CN214561494U - Hot-blast non-woven fabrics drilling equipment - Google Patents
Hot-blast non-woven fabrics drilling equipment Download PDFInfo
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- CN214561494U CN214561494U CN202022973714.4U CN202022973714U CN214561494U CN 214561494 U CN214561494 U CN 214561494U CN 202022973714 U CN202022973714 U CN 202022973714U CN 214561494 U CN214561494 U CN 214561494U
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- woven fabrics
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- needle
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 91
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 238000005485 electric heating Methods 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 4
- 238000004080 punching Methods 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 230000037303 wrinkles Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 206010021639 Incontinence Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The utility model discloses a hot-blast non-woven fabrics drilling equipment, including unreeling the roller, it is connected with first fixed bolster to unreel both ends rotation about the roller, the rear side of unreeling the roller is provided with first roll-over roller mechanism, the rear side of first roll-over roller mechanism is provided with the needle roller, both ends are rotated and are connected with the second fixed bolster about the needle roller, the downside of needle roller is provided with the meshing roller, the both sides and the second fixed bolster rotation of meshing roller are connected. The utility model discloses be provided with adjustment mechanism, during punching, because needle roller and meshing roller meshing, can carry out the straight line to the non-woven fabrics and pull to lead to near non-woven fabrics formation fold of syringe needle front side, can make the non-woven fabrics punch inhomogeneously, adjustment mechanism's adjusting roller external diameter is tangent can extrude the non-woven fabrics, shrink about the restriction non-woven fabrics, the position of rethread fixed slide rail and slide rail, about the regulation adjusting roller, adjust the tension of near non-woven fabrics of syringe needle, reduce the fold, it is even that the guarantee non-woven fabrics punches.
Description
Technical Field
The utility model relates to a non-woven fabrics processing equipment technical field specifically is a hot-blast non-woven fabrics drilling equipment.
Background
The hot-air non-woven fabric belongs to one of hot-air bonded (hot-rolled and hot-air) non-woven fabrics, the hot-air non-woven fabric is a non-woven fabric which is bonded by penetrating hot air on drying equipment through a fiber web after fibers are carded, and heating the fiber web, and the hot-air bonded product is widely applied to the manufacture of disposable products in a unique style along with the development of the market, such as fabrics of baby diapers, adult incontinence pads and feminine hygiene products, napkins, bath towels, disposable tablecloths and the like; the thick product is used for manufacturing cold protective clothing, bedding, baby sleeping bags, mattresses, sofa cushions and the like. The high-density hot-melt adhesive product can be used for manufacturing filter materials, sound insulation materials, shock absorption materials and the like.
Punching equipment is needed to be used to hot-blast non-woven fabrics when punching, and present hot-blast non-woven fabrics punching equipment is when punching, because the meshing is dragged, the non-woven fabrics near the syringe needle of needle roller can form the fold, can lead to subsequent non-woven fabrics to punch inhomogeneously, and we need a hot-blast non-woven fabrics punching equipment to solve this problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hot-blast non-woven fabrics drilling equipment is in order to solve the problem that proposes in the above-mentioned background art.
In order to solve the technical problem, the utility model provides a following technical scheme: a hot-air non-woven fabric punching device comprises an unwinding roller, wherein the left end and the right end of the unwinding roller are rotatably connected with a first fixed bracket, a first turning roller mechanism is arranged at the rear side of the unwinding roller, a needle roller is arranged at the rear side of the first turning roller mechanism, the left end and the right end of the needle roller are rotationally connected with a second fixed bracket, the lower side of the needle roller is provided with an engaging roller, the two sides of the meshing roller are rotationally connected with a second fixed bracket, the front surface of the second fixed bracket is fixedly connected with an adjusting mechanism, a second turning roller mechanism is arranged at the rear side of the second fixing bracket, an electric heating roller is fixedly connected at the inner side of the second turning roller mechanism, the rear side of the second turning roller mechanism is provided with a winding roller, the left side and the right side of the winding roller are rotatably connected with a third fixed support, and the front upper side of the third fixed support is fixedly connected with a positioning mechanism.
