JPS609892B2 - How to change resin - Google Patents
How to change resinInfo
- Publication number
- JPS609892B2 JPS609892B2 JP54013995A JP1399579A JPS609892B2 JP S609892 B2 JPS609892 B2 JP S609892B2 JP 54013995 A JP54013995 A JP 54013995A JP 1399579 A JP1399579 A JP 1399579A JP S609892 B2 JPS609892 B2 JP S609892B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- pent
- hole
- plug
- cylinder
- 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
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
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
ペント式射出成形機は、スクリュ中間部より溶融樹脂中
のガス分を抽出して射出成形するもので、従来より公知
のものである。DETAILED DESCRIPTION OF THE INVENTION A pent-type injection molding machine performs injection molding by extracting gas from a molten resin from an intermediate portion of a screw, and is a conventionally known machine.
射出成形機では一般に度々金型が取替えられ、そして成
形する製品が変更されることが多い。またこの時樹脂の
種類の変更が伴ったり、色が変ったりすることがあるた
め、これらの場合には以前使用していた樹脂を完全に取
り除き、新しい樹脂と置き替える必要が生じる。従来は
この場合、単に使用中樹脂のホルッべへの供給を止め、
スクリュ溝とシリンダ内に残存する樹脂を、空運転を続
けて出釆るだけ吐出させ、その後変更したい樹脂を供給
し、あたかも洗い流すようにして樹脂替えを行なってい
た。In an injection molding machine, the mold is generally replaced frequently, and the product to be molded is often changed. Also, at this time, the type of resin may be changed or the color may change, so in these cases it is necessary to completely remove the previously used resin and replace it with a new resin. Conventionally, in this case, the supply of the resin being used to Holubbe was simply stopped, and
The resin remaining in the screw groove and cylinder was discharged as much as possible by continuing idle operation, and then the resin to be changed was supplied, and the resin was changed as if it were being washed away.
しかしペント式射出成形機ではスクリュ形状の特殊性と
、ベント孔の存在により、残留樹脂の置き替りが悪く、
この樹脂替えに長時間を要するばかりでなく、この間に
樹脂が多量に無駄になる欠点があった。However, in pent-type injection molding machines, due to the unique shape of the screw and the presence of vent holes, it is difficult to replace residual resin.
Not only does it take a long time to change the resin, but a large amount of resin is wasted during this time.
本発明は前記従来の欠点を解消するために提案されたも
ので、ベント式射出成形機又はペント式押出機に於いて
、樹脂替え時ペント孔を一時的に樹脂替プラグで閉塞し
、同プラグのリード孔より一部の溶融樹脂を漏洩させつ
つ、シリンダ内部は高圧状態として樹脂替えを行なうよ
うにした方法を提供せんとするものである。The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and in a vent-type injection molding machine or a pent-type extruder, the pent hole is temporarily blocked with a resin replacement plug when changing the resin. It is an object of the present invention to provide a method in which a part of the molten resin leaks from the lead hole of the cylinder while the resin is replaced while the inside of the cylinder is kept in a high pressure state.
以下図面の実施例により本発明を説明すると、図に於い
て１はシリンダ、ｌａはスクリュ、２はシリンダ１に設
けられたフランジである。The present invention will be described below with reference to the embodiments shown in the drawings. In the drawings, 1 is a cylinder, la is a screw, and 2 is a flange provided on the cylinder 1.
３はペントプラグで、複数本のボルト４でフランジ２に
取り付けられており、ベント孔５が設けられている。A pent plug 3 is attached to the flange 2 with a plurality of bolts 4, and is provided with a vent hole 5.
６はペントケースでフランジ２に取付けれている。6 is a pent case attached to flange 2.
７はペントケース６に設けられているガス抽出口、８は
蓋、９はスクリュｌａの先端部に設けられたりングバル
ブ、１０は原料ホツパ、１１はフィーダである。7 is a gas extraction port provided in the pent case 6, 8 is a lid, 9 is a running valve provided at the tip of the screw la, 10 is a raw material hopper, and 11 is a feeder.
１２は樹脂替プラグで、複数本のボルト１３によりペン
トケース６を取り去った後のペントプラグ３に取付けら
れるようになっている。Reference numeral 12 denotes a resin replacement plug, which can be attached to the pent plug 3 after removing the pent case 6 with a plurality of bolts 13.
