JP5652899B1 - Masking jig and masking method - Google Patents

Abstract

A masking jig capable of reliably preventing dripping and capable of being continuously used for a plurality of printed boards. A masking jig 1 for masking a conductive member provided on a surface of a printed circuit board from the insulating paint when spraying the insulating paint on the surface of the printed circuit board from above. A housing portion 10 that houses the outer surface of the member from above, and a plurality of protrusions 11a that are integrally formed continuously along the left-right direction of the housing portion 10 are spaced apart in the vertical direction of the housing portion 10. And a convex group 11 formed by being provided on the outer peripheral side surface 10S of the accommodating portion 10. [Selection] Figure 1

Description

  The present invention relates to a masking jig and a masking method, and more particularly, to a masking jig and a masking method that can reliably prevent dripping and can be used continuously for a plurality of printed circuit boards. .

  Conventionally, there are many masking techniques for protecting a predetermined object from liquid or paint. For example, Japanese Unexamined Patent Application Publication No. 2010-214258 (Patent Document 1) discloses a masking jig for masking a target seal attached to an object to be measured at the time of measurement by a non-contact coordinate measuring machine. . This masking jig is made of a silicone gel material, and includes an adhesion member that can be detachably attached to the target seal, a main body member that holds the adhesion member, and a handle member that protrudes from the main body member to the anti-adhesion member side. And the outer shape of the contact surface of the contact member is formed substantially equal to the contour of the target seal. This makes it possible for the operator to easily and reliably mask the target seal, eliminate the wiping operation during the whitening operation, and improve the workability of the whitening operation. In other words, since the adhesion member is formed of a silicone gel material, the masking jig can be easily adhered to the surface of the target seal without any gaps, and the masking jig and the target seal are caused by dripping during white coating. It is said that the mask can be reliably masked without any powder paint entering the gap. In addition, if the adhesion member is formed of a silicone gel material, it can be used as a masking object regardless of the material such as metal and non-metal, and it is economical because it can be attached and detached repeatedly. Yes. In addition, by making the handle member project from the main body member, the operator can easily remove the masking jig from the target seal by grasping the handle member. It is not necessary to remove the masking jig by scratching with a nail or a spatula, so that it is possible to reliably mask only the target seal without worrying that the powder coating around the target seal will be peeled off. Furthermore, since the time spent for attaching and detaching the masking jig is shorter than the time spent for the wiping operation, the time required for the white coating operation is greatly reduced, and a non-contact three-dimensional measuring machine was used. It is said that the efficiency of quality inspection can be improved.

  Japanese Patent Application Laid-Open No. 2000-187421 (Patent Document 2) discloses a coating method of a cleaning blade for removing toner remaining in contact with an image carrier and remaining on the image carrier. This method is characterized in that after the cleaning blade is molded, the longitudinal direction of the cleaning blade is arranged vertically and coating is performed. As a result, since the coating is performed after the blade is molded, it is possible to form a uniform coating layer on the blade member cutting surface of the manufactured cleaning blade, and a good cleaning blade that does not cause turning is obtained. It can be provided. In addition, since the longitudinal direction of the cleaning blade is arranged approximately vertically, there is no dimensional defect at the edge due to dripping, and the amount of adjustment of the coating liquid can be suppressed by controlling the mold size and piping length. In particular, even in short pot life coating liquids such as two-component mixed type coating liquids, etc., since the coating liquid can be adjusted appropriately according to the amount of consumption, the waste of the coating liquid is minimized. It is possible to limit. In addition, masking for preventing sheet metal contamination can be omitted during coating of the cleaning blade, and since the coating layer covers the surface of the urethane rubber, hydrolysis of the urethane rubber can be prevented.

  In addition, in Utility Model Registration No. 3106071 (Patent Document 3), a sheet main body composed of a paper surface layer and an aluminum back surface layer, and a bonding surface along one side in the longitudinal direction of the sheet main body are provided on the back surface side. A masking sheet for painting provided with an adhesive tape directed toward the surface is disclosed. As a result, in the painting work using the thermosetting paint, when applying the paint, no dripping occurs, and at the time of thermosetting, the heat can be reflected and the non-painted part can be protected. It is said that it is effective when a thermosetting paint is applied to a mixture of sheet metal parts and resin parts.

