Injection molding is a highly versatile and efficient manufacturing technology with high production rates.
By injecting molten material into a mold cavity, this process enables the creation of complex shapes and intricate details with remarkable precision. Additional benefits include consistent quality, design flexibility, and cost-effectiveness.
How injection molding works
First, a mold is prepared, usually made of steel or aluminum, to form the desired part shape. The mold consists of two halves - the cavity and the core - precisely machined to create the desired geometry.
Next, plastic pellets, typically made of thermoplastic materials, are melted and injected into the mold under high pressure. The molten plastic fills the cavity, taking the shape of the mold.
After cooling and solidification, the mold opens, and the finished part is removed for finishing.
Injection molding use cases
Various industries use injection molding extensively, as the technology offers a high-quality, cost-effective manufacturing solution.
This technology produces components such as dashboards, interior trim, and exterior body parts in the automotive industry. In consumer electronics, injection molding manufactures smartphones, electronic housings, and more. Other sectors, such as aerospace, packaging, and consumer goods, also leverage this technology to create custom parts and consumer products.
Injection molding by the numbers
Max Build Size: Up to several meters in the longest dimension
Minimum Wall Thickness: max 0.05 mm (strongly dependent on material and boundary conditions)
Dimensional Accuracy: +- 0.1 % (minimum 0.1 mm)
Lead Times: Starting at 21 days
Source industrial-grade injection molding parts
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Available injection molding finishes
Pad printing applies detailed designs, logos, or markings on the surface of injection-molded parts. This process is done by transferring ink onto the part using a specially designed printing pad.
This process involves gradually smoothing the surface using abrasive materials or compounds, resulting in a glossy finish that highlights the fine details of the printed object.
Surface texturing techniques create specific patterns or textures on the surface of injection-molded parts, enhancing their functionality, aesthetics, or grip.
Painting offers a wide range of color options. Furthermore, different painting techniques and high-quality coatings can achieve various effects, such as glossy, matte, metallic, or textured finishes.
Popular injection molding materials
Injection molding offers a wide range of epoxyresins designed to be equivalents to the thermoplastic materials used in other manufacturing technologies. Some of the most popular options include:
ABS, or acrylonitrile butadiene styrene, combines strength and durability with low weight and a high load capacity. The material provides a good compromise between mechanical properties, cost, and accuracy.
Thanks to its versatility and affordable price, ABS is used widely used across industries.
Elastomers (such as TPU)
TPU and other elastomers offer high elasticity or shock absorption.
These materials are often used for energy-absorbing parts produced for safety – such as helmets.
PA, or polyamide, provides excellent mechanical properties. Its high ductility and impact strength make it interesting for functional parts in various industries such as automotive.
Typical usage would be interior parts for automotive, functional prototypes, and in the medical industry.
Polycarbonate (PC) combines good mechanical properties such as impact resistance, strength, rigidity, and hardness. It can also withstand high temperatures and offers high dimensional stability.
PC is typically used for cases of any kind.
Polypropylene (PP) offers high strength and toughness combined with a light weight. This material also has low moisture absorption.
PP is a relatively inexpensive material often used in everything from electronic components to everyday household goods, such as storage containers.
Looking for any specific materials?
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