A device and method for repairing a web paper core tube for a high-speed automatic gravure printing machine

Abstract

The present invention provides a paper core tube repair device and repair method for a high-speed automatic gravure printing machine, including paper core tube repair devices of different sizes, each of which includes a conical surface and a cylinder connected in sequence; for paper core tube repair devices of adjacent sizes, the cylinder of the small-sized paper core tube repair device can be fixedly connected to the conical surface of the large-sized paper core tube repair device, and the connection part has a smooth transition; the paper core tube repair devices of different sizes are all hollow structures, and are provided with a through hole that can pass through the same screw. The present invention can make the deformed paper core tube of the paper roll basically restored to the original circular paper core tube under the repair of the device, so that the air expansion shaft can smoothly pass through the paper core tube, and the paper roll is fixed on the air expansion shaft under the action of air pressure, and then the machine is put into production normally.

Description

Technical Field

[0001] The invention relates to a device for repairing a deformation of a paper core tube of a roll paper, in particular to a device and a method for repairing a paper core tube of a roll paper used in a high-speed automatic gravure printing machine. Background Art

[0002] As a kind of printing technology, gravure printing occupies an important position in the field of printing and packaging due to its advantages such as thick ink layer, bright colors, high saturation, stable quality of printed products and fast printing speed. The paper used by gravure printing machines is roll paper, and its paper core tube is round. According to customer needs, the size of the paper core tube of the roll paper, the width of the paper roll and the outer diameter of the paper roll are different. The weight of each roll of paper is also different. The lightest is 300kg and the heaviest is close to 1000kg. The paper core tube has three specifications: 3 inches, 6 inches and 12 inches. The paper core tube of roll paper is mainly made of waste paper as raw material. It is rolled into a tube by a tube rolling machine and then extruded. Therefore, its pressure bearing capacity has a certain limit. It will be subject to a certain degree of external force during production handling, transportation, warehousing and transportation. Under normal circumstances, the paper core tube will not be deformed, but accidents are inevitable during the loading and unloading process and transportation. Under the action of abnormal external force, the paper core tube of the roll paper will be deformed, resulting in the paper core tube no longer being round. The round air expansion shaft of the deformed paper core tube cannot pass through the paper core tube smoothly, and it cannot be used on the machine. It can only be returned to the paper manufacturer for re-production, which increases the transportation and production costs of the paper manufacturer. If an accident occurs during transportation, the number of deformed paper rolls of the paper core tube of the roll paper will increase, resulting in insufficient normal paper rolls for production and use, affecting production progress and delivery time. Sometimes accidents may occur during storage and transportation in printing plants, causing the paper core tube of the roll paper to deform and cannot be used on the machine. It can only be treated as waste paper, and the selling price of waste paper is only one-tenth of the original paper price, which increases the production cost of the printing plant. If a paper core tube deformation repair device for roll paper can be invented, the deformed paper core tube of the roll paper can be repaired and reused, which will not increase the production cost of the supplier and the user, and can also ensure normal production and timely delivery. Summary of the invention

[0003] The present invention provides a device and method for repairing a paper core tube of a roll paper for a high-speed automatic gravure printing machine, which solves the problem that the paper core tube of a roll paper for a gravure printing machine cannot be used on the machine after being deformed, affecting normal production and increasing the production costs of the supplier and the user. The technical solution is as follows:

[0004] A roll paper core tube repair device for a high-speed automatic gravure printing machine comprises paper core tube repair devices of different sizes, each of which comprises a conical surface and a cylinder connected in sequence; for paper core tube repair devices of adjacent sizes, the cylinder of the small-sized paper core tube repair device can be fixedly connected to the conical surface of the large-sized paper core tube repair device, and the connection part has a smooth transition; the paper core tube repair devices of different sizes are all hollow structures and are provided with a through hole that can pass the same screw rod.

[0005] The paper core tube repair device includes a first paper core tube repair device, a second paper core tube repair device and a third paper core tube repair device; in the first paper core tube repair device, it is divided into a first conical surface and a first cylinder from right to left; in the second paper core tube repair device, it is divided into a second conical surface and a second cylinder from right to left, and in the third paper core tube repair device, it is divided into a third conical surface and a third cylinder from right to left.

[0006] In the third paper core tube repair device, the outer diameter of the third cylinder is 3 inches, the outer diameter of the cone tip of the third conical surface is 1.5 inches, and the circular surface of the third cylinder is evenly provided with third threaded screw holes.

[0007] In the second paper core tube repair device, the outer diameter of the second cylinder is 6 inches, the outer diameter of the cone tip of the second conical surface is 3 inches, and the circular surface of the second cylinder is evenly provided with second threaded screw holes; and second non-threaded penetrating screw holes are evenly provided. The second penetrating screw holes match the threaded third screw holes of the third paper core tube repair device and are fixed by screws.

