CN113737351A - PAN fiber beating-up device - Google Patents
PAN fiber beating-up device Download PDFInfo
- Publication number
- CN113737351A CN113737351A CN202111199595.4A CN202111199595A CN113737351A CN 113737351 A CN113737351 A CN 113737351A CN 202111199595 A CN202111199595 A CN 202111199595A CN 113737351 A CN113737351 A CN 113737351A
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- Prior art keywords
- heald frame
- beating
- heald
- support
- cross beam
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- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 230000000149 penetrating effect Effects 0.000 claims abstract description 38
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 18
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 17
- 239000004917 carbon fiber Substances 0.000 abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 229920002239 polyacrylonitrile Polymers 0.000 description 45
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 239000010410 layer Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 238000003763 carbonization Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C13/00—Shedding mechanisms not otherwise provided for
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Fibers (AREA)
Abstract
The invention discloses a PAN fiber beating-up device which comprises a support, and a first heald frame and a second heald frame which are arranged in the support, have the same structure and are arranged in the front and back direction, wherein the first heald frame comprises an upper cross beam, a lower cross beam, and a left side baffle and a right side baffle which are connected between the upper cross beam and the lower cross beam, a first heald penetrating rod and a second heald penetrating rod which are used for sequentially penetrating healds are fixedly arranged on the left side baffle, a porcelain eye is inlaid in the center of each heald, a sliding rail is arranged on the side wall of the support, the first heald frame and the second heald frame are connected with the support in a sliding mode through the sliding rail, and the first heald frame and the second heald frame are respectively connected with an air cylinder and a piston rod of the air cylinder. According to the device, the first heald frame and the second heald frame are arranged to form two independent parts, so that the PAN fiber independently penetrates through porcelain eyes of the first heald frame and the second heald frame, and the PAN fiber is layered to facilitate the carbon fiber for beating-up to penetrate through the beating-up by combining the movement of the first heald frame and the second heald frame to form the height difference, so that the beating-up speed is increased, and the beating-up accuracy and the production efficiency are further improved.
Description
Technical Field
The invention belongs to the technical field of carbon fiber production equipment, and particularly relates to a PAN fiber beating-up device.
Background
The carbon fiber has the excellent characteristics of low density, high specific strength, high specific modulus, good electric and thermal conductivity, low thermal expansion coefficient and the like, and has wide application in the fields of aerospace, transportation, sports and leisure, wind power and the like. With the development of carbon fiber production technology and the rapid expansion of the application field in demand for carbon fibers, the yield of carbon fibers shows a tendency to increase greatly year by year.
The PAN carbon fiber is the most widely applied carbon fiber due to the excellent comprehensive performance, the market share of the PAN carbon fiber can reach 90%, with the large demand of the vast field for the carbon fiber, in order to realize large-scale industrial production and enhance the competitiveness of the PAN carbon fiber, enterprises pay attention to the production technology and the production cost of the carbon fiber, and the dry-jet wet spinning technology, the large tow technology, the low-cost technology, the rapid oxidation and carbonization technology, and the innovative auxiliary production device and equipment are widely favored.
The beating-up technology is used as an auxiliary technology in the production process of carbon fibers, a small engineering line generally adopts a manual beating-up mode to divide tows, the tows are guaranteed not to be wound mutually, the stability of the tows in the oxidation and carbonization processes is improved, however, the traditional manual beating-up mode is long in time consumption, high in error rate, low in risk of dealing with sudden oxidation and carbonization problems, and the production efficiency of fiber oxidation and carbonization is severely limited.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a PAN fiber beating-up device in order to overcome the above-mentioned shortcomings of the prior art. This beating-up device is through setting up the first heald frame and the second heald frame that the structure is the same and arrange around being, has formed two parts of independently wearing to establish the harness wire, make certain quantity of PAN fibre independently crisscross wear to establish in the porcelain eye of first heald frame and second heald frame according to the rule of design, combine to set up slide rail and cylinder, make first heald frame and second heald frame motion form the difference in height, thereby be convenient for beating-up with the PAN fibre layering and pass the beating-up with the carbon fiber, beat-up speed has been improved, and then beating-up's rate of accuracy and production efficiency have been improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a PAN fibre device of beating-up, its characterized in that includes the support and sets up first heald frame and the second heald frame that the structure is the same and be the front and back and arrange in the support, first heald frame includes entablature, bottom end rail to and the left side of connecting between entablature and bottom end rail keeps off with the right side, and keeps off on the left side and fixedly be provided with the first pole and the second pole of wearing to the harness wire that are used for wearing to establish the harness wire in proper order, the center of harness wire is inlayed and is had the porcelain eye, be provided with the slide rail on the lateral wall of support, and the left side of first heald frame and second heald frame keeps off, right side keeps off and all passes through slide rail and support sliding connection, the bottom end rail of first heald frame is connected with the cylinder that sets up on the support base, and the bottom end rail of second heald frame is connected with the piston rod of cylinder.
