CN113650123B - Manufacturing method of lunch box - Google Patents
Manufacturing method of lunch box Download PDFInfo
- Publication number
- CN113650123B CN113650123B CN202110745989.9A CN202110745989A CN113650123B CN 113650123 B CN113650123 B CN 113650123B CN 202110745989 A CN202110745989 A CN 202110745989A CN 113650123 B CN113650123 B CN 113650123B
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- China
- Prior art keywords
- die
- cavity
- bucket
- wood board
- manufacturing
- 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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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000002023 wood Substances 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 14
- 239000011086 glassine Substances 0.000 claims description 15
- 238000007373 indentation Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 241000219000 Populus Species 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 19
- 229920003023 plastic Polymers 0.000 description 14
- 239000004033 plastic Substances 0.000 description 13
- 238000001746 injection moulding Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 6
- 241000183024 Populus tremula Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002489 tectorial membrane Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/24—Manufacture or reconditioning of specific semi-finished or finished articles of household utensils, e.g. spoons, clothes hangers, clothes pegs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/04—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by punching out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
Abstract
The invention provides a manufacturing method of a lunch box, belongs to the field of lunch box manufacturing, and solves the problems that the existing wooden lunch box is easy to leak water and oil, and S1: coating films on two sides of the wood board; s2: feeding the wood board covered with the film into punching equipment, and punching the wood board covered with the film by a cutting die to obtain a punched board body; s3: placing the die-cut plate body into a fixed die, then approaching the movable die to the fixed die, and closing the die, wherein in the process of closing the die, the die-cut plate body is pressed into a bucket-shaped piece, and the bucket-shaped piece comprises a bottom plate and side plates arranged around the bottom plate; after the die is assembled, the inner side surface of the bucket-shaped piece is attached to the outer surface of the movable die, a first cavity is formed between the fixed film and the joint of the bottom plate and the side plate, a second cavity is formed between the adjacent side plates and between the fixed film and the movable die, and the first cavity is communicated with the second cavity; s4: injecting and filling the first cavity and the second cavity into the first cavity and the second cavity; s5: and finally, demolding to obtain the box body. The box body has good water leakage and oil leakage prevention effects.
Description
Technical Field
The invention belongs to the field of lunch box manufacturing, and particularly relates to a manufacturing method of a lunch box.
Background
With the development of society, more and more convenience stores can sell convenience, guests can buy the convenience stores and then eat the convenience stores by microwave heating in the stores, and the convenience stores can discard the convenience boxes after eating. In the conventional convenience stores, many lunch boxes made of wood materials are provided, but after foods are placed in the lunch boxes made of wood materials, water leakage and oil leakage are easy to occur.
Disclosure of Invention
A first object of the present invention is to provide a method of manufacturing a lunch box, which aims at the above-mentioned problems existing in the prior art.
The aim of the invention can be achieved by the following technical scheme: a method of manufacturing a lunch box comprising the steps of:
step S1: coating films on two sides of the wood board;
step S2: feeding the wood board covered with the film into punching equipment, and punching the wood board covered with the film by a cutting die to obtain a punched board body;
step S3: placing the die-cut plate body into a fixed die, then approaching the movable die to the fixed die, and closing the die, wherein in the process of closing the die, the die-cut plate body is pressed into a bucket-shaped piece, and the bucket-shaped piece comprises a bottom plate and side plates arranged around the bottom plate;
after the die is assembled, the inner side surface of the bucket-shaped piece is attached to the outer surface of the movable die, a first cavity is formed between the connecting part of the bottom plate and the side plate and the fixed film, a second cavity is formed between the adjacent side plates and the fixed film and between the adjacent side plates and the movable die, and the first cavity is communicated with the second cavity;
step S4: injecting and filling the first cavity and the second cavity into the first cavity and the second cavity;
step S5: and finally, demolding to obtain the box body.
In the above method for manufacturing a lunch box, in the step S1, the film is glassine paper.
In the above-described method of manufacturing a lunch box, in the step S1, glassine paper is coated on both side surfaces of a wood board at a temperature of 1000 ℃.
