JP2950102B2 - Sandwich molded product with mounting holes - Google Patents
Sandwich molded product with mounting holesInfo
- Publication number
- JP2950102B2 JP2950102B2 JP16844593A JP16844593A JP2950102B2 JP 2950102 B2 JP2950102 B2 JP 2950102B2 JP 16844593 A JP16844593 A JP 16844593A JP 16844593 A JP16844593 A JP 16844593A JP 2950102 B2 JP2950102 B2 JP 2950102B2
- Authority
- JP
- Japan
- Prior art keywords
- mounting hole
- skin material
- core
- molded product
- core material
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は，例えば自動車用部品で
あるオーバフェンダのごとき，取付穴を有するサンドイ
ッチ成形品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandwich molded product having a mounting hole, for example, an over fender which is a component for an automobile.
【０００２】[0002]
【従来技術】合成樹脂成形品においては，内部にコア材
を，その表面にスキン材を被覆形成したサンドイッチ成
形品が知られている（特開平２−２０６５１８）。この
ものは，合成樹脂により一体的に成形され，内部に比較
的硬質のコア材を，表面に比較的軟質のスキン材を有し
ている。そのため，表面が軟質で，全体の剛性が高いと
いう優れた性質を有している。2. Description of the Related Art As a synthetic resin molded product, a sandwich molded product in which a core material is formed inside and a skin material is formed on the surface thereof is known (Japanese Patent Laid-Open No. 2-206518). This is integrally formed of a synthetic resin and has a relatively hard core material inside and a relatively soft skin material on the surface. Therefore, it has an excellent property that the surface is soft and the overall rigidity is high.
【０００３】このような，サンドイッチ成形品は，クリ
ップ，ボルトなどの取付具を係合するための取付穴を有
し，これらを介して相手部材に取付けられる。例えば，
図７に示すごとく，小型トラック９９の前輪上方の車体
に設けるオーバフェンダ９を例にとれば，このものは略
円弧状の長尺状成形品である。そして，このオーバフェ
ンダ９は，車体９８にクリップを介して装着される。ま
た，図８に示すごとく，オーバフェンダ９は，本体９０
に上記クリップを係合するための取付穴９１を有する。[0003] Such a sandwich molded product has a mounting hole for engaging a mounting tool such as a clip or a bolt, and is mounted to a mating member via these. For example,
As shown in FIG. 7, if the over fender 9 provided on the vehicle body above the front wheel of the small truck 99 is taken as an example, this is a substantially arc-shaped elongated molded product. The over fender 9 is attached to the vehicle body 98 via a clip. Also, as shown in FIG.
Has a mounting hole 91 for engaging the clip.
【０００４】ところで，上記オーバフェンダ９をサンド
イッチ成形品により構成する場合には，図９及び後述の
図２に示すごとく，合成樹脂のコア材２とその表面に被
覆された合成樹脂のスキン材１とによって形成する。ま
た，上記サンドイッチ成形品を成形する際には，後述の
図１０に示すごとく，キャビティ８１内に上記取付穴を
形成するための中子８５を設けた成形型８を用いる。そ
して，成形型８内にスキン材１を射出し，その後該スキ
ン材１の中にコア材を注入する。取付穴成形時におい
て，余分のスキン材１は小流路８２１を経て捨てタブ８
２内に流出する。When the overfender 9 is made of a sandwich molded product, as shown in FIG. 9 and FIG. 2 to be described later, a synthetic resin core material 2 and a synthetic resin skin material 1 coated on the surface thereof are used. And formed by When the sandwich molded product is molded, a molding die 8 provided with a core 85 for forming the mounting hole in the cavity 81 is used as shown in FIG. Then, the skin material 1 is injected into the molding die 8, and then the core material is injected into the skin material 1. At the time of forming the mounting hole, the excess skin material 1 is discarded through the small flow path 821.
Flow out into 2.
【０００５】これにより，前記図９に示すごとく，内部
に硬質のコア材２を，穴表面に軟質のスキン材１が被覆
された取付穴９１が成形される。このことは，本体９０
においても同様である。As a result, as shown in FIG. 9, a mounting hole 91 in which a hard core material 2 is covered and a soft skin material 1 is covered on the hole surface is formed. This means that the main body 90
The same applies to.
