CN102366983A - Rubber bellows model lamination manufacturing device and its manufacturing method - Google Patents
Rubber bellows model lamination manufacturing device and its manufacturing method Download PDFInfo
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- CN102366983A CN102366983A CN2011103561220A CN201110356122A CN102366983A CN 102366983 A CN102366983 A CN 102366983A CN 2011103561220 A CN2011103561220 A CN 2011103561220A CN 201110356122 A CN201110356122 A CN 201110356122A CN 102366983 A CN102366983 A CN 102366983A
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Abstract
Relating to a rubber bellows production device and a method of rubber bellows manufacturing with the production device, the invention provides a rubber bellows model lamination manufacturing device and its manufacturing method, and aims to solve problems of existing technologies. The technical scheme is that: the device comprises an upper die, a lower die, a middle die, and a core die, rubber sheets and spacer sheets sleeved on the core die excircle and arranged at intervals are disposed at a hollow part inside the middle die, and gaps are designed between the spacer sheets and the middle die and between the spacer sheets and the core die so that the rubber sheets can be conveniently bonded together interlacedly, thus forming the bellows. The device has greatly simplified structure and substantially reduced die height, thus being suitable for one-piece small scale production and also suitable for batch and mass production, i.e. applicable to soft and low hardness rubber product production and to hard and high hardness rubber product production.
Description
Technical field
The present invention relates to a kind of production equipment of rubber bellows and utilize this production equipment to make the method for bellows, particularly relate to the Apparatus for () and method therefor that a kind of mode that laminates through model is produced rubber bellows.
Technical background
Rubber bellows is diaphragm of rubber cover, rubber telescopic again, and is main and be widely used in the major axis that work back and forth moves back and forth, the isolating seal of stock, like novel corrugated tube valve rod seal valve; Barrier film shell type rod beam-pumping unit etc.When installing and using, an end of bellows is fixed on actionless stiff end, and the other end is fixed on movable end; With moving back and forth of major axis or stock, bellows (diaphragm case, telescopic) elongates or shortens, as does not have other restriction; Ripple almost disappears when the longest; The most in short-term bellows-folded together, as long as the own not damaged of bellows and produce leakage, the inside and outside medium of bellows just can't leak.
At present, the method for manufacturing of rubber bellows mainly contains three kinds: A, modelling, B, vacuum suction method, C, the dip-coating method of forming.
Modelling: modelling is that rubber bellows manufacturing modelling is used the earliest, modal method, and main is to adopt horizontal model as shown in Figure 5; Under the few cases; When the bellows diameter is very big, and length very in short-term, also has to adopt upright model as shown in Figure 7.Its principal character is: the outer horizontal model of ripple of rubber bellows is formed by model up and down respectively, upright model respectively by about two semicircle models form.The interior ripple of rubber bellows all is to be formed by core, and for the demoulding smoothly, core need adopt polylith to combine.The product interior solid that modelling is manufactured, applicability is strong, both can be used for jobbing work, also can be used for large quantities of a large amount of productions; Promptly can be used for production soft, the soft durometer sizing material, also can be used for the production of hard, high rigidity sizing material, do not need special installation or special device, also do not need soaked in solvent and preparation rubber cement.Weak point is: model is complicated, and particularly core need be divided into several, and is as shown in Figure 6; The model accuracy of manufacture requires high; Dress delivery type operation easier is big, careless slightlyly just might cause MODEL DAMAGE, damage; The overlap that exists a lot of die parting line, parting line to produce inside and outside the product both had been not easy to repair remove, and also had a strong impact on attractive in appearance; Prior weak point is: because the existence of the tolerance of model manufacture process; The restriction of structure; Cause rubber bellows wall thickness became uneven even easily; It is even to be illustrated in figure 8 as the wall thickness became uneven that axial dipole field causes, and being illustrated in figure 9 as mandrel rigidity, to produce the wall thickness became uneven that the flexible deformation causes inadequately even.So when adopting modelling to manufacture rubber bellows; Rubber bellows wall thickness δ can not be too little (as can not less than the 2-5 millimeter); Can not the be too big (L/A＜5-10) of draw ratio; Special when diameter is little, because producing the wall thickness became uneven that the flexible deformation causes inadequately, mandrel rigidity spares, may produce local perforations (δ=0).And for very long bellows, it is very long that model also needs, and equipment also needs very long, and general equipment just can't have been manufactured.
