JPH082556B2 - Hollow body manufacturing method and mold thereof - Google Patents
Hollow body manufacturing method and mold thereofInfo
- Publication number
- JPH082556B2 JPH082556B2 JP24564891A JP24564891A JPH082556B2 JP H082556 B2 JPH082556 B2 JP H082556B2 JP 24564891 A JP24564891 A JP 24564891A JP 24564891 A JP24564891 A JP 24564891A JP H082556 B2 JPH082556 B2 JP H082556B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- die
- side member
- slide
- back side
- 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
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)
Description
【0001】[0001]
【産業上の利用分野】この発明は、製品を2分割した半
割体周縁の衝合部を2次射出によって接合してプラスチ
ック製中空体を製造する方法及びその型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a plastic hollow body by joining the abutting portions of the peripheral edges of a half-divided body obtained by dividing a product into two parts, and a mold thereof.
【0002】[0002]
【従来の技術】プラスチック製の中空製品、例えば自動
車用のスポイラーやコンソールリッド、グローブリッド
を製造する場合、製品を上下に2つ割りにした半割体を
各々1次射出成形し、成形型をスライドさせて両半割体
を衝合わせ、該衝合部を溶融樹脂の2次射出によって接
合するダイスライドインジェクション法が提案されてい
る(例えば、特開昭62−87315号公報参照)。2. Description of the Related Art When manufacturing hollow plastic products such as spoilers, console lids, and glove lids for automobiles, a half-molded product obtained by splitting the product into upper and lower parts is subjected to primary injection molding to form a molding die. A die slide injection method has been proposed in which both halves are slid against each other and the abutting portions are joined by secondary injection of a molten resin (see, for example, JP-A-62-87315).
【0003】一般に射出成形法はブロー成形法に比して
生産性が高く、しかも外観性の良い成形品が得られるこ
とから、上述の1次成形体の成形と両者の接合とを成形
型のスライドと射出成形法とによって行うことにより、
軽量でかつ外観性の良好な中空製品を効率良く生産する
ことができる。In general, the injection molding method has a higher productivity than the blow molding method, and a molded product having a good appearance can be obtained. Therefore, the molding of the above-mentioned primary molded body and the joining of the two are performed by a molding die. By performing by slide and injection molding method,
It is possible to efficiently produce a hollow product that is lightweight and has good appearance.
【0004】[0004]
【発明が解決しようとする課題】しかるに、上記従来の
プラスチック製中空体の製造方法では、両半割体を型内
で衝合わせ、衝合部分の外周を2次射出で接合するよう
にしていたので、半割体衝合の際に相互に正確に位置決
めされていないと、製品の接合部にバリが生じることが
あり、特に製品の外観重視の面に接合部バリが生じると
好ましくない。However, in the above-mentioned conventional method for manufacturing a plastic hollow body, both halves are butted against each other in the mold, and the outer circumference of the butted portion is joined by the secondary injection. Therefore, if the halves are not accurately positioned with respect to each other, burrs may occur at the joints of the product, and it is not preferable that the burrs at the joints particularly give importance to the appearance of the product.
【0005】そのため、後工程において、グラインダ
等、機械的方法で接合部バリを除去するようにすると、
多大な手間と労力とを必要とするばかりでなく、バリを
除去した後の仕上げ作業が難しく、外観性が損なわれや
すいという問題が生じる。Therefore, in the subsequent step, if the joining portion burr is removed by a mechanical method such as a grinder,
Not only a great deal of labor and labor is required, but also the finishing work after removing the burrs is difficult and the appearance is likely to be impaired.
【0006】この発明は、かかる問題点に鑑み、製品半
割体を2次射出によって接合するに際し、接合部バリが
外観重視の面に生じるのを確実に防止できるようにした
中空体の製造方法及びその型を提供することを課題とす
る。In view of the above problems, the present invention is a method for manufacturing a hollow body, which is capable of reliably preventing a burr at a joint portion from occurring on a surface of which importance is placed on the appearance when the product halves are joined by secondary injection. And to provide its type.
【0007】[0007]
【課題を解決するための手段】そこで本発明に係る中空
体の製造方法は、「外観を重視すべき表側部材と、比較
的外観を軽視できる裏側部材とを重ね合わせてダイスラ
イドインジェクション法にて中空体を成形する方法にお
いて、2次射出のための型合せ時に裏側部材を押さえる
型の裏側部材外周部に斜面を形成し、型締めにより上記
斜面によって表側部材の外周壁を雌型に向って押し付け
つつ2次射出を行うようにした」ことを要旨とする。Therefore, a method of manufacturing a hollow body according to the present invention is "a die slide injection method in which a front side member whose appearance is important and a back side member whose appearance is relatively negligible are superposed. In the method of molding a hollow body, a slope is formed on the outer peripheral portion of the back member of the mold that holds the back member at the time of mold matching for secondary injection, and the mold is clamped to direct the outer peripheral wall of the front member toward the female mold. The main idea is to carry out the secondary injection while pressing it.
