A corrugating machine for processing compression-resistant cardboard cores for cartons

Abstract

This application relates to the technical field of corrugated cardboard box processing, and discloses a corrugating machine for processing compression-resistant cardboard cores for cardboard boxes, comprising: a corrugating roller; a glue-applying roller; a pressure roller body with a heating unit disposed inside; partitions, evenly spaced and detachably installed on the outer periphery of the pressure roller body; an mounting cavity formed between adjacent partitions; a covering strip, detachably disposed within the mounting cavity, with an mounting cavity between adjacent covering strips; fixing strips, spaced apart within the mounting cavity and staggered with the covering strips, the covering strips and fixing strips having the same outer diameter; and a fixing assembly for fixing the partitions. This application enables partial replacement of the covering strips.

Description

Technical Field

[0001] This application relates to the technical field of corrugated cardboard box processing, and in particular to a corrugating machine for processing the compression-resistant paper core of cardboard boxes. Background Technology

[0002] The corrugating machine is the core equipment in a corrugated board production line. Its main function is to process flat base paper (core paper) into corrugated core paper (paper core) with a wavy structure, and then bond it with the face paper / liner paper to form single-faced corrugated board. This processing directly determines the shape, size, stiffness, and bonding strength of the corrugated paper core, thus greatly affecting the compressive strength of the final carton.

[0003] A corrugating machine consists of an upper corrugating roll and a lower corrugating roll. Under strong mechanical pressure and high temperature (the corrugating roll is internally heated by steam, with a surface temperature typically between 170-190°C), the soft core paper is forced into the grooves of the corrugating roll. The core paper undergoes permanent plastic deformation under the interlocking action of the grooves and peaks, forming a continuous, regularly undulating wave shape (corrugation). The top (flute peak) of the newly formed corrugated core paper contacts the coating roller, whose surface is immersed in a starch adhesive paste trough. As it rotates, it evenly transfers an appropriate amount of starch paste onto the flute peaks of the corrugated core paper. The coated corrugated core paper, along with the preheated face paper, passes through the meshing line formed by the pressure roller (also called the gelatinizing roller) and the lower corrugating roll. Under the pressure of the pressure roller (usually lower than the corrugating roll pressure) and the residual heat of the corrugating roll, the starch paste begins to gelatinize (gel), firmly adhering the face paper to the flute peaks of the corrugated core paper.

[0004] The surface of the pressure roller (gelatinizing roller) is usually covered with a layer of rubber or polyurethane material with certain elasticity and heat resistance (called "coating"). When the coated corrugated core paper and face paper pass through the meshing line between the pressure roller and the lower corrugated roller, the elastic coating layer of the pressure roller will undergo local deformation (depression) under the set pressure. The elastic coating layer can better adapt to the small changes in the shape of the corrugation, significantly increasing the actual contact area between the pressure roller and the top of the corrugation (compared to rigid contact).

[0005] Regarding the aforementioned technologies, the elastic coating layer is intermittently squeezed by the tooth peaks of the lower corrugated roller, resulting in localized depressions. When the depth of a localized depression exceeds a specific value, the entire coating layer needs to be replaced. Both detection and replacement require disassembling the pressure roller, which is a rather cumbersome process. Summary of the Invention

[0006] To address the aforementioned issues, this application provides a corrugating machine for processing compression-resistant paper cores for cardboard boxes.

[0007] This application provides a corrugating machine for processing compression-resistant paper cores for cardboard boxes, employing the following technical solution:

[0008] A corrugating machine for processing compression-resistant cardboard cores for cartons includes:

[0009] Corrugated rollers;

[0010] Glue-applying roller;

[0011] The pressure roller body has an internal heating unit;

[0012] Partitions are detachably and evenly spaced on the outer periphery of the pressure roller body; an installation cavity is formed between two adjacent partitions.

[0013] A covering strip is detachably disposed within the mounting cavity, and there is a mounting cavity between two adjacent covering strips;

[0014] Fixing strips are spaced apart within the mounting cavity and are staggered with the covering strips. The outer diameters of the covering strips and the fixing strips are the same.

