JP2018058332A - Partially plated resin product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve appearance in a boundary part between a first corner part and a second corner part.SOLUTION: A partially plated resin product 10 includes a first base material 11 and a second base material 21 which are formed of mutually different resin materials. The first base material 11 and the second base material 21 are adjacent to each other in a first corner part 14 on the surface side of the first base material 11 and a second corner part 22 of the surface side of the second base material 21. The first corner part 14 has a convex curved wall surface 15. A metal film 31 is formed in a region which the second base material 21 is not brought into contact out of the outer surface of the first base material 11, and the metal film 31 is not formed on the outer surface of the second base material 21. In such the partially plated resin product 10, a groove formation part 25 forming a groove 24 in a space between the second corner part and at least the curved wall surface 15 of the first corner part 14 is provided in the second corner part 22.SELECTED DRAWING: Figure 1

Description

  The present invention includes a partially plated resin product that includes a first base material and a second base material formed of different resin materials, and a metal film is formed in a region where one of the outer surfaces is not in contact with the other. About.

  The first base material and the second base material in this type of partially plated resin product are formed in this order by two-color molding. Thereafter, for example, a partially plated resin product is formed by forming a metal coating on a region of the outer surface of the first substrate that is not in contact with the second substrate (for example, Patent Document 1, Patent Document). 2).

  An example of such a partially plated resin product is shown in FIG. In the partially plated resin product 70, the first base material 71 and the second base material 73 include a first corner portion 72 on the front side of the first base material 71 and a second corner portion 74 on the front side of the second base material 73. At least next to each other. The target shape of the first corner portion 72 and the second corner portion 74 is an angular shape as shown in FIG. And the metal coating 75 is formed in the area | region where the 2nd base material 73 is not contacting among the outer surfaces of the 1st base material 71 by the plating process. The metal coating 75 is not formed on the outer surface of the second base material 73.

Japanese Patent Laid-Open No. 2005-100964 JP 2010-33942 A

  In the conventional partially plated resin product 70, it is difficult to mold the square shape of the first corner portion 72 with a mold. This is because the first corner 72 is formed by the molding recess of the mold, but it is difficult to form the inner corner of the molding recess into an angular shape by NC machining, electric discharge machining, polishing, or the like. It is. Accordingly, as shown in FIGS. 10A and 10B, the first corner portion 72 is formed with a number of convex curved wall surfaces 76.

  Therefore, when the second base material 73 is formed after the first base material 71 is formed, a short shot is caused between the second corner portion 74 and the curved wall surface 76 of the first corner portion 72. There is a risk of gaps. The short shot here is caused by the fluidity of the molten resin, the gas accumulated in the molding space for molding the second corner portion 74, etc., and between the curved wall surface 76 and the mold in the molding space. This is a phenomenon in which molten resin does not flow to the innermost part of a narrow space.

  Then, the plating solution enters the gap by the subsequent plating process on the intermediate product made of the first base material 71 and the second base material 73 obtained as described above. When the intermediate product is taken out from the plating tank, the plating solution that has entered the gap is brought into the next plating tank while remaining due to surface tension. Then, the plating solution flows out, and the metal coating 75 is not accurately formed on the first base material 71, particularly the first corner portion 72, and the substrate may be exposed.

  Further, the position of the outer edge of the second corner portion 74 where the metal coating 75 is not formed by the plating process varies due to the short shot. As a result, the parting line 78 that is the outer edge of the metal coating 75 on the first corner 72 may vary.

As a result, the appearance at the boundary portion between the first corner portion 72 and the second corner portion 74 is degraded.
The present invention has been made in view of such circumstances, and its purpose is to provide a partially plated resin product capable of improving the appearance at the boundary between the first corner and the second corner. There is to do.

  A partially plated resin product that solves the above problems includes a first base material and a second base material that are formed of different resin materials, and the first base material and the second base material are made of the first base material. The first corner on the front side and the second corner on the front side of the second base material are at least adjacent to each other, the first corner has a convex curved wall surface, and the first base A partially plated resin product in which a metal film is formed on a region where one of the outer surfaces of the material and the second substrate is not in contact with the other, and a metal film is not formed on the other outer surface The second corner portion is provided with a groove forming portion for forming a groove between at least the curved wall surface of the first corner portion.

  According to said structure, the capacity | capacitance of the groove | channel formed between the groove | channel formation part in the 2nd corner | angular part of a 2nd base material and at least a curved wall surface of a 1st corner | angular part is in the prior art in which such a groove | channel is not formed. More than the capacity of the gap formed between the first corner and the second corner.

  Accordingly, when the intermediate product made of the first base material and the second base material is subjected to the plating process, even if the plating solution enters the groove, the plating solution is removed when the intermediate product is taken out from the plating tank. Easily discharged. The plating solution that has entered the groove remains with the surface tension, and is brought into the next plating tank, which hardly affects the deposition of the metal film. Therefore, a metal film is accurately formed on one of the first substrate and the second substrate without exposing the substrate.

  In addition, in the molding space for molding the second corner portion, there is a portion where the molten resin becomes difficult to flow as it gradually narrows, as between the conventional curved wall surface and the mold. Hard to occur. For this reason, a short shot that may have occurred in the past when the second corner portion in contact with the curved wall surface is formed occurs when the second corner portion having a groove between the curved wall surface is formed. Hateful. Therefore, the shape of the second corner is stable, and the variation in the position of the outer edge is smaller than the conventional one. As a result, the variation in the parting line that is the outer edge of the metal coating is reduced.

  In this way, a metal film having a small variation in parting line is formed on one outer surface of the first base material and the second base material without exposing the substrate. Therefore, the appearance at the boundary between the first corner and the second corner is improved as compared with the prior art in which a gap is formed between both corners.

In the partially plated resin product, it is preferable that the groove has a shape in which the groove width becomes narrower as the groove becomes deeper.
According to said structure, the groove width of a groove | channel becomes the minimum in the deepest part. The groove width increases with decreasing depth. Therefore, even if the plating solution enters the groove when the plating process is performed on the intermediate product, the plating solution is discharged from the portion having the largest groove width in the groove when the intermediate product is taken out from the plating tank. Therefore, it is easy to discharge efficiently.

  Further, the second corner portion that forms a groove between at least the curved wall surface of the first corner portion is formed by a molding protrusion of the mold. The molding protrusion has a shape opposite to the shape of the groove, that is, a shape in which the thickness is maximized at the root portion of the molding protrusion, and the thickness decreases as it approaches the tip. Such a shape is easier to manufacture than the case where the inner corner of the molding recess for molding the first corner is formed into an angular shape.

  In the partially plated resin product, the front side surface of the first base material adjacent to the first corner portion constitutes a general wall surface of the first base material, and the first corner portion is the curved portion. It has a standing wall surface extending in a direction intersecting with the general wall surface of the first base material from the wall surface, and the groove forming portion of the second corner portion from the first corner portion toward the front surface with respect to the standing wall surface. It is preferable to have an inclined wall surface that contacts the same wall surface in a state of being inclined so as to be far away.

  According to the above configuration, the inclined wall surface of the second corner is separated from the curved wall surface of the first corner. Therefore, when forming the second corner using a mold, it is difficult to be affected by the curved wall surface of the first corner. Unlike the conventional one, the molding space for molding the second corner portion is gradually narrowed, there is no portion where the molten resin does not flow easily, and short shots are unlikely to occur.