Vacuum suction method: shown in figure 10; Sizing material is extruded into sebific duct on extruder, with uncured rubber pipe box (core hollow, and contact sizing material surface is provided with the hole that can supply vacuumize) on the core that can vacuumize; Clamp the sebific duct two ends; Just can begin to vacuumize this moment, and under the atmospheric pressure effect, sebific duct tightly is adsorbed on the core outside.In haveing suffered sulfidation, should keep the state of vacuumizing, its purpose one is in order to keep bellows form, the 2nd, and the gas that produces during with sulfuration is constantly extracted out, and is fine and close as far as possible to guarantee internal soundness.The interior ripple of rubber bellows is formed by core, and the outer ripple of rubber bellows is because sebific duct produces absorption under the atmospheric pressure effect, and one of generation is parallel to that the outer ripple of ripple forms in the core outside sebific duct.Adopt the vacuum suction method to manufacture rubber bellows, mould is single, core only, two clamping rings; Simple to operation, die life is long; Rubber bellows wall thickness thickness is even, and draw ratio and length basically can be not restricted.Weak point is: owing to absorption affinity only derives from the pressure reduction that vacuumizes the about both sides of sizing material that produce, compare modelling, this difference force is very little; So; During vacuum adsorption molding, sizing material should be soft on the one hand, and film thickness can not be too thick on the other hand; Like this, will limit some and use the manufacturing of vacuum suction method such as high rigidity, high abrasion sizing material and big wall thickness bellows; Equally, because difference force is very little, during the vacuum suction sulfuration; Can't effectively stop the volatilization of some materials and overflow, cause product density low, compactness is relatively poor; So product with the method manufacturing; Can not be used to seal the medium and the position of having relatively high expectations with the isolating seal performance rate, possibly produce the position of leaking as not being used to seal high-risk fluid media (medium) such as inflammable, explosive, poisonous, perishable, the vacuum suction method needs special vacuum extractor and other vulcanizing deice.
The dip-coating method of forming: the dip-coating method of forming only only needs single solid core (like Figure 11), and sizing material is processed certain density rubber cement, also can directly purchase latex or liquid rubber is filled a prescription, and forming method has cement-dipping method and gluing method.Cement-dipping method immerses the mandrel molding section in rubber cement or the glue exactly fully, utilizes adhesion between rubber cement and the core to soak and hangs up very thin one deck rubber cement, mentions slow drip-dry, if require wall thickness thicker, can carry out repeatedly impregnation, up to reaching needed wall thickness; The gluing method is exactly the method that adopts painting brush brushing or spray gun spraying with rubber cement or glue brushing on core; Can require to adopt repeatedly painting way to reach the wall thickness requirement according to wall thickness equally, vulcanize again after the drying and promptly can manufacture out needed rubber bellows.Dip-coating method of forming mould is single; Easy and simple to handle, die life is very long, and evenness of wall thickness depends on impregnation and coating technique and method; What need particularly point out is to adopt the dip-coating method of forming can manufacture out the very thin rubber bellows of wall thickness (like wall thickness 0.1-0.2 millimeter); And being fit to large quantities of a large amount of productions, rubber gloves, rubber condom etc. are used in typical case's representative as operation.Opposite adopt this method will accomplish that wall thickness is very thick but to lose more than gain, that is to say to be not suitable for doing thick product; Need to use solvent; Only can do flexible products; Can not make wear-resisting high durometer rubber bellows; Can not be used to seal the medium and the position of having relatively high expectations with the isolating seal performance rate; As can not be used to seal high-risk fluid media (medium) such as inflammable, explosive, poisonous, perishable and possibly produce the position of leaking, be that production technology or production facility are all different with the universal product.
Summary of the invention
The objective of the invention is to solve prior art problems, provide a kind of rubber bellows model to laminate making apparatus and preparation method thereof, this device structure is greatly simplified, and mold height greatly reduces, and both can be used for jobbing work, also can be used for large quantities of a large amount of productions; Promptly can be used for production soft, the soft durometer sizing material, also can be used for the production of hard, high rigidity sizing material.