In the method for manufacturing a lunch box, in the step S3, the bottom plate has a first notch formed by die-cutting in the step S2.
In the manufacturing method of the lunch box, the first notch is arc-shaped.
In the manufacturing method of the lunch box, the two ends of the top of the side plate are provided with second notches, and the second notches are formed by punching through the cutting die in the step S2.
In the manufacturing method of the lunch box, in the step S3, an opening is formed between the adjacent side plates, and the opening is formed by punching and cutting the plate body into a bucket-shaped member by the knife die in the step S2.
In the manufacturing method of the lunch box, the first notch is positioned at one end of the opening, and the second notch is positioned at two sides of the other end of the opening.
In the manufacturing method of the lunch box, in the step S3, in the process of pressing the punched plate body into the bucket, the outer surface of the bucket is formed with the indentation.
In the above method for manufacturing a lunch box, the step S1 is further preceded by a step S0, step S0: cutting poplar to obtain a raw wood board, and then carrying out frosting treatment on the surfaces of two sides of the raw wood board to obtain the wood board.
Compared with the prior art, the lunch box body prepared by the method has high integral strength and good water leakage and oil leakage prevention effects.
Drawings
FIG. 1 is a schematic view of a bucket of the present invention;
FIG. 2 is a schematic view of the structure of the reinforcing bars, tie bars and indentations of the present invention;
FIG. 3 is a schematic view of the structure of the case of the present invention;
FIG. 4 is a schematic view of the structure of the support layer and the protective layer of the present invention;
fig. 5 is a schematic view of the structure of the cap of the present invention.
In the figure, 1, a box body; 2. a receiving chamber; 3. a bottom plate; 4. a side plate; 5. an opening; 6. a connecting strip; 7. a support layer; 8. a protective layer; 9. indentation; 10. reinforcing strips; 11. a first notch; 12. a second notch; 13. A bucket; 14. and a box cover.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 3, a method of manufacturing a lunch box includes the steps of:
step S0: cutting poplar to obtain a raw wood board, and then carrying out frosting treatment on the surfaces of two sides of the raw wood board to obtain the wood board. The purpose of carrying out frosting treatment is for in the later step S1 tectorial membrane in-process for laminating better, more inseparable between membrane and the plank.
Step S1: coating films on two sides of the wood board;
the paper film is glassine paper, and the glassine paper has the functions of high temperature resistance, water resistance, oil resistance and the like. Glassine paper is coated on both sides of the wood board at a temperature of 1000 c. The high Wen Jineng of 1000 ℃ can disinfect and sterilize the wood board and the glassine paper, and the glassine paper and the wood board are combined more firmly and tightly by coating the film at the high temperature, so that the glassine paper is not easy to fall off. The combination between the glassine paper and the wood board does not need to add any other adhesive, and the glassine paper and the wood board are environment-friendly.
Step S2: feeding the wood board covered with the film into punching equipment, and punching the wood board covered with the film by a cutting die to obtain a punched board body;
the wood board covered with the film is punched by a cutting die to form a reserved opening, a first notch 11 and a second notch 12. The first notch 11 is located at four corners of the bottom plate 3 of the bucket 13 formed in the subsequent step S3, the second notch 12 is located at two ends of the top of the side plate 4 of the bucket 13 formed in the subsequent step S3, the first notch 11 is arc-shaped, the second notch 12 is irregularly shaped, and after the second notch 12 is formed by punching, two ends of the top of the side plate 4 of the bucket 13 are uneven. The purpose of punching to form the first notch 11 and the second notch 12 is to facilitate the subsequent injection molding process in the step S4, so that the plastic part formed after injection molding and the bucket-shaped part 13 are better connected, the combination is tighter, and the plastic part is not easy to fall off from the bucket-shaped part 13. The purpose of punching the reserved openings is to facilitate the bending and pressing of the punched plate body into the bucket-shaped member 13 in the subsequent step S3, thereby forming the corresponding openings 5, and the adjacent side plates 4 do not interfere with each other in the pressing process.
