JPH06312436A - Long sandwich molded product and molding thereof - Google Patents

Long sandwich molded product and molding thereof

Info

Publication number
JPH06312436A
JPH06312436A JP12550993A JP12550993A JPH06312436A JP H06312436 A JPH06312436 A JP H06312436A JP 12550993 A JP12550993 A JP 12550993A JP 12550993 A JP12550993 A JP 12550993A JP H06312436 A JPH06312436 A JP H06312436A
Authority
JP
Japan
Prior art keywords
core material
seat
molding
mounting seat
skin 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.)
Granted
Application number
JP12550993A
Other languages
Japanese (ja)
Other versions
JP3158782B2 (en
Inventor
Taiichiro Kawashima
大一郎 川島
Takahiko Sato
貴彦 佐藤
Hiroshi Mukai
浩 向井
Hiroshi Kuriyama
弘 栗山
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.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP12550993A priority Critical patent/JP3158782B2/en
Publication of JPH06312436A publication Critical patent/JPH06312436A/en
Application granted granted Critical
Publication of JP3158782B2 publication Critical patent/JP3158782B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • B29C2045/1654—Making multilayered or multicoloured articles having a "sandwich" structure whereby the core material is penetrating through the skin

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Body Structure For Vehicles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To provide a long sandwich molded product made of a synthetic resin not generating the seat loosening of the seat surface part of an end part attaching seat. CONSTITUTION:In a long sandwich molded product having a plurality of attaching seats, the seat surface part 32 of the end part attaching seat 3 positioned at the end part of the molded product among the attaching seats is formed from a core material 2. Especially, the upper surface 321 and rear surface 322 of the bottom surface part 32 and the surface of an attaching hole 31 are pref. formed from the core material 2. At a time of the molding of each of the end part attaching seats, a disporsable tab is provided to the end part cavity molding the end part attaching seat of a mold through a small passage and a throttle passage increasing flow resistance is provided to the small passage.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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，長尺状の長尺サンドイッ
チ成形品及びその成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long and long sandwich molded article such as an over fender which is an automobile part, and a molding method thereof.

【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 is known in which a core material is formed inside and a skin material is formed on the surface thereof (Japanese Patent Laid-Open No. 206518/1990). This product is integrally molded of synthetic resin and has a relatively hard core material inside and a relatively soft skin material on the surface. Therefore, it has the excellent properties 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
ップなどの取付具を係合するための取付座を有し，これ
らを介して相手部材に取付けられる。例えば，図１５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
１６，図１７に示すごとく，オーバフェンダ９は，本体
９０の裏側面に上記クリップ９６を係合するための取付
座９１を有する。Such a sandwich molded article has a mounting seat for engaging a mounting tool such as a clip, and is mounted on a mating member via these. For example, as shown in FIG. 15, if the over fender 9 provided on the vehicle body above the front wheels of the small truck 99 is taken as an example, this is a substantially arcuate elongated molded product. And this over fender 9
Are attached to the vehicle body 98 via clips. Further, as shown in FIGS. 16 and 17, the over fender 9 has a mounting seat 91 for engaging the clip 96 on the back side surface of the main body 90.

【０００４】該取付座９１は，クリップ９６の基部９６
１を係止するための取付穴９１１を有する。クリップ９
６の先端部９６２は車体の取付穴に係止される。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１７に示すごとく，その本体９０
及び取付座９１は，共に合成樹脂のコア材２とその表面
に被覆された合成樹脂のスキン材１とによって形成され
る。The mounting seat 91 is a base portion 96 of a clip 96.
It has a mounting hole 911 for locking 1. Clip 9
The front end portion 962 of 6 is locked in a mounting hole of the vehicle body. By the way, when the over fender 9 is formed of a sandwich molded product, as shown in FIG.
The mounting seat 91 is formed of a synthetic resin core material 2 and a synthetic resin skin material 1 coated on the surface thereof.

【０００５】また，上記サンドイッチ成形品を成形する
際には，上記取付座９１を形成するためのキャビティの
前方に，捨てタブを設けた成形型を用いる（図４参
照）。そして，成形型内にスキン材を射出し，その後該
スキン材の中にコア材を注入する。取付座成形時におい
て，余分のスキン材は小流路を経て捨てタブ内に流出す
る。Further, when the sandwich molded article is molded, a molding die provided with a discard tab in front of a cavity for forming the mounting seat 91 is used (see FIG. 4). Then, the skin material is injected into the molding die, and then the core material is injected into the skin material. When molding the mounting seat, the excess skin material flows out into the discarding tab through the small flow path.

【０００６】これにより，前記図１７に示すごとく，内
部に硬質のコア材２を，表面に軟質のスキン材１が被覆
された取付座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。なお，図１６には，サンドイッ
チ成形品の取付座９１において，その先端部に上記捨て
タブによって形成されたタブ品９５と小流路によって形
成された小流路品９５１とが示されている。これらのタ
ブ品９５，小流路品９５１は成形型から長尺サンドイッ
チ成形品を取り出したときには一体的に形成されている
が，その後除去される。As a result, as shown in FIG. 17, a mounting seat 91 having a hard core material 2 inside and a soft skin material 1 on the surface is formed. This is the main body 90
The same is true for. In addition, FIG. 16 shows, in the mounting seat 91 of the sandwich molded product, a tab product 95 formed by the aforesaid tab and a small flow path product 951 formed by the small flow path at the tip thereof. These tab product 95 and small flow channel product 951 are integrally formed when the long sandwich molded product is taken out from the molding die, but are removed thereafter.

