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Comprehensive analysis of the quality of the resin grinding wheel
Update Time:2012-1-27 Hits: [ Close ]On the basis of my many years of experience in production technology, but also to talk about the causes and measures the resin grinding wheel waste exchange with you.
1 does not match the material particle size, hardness does not match. Measures: strict accordance with the calculation of a single ingredient ingredients, the review process is the key;
2 mixed. Before mixing with the mixing process, with the clean clothes into the apparatus. Ingredients before checking whether the impurities of raw materials;
3 mixing inequality. Mixing time mixing according to process requirements. Always wear too much mixer replacement parts. Powdered resin material according to the process requirements of the screen number and frequency of screening;
4 organization uneven uneven uneven hardness. Adjust the humidity of the mixture, it has a good formability. By sharing material and process requirements for operation of scraper. According to process requirements first with horns and maintain presses accuracy; feed material scraper when the spread unevenly, mixing wet, or the material forming groups, feeding inequality, die wear, leaks the material seriously, need to replace the mold;
5 hot cracks forming green body temperature, thermal shock products, off-type core temperature is too low, should be de-core type, raw materials, moisture deterioration, or compounding errors
5.1 crack face. Molding material plasticity is poor, improper discharge mode to take blanks. Mold bottom plate is not parallel to the degree of uneven or too much.
5.2 around the crack. Die sets were badly worn when unloading module sets, too skewed.
5.3 aperture crack. Blank intensity is low, too much vibration when unloading modulus, taper mandrel wear is too big or too small, the order does not match the process requirements unloading mode.
5.4 pairs of corner cracks selection of spring horn, leaving the mold deflection elastic pressure produced inconsistent diagonal pattern. Liaoduo fine abrasive to suppress too fast to maintain the pressure a short time, die gap is too large.
5.5 crack prevention measures: speed good mixture of plasticity, forming tooling wear shall not exceed the prescribed standards, templates and horn good flatness, use the same thickness of the horn, the horn of the elastic spring to be consistent, unloading process model according to the provisions of the order;
6 both ends of the surface is not parallel to Keep the press to suppress Taiwan's precision, operating according to process requirements;
7 the surface uneven. Tooling equipment maintenance within the required accuracy;
8 forming the hardness does not match. The first piece will suppress the seizure, each consisting of not less than 30% of the sampling blanks, always check weighing unit weight, and often observe whether the changes in pressure;
9 Bridge shocked uneven. Cooling required uniform; workpiece surface "warping" There is no flat surface is called the bridge was shocked. This is due to uneven cooling contraction of i
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