【０００６】[0006]
【解決しようとする課題】しかしながら，従来のサンド
イッチ成形品には，その取付穴に関して次の問題があ
る。即ち，従来のサンドイッチ成形品における取付穴９
１は，図９に示すごとく，表面にスキン材１を有してい
るものの，その周囲全体がコア材２によって取り囲まれ
ていないものがある。However, the conventional sandwich molded products have the following problems with respect to the mounting holes. That is, the mounting hole 9 in the conventional sandwich molded product is used.
As shown in FIG. 9, there is a type 1 which has a skin material 1 on the surface but is not entirely surrounded by a core material 2.
【０００７】即ち，図９に示すごとく，取付穴９１の周
囲のスキン材１は，その一部分が本体９０の表面のスキ
ン材１と連結し，ブリッヂが形成されてしまっている。
そのため，取付穴９１の剛性が低く，クリップ等の取付
具を強く把持できないおそれがある。その結果，クリッ
プの係合に座ゆるみを生じ，オーバフェンダ９と車体と
の間にズレを生ずるおそれがある。特に，オーバフェン
ダ９は長尺状の成形品であるため，上記の座ゆるみはそ
の全体の取付位置のズレに対して影響が大きい。That is, as shown in FIG. 9, a part of the skin material 1 around the mounting hole 91 is connected to the skin material 1 on the surface of the main body 90 to form a bridge.
For this reason, the rigidity of the mounting hole 91 is low, and there is a possibility that a mounting tool such as a clip cannot be gripped strongly. As a result, the engagement of the clip may cause seat loosening, which may cause a displacement between the overfender 9 and the vehicle body. In particular, since the over fender 9 is a long molded product, the above-mentioned loose seat has a large effect on the displacement of the entire mounting position.
【０００８】次に，上記のごとく，取付穴周囲へのコア
材の周り込み不良の原因は次のように考えられる。即
ち，まず上記サンドイッチ成形品を成形するための成形
型８は，図１０に示すごとく，本体９０を成形するため
のキャビティ８１と，該キャビティ８１内に設けた取付
穴を成形するための中子８５とを有する。また，中子８
５の後方には，タブ８２を有する。Next, as described above, the cause of the failure of the core material to wrap around the mounting hole is considered as follows. That is, first, as shown in FIG. 10, a molding die 8 for molding the sandwich molded product has a cavity 81 for molding a main body 90 and a core for molding a mounting hole provided in the cavity 81. 85. In addition, core 8
5 has a tab 82 behind.
【０００９】そこで，サンドイッチ成形品の成形に当た
っては，図１０に示すごとく，まずスキン材１をゲート
（図８の符号９６参照）よりキャビティ内に射出する。
次いで，該スキン材１内にコア材２を注入する。これに
より，スキン材１はキャビティの壁面で冷却されてスキ
ン層を形成しながら前方へ送られる。そして，図１１に
示すごとく，スキン材１は取付穴成形用の中子８５の周
囲を取り囲むようにして，更に前方へ流れる。また，ス
キン材１中のコア材２も前方へ流れていく。そして，余
分のスキン材１はタブ８２内へ流れ込む。Therefore, in forming a sandwich molded product, first, as shown in FIG. 10, the skin material 1 is injected into the cavity from a gate (see reference numeral 96 in FIG. 8).
Next, the core material 2 is injected into the skin material 1. Thereby, the skin material 1 is cooled by the wall surface of the cavity and is sent forward while forming a skin layer. Then, as shown in FIG. 11, the skin material 1 flows further forward so as to surround the core 85 for forming the mounting hole. Further, the core material 2 in the skin material 1 also flows forward. Then, the excess skin material 1 flows into the tab 82.
【００１０】ここで，注目すべきことは，上記スキン材
１，コア材２の流れにおいて，スキン材１は取付穴用の
中子８５を取り囲んでスキン層を形成するが，コア材２
は中子８５の周囲の上記スキン層の更に周囲を取り囲む
ことができないことである。その理由は，上記タブ８２
は，中子８５の近くにあるものの，該タブ８２内には先
にスキン材１のみが入り込んでしまい，コア材２の流れ
先端部２１がタブ８２の方向へ流れないからである。It should be noted that in the flow of the skin material 1 and the core material 2, the skin material 1 forms a skin layer surrounding the core 85 for the mounting hole.
