Chemical fluorine plastic centrifugal pump material molding process skills

When chemical industry more and more high to the requirement of chemical pump, found that ordinary metal chemical pump has been unable to meet the needs of the chemical industry, there must be a kind of ability strong acid alkali chemical pump instead of poor corrosion resistance of metal chemical pump, this is the fluorine plastic chemical centrifugal pump, its structure is simple, the cost is not very expensive, relatively is mainly to to any concentration of acid and alkali type has good corrosion resistance, it solves the problem of the chemical industry's largest. Fluorine plastic corrosion-resistant centrifugal pump production is a complicated and heavy process, in addition to processing technology, should also consider the cost of production, raw material supply, and environmental impact etc.

plastic centrifugal pump is a kind of mixed and disorderly and deep process, in addition to processing skills, should also consider the cost of production, material supply, environmental impact, etc. Compression is one way to fluorine plastic molding process, it is also one of fluorine plastic centrifugal pump using an ideal way to, is to quantitative fluorine plastic ( Powder, granular, fibrous, flake and fragmental, etc. ) In the shape of cavity, and then closed, put inside furnace heated to a temperature must be, and fused activities while under the effects of pressure, slowly filled with the shape of the cavity has given the whole cavity. With fluorine plastic chemical reaction degree added, the melt gradually lose activity into molten body structure and not become solid, after cooling to the temperature must be open mould, for products, and then finished moulding process.

fluorine plastic chemical centrifugal pump is the product of modern science and skill development stage, is accompanied with present and social demand of fluorine plastic products and the onset of a new and high skill. Fluorine plastic based on the above performance characteristics and molding process characteristics, measures for people to explore unceasingly, repeated practice, developed a series of fluorine plastic centrifugal pump. Fluorine plastic centrifugal pump compared with practice common centrifugal pump, both on material selection, or manufacturing process has its own characteristics.

fluorine plastic chemical pump structure length and flange two scales, as specified in the relevant specification and industry standard steel centrifugal water pump performance. Such as the structure length according to GB/T 12221 standard rules, structure contains the flange sealing surface lining thickness of fluorine plastic length. Flange connection dimension according to GB/T 9113. Rule 1. And constraints on the flange end connection, do not allow to choose welding method. To facilitate industrial pipeline unit cohesion is not affected by welding quality of the product.

fabric layer thickness of the judge is not only a matter of science, and practical economic problems. Fluorine-butterfly valuable fluorine plastic, with a thick layer of thin lining the satisfactory use requirements. Because the fluorine plastic is the high polymer materials, has absorbed a few touch with the characteristics of the gas, with the rise of temperature, the data volume swell, increased space between molecules, saturated absorption is increased. As long as the appropriate add thickness talents cuts to soak. Therefore, when the fabric layer planning, choose add thickness to compensate for this shortcoming.

by experimental verification, concluded that the fabric thickness delta 2 mm or more appropriate. And with the increase of the size of the pump and the density of adding fluorine plastic should choose 2. 16 g/cm3, impurities and do not allow to have the original data. Used in food, medicine, sanitary valve fabric material, should also be non-toxic, sterile, no impurity cleaning and hygiene information. The appearance of fluorine plastic valves should be lubricated, porosity, crack, mixed and other shortcomings. Flange flanging place and other corner should be uniform color, no efflorescence phenomenon. Large diameter fluorine plastic centrifugal water pump can choose steel plate welding method, welding point with GB/T150 standard rules. The internal shape of fluorine plastic centrifugal pump should as far as possible concise, easy to fabrics and mould manufacturing, shell lining surface should be smooth, all the corner should be a circular arc transition, arc radius R 2 mm or more.

fluorine plastic centrifugal chemical water pump parts shell by welding on the surface of the lining should be after welding, and selects the butt weld. Shall not use spot welding and continuous welding. More may not choose riveting. Welds shall be flat, weld projection 0 or less. 5 mm weld shall have porosity, bite side holes, cracks, and any other way appearance and lack of penetration defects. Not qualified, it can be mended. After the repair should still agree with the above requirements. The lining surface welding slag, spatter and other similar stuff should be thoroughly cleared; Fluorine plastic centrifugal pump of machining, welding and other processes it is necessary to end before the fabric; Fabrics before, should press GB11373 specification level St2 derusting processing requirements; Flange surface fabric should be lined with sealing surface, and has a fastening structure of matrix, and avoid shell; Fabric thickness using the thickness gauge testing, also can use caliper, micrometer, measure, its surface fabric thickness shall not be lower than the rules of table 1, fluorine plastic centrifugal pump parts should be spark detection, choose 5 kv ~ 20 kv high frequency electric spark detector, the output voltage, switch to the corresponding voltage, generally by 10 ~ 15 kv, thin fabric layer according to 10 kv, thicker by 15 kv, generally does not surpass 15 kv. Fluorine plastic centrifugal pump is generally not as a vacuum pump is applied, such as vacuum with or adjust with the user needs to do, it is necessary to ShangXie by both parties of supply and demand. Planning and special structure, before delivery, in addition to the pressure experiments, spark test, wall thickness and appearance check, should also be vacuum examination. To ensure that the fluorine plastic centrifugal pump under the pressure of promise, don't attack sucked flat fabric layer, such as flexure deformation instability phenomenon. Test probe in the fabric appearance moving at a speed of not exceed 50 mm/s. Breakdown for qualified by inspecting, testing instrument a succession of operation shall not exceed 50 minutes

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