current assignee: Guangdong Jinming Machinery Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-02-12
Anticipated expiration: 2030-04-08

Abstract

A wide plastic film winding and changing device without a mandrel center winding mode comprises a rack, wherein a front swing arm and a rear swing arm which synchronously swing are arranged on the rack, and main winding chucks are respectively arranged at the upper ends of the two swing arms; a cutter bracket is also arranged on the rack, and a cutter for cutting off the plastic film is arranged on the cutter bracket; a core storage cavity for storing the paper core barrel is arranged on the rack, preliminary winding supports are respectively arranged on the front side and the rear side of the core storage cavity, and preliminary winding chucks are arranged on the preliminary winding supports; a friction roller which extends longitudinally is arranged under the outlet of the core storage cavity, a left side roller is arranged at the left upper part of the friction roller, and a right side carrier roller is arranged at the right side of the friction roller. The utility model discloses can realize automatically that the non-stop is traded a roll, and rolling in-process refill section of thick bamboo and membrane book can not bending deformation.

Description

Wide plastic film winding and changing equipment without mandrel center winding mode

Technical Field

The utility model belongs to the technical field of the plastic film rolling is traded and is rolled up, concretely relates to broad width plastic film rolling equipment of trading suitable for centreless axle center rolling mode.

Background

The plastic film can be rolled on the paper core cylinder after being produced and formed to form a coiled material, the surface of the paper core cylinder used in the rolling process is provided with bonding materials, the outer diameter of the standard paper core cylinder is 96-110 mm, and the thickness of the wall of the paper core cylinder is about 2 mm. When the film roll wound by the paper core cylinder reaches a set diameter, the roll needs to be changed. In the roll changing process, the original film roll stops rolling, the upstream plastic film is still continuously conveyed to the rolling station, and if the roll changing process is not stopped, a new paper core cylinder is required to be capable of rolling the plastic film during roll changing, namely the new paper core cylinder and the original film roll can realize seamless connection.

The first mode is central winding, and as the name suggests, the power for the film roll to rotate directly comes from a component positioned on the central axis of the film roll, such as a clamping shaft or a winding chuck for clamping the film roll, and the clamping shaft or the winding chuck is driven by a motor; the second type is surface rolling, which is to use a friction roller contacted with the surface of the film roll to rub the film roll by surface friction so as to drive the film roll to rotate. Due to the difference of power sources, the two reeling modes are different in equipment structure, film roll supporting mode and reeling shaft support structure, so that the two reeling modes are respectively suitable for different film roll materials (surface friction coefficient), film roll diameters, film roll widths and reeling speeds.

The above-mentioned central winding mode can be divided into a spindle mode and a coreless mode according to the supporting mode. The mode of the mandrel is that an air expansion shaft penetrates through a paper core cylinder, and a motor drives the air expansion shaft to rotate during winding; the mandrel-free mode is provided with a pair of oppositely arranged rolling chucks (such as inflatable chucks), the direction of the central axis of the rolling chucks is longitudinal, the two inflatable chucks are matched with an inflatable chuck longitudinal driving mechanism for driving the inflatable chucks to move longitudinally and an inflatable chuck self-rotating motor for driving the inflatable chucks to self-rotate, when the mandrel-free rolling device works, the two inflatable chucks are respectively inserted into two end parts of the paper core tube and clamp (tightly expand) the paper core tube from the radial direction of the paper core tube, and when the mandrel-free rolling device works, the motor drives the two inflatable chucks to self-rotate.

After the winding is finished, the film roll needs to be unloaded from two winding chucks (such as an inflatable chuck) and automatically falls to a specified position, and the process is also called as roll unloading. In order to stably support the film roll and facilitate roll unloading in the rolling process, a rolling chuck (such as an inflatable chuck) without a central rolling mode of a mandrel is generally arranged on a swing arm, the swing arm is provided with a longitudinal swing shaft, and the swing arm drives the inflatable chuck to swing around the swing shaft between a normal rolling position and a roll unloading position.

