CN110079027B - Preparation method of cable outer sheath - Google Patents
Preparation method of cable outer sheath Download PDFInfo
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- CN110079027B CN110079027B CN201910430817.5A CN201910430817A CN110079027B CN 110079027 B CN110079027 B CN 110079027B CN 201910430817 A CN201910430817 A CN 201910430817A CN 110079027 B CN110079027 B CN 110079027B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
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- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- 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
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a preparation method of an outer sheath of a cable, which comprises 100 parts of chlorosulfonated polyethylene, 5 parts of zinc oxide, 20 parts of active magnesium oxide, 2 parts of an anti-aging agent A, 20 parts of titanium dioxide, 50 parts of calcium carbonate, 8 parts of an accelerator DPTT type, 2 parts of a photo-thermal stabilizer, 3 parts of pentaerythritol and a proper amount of a coloring agent, wherein the raw materials are mixed for rubber mixing, cooled and filtered after rubber mixing, and a tablet press is used for rolling pages after filtering. According to the invention, the movable groove is internally provided with the plugging head, the two ends of the plugging head are respectively provided with the first material receiving hole and the second material receiving hole, in the using process, the first material receiving hole and the second material receiving hole on the plugging head are used for intermittently communicating between the feed hopper and the first blanking port and the second blanking port, the first material receiving hole and the second material receiving hole are continuously used for containing, conveying and throwing the added raw materials into the internal mixer, the airtightness of the internal mixer is always kept in the feeding process, and the using effect of the internal mixer is improved.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a preparation method of a cable outer sheath.
Background
Along with the development of scientific technology in China, ship equipment also changes with the change of turning over the sky and covering the land, the ship equipment is applied to military equipment greatly, a large number of ships are required in a vast sea area in China to resist external aggression, the ships need to enter a harbor after going out of the sea and returning to the base for maintenance, a special magnetic measuring cable and a special demagnetizing cable are required for magnetic measurement and demagnetization, and the ships are required to have certain protection functions on the cable because the magnetic measuring equipment and the demagnetizing equipment are far away from an operation field and have large fall sometimes, the ultraviolet ray and seawater corrosion in south China are strong, so that the ships are required to have certain protection functions on the cable, the ships are obviously difficult to realize under the condition, and on the other hand, the cable which is required to be filtered needs to have the ultraviolet ray resistance function and the seawater corrosion resistance function, so that the material of an outer sheath of the cable needs to have certain ultraviolet ray resistance function and seawater corrosion resistance function, there has not been a cable jacket having such excellent properties so far.
The internal rubber mixer is a machine which is provided with a pair of rotors with specific shapes and rotating relatively and used for plasticating and mixing polymer materials in a clearance manner under the closed state of adjustable temperature and pressure, and mainly comprises an internal mixing chamber, the rotors, a rotor sealing device, a feeding and pressing device, a discharging device, a transmission device, a machine base and the like.
At present, the conventional internal mixer is used for plasticating and mixing rubber, the raw materials are added in sequence, and in the process of frequently adding the raw materials for multiple times, the position of a feed inlet is communicated with the outside air, so that the internal mixer cannot be always kept in a closed state in the process of adding materials, and the rubber mixing efficiency and the rubber mixing effect are influenced.
Disclosure of Invention
The invention aims to provide a preparation method of a cable outer sheath, which aims to solve the problems that the existing cable outer sheath proposed in the background technology cannot have the ultraviolet resistance function and the seawater corrosion resistance function at the same time, and the airtightness is poor in the rubber mixing process by using an internal mixer.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a cable outer sheath comprises the following raw materials in parts by weight:
100 parts of chlorosulfonated polyethylene;
5 parts of zinc oxide;
20 parts of active magnesium oxide;
2 parts of an anti-aging agent A;
20 parts of titanium dioxide;
50 parts of calcium carbonate;
8 parts of accelerator DPTT;
2 parts of a photo-thermal stabilizer;
3 parts of pentaerythritol;
1 part of colorant.
