Here's your guide on choosing the proper material for injection molding.
Here’s your guide on choosing the proper material for injection molding.
There are lots of material for injection molding such as plastics available on the market right now. As a result, material selection for injection molding can be a difficult decision. Many properties must be considered while selecting the best materials for injection molding such as plastics. For example, the top attributes to check are strength, flexibility, weight, and cost. To help you, this article will discuss the common materials for injection molding that engineers can use and the factors to consider before choosing a suitable material.
The following are the top five most commonly used plastic resins in injection molding :
The cost of materials is the most significant factor to consider when deciding. However, while cost should be considered, it should not take precedence over other factors. Nylon is the most expensive of the common material for injection molding, while polyethylene is the least expensive.
When selecting material for injection molding, hardness is an essential factor to consider. Every plastic material is rated using Albert Shore’s hardness scale. Plastics are classified into types A and D using Albert’s durometer scale.
Soft plastics are classified as Type A, whereas hard plastics are classified as Type D. Each scale goes from zero to one hundred. The hardness of a material is crucial because it reflects its environmental compatibility and abrasion resistance.
Start with a detailed understanding of the product’s intended use.
There is a misunderstanding about the relationship between material hardness and flexibility. The general consensus is that soft plastic materials should be flexible, while hard plastics should be rigid. However, flexible and soft plastics are available. They can be both rigid and pliable. You can choose the material flexibility according to your requirements.
When selecting a material, you should also examine the presence of additional chemical elements. For example, if a plastic material includes Bisphenol-A , it’s not suitable for use in the food industry. Transparency, color, and the ability to mix components should also be considered.
All materials have their own qualities , so it’s critical to consider the overall defining characteristics of each material category you choose. Keep in mind that if you believe the material lacks some aspects, you can always fine-tune it with additives and fillers to get the properties just right.
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