JP4091833B2 - Soldering flux remover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a soldering flux removing apparatus that removes flux from an atmosphere containing flux generated from a workpiece.
[0002]
[Prior art]
  Conventionally, as this kind of soldering flux removal device, the atmosphere in the work cooling device main body is circulated in the work cooling device main body on both sides of the work cooling device main body provided on the work take-out side such as a reflow furnace. A sirocco fan is provided, and a nozzle that blows the atmosphere circulated by the sirocco fan on the upper surface of the work is provided at the upper part in the work cooling device main body, and both sides of the conveyor that conveys the work in the work cooling device main body In addition, a configuration is known in which a cooling coil is provided that is cooled by contact when the atmosphere sprayed on the workpiece circulates (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
          Japanese Patent Laid-Open No. 7-249859 (page 3, FIG. 1)
[0004]
[Problems to be solved by the invention]
  However, in the above-described soldering flux removal apparatus, since the flux is liquefied only by the cooling coil, the flux removal efficiency is not good, for example, the flux separation from the atmosphere containing the flux is not reliable, and the work cooling apparatus main body There is a problem that it is not easy to remove the flux solidified on the inner wall.
[0005]
  The present invention has been made in view of these points, and an object thereof is to provide a soldering flux removing device with improved flux removal efficiency. Moreover, the soldering flux can easily remove the solidified flux. The object is to provide an apparatus.
[0006]
[Means for Solving the Problems]
  The invention described in claim 1 includes a suction air passage forcibly sucking in an atmosphere containing flux generated from a soldered workpiece, and a flux mixed in the atmosphere by cooling the atmosphere sucked into the suction air passage. A cooling means for mist formation, and a flux removal means for separating and removing the flux mist generated by the cooling means from the atmosphere.The flux removing means includes a first metal filter that separates the flux mist generated by the cooling means from the atmosphere, and a second resin resin that separates the fine particles of the flux that has passed through the first filter from the atmosphere. The filter is connected to the cooling means, accommodates the first filter and the second filter, and is removed from the cooling means side so as to expand to the first filter and the second filter side. With storageThis is a soldering flux removal device that forcibly sucks the atmosphere containing the flux generated from the soldered workpiece into the suction air passage, cools this atmosphere with the cooling means, and mists the flux mixed in the atmosphere. This mist flux afterIs diffused to the whole of the first filter and the second filter side by the removal accommodating portion, and the mist flux is separated from the atmosphere by the metal first filter, and then the first filter By separating the fine particles of the flux that has passed through the filter from the atmosphere with a second filter made of resin, the atmosphere can be filtered in a wide area with each filter by the atmosphere diffused by the removal accommodating portion. For example, a single filter The flux removal efficiency is further improved compared to the case where the flux is separated by the filter, and the atmosphere can be filtered in a wide area by each filter by the atmosphere diffused by the removal accommodating portion, and each filter is not easily clogged.
[0007]
  According to a second aspect of the present invention, the suction air passage according to the first aspect is connected to a work cooling chamber for cooling a work, connected to a flux removing means, and a circulation means for forcibly circulating the atmosphere to the suction work cooling chamber. The soldering flux removing device is equipped with, forcibly sucking the atmosphere in the workpiece cooling chamber by the suction air passage, removing the flux by the flux removing device, and then circulating it to the workpiece cooling chamber by the circulating device. It is possible to prevent the atmosphere mixed with the flux from being released to the outside.
[0008]
  According to a third aspect of the present invention, in the soldering flux removing apparatus according to the first or second aspect, the heating means for dissolving the solidified flux that has been cooled by the cooling means; A flux removing device for soldering comprising a flux collecting unit for collecting flux, wherein the flux cooled and solidified by the cooling means is dissolved in the liquid by the heating means, and the flux that is dissolved and falls by its own weight is collected by the flux. By collecting at the part, the flux is easily and efficiently recovered.
[0009]
  According to a fourth aspect of the present invention, the cooling means according to any one of the first to third aspects is provided from the outside to the inside of the housing portion communicating with the suction air passage, and meandering within the housing portion And a soldering flux removing device including a cooling pipe through which a cooling fluid passes and a fin provided across the cooling pipe inside the housing portion, and outside the housing portion communicated with the suction air passage From the inside to the inside, a cooling pipe through which the cooling fluid passes is provided meandering in the accommodating part, and by providing the fin over the cooling pipe, the heat of the atmosphere in the accommodating part is absorbed by the fin and passes through the cooling pipe. Since this heat is conveyed to the outside of the housing portion by the cooling fluid and is forcibly dissipated, it is possible to obtain good cooling efficiency.
