Improved steel seal code shell changing lining roller of ZB45 packaging machine

Abstract

The utility model discloses an improved steel seal code shell changing lining roller of a ZB45 packaging machine, which comprises a steel seal code lining roller which penetrates through a fixed shaft of the steel seal code lining roller, and is characterized in that the steel seal code lining roller comprises a lining roller inner core which is detachably connected and sleeved on the fixed shaft in a penetrating manner; and the roller shell is sleeved and clamped on the lining roller inner core. The lining roller inner core comprises a left half roller, a right half roller, a left half roller and a right half roller, two inner threaded holes are formed in the right half roller; and the positioning piece is used for connecting the left half roller and the right half roller into a whole. According to the steel seal code lining roller, through the detachable design of the steel seal code lining roller, only the roller shell needs to be replaced when the steel seal code lining roller needs to be replaced, the roller shell is made of soft elastic materials, and abrasion to steel seal codes and parts in the replacement process is reduced. Due to the detachable design of the lining roller inner core, the replacement and adjustment process is more convenient, abrasion to the fixed shaft is reduced, the effective utilization rate of equipment is improved, and the loss cost of parts is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cigarette manufacturing, and more specifically, to an improved steel-printed code changing roller for a ZB45 hard-pack packaging machine. Background Technology

[0002] Generally speaking, the ZB45 packaging machine is used to package small hard-pack cigarette packs. The function of the steel stamping roller assembly is to print a clear steel stamp number on the bottom of the hard-pack cigarette pack according to the process quality requirements, and all the steel stamp characters must be neat and consistent in depth.

[0003] The ZB45 hard-pack packaging machine has a packaging speed of 400 packs / minute. During high-speed operation, the stamped serial number on each pack of cigarettes must be clear, neat, and consistent in depth. The original equipment had a metal contact surface between the stamped serial number roller and the stamped serial number, and the roller was fixed on a fixed shaft. This resulted in the stamped serial number being pressed into a fixed position on the roller each time. After prolonged use, grooves would wear out on the surface of the roller, and the stamped serial number might also wear out and deform during prolonged contact, leading to unclear, inconsistent, or even completely punctured stamped serial numbers, which seriously affected product quality.

[0004] When the above problems occur, the contact position of the steel stamp code roller needs to be adjusted. When the surface of the steel stamp code roller can no longer meet the quality requirements, the steel stamp code roller needs to be replaced. After replacement, the height of the steel stamp code also needs to be readjusted, which leads to excessive consumption of spare parts. A lot of time will be wasted during the replacement and debugging process, which will affect the effective operation rate of the equipment and also cause the risk of product quality defects.

[0005] In summary, excessive wear on the working surface of the stamping roller liner can cause quality defects such as unclear stamping numbers. At the same time, frequent adjustments and replacements of the stamping roller liner can lead to excessive consumption of spare parts. Adjusting the position of the stamping characters can also waste too much working time, resulting in reduced equipment efficiency.

[0006] Therefore, how to provide an improved steel-printed code changing liner roller for the ZB45 hard box packaging machine has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] In view of the many defects and shortcomings existing in the above-mentioned background technology, this utility model has made improvements and innovations, aiming to provide an improved steel stamp code replacement liner roller for the ZB45 packaging machine. By setting the inner core of the liner roller as a split structure, the left half roller, the right half roller and the positioning component are used to hold and fix the shaft, and a roller shell is provided. The wear part can be solved by replacing the roller shell, without replacing the entire steel stamp code liner roller, which effectively reduces the cost of replacing parts.

[0008] Another objective of this invention is that the detachable design of the left and right half-rollers makes it more convenient and time-saving to replace the steel stamp code roller.

[0009] Another objective of this invention is to design the roller shell as a soft, elastic material, which facilitates installation and removal from the inner core of the liner roller. Furthermore, it can ensure clear stamped numbers while avoiding wear on the stamped characters, thereby improving the effective utilization rate of the equipment.

