JPH05230662A - Synthetic resin composite molding - Google Patents

Abstract

PURPOSE:To provide the synthetic resin composite molding which allows the easy insertion of the element into through holes and can freely be determined in the mounting direction of the elements. CONSTITUTION:This synthetic resin composite molding is so formed as to have an easily platable resin molding 1 which is formed of an easily platable synthetic resin to a circuit pattern shape, the through holes 2, 2a, 2b which are formed in the element mounting part of the easily platable resin molding 1, a hardly platable resin molding 3 which is formed of a hardly platable resin around the easily platable resin molding 1 and a projecting part 4 which is formed on the hardly platable resin molding 3 near the element mounting part and has an arc-shaped section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin composite molded article, and more particularly to a synthetic resin composite molded article in which the mounting direction of an element can be freely determined.

[0002]

2. Description of the Related Art As a conventional plastic molded product, injection-molding an easily-platable resin is followed by injection-molding a hard-to-plate resin to form a composite injection-molded article, and the exposed surface of the easily-platable resin is electroless plated. There is a plastic molded article having a patterned metal plating layer used for applications such as electric circuits.

As shown in FIG. 4, a plastic molded product formed by a conventional method is formed into a circuit pattern and has an easily plateable resin molded body 1 having a through hole 2 in an element mounting portion and an easily plated plate. 4 has a hard-to-plate resin molding 3 formed around the resin molding 1, and as shown in FIG. 4B, has two planes 41 and 43 parallel to the reference plane and an inclined surface 42. As a result, it is formed three-dimensionally with respect to the front direction.

FIG. 5 (a) is an enlarged view of a portion of the through hole 2 in FIG. 4 (c), and FIG. 5 (b) is a sectional view thereof. Through hole 2
Is formed with an inner wall perpendicular to the plane 43, and the element is inserted in the element insertion direction 10. Figure 5
In (a) and (b), the metal plating layer 8 applied to the surface of the easily-platable resin molding 1 is shown. FIG. 6 shows a synthetic resin composite molded product obtained by modifying FIG. 4, and the plane 43 is an inclined surface 43.
The inclined surfaces 43A and 43B are integrally formed with A and 43B, and have the through holes 2 perpendicular to the surfaces. By using this composite molded article, the elements can be mounted in different directions. In FIGS. 5 and 6, the same parts as those in FIG. 4 are designated by the same reference numerals, and a duplicate description will be omitted.

The easily-platable resin is generally an engineering plastic, for example, polycarbonate, polyamide, polyetherimide, polysulfone, polyethersulfone, polysulfone, polyethersulfone, polyalsulfone, polyphenylene sulfide,
Selected from polyarylate, polyethylene terephthalate, polybutylene terephthalate, polyether ketone, polyether ether ketone, or liquid crystal polymer, novacurate (trade name), Vectra (trade name), phenol resin, epoxy resin, diallyl phthalate resin, etc., A filler such as glass fiber, potassium titanate fiber or calcium carbonate may be added.

Since it is necessary to form a circuit pattern-shaped metal plating layer on the above-mentioned material, it is preferable to use a material that is easily attacked by a specific solvent or chemicals and is easily roughened. Further, an electroplating resin in which a noble metal plating catalyst such as gold or silver is added to the electroplating resin is used so that a metal plating layer is selectively formed on the surface of the electroplating resin by electroless plating. There is a method and a method of applying a catalyst after roughening the surface of the easily-platable resin molding.

The hard-to-plate resin can be selected and used from engineering plastics like the easily-platable resin, but the molding temperature is preferably lower than that of the easily-platable resin.

In order to form the above-mentioned plastic molded product, a composite injection molded product having an easy-platable resin molded product with a through-plated resin compounded by injection-molding a difficult-platable resin after injection molding To form. Electroless plating is applied to the formed composite injection-molded article.

When subjecting the composite injection-molded body to electroless plating, stains on the exposed portion of the easily-platable resin molded body are removed, and if necessary, for example, treated with NN dimethylformamide, and then chromium. The surface is roughened with an etching solution such as acid / sulfuric acid, calcium hydroxide, hydrofluoric acid / nitric acid, or acidic ammonium fluoride / nitric acid.

After pressing the exposed portion of the roughened easy-plating resin molding, electroless plating is performed to form a metal plating layer to be a circuit pattern on the surface of the exposed portion of the easy-plating resin molding. To be done.

