·温度
射出成形では温度の測定と制御が非常に重要です. これらの測定は比較的単純ですが、, ほとんどの射出成形機には、十分な温度サンプリング ポイントまたはラインがありません。.
ほとんどの射出成形機で, 温度は熱電対によって感知されます. A thermocouple is basically made up of two different wire tails. If one end is hotter than the other, a tiny telecommunication will be generated; The more heat, 信号が強いほど.
·温度管理
Thermocouples are also widely used as sensors in temperature control systems. 制御装置について, 必要な温度を設定します, and the display of the sensor will be compared with the temperature generated on the set point. In this simplest system, 温度が設定温度に達したとき, it will turn off, and the power will turn on again when the temperature drops. This system is called open close control because it is either on or off.
·溶融温度
The melt temperature is very important, and the temperature of the injection cylinder used is only instructive. The melt temperature can be measured at the nozzle or by air injection. The temperature setting of the injection cylinder depends on the melt temperature, スクリュー速度, 背圧, injection volume and injection cycle.
If you have no experience in processing a certain level of plastic, please start with the lowest setting. For easy control, the injection cylinder is divided into zones, but not all of them are set to the same temperature. If operating for a long time or at a high temperature, set the temperature of the first zone to a lower value, which will prevent premature melting and segregation of plastic. Before injection, make sure that the hydraulic oil, hopper closer, mold and injection cylinder are at the correct temperature.
·射出圧力
This is the pressure that causes the plastic to flow and can be measured by sensors on nozzles or hydraulic lines. 固定値はありません, and the more difficult the mold filling is, the higher the injection pressure is. The injection line pressure is directly related to the injection pressure.
·First stage pressure and second stage pressure
射出サイクルの充填過程で, high injection pressure may be required to maintain the injection speed at the required level. High pressure is no longer required after the mold is filled. しかしながら, when some semi crystalline thermoplastics (PAやPOMなど) are injected, the structure will deteriorate due to the sudden change of pressure, so it is sometimes unnecessary to use the secondary pressure.
·型締圧力
In order to counter the injection pressure, it is necessary to use the clamping pressure. Instead of automatically selecting the maximum value available, it is necessary to consider the projected area and calculate a suitable value. The projected area of the injection part is the largest area seen from the application direction of the clamping force. ほとんどの射出成形の場合, it’s about 2 トン/平方インチ, また 31 trillion Newtons per square meter. しかしながら, this is only a low value and should be taken as a rough empirical value, 射出部に深さがあると, then the sidewall must be considered.
·背圧
This is the pressure that needs to be generated and exceeded before the screw retreats. Although high back pressure is conducive to the uniform distribution of pigment and the melting of plastic, 中ネジの戻り時間も長くなります, reduces the length of fiber contained in the filled plastic, and increases the stress of the injection molding machine; したがって、, 背圧が低いほど, よりいい. Under no circumstances can it exceed 20% of the injection pressure (maximum quota) of the injection molding machine.
·ノズル圧力
Nozzle pressure is the pressure inside the nozzle. It’s about the pressure that causes the plastic to flow. 固定値はありません, しかし、金型の充填が困難になると増加します. There is a direct relationship among nozzle pressure, ライン圧力と射出圧力. In the screw injection molding machine, the nozzle pressure is about 10% less than the injection pressure. In the piston injection molding machine, the pressure loss can reach about 10%. In piston injection molding machine, the pressure loss can reach 50%.
·射出速度
This refers to the filling speed of the die when the screw is used as a punch. When injection molding thin-walled products, it is necessary to use high shooting speed, so that the mold can be completely filled when the melt glue is not solidified, and the smooth surface can be produced. During filling, a series of programmed firing rates are used to avoid defects such as jet or trapped air. Injection can be carried out in open-loop or closed-loop control system.
No matter what kind of injection speed is used, the speed value and injection time must be recorded on the record sheet. Injection time refers to the time required for the mold to reach the predetermined first stage injection pressure, which is a part of the screw advance time.
JasonMould Industrial CompanyLimitedについて
ジェイソンモールドは 中国の金型メーカー プラスチック金型の- 射出成形金型, ダイカスト金型, プラスチックブロー成形, 回転成形, 医療 プラスチック射出成形, ツーショット プラスチック射出成形, インサート成形, オーバーモールド, 金属射出成形, マイクロ射出成形, 粉末射出成形, セラミック射出成形, 液体射出成形, ハスキーインジェクションモールディング, 家庭用カビ, 鋳造金型, ダイモールドツール, カスタムモールド, 中国のカビ, ラピッドプロトタイピングツール, プラスチックプロトタイピングツーリング, パンチプレス工具, 携帯電話/携帯電話部品用の金型と工具, 自動車部品, 掃除機, 充電式ツール, 電話, コピー機, コンピューター, マルチメディアスピーカー, および他の多くの電子製品および家電製品. また、プラスチック製品メーカー, 金型メーカー中国- プラスチックの部品, プラスチック製の水タンク, プラスチックボール, プラスチック容器, プラスチックバックル, プラスチックアンカー, プラスチックハンガー, プラスチックスプーン, プラスチックパイプフィッティング, プラスチックタンブル, プラスチック製食器, プラスチックのコップ, ペットボトル, プラスチックトレイ, プラスチック化粧品容器, プラスチックケース, プラスチック製の食品容器, プラスチック製の椅子, プラスチックキャップ, プラスチックキャップクロージャー, プラスチックチューブ, プラスチック製の水道管, プラスチック製のノブ, プラスチックチューブ, プラスチック製ユーティリティボックス, プラスチックラックなど.
連絡先:
人: ジェームズ・ユアン
会社: JasonMould Industrial Company Limited
追加: 竜崗村,Long西町,博羅県,恵州市,広東省, 中国
電話: 86-752-6682869
Eメール: [email protected]
