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Little things matter when it comes to overall efficiency, productivity and quality. Of course, having the best equipment and technologies, materials, know-how and training is a given. But efficiency and productivity are generally always enhanced when injection molders and their customers know each other well as partners and work together as a team. They share the same strategies. Each knows how the other thinks and operates. The relationship deepens over the long term because they know they are stronger together.
Moldflow analysis is a frequently used term in the injection molding industry but it is often poorly understood. The process uses a sophisticated computer program to analyze and predict the flow and cooling of plastic during all phases of the injection molding process. Since there are different levels of analytical software available, selecting the right one for your project is as important as interpreting the data for successful results.
In this age of global competitiveness and tough regulation, superior quality is the name of the game in differentiating you from competitors and increasing your market share.
OEMs in various industries are designing increasingly complex components, products and devices with higher injection molding tolerances that must meet stringent quality standards, regulatory compliance and cost-effectiveness. This can be achieved through scientific molding, the best designed and controlled manufacturing process possible.
Metal-to-plastic conversion is a decades old concept, and it remains a popular option for addressing concerns about component or end product cost, weight, manufacturability and compliance. While metal-to-plastic conversion is effective, many industries — notably automotive, defense and medical — are leaning into it further in order to reap more benefits by consolidating multiple existing parts into a single complex injection molded plastic part.
There are many factors that impact injection molding tolerances—all of which need to be controlled with precision to meet final part specifications. The greater the number of factors, the harder it is to achieve tight tolerances consistently. That’s why it is so important to consider tight-tolerance requirements during the plastic part design process, where factors can be addressed through design modifications without impacting quality or performance. In fact, working with an experienced injection molder like Kaysun could actually result in even tighter tolerances, if needed, through expert alignment of design, materials, tooling and production process parameters.
Medical grade polymers are quickly becoming the preferred material for a broad range of surgical devices. In certain applications, the robust mechanical properties of medical molding polymers allow complete removal of metal from the surgical device design. In other instances, plastic and metal components can combine to create an enhanced product, with attributes that would not be possible in either an all-metal or an all-plastic device.
Shrink rates for different materials vary according to the wall thickness of the plastic part. Designing wall thicknesses that are as uniform as possible helps to control the shrink rate for a specific part or product. As a consequence, non-uniform walls can lead to large pressure drops during filling, causing significant differences in shrink rates which could result in internal stresses within the part, creating warpage or other similar defects.
Manufacturers of rugged electronic devices (and their end users—for example, the military) count on their “rugged” devices to perform in challenging real-life conditions, and survive being dropped. Therefore impact resistance is a critical feature in product design and starts with material selection.
Insert molding is a type of overmolding where a hard substrate component or “insert” is placed inside a mold cavity in an injection molding machine and then “overshot” with an exterior layer—typically a thermoplastic elastomer (TPE). The interaction between the insert and the TPE must be fully understood to create the strongest possible bond. The surface of the insert should also be free of contamination, including dust or even skin oil—even the slightest contamination can weaken the bond between the TPE and the substrate, leading to premature failure.