CN111489922A - Fuse melt arc-extinguishing dispensing jig and dispensing process - Google Patents

Abstract

The invention discloses a fuse melt arc extinguishing and dispensing jig and a dispensing process. The fuse melt arc extinguishing and dispensing jig and the dispensing process comprise a bottom plate, an upper cover and a positioning column. The bottom plate is inserted with There are four positioning columns. The upper end of the bottom plate between the two positioning columns is provided with a material channel for installing the solution. The material channel is provided with two colloid grooves for holding micelles. The bottom plate is equipped with an upper cover. The alignment hole matched with the column is also provided with a lower glue hole opposite to the glue tank on the upper cover. Through the above method, the present invention has the advantages of simple structure, easy operation, regular micelles of the melt dispensing finished product, stable size, continuous operation, and coil production, which can effectively wrap the melt evenly, is easy to produce, and can improve the performance of chip fuses. The breaking capacity of the product.

Description

A fuse melt arc extinguishing dispensing fixture and dispensing process

technical field

The invention relates to the technical field of fuse production, in particular to a fuse melt arc extinguishing glue dispensing fixture and a glue dispensing process.

Background technique

SMD fuse, commonly known as SMD fuse, is a one-time passive component used to protect the circuit. When the current is too large, the inherent resistance of the melt conductor itself hinders the passage of the current and heats up. The heat dissipation is less than the heat generation, and the cumulative temperature rise exceeds Its melting point, melting and disconnection, cutting off the loop current, protecting the safety of other components and circuits to prevent fire and explosion and other dangers.

SMD fuses are relatively small in size, but have high performance requirements. Before being introduced into the market, they must be approved by relevant authorities: such as UL in the United States, TUV in Germany, CQC in China, and certification standards such as UL248-1/14, IEC60127-1/ 4/7, G9364-1/4/7, the most important point in the test is the breaking capacity test. SMD fuses are different from other types of fuses. Due to the small size and space, the structure and process are different from other fuse types.

When the chip fuse is tested for breaking capacity, the resistive power supply is turned on, and the melt element is heated and sublimated from solid to gas at high temperature, usually 200 microseconds to 100 milliseconds. The charged metal gas particles, namely plasma high voltage, collide violently between particles. , forming a flashover, accompanied by high heat, strong light and micro-sounding violent combustion, the plasma of high-voltage, high-heat and strong electric field force directly acts on the TUBE body of the chip fuse and the end cap CAP. Arc glue, under the limitations of the age of tube material technology, the breaking capacity is limited, and it is difficult to reach the breaking capacity of 100A250VAC or even 300A250VAC. The chip current fuse with high breaking capacity is developed, and the glue is dispensed on the melt to extinguish the arc, which can effectively block the plasma during arcing and continue to extend and expand. It is an effective way to improve the breaking capacity, but the chip fuse The arc-extinguishing glue process on the melt can only be applied manually in the laboratory. As a result, this solution cannot transform scientific and technological achievements, bring mass production to the market, and reach the user terminal to serve the society. Based on the above defects and deficiencies, it is necessary to The existing technology is improved, and a fuse melt arc extinguishing glue dispensing fixture and glue dispensing process are designed.

SUMMARY OF THE INVENTION

The main technical problem to be solved by the present invention is to provide a fuse melt arc-extinguishing glue dispensing fixture and a glue dispensing process, which has a simple structure, is easy to operate, has a regular micellar mass of the finished melt dispensing product, is stable in size, can be continuously operated, and can be used for coil material. It can effectively wrap the melt evenly, easy to produce, and can improve the breaking capacity of SMD fuse products.

In order to solve the above-mentioned technical problems, a technical solution adopted in the present invention is to provide a fuse melt arc-quenching and dispensing jig and a dispensing process, and the fuse melt arc-quenching and dispensing jig includes a bottom plate, an upper cover and a positioning The bottom plate is equipped with four positioning columns, and the upper end of the bottom plate between the two positioning columns is provided with a forehearth for installing the solution. , the upper cover is provided with an alignment hole matched with the positioning column, and the upper cover is also provided with a lower glue hole opposite to the colloid groove.

Preferably, the bottom plate is made of strong NdFeB magnets, controlled by magnetic switches, the curvature of the bottom plate is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, the surface is polished and mirror-plated with nickel, and the thickness is 5mm. -50mm.

Preferably, the upper cover is made of 304 stainless steel, the warpage is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, the surface is polished and mirror nickel-plated, and the thickness is 0.1mm-1.0mm.

