JP2020111043A - Molding, composite molding and manufacturing method of composite molding - Google Patents
Molding, composite molding and manufacturing method of composite molding Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000465 moulding Methods 0.000 title abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 68
- 239000011347 resin Substances 0.000 claims abstract description 68
- 241000251468 Actinopterygii Species 0.000 claims abstract description 23
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 16
- 238000001746 injection moulding Methods 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011256 inorganic filler Substances 0.000 description 5
- 229910003475 inorganic filler Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004740 DURAFIDE® Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
本発明は、成形体、複合成形体および複合成形体の製造方法に関する。 The present invention relates to a molded product, a composite molded product, and a method for producing a composite molded product.
近年、自動車、電気製品、産業機器等をはじめとした分野では、二酸化炭素の排出量削減、製造コストの削減等の要請に応えるため、金属成形体を樹脂成形体に置き換える動きが広がっている。それに伴い、一の樹脂成形体と他の樹脂成形体または金属成形体等とを強固に一体化する技術の提供が求められる。 In recent years, in fields such as automobiles, electrical products, and industrial equipment, in order to meet demands for reduction of carbon dioxide emissions, reduction of manufacturing cost, and the like, there is a growing movement to replace metal moldings with resin moldings. Along with this, it is required to provide a technique for firmly integrating one resin molded body with another resin molded body or a metal molded body.
特許文献１は、一の樹脂成形体と他の成形体とを一体化して複合成形品を製造する方法を開示する。この方法は、繊維状無機充填剤を含有する樹脂成形品に樹脂の一部除去を行い、側面から無機充填剤が露出された溝を形成して溝付き樹脂成形体を得た後、溝付き樹脂成形体の溝を有する面を接触面として他の成形体と一体化する。溝付き樹脂成形体を得る際、樹脂の一部除去は、レーザ照射によって行われる。この方法によると、溝で露出する無機充填剤が溝付き樹脂成形体及び他の成形体の破壊を抑えるアンカーの役割を果たし、結果として複合成形体の強度を著しく高めることができる。 Patent Document 1 discloses a method of manufacturing a composite molded article by integrating one resin molded body and another molded body. This method involves removing a part of the resin from a resin molded product containing a fibrous inorganic filler, forming a groove in which the inorganic filler is exposed from the side surface to obtain a grooved resin molded body, and then forming a grooved resin molded body. The grooved surface of the resin molded body is used as a contact surface to be integrated with another molded body. When obtaining the grooved resin molded body, the resin is partially removed by laser irradiation. According to this method, the inorganic filler exposed in the groove serves as an anchor for suppressing the destruction of the grooved resin molded body and other molded bodies, and as a result, the strength of the composite molded body can be remarkably increased.
また、特許文献２では、第１成形体に溝を形成するにあたって、溝を凹部、溝間を凸部として、第２樹脂の流動体が射出された方向の凸部、凹部等の溝の形状を規定することにより、複合成形体の接合強度を向上させる技術が提案されている。 Further, in Patent Document 2, when forming the groove in the first molded body, the shape of the groove such as the convex portion and the concave portion in the direction in which the fluid of the second resin is injected, with the groove being a concave portion and the gap between the convex portions being a convex portion. Has been proposed to improve the bonding strength of the composite molded body.
このような溝付き第１成形体を使用する複合成形体では、非常に接合強度を向上させることができたが、溝の形状、大きさによっては、射出成形時に空気を巻き込み、その空気が気泡となって複合成形体に大量に残ってしまうという問題が発生した。その気泡が多い場合には、接合強度や気密性の低下を引き起こし、さらには透明な複合成形体では外観を劣化させることにもなり、大きな課題となった。 In the composite molded body using such a grooved first molded body, the bonding strength could be greatly improved. However, depending on the shape and size of the groove, air is entrained during the injection molding, and the air is bubbled. Then, a problem occurs that a large amount remains in the composite molded body. When there are many air bubbles, the bonding strength and airtightness are deteriorated, and the appearance of the transparent composite molded body is deteriorated, which is a big problem.
