CN111850836A - Uniform negative pressure drum-type web former of melt-blowing equipment and melt-blown fabric production process - Google Patents
Uniform negative pressure drum-type web former of melt-blowing equipment and melt-blown fabric production process Download PDFInfo
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- CN111850836A CN111850836A CN202010665139.3A CN202010665139A CN111850836A CN 111850836 A CN111850836 A CN 111850836A CN 202010665139 A CN202010665139 A CN 202010665139A CN 111850836 A CN111850836 A CN 111850836A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The application relates to the technical field of melt-blown fabric production, and aims to provide an even negative pressure drum-type web former of melt-blown equipment and a melt-blown fabric production process, and the key points of the technical scheme are as follows: the winding machine comprises a rack, a receiving roller arranged on the rack and a winding mechanism positioned at one end of the rack in the discharging direction, wherein the rack is provided with a first driving motor and a second driving motor; the receiving roller comprises an inner cylinder and a filter screen arranged on the outer layer of the inner cylinder, a plurality of vent holes are uniformly distributed on the wall of the inner cylinder, a negative pressure guide cylinder is axially arranged in the inner cylinder, and the negative pressure guide cylinder is communicated with a negative pressure source; a pair of spreading roller sets parallel to the receiving roller are rotatably arranged below the receiving roller; the production process of the traceless melt-blown fabric comprises the following steps: raw material feeding, melt metering, die head spinning, yarn dividing and net laying, spreading and shaping, drafting and winding. The invention has the advantages of even melt-blown net formation and even and traceless cloth.
Description
Technical Field
The invention relates to the technical field of melt-blown fabric production and manufacturing, in particular to a uniform negative pressure drum-type web former of melt-blown equipment and a melt-blown fabric production process.
Background
The melt-blown method for manufacturing the non-woven fabric is a universal and cost-effective method for directly producing the non-woven fabric with the microfiber structure by using the polymer, and the non-woven fabric manufactured by the method has excellent filtering property, shielding property, heat insulation property and oil absorption property, so the non-woven fabric is widely applied to the fields of manufacturing medical and industrial masks, heat-insulating materials, filtering materials, oil-absorbing materials, sound-insulating materials and the like.
Chinese patent No. CN203754951U discloses a web forming device of a nonwoven fabric melt-blown web former, which comprises a receiving roller, a winding roller, an upper frame and a lower frame, wherein the receiving roller is fixedly connected to the upper frame, a floating rod is fixedly connected to one side end of the upper frame, and the winding roller is supported on the floating rod through a rolling bearing to form a floating pressurization winding mechanism.
Although the technical scheme in the prior art can improve the adaptability of the coiling tension of the coiling circular roller through the floating pressurizing coiling mechanism and reduce the phenomenon that the cloth is not wrinkled due to the change of the tension, in the actual production, the superfine fibers sprayed out of the melt-blowing die head are sprayed to the surface of the receiving roller and are spread and formed, and the phenomenon of uneven forming can exist, and the cloth can be wrinkled and folded after the cloth with uneven forming is directly coiled by the coiling circular roller. Therefore, further improvements are needed.
Disclosure of Invention
In order to reduce the fold that the polymer melt produced when receiving cylinder surface becomes the net design, improve meltblown fabric homogeneity and product quality, the application provides a melt-blown equipment even negative pressure cylinder lapper and melt-blown fabric production technology.
In a first aspect, the application provides a melt-blown equipment uniform negative pressure drum-type web former which adopts the following technical scheme:
a cylinder web former with uniform negative pressure for melt-blowing equipment comprises a rack, a receiving roller arranged on the rack and a winding mechanism positioned at one end of the rack in the discharging direction, wherein the rack is provided with a first driving motor and a second driving motor; the receiving roller comprises an inner roller and a filter screen welded on the outer layer of the inner roller, the filter screen is welded with a twill weld seam, the twill weld seam is formed by spirally welding along the outer wall of the inner roller, a plurality of vent holes are uniformly distributed on the wall of the inner roller, a negative pressure guide cylinder is axially arranged in the inner roller, and the negative pressure guide cylinder is communicated with a negative pressure source; a pair of spreading roller sets parallel to the receiving roller is rotatably arranged below the receiving roller.