Although the above techniques are mature prior art, they have new problems when applied to wide width plastic films. The "wide plastic film" means a plastic film having a width of more than 3 m, for example, an agricultural film, an aviation plastic film, a wind power plastic film, or the like may have a width of eight m. Wide plastic films are generally not suitable for the mandrel method because, if the mandrel method is used, the air shaft is difficult to pull out of the cylinder cavity of the paper core cylinder, the moving distance of the air shaft is at least equal to the width of the plastic film, the operating space of the air shaft is at least equal to twice the width of the plastic film, for example, for a plastic film with the width of 8 meters, at least 16 meters are needed, and at least 8 meters are needed to axially separate the air shaft and the paper core cylinder. Therefore, the wide plastic film can only be used in a coreless mode, namely, the film roll is clamped by two rolling chucks at two ends of the paper core cylinder. However, the wide plastic film has an excessively large width, so that the winding and roll changing process of the wide plastic film without the central winding die of the mandrel is difficult, and the following reasons mainly exist: the paper core tube is long (may be eight meters long) and small in diameter (only about 10 centimeters), the wall of the paper core tube is only about 2mm, and the paper core tube is only clamped by two winding chucks at the end part, so that the middle part of the paper core tube can bend downwards under the action of gravity, and in addition, under the action of tension formed by winding tension, the middle part of the paper core tube can bend due to tension, the paper core rotates at high speed, and the bending deformation is increased by centrifugal force; the deformation of a paper core cylinder inevitably influences the rolling quality, and the rolling quality comprises deformation of a film roll, poor flatness of the end face of the film roll and influence of compactness of the film roll.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned shortcoming and provide a broad width plastic film rolling equipment of changing of lap of coreless center rolling mode, it can realize not shutting down automatically and change the book, and rolling in-process refill section of thick bamboo and membrane book can not bending deformation.

The purpose can be realized according to the following scheme: a wide plastic film winding and roll changing device without a mandrel center winding mode comprises a rack, wherein a front swing arm and a rear swing arm are arranged on the rack, the swing shaft direction of the front swing arm and the rear swing arm is longitudinal, the swing shafts of the two swing arms are positioned at the lower ends of the swing arms, main winding chucks are respectively arranged at the upper ends of the two swing arms, the central axis of each main winding chuck is longitudinal, and each swing arm is further provided with a main winding motor for driving the main winding chuck to rotate and a first longitudinal driving mechanism for driving the main winding chuck to move longitudinally; the swing arm drives the main winding chuck to swing between different working positions; when the swing arm swings to the right end of the swing track, the main winding chuck is in a coil unloading position; when the swing arm swings to the middle section of the swing track, the main winding chuck is in a normal winding position;

a cutter bracket is also arranged on the rack, and a cutter for cutting off the plastic film is arranged on the cutter bracket; a cutter cylinder for driving the cutter bracket to move up and down is also arranged;

a core storage cavity for storing the paper core barrel is arranged on the rack, the core storage cavity is positioned above the left side of the swing arm, an outlet with a downward opening is formed in the lower end of the core storage cavity, the length direction of the core storage cavity is longitudinal, and the transverse width of the outlet of the core storage cavity can accommodate one paper core barrel to pass through; the outlet of the core storage cavity is also provided with a brake block for controlling the opening and closing state of the outlet and a horizontal cylinder for driving the brake block to move horizontally; the cavity walls of the front and the rear surfaces of the core storage cavity are open at the position close to the outlet;

the method is characterized in that: the front side and the rear side of the core storage cavity are respectively provided with a primary winding support, the primary winding support is provided with a primary winding chuck, a primary winding motor for driving the primary winding chuck to rotate, a vertical cylinder for driving the primary winding support to move vertically and a second longitudinal driving mechanism for driving the primary winding chuck to move longitudinally;

when the primary winding support moves to the uppermost end of the moving track of the primary winding support, the vertical positions of the two primary winding chucks are aligned with the cylinder cavity of the lowest paper core cylinder in the core storage cavity; when the primary winding support moves to the lowest end of the moving track and the cutter support moves to the uppermost end of the moving track, the cutter is positioned at the upper right part of the central axis of the primary winding chuck; when the cutter support moves to the lower end of the moving track, the position of the cutter support avoids the swinging track of the main rolling chuck swinging around the swinging arm swinging shaft;

a friction roller extending longitudinally is arranged right below the outlet of the core storage cavity, and a friction roller motor for driving the friction roller to rotate is arranged on the rack; the rotation direction of the friction roller is clockwise;

a bending section bent towards the left is formed at the upper end of the swing arm, and the main winding chuck is installed at the tail end of the bending section;

when the swing arm swings to the limit position leftwards, the central axis of the main winding chuck is positioned right below the outlet of the core storage cavity and is also positioned right above the central axis of the friction roller, and the vertical distance between the central axis of the main winding chuck and the surface of the friction roller is 150-380 mm;

a left side roller is arranged above the left side of the friction roller, the front end and the rear end of the left side roller are arranged on a left side roller bracket, the left side roller bracket can be transversely arranged on the rack in a swinging manner, and a thrust cylinder for applying right thrust to the left side roller bracket is also arranged;

a right carrier roller is further arranged on the right side of the friction roller, the front end and the rear end of the right carrier roller are mounted on a right carrier roller bracket, and the right carrier roller bracket can be mounted on the rack in an up-and-down swinging manner; a carrier roller cylinder for driving the right carrier roller bracket to swing up and down is also arranged; when the swing arm swings to the limit position leftwards and the right carrier roller support swings upwards to the upper end of the swing track, the right carrier roller is positioned at the right lower part of the central axis of the main rolling chuck.

Preferably, the cutter support is further provided with a plurality of air blowing openings, the air blowing openings are arranged longitudinally, and the air blowing openings face towards the left.

The distance from the central axis of the main winding chuck to the circumferential surface of the right idler is equal to the distance from the central axis of the main winding chuck to the central axis of the right idler minus the radius of the right idler. The distance from the central axis of the main winding chuck to the circumferential surface of the friction roller is equal to the distance from the central axis of the main winding chuck to the central axis of the right idler roller minus the radius of the friction roller.

The so-called "main rolling chuck" is just because the chuck is used in the main rolling stage, so the three characters of "main rolling" are added when naming. Similarly, the "main winding motor" is just named because the motor is used in the main winding stage, and three words of "main winding" are added. The three words of "main rolling" do not limit the structural features of the chuck or the motor.

In the same way, "preliminary rolling" word eye inside "preliminary rolling support", "preliminary rolling chuck", "preliminary rolling motor", only indicate that this component is used for preliminary rolling stage, and do not restrict the structural feature of component.

The utility model has the advantages of it is following and effect:

one, the utility model discloses on the basis of realizing not shutting down and changing a roll, still realize that rolling in-process refill section of thick bamboo and membrane book can not bending deformation, specifically as follows: the utility model discloses will divide into preliminary rolling stage and normal rolling stage with the rolling process, and the boundary point in two stages is that the membrane roll radius equals the vertical distance between main rolling chuck central axis and the friction roller surface. In the primary winding stage, the film roll and the paper core cylinder are supported upwards by the friction roller, so that the film roll and the paper core cylinder are not bent and deformed due to gravity; when the normal rolling is started, the radius of the film roll is equal to the vertical distance between the central axis of the main rolling chuck and the surface of the friction roller, the diameter of the film roll at the moment is about 2.5 times to 4 times of the diameter of the paper core cylinder, and the radial thickness of the film roll (namely the radius of the film roll minus the radius of the paper core cylinder) is about 50 times of the wall thickness (radial thickness) of the paper core cylinder, so that the integral bending resistance of the film roll is improved by thousands of times (the bending resistance is in direct proportion to the square of the radial wall thickness) compared with the bending resistance when the initial rolling is started, namely, the film roll has enough bending resistance, the diameter of the film roll is continuously increased in the normal rolling stage, and the paper core cylinder and the film roll cannot be bent in the normal rolling stage.