The PAN fiber beating-up device is characterized in that a cemented mosaic ceramic eye is adopted in the center of the heddle.
The PAN fiber beating-up device is characterized in that a side blocking rod is detachably fixed between one end, close to the right side block, of the first heald penetrating rod and one end, close to the right side block, of the second heald penetrating rod and the right side block.
The PAN fiber beating-up device is characterized in that the number of the cylinders is two, and the cylinders are symmetrically arranged on the base of the support.
The PAN fiber beating-up device is characterized in that the slide rail is arranged along the height direction of the side wall of the bracket.
Compared with the prior art, the invention has the following advantages:
1. according to the beating-up device, the first heald frame and the second heald frame which are identical in structure and are arranged in the front-back direction are arranged to form two parts for independently penetrating the healds, so that a certain amount of PAN (polyacrylonitrile) fibers are independently and alternately penetrated in porcelain eyes of the first heald frame and the second heald frame according to a designed rule, and a sliding rail and an air cylinder which are connected with the first heald frame and the second heald frame are combined to form a height difference in motion, so that the PAN fibers are layered to facilitate the penetration of carbon fibers for beating-up through beating-up, the beating-up speed is improved, and the accuracy and the production efficiency of beating-up are improved.
2. According to the beating-up device, the porcelain eye is embedded in the center of the heddle and is used for penetrating the PAN fiber to be layered, so that damage to the PAN fiber tows caused by beating-up operation in the running process of the PAN fiber tows is effectively prevented, beating-up efficiency is further improved, and the quality of the prepared PAN fiber is improved.
3. According to the beating-up device, the side stop rods are arranged between the right side stop and the end, close to the right side stop, of the first heddle penetrating rod and the end, close to the right side stop, of the second heddle penetrating rod, so that heddles are prevented from falling off from the heddle penetrating rods, the beating-up error rate is further reduced, meanwhile, the first heddle penetrating rod and the second heddle penetrating rod are effectively fixed, the stability of PAN fiber layering is enhanced, and the smooth beating-up process is facilitated.
4. The beating-up device has good layering effect and high beating-up efficiency, effectively prevents the PAN fiber tows from being cross-linked and rubbed for a long time to cause local heat accumulation, avoids damage to the PAN fibers, improves the running stability of the PAN fiber tows in the beating-up process, and meets the requirements of large-scale continuous production on beating-up work.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is a front view of the structure of the PAN fiber beating-up device of the invention.
Fig. 2 is a left side view of the structure of the PAN fiber beating-up device of the present invention.
Fig. 3 is a schematic diagram of the operation of the PAN fiber beating-up device of the present invention.
Description of reference numerals:
1-a support; 2, a cylinder; 3-1 — a first heald frame;
3-2 — a second heald frame; 4-1 — a first heald-threading rod; 4-2-a second heald-threading rod;
5-harness wire; 6-porcelain eye; 7, a sliding rail;
8-side stop lever.
