We are known for our flexibility, which enables us to effectively manage late modifications and changes. Our mastery of foundry is also expressed through rigorous monitoring at every stage of production to meet the specific requirements of our clients and ensure the quality of our deliveries. Our foundry capabilities extend to aluminum alloys, whether based on numerical data or existing parts. We work with sectors such as aerospace, defense, automotive competition, automotive development, telecommunications industries, laser systems, and braking systems.

With a surface area of 3,500 m², our Saint-Ouen-l’Aumône site has a modern and well-equipped infrastructure to meet all foundry challenges: 5 and 10-ton overhead cranes, 16 molding tables, sand preparation units, core shooting machines, melting and heat treatment furnaces, as well as advanced inspection equipment such as spectrometers. At Guillet Tech, we offer a wide range of castings, ranging from a few grams to over 100 kg, with excellent metallurgical, geometric, mass, and visual characteristics. We take pride in providing high-quality foundry solutions that meet the strictest requirements of our clients.

Upon receiving client data, a feasibility evaluation is conducted to determine technical viability, quality levels, and associated risks. This study allows for close collaboration with the client’s design office, facilitating personalized support in their development. With specialized expertise since 1946, Guillet Tech offers responsiveness and know-how while adopting modern tools such as CAD and CAM to improve the design and manufacturing of foundry molds.

Starting from models created based on our molding study or existing tooling, our molding workshop allows us to control the entire production chain. Once on-site, our challenge is to manufacture “ready-to-pour” molds while managing time and space. The sand, once mixed and prepared, undergoes transformation until it hardens after being worked and shaped.

During this time, we primarily visualize the desired part, determining the material flow path that will influence the gating system, risers, and cooling points. The half-molds, once filled and equipped with cores and thermal reaction elements, undergo a series of treatment, bonding, and re-molding with the help of a mold handler. The furnaces, true sanctuaries of the foundry, receive special attention. Activated in the morning, they undergo successive operations of purification, degassing, control, and material analysis on multiple test samples. The appropriate temperature for a given melting is ultimately the decisive criterion for successful casting.

When all metallurgical criteria are compliant and molds of the same aluminum grade family are ready, we can proceed with casting according to a predetermined order that conditions internal thermal evolution and material flow. Demolding is a moment of truth, a kind of hatching that reveals the true reality, technicality, and new existence of the raw part. The resulting product must then undergo sawing, finishing, often heat treatments to improve material structure and mechanical characteristics, as well as shot blasting and inspections, to which we attach great importance.

Materials and Applications

Among the commonly used alloys, we have:

AS5U3G, AS7G03, AS7G06, AS7U3G, AS8U3G, AS9U3, AS10G, AU5GT, AU5NKZr, AI Si5Cu3Mg, Al Si7Mg0.3, Al Si7Mg0.6, Al Si7Cu3Mg, Al Si8Cu3Mg, Al Si9Cu3, Al Si10Mg, Al Cu5MgTi, Al Cu5NiCoSbZr.

Heat treatments such as Y20-Y30(F) and Y23-Y33(T6) are also applied. The quality of sand, resins, and tools is essential. Other synthetic resins can be used for models created by stereolithography.

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We design and manufacture all our products tailored to our clients. Here are some examples of our achievements: (Include some photos of their products)

Our sand processing capacity is 0.5 ton/hour, suitable for the considered activity and allowing the combustion of organic components in the sand. This reduces our ecological footprint from 150 tons of sand per month to 50 tons per year. Our laboratories enable us to perform the following controls:

• Radiography
• Micrography
• Liquid Penetrant Testing
• Ultrasonic Testing
• Spectrometry
• Hardness Testing
• Mechanical Testing
• 3D Inspection
• Pressure Testing
• Traditional metrology tools.