CN108437355B - Automatic sealing glue nozzle device - Google Patents
Automatic sealing glue nozzle device Download PDFInfo
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- CN108437355B CN108437355B CN201810240648.4A CN201810240648A CN108437355B CN 108437355 B CN108437355 B CN 108437355B CN 201810240648 A CN201810240648 A CN 201810240648A CN 108437355 B CN108437355 B CN 108437355B
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- glue
- sealing
- sealing piece
- nozzle
- cleaning hole
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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
- 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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/234—Valves opened by the pressure of the moulding material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses an automatic glue sealing nozzle device which comprises a nozzle body, a glue sealing piece and an elastic element, wherein a glue inlet channel, a containing cavity and a glue outlet channel which are communicated with each other are sequentially formed in the nozzle body along the conveying direction of a glue material; the glue sealing piece is movably arranged in the accommodating cavity and is provided with a sealing position for sealing the glue inlet channel and an opening position for opening the glue inlet channel; the elastic element is connected with the sealing piece and the nozzle body, and the sealing piece always has the trend of moving towards the sealing position under the elastic acting force of the elastic element. The automatic glue sealing nozzle device is simple in structure, glue sealing can be achieved without an additional control component, and glue sealing is convenient.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an automatic sealing glue nozzle device.
Background
At present, most of injection nozzles on injection molding machines are of single-hole glue-passing structures, namely, a through glue-passing hole is formed in each injection nozzle, and the glue-passing hole is only a channel for glue to pass through and has no glue-sealing function. The glue sealing function of the existing injection molding machine is generally integrated on a mold, a glue sealing device integrated on the mold is controlled to be opened and closed at the front end of a feed inlet of the mold by taking an air cylinder or an oil cylinder as a power source, the cost is high, the structure is complex, an additional control part is needed, the reliability is poor when the glue sealing device is combined with the mold, and the universality and the replaceability are not realized.
Disclosure of Invention
The invention aims to: provides an automatic glue sealing nozzle device which can realize automatic glue sealing and has low glue sealing difficulty.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic glue sealing nozzle device is provided, which comprises:
the glue injection nozzle comprises a nozzle body, wherein a glue inlet channel, a containing cavity and a glue outlet channel which are communicated with each other are sequentially formed in the nozzle body along the conveying direction of a glue material;
the glue sealing piece is movably arranged in the accommodating cavity and is provided with a sealing position for sealing the glue inlet channel and an opening position for opening the glue inlet channel;
the elastic element is connected with the glue sealing piece and the nozzle body, and the glue sealing piece always has the tendency of moving towards the blocking position under the elastic acting force of the elastic element.
As a preferred scheme of the automatic glue sealing nozzle device, the glue sealing member has a first end of the glue sealing member and a second end of the glue sealing member which are oppositely arranged, the periphery of the first end of the glue sealing member is tapered to form a first tapered surface, one end of the glue inlet channel close to the accommodating cavity is provided with a glue sealing groove which is in plug-in fit with the first end of the glue sealing member, and when the glue sealing member is located at the sealing position, the first tapered surface is tightly attached to the groove wall of the glue sealing groove.
As a preferred scheme of the automatic glue sealing nozzle device, a limiting seat is arranged in the accommodating cavity, a plurality of glue passing holes are annularly arranged on the periphery of the limiting seat, one end of each glue passing hole is communicated with the accommodating cavity, and the other end of each glue passing hole is communicated with the glue outlet channel;
the elastic element is arranged between the limiting seat and the sealing piece.
As a preferred scheme of the automatic glue sealing nozzle device, a first glue cleaning hole is formed in the end face of the second end of the glue sealing piece along the axis of the glue sealing piece, the first glue cleaning hole does not penetrate through the glue sealing piece, at least two second glue cleaning holes are annularly formed in the first conical surface along the axis of the glue sealing piece, and each second glue cleaning hole extends towards the axis of the glue sealing piece and is communicated with the first glue cleaning hole.
As a preferable scheme of the automatic glue sealing nozzle device, an arc transition surface is arranged at a position where the first glue cleaning hole is connected with the second glue cleaning hole.
As a preferred scheme of the automatic glue sealing nozzle device, a third glue cleaning hole is formed in the center of the limiting seat in a penetrating manner, and two ends of the third glue cleaning hole are respectively communicated with the first glue cleaning hole and the glue outlet channel.