【0008】また、本発明に係る中空体の成形型は、
「外観を重視すべき表側部材と、比較的外観を軽視でき
る裏側部材とを重ね合わせてダイスライドインジェクシ
ョン法にて中空体を成形する型において、中空体の型開
き投影方向の最大輪郭部よりも裏側部材側に型割面が形
成され、2次射出のための型合せ時に裏側部材を押さえ
る型の裏側部材外周部には斜面が形成され、2次射出時
の型締めによって上記斜面が表側部材の外周壁を雌型に
向って押し付けるようにした」ことを要旨とする。The hollow body forming die according to the present invention is
"In a mold that molds a hollow body by die slide injection method by superimposing a front side member that should emphasize appearance and a back side member that can be comparatively neglected, the maximum contour part in the mold opening projection direction of the hollow body A mold splitting surface is formed on the back side member side, and a slope is formed on the outer peripheral portion of the back side member of the mold that holds the back side member at the time of matching for the secondary injection, and the slope is formed by the mold clamping during the secondary injection. The outer peripheral wall of was pressed against the female mold. "
【0009】[0009]
【作用】本発明においては、裏側部材を押さえる型に斜
面を形成し、2次型締め時に上記斜面によって表側部材
の外周壁をその雌型に向って押し付けつつ2次射出する
ようにしたことから、2次射出時に表側部材がその雌型
内面に隙間なく密着され、接合用樹脂が外観を重視すべ
き表側部材側に回り込むことはなく、表側部材には接合
部バリは発生しない。In the present invention, the mold for holding the back member is formed with a slope, and the secondary injection is performed while pressing the outer peripheral wall of the front member toward the female mold by the slope when the secondary mold is clamped. At the time of the secondary injection, the front side member is closely adhered to the inner surface of the female mold without a gap, the joining resin does not go around to the side of the front side member where appearance should be emphasized, and the front side member has no burr at the joint portion.
【0010】また、本発明においては、裏側部材を押さ
える型の裏側部材外周部に斜面を形成し、2次射出時に
表側部材を雌型に押し付けるようにしたことから、表側
部材の樹脂収縮が大きい場合にも斜面の修正によって表
側部材と裏側部材とが正確に接合され、樹脂収縮分の型
修正を容易に行うことができる。Further, in the present invention, since the outer peripheral surface of the back side member of the mold for pressing the back side member is formed with the inclined surface and the front side member is pressed against the female mold during the secondary injection, the resin shrinkage of the front side member is large. Also in this case, the front side member and the back side member are accurately joined by the correction of the slope, and the mold for the resin shrinkage can be easily corrected.
【0011】[0011]
【実施例】以下、本発明を図面に示す具体例に基づいて
詳細に説明する。図1ないし図7は本発明の一実施例に
よる中空体の製造方法及びその型を示し、これは自動車
用スポイラーの成形に適用した例である。図において、
本法が適用される成形型1は固定型2及び可動型3間に
スライド型4を配設して構成され、上記可動型3は図示
の左右方向に開閉可能に、上記スライド型4は図示の上
下方向にスライド可能に設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the specific examples shown in the drawings. 1 to 7 show a method of manufacturing a hollow body and a mold thereof according to an embodiment of the present invention, which is an example applied to molding an automobile spoiler. In the figure,
The molding die 1 to which the present method is applied is configured by disposing a slide die 4 between a fixed die 2 and a movable die 3, and the movable die 3 can be opened and closed in the lateral direction shown in the drawing, and the slide die 4 is shown in the drawing. It is provided so as to be slidable in the vertical direction.
【0012】上記固定型2にはスプルー20及びホット
ランナ21が形成され、該ホットランナ21の外周には
ヒータ等の加熱手段(図示せず)が配設され、又ホット
ランナ21の外端側にはこれを開閉する開閉弁23が介
設されている。また、スライド型4には1次射出用スプ
ルー40、41及び2次射出用スプルー42が固定型2
のホットランナ21に連通しうるように穿設され、該ス
プルー40、41、42の先端はスライド型4の型割面
に開口されている。A sprue 20 and a hot runner 21 are formed on the stationary die 2, a heating means (not shown) such as a heater is arranged on the outer periphery of the hot runner 21, and the outer end side of the hot runner 21 is provided. An on-off valve 23 that opens and closes the valve is installed in the. Further, the slide mold 4 is provided with the primary injection sprues 40 and 41 and the secondary injection sprue 42.
The sprue 40, 41, 42 is opened at the mold split surface of the slide mold 4 so as to communicate with the hot runner 21.
【0013】また、可動型3の型割面には中空製品であ
るスポイラー5を上下に二分割したときの上半割体6の
外面を成形する雌型部30、及び下半割体7の内面を成
形する雄型部31が形成され、上記雌型部30の外周部
には段部が形成され、該段部にはスポイラー5の断面円
弧状側面、即ちアンダーカット部を成形するための部分
スライド型32が型割面外方に向けてスライド可能に設
けられている。他方、スライド型4の型割面にはスポイ
ラー5の下半割体7の外面を成形する雌型部43、及び
上半割体6の内面を成形する雄型部44が形成され、該
雌雄の型部43、44は可動型3側の雄雌の型部31、
30と型合わせされて上下の分割体形状のキャビティを
構成するようになっている。Further, on the mold-splitting surface of the movable mold 3, the female mold portion 30 for molding the outer surface of the upper half-split body 6 and the lower half-split body 7 when the spoiler 5 which is a hollow product is vertically divided into two parts. A male part 31 for molding the inner surface is formed, and a step part is formed on the outer peripheral part of the female part 30, and a stepped part for forming an arcuate cross-section side surface of the spoiler 5, that is, an undercut part. The partial slide mold 32 is provided so as to be slidable toward the outside of the mold dividing surface. On the other hand, a female mold part 43 for molding the outer surface of the lower half-split body 7 of the spoiler 5 and a male mold part 44 for molding the inner surface of the upper half-split body 6 are formed on the mold split surface of the slide mold 4. The mold parts 43 and 44 of the male and female mold parts 31 on the movable mold 3 side are
It is adapted to form the upper and lower divided body cavities by being matched with 30.