【０００７】[0007]

【解決しようとする課題】しかしながら，従来の長尺サ
ンドイッチ成形品には，その取付座に関して次の問題が
ある。即ち，従来の取付座９１は，前記のごとく，表面
にスキン材１を有している。そのため，その座面部９１
３の表面が軟質となり，表面硬度，剛性が不足してい
る。[Problems to be Solved] However, the conventional long sandwich molded product has the following problems with respect to its mounting seat. That is, the conventional mounting seat 91 has the skin material 1 on the surface as described above. Therefore, the seat 91
The surface of No. 3 becomes soft and the surface hardness and rigidity are insufficient.

【０００８】それ故，上記のごとくクリップ９６を係合
し，該クリップ９６を車体等の相手部材に係合した場
合，長期間の使用中に，座ゆるみが生じる。その結果，
クリップ９６の係合に不具合を生じ，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。Therefore, when the clip 96 is engaged as described above and the clip 96 is engaged with the mating member such as the vehicle body, the seat is loosened during long-term use. as a result,
There is a problem in the engagement of the clip 96, and the over fender 9
There is a risk that a gap will occur between the car and the car body. In particular, since the over fender 9 is a long molded product, the seat loosening described above has a great influence on the displacement of the entire mounting position.

【０００９】また，オーバフェンダ９のごとき，長尺サ
ンドイッチ成形品においては，取付座は両端部，及び，
中央部の１〜数ヶ所に設けてある。そして，長尺状の成
形品においては上記の座ゆるみは比較的端部において生
じ易い。特に，上記オーバフェンダ９のごとき曲線形状
を有する長尺サンドイッチ成形品においては，その端部
に位置する端部取付座における座ゆるみは全体の位置ズ
レに大きな影響を及ぼす。本発明は，かかる従来の問題
点に鑑み，端部取付座の座面部における座ゆるみの発生
がない，長尺サンドイッチ成形品及びその成形方法を提
供しようとするものである。Further, in a long sandwich molded article such as the over fender 9, the mounting seat has both end portions, and
It is provided at one to several places in the central part. Further, in the long molded product, the above-mentioned loosening of the seat is relatively likely to occur at the end portion. In particular, in a long sandwich molded product having a curved shape such as the above-mentioned over fender 9, the looseness of the seat at the end mounting seat located at the end thereof has a great influence on the overall positional deviation. In view of the above conventional problems, the present invention is to provide a long sandwich molded product and a molding method thereof, in which seat loosening does not occur in the seat surface portion of the end mounting seat.

【００１０】[0010]

【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により成形さ
れ，複数の取付座を有する長尺状の長尺サンドイッチ成
形品であって，上記複数の取付座のうち成形品の端部に
位置する端部取付座は，その座面部の表面がコア材によ
って形成されていることを特徴とする長尺サンドイッチ
成形品にある。SUMMARY OF THE INVENTION The present invention is an elongated long sandwich molded article which is molded from a synthetic resin core material and a synthetic resin skin material coated on the surface thereof and has a plurality of mounting seats. Of the plurality of mounting seats, the end mounting seat located at the end of the molded product is a long sandwich molded product characterized in that the surface of the seat surface is formed of a core material.

【００１１】本発明において最も注目すべき点は，長尺
サンドイッチ成形品の上記端部取付座における座面部
は，その表面がコア材によって形成されていることであ
る。上記座面部の表面がコア材によって形成される態様
としては，座面部の表側面のみ，或いは表側面及び裏側
面の表面がコア材によって被覆された態様，更には座面
部の殆ど全部がコア材によって形成されている態様があ
る。The most notable point in the present invention is that the seat surface portion of the above-mentioned end mounting seat of the long sandwich molded article has the surface formed by the core material. As a mode in which the surface of the seat surface portion is formed by the core material, only the front side surface of the seat surface portion, or the surface of the front side surface and the back side surface is covered with the core material, or almost all of the seat surface portion is the core material. There is a mode that is formed by.

【００１２】更に，座面部の表側面，裏側面及び取付穴
の表面がコア材によって形成され，これらの間にはスキ
ン材が介在している態様がある（図１）。これらいずれ
の態様においても，成形品の本体はサンドイッチ構造を
有する。また，端部取付座における上記座面部の態様
は，端部取付座に限らず他の取付座に適用しうることは
勿論である。Further, there is a mode in which the front side surface, the back side surface of the seat surface portion and the surface of the mounting hole are formed by a core material, and a skin material is interposed between these (FIG. 1). In any of these embodiments, the body of the molded article has a sandwich structure. In addition, it goes without saying that the form of the seat surface portion of the end mounting seat is not limited to the end mounting seat and can be applied to other mounting seats.

【００１３】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, a hard ABS resin,
Examples include hard PVC resin and polypropylene resin containing filler such as talc. Also, there are resins in which glass fibers and the like are mixed with these resins. As the skin material, resin made by blending EPDM with soft polypropylene, EVA resin, SEBS (styrene-ethylene-
Butylene / styrene) resin, SBS (styrene / butadiene / styrene) resin, or soft PVC resin.

