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材料选择与注塑模具性能的关系

来源:http://www.sdlqmj.com 日期:2021-02-12 发布人:liqiang 浏览次数:
注塑模具的关键特性规定,在塑料薄膜成型生产过程中,可以确保产品质量的研磨工具的质量。 不同类型的塑料产品,不同类型的成形加工技术,研磨工具的原材料,特性和外观通常具有不同的规定。
The key characteristics of injection mold stipulate that the quality of grinding tools can ensure the product quality in the production process of plastic film molding. Different types of plastic products, different types of forming technology, raw materials, characteristics and appearance of grinding tools usually have different regulations.
1.耐高温性能随着空转成型机械设备的出现,塑料制品的生产率正在提高。 由于成型温度通常在165〜300°C的中间,有些流动性不好,成型速度快,这将使磨具的成型环境温度在非常高的时候超过350°C 短时间。 当研磨工具的工作温度高时,研磨工具的强度和抗压强度降低,这导致研磨工具的初始损坏或塑性变形无效。 为了确保研磨工具在使用过程中的精度和变形,模具钢需要具有较高的耐热性。 为了降低温度,模具钢需要具有优异的热传递和低线性膨胀系数。
1. High temperature resistance with the emergence of idling molding machinery, the productivity of plastic products is increasing. Because the molding temperature is usually in the middle of 165-300 ° C, some of the fluidity is not good, and the molding speed is fast, which will make the molding environment temperature of abrasive tools exceed 350 ° C for a short time at very high temperature. When the working temperature of the grinding tool is high, the strength and compressive strength of the grinding tool decrease, which leads to the initial damage or invalid plastic deformation of the grinding tool. In order to ensure the accuracy and deformation of grinding tools in use, die steel needs to have high heat resistance. In order to reduce the temperature, die steel needs to have excellent heat transfer and low coefficient of linear expansion.
2.大多数在工作温度下具有足够温度的工作标准都是极端极端的,有些标准经常承受较大的负载,并可能导致脆性断裂。 挤出成型工作压力很大,通常为12〜45MPa。 因此,为了避免模具零件在工作过程中突然脆性断裂,研磨工具必须具有较高的抗压强度和延展性。
2. Most of the working standards with enough temperature under the working temperature are extreme. Some standards often bear large load and may lead to brittle fracture. The working pressure of extrusion molding is very high, usually 12 ~ 45MPa. Therefore, in order to avoid the sudden brittle fracture of die parts in the working process, the grinding tool must have high compressive strength and ductility.
3.耐磨性伴随着塑料产品主要用途的扩展。 在塑料中,需要无机材料(例如玻璃纤维)来改善塑性变形。 由于添加了添加剂,塑料的流动性大大降低,从而导致研磨。 根据规定,该研磨工具具有优异的耐磨性。
3. Wear resistance is accompanied by the expansion of the main uses of plastic products. In plastics, inorganic materials (such as glass fiber) are needed to improve plastic deformation. Due to the addition of additives, the fluidity of the plastic is greatly reduced, resulting in grinding. According to the regulations, the grinding tool has excellent wear resistance.
4防腐在ABS环氧树脂中,加入防燃剂和聚乙烯等,会在整个成型过程中释放出蒸气,有时会在气流通道中破坏和破坏铁锈。 模具钢具有出色的耐腐蚀性。
4 anti corrosion in ABS epoxy resin, adding flame retardant and polyethylene will release steam in the whole molding process, and sometimes damage and destroy rust in the airflow channel. Die steel has excellent corrosion resistance.
济南注塑模具
Jinan injection mold
5优良的钻孔生产加工特性,其次是塑料制品的进口,外观复杂精确,磨具用钢具有优良的钻孔加工特性,整个钻孔过程的冷作硬化小。 为了防止研磨工具的变形并损害精度,期望可以将生产过程的内部应力控制到更小。
5 excellent drilling production and processing characteristics, followed by the import of plastic products, the appearance is complex and accurate, abrasive steel has excellent drilling processing characteristics, the cold work hardening of the whole drilling process is small. In order to prevent the deformation of the grinding tool and damage the accuracy, it is expected that the internal stress of the production process can be controlled to a smaller value.
6.抛光工艺性能芯部表面光滑,抛光成型表面并镜面成粗糙度小于μm的镜面玻璃,以确保塑料抑制器的外观并促进模压。
6. Polishing process performance: the core surface is smooth, and the surface is polished to form mirror glass with roughness less than μ m, so as to ensure the appearance of plastic suppressor and promote molding.
7.高精度和高精度磨削刀片的生产具有很高的精度和精度。 模具规格的精度通常为3〜5。 拼接模具的接合面应确保紧密,以防止熔融的原材料进入间隙,从而导致毛边。
7. The production of high precision and high precision grinding blade has high precision and precision. The accuracy of mold specifications is usually 3-5. The joint surface of the splicing die shall be tight to prevent molten raw material from entering the gap, resulting in burrs.
8.装饰图案的光蚀刻特性许多塑料产品用于清洁,并且在表面上添加装饰图案。 在皮革制品工业中,使用大中型皮革压纹板,这表明模具钢具有良好的图案光蚀刻性能。 。
8. Light etching characteristics of decorative patterns many plastic products are used for cleaning, and decorative patterns are added to the surface. In the leather products industry, large and medium-sized leather embossed plate is used, which shows that die steel has good pattern photoetching performance.
因此,模具钢应考虑抗压强度,强度,耐磨性,耐高温性,耐腐蚀性等性能指标; 合在一起还应具有优良的抛光和抛光性能,规格可靠性,易氮化和淬火回火处理等小变形性能; 优良的热传递和小的热膨胀系数等工艺性能。 应根据零件的实际规格和模具钢的质量选择注塑模具。
Therefore, the die steel should consider the compressive strength, strength, wear resistance, high temperature resistance, corrosion resistance and other performance indicators; together, it should also have excellent polishing and polishing performance, specification reliability, easy nitriding, quenching and tempering and other small deformation properties; excellent heat transfer and small coefficient of thermal expansion and other process properties. The injection mold should be selected according to the actual specifications of the parts and the quality of the mold steel.

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