CN111593419A

CN111593419A - Nozzle mechanism and melt-blown fabric mould

Info

Publication number: CN111593419A
Application number: CN202010568686.XA
Authority: CN
Inventors: 高国利; 段志平; 黄铁平; 贾宇霖; 吕伟; 杨尧; 尹覃伟
Original assignee: Shenzhen Silver Basis Technology Co Ltd
Current assignee: Shenzhen Silver Basis Technology Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-08-28

Abstract

The application provides a nozzle mechanism and a melt-blown fabric die, wherein the nozzle mechanism comprises a nozzle plate and two air knives, the nozzle plate is provided with a spinneret orifice, the two air knives are connected with the nozzle plate, each air knife and the nozzle plate jointly define an air jet channel, the spinneret orifice is positioned between the two air jet channels, and one sides of the two air jet channels are converged to form a mixing channel communicated with the spinneret orifice; each air knife is provided with an outer wall corresponding to the outlet side of the mixing channel, convex parts are arranged on the outer wall, a steady flow area is formed between the two convex parts, and at least part of the outlet side is located in the steady flow area. The air flow interference is reduced, the uniformity of material distribution is improved, and the forming quality is improved.

Description

Nozzle mechanism and melt-blown fabric mould

Technical Field

The invention relates to the field of mold manufacturing, in particular to a spray head mechanism and a melt-blown fabric mold.

Background

The main material of the melt-blown cloth is polypropylene (PP), which has good filterability, shielding property, heat insulation property and oil absorption property. The fabric can be applied to medical and sanitary fabrics, such as operating gowns, protective clothing, disinfection wrapping cloth, masks, diapers and the like, has outstanding performance in industry, and can be used as filter materials, insulating materials, cement packaging bags, geotextiles, wrapping cloth and the like. The melt-blown non-woven fabric is produced with high melt index material (PP grain) and through heating and pressurizing in screw extruder into molten state, the molten material is extruded in the mold to the spinneret hole in the front end of the nozzle, and the extruded material is thinned through drawing with two converging high speed and high temperature air flows, sprayed to the fabric connecting machine in certain height, cooled and solidified to form melt-blown non-woven fabric.

Researches show that the existing melt-blown fabric die has the following defects:

the processing efficiency of the processing die of the melt-blown non-woven fabric is low.

Disclosure of Invention

The invention aims to provide a nozzle mechanism and a melt-blown fabric mold, which can improve the processing efficiency.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present invention provides a nozzle mechanism, which includes:

the jet nozzle comprises a jet head plate and two air knives, wherein the jet head plate is provided with a spinneret orifice, the two air knives are connected with the jet head plate, each air knife and the jet head plate define an air jet channel together, the spinneret orifice is positioned between the two air jet channels, and one sides of the two air jet channels are converged to form a mixing channel communicated with the spinneret orifice; each air knife is provided with an outer wall corresponding to the outlet side of the mixing channel, convex parts are arranged on the outer wall, a steady flow area is formed between the two convex parts, and at least part of the outlet side is located in the steady flow area.

In an alternative embodiment, the protrusions extend in the direction of extension of the mixing channel, and the length of the protrusions is not less than the length of the mixing channel, such that the outlet sides are both located in the calming zone.

In an alternative embodiment, the nozzle plate is provided with two first guide inclined planes, and the spinneret orifices are positioned on one side of the two first guide inclined planes which are close to each other; every air knife all is equipped with the second guide inclined plane, and two second guide inclined planes and two first guide inclined planes one-to-one and interval are arranged to inject air duct and mixing channel jointly.

In an alternative embodiment, the side of the two protrusions that are close to each other is a leading side, and the leading side and the outer side have a first included angle.

In an alternative embodiment, the first included angle ranges from 130 ° to 140 °.

In an alternative embodiment, the first guiding slope has a second angle with the outer side, and the first angle is equal to the second angle.

In an alternative embodiment, the spinning nozzle comprises a plurality of spinning orifices arranged at intervals along the extension of the outlet side.

In an optional embodiment, the nozzle plate is further provided with a cavity, the cavity is provided with an equal-width section and a variable-width section, the variable-width section is communicated with the equal-width section, the width of the variable-width section is gradually reduced from one side close to the equal-width section to the other side, and one side of the variable-width section, which is far away from the equal-width section, is communicated with the spinneret orifice.

In an optional embodiment, the air knife is provided with an air conveying channel and a connector, the connector is communicated with the air conveying channel, the connector is used for being externally connected with air conveying equipment, and the air conveying channel is communicated with the air jetting channel.

In a second aspect, an embodiment of the present invention provides a meltblown die, including:

the spray head mechanism of any of the preceding embodiments.

