JPS61263720A - Anti-drooling device - Google Patents
Anti-drooling deviceInfo
- Publication number
- JPS61263720A JPS61263720A JP10567685A JP10567685A JPS61263720A JP S61263720 A JPS61263720 A JP S61263720A JP 10567685 A JP10567685 A JP 10567685A JP 10567685 A JP10567685 A JP 10567685A JP S61263720 A JPS61263720 A JP S61263720A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- mold
- sprue bushing
- drooling
- opening
- 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
Links
- 206010013642 Drooling Diseases 0.000 title claims abstract description 22
- 208000008630 Sialorrhea Diseases 0.000 title claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 238000000465 moulding Methods 0.000 claims description 26
- 230000002265 prevention Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 108091092889 HOTTIP Proteins 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
- B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
-
- 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
- B29C45/28—Closure devices therefor
- B29C45/2803—Closure devices therefor comprising a member with an opening or the injection nozzle movable into or out of alignment with the sprue channel or mould gate
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)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はドルーリング防止装置に関する。更に詳しくは
、金型のホットスプルーブッシングに成形機のノズルを
押し付けて成形するタイプのスタックモールドにおいて
型開閉時のホットスプルーブッシングの移動を利用し、
金型固定部に取付けたテーパーガイドとホットスプルー
ブッシングに設けたバルブにより溶融樹脂の流路を開閉
可能とすることによりドルーリングを防止する装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an anti-druling device. More specifically, in stack molding, which is a type of stack molding in which the nozzle of the molding machine is pressed against the hot sprue bushing of the mold, the movement of the hot sprue bushing when the mold is opened and closed is utilized.
This invention relates to a device that prevents drooling by opening and closing a flow path for molten resin using a taper guide attached to a mold fixing part and a valve provided on a hot sprue bushing.
本発明のドルーリング防止装置に関する従来技術を、以
下に第１〜３図を参照しつつ説明する。The prior art related to the drooling prevention device of the present invention will be described below with reference to FIGS. 1 to 3.
第１図はスタックモールドの型閉時に金型のホットスプ
ルーブッシング２が成形機のノズル１に押し付けられ成
形機から溶融樹脂を射出できる状態を示す断面図である
。射出された溶融樹脂はヒーターにて加熱されているホ
ットスプループフシ゛／グ２の溶融樹脂流路３、ホット
ランナ−のマニホールドブロック４中の流路およびホッ
トチップ５を通ってキャビティ内に流入し保圧される。FIG. 1 is a cross-sectional view showing a state in which the hot sprue bushing 2 of the mold is pressed against the nozzle 1 of the molding machine and molten resin can be injected from the molding machine when the stack mold is closed. The injected molten resin flows into the cavity through the molten resin flow path 3 of the hot sprue frame 2 heated by a heater, the flow path in the manifold block 4 of the hot runner, and the hot tip 5. Pressure is held.
キャビティ内の樹脂は冷却、固化後成形品として取出す
ため第２図の如（金型が開かれる。スタックモールドの
場合、一般にランナーレスで成形されるため製品のみが
取出されるが取出しは型開された金型のすき間２ケ所（
第２図のＤおよびＥ）から行う。従って金型を型開する
時は第２図のＡ群は固定されＢ。After the resin in the cavity is cooled and solidified, the mold is opened to take it out as a molded product, as shown in Figure 2.In the case of a stack mold, only the product is taken out because it is generally molded without a runner, but the mold is taken out after the mold is opened. There are two gaps in the mold (
Perform from D and E in Figure 2. Therefore, when the mold is opened, group A in Figure 2 is fixed.
０群が成形機の型開動作により移動する。この場合、マ
ニホールドブロック４につながっているホットスプルー
ブッシング２も移動するため第２図に示した如くホット
スプルーブッシング２は成形機のノズル１から離れる。Group 0 is moved by the mold opening operation of the molding machine. In this case, since the hot sprue bushing 2 connected to the manifold block 4 also moves, the hot sprue bushing 2 separates from the nozzle 1 of the molding machine as shown in FIG.
