JP2692358B2 - Multiple mold equipment - Google Patents

Multiple mold equipment

Info

Publication number
JP2692358B2
JP2692358B2 JP23012190A JP23012190A JP2692358B2 JP 2692358 B2 JP2692358 B2 JP 2692358B2 JP 23012190 A JP23012190 A JP 23012190A JP 23012190 A JP23012190 A JP 23012190A JP 2692358 B2 JP2692358 B2 JP 2692358B2
Authority
JP
Japan
Prior art keywords
pin
mold
fixed
opening
die
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
Application number
JP23012190A
Other languages
Japanese (ja)
Other versions
JPH04112018A (en
Inventor
与志信 武田
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 Materials Corp
Original Assignee
Mitsubishi Materials 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 Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP23012190A priority Critical patent/JP2692358B2/en
Publication of JPH04112018A publication Critical patent/JPH04112018A/en
Application granted granted Critical
Publication of JP2692358B2 publication Critical patent/JP2692358B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、複数の製品合わせ面を有し、かつこれらの
製品合わせ面をそれぞれ開いて製品を取り出す構成の多
重成形金型装置に関する。
Description: BACKGROUND OF THE INVENTION The present invention relates to a multi-molding die apparatus having a plurality of product mating surfaces, and having a configuration in which these product mating surfaces are opened to take out products.

〔従来の技術〕[Conventional technology]

従来、この種の多重成形金型装置にあっては、固定型
と可動型との間に中間型が介装され、固定型の固定取付
板から中間型内のマニホールドまでにスプルーブッシュ
が設けられ、かつこのスプルーブッシュとマニホールド
内を通った溶融樹脂が、中間型と固定型との間及び中間
型と可動型との間の各製品合わせ面(パーティングライ
ン)に形成されたキャビティ内に供給されるようになっ
ている。
Conventionally, in this type of multiple molding die apparatus, an intermediate mold is interposed between a fixed mold and a movable mold, and a sprue bush is provided from a fixed mounting plate of the fixed mold to a manifold in the intermediate mold. The molten resin that has passed through the sprue bush and the manifold is supplied into cavities formed on the product mating surfaces (parting lines) between the intermediate mold and the fixed mold and between the intermediate mold and the movable mold. It is supposed to be.

〔発明が解決しようとする課題〕 ところで、上記従来の多重成形金型装置においては、
型開時に、固定型と中間型との間を開いてキャビティ内
の製品を取り出す場合には、固定型と中間型との間に大
径のスプルーブッシュが露出するために、スプルーブッ
シュが障害となって、離型した製品の取り出しが円滑に
いかないという問題があった。
[Problems to be Solved by the Invention] By the way, in the conventional multi-molding die apparatus,
When the mold is opened, if the product between the fixed mold and the intermediate mold is opened and the product in the cavity is taken out, the sprue bush with a large diameter will be exposed between the fixed mold and the intermediate mold. As a result, there is a problem that the removal of the released product is not smooth.

本発明は、上記事情に鑑みてなされたもので、その目
的とするところは、型開時に、従来のように大径のスプ
ルーブッシュが露出するようなことがなく、製品取り出
しの障害となるようなものがない上に、極めて円滑にか
つ確実に製品を離型し、取り出すことができる多重成形
金型装置を提供することにある。
The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a large-diameter sprue bush from being exposed when the mold is opened, which is an obstacle to product removal. It is an object of the present invention to provide a multi-molding die device which can remove and take out a product extremely smoothly and surely in addition to the above-mentioned ones.

