CN109227756A - Dental floss device melts line apparatus - Google Patents
Dental floss device melts line apparatus Download PDFInfo
- Publication number
- CN109227756A CN109227756A CN201811156003.9A CN201811156003A CN109227756A CN 109227756 A CN109227756 A CN 109227756A CN 201811156003 A CN201811156003 A CN 201811156003A CN 109227756 A CN109227756 A CN 109227756A
- Authority
- CN
- China
- Prior art keywords
- dental floss
- heating rod
- connecting plate
- floss stick
- upper mold
- 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.)
- Pending
Links
- 241000628997 Flos Species 0.000 title claims abstract description 103
- 239000000155 melt Substances 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 91
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 229920004934 Dacron® Polymers 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010018275 Gingival atrophy Diseases 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 201000005562 gingival recession Diseases 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 208000009146 rhinoscleroma Diseases 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/06—Severing by using heat
- B26F3/08—Severing by using heat with heated members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of dental floss devices to melt line apparatus, including dental floss stick upper mold and dental floss stick lower die, heating rod connecting plate is provided with above the dental floss stick upper mold, the cylinder that driving heating rod connecting plate moves up and down is provided at the top of the heating rod connecting plate, hollow heating rod is connected on the heating rod connecting plate, the hollow heating rod top is connected to extraneous gas source, the dental floss stick upper mold and dental floss stick lower die correspond to the duct being provided at hollow heating rod for the insertion of hollow heating rod bottom, the hollow heating rod is located above the end of a thread fusing position of dental floss stick after protruding into duct.The present invention has in industry initiated the mode of contactless fusing, avoid a series of defects of contact fusing, the pulling force of the dental floss of nylon wire or dacron thread material can effectively be controlled and guarantee the flat pattern of line, the end of a thread and product perfect that can make dental floss are fused together, and possess very perfect surface quality and the standard compliant dental floss stick finished product of height.
Description
Technical field
The present invention relates to a kind of dental floss device components, melt line apparatus more particularly, to a kind of dental floss device.
Background technique
Dental floss stick is also known as dental floss pick, is a kind of product for cooperating toothbrush to be used together in common oral care.Dental floss stick
Has many advantages, such as convenient, efficient, safety, health.Toothbrush can only brush 70% of table on tooth, and dental floss compensates for the deficiency of toothbrush
Place is the household shield tooth product generally used now.Dental floss can effectively protect gum, removes plaque, soft dirt, and food is residual
Slag.
Currently, being limited by the influence of production equipment, most domestic dental floss generally uses high score sub-line, and diameter is generally all
It is greater than 0.12mm, this size is greater than the gap between general tooth and gum, and cleaning effect is poor, and long-time service can expand
Gap between tooth and gum, causes gingival atrophy, and price is typically all 200,000 yuan per ton or more.Another crimping is to adopt
With nylon wire or dacron thread, diameter is generally less than 0.06mm, this size is less than general gum and interdental gap,
Cleaning effect is good, while its price is per ton between ten thousand yuan of 2-5, but it is to the more demanding of equipment.It is usually to be limited by production
Very crucial fusing dental floss process at this in equipment, currently, usually there are two types of states for the disconnection of dental floss, first is that cutting, two
It is fusing, cuts this mode high failure rate, while the end of a thread is exposed outside, poor quality, less use.And dental floss fusing uses
Be that heating rod contacts dental floss directly to fuse, since the temperature of heating rod is very high, dental floss fuses rapidly when contacting dental floss, but
It is that can be stained with residue after first time fuses dental floss on heating rod, the area of the heating rod in next fusing process is caused to increase
Greatly, heating rod can be made to iron the product edge of dental floss stick, while melts and can generates that temperature is excessively high in line process so that the end of a thread blacks,
So that plastics is turned to be yellow, sometimes the too low wired hair of temperature, scleroma can be generated at the end of a thread.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of dental floss device melts line apparatus, structure novel, for the first time using heating
The fusing mode of contactless this innovation of fusing of stick, allows line and plastics perfection to combine together, plastics box line will not be made to generate hair
The sign that Huang blacks, can effectively fuse to dental floss, while the pulling force of dental floss is effectively ensured to keep the flat pattern of line.
