Order process for custom molded parts
Payment Terms and Order Process for Injection Molding
Use this page to understand how an injection molding order usually moves from RFQ review to mold quotation, project confirmation, tooling, T1 samples, production approval, inspection, packing, payment confirmation, and shipment release. Final payment terms are quote-specific and should be confirmed before tooling starts.
Buyer clarity
Payment terms should follow the engineering and order stage
Injection molding is not only a unit price discussion. The order path includes part review, DFM questions, tooling decisions, T1 sample approval, production readiness, inspection scope, packing details, and shipment coordination. Clear commercial timing helps both sides know what is being paid for and what must be confirmed next.
Order timeline
Typical injection molding order process
The exact sequence depends on part complexity, material, mold plan, sample feedback, production quantity, inspection needs, and shipping arrangement. The steps below show the normal decision points buyers should expect.
RFQ and file review
Send 3D files, 2D drawings, material, quantity, color, tolerance, finish, target use, packing notes, and destination information if available.
DFM questions
Plastic Make Co reviews moldability, wall thickness, draft, ribs, bosses, parting line, gate location, tolerance, and open quote assumptions.
Quotation basis
The quotation should clarify tooling scope, sample expectations, production price, quote validity, inspection assumptions, packing, and shipment discussion points.
PI, PO, and confirmation
Before payment, buyers should confirm the accepted revision, project scope, commercial terms, payment method, invoice details, and the next engineering milestone.
Mold making and T1
After the agreed initial payment and technical confirmation, the mold project moves into tooling, first trial samples, sample review, and correction discussion.
Production and shipment
After sample approval and production confirmation, the order moves through molding, inspection, packing, final payment confirmation if applicable, and shipment release.
Commercial checkpoints
What buyers should confirm before payment
Good payment communication reduces the chance of paying against an outdated file, an unclear sample standard, or an incomplete shipment scope.
Confirm the current drawing, 3D file, part number, and revision before approving tooling or production.
Check what is included in mold cost, sample support, part price, secondary process, inspection, packing, and shipment discussion.
Confirm whether the payment relates to tooling, samples, production, balance payment, shipment release, or another project-specific milestone.
Verify company information, billing contact, currency, bank or payment details, and any internal purchasing requirements.
Define dimensions, appearance, color, fit, function, material, packing, and any buyer-side testing before mass production approval.
Confirm destination, forwarder contact, packing, labels, documents, photos, and any release steps required before shipment.
Milestone table
How order stages connect to payment discussion
The table below is a practical planning guide, not a fixed payment rule. The confirmed quotation and proforma invoice should define the actual terms for each project.
| Order stage | Buyer should confirm | Payment and process note |
|---|---|---|
| RFQ review | CAD files, drawings, material, quantity, finish, tolerance, application, and shipping information. | No serious quote should depend on guesswork if the missing information can be clarified early. |
| DFM and quotation | Tooling plan, production assumptions, sample scope, open risks, inspection needs, and quote validity. | Payment terms should be read together with the technical and commercial scope of the quotation. |
| PI or PO confirmation | Accepted scope, invoice details, payment method, currency, project contact, and file revision. | Before paying, make sure the invoice and the latest quotation are aligned. |
| Mold making | Mold start condition, target sample plan, drawing freeze status, and engineering questions. | Tooling should begin after the agreed commercial and technical conditions are clear. |
| T1 sample review | Dimensional report, photos, appearance, fit, function, color, surface, and buyer feedback. | Sample feedback should be specific enough to support mold correction or production approval. |
| Production approval | Approved sample, production quantity, packing, inspection scope, and delivery plan. | Mass production should follow an approved standard instead of an unfinished sample discussion. |
| Inspection and shipment | Pre-shipment checks, packing photos, carton details, forwarder, documents, and shipment release condition. | Final payment or release steps, when applicable, should be confirmed before shipment scheduling. |
Tooling stage
Mold quotation, deposit discussion, and T1 sample approval
Mold making usually requires tighter coordination than repeat production because early decisions can affect cost, lead time, sample quality, and later order stability. Buyers should connect payment approval with the tooling scope and sample review plan.
- Confirm whether the quote covers mold design, mold making, first trial samples, and expected sample review support.
- List critical dimensions and appearance areas before T1 so inspection is tied to real part risk.
- Confirm how sample feedback, mold correction, and revised samples will be communicated.
- Clarify whether material, insert, color, packing, or testing details are buyer-supplied or supplier-arranged.
- Keep purchase approval, technical approval, and file revision control connected in one communication thread.
Production order
Production, inspection, balance payment, and shipment release
After samples are approved, the order discussion shifts from tooling risk to production control, packing, documents, and shipment timing. The payment and release process should match the agreed project scope.
Production confirmation
Confirm quantity, material, color, inserts, secondary process, assembly, packing, labels, and delivery plan before production starts.
Inspection scope
Define what needs to be checked: critical dimensions, surface, color, fit, function, assembly, packing condition, and photo documentation.
Packing readiness
Confirm carton size, quantity per carton, protection method, label requirements, gross weight, net weight, and shipment marks if needed.
Shipment coordination
Provide destination, forwarder contact if any, shipping preference, document needs, and release instructions before the goods are ready.
Final payment check
If the project has a final payment or release step, match it to the invoice, inspection result, packing status, and shipment schedule.
Order records
Keep quotation, PI or PO, payment record, approved sample notes, inspection details, packing photos, and shipment documents organized.
Avoid confusion
Common payment and order process questions
Most order issues are caused by unclear scope, late design changes, missing approval standards, or shipment details that arrive after production is finished.
Can terms be the same for every order?
No. Terms should be confirmed by quotation because tooling, samples, production quantity, secondary process, packing, and shipment needs are different by project.
When should a buyer approve mold making?
Approve mold making after the file revision, quotation scope, commercial terms, material, and main technical assumptions are clear.
What if the drawing changes after payment?
Share the revised drawing immediately. The change may affect mold design, tooling work, sample timing, part price, or correction scope.
Can production start before sample approval?
For most custom molded parts, production should wait for buyer approval of sample, material, color, dimensions, appearance, and functional checks.
What should be checked before shipment?
Confirm inspection result, packing, labels, quantity, carton details, photos, destination, forwarder contact, documents, and payment or release condition.
How can buyers speed up review?
Send a complete RFQ with CAD files, drawings, material, quantity, tolerance, finish, sample expectations, packing, and shipment details.
Internal links
Useful pages before confirming an injection molding order
These pages help buyers prepare the technical and commercial information that usually affects quotation, sample approval, production, and shipment.
Ready to confirm scope?
Send drawings, order questions, and shipment details
Share CAD files, drawings, material, quantity, finish, tolerance, sample expectations, inspection needs, packing notes, destination, and any payment or purchasing requirements that should be reflected in the quotation.