〔課題を解決するための手段〕[Means for solving the problem]

上記目的を達成するために、本発明は、固定型から中
間型までの間に樹脂通路が形成され、上記中間型内の樹
脂通路に、連通路を有し、かつ上記固定型及び中間型の
樹脂通路を連通及び遮断する連通ピンが型開閉方向に移
動自在に設けられ、かつ上記固定型に、この固定型内の
樹脂通路を開放及び閉塞する開閉ピンが、上記連通ピン
に対向して型開閉方向に移動自在に設けられると共に、
上記連通ピンに平行に、この連通ピンを移動させる駆動
ピンが型開閉方向に設けられ、また、上記開閉ピンに平
行に、この開閉ピンを移動させる連通ピンが上記駆動ピ
ンに対向して型開閉方向に移動自在に設けられたもので
ある。
In order to achieve the above object, the present invention provides a resin passage between a fixed die and an intermediate die, the resin passage in the intermediate die has a communication passage, and the fixed die and the intermediate die. A communication pin that communicates and blocks the resin passage is provided movably in the mold opening and closing direction, and an opening and closing pin that opens and closes the resin passage in the fixed mold faces the communication pin. It is movably installed in the opening and closing direction,
A drive pin for moving the communication pin is provided in the mold opening / closing direction in parallel with the communication pin, and a communication pin for moving the opening / closing pin in parallel with the opening / closing pin faces the drive pin to open / close the mold. It is provided so as to be movable in any direction.

〔作用〕[Action]

本発明の多重成形金型装置にあっては、駆動ピンによ
って、連通ピンと開閉ピンを固定型側に移動させ、固定
型及び中間型の樹脂通路を連通ピンの連通路を介して連
通させて樹脂を供給すると共に、駆動ピンによって連通
ピンを中間型に戻し、中間型の樹脂通路を遮断し、かつ
連動ピンによって開閉ピンを移動させて固定型の樹脂通
路を閉塞して型開を行う。
In the multi-molding die device of the present invention, the drive pin moves the communication pin and the opening / closing pin to the fixed mold side so that the resin passages of the fixed mold and the intermediate mold are communicated with each other through the communication passage of the communication pin. In addition, the drive pin returns the communication pin to the intermediate mold to shut off the intermediate mold resin passage, and the interlocking pin moves the open / close pin to close the fixed mold resin passage and perform mold opening.

〔実施例〕〔Example〕

以下、第1図と第2図に基づいて本発明の一実施例を
説明する。
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

図中符号10は固定型であり、この固定型10に対して中
間型20が開閉自在に設けられ、かつこの中間型20に対し
て可動型30が開閉自在に設けられている。
Reference numeral 10 in the drawing is a fixed die, and an intermediate die 20 is provided on the fixed die 10 so as to be openable and closable, and a movable die 30 is provided on the intermediate die 20 so as to be openable and closable.

上記固定型10は、ロケートリング100aを備えた固定取
付板100と、この固定取付板100に取付けられた第1,第2
固定受板101,102と、この第2固定受板102に取付けられ
た固定型板103と、これらの第1,第2固定受板101,102及
び固定型板103の内部に装着された固定中空体104と、上
記固定取付板100に内装され、かつボルト105aによって
固定中空体104に取付けられたスプルーブッシュ105と、
このスプルーブッシュ105内の固定中空体104側に装着さ
れたフィルタ106と、上記固定中空体104の内部に形成さ
れた空所107に、型開閉方向に移動自在に設けられた一
対の取付板108,109と、これらの取付板108,109を中間型
20側に付勢するスプリング110と、上記取付板108,109に
基部をそれぞれ取付け、かつ中間型20側に接近、離間し
得る開閉ピン111及び連動ピン112と、上記固定中空体10
4の外周に設けられたコイルヒータ113とを主体として構
成されている。そして、上記スプルーブッシュ105及び
固定中空体104内を貫通して固定側樹脂通路114が形成さ
れており、この固定側樹脂通路114の中間型20側は、上
記開閉ピン111によって開放及び閉塞されるようになっ
ている。また、上記連動ピン112の先端は、固定中空体1
04に対して出没するようになっている。
The fixed mold 10 includes a fixed mounting plate 100 having a locate ring 100a, and first and second fixed mounting plates 100 mounted on the fixed mounting plate 100.
Fixed receiving plates 101 and 102, a fixed mold plate 103 attached to the second fixed receiving plate 102, and a fixed hollow body 104 mounted inside the first and second fixed receiving plates 101 and 102 and the fixed mold plate 103. A sprue bush 105 which is internally mounted on the fixed mounting plate 100 and which is mounted on the fixed hollow body 104 by a bolt 105a,
A filter 106 mounted on the fixed hollow body 104 side in the sprue bush 105 and a pair of mounting plates 108, 109 movably provided in the mold opening / closing direction in a cavity 107 formed inside the fixed hollow body 104. And these mounting plates 108 and 109
The spring 110 for urging to the 20 side, the opening / closing pin 111 and the interlocking pin 112 which can attach and detach the bases to the mounting plates 108 and 109, and can approach and separate from the intermediate die 20 side, and the fixed hollow body 10
The coil heater 113 provided on the outer periphery of the main body 4 is mainly configured. A fixed resin passage 114 is formed so as to penetrate through the sprue bush 105 and the fixed hollow body 104, and the intermediate die 20 side of the fixed resin passage 114 is opened and closed by the opening / closing pin 111. It is like this. The tip of the interlocking pin 112 has a fixed hollow body 1.
It appears to appear and disappear with respect to 04.