Therefore, a second corner having a stable shape is formed. The portion of the inclined wall surface that comes into contact with the standing wall surface is the outer edge of the second corner, but the variation in the position of the outer edge is smaller than that of the conventional one.
In addition, since the inclined wall surface at the second corner portion is in contact with the standing wall surface in a state inclined to the standing wall surface at the first corner portion, the groove is more than when the inclined wall surface is in contact with the curved wall surface. It will be deep and full of capacity. The capacity of the groove is larger than the capacity of the gap formed between the first corner and the second corner in the prior art in which no groove is formed.

  Therefore, when a plating process is performed on an intermediate product, even if the plating solution enters the groove, the plating solution is easily discharged when the intermediate product is removed from the plating tank. Is formed accurately.

  Such a parting line in the groove of the metal coating is located in the vicinity of the outer edge of the second corner. Since the variation in the position of the outer edge of the second corner is small as described above, the variation in the position of the parting line is small.

  In the partial plating resin product, it is preferable that the metal coating is formed in the groove at the curved wall surface of the first corner and a portion facing the groove on the standing wall surface.

  According to said structure, in a groove | channel, a metal film is formed in the curved wall surface of a 1st corner | angular part, and the location which faces a groove | channel in a standing wall surface. In this way, the portion where the metal coating is formed in the groove is separated from the second corner portion except for the contact portion with the inclined wall surface of the standing wall surface. Therefore, when forming a metal film, it is hard to be influenced from the second corner. The metal coating is formed in a stable state with respect to the curved wall surface and the standing wall surface of the first corner.

  Further, the metal coating is not formed on the inclined wall surface. The parting line of the metal coating is located in the vicinity of the outer edge of the second corner. Since the variation in the position of the outer edge of the second corner portion is small as described above, the variation in the position of the parting line is also reduced.

  In particular, the standing wall surface with which the inclined wall surface contacts intersects the general wall surface of the first substrate. The parting line is located in the vicinity of this standing wall. Therefore, even if the position of the parting line varies somewhat in the direction along the standing wall surface, the influence of the variation on the appearance is small.

  In the partially plated resin product, the front side surface of the first base material adjacent to the first corner portion constitutes a general wall surface of the first base material, and the first corner portion is the curved portion. It has a standing wall surface extending in a direction intersecting with the general wall surface of the first base material from the wall surface, and the groove forming portion of the second corner portion from the first corner portion toward the front surface with respect to the standing wall surface. It is preferable to have an inclined wall surface that is in contact with the curved wall surface while being inclined so as to be far away, and the groove is filled with a part of the metal coating.

  As described above, when the inclined wall surface at the second corner portion is in contact with the curved wall surface while being inclined to the standing wall surface at the first corner portion, the groove is more than when the inclined wall surface is in contact with the standing wall surface. Shallow and low in capacity. However, the capacity of the groove is larger than the capacity of the gap formed between the first corner and the second corner in the prior art in which no groove is formed.

Therefore, even if the plating solution enters the groove when the intermediate product is subjected to plating, the plating solution is easily discharged when the intermediate product is taken out from the plating tank.
In addition, unlike the conventional molding space, the mold space for molding the second corner is gradually narrowed, and a portion where the molten resin does not flow easily hardly occurs, resulting in a short shot. Hateful. Therefore, a second corner having a stable shape is formed.

  On the other hand, the groove having a small capacity as described above is filled with a part of the metal film. Therefore, the parting line that is the outer edge of the metal coating is not easily affected by the shape of the second corner. The variation in the parting line of the metal coating is smaller than in the prior art that is easily affected by the shape of the second corner.

  In the partially plated resin product, the front side surface of the second base material adjacent to the second corner portion constitutes a general wall surface of the second base material, and the general wall surface of the first base material And it is preferable that the said general wall surface of a said 2nd base material is located on the same plane.

  According to said structure, from the front side of a partial plating resin product, the metal film on the general wall surface of a 1st base material and the general wall surface of a 2nd base material are located on the substantially the same plane, and there is a level | step difference between both The appearance of the partially plated resin product is improved.

  In the partially plated resin product, the groove forming portion of the second corner portion has an inclined wall surface that is in contact with the curved wall surface while being inclined away from the first corner portion toward the front and back directions. In the groove, the metal coating is formed at a location facing the groove on the curved wall surface of the first corner portion, and a contact location of the inclined wall surface with the curved wall surface is the second corner. When the outer edge of the part, it is a dimension in the front and back direction, the depth from the outermost surface of the second corner part to the outer edge is set to 0.15 mm to 1.5 mm, And it is preferable that the angle which the said inclined wall surface makes with respect to the said front and back direction is set to 5 degrees-15 degrees.

Here, the front and back direction is the same direction as the mold splitting direction of the mold used for molding the intermediate product composed of the first base material and the second base material.
According to said structure, the area | region pinched | interposed by the groove | channel formation part of the 2nd corner | angular part which has an inclined wall surface, and the curved wall surface of a 1st corner | angular part comprises a groove | channel. The capacity of the groove is larger than the capacity of the gap formed between the first corner and the second corner in the prior art in which no groove is formed. Therefore, when the intermediate product is plated, the plating solution that has entered the groove is easily discharged when the intermediate product is taken out of the plating tank. Therefore, the metal coating is accurately formed on the outer surface of the first base material without exposing the substrate.

  In addition, unlike the conventional molding space, the mold space for molding the second corner is gradually narrowed, and a portion where the molten resin does not flow easily hardly occurs, resulting in a short shot. Hateful. Therefore, a second corner having a stable shape is formed. The variation in the position of the outer edge of the second corner, which is a portion that contacts the curved wall surface of the inclined wall surface, is smaller than that of the conventional one.

  On the other hand, the curved wall surface, which is a place where the metal coating is formed in the groove, is separated from the second corner except for the contact point with the inclined wall surface. Therefore, when forming a metal film, it is hard to be influenced from the second corner. The metal coating is formed in a stable state with respect to the curved wall surface.

  Further, the parting line of the metal coating on the groove forming part is located in the vicinity of the outer edge of the second corner part. Since the variation in the position of the outer edge of the second corner portion is small as described above, the variation in the position of the parting line is also reduced.

  In particular, the parting line is obtained by setting the angle formed by the inclined wall surface with respect to the front and back direction and the depth from the outermost surface of the second corner portion to the outer edge of the outermost surface to values satisfying the above conditions. Even if the positions of the scatter slightly in the front and back direction, the effect of the variation on the appearance is small.

  According to the said partial plating resin product, the improvement of the appearance in the boundary part of a 1st corner | angular part and a 2nd corner | angular part can be aimed at.

It is a figure which shows 1st Embodiment, (a) is a fragmentary sectional view of a partial plating resin product, (b) is a fragmentary sectional view which expands and shows a part of Fig.1 (a). (A)-(c) is a fragmentary sectional view explaining the process of shape | molding the 1st base material and the 2nd base material using a metal mold | die in 1st Embodiment. In 1st Embodiment, the schematic explanatory drawing which shows the electroplating process among the manufacturing processes of a partial plating resin product. It is a figure which shows 2nd Embodiment, (a) is a fragmentary sectional view of a partial plating resin product, (b) is a fragmentary sectional view which expands and shows a part of Fig.4 (a). (A)-(c) is a fragmentary sectional view which shows the modification of the partial plating resin product in 1st Embodiment. (A)-(c) is a fragmentary sectional view which shows the modification of the partial plating resin product in 1st Embodiment. (A), (b) is a fragmentary sectional view which shows the modification of the partial plating resin product in 1st Embodiment. (A) is a fragmentary sectional view which shows the modification of the partial plating resin product in 1st Embodiment, (b) is a fragmentary sectional view which expands and shows a part of Fig.8 (a). It is a figure explaining the conventional partial plating resin product, and the fragmentary sectional view of the partial plating resin product in case the 1st corner | angular part and the 2nd corner | angular part are formed in the target shape. (A) is a fragmentary sectional view of the conventional partial plating resin product, (b) is a fragmentary sectional view which expands and shows a part of Fig.10 (a). The fragmentary sectional view of the conventional partial plating resin product.