Is that the skin layer around the core 85 cannot be further surrounded. The reason is tab 82 above.
This is because although the skin material 1 is located near the core 85, only the skin material 1 enters the tab 82 first, and the leading end portion 21 of the core material 2 does not flow in the direction of the tab 82.
【００１１】それ故，中子８５とタブ８２との間には，
スキン材１のブリッヂ１３が形成されてしまう。このブ
リッヂ１３はスキン材であるため，柔軟性を有し，前記
のごとく，取付具の座ゆるみ等を生ずる。そこで，上記
ブリッヂ１３を形成させないための手段として，タブ８
２の大きさを，ブリッヂ１３の容量よりも多量のコア材
２が充分に流入できる大容量のものとすることが考えら
れる。Therefore, between the core 85 and the tab 82,
The bridge 13 of the skin material 1 is formed. Since the bridge 13 is a skin material, the bridge 13 has flexibility, and as described above, the mounting fixture is loosened. Therefore, as a means for preventing the bridge 13 from being formed, the tab 8
It is conceivable that the size of 2 is large enough to allow a sufficient amount of core material 2 to flow in more than the capacity of bridge 13.
【００１２】しかし，この場合には，タブ８２内に大量
のスキン材とコア材とが流入し，合成樹脂材料に無駄を
生ずる。このタブ８２内に入ったスキン材及びコア材
は，成形後に本体９０から切り取り，廃棄されるからで
ある。このことは，オーバフェンダに限らず，取付穴を
有するサンドイッチ成形品に共通の問題である。本発明
は，かかる従来の問題点に鑑み，剛性に優れた取付穴を
有し，かつ成形時における合成樹脂の無駄が少ない取付
穴を有するサンドイッチ成形品を提供しようとするもの
である。However, in this case, a large amount of the skin material and the core material flow into the tab 82, and the synthetic resin material is wasted. This is because the skin material and the core material that have entered the tab 82 are cut off from the main body 90 after molding and discarded. This is a problem common to not only over fenders but also sandwich molded products having mounting holes. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a sandwich molded product having a mounting hole having excellent rigidity and having a small amount of waste of synthetic resin during molding.
【００１３】[0013]
【課題の解決手段】本発明は，合成樹脂のコア材とその
表面に被覆された合成樹脂のスキン材とからなると共に
取付穴を有するサンドイッチ成形品において，上記取付
穴における成形時の樹脂流れ後方部が，先細り形状をし
ており，かつ取付穴の周囲は上記スキン材が取り囲み，
更に該スキン材の周囲はコア材によって取り囲まれてい
ることを特徴とする取付穴を有するサンドイッチ成形品
にある。SUMMARY OF THE INVENTION The present invention relates to a sandwich molded product having a mounting hole and comprising a core material of a synthetic resin and a skin material of a synthetic resin coated on the surface thereof. Part is tapered, and the skin material surrounds the mounting hole,
Furthermore, there is provided a sandwich molded product having a mounting hole, wherein the periphery of the skin material is surrounded by a core material.
【００１４】本発明において最も注目すべき点は，サン
ドイッチ成形品の上記取付穴は，成形時の樹脂流れ後方
部が先細り形状を有していることである。上記樹脂流れ
後方部とは，成形時において，成形型のキャビティ内に
スキン材を射出したとき，及び上記スキン材の中へコア
材を注入したとき，上記取付穴を形成する中子における
合成樹脂の流れの後方部分をいう。The most remarkable point in the present invention is that the mounting hole of the sandwich molded product has a tapered shape at the rear portion of the resin flow during molding. The rear portion of the resin flow refers to a synthetic resin in a core forming the mounting hole when a skin material is injected into a cavity of a mold during molding, and when a core material is injected into the skin material. Means the rear part of the flow.
【００１５】また，取付穴の側壁はスキン材により形成
され，その周囲にコア材が位置している。一方，上記取
付穴が設けられている本体は，コア材とその表面に被覆
されたスキン材とよりなるサンドイッチ構造を有する。The side wall of the mounting hole is formed of a skin material, and a core material is located around the skin material. On the other hand, the main body provided with the mounting hole has a sandwich structure composed of a core material and a skin material coated on the surface thereof.
