JPS63109030A - Injection mold - Google Patents

Injection mold

Info

Publication number
JPS63109030A
JPS63109030A JP61254467A JP25446786A JPS63109030A JP S63109030 A JPS63109030 A JP S63109030A JP 61254467 A JP61254467 A JP 61254467A JP 25446786 A JP25446786 A JP 25446786A JP S63109030 A JPS63109030 A JP S63109030A
Authority
JP
Japan
Prior art keywords
resin
runners
runner
cavities
mold
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
Application number
JP61254467A
Other languages
Japanese (ja)
Other versions
JPH0725101B2 (en
Inventor
Makoto Maruta
誠 丸田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP61254467A priority Critical patent/JPH0725101B2/en
Priority to KR1019870004040A priority patent/KR900007340B1/en
Publication of JPS63109030A publication Critical patent/JPS63109030A/en
Publication of JPH0725101B2 publication Critical patent/JPH0725101B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To make quantities of resin injected in cavities constant, and consequently uniformize the quality of product by a structure wherein runners are branched by a plurality of branch low paths, each of which is provided so as to extend normal to the flow path on upperstream side. CONSTITUTION:To the end of each of horizontal runners 10, one end of each of vertical runners 11, which intersect the horizontal runners 10 at right angles and extend toward a mold main body 1 side, is connected. Further, to the other ends of the vertical runners 11, three branched runners 12..., which extend normal to the vertical runners 11, are connected respectively. Because the running directions of resin are respectively bent at 90 deg., when the resin flowing through the vertical runners 11 flows in the branch runners 12..., the absorption of the rectilinear energy of resin becomes uniform, resulting in allowing to make the quantity of resin injected in each of cavities 5 constant and consequently to prevent defective product from generating.

Description

【発明の詳細な説明】 ［産業上の利用分野］ この発明は、限られた金型スペース内に多数のキャビテ
ィを設けることができる射出成形金型に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an injection mold that can provide a large number of cavities within a limited mold space.

［従来の技術］ 近年、−個の金型内に複数のキャビティを設け、−度に
複数の製品を成形することができるように構成した射出
成形金型が多用されつつある。このような射出成形金型
としては、従来、複数のキャビティを有する金型本体に
、その裏面側の壁部に開口する樹脂導入口を形成し、か
つ金型本体に、上記樹脂導入口から分岐して金型本体の
裏面と平行な方向へ向かって延びる複数の水平ランナー
と、これら水平ランナーの端部から水平ランナーと直交
する方向へ向かって延び、各キャビティに連通ずる垂直
ランナーとを形成した射出成形金型が提供されている。[Prior Art] In recent years, injection molding molds that are configured to have a plurality of cavities in each mold so that a plurality of products can be molded at one time have come into widespread use. Conventionally, such injection molds have a mold body having a plurality of cavities with a resin inlet opening opened on the back wall of the mold body, and a resin inlet opening branching from the resin inlet into the mold body. to form a plurality of horizontal runners extending in a direction parallel to the back surface of the mold body, and a vertical runner extending from the ends of these horizontal runners in a direction perpendicular to the horizontal runners and communicating with each cavity. An injection mold is provided.

ここで、上記キャビティは、樹脂導入口の軸線を中心と
した同心円上に配置されており、水平ランナーおよび垂
直ランナーの長さが各々一定になされている。このよう
な射出成形金型においては、樹脂導入口からキャビティ
へ至るまでの距離が一定であるから、樹脂とランナー内
面との摩擦による抵抗にばらつきが生じることがなく、
どのキャビティにも一定量の樹脂が射出されるので、製
品の品質を均一化することができろ。Here, the cavities are arranged on a concentric circle centered on the axis of the resin inlet, and the lengths of the horizontal runner and the vertical runner are each made constant. In such injection molds, the distance from the resin inlet to the cavity is constant, so there is no variation in resistance due to friction between the resin and the inner surface of the runner.
Since a fixed amount of resin is injected into every cavity, the quality of the product can be made uniform.