[0015] A fixing component for fixing the partition.

[0016] By adopting the above technical solution, partial replacement of the covering strip can be achieved without disassembling the pressure roller as a whole. When the operator detects that a section of the covering strip is excessively dented, the fixing component is disassembled, the covering strip is taken out, and a new strip is replaced. Since there is a gap between the two peaks of the corrugated paper, a fixing strip is set. The fixing strip does not contact the corrugated core paper, and the outer diameter of the covering strip and the fixing strip are the same and staggered to ensure that the surface of the pressure roller is flat.

[0017] Optionally, positioning rings are installed at both ends of the pressure roller body along the axial direction, and the two ends of the covering strip along the length direction respectively abut against the positioning rings.

[0018] By adopting the above technical solution, the positioning ring restricts the axial displacement of the covering strip, thus avoiding the risk of misalignment during production.

[0019] Optionally, the gap between the covering strip and the fixing strip is greater than the thickness of the partition. Both positioning rings are rotatably mounted with positioning rods. The positioning rods on one positioning ring correspond one-to-one with the partitions. A rotating shaft is rotatably connected between the positioning rods and the positioning rings. The central axis of the rotating shaft is parallel to the central axis of the pressure roller body. The partition is slidably mounted on the positioning rod. A slot for inserting the partition is provided on the outer periphery of the pressure roller body. When the partition is inserted into the slot, the partition and the covering strip are in contact, and the partition restricts the rotation of the positioning rod.

[0020] By adopting the above technical solution, the partition is slidably installed on the positioning rod. When the partition is pulled out, it rotates in conjunction with the rod, releasing the space for the covering strip and exposing the installation cavity for easy replacement of the covering strip. When the partition is inserted into the slot, the positioning rod is automatically locked and rotated.

[0021] Optionally, the partition has a first insertion hole, and the fixing assembly includes a fixing plate. One end of the fixing plate is slidably mounted on the fixing strip. The fixing plate slides along the circumferential direction of the rotating shaft, and the other end of the fixing plate is provided with a first fixing rod. When the partition is inserted into the slot, the first fixing rod is inserted into the first insertion hole.

[0022] By adopting the above technical solution, after the partition is inserted into the slot, the first fixing rod is inserted into the first insertion hole, the partition is fixed, and the covering strip installed between the two partitions is also fixed.

[0023] Optionally, the fixing assembly further includes a compression spring, the side wall of the fixing strip has a receiving cavity, the compression spring is installed in the receiving cavity, and one end of the fixing plate is inserted into the receiving cavity and connected to the compression spring.

[0024] By adopting the above technical solution, the compression spring drives the fixing plate to always have the tendency to insert into the partition, so that the fixing strip is stably inserted into the partition.

[0025] Optionally, the partition plate is provided with a second insertion hole, and the fixing plate is also provided with a second fixing rod. When the first fixing rod is inserted into the first insertion hole, the second fixing rod is inserted into the second insertion hole. When the partition plate leaves the slot, both the first fixing rod and the second fixing rod are inserted into the second insertion hole. When the partition plate rotates around the pivot, the partition plate and the fixing plate slide in contact.

[0026] By adopting the above technical solution, after the compression spring causes the fixed plate to leave the partition, the partition can be disengaged from the slot. Then the fixed plate is released, allowing it to be reinserted into the second insertion hole. The second insertion hole restricts the partition from disengaging from the positioning rod, but it can rotate with the positioning rod.

[0027] Optionally, a reinforcing member is detachably installed on the fixing plate, one end of the reinforcing member abutting against the partition plate, and the other end of the reinforcing member abutting against the fixing strip.

[0028] Optionally, the reinforcing member is an arc-shaped plate, which is bolted to the fixing plate. The outer diameter of the arc-shaped plate is the same as the outer diameter of the fixing strip. One end of the arc-shaped plate abuts against the partition plate along the arc direction, and the other end abuts against the fixing strip.

[0029] By adopting the above technical solution, the arc-shaped plate, along with the rotation of the pressure roller body, contacts the face paper, increasing the contact area between the pressure roller body and the face paper.

