A hot air box for hot air non-woven fabric fluffing recovery of sanitary napkin production line

Abstract

The utility model discloses a hot -blast box for sanitary towel production line hot -blast non -woven fabric puffy recovery, including the box, the passage that the hot -blast non -woven cloth passes through is formed in the box, the both sides side wall of box all is provided with a plurality of ventilation hole, the position of the outside of box corresponds to the installation of hot -blast subassembly of ventilation hole, and the shell that opens to ventilation hole one side is included to hot -blast subassembly, and the side away from ventilation hole of shell is provided with the air intake, and the inside installation of shell has heating element, and the outside installation of shell has the fan, and the whole structure is simple, can be installed on the existing sanitary towel production line through the conventional fastener, need not to carry out large -scale reconstruction to the main body structure of production line, when hot -blast non -woven cloth passes through hot -blast box, hot air evenly penetrates to the fibre clearance of hot -blast non -woven cloth, and high -efficiently promotes the fibre reset under pressure deformation, realizes the quick recovery of puffy degree, and finally guarantees the core quality on softness, air permeability and absorption performance of the sanitary towel product of subsequent production.

Description

Technical Field

[0001] This utility model relates to a sanitary napkin production line, and in particular to a hot air box. Background Technology

[0002] In the production of sanitary napkins, hot-air nonwoven fabric is often used as one of the core raw materials. Its fluffiness directly affects the softness, breathability and absorbency of the product. However, from manufacturing to entering the sanitary napkin production line, this nonwoven fabric needs to go through multiple processing steps, and each step will cause damage to its fluffiness.

[0003] First, after the nonwoven fabric factory completes the hot-air nonwoven fabric manufacturing, it will first carry out the winding operation for easy management and scheduling, and then enter the warehousing process. During the storage of the rolled nonwoven fabric, the longer the storage time, the more serious the fiber deformation and the greater the reduction in bulk. Finally, when it is transferred to the sanitary napkin factory, the bumps and stacking during the transfer will bring additional impact and compression, which will eventually cause the nonwoven fabric to be compacted and the bulk to drop significantly. When nonwoven fabrics with impaired fluffiness enter the sanitary napkin production line, the resulting products will suffer from poor softness and low breathability due to raw material issues. This will also affect the absorption core's capacity and conduction efficiency, leading to decreased absorbency and ultimately reducing product quality and market competitiveness. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line includes a box body with a channel for hot air to pass through the nonwoven fabric. Several ventilation holes are provided on both side walls of the box body. A hot air assembly is installed on the outer side of the box body corresponding to the ventilation holes. The hot air assembly includes a housing with an opening facing one of the ventilation holes. An air inlet is provided on the side of the housing away from the ventilation holes. A heating element is installed inside the housing, and a fan is installed on the outer side of the housing.

[0006] The ventilation holes on both sides of the box are staggered.

[0007] The channel is equipped with several temperature sensors that are electrically connected to the heating element, and the monitoring threshold of the temperature sensors is 135℃-150℃.

[0008] Several wind pressure sensors electrically connected to the fan are installed in the channel, and the monitoring threshold of the wind pressure sensors is 30Pa-40Pa.

[0009] The box is equipped with guide rollers at both ends of the channel.

[0010] The housing is provided with several heat dissipation holes.

[0011] The beneficial effects of this utility model are as follows: This utility model forms a channel for the hot air nonwoven fabric to pass through inside the box. Several ventilation holes are provided on both side walls of the box. A hot air assembly is installed on the outer side of the box corresponding to the ventilation holes. The hot air assembly includes a shell that opens towards the ventilation holes, an air inlet on the side of the shell away from the ventilation holes, a heating element installed inside the shell, and a fan installed on the outer side of the shell. The overall structure is simple and can be installed on existing sanitary napkin production lines using conventional fasteners without requiring large-scale modifications to the main structure of the production line. When the hot air nonwoven fabric passes through the hot air box, the hot air evenly penetrates into the fiber gaps of the hot air nonwoven fabric, efficiently pushing the compressed and deformed fibers back to their original position, achieving rapid recovery of fluffiness, and ultimately ensuring the core quality of the sanitary napkin products produced subsequently in terms of softness, breathability, and absorbency. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a partial exploded view of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0015] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0016] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0017] Reference Figure 1-2A hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line includes a box body 1. A channel for hot air to pass through the nonwoven fabric is formed inside the box body 1. Several ventilation holes 2 are provided on both side walls of the box body 1. A hot air assembly 3 is installed on the outer side of the box body 1 corresponding to the ventilation holes 2. The hot air assembly 3 includes a housing 4 opening towards one side of the ventilation holes 2. An air inlet 5 is provided on the side of the housing 4 away from the ventilation holes 2. A heating element 6 is installed inside the housing 4, and a fan 7 is installed on the outer side of the housing 4. The overall structure is simple and can be installed on existing sanitary napkin production lines using conventional fasteners without requiring large-scale modifications to the main structure of the production line. When the nonwoven fabric passes through the hot air box, hot air evenly penetrates into the fiber gaps of the nonwoven fabric, efficiently pushing the compressed and deformed fibers back to their original position, achieving rapid restoration of fluffiness. Ultimately, this ensures the core quality of the subsequently produced sanitary napkin products in terms of softness, breathability, and absorbency.