Step S3: putting the die-cut plate body into a fixed die, then approaching the movable die to the fixed die and closing the die, and pressing the die-cut plate body into a bucket-shaped piece 13 in the process of closing the die, wherein the bucket-shaped piece 13 comprises a bottom plate 3 and side plates 4 arranged around the bottom plate 3;
after the die is assembled, the inner side surface of the bucket-shaped piece 13 is attached to the outer surface of the movable die, a first cavity is formed between the connecting part of the bottom plate 3 and the side plate 4 and the fixed die, a second cavity is formed between the adjacent side plates 4 and the fixed die and between the adjacent side plates and the movable die, and the first cavity is communicated with the second cavity;
firstly, putting the punched plate body into a fixed die, then, moving the die towards the fixed die to close and die-close, in the die-closing process, bending the plate body into a bucket-shaped piece 13 by the moving die, forming a corresponding indentation 9 on the outer surface of the bucket-shaped piece 13, compacting the aspen wood material by the moving die by the indentation 9, increasing the density, and increasing the strength, thereby increasing the integral strength of the bucket-shaped piece 13, enabling the density of the plastic piece formed by subsequent injection molding to be more similar to that of the bucket-shaped piece 13, enabling the combination between the aspen wood material and glassine paper to be firmer, and better in waterproof and oil-proof performances.
After forming the bucket shape, the adjacent side plate 4 has an opening 5. The first notch 11 is located at one end of the opening 5, and the second notch 12 is located at two sides of the other end of the opening 5.
After the die is assembled, the inner side surface of the bucket-shaped piece 13 is attached to the outer surface of the movable die, a first cavity is formed between the connecting part of the bottom plate 3 and the side plate 4 and the fixed die, a second cavity is formed between the adjacent side plates 4 and the fixed die and between the adjacent side plates and the movable die, and the first cavity is communicated with the second cavity;
step S4: injecting and filling the first cavity and the second cavity into the first cavity and the second cavity;
step S5: finally, demoulding to obtain the box body 1.
And injecting and filling the first cavity and the second cavity into the first cavity and the second cavity, maintaining pressure, cooling, and demolding to obtain the box body 1, wherein the plastic piece is positioned at the outer side of the bucket-shaped piece 13. The plastic part comprises a connecting strip 6 and a reinforcing strip 10. Injection molding, pressure maintaining and cooling are carried out in the second cavity, and then demolding is carried out to form a connecting strip 6, wherein the connecting strip 6 covers the opening 5 and the second notch 12; and the first cavity is injected, pressure-maintaining and cooling are carried out, then demoulding is carried out to form a reinforcing strip 10, the reinforcing strip 10 covers the joint between the bottom plate 3 and the side plate 4, the first cavity is communicated with the second cavity, and the joint between the reinforcing strip 10 and the connecting strip 6 covers the first notch 11.
As shown in fig. 1-5, the convenient box provided by the embodiment of the invention comprises a box body 1, wherein the box body 1 is provided with a containing cavity 2 for containing food, the box body 1 comprises a bottom plate 3 and side plates 4 arranged around the bottom plate 3, the bottom plate 3 and the side plates 4 surround to form the containing cavity 2, an opening 5 is arranged between the adjacent side plates 4, connecting strips 6 are formed at the positions of the openings 5 in an injection molding manner, the bottom plate 3 and the side plates 4 comprise a supporting layer 7 and protective layers 8 arranged on two sides of the supporting layer 7, the supporting layer 7 is made of wood materials, and the protective layers 8 are made of waterproof and oil-proof materials.
Further, the protective layer 8 is made of glassine paper. The glassine paper has the functions of high temperature resistance, water resistance, oil resistance and the like. The protective layer 8 is a protective film.
Further, the supporting layer 7 is made of aspen wood material. Natural and environment-friendly.
Further, the outer surfaces of the bottom plate 3 and the side plates 4 are provided with indentations 9.
