A heat welding knife roller mechanism for pull-up pants

Abstract

The present invention relates to the field of disposable sanitary products equipment, and in particular to a pull-up pants hot welding knife roller mechanism, comprising a frame, a hot knife roller rotatably arranged on the frame, and a hot light roller rotatably arranged on the frame, wherein the hot knife roller comprises a knife roller shaft, a knife roller body sleeved on the knife roller shaft, and a knife roller protection ring arranged on both sides of the knife roller body, wherein three knife roller convex parts are protruding outward from the knife roller body, the hot light roller comprises a light roller shaft, a light roller body sleeved on the light roller shaft, and a light roller protection ring arranged on both sides of the light roller body, wherein two light roller convex parts are protruding outward from the light roller body, wherein the width of the light roller convex part is greater than the width of the knife roller convex part, the outer diameter of the knife roller convex part is smaller than the outer diameter of the knife roller protection ring, and the difference is 0.05-0.2mm, and the outer diameter of the light roller convex part is smaller than the outer diameter of the light roller protection ring, and the difference is 0.05-0.2mm. The invention solves the technical problems of the hot pressing suture being not firm or the hot pressing suture producing perforations existing in the pull-up pants hot welding mechanism in the prior art.

Description

Technical Field

[0001] The invention relates to the field of disposable sanitary product equipment, in particular to a heat welding knife roller mechanism for pull-up pants. Background Art

[0002] At present, the applicant has disclosed a hot embossing tool holder device in Chinese Patent No.: ZL201620025330.0, which includes a tool holder, an upper knife roller assembly, a lower knife roller assembly, a first pushing mechanism, a second pushing mechanism, a first guide rod, a second guide rod, a first spring, a second spring, a first adjusting mechanism and a second adjusting mechanism. The two ends of the upper knife roller assembly are respectively connected to the first adjusting mechanism and the second adjusting mechanism and can be adjusted in the vertical direction and are arranged between the left side plate and the right side plate. The other end of the first guide rod and the other end of the second guide rod are respectively fixedly connected to the two ends of the lower knife roller assembly and can be adjusted in the vertical direction and are arranged between the left side plate and the right side plate. One end of the upper knife roller assembly located on the left side plate is flexibly connected to the left end of the lower knife roller assembly in the vertical direction through the first spring, and one end of the upper knife roller assembly located on the right side plate is flexibly connected to the right end of the lower knife roller assembly in the vertical direction through the second spring. The present invention solves the problems of unstable structure and short service life of the existing hot embossing tool holder device.

[0003] The above patent discloses the basic structure of the existing embossing tool holder. In the field of disposable sanitary products, the structures used for embossing and hot pressing and sewing are basically the same, and the purpose is to achieve thermoplastic deformation or thermoplastic bonding of layered materials by rolling between heated rollers. In pull-up pants, both ends of the waist need to be hot pressed and sewn, but because the thickness is often thicker, and because the waist is equipped with elastic sheets or elastic bands, the thickness of the material will increase, and the material may be wrinkled, which will cause greater difficulties in hot pressing and sewing the waist, and it is easy to have a situation where the hot pressing and sewing is not firm, resulting in waste and defective products. This defect is particularly obvious in adult pull-up pants products.

[0004] The applicant has also conducted relevant research and development attempts to address this defect, such as increasing the heating temperature to improve the power and efficiency of hot pressing and achieve effective hot pressing suture. However, when the temperature is increased, local holes are often generated at the hot welding parts on the surface of the product, making the product defective and wasteful. Summary of the invention