１４は樹脂替プラグ１２のブリード孔、１５はブリード
孔１４よりの樹脂漏れ量調整ネジである。14 is a bleed hole of the resin replacement plug 12, and 15 is a screw for adjusting the amount of resin leakage from the bleed hole 14.
次に作用を説明すると、第１図でホッパ１川こ投入され
た原料樹脂はフィーダ１ １よりスクリュｌａに供給さ
れ、同スクリュｌａの第１段可塑化渡練部ａ、ベント部
ｂ、第２段押出部ｃを経て、スクリュｌａの先端に溶融
押出される。Next, to explain the operation, the raw resin charged into the hopper 1 in Fig. 1 is supplied from the feeder 11 to the screw la, and the first stage plasticizing kneading section a, the vent section b, and the After passing through the two-stage extrusion section c, it is melt-extruded to the tip of the screw la.
この時ペン卜部ｂでは、ベント孔５よりペントケ−ス６
のガス抽出口７を経て溶融樹脂中のガス分は抽出される
。ペント孔５はシリンダ１の中心より片寄って設けられ
ており、第２図に示す例ではその形状は三日月状となっ
ているが、これに限定されるものではない。At this time, in the pen part b, the pen case 6 is opened from the vent hole 5.
The gas in the molten resin is extracted through the gas extraction port 7 . The pent hole 5 is provided offset from the center of the cylinder 1, and although its shape is crescent-shaped in the example shown in FIG. 2, it is not limited to this.
またこのペント孔５の内部には、同ペント孔内に盛り上
った溶融樹脂をスクリュｌａで送り易くするよう、ベン
トプラグ３の面取部３ａが形成されている。次に樹脂替
えを行なうには、第３図に示す如くペントケース６を取
外し（ベントケース６は取外し容易な構造となっている
）、樹脂替プラグ１２をペントプラグ３のペント孔５に
取付ける。Further, a chamfered portion 3a of the vent plug 3 is formed inside the pent hole 5 so that the molten resin that has risen inside the pent hole can be easily fed by the screw la. Next, in order to change the resin, remove the pent case 6 as shown in FIG. 3 (the vent case 6 has a structure that allows easy removal), and attach the resin change plug 12 to the pent hole 5 of the pent plug 3.
この樹脂替プラグ１２のペントブラグ３のペント孔５へ
の鉄合部は、丁度ペント孔５と同じ三日月状であって、
樹脂漏れが無いようにしつくりと舷合している。またペ
ント式射出成形機の成形運転時には、フィーダ１１より
の原料供給量は調整され、ベント孔５より熔融樹脂が溢
れ出ないようにしている。The iron fitting part of this resin replacement plug 12 to the pent hole 5 of the pent plug 3 has the same crescent shape as the pent hole 5,
The structure and sides are connected to prevent resin leakage. Further, during molding operation of the pent injection molding machine, the amount of raw material supplied from the feeder 11 is adjusted to prevent molten resin from overflowing from the vent hole 5.
即ち、スクリューａのペン卜部ｂでは樹脂圧は無く、む
しろ溶融樹脂はシリンダーを充満しないようにしている
。ここで樹脂替え時、ベント孔５を横脂替プラグ１２に
塞げば、ベント部ｂにも積極的に圧力が加えられるので
、シリンダ部には樹脂を充満させ、新しい樹脂で強引に
スクリューａの３ペント部ｂ、第２段押出部ｃ間の旧樹
脂を押し流すことが出来るようになり、樹脂替えが早く
達成できることとなる。また樹脂替えプラグ１２には、
樹脂漏れ量が調整可能なブリード孔１４があって適量の
樹脂を樹脂替え時に漏洩させるようにしてあるので、ベ
ント孔５側のペントブラグ３に設けた面取部３ａ部分に
滞留し勝ちな旧樹脂をも容易に洗い流すことができる。That is, there is no resin pressure in the pen part b of the screw a, rather the molten resin is prevented from filling the cylinder. When replacing the resin, if the vent hole 5 is plugged with the side oil replacement plug 12, pressure will be actively applied to the vent part b, so the cylinder part will be filled with resin and the new resin will forcefully close the screw a. The old resin between the 3-pent part b and the 2nd stage extrusion part c can now be washed away, making it possible to quickly change the resin. In addition, the resin replacement plug 12 includes
There is a bleed hole 14 where the amount of resin leakage can be adjusted, and an appropriate amount of resin is leaked when changing the resin, so old resin that tends to stay in the chamfered part 3a provided on the pentobrag 3 on the side of the vent hole 5. can also be easily washed away.
