A press mechanism and air column machine for efficient sealing

Abstract

The utility model relates to a gas column machine for producing buffer packaging material provides a kind of for the moulding mechanism and gas column machine of high efficiency sealing, the moulding mechanism includes upper pressure wheel, lower supporting wheel and elastic pressure mechanism, the outer contour of upper pressure wheel and lower supporting wheel is along the arc inner recess of central opening in axial direction, to form the embracing surface matched with the outer circle of inflation rod;The elastic pressure mechanism cooperates with the upper pressure wheel, the elastic pressure mechanism applies thrust to the upper pressure wheel along the direction towards inflation rod, the utility model is by using the inner recess between upper pressure wheel and lower supporting wheel and the joint action of "embracing" clamping inflation rod, upper pressure wheel produces adjustable clamping force to lower supporting wheel under the action of elastic pressure mechanism, realize "clamping-gas locking" function, solve the problem of air leakage, insufficient gas, unsatisfactory gas column caused by "clamping not tight".

Description

Technical Field

[0001] This utility model relates to an air column machine for producing cushioning packaging materials, and more particularly to a compression molding mechanism and an air column machine for efficient sealing. Background Technology

[0002] An air column machine is a machine used to produce "air column bags" as cushioning packaging materials. Through steps such as air film unwinding, inflation forming, heat sealing, and cutting, PE film is processed into rows of independent air column bags, which have functions such as cushioning, shock absorption, and pressure resistance. They are widely used in e-commerce, logistics, and electronic product packaging.

[0003] Currently, the film pressing mechanism of air column presses generally uses a "set of fixed-shaft cylindrical rollers" structure to clamp and pull the air film. This structure consists of two parallel metal rollers: one driving roller is driven by a motor via a synchronous belt or chain, and the other driven roller is fixedly connected to the frame through a bearing housing, relying on springs or bolts to apply constant pressure. The air film is clamped between the two cylindrical rollers and conveyed backward, simultaneously completing processes such as inflation, heat sealing, and traction forming.

[0004] However, in actual production, this type of compression molding mechanism may "not clamp tightly" under the pressure of inflation, which can easily lead to gaps between adjacent air columns. During inflation, gas leaks along the gaps, resulting in insufficient air volume and ultimately causing the air columns to collapse and become incomplete. Utility Model Content

[0005] This invention aims to solve the problems of existing film pressing mechanisms, such as "not clamping tightly", easy air leakage, insufficient air volume, and incomplete air column.

[0006] To solve the above-mentioned technical problems, this utility model provides a compression molding mechanism for efficient sealing, including an upper pressure roller, a lower support roller, and an elastic pressing mechanism. The outer contours of the upper pressure roller and the lower support roller are provided with arc-shaped inner grooves along the axial center to form a circumferential surface that matches the outer circle of the inflator rod. The elastic pressing mechanism cooperates with the upper pressure roller and applies a pushing force to the upper pressure roller in the direction toward the inflator rod.

[0007] In a preferred embodiment, the outer contours of the upper pressure roller and the lower support roller are both made of a soft elastic material; the soft elastic material is soft silicone.

[0008] In a preferred embodiment, the molding mechanism further includes an upper shaft seat and a lower shaft seat, the mounting shafts of the upper pressure roller and the lower support roller are respectively passed through the upper shaft seat and the lower shaft seat, and drive wheels are respectively fixed thereon; the two drive wheels of the upper pressure roller and the lower support roller mesh with each other.

[0009] In a preferred embodiment, the mounting shaft of the lower support roller is horizontally arranged, and the mounting shaft of the upper pressure roller is inclined downward at a certain angle α relative to the mounting shaft of the lower support roller, so that the opening directions of the inner grooves of the upper pressure roller and the lower support roller are not parallel in space.

[0010] In a preferred embodiment, the included angle α is set between 0° and 5°.

[0011] In a preferred embodiment, the elastic clamping assembly includes guide posts, a limiting plate, and a spring; the guide posts pass through the upper shaft seat and the lower shaft seat, and two guide posts are symmetrically arranged on the left and right sides of the shaft seat; the limiting plate is fixed to the top of the guide posts and is fixedly connected to the two guide posts; the spring is coaxially sleeved outside the guide posts, and the two sides of the spring abut against the limiting plate and the upper shaft seat respectively.

[0012] In a preferred embodiment, the spring is compressed and stores energy during assembly. Under the limitation of the limiting plate, the restoring force of the spring always acts downward on the upper shaft seat and is transmitted to the upper pressure wheel through the mounting shaft of the upper pressure wheel.