By adopting the technical scheme, the negative pressure source is started to suck air into the negative pressure guide cylinder, and after the air in the inner cylinder is uniformly guided by the negative pressure guide cylinder, uniform negative pressure distribution is formed on the surface of the outer filter screen of the receiving roller, so that superfine fibers sprayed by the melt-blown die head can be more uniformly spread on the surface of the receiving roller, the uniformity of the superfine fiber web formation is effectively improved, and the probability of wrinkles and creases generated on the surface of a subsequent melt-blown cloth cover is reduced; in addition, the filter screen is welded and fixed in a spiral oblique welding mode, the length of a welding seam at the welding position of the filter screen can be increased, and compared with butt straight welding, the spiral oblique welding mode can reduce the width of overlapping of the edges of the welding position as far as possible while ensuring the welding firmness of the filter screen, so that the flatness of the welding of the filter screen is improved, the attaching degree and the uniformity of superfine fibers when the superfine fibers are spread on the surface of the filter screen to form a net are improved, and the probability of indentation generated by melt-blown cloth is reduced.
Preferably, the negative pressure draft tube and the inner tube are coaxially arranged, the two ends of the negative pressure draft tube penetrate through the two ends of the inner tube and are fixedly connected to the two sides of the frame, the inner tube is rotatably connected with the two ends of the negative pressure draft tube, a plurality of air suction openings are formed in the top wall of the negative pressure draft tube along the axial direction, the two ends of the negative pressure draft tube are respectively provided with an exhaust pipe communicated with the negative pressure draft tube, and the end part of the exhaust pipe, far away from the direction of the negative pressure draft tube, is jointly communicated with a negative pressure source.
Through adopting above-mentioned technical scheme, the negative pressure source is through the aspiration channel that communicates in negative pressure draft tube both ends in step to the inside air that sucks of inner tube, and the air of suction can be steadily sucked the discharge through the inlet scoop to the homogeneity that receiving cylinder surface negative pressure distributes has effectively been improved.
Preferably, a fluted disc is arranged at one end of the receiving roller close to the first driving motor, and a transmission gear meshed with the fluted disc is arranged at the shaft end of an output shaft of the first driving motor.
By adopting the technical scheme, the first driving motor is started, the first driving motor drives the transmission gear to rotate, and the transmission gear drives the fluted disc meshed with the transmission gear to synchronously rotate, so that the receiving roller is driven to rotate.
Preferably, a pair of spreading roller sets parallel to the receiving roller is rotatably arranged below the receiving roller, each spreading roller set comprises a first spreading roller and a second spreading roller, a third driving motor used for driving the first spreading roller to rotate is arranged at one end of each first spreading roller, and a fourth driving motor used for driving the second spreading roller to rotate is arranged at one end of each second spreading roller.
Through adopting above-mentioned technical scheme, start the first roller that spreads of third driving motor can drive and rotate, start the fourth driving motor and can drive the second roller that spreads and rotate to realize that first roller, the second roller that spreads and spread the roll-in of melt-blown semi-manufactured goods, receiving cylinder drives the melt-blown semi-manufactured goods that originally congeals the net and rolls through the roller and spreads, make the melt-blown semi-manufactured goods that originally congeals the net design into homogeneous, traceless melt-blown cloth.
Preferably, the side walls of the rack close to the two end parts of the first spreading roller are respectively provided with a pair of first adjusting grooves, the rack is positioned on the outer sides of the first adjusting grooves and is respectively provided with a first heightening mechanism, the first heightening mechanism comprises a first support frame and a first support block connected to the first support frame in a sliding manner, the end parts of the first spreading roller are respectively connected to the middle of the first support block in a rotating manner through bearings, the outer side wall of the first support block is provided with a mounting plate, a third driving motor is fixedly connected to the mounting plate, the output shaft of the third driving motor is connected with one end of a roller shaft of the first spreading roller in a shaft coupling manner, the top of the first support frame is provided with a top plate, an adjusting screw rod is arranged between the top plate and the top wall of the first support block, and the bottom end of the adjusting screw; the side walls of the rack close to the directions of the two end parts of the second spreading roller are respectively provided with a pair of second adjusting grooves, the rack is positioned on the outer sides of the second adjusting grooves and is respectively provided with a second height adjusting mechanism, and the second height adjusting mechanisms are the same as the first height adjusting mechanisms.
