Large-specification paper angle bead production line and non-stop paper changing method

Abstract

The invention discloses a large-specification paper angle bead production line and a non-stop paper changing method.The production line comprises a conveying device, a gluing device, a compaction device and an angle folding device, a wide paper tape and a narrow paper tape are overlapped and bonded through a synthesis device, then the edge of the wide paper tape is turned over to the position above the narrow paper tape through the compaction device, and the wide paper tape and the narrow paper tape are folded through the angle folding device; pressing the upper and lower surfaces of the side edges of the wide paper tape and the narrow paper tape, and then completely attaching the edge of the wide paper tape to the narrow paper tape, so that the wide paper tape and the narrow paper tape form a strip-shaped paperboard; and finally, traction and corner folding are conducted on the strip-shaped paper tape through a third corner folding roller set, damping force is provided for the strip-shaped paper tape through a first corner folding roller set and a second corner folding roller set, corner folding transition is conducted on the strip-shaped paper tape, and the first corner folding roller set and the second corner folding roller set move synchronously with the strip-shaped paper board. And a second lower roller in the third angle folding roller group drags the wide paper tape, so that the deformation of the narrow paper tape positioned on the inner side of the paper angle bead is not interfered by the driven wheel, and the smooth forming of the large-specification paper angle bead is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of paper corner protector production, and specifically relates to a large-size paper corner protector production line and a method for changing paper without stopping the machine. Background Art

[0002] Paper corner protectors generally require multiple layers of paper to be glued together and folded and cut before they can be rolled into a round shape to wrap around the end face of a steel coil. Traditional paper corner protector production lines require a lot of manual operation and have technical problems such as low automation and complex equipment. Authorization announcement number CN208646166U discloses a steel coil paper corner protector production line, including a conveying device, a gluing device, a compacting device, a folding device, a cutting device and a cutting device. The conveying device is mainly used to flatten the paper tape rolled on the reel and convey it to the next process; the gluing device is used to coat the three layers of paper tape with special adhesive and bond them together to form a whole, and also includes gluing the wide paper tape for the edging to wrap the three layers of paper tape; the compacting device is used to compact the three layers of paper tape that have been coated with adhesive through a pressing plate. On the one hand, it has the effect of evenly coating the glue, and on the other hand, it can also pass through the two sides of the pressing plate. The baffle bends the bottom layer of wide paper tape for edge wrapping inward naturally; the folding device is used to bend the thick paper tape that has been glued and wrapped from the center line to make the paper tape into a long right-angle shape. The compacting roller before the upper and lower rollers also plays a further compacting role; the cutting device is used to cut and separate the formed long right-angle paper corner protectors according to the specified length; the paper corner protectors that have been cut into the same length are cut into triangular notches at equal distances on one side by the corner cutting device, so that they can be rolled into round finished paper corner protectors. The entire assembly line is arranged in a straight line in sequence and connected to each other through the transmission of paper tapes.

[0003] When a large-sized corner protector is needed, the inner cardboard at the folded corner of the corner protector is easily separated from the outer cardboard and bulges inside the corner protector due to the widening of the side edges of the corner protector. At the same time, the wide paper tape used for hemming is prone to form bubbles between the two when hemming the overlapping narrow paper tape sides, which leads to quality problems in the large-sized corner protectors. In addition, at present, the production line needs to be stopped when loading paper rolls, and the paper strips on all paper rolls must be glued and bonded on the production line before the production line can be restarted for production. This will result in a large number of defective products in the front half of the corner protector, resulting in waste of resources, reduced efficiency and increased production costs. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a large-size paper corner protector production line and a non-stop paper changing method, aiming to improve the production efficiency and production quality of large-size paper corner protectors.