[0010]
  According to a fifth aspect of the present invention, the cooling means according to any one of the first to third aspects is provided in the interior of the accommodating portion communicated with the suction air passage, and cools the atmosphere while in the atmosphere. An internal radiating fin that mists the mixed flux inside the accommodating portion and adheres to the inside of the accommodating portion, and is provided thermally outside the accommodating radiating fin and provided outside the accommodating portion. It is a soldering flux removal device that has an external heat radiation fin that cools the inside of the housing by exchanging heat, and a fan that cools the external heat radiation fin, and cools the atmosphere that is forcibly sucked into the suction air passage In addition, internal heat radiation fins that mist the flux mixed in the atmosphere and attach it to the inside of the housing part are provided inside the housing part, and heat inside the housing part is exchanged to exchange the heat inside the housing part. Cooling The heat radiation fin is thermally connected to the internal heat radiation fin and provided outside the housing part, and the external heat radiation fin is cooled by a fan so that the heat of the atmosphere in the housing part is absorbed by the internal heat radiation fin. It is possible to obtain good cooling efficiency by forcibly radiating heat to the outside of the housing portion with the fins.
[0011]
  According to a sixth aspect of the present invention, the cooling means according to any one of the first to third aspects communicates with the suction air passage, and has a ventilation portion provided with a plurality of branch air passages therein, and outside the ventilation portion. A soldering flux removing device provided with an external fin for exchanging heat between the outside and the inside of the ventilation part and an air cooling fan for cooling the external fin, and inside the ventilation part communicated with the suction air passage Provided with a plurality of branch air passages, external fins for exchanging heat between the outside and the inside of the ventilation portion provided outside the ventilation portion, and cooling of the external fins with an air cooling fan, through the external fins from the ventilation portion. It is possible to obtain good cooling efficiency by forcibly releasing heat into the atmosphere..
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described with reference to the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, and FIG. This will be described in detail with reference to the fourth embodiment shown in FIG.
[0013]
  FIG. 2 shows a reflow apparatus. The reflow apparatus includes a reflow furnace main body 1 for performing reflow soldering processing on the workpiece W, and a soldering cooling device 2 is disposed on the work extraction side of the reflow furnace main body 1. ing.
[0014]
  The workpiece W is an electronic component mounted on a printed wiring board via a solder paste, and is conveyed along an elongated rectangular conveyor that penetrates the reflow furnace body 1. The solder paste contains solder particles and flux particles.
[0015]
  In the reflow furnace body 1, a heater (not shown) for heating the workpiece W is disposed along the conveyor, and the workpiece W is sequentially heated to the preheat temperature and the reflow temperature.
[0016]
  The soldering cooling device 2 includes a work cooling device main body 3 having a substantially rectangular box shape in which a rail R including a work transfer line C is penetrated in the front-rear direction.
[0017]
  A workpiece cooling chamber 4 in which a fan (not shown) is rotatably mounted is provided in the workpiece cooling device main body 3, and the workpiece W is rotated in the workpiece cooling chamber 4 by rotating the fan by the upper motor M1. The work W is cooled by blowing cold air on the surface.
[0018]
  Below the work cooling chamber 4, a separate type removal unit 6 as a soldering flux removal device having a suction air passage 5 is provided in communication.
[0019]
  The suction air passage 5 connects the work cooling chamber 4 and the unit main body 7 of the removal unit 6 in communication.
[0020]
  Further, as shown in FIG. 1, the unit main body 7 is provided with a cooling means 11, a flux removing means 12 and a circulating means 13.
[0021]
  The cooling means 11 includes a substantially rectangular accommodating portion 14. The accommodating portion 14 is provided in the vertical direction, and the upper side communicates with the suction air passage 5.
[0022]
  A water-cooled radiator 15 is provided inside the housing portion 14 from a position closer to the upper side to a position closer to the lower side inside the housing portion 14. The water-cooled radiator 15 includes a cooling pipe 16 as a cooling pipe introduced from the outside of the housing portion 14 into the housing portion 14. The cooling pipe 16 is provided meandering throughout the entire width direction of the accommodating portion 14 in the accommodating portion 14, and cold water as a cooling fluid passes through the inside thereof.
[0023]
  The cooling pipe 16 is provided with a plurality of cooling fins 17 over the entire vertical direction. These fins 17 are spaced apart from each other at substantially equal intervals in the width direction of the accommodating portion 14.
[0024]
  A lower flux collection tray 21 (hereinafter, referred to as a lower tray 21) as a flux collection body is installed at the lower end in the housing portion. The lower part of the lower tray 21 of the accommodating portion 14 is a reduced diameter portion 22 that is reduced in diameter downward, and the central region of the reduced diameter portion 22 communicates with the outside of the accommodating portion 14. A discharge pipe 23 is provided integrally. The discharge pipe 23 is provided with a drain valve 24 that opens and closes the discharge pipe 23. The lower tray 21, the reduced diameter portion 22, the discharge pipe 23, and the drain valve 24 constitute a flux recovery unit 25.
