CN110790622A - Preparation method of flexible linear cutting rope - Google Patents
Preparation method of flexible linear cutting rope Download PDFInfo
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- CN110790622A CN110790622A CN201911171117.5A CN201911171117A CN110790622A CN 110790622 A CN110790622 A CN 110790622A CN 201911171117 A CN201911171117 A CN 201911171117A CN 110790622 A CN110790622 A CN 110790622A
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0041—Shaping the mixture by compression
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
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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
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- 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
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
-
- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
Abstract
The invention discloses a preparation method of a flexible linear cutting rope, which is characterized in that a casing of the cutting rope is prepared by vulcanizing and curing a two-component room temperature vulcanized silicone rubber by a vulcanizing agent, an explosive and the two-component room temperature vulcanized silicone rubber are filled in the casing and pressed into an energy-gathering groove, a cutting rope medicine strip with the energy-gathering groove is prepared by vulcanizing and curing the vulcanizing agent, then metal powder and the two-component room temperature vulcanized silicone rubber are mixed and filled in the energy-gathering groove of the cutting rope medicine strip, and the metal powder and the two-component room temperature vulcanized silicone rubber are pressed into an energy. The energy-gathering cover of the flexible linear cutting rope prepared by the invention not only has good flexibility, but also is tightly combined with the cutting rope medicine strip, so that the cutting rope has good toughness and bending performance, and the explosive cutting capability is enhanced.
Description
Technical Field
The invention belongs to the technical field of explosive cutting, relates to a linear energy-gathering cutting rope, and particularly relates to a preparation method of a flexible linear cutting rope with good flexibility and explosive cutting capacity.
Background
Explosive energy-gathering cutting is a special explosive cutting technology developed in the middle of the 20 th century. The high-speed linear jet is formed by crushing the energy-gathering cover by using the pressure formed by explosive explosion by adopting a forming energy-gathering charge technology, and various metal and non-metal materials can be cut in a short time.
In order to form a stable metal jet flow in the explosive cutting process of the cutting rope, the energy-gathering cover of the cutting rope is required to have the characteristics of high density, high sound speed and difficulty in gasification. Therefore, the existing conventional energy-gathering cutting rope mostly adopts red copper as an energy-gathering cover material.
In practical applications, it is often necessary to use linear shaped cutting cables to cut different shaped cuts, which requires that the cutting cables have certain bending properties. At present, flexible energy-gathering cutting cables are prepared from flexible metal materials such as pure aluminum, lead-antimony alloy, lead-zinc alloy and the like at home and abroad.
Royal et al (development of flexible cutting cable [ J ] mining technology, 2013, 13(05): 76-77.) prepare an energy-gathering cover with energy-gathering grooves and a cutting cable shell by a pure aluminum semicircular tube through drawing and rolling processes, and then fill explosives to prepare the flexible energy-gathering cutting cable. Huangyin et al (production of simple flexible cutting rope and explosion cutting metal plate test [ A ]. China society for civil blasting materials, sixth annual meeting of China society for civil blasting materials, proceedings [ C ]. China society for civil blasting materials, edition of magazine of blasting materials, 2004: 4.) adopt lead-antimony alloy to prepare the flexible cutting rope.
The process for manufacturing the cutting rope by using pure aluminum is complicated, the cutting capability is weak, and the wide application space of the cutting rope cannot be met. Although the lead material has good bending performance and high density, the lead material is easy to generate gasification phenomenon in the explosive cutting process, and the cutting capability of the lead material is influenced. Moreover, the flexible cutting cord made of such soft metals cannot be bent many times, or else a fracture phenomenon occurs.
Disclosure of Invention
The invention aims to provide a preparation method of a flexible linear cutting rope, which is used for preparing the flexible linear cutting rope which has good flexibility and explosive cutting capability and can be quickly bent into a required cutting shape in the using process through new process conditions and materials.
The flexible linear cutting cord is prepared according to the following preparation process.
The following components in percentage by weight are taken as raw materials: 87.5-92.5 wt% of bicomponent room temperature vulcanized silicone rubber, 2.8-8.5 wt% of vulcanizing agent ethyl orthosilicate, 1.26-4.84 wt% of plasticizer and 0.02-0.8 wt% of organic tin catalyst, mixing the raw materials to form a viscous mixture, pouring the viscous mixture into a mold for compression molding, and curing at normal temperature to obtain the U-shaped structure cutting cable shell.