Through adopting above-mentioned technical scheme, rotate the accommodate the lead screw that first heightening mechanism, second heightening mechanism respectively, accommodate the lead screw is rotatory along the roof screw thread that first heightening mechanism, second heightening mechanism to drive first supporting block and slide along first support frame, the second supporting block slides along the second support frame, and then reach the effect of conveniently adjusting the height of first roller, second roller of spreading in order to provide different roller grinds spreading interval and dynamics.
Preferably, the adjusting screw rods of the first heightening mechanism and the second heightening mechanism are respectively provided with a fastening nut used for enhancing the connection stability of the adjusting screw rods and the top plate at one end above the top plate.
Through adopting above-mentioned technical scheme, after rotating accommodate the lead screw to predetermined position, support fastening nut rotation tightly in the roof upper surface to further improve accommodate the lead screw and be connected with the roof steadiness, and then reach the effect that improves first roller, the second roller rotational stability of spreading.
Preferably, the winding mechanism comprises a support frame and a winding roller rotatably connected to the top of the support frame, an electrostatic generator is arranged below the winding roller, an electrostatic emission rod electrically connected with the electrostatic generator is arranged right above the winding roller in parallel, the electrostatic generator is electrically connected with a grounding wire, and the grounding wire is electrically connected with a grounding connection point.
By adopting the technical scheme, the static and dynamic generator is started and generates current through the static electricity emitting rod, so that the roller surface of the winding roller generates static electricity, when the melt-blown fabric is in contact with the winding roller with the static electricity, the melt-blown fabric can be adsorbed by the static electricity, and is uniformly and tightly drawn and wound by the winding roller, so that the probability of generating wrinkles or creases on the fabric surface due to loose winding of the fabric is effectively reduced.
In a second aspect, the present application provides a meltblown fabric production process that employs the following technical scheme:
a melt-blown fabric production process comprises the following steps:
s1, raw material feeding: putting the high-molecular master batch required for preparing the melt-blown fabric into a screw extruder for melting;
s2, melt metering: conveying the melt regularly and quantitatively by a metering pump;
s3, die spinning: conveying the melt to a die head through a metering pump, and drafting a polymer melt trickle extruded from a spinneret orifice of the die head by utilizing high-speed hot air;
s4, dividing and lapping: spraying the superfine fibers formed in the step S3 on the surface of a receiving roller of a melt-blown web former, and uniformly and stably spreading the superfine fibers on the surface of the receiving roller under the negative pressure adsorption action of the receiving roller to be primarily coagulated into a web;
s5, spreading and shaping: the receiving roller drives the melt-blown semi-finished product of the primary coagulation net to pass through the first spreading roller and the second spreading roller for rolling and spreading, so that the melt-blown semi-finished product of the primary coagulation net is shaped into homogeneous and traceless melt-blown cloth;
s6, drafting and winding: and (4) performing electrostatic drafting winding on the melt-blown fabric formed in the step S5 through a winding roller.
By adopting the technical scheme, after the polymer raw material is added into the screw groove of the screw extruder, the screw rotates to drive the material to be conveyed forwards and continuously heat the material, the material is heated and melted, the glass state is changed into a high-elasticity state, and the material is changed into a viscous state along with further increase of temperature, flows plastically and is conveyed to a melt pipeline by the propulsion of the screw; the melt is conveyed to a die head for spinning through a metering pump at a certain flow rate, formed superfine fibers are sprayed on the surface of a receiving roller of a melt-blown web forming machine, the superfine fibers are uniformly coagulated into a web under the negative pressure adsorption action of the receiving roller, a formed melt-blown semi-finished product is rolled and spread by rollers of a first spreading roller and a second spreading roller, and is shaped into a homogeneous traceless melt-blown fabric, and finally, the homogeneous traceless melt-blown fabric is subjected to electrostatic drafting and winding through a winding roller.
Preferably, the melt formed in the step S1 needs to be filtered to remove impurities before the melt is processed into the step S3 for die spinning.