In the transition stage between the primary winding stage and the normal winding stage, although the winding chuck does not provide power, the winding chuck does not fixedly clamp the film roll, but in the transition stage, the film roll has enough weight to be pressed on the friction roller, so that the friction roller can provide enough friction force to keep the film roll rotating, and meanwhile, the friction roller, the left side roller and the right side carrier roller form a semi-surrounding structure for the film roll, so that the position stability of the film roll is ensured; and the right carrier roller ensures that the film roll cannot roll off rightwards due to the rightwards rubbing power generated by the clockwise rotation of the friction roller.

Third, preliminary rolling stage, membrane book weight is lighter, means that rolling motor can be miniaturized, and then makes the part weight that vertical cylinder bore, and normal rolling stage membrane book weight is great, and the rolling motor weight in normal rolling stage is big. The utility model discloses handing in the preliminary rolling motor of miniaturization by the vertical cylinder of weak and being responsible for bearing, handing in the normal rolling motor of heaviness by the swing arm of rigidity and being responsible for bearing, wholly arrange rationally, avoid vertical cylinder to bear too big and embarrassing heavy.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment of the present invention in a normal rolling state.

Fig. 2 is a partially enlarged schematic view of the core storage cavity, the primary winding bracket and the winding paper core barrel in fig. 1.

Fig. 3 is a partially enlarged schematic view of the swing arm in fig. 1.

Fig. 4 is a perspective view of the structure shown in fig. 2.

Fig. 5 is a partially enlarged schematic view of H in fig. 4.

Fig. 6 is a schematic diagram showing the change state of the preliminary winding support in fig. 1 after moving down and the cutter support after moving up.

FIG. 7 is a partial schematic view showing a state in which a cutter cuts a plastic film at the moment

Fig. 8 is a schematic diagram showing the changed state of the cutter holder in fig. 6 after moving down and the swing arm swinging to the right to the coil-unloading position.

Fig. 9 is a schematic diagram of the changed state of the primary winding bracket in fig. 8 after primary winding and upward movement are completed, the right carrier roller bracket swings upwards, and the main winding chuck unloads the coil.

Fig. 10 is a partially enlarged schematic view of fig. 9.

Fig. 11 is a schematic diagram of a changed state after the swing arm swings leftwards to the left end of the swing track and the right idler bracket swings downwards in fig. 9.

Detailed Description

Fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5 illustrate a wide plastic film winding and rewinding device without a mandrel center winding manner, which includes a frame, a front swing arm 1 and a rear swing arm 1 that swing synchronously are mounted on the frame, the extending direction of the swing shafts 10 of the front swing arm 1 and the rear swing arm 1 is longitudinal, the swing shafts 10 of the two swing arms are located at the lower ends of the swing arms 1, a bending section 11 that bends to the left is formed at the upper end of the swing arms 1, a main winding chuck 2 is mounted at the tail end of the bending section 11, the main winding chuck 2 is an inflatable chuck, the central axis of the main winding chuck 2 is longitudinal, a main winding motor 21 that drives the main winding chuck 2 to rotate and a first longitudinal driving mechanism that drives the main winding chuck 2 to move longitudinally are further mounted on each swing arm 1, and the main winding chuck 2 is driven to rotate by a;

the swing arm 1 drives the main winding chuck 2 to swing between different working positions; when the swing arm 1 swings to the right end of the swing track, the main winding chuck 2 is in the unwinding position, as shown in fig. 8 and 9; when the swing arm 1 swings to the middle section of the swing track, the main winding chuck 2 is in the normal winding position, as shown in fig. 1 and 6. As shown in fig. 1 and 7, a cutter bracket 31 is further mounted on the frame, and a cutter 3 for cutting off the plastic film is mounted on the cutter bracket 31; the cutter bracket 31 is also provided with a plurality of air blowing openings 32, each air blowing opening 32 is arranged along the longitudinal direction, and each air blowing opening 32 faces towards the left; a cutter cylinder 33 for driving the cutter holder 31 to move up and down is further provided.

