finishing requests such as sand blasting, vapor honing, buffing, etc. Table 4-3 lists many industry finishes and their related manufacturing methods and typical applications Table 4-3: typical manufacturing methods and application of various mold part finishes Finish Manufacturing method pecify Typical application requir 0.025 0.025 Petri disk Optical quality 900 stone 0.05 and buff Test tube 8000 diamond Polish 900 stone 0. 08 and buff Crystal tumble 3000 diamond Polish 0.10 600 stone 0. 1 and buff Opaque 3000 diamond shiny surfaces Polish 0.100 20 900 draw stone 0.100.20 Opaque surfaces 900 draw stone and vapor 0.100 20 and Matte surface 0. 100. 15 900 draw stone and vapor 0.100. 15 and Semi-opaque vapor Finish 0.2 600 draw stone 0. 2 and buff General purpose 3000 diamond buff 0.2" 600 stone and sand. 20.3 and Technical product sand blast unspecified finis Texture finish Even where only one or just a few areas require finishing specifications, symbols and notes are used to indicate the finish, rather than placing written specifications directly on the affected surface. It also may be necessary to show limits for a finished area, as shown in Fig. 4-20 0. 05& buff 0.1 buff note 0.1 buff ●:●005和摆 a)symbol at surface area and types of notations b) limitations accompanying finishing notation Fig. 4-20: finishing symbols on a drawing If the mold part has several areas that require finishing specs, each surface to be finished will require a symbol pointing at it. The shape of symbols is left to the designer, and the meaning of each symbol must be explained in notes. Many typical symbols are shown in Fig. 4-21. There is no standard meaning attached to these symbols. Each must be explained every time it is used on a drawing. Other shapes may also he used, as long as it becomes clear to which surface they apply
finishing requests such as sand blasting, vapor honing, buffing, etc. Table 4-3 lists many industry finishes and their related manufacturing methods and typical applications. Table 4-3: typical manufacturing methods and application of various mold part finishes Finish required/µm Manufacturing method Specify Typical application 0.025 Lapping 8000 diamond 0.025 Petri disk, Optical quality 0.05 900 stone 8000 diamond Polish 0.05 and buff Test tube 0.08 900 stone 3000 diamond Polish 0.08 and buff Crystal tumbler 0.10 600 stone 3000 diamond Polish 0.1 and buff Opaque, shiny surfaces 0.10~0.20 900 draw stone 900 draw stone and vapor hone 0.10~0.20 0.10~0.20 and vapor hone Opaque surfaces Matte surface 0.10~0.15 900 draw stone and vapor hone 0.10~0.15 and vapor hone Semi-opaque Finish 0.2 600 draw stone 3000 diamond buff 0.2 and buff General purpose 0.2~0.3 400~600 stone and sand blast 0.2~0.3 and sand blast Technical product, unspecified finish Texture finish Even where only one or just a few areas require finishing specifications, symbols and notes are used to indicate the finish, rather than placing written specifications directly on the affected surface. It also may be necessary to show limits for a finished area, as shown in Fig. 4-20. a) symbol at surface area and types of notations b) limitations accompanying finishing notation Fig. 4-20: finishing symbols on a drawing If the mold part has several areas that require finishing specs, each surface to be finished will require a symbol pointing at it. The shape of symbols is left to the designer, and the meaning of each symbol must be explained in notes. Many typical symbols are shown in Fig. 4-21. There is no standard meaning attached to these symbols. Each must be explained every time it is used on a drawing. Other shapes may also he used, as long as it becomes clear to which surface they apply. 0.1 & buff or Note: 0.1 & buff Note: 0.05 & buff
Surf表面 typical finishing symbols used on mold drawings 4.4.2 Special Textures Textures such as basket weave, leather grain, etc, are usually produced by suppliers specializing in texturing, which is a chemical etching process involving the removal of material from the surface on which the texture is applied. The texture itself is defined by referring to sample chips, identified by names and /or numbers. Unless it is obvious, the designer must specify the area limits of the texture and show the depth of the texture from the surface to which it If not properly indicated on the product drawing, Fig. 4-22 shows clearly w Fig. 4-22a), the height h of the produc des the texture; in Fig. 4-1lb), the texture is added to the height h. Since the depth of textures is usually 0.050 10 mm, or even more, an error in specifying the depth of the etching may affect the product height and appearance significantly, and Texturized surface 力=? a)Texture depth is not indicated b) Texture depth d may be included in height h c)Texture depth d may be added to height h Fig. 4-22: part drawing does not indicate depth d, and two results are possible Note that the etching process starts from the surface of the mold part and sinks into the steel his depth d must be specified. It can be shown with di Imension lines. as shown in Figure 16-4 or with a note next to the texture specification 1. EDM texturing elen or texturing, or any other pattern that can be machined into the electrode with EDM, the ctrode requires the finish as specified for the molding surface. During the EDM process, the electrode is then sunk into the often already hardened mold steel
Fig. 4-21: typical finishing symbols used on mold drawings 4.4.2 Special Textures Textures such as basket weave, leather grain, etc., are usually produced by suppliers specializing in texturing, which is a chemical etching process involving the removal of material from the surface on which the texture is applied. The texture itself is defined by referring to sample chips, identified by names and / or numbers. Unless it is obvious, the designer must specify the area limits of the texture and show the depth of the texture from the surface to which it is applied. If not properly indicated on the product drawing, Fig. 4-22 shows clearly what can happen. In Fig. 4-22a), the height h of the product includes the texture; in Fig. 4-11b), the texture is added to the height h. Since the depth of textures is usually 0.05~0.10 mm, or even more, an error in specifying the depth of the etching may affect the product height and appearance significantly, and may lead to scrapping of the mold part . a) Texture depth is not indicated b) Texture depth d may be included in height h c) Texture depth d may be added to height h Fig. 4-22: part drawing does not indicate depth d, and two results are possible. Note that the etching process starts from the surface of the mold part and sinks into the steel. This depth d must be specified. It can be shown with dimension lines, as shown in Figure 16-4, or with a note next to the texture specification. 1. EDM texturing For texturing, or any other pattern that can be machined into the electrode with EDM, the electrode requires the finish as specified for the molding surface. During the EDM process, the electrode is then sunk into the often already hardened mold steel. Surface