CN110485035B - Magnetic suspension weft insertion device with variable magnetic resistance - Google Patents
Magnetic suspension weft insertion device with variable magnetic resistance Download PDFInfo
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- CN110485035B CN110485035B CN201910856310.6A CN201910856310A CN110485035B CN 110485035 B CN110485035 B CN 110485035B CN 201910856310 A CN201910856310 A CN 201910856310A CN 110485035 B CN110485035 B CN 110485035B
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- weft insertion
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- sheet
- magnetic conduction
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- 238000003780 insertion Methods 0.000 title claims abstract description 104
- 230000037431 insertion Effects 0.000 title claims abstract description 104
- 239000000725 suspension Substances 0.000 title claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 82
- 229910052742 iron Inorganic materials 0.000 claims abstract description 34
- 238000005339 levitation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 abstract description 2
- 238000009941 weaving Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000005300 metallic glass Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/27—Drive or guide mechanisms for weft inserting
- D03D47/275—Drive mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
The invention relates to a variable reluctance magnetic suspension weft insertion device which is characterized by comprising an electromagnetic assembly and an electromagnetic controller; the electromagnetic assembly comprises an electromagnet coil, a magnetic conduction upright post and a rotor weft insertion piece; the electromagnet coils and the magnetic conduction upright posts are arranged in a straight line, the number of the electromagnet coils is matched, and each electromagnet coil consists of an internal iron core and coils wound on the periphery of the iron core; the tops of the magnetic conduction upright posts extend oppositely to form a horizontal magnetic suspension track; the rotor weft insertion sheet consists of a wear-resistant shell and a rotor iron sheet embedded on the wear-resistant shell; the electromagnet coil is clamped between the magnetic conduction upright posts, and the two ends of the iron core of the electromagnet coil are integrally formed with the magnetic conduction upright posts or are in close contact connection without an air gap. The invention drives the acceleration and deceleration movement of the weft insertion sheet through the magnetic resistance change, thereby controlling the forward and backward movement of the weft insertion sheet. The rotor weft insertion piece can be designed into a weft feeder and a weft receiver according to the requirement, and the connection of weft feeding and weft receiving is formed in the middle of the loom.
Description
Technical Field
The invention relates to a weft insertion device of a loom, in particular to a magnetic suspension weft insertion device of a loom, and belongs to the technical field of textile machinery.
Background
Currently, the weaving machines on the market are classified into two main types, i.e. a shuttleless loom and a shuttleless loom, according to the weft insertion manner of weaving. The shuttle loom is a loom which adopts a traditional shuttle (a wooden shuttle or a plastic shuttle) to draw weft; weft insertion modes of shuttleless looms are various and mainly include rapier, jet (jet, water jet), projectile, multi-shed (multi-phase) and weaving. Shuttle looms often repeatedly project due to the large volume and weight of the shuttle, thereby bringing a series of problems of large vibration, high noise, low speed, low efficiency and the like of the loom. The weft insertion modes of the shuttleless loom have defects, and all the weft insertion modes have weaving types which cannot be applied to the shuttleless loom. Particularly in the aspect of width of a gate, the motion trend of weft insertion sheets of most of the current shuttleless looms is gradually reduced from strong to weak in weft insertion passing procedures, so that certain limit weaving width exists, and the requirement of larger weaving width cannot be met.
In view of the above, providing a weft insertion device capable of improving the width weaving ability of a fabric gate would widen the design ideas of fabric designers, further satisfying the market demand for wide fabrics.
Disclosure of Invention
The invention aims to provide a variable reluctance magnetic suspension weft insertion device which utilizes the principle that the reluctance of an electromagnet changes and an armature moves towards the minimum reluctance direction to drive a weft insertion device by electromagnetic power, and the electromagnetic power for driving the weft insertion device is kept constant continuously through the structural optimization of the whole device, so that the weft insertion process of a loom is realized.
In order to solve the problems, the invention adopts the following technical scheme:
the variable reluctance magnetic suspension weft insertion device is characterized by comprising the following components: an electromagnetic component and an electromagnetic controller for controlling the electromagnetic component to be powered on and powered off; wherein,
the electromagnetic assembly comprises an electromagnet coil electrically connected with an electromagnetic controller, a magnetic conduction upright post for magnetic conduction and a rotor weft insertion piece erected and installed on the top of the magnetic conduction upright post;
the electromagnet coils are arranged in a plurality of straight lines, and each electromagnet coil consists of an internal iron core and coils wound on the periphery of the iron core;
the number of the magnetic conduction upright posts is matched with that of the electromagnet coils, the magnetic conduction upright posts are also arranged in a straight line, each magnetic conduction upright post is provided with a pair of upright posts which are arranged in opposite directions, and the tops of the two upright posts extend in opposite directions to form a horizontal magnetic suspension track;
the rotor weft insertion sheet consists of a wear-resistant shell and a rotor iron sheet embedded on the wear-resistant shell;
the electromagnet coil is clamped between the magnetic conduction upright posts, and the two ends of the iron core of the electromagnet coil are integrally formed with the magnetic conduction upright posts or are in close contact connection without an air gap.
