JPH0131462Y2 - - Google Patents
Info
- Publication number
- JPH0131462Y2 JPH0131462Y2 JP1983113439U JP11343983U JPH0131462Y2 JP H0131462 Y2 JPH0131462 Y2 JP H0131462Y2 JP 1983113439 U JP1983113439 U JP 1983113439U JP 11343983 U JP11343983 U JP 11343983U JP H0131462 Y2 JPH0131462 Y2 JP H0131462Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- core
- split mold
- split
- tapered
- 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
Links
- 238000001746 injection moulding Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は、インターナルアンダカツト部を有す
る射出成型用コア金型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a core mold for injection molding having an internal undercut portion.
一般に、成型品内面のアンダカツト処理方法に
は、(a)置中子を使用して成型品を取出してから中
子を抜く方法、(b)アンダカツト部を突出して手で
横にずらして離型する方法、(c)コアをつぼめる機
構による方法、(d)内側スライドコアを使用する方
法が知られている。そして、本考案は、(c)の方法
であるコラブシブル・コアに関するもので、この
方法には各種の提案がされているが、本出願人も
実公昭53−42618号公報に提案をしている。 Generally, methods for removing undercuts on the inner surface of a molded product include (a) using a placing core to take out the molded product and then pulling out the core, and (b) releasing the mold by protruding the undercut and moving it sideways by hand. (c) a method using a mechanism that collapses the core; and (d) a method using an inner sliding core. The present invention relates to method (c), which is a collabible core. Various proposals have been made for this method, and the present applicant also made a proposal in Publication of Utility Model Publication No. 42618/1983. .
一方、合成樹脂製枝管継手においては、第１図
に示すように、例えば、コンクリート製の大径の
本管１に対し、合成樹脂製の小径の枝管２を連結
するに際し、本管１の側面に別途作成された合成
樹脂製の枝管継手３を接着剤を介して固着し、該
枝管継手３に枝管２を挿入して連結する。この枝
管継手３には図示のようにシールリング溝５が管
内に形成され、このため該枝管継手３を射出成形
により成形する際、アンダカツトを構成してい
る。ところが、本管１に対し枝管２の軸心方向が
一定ではなく、円錐角αの範囲で余裕をもたす要
望が生じている。この要望に応えるため、いわゆ
る角度自在管継手である枝管継手３が必要とな
り、該枝管継手３を射出成形により成形しようと
すれば、新たにアンダーカツト部が出現された。
すなわち、第１図で、開口端４にはゴム等のシー
ルリング溝５は従来どおり必要であり、枝管継手
３の奥部はいわゆる先太りのもので、ラツパ状に
拡張してテーパー部６を構成し、枝管２が該枝管
継手３に挿入された際、シールリング溝５のあた
りを支点として、円錐角α、すなわち、テーパー
部６の傾斜角αの範囲で自由な角度をとることが
できるようにして、本管に連結する。そのため、
このテーパー部６が新たなアンダカツト部として
発生している。 On the other hand, in a synthetic resin branch pipe joint, as shown in FIG. 1, when connecting a small diameter branch pipe 2 made of synthetic resin to a large diameter main pipe 1 made of concrete, for example, A separately prepared synthetic resin branch pipe joint 3 is fixed to the side surface of the pipe with an adhesive, and the branch pipe 2 is inserted into the branch pipe joint 3 and connected. As shown in the figure, a seal ring groove 5 is formed in the pipe of this branch pipe joint 3, so that an undercut is formed when the branch pipe joint 3 is molded by injection molding. However, the axial direction of the branch pipe 2 with respect to the main pipe 1 is not constant, and there is a demand for a margin within the range of the cone angle α. In order to meet this demand, a branch pipe joint 3, which is a so-called angle-adjustable pipe joint, is required, and when the branch pipe joint 3 is attempted to be molded by injection molding, a new undercut portion appears.
That is, in FIG. 1, a seal ring groove 5 made of rubber or the like is required at the open end 4 as before, and the deep part of the branch pipe joint 3 has a so-called tapered part, which expands into a tapered part 6. When the branch pipe 2 is inserted into the branch pipe joint 3, it takes a free angle within the range of the conical angle α, that is, the inclination angle α of the tapered portion 6, with the area around the seal ring groove 5 as a fulcrum. Connect it to the mains so that it can be connected to the mains. Therefore,
This tapered portion 6 is generated as a new undercut portion.
