CN112277297B - Dust mask flattening device - Google Patents
Dust mask flattening device Download PDFInfo
- Publication number
- CN112277297B CN112277297B CN202010981909.5A CN202010981909A CN112277297B CN 112277297 B CN112277297 B CN 112277297B CN 202010981909 A CN202010981909 A CN 202010981909A CN 112277297 B CN112277297 B CN 112277297B
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- Prior art keywords
- sliding
- rack
- frame
- rail
- flattening
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/16—Straightening or flattening
- B29C53/18—Straightening or flattening of plates or sheets
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41H—APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
- A41H43/00—Other methods, machines or appliances
- A41H43/02—Handling garment parts or blanks, e.g. feeding, piling, separating or reversing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4807—Headwear
- B29L2031/4835—Masks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
The invention relates to a flattening device, in particular to a flattening device for a dust mask. The dustproof mask flattening device can replace manual work to flatten the dustproof mask, and is high in working efficiency and good in quality. A dust mask flattening device comprises: a frame; the driving mechanism is arranged on the rack and is driven in a rotating mode; the movable flattening mechanism is arranged on the rack and is used for flattening in a sliding mode; and the lifting mechanism is arranged on the rack and can lift in a sliding mode. According to the invention, power can be provided when the dustproof mask is leveled through the driving mechanism, the working efficiency of people is improved, the movable leveling mechanism can replace manpower to level the dustproof mask, a large amount of manpower is saved, the working efficiency of people is improved, the lifting mechanism can level the dustproof mask, the working quality of people is improved, and people can take off the dustproof mask more conveniently through the second gear and the second rack.
Description
Technical Field
The invention relates to a flattening device, in particular to a flattening device for a dust mask.
Background
The dust mask is used for preventing or reducing dust from entering respiratory organs of a human body. The outer layer of the dust mask usually accumulates dust, bacteria and other dirt in the outside air, and the inner layer blocks exhaled bacteria and saliva, so that the two surfaces cannot be used alternately, otherwise, the dirt stained on the outer layer can be directly attached to the face and is inhaled into the human body to form an infection source. After the production of the dust mask is finished, the dust mask needs to be leveled.
At present, people generally carry out the flattening through the manual work when leveling to dust mask, and this kind of mode of carrying out the flattening through the manual work need consume great manpower, has reduced people's work efficiency, and this kind of mode of carrying out the flattening through the manual work can not be with leveling more that dust mask pressed to people's operating mass has been reduced.
Therefore, it is necessary to design a device for leveling a dust mask, which can replace manual work to level the dust mask, and has high working efficiency and good quality.
Disclosure of Invention
In order to overcome the defects of manual leveling, low working efficiency and poor quality, the technical problem is that: the dustproof mask flattening device can replace manual work to flatten the dustproof mask, and is high in working efficiency and good in quality.
The technical scheme is as follows: a dust mask flattening device comprises: a frame; the driving mechanism is arranged on the rack and is driven in a rotating mode; the movable flattening mechanism is arranged on the rack and is used for flattening in a sliding mode; and the lifting mechanism is arranged on the rack and can lift in a sliding mode.
Preferably, the drive mechanism includes: the speed reducing motor is arranged on the rack; the first gear is arranged on an output shaft of the speed reducing motor; the guide rail is arranged on the frame; the first rack is arranged in the guide rail and meshed with the first gear.
Preferably, the movable flattening mechanism comprises: the first mounting rack is mounted on the rack; the rhombic column is rotatably mounted on the first mounting frame; the sliding sleeve is slidably mounted on the rhombic column and connected with the first rack; the telescopic rod is arranged on the sliding sleeve; the connecting rod is arranged on the telescopic rod; the first spring is arranged between the connecting rod and the telescopic rod and is in a stretching state; and the cylinder is arranged on the connecting rod.
Preferably, the elevating mechanism includes: the special-shaped block is arranged on the frame; the sliding plate is arranged on the frame in a sliding manner; at least two protruding columns are arranged on the sliding plate; two stop blocks are arranged on the frame; the two connecting frames are arranged and are arranged on the stop block in a sliding manner; two second springs are arranged and are arranged between the connecting frame and the stop block; the contact plate is arranged between the two stop blocks; and the contact frame is arranged on the cylinder and matched with the contact plate.
