Frequently asked questions

Yes, before proceeding with production, our professional technical team conducts a thorough analysis to validate specific aspects such as threads, finishes, and other critical elements. If any optimizations are necessary, we will provide you with proposals to ensure the best possible outcome for your project.

While our quality control is rigorous, if you happen to receive parts with issues, don’t worry. You’ll have a dedicated project manager you can reach out to for help. They’ll work quickly and efficiently to find a satisfying solution to any problems you encounter with the parts. Your satisfaction is our priority.

Our clientele spans across diverse sectors, including aeronautics, medical, electronics, and automobiles. We possess the capability to manufacture components for various applications, ranging from same-day production of satellite parts to creating intricate pieces for high-fashion cosmetic devices.

That’s a great question! At Protolis, we offer two significant advantages compared to other players in our industry.

Firstly, we pride ourselves on providing one of the widest ranges of services available. This includes a diverse selection of production methods (7 in total), a vast array of raw materials (over 1000 options), and an extensive range of finishing techniques. T

Secondly, our commitment to your project’s manufacturing process sets us apart. Despite being a digital platform, we prioritize offering exceptional customer service at every stage. We engage in direct communication, provide valuable advice, and engage in technical discussions to ensure that you receive the exact part you need. We excel in producing final assembled products that seamlessly integrate various technologies, materials, and finishes.

Protolis is a French company that provides rapid prototyping services and high-quality finishes for manufacturing parts. We have a factory located in Zhejiang, China, as well as a facility in Loir-et-cher in France. This dual presence allows Protolis to serve a global clientele efficiently.

Protolis specializes in providing rapid prototyping services and producing small series of plastic and metal parts, with a production capacity of up to 200 units. Our core services involve creating prototypes that allow clients to validate designs, conduct assembly testing, and prepare for product launches.
With years of experience in the field of rapid prototyping services, Protolis focuses on delivering plastic and metal rapid prototypes that excel in both technical functionality and visual aesthetics. Our mission is to offer the highest quality service and products in the plastic and metal rapid prototyping industry.

Protolis offers a variety of services, including 3D printing, CNC machining, urethane or vaacum casting, injection molding, extrusion, compression molding, and sheet metal fabrication. We provide these services to help clients with their prototyping and small-scale production needs.

When selecting the optimal manufacturing method, the primary factor to consider is quantity. For projects requiring fewer than five parts, CNC machining or 3D printing are cost-effective choices. Vacuum casting becomes economically favorable for quantities between five and 100 parts. However, if your project demands quantities exceeding 100 parts, plastic injection molding is typically the preferred option due to its scalability and cost-efficiency. Keep in mind that material and precision requirements can occasionally influence the choice, so providing detailed project information enables us to recommend the most suitable production method for your specific needs.

When it comes to rapid prototyping and low-volume manufacturing of metal parts, you have two primary options: 3D printing and CNC machining. The choice between these two methods depends largely on the specific shape and intricacy of the part you need. While 3D printing has gained popularity, CNC machining remains the preferred choice for metal parts due to its versatility in material selection, surface treatment capabilities, finishing options, and cost-effectiveness, especially for common part geometries. Therefore, our advice is to design and produce your part using CNC machining.

If you have any questions or need further guidance on the best approach for your specific needs, please don’t hesitate to reach out to us.

Rapid prototyping is commonly recognized as the rapid creation of prototypes or initial product samples for testing and validation, with the aim of evaluating design, functionality, and feasibility before mass production. In contrast, small series production involves manufacturing a limited quantity of identical or similar parts. This phase typically follows the prototyping stage and serves specific purposes such as market testing, fulfilling initial orders, or catering to specialized applications.

However, it’s important to note that the terminology can vary based on industry and context. In certain industries, small series production may be considered a form of rapid prototyping, as they require prototypes in limited quantities to conduct testing before initiating full-scale production.

The distinction between small series and mass production is primarily determined by the quantity of parts being produced. However, the specific threshold can vary depending on different perspectives and industries. Quantity, being a quantitative measure, can be subjective based on context.
In certain industries, even a quantity of 100 parts may be considered mass production. For example, in the aviation industry, 100 units can be considered a substantial production. However, in the automotive industry, 100 units would be considered a small series. This variation in perception can be confusing.
To provide some clarity, we generally define small series as starting after a few dozen units. This helps differentiate it from mass production, which typically involves much larger quantities.

Both are used for the production of plastic parts, but one involves compression molding in a mold, while the other involves injection molding into a mold. In terms of material, compression molding is primarily associated with thermoset polymers, elastomers, and rubber compounds. On the other hand, injection molding primarily deals with thermoplastics.

Our CNC machines are capable of producing the largest plastic parts. For single-piece production, we can manufacture parts up to 1800 mm in size. However, with certain adhesive-friendly materials like ABS, we may be able to exceed this limit. The main constraint then becomes the weight and transportation of the part, rather than the manufacturing capability.

We provide access to a wide range of material options for each production method. While we cannot display the entire list of available materials on our website, you can find a comprehensive list of grades for each method on the raw material page. If you require a specific grade that is not listed, we encourage you to reach out to us directly, and we will gladly assist you in finding the material you need.

