For most injection molds, P20 covers general-purpose work up to about 300,000 shots, NAK80 is the choice when you need a mirror finish and high cavity counts, and S136 stainless is what you specify for medical, food-contact and corrosive or glass-filled resins.
How to Choose an Injection Mold Manufacturer in China: 7-Step Guide (2026)
Choose an injection mold manufacturer in China by verification, not by presentation: ask for the machine list, a written DFM report, the dimensional report from first article and a defined handover pack before you place the order. A supplier who cannot produce those four things is a broker with a website.
5 Key Factors That Affect Injection Mold Cost: Complete Pricing Guide
Five factors move an injection mold quote more than anything else: cavity count and part complexity, the steel grade you specify, how well the tool is cooled, the tolerance and surface finish you ask for, and how large the tool has to be. Everything else on a quotation — freight, packaging, spare parts — is rounding by comparison.
Plastic Materials for Injection Molding: How to Choose the Right Resin for Your Product
Choosing the right plastic material for your injection molded product is one of the most critical decisions in the product development process. The wrong material can lead to part failure, excessive costs, or manufacturing delays. This FAQ guide covers the most common questions about plastic material selection to help you make an informed choice.
Injection Mold Manufacturing FAQ: Lead Time, Mold Life, Cost & Quality Explained
When you’re sourcing a custom injection mold, questions about lead time, lifespan, cost, and quality are top of mind. Below we answer the five most common questions our engineering team receives from OEMs and product companies worldwide.
Case Study: Precision Medical Device Components for Diagnostic Imaging Equipment
At RCH Plastic, we specialize in manufacturing high-precision injection molded components for the medical device industry. This case study details our collaboration with a European diagnostic equipment manufacturer to produce critical plastic parts for their next-generation CT imaging system — a project that demanded exceptional dimensional accuracy, material biocompatibility, and repeatable quality across production runs.
How Much Does a Plastic Injection Mold Cost? Price Breakdown for 2026
A plastic injection mold typically costs between $3,000 and $100,000+ depending on part complexity, mold material, cavitation, and production volume. Simple single-cavity aluminum prototype molds start at $3,000–$6,000, while production-grade multi-cavity steel molds for complex parts range from $15,000 to over $100,000. For most small-to-medium plastic parts, expect to invest $5,000–$25,000 for a quality production mold.
Common Injection Molding Defects: Root Causes and Practical Solutions
No matter how well a mold is designed or how precisely a machine is calibrated, injection molding defects happen. The difference between an average shop and a great one isn’t zero defects — it’s knowing what causes them and how to fix them fast.
Design for Manufacturing: 7 Critical DFM Rules for Injection Molded Parts
Design for Manufacturing (DFM) is one of the most overlooked yet most impactful stages in the injection molding process. When done right, DFM can reduce tooling costs by 20-40%, shorten cycle times, and nearly eliminate post-molding defects. When ignored, it leads to expensive mold modifications, delayed timelines, and parts that simply don’t work as intended.
Injection Molding Design Guide: 15 Essential Rules for Better Plastic Parts
Designing plastic parts for injection molding isn’t just about making them look good — it’s about making them manufacturable. A well-designed part reduces mold cost, shortens production time, and eliminates defects. A poorly designed one? It can cost weeks of delays and thousands in tooling rework.