CN106989219B - Expansion rubber pipe and production process thereof - Google Patents
Expansion rubber pipe and production process thereof Download PDFInfo
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- CN106989219B CN106989219B CN201710281894.XA CN201710281894A CN106989219B CN 106989219 B CN106989219 B CN 106989219B CN 201710281894 A CN201710281894 A CN 201710281894A CN 106989219 B CN106989219 B CN 106989219B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
- F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
- F16L11/083—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire three or more layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses an expansion rubber tube and a production process thereof, wherein the expansion rubber tube comprises an inner tube cavity, an inner rubber layer is arranged outside the tube cavity, an inner reinforcing layer is arranged outside the inner rubber layer, and a rubber layer with the thickness of 0.25 mm is adhered on the inner reinforcing layer; the outer side of the inner reinforcing layer is an outer reinforcing layer, a layer of rubber layer with the thickness of 0.25 mm is compounded on the outer reinforcing layer, and the outer side of the outer reinforcing layer is an outer rubber pipe which comprises the following components: 36-40% of natural rubber, 13-15% of butadiene rubber, 5-8% of zinc oxide, 1-5% of anti-aging agent A, 1-5% of anti-aging agent D, 3-6% of coumarone, 15-25% of 220 carbon black, 15-20% of calcium bicarbonate, 2-4% of Vaseline, 1-2% of stearic acid, 0.3-0.5% of sulfur, 0.5-1% of accelerator NOBS and 0.1-0.2% of TMTD. The invention has high pressure-resistant coefficient, good heat insulation performance and soft pipe body, and is an ideal expansion rubber pipe.
Description
Technical Field
The invention relates to the technical field of expansion rubber pipes, in particular to an expansion rubber pipe and a production process thereof.
Background
In the oil transportation field of hydraulic systems, it is known that an expansion hose is often used for transporting hydraulic carriers, and most of hydraulic oil substances are in a high-temperature state during operation, and the expansion hose is required to have good expansion and bending properties, and meanwhile, the expansion hose should have high temperature resistance, high pressure resistance and good heat insulation.
Most of the expansion rubber pipes on the prior market are of metal net layer structures coated in rubber pipe bodies, and the expansion rubber pipes have certain strength and long service life, but have great defects, and are mainly characterized in that: 1. the existing expansion rubber tube has poor ductility and is not easy to bend, and when in actual use, if the expansion rubber tube is used in a narrow machine, the steel cloth in the expansion rubber tube is seriously deformed, and the service life of the expansion rubber tube is seriously influenced after long-time use; 2. the inside steel cloth layer skeleton that is of current inflation rubber tube supports, because of metal heat conductivility is good, when in actual use, to the transport of high temperature hydraulic oil, causes the ageing fracture of inflation rubber tube outer colloid easily, causes outside personnel to scald easily.
Aiming at the defects of the prior art, as a technical staff in the industry, it is very necessary to develop an expansion rubber pipe with a brand new structure, so as to thoroughly improve the defects of the prior art.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an expansion rubber pipe, which has the following structure:
the inner reinforcing layer adopts a polyester thread plate or a nylon thread plate, a rubber layer is adhered to one side surface of the inner reinforcing layer, and the thickness of the rubber layer is 0.5 mm; the outer side of the inner reinforcing layer is an outer reinforcing layer, and the outer reinforcing layer and the inner reinforcing layer have the same structure; the outer side of the outer reinforcing layer is provided with an outer rubber tube, and the outer rubber tube covers the whole outer reinforcing layer.
The polyester thread board adopts polyester D2 or polyester D3, and the nylon thread board adopts nylon 680 thread board.
The internal structure of the expansion rubber pipe consists of the following components in percentage by weight: 36-40% of natural rubber, 13-15% of butadiene rubber, 5-8% of zinc oxide, 1-5% of anti-aging agent A, 1-5% of anti-aging agent D, 3-6% of coumarone, 15-25% of 220 carbon black, 15-20% of calcium bicarbonate, 2-4% of Vaseline, 1-2% of stearic acid, 0.3-0.5% of sulfur, 0.5-1% of accelerator NOBS and 0.1-0.2% of TMTD, wherein the proportion of the components is 100%.
