You’re finally satisfied with your plastic part design, it’s now time to consider mold selection so you can start production. But, picking the right mold maker and designing the right mold is less straightforward than you expect — you might even find yourself presented with a laundry list of new decisions to make.
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Even more confusing, you might have molding project proposals from several injection molders, all with varying designs, costs, and more. So how do you make the right selection for your project?
To help you, here are the best questions to ask before buying molds in the US:
Most of the injection molders that you can find in the US will have their areas of expertise. It’s important to ask prospective parts what they are — their answer will help you determine whether they have the experience and know-how they need to make the best mold for your application.
You could also check their website or ask them directly for their portfolio, equipment list, and reputation. What you will see is a testimony of the quality and stability of their services and products. Try also asking for a few of their client references, specifically those who work in the same field as you do. Doing this will help you see if this injection molding partner can meet the specific requirements of your industry.
Ideally, the injection molding partner you choose should follow industry standards.
The most important ones include ISO : for product quality and consistency and ISO : for environmental impact. Another industry standard to look out for is IATF, which shows that the injection molding company works on continual improvement, defect prevention, and reduction of errors in its services.
If your injection molder is adhering to all of the above standards — like Richfields does — then you can rest assured that the mold maker will go above and beyond the necessary quality requirements.
Building a new mold is one of the longest tasks in any production project. While some molds can take just a couple of weeks to design and make, some may take several months. It’s important to present your part design and ask your potential partner what the lead time will be for your mold so you can adjust your production schedule accordingly.
If your part design still needs some tweaking, you can ask for a prototype mold to be made instead, which usually takes around 3 to 6 weeks to make. If you’re ready for full production, then your mold may take upwards of 12 weeks to make.
What’s important here is that your molding partner has a clear idea of what to make and how much time they need to make it. If they can offer intermediary solutions to help with long lead times, then this is a benefit to your production.
With mold-making services in the US ranging in the thousands, you must get a quote early on to see if it aligns with your production budget. Several factors impact the cost of your mold, including mold classification, design complexity, mold cavitation, and specialty molding designs.
For example, prototype molds tend to be much cheaper than a final mold. And, having a specialized design, such as a multi-cavity mold, can also increase initial build costs.
Be upfront about what you want and need for your molds, so your potential partners will know what goes into your mold building price. And great mold maker, like Richfields, will help you find ways to make your design more cost-effective — getting you the most bang for your buck.
Where you are in your product development process is a critical factor in how your mold is made. In the early stages of prototyping and pre-production, you can typically expect a lower construction quality mold — because they are made to make short runs of your prototype, and make it more cost-effective for several design iterations.
If you’re later in the development stages, then you can request a better-built, sturdier mold that is production-ready. Be careful about selecting your molds — make sure it’s suitable for where you are in your product development process to avoid spending more money on new molds and mold repairs over time.
Depending on what geometries, features, and size you need for your plastic parts, your potential mold-making partners may need to use different mold-making approaches. Some designs will need molds made using hardened steel, or steel inserts, rather than softer metals like aluminum.
The material you’re planning to use for your plastic parts will also play a role in how the mold is designed and made. Some resins are incompatible with certain mold materials. For example, plastics like nylon will need a higher quality mold to fit part specifications.
Richfield’s molding engineers can help you examine all your part’s specifications to determine what kind of mold best suits your needs. Our team will also examine overall functionality to help in the mold design process — taking into consideration other features like snap fits, breakaways, and more to design the right mold.
You’ll also want to consider the minimum production requirements. How many parts does your mold need to make? Will you have a short production run of only a few hundred parts, or are you aiming for mass production that creates up to a million of them?
If you only need a few parts, then you could probably go for a cheaper mold made from less sturdy materials, like aluminum. But, large volume runs will probably necessitate the use of things like hardened steel inserts, which cost more but helps in meeting your production needs.
Finally, ask if your mold-making partner guarantees the lifespan of their molds. If they do, then your molds should be able to meet your production requirements with minimal risk of error or breakage. If the molder seems confident that their molds can stand up to your strict requirements, it’s a good sign that they will be fit for your application — and less likely to need adjustments or repairs.
If you are considering which plastic mold maker to work with, then use these eight questions to ask before buying molds in the US to help guide you to the right partner.
Obtaining an accurate injection molding quote is crucial for the success of your manufacturing project. A well-executed quote provides essential insights into your project’s cost, feasibility, and timeline, allowing you to make informed decisions and ensure a smooth manufacturing process.
However, to obtain an accurate quote, it is essential to consider several critical questions before approaching a manufacturer.
In this blog post, we will guide you through eight vital questions that you should consider before getting an injection molding quote.
By addressing these questions upfront, you can enhance the clarity and effectiveness of your communication with potential manufacturers, leading to more accurate and tailored quotes for your project.
Let’s delve into these eight questions and explore how they contribute to a comprehensive understanding of your injection molding project.
Before you obtain an injection molding quote, it is crucial to assess the availability of CAD drawings, prints, or samples related to the specific part you intend to manufacture. These valuable resources are vital in ensuring a smooth and accurate quoting process.
For instance, a study titled “Soft lithography for micro- and nanoscale patterning” by Qin, Xia, and Whitesides () emphasizes the importance of detailed visual representation in manufacturing processes.
