Preparation device of high-uniformity fiber-based automobile bottom system product

Abstract

The utility model relates to the technical field of fiber-based automobile product preparation, in particular to a high-uniformity fiber-based automobile bottom system product preparation device which comprises a spinning net forming device, a hot air drying oven, a net laying device, a needling machine and a hot pressing device. According to the utility model, bi-component filaments with various contents can be prepared through the spinning web forming device, a skin layer can be melted into a binding material at a certain temperature, the bi-component filaments are processed by the negative pressure web forming device to form a single-layer thin fiber web, the fiber web is subjected to hot air bonding by the hot air oven, and then the fiber web is laminated and lapped by the lapping device. The thick fiber web after layering continues to be conveyed to a needling machine for needling, finally the fiber web is placed in a mold of a hot pressing device for hot pressing, the high-uniformity fiber-based plate is prepared, the surface density of the plate can be cooperatively regulated and controlled by all links to adapt to an automobile bottom system, the device is simple in combination, starting and stopping of the device can be independently controlled, and the production efficiency is improved. Meanwhile, the method is applicable to preparation of other products.

Description

Technical Field

[0001] The utility model relates to the technical field of the preparation of fiber-based automotive products, in particular to a preparation device for a high-uniformity fiber-based automotive bottom system product. Background Technique

[0002] Automotive bottom system products generally include underbody panels, outer sound insulation pads for wheel housings, battery heat insulation plates, etc. The main research and development directions include lightweight, acoustics, improvement of mechanical properties, and environmental protection and renewable. Glass fiber is commonly used as the raw material for automotive bottom system products. However, glass fiber has disadvantages such as being easily brittle and having poor wear resistance, and there are also health risks such as contact or inhalation causing dermatitis, pneumoconiosis, etc. In addition, glass fiber-based products also contain inorganic and organic materials, resulting in difficult separation and low feasibility of recycling and reuse. In view of this, it is urgent to develop a preparation device for an environmentally friendly, safe and excellent-performance automotive bottom system product;

[0003] At present, relevant preparation devices have been developed in existing patents. For example, the utility model patent with the publication number of CN206733646U discloses "a forming device for an automotive underbody panel", which is used to produce automotive underbody panel products through the cooperation of a needle punching machine, a hot air oven, a three-roll hot ironing machine and a rolling and shaping device. This device improves the mixing uniformity of polyester materials and PP films during the product forming process. However, this device first needles the fiber web and then hot air consolidates the fiber web. Since the needle punching process cannot reinforce thin fiber webs, a relatively thick single-layer fiber web needs to be used, which in turn limits the number of layers of fiber web laying and makes it difficult to prepare highly uniform plates. Content of the Utility Model

[0004] The purpose of the utility model is to provide a preparation device for a high-uniformity fiber-based automotive bottom system product to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A preparation device for a high-uniformity fiber-based automotive bottom system product includes a spinning and web-forming device, a hot air oven, a web laying device, a needle punching machine and a hot pressing device. The spinning and web-forming device includes two symmetrically distributed double hoppers. A twin-screw extruder is fixedly connected and communicated below the double hoppers. A composite spinneret plate is arranged below the two twin-screw extruders. An air draft device is arranged below the composite spinneret plate. A negative pressure web-forming device is arranged at the bottom of the air draft device. The installation order of various machines on the preparation device connected to each other from left to right is: spinning and web-forming device, hot air oven, web laying device, needle punching machine and hot pressing device.

[0007] Furthermore, the spunbonding device is used to prepare a bicomponent filament thin fiber web. One end of the spunbonding device is provided with a hot air oven. One end of the hot air oven facing away from the spunbonding device is provided with a cross-laying device. One end of the cross-laying device facing away from the hot air oven is provided with a needling machine. One end of the needling machine facing away from the cross-laying device is provided with a hot pressing device.

[0008] Furthermore, the hot air oven can hot air consolidate the single-layer thin fiber web after the web-forming process, and endow the single-layer thin fiber web with initial strength.

[0009] Furthermore, the cross-laying device is used to receive the fiber web hot air consolidated by the hot air oven and perform layer-by-layer cross-laying on the fiber web.

