CN102476426B - Zero-pressure-holding anti-leakage plastic nozzle - Google Patents
Zero-pressure-holding anti-leakage plastic nozzle Download PDFInfo
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- CN102476426B CN102476426B CN201010559352.2A CN201010559352A CN102476426B CN 102476426 B CN102476426 B CN 102476426B CN 201010559352 A CN201010559352 A CN 201010559352A CN 102476426 B CN102476426 B CN 102476426B
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- plastic cement
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Abstract
The invention relates to a zero-pressure-holding anti-leakage plastic nozzle of an injection molding machine, which comprises an outer nozzle body and a spout arranged at the front end of the outer nozzle body. A plastic channel is axially arranged inside the outer nozzle body, a first valve spool for preventing plastic liquid from flowing back is arranged in the plastic channel, the plastic channel is provided with an inner cavity space which is positioned in the section of the first valve spool and is in a shape corresponding to that of the first valve spool, the first valve spool is a cake with an axially through middle and comprises a first side and a second side opposite to the first side, the first side and the second side are axially and sequentially arranged, the second side is provided with a notch for the plastic liquid to flow forwards, a second valve spool for preventing the plastic liquid from leaking is arranged in the plastic channel and penetrates through the middle of the first valve spool, the tapered front end of the second valve spool plugs the spout, and a spring assembly is arranged at the rear end of the second valve spool. The zero-pressure-holding anti-leakage plastic nozzle is capable of effectively solving the problems of high energy consumption of a pressurizing process and leakage of plastic liquid, is extremely environment-friendly and reduces energy consumption.
Description
Technical field
The present invention relates to a kind of injection-moulding device, more particularly, relate to a kind of zero pressure-holding anti-leakage plastic nozzle of injection machine.
Background technology
Injection machine is a kind of special plastic molding machinery, and it utilizes the thermoplasticity of plastics, and after heat fused, more in addition pressure makes it flow into fast die cavity, through the pressurize of a period of time and cooling, is called the plastic products of various shapes.The now typical technological process of common injection machine is: matched moulds, penetrate platform location, preformed, injection, pressurize and cooling, die sinking.Injection machine is in process, and in order to ensure the quality of injection moulding workpiece, when injection machine completes after injection, the screw rod in its screw in injection molding machine cylinder still needs the pressure that provides in position very big and suitable to carry out pressurize.After injection pressurize program completes, screw rod continues for the second time to rotate and prepares for next technique, and while converging plastic cement liquid to certain volume, machine carries out next driven by program, and the interior product of die cavity is cooling, die sinking, take off finished product etc.
In Shooting Technique, pressurize is very crucial, and its Main Function is to prevent that plastic cement liquid from refluxing, and makes product approval.In injection molding process process, pressurize is the link of energy resource consumption maximum.Prior art pressurizer is mainly that the pressurizer of injection machine is one with pre-molding apparatus, is conventionally completed by screw rod, and this arrangement works cycle period is long, and production efficiency is very low.
After pressurize finishes, when nozzle separates with mould gate, the defect that the plastic jet nozzle of existing injection machine exists is the pressure that the pressure in mould is significantly less than the plastic cement passage of nozzle, due to the poor existence of external and internal pressure, the nozzle of plastic cement channel outlet can constantly leak and overflow glue, affect the running of injection machine mould, destroy mould.
Summary of the invention
The technical problem to be solved in the present invention is,, plastic jet nozzle high for pressurize process energy consumption in prior art injection molding process has plastic cement liquid to leak ejection after pressurize finishes affects the defect of injection machine continuous operations, a kind of zero pressurize plastic jet nozzle is provided, can be fine the power consumption of solution pressurize technique is high, plastic cement liquid leaks problem.