[0011]

However, according to the conventional plastic molded product in which the element can be mounted in different directions, the through hole provided in the inclined surface is inclined with respect to the die removing direction. Since it is provided, the core of the mold needs to be slidable when the through hole is deep. Therefore, it is an object of the present invention to provide a composite molded article that can be manufactured without using a mold having a special structure and can mount elements in different directions.

[0012]

According to the present invention, in order to manufacture a composite molded article in which elements can be mounted in different directions by using an ordinary mold, the surface of the non-plating resin molded article has a predetermined standard. On the first surface when a through hole is provided in the second surface, the first surface coinciding with the surface and the second surface inclined at a predetermined angle with the first surface. There is provided a synthetic resin composite molded article having an inner wall which is parallel to the perpendicular line set in (1) and does not come into contact with a straight line penetrating therethrough.

[0013]

According to the synthetic resin composite molded article of the present invention, since the inner wall is formed so as to pass through the through hole and not come into contact with the straight line parallel to the vertical line of the reference plane, the projection forming the through hole is It can be provided in the mold so as to be parallel to the straight line. Therefore, if you remove the mold in parallel with the straight line,
The protrusion can be smoothly removed from the inner wall of the through hole, and the core does not need to be slid.

[0014]

Example 1 A synthetic resin composite molded article of the present invention will be described in detail below with reference to the drawings. FIG. 1 (a) shows an embodiment of a synthetic resin composite molded article of the present invention, which is an easily-platable resin molded body 1 formed of an easily-platable resin in a circuit pattern and an easily-platable resin molded body 1. Through-holes 2, 2a, 2b formed in the element mounting portion, and a hard-to-plate resin molded body 3 formed around the easily-platable resin molded body 1 made of a hard-to-plat resin.
As shown in FIGS. 1 (b) and 1 (c), the molding surfaces 5, 6 and 6 are formed on the difficult-plating resin molding 3 near the element mounting portion and have the projection 4 having an arc-shaped cross section. 7 is formed three-dimensionally with a predetermined inclination.

The through hole 2b in the molding surface 7 is shown in FIG.
As shown in (b), the inner wall is formed so as to be inclined with respect to the molding surface 7, and a metal plating layer 8 that covers the easily plateable resin molding 1 of the composite molding is formed ( In FIG. 1, illustration of the metal plating layer 8 is omitted).

In order to form the synthetic resin composite molded article in the present embodiment, first, easy plating made of polyether sulfone containing 0.1% by weight of palladium as a catalyst for electroless plating and 20% by weight of glass fiber as a filler. Resin
Injection molding is performed at a mold temperature of 150 ° C and an injection molding temperature of 380 ° C. At the time of this injection molding, the portions to be the through holes 2a and 2b are molded by a mold (not shown) so as to have an inner wall parallel to the perpendicular of the reference plane.

Next, a difficult-plating resin made of polyphenylene sulfide containing 30% by weight of glass fiber as a filler is exposed at a mold temperature of 100 ° C. and an injection molding temperature of 300 ° C. to form a circuit pattern on the exposed surface of the easily-plating resin. By injection molding as described above, a composite resin molded body is formed.

The outer surface of the formed composite resin molded body was degreased, immersed in N--N dimethylformamide for 2 minutes, and then immersed in a chromic acid / sulfuric acid etching solution at a temperature of 60.degree.
Immersion is performed for a minute to perform etching to roughen the exposed surface of the composite resin molded body.

The exposed surface of the roughened composite resin molded body is again subjected to degreasing treatment, washed with water, and then electroless plated. As a result, 30 μm of copper is deposited on the exposed surface to form a circuit pattern-shaped metal plating layer. This metal plating layer is also formed on the exposed portion of the easily-platable resin molding on the inner wall of the through hole.

According to this embodiment, by forming the through holes 2a, 2b having the inner walls parallel to the perpendicular of the reference plane in the easily-platable resin molding 1, the mold can be removed in the direction of the arrow 10. Therefore, it is possible to perform molding work using a normal mold. Further, since the element is positioned by the protrusion 4 formed on the mounting surface of the element, the soldering work when fixing the element can be easily performed.

Further, as shown in FIGS. 3 (a) and 3 (b), the openings in the molding surface 7 may be enlarged to form tapered through holes 2a and 2b.

