A creasing device for carton production

Abstract

The utility model relates to paper box production equipment technical field, concretely is a kind of indentation device for packaging paper box production, indentation machine body, lower indentation roller, bearing seat, upper indentation roller, sliding block, adjusting lead screw, driving mechanism, driving worm wheel, driving worm, operating hand wheel etc., pass through bearing seat and promote the stable lifting of upper indentation roller, force the fine change of roller interval spacing, the transmission ratio characteristics of worm wheel worm pair will hand wheel larger corner conversion be screw tiny displacement, realize the fine adjustment of interval, simultaneously, the self-locking characteristics of worm wheel worm prevent the interval change caused by vibration during indentation process, ensure pressure stability, to greatly reduce the downtime of single production, indentation quality consistency significantly improves, avoid the problem of paper box swelling or strength reduction due to improper pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of carton production equipment, in particular to a creasing device for producing packaging cartons. Background Art

[0002] Packaging cartons are made of corrugated cardboard. Its unique "liner-corrugating medium-liner" composite structure can provide three guarantees of accommodating, protecting and facilitating transportation for various goods, and becomes a key carrier for brand promotion and information transmission by virtue of its printable surface. Packaging carton production enterprises can absorb huge raw paper capacity in the upstream, and also provide customized, cost-effective packaging solutions in the downstream. Combined with the increasingly perfect recycling system, the production of packaging cartons promotes the efficient recycling of resources and contributes huge environmental value to the society.

[0003] When producing and processing packaging cartons, raw paper is first pressed into corrugated cardboard with different corrugated types, then brand printing, creasing and grooving that determine the final shape are completed in sequence, and finally the box body is joined by nailing or bonding to become a finished product that can be folded and transported. In this series of processes, the creasing machine works by applying controllable pressure to the cardboard through a pair of precisely matched upper and lower creasing rollers, so as to form a clear stress guide line at the position that needs folding, which is easy to bend and not easy to break, thereby ensuring that the finished carton has excellent properties such as distinct edges and corners and square box body.

[0004] However, when processing carton boards with different thicknesses in different batches, operators must adjust the roller spacing between the creasing rollers of the packaging carton creasing machine by tedious methods such as rotating handwheels or manually increasing or decreasing gaskets. The whole process is not only time-consuming and laborious, but also highly dependent on the operator's personal experience and hand feel, and lacks objective and quantitative precision feedback, which directly drags down production efficiency. Once order change production is carried out, it must be accompanied by long shutdown debugging, which greatly reduces the comprehensive utilization rate of equipment. More seriously, inconvenient adjustment easily leads to precision out of control: if the spacing is too large, the carton will be difficult to fold smoothly on the automatic packaging line, resulting in bulging, loose covering and even cracking of the box body; if the spacing is too small and the pressure is excessive, the edge compressive strength and bursting resistance of the carton will be seriously weakened, resulting in great hidden quality risks. Summary of the Utility Model

[0005] To overcome the shortcomings of existing technologies, the technical solution adopted by this utility model to solve its technical problem is as follows: A creasing device for producing packaging cartons, comprising a creasing machine body, with a lower creasing roller rotatably connected to a drive motor above the creasing machine body; characterized in that: an upper creasing roller is slidably connected to the creasing machine body above the lower creasing roller via bearing seats at both ends; a sliding block is fixedly connected to the bottom of the bearing seats; the sliding block is sleeved on an adjusting screw arranged vertically and rotatably connected to the side wall of the creasing machine body; the adjusting screw adjusts the height of the sliding block through a drive mechanism, thereby adjusting the roller spacing between the upper and lower creasing rollers.

[0006] Preferably, the drive mechanism includes: A drive worm gear is sleeved on the bottom of the adjusting screw and fixedly connected thereto; A drive worm gear is provided, and the drive worm wheel meshes with the drive worm gear for transmission. One end of the drive worm gear is fixedly connected to an operating handwheel that extends out of the embossing machine body.

[0007] Preferably, the drive worm is made of hardened alloy steel, and the teeth of the drive worm wheel are made of wear-resistant tin bronze. The transmission ratio of the worm gear pair formed by the two is between 15:1 and 30:1.

[0008] Preferably, the adjusting screw is a trapezoidal screw, the sliding block has an internal thread that matches the external thread of the adjusting screw, and the thread helix angle of the adjusting screw is less than its equivalent friction angle.

[0009] Preferably, the embossing machine body is further equipped with a guiding mechanism, which is at least one set of linear guide rail pairs. The sliding block is fixedly connected to the slider of the linear guide rail pair, and the guide rail of the linear guide rail pair is fixed in the embossing machine body.

