Preparation device of high-fluffiness non-woven fabric

Abstract

The utility model discloses a high-fluffiness non-woven fabric preparation device, and belongs to the field of non-woven fabric preparation devices. The device comprises a net forming system and an after-finishing system connected with the net forming system, the after-finishing system comprises a hot air pre-consolidation device, the hot air pre-consolidation device comprises a pre-consolidation body and heat preservation cotton, an air supply channel is formed in the pre-consolidation body, and the two ends of the pre-consolidation body are fixedly connected with air inlets communicated with the air supply channel; heating cavities communicating with the air supply channel are formed in the two side walls of the pre-consolidation body, and an electric heating rod is embedded and fixedly connected to the upper end of the pre-consolidation body; the lower end of the pre-consolidation body is fixedly connected with a base, the outer sides of the pre-consolidation body and the base are half coated with the heat preservation cotton, and the lower end of the heat preservation cotton is detachably connected with the base; a drainage groove is formed in the base and communicates with the heating cavity and the lower end of the base. And the lower end of the air inlet is fixedly connected with a fixing frame. The device can be used for preparing the non-woven fabric with high bulkiness.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of non - woven fabric preparation device, more specifically, relate to a kind of preparation device of high loft non - woven fabric. BACKGROUND

[0002] In the field of preparation of high loft non - woven fabric, in order to give non - woven fabric with loft, traditional method often uses hot calender or water jet method to pre-consolidate non - woven fabric, so that the web of non - woven fabric can form a whole. However, these traditional methods have some significant defects. Specifically, the compaction method of hot calender can cause the loftiness of non - woven fabric to decrease significantly, because high temperature and pressure can make the fibers in the web be compacted, thereby reducing the volume and loftiness of non - woven fabric. Similarly, although water jet technology can maintain the loftiness of non - woven fabric to some extent, its consolidation effect is limited, and it may not meet the requirements of non - woven fabric strength and stability in some applications.

[0003] Therefore, the prior art urgently needs a preparation device of high loft non - woven fabric, which can non - contact consolidation of web to maintain the original loftiness and density of non - woven fabric, while improving the consolidation efficiency and uniformity, so as to prepare non - woven fabric with both high loftiness and good physical properties. SUMMARY

[0004] 1. Problem to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a preparation device of high loft non - woven fabric, which can transfer heat from the hot air pre-consolidation device to the web by hot air consolidation non - contact, while reducing the impact on product density, and ensuring the loftiness of non - woven fabric.

[0006] Prepare non - woven fabric with high loft.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solution.

[0009] The application discloses a preparation device of high-bulk non-woven fabric, which comprises a netting system and a post-treatment system connected with the netting system, wherein the post-treatment system comprises a hot air pre-consolidation device, the hot air pre-consolidation device comprises a pre-consolidation body and thermal cotton, an air supply channel is arranged in the pre-consolidation body, air inlets are fixedly connected to both ends of the pre-consolidation body and communicated with the air supply channel, heating cavities are arranged in the side walls of the pre-consolidation body and communicated with the air supply channel, an electric heating rod is inlaid and fixedly connected to the upper end of the pre-consolidation body, a base is fixedly connected to the lower end of the pre-consolidation body, the thermal cotton is semi-covered outside the pre-consolidation body and the base, the lower end of the thermal cotton is detachably connected with the base, a drainage groove is arranged in the base and communicated with the heating cavities and the lower end of the base, and a fixing frame is fixedly connected to the lower end of the air inlet.

[0010] Preferably, the pre-consolidation body comprises a pair of detachably connected pre-consolidation shells, the air supply channel is located at an upper position of a center line of the pre-consolidation body after the pre-consolidation shells are installed, recesses are arranged in the side walls of the pre-consolidation body, and cover plates are detachably connected to the outer ends of the recesses, wherein the heating cavities are surrounded by the recesses and the cover plates.

[0011] Preferably, an installation space for inlaying the electric heating rod is arranged in the pre-consolidation body, and the installation space is communicated with the recesses and the air supply channel.

[0012] Preferably, the base comprises an upper base and a pair of lower bases, the pair of lower bases are fixedly connected to the lower end of the upper base, the lower end of the upper base and the upper end of the lower base form an air guiding gap, a pair of air guiding grooves are arranged in the upper end of the upper base, a plurality of air guiding holes are arranged in the lower end of the air guiding grooves, the air guiding holes are communicated with the air guiding gap and the air guiding grooves, a gap for air flow is formed between the pair of lower bases after installation, the gap is communicated with the air guiding gap, base baffles are fixedly connected to the two ends of the upper base and the lower base, the baffles completely cover the two ends of the upper base and the lower base, and the drainage groove is composed of the air guiding grooves, the air guiding gap, the air guiding holes and the gap.

