CN218115688U - Polyester spun-bonding production equipment combining positive pressure airflow drafting and negative pressure airflow drafting - Google Patents
Polyester spun-bonding production equipment combining positive pressure airflow drafting and negative pressure airflow drafting Download PDFInfo
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- CN218115688U CN218115688U CN202222193843.0U CN202222193843U CN218115688U CN 218115688 U CN218115688 U CN 218115688U CN 202222193843 U CN202222193843 U CN 202222193843U CN 218115688 U CN218115688 U CN 218115688U
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Abstract
A polyester spun-bonding production device combining positive and negative pressure airflow drafting comprises a spinning box body, a side blowing box, a positive pressure drafting device, a negative pressure drafting device, a diffusion air channel, a web former, a lower layer air box air inlet fan, an upper layer air box air inlet fan, a positive pressure drafting air inlet centrifugal machine and a rack which are arranged together; the negative pressure drafting device is arranged at the lower end of the positive pressure drafting device, and the upper end feed port of the negative pressure drafting device and the lower end discharge port of the positive pressure drafting device are hermetically arranged together; the upper end of the diffusion air channel and the discharge port at the lower end of the negative pressure drafting device are installed together, and the web former is installed at the lower end of the diffusion air channel. This novel malleation draft ware can draft raw materials fibre, makes it refine, and fibre macromolecule orientation degree, crystallinity increase simultaneously, and the fibre has good physical properties, and negative pressure draft ware lower extreme diffusion wind channel is favorable to stabilizing the fibre web and reduces suction fan load, has still avoided the draft back fibre to receive the interference and the influence of environment air current, and consequently finished product non-woven fabrics becomes the net homogeneity comparatively good.
Description
Technical Field
The utility model relates to a dacron non-woven fabrics production facility technical field, especially a dacron spun-bonded method production facility that just, negative pressure air current draft combine.
Background
The spun-bonding method is a technique of melting and spinning a high polymer raw material, generating fibers through air flow drafting, then forming a web through splitting, and finally preparing non-woven fabrics with different performances and wide application by different consolidation methods such as hot rolling, hot air, needling, spunlace, ultrasonic waves and the like. At present, the spun-bonding production technology is mainly applied to two non-woven fabrics of terylene and polypropylene. During production, the fiber is usually drafted by airflow, which has the advantages of short flow and high efficiency, and the existing airflow drafting technology mainly comprises positive pressure and negative pressure, wherein the positive pressure drafting is used for the production of the polyester spunbonding method, and the negative pressure drafting is mainly used for the production of the polypropylene spunbonding method.
FIG. 1 is a production flow of existing polyester spun-bonding method using positive pressure drafting, after polyester raw material enters a box 11 (spinning box 1), the polyester raw material is heated and melted into melt by a screw extruder in the box 11, the melt is removed of impurities by a melt filter, the melt is input into a spinning component in a heat insulation box after being metered by a metering pump and extruded into melt trickle, the melt trickle enters a positive pressure drafting device 13 under the cooling of cross air blow of a cross air blow box 12, the positive pressure drafting device 13 forms a high-speed and top-down uniform stable airflow through a special design, the fiber is drafted to be refined, meanwhile, due to the drafting effect, the orientation degree and the crystallinity of fiber macromolecules are increased, the fiber has good physical properties, the fiber drawn out of the positive pressure drafting device 13 is mutually covered and overlapped by lapping of a lapping machine 14 to form a uniform fiber web, then non-woven fabrics with different properties are manufactured through different consolidation techniques, and after subsequent winding, the non-woven fabrics are cut again according to the requirements of product width and roll length, and are packaged and sold. In fig. 1, 15 is the air intake fan of the lower air duct of the side blow box, 16 is the air intake fan of the upper air duct of the side blow box, and 17 is the air intake centrifuge of the positive pressure draft device (the lower end of the positive pressure draft device generates the downward traction force).
