Insulated Runner Mold
BMJ Mold and Engineering builds and maintains high quality insulated runner molds, an excellent option
for rapid, high volume production of
plastic parts.
Learn more:
Choosing
the Correct Molding System
Insulated Runner Molds: Advantages Over Hot Runner Systems
Properly designed insulated runner molds with thermally controlled gates offer several
advantages over hot runner mold systems, including:
- Dependable reproduction – no "dead spots" in mold
- Uniform temperature distribution – thermal insulation forms through melt deposited at the wall
- Economical process for continuous operation of uniform cycles without extended interruptions
- Easy to maintain – quick clean-up
- Fast production color changes
- Molds are less expensive to build and to maintain than hot runners
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- Minimal heat loss – thermal equilibrium reached quickly
- Low energy input on startup – reduces energy cost
- More consistent volume of polymer per part
- Faster molding cycles
- Elimination of runner scrap — less regrind
- Improved part finish
- Decreased tool wear
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Insulated runner systems are inexpensive alternatives to traditional hot runners
- Mold is not heated - reduces energy costs
- Runner channel extremely thick; stays molten
during continuous cycling
- Flexible gating advantages
without the
added cost of heated manifold and drops of a hot runner system
Insulated Runner Molding: Cold Runner Molding Has Advantages
However, as with hot runners, the insulated runner system also has
disadvantages when compared to cold runner molding in certain situations.
The increased level of technology required to manufacture and operate the
insulated mold results in:
- More complicated mold design
- Higher mold costs
- More difficult start-up procedures
- Possible thermal degradation of the polymer melt
- More difficult color changes than with cold runners
Learn more:
Choosing
the Correct Molding System
For a quote or more information about how we can help your project, call 765-457-1166, or send us an email, or submit this short form:
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