なお、以上の説明はペント式射出成形機について行なっ
たが、本発明はペント式押出機にも同様に適用できるも
のである。以上詳細に説明した如く本発明は、樹脂替え
時ペント孔を一時的に樹脂替プラグで閉塞し、シリンダ
内部は高圧状態として樹脂替えを行なうようにしたので
、シリンダ内部には樹脂が充満し、新しい樹脂で旧樹脂
を積極的に押し流して、早急に樹脂替えを達成すること
ができる。Although the above explanation has been made regarding a pent-type injection molding machine, the present invention is equally applicable to a pent-type extruder. As explained in detail above, in the present invention, when changing the resin, the pent hole is temporarily closed with a resin changing plug, and the inside of the cylinder is in a high pressure state when changing the resin, so that the inside of the cylinder is filled with resin. By actively flushing out the old resin with new resin, resin replacement can be accomplished quickly.
また本発明は樹脂替え時に、ベント孔に装着する櫨脂替
プラグのブリード孔より一部の溶融樹脂を漏洩させつつ
樹脂替えするようにしたので、ベント孔のスクリュに面
する側に滞留し勝ちな旧樹脂をも容易に洗い流すことが
できる。In addition, when changing the resin, the present invention allows some of the molten resin to leak through the bleed hole of the oak resin replacement plug attached to the vent hole, so that it tends to stay on the side of the vent hole facing the screw. Even old resin can be easily washed away.
第１図は本発明の方法を実施するペント式射出成形機の
側断面図、第２図は第１図に於いてペントケースを取外
した状態のペント孔部の平面図、第３図は樹脂替プラグ
を取付けた場合の第１図のＡ〜Ａ断面図である。
図の主要部分の説明、１…・・・シリンダ、ｌａ・・・
…スクリユ、３……ペントプラグ、５……ペント孔、１
２……樹脂替プラグ、１４……ブリード孔。
器ｌ図
第２図
第３図Fig. 1 is a side sectional view of a pent-type injection molding machine that implements the method of the present invention, Fig. 2 is a plan view of the pent hole in Fig. 1 with the pent case removed, and Fig. 3 is a resin injection molding machine. FIG. 2 is a sectional view taken along line A-A in FIG. 1 when a replacement plug is attached. Explanation of the main parts of the figure, 1...Cylinder, la...
...Screw, 3...Pent plug, 5...Pent hole, 1
2... Resin replacement plug, 14... Bleed hole. Figure 2 Figure 3
Claims (1)
樹脂替え時ベント孔を一時的に樹脂替プラグで閉塞し、
同プラグのブリード孔より一部の溶融樹脂を漏洩させつ
つ、シリンダ内部は高圧状態として樹脂替えを行なうこ
とを特徴とする方法。1 In a vented injection molding machine or vented extruder,
When replacing resin, temporarily block the vent hole with a resin replacement plug,
A method characterized by replacing the resin while leaving a part of the molten resin leaking from the bleed hole of the plug while keeping the inside of the cylinder in a high pressure state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54013995A JPS609892B2 (en) | 1979-02-09 | 1979-02-09 | How to change resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54013995A JPS609892B2 (en) | 1979-02-09 | 1979-02-09 | How to change resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55105543A JPS55105543A (en) | 1980-08-13 |
| JPS609892B2 true JPS609892B2 (en) | 1985-03-13 |
Family
ID=11848806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54013995A Expired JPS609892B2 (en) | 1979-02-09 | 1979-02-09 | How to change resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609892B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10532508B2 (en) * | 2016-11-18 | 2020-01-14 | Graham Engineering Corporation | Seal ring for vent saddle in extrusion barrel |
| CN110936546A (en) * | 2019-12-11 | 2020-03-31 | 吴秀丽 | V-shaped horizontal injection molding machine |
-
1979
- 1979-02-09 JP JP54013995A patent/JPS609892B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55105543A (en) | 1980-08-13 |
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