JP 2010-214258 A JP 2000-187421 A Utility Model Registration No. 3106071

  By the way, in the manufacture of printed circuit boards used in devices such as electronic devices, after installing various conductive members such as connectors on the surface of the printed circuit boards, an insulating paint (special paint) is applied to portions other than the conductive members. , Special chemicals, special solutions, etc.) are sprayed (applied). Usually, before such a process, an operator masks the conductive member by applying (covering) a masking tape to the conductive member. Thereby, a conductive member is protected from the insulating coating material sprayed, and the malfunction of the said conductive member is avoided.

  However, in the masking method using the masking tape, it is necessary for the operator to manually apply the masking tape to the conductive member, and there is a problem that it takes time and effort (for example, several tens of minutes). Also, the masking tape is usually peeled off after the insulating paint dries, so the insulating paint hardens and becomes difficult to peel off. After peeling, the masking tape marks on the printed circuit board or conductive member. There is a problem of remaining. In addition, after the spraying of the insulating paint is completed, the masking tape is peeled off from the conductive member, and the masking tape is discarded as waste, so that the masking tape is wasted.

  In addition, instead of using masking tape, a masking method that uses a masking jig that simply covers only the conductive member is also conceivable. However, with this masking jig, the number of times of masking increases and masking is performed. There is a problem that the insulating paint adhering to the outer surface of the jig hangs down and causes dripping. When this dripping occurs, the printed circuit board is soiled with an insulating paint, and there is a problem that the quality of the printed circuit board is impaired. In addition, in such a masking method, when dripping occurs, the used masking jig must be replaced with a new masking jig, which requires a replacement work.

  In other words, in the production of printed circuit boards, when masking tape is used in the spraying (coating) process of insulating paint on the printed circuit board, it takes time and labor for the operator, and the masking tape after work is a large amount of waste. There is a problem that occurs as.

  In addition, when a masking jig that only covers the conductive member is used, there is a problem that the masking jig needs to be replaced before dripping occurs. In particular, when there are a plurality of conductive members on the printed circuit board, a masking jig and a masking jig for replacement must be prepared in advance corresponding to the number of the conductive members. There is a possibility that the number of initial creations and the number of stocks may increase, and there is a problem that costs increase. Such a problem cannot be solved by the techniques described in Patent Documents 1-3.

  Therefore, in the present invention, a masking jig that has been made to solve the above-described problem, can reliably prevent dripping, and can be used continuously for a plurality of printed boards. And a masking method.

  As a result of extensive research, the present inventor has completed a novel masking jig and masking method according to the present invention.

That is, the present invention is a masking jig for masking a conductive member provided on the surface of the printed circuit board from the insulating paint when spraying the insulating paint on the surface of the printed circuit board from above. A plurality of ridges that are endless so as to surround and surround the storage portion with a storage portion that stores the outer surface of the sex member from above, with an interval in the vertical direction of the storage portion; And a protrusion group formed by providing on the outer peripheral side surface of the housing portion, and the insulating paint is sprayed from above after the masking jig is covered by the conductive member.

  Moreover, the thickness of the said accommodating part is 1.0 mm-3.0 mm. The interval between the plurality of ridges is constant and is 1.0 mm to 2.0 mm. Further, the protruding size in the left-right direction of the ridge from the outer peripheral side surface of the housing portion is 0.5 mm to 3.0 mm, and the vertical size of the ridge is 0.5 mm to 3.0 mm.

The present invention is also a masking method for masking a conductive member provided on the surface of the printed circuit board from the insulating paint when spraying the insulating paint on the surface of the printed circuit board from above. A plurality of accommodating portions accommodating the outer surface of the member from above, and a plurality of endless ridges so as to surround and surround the accommodating portion with a space in the vertical direction of the accommodating portion. A step of covering the conductive member with a masking jig provided with a group of ridges formed by providing on the outer peripheral side surface of the portion; and after covering the conductive member with the masking jig, And spraying from.

