CN112133509A - Current type rapid fusing resistor and manufacturing method thereof - Google Patents
Current type rapid fusing resistor and manufacturing method thereof Download PDFInfo
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- CN112133509A CN112133509A CN202011021294.8A CN202011021294A CN112133509A CN 112133509 A CN112133509 A CN 112133509A CN 202011021294 A CN202011021294 A CN 202011021294A CN 112133509 A CN112133509 A CN 112133509A
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- fusing
- resistor
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- metal film
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/034—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/075—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thin film techniques
- H01C17/12—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thin film techniques by sputtering
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- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
The invention discloses a current type rapid fusing resistor and a manufacturing method thereof, belonging to the technical field of resistor design, and comprising high thermal conductivity ceramic, an overload fusing type metal film, a rapid fusing agent, a non-flammable insulation-resistant coating layer, a mark, two tin-plated metal caps and two leads, wherein the two tin-plated metal caps are sleeved at two ends of the high thermal conductivity ceramic, the overload fusing type metal film covers the surface of the high thermal conductivity ceramic between the two tin-plated metal caps, a plurality of cutting grooves are cut on the overload fusing type metal film, the rapid fusing agent is coated at the central position of the overload fusing type metal film, the non-flammable insulation-resistant coating layer is coated on the outermost layer of the resistor, and the two leads are respectively connected with the centers of the two tin-plated metal caps and extend outwards through the non-flammable insulation-resistant coating layer. The resistor can not only achieve very accurate quick fusing time, but also improve the anti-surge capacity of the fusing resistor, and the product has wider application range.
Description
Technical Field
The invention relates to the technical field of resistor design, in particular to a current type quick fusing resistor and a manufacturing method thereof.
Background
The fuse resistor is divided into two types, namely a recoverable fuse resistor and a disposable fuse resistor, the recoverable fuse resistor plays a role of fixing the resistor within rated current, and when overcurrent occurs in a circuit, a welding point of the recoverable fuse resistor is firstly melted, so that a spring type metal wire (or an elastic metal sheet) is disconnected with the resistor. After circuit faults are eliminated, the resistor and a metal wire (or a metal sheet) are welded as required, normal use can be recovered, the use of the fusing resistor is more and more extensive along with the development of modern electronic products such as electronic computers, color televisions, program-controlled switches, teletypewriters and the like, various novel electronic products are widely entered into families in recent years, and a fireproof protection device in an electronic circuit has great responsibility on the safety of the electronic circuit.
The existing fusing resistor product has the advantages of long fusing time, dispersed fusing time parameters, weak surge resistance and poor stability, in order to pursue fusing time, a plurality of manufacturers use ceramic rods with low thermal conductivity and low alumina content or low-alkali ceramic rods, the cutting line of the resistor conductive film is controlled to be 2-3 mm, the product is poor in intermittent overload test, particularly surge test, and basically < 200V in the test of 1.2/50 mu s, so that the application range of the metal film fusing resistor is limited.
Disclosure of Invention
The invention aims to provide a current type rapid fusing resistor and a manufacturing method thereof, and aims to solve the technical problems of narrow application range, unstable fusing time, poor surge resistance and dispersed fusing time parameters in the prior art.
The invention provides a current type rapid fusing resistor and a manufacturing method thereof, wherein the current type rapid fusing resistor comprises high-thermal-conductivity ceramic, the high-thermal-conductivity ceramic is of a cylindrical structure, two ends of the high-thermal-conductivity ceramic are respectively sleeved with a tinned metal cap sleeve, and the inner sides of the two tinned metal cap sleeves are connected with the two ends of the high-thermal-conductivity ceramic through interference riveting.
Furthermore, an overload fusing type metal film covers the outer side surface of the high-thermal-conductivity ceramic between the two tinned metal caps.
Further, a plurality of cutting grooves are cut in the overload fusing type metal film.
Further, the central point of overload fusing type metallic film puts the coating and has quick fusing agent, quick fusing agent's width is 2 ~ 3mm, quick fusing agent's thickness is 2 rings of thickness of overload fusing type metallic film at most.