The technical scheme is that a kind of dental floss device melts line apparatus, including dental floss stick upper mold and dental floss stick lower die, it is described
It is provided with heating rod connecting plate above dental floss stick upper mold, is provided at the top of the heating rod connecting plate on driving heating rod connecting plate
The cylinder of lower movement, hollow heating rod is connected on the heating rod connecting plate, and the hollow heating rod top is connected to extraneous gas
Source, the dental floss stick upper mold and dental floss stick lower die correspond to the hole being provided at hollow heating rod for the insertion of hollow heating rod bottom
Road, the hollow heating rod are located above the end of a thread fusing position of dental floss stick after protruding into duct.
It preferably, further include workbench, the dental floss stick lower die setting on the table, passes through column on the workbench
It is connected with oil cylinder mounting plate, oil cylinder is connected on the oil cylinder mounting plate, the piston rod of the oil cylinder lower end is connected to connecting plate
On, the connecting plate is connected at dental floss stick upper mold by guide post, and the heating rod connecting plate is located on connecting plate and dental floss stick
It can slide up and down between mould and along guide post, the cylinder is arranged on connecting plate, and cylinder piston rod passes through connecting plate rear-guard and takes offence
The movement of cylinder driving plate, it is synchronous along on guide post that the cylinder driving plate and heating rod connecting plate are fixed by the connecting rod connection the two
Lower slider.
Preferably, it is provided with buffer spring on the guide post between the heating rod connecting plate and dental floss stick upper mold and height is adjusted
Save bolt.
Preferably, dental floss stick upper mold bottom surface is provided with positioning column, and dental floss stick lower die top surface is provided with and positions
The location hole that column matches, the dental floss stick upper mold and dental floss stick lower die realize positioning by positioning column and locating piece.
Preferably, the hollow heating rod lower end is bringing-up section, is provided on the hollow heating rod so that hollow heating
Stick is constantly in the negative leads, signal wire and thermocouple lead of controllable state during heating.
Preferably, the hollow heating rod is hollow ceramic heating bar, and the bringing-up section is from hollow heating rod bottom
Place upwardly extends, and continuing height is 10mm-15mm.
Preferably, temperature of the bringing-up section of the hollow heating rod in heated condition is greater than 400 DEG C.
The present invention has in industry initiated the mode of contactless fusing, avoids a series of defects of contact fusing,
Fusing mode of the invention can effectively control the pulling force of the dental floss of nylon wire or dacron thread material and guarantee the pancake of line
Shape is adjusted by the height of combination temperature and the length of gassing time, and the end of a thread of dental floss and product perfect fusion can be made to exist
Together, possess very perfect surface quality and the standard compliant dental floss stick finished product of height.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram at another visual angle Fig. 1；
Fig. 3 is the structural schematic diagram of upper mold coupling part of the present invention；
Fig. 4 is the structural schematic diagram at another visual angle Fig. 3；
Wherein: 1-dental floss stick upper mold；2-dental floss stick lower dies；3-heating rod connecting plates；4-cylinders；5-hollow heating rods；
6-ducts；7-workbench；8-columns；9-oil cylinder mounting plates；10-oil cylinders；11-connecting plates；12-guide posts；13-cylinders
Driving plate；14-height adjustment bolts.
Specific embodiment
With reference to the accompanying drawing, invention is further described in detail.
As shown in Figures 1 to 4, the present invention provides a kind of dental floss devices to melt line apparatus, including dental floss stick upper mold 1 and dental floss stick
Lower die 2 is provided with heating rod connecting plate 3 above the dental floss stick upper mold 1, is provided with driving at the top of the heating rod connecting plate 3
The cylinder 4 that heating rod connecting plate 3 moves up and down, is connected with hollow heating rod 5 on the heating rod connecting plate 3, it is described hollow plus
5 top of hot pin is connected to extraneous gas source, is provided at the dental floss stick upper mold 1 and the corresponding hollow heating rod 5 of dental floss stick lower die 2 for sky
The penetrating duct 6 of 5 bottom of heart heating rod insertion, the hollow heating rod 5, which protrudes into behind duct 6, to be located at the end of a thread of dental floss stick and fuses
Above position.
