Anti-stick welding nozzle device

Abstract

The present application belongs to the field of packaging technology, and discloses an anti-sticking welding nozzle device, including a base platform and a pneumatic device located above the base platform, a hot knife mechanism is movably connected to the relative position between the base platform and the pneumatic device, and an anti-sticking mechanism is arranged on the outside of the hot knife mechanism on the base platform, and the hot knife mechanism includes heating blocks respectively fixedly connected to the base platform and the pneumatic device, and the opposite end surfaces of the two heating blocks are respectively detachably connected with matching suction nozzle hot knives, and the anti-sticking mechanism includes two groups of reset components and two layers of temperature-resistant hot cloths distributed up and down. The present application solves the problem of difficult welding nozzles for composite film bags with surface layers made of heat-resistant materials such as polyethylene or polypropylene by using the combination of the hot knife mechanism and the anti-sticking mechanism, and avoids problems such as adhesion, scalding, wrinkling, and virtual sealing caused by excessive temperature or uneven pressure, so that product quality and production efficiency are greatly improved.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and more specifically, to an anti-sticking welding nozzle device. Background Art

[0002] The spout bag is a common composite flexible packaging bag type, which is widely used in the fields of food, daily chemicals, etc., such as the common soy milk bags, ketchup bags, laundry detergent bags, etc. This spout bag is composed of a plastic spout and a composite film bag. The spout is welded in the composite bag by high-temperature hot stamping. The hot stamping temperature is usually 160-200℃, which means that the surface needs to be made of high-temperature resistant materials, such as PET or PA. In recent years, with the development of material technology and the strengthening of environmental awareness, the demand for single recyclable packaging of PP or PE has increased. Among them, the single recyclable spout bag is one of the industry problems. Due to the low melting point of PP and PE materials themselves, the high temperature during the nozzle welding process will cause the surface material to melt and produce adhesion problems, which will seriously affect the mechanical strength of the material. In addition, over time, the hot knife will accumulate adhesion foreign matter, affect thermal conductivity, and easily produce virtual sealing problems, which seriously affect the appearance, sealing and functionality of the product. Therefore, the development of an anti-adhesion nozzle device can solve the problem that the composite film bag with non-temperature-resistant surface materials cannot be welded, and can ensure that the appearance and quality of the nozzle can meet the needs of the market. Utility Model Content

[0003] In order to solve the above problems, the present application provides an anti-sticking welding nozzle device.

[0004] The anti-sticking welding nozzle device provided in the present application adopts the following technical solution:

[0005] A device for preventing welding nozzles from sticking comprises a base platform and a pneumatic device located above the base platform, a hot knife mechanism is movably connected to the relative position between the base platform and the pneumatic device, an anti-sticking mechanism is arranged on the outside of the hot knife mechanism on the base platform, the hot knife mechanism comprises heating blocks respectively fixedly connected to the base platform and the pneumatic device, the opposite end surfaces of the two heating blocks are respectively detachably connected with matching suction nozzle hot knives, the anti-sticking mechanism comprises two groups of reset components and two layers of temperature-resistant hot cloths distributed up and down, the reset components are symmetrically arranged on both sides of the hot knife mechanism, the temperature-resistant hot cloths are passed through between the two suction nozzle hot knives, and the two ends thereof are respectively connected to the reset components.

[0006] Furthermore, the reset assembly includes a rotating shaft seat and a connecting rod, the rotating shaft seat is fixedly mounted on the base platform, the connecting rod is rotatably connected to the top of the rotating shaft seat, the top of the connecting rod is connected to the base platform through a spring, and the two ends of the heat-resistant ironing cloth are respectively connected to the connecting rods on both sides.

[0007] Through the above technical solution, the pneumatic equipment drives the ironing knife mechanism to press together. After pressing together, the heat-resistant ironing cloth adheres to the knife edge and the product surface to produce deformation. The distance change caused by the deformation of the ironing cloth is compensated by the swing of the connecting rod, and reset is achieved by the spring.

[0008] Furthermore, the reset assembly includes a support seat, which is horizontally provided with two slide grooves, each of which is slidably connected with a slider, and the slider is connected to the slide groove by a spring, and the two ends of the heat-resistant ironing cloth are respectively connected to the sliders on both sides.

[0009] Through the above technical solution, the pneumatic equipment drives the ironing knife mechanism to press together. After pressing together, the heat-resistant ironing cloth adheres to the blade and the product surface to produce deformation. The sliding of the slider compensates for the distance change caused by the deformation of the ironing cloth, and reset is achieved through the spring.

[0010] Furthermore, both ends of the temperature-resistant ironing cloth are wound and connected with an adjusting reel, and are adjustably and movably connected to the reset component through the adjusting reel.

