CN101225891A - Nylon ball valve and manufacturing method thereof - Google Patents
Nylon ball valve and manufacturing method thereof Download PDFInfo
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- CN101225891A CN101225891A CNA2008100595134A CN200810059513A CN101225891A CN 101225891 A CN101225891 A CN 101225891A CN A2008100595134 A CNA2008100595134 A CN A2008100595134A CN 200810059513 A CN200810059513 A CN 200810059513A CN 101225891 A CN101225891 A CN 101225891A
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Abstract
The invention provides a nylon ball valve and the preparation method, which aims to solve the multiple problems in prior nylon ball valve structure, such as complex structure, poor stability of use, the difficulty in fulfilling the prior preparation method, and complicated processes. The nylon ball valve comprises a valve body, a valve core, a valve stem, and a handle; wherein, the valve body is made of nylon material, and a water inlet channel and a water outlet channel are arranged on the valve body; the valve core is arranged in the valve body; one end of the valve stem is fixedly connected with the valve core, and the other end extends outside the valve body and is fixedly connected with the handle. The valve core takes the shape of a cylinder, and two perforated through holes 1 are arranged on the side wall of the valve core, and are able to correspond to the water inlet channel and the water outlet channel respectively; moreover, when the valve core rotates, the water inlet channel, the through holes 1, and the water outlet channel can be communicated. The preparation method of the nylon ball valve comprises the following steps: A, manufacturing the valve core; B, fixing and closing a mould; C, injecting; D, humidifying treatment; E, assembling. The nylon ball valve has the advantages of simple structure, low costs, good stability in use, and convenience for implementing the preparation method, and simple processes.
Description
Technical field
The present invention relates to a kind of ball valve and preparation method thereof, relate in particular to a kind of nylon ball valve and preparation method thereof.
Background technique
Liu Tong ball valve adopts copper product to make mostly in the market, and because copper valency rise in the world makes the cost of making ball valve also sharp rise, in order to reduce production costs, a large amount of lead has infiltrated in many producers when the production of copper ball valve.Because ball valve is applied on the tap water mostly, plumbous a large amount of infiltrations make ball valve can cause severe contamination to tap water in permanent the use.
For this reason, someone has improved above-mentioned deficiency, " nylon ball valve and the manufacture method thereof " that provides as Chinese patent CN1884882 is exactly an example wherein, its nylon ball valve is made up of valve body, spool, valve rod, bonnet, handle, seal ring, O type circle, valve body is made with nylon, and copper bush is arranged in the valve body.Its manufacture method: at first valve ball, seal ring and sheath are fitted together, again O shape circle is contained in the outside of valve rod, and valve rod is contained between valve ball and the sheath; Secondly endosome is contained on the mandrel, loads onto setting sleeve, in the setting sleeve copper bush can be housed, fix with nut again, and the setting sleeve that will float is enclosed within the outside of valve rod in the both sides of endosome; At last it is contained in the mould, injects nylon material.Though this structure has adopted nylon material to make valve body, spool and valve rod all are to cast back reprocessing respectively, make complex process and have increased cost of production, also make product structure complicated simultaneously.The sealing of this ball valve is that the method that adopts ordinary ball valve to close two layers of isolation realizes that sealing effect is not fine like this, owing to adopted O type circle to realize its sealing, has increased its cost of production simultaneously.On aspect the manufacturing process, because spool is spherical, and O type circle is arranged between spool, valve rod and the valve body, so the outside at spool, valve rod has added sheath, increased difficulty of processing and cost of production, and injected the nylon process, its temperature is very high, thereby can make sheath distortion even damage to a certain extent, thereby can make nylon be penetrated into sheath inside, will make the product of producing defective like this.
Summary of the invention
The objective of the invention is at existing in prior technology the problems referred to above, a kind of simple in structure, cost is lower, stability in use is high nylon ball valve is provided.
Second purpose of the present invention is: the making method that a kind of above-mentioned nylon ball valve is provided.
