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注塑模具加工,每一步都清得清清楚楚!

来源:http://www.schaosen.com 日期:2019-12-05 发布人:admin 浏览次数:
  注塑模具加工有很多需要注意的地方,接下来我们一步一步的分析,希望对大家有所帮助:要根据应用需求选择适当的模具钢。如果是原型制作,则无需使用硬化模具钢。大多数情况下,通常使用预硬化钢或铝来降低成 本,以及便于在原型制作阶段对模具进行调整。这些软性金属还可以模塑出足够的试件及预制部件。预硬化的模具钢(如 P-20 或 NAKR-55)常用于制作大规模的模具,因为在大型应用中进行模具钢硬化是很不切实际的。
山东模具制造厂家,济南注塑模具
  There are many points to pay attention to in the processing of injection mold. Next, we will analyze step by step, hoping to help you: to select the appropriate mold steel according to the application requirements. If it is a prototype, it is not necessary to use hardened die steel. In most cases, pre hardened steel or aluminum is usually used to reduce costs and facilitate mold adjustment during prototyping. These soft metals can also mold enough test pieces and prefabricated parts. Pre hardened die steels (such as P-20 or nakr-55) are often used to make large-scale dies, because it is impractical to harden die steels in large-scale applications.
  在产量较高的情况下,需要对型芯和模腔使用硬化模具钢。S-7、H-13 和不锈钢 420 是最常用的钢材。S-7 是极其优秀的模钢,可 以长时间用于生产运作。如果需要很高的熔体和模具温度,则应选用 H-13 型钢材。H-13 还可用于制作热流道歧管。H-13 的回火 温度非常高,可以承受很高的模具加工温度而不影响硬度。
  In the case of high production, it is necessary to use hardened die steel for core and cavity. S-7, H-13 and stainless steel 420 are the most commonly used steels. S-7 is an excellent die steel, which can be used in production and operation for a long time. If high melt and mold temperatures are required, H-13 steel should be used. The H-13 can also be used to make hot runner manifolds. The tempering temperature of H-13 is very high, and it can withstand high mold processing temperature without affecting the hardness.
  如果应用领域对耐磨损性提出很高的要求,或者环境中会产生大量冷凝现象,则不锈钢则为模具钢的最佳选择。可使用 A2、 ASP23 或 D-2 型钢材制作具有高磨损性的模腔插件。
  Stainless steel is the best choice for die steel if the application field requires high wear resistance or there will be a lot of condensation in the environment. It can be made of A2, asp23 or D-2 steel with high wear resistance.
  所有模具钢都可依靠某些种类的镀层保护来防止磨损和腐蚀。只有不锈钢可通过焊接和机械加工来修复。对于已有镀层的钢,只 有在除去镀层后才能进行修复。修复后需重新敷涂镀层。
  All die steels can rely on certain types of plating protection to prevent wear and corrosion. Only stainless steel can be repaired by welding and machining. For the existing coated steel, only after removing the coating can it be repaired. The coating shall be repainted after repair.
  表面光洁度
  Surface finish
  根据部件美观要求、客户需求和功能的不同,成型部件的表面 可能各不相同。从 SPI #1 镜面般的高光泽表面到使用蚀刻技术 得到的纹理表面,LNP 复合材料几乎可以拥有任何类型的成型 部件表面光洁度。需要了解的很重要一点是,某些材料在具有 了某种模具表面光洁度后性能得到改进。例如,聚丙烯在无光 表面模具中的脱模性明显好于高光表面的模具。在填充量很多 的树脂中很难实现高光。
  Depending on the aesthetic requirements, customer requirements and functions of the parts, the surfaces of the formed parts may vary. From SPI ? 1 mirror like high gloss surface to texture surface obtained by etching technology, LNP composite can have almost any type of surface finish of formed parts. It is important to understand that some materials have improved performance with a certain mold surface finish. For example, the demoulding property of polypropylene in matt surface mold is obviously better than that of high gloss surface mold. It is difficult to achieve high gloss in the resin with a large amount of filling.
  排气
  exhaust
  为了最大程度提高模具性能,排气是成型周期中的重要一环。当热塑性材料进入模腔时,需要排出模腔中的空气。排气孔通 常位于最后填充到的部位,靠近缝合线的部位以及流道系统 上。沿分模线周边分布的附加排气孔可大大提高整体排气性 能。模具中的残留气体在成型部件上显示为焦痕。基本经验 是:模具中气体必须能够以与塑料进入模腔相同的速率排出。
  In order to improve the mold performance to the greatest extent, exhaust is an important part of the molding cycle. When the thermoplastic material enters the mold cavity, the air in the mold cavity needs to be discharged. Vent holes are usually located in the last filled area, close to the suture and on the runner system. The additional exhaust holes along the periphery of the parting line can greatly improve the overall exhaust performance. The residual gas in the mold is shown as scorch marks on the formed parts. The basic experience is that the gas in the mold must be able to be discharged at the same rate as the plastic entering the mold cavity.
  气孔深度因所用材料而不同 - 通常非晶态热塑性材料由于粘度 较高,要求的气孔深度较大。
  The pore depth varies depending on the material used - usually amorphous thermoplastic materials require a larger pore depth due to their high viscosity.

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