The mover iron sheet of the mover weft insertion sheet has a contour shape in which an air gap is gradually changed from large to small with the end parts of the upright posts constituting the magnetic levitation track, the contour shape is generally most effective in a curve shape or a diagonal shape, and the mover iron sheet of the contour shape drives the whole mover weft insertion sheet to travel in a predetermined direction by means of the gradually changed air gap formed between itself and the end parts of the upright posts.
The magnetic suspension track is a chute formed at the tops of the two upright posts in opposite directions and comprises a first chute used for accommodating one side of the rotor weft insertion sheet and a second chute used for accommodating the other side of the rotor weft insertion sheet, and the first chute and the second chute are oppositely constructed into a horizontal magnetic suspension track at the top of the electromagnet coil.
The wear-resistant shell of the rotor weft insertion piece is made of light wear-resistant materials;
the rotor iron sheet and the magnetic conduction upright post of the rotor weft insertion sheet are made of materials with high magnetic conductivity, high magnetic flux density, low coercive force and low loss like amorphous metal materials.
The shell of the rotor weft insertion piece adopts a strip-shaped sheet structure, and the installation positions and the installation quantity of the rotor iron pieces on the shell are matched according to actual requirements.
Further, the rotor iron sheet of the rotor weft insertion sheet is provided with a hollowed-out portion, and the hollowed-out portion is used for reducing the dead weight of the whole rotor weft insertion sheet so as to improve the movement speed of the whole rotor weft insertion sheet.
Further, the weft insertion device further comprises a base, and the electromagnet coil and the magnetic conduction upright post are fixedly arranged on the base.
The number of the electromagnet coils and the magnetic conduction upright posts can be set according to the width requirement of the fabric door.
The electromagnetic controller is electrically connected with the corresponding electromagnet coils through a plurality of wires respectively, and the electrifying control modes of the electromagnetic controller on different electromagnet coils are specifically adapted and adjusted by combining the number of the electromagnet coils and the number and the shape of the rotor iron sheets in the rotor weft insertion sheets.
According to the variable reluctance magnetic suspension weft insertion device, by utilizing the principle that the reluctance of an electromagnet changes and an armature moves towards the minimum reluctance direction, the forward or backward movement of a rotor weft insertion piece is controlled by controlling the on-off of the electromagnets at different positions, so that the weft insertion process of a loom is realized; meanwhile, the gravity of the weft insertion blade is overcome by the attraction force of the electromagnet, so that the motion friction resistance of the weft insertion blade is reduced, the abrasion of the weft insertion blade is lightened, the service life of the weft insertion blade is prolonged, and the energy consumption in the weft insertion process is reduced. The rotor weft insertion sheet, the electromagnetic coil and the magnetic conduction upright post are matched, the on-off power of the electromagnet can be orderly controlled by combining the control mode of the electromagnetic controller, the magnetic resistance change is formed between the rotor weft insertion sheet and the magnetic suspension track, and the acceleration and deceleration movement of the weft insertion sheet is driven by the magnetic resistance change, so that the forward and backward movement of the weft insertion sheet is controlled. The rotor weft insertion piece can be designed into a weft feeder and a weft receiver according to the requirement, and the connection of weft feeding and weft receiving is formed in the middle of the loom.
Drawings
Fig. 1: a schematic diagram of the whole structure of a variable reluctance magnetic suspension weft insertion device;
fig. 2: one side of the magnetic conduction upright post is provided with an upright post structure schematic diagram;
fig. 3: a schematic diagram of a rotor weft insertion sheet structure according to the first embodiment;
fig. 4: a schematic diagram of a rotor weft insertion sheet structure in the third embodiment;
fig. 5: a schematic diagram of a rotor weft insertion sheet structure in the fourth embodiment;
fig. 6: a schematic diagram of a rotor weft insertion sheet structure in the fifth embodiment;
in the figure, 11, electromagnet coils, 12, magnetic conduction upright posts, 12a, upright posts, 12b, sliding grooves, 13, rotor weft insertion sheets, 13a, a wear-resistant shell, 13b, rotor iron sheets, 13c, hollowed-out parts, 2, an electromagnetic controller, 3 and a base.