この時ホットスプルーブッシング２からホットチップ５
に至る流路の溶融樹脂の一部がその残存圧力によりホッ
トスプルーブッシング２のノズルタッチ側からドルーリ
ングする。ドルーリングが発生すると固化した樹脂がホ
ットスプルーブッシングの作動を悪くするのみならず材
料樹脂の損失となり好ましくない。At this time, hot sprue bushing 2 to hot tip 5
A portion of the molten resin in the flow path leading to the hot sprue bushing 2 drools from the nozzle touch side of the hot sprue bushing 2 due to its residual pressure. When drooling occurs, the solidified resin not only impairs the operation of the hot sprue bushing, but also causes loss of resin material, which is undesirable.
特に成形サイクル毎にドルーリングが発生するので、−
回毎の樹脂損失は微量といえど長期的に見れば、そのロ
スは多大なものとなる。Especially since drooling occurs every molding cycle, -
Although the resin loss each time is small, in the long run, the loss becomes enormous.
この場合、材料樹脂の損失をやむなしとして何らドルー
リング防止対策を施さないこともあるが、従来より次の
方法がとられることが多い。In this case, there are cases in which no measures are taken to prevent drooling due to the loss of the material resin, but the following method is conventionally often used.
一つは、型開閉に従って射出成形機の射出シリンダーユ
ニットを追従させ、たえずホットスプルーブッシングか
らノズルが離れないようにしてドルーリングを防ぐ方法
である。しかしながらこの方法は成形機の改造が必要で
あり、又追従速度を速くできないため型開閉速度を遅く
する必要があり、成形サイクルが長くなるという欠点が
あった。One method is to prevent drooling by causing the injection cylinder unit of the injection molding machine to follow the opening and closing of the mold so that the nozzle never leaves the hot sprue bushing. However, this method requires modification of the molding machine, and since the follow-up speed cannot be increased, the mold opening/closing speed must be slowed down, resulting in a longer molding cycle.
又、第３図に示すようにホットスプルーブッシング２を
省略してその分成形機のノズル１を延長しバルブ付きと
する一方マニホールドブロック４側にも油圧やスプリン
グで作動するニードルバルブ７を設け、成形機の動作に
合わせて樹脂の射出時にバルブを開放し、ノズルタッチ
が離れる型開き時にバルブを閉止してドルーリングを防
止する方法もある。しかしこの方法は金型構造が複雑に
なるため金型のメンテナンスに難があった。Further, as shown in FIG. 3, the hot sprue bushing 2 is omitted, and the nozzle 1 of the molding machine is extended accordingly, and a valve is provided, while a needle valve 7 operated by hydraulic pressure or a spring is provided on the manifold block 4 side. Another method is to prevent drooling by opening the valve when the resin is injected in accordance with the operation of the molding machine, and closing the valve when the mold opens when the nozzle touch leaves. However, this method requires maintenance of the mold because the mold structure is complicated.
そこで本発明者等は、従来のドルーリング防止方法の欠
点に鑑み、構造が簡単で取扱いが容易であり、確実にド
ルーリングの発生を防止できる装置につき鋭意研究を行
った結果、本発明を完成した。Therefore, in view of the shortcomings of conventional methods for preventing drooling, the present inventors conducted intensive research into a device that has a simple structure, is easy to handle, and can reliably prevent the occurrence of drooling, and as a result, they completed the present invention. did.
即ち本発明は、スタックモールドにおいて、樹脂金型の
ホットスプルーブッシングの成形機ノズルタッチ側先端
付近に設けた溶融樹脂流路開閉用バルブとそのバルブを
開閉させるために金型の型開閉ストロークの中で樹脂流
路を閉止又は開放できる角度を持ったテーパーガイドか
ら構成され、型開時にはホットスプルーブッシングの樹
脂流路を閉止し、型閉時には流路を開放する様にしたこ
とを特徴とするドルーリング防止装置を提供せんとする
ものである。That is, in stack molding, the present invention provides a molten resin flow path opening/closing valve provided near the tip of the molding machine nozzle touch side of the hot sprue bushing of the resin mold, and a molten resin flow path opening/closing valve provided in the mold opening/closing stroke of the mold to open/close the valve. The drue is composed of a tapered guide with an angle that allows the resin flow path to be closed or opened, and the resin flow path of the hot sprue bushing is closed when the mold is opened, and the flow path is opened when the mold is closed. It is an object of the present invention to provide a ring prevention device.
