A meltblowing machine

Abstract

The utility model relates to filter core processing equipment technical field especially relates to a kind of melt spraying machine, including the air heating tank for heating air and the gas pump for providing gas to air heating tank, the air inlet end of air heating tank is communicated with gas pump through cold gas delivery pipe, the air outlet end of air heating tank is equipped with a pair of hot gas delivery pipe respectively with different spray head intercommunication setting, the end of hot gas delivery pipe is equipped with the first hot gas branch pipe with several upper air holes intercommunication setting and the second hot gas branch pipe with several lower air holes intercommunication setting.Spray hole in the process of spraying melt, the upper and lower sides of spray hole blow hot air, hot air can avoid melt to cool and solidify immediately after spraying, to facilitate the material forming of subsequent filter core, improve the processing efficiency of filter core.

Description

Technical Field

[0001] This utility model relates to the technical field of filter element processing equipment, and in particular to a meltblown machine. Background Technology

[0002] In the field of filter cartridge manufacturing, meltblown machines are key equipment for producing meltblown filter cartridges by melting and spraying PP granular material (polypropylene raw material granules). Their technological level and performance directly affect the quality and production efficiency of the filter cartridges. Meltblown filter cartridges, due to their unique fiber structure and filtration performance, are widely used in liquid and gas filtration systems, such as in the medical industry for purifying air and filtering tiny particles from pharmaceutical solutions, and in the electronics industry for ensuring the cleanliness of the production environment. However, existing meltblown machines have many problems in actual production, especially in the cooling and solidification of the melt after spraying, which seriously restricts the improvement of product quality and production efficiency.

[0003] Currently, most existing meltblown machines have certain limitations in their structural and functional design. In the melt spraying stage, some machines are only equipped with simple nozzle structures, lacking effective auxiliary measures to control the ambient temperature after the melt is sprayed. When the high-temperature melt is sprayed from the nozzle, it quickly comes into contact with the surrounding cold air. Due to the large temperature difference, the melt easily cools and solidifies. This not only hinders the fiber formation process, affecting the uniformity and fineness of the filter element's fiber structure, thus reducing the filter element's processing and forming effect, but also easily clogs the nozzle, increasing equipment maintenance costs. Frequent downtime for maintenance severely impacts production continuity. Therefore, this paper proposes a meltblown machine to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a meltblown machine that addresses the shortcomings of existing technologies, thereby solving the technical problem that the melt easily cools and solidifies when it encounters cold air after being sprayed out.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A meltblown machine includes a support frame and a meltblown section mounted on the support frame for spraying out melted PP granules. The meltblown section has a pair of parts. The meltblown section includes a screw extruder. The discharge end of the screw extruder is equipped with a nozzle for spraying melt, and the feed end of the screw extruder is equipped with a hopper for storing PP granules. Each nozzle is provided with a spray hole and upper air holes and lower air holes respectively located above and below the spray hole. The spray holes, upper air holes and lower air holes are provided in a plurality of parts and arranged in a transverse equidistant array.

[0007] It also includes an air heating box for heating air and an air pump for supplying gas to the air heating box. The air inlet of the air heating box is connected to the air pump through a cold air delivery pipe. The air outlet of the air heating box is provided with a pair of hot air delivery pipes that are respectively connected to different nozzles. The end of the hot air delivery pipe is provided with a first hot air branch pipe that is connected to several upper air holes and a second hot air branch pipe that is connected to several lower air holes.

[0008] Furthermore, a control box for controlling the operation of the meltblown section is installed on the side of the support frame.

[0009] Furthermore, the hopper is equipped with an air guide pipe that is connected to its bottom side, and a blower is installed at the top of the air guide pipe.

[0010] Furthermore, the meltblown section also includes a drive motor and a reducer that is driven and connected to the screw end of the screw extruder. The drive motor and the reducer are driven and connected through a transmission component.

