Dynamic temperature control system DMH

Product overview
DMH (Dynamic Mold Heating) is a variothermal mold temperature-control process that intensely heats the mold wall before injection and rapidly cools it after filling. One or both mold halves can be temperature-controlled depending on process requirements. DMH enables single-shot production of parts with improved surface quality and enhanced material properties.

Benefits

• Reduction or elimination of common injection-molding defects (e.g. flow lines, weld lines)
• Enables advanced surface finishes and new design textures
• Potential material savings and optimized cycle times

Customized heating processes
A range of heating methods is available for DMH; cooling is typically achieved with water. Selection depends on part size, geometry and target temperatures.

Inductive systems

• Very fast heating
• Temperature capability up to 400°C
• Supports 3D contours and multiple cavities
• Single-sided or double-sided cavity heating
• Best for small to medium components
• Partner: Roctool with HDplastics

Electric heating systems

• Fast local heating
• Optimized for 2D contour geometries
• Local area heating for targeted zones
• Typically one-sided cavity heating
• Suitable for small components
• Offered by multiple manufacturers

Water / water solution

• Slow to moderate heating speed
• Temperature range up to 120°C
• Capable of 3D contour heating depending on design
• Usually single-sided cavity heating
• Suitable for small to medium components
• Available from various suppliers

Steam / water

• Moderate heating time
• Temperature capability up to 180°C
• 3D contours possible depending on tooling
• Usually single-sided cavity heating
• Suitable for medium to large components
• Available from various suppliers

Technical specifications

• Process name: Dynamic Mold Heating (DMH)
• Heating options: inductive (fast, up to 400°C), electric (fast, 2D), water (up to 120°C), steam/water (up to 180°C)
• Heating geometry: 2D and 3D contour capability depending on system
• Cavity heating: single-sided or double-sided depending on setup
• Component size: ranges from small to large depending on heating system selected
• Typical cooling medium: water
• Applications: high-quality surface finishes, improved part properties, reduction of injection-molding defects
• Integration: can be combined with temperature control on one or both mold halves