以下に第４〜７図を参照しつつ、本発明のドルーリング
防止装置の一例を示し説明する。An example of the drooling prevention device of the present invention will be shown and explained below with reference to FIGS. 4 to 7.
ここで、第４図は成形機ノズル側から見たホットスプル
ーブッシングを示し、第５図は第４図のＡ−Ａ断面図で
、又第６図はＢ−Ｂ断面図である。Here, FIG. 4 shows the hot sprue bushing as seen from the molding machine nozzle side, FIG. 5 is a sectional view taken along line AA in FIG. 4, and FIG. 6 is a sectional view taken along line BB.
本装置は、ホットスプルーブッシング２の成形機ノズル
タッチ側先端付近に溶融樹脂流路を開閉するためのバル
ブを有する。This device has a valve near the tip of the hot sprue bushing 2 on the molding machine nozzle touch side for opening and closing the molten resin flow path.
バルブ９は流路開閉用のバルブ開閉子９１ａを有し、開
閉子９１ａの軸方向長さは樹脂流路３ｂの直径よりも大
きくなるよう形成されている。The valve 9 has a valve switch 91a for opening and closing the flow path, and the length of the switch 91a in the axial direction is formed to be larger than the diameter of the resin flow path 3b.
又、バルブ９の夫々の一端にはバルブ摺動子ｌＯａ、１
０ｂが設けられている。Further, a valve slider lOa, 1 is provided at one end of each of the valves 9.
0b is provided.
一方、金型固定側取付板６には、テーパーガイド３ａ、
１３ｂが取付けられている。On the other hand, the mold fixed side mounting plate 6 includes a taper guide 3a,
13b is attached.
テーパーガイド＄ａ、８ｂには、前記バルブ９の摺動子
１０ａ、１０ｂが摺動可能に接しており、金型の開閉、
換言すれば、ホットスプルーブッシング２の移動に伴い
摺動子１０ａ、１０ｂが摺動しバルブ開閉子９１ａが流
路を開閉するように一定の角度が設けられている。The sliders 10a and 10b of the valve 9 are in slidable contact with the taper guides $a and 8b, and are used to open and close the mold.
In other words, a certain angle is provided so that as the hot sprue bushing 2 moves, the sliders 10a and 10b slide and the valve switch 91a opens and closes the flow path.
第５図、第６図は、第１図で示したと同様に金型が閉じ
、成形機のノズルがホットスプルーブッシング２に押し
付けられた状態を示しておリ、溶融樹脂の流路３ａと３
ｂはバルブ開閉子９１ａにより遮断されることな（相違
通している。5 and 6 show a state in which the mold is closed and the nozzle of the molding machine is pressed against the hot sprue bushing 2 in the same way as shown in FIG.
b is not shut off by the valve switch 91a.
斯かる状態でノズルから溶融樹脂を金型内に流入し、固
化させて製品が作られる。そして型開きを行い製品を取
出すときにホットランナ−のマニホールドブロックに固
定されたホットスプルーブッシング２は成形機ノズルか
ら離れる。In this state, the molten resin flows into the mold from the nozzle and is solidified to produce a product. When the mold is opened and the product is taken out, the hot sprue bushing 2 fixed to the manifold block of the hot runner separates from the nozzle of the molding machine.
即ち、第５図で言えば、ホットスプルーブッシング２は
右方向に移動する。That is, in FIG. 5, the hot sprue bushing 2 moves to the right.
ホットスプルーブッシング２の右方向の移動に従い、バ
ルブ摺動子ＩＱａ、１０ｂはテーパーガイド８ａ、８ｂ
に沿って摺動し、バルブ９の開閉子９１ａを押し下げ、
第７図に示すように、流路３ａと３ｂを遮断する。As the hot sprue bushing 2 moves to the right, the valve sliders IQa, 10b move toward the tapered guides 8a, 8b.
, and push down the opening/closing element 91a of the valve 9.
