设计指南-晒纹篇

Design Guidelines-Choosing a surface finish/设计指南-晒纹篇

2007-4-28 17:22:41

When designing a part for injection molding, it is important to keep in mind the relationships between surface finish, moldability, cost and lead time.

当设计一个组成部分注塑,这是很重要的,记住这一关系表面处理,moldability、成本和交货时间。

Figure 1 contains the list of standard surface finishes available through Protomold's rapid injection molding service, listed in order from lowest to highest cost. 图1包含串标准化的表面镀层可通过Protomold的快速成型服务依次从低到高的成本。

Figure 1: List of available standard finishes PM-F0: Non-cosmetic—finish to Protomold discretion PM-F1

Low-cosmetic—most toolmarks removed

SPI-C1: 600 grit stone, 10-12 Ra

Higher Cost

SPI-B1: 600 grit paper, 2-3 Ra

PM-T1: Protomold texture, SPI-C1 followed by light bead blast PM-T2: Protomold texture, SPI-C1 followed by medium bead blast SPI-A2: Grade #2 Diamond Buff, 1-2 Ra

\in the table signifies a surface finish adjusted to fit the rapid injection molding process, where SPI (The Society of the Plastics Industry) denotes an industry-standard finish.

“点”象征着桌子表面光洁度调整以适应快速注射成型工艺,在那里SPI(塑料工业的社会)表示有灵活的完成。

The photographs shown in Figure 2 illustrate the difference in cosmetic appearance for a few of these options on some example parts.

如图2所拍的照片,外观上的差异,说明了几个这样的选择在一些例子说明部分。

Figure 2: Surface finish examples

If the part will not be visible to the end user, you will probably choose to specify either PM-F0 or PM-F1 using the drop-down menus on your ProtoQuote (see sample). But many times your design will require a more cosmetic surface finish. In these cases there are two key things to keep in mind:

若部分将是不可见的终端用户,你可能选择指定PM-F0或PM-F1也在你使用下拉菜单ProtoQuote(参考范例)。但是许多次以后你的设计需要一个更加化妆品表面光洁度。在这些情况下有两个关键因素要牢记:

Polishing: Smoother part surfaces are achieved using manual mold polishing techniques. Consider a part with tall, thin and curved ribs which need to have an SPI-A2 finish. In this case you should expect a significant cost increase because it is very time consuming to polish deep, narrow slots in molds. And such lengthy polishing times may also affect the lead time for your parts, potentially making it impossible for Protomold to accept your order for our famous 5-day turn.

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?抛光:光滑表面部分采用手动了模具抛光技术。考虑一个部分肋骨又弯又高又瘦,需要有一个SPI-A2完成。在这种情况下,你应该期望一个显著的成本增加,因为它是非常耗时的抛光深,狭窄槽孔的模具制作。漫长的抛光次,也会影响筹建时间为你的部分,可能会使我们不能接受您的订单Protomold为我们的著名的5天的转动。

Texturing: Given the line-of-sight nature of bead blasting, it may not be possible to texture the sides of minimally drafted ribs on a part because the mold surfaces may be inaccessible. In addition, if the walls of your part are textured it may have an adverse effect on the ability of the part to release from the mold, potentially resulting in unsightly \reasons we recommend that texture be specified only on areas of the part that are drafted at least 2-3 degrees. And in fact, if your part does not have sufficient draft your ProtoQuote may not even offer these textures as options for you to select (contact your Customer Service representative if this ever becomes an issue).

? ?贴图:分析了视线,珠光处理的本质是不可能的两侧贴图肋骨上最小起草部分原因是模

具表面可能无法识别。另外,如果你的部分墙壁粗糙的可能会有一个不利影响部分的能力释放从模具,潜在导致难看的“拖拉标志”。由于这些原因,我们建议纹理被指定只有在地区制定的部分至少有2 - 3度。而事实上,如果你的部分没有足够的草案ProtoQuote可能甚至都没有提供你所选择的这些贴图,选择(联系你的客户服务代表如果你一直会变成一个问题)。

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