The production process of the expansion rubber pipe comprises the following steps of:
the production process of the expansion rubber pipe is summarized as the following steps of plasticating, mixing, extruding, calendaring, forming and vulcanizing, wherein the specific steps are as follows:
(1) After the above component materials are prepared, starting a cold water machine for hot water adjustment, preheating a roller to 70-80 ℃, starting a storage bin, adding natural rubber, and plasticating for 10-12 minutes;
(2) Mixing with butadiene rubber, zinc oxide, antioxidant A, antioxidant D and coumarone for 3-4 min under a ram pressure of 8kg/CM 2 The temperature of the rubber roller is 110-120 ℃;
(3) Adding 220 carbon black, calcium bicarbonate, vaseline and stearic acid, mixing for 3-4 min, and pressing with plug pressure of 8kg/CM 2 The temperature of the rubber roller is 110-120 ℃;
(4) Adding sulfur, an accelerator NOBS and TMTD, mixing the materials, slicing the mixture after the mixture is uniformly mixed, wherein the slice size is 14 cm long, 14 cm wide and 1 cm thick for later use;
(5) Preheating a machine body of a pipe blank extruder, adjusting the size of an inner pipe blank when the temperature of the machine body reaches 20-40 ℃ and the temperature of a machine head reaches 60-75 ℃, checking the extruded inner pipe blank, cooling the pipe blank by a water tank, and then, putting the pipe blank on a material tray, keeping the pipe blank in a dust-free state and in a shade state for not less than 4 hours, and cutting the pipe blank to a required length for later use;
(6) Moving to an air compressor, smearing a release agent on the outer side of the inner adhesive layer, wherein the release agent is commonly used plastic release agent in the market, inserting one end of a tube core into a tube blank, filling compressed air into the other end of the tube core to enable the two ends of the tube core to bulge, and sleeving the tube core into the tube blank integrally;
(7) Winding an inner reinforcing layer: selecting a polyester yarn plate or a nylon yarn plate with proper thickness, cutting the polyester yarn plate or the nylon yarn plate to a required width, winding the yarn plate on a pipe blank in a right-handed mode on a winding machine, compacting the winding, flattening and free of wrinkles, fastening the yarn plate with adhesive tape after the outer diameter is measured to be qualified, loosening the yarn plate, and screwing a rubber layer with the thickness of 0.5 mm on the pipe blank in a right-handed mode, wherein the winding is compacting, flattening and free of wrinkles and free of gaps; winding an outer reinforcing layer: winding a polyester yarn plate or a nylon yarn plate with proper thickness on the rubber layer in a left-hand way, compacting, flattening and wrinkle-free mode, and fastening by using an adhesive tape after the outer diameter is measured to be qualified, so that loosening is avoided;
(8) Winding the rubber sheet obtained in the step (4) on an outer reinforcing layer to form an outer rubber tube, wherein no overlapping phenomenon exists when the rubber sheet is paved, winding is required to be compact, leveling and no folds, after the outer diameter is measured, pasting a vulcanized strip with a label on the outer rubber tube, winding soaked water cloth on the outer side of the outer rubber tube, adjusting the included angle between a water cloth shaft and the shaft center of the rubber tube to enable the wound water cloth to coincide with the central line, tightly wrapping the outer rubber tube, arranging the rubber tube wound with the water cloth on a vulcanizing vehicle, feeding the rubber tube into a vulcanizing tank, closing the tank body, feeding steam into the tank body, setting the steam temperature to be 148-152 ℃, setting the pressure to be 0.4-0.45 Mpa, setting the vulcanizing time to be 55 minutes, setting condensate water once every ten minutes, releasing and removing the water cloth after vulcanization, pulling out the tube core to form a tube cavity, and setting the pulling-out speed of the tube core to be 4 m/s;
(9) Removing two ends of the expansion rubber tube obtained in the step (8), thereby completing the production of the invention;
