Sprue Bushings Bolt Fixing Flange Thickness 10 mm with Special Bolt

Sprue bushings with bolt fixing are used to lock the sprue/nozzle interface inside injection mold tooling so that sprue alignment remains stable across repeated cycles. The 10 mm flange thickness flange-mount design is well suited for mold bases where a rigid, repeatable bolted location is required for consistent centering and mating.

• For automotive connector and housing molds, the secure bolt fastening helps maintain nozzle-to-sprue positioning under higher injection pressures, reducing risks of flash at the interface.
• For industrial appliance parts, selecting straight or tapered tip matching and the appropriate nozzle touch part specification (normal / resin pocket / string eliminator) supports stable flow control and reduces stringing.
• For precision thin-wall products, using the correct sprue diameter and taper angles (A and G ranges) supports controlled sprue formation, improving part-to-part reproducibility.

This variant’s flange-mount geometry and special bolt mounting provide reliable installation on standard mold bases, helping maintain repeatable alignment during molding loads.

The bushing is available in SKD61 or HPM1-equivalentAISI H13, offering a balance of hot-work performance, toughness, and wear resistance for molding components exposed to heat and cycle stress.

• Wear resistance vs. toughness: These steels generally provide strong resistance to abrasive wear at the nozzle contact zone, while still maintaining useful impact toughness for everyday injection molding service.
• Typical heat treatment: For SKD61-type grades, components are typically quenched and tempered after machining to reach a working hardness suitable for repeated thermal cycling. (Hardness in HRC depends on the supplier’s final temper condition; confirm the delivered hardness for your project requirements.)
• Manufacturing process: Machining to achieve the specified taper and pocket geometry is followed by heat treatment to stabilize dimensions and improve service life.

If you require higher abrasion tolerance at the tip, SKD61/HPM1-equivalent is commonly selected; if your application emphasizes dimensional stability and general toughness, the tempered condition remains the key lever.

Select the sprue bushing size by matching the shaft diameter (D), the bearing bore length (L), and the nozzle-to-sprue geometry requirements for your mold design.

• Choose D (shaft diameter): Available options are 10, 13, 16, 20, 25 mm. Use the D that matches the diameter of the receiving cavity/core bore and the mold base’s mounting interface.
• Choose L (bearing bore length): Select from the provided ranges, such as 0–120, 0–150, 0–200, or 0–100 mm, to achieve proper engagement depth without bottoming.
• Match sprue and tip geometry: Set P (sprue diameter) within 2–8 mm (or 2.5–8 mm depending on the variant), then select Tip matching shape (straight or tapered) and V (tip diameter) in the available ranges (4–9.9, 4–12.9, 4–15.9, 4–19.9, 4–24.9 mm).
• Taper and pocket control: Confirm A (0.5–4°), G (1–10°), and F (resin pocket depth, 0.3–2 mm) against your nozzle touch part type (normal / resin pocket / string eliminator).

When integrating into injection mold tooling, ensure clearance for thermal expansion and verify that the installed flange-mount face seats properly. Dimensional tolerances are not provided here; validate fit against your mold base tolerances and inspection drawings.