Detailed Description
Example 1
As shown in fig. 1 and 2, the PAN fiber beating-up device of this embodiment includes a support 1, and a first heald frame 3-1 and a second heald frame 3-2 which are arranged in the support 1 and have the same structure and are arranged in a front-back manner, the first heald frame 3-1 includes an upper cross member, a lower cross member, and a left side stopper and a right side stopper connected between the upper cross member and the lower cross member, and the left side stopper is fixedly provided with a first heald penetrating rod 4-1 and a second heald penetrating rod 4-2 for sequentially penetrating a heald 5, a porcelain eye 6 is inlaid in the center of the heald 5, a slide rail 7 is provided on a side wall of the support 1, and the left side stopper and the right side stopper of the first heald frame 3-1 and the second heald frame 3-2 are slidably connected with the support 1 through the slide rail 7, the lower cross member of the first heald frame 3-1 is connected with a cylinder 2 provided on a base of the support 1, and the lower cross beam of the second heald frame 3-2 is connected with the piston rod of the cylinder 2.
The PAN fiber beating-up device of the embodiment forms a main body structure of the beating-up device by arranging a support 1, a first heald frame 3-1 and a second heald frame 3-2, wherein the first heald frame 3-1 comprises an upper cross beam, a lower cross beam, a left side baffle and a right side baffle which are connected between the upper cross beam and the lower cross beam, a hollow cuboid structure is formed, the hollow structure provides a containing space for the arrangement of two heald penetrating rods and the arrangement of a certain number of healds 5, a first heald penetrating rod 4-1 and a second heald penetrating rod 4-2 which are used for sequentially penetrating the healds 5 are fixedly arranged on the left side baffle, a porcelain eye 6 is inlaid in the center of each heald 5, so that the healds 5 of a certain number sequentially penetrate the first heald penetrating rod 4-1 and the second heald penetrating rod 4-2 and are arranged in the hollow structure of the heald frames, and the first heald frame 3-1 and the second heald frame 3-2 are arranged in the support 1 in a front-back manner, two identical parts which are arranged in the front and back direction and are used for independently penetrating the heddles are formed, so that a certain amount of PAN (polyacrylonitrile) fibers are independently and alternately penetrated in the porcelain eyes 6 at the centers of the heddles 5 on the first heald frame 3-1 and the second heald frame 3-2 according to the designed rule, the mutual winding between PAN fiber tows is avoided, the operation stability of the PAN fibers is improved, and the damage to the PAN fiber tows caused by the beating-up operation in the operation process of the heddles is effectively prevented.
In the beating-up device of the embodiment, the side wall of the support 1 is provided with the slide rail 7, and the left side baffle and the right side baffle of the first heald frame 3-1 and the second heald frame 3-2 are connected with the support 1 in a sliding manner through the slide rail 7, so that the left side baffle and the right side baffle of the first heald frame 3-1 and the second heald frame 3-2 move on the side wall of the support 1 along the up-and-down direction through the slide rail 7, thereby driving the first heald frame 3-1 and the second heald frame 3-2 to move on the side wall of the support 1 respectively, meanwhile, the lower cross beam of the first heald frame 3-1 is connected with the cylinder 2 on the base of the support 1, usually fixedly connected, the lower cross beam of the second heald frame 3-2 is connected with the piston rod of the cylinder 2, namely movably connected, of course, the lower cross beam of the first heald frame 3-1 can also be arranged to be movably connected with the cylinder 2, the lower cross beam of the second heald frame 3-2 is fixedly connected with the cylinder 2, the device provides power for the sliding motion of the first heald frame 3-1 or the second heald frame 3-2 on the side wall of the bracket 1 through the slide rail 7, namely, the first heald frame 3-1 or the second heald frame 3-2 is driven to move up and down on the side wall of the bracket 1 through the action of the cylinder 2, so that a height difference is formed between the first heald frame 3-1 and the second heald frame 3-2, and PAN fibers in porcelain eyes 6 respectively penetrating through centers of healds 5 on the first heald frame 3-1 and the second heald frame 3-2 are divided into an upper layer and a lower layer, so that the carbon fibers for beating-up penetrate through a clamping layer area between the upper layer and the lower layer and are led back from the outer part of the lower layer to be fixed, thereby completing the beating-up work, simplifying the beating-up process, improving the beating-up speed, generally controlling the beating-up process within 1min, further improving the accuracy and the production efficiency of beating-up, meanwhile, local heat accumulation caused by long-time mutual crosslinking of the PAN fiber tows is effectively prevented, damage to the PAN fibers is avoided, the running stability of the PAN fiber tows in the beating-up process is improved, and the requirement of large-scale continuous production on beating-up work is met.