【００１４】次に，上記長尺サンドイッチ成形品を製造
する方法としては，複数の取付座を有し，そのうち端部
に位置する端部取付座はその座面部の表面がコア材によ
って形成されている長尺サンドイッチ成形品を形成する
に当たり，上記長尺サンドイッチ成形品を成形するキャ
ビティを有する成形型を用い，上記キャビティ内にスキ
ン材を射出し，次いで該スキン材の内部にコア材を注入
する方法であって，上記成形型は上記端部取付座を成形
する端部キャビティに小流路を介して捨てタブを有して
なり，かつ上記小流路には流れ抵抗を大きくするための
絞り通路を設けてなることを特徴とする長尺サンドイッ
チ成形品の成形方法がある。Next, as a method for manufacturing the above-mentioned long sandwich molded article, a plurality of mounting seats are provided, and an end mounting seat located at an end of the mounting seat is formed by a core material on the surface of the seating surface. In forming a long sandwich molded product, a mold having a cavity for molding the long sandwich molded product is used, a skin material is injected into the cavity, and then a core material is injected into the skin material. The molding die comprises a drain tab through a small channel in an end cavity forming the end mounting seat, and the small channel has a throttle for increasing flow resistance. There is a method for forming a long sandwich molded article which is characterized in that a passage is provided.

【００１５】本方法において最も注目すべき点は，上記
端部取付座を成形するための端部キャビティに小流路を
介して捨てタブを設け，かつ上記小流路には上記絞り通
路を設けたことにある。上記絞り通路は，スキン材の射
出時には，該スキン材を上記絞り通路より前方（キャビ
ティ側）に留めておいて，捨てタブへの流出を阻止して
おき，コア材の注入時に該コア材が端部取付座のスキン
材中に注入されて来たとき，その注入力によって端部取
付座内の一部のスキン材を捨てタブへ流出させるように
するものである。The most notable point in this method is that the end cavity for molding the end mounting seat is provided with a discarding tab through a small passage, and the small passage is provided with the throttle passage. There is something. When the skin material is injected, the restricting passage is kept in front of the restricting passage (on the cavity side) to prevent the skin material from flowing out to the discarding tab. When injected into the skin material of the end mounting seat, the pouring force causes a part of the skin material in the end mounting seat to flow out to the discard tab.

【００１６】そして，このスキン材の流出によって，コ
ア材が端部取付座内に更に流入し，多量のコア材がスキ
ン材の表面に逆転移行し，端部取付座の表面にコア材が
形成される。即ち，上記絞り通路は，端部キャビティ内
に射出されたスキン材が，コア材が注入されるまでは，
捨てタブの方向へ流出しないようにするための一種のセ
キである。By this outflow of the skin material, the core material further flows into the end mounting seat, a large amount of the core material is transferred to the surface of the skin material in reverse, and the core material is formed on the surface of the end mounting seat. To be done. That is, in the throttle passage, until the skin material injected into the end cavity is injected with the core material,
This is a kind of cough to prevent it from flowing toward the discard tab.

【００１７】そして，上記小流路は，その高さが１〜３
ｍｍ，絞り通路はその高さが０．１〜１．０ｍｍである
ことが好ましい。小流路が１ｍｍ未満では，スキン材の
中へコア材を注入した際，スキン材が捨てタブへ流れ難
いため，表面がコア材によって形成された上記構造の端
部取付座を得難い。一方，３ｍｍを越えると，コア材を
注入する前にスキン材が捨てタブへ流れてしまい，コア
材が端部取付座へ注入され難くなり，端部取付座の表面
にコア材を逆転移行させることができないおそれがあ
る。The height of the small channel is 1 to 3.
mm, and the height of the throttle passage is preferably 0.1 to 1.0 mm. When the small flow path is less than 1 mm, when the core material is injected into the skin material, the skin material is unlikely to flow into the discarding tab, so that it is difficult to obtain the end mounting seat of the above structure in which the surface is formed of the core material. On the other hand, if it exceeds 3 mm, the skin material flows into the discarding tab before the core material is injected, and it becomes difficult to inject the core material into the end mounting seat, and the core material is transferred to the surface of the end mounting seat in reverse. It may not be possible.

【００１８】また，絞り通路に関しては，その高さが
０．１ｍｍ未満の場合には，上記小流路の下限と同様に
コア材の注入時にスキン材が捨てタブへ流れ難い。一
方，１．０ｍｍを越えると，端部取付座へ流入したコア
材がスキン材の中を流れて捨てタブへ流出してしまい，
端部取付座の表面へのコア材の逆転移行ができなくなる
おそれがある。また，上記端部取付座以外の中央取付座
においては，その全体を殆どコア材によって成形するこ
ともできる（実施例３参照）。With respect to the throttle passage, if the height is less than 0.1 mm, it is difficult for the skin material to flow into the discarding tab when the core material is injected, like the lower limit of the small flow passage. On the other hand, if it exceeds 1.0 mm, the core material that has flowed into the end mounting seat flows through the skin material and flows out to the discard tab.
There is a risk that the core material cannot be transferred to the surface of the end mounting seat in the reverse direction. Further, in the central mounting seats other than the end mounting seats, the whole of the central mounting seats can be molded with the core material (see Example 3).

【００１９】[0019]

【作用及び効果】本発明の上記長尺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，端部取付
座はその座面部の表面がコア材によって形成されてい
る。そのため，長尺サンドイッチ成形品の全体は，サン
ドイッチ構造本来の表面柔軟性と内部剛性という優れた
性質を兼備しており，一方端部取付座は相手部材への取
付部として優れた剛性を有している。In the long sandwich molded article of the present invention, the main body has a sandwich structure, and the seating surface of the end mounting seat is formed of the core material. Therefore, the whole long sandwich molded product has excellent properties of surface flexibility and internal rigidity inherent to the sandwich structure, while the end mounting seat has excellent rigidity as a mounting part to the mating member. ing.