[0013] In a preferred embodiment, the upper shaft seat has protruding bosses on both sides, one end of the spring abutting against the bosses; the guide post passes through the bosses.

[0014] This utility model also provides an air column machine, including two sets of the aforementioned molding mechanisms. The air column machine includes a mounting plate and an inflation rod. The mounting plate is used to support and fix the molding mechanism. The inflation rod passes through the inner grooves of the upper pressure roller and the lower support roller. The two sets of molding mechanisms are respectively arranged at the front and rear ends of the inflation rod, and the inflation rod has an air hole in the middle rod part of the two sets of molding mechanisms.

[0015] This utility model also provides an air column machine, including two sets of the aforementioned molding mechanisms. The air column machine includes a mounting plate and an inflation rod. The mounting plate is used to support and fix the molding mechanism. The inflation rod passes through the inner grooves of the upper pressure roller and the lower support roller. A first set of molding mechanisms, a second set of molding mechanisms, and a pressure roller assembly are arranged sequentially along the axial direction of the inflation rod. The surface of the inflation rod between the first set of molding mechanisms and the second set of molding mechanisms has a row of first inflation holes along the axial direction, forming a first inflation section. The surface of the inflation rod between the second set of molding mechanisms and the pressure roller assembly has a second inflation hole along the axial direction, forming a second inflation section. The diameter of the first inflation hole is smaller than the diameter of the second inflation hole.

[0016] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0017] 1. This utility model uses the upper pressure roller and the lower support roller, as well as the inner groove between them, to "encircle" and clamp the inflation rod. Under the action of the elastic clamping mechanism, the upper pressure roller generates an adjustable clamping force on the lower support roller, realizing the "clamping-locking" function and solving the problems of air leakage, insufficient air volume, and incomplete air column caused by "not clamping tightly".

[0018] 2. This utility model uses the downward axial tilt of the upper pressure roller to make the opening direction of its inner groove "space cross" with the lower support roller, forming a progressive wedging effect, enhancing the self-locking ability, and further improving the clamping force and sealing performance.

[0019] 3. This utility model further improves the sealing uniformity of the entire inflatable rod by setting a set of compression molding mechanisms at the front and rear of the inflatable rod to form a "double clamping", completely eliminating single-point air leakage. In addition, the air hole in the middle rod can concentrate air between the double clamping points, improving the inflation efficiency. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the upper pressure roller or lower support roller of the pressing mechanism in the first embodiment of this utility model;

[0021] Figure 2 This is a front view of the molding mechanism in the first embodiment of this utility model;

[0022] Figure 3 This is a side view of the molding mechanism (with the inflation tube not passing through the upper and lower inner grooves) in the first embodiment of this utility model;

[0023] Figure 4 This is a side view of the molding mechanism (the air tube passes through the upper and lower inner grooves) in the first embodiment of this utility model;

[0024] Figure 5 This is a structural diagram of the film pressing mechanism installed on the air column machine in the second embodiment of this utility model;

[0025] Figure 6 This is a structural diagram of two sets of compression molding mechanisms distributed along the axial direction of the inflatable rod in the third embodiment of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Upper pressure roller; 11. Inner groove; 12. Mounting shaft; 13. Drive wheel; 2. Lower support roller; 3. Elastic clamping mechanism; 31. Guide post; 32. Limiting plate; 33. Spring; 4. Upper shaft seat; 41. Boss; 5. Lower shaft seat; 6. Inflatable rod; 61. Air hole; 62. First inflation hole; 63. Second inflation hole; 7. Mounting plate; 101. First set of pressing mechanism; 102. Second set of pressing mechanism; 103. Pressure roller assembly. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] First Embodiment

[0032] refer to Figures 1-4 This embodiment provides a compression molding mechanism for efficient sealing. This compression molding mechanism employs an elastic compression molding mechanism, including an upper pressure roller 1, a lower support roller 2, and an elastic clamping mechanism 3. As shown... Figure 1 The outer contours of both the upper pressure roller 1 and the lower support roller 2 are made of soft, elastic material, and an arc-shaped inner groove 11 is formed in the center of the axial direction, creating a circumferential surface that matches the outer circle of the inflatable rod 6. When the air film is fitted onto the inflatable rod 6 and moves forward with it, the elastic pressing component continuously pushes the upper pressure roller 1 towards the inflatable rod 6, so that the soft concave surface of the arc-shaped inner groove 11 flexibly fits the circumference of the inflatable rod 6 at 360°, automatically compensating for fluctuations in the air film thickness and eliminating local gaps. As a result, the air column cavity is reliably sealed, there is no gas leakage, and the bag is full and upright.

