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How to Approximate Plastic Injection Molds Costs: Domestic vs. Overseas

When you’re a purchasing manager, it’s your responsibility to assess quotes from various mold companies for every project. And with the help of a plastic injection molding cost calculator, your responsibility is simplified as you assess the cost-effectiveness of various options. Typically, costs for different mold makers may differ substantially based on the inputs, including drawings, prototypes, and model parts. Below are parameters based on which estimations for plastic injection mold cost may be made:

Core Material

The core metal is important to considered. It’s common for certain mold makers to use molds made of aluminum for shorter production cycles. When not acquiring the mold for lasting application, aluminum would do just fine. Yet, when your project needs a mold that serves its purpose efficiency for many years, aluminum could bring you additional long-term costs.


When you look at it, it goes without saying that a mold with fewer cavities needs less tool work and time, resulting in lower costs. Any skilled mold maker makes optimal application of cavitations to maintain maximum production rates. The overall agreement among most mold makers is that it’s better to create a single mold for each part rather than make a family mold. When it comes to family molds, numerous cavities are required for the production of assorted components. Family molds have a tendency to give low-quality products, and because of maintenance needs, their downtime is longer.

The Mold Base

The mold base is something of a case that keeps all cavities, inserts, and parts in a mold together. To approximate the cost of the base, take into account the mold size, type of steel used, and extent of needed customization. A mold base may initially have a standard size, but you may machine it further to achieve custom requirements for your project.

Machining Requirements for Core and Cavity

You need your mold customized to your specific project requirements. Your customization options for the system are numerous, for example ejectors and cores placements. Additionally, the type of steel the tool uses always has a bearing on costs. An example is a mold that utilizes hardened steel, which costs more to machine, although it lasts longest.

How Intricate a Part Is

How intricate a part is affects mold costs, just as does the number of cavities. Thus, the surface finish the ultimate product has as well as the number of required undercuts will have a bearing on costs. Mold complexity, and ultimately costs, are also affected by the requirement for tight tolerances in products.

So, if you’re trying to assess custom plastic molding costs, the above factors should be included in your overall considerations.
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