It preferably, further include workbench 7, the setting of dental floss stick lower die 2 on the table 7, passes through on the workbench 7
Column 8 is connected with oil cylinder mounting plate 9, and oil cylinder 10 is connected on the oil cylinder mounting plate 9, and the piston rod of 10 lower end of oil cylinder connects
It connects on connecting plate 11, the connecting plate 11 is connected at dental floss stick upper mold 1 by guide post 12, the heating rod connecting plate 3
It can slide up and down between connecting plate 11 and dental floss stick upper mold 1 and along guide post 12, the cylinder 4 is arranged on connecting plate 11, gas
4 piston rod of cylinder passes through 11 rear-guard of connecting plate and takes offence the movement of cylinder driving plate 13, and the cylinder driving plate 13 is logical with heating rod connecting plate 3
It crosses connecting rod and both is fixedly connected with synchronization and slided up and down along guide post 12.
Preferably, buffer spring and height are provided on the guide post 12 between the heating rod connecting plate 3 and dental floss stick upper mold 1
Degree adjusts bolt 14.The setting of height adjustment bolt 14 is used to adjust heating rod connecting plate 3 to be moved downward under the driving of cylinder 4
Limit travel after height adjustment bolt 14 supports dental floss stick upper mold 1, add during heating rod connecting plate 3 moves downward
3 stop motion of hot pin connecting plate, hollow 5 lower end of heating rod has moved to top at the end of a thread fusing of dental floss stick at this time, is passed through
Gas, gas become high-temperature gas, the end of a thread for the dental floss stick that can smoothly fuse after bringing-up section, and the setting of buffer spring is then
For the stationarity for guaranteeing heating rod connecting plate 3 and dental floss stick upper mold 1 moves between the two, the impact force both reduced is played
Protect the purpose of the components such as hollow heating rod 5.
Preferably, 1 bottom surface of dental floss stick upper mold is provided with positioning column, and 2 top surface of dental floss stick lower die is provided with and determines
The location hole that position column matches, the dental floss stick upper mold 1 and dental floss stick lower die 2 realize positioning by positioning column and locating piece.It protects
Hinder the accurate molding of dental floss stick upper and lower mould, it is ensured that be molded and melt going on smoothly for line process.
Preferably, 5 lower end of hollow heating rod is bringing-up section, is provided on the hollow heating rod 5 so that hollow add
Hot pin 5 is constantly in the negative leads, signal wire and thermocouple lead of controllable state during heating.The benefit of this design
Energy conservation, while heating speed is fast, and heating rod long working life, temperature can control in constant a small range.
Preferably, the hollow heating rod 5 is hollow ceramic heating bar, and the bringing-up section is from hollow 5 bottom of heating rod
It is upwardly extended at portion, continuing height is 10mm-15mm.The design heating effect of this structure snd size is good, and heating speed is fast,
And stable working state is reliable.
Preferably, temperature of the bringing-up section of the hollow heating rod 5 in heated condition is greater than 400 DEG C.