[0033] The soft elastic material can be made of soft silicone, which can ensure the elastic deformation required for flexible fit, achieve reliable sealing, and significantly reduce air leakage. The outer ring of the upper pressure roller 1 is made of soft silicone material, and the inner ring is made of hard metal material. The lower support roller 2 has an outer ring made of soft silicone material and an inner ring made of hard metal material.

[0034] like Figure 3 The molding mechanism also includes an upper shaft seat 4 and a lower shaft seat 5. The mounting shafts 12 of the upper pressure roller 1 and the lower support roller 2 are respectively passed through the upper shaft seat 4 and the lower shaft seat 5, and drive wheels 13 are fixedly mounted on them respectively. The drive wheels 13 are located at the end of the mounting shaft 12 that passes through the shaft seat, and the drive wheels 13 of the two wheels mesh with each other to achieve synchronous rotation. The drive wheel 13 of the lower support roller 2 is connected to the primary transmission wheel in the air column machine by a synchronous belt to achieve synchronous rotation.

[0035] The mounting shaft 12 of the lower support roller 2 is horizontally positioned, and the mounting shaft 12 of the upper pressure roller 1 is inclined downward at a certain angle α relative to the mounting shaft 12 of the lower support roller 2. The angle α is set between 0° and 5°, causing the opening directions of the inner groove 11 of the upper pressure roller 1 and the lower support roller 2 to be non-parallel in space. Therefore, the outer wall of the inner groove 11 of the upper pressure roller 1 exerts a continuous squeezing force on the inflation rod 6; under the action of the elastic clamping assembly, the upper pressure roller 1 always maintains a downward pressure F. Figure 4 The asymmetrical groove structure is stretched open when the inflator rod 6 is inserted, and the outer soft silicone elastically deforms accordingly, wrapping around and tightly fitting the inflator rod 6 in 360° to achieve a reliable seal.

[0036] like Figure 2 The elastic clamping assembly includes a guide post 31, a limiting plate 32, and a spring 33. The guide post 31 is a stepped cylinder and passes through the upper shaft seat 4 and the lower shaft seat 5. The guide post 31 is symmetrically arranged on the left and right sides of the shaft seat, and provides a guiding function for the vertical movement of the upper pressure roller 1. The limiting plate 32 is a flat plate structure and is fixed to the top of the guide post 31 to limit the upper limit position of the upper pressure roller 1. The spring 33 is coaxially sleeved on the outside of the guide post 31. The upper shaft seat 4 has protruding bosses 41 on both sides for mounting the spring 33. The guide post 31 passes through the bosses 41. The two sides of the spring 33 abut against the limiting plate 32 and the bosses 41, respectively. The spring 33 can be a cylindrical compression spring structure, and the spring 33 provides a downward force F to the upper pressure roller 1.

[0037] The upper shaft seat 4 is a movable shaft seat, driven by the compression spring 33 to slide up and down along the guide post 31. The lower shaft seat 5 is fixed. The spring 33 is compressed and stores energy during assembly. Driven by the limiting plate 32 and the spring 33, the restoring force of the spring 33 always acts downward on the upper shaft seat 4, and is transmitted to the upper pressure roller 1 through the upper shaft seat 4, forming a constant downward pressure F. This pressure can automatically compensate for changes in the air film thickness, always ensuring flexible fit and reliable sealing.

[0038] Second Embodiment

[0039] like Figure 5 The air column machine provided in this embodiment uses the molding mechanism mentioned in the first embodiment, which is mainly used in the air column machine. The air column machine includes a mounting plate 7 and an inflation rod 6. The mounting plate 7 is a metal flat plate structure and serves as the overall frame of the air column machine. The mounting plate 7 is used to support and fix the molding mechanism, providing an installation position for the molding mechanism. The upper shaft seat 4 and lower shaft seat 5 of the molding mechanism are both installed on the rear side of the mounting plate 7. The mounting shaft 12 of the upper pressure roller 1 and the lower support roller 2 passes through the mounting plate 7 and extends forward, so that the upper pressure roller 1 and the lower support roller 2 are suspended on the front side of the mounting plate 7 and directly interact with the inflation rod 6 and the air film.

