Punching roller for low-melting-point valve bag

Abstract

The utility model belongs to the technical field of low-melting-point valve bag machining, and particularly relates to a punching roller for a low-melting-point valve bag, which comprises a punching roller main body, the whole punching roller main body is cylindrical, and a plurality of pricking needle groups are sequentially and uniformly arranged on the outer surface of the punching roller main body along the axial direction at certain intervals. Each pricking needle group comprises a plurality of pricking needle units which are annularly distributed in the circumferential direction of the punching roller body, the pricking needle units in every two adjacent pricking needle groups on the punching roller body are distributed in a staggered mode, each pricking needle unit is composed of a plurality of pricking needles which are fixedly arranged on the outer surface of the punching roller body, and the pricking needles are distributed in a quincunx shape; the valve bag punching device is reasonable in structural design and convenient to operate, the strength of a punched valve bag is guaranteed, uniform ventilation of the punched valve bag is achieved, and meanwhile burrs are prevented from being generated on the punched edge.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-melting-point valve bag processing, and particularly relates to a punching roller for low-melting-point valve bags. Background Art

[0002] With the widespread application of low-melting-point packaging films in the rubber and plastic and rubber and plastic additive industries, low-melting-point packaging films can be made into low-melting-point valve bags. As an environmentally friendly product that replaces traditional kraft paper and PEPE heavy-packaging embossed equipment packaging bags, low-melting-point valve bags can be directly fed in actual production. The raw materials used in the low-melting-point valve bags are non-toxic and environmentally friendly. They can be used as part of the rubber and the low-melting-point valve bags containing carbon black together with the materials into the rubber mixing process for rubber mixing; they are a very good environmentally friendly product.

[0003] The temperature is high during rubber processing and packaging, which will generate water vapor in the valve bag. The water vapor remaining in the valve bag will affect the performance of the packaged product. Therefore, it is necessary to punch micropores on the valve bag to disperse the water vapor in the valve bag through the micropores to prevent water droplets from forming on the surface of the valve bag and affecting the quality of the rubber.

[0004] However, in existing punching equipment, the needles on the punching rollers are mostly arranged in a straight line, which causes many problems in the punching process of valve bags.

[0005] First, when punching holes in the valve bag, the needle punches are arranged in a straight line, which makes it easy for stress to concentrate in the straight line direction between the holes. Therefore, when the valve bag is used in subsequent stages, such as being squeezed after filling materials, or encountering external forces such as collisions during transportation, the valve bag will be more likely to break or be damaged in the direction of stress concentration.

[0006] Secondly, the spacing and arrangement of the needles in this linear arrangement are relatively simple. During the punching process, stress concentration is likely to occur at the edge of the hole, which in turn leads to burrs and rough edges.

[0007] Third, the holes punched by needles arranged in a straight line will cause the gas to flow mainly in a straight line, making it difficult to achieve uniform ventilation. Utility Model Content

[0008] The main technical problem to be solved by the utility model is to provide a punching roller for low-melting-point valve bags with reasonable structural design and convenient operation, which not only ensures the strength of the valve bag after punching, but also realizes uniform air permeability of the valve bag after punching, while avoiding burrs on the punching edges.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A punching roller for low-melting-point valve bags includes a punching roller main body. The overall shape of the punching roller main body is cylindrical. A plurality of groups of needle groups are evenly arranged in sequence along the axial direction of the punching roller main body at a certain distance. Each group of needle groups includes a plurality of needle units arranged in a ring shape along the circumference of the punching roller main body. The needle units in two adjacent groups of needle groups on the punching roller main body are arranged in an alternating manner. Each needle unit is composed of a plurality of needles fixedly arranged on the outer surface of the punching roller main body, and the plurality of needles are arranged in a plum blossom shape.

[0011] The following is a further optimization of the above technical solution by the present invention:

[0012] The needle unit consists of six needles, one of which is located at the center, and the other five needles are evenly distributed around the needle at the center.

