CN102198732B - 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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- CN102198732B CN102198732B CN201010133023.1A CN201010133023A CN102198732B CN 102198732 B CN102198732 B CN 102198732B CN 201010133023 A CN201010133023 A CN 201010133023A CN 102198732 B CN102198732 B CN 102198732B
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- tube core
- expansion
- pipe
- leading portion
- thermal coefficient
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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, the especially different in nature method of managing tube core and being prepared special hose by this tube core.
Background technology
In daily life, rubber tube, especially automobile are more and more extensive with the use of rubber tube.Conventionally, the preparation method of rubber tube is generally divided into compression molding and extrudes two kinds of modes of rear punching sulfidization molding.
The method of compression molding refers to puts into mould compression molding by sizing material, then puts into vulcanizing press through sulfidization molding.The method need to first process the molding die that meets shape of product and angle conventionally, and this mould is comprised of the support tube core two parts in the middle of bolster and sebific duct.The smooth surface of rubber tube prepared by the method, 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 rubber tube product obviously eccentric, cause product yield extremely low.
Extrude the method for rear punching sulfidization molding, refer to the rubber tube blank of extruding first continuously hollow, then pipe penetrates above the tube core of definite shape, puts into steam vulcanization (cure) tank sulfidization molding.The 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 rear bent angle back segment, cause the whole internal diameter size of shape tube, especially two-port inner diameter deviation is larger, greatly reduces the quality of shape tube product.
Summary of the invention
The present invention is in order to overcome in prior art when extruding rear punching sulfidization molding and prepare shape tube, the larger 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 of preparing by this pipe is little, has greatly improved the quality of shape tube product.
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 tube core to prepare 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 tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain special hose precursor;
D, tube core is deviate from, obtained special hose.
In the preparation process of special hose, after sizing material is extruded, the pipe uncured obtaining, dimensional stability is not enough, makes it at the product obtaining, easily occur the problem of change in size after follow-up sulfuration.Especially shape tube has bent angle, makes its this problem more outstanding.And in method disclosed by the invention, by to the specific adjusted of tube core and selection, and the control of method when preparing 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, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit 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, the shape of tube core and special hose to be prepared is corresponding.Tube core by said structure can solve other problem of special hose product difference in internal diameters preferably.Meanwhile, inventor's discovery, the angle of bent angle on special hose to be prepared (being the bent angle of tube core accordingly) is less, and its internal diameter difference is larger.For better embodying, eliminate other effect of special hose difference in internal diameters, under preferable case, described bent angle angle is not more than 100 °, more preferably 55-85 °.When having the special hose of above-mentioned scope inside corners, preparation adopts the 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 large (1-3) * 10 of the thermal coefficient of expansion of back segment
-5℃
-1, under preferable case, the thermal coefficient of expansion of leading portion is than large (2-3) * 10 of the thermal coefficient of expansion of back segment
-5℃
-1.When preparing the special hose of different materials, the thermal coefficient of expansion of tube core leading portion and back segment can regulate according to actual use procedure, and special hose internal diameter difference is reduced.
Independent, for the leading portion of described tube core, under preferable case, its thermal coefficient of expansion is (1.2-3.2) * 10
-5℃
-1, (2.1-3.1) * 10 more preferably
-5℃
-1.For the back segment of described tube core, under preferable case, its thermal coefficient of expansion is (1-20) * 10
-7℃
-1, (1-10) * 10 more preferably
-7℃
-1.
Wherein, for the material of tube core leading portion, can be selected from a kind of in copper, iron, aluminium, be preferably a kind of in aluminium, copper; Relative, for the material of tube core back segment, can be selected from a kind of in invar, quartz, tin, oxygen-free copper, be preferably a kind of in invar, tin, quartz.
The 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 materials to prepare 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.
Conventionally, on the special hose of required preparation bent angle quantity may have a plurality of, so in above-mentioned disclosed tube core, bent angle can or have 2 for 1 accordingly, as being 2-4.Between described bent angle, by changeover portion, connect; On tube core, the thermal coefficient of expansion of leading portion, changeover portion, back segment successively decreases successively.Now, above-mentioned changeover portion may be 1 or a plurality of.According to the actual needs of preparing, described changeover portion can have more than 2, as 2-4; When above-mentioned changeover portion is while being a plurality of, under preferable case, along tube core, in the direction from leading portion to back segment, the thermal coefficient of expansion of the above-mentioned a plurality of changeover portions trend that tapers off.
