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What Is SIS in 3D Printing?

Selective Inhibition Sintering (SIS) is an additive manufacturing ( 3D printing ) process that offers an alternative to more conventional powder-based metal or polymer sintering techniques like Selective Laser Sintering (SLS). Developed by researchers (notably at the University of Southern California), SIS seeks to produce parts by inhibiting sintering (or melting) in certain regions, rather than directly sintering or melting all regions via high-energy sources (lasers, electron beams, etc.). What is SIS in 3d printing ? In simpler terms, in SIS you deposit a base powder (metal or polymer), then selectively apply an inhibitor over the areas you don't want to sinter. Afterwards, you subject the whole thing to a sintering furnace (heat), which fuses the non-inhibited regions to form the final solid object, while the inhibited regions remain loose or non-sintered, acting as sacrificial or “support” material. After sintering, the loose material can be removed, leaving the desired ...
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What Is the ISO Standard for Injection Molding?

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Injection molding is a mature, highly precise manufacturing method primarily for plastics (and sometimes elastomers). Because many industries demand consistent quality, interchangeability of parts, and safety assurance, ISO (International Organization for Standardization) standards play a key role in defining norms for processes, testing, safety, quality, and terminology. However, there is no single ISO standard that covers everything about injection molding. Rather, a network of ISO standards applies to various aspects—test specimens, machinery safety, testing protocols, tolerancing, quality systems, domain-specific standards, etc. This article surveys the major ISO standards relevant to injection molding : what they cover, how they are used in practice, and what considerations manufacturers and designers should be aware of.   Brief Overview: What Is ISO? ISO (International Organization for Standardization) is a global, non-governmental body that develops and publishes...
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Factors to Consider in Injection Mold Design？

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Injection molding is one of the most widely used manufacturing processes for producing plastic parts in high volume with consistent quality. At the heart of this process lies the injection mold design —a critical step that determines not only the efficiency of production but also the performance, durability, and cost-effectiveness of the final product. A well-designed mold reduces cycle time, minimizes defects, and prolongs tool life. On the other hand, poor design choices can lead to warpage, sink marks, excessive scrap, or costly maintenance. Whether you are an engineer, a product designer, or a manufacturer, understanding the key factors in injection mold design is essential for successful project execution. This article explores in depth the factors to consider in injection mold design , covering technical, material, and economic perspectives to guide you toward creating effective and reliable molds.   1. Understanding Injection Mold Design Basics Before diving into t...
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The Common Plastic Injection Molding Defects

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Plastic injection molding is one of the most widely used manufacturing processes for producing high-volume, complex, and precise plastic parts. From automotive components to consumer goods, medical devices, and packaging, this process provides efficiency and consistency. However, even with advanced machinery and high-quality molds, defects can still occur during production. These defects not only compromise product quality but also increase scrap rates, downtime, and costs. Understanding the common plastic injection molding defects —their causes, prevention, and solutions—is crucial for manufacturers aiming for consistent, high-quality output. This article explores the most common defects in injection molding , providing in-depth explanations and actionable solutions.   1. Short Shots Definition : A short shot happens when molten plastic does not completely fill the mold cavity, leaving incomplete parts with missing sections. Causes : Insufficient injection pressu...
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