CN111519261A

CN111519261A - Melt-blowing die head, nozzle plate and nozzle plate die

Info

Publication number: CN111519261A
Application number: CN202010370708.1A
Authority: CN
Inventors: 周浪; 缪龙
Original assignee: Suzhou Yu'anjun Precision Technology Co ltd
Current assignee: Suzhou Yu'anjun Precision Technology Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-08-11

Abstract

The invention relates to a nozzle plate, which comprises a shell, a first channel formed on the shell and a plurality of spinneret orifices formed on the shell and communicated with the first channel, wherein a main body in a meltblown die head for preparing meltblown fabric and the nozzle plate with the spinneret orifices are separately prepared, so that the mass production of the nozzle plate is realized through powder metallurgy, the width of the meltblown die head can be flexibly changed, the die matching precision of the nozzle plate is high, the spinneret orifices are good in injection molding, free of defects, the dimensional tolerance and the appearance requirement of a finished product can even reach or exceed the requirement, the volume production of the product is stable, and the yield of the product is high.

Description

Melt-blowing die head, nozzle plate and nozzle plate die

Technical Field

The invention relates to a melt-blowing die head, a nozzle plate and a nozzle plate die.

Background

In the melt-blowing equipment, a melt-blowing die head is one of core components for realizing high polymer wire-drawing forming, and the design and the precision of the melt-blowing die head directly influence the aspects of the length, the uniformity, the toughness, the fineness and the like of wire drawing, thereby having decisive influence on the quality of final melt-blown cloth. The most core spinneret orifices in the melt-blowing die head are very difficult to produce, the processing time needs several months, the yield cannot be greatly improved in a short time, and the production capacity is very limited. The existing production mode of the melt-blown die head is integrally processed, and the spinneret orifices are prepared in a fine hole discharge mode or a numerical control processing mode, so that the integral method has the advantages of long time consumption, large processing amount, high product reject ratio and incapability of meeting the requirement of product precision, and the problems of uneven roughness of the surfaces in the orifices and the like are easily caused in the preparation process.

Disclosure of Invention

The invention aims to provide a nozzle plate which is prepared separately from a melt-blowing die head and is provided with a spinneret orifice.

In order to achieve the purpose, the invention provides the following technical scheme: a nozzle plate includes a housing, a first passage formed in the housing, and a plurality of orifices formed in the housing and arranged to communicate with the first passage.

Furthermore, the spinneret orifices are arranged at equal intervals along the transverse length direction of the first channel.

Further, the size of the spinneret orifice is 0.2 mm.

Further, the nozzle plate further includes a first docking member to fixedly dispose the housing on a docking target.

Further, the cross section of the shell is triangular or the end part of the shell is pointed.

The invention also provides a melt-blowing die head for preparing melt-blown cloth, which comprises a die head body, a second channel formed on the die head body and at least one nozzle plate fixed on the die head body, wherein the first channel and the second channel are communicated.

Further, the melt-blowing die head further comprises a mounting part connected with the die head body, and the second channel is formed on the mounting part; the mounting portion is provided with a second docking member to which the nozzle plate is fixed.

Further, the mounting portion is integrally formed with the die head body.

Furthermore, the die head main body is also provided with a plurality of air holes on two sides of the mounting part, and the air holes are used for ejecting high-temperature air flow to stretch the target object ejected from the spinneret orifices.

The invention also provides a nozzle plate die for forming the nozzle plate, which comprises:

the fixed die assembly comprises a fixed die base plate and a fixed die plate fixedly connected with the fixed die base plate, wherein a positioning ring penetrating through the fixed die base plate is arranged at the central position of the fixed die base plate, a pouring gate corresponding to the central position of the positioning ring and a fixed die groove part sunken from one side of the fixed die plate to the inside of the fixed die plate are arranged on the fixed die plate, the fixed die assembly also comprises a fixed die core accommodated in the fixed die groove part, and the fixed die core is fixed in the fixed die plate;