[0010] To solve the above problems and achieve the objectives of the invention, this utility model provides an improved steel-printed code changing roller for the ZB45 hard-box packaging machine, achieved through the following design structure and technical solution:

[0011] An improved ZB45 packaging machine steel stamp code changing sleeve roller includes a steel stamp code sleeve roller on a fixed shaft (3) passing through the steel stamp code sleeve roller, the steel stamp code sleeve roller comprising:

[0012] The inner core of the liner roller (1) is detachably connected and sleeved on the fixed shaft (3);

[0013] Roller shell (2) is fitted and snapped onto the inner core (1) of the liner roller.

[0014] The inner core (1) of the liner roller includes:

[0015] The left half roller (11) has two through holes.

[0016] The right half roller (12) has two internal threaded holes.

[0017] Positioning element (13) is used to connect the left half roller (11) and the right half roller (12) into a whole.

[0018] Preferably, the left half roller (11) and the right half roller (12) are provided with arc-shaped locking parts along their length direction at the middle of their non-arc end faces, which are connected to the fixed shaft (3). The diameter of the arc-shaped locking parts is smaller than the diameter of the fixed shaft (3).

[0019] Preferably, the left half roller (11) and the right half roller (12) are symmetrically connected to the outer sides of their two ends, and the four limiting rings together limit the lateral movement of the roller shell (2) on the inner core (1) of the liner roller.

[0020] Preferably, the left half roller (11) has two through holes in the middle of its outer surface, which allow the positioning member (13) to pass through completely. The inside of the through hole is a stepped design, which allows the end of the positioning member (13) to be limited at the step of the through hole, while the threaded column section passes out of the left half roller (11).

[0021] The positioning element (13) has an internal hexagonal groove end at one end and a threaded column at the other end, with the end diameter being larger than the diameter of the threaded column segment.

[0022] Preferably, the roller shell (2) is a flexible structure.

[0023] Preferably, the through holes on the left half roller (11) are symmetrically designed, with one located above the fixed shaft (3) and the other located below the fixed shaft (3).

[0024] Preferably, the right half roller (12) has two internal threaded holes in the middle of its inner surface that correspond to the through holes of the left half roller (11). The left half roller (11) and the right half roller (12) are connected to each other by using a positioning member (13) and the fixing shaft (3) is clamped in the middle.

[0025] Preferably, the arc-shaped locking portions of the left half roller (11) and the right half roller (12) are further provided with inward grooves at both ends.

[0026] Preferably, the roller shell (2) comprises:

[0027] Roller shell body;

[0028] The limiting part (21) is symmetrically connected to the inner wall of the roller shell body. The limiting part (21) is a vertical structure.

[0029] The protrusions (22) are symmetrically connected to both ends of the inner wall of the roller shell body;

[0030] The protrusions (22) at both ends are used in conjunction with the limiting rings on the inner core (1) of the liner roller to limit the roller shell (2) and restrict the lateral movement of the roller shell (2).

[0031] In this utility model, the limiting part (21) is sandwiched between the left half roller (11) and the right half roller (12), and its width is the same as the width of the gap in the middle after the left half roller (11), the right half roller (12), the positioning part (13) and the fixed shaft (3) are connected, thus restricting the longitudinal movement of the roller shell (2).

[0032] The working principle is as follows: Before using the improved ZB45 hard box packaging machine steel stamp code replacement roller, the original steel stamp code roller is fixed to the fixed shaft by fixing bolts. When it is worn and needs to be replaced, firstly, the fixing bolts on the original steel stamp code roller need to be unscrewed, the entire steel stamp code roller needs to be removed and stored in the fixed position. Then, the positioning part (13) is passed through the through hole on the left half roller (11) and connected to the right half roller (12). At this time, the positioning part (13) is not tightened. Then, the connected left half roller (11) and right half roller (12) are passed through one end of the fixed shaft (3), and the other end of the fixed shaft (3) is fixed to the main body of the equipment (6). The fixed shaft (3) is located in the enclosed structure formed by the left half roller (11), the right half roller (12) and the two positioning parts (13). The upper and lower positioning parts (13) are gradually tightened so that the arc-shaped locking parts of the left half roller (11) and the right half roller (12) are tightly held on the fixed shaft (3). At this time, there is a gap between the left half roller (11) and the right half roller (12). The inner core (1) of the liner roller, which is connected as a whole, is embedded in the grooves opened inward at both ends of the arc-shaped locking part through the ring structure on the fixed shaft (3), so as to realize the lateral movement limit of the inner core (1) of the liner roller. Finally, the roller shell (2) is directly sleeved on the inner core (1) of the liner roller. The roller shell (2) is adjusted so that the upper limit part (21) of the roller shell (2) is embedded in the gap at the connection between the left half roller (11) and the right half roller (12). The protrusion (22) on the roller shell (2) is used in conjunction with the upper limit ring of the inner core (1) of the liner roller. The limiting part (21) restricts the longitudinal movement of the roller shell (2), and the protrusion (22) restricts the lateral movement of the roller shell (2).