そこで、本出願人の前記した実公昭53−42618
号公報のものを利用して、シールリング溝５及び
テーパ部６のアンダーカツト部を有することの合
成樹脂製枝管継手の型抜きを試みたが、実公昭53
−42618号公報のものは、成形金型における中心
を通る半径方向の線に関して対称に傾斜する傾斜
肩面を有する第１の割金型のグループと、該第１
の割金型と交互に配置された第２の割金型のグル
ープが、夫々の傾斜肩面で摺動自在となつてアン
ダーカツト部を抜去るようになつているので、こ
れら傾斜肩面が夫々鋭角を形成し、当該金型を量
産する生産設備として用いれば、いわゆるカジリ
現象を起こし、生産設備としては耐久性に問題が
発生した。 Therefore, the applicant's above-mentioned Utility Model Publication No. 53-42618
I attempted to cut out a synthetic resin branch pipe joint having the seal ring groove 5 and the undercut part of the tapered part 6 by using the one in the publication, but it was
-42618 publication includes a group of first split molds each having an inclined shoulder surface that is symmetrically inclined with respect to a radial line passing through the center of the mold;
The groups of second split molds arranged alternately with the second split molds are slidable on their respective inclined shoulder surfaces to remove the undercut portion. If these molds were used as production equipment for mass production, a so-called galling phenomenon would occur, resulting in problems with the durability of the production equipment.
本考案はこの問題を解決するために案出された
ものである。 The present invention was devised to solve this problem.
以下、本考案を添付図面にもとづいて説明す
る。第２図は本考案の実施例の軸線に沿う断面
図、第３図は第２図のＸ−Ｘ断面図を示す。 Hereinafter, the present invention will be explained based on the accompanying drawings. FIG. 2 is a sectional view taken along the axis of the embodiment of the present invention, and FIG. 3 is a sectional view taken along the line X--X in FIG.
第２図および第３図に示すように、本考案のコ
ア金型は、金型の第１の端部（第２図において左
方）から第２の端部（第２図において右方）へ向
かつて直径が減少するようにテーパーとなつてい
る側壁を有する不等辺六角形のテーパーコア７を
含んでいる。 As shown in FIGS. 2 and 3, the core mold of the present invention extends from the first end (left side in FIG. 2) to the second end (right side in FIG. 2) of the mold. It includes a tapered core 7 in the form of a scalene hexagon with sidewalls tapering in diameter towards the end.
アンダーカツト部を含むプラスチツク成型品３
の内面を成型すべきコア金型外表面は、テーパー
コア７の周囲に交互に配置されたそれぞれ３片に
分割された第１の割金型群１０，１０，１０と、
第２の割金型群１５，１５，１５の外周面によつ
て形成される。 Plastic molded product 3 including undercut part
The outer surface of the core mold in which the inner surface of the core mold is to be molded consists of a first split mold group 10, 10, and 10 each divided into three pieces arranged alternately around the tapered core 7;
It is formed by the outer peripheral surfaces of the second split mold group 15, 15, 15.
第１の割金型各自１０は、テーパーコア７に対
し縦方向の相対運動は許容しないが、半径方向の
運動は許容するように連結される。そのためそれ
らとテーパーコア７の長辺側壁との間に、第１の
端部から第２の端部へ向かつて先細になつている
中間スライドピース群８，８，８が配置され、中
間スライドピース８と第１の割金型１０とはその
一方に設けた縦方向のあり９1と他方に設けたあ
り溝９2によりなるあり継手９により連結される。
中間スライドピース８はまた、テーパーコア７の
長辺側壁に設けた縦方向のあり溝９2内をスライ
ドし得るあり９1を有し、同様にあり継手９によ
つてテーパーコア７に対しスライド自在に連結さ
れる。しかしながら第１の割金型１０はテーパー
コア７に対しそれぞれの対応位置に設けた深穴１
２内を摺動する連結ピン１１によつて連結され
る。従つて型開き時その根本１７においてボルト
２０によつてエジエクタープレート１９へ接続さ
れている中間スライドピース８を第１の端部の方
向へ引抜くとき、第１の割金型１０はテーパーコ
ア７へ接近する方向へ移動し、成型品３の内面か
ら離れる（第５および６図参照）。 Each of the first split molds 10 is connected to the tapered core 7 in such a manner that it does not allow relative movement in the vertical direction, but allows movement in the radial direction. Therefore, intermediate slide piece groups 8, 8, 8, which are tapered from the first end to the second end, are arranged between them and the long side walls of the tapered core 7, and the intermediate slide pieces 8 and the first split mold 10 are connected by a dovetail joint 9 formed by a vertical dovetail 9 1 provided on one side and a dovetail groove 9 2 provided on the other side.