In general, the financial viability of our technologies is typically favorable for quantities up to 200 copies. However, it is important to note that this may vary depending on the specific geometry of the parts.

The formats we can use are IGS, STP, and X_T.

Typically, we do not provide 3D design services from scratch, but this can vary depending on the specific situation. If you require a complete 3D design, we can refer you to one of our trusted design partner agencies. However, for minor modifications, we are more than happy to assist you. Once the modifications are made, we will send you the file for your confirmation.

We provide the general tolerance that we can achieve for each process on the page dedicated to each production method. During the quotation process, we carefully review your 2D drawing and assess if there are any tolerance requirements that we may not be able to meet. In such cases, we provide feedback and guidance to ensure alignment between your expectations and our manufacturing capabilities.

In our facility, we have a comprehensive range of in-house technologies, including 3D printing, CNC machining, vacuum casting, and injection molding.

In addition to our in-house capabilities, we have also forged strong partnerships to provide access to other technologies such as extrusion and compression molding. This allows us to cater to a broader range of requirements and ensure that we can meet diverse manufacturing demands effectively.

In general, the purpose of a prototype is for functional testing and to validate, communicate, and iterate on an idea, product, or system, with the ultimate goal of improving the final outcome and reducing the risks associated with development. Prototyping is a fundamental step in the design and development process in many industries.

The best method to produce aluminum prototypes largely depends on the specifics of the project, such as the design complexity, required tolerances, purpose of the prototype (e.g., functional testing vs. visual representation), production volume, and budget. Here are some commonly used methods for creating aluminum prototypes, along with considerations for each:

• CNC machining
  – Pros: High precision, good for complex geometries, and can produce both functional and aesthetic prototypes. Quick turnaround times.
  – Cons: Higher costs for one-off prototypes compared to some other methods.
• 3D printing (Direct Metal Laser Sintering or DMLS)
  – Pros: Suitable for complex designs that might be difficult to machine. No need for molds or tooling. Quick for small quantities.
  – Cons: Surface finish may require post-processing. Might not have the same mechanical properties as traditionally manufactured parts.

Certainly! In our factory, we have advanced machines known for their precision and versatility. Our skilled team ensures top-quality results across various machining technologies, not only limited to 5-axis machines. For detailed precision specifications for each technology, please visit the production method page here (link).

Technically, we do not offer VDI (Visual Display Interface) finishing in vacuum casting. However, we can achieve surfaces that are close to VDI standards through the use of sandblasting. Sandblasting can provide a textured finish that simulates the appearance and feel of VDI finishing to a certain extent. If you have specific VDI requirements or need a particular surface finish, please let us know and we will work with you to find the best possible solution.

The solution is straightforward: Which color would you like? At Protolis, we provide a diverse array of colors. While certain technological constraints exist, we strive to accommodate the majority of customer requests. Feel free to challenge us and ask for your desired color!

Certainly! For CNC machining, we offer ABS (Acrylonitrile Butadiene Styrene) and PC (Polycarbonate) materials. In terms of vacuum casting, we utilize Heicast 8260 resin. If you have any specific material requirements or if you need further information, please feel free to let us know and we will be happy to assist you.

You need to consider the purpose of your prototype. If your goal is to conduct functional tests, it’s crucial that the material used closely resembles what you intend to use in the final product. For example, if you’re aiming for a real-world stress test, your material should accurately replicate the mechanical property you anticipate in the end product. Your prototype should employ a material that accurately replicates that effect. However, if your objective is to validate the design, the mechanical properties are less critical.

Absolutely! We offer a range of plastics that meet food-grade standards. For CNC machining, our available materials include PC (Polycarbonate), PP (Polypropylene), PE (Polyethylene), HDPE (High Density Polyethylene), and PTFE (Polytetrafluoroethylene). When it comes to vacuum casting, our primary choice is Heicast 8158 resin. If you have any specific material requirements or need more details, please don’t hesitate to reach out to us. We’re here to assist you.

Brass machining offers good value for its price. It provides good strength and high corrosion resistance. It requires no painting or plating, making it a relatively low maintenance material.

Brass is a very strong metal and can be heated to 930°C (1,720 degrees Fahrenheit). This alloy metal is a mixture of copper and zinc that helps conduct heat.

Yes, stainless steel can still rust! Stainless steel is armed with built-in corrosion resistance thanks to its minimum of 10.5% chromium composition. Neverthless it can and will rust in certain conditions (although not as quickly as conventional steels) when exposed to damaging chemicals, saline, grease, moisture, or heat for prolonged periods of time. Stainless steel with 16% chromium are yielding stronger protection against rust.

Stainless steel is usually chosen for its corrosion resistant properties. Austenitic grades such as 316 and 302 stainless steel are among the most sought after for corrosion resistance due to high levels of chromium. Ferritic steel grades and martensitic are more affordable but will have less corrosion resistance.

Stainless steel machining often takes longer and may involve more tool wear, making it somewhat costlier than machining softer metals.

