JP2557717B2 - Sandwich moldings - Google Patents
Sandwich moldingsInfo
- Publication number
- JP2557717B2 JP2557717B2 JP2067901A JP6790190A JP2557717B2 JP 2557717 B2 JP2557717 B2 JP 2557717B2 JP 2067901 A JP2067901 A JP 2067901A JP 6790190 A JP6790190 A JP 6790190A JP 2557717 B2 JP2557717 B2 JP 2557717B2
- Authority
- JP
- Japan
- Prior art keywords
- layer material
- main body
- core layer
- skin layer
- mudguard
- 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 - Fee Related
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
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
Landscapes
- Engineering & Computer Science (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)
- Body Structure For Vehicles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は，自動車用のマッドガードのごとく，開口穴
と締付座とを有するサンドイッチ成形品の構造に関す
る。Description: TECHNICAL FIELD The present invention relates to a structure of a sandwich molded article having an opening hole and a tightening seat, such as a mudguard for an automobile.
例えば，第５図に示すごとく，自動車用のマッドガー
ド９は、本体部91と下片部92とよりなる。該下片部92に
は、該マッドガード９をボルトにより車体に取付けるた
めの締付座93を有する。該締付座93はボルト孔931を有
する。また，垂設された上記本体部91の下端には，略水
平状の下片部92との当接部に，開口穴94を有する。該開
口穴94は下片部92上に落下した雨水等を排出させるため
の水抜穴である。For example, as shown in FIG. 5, the mudguard 9 for an automobile comprises a main body 91 and a lower piece 92. The lower piece portion 92 has a tightening seat 93 for attaching the mudguard 9 to the vehicle body with bolts. The tightening seat 93 has a bolt hole 931. Further, an opening hole 94 is provided at the lower end of the vertically extending main body portion 91 at the contact portion with the substantially horizontal lower piece portion 92. The opening hole 94 is a drain hole for draining rainwater and the like that has dropped onto the lower piece portion 92.
また，上記マッドガード９は，第６図に示すごとく，
硬質のコア層３と，その周囲を被覆する表皮層２とから
なる。そして，上記コア層３の剛性と表皮層２の柔軟性
とにより，強度と弾性に優れた本体部91を構成してい
る。In addition, the mudguard 9 is, as shown in FIG.
It is composed of a hard core layer 3 and a skin layer 2 covering the periphery thereof. The rigidity of the core layer 3 and the flexibility of the skin layer 2 constitute a main body 91 having excellent strength and elasticity.
ところで，上記下片部92に設けた上記締付座93は、そ
のボルト孔931にボルトを差し込んで車体に締付ける部
位である。そのため，強度が高いことが要求される。By the way, the tightening seat 93 provided on the lower piece portion 92 is a portion for inserting a bolt into the bolt hole 931 and tightening the bolt to the vehicle body. Therefore, high strength is required.
しかしながら，上記従来のマッドガード９の締付座93
は，第６図に示すごとく，軟質の表皮層２によって構成
されているため剛性が低い。そのため，マッドガード９
の取付性が不充分となることがある。そこで，この締付
座93の部分も本体部91と同様に，コア層３と表皮層２と
からなる構造とすることが望まれる。However, the tightening seat 93 of the conventional mudguard 9 is used.
As shown in FIG. 6, since it is composed of the soft skin layer 2, the rigidity is low. Therefore, the mudguard 9
May be insufficiently attached. Therefore, like the main body 91, it is desirable that the portion of the fastening seat 93 also has a structure including the core layer 3 and the skin layer 2.
しかし、従来のマッドガード９においては、サンドイ
ッチ成形品の製造の際，成形型のキャビティ内におい
て，先に射出された表皮層材料の中にコア層材料を射出
したとき，該コア層材料を上記締付座93まで到達させる
ことができない。その理由は次のようである。However, in the conventional mudguard 9, when the sandwich molding product is manufactured, when the core layer material is injected into the previously injected skin layer material in the cavity of the mold, the core layer material is clamped as described above. Cannot reach seat 93. The reason is as follows.