  According to the masking jig and the masking method using the same according to the present invention, it is possible to surely prevent liquid dripping and to use it continuously for a plurality of printed boards.

It is a perspective view of the masking jig concerning the present invention. Front view of the masking jig according to the present invention (FIG. 2A), sectional view of the masking jig according to the present invention (FIG. 2B), and enlarged sectional view of the ridge group of the masking jig according to the present invention (FIG. 2C) ) And an enlarged sectional view of the ridge when the shape is changed (FIG. 2D). It is a top view (Drawing 3A) which shows an example of a printed circuit board and a conductive member, and a top view (Drawing 3B) which shows an example of a masking tool installed in the upper surface of a printed circuit board. It is a figure which shows the result of the confirmation test of dripping prevention property and continuous usability. It is a figure which shows the result of the confirmation test of working time.

  DESCRIPTION OF EMBODIMENTS Embodiments of a masking jig and a masking method according to the present invention will be described below with reference to the accompanying drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

<Masking jig>
The present invention is a masking jig 1 for masking a conductive member 20 provided on the surface of a printed board 2 from the insulating paint when spraying the insulating paint on the surface of the printed board 2 from above. 1 and 2, a housing portion 10 that houses the outer surface of the conductive member 20 from above, and a plurality of ridges 11 a that are continuously formed integrally along the left-right direction of the housing portion 10. Are provided on the outer peripheral side surface 10S of the housing portion 10 with a spacing W in the vertical direction of the housing portion 10, and the masking jig 1 is attached to the conductive member 20. After being covered, the insulating paint is sprayed from above. As a result, dripping can be surely prevented, and it can be used continuously for a plurality of printed circuit boards 2.

  That is, in the masking jig 1 of the present invention, by providing a plurality of protruding ridges 11 a integrally formed along the left-right direction of the housing portion 10 on the outer peripheral side surface 10 </ b> S of the housing portion 10, The area of the outer peripheral side surface 10S is substantially increased. Therefore, when the insulating paint is sprayed on the surface of the printed circuit board 2 after covering the housing 10 of the masking jig 1 on the outer surface of the conductive member 20 of the printed circuit board 2, the sprayed insulating paint is A large amount adheres to the ridge 11a (outer surface) of the accommodating portion 10, and it is possible to reliably prevent adhesion (contamination) to the conductive member 20. Further, the adhering large amount of insulating paint forms a liquid pool on the upper surface of the ridge 11a, and the ridge 11a is integrally formed continuously along the left-right direction of the housing portion 10. Therefore, the liquid pool does not flow down downward and remains on the outer peripheral side surface 10S of the accommodating portion 10. As a result, it is possible to reliably prevent the insulating paint from dripping and maintain the quality of the printed circuit board 2.

  Further, by providing a plurality of ridges 11a at intervals W in the vertical direction of the accommodating portion 10, the number of places where the above-described liquid pools are formed is dramatically increased. Therefore, after spraying insulating paint onto a predetermined printed circuit board 2 mounted on the conductive member 20 with one masking jig 1, the masking jig 1 is further applied to the conductive member 20 of the new printed circuit board 2. Even if it is installed and the insulating paint is sprayed, dripping does not easily occur. That is, one masking jig 1 can be continuously used for a plurality of printed circuit boards 2, the frequency of replacement of the masking jig 1 is reduced, and the work efficiency required for manufacturing the printed circuit board is improved. Is possible. Further, by reducing the replacement frequency of the masking jig 1, it is not necessary to create a plurality of masking jigs 1 in advance, and the number of initial masking jigs 1 and the number of stocks can be reduced.

  In the present invention, the masking process is completed when the conductive member 20 of the printed circuit board 2 is covered with the accommodating portion 10 of the masking jig 1, and therefore the work time required for the masking process is several seconds to several tens of seconds. . Therefore, in the present invention, it is possible to dramatically shorten the work time as compared with the conventional case, and it is possible to improve the work efficiency as a whole.