Preferably, the method further comprises the following steps: the first fixing frame is arranged on the rack; the first sliding rail is arranged on the first fixing frame; the sliding rod is arranged on the contact frame and is in sliding fit with the first sliding rail; the shaft sleeve is rotatably arranged on the sliding sleeve; the wedge block is arranged on the shaft sleeve; the second gear is arranged on the rhombic column; the second mounting rack is mounted on the rack; the second sliding rail is arranged on the second mounting rack; the second rack is slidably mounted on the second sliding rail and meshed with the second gear; the sliding frame is arranged on the second sliding rail in a sliding mode and is connected with the second rack; and the third spring is arranged between the sliding frame and the second sliding rail.
Preferably, the method further comprises the following steps: the second fixing frame is arranged on the rack; the third slide rail is arranged on the second fixed frame; the third fixing frame is arranged on the first sliding rail; the fixed pulley is arranged on the third fixing frame; the first sliding block is arranged on the first sliding rail in a sliding manner; the second sliding block is arranged in the third sliding rail in a sliding manner; the return spring is arranged between the second sliding block and the third sliding rail; the pull wire is arranged on the second sliding block and connected with the first sliding block by winding the fixed pulley; and the pushing frame is arranged on the second sliding block.
The invention has the beneficial effects that: according to the invention, power can be provided when the dustproof mask is leveled through the driving mechanism, the work efficiency of people is improved, the movable leveling mechanism can replace manpower to level the dustproof mask, a large amount of manpower is saved, the work efficiency of people is improved, the lifting mechanism can level the dustproof mask, the work quality of people is improved, people can take off the dustproof mask more conveniently through the second gear and the second rack, manual collection is not needed any more after the dustproof mask is leveled through the push frame, a large amount of manpower is saved, and the work efficiency of people is improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the driving mechanism of the present invention.
Fig. 3 is a schematic perspective view of the movable platen mechanism of the present invention.
Fig. 4 is a schematic perspective view of the lifting mechanism of the present invention.
FIG. 5 is a schematic view of a first partial body structure according to the present invention.
FIG. 6 is a schematic view of a second partial body structure according to the present invention.
Description of reference numerals: 1_ frame, 2_ drive mechanism, 21_ reduction motor, 22_ first gear, 23_ guide, 24_ first rack, 3_ moving flattening mechanism, 31_ first mounting frame, 32_ diamond column, 33_ sliding sleeve, 34_ telescopic rod, 35_ connecting rod, 36_ first spring, 37_ cylinder, 4_ lifting mechanism, 41_ special-shaped block, 42_ sliding plate, 43_ protruding column, 44_ connecting frame, 45_ second spring, 46_ stopper, 47_ contact plate, 48_ contact frame, 5_ first fixing frame, 6_ first sliding rail, 7_ sliding rod, 8_ shaft sleeve, 9_ wedge block, 10_ second gear, 11_ second mounting frame, 12_ second sliding rail, 13_ second rack, 14_ carriage, 15_ third spring, 16_ second fixing frame, 17_ third sliding rail, 18_ third fixing frame, 19_ fixed pulley, 191_ first sliding block, 192_ second sliding block, 1921_ reset spring, 193_ pull wire, 194_ push frame.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.
Example 1
A dust mask flattening device is shown in figures 1-6 and comprises a rack 1, a driving mechanism 2, a movable flattening mechanism 3 and a lifting mechanism 4, wherein the driving mechanism 2 driven in a rotating mode is arranged on the rack 1, the movable flattening mechanism 3 flattened in a sliding mode is arranged on the rack 1, and the lifting mechanism 4 is arranged on the rack 1 in a sliding mode.
When using the device, the staff will need to carry out the dust mask of flattening and put to elevating system 4 on, put the back, the staff starts actuating mechanism 2 and drives and remove flattening mechanism 3 and remove to flatten dust mask, accomplishes the back, and the staff closes actuating mechanism 2, takes out the dust mask after the flattening afterwards, so, makes things convenient for people to use more.
As shown in fig. 1, 2 and 3, the driving mechanism 2 includes a speed reduction motor 21, a first gear 22, a guide rail 23 and a first rack 24, the speed reduction motor 21 is fixedly connected to the front portion of the right side of the frame 1 through a bolt, the first gear 22 is connected to an output shaft of the speed reduction motor 21 in a key manner, the guide rail 23 is welded to the front portion of the right side of the frame 1, the first rack 24 is arranged in the guide rail 23 in a sliding manner, and the first rack 24 is engaged with the first gear 22.