[0008] In the first paper core tube repair device, the outer diameter of the first cylinder is 12 inches, the outer diameter of the cone tip of the first conical surface is 6 inches, and a first non-threaded penetrating screw hole is provided on the circular surface of the first cylinder, which is used to cooperate with the threaded second screw hole of the second paper core tube repair device and be fixed by screws.

[0009] The outer diameter of the cone tip of the conical surface of the large-sized paper core tube repair device is the same as the outer diameter of the cylinder of the adjacent large-sized paper core tube repair device.

[0010] It also includes a rubber pad, a steel sleeve, a steel washer, a nut, a screw rod used in conjunction with the nut, and a support frame. The rubber pad, steel sleeve, and steel washer are all provided with different sizes corresponding to the paper core tube repair device. One end of the screw rod passes through the paper core tube repair device, the paper core tube of the roll paper to be repaired, the rubber pad, steel sleeve, steel washer, and nut in sequence. The lower ends of the rubber pad, steel sleeve, and steel washer are supported by the arc-shaped supporting pad of the support frame, and the other end of the screw rod is provided with a convex portion.

[0011] A method for repairing a paper core of a roll paper for a high-speed automatic gravure printing machine, when repairing a 3-inch paper core tube, one end of a screw rod sequentially passes through a third paper core tube repairing device, a 3-inch paper core tube of a roll paper, a third rubber pad, a third steel sleeve, a third steel washer and a nut, the lower ends of the third rubber pad, the third steel sleeve and the third steel washer are supported by a third arc-shaped supporting pad, wherein the sizes of the third rubber pad, the third steel sleeve, the third steel washer and the third arc-shaped supporting pad correspond to 3 inches; the method comprises the following steps:

[0012] S1: Use a wrench to rotate the nut. During the rotation, the third steel washer, the third steel sleeve, and the third rubber pad gradually approach the end surface of the web until they are pressed tightly.

[0013] S2: Continue to rotate the nut, the screw will move axially, and the convex part at the other end of the screw will gradually press the third paper core tube repair device into the 3-inch paper core tube of the roll paper;

[0014] S3: Continue to rotate the nut, and the third paper core tube repairing device gradually props up the deformed paper core tube under the action of the third conical surface, until the entire third paper core tube repairing device completely enters the 3-inch paper core tube and comes out from the other end;

[0015] At this time, the third paper core tube repairing device restores the deformed 3-inch paper core tube to the original round tube under the shaping of the third cylindrical surface.

[0016] Further, when repairing a 6-inch paper core tube, first fix the second paper core tube repair device and the third paper core tube repair device, and pass one end of the screw rod through the second paper core tube repair device, the third paper core tube repair device, the 6-inch web paper core tube, the second rubber pad, the second steel sleeve, the second steel washer and the nut in sequence, and the lower ends of the second rubber pad, the second steel sleeve and the second steel washer are supported by the second arc-shaped support pad, wherein the size of the second rubber pad, the second steel sleeve, the second steel washer and the second arc-shaped support pad corresponds to 6 inches; comprising the following steps:

[0017] S11: The nut is rotated with a wrench. During the rotation, the second steel washer, the second steel sleeve, and the second rubber pad gradually approach the end surface of the web until they are pressed tightly.

[0018] S12: Continue to rotate the nut, the screw will move axially, and the convex part at the other end of the screw will gradually press the third paper core tube repairing device and the second paper core tube repairing device into the 6-inch paper core tube of the roll paper;

[0019] S13: Continue to rotate the nut, the third paper core tube repairing device under the action of the third conical surface, and the second paper core tube repairing device under the action of the second conical surface gradually prop up the deformed paper core tube, until the entire second paper core tube repairing device completely enters the 6-inch paper core tube and comes out from the other end;

[0020] At this time, the third paper core tube repairing device is under the shaping of the third cylindrical surface, and the second paper core tube repairing device is under the shaping of the second cylindrical surface, so that the deformed 6-inch paper core tube is restored to the original round tube.

[0021] Further, when repairing a 12-inch paper core tube, the first paper core tube repairing device, the second paper core tube repairing device and the third paper core tube repairing device are fixed, and one end of the screw rod is sequentially passed through the first paper core tube repairing device, the second paper core tube repairing device, the third paper core tube repairing device, the 12-inch web paper core tube, the rubber pad, the steel sleeve, the steel washer and the nut, and the lower ends of the rubber pad, the steel sleeve and the steel washer are supported by an arc-shaped supporting pad, wherein the size of the rubber pad, the steel sleeve, the steel washer and the arc-shaped supporting pad corresponds to 12 inches; comprising the following steps:

[0022] S21: The nut is rotated with a wrench. During the rotation, the steel washer, the steel sleeve, and the rubber pad gradually approach the end surface of the web until they are pressed tightly.