ところが、このような射出成形金型゛においては、ラン
ナーの長さを一定にするために、キャビティを樹脂導入
口の軸線を中心とした同心円上に配置しているから、多
数のキャビティを設けるためには金型を大形にしなけれ
ばならないという欠点がある。そこで、このような欠点
を取り除いたものとして、各水平ランナーの端部からさ
らに金型本体の裏面と平行な方向へ向かって分岐する分
岐ランナーを設け、各分岐ランナーの端部から分岐ラン
ナーと直交する方向へ向かって延びる垂直ランナーを設
けた射出成形金型が開発されている。However, in such injection molds, the cavities are arranged concentrically around the axis of the resin inlet in order to keep the runner length constant, so it is difficult to provide a large number of cavities. has the disadvantage that the mold must be large. Therefore, in order to eliminate this drawback, a branch runner is provided that branches from the end of each horizontal runner in a direction parallel to the back surface of the mold body, and a branch runner that branches from the end of each horizontal runner in a direction perpendicular to the branch runner is provided. Injection molds have been developed with vertical runners extending in the direction of

［発明が解決しようとする問題点］ ところが、上記のような射出成形金型においては、各キ
ャビティに射出される樹脂の量にばらつきが生じ、ぼり
ゃ充填不足などの不良品が多発するという問題があった
。すなわち、水平ランナーに対して小さな角度をもって
屈曲する分岐ランナーへ樹脂が流れるときは、樹脂の直
進性エネルギーが吸収される度合いが少ないために流れ
やすい半面、水平ランナーに対して大きな角度をもって
屈曲する分岐ランナーへは樹脂の直進性エネルギーが多
く吸収されるために流れにくい。このため、キャビティ
に射出される樹脂の量にばらつきが生じてしまうのであ
る。[Problems to be Solved by the Invention] However, in the above-mentioned injection mold, there is a problem that variations occur in the amount of resin injected into each cavity, resulting in frequent occurrence of defective products such as insufficient filling. was there. In other words, when resin flows to a branch runner that bends at a small angle with respect to the horizontal runner, it flows easily because the degree of linear energy of the resin is absorbed to a small extent, but on the other hand, when resin flows to a branch runner that bends at a large angle with respect to the horizontal runner, it flows easily. It is difficult for the resin to flow to the runner because a lot of the linear energy of the resin is absorbed. This results in variations in the amount of resin injected into the cavity.

［発明の目的］ この発明は、上記事情に鑑みてなされたもので、金型の
スペースを有効に用いてより多くのキャビティを配置す
ることができるのは勿論のこと、キャビティに射出する
樹脂の量を一定にすることができ、したがって製品の品
質を均一化することができる射出成形金型を提供するこ
とを目的とする。[Purpose of the invention] This invention was made in view of the above circumstances, and it is possible not only to effectively use the space of the mold to arrange more cavities, but also to reduce the amount of resin injected into the cavities. It is an object of the present invention to provide an injection mold that can make the quantity constant and therefore the quality of the product uniform.

［問題点を解決するための手段］ この発明の射出成形金型は、複数のキャビティを有する
金型本体に樹脂導入口を設け、かつ金型本体に、上記樹
脂導入口から分岐し、かつ流路途中でさらに分岐して上
記キャビティに連通ずるランナーを設けてなる射出成形
金型において、上記ランナーを、上流側の流路に対して
直交する方向へ向かって延びるように設けた複数の分岐
流路により分岐させて構成したものである。[Means for Solving the Problems] The injection molding mold of the present invention includes a resin inlet in a mold body having a plurality of cavities, and a resin inlet in the mold body that branches from the resin inlet. In an injection mold comprising a runner that further branches in the middle of the path and communicates with the cavity, the runner is provided with a plurality of branched flows extending in a direction perpendicular to the upstream flow path. It is constructed by branching into roads.

［作用］ 上記構成の射出成形金型にあっては、上流側の流路を流
れる樹脂の進行方向がすべて直角に曲°げられて各分岐
流路に流れ込むから、樹脂の直進性エネルギーの吸収量
が均一となる。したがって、各分岐流路へ一定量の樹脂
が供給され、キャビティに射出される樹脂の量が一定と
なる。[Function] In the injection mold having the above configuration, the resin flowing through the upstream flow path is bent at right angles and flows into each branch flow path, so that the straight energy of the resin is absorbed. The amount becomes uniform. Therefore, a constant amount of resin is supplied to each branch flow path, and the amount of resin injected into the cavity is constant.