According to the weight percentage content of 60-85 wt% of explosive powder, 13.5-36 wt% of double-component room temperature vulcanized silicone rubber, 0.9-2.4 wt% of vulcanizing agent ethyl orthosilicate, 0.49-1.3 wt% of plasticizer and 0.1-0.3 wt% of organic tin catalyst, the raw materials are mixed to form a viscous mixture, the viscous mixture is poured into a U-shaped cutting rope shell, a pressing plate with a protruding part on the surface is used for pressing and forming, the viscous mixture is cured at normal temperature to obtain a cutting rope drug strip filled in the cutting rope shell, and the surface of the cutting rope drug strip is extruded by the pressing plate with the protruding part to form an energy-gathering groove.
75-97 wt% of metal powder, 2.7-22.5 wt% of double-component room-temperature vulcanized silicone rubber, 0.18-1.5 wt% of vulcanizing agent ethyl orthosilicate, 0.1-0.8 wt% of plasticizer and 0.02-0.2 wt% of organic tin catalyst are mixed to form a viscous mixture, the viscous mixture is poured into an energy-gathering groove of a cutting rope medicine strip, a pressing plate with a protruding part on the surface is used for pressing and forming, and the energy-gathering cover with the shape of the energy-gathering groove is obtained by curing at normal temperature.
The energy gathering cover and the cutting rope shell form an integrated structure, the cutting rope medicine strips are sealed in a space formed by the cutting rope medicine strips, and the flexible linear cutting rope is prepared after demolding.
The two-component room temperature vulcanized silicone rubber is a common room temperature vulcanized silicone rubber, and the crude rubber is hydroxyl-terminated polydimethylsiloxane, which is called RTV-2 for short.
Furthermore, the metal powder is one of copper powder, tungsten powder or nickel powder, or a mixture of several of the copper powder, the tungsten powder or the nickel powder in any proportion. Copper powder, tungsten powder and nickel powder all have higher density, are difficult to gasify in the explosion process.
Preferably, the particle size of the metal powder used in the present invention is 25 to 75 μm.
The plasticizer can be titanate plasticizer or citrate plasticizer, including plasticizer such as acetyl tributyl citrate and dibutyl phthalate.
Further, the organic tin catalyst is dibutyltin dilaurate, dioctyltin dilaurate or the like.
Specifically, the pressing plate used in the present invention has a protruding portion on the surface thereof, and the protruding portion may be V-shaped or semicircular.
Further, when the protruding portion is V-shaped, the angle of the V-shape is 60 ° to 100 °.
In the preparation method, after the viscous mixture is pressed and formed, the curing time at normal temperature is preferably 0.5-8 h.
According to the invention, the explosive powder and the metal powder are bonded together through the adhesive, so that the cutting rope explosive strip and the energy-gathering cover both have good toughness, and the prepared flexible linear cutting rope with good flexibility and strong cutting capability can be quickly bent into a required cutting shape in the using process.
Drawings
FIG. 1 is a schematic cross-sectional view of a flexible linear cutting cord of the present invention.
FIG. 2 shows an assembly of 10mm wide circular flexible linear cutting cord and circular explosion cutting of 4mm thick steel plate.
FIG. 3 shows an assembly drawing of a 15mm wide circular flexible linear cutting cord and the result of circular explosion cutting of a 5mm thick steel plate.
Detailed Description
The following examples are only preferred embodiments of the present invention and are not intended to limit the present invention in any way. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The two-component room temperature vulcanized silicone rubber used in the embodiment of the invention is RTV-2 raw rubber produced by the research institute of chemical assistants for land in Panshi, model number SDL-1-41.
Example 1.
Weighing 9g of RTV-2, dropwise adding 0.60g of ethyl orthosilicate and 0.326g of acetyl tributyl citrate, uniformly stirring, continuously dropwise adding 0.074g of dibutyltin dilaurate, and uniformly stirring and mixing to form a viscous mixture.
