Steel knife structure for producing disposable polyethylene package protective apron

Abstract

The invention discloses a steel knife structure for producing a disposable polyethylene package protective apron. The steel knife structure comprises a base, a lower inclined plate, an upper inclined plate, a nitriding steel plate, a steel blade clamping plate, a steel blade and an adjusting guide assembly. The lower inclined plate is fixedly installed on the base, the upper inclined plate slides along the inclined face of the lower inclined plate, and the nitriding steel plate is arranged on the upper surface of the upper inclined plate. The steel blade is detachably mounted through a steel blade clamping plate and is opposite to the nitriding steel plate, and the steel blade clamping plate is driven by an up-and-down reciprocating type driving device to do up-and-down reciprocating motion; the adjusting and guiding assembly comprises an adjusting connecting block, an adjusting screw, an adjusting nut, a guiding connecting block, a guiding block and the like, and height fine adjustment and movement guiding of the nitriding steel plate can be achieved. A stamping cutting mode is adopted, cutting is thorough, material films are free of adhesion, a nitrided steel plate is high in abrasion resistance, a steel blade is convenient to replace, the device is suitable for material films of different thicknesses, the structure is simple, the maintenance cost is low, the production efficiency and the product quality can be improved, and the device is suitable for large-scale production of disposable polyethylene roll protection aprons.

Description

Technical Field

[0001] This invention belongs to the technical field of disposable plastic product processing equipment, and in particular relates to a steel knife structure for the production of disposable polyethylene roll protective aprons. Background Technology

[0002] Disposable polyethylene roll protective aprons have become essential items for homes, communities, schools, and other places due to their outstanding advantages such as simple production, convenient use, and low cost. Market demand is strong, and some products are exported to international markets such as Europe, America, Singapore, and Australia.

[0003] Currently, the traditional production process for disposable polyethylene roll protective aprons generally uses a roller-cutting method. Its core structure consists of a circular steel shaft as the base, where two folded layers of polyethylene film slide between the roller and the shaft. The pressure from the raised blades as the roller rotates partially breaks the film, and waste material is removed by airflow before the apron is finally rolled up. However, this traditional process has significant drawbacks: the roller and the base shaft engage in a hard-on rolling extrusion, which easily dulls the blades during continuous operation, causing the film to break. To solve this problem, frequent machine stops are required to sharpen or replace the rollers, severely impacting production efficiency and significantly increasing replacement costs. If the roller pressure is increased to force cutting, the film will be "squeezed apart" by the dulled blades, causing the two layers to stick together at the cut. This requires manual unfolding of the two layers when wearing the apron, easily tearing the headband and affecting product performance, even rendering the product unusable, severely restricting product quality and market competitiveness.

[0004] Therefore, developing a steel blade structure that is simple in structure, durable, easy to replace, and provides stable cutting quality has become a key requirement for solving the pain points of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a steel blade structure for the production of disposable polyethylene roll protective aprons, which solves the problems of easy dulling of the blade, incomplete cutting, and complicated blade replacement in the traditional rolling cutter process, and achieves efficient, precise and stable cutting in the production of protective aprons, thereby reducing production costs and enhancing the market competitiveness of the product.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a steel blade structure for producing disposable polyethylene roll protective aprons, comprising a base, a lower inclined plate on the upper surface of the base, and an upper inclined plate slidably mounted on the inclined surface of the lower inclined plate; a nitrided steel plate on the upper surface of the upper inclined plate, a steel blade clamping plate above the nitrided steel plate, and a steel blade detachably mounted on the steel blade clamping plate; an adjusting connecting block is jointly mounted on the base and the side wall of the lower inclined plate by fixing screw A; an adjusting straight groove is opened at the upper end of the adjusting connecting block, and an adjusting screw is inserted into the adjusting straight groove; one end of the adjusting screw is threaded to the side wall of the upper inclined plate, and adjusting nuts are threaded to the peripheral sides of the adjusting screws on both sides of the adjusting connecting block; two sets of guide connecting blocks are fixed to the side of the lower inclined plate by fixing screw B, and a guide straight groove is provided at the upper end of the guide connecting block; a guide block is fixed to one side of the nitrided steel plate by fixing screw C, and guide cylindrical pins matching the guide straight groove are fixed on both sides of the guide block.

[0007] In one embodiment, the shape and size of the adjusting slot are adapted to the adjusting screw, and the adjusting slot and the adjusting screw cooperate with each other.

