CN102198732A - Method for preparing pipe core and hetero-type rubber tube - Google Patents
Method for preparing pipe core and hetero-type rubber tube Download PDFInfo
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- CN102198732A CN102198732A CN2010101330231A CN201010133023A CN102198732A CN 102198732 A CN102198732 A CN 102198732A CN 2010101330231 A CN2010101330231 A CN 2010101330231A CN 201010133023 A CN201010133023 A CN 201010133023A CN 102198732 A CN102198732 A CN 102198732A
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- tube core
- expansion
- pipe
- leading portion
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Abstract
The invention provides a method for preparing a pipe core and a hetero-type rubber tube. The pipe core comprises a straight forepart, a straight rear part and a bend; the forepart, blend and rear part are connected in order, and the thermal expansion coefficient of the forepart is larger than that of the rear part. The hetero-type rubber tube prepared by the method in the invention has a small pipe diameter deviation, and product quality is improved.
Description
Technical field
The present invention relates to a kind of tube core and special hose preparation method, especially opposite sex pipe tube core reaches the method by this die preparation special hose.
Background technology
In the daily life, the use of rubber tube, especially automobile usefulness rubber tube more and more widely.Usually, the preparation method of rubber tube generally is divided into compression molding and extrudes back punching sulfidization molding dual mode.
The method of compression molding is meant puts into the mould compression molding with sizing material, puts into vulcanizing press then through sulfidization molding.This method need process the molding die that meets shape of product and angle earlier usually, and this mould is made up of the support tube core two parts in the middle of bolster and the sebific duct.The smooth surface of the rubber tube of this method preparation, but in manufacturing process, generally adopt high pressure, high temperature, short time sulfuration.And under the condition of high pressure, support tube core easy off normal in product sulfidization molding process, thus cause the rubber tube product obviously eccentric, cause the product yield extremely low.
Extrude the method for back punching sulfidization molding, be meant the sebific duct pipe of extruding hollow at first continuously, pipe penetrates above the tube core of definite shape then, puts into steam vulcanization (cure) jar sulfidization molding.This method is mass production method not, relative molded vulcanization mode, and production efficiency improves and has reduced cost greatly.But for special hose, because pipe has bent angle, cause vulcanizing the bigger than normal of the whole internal diameter size of back bent angle back segment, cause the whole internal diameter size of shape tube, especially two-port internal diameter deviation is bigger, greatly reduces the quality of shape tube product.
Summary of the invention
The present invention is in order to overcome in the prior art when extruding back punching sulfidization molding and prepare shape tube, the bigger problem of the whole internal diameter size deviation of shape tube, a kind of pipe is provided, and the whole internal diameter size deviation of shape tube for preparing by this pipe is little, has improved the quality of shape tube product greatly.
Tube core disclosed by the invention comprises straight leading portion and back segment, and bent angle; Described leading portion, bent angle and back segment are connected successively, and the thermal coefficient of expansion of described leading portion is greater than the thermal coefficient of expansion of back segment.
In addition, the invention also discloses the method that adopts above-mentioned die preparation special hose, comprising:
A, sizing material is extruded, obtained the hollow pipe that inside has tube chamber;
B, tube core is inserted in the tube chamber of pipe, obtain pipe to be vulcanized; Wherein said tube core is above-mentioned tube core, makes the tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain the special hose precursor;
D, tube core is deviate from, obtained special hose.
In the preparation process of special hose, after sizing material extruded, the pipe uncured that obtains, the dimensional stability deficiency makes it in the problem that occurs change in size through the product that obtains after the follow-up sulfuration easily.Especially shape tube has bent angle, makes its this problem more outstanding.And in method disclosed by the invention, by specific adjusted and selection to tube core, and in the control of preparation method during special hose, make tube core in sulfidation, zones of different produces expansion in various degree, size to pipe is exerted one's influence, and greatly reduces the difference of special hose product internal diameter, has improved product quality.
The specific embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Tube core disclosed by the invention comprises straight leading portion and back segment, and bent angle; Described leading portion, bent angle and back segment are connected successively, and the thermal coefficient of expansion of described leading portion is greater than the thermal coefficient of expansion of back segment.