The preparation method of the cable outer sheath comprises the following steps:
(1): firstly, chlorosulfonated polyethylene, zinc oxide, active magnesium oxide, an anti-aging agent A type, titanium dioxide, calcium carbonate and an accelerator DPTT type are added into an internal mixer to be uniformly turned, then a light-heat stabilizer is added into the internal mixer to be uniformly turned, pentaerythritol and a coloring agent are added into the internal mixer for the third time, the processing temperature of the internal mixer is controlled below 130 ℃, the processed rubber is turned and cooled on a tablet press after being discharged, the turning machine is cooled repeatedly for at least 3 times, and the rubber is filtered after the materials are uniformly turned and cooled to prevent the occurrence of crosslinking in advance;
(2): when filtering the glue, the filter screen is 3 layers, the inner layer and the outer layer are 50 meshes, the middle layer is 120 meshes, the temperature of the machine body and the screw is heated to 80 +/-5 ℃ before the machine body and the screw are started, then the glue filtering can be started, and the temperature of the machine body and the screw is controlled within 120 +/-5 ℃ in the glue filtering process so as to avoid damaging equipment and preventing the glue from being crosslinked in advance;
(3): after the rubber is filtered, carrying out secondary rubber mixing, wherein the temperature of an internal mixer of the mixed rubber is controlled to be 120 +/-5 ℃ during the secondary rubber mixing, and if the temperature of the internal mixer is too high, the internal mixer is processed after being cooled, so that the rubber material is prevented from being crosslinked in advance;
(4): after the mixed rubber of the over-accelerator and the pentaerythritol is added and discharged, the mixed rubber is cooled on a tablet press, a material turning machine is reciprocated for a plurality of times, after the materials are fully cooled, the materials are rolled, the width of the rolled sheet is 300mm-500mm, and the thickness of the rolled sheet is 1.2-1.5 mm;
(5): mooney viscosity of the rubber compound processed for the second time is 55 +/-5, and the processed rubber compound is clearly marked so as to avoid using the rubber compound by the next procedure;
(6): the amount of the rubber compound processed for the second time is determined according to production requirements, the standing time is not more than 15 days in summer, not more than 30 days in winter, not more than 20 days in other seasons, and the rubber compound can be used after being processed again after exceeding the standing time.
The internal mixer used in the step (1) has the following structure:
the device comprises a feeding hopper, a plugging head, a cover body and an internal mixer body, wherein the top of the internal mixer body is provided with the cover body, a sealing gasket is arranged between the cover body and the internal mixer body, a movable groove is arranged at the middle position inside the cover body, two ends inside the movable groove are both provided with air pressure sensors, the top of the cover body at the position of the movable groove is provided with the feeding hopper, the bottom end of the feeding hopper is communicated with the movable groove, the bottom of the cover body at the position of one end of the movable groove is provided with a first blanking port, the bottom of the cover body at the position of the other end of the movable groove is provided with a second blanking port, the tops of the cover body at the positions right above the second blanking port and the first blanking port are both provided with air pushing cylinders vertical to the cover body, the internal part of each air pushing cylinder is provided with a first air pushing cavity, and the outer side wall of the air pushing cylinder at the position of the top inside the first air pushing cavity is connected with a first air duct, the inner part of the first air pushing cavity is provided with a movable rod, the bottom end of the movable rod is provided with a piston matched with the first air pushing cavity, a reset spring is arranged between the piston and the top end of the inner part of the first air pushing cavity, the top end of the movable rod penetrates through an air pushing cylinder and is provided with a fixed block, an extrusion rod is arranged at the middle position of the bottom of the piston, the bottom end of the extrusion rod is provided with an extrusion block matched with a blanking port, the inner parts of the cover bodies at the sides, close to each other, of the second blanking port and the first blanking port are provided