[0013] Further optimization: the center distance between the needle located at the center and the five needles evenly distributed around it is equal to e, and e is 3-5 mm.

[0014] Further optimization: the punching roller body and the needles are connected as one piece, and the punching roller body and the needles are cast from hard alloy.

[0015] Further optimization: The needles on the punching roller body are carved on the punching roller body by a high-precision computer engraving machine.

[0016] Further optimization: the overall shape of the needle is cone-shaped.

[0017] Further optimization: the axes of the needles are respectively arranged perpendicular to the axes of the punching roller bodies.

[0018] Further optimization: the needle units arranged along the axial direction of the punching roller body are needle unit rows, and the needle units in every two adjacent needle unit rows are respectively staggered.

[0019] The utility model arranges the needle groups at axial intervals, and arranges multiple needle groups at axially uniform intervals along the outer surface of the punching roller, so that the punching is evenly distributed in the axial direction, preventing the material strength from being excessively weakened due to local concentrated punching, and ensuring the stability of the axial strength of the valve bag; and the needle units of each needle group are arranged in a circumferential ring shape and the two adjacent groups are staggered, so that the circumferential punching is more uniform when the punching roller rotates, avoiding a significant drop in strength in a certain area due to excessive punching, and maintaining the integrity of the circumferential strength; at the same time, the needles in the needle unit are arranged in a plum blossom shape, and the force is evenly distributed during punching, which can avoid local excessive force causing extrusion, stretching and other damage to the material, maintain the original strength characteristics of the material, and ensure the strength of the valve bag after punching.

[0020] The utility model arranges the needle groups at uniform axial intervals and the needle units in two adjacent needle groups are staggered, so that the holes punched are evenly distributed on the surface of the valve bag, providing a uniform flow channel for the gas, achieving uniform ventilation, and avoiding uneven ventilation in some areas due to uneven punching; in addition, the multiple needles are arranged in a plum blossom shape to punch holes with regular shapes, uniform sizes and arrangements that are conducive to gas circulation. The distance and angle relationship between adjacent holes is reasonable, and the gas passage is less obstructed, further improving the ventilation efficiency and uniformity of the valve bag after punching.

[0021] The utility model arranges the needles in the needle unit in a plum blossom shape, thereby dispersing the stress around the hole during punching, reducing deformation, tearing and burr generation at the punching edge due to stress concentration; in addition, the needle groups are evenly arranged on the outer surface of the punching roller and are reasonably arranged in the circumferential and axial directions to ensure the uniformity of the punching process, so that the stress on the material is evenly distributed, avoiding the risk of burr generation at the punching edge due to local abnormal stress concentration, ensuring the smoothness of the punching edge, and improving product quality.

[0022] By adopting the above technical solution, the utility model has a reasonable structural design and is easy to operate. It not only ensures the strength of the valve bag after punching, but also achieves uniform ventilation of the valve bag after punching, while avoiding burrs on the punching edges.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a front view of the overall structure of an embodiment of the utility model;

[0026] Figure 3 For attachment Figure 2 A partial enlarged view of point A in the middle;

[0027] Figure 4 This is a schematic diagram of the structure of the embodiment of the present utility model when in use;

[0028] Figure 5 This is a top view of the embossing unit and the rubber roller in the embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the low-melting-point packaging film after embossing in an embodiment of the present invention.

[0030] In the figure: 1. Punching roller body; 2. Needle unit; 3. Needle; 4. Mounting hole; 5. Support shaft; 6. Rubber roller; 7. Low-melting-point valve bag; 8. Connecting plate; 9. Positioning roller. DETAILED DESCRIPTION

[0031] like Figure 1-6 As shown, a punching roller for low-melting-point valve bags includes a punching roller body 1. The overall shape of the punching roller body 1 is cylindrical. A plurality of groups of needle groups are evenly arranged in sequence along the axial direction of the punching roller body 1 at a certain distance. Each group of needle groups includes a plurality of needle units 2 arranged in a ring shape along the circumference of the punching roller body 1. The needle units 2 in two adjacent groups of needle groups on the punching roller body 1 are respectively arranged in an alternating manner. Each needle unit 2 is composed of a plurality of needles 3 fixedly arranged on the outer surface of the punching roller body 1, and the plurality of needles 3 are arranged in a plum blossom shape.