Further, first turn roller mechanism and second turn roller mechanism are including going up the roll, roll and support down, the downside that goes up the roll is provided with roll and roll the roller down, it all rotates with roll and roll the roller down about to go up to roll, and first turn roller mechanism and second turn roller mechanism play the effect of direction through last deflector roll and lower deflector roll, can make the driven in-process of hot-blast non-woven fabrics, keep certain tension, still have the effect of auxiliary motion in addition.
Further, the outside circumference of needle roller evenly is provided with the syringe needle, set up the needle groove with the syringe needle meshing on the outside circumference of meshing roller, the needle roller passes through the syringe needle with the meshing roller and meshes between the needle groove, can realize punching hot-blast non-woven fabrics in the rotation, and work efficiency is high, and it is more even to punch.
Further, the electric heat roller is including electric heating element board, last compression roller and lower electric heat roller, the downside of going up the compression roller is provided with down the electric heat roller, goes up the compression roller and is tangent with lower electric heat roller external diameter, the both ends of going up compression roller and lower electric heat roller are rotated and are connected with the electric heating element board, the support fixed connection of electric heating element board and second turn roller mechanism, hot-blast non-woven fabrics is after punching, because needle roller and meshing roller meshing punch, can slightly drag the non-woven fabrics, makes degum around the aperture, and lower electric heat roller can heat the non-woven fabrics, goes up the compression roller and extrudees, makes the non-woven fabrics aperture bond again around.
Furthermore, the adjusting mechanism comprises two fixed slide rails, a first slide block, two slide rails, a second slide block, a fixed plate and two adjusting rollers, the outer diameters of the two adjusting rollers are tangent, the left end and the right end of each adjusting roller are rotatably connected with the fixed plate, the outer side surface of each fixed plate is fixedly connected with the second slide block, one end of the outer side of each second slide block is slidably connected with the corresponding slide rail, the outer side surface of each slide rail is fixedly connected with the corresponding first slide block, the outer end of each first slide block is slidably connected with the corresponding fixed slide rail, the reverse side of each fixed slide rail is fixedly connected with the front side of the corresponding second fixed support, and when the hot-air non-woven fabric is punched, the needle rollers and the meshing rollers are meshed, the non-woven fabric can be linearly pulled, so that the non-woven fabric near the front side of the needle head forms wrinkles, the non-woven fabric can be punched unevenly, and the outer diameters of the adjusting rollers can extrude the non-woven fabric tangentially, shrink about restriction non-woven fabrics, the position of regulation roller is adjusted about rethread fixed slide rail and slide rail about, adjusts the tension of near non-woven fabrics of syringe needle, reduces the fold, and the guarantee non-woven fabrics punches evenly.
Further, positioning mechanism is including dead lever, connecting block, registration roller and locating plate, the lower extreme of dead lever and the positive upside fixed connection of third fixed bolster, the left side upper end fixedly connected with connecting block of dead lever, the left side fixedly connected with locating plate of connecting block, the left side of locating plate is rotated and is connected with the registration roller, positioning mechanism's quantity is two to horizontal axis bilateral symmetry, through positioning mechanism, can restrict both ends about the non-woven fabrics, prevent that the non-woven fabrics from moving at the in-process side of rolling, ensure the stability of non-woven fabrics rolling.
Further, the quantity of registration roller is four, divide into two sets ofly, and the registration roller external diameter of every group is tangent, and two sets of registration rollers set up the upper and lower both sides at the locating plate respectively, and the roll body of registration roller is the rubber material, and the registration roller is tangent can tightly carry the both sides of compound cloth, and the rubber material can increase the frictional force between registration roller and the non-woven fabrics, and two sets of registration rollers can improve positioning mechanism's fault-tolerance, can effectively fix a position the non-woven fabrics both sides.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is:
1. the utility model discloses be provided with adjustment mechanism, during punching, because needle roller and meshing roller meshing, can carry out the straight line to the non-woven fabrics and pull to lead to near non-woven fabrics formation fold of syringe needle front side, can make the non-woven fabrics punch inhomogeneously, adjustment mechanism's adjusting roller external diameter is tangent can extrude the non-woven fabrics, shrink about the restriction non-woven fabrics, the position of rethread fixed slide rail and slide rail, about the regulation adjusting roller, adjust the tension of near non-woven fabrics of syringe needle, reduce the fold, it is even that the guarantee non-woven fabrics punches.