(First embodiment)
Hereinafter, 1st Embodiment of a partial plating resin product is described with reference to FIGS. 1-3. The partially plated resin product is embodied in a vehicle exterior product such as a front grill or a fog cover.

  FIG. 1A shows a partial cross-sectional structure of the partially plated resin product 10. FIG. 1B is an enlarged view of a part of FIG. 1A and 1B, the upper side indicates the front side (design surface side) of the partially plated resin product 10, and the lower side indicates the back side. The front and back direction is the same direction as the dividing direction of the molds 35 and 36 used for molding the intermediate product 48 composed of the first base material 11 and the second base material 21 described later.

The skeleton portion of the partially plated resin product 10 is composed of a first base material 11 and a second base material 21 formed of different resin materials.
The first substrate 11 is made of ABS (acrylonitrile / butadiene / styrene copolymer). The first base material 11 is formed with a recess 12 that is recessed from the front side surface toward the back side. In the first base material 11, the peripheral portion of the recess 12 constitutes a first corner 14 on the front side of the first base material 11. Of the front side surface of the first base material 11, a portion around the recess 12 and adjacent to the first corner portion 14 is formed in a planar shape, and constitutes a general wall surface 13 of the first base material 11. Yes. In the first corner 14, the corner on the front side and the recess 12 side has a fan-shaped cross section with a central angle α of 85 °. The corner portion has a convex curved wall surface 15 that is curved with a radius R of about 0.3 mm.

  The first corner portion 14 has a standing wall surface 16 at a location adjacent to the back side of the curved wall surface 15. The standing wall 16 extends from the curved wall 15 to the general wall 13 of the first base material 11 in a direction intersecting in a nearly orthogonal state, and is constituted by a plane that is connected to the bottom surface 12 a of the recess 12.

  The second base material 21 is formed of a resin material made of PC (polycarbonate) as a main component. The material-attached resin material is a material in which the resin itself is colored by mixing a coloring material such as a pigment into the resin material (PC) or by mixing a bright material together with the coloring material into the resin material (PC).

  A part of the second base material 21 is formed so as to fill the concave portion 12 of the first base material 11. In the second base material 21, a portion adjacent to the first corner portion 14 of the first base material 11 constitutes a second corner portion 22 on the front side of the second base material 21. The front side surface of the second base material 21 adjacent to the second corner 22 constitutes a general wall surface 23. The general wall surface 23 has a planar shape and is located on the same plane as the general wall surface 13 of the first base material 11.

  The second corner portion 22 is provided with a groove forming portion 25 that forms a groove 24 between at least the curved wall surface 15 of the first corner portion 14. The groove forming portion 25 has a flat inclined wall surface 26. The inclined wall surface 26 is inclined with respect to the standing wall surface 16 so as to move away from the first corner portion 14 toward the front side. When the depth of the groove 24 is represented by D, the inclined wall surface 26 is in contact with the standing wall surface 16 at a position away from the general wall surface 23 by a depth D of 1.0 mm or more from the back side. The location where the inclined wall surface 26 contacts the standing wall surface 16 is a location shallower than the bottom surface 12 a of the recess 12.

  The angle θ formed by the inclined wall surface 26 with respect to the standing wall surface 16 is preferably 60 ° or more. This is required in order to secure the strength of the molding protrusion 42 when the groove 24 is molded by a molding protrusion 42 (see FIG. 2B) provided in the second fixed mold 41 described later. This is a condition. In the first embodiment, the angle θ is set to 60 °.

  The groove 24 formed between the first corner portion 14 and the groove forming portion 25 has a shape in which the groove width W becomes the smallest at the deepest portion and the groove width W increases as it becomes shallower (substantially V-shaped in cross section). I am doing.

  A metal coating 31 is formed on the outer surface of the first base material 11 by a plating process in a region where the second base material 21 is not in contact. A part of the metal coating 31 is formed on the general wall surface 13. Another part of the metal coating 31 is formed on the first corner 14. In the groove 24, the metal coating 31 is formed on the curved wall surface 15 and the portion facing the groove 24 on the standing wall surface 16. On the other hand, the metal coating 31 is not formed on the outer surface of the second base material 21. In addition, the contact location with the standing wall surface 16 among the inclined wall surfaces 26 is only in contact with the terminal portion 33 of the metal coating 31. The terminal portion 33 is not formed (attached) at the contact portion between the inclined wall surface 26 and the standing wall surface 16.

Next, the operation and effect of the first embodiment configured as described above will be described together with the method for manufacturing the partially plated resin product 10.
First, the first base material 11 and the second base material 21 are formed by a two-color molding method. In the two-color molding, as shown in FIG. 2A, a mold 35 for molding the first base material 11 and a second base material 21 as shown in FIG. The mold 36 is used.

  The molds 35 and 36 include two types of fixed molds and a common movable mold 45 that approaches and separates from the fixed molds. The two types of fixed molds include a first fixed mold 37 and a second fixed mold 41. As shown in FIG. 2A, the first fixed mold 37 has a forming recess 38 for forming the first corner portion 14 having the curved wall surface 15 and the standing wall surface 16. The inner corner of the molding recess 38 has a curved wall 39 that curves with a radius of about 0.3 mm. The curved wall surface 39 is processed by NC processing, electric discharge processing, polishing processing or the like when the first fixed mold 37 is manufactured. That is, depending on these processing methods, it is difficult to form the inner corner of the molding recess 38 in an angular shape. A curved wall surface 39 that is curved at a radius of about 0.3 mm is formed at the inner corner of the molding recess 38 at a minimum.

  As shown in FIG. 2A, in the mold 35 for molding the first base material 11, a first fixed mold 37 is used as a fixed mold. When the mold 35 is clamped, a molding space 46 (cavity) for molding the first base material 11 is formed between the first fixed mold 37 and the movable mold 45. A part of the molding space 46 is constituted by the molding recess 38. Molten resin is supplied to the molding space 46 from a gate (not shown) provided in the mold 35. When the molten resin filled in the molding space 46 is cured, the first base material 11 having the curved wall surface 15 and the standing wall surface 16 at the first corner portion 14 is molded.

  Next, when the mold 35 is opened, the movable mold 45 is separated from the first fixed mold 37. At this time, the first base material 11 is attached to the movable mold 45 and is separated from the first fixed mold 37 integrally with the movable mold 45.

  As shown in FIG. 2B, in the mold 36 for molding the second base material 21, a second fixed mold 41 is used as a fixed mold. The second fixed mold 41 has a forming protrusion 42 for forming the second corner 22 on the second base material 21. The molding protrusion 42 has a shape that is opposite to the shape of the groove 24, that is, a shape in which the thickness is maximum at the root portion of the molding protrusion 42, and the thickness decreases as it approaches the tip. Such a shape is easier to manufacture than the case where the inner corner portion of the molding recess 38 is formed into an angular shape.