The intermediate slide piece 8 also has a dovetail 9 1 that can slide in a longitudinal dovetail groove 9 2 provided in the long side wall of the tapered core 7 , and similarly slides against the tapered core 7 by the dovetail joint 9 . Can be freely connected. However, the first split mold 10 has deep holes 1 formed at respective corresponding positions with respect to the tapered core 7.
They are connected by a connecting pin 11 that slides within the two. Therefore, when the intermediate slide piece 8, which is connected at its root 17 to the ejector plate 19 by the bolt 20, is pulled out in the direction of the first end when opening the mold, the first split mold 10 is removed from the tapered core. 7 and away from the inner surface of the molded article 3 (see FIGS. 5 and 6).
第２の割金型群１５，１５，１５はテーパーコ
ア７の短辺側壁へありおよびあり溝よりなるあり
継手９によつて縦方向にスライド自在に直接連結
されている。 The second split die group 15, 15, 15 is directly connected to the short side wall of the tapered core 7 by a dovetail joint 9 consisting of a dovetail and a dovetail groove so as to be slidable in the vertical direction.
テーパーコア７は、その第１の端部において駆
動板１８へボルト２１により固着される。従つて
型開き時、中間スライドピース８が第５図に示す
位置に引抜かれた後、駆動板１８が図面において
左方へ移動すれば、それへ接続されたテーパーコ
ア７、およびテーパーコア７へピン接続された第
１の割金型群１０，１０，１０はともに成型品３
から脱出し、その時第２の割金型群１５，１５，
１５はテーパーコア７の短辺側面に沿つてスライ
ドし、半径方向へ互いに接近し、成型品３の内表
面から離れる（第７および第８図参照）。 The tapered core 7 is fixed at its first end to the drive plate 18 by bolts 21 . Therefore, when the mold is opened, after the intermediate slide piece 8 is pulled out to the position shown in FIG. The pin-connected first split mold group 10, 10, 10 are both molded products 3.
At that time, the second split mold group 15, 15,
15 slide along the short sides of the tapered core 7, approach each other in the radial direction, and move away from the inner surface of the molded product 3 (see FIGS. 7 and 8).
第１の割金型群１０，１０，１０は、型開き
時、最初中間スライドピース８を引抜くにつれ隣
接する第２の割金型１５，１５間を半径方向内側
に移動し、次にテーパーコア７とともに隣接する
第２の割金型１５，１５間を縦方向に移動しなけ
ればならない。これらの運動を可能とするために
は、第１の割金型１０の形状は第４図の概略図に
示すようになつている。すなわち第１の割金型１
０が隣接する第２の割金型１５，１５間を半径方
向内側へ移動可能であるためにはその両側２４，
２４は半径方向において少なくとも互いに平行で
なくてはならない。すなわち第３，６および８の
断面で見て、これら両側面２４，２４は互いに平
行であるか、もしくは半径方向内側へ向かつて末
広がりの形状となつている。 When opening the mold, the first split mold group 10, 10, 10 first moves inward in the radial direction between the adjacent second split molds 15, 15 as the intermediate slide piece 8 is pulled out, and then tapers. It must be moved along with the core 7 in the vertical direction between the adjacent second split molds 15, 15. In order to enable these movements, the shape of the first split mold 10 is as shown in the schematic diagram of FIG. 4. That is, the first split mold 1
In order for 0 to be able to move radially inward between the adjacent second split molds 15, 15, both sides 24,
24 must be at least parallel to each other in the radial direction. That is, when viewed in the third, sixth and eighth cross-sections, these side surfaces 24, 24 are either parallel to each other or have a shape that widens radially inward.