[0025]
  A heater 31 as a heating means for melting the solidified flux is provided on the side opposite to the introduction and lead-out side of the cooling pipe 16 that is the outer part on the upper side of the housing part 14. The heater 31 has, for example, a coiled heating wire 32 inside.
[0026]
  At a position slightly below the water-cooled radiator 15 and a position slightly above the lower tray 21 on the side portion of the accommodating portion 14, a communicating portion 33 is provided integrally so as to protrude laterally.
[0027]
  On the other hand, the flux removal means 12 includes a flux removal accommodation portion 34 (hereinafter referred to as a removal accommodation portion 34) communicated with the cooling means 11 via the communication portion 33. The removal accommodating portion 34 is formed in an expanding shape in a direction away from the communication portion 33 in the axial direction of the communication portion 33.
[0028]
  In the removal accommodating part 34, the metal mesh 35 as a 1st filter and the resin mesh 36 as a 2nd filter are provided in order from the communication part 33 side. The metal mesh 35 is relatively coarse and the resin mesh 36 is finer than the metal mesh 35. The metal mesh 35 and the resin mesh 36 are respectively provided by cutting the inside of the removal accommodating portion 34.
[0029]
  Further, the circulation means 13 includes a fan accommodating portion 37 provided adjacent to an end of the removal accommodating portion 34 on the side opposite to the accommodating portion 14.
[0030]
  An opening 38 is formed in the central region of the side opposite to the communicating portion 33 of the removal accommodating portion 34 between the removal accommodating portion 34 and the fan accommodating portion 37. The removal accommodating portion 34 and the fan accommodating portion 37 are communicated with each other.
[0031]
  A circulation fan 41 is rotatably provided in the fan housing portion 37. The circulation fan 41 is a sirocco fan, has an axial direction in the left-right direction, and is rotationally driven by a motor M2.
[0032]
  A return air passage 42 is communicated with the upper portion of the fan accommodating portion 37. The return air passage 42 communicates with the lower part of the work cooling chamber 4.
[0033]
  Therefore, the circulation means 13 includes a circulation fan 41, a motor M2, and a return air passage 42, and the upstream side is connected to the flux removing means 12 and the downstream side is connected to the work cooling chamber 4 in communication.
[0034]
  Next, the operation of the embodiment shown in FIGS. 1 and 2 will be described.
[0035]
  Cooling air is blown to the workpiece W by the fan driven to rotate by the upper motor M1, and the atmosphere in which the flux generated from the workpiece W is mixed and the temperature rises is moved into the suction air passage 5 by the rotational driving of the circulation fan 41. Forced to be sucked.
[0036]
  The atmosphere sucked into the suction air passage 5 flows into the unit main body 7 of the removal unit 6 and merges, and flows into the accommodating portion 14 of the cooling means 11.
[0037]
  At this time, the atmosphere that has flowed into the housing part 14 is absorbed by the fins 17 by coming into contact with the fins 17, and the heat absorbed by the fins 17 is received by the cold water passing through the cooling pipe 16. It is forcibly transported to the outside.
[0038]
  As a result, the heat of the atmosphere flowing into the accommodating portion 14 is forcibly moved and cooled, and the flux mixed in this atmosphere is misted and passes through the fins 17 or is liquefied on the surface of the fins 17. .
[0039]
  Mistized flux (hereinafter referred to as “flux mist”) and a part of the liquefied flux adhere to the inner wall of the accommodating portion 14, the surfaces of the cooling pipe 16 and the fin 17, fall down by their own weight, and accumulate in the lower tray 21. Alternatively, it moves to the lower part of the accommodating part 14, flows into the discharge pipe 23 along the inclination of the reduced diameter part 22, and is drained from the accommodating part 14 to the outside by opening the drain valve 24.
[0040]
  Therefore, a part of the flux mist is recovered by the flux recovery unit 25.
[0041]
  Furthermore, a part of the flux mist rides in the atmosphere that is cooled by the water-cooled radiator 15 and becomes cold air, and flows into the removal accommodating portion 34 through the communication portion 33.
[0042]
  The flux mist that has flowed into the removal container 34 is diffused over the entire metal mesh 35 along the spread-out removal container 34, and is absorbed by the metal mesh 35 when passing through the metal mesh 35, thereby causing cold air to flow. It is removed from the atmosphere.
[0043]
  Further, the fine particles of the flux that have passed through the metal mesh 35 without being adsorbed by the metal mesh 35 are removed from the atmosphere that is adsorbed by the resin mesh 36 and becomes cold air.
[0044]
  That is, a part of the flux mist is removed from the atmosphere that has become cold air by the flux removing means 12.
