CN1189312C - Polyurethane enhancing flexible pipe and its manufacturing methods - Google Patents
Polyurethane enhancing flexible pipe and its manufacturing methods Download PDFInfo
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- CN1189312C CN1189312C CN 03121929 CN03121929A CN1189312C CN 1189312 C CN1189312 C CN 1189312C CN 03121929 CN03121929 CN 03121929 CN 03121929 A CN03121929 A CN 03121929A CN 1189312 C CN1189312 C CN 1189312C
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- flexible pipe
- polyurethane
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- steel wire
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Abstract
The present invention provides a polyurethane reinforced flexible pipe and a preparation method thereof. The reinforced flexible pipe is composed of an inner core, a middle reinforced layer and an outer protective layer and is characterized in that the inner core is a thin-walled polyurethane flexible pipe; the middle reinforced layer is knitting steel wires; and the outer protective layer is a polyurethane flexible pipe. The preparation method for the reinforced flexible pipe comprises three steps of a polyurethane extrusion process for the inner core, a steel wire knitting process for the middle reinforced layer and a polyurethane coating process for the outer protective layer. The reinforced flexible pipe has the comprehensive advantages of high pressure resistance, corrosion resistance, oil resistance, anti-aging resistance, infrared ray resistance, light weight, no toxin, no smell, etc., and is more suitable for chemical industry and food processing equipment.
Description
Technical field
The present invention relates to the flexible pipe that uses in a kind of hydraulic pressure or the pneumatic circuit, especially relate to a kind of polyurethane and strengthen flexible pipe.The invention still further relates to the manufacture method of this flexible pipe.
Background technology
In existing chemical industry or the food processing equipment, the flexible pipe that is arranged in hydraulic pressure or the pneumatic circuit generally is a rubber hose.Its shortcoming is: not high pressure resistant, easily be corroded, and aging easily.
Summary of the invention
An object of the present invention is provides a kind of polyurethane to strengthen flexible pipe at the deficiencies in the prior art.It has high pressure resistant, corrosion-resistant, oil resistant, ageing-resistant, anti-infrared ray, characteristic such as in light weight, nonpoisonous and tasteless.
Another object of the present invention provides the manufacture method that this polyurethane strengthens flexible pipe.
The objective of the invention is to realize by following technical solution.
A kind of polyurethane strengthens flexible pipe, and it is made up of inner core, middle enhancement layer and external protection, it is characterized in that: inner core is the polyurethane flexible pipe of thin-walled, and middle enhancement layer is a braided steel wire, and external protection is the polyurethane flexible pipe.
In the such scheme, described middle enhancement layer is one deck, two layers or three layers of braided steel wire.
Above-mentioned polyurethane strengthens the manufacture method of flexible pipe, and it comprises the steps:
A. expressing technique
A. inner core is got the raw materials ready: adopt water white polyurethane particles, its hardness can be divided into four kinds of 85A, 90A, 95A, 98A;
B. raw material stoving: 85A, 90A raw material were dried 3-4 hour between 70-100 ℃, and 95A, 98A raw material were dried 3-4 hour between 80-110 ℃, added material bin after the oven dry;
C. extruder preheating: extruder before start preheating 2-3 hour, its design temperature is than the high 10-20 of forming temperature ℃;
D. extrusion molding: start power set, slowly quicken extruded material, adjust temperature to forming temperature, 85A, 90A material forming temperature are between 180-190 ℃, and 95A, 98A material forming temperature are between 185-200 ℃; Start draw-gear then, draw flexible pipe through vacuum plant, bosh is delivered to draw-gear, is pressed on its rubber roll, starts vacuum plant simultaneously, adjusts pressure to be-0.04--0.08Mpa; Thickness of soft tube is between 0.5-4mm;
B. weaving
A. buncher, braider operation are prepared: starter motor, guarantee that each parts works well;
B. reach the standard grade: by specification requirement the bobbin that closes out is contained on the spindle, and adjusts spindle tension force;
C. inner core scutching: the back roughening is handled in the scutching of inner core flexible pipe outer wall, and beater each several part emery wheel gap is adjusted consistent before the operation;
D. weave bonding: the inner core of handling through scutching was drawn adhesive cartridges, mouthful is embossed on the hauling machine, start braider then and weave, the braiding process should be guaranteed angle of weave and stroke; Steel wire and inner core flexible pipe is bonding, during the multilayer steel wire, bonding between each layer steel wire;
C. coating processes
A. prepare: the polyurethane particles after will drying, can be formulated into shades of colour, add material bin; Start power set, adjust temperature;
B. apply: will weave good flexible pipe and pass from mold center, and through bosh, be pressed on the hauling machine, and adjust hauling speed, to reach specific thickness, thickness is 1.5-3mm, adjusts set screw to guarantee to apply the concentricity of epidermis and inner core flexible pipe.
