Device for preventing roller casting from generating shrinkage cavities

Abstract

The invention discloses a device for preventing a roller casting from generating shrinkage cavities. The device comprises a riser, wherein clamping frames matched with the riser are arranged on two sides of the riser, the clamping frames have radians matched with the radian of the riser, the cross section of each clamping frame is horizontal-n-shaped, a functional groove is formed in each clampingframe and is matched with the clamping frame, plastic frit is arranged in the functional grooves, the plastic frit is made of a polypropylene material, a plurality of adjusting rods are arranged in the functional grooves in a penetrating mode, a plurality of auxiliary grooves are formed in the sides, away from the riser, of the interior of each clamping frame, the side, which is away from the riser, of each clamping frame is provided with a clamping plate matched with the clamping frame, and a plurality of connecting positioning rods matched with the corresponding auxiliary grooves are arranged on the side, close to the riser, of each clamping plate. The device has the beneficial effects that the device can well limit shrinkage cavities, the riser can be accurately positioned well, so that the operation stability is guaranteed, and liquid high-temperature metal can be in an environment of which the temperature is close to a constant temperature.

Description

technical field [0001] The invention relates to the field of roll castings, in particular to a device for avoiding shrinkage cavities in roll castings. Background technique [0002] Shrinkage cavity refers to the macroscopic void defect caused by the shrinkage of the top of the casting when the ingot is poured and other castings are solidified. If the shrinkage cavity is not cleared, wrinkles or holes will be formed in the center of the section after the ingot is rolled into a profile, and there will often be serious looseness, partial core and accumulation of oxygen content near it. This will seriously affect the quality of the material, and cause excessive deformation or fracture accidents of engineering components. In order to prevent shrinkage cavities, many methods are generally adopted, using risers or starting from materials, and using risers is more convenient to use. According to the Chinese patent No. CN201482934U, announced a kind of device that avoids roll casti...

AI Technical Summary

Problems solved by technology

This will seriously affect the quality of the material, and cause excessive deformation or fracture accidents of engineering components. In order to prevent shrinkage cavities, many methods are generally adopted, using risers or starting from materials, and using risers is more convenient to use. According to the Chinese patent No. CN201482934U, announced a kind of device that avoids roll casting to produce shrinkage cavity, it can improve feeding efficiency, make casting structure dense, without porosity, shrinkage cavity, quality improves greatly, but when using hole to avoid shrinkage cavity generation, Because the riser acts as a compensation for the gap at the end, it is easy to produce a change in position, and because the liquid high-temperature metal is difficult to maintain a constant temperature even in the riser, this will result in more places for the riser to be cut, and the liquid The utilization rate of the metal will also decrease. In addition, because of the use of the riser, the riser is relatively brittle as a whole, which leads to collapse and fragmentation at the bottom of the riser without good support. Or in the case of deformation, the bottom of the riser has high temperature, and it is easy to lose temperature, and it cannot have a plastic film that can be coated to increase the heat preservation and the overall strength and toughness of the riser.

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