JP2007168214A - Resin molding - Google Patents

Resin molding Download PDF

Info

Publication number
JP2007168214A
JP2007168214A JP2005367660A JP2005367660A JP2007168214A JP 2007168214 A JP2007168214 A JP 2007168214A JP 2005367660 A JP2005367660 A JP 2005367660A JP 2005367660 A JP2005367660 A JP 2005367660A JP 2007168214 A JP2007168214 A JP 2007168214A
Authority
JP
Japan
Prior art keywords
resin
molded body
layer
cavity
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2005367660A
Other languages
Japanese (ja)
Inventor
Tomoji Mori
智司 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DaikyoNishikawa Corp
Original Assignee
DaikyoNishikawa Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaikyoNishikawa Corp filed Critical DaikyoNishikawa Corp
Priority to JP2005367660A priority Critical patent/JP2007168214A/en
Publication of JP2007168214A publication Critical patent/JP2007168214A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve the strength and rigidity of a protrusion and the molding body around the protrusion by preventing the occurrence of a crack in the vertical wall part of the protrusion in an expansion-molded resin molding. <P>SOLUTION: A plate body 15 is produced by a process in which while a fiber-incorporated thermoplastic resin R injected/packed in the cavity 37 of a mold 31 is solidified, by expanding the resin R by increasing the volume of the cavity, a skin layer 21 is formed on the surface and an expansion layer 23 having numbers of voids is formed in the inside. A positioning pin 25 protrusively formed in the plate body 15 is made of a solid layer 29 formed without increasing the volume of the cavity during the molding. An opening 25a is formed at the tip of the positioning pin 25, the tip side of a hollow part 27 is opened, and the hollow part 27 on the side of the base end of the positioning pin 25 is closed by the skin layer 21 of the plate body 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、中空部を有する筒状突出部が成形体本体に一体に突設されたパネル状の樹脂成形体の改良に関し、詳しくは、成形体本体の表面が樹脂密度の高いスキン層であり、内部が上記スキン層に比べて樹脂密度の低い膨張層である樹脂成形体に関するものである。   The present invention relates to an improvement in a panel-shaped resin molded body in which a cylindrical protrusion having a hollow portion is integrally projected on a molded body, and more specifically, the surface of the molded body is a skin layer having a high resin density. Further, the present invention relates to a resin molded body whose inside is an expanded layer having a lower resin density than the skin layer.

特許文献１では、可動型を内部に収容した移動型と固定型とからなる成形型を型閉じした状態で、キャビティ内に繊維入り熱可塑性樹脂を射出充填し、該キャビティ内で上記繊維入り熱可塑性樹脂が固化する過程で、上記移動型内で可動型をキャビティ容積が拡大する方向に後退させて繊維入り熱可塑性樹脂を膨張させることにより、スキン層が表面に形成されるとともに多数の空隙を有する膨張層が内部に形成された樹脂成形体を得るようにしている。そして、この樹脂成形体では、上記膨張層を樹脂成形体のパネル全域に形成することにより軽量化を図っている。   In Patent Document 1, in a state in which a mold composed of a movable mold and a fixed mold accommodated in a movable mold is closed, a fiber-filled thermoplastic resin is injected and filled into a cavity, and the fiber-filled heat is filled in the cavity. In the process of solidifying the plastic resin, the movable mold in the movable mold is retracted in the direction in which the cavity volume is expanded to expand the fiber-containing thermoplastic resin, whereby a skin layer is formed on the surface and a large number of voids are formed. A resin molded body having an expanded layer formed therein is obtained. And in this resin molding, weight reduction is achieved by forming the said expansion layer in the whole panel panel of a resin molding.

ところで、上述の如く膨張成形された樹脂成形体を相手部材に取り付けるために、位置決めピンや締結用ボス等の突出部を成形体本体に突設することがある。この場合、上記突出部が中実であると、重量が増大するとともに材料費が嵩み、さらには成形体本体に厚肉の突出部に対応してヒケが発生すること等から、突出部を先端が閉塞された中空部を有する筒状に成形することが考えられる。このような突出部を有する樹脂成形体は、図５に示すようにして膨張成形される。   By the way, in order to attach the resin molded body, which has been subjected to expansion molding as described above, to the mating member, protruding portions such as positioning pins and fastening bosses may be provided on the molded body. In this case, if the protruding portion is solid, the weight increases and the material cost increases, and further, a sink occurs in the molded body corresponding to the thick protruding portion. It is conceivable to form into a cylindrical shape having a hollow portion whose tip is closed. The resin molded body having such protrusions is expanded and formed as shown in FIG.

