CN113990719B - Flame-retardant explosion-proof fuse and packaging manufacturing method - Google Patents
Flame-retardant explosion-proof fuse and packaging manufacturing method Download PDFInfo
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- CN113990719B CN113990719B CN202111307633.3A CN202111307633A CN113990719B CN 113990719 B CN113990719 B CN 113990719B CN 202111307633 A CN202111307633 A CN 202111307633A CN 113990719 B CN113990719 B CN 113990719B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/47—Means for cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H2085/388—Means for extinguishing or suppressing arc using special materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Abstract
The invention provides a flame-retardant explosion-proof fuse and a packaging manufacturing method, which comprises a packaging layer and a ceramic tube, and is characterized in that: a conductive fuse wire and a polymer are arranged in the ceramic tube, and the polymer fills the inner cavity of the ceramic tube; the two ends of the ceramic tube are respectively provided with a metal electrode, the two ends of the fuse wire are respectively welded with the metal electrodes at the corresponding ends, and the outer end of each metal electrode is respectively welded with a conductive pin wire. The fuse provided by the invention has an excellent arc extinguishing effect, and prevents explosion phenomenon generated when the fuse burns to a great extent; the quartz sand also plays a role in extinguishing electric arcs and rapidly conducting output heat to prevent arcing; the quartz sand can quickly transfer heat to the periphery, and besides quick heat dissipation, a part of heat can activate and decompose more ammonium polyphosphate to generate more insulating gas, nitrogen and ammonia in a short time; the insulating gas plays a role in extinguishing an arc generated by the fuse wire when the fuse wire is short-circuited.
Description
Technical Field
The invention belongs to the technical field of circuit protection devices, and relates to a flame-retardant explosion-proof fuse and a packaging manufacturing method.
Background
The fuse is a component for protecting a circuit, is widely used in various electronic equipment such as televisions, refrigerators, air conditioners, washing machines and the like, is shown in figure 1 in an external cross-sectional view, and comprises a ceramic tube 2, an in-tube fuse 3 and a fuse 3 which are respectively welded on copper caps 4 at two ends to form electrodes, lead wires 5 respectively welded on the copper caps 4 at two ends, and epoxy resin integrally encapsulated outside the ceramic tube 2 to form an encapsulation layer 1. The working principle of the fuse is that heat generated by current on the fuse wire is melted and disconnected by metal wires in the ceramic tube when the heat reaches a certain critical value, and finally the effect of protecting a circuit is achieved. However, when the instantaneous current passing through the fuse is too large, the metal fuse in the ceramic tube is not melted but burned, and the protection effect of the fuse on the circuit indirectly becomes a threat factor of surrounding components.
In particular, the state has relevant regulations on the size and the fusing characteristics, for the fuse, the fuse is prevented from burning in a strong electric field formed by short circuit to become extremely difficult, when a strong transient overvoltage occurs in a short time, the surface of the fuse starts to generate an arc, and the arcing point is random, at the moment, uncharged particles outside the fuse are activated into charged carriers, the formation of a passband outside the current is further promoted, the current flowing through the fuse is huge, the instantaneous high-heat ignition of the encapsulation resin is caused, and the whole process time is shorter; at present, when a short-circuit voltage is introduced into the low-voltage miniature fuse, the fuse is instantaneously melted, and meanwhile, high-density energy waves are generated, so that the impact force can damage a ceramic insulating tube of the fuse, and the impact force causes great threat to surrounding components.
In order to solve the problems of burning and explosion caused by short circuit failure of the fuse, a part of people select the matching technology of the fuse and additional devices, and the additional devices such as a short circuit breaker, an integrated control circuit, a shunt and the like are commonly matched with the additional devices, and the additional devices can cut off a circuit when the fuse is overheated, so that short circuit current is safely cut off from the circuit. However, these accessories are only suitable for the disconnection of the main valve and the main line of the circuit, and the protection effect is not obvious due to the circuit disconnection time difference and rated current difference when the short circuit problem of external electric appliances such as sockets, charging heads and the like exists. There is a need for a more direct circuit protection device, a flame retardant and explosion proof fuse.
The other part chooses to change the material and the size of the fuse wire to achieve the flame-retardant and explosion-proof effects, and pure silver wires or even gold wires are often adopted to manufacture the fuse wire, so that the internal resistance of the fuse wire is reduced, the I2t (current combustion heat) value is reduced, and finally the flame-retardant and explosion-proof effects are achieved.