[0011] Through the above technical solution, the ironing cloth working area can be quickly adjusted by rotating the adjustment reel, making it easy to replace the ironing cloth.

[0012] Furthermore, the heat-resistant ironing cloth is polytetrafluoroethylene high-temperature cloth.

[0013] Through the above technical solution, the working temperature of the polytetrafluoroethylene high temperature cloth is -150 to 350°C, and it has good corrosion resistance and wear resistance.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] The present application solves the problem of difficulty in welding nozzles of composite film bags whose surface layers are made of heat-sensitive materials such as polyethylene or polypropylene by using a combination of a hot knife mechanism and an anti-sticking mechanism, thereby avoiding problems such as adhesion, scalding, wrinkling, and false sealing caused by excessive temperature or uneven pressure, thereby greatly improving product quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of Example 1 of the present application;

[0017] Figure 2 This is a schematic diagram of the use status of Example 1 of the present application;

[0018] Figure 3 This is a structural diagram of Example 2 of the present application.

[0019] Description of the numbers in the figure:

[0020] 1. Base platform; 2. Pneumatic equipment; 3. Hot knife mechanism; 31. Heating block; 32. Suction nozzle hot knife; 4. Anti-sticking mechanism; 41. Reset assembly; 411. Rotating shaft seat; 412. Connecting rod; 413. Support seat; 414. Slide groove; 415. Sliding block; 42. Heat-resistant hot cloth; 5. Adjusting reel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Embodiment 1:

[0025] The present application is further described in detail below in conjunction with the accompanying drawings.

[0026] The embodiment of the present application discloses an anti-sticking welding nozzle device, including a base platform 1 and a pneumatic device 2 located above the base platform 1. A hot knife mechanism 3 is movably connected to the relative position between the base platform 1 and the pneumatic device 2. The base platform 1 is provided with an anti-sticking mechanism 4 on the outer side of the hot knife mechanism 3. The hot knife mechanism 3 includes heating blocks 31 respectively fixedly connected to the base platform 1 and the pneumatic device 2. The opposite end surfaces of the two heating blocks 31 are respectively detachably connected with matching suction nozzle hot knives 32. The anti-sticking mechanism 4 includes two groups of reset components 41 and two layers of temperature-resistant hot cloths 42 distributed up and down. The reset components 41 are symmetrically arranged on both sides of the hot knife mechanism 3. The temperature-resistant hot cloths 42 pass through between the two suction nozzle hot knives 32, and their two ends are respectively connected to the reset components 41.

[0027] The upper and lower nozzle hot knives 32 are preferably made of brass molds according to the nozzle size, so that the hot knives have better thermal conductivity. The upper and lower heating blocks 31 are both built-in high-precision temperature control sensors, and the temperature deviation is controlled within ±1°C. The heat-resistant hot cloth 42 is preferably polytetrafluoroethylene high-temperature cloth, with an operating temperature of -150 to 350°C and good corrosion resistance and wear resistance.

[0028] See also Figure 1 and Figure 2 The reset assembly 41 includes a shaft seat 411 and a connecting rod 412. The shaft seat 411 is fixedly mounted on the base platform 1. The connecting rod 412 is rotatably connected to the top of the shaft seat 411. The top of the connecting rod 412 is connected to the base platform 1 through a spring. The two ends of the heat-resistant ironing cloth 42 are respectively connected to the connecting rods 412 on both sides. The pneumatic device 2 drives the ironing knife mechanism 3 to press. After pressing, the heat-resistant ironing cloth 42 is deformed by fitting the knife edge and the product surface. The connecting rod 7 swings inward as the heat-resistant ironing cloth 8 is deformed. When the hot sealing action is completed and the pneumatic device 2 is reset, the connecting rod 7 will be reset to a vertical state through the spring 11 device.

[0029] Preferably, both ends of the heat-resistant ironing cloth 42 are wound with an adjusting reel 5, and are adjustably and movably connected to the reset assembly 41 through the adjusting reel 5. Since the high-temperature ironing cloth needs to be replaced or the working area adjusted after long-term use, the adjusting reel 5 is designed to facilitate the replacement and fixing of the ironing cloth, and the ironing cloth working area can be quickly adjusted by rotating the adjusting reel 5.

[0030] Embodiment 2:

[0031] The difference between this embodiment and embodiment 1 is that:

[0032] See also Figure 3The reset assembly 41 includes a support seat 413, and two slide grooves 414 are horizontally opened on the support seat 413. Slide blocks 415 are slidably connected in the slide grooves 414. The slide blocks 415 are connected to the slide grooves 414 through springs, and the two ends of the heat-resistant ironing cloth 42 are respectively connected to the slide blocks 415 on both sides. When in use, the pneumatic device 2 drives the ironing knife mechanism 3 to press, and after pressing, the heat-resistant ironing cloth 42 is deformed by fitting the knife edge and the product surface. The sliding of the slide block 415 compensates for the distance change caused by the deformation of the ironing cloth, and reset is achieved through the spring.

