KR102585334B1 - Nozzle assembly for selective soldering - Google Patents

Abstract

The present invention relates to a nozzle assembly for selective soldering, which is coupled to a lead supply pipe to spray melt lead. The nozzle assembly includes: a nozzle bracket (110) screwed to the lead supply pipe (10); and a nozzle cap (120) detachably coupled to the nozzle bracket (110) by a magnetic force and spraying melt lead, wherein the nozzle bracket (110) includes: a bracket body (111) formed with an outer diameter corresponding to the outer diameter of the lead supply pipe (10); a cap insertion pipe (113) protruding from an upper part of the bracket body (111) and inserted into the nozzle cap (120) to supply the melt lead to the nozzle cap (120); a supply pipe coupling pipe (115) protruding from a lower part of the bracket body (111) to be screwed to the lead supply pipe (10); and a plurality of magnets (117) housed to be embedded at regular angle intervals along the circumferential direction in a plate surface of the bracket body (111), and applying a magnetic force to the nozzle cap (120). Therefore, the present invention is capable of coupling a nozzle cap to always be in the same position regardless of the worker's skill level.

Description

Nozzle assembly for selective soldering}

The present invention relates to a nozzle assembly, and more specifically to a nozzle assembly used for selective soldering.

Soldering equipment is an essential piece of equipment in the PCB manufacturing process. In particular, many devices that automatically solder through SMT have been proposed for mass production of products, and soldering is no longer limited to the area in which soldering is done manually by workers, but also exists in the area where it is done automatically through machines.

Among these automatic soldering equipment, selective soldering technology can fully meet the needs of functionality, miniaturization, performance enhancement, etc., and can also minimize the heat exposure of each element, extremely lowering the probability of element defects. In addition, it is a technology that is currently widely used because it has a cost-saving effect.

Selective soldering moves molten lead from a storage tank where molten lead is stored through a lead supply pipe and then discharges the molten lead to a location where selective soldering is required through a nozzle.

Figure 1 is an exemplary diagram showing the process of combining the nozzle tip 20 and the lead supply pipe 10 used in conventional selective soldering. As shown, a female thread 11 is formed at the upper part of the conventional lead supply pipe 10, and a nozzle coupling end 23 inserted into the inside of the lead supply pipe 10 is formed protruding at the lower part of the nozzle tip 20. , a male thread (23a) is formed on the outer peripheral surface of the nozzle coupling end (23). In some cases, a male thread may be formed in the lead supply pipe 10 and a female thread may be formed in the nozzle coupling end 23.

Molten lead (A) supplied through the lead supply pipe (10) is supplied to the soldering position through the nozzle inlet (21) of the nozzle tip (20) for soldering. However, during this process, the molten lead (A) discharged from the nozzle tip 20 flows downward along the surface of the nozzle tip 20 and is attached to the surface of the male thread 23a of the nozzle tip 20, or the lead supply pipe ( It was not uncommon for the surface of the female thread (11) of 10) to be stained.

A plurality of nozzle tips 20 are provided with various outer diameters depending on the size of the position requiring soldering, and are selected to fit the soldering size and are attached and detached to the solder supply pipe 10.

However, when the molten lead (A) is hardened and attached to the female thread (11) and the male thread (23a), there is a problem in that the female thread (11) and the male thread (23a) are not accurately screwed together. If the screw connection is not performed accurately, the nozzle tip 20 may be loosely coupled to the lead supply pipe 10 or the coupling height may be incorrect.

In particular, when the nozzle tip 20 is square as shown in FIG. 1, the direction of the nozzle tip must exactly match the soldering position. However, if the screw connection is not correct, the direction of the nozzle tip 20 is not correct, causing damage to the surface. There was the inconvenience of having to clean the solder and then reassemble it or apply a lot of force to rotate it.

The purpose of the present invention is to solve the above-mentioned problem and to provide a nozzle assembly that allows stable nozzle exchange even if molten solder flows to the outside during the soldering process.

Another object of the present invention is to provide a nozzle assembly in which the direction can be adjusted by simply rotating the directional nozzle cap.

The above objects and various advantages of the present invention will become more apparent to those skilled in the art from preferred embodiments of the present invention.