The technical solution adopted for the present invention to solve the technical problems is: a kind of zero pressure-holding anti-leakage plastic nozzle, comprise the outer body of nozzle, be arranged on the spout of the outer body front end of described nozzle, outside described nozzle, body inside is provided with plastic cement passage vertically, in described plastic cement passage, be provided with the first spool for stoping plastic cement liquid to reflux, described plastic cement passage has the intracavity space corresponding with the shape of described the first spool in the first spool place section; Described the first spool is the pan that middle part connects vertically, the second side that described the first spool comprises the first side of setting gradually vertically, is oppositely arranged with described the first side, described the second side place is provided with the fluting circulating forward for plastic cement liquid, or is provided with fluting on the contact-making surface that outside described nozzle, body coordinates with described the first spool; In described plastic cement passage, be provided with the second spool for preventing that plastic cement liquid from leaking; Described the second spool runs through by described the first spool middle part, and front end is spout described in conical surface shape shutoff, and rear end is provided with spring assembly.
The present invention's zero pressure-holding anti-leakage plastic nozzle, preferably, described the second spool front-end-cone angle is less than or equal to 35 degree.
The present invention's zero pressure-holding anti-leakage plastic nozzle, preferably, described spring assembly comprises vertically the spring that arranges, is arranged on the forestock locating part of described spring at front end and is arranged on the butt locating part of described spring rear end; Described the second spool rear end connects described forestock locating part and is fixedly connected with described spring.
The present invention's zero pressure-holding anti-leakage plastic nozzle, preferably, described the first side and the second side are the taper surface that angle between nozzle-axis is less than 90 degree.
The present invention's zero pressure-holding anti-leakage plastic nozzle, preferably, described the first spool and the second spool are positioned at the front end of described plastic cement passage, are also provided with plastic cement liquid filter in the rear end of described plastic cement passage.
The present invention's zero pressure-holding anti-leakage plastic nozzle, preferably, is provided with plastic cement and turns to supporting tight part in described plastic cement passage, described plastic cement turns to supporting tight part between described plastic cement liquid filter and described the first spool.
The present invention can reach following beneficial effect: adopt the present invention's zero pressurize plastic jet nozzle, owing to being provided with the first spool in plastic cement passage, when injection moulding is sprayed, plastic cement liquid can spray into forward injection molding cavity, and in the time spraying end, the first spool is by plastic cement passage plugging, high pressure plastic cement liquid in injection molding cavity cannot be refluxed to injection machine, thereby ensure the Forming Quality of moulding, also made the injection machine must pressurize (carrying out zero pressurize) after injection completes, greatly saved energy resource consumption.In plastic cement passage, be provided with the second spool, the second spool rear end linking springs assembly, front end becomes taper shutoff spout.Under normality, the second spool is at spring assembly effect lower front end shutoff spout; In injection plastic cement process, plastic cement pressure-acting, in the front end conical surface, is pushed the second spool open vertically, spring contraction, and spout is opened, and normally carries out plastic cement injection; Plastic cement sprays and finishes, plastic rubber shaping in injection molding cavity, and injection molding cavity internal pressure reduces, act on the second spool front-end-cone surface pressure and reduce, spring resiles gradually, the second spool shutoff spout that moves forward vertically, while effectively preventing that nozzle from separating with mould gate, plastic cement liquid leaks and overflows.
