How vapor smoothing improves the quality of 3D-printed parts

How vapor smoothing improves the quality of 3D-printed parts

Vapor Smoothing in 3D Printing: Optimizing the Performance of Printed Parts

In the world of 3D printing, the quest for methods to enhance the performance and aesthetic appearance of produced parts is a constant endeavor.

Among the various post-production techniques available, vapor smoothing stands out for its effectiveness in imparting new properties and significant improvements to printed parts.

How does the vapor smoothing process work in SLS 3D printing?

The process takes place within a processing chamber, where a series of chemical agents, selected based on the material of the part, act on the 3D-printed surfaces, making them uniform and smooth to the touch.

This system can simultaneously treat hundreds of parts, ensuring a consistent treatment for all products within the working chamber.

The potential

Vapor smoothing is a post-production process primarily applied to 3D-printed parts to enhance their surface finish, strength, and aesthetic appearance.

This technique offers several advantages, including:

  • Surface Finish Improvement: Surfaces of 3D-printed parts can exhibit irregularities and porosity due to the 3D printing process. Vapor smoothing acts to eliminate these imperfections, providing surfaces with a smooth and uniform finish.
  • Glossy Surfaces: One of the most appreciated features of chemical smoothing is its ability to give parts a glossy and shiny finish. This not only enhances the aesthetic appearance of the parts but also makes them more appealing for applications where appearance matters.
  • Porosity Removal: Surface porosities can compromise the strength and durability of 3D-printed parts. Vapor smoothing can reduce or completely eliminate these porosities, thereby increasing the strength and lifespan of the parts.
  • Improved Strength: Through the application of specific chemical agents, chemical smoothing can enhance the resistance of printed parts to liquids, chemicals, and mechanical stress. This makes them more suitable for a wide range of industrial and commercial applications.
  • Ease of Cleaning and Maintenance: The smooth and uniform surfaces obtained through vapor smoothing simplify the cleaning and maintenance operations of printed parts, reducing the time and costs associated with these activities.
il tpu sls si distingue per la sua morbidezza, risultando adatto alle stampanti SLS e combinando un'elevata capacità di allungamento a rottura con una straordinaria resistenza alla lacerazione.

BEFORE

 

al TPU si possono applicare molteplici finiture applicabili alle parti sinterizzate, come verniciatura, colorazione, lisciatura chimica e diversi tipi di coating.

AFTER

 

Applications and Advantages

 

Vapor smoothing finds application in a variety of sectors, including aerospace, automotive, medical, and consumer industries. Parts printed through 3D printing technology can undergo this process to achieve optimal performance and a high-quality appearance.

This treatment represents a crucial step in the post-production process of 3D-printed parts. Thanks to its numerous advantages, this technique enables the production of parts with optimal performance, impeccable surface finishes, and increased durability.

For anyone involved in the production of 3D-printed parts, chemical smoothing emerges as an option to consider in ensuring the success of their projects and meeting the needs of clients.

TPU: A Flexible Material for the Industry

TPU: A Flexible Material for the Industry

TPU, 3D SLS material,  meets any industrial applications

TPU (Thermoplastic Polyurethane) is a fundamental element in industrial production with additive technologies, especially in the realm of 3D SLS printing applications.

At Prosilas, we take pride in working with BASF Forward AM‘s TPU88A, providing solutions in both white and black colors, and opening the doors to a wide range of industrial applications.

Characteristics of TPU 88A

TPU is a material that emulates rubber and is widely appreciated for its flexibility, strength, and elasticity.

Its workability allows the creation of parts with exceptional mechanical properties, making it ideal not only for prototypes but also for mass production.

Productive Collaboration with BASF Forward AM

The collaboration between Prosilas and BASF Forward AM has yielded significant results, such as the Skeleton Sole for Philipp Plein, the Lube Volley case study, and the validation of lattice structures printed in Ultrasint® TPU88A for the Ultrasim® software.

These projects exemplify a commitment to innovation and experimentation in the industrial field.

Properties and Industrial Applications of TPU

 

l poliuretano termoplastico (TPU) non è solo ideale per prototipi, ma si presta anche perfettamente per la produzione in serie con le tecnologie SLS.
  • Automotive

TPU excels in strength and rigidity, making it ideal for applications requiring a robust and durable structure. In the automotive industry, it is used for components such as gaskets, tubes, and mountings, where strength and integrity are essential to ensure optimal long-term performance.

  • Industry

Its chemical resistance makes it valuable in environments exposed to aggressive chemical agents. In the industrial sector, TPU is employed in gaskets, mountings, and machinery equipment, where resistance to chemical agents is crucial for the durability and efficiency of the equipment.