[0010] Furthermore, the needling machine can reinforce and composite the thick fiber web after cross-laying, so that the fibers in adjacent layers of the fiber web penetrate and entangle with each other to form a single-layer thick fiber web.

[0011] Furthermore, the hot pressing device includes a hot pressing die. The hot pressing die is used to hot press and shape the relatively fluffy non-woven material after needling. The skin material in the bicomponent fiber melts at high temperature and bonds with each other under the pressure of the hot pressing die. The shape of the hot pressing die is not limited to the rectangle in the schematic diagram and can be replaced according to the product requirements of the preparation.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. Through the spunbonding device, bicomponent filaments with various contents can be prepared. The skin layer can be melted into a bonding material at a certain temperature. After the bicomponent filaments are processed by the negative pressure web-forming device, a single-layer thin fiber web is formed. After the hot air oven hot air bonds the fiber web, it is cross-laid by the cross-laying device. The thick fiber web after laying is continuously conveyed to the needling machine for needling. Finally, the fiber web is put into the die of the hot pressing device for hot pressing to obtain a high-uniformity fiber-based board. The areal density of the board can be coordinated and controlled by each link to adapt to the automotive bottom system. The combination of this device is simple, and the start and stop of the device can be controlled separately. At the same time, it can be applied to the preparation of other products.

[0014] 2. Using this device, multi-layer laying of the thin fiber web can be realized to ensure the uniformity of the automotive bottom system products. For example, high-polymer fiber base protectors, battery heat insulation boards, wheel sound insulation pads, floor mats, etc. This device can prepare automotive bottom products with the advantages of light weight, recyclability, high uniformity, excellent mechanical properties, etc. At the same time, this device can prepare single-layer spunbonded materials with low areal density. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] In the figure: 1. Double hopper; 2. Twin-screw extruder; 3. Composite spinneret; 4. Air draft device; 5. Negative pressure web-forming device; 6. Hot air oven; 7. Web laying device; 8. Needle punching machine; 9. Hot pressing device. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figure 1 , in the embodiment of the present invention, a preparation device for a high-uniformity fiber-based automotive bottom system product includes a spinning and web-forming device, a hot air oven 6, a web laying device 7, a needle punching machine 8, and a hot pressing device 9. The spinning and web-forming device includes two symmetrically distributed double hoppers 1. A twin-screw extruder 2 is fixedly connected and communicated below the double hoppers 1. A composite spinneret 3 is arranged below the two twin-screw extruders 2. An air draft device 4 is arranged below the composite spinneret 3. A negative pressure web-forming device 5 is arranged at the bottom of the air draft device 4. The installation order of various machines on the preparation device connected relatively from left to right is: spinning and web-forming device, hot air oven 6, web laying device 7, needle punching machine 8, and hot pressing device 9.

[0019] Specifically, bicomponent filaments are prepared by the spinning and web-forming device. The bicomponent filaments are then processed by the negative pressure web-forming device 5 to form a single-layer thin fiber web. Then, the hot air oven 6 hot air bonds the fiber web. Next, the web laying device 7 laminates and lays the hot air-bonded fiber web. The thick fiber web after laying is continuously conveyed to the needle punching machine 8 for needle punching. Finally, the fiber web is put into the mold of the hot pressing device 9 for hot pressing to obtain a high-uniformity fiber-based board. The combination of this device is simple, and the start and stop of the device can be controlled separately. At the same time, it can be applied to the preparation of other products.

[0020] As Figure 1 shown, in this embodiment:

[0021] The spinning and web-forming device is used to prepare a bicomponent filament thin fiber web. A hot air oven 6 is arranged at one end of the spinning and web-forming device. A web laying device 7 is arranged at the end of the hot air oven 6 facing away from the spinning and web-forming device. A needle punching machine 8 is arranged at the end of the web laying device 7 facing away from the hot air oven 6. A hot pressing device 9 is arranged at the end of the needle punching machine 8 facing away from the web laying device 7.

[0022] The hot air oven 6 can hot air consolidate the single-layer thin fiber web after the web-forming process and endow the single-layer thin fiber web with initial strength.