As a preferred scheme of the automatic glue sealing nozzle device, a first step surface and a second step surface are arranged on the periphery of the glue sealing piece at intervals along the axial direction of the glue sealing piece;
the limiting seat faces towards one side of the rubber sealing piece, a limiting groove is concavely arranged, the elastic element is a spring, one end of the spring is abutted to the bottom of the limiting groove, the other end of the spring is abutted to the second step surface, and the spring is sleeved on the periphery of the second end of the rubber sealing piece.
As a preferred scheme of the automatic glue sealing nozzle device, the second end of the glue sealing member is inserted into the limiting groove, and the end surface of the limiting seat, which is provided with one end of the limiting groove, is abutted against the first step surface.
As an optimal scheme of the automatic glue sealing and injecting device, the nozzle body comprises a nozzle tail part, a glue passing part and a nozzle head part which are sequentially arranged, the glue inlet channel is arranged at the nozzle tail part, the accommodating cavity is arranged in the glue passing part, the glue outlet channel is arranged at the nozzle head part, and the nozzle tail part is detachably connected with the glue passing part.
As a preferable scheme of the automatic glue sealing nozzle device, the nozzle head part and the glue passing part are detachably connected.
The embodiment of the invention has the beneficial effects that: through this internal mobilizable piece of gluing that seals that sets up of nozzle, seal the gluey passageway of a shutoff all the time of gluing under elastic element's effect, realize sealing automatically, penetrating gluey in-process, the inside sizing material of a sol section of thick bamboo receives outside and penetrates gluey thrust for the pressure of carrying to the sizing material of advancing in the gluey passageway is greater than elastic element's elasticity, seals gluey piece this moment and is promoted to the open position by the sizing material, realizes whole penetrating mouth device and penetrates gluey action. The automatic glue sealing nozzle device is simple in structure, glue sealing can be achieved without an additional control component, and glue sealing is convenient.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic cross-sectional view of a first view angle of an automatic molding nozzle device according to the present invention.
Fig. 2 is a schematic cross-sectional view of a second view of the automatic molding nozzle device of the present invention.
Fig. 3 is an exploded view of fig. 2.
In the figure:
1. the tail part of the nozzle; 11. a glue inlet channel; 12. sealing a glue groove; 2. a glue passing part; 21. an accommodating chamber; 22. a limiting seat; 221. passing through a glue hole; 222. a third glue cleaning hole; 223. a limiting groove; 3. a nozzle head; 31. a glue outlet channel; 4. sealing the rubber piece; 41. a first end of the glue sealing member; 42. a second end of the glue sealing member; 43. a first tapered surface; 44. a first glue cleaning hole; 45. a second glue cleaning hole; 46. a first step surface; 47. a second step surface; 5. a spring.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 3, an embodiment of the present invention provides an automatic adhesive sealing nozzle device, which includes a nozzle body, an adhesive sealing member 4, and an elastic element, wherein a glue inlet channel 11, an accommodating cavity 21, and a glue outlet channel 31, which are communicated with each other, are sequentially formed in the nozzle body along a conveying direction of a glue material, the adhesive sealing member 4 is movably disposed in the accommodating cavity 21, and has a sealing position for sealing the glue inlet channel 11 and an opening position for opening the glue inlet channel 11, the elastic element connects the adhesive sealing member 4 and the nozzle body, and the adhesive sealing member 4 always has a tendency of moving toward the sealing position under an elastic force of the elastic element. Through this internal mobilizable gluey piece 4 that seals that sets up of nozzle, seal gluey piece 4 and seal all the time and advance gluey passageway 11 under elastic element's effect, realize automatic sealing glue, at penetrating gluey in-process, the inside sizing material of sol section of thick bamboo receives outside and penetrates gluey thrust for the pressure of carrying to the sizing material of advancing in gluey passageway 11 is greater than elastic element's elasticity, seals gluey piece 4 this moment and is promoted to the open position by the sizing material, realizes whole penetrating mouth device and penetrates gluey action. The automatic glue sealing nozzle device is simple in structure, glue sealing can be achieved without an additional control component, and glue sealing is convenient.
