CN111646272A - Metal winding gasket loading attachment - Google Patents
Metal winding gasket loading attachment Download PDFInfo
- Publication number
- CN111646272A CN111646272A CN202010360924.8A CN202010360924A CN111646272A CN 111646272 A CN111646272 A CN 111646272A CN 202010360924 A CN202010360924 A CN 202010360924A CN 111646272 A CN111646272 A CN 111646272A
- Authority
- CN
- China
- Prior art keywords
- raw material
- cutting
- metal
- roller
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/02—Advancing webs by friction roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/26—Cutting-off the web running to the wound web roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/29—Securing the trailing end of the wound web to the web roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
- B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a metal winding gasket feeding device which comprises a raw material traction mechanism, a raw material cutting mechanism, a material receiving roller and an electric welding machine, wherein the raw material traction mechanism is arranged on the raw material cutting mechanism; the raw material traction mechanism comprises a driving roller, an auxiliary roller and a driving incomplete gear, the driving roller is coaxially connected with a driven gear, and the driving incomplete gear is intermittently meshed with the driven gear; the raw material cutting mechanism comprises a driving incomplete gear and a slider-crank mechanism, and a cutting knife for cutting is arranged in the slider-crank mechanism; the raw material traction mechanism intermittently pulls the raw material, and the cutting mechanism cuts the raw material during the pause period of the raw material traction mechanism; and the material receiving roller is used for rolling, rolling and cutting the raw material, and the electric welding machine is used for spot welding the raw material on the material receiving roller. Intermittently drawing the raw material by a raw material drawing mechanism, and cutting the raw material by a cutting mechanism during the pause period of the raw material drawing mechanism; the material receiving roller is used for rolling, rolling and cutting the raw materials, the electric welding machine is used for spot welding the raw materials on the material receiving roller, and the ejection sleeve is used for ejecting the wound gaskets on the material receiving roller after spot welding, so that the wound gaskets are fed one by one.
Description
Technical Field
The invention relates to the technical field of tool machining equipment, in particular to a metal winding gasket feeding device.
Background
The metal wound gasket is a gasket which is widely applied at present and has the best rebound resilience in a semi-metal sealing gasket, is formed by alternately winding a V-shaped or W-shaped thin steel strip and various fillers, can resist high temperature and high pressure and is suitable for being used under the conditions of ultralow temperature or vacuum, can solve the problem of chemical corrosion of various media to the gasket by changing the material combination of the gasket, can be manufactured according to different locking force requirements in structural density, and can be formed by alternately winding the V-shaped or W-shaped thin steel strip and various fillers for strengthening a main body and accurately positioning. The existing winding feeding method is manual feeding, so that the danger is too high, and the efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a metal winding gasket feeding device, wherein a raw material traction mechanism intermittently pulls raw materials, and a cutting mechanism cuts the raw materials during the pause of the raw material traction mechanism; the material receiving roller is used for rolling, rolling and cutting the raw materials, the electric welding machine is used for spot welding the raw materials on the material receiving roller, and the ejection sleeve is used for ejecting the wound gaskets on the material receiving roller after spot welding, so that the wound gaskets are fed one by one.
In order to solve the technical problem, the invention is solved by the following technical scheme: a metal winding gasket feeding device comprises a box body, wherein a raw material supporting seat is arranged on the box body, and the metal winding gasket feeding device also comprises a raw material traction mechanism, a raw material cutting mechanism, a material receiving roller and an electric welding machine; the raw material traction mechanism comprises a driving roller, an auxiliary roller and a driving incomplete gear, the driving roller is coaxially connected with a driven gear, and the driving incomplete gear is intermittently meshed with the driven gear; the raw material cutting mechanism comprises the driving incomplete gear and a slider-crank mechanism, the slider-crank mechanism is eccentrically arranged on the driving incomplete gear, and a cutting knife for cutting is arranged in the slider-crank mechanism; the raw material traction mechanism intermittently pulls raw materials, and the cutting mechanism cuts the raw materials during the pause period of the raw material traction mechanism; the material receiving roller is used for rolling, rolling and cutting the raw materials, and the electric welding machine is used for spot welding the raw materials on the material receiving roller.
