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Ring Selector
Manufacturing
Here are 4 ways to make a wedding ring :-
1) ENTIRELY BY HAND
2) CASTING
3) SECTIONING EXTRUDED TUBE
4) FORGING & MILLING
Making entirely by hand, casting and using extruded tubing all have inherent problems and limitations :-
MAKING BY HAND normally involves rolling metal, drawing wire and shaping it around a triplet (steel shaft). This means that the ring must be heated (annealed) and soldered (seamed).
CASTING ring blanks is popular because it’s cheap. Although seamless, the metal has again been heated. Some porosity is normally evident making finishing imperfect.
EXTRUDED RINGS are sectioned form extruded pipe. This method does not allow for deep sidewalls and limits profile options. Rings manufactured in this way are usually flat on the inside and, as such, are less comfortable.
FORGING & MILLING BY HAND creates rings of a superior quality. These processes are very labour intensive and require huge investment in specialist equipment. Forging and milling create seamless rings, hardened through the production process, with numerous profile options and allow for a perfect finish. This is how all Purerings wedding rings are made.
The manufacturing process is divided into 7 PRODUCTION STAGES :-
1) The alloys are cast into bars using vacuum casting machines. The bars are then rolled into plates using industrial electric rollers. When the plate reaches its final dimension, circular blanks are punched out with a powerful (90 metric tonne) hydraulic press.
2) In the next step the core or “kern” is incised or “caved-in” with an extruding press. This pushes the metal to the “rand” or border. This process increases the hardness value that is required, according to the Vickers Hardness Scale (HV).
3) The kern is then separated from the blank using a piercing press.
4) At this point the order-related production begins. Each ring is produced individually and specifically for each client and the created “blanks” are assigned to customer-related orders. The first production step is “stamping”. The blank is pressed flatter with a hydraulic press. This governs the ring width.
5) It is then rolled from a blank with a hole to its formative shape as a ring. All the previous processes serve to further harden the ring (HV). Continuous quality control is maintained by many checks and measurements.
6) After rolling, the ring is “dressed” to size, making it to the customer’s finger size. A hardness test is performed to ensure a minimum hardness according to the criteria for that particular metal or combinations of metals. Starting with the edges, and then from both the external and internal profiles of the ring, turning or “milling” is now done by hand. This applies the design (groves, decoration etc) by milling off surplus material.
7) Finally the ring is HAND FINISHED with the required surface effect. At each and every stage the ring is continuously examined and scrutinized. The final quality control is then performed with illuminated binocular magnifying equipment.