[0005] Therefore, in view of the above-mentioned problems, the present invention proposes a pull-up pants heat welding knife roller mechanism, which solves the technical problems of the pull-up pants heat welding mechanism in the prior art such as the hot pressing seams being not firm or the hot pressing seams causing perforations.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pull-up pants hot welding knife roller mechanism, including a frame, a hot knife roller rotatably arranged on the frame, and a hot light roller rotatably arranged on the frame, the hot knife roller includes a knife roller shaft, a knife roller body sleeved on the knife roller shaft, and a knife roller protection ring arranged on both sides of the knife roller body, three knife roller convex parts protruding outwardly are arranged on the knife roller body, two knife roller electric heating tube holes are arranged in the axial direction in the knife roller body, and a knife roller is sleeved in the knife roller electric heating tube hole. A roller copper tube, a roller electric heating tube is arranged in the roller copper tube, more than three roller threaded heat dissipation holes are arranged in the roller body on the side of the roller electric heating tube hole close to the axis, a roller thermocouple hole is arranged on the outer side of the two roller electric heating tube holes on each roller convex part, a roller thermocouple is arranged in the roller thermocouple hole, the center connecting line of each roller electric heating tube hole, the center connecting line of each thermocouple hole, and the center connecting line of each roller threaded heat dissipation hole are straight lines respectively, and the center connecting line of each roller electric heating tube hole, the center connecting line of each thermocouple hole, and the center connecting line of each roller threaded heat dissipation hole are straight lines respectively. The center connecting line of the even hole and the center connecting line of each knife roller threaded heat dissipation hole are respectively arranged in parallel, the knife roller copper tube is provided with a toothed depression on the side close to the axis of the knife roller shaft, and the knife roller copper tube is provided with an arc protrusion on the side away from the axis of the knife roller shaft. The knife roller electric heating tube hole is provided with an arc depression matching the arc protrusion, and bolt holes connected to the knife roller electric heating tube hole are respectively provided on both sides of each knife roller convex part, and each bolt hole is provided with a locking bolt for locking the knife roller copper tube, and a positive integer number of holes perpendicular to the knife roller convex part is provided on the knife roller convex part. The grooves are arranged at intervals along the axial direction of the rotating shaft. The hot optical roller includes an optical roller shaft, an optical roller body sleeved on the optical roller shaft, and an optical roller protection ring arranged on both sides of the optical roller body. Two optical roller convex parts are protruding outward from the optical roller body. The width of the optical roller convex part is greater than the width of the knife roller convex part. The outer diameter of the knife roller convex part is smaller than the outer diameter of the knife roller protection ring, and the difference is 0.05-0.2mm. The outer diameter of the optical roller convex part is smaller than the outer diameter of the optical roller protection ring, and the difference is 0.05-0.2mm.

[0007] Furthermore, the structure of the smooth roller body is the same as that of the knife roller body.

[0008] Furthermore, an air guide screw is threadedly connected to each knife roller threaded heat dissipation hole on one side surface of the knife roller body, and each air guide screw includes a screw portion threadedly connected to the knife roller threaded heat dissipation hole, an air inlet slot body located on the outside of the roller body, and air guide blades located outside the roller body and connected to the air inlet slot body; an air inlet is axially provided on the screw portion, an air inlet slot is provided on the air inlet slot body, an air guide slot is provided on the air guide blades, the air guide slot is connected to the air inlet slot, and the air inlet slot is connected to the air inlet; when the knife roller rotates clockwise, the air guide blades guide the airflow into the heat dissipation threaded holes.

[0009] Furthermore, a balancing screw is threadedly connected to each of the knife roller threaded heat dissipation holes on the other side of the knife roller body, and an air outlet connecting the knife roller threaded heat dissipation holes and the external atmosphere is opened in the middle of the balancing screw.

[0010] Furthermore, the weight of the balancing screw is 1-1.2 times the weight of the air guide screw.

[0011] Furthermore, the structure of the balancing screw is the same as that of the air guide screw.

[0012] By adopting the above technical solution, the beneficial effects of the present invention are:

[0013] 1. This solution realizes the hot pressing and sewing of pull-up pants by the cooperation of hot knife roller and hot light roller. The hot knife roller is assembled by knife roller shaft, knife roller body and knife roller protection ring. The knife roller shaft is made of Cr12 material and vacuum heat treatment is used to improve the hardness to ensure that there will be no microscopic radial runout during use, and improve the stability of the circular runout of the whole hot knife roller. The knife roller protection ring and knife roller body are made of high-speed tool steel vacuum heat treatment and deep cryogenic treatment to greatly improve the hardness of the material actually used and have good toughness.