上記中間型20は、内部にマニホールド200aを装着した
中間部材200と、この中間部材200の固定型10側に取付け
られた第1中間受板201及び第1中間型板202と、上記中
間部材200の可動型30側に取付けられた第2中間受板203
及び第2中間型板204と、上記第1中間型板202及び第1
中間受板201の内部に装着され、かつ一端がマニホール
ド200aに接触した中間中空体205と、この中間中空体205
の外周に設けられたコイルヒータ206と、上記中間中空
体205及びマニホールド200a内に形成された中間側樹脂
通路207と、この中間側樹脂通路207及び中間部材200に
挿通された連通ピン208と、この連通ピン208の基部に連
結板209,210を介して取付けられ、かつ中間部材200及び
中間中空体205に挿通された駆動ピン211と、上記連結板
210にピストンロッド212を連結し、かつ第2中間受板20
3及び第2中間型板204に内装された油圧シリンダ213と
を主体として構成されている。そして、上記連通ピン20
8の先端側から基端側にかけて縮径部が形成され、この
縮径部が連通路214とされている。また、上記連通ピン2
08は、型閉時に、わずかなクリアランスを保って、上記
開閉ピン111に対向配置され、かつ連通ピン208の先端部
によって上記中間側樹脂通路207が連通及び遮断される
ようになっている。さらに、上記駆動ピン211は、型閉
時に、上記連動ピン112の先端面に当接させられてい
る。
The intermediate die 20 includes an intermediate member 200 having a manifold 200a installed therein, a first intermediate receiving plate 201 and a first intermediate die plate 202 attached to the fixed die 10 side of the intermediate member 200, and the intermediate member 200. Second intermediate receiving plate 203 attached to the movable mold 30 side of the
And the second intermediate mold plate 204, and the first intermediate mold plate 202 and the first intermediate mold plate 204.
The intermediate hollow body 205 mounted inside the intermediate receiving plate 201 and having one end in contact with the manifold 200a, and the intermediate hollow body 205.
A coil heater 206 provided on the outer periphery of the intermediate hollow body 205, an intermediate resin passage 207 formed in the intermediate hollow body 205 and the manifold 200a, a communication pin 208 inserted in the intermediate resin passage 207 and the intermediate member 200, The drive pin 211 attached to the base of the communication pin 208 via the connecting plates 209 and 210 and inserted into the intermediate member 200 and the intermediate hollow body 205, and the connecting plate.
The piston rod 212 is connected to 210, and the second intermediate receiving plate 20
3 and a hydraulic cylinder 213 installed in the second intermediate mold plate 204. And the communication pin 20
A reduced diameter portion is formed from the front end side to the proximal end side of 8 and this reduced diameter portion serves as a communication passage 214. Also, the above communication pin 2
08 is arranged so as to face the opening / closing pin 111 while maintaining a slight clearance when the mold is closed, and the intermediate side resin passage 207 is communicated and blocked by the tip end of the communication pin 208. Further, the drive pin 211 is brought into contact with the tip end surface of the interlocking pin 112 when the mold is closed.