the beneficial effects of the invention are as follows: the expansion rubber pipe obtained by the proportion and the process has high pressure resistance coefficient, the wire plates of the inner reinforcing layer and the outer reinforcing layer replace the metal net structure of the existing product, the internal strength of the expansion rubber pipe is effectively improved by double-layer reinforcement, the nonmetal material has good heat insulation performance, the pipe body is soft, the expansion rubber pipe is suitable for diversion of various hydraulic oil and high-temperature oil bodies, the high-temperature resistance is enhanced, the damage rate is effectively reduced, and the expansion rubber pipe is an ideal expansion rubber pipe.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic cross-sectional structure of a product of the present invention;
FIG. 2 is a schematic view of the partial structure of the A-direction in FIG. 1;
in the figure, 1, an outer rubber tube, 2, an outer reinforcing layer, 21, a rubber layer, 3, an inner reinforcing layer, 4, an inner rubber layer, 5 and a tube cavity.
Detailed Description
By the explanation of the steps, the invention further provides the embodiments, so that the process characteristics and advantages of the invention are more obvious.
Example 1:
raw materials are taken and compounded, 50 kg of ingredients are used for compounding, natural rubber 35%, butadiene rubber 13%, zinc oxide 5%, an anti-aging agent A2%, an anti-aging agent D2%, coumarone 4%,220 carbon black 20%, calcium bicarbonate 15%, vaseline 2%, stearic acid 1%, sulfur 0.4%, an accelerator NOBS 0.5% and TMTD 0.1% are mixed, and a mixture is obtained.
The preparation method of the expansion rubber pipe comprises the following steps:
the production process of the expansion rubber pipe is summarized as the following steps of plasticating, mixing, extruding, calendaring, forming and vulcanizing, wherein the specific steps are as follows:
(1) After the above component materials are prepared, starting a cold water machine for hot water adjustment, preheating a roller to 75 ℃, starting a storage bin, adding natural rubber, and plasticating for 10 minutes;
(2) Mixing with butadiene rubber, zinc oxide, antioxidant A, antioxidant D and coumarone for 3 min under a ram pressure of 8kg/CM 2 The temperature of the rubber roller is 110 ℃;
(3) Adding 220 carbon black, calcium bicarbonate, vaseline and stearic acid, mixing for 3 min, and pressing with plug pressure of 8kg/CM 2 The temperature of the rubber roller is 110 ℃;
(4) Adding sulfur, an accelerator NOBS and TMTD, mixing the materials, slicing the mixture after the mixture is uniformly mixed, wherein the slice size is 14 cm long, 14 cm wide and 1 cm thick for later use;
(5) Preheating a machine body of a pipe blank extruder, adjusting the size of an inner pipe blank when the temperature of the machine body reaches 30 ℃ and the temperature of a machine head reaches 75 ℃, checking the extruded inner glue pipe blank, cooling the inner glue pipe blank in a water tank, and then, putting the inner glue pipe blank on a material tray, keeping the dust-free and cool standing time for not less than 4 hours, and cutting the required length for later use;
(6) Moving to an air compressor, smearing a release agent on the outer side of the inner adhesive layer, wherein the release agent is commonly used plastic release agent in the market, inserting one end of a tube core into a tube blank, filling compressed air into the other end of the tube core to enable the two ends of the tube core to bulge, and sleeving the tube core into the tube blank integrally;
(7) Winding an inner reinforcing layer: selecting a terylene D2 wire plate, cutting the wire plate to a required width, winding the wire plate on a pipe blank in a right-hand manner on a winding machine, compacting the winding, flattening and free of wrinkles, fastening the wire plate with an adhesive tape after the outer diameter is measured to be qualified, and not loosening the wire plate, and screwing a layer of rubber layer with the thickness of 0.5 mm on the pipe blank in the right-hand manner, wherein the winding is compacting, flattening and free of wrinkles and gaps; winding an outer reinforcing layer: the polyester D2 is wound on the rubber layer in a left-hand manner, the winding is required to be compact, flat and wrinkle-free, and the rubber is fastened by the adhesive tape after the outer diameter is measured to be qualified, so that the rubber cannot be loosened;