[0005] A large-size paper corner protection production line comprises a conveying device, a gluing device, a compacting device and a corner folding device which are arranged in a straight line in sequence, a synthesis device for superimposing a wide paper tape and a narrow paper tape is arranged between the gluing device and the compacting device, the synthesis device comprises an extrusion gap, the gaps at each location of the extrusion gap are of the same size and are used to extrude the wide paper tape and the narrow paper tape passing through the gap; The compacting device includes a conveying platform, on which a first set of folding baffles, a holding assembly, a second set of folding baffles and a pressing roller are fixedly arranged in sequence along the conveying direction of the paper tape. The first set of folding baffles and the second set of folding baffles are used to guide the edge portions of both sides of the wide paper tape to just above the narrow paper tape, and the angle between the baffles in the first set of folding baffles and the conveying platform is greater than the angle between the baffles in the second set of folding baffles and the conveying platform; the holding assembly includes an inverted T-shaped roller and a pressing wheel, both of which are driven wheels. The inverted T-shaped rollers are respectively located on both sides of the paper tape being conveyed, wherein the transverse rollers of the two inverted T-shaped rollers are used to be supported on the bottom surface of the wide paper tape respectively, and the vertical rollers of the two inverted T-shaped rollers are used to clamp the two sides of the narrow paper tape via the wide paper tape, and the two pressing rollers are located at the transverse rollers and are used to press the side edges of the narrow paper tape via the wide paper tape, and the axial directions of the two pressing rollers are perpendicular to the conveying direction of the paper tape, and the pressing roller is used to roll the wide paper tape located above the narrow paper tape and make it adhere to the top surface of the narrow paper tape; The folding device includes a first folding roller group, a second folding roller group and several third folding roller groups which are arranged in sequence along the paper tape transmission direction. The first folding roller group includes a first upper roller and a first lower roller which are both driven wheels. The second folding roller group and the third folding roller group include a second upper roller and a second lower roller. A gap with an obtuse cross-section is formed between the first upper roller and the first lower roller, and a gap with a right cross-section is formed between the second upper roller and the second lower roller. The first upper roller in the third folding roller group is a driven wheel, and the second lower roller in the third folding roller group is a driving wheel and is used to drive the wide paper tape to move.

[0006] Furthermore, a cutting device and a transmission device for cutting the formed paper corner protectors are arranged at the rear position of the corner folding device.

[0007] Furthermore, the cross section of the outer circumferential surface of the pressure roller is an obtuse angle, and the obtuse angle is greater than the obtuse angle of the cross section of the outer circumferential surface of the first upper roller.

[0008] Furthermore, the second lower rollers in the third angle roller group all rotate synchronously.

[0009] Furthermore, the gap formed between the first upper roller and the first lower roller is used to completely accommodate the narrow paper tape and the wide paper tape, so that the narrow paper tape and the wide paper tape are evenly stressed.

[0010] Furthermore, the extrusion gap is formed by two fixed rollers arranged in parallel up and down, or by a fixed plate and a fixed roller arranged in parallel up and down.

[0011] Further: the single side width of the large-sized paper corner protector is 10cm~20cm.

[0012] A non-stop paper changing method for a large-size paper corner protection production line includes the large-size paper corner protection production line, wherein the wide paper tape and the narrow paper tape are collectively referred to as paper tapes, and the non-stop paper changing method includes the following steps: Step 1: During normal production, the paper tapes are respectively passed through the gluing gaps arranged in a vertical array in the gluing device, so that idle gluing gaps are reserved between adjacent paper tapes and above and below all paper tapes, and the length difference of the paper tapes in adjacent paper rolls is greater than the travel of the paper tapes from the conveying device to the synthesis device; Step 2: Install the new paper roll onto the conveying device, and pull the paper tape on the new paper roll into the synthesis device through the idle gluing gap in the gluing device; Step 3: Laminating the paper tape on the new paper roll with the paper tape in production; Step 4: Cut the paper tape on the paper roll to be replaced at the synthesis device, and remove the paper roll to be replaced and the corresponding paper tape from the conveying device and the gluing device; thus completing the paper replacement without stopping the machine.

[0013] Further, in step 3, the paper tape on the new paper roll is made to fit with the paper tape on the paper roll to be replaced.