【００１６】上記コア材としては，硬質のＡＢＳ樹脂，
硬質ＰＶＣ樹脂，タルク等のフィラー入りのポリプロピ
レン樹脂などがある。また，これら樹脂にグラスファイ
バー等を混入させた樹脂などもある。また，スキン材と
しては，軟質のポリプロピレンにＥＰＤＭをブレンドし
た樹脂，ＥＶＡ樹脂，ＳＥＢＳ（スチレン・エチレン・
ブチレン・スチレン）樹脂，ＳＢＳ（スチレン・ブタジ
エン・スチレン）樹脂，或いは軟質ＰＶＣ樹脂などがあ
る。As the core material, hard ABS resin,
There are hard PVC resin and polypropylene resin containing filler such as talc. Further, there is a resin in which glass fiber or the like is mixed in these resins. In addition, as a skin material, a resin obtained by blending EPDM with soft polypropylene, an EVA resin, and SEBS (styrene / ethylene /
Examples include butylene / styrene) resin, SBS (styrene / butadiene / styrene) resin, and soft PVC resin.
【００１７】次に，上記サンドイッチ成形品を製造する
に当たっては，その成形型における中子の形状を，取付
穴の形状と同じにしておく。つまり，中子を前記樹脂流
れ後方部が先細り形状となるよう構成しておく（図３，
図６参照）。その他は通常のサンドイッチ成形法と同様
である。Next, in manufacturing the above sandwich molded product, the shape of the core in the molding die is made the same as the shape of the mounting hole. That is, the core is configured so that the resin flow rear portion has a tapered shape (see FIG. 3,
See FIG. 6). Others are the same as the usual sandwich molding method.
【００１８】[0018]
【作用及び効果】本発明の上記サンドイッチ成形品にお
いては，本体はサンドイッチ構造を有し，取付穴はその
表面がスキン材によって形成され，該スキン材の周囲
は，取付穴を囲むようにコア材が位置している。そし
て，取付穴における成形時の樹脂流れ後方部は，先細り
形状をしている。この先細り形状は，前記のごとく，取
付穴形成用の中子の樹脂流れ後方部を先細り形状にして
おくことにより形成される。In the sandwich molded article of the present invention, the main body has a sandwich structure, the mounting hole is formed by a skin material on the surface thereof, and the periphery of the skin material is surrounded by the core material so as to surround the mounting hole. Is located. The rear portion of the resin flow at the time of molding in the mounting hole has a tapered shape. As described above, the tapered shape is formed by tapering the rear portion of the resin flow of the core for forming the mounting hole.
【００１９】本発明のサンドイッチ成形品においては，
取付穴が上記構造を有している。そのため，取付穴は剛
性に優れている。それ故，前記座ゆるみも生じない。ま
た，成形時においては，取付穴を成形する中子の樹脂流
れ後方部が先細り形状になっているので，コア材が中子
の樹脂流れ後方部に早く到達し，中子の樹脂流れ後方部
の近くにあるタブの方向に比較的早く流れる。そのた
め，中子の周囲に充分にコア材が回り込み，上記取付穴
を得ることができる。In the sandwich molded article of the present invention,
The mounting hole has the above structure. Therefore, the mounting hole has excellent rigidity. Therefore, the seat does not loosen. Also, at the time of molding, since the rear part of the resin flow of the core for forming the mounting hole is tapered, the core material reaches the rear part of the resin flow of the core quickly, and the rear part of the resin flow of the core. Flows relatively quickly in the direction of the tub near. Therefore, the core material sufficiently wraps around the core, and the mounting hole can be obtained.
【００２０】それ故，前記従来例に示したごとく，タブ
を大容量とする必要がない。また，タブによって生ずる
廃棄合成樹脂の容量も少なくて済み，合成樹脂の無駄が
少ない。従って，本発明によれば，剛性に優れた取付穴
を有すると共に成形時における合成樹脂の無駄が少な
い，取付穴を有するサンドイッチ成形品を提供すること
ができる。Therefore, there is no need to increase the capacity of the tab, as shown in the conventional example. Further, the capacity of the waste synthetic resin generated by the tab is small, and the waste of the synthetic resin is small. Therefore, according to the present invention, it is possible to provide a sandwich molded product having a mounting hole, which has a mounting hole with excellent rigidity and which uses less synthetic resin during molding.
