JPS6139893B2 - - Google Patents
Info
- Publication number
- JPS6139893B2 JPS6139893B2 JP12512379A JP12512379A JPS6139893B2 JP S6139893 B2 JPS6139893 B2 JP S6139893B2 JP 12512379 A JP12512379 A JP 12512379A JP 12512379 A JP12512379 A JP 12512379A JP S6139893 B2 JPS6139893 B2 JP S6139893B2
- Authority
- JP
- Japan
- Prior art keywords
- gate
- mold
- hole
- cavity
- slide core
- 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
- 238000007493 shaping process Methods 0.000 claims 1
- 239000012768 molten material Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000012805 post-processing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は、管体特に折れ部を有する短管の成
形に好適な成形用金型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding die suitable for molding a tube body, particularly a short tube having a bent portion.
第１図に示す如き〓状管を射出成型により製造
する場合、従来は第２図に示す成形用金型が用い
られていた。第２図において、１は製品、２は固
定板、３は可動板、４はアンギユラピン、５は第
１のスライドコア、６は第２のスライドコア、７
はスプルゲート（ダイレクトゲート）及び８はス
トリツパである。 When manufacturing a round tube as shown in FIG. 1 by injection molding, a molding die shown in FIG. 2 has conventionally been used. In Fig. 2, 1 is the product, 2 is the fixed plate, 3 is the movable plate, 4 is the angular pin, 5 is the first slide core, 6 is the second slide core, and 7
is a sprue gate (direct gate) and 8 is a stripper.
しかし、この構成においては、製品１の後仕上
げ作業が容易となりまた金型の構造が簡単である
が、ゲートが単一のスプルゲート７である為、溶
ゆう材料に加わる高い射出圧力が分散されず、キ
ヤビテイ９内の圧力分布が不均一となつて、第１
のスライドコア５と第２のスライドコア６が相接
する図に丸印で囲む部分にコアの押し曲げが生じ
いわゆる偏肉現象の発生により成形不能となる
他、射出時の高圧力によつて金型が破損するとい
う欠点があつた。上記圧力分布の不均一は多点ゲ
ートとすることによつて軽減することができる
が、金型の構造が複雑となり、これに伴つて後加
工の工数が増加する為、費用が大巾に増大すると
いう欠点があつた。 However, in this configuration, the post-finishing work of the product 1 is easy and the structure of the mold is simple, but since the gate is a single sprue gate 7, the high injection pressure applied to the molten material is not dispersed. , the pressure distribution inside the cavity 9 becomes uneven, and the first
The core is pressed and bent in the area circled in the figure where the slide core 5 and the second slide core 6 are in contact with each other, resulting in so-called thickness unevenness phenomenon, which makes it impossible to mold, and also due to high pressure during injection. The drawback was that the mold was damaged. The uneven pressure distribution mentioned above can be alleviated by using multi-point gates, but the structure of the mold becomes complicated and the number of post-processing steps increases accordingly, resulting in a significant increase in costs. There was a drawback of doing so.
この発明は、上記した従来の欠点を除去する為
になされたもので、貫通孔をスライドコアに形成
することにより実質上多点ゲートとすることによ
り、金型の構造を複雑にすることなく射出時のキ
ヤビテイ内の圧力分布を従来に比して均一にする
ことができる管体の成形用金型を提供することを
目的とする。 This invention was made to eliminate the above-mentioned drawbacks of the conventional technology. By forming through holes in the slide core, it is essentially a multi-point gate, and injection can be performed without complicating the structure of the mold. It is an object of the present invention to provide a mold for forming a tubular body, which can make the pressure distribution inside the cavity more uniform than before.
