材控专业英语-5.Plastics_forming_and_molds.ppt

5.2.3 Construction of a Compression Mold Words and terms: Asymmetrical 不对称的， Flash 毛刺，飞边， Material residue 料渣 Ejector pin 推杆，顶杆 Multitude 大量，众多 5.2.3 Construction of a Compression Mold A compression mold basically consist of an upper and a lower part. In normal cases the lower half is fitted to the table of the press and the upper half to the ram. 压模基本上包含上半部分和下半部分。通常把模具的下半部分安装在工作台上，上半部分安装在压头上。 Both mold halves are guided by hardened dowel. Asymmetrical parts cause large one sided pressure loads to be exerted on the mold. They require compensation through special guides. 这两部分都是由坚硬的榫钉为导向的。不对称的部分会引起很大的单面压力并施加在模具上。这就需要有补偿力通过特定的导向部件 Ejection usually calls for special equipment. Parts such as flat dishes or plates are easily ejected by compressed air, which is already available on the machine for cleaning flash and material residue form the molds. In all other cases, ejection by ejector pins or ribs is feasible. For parts with a multitude of ribs and openings, ejector pins are essential because of the material shrinkage. 脱模通常需要特殊设备。诸如平盘或碟子就很容易通过压缩空气进行脱模，而压缩空气这种手段本身就用于清理模型的溢料和材料残余物。其他情况下，通过推杆或侧板进行脱模的手段也是可行的。另外，当零件有大量的挡边或开口时，就必须使用推杆，因为材料会收缩。 5.2.3 Construction of a Compression Mold 5.2.4 Construction of a Compression Mold Words and terms: Lathe 车床 Milling machine 铣床 Profiler 仿形铣床 Spark erosion machine 电火花加工铣床 Spark eroded 电火花腐蚀的 Milling head 铣刀头 Copy milling 靠模铣 Fine engraving 精细雕刻 Hobbing 铣刀，齿轮滚铣刀 Aforementioned 前述的 Epoxy resin 环氧树脂 Allowance 加工余量 Stylus 触针，测头 Automatic tracing 自动跟踪 Contour 外形，轮廓 5.2.4 Construction of a Compression Mold The mold consists of case-hardened tool steel for the aforementioned reasons with a glass-hard surface and a tough core. 模具由前述的具有极硬表面和强韧的心部的工具钢组成。 The structure of the mold and all parts not subjected to wear is produced in steel of 600 to 700 N/mm2 strength, equivalent to material no.1.1730. 不承受磨损的模具和所有部件的结构由强度为600 到700 N/mm2的钢生产，相当于1.1730号材料（国产45#钢）。 5.2.4 Construction of a Compression Mold The machin