[0022]

As described above, according to the synthetic resin composite molded article of the present invention, the surface of the non-plating resin molded body has the first surface which coincides with the predetermined reference surface and the first surface and the predetermined surface. Has a second surface inclined at an angle of, and when a through-hole is provided in the second surface, it contacts a straight line parallel to and perpendicular to the perpendicular line set on the first surface. Since the inner wall is provided, the composite molded article in which the elements can be mounted in different directions can be manufactured with a normal mold.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a synthetic resin composite molded article of the present invention.

FIG. 2 is an explanatory view showing through holes of the synthetic resin composite molded article of the present invention.

FIG. 3 is an explanatory view showing a modified example of the through hole of the synthetic resin composite molded article of the present invention.

FIG. 4 is an explanatory view showing a conventional synthetic resin composite molded article.

FIG. 5 is an explanatory view showing through holes of a conventional synthetic resin composite molded article.

FIG. 6 is an explanatory view showing a conventional synthetic resin composite molded article.

[Explanation of symbols]

1 Easy-plating resin molding 2, 2
a, 2b Through hole 3 Difficult-to-plate resin molding 4 Protrusions 5, 6, 7 Molding surface 8 Metal plating layer 10 Die cutting direction 41, 4
3 Planes 42, 43A, 43B Inclined surface

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Synthetic resin composite molded article

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin composite molded article, and more particularly to a synthetic resin composite molded article in which the mounting direction of an element can be freely determined.

[0002]

2. Description of the Related Art As a conventional plastic molded product, injection-molding an easily-platable resin is followed by injection-molding a hard-to-plate resin to form a composite injection-molded article, and the exposed surface of the easily-platable resin is electroless plated. There is a plastic molded article having a patterned metal plating layer used for applications such as electric circuits.

As shown in FIG. 8 , a plastic molded product formed by a conventional method is formed into a circuit pattern and has an easily plateable resin molded body 1 having a through hole 2 in an element mounting portion and an easily plated plate. Having a difficult-to-plate resin molded body 3 formed around the flexible resin molded body 1 and located at the cut portion bb
2 cut parallel to the reference plane as shown in FIG.
By having the two flat surfaces 41 and 43 and the inclined surface 42,
It is formed three-dimensionally with respect to the front direction. Furthermore, this
As shown in Fig. 10, the plastic molded product of
It is formed in a plane at the cut portion c-c.

FIG. 11 is an enlarged view of the through hole 2 portion of FIG.
Show. FIG. 12 shows a sectional view taken along the line bb. The through hole 2 is formed to have an inner wall perpendicular to the plane 43, and the element is inserted in the element insertion direction 10.
11 and 12 , the metal plating layer 8 applied to the surface of the easily-platable resin molded body 1 is shown. Figure 13
Fig. 14 shows a synthetic resin composite molded product obtained by deforming 8
The cutting | disconnection figure in the part bb is shown. At the cutting part b-b
The plastic molded product has flat surfaces 41 and 43 and an inclined surface 42.
Have The flat surface 43 is cut at the cutting portion cc.
15, the inclined surfaces 43A and 43B are integrally formed with each other, and the inclined surfaces 43A and 43B have through holes 2 perpendicular to the surfaces. By using this composite molded article, the elements can be mounted in different directions. Note that FIG.
1 and FIG. 13 that are the same as those in FIG. 8 are denoted by the same reference numerals, and a duplicate description will be omitted.

The easily-platable resin is generally an engineering plastic, for example, polycarbonate, polyamide, polyetherimide, polysulfone, polyethersulfone, polysulfone, polyethersulfone, polyalsulfone, polyphenylene sulfide,
Selected from polyarylate, polyethylene terephthalate, polybutylene terephthalate, polyether ketone, polyether ether ketone, or liquid crystal polymer, novacurate (trade name), Vectra (trade name), phenol resin, epoxy resin, diallyl phthalate resin, etc., A filler such as glass fiber, potassium titanate fiber or calcium carbonate may be added.

Since it is necessary to form a circuit pattern-shaped metal plating layer on the above-mentioned material, it is preferable to use a material that is easily attacked by a specific solvent or chemicals and is easily roughened. Further, an electroplating resin in which a noble metal plating catalyst such as gold or silver is added to the electroplating resin is used so that a metal plating layer is selectively formed on the surface of the electroplating resin by electroless plating. There is a method and a method of applying a catalyst after roughening the surface of the easily-platable resin molding.

The hard-to-plate resin can be selected and used from engineering plastics like the easily-platable resin, but the molding temperature is preferably lower than that of the easily-platable resin.

