Take a look around your kitchen or laundry room and you’ll probably see dozens of plastic components without giving them much thought.
From the controls on your washing machine to components inside your refrigerator, injection molded plastic parts are used throughout modern home appliances. Injection molding allows manufacturers to produce durable, repeatable components in complex shapes while maintaining consistent quality across high production volumes.
Here are seven appliance components you may not realize are commonly made using plastic injection molding.
1. Knobs and Control Components
The knobs and controls on ovens, washers, dryers, and other appliances are often injection molded.
These parts may look simple, but they need to fit correctly, withstand repeated use, and maintain a consistent appearance from one unit to the next.
Injection molding makes it possible to produce thousands of these components with the same dimensions, shape, and finish.
2. Internal Brackets and Mounting Components
Not every important appliance part is visible.
Plastic brackets, supports, clips, and mounting components can be found throughout many household appliances. These parts help hold other components securely in place while keeping the overall product lightweight.
Depending on the application, materials can also be selected for added strength, flexibility, or heat resistance.
3. Housings and Covers
Plastic housings are used to protect internal components while giving appliances a clean, finished appearance.
You may find molded housings and covers around controls, electronics, motors, switches, and other components.
Materials such as ABS are often considered for housings because they can provide a combination of durability, impact resistance, and a quality surface finish.
4. Handles and Grips
Think about how often you open your refrigerator, dishwasher, microwave, or other appliances.
Handles and grips need to withstand repeated everyday use while remaining comfortable and durable. Injection molding allows manufacturers to create consistent shapes and features that would be difficult or expensive to produce using other manufacturing methods.
5. Clips, Fasteners and Retainers
Some of the smallest plastic parts can have an important job.
Injection molded clips, fasteners, and retainers can be used to secure wiring, panels, hoses, and other components inside an appliance.
For manufacturers producing appliances at scale, even a small component needs to be manufactured consistently so it fits and functions correctly during assembly.
6. Trays, Bins and Organizers
Refrigerator drawers, storage bins, dishwasher components, and other organizational features can also rely on injection molded plastic.
Depending on the application, polypropylene (PP) may be considered because of properties such as its low weight, chemical resistance, and flexibility.
The right material ultimately depends on how and where the component will be used.
7. Buttons, Switch Components and Bezels
Those small buttons and trim pieces surrounding appliance controls are another common application for injection molding.
Because these parts are often highly visible, both function and appearance matter.
Injection molding helps manufacturers maintain consistent dimensions, surface finishes, and appearance across large production runs.
Why Is Injection Molding Used for Appliance Parts?
Appliance manufacturers need components that can be produced efficiently without sacrificing consistency.
Plastic injection molding is well suited for appliance manufacturing because it can provide:
- Consistent parts across high production volumes
- Complex shapes and detailed features
- A wide range of material options
- Repeatable dimensions
- Durable, lightweight components
- Reduced secondary processing for certain designs
It can also allow multiple features to be incorporated into a single molded component, potentially reducing the number of individual parts required for assembly.
Choosing the Right Plastic for Appliance Components
There isn’t one plastic that’s right for every appliance part.
Material selection depends on factors such as strength, flexibility, appearance, temperature exposure, chemical resistance, and how the finished component will be used.
ABS and polypropylene are two materials commonly considered for molded components.
ABS can be a good choice when a component requires durability, impact resistance, and an attractive surface finish.
Polypropylene can be useful for applications requiring flexibility, chemical resistance, low weight, or features such as living hinges.
Working with an experienced injection molding manufacturer can help determine which material and molding process best fit the requirements of a particular part.
From Simple Clips to Complex Components
Plastic parts may not be the first thing you notice when looking at a home appliance, but they’re an important part of how many products are built.
From small clips and retainers to housings, handles, and structural components, custom plastic injection molding gives appliance manufacturers the ability to produce reliable components at scale.
At Marne Plastics, our injection molding capabilities support manufacturers across automotive, packaging, consumer goods, appliances, electronics, tools, and other industrial applications.
With injection molding machines ranging from 100 to 550 tons, along with tool build management, assembly, secondary operations, and quality support, we can help take plastic components from tooling through production.
Whether you’re sourcing a new appliance component or looking for a U.S. manufacturing partner for an existing part, our focus is simple: consistent parts, reliable production, and responsive customer care.
Frequently Asked Questions
What appliance parts can be injection molded?
Injection molding can be used to manufacture appliance components such as housings, covers, knobs, handles, brackets, clips, retainers, trays, buttons, bezels, and other custom plastic parts.
What plastics are commonly used for appliance components?
The material depends on the application. ABS and polypropylene (PP) are two commonly used thermoplastics, while other engineered resins may be selected when a component requires specific strength, temperature, chemical, or performance characteristics.
Why do appliance manufacturers use injection molding?
Injection molding allows manufacturers to produce complex plastic components repeatedly and efficiently at production volumes. It also provides flexibility in part design, material selection, surface finish, and functionality.
Can an injection molding company manufacture custom appliance parts?
Yes. A custom injection molding manufacturer can produce components based on a customer’s part design, specifications, tooling, material requirements, and expected production volume.