[0014] The beneficial effects of the present invention are as follows: an independent synthesis device is arranged between the gluing device and the compacting device to achieve separate stacking and bonding of paper strips, thereby avoiding the influence of subsequent processes on the bonding effect, facilitating the forming of large-size paper corner protectors, and facilitating manual paper changing operations without stopping the machine, without affecting the subsequent processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a production line diagram of the present invention; Figure 2 It is a front view of the compacting device in the present invention; Figure 3 It is a schematic diagram of the top view of the compaction device in the present invention; Figure 4 It is a side view structural schematic diagram of the compacting device in the present invention; Figure 5 It is a schematic diagram of the top view of the corner bending device in the present invention; Figure 6 It is a schematic diagram of the matching structure of the first upper roller and the first lower roller in the present invention; Figure 7 It is a schematic diagram of the matching structure of the second upper roller and the second lower roller in the present invention; Figure 8It is a schematic diagram of the paper tape in the invention sequentially passing through the conveying device, the gluing device and the synthesizing device; Fig. 9 It is a schematic diagram of the structure of the extrusion gap in the present invention; Fig.10 It is a schematic diagram of the structure of the paper corner protector in the present invention. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with the accompanying drawings. The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention. The directional terms such as left, middle, right, top, and bottom in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0017] A large-size paper corner protection production line, such as Figure 1 As shown, it includes a conveying device 1, a gluing device 2, a compacting device 4 and a folding device 5 which are arranged in a straight line in sequence. A cutting device 6 and a conveying device 7 for cutting the formed paper corner protector are arranged at the rear position of the folding device 5; a synthesis device 3 for overlapping the wide paper tape and the narrow paper tape is arranged between the gluing device 2 and the compacting device 4. The synthesis device 3 includes an extrusion gap. The gaps at each location of the extrusion gap are of the same size and are used to extrude the wide paper tape and the narrow paper tape passing therethrough. Fig. 9 As shown, the extrusion gap is formed by two fixed rollers arranged in parallel up and down or by a fixed plate 31 and a fixed roller 32 arranged in parallel up and down, that is, the extrusion gap is formed between the two fixed rollers or between the fixed plate and the fixed roller; Combination Figures 2 to 4As shown, the compacting device 4 includes a conveying platform 41, on which a first group of folding baffles 42, a holding assembly 43, a second group of folding baffles 44 and a pressure roller 45 are fixedly arranged in sequence along the conveying direction of the paper tape. The first group of folding baffles 42 and the second group of folding baffles 44 are both used to guide the edge portions of both sides of the wide paper tape to just above the narrow paper tape, and the angle between the baffles in the first group of folding baffles 42 and the conveying platform 41 is greater than the angle between the baffles in the second group of folding baffles 44 and the conveying platform 42; the holding assembly 43 includes an inverted T-shaped roller 432 and a pressure roller 431, both of which are driven wheels, and the two inverted T-shaped rollers 432 are respectively located on both sides of the conveyed paper tape, and the lateral roller 431 of the two inverted T-shaped rollers 432 is 22 are used to be supported on the bottom surface of the wide paper tape respectively, the vertical roller 4321 of the two inverted T-shaped rollers 432 is used to clamp the two sides of the narrow paper tape across the wide paper tape, the two pressing wheels 431 are located at the horizontal roller 4322 and are used to press the side edges of the narrow paper tape across the wide paper tape, the axial directions of the two pressing wheels 431 are perpendicular to the conveying direction of the paper tape, and the pressing roller 45 is used to roll the wide paper tape located above the narrow paper tape and make it adhere to the top surface of the narrow paper tape; the wide paper tape and the narrow paper tape at the upper and lower sides of the edge of the narrow paper tape are compacted by the inverted T-shaped roller 432 and the pressing wheel 431, and when the inner and outer paper tapes of the paper corner protector are stretched and relatively displaced, it is ensured that the edge of the wide paper tape can be stably adhered to the upper surface of the narrow paper tape; Combination Figures 5 to 7 As shown, the folding device 5 includes a first folding roller group 51, a second folding roller group 52 and a plurality of third folding roller groups 53 which are sequentially arranged along the paper tape conveying direction. The first folding roller group 41 includes a first upper roller 511 and a first lower roller 512 which are both driven wheels. The second folding roller group 52 and the third folding roller group 53 each include a second upper roller 521 and a second lower roller 522. A gap with an obtuse cross-section is formed between the first upper roller 511 and the first lower roller 512. The gap formed between the first upper roller 511 and the first lower roller 512 is used to completely accommodate Narrow paper tape and wide paper tape are placed so that the narrow paper tape and the wide paper tape are evenly stressed. In addition, the cross-section of the outer circumference of the pressure roller 45 is an obtuse angle, and the obtuse angle is greater than the obtuse angle of the cross-section of the outer circumference of the first upper roller 511; a gap with a right angle cross-section is formed between the second upper roller 521 and the second lower roller 522, the second upper roller 521 in the third angled roller group 53 is a driven wheel, the second lower roller 522 in the third angled roller group 53 is a driving wheel and is used to drive the wide paper tape to move, and the second lower roller 522 in the third angled roller group 53 rotates synchronously and is driven by the same drive motor.

