Carton paperboard anti-collapse indentation device based on gradient elastic ejector block

Abstract

The invention relates to the technical field of carton production and processing, and discloses a carton paperboard anti-collapse indentation device based on gradient elastic ejector blocks, which comprises a rack with a receiving plate on the right side, a plurality of transmission shafts which are uniformly distributed in a rectangular shape are rotatably and penetratingly mounted on the inner walls of the front end and the rear end of the rack, and a plurality of matched chutes are preset in the outer walls of the transmission shafts; the front ends and the rear ends of the corresponding left and right transmission shafts are rotationally sleeved with sleeve plates, and the outer walls of the upper and lower transmission shafts located on the left side are symmetrically and slidably sleeved with pressing rollers in the front-back direction. The carton paperboard anti-collapse indentation device based on the gradient elastic ejector blocks can effectively solve the problems that in the prior art, the ejector blocks with too high hardness apply uniform and too large supporting force to the whole paperboard area, and the ejector blocks with too low hardness provide insufficient supporting force; and in order to obtain a barely acceptable indentation effect, the indentation pressure needs to be adjusted extremely accurately, and the error-tolerant rate is low.

Description

Technical Field

[0001] The present invention relates to the technical field of carton production and processing, and in particular to a carton paperboard anti-collapse and indentation device based on a gradient elastic top block. Background Art

[0002] As the core base material in the packaging field, carton board is widely used in fields such as electronic products, high-end gift boxes and precision medical devices, which have extremely strict requirements on surface flatness. The indentation process is a key step in carton forming, and its quality directly determines the edge stiffness and overall anti-collapse performance of the final box. Practice has shown that the collapse caused by excessive indentation of the indentation line will significantly weaken the compressive strength of the box and cause irreversible deformation of the surface printed pattern, seriously affecting the product quality and performance. Existing indentation technologies are mainly divided into two categories: rigid indentation roller pressure forces forming through the convex and concave structure of the upper and lower rollers, which can easily lead to cardboard fiber breakage; elastic top block assisted die cutting sets a homogeneous polyurethane / rubber top block under the die to provide cushioning. Although it reduces the fiber damage rate, it cannot solve the problem of micro-scale collapse of thin white paper.

[0003] In this regard, the present application designs a carton cardboard anti-collapse indentation device based on a gradient elastic top block. The top blocks in existing cardboard creasing machines are mostly made of hard materials or homogeneous elastomers. Top blocks with too high hardness exert uniform and excessive support force on the entire cardboard area, which will cause the area near the cardboard indentation line to be over-compressed and the core layer to collapse, resulting in obvious collapse, which seriously weakens the strength of the paper box. Top blocks with too low hardness provide insufficient support force, and lack sufficient reaction force under the cardboard to form a clear, full, and deep indentation line, resulting in subsequent folding difficulties, inaccuracies, line bursts, or rebound after folding; in addition, in order to obtain a barely acceptable indentation effect, a single hardness top block needs to adjust the indentation pressure extremely accurately, and the fault tolerance rate is low. Slight vibration of the machine or slight fluctuation in cardboard thickness will cause batch collapse or poor indentation. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a carton paperboard anti-collapse indentation device based on a gradient elastic top block, which can effectively solve the problem in the prior art that a top block with too high a hardness exerts a uniform and excessive supporting force on the entire paperboard area, causing the area near the paperboard indentation line to be over-compressed and the core layer to collapse, forming an obvious collapse phenomenon; a top block with too low a hardness provides insufficient supporting force, and there is a lack of sufficient reaction force under the paperboard to form a clear, full, and deep indentation line; in addition, a single hardness top block needs to adjust the indentation pressure extremely precisely to obtain a barely acceptable indentation effect, and the fault tolerance rate is low.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a carton paperboard anti-collapse indentation device based on a gradient elastic top block, comprising: The right side of the frame has a material receiving plate, and multiple rectangular evenly distributed transmission shafts are installed on the inner walls of the front and rear ends of the frame for common rotation. Multiple matching slide grooves are preset on the outer walls of the transmission shafts. The front and rear ends of each corresponding left and right transmission shafts are both sleeved with sleeve plates for common rotation. The outer walls of the upper and lower transmission shafts on the left are both symmetrically slidably sleeved with pressure rollers, and the front and rear ends of the pressure rollers are both installed with conveying rollers that are also slidably sleeved on the pressure rollers. The frame is provided with an adjustment part, and the multiple pressure rollers are jointly provided with an indentation part; The adjustment part includes a bidirectional lead screw installed on the inner walls of the front and rear ends of the frame, which rotates through the frame. A connecting plate is provided on the outer walls of the left and right transmission shafts on the upper side, and a plurality of adjustment plates are provided on the outer walls of the left and right transmission shafts on the lower side. Extension plates are installed on the opposite ends of the front and rear adjustment plates on the lower side. Among them, the indentation part includes a pre-pressing ring knife fixedly mounted on the outer walls of multiple pressure rollers on the left side, a pre-pressing group is provided on multiple pressure rollers on the left side, a main pressing ring knife is fixedly mounted on the outer walls of the two pressure rollers on the upper right side, and a main pressing group is provided on the two pressure rollers on the lower right side.