[0023] S22: Continue to rotate the nut, the screw moves axially, and the convex portion at the other end of the screw gradually presses the third paper core tube repairing device, the second paper core tube repairing device and the first paper core tube repairing device into the 12-inch paper core tube of the web;

[0024] S23: Continue to rotate the nut, the third paper core tube repairing device under the action of the third conical surface, the second paper core tube repairing device under the action of the second conical surface, and the first paper core tube repairing device under the action of the first conical surface gradually prop up the deformed paper core tube until the entire first paper core tube repairing device completely enters the 12-inch paper core tube and comes out from the other end;

[0025] At this time, the third paper core tube repair device is shaped by the third cylindrical surface, the second paper core tube repair device is shaped by the second cylindrical surface, and the first paper core tube repair device is acted upon by the first cylindrical surface, so that the deformed 12-inch paper core tube is restored to its original round tube.

[0026] The device and method for repairing the paper core tube of a roll paper for a high-speed automatic gravure printing machine can restore the deformed paper core tube of the roll paper to its original round shape under the repair of the device, so that the air-expanding shaft can smoothly pass through the paper core tube, and the roll paper is fixed on the air-expanding shaft under the action of air pressure, and then the machine is put into production normally. In this way, the production cost of the supplier and the user will not be increased, and normal production and timely delivery can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the web paper core tube repairing device for the high-speed automatic gravure printing machine;

[0028] Figure 2AIt is a schematic diagram of the structure of a 3-inch paper core tube repair device;

[0029] Figure 2B It is a side view of a 3-inch paper core tube repair device;

[0030] Figure 3A It is a schematic diagram of the structure of a 6-inch paper core tube repair device;

[0031] Figure 3B It is a side view of a 6-inch paper core tube repair device;

[0032] Figure 4A It is a schematic diagram of the structure of a 12-inch paper core tube repair device;

[0033] Figure 4B It is a side view of a 12-inch paper core tube repair device;

[0034] Figure 5A is a schematic diagram of the screw structure;

[0035] Figure 5B It is a schematic diagram of the side of the screw;

[0036] Fig. 6A It is a schematic diagram of the nut structure;

[0037] Figure 6B It is a schematic diagram of the side of the nut;

[0038] Figure 7 It is a schematic diagram of the support frame structure.

[0039] Figure 8 This is a schematic diagram of the 3-inch paper core tube deformation repair work;

[0040] Fig. 9 This is a schematic diagram of the 6-inch paper core tube deformation repair work. DETAILED DESCRIPTION

[0041] Because the paper core tubes for roll paper have three specifications: 3 inches, 6 inches, and 12 inches, the corresponding paper core tube repair device for roll paper for automatic gravure printing machine of the present invention (hereinafter referred to as paper core tube repair device) also has three specifications: 3 inches, 6 inches, and 12 inches. According to the specifications of the paper core tube for roll paper, a paper core tube repair device with a cylindrical shape at one end and a conical shape at the other end is designed and manufactured. The cylindrical outer diameter of the 3-inch paper core tube repair device is 3 inches, and the outer diameter of the cone tip at the other end is 1.5 inches. The cylindrical outer diameter of the 6-inch paper core tube repair device is 6 inches, and the outer diameter of the cone tip at the other end is 3 inches. The cylindrical outer diameter of the 12-inch paper core tube repair device is 12 inches, and the outer diameter of the cone tip at the other end is 6 inches. When the paper core tube is severely deformed, it is necessary to combine paper core tube repair devices of different sizes. At this time, screws are passed through the screw holes to connect paper core tube repair devices of different sizes together. To ensure a smooth transition and not damage the paper core tube, the cylindrical surface size of the 3-inch paper core tube repair device is the same as the cone tip surface size of the 6-inch paper core tube repair device, and the cylindrical surface size of the 6-inch paper core tube repair device is the same as the cone tip surface size of the 12-inch paper core tube repair device.

[0042] If they are not used in combination, the cone tip size of the 6-inch paper core tube repair device and the cone tip size of the 12-inch paper core tube repair device need to be made into 1.5 inches. In this way, the volume of the paper core tube repair device will be very large and the weight will increase a lot, which will be inconvenient to use. Therefore, the paper core tube repair device is made according to the above dimensions.

[0043] Then make a screw rod of sufficient length, a steel washer and nut matching the screw rod, and a cylindrical steel sleeve and a round rubber pad with an outer diameter consistent with the paper core tube and an inner diameter of 3 inches, 6 inches, and 12 inches respectively. For the sake of convenience and safety, make a support frame. With the use of these devices, the deformed paper core tube of the web can be basically repaired to the original round paper core tube, so that the air shaft can smoothly pass through the paper core tube and be used normally on the machine. This will not increase the production costs of the supplier and the user, and can also ensure normal production and timely delivery.