Further preferably, the crank-slider mechanism comprises a connecting rod, a slider and a slideway; the slider articulates the one end of connecting rod, the one end of connecting rod is equipped with eccentric pivot, eccentric pivot eccentric settings is in on the incomplete gear of initiative, the one end of slider is equipped with the cutting knife, the slide restricts the slider only lateral shifting.
Further optimizing, still include ejecting the cover, ejecting cover with the receipts material roller sets up relatively for ejecting the raw materials after spot welding on the receipts material roller one by one.
Further optimizing, still be equipped with the supplementary guide pin bushing that is used for supplementary raw materials feeding on the box.
Further optimize, the raw materials supporting seat includes metal raw materials supporting seat, non-metal materials supporting seat, just metal raw materials supporting seat, non-metal materials supporting seat are located the both sides of supplementary guide pin bushing.
Further optimize, still include dual output shaft motor, one of them output shaft and the incomplete gear coaxial coupling of initiative, another output shaft is connected with eccentric rotating shaft, the receipts material roller is connected with the motor.
Further preferably, the auxiliary guide sleeve is provided with a V-shaped groove, and a switch for controlling a motor and a time delay switch for controlling an electric welding machine are arranged in the V-shaped groove.
Further optimization, the delay time of the delay switch can be calculated according to the rotating speed of the motor and the perimeter of the required wound gasket.
The invention has the beneficial effects that:
1. the metal raw materials and the nonmetal raw materials are respectively placed on the metal raw material supporting seat and the nonmetal raw material supporting seat, and then the metal raw materials and the nonmetal raw materials are combined together by matching with the auxiliary roller under the driving of the driving roller.
2. Adopt the cooperation of initiative incomplete gear and driven gear, raw materials drive mechanism pause when the scarce tooth portion of initiative incomplete gear and driven gear meshing stops the material loading, raw materials cutting mechanism cuts the raw materials this moment, cut off the switch of cutting knife touch control receipts material roller motor and the delay switch of electric welding when cutting off, the raw materials that the receipts material roller pair was cut off carry out the rolling, the electric welding time delay carries out spot welding to the raw materials that the rolling is good, ejecting cover carries out ejecting collection with the raw materials that the spot welding is good, accomplish the material loading of a metal winding gasket. Then the toothed part of the driving incomplete gear and the driven gear are meshed with a raw material traction mechanism to continue feeding. The automatic processing device can replace manual feeding in the prior art, and greatly improves the production efficiency.
3. The device of the invention is adopted to feed the metal winding gasket, the circumference of the circular arc where the toothed part of the driving incomplete gear is positioned is the length of raw materials required by the metal winding gasket, and the metal winding gasket with different radiuses can be manufactured by automatically setting the circular arc length of the toothed part of the driving incomplete gear and the radius of the material receiving roller.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will discuss the drawings required to be used in the embodiments or the technical solutions in the prior art, it is obvious that the technical solutions described in the figures are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings thereof can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is a schematic axial view of a metal wound gasket feeding apparatus of the present invention.
FIG. 2 is a schematic view of the inner shaft side of a metal wound gasket feeding apparatus of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a left side view of the present invention.
Fig. 5 is an enlarged view of a portion a in fig. 3.
In the figure: the automatic feeding device comprises a box body 1, a non-metal raw material supporting seat 2, a metal raw material supporting seat 3, a driving roller 4, an auxiliary roller 5, a raw material 6, a slideway 7, an auxiliary guide sleeve 8, an eccentric rotating shaft 9, a V-shaped groove 10, a connecting rod 11, a sliding block 12, a receiving roller 13, an electric welding machine 14, a driven gear 15, a driving incomplete gear 16, an ejection sleeve 17, a first motor shaft sleeve 18 and a second motor shaft sleeve 19.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention.