(8) Winding the rubber sheet obtained in the step (4) on an outer reinforcing layer to form an outer rubber tube, wherein no overlapping phenomenon exists when the rubber sheet is paved, winding is required to be compact, leveling and no folds, after the outer diameter is measured, pasting a vulcanized strip with a label on the outer rubber tube, winding soaked water cloth on the outer side of the outer rubber tube, adjusting the included angle between a water cloth shaft and the shaft center of the rubber tube to enable the wound water cloth to coincide with a central line, tightly wrapping the outer rubber tube, arranging the rubber tube wound with the water cloth on a vulcanizing vehicle, feeding the rubber tube into a vulcanizing tank, closing the tank body, feeding steam into the tank body, discharging condensate water every ten minutes during vulcanizing, releasing pressure after vulcanization is finished, pulling out the tube core to form a tube cavity, and enabling the pulling-out speed of the tube core to be 4 m/s;
(9) Removing two ends of the expansion rubber tube obtained in the step (8), thereby completing the production of the invention;
example 2:
the components and the proportions are adopted, 50 kg of ingredients are used for compounding, the natural rubber is 38%, the butadiene rubber is 14%, the zinc oxide is 7%, the anti-aging agent A2%, the anti-aging agent D2%, the coumarone is 3%, the 220 carbon black is 15%, the calcium bicarbonate is 15%, the vaseline is 2%, the stearic acid is 1%, the sulfur is 0.3%, the accelerator NOBS is 0.6%, and the TMTD is 0.1%, and the proportions of the components are 100%.
The production process of the expansion rubber pipe comprises the following steps of:
the production process of the expansion rubber pipe is summarized as the following steps of plasticating, mixing, extruding, calendaring, forming and vulcanizing, wherein the specific steps are as follows:
(1) After the above component materials are prepared, starting a cold water machine for hot water adjustment, preheating a roller to 80 ℃, starting a storage bin, adding natural rubber, and plasticating for 10 minutes;
(2) Mixing with butadiene rubber, zinc oxide, antioxidant A, antioxidant D and coumarone for 3 min under a ram pressure of 8kg/CM 2 The temperature of the rubber roller is 115 ℃;
(3) Adding 220 carbon black, calcium bicarbonate, vaseline and stearic acid, mixing for 3-4 min, and pressing with plug pressure of 8kg/CM 2 The temperature of the rubber roller is 110-120 ℃;
(4) Adding sulfur, an accelerator NOBS and TMTD, mixing the materials, slicing the mixture after the mixture is uniformly mixed, wherein the slice size is 14 cm long, 14 cm wide and 1 cm thick for later use;
(5) Preheating a machine body of a pipe blank extruder, adjusting the size of an inner pipe blank when the temperature of the machine body reaches 40 ℃ and the temperature of a machine head reaches 75 ℃, checking the extruded inner pipe blank, cooling the pipe blank in a water tank, and then, placing the pipe blank on a material tray, keeping the pipe blank in a dust-free state, keeping the pipe blank in a cool state for not less than 4 hours, and cutting the pipe blank to a required length for later use;
(6) Moving to an air compressor, smearing a release agent on the outer side of the inner adhesive layer, wherein the release agent is commonly used plastic release agent in the market, inserting one end of a tube core into a tube blank, filling compressed air into the other end of the tube core to enable the two ends of the tube core to bulge, and sleeving the tube core into the tube blank integrally;