[0006] Furthermore, the pre-stressing group includes elastic bushings arranged on both the front and rear sides of the pre-stressing ring knife, the elastic bushings on both the front and rear sides are fixedly mounted on the pressure roller, and a pressure relief groove is provided on the outer wall of the pressure roller corresponding to the two front and rear elastic bushings.

[0007] Furthermore, the main pressing group includes a hard bushing fixedly mounted on the outer wall of the pressure roller, and a plurality of groups of dense small protrusions evenly distributed circumferentially are provided on the outer wall of the hard bushing. Flexible bushings are fixedly mounted on the outer wall of the pressure roller on both the front and rear sides of the hard bushing, and a plurality of groups of sparse large protrusions evenly distributed circumferentially are provided on the outer wall of the flexible bushing. A second pressure relief groove is provided on the outer wall of the pressure roller corresponding to the front and rear flexible bushings, and a plurality of magnetic slides evenly distributed circumferentially are slidably installed on the inner wall of the second pressure relief groove through compression springs, and the multiple magnetic slides on the front and rear sides are symmetrically arranged.

[0008] Furthermore, the opposite ends of the front and rear connecting plates are respectively rotatably connected to the corresponding conveying rollers, and connecting slide rods are symmetrically installed on the upper ends of the connecting plates. A support plate is provided on the upper side of the connecting plate and is threadedly mounted on the bidirectional screw. The left and right connecting slide rods both slide through the support plate.

[0009] Furthermore, multiple adjustment plates are rotatably connected to the corresponding conveying rollers, and the opposite ends of the frontmost and rearmost adjustment plates corresponding to the right conveying rollers are installed with docking slides. Strong magnets are embedded on the lower sides of the opposite ends of the front and rear docking slides, and an annular groove is opened on one end of the conveying roller corresponding to the adjustment plate on the lower right side facing the docking slide, and the docking slide is slidably connected to the inner wall of the corresponding annular groove.

[0010] Furthermore, avoidance grooves are provided on the inner walls at both ends of the frame, a baffle is installed on the end of the extension plate facing the avoidance groove, a mounting groove is provided on the upper end of the baffle, an auxiliary pressure plate is slidably connected to the inner wall of the mounting groove through a compression spring, sliding holes are symmetrically provided on the upper end of the baffle, a supporting slide bar is slidably installed in the sliding hole, the lower end of which is connected to the baffle through a compression spring, a positioning plate is commonly installed on the upper ends of the left and right supporting slide bars, and a cover plate is installed on the end of the positioning plate facing the corresponding adjustment plate.

[0011] Furthermore, each upper and lower sleeve plates are commonly provided with an adjusting screw fixedly connected to the frame through a bearing seat, the upper side of the adjusting screw is threadedly connected to the sleeve plate, and the lower side of the adjusting screw rotates and passes through the lower sleeve plate.

[0012] Furthermore, waist-shaped sliding holes are opened on the inner walls at the front and rear ends of the frame, corresponding to the left and right transmission shafts on the upper side. The front and rear ends of the left and right transmission shafts on the upper side are respectively slidably connected to the inner walls of the corresponding waist-shaped sliding holes, and the rear ends of the left and right transmission shafts on the upper and lower sides are connected by synchronous belts.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a carton paperboard anti-collapse indentation device based on a gradient elastic top block. When the paperboard is pre-indented, the paperboard indentation line will be deformed and collapsed after being subjected to force, and at the same time, the corresponding left and right elastic bushings will be squeezed so that the corresponding partial areas are elastically compensated and sink into the corresponding pressure relief grooves, thereby achieving the effect of pressure relief compensation for the left and right areas of the paperboard indentation line. It can also avoid the problem that a single top block with too high hardness applies a uniform and excessive supporting force to the entire paperboard area, resulting in partial areas on the left and right sides of the paperboard indentation line being over-compressed and the core layer being crushed, forming an obvious collapse phenomenon, and seriously weakening the strength of the paper box.

[0014] When the cardboard is subjected to the main indentation, the indentation line of the cardboard will deform and collapse under the force, and the corresponding left and right flexible bushings will be squeezed at the same time, so that the corresponding parts of the area are elastically compensated and fall into the corresponding pressure relief groove 2, thereby achieving the effect of pressure relief compensation on the left and right areas of the cardboard indentation line. It can also avoid the top block with too low hardness providing insufficient support force, lack of sufficient reaction force under the cardboard to form a clear, full, and deep indentation line, resulting in subsequent folding difficulties, inaccuracies, broken lines or rebound after folding.