本発明は、以上のような課題を解決するためになされたものであり、その目的は、複合成形体の製造時に残る気泡の発生を抑制することのできる溝形状を有する第１成形体、そして気泡の発生が抑えられた複合成形体およびその複合成形体の製造方法を提供することである。 The present invention has been made to solve the above problems, and an object thereof is to provide a first molded product having a groove shape capable of suppressing the generation of bubbles remaining during the production of a composite molded product, and It is an object of the present invention to provide a composite molded body in which generation of bubbles is suppressed and a method for producing the composite molded body.
本発明者らは、下記によって上記課題を解決した。 The present inventors have solved the above problems by the following.
１． 第２樹脂を射出成形により複合するための溝付き第１成形体であって、該溝が、該第２樹脂射出成形時の流動体の第１成形体に対する流動方向Ｘに対して魚の骨形状である、溝付き第１成形体。
２． 該魚の骨形状が、該流動方向Ｘに対して上流側が頭、下流側が尾となる向きである、前記１記載の溝付き第１成形体。
３． 前記溝の少なくとも３０％以上の本数の溝形成方向Ｍが、前記流動方向Ｘと、流動中心から見て該流動方向Ｘに垂直な方向Ｙ１またはＹ２の間にある、前記１または２記載の溝付き第１成形体。
４． 該流動体の先頭部分の法線方向Ｈと該溝形成方向Ｍとのなす角θが０°≦θ＜４５°である、前記１〜３いずれかに記載の溝付き第１成形体。
５． 溝付き第１成形体と第２樹脂成形体との複合成形体であって、該溝が、魚の骨形状である、複合成形体。
６． 第１成形体に第２樹脂を射出成形し複合成形体を製造する方法であって、第１成形体に魚の骨形状の溝を形成する工程、
該魚の骨形状の溝を有する第１成形体に、魚の頭から尾の向きであって背骨方向に第２樹脂を射出成形する工程、を有する複合成形体の製造方法。
1. A first molded body with a groove for compounding a second resin by injection molding, wherein the groove has a fish bone shape in the flow direction X of the fluid during the second resin injection molding with respect to the first molded body. The first molded body with a groove.
2. The grooved first molded body according to 1, wherein the fish has a bone shape in which the upstream side is the head and the downstream side is the tail with respect to the flow direction X.
3. The 1 or 2 above, wherein at least 30% or more of the grooves are formed in a groove forming direction M between the flow direction X and a direction Y 1 or Y 2 perpendicular to the flow direction X when viewed from the flow center. First molded body with groove.
4. The grooved first molded body according to any one of 1 to 3 above, wherein an angle θ formed by a normal line direction H of a leading portion of the fluid and the groove forming direction M is 0°≦θ<45°.
5. A composite molded body comprising a grooved first molded body and a second resin molded body, wherein the groove has a fish bone shape.
6. A method for producing a composite molded body by injection-molding a second resin on a first molded body, the method comprising: forming a fish-bone-shaped groove in the first molded body;
A method for producing a composite molded body, comprising the step of injection-molding a second resin in the spine direction from the head of the fish to the tail of the first molded body having the fish bone-shaped groove.
本発明によると、射出成形時に空気を巻き込み、その空気が気泡となって複合成形体に大量に残ってしまうという課題を解決し、外観の劣化を抑制し安定した接合強度を得ることができる。 According to the present invention, it is possible to solve the problem that air is entrained during injection molding and a large amount of the air remains in the composite molded body, and deterioration of the appearance is suppressed and stable bonding strength can be obtained.
以下、本発明の実施形態について詳細に説明するが、本発明は、以下の実施形態に何ら限定されるものではなく、本発明の目的の範囲内において、適宜変更を加えて実施することができる。なお、説明が重複する箇所については、適宜説明を省略する場合があるが、発明の要旨を限定するものではない。 Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention. .. It should be noted that although the description may be omitted as appropriate for the overlapping description, it does not limit the scope of the invention.