  As described above, the movable mold 45 to which the first base material 11 is attached is brought close to the second fixed mold 41 as shown in FIG. 2B, and the mold 36 is clamped. By this mold clamping, a molding space 47 for molding the second substrate 21 having the second corner 22 is formed between the first substrate 11 and the second fixed mold 41. A part of the molding space 47 is formed by the molding protrusion 42.

  Molten resin is supplied to the molding space 47 from a gate (not shown) provided in the mold 36. As the molten resin filled in the molding space 47 is cured, as shown in FIG. 2C, the second base material 21 having the groove forming portion 25 at the second corner portion 22 is molded. The second corner portion 22 having the groove forming portion 25 is formed between the forming protrusion 42 of the second fixed mold 41 and the bottom surface 12 a of the recess 12 in the first base material 11.

By forming the second corner portion 22, a groove 24 having a groove width W that decreases with increasing depth is formed between the groove forming portion 25 and the first corner portion 14 having the curved wall surface 15 and the standing wall surface 16. .
Here, the inclined wall surface 26 is separated from the curved wall surface 15. Therefore, when the second corner portion 22 is formed, it is difficult to be affected by the curved wall surface 15. That is, in the molding space 47 for molding the second corner portion 22, there is a portion where the molten resin is less likely to flow as it gradually becomes narrower as between the conventional curved wall surface 76 and the mold. Absent.

  Therefore, conventionally, when the second corner portion 74 in contact with the curved wall surface 76 is formed, a short shot that may have occurred due to the curved wall surface 76 is less susceptible to the curved wall surface 15. This is unlikely to occur when forming the second corner 22 of one embodiment. Further, in the conventional partially plated resin product 70, when a short shot occurs, the end of the second corner portion 74 may not be rounded properly, and a burr-like protrusion may be formed, but the short shot occurs. In the first embodiment that is difficult to form, such protrusions are difficult to form.

  Accordingly, the second corner portion 22 having a stable shape as shown in FIG. 1B is formed. The contact portion of the inclined wall surface 26 with the standing wall surface 16 becomes the outer edge 22a of the second corner portion 22 (parting portion between the first corner portion 14 and the second corner portion 22). It becomes smaller than the conventional one. In this way, an intermediate product 48 (see FIG. 2C) in which the first base material 11 and the second base material 21 are integrated is obtained.

  Here, the melting point of the PC used as the forming material of the second base material 21 is higher than the melting point of the ABS used as the forming material of the first base material 11 formed prior to the formation of the second base material 21. high. Therefore, when molten PC is supplied to the molding space 47, the molten PC having a temperature higher than the melting point of the first base 11 is brought into contact. The heat of the molten PC is transmitted to the first base material 11, and the interface between the first base material 11 and the second base material 21 is melted. The second substrate 21 is formed in a state in which it is more closely attached to the first substrate 11.

Subsequently, the intermediate product 48 is subjected to partial plating.
First, the intermediate product 48 is attached to the jig 50 shown in FIG. The jig 50 conveys the jig main body 51, a metal clip (not shown) provided on the jig main body 51 and sandwiching the electric contact portion 49 provided on the intermediate product 48, and the jig main body 51. And a hook portion 53 to be hooked on the machine 52. The conveyor 52 moves the jig 50 to which the intermediate product 48 is attached in the vertical direction and the horizontal direction. With this conveyance machine 52, the jig | tool 50 is moved to the position outside the plating tank 54, and electroconductivity provision process is performed. Thereafter, the jig 50 is moved to the various plating tanks 54 by the transfer device 52 to perform the electroplating process.

<Conductivity imparting step>
In this step, the following surface treatment is performed on the intermediate product 48 together with the jig 50. First, the surface of the intermediate product 48 is adjusted so that dirt such as dust and oil adhering to the outer surface of the intermediate product 48 is removed. Next, the outer surface of the intermediate product 48 is chemically roughened by etching the intermediate product 48 using an etching solution. Next, the outer surface of the intermediate product 48 is neutralized with an acid to reduce and remove hexavalent chromium which is a kind of etching component. Next, a catalyst (Pd—Sn compound) having a strong adsorptive power and a reducing power is adsorbed on the roughened outer surface of the intermediate product 48 by performing catalyst on the intermediate product 48. Next, an accelerator is applied to the intermediate product 48 to remove Sn adhering to the outer surface of the intermediate product 48 and activate Pd. Next, the intermediate product 48 is immersed in an electroless plating tank, and the intermediate product 48 is subjected to electroless plating, thereby forming an electroless plating layer. By performing the conductivity imparting step in this way, conductivity is imparted to the outer surface of the intermediate product 48.

<Electroplating process>
In this step, as shown in FIG. 3, the intermediate product 48 is immersed in various plating tanks 54 together with the jig 50. Each of the various plating tanks 54 stores a corresponding plating solution 55, and an anode electrode 56 is provided therein. An anode voltage is applied to the anode electrode 56. Further, a cathode voltage is applied to the intermediate product 48 through an electrical contact portion 49 sandwiched between clips. Since the conductive electroless plating layer described above is formed on the outer surface of the intermediate product 48, the outer surface is charged to the cathode.

In various types of electroplating, acid activation, strike plating, copper plating, semi-bright nickel plating, bright nickel plating, dispersed strike nickel plating, and chromium plating are sequentially performed.
Therefore, when the electroplating process is performed and a cathode voltage is applied to the intermediate product 48, a negative charge is applied to a region of the outer surface of the first base material 11 where the second base material 21 is not in contact. Is charged. Accordingly, the positive charge of the metal component dissolved in the plating solution 55 gathers around the first base material 11, and the metal coating 31 is formed.

  As shown in FIG. 1B, the metal coating 31 is formed in the groove 24 at the curved wall surface 15 and the portion of the standing wall surface 16 that faces the groove 24. The metal coating 31 is not formed on the groove forming portion 25. Assuming that the outer edge of the metal coating 31 is a parting line 32, the parting line 32 is separated from the vicinity of the contact portion (outer edge 22 a) between the inclined wall surface 26 and the standing wall 16, that is, the metal coating 31 is substantially separated from the outer edge 22 a. Located in the place.

  Here, as described above, the capacity of the groove 24 formed between the groove forming portion 25 and the first corner portion 14 having the curved wall surface 15 and the standing wall surface 16 is the same as that in the prior art in which the groove 24 is not formed. This is larger than the capacity of the gap formed between the first corner portion 72 and the second corner portion 74.

  In particular, in the first embodiment, the inclined wall surface 26 is in contact with the standing wall surface 16 in an inclined state. Therefore, the groove 24 is deeper and has a larger capacity than when the inclined wall surface 26 contacts the curved wall surface 15.

  Therefore, even if the plating solution 55 enters the groove 24 when the intermediate product 48 is subjected to the plating process, the plating solution 55 is easily discharged when the intermediate product 48 is taken out from the plating tank 54.

  Further, as described above, the groove width W of the groove 24 is the smallest at the deepest portion, and increases as the depth becomes shallower. Therefore, when the intermediate product 48 is taken out from the plating tank 54, the plating solution 55 that has entered the groove 24 during the plating process is discharged from the portion having the largest groove width W in the groove 24. It is easy to discharge well.

  As a result, unlike the prior art, the plating solution 55 that has entered the groove 24 is brought into the next plating tank 54 while remaining due to the surface tension, and the metal coating 31 is applied to the outer surface of the first substrate 11. Less likely to affect precipitation. Accordingly, the metal coating 31 is accurately formed on the first base material 11, particularly the first corner portion 14 without exposing the substrate.