[0015] When adjusting the left and right spacing of the pressing rollers, the external drive controls the positive and negative rotation of the upper and lower bidirectional screws respectively, driving the corresponding connecting plates to move closer to or away from each other, and the front and rear connecting plates will respectively drive the corresponding pressing rollers to move closer to or away from each other through the corresponding conveying rollers, thereby conveniently achieving the effect of precisely adjusting the left and right spacing of the pressing rollers through the two-way screws; and when adjusting the upper and lower spacing of the pressing rollers, the external drive controls the positive and negative rotation of the front and rear adjustment screws respectively, driving the upper left and right transmission shafts to slide upward or downward along the waist-shaped sliding holes, thereby conveniently achieving the effect of precisely adjusting the upper and lower spacing of the pressing rollers through the adjustment screws. Combined with the flexible compensation of the elastic bushing and the hard bushing, it can avoid the problem that a single hardness top block is used to obtain a barely acceptable indentation effect, the spacing adjustment fault tolerance is low, and slight vibration of the machine or slight fluctuation in cardboard thickness will lead to batch collapse or poor indentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0017] Figure 1 Schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the adjusting portion and the indentation portion in an embodiment of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the sleeve plate, the adjusting screw and the indentation part in the embodiment of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the adjustment part in an embodiment of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the transmission shaft, sleeve plate, baffle plate and positioning plate in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure in which the adjustment part is three-dimensionally separated in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure in which the transmission shaft, pre-pressing ring cutter and pre-pressing group are three-dimensionally separated in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure in which the transmission shaft, the main pressure ring cutter and the main pressure group are three-dimensionally separated in an embodiment of the present invention; Figure 9 It is a structural schematic diagram of a three-dimensional partial cross-section of the main pressure ring cutter and the main pressure group in an embodiment of the present invention.

[0018] : The numbers in the figure represent: 1. Frame; 2. Material receiving plate; 3. Transmission shaft; 4. Sleeve plate; 41. Adjusting screw; 5. Pressure roller; 6. Conveyor roller; 7. Adjusting part; 71. Bidirectional screw; 72. Connecting plate; 721. Connecting slide bar; 722. Support plate; 73. Adjusting plate; 731. Docking slide bar; 732. Strong magnet; 74. Extension plate; 741. Baffle; 742. Auxiliary pressure plate; 743. Support slide bar; 744. Positioning plate; 745. Cover plate; 8. Indentation part; 81. Pre-pressing ring knife; 82. Pre-pressing group; 821. Elastic bushing; 822. Pressure relief groove one; 83. Main pressure ring knife; 84. Main pressure group; 841. Hard bushing; 842. Flexible bushing; 843. Pressure relief groove two; 844. Magnetic slide bar. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Example:

[0022] See also Figures 1-9 The present invention provides a technical solution: a cardboard box board anti-collapse indentation device based on a gradient elastic top block, comprising: On the right side is a frame 1 with a material receiving plate 2. A plurality of rectangular evenly distributed transmission shafts 3 are installed on the inner walls of the front and rear ends of the frame 1 so as to rotate together. A plurality of matching slide grooves are preset on the outer walls of the transmission shafts 3. The front and rear ends of each corresponding left and right transmission shafts 3 are both rotated together and sleeved with sleeve plates 4. The outer walls of the upper and lower transmission shafts 3 on the left side are both symmetrically slidably sleeved with pressure rollers 5. The front and rear ends of the pressure rollers 5 are both installed with conveying rollers 6 that are also slidably sleeved on the pressure rollers 5. An adjusting part 7 is provided on the frame 1, and an indentation part 8 is commonly provided on the multiple pressure rollers 5. Among them, the adjustment part 7 includes a bidirectional screw 71 that is installed on the inner walls of the front and rear ends of the frame 1 and rotates through them together. The front and rear threaded sections of the bidirectional screw 71 rotate in opposite directions. A connecting plate 72 is provided on the outer walls of the left and right transmission shafts 3 on the upper side and a plurality of adjustment plates 73 are provided on the outer walls of the left and right transmission shafts 3 on the lower side. Extension plates 74 are installed on the opposite ends of the front and rear adjustment plates 73 on the lower side. The adjustment plate 73 and the extension plate 74 are integrated into one design. Among them, the indentation part 8 includes a pre-pressing ring knife 81 fixedly mounted on the outer walls of multiple pressing rollers 5 on the left side, a pre-pressing group 82 is provided on multiple pressing rollers 5 on the left side, a main pressing ring knife 83 is fixedly mounted on the outer walls of the two pressing rollers 5 on the upper right side, and a main pressing group 84 is provided on the two pressing rollers 5 on the lower right side.

