A blowing device for food packaging bags

Abstract

The application discloses a blowing device for food packaging bags, which comprises a mounting plate, the end of the mounting plate is provided with a direct current motor, the output end of the direct current motor is engaged with a rotary joint, a sealing disc is arranged on the lower surface of the rotary joint, and a blowing assembly is arranged at the middle position of the sealing disc; the blowing assembly is composed of a blowing guide rod and a blowing head, the blowing guide rod is a hollow structure, penetrates through the mounting plate, the rotary joint and the sealing disc, and the end of the blowing guide rod is the blowing head which guides the oblique upward airflow, the application adopts a rotary blowing design, the whole blowing assembly is driven to rotate by the direct current motor, and the blowing hole on the blowing head is designed to be inclined by 15 DEG, so that the airflow is filled into the packaging bag obliquely upward, direct blowing to the materials in the bag is avoided, the influence on the materials in the bag is effectively reduced, and the problems of single airflow direction and uneven distribution of the traditional fixed blowing device are solved completely.

Description

Technical Field

[0001] This application relates to the field of food packaging technology, specifically to an air blowing device for food packaging bags. Background Technology

[0002] With the rapid development of the food industry, inflatable packaging technology has been widely used in the food packaging field. Firstly, traditional fixed inflation devices result in a single, fixed airflow direction during inflation, which can easily lead to uneven gas distribution within the packaging bag. This is especially problematic for irregularly shaped or large-volume bags, often resulting in localized over-inflation while other areas remain under-inflated. This not only affects the packaging's appearance but may also reduce its sealing performance.

[0003] Secondly, traditional blowing devices typically use a simple straight tube or single-hole structure for their blowing heads, resulting in high airflow concentration. This can easily impact food, especially lightweight puffed foods such as potato chips and popcorn, which are easily blown apart or broken by the airflow. Furthermore, the limited airflow pattern makes it difficult to adapt to the needs of packaging bags of different sizes and shapes.

[0004] Furthermore, existing equipment lacks sufficient consideration in its contamination prevention design. Due to the extremely high hygiene requirements of food packaging, the entry of any external contaminants can cause food contamination. This is especially true when handling oily foods such as spicy snacks and fried products, where airflow impact can easily cause oil spillage, resulting not only in food waste but also potential environmental contamination. Traditional air-blowing devices lack effective protective measures, particularly when handling oily foods like spicy snacks and fried products, where airflow impact can easily cause oil spillage, resulting in food waste and potential environmental contamination. Summary of the Invention

[0005] The technical problem to be solved by this application is to overcome the existing defects and provide an air blowing device for food packaging bags, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: an air blowing device for a food packaging bag, including a mounting plate, a DC motor is provided at the end of the mounting plate, a rotary joint is engaged at the output end of the DC motor, a sealing plate is provided close to the lower surface of the rotary joint, and an air blowing component is provided in the middle of the sealing plate.

[0007] The air blowing assembly consists of an air blowing guide rod and an air blowing end. The air blowing guide rod is a hollow structure that passes through a mounting plate, a rotary joint, and a baffle plate. The end of the air blowing guide rod is an air blowing end that directs an upwardly sloping airflow. An air guiding component is connected to the hollow structure at the upper end of the air blowing guide rod.

[0008] As a preferred technical solution of this application, the end of the blowing head is a blowing head that is larger in the middle and smaller at both ends, and the blowing head has an upwardly inclined blowing hole at the upper middle position.

[0009] As a preferred technical solution of this application, a bearing seat is provided on the lower surface of the sealing plate, and the bearing seat fixes the sealing plate to the rotary joint by fasteners.

[0010] As a preferred technical solution of this application, the output end of the DC motor is provided with a drive gear, which meshes with a rotary joint.

[0011] As a preferred technical solution of this application, a motor cover baffle is provided on the outer side of the mounting plate.

[0012] As a preferred technical solution of this application, the mounting plate is connected to a cantilever via an intermediate guide shaft.