In the art, tube core is corresponding with the shape of the special hose that will prepare.Tube core by said structure can solve other problem of special hose product difference in internal diameters preferably.Simultaneously, the inventor finds that the angle of bent angle on the special hose that will prepare (being the bent angle of tube core accordingly) is more little, and its internal diameter difference is big more.Eliminate other effect of special hose difference in internal diameters for better embodying, under the preferable case, described bent angle angle is not more than 100 °, more preferably 55-85 °.Promptly when having the special hose of above-mentioned scope inside corners, preparation adopts tube core more remarkable effect with feature disclosed by the invention.
According to the present invention, the thermal coefficient of expansion of described leading portion is than big (1-3) * 10 of thermal coefficient of expansion of back segment
-5℃
-1, under the preferable case, the thermal coefficient of expansion of leading portion is than big (2-3) * 10 of thermal coefficient of expansion of back segment
-5℃
-1For the preparation different materials special hose the time, the thermal coefficient of expansion of tube core leading portion and back segment can be regulated according to actual use, makes special hose internal diameter difference reduce to get final product.
Independent, for the leading portion of described tube core, under the preferable case, its thermal coefficient of expansion is (1.2-3.2) * 10
-5℃
-1, (2.1-3.1) * 10 more preferably
-5℃
-1For the back segment of described tube core, under the preferable case, its thermal coefficient of expansion is (1-20) * 10
-7℃
-1, (1-10) * 10 more preferably
-7℃
-1
Wherein,, can be selected from a kind of in copper, iron, the aluminium, be preferably a kind of in aluminium, the copper for the material of tube core leading portion; Relative, for the material of tube core back segment, can be selected from a kind of in invar, quartz, tin, the oxygen-free copper, be preferably a kind of in invar, tin, the quartz.
Above-mentioned tube core with unlike material can be by combining different materials by the mode of welding or be threaded.That is, adopt different material preparation leading portion, bent angle and back segment, then front end, bent angle and back segment are combined by the mode of welding or be threaded, form tube core.The selection of described bent angle can be identical with leading portion or back segment, also can adopt the material of thermal coefficient of expansion between leading portion and rear end.
Usually, on the special hose of required preparation bent angle quantity have a plurality of, so in above-mentioned disclosed tube core, bent angle can or have 2 for 1 accordingly, as being 2-4.Connect by changeover portion between the described bent angle; On the tube core, the thermal coefficient of expansion of leading portion, changeover portion, back segment successively decreases successively.At this moment, above-mentioned changeover portion may be 1 or a plurality of.According to the actual fabrication needs, described changeover portion can have more than 2, as 2-4; When above-mentioned changeover portion when being a plurality of, under the preferable case, along tube core, on the direction from the leading portion to the back segment, the thermal coefficient of expansion of the above-mentioned a plurality of changeover portions trend that tapers off.
Under the preferable case, the material of above-mentioned changeover portion does not require, and the requirement that only need satisfy above-mentioned thermal coefficient of expansion gets final product, for example can be in high-speed steel, carbon steel, the spring steel a kind of.Equally, these a plurality of changeover portions directly can combine by welding or the mode that is threaded with bent angle.
More preferably under the situation, when described changeover portion has only one, along tube core, on the direction from the leading portion to the back segment, the trend that also tapers off of the thermal coefficient of expansion on this changeover portion.This moment can be by combining 2 kinds of materials at least by the mode of welding or be threaded.
In the present invention, not too big requirement of the material that bent angle adopted under the preferable case, can be adopted identical material in connected leading portion, back segment or the changeover portion.
The invention also discloses a kind of preparation method of special hose, comprising:
A, sizing material is extruded, obtained the hollow pipe that inside has tube chamber;
B, tube core is inserted in the tube chamber of pipe, obtain pipe to be vulcanized; Wherein said tube core is above-mentioned tube core, makes the tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain the special hose precursor;
D, tube core is deviate from, obtained special hose.
According to the present invention, the used sizing material of preparation special hose can be this area various sizing materials commonly used, and sizing material can contain 100 parts of ethylene propylene diene rubbers, 5.0 parts of zinc oxide, 1.5 parts of stearic acid, 80 portions of reinforcing agents, 40 parts of fillers, 2.0 parts of age resistor, 50 parts of softening agents, 0.5 part of sulphur, 4.5 parts of promoter, 2.0 parts of processing aids as described.
