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1、- 1 -塑料塑料塑料塑料 制品设计制品设计制品设计制品设计 基础基础基础基础 Part Design Basic针对针对针对针对 注塑成型注塑成型注塑成型注塑成型 的设计的设计的设计的设计 考量考量考量考量Design Considerations for Injection MoldingPCS ARD APAC P&D Technology - CAE Roy Zhu / Jul-2009- 2 -塑塑塑塑料制品设计考量 料制品设计考量料制品设计考量料制品设计考量 Plastic Part Design Considerations功能功能功能 功能 FunctionalCan the
2、part fulfill the expected functions? Plastic PartDesignTODAYS FOCUSPlastic part design for injection molding!(针对注塑成型的设计考量针对注塑成型的设计考量针对注塑成型的设计考量针对注塑成型的设计考量 )PCS ARD APAC P&D Technology CAE- 3 -针对注塑成型的设计考量针对注塑成型的设计考量针对注塑成型的设计考量针对注塑成型的设计考量 Design for Injection Molding针对针对针对 针对注塑成型 注塑成型注塑成型注塑成型基本基本基本 基本
3、设计 设计设计 设计考量 考量考量 考量Design forInjection Molding壁厚 wall thickness加强筋 rib螺丝套 boss 脱模斜度 draft尖角 sharp corner倒 扣 undercut 刻字 LetteringPCS ARD APAC P&D Technology CAE- 4 -壁厚壁厚壁厚壁厚 可成型性可成型性可成型性可成型性 Moldability Flow length Wall thickness appropriate 合适的流程 -壁厚比 Flow length is the distance from gate to the l
4、ast area filled. 流程是指由浇口至最后填充位置之间的距离。 Flow length depends on the part dimension, number of gates and positions of gates.流程的大小取决于制品尺寸,浇口数目,和浇口位置。 For a given flow length, the thinner the wall, the higher the pressure required. 在流程不变的情况下,壁厚越薄，所需注射压力也越大。PCS ARD APAC P&D Technology CAE- 5 -填充压力填充压力填充压力填
5、充压力 vs 流程流程流程流程 Injection Pressure vs Flow LengthPCS ARD APAC P&D Technology CAE- 6 -例子 Example3mm thick 250mmPCS ARD APAC P&D Technology CAE- 7 - Always maintain uniform wall thickness if possible. 在可能的情况下，最好用一致的壁厚 一致的壁厚一致的壁厚一致的壁厚。 Consider “coring” in thick area to create a more uniform thickness.
6、考虑在厚壁处掏空 掏空掏空 掏空以令壁厚比较均匀。 When thickness variation can NOT be avoided, please consider 在壁厚变化不可避免的状况，应考虑 Keep the variation W 30oo30 W 2 dd dd = 0.25 mm (Max.)Recommended lettering design (profiles)推荐的刻字设计推荐的刻字设计推荐的刻字设计推荐的刻字设计（ （ （剖面图 剖面图剖面图剖面图） ） ）PCS ARD APAC P&D Technology CAE- 43 -ExamplePCS ARD
7、APAC P&D Technology CAE- 44 -Design for Injection molding Check list注塑成型制品注塑成型制品注塑成型制品注塑成型制品设计 设计设计 设计 - - 基本基本基本 基本检查项目 检查项目检查项目检查项目 Wall thickness 壁厚壁厚壁厚 壁厚 Is it too thin for injection molding?是否太薄是否太薄是否太薄是否太薄, , 难以难以难以 难以填充 填充填充 填充？ ？ ？ Is there any excessive thickness variations? 厚厚厚 厚度变化 度变化度变
8、化度变化是否 是否是否 是否过大 过大过大 过大？ ？ ？ Is there any think sections?部分位置有否部分位置有否部分位置有否部分位置有否过厚 过厚过厚 过厚？ ？ ？ Ribs/Bosses 加強筋加強筋加強筋加強筋/ /螺丝套螺丝套螺丝套螺丝套 Are they too thick?是否太厚是否太厚是否太厚是否太厚？ ？ ？null Risk of sink marks可能可能可能 可能出现缩痕 出现缩痕出现缩痕出现缩痕 Are they too thin and/or too long?是否太薄是否太薄是否太薄是否太薄/ /太太太 太长 长长 长? ?null
9、Risk of short shots可能可能可能 可能出现 出现出现 出现短射 短射短射 短射 Undercut 倒扣倒扣倒扣 倒扣 How does the undercut being ejected?倒扣部位如何顶出倒扣部位如何顶出倒扣部位如何顶出倒扣部位如何顶出 ？ ？ Sharp Corners 尖尖尖 尖角 角角 角 Is there any sharp corner?是否有是否有是否有是否有尖 尖尖 尖角 角角 角? ? Is it in critical areas?是否在不利是否在不利是否在不利是否在不利位置 位置位置 位置? ? Is it necessary to ad
10、d radius?是否是否是否 是否需要 需要需要 需要增加 增加增加 增加圆角 圆角圆角 圆角? ? Draft 脱脱脱 脱模斜度 模斜度模斜度模斜度 Is there any draft ( 0.5)?已有已有已有 已有脱模 脱模脱模 脱模斜度 斜度斜度 斜度 ( ( 0.5 ) )? Is it necessary to use a larger draft?是否是否是否 是否需要 需要需要 需要增加 增加增加 增加脱模 脱模脱模 脱模斜度 斜度斜度 斜度? ? Lettering 刻字刻字刻字 刻字 Is the depth/draft of lettering acceptable?
11、 字的深度字的深度字的深度字的深度/ /斜度是否合理斜度是否合理斜度是否合理斜度是否合理? ?PCS ARD APAC P&D Technology CAE- 45 -PCS ARD APAC P&D Technology CAEDisclaimer: The manner in which you use and the purpose to which you put and utilize Bayers products, technical assistance and information (whether verbal, written or by way of producti
12、on evaluations), including any suggested formulations and recommendations are beyond Bayers control. Therefore, it is imperative that you test Bayers products, technical assistance and information to determine to your own satisfaction whether they are suitable for your intended uses and applications
13、. Such application-specific analysis must at least include testing to determine suitability from a technical as well as a health, safety, and environmental standpoint. Such testing has not necessarily been done by Bayer. All information and technical assistance is given without warranty or guarantee
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