浇注系统设计.ppt
《浇注系统设计.ppt》由会员分享,可在线阅读,更多相关《浇注系统设计.ppt(86页珍藏版)》请在三一文库上搜索。
1、模具設計的優先順序 Priorities of Mold Design,澆注系統設計 (Filling System Design) 排氣系統設計 (Venting System Design) 冷卻系統設計 (Cooling System Design) 脫模系統設計 (Ejecting System Design),澆注系統設計的優先順序 Priorities of Filling System Design,產品設計 (Part Design) 型腔設計 (Cavity Design) 澆口設計 (Gate Design) 流道設計 (Runner Design) 噴嘴設計 (Nozzl
2、e Design),典型的澆注系統 Typical Filling System,壁厚不均是注塑成型中最大的麻煩製造者。 這對薄壁產品尤然。 這些麻煩包括了遲滯現象、短射、凹陷、發赤、噴流、翹曲及長冷卻時間等;目前都可用CAE以直接或間接的方式預測。 Non-uniform wall thickness is the biggest trouble maker in plastic injection molding. This is especially true to thin-wall part. The troubles, including hesitation, short sho
3、t, sink mark, blush, jetting, warpage and long cooling time etc., can be predicted, directly or indirectly, by using CAE.,壁厚不均 Non-uniform Wall Thickness,壁厚設計 Wall Thickness Design,掏空設計 (1) Coring Out Design (1),掏空設計 (2) Coring Out Design (2),氣泡或/和凹陷的形成 Void or/and Sink Mark Forming,肋厚和內圓角半徑的影響 The
4、Effect of Rib Thickness & Fillet Radius,肋的底部厚度 Bottom Thickness of Rib,肋的設計 (1 ) Rib Design ( 1 ),肋的設計 (2) Rib Design ( 2 ),肋的設計 (3) Rib Design ( 3 ),與側壁相連之凸轂 (熱塑性塑膠) Boss at Wall ( Thermoplastics ),遠離側壁之凸轂 (熱塑性塑膠) Boss Away From Wall ( Thermoplastics ),外側凸轂 Outside Boss,Where 1/r : 樑的曲率 curvature o
5、f the beam M : 彎曲力矩 bending moment E : 彈性模數 modulus of elasticity I : 斷面積對中立軸的慣性矩 moment of inertia of the cross- sectional area with respect to the neutral axis EI : 撓曲剛性 flexural rigidity,撓曲剛性 Flexural Rigidity,A variety of molded-in interlocks can add stiffness to thin-wall housing designs.,各種一體成
6、型的內鎖件 能增加薄殼的剛性。,結構設計是薄殼成型零件的基礎。 Structural design is the base of thin-wall molding parts. 薄殼成型產品不僅僅是一趨勢,而且也是降低成本和提高競爭力的有效途徑。 Thin-wall molding part is not only a trend but also an effective way to achieve cost reduction and competitiveness increase.,結構設計和薄殼成型產品 Structural Design & Thin-wall Molding
7、Parts,熔膠波前推進 Melt-Front Advancement,充填模式,積風和熔接線 Filling Patterns, Air-Traps and Weld Lines Location,熔接線 Weld Lines,材料 Material : PC-GF50,原設計 Original,更改設計 Revised,更改澆口位置以重新定位熔接線 Weld Lines Can Be Relocated By Changing Gate Location,典型對頭熔接線伸張強度保留值 Typical Butt Weld Tensile Strength Retention Values,熔
8、接線冷料井 Weld Slug Well,對頭熔接線 Butt weld,熔接線冷料井 Weld slug well,積風 Air Traps,排氣 Vent,每增加一個澆口,至少增加一條熔接線,同時增加一個澆口痕跡、增加流道的體積以及增加較多的積風。 Every time one gate is added, one weld line, at least, one gate mark, more runner volume and more air traps will be added. 在型腔能夠完滿充填的前提下,澆口數目是愈少愈好。 As long as the cavity is
9、able to be filled appropriately, gates are the less the better. 為了減少澆口數目,每一澆口應就塑流力所能及的流長/壁厚比之內,找出可以涵蓋最大產品面積的進澆位置。 In order to reduce the number of gates, each gate shall be located at where the melt is able to cover maximum part area based on the largest melt flow length/thickness ratio.,澆口數目 The Nu
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 浇注 系统 设计
链接地址:https://www.31doc.com/p-2555502.html