１　［実施例コ 以下、第１図および第２図を参照しながら本発明の一実
施例について説明する。第１図は実施例の射出成形金型
を示す平面図である。この図に示す射出成形金型は、金
型本体１とこの金型本体１に対して接近離間可能になさ
れたマニホールド（金型本体）２とから構成されている
。金型本体ｌは、第２図に示すように、固定側型板３と
可動側型板４とから構成されており、これら固定側型板
３と可動側型板４とにより６個のキャビティ５・・・が
構成されている。これらキャビティ５・・・は、金型本
体Ｉ中心線Ｃ１およびρ、を挟んで線対称に位置せしめ
られている。また、固定側型板３には、各キャビティ５
の中央部と固定側型板３の裏面に開口する樹脂通路孔６
・・・が形成されており、樹脂通路孔６のキャビティ５
側の開口端部がゲート６ａとされている。1 [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing an injection molding die of an example. The injection mold shown in this figure is composed of a mold body 1 and a manifold (mold body) 2 that can approach and move away from the mold body 1. As shown in FIG. 2, the mold body l is composed of a fixed side mold plate 3 and a movable side mold plate 4, and the fixed side mold plate 3 and the movable side mold plate 4 form six cavities. 5... are configured. These cavities 5 are positioned symmetrically with respect to the center line C1 and ρ of the mold body I. In addition, each cavity 5 is provided on the fixed side template 3.
A resin passage hole 6 opens at the center of the mold plate 3 and the back side of the fixed side template 3.
... is formed, and the cavity 5 of the resin passage hole 6
The open end on the side is a gate 6a.

一方、マニホールド２には、上記樹脂通路孔６・・・に
それぞれ嵌合するスプルーブツシュ７・・・が取り付け
られている。スプルーブツシュ７は、マニホールド２に
より供給される樹脂をキャビティ５・・・へ射出するた
めのものである。また、マニホールド２には、その裏面
中央部に開口する樹脂導入口８が形成されている。樹脂
導入口８は、射出成形装置のノズル（図示せず）が嵌合
せしめられるものである。また、マニホールド２の内部
には、ランナー９が形成されている。ランナー９は、樹
脂導入口８から供給される樹脂を各キャビティ５・・・
へ送るための通路であって、次のように構成されている
。On the other hand, sprue bushes 7 are attached to the manifold 2 and fit into the resin passage holes 6, respectively. The sprue bush 7 is for injecting the resin supplied by the manifold 2 into the cavities 5 . Further, the manifold 2 is formed with a resin introduction port 8 that opens at the center of the back surface thereof. The resin inlet 8 is fitted with a nozzle (not shown) of an injection molding device. Furthermore, a runner 9 is formed inside the manifold 2. The runner 9 supplies the resin supplied from the resin inlet 8 to each cavity 5...
It is a passageway for sending to, and is configured as follows.

すなわち、マニホールド２の裏面側の壁部には、樹脂導
入口８の端部から左右方向へ向かって延びる水平ランナ
ー１０・ＩＯが形成されている。これら水平ランナー１
０・ｌＯの長さは、各々同一とされ、かつ端部が上下左
右に並んだ４個のキャビティ５・・・の中央に位置する
ように設定されている。また各水平ランナー■０の端部
には、水平ランナー１０と直交して金型本体ｌ側へ向か
って延びる垂直ランナー（上流側の流路）１１の一端部
がそれぞれ連通せしめられている。そして、垂直ランナ
ー１１の他端部には、垂直ランナー１１と直交する方向
へ延びる３つの分岐ランナー（分岐流路）１２・・・が
それぞれ連通せしめられている。That is, a horizontal runner 10/IO is formed on the back wall of the manifold 2 and extends from the end of the resin inlet 8 in the left-right direction. These horizontal runners 1
The lengths of 0.lO are the same, and the ends are set to be located in the center of the four cavities 5 arranged vertically and horizontally. Further, one end of a vertical runner (upstream flow path) 11 extending perpendicularly to the horizontal runner 10 toward the mold body l side is communicated with the end of each horizontal runner (20). Three branch runners (branch flow paths) 12 extending in a direction perpendicular to the vertical runner 11 are communicated with the other end of the vertical runner 11, respectively.