When leveling dust mask, the staff starts gear motor 21 and drives first gear 22 and rotate to drive first rack 24 and slide forward on guide rail 23, and then drive and remove flattening mechanism 3 and move forward and carry out the flattening to dust mask, accomplish the back, the staff closes gear motor 21, takes off dust mask after the flattening afterwards, so, can provide power when flattening dust mask, improved people's work efficiency.
As shown in fig. 1, fig. 3, fig. 4 and fig. 5, the movable flattening mechanism 3 includes a first mounting frame 31, a diamond-shaped column 32, a sliding sleeve 33, an expansion link 34, a connecting rod 35, a first spring 36 and a cylinder 37, the first mounting frame 31 is welded on the right front side of the upper portion of the rack 1, the diamond-shaped column 32 is rotatably arranged on the first mounting frame 31, the sliding sleeve 33 is slidably arranged on the diamond-shaped column 32, the sliding sleeve 33 is connected with the first gear 24, the expansion link 34 is arranged on the sliding sleeve 33, the connecting rod 35 is arranged at the top end of the expansion link 34, the first spring 36 is connected between the connecting rod 35 and the expansion link 34 in a winding manner, the first spring 36 is in a stretching state, and the cylinder 37 is arranged on the left side of the connecting rod 35.
When leveling dust mask, first rack 24 slides forward and drives sliding sleeve 33 and slide forward on rhombus post 32, telescopic link 34 drives drum 37 through connecting rod 35 and moves forward thereupon, move forward to the back that breaks away from with elevating system 4 when connecting rod 35, under the effect that first spring 36 resets, telescopic link 34 contracts thereupon and drives drum 37 and move down through connecting rod 35, thereby carry out the flattening to dust mask, so, can replace the manual work to carry out the flattening to dust mask, a large amount of manpowers have been saved, people's work efficiency has been improved.
As shown in fig. 1, 4 and 5, the lifting mechanism 4 includes a special-shaped block 41, a sliding plate 42, protruding columns 43, a connecting frame 44, second springs 45, stoppers 46, a contact plate 47 and a contact frame 48, the special-shaped block 41 is welded at the rear part of the right side of the rack 1, the sliding plate 42 is slidably arranged on the rack 1, eight rows of protruding columns 43 are arranged on the sliding plate 42, the stoppers 46 are welded at the front and rear parts of the left side of the rack 1, the connecting frame 44 is slidably arranged on the stoppers 46, the connecting frame 44 is connected with the sliding plate 42, the second springs 45 are wound between the connecting frame 44 and the stoppers 46, the contact plate 47 is fixedly connected between the tops of the front and rear stoppers 46 through bolts, the contact frame 48 is welded at the left side of the cylinder 37, and the contact frame 48 is matched with the contact plate 47.
When leveling dust mask, the staff puts the dust mask that needs to carry out the flattening to slide 42 on, put the back, connecting rod 35 drives drum 37 and moves forward, when connecting rod 35 forward move to break away from the back with dysmorphism piece 41, telescopic link 34 shrink drives drum 37 and moves down, contact frame 48 moves down thereupon and promotes contact plate 47 and moves down, link 44 drives slide 42 and moves down thereupon, abrupt post 43 moves down thereupon, second spring 45 is tensile, afterwards, drum 37 moves forward and levels dust mask, after the completion, the staff takes off the gauze mask after the flattening, so, can carry out the flattening to dust mask, people's operating mass is improved.
Example 2
On the basis of embodiment 1, as shown in fig. 1 and 5, the sliding rack further comprises a first fixing frame 5, a first sliding rail 6, a sliding rod 7, a shaft sleeve 8, a wedge 9, a second gear 10, a second mounting frame 11, a second sliding rail 12, a second rack 13, a sliding frame 14 and a third spring 15, the first fixing frame 5 is welded on the upper portion of the front side of the rack 1, the first sliding rail 6 is fixedly connected to the first fixing frame 5 through bolts, the sliding rod 7 is arranged on a contact frame 48, the sliding rod 7 is in sliding fit with the first sliding rail 6, the shaft sleeve 8 is arranged on the outer side of the sliding sleeve 33, the wedge 9 is welded on the lower portion of the shaft sleeve 8, the second gear 10 is connected to the front portion of the rhombic column 32 in a key manner, the second mounting frame 11 is welded on the upper portion of the front side of the rack 1, the second sliding frame 11 is fixedly connected to the second sliding rail 12 through bolts, the second sliding rail 12 is provided with a second rack 13 in a sliding manner, the second rack 13 is engaged with the second gear 10, the second sliding frame 14 is arranged behind the second sliding rail 12, the carriage 14 is connected to the second rack 13, and a third spring 15 is connected between the carriage 14 and the second slide rail 12.