Polyurethane of the present invention strengthens flexible pipe compared with prior art, and have the following advantages: high pressure resistant, corrosion-resistant (acid or alkali), oil resistant, ageing-resistant, anti-infrared ray, in light weight, nonpoisonous and tasteless more are applicable on chemical industry, the food processing equipment and use.Strengthen flexible pipe and adopt above-mentioned manufacture method can on the basis of existing equipment, produce satisfactory polyurethane.
Below in conjunction with embodiment, further specify the present invention.
The specific embodiment
Embodiment 1
1, the processing of inner core flexible pipe:
Extrusion equipment is a special equipment, and it is high about 1.5 times that outfit power ratio is extruded general general-purpose plastics required drive, and the extruder screw draw ratio is 1: 24-1: 28, and compression ratio is 1: 2.5-1: 4.Mould will make runner unobstructed, and the mould compression ratio can not be excessive, and its shaping segment lenght should suitably extend.
A. inner core is got the raw materials ready: adopt water white polyurethane particles, its hardness is 85A, 90A;
B. raw material stoving: 85A, 90A raw material between 70-100 ℃ (preferred 80-90 ℃) were dried 3-4 hour, added material bin after the oven dry;
C. extruder preheating: extruder before start preheating 2-3 hour, its design temperature is than the high 10-20 of forming temperature ℃;
D. extrusion molding: start power set, slowly quicken extruded material, adjust temperature to forming temperature, 85A, 90A material forming temperature are between 180-190 ℃; Start draw-gear then, draw flexible pipe through vacuum plant, bosh is delivered to draw-gear, is pressed on its rubber roll, starts vacuum plant simultaneously, adjusts pressure and reaches the regulation requirement, and pressure is-0.04--0.08Mpa; This moment, polyurethane flexible pipe specification increased 0.8-2mm than finished product flexible pipe specification, and wall thickness remains between the 0.5-4mm, to adapt to the braided steel wire needs.
2, the braiding of middle enhancement layer steel wire:
Buncher installs steel wire by the number of share of stock requirement and adjusts pressure and makes it consistent, then by the slow extremely fast power set that start; Braider is pressed polyurethane flexible pipe specification, and suitable device can be divided into four kinds on 20 ingots, 24 ingots, 36 ingots, 48 ingots, and it is used referring to subordinate list 1.
A. buncher, braider operation are prepared: each lubricant housings filling machine oil and butter, and starter motor guarantees that each parts works well;
B. reach the standard grade: by specification requirement the bobbin that closes out is contained on the spindle, and adjusts spindle tension force;
C. inner core scutching: the back roughening is handled in the scutching of inner core flexible pipe outer wall, and beater each several part emery wheel gap is adjusted consistent before the operation;
D. weave bonding: the inner core of handling through scutching was drawn adhesive cartridges, mouthful is embossed on the hauling machine, starting braider then weaves, the braiding process should be guaranteed angle of weave (angle be 55 ° 44 ') and stroke (stroke is braiding external diameter * 2.22), and the required number of share of stock of its different size inner core is referring to subordinate list 1; Steel wire and inner core flexible pipe is bonding, during the multilayer steel wire, also bonding between each layer steel wire.
3, the coating of external protection polyurethane processing:
Raw material preheating is with the raw material of inner core flexible pipe, and equipment is with the inner core flexible pipe, and the pressure shape of the mouth as one speaks is adopted in the mould design, and head adopts horizontal head.
A. prepare: the polyurethane particles after will drying, can be formulated into shades of colour, add material bin; Start power set, adjust temperature;
B. apply: will weave good flexible pipe and pass from mold center, and through bosh, be pressed on the hauling machine, and adjust hauling speed, to reach specific thickness, thickness is generally 1.5-3mm, adjusts set screw to guarantee to apply the concentricity of epidermis and inner core flexible pipe.
With coated flexible pipe, curl bundled and carry out sign with crimping device, after packing finishes, properly place.
Embodiment 2
Processing method is basic identical with embodiment 1, and different is the processing of inner core flexible pipe:
A. inner core is got the raw materials ready: adopt water white polyurethane particles, its hardness is 95A, 98A;
B. raw material stoving: 95A, 98A raw material were dried 3-4 hour between 80-110 ℃ (preferred 90-100 ℃), added material bin after the oven dry;
D. extrusion molding: 95A, 98A material forming temperature are between 185-200 ℃.
The production method of employing the foregoing description just can process the polyurethane flexible pipe that inner core is a thin-walled, middle enhancement layer is that braided steel wire (intermediate layer can be one deck, two layers or three layers of braided steel wire), external protection are the polyurethane enhancing flexible pipe of polyurethane flexible pipe.