Preferably, the positioning column adopts a vertically retractable guide column, and the shape of the positioning column is a trapezoidal column.

Preferably, the colloid groove is in the shape of a spindle, which is fixed, formed and demolded by the melt arc extinguishing glue of the chip fuse.

Preferably, the lower glue hole is in the shape of a waist drum, and the upper and lower positions of the lower glue hole and the glue tank are opposite to each other.

Preferably, the depth of the material channel is greater than or equal to the diameter of the solution, ranging from 0.2 mm to 1.5 mm.

A fuse melt arc extinguishing and dispensing process, characterized in that it comprises the following steps:

a. Melt into the forehearth: guide the melt of the SMD fuse into the forehearth 11 along the trapezoidal guide surface on the top of the four positioning columns;

b. Press and place the upper cover: put the upper cover along the positioning column and drop it directly above the bottom plate, turn on the magnetic switch of the bottom plate, tighten the upper cover and fix it, and flatten the elastic positioning column, which is not higher than the surface of the upper cover;

c. Dispensing: Pour the glue or ink with the adjusted ratio and viscosity into the upper cover, scrape the lower glue hole into the colloid tank, or adjust the appropriate angle and output of the needle and inject it into the lower glue hole until it overflows. Scrape off the glue or ink on the surface of the upper cover;

d. Glue curing: Corresponding to the characteristics of the glue, UV curing glue, adjust the energy or temperature power for curing, and the curing time is 1 second to 30 seconds;

e. Take out the upper cover: turn off the magnetic switch of the bottom plate 1, and take out the upper cover;

f. Demoulding: apply force vertically to bring out the melt glue column.

Compared with the prior art, the beneficial effects of the present invention are:

The structure is simple, easy to operate, the micellar group of the finished melt dispensing product is regular, the size is stable, it can be continuously operated, and the coil material can be produced, which can effectively wrap the melt evenly, easy to produce, and can improve the breaking capacity of SMD fuse products.

Description of drawings

FIG. 1 is a schematic structural diagram of a fuse melt arc extinguishing and dispensing fixture.

Figure 2 is a front view of the bottom plate of a fuse melt arc extinguishing dispensing fixture.

FIG. 3 is a top view of the bottom plate of a fuse melt arc extinguishing dispensing fixture.

FIG. 4 is a front view of the upper cover of a fuse melt arc extinguishing dispensing fixture.

FIG. 5 is a schematic structural diagram of a SMD fuse melt dispensing product.

FIG. 6 is a flow chart of a fuse melt arc extinguishing and dispensing process.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

Please refer to FIG. 1 to FIG. 6, the embodiments of the present invention include:

A fuse melt arc extinguishing and dispensing jig, the fuse melt arc extinguishing and dispensing jig comprises a bottom plate 1, an upper cover 2 and a positioning column 3, the bottom plate 1 is inserted with four positioning columns 3, two positioning columns The upper end of the bottom plate 1 between the columns 3 is provided with a material channel 11 for installing the melt 4. The material channel 11 is provided with two colloid grooves 12 for holding the colloid 5. The bottom plate 1 is provided with an upper cover 2, and the upper cover 2 There are alignment holes 21 matched with the positioning posts 3 , and the upper cover 2 is also provided with a lower glue hole 22 opposite to the glue groove 12 .

The bottom plate 1 is made of NdFeB strong magnets, controlled by magnetic switches, the warp degree of the bottom plate 1 is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, the surface is polished and mirror nickel-plated, and the thickness is 5mm-50mm .

The upper cover 2 is made of 304 stainless steel, the warpage is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, the surface is polished and mirror-plated with nickel, and the thickness is 0.1mm-1.0mm.

The positioning column 3 adopts a vertically retractable guide column, and the shape of the positioning column 3 is a trapezoidal column.

The colloid tank 12 is in the shape of a spindle, and is used for fixing, molding and demoulding of the SMD fuse melt arc-extinguishing glue.

The lower glue hole 22 is in the shape of a waist drum, and the lower glue hole 22 is opposite to the upper and lower positions of the glue tank 12 .

The depth of the feed channel 11 is greater than or equal to the diameter of the solution, which is 0.2mm-1.5mm.