As shown in fig. 1, the requirement of the fiber structure forming process in the production of the polyester spun-bond method on the drawing speed is relatively high, and the drawing speed of about 5000 m/min is required to enable the polyester fiber to have enough orientation degree and crystallinity degree, so as to form a stable structure. Considering that the air draft has a large slip phenomenon and the requirement on the speed of the draft air flow is higher, a positive pressure air draft technology is usually adopted, and the pressure is generally greater than 0.1MPa. The drafting airflow is at the upper part of the positive pressure drafting device 13, and the high-speed airflow is output downwards from a specially designed symmetrical slit (plate type drafting device) or an annular slit (tube type drafting device), and the tows are clamped for drafting, thinning and forming. The positive pressure draft device 13 is arranged between the spinning beam 11 and the web former 14, and an open design is formed among the spinning beam 11, the cross air blowing beam 12 and the positive pressure draft device 13. The cooling device formed by the side blowing box 12 ensures that melt extruded from the spinning assembly arranged in the spinning box 11 has enough cooling temperature and time, is beneficial to fiber solidification and molding, and the open design also ensures that ambient air is sucked into the drafting airflow as supplementary airflow besides the compressed air provided by the side blowing box upper air duct inlet air duct 16, so that the drafting airflow quantity is increased, and the airflow drafting speed is also improved. Because the outlet of the positive pressure drafting device 13 is arranged in an open manner to the net surface of the net forming machine 14, the drafting airflow can be diffused quickly, the airflow speed is reduced, the high-speed airflow is prevented from influencing the fiber net forming, and a corresponding exhaust fan is arranged below the net forming machine under the actual situation to exhaust the drafting airflow and partial environmental airflow, so that the fiber net is adsorbed on the conveying net belt. Although the positive pressure drafting production of the polyester non-woven fabric has more advantages, the positive pressure drafting production of the polyester non-woven fabric is limited by the structure, and the fibers are easily disturbed by the interference of environmental air flow before entering a web former, so the web forming uniformity of the polyester non-woven fabric produced by the polyester spun-bond method is influenced to a certain extent, and the uniformity of the polyester spun-bond non-woven fabric is not as good as that of the polypropylene spun-bond non-woven fabric.
In the production of polypropylene fiber spun-bonding method, the requirement of fiber forming process on drafting speed is not as high as that of polyester fiber spun-bonding method, negative pressure drafting technique is usually adopted, and air pressure is less than 0.1MPa. As shown in fig. 2, the negative pressure draft device 20 is a closed device between the spinning beam 18 and the web side of the web former 22, the negative pressure draft device 20 is a structure with a large cross section area at two ends and a small middle part, and has a large upper cross section area and a certain height, the side blow box 17 can input cooling air to cool melt streamlets extruded from the spinning components in the spinning beam 18, and a supplementary air input device (provides flowing air through the lower wind box air intake fan 23) to increase the total amount of draft air flow to increase the draft speed. Because the cross air blowing has a cooling effect on the melt stream, the air speed cannot be too high, and if the cooling air speed is too high, the melt stream is disturbed and even mutually adhered, so that the normal production is influenced. The lower cross-sectional area of the middle part of the negative pressure draft device 20 can obtain a higher draft speed because the air flow speed is inversely proportional to the passing cross-sectional area under the condition of a certain air flow amount, the cross-sectional area is small, the draft air flow speed is high, and the fiber thinning effect is good. The outlet of the negative pressure drafting device 20 is opposite to the suction fan orifice below the web former 22, and is a section of diffusion closed pipeline (diffusion pipeline 21), so that the air flow speed at the outlet can be reduced, and the fiber web can be stabilized and the load of the suction fan can be reduced. In conclusion, the negative pressure drafting is to draft, thin, form and form the web on the tows in a relatively closed drafting device, and the interference and the influence of the environmental air flow are avoided, so that the uniformity of the web formation is better. In fig. 2, 23 is the air intake fan of the lower air duct of the side blow box, and 24 is the air intake fan of the upper air duct of the side blow box. Although the polypropylene fiber spunbond method has more advantages, the drafting speed is slower, and the drafting speed required by the production of the terylene is faster, so the production of the existing negative pressure polypropylene fiber spunbond method can not be directly used for the production of the terylene.