As shown in FIG. 7, flow paths 3a and 3b are blocked.
従ってホットスプルーブッシングの先端部に設けたノズ
ルタッチピース１１への射出成形機ノズルの押付けがな
くなっても溶融樹脂の流路からのドルーリングを防止す
ることができる。Therefore, even if the injection molding machine nozzle is no longer pressed against the nozzle touch piece 11 provided at the tip of the hot sprue bushing, drooling from the flow path of the molten resin can be prevented.
尚、流路３ａ、３ｂの樹脂が固化した状態で金型を開く
場合にはテーパーガイドをはずせば良い。Note that when opening the mold with the resin in the channels 3a and 3b solidified, the taper guide may be removed.
又、前述の第３図に示した従来方法では金型を成形機か
ら降し、金型を分解しないとメンテナンスできないのに
比べ、本装置においてはバルブ部分に不具合が生じた場
合でもホットスプルーブッシングからバルブ部分を簡単
に取りはずすことが可能であり、金型を成形機に取り付
けたままでもこの作業が容易に出来るという利点を有す
る。In addition, with the conventional method shown in Figure 3 above, maintenance is not possible without removing the mold from the molding machine and disassembling the mold, but with this device, even if a problem occurs in the valve part, hot sprue bushings can be removed. It has the advantage that the valve part can be easily removed from the molding machine, and this work can be done easily even when the mold is attached to the molding machine.
以上述べたように本発明は構造が簡単で安価であり、し
かも取扱いも容易な装置で、ドルーリングの発生を確実
に防止し、ドルーリングによる樹脂の損失を防ぐことを
可能とした。As described above, the present invention is a device that is simple in structure, inexpensive, and easy to handle, making it possible to reliably prevent the occurrence of drooling and prevent loss of resin due to drooling.
（実施例１）
溶融樹脂流路直径６１１ｍ、バルブ開閉子流路直径６ｎ
および型開ストローク７６鶴でバルブ摺動子が７ｆｉ作
動するように勾配を決めたテーパーガイドをもつ本発明
によるドルーリング防止装置を設け１ショット１２０ｇ
の８ヶ取りスタックモールドを使用し、型開閉ストロー
ク４００日型開閉時間５秒にてアセタール樹脂を成形し
た場合のドルーリングによる樹脂の損失は１０００シヨ
ツトあたりＯｇであった。(Example 1) Molten resin flow path diameter 611 m, valve switch flow path diameter 6 n
And, a drooling prevention device according to the present invention having a tapered guide with a slope determined so that the valve slider operates 7fi with a mold opening stroke of 76g is installed, and one shot weighs 120g.
When acetal resin was molded using an 8-cavity stack mold with a mold opening/closing stroke of 400 days and a mold opening/closing time of 5 seconds, the loss of resin due to drooling was Og per 1000 shots.
（比較例１）
実施例１に示した金型で本発明のドルーリング防止装置
を設けなかった場合は１０００シヨツト当たり１０１０
ｇのドルーリングによる樹脂の損失があった。(Comparative Example 1) When the mold shown in Example 1 was not provided with the drooling prevention device of the present invention, the molding rate was 1010 per 1000 shots.
There was a loss of resin due to drooling of g.
尚、型開閉時間が５秒より長くなると比較例１における
ドルーリング量は更に多くなると思われる。Note that when the mold opening/closing time is longer than 5 seconds, the amount of drooling in Comparative Example 1 seems to increase further.
