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MAINTENANCE FREE CHAINS FOR PROOVERS AND BAKING OVENS

Taking advantage of the Mecasec® technology, exclusive of ZMC, a whole range of self-lubricating chains has been designed and manufactured especially for the production of bread and other bakery products.

In particular, these chains are used with excellent results, both in terms of duration and performance, in the leavening and baking lines consisting of vertical conveyors, originally designed for the production of baguettes by a well-known French OEM.

The Mecasec® bushes, consisting of a metallic weave embedded in a layer of self-lubricating material, are inserted both between the pin and the bush and between the bush and the roller, even when the latter is mounted outside the chain. Mecasec® technology allows operating at temperatures up to 250 ° cleanly and efficiently without using lubricating products inside the oven or the proover. A further appreciable advantage is the low coefficient of friction guaranteed by the Mecasec® bushes thanks to which it is possible to obtain a silent operation and an advantage in terms of energy efficiency.

By adopting the appropriate design features, Mecasec® technology can be used for many other applications in a wide range of temperatures and workloads.

For more information, don’t hesitate to contact us

SELF-LUBRICATING CHAINS FOR ICE CREAM REFRIGERATION TUNNELS

The latest generation of refrigeration tunnel chains used in the ice cream industry summarizes ZMC‘s experience in this sector. In fact, for more than thirty-five years ZMC has been working with some of the leading manufacturers and end-users of this market to design ever more advanced chains capable of meeting the extreme demands imposed by applications at very low temperatures.

The refrigeration tunnels reach -40°C, a temperature necessary to obtain ice-cream hardening. The chains for this application are characterized by extended pins to which the trays that transport the product are hooked. The chain slides on a guide and moves slightly uphill and downhill engaging on numerous sprockets along the way.

The high-quality construction materials are chosen to withstand the work environment, guaranteeing corrosion resistance and adequate mechanical strength while avoiding the risk of embrittlement, always latent when the steel works below zero degrees Celsius. The plastic elements, bushings and sliding wearpads, are also specially chosen and designed to obtain a long life, that is wear over time, in total absence of lubrication.

The most recent technical innovations concern the geometric shape of the pin, carefully designed to mitigate the effect of concentrated loads on the edges of the bushes and of the shocks suffered in each passage of the chain between the guide and the sprockets.

For more information, don’t hesitate to contact us

THE “SETTE CAMPANILI” (SEVEN BELL TOWERS), AN ANCIENT TRADITION

The 105th anniversary of the “Sette Campanili” Cross Country race falls in 2019 and ZMC, together with other sponsors, contributes to keeping this ancient and prestigious sporting tradition alive.

The first edition of the competition dates back to 1914 and after more than a century the foot race continues to wind along the same 16-kilometer ring that touches the squares of 7 towns in the province of Varese: Cavaria (where ZMC is located), Premezzo, Santo Stefano, Oggiona, Jerago, Orago and Cajello. The route, in addition to the seven bell towers from which takes its name, touches various points of interest in the area, among which the two stairways made famous by the illustrated covers of some magazines stand out. In the past, the Cross Country of the “Sette Campanili” had national relevance, to the point of assigning the Italian Cross Country title on some occasions and of hosting internationally renowned athletes among the participants. In 1926 the popular weekly “La Domenica del Corriere” dedicated the cover to “Sette Campanili” and it was the famous illustrator Achille Beltrame who immortalized in one of his drawings the rise of the athletes along the stairs leading to the Church of Orago.

Nowadays the race remains an indispensable stop for the numerous Cross Country fans and every year it attracts various top-level athletes, a crowd of amateur runners and a large audience along the way.

Chains for bottle washing systems

Through a long and fruitful collaboration with the sector’s customers ZMC has developed a complete and reliable range of chains used in the systems dedicated to the washing of bottles and more generally of glass containers.

Most of the applications concern the food industry and in particular the beverage sector (beer, soft drinks etc.) but the same concepts are also used in the pharmaceutical field. In the design and construction of these chains the main theme is to guarantee durability and reliability in heavy operating conditions due to both the environment and the increasingly high productivity required in the sector.

The chains work immersed in baths with added detergents that can contribute to the oxidation of the chain, lubrication is not allowed and in addition the recycled bottles put in circulation various abrasive residues due to both the dirt that is collected inside them and the decomposition of the labels.

In these chains, constructional strength is sought in every detail right from the design phase. The experience of ZMC in the choice of the steels used and in their heat treatment is also crucial.

In this case, two typical chains of the sector are highlighted, one with a welded attachment and the other with a bent attachment. In the second case, the photo shows the version with protruding screws used for fixing the crossbar that transports the bottles loaded into special cells.

For more information, don’t hesitate to contact us

Chains with copper plated pins

The copper plating of the pins is historically a typical and recognizable feature of various ZMC chains.

The galvanic copper coating is performed on the pins of our chains for precise technical reasons that involve both the quality of the product and safety at work.

The riveting operation concludes the assembly of the chains, it provides a plastic deformation of the head of the pins to ensure the mechanical resistance in the presence of axial thrusts.

To obtain an effective riveting it is necessary that the pins are not excessively hard, the same characteristic is important to prevent metal splinters from detaching and being projected in the surrounding area while the component is undergoing deformation.

The resistance to wear of the chain, however, would require exactly the opposite, that is a pin with the highest possible surface hardness.

The copper plating intervenes precisely to find a solution to these two opposite requirements. The pins are completely coated with copper, afterwards they are ground on the cylindrical and the coating remains only on the heads. During the heat treatment process, copper inhibits the spread of carbon in the metal matrix of the steel, so that the areas covered with copper do not harden. At the end of the process the copper-plated pins of ZMC have both the ideal characteristics: high hardness of the cylindrical part, such as to guarantee the best performance of resistance to wear, and a soft head, easy and safe to rivet.

A further advantage guaranteed by copper plating is the protection against oxidation that the galvanic coating guarantees to the pin head, including the area of press fit with the plate.

For more information, don’t hesitate to contact us

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