Mechanical operations - Import export

STEEC is able to carry out milling and micro-milling operations on complex mechanical parts with increasingly finer dimensions and increasingly tighter tolerances. STEEC carries out micro-drilling operations to manufacture not only parts but also very high precision electrodes. That enable all spark erosion micro-drilling and countersinking operations to be performed. Equipped with a stock of high-tech machines and leading edge IT tools, such as the Solidworks software, STEEC is capable of meeting special requirements and providing innovative solutions for each of its customers. The experience gained in other high precision machining technologies has enabled STEEC to develop innovative milling processes that are well recognized in the industrial environment.

Mechanically operated valves with button and roller lever with full aluminum. The sturdy aluminum construction ensures strength and durability. Available in 1/8″ sizes and features 3/2 and 5/2. Other sizes on request.

Body and jaw holder hardened and ground. Note for ordering: Supplied with hexagon crank handle. Order jaw plates separately. Note: Mechanically operated centric vice. Suitable for automation: prepared with gripper slot for handling systems. Flexible mounting: suitable for zero-point systems, mounting on machine tables or on custom systems via a baseplate. Centring precision: +/- 0.02 mm. The use of a torque wrench is recommended to achieve a controlled clamping force. Features: Clamping slide and spindle nut in one piece Slots and fastening threads for mounting attachment jaws Reversible jaws (accessories) with lateral thread for workpiece stop enables a wider clamping range Good swarf and coolant removal

De Smet Engineers & Contractors has been involved in all steps of the production of vegetable oils from oilseeds crushing for the construction of Edible Oils Plants; in this article you will find a more detailed understanding about the process of vegetable oil extraction: First step: Preparation of the oil containing material prior to solvent extraction Cleaning and Drying The plant feedstock must be cleaned so that foreign matters are removed. This applies particularly to sand/silicate and iron which may damage the preparation plant equipment. For some seeds or for some processes the incoming material moisture must be controlled and adjusted for better efficiency of subsequent operations. Mechanical preparation Most of raw materials needs to broken to reduce the particle size to ensure proper cooking and flaking. They are then heated in cooking / conditioning equipment and their moisture further controlled in addition to be softened before the next mechanical operations. After cooking, heated grits are flaked so that the oil cells are broken and the oil more readily available for further solvent extraction or mechanical pressing. Pressing Oilseeds containing above 20 to 25% (rapeseed, sunflower seeds, cottonseeds...) are generally pressed mechanically in order to extract most or part of the oil available in the feedstock. This operation is done through full pressing for maximum oil recovery leaving up to 5 to 10% in the final cake which is marketed as such or through a low pressure pre-pressing operation producing a cake with higher residual oil content which is then recovered in the solvent extraction plant. Dehulling Oil extraction plants produce a solid finished product in addition to the extracted oil; this product (cake or meal) is normally used as an important component for animal feed recipes. Depending on the meal destination, its protein content often needs to be increased and its fibre content minimized. Such characteristics are generally achieved through decortication or dehulling operations that separate the outer part of the feedstock before extracting the oil. Second step: Solvent extraction of the material suitably prepared Extraction In the solvent extractor, solids (Flakes from the flaking machines or cakes from the pre-presses) are conveyed through the equipment while a mixture of hexane and oil (miscella) is sprayed counter-current. The extractor produces therefore deoiled solids containing solvent and miscella. Desolventization Deoiled solids coming out of the extractor are conveyed to a dedicated equipment that completely removes the remaining solvent while preserving the meal quality: the desolventizer. This apparatus is usually combined with additional sections for drying and cooling the meal to the required storage and market parameters. Miscella distillation Solvent contained in the miscella is completely removed under vacuum and optimum temperature for preserving oil quality. The solvent from the distillation as well as the one removed at meal desolventization stage are then recycled to the extractor. Solvent recovery Since the air entering the process together with material fed to the extractor is laden with solvent when it is removed from the plant it first pass through a specially designed absorption column to limit emission to an acceptable level. Meal treatment The extracted meal is often subject for further treatment, including grinding to obtain the required granulometry or pelletizing to reduce its volume during transport.