How Does 3D Printing Work? From Part Design to Production

Manufacturing teams often ask, “How does 3D printing work?” when they are evaluating ways to develop, test, or manufacture plastic components. In modern industrial settings, 3D printing is no longer limited to conceptual models or hobby applications. Instead, it can support part design, engineering validation, manufacturing aids, fixtures, and functional plastic components used by manufacturers.

At Elrex Manufacturers, we use FDM 3D printing as part of our plastic manufacturing capabilities to help manufacturers accelerate product development, improve design communication, and support practical production needs without relying on one manufacturing method alone.

This article explains how 3D printing works, how FDM is used in manufacturing, and how it compares with other 3D printing methods.

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How 3D Printing is Used in Manufacturing

Manufacturing companies increasingly use additive manufacturing to support engineering, testing, and production efficiency. Rather than replacing traditional manufacturing entirely, industrial 3D printing is often used alongside CNC machining, fabrication, and assembly processes.

What 3D Printing Means in a Manufacturing Context

In industrial manufacturing, 3D printing refers to the process of creating plastic components layer by layer from a digital CAD model. Production teams typically begin with engineering files such as STEP, IGES, STL, DXF or DWG formats before preparing the geometry for printing.

Unlike consumer-grade systems, industrial additive manufacturing equipment is designed to support repeatability, dimensional consistency, and production-quality output. This is particularly important in industries such as telecom, defence, aerospace, automotive, and medical-device manufacturing, where engineered plastic components must meet strict tolerances and documentation standards.

Why 3D Printing Matters in Production

Manufacturers continue to invest in additive manufacturing because it supports faster design iteration and improved production flexibility. This is one reason why 3D printers are important within modern supply chains.

Traditional tooling can require extended lead times before production begins. Additive manufacturing allows engineering teams to validate geometry, fitment, and assembly requirements before committing to expensive tooling investments.

For repeat manufacturing programmes, 3D printing also supports rapid manufacturing during pre-production stages. This helps organizations maintain production momentum while permanent tooling is finalized.

Industrial additive manufacturing additionally supports:

• Reduced product development timelines
• Faster design revisions
• Improved communication between engineering and production teams
• Lower material waste compared to subtractive methods
• Faster prototype evaluation before scaled manufacturing

Common Types of 3D Printing Used in Manufacturing

Several types of 3D printing are used in manufacturing. Elrex Manufacturers specializes in FDM 3D printing, but it can be helpful to understand how FDM technology differs from other common additive manufacturing technologies.

Fused Deposition Modelling (FDM)

Fused deposition modelling, commonly known as FDM, is one of the most widely recognized additive manufacturing methods used in industrial plastic production. This process works by heating thermoplastic filament and depositing material layer by layer according to the CAD design.

FDM is commonly used for:

• Functional prototypes
• Production fixtures
• Manufacturing jigs
• Engineering validation parts
• Bridge production components

FDM also allows design changes to be made efficiently. If a part needs to be adjusted for fit, clearance, mounting, or assembly, the digital file can be revised before the next part is printed. This makes FDM especially valuable when manufacturers need practical plastic parts that can be reviewed, tested, and improved before moving further into production.

How Elrex Uses FDM 3D Printing for Manufacturers

Elrex Manufacturers works with manufacturers that require plastic parts for equipment, assemblies, product development, and industrial applications. Our FDM 3D printing service gives manufacturers a practical way to move from a digital part design to a physical plastic component.

We support manufacturers by reviewing the part design, selecting an appropriate thermoplastic material, preparing the file for printing, producing the component, and completing any required finishing or inspection steps.

Because Elrex also works with other plastic transformation methods, we can help manufacturers evaluate whether FDM is the right process for the part or whether another manufacturing method may be more appropriate. This is important because 3D printing is useful, but it is not always the best answer for every plastic component.

Selective Laser Sintering SLS

Selective laser sintering SLS uses a laser to fuse powdered thermoplastic materials into finished components. Unlike FDM, SLS does not require support structures during printing, which allows for more complex geometries.

Selective laser sintering SLS is often used for:

• Durable functional prototypes
• Complex engineered parts
• Lightweight assemblies
• Production-ready plastic components

Because SLS parts often demonstrate strong mechanical properties and design flexibility, this process is frequently used in aerospace, industrial equipment, and automotive applications.

The ability to manufacture complex geometries without extensive tooling also supports rapid manufacturing objectives during product development cycles.

Stereolithography in Manufacturing

Stereolithography uses a laser to cure liquid photopolymer resin layer by layer. This process is known for producing components with smooth surface finishes and high dimensional accuracy.

In manufacturing environments, stereolithography is commonly selected for:

• Detailed prototype models
• Fit and form testing
• Cosmetic validation parts
• Engineering presentation samples

While stereolithography offers excellent surface quality, material performance may differ from production thermoplastics. As a result, manufacturers often use this process primarily for validation and engineering review rather than long-term production applications.

