CN113004106B - Priming powder and firing cable for electroless cutting and preparation method thereof - Google Patents
Priming powder and firing cable for electroless cutting and preparation method thereof Download PDFInfo
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- CN113004106B CN113004106B CN202110510391.1A CN202110510391A CN113004106B CN 113004106 B CN113004106 B CN 113004106B CN 202110510391 A CN202110510391 A CN 202110510391A CN 113004106 B CN113004106 B CN 113004106B
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
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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
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/12—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds
Abstract
The invention discloses a primer for electroless cutting, which comprises the following components in parts by weight: 20-30 parts of Ti, 25-30 parts of Al and Fe3O420 to 27 parts of MnO26-10 parts of CaO, 10-15 parts of SiO27-10 parts. Based on the same inventive concept, the invention also provides a preparation method of the firing cable for electroless cutting, which comprises the following steps: preparing a binder; making into paste; spreading the first layer of cotton gauze on a workbench, and coating the paste medicament; uniformly rolling two to three times by using a wood roller with the diameter of about 50 mm; continuously smearing the pasty medicament on the second layer of cotton gauze; drying the firing cable blank made of the cotton gauze with at least four layers in the shade; after the firing cable blank is completely dried in the shade, the firing cable blank is cut into corresponding sizes to be used. The invention can be directly ignited by a common fire source, and further ignites the electroless cutting product to generate self-propagating reaction by the reaction of the ignition powder.
Description
Technical Field
The invention relates to the field of electroless cutting materials, in particular to a primer and a firing cable for electroless cutting and a preparation method thereof.
Background
The current common ignition means mainly comprise three types: (1) ignition is realized by high-temperature matches, namely magnesium alloy; (2) igniting through a lead of black powder; (3) ignited by the bridge wire.
However, the above three ignition means have the following disadvantages: the high-temperature matches are used for ignition, so that the product is greatly limited, and special magnesium alloy metal matches are required to be used; the lead of the black powder is used for ignition, and potential safety hazards exist in the used lead no matter production, transportation, storage, use and the like; the ignition of the bridge wire has requirements on a power supply, special equipment must be guaranteed during use, and the device is high in cost and inconvenient to operate.
The Chinese invention patent CN201010280127.5 discloses a novel potassium perchlorate paper firing line for firecrackers, wherein the firing powder in the paper firing line is prepared from potassium perchlorate, hemp stalk carbon and magnesium oxide in certain mass percentage; the manufacturing process comprises the following steps: firstly, uniformly mixing hemp stalk carbon and magnesium oxide by adopting a medicine mixer according to the mass percentage, and then uniformly mixing the hemp stalk carbon and the magnesium oxide together with potassium perchlorate to obtain ignition powder; secondly, twisting the priming powder in the first step with a priming machine and lead paper into a semi-finished paper priming wire, wherein the dosage of the priming powder is 0.8 jin to 1.2 jin of the priming powder per 1 kilometer of the lead paper; and thirdly, slurry leading is carried out on the semi-finished paper firing cable in the second step, air drying, cutting and tray pouring are carried out after slurry leading, and the finished paper firing cable is obtained. However, this wick is not suitable for underwater combustion.
The Chinese invention patent CN201911142389.2 discloses an underwater electroless cutting material, which is used for underwater cutting metal workpieces, the heat generated by the invention can locally melt the cut metal, and the high-speed metal jet generated by the reaction can act with water jointly to remove the molten metal, so as to achieve the purpose of underwater cutting. However, the non-electric cutting material is difficult to ignite, and the existing ignition means is more difficult to realize because the non-electric cutting material is not easy to burn in an underwater environment.
Therefore, the prior art needs to be solved.
Disclosure of Invention
The invention aims to provide a primer and a firing cable for electroless cutting and a preparation method thereof. The invention can be directly ignited by common ignition sources, such as a lighter, a match, cigarettes, incense and the like, and further ignites the electroless cutting product through the reaction of the ignition powder to cause the electroless cutting product to generate self-propagating reaction, thereby realizing the purpose of electroless cutting.
