CN212316389U - Easy-to-maintain melt-blowing die - Google Patents
Easy-to-maintain melt-blowing die Download PDFInfo
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- CN212316389U CN212316389U CN202020623965.7U CN202020623965U CN212316389U CN 212316389 U CN212316389 U CN 212316389U CN 202020623965 U CN202020623965 U CN 202020623965U CN 212316389 U CN212316389 U CN 212316389U
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- 238000007664 blowing Methods 0.000 title description 6
- 238000002347 injection Methods 0.000 claims abstract description 87
- 239000007924 injection Substances 0.000 claims abstract description 87
- 238000001125 extrusion Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 10
- 239000002861 polymer material Substances 0.000 description 8
- 229920001169 thermoplastic Polymers 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Landscapes
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The utility model provides a melt-blown mould easy to maintain, which comprises a mould body, a spraying block, a first air plate and a second air plate, wherein a buckle cavity and a material extrusion cavity communicated with a buckle groove are formed in the mould body; the injection block is buckled in the buckle cavity, the injection block and the end part of the die body form a V-shaped injection structure, and a plurality of injection holes communicated with the material extrusion cavity are formed in the injection block; the first air plate is assembled on the first side of the injection structure, a first high-pressure air channel is formed between the first air plate and the side wall of the first side of the injection structure, and a top air outlet of the first high-pressure air channel faces to a top outlet of the injection hole; the second air plate is assembled on the second side of the injection structure, a second high-pressure air channel is formed between the second air plate and the side wall of the second side of the injection structure, and a top air outlet of the second high-pressure air channel faces to a top outlet of the injection hole. The invention can realize the quick cleaning and dredging of the jet hole, thereby remarkably improving the maintenance efficiency of the melt-blown die.
Description
Technical Field
The utility model relates to a non-woven fabrics production field especially relates to an easy to maintain's melt-blown mould.
Background
The formation of nonwoven webs by meltblowing dies is well known in the art. A material extrusion chamber is formed in the meltblowing die and molten thermoplastic polymer material is forced into the extrusion chamber and extruded through an orifice in the end of the extrusion chamber to form a strand or filament. The filaments or filaments are heated by a high-speed hot air stream and blown onto a condensing surface such as a drum, thereby forming a nonwoven fabric of randomly dispersed meltblown fibers.
The traditional melt-blown die generally comprises a V-shaped die body and a pair of air plates assembled on two sides of the die body, wherein a material extrusion cavity is formed in the die body, and a row of injection holes communicated with the extrusion cavity are formed at the top end of the die body; a high-pressure air cavity is formed between each air plate and one side surface of the die body. After being extruded by the jet holes, the molten thermoplastic polymer material is heated by high-pressure air in two high-pressure air cavities at two sides and is carried by the high-pressure air to be sprayed onto a condensation surface so as to form the non-woven fabric of the randomly dispersed melt-blown fibers. In order to ensure the smoothness of the spray hole, residual materials in the spray hole need to be cleaned and dredged regularly. However, the injection holes are located in the die body, and the cleaning and dredging difficulty is high.
SUMMERY OF THE UTILITY MODEL
In order to realize the block quick cleaning and dredging of the jet hole and improve the maintenance efficiency of the melt-blown mould, the invention provides the melt-blown mould easy to maintain, and the technical scheme is as follows:
an easy to maintain meltblowing die comprising:
the die comprises a die body, a die body and a die core, wherein the die body comprises a bottom and an end part protruding out of the bottom, a buckle cavity is formed in the end part, and a material extrusion cavity communicated with the buckle cavity is formed in the bottom;
the injection block is buckled in the buckling cavity, the injection block and the end part form a V-shaped injection structure, and a plurality of injection holes which penetrate through the injection block and are communicated with the material extrusion cavity are formed in the injection block;
the first air plate is assembled on the first side of the injection structure, a mounting gap is reserved between the first air plate and the side wall of the first side of the injection structure to form a first high-pressure air channel, and a top air outlet of the first high-pressure air channel faces to a top outlet of the injection hole; and
and the second air plate is assembled on a second side, opposite to the first side, of the injection structure, a mounting gap is reserved between the second air plate and a second side wall of the injection structure to form a second high-pressure air channel, and a top air outlet of the second high-pressure air channel faces to a top outlet of the injection hole.
In some embodiments, the injection block is a split structure, the injection block includes a first injection block and a second injection block which are symmetrically arranged and attached to each other, a plurality of first half holes are formed on an inner wall of the first injection block, a plurality of second half holes corresponding to the first half holes one to one are formed on an inner wall of the second injection block, and each of the first half holes and the corresponding second half hole surround to form one injection hole.
