Français
6. Impression feed modes
The way in which a mold cavity is fed has a decisive influence on the quality and price of injected parts. The mold cavity can be fed with cold runners, where the material is frozen at the moment of ejection, or hot runners, where the material remains in a molten state at the moment of ejection.
6.1 Cold runner injection
In the oldest and simplest feeding method, the molten polymer flows directly into the cavity via a truncated cone-shaped channel, the contents of which are called a sprue. When the mold has several cavities, filling is carried out from the central channel into a network of distribution channels that feed the cavities via weirs. Along the way, the material cools and gradually solidifies as the pressure drops.
The sprue,...
The Ultimate Scientific and Technical Reference
This article is included in
Plastics and composites
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Impression feed modes
Special molds
Bibliography
Software tools
Cadmould®
Autodesk Moldflow
https://www.autodesk.fr/products/moldflow/overview
Simpoe-Mold
...Events
Forum International de la Plasturgie, takes place every three years in Lyon :
K-Messe, Europe's leading plastics trade fair, takes place every three years in Düsseldorf:
Standards and norms
- Moulding tools – Compression molding components, injection molds and diecasting molds – Terms and symbols. - NF ISO 12165 - Avril 2020
- Moulding tools – Thermal insulation foils in injection molds. - NF ISO 15600 - Avril 2001
- Moulding tools – Tool specification form for injection molds. - NF ISO 16916 - Mai 2016
- Compression molding and injection molds – Components for injection systems. - NF ISO 28238...
Directory
Cumsa
DME-EOC
Dynisco
Ewikon
The Ultimate Scientific and Technical Reference