The principle of the method is that at the moment of arcing, a certain measure is taken to extinguish the arc, so that the flame-retardant and arc-extinguishing effects are achieved, the common arc-extinguishing material is quartz sand, which is also commonly called as arc-extinguishing sand, a great deal of research is carried out on the arc-extinguishing sand in the current stage of China, and meanwhile, the arc-extinguishing effect of the quartz sand is verified. However, the space inside the ceramic tube of the small-sized fuse is limited, enough quartz sand cannot be added to extinguish the arc, experiments show that the arc propagates in gaps of the quartz sand to form a current channel, and therefore the fuse needs a packaging mode with excellent usability, good flame retardance and explosion resistance and low cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a flame-retardant and explosion-proof fuse adopting a gas flame-retardant mechanism and a packaging manufacturing method; under the condition of strong short circuit current, the fuse can realize flame retardance, explosion prevention and smooth circuit breaking, realize the protection effect on the circuit, and simultaneously consider the packaging mode with low cost and simple process.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a fire-retardant explosion-proof type fuse, includes encapsulation layer and ceramic tube, its characterized in that: a conductive fuse wire and a polymer are arranged in the ceramic tube, and the polymer fills the inner cavity of the ceramic tube; the two ends of the ceramic tube are respectively provided with a metal electrode, the two ends of the fuse wire are respectively welded with the metal electrodes at the corresponding ends, and the outer end of each metal electrode is respectively welded with a conductive pin wire.
Therefore, the fuse of the invention has excellent arc extinguishing effect and prevents explosion phenomenon generated when the fuse burns to a great extent.
Further: the polymer comprises the following components in percentage by mass: 84% -95% of powder: 4% -15% of a toughening agent: 0.3 to 0.8 percent of binding agent and 0.3 to 0.5 percent of adhesive;
the coarse aggregate is one or two or three or four of silicon dioxide, aluminum nitride, nano silicon powder and calcium oxide;
the powder is ammonium polyphosphate, or a mixture of ammonium polyphosphate and melamine formaldehyde resin, or a mixture of ammonium polyphosphate, melamine and melamine formaldehyde resin; the toughening agent is one or two of glass fiber threads and asbestos threads; the bonding agent is one or two or three of silicon resin, epoxy resin and phenolic resin.
Thus, ammonium polyphosphate in the polymer is activated at high temperature (more than 400 ℃) to decompose stable insulating gas, namely nitrogen and ammonia; and is relatively stable at normal temperature (less than 200 ℃); the insulating gas plays a role in extinguishing an arc generated by the fuse wire when the fuse wire is short-circuited. Melamine is a surface modifier, melamine formaldehyde resin is a curing agent, and the melamine formaldehyde resin and the curing agent have the function of ensuring that ammonium polyphosphate can quickly and smoothly release gas at high temperature.
Further: the coarse aggregate is quartz sand, the granularity is 80-120 meshes, and the mass is 85-95%;
the powder is prepared by mixing 3-13% of ammonium polyphosphate and 0.5-1.5% of melamine; the toughening agent is formed by mixing glass fiber wires with asbestos wires, wherein the mass of the glass fiber wires is 0.2% -0.5%, and the mass of the asbestos wires is 0.1% -0.3%; the binding agent is phenolic resin, and the mass of the binding agent is 0.2% -0.5%. Therefore, the quartz sand also plays a role in extinguishing the arc, and the arcing phenomenon is prevented by rapidly conducting and outputting huge energy generated during arcing in the form of heat; the quartz sand can quickly conduct heat to the periphery, besides quick heat dissipation, a part of heat can activate and decompose more ammonium polyphosphate, and more insulating gas is generated in a short time.
Further: the polymerization degree of the ammonium polyphosphate is more than 1000. Can be activated at high temperature
More insulating gas is decomposed.
Further: the metal electrode is copper or copper alloy.
Further: the fuse is formed by winding metal wires on fiber wires, wherein the metal wires are spirally wound
Is made on the fiber line. Thus, the wire winding can control the rated current of the fuse through controlling the pitch of the wire so as to achieve high cost performance.
Further: the metal wire is annealed silver-copper alloy, the silver mass ratio is 50-60%, and the copper is
The weight ratio is 40-50%; the fiber thread is fire-resistant fiber cotton.
Further: the diameter of the metal wire is 0.125mm, and the metal wire is wound on a fiber wire with the diameter of 0.1mm
The metal wire is spirally attached to the fiber wire, and the pitch is 0.5mm. This allows for the attainment of state-related prescribed fuse times by adjusting the diameter and pitch of the wire.