[0023] The pre-pressing group 82 includes elastic bushings 821 arranged on the front and rear sides of the pre-pressing ring knife 81. The elastic bushings 821 on the front and rear sides are fixedly mounted on the pressure roller 5. A pressure relief groove 822 is provided on the outer wall of the pressure roller 5 corresponding to the front and rear elastic bushings 821. The pressure relief groove 822 is designed to be arc-shaped.

[0024] The main pressing group 84 includes a hard bushing 841 fixedly mounted on the outer wall of the pressing roller 5, and a plurality of groups of dense small protrusions evenly distributed circumferentially are arranged on the outer wall of the hard bushing 841. A flexible bushing 842 is fixedly mounted on the outer wall of the pressing roller 5 on both the front and rear sides of the hard bushing 841, and a plurality of groups of sparse large protrusions evenly distributed circumferentially are arranged on the outer wall of the flexible bushing 842. A second pressure relief groove 843 is provided on the outer wall of the pressing roller 5 corresponding to the front and rear flexible bushings 842. The second pressure relief groove 843 is annular in design, and a plurality of magnetic slides 844 evenly distributed circumferentially are slidably installed on the inner wall of the pressure relief groove 843 through compression springs. The multiple magnetic slides 844 on the front and rear sides are symmetrically arranged.

[0025] The opposite ends of the front and rear connecting plates 72 are respectively rotatably connected to the corresponding conveying rollers 6. The upper end of the connecting plate 72 is symmetrically installed with connecting slide rods 721. The upper side of the connecting plate 72 is provided with a support plate 722 which is threadedly mounted on the bidirectional screw 71. The left and right connecting slide rods 721 both slide through the support plate 722.

[0026] Multiple adjustment plates 73 are rotatably connected to the corresponding conveying rollers 6, and the opposite ends of the frontmost and rearmost adjustment plates 73 corresponding to the right conveying roller 6 are installed with docking slides 731. Strong magnets 732 are embedded on the lower sides of the opposite ends of the front and rear docking slides 731, and an annular groove is opened on the end of the conveying roller 6 corresponding to the adjustment plate 73 on the lower right side facing the docking slide 731, and the docking slide 731 is slidably connected to the inner wall of the corresponding annular groove.

[0027] Avoidance grooves are provided on the inner walls at both ends of the front and rear ends of the frame 1. A baffle 741 is installed on the end of the extension plate 74 facing the avoidance groove. A mounting groove is provided on the upper end of the baffle 741. An auxiliary pressure plate 742 is slidably connected to the inner wall of the mounting groove through a compression spring. Sliding holes are symmetrically provided on the upper end of the baffle 741. A supporting slide bar 743 is slidably installed in the sliding hole, and the lower end is connected to the baffle 741 through a compression spring. A positioning plate 744 is installed on the upper ends of the left and right supporting slide bars 743. A cover plate 745 is installed on the end of the positioning plate 744 facing the corresponding adjustment plate 73.

[0028] Each upper and lower sleeve plates 4 are commonly provided with an adjusting screw 41 fixedly connected to the frame 1 through a bearing seat. The upper side of the adjusting screw 41 is threadedly connected to the sleeve plate 4, and the lower side of the adjusting screw 41 rotates and passes through the lower sleeve plate 4.

[0029] Waist-shaped sliding holes are opened on the inner walls at the front and rear ends of the frame 1 corresponding to the left and right transmission shafts 3 on the upper side. The front and rear ends of the left and right transmission shafts 3 on the upper side are respectively slidably connected to the inner walls of the corresponding waist-shaped sliding holes, and the rear ends of the left and right transmission shafts 3 on the upper and lower sides are connected by synchronous belts.

[0030] When implementing: First, the adjustment part 7 and the indentation part 8 in the present application cooperate to accurately adjust the horizontal and vertical spacing of the multiple pressing rollers 5 on the upper and lower sides when indenting the cardboard, effectively increasing the indentation tolerance rate, and performing pre-indentation and main indentation on the cardboard in turn. During this period, the elastic sleeve 821 and the flexible sleeve 842 can both provide pressure relief protection for the cardboard to avoid excessive compression of the area near the indentation line of the cardboard, crushing of the core layer, forming obvious collapse, seriously weakening the strength of the paper box, and lack of sufficient reaction force under the cardboard to form a clear, full, and deep indentation line.