(7) Winding an inner reinforcing layer: selecting a nylon 680 wire plate, cutting the wire plate to a required width, winding the wire plate on a pipe blank in a right-handed manner on a winding machine, compacting the winding, flattening the wire plate without wrinkles, fastening the wire plate with an adhesive tape after the outer diameter is measured to be qualified, loosening the wire plate, and screwing a rubber layer with the thickness of 0.5 mm on the pipe blank in a right-handed manner, wherein the winding is compacting, flattening the wire plate without wrinkles and gaps; winding an outer reinforcing layer: on the rubber layer, winding a nylon 680 wire board in a left-hand manner, wherein the winding is required to be compact, smooth and wrinkle-free, and the nylon 680 wire board is fastened by an adhesive tape after the outer diameter is measured to be qualified and cannot be loosened;
(8) Winding the rubber sheet obtained in the step (4) on an outer reinforcing layer to form an outer rubber tube, wherein no overlapping phenomenon exists when the rubber sheet is paved, winding is required to be compact, leveling and no folds, after the outer diameter is measured, pasting a vulcanized strip with a label on the outer rubber tube, winding soaked water cloth on the outer side of the outer rubber tube, adjusting the included angle between a water cloth shaft and the shaft center of the rubber tube to enable the wound water cloth to coincide with a central line, tightly wrapping the outer rubber tube, arranging the rubber tube wound with the water cloth on a vulcanizing vehicle, feeding the rubber tube into a vulcanizing tank, closing the tank body, feeding steam into the tank body, discharging condensate water every ten minutes during vulcanizing, releasing pressure after vulcanizing is finished, pulling out the tube core to form a tube cavity, and pulling out the tube core at a pulling-out speed of 4 m/s;
(9) Removing two ends of the expansion rubber tube obtained in the step (8), thereby completing the production of the invention;
by comparing the two cases, the expansion rubber pipe obtained in the scheme 2 is superior to the rubber pipe obtained in the scheme 1 in test data.
The foregoing is to be considered as illustrative embodiments of the present invention and is not to be construed as limiting the scope of the invention in any way, since modifications to the invention will be apparent to those skilled in the art upon reading the foregoing disclosure.
Claims (2)
1. The production process of the expansion rubber pipe comprises an inner pipe cavity, wherein an inner rubber layer is arranged outside the pipe cavity, an inner reinforcing layer is arranged outside the inner rubber layer, the inner reinforcing layer is a polyester thread plate or a nylon thread plate, a rubber layer is adhered to one side surface of the inner reinforcing layer, the thickness of the rubber layer is 0.25 millimeter, and the rubber layer is arranged towards the outer side; the outer side of the inner reinforcing layer is an outer reinforcing layer, the outer reinforcing layer and the inner reinforcing layer have the same structure, a rubber layer with the thickness of 0.25 mm is compounded on the wire board, and the rubber layer is arranged inwards; the outer side of the outer reinforcing layer is provided with an outer rubber tube, and the outer rubber tube covers the whole outer reinforcing layer;
the method is characterized in that: the production process of the expansion rubber pipe comprises the following steps:
the production process of the expansion rubber pipe is summarized as the following steps of plasticating, mixing, extruding, calendaring, forming and vulcanizing, wherein the specific steps are as follows:
the internal structure of the expansion rubber pipe consists of the following components in percentage by weight: 36-40% of natural rubber, 13-15% of butadiene rubber, 5-8% of zinc oxide, 1-5% of anti-aging agent A, 1-5% of anti-aging agent D, 3-6% of coumarone, 15-25% of 220 carbon black, 15-20% of calcium bicarbonate, 2-4% of Vaseline, 1-2% of stearic acid, 0.3-0.5% of sulfur, 0.5-1% of accelerator NOBS and 0.1-0.2% of TMTD, wherein the proportion of the components is 100%;
(1) After the above component materials are prepared, starting a cold water machine for hot water adjustment, preheating a roller to 70-80 ℃, starting a storage bin, adding natural rubber, and plasticating for 10-12 minutes;