【００２０】特に端部取付座の座面部は，その表面にコ
ア材を有している。そのため，その表面が硬質である。
それ故，クリップ等の取付具を係合した場合でも，該取
付具を強く係合しておくことができ，表面が軟質のスキ
ン材で形成されたサンドイッチ構造の場合のように，座
ゆるみを生ずることがない。Particularly, the seat surface of the end mounting seat has a core material on the surface thereof. Therefore, its surface is hard.
Therefore, even when a fitting such as a clip is engaged, the fitting can be strongly engaged, and the seat is not loosened as in the case of a sandwich structure in which the surface is formed of a soft skin material. It never happens.

【００２１】また，上記製造方法による場合には，端部
取付座においては，上記のごとく，まずこれを成形する
ための端部キャビティ内にスキン材が流入されてくる。
このスキン材は，端部キャビティ内にほぼ充満した後，
捨てタブに通ずる小流路に入る。しかし，小流路には，
通路面積が小流路よりも小さい絞り通路が設けてある。
そのため，スキン材はそれ以上端部キャビティ内に入ら
ない。Further, in the case of the above manufacturing method, in the end mounting seat, as described above, the skin material first flows into the end cavity for molding the same.
After the skin material has almost filled the end cavity,
Enter the small channel leading to the discard tab. However, in the small channel,
A throttle passage having a passage area smaller than that of the small passage is provided.
Therefore, the skin material cannot enter the end cavity any more.

【００２２】次に，スキン材中にコア材が注入され，該
コア材が端部キャビティ内に入って来ると，端部キャビ
ティ内のスキン材の一部は小流路に近い部分から小流
路，絞り通路を経て捨てタブ内に入る。そして，更に注
入されて来たコア材は，上記小流路の入口付近まで来る
が，このとき小流路内及び捨てタブ内は多くのスキン材
で埋められかつ上記絞り通路がある。そのため，端部キ
ャビティの壁面方向，つまり端部取付座の表面へ回り込
みを起こす。つまり，コア材の逆転移行を生ずる。Next, when the core material is injected into the skin material and the core material enters the end cavity, a part of the skin material in the end cavity flows from a portion near the small flow path into a small flow. After passing through the road and the throttle passage, enter the discard tab. The further injected core material reaches the vicinity of the entrance of the small flow path, but at this time, the small flow path and the discarding tab are filled with many skin materials and have the throttle passage. Therefore, it wraps around the wall surface of the end cavity, that is, the surface of the end mounting seat. That is, the reverse transition of the core material occurs.

【００２３】それ故，端部取付座の座面部の表面にコア
材が形成されることになる。したがって，本方法によれ
ば，端部取付座の座面部の表面がコア材によって形成さ
れた長尺サンドイッチ成形品を得ることができる。以上
のごとく，本発明によれば，端部取付座の座面部におけ
る座ゆるみの発生がない，長尺サンドイッチ成形品及び
その成形方法を提供することができる。Therefore, the core material is formed on the surface of the seat surface of the end mounting seat. Therefore, according to this method, it is possible to obtain a long sandwich molded article in which the surface of the seat surface portion of the end mounting seat is formed of the core material. As described above, according to the present invention, it is possible to provide a long sandwich molded product and a molding method thereof, in which seat loosening does not occur in the seat surface portion of the end mounting seat.

【００２４】[0024]

【実施例】【Example】

実施例１ 本発明の実施例にかかる長尺サンドイッチ成形品につ
き，図１〜図３を用いて説明する。本例の長尺サンドイ
ッチ成形品は，図３及び前記図１５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。Example 1 A long sandwich molded article according to an example of the present invention will be described with reference to FIGS. As shown in FIG. 3 and FIG. 15, the long sandwich molded article of this example has an overfender 9 mounted on the vehicle body above the front wheels of a small truck.
Is.

【００２５】このオーバフェンダ９は，図３に示すごと
く，円弧形状の本体９０と，その端部に設けた端部取付
座３と，中央取付座３０とボス９３とを有する。上記端
部取付座３は，同図の左方端部にも設けられており（図
示略），オーバフェンダ９の両端部に設けてある。As shown in FIG. 3, the overfender 9 has an arc-shaped main body 90, an end mounting seat 3 provided at its end, a central mounting seat 30 and a boss 93. The end mounting seats 3 are also provided at the left end of the figure (not shown), and are provided at both ends of the over fender 9.

【００２６】なお，同図において符号４０は，成形時の
ゲート跡を示している。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。In the figure, reference numeral 40 indicates a gate mark at the time of molding. Further, as shown in FIGS. 1 and 2, the main body 90 of the over fender 9 has a sandwich structure composed of a synthetic resin core material 2 and a synthetic resin skin material 1 coated on the surface thereof.