Furthermore, the center of the heddle 5 is provided with a cemented mosaic porcelain eye 6. In the embodiment, the porcelain eye 6 is firmly embedded in the center of the heddle 5 by a cementing method, so that the phenomenon that the moving or falling of the porcelain eye 6 affects the layering process of the PAN fiber is avoided, and the successful beating-up process is ensured; generally, the inner wall of the porcelain eye 6 should be treated to be smooth so as to avoid the rough inner wall rubbing and damaging the PAN fiber.
Furthermore, a side stop rod 8 is detachably fixed between one end of the first heddle rod 4-1 and the second heddle rod 4-2 close to the right side stop and the right side stop. In the embodiment, the side stop rod 8 is detachably fixed between one end of the first heddle penetrating rod 4-1 and the right heddle penetrating rod 4-2 close to the right side stop and the right side stop, so that on one hand, heddles penetrating the first heddle penetrating rod 4-1 and the second heddle penetrating rod 4-2 are prevented from separating from the heddle penetrating rods to cause shedding of the heddles, the beating-up error rate is further reduced, the risk of PAN fiber to follow-up oxidation and carbonization burst problems is reduced, on the other hand, the first heddle penetrating rod 4-1 and the second heddle penetrating rod 4-2 are effectively fixed, the stability of movement between the first heddle frame 3-1 and the second heddle frame 3-2 in the beating-up process for layering the PAN fiber is enhanced, the beating-up process is favorably carried out smoothly, the side stop rod 8 is convenient to detach, and the heddle penetrating rods and the heddles are maintained and replaced.
Further, the number of the cylinders 2 is two, and the cylinders are symmetrically arranged on the base of the bracket 1. In the embodiment, the two cylinders 2 are symmetrically arranged on the base of the support 1, so that on one hand, enough power is provided, the first heald frame 3-1 or the second heald frame 3-2 is guaranteed to smoothly slide on the side wall of the support 1 through the slide rail 7 to form a height difference, on the other hand, the uniformity of the power is improved, the uniformity of the height difference between the first heald frame 3-1 and the second heald frame 3-2 is further improved, and the accuracy of the beating-up position is improved.
Further, the slide rail 7 is disposed along a height direction of the side wall of the rack 1. In the embodiment, the slide rails 7 are arranged along the height direction of the side wall of the support 1, namely, the first heald frame 3-1 or the second heald frame 3-2 is controlled to vertically move up and down on the side wall of the support 1, so that the layering speed of the healds in the first heald frame 3-1 and the second heald frame 3-2 is increased, and the beating-up speed and the production efficiency are further increased.
