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注塑模具成型零件材料选用的要求

来源:http://www.sdlqmj.com 日期:2019-04-17 发布人:admin 浏览次数:
模具材料的选用在模具设计和制造中是一个比拟重要的问题,直接影响到模具的制造工艺、模具的运用寿命、塑件的成型质量和模具的加工本钱等一系列方面。济南注塑模具通知大家,正由于如此,国内外学者开发出具有良好运用性能和加工性能、热处置变形小的新型模具钢种,如预硬钢、新型淬火回火钢和马氏体时效钢等。另外,为了进步模具的寿命,在模具成型零件的外表强化处置方面也做了许多研讨与工程理论,并且获得了很好的效果。到目前为止,上述研讨和开发工作还在不时地深化停止,已获得的成果正在鼎力推行。
The selection of die materials is an important issue in die design and manufacturing, which directly affects the manufacturing process, service life of the die, the quality of the plastic parts and the cost of the die processing. Jinan Injection Mold informs you that for this reason, scholars at home and abroad have developed new die steels with good operational and processing properties and small thermal treatment deformation, such as pre-hardened steel, new quenched tempered steel and maraging steel. In addition, in order to improve the life of the die, many discussions and engineering theories have been made on the surface strengthening treatment of the die forming parts, and good results have been achieved. So far, the above-mentioned research and development work has been deepened and stopped from time to time, and the achievements achieved are being vigorously implemented.
(1) 的抛光性能
(1) Excellent polishing performance
高质量的塑料制品,请求型腔外表的粗糙度值小。因而,注塑模成型零件工作外表多需求抛光到镜面,Ra≤0.05μm,需求钢材硬度35~40 HRC 为宜,外表过硬会使抛光艰难。为此,选用的钢材请求资料杂质少,显微组织应平均致密,无纤维方向性,抛光时不应呈现麻点或桔皮状缺陷。
For high quality plastic products, the required surface roughness of the cavity is small. Therefore, the working surface of injection molded parts needs polishing to the mirror, Ra < 0.05 um, steel hardness 35 ~ 40 HRC is appropriate, too hard surface will make polishing difficult. For this reason, the required data of steel should be less impurities, the microstructure should be average dense, no fiber orientation, and no pitting or orange peel defects should be present in polishing.
(2) 良好的机械加工性能
(2) Good machinability
要选用易于切削,且在加工后能得到高精度零件的钢种。为此,以中碳钢和中碳合金钢常用,这对大型模具特别重要。对需求电火花加工的零件,还请求该钢种的烧伤硬化层较薄。
The steel grade which is easy to cut and can get high precision parts after processing should be selected. For this reason, medium carbon steel and medium carbon alloy steel are most commonly used, which is particularly important for large-scale dies. For parts requiring EDM, thin burn hardening layer of the steel is also required.
(3) 良好的热稳定性
(3) Good thermal stability
塑料注射模的零件外形常常比拟复杂,淬火后难以加工,因而应尽量选用具有良好的热稳定性的资料,使得模具成型零件经热处置后线收缩系数小,热处置变形小,温度差别惹起的尺寸变化率小,金相组织和模具尺寸稳定,可减少或不再停止加工,从而保证模具尺寸精度和外表粗糙度请求。
济南注塑模具
Plastic injection mold parts are often complex in shape and difficult to be processed after quenching. Therefore, good thermal stability data should be selected as far as possible to ensure that the mold ruler can be reduced or stopped because of the small linear shrinkage coefficient, small heat treatment deformation, small change rate of size caused by temperature difference, stable metallographic structure and dimension of the mold, and thus the mold ruler can be guaranteed. Inch accuracy and surface roughness requirements.
(4) 耐腐蚀性能
(4) Corrosion resistance
对有些塑料种类,如聚氯乙烯和阻燃型塑料,必需思索选用有耐腐蚀性能的钢种。
For some types of plastics, such as polyvinyl chloride and flame retardant plastics, it is necessary to consider the choice of steel with corrosion resistance.
(5) 良好的耐磨性和抗疲倦性能
(5) Good wear resistance and fatigue resistance
注塑模型腔不只受高压塑料熔体冲刷,而且还受冷热交变的温度应力作用。普通的高碳合金钢可经热处置取得高硬度,但韧性差,易构成外表裂纹,不宜采用。所选钢种应使注塑模能减少抛光修模的次数,能长期坚持型腔的尺寸精度,到达批量消费的运用寿命期限。
Injection mold cavity is not only eroded by high-pressure plastic melt, but also affected by temperature stress of alternating heat and cold. Ordinary high carbon alloy steel can obtain high hardness by heat treatment, but its toughness is poor, and it is easy to form surface cracks, so it is not suitable to use. The selected steel should make the injection mould reduce the number of polishing and repairing, maintain the dimensional accuracy of the cavity for a long time, and reach the service life of mass consumption.
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The above wonderful contents are provided by Jinan Injection Mold Finishing, I believe you have a certain understanding of it through our explanation. For more details, please pay attention to our official website: http://www.jnhsjlm.com! If you are satisfied with our service, please tell your friends around you. If you feel that our service is not good enough, you should help us improve it. We would appreciate it very much.

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