For achieving the above object, the technical scheme that the present invention adopts is: a kind of rubber bellows model laminates making apparatus, comprises upper die and lower die, middle mould and core; Wherein middle mould is the structure of hollow columnar and upper and lower opening, the upper and lower side aperture position of mould during upper die and lower die are separately positioned on, and core passes the hollow part and the counterdie of patrix, middle mould; The hollow part of mould is provided with multi-disc and is enclosed within circular sheet rubber and spacer on the core in said; Sheet rubber and spacer are stacked together at a distance from being provided with between the upper and lower, and wherein circle is adjacent to the core cylindrical in the sheet rubber, and circle is adjacent in sheet rubber cylindrical and the middle mould; The spacer that is adjacent to the core cylindrical; The spaced apart segment distance of circle in its cylindrical and the middle mould, with the spacer that circle in the middle mould is adjacent to, circle and the spaced apart segment distance of core cylindrical in it.
In such scheme; The spacer that said and core cylindrical are adjacent to and with middle mould in the spacer space that is adjacent to of circle be provided with, and the distance at wherein a part of spacer and core cylindrical distance at interval and another part spacer and the interior round interval of middle mould is identical.
In such scheme, said multi-disc sheet rubber consistency of thickness and each several part thickness are even, and said multi-disc spacer consistency of thickness and each several part thickness are even.
In such scheme, the position that circle keeps at a certain distance away in said spacer and the middle mould is provided with the skeleton of ring-type.
In such scheme, the position that said spacer and core cylindrical keep at a certain distance away is provided with the skeleton of ring-type.
In such scheme, the position that said spacer and core cylindrical keep at a certain distance away is provided with the skeleton of ring-type, and the position that circle keeps at a certain distance away in said spacer and middle mould is provided with the skeleton of ring-type.
Adopt the said equipment to make the preparation method of rubber bellows, comprise the following steps:
A, counterdie, middle mould and core are installed;
B, sheet rubber and spacer are stacked up and down, are provided with at interval and are enclosed within on the core hollow part in putting in the mould;
C, patrix is installed, pressurization up and down then, and vulcanizing, make per two near the position that sheet rubber is justified in spacer and middle mould and the core cylindrical is spaced a distance carry out sulfuration adhesion;
D, take away middle mould, patrix withdraws from core, and takes out spacer, promptly gets rubber bellows.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that circle keeps at a certain distance away in spacer and the middle mould.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that spacer and core cylindrical keep at a certain distance away.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that spacer and core cylindrical keep at a certain distance away, and the skeleton of ring-type is arranged on the position that circle keeps at a certain distance away in spacer and the middle mould.
Can find out that from each item technical characterictic of the invention described above its advantage is: utilize the product interior solid of this Apparatus and method for production, can be used for the production of hard, high rigidity sizing material; When mould manufactures and designs; The present invention comes down to rubber bellows to convert into according to the shortest collapsed shape of bellows and to be designed to upright model, so mould structure is greatly simplified from half expansion shape and the horizontal model of Design of length according to bellows; Mold height (horizontal model is length) greatly reduces (less than 1/5～1/10); Adaptability, applicability greatly increase, and both can be used for jobbing work, also can be used for large quantities of a large amount of productions; Promptly can be used for production soft, the soft durometer sizing material, also can be used for the production of hard, high rigidity sizing material, do not need special installation or special device, also do not need soaked in solvent and preparation rubber cement, simple to operation, die life is long; Rubber bellows wall thickness thickness is even, and draw ratio and length basically can be not restricted; The setting of spacer among the present invention, its cylindrical and interior circle are consistent with the cylindrical and the interior circle of corresponding mould, and the instability of sizing material flows when having reduced the sulfuration extrusion forming; This equipment die clearance is little, good rigidity, and wearability is good, and the instability of sizing material flows when having reduced the sulfuration extrusion forming; In practical operation; Spacer and middle grinding out or core cylindrical have the interference of appropriateness; Spacer has enough rigidity and intensity when the sulfuration pressurization; To reduce or to resist the mobile area of isolation that is caused of sizing material trace or the random change of bond site, once more, spacer is convenient to remove after product vulcanizates.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation after the present invention installs skeleton;
Fig. 3 is the structural representation after the bellows of made of the present invention launches;
Fig. 4 is that made bellows of the present invention is installed the sketch map that launches behind the skeleton;
Fig. 5 is the horizontal simulator that the prior art modelling is produced;
Fig. 6 is the sectional view of Fig. 5 core mould;
Fig. 7 is the upright model equipment that the prior art modelling is produced;
Fig. 8 is because axial dipole field causes the even sketch map of wall thickness became uneven during existing modelling is produced;
Fig. 9 is during existing modelling is produced because mandrel rigidity produces the even sketch map of wall thickness became uneven that the flexible deformation causes inadequately;
Figure 10 is a prior art vacuum suction method device therefor sketch map;
Figure 11 is a prior art dip-coating method of forming device therefor sketch map;
The 4th, core 5 is that sheet rubber 6 is that spacer 7 is skeletons.
