2K & Multi-Shot Molding
We transform complex multi-part assemblies into monolithic, high-performance components. By injecting multiple resins into a single tool, we deliver superior bonding strength and aesthetic precision that traditional assembly methods cannot replicate.
[ Rotary & Indexing Tooling ] [ 2K/3K Simultaneous Injection ]
[ Automated 6-Axis Extraction ]
Why Partner with REBAN?
The Strategic Advantage of Integrated Architectures
Assembly Elimination: We convert multi-part bills of materials (BOM) into single, monolithic 2K components. This eliminates labor costs, adhesive failure risks, and tolerance stack-ups inherent in manual post-molding assembly.
Enhanced Part Integrity: Achieve “soft-touch” tactile surfaces, integrated gaskets, and multi-color branding without the need for glue or fasteners, ensuring a permanent bond that survives extreme environments.
Supply Chain Velocity: Our unified approach to 2K design and manufacturing cuts total time-to-market by 35%, maintaining a single point of accountability for the most complex part geometries.
2K / Multi-Shot Technical Specification Matrix
This matrix defines the rigorous engineering standards applied to REBAN’s multi-material production lines. By synchronizing high-precision tooling with advanced injection logic, we ensure every bi-material interface meets aerospace and medical-grade bonding requirements.
| Engineering Parameter | REBAN Multi-Shot Execution Standard |
|---|---|
| Injection Architecture | Independent Twin-Barrel Systems (V/H/L configurations) for simultaneous resin processing. |
| Tooling Kinematics | High-speed Rotary Tables (180°/120°), Core-Back (Shifting), and Indexing Plate systems. |
| Clamping & Tonnage | 50T to 800T high-precision servo-electric and hybrid presses optimized for 2K/3K cycles. |
| Material Synergy | Rigid Substrates (PEEK, PA+GF, PC, PBT) + Overmolded Elastomers (LSR, TPU, TPE, TPV). |
| Shut-off Precision | ±0.005mm steel-to-steel shut-off fidelity to eliminate flash at complex material transitions. |
| Bonding Protocols | Molecular Chemical Adhesion + Engineered Mechanical Interlocks (Undercuts/Thru-holes). |
| Dimensional Fidelity | Strict shrinkage compensation for dual-material interfaces to ensure zero warpage. |
| Cycle Optimization | Parallelized injection sequences reducing total production time by 30–45% vs. traditional overmolding. |
| Quality Validation | 90° Peel Testing, Vacuum/Hydrostatic Leak Testing for IP68 seals, and Cross-Sectional Analysis. |
2K / Multi-Shot Material Selection
We offer an expansive library of over 150 thermoplastic and elastomer pairings specifically optimized for co-injection. Our material engineers provide a proprietary Bonding Compatibility Matrix to ensure high-strength chemical adhesion between rigid substrates and soft-touch overmolds.
ABS (Acrylonitrile Butadiene Styrene)
ABS/PC Blends (High Impact)
PA66 / PA6 (Nylon, including Glass Filled)
PBT (Polybutylene Terephthalate)
PC (Polycarbonate, Optical & Structural)
PEEK (Polyether Ether Ketone)
PEI / Ultem (Polyetherimide)
POM (Acetal / Delrin)
PPA (Polyphthalamide)
PPS (Polyphenylene Sulfide)
PSU (Polysulfone)
TPE (Thermoplastic Elastomer)
TPU (Thermoplastic Polyurethane)
TPV / Santoprene (Vulcanized Elastomer)
LSR (Liquid Silicone Rubber)
Multi-Material Surface Finish Options
Surface finish requirements for 2K molding are critical at the material interface to ensure seal integrity and aesthetic transitions. We support specialized textures for both the rigid substrate and the overmolded elastomer.
| Finish Code | Technical Description & Application |
|---|---|
| RB-2K-G1 | Industrial Matte: EDM finish (VDI 24-30), ideal for internal structural substrates. |
| SPI-A2 | High-Gloss Mirror: Grade #2 Diamond Buff, 1-2 Ra. For transparent light pipes or lenses. |
| SPI-B1 | Semi-Gloss: 600 Grit Paper, 2-3 Ra. Standard for aesthetic consumer housings. |
| MT-11000 | Mold-Tech Texture: Fine grain for “soft-touch” TPE/TPU ergonomic grips. |
| VDI-3400 | Standard Spark Eroded: Controlled roughness to enhance mechanical bonding at the interface. |
| RB-Satin | Light Bead Blast: Satin finish to hide fingerprints on high-use 2K interfaces. |
Technical Note: Minimum draft angles of 3° to 5° are recommended for textured surfaces to ensure clean part ejection and prevent scuffing on the overmolded elastomer.
HOW TO WORK WITH US
Upload a CAD File
To start, simply select a manufacturing process and upload a 3D CAD file.
Get Quote with DFM
Within a few hours we'll send you design for manufacturability (DFM) analysis and real-time pricing.
Manufacturing Begins
Once you review your quote and place your order, we'll start the manufacturing process. We also offer finishing options.
Parts are Shipped!
Our digital manufacturing process allows us to produce parts in as fast as 1 day.