First purpose of the present invention can realize by following technical proposal: a kind of nylon ball valve, comprise valve body, spool, valve rod and handle, valve body is made by nylon material, have intake tunnel and exhalant canal on the valve body, above-mentioned spool is located in the valve body, valve rod one end and spool are connected, the other end stretches out valve body and handle is connected, it is characterized in that, described spool is cylindric, the spool sidewall is provided with one, two through hole one of two through holes that run through can be corresponding with above-mentioned intake tunnel and exhalant canal respectively, and can make intake tunnel when valve core rotation, through hole one and exhalant canal communicate.
In this nylon ball valve, because the valve body that nylon material is made has self lubricity, wear resistance, therefore, spool, the valve rod outside have just directly formed sealing with the interior side contacts of valve body, need between spool, valve rod and valve body seal ring be set.Rotational valve core can make two through holes one on the spool communicate with intake tunnel and exhalant canal respectively, that is to say that rotational valve core can make this nylon ball valve open, and the corresponding spool that rotates also can make this nylon ball valve close.
In above-mentioned nylon ball valve, also has the convex body that is connected as a single entity with valve body in the described spool, described convex body closely contacts with the spool inwall, has the through hole two that runs through on the convex body, communicates when valve core rotation can make intake tunnel, through hole one, through hole two and exhalant canal.Because convex body also is a nylon material, such structure just makes and directly forms sealing between spool inboard and the convex body.Certainly, need rotational valve core just can make intake tunnel, through hole one, through hole two and exhalant canal, even this nylon ball valve is opened.
In above-mentioned nylon ball valve, described valve rod and spool are connected as a single entity, and spool and valve rod are made by metallic material.Such structure can adopt punching press once to make moulding.
In above-mentioned nylon ball valve, described through hole one is that the center is symmetrical arranged with the spool middle part.Such structure makes this nylon ball valve that passes through that flowing medium can be straight.
A kind of making method of nylon ball valve is characterized in that, this making method may further comprise the steps:
A, making spool: the metallic material of bulk is made as spool blank cylindraceous by punching press with it, on the two side of spool, gets out a through hole that runs through respectively by rig then;
B, dress mould, matched moulds: a positioning shaft is through at two through hole one places, positioning shaft and valve core through hole one size are complementary, and then putting the thread bush that its outside has screw thread respectively at place, the two ends of positioning shaft, thread bush is in the both sides of spool, is assembled into the core rod assembly; Mould is made up of die body one and die body two, and above-mentioned core rod assembly is placed between die body one and the die body two, then die body one and die body two is bonded together;
C, injection: the nylon material of fusion is injected in the mould, treat that nylon material 3 seconds-3 minutes solidifies after, take die body one and die body two, thread bush, positioning shaft successively apart, promptly obtain the nylon ball valve blank;
D, damping are handled: above-mentioned ball valve blank is placed 20-120 ℃ damping liquid soaked through 1-16 hour;
E, assembling: make handle in advance, handle is connected the spool outer end.
After spool is made, positioning shaft is through the through hole of spool, and then puts a thread bush respectively at the two ends of positioning shaft.Die body one and die body two are bonded together, and certainly, after two die bodys engaged, spool was in the mould.Be injected in the mould by the nylon material of injection machine, treat to take apart successively after nylon material solidifies the blank that die body one, die body two, thread bush, positioning instant obtain nylon ball valve fusion.
Injection molded nylon ball valve blank is owing to itself material, and its water absorption rate is bigger, can reduce the valve body suction to Effect on Performance after handling by damping, improves dimensional stability.
Produce handle by common technology, handle being connected the whole nylon ball valve in spool outer end again is moulding.
In the making method of above-mentioned nylon ball valve, also made valve rod by punching press in the described steps A, valve rod and spool are connected as a single entity.Such structure makes has simplified operation, has improved manufacturing efficient accordingly, and the also corresponding reduction of cost.
In the making method of above-mentioned nylon ball valve, outside spool inboard and the outside and valve rod, plate one deck chromium by electroplating processes after the described steps A.Electroplating processes is common technology, after plating chromium on the sidewall of spool, can prevent that spool is corroded or corrosion.Simultaneously, make that also spool, the valve rod outside is smooth smooth, can reduce friction, improve sealing.
In the making method of above-mentioned nylon ball valve, be with a spool setting sleeve among the described step B in the outer end of valve rod, and above-mentioned die body one and die body two engage the back all have on both can with the recess of setting sleeve clamping.Obviously, die body once and die body two engage the back and setting sleeve can be fixed by recess, it can't be moved, certain, spool also just has been positioned, and makes spool to move axially along positioning shaft.