[0018] Among them, combined Fig. 9 and Fig.10As shown, the wide paper tape 102 and the narrow paper tape 101 are first overlapped and bonded by the combining device 3, and then the edge of the wide paper tape 102 is folded over the narrow paper tape 101 by the compacting device 4, and the upper and lower surfaces of the side edges of the wide paper tape 102 and the narrow paper tape 101 are pressed together, and then the edge of the wide paper tape 102 is completely attached to the narrow paper tape 101, so that the wide paper tape 102 and the narrow paper tape 101 form a strip paperboard 100; finally, the third folding roller group 53 is used to pull and fold the strip paper tape 100, and the first folding roller group 51 and the second folding roller group 52 are used to provide damping force to the strip paper tape 100 and perform folding transition, and at the same time, the first folding roller group 53 is used to pull and fold the strip paper tape 100. The roller group 51 and the second folding roller group 52 move synchronously with the strip paperboard 100, and gradually stretch, compact and deform the strip paperboard 100. The first folding roller group 51 and the second folding roller group 52, both of which are driven, facilitate deformation of the inner and outer sides of the strip paperboard 100 between the rollers to avoid deformity when the strip paperboard 100 is folded. At the same time, the wide paper tape 102 is pulled by the second lower roller 522 in the third folding roller group 53, so that the deformation of the narrow paper tape 101 located on the inner side of the paper corner guard is not interfered by the driven wheel (the second upper roller 521), thereby ensuring the smooth forming of the large-sized paper corner guard. The single-side width of the large-sized paper corner guard is 10cm~20cm.

[0019] A non-stop paper changing method for a large-size paper corner protection production line includes a large-size paper corner protection production line, wherein a wide paper tape 102 and a narrow paper tape 101 are collectively referred to as paper tapes, and the non-stop paper changing method includes the following steps: Step 1: During normal production, the paper tapes are respectively passed through the gluing gaps arranged in a vertical array in the gluing device 2. After the paper tapes pass through the gluing gaps, a layer of glue is applied to the upper and lower surfaces of the paper tapes, so that idle gluing gaps are reserved between adjacent paper tapes and above and below all paper tapes, and the length difference of the paper tapes in adjacent paper rolls is greater than the travel of the paper tapes from the conveying device 1 to the synthesizing device 3; Step 2: Install the new paper roll onto the conveying device 1, and pull the paper tape on the new paper roll into the synthesis device 3 through the idle gluing gap in the gluing device 2; Step 3: Press the paper tape on the new paper roll with the paper tape in production, so that the paper tape on the new paper roll fits with the paper tape on the paper roll to be replaced, so as to replace the paper tape in production at the corresponding position, thereby reducing the impact of replacing the paper tape on the stress state of various parts in the production line; Step 4: Cut the paper tape on the paper roll to be replaced at the synthesis device 3, and remove the paper roll to be replaced and the corresponding paper tape from the conveying device 1 and the gluing device 2; thereby completing the paper replacement without stopping the machine; furthermore, waste is only generated between the insertion point of the newly added paper tape and the cutting point of the cut paper tape, thereby reducing the waste of paper tape and avoiding shutdowns that affect production efficiency.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-size paper corner protection production line, comprising a conveying device, a gluing device, a compacting device and a corner folding device arranged in a straight line, characterized in that: A synthesis device for superimposing the wide paper tape and the narrow paper tape is arranged between the glue coating device and the compacting device, and the synthesis device comprises an extrusion gap, the gaps at each location of the extrusion gap are of the same size and are used to extrude the wide paper tape and the narrow paper tape passing through the gap; The compacting device includes a conveying platform, on which a first set of folding baffles, a holding assembly, a second set of folding baffles and a pressing roller are fixedly arranged in sequence along the conveying direction of the paper tape. The first set of folding baffles and the second set of folding baffles are used to guide the edge portions of both sides of the wide paper tape to just above the narrow paper tape, and the angle between the baffles in the first set of folding baffles and the conveying platform is greater than the angle between the baffles in the second set of folding baffles and the conveying platform; the holding assembly includes an inverted T-shaped roller and a pressing wheel, both of which are driven wheels. The inverted T-shaped rollers are respectively located on both sides of the paper tape being conveyed, the transverse rollers of the two inverted T-shaped rollers are used to be supported on the bottom surface of the wide paper tape respectively, the vertical rollers of the two inverted T-shaped rollers are used to clamp the two sides of the narrow paper tape via the wide paper tape, the two pressing rollers are located at the transverse rollers and are used to press the side edges of the narrow paper tape via the wide paper tape, the axial directions of the two pressing rollers are perpendicular to the conveying direction of the paper tape, and the pressing rollers are used to roll the wide paper tape located above the narrow paper tape and make it adhere to the top surface of the narrow paper tape; The folding device includes a first folding roller group, a second folding roller group and several third folding roller groups which are arranged in sequence along the paper tape transmission direction. The first folding roller group includes a first upper roller and a first lower roller which are both driven wheels. The second folding roller group and the third folding roller group include a second upper roller and a second lower roller. A gap with an obtuse cross-section is formed between the first upper roller and the first lower roller, and a gap with a right cross-section is formed between the second upper roller and the second lower roller. The first upper roller in the third folding roller group is a driven wheel, and the second lower roller in the third folding roller group is a driving wheel and is used to drive the wide paper tape to move.