【0014】ここで可動型3及びスライド型4はスポイ
ラー5の型開き方向投影の最大輪郭部bよりも下半割体
7側に型割面aに設定されている(図8参照)。また、
部分スライド型32の内周端には斜面320が、スライ
ド型4の雄型部44の外周には上半割体6の外側壁62
下端部を傾斜面に成形する斜面440が形成され、又ス
ライド型4の雌型部43の外周には2次型締め時に上半
部6の外側壁62傾斜面を押圧して外側壁62を可動型
3の雌型部30に押し付ける斜面430が、可動型3の
雄型部31には斜面430が嵌合しうる凹部310が形
成されており、こうして2次型締めによってスライド型
4の雌型部43外周の斜面430が上半割体6の外周壁
62を可動型3の雌型30に向って押し付けつつ2次射
出が行われるようになっている。Here, the movable mold 3 and the slide mold 4 are set on the mold dividing surface a on the lower half-divided body 7 side of the maximum contour portion b of the spoiler 5 projected in the mold opening direction (see FIG. 8). Also,
An inclined surface 320 is formed at the inner peripheral end of the partial slide die 32, and an outer wall 62 of the upper half-split body 6 is formed at the outer periphery of the male die portion 44 of the slide die 4.
An inclined surface 440 is formed to shape the lower end portion into an inclined surface, and the outer wall 62 is pressed against the outer wall 62 of the upper half portion 6 on the outer periphery of the female mold portion 43 of the slide mold 4 during the secondary mold clamping. An inclined surface 430 to be pressed against the female die portion 30 of the movable die 3 and a concave portion 310 to which the inclined surface 430 can be fitted are formed in the male die portion 31 of the movable die 3, and thus the female die 30 of the slide die 4 is subjected to the secondary die clamping. Secondary injection is performed while the inclined surface 430 on the outer periphery of the die part 43 presses the outer peripheral wall 62 of the upper half-divided body 6 toward the female die 30 of the movable die 3.
【0015】また、成形型1には部分スライド型32を
1次射出成形時には非スライド位置に保持し、2次射出
成形時には成形品を突き出すスライド位置にスライドさ
せるスライド機構9が設けられている。このスライド機
構9において、スライド型4には1次及び2次の射出成
形時において部分スライド型32を非スライド位置に保
持するカム90、91、92が形成され、可動型3には
部分スライド型32の背後にカム90、91、92が嵌
合されるカム溝93、94が形成され、又可動型3の図
示上端部には1次射出成形時においてカム部47を収容
する収容凹部95が形成されている。また、上記カム溝
93、94内には1次型開き時において部分スライド型
32を非スライド位置に付勢するばね部材96が配設さ
れ、さらに上記部分スライド型32にはこれをスライド
位置にスライドさせる操作レバー97が設けられ、スラ
イド型4の上端には2次型開き時に上記操作レバー97
と係合してこれを作動させるフック部材98が設けられ
ている。なお、部分スライド型32は操作レバー97の
作動によって各々がスライド位置にスライドするよう
に、カム機構又はレバー機構等によって相互に連携され
ている。なお、カム式のスライド機構9ではなく、油圧
シリンダ式のスライド機構を採用することもできる。Further, the molding die 1 is provided with a slide mechanism 9 for holding the partial slide die 32 in the non-sliding position during the primary injection molding and sliding it into the sliding position where the molded product is projected during the secondary injection molding. In this slide mechanism 9, cams 90, 91 and 92 for holding the partial slide die 32 in the non-sliding position at the time of primary and secondary injection molding are formed in the slide die 4, and the movable die 3 is provided with the partial slide die. Cam grooves 93, 94 into which cams 90, 91, 92 are fitted are formed behind 32, and an accommodating recess 95 for accommodating the cam part 47 at the time of primary injection molding is formed at the upper end of the movable die 3 in the figure. Has been formed. Further, a spring member 96 for urging the partial slide die 32 to the non-sliding position when the primary die is opened is disposed in the cam grooves 93 and 94, and the partial slide die 32 is moved to the slide position. An operation lever 97 for sliding is provided, and the operation lever 97 is provided at the upper end of the slide mold 4 when the secondary mold is opened.
A hook member 98 is provided which engages with and operates the. The partial slide dies 32 are interlocked with each other by a cam mechanism or a lever mechanism so that each of them slides to the slide position by the operation of the operation lever 97. Note that instead of the cam type slide mechanism 9, a hydraulic cylinder type slide mechanism may be adopted.
