SINGLE TEMP VARIOTHERM TEMPERATURE CONTROL
ATT - ALTERNATING TEMPERATURE TECHNOLOGY
HIGH-SPEED HEATING & COOLING FOR ADVANCED MOLD TEMPERATURE CONTROL
Single Temp Variotherm Temperature Control systems are advanced, engineered temperature control solutions capable of actively changing mold surface temperature throughout the production cycle in plastic injection molding and other mold-based manufacturing processes. Operating on the Alternating Temperature Technology (ATT) principle, these systems enable different temperature profiles during mold filling, packing, and cooling phases, effectively eliminating the limitations of conventional temperature control methods.
Variotherm technology provides a critical process advantage in applications requiring high surface quality, weld-line-free parts, low internal stress, and short cycle times.
OPERATING PRINCIPLE OF THE VARIOTHERM (ATT) SYSTEM
Single Temp ATT systems feature a structure that uses two separate temperature circuits (hot and cold) within the same mold, alternately activated via hydraulic switching.
The system operates as follows:
• During injection and filling, the mold surface is maintained at a high temperature
• Melt flowability is increased, minimizing weld lines and surface defects
• After the packing phase, the system automatically switches to the cold circuit
• The mold is rapidly cooled and the cycle is completed
These transitions are executed fully automatically, synchronized with the molding process, and without any need for manual intervention.
Thanks to ATT technology, temperature differences exceeding 100 °C can be generated inside the mold within very short time intervals.
ADVANTAGES OF ATT - ALTERNATING TEMPERATURE TECHNOLOGY
Compared to conventional temperature control units, Single Temp Variotherm systems offer numerous process advantages:
• Eliminates weld line formation
• Delivers high-gloss and piano-black surface quality
• Reduces internal flow resistance inside the mold
• Requires lower injection pressure and clamping force
• Minimizes internal stresses, improving part stability
• Enhances quality in thick-walled and optical components
• Increases production efficiency through shorter cycle times
These advantages make Variotherm systems indispensable for high value-added plastic part production.
SINGLE TEMP VARIOTHERM (ATT) PRODUCT SERIES
The Single Temp Variotherm Temperature Control product family is configured to meet different temperature and capacity requirements.
ATT N1 SERIES
• Maximum operating temperature: 180 °C
• Dual-circuit temperature control architecture
• Water or oil-based thermal fluid compatibility
• Ideal for medium- and high-precision applications
ATT S SERIES
• Maximum operating temperature: 180 °C
• Structure optimized for large mold volumes
• High heat transfer capacity
ATT H SERIES
• Maximum operating temperature: 200 °C
• Designed for high-temperature mold and composite applications
• Large flow capacity and high pump performance
All series can be supplied with custom configurations based on specific process requirements.
TECHNICAL AND NUMERICAL SPECIFICATIONS
Maximum Operating Temperature
• ATT N1 / S Series: 180 °C
• ATT H Series: 200 °C
Temperature Change Capability
• Temperature difference of over 100 °C in critical mold areas
Heating Capacity
• 18 - 48 kW, model dependent
Cooling Capacity (80 °C / 65 °C cooling water)
• 150 - 220 kW
Maximum Flow Rate
• 15.9 - 39.6 gpm (60 - 150 l/min)
Maximum Outlet Pressure
• 6 - 7.5 bar
Pump Power
• 1.3 - 3.0 HP
Circuit Design
• Separate hot and cold circuits
• Rapid switching via hydraulic valve station
Control System
• PLC-based control
• Touchscreen user interface
• Time-, temperature-, and cycle-based parameter management
• USB data logging support
Electrical and Safety Features
• Solid-state relay-controlled heating
• Electronic safety temperature limiter
• IP54-rated control cabinet
HYDRAULIC AND MECHANICAL DESIGN
• High-quality hydraulic components
• Wear-free flow measurement systems
• Compact valve station aligned close to the mold
• Modular design for easy system integration
• Industrial steel housing ensuring long service life
The system can be installed next to the mold or within a centralized temperature control area.
APPLICATION AREAS
Single Temp Variotherm Temperature Control systems are widely used in the following applications:
• Plastic injection molding
• Optical and high-gloss surface components
• Thick-walled technical parts
• Glass-fiber reinforced composites
• Micro-structure and nano-surface applications
• Thermoset and advanced composite processes
PROCESS BENEFITS OF SINGLE TEMP VARIOTHERM SYSTEMS
ATT technology is not merely a temperature control solution; it is a strategic process technology that directly determines production quality and efficiency. Reduced scrap rates, superior surface quality, and shorter cycle times significantly shorten return-on-investment periods.