つまり、まず、図５（ａ）に示すように、成形面ａに凸部ｂが突設された固定型ｃと、成形面ｄに上記凸部ｂに対応して凹部ｅが凹設された可動型ｆとを型閉じした状態で、キャビティｇ内に繊維入り熱可塑性樹脂ｈを射出充填する。次いで、該キャビティｇ内で上記繊維入り熱可塑性樹脂ｈが固化する過程で、図５（ｂ）に示すように、上記可動型ｆをキャビティ容積が拡大する方向に後退させて繊維入り熱可塑性樹脂ｈを膨張させることにより、スキン層ｉが表面に形成されるとともに多数の空隙を有する膨張層ｊが内部に形成された成形体本体ｋを成形し、かつ中空部ｌを有する筒状突出部ｍが上記成形体本体ｋに一体に突設された樹脂成形体ｎを膨張成形するようにしている。そして、上記突出部ｍの縦壁部ｏに対応するキャビティ容積は上記可動型ｆの後退によっては拡大せず、上記縦壁部ｏはソリッド層ｐに形成されている。また、上記突出部ｍの先端壁部ｑに対応するキャビティ容積は上記可動型ｆの後退によって拡大し、上記先端壁部ｑは成形体本体ｋの膨張層ｊと同様にスキン層ｉと膨張層ｊとが形成されている。
特開平１１−１５６８８１号公報（第３頁、図１） That is, first, as shown in FIG. 5 (a), a fixed mold c having a projection b protruding on the molding surface a and a recess e corresponding to the projection b on the molding surface d. With the movable mold f closed, the fiber-filled thermoplastic resin h is injected and filled into the cavity g. Next, in the process in which the fiber-containing thermoplastic resin h is solidified in the cavity g, as shown in FIG. 5B, the movable mold f is retracted in the direction in which the cavity volume is enlarged, and the fiber-containing thermoplastic resin is recovered. By expanding h, a cylindrical protrusion m having a hollow portion l formed with a skin body i formed on the surface and an expanded layer j having a number of voids formed therein is formed. However, the resin molded body n protruding integrally with the molded body main body k is subjected to expansion molding. The cavity volume corresponding to the vertical wall portion o of the protrusion m is not increased by the retraction of the movable mold f, and the vertical wall portion o is formed in the solid layer p. Further, the cavity volume corresponding to the tip wall portion q of the protrusion m is enlarged by the retraction of the movable mold f, and the tip wall portion q is similar to the expansion layer j of the molded body k, and the skin layer i and the expansion layer. j.
Japanese Patent Laid-Open No. 11-156881 (page 3, FIG. 1)

しかし、上述の如く突出部ｍの先端壁部ｑに膨張層ｊが形成されると、可動型ｆの後退に伴って縦壁部ｏの固化進行状態にある繊維入り熱可塑性樹脂ｈが可動型ｆの後退方向に引っ張られるため、成形された突出部ｍの縦壁部ｏに亀裂ｒが発生して突出部ｍの強度剛性が低下することになる。さりとて、上記先端壁部ｑをなくして突出部ｍの中空部ｌを成形体本体ｋに貫通させると、突出部ｍの強度剛性ばかりかその周りの成形体本体ｋの強度剛性も低下してしまう。   However, when the expansion layer j is formed on the tip wall portion q of the protrusion m as described above, the fiber-containing thermoplastic resin h in the solidified progress state of the vertical wall portion o as the movable mold f moves backward is movable. Since it is pulled in the backward direction of f, a crack r is generated in the vertical wall portion o of the molded projection m, and the strength rigidity of the projection m is lowered. If the tip wall q is eliminated and the hollow portion l of the protruding portion m is penetrated through the molded body k, not only the strength rigidity of the protruding portion m but also the strength rigidity of the surrounding molded body k is reduced. .

この発明はかかる点に鑑みてなされたものであり、その目的とするところは、膨張成形された樹脂成形体において、突出部の縦壁部に亀裂が発生しないようにして突出部の強度剛性を向上させ、かつ突出部周りの成形体本体の強度剛性をも向上させることである。   The present invention has been made in view of such a point, and an object of the present invention is to increase the strength and rigidity of the protruding portion in an expansion-molded resin molded body so that cracks do not occur in the vertical wall portion of the protruding portion. It is to improve the strength and rigidity of the molded body around the protrusion.