  In the present invention, once the masking jig 1 is created, it can be used repeatedly. Therefore, in the present invention, it is possible to eliminate the masking tape that has been used conventionally and contribute to the reduction of environmental load.

  Here, the plurality of ridges 11 a provided on the outer peripheral side surface 10 </ b> S of the housing part 10 need to be integrally formed continuously along the left-right direction of the housing part 10. For example, even if the shape of the protrusion 11a is a fine protrusion (dot) shape, a striped pattern shape, a lattice shape, or a staggered shape, the effect of preventing dripping can be obtained to some extent, but in the case of these shapes The liquid pool formed on the upper surface of the ridge 11a may easily drip downward, which is not preferable.

  Now, the size A (protrusion size) of the ridge 11a from the outer peripheral side surface 10S of the accommodating portion 10 is not particularly limited as long as the object of the present invention is not impaired. From 0.5 mm to 3.0 mm, it is preferable. Thereby, the insulating coating material adhering to the accommodating part 10 forms a liquid pool appropriately on the upper surface of the ridge 11a by its own surface tension, and the ridge 11a can reliably receive the liquid pool.

  Further, the interval W between the plurality of ridges 11a is not particularly limited as long as the object of the present invention is not impaired, and any interval between the ridges 11a is random regardless of the interval between any ridges 11a. The interval of The constant or random interval W is preferably set to 1.0 mm to 2.0 mm, for example. As a result, the liquid pool of the insulating coating formed between the ridges 11a is easily fixed (maintained) between the ridges 11a by its own surface tension, and further prevents dripping. Is possible.

  Further, the size B of the ridge 11a in the vertical direction is not particularly limited as long as the object of the present invention is not hindered. For example, it is preferably 0.5 mm to 3.0 mm. Thereby, it becomes possible to provide the several protruding item | line 11a densely in the outer peripheral side surface 10S of the accommodating part 10, and it becomes possible to expand the area of the said outer peripheral side surface 10S greatly.

  Further, the number of the ridges 11a of the ridge group 11 is not particularly limited as long as the object of the present invention is not impaired, but is preferably 10 to 50, for example. Thereby, the area of the outer peripheral side surface 10 </ b> S of the housing portion 10 can be substantially expanded, and the occurrence of dripping can be further prevented.

  The shape of the ridge 11a is not particularly limited as long as the object of the present invention is not impaired. For example, as shown in FIG. 2, the shape of the ridge 11a protrudes from the outer peripheral side surface 10S of the housing portion 10 in the left-right direction (horizontal direction). 2D, the cross-sectional shape may be a quadrangular shape, or as shown in FIG. 2D, the cross-sectional shape may be a rhombus shape that protrudes upward from the outer peripheral side surface 10S of the accommodating portion 10 at a predetermined acute angle α with respect to the horizontal direction It is good also as a shape. Furthermore, as shown in FIG. 2D, the shape of the ridge 11a is a shape that protrudes from the outer peripheral side surface 10S of the accommodating portion 10 by a predetermined distance in the left-right direction and has its tip extended upward, and the cross-sectional shape is L-shaped. It is good also as a shape.

  The shape of the accommodating portion 10 is not particularly limited as long as it does not hinder the object of the present invention as long as the conductive member 20 can be accommodated. For example, as shown in FIGS. Corresponding to the quadrangular shape of the member 20, a rectangular box shape or a cylindrical shape in which the conductive member 20 is accommodated can be exemplified. Here, when the shape of the accommodating part 10 is a box shape, for example, it can be 5 mm to 100 mm in length, 5 mm to 100 mm in width, and 10 mm to 100 mm in height, corresponding to the size of the conductive member 20. .

  Further, the upper surface 10A of the accommodating portion 10 is not particularly limited as long as the object of the present invention is not impaired. For example, as shown in FIGS. 1 and 2, the upper surface 10A is a flat surface. A convex portion may be provided to receive the insulating paint.

