VisiJet RWT-ENT-D60 is designated as a multi-material composite generated by MultiJet Printing from the VisiJet CR-WT 200 rigid phase and VisiJet CE-NT elastomer phase. The D60 designation corresponds to a target hardness of 60 Shore A, and the fixed-ratio digital composite is jetted as an integrated material rather than a user-blended system. Qualification data should therefore be collected on printed coupons from the same build orientation and build location as the intended part, because the blend ratio depends on print-head jetting stability and is not operator-adjustable at the point of use.

Overmolded hand tool handle prototypes are produced by assigning the CR-WT 200-rich structural shell and the RWT-ENT-D60 grip overlay within a single MJP build, eliminating the need for secondary injection molding tools. The MJP platform deposits material at a native resolution of 600 x 600 dpi with a layer thickness commonly set at 32 µm. Parts with a long handle axis are typically oriented between 10° and 20° from vertical to prevent visible layer striation on high-contact palm regions while keeping support drainage paths open through trigger guard voids. The wax-based support material is removed in a heated oven at supplier-recommended conditions, generally in the range of 60 °C to 65 °C for CE-NT-containing builds. Observed failure mode on production-scale MJP platforms is differential shrinkage between the rigid CR-WT 200 shell and the D60 pad when wall thickness ratios exceed approximately 3:1; the elastomeric phase retains residual stress during support removal and can curl thin overmold edges inward if the handle is soaked too long or if venting is insufficient. Compliance for internal prototype use typically follows the machinery end-user’s own occupational safety review, while resin and finished-part documentation should be screened against the REACH Candidate List SVHC and local waste disposal requirements. Finished prototypes include torque screwdriver grip shells, angle grinder rear-handle overlays, and pneumatic scaler control grips used for pre-production ergonomic evaluation.

Where the Shore A 60 Limit Changes Static Seal Groove Calculations

RWT-ENT-D60 is applied in pneumatic manifold prototypes where a rigid mounting flange and an integrated sealing bead are required in a single printed body. The rigid CR-WT 200 phase maintains bolt compression, while the CE-NT-containing D60 phase provides the conformability required for low-pressure static face sealing. The Shore A 60 target is lower than a commercial nitrile or EPDM gasket, so gland fill and squeeze ratios must be adjusted accordingly. For static face seals, groove fill should be held below 85%, with compression typically limited to 15% to 20% per standard elastomer seal design guidance. Because published compression-set data for this specific configuration is limited, every seal prototype should be aged in compression at 70 °C for 22 h according to ASTM D395 Method B or ISO 815-1 before fixture-level leak testing. The anisotropic layer boundaries in printed elastomers require tensile and tear test coupons to be harvested in both the build plane and the vertical build direction, because the Z-axis elongation is typically lower and cannot be assumed equivalent to X-Y behavior.

Process conflict arises in manifold prototypes containing blind sealing ribs and closed bolt holes. If wax support cannot drain through a low-point vent, oven removal leaves residual support inside the elastomeric rib, and the subsequent thermal expansion splits the rib wall. Bolted flange trials on manual assembly cells have shown more consistent sealing when the D60 bead is interrupted at split lines to create drain exits rather than run continuously through a closed loop. Terminal parts for this segment include vacuum fixture face seals, pneumatic distribution block prototypes, and low-pressure gripper air channel covers. Published data for chemical resistance of RWT-ENT-D60 to compressor oil mist is limited, so the application should be confined to dry or filtered air until fluid compatibility is confirmed by immersion testing.

For transcatheter and central venous access trainers, RWT-ENT-D60 is assigned to soft tissue analogues while the CR-WT 200-dominated regions replicate rib, clavicle, and cartilage-like rigid anatomy. The D60 material provides tissue-like puncture resistance without collapsing hollow vascular channels under repeated needlesticks. DICOM segmentation workflows are used to define the tissue boundary, followed by shell-mesh conversion and internal vessel channel generation. Compliance for this downstream use is limited to non-invasive training devices; published data for ISO 10993-5 cytotoxicity and ISO 10993-10 irritation for the RWT-ENT-D60 composite itself is limited, so finished-part biological evaluation should be performed before repeated skin contact. Long-term mucosal contact or implantation is outside the material’s demonstrated boundary. The build orientation places vascular channels as close to vertical as the part height allows, typically within 15°, to reduce stair-step roughness in small-diameter lumens. Support material must be thoroughly evacuated from vessel channels greater than 3 mm internal diameter; smaller elongated lumens are at risk of retaining wax that cannot be removed by the standard oven cycle alone. Ultrasonic cleaning should be limited to supplier-validated temperatures because thin CE-NT tissue flaps may distort if the bath exceeds 50 °C. Finished products include peripheral venous access trainers, intraosseous insertion phantoms, and chest tube insertion task trainers used in clinical simulation centers.