In the making method of above-mentioned nylon ball valve, all has interface arrangment between the die body one among the described step B and die body two and the thread bush.After die body one is bonded together with die body two, die body one and die body two are linked together firmly, but also thread bush is in the mould and can't be shifted or deviates from by this interface arrangment.
In the making method of above-mentioned nylon ball valve, described interface arrangment is the draw-in groove that is complementary with shoulder block on the shoulder block that protrudes of the thread bush outside and die body one or the die body two.Shoulder block and draw-in groove mutually after the clamping die body once with die body two can be firm link together.
In the making method of above-mentioned nylon ball valve, the trade mark of the nylon material among the described step C is pa6 or pa66.Such material makes that the valve body mechanical strength is higher, and heat-resisting ability is strong.
In the making method of above-mentioned nylon ball valve, damping liquid is the potassium acetate aqueous solution among the described step D, and the weight ratio of water and potassium acetate is 1: 0.6-1.25.Adopt the solution of this ratio to make it possible to effectively lower the nylon material moisture absorption, the dimensional stability that improves nylon material toughness and improve nylon material.
Compared with prior art, this nylon ball valve only is made up of valve body, spool and handle, therefore, it simple in structure, cost is lower.
The making method of this nylon ball valve only need be made spool earlier, and injection moulding in mould gets final product with positioning shaft and thread set again.Obviously, this making method is easy to implement, technology is easy.Simultaneously the nylon ball valve made of this making method has the characteristics of higher mechanical strength, heat-resisting, wear-resistant, shock absorption, noise reduction, nontoxic, odorless.
Description of drawings
Fig. 1 is the sectional structure schematic representation of this nylon ball valve.
Fig. 2 is the broken section structural representation of this nylon ball valve.
Fig. 3 is the perspective view of spool in this nylon ball valve.
Fig. 4 is the structural representation behind the dress mould in this nylon ball valve making method.
Among the figure, 1, valve body; 11, convex body; 12, through hole two; 2, spool; 21, through hole one; 3, valve rod; 4, handle 5, positioning shaft; 6, thread bush; 61, shoulder block; 7, spool setting sleeve.
Embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one
As shown in Figure 1, this nylon ball valve comprises valve body 1, spool 2, valve rod 3 and handle 4.Valve body 1 is to be made by the nylon material of modification, and it is to add to add 15% glass fibre by weight in nylon material, and in the present embodiment, the trade mark of nylon material is pa66.Spool 2 is cylindric and it is located in the valve body 1, and the inner of valve rod 3 and spool 2 are connected as a single entity, and the outer end of valve rod 3 passes valve body 1 and is connected with handle 4, sees shown in Figure 3.
Have an intake tunnel and an exhalant canal on the valve body 1, the sidewall of spool 2 is provided with two through holes that run through 1, and in the present embodiment, two through holes 1 are that the center is symmetrical arranged with spool 2 middle parts.And two through holes 1 on the spool 2 can pass through with water inlet respectively and exhalant canal is corresponding.
Also have the convex body 11 that is connected as a single entity with it in this valve body 1, convex body 11 is resisted against spool 2 inboards.See shown in Figure 2ly, also be provided with the through hole 2 12 that runs through on convex body 11, the two ends of through hole 2 12 are corresponding with intake tunnel and exhalant canal respectively.Certainly, two through holes 1 that rotate on the back valve core 2 when spool 2 can communicate with intake tunnel.
Because valve body 1 and convex body 11 are all made by nylon material, therefore, just can directly form sealing between spool 2 outsides and valve body 1 and spool 2 inboards and the convex body 11.
On the contrary, in the time of nylon ball valve need being closed, rotational valve core 2 does not communicate intake tunnel, through hole 1, through hole 2 12 and exhalant canal and gets final product.