[0031] It should be noted that, under the action of the compression spring, the positioning plate 744 will always drive the cover plate 745 to move upward until the inner walls of the two semicircular gaps at the upper end of the positioning plate 744 are in contact with the outer walls of the upper left and right transmission shafts 3. Similarly, under the action of the compression spring, the auxiliary pressure plate 742 initially extends out of the mounting groove and approaches the cover plate 745, and the multiple magnetic slides 844 on the left and right sides of the same pressure roller 5 will also approach each other under the action of the compression spring. At this time, the corresponding flexible bushing 842 is in a flat state.

[0032] When pre-indenting the cardboard, it should be noted that the main purpose of pre-indenting is to lay the foundation for the precise positioning of the subsequent main indentation. The pressure of the pre-indentation is usually smaller than the pressure of the main indentation. When the cardboard passes through the multiple pre-indenting ring knives 81 on the upper and lower sides, the multiple pre-indenting ring knives 81 on the upper and lower sides will pre-indent the cardboard. During the pre-indentation, the cardboard is squeezed together by the upper and lower rigid pre-indenting ring knives 81. The areas of the cardboard on the left and right sides of the indentation line will be subjected to greater squeezing pressure, which will cause problems such as deformation and collapse due to stress. The corresponding areas of the left and right elastic bushings 821 on the pressing roller 5 will be respectively aligned with the pressure roller 5. The left and right areas of the cardboard indentation line correspond to each other. At this time, the cardboard indentation line will be deformed and collapsed after being subjected to force, and at the same time, the corresponding left and right elastic bushings 821 will be squeezed, so that the corresponding parts of the areas are elastically compensated and fall into the corresponding pressure relief groove 822, thereby achieving the effect of pressure relief compensation for the left and right areas of the cardboard indentation line. It can also avoid the problem that a single top block with too high hardness applies uniform and excessive supporting force to the entire cardboard area, resulting in partial areas on the left and right sides of the cardboard indentation line being over-compressed and the core layer being crushed, forming an obvious collapse phenomenon, and seriously weakening the strength of the paper box.

[0033] As the transmission shaft 3 drives the corresponding pressing roller 5 to rotate, the elastic bushings 821 on the multiple pressing rollers 5 on the left side will rotate accordingly. When the left and right elastic bushings 821 are squeezed and sink into the corresponding pressure relief groove 822, and are separated from the pre-indentation areas of the upper and lower pre-pressing ring knives 81, the squeezed areas of the left and right elastic bushings 821 will be restored from the deformed state to the flat state under the action of their own elastic deformation, thereby achieving the effect of effective contact with the left and right sides of the cardboard indentation line and pressure relief again when it contacts the cardboard next time.

[0034] When the main indentation is performed on the cardboard, when the cardboard passes through the upper main pressure ring knife 83 and the lower hard bushing 841 and flexible bushing 842, the upper main pressure ring knife 83 will perform the main indentation on the cardboard. Since the main indentation requires greater pressure to completely shape the cardboard, the hard bushing 841 is required to replace the lower rigid mold to avoid excessive pressure or stress concentration when rigid-to-rigid contact causes the cardboard to be cracked, and the hard bushing 841 is fixedly mounted on the corresponding pressing roller 5 to provide a buffer and uniform support force for the cardboard indentation. During this period, the upper main pressure ring knife 83 will work together with the lower hard bushing 841 to squeeze the cardboard to form the final indentation line. The cardboard will be subjected to a greater extrusion pressure in the left and right areas of the indentation line, and will also experience problems such as deformation and collapse due to stress. The partial areas of the left and right flexible bushings 842 on the corresponding pressing roller 5 will correspond to the left and right areas of the cardboard indentation line, respectively. When the cardboard indentation line is subjected to force, it will deform and collapse, and will squeeze the corresponding left and right flexible bushings 842 at the same time, so that the corresponding parts of the areas are elastically compensated and fall into the corresponding pressure relief groove 843. At this time, the deformed parts of the left and right flexible bushings 842 will squeeze the corresponding magnetic slides 844 to slide to the side away from the corresponding hard bushing 841, thereby achieving the effect of pressure relief compensation for the left and right areas of the cardboard indentation line. It can also avoid the top block with too low hardness providing insufficient support force, and lack of sufficient reaction force under the cardboard to form a clear, full, and deep indentation line, which leads to subsequent folding difficulties, inaccuracies, burst lines or rebound after folding. It should be noted that when the cardboard forms the final indentation line and continues to be transported to the right to complete the entire indentation work of the cardboard, it finally slides onto the receiving plate 2 and is uniformly received and processed by the external receiving equipment.

