JPH0218016A - Intermittently delivering device of plastic material - Google Patents
Intermittently delivering device of plastic materialInfo
- Publication number
- JPH0218016A JPH0218016A JP16776088A JP16776088A JPH0218016A JP H0218016 A JPH0218016 A JP H0218016A JP 16776088 A JP16776088 A JP 16776088A JP 16776088 A JP16776088 A JP 16776088A JP H0218016 A JPH0218016 A JP H0218016A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- relief valve
- relief
- plastic material
- delivery
- 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
- 239000000463 material Substances 0.000 title claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 3
- 238000009834 vaporization Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000005243 fluidization Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Control Of Conveyors (AREA)
- Screw Conveyors (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は可塑性材料間歇吐出装置、特に可塑性材料成形
装置における可塑性材料間歇吐出装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an intermittent dispensing device for a plastic material, particularly to an intermittent discharging device for a plastic material in a plastic material molding device.
（従来技術）
第２図は従来の可塑性材料間歇吐出装置を有する可塑性
材料成形装置を示し、１は可塑性材料計量ホッパー、２
は可塑性材料の流動化機構、３はその駆動モータ、４は
材料の計量、吐出機構、５は前記流動化機構２と計量、
吐出機構４間に夫々バルブ６．７を介して介挿した材料
保持機構、８はこの材料保持機構５°のシリンダー ９
，１０は夫々材料側及び加圧室側のシリンダーピストン
、１１はこの両ピストンを互いに連結するピストンロン
ド、１２は前記シリンダー８内の加圧室側に開口した加
圧流体供給孔、１３は材料保持機構５のシリンダー８に
対する材料入口の圧力検出器、１４は前記計量、吐出機
構４より間歇的に吐出される材料を順次受は取るモール
ド、１５はその移送コンベアを示す。(Prior Art) Fig. 2 shows a conventional plastic material forming apparatus having a plastic material intermittent discharge device, in which 1 is a plastic material measuring hopper, 2
is a plastic material fluidization mechanism; 3 is a drive motor thereof; 4 is a material metering and discharge mechanism; 5 is the fluidization mechanism 2 and metering mechanism;
A material holding mechanism inserted between the discharge mechanisms 4 through valves 6 and 7, 8 is a cylinder of 5° of this material holding mechanism 9
, 10 are cylinder pistons on the material side and the pressurizing chamber side, 11 is a piston rod connecting these pistons to each other, 12 is a pressurized fluid supply hole opened on the pressurizing chamber side in the cylinder 8, and 13 is a material side. A pressure detector at the material inlet to the cylinder 8 of the holding mechanism 5, 14 a mold that sequentially receives the material intermittently discharged from the metering and discharging mechanism 4, and 15 a conveyor thereof.
（発明が解決しようとする課題）
上述したような可塑性材料成形装置においては可塑性材
料は流動化機構２によって加熱流動化された後バルブ６
を開いて材料保持機構５内に導入保持され、必要に応じ
てバルブ７を開き、材料保持機構５のシリンダー８内の
加圧室に加圧空気を送ることによってシリンダー８内の
材料が計量、吐出機構４に送り出され、コンベア１５上
のモールド１４内に順次間歇的に吐出されるものである
が、可塑性材料、例えば高温の溶融ポリマー等を間歇的
に吐出する装置においてはその吐出ポンプの回転を幾ら
正確に制御しても１シヨツト毎の重量にバラツキが出て
しまう。(Problems to be Solved by the Invention) In the plastic material molding apparatus as described above, the plastic material is heated and fluidized by the fluidization mechanism 2 and then passed through the valve 6.
The material in the cylinder 8 is metered by opening the valve 7 and sending pressurized air to the pressurized chamber in the cylinder 8 of the material holding mechanism 5. It is sent to the discharge mechanism 4 and is sequentially and intermittently discharged into the mold 14 on the conveyor 15, but in a device that intermittently discharges a plastic material, such as a high temperature molten polymer, the rotation of the discharge pump No matter how accurately the weight is controlled, there will be variations in the weight of each shot.
このバラツキの最大原因は溶融材料中に含まれる水分等
が気化して、泡となるために、材料の体積が大きくなり
、吐出ポンプを正確に制御して、吐出体積が正確であっ
ても、泡の分だけ、重量が軽くなってしまうことにある
。The biggest cause of this variation is that moisture contained in the molten material vaporizes and becomes bubbles, which increases the volume of the material.Even if the discharge pump is controlled accurately and the discharge volume is accurate, The problem is that the weight is reduced by the amount of foam.
従ってこの問題を解決するためには、水蒸気の発生を押
さえることが最もを効であり、このためには溶融ポリマ
ーの圧力をその蒸気圧以上に保持すれば良い。Therefore, in order to solve this problem, it is most effective to suppress the generation of water vapor, and for this purpose, it is sufficient to maintain the pressure of the molten polymer above its vapor pressure.
