JPH0557747A - Method for molding sandwich molded product - Google Patents
Method for molding sandwich molded productInfo
- Publication number
- JPH0557747A JPH0557747A JP24272191A JP24272191A JPH0557747A JP H0557747 A JPH0557747 A JP H0557747A JP 24272191 A JP24272191 A JP 24272191A JP 24272191 A JP24272191 A JP 24272191A JP H0557747 A JPH0557747 A JP H0557747A
- Authority
- JP
- Japan
- Prior art keywords
- layer material
- skin layer
- core
- mounting portion
- cavity
- 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
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
- B29C2045/0093—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of articles provided with an attaching element
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，自動車用マッドガード
のごとく車体等に取り付けるための取付部を有し，剛性
に優れた，サンドイッチ成形品を成形する方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a sandwich molded article having a mounting portion for mounting on a vehicle body or the like such as a mudguard for automobiles and having excellent rigidity.
【０００２】[0002]
【従来技術】合成樹脂のサンドイッチ成形方法として
は，例えば特開平３−８６５１０号公報に示される技術
がある。この成形方法は，射出ノズルで成形型のキャビ
ティ内に，まずスキン層材料を射出し，更にコア層材料
を射出して，スキン層材料とコア層材料からなるサンド
イッチ合成樹脂成形品を製造する方法である。この方法
を利用すれば，内部に硬いコア層を有し，その表面に軟
らかいスキン層を被覆したサンドイッチ成形品を製造す
ることができる。2. Description of the Related Art As a sandwich molding method of synthetic resin, there is a technology disclosed in, for example, JP-A-3-86510. This molding method is a method in which a skin layer material is first injected into a cavity of a molding die by an injection nozzle, and then a core layer material is further injected to produce a sandwich synthetic resin molded product composed of the skin layer material and the core layer material. Is. By using this method, it is possible to manufacture a sandwich molded article having a hard core layer inside and coating a soft skin layer on the surface thereof.
【０００３】ところで，マッドガードのごとき成形品に
おいては，図４に示すごとく，成形品９の先端部分に取
付部９２を有するものがある。そして，該成形品９は，
その本体９０は勿論のこと，上記取付部９２も硬いコア
層材料３とその表面に被覆した軟らかいスキン層２とか
らなるサンドイッチ構造を有する。上記取付部９２をか
かるサンドイッチ構造とする理由は，取付部９２はその
取付孔９１にボルト（図示略）を挿通して，車体等の相
手物品に取付けるため，強度を高くする必要があるため
である。また，ボルト，ナットを締付けるとき，取付部
９２の表面はある程度の弾力性を有する方が良い。この
弾力性によって，締付け応力が分散され，係止片に無理
な締付力が集中しないからである。それ故，取付部９２
は取付孔９１の先端部近くまでコア層材料が存在し（図
２参照），これらの表面をコア層材料が被覆してあるこ
とが要求されるのである。Some molded products such as mudguards have a mounting portion 92 at the tip of the molded product 9 as shown in FIG. And the molded article 9 is
Not only the main body 90 but also the mounting portion 92 has a sandwich structure composed of a hard core layer material 3 and a soft skin layer 2 coated on the surface thereof. The reason why the mounting portion 92 has such a sandwich structure is that the mounting portion 92 needs to have high strength because it is mounted on a mating article such as a vehicle body by inserting a bolt (not shown) into the mounting hole 91. is there. Further, when tightening the bolts and nuts, the surface of the mounting portion 92 should have some elasticity. This elasticity distributes the tightening stress, and the excessive tightening force is not concentrated on the locking piece. Therefore, the mounting portion 92
The core layer material exists near the tip of the attachment hole 91 (see FIG. 2), and it is required that the core layer material covers these surfaces.
