Materials of construction. Cast iron properties Resistance to compression Resistance to chemical attack Heat conduction Advantages of cast iron in sammying machine Compression of rollers Squeeze water out Resistance to stress Advantages of cast iron in fleshing machine Resistance to sulfur corrosion attack Resistance to other chemical attack Resistance to stress Machine safety legislation A comprehensive standard of machines Safety requirements’developed in UK by the ‘Tannery European committee for standardization, published as an EN(European Norm) standard making numerous references to EN standards that detail individual and more general safety requirements and systems. EN standards deal with design and function of safety devices, sometimes indicating alternatives. The device adopted must meet what is specified in the standard. Compliance with the requirements is mandatory in the member countries, but the member country machinery manufacturers tend to fit in the safety systems even when exporting their equipments to non member countries. it obviously is always the responsibility of the user to ensure ongoing effectiveness of the safety systems installed on all types of the equipment in operation, a regular check of the safety elements on machines, because of the complexity, should be scheduled. Vital areas to be checked in this way should include: Visual examination of the devices. Verify the interlocks and self checking systems are functional. Verify that safety switches operate correctly. Verify the time taken to stop dangerous motion after tripping device. Check guarding of electrical equipment. Verify that protective devices as such do not represent danger. 36
Materials of construction. Cast iron properties Resistance to compression Resistance to chemical attack Heat conduction Advantages of cast iron in sammying machine Compression of rollers Squeeze water out Resistance to stress Advantages of cast iron in fleshing machine Resistance to sulfur corrosion attack Resistance to other chemical attack Resistance to stress Machine safety legislation A comprehensive standard of ‘Tannery machines Safety requirements’developed in UK by the European committee for standardization, published as an EN(European Norm) standard making numerous references to EN standards that detail individual and more general safety requirements and systems. EN standards deal with design and function of safety devices, sometimes indicating alternatives. The device adopted must meet what is specified in the standard. Compliance with the requirements is mandatory in the member countries, but the member country machinery manufacturers tend to fit in the safety systems even when exporting their equipments to non member countries. it obviously is always the responsibility of the user to ensure ongoing effectiveness of the safety systems installed on all types of the equipment in operation, a regular check of the safety elements on machines, because of the complexity, should be scheduled. Vital areas to be checked in this way should include: Visual examination of the devices. Verify the interlocks and self checking systems are functional. Verify that safety switches operate correctly. Verify the time taken to stop dangerous motion after tripping device. Check guarding of electrical equipment. Verify that protective devices as such do not represent danger. 36
JLS%20204%20Tannery%20Engineering.docx