Large plastic die steel polishability inspection method

Abstract

The invention discloses a large plastic die steel polishability inspection method, and aims to judge whether the polishability is qualified or not in advance, provide a basis for die material selection, prevent the problems and reduce the die manufacturing cost investment. A polishing region: a square region with the area of 100 mm*100 mm is selected in the end center of a riser. Polishing steps include: (1) rough polishing, wherein saw cutting marks are polished smoothly; (2) semi-fine polishing, wherein100 #-1000 # abrasive paper is sequentially selected for semi-fine polishing; (3) fine polishing, wherein polishing paste is evenly smeared on the polishing surface of steel, and a wool felt grinding head is used for polishing till no obvious macroscopic polishing marks exist on the polishing surface; (4) wiping, wherein residual dirt on the polishing surface is wiped away by using sheepskin cloth wetted with anhydrous alcohol; and (5) judging in three grades. The inspection method hasthe advantages that the inspection method is convenient and effective, an important basis is provided for die material selection, and the cost investment of die manufacturers is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel inspection, and in particular relates to a method for inspecting the polishability of large plastic mold steel. Background technique [0002] The traditional mold manufacturing process is: material selection-milling-rough machining-finishing-wire cutting, EDM-polishing, the processing process is very complicated, and the processing cost of plastic mold steel materials accounts for more than 60% of the entire mold manufacturing cost . If the polishing ability cannot be well judged before the mold is manufactured, after a large amount of manpower, material and financial resources are invested to process the mold into a finished product, a large number of "pockmarks" will be found on the polished surface and cannot be used, or it is difficult to ensure the use even if it is repaired by welding. The life span will cause a lot of waste, especially for large plastic molds. The cost of a set of m...

AI Technical Summary

Problems solved by technology

[0002] The traditional mold manufacturing process is: material selection-milling-rough machining-finishing-wire cutting, EDM-polishing, the processing process is very complicated, and the processing cost of plastic mold steel materials accounts for more than 60% of the entire mold manufacturing cost

If the polishing ability cannot be well judged before the mold is manufactured, after a large amount of manpower, material and financial resources are invested to process the mold into a finished product, a large number of "pockmarks" will be found on the polished surface and cannot be used, or it is difficult to ensure the use even if it is repaired by welding. It will cause a lot of waste, especially for large plastic molds. The cost of a set of molds is as high as millions, which greatly increases the cost of mold manufacturing.

After the mold is polished, if there are a lot of "pitting" defects on the polished surface, it will cause "small bumps" on the surface of the plastic product, which will affect the appearance of the plastic product, and in severe cases will lead to the scrapping of the product

At present, there are no inspection methods and standards for mold steel polishability in China, and even international standards have no clear instructions, so it is imminent to explore a large-scale plastic mold steel polishability inspection method

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