【００２７】また，端部取付座３は，座面部３２と該座
面部３２と本体９０との間に設けられた脚部３３と，座
面部３２に設けた取付穴３１とよりなる。取付穴３１に
は，クリップ９６が係合される。そして，端部取付座３
においては，その脚部３３は，本体９０とほぼ同様にサ
ンドイッチ構造を有している。一方，座面部３２は，そ
の表面がコア材２により形成されている。即ち，座面部
３２は，その表側面３２１，裏側面３２２，及び取付穴
３１の表面がコア材２により被覆されている。そして，
これらの各コア材２の層の間には，スキン材１の層が２
層状に介在している。The end mounting seat 3 comprises a seat surface portion 32, a leg portion 33 provided between the seat surface portion 32 and the main body 90, and a mounting hole 31 provided in the seat surface portion 32. The clip 96 is engaged with the mounting hole 31. And the end mounting seat 3
In, the leg portion 33 has a sandwich structure similar to that of the main body 90. On the other hand, the seat surface portion 32 has a surface formed of the core material 2. That is, in the seat surface portion 32, the front surface 321, the back surface 322, and the surface of the mounting hole 31 are covered with the core material 2. And
Between each of these layers of core material 2 is a layer of skin material 1
They are laid in layers.

【００２８】上記の表面におけるコア材２の層は，実施
例２に示すごとく，コア材２の逆転移行によって形成さ
れたものである。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，スキン材としては軟質合成樹脂のＳＥＢＳ樹脂を用
いた。本例のオーバフェンダ９においては，本体９０は
サンドイッチ構造を有し，端部取付座３の座面部３１の
表面が硬質のコア材２によって形成されている。The layer of the core material 2 on the above-mentioned surface is formed by the reverse transfer of the core material 2 as shown in the second embodiment. In this example, a polypropylene resin containing hard synthetic resin glass fiber was used as the core material, and a soft synthetic resin SEBS resin was used as the skin material. In the over fender 9 of this example, the main body 90 has a sandwich structure, and the surface of the seat surface portion 31 of the end mounting seat 3 is formed by the hard core material 2.

【００２９】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，一方端部取付座３
の座面部３２は優れた剛性を有している。それ故，端部
取付座にクリップ９６を係合した場合でも，該クリップ
９６を強く係合しておくことができ，サンドイッチ構造
の場合のような座ゆるみを生ずることがない。Therefore, the entire over fender 9 has the excellent properties inherent to the sandwich structure, and the one end mounting seat 3
The seat surface portion 32 has excellent rigidity. Therefore, even when the clip 96 is engaged with the end mounting seat, the clip 96 can be strongly engaged, and seat loosening unlike in the sandwich structure does not occur.

【００３０】実施例２ 次に，実施例１に示した，長尺サンドイッチ成形品とし
てのオーバフェンダの成形方法について，図４〜図８を
用いて，主として端部取付座の成形を中心に説明する。
本例においては，図４に示す成形型４を用い，該成形型
４のキャビティ４１内にスキン材１を射出し，次いで該
スキン材１の内部にコア材２を注入するサンドイッチ成
形方法を用いる。Example 2 Next, a method of forming the over-fender as the long sandwich molded article shown in Example 1 will be described with reference to FIGS. To do.
In this embodiment, a sandwich molding method is used in which the molding die 4 shown in FIG. 4 is used, the skin material 1 is injected into the cavity 41 of the molding die 4, and then the core material 2 is injected into the skin material 1. .

【００３１】そして，上記成形型４は，図４に示すごと
く，上記端部取付座３を成形するための端部キャビティ
４３と，該端部キャビティ４３に小流路４４を介して捨
てタブ４６を有する。また，小流路４４には流れ抵抗を
大きくするための絞り通路４５を有している。絞り通路
４５は，突起４５１により，小流路４４よりも狭い通路
面積に形成してある。本例においては，上記小流路の高
さは３ｍｍ，絞り通路の高さは０．５ｍｍとした。As shown in FIG. 4, the molding die 4 has an end cavity 43 for molding the end mounting seat 3 and a discard tab 46 in the end cavity 43 via a small channel 44. Have. Further, the small passage 44 has a throttle passage 45 for increasing the flow resistance. The throttle passage 45 is formed by the projection 451 in a passage area narrower than that of the small passage 44. In this example, the height of the small flow path was 3 mm and the height of the throttle passage was 0.5 mm.

【００３２】以下，端部取付座の成形，即ち端部キャビ
ティ４３におけるスキン材１とコア材２の流れを中心に
説明する。まず，ゲートよりキャビティ４１内に射出さ
れたスキン材１は，図５に示すごとく，端部キャビティ
４３内に流入し，更に小流路４４内に流入する。しか
し，その内部に設けた小断面の絞り通路４５によって，
スキン材１は捨てタブ４６への流出が阻止される。この
とき，端部キャビティ４３内は，スキン材１によってほ
ぼ充満されている。Hereinafter, the molding of the end mounting seat, that is, the flow of the skin material 1 and the core material 2 in the end cavity 43 will be mainly described. First, the skin material 1 injected from the gate into the cavity 41 flows into the end cavity 43 and further into the small flow path 44 as shown in FIG. However, due to the narrow cross-section throttle passage 45 provided inside,
The skin material 1 is prevented from flowing out to the discarding tab 46. At this time, the inside of the end cavity 43 is almost filled with the skin material 1.

