JPH0130612B2 - - Google Patents
Info
- Publication number
- JPH0130612B2 JPH0130612B2 JP55106266A JP10626680A JPH0130612B2 JP H0130612 B2 JPH0130612 B2 JP H0130612B2 JP 55106266 A JP55106266 A JP 55106266A JP 10626680 A JP10626680 A JP 10626680A JP H0130612 B2 JPH0130612 B2 JP H0130612B2
- Authority
- JP
- Japan
- Prior art keywords
- shaped shutter
- nozzle
- belt
- shutter
- injection unit
- 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
- 238000000465 moulding Methods 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims 1
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 206010013642 Drooling Diseases 0.000 description 1
- 208000008630 Sialorrhea Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/232—Feed stopping equipment comprising closing means disposed outside the nozzle
Description
【発明の詳細な説明】
本発明は射出成形機やロータリ成形機、Ｌ型成
形機などの成形機においてインジエクシヨン・ユ
ニツト後退のために可塑化時に起こる成形用樹脂
のいわゆる鼻たれ（drooling）を防止するための
装置に関し、その要旨とするところは前進後退自
在に設置されたインジエクシヨン・ユニツト１の
先端部に摺動自在な帯状シヤツタ２を掛け回し、
帯状シヤツタ２の両端に帯状シヤツタ２を往復駆
動するシリンダ７ａ，７ｂを配置し、帯状シヤツ
タ２にインジエクシヨン・ユニツト１先端のノズ
ル３と合致するノズル用孔４を穿孔し、帯状シヤ
ツタ２にクリーニング用ナイフ５ａ，５ｂを摺接
させて成ることを特徴とする成形機の鼻たれ防止
装置に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention prevents the so-called drooling of molding resin that occurs during plasticization due to regression of the injection unit in molding machines such as injection molding machines, rotary molding machines, and L-type molding machines. The gist of the device is that a slidable belt-shaped shutter 2 is hung around the tip of an injection unit 1 that is installed so as to be able to move forward and backward.
Cylinders 7a and 7b for reciprocating the belt-shaped shutter 2 are arranged at both ends of the belt-shaped shutter 2, and a nozzle hole 4 that matches the nozzle 3 at the tip of the injection unit 1 is bored in the belt-shaped shutter 2. This invention relates to a nasal drip prevention device for a molding machine characterized by having knives 5a and 5b in sliding contact.
従来、鼻たれを防止する方法としては、シヤツ
ト・オフ・ノズルを用いるものと蝶番式の遮閉板
を用いるものとがある。しかし、シヤツト・オ
フ・ノズルの場合には射出圧力の圧力損失を生
じ、また材料のやけを生じるという欠点がある。
特に硬質ポリ塩化ビニルの場合に、材料のやけが
問題となる。蝶番式の遮閉板の場合には中型、大
型の成形機に対しては遮閉力が小さく、鼻たれの
防止が不充分であり、またインジエクシヨン・ユ
ニツトの後退始めに鼻たれが起こるという欠点が
あつた。 Conventional methods for preventing nasal drip include methods using a shut-off nozzle and methods using a hinged shielding plate. However, in the case of a shut-off nozzle, there are disadvantages in that pressure loss in injection pressure occurs and material burns.
Particularly in the case of hard polyvinyl chloride, material damage is a problem. In the case of hinge-type shielding plates, the closing force is small for medium-sized and large-sized molding machines, and the prevention of nasal drip is insufficient, and the drawback is that nasal drip occurs when the injection unit begins to retreat. It was hot.
本発明は叙上の従来例の欠点に鑑みてなされた
ものであり、その目的とするところは叙上の従来
例の欠点を解消して鼻たれを完全に防止できる成
形機の鼻たれ防止装置を提供するにある。 The present invention has been made in view of the drawbacks of the above-mentioned conventional example, and its purpose is to provide a nasal drip prevention device for a molding machine that can eliminate the drawbacks of the above-mentioned conventional example and completely prevent nasal drip. is to provide.