As shown in fig. 1 and 2, a core storage cavity 4 for storing a paper core tube is mounted on the frame, the core storage cavity 4 is positioned above the left side of the swing arm 1, an outlet 40 with a downward opening is formed in the lower end of the core storage cavity 4, the length direction of the core storage cavity 4 is longitudinal, and the transverse width of the outlet 40 of the core storage cavity can accommodate one paper core tube to pass through; the outlet 40 of the core storage cavity is also provided with a brake block 41 for controlling the opening and closing state of the outlet and a horizontal cylinder 42 for driving the brake block 41 to horizontally and transversely move; the front and rear walls 43 of the cartridge chamber 4 are open at a position close to the outlet 40 (so that the primary winding chuck 5 can be inserted longitudinally into the cartridge chamber 4 and longitudinally into the end of the lowermost core barrel chamber).

As shown in fig. 1, 4 and 5, the front side and the rear side of the core storage cavity 4 are respectively provided with a primary winding support 54, each primary winding support 54 is provided with a primary winding chuck 5, a primary winding motor 51 for driving the primary winding chuck 5 to rotate, a vertical cylinder 52 for driving the primary winding support 51 to move vertically, and a second longitudinal driving mechanism 53 (i.e. a longitudinal driving motor) for driving the primary winding chuck 5 to move longitudinally; the primary winding chuck 5 is also an inflatable chuck.

When the primary winding support 54 moves to the uppermost end of the moving track, the vertical positions of the two primary winding chucks 5 are aligned with the cylinder cavity of the lowest paper core cylinder in the core storage cavity 4, as shown in fig. 1 and 5; when the primary winding support 54 moves to the lowermost end of the moving track thereof and the cutter support 31 moves to the uppermost end of the moving track thereof, the cutter 3 is positioned at the upper right of the central axis of the primary winding chuck 5, as shown in fig. 6 and 7; when the cutter support 3 moves to the lower end of the moving track, the position of the cutter support 3 avoids the swinging track of the main winding chuck 2 swinging around the swinging arm swinging shaft 10, as shown in fig. 1 and 11.

As shown in fig. 1, 10 and 6, a longitudinally extending friction roller 6 is arranged right below the outlet 40 of the core storage cavity, and a friction roller motor for driving the friction roller 6 to rotate is arranged on the frame; the rotation direction of the rubbing roller 6 is clockwise. When the swing arm 1 swings leftwards (namely swings anticlockwise) to the limit position, the central axis of the main winding chuck 2 is positioned right below the core storage cavity outlet 40 and also positioned right above the central axis of the friction roller 6, and the vertical distance h between the central axis of the main winding chuck 2 and the surface of the friction roller 6 is 250mm, as shown in fig. 11;

as shown in fig. 1, 10 and 6, a left roller 7 is further provided above the friction roller 6, the front and rear ends of the left roller 7 are mounted on a left roller bracket 70, the left roller bracket 70 is mounted on the frame so as to be capable of transversely swinging, and a thrust cylinder 71 for applying a rightward thrust to the left roller bracket 70 is further provided; a right carrier roller 9 is further arranged on the right side of the friction roller 6, the front end and the rear end of the right carrier roller 9 are mounted on a right carrier roller bracket 90, the right carrier roller bracket 90 can be mounted on the rack in an up-and-down swinging mode, and the swinging central axis of the right carrier roller bracket 90 is overlapped with the central axis of the friction roller 6; a carrier roller cylinder 91 for driving the right carrier roller bracket 90 to swing up and down is also arranged; when the swing arm 1 swings to the extreme position leftwards and the right carrier roller bracket 91 swings upwards to the upper end of the swing track, the right carrier roller 9 is positioned at the right lower part of the central axis of the main winding chuck 2, and the distance from the central axis of the main winding chuck 2 to the circumferential surface of the right carrier roller 9 is equal to the vertical distance between the central axis of the main winding chuck 2 and the surface of the friction roller 6, as shown in fig. 11.