[0045]
  Then, the atmosphere that has passed through the resin mesh 36 to remove the flux and became cold air flows into the fan accommodating portion 37 through the opening 38, and is returned to the return air passage by the circulation fan 41 that is rotationally driven by the motor M2. It is circulated through the work cooling chamber 4 through 42.
[0046]
  Therefore, the atmosphere is circulated into the work cooling chamber 4 by the circulation means 13.
[0047]
  The atmosphere that has become cold air circulated into the workpiece cooling chamber 4 is blown to the lower side of the workpiece W.
[0048]
  On the other hand, the flux solidified by adhering to the inner wall of the housing portion 14 is periodically dissolved by the heat generated by the heating wire 32 of the heater 31 in a state where the operation of the soldering cooling device 2 or the like is stopped and becomes liquid. And falls in its own weight and collects in the lower tray 21, or flows into the discharge pipe 23 along the reduced diameter portion 22 at the lower part of the storage section 14, and the discharge pipe 23 is opened by the drain valve 24, and the storage section 14 It is drained from.
[0049]
  Therefore, the solidified flux is recovered by the flux recovery unit 25.
[0050]
  Next, effects of the embodiment shown in FIGS. 1 and 2 are listed.
[0051]
  The flux containing the flux generated from the soldered workpiece W is forcibly sucked into the suction air passage 5, the atmosphere is cooled by the cooling means 11, and the flux mixed in the atmosphere is misted. The flux removal efficiency can be improved by separating and removing the mist from the atmosphere by the flux removing means 12.
[0052]
  The atmosphere in the work cooling chamber 4 is forcibly sucked by the suction air passage 5 and the flux is removed by the flux removing means 12 and then circulated to the work cooling chamber 4 by the circulating means 13 so that the flux is mixed. Can be prevented from being released to the outside.
[0053]
  The flux that has been cooled and solidified by the cooling means 11 is periodically dissolved in a liquid form at the heating wire 32 of the heater 31, and the flux that is melted and falls by its own weight is removed by the flux collecting section 25 such as the lower tray 21 and the discharge pipe 23. The flux can be easily and efficiently recovered by collecting at the above.
[0054]
  The cooling pipe 16 through which the cold water passes is provided to meander from the outside to the inside of the housing portion 14 inside the housing portion 14, and the fin 17 is provided over the entire vertical direction of the cooling pipe 16, so that it is accommodated by the fin 17. Good cooling because it absorbs the heat of the atmosphere in the part 14 and transports the heat absorbed by the fins 17 to the outside of the accommodating part 14 by the cold water passing through the cooling pipe 16 to move the heat forcibly. In addition to the efficiency, the cooling pipe 16 and the fins 17 can surely cool the atmosphere in the accommodating portion 14 to more reliably mist the flux mixed in the atmosphere.
[0055]
  After the flux misted by the cooling means 11 is separated from the atmosphere by the metal mesh 35, the fine particles of the flux that has passed through the metal mesh 35 are separated from the atmosphere by the resin mesh 36 that is finer than the metal mesh 35. Thus, for example, the flux removal efficiency can be further improved as compared with the case where the flux is separated by a single filter. Further, since the flux mist having relatively large particles is removed by the metal mesh 35 and the fine particles of flux having relatively small particles are respectively removed by the resin mesh 36, the metal mesh 35 and the resin mesh 36 are not easily clogged.
[0056]
  Since the flux collection unit 25 is provided below the water-cooled radiator 15 in the housing unit 14, the flux that is cooled by the water-cooled radiator 15 and falls by its own weight can be collected more efficiently.
[0057]
  Since the removal accommodating portion 34 is formed in an expanded shape in a direction away from the communication portion 33, the atmosphere flowing into the removal accommodating portion 34 through the communication portion 33 is diffused throughout the metal mesh 35 and the resin mesh 36. The atmosphere can be filtered over a wider area, and the removal efficiency of flux mist and fine particles of flux can be further improved.
[0058]
  Since the circulation means 13 is provided on the rear side of the resin mesh 36, the atmosphere from which the flux has been removed flows into the circulation fan 41 of the circulation means 13, so that the flux can be prevented from adhering to the circulation fan 41. Can protect 13.
[0059]
  Next, a second embodiment of the soldering flux removing apparatus will be described with reference to FIG. Parts similar to those of the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.
[0060]
  A plurality of internal radiating fins 51 are provided in the accommodating portion 14 of the cooling means 11. These internal radiating fins 51 are provided so as to protrude into the accommodating portion 14 from the side portion of the accommodating portion 14 opposite to the heater 31 and have a longitudinal direction in the vertical direction.