[0011] Furthermore, the air heating box includes an insulated box and a heating inner box disposed within the insulated box. A partition is provided in the middle of the heating inner box to divide the interior of the heating inner box into a first heating chamber and a second heating chamber. The first heating chamber is provided with several vertically arranged first air guide plates to form a wave-shaped first airflow channel within the first heating chamber. The second heating chamber is provided with several vertically arranged second air guide plates to form a wave-shaped second airflow channel within the second heating chamber. The cold air delivery pipe is provided with a first cold air branch pipe connected to the initial end of the first airflow channel and a second cold air branch pipe connected to the initial end of the second airflow channel. The ends of the first airflow channel and the ends of the second airflow channel are respectively connected to different hot air delivery pipes. Heating devices for heating air are provided between two adjacent first air guide plates and between two adjacent second air guide plates.

[0012] Furthermore, the heating device is a heating element.

[0013] The beneficial effects of this utility model are as follows: During use, PP granules are poured into a hopper for storage, facilitating the continuous feeding of PP granules (polypropylene raw material granules) into the screw extruder. The screw extruder is controlled to operate, and under the shear force of the screw extruder, the PP granules (polypropylene raw material granules) heat up and melt, forming a polymer melt. The melt is extruded within the screw extruder and finally ejected from the nozzle. During the ejection process, an air pump and an air heating chamber operate simultaneously. The air pump delivers air to the air heating chamber through a cold air delivery pipe for heating. The heated air is then delivered out of the air heating chamber through a hot air delivery pipe, and then through a first hot air distribution pipe to the nozzle, where it is ejected from the upper air hole. It is also delivered through a second hot air distribution pipe to the nozzle, where it is ejected from the lower air hole. During the ejection of the melt, hot air is blown from the upper and lower sides of the nozzle. This hot air prevents the melt from cooling and solidifying immediately after ejection, facilitating the subsequent collection and forming of the filter element and improving the processing efficiency of the filter element. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the nozzle of this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of the air heating box of this utility model.

[0018] The reference numerals in the figures include:

[0019] 1. Support frame; 2. Screw extruder; 3. Control box; 4. Nozzle; 41. Spray hole; 42. Upper air hole; 43. Lower air hole; 5. Hopper; 6. Air guide pipe; 7. Fan; 8. Reducer; 9. Drive motor; 10. Transmission components; 11. Air heating box; 111. Insulation box; 112. Partition; 113. First heating chamber; 114. Second heating chamber; 115. First air guide plate; 116. Second air guide plate; 117. Heating element; 118. Heating inner box; 12. Air pump; 13. Cold air delivery pipe; 131. First cold air branch pipe; 132. Second cold air branch pipe; 14. Hot air delivery pipe; 141. First hot air branch pipe; 142. Second hot air branch pipe. Detailed Implementation

[0020] The following is a detailed description of a meltblown machine according to the present invention, with reference to the accompanying drawings.

[0021] like Figure 1-3As shown, an embodiment of the meltblown machine of this utility model includes a support frame 1 and a meltblown section mounted on the support frame 1 for melting and spraying PP granular material (polypropylene raw material granules). The meltblown section is provided in pairs or multiple. A control box 3 for controlling the operation of the meltblown section is installed on the side of the support frame 1. By operating the control box 3, each meltblown section can be controlled individually, so that a single meltblown section can be controlled to operate, or multiple meltblown sections can be controlled to operate simultaneously. The meltblown section includes a screw extruder 2, which is existing technology. A nozzle 4 for spraying melt is installed at the discharge end of the screw extruder 2, and a hopper 5 for storing PP granules (polypropylene raw material granules) is installed at the feed end of the screw extruder 2. In use, PP granules are poured into the hopper 5 for storage, facilitating the continuous feeding of PP granules (polypropylene raw material granules) into the screw extruder 2. The control box 3 controls the operation of the screw extruder 2. Under the shear force of the screw extruder 2, the PP granules (polypropylene raw material granules) heat up and melt, forming a polymer melt. The melt is extruded within the screw extruder 2 and finally sprayed from the nozzle 4, spraying the melt onto a material collection and forming device (not shown in the figure) used to form the filter element, thus achieving the processing of the filter element.