Gripper Contact Pads for Automated Part Handling

RWT-ENT-D60 is used as a conformal contact pad on rigid gripper fingers in automated assembly cells. The Shore A 60 hardness is firm enough to resist lateral folding under part gravity, while the CE-NT elastomer component reduces indentation and surface marking on textured injection-molded housings. The static coefficient of friction against ABS and polycarbonate is a critical retention parameter. Friction should be measured on as-printed surfaces using ASTM D1894; published data for RWT-ENT-D60 against specific production substrates is limited, and values cannot be transferred from generic elastomer datasheets. The grip force requirement is calculated from the Coulomb friction model, where the holding force is the product of the coefficient of friction, the number of contact points, and the applied pneumatic clamping force. In practice, D60 pads should be designed with a thickness of 2.5 mm to 3.5 mm and a shore contact width sufficient to avoid compressive shear at the pad-to-jaw interface. Cyclic pick-and-place trials on MJP gripper pads should include a run-in of at least 5,000 cycles to detect early delamination between the rigid jaw body and the printed D60 pad. The printer’s in-process UV exposure forms a chemical interface at the voxel boundary, but tensile peel durability is lower than a mechanically interlocked or adhesive-bonded overmold. Machine safety compliance is at the system level under ISO/TS 15066 where collaborative robots are used; the printed pad itself is not a safeguard component. Terminal products include end-effector pads for PCB edge handling, polished lens tray pick-up, and painted trim transfer in automotive assembly pilot lines.

When Support Drainage Defines Minimum Slot Width in Keypad Prototypes

Integrated membrane keypads are printed as a single MJP part with rigid keycap nuclei and D60 return-spring membranes connecting the keycap to the surrounding bezel. The elastomer phase provides the tactile return force after the keycap is depressed, but its performance depends on uniform slot drainage during support removal. Slot widths below 0.8 mm tend to retain wax support material because the melt path is too narrow for complete drainage during the oven cycle. The result is a partially blocked return-spring groove, which produces non-uniform key snap and early cracking along the groove wall. In prototype builds, the slot width is therefore held at or above 0.8 mm, and a split line is incorporated at the low point of each key pocket to act as a wax exit. Force-displacement response of the printed keypad should be measured with a calibrated linear actuator at 0.5 mm/s to 2 mm/s actuation speed and compared against molded production intent. The D60 phase demonstrates lower strain-rate sensitivity than common silicone rubber, but published data for this specific composite under repeated key actuation is limited. Compliance for consumer electronics prototype enclosures requires documentation against EU 2011/65/EU RoHS restricted substances and REACH SVHC due to EU market entry constraints. Terminal products include remote control key assemblies, automotive HVAC control faceplates, and medical device user interface covers produced as design validation models.

Printed automotive quick-connector housings for dry-fit package validation use RWT-ENT-D60 only for static assembly trials, not for pressurized fluid exposure. The printed D60 material is used in lock-tab and release-button prototypes to evaluate hand access, glove clearance, and clip deflection during connection and disconnection of rigid mating ports. Functional testing should be limited to air pressure below 200 kPa unless material-specific chemical compatibility is demonstrated. Published data for resistance of the CE-NT-containing composite to engine coolants, transmission fluids, and hydrocarbon-based test fluids is limited, so continuous fluid contact must be considered outside the validated window. The wax support removal step governs the design of narrow release-button channels, which should not be designed under 1.0 mm clearance without an additional drainage slot. Surface smoothness after support removal is acceptable for tactile evaluation but not for final surface quality standards without secondary finishing. Terminal products include quick-connector lock tab mockups, wire harness routing bracket fit models, and coolant reservoir neck assembly trials. Documentation for the resin constituents should be screened against REACH and the EU End-of-Life Vehicle Directive relevant to the intended vehicle development region.

Printing of diagnostic prosthetic socket liners with RWT-ENT-D60 allows simultaneous production of a rigid outer shell form and compliant pressure-relief zones over bony prominences. The CR-WT 200-dominated outer shell provides the structural shape of the diagnostic socket, while the D60 composite is assigned to relief pads where localized compliance reduces skin pressure during static standing trials. The printed socket is not intended as a primary load-bearing device; structural validation of final load-bearing prostheses is outside the scope of this material and falls under ISO 10328 for lower limb prostheses. If the diagnostic socket will contact skin repeatedly, the finished part should be evaluated under ISO 10993-5 and ISO 10993-10 because published data for this specific composite is limited for prolonged skin contact. Process planning for deep socket geometries requires auxiliary drain passages because wax support does not reliably evacuate from sockets deeper than 200 mm through a single distal opening. The socket is built with the proximal brim oriented upward and the distal end tilted to create a continuous drainage slope. Internal pad thickness is typically 1.2 mm to 2.0 mm over bony landmarks, and the interface between the D60 pad and the CR-WT 200 shell should feather over at least 5 mm to avoid a hard edge at the pad boundary. Terminal products include diagnostic check sockets, donning evaluation models, and orthotic insole relief pad prototypes used during pre-production clinical simulation.