[0014] In this solution, the hot knife roller has three knife roller convex parts, and the hot optical roller has two smooth roller convex parts. The diameter of the hot knife roller and the hot optical roller can be set to the same, and the rotation speed can also be set to the same, so that one knife roller convex part will only be fixed to roll and cut with one smooth roller convex part. In this way, different patterns can be set on different knife roller convex parts to meet customer needs, and corresponding settings can be made on different smooth roller convex parts to achieve hot pressing of products of different thicknesses. This setting is also to solve the problem of dynamic balance. Existing hot pressing mechanisms usually adopt a 1-circle-1-piece method, which can effectively improve the accuracy. However, if one smooth roller convex part or one knife roller convex part is used, it will jump when rotating, especially when running at high speed. This jump will correspondingly affect the service life of the hot knife roller or hot optical roller. This solution perfectly solves the three problems of large diameter of hot knife roller or hot optical roller, poor dynamic balance, and troublesome pattern switching.

[0015] The grooves on the convex part of the knife roller are produced by precision carving under the hardness adjustment of HRC60 degrees or above, which ensures that the groove area will not cause cracks due to heat treatment after processing, and will not cause tooth collapse in subsequent use. The teeth formed between two adjacent groove areas have a trapezoidal shape with narrow upper and wide lower parts, which can effectively increase the service life of the teeth. In addition, the use of groove processing to form teeth can achieve an integral type, improve strength, and avoid the occurrence of undesirable conditions such as loosening and breaking caused by bolt fixing in the inlay method.

[0016] The double-blade roller electric heating tube hole design ensures that the heating temperature is more uniform than that of a single electric heating tube. In order to ensure the uniform contact between the blade roller electric heating tube and the blade roller body, the blade roller copper tube is used. During use, the principle that the thermal expansion coefficient of copper is higher than that of steel is used to make the blade roller copper tube contact the electric heating tube and the roller body very evenly and improve the working efficiency of the electric heating tube. In addition, a tooth-shaped depression is provided on the side of the blade roller copper tube close to the axis of the blade roller shaft, and an arc protrusion is provided on the side of the blade roller copper tube away from the axis of the blade roller shaft. The function of the arc protrusion is to achieve installation positioning, increase the contact area, and facilitate heat transfer. The setting of the tooth-shaped depression can reduce the contact area and reduce heat transfer. In this way, the heating effect of the blade roller convex part is better, and its heat is more concentrated, reducing the speed of heat transmission from the electric heating roller to the blade roller shaft, thereby effectively improving the utilization rate, protecting the blade roller shaft, and increasing the service life.

[0017] In addition, the arrangement of bolt holes and locking bolts can effectively realize the locking of the knife roller copper tube and the knife roller electric heating tube.

[0018] In addition, the center connecting lines of the electric heating tube holes of each knife roller, the center connecting lines of the electric thermocouple holes, and the center connecting lines of the threaded heat dissipation holes of each knife roller are respectively straight lines, and the center connecting lines of the electric heating tube holes of each knife roller, the center connecting lines of the electric thermocouple holes, and the center connecting lines of the threaded heat dissipation holes of each knife roller are respectively arranged in parallel. The purpose of such arrangement is to make these holes form a relatively uniform distribution state, to ensure that the influence on the roller body forms a uniform state, thereby reducing the generation of stress, and to arrange them in parallel with each other, which can effectively ensure the effective realization of heating and heat dissipation and improve its efficiency.

[0019] The outer diameter of the knife roller convex portion is smaller than the outer diameter of the knife roller protection ring, with a difference of 0.05-0.2mm. The outer diameter of the smooth roller convex portion is smaller than the outer diameter of the smooth roller protection ring, with a difference of 0.05-0.2mm. This arrangement can effectively protect the knife roller convex portion and the smooth roller convex portion.