[0023] The web laying device 7 is used to receive the fiber web consolidated by hot air in the hot air oven 6 and perform layered web laying on the fiber web.

[0024] The needling machine 8 can reinforce and composite the thick fiber web after web laying, enabling the fibers in adjacent layers of the fiber web to interpenetrate and entangle with each other to form a single-layer thick fiber web. Only a single needle bed is drawn in the present utility model, and this device can be configured with a double needle bed, and the use of the needle bed can be adjusted according to the surface density requirements.

[0025] The hot pressing device 9 includes a hot pressing die. The hot pressing die is used to hot press and shape the relatively fluffy non-woven material after needling. The skin material in the bicomponent fiber melts at high temperature and bonds with each other under the pressure of the hot pressing die. The shape of the hot pressing die is not limited to the rectangle in the schematic diagram and can be replaced according to the product requirements of the preparation.

[0026] In specific implementation, high polymer chips with different melting points are respectively put into the double hoppers 1 of the skin layer or the core layer, heated and melted, extruded from the spinneret holes of the composite spinneret plate 3, cooled by cold air in the air draft stretching device 4, and stretched into slender fibers by air flow, that is, bicomponent filaments. The negative pressure web forming device 5 lays the filaments into a single-layer thin fiber web. The hot air oven 6 hot air bonds the single-layer thin fiber web and then transports it to the web laying device 7 for multi-layer laying of the single-layer reinforced fiber web, and continues to transport it to the needling machine 8 for needling and composite, and finally uses the die of the hot pressing device 9 to hot press to obtain a high-uniformity fiber-based board, which is applicable to the automotive bottom system.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed claims.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A preparation device for a high-uniformity fiber-based automotive bottom system product, characterized in that include: A spinning web forming device, a hot air oven (6), a web laying device (7), a needle punching machine (8) and a hot pressing device (9), wherein the spinning web forming device comprises two symmetrically distributed double hoppers (1), a twin screw extruder (2) is connected and fixed below the double hoppers (1), a composite spinneret (3) is arranged below the two twin screw extruders (2), an air flow drafting device (4) is arranged below the composite spinneret (3), a negative pressure web forming device (5) is arranged at the bottom of the air flow drafting device (4), and the relative connection and installation order of various machines on the preparation device from left to right is: spinning web forming device, hot air oven (6), web laying device (7), needle punching machine (8) and hot pressing device (9).

2. The preparation device of the high-uniformity fiber-based automotive bottom system product according to claim 1, characterized in that, The spinning web forming device is used to prepare a bicomponent filament thin fiber web, a hot air oven (6) is arranged at one end of the spinning web forming device, a web laying device (7) is arranged at the end of the hot air oven (6) facing away from the spinning web forming device, a needle punching machine (8) is arranged at the end of the web laying device (7) facing away from the hot air oven (6), and a hot pressing device (9) is arranged at the end of the needle punching machine (8) facing away from the web laying device (7).

3. The preparation device of the high-uniformity fiber-based automotive bottom system product according to claim 1, characterized in that, The hot air oven (6) can hot-air consolidate the single-layer thin fiber web that has gone through the web-forming process, thereby giving the single-layer thin fiber web initial strength.

4. The preparation device of the high-uniformity fiber-based automotive bottom system product according to claim 1, characterized in that, The web laying device (7) is used to receive the fiber web that has been hot-air consolidated by the hot-air oven (6) and to lay the fiber web in layers.

5. The preparation device of the high-uniformity fiber-based automotive bottom system product according to claim 1, characterized in that, The needle punching machine (8) can reinforce and compound the thick fiber web after laying, so that the fibers in adjacent layers of fiber webs are interlaced and entangled with each other to form a single-layer thick fiber web.

6. The preparation device of the high-uniformity fiber-based automotive bottom system product according to claim 1, characterized in that, The hot pressing device (9) comprises a hot pressing mold, which is used to hot press and shape the relatively fluffy non-woven material after needle punching. The skin material in the two-component fiber is melted at high temperature and bonded to each other under the pressure of the hot pressing mold. The shape of the hot pressing mold is not limited to a rectangle and can be replaced according to the requirements of the prepared product.

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