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How To Make A Plastic Mold For Plastic Products and Parts

make a plastic Injection mold for plastic logistic loadbars

Injection molded plastic logistic load bars

Most people within the plastics industry are familiar with creating a mold for plastic products. Or, at least have a general understanding of the process that goes into it. However, some general confusion still exists with product designers, engineers, and other professionals about the ins and outs of the process. There are a number of methods to make a plastic mold for products that will be used for manufacturing multiple quantities of products. Each method will take different amounts of financial investment and time. The steps below will get you moving in the right direction to create your very own plastic mold.

1. Determine Quantity

What’s the quantity of plastic products you’ll be producing? The number of parts and custom plastic pieces you need will determine the type of molding you use, and the manufacturer you work with.

Most manufacturers require that your entire build be at least 100,000 parts or greater. If this number is too high then you may have to shop around until you find the right manufacturer who is willing to do the job for you. Contact SPI Blow Molding or SPI Industries today to discuss quantities, larger plastic blow molded pieces or plastic injection molded pieces can be produced at lower quantities and still be cost effective.

2. Your Budget

What will your budget be for this plastic mold? Your budget for your project should include the design and creation of your mold, as well as future modifications.

Your budget can also influence the method of plastic molding you use, as some are cheaper than others. Also, the more complex your overall design, the more expensive the process is going to be.

3. Overall Size and Design

The type of plastic molding your project will require will be determined by the size and design of your product. You can also adapt your design to use a specific plastic molding process. For instance, when using injection molding you’ll generally have to have a smaller design. While, blow molding is usually used to create products, such as, containers, tubes and bottles.

4. Project Materials

Your project design will influence the materials and types of plastics that need to be used. Sometimes, designs will have a specific material that needs to be used for the product to function, while other times the materials can be more flexible.

Make sure you speak with your manufacturer to ensure you’re using the right material for the job.

Plastic Molding Methods Available

There are a variety of plastic molding methods, which can be used based upon your unique project specifications.

make-a-plastic-mold-blow-molded-bellows

Blow molded plastic bellows

The most commonly used methods to make a plastic mold are:

  • Injection molding
  • Blow molding
  • Compression molding
  • Gas Assist Molding
  • Film Insert Molding
  • Rotational Molding
  • Thermoforming

By going through the process above you’ll have every specification you require to build the perfect plastic mold for your product. This isn’t a process you’ll want to rush, as a simple design flaw can have you starting the entire process again from scratch.

If you’re ready to make a plastic mold or product, or have a question about the process, contact SPI today. No question or project is too challenging for our team! We can help to guide first time product inventors through the plastic molding process, or implement a unique solution for a product redesign that your are considering.

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