the movable die assembly comprises a movable die base plate, cushion blocks correspondingly and vertically arranged on two sides of the movable die base plate, and a movable die plate fixedly connected with the movable die base plate and the cushion blocks, wherein the two cushion blocks, the movable die base plate and the movable die plate jointly enclose an accommodating space, the movable die plate is provided with a movable die groove portion recessed towards the interior of the movable die plate from one side of the movable die plate, the movable die assembly further comprises an ejection unit accommodated in the accommodating space and a movable die core accommodated in the movable die groove portion;

the guide component comprises a guide post fixed on the fixed die base plate and a guide sleeve sleeved on the guide post,

the fixed die core and the movable die core are arranged in two numbers, the nozzle plate comprises a first butt joint piece used for fixing the shell on a butt joint object, a plurality of convex columns used for forming the first butt joint piece are formed on the fixed die core, a plurality of plates used for forming the first channel are formed on the movable die core, and the nozzle plate die further comprises a plurality of rod bodies used for forming the spinneret orifice and positioned between the movable die cores.

The invention has the beneficial effects that: the main body in the melt-blowing die head for preparing the melt-blown fabric and the nozzle plate with the spinneret orifices are separately prepared, so that the mass production of the nozzle plate is realized through powder metallurgy, the width of the melt-blowing die head can be flexibly changed, the die matching precision of the nozzle plate is high, the injection molding of the spinneret orifices is good, no defect is caused, the dimensional tolerance and the appearance requirement of finished products even reach or exceed the drawing requirement, the product volume production is stable, and the product yield is high.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

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

FIG. 2 is a schematic view of the nozzle plate shown in FIG. 1 in another orientation;

FIG. 3 is a schematic structural view of a meltblowing die according to one embodiment of the invention;

FIG. 4 is a schematic view of a portion of the structure of the meltblowing die illustrated in FIG. 3;

FIG. 5 is a schematic overall view of a mold for preparing a nozzle plate according to an embodiment of the present invention;

FIG. 6 is a first perspective view of the nozzle plate mold shown in FIG. 5;

FIG. 7 is a second perspective view of the nozzle plate mold shown in FIG. 5;

FIG. 8 is a third schematic perspective view of the nozzle plate mold shown in FIG. 5;

FIG. 9 is a schematic perspective view of one of the cavity inserts shown in FIG. 5;

FIG. 10 is an exploded view of the cavity plate, core plate, nozzle plate and rod of FIG. 5;

fig. 11 is an exploded view of the core, nozzle plate, and rod of fig. 5 in another direction.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 and 2, a nozzle plate 5 according to an embodiment of the present invention includes a housing 51, a first channel 52 formed on the housing 51, and a plurality of orifices 53 formed on the housing 51 and communicating with the first channel 52. The nozzle plate 5 is of a triangular prism-like structure, the cross section of the shell 51 is triangular or the shell 51 is pointed at the end with the spinneret orifice 53, the shapes of other positions are not particularly limited, and the design is beneficial to the subsequent preparation of melt-blown cloth. The nozzle plate 5 includes a first side 511, a second side 512, and a third side 513 which are adjacently disposed and extend in the lateral direction of the nozzle plate 5, wherein the spinneret holes 53 are provided at positions where the first side 511 and the second side 512 meet. The first channel 52 extends in the longitudinal direction of the nozzle plate 5 and crosses the nozzle plate 5, and the first channel 52 passes through the third side 513 at one end of the nozzle plate 5 and approaches the intersection of the first side 511 and the second side 512 at the other end, and the cross section of the housing 51 is shaped like a U. The plurality of spinneret holes 53 are arranged at equal intervals along the transverse length direction of the first channel 52, the size of each spinneret hole 53 is 0.2mm, the specific number of the spinneret holes 53 and the distance between adjacent spinneret holes 53 are not particularly limited, and the spinneret holes can be arranged according to actual needs. Indeed, in other embodiments, the size of the spinneret holes may be other values, and is not particularly limited herein. Here, the lateral direction of the nozzle plate 5 is a in fig. 1, and the longitudinal direction of the nozzle plate 5 is b in fig. 2.

