Understanding the advantages of cast iron ground rails When selecting the location and number of inner gates, in addition to considering the solidification principles required by the casting itself, the following principles should also be considered. It is beneficial for the solidification and feeding of cast iron ground rails. For cast iron ground rails that require simultaneous solidification, inner gates should be set at the thin-walled parts of the casting, with a large number and dispersed arrangement, so that the molten metal can quickly and evenly fill the mold cavity, avoiding local overheating of the sand mold near the inner gates.
Laboratory cast iron ground rails are used for motor test platforms of large equipment, featuring rational design, stable structure, wear resistance, etc. Single pieces range from 3000mm to 8000mm, and plates larger than this specification can be spliced for use. The products are made by scraping or grinding.
Be sure to first clean the worktable with non-corrosive gasoline, then carefully wipe it with degreased cotton gauze, and then use it. During use, it is essential to measure the level of the platform with a level instrument to ensure that the weight of the engine on the test cast iron ground rail is evenly distributed across all support points.
Use with care to minimize bumps and impacts to avoid unnecessary losses. After use, clean the platform promptly and thoroughly to keep it clean and dry, which helps extend the inspection cycle of the platform.
The bottom-pouring inner gate of the cast iron ground rail connects it to the cast iron ground rail to facilitate molding operations. This type of gating system fills the mold steadily, favors directional solidification, and helps obtain castings with dense structures. However, the molding process is relatively complex, metal consumption is high, and cleaning is difficult. It is suitable for small, high-demand non-ferrous alloy castings and cast steel pieces, as well as some tall cast iron solid parts and vertically parted castings.

Cast iron ground rails, also known as base plates, are used for motor test platforms of large equipment, featuring rational design, stable structure, wear resistance, etc. Single pieces range from 3000mm to 8000mm, and plates larger than this specification can be spliced for use. The products are made by scraping or grinding. They are widely used in machining, tool and workshop applications, machine (inspection) repair workshops, large equipment bases, metrology rooms, and precision machining inspections, measuring and grinding, performance measurement, inspecting the flatness, straightness, and angular tolerance of workpieces. The working surface of cast iron ground rails should not have rust, scratches, bumps, or other appearance defects that affect use.
The design of the gating system for cast iron ground rails is based on factors such as the casting material, structure, quality, mold conditions, and pouring conditions to determine the type, structure, and dimensions of the gating system. Through the design and calculation of the gating system, it ensures that the molten metal fills the mold cavity within a suitable pouring time, controls the rise speed of the molten metal, improves casting quality, and reduces metal consumption.
Determination of pouring time The time from when the liquid metal begins to enter the mold until it fills the mold is called the pouring time, denoted as t. For castings that require sequential solidification, inner gates should be set at the thick-walled parts of the casting. Vertical slot gating system. The vertical slot gating system is a special form of the stepped gating system. Since the inner gates of the stepped gating system are not easy to demold during molding, the larger cross-section sprue and multi-layer inner gates are replaced with a typical vertical slot intermediate injection gating system.
Factors affecting pouring time include the type of alloy, pouring temperature, type of gating system, casting structure (wall thickness, size, complexity, etc.), and type of mold. Currently, pouring time is mainly determined by empirical formula calculations and referencing empirical data. Calculation of pouring time for cast iron ground rails. Empirical formula for calculating the pouring time of gray cast iron.
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