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Moldflow simulation high gloss molding solution

using Moldflow to simulate variable mold temperature molding, first of all, we need to understand its molding key and how it shapes high gloss products. First, let's see why the traditionally formed products produce bonding lines. As shown in the figure, two molten plastic wavefronts meet and solidify at the mold wall due to the low temperature and non confluence, resulting in bonding lines - weld lines (bonding lines will affect the appearance and strength of products). Of course, not all bonding lines are visible or the junction that cannot meet the standard measurement requirements is very fragile. This situation occurs only when the temperature at the confluence is low

it can be imagined that if the two strands of molten materials are heated continuously when they meet, so that the melt adhesive does not solidify before the confluence on the mold surface, thus effectively avoiding the generation of weld marks, which is one of the keys of variable mold temperature technology. (the principle is shown in the figure below)

because in the process of variable mold temperature molding, there are two issues of greatest concern: 1 How to optimize the temperature curve; 2. Shorten the forming cycle. In view of these characteristics, Autodesk Moldflow insight simulates high gloss molding, and its setting method introduction metal tensile testing machine can be called tensile testing machine for metal as follows:

select the variable temperature area mesh (multiple temperatures can be set in multiple areas)

otherwise, the fixture operation may cause the twin-screw extruder to have less heat generated by friction, the material is sheared evenly, and the conveying capacity of the screw is large The extrusion volume is relatively stable, the material stays in the barrel for a long time exceeding the service limit of the stroke, causing damage to the equipment

1 Set the temperature change parameter with time

if necessary, different temperature curves can be set at different positions on the product surface. The plastic surface temperature difference between high gloss molding and traditional injection molding is shown in the figure below


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