The object of the present invention described above can be achieved by a nozzle assembly for selective soldering that is coupled to a lead supply pipe and sprays molten lead. The nozzle assembly for selective soldering of the present invention includes a nozzle bracket 110 screwed to the lead supply pipe 10; It is detachably coupled to the nozzle bracket 110 by magnetic force and includes a nozzle cap 120 that sprays molten lead, and the nozzle bracket 110 has an outer diameter corresponding to the outer diameter of the lead supply pipe 10. A bracket body 111 formed to have; a cap insertion pipe 113 that protrudes from the upper part of the bracket body 111 and is inserted into the nozzle cap 120 to supply molten lead to the nozzle cap 120; a supply pipe coupling pipe (115) protruding from the lower part of the bracket body (111) and screwed to the lead supply pipe (10); It is characterized by including a plurality of magnets 117 that are embedded in the plate surface of the bracket body 111 at regular angular intervals along the circumferential direction and apply magnetic force to the nozzle cap 120.

According to one embodiment, the bracket body 111 is provided in the form of a cylindrical tube, and the plate surface is provided with magnet receiving grooves 111b for receiving the magnets 117 at regular angular intervals in communication with the upper surface along the circumferential direction. The upper surface of the bracket body 111 extends by a certain size in the circumferential direction of the magnet receiving groove 111b to cover a portion of the upper surface of the magnet 117 accommodated in the magnet receiving groove 111b. ) A plurality of magnetic fixing coggings 111d that fix the position may be provided at regular intervals.

According to one embodiment, a plurality of magnet discharge pressure holes are formed on the lower surface of the bracket body 111 to communicate with the plurality of magnet accommodating grooves 111b and have an inner diameter smaller than the inner diameter of the magnet accommodating groove 111b ( 111c) may be provided.

According to one embodiment, the nozzle cap 120 includes a cap body 121 into which the cap insertion tube 113 is inserted; A discharge tip 123 is provided that extends from the upper part of the cap body 121 to discharge molten lead (A), and the bottom surface of the cap body 121 corresponds to the upper surface of the bracket body 111. It can be installed horizontally.

According to one embodiment, a nozzle tip magnet 127, which exerts an attractive force with the magnet 117, may be embedded in a ring shape on the bottom surface of the cap body 121.

The nozzle assembly for selective soldering according to the present invention separates the nozzle tip, which was conventionally screwed to the lead supply pipe, into two parts, a nozzle bracket and a nozzle cap, and the nozzle bracket and nozzle cap are equipped to be attached and detached by a magnet.

As a result, molten solder does not flow between the nozzle bracket and the nozzle cap, so it can be easily replaced with one touch using magnetic force. It has the advantage of always being able to be assembled in the same position regardless of the operator's skill level.

In addition, the nozzle cap, which requires direction because it rotates freely, has the advantage of being easy to replace and use.

Figure 1 is an example diagram showing the coupling structure of a conventional lead supply pipe and a nozzle tip;
Figure 2 is a perspective view showing the nozzle assembly according to the present invention coupled to the lead supply pipe;
Figures 3 and 4 are exploded perspective views showing the configuration of the nozzle assembly according to the present invention from different directions;
Figure 5 is a cross-sectional view showing the cross-sectional configuration of Figure 2;
Figure 6 is an illustration showing a modified example of the nozzle assembly according to the present invention;
7 is a view showing the configuration of various nozzle caps used in a nozzle assembly according to the present invention;
Figure 8 is an example diagram showing a process in which a nozzle assembly coupled with a square nozzle cap according to the present invention performs selective soldering;
Figure 9 is an exemplary diagram showing the process of coupling a square nozzle cap to the nozzle assembly according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

Figure 2 is a perspective view showing the nozzle assembly 100 according to the present invention coupled to the lead supply pipe 10, and Figures 3 and 4 show the configuration of the nozzle assembly 100 disassembled from different directions. It is an exploded perspective view, and Figure 5 is a cross-sectional view showing the cross-sectional configuration of the nozzle assembly 100 coupled to the lead supply pipe 10.

As shown, the nozzle assembly 100 according to the present invention includes a nozzle bracket 110 coupled to the lead supply pipe 10, and a nozzle cap 120 detachably coupled to the nozzle bracket 110.