[0020] 2. Since the diameter of the knife roller threaded heat dissipation hole is actually very small and the length is relatively large, it is relatively difficult to dissipate heat. The setting of the air guide screw can realize the diversion of wind, thereby effectively improving the heat dissipation effect. The heat dissipation hole is a threaded setting, which can effectively increase the heat dissipation area, thereby cooperating with the air guide screw to achieve effective improvement in heat dissipation performance.

[0021] 3. The purpose of setting the balancing screw is to achieve dynamic balance, and it will not guide the wind into the threaded heat dissipation holes of the knife roller. The structure of the balancing screw can be the same as that of the air guide screw. In addition, due to the air-inducing state, the air guide screw will be subjected to a certain wind pressure. Setting the weight of the balancing screw to 1-1.2 times the weight of the air guide screw can effectively achieve balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the hot knife roller;

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the present invention;

[0025] Figure 4 It is an enlarged structural schematic diagram of the knife roller electric heating tube hole and the knife roller thermocouple hole;

[0026] Figure 5 It is a structural schematic diagram of the air guide screw;

[0027] Figure 6 yes Figure 5 Schematic diagram of the structure of the left viewing state;

[0028] Figure 7 It is a schematic diagram of the structure of the air guide screw, the balance screw and the threaded heat dissipation hole of the knife roller;

[0029] Figure 8 yes Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0030] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0031] refer to Figures 1 to 8The present embodiment provides a pull-up pants hot welding knife roller mechanism, comprising a frame, a hot knife roller 1 rotatably arranged on the frame, and a hot light roller 2 rotatably arranged on the frame, the hot knife roller 1 comprising a knife roller shaft 11, a knife roller body 12 sleeved on the knife roller shaft 11, and a knife roller protection ring 13 arranged on both sides of the knife roller body 12, the knife roller body 12 is provided with three knife roller convex parts 121 protruding outward, the knife roller body 12 is provided with two knife roller electric heating pipe holes 122 along the axial direction at the knife roller convex parts 121, the knife roller electric heating pipe hole 122 is sleeved with a knife roller copper tube 3, the knife roller copper tube 3 is provided with a knife roller electric heating pipe 4, the knife roller body 12 is provided with more than three knife roller threaded heat dissipation holes 123 on the side of the knife roller electric heating pipe hole 122 close to the axis, and the present scheme is set to four, of course, it can also be other numbers. A knife roller thermocouple hole 124 is provided on each knife roller convex portion 121, located on the outer side of the two knife roller electric heating tube holes 122, and a knife roller thermocouple 5 is provided in the knife roller thermocouple hole 124. The center connecting line of each knife roller electric heating tube hole 122, the center connecting line of each electric thermocouple hole 124, and the center connecting line of each knife roller threaded heat dissipation hole 123 are respectively straight, and the center connecting line of each knife roller electric heating tube hole 122, the center connecting line of each electric thermocouple hole 124, and the center connecting line of each knife roller threaded heat dissipation hole 123 are respectively arranged in parallel. A toothed depression 32 is provided on the side of the knife roller copper tube 3 close to the axis of the knife roller shaft 11, and an arc protrusion 31 is provided on the side of the knife roller copper tube 3 away from the axis of the knife roller shaft 11. An arc depression 125 matching the arc protrusion 31 is provided in the knife roller electric heating tube hole 122, and both sides of each knife roller convex portion 121 Bolt holes 126 connected to the knife roller electric heating pipe holes are respectively provided on the sides, and each bolt hole 126 is provided with a locking bolt 127 for locking the knife roller copper tube. The knife roller convex portion 12 is provided with a positive integer number of grooves 128 perpendicular to the axis of the rotating shaft, and each groove 128 is arranged at intervals along the axial direction of the rotating shaft. The hot light roller 2 includes a light roller shaft 21, a light roller body 22 sleeved on the light roller shaft 21, and a light roller protection ring 23 arranged on both sides of the light roller body 22. Two light roller convex portions 221 protrude outward from the light roller body 22, and the width of the light roller convex portion 221 is greater than the width of the knife roller convex portion 121. The outer diameter of the knife roller convex portion 121 is smaller than the outer diameter of the knife roller protection ring 13, and the difference is 0.05-0.2mm. The outer diameter of the light roller convex portion 221 is smaller than the outer diameter of the light roller protection ring 23, and the difference is 0.05-0.2mm.