The specific embodiment
Below through specific embodiment and combine accompanying drawing that the present invention is done further explanation:
Shown in Fig. 1-4: present embodiment is that a kind of rubber bellows model laminates making apparatus, comprises upper die and lower die, middle mould and core, and wherein middle mould is the structure of hollow columnar and upper and lower opening; The upper and lower side aperture position of mould during upper die and lower die are separately positioned on; Core passes the hollow part and the counterdie of patrix, middle mould, and the hollow part of said middle mould is provided with multi-disc and is enclosed within circular sheet rubber and spacer on the core, and sheet rubber and spacer are stacked together at a distance from being provided with between the upper and lower; Wherein circle is adjacent to the core cylindrical in the sheet rubber; Circle is adjacent in sheet rubber cylindrical and the middle mould, with the spacer that the core cylindrical is adjacent to, and the spaced apart segment distance of circle in its cylindrical and the middle mould; With the spacer that circle in the middle mould is adjacent to, circle and the spaced apart segment distance of core cylindrical in it.
In such scheme; The spacer that said and core cylindrical are adjacent to and with middle mould in the spacer space that is adjacent to of circle be provided with, and the distance at wherein a part of spacer and core cylindrical distance at interval and another part spacer and the interior round interval of middle mould is identical.
In such scheme, said multi-disc sheet rubber consistency of thickness and each several part thickness are even, and said multi-disc spacer consistency of thickness and each several part thickness are even.
In such scheme, the position that circle keeps at a certain distance away in said spacer and the middle mould is provided with the skeleton of ring-type.
In such scheme, the position that said spacer and core cylindrical keep at a certain distance away is provided with the skeleton of ring-type.
In such scheme, the position that said spacer and core cylindrical keep at a certain distance away is provided with the skeleton of ring-type, and the position that circle keeps at a certain distance away in said spacer and middle mould is provided with the skeleton of ring-type.
Adopt the said equipment to make the preparation method of rubber bellows, comprise the following steps:
A, counterdie, middle mould and core are installed;
B, sheet rubber and spacer are stacked up and down, are provided with at interval and are enclosed within on the core hollow part in putting in the mould;
C, patrix is installed, pressurization up and down then, and vulcanizing, make per two near the position that sheet rubber is justified in spacer and middle mould and the core cylindrical is spaced a distance carry out sulfuration adhesion;
D, take away middle mould, patrix withdraws from core, and takes out spacer, promptly gets rubber bellows.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that circle keeps at a certain distance away in spacer and the middle mould.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that spacer and core cylindrical keep at a certain distance away.
Comprise among the step b of said method: the skeleton of ring-type is arranged on the position that spacer and core cylindrical keep at a certain distance away, and the skeleton of ring-type is arranged on the position that circle keeps at a certain distance away in spacer and the middle mould.