[0030] Optionally, the reinforcing component is a reinforcing rod, which is bolted to the fixing plate.

[0031] In summary, this application includes at least one of the following beneficial effects:

[0032] 1. When a section of the covering strip is found to be excessively dented, only the fixing component at the corresponding position needs to be removed to replace the single covering strip. There is no need to disassemble the entire pressure roller, which greatly simplifies the maintenance process and reduces downtime.

[0033] 2. The pressure roller surface is ensured to be flat by staggering the fixing strips and the covering strips with the same outer diameter; at the same time, the partition and the covering strip are firmly fixed by components such as positioning rings, fixing plates, and compression springs. Attached Figure Description

[0034] Figure 1 This is a cross-sectional schematic diagram of the cooperation between the pressure roller body and the corrugated roller in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram illustrating the overall structure of the pressure roller body in an embodiment of this application;

[0036] Figure 3 This is a cross-sectional view of the overall structure of the pressure roller body as shown in this application.

[0037] Figure 4 This is a partial exploded view of an embodiment of this application;

[0038] Figure 5 This is a cross-sectional schematic diagram illustrating the installation of the positioning rod according to an embodiment of this application;

[0039] Figure 6 This is a schematic diagram illustrating the structure of the covering strip and positioning strip installed on the pressure roller body according to an embodiment of this application;

[0040] Figure 7 This is a cross-sectional schematic diagram illustrating the installation of the covering strip and the positioning strip on the pressure roller body according to an embodiment of this application;

[0041] Figure 8 This is a schematic diagram illustrating the structure of the fixing plate and the first insertion hole in an embodiment of this application;

[0042] Figure 9 This is a schematic diagram illustrating the state in which the partition rotates away from the covering strip according to an embodiment of this application;

[0043] Figure 10 This is a schematic diagram of the overall structure of the pressure roller body with the arc-shaped plate installed in an embodiment of this application;

[0044] Figure 11 This is a cross-sectional view of the pressure roller body with an arc-shaped plate mounted on it, according to an embodiment of this application.

[0045] Explanation of reference numerals in the attached drawings: 100, corrugated roller; 200, glue-applying roller; 300, pressure roller body; 310, positioning ring; 311, groove; 312, clearance groove; 320, positioning rod; 321, positioning groove; 322, rotating shaft; 330, slot; 400, heating unit; 500, partition plate; 510, mounting cavity; 520, protrusion; 530, insertion part; 540, first insertion hole; 550, second insertion hole; 600, covering strip; 700, fixing strip; 710, receiving cavity; 800, fixing component; 810, fixing plate; 820, first fixing rod; 830, second fixing rod; 840, compression spring; 900, arc plate; 910, bolt. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1 - Appendix Figure 11 This application will be described in further detail.

[0047] This application discloses a corrugating machine for processing compression-resistant cardboard cores for cartons. (Refer to...) Figure 1 A corrugating machine for processing cardboard cores for compression resistance includes a corrugating roller 100, a glue-coating roller 200, and a pressure roller body 300. The soft core paper is forcibly squeezed into the grooves of the corrugating roller 100. Under the interlocking action of the grooves and peaks, the core paper undergoes permanent plastic deformation. The surface of the glue-coating roller 200 is immersed in a starch adhesive paste tank, and during rotation, an appropriate amount of starch paste is evenly transferred to the peaks of the corrugated core paper. The pressure roller body 300 draws the face paper into contact with the glue-coated peaks of the corrugated core paper, firmly adhering the face paper to the peaks of the corrugated core paper.

[0048] A heating unit 400 is provided inside the pressure roller body 300. The pressure roller body 300 has an inner cavity. The heating unit 400 includes a heating pipe through which high-temperature steam flows, transferring temperature to the surface of the pressure roller body 300. The heating unit 400 is prior art and has not been improved. The accompanying drawings are for illustrative purposes only and will not be described in detail.