＜第１成形体＞
第１成形体は、通常使用される金属、ガラス等の無機成形体や樹脂成形体を使用することができる。
金属としては、アルミニウム、マグネシウム、ステンレス鋼、銅、チタン等を挙げることができる。金属は、金属合金から構成されてもよい。また、金属材料の表面には、陽極酸化処理等の表面処理や塗装がされていてもよい。軽量、強度の点からアルミニウム、マグネシウム、銅、チタンが好ましく、端子等の導電性が必要とされる用途においてはアルミニウム、銅がより好ましく、銅が特に好ましい。また、携帯端末筐体等の薄肉での剛性が要求される用途においてはマグネシウム、チタンが好ましく、チタンが特に好ましい。
<First molded body>
As the first molded body, a commonly used inorganic molded body such as metal or glass, or a resin molded body can be used.
Examples of the metal include aluminum, magnesium, stainless steel, copper, titanium and the like. The metal may be composed of a metal alloy. Further, the surface of the metal material may be subjected to surface treatment such as anodizing treatment or coating. Aluminum, magnesium, copper, and titanium are preferable from the viewpoint of light weight and strength, and aluminum and copper are more preferable and copper is particularly preferable in applications such as terminals in which conductivity is required. In addition, magnesium and titanium are preferable, and titanium is particularly preferable, in applications such as mobile terminal housings that require rigidity with a thin wall.
樹脂成形体の場合の樹脂は、熱可塑性であれば、特に限定されない。好適な樹脂の例として、ポリアセタール（ＰＯＭ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリフェニレンサルファイド（ＰＰＳ）、液晶ポリマー（ＬＣＰ）等が挙げられる。樹脂に、無機充填剤であるガラス繊維等を混合した強化樹脂であっても良い。 The resin in the case of the resin molded body is not particularly limited as long as it is thermoplastic. Examples of suitable resins include polyacetal (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), and the like. It may be a reinforced resin in which resin is mixed with glass fiber or the like which is an inorganic filler.
図１は、本発明の実施形態である第１成形体１が有する魚の骨形状の溝３を示している。図１中の２は第１成形体上に射出成形される第２樹脂の流動体であり、その流動する先頭（フローフロントともいう）は、略放物線を形成している。魚の骨形状の溝３は、流動体の先頭の中心線（流動中心ＣともいいＸで示す方向に連続する）を背骨とすると、その背骨から第２樹脂の流動方向Ｘに垂直な第１成形体１の側面外側方向Ｙ１、Ｙ２方向に、魚の骨形状を有し傾斜している。なお、ここで背骨は必ずしも必要ではない。魚の骨形状は、流動方向Ｘに対して上流側が頭、下流側が尾となる向きである。
魚の骨は、直線であっても曲線であっても良く、その第１成形体１の側面端部まで溝が達する連続した形状であればよい。
FIG. 1 shows a fish bone-shaped groove 3 included in a first molded body 1 according to an embodiment of the present invention. Reference numeral 2 in FIG. 1 denotes a fluid of the second resin that is injection-molded on the first molded body, and the leading portion (also referred to as the flow front) of the fluid forms a substantially parabola. The fish bone-shaped groove 3 is a first molding that is perpendicular to the flow direction X of the second resin from the spine, where the spine is the centerline of the beginning of the fluid (continuous with the direction indicated by X, also called the flow center C). It has the shape of a fish bone and is inclined in the lateral direction Y 1 and Y 2 direction of the body 1. The spine is not always necessary here. The bone shape of the fish is such that the upstream side is the head and the downstream side is the tail with respect to the flow direction X.
The fish bone may be a straight line or a curved line as long as it has a continuous shape in which the groove reaches the side end portion of the first molded body 1.
さらに図１の魚の骨形状は、図２で示すように溝の少なくとも３０％以上の本数の溝形成方向Ｍが、流動方向Ｘと、流動中心Ｃから見て流動方向Ｘに垂直な方向Ｙ１またはＹ２の間にあることが好ましい。当該の範囲を満たす方向の本数の割合は、５０％以上であることが好ましく、６０％以上であることがより好ましく、７０％以上であることがさらに好ましく、８０％以上であることが特に好ましく、９０％以上であることが最も好ましい。 Further, in the fish bone shape shown in FIG. 1, as shown in FIG. 2, at least 30% or more of the grooves have a groove forming direction M, which is a direction Y 1 perpendicular to the flow direction X and the flow direction X when viewed from the flow center C. Alternatively, it is preferably between Y 2 . The ratio of the number of lines in the direction satisfying the range is preferably 50% or more, more preferably 60% or more, further preferably 70% or more, particularly preferably 80% or more. Most preferably 90% or more.