When flattening dust mask, contact frame 48 moves forward and drives slide bar 7 and move forward, sliding sleeve 33 moves forward and drives wedge 9 through axle sleeve 8 and move forward, when wedge 9 moves forward to contact with balladeur train 14, at this moment, slide bar 7 just moves forward and to cooperating with first slide rail 6, wedge 9 moves forward and promotes balladeur train 14 and upwards slides, second rack 13 is thereupon upwards slided on second slide rail 12, thereby drive rhombus post 32 clockwise rotation through second gear 10, sliding sleeve 33 drives drum 37 and forwards rotates along with it, slide bar 7 is thereupon upwards slided in first slide rail 6, afterwards, take off dust mask after the flattening, so, can make things convenient for people to take off dust mask more.
On the basis of embodiment 1, as shown in fig. 1 and 6, the sliding device further includes a second fixed frame 16, a third slide rail 17, a third fixed frame 18, a fixed pulley 19, a first slider 191, a second slider 192, a return spring 1921, a pull wire 193 and a push frame 194, the second fixed frame 16 is welded on the upper portion of the front side of the rack 1, the third slide rail 17 is arranged on the second fixed frame 16, the third fixed frame 18 is welded on the lower portion of the first slide rail 6, the fixed pulley 19 is arranged on the third fixed frame 18, the first slider 191 is slidably arranged on the first slide rail 6, the second slider 192 is slidably arranged in the third slide rail 17, the return spring 1921 is connected between the second slider 192 and the third slide rail 17, the pull wire 193 is connected with the first slider 191 by bypassing the fixed pulley 19, and the push frame 194 is arranged on the second slider 192.
When the dustproof mask is leveled, the sliding rod 7 slides upwards in the first sliding rail 6, when the sliding rod 7 slides upwards to be in contact with the first sliding block 191, the sliding rod 7 slides upwards to push the first sliding block 191 to slide upwards on the first sliding rail 6, so that the second sliding block 192 is pulled to slide leftwards on the third sliding rail 17 through the pull wire 193, the reset spring 1921 is compressed accordingly, the pushing frame 194 moves leftwards along with the first sliding block to push out the leveled dustproof mask, therefore, after the dustproof mask is leveled, manual collection is not needed any more, a large amount of manpower is saved, and the working efficiency of people is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The utility model provides a dust mask levels device which characterized in that, including:
a frame (1);
the driving mechanism (2) is arranged on the rack (1) and is driven in a rotating mode;
the movable flattening mechanism (3) is arranged on the rack (1) and is used for flattening in a sliding mode;
a lifting mechanism (4) which is arranged on the frame (1) and can lift in a sliding way
The drive mechanism (2) comprises:
the speed reducing motor (21) is arranged on the rack (1);
a first gear (22) mounted on an output shaft of the reduction motor (21);
the guide rail (23) is arranged on the frame (1);
the first rack (24) is arranged in the guide rail (23), and the first rack (24) is meshed with the first gear (22);
the movable flattening mechanism (3) comprises:
the first mounting rack (31) is mounted on the rack (1);
the rhombic column (32) is rotatably mounted on the first mounting frame (31);
the sliding sleeve (33) is slidably mounted on the rhombic column (32), and the sliding sleeve (33) is connected with the first rack (24);
the telescopic rod (34) is arranged on the sliding sleeve (33);
a connecting rod (35) mounted on the telescopic rod (34);
the first spring (36) is arranged between the connecting rod (35) and the telescopic rod (34), and the first spring (36) is in a stretching state;
a cylinder (37) mounted on the connecting rod (35);
the lifting mechanism (4) comprises:
the special-shaped block (41) is arranged on the frame (1);
a sliding plate (42) which is arranged on the frame (1) in a sliding way;
at least two protruding columns (43), wherein the two protruding columns (43) are arranged on the sliding plate (42);
two stop blocks (46), wherein the two stop blocks (46) are arranged on the rack (1);
the two connecting frames (44) are arranged, and are arranged on the stop block (46) in a sliding manner;
two second springs (45) are arranged, and are respectively arranged between the connecting frame (44) and the stop block (46);
a contact plate (47) mounted between the two stoppers (46);