In order to form the above-mentioned plastic molded product, a composite injection molded product having an easy-platable resin molded product with a through-plated resin compounded by injection-molding a difficult-platable resin after injection molding To form. Electroless plating is applied to the formed composite injection-molded article.

When subjecting the composite injection-molded body to electroless plating, stains on the exposed portion of the easily-platable resin molded body are removed, and if necessary, for example, treated with NN dimethylformamide, and then chromium. The surface is roughened with an etching solution such as acid / sulfuric acid, calcium hydroxide, hydrofluoric acid / nitric acid, or acidic ammonium fluoride / nitric acid.

After pressing the exposed portion of the roughened easy-plating resin molding, electroless plating is performed to form a metal plating layer to be a circuit pattern on the surface of the exposed portion of the easy-plating resin molding. To be done.

[0011]

However, according to the conventional plastic molded product in which the element can be mounted in different directions, the through hole provided in the inclined surface is inclined with respect to the die removing direction. Since it is provided, the core of the mold needs to be slidable when the through hole is deep. Therefore, it is an object of the present invention to provide a composite molded article that can be manufactured without using a mold having a special structure and can mount elements in different directions.

[0012]

According to the present invention, in order to manufacture a composite molded article in which elements can be mounted in different directions by using an ordinary mold, the surface of the non-plating resin molded article has a predetermined standard. On the first surface when a through hole is provided in the second surface, the first surface coinciding with the surface and the second surface inclined at a predetermined angle with the first surface. There is provided a synthetic resin composite molded article having an inner wall which is parallel to the perpendicular line set in (1) and which does not come into contact with a straight line passing therethrough.

[0013]

According to the synthetic resin composite molded article of the present invention, since the inner wall is formed so as to pass through the through hole and not come into contact with the straight line parallel to the vertical line of the reference plane, the projection forming the through hole is It can be provided in the mold so as to be parallel to the straight line. Therefore, if you remove the mold in parallel with the straight line,
The protrusion can be smoothly removed from the inner wall of the through hole, and the core does not need to be slid.

[0014]

Example 1 A synthetic resin composite molded article of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of a synthetic resin composite molded article of the present invention, in which an easily-platable resin molded body 1 formed of an easily-platable resin in a circuit pattern and an element mounting of the easily-platable resin molded body 1 are shown. Through holes 2, 2 formed in the
a, 2b and a resin-plating product 1 that is easily plated with a resin that is difficult to plate
2 and FIG. 3 having a hard-to-plate resin molded body 3 formed around the metal and a hard-to-platable resin molded body 3 in the vicinity of the element mounting part and having an arc-shaped cross section . As shown, the molding surfaces 5, 6 and 7 are three-dimensionally formed with a predetermined inclination.

The through hole 2b in the molding surface 7 is shown in FIG.
As shown in FIG. 5 and FIG. 5 , the inner wall is formed with an inclination with respect to the molding surface 7, and a metal plating layer 8 that covers the easily-platable resin molding 1 of the composite molding is formed ( 2 and 3 , the metal plating layer 8 is not shown).

In order to form the synthetic resin composite molded article in the present embodiment, first, easy plating made of polyether sulfone containing 0.1% by weight of palladium as a catalyst for electroless plating and 20% by weight of glass fiber as a filler. Resin
Injection molding is performed at a mold temperature of 150 ° C and an injection molding temperature of 380 ° C. At the time of this injection molding, the portions to be the through holes 2a and 2b are molded by a mold (not shown) so as to have an inner wall parallel to the perpendicular of the reference plane.

Next, a difficult-plating resin made of polyphenylene sulfide containing 30% by weight of glass fiber as a filler is exposed at a mold temperature of 100 ° C. and an injection molding temperature of 300 ° C. to form a circuit pattern on the exposed surface of the easily-plating resin. By injection molding as described above, a composite resin molded body is formed.

The outer surface of the formed composite resin molded body was degreased, immersed in N--N dimethylformamide for 2 minutes, and then immersed in a chromic acid / sulfuric acid etching solution at a temperature of 60.degree.
Immersion is performed for a minute to perform etching to roughen the exposed surface of the composite resin molded body.

The exposed surface of the roughened composite resin molded body is again subjected to degreasing treatment, washed with water, and then electroless plated. As a result, 30 μm of copper is deposited on the exposed surface to form a circuit pattern-shaped metal plating layer. This metal plating layer is also formed on the exposed portion of the easily-platable resin molding on the inner wall of the through hole.

