PERFECT SURFACES WORLDWIDE A WELCOME FROM THE TECHNOLOGY LEADER in - PowerPoint PPT Presentation

PERFECT SURFACES WORLDWIDE

A WELCOME FROM THE TECHNOLOGY LEADER in mass finishing Proverbial ingenuity, coupled with German efficiency and a love of perfection, are the best qualifications for developing successful ways of creating immaculate surfaces. Driven by these attributes of German engineering, OTEC, with its innovative technologies, has grown into the industry trendsetter in just a few years. PERFECT SURFACES WORLDWIDE | 3

MARKETS AEROSPACE INDUSTRY STAMPED, TURNED AND MILLED PARTS AUTOMOTIVE INDUSTRY TOOLMAKING INDUSTRY JEWELLERY AND WATCHMAKING MEDICAL AND PHARMACEUTICAL CERAMIC AND PLASTIC PARTS INDUSTRY INDUSTRY PERFECT SURFACES WORLDWIDE | 5

JEWELLERY AND WATCHMAKING INDUSTRY PERFECT SURFACES WORLDWIDE | 6

JEWELLERY AND WATCHMAKING INDUSTRY Surfaces like hand-polished  Surface quality for the highest requirements  Special feature of the OTEC process  OTEC has a lot of experience with filigree functional parts  Combination of process and machine technology enables hand  Highest surface quality polishing quality  Process reliability  Machining of stainless steel, platinum, gold, silver or ceramics  Sophisticated technology  Best process know-how PERFECT SURFACES WORLDWIDE | 7

JEWELLERY AND WATCHMAKING INDUSTRY Traditional process  Conventional manual process  Time- and cost-intensive  Traditionally, after casting the sprue and the casting skin is removed and prepared with a file and sandpaper or hand grinding device  Then machine operations follow, such as shining, vibratory finishing and pre- polishing  Afterwards, each individual piece of jewellery is polished by hand to a high gloss finish and galvanized if necessary PERFECT SURFACES WORLDWIDE | 8

JEWELLERY AND WATCHMAKING INDUSTRY The OTEC process  Development and production of special grinding and polishing machines  Sophisticated process engineering tailored to the entire production process  Worldwide market leader in surface finishing for jewellery production  Reduction of manufacturing costs for surface treatment  Up to 60 percent of the jewellery produced can be polished by machine, ready for sale, without tedious and time-consuming post-processing by hand!  OTEC solutions:  ECO-Maxi for a few workpieces  CF for bulk goods made of all kinds of precious metals  DF for up to 400 heavy rings per hour PERFECT SURFACES WORLDWIDE | 9

JEWELLERY AND WATCHMAKING INDUSTRY Advantages with OTEC  Highest technical innovations of disc finishing machines – several gap systems available  Highest quality of machine components  Longest life for systems  Highest stability of the processes  Highest know-how in processing and process development  Simple operation and easy handling  A wide range of high quality media  Reliable all-round service by trained specialists - support beyond purchase PERFECT SURFACES WORLDWIDE | 10

HOW CAN WE ACHIEVE A SMOOTH SURFACE? Chemical and mechanical polishing  Chemical polishing  This is a way of removing metal from the surface of the jewellery by chemical reaction.  Used mainly for areas that are difficult to access, as this method makes it very difficult to achieve perfect shiny surfaces  Mechanical polishing:  Most effective procedure with best results  Surfaces of the highest quality and gloss  OTEC-process PERFECT SURFACES WORLDWIDE | 11

MASS FINISHING for jewellery and watchmaking industry DISC FINISHING MACHINES ELECTROPOLISHING MACHINES DRAG FINISHING MACHINES PERFECT SURFACES WORLDWIDE | 12

DISC FINISHING MACHINES PERFECT SURFACES WORLDWIDE | 13

DISC FINISHING MACHINES OTEC CF Standard  Innovative technology from the world market leader  Suitable for wet/dry machining  Process container with hot cast inner polyurethane lining  Modular expandable from 1 to 6 process containers  Capacity: up to 2 kg per process container  Bench type machine with aluminum profile frame  Speed control via frequency converter  Siemens PLC touch screen control  Digital display of all relevant processing parameters  Memory for up to 200 programs PERFECT SURFACES WORLDWIDE | 14