2. The large-size paper corner protection production line according to claim 1 is characterized by: A cutting device and a transmission device for cutting the formed paper corner protectors are arranged at the rear position of the corner folding device.

3. The large-size paper corner protection production line according to claim 1 is characterized in that: The cross section of the outer circumferential surface of the pressure roller is an obtuse angle, and the obtuse angle is greater than the obtuse angle of the cross section of the outer circumferential surface of the first upper roller.

4. The large-size paper corner protection production line according to claim 1 is characterized in that: The second lower rollers in the third angle roller group all rotate synchronously.

5. The large-size paper corner protection production line according to claim 1 is characterized by: The gap formed between the first upper roller and the first lower roller is used to completely accommodate the narrow paper tape and the wide paper tape.

6. The large-size paper corner protection production line according to claim 1 is characterized by: The extrusion gap is formed by two fixed rollers arranged side by side up and down, or by a fixed plate and a fixed roller arranged side by side up and down.

7. The large-size paper corner protection production line according to claim 1 is characterized by: The single side width of large-size paper corner protectors is 10cm~20cm.

8. A method for changing paper without stopping the production line of large-size paper corner protectors, characterized in that: The large-size paper corner protection production line according to claim 1 is included, the wide paper tape and the narrow paper tape are collectively referred to as paper tapes, and the method for changing paper without stopping the machine includes the following steps: Step 1: During normal production, the paper tapes are respectively passed through the gluing gaps arranged in a vertical array in the gluing device, so that idle gluing gaps are reserved between adjacent paper tapes and above and below all paper tapes, and the length difference of the paper tapes in adjacent paper rolls is greater than the travel of the paper tapes from the conveying device to the synthesis device; Step 2: Install the new paper roll onto the conveying device, and pull the paper tape on the new paper roll into the synthesis device through the idle gluing gap in the gluing device; Step 3: Laminating the paper tape on the new paper roll with the paper tape in production; Step 4: Cut the paper tape on the paper roll to be replaced at the synthesis device, and remove the paper roll to be replaced and the corresponding paper tape from the conveying device and the gluing device; thus completing the paper replacement without stopping the machine.

9. The method for changing paper without stopping the large-size paper corner protection production line according to claim 8, characterized in that: In step 3, the paper tape on the new paper roll is made to fit with the paper tape on the paper roll to be replaced.

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