CN113926206A - Plastic acoustic generator with antibacterial master batch and preparation method thereof - Google Patents
Plastic acoustic generator with antibacterial master batch and preparation method thereof Download PDFInfo
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- CN113926206A CN113926206A CN202111302863.0A CN202111302863A CN113926206A CN 113926206 A CN113926206 A CN 113926206A CN 202111302863 A CN202111302863 A CN 202111302863A CN 113926206 A CN113926206 A CN 113926206A
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- master batch
- plastic
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- antibacterial
- antibacterial master
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- 239000004033 plastic Substances 0.000 title claims abstract description 43
- 229920003023 plastic Polymers 0.000 title claims abstract description 43
- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 28
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000012768 molten material Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 4
- 230000001755 vocal effect Effects 0.000 claims description 4
- 230000003115 biocidal effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 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
- 239000000025 natural resin Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H5/00—Musical or noise- producing devices for additional toy effects other than acoustical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/04—Sound-producing devices
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
- B29C2045/0058—Shaping removing material
Abstract
The invention discloses a plastic sounder with antibacterial master batches and a preparation method thereof. According to the invention, the antibacterial master batch is prepared by mixing the inorganic antibacterial agent and the plastic raw material, and then the antibacterial master batch and the plastic raw material are mixed and processed, so that the antibacterial master batch can be better integrated with the plastic raw material, and has a better antibacterial effect.
Description
Technical Field
The invention relates to the technical field of plastic preparation, in particular to a plastic sounder with antibacterial master batches and a preparation method thereof.
Background
Plastics are a class of synthetic polymeric materials having plasticity. It, synthetic rubber and synthetic fiber form three indispensable synthetic materials in daily life. Specifically, the plastic is a material which is prepared by using natural or synthetic resin as a main component, adding various additives, and molding into a certain shape under certain conditions such as temperature and pressure, and the shape is kept unchanged at normal temperature. With the development of industry, plastic products have been used in various fields of agriculture and daily life, and a plastic generator is a common toy accessory for children, which can be applied to many toys for children.
The existing plastic sounder is easy to stick bacteria when contacting with the outside during playing and using, and the plastic sounder is often contacted with the mouth, which is easy to cause the bacteria to enter the oral cavity of children or pets to infect germs, therefore, the invention of the plastic sounder with the antibacterial master batch and the preparation method thereof is necessary.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a plastic sound generator with an antibacterial masterbatch and a method for manufacturing the same.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a plastics vocal ware with antibiotic master batch, includes the gasbag body, gasbag body quantity sets up to two, two evenly be equipped with the buffering bag between the gasbag body, two gasbag body top and bottom are equipped with footstock and base respectively, the footstock top is equipped with into the air cavity, the base bottom is equipped with out the vocal chamber, it is equipped with the sound production piece to go out the intracavity portion.
In a preferred embodiment, the top of the inner wall of the air bag body is provided with a threaded ring, and the top seat is matched with the threaded ring.
In a preferred embodiment, a collar is arranged around the outer side of the top of the base, and the collar is in threaded connection with the outer wall of the air bag body.
In a preferred embodiment, a collar is fixedly arranged on the top surface of the air inlet cavity, and the collar is arranged around the outer side of the air inlet cavity.
In a preferred embodiment, a clamping groove is formed around the outer side of the sound-emitting block, and the clamping groove is fixedly arranged inside the sound-emitting cavity.
In a preferred embodiment, the sounding block is internally provided with a plurality of air guide vanes, and the air guide vanes are connected with the inner wall of the sounding block in a sliding manner.
A preparation method of a plastic sounder with antibacterial master batches comprises the following steps:
the method comprises the following steps: selecting different inorganic antibacterial agents according to the use environment of the product, adding the inorganic antibacterial agents into the plastic raw materials, mixing and stirring, continuously heating for 16-18h to enable the inorganic antibacterial agents to be mixed with the raw materials and to be in a molten state, injecting the molten material into a master batch granulator for granulation, and cooling and storing the processed master batches;
step two: adding the plastic raw material and the master batch into a reaction kettle for heating, continuously stirring in the heating process at a stirring speed of 60-90r/min for 2-4h, and then conveying the material into an extruder;
step three: respectively installing a die for processing the air bag body, the top seat, the base, the air inlet cavity and the sounding block on the extruder, extruding the material into the die, cooling and shaping the material in the die;
step four: ejecting and collecting the formed product, then grinding and cutting the surface and the port to make the whole body smoother and cleaner, then adding the product into a cleaning box for soaking, adding an inorganic antibacterial agent into the cleaning box, taking out the product after soaking for 6-8h, and airing the product;
step five: and inspecting the dried product parts, splicing and installing the qualified product parts into a whole, and then packaging to complete the whole preparation process.