[0044] like Figure 1 As shown, the web 1 used in the gravure printing machine has a deformed portion 3 on one side of the circumference of the paper roll, and the web paper core tube 2 in the middle of the web 1 is also deformed at the position corresponding to the deformed portion 3. Therefore, it needs to be repaired using a paper core tube repair device.

[0045] The roll paper core tube repair device for a high-speed automatic gravure printing machine comprises a first paper core tube repair device 13, a second paper core tube repair device 8 and a third paper core tube repair device 4 which are connected in sequence, wherein the first paper core tube repair device 13 is a 12-inch paper core tube repair device, the second paper core tube repair device 8 is a 6-inch paper core tube repair device, and the third paper core tube repair device 4 is a 3-inch paper core tube repair device.

[0046] like Figure 2A and Figure 2B As shown, the third paper core tube repair device 4 is divided from right to left into a third conical surface 6 and a third cylinder 5. The outer diameter of the third cylinder 5 is 3 inches, which is the same as the inner diameter of the 3-inch paper core tube, and is used to repair the deformed 3-inch paper core tube into a standard tube. The outer diameter of the cone tip of the third conical surface 6 is 1.5 inches, and is used to gradually restore the deformed paper core tube to its original shape. The circular surface of the third cylinder 5 is provided with a third threaded screw hole 7. There are three third screw holes 7 evenly distributed on the third cylinder 5, and they are used to connect and fix with the second paper core tube repair device 8.

[0047] like Figure 3A and Figure 3B As shown, the second paper core tube repair device 8 is divided from right to left into a second conical surface 9 and a second cylinder 10. The outer diameter of the second cylinder 10 is 6 inches, which is the same as the inner diameter of the 6-inch paper core tube, and is used to repair the deformed 6-inch paper core tube into a standard tube. The outer diameter of the cone tip of the second conical surface 9 is 3 inches, which is consistent with the outer diameter of the third cylinder 5 of the third paper core tube repair device 4. It is used for smooth transition when used in conjunction with the third paper core tube repair device 4, and gradually restores the deformed paper core tube to its original shape. The circular surface of the second cylinder 10 is provided with a second threaded screw hole 11. There are three second screw holes 11, which are evenly distributed on the second cylinder 10, and are used to connect and fix with the first paper core tube repair device 13.

[0048] The circular surface of the second cylinder 10 is also provided with a second through-screw hole 12 without threads, which is used to connect and fix with the third paper core tube repair device 4. The second through-screw hole 12 passes through the second cylinder 10 and the second conical surface 9, and is used to cooperate with the third screw hole 7 of the third paper core tube repair device 4. There are three of the second through-screw holes 12, which are evenly distributed on the second cylinder 10 and correspond to the positions of the third screw holes 7. It can be seen that the circumferential area of ​​the three second screw holes 11 is larger than the circumferential area of ​​the second through-screw hole 12.

[0049] like Figure 4A and Figure 4BAs shown, the first paper core tube repair device 13 is divided from right to left into a first conical surface 14 and a first cylinder 15. The outer diameter of the first cylinder 15 is 12 inches, which is the same as the inner diameter of the 12-inch paper core tube, and is used to repair the deformed 12-inch paper core tube into a standard tube. The outer diameter of the cone tip of the first conical surface 14 is 6 inches, which is consistent with the outer diameter of the second cylinder 10 of the second paper core tube repair device 8, and is used for smooth transition when used in conjunction with the second paper core tube repair device 8, and gradually restores the deformed paper core tube to its original shape.

[0050] A first non-threaded penetrating screw hole 16 is also provided on the circular surface of the first cylinder 15 for connecting and fixing with the second paper core tube repair device 8. The first penetrating screw hole 16 passes through the first cylinder 15 and the first conical surface 14, and is used for cooperation with the second screw hole 11 of the second paper core tube repair device 8. There are three of the first penetrating screw holes 16, which are evenly distributed on the first cylinder 15, and their positions correspond to those of the second screw holes 11.

[0051] Furthermore, the first paper core tube repair device 13, the second paper core tube repair device 8 and the third paper core tube repair device 4 are all hollow structures and are provided with through holes for passing the screw 21 described below. The first paper core tube repair device 13 is provided with a first through hole 28, the second paper core tube repair device 8 is provided with a second through hole 27, and the third paper core tube repair device 4 is provided with a first through hole 26.

[0052] The device for repairing the paper core tube of a roll paper for a high-speed automatic gravure printing machine also includes a rubber pad 17, a steel sleeve 18, a steel washer 19, a nut 20, a screw rod 21 used in conjunction with the nut, and a support frame 23.

