KR102585335B1 - Nozzle bracket for selective soldering - Google Patents

Abstract

The present invention relates to a nozzle assembly for selective soldering. The nozzle assembly includes: a circular pipe-shaped bracket body (111) formed with an outer diameter corresponding to the outer diameter of a lead supply pipe (10), and having a lead transfer passage (118) penetrated therein; a cap insertion pipe (113) protruding from an upper part of the bracket body (111) to communicate with the lead transfer passage (118) and inserted into a nozzle cap (120), and supplying melt lead to the nozzle cap (120); a supply pipe coupling pipe (115) protruding from a lower part of the bracket body (111) to communicate with the lead transfer passage (118) and 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 bracket for selective soldering}

The present invention relates to a nozzle bracket, and more specifically to a nozzle bracket 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 addition, there was a problem that the bonding height varied depending on the operator's skill level, causing a difference in soldering quality.

The purpose of the present invention is to solve the above-mentioned problem and to provide a nozzle bracket that can quickly and accurately perform nozzle cap replacement even if molten solder flows to the surface during the soldering process.

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 can be achieved by a nozzle assembly for selective soldering. The nozzle assembly of the present invention includes a bracket body 111 in the shape of a circular tube formed to have an outer diameter corresponding to the outer diameter of the lead supply pipe 10 and having a lead movement path 118 formed therethrough; A cap insertion pipe 113 is formed on the upper part of the bracket body 111 to protrude in communication with the lead movement path 118 and is inserted into the nozzle cap 120, and supplies molten lead to the nozzle cap 120. class; a supply pipe coupling pipe (115) protruding from the lower part of the bracket body (111) in communication with the lead movement path (118) 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 with a plurality of magnet receiving grooves 111b in which the magnets 117 are received at regular angular intervals in communication with the upper surface along the circumferential direction on the plate surface, and the bracket body 111 (111) extends a certain area in the boundary area with the magnet receiving groove (111b) toward the center of the magnet receiving groove (111b) and forms a portion of the upper surface of the magnet 117 accommodated in the magnet receiving groove (111b). A plurality of magnet fixing coggings 111d that cover and fix the position of the magnet 117 may be provided.

According to one embodiment, a plurality of magnet discharge pressure holes 111c 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. ) may be provided.

The nozzle bracket for selective soldering according to the present invention supports the nozzle cap so that it can be detachably coupled by the magnetic force of a magnet.

As a result, molten solder does not flow between the nozzle bracket and the nozzle cap, making it possible to easily replace the nozzle cap with one touch using magnetic force. There is an advantage that the nozzle cap can always be assembled in the same position regardless of the operator's skill level.

Figure 1 is an example diagram showing the process of coupling a nozzle tip to a conventional lead supply pipe;
Figure 2 is an example diagram showing a state in which a nozzle cap is coupled to a nozzle bracket according to the present invention;
Figure 3 is an example diagram showing the process of coupling various types of nozzle caps to the nozzle bracket according to the present invention;
Figure 4 is a perspective view showing the configuration of the nozzle bracket according to the present invention;
Figure 5 is a cross-sectional view showing the cross-sectional configuration of the nozzle bracket 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 bracket 110 according to the present invention coupled to the nozzle cap 120 and the lead supply pipe 10, and Figure 3 shows the nozzle bracket 110 with various types of nozzle caps 120. ) This is an example diagram showing the process of combining.

As shown, the nozzle bracket 110 according to the present invention is used to supply molten lead (A) to the soldering position for selective soldering. The nozzle bracket 110 is combined with the nozzle cap 120 to form the nozzle assembly 100. The nozzle assembly 100 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. The nozzle bracket 110 of the present invention can be compatible and combined with the existing lead supply pipe 10, and can be used in various types of nozzle caps (120, 120a, 120b, 120c) regardless of whether the molten lead (A) flows to the outside. ) is supported so that it can be quickly and reliably attached and replaced regardless of the operator's skill level.

Figure 4 (a) is a perspective view showing the configuration of the nozzle bracket 110, Figure 4 (b) is a bottom perspective view showing the lower structure of the nozzle bracket 110, and Figure 5 is a nozzle bracket 110. This is a side cross-sectional view showing the side cross-sectional configuration.

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 combined. 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 (a) of Figure 4, the bracket body 111 is provided with a plurality of magnet receiving grooves 111b along the circumferential direction to be recessed at a certain depth with respect to the plate surface. 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 and size 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 pipe 113.

As shown in (b) of 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 Figure 4 (a) and Figure 5, the magnet fixing cogging (111d) is connected to the inner diameter (R1) of the magnet receiving groove (111b) from the upper surface of the bracket body (111) to the magnet receiving groove (111b). It is formed to extend toward the center with a certain thickness (d).

The gap (R2) 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, male threads 115a are 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 FIG. 2, the nozzle cap 120 extends vertically at a certain height to the cap body 121 in which the cap insertion pipe 113 of the nozzle bracket 110 is accommodated, and to the upper part of the cap body 121. It includes a discharge tip 123 that discharges molten lead (A) to the soldering position.

The bottom surface of the cap body 121 is formed flat and is tightly coupled to the upper part of the nozzle bracket 110 by the magnetic force of the nozzle bracket 110. There are various types of nozzle caps (120a, 120b, 120c) as shown in FIG. 3, and the operator selects the one corresponding to the selective soldering position among the various types of nozzle caps (120a, 120b, 120c) and attaches the nozzle bracket (110). ) is used in conjunction with .

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, the bottom surface of the nozzle cap 120 contacts the upper surface of the bracket body 111 and is coupled by receiving magnetic force from the magnet 117. The nozzle cap 120 is inserted into the nozzle bracket 110 with the cap insertion pipe 113 as the center, and the nozzle assembly 100 is completely coupled as shown in FIG. 2.

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 nozzle cap 120 are tightly coupled without lifting due to magnetic force, the flowing molten lead (A) does not flow between the bracket body 111 and the bracket coupling surface 125.

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

As discussed above, the nozzle bracket for selective soldering according to the present invention supports the nozzle cap so that it can be detachably coupled by the magnetic force of 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.

The embodiments of the nozzle bracket for selective soldering of the present invention described above are merely exemplary, and those skilled in the art will recognize 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
124: Lead discharge path
A: molten lead

Claims (3)

A bracket body 111 in the shape of a circular tube formed to have an outer diameter corresponding to the outer diameter of the lead supply pipe 10 and having a lead movement path 118 formed therethrough;
A cap insertion pipe 113 is formed on the upper part of the bracket body 111 to protrude in communication with the lead movement path 118 and is inserted into the nozzle cap 120, and supplies molten lead to the nozzle cap 120. class;
a supply pipe coupling pipe (115) protruding from the lower part of the bracket body (111) in communication with the lead movement path (118) 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 with a plurality of magnet receiving grooves 111b in which the magnets 117 are accommodated at regular angular intervals in communication with the upper surface along the circumferential direction on the plate surface,
The bracket body 111 extends a certain area in the boundary area with the magnet receiving groove 111b toward the center of the magnet receiving groove 111b, so that the magnet 117 accommodated in the magnet receiving groove 111b A plurality of magnet fixing coggings 111d are provided to cover a portion of the upper surface and fix the position of the magnet 117,
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. Features a nozzle bracket for selective soldering.
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