The invention has the technical effects and advantages that:
1. according to the invention, the antibacterial master batch is prepared by mixing the inorganic antibacterial agent and the plastic raw material, and then the antibacterial master batch and the plastic raw material are mixed and processed, so that the antibacterial master batch can be better integrated with the plastic raw material, and has a better antibacterial effect;
2. through being divided into a plurality of parts with the product and processing the back respectively and assemble again, can effectively reduce cooling forming and injection moulding's time, it shortens holistic process time to process the part respectively, and the production efficiency is improved, and can the disqualification at a certain position be convenient for adjust change after production assemble, can not lead to whole product abandonment, effectively reduce manufacturing cost, in addition, the gasbag body that has the buffering bag can effectively cushion and change the internal gas of gasbag that gets into, improve the sound shellfish that the sound production piece can send, it is more convenient to use, and be convenient for wash inside and change the part, guarantee holisticly clean and tidy.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a top view of the sound-emitting chamber of the present invention.
The reference signs are: 1 air bag body, 11 buffer bags, 2 top seats, 3 bases, 31 lantern rings, 4 air inlet cavities, 41 lantern rings, 5 sound outlet cavities, 6 sound producing blocks and 61 air guide blades.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
according to the plastic sound generator with the antibacterial master batch shown in the figures 1-2, the plastic sound generator comprises air bag bodies 1, the number of the air bag bodies 1 is two, a buffering bag 11 is uniformly arranged between the two air bag bodies 1, the tops and the bottoms of the two air bag bodies 1 are respectively provided with a top seat 2 and a base 3, the top of the top seat 2 is provided with an air inlet cavity 4, the bottom of the base 3 is provided with a sound outlet cavity 5, and a sound generation block 6 is arranged inside the sound outlet cavity 5.
The top of the inner wall of the air bag body 1 is provided with a threaded ring, and the top seat 2 is matched with the threaded ring.
The outer side of the top of the base 3 is provided with 31 around, and the 31 is connected with the outer wall of the air bag body 1 through screw threads.
The top surface of the air inlet cavity 4 is fixedly provided with a lantern ring 41, and the outer side of the air inlet cavity 4 is provided with the lantern ring 41 in a surrounding mode.
The outer side of the sounding block 6 is provided with a clamping groove in a surrounding manner, and the clamping groove is fixedly arranged inside the sounding cavity 5.
The inside wind guide blade 61 that is equipped with of sound production piece 6, wind guide blade 61 quantity sets up to a plurality ofly, wind guide blade 61 and the 6 inner wall sliding connection of sound production piece.
The implementation mode is specifically as follows: divide into a plurality of parts with the product and process the back respectively and assemble again, can effectively reduce cooling forming and injection moulding's time, it shortens holistic process time to process the part respectively, the production efficiency is improved, and can the disqualification of a certain position be convenient for adjust change after the production assemble, can not lead to whole product abandonment, effectively reduce manufacturing cost, in addition, gasbag body 1 that has buffer bag 11 can effectively cushion and change the gas that gets into in gasbag body 1, improve the sound shellfish that sound production piece 6 can send, it is more convenient to use, and be convenient for wash and change the part.
