Gating system for stamping cylinder

Abstract

The invention discloses a gating system for a stamping cylinder. The gating system comprises a pouring basin (1), a sprue (2), an upper cross gate (3), a lower cross gate (4), inner pouring heads (5), and a sand mold (6) which are connected sequentially along the flowing direction of molten iron; the sand mold (6) consists of a sand mould and a cavity; the sprue (2) is divided into at least two buffer sprues; and a first buffer cross gate (10) is arranged between adjacent buffer sprues. The molten iron can be poured stably, secondary oxidation caused by splashing is avoided, the molten iron scummings can be filtered, and the influence of sand removal on a casting is avoided. The gating system belongs to the technical field of casting processing.

Description

technical field [0001] The invention belongs to the technical field of casting processing, and in particular relates to a gating system of a stamping cylinder. Background technique [0002] Most of the existing stamping cylinder product castings are large-scale products with a cylindrical structure. For example, the unit weight of an existing casting is 5800Kg, the pouring weight of the casting is 8000T, the main wall thickness is about 75mm, and the maximum wall thickness is 160mm. The overall dimensions are 4485mm high x 740mm high. Therefore, the pouring weight is relatively large, and the requirements for the pouring system are relatively high, especially in terms of slag retention and exhaust. The gating system of the existing stamping cylinder includes sprue basins, sprues, upper runners, lower runners, single ingates, sand molds connected in sequence according to the direction of molten iron flow. The sand molds include sand molds and Cavity, its working process is...

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Problems solved by technology

[0003] 1. Due to the high height of the entire gating system and the large vertical drop, the molten iron in the existing gating system directly enters the upper runner after passing through the sprue from the sprue basin. The flow rate of the molten iron is unstable, which can easily lead to Liquid splashing, causing secondary oxidation of molten iron, affecting defects such as shrinkage and porosity inside casting products

[0004] 2. The pouring system is not equipped with molten iron scum filter, and the radial setting of the outlet of the molten iron in the ingate channel is not conducive to the floating of the scum mixed in the molten iron during the pouring process, resulting in too many scum pores on the surface of the casting, which eventually leads to Casting scrap

[0005] 3. Since the molten iron in the gating system of the stamping cylinder in the prior art flows through the ingate channel and directly impacts the sand mold of the cavity radially (laterally), it is easy to form sand washing, which easily causes sand to mix into the molten iron, eventually causing There are shrinkage cavity defects inside the casting

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