Pouring the formed viscous mixture into a steel mold with length of 100mm, width of 10mm and depth of 13mm, pressing into U-shape, and curing at room temperature for 1h to obtain the shell of U-shaped cutting cable.
Weighing 15g of explosive RDX and 3.375g of RTV-2, uniformly mixing, then dropwise adding 0.225g of ethyl orthosilicate and 0.117g of acetyl tributyl citrate, uniformly stirring, continuously dropwise adding 0.027g of dibutyltin dilaurate, and uniformly stirring and mixing to form a viscous mixture.
And pouring the formed sticky mixture into a solidified cutting rope shell, pressing by using a pressing plate with a V-shaped protruding part with a cone angle of 60 degrees to form a V-shaped energy-gathering groove on the surface of the sticky mixture, and solidifying for 3 hours at normal temperature to obtain the cutting rope medicine strip with the V-shaped energy-gathering groove on the surface.
30g of copper powder with the particle size of 48-50 mu m and 21.42 g of RTV are weighed and added into a stirrer together, and the mixture is stirred for 5min at the rotating speed of 180r/min so as to be uniformly mixed.
0.095g of ethyl orthosilicate and 0.051g of acetyl tributyl citrate are dropwise added into the stirrer, stirring is continued for 5min, then 0.012g of dibutyltin dilaurate is dropwise added, and stirring is continued for 10min so as to be uniformly mixed to form a viscous mixture.
Pouring the formed sticky mixture into the V-shaped energy-gathering groove of the cutting rope medicine strip, continuously pressing by using the pressing plate with the V-shaped protruding part to form a V-shaped energy-gathering cover with the wall thickness of 1.5mm, curing for 2.5h, forming, taking down the pressing plate, taking out from the die, and preparing the flexible linear cutting rope with the cross-sectional structure shown in figure 1.
Example 2.
Weighing 12g of RTV-2, dropwise adding 0.65g of ethyl orthosilicate and 0.387g of acetyl tributyl citrate, uniformly stirring, continuously dropwise adding 0.086g of dibutyltin dilaurate, and uniformly stirring and mixing to form a viscous mixture.
Pouring the formed viscous mixture into a steel mold with length of 100mm, width of 10mm and depth of 13mm, pressing into U-shape, and curing at room temperature for 1h to obtain the shell of U-shaped cutting cable.
Weighing 17g of explosive RDX and 3.385g of RTV-2, uniformly mixing, then dropwise adding 0.233g of ethyl orthosilicate and 0.132g of acetyl tributyl citrate, uniformly stirring, continuously dropwise adding 0.032g of dibutyltin dilaurate, and uniformly stirring and mixing to form a viscous mixture.
And pouring the formed sticky mixture into a solidified cutting rope shell, pressing by using a pressing plate with a V-shaped protruding part with a cone angle of 60 degrees to form a V-shaped energy-gathering groove on the surface of the sticky mixture, and solidifying for 4 hours at normal temperature to obtain the cutting rope medicine strip with the V-shaped energy-gathering groove on the surface.
Weighing 40g of tungsten powder with the particle size of 48-50 mu m and 21.84 g of RTV, adding the tungsten powder and the RTV into a stirrer together, and stirring at the rotating speed of 180r/min for 5min to uniformly mix the tungsten powder and the RTV.
0.125g of ethyl orthosilicate and 0.082g of acetyl tributyl citrate are dripped into the stirrer, the stirring is continued for 5min, then 0.022g of dibutyltin dilaurate is dripped, the stirring is continued for 10min, and the materials are uniformly mixed to form a sticky mixture.
Pouring the formed sticky mixture into the V-shaped energy-gathering groove of the cutting rope medicine strip, continuously pressing by using the pressing plate with the V-shaped protruding part to form a V-shaped energy-gathering cover with the wall thickness of 1.6mm, curing for 2.5h, forming, taking down the pressing plate, taking out from the die, and preparing the flexible linear cutting rope with the cross-sectional structure shown in figure 1.
Example 3.
Weighing 49.50g of RTV-2, dropwise adding 3.264g of ethyl orthosilicate and 1.637g of acetyl tributyl citrate, uniformly stirring, continuously dropwise adding 0.374g of dibutyltin dilaurate, and uniformly stirring and mixing to form a viscous mixture.