Accompanying drawing invention
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the cross-sectional schematic of zero pressure-holding anti-leakage plastic nozzle of the present invention;
Fig. 2 is the assembling schematic diagram that nozzle body, shower nozzle and the plastic cement of zero pressure-holding anti-leakage plastic nozzle of the present invention turns to supporting tight part;
Fig. 3 is the assembling schematic diagram that the nozzle body of zero pressure-holding anti-leakage plastic nozzle of the present invention and plastic cement turn to supporting tight part;
Fig. 4 is that the plastic cement of zero pressure-holding anti-leakage plastic nozzle of the present invention turns to the main schematic diagram of looking of analysing and observe of supporting tight part;
Fig. 5 is that the plastic cement of zero pressure-holding anti-leakage plastic nozzle of the present invention turns to a left side for supporting tight part to look schematic diagram;
Fig. 6 is the exploded perspective view of the first spool, the second spool and the valve core housing of zero pressure-holding anti-leakage plastic nozzle of the present invention;
Fig. 7 is the combination schematic diagram of the first spool, the second spool and the valve core housing of zero pressure-holding anti-leakage plastic nozzle of the present invention;
Fig. 8 is the cross-sectional schematic of the shower nozzle of zero pressure-holding anti-leakage plastic nozzle of the present invention;
Fig. 9 is the cross-sectional schematic of the shower nozzle embodiment bis-of zero pressure-holding anti-leakage plastic nozzle of the present invention;
Figure 10 is the exploded perspective view of the first spool, the second spool and the valve core housing embodiment bis-of zero pressure-holding anti-leakage plastic nozzle of the present invention;
In figure
1, the outer body 2 of nozzle, spout
3, plastic cement passage 4, the first spool
5, the first side 6, the second side
7, fluting 8, the second spool
9, spring assembly 10, the conical surface
11, spring 12, forestock locating part
13, butt locating part 14, plastic cement liquid filter
15, plastic cement turns to supporting tight part 16, fixed bar
17, clamping mechanism 18, injection molding cavity
19, valve core housing the first inwall 20, valve core housing the second inwall
21, shower nozzle inwall 22, valve core housing
23, through hole 24, guiding gutter
25, valve core housing installation position 26, external screw thread
27, shower nozzle 28, nozzle body
29, shower nozzle fluting
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Embodiment mono-
As shown in Figure 1, a kind of zero pressure-holding anti-leakage plastic nozzle of the present invention, comprises the outer body 1 of nozzle, and the outer body 1 of nozzle comprises nozzle body 28, the shower nozzle 27 being fixedly connected with by screw thread 26 with nozzle body 28 and the injection molding body being fixedly connected with nozzle body 28.In injection molding body, be fixedly installed plastic cement liquid filter 14, the front end of shower nozzle 28 is provided with spout 2, and outside nozzle, body 1 inside is provided with plastic cement passage 3 vertically.In plastic cement passage 3, be provided with the first spool 4 for stoping plastic cement liquid to reflux, plastic cement passage 3 has the intracavity space corresponding with the shape of described the first spool in the first spool 4 place sections.The first spool 4 is the pan that middle part connects vertically, and 6 places, 6, the second side, the second side that it comprises the first side 5 of setting gradually vertically, be oppositely arranged with the first side 5 are provided with the fluting 7 circulating forward for plastic cement liquid.In plastic cement passage 3, be provided with for preventing that the second spool 8, the second spools 8 that plastic cement liquid leaks from running through by the first spool 4 middle parts, front end is conical surface shape shutoff spout 2, and rear end is provided with spring assembly 9.
As shown in Figure 1, the front end of the present invention's zero pressure-holding anti-leakage plastic nozzle matches with clamping mechanism 17, is provided with injection molding cavity 18 in clamping mechanism, and the front end of plastic cement passage 3 is communicated with injection molding cavity by spout 2.
In plastic cement passage 3, be provided with plastic cement and turn to supporting tight part 15, as shown in figures 1 and 3, plastic cement turns to supporting tight part 15 for to be provided with the patty structure that turns to passage, between nozzle body 28 and shower nozzle 27.
Further, in order to realize the flow direction commutation of plastic cement liquid, as shown in Figure 4 and Figure 5, plastic cement turns to supporting tight part 15 to be provided with the through hole 23 of four inclinations, and plastic cement turns on the end face of supporting tight part 15 and is provided with drainage trough 24.After plastic cement liquid in nozzle body 28 flows out, flow in through hole 23 through the water conservancy diversion of drainage trough 24.Plastic cement turns to supporting tight part 15 1 ends to be provided with valve core housing installation position 25.
As shown in Figure 3, for nozzle body 28 and plastic cement turn to being connected of supporting tight part 15, the flow direction of plastic cement liquid from plastic cement turn to supporting tight part 15 start transition flow to.
The first spool 4 and the second spool 8 are arranged in the inner chamber of the outer body 1 of nozzle, and the outer body 1 of nozzle comprises nozzle body 28 and shower nozzle 27, and the entirety that nozzle body 28 is fixedly connected to form with shower nozzle 27 is connected with injection machine.As shown in Figure 1, be also provided with plastic cement liquid filter 14 in the rear end of plastic cement passage 3.Filter 14 adopts cylindric stereo filter, and its front end is hemispherical, is provided with the filtering holes of inside and outside conducting on filter 14.Plastic cement liquid, before entering injection molding cavity 18, after filtration, can be removed impurity, avoids spray nozzle clogging, can improve moulding quality simultaneously.