In a word, the flame-retardant explosion-proof type fuse and the packaging manufacturing method have the following beneficial effects:
1. the polymer adopted by the invention is activated and decomposed into stable insulating gas, namely nitrogen and ammonia at high temperature (more than 400 ℃); and is relatively stable at normal temperature (less than 200 ℃); the insulating gas plays a role in extinguishing an arc generated by the fuse wire when the fuse wire is short-circuited.
2. The quartz sand in the polymer also plays a role in extinguishing the arc, but the arc extinguishing mechanism is not the gas flame-retardant arc extinguishing mentioned before, but another arc extinguishing mechanism is used for preventing the arcing phenomenon by rapidly conducting and outputting huge energy generated during the arcing in the form of heat; the quartz sand can quickly transfer heat to the periphery, and besides quick heat dissipation, a part of heat can activate and decompose more ammonium polyphosphate to generate more insulating gas in a short time; the insulating gas flame-retardant mechanisms complement each other, and the performance of extinguishing the arc is enhanced under the combined action of rapid heat dissipation of quartz sand.
3. The melamine in the polymer is a surface modifier, so that a film which is easy to be solidified by a solidifying agent can be formed on the solid surface of ammonium polyphosphate, quartz sand and the like, thereby enhancing the strength of the whole fuse.
4. The toughening agent in the polymer aims to enable the glass fiber wires to absorb the energy of arcing and enhance the strength of the whole fuse by matching with the bonding agent.
In short, the invention combines the various arc extinguishing actions mentioned above, and prevents explosion phenomenon generated when the fuse burns to a great extent; the flame retardant and explosion proof performance of the fuse is obviously improved as a whole.
Drawings
FIG. 1 is a cross-sectional view of a prior art package fuse package structure;
FIG. 2 is a cross-sectional view of a fuse package structure of the present invention;
FIG. 3 is an external cross-sectional view of an internal fuse of the present invention;
FIG. 4 is a flow chart of the package fabrication process of the present invention;
fig. 5 is a time current graph of the fuse of the present invention.
In the figure, 11-encapsulation layer, 12-ceramic tube, 13-polymer, 14-fuse, 15-metal electrode, 16-lead wire, 141-metal wire 141, 142-fiber wire.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
As shown in FIG. 2, the flame-retardant explosion-proof fuse provided by the invention comprises an encapsulation layer 11 and a ceramic tube 12, wherein the encapsulation layer 11 is usually formed by encapsulating epoxy resin, the ceramic tube 12 is arranged in the encapsulation layer 11, a conductive fuse 14 and a polymer 13 are arranged in the ceramic tube 12, and the polymer 13 is filled in the inner cavity of the ceramic tube 12; the two ends of the ceramic tube 12 are respectively provided with a metal electrode 15, the two ends of the fuse 14 are respectively welded with the metal electrodes 15 at the corresponding ends, and the metal electrodes 15 are made of copper or copper alloy and other materials to form a copper cap; the outer end of each metal electrode 15 is welded with a conductive pin wire 16, and is communicated with an external power supply through the pin wires 16 at the two ends. The encapsulation layer 11 generally encapsulates the ceramic tube 12, the metal electrodes 15 at both ends, and the connection portions between the metal electrodes 15 and the lead wires 16, thereby forming an integral fuse.
The fuse 14 of the present invention, as shown in fig. 3, is formed by winding a metal wire 141 around a fiber wire 142, the metal wire 141 being spirally attached to the fiber wire 142; specifically, the fiber yarn with the diameter of 0.125mm can be wound on the fiber yarn with the diameter of 0.1mm by using a metal wire, the metal wire is spirally attached to the fiber yarn, and the pitch is 0.5mm. The metal wire of the invention can be made of annealed silver-copper alloy, and the invention provides a specific percentage formula: 50-60% of silver and 40-50% of copper. The fiber thread can be fire-resistant fiber cotton.
The polymer 13 filled in the inner cavity of the ceramic tube 12 is a mixture, which is formed by mixing coarse aggregate, powder, a toughening agent and a bonding agent according to a certain mass percentage: 84% -95% of powder: 4% -15% of a toughening agent: 0.3 to 0.8 percent of binding agent and 0.3 to 0.5 percent of adhesive.
The coarse aggregate of the polymer is selected from one or more of high-melting-point inorganic materials, preferably one or two or three or all four of silicon dioxide, aluminum nitride, nano silicon powder and calcium oxide;
the polymer powder is formed by mixing one or more of high-temperature-resistant polymer materials, preferably one or two or three of ammonium polyphosphate, melamine and melamine formaldehyde resin;
the polymer toughening agent can be one of glass fiber threads and asbestos threads or a mixture of the glass fiber threads and the asbestos threads;
the bonding agent of the polymer can be one or two or three of heat-conducting silicone resin, epoxy resin and phenolic resin.