【０００４】[0004]
【解決しようとする課題】しかしながら，前記従来のサ
ンドイッチ成形方法によれば，図５に示すごとく，前記
取付部９２の部分がサンドイッチ構造となり難く，スキ
ン層材料２０のみから形成されてしまう場合がある。即
ち，この取付部９２の部分にコア層材料３が入り込んで
いない。その原因は，サンドイッチ成形の際には，キャ
ビティ内にまず先にスキン層材料を射出し，次いで該ス
キン層材料内にコア層材料を射出するため，上記取付部
９２の部分が先にスキン層材料で充填され，コア層材料
が入り込めないためと考えられる。However, according to the conventional sandwich molding method, as shown in FIG. 5, it is difficult for the attachment portion 92 to have a sandwich structure, and the skin layer material 20 alone may be formed. .. That is, the core layer material 3 has not entered the mounting portion 92. The reason for this is that during sandwich molding, the skin layer material is first injected into the cavity, and then the core layer material is injected into the skin layer material. It is thought that this is because the core layer material cannot be entered because it is filled with the material.
【０００５】即ち，従来のサンドイッチ成形方法におい
ては，上記のごとく取付部の部分を確実にサンドイッチ
構造することが困難である。本発明は，かかる従来の問
題点に鑑み，サンドイッチ成形方法について種々の検討
を重ねた結果なされたもので，取付部の部分をも確実に
サンドイッチ構造とすることができる，剛性に優れた，
サンドイッチ成形品の成形方法を提供しようとするもの
である。That is, in the conventional sandwich molding method, it is difficult to surely sandwich the mounting portion as described above. In view of such conventional problems, the present invention has been made as a result of various studies on a sandwich molding method, and can surely have a sandwich structure even at a mounting portion, and has excellent rigidity.
It is intended to provide a method for molding a sandwich molded article.
【０００６】[0006]
【課題の解決手段】本発明は，コア層とスキン層とから
なり，かつ取付部を有するサンドイッチ成形品を成形す
るに当たり，成形品の形状を有するキャビティ内に，上
記取付部における取付孔を形成するための中子を設ける
と共に，該中子の近傍に複数の小流路を有するタブを設
けた成形型を用い，上記キャビティにスキン層材料を射
出し，該スキン層材料の中にコア層材料を注入すること
を特徴とするサンドイッチ成形品の成形方法にある。According to the present invention, when molding a sandwich molded article having a mounting portion and comprising a core layer and a skin layer, a mounting hole in the mounting portion is formed in a cavity having the shape of the molded article. And a core layer is injected into the skin layer material by injecting a skin layer material into the cavity using a mold having a core provided with a tab having a plurality of small channels in the vicinity of the core layer. A method for molding a sandwich molded article is characterized by injecting a material.
【０００７】本発明において最も注目すべきことは，成
形型のキャビティ内に取付部における取付孔を形成する
ための中子を設けると共に，該中子の近傍に複数の小流
路を有するタブを設けたことにある。上記タブは，キャ
ビティの外側へ突出した状態で設ける（図１参照）。ま
た，上記小流路は，成形型内壁に上記タブに通ずる，ス
キン層材料及びコア層材料の余分な樹脂が流入するため
の流路であり，例えば２〜４個設ける。上記小流路は，
例えば上記中子の中心より左右に，それぞれ３〜１０ｍ
ｍの範囲に設けることが好ましい。これにより，スキン
層材料及びコア層材料が中子の周囲に均一に回り両小流
路を通じて，タブ内へ流入する。What is most noticeable in the present invention is that a core for forming a mounting hole in a mounting portion is provided in a cavity of a molding die, and a tab having a plurality of small flow paths is provided in the vicinity of the core. It is in the provision. The tab is provided so as to project to the outside of the cavity (see Fig. 1). Further, the small flow passages are passages through which the excess resin of the skin layer material and the core layer material, which communicates with the tabs, flow into the inner wall of the molding die, and for example, 2 to 4 are provided. The above small channel is
For example, 3 to 10m to the left and right of the center of the core
It is preferably provided in the range of m. As a result, the skin layer material and the core layer material uniformly flow around the core and flow into the tub through both small channels.
