plastic molding order process and timetable

China injection molding process:



  • Design of components (clients are welcome to supply 3D files)—-Client Side

Topworks can optimize your design for cost savings or ensure compatibility with Asian processes by optimizing your design before tooling.

  • Parts Prototyping (if necessary)– Client Side Or Topworks side

Topworks can utilize Computer Numerical Control (CNC) to produce a machined prototype or 3D printing that you can see and feel to validate the design of your part.

  • Tool Design— Client Side Or Topworks side

During this stage, your Tooling Information Worksheet is used to design the tool.

  • Tool Check and Mold Flow Analysis — Topworks side

The accuracy of the tool design is validated.

  • Tool Fabrication — Topworks side

The tool is precisely fabricated according to the validated design using Computer Numerical Control (CNC), and Electrical Discharge Machining (EDM) technologies)…

  • First Shots To Client(T1) — Topworks side

The first test shots will be sent via courier soon after the injection molds are made. Once sent, these usually arrive in 2-5 days.

  • Tool Modifications and Texturing — Topworks side

At this point, Topworks makes any changes to the tool that is necessary to bring it into compliance with the approved specifications. Topworks makes any changes that are necessary (specifically excluding design changes, which are always charged for) free of charge.

In this stage, the texturing process is done, which is usually the last step before mass production.

  • Mass Production Run or Export — Topworks side

In this stage, the tool is handed over to the customer or ready for export.




PC injection molding
PC injection molding

Tooling usually takes 5 to 6 weeks from receipt of deposit funds and assumes that the 3D files are correct.

It is possible to shorten the lead time if you have a special urgent request (additional fees apply).

“T1” samples are the first samples built based on your 3D files.

The test shot stage takes approximately one to two weeks to complete, depending on the original 3D design and the complexity of the plastic parts.

The lead time for production will vary depending on the complexity of the parts, the tooling, the materials, and the client’s desired quantity.

Please let us know if you have a deadline.

We will discuss what can be done in order to meet your deadline. In general, we would require about two weeks to complete orders of 10,000 units.

Please do not hesitate to contact us with questions regarding the exact duration of your project, as times (and project scopes) vary greatly.

The time required for delivery depends on the manner in which the shipment will be handled. Examples include DHL, UPS, FedEx, TNT, air or sea shipment.

If you have assigned a freight forwarder, we can utilize your existing freight forwarding agreement for a nominal fee.

If there is no specific forwarder, we may be able to suggest forwarders that we have previously worked with.

Generally, our experience indicates that depending on the final destination, the shipment takes two to five days via international courier, two to five days by air, and twenty to forty-five days by sea.

Delivery FOB China is the simplest method, but international courier services would not be recommended due to their complexities. EMS is an alternate option for small quantities, however, if the delivery is urgent.

Additionally, customs declaration timetables vary by country.

Please contact your local freight forwarder for further information.