Tooling + Injection Molding for OEMs — DFM-First Quotes in 24 Hours
Topworks supports procurement and engineering teams with stable mass production — not just a low tooling number. Send CAD + requirements and receive a quote-ready cost range with written assumptions (cavities, cycle time, scrap, steel, and scope).
What we manufacture
Focused on OEM programs that need repeatable mass production
Topworks supports prototype tooling to production across three categories. If your part has undercuts, tight CTQs, or cosmetic zones, we treat those as first-class requirements during DFM.
Automotive parts
Functional components with CTQ control, stable cycle time planning, and disciplined change management.
Electronics enclosures
Cosmetic zones + assembly fit aligned early to reduce sink/flow marks, warpage, and flash risk.
Appliance parts
Stable output for structural and cosmetic parts, with optional labeling/packaging aligned to spec.
Capabilities snapshot
Tooling + production built for stability
DFM-first
Draft, parting line, gating, ejection, cooling concept aligned before steel cutting.
Undercuts
Slides/lifters/side actions designed for maintenance and repeatable demolding.
Runner systems
Cold runner or hot runner — chosen based on resin, volume, and waste control.
Materials
PP/ABS/PC/PA/POM + filled resins (wear considerations included in scope).
CTQ control
CTQ dimensions confirmed early; measurement approach aligned to avoid disputes.
Quote clarity
We write assumptions (CT, scrap, scope) so procurement can compare suppliers fairly.
Comparable quote
We state assumptions in writing to prevent surprises
Many “cheap” molds produce expensive parts for years. We make quotes comparable by documenting what’s assumed and what’s included.
| Quote assumption | What we define | Why it matters |
|---|---|---|
| Cycle time (CT) | Target CT + how it will be validated during trials | CT drives unit cost and capacity |
| Scrap rate | Expected scrap + key controls | Scrap changes true part cost |
| Tooling scope | Steel, cavities, mechanisms, runner, finish, included trials | Avoids scope gaps and add-ons |
| Quality scope | CTQ measurement method, inspection level, reporting | Prevents acceptance disputes |
| Change management | Revision control + approvals | Stops uncontrolled rework |
| Packaging / shipping | Label/pack spec + incoterms | Avoids logistics surprises |
Process
DFM → Tool design → Trials → Ramp-up
A simple process with clear deliverables protects cost, quality, and timeline.
Case studies
Measurable improvements, not generic claims
Automotive part — warpage reduced
Measured deformation, modified slide/core geometry, refined parameter window to stabilize output.
Electronics enclosure — appearance zones aligned
Aligned cosmetic zones early, clarified CTQs & measurement method, reduced late rework risk.
Appliance part — predictable unit cost at volume
Documented CT/scrap/scope to keep quotes comparable and avoid production cost surprises.
Quality deliverables
ISO system + practical documentation
ISO certification matters — but procurement needs deliverables. Depending on requirements, Topworks supports:
FAQ
Questions procurement teams ask before approving a supplier
What do you need for an accurate injection molding quote?
Are you an ISO-certified injection molding company in China?
How do you make supplier quotes comparable?
Can you support automotive parts, electronics enclosures, and appliance parts?
What affects unit cost the most in mass production?
Factory proof
Material, Hardness, CTQ & Compliance Verification
Real factory evidence used in injection mold tooling and mass production programs.
Topworks injection molding capacity:15 injection molding machines with 160–800T clamping force, plus 4 electric drying ovens and 8 mold temperature controllers (80–150°C). This setup supports stable molding conditions, better dimensional consistency, and repeatable quality for both engineering plastics and general-purpose resins.
Quick capability facts
- Injection machines: 15
- Clamp tonnage: 160–800T
- Drying ovens: 4 (electric)
- Mold temp controllers: 8
- Temp range: 80–150°C
Topworks injection molding capacity:15 injection molding machines with 160–800T clamping force, plus 4 electric drying ovens and 8 mold temperature controllers (80–150°C). This setup supports stable molding conditions, better dimensional consistency, and repeatable quality for both engineering plastics and general-purpose resins.
Quick capability facts
- Injection machines: 15
- Clamp tonnage: 160–800T
- Drying ovens: 4 (electric)
- Mold temp controllers: 8
- Temp range: 80–150°C
FAQs: injection molding from China
China Injection Molding
Key questions buyers ask before sourcing from China
China injection molding refers to sourcing injection molded plastic parts and tooling from manufacturers based in China.
Chinese suppliers typically offer a full-service solution including mold design, mold manufacturing, injection molding production, assembly, and global shipping.
This model is widely used by startups, SMEs, and global brands due to competitive pricing, strong manufacturing infrastructure, and scalable production capacity.
Companies choose China injection molding mainly for:
• Lower mold and part costs compared to US or Europe
• Mature supply chain for steel, resins, and mold components
• Ability to handle both low-volume and high-volume production
• Faster scaling once the mold is validated
Quality can be very reliable when working with the right supplier.
Reputable Chinese injection molding factories follow ISO 9001, use standardized mold bases, controlled steel grades, and conduct dimensional inspections and trial reports.
However, quality varies widely across suppliers, making supplier selection, DFM review, and clear specifications critical.
Typical cost advantages compared to Western countries:
Mold cost: 30–50% lower depending on complexity
Part cost: 20–40% lower at medium to high volumes
Labor-intensive operations: Significantly cheaper for assembly and secondary processes
Total cost should always include tooling, part price, logistics, duties, and quality risk.
Typical timelines are:
Mold design & DFM: 3–7 days
Mold manufacturing: 4–8 weeks
First trial (T1): After mold completion
Mass production: 7–14 days after mold approval
Complex molds with slides, lifters, or hot runners may require additional time.
Common risks include:
• Inconsistent quality between samples and mass production
• Communication gaps on tolerances and specifications
• IP protection concerns if agreements are unclear
• Shipping delays or logistics disruptions
These risks can be reduced through proper supplier vetting, clear contracts, and ongoing quality control.
Key criteria include:
• In-house mold making capability
• Transparent steel grades and mold standards
• DFM and moldflow support
• Proven export experience and references
• Clear communication and documented quality control process