Detailed Description
Several specific structural embodiments of the present invention are described below in conjunction with the accompanying drawings to provide further details of the structural composition, design principles, and operation of the present invention to those skilled in the art. It should be understood that the following examples are only relatively optimized embodiments chosen to fully illustrate the technical aspects of the present invention, and should not be taken as limiting the scope of the present invention.
Example 1
The utility model provides a magnetic suspension weft insertion device of variable reluctance, main structure includes base 3, installs the electromagnetic assembly 1 on base 3 to and be used for controlling electromagnetic assembly 1 to switch on electromagnetic controller 2. The electromagnetic assembly consists of an electromagnet coil 11, a magnetic conduction upright post 12 and a rotor weft insertion piece 13; the number of the electromagnet coils 11 and the magnetic conduction upright posts 12 is designed to be 8 groups, the electromagnet coils and the magnetic conduction upright posts 12 are arranged on the base 3 in a straight line, and the rotor weft insertion pieces 13 are erected on the top of the electromagnet coils 11 through the magnetic conduction upright posts 12. Each electromagnet coil 11 is composed of an inner iron core and a coil wound around the periphery of the iron core; each magnetic conduction upright post 12 is composed of a pair of upright posts 12a which are arranged in opposite directions, the magnetic conduction upright posts 12 are made of amorphous metal materials, and the tops of the two upright posts extend horizontally in opposite directions to form a magnetic suspension track for erecting a rotor weft insertion piece 13. The electromagnet coil 11 is sandwiched between two posts 12a of the magnetically conductive post 12, in this embodiment, the iron core of the electromagnet coil 11 and the magnetically conductive post 12 are separate components, and two ends of the iron core of the electromagnet coil 11 are in close contact with the posts 12a on the adjacent sides thereof without an air gap. The rotor weft insertion piece 13 is composed of a wear-resistant shell 13a and a rotor iron piece 13b embedded on the wear-resistant shell 13a, wherein the wear-resistant shell 13a is made of a light wear-resistant material, and the rotor iron piece 13b is made of an amorphous metal material. The whole shell 13a of the rotor weft insertion piece 13 in the embodiment is in a strip-shaped sheet structure, a rotor iron piece 13b with an oval outer contour is arranged in the middle of the shell 13a, a hollowed-out part 13c is arranged in the middle of the rotor iron piece 13b, the rotor iron piece 13b in the shape is arranged on a magnetic suspension track, an air gap formed between the rotor iron piece 13b and the end part of a stand column forming the magnetic suspension track is transitionally graded, and the whole rotor weft insertion piece can be driven to move along a preset direction by virtue of the change of the graded air gap. The magnetic suspension track is a chute 12b formed at the top of the two vertical columns 12a in opposite directions, and comprises a first chute for accommodating one side of the rotor weft insertion sheet and a second chute for accommodating the other side of the rotor weft insertion sheet, wherein the first chute and the second chute relatively form a horizontal magnetic suspension track at the top of the electromagnet coil. The magnetic conduction upright post is made of amorphous metal materials. The electromagnetic controller 2 in the embodiment is respectively communicated with 8 electromagnet coils 11 through 8 wires, the control scheme adopts the mode that the 8 electromagnet coils are electrified in sequence, and the rotor weft insertion piece 13 moves forwards or backwards along the magnetic levitation track through magnetic resistance change.
Example two
The present embodiment is different from the first embodiment in that the shape of the iron runner sheet 13b of the weft insertion runner 13 is prismatic.
Example III
The difference between this embodiment and the first embodiment is that 3 iron pieces 13b are uniformly distributed on the wear-resistant housing 13a of the weft insertion piece 13, the iron pieces 13b are hexagonal, and two sides of the iron pieces 13b have arc sections or straight line sections with transition gradual changes, so that an air gap with gradual changes is formed between the iron pieces 13b and the end of the upright post to provide magnetic force. The electromagnetic controller 2 of the embodiment is powered on by sequentially and alternately powering on every three adjacent groups of electromagnet coils so as to meet the normal running of the rotor weft insertion sheet.
Example IV
The difference between this embodiment and the third embodiment is that the middle part of the mover iron sheet 13b has a hollowed-out part 13c.
Example five
The difference between this embodiment and the first embodiment is that 11 iron pieces 13b are uniformly distributed on the wear-resistant housing 13a of the weft insertion piece 13, and the iron pieces 13b are peanut-shaped.
