JP5764707B1 - Plating auxiliary tool having a function of mitigating electric field concentration and plating method using the same - Google Patents

Abstract

An auxiliary tool is interposed between a hanging tool and a resin molded product, and the auxiliary tool also has a function of alleviating electric field concentration, so that resin molded products of different shapes can be plated simultaneously. And, the uniform electrodeposition of plating is enhanced without lowering the design freedom of the resin molded product. An assisting device main body comprising a fold line for breaking formed between a main plate material and each tongue piece so that the tongue piece can be easily broken and separated from the main plate material. And electric field concentrating members 11a, 13a, 15,. And an electric field concentrating member can be attached to the tongue piece 3 so as to be positioned around the corner and the overhanging portion of the resin molded product. [Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a plating jig used when plating a resin molded product, and in particular, a plating auxiliary tool having a function of reducing electric field concentration used when plating a resin molded product having corners and overhangs. And a plating method using the same.

  Conventional general resin plating methods include performing an etching process for roughening the surface of the resin molded product, an etching neutralization process, a catalyst applying process, and a conductive process (or electroless plating) on the resin molded product to be plated. The resin molded product pretreated in this way is subjected to the respective plating treatments in the order of the copper plating step and the nickel plating step, and finally the chromium plating step is carried out to finish.

  In the resin plating method that passes through each of these steps, the resin molded product is attached to a plating jig such as a hanging tool for plating. This hanging tool is obtained by attaching a plurality of clamping parts to a support column. The clamping part is opened and closed by a spring. A hook portion is formed at the tip of each clamping portion so that the resin molded product can be hooked. This hanging tool includes, for example, automotive resin plating parts such as automobile interior door handles, exterior door handles, exterior handle cover parts, etc., housing-related resin plated parts such as shower heads, faucet parts, etc., and mobile phones. Suitable for mass production of parts with the same shape as parts.

  In addition, a hanging tool having a structure in which one resin molded product is hooked at four hooks by a total of four sandwiching parts, two each on the upper and lower sides, is also used. This is suitable for mounting a large resin molded product.

  A current distribution as shown in FIG. 20 is generated on the surface of the resin molded product W (workpiece) plated with such a hanging tool. The current flows only on the electrode plate 71 side of the resin molded product W, and the current hardly flows on the opposite surface of the electrode plate 71 and the inner surface (left side in FIG. 20) of the resin molded product W. Since the plating is formed only where the current flows, the plating is thinly formed on the opposite surface of the electrode plate 71 and the inner surface of the resin molded product W where the current does not flow.

  In general, the portion of the resin molded product W that protrudes to the outside has a higher current density. The plated metal is likely to be deposited on the convex portions and overhanging corner portions of the resin molded product W. As shown in FIG. 21, when plating is performed on a plate-shaped resin molded product W, the current density is high in the corner flash portion of the resin molded product W. Therefore, the film thickness t1 of the flash portion is a resin molding with low current density. It tends to be thicker than the film thickness t2 at the center of the product W. In the case of plating with low throwing power as described above, roughness is generated in the corner portions, the luster is lost, and the appearance may be impaired.

  As countermeasures against this, as shown in FIGS. 22 (a) and 22 (b), a rounded surface (R surface) 72 is formed in advance at the corners and overhangs of the resin molded product W to prevent excessive plating. doing. For example, the left resin molded product W shown in the drawing has a sharp corner or overhang. Therefore, as in the case of the right resin molded product W, formation of a non-uniform film thickness is prevented by forming rounded surfaces (R surfaces) 72 in the respective portions.

  However, forming the R surface 72 at the corners or overhangs of such a resin molded product W limits the degree of freedom in designing the product, and is a countermeasure method that cannot be adopted for precise products. It was. Therefore, as shown in FIG. 23, in the plating tank 81, there is a technique for performing plating by arranging a shielding plate 82 between the electrode plate 71 and the resin molded product W, particularly at the corner or overhang portion of the resin molded product W. Proposed. The shielding plate 82 is a plate that shades the corner of the resin molded product W or the periphery thereof. This alleviates the concentration of current at the end of the resin molded product W and prevents the occurrence of angular flash.

  In addition, countermeasures using auxiliary electrodes in which cathodes are individually installed at corners or overhangs of resin molded products have been proposed. Even with this method of installing the auxiliary electrode, the electric field concentration of the high current density of the resin molded product can be relaxed, and formation of a non-uniform film thickness can be prevented.

  Furthermore, regarding the technique related to the plating process that improves the shape of the lower end of the current shielding plate so that the plating can be performed uniformly, for example, in Japanese Patent Application Laid-Open No. 8-296886, “Electroplating device”, In addition, current shielding plates for adjusting the plating current are provided on both sides of the upper and lower portions of the metal strip running in the plating tank, and the plating solution flows by ejecting fluid from between the current shielding plates on both sides of the lower portion. In an electroplating apparatus provided with a fluid nozzle, an electroplating apparatus has been proposed in which a predetermined slope is provided on the current shielding plates on both sides of the upper part and the lower end portion thereof is wedge-shaped.

