DEKUMA LSR SERIES
LIQUID SILICONE RUBBER (LSR) INJECTION MOLDING MACHINES
Dekuma Liquid Silicone Rubber (LSR) injection molding machines deliver advanced technological solutions for manufacturing processes that require high precision, strict hygiene standards, and repeatable part quality. The LSR series enables the controlled and stable processing of liquid silicone rubber in automotive, medical, electrical-electronic, home appliance, and general industrial applications.
Dekuma's LSR machines form an ideal platform for high-volume, low-tolerance production thanks to their specially designed two-component dosing systems, precise injection control, high-rigidity press structure, and automation-ready open architecture.
LSR INJECTION TECHNOLOGY AND OPERATING PRINCIPLE
In the Liquid Silicone Rubber injection process, the silicone material is fed into the system as two separate components, A and B. These components are homogeneously mixed in precisely defined ratios within a high-accuracy dosing and mixing unit. The mixture is kept in a low-temperature, flowable state and transferred to the injection unit, where it is injected into the mold cavity.
The main steps of the LSR injection process are:
• Precise dosing of A and B components
• Homogeneous mixing
• Stable flow at low temperature
• High-precision injection
• Rapid vulcanization inside a heated mold
• Automatic part demolding
Thanks to this process, the silicone material cures quickly inside the mold, resulting in excellent surface quality and dimensional stability.
STRUCTURAL DESIGN OF DEKUMA LSR MACHINES
Dekuma LSR injection molding machines are specially engineered to meet the sensitive processing requirements of liquid silicone rubber.
Key structural features include:
• High-rigidity press frame designed to minimize vibration
• Vertical or horizontal configuration options
• Injection unit designed for low shear stress
• Special LSR screw and barrel geometry
• Precise clamping and platen parallelism control
• Open architecture suitable for automation and robot integration
This design significantly improves part consistency, especially in multi-cavity molds and complex geometries.
TECHNICAL AND NUMERICAL SPECIFICATIONS
Typical technical parameters of Dekuma LSR injection molding machines fall within the following ranges:
Clamping Force
• 100 tons - 500 tons
Injection Unit
• Injection volume: 10 - 500 cm³
• Injection pressure: 800 - 2000 bar
• Injection speed: multi-stage, finely adjustable
Screw Diameter
• 12 mm - 45 mm (special LSR design)
Plasticizing System
• Cooled screw and barrel
• Low-temperature control for stable material flow
Mold Heating
• Mold temperature: 150 - 200 °C
• Multi-zone, PID-controlled mold heating
Cycle Time
• 10 - 60 seconds, depending on part geometry
These values can be configured according to the specific silicone product being manufactured.
PRECISION DOSING AND MIXING SYSTEMS
Dekuma LSR machines operate in full integration with high-precision LSR dosing units.
Key advantages of these systems include:
• Consistent and repeatable mixing ratios
• Minimization of material waste
• Automatic color and additive dosing
• High process stability during continuous production
The dosing unit operates synchronously with the machine control system, enabling fully automated production.
AUTOMATION AND INDUSTRY 4.0 COMPATIBILITY
Dekuma LSR injection molding machines are fully compatible with automation and digital manufacturing infrastructures.
Supported integrations include:
• Robotic part removal and placement
• Automatic insert feeding systems
• Vision inspection and quality control
• Production data collection and reporting
• Remote monitoring and process analysis
These features provide critical advantages in traceability and quality consistency, particularly for medical and automotive applications.
APPLICATION AREAS
Dekuma LSR injection molding machines are widely used in the following industries:
• Automotive silicone seals and gaskets
• Medical silicone components
• Electrical and electronic insulation parts
• Home appliance silicone components
• Food-grade and hygiene-related applications
• Industrial silicone products
LSR technology offers high elasticity, long service life, and excellent chemical resistance in these applications.
ADVANTAGES OF THE DEKUMA LSR SERIES
• High-precision injection control
• Stable and repeatable part quality
• Short cycle times
• Low scrap rates
• Full compatibility with automation
• Design suitable for hygienic production
• Long machine service life and global support infrastructure
