【正文】 冷卻時間也 是為了 減少墻體厚度，因為它們 所有的工序 需要較少的時間 冷卻 ，材料熱力學的幾個性質(zhì)也影響了冷卻時間。注塑機通常是指由它們提供的夾緊力噸位。 可能的缺陷 缺陷 原因 閃存 ? 注射壓力過高 ? 夾緊力 太 低 翹曲 ? 非均勻冷卻速度 泡沫 ? 注塑溫度太高 ? 在材料中的水分過高 ? 非均勻冷卻速度 空心的截面 ? 不足 槍 卷 ? 流量的材料太低 沉標記 ? 注射壓力太低 非均勻冷卻速度 引射器標記 ? 冷卻時間太短 ? 射血力太高 上述缺陷的很多是由非均勻冷卻造成的。可以使用大多數(shù)的聚合物，包括所有熱塑性塑料，一些熱固性塑料和一些彈性體。 在硬件結(jié)構(gòu)， PCC 的特點非常顯著。 這種待遇，直接導致 “控制速度 ”，在應(yīng)用程序的大小取決于，這個結(jié)果是毫無疑問的高要求宗教在實時控制 I / O 通道。 傳輸模式控制過程應(yīng)該是另一個重要的變量是位置。 前一種方法中，以加熱載體的出口對象的控制溫度，相對簡單，并能滿足一般的溫度控制要求。1 ℃ 。 常用的注塑機控制系統(tǒng)有三種，即傳統(tǒng)的 基于繼電器，可編程控制器和基于計算機的控制類型。 在設(shè)備制造過程中，預先設(shè)定的參數(shù)值，如從機器的鎖模力，循環(huán)時間，溫度等，在生產(chǎn)過程中予以保留。 1 ℃ . Precise temperature control in precision injection molding that help improve product quality and availability of raw materials is a very important indicator. In the plastic processing, temperature control include barrel, nozzle and mold temperature control. Barrel temperature of the barrel surface heating temperature, due to relatively thick wall barrel, so the choice of thermocouple detection point is critical, and different test points on the temperature curve is a large difference. Therefore, parallel detection of doublepoint, namely, surface and deep in the barrel at the same time set the thermocouples, will be relatively stable temperature curve is conducive to temperature control accuracy. Nozzle melt temperature directly affects the passage of the shear flow, the quality of the products have a major impact, so the nozzle temperature control precision demanding. Mold temperature is in contact with the product mold cavity surface temperature, it will significantly affect the charge membrane, cooling and packing process. For the mold temperature control method can be used control the heat carrier temperature method can also directly control the mold temperature. In the former approach, in order to heat the temperature for the control of the export vector objects, is relatively simple and can meet the general temperature control requirements. When the temperature control precision is high generally use the second method of temperature control. Injection speed, packing pressure, back pressure is the injection of part of the sol to control the first of the three variables directly affect the accuracy of its control product quality. Modern more advanced injection molding machine equipped with 510 multistage injection speed and packing, as well as melt glue back pressure control. Generally through displacement / velocity sensors, pressure sensors, closedloop injection control, and high response servo valves used in conjunction to achieve the process of injection molding melt glue back pressure, injection speed and packing conditions of precise control. Another relatively simple approach is to use closedloop proportional valve, through the proportional valve spool position of their own closedloop control to improve control precision. However, spool position is an intermediate variable, so the control accuracy somewhat less. Transfer mold process control variable is the main clamping force, clamping force and time again is stable and the necessary conditions for forming the cycle. Transfer mode control of the process should be another important variable is location. On the one hand, advanced injection molding machine constant pursuit of efficiency, directly affect the speed of transfer mold molding cycle, and quickly transfer to the deceleration control mode in itself has put forward higher requirements. On the other hand, due to special process of continuous development and promotion of position control precision molds have bee increasingly demanding. PLC and PCC Since the late 20th century, 60 the United States the first programmable logic controller PLC inception, PLC control technology has gone through a 30year development process, especially with modern puter technology and microelectronics technology, it has been in the soft hardware technology is far out of the original sequence control of the prototype stage. Programmable Computer Controller (PCC) is to represent the development trend of this new generation of programmable controllers. PLC pared with conventional, PCC is a for motion control, process control and work control of dedicated control system, is a standard PLC, numerical control systems and industrial performance characteristics of the puter in one of the intelligent controller. PCC is its biggest feature is similar to a large puter timesharing multitasking operating systems and diverse software applications design. Most of the conventional singletask PLC clock scanning or monitoring procedures to deal with the process itself of the logic operation instructions and external I / O channel status of collection and refresh. This treatment led directly to control the speed, depends on the size of the application, this result is no doubt that I / O channels in realtime control of the high demand religions. PCC39。s system software the perfect solution to this problem, it uses timesharing mechanism to build their applications multitasking software operating platform, so that the application program running the length of cycle and has nothing to do, but by the decision cycle of the operating system. As a result, it will scan cycle of the application with the real distinction between the external control cycle to meet the real requirements of realtime control. Of course, this control cycle in the CPU puting power to