また第１の割金型１０が隣接する第２の割金型
間を第１の端部の方向へ縦に移動可能であるため
には、その横幅が第１の端部から第２の端部へ向
かつて収れんする先細となつていなければならな
い。従つて第１の割金型１０の外表面と側面２４
とが合体するエツジ部２６は鈍角である。 In addition, in order for the first split mold 10 to be vertically movable between adjacent second split molds in the direction of the first end, the width thereof must be the same as that from the first end to the second end. It should be tapered to converge towards the end. Therefore, the outer surface and side surface 24 of the first split mold 10
The edge portion 26 where the two join together has an obtuse angle.
反対に、第２の割金型１５の両側面２５，２５
は半径方向内側へ向かつて互いに収れんし、その
横幅は第１の端部から第２の端部へ向かつて互い
に平行であるかまたは互いに末広がりとなつてお
り、その外表面と側面２５とが合体するエツジ部
２６は鋭角である。 On the contrary, both sides 25, 25 of the second split mold 15
converge toward each other radially inward, and their widths are parallel to each other or diverge from each other as they move from the first end to the second end, and the outer surface and the side surface 25 meet. The edge portion 26 is an acute angle.
成型時、固定板２２へ向かつて駆動板１８およ
びエジエクタープレート１９を互いに接触するま
で金型の第２の端部へ向かつて動かし、テーパー
コア７のまわりに第１の割金型群１０，１０，１
０と第２の割金型群１５，１５，１５とが交互に
集合したコアを形成する。コアのまわりに成型品
３の厚みに相当する空間を残して第１のキヤビテ
イー金型１６および第２のキヤビテイー金型２３
を配置し、キヤビテイーを形成する。プラスチツ
ク材料を射出成型後、型開きは次のように行われ
る。 During molding, the drive plate 18 and ejector plate 19 are moved toward the fixed plate 22 and toward the second end of the mold until they contact each other, and the first split mold group 10 is placed around the tapered core 7. 10,1
0 and the second split mold group 15, 15, 15 form a core in which they are alternately assembled. The first cavity mold 16 and the second cavity mold 23 are left with a space corresponding to the thickness of the molded product 3 around the core.
and form a cavity. After injection molding the plastic material, the mold is opened as follows.
〔第１工程〕
駆動板１８に設けた空間２７を利用して、中間
スライドピース８，８，８を連結したプレート１
９を第２図で左方へ移動し、中間スライドピース
８，８，８を引抜く。これら中間スライドピース
８，８，８と第１の割金型１０，１０，１０とは
第２図において角度βを形成してあり継手９によ
つて連結されているので第１の割金型１０，１
０，１０も同一方向に一体となつて移動しようと
する力が働くが、該割金型１０，１０，１０は、
駆動板１８へ固着されているテーパーコア７へ第
３図に示すように結合ピン１１，１１によつて縦
方向の相対運動をしないように連結されているの
で、該方向（水平方向）の移動は阻止されてい
る。その代わり、結合ピン１１，１１が第３図に
示す半径方向の深孔１２，１２内をスライドし、
第１の割金型１０，１０，１０は、中間スライド
ピース８，８，８の縦方向の移動分だけ半径方向
内側へ移動し、アンダーカツト部であるシールリ
ング溝５及びテーパー部６より外れる。この状態
を第５図及びそのＸ−Ｘ断面である第６図に示
す。[First step] Using the space 27 provided in the drive plate 18, the plate 1 is connected with the intermediate slide pieces 8, 8, 8.
9 to the left in FIG. 2, and pull out the intermediate slide pieces 8, 8, 8. These intermediate slide pieces 8, 8, 8 and the first split molds 10, 10, 10 form an angle β in FIG. 2 and are connected by a joint 9. 10,1
0 and 10 also act as a force to move as one in the same direction, but the split molds 10, 10, 10,
As shown in FIG. 3, the tapered core 7 fixed to the drive plate 18 is connected to the drive plate 18 by connecting pins 11, 11 so as not to move relative to each other in the vertical direction, so that movement in that direction (horizontal direction) is prevented. is being prevented. Instead, the coupling pins 11, 11 slide within deep radial holes 12, 12 shown in FIG.
The first split molds 10, 10, 10 move inward in the radial direction by the amount of vertical movement of the intermediate slide pieces 8, 8, 8, and come out of the seal ring groove 5 and the tapered part 6, which are the undercut parts. . This state is shown in FIG. 5 and FIG. 6, which is a cross section taken along the line X-X.