[0061]
  A plurality of external heat radiating fins for exchanging heat between the outside and the inside of the housing portion 14 are provided on the side of the housing portion 14 opposite to the heater 31, that is, on the outside of the housing portion 14 on the same side as the internal heat radiation fin 51. 52 is provided. These external heat radiating fins 52 are thermally connected to the internal heat radiating fins 51 and have, for example, a larger vertical dimension than the internal heat radiating fins 51.
[0062]
  A fan 53 that cools the external heat radiation fin 52 is provided on the side of the external heat radiation fin 52 so as to face the external heat radiation fin 52.
[0063]
  Next, the function and effect of the embodiment shown in FIG. 3 will be described.
[0064]
  The atmosphere sucked into the accommodating portion 14 via the suction air passage 5 comes into contact with the surface of the internal radiating fin 51, and heat is absorbed by the internal radiating fin 51.
[0065]
  The heat absorbed by the internal heat radiating fins 51 is transmitted to the external heat radiating fins 52, and the external heat radiating fins 52 are forced to move into the atmosphere by blowing wind on the fan 53.
[0066]
  The cooled atmosphere in the accommodating portion 14 becomes cold air, and the flux mixed in the atmosphere is misted or liquefied on the surface of the internal radiating fins 51.
[0067]
  The flux mist and the liquefied flux are removed and collected from the atmosphere by the same action as that of the embodiment shown in FIGS. 1 and 2, and the atmosphere, which is cooled by removing the flux, is returned by the circulation means 13. It is circulated from the path 42 into the work cooling chamber 4.
[0068]
  For this reason, it is possible to obtain good cooling efficiency with the cooling means 11, and to reliably mist the flux mixed in the atmosphere.
[0069]
  Next, a third embodiment of the soldering flux removing apparatus will be described with reference to FIG. Parts similar to those of the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.
[0070]
  A ventilation portion 62 of an air-cooled radiator 61 is communicated with the suction air passage 5. In the ventilation portion 62, a plurality of, for example, two partition walls 63 are provided in the vertical direction and are separated from each other in the width direction of the ventilation portion 62. Between the partition wall 63 and the inner wall of the ventilation portion 62, a plurality of For example, three branch air passages 64 are formed. In addition, external fins 65 are provided around the entire periphery of the ventilation portion 62. On the side of the air-cooling radiator 61, an air-cooling fan 66 that cools the external fins 65 is provided to face the external fins 65.
[0071]
  The downstream side of the air-cooled radiator 61 is reduced in diameter and communicated with the flux solidifying chamber 67. On the side of the flux solidifying chamber 67, heaters 31a are provided at a plurality of locations.
[0072]
  A flux recovery unit 25a is provided in the lower part of the flux solidifying chamber 67. That is, the lower tray 21a is installed in the lower part in the flux solidifying chamber 67, and the lower part of the flux solidifying chamber 67 is a reduced diameter portion 22a that is reduced in diameter downward. Further, a discharge pipe 23a is integrally provided in the central region of the lower end portion of the reduced diameter portion 22a, and a drain valve 24a for opening and closing the discharge pipe 23a is attached to the discharge pipe 23a. Further, the lower side in the flux solidifying chamber 67 is communicated with the removal accommodating portion 34 via the communicating portion 33a.
[0073]
  Next, the operation of the embodiment shown in FIG. 4 will be described.
[0074]
  The atmosphere sucked into the ventilation portion 62 of the air-cooled radiator 61 through the suction air passage 5 is branched by the partition walls 63 and flows into the branch air passages 64.
[0075]
  At this time, the heat inside each branch air passage 64 of the ventilation portion 62 is forcibly transferred to the atmosphere through the external fin 65 by the external fin 65 cooled by the air cooling fan 66, and the inside of each branch air passage 64 Is cooled. Therefore, the atmosphere passing through each branch air passage 64 is cooled to become cold air, and the flux mixed in this atmosphere is mist or liquefied.
[0076]
  The atmosphere that has become cold air flows from the air-cooled radiator 61 into the flux solidifying chamber 67, and the flux mist adheres to the inner wall of the flux solidifying chamber 67 and falls by its own weight, and is collected in the lower tray 21a or the discharge pipe. It is drained from the flux solidifying chamber 67 from 23a and collected by the flux collecting section 25a.
[0077]
  The flux liquefied in the ventilation part 62 is collected by the flux recovery part 25a along the inner wall of the ventilation part 62 and the inner wall of the flux solidification chamber 67.
[0078]
  Then, the atmosphere containing the flux mist flows into the removal accommodating portion 34 from the communication portion 33, the flux is removed by the flux removing means 12, and is circulated into the work cooling chamber 4 by the circulation means 13.
[0079]
  On the other hand, the flux that has adhered and solidified on the inner wall of the flux solidifying chamber 67 is periodically dissolved by each heater 31 to become a liquid, falls down along the inner wall of the flux solidifying chamber 67, and is collected by the flux collecting unit 25a. Is done.