The technical scheme of the invention is realized as follows:
the primer for electroless cutting comprises the following components in parts by weight: 20-30 parts of Ti, 25-30 parts of Al and Fe3O420 to 27 parts of MnO26-10 parts of CaO, 10-15 parts of SiO27-10 parts. The priming powder in the invention accounts for 3-5 per mill of the electroless cutting material. The "electroless cutting material" refers to an electroless cutting material suitable for underwater use disclosed in chinese patent CN 201911142389.2. The priming powder of the invention mainly plays a role of ignitionWhile the "electroless cutting material" mainly plays a role of cutting, the two roles are different. The electroless cutting material contains high-heat agent, slagging agent, alloying agent and other components, and the design key point is that the energy generated by the reaction melts the wood, and the slagging agent and the oxide generated by the reaction form a complex multi-element slag system in the molten pool reaction, so that the crystallization temperature of the slag system is reduced, and the molten pool can keep fluidity in relative time; meanwhile, the alloying agent also participates in the reaction of the molten pool, improves the fluidity of the alloy, enables the alloying agent and the product to jointly form fluid high-temperature jet flow, and takes away metal at the cut of the parent metal to form a flush cut. The non-electric cutting agent has high ignition point, and can not be ignited in a short time by a fire source below 500 ℃. According to the formula of the technical scheme, firstly, the cotton gauze can be burnt by a common fire source, so that the Ti powder can be ignited, and the heat generated after the Ti powder is burnt is enough to initiate the self-propagating reaction of other components, and the heat generated by the common reaction of the ignition powder can ignite the medicament of the non-electric cutting material in a short time to assist in completing the non-electric cutting task.
As a preferable technical scheme, the priming powder comprises the following components in parts by weight: 25 parts of Ti, 26 parts of Al and Fe3O425 parts of MnO26 parts of CaO, 10 parts of CaO and SiO28 parts of the raw materials.
As a preferable technical scheme, the priming powder comprises the following components in parts by weight: 23 parts of Ti, 27 parts of Al and Fe3O420 parts of MnO210 parts of CaO, 11 parts of SiO29 parts.
As a preferable technical scheme, the priming powder comprises the following components in parts by weight: 20 parts of Ti, 29 parts of Al and Fe3O423 parts of MnO29 parts of CaO 12 parts of SiO27 parts.
The primer for electroless cutting has the advantages that the powder particle sizes of various components in the primer formula are-200 meshes to-100 meshes. Under the technical scheme, the components can be fully mixed, and the proper activity of the components can be ensured.
Based on the same inventive concept, the invention also provides a firing cable for electroless cutting, which comprises the firing cable.
Based on the same inventive concept, the invention also provides a preparation method of the firing cable for electroless cutting, which is prepared from the firing cable, ethanol, shellac sheet and cotton gauze.
The preparation method of the firing cable for electroless cutting specifically comprises the following steps:
(1) mixing the shellac sheet and ethanol according to a mass ratio of 1: 5, standing for at least 3 hours, keeping the temperature of 25 ℃, and fully stirring once every 20 minutes to prepare the binder; the mass ratio of the shellac to the ethanol is more than 1: 5, the shellac is too much, and the response time is long when the shellac is ignited; the mass ratio of the shellac to the ethanol is less than 1: 5, the shellac sheet is too little, the bonding effect is not good, and the prepared firing cable is easy to drop the powder and even fails to bond.
(2) Mixing the binder prepared in the step (1) with the primer according to the mass ratio of 1: 3, uniformly stirring to form thick paste, and preparing into a paste medicament; the mass ratio of the binder to the ignition charge is more than 1: 3, the ignition success rate is reduced due to the fact that the relative content of the ignition powder is too small; the mass ratio of the binder to the ignition powder is less than 1: 3, the relative content of the ignition powder is too much, so that the cost is increased, the bonding effect is not good, and the manufactured ignition wire is easy to drop off the powder and even fails to bond.
(3) And (3) paving the first layer of cotton gauze on a workbench, uniformly coating the mixed pasty medicament in the step (2) on the workbench, ensuring that the amount of the pasty medicament on the first layer of cotton gauze is 2.5 g/square centimeter, and ensuring that the cost is higher as more medicaments are coated in a unit area, so that the ignition rate can be ensured to be 100% under the numerical value and the cost is reasonable.
(4) Uniformly coating the pasty medicament on cotton gauze, attaching a second layer of cotton gauze on the cotton gauze, and uniformly rolling two to three times by using a wooden roller with the diameter of about 50 mm;
(5) continuously coating the pasty medicament on the second layer of cotton gauze to ensure that the amount of the pasty medicament on the second layer of cotton gauze is 2.5 g/square centimeter;
(6) then repeating the step (4) and the step (5);
(7) according to actual requirements, making a firing cable blank with at least four layers of cotton gauze, and then placing the firing cable blank at a ventilated shade-dry place for at least 48 hours;
(8) after the firing cable blank is completely dried in the shade, the firing cable blank is cut into corresponding sizes according to actual requirements, and the firing cable can be used.
