In cabin air handling modules where thin-wall louvre blades are gated through narrow edge restrictions, TERLURAN 967K is processed only after desiccant drying at 80 °C for 4 h to reduce residual moisture below 0.05 wt%, with dryer dew point held at or below −30 °C. The material is injected at melt temperatures between 230 °C and 250 °C, with mould temperature controlled at 45–65 °C; screw linear advancement speed during filling is commonly set from 150 mm/s to 250 mm/s on a 20:1 L/D general-purpose screw, while hydraulic holding pressure is staged from 60 MPa down to 30 MPa over a 2–3 s profile. Back pressure is maintained at 0.4–0.8 MPa and screw decompression is limited to 2–4 mm to prevent suck-back and surface streaks. In louvre packs with blade thickness below 1.2 mm, sequential valve gating is often required to balance filling of three to eight cavities; gate lands are kept below 0.8 mm thickness to avoid vestige interference during vane rotation. Terminal components include defroster grilles, centre stack trim surrounds, gear-shift bezels and HVAC air vane sets. Automotive Tier 1 specifications typically require volatile organic emission testing per VDA 278:2011 and fogging gravimetric condensate evaluation per DIN 75201-B:2011; published data for this specific grade configuration is limited, so plate-out and condensate mass must be re-qualified after colourant masterbatch addition. Weld-line strength in thin louvre pivots is confirmed using ISO 527-2:2012 tensile specimens cut from first and second cavity positions, while moulded-part annealing at 80 °C for 2 h is applied before dimensional audit to stabilise shrinkage anisotropy.

What Limits Direct Current Tracking Index on Unsealed ABS Housings?

Low-voltage switchgear front plates and DIN-rail enclosure bodies are moulded in neat TERLURAN 967K only when the final assembly does not expose live parts directly to the housing. The melt is prepared with a barrel profile of 210–240 °C and nozzle temperature not exceeding 250 °C; mould temperature at 50 °C provides a balance between weld-line visibility and dimensional repeatability in parts with wall sections from 1.0 mm to 2.5 mm. Brass inserts are positioned in blind bosses with a minimum boss wall thickness of 2.5 mm and pressed or ultrasonically inserted after moulding; pull-out resistance is tested by torque-to-failure according to internal tooling acceptance limits, with ISO 527-2:2012 tensile modulus used only as reference. Comparative tracking index must be evaluated on moulded plaques per IEC 60112:2020; published data for this specific ABS configuration is limited, and standard unfilled ABS without tracking-resistant additives should not be assumed to meet 600 V CTI without laboratory verification. Flame-retardance performance is constrained to UL 94 HB at 1.5 mm thickness; if a V-0 enclosure is required for proximity to uninsulated live parts, a modified flame-retardant grade with different flow length and processing behaviour must be substituted. Glow-wire testing per IEC 60695-2-11:2021 is carried out at 650 °C only when the end-use standard demands unattended-mode compliance; the result depends on wall thickness, colourant package and internal moulded stress. Terminal products include miniature circuit breaker front plates, relay socket bodies, terminal block covers and energy meter housings. Continuous service temperature is limited to 75 °C under no-load conditions; exposure above that threshold reduces tensile strength retention and accelerates surface discolouration.

Because electric kettle lower shells and food processor bowl covers are moulded with high-gloss exterior surfaces, TERLURAN 967K is processed with cavity steel polished to SPI A2 finish or better, and mould temperature is raised to 60–70 °C to replicate that gloss on walls of 2.0 mm nominal thickness. Melt temperature is held in a narrow band of 235–245 °C because residence times above 6 min at 250 °C can produce yellowness and surface gassing in white or pastel colour runs. A white masterbatch based on polycarbonate-free carrier is added at 2.0 wt%, and the screw is purged with an acrylic or PP cleaning compound between colour shifts to reduce streaking. Gate placement uses a fan gate or curved-edge film gate with land thickness not exceeding 1.0 mm; sink marks above bosses and ribs are controlled by reducing local rib thickness to 60 % of adjoining wall and by applying packing pressure of 55–70 MPa for 3–5 s. Venting channels around blind pockets are ground to 0.02 mm depth to prevent gas burns without producing flash. Assembled appliance housings must meet drop and mechanical strength requirements under IEC 60335-1:2020; for kitchen machines, IEC 60335-2-14:2019 subclauses on moving-part guards are relevant. The finished components include kettle bodies, blender collar rings, egg steamer base covers and food processor bowl lids. No direct food-contact approval is implied; if the moulded surface is to contact fatty or aqueous foods, migration testing under EU 10/2011 and organoleptic evaluation are mandatory on the final part because the material is not supplied with a blanket food-contact declaration.

