Questions About Custom Components

Common custom mold components include:

• Sliders and Lifters:Enable lateral demolding or forming of complex features.
• Core and Cavity Inserts:Define the product shape and dimensions, serving as the mold’s core functional parts.
• Insert Components:For localized forming or quick replacement of specific mold regions.
• Ejector Pins & Sleeves:Ensure smooth ejection of molded parts.
• Cooling Components:Such as water nozzles and manifolds to ensure efficient mold cooling.
• Special surface or wear-resistant parts:High-hardness or coated parts depending on the plastic material.

Common materials include:

• Pre-hardened Steel(e.g., P20, 1.2738, 718H) – good machinability, suitable for medium-volume molds.
• Hardened Steel(e.g., H13, S136, 1.2344) – high hardness and wear resistance, ideal for high-precision, high-volume core components.
• Stainless Steel(e.g., 420, 1.2316) – corrosion-resistant, suitable for medical or transparent molds.
• Copper Alloy(e.g., BeCu) – excellent thermal conductivity for efficient cooling; Powder Metallurgy steel and Tungsten Carbide are used for high-wear parts such as sliders, inserts, or punches.

We have no MOQ request in order to support customers, even you just order one parts. This is advantage for you if you have new idea to market fast without being tied to a specific quantity.

When high precision is required, machining methods are chosen based on part geometry, material, tolerance, and surface finish. Precision CNC (3/4/5-axis) is suitable for complex structures, typically achieving ±0.01mm–±0.005mm; grinding and honing can reach ±0.001mm–±0.003mm; Wire EDM and EDM are ideal for hardened materials or complex internal contours, with accuracy around ±0.002mm–±0.01mm. For ultra-smooth surfaces or tight fits, secondary grinding or polishing can be applied. Heat treatment, batch size, and inspection methods should also be considered. We can recommend a tailored machining and inspection plan based on your drawings and key tolerances, balancing precision, cost, and efficiency.

Common surface treatments include polishing (improves surface finish, suitable for transparent or high-gloss molds), plating (chrome, nickel for wear and corrosion resistance), nitriding or ion implantation (increases hardness and wear resistance), PVD/TiN coating (reduces friction and extends mold life), blackening or oxidation (anti-rust), and sandblasting or etching (improves demolding or creates special textures). Surface finish ranges from mirror Ra0.2μm to functional roughness Ra1.6μm. We recommend the most suitable treatment based on material, usage, and customer requirements to ensure parts are both durable and visually appealing.

To ensure accurate design and machining, we usually require complete product data or drawings, including 3D models or 2D engineering drawings, key dimensions and tolerances, material type, surface treatment or finish requirements, and functional/environmental information. If the part requires assembly or fits with other components, please provide relevant information. This allows us to quickly evaluate feasibility, optimize the design, and ensure the final parts meet your production and usage requirements.

The sample/prototype process validates design and machining plans before mass production. We first produce samples based on drawings or 3D models, then inspect dimensions, fit, function, and surface quality. We discuss with the customer whether adjustments to design or process are needed. Once confirmed, the samples serve as references for mass production.

Lead time depends on part complexity, material selection, and batch size, typically ranging from a few days to several weeks.

For urgent orders, we offer expedited production via a dual-factory collaboration model: two factories can simultaneously process different parts or operations, significantly reducing lead time while maintaining quality standards. We also optimize machining sequences and increase equipment utilization to ensure on-time delivery with high precision and surface quality.

If a part has a quality issue during inspection or use, we immediately initiate a problem-solving process: identify the type and cause (machining, tolerance, material, or surface treatment), then provide corrective actions, including rework, remanufacture, or replacement. Root causes are analyzed and processes optimized to prevent recurrence.