以下、この発明の一実施例を図について説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第３図において、１０は貫通孔で、第１のスラ
イドコア５のコア部５ａに、その軸方向と直交す
る向き即ち溶ゆう材料のゲート７からの射出方向
と同一向きに貫通形成されており、図において
は、閉型時のゲート７と同一軸線上に位置してい
る。１１は突き出し用のシリンダ装置で、開型動
作完了時にその突き出しロツド１１ａが第１のス
ライドコア５の貫通孔１０と同軸上に並ぶように
可動板３に備えつけられており、第１のスライド
コア５の開型動作完了時に伸縮駆動される。 In FIG. 3, reference numeral 10 denotes a through hole, which is formed through the core portion 5a of the first slide core 5 in a direction perpendicular to its axial direction, that is, in the same direction as the injection direction of the molten material from the gate 7. In the figure, it is located on the same axis as the gate 7 when the mold is closed. Reference numeral 11 denotes an ejecting cylinder device, which is installed on the movable plate 3 so that its ejecting rod 11a is aligned coaxially with the through hole 10 of the first slide core 5 when the mold opening operation is completed. When the mold opening operation in Step 5 is completed, it is driven to extend and contract.
以上の構成においては、スプルーゲート７から
キヤビテイ９内に射出された溶ゆう材料の一部は
貫通孔１０を通つて直接キヤビテイ９のスプルー
ゲート７に対して裏側となる部分に射出され、キ
ヤビテイ９にはスプルーゲート７と貫通孔１０の
一方開口の２点より溶ゆう材料が流入し第４図に
示すように充てんされる。 In the above configuration, a part of the molten material injected into the cavity 9 from the sprue gate 7 is directly injected into the part of the cavity 9 on the back side with respect to the sprue gate 7 through the through hole 10. The molten material flows into the sprue gate 7 and one opening of the through hole 10, and is filled as shown in FIG.
溶ゆう材料の流入は、貫通孔１０のキヤビテイ
９への一方の開口部が、スプルーゲート７のキヤ
ビテイ９への開口部に向けられておればよい。
唯、この実施例の如く貫通孔１０のキヤビテイ９
への一方の開口部とスプルーゲート７のキヤビテ
イ９への開口部とが完全に一致し、更に貫通孔１
０とスプルーゲート７とが同軸上に設けられる
と、最も円滑に溶ゆう材料がキヤビテイ９に流入
する。 The inflow of the molten material can be achieved by oriented one opening of the through hole 10 into the cavity 9 toward the opening of the sprue gate 7 into the cavity 9.
However, as in this embodiment, the cavity 9 of the through hole 10
One opening to the sprue gate 7 and the opening to the cavity 9 of the sprue gate 7 perfectly match, and the through hole 1
When the sprue gate 7 and the sprue gate 7 are coaxially arranged, the melting material flows into the cavity 9 most smoothly.
溶ゆう材料が固化し成形が完了すると従来の場
合と同様に開型操作が行われるが、開型動作が始
まり第１のスライドコア５が図示矢印方向に移動
すると、貫通孔１０内の固化部分Ａの基部にせん
断力が働く為、このせん断力によつて固化部分Ａ
が第５図に示す如く切離される。開型動作が完了
すると、シリンダ装置１１が駆動され、突き出し
ロツド１１ａが伸縮する。これによつて、突き出
しロツド１１ａが貫通孔１０に対して挿脱される
から固化部分Ａは貫通孔１０から第６図に示す如
く押し出され、製品１がスライドコア５から離れ
落下する。 When the molten material solidifies and the molding is completed, the mold opening operation is performed as in the conventional case, but when the mold opening operation begins and the first slide core 5 moves in the direction of the arrow shown in the figure, the solidified portion inside the through hole 10 Since shear force acts on the base of A, this shear force causes the solidified part A to
are separated as shown in FIG. When the mold opening operation is completed, the cylinder device 11 is driven and the ejector rod 11a expands and contracts. As a result, the ejector rod 11a is inserted into and removed from the through hole 10, so that the solidified portion A is pushed out from the through hole 10 as shown in FIG. 6, and the product 1 separates from the slide core 5 and falls.
なお、上記実施例は単一ゲートの場合を示した
が、多点ゲートの場合にも同様の効果が得られる
ことは明らかである。 Note that although the above embodiment shows the case of a single gate, it is clear that similar effects can be obtained also in the case of multi-point gates.