図２のＡ点、Ｂ点は、第２樹脂流動体のフローフロントのＹ１方向およびＹ２方向の任意の２点を表している。Ａ点では、第１成形体の溝の方向ＭＡは、流動方向Ｘと側面外側方向Ｙ１の間に形成される。同様にＢ点では、溝の方向ＭＢは、流動方向Ｘと側面外側方向Ｙ２の間に形成される。ＭＡ、ＭＢは、流動方向ＸとＹ１方向、Ｙ２方向の間にあることから、Ｘ方向、Ｙ１方向およびＹ２方向とは、溝の始点付近および終点付近を除き、通常は一致しない。 Point A and point B in FIG. 2 represent arbitrary two points in the Y 1 direction and the Y 2 direction of the flow front of the second resin fluid. At the point A, the direction M A of the groove of the first molded body is formed between the flow direction X and the lateral side outer direction Y 1 . Similarly, at the point B, the groove direction M B is formed between the flow direction X and the lateral side outer direction Y 2 . Since M A and M B are between the flow direction X and the Y 1 direction and the Y 2 direction, the X direction, the Y 1 direction, and the Y 2 direction are usually except the vicinity of the start point and the end point of the groove. It does not match.
さらに溝の方向Ｍは、第２樹脂の流動体のフローフロントの法線方向Ｈと該溝形成方向Ｍとのなす角θが０°≦θ＜４５°であることが好ましく、０°≦θ＜３０°であることがより好ましく、０°≦θ＜２０°であることがさらに好ましく、０°≦θ＜１５°であることが特に好ましく、０°≦θ＜１０°であることが最も好ましい。 Further, in the groove direction M, the angle θ formed by the normal direction H of the flow front of the fluid of the second resin and the groove forming direction M is preferably 0°≦θ<45°, and 0°≦θ <30° is more preferable, 0°≦θ<20° is further preferable, 0°≦θ<15° is particularly preferable, and 0°≦θ<10° is most preferable. preferable.
なお、上記の通り角θは、法線方向Ｈと溝形成方向Ｍとのなす角であり、その値は絶対値として扱う。すなわち法線方向Ｈに対して溝形成方向Ｍが、時計回り方向に４５°未満の範囲にある場合、及び反時計回り方向に４５°未満の範囲にある場合のいずれをも含むものである。 As described above, the angle θ is an angle formed by the normal line direction H and the groove forming direction M, and its value is treated as an absolute value. That is, it includes both the case where the groove forming direction M is in the range of less than 45° in the clockwise direction with respect to the normal direction H and the case where it is in the range of less than 45° in the counterclockwise direction.
図２のＡ点では、Ａ点の法線方向をＨＡとすると溝の方向ＭＡは、θＡの範囲に形成することが好ましい。またＢ点では、Ｂ点の法線方向をＨＢとすると溝の方向ＭＢは、θＢの範囲に形成することが好ましい。 At point A in FIG. 2, it is preferable that the groove direction M A be formed in the range of θ A , where H A is the normal direction of the point. Further, at the point B , the groove direction M B is preferably formed in the range of θ B , where H B is the normal direction of the point B.
本発明の魚の骨形状として好ましく使用できる形状として、模式的に図３〜図１２の形状を挙げることができる。図３〜図９は、図１の魚の骨形状を適宜変形した溝を示している。図１０では、放射状パターンの中心部からピンゲートにより第１成形体上に第２樹脂を流動させ、同心円状に第２樹脂を流動させる場合に有効である溝を示している。図１０は、一見通常の魚の骨形状とは離れているが、中心を背骨とし第２樹脂が背骨から同心円状に流動することから、作用効果が一致しており、本発明の実施態様の一つとすることができる。 As a shape that can be preferably used as the bone shape of the fish of the present invention, the shapes shown in FIGS. 3 to 12 can be typically mentioned. 3-9 shows the groove|channel which deform|transformed the bone shape of the fish of FIG. 1 suitably. FIG. 10 shows grooves that are effective when the second resin is caused to flow from the center of the radial pattern onto the first molded body by a pin gate and the second resin is caused to flow concentrically. Although FIG. 10 is distant from the normal fish bone shape at first glance, the second resin flows concentrically from the spine with the center at the spine, so that the effects are the same, and one embodiment of the present invention is shown. Can be one.
