The achievement of injection molding depends on the intricate management of many parameters. The seemingly innocuous process of drying and handling plastic resins is one of the very vital steps frequently overlooked. Moisture absorption can lead to the beginning of a chain that results in substandard product quality, packaging consistency, and production inefficiencies.

1. Advancements in Plastics Drying
and Material Handling
Aero Dry · Follow
3 min read · Just now
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The achievement of injection molding depends on the intricate management
of many parameters. The seemingly innocuous process of drying and
handling plastic resins is one of the very vital steps frequently overlooked.
Moisture absorption can lead to the beginning of a chain that results in
substandard product quality, packaging consistency, and production
inefficiencies.
This article explores two key advancements in plastic drying and material
handling specifically designed for injection molding: hot air dryers and
hopper dryers. The role of the machine in the process and what benefits
they have will be discussed, as well as what contribution they make to high-
quality and well-performed molding.
Hot Air Dryers: A Simple and Effective Option
Hot air blow dryers can be used to dry resins that have low moisture
recovery characteristics with a very high economy. Here’s how they work:
Heated Air Circulation: The blower unit draws ambient air, which is then
driven through an infrared quartz heating element.
Filtration: The heating of air brings it through a filter so that the resin would
not be contaminated with any dust and other contaminants in the air.
Drying Hopper Integration: The heat is directed to a dehumidifier, which is
of a kind with a hopper that has plastic particles.
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2. Moisture Removal: The hot air dryer for plastic pellets absorbs moisture
and convects vapor through a vent exhaust.
Hot air dryers are best for non-sterile resins such as polyethylene (PE),
polypropylene (PP). They are:
Simple to Operate: The user picks the drying temperature desired, and the
system will reflexively keep it maintained.
Energy-Efficient: The energy consumption of hot air dryers is much cheaper
than other efficient technologies for drying a low-moisture resin.
Cost-Effective: This technology, due to it being very easy to use, leaves a
smaller investment in the customers than the one which is more
complicated.
Hopper Dryers: Drying of Hydrophilic Resins for a Reliable Boiling
More often than not, both hygroscopic and chemically active resins with a
high moisture-attracting affinity would have to use the hopper drying
alternative. Here’s a breakdown of their operation:
Desiccant Dehumidification: The Desiccant wheel or bed takes away the
wetness from the air that is moving in the system. Dry matter is water-like
material that immediately absorbs moisture, humidity or other liquids if
they are present.
Closed-Loop System: Unlike conventional air blowers, Hopper dryer
injection molding lets the heat in into a closed space. By doing so, the air is
dehumidified and is perpetually recirculated inside the hopper; thus, we
guarantee high efficiency in terms of the drying process.
Heated Air Regeneration: The desiccant gets regenerated by heating it at
intervals, which has the effect of displacing the absorbed water. As a result,
the adsorption process by the silica gel continues effectively as it absorbs
water vapor from the ambient dry air.
Advantages of hopper dryers include:
Broader Application: Drying of both wet hygroscopic and dry non-
hygroscopic compositions can occur in an oven dryer.
Precise Drying: Hopper dryer injection molding gives more exact control
over the process when drying resin, which results in getting the same level
of moisture in its composition.
Reduced Cycle Times: The superior fast-drying abilities of hopper dryers can
greatly reduce injection molding cycle times.
In Conclusion
Hot Air Dryer For Plastic pellets and hopper dryers for injection molding
pave the way for the introduction of innovative technologies that lead to the
optimization of production processes and help maximize efficiency while
cutting down on costs and boosting product standards. However,
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3. manufacturers choosing Aerodry have immediate access to cutting-edge
expertise and support from a well-versed business in today’s ever-
competitive market.
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Written by Aero Dry
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Aerodry’s Plastics Auxiliary Equipment and system solutions are widely used for Polymer
and Plastic processing in various industry
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