Under preferable case, the material of above-mentioned changeover portion does not require, and only need meet the requirement of above-mentioned thermal coefficient of expansion, for example can be in high-speed steel, carbon steel, spring steel a kind of.Equally, the plurality of changeover portion directly can combine by the mode of welding or be threaded with bent angle.
More preferably in situation, when described changeover portion only has one, along tube core, in the direction from leading portion to back segment, the trend that also tapers off of the thermal coefficient of expansion on this changeover portion.Now can be by least 2 kinds of materials be combined by the mode of welding or be threaded.
In the present invention, not too large requirement of the material that bent angle adopts, under preferable case, can adopt an identical material in connected leading portion, back segment or changeover portion.
The preparation method who the invention also discloses a kind 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 tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain special hose precursor;
D, tube core is deviate from, obtained special hose.
According to the present invention, prepare the various sizing materials that special hose sizing material used can be that this area is conventional, as described in 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.
By when preparing sizing material, can carry out banburying and open refining sizing material, each composition in sizing material is further mixed, and promote the generation of some reactions, improve the performance of last special hose product.
Wherein, described banburying method is the conventional method in this area, as banburying condition is: the various components of sizing compound formula are joined in banbury (iceberg, Dalian rubber and plastics machine Co., Ltd) to persistently overheating mixing 4-5min; When reaching 120 ℃, temperature opens floating weight of banbury mixer, exhaust 1-3 time.Then close floating weight, continue to be warming up to discharge after 130 ℃ of mixing 2-3min, obtain elastomeric compound.
The described smelting method of opening is the conventional method in this area, as opens refining condition and be: elastomeric compound is placed in to mill (iceberg, Dalian rubber and plastics machine Co., Ltd) upper, is warming up to 50-80 ℃, open refining time 15-25min.
In the preparation method of special hose disclosed by the invention, the method for extruding is the conventional method in this area, as the above-mentioned sizing material of getting ready being placed in to the combined type of Zhanjiang equipment Co., Ltd production, extrudes machine, at 75 ℃, extrudes, and extruded velocity is 8m/min.In the present invention, the internal diameter of extruding by above-mentioned extruder the pipe obtaining is thought consistent with external diameter.
After extruder is extruded continuously, obtain special hose pipe, can according to actual needs, be cut into the pipe of certain length.
Obtain after pipe, above-mentioned tube core can be inserted in the tube chamber of pipe, obtain pipe to be vulcanized; Wherein, make tube core leading portion be introduced into tube chamber during insertion.The method of above-mentioned insertion tube core is the conventional methods of those skilled in the art, again repeats no more.
In pipe, insert after 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 in to steam vulcanization (cure) tank, under 140-165 ℃, 0.2-0.8MPa, vulcanize 20-60min, be preferably under 145-155 ℃, 0.4-0.55MPa and vulcanize 25-35min.After vulcanizing by the method, can obtain special hose precursor.
In this area, while adopting said method to vulcanize, because pipe is directly exposed in steam, in sulfidation, water can be condensed in pipe surface, makes the product surface finally obtaining occur " washmarking ".In order to improve the apparent property of special hose product, under preferable case, can first pipe to be vulcanized be placed in to mould, then mould is positioned in steam vulcanization (cure) tank and is vulcanized, conditions of vulcanization is identical with aforementioned condition, obtains special hose precursor.After sulfuration, special hose precursor is taken out from mould.
In above-mentioned vulcanization process, mould can adopt existing various mould, as conventional molding die, only needs pipe outer wall to be vulcanized to surround, and exists with the corresponding groove of pipe to be vulcanized the shape maintenance of pipe to be vulcanized in sulfidation stablized.
Obtain can carrying out depoling after special hose precursor.The method that the method for depoling can be known to the skilled person, as can be directly manually taken out tube core 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 tube core, then pass into gases at high pressure, make special hose precursor separated with tube core, then wink takes out tube core.
