科學(xué)化射出成型_-文庫吧資料
2024-08-14 16:58本頁面
【正文】 C u r v e , D e te r m in e s O p tim u m F ill Tim e 黏度曲線 ,決定最佳注入時間1 0 . 6 95 . 2 72 . 2 01 . 2 70 . 6 60 . 4 70 . 3 20 . 2 20 . 1 00 . 1 30 . 1 605,00010,00015,00020,00025,00030,00035,00040,00045,000 S h ear R ate 1/ s ec (1/ F ill Tim e)R elativ e V is c o s ityStiff Easy Slow Fast 9 2. Plastic Flow Rate Typical Plastic Flow 典型的塑膠流動 V is c o s ity C u r v e , D e te r m in e s O p tim u m F ill Tim e 黏度曲線 ,決定最佳注入時間1 0 . 6 95 . 2 72 . 2 01 . 2 70 . 6 60 . 4 70 . 3 20 . 2 20 . 1 00 . 1 30 . 1 605,00010,00015,00020,00025,00030,00035,00040,00045,000 S h ear R ate 1/ s ec (1 / F ill T im e)R elat iv e V is c o s ityStiff Easy Slow Fast Non Newtonian Mixed Newtonian 10 2. Plastic Flow Rate Newtonian fluids can be defined as those for which viscosity is a constant regardless of shear stress or rate of shear. 牛頓流體 可被定義為黏度是一個常數(shù) ,不隨著剪切應(yīng)力或剪切率變化的流體。 freeze to wall, thus forming frozen 、凝固在側(cè)壁 ,形成凝固層 ? Directly proportional to shear rate。 A d m i n15%塑料 P l a s t i c43%利潤 P r o f i t5%5 Effect of Cycle Time on Profit (成型周期對利潤的影響 ) Part Weight (gm)(部件重量 ) Material(材料 ) Approx Cost per lb( 1b的大約成本 ) Material Cost – Cents (物料成本 —分 ) Cycle Time(周期 ) Machine Rate $/hr(機械速率 ) Cycle Time Cost – Cents (周期成本 —分 ) Actual Plastic Cost(實際塑料成本 ) Overheads and Labor(管銷和人力 ) Profit at 5% Cents(利潤 5%)分 Percent of Quoted Price Profit(報價利潤率 ) 50 PC/ABS $ $ 100 50 PC/ABS $ $ 50 PC/ABS $ $ 1. Introduction 6 1. Introduction Four Critical ponents to make a good part 做出好成品的四大重要成分 ? Part Design(成品設(shè)計 ) ? Material selection and handling(材料選擇和處理方式 ) ? Tool design and construction(模具設(shè)計和結(jié)構(gòu) ) ? Processing(加工制程 ) In Processing, the four main plastic variables (加工中的四大塑料變異因素 ) ? Plastic Flow Rate(塑料流動率 ) ? Plastic Pressure塑料壓力 ? Cooling Rate amp。Symbol Technologies Scientific Injection Molding 科學(xué)化射出成型 (Process Optimization) (過程最優(yōu)化 ) Johnny Singh 2 CONTENTS內(nèi)容 1. Introduction簡介 2. Plastic Flow Rate塑料的流動率 3. Plastic Pressurel 塑料的壓力 4. Cooling Rate and Time冷卻的速率和時間 5. Plastic Temperature塑料的溫度 6. Characteristics to Monitor塑料 特性之監(jiān)控 7. Molding Window optimizationl 成型窗口最優(yōu)化 8. Appendix附注 3 1. Introduction Scientific Injection Molding ? Ensures that identical parts are produced consistently independent of the normal machine to machine, day
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