[0022] Additionally, an air guide pipe 6 is provided on the hopper 5, communicating with its bottom side. A blower 7 is installed at the top of the air guide pipe 6. Running the blower 7 blows air into the bottom of the hopper 5 through the air guide pipe 6, preventing blockage during the continuous feeding of PP granules (polypropylene raw material granules) into the screw extruder 2. To drive the screw extruder 2, the meltblown section also includes a drive motor 9 and a reducer 8 that is driven by the screw end of the screw extruder 2. The drive motor 9 and the reducer 8 are connected by a transmission component 10. The transmission component 10 can be a transmission structure combining a drive wheel and a drive belt. Running the drive motor 9, under the transmission action of the transmission component 10 and the reducer 8, drives the screw inside the screw extruder 2 to rotate. Furthermore, the reducer 8 reduces the screw speed, allowing the screw inside the screw extruder 2 to rotate at a specified speed, causing the PP granules (polypropylene raw material granules) to heat up and melt, forming a polymer melt.

[0023] In this embodiment, a pair of screw extruders 2 are provided, and each screw extruder 2 is provided with a nozzle 4 at its discharge end. The nozzle 4 is provided with a spray hole 41 and upper air holes 42 and lower air holes 43 respectively located above and below the spray hole 41. The spray hole 41, upper air holes 42 and lower air holes 43 are provided in a plurality and arranged in a transverse equidistant array. Furthermore, this meltblown machine also includes an air heating box 11 for heating air and an air pump 12 for supplying gas to the air heating box 11. The air inlet end of the air heating box 11 is connected to the air pump 12 through a cold air delivery pipe 13. The air outlet end of the air heating box 11 is provided with a pair of hot air delivery pipes 14 respectively connected to different nozzles 4. Specifically, the end of the hot air delivery pipe 14 is provided with a first hot air branch pipe 141 connected to a plurality of upper air holes 42 and a second hot air branch pipe 142 connected to a plurality of lower air holes 43. During the operation of the screw extruder 2, the PP granules (polypropylene raw material granules) are heated and melted into a melt, which is then ejected from the nozzle 41 on the nozzle 4. At the same time, the air pump 12 and the air heating box 11 are operated. The air pump 12 delivers air to the air heating box 11 through the cold air delivery pipe 13 to heat the air. The heated air is then delivered out of the air heating box 11 through the hot air delivery pipe 14, and then delivered to the nozzle 4 through the first hot air distribution pipe 141 and ejected by the upper air hole 42. It is also delivered to the nozzle 4 through the second hot air distribution pipe 142 and ejected by the lower air hole 43. During the ejection of the melt, hot air is blown out from the upper and lower sides of the nozzle 41. The hot air can prevent the melt from cooling and solidifying immediately after ejection, which is conducive to the subsequent collection and forming of the filter element. It can also stretch the melt ejected from the nozzle 41 into fiber filaments.

[0024] like Figure 4As shown, the air heating box 11 includes an insulation box 111 and a heating inner box 118 disposed inside the insulation box 111. A partition 112 is provided in the middle of the heating inner box 118 to divide the interior of the heating inner box 118 into a first heating chamber 113 and a second heating chamber 114. In the first heating chamber 113, several vertically arranged first air guide plates 115 are provided to form a wave-shaped first airflow channel in the first heating chamber 113. In the second heating chamber 114, several vertically arranged second air guide plates 116 are provided to form a wave-shaped second airflow channel in the second heating chamber 114. The cold air delivery pipe 13 is provided with a first cold air branch pipe 131 connected to the initial end of the first airflow channel and a second cold air branch pipe 132 connected to the initial end of the second airflow channel. The ends of the first airflow channel and the ends of the second airflow channel are respectively connected to different hot air delivery pipes 14. The air pump 12 is operated to transport air through the cold air delivery pipe 13, and then through the first cold air branch pipe 131 and the second cold air branch pipe 132 to deliver the air to be heated to the first airflow channel and the first airflow channel respectively, so that the air to be heated flows in a wave-like manner, and finally is discharged from different hot air delivery pipes 14 respectively.