a contact frame (48) mounted on the cylinder (37), the contact frame (48) cooperating with the contact plate (47);
also includes:
the first fixing frame (5) is arranged on the rack (1);
the first sliding rail (6) is arranged on the first fixing frame (5);
the sliding rod (7) is arranged on the contact frame (48), and the sliding rod (7) is in sliding fit with the first sliding rail (6);
the shaft sleeve (8) is rotatably arranged on the sliding sleeve (33);
the wedge-shaped block (9) is arranged on the shaft sleeve (8);
a second gear (10) mounted on the diamond-shaped post (32);
the second mounting rack (11) is mounted on the rack (1);
the second sliding rail (12) is arranged on the second mounting rack (11);
the second rack (13) is slidably mounted on the second sliding rail (12), and the second rack (13) is meshed with the second gear (10);
the sliding frame (14) is arranged on the second sliding rail (12) in a sliding manner, and the sliding frame (14) is connected with the second rack (13);
a third spring (15) mounted between the carriage (14) and the second slide rail (12);
also includes:
the second fixing frame (16) is arranged on the rack (1);
the third slide rail (17) is arranged on the second fixed frame (16);
the third fixing frame (18) is arranged on the first sliding rail (6);
a fixed pulley (19) mounted on the third fixing frame (18);
the first sliding block (191) is slidably mounted on the first sliding rail (6);
a second slide block (192) slidably mounted in the third slide rail (17);
a return spring (1921) mounted between the second slider (192) and the third slide rail (17);
a pull wire (193) mounted on the second slider (192), the pull wire (193) passing around the fixed pulley (19) and being connected with the first slider (191);
and the pushing frame (194) is arranged on the second sliding block (192).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010981909.5A CN112277297B (en) | 2020-09-17 | 2020-09-17 | Dust mask flattening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010981909.5A CN112277297B (en) | 2020-09-17 | 2020-09-17 | Dust mask flattening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112277297A CN112277297A (en) | 2021-01-29 |
| CN112277297B true CN112277297B (en) | 2022-03-29 |
Family
ID=74420010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010981909.5A Active CN112277297B (en) | 2020-09-17 | 2020-09-17 | Dust mask flattening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112277297B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115381170B (en) * | 2022-08-23 | 2023-06-09 | 多丽制衣(珠海)有限公司 | Collar and production process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208290762U (en) * | 2018-06-11 | 2018-12-28 | 金瑞霞 | A kind of Chinese language fold handout data fast finishing flattening equipment |
| CN209009701U (en) * | 2018-11-08 | 2019-06-21 | 临沂大学 | Arrange the planisher of loose unpacked material |
| CN210190914U (en) * | 2019-01-30 | 2020-03-27 | 张秀燕 | Statistical bill flattening device |
| CN210696136U (en) * | 2020-04-16 | 2020-06-09 | 李丽娟 | Gauze mask production is with equipment of flattening |
| CN111386932A (en) * | 2020-04-21 | 2020-07-10 | 罗冬香 | Straw curtain covering device for vegetable planting |
| CN111631455A (en) * | 2020-05-28 | 2020-09-08 | 泉州誉财自动化设备有限责任公司 | Mask forming machine |
| CN111660576A (en) * | 2020-07-16 | 2020-09-15 | 季广春 | Ultrasonic wave sponge gauze mask production facility |
| CN211498189U (en) * | 2020-06-28 | 2020-09-15 | 何花 | Gauze mask production flattening device |
-
2020
- 2020-09-17 CN CN202010981909.5A patent/CN112277297B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208290762U (en) * | 2018-06-11 | 2018-12-28 | 金瑞霞 | A kind of Chinese language fold handout data fast finishing flattening equipment |
| CN209009701U (en) * | 2018-11-08 | 2019-06-21 | 临沂大学 | Arrange the planisher of loose unpacked material |
| CN210190914U (en) * | 2019-01-30 | 2020-03-27 | 张秀燕 | Statistical bill flattening device |
| CN210696136U (en) * | 2020-04-16 | 2020-06-09 | 李丽娟 | Gauze mask production is with equipment of flattening |
| CN111386932A (en) * | 2020-04-21 | 2020-07-10 | 罗冬香 | Straw curtain covering device for vegetable planting |
| CN111631455A (en) * | 2020-05-28 | 2020-09-08 | 泉州誉财自动化设备有限责任公司 | Mask forming machine |
| CN211498189U (en) * | 2020-06-28 | 2020-09-15 | 何花 | Gauze mask production flattening device |
| CN111660576A (en) * | 2020-07-16 | 2020-09-15 | 季广春 | Ultrasonic wave sponge gauze mask production facility |
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| Publication number | Publication date |
|---|---|
| CN112277297A (en) | 2021-01-29 |
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