[0008] In one embodiment, the lower inclined plate surface is disposed opposite to the upper inclined plate surface, and the upper inclined plate surface slides along the lower inclined plate surface.

[0009] In one embodiment, the steel blade clamping plate includes a clamping plate base and a fixing limiting plate. The clamping plate base has a contoured blade groove, and a steel blade is fixedly installed in the contoured blade groove of the clamping plate base by the fixing limiting plate. The fixing limiting plate and the clamping plate base are fixedly connected by locking screws.

[0010] In one embodiment, the steel blade clamp is mounted on the output end of a reciprocating drive device, which is a cylinder or an electric push rod. The reciprocating motion of the cylinder or the electric push rod drives the steel blade clamp to move up and down.

[0011] In one embodiment, the nitrided steel plate is positioned opposite to the steel blade.

[0012] In one embodiment, the shape and size of the guide cylindrical pin are adapted to the guide straight groove, and the guide cylindrical pin and the guide straight groove are in sliding fit.

[0013] The present invention has the following beneficial effects: This invention uses a stamping cutting method to replace the traditional rolling extrusion cutting of a roller cutter. The steel blade and nitrided steel plate work together to cut more thoroughly, avoiding the problem of material film "squeezing off" and sticking at the die-cutting site, thus improving the performance of the product. The nitrided steel plate in this invention has high strength and high wear resistance, which can effectively reduce the wear of steel blades and extend the service life of steel blades. Compared with traditional hobs, it reduces the frequency of sharpening and changing blades. In this invention, the steel blade adopts a detachable installation structure and is fixed by locking screws and a fixing limit plate. When replacing it, there is no need to disassemble the entire steel blade structure, which simplifies the operation, saves blade replacement time, and improves production efficiency. This invention enables fine-tuning of the height of nitrided steel plates by adjusting the connecting block, adjusting screw, and adjusting nut, adapting to the cutting needs of polyethylene film of different thicknesses, and thus having a wider range of applications. The invention features a simple overall structure, few parts, easy assembly, low maintenance costs, and is suitable for large-scale production and application.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional schematic diagram of a steel knife structure used in the production of disposable polyethylene roll protective aprons; Figure 2 Left view of a steel knife structure used in the production of disposable polyethylene roll protective aprons; Figure 3 This is a schematic diagram of the assembly of the steel blade and the steel blade clamping plate in this invention; Figure 4 This is a left view and a cross-sectional structural diagram of a traditional hobbing cutter device.

[0017] The attached diagram lists the components represented by each number as follows: 1. Base; 2. Lower inclined plate; 3. Upper inclined plate; 4. Nitrided steel plate; 5. Steel blade clamping plate; 6. Steel blade; 7. Fixing screw A; 8. Adjusting connecting block; 9. Adjusting screw; 10. Adjusting nut; 11. Fixing screw B; 12. Guide connecting block; 13. Guide straight groove; 14. Fixing screw C; 15. Guide block; 16. Guide cylindrical pin; 51. Clamping plate base plate; 52. Fixing limit plate; 53. Contouring blade groove; 54. Locking screw; 17. Hob; 18. Nitrided roller; 19. Eccentric seat; 20. Adjusting screw; 21. Blade line. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1 Please see Figures 1-4 As shown, this invention relates to a steel knife structure for the production of disposable polyethylene roll protective aprons, comprising a base 1, a lower inclined plate 2 fixedly mounted on the upper surface of the base 1, an upper inclined plate 3 slidably mounted on the inclined surface of the lower inclined plate 2, the inclined surfaces of the lower inclined plate 2 and the upper inclined plate 3 being opposite to each other to ensure that the upper inclined plate 3 can slide smoothly along the inclined surface of the lower inclined plate 2; a nitrided steel plate 4 fixedly mounted on the upper surface of the upper inclined plate 3, the nitrided steel plate 4 having the characteristics of high strength and high wear resistance, and can be used as a cutting support surface; a steel blade clamping plate 5 is provided above the nitrided steel plate 4, and a steel blade 6 is detachably mounted on the steel blade clamping plate 5, the nitrided steel plate 4 and the steel blade 6 being opposite to each other to ensure precise alignment during cutting; The base 1 and the side wall of the lower inclined plate 2 are jointly installed with an adjusting connecting block 8 by fixing screw A7. The upper end of the adjusting connecting block 8 is provided with an adjusting straight groove, and an adjusting screw 9 is inserted in the adjusting straight groove. The shape and size of the adjusting straight groove are adapted to the adjusting screw 9. The two cooperate with each other. One end of the adjusting screw 9 is threaded to the side wall of the upper inclined plate 3. The adjusting screw 9 on both sides of the adjusting connecting block 8 is threaded with adjusting nuts 10. By loosening or tightening the adjusting nuts 10, the adjusting screw 9 can be moved in the adjusting straight groove, thereby pushing the upper inclined plate 3 to slide along the inclined surface of the lower inclined plate 2, so as to realize the fine adjustment of the height of the nitrided steel plate 4 to adapt to the cutting requirements of different thicknesses of film. Two sets of guide connecting blocks 12 are fixed to the side of the lower inclined plate 2 by fixing screws B11. The two sets of guide connecting blocks 12 are symmetrically arranged. The upper end of the guide connecting block 12 is provided with a guide straight groove 13. A guide block 15 is fixed to one side of the nitriding steel plate 4 by fixing screws C14. Guide cylindrical pins 16 matching the guide straight groove 13 are fixed on both sides of the guide block 15. The shape and size of the guide cylindrical pins 16 are adapted to the guide straight groove 13. The two slide together. When the nitriding steel plate 4 moves with the upper inclined plate 3, the guide cylindrical pins 16 slide along the guide straight groove 13, which plays a guiding and limiting role, ensuring the stability of the nitriding steel plate 4 during the movement process.