JP-A-8-296086

  However, such a conventional countermeasure method using a shielding plate is suitable for mass production of products of the same size. When resin plating is applied to a resin molded product W having a deformed shape such as a nameplate such as letters and numbers, a room number, and a nameplate, the conventional shield plate 82 and the hanging tool 83 for mass production have various forms. In order to deal with the resin molded product W, there is a problem that the work is likely to be complicated. Also, the countermeasure method using the auxiliary electrode is not suitable for small-volume production.

  In particular, in a product that is easily visible to the human eye, such as a nameplate, the occurrence of “zara” at the corners and the loss of gloss may greatly reduce the product value.

  The present invention has been developed to solve such problems. That is, the object of the present invention is to interpose an auxiliary tool between a hanging tool and a resin molded product, and also to have a function of alleviating electric field concentration in the auxiliary tool, thereby simultaneously plating resin molded products of different shapes. A plating auxiliary tool having a function of mitigating electric field concentration that can be processed and can improve uniform electrodeposition of plating without reducing the degree of freedom of design of a resin molded product, and a plating method using the same It is to provide.

Plating aid of the present invention, at the time of electroplating wet the resin molded article (W), equipped with a relaxing function of the electric field concentration to attach when subjected hanging down tool hanging resin molded article (W) (83) A plating auxiliary tool (100, 200),
A plurality of tongue pieces (3) arranged in a rectangular main plate (2) in a direction perpendicular to the longitudinal direction so as to be separable at the root portion;
Folding fold line (4) formed between the main plate (2) and each tongue piece (3) so that the tongue piece (3) can be easily broken and separated from the main plate material (2). An auxiliary tool body (1) comprising:
Electric field concentrating members (11a, 11b, 11c, 13a, 13b) that positively deposit plating around the corners and overhangs of the resin molded product (W) and reduce the concentration of the electric field on the corners or overhangs. 13c, 15, 16, 17), and
During the plating process, the unnecessary tongue piece (3) is cut off, and the tip of the remaining tongue piece (3) is attached to the surface of the resin molded product (W) where plating is not performed, and a hanging tool ( 83) and the electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) so as to be positioned around the corners and overhangs of the resin molded product (W). Is configured to be attached to the tip of the tongue piece (3).

The electric field concentrating member (11a, 11b) is a plate-shaped member made square shaped synthetic resin.
The electric field concentration member (11c) is a box-shaped synthetic resin member.
The electric field concentrating member (13a, 13b) is a plate-shaped member made circular synthetic resin.
The electric field concentration member (13c) is a cylindrical synthetic resin member.
The electric field concentration members (15, 16, 17) are ring-shaped synthetic resin members.

The plating method of the present invention, when electroplating wet the resin molded article (W), mounting resin molded article (W) in the plating aid (100, 200), the plating aid and (100, 200) A plating method using a plating auxiliary tool provided with a function of mitigating electric field concentration to be hung on a hanging tool (83),
First, an unnecessary tongue piece (3) is cut off from a plurality of tongue pieces (3) provided in parallel on the substantially rectangular main plate (2) of the plating auxiliary tool (100, 200),
Next, the surface of the tongue (3) left on the plating auxiliary tool (100, 200) is attached to the surface of the resin molded product (W) that is not plated,
Furthermore, the electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) is placed on the tongue piece (3) so as to be positioned around the corner portion and the overhang portion of the resin molded product (W). At the tip of the
The resin molded article (W) to the mounting plating aid (100, 200) main plate (2), the wet electro plating hooked on the hanging device (83), said electric field concentrating member (11a, 11 b, 11 c, 13 a, 13 b, 13 c, 15, 16, 17), and positively depositing the plating so that the electric field does not concentrate on the corners and overhangs of the resin molded product (W). And

In the above configuration of the plating aid (100, 200), when the wet electroplating the resin molded article (W), the non surface electroplating, such as the back surface of the resin molded article (W), plated aid (100, 200) is attached by bonding with an adhesive or the like, and this plating auxiliary tool (100, 200) is suspended by a hanging tool (83) and immersed in a plating bath. Since this plating auxiliary tool (100, 200) is further provided with electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17), the electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) and the electrode plate (71) at the corner or overhang portion of the resin molded product (W) is positively deposited, and this resin molded product The concentration of the electric field on the corners or overhangs of (W) can be relaxed to prevent the occurrence of corner flash, and the film thickness of the plating can be made uniform.

  The plurality of electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, and 17) are formed of the main plate (2) according to the number of corners or overhangs that are shielded by the resin molded product (W). ) So that the electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) can be used properly according to the form and dimensions of the resin molded product (W). is there. Moreover, electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) having different shapes can be assembled to one main plate (2). Further, since the position of the electric field concentrating members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) can be shifted in the direction perpendicular to the axial direction of the main plate (2), the deformed resin The molded product (W) can be easily handled.