〔第２工程〕
第１工程でプレート１９が第５図中左方向へ移
動したので、次いで、駆動板１８を同じく左方に
移動することにより、これと一体になつているテ
ーパーコア７が同方向に移動する。テーパーコア
７と第２の割金型１５，１５，１５とは第５図に
おいて角度βをもつたあり継手９で連結されてい
ることから、第２の割金型１５，１５，１５もテ
ーパーコア７とともに移動しようとする力が働く
が、第２の割金型１５，１５，１５は第５図に示
すように、固定板２２端部が当接し停止されてい
る縦方向の移動は阻止されている。その代わり、
第２の割金型１５は第６図に示す位置から半径方
向へ内側へ移動し、成型品３の内面から離れる。
この時既に半径方向へ移動し、かつ第２の端部へ
向かつて次第に横幅が狭くなつている第１の割金
型１０の第１の端部への移動により隣接する第２
の割金型１５間には空〓が形成されているので、
前記運動が可能になる。換言すれば、第１の割金
型１０，１０，１０を完全に第５図で左方に移動
して抜去ることにより、第２の割金型１５，１
５，１５の半径方向の直下に存在しないようにし
なくても、軸方向に連動して第２の割金型１５，
１５，１５はつぼみ作用を始めることができ、型
開きの工程時間の短縮をはかることができる。こ
れを第７図及びそのＸ−Ｘ断面である第８図に示
す。[Second Step] In the first step, the plate 19 moved to the left in FIG. move in the direction. Since the tapered core 7 and the second split molds 15, 15, 15 are connected by a dovetail joint 9 having an angle β in FIG. 5, the second split molds 15, 15, 15 are also tapered. Although a force is exerted to move the core 7 together, the second split molds 15, 15, 15 are stopped from moving in the vertical direction by the end of the fixing plate 22 coming into contact with each other, as shown in FIG. has been done. Instead,
The second split mold 15 moves radially inward from the position shown in FIG. 6 and separates from the inner surface of the molded product 3.
At this time, the first split mold 10, which has already moved in the radial direction and whose width gradually becomes narrower toward the second end, is moved to the first end, and the adjacent second mold is moved to the first end.
Since a void is formed between the split molds 15,
The movement becomes possible. In other words, by completely moving the first split molds 10, 10, 10 to the left in FIG. 5 and removing them, the second split molds 15, 1
5, 15, the second split mold 15,
15, 15 can start the bud action, and can shorten the mold opening process time. This is shown in FIG. 7 and FIG. 8, which is a cross section taken along the line X--X.
なお、第２図中、結合ピン１１，１１の位置
は、左右に分かれて位置し、第３図中では、結合
ピン１１，１１は一つの第１の割金型１０にしか
示していないが、他の第１の割金型１０，１０に
も適宜設けており、これらは省略している。 In addition, in FIG. 2, the positions of the joining pins 11, 11 are located separately on the left and right, and in FIG. 3, the joining pins 11, 11 are only shown on one first split mold 10. , are also appropriately provided in the other first split molds 10, 10, and these are omitted.
また、あり継手の形状は図示した鳩尾形のみな
らず、Ｔ字形であつてもよい。 Further, the shape of the dovetail joint is not limited to the illustrated dovetail shape, but may be T-shaped.
以上のように、２種の割金型群で構成し、これ
ら割金型群で円筒状としてインターナルアンダカ
ツト部を有する射出成型用コア金型において、第
１の割金型群が「つぼんだ」後、これらを軸方向
に引出し、第２の割金型群を前記第１の割金型群
の軸方向運動に連動して「つぼみ」作用せしめる
ようにしたものである。第１の割金型群には鋭角
を有するエツジ部が構成されないので、生産設備
として、耐久性を有するのみならず、型開きが迅
速に行われる。 As described above, in the core mold for injection molding which is composed of two types of split mold groups and has a cylindrical internal undercut part, the first split mold group is '', these are then pulled out in the axial direction, and the second split mold group is caused to act as a "bud" in conjunction with the axial movement of the first split mold group. Since the first split mold group does not have an edge portion having an acute angle, it not only has durability as a production facility, but also can open the mold quickly.