[0053] The rubber pad 17 is soft and will not damage the end surface of the web close to the core. It has three specifications: 3 inches, 6 inches, and 12 inches, and is used with the corresponding 3-inch, 6-inch, and 12-inch web paper core tubes.

[0054] The steel sleeve 18 is used to ensure that the paper core tube repair device safely enters the steel sleeve 18 after coming out of the paper core tube 2 without accidentally falling. The steel sleeve 18 has three specifications: 3 inches, 6 inches, and 12 inches, and is used with the corresponding 3-inch, 6-inch, and 12-inch roll paper core tubes.

[0055] The inner diameter of the steel washer 19 is slightly larger than the screw 21, so that the screw 21 can pass normally, and is smaller than the outer diameter of the nut 20, so as to block the nut 20. The outer diameter has three specifications of 3 inches, 6 inches, and 12 inches, and is used with the corresponding 3-inch, 6-inch, and 12-inch paper core tubes of the web.

[0056] The nut 20 and the screw rod 21 used in conjunction with the nut are as follows: Fig. 6A and Figure 6B As shown, when working, the nut 20 rotates to make the screw 21 carry the paper core tube repair device into the paper core tube 2 of the roll paper, and the nut 20 is a regular hexagon; Figure 5A and Figure 5B As shown, the other end of the screw 21 is provided with a convex portion 22, and the screw 21 and the convex portion 22 are processed into one piece, and are used to drive the paper core tube repair device to move. The convex portion 22 is a regular hexagon, and the length of the opposite side is greater than the through hole diameter of the paper core tube repair device.

[0057] like Figure 7 As shown, the support frame 23 has four support angles 25 on its lower surface. The upper surface of the support frame 23 has an arc-shaped support pad 24, which is used to support the rubber pad 17, the steel sleeve 18, and the steel washer 19 to ensure the safety of the personnel and the device during work. The arc of the arc-shaped support pad 24 is consistent with the outer diameter of the steel sleeve 18, so three types of 3 inches, 6 inches, and 12 inches are provided accordingly. The bottom of the arc-shaped support pad 24 is fixed to the support frame 23 by bolts.

[0058] The following describes the method for using the paper core tube repair device provided by the present invention:

[0059] Method 1: 3-inch paper core tube repair

[0060] When the 3-inch paper roll core tube 2A is deformed and the air shaft cannot pass through, Figure 8 As shown, the components used include the third paper core tube repair device 4, the third rubber pad 17A, the third steel sleeve 18A, the third steel washer 19A and the third arc-shaped support pad 24A; the components used also include a nut 20, a screw rod 21 and a support frame 23. Among them, the third rubber pad 17A refers to a 3-inch rubber pad, the third steel sleeve 18A refers to a 3-inch steel sleeve; the third steel washer 19A refers to a 3-inch steel washer, and the third arc-shaped support pad 24A refers to an arc-shaped support pad whose arc matches the third steel sleeve 18A.

[0061] When repairing the 3-inch paper core tube, one end of the screw rod 21 passes through the third paper core tube repair device 4, the 3-inch web paper core tube 2A, the third rubber pad 17A, the third steel sleeve 18A, the third steel washer 19A and the nut 20 in sequence, and the lower ends of the third rubber pad 17A, the third steel sleeve 18A and the third steel washer 19A are supported by the third arc-shaped supporting pad 24A.

[0062] The repair includes the following steps:

[0063] S1: The nut 20 is rotated with a wrench. During the rotation, the third steel washer 19A, the third steel sleeve 18A, and the third rubber pad 17A gradually approach the end surface of the web 1A until they are pressed tightly.

[0064] S2: Continue to rotate the nut 20, the screw rod 21 will move axially, and the convex portion 22 at the other end of the screw rod 21 will gradually press the third paper core tube repairing device 4 into the 3-inch paper core tube 2A of the roll paper 1A;

[0065] S3: Continue to rotate the nut 20, and the third paper core tube repair device 4 gradually props up the deformed paper core tube 2A under the action of the third conical surface 6, until the entire third paper core tube repair device 4 completely enters the 3-inch paper core tube 2A and comes out from the other end; at this time, the third paper core tube repair device 4 is shaped by the third cylindrical surface 5, so that the deformed 3-inch paper core tube 2A is basically restored to the original round tube.

[0066] In this way, the 3-inch air-inflating shaft can smoothly pass through the 3-inch paper core tube. Under the action of air pressure, the roll paper is fixed on the air-inflating shaft and then put into production normally.