分岐ランナー１２・・・は、上流である垂直ランナー１
１から供給される樹脂を等分して３つの方向へ送るもの
であって、長さが各々同一とされ、かつ端部が３つのキ
ャビティ５・・・のゲート６ａ・・・に対応して位置せ
しめられたものである。そして、これら分岐ランナー１
２の端部には、一端部が上記スプルーブツシュ７に連通
せしめられた垂直ランナー１３の他端部が連通せしめら
れている。The branch runner 12... is the upstream vertical runner 1
The resin supplied from 1 is divided equally and sent in three directions, each having the same length and an end corresponding to the gate 6a of the three cavities 5... It has been positioned. And these branch runners 1
One end of the vertical runner 13 communicates with the sprue bush 7, and the other end of the vertical runner 13 communicates with the end of the vertical runner 2.

このような射出成形金型においては、垂直ランナーＩＩ
を流れる樹脂が分岐ランナーＩ２・・・へ流れ込む際に
、樹脂の進行方向が各々直角に曲げられるから、樹脂の
直進性エネルギーの吸収量が均一となる。したかって、
各分岐ランナー１２・・・ヘ一定量の樹脂が供給され、
キャビティ５・・・に射出する樹脂の量を一定とするこ
とができ、ぼりゃ充填不足などの不良品の発生を未然に
防止することができるのは勿論のこと、キャビティに射
出する樹脂の量を一定に維持しつつ、キャビティを金型
本体ｌの任意の位置に配置することができるから、金型
本体ｌのスペースを有効に用いてより多くのキャビティ
を設けることができる。In such injection molds, vertical runner II
When the resin flowing through the branch runners I2... flows into the branch runners I2, the traveling directions of the resin are bent at right angles, so that the amount of linear energy absorbed by the resin becomes uniform. I wanted to,
A certain amount of resin is supplied to each branch runner 12,
The amount of resin injected into the cavity 5 can be kept constant, which not only prevents the occurrence of defective products such as insufficient filling, but also the amount of resin injected into the cavity. Since the cavities can be placed at any position in the mold body 1 while maintaining constant , more cavities can be provided by effectively using the space in the mold body 1.

なお、上記実施例では、ランナー９をその流路途中の一
箇所で分岐させているが、さらに下流側においても分岐
させるように構成すれば、より多くのキャビティを設け
るとかできる。また、樹脂導入口８をマニホールド２の
裏面側に設けているが、射出成形装置のノズルの位置に
より側面側に設けてもよい。In the above embodiment, the runner 9 is branched at one point in the flow path, but if the runner 9 is configured to branch further downstream, more cavities can be provided. Furthermore, although the resin inlet 8 is provided on the back side of the manifold 2, it may be provided on the side surface depending on the position of the nozzle of the injection molding device.

［発明の効果コ 以上説明したようにこの発明の射出成形金型では、複数
のキャビティを有する金型本体に樹脂導入口を設け、か
つ金型本体に、上記樹脂導入口から分岐し、かっ流路途
中でさらに分岐して上記°キャビティに連通ずるランナ
ーを設けてなる射出成形金型において、上記ランナーを
、上流側の流路に対して直交する方向へ向かって延びる
ように設けた複数の分岐流路により分岐させて構成して
いるので、金型のスペースを有効に用いてより多くのキ
ャビティを配置することができるのは勿論のこと、キャ
ビティに射出する樹脂の量を一定にすることができ、し
たがって、製品の品質を均一化することができるという
効果が得られる。[Effects of the Invention] As explained above, in the injection molding mold of the present invention, a resin inlet is provided in the mold body having a plurality of cavities, and the resin inlet is branched from the resin inlet into the mold body. In an injection mold, the runner is provided with a runner that further branches in the middle of the path and communicates with the cavity, and the runner is provided with a plurality of branches extending in a direction perpendicular to the upstream flow path. Since the resin is configured to be branched by flow channels, it is possible to effectively use the space in the mold to arrange more cavities, and it is also possible to maintain a constant amount of resin injected into the cavities. Therefore, it is possible to achieve the effect that the quality of the product can be made uniform.

