JPH0348013B2 - - Google Patents
Info
- Publication number
- JPH0348013B2 JPH0348013B2 JP4055486A JP4055486A JPH0348013B2 JP H0348013 B2 JPH0348013 B2 JP H0348013B2 JP 4055486 A JP4055486 A JP 4055486A JP 4055486 A JP4055486 A JP 4055486A JP H0348013 B2 JPH0348013 B2 JP H0348013B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- injection molding
- venting
- molding machine
- resin
- 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
- 238000013022 venting Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011800 void material Substances 0.000 claims 2
- 239000000463 material Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 ＜発明の属する技術分野＞ 本発明は射出成形機のベント方法に関する。[Detailed description of the invention] <Technical field to which the invention pertains> The present invention relates to a method for venting an injection molding machine.
＜従来技術とその欠点＞
従来の射出成形機のベント方法は、第１図に示
すように材料供給口１からノズル２に向い順に供
給部３、圧縮部４、計量部５から成る第１ステー
ジＡとこれに直列に連結する同構成から成る第２
ステージＢにより構成されたスクリユ１０を用い
第１ステージＡの終了した第２ステージ供給部６
の樹脂圧力が解放される位置にベントポート７を
設け、発生する揮発分や水分等（以下ガス等とい
う）を排出していた。<Prior art and its drawbacks> As shown in FIG. 1, the conventional injection molding machine venting method consists of a first stage consisting of a supply section 3, a compression section 4, and a metering section 5 in order from a material supply port 1 to a nozzle 2. A and a second part consisting of the same structure connected in series to this
The second stage supply section 6 where the first stage A has been completed using the screw 10 configured by the stage B
A vent port 7 is provided at a position where the resin pressure is released, and volatile matter, moisture, etc. (hereinafter referred to as gas, etc.) generated are discharged.
しかしながら、ベントアツプの発生を防ぐた
め、材料供給口１から供給されるペレツトやパウ
ダーの材料樹脂はフイーダ装置８により送り量を
調整する必要から、フイーダスクリユ９の回転数
の変更、機械本体との同調制御等が複雑で操作性
が悪かつた。 However, in order to prevent the occurrence of vent-up, it is necessary to adjust the feed rate of the material resin of pellets and powder supplied from the material supply port 1 using the feeder device 8. etc. were complicated and difficult to operate.
さらに、色替え、材料替えの際にはベントポー
ト７を塞ぎベントポート内に材料樹脂が滞留しな
いようにする必要があつた。また、スクリユ及び
バレルは標準機のノンベント形と比べ全長が長
く、機械全体が大形となるばかりでなく、標準機
との互換性がなく、機械装置全体の価格も高くな
る欠点もあつた。 Furthermore, when changing colors or materials, it was necessary to close the vent port 7 to prevent the material resin from staying inside the vent port. Additionally, the overall length of the screw and barrel was longer than that of the non-bent type of the standard machine, which not only made the machine larger as a whole, but also had the disadvantage of not being compatible with the standard machine, and increasing the price of the entire machine.
＜発明の目的＞
本発明は従来の射出成形機におけるベント方法
にあつた欠点を取除きベント専用のスクリユやバ
レルを用いない標準機であつてもベントが出来る
射出成形機のベント方法を提供することにある。<Object of the invention> The present invention provides a venting method for an injection molding machine that eliminates the drawbacks of conventional venting methods for injection molding machines and allows venting even in standard machines that do not use a screw or barrel dedicated to venting. There is a particular thing.
＜発明の概要＞
前述の目的を達成するため射出成形機のベント
方法であつて、計量工程を行うに際し、予め定め
られた計量樹脂分だけスクリユを後退させ、スク
リユ先端前面に空隙部を形成し、次いでスクリユ
後退限でスクリユを回転させ、前記空隙部に溶融
樹脂を計量するとともに、空隙部に溜るガス等を
排出するようにしたことを特徴とする射出成形機
におけるベント方式とした。<Summary of the invention> In order to achieve the above-mentioned object, a method for venting an injection molding machine is provided, in which a screw is retreated by a predetermined amount of resin to be measured when performing a metering process, and a gap is formed in front of the tip of the screw. Then, the screw is rotated at the backward limit of the screw, and the molten resin is metered into the gap, and gas, etc. accumulated in the gap is discharged.This is a vent system for an injection molding machine.
＜作用効果＞
以上説明したように、計量に際しバレル内に形
成された空隙内に溶融樹脂を送り込むので、この
空隙内から例へばノズル孔等からガス等を排出す
ることが出来、従来のバレルにベント孔を設け、
ベント専用のスクリユを用いる必要もなく標準機
を使用することが出来るので、フイダー装置も不
用となり、操作性及び価格面でも有利となり、当
初に掲げた欠点は取除かれる。<Effects> As explained above, since molten resin is sent into the gap formed in the barrel during metering, gas, etc. can be discharged from the gap through the nozzle hole, etc. Make a hole,
Since there is no need to use a screw exclusively for venting and a standard machine can be used, a feeder device is also unnecessary, which is advantageous in terms of operability and cost, and the drawbacks listed at the beginning are eliminated.
第１図は従来方法の説明図。 FIG. 1 is an explanatory diagram of a conventional method.
Claims (1)
を行うに際し、予め定められた計量樹脂分だけス
クリユを後退させ、スクリユ先端前面に空隙部を
形成し、次いでスクリユ後退限でスクリユを回転
させ、前記空隙部に溶融樹脂を計量するととも
に、空隙部に溜るガス等を排出するようにしたこ
とを特徴とする射出成形機におけるベント方法。1. A venting method for an injection molding machine, in which, when performing the measuring process, the screw is moved back by a predetermined amount of resin to be measured, a gap is formed in front of the tip of the screw, and then the screw is rotated at the screw retraction limit, A venting method for an injection molding machine, characterized in that molten resin is metered into the void and gas, etc. accumulated in the void is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4055486A JPS62198427A (en) | 1986-02-26 | 1986-02-26 | Venting method in injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4055486A JPS62198427A (en) | 1986-02-26 | 1986-02-26 | Venting method in injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62198427A JPS62198427A (en) | 1987-09-02 |
| JPH0348013B2 true JPH0348013B2 (en) | 1991-07-23 |
Family
ID=12583665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4055486A Granted JPS62198427A (en) | 1986-02-26 | 1986-02-26 | Venting method in injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62198427A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6728462B1 (en) * | 2019-10-30 | 2020-07-22 | 株式会社ソディック | Injection device |
-
1986
- 1986-02-26 JP JP4055486A patent/JPS62198427A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62198427A (en) | 1987-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |