In injection molding, ejector pins (also called ejector pins or knockout pins) play a crucial role in ensuring smooth demolding of plastic parts. These small but vital components push the cooled plastic product out of the mold cavity, preventing manual removal and improving production efficiency.

However, if ejector pins are improperly designed or maintained, they can cause defects like sticking, marks, or even damage to the molded part. In this blog, we’ll explore:

What ejector pins do

Different types of ejector pins

Common problems and solutions

How to choose the right ejector pin

 

Common Causes of Mold Sticking1. Insufficient Draft AnglesProblem: When vertical walls don't have adequate taper (typically 1-3° minimum), the plastic part can mechanically lock into the mold.Example: We once designed a medical device housing with apparent 1° draft angles. However, subtle texturing

Molds (also called "tools" or "dies") are essential in manufacturing, used to mass-produce plastic, metal, and ceramic parts with precision. From smartphone cases to car bumpers, molds enable high-volume production with consistent quality.

But how exactly are molds made? This guide breaks down the mold manufacturing process, materials, and key technologies involved.

Plastic manufacturing relies on various techniques to create products with different shapes, strengths, and functionalities. Two of the most common methods are injection molding and blow molding. While both processes involve melting plastic and shaping it in a mold, they differ significantly in their approach and applications.

This article explores the differences between injection molding and blow molding, their advantages, and real-world uses to help you determine which method is best for your project.

Injection molding is a highly efficient manufacturing process for mass-producing plastic parts. One of the key factors affecting efficiency and part quality is the runner system—the channel that delivers molten plastic into the mold cavity. While cold runners are simple and cost-effective, hot runner systems offer superior performance for high-volume production by eliminating waste and reducing cycle times.
In this blog, we’ll explore the different types of hot runner systems, their advantages, and how to choose the right one for your application.

Injection molding is a widely used manufacturing process for producing plastic parts, and the choice of runner system plays a crucial role in efficiency and part quality. Cold runner systems are a traditional yet reliable solution, offering simplicity and cost-effectiveness. In this blog, we’ll explore the types of cold runners, their applications, and how they compare to hot runners.

Medical injection molds require high precision, cleanliness, and compliance with strict industry standards (such as ISO 13485 and FDA regulations). At the same time, manufacturers must optimize production speed and cost-effectiveness. Below is a step-by-step guide to achieving an efficient mold-making process for medical applications.

The escalating tensions between the United States and Iran pose significant risks to global trade, particularly in energy markets, shipping routes, and supply chains. With Iran being a key player in oil exports and a strategic link in Middle Eastern commerce, any military confrontation or intensified sanctions could trigger economic shocks worldwide. Below is an in-depth analysis of the potential trade disruptions.

The lifespan of a mold is typically measured by its number of opening/closing cycles before failure. However, this number is not the sole determinant—multiple factors influence how long a mold can maintain precision and functionality. Below, we explore the five major factors that affect mold longevity and how they manifest in real-world applications.

In the world of surface decoration for plastics, metals, glass, and other materials, screen printing and pad printing are two of the most widely used techniques. Each has its strengths and limitations, making them suitable for different applications. This blog provides a detailed comparison to help you choose the right method for your project.