Manufacturing Technologies
Moulding & Manufacturing Technologies
Vajra Process Landscape
Different component geometries, materials, volumes and performance requirements call for different manufacturing routes.
Vajra selects the manufacturing process around the component — not the component around the machine.
Manufacturing Processes
The right process for the right component.
Compression Moulding
A versatile process for engineered elastomer components.
A measured rubber preform is placed into a heated cavity and compressed while the compound cures. Compression moulding is particularly useful where component size, compound choice or geometry makes it the most practical route.
Best suited for
- Large rubber parts
- Specialty compounds
- Rubber-to-metal components
- Low-to-medium volumes
Key advantages
- Robust process
- Good material control
- Large cross-sections
- Development flexibility
Transfer Moulding
Controlled material flow for intricate geometries and inserts.
A measured rubber charge is transferred through controlled passages into closed cavities. This can provide enhanced control of filling and insert encapsulation compared with conventional compression.
Best suited for
- Intricate geometries
- Insert encapsulation
- Multi-cavity tooling
- Precision bonded components
Key advantages
- Controlled flow
- Good cavity filling
- Repeatable insert positioning
- Complex-feature capability
Injection Moulding
Automated material delivery for repeatable production.
Uncured rubber is metered and injected into a closed heated mould. The process is valuable when repeatability, cycle efficiency and production consistency are major requirements.
Best suited for
- Higher production volumes
- Precision seals
- Complex repeat parts
- Multi-cavity production
Key advantages
- High repeatability
- Controlled dosing
- Reduced operator dependence
- Efficient production
Rubber-to-Metal Bonding
Creating one integrated component from elastomer and engineered substrate.
Bonding is a controlled system involving surface preparation, primer/adhesive, compound, moulding and cure. These variables must work together to achieve reliable adhesion and load transfer.
Best suited for
- Flex seals
- Bushes / mounts
- Actuator components
- Vibration isolation
- Aerospace / defence
Key advantages
- Permanent bond
- Load transfer
- Reduced assembly
- Damping + structure
Insert Moulding
Integrating engineered inserts directly into the moulded component.
A pre-positioned insert is integrated into the elastomer during moulding. Accurate location, retention, surface preparation and material flow are central to component performance.
Best suited for
- Metal inserts
- Bushes
- Valve components
- Sealing assemblies
- Structural interfaces
Key advantages
- Reduced part count
- Integrated assembly
- Dimensional control
- Permanent encapsulation
Polyurethane Moulding
High-performance elastomers where wear, tear and load capacity are critical.
Polyurethane is selected where wear, tear, load and resilience requirements exceed what a conventional rubber system may economically provide. Hardness, hydrolysis resistance and wear mechanism are key selection factors.
Best suited for
- Wear components
- Rollers
- Scrapers
- Hydraulic parts
- Heavy-duty engineering
Key advantages
- Exceptional wear resistance
- High tear strength
- High load capacity
- Wide hardness range
Thermoset & Bakelite Moulding
Rigid, dimensionally stable components from thermosetting materials.
Thermosetting materials undergo an irreversible crosslinking reaction during moulding. The finished component cannot simply be remelted and reshaped like a conventional thermoplastic.
Best suited for
- Electrical insulation
- Industrial components
- Rigid mouldings
- Thermal environments
Key advantages
- Dimensional stability
- Electrical insulation
- Thermal resistance
- Low creep
Engineering Plastic Moulding
Precision processing of thermoplastic and engineering polymer systems.
Engineering plastics are selected around strength, stiffness, wear, chemical resistance, temperature and dimensional stability. Processing parameters are matched to the specific polymer grade and geometry.
Best suited for
- POM
- PP
- PA
- Engineering thermoplastics
Key advantages
- Precision mouldings
- Repeatability
- Fast cycles
- Complex geometry
- Reprocessable materials
Composite Processing
Lightweight material systems for demanding structural applications.
Composite performance depends on reinforcement architecture, matrix chemistry, fibre orientation, consolidation and cure. Manufacturing is therefore integral to final material performance.
Best suited for
- Aerospace
- Defence
- Lightweight structures
- Specialised industrial systems
Key advantages
- High specific strength
- Low mass
- Tailored stiffness
- Application-specific architecture
Material → Process → Performance
The right material. The right process. The right component.
Material
Polymer & compound selection
Process
Tooling & moulding technology
Performance
Validated finished component
Integrated Engineering Workflow
Application
Temperature, pressure, media, motion, life
Material Selection
Polymer, compound, reinforcement, hardness
Design
Geometry, tolerances, sealing / structural function
Tooling
Cavity, flow, shrinkage, inserts, demoulding
Process Selection
Compression, transfer, injection, specialised routes
Moulding
Precision manufacturing of the component
Inspection
Dimensions and material property verification
Validation
Dimensions, material properties, application testing
Manufacturing as an Engineering Capability
Material science. Tooling. Process engineering. Precision manufacturing.
Elastomers
NR, NBR, XNBR, HNBR, EPDM, FKM, FVMQ, Silicone and specialty compounds
Bonded Components
Rubber-to-metal, insert moulding, integrated assemblies
Engineering Polymers
PU, TPU, POM, PP, PA and other engineering polymers
The Vajra Difference
We do not simply mould a specified material. We engineer the complete route from application requirements to material selection, tooling, process, inspection and repeatable production.
Actual process availability, machine configuration, dimensional capability and qualification requirements should be confirmed against Vajra's current manufacturing specifications.
Full Manufacturing Guide
View the original guide for the detailed process sequences and full technical reference.