  Further, the thickness t of the accommodating portion 10 is not particularly limited as long as the object of the present invention is not impaired, but is preferably 1.0 mm to 3.0 mm, for example. Thereby, the intensity | strength of the accommodating part 10 improves, it becomes possible for the accommodating part 10 to endure the raise of the external pressure at the time of spraying an insulating coating material, and the masking jig | tool 1 can be used repeatedly continuously.

  In addition, if the thickness t of the accommodating part 10 is 0.5 mm, for example, the accommodating part 10 cannot withstand the increase in the external air pressure due to the spraying of the insulating paint, and may be damaged. Further, when the thickness t of the accommodating portion 10 is, for example, 4.0 mm or more, even if the entire masking jig 1 is bulky and fits into the conductive member 20 of the printed circuit board 2, it interferes with adjacent members, It may not be possible to mask properly.

  The method for connecting the ridges 11a to the housing part 10 is not particularly limited as long as the object of the present invention is not impaired. For example, the housing part 10 and the ridges 11a are integrally formed by a manufacturing means such as a 3D printer. However, you may connect the protruding item | line 11a to the accommodating part 10 by attachment with connecting means, such as an adhesive agent.

  The material of the masking jig 1 of the present invention (the housing part 10 and the ridge group 11) is not particularly limited as long as the object of the present invention is not impaired. For example, a solvent-resistant synthetic resin (PET, acrylic) Resin), ceramic, metal and the like.

  The printed circuit board 2 can be an ordinary printed circuit board used in an electronic device or the like, and the conductive member 20 to be masked can be, for example, a connector from which a metal wire is exposed.

  The insulating paint is not particularly limited as long as it does not impair the object of the present invention. For example, an aerosol paint that can be sprayed is preferable. Here, the aerosol-based paint refers to a paint in which a paint and a liquefied gas or a high-pressure gas are sealed in a can, and the paint is blown out in a mist form by a gas pressure by opening through a predetermined opening. The components of the insulating paint are not particularly limited as long as the object of the present invention is not impaired, and examples thereof include high-molecular resins such as epoxy resins, polyester resins, urethane resins, and acrylic resins, and primers thereof. The viscosity of the insulating coating is not particularly limited as long as it does not hinder the object of the present invention. For example, based on JIS K5400-4.5.4 Ford Cup # 4 method, the viscosity is 5.0 sec / 20 degrees to 20.0 sec / 20 degrees. The insulating coating material may be a coating material having other properties such as quick drying, moisture proofing, rust proofing, and chemical resistance having a drying time of several minutes to several tens of minutes at room temperature in addition to insulating properties. .

  In the present invention, a plurality of masking jigs 1 may be combined to form one masking tool. For example, as shown in FIG. 3, a transparent net 3 having a size corresponding to the size of the printed circuit board 2 and a masking jig 1 corresponding to the size and number of conductive members 20 of the printed circuit board 2 are prepared in advance. . Next, when the permeable net 3 is arranged above the printed circuit board 2, the conductive member 20 can be accommodated at the position of the transmissive net 3 opposite to the position of the conductive member 20 of the printed circuit board 2. The upper surface 10A of the accommodating portion 10 of the masking jig 1 is bonded. By bonding the upper surface 10A of the accommodating portion 10 of the masking jig 1 corresponding to all the conductive members 20 to the permeable net 3, one masking tool corresponding to the printed board 2 is completed.

  As described above, if one masking tool including the masking jig 1 that accommodates (covers) all the conductive members 20 of the printed board 2 is prepared in advance for one printed board 2, the masking tool is provided. It is possible to mask the conductive member 20 to be masked with the masking jig 1 of the present invention by simply covering the printed circuit board 2, and it is possible to reduce the work time required for the masking process. In addition, by using the permeable net 3, the insulating paint can be sprayed onto a necessary portion of the printed circuit board 2 without being obstructed by spraying the insulating paint.

  Here, the method for adhering the masking jig 1 to the permeable net 3 is not particularly limited as long as the object of the present invention is not impaired. For example, as shown in FIG. I can do it.

  The material of the permeable net 3 is not particularly limited as long as the object of the present invention is not impaired, and examples thereof include solvent-resistant stainless steel and metal.