Because special hose precursor has passed through vulcanizing treatment, there is good resilience.Processing in depoling process can not produce substantial effect to the size of special hose product.
Below by embodiment, the present invention is further illustrated.
The sizing compound formula adopting in the embodiment of the present invention and comparative example 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 banbury (iceberg, Dalian rubber and plastics machine Co., Ltd) to persistently overheating mixing 5min; When reaching 120 ℃, temperature opens floating weight of banbury mixer, exhaust 3 times.Then close floating weight, continue to be warming up to discharge after 130 ℃ of mixing 3min, obtain elastomeric compound.
Elastomeric compound is placed in to mill (iceberg, Dalian rubber and plastics machine Co., Ltd) above, is warming up to 80 ℃, open refining 20min.Obtain sizing material standby.
Embodiment 1
The present embodiment is for illustrating the preparation method of tube core disclosed by the invention and special hose.
The combined type that sizing material is placed in to the production of Zhanjiang equipment Co., Ltd is extruded machine, at 75 ℃, extrudes, and extruded velocity is 8m/min.After cutting, obtain pipe A1, this pipe has the bent angle of 1 80 °.
Get and the corresponding tube core of pipe configuration, it has the bent angle of 1 80 °.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) by screw thread, in corner, be formed by connecting.
With this tube core, pipe is carried out to punching processing, obtain pipe to be vulcanized.One end that the material of take during punching is aluminium is leading portion, first penetrates in the tube chamber of pipe.
Pipe to be vulcanized is placed in to steam vulcanization (cure) tank, under 150 ℃, 0.4MPa, vulcanizes 30min.Obtain special hose precursor.
Special hose precursor is taken out, adopt manual depoling method that tube core is taken out, obtain special hose S1.
Embodiment 2
The present embodiment is for illustrating 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) tube core in the tube core alternative embodiment 1 that is formed by connecting in corner by screw thread.
Obtain special hose S2.
Embodiment 3
The present embodiment is for illustrating the preparation method of tube core disclosed by the invention and special hose.
The combined type that sizing material is placed in to the production of Zhanjiang equipment Co., Ltd is extruded machine, at 75 ℃, extrudes, and extruded velocity is 8m/min.After cutting, obtain pipe A2, 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), by being divided into First Transition section in the middle of tube core, (material is copper to 3 bent angles, and thermal coefficient of expansion is 1.77 * 10
-5℃
-1) and the second changeover portion (material is iron, and thermal coefficient of expansion is 1.2 * 10
-5℃
-1).Along tube core, leading portion, First Transition section, the second changeover portion and back segment are arranged in order.Tube core leading portion, First Transition section, the second changeover portion are connected in corner by screw thread each other with back segment.
With this tube core, pipe is carried out to punching processing, obtain pipe to be vulcanized.During punching, leading portion is first penetrated in the tube chamber of pipe.
Pipe to be vulcanized is placed in to steam vulcanization (cure) tank, under 160 ℃, 0.6MPa, vulcanizes 50min.Obtain special hose precursor.
Special hose precursor is taken out, adopt manual depoling method that tube core is taken out, obtain special hose S3.
Embodiment 4
The present embodiment is for illustrating the preparation method of tube core disclosed by the invention and special hose.
The preparation method of special hose is identical with embodiment 3, and different is that the tube core using is different, and in the present embodiment, tube core is: 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), by being divided into First Transition section in the middle of tube core, (material is iron to 3 bent angles, and thermal coefficient of expansion is 1.2 * 10
-5?
-1) and the second changeover portion (material is high-speed steel, and thermal coefficient of expansion is 1.0 * 10
-5℃
-1).Along tube core, leading portion, First Transition section, the second changeover portion and back segment are arranged in order.Tube core leading portion, First Transition section, the second changeover portion are connected in corner by screw thread each other with back segment.
Obtain special hose S4.
Embodiment 5
The present embodiment is for illustrating the preparation method of tube core disclosed by the invention and special hose.