【０００８】また，上記サンドイッチ成形品としては，
取付孔が明けられている取付部を有している，マッドガ
ード，各種モール類等がある。また，上記小流路は，中
子近傍に先に到着しているスキン層材料が，コア層材料
によって押されたとき，上記タブ内に流入するよう設け
る。より具体的には，例えば上記タブの部分を除いて，
キャビティ内がスキン層材料とその内部のコア層材料に
よってほぼ充填されたときに，該中子近傍を通って，ス
キン層材料が上記タブ内に入り始めるようにする。Further, as the above sandwich molded article,
There are mudguards, various moldings, etc. that have a mounting part with a mounting hole. Further, the small channel is provided so that the skin layer material that has arrived near the core first flows into the tab when the skin layer material is pushed by the core layer material. More specifically, except for the tab part above,
When the inside of the cavity is substantially filled with the skin layer material and the core layer material inside the cavity, the skin layer material starts to enter the tab through the vicinity of the core.
【０００９】[0009]
【作用及び効果】本発明においは，まずキャビティ内に
スキン層材料を射出していく。射出されたスキン層材料
はキャビティ内を充填しながら前方に押されていき，取
付部形成部の近くに達する。そして，スキン層材料は，
サンドイッチ成形品に必要な量だけ成形型のキャビティ
内に射出される。このとき，スキン層材料は，例えばキ
ャビティ内に７０％位充填されている。In the present invention, the skin layer material is first injected into the cavity. The injected skin layer material is pushed forward while filling the inside of the cavity, and reaches near the mounting portion forming portion. And the skin layer material is
The quantity required for the sandwich molding is injected into the mold cavity. At this time, the skin layer material is filled in the cavity by about 70%.
【００１０】その後，上記スキン層材料内にコア層材料
を射出する。このコア層材料の射出により，キャビティ
内は，スキン層材料とその内部のコア層材料とによって
完全充填される。その後，更に続けて流入してくるコア
層材料によって前記中子の近傍に滞留していた残りのス
キン層材料が前記複数の小流路を通って上記タブ内に流
入していく。それ故，上記タブ内はこのスキン層材料と
その内部を流入してくるコア層材料によって充填され
る。したがって，本発明によれば，取付部の周縁部をも
確実にサンドイッチ構造とすることができ，剛性に優れ
た，サンドイッチ成形品を製造することができる。Then, the core layer material is injected into the skin layer material. By the injection of the core layer material, the inside of the cavity is completely filled with the skin layer material and the core layer material inside thereof. After that, the remaining skin layer material staying in the vicinity of the core is further flowed into the tab through the plurality of small channels due to the core layer material flowing in continuously. Therefore, the inside of the tub is filled with the skin layer material and the core layer material flowing therein. Therefore, according to the present invention, the peripheral portion of the mounting portion can be surely made to have the sandwich structure, and the sandwich molded article having excellent rigidity can be manufactured.
【００１１】[0011]
実施例１ 本発明の実施例にかかるサンドイッチ成形品の成形方法
につき，図１〜図３を用いて説明する。本例において製
造しようとするサンドイッチ成形品は，図２及び図３に
示す自動車用マッドガード４である。該マッドガード４
は，図３に示すごとく，車体に取付ける本体４１と，取
付孔４１１を有する後方取付部４１０と，これらの下方
に垂設した下片４２とよりなる。上記本体４１は，ボル
ト挿入用の取付孔４１１を，また前方取付部４８には同
様の取付孔４８１を有する。また，上記本体４１と前方
取付部４８との間には，両者で囲まれた凹所４５を有す
る。該凹所４５は，車体の一部を挿入する部分である。Example 1 A method for molding a sandwich molded article according to an example of the present invention will be described with reference to FIGS. The sandwich molded product to be manufactured in this example is the automobile mudguard 4 shown in FIGS. 2 and 3. The mudguard 4
As shown in FIG. 3, it is composed of a main body 41 to be mounted on the vehicle body, a rear mounting portion 410 having a mounting hole 411, and a lower piece 42 hung vertically below them. The main body 41 has a mounting hole 411 for inserting a bolt, and the front mounting portion 48 has a similar mounting hole 481. A recess 45 surrounded by the main body 41 and the front mounting portion 48 is provided. The recess 45 is a portion into which a part of the vehicle body is inserted.