Pouring the formed viscous mixture into steel mold with length of 500mm, width of 15mm and depth of 23mm, pressing into U-shape, and curing at room temperature for 1h to obtain the shell of U-shaped cutting cable.
160g of explosive RDX and 49.568g of RTV-2 are weighed, mixed uniformly, then 2.254g of ethyl orthosilicate and 1.873g of acetyl tributyl citrate are added dropwise, the mixture is stirred uniformly, 0.427g of dibutyltin dilaurate is continuously added dropwise, and the mixture is stirred and mixed uniformly to form a viscous mixture.
And pouring the formed sticky mixture into a solidified cutting rope shell, pressing by using a pressing plate with a V-shaped protruding part with a cone angle of 60 degrees to form a V-shaped energy-gathering groove on the surface of the sticky mixture, and solidifying for 4 hours at normal temperature to obtain the cutting rope medicine strip with the V-shaped energy-gathering groove on the surface.
Weighing 180g of copper powder with the particle size of 48-50 mu m and RTV-211.68 g, adding the copper powder and the RTV-211.68 g into a stirrer together, and stirring at the rotating speed of 180r/min for 5min to uniformly mix the copper powder and the RTV-211.68 g.
3.956g of ethyl orthosilicate and 1.165g of acetyl tributyl citrate are dropwise added into the stirrer, stirring is continued for 5min, then 0.194g of dibutyltin dilaurate is dropwise added, and stirring is continued for 10min so as to be uniformly mixed to form a viscous mixture.
Pouring the formed sticky mixture into the V-shaped energy-gathering groove of the cutting rope medicine strip, continuously pressing by using the pressing plate with the V-shaped protruding part to form a V-shaped energy-gathering cover with the wall thickness of 1.5mm, curing for 3.5h, forming, taking down the pressing plate, taking out from the die, and preparing the flexible linear cutting rope with the cross-sectional structure shown in figure 1.
Application example.
4 pieces of flexible linear cutting rope of 100mm × 10mm × 13mm in specification prepared in example 1 were assembled into an annular flexible linear cutting rope of an approximately circular structure shown in a in fig. 2 by restraining with a foam material, and an explosion cutting test was performed on a 4mm thick a3 steel plate with a zero gap in explosion height in a dedicated explosion hole laboratory.
2 pieces of the flexible linear cutting rope with the specification of 500mm multiplied by 15mm multiplied by 23mm prepared in the example 3 are taken, are restrained by an aluminum buckle device, are assembled into an annular flexible linear cutting rope with an approximate circular structure shown in the figure 3A, and an explosion cutting test is carried out on an A3 steel plate with the thickness of 5mm in a special explosion hole laboratory by taking the explosion height as zero clearance.
Test results show that when 4 flexible linear cutting cables with the thickness of 100mm multiplied by 10mm multiplied by 13mm are used for cutting a steel plate with the thickness of 4mm in an annular explosion mode, the steel plate is completely and annularly cut into two parts, and the steel blocks and the perforated steel plate which are annularly cut are shown in figure 2B; when a 5mm thick steel plate is ring-blast cut with 2 500mm by 15mm by 23mm flexible linear cutting cords, the steel plate is completely ring-cut into two parts, and the ring-cut steel block and the perforated steel plate are shown in fig. 3B. Test results prove that the flexible linear cutting cable has the capability of cutting a steel plate by annular explosion.