[0033] Another installation method involves the operator manually pressing the snap-fit ​​parts of the left half roller (11) and the right half roller (12) against the fixed shaft (3), and then using the positioning part (13) to connect and fix the left half roller (11) and the right half roller (12). The remaining operation steps are the same as described above, and will not be repeated here.

[0034] During use: After the cigarette pack paper (5) from the previous station arrives at the printing station, the cigarette pack paper (5) moves and is conveyed between the steel stamping roller and the steel stamping code (4). After the cigarette pack paper (5) reaches the position to be marked, the steel stamping code (4) moves downward and prints the code on the fixed position of the cigarette pack paper (5). Due to the use of a soft material roller shell (2), the wear between the steel stamping roller and the steel stamping code (4) is reduced, and the consumption of spare parts is reduced while ensuring the clarity of the steel stamp number.

[0035] When replacement is required: If the roller shell (2) is severely worn and needs to be replaced, simply remove the damaged roller shell (2) from the inner core (1) of the liner roller, replace it with a new roller shell (2), and adjust the roller shell (2) to the corresponding limit position; if the entire steel stamp code liner roller needs to be replaced, first remove the roller shell (2), loosen and remove the positioning part (13), separate the left half roller (11) and the right half roller (12) and remove them, and then replace the new steel stamp code liner roller according to the above operation.

[0036] Because the roller shell (2) is made of soft material, it can be disassembled using tools such as scissors when the roller shell (2) is severely worn.

[0037] In summary, the beneficial effects of this utility model compared with the prior art are as follows:

[0038] 1. This utility model sets the steel stamp code liner roller as a separate structure of the inner core (1) and the roller shell (2). In the original steel stamp code liner roller, frequent replacement of the steel stamp code liner roller will cause wear and tear on the parts and other components. After the replacement, it is also necessary to adjust the height and position of the steel stamp code (4), which will waste time and parts cost. By using the separate design of the inner core (1) and the roller shell (2), when the outer surface of the roller shell (2) is worn, only the roller shell (2) needs to be replaced. The replacement is convenient and will not cause wear and tear on other components during disassembly and assembly. It saves time, improves the effective utilization rate of the equipment, and reduces the cost of parts.

[0039] 2. The present invention sets the inner core (1) of the liner roller as a split design, which makes disassembly and installation more convenient when the entire steel stamp code liner roller needs to be replaced. The clamping design between the left half roller (11) and the right half roller (12) can also reduce the wear on the fixed shaft (3) and save time.

[0040] 3. This utility model uses a soft material as the roller shell (2) to facilitate replacement, and while ensuring the quality of the stamped number, it reduces the wear on the stamped characters (4) and reduces the cost of parts wear. Attached Figure Description

[0041] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0042] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0043] Figure 2 This is an exploded view of the overall structure of this utility model;

[0044] Figure 3 This is a side view of the present invention;

[0045] Figure 4This is a schematic diagram of the overall exploded structure of another roller shell (2) of this utility model;

[0046] Figure 5 This is a side view and a cross-sectional view of another type of roller shell (2) of this utility model in use.