[0025] Furthermore, heating elements 117 are provided between two adjacent first air guide plates 115 and between two adjacent second air guide plates 116. When air flows within the first airflow channel, the heating elements 117 on both sides operate simultaneously to heat the flowing air, causing hot air to be ejected from both the upper air hole 42 and the lower air hole 43. In addition, allowing the air to be heated to flow within the wavy first airflow channel is to ensure that the air is fully heated within a certain space, thereby improving heating efficiency.

[0026] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0027] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A meltblown machine, characterized in that: It includes a support frame (1) and a meltblown section mounted on the support frame (1) for spraying out PP granules after melting. The meltblown section is provided with a pair. The meltblown section includes a screw extruder (2). The discharge end of the screw extruder (2) is equipped with a nozzle (4) for spraying out the melt. The feed end of the screw extruder (2) is equipped with a hopper (5) for storing PP granules. Each nozzle (4) is provided with a spray hole (41) and an upper air hole (42) and a lower air hole (43) respectively located above and below the spray hole (41). The spray hole (41), the upper air hole (42) and the lower air hole (43) are provided in several and arranged in a transverse equidistant array. It also includes an air heating box (11) for heating air and an air pump (12) for supplying gas to the air heating box (11). The air inlet of the air heating box (11) is connected to the air pump (12) through a cold air delivery pipe (13). The air outlet of the air heating box (11) is provided with a pair of hot air delivery pipes (14) that are respectively connected to different nozzles (4). The end of the hot air delivery pipe (14) is provided with a first hot air branch pipe (141) that is connected to several upper air holes (42) and a second hot air branch pipe (142) that is connected to several lower air holes (43).

2. The meltblown machine according to claim 1, characterized in that: A control box (3) for controlling the operation of the meltblown section is installed on the side of the support frame (1).

3. A meltblown machine according to claim 1, characterized in that: The hopper (5) is provided with an air guide pipe (6) that is connected to its bottom side, and a blower (7) is installed at the top of the air guide pipe (6).

4. A meltblown machine according to claim 1, characterized in that: The meltblown section also includes a drive motor (9) and a reducer (8) that is connected to the screw end of the screw extruder (2). The drive motor (9) and the reducer (8) are connected by a transmission component (10).

5. A meltblown machine according to claim 1, characterized in that: The air heating box (11) includes an insulation box (111) and a heating inner box (118) disposed inside the insulation box (111). A partition (112) is provided in the middle of the heating inner box (118) to divide the interior of the heating inner box (118) into a first heating chamber (113) and a second heating chamber (114). The first heating chamber (113) is provided with a plurality of vertically arranged first air guide plates (115) to form a wave-shaped first airflow channel in the first heating chamber (113). The second heating chamber (114) is provided with a plurality of vertically arranged second air guide plates (115). Air plate (116) is provided to form a wave-shaped second airflow channel in the second heating chamber (114); a first cold air branch pipe (131) is provided on the cold air delivery pipe (13) to be connected to the beginning end of the first airflow channel, and a second cold air branch pipe (132) is provided to be connected to the beginning end of the second airflow channel; the end of the first airflow channel and the end of the second airflow channel are respectively connected to different hot air delivery pipes (14); heating devices for heating air are provided between two adjacent first air guide plates (115) and between two adjacent second air guide plates (116).

6. A meltblown machine according to claim 5, characterized in that: The heating device is a heating element (117).

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