[0018] Furthermore, the width and length of the channel are designed according to the width of the non-woven fabric commonly used in sanitary napkin production lines (such as 50-200mm) to ensure that the non-woven fabric is completely within the range of hot air. At the same time, a gap of 5-100mm is reserved in the height of the channel to avoid damage caused by friction between the non-woven fabric and the inner wall of the channel.

[0019] The ventilation holes 2 on both sides of the box 1 are staggered to avoid the hot air on both sides from forming an airflow barrier, so that the hot air can penetrate into the fiber gaps from both sides of the nonwoven fabric in stages, improve the fluffy recovery effect of the middle layer fiber, and at the same time prevent the nonwoven fabric from shifting due to airflow disturbance.

[0020] Several temperature sensors electrically connected to the heating element 6 are installed inside the channel. The temperature sensors are evenly distributed at the entrance, middle and exit of the channel, which can monitor the temperature of different areas in real time, avoid local temperature being too high or too low, and ensure that the temperature in the entire channel is stable within the set range. The monitoring threshold of the temperature sensor is 135℃-150℃. This threshold is precisely matched to the fiber characteristics of the hot air nonwoven fabric, which can effectively promote the fiber to reset and restore its fluffiness, and prevent the fiber from melting and deforming due to excessive temperature, thus ensuring the quality of the raw materials.

[0021] Furthermore, heating element 6 is a PTC ceramic heating element with a self-limiting temperature threshold set at 180-200℃, and maintains a safe distance of ≥150mm from the non-woven fabric. Even if the non-woven fabric is deviated during transport, it will not directly contact the heating element, thus avoiding the risk of combustion from the source.

[0022] Several wind pressure sensors electrically connected to the fan 7 are installed in the channel. The wind pressure sensors are installed near the ventilation hole 2 and can directly detect the actual wind pressure after hot air enters the channel, so that the data feedback is more accurate. The monitoring threshold of the wind pressure sensor is 30Pa-40Pa. This wind pressure range can ensure that hot air can fully penetrate the fiber gaps without causing damage to the non-woven fabric web structure due to excessive wind pressure.

[0023] The box 1 is equipped with guide rollers 8 at both ends of the channel to ensure that the nonwoven fabric is transported smoothly along the preset path and to avoid wrinkles or deviations.

[0024] The housing 4 is provided with several heat dissipation holes 9, which can promptly dissipate excess heat generated inside the housing due to the operation of the heating element, prevent the housing temperature from being too high and affecting the normal operation of the fan or other components, and extend the overall service life of the equipment.

[0025] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line, comprising a box body (1), characterized in that... The box (1) forms a channel through which the heating air nonwoven fabric passes. Several ventilation holes (2) are provided on both sides of the box (1). A hot air assembly (3) is installed on the outside of the box (1) corresponding to the ventilation holes (2). The hot air assembly (3) includes a housing (4) that opens towards the ventilation hole (2). An air inlet (5) is provided on the side of the housing (4) away from the ventilation hole (2). A heating element (6) is installed inside the housing (4). A fan (7) is installed on the outside of the housing (4).

2. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 1, characterized in that... The ventilation holes (2) on both sides of the box (1) are staggered.

3. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 1, characterized in that... Several temperature sensors electrically connected to the heating element (6) are installed in the channel.

4. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 3, characterized in that... The temperature sensor has a monitoring threshold of 135℃-150℃.

5. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 1, characterized in that... Several wind pressure sensors electrically connected to the fan (7) are installed in the channel.

6. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 5, characterized in that... The monitoring threshold of the wind pressure sensor is 30Pa-40Pa.

7. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 1, characterized in that... The box (1) is equipped with guide rollers (8) at both ends of the channel.

8. The hot air box for restoring the fluffiness of nonwoven fabric in a sanitary napkin production line according to claim 1, characterized in that... The housing (4) is provided with several heat dissipation holes (9).

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