上記の目的を達成するため、この発明は、突出部の構造を工夫したことを特徴とする。   In order to achieve the above object, the present invention is characterized in that the structure of the protrusion is devised.

具体的には、この発明は、中空部を有する筒状突出部が成形体本体に一体に突設されたパネル状の樹脂成形体を対象とし、次のような解決手段を講じた。   Specifically, the present invention is directed to a panel-shaped resin molded body in which a cylindrical projecting portion having a hollow portion is integrally provided on a molded body, and the following solution is taken.

すなわち、この発明は、上記成形体本体は、成形型のキャビティ内に射出充填した繊維入り熱可塑性樹脂が固化する過程で、キャビティ容積を拡大して上記繊維入り熱可塑性樹脂を膨張させることにより、樹脂密度の高いスキン層が表面に形成されるとともに多数の空隙を有し上記スキン層に比べて樹脂密度の低い膨張層が内部に形成されてなり、上記突出部は、成形時にキャビティ容積を拡大せずに形成されたソリッド層からなり、上記突出部の先端には開放口が形成されて中空部先端側が開放するとともに、突出部基端側の中空部が上記成形体本体のスキン層で塞がれていることを特徴とする。   That is, this invention, the molded body body, in the process of solidifying the fiber-filled thermoplastic resin injected and filled into the cavity of the mold, by expanding the cavity volume and expanding the fiber-containing thermoplastic resin, A skin layer having a high resin density is formed on the surface, and an expansion layer having a large number of voids and a resin density lower than that of the skin layer is formed inside. The protruding portion expands the cavity volume during molding. The open end is formed at the tip of the projecting portion to open the distal end side of the hollow portion, and the hollow portion on the base end side of the projecting portion is closed by the skin layer of the molded body. It is characterized by peeling.

この発明によれば、成形体本体の表面にスキン層が形成されるとともに、内部に多数の空隙を有する膨張層が形成され、樹脂成形体の軽量化を図ることができる。また、突出部がソリッド層で形成され、かつ該突出部の中空部先端側が開放して先端壁部がないため、可動型が後退しても突出部の固化進行状態にある繊維入り熱可塑性樹脂は可動型の後退方向に引っ張られず、突出部への亀裂発生をなくして突出部の強度剛性を確保することができる。また、上記突出部基端側の中空部が上記成形体本体のスキン層で塞がれているため、突出部が成形体本体の面で支持され、このことによっても、突出部の強度剛性を向上させることができ、さらには突出部周りの成形体本体の強度剛性をも向上させることができる。   According to this invention, the skin layer is formed on the surface of the molded body, and the expanded layer having a large number of voids is formed therein, so that the weight of the resin molded body can be reduced. Further, since the protruding portion is formed of a solid layer and the distal end side of the hollow portion of the protruding portion is open and there is no distal end wall portion, the fiber-containing thermoplastic resin in which the protruding portion is solidified even when the movable mold is retracted Is not pulled in the retracting direction of the movable mold, and it is possible to ensure the strength and rigidity of the protruding portion without generating cracks in the protruding portion. In addition, since the hollow portion on the base end side of the protruding portion is closed with the skin layer of the molded body, the protruding portion is supported by the surface of the molded body, which also increases the strength and rigidity of the protruding portion. It is possible to improve the strength and rigidity of the molded body around the protrusion.

以下、この発明の実施の形態について図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図３は自動車のサイドドア１の断面図である。該サイドドア１はドアアウタパネル３とドアインナパネル５とからなるドア本体７を備え、該ドア本体７の上記ドアインナパネル５にこの発明の実施の形態に係るパネル状の樹脂成形体としての樹脂製キャリアプレート（ドアモジュール）９がシール材１１を介して取り付けられ、ドアトリム１３が上記キャリアプレート９を車室内側から被うように上記ドアインナパネル５に取り付けられている。   FIG. 3 is a sectional view of the side door 1 of the automobile. The side door 1 includes a door body 7 including a door outer panel 3 and a door inner panel 5, and the door inner panel 5 of the door body 7 is a resin as a panel-shaped resin molded body according to an embodiment of the present invention. A carrier plate (door module) 9 is attached via a seal material 11, and a door trim 13 is attached to the door inner panel 5 so as to cover the carrier plate 9 from the vehicle interior side.