Furthermore, the outer sides of the quick fusing agent, the overload fusing type metal film and the two tinned metal caps are wrapped with a non-combustible insulating coating layer.
Furthermore, the central positions of the outer ends of the two tinned metal caps are respectively connected with a lead wire, and the lead wires penetrate through the incombustible insulation-resistant coating and extend outwards.
Further, marks are silk-screened on the outer surface of the incombustible insulating-resistant coating layer.
A method for manufacturing a current type fast fusing resistor comprises the following steps:
s1: preparing the high-thermal-conductivity ceramic and iron caps;
s2: carrying out deep drawing steel belt stamping on the iron cap, and carrying out tinning treatment after the surface of the iron cap is plated to form a tinned metal cap;
s3: sleeving the tinned metal caps at two ends of the high-thermal-conductivity ceramic, and performing interference riveting between the tinned metal caps and the high-thermal-conductivity ceramic;
s4: coating materials such as nickel, chromium, aluminum, iron, vanadium, silicon and the like on the outer surface of the high-thermal-conductivity ceramic, and preparing an overload fusing type metal film on the outer surface of the high-thermal-conductivity ceramic by an evaporation or vacuum sputtering method;
s5: cutting the overload fusing type metal film by using a grinding wheel cutting or laser cutting mode, so as to manufacture the resistance value required by the circuit;
s6: weighing 7-25% of thallium oxide, 25-40% of phenolic resin, 35-60% of tin powder, 2-10% of magnesium powder and 3-10% of sulfur powder respectively to prepare fusing powder, preparing a binder by taking terpineol and ethyl cellulose as main components, mixing the binder and the fusing powder to form the fusing agent, and then carrying out mass production coating by a coating machine; the coating position is the central position of the resistance conductive film, the width is 2-3 mm, and the width is at most 2 circles of the thickness of the overload fusing metal film;
s7: two leads of pure copper tinning or steel-clad tinning are respectively connected and installed at the center of the outer side end of the tinned metal cap (2);
s8: encapsulating the whole resistor by using a non-combustible insulation-resistant coating to form a non-combustible insulation-resistant coating layer;
s9: and printing character codes or color rings on the outer surface of the incombustible insulating-resistant coating layer.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the resistor adopts a structure coated with non-combustible insulating paint, when the resistor bears overload current or voltage, a specified overload fusing type metal film generates relatively high energy and surface temperature rise, the energy and the surface temperature rise are transmitted to a quick fusing agent material to be quickly fused, and larger energy and temperature rise are generated in the process, the energy and the temperature rise are enough for the overload fusing type metal film to be instantly fused, so that precious elements such as chips, ICs and the like in a circuit are protected from being damaged, and the circuit is protected from explosion, fire and the like.
Secondly, the resistor adopts the alumina ceramic bar with high thermal conductivity, so that the electrical impedance surge performance is good, and the application range is wide.
Thirdly, the resistor has very stable fusing time characteristic, can meet the optimal requirements of circuit design, and even can achieve plus or minus 1 second.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a partially exploded view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Reference numerals: lead wire 1, tin-plated metal cap 2, high thermal conductivity pottery 3, overload fuse type metal film 4, cutting flute profile 5, quick fusing agent 6, incombustible insulating coating layer 7, sign 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a current type rapid fusing resistor and a manufacturing method thereof, which are shown in the following figures 1-2, wherein the current type rapid fusing resistor comprises high-thermal conductivity ceramic 3, the high-thermal conductivity ceramic 3 is a high-thermal conductivity alumina ceramic rod, the high-thermal conductivity ceramic 3 is of a cylindrical structure, two ends of the high-thermal conductivity ceramic 3 are respectively sleeved with a tinned metal cap 2 sleeve, the tinned metal cap 2 sleeve is manufactured by performing tinning treatment on an iron cap punched by a deep-drawing steel strip after surface coating, and the inner sides of the two tinned metal caps 2 sleeves are connected with two ends of the high-thermal conductivity ceramic 3 by interference riveting.
