Purpose of Surface Treatments and Texturing for Injection Molds

Injection molds utilize coatings and treatments to prolong life or add performance. This is due to the plastics materials that are harsh on injection molds and when conditions are aggressive.  

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Tips on Purchasing Injection Molds and Molded Components

It pays to understand the processes and possible snags within the injection molding industry to make a more educated decision when purchasing services for your project.   Buyers should know they will need to establish a mechanism to monitor and assess the supplier's output - such as ISO certifications or FDA registration.  This helps to verify the injection molder meets industry standards.  Buying custom injection molded plastic parts can vary based on the quantity, material and complexity of the part.  Here are a few tips to help you through the purchasing process for your plastic component or device.

Cost of the Injection Mold 

The injection mold is the most visible expense of your project.  Size and the complexity of the part to be molded and the number of cavities of the injection mold are major influences on the initial price of the mold.  Therefore, there are a few approaches to mold fabrication that can be considered.

To further understand the purchasing of an injection mold - you need to understand what are mold bases and why are they required.  The mold base holds all of the mold cavities, inserts and components together.  The cost of the mold base is established on the size, type of steel and the customization required.  Most mold bases come in standard sizes, and are further machined to meet the requirements of a specific project.   

Commercial injection mold bases are made from pre-hardened steel where the part geometry is machined either directly into the mold plates or into inserts specific only to that mold.  In addition to the part, runner and gate geometry, all the mechanical elements of the mold (such as the leader pins and bushings, ejector system, sprue bushing, support pillars, etc.) need to be designed, machined and installed for each new mold. 

Sometimes aluminum or mild steel mold bases are used to manufacture prototype injection molds or short run injection molds.

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Injection Molding of Plastic Components with Threads and Undercuts

Threads and undercuts in plastic injection molded components require some special considerations and methods for manufacturing.    

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How You Can Minimize Risk for Your Outsourced Injection Molded Parts

Minimizing risk for outsourced custom injection molded plastic components is accomplished by using the right tools.  Here are some of the tools that can be used to mitigate risk for your injection molded components. A well defined quality management systems that relies on Product/Process Failure Mode and Effect Analysis (PFMEA). Utilizing Mold Fill Simulation to minimize any potential for risk.  

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Strategies for Outsourcing Your Plastic Device or Component

When companies are smart enough to take advantage of the expertise of their molding partners, the result is to have the most effectively molded parts possible.   This is a smart, strategic decision, especially when it comes to complex manufacturing.  

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