Insert Mold & Over Mold

what is Insert Mold & Over Mold

Insert mold and over mold are two different branches of injection mold, but they have one thing in common these two types of molds need to bond two materials tightly by injection molding. Shanghai Future Mould, a professional injection mold supplier, has rich experience in insert mold and over mold manufacturing and can deal with different inserts and soft materials for coating in production.

Our strength: 

1. Metal inserts sourcing

For the customers who are not available in metal inserts supplying,
we can manufacture the metal inserts according to their drawings to save customers time on finding suppliers of qualified inserts. And we have good CNC machining partners who can manufacture metal inserts at good quality and lower prices.

2. Coating material suggestions

The main coating materials for over mold products are
TPU and TPE in different hardness, the material and the hardness used in over mold products vary in chemical, electrical, mechanical, and we can provide our suggestions of the coating material used for your project depends on the application.

Our Advantages of Insert Mold & Over Mold 

1. One-stop Multi-material Molding Solution with In-house CNC Machining We support custom metal inserts manufactured by our own precision CNC workshop. Customers do not need to source metal components separately. We integrate insert machining, mold design, injection molding and surface finishing into one workflow. The close coordination between CNC and injection molding avoids tolerance mismatch and assembly issues, shortening lead time greatly.

2. Professional Control of Dissimilar Material Bonding We are experienced in the technical challenges of insert molding and overholding. Optimized processes are adopted to prevent common defects such as delamination, peeling, air bubbles and cracks between metal-plastic or hard-soft plastic combinations. Free DFM analysis is provided at the early design stage to improve structure and bonding interface, eliminating manufacturability risks in advance.

3. Customized Material Selection for Diverse Application Requirements We recommend suitable materials according to product working conditions, including PC, ABS, PA, POM hard plastics, plus a wide range of TPE & TPU soft materials with different hardness. We also offer surface treatment suggestions for metal inserts to achieve reliable bonding performance, balancing mechanical strength, appearance and ergonomics.

4. Flexible Order Volume: Prototyping, Small Batch & Mass ProductionWe support prototype sampling, pilot run and large-volume mass production. Rapid tooling accelerates sample delivery. Standardized production ensures consistent quality. We can supply full material certificates, RoHS & REACH compliance documents to meet requirements of consumer electronics, automation equipment, medical instruments and other industries.

5. Targeted Technical Solutions for Two Molding Processes✅ Insert Mold: Metal inserts are encapsulated in plastic to strengthen structural rigidity. It eliminates separate assembly work and reduces labor cost, ideal for connectors, automation precision parts and electronic components.✅ Over Mold: Hard & soft material integrated molding to realize anti-slip, shock absorption, sealing and comfortable grip, widely applied in handheld devices, control handles and panels.

6. Closed-loop Quality Assurance System Full quality inspection flow (IQC-IPQC-FAI-FQC-OQC) is implemented. CMM coordinate measuring machine is available for critical dimension verification. We can provide FAI, dimensional inspection reports upon request. All production and inspection records are archived for full traceability to satisfy international quality audits.

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