The outer side surface of the high-thermal-conductivity ceramic 3 between the two tin-plated metal caps 2 is covered with a layer of overload fusing metal film 4, and the overload fusing metal film 4 is prepared from materials such as nickel, chromium, aluminum, iron, vanadium, silicon and the like by an evaporation or vacuum sputtering method.
The overload fusing type metal film 4 is provided with a plurality of cutting groove lines 5 in a cutting mode, and the cutting groove lines 5 are formed by conducting film cutting in a grinding wheel cutting or laser cutting mode, so that the resistance value required by the circuit is manufactured.
The center position of the overload fusing type metal film 4 is coated with a rapid fusing agent 6, the rapid fusing agent 6 is made into fusing powder by respectively weighing 7-25% of thallium oxide, 25-40% of phenolic resin, 35-60% of tin powder, 2-10% of magnesium powder and 3-10% of sulfur powder, then the fusing powder is prepared by using terpineol and ethyl cellulose as adhesives prepared by taking the main components, the adhesives and the fusing powder are mixed to form the fusing agent, mass production coating can be carried out by a coating machine, the width of the rapid fusing agent 6 is 2-3 mm, the thickness of the rapid fusing agent 6 is at most the thickness of 2 circles of the overload fusing type metal film 4, too much coating has no practical significance, when a resistor bears overload current or voltage, the specified overload fusing type metal film 4 generates relatively high energy and surface temperature rise, the energy and the surface temperature rise are transmitted to the material of the rapid fusing agent 6 to enable the overload fusing agent to be rapidly fused, and larger energy and temperature, the energy and the temperature rise are enough to cause the 4 layers of the overload fusing type metal films to be instantly blown, so that chips, ICs and other precious elements in the circuit are protected from being damaged, and the circuit is protected from explosion, fire and the like.
The fast fusing agent 6, the overload fusing type metal film 4 and the two tin-plated metal caps 2 are wrapped with a non-combustible insulating paint layer 7, and the non-combustible insulating paint layer 7 is of a structure of being coated with fireproof insulating paint.
The central positions of the outer side ends of the two tin-plated metal caps 2 are respectively connected with a lead 1, the lead 1 penetrates through the incombustible insulating-resistant coating layer 7 and extends outwards, and the lead 1 is made of pure copper tin-plated or steel-clad tin-plated wires.
A method for manufacturing a current type fast fusing resistor comprises the following steps:
s1: preparing the high thermal conductivity ceramic 3 and an iron cap;
s2: carrying out deep drawing steel belt stamping on the iron cap, and carrying out tinning treatment after the surface of the iron cap is plated to form a tinned metal cap 2;
s3: sleeving the tin-plated metal caps 2 at two ends of the high-thermal-conductivity ceramic 3, and performing interference riveting between the tin-plated metal caps 2 and the high-thermal-conductivity ceramic 3;
s4: coating materials such as nickel, chromium, aluminum, iron, vanadium, silicon and the like on the outer surface of the high-thermal-conductivity ceramic 3, and preparing an overload fusing type metal film on the outer surface of the high-thermal-conductivity ceramic 3 by an evaporation or vacuum sputtering method;
s5: cutting the overload fusing type metal film by using a grinding wheel cutting or laser cutting mode, so as to manufacture the resistance value required by the circuit;
s6: weighing 7-25% of thallium oxide, 25-40% of phenolic resin, 35-60% of tin powder, 2-10% of magnesium powder and 3-10% of sulfur powder respectively to prepare fusing powder, preparing a binder by taking terpineol and ethyl cellulose as main components, mixing the binder and the fusing powder to form the fusing agent, and then carrying out mass production coating by a coating machine; the coating position is the central position of the resistance conductive film, the width is 2-3 mm, and the width is at most 2 circles of the thickness of the overload fusing metal film;
s7: two leads of pure copper tinning or steel-clad tinning are respectively connected and installed at the center of the outer side end of the tinned metal cap 2;
s8: encapsulating the whole resistor by using a non-combustible insulation-resistant coating to form a non-combustible insulation-resistant coating layer;
s9: and printing character codes or color rings on the outer surface of the incombustible insulation-resistant coating layer in a silk-screen mode.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a quick fusing resistance of electric current type, its characterized in that, includes high thermal conductivity pottery (3), high thermal conductivity pottery (3) are cylindrical structure and adopt high thermal conductivity alumina porcelain stick, the both ends of high thermal conductivity pottery (3) all overlap and are equipped with tin-plated metal cap (2) cover, two rely on the interference riveting to be connected between the inboard of tin-plated metal cap (2) and the both ends of high thermal conductivity pottery (3).