上記キャリアプレート９は、繊維入り熱可塑性樹脂で成形され、その主体をなす成形体本体としてのプレート本体１５を備えている。該プレート本体１５の車室外側面の外周縁部には、図２にも示すように、上記シール材１１を収容するシール溝部１７が形成されている。また、上記プレート本体１５の上記シール溝部１７内側には、キャリアプレート９をドアインナパネル５に取り付けるためにボルト挿通孔１９ａが貫通して形成された複数個の取付部１９が所定間隔をあけて全周に亘って一体に形成されている。   The carrier plate 9 is formed of a thermoplastic resin containing fibers, and includes a plate body 15 as a molded body that is the main body. As shown in FIG. 2, a seal groove portion 17 that accommodates the sealing material 11 is formed in the outer peripheral edge portion of the outer side surface of the plate body 15. In addition, a plurality of mounting portions 19 formed with bolt insertion holes 19a penetrating inside the seal groove portion 17 of the plate body 15 so as to attach the carrier plate 9 to the door inner panel 5 are spaced apart from each other by a predetermined interval. It is integrally formed over the entire circumference.

上記プレート本体１５は、後述する成形型３１のキャビティ３７内に射出充填した繊維入り熱可塑性樹脂Ｒが固化する過程で、該プレート本体１５に対応するキャビティ容積を拡大して上記繊維入り熱可塑性樹脂Ｒを膨張させることにより、図１に示すように、空隙がなく樹脂密度の高い堅いスキン層２１が表面に形成されるとともに、多数の空隙（図示せず）を有し上記スキン層２１に比べて樹脂密度の低い膨張層２３が内部に形成されている。図３では作図の都合によりプレート本体１５を単一層として表している。なお、繊維入り熱可塑性樹脂Ｒの膨張は、上記熱可塑性樹脂Ｒに混入されている繊維（図示せず）の弾性復元力によっても行われる。   The plate body 15 expands the cavity volume corresponding to the plate body 15 in the process of solidifying the fiber-filled thermoplastic resin R injected and filled in the cavity 37 of the molding die 31 described later, and the fiber-containing thermoplastic resin. By expanding R, as shown in FIG. 1, a hard skin layer 21 having no voids and a high resin density is formed on the surface, and has a large number of voids (not shown), compared to the skin layer 21. Thus, an expanded layer 23 having a low resin density is formed inside. In FIG. 3, the plate body 15 is shown as a single layer for the convenience of drawing. The expansion of the fiber-containing thermoplastic resin R is also performed by the elastic restoring force of the fibers (not shown) mixed in the thermoplastic resin R.

上記キャリアプレート９の車室外側面の車体前後方向上方寄りには、キャリアプレート９をドアインナパネル５に取り付ける際に位置決めする筒状突出部としての位置決めピン２５が１本ずつ一体に突設されている。この位置決めピン２５は中空部２７を有し、かつ該位置決めピン２５の先端には開放口２５ａが形成されて中空部２７先端側が開放するとともに、位置決めピン２５基端側の中空部２７が上記プレート本体１５のスキン層２１で塞がれている。また、位置決めピン２５の先端は先細状になるように斜めに切り欠かれてガイド面２５ｂが形成され、キャリアプレート９をドアインナパネル５に取り付ける際に該ドアインナパネル５の位置決め孔５ａに位置決めピン２５を挿入し易いようにしている。上記位置決めピン２５は、膨張成形時に該位置決めピン２５に対応するキャビティ容積を拡大せず、膨張層２３を有しない堅いソリッド層２９からなっている。   Positioning pins 25 as cylindrical projections for positioning when the carrier plate 9 is attached to the door inner panel 5 are integrally projected one by one on the vehicle body front and rear direction upper side of the outer side surface of the carrier plate 9 in the vehicle body. Yes. The positioning pin 25 has a hollow portion 27, and an opening 25a is formed at the distal end of the positioning pin 25 so that the distal end side of the hollow portion 27 is opened, and the hollow portion 27 on the proximal end side of the positioning pin 25 is connected to the plate. The main body 15 is closed with a skin layer 21. Further, the leading end of the positioning pin 25 is cut obliquely so as to be tapered to form a guide surface 25b, and when the carrier plate 9 is attached to the door inner panel 5, it is positioned in the positioning hole 5a of the door inner panel 5. The pins 25 are easily inserted. The positioning pin 25 is composed of a hard solid layer 29 that does not expand the cavity volume corresponding to the positioning pin 25 during expansion molding and does not have the expansion layer 23.

