What Is An Injection Mold Used For?

What Is An Injection Mold Used For?

The success of the IM process relies on the proper design of the tooling utilized in the IM processes. The tooling used to manufacture parts via the IM process is referred to collectively as an Injection Mold. An injection mold is specially designed and manufactured to create the product being produced. All injection molds consist of two components; the Cavity, and Core, and together these components create a void where liquid plastic will be injected into and harden into a finished (new) plastic part.

A critical role of the design and manufacturing of the die and molds is to establish the dimensions, finish characteristics, and complexity of plastic products.

The Process of Producing Plastic Products by Injection Molding

There are four basic operational stages (or steps) to producing plastic products through the injection molding process:

1. Clamping: To keep the injection mold properly sealed, it must be tightly clamped to prevent leakage after performing the following three processes.
2. Injection: After the mold is properly clamped, new plastic material is injected into the mold cavity directly through an injection molding ram or screw machine and completely fills the cavity.
3. Cooling: Once the cavity has been filled with plastic material, the next stage is to allow the structure of that material to develop in order to retain its shape after the mold cavity has cooled down.
4. Ejecting: After completion of the previous stages, the mold should be fully cooled and should have cooled sufficiently to allow for the removal of the molded product without damaging either the mold or the molded product in order for it to be prepared for any secondary or finishing operations.

Since injection molding applications produce plastic products in a circular fashion, it is practical to use injection molding machines to produce the same plastic part multiple times (through production process), producing millions of parts efficiently.

The Many Uses of Injection Molding Plastics

Today, injection mold plastic processes can be seen throughout all industries and are among the most common methods of producing plastic products, making them one of the most versatile processes available. Injection Molding Plastics are widely used in many applications; some examples of these applications are:

• Injection molded components are widely used within the automotive industry to create interior and exterior automotive panels including engine covers, dashboards and other panel parts.
• Injection Molding is also used to manufacture medical equipment such as syringes, surgical instruments and diagnostic testing equipment.
• Consumers use injection molded plastic products to produce many items including food storage containers, toys and electronic product housing.
• Injection Molding has become standard in the Industrial sector to manufacture complex machined components, e.g., gears, housings used in high volume machines.

Benefits of Using Injection Molds for Plastic Products

There are several benefits to using Plastic Injection Molds, e.g.:

• Cost Savings: After the initial cost of producing a plastic injection mold, the cost of producing additional units decreases based upon the amount of production.
• Will produce complex products with high accuracy: With the advancements in plastic injection mold technology, it is easier to manufacture complex products.
• Produce consistent results: With high-quality plastic injection Mold Tooling, manufacturers have the ability to produce consistent results with the same quality every time.
• Ability to use multiple plastic types: Different types of plastics can be utilized such as thermoplastics, thermosets and elastomers.
• Fully Automated: By using fully automated plastic injection moulders, manufacturers can reduce their labour costs while increasing their production rates.

What is the Cost of a Plastic Injection Mold?

The cost of a plastic injection mold will vary widely; this is due to several variables, i.e., size, complexity and number of cavities within a particular mold, these will all affect the overall cost of an injection mold.

Injection molds can be quite expensive, depending upon the complexity of your design. Basic single cavity injection molds will cost somewhere in the area of $5,000-$15,000; while an injection mold with multiple cavities will generally cost over $100,000. When considering the initial investment that an injection mold requires, it is also important to think about the amount of money that you could save in the long run due to the high volume of production that can be achieved with injection molding. You may also be offered prototype injection molds manufactured at lower prices based upon the manufacturer you choose to work with, allowing you to produce lower volume production runs or conduct product testing.

What Type Of Injection Mold Design Should You Use?

The best injection mold design, for your project, is essential to its successful completion. As you choose which type of injection mold design is right for your plastic project, there are many factors that will go into that decision:

• Material Type: The type of material you choose must match the intended use of your product (i.e. whether it has to have strength, be able to withstand high temperature, or if it has to be flexible).
• Complexity: Complex injection mold designs typically require more complex molds to manufacture, which increases the overall cost of your mold; that complexity can also offer more possibilities than simpler designs.
• Individual vs Group Mold: By using multi-cavity injection molds you can produce more than one identical product per injection cycle, thereby increasing your production capacity.
• Supplier Experience: You should look for experienced suppliers of injection molds, as their experience level will result in higher quality injection molds and components.

Maintenance Of Injection Molding Products

If you want your injection molded products to provide reliable service over time you must ensure regular maintenance occurs - when producing large numbers of products daily at a high level of production volume. Using low-quality components within your injection molded product(s) (i.e. low-quality ejector pins, low-quality injection mold bases or low-quality coolant channels) will result in a poorly manufactured part that reflects poorly on the quality of your finished product.

Conclusion

Plastic injection molding has completely changed how products are manufactured and has been embraced by many different industries (automotive, healthcare, etc.) because it allows for accurate, timely and scalable manufacturing processes. If you would like to learn more about designing plastic injection molding products, purchasing Plastic Injection Ass'y Components, or wish to understand what costs are involved in designing/creating products using plastic injection molding while focusing on quality and customisation will generate terrific returns. Today, companies understand how their processes and products operate allowing them to be better equipped to meet the needs of customers while generating ideas and/or innovation within their industry.