with clamping grooves, clamping blocks are arranged inside the clamping grooves, the bottoms of the clamping blocks are provided with connecting blocks, the clamping blocks are made of iron materials, the inner parts of the movable grooves are provided with plugging heads, one ends of the plugging heads are provided with first material receiving holes, the other ends of the plugging heads are provided with second material receiving holes, and the inner parts of the plugging heads at the sides, close to each other, of the second material receiving holes and the first material receiving holes are provided with contraction grooves, sealing plates are inserted into the shrinking grooves in a penetrating mode, an extrusion spring is arranged between the sealing plates and the shrinking grooves, one ends of the sealing plates at the positions of the first material receiving hole and the second material receiving hole respectively extend into the first material receiving hole and the second material receiving hole, the bottoms of the sealing plates, far away from the ends of the shrinking grooves, far away from the shrinking grooves are provided with magnet blocks, the bottoms of the sealing plates, close to one sides of the shrinking grooves, of the magnet blocks are provided with limiting blocks, a second air pushing cavity is arranged inside the cover body on one side of the movable groove, a piston rod is arranged inside the second air pushing cavity, one end of the piston rod extends into the movable groove and is fixed with a blocking head, and one side of the outer side wall of the cover body is provided with a second air guide pipe communicated with the second air pushing cavity;
the length of the plugging head is smaller than the distance between the first blanking port and the second blanking port, and the length of the plugging head is larger than the distance between the first blanking port and the feeding hopper and the distance between the second blanking port and the feeding hopper.
Compared with the prior art, the invention has the beneficial effects that:
1: the chlorosulfonated polyethylene outer sheath has the functions of ozone resistance, ultraviolet resistance, high-temperature solarization resistance, corrosion resistance, water blocking and wear resistance, and prolongs the service life of the cable in seawater with strong ultraviolet rays and high corrosivity.
2: according to the invention, the movable groove is internally provided with the plugging head, the two ends of the plugging head are respectively provided with the first material receiving hole and the second material receiving hole, in the using process, the first material receiving hole and the second material receiving hole on the plugging head are used for intermittently communicating between the feed hopper and the first blanking port and the second blanking port, the first material receiving hole and the second material receiving hole are continuously used for containing, conveying and throwing the added raw materials into the internal mixer, the airtightness of the internal mixer is always kept in the feeding process, and the using effect of the internal mixer is improved.
3: in the invention, the top of the cover body right above the first blanking port and the second blanking port is provided with the air pushing cylinder, the inside of the air pushing cylinder is provided with the extrusion block matched with the blanking port, when the material receiving hole moves to the position of the blanking port and aligns with the blanking port in the process of throwing the material by using the material receiving hole, the air pressure inside the blocking head and the movable groove at one side of the blanking port reaches a certain value, the air pressure sensor transmits air pressure data to the external controller, the controller controls the external air pump to transmit air into the first air pushing cavity, so that the piston drives the extrusion block to descend, the materials in the blanking port and the blanking port are pushed and cleaned, the influence of material accumulation on feeding efficiency is avoided, a certain impact force is applied to the materials in the impact process, the materials are conveniently dispersed in the falling process, and the distribution uniformity in the material process is improved, increase reinforced effect, promote mixing efficiency.
Drawings
FIG. 1 is a schematic view of the internal structure of the cover of the internal mixer of the present invention;
FIG. 2 is an enlarged view of the interior of the plugging head of the present invention;
fig. 3 is an enlarged schematic view of the portion a of the present invention.
In the figure: 1. a first air-pushing cavity; 2. a movable rod; 3. a fixed block; 4. a movable groove; 5. a feed hopper; 6. an air pushing cylinder; 7. a return spring; 8. a piston; 9. an extrusion stem; 10. a second pneumatic chamber; 11. a piston rod; 12. a second air duct; 13. a gasket; 14. a first blanking port; 15. a plugging head; 16. a second blanking port; 17. extruding the block; 18. an air pressure sensor; 19. a cover body; 20. a magnet block; 21. a clamping block; 22. a card slot; 23. connecting blocks; 24. a contraction groove; 25. a limiting block; 26. a sealing plate; 27. a second receiving hole; 28. a first air duct; 29. a compression spring; 30. an internal mixer body; 31. a first receiving hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention is shown: a preparation method of a cable outer sheath comprises the following raw materials in parts by weight:
100 parts of chlorosulfonated polyethylene;
5 parts of zinc oxide;
20 parts of active magnesium oxide;
2 parts of an anti-aging agent A;
20 parts of titanium dioxide;
50 parts of calcium carbonate;
8 parts of accelerator DPTT;
2 parts of a photo-thermal stabilizer;
3 parts of pentaerythritol;
1 part of colorant.
The preparation method of the cable outer sheath comprises the following steps:
(1): firstly, chlorosulfonated polyethylene, zinc oxide, active magnesium oxide, an anti-aging agent A type, titanium dioxide, calcium carbonate and an accelerator DPTT type are added into an internal mixer to be uniformly turned, then a light-heat stabilizer is added into the internal mixer to be uniformly turned, pentaerythritol and a coloring agent are added into the internal mixer for the third time, the processing temperature of the internal mixer is controlled below 130 ℃, the processed rubber is turned and cooled on a tablet press after being discharged, the turning machine is cooled repeatedly for at least 3 times, and the rubber is filtered after the materials are uniformly turned and cooled to prevent the occurrence of crosslinking in advance;
(2): when filtering the glue, the filter screen is 3 layers, the inner layer and the outer layer are 50 meshes, the middle layer is 120 meshes, the temperature of the machine body and the screw is heated to 80 +/-5 ℃ before the machine body and the screw are started, then the glue filtering can be started, and the temperature of the machine body and the screw is controlled within 120 +/-5 ℃ in the glue filtering process so as to avoid damaging equipment and preventing the glue from being crosslinked in advance;
(3): after the rubber is filtered, carrying out secondary rubber mixing, wherein the temperature of an internal mixer of the mixed rubber is controlled to be 120 +/-5 ℃ during the secondary rubber mixing, and if the temperature of the internal mixer is too high, the internal mixer is processed after being cooled, so that the rubber material is prevented from being crosslinked in advance;
(4): after the mixed rubber of the over-accelerator and the pentaerythritol is added and discharged, the mixed rubber is cooled on a tablet press, a material turning machine is reciprocated for a plurality of times, after the materials are fully cooled, the materials are rolled, the width of the rolled sheet is 300mm-500mm, and the thickness of the rolled sheet is 1.2-1.5 mm;
(5): mooney viscosity of the rubber compound processed for the second time is 55 +/-5, and the processed rubber compound is clearly marked so as to avoid using the rubber compound by the next procedure;
(6): the amount of the rubber compound processed for the second time is determined according to production requirements, the standing time is not more than 15 days in summer, not more than 30 days in winter, not more than 20 days in other seasons, and the rubber compound can be used after being processed again after exceeding the standing time.