The nozzle plate 5 also includes a first docking member 54 for fixedly positioning the housing 51 on a docking target, which, in this embodiment, the first butt-joint part 54 is a plurality of first round holes which are arranged between the first side surface 511 and the third side surface 513 and penetrate through the first side surface 511 and the third side surface 513, and are arranged between the second side surface 512 and the third side surface 513 and penetrate through the second side surface 512 and the third side surface 513, wherein one part of the plurality of first round holes are equidistantly arranged on the first side surface 511 along the transverse direction, the other part of the plurality of first round holes are equidistantly arranged on the second side surface 512 along the transverse direction, wherein the number of the first round holes on the first side surface 511 is 4, the number of the first round holes on the second side surface 512 is 5, and the first round hole on the first side 511 and the first round hole on the second side 512 are arranged in a staggered manner in the transverse direction, which is favorable for reducing the size of the nozzle plate 5 as much as possible. The specific number and arrangement mode of the first round holes are not specifically limited, and the first round holes can be arranged according to actual needs.

Referring to fig. 3 and 4, the present invention further provides a meltblown die for preparing meltblown fabric, which comprises a die body 6, a second channel 7 formed on the die body 6, at least one nozzle plate 5 fixed on the die body 6, and a mounting portion 8 connected to the die body 6. In this embodiment, the mounting portion 8 and the die head body 6 are integrally formed, and the nozzle plate 5 is fixed to the die head body 6 through the mounting portion 8, but in other embodiments, the mounting portion and the die head body may be separately formed, and no specific limitation is made herein. Wherein the mounting portion 8 is also formed with a second passage 7, i.e., the second passage 7 is formed in the die main body 6 and the mounting portion 8 and extends in the transverse direction of the die main body 6 and the mounting portion 8, and the first passage 52 and the second passage 7 are provided in communication when the nozzle plate 5 is fixed to the mounting portion 8. The mounting portion 8 is provided with a second docking member 81 for fixing the nozzle plate 5 thereon, wherein the second docking member 81 is engaged with the first docking member 54, in this embodiment, the second docking member 81 is a plurality of second circular holes, the second circular holes are engaged with the first circular holes one by one, and the first circular holes and the second circular holes are fixed by additional screws 9, so as to fix the nozzle plate 5 on the mounting portion 8. In this embodiment, the number of nozzle plates 5 installed is 4, but not limited thereto, the number of the spinneret holes 53 in the meltblown die head can be flexibly set according to actual production needs to form the length of the meltblown die head, the installation is convenient and flexible, the nozzle plates 5 with the spinneret holes 53 in the meltblown die head are separately prepared, the mass production of the nozzle plates 5 can be realized, and the width of the meltblown fabric can be flexibly changed.

The die head body 6 is further provided with a plurality of air holes 61 at both sides of the mounting portion 8, the air holes 61 are used for ejecting high-temperature air flow to stretch the target object ejected from the spinneret holes 53, and the number of the air holes 61 can be set according to actual requirements.

The invention also provides a die for forming the nozzle plate 5, wherein the nozzle plate 5 prepared by adopting the powder metallurgy process is made of 420 stainless steel.

As shown in fig. 5 to 8, the nozzle plate mold comprises a fixed mold component 1, a movable mold component 2, a fixed component 3 and a guide component 4, wherein the fixed mold component 1 is opposite to the movable mold component 2 for matching and molding the nozzle plate 5, and the guide component 4 is used for guiding the relative positions of the movable mold component 2 and the fixed mold component 1, so that deviation is not generated to ensure the quality of the nozzle plate 5. When the nozzle plate die is used for preparing products, the fixed die assembly 1 and the movable die assembly 2 are fixed through the fixing assembly 3, so that the fixed die assembly 1 and the movable die assembly 2 are mutually closed, and the precision of the nozzle plate 5 is guaranteed. And when this nozzle plate mould need put in storage, can fix cover half subassembly 1 and movable mould subassembly 2 through fixed subassembly 3 for both are closed each other, can avoid the inside original part of nozzle plate mould to receive the damage when guaranteeing nozzle plate 5's assembly accuracy.