In use, the drive connection of oil cylinder 10 plate 11 moves downward first, since connecting plate 11 is fixedly connected by guide post 12
At dental floss stick upper mold 1, so the stroke that 10 piston rod of oil cylinder moves downward is the stroke that dental floss stick upper mold 1 moves downward,
The positioning column that dental floss stick upper mold 1 moves downward through bottom surface enters in dental floss stick lower die 2, realizes the molding of upper and lower mould, oily at this time
10 stop motion of cylinder carries out the injection moulding process of dental floss rod product, and after the completion of injection molding, cylinder 4 drives cylinder driving plate 13 to transport downwards
It is dynamic, it is connected on heating rod connecting plate 3 since cylinder driving plate 13 is fixed by the connecting rod, the row that cylinder 4 moves downward
Journey is the stroke that heating rod connecting plate 3 moves downward, and wherein the setting of height adjustment bolt 14 ensures heating rod connecting plate
13 extreme positions moved downward, that is, melt the position of linear state, the setting of buffer spring ensure that the stationarity of movement,
When dental floss stick upper mold 1, heating rod connecting plate 3 and height adjustment bolt 14 contact with each other, 4 stop motion of cylinder is hollow at this time to add
Hot pin 5 is already inserted into duct 6 and moves in place, and control gas is passed through in hollow heating rod 5, and gas is from hollow 5 bottom of heating rod
Bringing out just becomes high-temperature gas when coming, and by the dental floss that fused immediately at the end of a thread of dental floss stick, and guarantees the end of a thread and product perfect
Be combined together.Then control cylinder 4 resets, and drives heating rod connecting plate 3 to move upwards reset, while oil cylinder 10 is transported upwards
Dynamic to reset, dental floss stick upper mold 1 moves upwards reset, then takes away the dental floss stick taking-up of forming by feeding structure, prepares
The injection molding of next group dental floss stick and melt line process, loops back and forth like this, realize the production process of automation.Product in this device
Quantity can according to actual needs depending on, such as can accomplish 1 go out 48 or 24 etc., it is only necessary to the type chamber quantity pair of upper and lower mould
It answers, while the quantity of hollow heating rod 5 and position are mapped.
The above is only better embodiment of the invention, not makes any form of restriction to invention, it is all according to
According to technical principle any simple modification, equivalent variations or modification made to the above embodiment of the invention, the present invention is still fallen within
In the range of technical solution.
Claims (7)
1. a kind of dental floss device melts line apparatus, including dental floss stick upper mold (1) and dental floss stick lower die (2), on the dental floss stick upper mold (1)
Side is provided with heating rod connecting plate (3), it is characterised in that: is provided with driving heating rod at the top of the heating rod connecting plate (3) and connects
The cylinder (4) that fishplate bar (3) moves up and down is connected with hollow heating rod (5) on the heating rod connecting plate (3), it is described hollow plus
Hot pin (5) top is connected to extraneous gas source, sets at the dental floss stick upper mold (1) and the corresponding hollow heating rod (5) of dental floss stick lower die (2)
It is equipped with the duct (6) for the insertion of hollow heating rod (5) bottom, the hollow heating rod (5) protrudes into duct (6) and is located at dental floss stick afterwards
The end of a thread fusing position above.
2. dental floss device according to claim 1 melts line apparatus, it is characterised in that: further include workbench (7), the dental floss stick
Lower die (2) is arranged on workbench (7), is connected with oil cylinder mounting plate (9), the oil by column (8) on the workbench (7)
It is connected on cylinder mounting plate (9) oil cylinder (10), the piston rod of oil cylinder (10) lower end is connected on connecting plate (11), the company
Fishplate bar (11) is connected at dental floss stick upper mold (1) by guide post (12), the heating rod connecting plate (3) be located at connecting plate (11) and
It can slide up and down between dental floss stick upper mold (1) and along guide post (12), the cylinder (4) is arranged on connecting plate (11), cylinder (4)
Piston rod passes through connecting plate (11) rear-guard and takes offence cylinder driving plate (13) movement, the cylinder driving plate (13) and heating rod connecting plate
(3) both connections synchronization is fixed by the connecting rod to slide up and down along guide post (12).
3. dental floss device according to claim 2 melts line apparatus, it is characterised in that: the heating rod connecting plate (3) and dental floss
Buffer spring and height adjustment bolt (14) are provided on guide post (12) between stick upper mold (1).
4. dental floss device according to claim 1 melts line apparatus, it is characterised in that: dental floss stick upper mold (1) the bottom surface setting
There is positioning column, dental floss stick lower die (2) top surface is provided with the location hole matched with positioning column, the dental floss stick upper mold (1)
Positioning is realized by positioning column and locating piece with dental floss stick lower die (2).