The internal mixer used in the step (1) has the following structure:
comprises a feed hopper 5, a blocking head 15, a cover body 19 and an internal mixer body 30, wherein the top of the internal mixer body 30 is provided with the cover body 19, a sealing gasket 13 is arranged between the cover body 19 and the internal mixer body 30, a movable groove 4 is arranged at the middle position inside the cover body 19, two ends inside the movable groove 4 are both provided with an air pressure sensor 18, the top of the cover body 19 at the position of the movable groove 4 is provided with the feed hopper 5, the bottom end of the feed hopper 5 is communicated with the movable groove 4, the bottom of the cover body 19 at one end position of the movable groove 4 is provided with a first blanking port 14, the bottom of the cover body 19 at the other end position of the movable groove 4 is provided with a second blanking port 16, the top of the cover body 19 at the position right above the second blanking port 16 and the first blanking port 14 is provided with an air push cylinder 6 vertical to the cover body 19, the inside of the air push cylinder 6 is provided with a first air push cavity 1, the outer side wall of the air push cylinder 6 at the top end position inside the first air push cavity 1 is connected with a first air duct 28, a movable rod 2 is arranged in the first air pushing cavity 1, a piston 8 matched with the first air pushing cavity 1 is arranged at the bottom end of the movable rod 2, a reset spring 7 is arranged between the piston 8 and the top end of the inside of the first air pushing cavity 1, a fixing block 3 is arranged at the top end of the movable rod 2, an extrusion rod 9 is arranged at the middle position of the bottom of the piston 8, an extrusion block 17 matched with the blanking port is arranged at the bottom end of the extrusion rod 9, clamping grooves 22 are arranged in cover bodies 19 at the sides, close to the first blanking port 14, of the second blanking port 16, clamping blocks 21 are arranged in the clamping grooves 22, connecting blocks 23 are arranged at the bottoms of the clamping blocks 21, the clamping blocks 21 are made of iron, a plugging head 15 is arranged in the movable groove 4, the length of the plugging head 15 is smaller than the distance between the first blanking port 14 and the second blanking port 16, and the feeding hopper 5 is larger than the distance between the first blanking port 14 and the second blanking port 16, one end of the plugging head 15 is provided with a first material receiving hole 31, the other end of the plugging head 15 is provided with a second material receiving hole 27, the insides of the plugging head 15 at one side where the second material receiving hole 27 and the first material receiving hole 31 are close to each other are both provided with a contraction groove 24, the insides of the contraction grooves 24 are both inserted with sealing plates 26, an extrusion spring 29 is arranged between the sealing plates 26 and the contraction groove 24, one end of the sealing plate 26 at the positions of the first material receiving hole 31 and the second material receiving hole 27 respectively extends to the insides of the first material receiving hole 31 and the second material receiving hole 27, the bottoms of the sealing plates 26 at the ends far away from the contraction grooves 24 are both provided with magnet blocks 20, the bottoms of the sealing plates 26 at one side where the magnet blocks 20 are close to the contraction grooves 24 are provided with limit blocks 25, the inside of the cover body 19 at one side of the movable groove 4 is provided with a second air pushing cavity 10, the inside of the second air pushing cavity 10 is provided with a piston rod 11, one end of the piston rod 11 extends to the inside the movable groove 4 and is fixed with the plugging head 15, and one side of the outer side wall of the cover body 19 is provided with a second air duct 12 communicated with the second air pushing cavity 10.
The chlorosulfonated polyethylene prepared by the method has the following physical properties by inspection: the strength is 18.5Mpa, the elongation is 390 percent, the strength change rate after aging (135 ℃ multiplied by 7 d) is 4 percent, the elongation change rate is-5 percent, the strength change rate after weathering aging test is-6.5 percent, the elongation change rate is-7.1 percent, and the tear resistance is 11N/mm.