[0032] The structure of the smooth roller body 22 is the same as that of the knife roller body 12 .

[0033] On one side of the knife roller body 12, an air guide screw 6 is threadedly connected to each knife roller thread heat dissipation hole 123. Each air guide screw 6 includes a screw portion 61 threadedly connected to the knife roller thread heat dissipation hole 123, an air inlet slot body 62 located outside the roller body, and an air guide blade 63 located outside the roller body and connected to the air inlet slot body. An air inlet 611 is axially provided on the screw portion 61, an air inlet slot 621 is provided on the air inlet slot body 62, and an air guide slot 631 is provided on the air guide blade 63. The air guide slot 631 is connected to the air inlet slot 621, and the air inlet slot 621 is connected to the air inlet 611. When the knife roller rotates clockwise, the air guide blade guides the airflow into the heat dissipation thread hole. On the other side of the knife roller body 12, a balancing screw 7 is threadedly connected to each knife roller thread heat dissipation hole 123. An air outlet 71 is opened in the middle of the balancing screw 7 to connect the knife roller thread heat dissipation hole and the external atmosphere. The structure of the balancing screw 7 is the same as that of the air guide screw 6 .

[0034] in, Figure 5 The arrows shown are the direction of air flow.

[0035] In the above solution, the weight of the balancing screw may also be 1-1.2 times the weight of the air guide screw.

[0036] The beneficial effects of the present invention are:

[0037] 1. This solution realizes the hot pressing and sewing of pull-up pants by the cooperation of hot knife roller and hot light roller. The hot knife roller is assembled by knife roller shaft, knife roller body and knife roller protection ring. The knife roller shaft is made of Cr12 material and vacuum heat treatment is used to improve the hardness to ensure that there will be no microscopic radial runout during use, and improve the stability of the circular runout of the whole hot knife roller. The knife roller protection ring and knife roller body are made of high-speed tool steel vacuum heat treatment and deep cryogenic treatment to greatly improve the hardness of the material actually used and have good toughness.

[0038] In this solution, the hot knife roller has three knife roller convex parts, and the hot optical roller has two smooth roller convex parts. The diameter of the hot knife roller and the hot optical roller can be set to the same, and the rotation speed can also be set to the same, so that one knife roller convex part will only be fixed to roll and cut with one smooth roller convex part. In this way, different patterns can be set on different knife roller convex parts to meet customer needs, and corresponding settings can be made on different smooth roller convex parts to achieve hot pressing of products of different thicknesses. This setting is also to solve the problem of dynamic balance. Existing hot pressing mechanisms usually adopt a 1-circle-1-piece method, which can effectively improve the accuracy. However, if one smooth roller convex part or one knife roller convex part is used, it will jump when rotating, especially when running at high speed. This jump will correspondingly affect the service life of the hot knife roller or hot optical roller. This solution perfectly solves the three problems of large diameter of hot knife roller or hot optical roller, poor dynamic balance, and troublesome pattern switching.

[0039] The grooves on the convex part of the knife roller are produced by precision carving under the hardness adjustment of HRC60 degrees or above, which ensures that the groove area will not cause cracks due to heat treatment after processing, and will not cause tooth collapse in subsequent use. The teeth formed between two adjacent groove areas have a trapezoidal shape with narrow upper and wide lower parts, which can effectively increase the service life of the teeth. In addition, the use of groove processing to form teeth can achieve an integral type, improve strength, and avoid the occurrence of undesirable conditions such as loosening and breaking caused by bolt fixing in the inlay method.

