A list of the innovations we have introduced in the Juntor

Juntor innovations

 

A list of the innovations we have introduced in the Juntor

The Juntor is a watch that we have been developing for several years, and therefore, has improved considerably since its first version (Old Juntor in English). This post is a compilation of the most important innovations we have incorporated into the design, development and mechanization of the Juntor. Almost all parts (except the swiss movement) are made in our workshop in Alcoy (Spain)

The Juntor design is based on something as simple as the shape of a nut. On this basis we developed a design that suppressed the watchcase legs. The watchcase legs are very uncomfortable especially in watches that their size exceeds 40 mm. The legs were replaced by screwed plates to back case, with two pivots that are inserted inside the belt. This allows a great attachment to the middle case and the back case. These two pieces are machined with niches or channels that allow the lodging of the belt in a very precise way.

The watch bezel is rotating with twelve concave perforations, with a width of 0.4mm which is exactly the size of the ball of the pushbutton. These upgrades have been designed to support the watch bezel just in the numbers where the concave perforations are located. They allow great stability and a smooth and firm rotation of the bevel in the middle box. The hexagonal shape with the corners in cantilever allows a perfect grip of the bezel when rotating.

The bezel has a titanium-molybdenum support spring allowing it to maintain the shape permanently and expand with body temperature. This causes the bevel to be very difficult to detach by handling it.

The middle case withstands a sealing of 20 ATM. The watch movement is directly screwed to the middle case. To achieve a hermetic watch case, it has to be machined reaching tolerances until 7 microns in crown, or centesimal tolerances on watch case contact surfaces. As well, it has four holes for screws that are for model aircrafts, allowing them to be easy to get. They are made of 316 L steel and we finished them by polishing. A groove has been carved for the strap to fit the context of the middle case with a high grade of adaptation.

The back case has a very innovative development. It is built to lodge the strap with two steps that prevent the clamping plates from tipping out. It is also perforated so that the screws pass through the watch back case and can be screwed into the middle case. The back case is machined to the hundredth, which means that the hermetic provided by the flattening is very high.

The strap holding plates are machined two pins height of 2mm. It is measured so that there is no lever with the strap attachment. The plates have two holes for two countersunk screws 1,6 x 4 ISO obtainable in a store of model aircrafts, polished by us. The plates are also engraved by machining.

The buckle is designed within the context of the watch case, which is circular with geometric edges. The buckle is machined together with the pin for the holes in the strap. It is big and powerful in its design with engraved machining 0.15. It has a screwed bolt of 26mm with screws of 3mm.

The Juntor is made of 7075 aluminum in most parts. This aluminum is very difficult to machine to the centesimal tolerances that are necessary for the Juntor. 7075 aluminum is harder than steel with respect to Vickers hardness, meaning less scratching. It has a specific weight of 2.7 grams / cm³ which shows that the Juntor weighs 3 times less than steel or bronze. The anodized makes it difficult to scratch as well as it is better regarding aesthetics plus it is possible to choose colors. In addition the anodizing is completely matte, different to what is used in other products where the anodizing is satin or even shiny.

The strap is being manufactured in two types of material, fiberglass with PVC and polyurethane cast each. Fiberglass witch PVC are waterproof and withstand wet. In fiberglass strap, there is an internal attachment made in 3D of polyamide to give curved shape in the exit of the watch case. Cast polyurethane has the advantage that it is more resistant to traction than natural rubber, acids and high temperatures. On the other hand, it is easy to make individual molds for very large dolls, which allows a nice level of customization. We were the first company in the watch industry in using 3D printed for watch part.

All the Juntor development processes and innovations using the new Autodesk Fusion 360 software. It is the first industrial design software to be developed entirely in the cloud, from drawing, modeling, rendering, simulation and mechanization. The advantage of working on the cloud is the possibility of consulting all data of the same, solid models, model editing, drawings, machining paths, using a Smartphone everywhere in the world. This makes it very useful when working with the machine since it is not necessary to use the computer for any consultation as all the information is contained in the cloud using the Fusion 360 App.

Moreover we have tried various ways of machining aluminum to achieve the highest level of precision. All the pieces have been made by milling and micro milling of the different parts that set up the Juntor, where milling is not conventional. Updated milling such as trochoidal milling has been used along with 3D milling and conventional milling. That has influenced that the machining of the watch cases is very complex but is very accurate for aluminum.

 

my wife and me

My wife and me in our workshop

 

What next?

The next innovations we want to incorporate are related to weight. We want the crystal to be polycarbonate with protective films and anti-reflective on both sides, which would reduce the weight considerably. We also want the movement plates and bridges to be manufactured by us in aluminum with a substantial decrease in the weight of the watch. We want just to make a bronze bezel because the watch would not the weigth too much.

As well other material we want to use for making this watch is titanium, niobiumItr² or magnesium. Magnesium would be coated with a Keronite ceramic coating in order to give harder to the Juntor watch case.

We are working with augmented reality in order to see the Juntor in a very simple way. For example, once downloaded the AR app in a Smartphone, it is possible see the Juntor on a five euros bank note. We are also working in a virtual store to be able to purchase the Juntor watches in addition to the conventional online skop.

 

Juntor bezel bronze with shale fiberglass strap

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