第１図は合成樹脂製枝管継手と本管との連結断
面図、第２図は本考案の実施例の断面図（第３図
のＹ〜Ｙ断面を示す）、第３図は第２図のＸ〜Ｘ
断面図、第４図は第１の割金型と第２の割金型の
概略斜視図、第５図は第１工程終了後の金型の断
面図、第６図は第５図のＸ〜Ｘ断面図、第７図は
第２工程終了後の金型の断面図、第８図は第７図
のＸ〜Ｘ断面図を示す。
３……枝管継手、５……シールリング溝、６…
…テーパー部、１０……第１の割金型、１５……
第２の割金型、２６……エツジ部。
Figure 1 is a cross-sectional view of the connection between a synthetic resin branch pipe joint and the main pipe, Figure 2 is a cross-sectional view of an embodiment of the present invention (showing the Y-Y cross section of Figure 3), and Figure 3 is a cross-sectional view of the connection between a synthetic resin branch pipe joint and a main pipe. X to X in the diagram
4 is a schematic perspective view of the first split mold and the second split mold, FIG. 5 is a sectional view of the mold after the first step, and FIG. 6 is the X in FIG. -X sectional view, FIG. 7 shows a sectional view of the mold after the second step, and FIG. 8 shows a XX sectional view of FIG. 7. 3... Branch pipe joint, 5... Seal ring groove, 6...
... Taper part, 10 ... First split mold, 15 ...
Second split mold, 26... edge part.
Claims (1)
プラスチツク部材の射出成型用コア金型であつ
て、 該金型の第１の端部から第２の端部へ向かつて
直径が減少するようにテーパーとなつている側壁
を有する多角型テーパーコアと、 前記テーパーコアの周囲に交互に配置され、集
合して前記プラスチツク部材のアンダーカツト部
を含む内表面を成型するためのコア金型外表面を
形成する第１および第２の割金型群と、 前記第１の割金型群の各自と前記テーパーコア
との間に配置され、第１の端部から第２の端部へ
向かつて先細になつている中間スライドピースを
備え、 前記第１および第２の割金型群は、前記テーパ
ーコアの周囲に交互に密接して配置された成型位
置から第１の割金型のみを半径方向内側へ移動し
かつ前記第１の端部の方向へ第１の割金型を隣接
する第２の割金型間から引抜くことができるよう
に分割された分割面を有し、 前記中間スライドピースは前記テーパーコアお
よび前記第１の割金型群に対し縦方向にスライド
自在に連結され、かつ前記第１の割金型群は前記
テーパーコアに対し縦方向の相対運動は許容しな
いが半径方向の運動は許容するように連結され、 前記第２の割金型群の各自は前記テーパーコア
に対し縦方向にスライド自在に連結され、 型開き時、前記中間スライドピースを第１の端
部の方向へ引抜き、それによつて前記第１の割金
型群の各自を前記テーパーコアへ向かつて半径方
向へ移動させるための手段と、 前記スライドピースを引抜いた後、前記テーパ
ーコアおよびそれへ連結された第１の割金型を第
１の端部の方向へ引抜き、それによつて前記第２
の割金型群の各自を内側へ向かつて移動させるた
めの手段 を備えていることを特徴とする前記射出成型用コ
ア金型。[Claims for Utility Model Registration] A core mold for injection molding of a cylindrical hollow plastic member having an internal undercut, the core mold having a diameter from a first end to a second end of the mold. a polygonal tapered core having decreasingly tapered sidewalls; core metals arranged alternately around the tapered core and collectively forming an inner surface of the plastic member including the undercut portion; a first and a second split mold group forming an outer surface of the mold; disposed between each of the first split mold groups and the tapered core, and extending from a first end to a second end; an intermediate slide piece tapering toward the tapered core; radially inward and the first split mold can be pulled out from between the adjacent second split molds in the direction of the first end. , the intermediate slide piece is vertically slidably connected to the tapered core and the first split mold group, and the first split mold group is prevented from relative movement in the vertical direction with respect to the tapered core. The second split mold group is connected to allow movement in the radial direction but not allowed, and each of the second split mold groups is connected to be slidable in the longitudinal direction with respect to the tapered core, and when the mold is opened, the intermediate slide piece is means for withdrawing the slide piece in the direction of the end of the slide piece, thereby moving each of the first split mold groups radially towards the tapered core; and after withdrawing the slide piece, the tapered core and a first split mold connected thereto in the direction of the first end, thereby pulling out the second split mold.