By when preparing sizing material, can carry out banburying and open refining sizing material, make that each composition further mixes in the sizing material, and promote the generation of some reactions, improve the performance of last special hose product.
Wherein, described banburying method is this area method commonly used, as the banburying condition is: the various components of sizing compound formula are joined in the banbury (iceberg, Dalian rubber and plastics machine Co., Ltd) persistently overheating mixing 4-5min; When reaching 120 ℃, temperature opens floating weight of banbury mixer, exhaust 1-3 time.Close floating weight then, continue to be warming up to discharge behind 130 ℃ of mixing 2-3min, obtain elastomeric compound.
The described smelting method of opening is this area method commonly used, as opens the refining condition and be: elastomeric compound is placed in the mill (iceberg, Dalian rubber and plastics machine Co., Ltd), be warming up to 50-80 ℃, open refining time 15-25min.
Among the preparation method of special hose disclosed by the invention, the method for extruding is this area method commonly used, extrudes machine as the combined type that the above-mentioned sizing material of getting ready is placed Zhanjiang equipment Co., Ltd produce, and extrudes under 75 ℃, and extruded velocity is 8m/min.In the present invention, the internal diameter of extruding the pipe that obtains by above-mentioned extruder is thought consistent with external diameter.
After extruder is extruded continuously, promptly obtain the special hose pipe, can according to actual needs it be cut into the pipe of certain-length.
After obtaining pipe, above-mentioned tube core can be inserted in the tube chamber of pipe, obtain pipe to be vulcanized; Wherein, make the tube core leading portion be introduced into tube chamber during insertion.The method of above-mentioned insertion tube core repeats no more once more for the method that those skilled in the art use always.
After in pipe, inserting tube core, can vulcanize.
The method of described sulfuration can adopt existing the whole bag of tricks to carry out, as: can adopt: pipe to be vulcanized is placed the steam vulcanization (cure) jar, in 140-165 ℃, 0.2-0.8MPa sulfuration 20-60min down, be preferably under 145-155 ℃, 0.4-0.55MPa and vulcanize 25-35min.After vulcanizing by this method, can obtain the special hose precursor.
In this area, when adopting said method to vulcanize, because pipe directly is exposed in the steam, in sulfidation, water can be condensed in the pipe surface, makes the product surface that obtains at last " washmarking " occur.In order to improve the apparent property of special hose product, under the preferable case, can earlier pipe to be vulcanized be placed mould, mould is positioned in the steam vulcanization (cure) jar vulcanizes then, conditions of vulcanization is identical with aforementioned condition, obtains the special hose precursor.After the sulfuration, the special hose precursor is taken out from mould.
In above-mentioned vulcanization process, mould can adopt existing various mould, as the molding die of routine, only needs to wait to vulcanize the pipe outer wall and surrounds, and exist and wait to vulcanize the pipe corresponding grooves and make and wait to vulcanize the shape of pipe in sulfidation and keep stablizing.
Obtain to carry out depoling behind the special hose precursor.The method of depoling can be for well known to a person skilled in the art method, as can directly manually tube core being taken out from different in nature sebific duct precursor.In order to enhance productivity, also can adopt the method for pneumatic depoling to carry out.Be about to a depoling pipe that is connected to high-pressure air source and insert between special hose precursor and the tube core, feed gases at high pressure then, the special hose precursor is separated with tube core, promptly take out tube core then wink and get final product.
Because the special hose precursor has passed through vulcanizing treatment, has good resilience.Processing in the depoling process can not produce substantial effect to the size of special hose product.
The present invention is further illustrated below by embodiment.
The sizing compound formula that adopts in the embodiment of the invention and Comparative Examples is: 100 parts of ethylene propylene diene rubbers, 5.0 parts of zinc oxide, 1.5 parts of stearic acid, 80 portions of reinforcing agents, 40 parts of fillers, 2.0 parts of age resistor, 50 parts of softening agents, 0.5 part of sulphur, 4.5 parts of promoter, 2.0 parts of processing aids.