According to this embodiment, by forming the through holes 2a, 2b having the inner walls parallel to the perpendicular of the reference plane in the easily-platable resin molding 1, the mold can be removed in the direction of the arrow 10. Therefore, it is possible to perform molding work using a normal mold. Further, since the element is positioned by the protrusion 4 formed on the mounting surface of the element, the soldering work when fixing the element can be easily performed.

Further, as shown in FIGS. 6 and 7 , the openings in the molding surface 7 may be enlarged to form the through holes 2a, 2b formed in a tapered shape.

[0022]

As described above, according to the synthetic resin composite molded article of the present invention, the surface of the non-plating resin molded body has the first surface which coincides with the predetermined reference surface and the first surface and the predetermined surface. Has a second surface inclined at an angle of, and when a through-hole is provided in the second surface, it contacts a straight line parallel to and perpendicular to the perpendicular line set on the first surface. Since the inner wall is provided, the composite molded article in which the elements can be mounted in different directions can be manufactured with a normal mold.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a synthetic resin composite molded article of the present invention.

FIG. 2 is a sectional view of the synthetic resin composite molded article of the present invention in FIG.
It is explanatory drawing which shows the cross section bb.

FIG. 3 is a sectional view of the synthetic resin composite molded article of the present invention in FIG.
It is explanatory drawing which shows the cross section cc.

FIG. 4 is a view showing a through hole of the synthetic resin composite molded article of the present invention .
It is a clear view.

5 is a cross section of the synthetic resin composite molded article of the present invention in FIG.
It is explanatory drawing which shows the cross section bb.

FIG. 6 shows a modified example of the synthetic resin composite molded article of the present invention .
It is explanatory drawing which shows a through hole.

7 is a cross sectional view of the synthetic resin composite molded article of the present invention in FIG.
It is explanatory drawing which shows the cross section bb.

FIG. 8 is an explanatory view showing a conventional synthetic resin composite molded article.
It

FIG. 9: Cutting of a conventional synthetic resin composite molded product in FIG.
It is explanatory drawing which shows the surface bb.

FIG. 10 is a view of a conventional synthetic resin composite molded article in FIG.
It is explanatory drawing which shows the cross section cc.

FIG. 11 is a view showing a through hole of a conventional synthetic resin composite molded article.
It is a clear view.

FIG. 12 shows a conventional synthetic resin composite molded article in FIG.
It is explanatory drawing which shows the cutting surface bb.

FIG. 13 is an explanatory view showing a conventional synthetic resin composite molded article.
It

FIG. 14 shows a conventional synthetic resin composite molded article in FIG.
It is explanatory drawing which shows the cutting surface bb.

FIG. 15 shows a conventional synthetic resin composite molded article in FIG.
It is explanatory drawing which shows the cutting plane cc.

[Explanation of symbols] 1 easy-plating resin molded product 2, 2
a, 2b Through hole 3 Difficult-to-plate resin molding 4
Protrusions 5, 6, 7 Forming surface 8
Metal plating layer 10 Die removal direction 41,
43 flat surface 42, 43A, 43B inclined surface

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical indication H05K 3/42 A 7511-4E // B29L 31:34 4F (72) Inventor Toshiyuki Oagu Hitachi, Ibaraki Prefecture 5-1-1, Hidaka-cho, Higashi, Hitachi, Ltd. Power Systems Laboratory (72) Inventor Hideki Asano 5-1-1, Hidaka-cho, Hitachi, Ibaraki Prefecture, Hitachi, Ltd. Power Systems Laboratory

Claims (3)

[Claims] 1. A plating-resistant resin molded body, and a plating-resistant resin molded body which is integrally molded with the plating-resistant resin molded body and has an exposed surface corresponding to a circuit pattern on the surface thereof. A metal plating layer is formed on the surface of the resin molding, and the composite resin molding has a through hole for mounting an element, which is covered with the metal plating, is formed at a predetermined position of the easily plating resin molding. The surface of the hardly-platable resin molded body has a first surface that matches a predetermined reference surface, and a second surface that is inclined at a predetermined angle with the first surface, When the through hole is provided on the second surface, the synthetic resin composite molded article has an inner wall that is parallel to a perpendicular line set on the first surface and does not come into contact with a straight line penetrating therethrough. .. 2. The synthetic resin composite molded article according to claim 1, wherein the through hole has an inner wall parallel to the straight line. 3. The synthetic resin composite molded article according to claim 1, wherein the second surface has a vertical wall for supporting the element, which prevents the element from falling off due to the inclination based on the predetermined angle.