阅读说明：本技术 一种熔喷设备均匀负压滚筒式成网机及熔喷布生产工艺 (Uniform negative pressure drum-type web former of melt-blowing equipment and melt-blown fabric production process ) 是由 李喆一 于 2020-07-11 设计创作，主要内容包括：本申请涉及熔喷布生产技术领域,旨在提供一种熔喷设备均匀负压滚筒式成网机及熔喷布生产工艺,其技术方案要点是：包括机架、设于机架的接收滚筒和位于机架出料方向一端的收卷机构,机架设有第一驱动电机和第二驱动电机,第一驱动电机用于驱动接收滚筒运转,第二驱动电机用于驱动收卷机构运转；接收滚筒包括内筒、设于内筒外层的滤网,内筒的筒壁均布有若干通气孔,内筒内部沿轴向设置有负压导流筒,负压导流筒连通有负压源；接收滚筒的下方转动设置有一对与接收滚筒平行的铺展辊组；无痕式熔喷布生产的工艺,包括步骤：原料投入、熔体计量、模头纺丝、分丝铺网、铺展定型、牵伸收卷。本发明具有熔喷成网均匀、布料均质无痕的优点。(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.)

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.

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.

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.