The various components of above-mentioned sizing compound formula are joined in the banbury (iceberg, Dalian rubber and plastics machine Co., Ltd) persistently overheating mixing 5min; When reaching 120 ℃, temperature opens floating weight of banbury mixer, exhaust 3 times.Close floating weight then, continue to be warming up to discharge behind 130 ℃ of mixing 3min, obtain elastomeric compound.
Elastomeric compound is placed in the mill (iceberg, Dalian rubber and plastics machine Co., Ltd), be warming up to 80 ℃, open refining 20min.It is standby to obtain sizing material.
Embodiment 1
Present embodiment is used to illustrate the preparation method of tube core disclosed by the invention and special hose.
The combined type that sizing material places Zhanjiang equipment Co., Ltd to produce is extruded machine, extrude under 75 ℃, extruded velocity is 8m/min.Obtain pipe A1 after cutting, this pipe has 1 80 ° bent angle.
Get and the corresponding tube core of pipe configuration, it has 1 80 ° bent angle.This tube core is that (thermal coefficient of expansion is 2.3 * 10 to aluminium
-5℃
-1) (thermal coefficient of expansion is 1.86 * 10 with oxygen-free copper
-7℃
-1) be formed by connecting in the corner by screw thread.
With this tube core pipe is carried out punching and handle, obtain pipe to be vulcanized.An end that during punching with the material is aluminium is a leading portion, penetrates earlier in the tube chamber of pipe.
Pipe to be vulcanized is placed the steam vulcanization (cure) jar, in 150 ℃, the following sulfuration of 0.4MPa 30min.Obtain the special hose precursor.
The special hose precursor is taken out, adopt manual depoling method that tube core is taken out, obtain special hose S1.
Embodiment 2
Present embodiment is used to illustrate the preparation method of tube core disclosed by the invention and special hose.
The preparation method of special hose is identical with embodiment 1, and different is that (thermal coefficient of expansion is 1.2 * 10 to employing iron
-5℃
-1) (thermal coefficient of expansion is 5.5 * 10 with quartz
-7℃
-1) by the tube core of screw thread in the tube core alternative embodiment 1 that the corner is formed by connecting.
Obtain special hose S2.
Embodiment 3
Present embodiment is used to illustrate the preparation method of tube core disclosed by the invention and special hose.
The combined type that sizing material places Zhanjiang equipment Co., Ltd to produce is extruded machine, extrude under 75 ℃, extruded velocity is 8m/min.Obtain pipe A2 after cutting, this pipe has 3 bent angles, and angle is respectively 65 °, 75 ° and 85 °.
Get and the corresponding tube core of pipe configuration, it has 3 bent angles (angle is respectively 65 °, 75 ° and 85 °).This tube core leading portion is that (thermal coefficient of expansion is 2.3 * 10 to aluminium
-5℃
-1), back segment is that (thermal coefficient of expansion is 2 * 10 to invar
-6℃
-1), (material is a copper to 3 bent angles, and thermal coefficient of expansion is 1.77 * 10 with being divided into first changeover portion in the middle of the tube core
-5℃
-1) and second changeover portion (material is an iron, and thermal coefficient of expansion is 1.2 * 10
-5℃
-1).Along tube core, leading portion, first changeover portion, second changeover portion and back segment are arranged in order.Tube core leading portion, first changeover portion, second changeover portion are connected in the corner by screw thread each other with back segment.
With this tube core pipe is carried out punching and handle, obtain pipe to be vulcanized.During punching leading portion is penetrated earlier in the tube chamber of pipe.
Pipe to be vulcanized is placed the steam vulcanization (cure) jar, in 160 ℃, the following sulfuration of 0.6MPa 50min.Obtain the special hose precursor.
The special hose precursor is taken out, adopt manual depoling method that tube core is taken out, obtain special hose S3.
Embodiment 4
Present embodiment is used to illustrate the preparation method of tube core disclosed by the invention and special hose.
The preparation method of special hose is identical with embodiment 3, the different tube core differences that is to use, and tube core is in the present embodiment: leading portion is that (thermal coefficient of expansion is 1.77 * 10 to copper
-5℃
-1), back segment is that (thermal coefficient of expansion is 2 * 10 to tin
-6℃
-1), (material is an iron to 3 bent angles, and thermal coefficient of expansion is 1.2 * 10 with being divided into first changeover portion in the middle of the tube core
-5 -1) and second changeover portion (material is a high-speed steel, and thermal coefficient of expansion is 1.0 * 10
-5℃
-1).Along tube core, leading portion, first changeover portion, second changeover portion and back segment are arranged in order.Tube core leading portion, first changeover portion, second changeover portion are connected in the corner by screw thread each other with back segment.
Obtain special hose S4.
Embodiment 5
Present embodiment is used to illustrate the preparation method of tube core disclosed by the invention and special hose.
The preparation method of special hose is identical with embodiment 3, the different tube core differences that is to use, and tube core is in the present embodiment: leading portion is that (thermal coefficient of expansion is 2.3 * 10 to aluminium
-5℃
-1), back segment is that (thermal coefficient of expansion is 1.86 * 10 to oxygen-free copper
-7℃
-1), (material is an iron to 3 bent angles, and thermal coefficient of expansion is 1.2 * 10 with being divided into first changeover portion in the middle of the tube core
-5℃
-1) and second changeover portion (material is a high-speed steel, and thermal coefficient of expansion is 1.0 * 10
-5℃
-1).Along tube core, leading portion, first changeover portion, second changeover portion and back segment are arranged in order.Tube core leading portion, first changeover portion, second changeover portion are connected in the corner by screw thread each other with back segment.
Simultaneously, prepare mould, this mould has upper die and lower die.Patrix and counterdie be to corresponding, and can be in conjunction with installation.Space between the upper die and lower die is the shape of last rubber tube.
Through punching handle obtain waiting to vulcanize pipe after, when pipe to be vulcanized places mould, patrix closes.Inside is had again and wait that the mould that vulcanizes pipe places the steam vulcanization (cure) jar to vulcanize, the method for sulfuration is identical with embodiment 3.
Obtain special hose S5.
Comparative Examples 1
This Comparative Examples is used to illustrate the preparation method of special hose of the prior art.
The preparation method of special hose is identical with embodiment 1, and different is to adopt the tube core in the existing stainless steel tube core alternate embodiment 1 to carry out the punching processing.Obtain special hose D1.
Comparative Examples 2
This Comparative Examples is used to illustrate the preparation method of special hose of the prior art.
The preparation method of special hose is identical with embodiment 3, and different is to adopt the tube core in the existing stainless steel tube core alternate embodiment 3 to carry out the punching processing.Obtain special hose D2.
Comparative Examples 3
This Comparative Examples is used for the preparation method of comparative illustration special hose disclosed by the invention.
The preparation method of special hose is identical with embodiment 3, and different is, when carrying out punching and handle, the back segment of tube core is penetrated earlier in the tube chamber of tube core.Obtain special hose D3.
Performance test
Carry out following performance test according to above-mentioned rubber tube S1-S5, D1, D2 and the D3 for preparing:
1, internal diameter size
Directly adopt vernier caliper measurement to measure GBT 9573 (2003) rubber, plastic flexible pipe and rubber hose assembly dimension measurement method;
Internal diameter size difference computational methods are: the absolute value of leading portion size and back segment dimension difference;
2, bursting property
According to GB/T 18948-2003, cooling system is tested with gum rubber tubing and rubber hose;
3, fatigue behaviour
According to GB/T 18948-2003, cooling system is tested with gum rubber tubing and rubber hose.
The accordingly result of above-mentioned test is charged to table 1.
Table 1
From the test result of table 1 as can be seen, the internal diameter for preparing special hose by method disclosed by the invention is even, and particularly the deviation that goes out of two-port is very little, has improved the quality of product greatly.In addition, every performance of rubber tube has all reached instructions for use.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a tube core comprises straight leading portion and back segment, and bent angle; Described leading portion, bent angle and back segment are connected successively, and the thermal coefficient of expansion of described leading portion is greater than the thermal coefficient of expansion of back segment.
2. tube core according to claim 1 is characterized in that, described bent angle angle is not more than 100 °.