The nozzle bracket 110 is screwed to the lead supply pipe 10, and the nozzle cap 120 is detachably coupled to the nozzle bracket 110 by magnetic force. As a result, it can be combined and compatible with the existing lead supply pipe 10, and various types of nozzle caps 120 are attached to the nozzle bracket 110 depending on the operator's skill level, regardless of whether molten lead (A) flows to the outside. It has the advantage of being able to be attached and detached quickly and reliably regardless.

As shown in FIGS. 3 and 4, the nozzle bracket 110 is coupled to the lead supply pipe 10 and supports different types of nozzle caps 120 so that they can be coupled. The nozzle bracket 110 has a bracket body 111 with a lead movement path 118 formed therein, and a protrusion formed on the upper part of the bracket body 111 in communication with the lead movement path 118 and is inserted into the nozzle cap 120. A cap insertion pipe (113), a supply pipe coupling pipe (115) that protrudes from the lower part of the bracket body (111) in communication with the lead movement path (118) and is coupled to the lead supply pipe (10), and a bracket body (111). It includes a plurality of magnets 117 that are accommodated in and apply magnetic force so that the nozzle cap 120 is coupled to the nozzle bracket 110.

The bracket body 111 is provided in the form of a cylindrical tube having an outer diameter corresponding to the outer diameter of the lead supply pipe 10. As a result, when the nozzle bracket 110 is coupled to the lead supply pipe 10 as shown in FIG. 2, a step does not occur in the boundary area between the nozzle bracket 110 and the lead supply pipe 10.

On the outer peripheral surface of the bracket body 111, a pair of lower tool engaging jaws 111a are formed as cutting surfaces in opposite directions. A pair of lower tool coupling jaws (111a) are coupled with tools to screw the bracket body (111) to the lead supply pipe (10). At this time, the lower tool engaging jaw 111a is provided in the form of a straight surface without curvature in order to engage the tool stably without slipping.

As shown in FIGS. 3 and 5, the bracket body 111 is provided with a plurality of magnet receiving grooves 111b recessed at a certain depth with respect to the plate surface along the circumferential direction. The magnet receiving groove 111b is provided with an open upper part in communication with the upper surface of the bracket body 111. A magnet 117 is accommodated in the magnet receiving groove 111b.

The magnet receiving groove (111b) is provided to correspond to the shape of the magnet (117). As shown, when the magnet 117 is in the shape of a cylinder, the magnet receiving groove (111b) is also provided in the shape of a cylinder, and if the magnet 117 is in the shape of a square pillar, the magnet receiving groove (111b) is also provided in the shape of a square pillar.

It is preferable that a plurality of magnet receiving grooves 111b are provided at narrow intervals so that a uniform magnetic force can be applied to the entire lower area of the nozzle cap 120. In some cases, when the magnet 117 has a ring shape, the magnet receiving groove 111b may be provided in a ring shape centered on the cap insertion tube 113.

As shown in FIG. 4, a plurality of magnet discharge pressure holes 111c are provided at the lower part of the bracket body 111 in communication with a plurality of magnet receiving grooves 111b. The magnet discharge pressure hole 111c is used to insert a tool (not shown) to discharge the magnet 117 accommodated in the magnet receiving groove 111b to the outside. When the magnet 117 needs to be discharged, the worker places a tool (not shown) at the bottom of the magnet discharge pressure hole 111c and applies force in the direction in which the magnet 117 is discharged to discharge the magnet 117.

The magnet discharge pressure hole (111c) is formed through and communicates with the magnet accommodating groove (111b) to have an inner diameter smaller than the inner diameter of the magnet accommodating groove (111b).

Meanwhile, the upper surface of the bracket body 111 forming the boundary area with the magnet receiving groove 111b is provided with a magnet fixing cogging 111d extending a certain area toward the magnet receiving groove 111b. The magnet fixing cogging (111d) is formed by pressing the upper surface of the bracket body (111) toward the upper part of the magnet (117) accommodated in the magnet receiving groove (111b).

As shown enlarged in FIG. 3, with respect to the inner diameter (R1) of the magnet receiving groove (111b), the magnet fixing cogging (111d) has a certain thickness (d) from the upper surface of the bracket body 111 toward the center of the magnet receiving groove (111b). ) and is formed as an extension. The gap between a pair of opposing magnet fixing coggings (111d) is smaller than the inner diameter (R1) of the magnet receiving groove (111b). As a result, the magnet 117 is blocked by the magnet fixing cogging 111d and cannot be discharged to the outside, and is fixed in the magnet receiving groove 111b.

