Injection molding sink marks are caused by uneven wall thickness, thick bosses and ribs, poor gate design, insufficient packing, uneven cooling, and material shrinkage. This guide explains how to prevent and fix sink marks through part and mold design, process optimization, material selection, and early DFM analysis.

Learn the fundamentals of injection mold gate design, including four common gate types, gate placement rules, sizing formulas, and solutions to common molding defects. This guide helps engineers choose the right gate design, improve filling and packing, reduce defects, and minimize mold rework.

DFM analysis helps identify injection molding design issues before mold manufacturing begins. It can reduce the risk of sink marks, warpage, and other defects, lower mold costs, minimize mold trials, and shorten the overall development cycle.

Injection mold cost can range from a few thousand dollars to over $50,000 depending on part size, complexity, material, tolerance, cavity number, and production volume. This guide explains the 10 key factors that influence injection mold pricing and how smart design decisions, such as DFM optimization, can help reduce tooling costs without affecting product performance.

Moving from a prototype to mass production involves much more than simply building a mold. This guide explains the complete product development workflow, from prototype validation and DFM analysis to mold design, tooling, mold trials, and quality-controlled production. It also compares CNC machining, 3D printing, and vacuum casting for different development stages, helping engineers and product developers reduce risk, shorten lead times, and prepare for successful injection m

Discover why SLS 3D printing is becoming the preferred solution for lightweight, functional parts across robotics, medical devices, aerospace, and industrial manufacturing. This guide covers engineering materials, DFAM principles, post-processing, SLS vs. MJF, and practical tips for rapid prototyping and low-volume production.

Discover how SGPROTO manufactured a medical service robot housing from CNC prototype machining to low-volume production. Learn about our precision machining, surface finishing, painting, assembly, and complete prototype manufacturing solutions for robotics companies worldwide.

A practical breakdown of how we prototype different robot types — vacuum robots, medical robots, humanoids, robotic arms, and AMRs — covering process choices (CNC, SLA, vacuum casting), typical lead times, and why each material or method gets picked for that specific robot category.