  The curved wall surface 15 where the metal coating 31 is formed in the groove 24 and a part of the standing wall surface 16 are separated from the second corner portion 22 except for the contact point with the inclined wall surface 26 of the standing wall surface 16. ing. Therefore, when the metal coating 31 is formed, it is not easily affected by the second corner portion 22. When the expression is changed in a stable state with respect to the curved wall surface 15 and the standing wall surface 16, the metal coating 31 is formed with high adhesion.

  Further, as described above, since the variation in the shape of the second corner 22 is small, the variation in the position of the outer edge 22a of the second corner 22 is smaller than that of the conventional one. As a result, the variation of the outer edge (parting line 32) of the metal coating 31 formed at the boundary portion with the inclined wall surface 26 on the first corner portion 14 is reduced.

In this way, the base material of the first base material 11 is not exposed, and the metal coating 31 having a small variation in the parting line 32 is formed on the outer surface of the first base material 11.
Thereafter, when drying, removal of the jig 50, and inspection are sequentially performed, the target partially plated resin product 10 in which the metal coating 31 is formed on a part of the outer surface is obtained.

  In the partially plated resin product 10 obtained, as described above, the variation in the parting line 32 of the metal coating 31 is small. From this, the appearance (appearance) at the boundary portion between the first corner portion 14 and the second corner portion 22 is improved as compared with the prior art in which a gap is formed between the first corner portion 72 and the second corner portion 74.

  In particular, the standing wall surface 16 intersects the general wall surface 13 of the first base material 11 in a state close to orthogonal. The parting line 32 is located in the vicinity of the standing wall 16. Therefore, even if the position of the parting line 32 varies somewhat in the direction along the standing wall 16 (skin direction), the influence of the variation on the appearance (appearance) is small.

  Further, from the front side of the partially plated resin product 10, the metal coating 31 formed on the general wall surface 13 of the first base material 11 and the general wall surface 23 of the second base material 21 are located on substantially the same plane. Looks like. It appears that there is no or little step between the metal coating 31 and the general wall surface 23, and in this respect also, the appearance (appearance) of the partially plated resin product 10 is good.

  Further, in the conventional partially plated resin product 70, when a short shot occurs, a protrusion-like object such as a burr may be generated at the second corner portion 74 as described above. If a metal film is formed on such protrusions by plating, it may flicker when exposed to light. However, in the first embodiment, since the protrusions are not easily formed as described above, flickering hardly occurs due to the formation of the metal film 31 on the protrusions.

The first embodiment is superior to the above-described items in comparison with the conventional partially plated resin product 70 in the following respects.
FIG. 11 shows a conventional partially plated resin product 70 applied to a vehicle exterior product. In the partially plated resin product 70, the first base material 71 and the second base material 73 include a first corner portion 72 on the front side of the first base material 71 and a second corner portion 74 on the front side of the second base material 73. At least next to each other. The metal coating 75 is formed on the outer surface of the first base 71, but is not formed on the second base 73. A part of the terminal portion 82 of the metal coating 75 protrudes from the first base material 71 and is located on the second base material 73, but this is only in contact with the second corner portion 74.

  Since the vehicle exterior product is used in a severer environment in terms of weather and the like than the vehicle interior product, the metal coating 75 is larger than the metal coating in the partially plated resin product applied to the vehicle interior product. It is formed with a film thickness.

  Here, the charges in the plating solution are more likely to concentrate on the terminal portion 82 of the metal coating 75 than to other portions (general portion 81), and the amount of plating deposited increases. Therefore, the film thickness of the terminal part 82 becomes larger than the film thickness of the general part 81, and the terminal part 82 has a convex shape that swells to the front side of the general part 81. Such a tendency is not limited to the partially plated resin product 70 but is common to plated resin products in general.

  When the partially plated resin product 70 is applied to a vehicular exterior product in which the film thickness of the general portion 81 is originally large, the thickness of the terminal portion 82 and the general portion 81 are larger than when applied to a vehicular interior product. The terminal portion 82 has a convex shape that swells to the front side of the general portion 81, and the appearance (appearance) at the boundary portion between the first corner portion 72 and the second corner portion 74 is reduced.

  Further, when the film thickness of the terminal portion 82 having the convex shape as described above exceeds a certain value (excessive), excessive plating is locally deposited on the terminal portion 82 and the projection 83 is formed. A phenomenon called flowering occurs, which further deteriorates the appearance (appearance).

  Further, the terminal portion 82 is in contact with the boundary portion between the second corner portion 74 and the first corner portion 72 of the outer surface of the second base material 73, but is not attached thereto. Therefore, when a liquid that corrodes the copper coating in the metal coating 75 enters from the gap between the terminal portion 82 and the second corner portion 74, the copper coating may be corroded. In particular, when a finger or the like is touched on the terminal portion 82 or an impact is applied, the terminal portion 82 is peeled off and the gap is enlarged. The liquid easily enters the enlarged gap, and corrosion easily occurs.

  On the other hand, in the first embodiment shown in FIGS. 1A and 1B, a part of the metal coating 31 includes a curved wall surface 15 in the groove 24 and a portion facing the groove 24 in the standing wall surface 16. Formed. The terminal portion 33 of the metal coating 31 is formed on the standing wall 16. The curved wall surface 15 and the standing wall surface 16 are located at a location farther from the anode electrode 56 to the back side than the general wall surface 13.

  Therefore, the positive charge of the metal component dissolved in the plating solution 55 is less likely to collect on the curved wall surface 15 and the standing wall surface 16 than on the general wall surface 13, and the amount of plating deposited decreases.

  Further, the plating solution 55 around the first corner portion 14 is more likely to reach the general wall surface 13 than to the curved wall surface 15 and the standing wall surface 16. Plating is first deposited on the general wall surface 13 and the amount of plating deposited on the curved wall surface 15 and the standing wall surface 16 is reduced accordingly.

  Therefore, the curved wall surface 15 and the standing wall surface 16 are prevented from forming the terminal portion 33 having an excessive film thickness, the terminal portion 33 becoming convex, and the occurrence of the flower bloom phenomenon. can do. As a result, the appearance (appearance) at the boundary portion between the first corner portion 14 and the second corner portion 22 can be further improved.

  Further, the terminal portion 33 is located in the deepest place in the groove 24. Therefore, it is difficult for a finger or the like to be touched or an impact applied to the terminal portion 33. Although the end surface of the terminal portion 33 is in contact with the inclined wall surface 26 and is not attached thereto, the gap between the terminal portion 33 and the inclined wall surface 26 is difficult to expand. Therefore, the liquid that corrodes the copper coating in the metal coating 31 is less likely to enter the gap, and the copper coating can be prevented from being corroded. As a result, the peeling resistance and rust prevention properties of the metal coating 31 can be improved.

  In the first embodiment, the groove 24 has an angle θ formed by the inclined wall surface 26 with respect to the standing wall surface 16 of 60 ° to 120 °, a groove width W of 0.7 mm to 5.0 mm, and a depth D. It is desirable to be formed to be 0.2 mm to 1.5 mm. When the groove | channel 24 satisfy | fills these conditions, all can improve the said appearance (appearance), peeling resistance, and rust prevention property favorable.

(Second Embodiment)
Next, 2nd Embodiment of a partial plating resin product is described with reference to Fig.4 (a), (b).