[0032] With this design, first, the needle groups are arranged at axial intervals, and multiple needle groups are arranged at axially uniform intervals along the outer surface of the punching roller, so that the punching is evenly distributed in the axial direction, preventing the material strength from being excessively weakened due to local concentrated punching, and ensuring the stability of the axial strength of the valve bag; and the needle units 2 of each needle group are arranged in a circumferential ring shape and the two adjacent groups are staggered, so that the circumferential punching is more uniform when the punching roller rotates, avoiding a sharp drop in strength in a certain area due to excessive punching, and maintaining the integrity of the circumferential strength; at the same time, the needles 3 in the needle unit 2 are arranged in a plum blossom shape, and the force is evenly distributed during punching, which can avoid local excessive force causing extrusion, stretching and other damage to the material, maintain the original strength characteristics of the material, and ensure the strength of the valve bag after punching.

[0033] Secondly, the needle groups are arranged at uniform axial intervals and the needle units 2 in two adjacent needle groups are staggered, so that the holes punched are evenly distributed on the surface of the valve bag, providing a uniform flow channel for the gas, achieving uniform ventilation, and avoiding uneven ventilation in some areas due to uneven punching; in addition, multiple needles 3 are arranged in a plum blossom shape to punch holes with regular shape, uniform size and arrangement that are conducive to gas circulation. The distance and angle relationship between adjacent holes is reasonable, and the gas passage is less obstructed, further improving the ventilation efficiency and uniformity of the valve bag after punching.

[0034] Thirdly, the needles 3 in the needle unit 2 are arranged in a plum blossom shape, thereby dispersing the stress around the hole during punching and reducing deformation, tearing and burrs on the punched edge due to stress concentration; in addition, the needle groups are evenly arranged on the outer surface of the punching roller and are reasonably arranged in the circumferential and axial directions to ensure the uniformity of the punching process, so that the stress on the material is evenly distributed, avoiding the risk of burrs on the punched edge due to local abnormal stress concentration, ensuring the smoothness of the punched edge and improving product quality.

[0035] In this embodiment, the puncture needle unit 2 is composed of six puncture needles, one of which is located at the center, and the remaining five puncture needles 3 are evenly distributed around the puncture needle 3 at the center.

[0036] The center distance between the needle 3 at the center and the five needles 3 evenly distributed around it is equal to e, and e is 3-5 mm, preferably 5 mm.

[0037] The punching roller body 1 and the needles 3 are connected in one piece, and the punching roller body 1 and the needles 3 are cast from hard alloy.

[0038] The hard alloy is 45# steel or alloy steel.

[0039] With this design, the punching roller body 1 made of cemented carbide can improve the overall structural strength of the punching roller for the low-melting-point valve bag 7, thereby extending the service life and greatly reducing the cost of use.

[0040] The needles 3 on the punching roller body 1 are carved on the punching roller body 1 by a high-precision computer engraving machine.

[0041] After the needles 3 are engraved on the punching roller body 1, the surfaces of the punching roller body 1 and the needles 3 need to be hardened. The hardening process can be performed by quenching, tempering and other processes.

[0042] With this design, a high-precision computer engraving machine is used to directly engrave the needle 3 on the punching roller body 1, so that the needle 3 and the punching roller body 1 can be integrally formed, which is used to reduce the preparation process and facilitate overall manufacturing. The surface of the punching roller for the low-melting-point valve bag 7 is hardened, which can improve the overall structural strength of the punching roller for the low-melting-point valve bag 7 and thus extend its service life.

[0043] The overall shape of the needle 3 is conical.