[0080]
  Next, effects of the embodiment shown in FIG. 4 will be listed.
[0081]
  A plurality of branch air passages 64 are provided inside the ventilation portion 62 communicated with the suction air passage 5, and external fins 65 for exchanging heat between the outside and the inside of the ventilation portion 62 are provided outside the ventilation portion 62. By cooling the external fins 65 with the air cooling fan 66, heat can be forcibly transferred from the vent 62 to the atmosphere through the external fins 65, and good cooling efficiency can be obtained. Can be reliably misted.
[0082]
  The flux solidification chamber 67 is separately provided on the downstream side of the air cooling radiator 61, and the heaters 31a are provided at a plurality of positions on the side of the flux solidification chamber 67, so that the flux adhered and solidified on the inner wall of the flux solidification chamber 67 can be obtained. The heater 31a can be reliably dissolved and recovered, the flux recovery efficiency can be further improved, and the air-cooled radiator 61 and the flux solidifying chamber 67 can be maintained separately, facilitating maintenance.
[0083]
  Since the external fin 65 is provided outside the ventilation part 62, the atmosphere mixed with the flux does not directly contact the external fin 65, so that the flux does not adhere to the external fin 65 and the air-cooled radiator 61 can be maintained more easily. .
[0084]
  Next, a fourth embodiment of the soldering flux removing apparatus will be described with reference to FIG. Parts similar to those of the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.
[0085]
  The heater 31b is provided so as to be introduced from the outside to the inside of the heater accommodating portion 71. The heater accommodating portion 71 is communicated with a blower (not shown) through a vent pipe 72.
[0086]
  A thermostat 73 as hot air control means is provided on the downstream side of the heater housing 71. The thermostat 73 controls the temperature of the hot air flowing out from the heater accommodating portion 71.
[0087]
  The downstream side of the thermostat 73 and the downstream side of the accommodating portion 14 merge with each other via a switching valve 74 as switching means, and are connected to the centrifuge 75 via a communication portion 33b.
[0088]
  The switching valve 74 can be switched so that only one of the accommodating portion 14 and the heater accommodating portion 71 is communicated with the communicating portion 33b.
[0089]
  The centrifuge 75 is a so-called cyclone separator, and has a substantially cylindrical cyclone outer periphery 76 and a substantially cylindrical cyclone inner periphery provided so as to protrude downward from the central region on the upper side of the cyclone outer periphery 76. The portion 77 is formed into a double tubular shape. The communication portion 33b is provided toward the tangential direction of the inner wall of the cyclone outer peripheral portion 76.
[0090]
  A filter 81 for protecting the circulation fan 41 is provided at a position closer to the upper side in the cyclone inner peripheral portion 77. The filter 81 is provided across the inside of the cyclone inner peripheral portion 77.
[0091]
  The cyclone inner peripheral portion 77 has a diameter that is lower than the position where the filter 81 is attached, and the lower end portion is bent outward and upward. In the lower end portion, a discharge hole (not shown) for dropping the flux is provided penetrating in the vertical direction.
[0092]
  A portion of the cyclone outer peripheral portion 76 that is lower than the cyclone inner peripheral portion 77 is reduced in diameter downward, and a substantially rectangular tray accommodating portion 82 is integrally provided at the lower end portion of the cyclone outer peripheral portion 76. It has been. The tray accommodating portion 82 is provided with a flux collecting portion 25b. That is, a plurality of lower trays 21b are arranged side by side in the tray accommodating portion 82. In addition, a discharge pipe 23b and a drain valve 24b are provided in a substantially central region below the tray accommodating portion 82.
[0093]
  The upper part of the cyclone inner peripheral part 77 is communicated with the fan housing part 37a provided adjacent to the upper part of the cyclone outer peripheral part 76 through the opening 38a.
[0094]
  Next, the operation of the embodiment shown in FIG. 5 will be described.
[0095]
  First, when removing the flux from the atmosphere sucked into the accommodating portion 14 via the suction air passage 5, the accommodating portion 14 and the communicating portion 33b are communicated by the switching valve 74.
[0096]
  The atmosphere sucked into the accommodating portion 14 is cooled by the water-cooled radiator 15 in the accommodating portion 14 to become cold air, and the mixed flux is misted or liquefied, and the communication portion 33b enters the centrifuge 75. It flows in the tangential direction of the inner wall of the outer periphery 76 of the cyclone.