2. The utility model discloses be provided with the electric heat roller, hot-blast non-woven fabrics is after punching because needle roller and meshing roller meshing punch, can slightly drag the non-woven fabrics, makes the aperture come unstuck around, and the lower electric heat roller of electric heat roller can heat the non-woven fabrics, goes up the compression roller and extrudees, makes the non-woven fabrics aperture bond again around.
3. The utility model discloses be provided with positioning mechanism, both ends about can restricting the non-woven fabrics prevent that the non-woven fabrics from moving at the in-process side of rolling, ensure the stability of non-woven fabrics rolling.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic structural diagram of an adjusting mechanism of the present invention;
fig. 4 is a schematic structural diagram of the positioning mechanism of the present invention.
In the figure: 1 a first fixed bracket; 2, unwinding the roller; 3 a first turning roll mechanism; 4, an adjusting mechanism; 40 fixing the slide rail; 41 a first slider; 42 a slide rail; 43 a second slide; 44 fixing the plate; 45, adjusting rollers; 5 a second fixed bracket; 6, meshing rollers; 7 needle rollers; 8, a second turning roller mechanism; 9, an electric heating roller; 10 a third fixed bracket; 11, a wind-up roll; 12 a positioning mechanism; 120 fixing the rod; 121 connecting blocks; 122 positioning rollers; 123 positioning the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a hot-blast non-woven fabrics drilling equipment, including unreeling roller 2, both ends are rotated and are connected with first fixed bolster 1 about unreeling roller 2, the rear side of unreeling roller 2 is provided with first roll-over mechanism 3, the rear side of first roll-over mechanism 3 is provided with needle roller 7, both ends are rotated and are connected with second fixed bolster 5 about needle roller 7, the downside of needle roller 7 is provided with meshing roller 6, the outside circumference of needle roller 7 evenly is provided with the syringe needle, set up the needle groove with the syringe needle meshing on the outside circumference of meshing roller 6, needle roller 7 passes through the syringe needle and meshes between the needle groove with meshing roller 6, can realize punching hot-blast non-woven fabrics in the rotation, high working efficiency, and punch relatively evenly, the both sides of meshing roller 6 are rotated with second fixed bolster 5 and are connected, the front fixedly connected with adjustment mechanism 4 of second fixed bolster 5, adjustment mechanism 4 is including fixed slide rail 40, The device comprises a first sliding block 41, a sliding rail 42, a second sliding block 43, a fixed plate 44 and adjusting rollers 45, wherein the number of the adjusting rollers 45 is two, the outer diameter of each adjusting roller 45 is tangent, the left end and the right end of each adjusting roller 45 are rotatably connected with the fixed plate 44, the outer side surface of the fixed plate 44 is fixedly connected with the second sliding block 43, one outer side end of the second sliding block 43 is slidably connected with the sliding rail 42, the outer side surface of the sliding rail 42 is fixedly connected with the first sliding block 41, the outer end of the first sliding block 41 is slidably connected with the fixed sliding rail 40, the reverse side of the fixed sliding rail 40 is fixedly connected with the front side of a second fixed support 5, when the hot air non-woven fabric is punched, the needle roller 7 and the meshing roller 6 are meshed, the non-woven fabric can be linearly pulled, so that the non-woven fabric near the front side of the needle head forms wrinkles, the non-woven fabric can be punched unevenly, the outer diameter of each adjusting roller 45 is tangent, the non-woven fabric can be squeezed, and left and right shrinkage of the non-woven fabric can be limited, then the position of the adjusting roller 45 is adjusted up, down, left and right through the fixed slide rail 40 and the slide rail 42, the tension of the non-woven fabrics near the needle head is adjusted, the wrinkles are reduced, the non-woven fabrics are ensured to be evenly punched, the rear side of the second fixed support 5 is provided with a second turning roller mechanism 8, the first turning roller mechanism 3 and the second turning roller mechanism 8 comprise an upper turning roller, a lower turning roller and a support, the lower side of the upper turning roller is provided with a lower turning roller, the left end and the right end of the upper turning roller and the lower turning roller are both rotatably connected with the support, the first turning roller mechanism 3 and the second turning roller mechanism 8 play a role of guiding through the upper guide roller and the lower guide roller, a certain tension can be kept in the transmission process of the hot air non-woven fabrics, in addition, the auxiliary movement function is also realized, the inner side of the second turning roller mechanism 8 is fixedly connected with the electric heating roller 9, the electric heating roller 9 comprises an electric heating component plate, an upper compression roller and a lower electric heating roller, the lower side of the upper compression roller is provided with a lower electric heating roller, the outer diameter of the upper compression roller is tangent with the outer diameter of the lower electric heating roller, the two ends of the upper compression roller and the lower