[0067] Method 2: 6-inch paper core tube repair

[0068] When the 6-inch paper roll core tube is severely deformed and the air shaft cannot pass through, Fig. 9 As shown, the components used include the second paper core tube repair device 8, the third paper core tube repair device 4, the second rubber pad 17B, the second steel sleeve 18B, the second steel washer 19B and the second arc-shaped support pad 24B; the components used also include a nut 20, a screw 21 and a support frame 23. Among them, the second rubber pad 17B refers to a 6-inch rubber pad, the second steel sleeve 18B refers to a 6-inch steel sleeve; the second steel washer 19B refers to a 6-inch steel washer, and the second arc-shaped support pad 24B refers to an arc-shaped support pad whose arc matches the second steel sleeve 18B.

[0069] When repairing a 6-inch paper core tube, first fix the second paper core tube repair device 8 with the third paper core tube repair device 4, and use a screw through the second through-screw hole 12 to screw into the corresponding third threaded hole 7 of the third paper core tube repair device 4, and then connect and fix the third paper core tube repair device 4 and the second paper core tube repair device 8. Then, one end of the screw rod 21 passes through the second paper core tube repair device 8, the third paper core tube repair device 4, the 6-inch web paper core tube 2B, the second rubber pad 17B, the second steel sleeve 18B, the second steel washer 19B and the nut 20 in sequence, and the lower ends of the second rubber pad 17B, the second steel sleeve 18B and the second steel washer 19B are supported by the second arc-shaped support pad 24B.

[0070] The repair includes the following steps:

[0071] S11: The nut 20 is rotated with a wrench. During the rotation, the second steel washer 19B, the second steel sleeve 18B, and the second rubber pad 17B gradually approach the end surface of the web 1B until they are pressed tightly.

[0072] S12: Continue to rotate the nut 20, the screw rod 21 will move axially, and the convex portion 22 at the other end of the screw rod 21 will gradually press the third paper core tube repairing device 4 and the second paper core tube repairing device 8 into the 6-inch paper core tube 2B of the roll paper 1B;

[0073] S13: Continue to rotate the nut 20, the third paper core tube repairing device 4 under the action of the third conical surface 6, and the second paper core tube repairing device 8 under the action of the second conical surface 9 gradually prop up the deformed paper core tube 2B until the entire second paper core tube repairing device 8 completely enters the 6-inch paper core tube 2B and comes out from the other end; at this time, the third paper core tube repairing device 4 under the shaping of the third cylindrical surface 5, and the second paper core tube repairing device 8 under the shaping of the second cylindrical surface 10, so that the deformed 6-inch paper core tube 2B is basically restored to the original round tube.

[0074] In this way, the 6-inch air-inflating shaft can smoothly pass through the 6-inch paper core tube. Under the action of air pressure, the roll paper is fixed on the air-inflating shaft and then put into production normally.

[0075] Method 3: 12-inch paper core tube repair

[0076] When the 12-inch paper roll core tube is severely deformed and the air shaft cannot pass through, Figure 1 As shown, the components used include the first paper core tube repair device 13, the second paper core tube repair device 8, the third paper core tube repair device 4, the rubber pad 17, the steel sleeve 18, the steel washer 19 and the arc-shaped support pad 24; the components used also include the nut 20, the screw 21 and the support frame 23. Among them, the rubber pad 17 refers to a 12-inch rubber pad, the steel sleeve 18 refers to a 12-inch steel sleeve; the steel washer 19 refers to a 12-inch steel washer, and the arc-shaped support pad 24 refers to an arc-shaped support pad whose arc matches the steel sleeve 18.

[0077] When repairing a 12-inch paper core tube, first fix the second paper core tube repair device 8 with the third paper core tube repair device 4, and screw through the second through screw hole 12 into the corresponding third threaded hole 7 of the third paper core tube repair device 4. After the third paper core tube repair device 4 and the second paper core tube repair device 8 are connected and fixed, the first paper core tube repair device 13 is screwed through the first through screw hole 16 into the second threaded hole 11 corresponding to the second paper core tube repair device 8, so that the third paper core tube repair device 4 is connected with the second paper core tube repair device 8 and the first paper core tube repair device 13.

[0078] Finally, one end of the screw rod 21 is passed through the first paper core tube repair device 13, the second paper core tube repair device 8, the third paper core tube repair device 4, the 12-inch web paper core tube 2, the rubber pad 17, the steel sleeve 18, the steel washer 19 and the nut 20 in sequence, and the lower ends of the rubber pad 17, the steel sleeve 18 and the steel washer 19 are supported by the arc-shaped supporting pad 24.

[0079] The repair includes the following steps:

[0080] S21: The nut 20 is rotated with a wrench. During the rotation, the steel washer 19, the steel sleeve 18, and the rubber pad 17 gradually approach the end surface of the web 1 until they are pressed tightly.