Through adopting above-mentioned technical scheme, the melting polymer more or less all can contain the impurity of a certain amount, including carbide, dust, coacervate particle, metal powder etc. the impurity that the fuse-element exists can damage the measuring pump, influences normal production, simultaneously, also can seriously influence the product quality of melt-blown cloth. Therefore, the melt is filtered and the impurities are removed before the die head spinning, so that the production stability and the product quality can be improved.
In summary, the present application has the following beneficial effects:
1. the negative pressure guide cylinder is arranged in the inner cylinder of the receiving roller, the top wall of the negative pressure guide cylinder is provided with a plurality of air suction ports along the axial direction, two ends of the negative pressure guide cylinder are provided with air exhaust pipes communicated with the negative pressure guide cylinder, a negative pressure source is started to suck air into the negative pressure guide cylinder, and after the air in the inner cylinder is uniformly guided by the negative pressure guide cylinder, uniform negative pressure distribution is formed on the surface of an outer filter screen of the receiving roller, so that superfine fibers sprayed by the melt-blowing die head can be more uniformly spread on the surface of the receiving roller, the uniformity of superfine fiber web formation is effectively improved, and the probability of wrinkles and creases generated on the surface of a subsequent melt-blown cloth is reduced;
2. A pair of spreading roller sets parallel to the receiving roller are rotatably arranged below the receiving roller, each spreading roller set comprises a first spreading roller and a second spreading roller, one end of each first spreading roller is provided with a third driving motor for driving the first spreading roller to rotate, one end of each second spreading roller is provided with a fourth driving motor for driving the second spreading roller to rotate, the first spreading roller and the second spreading roller are started to rotate in the direction opposite to the rotating direction of the receiving roller, and the receiving roller drives the melt-blown semi-finished product of the primary coagulation net to be rolled and spread by the rollers of the spreading roller sets, so that the melt-blown semi-finished product of the primary coagulation net is shaped into uniform and traceless melt-blown cloth;
3. the side walls of the rack close to the two end parts of the first spreading roller are respectively provided with a pair of first adjusting grooves, the outer side of the rack, which is positioned at the first adjusting grooves, is respectively provided with a first heightening mechanism, the side walls of the rack, which is close to the two end parts of the second spreading roller, are respectively provided with a pair of second adjusting grooves, the outer side of the rack, which is positioned at the second adjusting grooves, is respectively provided with a second heightening mechanism, and the first heightening mechanism and the second heightening mechanism can conveniently and accurately adjust the distance between the spreading roller group and the receiving roller, so that the effect of providing different roller grinding spreading distances and forces is achieved;
4. The electrostatic generator is arranged below the winding roller, the electrostatic emission rod electrically connected with the electrostatic generator is arranged in parallel right above the winding roller, the electrostatic generator is started and generates current through the electrostatic emission rod, so that the roller surface of the winding roller generates electrostatic charge, when the melt-blown fabric is in contact with the winding roller with the electrostatic charge, the melt-blown fabric can be adsorbed by the electrostatic, and is uniformly and closely drawn and wound by the winding roller, so that the probability of generating wrinkles or creases on the fabric surface due to loose winding of the fabric is effectively reduced.
Drawings
FIG. 1 is an overall structure diagram of a uniform negative pressure drum-type web forming machine of a melt-blowing device in an embodiment of the present application;
FIG. 2 is an exploded view of an embodiment of the present application for embodying the internal structure of a receiving drum;
FIG. 3 is a schematic view illustrating a positional relationship between a transmission gear and a toothed disc in an embodiment of the present application;
FIG. 4 is a schematic overall structure diagram for embodying the winding mechanism in the embodiment of the present application;
FIG. 5 is an enlarged view of portion A of FIG. 4;
FIG. 6 is a process flow diagram of a meltblown fabric production process in an embodiment of the present application.