即ち，第７図〜第９図に示すごとく，上記マッドガー
ド９を成形するための成形型８は，下型80と上型86（第
８図）とよりなる。下型80は，上記下片部92成形用の床
面82と、該床面82より立設された立型面81とを有する。
該立型面81は，マッドガード９の本体部91を成形する型
面である。そして，立型面81の下端の一部分には，上記
開口穴94を形成するための入子84が配置されている。ま
た，床面82には，締付座形成用の入子である凸状型面83
を有する。また，該下型80の上には，上型86を被冠す
る。該上型86の内面は，上記入子84の表面に面接触し，
該入子84の上面に成形材料（表皮層材料，コア層材料）
が来ないようにしている。That is, as shown in FIGS. 7 to 9, the molding die 8 for molding the mudguard 9 comprises a lower die 80 and an upper die 86 (FIG. 8). The lower mold 80 has a floor surface 82 for molding the lower piece portion 92, and a vertical mold surface 81 erected from the floor surface 82.
The vertical mold surface 81 is a mold surface for molding the main body 91 of the mudguard 9. An insert 84 for forming the opening hole 94 is arranged at a part of the lower end of the vertical surface 81. Further, on the floor surface 82, a convex mold surface 83 that is a nest for forming a tightening seat is formed.
Have. Further, an upper die 86 is capped on the lower die 80. The inner surface of the upper die 86 is in surface contact with the surface of the insert 84,
Molding material (skin layer material, core layer material) on the upper surface of the nest 84
Is trying not to come.
そして，上記成形型８においては、サンドイッチ成形
に当たって，まず表皮層材料20が射出される。次いで，
該表皮層材料20の中にコア層材料30が射出される。In the molding die 8, the skin layer material 20 is first injected during the sandwich molding. Then,
The core layer material 30 is injected into the skin layer material 20.
上記において，まず表皮層材料20は，上記成形型８の
立型面81に沿って下降し、床面82上に入る。そのため，
キャビティ内の大部分は表皮層材料20によって充填され
る。In the above, first, the skin layer material 20 descends along the vertical surface 81 of the molding die 8 and enters the floor surface 82. for that reason,
The skin layer material 20 fills most of the cavity.
次に，表皮層材料20内に射出されたコア層材料30の樹
脂流れは，立型面81に沿って垂下する。しかし，該立型
面81の下端には上記入子84がある。そのため，第７図〜
第９図に示すごとく，コア層材料30は，該入子84を中心
として左右方向に分断されて，分流301,302となって表
皮層材料20内を流れる。Next, the resin flow of the core layer material 30 injected into the skin layer material 20 hangs down along the vertical surface 81. However, at the lower end of the vertical surface 81, there is the nest 84. Therefore, from FIG.
As shown in FIG. 9, the core layer material 30 is divided in the left-right direction centering around the nest 84, and flows into the skin layer material 20 as split flows 301 and 302.
そして，上記分流301,302は，両者の間にも表皮層材
料20があるため，容易には合流できない。また，下流に
おいて，上記分流301,302が合流しようとしても，下流
には上記凸状型面83が存在するため，合流しきれない。The split flows 301 and 302 cannot be easily merged because the skin layer material 20 is present between them. Further, even if the split flows 301 and 302 are about to merge at the downstream side, the convex mold surface 83 exists at the downstream side, so that they cannot be merged together.
それ故、分流301,302は，第９図に示すごとく，締付
座形成用の凸状型面83の周囲に到達出来ないこととな
る。Therefore, the shunts 301, 302 cannot reach the periphery of the convex mold surface 83 for forming the tightening seat as shown in FIG.
その結果，前記第６図に示すごとく，締付座93の周囲
にコア層３が存在しないマッドガードしか得られないこ
ととなる。つまり，締付座93は，表皮層材料20のみで構
成されて剛性が低い。As a result, as shown in FIG. 6, only the mudguard in which the core layer 3 does not exist around the fastening seat 93 can be obtained. That is, the tightening seat 93 is composed of only the skin layer material 20 and has low rigidity.