(2) Mixing with butadiene rubber, zinc oxide, antioxidant A, antioxidant D and coumarone for 3-4 min under a ram pressure of 8kg/CM 2 The temperature of the rubber roller is 110-120 ℃;
(3) Adding 220 carbon black, calcium bicarbonate, vaseline and stearic acid, mixing for 3-4 min, and pressing with plug pressure of 8kg/CM 2 The temperature of the rubber roller is 110-120 ℃;
(4) Adding sulfur, an accelerator NOBS and TMTD, mixing the materials, slicing the mixture after the mixture is uniformly mixed, wherein the slice size is 14 cm long, 14 cm wide and 1 cm thick for later use;
(5) Preheating a machine body of a pipe blank extruder, adjusting the size of an inner pipe blank when the temperature of the machine body reaches 20-40 ℃ and the temperature of a machine head reaches 60-75 ℃, checking the extruded inner pipe blank, cooling the pipe blank by a water tank, and then, putting the pipe blank on a material tray, keeping the pipe blank in a dust-free state and in a shade state for not less than 4 hours, and cutting the pipe blank to a required length for later use;
(6) Moving to an air compressor, smearing a release agent on the outer side of the inner adhesive layer, wherein the release agent is commonly used plastic release agent in the market, inserting one end of a tube core into a tube blank, filling compressed air into the other end of the tube core to enable the two ends of the tube core to bulge, and sleeving the tube core into the tube blank integrally;
(7) Winding an inner reinforcing layer: selecting a polyester yarn plate or a nylon yarn plate with proper thickness, cutting the polyester yarn plate or the nylon yarn plate to a required width, winding the yarn plate on a pipe blank in a right-handed mode on a winding machine, compacting the winding, flattening and free of wrinkles, fastening the yarn plate with adhesive tape after the outer diameter is measured to be qualified, loosening the yarn plate, and screwing a rubber layer with the thickness of 0.5 mm on the pipe blank in a right-handed mode, wherein the winding is compacting, flattening and free of wrinkles and free of gaps; winding an outer reinforcing layer: winding a polyester yarn plate or a nylon yarn plate with proper thickness on the rubber layer in a left-hand way, compacting, flattening and wrinkle-free mode, and fastening by using an adhesive tape after the outer diameter is measured to be qualified, so that loosening is avoided;
(8) Winding the rubber sheet obtained in the step (4) on an outer reinforcing layer to form an outer rubber tube, wherein no overlapping phenomenon exists when the rubber sheet is paved, winding is required to be compact, leveling and no folds, after the outer diameter is measured, pasting a vulcanized strip with a label on the outer rubber tube, winding soaked water cloth on the outer side of the outer rubber tube, adjusting the included angle between a water cloth shaft and the shaft center of the rubber tube to enable the wound water cloth to coincide with the central line, tightly wrapping the outer rubber tube, arranging the rubber tube wound with the water cloth on a vulcanizing vehicle, feeding the rubber tube into a vulcanizing tank, closing the tank body, feeding steam into the tank body, setting the steam temperature to be 148-152 ℃, setting the pressure to be 0.4-0.45 Mpa, setting the vulcanizing time to be 55 minutes, setting condensate water once every ten minutes, releasing and removing the water cloth after vulcanization, pulling out the tube core to form a tube cavity, and setting the pulling-out speed of the tube core to be 4 m/s;
(9) And (3) removing two ends of the expanded rubber tube obtained in the step (8) to finish the production of the invention.
2. A process for producing an expanded hose according to claim 1, wherein: the polyester thread board in the expansion rubber pipe adopts polyester D2 or polyester D3, and the nylon thread board adopts nylon 680 thread board.
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| CN201710281894.XA CN106989219B (en) | 2017-04-23 | 2017-04-23 | Expansion rubber pipe and production process thereof |
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