[0010] Preferably, the embossing machine body is also equipped with a digital display, which is integrated into the control panel of the embossing machine and has functions such as displaying the absolute and relative values ​​of the roller spacing, unit conversion, and preset value recall.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a creasing device for packaging carton production, which has the following beneficial effects: The upper creasing roller is smoothly raised and lowered by the bearing housing, which forces the roller spacing to change precisely. The large transmission ratio of the worm gear pair converts the large rotation angle of the handwheel into a small displacement of the lead screw, realizing the fine adjustment of the spacing. At the same time, the self-locking characteristic of the worm gear prevents the spacing change caused by vibration during the creasing process, ensuring pressure stability. This greatly reduces downtime when changing orders, significantly improves the consistency of creasing quality, and avoids problems such as carton bulging or reduced strength caused by improper pressure. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the drive mechanism and related structures of this utility model; Figure 3 for Figure 2 Enlarged view of point A.

[0013] Explanation of reference numerals in the attached figures: 1. Embossing machine body; 2. Lower embossing roller; 3. Bearing seat; 4. Upper embossing roller; 5. Sliding block; 6. Adjusting screw; 7. Drive mechanism; 8. Drive worm gear; 9. Drive worm; 10. Operating handwheel; 11. Linear guide pair; 12. Digital display. Detailed Implementation

[0014] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0015] Combination Figure 1-3 As shown in the figure, this utility model provides a creasing device for producing packaging cartons, including a creasing machine body 1. A lower creasing roller 2, which is rotatably connected to a drive motor, is mounted on the upper part of the creasing machine body 1. The device is characterized in that an upper creasing roller 4 is slidably connected to the creasing machine body 1 above the lower creasing roller 2 via bearing seats 3 at both ends. The bottom of each bearing seat 3 is fixedly connected to a sliding block 5. The sliding block 5 is mounted on an adjusting screw 6 arranged vertically and rotatably connected to the side wall of the creasing machine body 1. The adjusting screw 6 adjusts the height of the sliding block 5 via a drive mechanism 7, thereby adjusting the roller spacing between the upper creasing roller 4 and the lower creasing roller 2.

[0016] In one embodiment of this utility model, the driving mechanism 7 includes: A drive worm gear 8 is sleeved on the bottom of the adjusting screw 6 and fixedly connected thereto; The drive worm 9 is driven by the drive worm wheel 8, which meshes with the drive worm 9 for transmission. One end of the drive worm 9 is fixedly connected to an operating handwheel 10 that extends out of the embossing machine body 1.

[0017] In one embodiment of this utility model, the drive worm 9 is made of hardened alloy steel, and the teeth of the drive worm wheel 8 are made of wear-resistant tin bronze. The transmission ratio of the worm wheel and worm pair formed by the two is between 15:1 and 30:1.

[0018] In the production of packaging cartons, when the thickness of the cardboard changes and the roller spacing between the upper creasing roller 4 and the lower creasing roller 2 of the creasing machine needs to be adjusted, the operator turns the operating handwheel 10 to drive the worm gear 9 to rotate. The meshing transmission between the worm gear 9 and the drive worm wheel 8 drives the adjusting screw 6, which is fixedly connected to the drive worm wheel 8, to rotate synchronously. This causes the sliding block 5, which is sleeved on the screw, to move precisely in the vertical direction under the drive of the screw thread. Through the bearing seat 3, the upper creasing roller 4 is pushed to rise and fall smoothly, forcing a fine change in the roller spacing. The large transmission ratio characteristic of the worm gear pair converts the large rotation angle of the operating handwheel 10 into a small displacement of the adjusting screw 6, realizing the fine adjustment of the roller spacing. At the same time, the self-locking characteristic of the worm gear prevents the spacing change caused by vibration during the creasing process, ensuring pressure stability. This significantly reduces downtime during production changes, significantly improves the consistency of creasing quality, and avoids problems such as improper roller pressure caused by incorrect adjustment of the roller spacing between the upper creasing roller 4 and the lower creasing roller 2, which can lead to bulging or reduced strength of the carton.

[0019] In one embodiment of this utility model, the adjusting screw 6 is a trapezoidal screw, the sliding block 5 has an internal thread that matches the external thread of the adjusting screw 6, and the thread helix angle of the adjusting screw 6 is less than its equivalent friction angle.