The polymer of the invention, in which the powder, such as ammonium polyphosphate, is activated to decompose stable insulating gases, nitrogen and ammonia, at high temperature (greater than 400 ℃); and is relatively stable at normal temperature (less than 200 ℃).
The invention provides a specific percentage optimization formula of a polymer:
quartz sand (80-120 mesh): 85% -95%,
ammonium polyphosphate (degree of polymerization greater than 1000): 3 to 13 percent,
melamine: 0.5 to 1.5 percent,
glass fiber line (humidity less than 1%): 0.2 to 0.5 percent,
asbestos threads (humidity less than 1%): 0.1 to 0.3 percent,
phenolic resin: 0.2% -0.5%.
Examples of the formulation of the polymers of the invention are as follows:
1. taking 1kg of quartz sand produced in the flat pool as coarse aggregate, wherein the particle size of the quartz sand is required to be 80-120 meshes;
2. adding 80g of ammonium polyphosphate as powder, wherein the polymerization degree is required to be above 1000;
3. 5g of a mixture of glass fiber threads and asbestos threads is added to be used as a toughening agent, and the moisture in the material is required to be lower than 1%;
4. adding a mixture (binder) of 6g melamine (powder) and 5g phenolic resin, requiring a material moisture of less than 1%;
5. the foregoing mixture was placed in a sand roller and mixed to form a relatively uniform mixture having an air humidity of about 55% to produce the polymer of the present invention.
The invention relates to a packaging manufacturing method of a flame-retardant explosion-proof fuse, which comprises the following steps:
1. according to the technological requirements, preparing an assembly meeting the quality requirements for assembling the fuse: epoxy forming the encapsulation layer 11, ceramic tube 12, polymer 13, fuse 14, metal electrode 15 and lead wire 16; the metal wire 141 is spirally wound on the fiber wire 142 to form the fuse 14;
2. passing the fuse 14 through the bonded ceramic tube 12; welding, such as soldering with an electric iron, firstly welding one end of the ceramic tube 12, and connecting the metal electrode 15 of the end with one end of the fuse 14;
3. adding the prepared polymer 13 from the other end of the ceramic tube 12, then welding the other end of the ceramic tube 12, and connecting the metal electrode 15 of the end with one end of the fuse 14; then the excess fuse 14 is trimmed with a pair of scissors;
4. crimping or welding the welded product to enable the lead wires 16 to be respectively connected with the metal electrodes 15 at the corresponding ends;
5. after the pin wires 16 at the two ends are crimped, the coating is carried out by adopting epoxy resin to form the packaging layer 11;
6. baking in oven at 90-150 deg.C to obtain the invented fuse.
The following performance tests were performed on the fuses obtained according to the present invention:
a. short circuit test
The manufactured product is connected into an analog short-circuit device for testing, and the explosion-proof performance of the product is verified in alternating-current short-circuit voltages of 224V, 244V, 264V, 270V and 280V respectively.
Test results:
short circuit tests were performed at 224V for a total of 100, 100 pass.
Short circuit tests were performed at 244V for a total of 100, 100 pass.
Short circuit tests were performed at 264V, a total of 100, 96, and 4 explosions were tested.
Short circuit tests were performed at 270V for a total of 100, 90 pass, 10 explosion.
Short circuit tests were performed at 280V for a total of 100, 86 pass, 14 explosions.
b. Electrical property test
1) Experimental conditions
All test ambient temperatures were 25.+ -. 5 ℃.
2) Breaking capacity
50 amps at 125 volts ac.
3) Temperature rise test
When the fuse is tested at 100% times rated current, the temperature of the fuse is measured after the heat balance is reached, and the temperature of the surface of the fuse does not rise by more than 75 ℃.