【００３３】次に，スキン材１の中にコア材２が注入さ
れる。そして，図６に示すごとく，コア材２が端部キャ
ビティ４３内のスキン材１内に流入してくる。そこで，
スキン材１の一部は，小流路４４に近い部分から，小流
路４４，絞り通路４５を経て捨てタブ４６内に入ってい
く。そして，更に注入されて来たコア材２は，上記小流
路４４の入口近くまで来るが，このとき捨てタブ４６内
は，既に多くのスキン材１によりその大部分が埋められ
ており，かつ絞り通路４５がある。Next, the core material 2 is injected into the skin material 1. Then, as shown in FIG. 6, the core material 2 flows into the skin material 1 in the end cavity 43. Therefore,
A part of the skin material 1 enters the inside of the discarding tab 46 from the portion close to the small flow path 44 through the small flow path 44 and the throttle passage 45. Then, the core material 2 that has been further injected reaches the vicinity of the entrance of the small flow path 44, but at this time, most of the skin material 1 is already buried in the discarding tab 46, and There is a throttle passage 45.

【００３４】そのため，図７，図８に示すごとく，コア
材２は，端部キャビティ４３の壁面方向，つまり端部取
付座の表面へ回り込みを起こす。即ち，コア材の逆転移
行を生ずる。それ故，前記図１，図２に示したごとく，
端部取付座３の座面部３１の表面に，コア材２が形成さ
れることになる。上記のごとく，本例によれば，端部取
付座の座面部の表面がコア材２によって形成された，長
尺サンドイッチ成形品としてのオーバフェンダ９を成形
することができる。Therefore, as shown in FIGS. 7 and 8, the core material 2 wraps around the wall surface of the end cavity 43, that is, the surface of the end mounting seat. That is, the reverse transition of the core material occurs. Therefore, as shown in FIG. 1 and FIG.
The core material 2 is formed on the surface of the seat surface portion 31 of the end attachment seat 3. As described above, according to this example, it is possible to mold the over fender 9 as a long sandwich molded product in which the surface of the seat surface of the end mounting seat is formed by the core material 2.

【００３５】実施例３ 本例は，図９〜図１４に示すごとく，実施例１に示した
オーバフェンダ９において，その中央取付座３０（図
３）を殆どコア材２のみによって形成したものである。
このような中央取付座３０は，図９，図１０に示す構造
を有し，図１１〜図１４に示すコアバック方式によって
成形する。Embodiment 3 In this embodiment, as shown in FIGS. 9 to 14, the center mounting seat 30 (FIG. 3) of the overfender 9 shown in Embodiment 1 is formed almost entirely by the core material 2. is there.
Such a central mounting seat 30 has the structure shown in FIGS. 9 and 10, and is molded by the core back method shown in FIGS. 11 to 14.

【００３６】まず，図９，図１０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。一方，中央取付座３０は，
その殆どがコア材２によって成形されている。中央取付
座３０における上記コア材２の層は，本体９０より立設
さた脚部３３の付け根３３１において，スキン材１の層
を突き破って，コア材２を流入させることにより成形さ
せたものである。First, as shown in FIGS. 9 and 10, 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 the surface thereof. ing. On the other hand, the central mounting seat 30
Most of them are molded by the core material 2. The layer of the core material 2 in the central mounting seat 30 is formed by breaking through the layer of the skin material 1 at the base 331 of the leg portion 33 erected from the main body 90 and allowing the core material 2 to flow in. is there.

【００３７】上記中央取付座３０及び本体９０の成形に
ついて，以下に図１１〜図１４を用いて説明する。本例
においては，図１１に示す成形型５を用い，その中にス
キン材１を射出し（図１２），次いでコア材２を注入し
（図１３），その後スライドコア５５を後退させて，中
央取付座３０成形用のサブキャビティ５５０内にコア材
２を流入させる（図１４）ことによりオーバフェンダ９
を成形する。The molding of the central mounting seat 30 and the main body 90 will be described below with reference to FIGS. 11 to 14. In this example, using the mold 5 shown in FIG. 11, the skin material 1 is injected into it (FIG. 12), the core material 2 is then injected (FIG. 13), and then the slide core 55 is retracted, The core material 2 is caused to flow into the sub-cavity 550 for molding the central mounting seat 30 (FIG. 14), thereby overfender 9
To mold.

【００３８】即ち，上記成形型５は，図１１に示すごと
く，オーバフェンダの本体を成形するためのキャビティ
５１を有し，また中央取付座３０を成形するサブキャビ
ティ５５０（図１４）を構成するための固定コア５６と
スライドコア５５とを有する。そして，成形に当たって
は，まず図１１に示すごとく，スライドコア５５を前進
させてサブキャビティ５５０は閉止した状態としてお
く。即ち，スライドコア５５は固定コア５６と接触し
て，サブキャビティ５５０は形成されていない状態とす
る。That is, as shown in FIG. 11, the molding die 5 has a cavity 51 for molding the main body of the over fender, and constitutes a sub-cavity 550 (FIG. 14) for molding the central mounting seat 30. Has a fixed core 56 and a slide core 55. In molding, first, as shown in FIG. 11, the slide core 55 is advanced and the sub-cavity 550 is closed. That is, the slide core 55 contacts the fixed core 56, and the sub-cavity 550 is not formed.

【００３９】次に，図１２に示すごとく，キャビティ５
１内にゲート（図示略）より，スキン材１を射出する。
このスキン材１の射出量は，サンドイッチ成形品の本体
部分においてスキン材層を形成するに必要な量である。
次に，図１３に示すごとく，上記スキン材１の中にコア
材２を注入する。このコア材２の量は，本体部分におい
て，コア材層を形成するに必要な量である。Next, as shown in FIG. 12, the cavity 5
A skin material 1 is injected into the inside 1 from a gate (not shown).
The injection amount of the skin material 1 is the amount required to form the skin material layer in the main body portion of the sandwich molded product.
Next, as shown in FIG. 13, the core material 2 is injected into the skin material 1. The amount of the core material 2 is the amount necessary to form the core material layer in the main body portion.

