Ring cutting knife and paper box ring cutting device
By setting inclined holes and negative ion generators on the ring-shaped knife body of the circumferential knife, the problems of overheating, vibration and shortening of service life caused by slow heat dissipation and dust adhesion of the circumferential knife are solved, and better heat dissipation effect is achieved. Longer service life and higher circumcision quality.
Patent Information
- Application Number
- CN202411701507.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-02-21
AI Technical Summary
When existing circumcision cutting knives are circumcised with paper and plastic packaging boxes, due to the small thickness of the material and the slow heat dissipation, it is easy to overheat the knife body, expand thermally, increase vibration, shorten service life, and dust adhesion leads to the formation of black circles, contaminating the product.
Design an annular knife body with oblique holes coaxially on both sides. The projection line of the central axis of the inclined hole is perpendicular to the diameter projection line of the knife body passing through the center point of the inclined hole. Through this structure, air can rotate during the process of the knife body. The middle flows through the inclined holes, taking away heat and achieving rapid heat dissipation. In addition, the negative ion generator eliminates static electricity from the knife body and reduces dust adhesion.
It improves the heat dissipation effect of the circumcision knife, reduces temperature and vibration, extends the service life, and avoids dust adhesion and carbonization, improving the circumcision quality.
Smart Images
Figure CN119489585A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a paper-plastic packaging box production device, in particular to a circular cutting knife and a paper box circular cutting device. Background Art
[0002] In the production process of paper-plastic packaging boxes, it is necessary to cut off the excess scraps. The specific method is as follows: Figure 1 As shown, a fixing fixture 300 is arranged inside the paper-plastic packaging box 200 to fix the paper-plastic packaging box 200, and then the circular cutter 400 is driven by the driving motor 500 to cut off the scraps of the paper-plastic packaging box 200 from the outside. In the process of circular cutting, since the thickness of the paper-plastic packaging box 200 is very small, the circular cutter 400 will come into contact with the fixing fixture 300 if it is not careful, and then the circular cutter 400 or the fixing fixture 300 will be damaged, which requires extremely high quality of the circular cutter 400 itself. The existing circular cutter is a circular tungsten steel knife, which has the following disadvantages: 1. The heat dissipation of the knife body material is slow, so that the temperature of the knife body is relatively high. After the knife body is overheated, the thermal expansion is obvious, and the diameter becomes larger. Under the same feed distance, the knife body is easily cut into the fixing fixture after thermal expansion; 2. Under high temperature operation, the heat will be transferred to the rotating shaft, so that the strength of the knife body and the rotating shaft will change, and then it is easy to vibrate during circular cutting, shortening the service life. 3. When the cutter body is cutting the material in a ring, the material will produce dust. The dust will adhere to the upper surface edge of the cutter body and easily carbonize into a black circle near the blade under the action of high temperature. When cutting a white carton in a ring, a black cutting mark will be left on the white carton, making the product scrapped. Summary of the invention
[0003] The purpose of the present invention is to provide a circular cutting knife with good heat dissipation effect, high strength, small vibration during circular cutting, long service life, and the ability to reduce dust adhesion to avoid the formation of black circles, thereby improving the circular cutting quality of the product.
[0004] Another object of the present invention is to provide a paper box ring cutting device with long service life and good ring cutting quality.
[0005] In order to achieve the above-mentioned purpose, the circular cutting knife provided by the present invention includes an annular knife body, one side of which is coaxially provided with a mounting shaft or a mounting hole, and the annular knife body is evenly arranged around its own central axis with at least two inclined holes passing through both sides; the normal plane of the central axis of the annular knife body is used as the projection plane, and the projection line of the central axis of the inclined hole is perpendicular to the projection line of the diameter of the annular knife body passing through the center point of the inclined hole.