【0016】また、図8及び図9は本法で製造されたプ
ラスチック製中空製品である自動車用スポイラーを示
す。図において、スポイラー5は上下に2分割して形成
された上半割体6と下半割体7とを接合用樹脂8によっ
て相互に接合して構成され、上半割体6が外観を重視す
べき表側部材と、下半割体7が比較的外観を軽視できる
裏側部材となっている。上記上半割体6内面の外縁側及
び中央には下半割体7を型締方向及びこれと直角な方向
とに位置決めする位置決め用突起60、61が形成さ
れ、又下半割体7内面の中央には上半割体6の中央突起
61と係合する脚部71が形成されている。また、上半
割体6の外側壁62の内面及び下半割体7の外側壁72
の外面はほぼ型抜き方向に平行に形成され、両面によっ
て形成された間隙の中に接合用樹脂8が注入されて固化
されている。また、スポイラー5には支持脚73が形成
され、該支持脚73底面にはこれを車体に固定するため
のナット74が嵌入されている。Further, FIGS. 8 and 9 show an automobile spoiler which is a plastic hollow product manufactured by this method. In the figure, the spoiler 5 is configured by joining an upper half-divided body 6 and a lower half-divided body 7 which are formed by dividing the upper and lower halves with each other with a joining resin 8, and the upper half-divided body 6 emphasizes the appearance. The front side member and the lower half-divided body 7 are the back side member whose appearance can be comparatively neglected. Positioning projections 60 and 61 for positioning the lower half-divided body 7 in the mold clamping direction and in a direction perpendicular to this are formed on the outer edge side and the center of the inner surface of the upper half-divided body 6, and the inner surface of the lower half-divided body 7 is formed. A leg portion 71 that engages with the central protrusion 61 of the upper half-divided body 6 is formed at the center of the. In addition, the inner surface of the outer wall 62 of the upper half-split body 6 and the outer wall 72 of the lower half-split body 7
The outer surface of is formed substantially parallel to the die cutting direction, and the bonding resin 8 is injected and solidified in the gap formed by both surfaces. Support legs 73 are formed on the spoiler 5, and nuts 74 for fixing the support legs 73 to the vehicle body are fitted on the bottom surfaces of the support legs 73.
【0017】次に本実施例のスポイラー製造方法につい
て説明する。Next, a method for manufacturing the spoiler of this embodiment will be described.
【0018】スポイラー5を成形する場合、まず図1に
示すように、スライド型4を第1の型締位置に設定し、
可動型3を前進させて1次型合わせをし、可動型3及び
スライド型4の雌雄の型部30、44によってスポイラ
ー5を2つ割りにした上半割体6形状のキャビティを、
雄雌の型部31、43によってスポイラー5の下半割体
7形状のキャビティを構成する。その状態で射出ノズル
を固定型2のスプル−20に連結させて溶融樹脂を1次
射出すると、溶融樹脂がスプルー20、ホットランナ2
1及び1次射出用スプルー40を経て上半割体側のキャ
ビティに、又スプルー20、ホットランナ21及び1次
射出用スプルー41を経て下半割体側のキャビティに注
入されて上下の半割体6、7が1次成形される。When molding the spoiler 5, first, as shown in FIG. 1, the slide mold 4 is set to the first mold clamping position,
The movable mold 3 is moved forward to perform the primary mold matching, and the cavity of the upper half-divided body 6 shape in which the spoiler 5 is divided into two by the male and female mold parts 30 and 44 of the movable mold 3 and the slide mold 4,
The male and female mold parts 31 and 43 form a lower half-shaped body 7 shaped cavity of the spoiler 5. In that state, when the injection nozzle is connected to the sprue-20 of the fixed mold 2 and the molten resin is primary-injected, the molten resin is sprue 20, hot runner 2
The upper and lower halves 6 are injected through the first and primary injection sprues 40 into the cavity on the upper half-divided body side, and through the sprue 20, the hot runner 21 and the primary injection sprue 41 into the cavity on the lower half-divided body side. , 7 are primarily molded.
【0019】その際、スライド型4側のカム90、91
が可動型3側のカム溝93、94に嵌入されて部分スラ
イド型32が可動型3の雌型部30に対して非スライド
位置に位置決めされていることから、図5に示すよう
に、スライド型4の斜面440が部分スライド型32の
内周端の斜面320と密着し、上半割体6の外側壁62
下端部は傾斜面に成形される。なお、図6に示すよう
に、スライド型4の斜面430が可動型3の凹部310
内に嵌入されるので、スライド型4の斜面430が型合
わせの障害となることはない。At this time, the cams 90 and 91 on the slide die 4 side
Is fitted into the cam grooves 93, 94 on the movable die 3 side, and the partial slide die 32 is positioned at the non-sliding position with respect to the female die portion 30 of the movable die 3. Therefore, as shown in FIG. The sloped surface 440 of the mold 4 is in close contact with the sloped surface 320 of the inner peripheral end of the partial slide mold 32, and the outer wall 62 of the upper half-divided body 6 is
The lower end is formed into an inclined surface. As shown in FIG. 6, the slant surface 430 of the slide die 4 is provided with the concave portion 310 of the movable die 3.
Since it is fitted inside, the slope 430 of the slide mold 4 does not hinder the mold matching.
