【正文】 低吸水率、 電鍍能力好 ，成本較高 汽車 （軸承座，面板）、 電器元件、 軸承座，管道組件 聚苯硫 聚苯硫醚 很高的強度、 熱阻力，棕色，成本很高 軸承、 蓋、 燃油系統(tǒng)組件、 參考線、 交換機和盾牌 聚丙烯 聚丙烯 重量輕、 耐熱性、 高耐刮抵抗、 天然糯外觀、 堅韌和僵硬、 低成本。 另一方面，為未來的網(wǎng)絡為基礎的生產(chǎn)要求，顯然， PCC 控制系統(tǒng)更具競爭優(yōu) 勢，所以我們有理由相信， PCC 控制系統(tǒng)在未來將是發(fā)生在注塑機領域。 寶成單個任務在不同的模塊準備，用不同的編程語言，這意味著不僅在常規(guī) PLC一直到人們熟悉的階梯的特點靈活選擇，指令表語言委員會可以繼續(xù)使用，但用戶可以使用更加高效和直觀的高級語言（ PL2020），這是一個完整的文字語言控制，基本熟悉語法的技術人員會感到一種似曾相識的感覺，這說明控制要求一個非常簡單的，直觀的。 PCC 是其最大的特點是類似于大型計算機的分時多任務操作系統(tǒng)和多樣化的應用軟件的設計。 然而，閥芯位置是一個中間變量，因此控制精度稍差。 模具溫度是在接觸與產(chǎn)品模具型腔表面溫度，它會顯著影響充膜，冷卻和包裝過程。第二項議案注射壓力，速度和位移的多級交換過程的控制系統(tǒng)。 更先進的控制方法是應用計算機控制，就是建立一個閉環(huán)實時計算機控制系統(tǒng)。s maximum wall thickness can also play a role. The weight of material that is required includes the material that fills the channels of the mold. The size of those channels, and hence the amount of material, is largely determined by the thickness of the part. Production cost The production cost is primarily calculated from the hourly rate and the cycle time. The hourly rate is proportional to the size of the injection molding machine being used, so it is important to understand how the part design affects machine selection. Injection molding machines are typically referred to by the tonnage of the clamping force they provide. The required clamping force is determined by the projected area of the part and the pressure with which the material is injected. Therefore, a larger part will require a larger clamping force, and hence a more expensive machine. Also, certain materials that require high injection pressures may require higher tonnage machines. The size of the part must also ply with other machine specifications, such as clamp stroke, platen size, and shot capacity. The cycle time can be broken down into the injection time, cooling time, and resetting time. By reducing any of these times, the production cost will be lowered. The injection time can be decreased by reducing the maximum wall thickness of the part and the part volume. The cooling time is also decreased for lower wall thicknesses, as they require less time to cool all the way through. Several thermodynamic properties of the material also affect the cooling time. Lastly, the resetting time depends on the machine size and the part size. A larger part will require larger motions from the machine to open, close, and eject the part, and a larger machine requires more time to perform these operations. 注塑機 及其 的控制 現(xiàn)代塑料注塑機是一個典型的系統(tǒng)集機械，電氣和流體，此設備已形成了復雜的產(chǎn)品，少的后處理，加工各種塑料的特性，自成立以來發(fā)展迅速，目前全過世界上的產(chǎn)品 80％用于加工塑料注塑成型機。s products are used plastic injection molding machine for processing. Conventional injection molding machines generally use a simple openloop control, that is, in accordance with a preset value of control. In the device manufacturing process, preconfigured parameter values, such as the clamping force, cycle time, temperature, etc., from the machine in the production process be maintained. For example, by controlling the die temperature can be maintained the temperature of heating fluid, plastic temperature can be outside the heating device by controlling the power to maintain. This control method of simple structure, however, poor antiinterference ability to control the temperature is relatively low. At present, more injection molding machine uses a closedloop control, that is, according to online measurement value and set the value of the deviation control. Closedloop control system uses a negative feedback loop, antijamming ability, when the injection speed, injection pressure, mold cavity temperature, cavity pressure, melt temperature and oil pressure due to interference in the production process, deviation of the machine through the adaptive control system for automatic correction of interference. This control method of antiinterference ability, high control accuracy. More advanced control method is to apply puter controlled, that is, to build a closedloop realtime puter control system. It includes direct digital control system (DDC), supervisory puter control system (SCC), distributed control system (DCS) and multilevel control of several types. Commonly used injection molding machine control system has three kinds, namely, the traditional relaybased, programmable controllers and puterbased control type. In recent years, programmable logic controller (referred to as PLC) with its high reliability, highperformance characteristics in injection molding machine control system has been widely used. In order to improve the level of injection molding machine control system and quality, a higher level than the PLC, control system design specifically for small and medium programmable puter controller (PCC) came into being. PCC integrates a standard PLC and industrial control puter features, multitask timesharing operating systems, data puting and processing power more powerful than the PLC. PCC formed with injection molding machine control system in order to achieve, including position control, speed control, temperature control, fault control and realtime display the whole process such as injection molding a variety of control can greatly improve the quality of plastic products will help enhance economic benefits. Control of the contents of the injection molding machine Injection molding machine process control system mainly consists of two parts: First, the temperature control system in order to right barrel, melt and