Concrete function and principle are interpreted as: as shown in Figure 1; The present invention has at first inherited the advantage of existing modelling; The product interior solid; The production that can be used for hard, high rigidity sizing material, and the invention property equipment is designed to the inside and outside arranged alternate of spacer, the vertical pressuring method of sheet rubber (being sizing material) stack forms.Simultaneously, when the present invention manufactures and designs at the equipment mould, be from half expansion shape and the horizontal model of Design of length according to bellows with rubber bellows; Convert into according to the shortest collapsed shape of bellows and be designed to upright model; So mould structure is greatly simplified, mold height (horizontal model is length) greatly reduces (less than 1/5～1/10), and adaptability, applicability greatly increase; Both can be used for jobbing work, also can be used for large quantities of a large amount of productions; Promptly can be used for production soft, the soft durometer sizing material, also can be used for the production of hard, high rigidity sizing material, do not need special installation or special device, also do not need soaked in solvent and preparation rubber cement; Simple to operation, die life is long; Rubber bellows wall thickness thickness is even, and draw ratio and length basically can be not restricted.Adopting this Apparatus for () and method therefor to manufacture rubber bellows it is emphasized that: the effect of spacer among the present invention: the effect of spacer; As the term suggests be exactly buffer action, centrifugation, partition effect; The position that spacer is promptly arranged; Self-adhesion between the sizing material neither takes place in the sizing material on spacer both sides, and mutually sticking between sizing material and the spacer do not taken place yet, and to be exactly us hope at the position of not having a spacer bonding close part; The heat cure conglutination reaction can not take place in spacer and rubber; Be in effective control in order to guarantee bonding or to isolate the position; The spacer thickness is even, and cylindrical or interior round size are accurate, and makes the round interference that appropriateness is arranged in spacer and core cylindrical or the middle mould; Spacer has enough rigidity and intensity in when pressurization sulfuration, reduces or resists sizing material trace the flow area of isolation that caused or the random change of bond site; Spacer is convenient to remove after product vulcanizates.In the further scheme, unvulcanized film for rubber (and sheet rubber) thickness uniformity, cylindrical and interior circle are consistent with the cylindrical and the interior circle of corresponding mould simultaneously, the instability of sizing material flows when reducing the sulfuration extrusion forming so that try one's best.In this equipment, the die clearance is little, good rigidity, and wearability is good, and the instability of sizing material flows in the time of guaranteeing to reduce the sulfuration extrusion forming.
As shown in Figure 2, adopt this Apparatus and method for can be, or inside and outside circle two places all add upper skeleton at cylindrical place or inner circle; Make sulfuration back bellows become the rubber bellows of outer round belt skeleton; The rubber bellows of perhaps interior round belt skeleton, perhaps inside and outside circle can guarantee so more that all with the rubber bellows of skeleton rubber bellows is when back and forth stretching; Rubber bellows is close to cylindrical and is moved; Circle moved in perhaps rubber bellows was close to, and perhaps rubber bellows is close to inside and outside circle and is moved, and caused rubber bellows to twine and was damaged with the fluctuation of avoiding turbulent flow to produce.
In above-mentioned Fig. 3 and 4, if rubber is pure glue, be exactly pure glue rubber bellows, if rubber is transformed into sheblack rubber insertion sheet, then be made into the canvas filler rubber bellows.
Disclosed all characteristics in this specification except mutually exclusive characteristic, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
Claims (10)
1. a rubber bellows model laminates making apparatus; Comprise patrix (1), counterdie (2), middle mould (3) and core (4); Wherein middle mould (3) is the structure of hollow columnar and upper and lower opening, and patrix (1) and counterdie (2) are separately positioned on the upper and lower side aperture position of middle mould (3), and core (4) passes the hollow part and the counterdie (2) of patrix (1), middle mould (3); It is characterized in that said in the hollow part of mould (3) be provided with multi-disc and be enclosed within circular sheet rubber (5) and spacer (6) on the core (4); Sheet rubber (5) and spacer (6) are stacked together at a distance from being provided with between the upper and lower, and wherein circle is adjacent to core (4) cylindrical in the sheet rubber (5), and circle is adjacent in sheet rubber (5) cylindrical and the middle mould (3); The spacer (6) that is adjacent to core (4) cylindrical; The spaced apart segment distance of circle in its cylindrical and the middle mould (3), with the spacer (6) that circle in the middle mould (3) is adjacent to, circle and the spaced apart segment distance of core (4) cylindrical in it.
2. a kind of rubber bellows model according to claim 1 laminates making apparatus; It is characterized in that; Spacer (6) that said and core (4) cylindrical is adjacent to and spacer (6) the space setting that is adjacent to the interior circle of middle mould (3), and wherein a part of spacer (6) is identical with the distance at core (4) cylindrical interval and the distance at another part spacer (6) and the interior circle of middle mould (3) interval.
3. a kind of rubber bellows model according to claim 1 and 2 laminates making apparatus, it is characterized in that, said multi-disc sheet rubber (5) consistency of thickness and each several part thickness are even, and said multi-disc spacer (6) consistency of thickness and each several part thickness are even.