（課題を解決するための手段）
本発明の可塑性材料間歇吐出装置は可塑性材料計量、吐
出機構の材料吐出口と吐出ノズル間にリリーフ弁が介挿
されており、前記材料吐出口の材料圧が前記リリーフ弁
のリリーフ圧より大きくなったとき前記リリーフ弁が開
くようにすると共に、前記リリーフ圧を前記材料吐出口
における材料の温度における蒸気圧より高くしたことを
特徴とする。(Means for Solving the Problems) In the plastic material intermittent discharge device of the present invention, a relief valve is inserted between the material discharge port and the discharge nozzle of the plastic material metering and discharge mechanism, and the material pressure at the material discharge port is reduced. The relief valve is configured to open when the pressure becomes higher than the relief pressure of the relief valve, and the relief pressure is set higher than the vapor pressure at the temperature of the material at the material discharge port.
（作 用）
本発明の可塑性材料間歇吐出装置によれば材料中に気化
による泡を生ぜず吐出量を正確ならしめることができる
。(Function) According to the plastic material intermittent discharge device of the present invention, the discharge amount can be made accurate without producing bubbles due to vaporization in the material.
（実施例） 以下図面によって本発明の詳細な説明する。(Example) The present invention will be explained in detail below with reference to the drawings.
本発明においては第１図に示すように計量、吐出機構４
の吐出口１６と吐出ノズル１７間にリリーフ弁１８を介
挿し、前記吐出口１６に圧力検知器１９を接続し、前記
吐出口１６の材料圧がリリーフ弁１８のリリーフ圧より
高いときリリーフ弁１８が開いて材料が吐出ノズル１７
がら吐出されるようにすると共に、リリーフ弁１８のリ
リーフ圧を前記吐出口における材料の溶融温度における
蒸気圧より高く設定せしめる。In the present invention, as shown in FIG.
A relief valve 18 is inserted between the discharge port 16 and the discharge nozzle 17, a pressure detector 19 is connected to the discharge port 16, and when the material pressure of the discharge port 16 is higher than the relief pressure of the relief valve 18, the relief valve 18 opens and the material is discharged from the nozzle 17
At the same time, the relief pressure of the relief valve 18 is set higher than the vapor pressure at the melting temperature of the material at the discharge port.
（発明の効果）
本発明の可塑性材料間歇吐出装置は上記のような構成で
あるから材料の吐出圧力が常時その蒸・気圧以上になり
、気化による泡を材料中に住ぜず材料の吐出量を正確な
らしめることができる大きな利益がある。(Effects of the Invention) Since the plastic material intermittent discharge device of the present invention has the above-mentioned configuration, the discharge pressure of the material is always higher than the vapor pressure, and the amount of material discharged is reduced without allowing bubbles due to vaporization to reside in the material. There is a huge benefit in being able to make the results accurate.
ア、１６・・・吐出口、１７・・・吐出ノズル、１８・
・・リリーフ弁、１９・・・圧力検知器。A, 16...Discharge port, 17...Discharge nozzle, 18.
...Relief valve, 19...Pressure detector.
第１図は本発明の可塑性材料間歇吐出装置を用いた可塑
性材料成形装置の説明図、第２図は従来の装置の説明図
である。FIG. 1 is an explanatory diagram of a plastic material molding device using the plastic material intermittent discharge device of the present invention, and FIG. 2 is an explanatory diagram of a conventional device.
Claims (1)
ズル間にリリーフ弁が介挿されており、前記材料吐出口
の材料圧が前記リリーフ弁のリリーフ圧より大きくなっ
たとき前記リリーフ弁が開くようにすると共に、前記リ
リーフ圧を前記材料吐出口における材料の温度における
蒸気圧より高くしたことを特徴とする可塑性材料間歇吐
出装置。 ２、前記材料が溶融ポリマーである請求項１記載の可塑
性材料間歇吐出装置。[Claims] 1. A relief valve is inserted between the material/discharge port and the discharge nozzle of the plastic material metering and discharge mechanism, and the material pressure at the material discharge port is greater than the relief pressure of the relief valve. An intermittent discharge device for plastic material, characterized in that the relief valve opens when the material is discharged, and the relief pressure is higher than the vapor pressure at the temperature of the material at the material discharge port. 2. The apparatus for dispensing an intermittent plastic material according to claim 1, wherein the material is a molten polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16776088A JPH0218016A (en) | 1988-07-07 | 1988-07-07 | Intermittently delivering device of plastic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16776088A JPH0218016A (en) | 1988-07-07 | 1988-07-07 | Intermittently delivering device of plastic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0218016A true JPH0218016A (en) | 1990-01-22 |
| JPH0571005B2 JPH0571005B2 (en) | 1993-10-06 |
Family
ID=15855585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16776088A Granted JPH0218016A (en) | 1988-07-07 | 1988-07-07 | Intermittently delivering device of plastic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0218016A (en) |
-
1988
- 1988-07-07 JP JP16776088A patent/JPH0218016A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0571005B2 (en) | 1993-10-06 |
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