[0020] As one embodiment of the present invention, the embossing machine body 1 is further equipped with a guiding mechanism, which is at least one set of linear guide rail pairs 11. The sliding block 5 is fixedly connected to the slider of the linear guide rail pairs 11, and the guide rail of the linear guide rail pairs 11 is fixed inside the embossing machine body 1.

[0021] During operation, to address the combined problems of insufficient screw precision, poor sliding stability, and low self-locking reliability in the adjustment process of the indentation device, this embodiment achieves precise and stable spacing control through the coordinated design of a trapezoidal screw and a linear guide. The adjusting screw 6 is a trapezoidal screw with a thread helix angle smaller than the equivalent friction angle, and the sliding block 5 has an internal thread that matches it. On the other hand, at least one set of linear guide pairs 11 is installed inside the indentation machine body 1, with its slider fixedly connected to the sliding block 5. The guide rail is fixed inside the body, so when the drive mechanism 7 drives the adjusting screw 6 to rotate, the inclined structure of the trapezoidal thread converts the rotational force into the vertical thrust of the sliding block 5, forcing the upper indentation roller 4 to rise and fall smoothly. Since the thread helix angle is smaller than the friction angle, the screw automatically generates a self-locking effect when stationary, effectively resisting the recoil force during the indentation process. The synchronously cooperating linear guide pairs 11 constrain the sliding block 5 to move only in the vertical direction, eliminating the tendency of lateral sway. The self-locking characteristic of the trapezoidal thread keeps the roller spacing stable under dynamic load, while the rigid guidance of the linear guide eliminates the displacement error caused by the gap.

[0022] As one embodiment of this utility model, the embossing machine body 1 is also equipped with a digital display 12, which is integrated into the control panel of the embossing machine and has functions such as displaying the absolute and relative values ​​of the roller spacing, unit conversion, and preset value recall.

[0023] During operation, when the operator adjusts the roller spacing through the drive mechanism 7, the digital display 12 collects the number of rotations of the lead screw or the data from the linear displacement sensor in real time. The built-in algorithm converts the mechanical displacement into an intuitive spacing value. When switching between different thicknesses of cardboard, the operator can directly call the preset parameters, forcing the system to automatically match the target spacing value, thereby enabling novice operators to quickly reach the standard operating level and significantly reducing training costs.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A creasing device for producing packaging cartons, comprising a creasing machine body (1), wherein a lower creasing roller (2) connected to a drive motor is rotatably connected above the creasing machine body (1); characterized in that: The upper embossing roller (4) is slidably connected to the embossing machine body (1) above the lower embossing roller (2) via bearing seats (3) at both ends. The bottom of the bearing seat (3) is fixedly connected to a sliding block (5). The sliding block (5) is sleeved on an adjusting screw (6) arranged vertically and rotatably connected to the side wall of the embossing machine body (1). The adjusting screw (6) adjusts the height of the sliding block (5) through a drive mechanism (7), thereby adjusting the roller spacing between the upper embossing roller (4) and the lower embossing roller (2).

2. The creasing device for producing packaging cartons according to claim 1, characterized in that: The drive mechanism (7) includes: A drive worm gear (8) is sleeved on the bottom of the adjusting screw (6) and fixedly connected thereto; The drive worm (9) is meshed with the drive worm wheel (8) for transmission, and one end of the drive worm (9) is fixedly connected to an operating handwheel (10) that extends out of the embossing machine body (1).

3. The creasing device for producing packaging cartons according to claim 2, characterized in that: The drive worm (9) is made of hardened alloy steel, and the teeth of the drive worm wheel (8) are made of wear-resistant tin bronze. The transmission ratio of the worm wheel and worm pair formed by the two is between 15:1 and 30:

1.

4. The creasing device for producing packaging cartons according to claim 1, characterized in that: The adjusting screw (6) is a trapezoidal screw, and the sliding block (5) has an internal thread that matches the external thread of the adjusting screw (6), and the thread helix angle of the adjusting screw (6) is less than its equivalent friction angle.

5. The creasing device for producing packaging cartons according to claim 1, characterized in that: The embossing machine body (1) is also equipped with a guide mechanism, which is at least one set of linear guide rail pairs (11). The sliding block (5) is fixedly connected to the slider of the linear guide rail pair (11), and the guide rail of the linear guide rail pair (11) is fixed inside the embossing machine body (1).

6. The creasing device for producing packaging cartons according to claim 2, characterized in that: The embossing machine body (1) is also equipped with a digital display (12), which is integrated into the control panel of the embossing machine and has functions such as displaying the absolute and relative values ​​of the roller spacing, unit conversion, and preset value recall.

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