In the figure, 1, a frame; 11. a first regulating groove; 12. a second regulating groove; 2. a receiving drum; 21. an inner barrel; 211. a vent hole; 22. filtering with a screen; 221. twill weld seams; 23. a fluted disc; 3. a negative pressure draft tube; 31. an air suction opening; 4. an air exhaust pipe; 5. a source of negative pressure; 6. a first drive motor; 61. a transmission gear; 7. a spreading roller set; 71. a first spreading roller; 72. a second spreading roller; 8. a third drive motor; 9. a fourth drive motor; 10. a first height adjustment mechanism; 101. a first support frame; 1011. a slide rail; 102. a first support block; 13. a top plate; 14. adjusting the screw rod; 15. fastening a nut; 16. Mounting a plate; 17. a winding mechanism; 171. a support frame; 172. a wind-up roll; 173. an electrostatic generator; 174. an electrostatic emission rod; 175. a second drive motor; 18. a ground line; 19. a ground connection point; 20. traceless melt-blown fabric.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Example (b): a even negative pressure drum-type web former of melt-blown equipment, as shown in figure 1, includes the stander 1, sets up in the receiving cylinder 2 of the stander 1, the receiving cylinder 2 includes the inner tube 21, welds the filter screen 22 in the outer layer of the inner tube 21, the filter screen 22 adopts the stainless steel material with good cooling effect, the aperture ratio of the filter screen 22 is 40% -50%; filter screen 22 welding has twill welding seam 221, twill welding seam 221 is spiral welding shaping along the inner tube 21 outer wall, mode through adopting spiral oblique welding is with filter screen 22 welded fastening, can increase the welding seam length of filter screen 22 welding department, compare in butt joint straight weld, adopt spiral oblique welding can be when guaranteeing that filter screen 22 welds firmly, reduce the width that the welding department border overlaps as far as possible, thereby improve filter screen 22 welded roughness, and then improve laminating degree and the homogeneity of superfine fiber when filter screen 22 surface spreads the network, reduce the probability that the fused spray cloth produced the indentation.
As shown in fig. 2, a plurality of vent holes 211 are uniformly distributed on the wall of the inner cylinder 21, a negative pressure draft tube 3 is axially arranged inside the inner cylinder 21, the negative pressure draft tube 3 and the inner cylinder 21 are coaxially arranged, two ends of the negative pressure draft tube 3 penetrate through two ends of the inner cylinder 21 and are fixedly connected to two sides of the frame 1, and the inner cylinder 21 and two ends of the negative pressure draft tube 3 are rotatably connected.
As shown in fig. 2, a plurality of air suction ports 31 are axially formed in the top wall of the negative pressure draft tube 3, the two ends of the negative pressure draft tube 3 are both provided with an air exhaust tube 4, the end portions of the air exhaust tube 4 far away from the direction of the negative pressure draft tube 3 are commonly communicated with a negative pressure source 5, and the negative pressure source 5 is an air suction pump in this embodiment.
As shown in fig. 2 and 3, a first driving motor 6 is disposed on the outer side wall of the frame 1 in the direction close to one end of the receiving drum 2, a transmission gear 61 is disposed at the output shaft end of the first driving motor 6, and a toothed disc 23 meshed with the transmission gear 61 is disposed at one end of the receiving drum 2 in the direction close to the first driving motor 6.
As shown in fig. 2 and 5, a pair of spreading roller sets 7 parallel to the receiving cylinder 2 is rotatably provided below the receiving cylinder 2, the spreading roller sets 7 include a first spreading roller 71 and a second spreading roller 72, the first spreading roller 71 is connected to a third driving motor 8, and the second spreading roller 72 is connected to a fourth driving motor 9. The side walls of the machine frame 1 close to the two end parts of the first spreading roller 71 are respectively provided with a pair of first adjusting grooves 11, the outer side of the machine frame 1, which is positioned at the first adjusting grooves 11, is respectively provided with a first heightening mechanism 10, the first heightening mechanism 10 comprises a first support frame 101, the top part of the first support frame 101 is provided with a top plate 13, the middle of the first support frame 101 is provided with a vertical slide rail 1011, the slide rail 1011 is connected with a first support block 102 in a sliding manner, the end parts of the first spreading roller 71 are respectively connected with the middle of the first support block 102 in a rotating manner through bearings, the outer side wall of the first support block 102 is provided with a mounting plate 16, a third driving motor 8 is fixedly mounted at the bottom wall of the mounting plate 16, and the output shaft of the third driving, an adjusting screw rod 14 is connected between the top plate 13 and the top wall of the first supporting block 102 in a threaded manner, and the bottom end of the adjusting screw rod 14 is rotatably connected to the top wall of the first supporting block 102.