[0022] Furthermore, the steel blade clamp 5 includes a clamp base plate 51 and a fixing limiting plate 52. The clamp base plate 51 has a contoured blade groove 53, the shape of which matches the steel blade 6. The steel blade 6 is fixedly installed in the contoured blade groove 53 of the clamp base plate 51 by the fixing limiting plate 52. The fixing limiting plate 52 and the clamp base plate 51 are fixedly connected by locking screws 54. The steel blade 6 can be quickly replaced by removing the locking screws 54, making the operation convenient.

[0023] Furthermore, the steel blade clamp 5 is installed on the output end of the reciprocating drive device. The reciprocating drive device uses a cylinder or an electric push rod. Through the reciprocating motion of the cylinder or the electric push rod, the steel blade clamp 5 is driven to move up and down, thereby driving the steel blade 6 to move up and down, realizing the stamping and cutting of the material film. Compared with the rolling extrusion cutting of the traditional roller cutter, the stamping and cutting method is more efficient and the wear of the steel blade 6 is less.

[0024] Example 2 Please see Figures 1-4 As shown, this embodiment is an assembly method for a steel knife structure used in the production of disposable polyethylene roll protective aprons, including the following steps: S1. Securely install the lower inclined plate 2 on the upper surface of the base 1, ensuring a firm installation; S2. Slide the upper inclined plate 3 onto the inclined surface of the lower inclined plate 2 so that the two inclined surfaces fit tightly together to ensure smooth sliding. S3. Install the adjusting connecting block 8 at the connection between the base 1 and the lower inclined plate 2 using the fixing screw A7. Insert the adjusting screw 9 into the adjusting straight slot of the adjusting connecting block 8 and thread one end of the adjusting screw 9 to the side wall of the upper inclined plate 3. Install adjusting nuts 10 on the adjusting screws 9 on both sides of the adjusting connecting block 8 respectively. S4. Fix the two sets of guide connecting blocks 12 symmetrically on the side of the lower inclined plate 2 by fixing screw B11, and fix the guide block 15 on one side of the nitrided steel plate 4 by fixing screw C14, ensuring that the guide cylindrical pins 16 on both sides of the guide block 15 correspond to and cooperate with the guide straight groove 13 of the guide connecting block 12, and fix the nitrided steel plate 4 on the upper surface of the upper inclined plate 3. S5. Place the steel blade 6 in the contoured blade groove 53 of the clamping plate base plate 51 of the steel blade clamping plate 5, and fix the steel blade 6 by fixing the limiting plate 52 and locking screw 54 to complete the assembly of the steel blade clamping plate 5 and the steel blade 6. S6. Install the assembled steel blade clamp 5 on the output end of the reciprocating drive device (cylinder or electric push rod), ensuring that the steel blade 6 is positioned opposite the nitrided steel plate 4.