In this embodiment, penetrate the mouth body including the mouth afterbody 1 that penetrates that connects gradually, cross gluey portion 2 and penetrate mouth head 3, wherein, penetrate to set up in the mouth afterbody 1 and advance gluey passageway 11, cross to penetrate to set up in gluey portion 2 and hold chamber 21, penetrate mouth head 3 and penetrate to set up out gluey passageway 31, and penetrate mouth afterbody 1 and be connected with the one end detachably of crossing gluey portion 2, penetrate mouth head 3 and the other end detachably who crosses gluey portion 2 is connected. The above design makes the sealing member 4 and the elastic member disposed in the accommodating chamber 21 easier to install and replace, and also facilitates cleaning the inside of the nozzle device.
Further, the periphery of the one end of penetrating mouth afterbody 1 sets up first external screw thread, cross the portion of gluing 2 hold the intracavity 21 set up with first external screw thread complex first internal thread, penetrate the one end of mouth afterbody 1 extend to hold the intracavity 21 and with hold the chamber 21 screw thread and connect soon, in order to prevent to penetrate 1 inserted position of mouth afterbody and exceed the requirement, set up first spacing step holding the intracavity 21, penetrate that mouth afterbody 1 inserts the first spacing step of terminal surface butt that holds the one end of chamber 21. In addition, the periphery of nozzle afterbody 1 and be located one side that first external screw thread kept away from first spacing step and set up the bulge loop, when nozzle afterbody 1 revolves soon to the end (when nozzle afterbody 1 inserts the terminal surface and the first spacing step butt of the one end that holds chamber 21), this bulge loop sets up with the terminal surface interval of crossing gluey portion 2.
Cross the periphery that gluey portion 2 kept away from the one end of penetrating mouth afterbody 1 and set up the second external screw thread, penetrate the inner wall setting of the play gluey passageway 31 of mouth head 3 and with the second external screw thread complex second internal thread, cross gluey portion 2 and keep away from the one end of penetrating mouth afterbody 1 and insert in play gluey passageway 31 and with penetrating mouth head 3 screw thread and connect soon. Set up the spacing step of second in the play passageway 31 of gluing of nozzle head 3, when crossing gluey portion 2 and revolve to play gluey passageway 31 in, cross the terminal surface and the spacing step butt of second of gluey portion 2 one end of keeping away from nozzle afterbody 1.
The injection nozzle tail part 1 and the injection nozzle head part 3 are not limited to be detachably connected with the glue passing part 2, one of the injection nozzle tail part and the injection nozzle head part can be detachably connected with the glue passing part 2, and the other part is integrally cast or injection molded with the glue passing part 2. The connection mode of the three is not limited to threaded connection, but also can be other detachable modes such as clamping connection and the like.
In a preferred embodiment of the present invention, the sealant 4 has a first sealant end 41 and a second sealant end 42 which are opposite to each other, the periphery of the first sealant end 41 is tapered to form a first tapered surface 43, one end of the sealant inlet channel 11 close to the accommodating cavity 21 has a sealant groove 12 which is in insertion fit with the first sealant end 41, and when the sealant 4 is located at the sealing position, the first tapered surface 43 is tightly attached to a groove wall of the sealant groove 12. Through setting up to the toper structure with sealing gluey piece first end 41 to the part that will advance gluey passageway 11 and be close to and hold chamber 21 sets up to the cell type structure with this toper structure grafting complex, the laminating of toper face and face makes sealing gluey piece 4 be located the shutoff position more steadily, and the toper structure can also be sealed gluey piece 4 and lead when removing to the shutoff position by opening the position, guarantees to seal gluey piece 4 and can accurately remove to the shutoff position all the time.
The periphery of the second end 42 of the glue sealing member is tapered to form a second tapered surface, a groove with a tapered structure is arranged in the glue outlet channel 31 of the nozzle head 3 corresponding to the second tapered surface, the side wall of the groove and the second tapered surface are arranged at intervals, and glue material passes through the groove and the second tapered surface.
In another preferred embodiment of the present invention, a limiting seat 22 is disposed in the accommodating cavity 21, a plurality of glue passing holes 221 are annularly disposed on a peripheral portion of the limiting seat 22, one end of each glue passing hole 221 is communicated with the accommodating cavity 21, the other end is communicated with the glue outlet channel 31, and the elastic element is disposed between the limiting seat 22 and the glue sealing member 4. Through setting up spacing seat 22, can fix elastic element, and the glue hole 221 of crossing that sets up on spacing seat 22 is mainly used for sealing that the piece 4 of glue is when being located the open position, leads to the sizing material, makes the sizing material that enters into holding chamber 21 from advancing gluey passageway 11 can be carried to out gluey passageway 31 smoothly.