Example six
The difference between this embodiment and the first embodiment is that the iron core of the electromagnet coil 11 and the magnetic conductive column 12 are integrally formed.
Example seven
The difference between this embodiment and the first embodiment is that a rotor iron sheet 13b is installed in the middle of the wear-resistant housing 13a of the rotor weft insertion sheet 13, and the shape of the rotor iron sheet 13b is prismatic.
The variable reluctance magnetic suspension weft insertion device in the embodiment utilizes the principle that when the reluctance of the electromagnet changes, the armature moves towards the direction with the minimum reluctance.
The structure and the motion principle of the variable reluctance magnetic suspension weft insertion device are introduced as follows:
the rotor weft insertion piece 13 is used as a moving armature, the magnetic conduction upright post 12 and the electromagnet coil 11 form an electromagnet capable of generating magnetism, the magnetic conduction upright post 12 and the electromagnet coil 11 are arranged according to a certain interval, and the top structure of the magnetic conduction upright post 12 forms a running track of the rotor weft insertion piece 13. When the rotor weft insertion sheet 13 is required to accelerate forwards, the electromagnet coils 11 of the previous group are powered at proper positions, and when the electromagnet coils 11 are powered on, magnetic force lines reach the rotor weft insertion sheet 13 through the air gap between the magnetic conduction upright post 12a on one side and the upright post 12a and the rotor iron sheet 13b, and then reach the other upright post 12a through the air gap between the rotor iron sheet 13b on the other side and the magnetic conduction upright post 12a, so that a magnetic loop is formed. The mover insertion 13 is accelerated forward by the forward magnetic force. When the rotor weft insertion piece 13 is required to perform decelerating motion, the power is supplied to the electromagnet coils 11 of the next group at a proper position, and the rotor weft insertion piece 13 performs decelerating motion under the action of rear magnetic force. By utilizing the motion principle, the magnetic conduction upright posts 12 and the electromagnet coils 11 with the number corresponding to the fabric width are designed, and the corresponding control circuit is designed, so that the required weft insertion device can be realized.
The magnetic suspension weft insertion device has the following structural advantages:
1. simple structure, easy to assemble can design loom weaving width of width as required.
2. The gravity of the weft insertion sheet is overcome by utilizing magnetic force, the friction resistance between the weft insertion sheet and the track is reduced, the energy consumption in the weft insertion process is reduced, and the service life of the weft insertion sheet is prolonged.
Claims (9)
1. A variable reluctance magnetic levitation weft insertion device characterized in that it has: an electromagnetic component and an electromagnetic controller for controlling the electromagnetic component to be powered on and powered off; wherein,
the electromagnetic assembly comprises an electromagnet coil, a magnetic conduction upright post and a rotor weft insertion piece which is erected at the top of the magnetic conduction upright post;
the electromagnet coils are arranged in a plurality of straight lines, and each electromagnet coil consists of an internal iron core and coils wound on the periphery of the iron core;
the number of the magnetic conduction upright posts is matched with that of the electromagnet coils, the magnetic conduction upright posts are also arranged in a straight line, each magnetic conduction upright post is provided with a pair of upright posts which are arranged in opposite directions, and the tops of the two upright posts extend in opposite directions to form a horizontal magnetic suspension track;
the rotor weft insertion sheet consists of a wear-resistant shell and a rotor iron sheet embedded on the wear-resistant shell;
the electromagnet coil is clamped between the magnetic conduction upright posts, and the two ends of the iron core of the electromagnet coil and the magnetic conduction upright posts are of an integrated structure or are in close contact connection without an air gap;
the iron sheet of the rotor weft insertion sheet has a contour shape gradually changing from big to small with an air gap formed between the iron sheet and the end parts of the upright posts forming the magnetic levitation track, and the contour shape adopts an arc shape or an oblique line shape.
2. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the magnetic suspension track is a chute formed at the tops of the two upright posts in opposite directions and comprises a first chute used for accommodating one side of the rotor weft insertion sheet and a second chute used for accommodating the other side of the rotor weft insertion sheet, and the first chute and the second chute are oppositely constructed into a horizontal magnetic suspension track at the top of the electromagnet coil.
3. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the wear-resistant shell of the rotor weft insertion piece is made of light wear-resistant materials.
4. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the rotor iron sheet and the magnetic conduction upright post of the rotor weft insertion sheet are made of materials with high magnetic conductivity, high magnetic flux density, low coercive force and low loss.
5. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the shell of the rotor weft insertion piece adopts a strip-shaped sheet structure, and the installation positions and the installation quantity of the rotor iron pieces on the shell are matched according to actual requirements.
6. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the rotor iron sheet of the rotor weft insertion sheet is provided with a hollowed-out part.
7. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the electromagnet coil and the magnetic conduction stand column are fixedly arranged on the base.
8. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the number of the electromagnet coils and the magnetic conduction upright posts is set according to the width requirement of the fabric door.
9. A variable reluctance magnetic levitation weft insertion device according to claim 1,
the electromagnetic controller is electrically connected with the corresponding electromagnet coils through a plurality of wires respectively, and the electrifying control modes of the electromagnetic controller on different electromagnet coils are specifically adapted and adjusted by combining the number of the electromagnet coils and the number and the shape of the rotor iron sheets in the rotor weft insertion sheets.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856310.6A CN110485035B (en) | 2019-09-11 | 2019-09-11 | Magnetic suspension weft insertion device with variable magnetic resistance |
| PCT/CN2020/079202 WO2021047157A1 (en) | 2019-09-11 | 2020-03-13 | Variable magnetic reluctance magnetic levitation weft insertion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856310.6A CN110485035B (en) | 2019-09-11 | 2019-09-11 | Magnetic suspension weft insertion device with variable magnetic resistance |
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| Publication Number | Publication Date |
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| CN110485035A CN110485035A (en) | 2019-11-22 |
| CN110485035B true CN110485035B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910856310.6A Active CN110485035B (en) | 2019-09-11 | 2019-09-11 | Magnetic suspension weft insertion device with variable magnetic resistance |
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| CN (1) | CN110485035B (en) |
| WO (1) | WO2021047157A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485035B (en) * | 2019-09-11 | 2024-04-02 | 宋怡佳 | Magnetic suspension weft insertion device with variable magnetic resistance |
| CN114164542A (en) * | 2021-12-15 | 2022-03-11 | 国网江苏省电力有限公司南通供电分公司 | Magnetic suspension weft laying mechanism of tube weaving machine |
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| DE102009019935A1 (en) * | 2009-05-05 | 2009-11-19 | Konrad, Hilmar, Dipl.-Ing. | Projectile loom for weaving weft threads into fabric, has weft insertion device including acceleration- and/or braking device that works according electromagnetic coil gun-principle and accelerates and/or brakes weft insertion projectile |
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| CN106012242A (en) * | 2015-03-31 | 2016-10-12 | 意达股份公司 | Electromagnetic device for the insertion of the weft yarns into a projectile weaving loom |
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| CN106592067A (en) * | 2016-12-30 | 2017-04-26 | 武汉纺织大学 | Electromagnetic launching device and method for weft insertion of ultra-wide loom |
| CN210975019U (en) * | 2019-09-11 | 2020-07-10 | 宋怡佳 | Variable magnetic resistance magnetic suspension weft insertion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0172096B1 (en) * | 1996-08-21 | 1999-02-18 | 이동원 | Device for a guide weft for loom |
| US6948530B2 (en) * | 2004-01-02 | 2005-09-27 | Yi-Shan Yao | Weaving machine |
| CN110209069B (en) * | 2019-06-28 | 2020-03-31 | 武汉纺织大学 | Magnetic levitation gripper precise weft insertion control method and system and information processing terminal |
| CN110485035B (en) * | 2019-09-11 | 2024-04-02 | 宋怡佳 | Magnetic suspension weft insertion device with variable magnetic resistance |
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2019
- 2019-09-11 CN CN201910856310.6A patent/CN110485035B/en active Active
-
2020
- 2020-03-13 WO PCT/CN2020/079202 patent/WO2021047157A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438372A (en) * | 2002-02-15 | 2003-08-27 | 株式会社丰田自动织机 | Electromagnetic driving apparatus for controlling weft-guide in loom |
| CN1865561A (en) * | 2006-03-28 | 2006-11-22 | 兰州理工大学 | Shuttle guiding device of braiding machine and power-on method for coil |
| DE102009019935A1 (en) * | 2009-05-05 | 2009-11-19 | Konrad, Hilmar, Dipl.-Ing. | Projectile loom for weaving weft threads into fabric, has weft insertion device including acceleration- and/or braking device that works according electromagnetic coil gun-principle and accelerates and/or brakes weft insertion projectile |
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| CN106012242A (en) * | 2015-03-31 | 2016-10-12 | 意达股份公司 | Electromagnetic device for the insertion of the weft yarns into a projectile weaving loom |
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Also Published As
| Publication number | Publication date |
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| CN110485035A (en) | 2019-11-22 |
| WO2021047157A1 (en) | 2021-03-18 |
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