CN212834158U

CN212834158U - Melt and spout subassembly

Info

Publication number: CN212834158U
Application number: CN202021040017.7U
Authority: CN
Inventors: 吴书家; 汤永政; 孙家庆; 陈猛; 傅金慧
Original assignee: Pujiang Degong Precision Machinery Co ltd
Current assignee: Pujiang Degong Precision Machinery Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-03-30
Anticipated expiration: 2030-06-09

Abstract

The utility model relates to a melt-blown assembly, which comprises a jet plate, two wind shields and two side shields, wherein the bottom surface of the jet plate is provided with two inclined planes, the bottoms of the inclined planes are intersected, the jet plate is provided with a spinneret orifice and two groups of air inlets, the discharge end of the spinneret orifice is positioned at the intersection of the two inclined planes, and the air inlets are positioned at the front side and the rear side of the spinneret orifice; the two wind shields are symmetrically fixed on the front side and the rear side of two inclined planes below the spray plate respectively, two gas cavities which are symmetrical front and back are arranged among the wind shields, the bottom surface of the spray plate and the inclined planes, the air inlet holes are communicated with the corresponding gas cavities respectively, air outlet channels are arranged between one side of the wind shields close to the inclined planes and the corresponding inclined planes respectively, and the air outlet channels are communicated with the gas cavities respectively; the two side baffles are respectively fixed at the left side and the right side of the spray plate and the wind shield, and the side surfaces of the side baffles are in close contact with the side surfaces of the spray plate and the wind shield. The utility model relates to a melt and spout subassembly equipment convenience, drilling simple process, the stable just speed of hot gas flow, the fibre intensity of production is high.

Description

Melt and spout subassembly

Technical Field

The utility model relates to a non-woven fabrics production technical field especially relates to a melt-blown subassembly.

Background

The melt-blowing process includes melting polymer mother grains in an extruder at 240 deg.c, passing the melt through a metering pump to melt, measuring the flow rate of the melt output to a nozzle, forming the nozzle with one row of capillary tubes with interval of less than 1mm and diameter of 0.2-0.4 mm, setting air inlet holes in two sides of the capillary tubes, feeding 250-300 deg.c compressed air, extruding the polymer from the spinning nozzle, leading the head end of the compressed air to the polymer, drawing hot filament to diameter of 1-10 micron in air flow higher than sound speed (550m/s), mixing the hot air with peripheral air to cool the fiber and to solidify into fine and high strength fiber. The main process flow of the melt-blowing method is as follows: melt preparation, filtration, metering, melt extrusion, melt trickle drawing and cooling, and web formation.

The conventional meltblown structure includes one or more liquid nozzles (orifices) for ejecting heated molten resin and one or more hot gas nozzles for ejecting hot gas flow of the molten resin from the liquid nozzles to extend in a fiber form, the hot gas nozzles being close to the liquid nozzles, and the blowing direction of the hot gas nozzles and the ejecting direction of the liquid nozzles being arranged at an intersection below the meltblown filaments, and an apparatus for producing ultrafine fibers.

Conventional meltblowing suffers from the following drawbacks: a spinneret hole and a hot gas nozzle need to be drilled in melt blowing, wherein the hot gas nozzle needs to be arranged in a crossed mode with the spinneret hole, the hot gas nozzle needs to be drilled in an inclined mode, and the difficulty of drilling is high; the melt-blown method is characterized in that the strength of fibers is increased by utilizing the stretching effect of wind power, so that the stability and the wind pressure of hot air flow are important factors influencing the quality of melt-blown cloth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a melt and spout subassembly to the technical problem that the melt and spout subassembly drilling degree of difficulty is big among the prior art, the temperature nature of hot gas flow is difficult to control, hot gas flow atmospheric pressure improves with high costs etc.

In order to achieve the purpose, the utility model provides a technical scheme does:

the utility model relates to a melt-blown assembly, which comprises a jet plate, two wind shields and two side shields; the top surface of the jet plate is provided with a feed chute, the bottom surface of the jet plate is provided with two inclined planes which protrude out of the bottom surface of the jet plate, the bottoms of the two inclined planes are intersected, the jet plate is provided with a spinneret orifice and two groups of air inlet holes, the feed end of the spinneret orifice is communicated with the feed chute, the discharge end is positioned at the intersection of the two inclined planes, and the two groups of air inlet holes are respectively positioned at the front side and the rear side of the spinneret orifice; the two wind shields are symmetrically fixed on the front side and the rear side of two inclined planes below the spray plate respectively, the top surfaces of the wind shields are in seamless contact with the bottom surface of the spray plate, two symmetrical gas cavities are arranged between the two wind shields, the bottom surface of the spray plate and the two inclined planes, the two groups of air inlet holes are communicated with the corresponding gas cavities respectively, two air outlet channels are arranged between one side of the two wind shields close to the inclined planes and the corresponding inclined planes respectively, and the air outlet channels are communicated with the corresponding gas cavities respectively; the two side baffles are respectively fixed at the left side and the right side of the spray plate and the wind shield, and the side surfaces of the side baffles are in close contact with the side surfaces of the spray plate and the wind shield.