SUMMERY OF THE UTILITY MODEL
Because the structure limits, production polyester non-woven fabrics has the net formation homogeneity to receive the interference and the influence of environment air current in order to overcome current adoption malleation draft polyester non-woven fabrics production facility, and the finished product quality of producing can not obtain the shortcoming of guaranteeing to and negative pressure draft polypropylene fibre non-woven fabrics production facility, the unable drawback that directly is used for polyester non-woven fabrics production, the utility model provides a combine malleation draft equipment and negative pressure draft equipment's advantage, under relevant mechanism combined action, on can guaranteeing suitable tractive power basis, can also prevent that the air current from bringing the negative impact to the net formation homogeneity a dacron spunbond production facility that just, negative pressure air current draft combined.
The utility model provides a technical scheme that its technical problem adopted is:
a polyester spun-bonding production device combining positive and negative pressure airflow drafting comprises a spinning box body, a side blowing box, a positive pressure drafting device, a negative pressure drafting device, a diffusion air channel, a web former, a lower layer air box air inlet fan, an upper layer air box air inlet fan, a positive pressure drafting air inlet centrifugal machine and a rack; the device is characterized in that the spinning box body is arranged at the upper end of the frame, two sets of side blowing boxes are arranged, the two sets of side blowing boxes are respectively arranged at two sides of the lower end of the spinning box body, and the positive pressure drafting device is arranged at the lower part between the two sets of side blowing boxes; the negative pressure drafting device is arranged at the lower end of the positive pressure drafting device, and an upper end feeding hole of the negative pressure drafting device and a lower end discharging hole of the positive pressure drafting device are hermetically arranged together; the upper end of the diffusion air channel and the discharge port at the lower end of the negative pressure drafting device are installed together, the web former is installed at the lower end of the diffusion air channel, and the upper end of the web former and the lower end of the diffusion air channel are separated by a distance; the air inlet fan of the lower layer air box, the air inlet fan of the upper layer air box and the positive pressure draft air inlet centrifugal machine are respectively arranged at the rear side end of the rack, the air outlet of the air inlet fan of the upper layer air box is connected with the upper air channels of the two sets of side blowing boxes, the air outlet of the air inlet fan of the lower layer air box is connected with the lower air channels of the two sets of side blowing boxes, and the air outlet of the positive pressure draft air inlet centrifugal machine is connected with the air channels of the positive pressure draft devices.
Furthermore, the inner sides of the two sets of side air blowing boxes are positioned between the two side ends of the outlet of the spinning assembly in the lower inner part of the spinning box body.
Further, the upper end feed inlet of the positive pressure drafting device and the outlet of the spinning assembly are positioned on a vertical plane.
Furthermore, the inside of the positive pressure drafting device, the negative pressure drafting device and the diffusion air duct are of an intercommunicating structure.
Furthermore, two vent pipes are arranged at the lower end of the web former.
The utility model discloses beneficial effect is: the novel drafting machine combines the advantages of the positive pressure drafting machine and the negative pressure drafting machine, is mainly used for producing polyester non-woven fabrics, and under the action of relevant mechanisms, the raw material fibers are drafted by the large high-speed airflow drafting force formed by the positive pressure drafting machine to be refined, meanwhile, the orientation degree and the crystallinity degree of fiber macromolecules are increased, and the fibers have good physical properties; in this is novel, because seal structure between malleation draft ware and the negative pressure draft ware, and the suction fan mouth of pipe of negative pressure draft ware lower extreme export and lapper below designs relatively, be one section closed conduit between the diffusion wind channel of negative pressure draft ware lower extreme export and lapper upper end, this section closed conduit does not have the drafting effect, only make the air velocity of export reduce, be favorable to stabilizing the fibre web like this and reduce suction fan load, still avoided the draft back fibre to receive the interference and the influence of ambient air current, therefore the homogeneity of finished product non-woven fabrics netting is better. Through the technical scheme, the quality of the produced polyester non-woven fabric is guaranteed, and the polyester non-woven fabric has a good application prospect.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 and 2 are schematic structural diagrams of polyester fiber spunbond production equipment and polypropylene fiber spunbond production equipment in the prior art respectively.
Fig. 3 is a schematic plan view of the present invention.
Fig. 4 is a schematic view of the three-dimensional structure of the present invention.