【００２１】[0021]
実施例１ 本発明の実施例にかかるサンドイッチ成形品及びその形
成方法につき，図１〜図５を用いて説明する。本例のサ
ンドイッチ成形品は，前記図７，図８に示すごとく，小
型トラックの前輪上方の車体に取付けるオーバフェンダ
９である。また，図１，図２に示すごとく，オーバフェ
ンダ９の本体９０は，合成樹脂のコア材２と，その表面
に被覆された合成樹脂のスキン材１とからなるサンドイ
ッチ構造を有している。Example 1 A sandwich molded product and a method for forming the same according to an example of the present invention will be described with reference to FIGS. As shown in FIGS. 7 and 8, the sandwich molded product of this embodiment is an over fender 9 attached to a vehicle body above the front wheel of a small truck. As shown in FIGS. 1 and 2, the main body 90 of the overfender 9 has a sandwich structure composed of a synthetic resin core material 2 and a synthetic resin skin material 1 coated on its surface.
【００２２】一方，取付穴３は，成形時の樹脂流れ後方
部が先細り形状３２をしており，前方部３１は円頭状
で，かつ取付穴３の周囲はスキン材１が取り囲み，更に
該スキン材１の周囲はコア材２によって取り囲まれてい
る。本例において，上記コア材としては硬質合成樹脂の
ガラス繊維入りポリプロピレン樹脂を用いた。一方，ス
キン材としては軟質合成樹脂のＳＥＢＳ樹脂を用いた。On the other hand, the mounting hole 3 has a tapered shape 32 at the rear portion of the resin flow at the time of molding, the front portion 31 has a round head shape, and the skin material 1 surrounds the mounting hole 3. The periphery of the skin material 1 is surrounded by a core material 2. In this example, a polypropylene resin containing glass fiber of a hard synthetic resin was used as the core material. On the other hand, a soft synthetic resin SEBS resin was used as the skin material.
【００２３】次に，上記オーバフェンダ９の製造法につ
き示す。まず，その成形型４は，図３に示すごとく，本
体９０を成形するためのキャビティ４１を有し，該キャ
ビティ４１の中に取付穴３を成形するための中子４５を
有する。また，中子４５の樹脂流れ後方部には小流路４
２１を介してタブ４２を有する。上記中子４５は，形成
しようとする取付穴３と同じ形状を有し，その樹脂流れ
後方部には先細り形状４５２を有する。中子４５は，前
方部に円弧状の前頭部４５１を有する。Next, a method of manufacturing the over fender 9 will be described. First, as shown in FIG. 3, the molding die 4 has a cavity 41 for molding the main body 90, and has a core 45 for molding the mounting hole 3 in the cavity 41. In addition, a small flow path 4
It has a tab 42 through 21. The core 45 has the same shape as the mounting hole 3 to be formed, and has a tapered shape 452 at the rear of the resin flow. The core 45 has an arc-shaped forehead 451 at the front.
【００２４】次に，サンドイッチ成形品の成形に当たっ
ては，図４に示すごとく，従来と同様にゲート（図２の
符号９６の位置にある）より，キャビティ４１内にまず
スキン材１を射出する。スキン材１は，ゲートより後方
に向かって，図４の矢印のように流れる。本体９０のス
キン層形成に必要な量のスキン材１が射出された後，該
スキン材１の中にコア材２が注入される。これにより，
スキン材１は更に前方へ移動していく。そして，スキン
材１は，キャビティ４１及び，中子４５の壁面に接触し
た部分が冷却されてスキン層を形成する。Next, when molding the sandwich molded product, as shown in FIG. 4, the skin material 1 is first injected into the cavity 41 from the gate (located at reference numeral 96 in FIG. 2) as in the conventional case. The skin material 1 flows backward from the gate as shown by the arrow in FIG. After an amount of the skin material 1 necessary for forming the skin layer of the main body 90 is injected, the core material 2 is injected into the skin material 1. This gives
The skin material 1 moves further forward. Then, the portion of the skin material 1 that is in contact with the cavity 41 and the wall surface of the core 45 is cooled to form a skin layer.