[0013] Preferably, the lower base is upwardly protruded with a drainage column towards the air guiding gap.

[0014] Preferably, a protrusion matching the gap between the upper base and the lower base is arranged at a lower position of a center line of the upper base, the air guiding gap is divided into two disconnected parts, and a flow channel communicated with the gap is formed between the protrusion and any one of the lower bases.

[0015] Preferably, the air inlet comprises a first air inlet and a second air inlet, the first air inlet and the second air inlet are fixedly connected to the two ends of the pre-consolidation body, respectively, and baffles are detachably connected to the outer ends of the first air inlet and the second air inlet.

[0016] Preferably, the web forming system comprises a material conveying system, a screw extruder, a cooling side blowing system, a web former and a hot calender; the material conveying system, the screw extruder, the cooling side blowing system and the web former are arranged in sequence from top to bottom.

[0017] Preferably, the finishing system further comprises a hot calender, a hot air pre-fixing device and a winding machine; the hot calender, the hot air pre-fixing device, the hot air fixing device and the winding machine are arranged in sequence from the web forming system to a direction away from the web forming system.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] First, the preparation device of the scheme utilizes the hot air pre-fixing device to non-contact fix the web, so that the density of the non-woven fabric prepared remains unchanged, and the non-woven fabric has higher loftiness.

[0021] Second, the hot air pre-fixing device of the scheme is provided with an air inlet with a cover plate at each end of the pre-fixing body, so that hot air needing to be heated can enter the pre-fixing body from any one end of the pre-fixing body and be heated by the electric heating rod embedded in the pre-fixing body; in order to ensure that the temperature of the hot air can meet the requirements, a heating cavity for the hot air to flow in is formed in the pre-fixing body, the heating cavity is in communication with the mounting space of the electric heating rod, so that the hot air can be continuously heated. In addition, a protrusion horizontally placed is arranged in the heating cavity, so that the contact area of the pre-fixing body and the air flow is increased, thereby increasing the heating efficiency of the hot air pre-fixing device on the entering air flow.

[0022] Third, the base of the hot air pre-fixing device is divided into an upper base and a lower base, and a gap for air flow is left at the contact position of the pair of lower bases, so that the hot air can flow out at a high flow rate in the gap after flowing to the lower base, and the temperature loss is reduced.

[0023] Fourth, the lower base protruding to the air guide gap has a flow guide column, and the distance between the flow guide column and the upper base is much smaller than the height of the air guide gap, so that the air flow can produce a throttling phenomenon in the air guide gap, thereby improving the flow rate and uniformity of the hot air, and the hot air pre-fixing device can produce air flow with high uniformity and high flow rate. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the overall preparation device of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic view of the hot air pre-fixing device of the utility model;

[0026] Figure 3It is the partial explosion structure schematic view of the hot air pre-bonding body of the utility model.

[0027] Figure 4 It is the partial structure schematic view of the hot air pre-bonding body of the utility model.

[0028] Figure 5 It is the section view schematic view of the hot air pre-bonding device of the utility model.

[0029] Figure 6 It is the base partial structure schematic view of the hot air pre-bonding device of the utility model.

[0030] Figure 7 It is the base explosion structure schematic view of the hot air pre-bonding device of the utility model.

[0031] Figure 8 It is the hot air flow direction schematic view of the hot air pre-bonding device of the utility model.

[0032] Mark explanation in drawing:

[0033] 1 material conveying system, 2 double screw extruder, 3 cooling side blowing system, 4 web former, 5 hot calender, 6 hot air bonding device, 7 hot air pre-bonding device, 71 air inlet, 711 first air inlet, 712 second air inlet, 713 baffle, 72 pre-bonding body, 721 pre-bonding shell, 7211 air supply channel, 7212 groove, 7213 mounting space, 722 cover plate, 73 electric heating rod, 74 heat insulation cotton, 75 base, 751 upper base, 7511 air guide groove, 7512 air guide hole, 752 lower base, 7521 air guide gap, 753 base baffle, 76 fixing frame, 8 winding machine. DETAILED DESCRIPTION

[0034] Example 1:

[0035] Please refer to Figures 1-8 A kind of preparation device of high-loft nonwoven fabric, including web forming system and the finishing system connected with it, the web forming system includes material conveying system 1, double screw extruder 2, cooling side blowing system 3 and web former 4 arranged in sequence from top to bottom;The finishing system includes hot calender 5, hot air pre-bonding device 7, hot air bonding device 6 and winding machine 8 arranged in sequence from left to right.