[0097]
  Further, the atmosphere flowing into the centrifuge 75 becomes a spiral downward air flow between the inner wall of the cyclone outer peripheral portion 76 and the outer wall of the cyclone inner peripheral portion 77, and the flux mist is centrifuged and the cyclone outer peripheral portion 76 is separated. Adhere to the inner wall of
[0098]
  The flux adhering to the inner wall of the cyclone outer peripheral portion 76 falls by its own weight along the inner wall of the cyclone outer peripheral portion 76, is collected into the tray accommodating portion 82, and is recovered by the flux recovery portion 25b.
[0099]
  Further, the flux adhering to the outer wall of the cyclone inner peripheral portion 77 falls by its own weight along the cyclone inner peripheral portion 77, falls from the discharge hole at the lower end portion of the cyclone inner peripheral portion 77, and is collected in the tray accommodating portion 82. And collected by the flux collecting unit 25b.
[0100]
  The atmosphere from which the flux mist has been removed is sucked into the cyclone inner peripheral portion 77 from the lower end portion of the cyclone inner peripheral portion 77, and the fine particles of the flux remaining in the atmosphere are removed by the filter 81, and then circulating means. 13 circulates into the work cooling chamber 4.
[0101]
  On the other hand, after the operation of the soldering cooling device 2 or the like is stopped, when the flux that adheres and solidifies on the inner wall of the cyclone outer peripheral portion 76 and the outer wall of the cyclone inner peripheral portion 77 is recovered, the switching valve 74 The heater accommodating portion 71 is communicated with the communicating portion 33b.
[0102]
  The heat generated by the heater 31b in the heater accommodating portion 71 becomes hot air due to the wind sent into the heater accommodating portion 71 through the vent pipe 72.
[0103]
  The hot air flows into the centrifuge 75 through the communication portion 33b while the temperature is adjusted by the thermostat 73, and dissolves the solidified flux adhered to the inner wall of the cyclone outer peripheral portion 76.
[0104]
  Thereafter, the melted and liquefied flux falls by its own weight along the inner wall of the cyclone outer peripheral portion 76, is collected into the tray accommodating portion 82, and is collected by the flux collecting portion 25b.
[0105]
  Next, effects of the embodiment shown in FIG. 5 will be listed.
[0106]
  By centrifuging the flux misted by the cooling means 11 from the atmosphere with the centrifuge 75, the flux can be reliably separated from the atmosphere with a relatively simple configuration.
[0107]
  Moreover, since a filter for separating the flux mist is not required, troubles such as filter replacement are not required.
[0108]
  Since the heater 31b is provided in the heater accommodating portion 71 and separated from the accommodating portion 14, maintenance of the accommodating portion 14, the heater 31b, and the like is facilitated.
[0109]
  By providing a thermostat 73 for controlling the temperature of hot air discharged from the heater accommodating portion 71 on the downstream side of the heater accommodating portion 71, the temperature of the hot air discharged into the centrifuge 75 can be determined easily and reliably. Temperature can be set.
[0110]
  In each of the above embodiments, the removal unit 6 is not only used in the soldering cooling device 2 but also includes a flux that is provided on the work extraction side of the reflow furnace body 1 and is generated in the reflow furnace body 1. The flux may be removed from the atmosphere, or the flux may be removed from the atmosphere in the chamber chamber of the jet soldering device by being provided on the work carry-out side of the jet soldering device.
[0111]
  Further, the cooling means 11 and the flux removing means 12 can be arbitrarily combined with the configurations of the above embodiments.
[0112]
【The invention's effect】
  According to the first aspect of the present invention, the atmosphere containing the flux generated from the soldered workpiece is forcibly sucked into the suction air passage, and the flux mixed in the atmosphere is cooled by the cooling means. After misting, this misted fluxIs diffused to the whole of the first filter and the second filter side by the removal accommodating portion, and the mist flux is separated from the atmosphere by the metal first filter, and then the first filter By separating the fine particles of the flux that has passed through the filter from the atmosphere with a second filter made of resin, the atmosphere can be filtered in a wide area with each filter by the atmosphere diffused by the removal accommodating portion. For example, a single filter The flux removal efficiency is further improved compared to the case where the flux is separated by the filter, and the atmosphere can be filtered in a wide area by each filter by the atmosphere diffused by the removal accommodating portion, and each filter is not easily clogged.
[0113]
  According to the second aspect of the present invention, the atmosphere in the work cooling chamber is forcibly sucked by the suction air passage, the flux is removed by the flux removing means, and then circulated to the work cooling chamber by the circulation means. The atmosphere from which the air is removed can be reused for cooling the workpiece, the amount of outside air taken in can be reduced, and wasteful use of energy can be suppressed.
[0114]
  According to the third aspect of the present invention, the flux cooled and solidified by the cooling means is dissolved in a liquid state by the heating means, and the flux that is dissolved and falls by its own weight is recovered by the flux recovery section, thereby obtaining the flux. It can be collected easily and efficiently.
