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CN-121972635-A - High-pressure modeling high-heating riser with fixing mechanism

CN121972635ACN 121972635 ACN121972635 ACN 121972635ACN-121972635-A

Abstract

The invention relates to the technical field of casting, in particular to a high-pressure modeling and high-heating riser with a fixing mechanism, which comprises an outer shell layer, a heat preservation layer and a first heating agent packet, wherein the outer shell layer is of an inverted truncated cone-shaped hollow structure, openings are formed in the upper end and the lower end of the outer shell layer, the heat preservation layer is positioned on the inner wall of the outer shell layer, an isolation pipe is arranged at the top end of the outer shell layer, the upper end of the isolation pipe is fixedly connected with the outer shell layer and is positioned at a concentric position with the opening in the upper end of the outer shell layer, a circulation opening is formed in the upper side of the isolation pipe, a gap is reserved between the lower end of the isolation pipe and the outer shell layer, so that molten metal can flow from the gap.

Inventors

  • LU JIANHUA
  • GU XUEMING
  • FENG XIAOYING
  • DAI LINGKAI

Assignees

  • 常州钜苓铸造有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (7)

  1. 1. The high-pressure modeling high-heating riser with the fixing mechanism is characterized by comprising the following components: The heat insulation device comprises a shell layer (1), a heat insulation layer (2), a guide rod (8) and a first thermal agent bag (3), wherein the shell layer (1) is of an inverted truncated cone-shaped hollow structure, openings are formed in the upper end and the lower end of the shell layer (1), the heat insulation layer (2) is positioned on the inner wall of the shell layer (1), the first thermal agent bag (3) is positioned on the inner wall of the heat insulation layer (2), and the guide rod (8) is inserted into the shell layer (1); The metal liquid casting device is characterized in that an isolation pipe (4) is arranged at the top end of the outer shell layer (1), the upper end of the isolation pipe (4) is fixedly connected with the outer shell layer (1) and is in a concentric position with an opening at the upper end of the outer shell layer (1), a circulating opening (41) is formed in the upper side of the isolation pipe (4), and a gap is reserved between the lower end of the isolation pipe (4) and the outer shell layer (1) so that metal liquid can flow from the gap.
  2. 2. A high pressure modeling high heating riser with fixing mechanism as set forth in claim 1, wherein the circulation port (41) is concave.
  3. 3. The high-pressure modeling high-heating riser with the fixing mechanism according to claim 2, wherein a second thermal agent bag (5) is arranged at the top end in the outer shell layer (1), and the second thermal agent bag (5) is arranged in a ring shape and is positioned outside the isolation tube (4).
  4. 4. The high-pressure modeling and high-heating riser with the fixing mechanism according to claim 3, wherein the outer surface of the second thermal agent bag (5) is completely wrapped and sealed by a layer of metal foil diaphragm (6) with a specific melting point, and the metal foil diaphragm (6) is solid at normal temperature and isolates the second thermal agent bag (5) from the external environment.
  5. 5. The high-pressure modeling high-heating riser with the fixing mechanism as claimed in claim 4, wherein the inner wall of the lower end of the outer shell layer (1) is upwards protruded, so that an acute included angle is formed between the lower end face and the side face of the inner part of the outer shell layer (1).
  6. 6. The high-pressure modeling and high-heating riser with fixing mechanism as claimed in claim 5, wherein the outer side wall of the insulating tube (4) is coated with a high-temperature refractory coating (42) in which active material particles capable of serving as heterogeneous nucleating agents are uniformly dispersed.
  7. 7. The high-pressure modeling high-heating riser with the fixing mechanism, which is disclosed in claim 6, is characterized in that an expansion rod (7) is arranged in the lower end of the outer shell layer (1), and the expansion rod (7) is obliquely arranged.

Description

High-pressure modeling high-heating riser with fixing mechanism Technical Field The invention relates to the technical field of casting, in particular to a high-pressure modeling high-heating riser with a fixing mechanism. Background In the solidification process of the casting, liquid shrinkage and solidification shrinkage of the metal liquid can occur, if the external metal liquid cannot be timely supplemented, defects such as shrinkage cavities, shrinkage porosity and the like can be generated at the hot joint part of the final solidification of the casting, and the mechanical property and compactness of the casting are seriously affected; The riser is a prefabricated cavity in a casting mold, the core function of the riser is to store high-temperature molten metal, continuously feed the molten metal and introduce defects into the riser during the solidification process of a casting, the complete riser system generally comprises a riser sleeve, a riser seat and a fixing mechanism, the riser sleeve is used as a main body of the riser, is a prefabricated heat-insulating or heating material sleeve, and has the functions of greatly delaying the solidification speed of the molten metal in the interior and improving the feeding efficiency, and the riser seat is a pit structure which is formed on the surface of a sand mold during the molding and is used for positioning and placing the riser sleeve, and the shape of the pit structure is matched with the bottom of the riser sleeve, so that the installation precision is ensured and the stable support is provided for the riser sleeve; The high-heating riser is generally provided with a thermite package and a heat preservation layer in the riser sleeve, the thermite package burns and heats after contacting molten metal, the molten metal is heated, the heat preservation layer plays a role in heat preservation, the solidification speed of the molten metal in the riser sleeve is slowed down, however, smoke and slag can be generated when the thermite package burns, the slag can enter a casting, the quality of the casting is affected, and further limitation is caused. For this purpose, we propose a high pressure modeling high exothermic riser with a fixing mechanism. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a high-pressure modeling high-heating riser with a fixing mechanism, which overcomes the defects of the prior art and aims at solving the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme that the high-pressure modeling high-heating riser with the fixing mechanism comprises: The heat insulation device comprises an outer shell layer, a heat insulation layer, a guide rod and a first thermal agent bag, wherein the outer shell layer is of an inverted truncated cone-shaped hollow structure, openings are formed in the upper end and the lower end of the outer shell layer, the heat insulation layer is positioned on the inner wall of the outer shell layer, the first thermal agent bag is positioned on the inner wall of the heat insulation layer, and the guide rod is inserted into the outer shell layer; the top end of the shell layer is provided with an isolation pipe, the upper end of the isolation pipe is fixedly connected with the shell layer and is in a concentric position with the opening at the upper end of the shell layer, the upper side of the isolation pipe is provided with a circulation opening, and a gap is reserved between the lower end of the isolation pipe and the shell layer, so that molten metal can flow from the gap. Preferably, the circulation port is concave. The setting of isolating pipe lets molten metal circulate in the shell layer, with the buoyancy interact of slag self, can play the effect of accelerating slag upward movement to reduce because of slag come-up speed is slow, the slag appears along with the molten metal in the shell layer together to the condition in the foundry goods. Preferably, the top end in the outer shell layer is provided with a second thermal agent packet, and the second thermal agent packet is arranged in a ring shape and is positioned outside the isolation tube. Preferably, the outer surface of the second thermal agent packet is completely wrapped and sealed by a layer of metal foil diaphragm with a specific melting point, and the metal foil diaphragm is solid at normal temperature and isolates the second thermal agent packet from the external environment. By providing a second hot pack above the outer shell layer, the second hot pack heats the top of the molten metal creating a high temperature zone to accumulate slag, thereby ensuring that all floating slag is effectively collected, concentrated and safely isolated in the final zone away from the castings and feed channels. Preferably, the inner wall of the lower end of the outer shell layer is raised upwards, so that an acute included angle is formed between the l