【００４０】そして，上記本体部分に必要な量のコア材
２を充填した後，更にコア材２を注入しながら，図１４
に示すごとく，スライドコア５５を後退させてサブキャ
ビティ５５０を開く。そのため，キャビティ５１内に注
入されているコア材２は，キャビティ５１の外周部分
と，開放された上記サブキャビティ５５０との間にある
スキン材１の層１５を突き破って，サブキャビティ５５
０内に流入する。Then, after filling the required amount of the core material 2 into the main body portion, while further injecting the core material 2 as shown in FIG.
As shown in FIG. 5, the slide core 55 is retracted to open the sub-cavity 550. Therefore, the core material 2 injected into the cavity 51 breaks through the layer 15 of the skin material 1 between the outer peripheral portion of the cavity 51 and the opened sub-cavity 550, and the sub-cavity 55
It flows into 0.

【００４１】この時，上記スキン材１の層は，既にキャ
ビティ５１の壁面によって冷却固化しつつあるので，上
記コア材２によって突き破られるものの，サブキャビテ
ィ５５０内へは殆ど流入しない。それ故，サブキャビテ
ィ５５０内は殆どコア材２が充填される。なお，その後
は，常法により成形型内において成形品を冷却し，次い
でサンドイッチ成形品を取り出す。At this time, since the layer of the skin material 1 has already been cooled and solidified by the wall surface of the cavity 51, it is pierced by the core material 2 but hardly flows into the sub-cavity 550. Therefore, the sub-cavity 550 is almost filled with the core material 2. After that, the molded product is cooled in a molding die by a conventional method, and then the sandwich molded product is taken out.

【００４２】このサンドイッチ成形品において，その中
央取付座３０は，前記図１０，図１１に示した構造を有
している。また，このサンドイッチ成形品の本体９０に
関しては，その意匠面（オーバフェンダにおいて，上記
中央取付座３０が設けられている面と反対の表側面）は
平滑であり，美しい面を有している。上記により得られ
たオーバフェンダは，端部取付座３は実施例１に示した
ごとき構造を有し，一方中央取付座３０は上記構造を有
しており，これらの取付座は，共に優れた剛性を有し，
実施例１と同様の効果を発揮することができる。In this sandwich molded product, the central mounting seat 30 has the structure shown in FIGS. 10 and 11. Further, with respect to the main body 90 of this sandwich molded product, its design surface (the front side surface opposite to the surface on which the central mounting seat 30 is provided in the over fender) is smooth and has a beautiful surface. In the overfender obtained as described above, the end mounting seat 3 has the structure as shown in Example 1, while the central mounting seat 30 has the above structure, and these mounting seats are both excellent. Has rigidity,
The same effect as that of the first embodiment can be exhibited.

【図面の簡単な説明】[Brief description of drawings]

【図１】実施例１にかかる，オーバフェンダの端部取付
座の断面図。FIG. 1 is a cross-sectional view of an end mounting seat of an over fender according to a first embodiment.

【図２】図１のＡ−Ａ線矢視断面図。FIG. 2 is a sectional view taken along the line AA of FIG.

【図３】実施例１にかかるオーバフェンダの斜視図。FIG. 3 is a perspective view of the over fender according to the first embodiment.

【図４】実施例２の成形方法にかかる成形型の断面図で
図８のＣ−Ｃ線矢視相当図。FIG. 4 is a cross-sectional view of a molding die according to a molding method of Example 2 and is a view corresponding to the line CC in FIG.

【図５】実施例２における，スキン材射出時の成形型の
断面図。FIG. 5 is a cross-sectional view of a molding die during injection of a skin material according to the second embodiment.

【図６】実施例２における，コア材注入時の成形型の断
面図。FIG. 6 is a cross-sectional view of a molding die when pouring a core material in Example 2.

【図７】実施例２における，コア材の逆転移行時の成形
型の断面図。FIG. 7 is a cross-sectional view of the molding die when the core material is transferred in the reverse direction in the second embodiment.

【図８】図７のＢ−Ｂ線矢視断面図。8 is a sectional view taken along the line BB of FIG.

【図９】実施例３にかかるオーバフェンダの中央取付座
の断面図。FIG. 9 is a sectional view of a central mounting seat of the over fender according to the third embodiment.

【図１０】図９のＤ−Ｄ線矢視断面図。10 is a cross-sectional view taken along the line DD of FIG.

【図１１】実施例３の成形方法における成形型の断面
図。FIG. 11 is a cross-sectional view of a molding die according to the molding method of Example 3.

【図１２】実施例３におけるスキン材射出時の成形型の
断面図。FIG. 12 is a cross-sectional view of a molding die during injection of a skin material according to the third embodiment.

【図１３】実施例３におけるコア材注入時の成形型の断
面図。FIG. 13 is a cross-sectional view of a molding die when pouring a core material in Example 3.

【図１４】実施例３における中央取付座へのコア材流入
時の成形型の断面図。FIG. 14 is a cross-sectional view of the molding die when the core material flows into the central mounting seat in the third embodiment.