According to the preparation method of the firing cable for electroless cutting, the mass fraction of the ethanol used in the step (1) is 90%, the mass fraction of the ethanol in the ethanol aqueous solution is 90%, and the ethanol with the concentration is selected to ensure that the shellac sheet is good in effect and short in time.
When in actual use, the formula of the primer is firstly diluted into paste by a binder, then the paste is attached to cotton gauze, and after being dried in the shade, the paste can be processed into a corresponding shape for application. The fire source firstly ignites the cotton gauze fiber, the heat generated by the combustion of the cotton gauze fiber further ignites the non-volatile binder, and the heat generated by the combustion ignites the Ti powder, and finally all reactions are initiated.
The priming powder of the invention generates self-propagating reaction, wherein the main reaction is as follows:
3Fe3O4+8Al→4Al2O3+9Fe+3168.4KJ (1)
3MnO2+4Al→2Al2O3+3Mn+1759.4KJ (2)
3SiO2+4Al→2Al2O3+3Si+769.8KJ (3)
2Ti+N2→2TiN (4)
Ti+O2→TiO2 (5)
the reaction process of the invention is shown in the reaction formulas (1) - (5), the combustion of Ti powder is shown in the formulas (4) - (5) to initiate the reactions of the formulas (1) - (3), a large amount of heat is released, the reaction temperature can reach more than 3500 ℃, and the energy released by the reactions is enough to initiate the self-propagating reaction of the medicament powder in the electroless cutting product.
The beneficial effects of the invention are:
1. the invention provides a priming charge for electroless cutting, which is adhered to cotton gauze by a specific adhesive to form a priming wire, can be directly ignited by a common fire source such as a lighter, a match, a cigarette, a incense and the like, realizes gradient ignition by the reaction of the priming charge, further ignites an electroless cutting product, and enables the electroless cutting product to generate self-propagating reaction, thereby realizing the purpose of electroless cutting.
2. According to the initiator for electroless cutting, the Ti powder is added, firstly, the cotton gauze can be burnt by a common fire source, and then the Ti powder can be ignited, namely reaction formulas (4) - (5) are generated, after the Ti powder is burnt, the generated heat is enough to initiate the self-propagating reaction of other components, namely the heat generated by the common reaction of the initiator in the reaction formulas (1) - (3), so that the agent of an electroless cutting product can be ignited in a short time, and the purpose of electroless cutting is further completed.
3. The ignition powder for electroless cutting provided by the invention has low ignition point, can realize ignition in no more than 0.03 second, is not influenced by humidity, and can be burnt even under water.
4. The components and the parts by weight of the priming powder for electroless cutting provided by the invention are integrated, and the effect of the invention can be changed by changing any component or changing the parts by weight of the components in the integration.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the contents 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1:
the priming powder for electroless cutting provided by the embodiment comprises the following components in parts by weight: 25 parts of Ti, 26 parts of Al and Fe3O425 parts of MnO26 parts of CaO, 10 parts of SiO28 parts of the raw materials. The components of the ignition charge, the particle size and the parts by weight of the powder of this example are shown in Table 1.
Table 1 primer formulation components, powder particle size and parts by weight of example 1
The preparation method of the firing cable according to the formula of the firing cable in the embodiment specifically comprises the following steps:
(1) mixing the shellac with 90% of ethanol according to a mass ratio of 1: 5, standing for 3 hours, keeping the temperature of 25 ℃, and fully stirring once every 20 minutes to prepare the binder;
(2) mixing the binder prepared in the step (1) with the priming powder according to the mass ratio of 1: 3, uniformly stirring the mixture to form thick paste, and preparing the paste into a paste medicament;
(3) spreading a first layer of cotton gauze on a workbench, and uniformly coating the prepared pasty medicament in the step (2) on the workbench to ensure that the amount of the pasty medicament on the first layer of cotton gauze is 2.5 g/square centimeter;
(4) after the pasty medicament is uniformly coated on cotton gauze, a second layer of cotton gauze is attached to the upper part of the cotton gauze, and a wooden roller with the diameter of about 50mm is used for uniformly rolling twice;
(5) continuously coating the pasty medicament on the second layer of cotton gauze to ensure that the amount of the pasty medicament on the second layer of cotton gauze is 2.5 g/square centimeter;
(6) then repeating the step (4) and the step (5);
(7) the firing line blank of the six-layer cotton gauze is prepared by the embodiment, and then the firing line blank is placed at a ventilated shade position and is placed for 48 hours;
(8) and cutting the blank of the firing cable into corresponding sizes after the blank of the firing cable is completely dried in the shade, thus obtaining the firing cable.