本発明は，上記問題点に関して，キャビティ内におけ
るコア層材料の流れにつき鋭意検討を重ねた結果得られ
たものである。The present invention has been made as a result of intensive studies on the flow of the core layer material in the cavity with respect to the above problems.
即ち，本発明は上記従来の問題点に鑑み，開口穴を有
すると共に、剛性に優れた締付座を有する，サンドイッ
チ成形品の構造を提供しようとするものである。That is, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a structure of a sandwich molded product having an opening hole and a tightening seat having excellent rigidity.
本発明は，垂設された本体部と，該本体部の下端から
略水平状に突出して設けた下片部とよりなると共に上記
本体部と下片部との当接部には複数個の開口穴を有し，
また上記下片部にはボルト孔を設けた締付座を有し，か
つ上記本体部即から上記下片部側に向けて表皮層材料と
コア層材料とを順次射出することにより成形した合成樹
脂のサンドイッチ成形品であって， 上記締付座は，隣合う上記開口穴の間であって，かつ
上記本体部から遠い位置に設けてあり， また上記締付座は，硬質のコア層とその表面を包む軟
質の表皮層とにより構成され，かつ該締付座におけるボ
ルト孔の壁面は軟質の表皮層により被覆されていること
を特徴とするサンドイッチ成形品にある。The present invention comprises a vertically extending main body portion and a lower piece portion provided so as to project from the lower end of the main body portion in a substantially horizontal shape, and a plurality of abutting portions between the main body portion and the lower piece portion are provided. Has an opening hole,
The lower piece has a tightening seat with a bolt hole, and is formed by sequentially injecting the skin layer material and the core layer material from the main body portion toward the lower piece side. A resin sandwich molding, wherein the fastening seat is provided between the adjacent opening holes and at a position far from the main body, and the fastening seat includes a hard core layer and The sandwich molded article is characterized in that it is constituted by a soft skin layer that wraps the surface, and the wall surface of the bolt hole in the tightening seat is covered by the soft skin layer.
本発明において最も注目すべきことは，本体部と下片
部との当接部に開口穴を２個以上設け，これら開口穴の
間であって，かつ本体部から遠い位置，即ち樹脂流れの
下流，に締付座を配置したこと（第１図，第４図参
照），及び上記締付座におけるボルト孔の壁面は軟質の
表皮層により被覆されていること（第２図参照）にあ
る。What is most noticeable in the present invention is that two or more opening holes are provided in the contact portion between the main body portion and the lower piece portion, and the positions between the opening holes and far from the main body portion, that is, the resin flow The fastening seat is arranged downstream (see FIGS. 1 and 4), and the wall surface of the bolt hole in the fastening seat is covered with a soft skin layer (see FIG. 2). .
上記樹脂流れとは，サンドイッチ成形品を製造する際
の成形型内の表皮層材料の流れ及びコア層材料の流れ方
向をいう。そして，上記のごとく，表皮層材料及びコア
層材料は上記本体部から下片部に向けて射出されるの
で，本体部が樹脂流れの上流側，下片部がその下流側と
なる。The resin flow refers to the flow of the skin layer material and the flow direction of the core layer material in the molding die when the sandwich molded article is manufactured. As described above, since the skin layer material and the core layer material are injected from the main body portion toward the lower piece portion, the main body portion is the upstream side of the resin flow and the lower piece portion is the downstream side thereof.
また，上記開口穴とは前記マッドガードにおける水抜
穴，或いは各種サンドイッチ成形品における小窓，係止
孔などをいう。また，かかる開口穴を有するサンドイッ
チ成形品としては，前記マッドガードの外，各種自動車
部品，インテリア部品などがある。Further, the opening hole means a drain hole in the mudguard, or a small window or a locking hole in various sandwich molded products. In addition to the mudguard, various types of automobile parts, interior parts, and the like are examples of sandwich molded products having such openings.