[0013] Compared with the prior art, the beneficial effects of this application are as follows: This application adopts a rotary blowing design, which drives the entire blowing assembly to rotate through a DC motor. Combined with the blowing hole design at a 15° angle on the blowing end, the airflow is directed upwards into the packaging bag, avoiding direct blowing on the material in the bag. This effectively reduces the impact on the material in the bag and completely solves the problem of the single airflow direction and uneven distribution of traditional fixed blowing devices. It ensures that all corners of the packaging bag can be fully and evenly inflated, effectively avoiding local over-inflation or under-inflation, and significantly improving the packaging quality and appearance consistency.

[0014] The blowing tip features a unique spindle-shaped structure. Its streamlined appearance, with a larger middle and smaller ends, effectively reduces the impact of airflow on food, making it particularly suitable for lightweight puffed foods such as potato chips and popcorn. The upward-sloping blowing hole design makes the airflow direction gentler, avoiding the breakage and scattering of food caused by traditional direct airflow, effectively protecting the integrity and quality of the food.

[0015] The sealing disc features a frustum-shaped structure, positioned at the top of the food bag to form an effective physical barrier. This effectively prevents external debris from entering the packaging, ensuring food hygiene and safety. Simultaneously, this structure prevents oil from spilling due to airflow, making it particularly suitable for packaging oily foods such as spicy snacks. This avoids food waste and maintains a clean production environment. Attached Figure Description

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

[0017] Figure 2 This is the main view of this application;

[0018] Figure 3This is the left view of this application;

[0019] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0020] In the diagram: 1. Mounting plate, 2. Air guide, 3. Sealing plate, 4. Air blowing end, 5. Air blowing guide rod, 6. Drive gear, 7. Intermediate guide shaft, 8. Rotary joint, 9. Cantilever, 10. Bearing seat, 11. Motor cover baffle, 12. DC motor. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application (for ease of description and understanding, hereinafter referred to as...), Figure 2 (The above is described above). All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0022] Please see Figure 1-4 This application provides a technical solution: an air blowing device for food packaging bags, which is mainly used in packaging production lines for spicy strips, inflatable packaged foods, etc., that require the filling of protective gas.

[0023] The air blowing device includes a mounting plate 1 as the main support structure. The mounting plate 1 is made of aluminum alloy plate with a thickness of 8mm, which has good strength and corrosion resistance. A DC motor 12 with a power of 200W is installed at the right end of the mounting plate 1. The DC motor 12 is a 24V DC servo motor with an adjustable speed range of 0-3000rpm, which can meet the production needs of different packaging speeds.

[0024] The output shaft of the DC motor 12 is connected to the drive gear 6 via a coupling. The drive gear 6 meshes with the gear teeth of the rotary joint 8. The driven gear has 60 teeth, forming a 1:3 reduction ratio, which keeps the speed of the rotary joint 8 within the range of 0-1000 rpm, ensuring the smoothness of the blowing action.

[0025] The rotary joint 8 ensures long-term operational reliability. A baffle plate 3 is installed in close contact with the lower surface of the rotary joint 8. The baffle plate 3 has a truncated cone-like structure and is located at the top of the food bag to prevent other foreign objects from entering the food bag and to prevent oil in the bag from spilling due to air blowing. It is also made of stainless steel and the surface is polished to meet food-grade hygiene requirements.

[0026] An air blowing assembly is installed at the center of the baffle plate 3, which is the core component of the entire device. The air blowing assembly mainly consists of an air blowing guide rod 5 and an air blowing end 4.

[0027] The air blowing guide rod 5 has a hollow structure and passes through the mounting plate 1, rotary joint 8, and baffle plate 3 from top to bottom. It is sealed with each component to ensure no air leakage. The upper end of the air blowing guide rod 5 is connected to the air guide component 2 via a quick connector, which is connected to the compressed air source.