このようなキャリアプレート９は、図４に示すような成形型３１を用いて成形される。   Such a carrier plate 9 is molded using a molding die 31 as shown in FIG.

この成形型３１は、成形面３３ａがプレート本体１５の車室内側面の形状に対応した固定型３３と、該固定型３３に対して進退可能に対向配置され成形面３５ａに位置決めピン２５の形状に対応して凹部３５ｂが凹設された可動型３５とを備えている。   The molding die 31 is arranged so that the molding surface 33a corresponds to the shape of the side surface of the vehicle interior of the plate body 15 and the stationary die 33 so as to be able to advance and retreat, and the molding surface 35a has the shape of the positioning pin 25. Correspondingly, a movable mold 35 having a recess 35b is provided.

そして、まず、図４（ａ）に示すように、成形型３１を型閉じした状態で、キャビティ３７内に射出機（図示せず）からガラス繊維等の繊維入り熱可塑性樹脂Ｒ（例えば繊維入りポリプロピレン樹脂）を射出充填する。   First, as shown in FIG. 4A, with the mold 31 closed, a thermoplastic resin R containing fibers such as glass fibers (for example, containing fibers) is injected into the cavity 37 from an injection machine (not shown). Polypropylene resin) is injected and filled.

その後、成形型３１のキャビティ３７内で繊維入り熱可塑性樹脂Ｒが固化する過程で、すなわち、キャビティ３７における成形型３１（固定型３３、可動型３５）の成形面３３ａ，３５ａ近傍にスキン層２１が生成された時点で、図４（ｂ）に示すように、可動型３５をキャビティ容積が拡大する型開き方向Ａに後退させる。つまり、可動型３５を固定型３３から僅かに離れさせ、キャビティ容積を例えば２倍もしくはそれ以上に拡大させる。この段階で、繊維入り熱可塑性樹脂Ｒは、成形型３１（固定型３３及び可動型３５）の成形面３３ａ，３５ａと接触する部分が型温の影響により早期に冷却されているため、空隙がなく堅いスキン層２１となって表面層を構成する。一方、繊維入り熱可塑性樹脂Ｒの内側部分は型温の影響を受け難く、粘度の高いゲル状態になっている。したがって、キャビティ容積の拡大により、それまで固定型３３及び可動型３５で圧縮されている繊維入り熱可塑性樹脂Ｒが可動型３５の成形面３５ａに引っ張られて膨張する。この際、繊維入り熱可塑性樹脂Ｒも上記圧縮から解放されて弾性的に復元し、この弾性復元力（スプリングバック現象）によっても上記熱可塑性樹脂Ｒが膨張する。このことにより、空隙がなく堅いスキン層２１が表面全体に形成されるとともに、内部に多数の空隙（図示せず）を有する膨張層２３が形成されたプレート本体１５が膨張成形され、２本の位置決めピン２５が上記プレート本体１５の車室外側面に一体に突設されたキャリアプレート９が膨張成形される。   Thereafter, in the process of solidifying the fiber-containing thermoplastic resin R in the cavity 37 of the mold 31, that is, in the vicinity of the molding surfaces 33 a and 35 a of the mold 31 (fixed mold 33, movable mold 35) in the cavity 37. 4 is generated, the movable mold 35 is retracted in the mold opening direction A in which the cavity volume is increased, as shown in FIG. In other words, the movable mold 35 is slightly separated from the fixed mold 33, and the cavity volume is increased by, for example, twice or more. At this stage, the fiber-containing thermoplastic resin R is cooled at an early stage due to the influence of the mold temperature because the portions of the mold 31 (the fixed mold 33 and the movable mold 35) that are in contact with the molding surfaces 33a and 35a are cooled. The hard skin layer 21 is formed and the surface layer is formed. On the other hand, the inner part of the fiber-containing thermoplastic resin R is hardly affected by the mold temperature and is in a gel state with high viscosity. Therefore, as the cavity volume increases, the fiber-containing thermoplastic resin R that has been compressed by the fixed mold 33 and the movable mold 35 is pulled by the molding surface 35 a of the movable mold 35 and expands. At this time, the thermoplastic resin R containing fibers is also released from the compression and elastically restored, and the thermoplastic resin R expands also by this elastic restoring force (spring back phenomenon). As a result, a rigid skin layer 21 having no voids is formed on the entire surface, and the plate body 15 in which an expansion layer 23 having a large number of voids (not shown) is formed is expanded and molded. The carrier plate 9 in which the positioning pins 25 are integrally projected on the outer side surface of the passenger compartment of the plate body 15 is formed by expansion molding.