The embodiment of the invention provides a metal winding gasket feeding device, which comprises a box body 1, a raw material supporting seat, a raw material traction mechanism, a raw material cutting mechanism, a material receiving roller 13 and an electric welding machine 14, wherein the box body 1 is provided with the raw material supporting seat; the raw material traction mechanism comprises a driving roller 4, an auxiliary roller 5 and a driving incomplete gear 16, wherein the driving roller 4 is coaxially connected with a driven gear 15, and the driving incomplete gear 16 is intermittently meshed with the driven gear 15; the raw material cutting mechanism comprises the driving incomplete gear 16 and a slider-crank mechanism, the slider-crank mechanism is eccentrically arranged on the driving incomplete gear 16, and a cutting knife for cutting is arranged in the slider-crank mechanism; the raw material traction mechanism intermittently pulls the raw material, and the cutting mechanism cuts the raw material 6 during the pause period of the raw material traction mechanism; the material receiving roller 13 is used for rolling, rolling and cutting the raw materials 6, and the electric welding machine 14 is used for spot welding the raw materials 6 on the material receiving roller 13.
The crank sliding block mechanism comprises a connecting rod 11, a sliding block 12 and a slideway 7; slider 12 articulates the one end of connecting rod 11, the other end of connecting rod 11 is equipped with eccentric pivot 9, eccentric pivot 9 eccentric settings is in on the incomplete gear 16 of initiative, the one end of slider 12 is equipped with the cutting knife, slide 7 restricts slider 12 only lateral shifting. Wherein the slideway 7 corresponds to a frame in a slider-crank mechanism.
The material receiving roller 13 is characterized by further comprising an ejection sleeve 17, wherein the ejection sleeve 17 is arranged opposite to the material receiving roller 13 and used for ejecting the spot-welded raw materials 6 on the material receiving roller 13 one by one. Wherein the ejection sleeve 17 can be driven by hydraulic pressure or pneumatic pressure.
And an auxiliary guide sleeve 8 for feeding the auxiliary raw material 6 is also arranged on the box body 1.
The raw material supporting seat comprises a metal raw material supporting seat 3 and a nonmetal raw material supporting seat 2, and the metal raw material supporting seat 3 and the nonmetal raw material supporting seat 2 are located on two sides of the auxiliary guide sleeve 8. Wherein metal feedstock 6 and non-metal raw materials 6 are placed respectively on metal feedstock supporting seat 3 and non-metal raw materials supporting seat 2, and metal feedstock supporting seat 3 and non-metal raw materials supporting seat 2 pass through bearing roll connection on the lateral wall of box 1.
Still include dual output shaft motor, dual output shaft motor is equipped with first motor shaft sleeve 18 and second motor shaft sleeve 19, first motor shaft sleeve 18 and the incomplete gear 16 coaxial coupling of initiative, and second motor shaft sleeve 19 is connected with eccentric pivot 9, receipts material roller 13 is connected with the motor.
And a V-shaped groove 10 is formed in the auxiliary guide sleeve 8, and a switch for controlling a motor and a time delay switch for controlling the electric welding machine 14 are arranged in the V-shaped groove 10.
The delay time of the delay switch can be calculated according to the rotating speed of the motor and the perimeter of the wound gasket.
The method comprises the following specific operation steps: and starting the double-output motor, driving the incomplete gear 16 to rotate by the first motor shaft sleeve 18, driving the driven gear 15 to rotate due to the meshing of the incomplete gear 16 and the driven gear 15, rotating the driving roller 4, and driving the driving roller 4 to rotate and pull the metal and non-metal raw materials 6 to be loaded from the corresponding supporting seat, wherein the metal and non-metal raw materials 6 are overlapped and enter the position of the material receiving roller 13 under the action of the auxiliary guide sleeve 8.