[0035] As the transmission shaft 3 drives the corresponding pressure roller 5 to rotate, the flexible bushings 842 on the front and rear pressure rollers 5 on the lower right side will rotate accordingly. When the left and right flexible bushings 842 are squeezed and sink into the partial area of ​​the corresponding pressure relief groove 2 843, they are both separated from the main indentation area of ​​the corresponding main pressure ring knife 83 and the hard bushing 841. It should be noted that since the pressure relief groove 2 843 opened on the pressure roller 5 in the main indentation area is annular in design, and the pressure relief groove 1 822 opened on the pressure roller 5 in the pre-indentation area is arc-shaped, the intermittently opened pressure relief groove 1 822 can provide a certain amount of assistance for the elastic deformation and reset of the corresponding elastic bushing 821, and the pressure of the pre-indentation is originally smaller than the pressure of the main indentation, and the elastic The elastic compensation made by the flexible bushing 821 is smaller in the corresponding pressure relief groove 1 822 and is easier to reset. On the contrary, after the left and right flexible bushings 842 are subjected to the extrusion pressure, the elastic compensation made by them is more deformed in the corresponding pressure relief groove 2 843, and the pressure relief groove 2 843 cannot provide any assistance to the resetting of the flexible bushing 842. At this time, the corresponding several magnetic slides 844 in the pressure relief groove 2 843 will slowly slide toward the side close to the corresponding hard bushing 841 under the action of the compression spring, which can provide a certain assistance for the process of the squeezed parts of the left and right flexible bushings 842 gradually recovering from the deformed state to the flat state under the action of their own elastic deformation.

[0036] If the squeezed areas of the left and right flexible bushings 842 cannot be completely restored to a flat state due to their own elastic deformation, when the deformed areas of the left and right flexible bushings 842 follow the corresponding pressure rollers 5 to rotate to the position corresponding to the strong magnet 732, it should be noted that the magnetism of the multiple magnetic slides 844 is repelled from the magnetism of the strong magnet 732. The corresponding magnetic slides 844 here will slide further toward the side close to the corresponding hard bushing 841 under the force of magnetic repulsion, thereby pushing the corresponding flexible bushing 842 from a deformed state to a flat state, so as to achieve the effect of effective contact with the left and right areas of the cardboard indentation line and pressure relief again when it contacts the cardboard next time.

[0037] When adjusting the left and right spacing of the pressing rollers 5, the external drive controls the upper and lower two bidirectional screws 71 to rotate forward and reverse respectively, and the upper and lower two bidirectional screws 71 will respectively drive the corresponding support plates 722 to move closer to or away from each other, and the front and rear support plates 722 will respectively drive the corresponding connecting plates 72 to move closer to or away from each other through the corresponding front and rear connecting slides 721, and the front and rear connecting plates 72 will respectively drive the corresponding pressing rollers 5 to move closer to or away from each other through the corresponding conveying rollers 6, thereby conveniently achieving the effect of precisely adjusting the left and right spacing of the pressing rollers 5 through the bidirectional screws 71; and when adjusting the upper and lower spacing of the pressing rollers 5, the external drive controls the front and rear two adjusting screws 41 to rotate forward and reverse respectively, and the front and rear two adjusting screws 41 will respectively drive the corresponding When the sleeve plate 4 moves upward or downward, the front and rear sleeve plates 4 located on the upper side will jointly drive the left and right transmission shafts 3 on the upper side to slide upward or downward along the waist-shaped sliding hole, so as to conveniently achieve the effect of precisely adjusting the upper and lower spacing of the pressing roller 5 by adjusting the lead screw 41. With the flexible compensation of the elastic bushing 821 and the hard bushing 841, it can avoid the problem that a single hardness top block is used to obtain a barely acceptable indentation effect, the spacing adjustment fault tolerance is low, and slight vibration of the machine or slight fluctuation in the thickness of the cardboard will lead to batch collapse or poor indentation. The dense small protrusions on the hard bushing 841 and the sparse large protrusions on the flexible bushing 842 are of a gradient design, which can not only provide a support gradient for the cardboard, but also guide the cardboard fiber flow during the indentation process, reducing friction and scratches on the cardboard.

[0038] In summary, this application has the following advantages: Advantage 1: When pre-indenting the cardboard, partial areas of the left and right elastic bushings 821 on the corresponding pressing roller 5 will correspond to the left and right areas of the cardboard indentation line respectively. At this time, the cardboard indentation line will be deformed and collapsed after being subjected to force, and at the same time, the corresponding left and right elastic bushings 821 will be squeezed, so that the corresponding partial areas are elastically compensated and fall into the corresponding pressure relief groove 822, thereby achieving the effect of pressure relief compensation for the left and right areas of the cardboard indentation line. It can also avoid the problem that a single top block with too high hardness applies uniform and excessive supporting force to the entire cardboard area, resulting in partial areas on the left and right sides of the cardboard indentation line being over-compressed and the core layer being crushed, forming an obvious collapse phenomenon, and seriously weakening the strength of the paper box.