Applying the wick of the above example, the results confirmed: the electroless cutting material was ignited at 100% and the ignition time was about 0.03 seconds.
Example 2:
the primer for electroless cutting provided by the embodiment comprises the following components in parts by weight: 23 parts of Ti, 27 parts of Al and Fe3O420 parts of MnO210 parts of CaO, 11 parts of SiO29 parts. The components of the ignition charge, the powder particle size and the parts by weight in this example are shown in Table 2.
Table 2 primer formulation components, powder particle size and parts by weight of example 2
| Serial number | Name of powder | Particle size of the powder | Parts by weight |
| 1 | Ti powder | 200 mesh at minus | 23 |
| 2 | Al powder | 200 mesh | 27 |
| 3 | Pe3O4Powder of | 150 mesh screen | 20 |
| 4 | MnO2Powder of | 150 mesh to the minus screen | 10 |
| 5 | CaO powder | 150 mesh screen | 11 |
| 6 | SO2Powder of | 100 mesh to 100 mesh | 9 |
The preparation method of the firing cable according to the formula of the firing cable in the embodiment specifically comprises the following steps:
(1) mixing the shellac sheet with ethanol in a mass ratio of 1: 5, standing for 3.5 hours, keeping the temperature at 25 ℃ in the period, and fully stirring once every 20 minutes to prepare the binder;
(2) mixing the binder prepared in the step (1) with the priming powder according to the mass ratio of 1: 3, uniformly stirring to form thick paste, and preparing into a paste medicament;
(3) spreading a first layer of cotton gauze on a workbench, and uniformly coating the mixed pasty medicament in the step (2) on the workbench to ensure that the amount of the pasty medicament on the first layer of cotton gauze is 2.5 g/square centimeter;
(4) uniformly smearing the pasty medicament on cotton gauze, attaching a second layer of cotton gauze on the cotton gauze, and uniformly rolling for three times by using a wood roller with the diameter of about 50 mm;
(5) continuously coating the pasty medicament on the second layer of cotton gauze to ensure that the amount of the pasty medicament on the second layer of cotton gauze accounts for 2.5 g/square centimeter;
(6) then repeating the step (4) and the step (5);
(7) the firing cable blank of the four-layer cotton gauze is manufactured in the embodiment, and then is placed in a ventilated shade position for 50 hours;
(8) after the firing cable blank is completely dried in the shade, the firing cable blank is cut into corresponding sizes, and the firing cable can be obtained.
Applying the wick of the above example, the results confirmed: the electroless cutting material was ignited at 100% for about 0.01 seconds.
Example 3:
the primer for electroless cutting provided by the embodiment comprises the following components in parts by weight: 20 parts of Ti, 29 parts of Al and Fe3O423 parts of MnO29 portions of CaO, 12 portions of CaO and SiO2And 7 parts. The components of the ignition charge, the powder particle size and the parts by weight in this example are shown in Table 3.
Table 3 primer formulation components, powder particle sizes and parts by weight of example 3
The preparation method of the ignition wire comprises the following steps:
(1) mixing the shellac sheet with ethanol in a mass ratio of 1: 5, standing for 4 hours, keeping the temperature at 25 ℃ in the period, and fully stirring once every 20 minutes to prepare the binder;
(2) mixing the binder prepared in the step (1) with the primer according to the mass ratio of 1: 3, uniformly stirring to form thick paste, and preparing into a paste medicament;
(3) spreading a first layer of cotton gauze on a workbench, and uniformly coating the prepared pasty medicament in the step (2) on the workbench to ensure that the amount of the pasty medicament on the first layer of cotton gauze is 2.5 g/square centimeter;
(4) after the pasty medicament is uniformly coated on cotton gauze, a second layer of cotton gauze is attached to the upper part of the cotton gauze, and a wooden roller with the diameter of about 50mm is used for uniformly rolling twice;
(5) continuously coating the pasty medicament on the second layer of cotton gauze to ensure that the amount of the pasty medicament on the second layer of cotton gauze is 2.5 g/square centimeter;
(6) then repeating the step (4) and the step (5);
(7) the method comprises the steps of preparing a firing cable blank of five-layer cotton gauze, placing the firing cable blank at a ventilated shade position, and standing for 49 hours;
(8) and cutting the blank of the firing cable into corresponding sizes after the blank of the firing cable is completely dried in the shade, thus obtaining the firing cable.