Further, the end face of the second end 41 of the glue sealing member is provided with a first glue cleaning hole 44 along the axis of the glue sealing member 4, the first glue cleaning hole 44 does not penetrate through the glue sealing member 4, two second glue cleaning holes 45 are annularly arranged on the first conical surface 43 along the axis of the glue sealing member 4, and each second glue cleaning hole 45 obliquely extends towards the axis direction of the glue sealing member 5 and is communicated with the first glue cleaning hole 44.
A third glue cleaning hole 222 is formed in the center of the limiting seat 22 in a penetrating manner, and two ends of the third glue cleaning hole 222 are respectively communicated with the first glue cleaning hole 44 and the glue outlet channel 31. Through setting up clear gluey hole, can utilize the sizing material of high-speed flow to clear away the sizing material that gathers outside or inside the elastic element in the in-process of shooting the gluey, prevent that the sizing material from gathering under the high temperature and producing the condition of carbomorphism.
In addition, an arc transition surface is arranged at the connection position of the first glue cleaning hole 44 and the second glue cleaning hole 45. Because the axis of first clear gluey hole 44 and second clear gluey hole 45 is the contained angle structure, so the circular arc transition surface can prevent that the sizing material from piling up, guarantees that the sizing material circulation is smooth and easy.
The clear gluey hole 45's of second quantity is not limited to being two, still can be for three or more than three, when setting up the clear gluey hole 45 of second, the clear gluey hole 45 of second of even setting can guarantee to seal and glue piece 4 and do not take place axis skew or slope when removing, guarantees that whole penetrating gluey process does not block gluey, and it is smooth and easy promptly to go out to glue.
In another preferred embodiment of the present invention, the periphery of the rubber sealing member 4 is provided with a first step surface 46 and a second step surface 47 at intervals along the axial direction of the rubber sealing member 4, one side of the limiting seat 22 facing the rubber sealing member 4 is concavely provided with a limiting groove 223, the elastic element is a spring 5, one end of the spring 5 abuts against the groove bottom of the limiting groove 223, the other end abuts against the second step surface 47, and the spring 5 is sleeved on the periphery of the second end 42 of the rubber sealing member.
Through setting up spacing groove 223, spacing groove 223 can restrict the removal of spring 5, guarantees that spring 5 can only push along the axis direction of gluing spare 4 and seals gluey piece 4, perhaps seals gluey piece 4 and can only compress this spring 5 along its axis direction, and whole process guarantees to seal the motion of gluing spare 4 and does not squint. Spring 5 can carry out the apolegamy and change according to actual production needs, and whole device does not need outside independent control, and is convenient simple after the installation.
In the present embodiment, the axis of the sealant member 4 coincides with the axes of the sealant inlet channel 11, the accommodating cavity 21 and the sealant outlet channel 31.
Further, the second end 42 of the glue sealing member is inserted into the limiting groove 223, and the end surface of the limiting seat 22, which is provided with one end of the limiting groove 223, abuts against the first step surface 46.
In the description herein, it is to be understood that the terms "upper" and the like are based on the orientation or positional relationship shown in the drawings, which are for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
In the description herein, references to the term "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (7)
1. The utility model provides an automatic seal and glue mouth device of penetrating which characterized in that includes:
the glue injection nozzle comprises a nozzle body, wherein a glue inlet channel, a containing cavity and a glue outlet channel which are communicated with each other are sequentially formed in the nozzle body along the conveying direction of a glue material;
the glue sealing piece is movably arranged in the accommodating cavity and is provided with a sealing position for sealing the glue inlet channel and an opening position for opening the glue inlet channel;
the elastic element is connected with the glue sealing piece and the nozzle body, and the glue sealing piece always has a trend of moving towards the blocking position under the elastic acting force of the elastic element;
the glue sealing piece is provided with a first glue sealing piece end and a second glue sealing piece end which are arranged oppositely, the periphery of the first glue sealing piece end is conical to form a first conical surface, one end of the glue inlet channel, which is close to the accommodating cavity, is provided with a glue sealing groove which is in plug fit with the first glue sealing piece end, and when the glue sealing piece is located at the plugging position, the first conical surface is tightly attached to the groove wall of the glue sealing groove;
a limiting seat is arranged in the accommodating cavity, a plurality of glue passing holes are annularly arranged on the peripheral part of the limiting seat, one end of each glue passing hole is communicated with the accommodating cavity, and the other end of each glue passing hole is communicated with the glue outlet channel;
the elastic element is arranged between the limiting seat and the sealing piece;
the end face of the second end of the glue sealing piece is provided with a first glue cleaning hole along the axis of the glue sealing piece, the first glue cleaning hole does not penetrate through the glue sealing piece, the first conical surface is annularly provided with at least two second glue cleaning holes along the axis of the glue sealing piece, and each second glue cleaning hole extends towards the axis direction of the glue sealing piece and is communicated with the first glue cleaning hole.