[0006] Compared with the prior art, the present invention reduces the overall material of the annular cutter by arranging inclined holes arranged around the central axis of the annular cutter body, that is, reducing the heat transfer medium, thereby reducing heat storage and reducing heat conduction to other components. In addition, by making the projection line of the central axis of the inclined hole perpendicular to the projection line of the diameter of the annular cutter body passing through the center point of the inclined hole, when the annular cutter rotates, each inclined hole can form a shear on the air in the tangential direction of the circle where it is located, so that the air can flow from one side of the annular cutter body to the other side through the inclined hole, and the air The flow can effectively take away the heat of the annular blade body, thereby achieving the purpose of rapid heat dissipation. Therefore, the heat dissipation effect of the annular cutter is very good. The temperature reduction makes the material and structure of the annular cutter change less, thereby reducing the occurrence of vibration. In addition, the inclined hole can make the annular blade body expand toward the inside of the inclined hole when heated, thereby reducing the change in the diameter of the annular blade body, and the inclined hole can quickly reduce the temperature of the annular blade body, thereby effectively reducing the thermal expansion, making the diameter of the annular blade body change less, so that it is more accurate during cutting, avoiding damage to itself and the fixture, and effectively extending the service life. In addition, due to the effect of the inclined hole, the annular blade body generates airflow. Therefore, during the ring cutting, the airflow can simultaneously carry the dust adhered to the surface of the annular blade body downward through the inclined hole, thereby avoiding the dust from being adhered to the vicinity of the blade due to static electricity generated by the friction of the annular blade body and being carbonized at high temperature to form a black circle, which pollutes the product. Therefore, the annular cutter of the present invention can perform ring cutting on materials of different colors, and the ring cutting quality is very good and the service life is long.
[0007] Preferably, the plane passing through the central axis of the inclined hole is used as the projection plane, and the angle between the central axis of the inclined hole and the projection of the central axis of the annular blade body is in the range of 25-60 degrees. By controlling the inclination of the inclined hole within this range, the airflow generation effect can be optimized, thereby optimizing the heat dissipation effect and the dust removal effect.
[0008] Preferably, the thickness of the blade of the annular blade body gradually decreases from the inside to the periphery. This allows the blade to reach the cutting line of the product more accurately and also makes the strength of the annular blade body greater.
[0009] Preferably, the side surface of the annular cutter body on the same side as the mounting shaft or mounting hole is a plane, so that a smooth plane incision can be left on the cutting line of the product, and the annular cutting effect is excellent.
[0010] Preferably, the diameter of the annular blade body is D, the diameter of the mounting shaft or mounting hole is d, and the diameter of the inclined hole is m, where m=(Dd) / 5. By making the diameter of the inclined hole satisfy this relationship, the strength of the annular blade body is not affected, and the heat dissipation and dust removal effects of the annular blade body can be optimized.
[0011] Specifically, the diameter of the circle where the center of the inclined hole is located is n, n = 2m + d. By making the setting position of the inclined hole satisfy this relationship, the strength of the annular blade body is not affected, and the heat dissipation and dust removal effects of the annular blade body can be optimized.
[0012] Specifically, the number of the inclined holes is g, g=(nπ) / 2m. By making the number of the inclined holes satisfy this relationship, the strength of the annular blade body is not affected, and the heat dissipation and dust removal effects of the annular blade body can be optimized.
[0013] A paper box circular cutting device comprises a negative ion generator, a driving motor and a circular cutting knife. The output end of the driving motor is connected to the circular cutting knife and drives the circular cutting knife to rotate. The output end of the negative ion generator faces the circular cutting knife.
[0014] Specifically, the surface of the ring cutter is treated with a PVD process, which can greatly reduce the heat storage of the ring cutter, so that an insulation is formed between the ring cutter medium and the heat. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The invention is a state structure diagram of an existing circular cutting knife when circularly cutting a paper-plastic packaging box.
[0016] Figure 2 It is a structural diagram of a carton ring cutting device of the present invention.
[0017] Figure 3 It is a stereogram of a circular cutting knife of the present invention.
[0018] Figure 4 It is a top view of the circular cutting knife of the present invention.
[0019] Figure 5 yes Figure 4 Cross-sectional view along the AA direction. DETAILED DESCRIPTION
[0020] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.
