Injection molding in China — engineering first, tooling done right, parts that pass
P&A International runs plastic injection molding projects end to end: design-for-molding review, mold design and build, T1 sampling with measurement data, and volume production — through a vetted network of partner mold shops and molding plants in China, every supplier ISO 9000 certified or better.
Founded as an engineering consultancy in 2008, we put one dedicated engineer on your project. Your engineer challenges wall sections and gate locations before steel is cut, supervises trials, and signs off parts against your drawing — not against a fast invoice.
consultancy + manufacture
per project, end-to-end
qualified samples with test data
every supplier certified or better
mold steel, drawings and IP stay yours
Injection molding services
Mold design & build
P20, 718H and H13 tooling from prototype to million-shot class — with mold-flow analysis where geometry warrants it.
Production molding
50 t to 1,300 t presses across the partner network — engineering resins, high-cavitation and tight-tolerance work placed on the right machine.
Prototype first
CNC-machined or 3D-printed part prototypes validate fit and function before you commit to tooling.
Overmolding & inserts
Insert molding, overmolding and 2-shot for seals, soft-touch grips and integrated metal hardware.
Tool transfer service: existing molds are inspected, refurbished where needed and re-qualified with full dimensional reports.
Engineering capability
- Design-for-molding review: draft, wall sections, gates, ejection, sink and warp risk
- Mold-flow analysis on demanding geometries before steel is cut
- Tool classes from low-volume aluminum and P20 to hardened H13 million-shot molds
- Engineering resins: ABS, PC, PA6/PA66 (glass-filled), POM, PBT, TPU, TPE, PP, PE
- Insert molding, overmolding, 2-shot and gas-assist where the design calls for it
- T1/T2 sampling with dimensional reports against your drawing before approval
- In-process SPC on critical dimensions; capability studies on request
- Secondary operations: ultrasonic welding, pad print, paint, EMI shielding, assembly
At a glance
| Press range | 50 t to 1,300 t across partner plants |
| Tool classes | Prototype aluminum to hardened H13 production molds |
| Resins | Commodity + engineering grades incl. glass-filled |
| Tolerances | To DIN 16742 / part-specific on critical dims |
| Tooling lead time | Typically 4-8 weeks to T1 depending on tool class |
| Sampling | T1 with full dimensional report; iterate to approval |
| Production | Hundreds to millions of shots per year |
| Quality file | FAI, material certs, SPC data, colour plaques |
Why engineers & buyers choose PA
For design engineers
Molding problems are designed in long before they are molded in. Your dedicated engineer reviews draft angles, wall transitions and gate positions at quote stage, flags sink and warp risk, and recommends the tool class your volumes actually justify — so T1 surprises become rare and cheap instead of common and expensive.
For purchasing
You own the tooling, the drawings and the data. Mold steel is identified and stored at the partner plant under our supplier agreement, T1 reports and material certificates come as standard, and pricing separates tooling from parts so you can compare honestly — every supplier in our network is ISO 9000 certified or better.
3 easy steps to get started
Send part data
STEP file plus 2D with critical dims, resin and annual volume. A sample part works too.
DFM + tooling proposal
Design-for-molding feedback, tool class recommendation and itemised tooling + part pricing.
T1 to production
Sampling with measurement reports, then volume supply with SPC on the dimensions that matter.
Applications
Typical molded work spans industrial equipment housings, electrical enclosures and connectors, automotive interior components, appliance parts, medical device housings, and high-cavitation consumable parts — in commodity and glass-filled engineering resins, with secondary printing, welding and assembly where needed.
Need a quote rather than the technical tour? See our plastic injection moulding service. Related processes: die casting, CNC machining and metal stamping.
Which tooling route fits your volumes?
Tool class is an economic decision — a quick orientation:
| Machined / printed prototype | Validate fit and function before any tooling spend |
| Aluminum / soft tool | Hundreds to ~10k shots — fastest, cheapest entry to molded parts |
| P20 / 718H production tool | Tens to hundreds of thousands of shots — the volume workhorse |
| Hardened H13, high cavitation | Million-shot programs and abrasive glass-filled resins |
| Tool transfer | Existing mold? We inspect, refurbish and re-qualify it at a vetted plant |
What to send us for a fast, accurate quote
The more of this you can share, the quicker we can return a proposed tooling and part plan and price:
- 3D model (STEP/IGES) and 2D drawing with critical dimensions
- Resin and colour (or performance requirements so we can propose)
- Annual volume and batch sizes — they drive tool class
- Cosmetic surface requirements (gloss, texture, paint)
- Existing tooling details if this is a transfer
Not sure about resin or tool class? Send the application and your engineer will propose options with trade-offs.
Get a quote
Describe your molded part and one dedicated engineer will reply with DFM feedback, a tooling recommendation and itemised pricing.
One dedicated engineer reviews every enquiry and replies with a proposed tooling and part plan and indicative pricing. Your details are used only to respond to your enquiry. Prefer email? support@pa-international.com.au