Specifically, the fixed mold assembly 1 comprises a fixed mold base plate 10 and a fixed mold plate 11 which is positioned below the fixed mold base plate 10 and is fixedly connected with the fixed mold base plate 10. The central position of the fixed mold base plate 10 is provided with a positioning ring 12 penetrating through the fixed mold base plate 10, the fixed mold plate 11 is provided with a sprue 13 corresponding to the central position of the positioning ring 12 and a fixed mold groove portion (not shown) recessed from one side of the fixed mold plate 11 to the inside of the fixed mold plate 11, the positioning ring 12 corresponds to a gun platform position on the injection molding machine and is used for guiding the gun platform to enable the injection molding machine to accurately inject rubber materials into the nozzle plate mold, and the sprue 13 is used for guiding the injection molding rubber materials to enter the nozzle plate mold. The fixed die assembly 1 further comprises a fixed die core 14 accommodated in the groove part of the fixed die, and the fixed die core 14 is fixed in the fixed die plate 11.

The movable mold assembly 2 comprises a movable mold base plate 20, cushion blocks 21 vertically arranged on two sides of the movable mold base plate 20 correspondingly, and a movable mold plate 22 fixedly connected with the movable mold base plate 20 and the cushion blocks 21, wherein the two cushion blocks 21, the movable mold base plate 20 and the movable mold plate 22 jointly enclose to form an accommodating space. The movable mold assembly 2 further comprises 2 support rods 23 accommodated in the accommodating space and fixed on the movable mold base plate 20, and the support rods 23 are used for supporting the movable mold plate 22 and preventing the movable mold plate 22 from deforming. The movable die plate 22 is a movable die recessed portion (not shown) recessed from the movable die plate 22 side toward the inside of the movable die plate 22. The moving die assembly 2 further comprises an ejection unit accommodated in the accommodating space and a moving die core 24 accommodated in the groove portion of the moving die, the moving die base plate 20, the cushion block 21 and the moving die plate 22 are sequentially arranged from bottom to top, and the fixed die base plate 10 and the fixed die plate 11 are sequentially arranged from top to bottom, so that the fixed die assembly 1 and the moving die assembly 2 can be relatively matched.

The ejection unit includes an ejector pin push plate 25 disposed near the movable mold base plate 20, a push plate fixing plate 26 fixedly connected to the ejector pin push plate 25, and an ejector pin 27 penetrating the push plate fixing plate 26 and disposed toward the fixed mold assembly 1. The injection molding machine is provided with a mandril (not shown), the movable mold base plate 20 is provided with a mandril through hole (not shown) matched with the mandril, and the mandril passes through the mandril through hole and is abutted against the thimble push plate 25, so that when the injection molding machine pushes the mandril, the mandril is pushed and sequentially pushes the thimble push plate 25 and the push plate fixing plate 26 to move along the movement direction of the mandril. The ejector plate retainer plate 26 and the ejector plate 25 also together define one end of the ejector pin 27 so that the ejector pin 27 can be pushed by the ejector pin to move toward the fixed mold assembly 1. The ejector pins 27 are engaged with the injection-molded nozzle plate 5, and the nozzle plate 5 can be ejected from the insert 24 after the nozzle plate mold is opened. The ejection unit further comprises an orientation assembly 29 penetrating through the ejector pin push plate 25 and the push plate fixing plate 26, and the orientation assembly 29 comprises an orientation column 291 and an orientation sleeve 292 arranged in the ejector pin push plate 25 and the push plate fixing plate 26. The number of the directional columns 291 is 2, and the directional columns 291 are distributed on two sides of the movable mold base plate 20 relatively, one end of each directional column 291 is clamped in the movable mold base plate 20, and the other end of each directional column 291 can freely extend into the movable mold plate 22. When the ejector pins are pushed and in turn push the ejector pin push plate 25 and the push plate fixing plate 26 to move together along the moving direction of the ejector pins, the orientation component 29 fixes the ejector pin push plate 252 and the push plate fixing plate 26 to move simultaneously.