[0047] The numbers in the diagram are as follows:

[0048] 1—Inner core of the liner roller, 11—Left half roller, 12—Right half roller, 13—Positioning component;

[0049] 2—roller shell, 21—limiting part, 22—protrusion;

[0050] 3—Fixed shaft;

[0051] 4—Stamped character code;

[0052] 5—Cigarette wrapper;

[0053] 6—Main body of the equipment. Detailed Implementation

[0054] To make the technical means, inventive features, and achieved objectives and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] Example 1

[0056] As per the instruction manual Figure 1 To the instruction manual Figure 5 An improved ZB45 packaging machine steel stamp code changing roller is shown, comprising a steel stamp code changing roller on a fixed shaft 3 passing through the steel stamp code changing roller, characterized in that: the steel stamp code changing roller comprises:

[0057] The inner core of the liner roller 1 is detachably connected and sleeved on the fixed shaft 3;

[0058] Roller shell 2 is fitted and snapped onto the inner core 1 of the liner roller.

[0059] The inner core 1 of the liner roller includes:

[0060] The left half roller 11 has two through holes.

[0061] The right half roller 12 has two internal threaded holes.

[0062] Positioning component 13 is used to connect the left half roller 11 and the right half roller 12 into a whole.

[0063] Furthermore, the left half roller 11 and the right half roller 12 each have an arc-shaped snap-fit ​​part along their length direction at the center of their non-arc-shaped end faces, which is connected to the fixed shaft 3. The diameter of the arc-shaped snap-fit ​​part is smaller than the diameter of the fixed shaft 3.

[0064] In the above-mentioned improved ZB45 hard box packaging machine steel stamp code changing shell liner roller, the left half roller 11 and the right half roller 12 are connected as one unit by using positioning part 13, and the fixed shaft 3 is tightly attached between the left half roller 11 and the right half roller 12 through the snap-fit ​​part. After tightening the positioning part 13, the inner core 1 of the liner roller is clamped to the fixed shaft 3, which restricts the longitudinal movement of the inner core 1 of the liner roller. Then, the roller shell 2 is put on the inner core 1 of the liner roller to complete the installation.

[0065] Example 2

[0066] Furthermore, limiting rings are symmetrically connected to the outer ends of the left half-roller 11 and the right half-roller 12, and the four limiting rings together limit the lateral movement of the roller shell 2 on the inner core 1 of the liner roller. In this utility model, by designing a detachable structure for the inner core 1 of the liner roller, installation and replacement are more convenient and time-saving.

[0067] In this utility model, the design of the limiting rings on the outer sides of the left half roller 11 and the right half roller 12 can achieve the lateral positioning of the roller shell 2, preventing the lateral displacement of the roller shell 2 during the printing of the steel stamp number, the cigarette pack paper conveying or the printing of the steel stamp number 4, which would cause the steel stamp number to be unclear and result in quality problems.

[0068] Example 3

[0069] Furthermore, the left half roller 11 has two through holes in the middle of its outer surface, which allow the positioning member 13 to be fully inserted. The inside of the through hole is a stepped design, which allows the end of the positioning member 13 to be limited at the step of the through hole, while the threaded column section passes out of the left half roller 11.

[0070] The positioning element 13 has an internal hexagonal groove end at one end and a threaded column at the other end, with the end diameter being larger than the diameter of the threaded column segment.

[0071] Furthermore, the roller shell 2 is a flexible structure.

[0072] Furthermore, the through holes on the left half roller 11 are symmetrically designed, with one located above the fixed shaft 3 and the other located below the fixed shaft 3.

[0073] Furthermore, the right half roller 12 has two internal threaded holes in the middle of its inner surface that correspond to the through holes of the left half roller 11. The left half roller 11 and the right half roller 12 are connected to each other by using the positioning member 13 and the fixing shaft 3 is clamped in the middle.

[0074] Furthermore, the arc-shaped locking portions of the left half roller 11 and the right half roller 12 are also provided with inward grooves at both ends.

[0075] In this invention, the positioning element 13 clamps the inner core 1 of the liner roller to the fixed shaft 3 and provides longitudinal limitation. The grooves at both ends of the arc-shaped locking parts of the left half roller 11 and the right half roller 12 can cooperate with the upper limit mechanism of the fixed shaft to achieve lateral limitation. After the roller shell 2 is installed, when it is necessary to change the contact position between the stamped code 4 and the roller shell 2, the roller shell 2 is removed, the positioning element 13 is loosened, the inner core 1 of the liner roller is rotated at a certain angle to remove the worn part, the positioning element 13 is tightened, and the roller shell 2 is put back on for continued use.