In some embodiments, the mold body is a split structure, the injection block includes a first mold block and a second mold block which are symmetrically arranged, a first buckling groove and a first extrusion groove are formed on an inner wall of the first mold block, a second buckling groove and a second extrusion groove are formed on an inner wall of the second mold block, the first buckling groove and the second buckling groove surround to form the buckling cavity, and the first extrusion groove and the second extrusion groove surround to form the material extrusion cavity.
In some embodiments, the first air plate and the second air plate are bolted to the mold body via bolts, respectively.
In some embodiments, air inlet holes are formed in the mold body and are communicated with the first high-pressure air channel and the second high-pressure air channel.
In some embodiments, the meltblowing die further comprises a base and a connecting block, wherein: the connecting block is detachably connected to the base, and the die body is detachably connected to the connecting block; a feeding channel is formed on the base, and a material distribution cavity communicated with the feeding channel and the material extrusion cavity is formed on the connecting block.
In some embodiments, the die body is bolted to the connecting block.
In some embodiments, the connection block is bolted to the base.
In some embodiments, a filter plate is assembled in the feed channel, the filter plate is densely provided with filter holes, and at least one surface of the filter plate is covered with a filter screen.
In some embodiments, the distribution chamber is equipped with a distribution plate, and the distribution plate is uniformly provided with distribution holes.
Compared with the melt-blown die in the prior art, the melt-blown die comprises a die body and a jet block which is connected to the end part of the die body in a buckling mode, and jet holes are formed in the jet block. The injection block is detached from the die body, so that the injection holes in the injection block can be quickly cleaned and dredged, and the maintenance efficiency of the melt-blown die is remarkably improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are needed in the embodiments and are practical will be briefly described below and will be obvious, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Wherein,
FIG. 1 is a schematic cross-sectional view of a melt-blowing die according to the present invention;
fig. 2 is a schematic structural view of the die body in the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic structural view of the injection block in an assembled state according to the present invention;
FIG. 5 is an enlarged partial view of the area B of FIG. 4;
FIG. 6 is a cross-sectional view A-A of FIG. 4;
fig. 7 is a schematic structural view of the injection block in a disassembled state according to the present invention;
FIG. 8 is an enlarged partial view of the area B of FIG. 7;
FIG. 9 is a cross-sectional view A-A of FIG. 7;
fig. 10 is an assembly view of a first air plate and a second air plate of the present invention;
FIG. 11 is a cross-sectional view A-A of FIG. 10;
fig. 12 is a schematic structural diagram of a connecting block according to the present invention;
FIG. 13 is a cross-sectional view A-A of FIG. 12;
fig. 14 is a schematic structural view of a bottom plate according to the present invention;
FIG. 15 is a cross-sectional view A-A of FIG. 14;
FIG. 16 is a schematic view of the filter plate according to the present invention;
FIG. 17 is a cross-sectional view A-A of FIG. 16;
fig. 18 is a schematic structural view of a cloth plate of the present invention;
fig. 19 is a sectional view a-a of fig. 18.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the easy-to-maintain melt-blowing die of the present invention at least includes a die body 1, a spray plate 2, a first air plate 3 and a second air plate 4.
As shown in fig. 3, the mold body 1 includes a bottom and an end portion (a portion shown by a dashed line frame) protruding from the bottom, a fastening cavity 13 is formed on the end portion, and a material extruding cavity 5 communicating with the fastening cavity 13 is formed in the bottom.
The injection block 2 is buckled in the buckling cavity 13, the injection block 2 and the end part form a V-shaped injection structure, and a plurality of injection holes which penetrate through the injection block 2 and are communicated with the material extrusion cavity 5 are formed in the injection block 2.
The first air plate 3 is assembled on the first side of the injection structure, a mounting gap is reserved between the first air plate 3 and the side wall of the first side of the injection structure to form a first high-pressure air channel 6, and a top air outlet of the first high-pressure air channel 6 faces a top outlet of the injection hole.
The second air plate 4 is assembled on a second side of the injection structure opposite to the first side, and a mounting gap is reserved between the second air plate 4 and a second side wall of the injection structure to form a second high-pressure air channel 6 ', and a top air outlet of the second high-pressure air channel 6' faces a top outlet of the injection hole.
The working process of the melt-blown mould of the utility model is as follows:
the melted thermoplastic polymer material is pressed into the material extrusion cavity 5 by external extrusion equipment and extruded out through the injection holes in the injection block 2, and simultaneously, external high-pressure air is introduced into the first high-pressure air channel 6 and the second high-pressure air channel 6 'and finally is sprayed out through the top air outlets of the first high-pressure air channel 6 and the second high-pressure air channel 6'. The two high pressure air streams intersect at the tip exit of the orifice and create a high velocity air stream, and the thermoplastic polymer material extruded from the orifice is carried by the high velocity air stream and sprayed onto an outer condensing surface (e.g., the surface of a roll) to form a nonwoven web of randomly dispersed meltblown fibers.