As shown in fig. 3, the working process of the PAN fiber beating-up device of the present invention is as follows: arranging corresponding parts in a first heald frame 3-1, a second heald frame 3-2 and a beating-up device in the same horizontal direction, sequentially penetrating fibers corresponding to odd numbers in PAN fibers through porcelain eyes 6 in the centers of the heddles 5 on the first heald frame 3-1, sequentially penetrating fibers corresponding to even numbers in the PAN fibers through the porcelain eyes 6 in the centers of the heddles 5 on the second heald frame 3-2, starting a cylinder 2, and under the action of upward thrust of a piston rod of the cylinder 2, performing sliding motion on the side wall of a bracket 1 by the second heald frame 3-2 through a slide rail 7 to form a height difference between the first heald frame 3-1 and the second heald frame 3-2, so that the heddles respectively penetrating through the first heald frame 3-1 and the second heald frame 3-2 are regularly divided into an upper layer and a lower layer according to the odd-even order, and carbon fibers for beating-up penetrate through the upper layer, The interlayer area between the lower two layers is led back from the outside of the lower layer to fix the two ends, and then the piston rod of the cylinder 2 is returned to the initial position to complete the beating-up work.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (5)
1. The PAN fiber beating-up device is characterized by comprising a support (1), a first heald frame (3-1) and a second heald frame (3-2) which are arranged in the support (1) in a front-back mode and have the same structure, wherein the first heald frame (3-1) and the second heald frame (3-2) are arranged in the support (1), the first heald frame (3-1) comprises an upper cross beam, a lower cross beam, a left side baffle and a right side baffle which are connected between the upper cross beam and the lower cross beam, a first heald penetrating rod (4-1) and a second heald penetrating rod (4-2) which are used for sequentially penetrating healds (5) are fixedly arranged on the left side baffle, a porcelain eye (6) is inlaid in the center of each heald (5), a sliding rail (7) is arranged on the side wall of the support (1), the left side baffle and the right side baffle of the first heald frame (3-1) and the second heald frame (3-2) are both connected with the support (1) in a sliding mode through the sliding rail (7), and the lower cross beam of the first heald frame (3-1) and an air cylinder (2) arranged on the base of the support (1) And the lower beam of the second heald frame (3-2) is connected with the piston rod of the cylinder (2).
2. A PAN fibre beating-up device according to claim 1, characterised in that the centre of the heddle (5) is provided with a glued inlay eyelet (6).
3. A PAN fibre beating-up device according to claim 1, characterised in that a side bar (8) is detachably fixed between the right side bar and the end of the first (4-1) and second (4-2) heddle bar close to the right side bar.
4. A PAN fibre beating-up device according to claim 1, characterised in that the number of cylinders (2) is two and arranged symmetrically on the base of the stand (1).
5. A PAN fibre beating-up device according to claim 1, characterised in that the slide rail (7) is arranged in the height direction of the side wall of the stand (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111199595.4A CN113737351A (en) | 2021-10-14 | 2021-10-14 | PAN fiber beating-up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111199595.4A CN113737351A (en) | 2021-10-14 | 2021-10-14 | PAN fiber beating-up device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113737351A true CN113737351A (en) | 2021-12-03 |
Family
ID=78726728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111199595.4A Pending CN113737351A (en) | 2021-10-14 | 2021-10-14 | PAN fiber beating-up device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113737351A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331293A1 (en) * | 2002-01-25 | 2003-07-30 | Etablissements Burckle et Compagnie S.A.S. | Method of fabricating a heddle frame slat for the heddle frame of a weaving machine and a heddle frame slat obtained by such method |
| WO2012081735A1 (en) * | 2010-12-17 | 2012-06-21 | ナンカイ工業株式会社 | Heald frame stave constituted of carbon-fiber-reinforced composite material, and mounting part structure for side stay |
| CN103306026A (en) * | 2013-05-23 | 2013-09-18 | 吴江市信合织造有限公司 | Air cylinder type shed-forming mechanism |
| CN213328043U (en) * | 2020-09-08 | 2021-06-01 | 重庆花神丝绸有限公司 | Heald frame fitting of textile machine with driving piece |
-
2021
- 2021-10-14 CN CN202111199595.4A patent/CN113737351A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331293A1 (en) * | 2002-01-25 | 2003-07-30 | Etablissements Burckle et Compagnie S.A.S. | Method of fabricating a heddle frame slat for the heddle frame of a weaving machine and a heddle frame slat obtained by such method |
| WO2012081735A1 (en) * | 2010-12-17 | 2012-06-21 | ナンカイ工業株式会社 | Heald frame stave constituted of carbon-fiber-reinforced composite material, and mounting part structure for side stay |
| CN103306026A (en) * | 2013-05-23 | 2013-09-18 | 吴江市信合织造有限公司 | Air cylinder type shed-forming mechanism |
| CN213328043U (en) * | 2020-09-08 | 2021-06-01 | 重庆花神丝绸有限公司 | Heald frame fitting of textile machine with driving piece |
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Application publication date: 20211203 |