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    塑料模具的钢性能要求

    来源:/ 日期:2022-10-13 发布人:admin


    随着高性能塑料的发展和不断生产,塑料制品的种类日益增多,用途不断扩大,制品向精细化、大型化、复杂化发展。下面山东银河国际·Galaxy(中国)有限公司厂家来讲讲塑料模具的钢性能要求。
    With the development and continuous production of high-performance plastics, the types of plastic products are increasing and their applications are expanding. The products are becoming more refined, larger and more complex. Next, Shandong plastic mold steel manufacturers will talk about the steel performance requirements of plastic molds.
    1)型腔表面的磨损和腐蚀
    1) Wear and corrosion of cavity surface
    塑料熔体以一定的压力在模腔内流动,凝固的塑件从模具中脱出,都对模具成型表面造成摩擦,引起磨损。造成塑料模具磨损失效的根本原因就是模具与物料间的摩擦。
    The plastic melt flows in the mold cavity under a certain pressure, and the solidified plastic parts are pulled out of the mold, which will cause friction and wear on the molding surface of the mold. The fundamental cause of plastic mould wear failure is the friction between the mould and materials.
    但磨损的具体形式和磨损过程则与许多因素有关,如模具在工作过程中的压力、温度、物料变形速度和润滑状况等。当塑料模具使用的材料与热处理不合理时,塑料模具的型腔表面硬度低,耐磨性差,其表现为:
    However, the specific form and process of wear are related to many factors, such as the pressure, temperature, material deformation speed and lubrication condition of the die in the working process. When the materials and heat treatment used in the plastic mold are unreasonable, the surface hardness of the cavity of the plastic mold is low and the wear resistance is poor, which is shown as follows:
    型腔面因磨损及变形引起的尺寸超差;粗糙度值因拉毛而变高,表面质量恶化。尤其是当使用固态物料进入塑模型腔时,它会加剧型腔面的磨损。加之塑料加工时含有氯、氟等成分受热分解出腐蚀性气体HC1、HF,使塑料模具型腔面产生腐蚀磨损,导致失效。
    The dimension of the cavity surface is out of tolerance due to wear and deformation; The roughness value becomes higher due to galling, and the surface quality deteriorates. Especially when solid materials are used to enter the mold cavity, it will aggravate the wear of the cavity surface. In addition, when plastic processing contains chlorine, fluorine and other components, which are decomposed into corrosive gases HC1 and HF by heating, so that the surface of the plastic mold cavity is corroded and worn, leading to failure.
    如果在磨损的同时又有磨损损伤,使型腔表面的镀层或其他防护层遭到破坏,则将促进腐蚀过程。两种损伤交叉作用,加速了腐蚀一磨损失效。
    If there is wear damage at the same time, the coating or other protective layer on the cavity surface will be damaged, which will promote the corrosion process. The cross action of the two kinds of damages accelerates the corrosion wear failure.
    山东银河国际·Galaxy(中国)有限公司
    2)塑性变形失效
    2) Plastic deformation failure
    塑料模型腔表面受压、受热可引起塑性变形失效,尤其是当小模具在大吨位设备上工作时,更容易产生超负荷塑性变形。塑料模具所采用的材料强度与韧性不足,变形抗力低;塑性变形失效另一原因,主要是模具型腔表面的硬化层过薄,变形抗力不足或工作温度高于回火温度而发生相变软化,而使模具早期失效。
    The plastic deformation failure can be caused by the pressure and heat on the surface of the plastic mold cavity, especially when the small mold is working on the large tonnage equipment, it is more likely to produce overload plastic deformation. The strength and toughness of the materials used in the plastic mould are insufficient, and the deformation resistance is low; Another reason for plastic deformation failure is that the hardening layer on the surface of the mold cavity is too thin, the deformation resistance is insufficient, or the working temperature is higher than the tempering temperature, so that the transformation softening occurs, which makes the mold early failure.
    3)断裂
    3) Fracture
    断裂的主要原因是由于结构、温差而产生的结构应力、热应力或因回火不足,在使用温度下,使残余奥氏体转变成马氏体,引起局部体积膨胀,在模具内部产生的组织应力所致。
    The main reason for fracture is the structural stress and thermal stress caused by structure and temperature difference, or the insufficient tempering, which transforms the residual austenite into martensite at the service temperature, causing local volume expansion, and the organizational stress generated in the mold.
    随着制造业快速发展,塑料模具是塑料成型加工中不可缺少的工具,在总的模具产量中所占的比例逐年增加,您有相关需求就来我们网站咨询了解吧!
    With the rapid development of manufacturing industry, plastic mold is an indispensable tool in plastic molding processing, and its proportion in the total mold output is increasing year by year. Come to our website if you have relevant needs Ask and understand!

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