TPU maintains its performance over time, ensuring stability and reliability even under prolonged usage conditions. This characteristic makes it particularly suitable for industrial applications that demand long-term durability, such as gaskets and seals for industrial machinery.

  • Medical

3D printing with TPU allows for parts with exceptional detail resolution, ensuring precision in shapes and contours. This property is crucial in sectors like the medical industry, where precision is essential for prototyping and components for medical devices such as corrective insoles and prosthetic coverings.

The biocompatibility of TPU makes it safe for contact with the skin, making it ideal for medical applications like prototypes for medical devices and components for final devices, where safety and compatibility with the human body are crucial.

  • Sportswear

Due to its high impact resistance, TPU is widely used in protective devices such as cranial remodeling helmets and equipment for the sports industry, ensuring reliable and durable protection in potential impact situations.

Post-process treatments

The versatility of TPU also extends to the various finishes applicable to 3D-printed parts.

Among these, painting, coloring, vapor smoothing, and various types of coatings. From untreated finishing to steam chemical smoothing, TPU adapts to the aesthetic and functional needs of industrial applications.

Design tolerances in 3D printing

Design tolerances in 3D printing

Tips & Tricks: What are design tolerances?

Exploring design tolerances in SLS 3D printing

Design Tolerances

Let’s continue our journey into the world of tolerances, this time delving into the concept of design tolerances.

What are they, and how should they be managed? In this exploration, we will unveil the crucial role of tolerances in engineering, design, and the production of mechanical components.”

Why using tolerances?

The use of tolerances is a common practice in various industries, and their role becomes particularly evident in ensuring the flawless coupling of components.

But what exactly are design tolerances?

When designing or manufacturing a component, achieving precise dimensions in every unit produced can be a challenge.

Materials, subject to variations in temperature and other factors, can expand or contract. This is where tolerances come into play, defining the limits within which a specific dimension can vary without compromising the functionality of the part.

Prosilas Contribution

At Prosilas, our expertise in manufacturing processes, tolerances, and materials allows us to provide valuable input during the design phase.

Our targeted advice supports engineers and designers in achieving optimal results, ensuring the proper functioning of the parts

Managing Tolerances in 3D Printing

When dealing with the 3D printing of two parts intended to mate, recommended tolerances typically range around one-tenth to two-tenths of a millimeter. These targeted specifications ensure precise mating/fitting, eliminating potential issues of unwanted play.

If the component involves movable sections or joints and requires integrated printing, suggested tolerances increase to around three-tenths of a millimeter.

This distance takes into account the presence of unsintered powder between surfaces and the heat generated by the machine, preventing unintended fusions between moving parts.

Rapid prototyping and 3d printing

Rapid prototyping and 3d printing

The first physical output of a project

Rapid prototyping constitutes the initial phase of the physical production of a project, leveraging advanced technologies such as 3D printing.

Prosilas stands out as a leader in the field of rapid prototyping and additive manufacturing for over twenty years.

Prosilas stampe tridimensionali in carbonmide per prototipi rapidi

Photo courtesy : Bimota 

Photo courtesy : Armotia

Prototype: Definition and Utility

A prototype is the physical realization of an idea or project, an initial model created to evaluate both the aesthetic and functional aspects of an application.

What is Rapid Prototyping?

Rapid prototyping is the process of quickly creating a physical model of an idea or project.

This model, called a prototype, provides a tangible and visual representation of the application in the development phase. 3D printing has become a key technology for rapid prototyping due to its ability to rapidly translate digital designs into physical objects.

The primary purpose is to expedite the development process, enabling a comprehensive assessment of the performance and form of the product.

In Which Cases to Use Rapid Prototyping?

It is particularly useful in the early stages of designing and developing new products.

It is ideal when there is a need to quickly assess aesthetic aspects, optimize geometries, improve production cycles, and evaluate functional aspects.

Furthermore, it is valuable when exploring different iterations of a design without having to invest in expensive molds.

Advantages

  • Reduction of Development and Production Times: 3D printing allows for the rapid translation of designs into physical prototypes, significantly reducing development times.
  • Cost Reduction: By eliminating the need for expensive molds, rapid prototyping with 3D printing helps contain costs in the design and development phase.
  • Improvement of Product Quality: The ability to assess aesthetic and functional aspects in an early phase enables continuous improvements to the final product’s quality.
  • Production Evaluation: With the initial step of prototyping, subsequent steps for mass production can be evaluated, allowing assessments of timelines and costs.

3D Printing Technologies for Rapid Prototyping:

There are various 3D printing technologies suitable for this service.