In the method having the above-described configuration, the necessary tongue piece (3) is left for the resin molded product (W) that constitutes one set of a plurality of members, and the resin molded product (W) is provided at the tip of each remaining tongue piece (3). ) With an adhesive. In this state, the plating auxiliary tool (100, 200) is suspended by the hanging tool (83) and immersed in the plating bath. So-called distant islets become resin molded article (W) can be carried out wet electroplating under the same conditions also. Since the electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) is further attached to the plating auxiliary tool (100, 200), the electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17), the plating is positively deposited between the corner plate or the overhanging electrode plate (71) of the resin molded product (W), and the resin molded product ( The concentration of the electric field on the corner or overhang of W) can be alleviated to prevent the occurrence of corner flash, and the film thickness of the plating can be made uniform.

  The electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) on which a large amount of plating metal has been deposited is removed from the plating auxiliary tool (100, 200) after the plating process is completed. The portion can be recovered, so that efficient plating can be performed without waste of materials.

  When the plating process is finished, the main plate (2) of the plating auxiliary tool (100, 200) is removed from the hanging tool (83), and then the tongue piece (3) attached to the resin molded product (W). Remove. At this time, since the tip of the tongue piece (3) is bonded to the surface of the resin molded product (W) with a “line”, the tongue piece (3) is detached from the resin molded product (W) with a weak force. be able to.

The state which attached the resin molded product to the plating auxiliary tool provided with the electric field concentration relaxation function of Example 1 is shown, (a) is a front view, (b) is a side view, and (c) is a plan view. The auxiliary | assistant main body of the plating auxiliary tool provided with the relaxation function of the electric field concentration of Example 1 is shown, (a) is a front view, (b) is a side view, (c) is a rear view. The electric field concentration member of the plating auxiliary tool provided with the electric field concentration relaxation function of Example 1 is shown, (a) is a front view, (b) is a top view. FIG. 3 is an enlarged cross-sectional view taken along line B-B in FIG. 2, (a) is a state before the tongue piece is cut off, (b) is a state during the cutting of the tongue piece, and (c) is a state where the tongue piece is cut off. It is an enlarged front view which shows the state which divided | segmented the main board | plate material of a plating auxiliary tool short, and cut | disconnected four tongue pieces. The modification 1 of the electric field concentration member of the plating auxiliary tool of Example 1 is shown, (a) is a front view, (b) is a top view. The modification 2 of the electric field concentration member of the plating auxiliary tool of Example 1 is shown, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is sectional drawing. The state which attached the resin molded product to the plating auxiliary tool which comprised the electric field concentration member is shown, (a) is a front view, (b) is a side view, (c) is a top view. The modification 3 of the electric field concentration member of the plating auxiliary tool of Example 1 is shown, (a) is a front view, (b) is a top view. The modification 4 of the electric field concentration member of the plating auxiliary tool of Example 1 is shown, (a) is sectional drawing, (b) is a top view. The modification 5 of the electric field concentration member of the plating auxiliary tool of Example 1 is shown, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a sectional view. It is a side view which shows the state which attached the some resin molded product to the single plating auxiliary tool of this invention. It is a front view which shows the electric field concentration member of the plating auxiliary tool of Example 2. It is a front view which shows the usage example of the electric field concentration member of the plating auxiliary tool of Example 2. It is a front view which shows the other usage example of the electric field concentration member of the plating auxiliary tool of Example 2. FIG. It is a front view which shows the modification 1 of the electric field concentration member of the plating auxiliary tool of Example 2. FIG. It is a front view which shows the modification 2 of the electric field concentration member of the plating auxiliary tool of Example 2. FIG. It is a front view which shows the usage example of the modification 2 of the electric field concentration member of the plating auxiliary tool of Example 2. FIG. It is a side view which shows the electric field concentration member which attached the some resin molded product to one plating auxiliary tool of this invention, and was attached so that this some resin molded product might be enclosed. It is explanatory drawing of the current distribution in electroplating. It is sectional drawing of the plating product in which the film thickness of the corner flash part was formed thicker than the center part of the resin molded product. It is explanatory sectional drawing which shows the state from which the film thickness of plating differs by forming R surface in the corner | angular part or overhang | projection part of a resin molded product, (a) is a state before forming R surface, (b) is This is the state after the R plane is formed. It is sectional drawing which shows the state which plate | plates using a shielding board in a plating tank.

  The present invention is a plating auxiliary tool for temporarily attaching a resin molded product to a hanging tool when resin plating of different shapes is simultaneously resin-plated.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a state where a resin molded product is attached to a plating auxiliary tool having a function of reducing electric field concentration in Example 1, (a) is a front view, (b) is a side view, and (c) is a plan view. is there. 2A and 2B show an auxiliary tool body of a plating auxiliary tool provided with a function of reducing electric field concentration according to the first embodiment. FIG. 2A is a front view, FIG. 2B is a side view, and FIG. FIG. 3 shows an electric field concentration member of a plating auxiliary tool having a function of reducing electric field concentration according to Example 1, wherein (a) is a front view and (b) is a plan view.
<Configuration of plating aid with a function of reducing electric field concentration>
The plating auxiliary tool 100 having a function of reducing electric field concentration according to the first embodiment is an auxiliary tool including the auxiliary tool main body 1 and an electric field concentration member 11a attached to the auxiliary tool main body 1. The illustrated example of FIG. 1 shows a state in which two electric field concentration members 11a for positively depositing plating are attached to the auxiliary tool body 2 that is partially broken. Further, the resin molded product W is a quadrangular shape having four corners.