[0028] The air blowing end 4 is installed at the lower end of the air blowing guide rod 5. Specifically, the air blowing end 4 has a spindle-shaped appearance with a "larger middle and smaller ends" shape, with a maximum diameter of 15mm and a diameter that narrows to 8mm at both ends. At the upper middle position, about 10mm from the top of the end, there are evenly distributed air blowing holes. The air blowing holes are tilted upward at a 15° angle to ensure that the airflow can fully fill all corners of the packaging bag.

[0029] When compressed air enters the blowing end 4 from the hollow blowing guide rod 5, a relatively large buffer space is formed at the maximum diameter of the spindle shape. Within this space, the airflow velocity decreases and pressure is dispersed before it is ejected outwards through the inclined blowing holes. This gradual airflow channel avoids abrupt contraction and expansion of the airflow, resulting in a smoother flow.

[0030] To ensure stable operation of the rotating components, a bearing housing 10 is provided on the lower surface of the retaining plate 3. The bearing housing 10 is made of cast iron and contains a deep groove ball bearing capable of withstanding combined radial and axial loads. The bearing housing 10 securely connects the retaining plate 3 to the rotary joint 8 using hex socket head cap screws.

[0031] For operational safety and equipment protection, a motor cover baffle 11 is provided on the outer side of the mounting plate 1. This baffle is made of 0.8mm thick stainless steel sheet, stamped and formed, with heat dissipation holes on its surface. This protects the motor from external contamination while ensuring good heat dissipation. The motor cover baffle 11 is connected by fasteners for easy and quick disassembly and assembly during maintenance.

[0032] Cantilever 9 is the structure that connects this device to the external structure.

[0033] When the food packaging bag needs to be inflated, the DC motor 12 starts and drives the drive gear 6 to rotate. Through gear transmission, the rotary joint 8 and the entire air blowing assembly begin to rotate. At the same time, compressed air enters the hollow structure of the air blowing guide rod 5 through the air guide 2 and is ejected through the inclined air blowing hole of the air blowing end 4. Due to the rotational movement of the air blowing end 4 and the design of the inclined air blowing hole, the airflow can be spirally filled into the packaging bag, ensuring uniform and full inflation.

[0034] The air-blowing device in this embodiment has advantages such as compact structure, simple operation, and good inflation effect. The rotary air-blowing design ensures uniform inflation of the packaging bag, avoiding problems such as localized over-inflation or under-inflation. The equipment operates stably and reliably, is easy to maintain, and is suitable for inflation operations of food packaging bags of various sizes, significantly improving packaging production efficiency and product quality.

[0035] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air blowing device for a food packaging bag, comprising a mounting plate (1), characterized in that: A DC motor (12) is provided at the end of the mounting plate (1), and a rotary joint (8) is engaged at the output end of the DC motor (12). A baffle plate (3) is provided close to the lower surface of the rotary joint (8), and an air blowing component is provided in the middle of the baffle plate (3). The blowing assembly consists of a blowing guide rod (5) and a blowing end (4). The blowing guide rod (5) is a hollow structure that passes through the mounting plate (1), the rotary joint (8), and the baffle plate (3). The end of the blowing guide rod (5) is a blowing end (4) that directs the upward airflow. The hollow structure at the upper end of the blowing guide rod (5) is connected to a guide component (2).

2. The air blowing device for a food packaging bag according to claim 1, characterized in that: The end of the blowing head (4) is a blowing head that is large in the middle and small at both ends, and the blowing head has an upward-sloping blowing hole at the upper middle position.

3. The air blowing device for a food packaging bag according to claim 1, characterized in that: The lower surface of the sealing plate (3) is provided with a bearing seat (10), and the bearing seat (10) fixes the sealing plate (3) to the rotary joint (8) by fasteners.

4. The air blowing device for a food packaging bag according to claim 1, characterized in that: The output end of the DC motor (12) is provided with a drive gear (6), which meshes with the rotary joint (8).

5. The air blowing device for a food packaging bag according to claim 1, characterized in that: A motor cover baffle (11) is provided on the outside of the mounting plate (1).

6. The air blowing device for a food packaging bag according to claim 1, characterized in that: The mounting plate (1) is connected to a cantilever (9) via an intermediate guide shaft (7).

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