<Masking method>
The present invention is a masking method for masking the conductive member 20 provided on the surface of the printed circuit board 2 from the insulating paint when spraying the insulating paint on the surface of the printed circuit board 2 from above. The configuration is adopted.

  That is, according to the present invention, the accommodating portion 10 that accommodates the outer surface of the conductive member 20 from above, and the plurality of ridges 11a that are integrally formed continuously along the left-right direction of the accommodating portion 10 are provided as the accommodating portion. A step of covering the conductive member 20 with a masking jig 1 provided with a ridge group 11 formed by being provided on the outer peripheral side surface 10S of the housing portion 10 with an interval W in the vertical direction of 10; And a step of spraying an insulating paint from above after the jig 1 is placed on the conductive member 20. Even if comprised in this way, the effect similar to the above can be acquired.

<Examples, comparative examples, etc.>
Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

<Example 1>
The masking jig 1 shown in FIG. 1 was created using a 3D printer. The material of the masking jig 1 is acrylic resin, the size of the accommodating portion 10 is 24 mm in length, 30 mm in width, 38 mm in height, the thickness t of the accommodating portion 10 is 1.0 mm, and the horizontal direction of the ridge 11a The protrusion size A is 1.0 mm, and the interval W between the ridges 11a is a constant predetermined interval between all the ridges 11a and 1.0 mm, and the size B in the vertical direction of the ridges 11a. Was 1.0 mm, and the number of ridges 11a was 40.

<Comparative Example 1>
In Example 1, a masking jig was created under the same conditions except that the protruding stripe group 11 was deleted, the masking jig having only the accommodating portion 10 was used, and the material was paper. did.

<Comparative example 2>
In Example 1, the masking jig was created under the same conditions except that the convex stripe group 11 was deleted, the masking jig having only the housing portion 10 was used, and the material was an acrylic resin. 2.

<Result>
As shown in FIG. 4, when the number of sprays of the insulating paint was the fourth time, no dripping occurred in Example 1 and Comparative Example 1, but dripping occurred in Comparative Example 2. In Comparative Example 2, dripping continued to occur thereafter. Further, when the number of sprays of the insulating paint was the seventh time, no dripping occurred in Example 1, but dripping occurred in Comparative Example 1. In Comparative Example 1, dripping continued to occur thereafter. When the number of sprays of the insulating paint was the 10th, no dripping occurred in Example 1, but in Comparative Examples 1 and 2, the dripping was significant. Canceled. On the other hand, in Example 1, dripping hardly occurred even when the number of sprays of the insulating paint was the 18th. Therefore, in Example 1, it has confirmed that it had liquid dripping prevention property and continuous usability.

<Confirmation test for dripping prevention and continuous use>
The cardboard is regarded as a printed circuit board, and the masking jigs of Example 1 and Comparative Examples 1 and 2 are installed on the surface, and then the insulating paint is sprayed once to determine whether dripping has occurred. It was confirmed visually. Subsequently, the insulating paint was continuously sprayed once, and it was further confirmed whether or not dripping occurred. The spraying of the insulating paint and the confirmation of the occurrence of liquid dripping are continuously repeated until the number of spraying of the insulating paint reaches 18 times, and the liquid dripping prevention and continuous usability in each masking jig are obtained. confirmed.

<Example 2>
The masking jig shown in FIG. 1 corresponding to the conductive member of the printed circuit board shown in FIG. 5 is prepared using a 3D printer, and the masking jig is placed at the position of the transparent net corresponding to the position of the conductive member. The upper surface of the housing part was brazed and bonded to create a masking tool.

<Comparative Example 3>
The masking tape used conventionally is used as a masking jig.

<Working time confirmation test>
The working time required for masking was measured for the printed circuit board shown in FIG. Note that the number of conductive members (number of masking targets) of the printed circuit board is ten.

<Result>
As shown in FIG. 5, in Example 2, since the masking of the conductive member was completed simply by covering the printed board with the masking tool, the operation time was several seconds. On the other hand, in Comparative Example 3, it was necessary to apply a masking tape to each conductive member of the printed circuit board. Therefore, it took time to complete the masking, and the working time was 3 minutes. Therefore, in Example 2, it was confirmed that the working time can be remarkably shortened.