The ejecting unit further comprises a reset unit 28, the reset unit 28 comprises a reset rod 281 and springs 282 sleeved on the reset rod 281, the number of the reset rod 281 and the number of the springs 282 are set to be 4, and the springs are uniformly distributed on 4 corners of the push plate fixing plate 26. One end of the reset rod 281 is limited between the push plate fixing plate 26 and the thimble push plate 25, the other end of the reset rod can freely penetrate through the movable template 22 and abut against the fixed template 11, and the reset rod is arranged around the thimble 27, so that the reset rod 281 can guide the push plate fixing plate 26, the thimble push plate 25 and the thimble 27, and the thimble 27 is prevented from moving obliquely and being damaged. When the ejector pin 27 pushes the product, the reset rod can assist in pushing the fixed die plate 11. One part of the spring 282 extends into the movable die plate 22 to limit its position relative to the movable die plate 22, and the other part is disposed to protrude from the movable die plate 22, and the protruding part abuts against the push plate fixing plate 26. When the nozzle plate mold is opened, the ejector pins 27 are pushed out by ejector pins of the injection molding machine, the product is taken out, the ejector pins retract, the ejector units are reset by the elastic force of the springs 282, and the nozzle plate mold is closed. However, when the spring 282 fails or the reset fails due to an external reason, the nozzle plate mold is clamped, and the reset rod 281 can directly abut against the fixed mold plate 11, so that the ejector pins 27 are prevented from being directly acted by the clamping force, and the ejector pins 27 are protected from being damaged.

Referring to fig. 9 to 11, the number of the core blocks 14 and the core blocks 24 is two, and the two core blocks 14 and the two core blocks 24 cooperate to form a molding cavity (not shown) for molding the nozzle plate 5. Both the two cavity blocks 14 have a side surface 141 at the molding cavity position for molding the first side surface 511 and the second side surface 512, and the side surface 141 is formed with a plurality of protruding columns 142 for molding the first connecting piece 54, in this embodiment, the first connecting piece 54 is 4 first circular holes located on the

first side surface

511 and 5 first circular holes located on the second side surface 512, so that one of the cavity blocks 14 is formed with 4 protruding columns 142, and the other cavity block 14 is formed with 5 protruding columns 142. The specific number and configuration of posts 142 is designed based on the actual configuration, location, and number of first docking member 54 required.

The two movable mold cores 24 are respectively formed with a plate 241 for forming the first channel 52, specifically, each plate 241 is formed by vertically extending from a surface of one movable mold core 24, the surface is a surface where the two movable mold cores 24 are attached to each other, and the two plates 241 are attached to each other and together form the first channel 52. The nozzle plate mold further includes a plurality of rod bodies 001 located between the two movable mold cores 24 for forming the nozzle holes 53, specifically, the plurality of rod bodies 001 are located between the two plates 241 and extend along the transverse direction of the plates 241 and are arranged at equal intervals, a plurality of first grooves 242 capable of accommodating the rod bodies 001 are formed at corresponding positions on the two plates 241, when the two plates 241 are butted, the rod bodies 001 are located in a plurality of spaces formed at corresponding positions of the plurality of first grooves 242, so as to form the nozzle holes 53 located on the nozzle plate 5. One end of each of the rods 001 protrudes out of the plate 241 and extends to the two cavity blocks 14, the two cavity blocks 14 are further provided with a plurality of second grooves 143 above the respective side surfaces 141 for accommodating the rods 001, when the surfaces of the two cavity blocks 143 are attached to each other, the second grooves 143 of the two cavity blocks 143 at the same position form a cylindrical groove (not shown) capable of accommodating one rod 001, and one cylindrical groove corresponds to one rod 001. The mass production of the nozzle plates 5 can be easily realized through the die, the matching precision of the die is high, particularly, the injection molding of the spinneret orifices 53 which are difficult to prepare is good and free of defects, the dimensional tolerance and the appearance requirement of finished products even reach or exceed the requirements of drawings, and the mass production of the products is stable.