【００２５】また，スキン材１内に注入されたコア材２
はスキン材１の内部を前方へ流れていく。そして，注目
すべきことは，中子４５の周囲においては，コア材２
は，図５に示すごとく，中子４５の上方及び下方の両側
をスムースに流れる。これは，中子４５の樹脂流れ後方
部が先細り形状４５２を有しているためである。また，
この樹脂流れ後方部の後方にタブ４２が設けてある。そ
のため，スキン材１がタブ４２内へ流れる際に，コア材
２も若干引き連れていく。それ故，中子４５の全周囲に
コア材２が回り込むことができる。Also, the core material 2 injected into the skin material 1
Flows forward inside the skin material 1. It should be noted that, around the core 45, the core material 2
Flows smoothly on the upper and lower sides of the core 45 as shown in FIG. This is because the resin flow rear portion of the core 45 has a tapered shape 452. Also,
A tab 42 is provided behind the rear portion of the resin flow. Therefore, when the skin material 1 flows into the tub 42, the core material 2 is also slightly drawn. Therefore, the core material 2 can wrap around the entire core 45.
【００２６】したがって，上記のごとく，剛性に優れた
取付穴３を形成することができる。また，コア材２が容
易に中子４５の周囲に回り込むことができるため，タブ
４２を大きする必要がない。本例のオーバフェンダ９に
おいては，図１に示すごとく，本体９０はサンドイッチ
構造を有し，一方，取付穴３は，その周囲がスキン材
１，更にその周囲がコア材２によって取り囲まれてい
る。Therefore, as described above, the mounting hole 3 having excellent rigidity can be formed. Further, since the core material 2 can easily go around the core 45, the tab 42 does not need to be large. In the over fender 9 of the present embodiment, as shown in FIG. 1, the main body 90 has a sandwich structure, while the mounting hole 3 is surrounded by a skin material 1 and further around the core material 2. .
【００２７】そのため，オーバフェンダ９全体はサンド
イッチ構造本来の優れた性質を有し，一方取付穴３は優
れた剛性を有している。それ故，取付穴にクリップを係
合した場合でも，該クリップを強く係合しておくことが
でき，座ゆるみを生ずることがない。また，上記のごと
く，タブ４２は小さくしておくことができるので，成形
時における合成樹脂の無駄を少なくすることができる。Therefore, the entire overfender 9 has excellent properties inherent in the sandwich structure, while the mounting holes 3 have excellent rigidity. Therefore, even when the clip is engaged with the mounting hole, the clip can be strongly engaged, and the seat does not loosen. Further, as described above, since the tab 42 can be made smaller, waste of the synthetic resin during molding can be reduced.
【００２８】実施例２ 本例は，図６に示すごとく，取付穴とその樹脂流れ後方
部における先細り形状の種類を例示している。即ち，上
記先細り形状としては，種々のものを挙げることができ
る。図６（Ａ）の取付穴３５は，楕円形で，その先細り
形状３５１は比較的鋭角で小さく，前頭部３５２は円弧
である。Embodiment 2 In this embodiment, as shown in FIG. 6, the type of the tapered shape in the mounting hole and the resin flow rear portion thereof is illustrated. That is, the tapered shape may be various. 6A is elliptical, the tapered shape 351 is relatively acute and small, and the forehead 352 is an arc.
【００２９】図６（Ｂ）の取付穴３６は長方形で，その
先細り形状３６１は三角形で，前頭部３６２は四角形で
ある。図６（Ｃ）の取付穴３７は楕円形で，先細り形状
は三角形で，前頭部３７２は円弧である。また，図６
（Ｄ）の取付穴３８は８角形状で，先細り形状３８１は
三角形で，前頭部３８２は台形である。これらはいずれ
も，本発明の効果を発揮する。The mounting hole 36 in FIG. 6B is rectangular, the tapered shape 361 is triangular, and the forehead 362 is square. 6 (C) is an elliptical shape, the tapered shape is a triangular shape, and the forehead 372 is an arc. FIG.
The mounting hole 38 in (D) is octagonal, the tapered shape 381 is triangular, and the forehead 382 is trapezoidal. These all exhibit the effects of the present invention.
【図１】実施例にかかる，オーバフェンダの取付穴付近
の断面図。FIG. 1 is a sectional view of the vicinity of a mounting hole of an over fender according to an embodiment.
【図２】実施例にかかるオーバフェンダの一部断面，要
部斜視図。FIG. 2 is a partial cross-sectional view and a main part perspective view of an over fender according to the embodiment.
