How Should Payments Be Structured for Double Shot Molding Tooling?

For double shot molding tooling, a practical payment structure is 50% at order placement, 30% after T1 samples are completed, and the final 20% before shipment. This milestone-based plan connects each payment to a clear stage of tool development, sample evaluation, and delivery approval. When ordering a custom double shot overmolding mold, the buyer should also confirm the 25–40-day lead time, trial procedures, dimensional inspection, and pre-shipment quality checks.

Recommended Payment Structure

• Pay 50% when the tooling order is officially confirmed so design and mold production can begin.
• Release 30% once T1 samples are available for review and evaluation.
• Pay the remaining 20% before shipment after the mold trial, dimensional inspection, and final pre-shipment review are completed.
• For consumer electronics applications, verify mold alignment, material compatibility, surface quality, and sample approval before settling the balance.

Why Milestone-Based Payments Matter

A double shot mold requires more than a standard single-material injection tool. It must coordinate two injection stages, maintain accurate alignment, and often accommodate combinations such as ABS with TPU or PP with TPE. Because of this added complexity, payments are best linked to measurable technical milestones instead of being based only on calendar dates.

The first 50% installment authorizes the supplier to begin the custom tooling project, including mold design, material preparation, machining, and assembly. The second 30% installment becomes due after the first trial, when T1 samples can be inspected. This gives the buyer an opportunity to review dimensions, appearance, fit, alignment, and molding performance before the final payment is made.

The last 20% should be released only after the mold has completed its trial run and passed the agreed inspection requirements. The technical agreement should clearly identify the mold steel, cavity arrangement, expected service life, sample standards, and delivery conditions. The listed specifications include 718H / 1.2738 mold steel, optional multi-cavity construction, and a service life of up to 800,000 shots.

Supplier Capability and Project Experience

Longterm has produced double shot overmolding tools for consumer electronics applications. In one project from France, the supplier delivered eight sets of molds for a consumer electronics shell, with reported results including reliable alignment and stable trial samples. A separate project in Italy involved three electronic housing molds. The customer feedback highlighted accurate dimensions, smooth surfaces, effective communication, and delivery on schedule.

Longterm Manufacturing Solutions Limited holds ISO 9001:2015 certification covering the design, manufacturing, and sales of precision molds, as well as the sales of plastic products. Available after-sales services for this type of tooling include online technical assistance, mold maintenance, and spare parts support.

Payment Milestones and Verification Requirements

Frequently Asked Questions

When is the second installment due?

The second payment is scheduled after T1 samples have been produced. This 30% installment allows the buyer to assess the initial molded parts and confirm whether the tooling meets the approved requirements.

What should be completed before paying the final 20%?

Before releasing the balance, review the mold trial results, dimensional inspection records, and pre-shipment inspection. For double shot tooling, also confirm part alignment, material bonding or compatibility, surface finish, and compliance with the approved sample.

Can the schedule change for a more complicated mold?

The product information indicates a 25–40-day delivery period, while the wider service description gives 35–45 working days for complex precision molds. Any difference caused by cavity count, structure, materials, or design revisions should be recorded in the purchase order or technical agreement. Unless otherwise negotiated, the stated payment structure remains 50% at order, 30% after T1 samples, and 20% before shipment.

Conclusion

A 50% initial deposit, 30% payment after T1 sampling, and 20% balance before shipment provides a transparent way to finance double shot molding tooling. To protect both parties, the agreement should define the mold specifications, steel grade, cavity configuration, trial requirements, inspection standards, lead time, sample approval process, and after-sales support. Longterm provides OEM custom plastic injection molds, custom mold making with injection molding, high-precision double shot and overmolding solutions, and mold development combined with mass production. For technical inquiries, contact rogerluo@longterm-mold.com.

About Longterm Manufacturing Solutions Limited

Longterm Manufacturing Solutions Limited was established in 2010 and provides mold design, tooling, precision machining, mold manufacturing, and plastic parts production for customers in North America, Europe, Australia, and other global markets. With a team of 50 employees, the company supports small- and medium-batch orders for injection molds and precision CNC-machined components. Longterm is ISO 9001:2015 certified and has experience serving customers across several industries.