以上の如く、この発明によれば、スライドコア
に貫通孔が形成され、この貫通孔のキヤビテイへ
の一方の開口部がゲートのキヤビテイへの開口部
に向けられているから第２のゲートとして機能
し、構造上は単一ゲートであるが実質上は多点ゲ
ートとなる上、溶ゆう材料がスライドコアの上記
ゲートに対して反対側から射出されるから、金型
の構造を複雑にすることなく、射出時のキヤビテ
イ内の圧力分布が従来に比して大巾に均一化さ
れ、前記した偏肉現象の発生防止等成形効率を大
巾に高めることができ、しかも成形後の後加工が
簡単であり、射出時の圧力による金型破損の恐れ
を軽減することができる。 As described above, according to the present invention, a through hole is formed in the slide core, and one opening of the through hole to the cavity is directed to the opening of the gate to the cavity, so that it functions as a second gate. However, although the structure is a single gate, it is actually a multi-point gate, and the molten material is injected from the opposite side of the slide core to the gate, which complicates the structure of the mold. As a result, the pressure distribution inside the cavity during injection is much more uniform than before, making it possible to greatly improve molding efficiency by preventing the occurrence of the uneven thickness phenomenon described above, and further improving post-processing after molding. It is simple and can reduce the risk of mold breakage due to pressure during injection.
第１図は製品の斜視図、第２図は従来の成形用
金型の縦断面図、第３図はこの発明による管体の
成形用金型の一実施例の縦断面図、第４図ないし
第６図は上記実施例の動作説明図である。
５…スライドコア、７…スプルゲート、１０…
貫通孔、１１ａ…突き出しロツド。なお、図中、
同一符号は同一又は相当部分を示す。
FIG. 1 is a perspective view of the product, FIG. 2 is a vertical cross-sectional view of a conventional molding die, FIG. 3 is a vertical cross-sectional view of an embodiment of a mold for forming a tube according to the present invention, and FIG. 4 6 through 6 are explanatory diagrams of the operation of the above embodiment. 5...Slide core, 7...Sprue gate, 10...
Through hole, 11a... protruding rod. In addition, in the figure,
The same reference numerals indicate the same or equivalent parts.
Claims (1)
ライドコアに形成され、該貫通孔のキヤビテイへ
の一方の開口部がゲートのキヤビテイへの開口部
に向けられていることを特徴とする管体の成形用
金型。1. A tube characterized in that a through hole into which a protruding rod is inserted and removed when the mold is opened is formed in the slide core, and one opening of the through hole to the cavity is directed to the opening of the gate to the cavity. Mold for shaping the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12512379A JPS5649227A (en) | 1979-09-27 | 1979-09-27 | Metal die for forming tubular body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12512379A JPS5649227A (en) | 1979-09-27 | 1979-09-27 | Metal die for forming tubular body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5649227A JPS5649227A (en) | 1981-05-02 |
| JPS6139893B2 true JPS6139893B2 (en) | 1986-09-06 |
Family
ID=14902407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12512379A Granted JPS5649227A (en) | 1979-09-27 | 1979-09-27 | Metal die for forming tubular body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5649227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144592U (en) * | 1985-02-27 | 1986-09-06 | ||
| JPS6347596U (en) * | 1986-09-16 | 1988-03-31 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847555A (en) * | 1981-09-17 | 1983-03-19 | Toshiba Corp | Producing device for die cast parts |
| JPS5971618U (en) * | 1982-11-05 | 1984-05-15 | 日本パイオニクス株式会社 | Heating element for foot warming |
| JPS60244455A (en) * | 1984-05-16 | 1985-12-04 | Mazda Motor Corp | Production of piston |
| JPS62174121A (en) * | 1986-01-29 | 1987-07-30 | Honda Motor Co Ltd | Molding of block and molding equipment |
| JPH04179524A (en) * | 1990-11-14 | 1992-06-26 | Sansho Giken Kk | Undersize synthetic resin part and injection molding method thereof |
| CN104841911B (en) * | 2015-06-01 | 2016-08-31 | 孙利元 | Automatic alloy casting rod machine |
| CN108746536B (en) * | 2018-06-07 | 2020-05-15 | 常州巨石新能源科技有限公司 | Integrated die-casting method for water pipe joint on side wall of cavity |
-
1979
- 1979-09-27 JP JP12512379A patent/JPS5649227A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144592U (en) * | 1985-02-27 | 1986-09-06 | ||
| JPS6347596U (en) * | 1986-09-16 | 1988-03-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5649227A (en) | 1981-05-02 |
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