MuCell 基础 [兼容模式]

MuCell®Basics M C ll B i MuCell基本原理

什么是MuCell

What is MuCell •MuCell是一种发泡技术MuCell is a

foaming technology

–把微细胞加进塑胶零件薄壁之内

Putting small cells into a thin

wall plastic part

要以氮气为发泡剂

•主要以氮气为发泡剂

Primarily using nitrogen as the

foaming agent

–有时可二氧化碳(CO2)

–Sometimes carbon dioxide

为什么择用

•为什么MuCell能做到较佳之细胞结构

Why

Why MuCell

MuCell

Why better cell structure with Micelle

–直接加入物理性发泡剂,以可容许较大量发泡剂被添进

Direct introduction of physical foaming agent allows for higher level of actual foaming agent

•氮气(N2)或二氧化碳(CO2)

Nitrogen or carbon dioxide

–较大量发泡剂产生更多细胞

Higher level of foaming agent creates more cell sites

–细胞可均匀地生长以及保持细小

Cells grow uniformly keeping them small

•如何做到

How does this happen

–气体管理设备

Gas management equipment

•设备为本之技术

Equipment based technology

-SCF传输系统

SCF Delivery System –MIK(MuCell 介面装置)

MIK (MuCell Interface Kit) –螺杆/料管组合

Screw/Barrel Assembly

•基本步骤

Basic Steps

–在注入SCF之前把塑料熔掉

Melt plastic prior to SCF injection

–在螺杆转动期间注入SCF

j g

Inject SCF during screw rotation

–把SCF溶入塑料熔融之中(单一相熔体)

Dissolve SCF into the polymer melt (single phase

solution)

sol tion)

Inject SCF

Dissolve SCF

注入SCF

溶合

Melt Polymer

溶解塑胶料

•溶解SCF

Di l i SCF

Dissolving SCF –螺杆剪切段把SCF 切碎

Screw flights break up SCF stream

–螺杆混合段把SCF 切成更微细气泡,以及把SCF 溶解于塑料中Mixing flights cause SCF to break into smaller bubbles and then dissolve

Inject SCF Di l SCF Inject SCF

Di l SCF

Dissolve SCF Diffusion

Dissolve SCF Diffusion Complete

+

SCF Polymer

MuCell

设备

•一旦SCF

MuCell Equipment

溶入聚合物熔融,须确保料筒内压力得以维持

Once the SCF is dissolved into the molten polymer it must be kept under pressure

•在注塑机来设置即指

In the molding machine this means

–螺杆位置控制Screw position control

–封闭式注射咀Shutoff Nozzle

•在模具上

In the mold

–热流道模具之针阀式浇口

Valve gates for hot runner molds

在模具腔内发泡

模腔内之低压令Foaming in the Mold

•SCF 产生细胞

Low pressure in the mold cause SCF to form cells

Time

•细胞不断地成生.持续到物料凝固或模腔被填充满

Cells grow until the material freezes or the mold it i f ll

cavity is full

控制发泡

Controlling Foaming

C t lli F i

•细胞尺寸以及数量之控股

Controlling Cell Size and the number of cells

–填充物份量(%)以及种类

Filler level and type

Fill l l d t

•玻璃纤维较佳Glass is preferred

–正确SCF水平Correct SCF level

•更高的SCF创造更多细胞

Higher SCF creates more cells

-对每种物料,有不同的SCF水平上限

Always a limit to how much SCF

–(主要控制由注射速度)

压降的减少

Rate of pressure drop (controlled primarily by injection speed)

•如摇晃一瓶苏打水导致更多泡沫

Shaking a bottle of soda results in more foaming