The working principle is as follows: when chlorosulfonated polyethylene needs to be mixed, a power supply is connected externally, an external air pump is used for connecting a first air guide pipe 28 and a second air guide pipe 12, a cover body 19 is opened, main raw materials needing to be mixed are added into an internal mixer body 30, the cover body 19 is closed and then mixed and stirred, when materials need to be added, the materials are put into a feed hopper 5, air enters or is pumped out of the interior of a second air pushing cavity 10 through the second air guide pipe 12, a piston rod 11 is forced to drive a plugging head 15 to move back and forth in the interior of a movable groove 4 in the process of changing the air in the interior of the second air pushing cavity 10, a second material receiving hole 27 is driven to move towards one side of a second blanking port 16 in the forward moving process of the plugging head 15, and when the second material receiving hole 27 moves to the position of the second blanking port 16, a magnet block 20 at the bottom of a sealing plate 26 attracts a clamping block 21 in the clamping groove 20, the clamping block 21 is lifted up under the action of magnetic force to block the limiting block 25, so as to limit the continuous forward movement of the sealing plate 26, the blocking head 15 is continuously moved forward to enable the bottom end of the second material receiving hole 27 to be communicated with the second blanking port 16, the material falls into the internal mixer body 30 through the second blanking port 16, at the moment, one end of the blocking head 15 extrudes the bottom end of the internal part of the movable groove 4, the numerical value generated in the internal part of the movable groove 4 after the second material receiving hole 27 is aligned with the second blanking port 16 is adjusted in advance by the air pressure sensor 18, when the second material receiving hole 27 is completely aligned with the second blanking port 16, the piston rod 11 is not moved forward any more, an external air pump is controlled to enter the first air pushing cavity 1 at the position right above the second blanking port 16 through the first air guide tube 28, the piston 8 and the extruding block 17 are descended, the second material receiving hole 27 and the second blanking port 16 are cleaned, and the piston 8 is reset under the action of the reset spring 7, when second connects material hole 27 to remove to second blanking mouth 16 position department, first material hole 31 aligns with the bottom of feeder hopper 5, carry out the splendid attire to the material, utilize second air duct 12 to bleed, make and block up head 15 and move backward, will be equipped with the first material hole 31 of receiving of material and carry to first blanking mouth 14 position department, and throw in to the inside of internal mixer body 30, and second material hole 27 is linked together with the bottom of feeder hopper 5 again this moment, the work of reciprocating cycle, then add the material under the circumstances that does not influence the leakproofness of internal mixer body 30.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (1)
1. A preparation method of a cable outer sheath comprises the following raw materials in parts by weight:
100 parts of chlorosulfonated polyethylene;
5 parts of zinc oxide;
20 parts of active magnesium oxide;
2 parts of an anti-aging agent A;
20 parts of titanium dioxide;
50 parts of calcium carbonate;
8 parts of accelerator DPTT;
2 parts of a photo-thermal stabilizer;
3 parts of pentaerythritol;
1 part of a coloring agent;
the preparation method of the cable outer sheath comprises the following steps:
(1): firstly, chlorosulfonated polyethylene, zinc oxide, active magnesium oxide, an anti-aging agent A type, titanium dioxide, calcium carbonate and an accelerator DPTT type are added into an internal mixer to be uniformly turned, then a light-heat stabilizer is added into the internal mixer to be uniformly turned, pentaerythritol and a coloring agent are added into the internal mixer for the third time, the processing temperature of the internal mixer is controlled below 130 ℃, the processed rubber is turned and cooled on a tablet press after being discharged, the turning machine is cooled repeatedly for at least 3 times, and the rubber is filtered after the materials are uniformly turned and cooled to prevent the occurrence of crosslinking in advance;
(2): when filtering the glue, the filter screen is 3 layers, the inner layer and the outer layer are 50 meshes, the middle layer is 120 meshes, the temperature of the machine body and the screw is heated to 80 +/-5 ℃ before the machine body and the screw are started, then the glue filtering can be started, and the temperature of the machine body and the screw is controlled within 120 +/-5 ℃ in the glue filtering process so as to avoid damaging equipment and preventing the glue from being crosslinked in advance;
(3): after the rubber is filtered, carrying out secondary rubber mixing, wherein the temperature of an internal mixer of the mixed rubber is controlled to be 120 +/-5 ℃ during the secondary rubber mixing, and if the temperature of the internal mixer is too high, the internal mixer is processed after being cooled, so that the rubber material is prevented from being crosslinked in advance;