[0036] Hot air pre-bonding device 7 includes air inlet 71, pre-bonding body 72, several electric heating rods 73, base 75 and fixing frame 76.

[0037] As Figures 2-3As shown, the air inlet 71 includes a first air inlet 711 and a second air inlet 712, and a baffle 713 is detachably connected to the outer end of the first air inlet 711 and the second air inlet 712; the first air inlet 711 communicates with the space for air flow in the pre-consolidation body. A pair of air inlets 71 are fixedly connected to the two ends of the pre-consolidation body 72, and a plurality of electric heating rods 73 are embedded and fixedly connected in the interior of the pre-consolidation body 72; the base 75 is fixedly connected to the lower end of the pre-consolidation body 72; the outer side of the pre-consolidation body 72 and the base 75 is half-covered with thermal insulation cotton 74, and the lower end of the thermal insulation cotton 74 is detachably connected with the base 75, which can effectively reduce the heat loss of the hot air pre-consolidation device 7. The fixing frame 76 is fixedly connected to the lower end of the air inlet 71 to ensure that the hot air pre-consolidation device 7 does not easily deviate during use.

[0038] As shown in Figures 4-5 The pre-consolidation body 72 includes a pair of pre-consolidation shells 721, which are detachably connected, and a blow-off passage 7211 is formed at a position deviated from the center line when the pair of pre-consolidation shells 721 are connected together, and a recess 7212 is formed on the side of the pre-consolidation shell 721 away from the blow-off passage 7211; a cover plate 722 is detachably connected to the side of the recess 7212, which completely covers the outer side of the recess 7212 and forms a closed heating cavity together with the pre-consolidation shell 721. A plurality of installation spaces 7213 for installing the electric heating rods 73 are formed in the pre-consolidation shell 721, and the installation spaces 7213 are located between the blow-off passage 7211 and the heating cavity, and the side wall of the installation space 7213 is provided with a blow-off hole communicating with the blow-off passage 7211 and the heating cavity; so that the air flow passing through the blow-off hole can be heated. In addition, a pair of horizontally placed protrusions are arranged in the recess 7212, which increases the contact area between the pre-consolidation shell 721 and the air flow, thereby improving the heating efficiency of the hot air pre-consolidation device 7 on the incoming air flow.

[0039] As shown in Figures 6-7As shown, the base 75 includes an upper base 751 and a pair of lower bases 752 fixedly connected to the lower end of the upper base 751; the connection of the pair of lower bases 752 leaves a gap for the outflow of air flow, so that the heated hot air can flow out from the lower end of the lower base 752. The upper end of the upper base 751 is provided with a wind guide groove 7511 communicating with the heating cavity, and the upper end of the lower base 752 and the lower end of the upper base 751 form a wind guide gap 7521, and the bottom end of the wind guide groove 7511 is provided with a plurality of wind guide holes 7512, which communicate with the wind guide gap 7521, so that the heated air flow can be guided into the upper base 751 along the wind guide groove 7511; then flow out from the gap between the pair of lower bases 752 along the wind guide gap 753. Such a design can make the hot air form a hot air flow with high speed, which provides a guarantee for the loftiness and consolidation success of the fiber web in the non-woven fabric preparation process.

[0040] The lower base 752 protrudes upward to form a drainage column towards the wind guide gap 7521, and the distance between the drainage column and the upper base 751 is less than the height of the wind guide gap 7521, so that the air flow can appear throttling phenomenon when flowing in the wind guide gap 7521, thereby improving the flow rate and uniformity of the hot air, so that the hot air pre-consolidation device 7 can produce air flow with high uniformity and fast speed.

[0041] The center line of the upper base 751 is provided with a protrusion at the lower position, which matches the gap between the pair of lower bases 752; the protrusion and the pair of lower bases 752 form a small flow channel, so that the hot air in the wind guide gap 7521 can be collected in the gap, thereby making the hot air flow out of the gap uniformly and quickly, ensuring that the hot air has a fast air speed, and also ensuring the uniformity of the hot air, so that the non-woven fabric prepared by the hot air pre-consolidation device 7 can have high loftiness.

[0042] The base baffle 753 is fixedly connected to both ends of the upper base 751 and the lower base 752, and completely covers both ends of the upper base 751 and the lower base 752, effectively preventing the hot air from leaking from both ends of the base 75, thereby ensuring the normal use of the hot air pre-consolidation device 7.