Preferably, a distribution plate is arranged above the feed chute, a plurality of distribution holes are formed in the distribution plate, and the distribution plate is in threaded connection with the spray plate. The distributor plate helps to make the feed of the raw material more uniform while also serving a filtering function.

Preferably, the included angles between the two inclined planes and the bottom surface of the spray plate are the same.

Preferably, the included angles between the two inclined planes and the bottom surface of the spray plate are both 120 degrees.

Preferably, the side surfaces of the two wind shields close to the inclined surfaces are parallel to the corresponding inclined surfaces respectively, and the widths of the two air outlet channels are the same, so that the air pressures of hot air flows on the two sides are the same when the filaments are discharged from the spinneret holes.

Preferably, two gas cavity in all be equipped with the buffer board, the buffer board adopts the integral type structure with the deep bead, the top of buffer board and the bottom surface contactless of spouting the board, the fresh air inlet be located the buffer board and keep away from one side on inclined plane.

Preferably, the wind deflector is fixed to the bottom surface of the jet plate by bolts.

Preferably, the front edge and the rear edge of the bottom surface of the spray plate are provided with baffles, and the wind shield is fixed with the baffles through bolts.

Preferably, the side baffle is fixed with the jet plate or/and the wind shield through bolts.

Preferably, the spray plate and the wind shield are respectively provided with a plurality of through holes which are corresponding up and down and used for assembling the melt-blown component on the melt-blown device.

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

1. the utility model discloses be equipped with spinneret orifice and two sets of fresh air inlets on spouting the board, two deep beads, spout two gas cavities of symmetry around being equipped with between board bottom surface and two inclined planes, two deep beads are close to and are equipped with two air outlet channel between one side on inclined plane and the inclined plane that corresponds respectively, the hot gas flow enters into gas cavity from the fresh air inlet, blow off from air outlet channel again, gas cavity and air outlet channel all form through the equipment of spouting board and deep bead in this structure, whole melt-blown subassembly is except boring indispensable screw, only need bore spinneret orifice and fresh air inlet on spouting the board, and spinneret orifice and two sets of fresh air inlets advance to be vertical hole, it is more convenient to drill, and the structure is more reasonable.

2. The utility model discloses set up the buffer board in gas cavity department, the buffer board is contactless with the bottom surface that spouts the board, and the end of giving vent to anger of fresh air inlet is just keeping away from one side on inclined plane to the buffer board. The hot air flow can rotate when entering the air cavity from the air inlet hole, the buffer plate plays a role in buffering, the rotation of the hot air flow is reduced, the output hot air flow is more stable, meanwhile, the hot air flow passes through a narrow gap between the buffer plate and the bottom surface of the spray plate, the air pressure of the hot air flow can be increased according to the narrow tube effect, the output speed of the hot air flow is increased, the drafting strength is further increased, and the produced fibers are thinner and have higher strength.

Drawings

FIG. 1 is a top view of a meltblowing assembly;

FIG. 2 is a bottom view of the meltblown assembly;

FIG. 3 is a cross-sectional view A-A of the meltblowing assembly of FIG. 2;

FIG. 4 is a B-B cross-sectional view of the meltblown assembly depicted in FIG. 2;

FIG. 5 is a top view of the nozzle plate;

FIG. 6 is a bottom view of the nozzle plate;

FIG. 7 is a side view of the nozzle plate;

FIG. 8 is a top view of the distributor plate;

FIG. 9 is a bottom view of the windshield;

FIG. 10 is a side view of the windshield;

fig. 11 is a side view of a side dam.

Description of the drawings: 1-spraying plate, 11-feeding groove, 12-baffle, 13-inclined plane, 14-spraying hole, 15-air inlet hole, 2-wind shield, 21-air cavity, 22-buffer plate, 23-air outlet channel, 3-side baffle, 4-distributing plate, 41-distributing hole and 5-through hole.

Detailed Description

For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.