  The second embodiment is common to the first embodiment in that the first corner portion 14 has a curved wall surface 15 and a standing wall surface 16. As in the first embodiment, the standing wall surface 16 is configured by a flat surface extending from the curved wall surface 15 to the general wall surface 13 of the first base material 11 in a direction intersecting in a nearly orthogonal state and connected to the bottom surface 12 a of the recess 12. ing.

  In the second embodiment, the inclined wall surface 26 in the second corner portion 22 is in contact with the curved wall surface 15 instead of the standing wall surface 16. A region sandwiched between the inclined wall surface 26 and the curved wall surface 15 forms a groove 24.

  In the second embodiment, the corner portion on the front side and the concave portion 12 side in the first corner portion 14 has a fan-shaped cross section having a central angle α of 85 °. The inclined wall surface 26 is in contact with the midpoint M of the arc A in this cross section. The inclined wall surface 26 is in contact with the curved wall surface 15 at a location away from the general wall surface 23 of the second base material 21 by a depth D to the back side. This depth D is shallower than the depth D in the first embodiment and is smaller than the radius R of the curved wall surface 15.

  The angle θ formed by the inclined wall surface 26 with respect to the tangent TL passing through the midpoint M of the arc A is preferably 60 ° or more. This is because, as in the first embodiment, the groove 24 is formed by the forming protrusion 42 (see FIG. 2B) of the second fixed mold 41 in order to ensure the strength of the forming protrusion 42. It is a required condition. Also in the second embodiment, the angle θ is set to 60 °.

  The groove 24 is filled with a part of the metal coating 31. In this respect, the second embodiment is different from the first embodiment in which the metal coating 31 is formed only on the curved wall surface 15 of the first corner portion 14 and a part of the standing wall surface 16 in the groove 24. Yes.

  In the second embodiment, the metal coating 31 is configured by laminating three types of coatings of a copper coating 61, a nickel coating 62, and a chromium coating 63. The copper coating 61 and the nickel coating 62 each have a thickness of about 50 μm, whereas the chromium coating 63 has a thickness of 1 μm or less.

Other configurations are the same as those in the first embodiment. For this reason, the same elements as those described in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
In the second embodiment configured as described above, since the inclined wall surface 26 is in contact with the curved wall surface 15 while being inclined with respect to the standing wall surface 16, the groove 24 is the first in which the inclined wall surface 26 contacts the standing wall surface 16. It is shallower than the embodiment, and has a smaller capacity than the first embodiment. However, the capacity of the groove 24 is larger than the capacity of the gap formed between the first corner portion 72 and the second corner portion 74 in the prior art in which the groove 24 is not formed.

  Therefore, even if the plating solution 55 enters the groove 24 when the intermediate product 48 is subjected to the plating process, the plating solution 55 is easily discharged when the intermediate product 48 is taken out from the plating tank 54.

  Further, unlike the conventional one, the molding space 47 for molding the second corner portion 22 is gradually narrowed, there is no portion where the molten resin does not flow easily, and a short shot is generated. Hard to occur. Therefore, the second corner portion 22 having a stable shape is formed. The contact portion of the inclined wall surface 26 with the curved wall surface 15 becomes the outer edge 22a of the second corner portion 22, but the variation in the position of the outer edge 22a is smaller than that of the conventional one.

  On the other hand, the groove 24 having a small capacity as described above is filled with a part of the metal film 31. Therefore, the outer edge (parting line 32) of the metal coating 31 is not easily affected by the shape of the second corner portion 22. The variation of the parting line 32 of the metal coating 31 is smaller than that of the conventional technique that is easily affected by the shape of the second corner portion 74.

  Therefore, the second embodiment can provide the same effects as those of the first embodiment. In addition, since the groove 24 is hidden by the metal film 31 buried in the groove 24, there is an advantage that the groove 24 is difficult to see from the front side of the partially plated resin product 10.

The second embodiment is superior to the conventional partial plating resin product 70 in the following points, in addition to the matters described above.
In the second embodiment, the terminal portion 33 is formed on the curved wall surface 15 in the groove 24. The curved wall surface 15 is located at a location farther from the anode electrode 56 to the back side than the general wall surface 13.

  Therefore, also in the second embodiment, the metal coating 31 having the excessively thick terminal portion 33 is formed on the curved wall surface 15 to suppress the terminal portion 33 from becoming a convex shape, and the flower bloom phenomenon is also suppressed. It can be suppressed. As a result, the appearance (appearance) at the boundary portion between the first corner portion 14 and the second corner portion 22 can be improved as in the first embodiment.

  In the second embodiment, a part of each end portion of the chromium coating 63 and the nickel coating 62 is located outside the groove 24 and is attached only by being in contact with the second base material 21. Absent. Therefore, when a finger or the like is touched on the terminal portion 33 of the metal coating 31 or an impact is applied, the chromium coating 63 and the nickel coating 62 may be peeled off and the gap with the second base material 21 may be enlarged. . However, the end portion of the copper coating 61 to be rusted is formed at the deepest location in the groove 24 and adjacent to the back side of the nickel coating 62. Therefore, even if a liquid that corrodes the copper coating 61 in the metal coating 31 enters the gap, it does not easily reach the copper coating 61. Therefore, the effect of improving the antirust property can be obtained also by the second embodiment.

In addition, said each embodiment can also be implemented as a modification which changed this as follows.
-In 1st Embodiment, the metal film 31 may be comprised by the film of 1 layer, and may be comprised by the several film of 2 layers or more.

In the second embodiment, the metal coating 31 may be constituted by a single layer coating or may be constituted by a plurality of coatings different from the three layers.
-Contrary to the said 1st and 2nd embodiment, the 1st base material 11 may be formed with PC, and the 2nd base material 21 may be formed with ABS. In this case, the metal coating 31 is formed in a region where the first base material 11 is not in contact with the outer surface of the second base material 21. Although the object on which the metal coating 31 is formed is different, the same effect as in the first and second embodiments can be obtained.

The inclined wall surface 26 in the second base material 21 is not limited to a flat surface, but may be curved so as to swell toward the front side or may be curved so as to be recessed toward the back side.
-As for the partial plating resin product 10, the general wall surface 13 of the 1st base material 11 and the general wall surface 23 of the 2nd base material 21 may be located on a mutually different plane.

  For example, in the partially plated resin product 10, the metal coating 31 (outer surface) on the general wall surface 13 of the first base material 11 and the general wall surface 23 of the second base material 21 are located on the same plane. May be. In this case, the general wall surface 13 of the first base material 11 is located at a position shifted to the back side by the film thickness of the metal coating 31 with respect to the general wall surface 23 of the second base material 21.

  In this way, from the front side of the partially plated resin product 10, the metal coating 31 on the general wall surface 13 of the first base material 11 and the general wall surface 23 of the second base material 21 are located on the same plane, and there is a step. The appearance (appearance) of the partially plated resin product 10 is further improved.

-At least one of the general wall surface 13 of the 1st base material 11 and the general wall surface 23 of the 2nd base material 21 may be comprised by the non-planar surface, for example, a curved surface.
-The partial plating resin product 10 in the said 1st Embodiment can be changed within the range which satisfy | fills the following conditions.

  Condition 1: The first base material 11 and the second base material 21 formed of resin materials different from each other are formed on the first base material 11 and have the first corner 14 on the front side having the convex curved wall surface 15. The second corner portion 22 on the front side of the second base material 21 is at least adjacent to each other.

  Condition 2: The metal coating 31 is formed in a region where one of the outer surfaces of the first substrate 11 and the second substrate 21 is not in contact with the other, and the metal coating 31 is formed on the other outer surface. Absent. This “not formed” includes those in which the metal coating 31 is in contact but not attached.