【0020】また、上半割体6の外側壁62の外面はそ
の最大輪郭部までを雌型30によって、アンダーカット
部を部分スライド型32によって各々成形され、全体と
して円弧状に形成される。なお、スライド型4側のカム
92が可動型3側の収納凹部95内に収納されるので、
カム92が型合わせの障害となることもない。The outer surface of the outer wall 62 of the upper half-split body 6 is formed by the female die 30 up to the maximum contour portion and the partial slide die 32 by the undercut portion, and is formed into an arc shape as a whole. Since the cam 92 on the slide die 4 side is stored in the storage recess 95 on the movable die 3 side,
The cam 92 does not hinder the mold matching.
【0021】さらに、スライド型4の雄型部44の外周
縁が型抜き方向に略垂直に形成されていることから、上
半割体6の外側壁62の内面はほぼ型抜き方向に平行に
形成される。また、スライド型4の雄型部44には外周
側及び中央部に凹部が形成されていることから、上半割
体6内面の外縁側及び中央には位置決め用突起60、6
1が形成される。Further, since the outer peripheral edge of the male die portion 44 of the slide die 4 is formed substantially perpendicular to the die cutting direction, the inner surface of the outer wall 62 of the upper half-divided body 6 is substantially parallel to the die cutting direction. It is formed. Further, since the male die portion 44 of the slide die 4 is formed with the concave portions on the outer peripheral side and the central portion, the positioning projections 60, 6 are formed on the outer edge side and the central portion of the inner surface of the upper half-split body 6.
1 is formed.
【0022】また、可動型3の雄型部31には外周側に
ほぼ可動型3の位置決め用の凹部に対応して型抜き方向
に略平行な縦溝部が、又中央部に縦溝部が形成されてい
ることから、下半割体7は外側壁72が上半割体6の位
置決め用突起60に嵌合しうる寸法に形成されるととも
に、外側壁72の外面は略型抜き方向に平行な面に設定
され、又下半割体7の内面中央には脚部71が形成され
る。Further, a vertical groove portion is formed on the outer peripheral side of the male die portion 31 of the movable die 3 so as to be substantially parallel to the die cutting direction corresponding to a concave portion for positioning the movable die 3, and a vertical groove portion is formed in the central portion. Therefore, the outer wall 72 of the lower half-split body 7 is formed to have a size that allows the outer wall 72 to be fitted into the positioning projection 60 of the upper half-split body 6, and the outer surface of the outer half wall 72 is substantially parallel to the die cutting direction. And a leg portion 71 is formed at the center of the inner surface of the lower half-split body 7.
【0023】1次成形が完了し、所定時間が経過して注
入樹脂が冷却固化すると、射出ノズルを後退させるとと
もに、可動型3を後退させる。すると、図2に示すよう
に、部分スライド型32はばね部材96の付勢力によっ
て非スライド位置に付勢されていることから、1次成形
された上半割体6は可動型3の雌型部30内に確実に保
持され、又下半割体7が1次射出用スプルー樹脂部分に
よってスライド型4の雌型部43内に保持され、こうし
て可動型3とスライド型4とが1次型開きされる。ま
た、駄肉部分である上半割体6の1次射出用スプルー樹
脂部分64がスライド型4の1次射出用スプルー40か
ら抜け出るので、これを手動によって切断するか、又は
ロボットを用いて切断する。When the injection molding resin is cooled and solidified after a lapse of a predetermined time after the completion of the primary molding, the injection nozzle is retracted and the movable mold 3 is retracted. Then, as shown in FIG. 2, since the partial slide die 32 is urged to the non-sliding position by the urging force of the spring member 96, the primary-molded upper half body 6 is the female die of the movable die 3. The lower half-split body 7 is securely held in the portion 30, and the lower half-split body 7 is held in the female die portion 43 of the slide die 4 by the primary injection sprue resin portion, and thus the movable die 3 and the slide die 4 are the primary die. Be opened. Further, since the primary injection sprue resin portion 64 of the upper half-divided body 6 which is a paddle portion comes out from the primary injection sprue 40 of the slide die 4, this is manually cut or cut by using a robot. To do.
【0024】このように1次成形が終了すると、スライ
ド型4を第1の型締位置から図3下側の第2の型締位置
にスライドさせ、可動型3を前進させて可動型3とスラ
イド型4とを図3に示すように型合せし、雌型部30、
43内の上下の分割体6、7を衝合わせる。When the primary molding is completed in this way, the slide die 4 is slid from the first die clamping position to the second die clamping position on the lower side of FIG. 3, and the movable die 3 is advanced to move the movable die 3 to the movable die 3. As shown in FIG. 3, the slide mold 4 and the female mold part 30,
The upper and lower divided bodies 6 and 7 in 43 are butted against each other.
【0025】すると、スライド型4側のカム90は可動
型3下側の空間に位置される一方、スライド型4側のカ
ム91、92が可動型3側のカム溝93、94に嵌入さ
れて部分スライド型32が可動型3の雌型部30に対し
て非スライド位置に位置決めされる。Then, the cam 90 on the slide die 4 side is positioned in the space below the movable die 3, while the cams 91, 92 on the slide die 4 side are fitted into the cam grooves 93, 94 on the movable die 3 side. The partial slide die 32 is positioned in a non-sliding position with respect to the female die portion 30 of the movable die 3.