As shown in Figure 6 and Figure 7, the first spool 4 is provided with the pan of fixed bar 16 for one end, and pie core body and fixed bar 16 middle parts connect, pie core body comprise circumference side and be oppositely arranged and with the first side 5 and second side 6 of circumference side adjacency.The first side 5 and the second side 6 are angle between nozzle-axis and are slightly less than the taper surface of 90 degree, and 6 places, the second side are provided with the fluting 7 circulating forward for plastic cement liquid.Such shape, had both been conducive to the conveying of plastic cement liquid, can ensure that again the first spool 4 locates in fore-and-aft direction in needs, while moulding gelatin jet, located in the second side 6, locates and stop plastic cement liquid to reflux after having sprayed in the first side 5.
Further, for ensure the first side 5 of the first spool 4 can realize well plastic cement liquid reflux time cutoff function, be provided with valve core housing 22, valve core housing 22 and the first spool 4 are suitable.As shown in Figure 6, valve core housing 22 comprises valve core housing the first inwall 19, and valve core housing the first inwall 19 is corresponding with the first side 5 of the first spool 4, and two faces can be fitted completely and be realized plastic cement liquid backflow cut-off.Valve core housing 22 also comprises valve core housing the second inwall 20, and the external diameter of valve core housing the second inwall 20 to the first spools 4 is bigger.
Further, the first spool 4, the second spool 8 turn in supporting tight part 15 engagement process with plastic cement, and as shown in Figure 7, the second spool 8 turns to supporting tight part 15 and passes from the first spool 4, plastic cement, the first spool 4 coordinates with valve core housing 22, and valve core housing 22 screens are in valve core housing installation position 25.
Further, as shown in Figure 8, shower nozzle 27 has inner cavity chamber, and inner cavity chamber is provided with shower nozzle inwall 21, and this shower nozzle inwall 21 contacts cooperation with the second side 6 of the first spool 4.In injection moulding process, fit in shower nozzle inwall 21 and the second side 6, after flowing through in the fluting of plastic cement liquid from the second side 6, and ejection from spout 2.
Further, be provided with for preventing that the second spool 8, the second spools 8 that plastic cement liquid leaks from running through by the first spool 4 middle parts in plastic cement passage 3, the first spool 4 front and back on the second spool 8 are coaxial mobile.The second spool 8 front ends are conical surface shape shutoff spout 2, and the cone angle of its front end conical surface 10 is below 35 degree.The second spool 8 front ends are the conical surface, and its effect is in injection plastic cement process, and plastic cement pressure-acting is on the conical surface 10, and the second spool 8 moves after under plastic cement pressure-acting, and spout 2 is opened, and plastic cement sprays and enters injection molding cavity 18.
As shown in Figure 1, the second spool 8 rear ends are provided with spring assembly 9, and spring assembly 9 comprises vertically the spring 11 that arranges, is arranged on the forestock locating part 12 of spring 11 front ends and is arranged on the butt locating part 13 of spring rear end; The second spool 8 rear ends connect forestock locating part 12 and are fixedly connected with spring 11.Plastic jet nozzle is not spraying under the state of plastic cement liquid, and the second spool 8 is under the effect of spring assembly 9, and the front end conical surface is shutoff spout 2 all the time; In injection plastic cement process, plastic cement pressure-acting is on the conical surface 10, and the second spool 8 moves after under plastic cement pressure-acting, and spout 2 is opened, and plastic cement sprays and enters injection molding cavity 18; Plastic cement liquid is after the interior moulding of injection molding cavity 18, and injection molding cavity 18 internal pressures reduce sharply, and the second spool 8 moves forward under spring assembly effect, and spout 2 recovers sealed condition.