【００１２】また，上記マッドガード４の断面構造は，
図２に示すごとく，本体（図示略）と取付部４１１と
は，スキン層２の中にコア層３が略均一な厚みで内包さ
れているサンドイッチ構造の硬質部分を形成している。
つまり，本体４１と後方取付部４１０とは，硬いコア層
を内包しているので硬質部分となり，下片４２は軟らか
いスキン層材料２０のみからなるので軟質部分となる。
かかる構造としたのは，本体４１と後方取付部４１０と
は，車体に取付固定するため強固であることが要求され
るためである。また，上記前方取付部４８の取付孔４８
１近傍においては，その全周縁部がスキン層材料２０と
コア層材料３０とからなるサンドイッチ構造を呈してい
る。また，該取付孔４８１の内壁はスキン層材料２０に
よって形成されている。The cross-sectional structure of the mudguard 4 is as follows.
As shown in FIG. 2, the main body (not shown) and the mounting portion 411 form a hard portion having a sandwich structure in which the core layer 3 is included in the skin layer 2 with a substantially uniform thickness.
That is, the main body 41 and the rear mounting portion 410 are hard portions because they include a hard core layer, and the lower piece 42 is a soft portion because it is made of only the soft skin layer material 20.
The reason why this structure is adopted is that the main body 41 and the rear mounting portion 410 are required to be strong so as to be mounted and fixed to the vehicle body. In addition, the mounting hole 48 of the front mounting portion 48
In the vicinity of 1, the entire peripheral portion has a sandwich structure composed of the skin layer material 20 and the core layer material 30. The inner wall of the mounting hole 481 is formed of the skin layer material 20.
【００１３】次に，上記マッドガード４の成形方法につ
き説明する。まず，この成形方法に用いる成形型１は，
図１に示すごとく，その中央部分が，マッドガード成形
用のキャビティ５０を構成する。該キャビティ５０は，
本体形成部（図示略）の先端部に取付孔形成用の中子５
４を有する。そして，上記成形型５は，同図に示すごと
く，上記取付部形成部の先端部，つまり上記中子５４の
近傍に，上記キャビティ５０の外側へ突出した状態で２
個の小流路５１，５２を有する。また，上記小流路５
１，５２の先端部には，余分の樹脂が流入するためのタ
ブ５３を有する。なお，上記取付孔４１１以外の取付穴
４１２，４８１を形成するための中子及びその近傍に設
ける小流路及びタブについては，省略する。Next, a method of forming the mudguard 4 will be described. First, the mold 1 used in this molding method is
As shown in FIG. 1, the central portion thereof forms a cavity 50 for mudguard molding. The cavity 50 is
A core 5 for forming a mounting hole at the tip of the main body forming portion (not shown)
Have four. Then, as shown in the figure, the molding die 5 is located at the tip of the mounting portion forming portion, that is, in the vicinity of the core 54, in a state of protruding outside the cavity 50.
It has individual small flow paths 51, 52. In addition, the small channel 5
A tab 53 for allowing excess resin to flow in is provided at the tip portions of 1, 52. The cores for forming the mounting holes 412 and 481 other than the mounting holes 411 and the small passages and tabs provided in the vicinity thereof are omitted.
【００１４】上記小流路５１，５２は，図１に示すごと
く，中子５４の中心５４１より左右に，それぞれ３〜１
０ｍｍの範囲Ｍに設ける。これにより，スキン層材料２
０及びコア層材料３０は，両小流路５１，５２を通じて
均等に，タブ５３内へ流入する。また，成形型５は，本
体形成部に開口するゲート（図示略）を有する。該ゲー
トは，スキン層材料注入用の射出成形機，及びコア層材
料注入用の射出成形機（図示略）に連結されている。As shown in FIG. 1, the small flow paths 51 and 52 are respectively 3 to 1 to the left and right of the center 541 of the core 54.
It is provided in the range M of 0 mm. As a result, the skin layer material 2
0 and the core layer material 30 evenly flow into the tab 53 through both the small flow paths 51 and 52. Further, the molding die 5 has a gate (not shown) that opens to the main body forming portion. The gate is connected to an injection molding machine for injecting the skin layer material and an injection molding machine (not shown) for injecting the core layer material.
