Mirco Blog

What is Flow Mark?

Flow marks refer to the obvious flow cracks of melt that can be found near the gate. […]

By |August 15th, 2017|Mirco Blog|0 Comments

Introduction to Ejection Flow Mark

It is a snake-shaped squirt flow formed upon the melt’s entering the cavity with thick walls and large section with excessively high injection rate. […]

By |August 15th, 2017|Mirco Blog|0 Comments

Introduction To Wheel Wave Flow Mark

When melt with unsteady flow is injected into the mold cavity through the runner and gate in semi-solidified state, […]

By |August 15th, 2017|Mirco Blog|0 Comments

introduction to Turbulence Flow Mark

When the melt flows from a runner with narrow section into a cavity with large section or when the runner is very narrow and the surface roughness is rather poor, turbulence flow will form within the runner (including the cavity), thereby resulting in the turbulence flow mark on the surface of plastic parts. […]

By |August 15th, 2017|Mirco Blog|0 Comments

Introduction to Nebulous Flow Mark

The volatile gas produced from the resin in the melt and the lubricating agent under processing temperature is stored in between the melt flow and surface wall of cavity and interferes the flow of melt,

[…]

By |August 15th, 2017|Mirco Blog|0 Comments

Shrink Mark, Depression and Shrinkage Porosity

Both the shrink mark and shrinkage porosity are defects of injection products due to the molding shrinkage at thick walls where no sufficient follow-up compensation is made. […]

By |July 19th, 2017|Mirco Blog|0 Comments

Optimize the structural design of injection products

The injection products should not be too thick and when necessary the stiffening rib can be added to reduce wall thickness; the wall thickness must be kept as uniform as possible and the shape and structure should be simple and symmetric; […]

By |July 19th, 2017|Mirco Blog|1 Comment

Optimize prescription of plastics

Optimize prescription of plastics and preferably use resins with low shrinkage; […]

By |July 19th, 2017|Mirco Blog|1 Comment

Optimize injection technics

Properly improve injection and dwell pressure as well as the injection rate to increase melt’s compression tightness; prolong time of injection and dwell (the freezing of gate should not occur too early) to realize sufficient shrinkage compensation; […]

By |July 19th, 2017|Mirco Blog|0 Comments

Optimize mold design

Properly increase section dimension of gate and runner; the position of gate is set at thick walls of the plastic parts and should be as symmetric as possible; improve mold exhausting condition; […]

By |July 19th, 2017|Mirco Blog|0 Comments