【図１５】従来例における小型トラックの側面図。FIG. 15 is a side view of a conventional light truck.

【図１６】従来例におけるオーバフェンダの端部取付座
付近の斜視図。FIG. 16 is a perspective view around an end mounting seat of an over fender in a conventional example.

【図１７】従来例におけるオーバフェンダの端部取付座
の断面図。FIG. 17 is a cross-sectional view of an end mounting seat of an over fender in a conventional example.

【符号の説明】[Explanation of symbols]

１．．．スキン材， ２．．．コア材， ３．．．端部取付座， ３０．．．中央取付座， ３１．．．取付穴， ３２．．．座面部， ４．．．成形型， ４１．．．キャビティ， ４３．．．端部キャビティ， ４４．．．小流路， ４５．．．絞り通路， ４６．．．捨てタブ， ５．．．成形型， ５５．．．スライドコア， ５５０．．．サブキャビティ， ９．．．オーバフェンダ， ９０．．．本体， 1. ． ． Skin material, 2. ． ． Core material, 3. ． ． End mounting seat, 30. ． ． Central mounting seat, 31. ． ． Mounting hole, 32. ． ． Seat surface portion, 4. ． ． Mold, 41. ． ． Cavity, 43. ． ． End cavity, 44. ． ． Small channel, 45. ． ． Throttle passage, 46. ． ． Discard tab, 5. ． ． Mold, 55. ． ． Slide core, 550. ． ． Sub-cavity, 9. ． ． Over fender, 90. ． ． Body,

フロントページの続き (72)発明者 向井 浩 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 (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Front Page Continuation (72) Inventor Hiroshi Mukai 1 Ochiai, Nagachi, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture, Toyoda Gosei Co., Ltd. In the company

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 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により成形され，複数の取付座
を有する長尺状の長尺サンドイッチ成形品であって，上
記複数の取付座のうち成形品の端部に位置する端部取付
座は，その座面部の表面がコア材によって形成されてい
ることを特徴とする長尺サンドイッチ成形品。1. An elongate long sandwich molded article which is molded from a synthetic resin core material and a synthetic resin skin material coated on the surface thereof and has a plurality of mounting seats. An end-mounting seat located at the end of the molded part of the seat is a long sandwich molded product characterized in that the surface of the seat surface part is formed of a core material. 【請求項２】 請求項１において，座面部の表側面及び
裏側面の表面がコア材によって形成されていることを特
徴とする長尺サンドイッチ成形品。2. The long sandwich molded article according to claim 1, wherein the front surface and the back surface of the seat surface portion are formed of a core material. 【請求項３】 請求項１において，座面部の表側面，裏
側面及び取付穴の表面はコア材により形成され，これら
の間にはスキン材が介在していることを特徴とする長尺
サンドイッチ成形品。3. The long sandwich according to claim 1, wherein the front side surface, the back side surface of the seat surface portion and the surface of the mounting hole are formed of a core material, and a skin material is interposed therebetween. Molding. 【請求項４】 複数の取付座を有し，そのうち端部に位
置する端部取付座はその座面部の表面がコア材によって
形成されている長尺サンドイッチ成形品を成形するに当
たり，上記長尺サンドイッチ成形品を形成するキャビテ
ィを有する成形型を用い，上記キャビティ内にスキン材
を射出し，次いで該スキン材の内部にコア材を注入する
方法であって，上記成形型は上記端部取付座を成形する
端部キャビティに小流路を介して捨てタブを有してな
り，かつ上記小流路には流れ抵抗を大きくするための絞
り通路を設けてなることを特徴とする長尺サンドイッチ
成形品の成形方法。4. A long sandwich molded product having a plurality of mounting seats, of which the end mounting seats located at the ends are formed into a long sandwich molding product in which the surface of the seat surface is formed of a core material. A method for injecting a skin material into the cavity, and then injecting a core material into the skin material, using a mold having a cavity for forming a sandwich molded product, wherein the mold has the end mounting seat. Long sandwich molding, characterized in that the end cavity for molding is provided with a discarding tab through a small channel, and the small channel is provided with a throttling passage for increasing flow resistance. Molding method. 【請求項５】 請求項４において，上記小流路はその高
さが１〜３ｍｍであり，上記絞り通路はその高さが０．
１〜１．０ｍｍであることを特徴とする長尺サンドイッ
チ成形品の成形方法。5. The small passage according to claim 4, wherein the height of the small flow passage is 1 to 3 mm, and the height of the throttle passage is 0.
A method for molding a long sandwich molded article, which is 1 to 1.0 mm.
JP12550993A 1993-04-29 1993-04-29 Long sandwich molded article and molding method thereof Expired - Fee Related JP3158782B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12550993A JP3158782B2 (en) 1993-04-29 1993-04-29 Long sandwich molded article and molding method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12550993A JP3158782B2 (en) 1993-04-29 1993-04-29 Long sandwich molded article and molding method thereof

Publications (2)

Publication Number Publication Date
JPH06312436A true JPH06312436A (en) 1994-11-08
JP3158782B2 JP3158782B2 (en) 2001-04-23

Family

ID=14911896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12550993A Expired - Fee Related JP3158782B2 (en) 1993-04-29 1993-04-29 Long sandwich molded article and molding method thereof

Country Status (1)

Country Link
JP (1) JP3158782B2 (en)

Also Published As

Publication number Publication date
JP3158782B2 (en) 2001-04-23

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