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济南注塑加工的工艺调整小技巧!

来源:http://www.sdlqmj.com 日期:2019-04-15 发布人:admin 浏览次数:
注塑速度的比例控制曾经被注塑机制造商普遍采用。固然电脑控制注塑速度分段控制系统早已存在,但由于相关的材料有限,这种机器设置的优势很少得到发挥。本文将系统的阐明应用多段速度注塑的优点,并概括地引见其在消弭短射、困气、缩水等制品缺陷上的用处。
Proportional control of injection speed has been widely used by injection machine manufacturers. Although the computer controlled injection speed subsection control system has existed for a long time, due to the limited related materials, the advantages of this kind of machine settings are seldom brought into play. In this paper, the advantages of multi-stage velocity injection moulding are systematically expounded, and its application in eliminating defects of products such as short-range shooting, trapping and shrinkage is briefly introduced.
射胶速度与制质量量的亲密关系使它成为注塑成型的关键参数。经过肯定填充速度分段的开端、中间、终点并完成一个设置点到另一个设置点的润滑过渡,能够保证稳定的熔体外表速度以制造出希冀的分子取问及小的内应力。
The close relationship between injection speed and quality makes it a key parameter of injection moulding. After confirming the beginning, middle and end points of filling speed segments and completing the lubrication transition from one setting point to another, stable melt surface velocity can be guaranteed to produce desired molecular interrogation and minimum internal stress.
我们倡议采用以下这种速度分段准绳:1)流体外表的速度应该是常数。2)应采用快速射胶避免射胶过程中熔体冻结。3)射胶速度设置应思索到在临界区域(如流道)快速充填的同时在入水口位减慢速度。4)射胶速度应该保证模腔填满后立刻中止以避免呈现过填充、飞边及剩余应力。
We propose to adopt the following speed subsection criteria: 1) The external velocity of the fluid should be constant. 2) Rapid injection should be used to avoid melt freezing during injection. 3) The setting of jetting speed should consider that the filling speed in critical area (such as runner) should be slowed down at the inlet position at the same time. 4) The injection speed should be guaranteed to stop immediately after filling the cavity to avoid overfilling, flying edge and residual stress.
设定速度分段的根据必需思索到模具的几何外形、其它活动限制和不稳定要素。速度的设定必需对注塑工艺和资料学问有较分明的认识,否则,制品质量将难以控制。由于熔体流速难以直接丈量,能够经过丈量螺杆行进速度,或型腔压力间接推算出(肯定止逆阀没有走漏)。
The geometric shape of the die, other limitations of movement and unstable factors should be considered according to the necessity of setting the speed segment. The setting of speed must have a clear understanding of injection process and information knowledge, otherwise, the quality of products will be difficult to control. Because it is difficult to measure the melt velocity directly, it can be calculated indirectly by measuring the screw speed or the cavity pressure (it is sure that the check valve is not leaking).
济南注塑加工
资料特性是十分重要的,由于聚合物可能由于应力不同而降解,增加模塑温度可能招致猛烈氧化和化学构造的降解,但同时由剪切惹起的降解变小,由于高温降低了资料的粘度,减少了剪切应力。无疑,多段射胶速度对成型诸如PC、POM、UPVC等对热敏感的资料及它们的分配料很有协助。
Data characteristics are very important. Because polymers may degrade due to different stresses, increasing molding temperature may lead to violent oxidation and chemical structure degradation, but at the same time, the degradation caused by shear decreases. High temperature reduces the viscosity of data and shear stress. Undoubtedly, the multi-stage injection speed is very helpful for the formation of heat sensitive materials such as PC, POM, UPVC and their distribution materials.
本文由济南注塑加工友情奉献,更多有关的知识请点击:http://www.sdlqmj.com 我们将会用先进的技术.真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待。
This article is dedicated by Jinan injection moulding processing friendship, more relevant knowledge please click: http://www.sdlqmj.com, we will use advanced technology and sincere attitude to provide you with comprehensive services. More relevant knowledge will be dedicated to you one after another. Please look forward to it.

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