(4): after the mixed rubber of the over-accelerator and the pentaerythritol is added and discharged, the mixed rubber is cooled on a tablet press, a material turning machine is reciprocated for a plurality of times, and after the materials are fully cooled, the materials are rolled, wherein the width of the rolled sheet is 300mm-500mm, and the thickness of the rolled sheet is 1.2-1.5 mm;
(5): mooney viscosity of the rubber compound processed for the second time is 55 +/-5, and the processed rubber compound is clearly marked so as to avoid using the rubber compound by the next procedure;
(6): the amount of the rubber compound processed for the second time is determined according to production requirements, the standing time is not more than 15 days in summer, not more than 30 days in winter, not more than 20 days in other seasons, and the rubber compound can be used after being processed again after exceeding the standing time;
the internal mixer used in the step (1) has the following structure:
including feeder hopper (5), choke plug (15), lid (19) and internal mixer body (30), the top of internal mixer body (30) is equipped with lid (19), be equipped with sealed pad (13) between lid (19) and internal mixer body (30), the inside intermediate position department of lid (19) is equipped with movable groove (4), the inside both ends of movable groove (4) all are equipped with baroceptor (18), lid (19) top of movable groove (4) position department is equipped with feeder hopper (5), and the bottom and the movable groove (4) of feeder hopper (5) are linked together, lid (19) bottom of movable groove (4) one end position department is equipped with first blanking mouth (14), lid (19) bottom of movable groove (4) other end position department is equipped with second blanking mouth (16), second blanking mouth (16) and lid (19) top of position department directly over first blanking mouth (14) all are equipped with lid (19) looks vertically gas The device comprises a pushing cylinder (6), wherein a first air pushing cavity (1) is arranged inside the air pushing cylinder (6), a first air duct (28) is connected to the outer side wall of the air pushing cylinder (6) at the top end position inside the first air pushing cavity (1), a movable rod (2) is arranged inside the first air pushing cavity (1), pistons (8) matched with the first air pushing cavity (1) are arranged at the bottom ends of the movable rods (2), a reset spring (7) is arranged between each piston (8) and the top end inside the first air pushing cavity (1), the top end of each movable rod (2) penetrates through the air pushing cylinder (6) and is provided with a fixed block (3), an extrusion rod (9) is arranged at the middle position of the bottom of each piston (8), an extrusion block (17) matched with a blanking port is arranged at the bottom end of each extrusion rod (9), a clamping groove (22) is arranged inside a cover body (19) at one side, which is close to the second blanking port (16) and the first blanking port (14), a clamping block (21) is arranged in the clamping groove (22), a connecting block (23) is arranged at the bottom of the clamping block (21), the clamping block (21) is made of an iron material, a plugging head (15) is arranged in the movable groove (4), a first material receiving hole (31) is arranged at one end of the plugging head (15), a second material receiving hole (27) is arranged at the other end of the plugging head (15), contraction grooves (24) are arranged in the plugging head (15) at one side, close to the first material receiving hole (31), of the second material receiving hole (27), sealing plates (26) are inserted in the contraction grooves (24), an extrusion spring (29) is arranged between the sealing plates (26) and the contraction grooves (24), one ends of the sealing plates (26) at the positions of the first material receiving hole (31) and the second material receiving hole (27) respectively extend into the first material receiving hole (31) and the second material receiving hole (27), the bottom of one end, far away from the contraction groove (24), of the sealing plate (26) is provided with a magnet block (20), the bottom of the sealing plate (26), close to one side of the contraction groove (24), of the magnet block (20) is provided with a limiting block (25), a second air pushing cavity (10) is arranged inside the cover body (19) on one side of the movable groove (4), a piston rod (11) is arranged inside the second air pushing cavity (10), one end of the piston rod (11) extends into the movable groove (4) and is fixed with the plugging head (15), and one side of the outer side wall of the cover body (19) is provided with a second air guide pipe (12) communicated with the second air pushing cavity (10);
the length of the plugging head (15) is smaller than the distance between the first blanking port (14) and the second blanking port (16), and the length of the plugging head (15) is larger than the distance between the first blanking port (14) and the second blanking port (16) and the feeding hopper (5).
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| CN110079027B true CN110079027B (en) | 2021-11-05 |
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