Example two:
a preparation method of a plastic sounder with antibacterial master batches comprises the following steps:
the method comprises the following steps: selecting different inorganic antibacterial agents according to the use environment of the product, adding the inorganic antibacterial agents into the plastic raw materials, mixing and stirring, continuously heating for 16 hours to enable the inorganic antibacterial agents and the raw materials to be mixed and to be in a molten state, injecting the molten material into a master batch granulator for granulation, and cooling and storing the processed master batches;
step two: adding the plastic raw material and the master batch into a reaction kettle for heating, continuously stirring in the heating process at a stirring speed of 60r/min for 4 hours, and conveying the material into an extruder;
step three: respectively installing and processing moulds of the air bag body 1, the top seat 2, the base 3, the air inlet cavity 4 and the sounding block 6 on an extruder, extruding materials into the moulds, cooling and forming the materials in the moulds;
step four: ejecting and collecting the formed product, then grinding and cutting the surface and the port to make the whole body smoother and cleaner, then adding the product into a cleaning box for soaking, adding an inorganic antibacterial agent into the cleaning box, taking out the product after soaking for 6 hours, and airing the product;
step five: and inspecting the dried product parts, splicing and installing the qualified product parts into a whole, and then packaging to complete the whole preparation process.
Example two:
a preparation method of a plastic sounder with antibacterial master batches comprises the following steps:
the method comprises the following steps: selecting different inorganic antibacterial agents according to the use environment of the product, adding the inorganic antibacterial agents into the plastic raw materials, mixing and stirring, continuously heating for 18 hours to enable the inorganic antibacterial agents to be mixed with the raw materials and to be in a molten state, injecting the molten material into a master batch granulator for granulation, and cooling and storing the processed master batches;
step two: adding the plastic raw material and the master batch into a reaction kettle for heating, continuously stirring in the heating process at a stirring speed of 90r/min for 2 hours, and then conveying the material into an extruder for extrusion;
step three: respectively installing and processing moulds of the air bag body 1, the top seat 2, the base 3, the air inlet cavity 4 and the sounding block 6 on an extruder, extruding materials into the moulds, cooling and forming the materials in the moulds;
step four: ejecting and collecting the formed product, then grinding and cutting the surface and the port to make the whole body smoother and cleaner, then adding the product into a cleaning box for soaking, adding an inorganic antibacterial agent into the cleaning box, taking out the product after soaking for 8 hours, and airing the product;
step five: and inspecting the dried product parts, splicing and installing the qualified product parts into a whole, and then packaging to complete the whole preparation process.
Example four:
a preparation method of a plastic sounder with antibacterial master batches comprises the following steps:
the method comprises the following steps: selecting different inorganic antibacterial agents according to the use environment of the product, adding the inorganic antibacterial agents into the plastic raw materials, mixing and stirring, continuously heating for 17 hours to enable the inorganic antibacterial agents to be mixed with the raw materials and to be in a molten state, injecting the molten material into a master batch granulator for granulation, and cooling and storing the processed master batches;
step two: adding the plastic raw material and the master batch into a reaction kettle for heating, continuously stirring in the heating process at a stirring speed of 75r/min for 3 hours, and conveying the material into an extruder;
step three: respectively installing and processing moulds of the air bag body 1, the top seat 2, the base 3, the air inlet cavity 4 and the sounding block 6 on an extruder, extruding materials into the moulds, cooling and forming the materials in the moulds;
step four: ejecting and collecting the formed product, then grinding and cutting the surface and the port to make the whole body smoother and cleaner, then adding the product into a cleaning box for soaking, adding an inorganic antibacterial agent into the cleaning box, taking out the product after soaking for 7 hours, and airing the product;
step five: and inspecting the dried product parts, splicing and installing the qualified product parts into a whole, and then packaging to complete the whole preparation process.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a plastics sounder with antibiotic master batch, includes the gasbag body (1), its characterized in that: gasbag body (1) quantity sets up to two, two evenly be equipped with between the gasbag body (1) buffering bag (11), two gasbag body (1) top and bottom are equipped with footstock (2) and base (3) respectively, footstock (2) top is equipped with into air cavity (4), base (3) bottom is equipped with out vocal chamber (5), it is equipped with sound production piece (6) to go out vocal chamber (5) inside.
2. The plastic sound generator with the antibacterial master batch according to claim 1, characterized in that: the top of the inner wall of the air bag body (1) is provided with a threaded ring, and the top seat (2) is matched with the threaded ring.
3. The plastic sound generator with the antibacterial master batch according to claim 1, characterized in that: the outer side of the top of the base (3) is provided with a lantern ring (31) in a surrounding mode, and the lantern ring (31) is in threaded connection with the outer wall of the air bag body (1).