Detailed Description
As shown in fig. 3 and 4, a polyester spunbonding production device combining positive and negative pressure air draft comprises a spinning manifold 1 with a screw extruder, a melt filter, a heat preservation manifold, a metering pump, a spinning assembly and the like inside, a side blowing box 2, a positive pressure draft device 3, a negative pressure draft device 4, a diffusion air duct 5, a web former 6, a lower layer air box air inlet fan 7, an upper layer air box air inlet fan 8, a positive pressure draft air inlet centrifuge 9 and a rack 10; the spinning box body 1 is arranged at the upper end of the frame 10 through a screw nut, two sets of side blowing boxes 2 are arranged, the two sets of side blowing boxes 2 are respectively arranged at two sides of the lower end of the spinning box 1 through the screw nut, and the positive pressure draft device 3 is arranged at the lower part between the two sets of side blowing boxes 2 through the screw nut; the negative pressure drafting device 4 is arranged at the lower end of the positive pressure drafting device 3 through a screw nut, and an upper end feed inlet of the negative pressure drafting device 4 and a lower end discharge outlet of the positive pressure drafting device 3 are hermetically arranged together; the upper end of the diffusion air duct 5 is installed together with a discharge port at the lower end of the negative pressure drafting device 4 through a screw nut, the web former 6 is installed at the lower end of the diffusion air duct 5 through a screw nut, and a certain distance is reserved between the upper end of the web former 6 and the lower end of the diffusion air duct 5; lower floor's bellows air intake fan 7, upper bellows air intake fan 8, malleation draft air intake centrifuge 9 installs the back side in frame 10 through screw nut respectively, upper bellows air intake fan 8's air outlet and two sets of side blow case 2 upper air channels IV and II are respectively through pipeline parallel connection, lower floor's air outlet and two sets of side blow case 2 lower air channels III and I are respectively through pipeline parallel connection of lower layer air intake fan 7, malleation draft air intake centrifuge 9's air outlet and 3 front end middle part both sides's of malleation draft wind channel VI, V are respectively through pipeline connection.
In fig. 3 and 4, the inner sides of the two sets of side blow boxes 2 are positioned between the two sides of the spinning assembly outlet at the lower part of the spinning beam 1. The upper end feed inlet of the positive pressure drafting device 3 and the outlet of the spinning assembly are positioned on a vertical plane. The positive pressure drafting device 3, the negative pressure drafting device 4 and the diffusion air duct 5 are internally provided with intercommunicating structures. The lower end of the web former 6 is provided with two vent pipes 25.
As shown in figures 3 and 4, the novel polyester non-woven fabric production device is mainly used for production of polyester non-woven fabrics, during production, after polyester raw materials enter a box body 1 (a spinning box 1), the polyester raw materials are heated and melted into melt through a screw extruder in the box body 1, the melt is subjected to impurity removal through a melt filter, the melt is input into a spinning assembly arranged in a heat insulation box after being measured through a metering pump and is extruded into melt trickle, the melt trickle enters a positive pressure drafting device 3 under the cooling of lateral blowing of two sets of lateral blowing boxes 2, air outlets of the two sets of lateral blowing boxes 2 are divided into two layers, cold air blown out by an upper layer air box air intake fan 8 enters through lateral blowing boxes I V and II, cold air blown out by a lower layer air box air intake fan 7 enters through lateral blowing boxes III and I, cold air is divided into an upper layer and a lower layer through cross air blowing to cool a melt and is solidified into a fiber bundle, the fiber bundle is subjected to positive pressure drafting, the positive pressure drafting device 3 is provided with a row of small air outlets discharging air downwards, high-pressure air blown out by the positive pressure drafting air inlet centrifugal machine 9 enters through V and VI air inlets of the positive pressure drafting device 3 and enters the left side and the right side in the positive pressure drafting device 3, formed air flow can give positive pressure to the fiber bundle, a sealing channel is formed between the positive pressure drafting device 3 and the negative pressure drafting device 4 and can allow the fiber bundle to pass through, high-speed air flow drafts the fiber, the fiber is refined, meanwhile, the orientation degree and the crystallinity of fiber macromolecules are increased, and the fiber has good physical performance. In practice, the thinning, orientation and increased crystallinity of the fibers occurs primarily at a short distance from the spin pack assembly.