Pure copper is very hard to machine due to its ductility and plasticity. Copper alloys containing certain elements are called “free machining materials” and have higher machining speed, improved surface finish, smaller chips, and longer tool life.

Copper corrodes when exposed to the atmosphere, causing its shiny surface to tarnish. Some factors like saltwater, heat, and acidic compound can make corrosion happen even more quickly. This corrosion can eventually cause holes or pits in the metal’s surface. Some protective coatings are available to prevent this problem.

There is a multitude of brass materials but Brass 360 is the most common type of brass. Brass 360 is known as free-cutting brass because easy to cut and drill. With an excellent machinability and moldability, this material is suitable for soldering and brazing work and commonly used to manufacture hardware components, fittings, valves and fasteners.

In vacuum casting, achieving consistent color across different batches of casted parts can be challenging due to various factors like material, pigments, mixing, and environmental conditions. To enhance color consistency, it’s crucial to collaborate with experienced casting service providers who have processes to minimize variations. However, some degree of variation may still occur, especially with certain materials or complex pigmented resins. Effective communication with your supplier regarding color requirements and expectations is vital to meet your needs.

Should you have any specific demands or inquiries, please feel free to contact us. We are readily available to assist you.

There are several mechanical finishes available for CNC-machined aluminum parts, each serving a specific purpose and aesthetic preference. Some of the common finishes for CNC aluminum include polishing, brushed finish, sand blasting, and bead blasting.

In addition to these mechanical finishes, there are also surface treatments available for CNC-machined aluminum parts, which can further enhance their properties. Two common surface treatments for aluminum are:

• Anodizing: Anodizing creates a protective oxide layer on the aluminum surface, providing corrosion resistance and the option for coloring.
• Powder Coating: Powder coating involves applying a dry powder to the aluminum surface and curing it, resulting in a durable and aesthetically pleasing finish.

We offer a variety of finishing options for both plastic and metal prototypes, including: mass-dyed, painting, powder coating, technical polishing, fine or cosmetic polishing, anodizing, black oxide, and more.

These finishing options allow us to meet your specific requirements and provide the desired surface quality and appearance for your prototypes. You can find more details here.

Like certain other plastic parts, options such as mass tinting or various post-fabrication processes like mechanical finishing, polishing, painting, or surface treatments such as chrome plating are possible.

We ensure that your parts are delivered to you promptly through express shipping, typically arriving within 3-4 days upon completion. To facilitate timely delivery, we schedule our work to send your parts on Fridays, allowing you to receive them on the following Monday.

While our quality control is rigorous, if you happen to receive parts with issues, don’t worry. You’ll have a dedicated project manager you can reach out to for help. They’ll work quickly and efficiently to find a satisfying solution to any problems you encounter with the parts. Your satisfaction is our priority.

The time it takes to receive your parts can vary widely and depends on factors such as the manufacturing process, complexity of the parts, quantity, and your chosen shipping method. We will provide you with an estimated delivery time in the quotation.

The lead times we provide in our quotations are in calendar days. They start after the completion and confirmation of the design for manufacturing review and the beginning of actual production.

You can visit our quote page or send us an email with the following information about your project: requested material, number of parts, desired finishes, and any 2D/3D files you have. If you have additional project details, please share them with us as it will assist us in providing you with a personalized response. Upon receiving these items, we will promptly send you a quote within 24-48 hours.

Our competitive pricing is achieved through several key strategies.

1. Firstly, we establish strong relationships with material suppliers, allowing us to secure competitive rates for the materials needed in production.
2. Secondly, our highly skilled and experienced workforce ensures efficiency and quality, reducing the likelihood of costly errors and the need for extensive quality control measures.
3. Thirdly, our manufacturing processes are optimized for efficiency, minimizing waste, reducing production time, and lowering labor costs.
4. Finally, we embrace advanced manufacturing technologies and automation, further cutting labor expenses and boosting production speed.

These cost-saving measures enable us to offer competitive prices while maintaining high-quality standards and service.

Yes, you can upload 2D drawings to receive a quote for your parts. However, for complex parts where precision and accuracy are crucial, we highly recommend providing 3D drawings. This allows us to have a more comprehensive understanding of the part’s geometry and intricacies, ensuring a more accurate and detailed quote. So while 2D drawings can suffice for simpler parts, 3D drawings are essential for complex projects to guarantee the precision you need.

We don’t have a minimum order quantity (MOQ) for prototypes, and we can manufacture as few as one piece to meet your needs. However, for small series production from molds, the MOQ may vary depending on the specific project requirements. Factors such as material waste and labor during adjustments are considered when determining the MOQ. We aim to be flexible and accommodate the unique needs of each project, so feel free to discuss your specific requirements with us.

You can expect to receive a quotation from us within 24 hours for most requests. However, if your project is more complex and involves customizations, it may take a bit longer. In such cases, we may need additional time to gather all the necessary information or consult with our team to provide you with the most accurate and detailed quotation possible. Our goal is to ensure that you receive a comprehensive and timely response to your inquiry.