  The auxiliary tool main body 1 is formed by arranging a plurality of tongue pieces 3 that can be separated at a root portion in a direction perpendicular to the longitudinal direction of the main plate material 2 in a substantially rectangular shape. In the plating auxiliary tool 100 of the present invention, a folding fold line 4 is formed between the main plate 2 and each tongue piece 3 so that the unnecessary tongue 3 can be easily broken and separated from the main plate 2. ing.

  The electric field concentration member 11a of Example 1 is a substantially rectangular plate-shaped member made of synthetic resin. The electric field concentration member 11a is used by being attached to a predetermined position of the tongue piece 3 of the auxiliary tool body 1. The electric field concentrating member 11a positively deposits plating between the corner or overhanging portion of the resin molded product W and the electrode plate 71 in the plating tank 81, thereby preventing the occurrence of corner rounding, and the plating film Has the function of making the thickness uniform.

<Auxiliary tool configuration>
4 is an enlarged cross-sectional view taken along the line B-B of FIG. 2, (a) is a state before the tongue piece is cut off, (b) is a state when the tongue piece is being cut off, and (c) is a state where the tongue piece is cut off. It is. FIG. 5 is an enlarged front view showing a state in which the main plate material of the plating auxiliary tool is divided into short pieces and four tongue pieces are cut off.
The main plate 2 of the plating auxiliary tool 100 having the electric field concentration mitigating function of the first embodiment is a single elongated plate-like member as shown in the figure. The plating auxiliary tool 100 is made of a synthetic resin material, and a material that can be easily cut and a material that can be coated with an adhesive or a pressure-sensitive adhesive is preferable. Moreover, in order to make it function as an auxiliary tool which hangs the resin molded product W with a hanging tool, it has a certain amount of rigidity and strength. On the other hand, when the immersion in the plating bath is completed and the drying process is completed, a material that can be easily removed from the resin molded product W is preferable. Further, the main plate member 2 may be formed with a plurality of through holes and uneven surfaces (not shown) so that the hook portion of the hanging tool 83 can be easily hooked.

  The plurality of tongue pieces 3 are members to which the resin molded product W and the electric field concentration member 11a are attached to the tips thereof with an adhesive or an adhesive. As a general rule, the tips of the tongue pieces 3 arranged in parallel are flush with each other. The tongue piece 3 can be separated from the main plate member 2 at its root portion, that is, the folding line 4 for breakage, and one resin molded product W is attached to one tongue piece 3 with an adhesive or the like. However, in the case of a large resin molded product W, a plurality of tongue pieces 3 can be simultaneously attached thereto. At this time, if the tips of the plurality of tongue pieces 3 are flush with each other, the adhesion to the resin molded product W and the electric field concentration member 11a is enhanced, and attachment to the resin molded product W becomes easy.

  The broken folding line 4 in the illustrated example is a groove formed in the main plate member 2 and the base of each tongue piece 3. This groove is thinner than the plate thickness of the main plate 2 and each tongue piece 3. The groove of the fold line 4 for breakage becomes more fragile than other members and easily breaks. Therefore, when using the plating auxiliary tool 100, the tongue piece 3 is bent at the groove portion of the folding line 4 as shown in FIGS. 4 (a) to 4 (b). Next, as shown in FIG.4 (c), if it breaks, the tongue piece 3 will be cut off.

  In the illustrated example of FIG. 5, the main plate member 2 is divided into short pieces, and the tongue pieces 3 are left at one end on both ends of the main plate member 2. In this way, the plating auxiliary tool 100 with the tongue piece 3 left is attached to the tongue piece 3 at both ends with an adhesive or an adhesive, and the space where the tongue piece 3 that becomes the gap is separated is a hanging tool. It becomes a part which latches the buttocks of 83 clamping parts. Since the closed space is formed, it is difficult to remove the collar portion of the clamping portion, and the plating process can be performed with peace of mind.

  The fold line 4 for breakage is not limited to this groove structure, and may be one having a plurality of through holes (not shown). The fold line 4 for breakage may be other than the structure of the groove or the through hole as long as the tongue piece 3 can be easily separated from the main plate 2. For example, the tongue piece 3 and the main plate member 2 may be formed of separate members, and these may be connected later with an adhesive.

In addition, the tongue pieces 3 are alternately arranged in a rectangular shape and in which the tip 3a to which the resin molded product W is attached is formed narrower than the root.
The tongue piece 3 having a rectangular shape as a whole has a wide tip, and can be applied with a wide range of adhesive or adhesive to the resin molded product W. Suitable for cases. In addition, it is not necessarily limited to using the single tongue piece 3 for one resin molded product W. In the case of a large resin molded product W, a plurality of tongue pieces 3 can be used.