上記可動型30は、可動型板300と図示されていない可
動受板及び可動取付板とを主体として構成されている。
そして、上記固定型板103と第1中間型板202との間及び
第2中間型板204と可動型板300との間には、それぞれ製
品用のキャビティが形成され、かつそれぞれ製品合わせ
面(パーティングライン)P.L.とされていると共に、上
記キャビティには、マニホールド200aの中間側樹脂通路
207を経て溶融樹脂が供給されるようになっている。
The movable die 30 is mainly composed of a movable die plate 300 and a movable receiving plate and a movable mounting plate (not shown).
Cavities for products are formed between the fixed mold plate 103 and the first intermediate mold plate 202 and between the second intermediate mold plate 204 and the movable mold plate 300, and the product matching surfaces ( Parting line) PL, and the cavity has a resin passage on the intermediate side of the manifold 200a.
The molten resin is supplied via 207.

上記のように構成された多重成形金型装置を用いて、
各キャビティ内に製品を成形する場合には、まず、固定
型10,中間型20及び可動型30間を互いに閉じた型締状態
において、油圧シリンダ213のピストンロッド212を前進
させ、連結板210,209を介して、連通ピン208及び駆動ピ
ン211を型開閉方向に(第1図と第2図において右方
に)移動させることにより、駆動ピン211に当接してい
る連動ピン112が固定取付板100側に押圧され、取付板10
8,109を介して開閉ピン111も、スプリング110の付勢力
に抗して固定取付板100側に移動する。これにより、今
まで開閉ピン111の先端部で閉塞されていた固定側樹脂
通路114が開放され、かつ今まで連通ピン208の先端部で
遮断されていた中間側樹脂通路207が連通されて、スプ
ルーブッシュ105に装着された射出成形機のノズルから
供給された溶融樹脂が、固定側樹脂通路114,連通ピン20
8の連通路214及び中間側樹脂通路207を経て、各中間受
板201,203,各中間型板202,204の内部を介して各キャビ
ティ内に充填される。
Using the multi-molding die apparatus configured as described above,
When molding a product in each cavity, first, in a mold clamping state in which the fixed mold 10, the intermediate mold 20, and the movable mold 30 are closed to each other, the piston rod 212 of the hydraulic cylinder 213 is advanced to connect the connecting plates 210, 209. By moving the communication pin 208 and the drive pin 211 in the mold opening / closing direction (to the right in FIGS. 1 and 2), the interlocking pin 112 abutting the drive pin 211 is fixed to the fixed mounting plate 100 side. Pressed by the mounting plate 10
The opening / closing pin 111 also moves toward the fixed mounting plate 100 side against the biasing force of the spring 110 via 8,109. As a result, the fixed-side resin passage 114, which has been closed at the tip of the opening / closing pin 111, is opened, and the intermediate-side resin passage 207, which has been blocked at the tip of the communication pin 208, is communicated with the sprue. The molten resin supplied from the nozzle of the injection molding machine mounted on the bush 105 is fixed to the fixed resin passage 114 and the communication pin 20.
After passing through the eight communication passages 214 and the intermediate-side resin passage 207, each cavity is filled through the inside of each intermediate receiving plate 201, 203 and each intermediate template 202, 204.