Then when the tooth-lacking part of the driving incomplete gear 16 is meshed with the driven gear 15, the driven gear 15 does not rotate, and further the driving roller 4 does not rotate, so that the raw material 6 is dragged and stopped; meanwhile, the second motor shaft sleeve 19 drives the eccentric rotating shaft 9 to start to move to the forward limit position (the left side direction in a specified graph is forward, and the right side direction in the specified graph is reverse), the sliding block 12 and the cutting knife are driven to move towards the direction of the raw material 6, namely the forward limit position of the crank sliding block mechanism moves at the moment, when the crank sliding block mechanism moves to the limit position, the cutting knife cuts the raw material 6, the cutting knife can trigger the motor for controlling the material receiving roller 13 to start and the electric welding machine 14 to delay to start at the same time of cutting, so that the material receiving roller 13 is driven to rotate, the cut raw material 6 is wound, then the electric welding machine 14 performs spot welding, and finally the ejection sleeve 17 ejects a winding gasket which is subjected to spot welding on the material receiving roller 13, so that the loading of a metal winding gasket can be completed.
When the toothed part of the driving incomplete gear 16 is meshed with the driven gear 15, the driven gear 15 rotates, and further the driving roller 4 starts to rotate, so that the raw material 6 is dragged to start again, and meanwhile, the eccentric rotating shaft 9 starts to move to the reverse limit position to drive the sliding block 12 and the cutting knife to move away from the raw material 6, and therefore the motor of the material receiving roller 13 is controlled to be turned off and the electric welding machine 14 is controlled to pause to work.
The circumference of the arc where the toothed part of the driving incomplete gear 16 is located is the length of the raw material 6 required by one metal winding gasket, and the metal winding gaskets with different radiuses can be manufactured by setting the arc length of the toothed part of the driving incomplete gear 16 and the radius of the material receiving roller 13 according to the requirement.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a metal winding gasket loading attachment, includes the box, be equipped with raw materials supporting seat on the box, its characterized in that: the device also comprises a raw material traction mechanism, a raw material cutting mechanism, a material receiving roller and an electric welding machine; the raw material traction mechanism comprises a driving roller, an auxiliary roller and a driving incomplete gear, the driving roller is coaxially connected with a driven gear, and the driving incomplete gear is intermittently meshed with the driven gear; the raw material cutting mechanism comprises the driving incomplete gear and a slider-crank mechanism, the slider-crank mechanism is eccentrically arranged on the driving incomplete gear, and a cutting knife for cutting is arranged in the slider-crank mechanism; the raw material traction mechanism intermittently pulls raw materials, and the cutting mechanism cuts the raw materials during the pause period of the raw material traction mechanism; the material receiving roller is used for rolling, rolling and cutting the raw materials, and the electric welding machine is used for spot welding the raw materials on the material receiving roller.
2. The metal wound gasket feed apparatus of claim 1, wherein: the crank sliding block mechanism comprises a connecting rod, a sliding block and a slideway; the slider articulates the one end of connecting rod, the one end of connecting rod is equipped with eccentric pivot, eccentric pivot eccentric settings is in on the incomplete gear of initiative, the one end of slider is equipped with the cutting knife, the slide restricts the slider only lateral shifting.
3. The metal wound gasket feed apparatus of claim 1, wherein: the material receiving roller is arranged on the base, and the material receiving roller is arranged on the base and used for receiving materials to be spot-welded.
4. The metal wound gasket feed apparatus of claim 1, wherein: and the box body is also provided with an auxiliary guide sleeve for assisting raw material feeding.
5. The metal wound gasket feeding apparatus of claim 4, wherein: the raw material supporting seat comprises a metal raw material supporting seat and a non-metal raw material supporting seat, and the metal raw material supporting seat and the non-metal raw material supporting seat are located on two sides of the auxiliary guide sleeve.
6. The metal wound gasket feed apparatus of claim 2, wherein: still include dual output shaft motor, one of them output shaft and the incomplete gear coaxial coupling of initiative, another output shaft is connected with eccentric rotating shaft, it is connected with the motor to receive the material roller.
7. The metal wound gasket feed apparatus of claim 6, wherein: and a V-shaped groove is formed in the auxiliary guide sleeve, and a switch for controlling a motor and a time delay switch for controlling an electric welding machine are arranged in the V-shaped groove.