  On the other hand, the tongue piece 3 having the tip 3a formed narrower than the root is suitable for a small resin molded product W. For example, it is suitable for the resin molded product W having a diagonal line shorter than one side of the tongue piece 3 having a rectangular shape described above. Alternatively, it is suitable for the resin molded product W having a complicated shape.

  FIG. 2 shows an example in which two types of tongue pieces 3 are alternately arranged. However, the present invention is not limited to this alternate arrangement, and tongue pieces 3 that are all in the same square shape may be arranged in parallel, and conversely, tongue pieces 3 that are all in the same shape in which the tip 3a is thin may be arranged in parallel. They can be arranged according to the shape of the resin molded product W to be attached. Or, a combination in which the tongue pieces 3 having a rectangular shape on one side are divided and arranged in parallel in the middle of one main plate member 2 and the tongue pieces 3 having a shape in which the tip 3a is thinned is arranged in parallel on the other side. Good.

<Configuration of electric field concentration member>
As shown in FIG. 3, the electric field concentration member 11a is a plate-shaped member made of synthetic resin having a square shape, for example, a substantially rectangular shape. The corner portion has a smooth curved surface, and has a structure that prevents the formation of a corner beam of the electric field concentration member 11a itself. The electric field concentration member 11a can prevent concentration of current density at two corners or protrusions of the resin molded product W.

Since this auxiliary tool body 1 is a plate-like member, it is suitable for plating a thin plate-shaped resin molded product W. As shown in FIG. 3, the resin molded product W is used for the same thickness as the plate thickness.

  Two electric field concentrating members 11a are attached to a predetermined position of the tongue piece 3 of the auxiliary tool body 1 so as to sandwich the resin molded product W. In addition, since the electric field concentration member 11a is arrange | positioned near the site | part in which the corner | angular part or projection part of the resin molded product W was formed, it is necessary to arrange | position two electric field concentration members 11a with respect to one resin molded product W. There is no. Only one electric field concentration member 11a may be used.

  The electric field concentration member 11a only needs to have a function of positively depositing plating between the corner portion or the overhang portion of the resin molded product W and the electrode plate 71 in the plating tank 81. It is not limited to a rectangular plate. As will be described later, any shape can be used as long as it has a substantially box shape, a substantially cylindrical shape, a substantially triangular box shape, a substantially rhombus box shape, or any other shape that can be easily attached to the tongue piece 3 of the auxiliary tool body 1. Good.

<Variation 1 of electric field concentration member>
6A and 6B show a first modification of the electric field concentration member of the plating auxiliary tool of the first embodiment, where FIG. 6A is a front view and FIG. 6B is a plan view.
The electric field concentration member 11b of Modification 1 is a substantially rectangular plate-shaped member made of synthetic resin, and has a slit 12b in the longitudinal direction thereof. The slit 12b has a function of preventing unnecessary metal deposition. The electric field concentration member 11b of the second modification is also used by being attached to a predetermined position of the tongue piece 3 of the auxiliary tool body 1.

<Modification 2 of the electric field concentration member>
7A and 7B show a second modification of the electric field concentration member of the plating auxiliary tool of Example 1, wherein FIG. 7A is a front view, FIG. 7B is a side view, FIG. 7C is a rear view, and FIG. . FIG. 8 shows a state where a resin molded product is attached to a plating auxiliary tool provided with an electric field concentration member, (a) is a front view, (b) is a side view, and (c) is a plan view.
The electric field concentration member 11c of Modification 2 is a substantially box-shaped synthetic resin member. This box-shaped electric field concentration member 11c is suitable for a thick resin molded product W. The corner portion is a smooth curved surface, and the electric field concentration member 11c itself has a structure that prevents the formation of a corner beam. The electric field concentration member 11c can prevent concentration of current density at two corners or protrusions of the resin molded product W. The electric field concentration member 11c has a slit 12c in the bottom of the box. This slit 12c can prevent useless metal deposition. Further, since the plating solution flows from the slit 12c, it is possible to avoid the problem that the plating solution is accumulated in the box-shaped electric field concentration member 11c.

  The illustrated example of FIG. 8 shows a state where two box-shaped electric field concentration members 11c for positively depositing plating are attached to the auxiliary tool body 2 that is partially broken. Further, the resin molded product W is a rectangular shape having a thickness with four corners.

<Modification 3 of the electric field concentration member>
9A and 9B show a third modification of the electric field concentration member of the plating auxiliary tool of Example 1, wherein FIG. 9A is a front view and FIG. 9B is a plan view.
The electric field concentration member 13a needs to be attached in the vicinity of the corner portion or the overhang portion of the resin molded product W. It arrange | positions according to the shape of the resin molded product W. Therefore, a shallow circular member is used as the electric field concentration member 13a of Modification 3 when the corner portion or the overhang portion of the resin molded product W is one place or two places in the vertical arrangement.

  The electric field concentration member 13a of the third modification is also used by being attached to a predetermined position of the tongue piece 3. The electric field concentration member 13a is capable of positively depositing plating between the corner portion or the overhang portion of the resin molded product W and the electrode plate 71 in the plating tank 81, thereby preventing the occurrence of corner rounding, and the plating film It has a function to make the thickness uniform.