Fig. 3 and 4 show that, in the novel structure, the outlet of the negative pressure draft device 4 is designed to be opposite to the mouth of the suction fan pipe (vent pipe 25) below the web former 6, a section of closed pipeline is arranged between the outlet at the lower end of the negative pressure draft device 4 and the diffusion air duct 5 at the upper end of the web former 6, the section of closed pipeline has no drafting effect, only the air velocity at the outlet is reduced, which is beneficial to stabilizing the fiber web and reducing the load of the suction fan, and the fiber after drafting is prevented from being interfered and influenced by the ambient air flow, so the uniformity of the finished product of the non-woven web is better. Through all above-mentioned mechanisms combined action, the advantage of this novel combination malleation draft equipment and negative pressure draft equipment under relevant mechanism combined action, can guarantee on suitable tractive force basis, can also prevent the adverse effect that the air current brought to the net formation homogeneity.
The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present specification describes embodiments, these embodiments are not intended to encompass only a single embodiment, and such description is merely for clarity, and those skilled in the art will be able to refer to the specification as a whole, and the embodiments may be suitably combined to form other embodiments as will be appreciated by those skilled in the art.
Claims (5)
1. A polyester spun-bonding production device combining positive and negative pressure airflow drafting comprises a spinning box body, a side blowing box, a positive pressure drafting device, a negative pressure drafting device, a diffusion air channel, a web former, a lower layer air box air inlet fan, an upper layer air box air inlet fan, a positive pressure drafting air inlet centrifugal machine and a rack; the device is characterized in that the spinning box body is arranged at the upper end of the frame, two sets of side blowing boxes are arranged, the two sets of side blowing boxes are respectively arranged at two sides of the lower end of the spinning box body, and the positive pressure drafting device is arranged at the lower part between the two sets of side blowing boxes; the negative pressure drafting device is arranged at the lower end of the positive pressure drafting device, and an upper end feeding hole of the negative pressure drafting device and a lower end discharging hole of the positive pressure drafting device are hermetically arranged together; the upper end of the diffusion air channel and the discharge port at the lower end of the negative pressure drafting device are installed together, the web former is installed at the lower end of the diffusion air channel, and the upper end of the web former and the lower end of the diffusion air channel are separated by a distance; the air inlet fan of the lower layer air box, the air inlet fan of the upper layer air box and the positive pressure draft air inlet centrifugal machine are respectively arranged at the rear side end of the rack, the air outlet of the air inlet fan of the upper layer air box is connected with the upper air channels of the two sets of side blowing boxes, the air outlet of the air inlet fan of the lower layer air box is connected with the lower air channels of the two sets of side blowing boxes, and the air outlet of the positive pressure draft air inlet centrifugal machine is connected with the air channels of the positive pressure draft devices.
2. The terylene spunbond production equipment combining positive and negative pressure airflow drafting according to claim 1, wherein the inner sides of the two sets of lateral blowing boxes are positioned between the two lateral ends of the outlet of the spinning assembly in the lower inner part of the spinning box body.
3. The terylene spunbonded production equipment combining positive pressure airflow drawing and negative pressure airflow drawing as claimed in claim 1, wherein a feed inlet at the upper end of the positive pressure drawing device and an outlet of the spinning assembly are positioned on a vertical plane.
4. The terylene spunbonded process production equipment combining positive pressure airflow drawing and negative pressure airflow drawing as claimed in claim 1, wherein the positive pressure drawing device, the negative pressure drawing device and the diffusion air duct are of an intercommunicating structure.
5. The production equipment of the terylene spunbonded method combining the positive air flow drafting and the negative air flow drafting as claimed in claim 1, wherein the lower end of the web former is provided with two vent pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222193843.0U CN218115688U (en) | 2022-08-20 | 2022-08-20 | Polyester spun-bonding production equipment combining positive pressure airflow drafting and negative pressure airflow drafting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222193843.0U CN218115688U (en) | 2022-08-20 | 2022-08-20 | Polyester spun-bonding production equipment combining positive pressure airflow drafting and negative pressure airflow drafting |
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| Publication Number | Publication Date |
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| CN218115688U true CN218115688U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222193843.0U Active CN218115688U (en) | 2022-08-20 | 2022-08-20 | Polyester spun-bonding production equipment combining positive pressure airflow drafting and negative pressure airflow drafting |
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| CN (1) | CN218115688U (en) |
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- 2022-08-20 CN CN202222193843.0U patent/CN218115688U/en active Active
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