Referring to the attached drawings 1-4, the utility model relates to a melt-blown assembly comprises a jet plate 1, two wind shields 2 and a side shield 3. Referring to the attached drawings 3-7, a feeding groove 11 is arranged on the top surface of the spray plate 1, baffles 12 are arranged at the front edge and the rear edge of the bottom surface of the spray plate 1, two inclined planes 13 protruding out of the bottom surface of the spray plate 1 are arranged on the bottom surface of the spray plate 1, the bottoms of the two inclined planes 13 are intersected, the intersection line of the two inclined planes 13 is parallel to the central axis of the spray plate 1 along the length direction and is positioned right below the central axis, the included angles of the two inclined planes 13 and the bottom surface of the spray plate 1 are the same, the included angles of the two inclined planes 13 and the bottom surface of the spray plate 1 are both 120 degrees, namely the included angle between the two inclined planes 13 is 60 degrees, and; the spinneret plate 1 is provided with a spinneret orifice 14 and two groups of air inlet holes 15, the spinneret orifice 14 is a capillary tube with the diameter of 0.3mm, the feeding end of the spinneret orifice 14 is communicated with the feeding groove 11, the discharging end of the spinneret orifice 14 is positioned at the intersection of the two inclined planes 13, the air inlet holes 15 are vertical holes, the aperture of each air inlet hole 15 is the same, the aperture of the air inlet hole 15 is 4mm, the two groups of air inlet holes 15 are respectively positioned at the front side and the rear side of the spinneret orifice 14, and the two groups of air inlet holes 15 are symmetrically arranged in the front and the rear direction by taking the central line of the length direction of the spinneret.

Referring to the attached

drawings

1, 3 and 4, a distribution plate 4 is arranged above the feeding groove, referring to the attached drawing 8, a plurality of distribution holes 41 are arranged on the distribution plate, the distribution plate 4 is in threaded connection with the spraying plate 1, and the distribution plate 4 is used for enabling raw materials to be fed more uniformly and filtering the raw materials.

Referring to the attached drawings 2-4, the two wind shields 2 are symmetrically fixed on the front and back sides of two inclined planes 13 below the jet plate 1 respectively, the top surfaces of the wind shields 2 are in seamless contact with the bottom surface of the jet plate 1, two symmetrical gas cavities 21 are arranged between the bottom surfaces of the two wind shields 2 and the jet plate 1 and between the two inclined planes 13, two groups of air inlet holes 15 are communicated with the corresponding gas cavities 21 respectively, two air outlet channels 23 are arranged between one side of each wind shield 2 close to the inclined plane 13 and the corresponding inclined plane 13 respectively, one side of each wind shield 2 close to the inclined plane 13 is parallel to the corresponding inclined plane 13, the width of each air outlet channel 23 is the same, so that the wind blowing from two sides of the jet orifice 14 is ensured to be the same, and the air outlet channels 23 are communicated with the corresponding.

Referring to the attached

drawings

3, 4, 9 and 10, the two gas cavities 21 are both provided with a buffer plate 22, the buffer plate 22 and the wind shield 2 adopt an integrated structure, the top of the buffer plate 22 is not contacted with the bottom surface of the jet plate 1, the air inlet 15 is positioned at one side of the buffer plate 22 far away from the inclined surface 13, the thickness of the buffer plate 22 is 2mm, the total thickness of the wind shield 2 is 25.5mm, the distance between the top end of the buffer plate 22 and the bottom surface of the wind shield 2 is 23.8mm, the wind shield 2 is fixed with the bottom surface of the jet plate 1 through bolts and is also fixed with the baffle 12 through bolts, after the wind shield 2 is assembled, the buffer plate 22 is not contacted with the bottom surface of the jet plate 1, a narrow gap exists between the two, the size of the gap is 1.7mm, the air outlet end of the air inlet 15 is over against one side of the buffer plate 22 far away from the inclined surface 13, during the jet process, hot air enters the position of, the buffer plate 22 plays a role of buffering, counteracts the power of hot air flow rotation, and makes the hot air flow finally output from the air outlet channel 23 more stable, and simultaneously, according to the narrow tube effect, after the hot air flow passes through the narrow gap between the buffer plate 22 and the bottom surface of the spray plate 1 from the gas cavity 21 with larger space, the air pressure is increased, the air speed is improved, and under the condition that the fan power is the same, the hot air flow with larger air speed can be output, and the strength of the fiber is further improved.

Referring to fig. 1 and 2, the two side baffles 3 are respectively fixed at the left and right sides of the jet plate 1 and the wind shield 2, and the side surfaces of the side baffles 3 are in close contact with the side surfaces of the jet plate 1 and the wind shield 2 to prevent hot air in the air cavity 21 from leaking from the left and right sides of the jet plate 1 and the wind shield 2; referring to fig. 11, an upper group of screw holes and a lower group of screw holes are formed in the side baffle 3, and the side baffle 3 is fixed on the left side and the right side of the spray plate 1 and the wind shield 2 through bolts and the spray plate 1 and the wind shield 2.