In the present invention, when the barrel of the injection molding machine injects the material into the cavity through the gate 13, the nozzle plate 5 may be molded, and then the ejection unit ejects the nozzle plate 5, thereby completing the entire injection molding process.

Referring to fig. 8, the guiding assembly 4 includes a guiding post 41 and a guiding sleeve 42 covering the guiding post. The guide pillars 41 are arranged to be 4, are uniformly distributed at 4 corners of the fixed die base plate 10, and are limited between the fixed die base plate 10 and the injection molding machine. One end of the guide post 41 is engaged with the fixed mold base plate 10, and the other end thereof is freely inserted into the pad 21. The fixed die assembly 1 and the movable die assembly 2 are both provided with guide sleeves 42, and the guide sleeves 42 are correspondingly matched with the guide columns 41 and are uniformly distributed on 4 corners of the fixed die plate 11 and the movable die plate 22. When the nozzle plate mould is opened, the guide post 41 is separated from the guide sleeve 42 in the movable mould plate 22, the movable mould component 2 is far away from the fixed mould component 1, when the nozzle plate mould is closed, the guide post 41 penetrates the guide sleeve 42 in the movable mould plate 22, and the movable mould component 2 and the fixed mould component 1 form a cavity for forming the lock cylinder connecting piece.

Referring to fig. 5 and 6, the fixing assembly 3 includes a fixing strip 31, fixing holes are formed at both ends of the fixing strip 31, and a screw 32 or a bolt 32 fixes the fixing strip 31 to the fixed die plate 11 and the movable die plate 22 through the two fixing holes, so that the relative position of the fixed die assembly 1 and the movable die assembly 2 is maintained.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A nozzle plate comprising a housing, a first passageway formed in the housing, and a plurality of orifices formed in the housing and arranged in communication with the first passageway.

2. The nozzle plate of claim 1, wherein a plurality of the orifices are arranged equidistantly along the lateral length of the first channel.

3. The nozzle plate of claim 1, wherein the size of the orifice is 0.2 mm.

4. The nozzle plate of claim 1, further comprising a first docking member to fixedly position the housing on a docking target.

5. The nozzle plate of claim 1, wherein the cross-section of the housing is triangular or the end of the housing is pointed.

6. A meltblown die for producing a meltblown fabric, comprising a die body, a second passageway formed in the die body, and at least one nozzle plate according to any one of claims 1 to 5 secured to the die body, the first passageway and the second passageway being arranged in communication.

7. The meltblowing die of claim 6, further comprising a mounting portion coupled to the die body, the second passageway being formed in the mounting portion; the mounting portion is provided with a second docking member to which the nozzle plate is fixed.

8. The meltblowing die of claim 7, wherein the mounting portion is integrally formed with the die body.

9. The meltblowing die of claim 7, wherein the die body further comprises a plurality of orifices on each side of the mounting portion, the orifices being configured to emit a high temperature gas stream to stretch the target from the orifices.

10. A nozzle plate die for forming a nozzle plate as claimed in any one of claims 1 to 5, comprising:

the nozzle plate die is characterized in that the number of the fixed die cores and the number of the movable die cores are two, the nozzle plate comprises a first butt joint piece used for fixedly arranging the shell on a butt joint target, a plurality of convex columns used for forming the first butt joint piece are formed on the two fixed die cores, a plate used for forming the first channel is formed on the two movable die cores, and the nozzle plate die further comprises a plurality of rod bodies used for forming the spinneret orifice and positioned between the two movable die cores.