The electric field concentrating member 13a of the third modification is not limited to being used alone, and can be used in combination with the above-described rectangular and box-shaped electric field concentrating members 11a and 11b. For example, when there are three corners or overhangs of the resin molded product W, one box-shaped electric field concentration member 11a, 11b and one circular electric field concentration member 13a may be used in combination. it can. A rectangular electric field concentration member 11a, 11b on the upper side and a circular electric field concentration member 13a on the lower side can be used in combination. These electric field concentrating members 11a, 11b, 13a may be also be mounted upside down direction.

<Variation 4 of the electric field concentration member>
FIGS. 10A and 10B show a fourth modification of the electric field concentration member of the plating auxiliary tool of Example 1, wherein FIG. 10A is a cross-sectional view and FIG. 10B is a plan view.
The electric field concentration member 13b of Modification 4 is a shallow circular member having a circular hole 14b. The electric field concentrating member 13b of the modified example 5 is also used when the corner portion or the overhanging portion of the resin molded product W is one place or two places in the vertical arrangement. The hole 14b has a function of preventing unnecessary metal deposition.

<Variation 5 of the electric field concentration member>
FIG. 11 shows a modified example 5 of the electric field concentration member of the plating auxiliary tool of Example 1, (a) is a front view, (b) is a side view, (c) is a rear view, and (d) is a sectional view. .
The electric field concentration member 13c of Modification 5 is a substantially cylindrical synthetic resin member. This cylindrical electric field concentration member 13c is suitable for a thick resin molded product W. The electric field concentration member 13c has a circular hole 14c in the bottom of the box. The electric field concentrating member 13c has a smooth curved surface, and has a structure that prevents the electric field concentrating member 13c itself from forming a square beam. This hole 14c can prevent useless metal deposition. Further, since the plating solution flows from the hole 14c, it is possible to avoid the problem that the plating solution is accumulated in the cylindrical electric field concentration member 11c.

  The electric field concentrating member 13c of the modified example 5 is also attached to a predetermined position of the tongue piece 3 for use. The electric field concentration member 13c is capable of positively depositing plating between the corner portion or the overhang portion of the resin molded product W and the electrode plate 71 in the plating tank 81, thereby preventing the occurrence of corner roundness, and the film of the plating. It has a function to make the thickness uniform.

  The electric field concentration member 13c according to the fifth modification is not limited to being used alone, and can be used in combination with the box-shaped electric field concentration member 11c described above. For example, when there are three corners or overhangs of the resin molded product W, one box-shaped electric field concentration member 11c and one cylindrical electric field concentration member 13 can be used in combination. A box-shaped electric field concentration member 13c on the upper side and a cylindrical electric field concentration member 13c on the lower side can be used in combination. These electric field concentration members 11c and 13c can be attached upside down.

<Description of operation of electric field concentration member>
In the plating auxiliary tool 100 of the present invention, first, the resin molded product W is attached to the tip of the tongue piece 3 of the auxiliary tool main body 1 with an adhesive or an adhesive.
Next, the electric field concentrating members 11a, 13a,... Are attached to the auxiliary tool body 1 with an adhesive or an adhesive. A portion of this current flows between the electric field concentrating members 11a, 13a,... And the electrode plates 71 at the corners or overhang portions of the resin molded product W so that the electric field concentrating members 11a, 13a,. Current concentration at a high current density at the corners or overhangs of the product W can be reduced.
Next, in this state, the plating auxiliary tool 100 is hung on the hanging tool 83 and immersed in the plating bath. Implementing wet electroplating under the same condition even the resin molded article W to be called away Kojima. Further, the tongue piece 3 is hooked on the collar portion of the clamping portion attached to the support rod of the hanging tool 83 in the gap between the adjacent tongue pieces 3 that are not cut off.

  In the plating process, the electric field concentrating members 11a, 13a,... Of the plating assisting tool 100 of the present invention pass a part of the electric current between the electric field concentrating members 11a, 13a,. It is possible to reduce the concentration of current on the corners or overhangs and prevent the occurrence of corner rounding by flowing to 13a. Therefore, the plating film thickness can be made uniform.

  When the plating process is completed, the main plate material 2 of the plating auxiliary tool 100 is removed from the hanging tool 83, and then the tongue piece 3 attached to the resin molded product W is removed. At this time, since the tip end portion of the tongue piece 3 is attached to the surface of the resin molded product W by “line” or “point”, the tongue piece 3 can be peeled from the resin molded product W with a weak force. it can.

FIG. 12 is a side view showing a state in which a plurality of resin molded products are attached to one plating auxiliary tool of the present invention.
The plating auxiliary tool 100 of the present invention does not necessarily need to be divided into small parts according to the dimensions of the resin molded product W. As shown in the drawing, a plurality of resin molded products W can be adhered and attached to the tip of the tongue piece 3 of one plating auxiliary tool 100 with an adhesive or an adhesive. In the illustrated example, a state in which resin molded products W having different alphabet characters are attached to one plating auxiliary tool 100 is shown. A single resin molded product W is fixed by one or two tongue pieces 3. The tongue piece 3 at the position where the resin molded product W is adjacent is separated. Thus, the plating auxiliary tool 100 of the present invention can simultaneously handle a plurality of resin molded products W having different shapes, and mass production becomes possible.