Note that: temperature rise = temperature of fuse surface-ambient temperature
4. Time-current characteristics
| % of rated current | Time to blow out |
| 100% | For more than 16 hours |
| 200% | For more than 2 |
| 1000% | Less than 10 minutes |
5. Welding parameters
8.5.1 Wave soldering is carried out at 260 ℃ for 10 seconds at maximum,
8.5.2 Hand welding at 350 deg.c for 5 sec maximum.
6. The time current profile of the fuse of the present invention is shown in fig. 5, from which we provide a reference for verification of the final electrical characteristics of the product.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents of the technical solution of the present invention can be made without departing from the spirit and scope of the technical solution, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a fire-retardant explosion-proof type fuse, includes encapsulation layer (11) and ceramic pipe (12), its characterized in that: a conductive fuse wire (14) and a polymer (13) are arranged in the ceramic tube (12), and the polymer (13) fills the inner cavity of the ceramic tube (12); the two ends of the ceramic tube (12) are respectively provided with a metal electrode (15), the two ends of the fuse wire (14) are respectively welded with the metal electrodes (15) at the corresponding ends, and the outer end of each metal electrode (15) is respectively welded with a conductive pin wire (16);
the polymer comprises the following components in percentage by mass: 84% -95% of powder: 4% -15% of a toughening agent: 0.3 to 0.8 percent of binding agent and 0.3 to 0.5 percent of adhesive;
the coarse aggregate is one or two or three or four of silicon dioxide, aluminum nitride, nano silicon powder and calcium oxide;
the powder is ammonium polyphosphate, or a mixture of ammonium polyphosphate and melamine formaldehyde resin, or a mixture of ammonium polyphosphate, melamine and melamine formaldehyde resin;
the toughening agent can be one or two of glass fiber threads and asbestos threads;
the bonding agent is one or two or three of silicon resin, epoxy resin and phenolic resin.
2. The flame retardant, explosion proof fuse of claim 1, wherein:
the coarse aggregate is quartz sand, the granularity is 80-120 meshes, and the mass is 85-95%;
the powder is prepared by mixing 3-13% of ammonium polyphosphate and 0.5-1.5% of melamine;
the toughening agent is glass fiber wires and asbestos wires, the mass of the glass fiber wires is 0.2% -0.5%, and the mass of the asbestos wires is 0.1% -0.3%;
the binding agent is phenolic resin, and the mass of the binding agent is 0.2% -0.5%.
3. The flame-retardant explosion-proof fuse according to claim 1 or 2, wherein: the polymerization degree of the ammonium polyphosphate is more than 1000.
4. The flame-retardant explosion-proof fuse according to claim 1 or 2, wherein: the metal electrode (15) is copper or a copper alloy.
5. The flame-retardant explosion-proof fuse according to claim 1 or 2, wherein: the fuse wire (14) is formed by winding a metal wire (141) on a fiber wire (142), and the metal wire (141) is spirally wound on the fiber wire (142).
6. The flame retardant, explosion proof fuse of claim 5, wherein: the metal wire is annealed silver-copper alloy, the silver mass ratio is 50-60%, and the copper mass ratio is 40-50%; the fiber thread is fire-resistant fiber cotton.
7. The flame retardant, explosion proof fuse of claim 6, wherein: the diameter of the metal wire is 0.125mm, the metal wire is wound on a fiber wire with the diameter of 0.1mm, the metal wire is spirally attached to the fiber wire, and the pitch is 0.5mm.
8. The packaging manufacturing method of the flame-retardant explosion-proof fuse is characterized by comprising the following steps:
1) Preparing the assembly of the fuse of any one of claims 1-7 according to process requirements, and spirally winding a metal wire on a fiber wire to form the fuse;
2) Passing the fuse wire through the bonded ceramic tube; welding, namely welding one end of the ceramic tube, and connecting a metal electrode at the end with one end of the fuse;
3) Adding the prepared polymer from the other end of the ceramic tube, welding the other end of the ceramic tube, and connecting the metal electrode at the end with the end of the fuse; then cutting off redundant fuses by using a cutting pliers;
4) Crimping or welding the welded product to enable the pin wires to be connected with the metal electrodes at the corresponding ends respectively;
5) After the pin wires at the two ends are crimped, epoxy resin is adopted for coating, so that a packaging layer is formed;
6) And (5) placing the fuse into an oven, and baking according to the technological requirements to obtain the fuse.
9. The method of manufacturing a package for a flame retardant and explosion proof fuse as set forth in claim 8, wherein the baking temperature is 90 ℃ to 150 ℃.
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| CN202111307633.3A CN113990719B (en) | 2021-11-05 | 2021-11-05 | Flame-retardant explosion-proof fuse and packaging manufacturing method |
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2021
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| US4032879A (en) * | 1975-11-18 | 1977-06-28 | Teledyne, Inc. | Circuit-protecting fuse having arc-extinguishing means |
| US4225840A (en) * | 1979-04-04 | 1980-09-30 | Gould Inc. | Electric fuse with support for helically wound fusible element |
| US5446436A (en) * | 1992-11-04 | 1995-08-29 | Space Systems/Loral, Inc. | High voltage high power arc suppressing fuse |
| US6005470A (en) * | 1993-12-13 | 1999-12-21 | Eaton Corporation | Arc-quenching filler for high voltage current limiting fuses and circuit interrupters |
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