[0021] like Figures 2 to 5As shown, the carton ring cutting device 100 of the present invention includes a ring cutting knife 1, a driving motor 2 and a negative ion generator 3, the output end of the driving motor 2 is connected to the ring cutting knife 1 and drives the ring cutting knife 1 to rotate, and the output end of the negative ion generator 3 faces the ring cutting knife. The ring cutting knife 1 includes a ring cutting knife body 11; a mounting shaft 12 is coaxially provided on one side of the ring cutting knife body 11, and the mounting shaft 12 is connected to the output end of the driving motor 2, and the output end of the negative ion generator 3 faces the ring cutting knife body 11. Specifically, the output end of the negative ion generator 3 faces the ring cutting knife 1 at a 45-degree angle, and blows air toward the ring cutting knife 1 at the same time, and the negative ions generated by the negative ion generator 3 will diffuse to the periphery of the ring cutting knife 1 through the gas fluid, so that the ring cutting knife 1 eliminates static electricity, so that dust will not stick. Specifically, a mounting hole 11a is coaxially provided on one side of the ring cutting knife body 11, and the mounting shaft 12 is plugged and fixed in the mounting hole 11a. Of course, the annular blade body 11 and the mounting shaft 12 may also be an integrally formed structure. The annular blade body 11 is evenly arranged around its own central axis O with at least two inclined holes 111 penetrating both sides; the normal plane of the central axis O of the annular blade body 11 is taken as the projection plane P, and the projection line q of the central axis Q of the inclined hole 111 on the projection plane P is perpendicular to the projection line r of the diameter of the annular blade body 11 passing through the center point of the inclined hole 111. The surface of the annular cutter 1 is treated with a PVD process (i.e., physical vapor deposition). After the PVD process, the heat storage of the annular cutter 1 can be greatly reduced, so that an isolation is formed between the medium and the heat of the annular cutter 1.
[0022] Please see again Figure 5 , with the plane passing through the central axis Q of the inclined hole 111 as the projection plane K, the angle a between the central axis Q of the inclined hole 111 and the projection line of the central axis O of the annular blade body 11 is in the range of 25-60 degrees. Preferably, in this embodiment, the angle a between the central axis Q of the inclined hole 111 and the projection of the central axis O of the annular blade body 11 is 30 degrees. By controlling the inclination of the inclined hole 111 within this range, the airflow generation effect can be optimized, thereby optimizing the heat dissipation effect and the dust removal effect.
[0023] Please see again Figure 5 The thickness of the blade of the annular blade body 11 gradually decreases from the inside to the outside. This allows the blade to reach the cutting line of the product more accurately, and at the same time makes the strength of the annular blade body 11 greater. The side surface of the annular blade body 11 on the same side as the mounting shaft 12 is a plane W. This can leave a smooth plane incision on the cutting line of the product, and the annular cutting effect is excellent.
[0024] The diameter of the annular blade body 11 is a constant D, the diameter of the mounting shaft 12 is a fixed value d, and the diameter of the inclined hole 111 is m, m=(Dd) / 5. By making the diameter of the inclined hole 111 satisfy this relationship, the strength of the annular blade body 11 is not affected, and the heat dissipation and dust removal effects of the annular blade body 11 can be optimized.
[0025] The diameter of the circle where the center of the inclined hole 111 is located is n, n = 2m + d. By making the setting position of the inclined hole 111 satisfy this relationship, the strength of the annular blade body 11 is not affected, and the heat dissipation and dust removal effects of the annular blade body 11 can be optimized.
[0026] The number of the inclined holes 111 is g, g=(nπ) / 2m, π is the ratio of a circle to a circle, and its value is 3.14159265. By making the number of the inclined holes 111 satisfy this relationship, the strength of the annular blade body 11 is not affected, and the heat dissipation and dust removal effects of the annular blade body 11 can be optimized.
[0027] According to the relationship between the above parameters, taking the diameter of the annular cutter body 11 as 30 mm as an example, the values of other parameters of the annular cutter 1 can be obtained:
[0028] The diameter of the annular blade body 11 is D=30 mm;
[0029] The diameter of the mounting shaft 12, d = 8 mm;
[0030] The diameter of the inclined hole 111, m = (30-8) / 5 = 4.4 mm;
[0031] The diameter of the circle where the center of the inclined hole 111 is located is n=2*4.4+8=16.8 mm;
[0032] The number of the inclined holes 111 is g=(16.8*3.14) / (2*4.4)=6.