以下本発明を添付図により詳述する。１は金型
部６に対して前進後退自在に設置されたインジエ
クシヨン・ユニツトであり、先端に成形用樹脂射
出用のノズル３が設けられている。２は帯状シヤ
ツタであり、両端を夫々シリンダ７ａ，７ｂに握
持されていてインジエクシヨン・ユニツト１の先
端部に上下方向に掛け回されている。８ａ，８ｂ
は１対のガイドピン、９ａ，９ｂは１対のガイド
ローラであり、ガイドピン８ａ，８ｂとガイドロ
ーラ９ａ，９ｂの中間においてインジエクシヨ
ン・ユニツト１から突設したクリーニング用ナイ
フ５ａ，５ｂの先端を帯状シヤツタ２に摺接させ
てある。また帯状シヤツタ２には、第２図のよう
にノズル３と合致するノズル用孔４を穿孔してあ
る。ノズル用孔４は１個でも良く、複数個でも良
い。しかして帯状シヤツタ２のノズル用孔４をノ
ズル３に一致させ、インジエクシヨン・ユニツト
１を前進させ、金型部６に成形用樹脂を注入する
ものであり、注入後シリンダ７ａ，７ｂを駆動し
て帯状シヤツタ２をノズル３に接触させたまま移
動させ、帯状シヤツタ２によりノズル３の成形用
樹脂を拭き取ると共に帯状シヤツタ２によりノズ
ル３を閉じ、インジエクシヨン・ユニツト１を後
退させる。帯状シヤツタ２により拭き取られた成
形用樹脂は帯状シヤツタ２に付着し、クリーニン
グ用ナイフ５ａ，５ｂにより落される。また帯状
シヤツタ２はガイドピン８ａ，８ｂを移動させて
ノズル３から離してから移動させても良い。帯状
シヤツタ２は皮、布、ステンレスのような金属板
等の材質で形成されるものであるが、背圧に耐え
るだけの強度があれば良い。また帯状シヤツタ２
だけでは背圧に耐えられない場合は、油圧駆動式
の遮閉板（図示せず）を設け、より確実なものと
することができる。本発明は主として射出成形機
において用いられるものであるが、ロータリ成形
機やＬ型成形機などのサイクル毎にインジエクシ
ヨン・ユニツト１の後退が必要な成形機に広く応
用されるものである。 The present invention will be explained in detail below with reference to the accompanying drawings. Reference numeral 1 denotes an injection unit installed so as to be able to move forward and backward with respect to the mold part 6, and a nozzle 3 for injecting molding resin is provided at the tip. Reference numeral 2 denotes a belt-shaped shutter, whose both ends are gripped by cylinders 7a and 7b, respectively, and are hung around the tip of the injection unit 1 in the vertical direction. 8a, 8b
9a and 9b are a pair of guide pins, and 9a and 9b are a pair of guide rollers. It is in sliding contact with the strip shutter 2. Further, the belt-shaped shutter 2 is provided with a nozzle hole 4 which matches the nozzle 3 as shown in FIG. The number of nozzle holes 4 may be one or more. Thus, the nozzle hole 4 of the strip shutter 2 is aligned with the nozzle 3, the injection unit 1 is advanced, and the molding resin is injected into the mold part 6. After injection, the cylinders 7a and 7b are driven. The belt-shaped shutter 2 is moved while being in contact with the nozzle 3, the molding resin of the nozzle 3 is wiped off by the belt-shaped shutter 2, the nozzle 3 is closed by the belt-shaped shutter 2, and the injection unit 1 is retreated. The molding resin wiped off by the strip-shaped shutter 2 adheres to the strip-shaped shutter 2 and is removed by the cleaning knives 5a, 5b. Alternatively, the strip shutter 2 may be moved after the guide pins 8a and 8b are moved to separate it from the nozzle 3. The belt-shaped shutter 2 is made of a material such as leather, cloth, or a metal plate such as stainless steel, as long as it has enough strength to withstand back pressure. In addition, the belt-shaped shutter 2
If this alone cannot withstand the back pressure, a hydraulically driven shielding plate (not shown) can be provided to make it more reliable. Although the present invention is mainly used in injection molding machines, it is widely applicable to molding machines such as rotary molding machines and L-shaped molding machines in which the injection unit 1 needs to be retracted every cycle.
本発明は叙上の如く前進後退自在に設置された
インジエクシヨン・ユニツトの先端部に摺動自在
な帯状シヤツタを掛け回し、帯状シヤツタの両端
に帯状シヤツタを往復駆動するシリンダを配置
し、帯状シヤツタにインジエクシヨン・ユニツト
先端のノズルと合致するノズル用孔を穿孔してあ
るから、帯状シヤツタをノズルに接触させて往復
駆動して摺動させることにより成形用樹脂を拭き
取ることやノズルを閉じることができ、可塑化時
にインジエクシヨン・ユニツト後退のために起こ
る鼻たれを完全に防止でき、しかもノズル用孔を
ノズルに合せることにより射出圧力の圧力損失が
生じず、またノズル先端付近のスペースを必要と
せず、特にポリ塩化ビニル等の熱安定性の悪い材
料にも材料のやけが起らないという利点がある。
更に帯状シヤツタにクリーニング用ナイフを摺接
させてあるから、帯状シヤツタに付着した成形用
樹脂をクリーニング用ナイフにより除去でき、帯
状シヤツタを度々掃除する必要がなく、連続使用
が可能になる利点がある。なお帯状シヤツタと油
圧駆動式の遮閉板を併用すれば、より一層中型及
び大型成形機に耐え得るものとなる。 As described above, a slidable belt-shaped shutter is hung around the tip of an injection unit that is installed to move forward and backward, and cylinders for reciprocating the belt-shaped shutter are arranged at both ends of the belt-shaped shutter. Since a hole for the nozzle is drilled to match the nozzle at the tip of the injection unit, by bringing the strip shutter into contact with the nozzle and sliding it back and forth, the molding resin can be wiped off and the nozzle can be closed. It is possible to completely prevent the nose droop that occurs due to the retreat of the injection unit during plasticization, and by aligning the nozzle hole with the nozzle, there is no loss of injection pressure, and there is no need for space near the nozzle tip. Even materials with poor thermal stability, such as polyvinyl chloride, have the advantage of not causing material burn.
Furthermore, since the cleaning knife is in sliding contact with the strip-shaped shutter, the molding resin adhering to the strip-shaped shutter can be removed by the cleaning knife, and there is no need to frequently clean the strip-shaped shutter, which has the advantage of allowing continuous use. . If a belt-shaped shutter and a hydraulically driven shielding plate are used together, it will be able to withstand medium- and large-sized molding machines even more.
第１図は本発明の一実施例を示す断面図、第２
図は同上の帯状シヤツタの正面図である。
１……インジエクシヨン・ユニツト、２……帯
状シヤツタ、３……ノズル、４……ノズル用孔、
５ａ，５ｂ……クリーニング用ナイフ。
FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a front view of the belt-shaped shutter same as above. 1... Injection unit, 2... Strip shutter, 3... Nozzle, 4... Nozzle hole,
5a, 5b...Cleaning knife.
Claims (1)
ン・ユニツトの先端部に摺動自在な帯状シヤツタ
を掛け回し、帯状シヤツタの両端に帯状シヤツタ
を往復駆動するシリンダを配置し、帯状シヤツタ
にインジエクシヨン・ユニツト先端のノズルに合
致するノズル用孔を穿孔し、帯状シヤツタにクリ
ーニング用ナイフを摺接させて成ることを特徴と
する成形機の鼻たれ防止装置。1. A slidable belt-shaped shutter is hung around the tip of the injection unit that is installed to move forward and backward, cylinders for reciprocating the belt-shaped shutter are arranged at both ends of the ribbon-shaped shutter, and the nozzle at the tip of the injection-extraction unit is attached to the ribbon-shaped shutter. 1. A nose droop prevention device for a molding machine, characterized in that a nozzle hole matching the above is bored, and a cleaning knife is brought into sliding contact with a belt-shaped shutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10626680A JPS5731545A (en) | 1980-07-31 | 1980-07-31 | Spilling preventor for molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10626680A JPS5731545A (en) | 1980-07-31 | 1980-07-31 | Spilling preventor for molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5731545A JPS5731545A (en) | 1982-02-20 |
| JPH0130612B2 true JPH0130612B2 (en) | 1989-06-21 |
Family
ID=14429278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10626680A Granted JPS5731545A (en) | 1980-07-31 | 1980-07-31 | Spilling preventor for molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5731545A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742321Y2 (en) * | 1991-03-22 | 1995-10-04 | 有限会社タイシ | Breathable shoes |
| US6056536A (en) * | 1997-03-20 | 2000-05-02 | Husky Injection Molding Systems Ltd. | Valve gating apparatus for injection molding |
| JP5073246B2 (en) * | 2006-08-29 | 2012-11-14 | 株式会社ブリヂストン | Injection molding machine |
-
1980
- 1980-07-31 JP JP10626680A patent/JPS5731545A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5731545A (en) | 1982-02-20 |
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