The preparation method of special hose is identical with embodiment 3, and different is that the tube core using is different, and in the present embodiment, tube core is: 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), by being divided into First Transition section in the middle of tube core, (material is iron to 3 bent angles, and thermal coefficient of expansion is 1.2 * 10
-5℃
-1) and the second changeover portion (material is high-speed steel, and thermal coefficient of expansion is 1.0 * 10
-5℃
-1).Along tube core, leading portion, First Transition section, the second changeover portion and back segment are arranged in order.Tube core leading portion, First Transition section, the second changeover portion are connected in corner by screw thread each other with back segment.
Meanwhile, prepare mould, this mould has upper die and lower die.Patrix with counterdie to corresponding, and can be in conjunction with installation.Space between upper die and lower die is the shape of last rubber tube.
Through punching, process and obtain after vulcanizing pipe, when pipe to be vulcanized is placed in mould, patrix closes.The mould again inside to pipe to be vulcanized is placed in steam vulcanization (cure) tank and vulcanizes, and the method for sulfuration is identical with embodiment 3.
Obtain special hose S5.
Comparative example 1
This comparative example is for illustrating the preparation method of special hose of the prior art.
The preparation method of special hose is identical with embodiment 1, different, adopts the tube core in existing stainless steel tube core alternate embodiment 1 to carry out punching processing.Obtain special hose D1.
Comparative example 2
This comparative example is for illustrating the preparation method of special hose of the prior art.
The preparation method of special hose is identical with embodiment 3, different, adopts the tube core in existing stainless steel tube core alternate embodiment 3 to carry out punching processing.Obtain special hose D2.
Comparative example 3
This comparative example is for the preparation method of comparative illustration special hose disclosed by the invention.
The preparation method of special hose is identical with embodiment 3, different, when carrying out punching processing, the back segment of tube core is first penetrated in the tube chamber of tube core.Obtain special hose D3.
Performance test
According to above-mentioned rubber tube S1-S5, D1, D2 and the D3 preparing, carry out following performance test:
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 by gum rubber tubing and rubber hose;
3, fatigue behaviour
According to GB/T 18948-2003, cooling system is tested by 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, can find out, the internal diameter for preparing special hose by method disclosed by the invention is even, and the deviation that particularly two-port goes out is very little, has greatly improved the quality of product.In addition, the properties of rubber tube has all reached instructions for use.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
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; The thermal coefficient of expansion of described leading portion is than large (1-3) * 10 of the thermal coefficient of expansion of back segment
-5℃
-1.
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, 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.
4. according to the tube core described in claim 1 or 3, it is characterized in that, described leading portion material is a kind of in copper, iron, aluminium, and described back segment material is a kind of in invar, quartz, oxygen-free copper or tin.
5. tube core according to claim 1, is characterized in that, described bent angle has 2 at least, between described bent angle, by changeover portion, connects; On tube core, the thermal coefficient of expansion of leading portion, changeover portion, back segment successively decreases successively.
6. tube core according to claim 5, is characterized in that, described changeover portion has 2 at least; Along tube core, in the direction from leading portion to back segment, the thermal coefficient of expansion of the changeover portion trend that tapers off.
7. a preparation method for 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 the tube core described in any one in claim 1-6, makes tube core leading portion be introduced into tube chamber during insertion;
C, pipe to be vulcanized is vulcanized, obtain special hose precursor;
D, tube core is deviate from, obtained special hose.
8. preparation method according to claim 7, is characterized in that, the method for described sulfuration is: pipe to be vulcanized is placed in to steam vulcanization (cure) tank, under 140-165 ℃, 0.2-0.8MPa, vulcanizes 20-60min.
9. preparation method according to claim 8, is characterized in that, before vulcanizing, first pipe to be vulcanized is placed in to mould, then mould is positioned in steam vulcanization (cure) tank and is vulcanized.
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 CN102198732A (en) | 2011-09-28 |
| CN102198732B true 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103591391B (en) * | 2013-07-17 | 2016-01-20 | 扬州巨业耐磨复合材料有限责任公司 | A kind of processing method of rubber combined steel pipe |
| 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 |
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| CN102198732A (en) | 2011-09-28 |
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