When discussing the types of 3D printing used in industrial manufacturing, FDM, SLS, and stereolithography remain among the most widely adopted technologies.

3D Printing Materials Used in Plastic Parts Manufacturing

Material selection is one of the most important factors in additive manufacturing. Different applications require different levels of impact resistance, thermal stability, flexibility, and structural performance.

Modern 3D printing materials are engineered to support industrial performance requirements across multiple sectors.

ABS Filament in Production

Acrylonitrile butadiene styrene (ABS) remains one of the most common thermoplastics used in additive manufacturing. ABS offers a balance of durability, machinability, and impact resistance that makes it suitable for many industrial applications.

ABS components are frequently used for:

• Enclosures
• Protective covers
• Manufacturing fixtures
• Structural prototype components
• Automotive and industrial assemblies

Because ABS can also be machined and post-processed effectively, it remains a practical option for manufacturers requiring functional prototypes and bridge production support.

Carbon Fibre Filaments in 3D Printing

Carbon fibre filaments combine thermoplastics with carbon fibre reinforcement to improve stiffness and strength characteristics.

These materials are commonly selected for:

• Lightweight structural parts
• High-strength fixtures
• Functional production tooling
• Engineering validation assemblies

Industrial manufacturers often use carbon fibre filaments when applications require improved rigidity while maintaining reduced weight compared to metal alternatives.

Material selection should always align with the intended production environment, mechanical requirements, and downstream manufacturing processes.

Advantages and Limitations of 3D Printing

3D printing offers several advantages for manufacturers, but its benefits and limitations vary depending on the technology, materials, part design, and application. Since Elrex specializes in FDM 3D printing, we help manufacturers evaluate whether this method is the right fit or if another plastic manufacturing method is more appropriate.

Advantages

One of the primary advantages of industrial 3D printing is production flexibility. Engineering teams can revise CAD files quickly without redesigning expensive tooling.

Additional benefits include:

• Faster prototype turnaround
• Reduced upfront tooling costs
• Improved design flexibility
• Faster engineering validation
• Reduced material waste
• Efficient production support during product development

For manufacturers evaluating the pros and cons of 3D printing, additive manufacturing is especially useful when supporting engineering changes, design validation, functional testing, and practical production support.

As a custom plastic parts manufacturer, Elrex Manufacturers uses FDM 3D printing as part of broader plastic manufacturing capabilities that also include machining, fabrication, assembly, and quality-controlled manufacturing support.

Limitations

Despite its advantages, 3D printing also has limitations that manufacturers must evaluate carefully.

Production speed may be slower than traditional high-volume manufacturing once tooling is established. Material options may also differ from injection moulding-grade thermoplastics depending on the process.

Additional considerations include:

• Surface finishing requirements
• Layer visibility on certain processes
• Material-specific performance limitations
• Equipment and process constraints
• Dimensional tolerances that vary by technology

Industrial additive manufacturing is most effective when integrated strategically into a broader production programme rather than treated as a replacement for all conventional manufacturing methods.

How 3D Printing Supports Prototyping and Pre-Production

Additive manufacturing plays an important role during engineering validation and production preparation.

Prototype Validation With 3D Printing

Prototype validation allows manufacturers to identify design concerns before committing to production tooling or scaled manufacturing.

Using 3D printing services, engineering teams can evaluate:

• Component fitment
• Assembly compatibility
• Structural performance
• Ergonomics
• Design revisions

This process helps reduce downstream production risk while supporting faster communication between engineering, procurement, and manufacturing departments.

In complex manufacturing programmes, rapid prototype validation can significantly reduce development delays and unnecessary tooling revisions.

Bridge Production With 3D Printing

Bridge production refers to temporary manufacturing support used between prototype approval and full production tooling readiness.

Industrial additive manufacturing can support bridge production by supplying:

• Pre-production assemblies
• Functional evaluation units
• Pilot-run components
• Production validation parts
• Temporary manufacturing support components

When evaluating how 3D printing works within a real manufacturing environment, the answer involves more than producing plastic parts layer by layer. For manufacturers, 3D printing can support part design, engineering validation, functional testing, fixtures, production aids, and practical manufacturing needs.

At Elrex Manufacturers, we have integrated FDM 3D printing into our plastic manufacturing capabilities to help customers move from a digital design to functional plastic components.

As a Canadian manufacturer of custom plastic parts, we work with a variety of plastic transformation methods. We can therefore help you determine whether FDM is the right process for your project or if another approach might be better suited to the material, tolerances, finish, geometry, or end-use requirements.

If your manufacturing team needs assistance with a plastic component, jig, prototype, or functional part, we can help review the design and recommend an appropriate plastic manufacturing approach. Contact Elrex Manufacturers to discuss long-term manufacturing requirements, engineering collaboration, and scalable production support.