図１１では、リング形状の第１成形体をリング形状の金型に配置し（（ａ）の状態）、金型（（ｂ）の状態）の一部のゲートから第２樹脂を流動させる場合に有効である溝を示している。図１２では、リング形状に溝を形成した第１成形体の全面（（ａ）の状態）に第２樹脂を流動させる場合（（ｂ）の状態）を示している。
溝の断面形状としては、通常知られている形状を適宜選択することができ、矩形・台形・Ｖ字・Ｕ字・円弧等であることが好ましい。溝の幅は５０〜２００μｍ、深さは１０〜３００μｍであることが好ましい。
In FIG. 11, when the ring-shaped first molded body is placed in a ring-shaped mold (state (a)) and the second resin is caused to flow from some gates of the mold (state (b)). Shows a groove that is effective for. FIG. 12 shows a case (the state of (b)) in which the second resin is caused to flow over the entire surface (the state of (a)) of the first molded body in which the groove is formed in the ring shape.
As the cross-sectional shape of the groove, a generally known shape can be appropriately selected, and it is preferably rectangular, trapezoidal, V-shaped, U-shaped, arc-shaped or the like. The groove preferably has a width of 50 to 200 μm and a depth of 10 to 300 μm.
＜溝付き第１成形体の製造方法＞
本発明の第１成形体の溝を形成する方法は、第１成形体製造時の金型により転写し溝形成する方法、第１成形体製造後にレーザ、切削、型押し、エッチング等により溝を形成する方法等が知られているが、通常のいかなる方法も使用することができる。特にレーザによる方法は、金型の準備を必要とせず細かな溝を製造できる点から好ましい。レーザによる方法を使用する場合、第１成形体にはレーザを吸収する化合物を含有させてもよい。
<The manufacturing method of the 1st molded object with a groove>
The method of forming the groove of the first molded body of the present invention includes a method of transferring the groove by a die used in manufacturing the first molded body to form the groove, and forming the groove by laser, cutting, embossing, etching or the like after manufacturing the first molded body. Although a forming method and the like are known, any ordinary method can be used. In particular, the method using a laser is preferable in that fine grooves can be manufactured without preparing a mold. When the laser method is used, the first molded body may contain a compound that absorbs laser.
さらに、複合成形体にかかる応力の方向がある程度想定できる場合は、レーザを第１成形体表面に対し、垂直に照射するだけでなく、斜めに照射することにより、応力方向に対するアンカー効果をより高めるようにして溝を形成してもよい。そして第１成形体表面に対し、垂直な溝と斜めの溝を併存させてもよい。 Further, when the direction of the stress applied to the composite molded body can be assumed to some extent, the laser is not only vertically irradiated to the surface of the first molded body but also obliquely irradiated, thereby further enhancing the anchor effect in the stress direction. The groove may be formed in this way. Then, a vertical groove and an oblique groove may coexist on the surface of the first molded body.
＜複合成形体＞
本発明の複合成形体は、第１成形体に第２樹脂成形体を結合することによって製造することができる。第１成形体への結合は、第１成形体に第２樹脂成形体を構成する第２樹脂を射出成形することによって製造することができる。
<Composite molded body>
The composite molded body of the present invention can be manufactured by bonding the second resin molded body to the first molded body. The connection to the first molded body can be manufactured by injection molding the second resin forming the second resin molded body on the first molded body.