このようにして膨張成形されたキャリアプレート９では、プレート本体１５が膨張層２３を有しないソリッド層のみからなりかつ本実施形態のプレート本体１５と同一肉厚である場合に比べて、軽量化を図ることができる。   In the carrier plate 9 expanded and formed in this way, the plate body 15 is made of only a solid layer having no expansion layer 23 and has the same thickness as the plate body 15 of the present embodiment. Can be planned.

また、上記位置決めピン２５に対応するキャビティ３７内の繊維入り熱可塑性樹脂Ｒは、可動型３５がキャビティ容積を拡大する方向に後退しても、位置決めピン２５の先端に開放口２５ａが形成されるようにしていること、及びキャビティ３７内が膨張するため当該キャビティ空間は拡大せず、したがって、キャビティ３７側に引っ張られず、成形された位置決めピン２５は堅いソリッド層２９に形成されている。また、該位置決めピン２５の中空部２７先端側が開放して先端壁部がないため、可動型３５が後退しても位置決めピン２５の固化進行状態にある繊維入り熱可塑性樹脂Ｒは可動型３５の後退方向に引っ張られず、つまり、上記凹部３５ｂの容積が上記後退方向に拡大することがないため、位置決めピン２５に亀裂が発生しない。したがって、位置決めピン２５の強度剛性を確保することができる。   Further, the fiber-containing thermoplastic resin R in the cavity 37 corresponding to the positioning pin 25 forms an opening 25a at the tip of the positioning pin 25 even if the movable die 35 is retracted in the direction of expanding the cavity volume. Therefore, the cavity space does not expand because the inside of the cavity 37 is expanded, and therefore, the molded positioning pin 25 is formed in the solid solid layer 29 without being pulled toward the cavity 37 side. Further, since the distal end side of the hollow portion 27 of the positioning pin 25 is open and there is no distal end wall portion, the fiber-containing thermoplastic resin R in the solidified progress state of the positioning pin 25 even when the movable die 35 is retracted is the movable die 35. The positioning pin 25 is not cracked because it is not pulled in the backward direction, that is, the volume of the recess 35b does not increase in the backward direction. Therefore, the strength and rigidity of the positioning pin 25 can be ensured.

さらに、上記位置決めピン２５基端側の中空部２７が上記プレート本体１５のスキン層２１で塞がれているため、位置決めピン２５がプレート本体１５の面で支持され、このことによっても、位置決めピン２５の強度剛性を向上させることができ、さらには位置決めピン２５周りのプレート本体１５の強度剛性をも向上させることができる。   Further, since the hollow portion 27 on the base end side of the positioning pin 25 is closed by the skin layer 21 of the plate main body 15, the positioning pin 25 is supported by the surface of the plate main body 15. The strength rigidity of the plate body 15 around the positioning pins 25 can be improved.

なお、上記の実施の形態では、突出部が位置決めピン２５である場合を例示したが、キャリアプレート９に必要部品を取り付けるための取付部にも適用することができるものである。   In the above-described embodiment, the case where the protruding portion is the positioning pin 25 is illustrated, but the present invention can also be applied to an attachment portion for attaching a necessary component to the carrier plate 9.

また、上記の実施の形態において、繊維入り熱可塑性樹脂Ｒに発泡材を含有させれば、可動型３５の後退量すなわち膨張倍率を大きくしてプレート本体１５の可動型後退方向の肉厚（板厚）を厚くした場合、繊維入り熱可塑性樹脂Ｒの膨張量が不足しても、発泡材の発泡力（膨張圧）がそれを補完して空隙を確実に形成することができて好ましい。これらの場合、発泡材としては、化学反応によりガスを発生させる化学的発泡材や、二酸化炭素ガス及び窒素ガス等の不活性ガスを用いる物理的発泡材等がある。   Further, in the above embodiment, if a foamed material is contained in the fiber-containing thermoplastic resin R, the retraction amount of the movable mold 35, that is, the expansion ratio is increased to increase the thickness of the plate body 15 in the movable retraction direction (plate). When the thickness is increased, even if the expansion amount of the fiber-containing thermoplastic resin R is insufficient, the foaming force (expansion pressure) of the foam material complements it, and it is preferable that the voids can be formed reliably. In these cases, examples of the foam material include a chemical foam material that generates a gas by a chemical reaction, and a physical foam material that uses an inert gas such as carbon dioxide gas and nitrogen gas.

