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                            Chaoyang casting increased the strength of coated sand casting
                            作者:  來源: http://www.evvww.com/gsdt/n618.html   發布時間:2014-12-20
                            Bao chao foundry specializing in coated sand casting, resin coated sand casting parts, cast steel factory of precoated sand, machinery casting parts, precision casting, precision casting, hammer hammer solid drill bit, cross bit, cross centrifuge tube production and sales, the company production of coated sand casting, resin coated sand casting parts, cast steel factory of precoated sand, sold at home and abroad, welcome to inquire: 13932262815. Chaoyang casting increased the strength of coated sand casting, the method is as follows.

                            1. Improve the tensile strength: adjusting the relative molecular mass of resin can add additives.

                            2. Improve the hardening speed: resin synthesis improvement, add a hardening agent.

                            3. Reduce the thermal expansion of precoated sand: adding plastic molecules in the synthesis of resin, plasticizer, added to the coated sand used special sand.

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