【0026】また、図7に示すように、スライド型4の
斜面430は部分スライド型32の内周端の斜面320
に密着して上半割体6の外側壁62傾斜面を押し上げ、
外側壁62を可動型の雌型30に押し付ける結果、上半
割体6は雌型30に隙間なく正確に位置決めされる。Further, as shown in FIG. 7, the sloped surface 430 of the slide mold 4 is a sloped surface 320 at the inner peripheral end of the partial slide mold 32.
And push up the outer wall 62 inclined surface of the upper half-divided body 6,
As a result of pressing the outer wall 62 against the movable female mold 30, the upper half-divided body 6 is accurately positioned in the female mold 30 without a gap.
【0027】また、上半割体6内面外縁側の位置決め用
突起60に下半割体7の側壁72の先端部分が嵌合し、
又上半割体6内面中央の位置決め用突起61に下半割体
7中央の脚部71先端部分が嵌合し、上下の半割体6、
7が相互に型締方向及びこれと直角な方向とに位置決め
される。The tip portion of the side wall 72 of the lower half-split body 7 is fitted into the positioning projection 60 on the outer edge side of the inner surface of the upper half-split body 6,
Further, the tip of the leg portion 71 at the center of the lower half-split body 7 is fitted to the positioning protrusion 61 at the center of the inner surface of the upper half-split body 6, and the upper and lower half-split bodies 6,
7 are positioned relative to each other in the mold clamping direction and the direction perpendicular thereto.
【0028】同時に、ほぼ型抜き方向に延びる上半割体
6の側壁62の内面と下半割体7の側壁72の外面との
間に所定の間隙が形成される。At the same time, a predetermined gap is formed between the inner surface of the side wall 62 of the upper half-split body 6 and the outer surface of the side wall 72 of the lower half-split body 7 which extend in the die-cutting direction.
【0029】なお、このときスライド型4の1次射出用
スプルー40、41が固定型2のホットランナ21から
切り離されて2次射出用スプルー42が固定型2のホッ
トランナ21に連通されるが、固定型2のホットランナ
21の一端側がスライド型4上側の空間に開口されるの
で、開閉弁23を閉じておく。At this time, the primary injection sprues 40 and 41 of the slide die 4 are separated from the hot runner 21 of the fixed die 2 and the secondary injection sprue 42 is communicated with the hot runner 21 of the fixed die 2. Since one end side of the hot runner 21 of the fixed die 2 is opened to the space above the slide die 4, the open / close valve 23 is closed.
【0030】こうして2次型締めが完了し、射出ノズル
から溶融樹脂を射出すると、溶融樹脂がスプルー20、
ホットランナー21及び2次射出用スプルー42を経て
上下の半割体6、7の外側壁62、72間の間隙に注入
され、上下の半割体6、7が相互に接合される。In this way, when the secondary mold clamping is completed and the molten resin is injected from the injection nozzle, the molten resin is sprued,
It is injected into the gap between the outer walls 62, 72 of the upper and lower halves 6, 7 through the hot runner 21 and the secondary injection sprue 42, and the upper and lower halves 6, 7 are joined together.
【0031】所定時間が経過して注入樹脂8が冷却固化
し、可動型3を後退させると、操作レバー97にフック
部材98が係合して操作レバー97を揺動させ、部分ス
ライド型32がスライド位置に後退されて成形品5の保
持が解除されるので、成形品5をエジェクト機構(図示
せず)によってエジェクトすると、スライド型4側のス
プルー樹脂部分を有する製品5が得られるので、後はこ
れらの駄肉部分を切断し、ナット74を取り付けると、
図5に示すスポイラー5を製造できる。When the injected resin 8 is cooled and solidified after a lapse of a predetermined time and the movable die 3 is retracted, the hook member 98 engages with the operating lever 97 to swing the operating lever 97, and the partial slide die 32 is moved. Since the molded product 5 is released from the slide position and the holding of the molded product 5 is released, when the molded product 5 is ejected by the eject mechanism (not shown), the product 5 having the sprue resin portion on the slide die 4 side is obtained. Cut these sloppy parts and attach the nut 74,
The spoiler 5 shown in FIG. 5 can be manufactured.
【0032】以上のような本実施例の成形方法及び型で
は、スライド型4の雌型部43の外周に斜面430を形
成し、2次型締めの際に上記斜面430によって上半割
体6の外周壁62を雌型30に向って押し付けるように
したので、2次射出時に上半割体6を雌型30に隙間な
く密着でき、接合用樹脂8が外観を重視すべき上半割体
6側に回り込むのを確実に阻止して接合部バリの発生を
防止できる。In the molding method and mold of the present embodiment as described above, the slant surface 430 is formed on the outer periphery of the female mold portion 43 of the slide mold 4, and the upper half-split body 6 is formed by the slant surface 430 when the secondary mold is clamped. Since the outer peripheral wall 62 is pressed toward the female die 30, the upper half-divided body 6 can be adhered to the female die 30 without a gap during the secondary injection, and the bonding resin 8 should place importance on the appearance. It is possible to reliably prevent wraparound on the 6 side and prevent burrs from occurring at the joint.