4. The plastic sound generator with the antibacterial master batch according to claim 1, characterized in that: and the top surface of the air inlet cavity (4) is fixedly provided with a lantern ring (41), and the outer side of the air inlet cavity (4) is annularly provided with the lantern ring (41).
5. The plastic sound generator with the antibacterial master batch according to claim 1, characterized in that: the outer side of the sounding block (6) is provided with a clamping groove in a surrounding mode, and the clamping groove is fixedly arranged inside the sounding cavity (5).
6. The plastic sound generator with the antibacterial master batch according to claim 1, characterized in that: the sound production piece (6) is inside to be equipped with wind guide blade (61), wind guide blade (61) quantity sets up to a plurality ofly, wind guide blade (61) and sound production piece (6) inner wall sliding connection.
7. A preparation method of a plastic sounder with antibacterial master batches is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: selecting different inorganic antibacterial agents according to the use environment of the product, adding the inorganic antibacterial agents into the plastic raw materials, mixing and stirring, continuously heating for 16-18h to enable the inorganic antibacterial agents to be mixed with the raw materials and to be in a molten state, injecting the molten material into a master batch granulator for granulation, and cooling and storing the processed master batches;
step two: adding the plastic raw material and the master batch into a reaction kettle for heating, continuously stirring in the heating process at a stirring speed of 60-90r/min for 2-4h, and then conveying the material into an extruder;
step three: respectively installing a die for processing the air bag body (1), the top seat (2), the base (3), the air inlet cavity (4) and the sounding block (6) on an extruder, extruding the material into the die, cooling at 25-35 ℃, and continuously cooling for 4-6 hours to cool and form the material in the die;
step four: ejecting and collecting the formed product, then grinding and cutting the surface and the port to make the whole body smoother and cleaner, then adding the product into a cleaning box for soaking, adding an inorganic antibacterial agent into the cleaning box, taking out the product after soaking for 6-8h, and airing the product;
step five: and inspecting the dried product parts, splicing and installing the qualified product parts into a whole, and then packaging to complete the whole preparation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111302863.0A CN113926206A (en) | 2021-11-05 | 2021-11-05 | Plastic acoustic generator with antibacterial master batch and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111302863.0A CN113926206A (en) | 2021-11-05 | 2021-11-05 | Plastic acoustic generator with antibacterial master batch and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113926206A true CN113926206A (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111302863.0A Pending CN113926206A (en) | 2021-11-05 | 2021-11-05 | Plastic acoustic generator with antibacterial master batch and preparation method thereof |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7637795B1 (en) * | 2005-03-22 | 2009-12-29 | Dukart Michael J | Slide actuated animal call |
| US20120238180A1 (en) * | 2011-03-16 | 2012-09-20 | Cherokee Sports,LLC | Combination Wildlife Call |
| CN208014358U (en) * | 2018-03-21 | 2018-10-26 | 临沂宗沛斋工贸有限公司 | A kind of split type blow gun antibacterial Tao Di |
| CN109289211A (en) * | 2018-09-12 | 2019-02-01 | 苏州颗粒智能玩具有限公司 | A kind of production method of antibacterial educational toy |
| CN112675556A (en) * | 2020-12-30 | 2021-04-20 | 如皋市恒祥塑料有限公司 | Safe and environment-friendly plastic product sounder toy and production process thereof |
-
2021
- 2021-11-05 CN CN202111302863.0A patent/CN113926206A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7637795B1 (en) * | 2005-03-22 | 2009-12-29 | Dukart Michael J | Slide actuated animal call |
| US20120238180A1 (en) * | 2011-03-16 | 2012-09-20 | Cherokee Sports,LLC | Combination Wildlife Call |
| CN208014358U (en) * | 2018-03-21 | 2018-10-26 | 临沂宗沛斋工贸有限公司 | A kind of split type blow gun antibacterial Tao Di |
| CN109289211A (en) * | 2018-09-12 | 2019-02-01 | 苏州颗粒智能玩具有限公司 | A kind of production method of antibacterial educational toy |
| CN112675556A (en) * | 2020-12-30 | 2021-04-20 | 如皋市恒祥塑料有限公司 | Safe and environment-friendly plastic product sounder toy and production process thereof |
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Application publication date: 20220114 |