本発明においては、下片部に設けられる締付座は隣合
う開口穴の間において本体部から遠い位置，つまり樹脂
流れの下流に設けてある。そのため、サンドイッチ成形
の際には，まず表皮層材料を成形型内に射出し，次いで
該表皮層材料の中にコア層材料を射出していくと，該コ
ア層材料は本体部から上記開口穴形成用の入子と入子と
の間を通って，締付座形成用入子に向かって流れる（第
４図参照）。そのため，コア層材料の樹脂流れは，締付
座の周囲に充分に入り込む。In the present invention, the tightening seat provided on the lower piece is provided at a position far from the main body between the adjacent opening holes, that is, downstream of the resin flow. Therefore, in sandwich molding, when the skin layer material is first injected into the molding die, and then the core layer material is injected into the skin layer material, the core layer material is injected from the main body into the opening hole. It flows between the forming inserts and toward the tightening seat forming inserts (see FIG. 4). Therefore, the resin flow of the core layer material sufficiently enters around the tightening seat.
したがって，サンドイッチ成形品における締付座は，
硬質のコア層材料とその外表面を覆う軟質の表皮層材料
とによって構成される。そのため，締付座は剛性に優れ
ている。また，該締付座におけるボルト孔の壁面は軟質
の表皮層により被覆された状態を形成している（第２図
参照）。また，該締付座を設けた位置よりも樹脂流れ上
方側に位置する上記当接部には，複数の開口穴が形成さ
れている。Therefore, the tightening seat in the sandwich molded product is
It is composed of a hard core layer material and a soft skin layer material covering the outer surface thereof. Therefore, the tightening seat has excellent rigidity. Further, the wall surface of the bolt hole in the tightening seat is in a state of being covered with a soft skin layer (see FIG. 2). Further, a plurality of opening holes are formed in the abutting portion located on the resin flow upper side of the position where the tightening seat is provided.
したがって，本発明よれば、開口穴を有すると共に，
剛性に優れた締付座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, according to the present invention, while having an opening hole,
It is possible to provide a sandwich molded article having a tightening seat with excellent rigidity.
本発明の実施例にかかるサンドイッチ成形品につき，
第１図〜第４図を用いて説明する。The sandwich molded article according to the embodiment of the present invention,
This will be described with reference to FIGS. 1 to 4.
本例のサンドイッチ成形品は，自動車用マッドガード
１である。該マッドガード１は，第１図に示すごとく，
前記従来のマッドガード（第５図）と同様に，垂設され
た本体部11と，該本体部の下端から略水平状に突出して
設けた下片部12と，該下片部12に設けた締付座13とより
なる。該締付座13には，ボルト孔131を有する。The sandwich molded article of this example is an automobile mudguard 1. The mudguard 1, as shown in FIG.
Similar to the conventional mudguard (FIG. 5), a vertically extending main body portion 11, a lower piece portion 12 protruding substantially horizontally from the lower end of the main body portion, and a lower piece portion 12 are provided. Consists of a fastening seat 13. The tightening seat 13 has a bolt hole 131.
また，該マッドガード１は，上記本体部11と下片部12
との当接部に水抜用の開口穴14を２個有する。そして，
上記締付座13は，両開口穴14の間において上記本体部11
から遠い位置，つまり樹脂流れの下流に位置している。In addition, the mudguard 1 includes the main body 11 and the lower piece 12
There are two opening holes 14 for draining water at the contact portion with. And
The tightening seat 13 has the body portion 11 between the opening holes 14.
It is located at a position far from, that is, downstream of the resin flow.
また，該締付座13は，第２図及び第３図に示すごと
く，硬質のコア層３とその表面を包む軟質の表皮層２と
により構成されている。更に，該コア層３は，凸状の締
付座13の周囲を取り巻いている。As shown in FIGS. 2 and 3, the tightening seat 13 is composed of a hard core layer 3 and a soft skin layer 2 surrounding the surface thereof. Further, the core layer 3 surrounds the periphery of the convex tightening seat 13.
第３図は，マッドガードの裏面図を示しており，斜線
部分が，表皮層材料20の内部に存在しているコア層材料
30の様子を示している。FIG. 3 shows the back view of the mudguard, and the shaded area is the core layer material inside the skin layer material 20.
It shows the situation of 30.