The core mold for injection molding, characterized in that the core mold for injection molding is provided with means for moving each of the split mold groups inwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11343983U JPS6022308U (en) | 1983-07-20 | 1983-07-20 | Core mold for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11343983U JPS6022308U (en) | 1983-07-20 | 1983-07-20 | Core mold for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6022308U JPS6022308U (en) | 1985-02-15 |
| JPH0131462Y2 true JPH0131462Y2 (en) | 1989-09-27 |
Family
ID=30262602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11343983U Granted JPS6022308U (en) | 1983-07-20 | 1983-07-20 | Core mold for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6022308U (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342618U (en) * | 1976-09-16 | 1978-04-12 | ||
| JPS542228A (en) * | 1977-06-03 | 1979-01-09 | Ford Motor Co | Method of plating lighttweigh metal capable of improving corrosion resistivity in transverse direction |
| JPS5513891A (en) * | 1978-05-22 | 1980-01-31 | Pneumo Corp | Displacementt phase converter |
| JPS5573513A (en) * | 1978-11-28 | 1980-06-03 | Kubota Ltd | Metal mold device for forming end of plastic pipe |
| JPS5619716A (en) * | 1979-07-28 | 1981-02-24 | Kubota Ltd | Core die for forming tap |
| JPS5622692A (en) * | 1979-06-30 | 1981-03-03 | Matsushita Electric Works Ltd | Manufacture of dressing asbestos cement board |
| JPS577895A (en) * | 1980-06-13 | 1982-01-16 | Toshiba Corp | Manufacture of single crystal |
-
1983
- 1983-07-20 JP JP11343983U patent/JPS6022308U/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342618U (en) * | 1976-09-16 | 1978-04-12 | ||
| JPS542228A (en) * | 1977-06-03 | 1979-01-09 | Ford Motor Co | Method of plating lighttweigh metal capable of improving corrosion resistivity in transverse direction |
| JPS5513891A (en) * | 1978-05-22 | 1980-01-31 | Pneumo Corp | Displacementt phase converter |
| JPS5573513A (en) * | 1978-11-28 | 1980-06-03 | Kubota Ltd | Metal mold device for forming end of plastic pipe |
| JPS5622692A (en) * | 1979-06-30 | 1981-03-03 | Matsushita Electric Works Ltd | Manufacture of dressing asbestos cement board |
| JPS5619716A (en) * | 1979-07-28 | 1981-02-24 | Kubota Ltd | Core die for forming tap |
| JPS577895A (en) * | 1980-06-13 | 1982-01-16 | Toshiba Corp | Manufacture of single crystal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6022308U (en) | 1985-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4552384A (en) | Molded-joint assembly | |
| JPS62181125A (en) | Pipe joint and manufacture and production unit thereof | |
| US4352772A (en) | Method and apparatus for injection-molding a manifold onto a set of hollow elements | |
| CA1094768A (en) | Method of molding socket of plastic resin tube | |
| IE42251B1 (en) | Improvements relating to the manufacture of pipe couplings | |
| IE860081L (en) | Applying seals to plastic pipe ends. | |
| JP2585601B2 (en) | Core structure for molding equipment | |
| US6234782B1 (en) | Injection mould for making a bucket with a pivotal handle | |
| CN104955591B (en) | Telescopic core and the cast mold half assembled with it | |
| CN114055734B (en) | Injection mold for automobile structural part | |
| CN216968524U (en) | Aperture forming assembly for automobile structural part | |
| US6348173B1 (en) | Core pulls concentric with ejector pins | |
| JPH0431483B2 (en) | ||
| JPH0131462Y2 (en) | ||
| EP0188301B1 (en) | Method for manufacturing a sealing body, particularly for a pipe joint, and mould for manufacturing a sealing body | |
| JP3537744B2 (en) | Injection mold | |
| CN216992869U (en) | Barb demoulding structure for automobile structural part | |
| JPS5830658Y2 (en) | Mold for molding plastic products | |
| CN211917552U (en) | Injection mold of outer tube ball socket | |
| JP2960347B2 (en) | Molding method for hollow resin products | |
| JPS60189431A (en) | Manufacture of hollow product | |
| JPH0242646B2 (en) | ||
| CN111558690B (en) | Core box of annular sand core | |
| JPS5944215B2 (en) | injection mold | |
| JPH06226795A (en) | Injection mold |