[0040] The inflatable rod 6 is a hollow cylinder with several air holes 61 evenly distributed around its middle section for inflating the air film. The inflatable rod 6 passes through the arc-shaped inner groove 11 of the upper pressure roller 1 and the lower support roller 2, providing a path for the air film to travel.

[0041] like Figure 5 The air column machine includes two sets of molding mechanisms, which are respectively located on both sides of the mounting plate 7 and at the front and rear ends of the inflation rod 6. An air hole 61 is opened in the middle section of the inflation rod 6 between the two molding mechanisms. During operation, the front and rear molding mechanisms form a double elastic ring seal around the air film, constituting an axially closed cavity. After the gas is filled through the air hole 61, it is completely locked within this closed cavity, preventing axial leakage and ensuring the air column bag remains full and reliably sealed throughout.

[0042] The air column machine also includes a film guiding device and a hot-press sealing device. The two sets of pressing mechanisms constitute an air-sealing device. Along the transport of the air film, the film guiding device, the air-sealing device, and the hot-press sealing device are set in sequence. The film guiding device is responsible for smoothly guiding the double-layer air film into the subsequent station. The air-sealing device consists of two sets of pressing mechanisms, with an air-inflating rod 6 passing through it. The front end is a conical sealing end, which facilitates the insertion of the film material. The hot-press sealing device is located downstream of the air-sealing device and completes the transverse heat sealing and cutting.

[0043] The air outlet 61 in the middle section of the inflator rod 6 is located between the front and rear pressing mechanisms. After passing through the film guiding device, the film enters the air-sealing device. The upper and lower soft wheels surround and press the film against the outer wall of the inflator rod 6, forming a continuous and adjustable airtight seal. This prevents gas from escaping forward and avoids airflow from entering the film guiding device and causing additional resistance. Subsequently, the gas fills the film through the air outlet 61 to form an air column bag. The bag is fully inflated before entering the heat sealing station, ensuring a smooth and wrinkle-free seal during heat sealing, significantly reducing the risk of film breakage or sealing defects.

[0044] The two sets of compression molding mechanisms achieve compression of the inflatable film at the front end of the hot-press sealing film. The air hole 61 in the middle section of the inflation rod 6 inflates the air mold. The compression molding mechanism forms an airtight seal with the air film through the compression force of the upper pressure roller 1 and the lower support roller 2. The air volume in the air column bag to be hot-pressed near the sealing opening is effectively preserved, ensuring that the air column bag is full during hot pressing. At the same time, the airflow cannot overflow to the front guiding film device, which will not increase the resistance of the air film's movement, thereby reducing the risk of air film breakage, sealing wrinkles, etc.

[0045] Third Embodiment

[0046] like Figure 6 The air column machine provided in this embodiment uses the molding mechanism mentioned in the first embodiment. The air column machine includes a mounting plate 7 and an inflation rod 6. The mounting plate 7 is a flat metal plate structure and serves as the overall frame of the air column machine. It supports and fixes the molding mechanism, providing a mounting position for it. The upper shaft seat 4 and lower shaft seat 5 of the molding mechanism are both mounted on the rear side of the mounting plate 7. The mounting shafts 12 of the upper pressure roller 1 and the lower support roller 2 pass through the mounting plate 7 and extend forward, suspending the upper pressure roller 1 and the lower support roller 2 on the front side of the mounting plate 7, allowing them to directly interact with the inflation rod 6 and the air film.

[0047] The inflatable rod 6 is a hollow cylinder with several air holes 61 evenly distributed around its middle section for inflating the air film. The inflatable rod 6 passes through the arc-shaped inner groove 11 of the upper pressure roller 1 and the lower support roller 2, providing a path for the air film to travel.

[0048] The air column machine includes two sets of molding mechanisms. A first set of molding mechanisms 101, a second set of molding mechanisms 102, and a pressure roller assembly 103 are arranged sequentially along the axial direction of the air column 6. The surface of the air column 6 between the first set of molding mechanisms 101 and the second set of molding mechanisms 102 is provided with a row of first air holes 62 along the axial direction to form a first air-inflating section. The surface of the air column 6 between the second set of molding mechanisms 102 and the pressure roller assembly 103 is provided with second air holes 63 along the axial direction to form a second air-inflating section. The diameter of the first air holes 62 is smaller than the diameter of the second air holes 63.

[0049] The first inflation port 62 has a smaller diameter. When the first inflation stage is performed, the pressure of the airflow ejected from the first inflation stage is relatively high, which can better open the air film for pre-inflation. The second inflation port 63 has a larger diameter. When the second inflation stage is performed, the second inflation stage provides a lower pressure airflow to inflate the pre-inflated air film until it is full, so as to form a full air column bag.