次に，上記マッドガード１の製造用の成形型８は，第
４図に示すごとく，締付座13形成用の凸状型面83と，開
口穴14形成用の２個の入子84とを配置している。凸状型
面83は,2個の入子84の間において，かつ上記本体部11か
ら遠い位置である，樹脂流ての下流に位置している。そ
の他は，前記従来技術で示した成形型（第７図，第８
図）と同様である。Next, as shown in FIG. 4, the molding die 8 for manufacturing the mudguard 1 has a convex die surface 83 for forming the tightening seat 13 and two inserts 84 for forming the opening hole 14. It is arranged. The convex mold surface 83 is located between the two nests 84 and at a position far from the main body 11 and downstream of the resin flow. Others are the molding dies shown in the above-mentioned prior art (see FIGS. 7 and 8).
(Fig.).
そして，マッドガード製造に当たっては，従来技術と
同様に，マッドガードの本体部11の方向から，まず表皮
層材料20を射出し，その後該表皮層材料20の中へコア層
材料30を射出する。射出されたコア層材料30は，表皮層
材料20の内部で該表皮層材料20と共に成形型８の立型面
81（第７図，第８図）を垂下していく。そして，該コア
層材料30の一部は，上記入子84,84によって左右に分流
される。In manufacturing the mudguard, the skin layer material 20 is first injected from the direction of the main body portion 11 of the mudguard, and then the core layer material 30 is injected into the skin layer material 20, as in the prior art. The core layer material 30 that has been injected together with the surface layer material 20 inside the surface layer material 20 is a vertical surface of the molding die 8.
81 (Figs. 7 and 8) is suspended. Then, a part of the core layer material 30 is divided into right and left by the nests 84, 84.
しかし，入子84,84の間においては，第４図に示すご
とく、コア層材料30は分流されず，そのまま凸状型面83
に向かって流れる。そのため、凸状型面83の周囲にも完
全にコア層材料30が行き渡る。それ故，凸状型面83の周
囲に形成される締付座13は，前記のごとく，コア層３と
表皮層２とより構成され，剛性も高い。However, as shown in FIG. 4, the core layer material 30 is not shunted between the nests 84, 84, and the convex mold surface 83 remains as it is.
Flowing toward. Therefore, the core layer material 30 is completely spread around the convex mold surface 83. Therefore, the tightening seat 13 formed around the convex mold surface 83 is composed of the core layer 3 and the skin layer 2 as described above, and has high rigidity.
また、締付座13のボルト孔131は，第２図に示すごと
く，その壁面が軟質の表皮層２により被覆されている。Further, the wall surface of the bolt hole 131 of the tightening seat 13 is covered with the soft skin layer 2, as shown in FIG.
また，上記第４図に示した樹脂流れにおいて，入子84
によって分流させられたコア層材料30は，同図に示すご
とく，入子84の下流においては直ぐに合流しない。それ
故，合流するまでの間は，表皮層材料20のみが存在す
る。しかし，この部分には締付座13は存在しないので，
問題ない。In addition, in the resin flow shown in FIG.
The core layer material 30 divided by the flow does not join immediately downstream of the nest 84, as shown in FIG. Therefore, only the skin layer material 20 is present until the merge. However, since there is no tightening seat 13 in this part,
no problem.
また，同図に示すごとく，本例では，入子84が２ケ所
にあるので，両入子84,84の間を下流へ流れてくるコア
層材料30は，下流に行くに従って末広がりとなる。その
ため，下流にある凸状型面83の周囲には，完全にコア層
材料30が到達するのである。Further, as shown in the figure, in this example, since the nests 84 are located at two places, the core layer material 30 flowing downstream between the nests 84, 84 becomes wider toward the downstream side. Therefore, the core layer material 30 completely reaches the periphery of the convex die surface 83 located downstream.
上記のごとく，本例によれば，下片部12に設けられる
締付座13の位置を,2個の開口穴14の間において，かつ上
記本体部11から遠い位置である樹脂流れの下流に配置し
てあるので，開口穴を有すると共に，剛性に優れた締付
座を優するマッドガードを得ることができる。As described above, according to this example, the position of the tightening seat 13 provided on the lower piece portion 12 is located between the two opening holes 14 and downstream of the resin flow, which is a position far from the main body portion 11. Since they are arranged, it is possible to obtain a mudguard which has an opening hole and is superior in rigidity to the tightening seat.