Referring to fig. 4, the jet plate 1 and the wind shield 2 are respectively provided with a plurality of through holes 5 which are vertically corresponding and used for assembling the melt-blown module on the melt-blown device, and after the assembly of the jet module is completed, the die assembly is fixed on the melt-blown device through screws.

The utility model relates to an assembly mode of melt-blown assembly is: firstly, fixing two wind shields 2 with the bottom surfaces of the jet plates 1 respectively through bolts, and further fixing the baffle 12 and the wind shields 2 through bolts, so that the wind shields 2 cannot move up and down, back, left and right; then connecting the side baffle 3 with the jet plate 1 and the wind shield 2 by using bolts; the distributor plate 4 is then placed in the feed chute 11; and finally, installing the melt-blown assembly on a melt-blown device through bolts to produce melt-blown cloth. In summary, the melt-blown assembly is easy to assemble.

The utility model relates to a melt and spout the theory of operation of subassembly is: the raw materials enter the feeding groove 11 after being filtered, and the distribution plate 4 above the feeding groove 11 distributes the raw materials, so that the raw materials in the feeding groove 11 are distributed more uniformly; the raw materials are extruded from the spinneret orifice 14 after passing through the distribution plate 4 and the feeding groove 11, meanwhile, the fan is connected with the air inlet 15, the fan outputs hot air, the hot air enters the air cavity 21 after passing through the air inlet 15, and further outputs stable hot air with supersonic speed through the air outlet channel 23 after passing through the buffering action of the buffer plate 22 and the accelerating action of the gap between the buffer plate 22 and the lower surface of the spray plate 1, the hot air pulls the hot filaments to the diameter of 1-10 mu m, and simultaneously the hot air is mixed with surrounding air when flowing downwards, so that the fibers are cooled and finally solidified into thinner fibers with higher strength.

The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A meltblown assembly, characterized by: the device comprises a spray plate, two wind shields and two side shields; the top surface of the jet plate is provided with a feed chute, the bottom surface of the jet plate is provided with two inclined planes which protrude out of the bottom surface of the jet plate, the bottoms of the two inclined planes are intersected, the jet plate is provided with a spinneret orifice and two groups of air inlet holes, the feed end of the spinneret orifice is communicated with the feed chute, the discharge end is positioned at the intersection of the two inclined planes, and the two groups of air inlet holes are respectively positioned at the front side and the rear side of the spinneret orifice; the two wind shields are symmetrically fixed on the front side and the rear side of two inclined planes below the spray plate respectively, the top surfaces of the wind shields are in seamless contact with the bottom surface of the spray plate, two symmetrical gas cavities are arranged between the two wind shields, the bottom surface of the spray plate and the two inclined planes, the two groups of air inlet holes are communicated with the corresponding gas cavities respectively, two air outlet channels are arranged between one side of the two wind shields close to the inclined planes and the corresponding inclined planes respectively, and the air outlet channels are communicated with the corresponding gas cavities respectively; the two side baffles are respectively fixed at the left side and the right side of the spray plate and the wind shield, and the side surfaces of the side baffles are in close contact with the side surfaces of the spray plate and the wind shield.

2. The melt blown assembly of claim 1 wherein: and a distribution plate is arranged above the feed chute, a plurality of distribution holes are arranged on the distribution plate, and the distribution plate is in threaded connection with the spray plate.

3. The melt blown assembly of claim 1 wherein: the included angles between the two inclined planes and the bottom surface of the spray plate are the same.

4. The melt blown assembly of claim 1 wherein: the included angles between the two inclined planes and the bottom surface of the spray plate are both 120 degrees.

5. The melt blown assembly of claim 1 wherein: the side surfaces of the two wind shields close to one side of the inclined surface are respectively parallel to the corresponding inclined surfaces, and the width of the two air outlet channels is the same.

6. The melt blown assembly of claim 1 wherein: the two gas cavities are internally provided with buffer plates, the buffer plates and the wind shield are of an integrated structure, the tops of the buffer plates are not in contact with the bottom surface of the spraying plate, and the air inlet hole is located in one side, away from the inclined plane, of the buffer plates.

7. The melt blown assembly of claim 1 wherein: the wind shield is fixed with the bottom surface of the spray plate through bolts.

8. The meltblowing assembly of claim 7, wherein: the front edge and the rear edge of the bottom surface of the spray plate are respectively provided with a baffle plate, and the wind shield is fixed with the baffle plates through bolts.

9. The melt blown assembly of claim 1 wherein: the side baffle is fixed with the jet plate or/and the wind shield through bolts.

10. The melt blown assembly of claim 1 wherein: the spray plate and the wind shield are respectively provided with a plurality of through holes which are corresponding up and down and are used for assembling the melt-blown components on the melt-blown device.