The use method of the embodiment sequentially comprises the following steps:

(1) during normal rolling, the right carrier roller bracket 90 is positioned at the lower end of the swing track, the cutter bracket 31 is positioned at the lower end of the moving track, the primary rolling bracket 54 is positioned at the uppermost end of the moving track, the brake block 41 is positioned right below the core storage cavity outlet 40 to seal the core storage cavity outlet, and all the core barrels (including the lowest core barrel 80) in the core storage cavity cannot fall down, as shown in fig. 1; when in normal rolling, the friction roller 6 keeps rotating, the front and the rear swing arms 1 are positioned at the middle sections of the swing tracks, the front and the rear main rolling chucks 2 are positioned at normal rolling positions, a paper core tube 8 is clamped between the front and the rear main rolling chucks 2, the axial direction of the paper core tube 8 is longitudinal, a film roll 81 is wound on the paper core tube 8, and the front and the rear main rolling chucks 2 are respectively inserted at the front and the rear ends of a tube cavity of the paper core tube 8; the main winding motor 21 drives the front and rear main winding chucks 2 to rotate, the front and rear main winding chucks 2 drive the paper core cylinder 8 and the film roll 81 to rotate, and the plastic film 83 conveyed from the upstream continuously winds the film roll 81 which bypasses the upper part of the friction roller 6 and is clamped by the main winding chucks 2, as shown in fig. 1 and 3;

(2) when the diameter of the film roll 81 clamped by the main winding chuck 2 reaches a set value, the film roll 81 becomes an old film roll; the second longitudinal driving mechanism 53 drives the front and rear preliminary winding chucks 5 to be respectively inserted into the front and rear ends of the cavity of the lowest paper core cylinder 80 in the core storage cavity 4 along the longitudinal direction, the lowest paper core cylinder 80 becomes a new paper core cylinder, the horizontal cylinder 42 drives the brake block 41 to leave the core storage cavity outlet 40 so as to temporarily open the core storage cavity outlet 40, as shown in fig. 2, the vertical cylinder 52 drives the preliminary winding support 54, the new paper core cylinder 80, the front and rear preliminary winding chucks 5, the front and rear preliminary winding motors 51 to descend, and then the horizontal cylinder 42 drives the brake block 41 to return to the position right below the core storage cavity outlet 40 so as to restore the core storage cavity outlet 40 to a closed state;

(3) the new paper core cylinder 80 is lowered to the position contacting the friction roller 6, as shown in fig. 6, the cutter cylinder 33 drives the cutter bracket 31 to move to the uppermost end of the moving track, the cutter 3 comes to the upper right of the new paper core cylinder 80, as shown in fig. 6 and 7, then the cutter 3 cuts the plastic film 83 along the longitudinal direction, the plastic film 83 is cut into a left half part and a right half part, the AB section in fig. 7 belongs to the right half part, the BCD section in fig. 7 belongs to the left half part, and the right half part (AB section in fig. 7) of the plastic film is rolled by the old film roll 81 on the main rolling chuck 2; each air blowing port 32 on the cutter bracket 31 blows air to the right end section (CB section in figure 7) of the left half part of the plastic film 83, so that the right end section (CB section in figure 7) of the left half part of the plastic film 83 is attached to the surface of the new paper core cylinder 80, the preliminary rolling motor 51 drives the preliminary rolling chuck 5 to rotate, the preliminary rolling chuck 5 drives the new paper core cylinder 80 to rotate to roll the plastic film 83 conveyed from the upstream, and the preliminary rolling is started to form a new film roll 82; in the primary winding process, the new film roll 82 keeps in contact with the surface of the friction roller 6, the friction roller 6 keeps rotating, and the thrust cylinder 71 exerts rightward supporting force on the left roller bracket 70; in the primary winding process, the swing arm 1 swings to the right end of the swing track, the main winding chucks 2 and the old film roll 81 come to the unwinding position, as shown in fig. 8, the first longitudinal driving mechanism drives the front and rear main winding chucks 2 to respectively separate from the cylinder cavity of the paper core cylinder 8 of the old film roll 81, so that the old film roll 81 is unwound, as shown in fig. 9; in the primary winding process, the cutter cylinder 33 drives the cutter bracket 31 to move to the lowest end of the moving track, and the cutter 3 and the blowing port 32 move to the lowest end of the moving track along with the cutter bracket 31, as shown in fig. 8 and 9;

