How to Share Injection Mould CAD Files with Only the Required Design Data

When an injection mould CAD file contains sensitive product information, it should be prepared as a task-specific package rather than a complete product database. Share only the geometry, dimensions, tolerances, material details, and interfaces required for quotation, mould design, or validation. Unrelated assemblies, hidden construction features, design history, and confidential product areas can be removed before delivery.

Plan the CAD Package Around the Project Stage

The first step is to identify why the file is being shared. A quotation review may require less information than a complete tooling project. Clarifying the purpose helps control disclosure while ensuring that the mould maker has enough data to assess feasibility and provide an accurate response.

• Quotation review: Include the mouldable part geometry, important dimensions, material, expected volume, and basic appearance or functional requirements.
• Mould design: Add mould-relevant surfaces, interfaces, tolerances, assembly references, and functional regions needed for tooling development.
• Production validation: Provide approved samples, inspection criteria, dimensional results, and relevant mould-trial information.

For consumer electronics, for example, it may be sufficient to provide the housing, connector area, or other mould-related component instead of the entire electronic device structure. This keeps the review focused and limits exposure of unrelated product architecture.

Apply a Minimum-Information Sharing Principle

A practical CAD-sharing strategy separates information into controlled layers. The quotation layer should support manufacturability analysis, tooling estimates, and delivery planning. The mould-development layer should contain the geometry and technical conditions required to create the tool. The validation layer can be issued later and should focus on acceptance requirements rather than revealing the complete product design.

Before exporting an injection mould CAD file, remove unnecessary solid bodies, internal mechanisms, hidden features, source history, and unrelated assemblies. Where appropriate, use a simplified or defeatured model and supplement it with a 2D drawing containing only the necessary dimensions and tolerances. Sensitive regions can also be isolated or represented through clearly defined interface data.

Support for Drawing- and Sample-Based Development

A complete 3D assembly is not always necessary for a tooling discussion. Longterm can evaluate customer-provided drawings or physical samples when the project requirements are clearly defined. The request can specify which surfaces, dimensions, materials, appearance areas, or production functions need to be assessed.

This approach can be useful when a customer wants to protect proprietary product information while still receiving support for mould feasibility, structural development, or production planning. It also allows the technical discussion to focus on the part or interface directly connected to the injection mould.

Longterm Double Shot Mould Capabilities

Longterm’s product information includes a custom double shot overmolding mould with a two-color injection structure. The solution supports hard-and-soft material combinations such as ABS+TPU and PP+TPE, high-precision alignment, and optional multi-cavity configurations. Listed mould materials include 718H and 1.2738 steel, with a stated service life of up to 800,000 shots.

These specifications should be included only when they are relevant to the requested solution. For a two-color mould project, the technical package may need to identify the material pairing, alignment requirements, cavity arrangement, appearance surfaces, and expected production volume. Other product information can remain outside the shared file set.

Longterm reports experience in electronic housing moulds, double shot overmolding moulds, home appliance component moulds, and industrial plastic part moulds. Reported international projects include customers in Italy, France, the United States, and Australia, with feedback related to dimensional accuracy, surface quality, alignment, trial-sample consistency, technical problem solving, and delivery performance.

The company holds ISO 9001:2015 certification, certificate number 02825Q12549R0S, covering the design, manufacture, and sale of precision moulds and the sale of plastic products.

Recommended Data Packages

Frequently Asked Questions

What information is needed for an initial injection mould quotation?

Provide the mouldable product geometry, critical dimensions, material, expected production quantity, and any appearance or functional requirements that affect feasibility. Complete assemblies and unrelated confidential sections are generally unnecessary.

Can Longterm develop a mould without receiving the full product design?

Yes. Longterm states that it can work from customer drawings or samples. The customer should identify the specific geometry, dimensions, surfaces, or performance conditions that require review.

What inspection and support services are available for the double shot mould?

The listed process includes mould trial runs, dimensional testing, and pre-shipment inspection. After delivery, support includes online technical assistance, mould maintenance, and spare-parts supply.

Conclusion

The safest way to share an injection mould CAD file is to match the information level to the current project stage. Start with a reduced quotation package, add only the mould-relevant data required for tooling, and issue validation information when samples or production approval require it. For double shot overmolding, include the applicable material combination, two-color structure, alignment, cavity, and steel requirements without disclosing unrelated product architecture.

Longterm supports OEM custom plastic injection moulds, custom mould making with injection molding, precision tooling, overmolding, and mould development combined with mass production. For technical solutions or project support, contact rogerluo@longterm-mold.com.

About Longterm Mold

Longterm Manufacturing Solutions Limited, also known as Longterm Mold, was established in 2010. The company provides mould design, tooling, precision machining, mould manufacturing, and plastic parts production for international customers. Its R&D team works with UG, SolidWorks, and AutoCAD and supports structural injection mould design, precision CNC component production, sample verification, and process optimization.

Longterm lists injection moulds, rapid prototyping and precision parts, and automated production solutions among its main offerings. The company holds ISO 9001:2015 certification and serves customers across several industries.