plastic injection molding using insulated runner molds, an excellent option when a large number of plastic parts need to be manufactured quickly.
Advantages Over Hot Runner Systems
Properly designed insulated runners, 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 to clean
Fast production color changes
Molds are less expensive to build and to maintain than hot runners
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
Insulated runner systems are inexpensive alternatives to traditional hot runners, where the mold is not heated, but the runner channels are extremely thick and stay molten during continuous cycling.
This feature provides the flexible gating advantages of hot runners without the added cost of the manifold and drops of a heated hot runner system.
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
About First-rate Mold Solution Co. Ltd.
First-rate Mold Solution Co., Ltd. is based in China and engaged in supply of industry design,mold design,mold manufacturing,molding analysis,project management service,Our team has rich experience in the mold industry, We have first-class engineers in the fields of mold design, injection molding, metal stamping, metal die-casting, hot press molding and etc, we are enthusiastic to our industry and sufficiently inquisitive to learn，eternal adherents of leading-edge technologies in industrial design and manufacturing, such as the Mold technology in the United States, Germany mold technology, the mould technology in the United Kingdom, France mould technology,Italy mold technology, Japan mold technology and so on.
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