(4) when the radius of the new film roll 82 is equal to the vertical distance between the central axis of the main rolling chuck 2 and the surface of the friction roller 6 (namely equal to 250 mm), the carrier roller cylinder 91 drives the right carrier roller bracket 90 to swing upwards to the upper end of the swing track, the right carrier roller 9 comes to the lower right of the new film roll 82 and contacts the surface of the new film roll 82, as shown in fig. 9, then the second longitudinal driving mechanism 53 drives the front and rear preliminary rolling chucks 5 to respectively separate from the cylinder cavity of the new paper core cylinder 80 from the longitudinal direction, and the vertical cylinder 52 drives the preliminary rolling bracket 54 and the preliminary rolling chucks 5 to ascend to the uppermost end of the moving track, as shown in fig. 9 and 10; after the two primary winding chucks 5 are respectively separated from the cavity of the new paper core cylinder 80, the weight of the new film roll 82 is pressed on the friction roller 6, the friction roller 6 rubs the new film roll 82 to keep rotating, and the new film roll 82 still keeps continuously winding the plastic film 83 conveyed from the upstream, as shown in fig. 9 and 10;

(5) the swing arm 1 swings to the left end of the swing track, and the two main winding chucks 2 respectively move to the front side and the rear side of the new paper core cylinder 80 corresponding to the new film roll 82, as shown in fig. 11; the first longitudinal driving mechanism drives the front and the rear main winding chucks 2 to be respectively inserted into the front and the rear ends of the cylinder cavity of the new paper core cylinder 80, the main winding motor 21 drives the front and the rear main winding chucks 2 to rotate, and at the moment, the new film roll 82 clamped by the two main winding chucks 2 starts to be driven by the front and the rear main winding chucks 2 to rotate; then the carrier roller cylinder 91 drives the right carrier roller bracket 90 to swing downwards to the lower end of the swing track, the right carrier roller 90 leaves the new film roll 82, the swing arm 1 swings rightwards to the middle section of the swing track, the new paper core cylinder 80, the new film roll 82 and the main winding chuck 2 move to the normal winding position, the new film roll 82 becomes the film roll in the next normal winding process, the new paper core cylinder 80 becomes the paper core cylinder in the next normal winding process, the normal winding state in the step (1) is returned, namely the state shown in fig. 1 is returned, and the process is circulated continuously.

In the first embodiment, when the swing arm swings to the extreme position leftwards, the vertical distance h between the central axis of the main winding chuck and the surface of the friction roller can be changed to 150 mm or 380 mm; accordingly, in step (4) of example two, the radius of the new film roll 82 may be changed to 150 mm, or 380 mm.

Claims

1. A wide plastic film winding and roll changing device without a mandrel center winding mode comprises a rack, wherein a front swing arm and a rear swing arm are arranged on the rack, the swing shaft direction of the front swing arm and the rear swing arm is longitudinal, the swing shafts of the two swing arms are positioned at the lower ends of the swing arms, main winding chucks are respectively arranged at the upper ends of the two swing arms, the central axis of each main winding chuck is longitudinal, and each swing arm is further provided with a main winding motor for driving the main winding chuck to rotate and a first longitudinal driving mechanism for driving the main winding chuck to move longitudinally; the swing arm drives the main winding chuck to swing between different working positions; when the swing arm swings to the right end of the swing track, the main winding chuck is in a coil unloading position; when the swing arm swings to the middle section of the swing track, the main winding chuck is in a normal winding position; a cutter bracket is also arranged on the rack, and a cutter for cutting off the plastic film is arranged on the cutter bracket; a cutter cylinder for driving the cutter bracket to move up and down is also arranged;

when the primary winding support moves to the uppermost end of the moving track of the primary winding support, the vertical positions of the two primary winding chucks are aligned with the cylinder cavity of the lowest paper core cylinder in the core storage cavity; when the primary winding support moves to the lowest end of the moving track and the cutter support moves to the uppermost end of the moving track, the cutter is positioned at the upper right part of the central axis of the primary winding chuck;

2. The wide plastic film winding and rewinding device without the mandrel center winding manner according to claim 1, wherein: the cutter bracket is also provided with an air blowing port.