[0040] The double-blade roller electric heating tube hole design ensures that the heating temperature is more uniform than that of a single electric heating tube. In order to ensure the uniform contact between the blade roller electric heating tube and the blade roller body, the blade roller copper tube is used. During use, the principle that the thermal expansion coefficient of copper is higher than that of steel is used to make the blade roller copper tube contact the electric heating tube and the roller body very evenly and improve the working efficiency of the electric heating tube. In addition, a tooth-shaped depression is provided on the side of the blade roller copper tube close to the axis of the blade roller shaft, and an arc protrusion is provided on the side of the blade roller copper tube away from the axis of the blade roller shaft. The function of the arc protrusion is to achieve installation positioning, increase the contact area, and facilitate heat transfer. The setting of the tooth-shaped depression can reduce the contact area and reduce heat transfer. In this way, the heating effect of the blade roller convex part is better, and its heat is more concentrated, reducing the speed of heat transmission from the electric heating roller to the blade roller shaft, thereby effectively improving the utilization rate, protecting the blade roller shaft, and increasing the service life.

[0041] The two thermocouples monitor the actual temperature of their respective electric heating tubes in real time and adjust them to compensate each other.

[0042] The threaded heat dissipation holes of the knife roller are used to isolate the temperature from being conducted downward during operation. The eddy current generated by the airflow under the action of the thread is used to quickly dissipate heat to solve the problem of uneven welding block surface, poor welding effect or burning caused by the high temperature in the middle part of the knife roller convex part and the slightly lower temperature on both sides. This makes the overall temperature balance expansion coefficient of the hot welding block consistent, improving the quality of welding.

[0043] The side of the knife roller convex part adopts a pyramid shape design, which is small at the top and gradually enlarged at the bottom. The width of the top part is the same as the size of the product welding area, and then extends vertically downward. This ensures that during use, only the non-woven fabric in the welding area of ​​the pull-up pants product will contact the teeth, and the surrounding area will not be squeezed by the roller surface, causing problems such as product welding skew or phase deviation. The arc extends downward to both sides to improve the overall structural strength of the entire upper part to avoid deformation or cracks caused by the thin material under long-term heavy load operation. The tooth shape of the knife roller convex part has a 45-degree chamfer on both sides along the circumferential direction to further blunt the contact angle, so that the intensity and sound of the impact when the upper and lower rollers contact will be further reduced.

[0044] In addition, the arrangement of bolt holes and locking bolts can effectively realize the locking of the knife roller copper tube and the knife roller electric heating tube.

[0045] In addition, the center connecting lines of the electric heating tube holes of each knife roller, the center connecting lines of the electric thermocouple holes, and the center connecting lines of the threaded heat dissipation holes of each knife roller are respectively straight lines, and the center connecting lines of the electric heating tube holes of each knife roller, the center connecting lines of the electric thermocouple holes, and the center connecting lines of the threaded heat dissipation holes of each knife roller are respectively arranged in parallel. The purpose of such arrangement is to make these holes form a relatively uniform distribution state, to ensure that the influence on the roller body forms a uniform state, thereby reducing the generation of stress, and to arrange them in parallel with each other, which can effectively ensure the effective realization of heating and heat dissipation and improve its efficiency.

[0046] The outer diameter of the knife roller convex portion is smaller than the outer diameter of the knife roller protection ring, with a difference of 0.05-0.2mm. The outer diameter of the smooth roller convex portion is smaller than the outer diameter of the smooth roller protection ring, with a difference of 0.05-0.2mm. This arrangement can effectively protect the knife roller convex portion and the smooth roller convex portion.

[0047] 2. Since the diameter of the knife roller threaded heat dissipation hole is actually very small and the length is relatively large, it is relatively difficult to dissipate heat. The setting of the air guide screw can realize the diversion of wind, thereby effectively improving the heat dissipation effect. The heat dissipation hole is a threaded setting, which can effectively increase the heat dissipation area, thereby cooperating with the air guide screw to achieve effective improvement in heat dissipation performance.

