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User Guide
Chapter 2 Hot Runner Temperature Control
This guide is designed to make sure that you receive the maximum possible benefit from the
use of the Altanium Hot Runner Control Systems.
The Altanium controllers were designed as a processor's tool for hot runner molding. The
fundamental criteria required to operate a hot runner mold is controlling the process
temperature so that it is as consistent and repeatable as possible with respect to the process
setpoint. The closer to the setpoint the process temperature is maintained at, the lower the
setpoint temperature may be set. This equates to less cooling time required (energy in -
energy out), and faster cycle times.
2.1
Types of Temperature Control
The Altanium controller uses two basic types of control:
•
•
2.1.1 Open Loop Control
Without a thermocouple, it is not possible to control the temperature inside the mold, only
the amount of power that is supplied to the heater. The Altanium controller is able to
maintain this power output accurately with a resolution of 1%. This method of control is
called Manual Regulation.
Open loop control is normally associated with tip heaters where the physical size of the tip
precludes the use of an internal thermocouple.
Types of Temperature Control
v 1.4 — September 2015
Open loop control with no thermocouple feedback.
Closed loop control with thermocouple feedback. Closed loop can be sub-categorized
as follows:
•
Internal Thermocouple - Located inside and as part of the heater assembly.
•
External Thermocouple - Located close to but not actually part of a single heater
assembly, and may even be allocated to a group of heaters to form a zone.
Hot Runner Temperature Control
9
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