第１図〜第４図は実施例を示し，第１図はマッドガード
の斜視図，第２図は第１図のＡ−Ａ線矢視断面図，第３
図はマッドガードの裏面図，第４図は成形型中における
コア層材料の樹脂流れの説明図，第５図〜第９図は従来
例を示し，第５図は従来のマッドガードの斜視図，第６
図は第５図のＢ−Ｂ線矢視断面図，第７図は成形型の下
型の要部斜視図，第８図は成形型の要部断面図，第９図
はコア層材料の樹脂流れの説明図である。 １……マッドガード， 11……本体部， 13……締付座， 14……開口穴， ２……表面層， 20……表皮層材料， ３……コア層， 30……コア層材料， ８……成形型， 83……凸状型面， 84……入子，1 to 4 show an embodiment, FIG. 1 is a perspective view of a mudguard, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG.
The figure is a back view of the mudguard, FIG. 4 is an explanatory view of the resin flow of the core layer material in the molding die, FIGS. 5 to 9 are conventional examples, and FIG. 5 is a perspective view of the conventional mudguard. 6
FIG. 7 is a sectional view taken along the line BB of FIG. 5, FIG. 7 is a perspective view of an essential part of the lower mold of the mold, FIG. 8 is a sectional view of an essential part of the mold, and FIG. 9 is a core layer material. It is explanatory drawing of a resin flow. 1 ... Mudguard, 11 ... Body, 13 ... Tightening seat, 14 ... Opening hole, 2 ... Surface layer, 20 ... Skin layer material, 3 ... Core layer, 30 ... Core layer material, 8 …… Mold, 83 …… Convex mold surface, 84 …… Nest,
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平１−69081（ＪＰ，Ｕ) 実開 昭57−161582（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Hei 1-69081 (JP, U) Hei 57-161582 (JP, U)
Claims (1)
状に突出して設けた下片部とよりなると共に上記本体部
と下片部との当接部には複数個の開口穴を有し，また上
記下片部にはボルト孔を設けた締付座を有し，かつ上記
本体部側から上記下片部側に向けて表皮層材料とコア層
材料とを順次射出することにより合成した合成樹脂のサ
ンドイッチ成形品であって， 上記締付座は，隣合う上記開口穴の間であって，かつ上
記本体部から遠い位置に設けてあり， また上記締付座は，硬質のコア層とその表面を包む軟質
の表皮層とにより構成され，かつ該締付座におけるボル
ト孔の壁面は軟質の表皮層により被覆されていることを
特徴とするサンドイッチ成形品。1. A vertically extending main body portion and a lower piece portion provided so as to project from the main body portion in a substantially horizontal shape, and a plurality of openings are provided at a contact portion between the main body portion and the lower piece portion. The bottom piece has a fastening seat provided with a bolt hole, and the skin layer material and the core layer material are sequentially injected from the main body side toward the bottom piece side. A synthetic resin sandwich molded article synthesized by the above, wherein the tightening seats are provided between adjacent opening holes and far from the main body, and the tightening seats are: A sandwich molded article comprising a hard core layer and a soft skin layer covering the surface thereof, and the wall surface of the bolt hole in the tightening seat is covered with the soft skin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2067901A JP2557717B2 (en) | 1990-03-16 | 1990-03-16 | Sandwich moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2067901A JP2557717B2 (en) | 1990-03-16 | 1990-03-16 | Sandwich moldings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03266779A JPH03266779A (en) | 1991-11-27 |
| JP2557717B2 true JP2557717B2 (en) | 1996-11-27 |
Family
ID=13358261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2067901A Expired - Fee Related JP2557717B2 (en) | 1990-03-16 | 1990-03-16 | Sandwich moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2557717B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57161582U (en) * | 1981-04-03 | 1982-10-09 | ||
| JPH0169081U (en) * | 1987-10-28 | 1989-05-08 |
-
1990
- 1990-03-16 JP JP2067901A patent/JP2557717B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03266779A (en) | 1991-11-27 |
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