electric heating roller are rotatably connected with an electric heating component plate, the electric heating component plate is fixedly connected with a support of the second turning roller mechanism 8, after the hot-air non-woven fabric is punched, the needle roller and the meshing roller are meshed for punching, the non-woven fabric can be slightly pulled, the periphery of a small hole is degummed, the lower electric heating roller can heat the non-woven fabric, the upper compression roller extrudes the non-woven fabric, the periphery of the small hole of the non-woven fabric is re-bonded, the rear side of the second turning roller mechanism 8 is provided with a winding roller 11, the left side and the right side of the winding roller 11 are rotatably connected with a third fixed support 10, the front upper side of the third fixed support 10 is fixedly connected with a positioning mechanism 12, the positioning mechanism 12 comprises a fixed rod 120, a connecting block 121, a positioning roller 122 and a positioning plate 123, the lower end of the fixed rod 120 is fixedly connected with the front upper side of the third fixed support 10, the upper end of the left side of the fixed rod 120 is fixedly connected with a connecting block 121, the left side of the connecting block 121 is fixedly connected with a positioning plate 123, the left side of the positioning plate 123 is rotatably connected with a positioning roller 122, the number of the positioning mechanisms 12 is two, the two positioning mechanisms are symmetrical left and right around a transverse central axis and pass through the positioning mechanisms 12, can restrict both ends about the non-woven fabrics, prevent that the non-woven fabrics from moving at the in-process side of rolling, the stability of guarantee non-woven fabrics rolling, the quantity of registration roller 122 is four, divide into two sets ofly, the registration roller 122 external diameter of every group is tangent, two sets of registration roller 122 sets up the upper and lower both sides at locating plate 123 respectively, the roll body of registration roller 122 is the rubber material, both sides of compound cloth can tightly be cliied to registration roller 122 tangent, the rubber material can increase the frictional force between registration roller 122 and the non-woven fabrics, two sets of registration roller 122 can improve positioning mechanism 12's fault-tolerance, can effectively fix a position the non-woven fabrics both sides.
The utility model discloses a theory of operation: when the hot air non-woven fabric punching equipment is used, the non-woven fabric is led out from the unreeling roller 2, is firstly bent from the lower bending roller of the first bending roller mechanism 3, then is led into the space between the adjusting rollers 45 of the adjusting mechanism 4 from the upper bending roller of the first bending roller mechanism 3, then is led into the space between the needle roller 7 and the meshing roller 6, is bent through the lower bending roller of the second bending roller mechanism 8, is led into the space between the upper pressing roller and the electric heating roller of the electric heating roller 9, then is led into the reeling roller 11 downwards around the upper bending roller of the second bending roller mechanism 8, two sides of the non-woven fabric are adjusted and respectively positioned between the two groups of positioning rollers 122, finally the adjusting rollers 45 are adjusted, the adjusting rollers 45 drive the second sliding block 43 to slide back and forth in the sliding rail 42 through the fixing plate 44, the sliding rail 42 slides up and down in the fixing sliding rail 40 through the first sliding block 41, the wrinkle is adjusted to be unobvious, the outer diameter of the adjusting rollers 45 can extrude the non-woven fabric tangentially, shrink about restriction non-woven fabrics, regulation roller 45's position is controlled from top to bottom to fixed slide rail 40 of rethread and slide rail 42, adjusts the tension of near syringe needle non-woven fabrics, reduces the fold, can effectively ensure that the non-woven fabrics punches evenly.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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 (7)
1. The utility model provides a hot-blast non-woven fabrics drilling equipment, is including unreeling roller (2), unreel roller (2) about both ends rotate and be connected with first fixed bolster (1), its characterized in that: the rear side of unreeling roller (2) is provided with first turning roller mechanism (3), the rear side of first turning roller mechanism (3) is provided with needle roller (7), both ends are rotated and are connected with second fixed bolster (5) about needle roller (7), the downside of needle roller (7) is provided with meshing roller (6), the both sides and the second fixed bolster (5) of meshing roller (6) are rotated and are connected, the positive fixedly connected with adjustment mechanism (4) of second fixed bolster (5), the rear side of second fixed bolster (5) is provided with second turning roller mechanism (8), the inboard fixedly connected with electric heat roller (9) of second turning roller mechanism (8), the rear side of second turning roller mechanism (8) is provided with wind-up roller (11), the left and right sides of wind-up roller (11) is rotated and is connected with third fixed bolster (10), and a positioning mechanism (12) is fixedly connected to the upper side of the front surface of the third fixing support (10).