Among these, SLS (Selective Laser Sintering) and SLA (Stereolithography) are often used for creating prototypes with precise details.

Other approaches, such as using filaments or metal powders, offer different options based on the project’s requirements.

We provide our technological offerings based on project needs and assist the client in choosing the best solution.

Photo courtesy : Bimota 

Case History Bimota

Bimota utilizes rapid prototyping in collaboration with Prosilas to expedite the development of its new motorcycle models.

Thanks to 3D printing, the design and testing process has become more efficient, reducing the time required to transition from the idea to the prototype from approximately 12 to 4 months.

Dimensional Tolerances

Dimensional Tolerances

Tips & Tricks: What are Dimensional Tolerances?

Dimensional Tolerance in SLS 3D Printing: Management and Control by Prosilas

 

 

Dimensional Tolerances

3D printing has revolutionized the way products and components are manufactured, offering unprecedented flexibility and customization.

Even in this innovative technology, dimensional precision is a crucial aspect, and Selective Laser Sintering (SLS) stands out for its ability to produce parts with remarkable precision.

Dimensional tolerance refers to the possible deviation within which the printed part can vary from the original geometry.

Specifically, we are talking about +/- 0.3 millimeters for parts up to 100mm and +/- 0.3% for larger dimensions.

Photo courtesy Protototal Industries

Thermal Expansion

This difference between the nominal dimensions in the 3D file and the printed part is due to thermal expansion, an intrinsic phenomenon in SLS technology.

This printing methodology involves heating the materials to their melting temperature, such as 170°C in the case of polyamide.

During the subsequent cooling process, the part transitions from the melting temperature to room temperature, contracting by approximately 3%.

Our Approach

The parts are initially processed with larger dimensions, using scaling factors specific to each machine and material.

The determination of these factors occurs through the periodic production of samples, a practice that allows monitoring and maintaining control over the dimensional tolerances declared to customers

L'approccio di Prosilas consiste nel produrre parti inizialmente con dimensioni maggiori, utilizzando fattori di scalatura specifici per ciascuna macchina e materiale.

To achieve the highest level of precision, we incorporate this element during the job preparation stage.

Quality Standards

Thermal shrinkage is not entirely constant; hence, an average of the results is calculated and applied.  This phenomenon can vary depending on various parameters, such as cooling times, part orientation, shape, and thickness.

To ensure maximum precision, we integrate this aspect during the job preparation phase. Geometries are carefully modified in the software, taking into account the inevitable dimensional variations that occur during material cooling.

This proactive practice demonstrates our commitment to providing 3D-printed components that strictly meet the quality standards required by our customers.

Per garantire  il massimo della precisione, integriamo questo aspetto durante la fase di preparazione dei job.

The software undergoes meticulous modifications to the geometries, considering the inevitable dimensional variations occurring as the material cools.

What are the NDAs?

What are the NDAs?

NDA: The Value of Confidentiality Agreements at the Heart of a Trust Relationship Between Service Providers and Manufacturing Companies

Confidentiality Agreements, commonly known as NDAs (Non-Disclosure Agreements), are legally significant in the manufacturing industry as they are designed to protect confidential and sensitive information.

NDA contracts are widely used in both the industrial and technological sectors, as well as in research and development, with the explicit goal of preventing the disclosure of sensitive data to third parties without the explicit consent of the information owner.

Managing Industrial Secrets at Prosilas

Prosilas works closely with companies, contributing to the development of projects intended to launch in the market within the next three years. In this context, safeguarding information plays a critical role.

Therefore, we provide support for both prototype component production and mass production, utilizing a comprehensive range of technologies, ranging from complex additive manufacturing and 3D printing methodologies to more traditional injection molding techniques.

Within the Prototal Industries group, we have privileged access to diverse technological resources, occasionally collaborating with external suppliers. This is precisely why it is crucial to extend confidentiality throughout the production chain when exchanging information with colleagues and partners.

 

Cybersecurity: Protecting Information Online

Information communication occurs through digital platforms or by transmitting files via email, emphasizing the relevance of cybersecurity issues.

In this regard, Prosilas consistently invests in enhancing its cybersecurity systems, ensuring adequate monitoring and protection of exchanged information.

Our staff also undergoes continuous specialized training to maintain high-level expertise in this field.

Dedicated Spaces: Protecting “Offline” Projects

Confidentiality is a fundamental pillar of our operations and is ensured through the use of NDAs. However, there are circumstances where a higher degree of secrecy is required. We have dedicated specific spaces within our laboratories, providing access exclusively to authorized personnel. Information security is an indisputable priority to preserve the trust and respect of our clients.