One of the important properties of automatic tray sealer machines of WAS is using hollow pin chains with high quality brands. By considering that engineering and technical unit of WAS reduced the usage of weld in the composition of pieces, this benefit causes selection and fabrication of the pieces with more cost according to the standards.

Welding often causes deformation and non-accuracy in the manufacturing of the pieces, also created tensions during welding causes crack and breakage in the pieces.

Unfortunately number of the tray sealer machines from our country and other countries that are existed in the market, are using welding method for the pieces on the chain because of having less costs for the fabrication of the machine. Therefore it causes decreasing of the life of the chain, correct movement and breakage of the pins during the time.

Hence it has high costs during the repair and storage for manufacturers.

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