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Wednesday, 30-Oct-2013 21:33 Email | Share | Bookmark
Heating Elements for Hot Runner Mold Systems: Tubular Heaters

When picking replacement parts for your heating system, cost should not be as important as many companies make it. The cost of heating elements between a good manufacturer and a bad one is negotiable, as compared to the total financial investment. The production time and quality of the parts gotten by picking a reputable manufacturer will more than make up the difference. Bearing in mind the following suggestions when picking a manufacturer will ensure less downtime due to a faulty product.

Manifold Heater and Cartridge Heater.

Cartridge heaters are used around the flow channel to ensure uniform temperatures. It is very important to keep the distance between the heaters and the manifold equal or greater than 1x the diameter of the heating element.

Thermocouple placement should be located equally distanced between the heating element and the flow channel, and should be set deep to ensure an accurate reading.

If an internal thermocouple is used, it is very important to guarantee that it is located towards the center of the heating element, depending upon whether the controller is grounded or ungrounded.

Some of the most common reasons for failure include:

Lead short out.

This can be fixed by changing the lead type. If fiberglass leads were used, this might be the source. Hot runners by nature produce gases, which with time, saturate the fiberglass material, causing it to short out between the leads. Depending on the ambient temperature around the lead area, Teflon leads can be used to correct this, as they are more resistant to gases.

Internal thermocouple not reading correctly.

This can be caused by two different reasons. One reason is the thermocouple has to be located in the center of the heating element. If not, you will never acquire a correct temperature of the flow channel. The other reason is whether or not the unit is grounded or ungrounded. Consult your controller manufacturer to determine this.Westlake Air Conditioning Repair\nGo to


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