Subordinate list 1
| Product specification | Internal diameter | Wall thickness | The steel wire number of share of stock | The braider kind | The steel wire floor external diameter | Polyurethane strengthens hose outside diameter | Operating pressure Mpa | Minimum bending radius mm |
| TPUG-I-φ6 | 6 | 1 | 4-5 | 20 ingots | 9.7 | 11.6 | 28 | 70 |
| TPUG-I-φ8 | 8 | 1 | 5-6 | 20 ingots | 11.6 | 13.2 | 24 | 80 |
| TPUG-I-φ10 | 10 | 1.25 | 6 | 24 ingots | 14.7 | 16.2 | 22 | 100 |
| TPUG-I-φ13 | 13 | 1.35 | 8 | 24 ingots | 17.7 | 19.5 | 18 | 125 |
| TPUG-I-φ16 | 16 | 1.5 | 6 | 36 ingots | 21.3 | 22.8 | 14 | 150 |
| TPUG-I-φ19 | 19 | 1.5 | 7 | 36 ingots | 24.2 | 26 | 13 | 200 |
| TPUG-I-φ22 | 22 | 2.0 | 9 | 36 ingots | 28 | 29.8 | 11 | 220 |
| TPUG-I-φ25 | 25 | 2.0 | 10 | 36 ingots | 31 | 32.8 | 10 | 250 |
| TPUG-I-φ32 | 32 | 2.5 | 12 | 36 ingots | 39 | 40.8 | 8 | 280 |
| TPUG-I-φ38 | 38 | 3.0 | 6-7 | 48 ingots | 46.2 | 48 | 7 | 300 |
| TPUG-I-φ45 | 45 | 3.0 | 8-9 | 48 ingots | 53 | 54.8 | 65 | 350 |
| TPUG-I-φ51 | 51 | 3.0 | 10-12 | 48 ingots | 59 | 61 | 6 | 400 |
| TPUG-II-φ6 | 6 | 1 | 4-5 | 20 ingots | 11.3 | 12.8 | 45 | 70 |
| TPUG-II-φ8 | 8 | 1 | 5-6 | 20 ingots | 12.8 | 14.5 | 40 | 80 |
| TPUG-II-φ10 | 10 | 1.25 | 6 | 24 ingots | 15.8 | 17.7 | 34 | 100 |
| TPUG-II-φ13 | 13 | 1.35 | 8 | 24 ingots | 19 | 20.7 | 30 | 125 |
| TPUG-II-φ16 | 16 | 1.5 | 6 | 36 ingots | 22.4 | 24.2 | 25 | 150 |
| TPUG-II-φ19 | 19 | 1.5 | 7 | 36 ingots | 25.8 | 27.8 | 20 | 200 |
| TPUG-II-φ22 | 22 | 2.0 | 9 | 36 ingots | 29.5 | 31.5 | 15 | 220 |
| TPUG-II-φ25 | 25 | 2.0 | 10 | 36 ingots | 32.3 | 34 | 15 | 250 |
| TPUG-II-φ32 | 32 | 2.5 | 12 | 36 ingots | 40.6 | 42.2 | 12 | 280 |
| TPUG-II-φ38 | 38 | 3.0 | 67 | 48 ingots | 47.7 | 49.5 | 11 | 300 |
| TPUG-II-φ45 | 45 | 3.0 | 8-9 | 48 ingots | 54.5 | 56.3 | 10 | 350 |
| TPUG-II-φ51 | 51 | 3.0 | 10-12 | 48 ingots | 60.5 | 62.5 | 9 | 400 |
Claims (5)
1, a kind of polyurethane strengthens flexible pipe, and it is made up of inner core, middle enhancement layer and external protection, it is characterized in that: inner core is the polyurethane flexible pipe of thin-walled, and middle enhancement layer is a braided steel wire, and external protection is the polyurethane flexible pipe.
2, polyurethane according to claim 1 strengthens flexible pipe, it is characterized in that: enhancement layer is one deck, two layers or three layers of braided steel wire in the middle of described.