The electric field concentrating members 11a and 13a are attached at optimal positions so that a part of the current flows between the electric field concentrating members 11a and 13a between the corners of the resin molded product W or the electrode plates 71 at the protruding portions. In the illustrated example, different electric field concentration members 11a and 13a are used in combination. A horizontally long electric field concentration member 11 a was used on the nameplate “K” of the resin molded product W. Under this “K”, “H” having the same width is arranged. Thereby, the current concentration of the high current density to the corner | angular part or overhang | projection part of the resin molded product W can be eased.
Under this “H”, “A” is arranged in reverse. Under this “A”, “I” having the same lateral width is arranged. Under this “I”, a circular electric field concentrating member 13a close to its width is used. In this way, it is possible to prevent the film thickness of each corner flash portion from becoming thick even for the resin molded products W having different shapes. Further, by devising the arrangement of the resin molded product W, it is possible to reduce the number of electric field concentration members 11a and 13a used and prevent the deposition of useless metal. Note that these arrangement examples are merely examples, and the present invention is not limited thereto.
When the plating auxiliary tool 100 is removed from the plurality of resin molded products W after the completion of the plating process, the tongue piece 3 can be easily and quickly removed from the resin molded product W by tilting the plating auxiliary tool 100. Work is completed in a short time.

<Configuration of ring-shaped electric field concentration member>
FIG. 13 is a front view showing an electric field concentration member of the plating auxiliary tool of the second embodiment. FIG. 14 is a front view showing another example of use of the electric field concentration member of the plating auxiliary tool of the second embodiment. FIG. 15 is a front view showing another example of use of the electric field concentration member of the plating auxiliary tool of the second embodiment.
The electric field concentration member 15 of Example 2 is formed in a circular ring shape. As shown in the figure, the electric field concentrating member 15 of Example 2 has a plurality of corners or overhangs in the periphery of the star-shaped resin molded product W. Therefore, as described above, the electric field concentrating member 11a is located at two places on the top and bottom. .., 13a,... Cannot completely relieve the high current density electric field concentration at the corners or overhangs. Therefore, the ring-shaped electric field concentration member 15 is attached to the tongue piece 3 of the plating assisting tool 200 with an adhesive or an adhesive so as to wrap around the resin molded product W. Even in such a configuration, a part of the current flows between the corner portions or the protruding portions of the resin molded product W and the electrode plate 71 of the protruding portion so that the current flows to the electric field concentration member 15. It is possible to reduce the concentration of the corners and prevent the occurrence of cornering.

  As shown in FIGS. 14 and 15, the electric field concentration member 15 of the plating auxiliary tool of Example 2 is not limited to the corner portion or the overhang portion of the resin molded product W, and the shape around the circular resin molded product W is thin. It is also effective for the portion formed in the section having an acute-angled cross section. The resin molded product W shown in FIG. 14 is a circular product in which a circular hole is formed at the center. The resin molded product W shown in FIG. 15 is a ring-shaped product.

<Modified example 1 of ring-shaped electric field concentration member>
FIG. 16 is a front view showing a first modification of the electric field concentration member of the plating auxiliary tool of the second embodiment.
The electric field concentration member 16 of Example 2 is not limited to a circular shape as long as it is formed in a ring shape. It is also possible to square shape for example a substantially rectangular shape. In the illustrated example, the isosceles triangle shaped resin molded product W has one corner or overhang at the upper part and two at the lower part, so the circular electric field concentration member 15 shown in FIG. 13 cannot be used. . Therefore, as shown in FIG. 16, the electric field concentration member 16 is formed in a substantially rectangular shape. By using the electric field concentration member 16 having such a shape, the concentration of the electric field on the corner portion or the overhang portion of the resin molded product W can be reduced. In the case of a regular triangular resin molded product W, the distance from the center point to each vertex is the same, so the electric field concentration member 15 formed in a circular ring shape may be used.

<Modification 2 of the ring-shaped electric field concentration member>
FIG. 17 is a front view showing a second modification of the electric field concentration member of the plating auxiliary tool of the second embodiment. FIG. 18 is a front view showing a usage example of the second modification of the electric field concentration member of the plating auxiliary tool of the second embodiment.
As long as the electric field concentration member 17 of Example 2 is formed in a ring shape, it is not limited to a circular shape or a substantially rectangular shape. For example, it may be a substantially square shape as in Modification 2. In the illustrated example, the square resin molded product W has four corners at the top, bottom, left, and right. Therefore, the resin molded product W is used as a substantially square electric field concentration member 17 shown in FIG. The resin molded product W is arranged so that each corner portion approaches the electric field concentration member 17.
Further, as shown in FIG. 18, it is also possible to arrange the resin molded product W in the same manner as the shape of the ring-shaped electric field concentration member 17 of the second modification. Even with such an arrangement, the concentration of the electric field on the corners or overhangs of the resin molded product W can be reduced.
The electric field concentration members 15, 16, and 17 formed in the ring shape of the second embodiment are not limited to a circular shape, a substantially rectangular shape, or a square shape as long as they surround the resin molded product W.