【0033】しかも、型抜き方向に略平行な上半割体6
の側壁62内面と下半割体7の側壁72外面との間の間
隙に接合用樹脂8を注入して接合するようにしたので、
接合部位をスポイラー5の比較的外観を軽視できる下半
割体7側に設定することができ、これによってもスポイ
ラー5の外観性を保証できる。Moreover, the upper half-split body 6 which is substantially parallel to the die cutting direction
Since the bonding resin 8 is injected into the gap between the inner surface of the side wall 62 of the and the outer surface of the side wall 72 of the lower half-split body 7, the bonding is performed.
The joint portion can be set on the side of the lower half-split body 7, which allows the appearance of the spoiler 5 to be relatively neglected, and this also ensures the appearance of the spoiler 5.
【0034】また、本実施例の成形方法及び型では、ス
ライド型4の雌型部43外周に斜面430を形成し、2
次射出時に上半割体6を雌型30に押し付けるようにし
たので、上半割体6に比較的大きな樹脂収縮が発生する
場合には斜面430の修正によって上半割体6を正確に
位置決めでき、樹脂収縮分の型修正を容易に行うことが
できる。Further, in the molding method and mold of this embodiment, the inclined surface 430 is formed on the outer periphery of the female mold portion 43 of the slide mold 4, and
Since the upper half-split body 6 is pressed against the female mold 30 at the time of the next injection, when the relatively large resin shrinkage occurs in the upper half-split body 6, the upper half-split body 6 is accurately positioned by correcting the slope 430. Therefore, the mold shrinkage of the resin can be easily corrected.
【0035】さらに、本実施例の成形方法及び型では、
上下の半割体6、7を型内で衝合わせる際に、上半割体
6内面の位置決め用突起60、61と下半割体7の側壁
72及び脚部71とを相互に嵌合させて上下の半割体
6、7を相互に型締方向及びこれと直角方向とに位置決
めし、又上半割体6の側壁62内面と下半割体7の側壁
72の外面との間を樹脂8で接合するようにしたので、
上下の半割体6、7を型締方向及びこれと直角方向とに
位置決めしつつ、広い面積で接合できる結果、従来のよ
うに単に衝合部外周縁を接合する場合に比し、上下の半
割体6、7を高い強度で接合できる。Further, in the molding method and mold of this embodiment,
When the upper and lower halves 6, 7 are brought into abutment with each other in the mold, the positioning projections 60, 61 on the inner surface of the upper halve 6 and the side wall 72 and the leg 71 of the lower halve 7 are fitted to each other. Upper and lower halves 6, 7 are positioned relative to each other in the mold clamping direction and in a direction perpendicular thereto, and between the inner surface of the side wall 62 of the upper half body 6 and the outer surface of the side wall 72 of the lower half body 7. Since it was made to join with resin 8,
Since the upper and lower halves 6 and 7 can be positioned in the mold clamping direction and the direction perpendicular thereto, and can be joined over a wide area, the upper and lower half halves can be joined as compared to the conventional case where the outer peripheral edge of the abutting portion is joined. The halves 6 and 7 can be joined with high strength.
【0036】[0036]
【発明の効果】以上のように、本発明に係る中空体の製
造方法及びその型によれば、外観を重視すべき表側部材
と、比較的外観を軽視できる裏側部材とを重ね合わせて
ダイスライドインジェクション法にて中空体を成形する
に際し、2次射出のための型合せ時に裏側部材を押さえ
る型の裏側部材外周部に斜面を形成し、2次型締め時に
上記斜面によって表側部材の外周壁を雌型に向って押し
付け、その状態で2次射出を行うようにしたので、表側
部材に接合部バリができるのを確実に防止でき、又樹脂
収縮分の型修正を容易にできる効果がある。As described above, according to the hollow body manufacturing method and mold of the present invention, the die slide is performed by superposing the front side member whose appearance is important and the back side member whose appearance is relatively negligible. When molding a hollow body by the injection method, an inclined surface is formed on the outer peripheral portion of the back side member of the mold that holds the back side member at the time of mold matching for secondary injection, and the outer peripheral wall of the front side member is formed by the inclined surface at the time of secondary mold clamping. Since the secondary injection is performed in the state of pressing it toward the female mold, it is possible to reliably prevent the formation of a joint burr on the front side member, and it is possible to easily correct the mold due to the resin shrinkage.
【図1】 本発明の一実施例による中空体の製造方法に
おける1次射出成形の工程及びその型構造を示す模式図
である。FIG. 1 is a schematic view showing a step of primary injection molding and a mold structure thereof in a method for manufacturing a hollow body according to an embodiment of the present invention.
【図2】 上記成形方法における1次射出成形後の型開
き状態及びその型構造を示す模式図である。FIG. 2 is a schematic diagram showing a mold opening state and a mold structure after primary injection molding in the above molding method.
【図3】 上記製造方法における2次射出成形工程及び
その型構造を示す模式図である。FIG. 3 is a schematic diagram showing a secondary injection molding step and its mold structure in the above manufacturing method.
【図4】 上記製造方法における2次射出成形工程後の
型開き状態及びその型構造を示す模式図である。FIG. 4 is a schematic view showing a mold opening state and a mold structure after the secondary injection molding step in the above manufacturing method.
【図5】 上記製造方法における上半割体の1次射出成
形工程及びその型構造の要部を示す一部断面図である。FIG. 5 is a partial cross-sectional view showing a primary injection molding step of the upper half-split body and a main part of its mold structure in the above manufacturing method.
