With recent advances in technology and product design, consumer expectations are at an all-time high across all industries. Quality has always been essential to a brand’s reputation, but with the rapid dissemination of information on the internet, it’s more important than ever to make sure your products perform and function at optimal levels. One way to ensure this is to choose the right manufacturing method for the parts and components that make up your product. Precision injection molding is one such method. But “precision” is a word that gets bandied around a lot in the injection molding industry. So what exactly denotes true precision injection molding and what does it look like for high-volume orders? Let’s find out.
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Precision injection molding is a specialized manufacturing process that focuses on producing highly accurate and consistent plastic components with tight tolerances. Industries that require intricate and exact parts—such as the medical device, electronics, high-end consumer, and automotive sectors—benefit greatly from precision injection molding.
In order to deliver precision molded parts, manufacturers often employ advanced machinery and techniques to control every aspect of the process, including temperature, pressure, and material flow. Precision injection molding also typically relies on the principles of scientific injection molding, which involves using data-driven approaches to optimize the process. With in-depth analysis and real-time insights, the process can be fine-tuned to meet the exact needs of unique and complex parts.
Precision injection molding encompasses a range of capabilities that enable the production of highly accurate plastic parts. Some of these capabilities include:
Precision injection molding is not just crucial for complex, high-tolerance components; it also plays a significant role in high-volume production of simpler parts and brings a number of benefits, including:
Even for simpler parts, maintaining consistent quality across thousands or millions of units is essential. Precision injection molding ensures that each part in a high-volume production run meets exact specifications, minimizing variability and defects.
High-volume production leverages economies of scale and precision injection molding can optimize material use and cycle times. Together, this results in a reduction of the overall production costs and helps ensure that the initial investment in high-quality molds pays off by minimizing scrap and rework.
Advanced precision molding machines are capable of high-speed cycles, which is critical for meeting the demands of high-volume orders. Faster cycle times without sacrificing quality lead to quicker turnarounds and higher throughput.
And finally, high-volume production benefits from the reliability and durability of precision molds, which are designed to withstand extended runs. This minimizes downtime that is often caused by mold maintenance or failure, which ensures a smoother production flow.
On a similar note, precision injection molding (like most other injection molding processes) are highly scalable, making it easy to ramp up production from prototype to full-scale manufacturing without compromising quality.
At Thogus, we offer high-volume injection molding services with a focus on precision and accuracy. As an Ohio-based manufacturer that has been around since the s, we’ve had the time to develop our skills and expand our capabilities to offer end-to-end solutions for a wide range of industries. Outside of our injection molding capabilities, we also offer material selection support, engineering support, assembly, and inventory management with JIT deliveries.
Injection molding can handle highly complex parts, provides uniformity, and offers the ability to make millions of virtually identical parts. The effectiveness of high-volume injection molding and maximization of precision and quality of parts means taking key design elements into account.
The part design must be created to maximize the efficiency inherent in high-volume molding. With the ideal design, parts can be made with quality without sacrificing complexity.
There are a few good reasons that this is the most common and most efficient form of molding. First, the injection molding process is rapid compared to other methods, and the high production output rate makes it even more effective.
The speed is subject to the complexity and size of the mold, but only about 15-120 seconds pass between each molding cycle. With the short period between cycles, more injection molded parts can be produced in a given production time.
The strength and durability of plastics have significantly increased over the years. Modern lightweight thermoplastics can endure even the harshest environments on par with metal parts and, in some cases, may surpass metal.
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In addition, there are more than 25,000 engineered materials that can be used for complex injection-molded applications. High-performance plastic blends and hybrids can also be created to meet particular part requirements and characteristics, such as high tensile strength.
The plastic injection molding process provides flexibility. This flexibility can be in such things as the properties of the plastic being used or in the ability for OEMs to make custom color choices to meet specific project requirements. The benefit of plastic injection molding is the freedom in design choices that it affords to OEMs, especially when compared to metal. Many materials can be used.
The molding process can create clear parts or various colors by aligning plastics, additives, and biocompatibility to achieve the wanted coloration. However, when multiple colors are often needed in one product, this can be accomplished using overmolding.
The plastic injection molding process produces very little post-production scrap relative to traditional manufacturing processes. Any waste plastic typically comes from the sprue and runners. Any unused or waste plastic, however, can be reground and recycled for future use.
Labor costs for injection molding operations are relatively low compared to other types of molding processes. The capacity to produce the parts at a very high level with a high output rate helps reduce manufacturing costs through its efficiency and effectiveness.
The molding equipment usually flows with a self-gating, automated process tool to keep operations streamlined and mass production ongoing with minimal supervision.
Most injection-molded parts have a smooth surface finish close to the desired final look. However, a smooth appearance isn’t suitable for every application. Depending on the physical and chemical properties of the plastic material used, the plastic injection molding manufacturing process creates surface finishes that don’t require secondary operations. The process provides finish flexibility, from matte finishes and unique textures to engraving.
Although they are most widespread in the automotive industry, OEMs use lightweight plastic injection molded products in many industries. Using plastic parts helps reduce weight compared to the use of metal parts. Today, high-strength, lightweight thermoplastics can replace metal components with virtually no difference in strength or durability, only in weight.
Complex part designs often require components made of different materials. While this may seem simple, safely combining plastics can be tremendously complicated. By guaranteeing compatibility under all circumstances, plastics expertise from the molder’s project engineers mitigates defects, injury risks, and warranty claims.
Producing high-output yet complex plastic parts requires a consistent, repeatable process to achieve designs with tight tolerances. The injection molding production process helps ensure consistent quality by continually using the same mold for each part, backed by an injection molder’s continuous improvement practices that incorporate current leading-edge technologies.
Modern high-speed injection mold equipment that is appropriately maintained allows for the mass production of precision molded plastic parts. For the production of plastic components such as connectors and gears that require high precision production, this molding process is the best choice and offers tolerances as tight as +/-0.”.
Different skill sets of injection mold engineers can help OEMs achieve a shorter product development timeline. Doing so ensures faster production cycles and getting defect-free parts to market faster — a decided competitive advantage for manufacturers.
This article summarized 12 key advantages of the plastic injection molding process.
Xometry offers a full range of injection molding capabilities to help with your production needs. Visit our website to explore the full range of our capabilities, reach out to us for help with your injection mold design questions, or to request a free, no-obligation quote.
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