Having detailed CAD (Computer-Aided Design) drawings of your part is highly advantageous when seeking an injection molding quote.
CAD drawings also help evaluate potential design modifications and optimize the manufacturing process for cost efficiency and quality.
Prints offer a two-dimensional representation of the part, complete with measurements and notes. These drawings typically include essential information such as part dimensions, tolerances, surface finishes, and any additional specifications required for manufacturing.
Providing accurate and complete prints can significantly assist the manufacturer in assessing the part’s complexity and estimating the time and resources required for its production.
In some cases, having physical samples of the part can be beneficial during the quoting process. Samples allow the manufacturer to visually inspect and evaluate the part’s design, material properties, and potential challenges in manufacturing.
Suppose a manufacturer has a physical sample of a part. In that case, they can thoroughly examine potential challenges, such as undercuts or thin walls, which may impact the mold design or production process.
If you’re planning to run parts from an existing mold, check a few things before proceeding.
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Firstly, using an existing mold can be a real-time and cost-saver. As pointed out in a scientific study, injection molding is a standard method for creating parts from reinforced thermoplastic materials.
If you’ve got a mold ready, you can skip the design and fabrication stages, speeding up the whole process.
But it’s not just about speed. You also need to think about whether the mold you have is suitable for the job. As Elham Sharifi and her team found in their research, traditional injection molding isn’t always the best fit, especially for smaller production runs.
If your existing mold isn’t up to the task, it might be worth exploring other manufacturing methods.
And let’s not forget about the potential of recycled materials. According to a study by Peter E. Caltagirone and his colleagues, recycled fiber can perform just as well as new fiber when it comes to reinforcing materials.
This suggests that recycled fiber could be used in place of new fiber in existing molds.
The part application refers to how and where the part will be used. This could range from automotive components to medical devices, each with unique requirements.
Knowing the part application can help the manufacturer determine the best materials and manufacturing processes.
For example, a part exposed to high temperatures may require a material with high heat resistance. Similarly, a part that will come into contact with corrosive substances may need a material with excellent chemical resistance.
Here are a few questions you should be prepared to answer:
Providing this information to the manufacturer at the quoting stage can help ensure the part is fit for purpose and will perform effectively throughout its lifespan.
When looking for an injection molding estimate, the quantity of pieces you want is critical information. This assists the manufacturer in determining the most efficient and cost-effective approach to building your parts.
When it comes to producing many parts, injection molding is frequently the best option. This is because, as Jason A. McNulty and his colleagues pointed out in their paper, it is a mass-production technique that can handle enormous volumes.
But what if you simply require a few parts? In that situation, consider alternatives to injection molding.
According to Haden Edward Quinlan’s study, additive manufacturing (AM) can be an intelligent solution for smaller production runs since it can reduce prices and lead times.
For low-volume production, consider 3D printing and CNC machining. These technologies provide greater flexibility and may be set up faster than injection molding.
Here are a few additional things to consider:
The part size can influence the type of injection molding machine required. Larger parts typically require larger machines with higher clamping forces to hold the mold closed during the injection.
Additionally, larger parts may require more material and longer cooling times, increasing the cycle time and overall production cost.
The part’s complexity refers to its design’s intricacy, including features such as undercuts, thin walls, or complex geometries. More complex parts may require advanced mold designs, such as multi-part molds or molds with movable sections.
These complexities can increase the cost of the mold and the time required for mold design and fabrication.
The type of polymer or resin required for the part is another critical factor when seeking an injection molding quote.
Different polymers and resins have varying properties that can impact the part’s performance, durability, and appearance.
Different polymers and resins perform differently in various environments. For example, if the part will be used outdoors, a UV-resistant material like polyethylene terephthalate (PET) might be an excellent choice to prevent degradation from sunlight.
The choice of material can also impact the look and feel of the part. For example, if a glossy finish is desired, a material like acrylonitrile butadiene styrene (ABS) might be suitable. On the other hand, for a matte finish, polypropylene (PP) could be a good choice.
The complexity of the part can also influence the choice of material. For example, if the part has thin walls or intricate details, a material with good flow properties, like polystyrene (PS), might be needed to ensure the material fills the mold properly.
If sustainability is a priority, consider using a biodegradable polymer like polylactic acid (PLA) or recycled material. However, these materials may have different properties and costs than traditional polymers and resins.
Lead time refers to the total time required to produce and deliver the parts when the order is placed.
Here are a few factors that can alter the lead time of your project:
The manufacturing process outlines the steps and techniques used to create a part.
In the realm of injection molding, this process typically unfolds in the following stages:
By addressing these eight questions before seeking a quote, you can provide potential manufacturers with the information they need to give you an accurate and tailored quote.
This helps ensure that your project is feasible and cost-effective and will be completed on time and to the highest quality standards.
Remember, every detail matters when it comes to manufacturing. The more information you can provide upfront, the better the outcome.
So, take the time to consider these questions carefully and communicate your needs clearly to your manufacturer.
At Kemal, we live and breathe high-quality plastic injection molding. Our industry experts are on a mission to exceed your manufacturing expectations.
From the first quote to the final flawless delivery of your parts, we’ve got you covered.
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