Claims (9)
1. A preparation method of a flexible linear cutting rope is characterized by comprising the following steps:
the following components in percentage by weight are taken as raw materials: 87.5-92.5 wt% of bicomponent room temperature vulcanized silicone rubber, 2.8-8.5 wt% of vulcanizing agent ethyl orthosilicate, 1.26-4.84 wt% of plasticizer and 0.02-0.8 wt% of organic tin catalyst, mixing the raw materials to form a viscous mixture, pouring the mixture into a mold for compression molding, and curing at normal temperature to obtain a U-shaped cutting cable shell;
according to the weight percentage content of 60-85 wt% of explosive powder, 13.5-36 wt% of double-component room temperature vulcanized silicone rubber, 0.9-2.4 wt% of vulcanizing agent ethyl orthosilicate, 0.49-1.3 wt% of plasticizer and 0.1-0.3 wt% of organic tin catalyst, mixing the raw materials to form a viscous mixture, pouring the viscous mixture into a U-shaped cutting rope shell, pressing and molding by using a pressing plate with a protruding part on the surface, curing at normal temperature to obtain a cutting rope drug strip filled in the cutting rope shell, and extruding the surface of the cutting rope drug strip by using the pressing plate with the protruding part to form an energy-gathering groove;
75-97 wt% of metal powder, 2.7-22.5 wt% of double-component room-temperature vulcanized silicone rubber, 0.18-1.5 wt% of vulcanizing agent ethyl orthosilicate, 0.1-0.8 wt% of plasticizer and 0.02-0.2 wt% of organic tin catalyst are mixed to form a sticky mixture, the sticky mixture is poured into an energy-gathering groove of a cutting rope medicine strip, a pressing plate with a protruding part on the surface is used for pressing and forming, and the sticky mixture is solidified at normal temperature to obtain an energy-gathering cover in the shape of the energy-gathering groove;
the energy gathering cover and the cutting rope shell form an integrated structure, the cutting rope medicine strips are sealed in a space formed by the cutting rope medicine strips, and the flexible linear cutting rope is prepared after demolding.
2. The method for preparing a flexible linear cutting rope according to claim 1, wherein the metal powder is one of copper powder, tungsten powder or nickel powder, or a mixture of several of the copper powder, the tungsten powder and the nickel powder in any proportion.
3. The method for preparing a flexible linear cutting cord according to claim 1 or 2, wherein the metal powder has a particle size of 25 to 75 μm.
4. A method of making a flexible linear cutting cord according to claim 1, wherein said plasticizer is a titanate-based or citrate-based plasticizer.
5. The method of claim 4, wherein the plasticizer is acetyl tributyl citrate or dibutyl phthalate.
6. The method for preparing a flexible linear cutting cord according to claim 1, wherein the organotin catalyst is dibutyltin dilaurate or dioctyltin dilaurate.
7. The method of claim 1, wherein the protruded portion of the pressing plate having the protruded portion on the surface thereof is V-shaped or semicircular.
8. The method for preparing a flexible linear cutting cord according to claim 7, wherein the V-shaped angle of the V-shaped protrusion is 60 to 100 °.
9. The method for preparing the flexible linear cutting rope according to claim 1, wherein the viscous mixture is pressed and molded and then cured for 0.5-8 hours at normal temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111923398A (en) * | 2020-08-07 | 2020-11-13 | 重庆工程职业技术学院 | Tubulation module and cutting cable processingequipment based on 3D prints thereof |
| CN111923400A (en) * | 2020-08-07 | 2020-11-13 | 重庆工程职业技术学院 | Cutting cable 3D printing process and device |
| CN113020302A (en) * | 2020-05-29 | 2021-06-25 | 重庆工程职业技术学院 | Energy-gathering cutting cable processing device |
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| CN106141319A (en) * | 2016-08-25 | 2016-11-23 | 南京理工大学 | A kind of portable rapid cutting device |
| CN107986925A (en) * | 2017-11-28 | 2018-05-04 | 中国工程物理研究院化工材料研究所 | A kind of high-energy-density reactivity elastomer and preparation method thereof |
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| JP2012224034A (en) * | 2011-04-21 | 2012-11-15 | Bridgestone Corp | Method of manufacturing belt for tire and pneumatic tire |
| CN106141319A (en) * | 2016-08-25 | 2016-11-23 | 南京理工大学 | A kind of portable rapid cutting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113020302A (en) * | 2020-05-29 | 2021-06-25 | 重庆工程职业技术学院 | Energy-gathering cutting cable processing device |
| CN111923398A (en) * | 2020-08-07 | 2020-11-13 | 重庆工程职业技术学院 | Tubulation module and cutting cable processingequipment based on 3D prints thereof |
| CN111923400A (en) * | 2020-08-07 | 2020-11-13 | 重庆工程职业技术学院 | Cutting cable 3D printing process and device |
| CN111923398B (en) * | 2020-08-07 | 2022-01-28 | 重庆工程职业技术学院 | Tubulation module and cutting cable processingequipment based on 3D prints thereof |
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