How to Select a Plastic Mold for Your Resin and Production Needs

Selecting a plastic injection mold starts with the material your part will use and the quantity you expect to produce. For Longterm's electronic-housing mold, the listed options include ABS, PC, and PP resins, single- or multi-cavity layouts, a precision tolerance of ±0.02 mm, and a stated service life of 50,000 to 800,000 shots. Treat these figures as starting points and confirm the specifications against your part and production plan.

Key Factors to Check Before Ordering

• Confirm resin compatibility: ABS, PC, and PP are the materials listed for this product.
• Discuss single- versus multi-cavity tooling in light of your target output. No cavity count is tied to a specific production volume in the available product information.
• Compare the ±0.02 mm tolerance and available polished, textured, or matte finishes with your part's requirements.
• Clarify which mold-life specification within the stated 50,000–800,000-shot range applies to your project.

How to Evaluate the Specifications

Begin with the production resin

The listed compatible resins are ABS, PC, and PP. Identify the resin before confirming the mold design. P20, 718H, and 1.2738 are listed as mold-material options, but the product information does not specify which mold material corresponds to each resin. Ask the supplier to recommend an option based on your material and project conditions.

Match tooling capacity to expected volume

The mold can be configured with one or multiple cavities, and its stated service-life range is 50,000 to 800,000 shots. Neither figure alone guarantees a particular production rate or lifetime for your application. Provide the planned order quantity and expected usage so the supplier can assess cavity layout and durability requirements together.

Specify dimensions and appearance

A tolerance of ±0.02 mm is listed, with polishing, texture, and matte finishes available. Document critical dimensions and the desired surface appearance before design approval. Longterm lists mold trial testing, dimensional inspection, and a final full check before shipment as quality checks; request trial samples and inspection results for review.

Supplier Experience and Project Fit

Longterm describes work on an electronic-housing mold for a handheld device and a double-shot overmolding project for a consumer electronics shell. Feedback for the first project noted accurate dimensions and smooth surfaces; the second was reported to have good alignment and stable trial samples. These examples may help assess relevant experience, but project requirements should be evaluated individually.

The company's R&D team includes five engineers focused on molds and precision machining, with experience in injection-mold structural design, sample verification, and process optimization. Longterm reports monthly capacity of 15–20 injection molds and tens of thousands of precision CNC-machined parts. Its ISO 9001:2015 certification covers the design, manufacture, and sale of precision molds, as well as the sale of plastic products.

Specification Checklist

Frequently Asked Questions

Recommendations

Before placing an order, align the resin, cavity arrangement, dimensional tolerance, surface finish, and required shot volume with the intended part and production schedule. The listed minimum order is one set, with delivery estimated at 20–35 days. Longterm also lists custom mold making with injection molding, and mold development with plastic injection mass production, among its business models. For technical questions or mold maintenance support, contact rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was founded in 2010. It provides mold design and tooling, precision machining, mold manufacturing, and parts production for international customers. The company reports a five-person R&D team working on mold and precision-machining development, a monthly injection-mold delivery capacity of 15–20 molds, and ISO 9001:2015 certification. It serves customers across multiple industries.