L.B. Sidertech is offering the world widest range of consumables, devices and machineries for tube isdustry. Starting from steel coil preparation till tube packing and second hand machineries.
- Steel works and coil production -
- Tube industry and service centre for coils cutting and tube making -
- Steel strip edge preparation in tube mill entry -
- Steel strip forming - profiling in tube mills -
- Steel tube welding -
- Welded bead removing, scarfing -
- Arc Spraying metalizing system for pre-galvanized and aluminized steel tubes -
- Tube Protective oil atomizing (antioxidation) in line -
- Non Destructive Testing device Eddy Current in line -
- Tube cutting off in line -
- Tube discharging , packing with optional devices for tube air blowing off , chamfering , threading and bevelling -
L.B.Sidertech Srl , is the sole official distributor in Italy and North Africa of German BERGER GROUP GmbH . This company is operative since far 1957 . It has created a working style in our market , invented new technologies becoming a name recognized worldwide as synonymous of quality , reliability and solutions for whatever kind of problems inherent to our market's jobs. This company is the worldwide leading company in the production of machines to work knives , scissors and more in general blades . Berger machines cover a wide range of jobs in the manufacturing process of knives from rough grinding till polishing and finishing . Our systems are integrated and modular and can be all robotized . They are all ready do comply with the European project of HMI = Human Machine Interface.
Since 70 years Berger is at the top of the technology and leading this market where all main worldwide knives manufacturer are using our systems , featured by an extreme precision , extremely high reliability and long lasting parts .
We are now developing robotized re-sharpening systems for knives .
So that we approach now also this new service market after the manufacturing .
Berger Group is composed by a number of other companies that the family Berger acquired during the years . Now the offer is really integrated by other branches such as :
Heinz Berger Maschinenfrabrik = the main mother companay for grinding machines for blades
Hauschild = for 60 years one of the leading company in polishoing , deburring , grinding pots and table tools and all custom made parts
Nell Jr =specialized in grinding and micro-grinding and sharpening of razor blades and surgical tools and many other parts .
Werner Peters = for 30 years one of the leading company for grinding , deburring , polishing and sharpening of razor blades .
Julius = this company has been an epoch making company in the strip edge preparation for different applications . They are the leaduing in strip preparation for Tube Laser welding .
MEC - Metallizing Equipment Company Ltd , is one of the worldwide leading company in the field of metal deposition by spraying technologies . L.B.Sidertech is their agent since 2009 . Thermal Spraying, a group of coating processes in which finely divided metallic or nonmetallic materials are deposited in a molten or semimolten condition to form a coating. The coating material may be in the form of powder, ceramic-rod, wire, or molten materials. THERMAL SPRAYING - What it Was and What it Has Become: On the eve of celebrating the one hundred anniversary of its discovery, thermal spraying looks back to its roots - early experiments in which liquids were broken up into fine particles by a stream of high-pressure gas. Efforts more directed at producing powders rather than constructing coatings. It fell to one Dr. Max Ulrick Schoop of Zurich who recognized the possibility that a stream of molten particles impinging upon themselves could create a coating. His work, and that of his collaborators, resulted in the establishment of the thermal spray process.
This process has fostered a worldwide industry serving over thirty technology sectors and generating sales of over two billion dollars per year. This article traces the history and development of the principal flame and electrical thermal spray processes. In addition to using chemical means to plasticize the input consumables electrical currents are also used. Typically, electrical energy is used to create a heat source into which powder, and more recently wires, are fed, melted/plasticized and conveyed onto the surface to be coated. Major, commercially employed electrical methods, used to construct coatings include non-transferred arc plasma, RF plasma, and wire arc.
THERMAL SPRAY METHODS
Molten Metal Flame Spraying, a thermal spraying process variation in which the metallic material to be sprayed is in the molten condition. It has long been recognized that fluids may be broken up into very fine particles by a stream of high velocity gas emanating from a nozzle. Early experiments using this atomizing approach appear to have been directed at producing metallic powders rather than coatings. It was left to Schoop to appreciate the possibility that a stream of metallic particles, formed from a molten source, could produce a coating. Myth has it that Schoop developed the concept when playing "soldiers" with his son and observing the deformation of lead pellets being fired from a toy cannon against a brick wall. Whatever the rationale, it can be stated that the pioneer work of Schoop resulted in the discovery and development of metal spraying and subsequently the "Thermal Spray Process".
Powder Flame Spraying, a thermal spray process in which the material to be sprayed is in powder form. Powder flame spraying is probably the simplest of all the spray processes to describe - feed a powder through the center bore of a nozzle where it melts and is carried by the escaping oxy-fuel gases to the work piece. Unfortunately, this approach yields coatings high in oxides and with void contents approaching 20 volume percent (v/o). However, coating quality can be improved by feeding air to the nozzle through a small jet, which reduces the pressure in a chamber behind the nozzle. This chamber is connected to the powder feed hopper. In this way a gentle stream of gas is sucked into the gun and carries powder with it.
Wire Flame Spraying, spray process in which the feed stock is in wire or rod form. In about 1912 Schoop developed the first device for spraying metal wires. The apparatus consisted of a nozzle in which a fuel, probably acetylene or hydrogen, was mixed with oxygen and burned at the nozzle's face. A stream of compressed air surrounding the flame atomized and propelled the liquefied metal. Process continuation depended on feeding the wire at a controllable rate so it melted and was propelled in a continuous stream. Schoop approached this problem by using a turbine to actuated gears and drive rolls that pulled the wire into the nozzle. This apparatus appeared to him to be similar to a pistol or gun, and because of this, he and we, refer to thermal spray devices as "guns" or "pistols" and never "torches". Schoop' concepts of spraying solid metals has given rise to the thermal spray industry and for this reason it is sometimes referred to as the "Schoop Process". Regardless, the wire flame spray gun has not radically changed since the days of Schoop. While there have been changes in nozzle and air cap design, replacement of the air turbine with an electrical motor and even the use of barrel valves the basic principal, however, remains the same "push or pull a wire into a flame, melt and atomize it and deposit the molten droplets to form an adherent coating".
Ceramic Rod Flame Spraying, a spraying process in which material to be sprayed is in ceramic rod form. The spraying of ceramic rods dates back to the early 1950s when a demand arose for heat resistant refractory coatings. Plasma had not come into its own and flame sprayed powder coatings, due to their porous nature, lacked the integrity and protection required. The solution was rather simple - Coors Ceramic and Norton developed ceramic rods, referred to as Rokide, while the Metallizing Engineering Company (Mogul), modified a wire gun to spray rods. What differentiated the guns were the drive rolls. A wire gun had serrated steel rolls to grip and feed the wire while the Rokide gun employed "V" slotted fiber rolls that pinched the rods and fed them forward. The principle of operation in either gun is similar - the nozzle's flame is concentric to the wire or rod in order to maximize uniform heating. A coaxial sheath of compressed gas around the flame atomizes the molten material and accelerates it to the workpiece. Particle velocities in both the wire and rod process are approximately the same - 185 m/sec (600 ft/sec) while coating densities have been measured at approximately 95 v/o.
L.B.SIDERTECH has got 30 years well established worldwide network of partners offering second hand machineries . We also have machine shops able to refurbish and up to date technologically second hand machines . Send your requests we will surely find out the best solutions suitable for your needs .
Consumables for welding and scarfing - Refrigeration tube end finishing - Annealing - Diamonite guide borders - Head scarfing - tools - Punches - Glass bushes - Punches - Pirex glass - Electrodes - Ceramic - Bushes