【００１５】次に，射出成形方法につき説明する。ま
ず，最初は，図１に示すごとく，キャビティ５０内に，
ゲート（図示略）よりスキン層材料２０を射出する。こ
のスキン層材料２０の射出量は，前記下片４２の全容積
と，本体４１及び後方取付部４１０のスキン層３の容積
の合計容量に相当する。そして，この射出時において
は，スキン層材料２０は本体形成部内を前方へ押されて
いく。このとき，キャビティー壁に接触した部分のスキ
ン層材料２０は，固化しスキン層を形成する。そして，
スキン層材料２０は，取付部形成部と下片との両方に流
入していく。Next, the injection molding method will be described. First, as shown in FIG. 1, first, in the cavity 50,
The skin layer material 20 is injected from a gate (not shown). The injection amount of the skin layer material 20 corresponds to the total volume of the total volume of the lower piece 42 and the volume of the skin layer 3 of the main body 41 and the rear mounting portion 410. Then, at the time of this injection, the skin layer material 20 is pushed forward in the main body forming portion. At this time, the skin layer material 20 in contact with the cavity wall is solidified to form a skin layer. And
The skin layer material 20 flows into both the mounting portion forming portion and the lower piece.
【００１６】そして，上記のごとく，所定量のスキン層
材料２０が射出された後，該スキン層材料２０内に図１
に示すごとく，コア層材料３０が射出される。そのた
め，上記スキン層材料２０は更に前方に押されていく。
そして，上記スキン層材料２０は，先ず上記２個の小流
路５１，５２内に入り，更に続くコア層材料３０の注入
により，上記スキン層材料２０は上記タブ５３内に押し
込まれていく。As described above, after a predetermined amount of the skin layer material 20 has been injected, the skin layer material 20 is injected into the skin layer material 20 as shown in FIG.
As shown in, the core layer material 30 is injected. Therefore, the skin layer material 20 is pushed further forward.
Then, the skin layer material 20 first enters the two small channels 51 and 52, and the skin layer material 20 is pushed into the tab 53 by further injecting the core layer material 30.
【００１７】そして，更に，続くコア層材料３０の注入
により，同図に示すごとく，コア層材料３０も上記小流
路５１，５２を略均一に通って，上記タブ５３内に入
る。このとき，上記中子５４の回りには，まずスキン層
材料２０が到達するので，スキン層材料２０によるスキ
ン層２が形成され，成形品における取付孔４１１の壁が
スキン層材料２０により形成されることとなる。そのた
め，後方取付部４１０における取付孔４１１の全周縁部
は，剛性に優れることになる。Then, by further injecting the core layer material 30, as shown in the figure, the core layer material 30 also passes through the small channels 51 and 52 substantially uniformly and enters the tab 53. At this time, since the skin layer material 20 first reaches around the core 54, the skin layer 2 is formed by the skin layer material 20, and the wall of the mounting hole 411 in the molded product is formed by the skin layer material 20. The Rukoto. Therefore, the entire peripheral edge portion of the mounting hole 411 in the rear mounting portion 410 has excellent rigidity.
【００１８】その後は，全体を冷却，固化させ，成形型
１より成形品を取り出す。該成形品は，前記図２，図３
に示したマッドガード４である。また，該マッドガード
４の後方取付部４１０には，図１に示すごとく，前記成
形型１の小流路５１，５２及びタブ５３によって形成さ
れた，２つの小流路品４１４及びタブ品４１３を有して
いる。そして，これらは，上記小流路品４１５の付け根
部で切断除去する。上記のごとく，本例の成形方法によ
れば，本体４１，後方取付部４１０，前方取付部４８
が，コア層材料３０をスキン層材料２０で均一に被覆さ
れたサンドイッチ構造を有し，剛性に優れた，マッドガ
ード４を容易に製造することができる。After that, the whole is cooled and solidified, and the molded product is taken out from the molding die 1. The molded product is as shown in FIG.
The mudguard 4 shown in FIG. Further, as shown in FIG. 1, the rear mounting portion 410 of the mudguard 4 is provided with two small flow passage products 414 and a tab product 413 formed by the small flow passages 51 and 52 and the tab 53 of the molding die 1. Have Then, these are cut and removed at the base portion of the small flow path product 415. As described above, according to the molding method of this example, the main body 41, the rear mounting portion 410, and the front mounting portion 48.
However, the mudguard 4 having a sandwich structure in which the core layer material 30 is uniformly covered with the skin layer material 20 and having excellent rigidity can be easily manufactured.