【図３】実施例１における成形方法にかかる成形型の断
面図。FIG. 3 is a cross-sectional view of a molding die according to a molding method in Example 1.
【図４】実施例１における，スキン材射出時の成形型の
断面図。FIG. 4 is a cross-sectional view of the molding die when the skin material is injected in the first embodiment.
【図５】実施例１における，コア材注入時の成形型の断
面図。FIG. 5 is a cross-sectional view of a molding die during injection of a core material according to the first embodiment.
【図６】実施例２における，取付穴の形状を示す説明
図。FIG. 6 is an explanatory view showing a shape of a mounting hole in the second embodiment.
【図７】従来例における小型トラックの側面図。FIG. 7 is a side view of a conventional small truck.
【図８】従来例におけるオーバフェンダの取付穴付近の
斜視図。FIG. 8 is a perspective view showing the vicinity of a mounting hole of an over fender in a conventional example.
【図９】従来例におけるオーバフェンダの取付穴付近の
断面図。FIG. 9 is a cross-sectional view showing the vicinity of a mounting hole of an over fender in a conventional example.
【図１０】従来例における成形型の，取付穴形成用中子
の付近の断面図。FIG. 10 is a cross-sectional view of the vicinity of a mounting hole forming core of a molding die according to a conventional example.
【図１１】従来例におけるサンドイッチ成形品の成形時
の説明図。FIG. 11 is an explanatory view at the time of molding a sandwich molded product in a conventional example.
１．．．スキン材， ２．．．コア材， ３，３５，３６，３７，３８．．．取付穴， ３２，３５１，３６１，３７１，３８１．．．先細り形
状， ４．．．成形型， ４１．．．キャビティ， ９．．．オーバフェンダ， ９０．．．本体，1. . . 1. skin material, . . Core material, 3, 35, 36, 37, 38. . . Mounting holes, 32, 351, 361, 371, 381. . . 3. tapered shape; . . Mold, 41. . . Cavity, 9. . . Over fender, 90. . . Body,
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 31:30 (72)発明者 栗山 弘 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (56)参考文献 特開 昭62−125309（ＪＰ，Ａ) 特開 平３−266779（ＪＰ，Ａ) 特開 平４−161313（ＪＰ，Ａ) 特開 平４−263914（ＪＰ，Ａ) 特開 平５−57747（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/16 B29C 45/26 B32B 3/06 B32B 27/00 ──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. 6 Identification code FI B29L 31:30 (72) Inventor Hiroshi Kuriyama 1 Ochiai-Ochiai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Toyoda Gosei Co., Ltd. (56) Reference Document JP-A-62-125309 (JP, A) JP-A-3-266779 (JP, A) JP-A-4-161313 (JP, A) JP-A-4-263914 (JP, A) JP-A-5-265 57747 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) B29C 45/16 B29C 45/26 B32B 3/06 B32B 27/00
Claims (1)
た合成樹脂のスキン材とからなると共に取付穴を有する
サンドイッチ成形品において，上記取付穴における成形
時の樹脂流れ後方部が，先細り形状をしており，かつ取
付穴の周囲は上記スキン材が取り囲み，更に該スキン材
の周囲はコア材によって取り囲まれていることを特徴と
する取付穴を有するサンドイッチ成形品。1. A sandwich molded product comprising a synthetic resin core material and a synthetic resin skin material coated on the surface thereof and having a mounting hole, wherein the resin flow rear portion at the time of molding in the mounting hole has a tapered shape. Wherein the skin material surrounds the periphery of the mounting hole, and the skin material is further surrounded by a core material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16844593A JP2950102B2 (en) | 1993-06-14 | 1993-06-14 | Sandwich molded product with mounting holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16844593A JP2950102B2 (en) | 1993-06-14 | 1993-06-14 | Sandwich molded product with mounting holes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH071508A JPH071508A (en) | 1995-01-06 |
| JP2950102B2 true JP2950102B2 (en) | 1999-09-20 |
Family
ID=15868252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16844593A Expired - Lifetime JP2950102B2 (en) | 1993-06-14 | 1993-06-14 | Sandwich molded product with mounting holes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2950102B2 (en) |
-
1993
- 1993-06-14 JP JP16844593A patent/JP2950102B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071508A (en) | 1995-01-06 |
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