In the present invention, the injection hole is formed in the injection block 2, and the injection block 2 is snap-fitted to the end of the die body 1. Will spray piece 2 and lift off from the tip of mould body 1, can realize dredging the washing fast of jet orifice, after the mediation washs, will spray piece 2 and adorn back to the tip of mould body 1 can.
In order to further reduce difficulty in dredging and cleaning the injection hole, the cleaning device is optional, and is shown in fig. 4 to 9. The spray block 2 is provided in a split structure including a first spray block 21 and a second spray block 22 which are symmetrically provided and attached to each other. Wherein: a plurality of first half holes 23a are formed on the inner wall of the first injection block 21, a plurality of second half holes 23b corresponding to the first half holes 23a one by one are formed on the inner wall of the second injection block 23, and a circular injection hole 23 is formed by surrounding each first half hole 23a and the corresponding second half hole 23 b. As shown in fig. 4 and 5, the injection holes 23 are arranged on the same axis,
so set up, to spray the piece 2 and unload the back from the tip of mould body 1, spray the piece 21 with the second with first injection piece 22 and separate, can expose completely first half hole 23a on the first injection piece 21 and the second half hole 23a on the second injection piece 22 to convenient, the residual material of the coagulation of adhesion on half hole inner wall of quick washing.
Furthermore, as known to those skilled in the art, the half-holes exposed to the surface of the workpiece are much less difficult to machine than the through-holes hidden inside the workpiece. Therefore, the utility model provides a processing degree of difficulty by the jet orifice that two half holes involution formed is far below the processing degree of difficulty of the jet orifice of traditional melt-blown mould, and its shaping precision is then far above the shaping precision of the jet orifice of traditional melt-blown mould.
Further, as known to those skilled in the art, the deeper the depth of the ejection hole of the meltblowing die in the axial direction thereof, the faster the ejection speed of the material ejected from the ejection hole, the better the quality of the nonwoven fabric formed. The conventional drilling process has a limited drilling depth, which limits the depth of the injection hole. And the utility model discloses a jet orifice is formed by two half holes involutory, and the depth of finish that exposes in half hole of workpiece surface is then unrestricted, thereby makes the utility model discloses a jet orifice's degree of depth reaches the target value.
Alternatively, as shown in fig. 2 to 3, the mold body 1 is also provided as a split structure including a first mold block 15 and a second mold block 12 which are symmetrically provided, wherein: a first clamping groove and a first extrusion groove are formed in sequence on the inner wall of the first mold block 15, a second clamping groove and a second extrusion groove are formed in sequence on the inner wall of the second mold block 12, the first clamping groove and the second clamping groove surround to form a clamping cavity 13, and the first extrusion groove and the second extrusion groove surround to form a material extrusion cavity 5.
Equally, set up mould body 1 into the subdivision formula structure, can conveniently maintain the washing of buckle chamber 13, material extrusion chamber 5 in the mould body 1 on the one hand, on the other hand can reduce the processing degree of difficulty in buckle chamber 13, material extrusion chamber 5 to promote the machining precision in buckle chamber 13, material extrusion chamber 5. In addition, the mold body 1 is provided with a split structure, so that the rapid installation and removal of the injection block 2 can be realized.
As shown in fig. 1 and 10 to 11, bolt holes are formed in the first air plate 3 and the second air plate 4, and the first air plate 3 and the second air plate 4 are bolted to the mold body 1 through bolts. The ejection block 2 and the mold body 1 can be exposed by removing the first air plate 3 and the second air plate 4.
Alternatively, in order to introduce high-pressure air into the first and second high-pressure air passages 6, 6 ', as shown in fig. 2, air inlet holes 14 communicating with the first and second high-pressure air passages 6, 6' are formed in the die body 1. High-pressure air output by an external high-pressure air supply device enters the first high-pressure air channel 6 and the second high-pressure air channel 6 'through the air inlet holes 14 and is finally sprayed out through the top air outlets of the first high-pressure air channel 6 and the second high-pressure air channel 6'.
As shown in fig. 1, the apertures of the first and second high-pressure air passages 6, 6' are preferably tapered from the ends thereof away from the top air outlet toward the top air outlet, so as to increase the ejection speed of the air ejected from the top air outlet.
As shown in fig. 1, fig. 12-fig. 15, optionally, the meltblowing die of the present invention further includes a base 8 and a connecting block 7, wherein: the connecting block 7 is bolted on the base 8 through a bolt hole, and the die body 1 is bolted on the connecting block 7 through a bolt. A feeding channel 9 is formed on the base 8, and a distributing cavity 71 communicated with the feeding channel 9 and the material extruding cavity 5 is formed on the connecting block 7. The molten thermoplastic polymer material is pressed into the material extrusion chamber 5 through the feed channel 9 and the distribution chamber 71 in sequence under the pressure of an external extrusion device, and is finally extruded through the injection holes on the injection block 2.