Further, the side plate 4 and the bottom plate 3 are integrally connected, and a reinforcing strip 10 is formed at the joint of the side plate 4 and the bottom plate 3 by injection molding. The bottom plate 3 is provided with a first notch 11, the first notch 11 is communicated with the opening 5, the first notch 11 is arc-shaped, and the joint of the reinforcing strip 10 and the connecting strip 6 covers the first notch 11. The connecting strip 6 is connected with the connecting strip 6 through a reinforcing strip 10. The reinforcing strip 10 and the connecting strip 6 are integrally connected.
After the bucket-shaped piece 13 is formed by die assembly, the corresponding bottom plate 3 and four side plates 4 are formed, the side plates 4 are integrally connected with the bottom plate 3, openings 5 are formed between the adjacent side plates, and then an injection molding process is carried out to form plastic pieces, namely connecting strips 6 and reinforcing strips 10. The connecting strip 6 covers the opening 5, the reinforcing strip 10 covers the connection part of the side plate 4 and the bottom plate 3, and the connection part of the reinforcing strip 10 and the connecting strip 6 covers the first notch 11. The connecting strip 6 and the reinforcing strip 10 are integrally connected.
The connecting strip 6 and the reinforcing strip 10 made of plastic improve the strength of the whole box body 1. Because connecting strip 6 covers opening 5, so oil, water can not leak from opening 5 and first breach 11, and forms bucket 13 through the compound die, and bucket 13's surface has the indentation then moulds plastics again for connecting strip 6 and reinforcing strip 10 are more firm with bottom plate 3, the junction of curb plate 4, waterproof grease proofing performance is better, reinforcing strip 10 covers the junction at curb plate 4 and bottom plate 3, makes difficult disconnection between curb plate 4 and the bottom plate 3, and box body 1 holistic intensity is higher. The purpose of the openings 5 is to avoid interference between adjacent side plates 4 during the closing of the mold to form the bucket 13. The first notch 11 is located at a corner of the bottom plate 3, and the purpose of the arc-shaped first notch 11 is to enable the combination of the bottom plate 3 and the plastic piece to be tighter in the injection molding process, so that the plastic piece is not easy to fall off.
Further, two ends of the top of the side plate 4 are provided with second notches 12. The second notch 12 is in an irregular shape, and two ends of the top of the side plate 4 of the bucket-shaped piece 13 are uneven. The purpose is in order to be in the in-process of moulding plastics formation tie bar 6 for the combination of curb plate 4 and tie bar 6 is inseparabler, makes tie bar 6 be difficult for droing, thereby with the inseparabler of whole working of plastics (i.e. tie bar 6 and reinforcing bar 10, tie bar 6 and reinforcing bar 10 integration are connected), the working of plastics is difficult for droing.
Further, the utility model also comprises a box cover 14, wherein the box cover 14 is arranged above the box body 1. The lid 14 is made of transparent plastic.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although a number of terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (6)
1. A method of manufacturing a lunch box, comprising the steps of:
step S1: covering glassine paper on two side surfaces of a wood board at the temperature of 1000 ℃, and covering glassine paper on two sides of the wood board as a film;
step S2: feeding the wood board covered with the film into punching equipment, and punching the wood board covered with the film by a cutting die to obtain a punched board body;
step S3: putting the die-cut plate body into a fixed die, then approaching the movable die to the fixed die and closing the die, and pressing the die-cut plate body into a bucket-shaped piece (13) in the process of closing the die, wherein the bucket-shaped piece (13) comprises a bottom plate (3) and side plates (4) arranged around the bottom plate (3);
after the die is assembled, the inner side surface of the bucket-shaped piece (13) is attached to the outer surface of the movable die, a first cavity is formed between the fixed film and the connecting part of the bottom plate (3) and the side plate (4), a second cavity is formed between the adjacent side plates (4) and the fixed film and between the adjacent side plates and the movable die, and the first cavity and the second cavity are communicated;
an opening (5) is formed between the adjacent side plates (4), the opening (5) is formed by punching and cutting the side plates through a cutting die in the step S2 to form a reserved opening, and then bending and pressing the punched plate body into a bucket-shaped piece (13):
step S4: injecting and filling the first cavity and the second cavity into the first cavity and the second cavity;
step S5: finally, demolding to obtain a box body (1);
in the step S3, in the process of pressing the punched plate body into the bucket-shaped piece (13), an indentation (9) is formed on the outer surface of the bucket-shaped piece (13).