As shown in fig. 2, a pair of second adjusting grooves 12 are respectively opened on the side walls of the frame 1 near the two end portions of the second spreading roller 72, and second height-adjusting mechanisms are respectively arranged on the outer sides of the second adjusting grooves 12 of the frame 1, and are the same as the first height-adjusting mechanisms 10. And fastening nuts 15 for enhancing the connection stability of the adjusting screw 14 and the top plate 13 are arranged at one ends of the adjusting screw 14 of the first height-adjusting mechanism 10 and the second height-adjusting mechanism above the top plate 13.
As shown in fig. 4 and 5, a winding mechanism 17 is disposed at one end of the frame 1 in the discharging direction, the winding mechanism 17 includes a support frame 171 and a winding roller 172 rotatably connected to the top of the support frame 171, a second driving motor 175 is disposed at the bottom of the support frame 171, and the second driving motor 175 drives the winding roller 172 to rotate in cooperation with a belt. An electrostatic generator 173 is arranged below the winding roller 172, an electrostatic emission rod 174 electrically connected with the electrostatic generator 173 is arranged in parallel above the winding roller 172, the electrostatic generator 173 is electrically connected with the grounding wire 18, and the grounding wire 18 is electrically connected with the grounding connection point 19.
Implementation principle of the embodiment:
starting a first driving motor 6 to drive a transmission gear 61 to rotate, driving the fluted disc 23 to synchronously rotate by the transmission gear 61 so as to drive the receiving roller 2 to synchronously rotate, and then starting a third driving motor 8 and a fourth driving motor 9 to respectively drive a first spreading roller 71 and a second spreading roller 72 to rotate towards the direction opposite to the receiving roller 2; the suction pump is started, the air is synchronously sucked inside the inner cylinder 21 through the air suction pipes 4 communicated with the two ends of the negative pressure guide cylinder 3, the air can be stably sucked and discharged through the air suction openings 31, and therefore uniform negative pressure distribution is formed on the surface of the filter screen 22 of the receiving cylinder 2, superfine fibers sprayed by the melt-blown die head can be more uniformly spread on the surface of the receiving cylinder 2, the uniformity of superfine fiber net formation is effectively improved, and the probability of wrinkles and creases generated on the surface of a subsequent melt-blown cloth cover is reduced. Further, the receiving roller 2 drives the melt-blown semi-finished product of the primary coagulation net to be rolled and spread by the rollers of the spreading roller group 7, so that the melt-blown semi-finished product of the primary coagulation net is shaped into uniform and traceless melt-blown cloth.
An operator starts the static electricity generator 173 and generates current through the static electricity emitting rod 174, so that the roller surface of the winding roller 172 generates static electricity, when the meltblown fabric is in contact with the winding roller 172 with the static electricity, the meltblown fabric can be adsorbed by the static electricity, and is uniformly and tightly drawn and wound by the winding roller 172, and the probability of generating wrinkles or creases on the fabric surface due to loose fabric winding is effectively reduced.
The staff can be through rotating the accommodate lead screw 14 that first heightening mechanism 10, second heightening mechanism, accommodate lead screw 14 is along first heightening mechanism, the roof 13 screw thread rotation of second heightening mechanism to drive first supporting block 102 and slide along first support frame 101, the second supporting block slides along the second support frame, and then reach the effect of conveniently adjusting the height of first roller 71, second roller 72 of spreading in order to provide different roller grinds spreading interval and dynamics.
The embodiment of the application also discloses a melt-blown fabric production process. As shown in fig. 6, the method comprises the following steps:
s1, raw material feeding: putting the high-molecular master batch required for preparing the melt-blown fabric into a screw extruder for melting;
s2, melt metering: conveying the melt regularly and quantitatively by a metering pump;
s3, die spinning: conveying the melt to a die head through a metering pump, and drafting a polymer melt trickle extruded from a spinneret orifice of the die head by utilizing high-speed hot air;
S4, dividing and lapping: spraying the superfine fibers formed in the step S3 on the surface of a receiving roller 2 of a melt-blown web former, and uniformly and stably spreading the superfine fibers on the surface of the receiving roller 2 under the negative pressure adsorption action of the receiving roller 2 to be primarily coagulated into a web;
s5, spreading and shaping: the receiving roller 2 drives the melt-blown semi-finished product of the primary coagulation net to pass through the roller grinding and spreading of the first spreading roller 71 and the second spreading roller 72, so that the melt-blown semi-finished product of the primary coagulation net is shaped into homogeneous and traceless melt-blown cloth;
s6, drafting and winding: the meltblown fabric formed in step S5 is wound by electrostatic drawing by a wind-up roll 172.