Gloss Retention After 500 kJ/m² Xenon Arc Exposure on Consumer Electronics Bezels

Thin-wall monitor bezels with visible surface area above 0.1 m² are produced from TERLURAN 967K using hot-runner systems with valve gates spaced at intervals not exceeding 150 mm; this gate layout prevents hesitation marks in areas away from the sprue and reduces fill pressure on 1.2 mm walls. Clamp force is calculated on projected area using a specific force of 3.5–4.5 kN/cm², which is sufficient for two-plate moulds up to four cavities without flash at melt temperatures of 235–245 °C. Mould temperature is held at 60 °C on both core and cavity halves to control gloss and reduce post-mould dimensional movement. Gloss values measured at 60° geometry per ISO 2813:2014 are controlled at incoming inspection; statistical process control limits are usually set at ±3 GU around the agreed master plaque. However, colour and surface gloss after accelerated weathering are more restrictive: exposure in a xenon arc chamber per ISO 4892-2:2013, cycle 1, to 500 kJ/m² at 340 nm commonly produces visible ΔE changes in unpainted ABS; published data for this specific grade is limited, so indoor-only positioning must be stated on the design record. Terminal products include LED television bezels, Wi-Fi access point shells, set-top box covers and desktop switch front panels. Electrical safety is evaluated under IEC 62368-1:2023, with enclosure flammability limited to UL 94 HB unless an internal fire enclosure is already provided by metalwork. REACH SVHC screening under Regulation (EC) No 1907/2006 and RoHS substance limits under 2011/65/EU are supplied through the material compliance certificate; this does not replace end-article conformity under harmonised standards.

For wheeled vacuum cleaner lids and wand connector bodies made in multi-cavity tools, TERLURAN 967K is injected at melt temperatures between 230 °C and 250 °C with mould temperature at 40–60 °C to shorten cooling time; lower mould temperatures reduce cycle time but increase visible flow lines around snap-fit bosses. The components include cyclonic separator ducts, wheel brackets, wand adaptor clips and floor-head upper shells. Because these parts carry repeated snap-fit strain, boss designs use a release angle of 0.5–1.0° per side and a snap undercut not exceeding 0.6 mm in unreinforced ABS; published data for the specific grade under repeated flexural fatigue is limited, so production qualification includes 10,000-cycle snap engagement tests on a motorised fixture at 23 °C and 50 % RH. Hot-runner valve gating is used when the tool has eight or more cavities; melt pressure at the nozzle is kept below 90 MPa to prevent gate bloom around the valve pin. Flash is controlled by setting clamp force at 4.0–5.0 kN/cm² of projected area and by part extraction temperature below 75 °C. Dimensional capability is assessed with ISO 294-1:2017 rectangular plaques and compared with actual cavity-specific shrinkage from first article inspection. Mechanical safety is evaluated under IEC 60335-2-2:2019; floor-care enclosures must survive drop and impact tests without cracking live-terminal barriers. The material is acceptable only for indoor floor-care equipment because low-temperature impact falls with increasing wall-section constraint, and subzero garage storage is not an intended operating condition.

When Cavity Pressure Transducers Are Used to Set Holding Pressure in Thin-Wall Multi-Cavity Moulds

Office automation chassis and scanner lids are moulded in high-flow ABS when dimensional stability must be maintained at 50 °C continuous service with occasional excursions to 70 °C. Cavity pressure transducers are mounted near the last-filling point of each cavity, and the transfer from injection velocity control to holding pressure control is triggered at 80–95 % of final cavity filling, depending on gate freeze-off behaviour. The following table records a comparative processing window for three representative wall thicknesses used on the same printer body platform:

Using cavity pressure data, packing time is extended until gate sealing is observed by decay of the pressure curve; typical gate freeze time for a 1.5 mm wall with fan gate is 4–6 s. Terminal products include inkjet printer paper trays, scanner document lids, copier side covers and fax machine front panels. Flammability is limited to UL 94 HB; fire enclosure requirements under IEC 62368-1:2023 must be satisfied by the complete assembly rather than by the polymer alone. Electrical safety for moving mechanical parts is checked under the applicable subclauses of IEC 62368-1:2023, while melt mass-flow rate is verified at incoming inspection per ISO 1133-1:2022 at 220 °C with 10 kg load. Published data for the exact MVR of this lot is supply-chain controlled; a deviation outside the agreed control window is treated as a processing change because it shifts mould fill time and weld-line position.

Stationary point-of-sale terminal bases and barcode scanner cradles are produced in TERLURAN 967K with mould cavities textured to VDI 3400 No. 24–27 to mask minor abrasion. Chemical resistance is a primary design restriction: solvents such as toluene, MEK and ethyl acetate must not be used for cleaning, because they absorb into the surface and reduce stress-crack resistance in moulded-in bosses and snap features; alcohol-based cleaners may be tolerated on unstressed surfaces but are not an approval for long-term exposure. The moulding process uses a two-plate cold-runner tool with indirect pins and ejector sleeves because textured surfaces require higher demoulding force; mould release taper is increased to 1.0° on side walls, and ejection temperature is held below 70 °C. Melt temperature is maintained at 235–245 °C and the screw is pulled back after plastication by 3–5 mm decompression to prevent drool at open nozzles. Terminals include retail point-of-sale bases, barcode scanner stands, payment terminal bezels and queue-management display frames. Surface texture change after 500 cycles Taber abrasion with a CS-10 wheel is measured on texture plaques; published data for this specific grade configuration is limited, so a signed master plaque is retained as the visual reference. Electrical safety is evaluated under IEC 62368-1:2023, and ingress protection is not claimed under IEC 60529:2013 unless a gasketed sealing design is separately qualified.