【図１】実施例における，キャビティ内の樹脂材料の流
れを示す説明図。FIG. 1 is an explanatory view showing a flow of a resin material in a cavity in an example.
【図２】図３のＡ−Ａ線矢視断面図。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】実施例において製造されたマッドガードの斜視
図。FIG. 3 is a perspective view of the mudguard manufactured in the embodiment.
【図４】従来例における，取付部を有する成形品の一部
切欠斜視図。FIG. 4 is a partially cutaway perspective view of a molded product having a mounting portion in a conventional example.
【図５】図４のＢ−Ｂ線矢視断面図。5 is a sectional view taken along the line BB of FIG.
２．．．スキン層，２０．．．スキン層材料，３．．．
コア層，３０．．．コア層材料，４．．．マッドガー
ド，４１０．．．後方取付部，４１１．．．取付孔，
５．．．成形型，５０．．．キャビティ，５１，５
２．．．小流路，５３．．．タブ，2. ． ． Skin layer, 20. ． ． Skin layer material, 3. ． ．
Core layer, 30. ． ． Core layer material, 4. ． ． Mudguard, 410. ． ． Rear mounting portion, 411. ． ． Mounting hole,
5. ． ． Mold, 50. ． ． Cavity, 51, 5
2. ． ． Small channel, 53. ． ． tab,
Claims (1)
部を有するサンドイッチ成形品を成形するに当たり，成
形品の形状を有するキャビティ内に，上記取付部におけ
る取付孔を形成するための中子を設けると共に，該中子
の近傍に複数の小流路を有するタブを設けた成形型を用
い，上記キャビティにスキン層材料を射出し，該スキン
層材料の中にコア層材料を注入することを特徴とするサ
ンドイッチ成形品の成形方法。1. A core for forming a mounting hole in the above-mentioned mounting portion in a cavity having a shape of the molded product when molding a sandwich molded product comprising a core layer and a skin layer and having a mounting portion. And using a molding die having a tab having a plurality of small flow paths in the vicinity of the core, injecting the skin layer material into the cavity, and injecting the core layer material into the skin layer material. A method for forming a sandwich molded article, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3242721A JP2518477B2 (en) | 1991-08-28 | 1991-08-28 | Sandwich molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3242721A JP2518477B2 (en) | 1991-08-28 | 1991-08-28 | Sandwich molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0557747A true JPH0557747A (en) | 1993-03-09 |
| JP2518477B2 JP2518477B2 (en) | 1996-07-24 |
Family
ID=17093261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3242721A Expired - Fee Related JP2518477B2 (en) | 1991-08-28 | 1991-08-28 | Sandwich molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518477B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5091467A (en) * | 1991-03-29 | 1992-02-25 | The Goodyear Tire & Rubber Company | Controlled morphology barrier elastomers made from blends of syndiotactic 1,2-polybutadiene and ethylene-vinyl acetate-vinyl alcohol terpolymers |
| JP2017507822A (en) * | 2014-01-24 | 2017-03-23 | ミラクロン エルエルシー | Co-injection molded multilayer products with injection molding holes between the gate area and the periphery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132623A (en) * | 1985-12-04 | 1987-06-15 | Ichikoh Ind Ltd | Sandwich molding method |
-
1991
- 1991-08-28 JP JP3242721A patent/JP2518477B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132623A (en) * | 1985-12-04 | 1987-06-15 | Ichikoh Ind Ltd | Sandwich molding method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5091467A (en) * | 1991-03-29 | 1992-02-25 | The Goodyear Tire & Rubber Company | Controlled morphology barrier elastomers made from blends of syndiotactic 1,2-polybutadiene and ethylene-vinyl acetate-vinyl alcohol terpolymers |
| JP2017507822A (en) * | 2014-01-24 | 2017-03-23 | ミラクロン エルエルシー | Co-injection molded multilayer products with injection molding holes between the gate area and the periphery |
| US10759101B2 (en) | 2014-01-24 | 2020-09-01 | Milacron Llc | Co-injection molded multi-layer article with injection-formed aperture between gate area and peripheral edge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2518477B2 (en) | 1996-07-24 |
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