12 Feb Why High-Precision Plastic Parts Require More Than Just a Mold
Advances in material science, manufacturing technology, and design capabilities have altered consumer expectations, placing a greater emphasis on sustainability, reliability, and affordable high-quality. In response, product development teams increasingly focus on creating designs with features that have little margin of error. Tight angles, limited clearances, thin walls, narrow channels, and complex assemblies are more prominent today than just ten years ago. While these innovative designs may work on paper, function in interactive CAD programs, and pass through prototyping, their tight tolerance features may not feasibly translate at scale.
The Disconnect Between Design and Reality in High-Precision Plastic Parts
In traditional build-to-print settings, manufacturers excel at following directions without question. To produce plastic parts exactly to specification, they source or create the molds and tooling using computer programming, specialized replicas, or the actual prototype components themselves. For basic components with standard features, this can produce parts that fall within acceptable tolerances. However, when precision is critical to optimal performance or ease of assembly, plug-built molds can result in tolerance stacking, additional secondary process requirements, prolonged assembly times, and costly rework. This is especially true when components are sourced from multiple manufacturers.
The Case of Misaligned Suppliers
Take a simple portable water cooler as a prime example of how a slight disconnect between design intent and real-world production can derail product launch, inflate costs, and damage reputations. These types of products generally consist of a double-walled shell with air or insulation material in the cavity, a similarly constructed lid, a dispensing nozzle assembly, and a handle. It takes multiple processes including injection, blow, and insert molding to manufacture the plastic parts, and each may demand a different material to meet performance requirements.
In these situations, the product designers tend to source each component from a provider that specializes in that particular process and enlist an assembly contractor for the final steps. Throughout the first production run, vendor reports and test data may indicate everything is within tolerance ranges, promising a successful, on-time launch. Until two weeks before the expected delivery date, when parts begin arriving at the assembly plant.
- Within tolerance parts don’t fit together
- Seams don’t line up
- Excessive flash mucks up the workflow
- Air bubbles and surface defects increase scrap rates
- Assembly becomes a bottleneck that produces ‘good enough’ products
- ‘Good enough’ products are prone to out-of-box failures
Even though each vendor produced plastic parts to specification, the final assembly didn’t meet expectations due to misaligned quality systems and disconnected process expertise.
The Solution Lies in Engineering Partnerships
In the example above, the costly delays could have been avoided if the product designer had partnered with the plastic parts engineering experts at a full-service manufacturer like Quantum Plastics from the beginning.
Early DFM Engineering Prevents Downstream Bottlenecks
DFM, or design for manufacturability, is an underutilized service that takes in the whole picture, predicts potential problems, and corrects issues at the earliest stages. Our plastic part engineering experts can drastically reduce production delays and costs by evaluating designs, and providing guidance on everything from manufacturing processes and design alterations to alternative materials and assembly methods. In many cases, DFM engineering can reduce material requirements, eliminate secondary processes, improve production efficiency, and enhance final product quality.
Single-Source Multi-Process Production Eliminates Tolerance Stacking
Maintaining comprehensive capabilities in-house connected to the same quality system ensures every component is manufactured to specifications with tolerances aligned with each other. This also allows for immediate correction if parts drift out of tolerances, reducing the delays (and the resulting expenses) of sending parts back for rework. With multiple plastic molding processes, secondary operations, assembly, and decorative accents handled by the same team, full-service partners can confidently recommend alternatives that can further streamline production and cut costs.
Advanced Mold and Tooling Design Produces Precision Plastic Parts
A mold based on a plug or prototype may produce an exact replica under perfect conditions, but the manufacturing environment is anything but perfect. When hot material moves through complex molds, certain features can obstruct flow, introduce air pockets, or allow leakage. Leveraging advanced technology and decades of experience, Quantum Plastics carefully engineers molds and tooling to ensure optimal material flow while maintaining intricate specifications.
Quantum Plastics is Your Full-Service Plastic Parts Manufacturing Partner
From expert DFM guidance to multi-process manufacturing and assembly, Quantum Plastics is ready to help ensure your product’s success via optimized design and production processes. Contact us today to learn more.