第２樹脂成形体を構成する樹脂は、熱可塑性又は熱硬化性である。第１成形体を構成する第１樹脂と、第２樹脂成形体を構成する第２樹脂とは、同じであってもよいし、異なっていてもよい。第１成形体、第２樹脂成形体ともに、繊維状無機充填剤を含有する樹脂成形体であってもよく、その他公知の添加剤（酸化防止剤、安定剤、紫外線吸収剤、滑剤、離型剤、可塑剤、着色剤、強化材、靱性改良剤、流動性改良剤、耐加水分解性改良剤等）を含有する樹脂成形体であってもよい。 The resin forming the second resin molded body is thermoplastic or thermosetting. The first resin forming the first molded body and the second resin forming the second resin molded body may be the same or different. Both the first molded body and the second resin molded body may be resin molded bodies containing a fibrous inorganic filler, and other known additives (antioxidant, stabilizer, ultraviolet absorber, lubricant, release agent). Agent, plasticizer, colorant, reinforcing material, toughness improving agent, fluidity improving agent, hydrolysis resistance improving agent, etc.).
＜複合成形体の製造方法＞
まず第１成形体を構成する第１樹脂を溶融し、所望の形状を形成する金型によって射出成形する。この時金型に凹凸を設け、溝を形成してもよい。第１成形体の製造時に溝を形成しなかった場合は、その後レーザ等によって第１成形体の第２樹脂成形体と結合する面に所望に溝を形成する。ついで、溝を形成した溝付き第１成形体を金型に配置し、そこに第２樹脂成形体を構成する第２樹脂を流動し射出成形する。第１成形体への射出成形は、通常の条件を適宜選択することができる。
<Method for producing composite molded body>
First, the first resin that constitutes the first molded body is melted and injection-molded by a mold that forms a desired shape. At this time, the mold may be provided with irregularities to form grooves. If the groove is not formed at the time of manufacturing the first molded body, then a groove is formed as desired by a laser or the like on the surface of the first molded body to be joined to the second resin molded body. Next, the grooved first molded body having a groove is placed in a mold, and the second resin constituting the second resin molded body is flowed therein and injection molded. For injection molding of the first molded body, ordinary conditions can be appropriately selected.
以下、本発明を実施例によりさらに詳細に説明するが、本発明はこれらの実施例によって限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
図１３〜１６に示すように、第１成形体として、ガラス繊維を４０質量％含むポリフェニレンサルファイド樹脂（ポリプラスチックス株式会社製、ジュラファイド（登録商標）１１４０Ａ６）を用いて、シリンダー温度３２０℃、金型温度１４０℃、射出速度３０ｍｍ／ｓｅｃ、保圧力６０ＭＰａにて、幅１３ｍｍ×長さ４０ｍｍ×高さ３．２ｍｍの樹脂板を作製し、１３ｍｍ×４０ｍｍの面に流動方向Ｘだけの直線状溝、流動方向に垂直および水平な格子状溝、斜格子状溝、本発明の魚の骨形状の溝を形成した。 As shown in FIGS. 13 to 16, using a polyphenylene sulfide resin (DURAFIDE (registered trademark) 1140A6 manufactured by Polyplastics Co., Ltd.) containing 40% by mass of glass fiber as a first molded body, a cylinder temperature of 320° C., With a mold temperature of 140° C., an injection speed of 30 mm/sec, and a holding pressure of 60 MPa, a resin plate having a width of 13 mm, a length of 40 mm and a height of 3.2 mm is produced, and a linear shape only in the flow direction X is formed on a surface of 13 mm×40 mm. Grooves, grid-like grooves perpendicular and horizontal to the flow direction, oblique grid-like grooves, and fish-bone-shaped grooves of the present invention were formed.
溝は、レーザ照射により幅１００μｍ×深さ１００μｍ、溝間隔３００μｍのものを形成した（ただし、魚の骨形状の溝では、樹脂のフローフロントに合わせて溝の方向を変更している都合上、溝間隔が若干増減している箇所を有するが、ほぼ３００μｍとなるようにしている）。 The grooves were formed by laser irradiation to have a width of 100 μm×a depth of 100 μm and a groove interval of 300 μm (however, in the case of a fish bone-shaped groove, the direction of the groove is changed according to the resin flow front. (Although there is a portion where the interval is slightly increased or decreased, it is set to approximately 300 μm).