3, a kind of polyurethane as claimed in claim 1 or 2 strengthens the production method of flexible pipe, and it is characterized in that: it comprises the steps:
A. expressing technique
A. inner core is got the raw materials ready: adopt water white polyurethane particles, its hardness can be divided into four kinds of 85A, 90A, 95A, 98A;
B. raw material stoving: 85A, 90A raw material were dried 3-4 hour between 70-100 ℃, and 95A, 98A raw material were dried 3-4 hour between 80-110 ℃, added material bin after the oven dry;
C. extruder preheating: extruder before start preheating 2-3 hour, its design temperature is than the high 10-20 of forming temperature ℃;
D. extrusion molding: start power set, slowly quicken extruded material, adjust temperature to forming temperature, 85A, 90A material forming temperature are between 180-190 ℃, and 95A, 98A material forming temperature are between 185-200 ℃; Start draw-gear then, draw flexible pipe through vacuum plant, bosh is delivered to draw-gear, is pressed on its rubber roll, starts vacuum plant simultaneously, adjusts pressure to be-0.04--0.08Mpa; Thickness of soft tube is between 0.5-4mm;
B. weaving
A. buncher, braider operation are prepared: starter motor, guarantee that each parts works well;
B. reach the standard grade: by specification requirement the bobbin that closes out is contained on the spindle, and adjusts spindle tension force;
C. inner core scutching: the back roughening is handled in the scutching of inner core flexible pipe outer wall, and beater each several part emery wheel gap is adjusted consistent before the operation;
D. weave bonding: the inner core of handling through scutching was drawn adhesive cartridges, mouthful is embossed on the hauling machine, start braider then and weave, the braiding process should be guaranteed angle of weave and stroke; Steel wire and inner core flexible pipe is bonding, during the multilayer steel wire, bonding between each layer steel wire;
C. coating processes
A. prepare: the polyurethane particles after will drying, can be formulated into shades of colour, add material bin; Start power set, adjust temperature;
B. apply: will weave good flexible pipe and pass from mold center, and through bosh, be pressed on the hauling machine, and adjust hauling speed, to reach specific thickness, thickness is 1.5-3mm, adjusts set screw to guarantee to apply the concentricity of epidermis and inner core flexible pipe.
4, production method according to claim 3 is characterized in that: in the described expressing technique, during raw material stoving, 85A, 90A raw material are dried between 80-90 ℃, and 95A, 98A raw material are dried between 90-100 ℃.
5, production method according to claim 3 is characterized in that: in the described weaving, angle of weave be 55 ° 44 ', stroke for the braiding external diameter * 2.22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03121929 CN1189312C (en) | 2003-04-18 | 2003-04-18 | Polyurethane enhancing flexible pipe and its manufacturing methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03121929 CN1189312C (en) | 2003-04-18 | 2003-04-18 | Polyurethane enhancing flexible pipe and its manufacturing methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1445079A CN1445079A (en) | 2003-10-01 |
| CN1189312C true CN1189312C (en) | 2005-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03121929 Expired - Fee Related CN1189312C (en) | 2003-04-18 | 2003-04-18 | Polyurethane enhancing flexible pipe and its manufacturing methods |
Country Status (1)
| Country | Link |
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| CN (1) | CN1189312C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240697B2 (en) * | 2014-08-22 | 2019-03-26 | 5elem Material Scientific(Jiangsu) Co., LTD. | Fracturing liquid delivery hose for recovery of shale oil and gas, and manufacturing method thereof |
| CN104405967A (en) * | 2014-10-11 | 2015-03-11 | 陆宋瑞 | Elastic telescopic braided pipe and production process thereof |
| CN104693778A (en) * | 2015-03-16 | 2015-06-10 | 池州九华汉高电工材料有限公司 | Anti-flaming PU (Polyurethane) hose |
| CN108908886A (en) * | 2018-06-29 | 2018-11-30 | 江苏爱索新材料科技有限公司 | Hose production technology is continuously coated inside and outside one kind |
| CN112460343A (en) * | 2020-10-30 | 2021-03-09 | 山东鲁尔胶管股份有限公司 | Steel wire braided hydraulic hose and preparation method thereof |
| CN113586815A (en) * | 2021-08-02 | 2021-11-02 | 淮南市天力达工矿配件有限公司 | Special high-pressure polyurethane hose for coal mine |
-
2003
- 2003-04-18 CN CN 03121929 patent/CN1189312C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1445079A (en) | 2003-10-01 |
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Owner name: WANG YINGUO Free format text: FORMER OWNER: WANG YINCHAO Effective date: 20140805 |
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Effective date of registration: 20140805 Address after: 053500 west head of Jing An street, Hebei, Jingxian County Patentee after: Wang Yinguo Address before: 053500 west head of Jing An street, Hebei, Jingxian County Patentee before: Wang Yinchao |
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