The making method of this nylon ball valve may further comprise the steps:
A, making spool: the metallic material of bulk is made as spool 2 blanks cylindraceous by punching press with it, and by the outside and the interior sidecar circle of machining with spool 2, with valve rod 3 outer sidecars circles, this is machined as common Vehicle Processing then; On the two side of spool 2, get out a through hole that runs through 1 respectively by drilling machine then.In the present embodiment, also stamped out valve rod 3 in the lump in stamping process, that is to say that valve rod 3 and spool 2 are connected as a single entity, processed screw thread by the outer end that is machined into valve rod 3, the screw thread by valve rod 3 outer ends can be connected with handle 4.
Just make moulding through said process back valve core 2, plate one deck chromium by common electroplating technology at spool 2 and valve rod 3 sidepieces again.According to actual conditions, also can plate one deck nickel.
B, dress mould, matched moulds: a positioning shaft 5 is through at two through hole one 21 places, positioning shaft 5 is complementary with spool 2 through holes one 21 sizes, and then put the thread bush 6 that its outside has screw thread respectively at place, the two ends of positioning shaft 5, thread bush 6 is in the both sides of spool 2, with valve rod 3 outer ends cover upper valve core setting sleeve 7, be assembled into the core rod assembly, see shown in Figure 4.
Mould is made up of die body one and die body two, and above-mentioned core rod assembly is placed between die body one and the die body two, then die body one and die body two is bonded together.In the present embodiment, has a linkage structure that die body one and die body two are firmly linked together between die body one and thread bush 6 and die body two and the thread bush 6, this linkage structure be located at the shoulder block 61 in the thread bush outside and establish with die body one or die body two on draw-in groove, draw-in groove and shoulder block 61 are complementary, and that is to say that shoulder block 61 can be connected in the draw-in groove.Simultaneously, all have recess on die body one and the die body two,, make spool 2 location are lived, avoid it at the die body internal shift when the be bonded together recess of latter two die body of die body one and die body two blocks spool setting sleeve 7.
C, injection: select for use nylon raw material to adopt commonsense method that it is dried, nylon raw material after will drying is then packed in the injection machine, adopt injection machine that the nylon material of fusion is injected in the mould, after treating that nylon material solidified in 30 seconds, take die body one and die body two, thread bush 6, positioning shaft 5, spool setting sleeve 7 successively apart, promptly obtain the nylon ball valve blank;
D, damping are handled: above-mentioned ball valve blank is placed 30 ℃ damping liquid soaked through 5 hours, the ball valve blank is taken out airing under the room temperature of back from damping liquid; Damping liquid is the potassium acetate aqueous solution, and the weight ratio of water and potassium acetate is 1: 0.8.
E, assembling: make handle 4 by machining in advance, handle 4 is connected valve rod 3 outer ends again, in the present embodiment, valve rod 3 outer ends and handle 4 are connected by screw thread.
Through punching press, machining and plating back valve core 2 and valve rod 3 and making moulding, positioning shaft 5 is through spool 2 through holes one 21 places, again two thread bushs 6 are enclosed within the two ends of positioning shaft 5 respectively, spool setting sleeve 7 is loaded on the valve rod outer end, the core rod assembly forming.The core rod assembly is packed in the mould, after the injection moulding and treat that nylon material solidifies, take the blank that mould, positioning shaft 5, thread bush 6, spool setting sleeve 7 promptly obtain nylon ball valve successively apart.Certainly, thread bush 6 screws out in unpack procedure, and the screw thread by thread bush 6 outsides makes the intake tunnel of valve body 1 and exhalant canal place have screw thread.
By reducing the suction of nylon ball valve valve body after the damping processing and, also can eliminating the internal stress of valve body simultaneously to its Effect on Performance.
Ready made handle 4 is connected valve rod 3 outer ends, and whole nylon ball valve is promptly made moulding.In order to make the ball valve beautiful shape clean and tidy, also can the burr and the burr in valve body 1 outside be got rid of by polishing or cutting.
Embodiment two
In the present embodiment, be 1 minute the curing time of nylon material among the step C; Damping among the step D is handled and is placed 50 ℃ damping liquid to soak through 3 hours the ball valve blank, after the taking-up again with its airing at room temperature.Damping liquid is the potassium acetate aqueous solution, and the weight ratio of water and potassium acetate is 1: 1.
Other is identical with embodiment one, does not repeat them here.