[0076] Furthermore, the roller shell 2 includes:

[0077] Roller shell body;

[0078] The limiting part 21 is connected to the inner wall of the roller shell body and has a vertical structure.

[0079] The protrusions 22 are symmetrically connected to both ends of the inner wall of the roller shell body;

[0080] The protrusions 22 at both ends are used in conjunction with the limiting rings on the inner core 1 of the liner roller to limit the roller shell 2 and restrict the lateral movement of the roller shell 2.

[0081] In this utility model, the limiting part 21 is sandwiched between the left half roller 11 and the right half roller 12, and its width is the same as the width of the gap in the middle after the left half roller 11, the right half roller 12, the positioning member 13 and the fixed shaft 3 are connected, thus restricting the longitudinal movement of the roller shell 2.

[0082] Example 4

[0083] Example 4 is the same as Examples 1-3, the only difference being that the roller shell 2 can wrap around both ends of the inner core 1 of the liner roller, such as... Figure 4-5 As shown.

[0084] In this utility model, the roller shell 2 is slightly longer than the inner core 1 of the liner roller and extends downward at both ends to present an "L-shaped" structure, which encloses the entire inner core 1 of the liner roller. The lateral positioning of the roller shell 2 is achieved through the extended portions at both ends.

[0085] In summary, a more specific embodiment of this utility model is as follows:

[0086] like Figure 2 As shown, an improved ZB45 hard box packaging machine steel stamp code changing shell liner roller includes a liner roller core 1, a roller shell 2, a fixed shaft 3, steel stamp code 4, cigarette pack paper 5, and the main body of the equipment 6.

[0087] Before use, the original steel-stamped code roller was fixed to the fixed shaft with fixing bolts. When it needs to be replaced due to wear, firstly, the fixing bolts on the original steel-stamped code roller need to be unscrewed, and the entire steel-stamped code roller needs to be removed and stored in the fixed position. Then, the positioning piece 13 is passed through the through hole on the left half roller 11 and connected to the right half roller 12. At this time, the positioning piece 13 is not tightened. Then, the connected left half roller 11 and right half roller 12 are passed through one end of the fixed shaft 3, and the other end of the fixed shaft 3 is fixed to the main body 6 of the equipment. The fixed shaft 3 is located in the enclosure structure formed by the left half roller 11, the right half roller 12 and the two positioning pieces 13. Gradually tighten the upper and lower positioning pieces 13 so that the arc-shaped locking part between the left half roller 11 and the right half roller 12 is tightly held on the fixed shaft 3. At this time, there is a gap between the left half roller 11 and the right half roller 12. The integral inner core 1 of the liner roller is fitted into grooves at both ends of the arc-shaped locking part through an annular structure on the fixed shaft 3, thereby limiting the lateral movement of the inner core 1. Finally, the roller shell 2 is directly sleeved and locked onto the inner core 1 of the liner roller. The roller shell 2 is adjusted so that the upper limit part 21 of the roller shell 2 is embedded in the gap between the left half roller 11 and the right half roller 12, and the protrusion 22 on the roller shell 2 is embedded in the limiting rings symmetrically connected at both ends of the left half roller 11 and the right half roller 12. The limiting part 21 restricts the longitudinal movement of the roller shell 2, and the protrusion 22 restricts the lateral movement of the roller shell 2.

[0088] Another installation method involves the operator manually pressing the arc-shaped locking parts of the left half roller 11 and the right half roller 12 tightly against the fixed shaft 3, and then using the positioning part 13 to connect and fix the left half roller 11 and the right half roller 12. The remaining operation steps are the same as described above and will not be repeated here. After the utility model is installed, it can be used.

[0089] During operation: After the cigarette pack paper 5 from the previous station arrives at the printing station, it moves and is conveyed between the steel stamping roller and the steel stamping code 4. Once the cigarette pack paper 5 reaches the marking position, the steel stamping code 4 moves downward, printing the code onto the fixed position on the cigarette pack paper 5. Because of the use of a soft roller shell 2, wear between the steel stamping roller and the steel stamping code 4 is reduced, minimizing the loss of spare parts while ensuring clear stamping numbers.