  In addition, when the masking tool of Example 2 is used, the time required from the attachment of the masking tool to the removal of the masking tool through spraying of the insulating paint is about 15 seconds, and the working efficiency is drastically improved. I confirmed that I can do it.

<Confirmation test of process time in printed circuit board production>
In manufacturing a specific printed circuit board, a masking process for 20 printed circuit boards was performed in Example 1, Comparative Example 2, and Comparative Example 3, and the time required for the process was measured.

<Result>
In Comparative Example 3, since the operator applies a masking tape for each conductive member of the printed circuit board, the time required for the masking process for 20 printed circuit boards is 23 minutes. In Comparative Example 2, it is only necessary to cover the conductive member with a masking jig. However, since there is no continuous usability of the masking jig, a new masking jig is used after it is used on five printed circuit boards. There was a need to create. Therefore, in Comparative Example 2, the time required for the masking process of 20 printed boards was 10 minutes.

  On the other hand, in Example 1, it is only necessary to cover the conductive member with a masking jig. Furthermore, since continuous use is possible, the time required for the masking process of 20 printed boards is 2 minutes. As a result, it was confirmed that Example 1 reduced the operation time in the actual masking of the printed circuit board, did not cause dripping, did not require a stock quantity, and was excellent in cost performance.

  As described above, the present invention is a masking jig 1 for masking a conductive member provided on the surface of the printed board from the insulating paint when spraying the insulating paint on the surface of the printed board from above. The housing portion 10 that houses the outer surface of the conductive member from above, and the plurality of protrusions 11a that are integrally formed continuously along the left-right direction of the housing portion 10 are arranged in the vertical direction of the housing portion 10. And a protruding strip group 11 formed by providing the outer peripheral side surface 10S of the housing part 10 with a gap W, and after the masking jig is covered with the conductive member, the insulating paint is applied from above. It is sprayed. Thereby, dripping can be reliably prevented, and it can be continuously used for a plurality of printed boards. The same applies to the masking method of the present invention.

  As described above, the masking jig and the masking method according to the present invention are effective as a masking jig and a masking method in the electrical and electronic field for producing a printed circuit board, and can reliably prevent dripping, It is effective as a masking jig and masking method that can be used continuously for a plurality of printed circuit boards.

DESCRIPTION OF SYMBOLS 1 Masking jig 10 Storage part 11 Convex strip 11a Convex

Claims (5)

A masking jig for masking the conductive member provided on the surface of the printed board from the insulating paint when spraying the insulating paint on the surface of the printed board from above,
An accommodating portion for accommodating the outer surface of the conductive member from above;
A plurality of ridges that are endless so as to surround and surround the housing portion, and are provided on the outer peripheral side surface of the housing portion at intervals in the vertical direction of the housing portion. A group and
The masking jig is sprayed from above after the masking jig is covered with the conductive member. The masking jig of Claim 1. The thickness of the said accommodating part is 1.0 mm-3.0 mm. The masking jig according to claim 1 or 2, wherein the interval between the plurality of protrusions is constant and is 1.0 mm to 2.0 mm. The protruding size in the left-right direction of the ridge from the outer peripheral side surface of the accommodating portion is 0.5 mm to 3.0 mm,
The masking jig according to any one of claims 1 to 3, wherein a size of the ridges in the vertical direction is 0.5 mm to 3.0 mm. A masking method for masking a conductive member provided on the surface of a printed board from the insulating paint when spraying the insulating paint on the surface of the printed board from above,
A plurality of accommodating portions for accommodating the outer surface of the conductive member from above, and a plurality of endless ridges so as to encircle the periphery of the accommodating portion, with an interval in the vertical direction of the accommodating portion. A step of covering the conductive member with a masking jig provided with a ridge group formed by providing on the outer peripheral side surface of the accommodating portion;
And a step of spraying an insulating paint from above after the masking jig is put on the conductive member.