The cap insertion pipe 113 is formed at a certain height on the upper part of the bracket body 111 to communicate with the lead movement path 118 and is inserted into the nozzle cap 120. As shown in FIG. 5, the cap insertion tube 113 is inserted into the nozzle cap 120 at a certain height and aligns the fixed position when the nozzle cap 120 is fixed by the magnetic force of the magnet 117. The nozzle cap 120 is fixed to the upper part of the bracket body 111 by magnetic force, so when only the lead movement path 118 is formed without the cap insertion pipe 113, the nozzle cap 120 is attached to the bracket body 111. Due to biased coupling, the lead movement path 118 and the lead discharge path 124 may be misaligned with each other.

To prevent this, the cap insertion pipe 113 protrudes at a certain height and is inserted into the lead discharge path 124 of the nozzle cap 120 to align the nozzle bracket 110 and the nozzle cap 120 on the same axis. The movement path 118 and the lead discharge path 124 are aligned.

The supply pipe coupling pipe 115 protrudes at a certain length from the lower part of the bracket body 111 in communication with the lead movement path 118 and is screwed to the female thread 11 of the lead supply pipe 10. As shown in FIG. 3, a male thread (23a) is formed on the outer peripheral surface of the supply pipe coupling pipe 115, allowing the bracket body 111 to be screwed to the conventional lead supply pipe 10.

The magnet 117 is received in the magnet receiving groove 111b of the bracket body 111 and applies magnetic force toward the nozzle cap 120. The magnet 117 used in the nozzle bracket 110 of the present invention is preferably a high-temperature special magnet that can be used without losing magnetism even at high temperatures.

Meanwhile, in the nozzle bracket 110 according to the present invention, the bracket body 111, the cap insertion pipe 113, and the supply pipe coupling pipe 115 are integrally formed of titanium. Titanium is light, has excellent strength, and has high surface tension. Accordingly, the molten lead (A) flowing down through the discharge tip 123 of the nozzle cap 120 does not adhere to the surface of the nozzle bracket 110, but flows in a spherical shape, causing lead to adhere to the surface like the conventional nozzle tip 20. Problems that arise can be prevented.

The nozzle cap 120 is magnetically coupled to the nozzle bracket 110, and discharges molten lead (A) supplied from the nozzle bracket 110 to the selective soldering position. As shown in FIGS. 3 and 4, the nozzle cap 120 has a cap body 121 in which the cap insertion pipe 113 of the nozzle bracket 110 is accommodated, and is installed at a certain height on the upper part of the cap body 121. It includes a discharge tip 123 that extends vertically and discharges molten lead (A) to the soldering position.

The cap body 121 is provided to have an outer diameter corresponding to the bracket body 111. The cap body 121 is generally provided in a hemispherical shape so that the user can easily hold it with his hand and easily couple it to the bracket body 111.

The central area of the cap body 121 is provided with a lead discharge path 124 penetrating from the bottom to the top of the discharge tip 123. As shown in FIG. 5, a cap insertion pipe 113 is inserted into the lower part of the lead discharge passage 124, and the molten lead (A) supplied from the cap insertion pipe 113 moves through the lead discharge passage 124. After that, it is discharged to the outside through the discharge tip (123).

The bottom of the cap body 121 is provided with a bracket engaging surface 125 formed horizontally. As shown in FIG. 4, the bracket coupling surface 125 is provided with a magnetic trench groove 126 in a ring shape concentric with the lead discharge path 124.

A nozzle tip magnet 127 is provided in a ring shape in the magnetic trench groove 126. The nozzle tip magnet 127 is accommodated at the bottom of the cap body 121, and when the nozzle cap 120 is coupled to the nozzle bracket 110 by magnetic force, it exerts an attractive force with the magnet 117 to create a stronger coupling force. The nozzle cap 120 is coupled. The magnet 117 and the nozzle tip magnet 127 are arranged in a direction in which attractive force can act on each other.

An upper cogging (125a) extends from the boundary area of the bracket coupling surface 125 and the magnet trench groove 126 to fix the position of the nozzle tip magnet 127.

