JPH01146924U

JPH01146924U -

Info

Publication number: JPH01146924U
Application number: JP4373488U
Authority: JP
Priority date: 1988-03-31
Filing date: 1988-03-31
Publication date: 1989-10-11
Anticipated expiration: 2003-03-31
Also published as: JPH065859Y2

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図〜第３図は本考案の一実施例を示すもの
であつて、第１図は射出成形装置全体の断面図、
第２図は自動車用バンパの射出成形時の拡大断面
図、第３図は自動車用バンパの離型時の拡大断面
図、第４図および第５図は従来の射出成形装置を
示すものであつて、第４図は自動車用バンパの射
出成形時の拡大断面図、第５図は自動車用バンパ
の離型時の拡大断面図である。１……射出成形装置、２……自動車用バンパ、
３……上型、４……下型、５……金型本体、６…
…アンダーカツト処理機構、１０……アンダーカ
ツト部、１１……取付ボス、１２……屈曲部、１
３……内部コア、１４……外部コア、１５……傾
斜スライドブロツク、１７……第１エジエクタピ
ン、１８……傾斜エジエクタピン、２０……駆動
装置、２１，２２……凹部、２５，２６……摺動
面、３０……エジエクタプレート、３１……エジ
エクタロツド、３２……シリンダ、３３……案内
溝、３４……スライドプレート。 1 to 3 show an embodiment of the present invention, in which FIG. 1 is a sectional view of the entire injection molding apparatus;
Fig. 2 is an enlarged sectional view of an automobile bumper during injection molding, Fig. 3 is an enlarged sectional view of an automobile bumper during mold release, and Figs. 4 and 5 show a conventional injection molding apparatus. FIG. 4 is an enlarged sectional view of the automobile bumper during injection molding, and FIG. 5 is an enlarged sectional view of the automobile bumper when it is released from the mold. 1... Injection molding device, 2... Automobile bumper,
3... Upper mold, 4... Lower mold, 5... Mold body, 6...
... Undercut processing mechanism, 10... Undercut part, 11... Mounting boss, 12... Bent part, 1
3... Internal core, 14... Outer core, 15... Inclined slide block, 17... First ejector pin, 18... Inclined ejector pin, 20... Drive device, 21, 22... Recess, 25, 26... Sliding surface, 30... Ejector plate, 31... Ejector rod, 32... Cylinder, 33... Guide groove, 34... Slide plate.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

アンダーカツト部および取付用の突起部を有す
る樹脂製品を成形する射出成形装置において、前
記アンダーカツト部の成形部を金型本体とは別体
で型開き方向に対して前後に配置した一対の内外
部コアと傾斜スライドブロツクとにより形成し、
前記外部コアに前記突起部の成形部を設け、前記
内部コアを前記外部コアに型開き方向へ摺動可能
に接続し、前記傾斜スライドブロツクを型開き方
向へ向かうに従つてアンダーカツト部から離れる
ように傾斜させた摺動面にて前記金型本体に摺動
可能に接続するとともに、前記アンダーカツト部
へ向つて型開き方向と反対側に傾斜させた摺動面
にて前記外部コアに摺動自在に接続する一方、前
記金型本体内にエジエクタピンおよび傾斜エジエ
クタピンを挿通配置し、前記エジエクタピンの先
端を前記内部コアに取付けるとともに、前記傾斜
エジエクタピンの先端を前記傾斜スライドブロツ
クに取付け、前記金型本体から樹脂製品を離型す
るとき、前記傾斜エジエクタピンにて前記傾斜ス
ライドブロツクおよび外部コアを型開き方向へ移
動させるとともに、前記傾斜スライドブロツクを
前記金型本体および外部コアに対して摺動させて
前記アンダーカツト部から離脱させ、かつ前記エ
ジエクタピンにて前記内部コアを型開き方向へ移
動させて前記突起部を前記外部コアから同方向へ
押上げるように構成したことを特徴とする射出成
形装置。 In an injection molding apparatus for molding a resin product having an undercut part and a protrusion for attachment, the molding part of the undercut part is separate from the mold body and is arranged in a pair of inner parts arranged in front and behind with respect to the mold opening direction. Formed by an external core and an inclined slide block,
The outer core is provided with a molding portion of the protrusion, the inner core is slidably connected to the outer core in the mold opening direction, and the inclined slide block is moved away from the undercut portion as it moves in the mold opening direction. It is slidably connected to the mold body with a sliding surface inclined as shown in FIG. While movably connected, an ejector pin and an inclined ejector pin are inserted and arranged in the mold body, the tip of the ejector pin is attached to the inner core, and the tip of the inclined ejector pin is attached to the inclined slide block, and the die When releasing the resin product from the mold body, the tilted ejector pin moves the tilted slide block and the outer core in the mold opening direction, and the tilted slide block is slid against the mold body and the outer core. An injection molding apparatus characterized in that the inner core is separated from the undercut portion, and the ejector pin moves the inner core in a mold opening direction to push the protrusion upward from the outer core in the same direction.