The fuse-element that forms at S1 step need filter the edulcoration before advancing to S3 step die head spinning, and the edulcoration of filtering includes coarse filtration and smart filtration, and coarse filtration goes on through screw rod filter screen 22, and smart filtration goes on through die head filter screen 22, need in time inspect screw rod filter screen 22 and die head filter screen 22 during production, ensures that the fuse-element can fully filter the edulcoration.
The implementation principle of the melt-blown fabric production process in the embodiment of the application is as follows:
adding a polymer raw material into a screw groove of a screw extruder through a charging port, driving the material to be conveyed forwards and continuously heating the material by the rotation of a screw, wherein the material is heated and melted, the material is changed into a high-elasticity state from a glass state, the material is changed into a viscous state due to plastic flow along with the further increase of the temperature, the melt in the viscous state is subjected to coarse filtration and impurity removal through a screw filter screen 22, and then the melt is conveyed to a melt pipeline through the propulsion of the screw; the melt is conveyed to a die head through a metering pump at a certain flow rate, fine filtration and impurity removal are carried out through a filter screen 22 of the die head, then spinning is carried out, formed superfine fibers are sprayed on the surface of a receiving roller 2 of a melt-blown web forming machine, the superfine fibers are uniformly coagulated into a web under the negative pressure adsorption action of the receiving roller 2, a formed melt-blown semi-finished product is rolled and spread by rollers of a first spreading roller 71 and a second spreading roller 72, and is formed into a homogeneous and traceless melt-blown fabric, and finally, electrostatic drafting and winding are carried out through a winding roller 172.
The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a melt even negative pressure drum-type lapper of melting equipment, includes frame (1), sets up in receiving cylinder (2) of frame (1) and is located winding mechanism (17) of frame (1) ejection of compact direction one end, its characterized in that: the machine frame (1) is provided with a first driving motor (6) and a second driving motor (175), the first driving motor (6) is used for driving the receiving roller (2) to operate, and the second driving motor (175) is used for driving the winding mechanism (17) to operate; the receiving roller (2) comprises an inner barrel (21) and a filter screen (22) welded on the outer layer of the inner barrel (21), a twill welding seam (221) is welded on the filter screen (22), the twill welding seam (221) is formed by spirally welding the outer wall of the inner barrel (21), a plurality of vent holes (211) are uniformly distributed on the barrel wall of the inner barrel (21), a negative pressure guide cylinder (3) is arranged inside the inner barrel (21) along the axial direction, and the negative pressure guide cylinder (3) is communicated with a negative pressure source (5).
2. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 1, wherein: negative pressure draft tube (3) and inner tube (21) coaxial setting, inner tube (21) both ends and fixed connection in frame (1) both sides are worn to establish at the both ends of negative pressure draft tube (3), inner tube (21) are rotated with the both ends of negative pressure draft tube (3) and are connected, a plurality of inlet vents (31) have been seted up along the axial to the roof of negative pressure draft tube (3), the both ends of negative pressure draft tube (3) all are provided with exhaust tube (4) with negative pressure draft tube (3) intercommunication, the tip that negative pressure draft tube (3) direction was kept away from in exhaust tube (4) communicates in negative pressure source (5) jointly.
3. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 2, characterized in that: a fluted disc (23) is arranged at one end of the receiving roller (2) close to the first driving motor (6), and a transmission gear (61) meshed with the fluted disc (23) is arranged at the shaft end of an output shaft of the first driving motor (6).
4. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 2, characterized in that: the below of receiving cylinder (2) is rotated and is provided with a pair of spreading roller set (7) parallel with receiving cylinder (2), spreading roller set (7) are including first spreading roller (71), second spreading roller (72), the one end of first spreading roller (71) is provided with and is used for driving first spreading roller (71) pivoted third driving motor (8), the one end of second spreading roller (72) is provided with and is used for driving second spreading roller (72) pivoted fourth driving motor (9).
5. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 4, wherein: a pair of first adjusting grooves (11) are respectively formed in the side wall, close to the two end portions of the first spreading roller (71), of the rack (1), the rack (1) is located on the outer side of the first adjusting grooves (11) and is provided with a first heightening mechanism (10) respectively, the first heightening mechanism (10) comprises a first support frame (101) and a first support block (102) connected to the first support frame (101) in a sliding mode, the end portion of the first spreading roller (71) is connected to the middle of the first support block (102) in a rotating mode through a bearing respectively, an installation plate (16) is arranged on the outer side wall of the first support block (102), a third driving motor (8) is fixedly connected to the installation plate (16), the output shaft of the third driving motor (8) is connected with one end of a roller shaft of the first spreading roller (71), and a top plate (13) is arranged at the top of the first support frame (101), an adjusting screw rod (14) is arranged between the top plate (13) and the top wall of the first supporting block (102), and the bottom end of the adjusting screw rod (14) is rotatably connected to the top wall of the first supporting block (102); a pair of second adjusting grooves (12) are respectively formed in the side wall, close to the direction of two end portions of the second spreading roller (72), of the rack (1), second height adjusting mechanisms are respectively arranged on the outer sides, located on the second adjusting grooves (12), of the rack (1), and the second height adjusting mechanisms are the same as the first height adjusting mechanisms (10).
6. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 5, wherein: and one ends of the adjusting screw rods (14) of the first heightening mechanism (10) and the second heightening mechanism, which are positioned above the top plate (13), are respectively provided with a fastening nut (15) for enhancing the connection stability of the adjusting screw rods (14) and the top plate (13).
7. The uniform negative pressure roller type web forming machine of the melt-blowing equipment as claimed in claim 1, wherein: winding mechanism (17) include support frame (171), rotate wind-up roll (172) of connecting in support frame (171) top, the below of wind-up roll (172) is provided with electrostatic generator (173), be provided with directly over parallel with electrostatic generator (173) the electrostatic emission stick (174) of being connected of electricity, electrostatic generator (173) electricity is connected with earth connection (18), earth connection (18) electricity is connected in ground connection tie point (19).
8. A melt-blown fabric production process is characterized in that: a process for making meltblown fabric using a uniform negative pressure cylinder former including the meltblowing apparatus of any one of claims 1-8, comprising the steps of:
s1, raw material feeding: putting the high-molecular master batch required for preparing the melt-blown fabric into a screw extruder for melting;
S2, melt metering: conveying the melt regularly and quantitatively by a metering pump;
s3, die spinning: conveying the melt to a die head through a metering pump, and drafting a polymer melt trickle extruded from a spinneret orifice of the die head by utilizing high-speed hot air;
s4, dividing and lapping: spraying the superfine fibers formed in the step S3 on the surface of a receiving roller (2) of a melt-blown web former, and uniformly and stably distributing the superfine fibers on the surface of the receiving roller (2) under the negative pressure adsorption action of the receiving roller (2) to preliminarily coagulate into a web;
s5, spreading and shaping: the receiving roller (2) drives the melt-blown semi-finished product of the primary coagulation net to pass through the first spreading roller (71) and the second spreading roller (72) for rolling and spreading, so that the melt-blown semi-finished product of the primary coagulation net is shaped into homogeneous and traceless melt-blown cloth;
s6, drafting and winding: and (3) performing electrostatic drafting winding on the melt-blown fabric formed in the step (S5) through a winding roller (172).
9. The process according to claim 8, wherein the melt-blown cloth is produced by a method comprising the following steps: the melt formed in the step S1 needs to be filtered to remove impurities before the melt is spun by a die head in the step S3.
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| CN113430718A (en) * | 2021-06-08 | 2021-09-24 | 湖州创塑新材科技有限公司 | A cylinder receives lapper for melt-blown non-woven fabrics production |
| CN114960038A (en) * | 2022-06-08 | 2022-08-30 | 湖州创塑新材科技有限公司 | Melt and spout even negative pressure drum-type lapper of equipment with melting for cloth production |
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| CN111850836B (en) | 2022-03-29 |
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