[0081] S22: Continue to rotate the nut 20, the screw rod 21 will move axially, and the convex portion 22 at the other end of the screw rod 21 will gradually press the third paper core tube repairing device 4, the second paper core tube repairing device 8 and the first paper core tube repairing device 13 into the 12-inch paper core tube 2 of the roll paper 1;

[0082] S23: Continue to rotate the nut 20, the third paper core tube repairing device 4 under the action of the third conical surface 6, the second paper core tube repairing device 8 under the action of the second conical surface 9, and the first paper core tube repairing device 13 under the action of the first conical surface 14 gradually prop up the deformed paper core tube 2 until the entire first paper core tube repairing device 13 completely enters the 12-inch paper core tube 2 and comes out from the other end; at this time, the third paper core tube repairing device 4 under the shaping of the third cylindrical surface 5, the second paper core tube repairing device 8 under the shaping of the second cylindrical surface 10, and the first paper core tube repairing device 13 under the action of the first cylindrical surface 15, so that the deformed 12-inch paper core tube 2 is basically restored to the original round tube.

[0083] In this way, the 12-inch air expansion shaft can smoothly pass through the 12-inch paper core tube. Under the action of air pressure, the web paper is fixed on the air expansion shaft and then put into production normally.

[0084] Method 4: When the deformation of the 6-inch or 12-inch paper core tube of the web is not very serious, but only slightly deformed, making it difficult for the air-expansion shaft to pass through the paper core tube, it is not necessary to combine the paper core tube repair devices and use the corresponding second paper core tube repair device 8 or the corresponding first paper core tube repair device 13 directly.

[0085] Practice has proved that the present invention can effectively repair the deformed paper core tube of the web used in the high-speed automatic gravure printing machine and then use it on the machine, which will not increase the production cost of the supplier and the user, and can also ensure normal production and timely delivery.

Claims

1. A device for repairing a web core tube for a high-speed automatic gravure printing machine, characterized in that: It includes paper core tube repair devices of different sizes, each of which includes a conical surface and a cylinder connected in sequence; for paper core tube repair devices of adjacent sizes, the cylinder of the small-sized paper core tube repair device can be fixedly connected to the conical surface of the large-sized paper core tube repair device, and the connection part has a smooth transition; the paper core tube repair devices of different sizes are all hollow structures and are provided with a through hole that can pass through the same screw; it also includes a rubber pad, a steel sleeve, a steel washer, a nut, a screw used in conjunction with the nut, and a support frame, the rubber pad, steel sleeve, and steel washer are all provided with different sizes corresponding to the paper core tube repair device, one end of the screw passes through the paper core tube repair device, the paper core tube of the roll paper to be repaired, the rubber pad, the steel sleeve, the steel washer and the nut in sequence, the lower ends of the rubber pad, the steel sleeve, and the steel washer are supported by the arc-shaped support pad of the support frame, and the other end of the screw is provided with a convex portion.

2. The device for repairing a web core tube for a high-speed automatic gravure printing machine according to claim 1, characterized in that: The paper core tube repair device includes a first paper core tube repair device, a second paper core tube repair device and a third paper core tube repair device; in the first paper core tube repair device, it is divided into a first conical surface and a first cylinder from right to left; in the second paper core tube repair device, it is divided into a second conical surface and a second cylinder from right to left, and in the third paper core tube repair device, it is divided into a third conical surface and a third cylinder from right to left.

3. The device for repairing a web core tube for a high-speed automatic gravure printing machine according to claim 2, characterized in that: In the third paper core tube repair device, the outer diameter of the third cylinder is 3 inches, the outer diameter of the cone tip of the third conical surface is 1.5 inches, and the circular surface of the third cylinder is evenly provided with third threaded screw holes.

4. The device for repairing a web core tube for a high-speed automatic gravure printing machine according to claim 2, characterized in that: In the second paper core tube repair device, the outer diameter of the second cylinder is 6 inches, the outer diameter of the cone tip of the second conical surface is 3 inches, and the circular surface of the second cylinder is evenly provided with second threaded screw holes; and second non-threaded penetrating screw holes are evenly provided. The second penetrating screw holes match the threaded third screw holes of the third paper core tube repair device and are fixed by screws.

5. The device for repairing a web paper core tube for a high-speed automatic gravure printing machine according to claim 2, characterized in that: In the first paper core tube repair device, the outer diameter of the first cylinder is 12 inches, the outer diameter of the cone tip of the first conical surface is 6 inches, and a first non-threaded penetrating screw hole is provided on the circular surface of the first cylinder, which is used to cooperate with the threaded second screw hole of the second paper core tube repair device and be fixed by screws.