さらに、上記の実施の形態では、樹脂成形体が自動車のサイドドアのキャリアプレート９である場合を示したが、インストルメントパネル、ドアトリム、トランクボード等の他の自動車用パネルや自動車以外の家電製品、住宅用パネル等にも適用することができるものである。   Further, in the above embodiment, the case where the resin molded body is the carrier plate 9 for the side door of the automobile is shown. However, other automobile panels such as instrument panels, door trims, trunk boards, etc. It can also be applied to residential panels.

この発明は、成形体本体の表面が樹脂密度の高いスキン層であり、内部が上記スキン層に比べて樹脂密度の低い膨張層であり、中空部を有する筒状突出部が上記成形体本体に一体に突設されたパネル状の樹脂成形体について有用である。   In the present invention, the surface of the molded body is a skin layer having a high resin density, the inside is an expanded layer having a resin density lower than that of the skin layer, and a cylindrical protrusion having a hollow portion is formed on the molded body. It is useful for a panel-shaped resin molded body that is integrally projected.

図２のＩ−Ｉ線における断面図である。It is sectional drawing in the II line | wire of FIG. キャリアプレートを車室外側から見た正面図である。It is the front view which looked at the carrier plate from the vehicle compartment outer side. 図２のIII −III 線に相当する自動車のドアの断面図である。It is sectional drawing of the door of the motor vehicle equivalent to the III-III line of FIG. （ａ）はキャビティ内に繊維入り熱可塑性樹脂を射出充填した状態を示す図１対応箇所の成形型断面図、（ｂ）は図４（ａ）の可動型をキャビティ容積が拡大する方向に僅かに後退させた成形型断面図である。(A) is a cross-sectional view of the molding die corresponding to FIG. 1 showing a state in which the fiber-filled thermoplastic resin is injected and filled in the cavity, and (b) is a slight increase in the cavity volume of the movable die in FIG. 4 (a). FIG. 従来例の成形型断面図を示し、（ａ）は図４（ａ）相当図、（ｂ）は図４（ｂ）相当図である。The shaping | molding die sectional drawing of a prior art example is shown, (a) is a figure corresponding to Fig.4 (a), (b) is a figure corresponding to FIG.4 (b).

符号の説明Explanation of symbols

９ キャリアプレート（樹脂成形体）
１５ プレート本体（成形体本体）
２１ スキン層
２３ 膨張層
２５ 位置決めピン（突出部）
２５ａ 開放口
２７ 中空部
２９ ソリッド層
３１ 成形型
３７ キャビティ
Ｒ 繊維入り熱可塑性樹脂 9 Carrier plate (resin molding)
15 Plate body (molded body)
21 Skin layer 23 Expansion layer 25 Positioning pin (protrusion)
25a Open port 27 Hollow portion 29 Solid layer 31 Mold 37 Cavity R Fiber-containing thermoplastic resin

Claims (1)

中空部を有する筒状突出部が成形体本体に一体に突設されたパネル状の樹脂成形体であって、
上記成形体本体は、成形型のキャビティ内に射出充填した繊維入り熱可塑性樹脂が固化する過程で、キャビティ容積を拡大して上記繊維入り熱可塑性樹脂を膨張させることにより、樹脂密度の高いスキン層が表面に形成されるとともに多数の空隙を有し上記スキン層に比べて樹脂密度の低い膨張層が内部に形成されてなり、
上記突出部は、成形時にキャビティ容積を拡大せずに形成されたソリッド層からなり、
上記突出部の先端には開放口が形成されて中空部先端側が開放するとともに、突出部基端側の中空部が上記成形体本体のスキン層で塞がれていることを特徴とする樹脂成形体。 A panel-shaped resin molded body in which a cylindrical projecting portion having a hollow portion is integrally projected on the molded body body,
The molded body is a skin layer having a high resin density by expanding the cavity volume and expanding the fiber-containing thermoplastic resin in the process of solidifying the fiber-containing thermoplastic resin injected and filled into the cavity of the mold. Is formed on the surface and has a large number of voids, and an expanded layer having a lower resin density than the skin layer is formed inside,
The protrusion is composed of a solid layer formed without expanding the cavity volume during molding,
A resin molding characterized in that an opening is formed at the distal end of the protruding portion, the distal end side of the hollow portion is opened, and the hollow portion on the proximal end side of the protruding portion is closed by the skin layer of the molded body. body.
JP2005367660A 2005-12-21 2005-12-21 Resin molding Pending JP2007168214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005367660A JP2007168214A (en) 2005-12-21 2005-12-21 Resin molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005367660A JP2007168214A (en) 2005-12-21 2005-12-21 Resin molding