[0043] As shown in Figure 8 In use, first open the electric heating rod 73, heat the pre-consolidation device 7, then detachably connect the first air inlet 711 with the external air producing device, and then fix the baffle 713 at the outer end of the first air inlet 711 or the second air inlet 712, so that the incoming air flow cannot flow out from the first air inlet 711 or the second air inlet 712. The air flow entering from the air inlet 71 is as shown in Figure 8As shown by the middle red guide line, the air flows through the air supply channel 7211, the heating cavity, and then gathers in the air guide groove 7511, and flows out from the gap between the two lower bases 752 under the action of the air guide hole 7512 and the air guide gap 7521.

Claims

1. An apparatus for making a high loft nonwoven fabric comprising a web forming system and a finishing system connected thereto, characterized in that: The post-finishing system comprises a hot air pre-fixing device (7), the hot air pre-fixing device (7) comprises a pre-fixing body (72) and heat preservation cotton (74), an air supply channel (7211) is formed in the pre-fixing body (72), and air inlets (71) in communication with the air supply channel (7211) are fixedly connected to both ends of the pre-fixing body (72); heating cavities in communication with the air supply channel (7211) are formed in the two side walls of the pre-fixing body (72), and an electric heating rod (73) is embedded and fixedly connected to the upper end of the pre-fixing body (72); a base (75) is fixedly connected to the lower end of the pre-fixing body (72), the heat preservation cotton (74) is semi-covered on the outer sides of the pre-fixing body (72) and the base (75), and the lower end of the heat preservation cotton (74) is detachably connected to the base (75); a drainage groove is formed in the inside of the base (75) and is in communication with the heating cavities and the lower end of the base (75); and a fixing frame (76) is fixedly connected to the lower end of the air inlet (71).

2. The apparatus of claim 1, wherein: The pre-fixing body (72) comprises a pair of detachably connected pre-fixing shells (721), the air supply channel (7211) is located at an upper position of the central line after the pre-fixing shell (721) is installed, recesses (7212) are formed in the two sides of the pre-fixing body (72), and cover plates (722) are detachably connected to the outer ends of the recesses (7212), and the heating cavities are surrounded by the recesses (7212) and the cover plates (722).

3. The device for preparing a high loft nonwoven fabric according to claim 1, wherein: The pre-fixing body (72) is provided with an installation space (7213) for embedding the electric heating rod (73), and the installation space (7213) is in communication with the recesses (7212) and the air supply channel (7211).

4. The apparatus of claim 3, wherein the apparatus further comprises a second air supply. The base (75) comprises an upper base (751) and a pair of lower bases (752), the pair of lower bases (752) are fixedly connected to the lower end of the upper base (751), the lower end of the upper base (751) and the upper end of the lower base (752) form an air guiding gap (7521), a pair of air guiding grooves (7511) are formed in the upper end of the upper base (751), a plurality of air guiding holes (7512) are formed in the lower end of the air guiding groove (7511), the air guiding holes (7512) are in communication with the air guiding gap (7521) and the air guiding groove (7511), a gap for air flow is formed between the pair of lower bases (752) after installation, the gap is in communication with the air guiding gap (7521), base baffles (753) are fixedly connected to the two ends of the upper base (751) and the lower base (752), the base baffles (753) completely cover the two ends of the upper base (751) and the lower base (752), and the drainage groove is composed of the air guiding groove (7511), the air guiding gap (7521), the air guiding hole (7512) and the gap.

5. The apparatus of claim 4, wherein: The lower base (752) is upwardly protruded with a drainage column towards the air guiding gap (7521).

6. The apparatus of claim 1, wherein: The air inlet (71) comprises a first air inlet (711) and a second air inlet (712), and the first air inlet (711) and the second air inlet (712) are fixedly connected to two ends of the pre-consolidation body (72) respectively; the outer ends of the first air inlet (711) and the second air inlet (712) are detachably connected with a baffle (713).

7. The apparatus of claim 1, wherein: The web forming system comprises a material conveying system (1), a screw extruder (2), a cooling side blowing system (3), a web former (4) and a hot calender (5); the material conveying system (1), the screw extruder (2), the cooling side blowing system (3) and the web former (4) are arranged in sequence from top to bottom.

8. The apparatus of claim 1, wherein: The post-finishing system further comprises a hot calender (5), a hot air consolidation device (6) and a winding machine (8); the hot calender (5), the hot air pre-consolidation device (7), the hot air consolidation device (6) and the winding machine (8) are arranged in sequence from the web forming system to a direction away from the web forming system.

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