次いで、当該樹脂板を１３ｍｍ×４０ｍｍ×６．４ｍｍのキャビティ内に配置し、溝を形成した面上に第２樹脂が充填されるように、キャビティの１３ｍｍ×６．４ｍｍの面の一端側から、１３ｍｍ×４０ｍｍ×３．２ｍｍの空間に向けて、１３ｍｍ×２ｍｍのフィルムゲートで第２樹脂を射出した。ここで、残っている気泡が観察しやすいように、第２樹脂として透明なポリスチレン樹脂を使用し、シリンダー温度２２０℃、金型温度４０℃、射出速度２０ｍｍ／ｓｅｃ、保圧力６０ＭＰａで、１３ｍｍ×３．２ｍｍの射出成形をした。なお図１６ではθはすべての位置において０°であった。 Then, the resin plate is placed in a cavity of 13 mm x 40 mm x 6.4 mm, and from the one end side of the 13 mm x 6.4 mm surface of the cavity so that the second resin is filled on the grooved surface. The second resin was injected into the space of 13 mm×40 mm×3.2 mm with a film gate of 13 mm×2 mm. Here, a transparent polystyrene resin is used as the second resin so that the remaining bubbles can be easily observed, and the cylinder temperature is 220° C., the mold temperature is 40° C., the injection speed is 20 mm/sec, the holding pressure is 60 MPa, and the pressure is 13 mm× Injection molding of 3.2 mm was performed. In FIG. 16, θ was 0° at all positions.
＜結果＞
図１３〜１６は試料の結果を示す写真である。左側が光学顕微鏡による１．５倍の写真であり、右側が光学顕微鏡による８倍の写真である。白く見える部分が残った気泡部分である。
<Results>
13 to 16 are photographs showing the results of the samples. The left side is a 1.5× photo by an optical microscope, and the right side is an 8× photo by an optical microscope. The part that looks white is the remaining bubble part.
比較の試料の結果を示す図１３〜１５の写真では、残った気泡が観察されている。写真で示すように、直線状溝（１）、格子状溝（２）、斜格子状溝（３）では気泡の残りがはっきりと観察されたが、図１６の本発明の魚の骨形状の溝（トレッドパターン）（４）では、気泡はまったく観察されなかった。 Residual bubbles are observed in the photographs of FIGS. 13 to 15 showing the results of the comparative sample. As shown in the photograph, the remaining bubbles were clearly observed in the linear groove (1), the lattice groove (2), and the oblique lattice groove (3), but the fish bone-shaped groove of the present invention of FIG. 16 was observed. In the (tread pattern) (4), no bubbles were observed.
１ 第１成形体
２ 第２樹脂成形体
３ 溝
Ａ，Ｂ フローフロント放物線上の任意の２点
Ｃ フローフロントの円周の中心
Ｘ 第２樹脂の流動方向
Ｙ１、Ｙ２ Ｃから見て流動する第２樹脂流動方向Ｘに垂直な二つの方向
ＨＡ Ａ点での法線方向
ＭＡ Ａ点で形成された溝の方向
θＡ ＨＡとＭＡの成す角度
ＨＢ Ｂ点での法線方向
ＭＢ Ｂ点で形成された溝の方向
θＢ ＨＢとＭＢの成す角度
1 1st molded object 2 2nd resin molded object 3 groove
A, B Arbitrary two points on the flow front parabola C Center of the circumference of the flow front
X Flow direction of the second resin Two directions perpendicular to the flow direction X of the second resin flowing from the viewpoint of Y 1 and Y 2 C
Normal direction at H A A point Direction of groove formed at M A A point θ A H A angle between H A and M A
Direction of normal line at H B B point Direction of groove formed at M B B point θ B Angle between H B and M B
Claims (6)
該魚の骨形状の溝を有する第１成形体に、魚の背骨方向に第２樹脂を射出成形する工程、を有する複合成形体の製造方法。 A method for producing a composite molded body by injection-molding a second resin on a first molded body, comprising the step of forming a fish-bone-shaped groove in the first molded body,
A method for producing a composite molded body, which comprises a step of injection-molding a second resin in a fish spinal direction on a first molded body having a groove in the shape of a fish bone.
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