The embodiment of the invention has the beneficial effects that:

in summary, the embodiment provides a melt-blown fabric mold, in the working process, after the raw material is heated and pressurized into a molten state by a screw extruder, the raw material is injected into the mold, flows in the mold and reaches a spinneret on a spinneret plate, and when the raw material is extruded from the spinneret, high-pressure and high-temperature air is sprayed into two air spraying channels, the raw material and the air are collected at a mixing channel, the raw material is stretched by two convergent high-speed and high-temperature air flows to be refined, and the refined raw material is sprayed onto a web curtain fabric connecting device through a certain height, and the refined fiber is cooled and solidified to form melt-blown fabric. Because the outer wall of the air knife corresponding to the outlet side of the mixing channel is provided with the convex parts, the stable flow area is formed between the two convex parts, at least part of the outlet side is positioned in the stable flow area, when the raw materials are sprayed, the airflow in the stable flow area is stable, the airflow outside the stable flow area is not easy to enter the stable flow area, and the raw materials in the stable flow area are not easy to be interfered by the external airflow, so that the raw materials can quickly reach the net curtain cloth connecting machine, the time for forming the melt-blown cloth on the net curtain cloth connecting machine is shortened, and the processing efficiency is improved. And the raw materials are little disturbed by external air flow when being sprayed out, the raw materials reaching the net curtain cloth connecting machine are more uniformly distributed, and the quality of the melt-blown cloth is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a head mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the enlarged structure at A in FIG. 1;

fig. 3 is a schematic structural view of a showerhead plate according to an embodiment of the present invention;

FIG. 4 is a partial enlarged structural view at B in FIG. 3;

fig. 5 is a schematic structural diagram of an air knife according to an embodiment of the present invention.

Icon:

100-a showerhead plate; 110-a main body panel portion; 120-a conical portion; 121-a first guiding ramp; 130-a spinneret; 131-spinneret holes; 140-a chamber; 141-equal width section; 142-a width-variable section; 150-feed inlet; 200-air knife; 201-lateral surface; 202-proximal side; 203-medial side; 204-distal side; 210-a convex part; 211-a leading side; 220-an air conveying passage; 230-a linker; 300-an air channel; 400-a mixing channel; 410-an outlet side; 500-Steady flow region.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the operation process of the melt-blown fabric mold, when the material is sprayed out from the nozzle on the fabric connecting machine, the material cannot be uniformly covered on the fabric connecting machine, thereby influencing the forming quality of the melt-blown fabric product. In the research process, designers find that the air flow around the nozzle is unstable, and the air flow interferes with the material sprayed out of the nozzle, so that the condition of uneven material spraying is caused.

Referring to fig. 1 to 5, in view of this, the embodiment provides a melt-blown fabric mold, which improves the structure of the melt-blown fabric mold to improve the uneven ejection of the material, improve the molding quality of the product, and improve the processing efficiency.

Referring to fig. 1 and 2, in the present embodiment, the meltblown fabric die includes a nozzle plate 100 and two air knives 200, the nozzle plate 100 is provided with a spinneret 130, the two air knives 200 are both connected to the nozzle plate 100, each air knife 200 and the nozzle plate 100 define an air channel 300 together, the spinneret 130 is located between the two air channels 300, and one sides of the two air channels 300 converge to form a mixing channel 400 communicated with the spinneret 130; each air knife 200 has an outer wall corresponding to the outlet side 410 of the mixing channel 400, the outer wall having protrusions 210 thereon, the two protrusions 210 defining a flow stabilization zone 500 therebetween, at least a portion of the outlet side 410 being located in the flow stabilization zone 500.

The melt-blown fabric mould that this embodiment provided, in the course of the work, the raw materials heats the pressurization through screw extruder and becomes the molten state after, pour into the mould, flow in the mould and reach spinneret 130 department on shower nozzle board 100, when being extruded from spinneret 130, spout into high pressure high temperature air in two air jet channels 300, raw materials and air are converged in mixing channel 400 department, the raw materials makes it refine through the drawing of two bundles of high speed, high temperature air currents of convergence, through a take the altitude, spout on the net curtain connects the cloth machine, the fibre that refines cools off solidification and forms the melt-blown fabric. Because the convex parts 210 are arranged on the outer wall of the air knife 200 corresponding to the outlet side 410 of the mixing channel 400, the flow stabilizing area 500 is formed between the two convex parts 210, at least part of the outlet side 410 is positioned in the flow stabilizing area 500, when raw materials are sprayed, airflow in the flow stabilizing area 500 is stable, airflow outside the flow stabilizing area 500 is not easy to enter the flow stabilizing area 500, the raw materials in the flow stabilizing area 500 are not easy to be interfered by external airflow, the raw materials can rapidly arrive on the net curtain cloth connecting machine, the time for forming the melt-blown cloth on the net curtain cloth connecting machine is shortened, and the processing efficiency is improved. And the raw materials are little disturbed by external air flow when being sprayed out, the raw materials reaching the net curtain cloth connecting machine are more uniformly distributed, and the quality of the melt-blown cloth is improved.