The discharge tip 123 protrudes a certain length from the top of the cap body 121 and discharges the molten lead (A) to the soldering position. The discharge tip 123 has irregularities 123a formed on its outer peripheral surface to improve the flowability of the molten lead (A).

Here, the nozzle cap 120 according to a preferred embodiment of the present invention is provided with a magnet trench groove 126 in which the nozzle tip magnet 127 is coupled to the bracket coupling surface 125. However, the nozzle cap 120-1 may be provided with a flat bracket engaging surface 125 as shown in FIG. 6. That is, even without a separate nozzle tip magnet 127, the metal bracket coupling surface 125 may be detachably coupled to the nozzle bracket 110 by the magnetic force of the magnet 117.

Meanwhile, Figure 7 is an example diagram showing the shapes of various nozzle caps 120a, 120b, and 120c that can be coupled to the nozzle bracket 110.

Like the first nozzle cap 120a, the length of the discharge tip 123a may be formed on the top of the cap body 121a, and like the second nozzle cap 120b, the discharge tip may be formed on the top of the cap body 121b. (123b) may be provided in a square shape. Additionally, like the third nozzle cap 120c, the cap body 121c and the discharge tip 123c may not be separated and may be provided in a truncated cone shape.

In addition, the nozzle cap 120 may be provided with various shapes, lengths, and inner diameters within the range of being attachable to and detachable from the nozzle bracket 110 by magnetic force.

The process of using the nozzle assembly 100 for selective soldering according to the present invention having this configuration will be described with reference to FIGS. 2 to 7.

The operator selects a nozzle cap 120 suitable for selective soldering among a plurality of different types of nozzle caps 120, 120a, 120b, and 120c. Then, as shown in FIG. 3, the nozzle bracket 110 is coupled to the lead supply pipe 10.

Insert the supply pipe coupling pipe 115 of the nozzle bracket 110 into the lead supply pipe 10 and rotate it to screw the nozzle bracket 110 into the lead supply pipe 10. Then, the nozzle cap 120 is coupled to the upper part of the nozzle bracket 110.

The operator positions the nozzle cap 120 on the upper part of the nozzle bracket 110 and inserts the cap body 121 into the cap insertion pipe 113 so that the cap insertion pipe 113 is inserted into the lead discharge passage 124. At this time, as shown in FIG. 4, the nozzle tip magnet 127 contacts the upper surface of the bracket body 111, and the magnet 117 and the nozzle tip magnet 127 apply magnetic force to each other.

As shown in FIGS. 2 and 5, the nozzle cap 120 is fixed in position by being inserted into the nozzle bracket 110 with the cap insertion tube 113 as the center.

In this state, when molten lead (A) is supplied to the lead supply pipe (10), the molten lead (A) moves through the lead movement path (118) of the nozzle bracket (110) and then into the cap insertion pipe (113) and the lead is discharged. It is discharged to the outside through the discharge tip 123 via the furnace 124 and used for soldering.

The molten lead (A) additionally discharged during this process flows along the surface of the nozzle cap 120 and flows down the outer surface of the bracket body 111.

Since the upper surface of the bracket body 111 and the bracket coupling surface 125 are tightly coupled without lifting due to magnetic force, the flowing molten lead (A) does not flow between the bracket main body 111 and the bracket coupling surface 125.

Accordingly, after the discharge of the molten lead (A) is completed and the nozzle cap 120 is separated from the nozzle bracket 110, even if a different type of nozzle cap 120b is attached to the nozzle bracket 110, the molten lead (A) is combined. Since it is not attached to the surface, quick and stable replacement is possible.

As shown in FIG. 8, when the soldering position 40 is square, the use of the second nozzle cap 120c, where the nozzle tip 123c is square, is required.

At this time, as shown in FIG. 9, the second nozzle cap 120c is coupled to the nozzle bracket 110 by magnetic force. When the second nozzle cap 120 is moved to the upper part of the cap insertion pipe 113 of the nozzle bracket 110, the second nozzle cap 120c is attached and coupled to the upper surface of the nozzle bracket 110 in a one-touch manner by magnetic force.

Accordingly, since the process of rotating using a tool for screw coupling as in the past is omitted, coupling of the nozzle cap 120c can be simplified.

