As a precision mold manufacturer, let's take a look at its technical requirements.
Method adaptation
For example, in sand casting, mass production factories should create conditions to adopt technologically advanced modeling and core-making methods. The old-fashioned shock-type or shock-type molding machine production line is not high enough in productivity, the labor intensity of the workers is large, the noise is large, and it is not suitable for the requirements of mass production, so it should be gradually reformed. For small castings, a boxless high-pressure moulding machine production line with horizontal or vertical parting can be used. The production efficiency of solid moulding is high and the area is small; for middle parts, various boxed high-pressure moulding machine production lines and gas can be used. Molding line to meet the requirements of fast, high-precision molding production line, core-making methods can be selected: cold core box, hot core box, shell core and other high-efficiency core-making methods.
Medium-volume large castings can consider the application of resin self-setting sand molding and core making.
For heavy castings produced in small batches of a single piece, manual modeling is still an important method. Manual modeling can adapt to various complex requirements and is more flexible, and does not require a lot of process equipment. Water glass sand molds, VRH water glass sand molds, organic ester water glass self-hardening sand molds, clay dry molds, resin self-hardening sand molds and cement sand molds can be used; for single-piece heavy castings, the pit molding method is used for low cost and put into production quick. Mass production or long-term production of shaped products adopt multi-box modeling and split-box modeling. Although the initial investment in molds and sand boxes is high, it can be compensated by saving modeling man-hours and improving product quality.
Low pressure casting, die casting, centrifugal casting and other casting methods are only suitable for mass production due to the expensive equipment and molds.
Condition method should be suitable
For example, the same production of large-scale machine bed and other castings generally adopts the core assembly method, instead of making the pattern and sand box, the core is assembled in the pit; while in other factories, the sand box modeling method is used to make the pattern. Different companies have different production conditions (including equipment, site, staff quality, etc.), production habits, and accumulated experience. According to these conditions, we should consider what products are suitable and what products are not suitable (or not).