4. a kind of rubber bellows model according to claim 1 and 2 laminates making apparatus, it is characterized in that, the position that circle keeps at a certain distance away in said spacer (6) and the middle mould (3) is provided with the skeleton (7) of ring-type.
5. a kind of rubber bellows model according to claim 1 and 2 laminates making apparatus, it is characterized in that, the position that said spacer (6) and core (4) cylindrical keep at a certain distance away is provided with the skeleton (7) of ring-type.
6. a kind of rubber bellows model according to claim 4 laminates making apparatus, it is characterized in that, the position that said spacer (6) and core (4) cylindrical keep at a certain distance away is provided with the skeleton (7) of ring-type.
7. adopt the said equipment to make the preparation method of rubber bellows, it is characterized in that comprising the following steps:
A, counterdie (2), middle mould (3) and core (4) are installed;
B, sheet rubber (5) and spacer (6) are stacked up and down, are provided with at interval and are enclosed within on the core (4), put into the hollow part in the middle mould (3);
C, patrix (1) is installed, pressurization up and down then, and vulcanizing, make per two near the position that sheet rubber (5) is justified in spacer (6) and middle mould (3) and core (4) cylindrical is spaced a distance carry out sulfuration adhesion;
D, take away middle mould (3), patrix (1) withdraws from core (4), and takes out spacer (6), promptly gets rubber bellows.
8. preparation method according to claim 7 is characterized in that comprising among the step b: the skeleton (7) of ring-type is arranged on spacer (6) and the interior round position that keeps at a certain distance away of middle mould (3).
9. preparation method according to claim 7 is characterized in that comprising among the step b: the skeleton (7) of ring-type is arranged on the position that spacer (6) and core (4) cylindrical keep at a certain distance away.
10. preparation method according to claim 8 is characterized in that comprising among the step b: the skeleton (7) of ring-type is arranged on the position that spacer (6) and core (4) cylindrical keep at a certain distance away.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106003778A (en) * | 2016-05-13 | 2016-10-12 | 中策橡胶集团有限公司 | Preparation device and preparation method for bladder body of tire molded rubber bladder |
| CN106426994A (en) * | 2016-08-25 | 2017-02-22 | 江苏飞天管道设备有限公司 | Polypropylene-rubber composite corrugated pipe |
| CN107803960A (en) * | 2017-11-29 | 2018-03-16 | 青岛开世密封工业有限公司 | A kind of anti-eccentric mould of long length hose and its application method |
| CN107901438A (en) * | 2017-11-08 | 2018-04-13 | 江苏科瑞斯机件有限公司 | A kind of bellows protective cover processing technology |
| CN112989476A (en) * | 2021-04-07 | 2021-06-18 | 河南工业大学 | Building design model manufacturing equipment and using method |
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| CN101868345A (en) * | 2007-11-22 | 2010-10-20 | 丸五橡胶工业株式会社 | Strengthen the manufacture method of rubber hose |
| CN202318701U (en) * | 2011-11-11 | 2012-07-11 | 四川新为橡塑有限公司 | Laminate manufacturing equipment of corrugated rubber pipe model |
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| JPS6433320A (en) * | 1987-07-28 | 1989-02-03 | Mitsui Toatsu Chemicals | Method and apparatus for bellows-folding of flexible cylindrical film |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003778A (en) * | 2016-05-13 | 2016-10-12 | 中策橡胶集团有限公司 | Preparation device and preparation method for bladder body of tire molded rubber bladder |
| CN106426994A (en) * | 2016-08-25 | 2017-02-22 | 江苏飞天管道设备有限公司 | Polypropylene-rubber composite corrugated pipe |
| CN107901438A (en) * | 2017-11-08 | 2018-04-13 | 江苏科瑞斯机件有限公司 | A kind of bellows protective cover processing technology |
| CN107803960A (en) * | 2017-11-29 | 2018-03-16 | 青岛开世密封工业有限公司 | A kind of anti-eccentric mould of long length hose and its application method |
| CN112989476A (en) * | 2021-04-07 | 2021-06-18 | 河南工业大学 | Building design model manufacturing equipment and using method |
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| Publication number | Publication date |
|---|---|
| CN102366983B (en) | 2013-12-04 |
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