2. The apparatus for perforating hot-air non-woven fabric according to claim 1, wherein: first turning roller mechanism (3) and second turning roller mechanism (8) are including turning over the roller, turning over roller and support down on, the downside that turns over the roller is provided with down the turning over roller, both ends all rotate about turning over roller and turning over roller down and be connected with the support.
3. The apparatus for perforating hot-air non-woven fabric according to claim 1, wherein: the outer circumference of the needle roller (7) is uniformly provided with needles, and the outer circumference of the meshing roller (6) is provided with needle grooves meshed with the needles.
4. The apparatus for perforating hot-air non-woven fabric according to claim 1, wherein: the electric heating roller (9) comprises an electric heating component plate, an upper compression roller and a lower electric heating roller, the lower side of the upper compression roller is provided with the lower electric heating roller, the outer diameter of the upper compression roller is tangent to the outer diameter of the lower electric heating roller, the two ends of the upper compression roller and the two ends of the lower electric heating roller are rotatably connected with the electric heating component plate, and the electric heating component plate is fixedly connected with a support of the second turning roller mechanism (8).
5. The apparatus for perforating hot-air non-woven fabric according to claim 1, wherein: adjustment mechanism (4) are including fixed slide rail (40), first slider (41), slide rail (42), second slider (43), fixed plate (44) and regulating roller (45), the quantity of regulating roller (45) is two, and the external diameter of regulating roller (45) is tangent, both ends all rotate with fixed plate (44) and are connected about regulating roller (45), the outside surface and second slider (43) fixed connection of fixed plate (44), the outside one end and the slide rail (42) sliding connection of second slider (43), the outside surface and first slider (41) fixed connection of slide rail (42), the outer end and the fixed slide rail (40) sliding connection of first slider (41), the reverse side and the front fixed connection of second fixed bolster (5) of fixed slide rail (40).
6. The apparatus for perforating hot-air non-woven fabric according to claim 1, wherein: positioning mechanism (12) are including dead lever (120), connecting block (121), registration roller (122) and locating plate (123), the lower extreme of dead lever (120) and the positive upside fixed connection of third fixed bolster (10), the left side upper end fixedly connected with connecting block (121) of dead lever (120), the left side fixedly connected with locating plate (123) of connecting block (121), the left side rotation of locating plate (123) is connected with registration roller (122), the quantity of positioning mechanism (12) is two to horizontal axis bilateral symmetry.
7. The apparatus for perforating hot-air non-woven fabric according to claim 6, wherein: the number of the positioning rollers (122) is four, the positioning rollers are divided into two groups, the outer diameters of the positioning rollers (122) of each group are tangent, the two groups of the positioning rollers (122) are respectively arranged on the upper side and the lower side of the positioning plate (123), and roller bodies of the positioning rollers (122) are made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022973714.4U CN214561494U (en) | 2020-12-11 | 2020-12-11 | Hot-blast non-woven fabrics drilling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022973714.4U CN214561494U (en) | 2020-12-11 | 2020-12-11 | Hot-blast non-woven fabrics drilling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214561494U true CN214561494U (en) | 2021-11-02 |
Family
ID=78364165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022973714.4U Expired - Fee Related CN214561494U (en) | 2020-12-11 | 2020-12-11 | Hot-blast non-woven fabrics drilling equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214561494U (en) |
-
2020
- 2020-12-11 CN CN202022973714.4U patent/CN214561494U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20211102 |