Condition 3: The second corner portion 22 is provided with a groove forming portion 25 that forms a groove 24 between at least the curved wall surface 15 of the first corner portion 14.
Each of (a) to (c) in FIGS. 5 and 6 and (a) and (b) in FIGS. 7 and 8 show an example of a modification that satisfies the above three conditions. Below, each modification is demonstrated centering around difference with 1st Embodiment and another modification. In addition, the same code | symbol is attached | subjected to the element similar to what was demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.

<Modification shown in FIG. 5A>
In the first embodiment, the groove forming portion 25 is constituted by a convex curved wall surface and an inclined wall surface 26. In the first embodiment, the curved wall surface is illustrated, but the description thereof is omitted. The groove forming portion 25 is in contact with the standing wall surface 16 at the inclined wall surface 26. A region surrounded by the groove forming portion 25, the curved wall surface 15, and the standing wall surface 16 constitutes a groove 24 having a substantially V-shaped cross-sectional shape. In the groove 24, the metal coating 31 is formed on the curved wall surface 15 and the standing wall surface 16. The end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the inclined wall surface 26.

  On the other hand, in the modification of FIG. 5A, the groove forming portion 25 is constituted by a convex curved wall surface 27, an inclined wall surface 26 and an inner bottom surface 28. The inner bottom surface 28 is constituted by a plane parallel to the general wall surfaces 13 and 23. The groove forming portion 25 is in contact with the standing wall surface 16 at the inner bottom surface 28. The groove | channel 24 is comprised by the area | region enclosed by the groove | channel formation part 25, the curved wall surface 15, and the standing wall surface 16, and has a cross-sectional shape different from 1st Embodiment. In the groove 24, the metal coating 31 is formed on the curved wall surface 15 and the portion of the standing wall surface 16 that faces the groove 24. The end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the inner bottom surface 28.

<Modification shown in FIG. 5B>
In the modification of FIG. 5B, the inner bottom surface is provided at the first corner portion 14 instead of the second corner portion 22, and the inner bottom surface 17 is connected to the lower end of the standing wall surface 16. The groove forming portion 25 is configured by a convex curved wall surface 27 and an inclined wall surface 26. The groove forming portion 25 is in contact with the inner bottom surface 17 on the inclined wall surface 26. A region surrounded by the groove forming portion 25, the curved wall surface 15, the standing wall surface 16, and the inner bottom surface 17 constitutes a groove 24. In the groove 24, the metal coating 31 is formed on the curved wall surface 15, the standing wall surface 16, and the inner bottom surface 17. The end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the inclined wall surface 26.

<Modification shown in FIG. 5C>
In the first embodiment, the standing wall surface 16 intersects the general wall surface 13 at an angle close to orthogonal, and the inclined wall surface 26 is gently inclined with respect to the general wall surface 23.

  In the modification of FIG. 5C, contrary to the first embodiment, the inclined wall surface 26 intersects the general wall surface 23 at an angle close to orthogonal, and the standing wall surface 16 is gently inclined with respect to the general wall surface 13. doing. An angle θ formed by the inclined wall surface 26 with respect to the standing wall surface 16 is smaller than that in the first embodiment.

The standing wall surface 16 is in contact with the inclined wall surface 26, and the end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 in the inclined wall surface 26.
<Modification shown in FIG. 6A>
In the modified example of FIG. 5C, the standing wall surface 16 is in contact with the groove forming portion 25 at a position away from the curved wall surface 27 in the inclined wall surface 26. In the modified example of FIG. 6A, the standing wall 16 is in contact with the groove forming portion 25 at the boundary between the inclined wall 26 and the curved wall 27. Along with the change of the contact portion of the standing wall surface 16 with the groove forming portion 25, the depth D of the groove 24 is shallower than that of the modified example of FIG.

Further, the end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 at the boundary portion between the inclined wall surface 26 and the curved wall surface 27.
<Modification shown in FIG. 6B>
In the modification of FIG. 6B, the groove forming portion 25 is configured by a part of the curved wall surface 27. The curved wall surface 15 is in contact with the groove forming portion 25 at the curved wall surface 27. The depth D of the groove 24 is further shallower than that of the modified example of FIG. 6A in accordance with the change of the contact portion of the curved wall surface 15 with the groove forming portion 25.

  A region sandwiched between both curved wall surfaces 27 and 15 constitutes a groove 24. In the groove 24, the metal coating 31 is formed on the curved wall surface 15. The end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the curved wall surface 27.

<Modification shown in FIG. 6C>
The modified example of FIG. 6C is common to the modified example of FIG. 5A in that the groove forming portion 25 is configured by the curved wall surface 27, the inclined wall surface 26, and the inner bottom surface 28.

  In the modification of FIG. 6C, the standing wall 16 is inclined more gently than the modification of FIG. Further, the inclined wall surface 26 is inclined more gently than the general wall surface 23 as compared with the modified example of FIG. Here, the angle formed by the standing wall 16 with respect to the general wall 13 and the angle formed by the inclined wall 26 with respect to the general wall 23 are set to be the same.

The angle θ formed by the inclined wall surface 26 with respect to the standing wall surface 16 is a large value (90 °).
The end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the inner bottom surface 28.

<Modification shown in FIG. 7A>
The modified example of FIG. 7A is common to the modified example of FIG. 6C in that the standing wall surface 16 and the inclined wall surface 26 are gently inclined with respect to the general wall surfaces 13 and 23.

  In the modification of FIG. 7A, the inner bottom surface 28 of FIG. 6C is omitted, and the groove forming portion 25 is constituted by the curved wall surface 27 and the inclined wall surface 26. Therefore, the end surface of the terminal portion 33 of the metal coating 31 is in contact with the groove forming portion 25 on the inclined wall surface 26.

<Modification shown in FIG. 7B>
In the modification of FIG. 7B, the standing wall 16 is inclined more gently than the modification of FIG. Further, the inclined wall surface 26 is inclined more gently than the general wall surface 23 as compared with the modified example of FIG. Therefore, the angle θ formed by the inclined wall surface 26 with respect to the standing wall surface 16 is a larger value (120 °) than that of the modified example of FIG.

The same actions and effects as those of the first embodiment are also exhibited by the modifications of FIGS.
Therefore, the variation in the position of the outer edge 22a of the second corner 22 can be made smaller than that of the conventional one. The metal coating 31 having a small variation in the parting line 32 is formed on the outer surface of the first base material 11 without exposing the substrate, and the appearance at the boundary portion between the first corner portion 14 and the second corner portion 22 ( (Appearance) can be improved.

  In addition, the terminal portion 33 of the metal coating 31 is prevented from being convex or a flower bloom phenomenon occurs in the terminal portion 33, and the appearance at the boundary between the first corner portion 14 and the second corner portion 22 is improved. (Appearance) can be improved. Moreover, both the peeling resistance and rust prevention property of the terminal part 33 can be improved favorably.

<Modification shown in FIGS. 8A and 8B>
In the modification of FIGS. 8A and 8B, the second corner portion 22 is superimposed on the front side of the first corner portion 14.

  The groove forming portion 25 of the second corner portion 22 is inclined so as to move away from the first corner portion 14 toward the front side with respect to the convex curved wall surface 27 and the front / back direction, that is, the mold splitting direction of the molds 35 and 36. Thus, the inclined wall surface 26 is in contact with the curved wall surface 15. In the groove 24, the metal coating 31 is formed at a location facing the groove 24 on the curved wall surface 15. In addition, although the end surface of the terminal part 33 of the metal coating 31 is located on the groove formation part 25, it is only contacting and not adhering.