[0033] Compared with the prior art, the present invention provides the annular cutter body 11 of the annular cutter 1 with inclined holes 111 arranged around the central axis thereof, thereby reducing the overall material of the annular cutter 1, that is, reducing the heat-conducting medium, thereby reducing the heat storage and reducing the heat conduction to other components. In addition, by making the projection line of the central axis of the inclined hole 111 perpendicular to the projection line of the diameter of the annular cutter body 11 passing through the center point of the inclined hole 111, when the annular cutter 1 rotates, each inclined hole 111 can form a shear on the air in the tangential direction of the circle where it is located, so that the air can flow from one side of the annular cutter body 11 to the other side through the inclined hole 111. The flow of air can effectively take away the heat of the annular blade body 11, thereby achieving the purpose of rapid heat dissipation. Therefore, the heat dissipation effect of the circular cutter 1 is very good. The temperature reduction makes the material and structure of the circular cutter 1 change little, thereby reducing the occurrence of vibration. In addition, the inclined hole 111 can make the annular blade body 11 expand toward the inside of the inclined hole 111 when heated, thereby reducing the change in the diameter of the annular blade body 11, and the inclined hole 111 can make the temperature of the annular blade body 11 quickly reduce, thereby effectively reducing thermal expansion, making the diameter of the annular blade body 11 change little, so that it is more precise during cutting, avoiding damage to itself and the clamp, and effectively extending the service life. In addition, due to the action of the inclined hole 111, the annular blade body 11 generates airflow. Therefore, during ring cutting, the airflow can simultaneously carry the dust adhered to the surface of the annular blade body 11 downward through the inclined hole 111, thereby preventing the dust from adhering to the vicinity of the blade due to static electricity generated by the friction of the annular blade body 11 and being carbonized at high temperature to form a black circle, thereby contaminating the product. At the same time, by arranging a negative ion generator 3 to eliminate the electrons of the annular blade body 11, it is made less likely for dust to adhere to the vicinity of the blade. Therefore, the ring cutting knife 1 of the present invention can perform ring cutting on materials of different colors, the ring cutting quality is very good, and the service life is long.
[0034] The structure of the negative ion generator 3 involved in the paper box ring cutting device 100 of the present invention is well known to ordinary technicians in the field and will not be described in detail here.
[0035] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.
Claims
1. A circular cutting knife, characterized in that: It comprises an annular cutter body, one side of which is coaxially provided with a mounting shaft or a mounting hole, and the annular cutter body is provided with at least two inclined holes that are evenly arranged around its own central axis and pass through both sides; the normal plane of the central axis of the annular cutter body is used as the projection plane, and the projection line of the central axis of the inclined hole is perpendicular to the projection line of the diameter of the annular cutter body passing through the center point of the inclined hole.
2. The circular cutting knife according to claim 1, characterized in that: Taking the plane passing through the central axis of the inclined hole as the projection plane, the angle between the central axis of the inclined hole and the projection of the central axis of the annular cutter body is in the range of 25-60 degrees.
3. The circular cutting knife according to claim 1, characterized in that: The thickness of the blade of the annular blade body gradually decreases from the inside to the periphery.
4. The circular cutting knife according to claim 1, characterized in that: The side surface of the annular cutter body on the same side as the mounting shaft or the mounting hole is a plane.
5. The circular cutting knife according to claim 1, characterized in that: The diameter of the annular cutter body is D, the diameter of the mounting shaft or mounting hole is d, and the diameter of the inclined hole is m, where m=(Dd) / 5.
6. The circular cutting knife according to claim 5, characterized in that: The diameter of the circle where the center of the inclined hole is located is n, n=2m+d.
7. The circular cutting knife according to claim 6, characterized in that: The number of the inclined holes is g, g=(nπ) / 2m.
8. A carton ring cutting device, characterized in that: It comprises a negative ion generator, a driving motor and the circular cutter according to any one of claims 1 to 7, wherein the output end of the driving motor is connected to the circular cutter and drives the circular cutter to rotate, and the output end of the negative ion generator faces the circular cutter.
9. The carton ring cutting device according to claim 8, characterized in that: The surface of the circular cutter is treated by PVD process.