[0115]
  According to the fourth aspect of the present invention, the cooling pipe through which the cooling fluid passes is provided to meander from the outside to the inside of the housing part communicated with the suction air passage, and the fin is provided over the cooling pipe. Therefore, the heat of the atmosphere in the housing part is absorbed by the fins, and this heat is transported to the outside of the housing part by the cooling fluid passing through the cooling pipe, so that the heat is forcibly moved. Obtainable.
[0116]
  According to the invention described in claim 5, the internal heat radiation fin that cools the atmosphere forcedly sucked into the suction air passage and mists the flux mixed in the atmosphere to adhere to the inside of the storage section. An external radiating fin that is provided inside the housing part and exchanges heat between the outside and the inside of the housing part to cool the inside of the housing part is connected to the internal heat radiating fin and provided outside the housing part. By cooling, the internal heat radiation fin absorbs the heat of the atmosphere in the housing portion to the outside of the housing portion by the external heat radiation fin, whereby good cooling efficiency can be obtained.
[0117]
  According to the sixth aspect of the present invention, the plurality of branch air passages are provided inside the ventilation portion communicated with the suction air passage, and the external fin for exchanging heat between the outside and the inside of the ventilation portion is provided outside the ventilation portion. By providing this external fin and cooling the external fin with an air cooling fan, it is possible to obtain a good cooling efficiency by forcibly transferring heat from the ventilation section to the atmosphere through the external fin..
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a soldering flux removing apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a reflow apparatus using the above-described soldering flux removing apparatus.
FIG. 3 is a cross-sectional view showing a second embodiment of a soldering flux removing apparatus according to the present invention.
FIG. 4 is a sectional view showing a third embodiment of a soldering flux removing apparatus according to the present invention.
FIG. 5 is a cross-sectional view showing a fourth embodiment of a soldering flux removing apparatus according to the present invention.
[Explanation of symbols]
        W Work
        4 Work cooling chamber
        5 Suction air passage
        6 Removal unit as soldering flux removal device
        11 Cooling means
        12 Flux removal means
        13 Circulation means
        14 containment
        16 Cooling pipe as cooling pipe
        17 fins
        25 Flux recovery unit
        31 Heater as heating means
        34    The flux removal container which is the removal container
        35 Metal mesh as the first filter
        36 Resin mesh as second filter
        51 Internal heat dissipation fin
        52 External heat dissipation fin
        53 fans
        62 Vent
        64 branch air duct
        65 External fin
        66 Air-cooled fanN

Claims (6)

A suction air path for forcibly sucking in an atmosphere containing flux generated from the soldered workpiece;
Cooling means for cooling the atmosphere sucked into the suction air passage and misting the flux mixed in the atmosphere;
A flux removing means for separating and removing the flux misted by the cooling means from the atmosphere ;
The flux removal means is
A first filter made of metal that separates the flux misted by the cooling means from the atmosphere;
A resin-made second filter for separating fine particles of the flux that has passed through the first filter from the atmosphere;
A removal accommodating portion that is communicated with the cooling means, accommodates the first filter and the second filter, and is formed so as to expand from the cooling means side to the first filter and the second filter side. A flux removing apparatus for soldering, comprising: The suction air path is connected to the work cooling chamber that cools the work,
The soldering flux removal apparatus according to claim 1, further comprising a circulation means connected to the flux removal means and forcibly sucking the atmosphere into the workpiece cooling chamber. A heating means for dissolving the solidified flux cooled by the cooling means;
The flux removing device for soldering according to claim 1, further comprising: a flux collecting unit that collects a flux that is dissolved in a liquid by a heating means and falls by its own weight. Cooling means
A receiving section communicated with the suction air passage;
A cooling pipe that is provided from the outside to the inside of the housing part, meanders inside the housing part, and the cooling fluid passes through the inside;
The soldering flux removing apparatus according to any one of claims 1 to 3, further comprising a fin provided over the cooling pipe inside the housing portion. Cooling means
A receiving section communicated with the suction air passage;
An internal heat dissipating fin that is provided inside the housing part, cools the atmosphere, and mists the flux mixed in the atmosphere into the inside of the housing part to adhere to the inside of the housing part;
An external heat dissipating fin that is thermally connected to the internal heat dissipating fin and is provided outside the housing unit, and exchanges heat between the outside and the inside of the housing unit to cool the inside of the housing unit;
The soldering flux removing apparatus according to any one of claims 1 to 3, further comprising a fan that cools the external heat radiation fin. Cooling means
A ventilation portion communicated with the suction air passage and provided with a plurality of branch air passages therein;
An external fin that is provided outside the ventilation part and exchanges heat between the outside and the inside of the ventilation part;
The soldering flux removing apparatus according to any one of claims 1 to 3, further comprising an air cooling fan that cools the external fins .

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