DISC FINISHING MACHINES Series CF-T (Bench type machine)  Especially suitable for the dry processing of jewellery  Bench type machine with aluminium profile frame with optional one or two process containers for grinding or polishing of jewellery  Ceramic-gap system  Process container with hot cast inner polyurethane lining  Touch-screen-operated with digital display of process time, speed, errors, compound and other important process parameters.  Capacity: up to 2 kg each process container  Advantages:  Perfect high gloss polish  Economical  Inexpensive PERFECT SURFACES WORLDWIDE | 15

DISC FINISHING MACHINES Influencing factors:  A perfectly polished surface depends on the combination of these influencing factors:  Type of disc finishing machine  Output quality of the workpieces  Kind of processing steps and sequence  Type of processing media  Process parameters such as speed, time etc.  Carat rating of workpieces  Workpiece geometry PERFECT SURFACES WORLDWIDE | 16

DISC FINISHING MACHINES Type of disc finishing machine  All the disc finishing machines have different container designs, gap designs and some adjustable parameters.  Mostly this parameters makes the difference between good and perfect. Container Design Gap Systems  Slowly end function  Dosing unit or dosing pump difference PERFECT SURFACES WORLDWIDE | 17

DISC FINISHING MACHINES Media  There are many different media to use for grinding and polishing processes of gold & silver jewellery.  Choosing the correct media is also one of the most important factors for a good result! Types of different media for jewellery finishing  Plastic grinding chips  Compounds  Walnut shell granulates  Wooden cubes and plastic polishing bodies  Polishing and grinding pastes  Adhesive oil PERFECT SURFACES WORLDWIDE | 18

DISC FINISHING MACHINES Output quality of the workpieces  Cast jewellery should be prepared beforehand for optimum machining results  OTEC process delivers constant results  therefore, the initial quality of the workpieces must all be the same.  Advantages of the preparation  Same output qualities  Reduced process times  Edges remain sharper due to the reduced process time PERFECT SURFACES WORLDWIDE | 19

DISC FINISHING MACHINES Preparation process step by step Casting tree Cutting the sprue Magnetic polishing OTEC-process Sandpaper Removal of the sprue PERFECT SURFACES WORLDWIDE | 20

DISC FINISHING MACHINES Process parameters Process time is the most important parameter for a good result.  Too short grinding time results in high surface roughness and leaves the sandpaper lines on the surface.  Too long process time will damage the jewellery by rounding the edges, cutting the prongs or removing the surface decoration on some parts  Even if it does not harm the design, you lose more metal than necessary. PERFECT SURFACES WORLDWIDE | 21

DISC FINISHING MACHINES Process parameters Speed while processing  At too slow or too fast a speed, the workpieces can damage each other during the process. PERFECT SURFACES WORLDWIDE | 22

DISC FINISHING MACHINES Process parameters Compound ratio  Compound percentage is important because compound removes the waste of gold/silver and grinding media particles from the container and keeps the jewellery clean.  It also provides a buffer effect between the chips and jewellery. 10 l water/compound flow per hour 10 l water/hour flow WITHOUT compound PERFECT SURFACES WORLDWIDE | 23

DISC FINISHING MACHINES Process parameters Continuous water flow  Removes the waste from the process container during the process  Continuous water flow removes the abrasive particles and avoid that they are pressed into the surface. This very important for a following plating process 1 l water/compound flow per hour 10 l water/compound flow per hour PERFECT SURFACES WORLDWIDE | 24

DISC FINISHING MACHINES Type of process + Wet grinding + Dry grinding + Dry polishing PERFECT SURFACES WORLDWIDE | 25

DISC FINISHING MACHINES Wet process - grinding and smoothing/polishing Plastic chips  No hardening of the surface  Very fine grinding possible  No damaging of cubic zirconia  Perfect for soft metals like gold and silver gap 0,4 mm  Helps to remove the waste from process container  Gives a buffer effect for gentle processing  Keeps precious stones safe PERFECT SURFACES WORLDWIDE | 26

DISC FINISHING MACHINES Dry process – grinding and polishing Walnut shell granules  Best polishing results  Easy to handle  Has 7 sizes for different purposes gap 0,05 mm  Can be used for polishing and for grinding  Addition of grinding and polishing paste to dry media  Gives the ability to grind or polish to media PERFECT SURFACES WORLDWIDE | 27

ELECTROPOLISHING MACHINES PERFECT SURFACES WORLDWIDE | 28