NEWS

Introduction of Cast Steel Anchor Production Process

At present, the most widely used casting process is wood mold casting. The process is as follows:

1. Wood mold processing---The wood must be dried naturally or artificially before use. It must meet the local high moisture condition, and the total moisture content is less than 10%. The wood mold must be manufactured according to the requirements of the drawings, and has sufficient strength, Surface finish and certain precision, the wood used for making the wood mold should be tough and wear-resistant, not easily deformed, and should be soft and easy to process, and the surface of the processed wood should be smooth and easy to demould. After the wooden mold is made, the surface should be painted with varnish and shellac paint, and the wear-resistant layer should be painted to increase the wear resistance of the wooden mold, which is convenient for the wooden mold to be used multiple times and easy to store. After the wooden mold is made, if you want to cast an anchor of the same specification in the future, you only need to reuse the mold of this specification.

2. Sand casting---The raw material of the sand mold is mainly sand, and the binder and water are added. The mixed sand mold material should have a certain bond strength to prevent the sand mold from collapsing by being washed by high-temperature molten iron. Note that the high-temperature molten iron has a certain shrinkage rate after condensation, so the size of the wood mold should be increased according to the shrinkage rate compared to the size of the original casting, and the parts that need to be cut should be thickened, so the anchor delivery weight can be allowed to allow -3 % to +7% tolerance.

3. Pouring --- After the sand mold is made, the removal position of the wooden mold should be considered, and the position of the molten steel pouring should also be considered to avoid affecting the structure of the anchor. The pouring process is to pour the molten steel into the cavity of the sand mold, and the molten steel is in the cavity. It will condense and form. The casting of main components such as anchor rod and anchor head is generally made of ZG230-450H and ZG200-400C materials.

4. Desanding, grinding, etc. --- After forming the casting anchor, de-sanding is carried out, and the burrs, spills and other parts formed at the joint part of the sand mold are polished.

5. Dipping and assembling---The dipping of the anchor should be completed before the assembling of the anchor, so that all parts of the anchor can be covered with asphalt paint, and the assembly work can be carried out after the anchor dipping paint is dry.