It can be seen that the main components of the melt-blowing die of the invention, namely the die body 1, the injection block 2, the first air plate 3, the second air plate 4, the connecting block 7 and the base 8, are detachably connected, which greatly facilitates the routine maintenance and repair operation of the melt-blowing die of the invention.
As shown in fig. 1, 16-17, the feeding channel 9 is optionally equipped with a filter plate 10, the filter plate 10 is densely provided with through holes, at least one surface of the filter plate 10 is covered with a filter screen, and when the molten thermoplastic polymer material passes through the filter plate 10, large solid particles in the molten thermoplastic polymer material are captured and never filtered.
As shown in fig. 1, 18-19, optionally, a distribution plate 11 is disposed in the distribution chamber 71, and distribution holes are uniformly disposed on the distribution plate 11, so that the molten thermoplastic polymer material can be uniformly distributed when passing through the distribution plate 11.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (10)
1. An easy to maintain meltblown die, comprising:
the die comprises a die body, a die body and a die core, wherein the die body comprises a bottom and an end part protruding out of the bottom, a buckle cavity is formed in the end part, and a material extrusion cavity communicated with the buckle cavity is formed in the bottom;
the injection block is buckled in the buckling cavity, the injection block and the end part form a V-shaped injection structure, and a plurality of injection holes which penetrate through the injection block and are communicated with the material extrusion cavity are formed in the injection block;
the first air plate is assembled on the first side of the injection structure, a mounting gap is reserved between the first air plate and the side wall of the first side of the injection structure to form a first high-pressure air channel, and a top air outlet of the first high-pressure air channel faces to a top outlet of the injection hole; and
and the second air plate is assembled on a second side, opposite to the first side, of the injection structure, a mounting gap is reserved between the second air plate and a second side wall of the injection structure to form a second high-pressure air channel, and a top air outlet of the second high-pressure air channel faces to a top outlet of the injection hole.
2. The meltblowing die of claim 1, wherein:
the injection piece is the subdivision formula structure, the first injection piece and the second injection piece that the injection piece set up and laminate each other including the symmetry, be formed with a plurality of first half holes on the inner wall of first injection piece, the second is formed with on the inner wall of second injection piece a plurality of with a plurality of first half hole one-to-one's second half hole, every first half hole and corresponding half hole of second surround and form one the jet orifice.
3. The meltblowing die of claim 1, wherein:
the mould body is of a split structure, the injection block comprises a first mould block and a second mould block which are symmetrically arranged, a first buckle groove and a first extrusion groove are formed in the inner wall of the first mould block, a second buckle groove and a second extrusion groove are formed in the inner wall of the second mould block, the first buckle groove and the second buckle groove surround to form the buckle cavity, and the first extrusion groove and the second extrusion groove surround to form the material extrusion cavity.
4. The meltblowing die of claim 1, wherein the first air plate and the second air plate are each bolted to the die body via bolts.
5. The meltblowing die of claim 1, wherein air intake holes are formed in the die body in communication with the first high-pressure air passage and the second high-pressure air passage.
6. The meltblowing die of claim 1, further comprising a base and a connecting block, wherein:
the connecting block is detachably connected to the base, and the die body is detachably connected to the connecting block;
a feeding channel is formed on the base, and a material distribution cavity communicated with the feeding channel and the material extrusion cavity is formed on the connecting block.
7. The meltblowing die of claim 6, wherein the die body is bolted to the connecting block.
8. The meltblowing die of claim 6, wherein the connecting block is bolted to the base.
9. The meltblowing die of claim 6, wherein a filter plate is mounted within the feed channel, the filter plate having filter holes densely distributed therein, the filter plate having a filter screen covered on at least one surface thereof.
10. The melt-blown die of claim 6, wherein the distribution chamber is provided with a distribution plate, and the distribution plate is provided with distribution holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020623965.7U CN212316389U (en) | 2020-04-23 | 2020-04-23 | Easy-to-maintain melt-blowing die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020623965.7U CN212316389U (en) | 2020-04-23 | 2020-04-23 | Easy-to-maintain melt-blowing die |
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| Publication Number | Publication Date |
|---|---|
| CN212316389U true CN212316389U (en) | 2021-01-08 |
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| CN202020623965.7U Active CN212316389U (en) | 2020-04-23 | 2020-04-23 | Easy-to-maintain melt-blowing die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394888A (en) * | 2020-04-23 | 2020-07-10 | 无锡市世标精密机械制造有限公司 | An easy-to-maintain meltblown mold |
-
2020
- 2020-04-23 CN CN202020623965.7U patent/CN212316389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394888A (en) * | 2020-04-23 | 2020-07-10 | 无锡市世标精密机械制造有限公司 | An easy-to-maintain meltblown mold |
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