切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 3847阅读
    • 1回复

    [转载]plastic design [复制链接]

    上一主题 下一主题
    离线anvils
     
    发帖
    2
    光币
    5
    光券
    0
    只看楼主 倒序阅读 楼主  发表于: 2008-01-17
    Design Tips for Rapid Injection Molding v4VP7h6uD)  
    As illustrated in figure 1, draft is the angle between the direction of ejection of a part from the mold and the surface of the part. Its traditional function is to facilitate the removal of the part from the mold, but in Protomold’s Rapid Injection Molding process, it also permits deeper geometries to be milled while reducing cost and insuring trouble free molding. Drafts of 1.0 degree and larger may result in lower costs with the Rapid Injection Molding process. O"emse}Z  
    It is important that textured surfaces have adequate draft to prevent the part from sticking in the mold and to prevent “drag” marks. Protomold requires that lightly textured surfaces (T-1) have a minimum of 3 degrees of draft and that more heavily textured surfaces (T-2) have a minimum of 5 degrees of draft. +K:hetv  
    Another example of the importance of draft in the manufacturability of your design is illustrated in figure 2. In this case the draft not only helps the part eject from the mold more easily, but it also minimizes the amount of sliding required between the mold’s telescoping shutoff surfaces. A minimum of 3.0 degrees of draft is required for telescoping shutoff features. :|N(:W>=$Y  
    Draft your way to a better part .Lp\Jyegs  
    ©2007 Protomold. All rights reserved. Volume 1 n Draft your way to a better part n 3 sh;>6xB  
    It is important that textured surfaces have adequate draft to prevent the part from sticking in the mold and to prevent “drag” marks. L+Q.y~  
    Figure 1: Draft definition. kmM- >v  
    Undrafted V%JG :'6L  
    Drafted gUrXaD#  
    Figure 2: Draft can also improve mold life. '\R/-.  
    No draft results in sliding parallel mold surfaces N _|tw  
    Draft results in improved mold shutoff surfaces ~JTp8E9kw  
    Top view ,rWej;CzN  
    Top view
     
    分享到
    在线chengzheng
    发帖
    2278
    光币
    16
    光券
    0
    只看该作者 1楼 发表于: 2020-10-30
    不错,看看