[0044] With this design, firstly, the tip of the conical needle 3 is sharp, which can accurately locate the predetermined position when punching. Compared with needles 3 of other shapes, it is easier to aim at the target point, which can greatly reduce the deviation of the punching position and ensure that the hole meets the layout and size requirements.

[0045] Secondly, its gradually thickening shape can smoothly cut into the material. As the penetration depth increases, the contact area gradually increases, making the pressure more uniform during punching, which can effectively reduce abnormal conditions such as material breakage and deformation, ensure smooth and steady punching, and improve the punching quality.

[0046] Thirdly, the conical needle 3 cuts in gradually and distributes pressure evenly when punching, and the stress on the material is also uniform. Compared with the irregular or uneven pressure needle 3, it can avoid local excessive extrusion, stretching, shearing and other damages to the material, protect the material performance and integrity, and reduce the risk of punching damage.

[0047] Finally, the holes punched by the needle 3 have regular shapes and smooth hole walls, which can provide a smoother flow channel for gas when the material needs to be breathable. Compared with irregular and rough holes, the gas and liquid exchange is less hindered, which can significantly improve the breathability of the material and meet actual needs.

[0048] The axes of the needles 3 are respectively arranged perpendicular to the axis of the punching roller body 1 .

[0049] With this design, firstly, the axis of the needle 3 is perpendicular to the axis of the punching roller body 1, which can ensure that the needle 3 penetrates the material vertically. This not only follows the punching layout and position requirements, reduces inaccurate punching caused by angle deviation, and accurately punches the expected holes to ensure consistent product quality and performance; it also makes the punching force evenly distributed around the hole, and the pressure in all directions is balanced, which can reduce burrs and rough edges on the punching edges and local deformation and cracking of the material, making the punched holes more regular and smooth, and improving the overall quality.

[0050] The maximum diameter a of the needle 3 is 0.7-0.9 mm, and preferably 0.8 mm.

[0051] The overall height b of the needle 3 is 3 to 5 mm, and the overall height b of the needle 3 is preferably 4 mm.

[0052] The distance d between each two adjacent needle groups on the punching roller body 1 is 20-25 mm.

[0053] The group distance d between each two adjacent needle groups is preferably 22.5 mm.

[0054] The needle units 2 arranged along the axial direction of the punching roller body 1 form a needle unit row, and the needle units 2 in each two adjacent needle unit rows are staggered.

[0055] The row distance f between each two adjacent rows of needle units on the punching roller body 1 is 20-25 mm.

[0056] The row distance f between each two adjacent rows of needle units is preferably 22.5 mm.

[0057] The outer diameter Φ of the punching roller body 1 is 58-62 mm, and the outer diameter Φ of the punching roller body 1 is preferably 60 mm.

[0058] The entire length L of the punching roller body 1 is 80 to 120 mm, and preferably 100 mm.

[0059] Mounting holes 4 are respectively provided at both ends of the punching roller body 1 , and support components for supporting the rotation of the punching roller body 1 are fixedly arranged in the mounting holes 4 .

[0060] The support assembly includes a support bearing fixedly installed in the mounting hole 4, and the support bearing is used to support the punching roller body 1 to rotate as a whole.

[0061] A support shaft 5 is fixedly provided in the center of the support bearing, and the support shaft 5 is used to support the entire rotation of the punching roller body 1 through the support bearing.

[0062] In this embodiment, the inner diameter of the support bearing is 20 mm, and the outer diameter of the support bearing is 40 mm.

[0063] like Figure 1-6 As shown, when in use, there are two punching roller bodies 1, and connecting plates 8 are respectively provided at both ends of the two punching roller bodies 1, and the two ends of the support shaft 5 for supporting the overall rotation of the punching roller body 1 are respectively fixedly connected to the corresponding connecting plates 8.