Below the course of work of plastic jet nozzle of the present invention is described below: in the time starting injection, plastic cement liquid flows along the rear end forward end of plastic cement passage 3, first filter through filter 14, plastic cement liquid after filtering turns to supporting tight part 15 to change through plastic cement and flows to, increase plastic cement liquid speed, promoting the first spool 4 moves forward, the second side 6 of the first spool 4 is contacted with the shower nozzle inwall 21 of plastic cement passage 3, plastic cement liquid is along the first side 5 of the first spool 4 and the space of the circumference side of the first spool 4 and plastic cement passage 3 respective valve core retainer plate the second inwalls 20, enter the fluting 7 on the second side of the first spool 4.Plastic cement liquid arrives after the front end of plastic cement passage 3, and hydraulic action is on the front end conical surface 10 of the second spool 8, and the second spool 8 moves after under plastic cement pressure-acting, and spout 2 is opened, and plastic cement sprays and enters injection molding cavity 18.
Further, after injection moulding has been sprayed, the rear end pressure disappearance of plastic cement passage 3 (carrying out zero pressurize), plastic cement liquid in injection molding cavity has larger pressure at the injection mo(u)lding initial stage, produced a kind of trend refluxing to plastic cement passage 3, the first spool 4, under the pressure-acting of backflow plastic cement liquid, moves backward, until the first side 5 of the first spool 4 fits completely with valve core housing first inwall 19 of corresponding plastic cement passage 3, stoped plastic cement liquid to the back-end direction reflux.
Further, in the time that profiled member removes from injection molding cavity Central Plains station, next time before injection beginning, injection molding cavity internal pressure reduces sharply, the pressure that acts on the second spool 8 front end conical surfaces 10 is minimum, the reach under spring assembly 9 effects of the second spool 8, and spout 2 recovers sealed condition.Now can effectively prevent that in plastic cement passage, plastic cement liquid can not leaked and be overflowed by spout, so that plastic rubber shaping in injection molding cavity.
Adopt the present invention's zero pressure-holding anti-leakage plastic nozzle, owing to being provided with the first spool 4 in plastic cement passage 3, when injection moulding is sprayed, plastic cement liquid can spray into forward injection molding cavity, in the time spraying end, the first spool 4, immediately by plastic cement passage plugging, cannot reflux to injection machine the high pressure plastic cement liquid in injection molding cavity, thereby has ensured the Forming Quality of moulding, also make the injection machine must pressurize after injection completes, greatly save energy resource consumption, and simplified injection molding machine structure, improved its reliability.In plastic cement passage 3, be provided with the second spool 8, the second spools 8 under the effect of spring assembly 9, the state in shutoff spout 2 under normal conditions, in plastic cement liquid course of injection, plastic cement pressure is pushed the second spool 8 open, and spout 2, just in open mode, sprays.In plastic jet nozzle of the present invention, the first spool 4 and the second spool 8 is simple in structure, and reliable operation, is a kind of solution of high efficient and reliable.
Embodiment bis-
As shown in Figure 9 and Figure 10, be another embodiment provided by the invention, embodiment bis-is with the difference of embodiment mono-, on the second side 6 of the first spool 4, is smooth flat, and fluting is not set.On the second side 6 binding faces of shower nozzle 27 and the first spool 4, be provided with shower nozzle fluting 29, as shown in Figure 9.In injection moulding process, plastic cement liquid flows out and enters in spout 2 from shower nozzle fluting 29.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection scope of the present invention.
Claims (5)
1. zero pressure-holding anti-leakage plastic nozzle, comprises the outer body of nozzle, is arranged on the spout of the outer body front end of described nozzle, and outside described nozzle, body inside is provided with plastic cement passage vertically, it is characterized in that,
In described plastic cement passage, be provided with the first spool for stoping plastic cement liquid to reflux, described plastic cement passage has the intracavity space corresponding with the shape of described the first spool in the first spool place section; Described the first spool is the pan that middle part connects vertically, the second side that described the first spool comprises the first side of setting gradually vertically, is oppositely arranged with described the first side; Described the second side place is provided with the fluting circulating forward for plastic cement liquid, or is provided with fluting on the contact-making surface that outside described nozzle, body coordinates with described the first spool; Described zero pressure-holding anti-leakage plastic nozzle also comprises valve core housing, and described valve core housing comprises valve core housing first inwall suitable with described the first side, and described valve core housing the first inwall and described the first side fit to realize plastic cement liquid backflow cut-off completely;
In described plastic cement passage, be provided with the second spool for preventing that plastic cement liquid from leaking; Described the second spool runs through by described the first spool middle part, and front end is spout described in conical surface shape shutoff, and rear end is provided with spring assembly;
In described plastic cement passage, be provided with plastic cement and turn to supporting tight part, described plastic cement turns on supporting tight part and is provided with and turns to passage;
Described the first spool and the second spool are positioned at the front end of described plastic cement passage, are also provided with plastic cement liquid filter in the rear end of described plastic cement passage, and described plastic cement liquid filter front end is hemispherical.