2. An amperometric fast blowing resistor according to claim 1, wherein the outer surface of the ceramic (3) of high thermal conductivity between the two jackets of tin-plated metal caps (2) is covered with an overload blowing metal film (4).
3. An amperometric fast fusing resistor as claimed in claim 2, wherein a plurality of cutting grooves (5) are cut in the overload fusing metal film (4).
4. A current type fast fusing resistor as claimed in claim 3, wherein the center of the overload fusing metal film (4) is coated with fast fusing agent (6), the width of the fast fusing agent (6) is 2-3 mm, and the thickness of the fast fusing agent (6) is at most 2 circles of the thickness of the overload fusing metal film (4).
5. An electric current type rapid fuse resistor as claimed in claim 4, wherein the outside of the rapid fuse agent (6), the overload fuse type metal film (4) and the two tin-plated metal cap (2) sleeves are encapsulated with a layer (7) of incombustible insulating paint.
6. A current type quick fusing resistor as claimed in claim 5, wherein the central position of the outer side end of each of the two tin-plated metal caps (2) is connected with a lead (1), and the leads (1) penetrate through the incombustible insulating paint layer (7) and extend outwards.
7. A current type fast fusing resistor as claimed in claim 6 wherein the incombustible insulating paint layer (7) is silk-screened with a logo (8) on its outer surface.
8. A current mode fast fuse resistor manufacturing method as claimed in claim 7, comprising the steps of:
s1: preparing the high thermal conductivity ceramic (3) and iron cap;
s2: carrying out deep drawing steel belt stamping on the iron cap, and carrying out tinning treatment after the surface of the iron cap is plated to form a tinned metal cap (2);
s3: sleeving the tinned metal caps (2) at two ends of the high-thermal-conductivity ceramic (3), and performing interference riveting between the tinned metal caps (2) and the high-thermal-conductivity ceramic (3);
s4: coating materials such as nickel, chromium, aluminum, iron, vanadium, silicon and the like on the outer surface of the high-thermal-conductivity ceramic (3), and preparing an overload fusing type metal film on the outer surface of the high-thermal-conductivity ceramic (3) by an evaporation or vacuum sputtering method;
s5: cutting the overload fusing type metal film by using a grinding wheel cutting or laser cutting mode, so as to manufacture the resistance value required by the circuit;
s6: weighing 7-25% of thallium oxide, 25-40% of phenolic resin, 35-60% of tin powder, 2-10% of magnesium powder and 3-10% of sulfur powder respectively to prepare fusing powder, preparing a binder by taking terpineol and ethyl cellulose as main components, mixing the binder and the fusing powder to form the fusing agent, and then carrying out mass production coating by a coating machine; the coating position is the central position of the resistance conductive film, the width is 2-3 mm, and the width is at most 2 circles of the thickness of the overload fusing metal film;
s7: two leads of pure copper tinning or steel-clad tinning are respectively connected and installed at the center of the outer side end of the tinned metal cap (2);
s8: encapsulating the whole resistor by using a non-combustible insulation-resistant coating to form a non-combustible insulation-resistant coating layer;
s9: and printing character codes or color rings on the outer surface of the incombustible insulation-resistant coating layer in a silk-screen mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021294.8A CN112133509A (en) | 2020-09-25 | 2020-09-25 | Current type rapid fusing resistor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021294.8A CN112133509A (en) | 2020-09-25 | 2020-09-25 | Current type rapid fusing resistor and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112133509A true CN112133509A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011021294.8A Pending CN112133509A (en) | 2020-09-25 | 2020-09-25 | Current type rapid fusing resistor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112133509A (en) |
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2020
- 2020-09-25 CN CN202011021294.8A patent/CN112133509A/en active Pending
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