Embodiment three
In the present embodiment, be 2 minutes the curing time of nylon material among the step C; Damping among the step D is handled and is placed 100 ℃ damping liquid to soak through 10 hours the ball valve blank, after the taking-up again with its airing at room temperature.Damping liquid is the potassium acetate aqueous solution, and the weight ratio of water and potassium acetate is 1: 0.7.
Other is identical with embodiment one, does not repeat them here.
Claims (10)
1. nylon ball valve, comprise valve body (1), spool (2), valve rod (3) and handle (4), valve body (1) is made by nylon material, valve body has intake tunnel and exhalant canal on (1), above-mentioned spool (2) is located in the valve body (1), valve rod (3) one ends and spool (2) are connected, the other end stretches out valve body (1) and is connected with handle (4), it is characterized in that, described spool (2) is cylindric, spool (2) sidewall is provided with two through holes that run through (21), and two through holes one (21) can be corresponding with above-mentioned intake tunnel and exhalant canal respectively, and can make intake tunnel when spool (2) rotates, through hole one (21) and exhalant canal communicate.
2. nylon ball valve according to claim 1, it is characterized in that, also has the convex body (11) that is connected as a single entity with valve body (1) in the described spool (2), described convex body (11) closely contacts with spool (2) inwall, have the through hole two (12) that runs through on the convex body (11), intake tunnel, through hole one (21), through hole two (12) and exhalant canal are communicated when spool (2) rotates.
3. nylon ball valve according to claim 1 and 2 is characterized in that, described valve rod (3) and spool (2) are connected as a single entity, and spool (2) and valve rod (3) are made by metallic material.
4. nylon ball valve according to claim 1 and 2 is characterized in that, described through hole one (21) is that the center is symmetrical arranged with spool (2) middle part.
5. the making method of a nylon ball valve is characterized in that, this making method may further comprise the steps:
A, making spool: the metallic material of bulk is made as spool cylindraceous (2) blank by punching press with it, on the two side of spool (2), gets out a through hole that runs through (21) respectively by rig then;
B, dress mould, matched moulds: a positioning shaft (5) is through at two through holes one (21) locates, positioning shaft (5) is complementary with spool (2) through hole one (21) size, and then put the thread bush (6) that its outside has screw thread respectively at place, the two ends of positioning shaft (5), thread bush (6) is in the both sides of spool (2), is assembled into the core rod assembly; Mould is made up of die body one and die body two, and above-mentioned core rod assembly is placed between die body one and the die body two, then die body one and die body two is bonded together;
C, injection: the nylon material of fusion is injected in the mould, treat that nylon material 3 seconds-3 minutes solidifies after, take die body one and die body two, thread bush (6), positioning shaft (5) successively apart, promptly obtain the nylon ball valve blank;
D, damping are handled: above-mentioned ball valve blank is placed 20-120 ℃ damping liquid soaked through 1-16 hour;
E, assembling: make handle (4) in advance, handle (4) is connected spool (2) outer end.
6. the making method of nylon ball valve according to claim 5, it is characterized in that, also made valve rod (3) by punching press in the described steps A, valve rod (3) is connected as a single entity with spool (2), plates one deck chromium by electroplating processes outside spool (2) inboard and the outside and valve rod (3) after the described steps A.
7. the making method of nylon ball valve according to claim 5, it is characterized in that, be with a spool (2) setting sleeve among the described step B in the outer end of valve rod (3), and above-mentioned die body one and die body two engage the back all have on both can with the recess of setting sleeve clamping.
8. the making method of nylon ball valve according to claim 5, it is characterized in that, all have interface arrangment between die body one among the described step B and die body two and the thread bush (6), described interface arrangment is the draw-in groove that is complementary with shoulder block (61) on the shoulder block (61) that protrudes of thread bush (6) outside and die body one or the die body two.
9. according to the making method of claim 5 or 6 or 7 or 8 described nylon ball valves, it is characterized in that the trade mark of the nylon material among the described step C is pa6 or pa66.