8. The metal wound gasket feed apparatus of claim 7, wherein: the delay time of the delay switch can be calculated according to the rotating speed of the motor and the perimeter of the wound gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360924.8A CN111646272B (en) | 2020-04-30 | 2020-04-30 | Metal winding gasket loading attachment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360924.8A CN111646272B (en) | 2020-04-30 | 2020-04-30 | Metal winding gasket loading attachment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111646272A true CN111646272A (en) | 2020-09-11 |
| CN111646272B CN111646272B (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010360924.8A Active CN111646272B (en) | 2020-04-30 | 2020-04-30 | Metal winding gasket loading attachment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111646272B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353680A (en) * | 2021-05-12 | 2021-09-07 | 利辛县富亚纱网有限公司 | Auxiliary device for gauze |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2593925Y (en) * | 2002-12-24 | 2003-12-24 | 周怀林 | Packing winder |
| CN202156838U (en) * | 2011-06-30 | 2012-03-07 | 邓方乔 | Twisting machine for minisize metal twisting washer |
| CN104209367A (en) * | 2014-08-21 | 2014-12-17 | 张家港市翔宇化工建材有限公司 | Automatic gasket winding machine |
| CN204300355U (en) * | 2014-12-10 | 2015-04-29 | 陈石鸣 | Pad winding machine |
| CN105593011A (en) * | 2013-07-26 | 2016-05-18 | Ra投资管理有限公司 | Metal and graphite laminate |
| CN206720504U (en) * | 2017-03-22 | 2017-12-08 | 慈溪市宝翔机械有限公司 | The numerical control winding machine of gasket seal automatic charging |
| CN207213143U (en) * | 2017-09-05 | 2018-04-10 | 宜昌恒升密封材料有限公司 | A kind of wind of Graphite pad |
| CN107902447A (en) * | 2017-12-21 | 2018-04-13 | 重庆馨康阁科技有限公司 | Medical high polymer plate stacking adapter |
| CN109051981A (en) * | 2018-08-31 | 2018-12-21 | 重庆市开州区三中印务有限公司 | Folding apparatus is used in printing |
| CN208811528U (en) * | 2019-01-08 | 2019-05-03 | 山东宏邦流体控制技术有限公司 | A kind of valve Graphite pad machine |
-
2020
- 2020-04-30 CN CN202010360924.8A patent/CN111646272B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2593925Y (en) * | 2002-12-24 | 2003-12-24 | 周怀林 | Packing winder |
| CN202156838U (en) * | 2011-06-30 | 2012-03-07 | 邓方乔 | Twisting machine for minisize metal twisting washer |
| CN105593011A (en) * | 2013-07-26 | 2016-05-18 | Ra投资管理有限公司 | Metal and graphite laminate |
| CN104209367A (en) * | 2014-08-21 | 2014-12-17 | 张家港市翔宇化工建材有限公司 | Automatic gasket winding machine |
| CN204300355U (en) * | 2014-12-10 | 2015-04-29 | 陈石鸣 | Pad winding machine |
| CN206720504U (en) * | 2017-03-22 | 2017-12-08 | 慈溪市宝翔机械有限公司 | The numerical control winding machine of gasket seal automatic charging |
| CN207213143U (en) * | 2017-09-05 | 2018-04-10 | 宜昌恒升密封材料有限公司 | A kind of wind of Graphite pad |
| CN107902447A (en) * | 2017-12-21 | 2018-04-13 | 重庆馨康阁科技有限公司 | Medical high polymer plate stacking adapter |
| CN109051981A (en) * | 2018-08-31 | 2018-12-21 | 重庆市开州区三中印务有限公司 | Folding apparatus is used in printing |
| CN208811528U (en) * | 2019-01-08 | 2019-05-03 | 山东宏邦流体控制技术有限公司 | A kind of valve Graphite pad machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353680A (en) * | 2021-05-12 | 2021-09-07 | 利辛县富亚纱网有限公司 | Auxiliary device for gauze |
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| Publication number | Publication date |
|---|---|
| CN111646272B (en) | 2022-04-01 |
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