Meanwhile, as shown in (a) of FIG. 9, the second nozzle cap 120 having a square nozzle tip 123c is coupled to the nozzle bracket 110, and then moved to the soldering position as shown in FIG. 8. When the soldering position 40 and the direction of the square nozzle tip 123c do not match, the operator rotates the nozzle cap 120 to change the soldering position 40 and direction, as shown in (b) of FIG. It can be adjusted to fit.

The nozzle cap 120 of the present invention has the advantage of being able to freely rotate around the cap insertion tube 113 and thus be able to adjust its direction in a desired direction.

As seen above, the nozzle assembly for selective soldering according to the present invention separates the nozzle tip, which was previously screwed to the lead supply pipe, into two parts, a nozzle bracket and a nozzle cap, and the nozzle bracket and nozzle cap are equipped to be attached and detached by a magnet. .

As a result, molten solder does not flow between the nozzle bracket and the nozzle cap, so it can be easily replaced with one touch using magnetic force. It has the advantage of always being able to be assembled in the same position regardless of the operator's skill level.

In addition, the nozzle cap, which requires direction because it rotates freely, has the advantage of being easy to replace and use.

The embodiments of the nozzle assembly for selective soldering of the present invention described above are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. You will know better. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

10: lead supply pipe 11: female thread
20: nozzle tip 21: nozzle inlet
23: nozzle coupling end 23a: male thread
100: Selective soldering nozzle assembly 110: Nozzle bracket
111: Bracket body 111a: Lower tool coupling jaw
111b: Magnet receiving groove 111c: Magnet discharge pressure hole
111d: Magnetic fixed cogging 113: Cap insertion tube
115: supply pipe coupling pipe 115a: male thread
117: Magnet 118: Lead movement path
120,120a,120b,120c: nozzle cap 121: cap body
121a: Upper tool coupling jaw 123: Discharge tip
123a: Irregularity 124: Lead discharge path
125: Bracket coupling surface 125a: Upper cogging
126: Magnetic trench groove 127: Nozzle tip magnet
A: molten lead

Claims (5)

In the nozzle assembly for selective soldering that is coupled to a lead supply pipe and sprays molten lead,
A nozzle bracket 110 screwed to the lead supply pipe 10;
It includes a nozzle cap 120 that is detachably coupled to the nozzle bracket 110 by magnetic force and sprays molten lead,
The nozzle bracket 110 is,
a bracket body 111 formed to have an outer diameter corresponding to the outer diameter of the lead supply pipe 10;
a cap insertion pipe 113 that protrudes from the upper part of the bracket body 111 and is inserted into the nozzle cap 120 to supply molten lead to the nozzle cap 120;
a supply pipe coupling pipe (115) protruding from the lower part of the bracket body (111) and screwed to the lead supply pipe (10);
It includes a plurality of magnets 117 that are embedded in the plate surface of the bracket body 111 at regular angular intervals along the circumferential direction and apply magnetic force to the nozzle cap 120,
The bracket body 111 is provided in the form of a cylindrical tube,
Magnet receiving grooves 111b are provided on the plate surface to accommodate the magnets 117 at regular angular intervals in communication with the upper surface along the circumferential direction,
The upper surface of the bracket body 111 extends by a certain size in the circumferential direction of the magnet receiving groove 111b to cover a portion of the upper surface of the magnet 117 accommodated in the magnet receiving groove 111b. A plurality of magnetic fixing coggings (111d) that fix the position are provided at regular intervals,
The lower surface of the bracket body 111 is provided with a plurality of magnet discharge pressure holes 111c formed through the plurality of magnet receiving grooves 111b to have an inner diameter smaller than the inner diameter of the magnet receiving groove 111b. A nozzle assembly for selective soldering.
delete delete According to paragraph 1,
The nozzle cap 120 includes a cap body 121 into which the cap insertion tube 113 is inserted;
A discharge tip 123 is provided that extends from the top of the cap body 121 to discharge molten lead (A),
A nozzle assembly for selective soldering, characterized in that the bottom surface of the cap body 121 is provided horizontally to correspond to the upper surface of the bracket body 111.
According to clause 4,
A nozzle assembly for selective soldering, characterized in that a nozzle tip magnet 127, which exerts an attractive force with the magnet 117, is embedded in the bottom surface of the cap body 121 in a ring shape.

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