[0039] Advantage 2: As the transmission shaft 3 drives the corresponding pressing roller 5 to rotate, the elastic bushings 821 on the multiple pressing rollers 5 on the left side will rotate accordingly. When the left and right elastic bushings 821 are squeezed and sink into the corresponding pressure relief groove 822, and are separated from the pre-indentation areas of the upper and lower pre-pressing ring knives 81, the squeezed areas of the left and right elastic bushings 821 will be restored to a flat state from a deformed state under the action of their own elastic deformation, thereby achieving the effect of effective contact with the left and right sides of the cardboard indentation line and pressure relief again when they come into contact with the cardboard next time.

[0040] Advantage three: when the main indentation is performed on the cardboard, the indentation line of the cardboard will be deformed and collapsed after being subjected to force, and the corresponding left and right flexible bushings 842 will be squeezed at the same time, so that the corresponding parts of the areas are elastically compensated and fall into the corresponding pressure relief groove 2 843, thereby achieving the effect of pressure relief compensation on the left and right areas of the cardboard indentation line. It can also avoid the top block with too low hardness providing insufficient support force, lack of sufficient reaction force under the cardboard to form a clear, full, and deep indentation line, resulting in subsequent folding difficulties, inaccuracies, line bursting or rebound after folding.

[0041] Advantage four, as the transmission shaft 3 drives the corresponding pressure roller 5 to rotate, when the left and right flexible bushings 842 are squeezed and sink into the partial area of ​​the corresponding pressure relief groove 2 843, and both are separated from the main indentation area of ​​the corresponding main pressure ring knife 83 and the hard bushing 841, the corresponding several magnetic slides 844 in the pressure relief groove 2 843 will slowly slide toward the side close to the corresponding hard bushing 841 under the action of the compression spring, which can provide certain assistance for the process of the squeezed partial areas of the left and right flexible bushings 842 gradually recovering from the deformed state to the flat state under the action of their own elastic deformation.

[0042] Advantage five: when the deformed areas of the left and right flexible bushings 842 follow the corresponding pressure rollers 5 to rotate to the position corresponding to the strong magnets 732, the corresponding magnetic slides 844 will slide further toward the side close to the corresponding hard bushing 841 under the force of magnetic repulsion, thereby pushing the corresponding flexible bushings 842 from the deformed state to the flat state, thereby achieving the effect of effective contact with the left and right areas of the cardboard indentation line and pressure relief again when it contacts the cardboard next time.

[0043] Advantage six: when adjusting the left and right spacing of the pressing rollers 5, the external drive controls the forward and reverse rotation of the upper and lower bidirectional screws 71 respectively, and the front and rear connecting plates 72 will respectively drive the corresponding pressing rollers 5 to approach or move away from each other through the corresponding conveying rollers 6, thereby conveniently achieving the effect of precisely adjusting the left and right spacing of the pressing rollers 5 through the bidirectional screw 71; and when adjusting the upper and lower spacing of the pressing rollers 5, the external drive controls the forward and reverse rotation of the front and rear adjusting screws 41 respectively, and the front and rear upper sleeves 4 will jointly drive the upper left and right transmission shafts 3 to slide upward or downward along the waist-shaped sliding hole, thereby conveniently achieving the effect of precisely adjusting the upper and lower spacing of the pressing rollers 5 through the adjusting screw 41. Combined with the flexible compensation of the elastic bushing 821 and the hard bushing 841, it can avoid the problem that a single hardness top block is used to obtain a barely acceptable indentation effect, and the spacing adjustment fault tolerance is low. Slight vibration of the machine or slight fluctuation in cardboard thickness will lead to batch collapse or poor indentation.

[0044] Advantage seven: the dense small bumps on the hard bushing 841 and the sparse large bumps on the flexible bushing 842 are of a gradient design, which not only provides a support gradient for the cardboard, but also guides the flow of cardboard fibers during the indentation process, reducing friction and scratches on the cardboard.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cardboard anti-collapse indentation device based on a gradient elastic top block, characterized in that: include: A frame (1) with a material receiving plate (2) on the right side, a plurality of rectangular evenly distributed transmission shafts (3) are installed on the inner walls of the front and rear ends of the frame (1) for common rotation, a plurality of matching slide grooves are preset on the outer walls of the transmission shafts (3), and a sleeve plate (4) is provided on the front and rear ends of each corresponding left and right transmission shafts (3) for common rotation, and a pressure roller (5) is provided on the outer walls of the upper and lower transmission shafts (3) on the left side for symmetrical sliding sleeves, and a conveying roller (6) which is also slidably sleeved on the pressure roller (5) is installed on the front and rear ends of the pressure roller (5), an adjustment part (7) is provided on the frame (1), and an indentation part (8) is provided on the plurality of pressure rollers (5); The adjusting portion (7) includes a bidirectional lead screw (71) which is installed on the inner walls of the front and rear ends of the frame (1) and rotates therethrough. A connecting plate (72) is provided on the outer walls of the left and right transmission shafts (3) on the upper side and a plurality of adjusting plates (73) are provided on the outer walls of the left and right transmission shafts (3) on the lower side. The two adjusting plates (73) on the lower side are both provided with extension plates (74) at their opposite ends. The indentation portion (8) includes a pre-pressing ring knife (81) fixedly mounted on the outer wall of the plurality of pressure rollers (5) on the left side, a pre-pressing group (82) is provided on the plurality of pressure rollers (5) on the left side, a main pressing ring knife (83) is fixedly mounted on the outer wall of the two pressure rollers (5) on the upper right side, and a main pressing group (84) is provided on the two pressure rollers (5) on the lower right side.