Referring to fig. 3 and 4, in the present embodiment, optionally, the showerhead plate 100 includes a main plate portion 110 and a tapered portion 120, the main plate portion 110 may be a rectangular parallelepiped, and the tapered portion 120 is a trapezoidal cone. The tapered portion 120 is disposed on a longitudinal side of the main body panel portion 110, a lower bottom of the tapered portion 120 is connected to the main body panel portion 110, the tapered portion 120 extends along a longitudinal direction of the main body panel portion 110, two opposite inclined surfaces of the tapered portion 120 are first guiding inclined surfaces 121, and a distance between the two first guiding inclined surfaces 121 gradually decreases from a side close to the main body panel portion 110 to a side away from the main body panel portion 110.

Further, the tapered portion 120 is located at a widthwise middle position of the main body plate portion 110.

In this embodiment, optionally, the main plate portion 110 and the tapered portion 120 are integrally formed, so that the structure is compact, the processing and the manufacturing are convenient, the strength is high, and the service life is long.

Optionally, a feed opening 150 is provided on a side of the main plate portion 110 facing away from the tapered portion 120, and the spinneret 130 is provided on an upper bottom of the tapered portion 120, that is, on a side of the tapered portion 120 facing away from the main plate portion 110. A cavity 140 for material flowing is arranged between the feed inlet 150 and the spinning nozzle 130, and the feed inlet 150 and the spinning nozzle 130 are both communicated with the barrel cavity; it should be noted that the cavity 140 extends from the main plate 110 to the tapered portion 120.

Referring to fig. 2, the cavity 140 is further provided with an equal-width section 141 and a variable-width section 142, the variable-width section 142 is communicated with the equal-width section 141, the width of the variable-width section 142 gradually decreases from one side close to the equal-width section 141 to the other side, one side of the variable-width section 142 away from the equal-width section 141 is communicated with the spinneret 130, and the equal-width section 141 is communicated with the feed inlet 150.

Referring to FIG. 4, further, spinneret 130 includes a plurality of spinneret holes 131, and spinneret holes 131 can be, but are not limited to, cylindrical holes. The plurality of spinning holes 131 are arranged at regular intervals along the extending direction of the spinning grooves. The plurality of orifices 131 are each in communication with a side of the widened section 142 of the pocket 140 remote from the equal-width section 141.

In other words, after entering the chamber 140, the material inputted from the feeding inlet 150 flows from the equal-width section 141 of the chamber 140 into the widening section 142, then enters the spinneret hole 131 from the widening section 142, and finally is sprayed out from the spinneret hole 131.

Referring to fig. 5 in combination with fig. 1, in the present embodiment, optionally, each air knife 200 is in a strip shape, an outer peripheral surface of each air knife 200 includes an outer side 201, a proximal side 202, an inner side 203, and a distal side 204, which are connected in sequence, the proximal side 202 and the distal side 204 are arranged oppositely and in parallel, and the distal side 204 is an outer side of the air duct. The medial side 203 is beveled, i.e., the medial side 203 is at an obtuse angle with the proximal side 202 or at an acute angle with the distal side 204. The angle may be set as needed, and is not particularly limited in this embodiment. In addition, the inner side surface 203 may be referred to as a second guide ramp that cooperates with the first guide ramp 121 with a gap therebetween to define the air channel 300. And the inner side surface 203 is sealed with the showerhead plate 100 on both sides of the extending direction of the inner side surface 203, thereby preventing the air flow from leaking from both sides of the extending direction of the inner side surface 203.

Meanwhile, the distal side surface 204 is provided with a convex portion 210, the convex portion 210 is strip-shaped, and the convex portion 210 extends along the intersecting line direction of the inner side surface 203 and the distal side surface 204, that is, the extending direction of the convex portion 210 is the length direction of the air knife 200. Optionally, the length of the protrusions 210 is no less than the length of the spinning orifice 130, thereby enabling the outlet sides 410 of the mixing channels 400 to each be located in the flow stabilization zone 500 defined by two protrusions 210.

Optionally, a side of the protrusion 210 away from the distal side 204 is parallel to the distal side 204, a side of the protrusion 210 close to the inner side 203 is a leading side 211, the leading side 211 is a slope, the leading side 211 and the distal side 204 have a first included angle α, and the first included angle α ranges from 130 ° to 140 °, for example, the first included angle α is 130 °, 135 °, or 140 °.