2. zero pressure-holding anti-leakage plastic nozzle according to claim 1, is characterized in that, the cone angle of described the second spool front-end-cone face is below 35 degree.
3. zero pressure-holding anti-leakage plastic nozzle according to claim 1, is characterized in that, described spring assembly comprises vertically the spring that arranges, is arranged on the forestock locating part of described spring at front end and is arranged on the butt locating part of described spring rear end; Described the second spool rear end connects described forestock locating part and contacts with described forestock locating part laminating.
4. zero pressure-holding anti-leakage plastic nozzle according to claim 1, is characterized in that, described the first side and the second side are the taper surface that angle between nozzle-axis is less than 90 degree.
5. zero pressure-holding anti-leakage plastic nozzle according to claim 1, is characterized in that, described plastic cement turns to supporting tight part between described plastic cement liquid filter and described the first spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010559352.2A CN102476426B (en) | 2010-11-25 | 2010-11-25 | Zero-pressure-holding anti-leakage plastic nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010559352.2A CN102476426B (en) | 2010-11-25 | 2010-11-25 | Zero-pressure-holding anti-leakage plastic nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102476426A CN102476426A (en) | 2012-05-30 |
| CN102476426B true CN102476426B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010559352.2A Expired - Fee Related CN102476426B (en) | 2010-11-25 | 2010-11-25 | Zero-pressure-holding anti-leakage plastic nozzle |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660146B (en) * | 2013-12-04 | 2015-12-30 | 宁波千普机械制造有限公司 | Hydraulic pressure nozzle |
| CN104552833A (en) * | 2014-12-31 | 2015-04-29 | 苏州市博奥塑胶电子有限公司 | Injection molding mechanism of injection molding machine |
| CN104552834B (en) * | 2015-01-16 | 2017-05-17 | 苏州宝氏自动化科技有限公司 | Screw type low pressure injection molding machine and injection molding method thereof |
| CN109228148B (en) * | 2018-10-22 | 2021-05-18 | 宁波威瑞精密机械有限公司 | Quick-closure liquid pneumatic nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012839A (en) * | 1990-03-01 | 1991-05-07 | The Hanson Group Ltd. | Heated plastic flow control valve |
| CN1067607A (en) * | 1991-06-08 | 1993-01-06 | 谢桂深 | Combined automatic injection nozzle with anti-reflux and anti-leak junction |
| CN1651213A (en) * | 2004-02-05 | 2005-08-10 | 日本韮沙株式会社 | Valve nozzle |
| CN1788976A (en) * | 2004-12-15 | 2006-06-21 | 日本韮沙株式会社 | Valve nozzle |
-
2010
- 2010-11-25 CN CN201010559352.2A patent/CN102476426B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012839A (en) * | 1990-03-01 | 1991-05-07 | The Hanson Group Ltd. | Heated plastic flow control valve |
| CN1067607A (en) * | 1991-06-08 | 1993-01-06 | 谢桂深 | Combined automatic injection nozzle with anti-reflux and anti-leak junction |
| CN1651213A (en) * | 2004-02-05 | 2005-08-10 | 日本韮沙株式会社 | Valve nozzle |
| CN1788976A (en) * | 2004-12-15 | 2006-06-21 | 日本韮沙株式会社 | Valve nozzle |
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|---|---|
| CN102476426A (en) | 2012-05-30 |
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Granted publication date: 20140917 Termination date: 20161125 |