[0048] 3. The purpose of setting the balancing screw is to achieve dynamic balance, and it will not guide the wind into the threaded heat dissipation holes of the knife roller. The structure of the balancing screw can be the same as that of the air guide screw. In addition, due to the air-inducing state, the air guide screw will be subjected to a certain wind pressure. Setting the weight of the balancing screw to 1-1.2 times the weight of the air guide screw can effectively achieve balance.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A pull-up pants hot welding knife roller mechanism, comprising a frame, a hot knife roller rotatably arranged on the frame, and a hot light roller rotatably arranged on the frame, characterized in that: The hot knife roller comprises a knife roller shaft, a knife roller body sleeved on the knife roller shaft, and a knife roller protection ring arranged on both sides of the knife roller body. The knife roller body is provided with three knife roller convex parts protruding outwardly, and two knife roller electric heating pipe holes are arranged in the knife roller body at the knife roller convex parts along the axial direction, and a knife roller copper tube is sleeved in the knife roller electric heating pipe hole, and a knife roller electric heating pipe is arranged in the knife roller copper tube, and more than three knife roller threaded heat dissipation holes are arranged in the knife roller body at one side of the knife roller electric heating pipe hole close to the axis center, and a knife roller thermocouple hole is arranged on each knife roller convex part and on the outer side of the two knife roller electric heating pipe holes, and a knife roller thermocouple is arranged in the knife roller thermocouple hole, and the center connecting line of each knife roller electric heating pipe hole, the center connecting line of each electric thermocouple hole, and the center connecting line of each knife roller threaded heat dissipation hole are respectively straight, and the center connecting line of each knife roller electric heating pipe hole, the center connecting line of each electric thermocouple hole, and the center connecting line of each knife roller threaded heat dissipation hole are respectively arranged in parallel. The cam is provided with a toothed depression on one side of the roller copper tube close to the axis of the knife roller shaft, and an arc protrusion is provided on the side of the knife roller copper tube away from the axis of the knife roller shaft, and an arc depression matching the arc protrusion is provided in the knife roller electric heating tube hole, and bolt holes connected to the knife roller electric heating tube holes are respectively provided on both sides of each knife roller protrusion, and each bolt hole is provided with a locking bolt for locking the knife roller copper tube. The knife roller protrusion is provided with a positive integer number of grooves perpendicular to the axis of the rotating shaft, and each groove is arranged at intervals along the axial direction of the rotating shaft. The hot light roller comprises a light roller shaft, a light roller body sleeved on the light roller shaft, and a light roller protection ring provided on both sides of the light roller body, and two light roller protrusions are protruding outward on the light roller body. The width of the light roller protrusion is greater than the width of the knife roller protrusion, and the outer diameter of the knife roller protrusion is smaller than the outer diameter of the knife roller protection ring, and the difference is 0.05-0.2mm. The outer diameter of the light roller protrusion is smaller than the outer diameter of the light roller protection ring, and the difference is 0.05-0.2mm; The structure of the smooth roller body is the same as that of the knife roller body; An air guide screw is threadedly connected to each knife roller threaded heat dissipation hole on one side surface of the knife roller body, and each air guide screw includes a screw portion threadedly connected to the knife roller threaded heat dissipation hole, an air inlet slot body located outside the roller body, and air guide blades located outside the roller body and connected to the air inlet slot body. An air inlet is axially provided on the screw portion, an air inlet slot is provided on the air inlet slot body, and an air guide slot is provided on the air guide blades. The air guide slot is connected to the air inlet slot, and the air inlet slot is connected to the air inlet. When the knife roller rotates clockwise, the air guide blades guide the airflow into the heat dissipation threaded holes.

2. The pull-up pants heat welding knife roller mechanism according to claim 1, characterized in that: A balancing screw is threadedly connected to each of the knife roller thread heat dissipation holes on the other side of the knife roller body, and an air outlet connecting the knife roller thread heat dissipation holes and the external atmosphere is opened in the middle of the balancing screw.

3. The pull-up pants heat welding knife roller mechanism according to claim 2, characterized in that: The weight of the balancing screw is 1-1.2 times the weight of the air guide screw.

4. The pull-up pants heat welding knife roller mechanism according to claim 3, characterized in that: The structure of the balancing screw is the same as that of the air guide screw.

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