6. The device for repairing a web core tube for a high-speed automatic gravure printing machine according to claim 1, characterized in that: The outer diameter of the cone tip of the conical surface of the large-sized paper core tube repair device is the same as the outer diameter of the cylinder of the adjacent large-sized paper core tube repair device.

7. A method for repairing a paper core of a roll paper for a high-speed automatic gravure printing machine. When repairing a 3-inch paper core tube, one end of the screw rod sequentially passes through a third paper core tube repair device, a 3-inch paper core tube, a third rubber pad, a third steel sleeve, a third steel washer and a nut. The lower ends of the third rubber pad, the third steel sleeve and the third steel washer are supported by a third arc-shaped support pad. The dimensions of the third rubber pad, the third steel sleeve, the third steel washer and the third arc-shaped support pad correspond to 3 inches; comprising the following steps: S1: Use a wrench to rotate the nut. During the rotation, the third steel washer, the third steel sleeve, and the third rubber pad gradually approach the end surface of the web until they are pressed tightly. S2: Continue to rotate the nut, the screw will move axially, and the convex part at the other end of the screw will gradually press the third paper core tube repair device into the 3-inch paper core tube of the roll paper; S3: Continue to rotate the nut, and the third paper core tube repairing device gradually props up the deformed paper core tube under the action of the third conical surface, until the entire third paper core tube repairing device completely enters the inch paper core tube and comes out from the other end; At this time, the third paper core tube repairing device restores the deformed inch paper core tube to the original round tube under the shaping of the third cylindrical surface.

8. According to the method for repairing a web core for a high-speed automatic gravure printing machine as described in claim 7, when repairing a 6-inch paper core tube, first fix the second paper core tube repair device and the third paper core tube repair device, and pass one end of the screw through the second paper core tube repair device, the third paper core tube repair device, the 6-inch web paper core tube, the second rubber pad, the second steel sleeve, the second steel washer and the nut in sequence, and the lower ends of the second rubber pad, the second steel sleeve and the second steel washer are supported by the second arc-shaped support pad, wherein, The size of the second rubber pad, the second steel sleeve, the second steel washer and the second arc-shaped support pad corresponds to 6 inches; comprising the following steps: S11: The nut is rotated with a wrench. During the rotation, the second steel washer, the second steel sleeve, and the second rubber pad gradually approach the end surface of the web until they are pressed tightly. S12: Continue to rotate the nut, the screw will move axially, and the convex part at the other end of the screw will gradually press the third paper core tube repairing device and the second paper core tube repairing device into the 6-inch paper core tube of the roll paper; S13: Continue to rotate the nut, the third paper core tube repairing device under the action of the third conical surface, and the second paper core tube repairing device under the action of the second conical surface gradually prop up the deformed paper core tube, until the entire second paper core tube repairing device completely enters the 6-inch paper core tube and comes out from the other end; At this time, the third paper core tube repairing device is under the shaping of the third cylindrical surface, and the second paper core tube repairing device is under the shaping of the second cylindrical surface, so that the deformed 6-inch paper core tube is restored to the original round tube.

9. According to the method for repairing a web core for a high-speed automatic gravure printing machine as described in claim 8, when repairing a 12-inch paper core tube, the first paper core tube repairing device, the second paper core tube repairing device and the third paper core tube repairing device are fixed, and one end of the screw rod is sequentially passed through the first paper core tube repairing device, the second paper core tube repairing device, the third paper core tube repairing device, the 12-inch web paper core tube, the first rubber pad, the first steel sleeve, the first steel washer and the first nut, and the lower ends of the first rubber pad, the first steel sleeve and the first steel washer are supported by the first arc-shaped support pad, wherein, The size of the first rubber pad, the first steel sleeve, the first steel washer and the first arc-shaped support pad corresponds to 12 inches; comprising the following steps: S21: Rotate the first nut with a wrench. During the rotation, the first steel washer, the first steel sleeve, and the first rubber pad gradually approach the end surface of the web until they are tightly pressed. S22: Continue to rotate the first nut, the screw moves axially, and the convex portion at the other end of the screw gradually presses the third paper core tube repairing device, the second paper core tube repairing device and the first paper core tube repairing device into the 12-inch paper core tube of the roll paper; S23: Continue to rotate the first nut, the third paper core tube repairing device under the action of the third conical surface, the second paper core tube repairing device under the action of the second conical surface, and the first paper core tube repairing device under the action of the first conical surface gradually prop up the deformed paper core tube, until the entire first paper core tube repairing device completely enters the 12-inch paper core tube and comes out from the other end; At this time, the third paper core tube repair device is shaped by the third cylindrical surface, the second paper core tube repair device is shaped by the second cylindrical surface, and the first paper core tube repair device is acted upon by the first cylindrical surface, so that the deformed 12-inch paper core tube is restored to its original round tube.

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