[0049] Reference Figure 2 and Figure 3The outer surface of the pressure roller body 300 is uniformly spaced with partitions 500, forming an installation cavity 510 between adjacent partitions 500. The pressure roller body 300 is equipped with a long strip-shaped covering strip 600 and a fixing strip 700. The covering strip 600 has a fan-shaped cross-section. The covering strip 600 and the fixing strip 700 are installed in different installation cavities 510, and are staggered. Both the covering strip 600 and the fixing strip 700 have the same outer diameter, allowing them to contact the face paper. More specifically, the covering strip 600 is detachable, while the fixing strip 700 is fixedly installed. The covering strip 600 is made of a thermally conductive elastic material, such as polyurethane (PU). The fixing strip 700 is made of a thermally conductive rigid material, such as ceramic and carbon materials or metal-based composite materials. The coating strip 600 and the fixing strip 700 can absorb the heat from the heating unit 400, thereby heating the pulled face paper. When the face paper on the coating strip 600 comes into contact with the flute peak, the temperature on the coating strip 600 can also accelerate the gelatinization of the starch paste.

[0050] Reference Figure 2 The axial length of the pressure roller body 300 is greater than the length of the corrugated roller 100. Positioning rings 310 are installed at both ends of the pressure roller body 300 along its axial direction. The positioning rings 310 do not contact the corrugated roller 100 or the corrugated paper. The two ends of the covering strip 600 abut against the positioning rings 310 along its length. The partition plate 500 and the sidewall of the covering strip 600 are in contact, ensuring that the covering strip 600 is securely installed on the pressure roller body 300.

[0051] Reference Figure 2 and Figure 4 The two positioning rings 310 have grooves 311 on their close end faces. A positioning rod 320 is installed in the groove 311 of the positioning ring 310. The groove wall of the groove 311 has a relief groove 312 for the positioning rod 320 to rotate. The number of positioning rods 320 and the number of partitions 500 are set accordingly.

[0052] Reference Figure 4 and Figure 5The positioning rod 320 is rotatably mounted on the positioning ring 310 via a rotating shaft 322, the central axis of which is parallel to the central axis of the pressure roller body 300. The positioning rod 320 has a positioning groove 321 along its length. Protrusions 520 extend from both ends of the partition plate 500, inserting into the positioning groove 321 and sliding along it. A slot 330 is provided on the outer periphery of the pressure roller body 300 for inserting the partition plate 500. The partition plate 500 has an insertion part 530; when the insertion part 530 is inserted into the slot 330, the partition plate 500 contacts the side wall of the covering strip 600, and the positioning rod 320 no longer rotates. The partition plate 500 is made of a thermally conductive material, such as a thermally conductive metal. The partition plate 500 is closer to the heating unit 400 via the slot 330. Both the partition plate 500 and the pressure roller body are thermally conductive, allowing the covering strip 600 to absorb heat more fully.

[0053] Reference Figure 6 A gap larger than the thickness of the partition 500 is left between the covering strip 600 and the fixing strip 700. The side wall of the fixing strip 700 near the covering strip 600 is inclined. When the partition 500 is inserted into the slot 330, a gap remains between the side walls of the partition 500 and the fixing strip 700, and the gap gradually increases along the radial direction of the pressure roller body 300. When the partition 500 is pulled out of the slot 330, it rotates towards the fixing strip 700 along with the positioning strip, expanding the space for installing and removing the covering strip 600, making it easier to replace a single covering strip 600.

[0054] Reference Figure 7 and Figure 8 A corrugating machine for processing cardboard box compression-resistant paper cores also includes a fixing assembly 800 for fixing partitions 500. The fixing assembly 800 includes a fixing plate 810, a first fixing rod 820, and a second fixing rod 830. The fixing plate 810 has an arc-shaped structure, and its central axis coincides with the central axis of the rotating shaft 322. One end of the fixing plate 810 is slidably mounted on a fixing strip 700, and the other end of the fixing plate 810 is fixedly connected to the first fixing rod 820 and the second fixing rod 830. The partition 500 has a first insertion hole 540 and a second insertion hole 550, which are arranged vertically. When the partition 500 is inserted into the slot 330, the first fixing rod 820 slides into the first insertion hole 540, preventing the partition 500 from leaving the slot 330. The two partitions 500 fix the covering strip 600. The second fixing rod 830 is also inserted into the second socket 550, and there is a gap between the second fixing rod 830 and the wall of the second socket 550. At this time, the second socket 550 plays a role in accommodating the second fixing rod 830.