A fuse melt arc extinguishing and dispensing process, characterized in that it comprises the following steps:

a. Melt into the forehearth: guide the melt 4 of the chip fuse into the forehearth 11 along the trapezoidal guide surface on the top of the four positioning columns 3;

b. Press and place the upper cover: put the upper cover 2 along the positioning column 3 directly above the bottom plate 1, turn on the magnetic switch of the bottom plate, tighten the upper cover 2, and flatten the elastic positioning column 3, which is not higher than the upper cover 2 surface;

c. Dispensing: Pour the glue or ink with the adjusted ratio and viscosity into the upper cover 2, scrape the lower glue hole 22 into the colloid tank 12, or adjust the appropriate angle and output of the needle and inject it into the lower glue hole 22 Until it overflows, scrape off the glue or ink on the surface of the upper cover 2;

d. Glue curing: Corresponding to the characteristics of the glue, UV curing glue, adjust the energy or temperature power for curing, and the curing time is 1 second to 30 seconds;

e. Take out the upper cover: turn off the magnetic switch of the bottom plate 1, and take out the upper cover 2;

f. Demoulding: apply force vertically to bring out the melt glue column, repeat a.

The melt 4 is the current-carrying core element of the chip fuse, and the material is copper-tin, copper-silver alloy wire or pure copper, pure silver metal wire, which is wound on the glass fiber wire into a spiral structure, or a stranded wire structure, or a single The root direct structure is put into the feed channel 11 of the bottom plate 1;

The micelle 5 is transparent, translucent or opaque silica gel or epoxy resin glue, the drying and hardening method is UV, IR, high temperature or normal temperature, and the viscosity is 2000dps-200dps.

The invention is a fuse melt arc-extinguishing glue dispensing fixture and glue dispensing process, which has the advantages of simple structure, convenient operation, regular micelles of the melt dispensing finished product, stable size, continuous operation, coil production, and efficient melting The body is evenly wrapped, easy to produce, and can improve the breaking capacity of SMD fuse products.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (8)

1. The utility model provides a tool is glued to fuse arc extinguishing point which characterized in that: this kind of tool is glued to fuse arc extinguishing point includes bottom plate, upper cover and reference column, the bottom plate cartridge has four reference columns, and the bottom plate upper end between two reference columns is provided with the material way that is used for installing the solution, is equipped with dual-purpose in the colloid groove that holds the micelle on the material way, is equipped with the upper cover on the bottom plate, on cover be equipped with reference column complex counterpoint hole, on cover still to be provided with down the gluey hole relative with the colloid groove.

2. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the bottom plate adopts neodymium iron boron strong magnet, the switch is controlled by magnetism, the warping degree of the bottom plate is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, the surface is polished with mirror surface nickel plating, and the thickness is 5mm-50 mm.

3. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the upper cover is made of 304 stainless steel, the warping degree is less than 0.1mm/100mm, the flatness is less than 0.1, the roughness is less than 0.05, and the surface is polished with a mirror surface and is subjected to nickel plating treatment, and the thickness is 0.1mm-1.0 mm.

4. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the positioning column adopts a guide column which can be vertically stretched, and is in a trapezoidal column shape.

5. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the colloid groove is in a spindle shape and is used for fixing, forming and demoulding the arc extinguishing glue of the surface-mounted fuse melt.

6. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the lower glue hole is waist drum-shaped, and the lower glue hole is opposite to the upper position and the lower position of the glue groove.

7. The fuse melt arc extinguishing and dispensing jig according to claim 1, characterized in that: the depth of the material channel is more than or equal to the diameter of the solution and is 0.2mm-1.5 mm.

8. A fuse melt arc extinguishing and dispensing technology is characterized in that: the method comprises the following steps:

a. a solution feeding channel: guiding the melt of the surface-mounted fuse along the trapezoidal guide surfaces at the tops of the four positioning columns and placing the melt into the material channel 11;

b. pressing an upper cover: placing the upper cover right above the bottom plate along the positioning column, opening the magnetic switch of the bottom plate, tightly sucking and fixing the upper cover, and flattening the elastic positioning column to be not higher than the surface of the upper cover;

c. dispensing: pouring the glue or the ink with the well-adjusted proportion and viscosity onto the upper surface of the upper cover, scraping the glue or the ink into the glue groove through the lower glue hole, or adjusting the proper angle and the glue outlet amount of the needle head, and injecting the glue or the ink into the lower glue hole until the glue or the ink overflows, so as to scrape the glue or the ink on the surface of the upper cover;

d. glue solidification: according to the characteristics of the glue, UV (ultraviolet) is used for curing the glue, the energy or temperature power is well cured and adjusted, and the curing time is 1-30 seconds;

e. taking out the upper cover: closing the magnetic switch of the bottom plate 1 and taking out the upper cover;

f. demolding: and applying force vertically to lift the melt glue column.

Images