3. tube core according to claim 1 and 2 is characterized in that, the thermal coefficient of expansion of described leading portion is than big (1-3) * 10 of thermal coefficient of expansion of back segment
-5℃
-1
4. tube core according to claim 3 is characterized in that, the thermal coefficient of expansion of described leading portion is (1.2-3.2) * 10
-5℃
-1, the thermal coefficient of expansion of back segment is (1-20) * 10
-7℃
-1
5. according to claim 1 or 4 described tube cores, it is characterized in that described leading portion material is a kind of in copper, iron, the aluminium, described back segment material is a kind of in invar, quartz, oxygen-free copper or the tin.
6. tube core according to claim 1 is characterized in that, described bent angle has 2 at least, connects by changeover portion between the described bent angle; On the tube core, the thermal coefficient of expansion of leading portion, changeover portion, back segment successively decreases successively.
7. tube core according to claim 6 is characterized in that, described changeover portion has 2 at least; Along tube core, on the direction from the leading portion to the back segment, the thermal coefficient of expansion of the changeover portion trend that tapers off.
8. the preparation method of a special hose comprises:
A, sizing material is extruded, obtained the hollow pipe that inside has tube chamber;
B, tube core is inserted in the tube chamber of pipe, obtain pipe to be vulcanized; Wherein said tube core is any described tube core among the claim 1-7, makes the tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain the special hose precursor;
D, tube core is deviate from, obtained special hose.
9. preparation method according to claim 8 is characterized in that, the method for described sulfuration is: pipe to be vulcanized is placed the steam vulcanization (cure) jar, in 140-165 ℃, the following sulfuration of 0.2-0.8MPa 20-60min.
10. preparation method according to claim 9 is characterized in that, before vulcanizing, earlier pipe to be vulcanized is placed mould, mould is positioned in the steam vulcanization (cure) jar vulcanizes then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133023.1A CN102198732B (en) | 2010-03-23 | 2010-03-23 | Method for preparing pipe core and hetero-type rubber tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133023.1A CN102198732B (en) | 2010-03-23 | 2010-03-23 | Method for preparing pipe core and hetero-type rubber tube |
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| Publication Number | Publication Date |
|---|---|
| CN102198732A true CN102198732A (en) | 2011-09-28 |
| CN102198732B CN102198732B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010133023.1A Active CN102198732B (en) | 2010-03-23 | 2010-03-23 | Method for preparing pipe core and hetero-type rubber tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591391A (en) * | 2013-07-17 | 2014-02-19 | 扬州巨业耐磨复合材料有限责任公司 | Method for processing rubber composited steel pipes |
| CN104085062A (en) * | 2014-06-18 | 2014-10-08 | 贵州红阳机械(集团)公司 | Vulcanization technology for flexible rubber bellows |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695932A (en) * | 2004-05-14 | 2005-11-16 | Itt制造企业公司 | Process for the continuous production of a component comprising a bent tubular body |
| CN101046264A (en) * | 2006-03-28 | 2007-10-03 | 东海橡胶工业株式会社 | Resin composite hose of curved shape and method for producing the same |
-
2010
- 2010-03-23 CN CN201010133023.1A patent/CN102198732B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695932A (en) * | 2004-05-14 | 2005-11-16 | Itt制造企业公司 | Process for the continuous production of a component comprising a bent tubular body |
| CN101046264A (en) * | 2006-03-28 | 2007-10-03 | 东海橡胶工业株式会社 | Resin composite hose of curved shape and method for producing the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591391A (en) * | 2013-07-17 | 2014-02-19 | 扬州巨业耐磨复合材料有限责任公司 | Method for processing rubber composited steel pipes |
| CN104085062A (en) * | 2014-06-18 | 2014-10-08 | 贵州红阳机械(集团)公司 | Vulcanization technology for flexible rubber bellows |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102198732B (en) | 2014-03-12 |
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Effective date of registration: 20191129 Address after: 215300 No.22, wapuhe Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee after: Kunshan Weili plastic auto parts Co., Ltd Address before: 518118 Pingshan Road, Pingshan Town, Shenzhen, Guangdong, No. 3001, No. Patentee before: Biyadi Co., Ltd. |
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