5. dental floss device according to claim 1 melts line apparatus, it is characterised in that: hollow heating rod (5) lower end is to add
Hot arc is provided with so that hollow heating rod (5) is constantly in controllable state during heating on the hollow heating rod (5)
Negative leads, signal wire and thermocouple lead.
6. dental floss device according to claim 5 melts line apparatus, it is characterised in that: the hollow heating rod (5) is hollow
Ceramic heating bar, the bringing-up section are to upwardly extend from hollow heating rod (5) bottom, and continuing height is 10mm-15mm.
7. dental floss device according to claim 5 melts line apparatus, it is characterised in that: the bringing-up section of the hollow heating rod (5)
Temperature in heated condition is greater than 400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156003.9A CN109227756A (en) | 2018-09-30 | 2018-09-30 | Dental floss device melts line apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811156003.9A CN109227756A (en) | 2018-09-30 | 2018-09-30 | Dental floss device melts line apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109227756A true CN109227756A (en) | 2019-01-18 |
Family
ID=65055010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811156003.9A Pending CN109227756A (en) | 2018-09-30 | 2018-09-30 | Dental floss device melts line apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109227756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113696420A (en) * | 2021-08-31 | 2021-11-26 | 余姚市科琳日用品有限公司 | Automatic production equipment for multi-cavity efficient dental floss rod |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2235782A1 (en) * | 1973-07-04 | 1975-01-31 | Grangier Hubert | Contactless cutting of plastics filaments or fabric - using hot air jet, esp. with temp. adjustment and rapid shut-off |
| CN102131965A (en) * | 2008-08-27 | 2011-07-20 | 欧瑞康纺织有限及两合公司 | Method for melt spinning, stretching and winding multifilament thread and device for carrying out same |
| CN102380888A (en) * | 2010-08-31 | 2012-03-21 | 富士胶片株式会社 | Method for producing functional film |
| CN203449386U (en) * | 2013-09-13 | 2014-02-26 | 徐猛 | Clamping and line sealing device for automatic dental floss production |
| CN204709045U (en) * | 2015-05-28 | 2015-10-21 | 黄炳国 | A kind of the end of a thread device for fusing of dental floss device |
| CN207841578U (en) * | 2017-12-13 | 2018-09-11 | 中航锂电（江苏）有限公司 | Diaphragm hot knife device |
| CN209063276U (en) * | 2018-09-30 | 2019-07-05 | 金群荣 | Dental floss device melts line apparatus |
-
2018
- 2018-09-30 CN CN201811156003.9A patent/CN109227756A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2235782A1 (en) * | 1973-07-04 | 1975-01-31 | Grangier Hubert | Contactless cutting of plastics filaments or fabric - using hot air jet, esp. with temp. adjustment and rapid shut-off |
| CN102131965A (en) * | 2008-08-27 | 2011-07-20 | 欧瑞康纺织有限及两合公司 | Method for melt spinning, stretching and winding multifilament thread and device for carrying out same |
| CN102380888A (en) * | 2010-08-31 | 2012-03-21 | 富士胶片株式会社 | Method for producing functional film |
| CN203449386U (en) * | 2013-09-13 | 2014-02-26 | 徐猛 | Clamping and line sealing device for automatic dental floss production |
| CN204709045U (en) * | 2015-05-28 | 2015-10-21 | 黄炳国 | A kind of the end of a thread device for fusing of dental floss device |
| CN207841578U (en) * | 2017-12-13 | 2018-09-11 | 中航锂电（江苏）有限公司 | Diaphragm hot knife device |
| CN209063276U (en) * | 2018-09-30 | 2019-07-05 | 金群荣 | Dental floss device melts line apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 王善樵等: "《起重机安全保护技术》", 28 February 2009, 中国铁道出版社, pages: 47 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113696420A (en) * | 2021-08-31 | 2021-11-26 | 余姚市科琳日用品有限公司 | Automatic production equipment for multi-cavity efficient dental floss rod |
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