2. A method of manufacturing a lunch box according to claim 1, wherein in step S3, the bottom plate (3) has a first notch (11), said first notch (11) being formed by die-cutting in step S2.
3. A method of manufacturing a lunch box according to claim 2, wherein said first indentation (11) is arc-shaped.
4. A method of manufacturing a lunch box according to claim 3, wherein the side plate (4) has a second notch (12) at its top end, said second notch (12) being formed by die-cutting in step S2.
5. A method of manufacturing a lunch box according to claim 4, wherein the first notch (11) is located at one end of the opening (5) and the second notch (12) is located at both sides of the other end of the opening (5).
6. The method of manufacturing a lunch box according to claim 1, wherein step S1 is preceded by step S0, step S0: cutting poplar to obtain a raw wood board, and then carrying out frosting treatment on the surfaces of two sides of the raw wood board to obtain the wood board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745989.9A CN113650123B (en) | 2021-07-01 | 2021-07-01 | Manufacturing method of lunch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745989.9A CN113650123B (en) | 2021-07-01 | 2021-07-01 | Manufacturing method of lunch box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113650123A CN113650123A (en) | 2021-11-16 |
| CN113650123B true CN113650123B (en) | 2023-10-24 |
Family
ID=78477866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110745989.9A Active CN113650123B (en) | 2021-07-01 | 2021-07-01 | Manufacturing method of lunch box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113650123B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101356063A (en) * | 2006-01-06 | 2009-01-28 | 斯特普尔斯办公用品超市有限公司 | Molded binder |
| CN101578020A (en) * | 2008-05-09 | 2009-11-11 | 富准精密工业(深圳)有限公司 | Shell and manufacture method thereof |
| CN101687334A (en) * | 2007-03-14 | 2010-03-31 | 李九顺 | Method of preparing a synthetic resinous article on which natural wood-based panels are formed |
| CN103894837A (en) * | 2014-02-26 | 2014-07-02 | 常熟市福莱德连接器科技有限公司 | Junction box cover forming technology |
| CN104339600A (en) * | 2013-07-29 | 2015-02-11 | 群达塑胶电子（深圳）有限公司 | Double-surface die inner injection moulding product and production method thereof |
| CN208084810U (en) * | 2018-04-19 | 2018-11-13 | 东莞市昊通塑胶科技有限公司 | A kind of sheet material die cutting die and the adapted to injection system with sheet material die cutting die |
| CN112810943A (en) * | 2019-11-18 | 2021-05-18 | 上海紫丹食品包装印刷有限公司 | Single-side inner-side rubber-coated paper-plastic combined formed packaging box |
-
2021
- 2021-07-01 CN CN202110745989.9A patent/CN113650123B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101356063A (en) * | 2006-01-06 | 2009-01-28 | 斯特普尔斯办公用品超市有限公司 | Molded binder |
| CN101687334A (en) * | 2007-03-14 | 2010-03-31 | 李九顺 | Method of preparing a synthetic resinous article on which natural wood-based panels are formed |
| CN101578020A (en) * | 2008-05-09 | 2009-11-11 | 富准精密工业(深圳)有限公司 | Shell and manufacture method thereof |
| CN104339600A (en) * | 2013-07-29 | 2015-02-11 | 群达塑胶电子（深圳）有限公司 | Double-surface die inner injection moulding product and production method thereof |
| CN103894837A (en) * | 2014-02-26 | 2014-07-02 | 常熟市福莱德连接器科技有限公司 | Junction box cover forming technology |
| CN208084810U (en) * | 2018-04-19 | 2018-11-13 | 东莞市昊通塑胶科技有限公司 | A kind of sheet material die cutting die and the adapted to injection system with sheet material die cutting die |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113650123A (en) | 2021-11-16 |
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