2. The apparatus as claimed in claim 1, wherein a circular arc transition surface is disposed at a connection position of the first glue cleaning hole and the second glue cleaning hole.
3. The nozzle device of claim 1, wherein a third glue cleaning hole is formed through a center of the limiting seat, and two ends of the third glue cleaning hole are respectively communicated with the first glue cleaning hole and the glue outlet channel.
4. The automatic glue-sealing nozzle device as claimed in claim 1, wherein the periphery of the glue sealing member is provided with a first step surface and a second step surface at intervals along the axial direction of the glue sealing member;
the limiting seat faces towards one side of the rubber sealing piece, a limiting groove is concavely arranged, the elastic element is a spring, one end of the spring is abutted to the bottom of the limiting groove, the other end of the spring is abutted to the second step surface, and the spring is sleeved on the periphery of the second end of the rubber sealing piece.
5. The automatic nozzle device for sealing adhesive as claimed in claim 4, wherein the second end of the sealing member is inserted into the limiting groove, and an end surface of the limiting seat at an end thereof where the limiting groove is opened abuts against the first step surface.
6. The automatic glue sealing nozzle device according to any one of claims 1 to 5, wherein the nozzle body comprises a nozzle tail portion, a glue passing portion and a nozzle head portion, the glue inlet channel is disposed at the nozzle tail portion, the accommodating cavity is disposed in the glue passing portion, and the glue outlet channel is disposed at the nozzle head portion, wherein the nozzle tail portion and the glue passing portion are detachably connected.
7. The automatic molding nozzle device of claim 6, wherein the nozzle head and the adhesive-passing portion are detachably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810240648.4A CN108437355B (en) | 2018-03-22 | 2018-03-22 | Automatic sealing glue nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810240648.4A CN108437355B (en) | 2018-03-22 | 2018-03-22 | Automatic sealing glue nozzle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108437355A CN108437355A (en) | 2018-08-24 |
| CN108437355B true CN108437355B (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810240648.4A Active CN108437355B (en) | 2018-03-22 | 2018-03-22 | Automatic sealing glue nozzle device |
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| CN (1) | CN108437355B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549490A (en) * | 2023-12-28 | 2024-02-13 | 博创智能装备股份有限公司 | Integral pressure-maintaining injection nozzle of injection molding machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324930A (en) * | 1989-06-22 | 1991-02-01 | Sekisui Chem Co Ltd | Nozzle apparatus for injection molding |
| CN1024453C (en) * | 1991-06-08 | 1994-05-11 | 谢桂深 | Combined automatic injection nozzle with anti-reflux and anti-leak junction |
| JP4538281B2 (en) * | 2004-02-05 | 2010-09-08 | フィーサ株式会社 | Valve nozzle |
| CN201120698Y (en) * | 2007-10-18 | 2008-09-24 | 尔信机械(江门)有限公司 | Self-locking nozzle sealing mechanism for ejection shaping apparatus injection nozzle |
| US8734146B2 (en) * | 2010-10-20 | 2014-05-27 | Michael F Durina | Miniature automatic shutoff nozzle tip |
| CN203945571U (en) * | 2014-07-25 | 2014-11-19 | 宁波威瑞精密机械有限公司 | Novel injection nozzle structure |
| CN205380831U (en) * | 2016-01-14 | 2016-07-13 | 积康螺杆制造（上海）股份有限公司 | Mouth is penetrated to inner spring of control by temperature change heating |
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2018
- 2018-03-22 CN CN201810240648.4A patent/CN108437355B/en active Active
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