January 1 2005

Simple boring details for a gate insert locked against rotation


January 1, 2005
Simple boring details for a gate insert locked against rotation

Troy, MI USA - Simple boring details for a gate insert locked against rotation. Every now and then the mould maker deliberates whether he should use full bodied end caps or a gate geometry with a “topless” end cap for the hot runner system. Without a doubt the geometry for the full-bodied end cap is easier and more cost-effective to mill into the steel. However if the cavity is directly gated this may compromise the design or the quality of the moulded part.  A larger issue is the relatively high temperature at the front face of the end cap. This elevated temperature leads to imperfections on the moulding surface or sticking in the mold.

These problems can be avoided by using a topless gate, where the plastic material forms additional insulation between the hot runner bushing and the cavity. The disadvantage of this gate type lies in the manufacture of the complex boring dimensions in the mould. Especially with long hot runner bushings, where this geometry has to be made very deep into the mould plate, it is hard to meet the required quality for the boring details.
The gate insert supplied by INCOE International is locked against rotation yet provides for very simple boring dimensions for the mould. There is only three bores to drill and only the front diameter has a fit. The complicated borings, which are necessary for the topless gate, are integrated into this insert. The insert can be installed easily into deep bores with the help of a pin or a shaft. While pressing the insert in it automatically fixes in the bore against rotation without any additional locating pin. Gating on an angled surface or a cold runner that has been machined into the insert face does not present a problem. After disassembly of the insert it can be accurately reassembled in the exact same position.

Simple Boring

About INCOE® Corporation
Since 1958, INCOE® has engineered productivity built hot runner systems starting with their original patented design of the first commercial hot runner nozzle. Today, a wide range of nozzles and manifolds, pre-wired unitized systems, complete hot halves and advanced control technologies provide optimized systems suitable for appliances, automotive, electronics, medical disposables, packaging and technical markets. A network of representatives in over 35 countries are supported by INCOE® facilities located in the United States, Germany, Brazil, China, Hong Kong and Singapore. Wherever your molding operation is, INCOE® can support your business with complete hot runner systems engineered for your application. That's
INCOE® Hot Runner Performance.

For more information:

1740 E. Maple Road
Troy, MI 48083
T (248) 616 0220
F (248) 616 0225

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