2. The cardboard box anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: The pre-pressing group (82) includes elastic bushings (821) provided on both the front and rear sides of the pre-pressing ring knife (81), the elastic bushings (821) on both the front and rear sides are fixedly sleeved on the pressure roller (5), and a pressure relief groove (822) is provided on the outer wall of the pressure roller (5) corresponding to the two front and rear elastic bushings (821).

3. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: The main pressure group (84) includes a hard bushing (841) fixedly mounted on the outer wall of the pressure roller (5), and a plurality of groups of dense small convex points evenly distributed in a circumference are provided on the outer wall of the hard bushing (841). A flexible bushing (842) is fixedly mounted on the outer wall of the pressure roller (5) on both the front and rear sides of the hard bushing (841), and a plurality of groups of sparse large convex points evenly distributed in a circumference are provided on the outer wall of the flexible bushing (842). A second pressure relief groove (843) is provided on the outer wall of the pressure roller (5) corresponding to the front and rear flexible bushings (842). A plurality of magnetic slides (844) evenly distributed in a circumference are slidably mounted on the inner wall of the second pressure relief groove (843) through a compression spring, and the plurality of magnetic slides (844) on the front and rear sides are symmetrically arranged.

4. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: The opposite ends of the front and rear connecting plates (72) are respectively rotatably connected to the corresponding conveying rollers (6); the upper ends of the connecting plates (72) are symmetrically mounted with connecting slide bars (721); the upper side of the connecting plates (72) is provided with a support plate (722) which is threadedly sleeved on the bidirectional lead screw (71); and the left and right connecting slide bars (721) are both slidably passed through the support plate (722).

5. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: The plurality of adjustment plates (73) are rotatably connected to the corresponding conveying rollers (6), and the opposite ends of the frontmost and rearmost adjustment plates (73) corresponding to the right conveying roller (6) are both installed with docking slides (731), and the lower sides of the opposite ends of the front and rear docking slides (731) are both embedded with strong magnets (732), and the conveying roller (6) corresponding to the adjustment plate (73) on the lower right side is provided with an annular groove at one end facing the docking slide (731), and the docking slide (731) is slidably connected to the inner wall of the corresponding annular groove.

6. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: The frame (1) is provided with avoidance grooves on the inner walls at both the front and rear ends, a baffle (741) is installed on one end of the extension plate (74) facing the avoidance groove, a mounting groove is provided on the upper end of the baffle (741), an auxiliary pressure plate (742) is slidably connected to the inner wall of the mounting groove via a compression spring, a sliding hole is symmetrically provided on the upper end of the baffle (741), a support slide rod (743) is slidably installed in the sliding hole, and the lower end of the support slide rod (743) is connected to the baffle (741) via a compression spring, and a positioning plate (744) is installed on the upper ends of the left and right support slide rods (743), and a cover plate (745) is installed on one end of the positioning plate (744) facing the corresponding adjustment plate (73).

7. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 1, characterized in that: Each of the upper and lower sleeve plates (4) is commonly provided with an adjusting screw (41) fixedly connected to the frame (1) through a bearing seat, the upper side of the adjusting screw (41) is threadedly connected to the sleeve plate (4), and the lower side of the adjusting screw (41) rotates and penetrates the lower sleeve plate (4).

8. The cardboard box board anti-collapse indentation device based on a gradient elastic top block according to claim 6, characterized in that: The inner walls at the front and rear ends of the frame (1) are provided with waist-shaped sliding holes corresponding to the left and right transmission shafts (3) on the upper side. The front and rear ends of the left and right transmission shafts (3) on the upper side are respectively slidably connected to the inner walls of the corresponding waist-shaped sliding holes, and the rear ends of the left and right transmission shafts (3) on the upper and lower sides are connected by synchronous belts.

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