Applying the wick of the above example, the results confirmed: the electroless cutting material was ignited at 100% for about 0.02 seconds.
Comparative example 1:
the priming powder of the comparative example comprises the following components in parts by weight: 35 parts of Al, Fe3O430 parts of MnO29 parts of CaO 12 parts of SiO214 parts of the raw materials. A wick was made according to the preparation method of example 1.
Using the wick of this comparative example, the results confirmed that: can not be directly ignited by a common fire source.
Comparative example 2:
the priming powder of the comparative example comprises the following components in parts by weight: 40 parts of Al, Fe3O432 parts of MnO29 parts of CaO12 parts, SiO2And 7 parts. A wick was made according to the preparation method of example 1.
Using the wick of this comparative example, the results confirmed that: can not be directly ignited by a common fire source.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The primer powder for electroless cutting is characterized by comprising the following components in parts by weight: 23 parts of Ti, 27 parts of Al and Fe3O420 parts of MnO210 parts of CaO, 11 parts of SiO29 parts of (1); the powder granularity of each component in the primer formula is-200 meshes to-100 meshes.
2. A fuse for electroless cutting, comprising the fuse as defined in any one of claims 1 to 4.
3. A method for preparing a firing cable for electroless cutting, characterized by comprising the firing cable according to any one of claims 1 to 2, ethanol, shellac and cotton gauze.
4. The method for preparing a wick for electroless cutting according to claim 1, comprising the steps of:
(1) mixing the shellac sheet and ethanol according to a mass ratio of 1: 5, standing for at least 3 hours, keeping the temperature of 25 ℃, and fully stirring once every 20 minutes to prepare the binder;
(2) mixing the binder prepared in the step (1) with the primer according to the mass ratio of 1: 3, uniformly stirring the mixture to form thick paste, and preparing the paste into a paste medicament;
(3) spreading a first layer of cotton gauze on a workbench, and uniformly coating the mixed pasty medicament in the step (2) on the workbench to ensure that the amount of the pasty medicament on the first layer of cotton gauze is 2.5 g/square centimeter;
(4) uniformly smearing the pasty medicament on cotton gauze, attaching a second layer of cotton gauze on the cotton gauze, and uniformly rolling two to three times by using a wood roller with the diameter of about 50 mm;
(5) continuously coating the pasty medicament on the second layer of cotton gauze to ensure that the amount of the pasty medicament on the second layer of cotton gauze accounts for 2.5 g/square centimeter;
(6) then repeating the step (4) and the step (5);
(7) according to actual needs, making a firing line blank with no less than four layers of cotton gauze, and then placing the firing line blank at a ventilated shade position for no less than 48 hours;
(8) after the firing cable blank is completely dried in the shade, the firing cable blank is cut into corresponding sizes according to actual requirements, and the firing cable is obtained.
5. The method for preparing a fuse for electroless cutting as claimed in claim 4, wherein the mass fraction of ethanol used in the step (1) is 90%.
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| CN108976096A (en) * | 2018-08-30 | 2018-12-11 | 湖南浏花烟花有限公司 | A kind of ignition powder for no cutting knife |
| CN110900035A (en) * | 2019-11-20 | 2020-03-24 | 山东军浩苑环保科技有限公司 | Electroless cutting material suitable for underwater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7294565B2 (en) * | 2003-10-01 | 2007-11-13 | International Business Machines Corporation | Method of fabricating a wire bond pad with Ni/Au metallization |
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| US6227116B1 (en) * | 1995-12-20 | 2001-05-08 | Nitro Nobel Ab | Pyrotechnical charge for detonators |
| CN102128566A (en) * | 2010-11-17 | 2011-07-20 | 浏阳市余氏科技环保烟花厂 | Smoke-free quick lead |
| CN102786369A (en) * | 2012-09-02 | 2012-11-21 | 利川市忠路烟花爆竹产销有限责任公司 | Production process for firecracker fuse |
| CN108687424A (en) * | 2017-04-10 | 2018-10-23 | 中国人民解放军军械工程学院 | A kind of portable underwater wet method is without electricity welding method |
| CN108976096A (en) * | 2018-08-30 | 2018-12-11 | 湖南浏花烟花有限公司 | A kind of ignition powder for no cutting knife |
| CN110900035A (en) * | 2019-11-20 | 2020-03-24 | 山东军浩苑环保科技有限公司 | Electroless cutting material suitable for underwater |
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