<Usage example of ring-shaped electric field concentration member>
FIG. 19 is a side view showing an electric field concentrating member attached with a plurality of resin molded articles attached to one plating auxiliary tool of the present invention so as to surround the plurality of resin molded articles.
The electric field concentration member 16 of Example 2 formed in a ring shape does not necessarily need to be used for one resin molded product W. As illustrated, the electric field concentration member 16 can be attached so as to surround a plurality of resin molded products. In the illustrated example, a rectangular electric field concentration member 16 is used.

  In the present invention, the auxiliary tools 100 and 200 are interposed between the suspending tool 83 and the resin molded product W, and the auxiliary tools are also provided with a function of reducing electric field concentration. As long as W can be plated at the same time and the uniform electrodeposition of plating can be enhanced without reducing the design freedom of the resin molded product W, the present invention is not limited to the above-described embodiment. Of course, various changes can be made without departing from the scope of the invention.

Plating method using the relaxation function plating aid and which was equipped with the electric field concentration of the present invention can be utilized when electroplating wet in addition to the metal products of the resin molded article.

DESCRIPTION OF SYMBOLS 100,200 Plating auxiliary tool 1 Auxiliary tool main body 2 Main plate material 3 Tongue piece 3a Tip of tongue piece 4 Folding fold line 11a, 11b, 11c Electric field concentration member 12b, 12c Slit 13a, 13b, 13c Electric field concentration member 14b, 14c Circular shape Hole 15 Ring-shaped electric field concentrating member 16 Ring-shaped electric field concentrating member 17 Ring-shaped electric field concentrating member 71 Electrode plate 83 Hanging tool W Resin molded product

Claims (7)

When the resin molded article for (W) electroplating wet, the resin molded article (W) to hanging fixture (83) attached when applying hanging electric field concentration relaxation functions plating aid provided with the (100, 200) Because
A plurality of tongue pieces (3) arranged in a rectangular main plate (2) in a direction perpendicular to the longitudinal direction so as to be separable at the root portion;
Folding fold line (4) formed between the main plate (2) and each tongue piece (3) so that the tongue piece (3) can be easily broken and separated from the main plate material (2). An auxiliary tool body (1) comprising:
Electric field concentrating members (11a, 11b, 11c, 13a, 13b) that positively deposit plating around the corners and overhangs of the resin molded product (W) and reduce the concentration of the electric field on the corners or overhangs. 13c, 15, 16, 17), and
During the plating process, the unnecessary tongue piece (3) is cut off, and the tip of the remaining tongue piece (3) is attached to the surface of the resin molded product (W) where plating is not performed, and a hanging tool ( 83) and the electric field concentration members (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) so as to be positioned around the corners and overhangs of the resin molded product (W). A plating auxiliary tool provided with a function of alleviating electric field concentration, characterized in that it can be attached to the tip of the tongue piece (3). The electric field concentrating member (11a, 11b) is a plate-like member made of a synthetic resin square shape, plating aid provided with the relaxation function of the electric field concentration in claim 1, characterized in that.   2. The plating auxiliary tool having a function of reducing electric field concentration according to claim 1, wherein the electric field concentration member (11c) is a box-shaped synthetic resin member. The electric field concentrating member (13a, 13b) are plated aid equipped is a plate-like member made of a synthetic resin circular, relaxation function of electric field concentration in claim 1, characterized in that.   2. The plating auxiliary tool having a function of reducing electric field concentration according to claim 1, wherein the electric field concentration member (13c) is a cylindrical synthetic resin member.   2. The plating auxiliary tool having a function of reducing electric field concentration according to claim 1, wherein the electric field concentration member (15, 16, 17) is a ring-shaped synthetic resin member. Resin molded article for (W) when the electroplating wet, mounting resin molded article (W) in the plating aid (100, 200), the plating aid (100, 200) the hanging device in (83) A plating method using a plating auxiliary tool having a function of relaxing electric field concentration to be suspended,
First, an unnecessary tongue piece (3) is cut off from a plurality of tongue pieces (3) provided in parallel on the substantially rectangular main plate (2) of the plating auxiliary tool (100, 200),
Next, the surface of the tongue (3) left on the plating auxiliary tool (100, 200) is attached to the surface of the resin molded product (W) that is not plated,
Furthermore, the electric field concentration member (11a, 11b, 11c, 13a, 13b, 13c, 15, 16, 17) is placed on the tongue piece (3) so as to be positioned around the corner portion and the overhang portion of the resin molded product (W). At the tip of the
The resin molded article (W) to the mounting plating aid (100, 200) main plate (2), the wet electro plating hooked on the hanging device (83), said electric field concentrating member (11a, 11 b, 11 c, 13 a, 13 b, 13 c, 15, 16, 17), and positively depositing the plating so that the electric field does not concentrate on the corners and overhangs of the resin molded product (W). A plating method using a plating auxiliary tool having a function of reducing electric field concentration.