[0090] When adjustment is needed: If the fixed contact position on the roller shell 2 is severely worn, affecting the printing quality of the steel stamp number, remove the roller shell 2, loosen the positioning part 13, rotate the inner core 1 of the liner roller at a certain angle until the worn area is avoided, tighten the positioning part 13, put the roller shell 2 on, and adjust the roller shell 2 to the corresponding limit position.

[0091] When replacement is required: If the roller shell 2 is severely worn and needs to be replaced, simply remove the damaged roller shell 2 from the inner core 1 of the liner roller, replace it with a new roller shell 2, and adjust the roller shell 2 to the corresponding limit position; if the entire steel stamp code liner roller needs to be replaced, first remove the roller shell 2, loosen and remove the positioning part 13, separate the left half roller 11 and the right half roller 12 and remove them, and then replace the steel stamp code liner roller according to the above operation.

[0092] Because the roller shell 2 is made of soft material, it can be disassembled using tools such as scissors when it is severely worn.

[0093] In this utility model, the connection is either a fixed connection or a detachable connection. The fixed connection is either a welded connection or a directly machined integral structure, while the detachable connection is either an internal or external threaded connection, a snap-fit ​​connection, or a plug-in structure connection.

[0094] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An improved steel stamp code changing roller for a ZB45 packaging machine, comprising a steel stamp code changing roller on a fixed shaft (3) passing through the steel stamp code changing roller, characterized in that: The steel stamp code roller includes: The inner core of the liner roller (1) is detachably connected and sleeved on the fixed shaft (3); Roller shell (2), the roller shell (2) is sleeved and snapped onto the inner core (1) of the liner roller; The inner core (1) of the liner roller includes: The left half roller (11) has two through holes. The right half roller (12) has two internal threaded holes. Positioning element (13) is used to connect the left half roller (11) and the right half roller (12) into a whole.

2. The improved ZB45 packaging machine steel stamp code changing liner roller according to claim 1, characterized in that: The left half roller (11) and the right half roller (12) each have an arc-shaped snap-fit ​​part along their length direction at the middle of their non-arc end faces, which is connected to the fixed shaft (3). The diameter of the arc-shaped snap-fit ​​part is smaller than the diameter of the fixed shaft (3).

3. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 1, characterized in that: Limiting rings are symmetrically connected to the outer ends of the left half roller (11) and the right half roller (12), and the four limiting rings together limit the lateral movement of the roller shell (2) on the inner core (1) of the liner roller.

4. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 3, characterized in that: The left half roller (11) has two through holes in the middle of its outer surface, which allow the positioning member (13) to be fully inserted. The inside of the through hole is a stepped design, which allows the end of the positioning member (13) to be limited at the step of the through hole, while the threaded column section passes out of the left half roller (11). The positioning element (13) has an internal hexagonal groove end at one end and a threaded column at the other end, with the end diameter being larger than the diameter of the threaded column segment.

5. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 1, characterized in that: The roller shell (2) is a flexible structure.

6. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 1, characterized in that: The through holes on the left half roller (11) are symmetrically designed, with one located above the fixed shaft (3) and the other located below the fixed shaft (3).

7. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 1, characterized in that: The right half roller (12) has two internal threaded holes in the middle of its inner surface, which correspond to the through holes of the left half roller (11). The left half roller (11) and the right half roller (12) are connected to each other by using a positioning member (13) and the fixing shaft (3) is clamped in the middle.

8. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 2, characterized in that: The arc-shaped locking parts of the left half roller (11) and the right half roller (12) are also provided with grooves at both ends.

9. An improved steel-printed code changing roller for a ZB45 packaging machine according to claim 1, characterized in that: The roller shell (2) includes: Roller shell body; The limiting part (21) is symmetrically connected to the inner wall of the roller shell body. The limiting part (21) is a vertical structure. The protrusions (22) are symmetrically connected to both ends of the inner wall of the roller shell body; The protrusions (22) at both ends are used in conjunction with the limiting rings on the inner core (1) of the liner roller to limit the roller shell (2) and restrict the lateral movement of the roller shell (2).

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