National Molding

3 Elements That Determine The Cost Of Plastic Molding

Are you thinking about getting your product out in the market but you want to spend less to make it happen? To make this possible, you need to have a good deal of comprehension with the elements that affect the cost of plastic molding.

We have more than 50 years of experience in this industry and we would be very happy to help you in developing your products. To help get you started, here are the 3 considerations that ultimately determine the cost of producing plastic commodities.

Creative Composition and Construction.

The main factors that determine the price of plastic components are cycles and machine usage. Larger plastic parts need more load, pressure and machine rates as compared to smaller plastic parts.

Huge molds that use 500 tons of injection press, or less, would need more time to set up, and this can increase the cost of the plastic part. The size of the plastic part and its thickness, on the other hand, influences the cycle times. The bigger the product size and the thicker it is, the pricier it gets. Additional machine use and material use can also increase the cost of plastic parts.

Another element to consider is surface finishes; low-cosmetic finishes are the most affordable, medium to high-cosmetic finishes are costly because the product surface is polished or textured and the tooling marks are taken away, while high-quality finishes are the costliest because additional labor is utilized.

Before the manufacturing process starts, create a conversation with the plastic engineer about the design of your product and, if possible, equip them with CAD and 3D drawings, complete with all the details, dimensions and complexities of your intended product. By creating a manufacturing flow, a simulation of how your product design and how it will look during the process can be determined. To prevent unexpected costs for additional tooling, ask the plastic engineer about design manufacturability.

Raw Materials.

Plastic raw materials for quick release buckles, or other products, have a different price range. Resins like polystyrene, polyethylene and polypropylene are cheaper compared to liquid crystal polymer (LCP) or Polyetheretherketone (PEEK) because they have more complex properties. Aside from that, resins that require a higher temperature for melting need a harder plated mold steel or Rockwell hardness, and this is another factor that will increase the cost.


How big your product is and how complex its design determines the tooling cost. When you need huge parts, huge molds are required and they take more time to make than smaller ones. More cavities per toll can also raise the costs. Take for instance doubling cavitation. It can actually increase the tool cost at around 60% to 70%! In some instances, a rise in cavitation also produces more parts in an hour, decreasing the machine cost per product.

There is one exception. Molds with more cavities may need a bigger press size. This boosts the variable costs of space, set up and electricity. If the molding press cost is amortized by the press rate, the bigger press will be more costly. But in general, the savings we can get from more cavitation outweighs the rising press size cost.

The overall cost of using injection molding cavity depends highly on its application. Always take into consideration that product design and product application can influence the machine, tooling and cycles for each product part, all of which directly determines the cost of production.

If you want to know where to buy plastic buckles, get in touch with us at Tel: (305) 823-5440, Fax: (305) 557-1431 or Email: [email protected] today!

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