[0025] Example 3 Please see Figures 1-4 As shown, this embodiment illustrates a method for using a steel knife structure in the production of disposable polyethylene roll protective aprons, comprising the following steps: S1. Adjust the height of the nitriding steel plate 4 according to the thickness of the polyethylene film to be cut: Loosen the adjusting nuts 10 on both sides of the adjusting connecting block 8, push the adjusting screw 9 to move in the adjusting straight groove, drive the upper inclined plate 3 to slide along the inclined surface of the lower inclined plate 2, and the guide cylindrical pins 16 on both sides of the guide block 15 to move along the guide straight groove 13 of the guide connecting block 12, keep the nitriding steel plate 4 moving vertically up and down, and then adjust the height of the nitriding steel plate 4. After adjusting to the appropriate position, tighten the adjusting nuts 10 on both sides to fix the height of the nitriding steel plate 4. S2. Start the reciprocating drive device to drive the steel blade clamp 5 to move the steel blade 6 up and down in a reciprocating motion. S3. The two layers of polyethylene film after being folded are conveyed between the nitrided steel plate 4 and the steel blade 6. When the steel blade 6 moves downward, it cooperates with the nitrided steel plate 4 to punch and cut the film. After the partial cutting is completed, the steel blade 6 returns to its original position and the film continues to be conveyed to enter the next cutting cycle. S4. During the cutting process, when the steel blade 6 is worn and needs to be replaced, turn off the drive device, remove the locking screw 54 on the steel blade clamp 5, remove the fixing limit plate 52, replace the new steel blade 6, and then fix it again with the fixing limit plate 52 and locking screw 54. The blade replacement process is quick and convenient.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A steel knife structure for producing disposable polyethylene roll protective aprons, comprising a base (1), characterized in that: The bottom (1) upper surface is provided with a lower inclined plate (2), the lower inclined plate (2) is provided with an upper inclined plate (3) on the inclined surface, the upper inclined plate (3) upper surface is provided with a nitriding steel plate (4), the nitriding steel plate (4) is provided with a steel blade clamping plate (5) above, the steel blade clamping plate (5) is detachably mounted with a steel blade (6), the bottom (1) and the lower inclined plate (2) side wall are jointly installed with an adjusting connecting block (8) through a fixed screw A (7), the adjusting connecting block (8) upper end is provided with an adjusting straight notch, the adjusting screw (9) is inserted into the adjusting straight notch, one end of the adjusting screw (9) is threadedly fixed with the side wall of the upper inclined plate (3), the adjusting screw (9) on both sides of the adjusting connecting block (8) is threadedly connected with an adjusting nut (10); the lower inclined plate (2) side is fixed with two groups of guide connecting blocks (12) through a fixed screw B (11), the guide connecting block (12) upper end is provided with a guide straight notch (13), one side of the nitriding steel plate (4) is fixed with a guide block (15) through a fixed screw C (14), the guide block (15) both sides are fixed with a guide cylindrical pin (16) matched with the guide straight notch (13).

2. A steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, characterized in that, The shape and size of the adjusting straight notch are adapted to the adjusting screw (9), and the adjusting straight notch and the adjusting screw (9) are matched with each other.

3. The steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, wherein The lower inclined plate (2) inclined surface is oppositely arranged with the upper inclined plate (3) inclined surface, and the upper inclined plate (3) inclined surface is slidably matched along the lower inclined plate (2) inclined surface.

4. The steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, wherein The steel blade clamping plate (5) comprises a clamping plate base plate (51) and a fixed limiting plate (52), the clamping plate base plate (51) is provided with a profiled blade groove (53), and the steel blade (6) is fixedly installed in the profiled blade groove (53) of the clamping plate base plate (51) through the fixed limiting plate (52).

5. The steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, wherein The steel blade clamping plate (5) is installed on the output end of the up-down reciprocating driving device, the up-down reciprocating driving device adopts a gas cylinder or an electric push rod, and the up-down reciprocating driving device drives the steel blade clamping plate (5) to move up and down through reciprocating movement of the gas cylinder or the electric push rod.

6. The steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, wherein The nitriding steel plate (4) is oppositely arranged with the steel blade (6).

7. The steel blade structure for producing a disposable polyethylene roll- packed protective apron according to claim 1, wherein The shape and size of the guide cylindrical pin (16) are adapted to the guide straight notch (13), and the guide cylindrical pin (16) and the guide straight notch (13) are slidably matched.

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