次いで、上記各キャビティ内への溶融樹脂の充填が完
了すると、油圧シリンダ213のピストンロッド212を後退
させて、連結板210,209を介して連通ピン208及び駆動ピ
ン211を可動型30側に移動させる。この結果、今まで駆
動ピン211によって固定取付板100側に押圧されていた連
動ピン112が、取付板108,109を介して、スプリング110
によって付勢されることにより、駆動ピン211とともに
可動型30側に移動する。このため、連動ピン112に取付
板108,109を介して取付けられた開閉ピン111も、連通ピ
ン208の移動に追従して移動する。これにより、開閉ピ
ン111の先端によって、固定側樹脂通路114の中間型20側
出口が閉塞され、かつ連通ピン208の先端によって、中
間側樹脂通路207の固定型10側入口が遮断される。この
状態において、各キャビティ内の製品が冷却固化した段
階で、固定型10,中間型20及び可動型30を互いに開くと
共に、上記製品を離型させて取り出す。この場合、型開
時には、開閉ピン111,連通ピン208によって各樹脂通路1
14,207が閉じられ、樹脂の漏洩が防止されると共に、固
定型10と中間型20との間に、各ピン111,112,208,211が
突出しないから、製品の離型,取り出しの障害になるこ
とがない。
Next, when the filling of the molten resin into each of the cavities is completed, the piston rod 212 of the hydraulic cylinder 213 is retracted, and the communication pin 208 and the drive pin 211 are moved to the movable die 30 side via the connecting plates 210 and 209. As a result, the interlocking pin 112, which has been pressed against the fixed mounting plate 100 side by the drive pin 211 until now, via the mounting plates 108 and 109, the spring 110
By being urged by, it moves to the movable die 30 side together with the drive pin 211. Therefore, the opening / closing pin 111 attached to the interlocking pin 112 via the attachment plates 108 and 109 also moves following the movement of the communication pin 208. As a result, the tip of the open / close pin 111 closes the outlet of the fixed resin passage 114 on the intermediate die 20 side, and the tip of the communication pin 208 blocks the inlet of the intermediate resin passage 207 on the fixed die 10 side. In this state, when the product in each cavity is cooled and solidified, the fixed mold 10, the intermediate mold 20, and the movable mold 30 are opened to each other, and the product is released and taken out. In this case, when the mold is opened, each resin passage 1 is opened by the open / close pin 111 and the communication pin 208.
Since 14,207 are closed to prevent leakage of the resin and the pins 111, 112, 208, 211 do not project between the fixed mold 10 and the intermediate mold 20, there is no obstacle to product release or removal.

なお、上記スプリング110の代わりに流体圧シリンダ
を設けてもよいが、固定中空体104内が高温になること
から、スプリング110を用いるのが望ましい。
A fluid pressure cylinder may be provided instead of the spring 110, but it is preferable to use the spring 110 because the temperature inside the fixed hollow body 104 becomes high.

〔発明の効果〕〔The invention's effect〕

以上説明したように、本発明は、固定型から中間型ま
での間に樹脂通路が形成され、上記中間型内の樹脂通路
に、連通路を有し、かつ上記固定型及び中間型の樹脂通
路を連通及び遮断する連通ピンが型開閉方向に移動自在
に設けられ、かつ上記固定型に、この固定型内の樹脂通
路を開放及び閉塞する開閉ピンが、上記連通ピンに対向
して型開閉方向に移動自在に設けられると共に、上記連
通ピンに平行に、この連通ピンを移動させる駆動ピンが
型開閉方向に設けられ、また、上記開閉ピンに平行に、
この開閉ピンを移動させる連動ピンが上記駆動ピンに対
向して型開閉方向に移動自在に設けられたものであるか
ら、上記駆動ピンによって、連通ピンと開閉ピンを固定
型側に移動させ、固定型及び中間型の樹脂通路を連通ピ
ンの連通路を介して連通させて樹脂を供給すると共に、
駆動ピンによって連通ピンを中間型に戻し、中間型の樹
脂通路を遮断し、かつ連動ピンによって開閉ピンを移動
させて固定型の樹脂通路を閉塞して型開を行うことによ
り、型開時に、従来のように大径のスプルーブッシュが
露出するようなことがなく、製品取り出しの障害となる
ようなものがない上に、極めて円滑にかつ確実に製品を
離型し、取り出すことができると共に、型締時にキャビ
ティに容易に樹脂を供給することができ、樹脂漏れ等の
不具合が生じることがない。
As described above, according to the present invention, the resin passage is formed between the fixed die and the intermediate die, the resin passage in the intermediate die has the communication passage, and the fixed and intermediate resin passages are provided. A communication pin that connects and disconnects the mold is provided movably in the mold opening and closing direction, and an opening and closing pin that opens and closes a resin passage in the fixed mold is provided in the mold in the mold opening and closing direction facing the communication pin. And a drive pin for moving the communication pin is provided in the mold opening / closing direction in parallel with the communication pin, and in parallel with the opening / closing pin.
Since the interlocking pin for moving the opening / closing pin is provided so as to be movable in the mold opening / closing direction facing the driving pin, the communication pin and the opening / closing pin are moved to the fixed mold side by the driving pin, and the fixed mold And the intermediate type resin passage is communicated through the communication passage of the communication pin to supply the resin,
By returning the communication pin to the intermediate mold by the drive pin, blocking the intermediate mold resin passage, and moving the open / close pin by the interlocking pin to close the fixed mold resin passage and perform mold opening, Unlike conventional sprue bushing, the sprue bush is not exposed, there is nothing that hinders product removal, and the product can be released and taken out very smoothly and reliably, and Resin can be easily supplied to the cavity during mold clamping, and problems such as resin leakage do not occur.