Correspondingly, the first guiding slope 121 and the distal side 204 have a second included angle β, which is in the range of 130 ° -140 °, for example, the first included angle α is 130 °, 135 °, 140 °, or the like. Alternatively, the first included angle α and the second included angle β may be designed to be equal, so as to enhance the stability of the airflow in the flow stabilizing region 500.

Further, the air knife 200 is provided with an air duct 220 and a joint 230, one end of the air duct 220 is located on the outer side surface 201, and the other end is located on the proximal side surface 202 and is communicated with the air duct 300. The joint 230 is disposed on the outer side surface 201 and is communicated with the gas transmission channel 220, and the joint 230 is used for connecting high-temperature and high-pressure gas.

In the showerhead mechanism provided in this embodiment, the two air knives 200 are all connected to the showerhead plate 100, and during assembly, the two air knives 200 are respectively connected to the main body plate 110 and located at both sides of the tapered portion 120, and when the air knives 200 are connected to the main body plate 110, the proximal side surfaces 202 of the air knives 200 are attached to the length plate surface of the main body plate 110 and are hermetically connected, and the width of the air duct 300 gradually decreases from the proximal side surfaces 202 to the distal side surfaces 204. A flow stabilizing area 500 is defined between the two convex portions 210, the mixing channels 400 are located in the flow stabilizing area 500, that is, the mixed materials sprayed out of the mixing channels 400 are located in the protection range of the flow stabilizing area 500, so that the materials sprayed on the cloth splicing machine are distributed more uniformly, and the forming quality of products is high.

It should be noted that the air knife 200 and the main board 110 can be fixedly connected by screws, and it is obvious that in other embodiments, the air knife 200 and the main board 110 can be fixedly connected by other manners.

The nozzle mechanism provided by the embodiment has the advantages that the interference of surrounding air flow is small when the materials are sprayed out from the outlet side 410 of the mixing channel 400, the materials sprayed on the cloth receiving machine are uniformly distributed, and the forming quality of products is high.

The embodiment also provides a melt-blown fabric mould, which comprises the spray head mechanism of the embodiment, and the melt-blown fabric mould is reasonable in design, high in quality of processed products and high in processing efficiency.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spray head mechanism, comprising:

the jet nozzle comprises a jet head plate and two air knives, wherein the jet head plate is provided with a jet nozzle, the two air knives are connected with the jet head plate, each air knife and the jet head plate jointly define an air jet channel, the jet nozzle is positioned between the two air jet channels, and one sides of the two air jet channels are converged to form a mixing channel communicated with the jet nozzle; each air knife is provided with an outer wall corresponding to the outlet side of the mixing channel, convex parts are arranged on the outer wall, a steady flow area is formed between the two convex parts, and at least part of the outlet side is located in the steady flow area.

2. The spray head mechanism of claim 1, wherein:

the convex part extends along the extending direction of the mixing channel, and the length of the convex part is not less than that of the mixing channel, so that the outlet sides are all positioned in the stable flow area.

3. The spray head mechanism of claim 1, wherein:

the spinneret plate is provided with two first guide inclined planes, and the spinneret orifice is positioned at one side of the two first guide inclined planes, which are close to each other; each air knife is provided with a second guide inclined plane, and the two second guide inclined planes are in one-to-one correspondence with the two first guide inclined planes and are arranged at intervals so as to jointly limit the air jet channel and the mixing channel.

4. The spray head mechanism of claim 3, wherein:

two one side that the convex part is close to each other is the guide side, the guide side with the outside has first contained angle.

5. The spray head mechanism of claim 4, wherein:

the first included angle ranges from 130 degrees to 140 degrees.

6. The spray head mechanism of claim 4, wherein:

the first guide inclined plane and the outer side are provided with a second included angle, and the first included angle is equal to the second included angle.

7. The spray head mechanism of claim 1, wherein:

the spinneret orifice comprises a plurality of spinneret orifices which are arranged at intervals along the extension direction of the outlet side.

8. The spray head mechanism of claim 1, wherein:

the spinneret plate is characterized in that the spinneret plate is further provided with a containing cavity, the containing cavity is provided with an equal-width section and a variable-width section, the variable-width section is communicated with the equal-width section, the width of the variable-width section is gradually reduced from one side close to the equal-width section to the other side, and one side, far away from the equal-width section, of the variable-width section is communicated with the spinneret orifice.

9. The spray head mechanism of claim 1, wherein:

the air knife is provided with an air conveying channel and a joint, the joint is communicated with the air conveying channel, the joint is used for being externally connected with air conveying equipment, and the air conveying channel is communicated with the air jetting channel.

10. The melt-blown fabric die, characterized in that the melt-blown fabric die comprises:

the spray head mechanism of any one of claims 1 to 9.