第１図はスタックモールドの型閉時の状態を示す略示断
面図、第２図はスタックモールドの型開時の状態を示す
略示断面図、第３図は従来のドルーリング防止装置の一
例を示す略示断面図、第４図は成形機ノズル側から見た
零ドルーリング防止装置のホットスプルーブッシングを
示す図、第５図は第４図のＡ−Ａ断面図、第６図は第４
図のＢ−Ｂ断面図、第７図はホットスプルーブッシング
がノズルから離れ、樹脂流路が閉じたときの状態を示す
図である。
１・・・・・・・・・・・・成形機ノズル２・・・・・
・・・・・・・ホットスプルーブッシング３．３ａ、３
ｂ ＋＋＋溶融樹脂流路
４・・・・・・・・・・・・マニホールドブロック５・
・・・・・・・・・・・ホットチップ６・・・・・・・
・・・・・金型固定側取付板７・・・・・・・・・・・
・油圧式ニードルバルブ８ａ、 ８ｂ・・・・・・テー
パーガイド９…・・・…・・・バルブFig. 1 is a schematic sectional view showing the state of the stack mold when the mold is closed, Fig. 2 is a schematic sectional view showing the state of the stack mold when the mold is open, and Fig. 3 is an example of a conventional drool ring prevention device. 4 is a diagram showing the hot sprue bushing of the zero drool ring prevention device as seen from the nozzle side of the molding machine, FIG. 5 is a sectional view taken along line A-A in FIG. 4, and FIG. 4
FIG. 7 is a sectional view taken along the line BB in the figure, and shows the state when the hot sprue bushing is separated from the nozzle and the resin flow path is closed. 1......Molding machine nozzle 2...
・・・・・・Hot sprue bushing 3.3a, 3
b +++ Molten resin flow path 4... Manifold block 5.
・・・・・・・・・・・・Hot Chip 6・・・・・・・・・
・・・・・・Mold fixed side mounting plate 7・・・・・・・・・・・・
・Hydraulic needle valve 8a, 8b...Taper guide 9...Valve
Claims (1)
ブッシングの成形機ノズルタッチ側先端付近に設けた溶
融樹脂流路開閉用バルブとそのバルブを開閉させるため
に金型の型開閉ストロークの中で樹脂流路を閉止又は開
放できる角度を持ったテーパーガイドから構成され、型
開時にはホットスプルーブッシングの樹脂流路を閉止し
、型閉時には流路を開放する様にしたことを特徴とする
ドルーリング防止装置。In stack molding, a valve for opening and closing the molten resin flow path is installed near the tip of the molding machine nozzle touch side of the hot sprue bushing of the resin mold, and in order to open and close the valve, the resin flow path is opened and closed during the mold opening and closing stroke of the mold. A drooling prevention device comprising a tapered guide with an angle that can be closed or opened, and closing the resin flow path of a hot sprue bushing when the mold is opened, and opening the flow path when the mold is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10567685A JPS61263720A (en) | 1985-05-17 | 1985-05-17 | Anti-drooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10567685A JPS61263720A (en) | 1985-05-17 | 1985-05-17 | Anti-drooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61263720A true JPS61263720A (en) | 1986-11-21 |
| JPH053810B2 JPH053810B2 (en) | 1993-01-18 |
Family
ID=14414033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10567685A Granted JPS61263720A (en) | 1985-05-17 | 1985-05-17 | Anti-drooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61263720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0975459A1 (en) * | 1997-08-25 | 2000-02-02 | Donald G. Harrison | Molding thermosetting polymers onto substrates |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5472262A (en) * | 1977-11-21 | 1979-06-09 | Asahi Chem Ind Co Ltd | Hot runner mold |
| JPS565746A (en) * | 1979-06-27 | 1981-01-21 | Asahi Chem Ind Co Ltd | Hot runner mold for injection molding |
| JPS5869425U (en) * | 1981-11-01 | 1983-05-11 | 寺嶋 勝巳 | Nozzle body for preventing leakage of retained material in injection molding |
-
1985
- 1985-05-17 JP JP10567685A patent/JPS61263720A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5472262A (en) * | 1977-11-21 | 1979-06-09 | Asahi Chem Ind Co Ltd | Hot runner mold |
| JPS565746A (en) * | 1979-06-27 | 1981-01-21 | Asahi Chem Ind Co Ltd | Hot runner mold for injection molding |
| JPS5869425U (en) * | 1981-11-01 | 1983-05-11 | 寺嶋 勝巳 | Nozzle body for preventing leakage of retained material in injection molding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0975459A1 (en) * | 1997-08-25 | 2000-02-02 | Donald G. Harrison | Molding thermosetting polymers onto substrates |
| EP0975459A4 (en) * | 1997-08-25 | 2006-05-24 | Products Inc Ubertech | Molding thermosetting polymers onto substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH053810B2 (en) | 1993-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |