An injection mold generally costs between $1,000 and $80,000. A number of factors, including size and complexity, impact the final price. At Rex Plastic, the average price for an injection mold is $12,000. To read more about the cost of injection molding, check out our blog.

These materials are generally stronger or have special properties that make them suitable for specialized functions. Additives and other components can make these plastics even more durable but do add to the price.

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Unsurprisingly, the most common type of multi-shot moulding is the double-shot injection moulding, or what is commonly known as 2K injection moulding.

Materials with the lowest cost, generally polypropylene and polyethylene, are incredibly versatile and are used to make everything from milk jugs to car batteries. These are the materials most people use every day and low material costs help make mass production possible.

If you spend $20,000 on a steel mold and then use that mold to create 400,000 parts, the cost per part would end up at 5 cents. There’s more to it than that, however, as the labor and material used will also have an impact on the total investment.

Since double-shot injection moulding is the most common multi-shot injection type, we will discuss this topic in further details below.

That is because 3K and more material or colour injection processes entail more detailed studies on the bonding of materials, geometry parts, and many other considerations.

Multi-shot moulding is a process that moulds two or more more materials onto each other, in a single injection moulding cycle.

When thinking about what material to use for your plastic injection project, it’s important to remember that the function of the product should determine the material used. Having an understanding of the options available and the prices associated with those materials will help you to make an informed decision.

These three materials are used so often because they are affordable and durable. The material used to create a product should be determined by the product itself, and what it will be used for. To read more about different injection molding materials and their features, check out our materials blog here.

First, the substrate is injected into its respective mould cavity, while the second shot over mould is injected into its own cavity over the substrate from the first half of the injection moulding cycle.

Alternatively, in cases where the substrate and over-mould plastic material are not chemically compatible, the substrate geometry has to incorporate mechanical bonding features such as through holes or other similar features.

It is important to note that such method is ideal for surfaces with maximum friction, i.e. first shot hard plastics with a second shot soft rubber designed to enhance grip non-slip surfaces for industrial hand-held devices and infant products.

Do you need design-for-manufacturing (DFM) assistance? Or, are you ready for production? We have a full suite of services to offer and a lifetime mold guarantee.

I am looking to mold a cat sculpture for our local Humane Society. I have the model, formerly done in a 6 piece mold using fiberglass. I need about 50 cats, they stand 22″ floor to top of head, 30″ to top of tail, 6″ wide sideways and 16″ chest to rear. I also could use many more if the ideas goes to other HS.locations. The fiberglass ones were pure white, solid, but now I am thinking of technocats, clear plastic or solid white, hollow so that artists can utilize some tech including audio.

For a double-shot plastic injection moulding to work, the substrate and over-mould plastic material has to be chemically compatible in order  for them to form a solid bond.

Next, the mould opens and the moving half or the core side of the mould is rotated 180 degrees and closed for the second half of the injection moulding cycle.

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