10. according to the making method of claim 5 or 6 or 7 or 8 described nylon ball valves, it is characterized in that damping liquid is the potassium acetate aqueous solution among the described step D, the weight ratio of water and potassium acetate is 1: 0.6-1.25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100595134A CN101225891A (en) | 2008-01-25 | 2008-01-25 | Nylon ball valve and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100595134A CN101225891A (en) | 2008-01-25 | 2008-01-25 | Nylon ball valve and manufacturing method thereof |
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| CN101225891A true CN101225891A (en) | 2008-07-23 |
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| CNA2008100595134A Pending CN101225891A (en) | 2008-01-25 | 2008-01-25 | Nylon ball valve and manufacturing method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011060577A1 (en) * | 2009-11-17 | 2011-05-26 | He Jianchu | Manufacturing method of nylon ball valve |
| CN102416683A (en) * | 2010-09-28 | 2012-04-18 | 张爱平 | Production method of MC (monomer casting) nylon valve |
| CN102615292A (en) * | 2012-04-10 | 2012-08-01 | 永高股份有限公司 | Machining method for ball core of water feeding ball valve |
| CN103722685A (en) * | 2013-05-27 | 2014-04-16 | 昆山德安模具设计有限公司 | Intelligent multi-functional injection molding machine |
| CN105437450A (en) * | 2015-12-17 | 2016-03-30 | 广东金邦体育设施有限公司 | Forming method of plastic rubber product |
| CN109297181A (en) * | 2018-11-12 | 2019-02-01 | 盐城市旺科电子技术有限公司 | Immediately heating water heater |
| CN109290939A (en) * | 2018-11-27 | 2019-02-01 | 嘉兴南艺管业有限公司 | A kind of processing technology of water supply ball valve ball core |
| CN109780242A (en) * | 2019-01-09 | 2019-05-21 | 何建初 | A kind of gate valve and its manufacturing method |
| CN110172171A (en) * | 2019-05-06 | 2019-08-27 | 东风汽车集团有限公司 | A kind of method of polyamide material damping balance |
| CN112936918A (en) * | 2021-01-26 | 2021-06-11 | 中车青岛四方车辆研究所有限公司 | Nylon lining post-treatment process |
| CN114131837A (en) * | 2021-11-26 | 2022-03-04 | 南京航空航天大学 | Method for preparing complex soft structure by using water-soluble template |
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2008
- 2008-01-25 CN CNA2008100595134A patent/CN101225891A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011060577A1 (en) * | 2009-11-17 | 2011-05-26 | He Jianchu | Manufacturing method of nylon ball valve |
| CN102416683A (en) * | 2010-09-28 | 2012-04-18 | 张爱平 | Production method of MC (monomer casting) nylon valve |
| CN102416683B (en) * | 2010-09-28 | 2014-08-27 | 张爱平 | Production method of MC (monomer casting) nylon valve |
| CN102615292A (en) * | 2012-04-10 | 2012-08-01 | 永高股份有限公司 | Machining method for ball core of water feeding ball valve |
| CN102615292B (en) * | 2012-04-10 | 2013-10-23 | 永高股份有限公司 | Machining method for ball core of water feeding ball valve |
| CN103722685A (en) * | 2013-05-27 | 2014-04-16 | 昆山德安模具设计有限公司 | Intelligent multi-functional injection molding machine |
| CN105437450A (en) * | 2015-12-17 | 2016-03-30 | 广东金邦体育设施有限公司 | Forming method of plastic rubber product |
| CN109297181A (en) * | 2018-11-12 | 2019-02-01 | 盐城市旺科电子技术有限公司 | Immediately heating water heater |
| CN109290939A (en) * | 2018-11-27 | 2019-02-01 | 嘉兴南艺管业有限公司 | A kind of processing technology of water supply ball valve ball core |
| CN109780242A (en) * | 2019-01-09 | 2019-05-21 | 何建初 | A kind of gate valve and its manufacturing method |
| CN110172171A (en) * | 2019-05-06 | 2019-08-27 | 东风汽车集团有限公司 | A kind of method of polyamide material damping balance |
| CN110172171B (en) * | 2019-05-06 | 2021-09-10 | 东风汽车集团有限公司 | Method for humidifying and balancing polyamide material |
| CN112936918A (en) * | 2021-01-26 | 2021-06-11 | 中车青岛四方车辆研究所有限公司 | Nylon lining post-treatment process |
| CN114131837A (en) * | 2021-11-26 | 2022-03-04 | 南京航空航天大学 | Method for preparing complex soft structure by using water-soluble template |
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Open date: 20080723 |