[0050] Because the inflation pressure of the first inflation section is relatively large, a first set of molding mechanisms 101 and a second set of molding mechanisms 102 are set on both sides of the first inflation section. The two sets of molding mechanisms form a double elastic ring seal for the air film at the first inflation section, forming an axial closed cavity. When a large air pressure is rushed into the air film, it is completely locked in the closed cavity, with no axial leakage. This prevents the gas from overflowing to the front guide film device and the rear second inflation section, thus not increasing the resistance of the air film's movement and reducing the risk of air film breakage, sealing wrinkles, etc.

[0051] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A compression molding mechanism for efficient sealing, characterized in that: It includes an upper pressure roller, a lower support roller, and an elastic pressing mechanism. The outer contours of the upper pressure roller and the lower support roller are provided with arc-shaped inner grooves along the axial center to form a circumferential surface that matches the outer circle of the inflatable rod. The elastic pressing mechanism cooperates with the upper pressure roller and applies a pushing force to the upper pressure roller in the direction toward the inflatable rod.

2. The compression molding mechanism for efficient sealing according to claim 1, characterized in that: The outer contours of the upper pressure roller and the lower support roller are both made of soft elastic material; the soft elastic material is soft silicone.

3. The compression molding mechanism for efficient sealing according to claim 1, characterized in that: The molding mechanism also includes an upper shaft seat and a lower shaft seat. The mounting shafts of the upper pressure roller and the lower support roller are respectively passed through the upper shaft seat and the lower shaft seat, and drive wheels are respectively fixed thereon. The two drive wheels of the upper pressure roller and the lower support roller mesh with each other.

4. A compression molding mechanism for efficient sealing according to claim 3, characterized in that: The mounting shaft of the lower support roller is horizontally set, and the mounting shaft of the upper pressure roller is set at a certain downward angle α relative to the mounting shaft of the lower support roller, so that the opening direction of the inner groove of the upper pressure roller and the lower support roller are not parallel in space.

5. A compression molding mechanism for efficient sealing according to claim 4, characterized in that: The included angle α is set between 0° and 5°.

6. A compression molding mechanism for efficient sealing according to claim 3, characterized in that: The elastic clamping assembly includes guide posts, a limiting plate, and a spring; the guide posts pass through the upper and lower shaft seats, and two guide posts are symmetrically arranged on the left and right sides of the shaft seats; the limiting plate is fixed to the top of the guide posts and is fixed to the two guide posts; the spring is coaxially sleeved on the outside of the guide posts, and the two sides of the spring abut against the limiting plate and the upper shaft seat respectively.

7. A compression molding mechanism for efficient sealing according to claim 6, characterized in that: The spring is compressed and stores energy during assembly. Under the limitation of the limiting plate, the restoring force of the spring always acts downward on the upper shaft seat and is transmitted to the upper pressure wheel through the mounting shaft of the upper pressure wheel.

8. A compression molding mechanism for efficient sealing according to claim 6, characterized in that: The upper shaft seat has protruding bosses on both sides, and one end of the spring abuts against the boss; the guide post passes through the boss.

9. An air column machine, characterized in that: The device includes two sets of molding mechanisms as described in any one of claims 1-8. The air column machine includes a mounting plate and an inflation rod. The mounting plate is used to support and fix the molding mechanism. The inflation rod passes through the inner grooves of the upper pressure roller and the lower support roller. The two sets of molding mechanisms are respectively arranged at the front and rear ends of the inflation rod, and the inflation rod has an air hole in the middle rod portion of the two sets of molding mechanisms.

10. An air column machine, characterized in that: The device includes two sets of molding mechanisms as described in any one of claims 1-8. The air column machine includes a mounting plate and an inflation rod. The mounting plate is used to support and fix the molding mechanism. The inflation rod passes through the inner grooves of the upper pressure roller and the lower support roller. A first set of molding mechanisms, a second set of molding mechanisms, and a pressure roller assembly are arranged sequentially along the axial direction of the inflation rod. The surface of the inflation rod between the first set of molding mechanisms and the second set of molding mechanisms is provided with a row of first inflation holes along the axial direction to form a first inflation section. The surface of the inflation rod between the second set of molding mechanisms and the pressure roller assembly is provided with a second inflation hole along the axial direction to form a second inflation section. The diameter of the first inflation hole is smaller than the diameter of the second inflation hole.

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