[0064] Positioning rollers 9 are arranged between the two connecting plates 8 and above the two punching roller bodies 1 . The positioning rollers 9 are arranged parallel to the corresponding punching roller bodies 1 , and both ends of the positioning rollers 9 are rotatably connected to the corresponding connecting plates 8 .

[0065] The punching roller body 1 , the connecting plate 8 , and the positioning roller 9 constitute a punching assembly.

[0066] Rubber rollers 6 are rotatably arranged on both sides of the punching assembly, and the axes of the rubber rollers 6 are arranged parallel to the axis of the punching roller body 1. The two rubber rollers 6 are respectively arranged on one side between the punching roller body 1 and the position positioning roller 9, and are used to clamp the punching assembly so that the rubber rollers 6 are in close contact with the corresponding punching roller body 1 and the position positioning roller 9.

[0067] The rubber roller 6 is made entirely of rubber, and the outer surface of the rubber roller 6 is elastic. The rubber roller 6 is driven to rotate by a driving device, which is a driving motor. The output end of the driving motor is connected to the roller shaft of the rubber roller 6 through a transmission assembly.

[0068] When holes need to be punched on the low-melting-point valve bag 7, the free end of the low-melting-point valve bag roll to be punched can be placed on the punching unit, and the free end can be passed between the punching unit and the rubber roller 6. Then the drive motor is started to synchronously drive the rubber roller 6 to rotate. The rotation of the rubber roller 6 can drive the punching roller body 1 and the position positioning roller 9 to rotate through the friction between the rubber roller 6 and the punching roller body 1 and the position positioning roller 9.

[0069] The rubber roller 6 drives the position positioning roller 9 to rotate, which can be used to guide the low-melting-point valve bag roll to be punched to move through between the punching unit and the rubber roller 6.

[0070] The rubber roller 6 drives the punching roller body 1 to rotate, and can be used to quickly punch microholes on the surface of the low-melting-point valve bag 7 through the contact between the needle 3 and the rubber roller 6.

[0071] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. A punching roller for low-melting-point valve bags, comprising a punching roller body (1), characterized in that: The overall shape of the punching roller body (1) is cylindrical, and a plurality of needle groups are evenly arranged on the outer surface of the punching roller body (1) at a certain distance along its axial direction, each needle group includes a plurality of needle units (2) arranged in a ring shape along the circumference of the punching roller body (1), and the needle units (2) in two adjacent needle groups on the punching roller body (1) are arranged in a staggered manner. Each needle unit (2) is composed of a plurality of needles (3) fixedly arranged on the outer surface of the punching roller body (1), and the plurality of needles (3) are arranged in a plum blossom shape.

2. The perforating roller for low-melting-point valve bags according to claim 1, characterized in that: The needle unit (2) consists of six needles, one of which (3) is located at the center, and the remaining five needles (3) are evenly distributed around the needle (3) at the center.

3. The perforating roller for low-melting-point valve bags according to claim 2, characterized in that: The center distance between the needle (3) located at the center and the five needles (3) evenly distributed around it is equal to e, and e is 3-5 mm.

4. The perforating roller for low-melting-point valve bags according to claim 1, characterized in that: The punching roller body (1) and the pricking needle (3) are connected in one piece, and the punching roller body (1) and the pricking needle (3) are cast from hard alloy.

5. The perforating roller for low-melting-point valve bags according to claim 4, characterized in that: The needles (3) on the punching roller body (1) are engraved on the punching roller body (1) by a high-precision computer engraving machine.

6. The perforating roller for low-melting-point valve bags according to claim 1, characterized in that: The overall shape of the needle (3) is conical.

7. The perforating roller for low-melting-point valve bags according to claim 1, characterized in that: The axes of the needles (3) are respectively arranged perpendicular to the axes of the punching roller body (1).

8. The perforating roller for low-melting-point valve bags according to claim 1, characterized in that: The needle units (2) arranged along the axial direction of the punching roller body (1) form a needle unit row, and the needle units (2) in every two adjacent needle unit rows are respectively arranged in a staggered manner.

Images