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

第１図および第２図は本発明の一実施例を示す図であっ
て、第１図は射出成形金型用マニホールドを示す平面図
、第２図は第１図の■−■線視線面断面図る。 １・・・・・・金型本体、 ２・・・・・・マニホールド（金型本体）、５・・・・
・・キャビティ、 ８・・・・・・樹脂導入口、 ９・・・・・・ランナー、 １１・・・・・・垂直ランナー（上流側の流路）、１２
・・・・・分岐ランナー（分岐流路）。1 and 2 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a plan view showing a manifold for an injection mold, and FIG. 2 is a view taken along the line ■-■ in FIG. Cross section. 1... Mold body, 2... Manifold (mold body), 5...
...Cavity, 8...Resin inlet, 9...Runner, 11...Vertical runner (upstream flow path), 12
...Branch runner (branch flow path).

Claims (1)

【特許請求の範囲】[Claims] 複数のキャビティを有する金型本体に樹脂導入口を設け
、かつ金型本体に、上記樹脂導入口から分岐し、かつ流
路途中でさらに分岐して上記キャビティに連通するラン
ナーを設けてなる射出成形金型において、上記ランナー
は、上流側の流路に対して直交する方向へ向かって延び
るように設けられた複数の分岐流路により分岐せしめら
れていることを特徴とする射出成形金型。Injection molding, in which a resin inlet is provided in a mold body having a plurality of cavities, and a runner is provided in the mold body, which branches from the resin inlet and further branches in the middle of the flow path to communicate with the cavities. An injection mold characterized in that the runner is branched by a plurality of branch channels extending in a direction perpendicular to an upstream channel.
JP61254467A 1986-10-25 1986-10-25 Injection mold Expired - Lifetime JPH0725101B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP61254467A JPH0725101B2 (en) 1986-10-25 1986-10-25 Injection mold
KR1019870004040A KR900007340B1 (en) 1986-10-25 1987-04-27 Injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61254467A JPH0725101B2 (en) 1986-10-25 1986-10-25 Injection mold

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP5355296A Division JPH08229989A (en) 1996-03-11 1996-03-11 Injection molding die

Publications (2)

Publication Number Publication Date
JPS63109030A true JPS63109030A (en) 1988-05-13
JPH0725101B2 JPH0725101B2 (en) 1995-03-22

Family

ID=17265436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61254467A Expired - Lifetime JPH0725101B2 (en) 1986-10-25 1986-10-25 Injection mold

Country Status (2)

Country Link
JP (1) JPH0725101B2 (en)
KR (1) KR900007340B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008294267A (en) * 2007-05-25 2008-12-04 Nichia Corp Lead frame molding and method for manufacturing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200445230Y1 (en) * 2008-04-11 2009-07-10 백흥기 Rotary system for solar energy gathering panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596722U (en) * 1978-12-28 1980-07-04
JPS6156720U (en) * 1984-09-19 1986-04-16
JPS62109617A (en) * 1985-09-13 1987-05-20 ジヨブスト、アルリツチ、ジエラ−ト Heating manifold device for injection molding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596722U (en) * 1978-12-28 1980-07-04
JPS6156720U (en) * 1984-09-19 1986-04-16
JPS62109617A (en) * 1985-09-13 1987-05-20 ジヨブスト、アルリツチ、ジエラ−ト Heating manifold device for injection molding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008294267A (en) * 2007-05-25 2008-12-04 Nichia Corp Lead frame molding and method for manufacturing the same

Also Published As

Publication number Publication date
KR900007340B1 (en) 1990-10-08
KR880004917A (en) 1988-06-27
JPH0725101B2 (en) 1995-03-22

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