  Here, the contact portion of the inclined wall surface 26 with the curved wall surface 15 is defined as the outer edge 22 a of the second corner portion 22. It is the dimension in the front and back direction, Comprising: The depth D1 from the most front side location to the outer edge 22a among the outer surfaces of the 2nd corner | angular part 22 is set to 0.15 mm-1.5 mm. The depth D1 is more preferably set to 0.2 mm to 1.0 mm, and further preferably set to 0.3 mm to 0.8 mm.

  In addition, in this modification, the angle θ1 formed by the inclined wall surface 26 with respect to the front and back directions is set to 5 ° to 15 °. This angle θ1 is more preferably set to 5 ° to 10 °.

  8 (a) and 8 (b), it is sandwiched between the groove forming portion 25 of the second corner portion 22 having the inclined wall surface 26 and the curved wall surface 27, and the curved wall surface 15 of the first corner portion 14. The region constitutes a groove 24. The capacity of the groove 24 is larger than the capacity of the gap formed between the first corner portion 72 and the second corner portion 74 in the prior art in which the groove 24 is not formed. Therefore, when the intermediate product 48 is subjected to the plating process, the plating solution that has entered the groove 24 is easily discharged when the intermediate product 48 is taken out from the plating tank 54. Therefore, the metal coating 31 can be accurately formed on the outer surface of the first base material 11 without exposing the substrate.

  Further, unlike the conventional one, the molding space for molding the second corner 22 is gradually narrowed, and a portion where the molten resin does not easily flow is less likely to occur. Is unlikely to occur. Accordingly, the second corner portion 22 having a stable shape can be formed, and the variation in the position of the outer edge 22a can be made smaller than that of the conventional one.

  On the other hand, the curved wall surface 15, which is a place where the metal coating 31 is formed in the groove 24, is separated from the second corner portion 22 except for a contact point with the inclined wall surface 26. Therefore, when the metal coating 31 is formed, the metal coating 31 is hardly affected by the second corner 22 and can be formed in a stable state with respect to the curved wall surface 15.

  Further, the parting line 32 of the metal coating 31 on the groove forming portion 25 is located in the vicinity of the outer edge 22a. Since the variation in the position of the outer edge 22a is small as described above, the variation in the position of the parting line 32 is also reduced.

  Particularly, since the angle θ1 is set to a small value such as 5 ° to 15 ° and the depth D1 is set to a value such as 0.15 mm to 1.5 mm, the position of the parting line 32 varies somewhat in the front and back direction. However, the effect of these variations on appearance is small.

  In this way, the metal coating 31 with small variation in the parting line 32 is formed on the outer surface of the first base material 11 without exposing the substrate. Therefore, it is possible to improve the appearance (appearance) at the boundary portion between the first corner portion 14 and the second corner portion 22.

Furthermore, since the partially plated resin product 10 is applied to a vehicular exterior product having a originally large film thickness at locations other than the terminal portion 33, the following actions and effects can be obtained.
The curved wall surface 15 on which the metal coating 31 is formed is located at a location farther from the anode electrode 56 (see FIG. 8A) to the back side than the general wall surface 13 during the plating process. Therefore, the positive charge of the metal component dissolved in the plating solution 55 is less likely to collect on the curved wall surface 15 than on the general wall surface 13, and the amount of plating deposited decreases. Further, the plating solution 55 around the first corner portion 14 can easily reach the general wall surface 13 rather than the curved wall surface 15. Plating is first deposited on the general wall surface 13, and the amount of plating deposited on the curved wall surface 15 is reduced accordingly.

  From these things, it can suppress that the terminal part 33 of an excessive film thickness is formed in the curved wall surface 15, and that the terminal part 33 becomes convex shape, and that a flower bloom phenomenon occurs is suppressed. . As a result, also in this respect, the appearance (appearance) at the boundary portion between the first corner portion 14 and the second corner portion 22 can be improved.

  -Partially plated resin products can be applied not only to vehicle exterior products but also to vehicle interior products. Further, the partially plated resin product can be applied to a decorative product in a field different from the vehicle.

  DESCRIPTION OF SYMBOLS 10 ... Partially plated resin product, 11 ... 1st base material, 13 ... General wall surface of 1st base material, 14 ... 1st corner | angular part, 15, 27 ... Curved wall surface, 16 ... Standing wall surface, 21 ... 2nd base material, 22 ... 2nd corner | angular part, 22a ... outer edge, 23 ... General wall surface of 2nd base material, 24 ... Groove, 25 ... Groove formation part, 26 ... Inclined wall surface, 31 ... Metal coating, 35, 36 ... Mold, D, D1, depth, θ, θ1, angle, W, groove width.

Claims (7)

Comprising a first base material and a second base material formed of different resin materials;
The first base material and the second base material are at least adjacent to each other at the first corner portion on the front side of the first base material and the second corner portion on the front side of the second base material,
The first corner has a convex curved wall surface,
A partially plated resin in which a metal film is formed in a region where one of the outer surfaces of the first substrate and the second substrate is not in contact with the other, and a metal film is not formed on the other outer surface. Product,
The partially plated resin product, wherein the second corner portion is provided with a groove forming portion that forms a groove between at least the curved wall surface of the first corner portion.   The partially plated resin product according to claim 1, wherein the groove has a shape in which the groove width becomes narrower as the groove becomes deeper. The front side surface of the location adjacent to the first corner in the first base material constitutes the general wall surface of the first base material,
The first corner portion has a standing wall surface extending from the curved wall surface in a direction intersecting the general wall surface of the first base material,
The groove forming portion of the second corner portion has an inclined wall surface that comes into contact with the standing wall surface in a state where the groove forming portion is inclined away from the first corner portion toward the front surface with respect to the standing wall surface. Partially plated resin products described in 1.   4. The partially plated resin product according to claim 3, wherein the metal coating is formed in the groove on the curved wall surface of the first corner and on the standing wall surface facing the groove. 5. The front side surface of the location adjacent to the first corner in the first base material constitutes the general wall surface of the first base material,
The first corner portion has a standing wall surface extending from the curved wall surface in a direction intersecting the general wall surface of the first base material,
The groove forming portion of the second corner portion has an inclined wall surface that comes into contact with the curved wall surface in a state of being inclined away from the first corner portion toward the front surface with respect to the standing wall surface,
The partially plated resin product according to claim 2, wherein the groove is filled with a part of the metal film. The front side surface of the location adjacent to the second corner in the second base material constitutes the general wall surface of the second base material,
The partially plated resin product according to any one of claims 3 to 5, wherein the general wall surface of the first base material and the general wall surface of the second base material are located on the same plane. The groove forming portion of the second corner portion has an inclined wall surface that contacts the curved wall surface in a state inclined toward the front side from the first corner portion with respect to the front and back directions,
In the groove, the metal coating is formed at a location facing the groove on the curved wall surface of the first corner,
When the contact portion of the inclined wall surface with the curved wall surface is the outer edge of the second corner portion, it is a dimension in the front and back direction, and the outer edge from the most front side portion of the outer surface of the second corner portion. The partially plated resin product according to claim 2, wherein a depth of up to 0.15 mm to 1.5 mm is set, and an angle formed by the inclined wall surface with respect to the front and back direction is set to 5 ° to 15 °.

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