【図面の簡単な説明】[Brief description of the drawings]

第1図と第2図は本発明の一実施例を示すもので、第1
図は断面図、第2図は主要部の断面図である。 10…固定型、20…中間型、P.L.…製品合わせ面(パーテ
ィングライン)、111…開閉ピン、112…連動ピン、114
…固定側樹脂通路、207…中間側樹脂通路、208…連通ピ
ン、211…駆動ピン、214…連通路。
1 and 2 show an embodiment of the present invention.
The figure is a sectional view, and FIG. 2 is a sectional view of a main part. 10 ... Fixed type, 20 ... Intermediate type, PL ... Product mating surface (parting line), 111 ... Opening pin, 112 ... Interlocking pin, 114
... Fixed-side resin passage, 207 ... Intermediate-side resin passage, 208 ... Communication pin, 211 ... Drive pin, 214 ... Communication passage.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】複数の製品合わせ面を有し、かつこれらの
製品合わせ面をそれぞれ開いて製品を取り出すと共に、
固定型から中間型までの間に樹脂通路が形成されてなる
多重成形金型装置において、 上記中間型内の樹脂通路に、連通路を有し、かつ上記固
定型及び中間型の樹脂通路を連通及び遮断する連通ピン
が型開閉方向に移動自在に設けられ、かつ上記固定型
に、この固定型内の樹脂通路を開放及び閉塞する開閉ピ
ンが、上記連通ピンに対向して型開閉方向に移動自在に
設けられると共に、上記連通ピンに平行に、この連通ピ
ンを移動させる駆動ピンが型開閉方向に設けられ、ま
た、上記開閉ピンに平行に、この開閉ピンを移動させる
連動ピンが上記駆動ピンに対向して型開閉方向に移動自
在に設けられたことを特徴とする多重成形金型装置。
1. A plurality of product mating surfaces, each of which is opened to take out a product,
In a multi-molding die device in which a resin passage is formed between a fixed die and an intermediate die, a resin passage in the intermediate die has a communicating passage, and the resin passages of the fixed die and the intermediate die are communicated with each other. And a communication pin for shutting off is provided movably in the mold opening and closing direction, and an opening and closing pin for opening and closing the resin passage in the fixed mold moves in the mold opening and closing direction facing the communication pin. A drive pin that is freely provided and that moves the communication pin is provided parallel to the communication pin in the mold opening / closing direction, and an interlocking pin that moves the open / close pin parallel to the opening pin is the drive pin. A multi-molding die device, which is provided so as to be opposed to and movable in a mold opening / closing direction.
JP23012190A 1990-08-31 1990-08-31 Multiple mold equipment Expired - Fee Related JP2692358B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23012190A JP2692358B2 (en) 1990-08-31 1990-08-31 Multiple mold equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23012190A JP2692358B2 (en) 1990-08-31 1990-08-31 Multiple mold equipment

Publications (2)

Publication Number Publication Date
JPH04112018A JPH04112018A (en) 1992-04-14
JP2692358B2 true JP2692358B2 (en) 1997-12-17

Family

ID=16902898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23012190A Expired - Fee Related JP2692358B2 (en) 1990-08-31 1990-08-31 Multiple mold equipment

Country Status (1)

Country Link
JP (1) JP2692358B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7252501B2 (en) * 2005-02-16 2007-08-07 D-M-E Company Nozzle and apparatus for injection molding

Also Published As

Publication number Publication date
JPH04112018A (en) 1992-04-14

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