【図6】 上記製造方法における下半割体の1次射出成
形工程及びその型構造の要部を示す一部断面図である。FIG. 6 is a partial cross-sectional view showing a primary injection molding step of a lower half-split body and a main part of its mold structure in the above manufacturing method.
【図7】 上記製造方法における上下の半割体の2次射
出成形工程及びその型構造の要部を示す一部断面図であ
る。FIG. 7 is a partial cross-sectional view showing the secondary injection molding process of the upper and lower halves and the main part of the mold structure thereof in the above manufacturing method.
【図8】 上記製造方法によって成形された自動車用ス
ポイラーを示す要部断面図である。FIG. 8 is a cross-sectional view of an essential part showing an automobile spoiler molded by the above manufacturing method.
【図9】 上記自動車用スポイラーを示す要部底面図で
ある。FIG. 9 is a bottom view of an essential part showing the automobile spoiler.
3 可動型 30 雌型部 4 スライド型 44 雌型部 440 斜面 5 自動車用スポイラー 6 上半割
体 7 下半割体 8 接合用
樹脂3 Movable type 30 Female type part 4 Sliding type 44 Female type part 440 Slope 5 Automotive spoiler 6 Upper half body 7 Lower half body 8 Resin for bonding
Claims (2)
観を軽視できる裏側部材とを重ね合わせてダイスライド
インジェクション法にて中空体を成形する方法におい
て、 2次射出のための型合せ時に裏側部材を押さえる型の裏
側部材外周部に斜面を形成し、 型締めにより上記斜面によって表側部材の外周壁を雌型
に向って押し付けつつ2次射出を行うことを特徴とする
中空体の製造方法。1. A method of molding a hollow body by a die slide injection method by superposing a front side member, which should be emphasized in appearance, and a back side member, whose appearance is comparatively negligible, at the time of mold matching for secondary injection. A method for manufacturing a hollow body, characterized in that an inclined surface is formed on an outer peripheral portion of a back side member of a die for holding the back side member, and the secondary injection is performed while pressing the outer peripheral wall of the front side member toward the female die by the inclined surface by clamping. .
観を軽視できる裏側部材とを重ね合わせてダイスライド
インジェクション法にて中空体を成形する型において、 中空体の型開き投影方向の最大輪郭部よりも裏側部材側
に型割面が形成され、2次射出のための型合せ時に裏側
部材を押さえる型の裏側部材外周部には斜面が形成さ
れ、2次射出時の型締めによって上記斜面が表側部材の
外周壁を雌型に向って押し付けることを特徴とする中空
体の成形型。2. A mold for forming a hollow body by a die slide injection method by superimposing a front side member, which should be emphasized in appearance, and a back side member, which can be comparatively neglected in appearance, in the mold opening projection direction of the hollow body. A mold splitting surface is formed on the back side member side with respect to the contour portion, and a slope is formed on the back side member outer peripheral portion of the mold that presses the back side member at the time of matching the mold for the secondary injection. A hollow-body forming die characterized in that an inclined surface presses an outer peripheral wall of a front member toward a female die.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24564891A JPH082556B2 (en) | 1991-09-25 | 1991-09-25 | Hollow body manufacturing method and mold thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24564891A JPH082556B2 (en) | 1991-09-25 | 1991-09-25 | Hollow body manufacturing method and mold thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0584771A JPH0584771A (en) | 1993-04-06 |
JPH082556B2 true JPH082556B2 (en) | 1996-01-17 |
Family
ID=17136772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24564891A Expired - Fee Related JPH082556B2 (en) | 1991-09-25 | 1991-09-25 | Hollow body manufacturing method and mold thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH082556B2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4666671B2 (en) * | 2000-05-26 | 2011-04-06 | 株式会社ミツバ | Injection molded body and method for producing the same |
JP4666672B2 (en) * | 2000-05-26 | 2011-04-06 | 株式会社ミツバ | Injection molded body and method for producing the same |
JP4037279B2 (en) * | 2003-01-31 | 2008-01-23 | 株式会社モルテン | INJECTION MOLDING METHOD AND MOLDING MOLD THEREOF |
JP4114925B2 (en) * | 2003-04-16 | 2008-07-09 | 河西工業株式会社 | Automotive interior parts |
JP4891098B2 (en) * | 2007-01-15 | 2012-03-07 | 株式会社ミツバ | Injection molded body, method for manufacturing injection molded body, and mold for manufacturing injection molded body |
JP4891097B2 (en) * | 2007-01-15 | 2012-03-07 | 株式会社ミツバ | Injection molded body, method for manufacturing injection molded body, and mold for manufacturing injection molded body |
WO2008087853A1 (en) * | 2007-01-15 | 2008-07-24 | Oshima Electric Works Co., Ltd. | Injection-molded body, method for manufacturing injection-molded body and molding die for manufacturing injection-molded body |
JP4897756B2 (en) * | 2008-09-08 | 2012-03-14 | 株式会社日本製鋼所 | Method and apparatus for molding hollow molded article |
JP6877965B2 (en) | 2016-11-24 | 2021-05-26 | キヤノン株式会社 | Manufacturing method of liquid supply unit |
-
1991
- 1991-09-25 JP JP24564891A patent/JPH082556B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0584771A (en) | 1993-04-06 |
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