Blank box molding sand is an important part, so how about the requirements of the blank has, will affect the use of the effect, 1) rough casting sand box size deviation, wall thickness deviation according to GB / T6414-1999 casting dimensional tolerances specified level of selection. There are special requirements for the size of the deviation, sand box sales, should be separately identified. 2) machined separately handle, hanging shaft, or inserted into the rings cast housing portion and the box should tighten the connection, do not allow loose and influential defect intensity. 3) should cast the mark on the flask. Special sandbox can cast the part number, sand box drawing number, can be cast by a sand box sand inside the box factory × width × height dimensions. 4) eliminate internal stress treatment, post-treatment retention of flex and deform, should be within the scope of the allowance, sand box manufacturers, exceed those allowed to be corrected with special means for clamping 5) sand box , sand box under wedge blocks, which shift and deviation should not exceed the specified size requirements. Source: blank is an important part of the flask shaped flask use and repair 1) sand box should be carefully checked before use key parts box shaft, rings, box angle, the tank wall, etc., found that splitting, damage, etc. should stop use. 2) For steel, cast iron in the sand box, Zibo sand box, the length of the direction of the wall deformation, allowing no more than partial to expand outwardly 15mm, inwardly no more than 8mm. High pressure and Chute sand box is not included. 3) When the dowel holes, positioning sleeve bore wear amount exceeds the limit, allowing inlay repair, but no more than twice; high-pressure molding machine positioning flask sleeve bore wear limit must not exceed ± 0.2mm: according to the product conditions different, the wear limit can be appropriately enlarged or reduced. Sand box price _ Dragon Industrial (certified) _ Shandong Zibo dragon sandbox provided by the Industrial Development Company Limited. Shandong dragon Development Co., Ltd. (www.julongshiye.com/) Shandong Weifang, machining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders at the dragon with the staff warmly welcome all inquiries negotiations to create a better future dragon Industry.