Slate mixers operate and maintain slate mixing machines that mix multicolored slate granules used for asphalt-coated roofing felt surfacing.

Tasks

Tasks include -
(a) Operating extrusion, moulding, mixing, pumping, compacting, grinding and cutting machinery to manufacture and finish precast concrete and stone products;
(b) Operating plant to produce cement, lime and clinker, including loading and unloading ingredients and operating continuous feed equipment such as pumps and conveyors;
(c) Operating plant and machines which weigh and mix sand, gravel, cement, water and other ingredients to make concrete;
(d) Operating plant and machinery which assembles and fills moulds with concrete and artificial stone mixtures, removes castings from moulds and finishes surfaces of precast products;
(e) Cutting, grinding, drilling, sandblasting and polishing concrete products and stone blocks, slabs and products to the specifications for the job;
(f) Checking production plans and specifications to determine and select materials, ingredients, procedures, components, settings and adjustments for extrusion, moulding, mixing and compacting machines;
(g) Monitoring plant and machines during operation by observing instruments such as temperature and pressure gauges, and adjusting controls and reporting malfunctions as necessary;
(h) Collecting and examining samples of mixtures and finished products for conformity to specifications and adjusting machine settings accordingly;
(i) Checking and maintaining production records, including information about quantities, dimensions and types of materials and goods produced;
(j) Arranging and assisting with plant and machinery maintenance and repair.