[0033] The implementation principle of an anti-sticking welding nozzle device in the embodiment of the present application is:

[0034] When using, select a suitable nozzle hot knife 32 and install it, set the heating temperature and hot pressing time, and adjust the cylinder pressure. Wrap the heat-resistant hot cloth 42 on the adjustment reel 5, and reserve a sufficient length of heat-resistant hot cloth 42; insert the welding part of the plastic nozzle into the prefabricated composite film bag, and place it between the two layers of heat-resistant hot cloth 42, centered on the left and right, so that the welding part matches the upper and lower nozzle hot knives 32; start the cylinder of the pneumatic device 2 to press down, and the two nozzle hot knives 32 bite each other, and through heat transfer, the nozzle and the inner layer of the film bag are completely fused.

[0035] During the lamination process, the heat-resistant hot cloth 42 is sandwiched between the nozzle hot knife 32 and the nozzle bag to play an anti-sticking and anti-pollution role, and the flexible heat-resistant hot cloth 42 can make the pressure more uniform, avoiding false sealing leakage caused by uneven pressure. Since the heat-resistant hot cloth 42 is deformed after lamination, the distance change caused by the deformation of the hot cloth is compensated by the setting of the reset component 41. When the hot sealing action is completed and the cylinder of the pneumatic device 2 is reset, the heat-resistant hot cloth 8 will also be restored to its initial state through the setting of the reset component 41. After working for a long time, the material in the hot sealing area of ​​the heat-resistant hot cloth 42 is worn. The reserved heat-resistant hot cloth 42 is released by rotating the adjustment reel 5, and it can continue to be used after adjusting the hot cloth working area.

[0036] After testing and verification, the anti-sticking welding nozzle device provided by the utility model can weld composite film bags with surface layers of MDOPE, BOPE, HDPE, OPP, and CPP, and the welding part is smooth and flat without burrs, and its welding strength can also pass the sealing test and the pressure resistance test. Compared with the welding nozzle machine without the anti-sticking linkage mechanism, its production efficiency is increased by 50%.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-sticking welding nozzle device, comprising a base platform (1) and a pneumatic device (2) located above the base platform (1), wherein a hot knife mechanism (3) is movably connected to the relative position between the base platform (1) and the pneumatic device (2), and characterized in that: The base platform (1) is provided with an anti-sticking mechanism (4) on the outer side of the ironing knife mechanism (3); the ironing knife mechanism (3) comprises heating blocks (31) respectively fixedly connected to the base platform (1) and the pneumatic device (2); the opposite end surfaces of the two heating blocks (31) are respectively detachably connected with matching suction nozzle ironing knives (32); the anti-sticking mechanism (4) comprises two groups of reset components (41) and two layers of temperature-resistant ironing cloth (42) distributed up and down; the reset components (41) are symmetrically arranged on both sides of the ironing knife mechanism (3); the temperature-resistant ironing cloth (42) passes through between the two suction nozzle ironing knives (32), and its two ends are respectively connected to the reset components (41).

2. The anti-sticking welding nozzle device according to claim 1, characterized in that: The reset assembly (41) comprises a rotating shaft seat (411) and a connecting rod (412); the rotating shaft seat (411) is fixedly mounted on the base platform (1); the connecting rod (412) is rotatably connected to the top of the rotating shaft seat (411); the top of the connecting rod (412) is connected to the base platform (1) via a spring; and the two ends of the heat-resistant ironing cloth (42) are respectively connected to the connecting rods (412) on both sides.

3. The anti-sticking welding nozzle device according to claim 1, characterized in that: The reset assembly (41) comprises a support seat (413), two slide grooves (414) are horizontally opened on the support seat (413), and sliders (415) are slidably connected in the slide grooves (414). The sliders (415) are connected to the slide grooves (414) by springs, and the two ends of the heat-resistant ironing cloth (42) are respectively connected to the sliders (415) on both sides.

4. An anti-sticking welding nozzle device according to any one of claims 1 to 3, characterized in that: Both ends of the heat-resistant ironing cloth (42) are wound and connected with an adjusting reel (5), and are adjustably and movably connected to the reset assembly (41) via the adjusting reel (5).

5. The anti-sticking welding nozzle device according to claim 1, characterized in that: The heat-resistant ironing cloth (42) is a polytetrafluoroethylene high-temperature cloth.

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