Publications (1)

Publication Number Publication Date
JP2007168214A true JP2007168214A (en) 2007-07-05

Family

ID=38295419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005367660A Pending JP2007168214A (en) 2005-12-21 2005-12-21 Resin molding

Country Status (1)

Country Link
JP (1) JP2007168214A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11179751A (en) * 1997-12-22 1999-07-06 Idemitsu Petrochem Co Ltd Fiber reinforced lightweight resin molded product having projected part and its production
JP2000009925A (en) * 1998-06-16 2000-01-14 United Microelectronics Corp Production of complementary type metal-oxide- semiconductor (cmos) photosensitive device
JP2002225058A (en) * 2001-01-30 2002-08-14 Sumitomo Chem Co Ltd Foamed thermoplastic resin molding
JP2003326560A (en) * 2002-05-15 2003-11-19 Sekisui Chem Co Ltd Ribbed foam and molding die therefor
JP2007030441A (en) * 2005-07-29 2007-02-08 Toyoda Gosei Co Ltd Manufacturing method of resin molding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11179751A (en) * 1997-12-22 1999-07-06 Idemitsu Petrochem Co Ltd Fiber reinforced lightweight resin molded product having projected part and its production
JP2000009925A (en) * 1998-06-16 2000-01-14 United Microelectronics Corp Production of complementary type metal-oxide- semiconductor (cmos) photosensitive device
JP2002225058A (en) * 2001-01-30 2002-08-14 Sumitomo Chem Co Ltd Foamed thermoplastic resin molding
JP2003326560A (en) * 2002-05-15 2003-11-19 Sekisui Chem Co Ltd Ribbed foam and molding die therefor
JP2007030441A (en) * 2005-07-29 2007-02-08 Toyoda Gosei Co Ltd Manufacturing method of resin molding

Similar Documents

Publication Publication Date Title
JP4836570B2 (en) Resin panel and automobile door
JP4795050B2 (en) Resin molded body
JP4790332B2 (en) Resin molded body
JP4671869B2 (en) Mold
JP4705829B2 (en) Resin panel and manufacturing method thereof
JP3865751B2 (en) Resin molded body and molding method thereof
JP4773191B2 (en) Resin molded body and molding method thereof
JP2007168214A (en) Resin molding
JP4482439B2 (en) Plastic molded product
JP2007216532A (en) Foamed resin, interior part for automobile, and manufacturing method for foamed resin
JP2007001017A (en) Resin molded product
JP4482440B2 (en) Plastic molded product
JP4842026B2 (en) Plastic molded product
JP4734128B2 (en) Vehicle door module panel
JP2007223282A (en) Resin molding, and its molding method
JP4850555B2 (en) Molding method of resin molding
JP2003251669A (en) Molding base material for door trim and method for manufacturing the same
JP5128333B2 (en) Manufacturing method of airbag device and airbag device
JP2005212244A (en) Method for molding resin molded product
JP2001239544A (en) Resin part having skin and method of manufacturing the same
JP2006015633A (en) Injection foaming mold, injection foam molding method and skinned foamed resin member
JP2008173876A (en) Resin molding panel
JP2011104958A (en) Foamed resin panel
JP5079621B2 (en) Assembly structure of resin foam molding
JP2000280848A (en) Instrument panel with lid part for air bag

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Effective date: 20070425

Free format text: JAPANESE INTERMEDIATE CODE: A712

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20081016

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110407

A131 Notification of reasons for refusal

Effective date: 20110419

Free format text: JAPANESE INTERMEDIATE CODE: A131

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20110913