[0055] Reference Figure 7The fixing assembly 800 also includes a compression spring 840. A receiving cavity 710 is provided on the side wall of the fixing strip 700. The compression spring 840 is installed inside the receiving cavity 710. The fixing plate 810 is inserted into the receiving cavity 710 and fixedly connected to one end of the compression spring 840. The elastic force of the compression spring 840 drives the fixing plate 810 to press against the partition 500, improving the stability of the partition 500 during installation.

[0056] Reference Figure 9 After the partition 500 can leave the slot 330 along the positioning strip, the first fixing rod 820, the second fixing rod 830, and the fixing plate 810 can all be inserted into the second insertion hole 550. The fixing plate 810 restricts the partition 500 from completely leaving the positioning strip, but the fixing plate 810 can slide in contact with the partition 500 as the positioning rod 320 rotates. When the partition 500 rotates to contact the side wall of the fixing strip 700, the partition 500 is completely within the distance between the covering strip 600 and the fixing strip 700.

[0057] Reference Figure 9 When there is a gap between the partition 500 and the covering strip 600, the heat dissipation effect of the covering strip 600 can be improved. Because the degree of indentation of the covering strip 600 needs to be checked before replacing it, pressure-sensitive paper can be pasted onto the covering strip 600. Pressure-sensitive paper is a special testing material used to visualize the distribution of contact pressure; the color of the display layer of the pressure-sensitive paper indicates the overall pressure condition of the covering strip 600. Pressure-sensitive paper is existing technology and will not be improved. Before pasting the pressure-sensitive paper, the covering strip 600 needs to be cooled to below 50℃. Therefore, the covering strip 600 needs both heat collection and dissipation; the rotation setting of the partition 500 improves the heat dissipation effect of the covering strip 600.

[0058] Furthermore, refer to Figure 10 and Figure 11 A reinforcing member can be detachably installed on the fixing plate 810. The reinforcing member can be an arc-shaped plate 900. One end of the arc-shaped plate 900 abuts against the partition plate 500 along the arc direction, and the other end abuts against the fixing strip 700. The arc-shaped plate 900 is installed on the fixing plate 810 by bolts 910. The outer diameter of the arc-shaped plate 900 is the same as the outer diameter of the fixing plate 810. The arc-shaped plate 900 can also contact the face paper. The covering strip 600, partition plate 500, arc-shaped plate 900 and fixing plate 810 are spliced ​​together to form a complete arc surface.

[0059] The reinforcing component can also be a reinforcing rod. The reinforcing rod is installed on the fixing plate 810 by bolts 910. One end of the fixing rod abuts against the partition 500, and the other end of the fixing rod abuts against the fixing strip 700, further increasing the firmness of the partition 500.

[0060] The implementation principle of a corrugated machine for processing cardboard box compression-resistant paper cores according to an embodiment of this application is as follows:

[0061] The pressure roller body 300 is uniformly spaced with partitions 500 to form an installation cavity 510. The staggered wrapping strips 600 and fixing strips 700 are placed in the installation cavity 510 with the same outer diameter to ensure that the surface in contact with the face paper is flat. In conjunction with the internal heating unit 400, heat is transferred to provide stable pressure and temperature when the corrugated core paper and face paper are bonded, ensuring the bonding strength. During maintenance, the partitions 500 are released by fixing components 800. The partitions 500 slide along the positioning rod 320 and rotate around the rotating shaft 322, exposing the installation cavity 510. The wrapping strips 600 with excessive dents can be replaced individually without disassembling the entire pressure roller. At the same time, the positioning ring 310 restricts the axial displacement of the wrapping strips 600. The reinforcement parts (arc plate 900 or reinforcing rod) enhance the structural stability, taking into account both processing quality and maintenance efficiency.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A corrugating machine for processing compression-resistant cardboard cores for cartons, characterized in that, include: Corrugated roller (100); Glue-applying roller (200); The pressure roller body (300) has a heating unit (400) inside. Partitions (500) are detachably installed on the outer periphery of the pressure roller body (300) at uniform intervals; an installation cavity (510) is formed between two adjacent partitions (500). A covering strip (600) is detachably disposed in the mounting cavity (510), and there is a mounting cavity (510) between two adjacent covering strips (600). The fixing strip (700) is spaced apart in the mounting cavity (510) and is staggered with the covering strip (600). The outer diameters of the covering strip (600) and the fixing strip (700) are the same. A fixing component (800) is used to fix the partition (500); Positioning rings (310) are installed at both ends of the pressure roller body (300) in the axial direction, and the two ends of the covering strip (600) in the length direction respectively abut against the positioning rings (310); The gap between the covering strip (600) and the fixing strip (700) is greater than the thickness of the partition plate (500). Both positioning rings (310) are rotatably mounted with positioning rods (320). Each positioning rod (320) on a positioning ring (310) corresponds one-to-one with a partition plate (500). A rotating shaft (322) rotatably connects the positioning rod (320) and the positioning ring (310). The central axis of the rotating shaft (322) and... The central axis of the pressure roller body (300) is parallel, the partition (500) is slidably mounted on the positioning rod (320), and the outer periphery of the pressure roller body (300) is provided with a slot (330) for inserting the partition (500). When the partition (500) is inserted into the slot (330), the partition (500) contacts the covering strip (600), and the partition (500) restricts the rotation of the positioning rod (320).

2. The corrugating machine for processing compression-resistant cardboard cores for cartons according to claim 1, characterized in that, The partition (500) has a first insertion hole (540). The fixing component (800) includes a fixing plate (810). One end of the fixing plate (810) is slidably mounted on the fixing strip (700). The fixing plate (810) slides along the circumferential direction of the rotating shaft (322). The other end of the fixing plate (810) is provided with a first fixing rod (820). When the partition (500) is inserted into the slot (330), the first fixing rod (820) is inserted into the first insertion hole (540).

3. A corrugating machine for processing compression-resistant paper cores for cardboard boxes according to claim 2, characterized in that, The fixing assembly (800) also includes a compression spring (840). The side wall of the fixing strip (700) has a receiving cavity (710). The compression spring (840) is installed in the receiving cavity (710). One end of the fixing plate (810) is inserted into the receiving cavity (710) and connected to the compression spring (840).

4. A corrugating machine for processing compression-resistant paper cores for cardboard boxes according to claim 3, characterized in that, The partition (500) is provided with a second insertion hole (550), and the fixing plate (810) is also provided with a second fixing rod (830). When the first fixing rod (820) is inserted into the first insertion hole (540), the second fixing rod (830) is inserted into the second insertion hole (550). When the partition (500) leaves the slot (330), the first fixing rod (820) and the second fixing rod (830) are both inserted into the second insertion hole (550). When the partition (500) rotates around the pivot (322), the partition (500) and the fixing plate (810) slide in contact.

5. A corrugating machine for processing compression-resistant paper cores for cardboard boxes according to claim 4, characterized in that, A reinforcing member is detachably installed on the fixing plate (810), one end of which abuts against the partition plate (500) and the other end of which abuts against the fixing strip (700).

6. A corrugating machine for processing compression-resistant paper cores for cardboard boxes according to claim 5, characterized in that, The reinforcing component is an arc-shaped plate (900), which is installed on the fixing plate (810) by bolts (910). The outer diameter of the arc-shaped plate (900) is the same as the outer diameter of the fixing strip (700). One end of the arc-shaped plate (900) abuts against the partition plate (500) along the arc direction, and the other end abuts against the fixing strip (700).

7. A corrugating machine for processing compression-resistant paper cores for cardboard boxes according to claim 5, characterized in that, The reinforcing component is a reinforcing rod, which is installed on the fixing plate (810) by bolts (910).

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