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CN-117020115-B - Integral casting process of water ring type vacuum pump

CN117020115BCN 117020115 BCN117020115 BCN 117020115BCN-117020115-B

Abstract

The invention relates to the technical field of casting, in particular to an integral casting process of a water ring type vacuum pump, wherein a molding device adopted by the process comprises a sealing cover, an extrusion plate, a hydraulic cylinder, a base plate, a sliding block, an optical axis and an optical axis seat, the other end of each sand box is connected with the sealing cover, the top of the sealing cover is provided with a feed inlet, the inner wall of the sealing cover is matched with the extrusion plate, the extrusion plate is connected with the output end of the hydraulic cylinder, the hydraulic cylinder is fixed at two sides of the base plate, the bottom of the sand boxes is detachably arranged on the sliding block, the bottom of the sealing cover is fixedly arranged on the sliding block, the sliding block is slidably arranged on the optical axis, and the optical axis bases are fixedly arranged at the two ends of the optical axis.

Inventors

  • HU GUOXIAN
  • ZHAO CHUNHUI
  • Lu Yuwang

Assignees

  • 江苏大田阀门制造有限公司

Dates

Publication Date
20260512
Application Date
20230811

Claims (6)

  1. 1. S1, putting raw sand into a sand mixer, then extruding, grinding and kneading the raw sand, after waiting for 3-5 minutes, adding an additive, continuously rotating to continuously roll and mix the raw sand, fully mixing the raw sand with the additive, uniformly and fully wrapping the raw sand by the additive, waiting for the sand mixer to work for 6-12 minutes to form molding sand, and taking the molding sand out of a discharge hole; S3, pouring molten alloy liquid into the casting mould, forming the casting by the casting mould, taking out the casting mould to cool naturally to 200 ℃ after the measured temperature value is measured, carrying out simple processing and polishing after sand casting is cleaned after the casting is cooled, and then finishing after the quality of the casting is checked, wherein the molding device comprises a sand box, a mold, a sealing cover, an extrusion plate, a hydraulic cylinder, a base plate, a sliding block, an optical axis and an optical axis seat, wherein the hydraulic cylinders are fixedly arranged on the inner walls of two sides of the base plate, the extrusion plate is mutually matched with the inner walls of the sealing cover, the top of the sealing cover is provided with the feed inlet, one end of the sealing cover, which is far away from the hydraulic cylinder, is mutually matched with the sealing cover through magnetic attraction, the mold is arranged between the two sand boxes, the two sand boxes are provided with a plurality of optical axis seats for mutually matched with the base plate fixedly arranged on the base plate, the optical axis is fixedly installed between two optical axis seats, a plurality of sliding blocks are sleeved on the outer surface of the optical axis in a sliding manner, sand boxes are detachably installed at the tops of the sliding blocks, sealing covers are fixedly installed at the tops of the sliding blocks, supporting seats are fixedly installed on a base plate, holes for supporting the optical axis and enabling the optical axis to pass through are formed in the middle of the supporting seats, guide rails are fixedly installed at the tops of the supporting seats, a mold is slidably installed on the guide rails, a positioning device for enabling the mold to be fixed at a working position is fixedly installed at one end of each guide rail, a plurality of buckles are fixedly installed on the outer wall of each sand box, the two sand boxes are fixedly spliced through the mutual matching between the buckles, grooves matched with the buckles are formed in the side edges of the mold, a plurality of spring buckles are installed on the top wall of the extruding plate, and a plurality of small holes matched with the spring buckles are formed in the top wall of the sealing covers.
  2. 2. The integral casting process of the water ring type vacuum pump of claim 1, wherein the positioning device comprises a positioning block (12), a first magnet (13) and a second magnet (14), the positioning block (12) is fixedly arranged at one end of the guide rail (11), the first magnet (13) is fixedly arranged on the positioning block (12), and the second magnet (14) matched with the first magnet (13) is fixedly arranged below the side edge of the die (2).
  3. 3. The integral casting process of the water ring type vacuum pump, as claimed in claim 1, is characterized in that the base plate (6) is provided with collecting grooves below the joint of the sealing cover (3) and the sand box (1), and a collecting box (17) is detachably arranged in each collecting groove.
  4. 4. The integral casting process of the water ring vacuum pump as claimed in claim 1, wherein handles (18) are fixedly arranged at the bottoms of two sides of the sand box (1).
  5. 5. The integral casting process of the water ring vacuum pump as claimed in claim 1, wherein rubber rings are fixedly arranged on the side edges of the extrusion plates (4).
  6. 6. The integral casting process of the water ring vacuum pump as claimed in claim 1, wherein the volume of the inner cavity of the sealing cover (3) is larger than that of the sand box (1).

Description

Integral casting process of water ring type vacuum pump Technical Field The invention relates to the technical field of casting, in particular to an integral casting process of a water ring type vacuum pump. Background The casting is a metal hot working process which is relatively early mastered by human beings, and is a working mode of pouring solid metal into a casting mould with a specific shape in a liquid state and solidifying and forming the casting mould, while the casting water ring type vacuum pump at present usually adopts a sand casting process, and the sand casting is a casting method for producing castings in a sand mould. Steel, iron and most nonferrous alloy castings are obtained by sand casting methods. Because the molding materials used for sand casting are cheap and easy to obtain, the casting mold is simple and convenient to manufacture, and is suitable for single-piece production, batch production and mass production of castings, and is a basic process in casting production all the time. In the casting process of the water ring vacuum pump, the molding is a key step of the casting process, the molding method is divided into manual molding and machine molding, a small-scale molding machine is generally adopted in some factories at present to finish the molding process, the small-scale molding machine at present can only mold a single sand box at a time, after the molding of the single sand box is finished, the sand box needs to be manually detached, then the mold is turned over, the empty sand box is reinstalled, molding sand is filled into the interior, and then the other surface is molded, and after the molding process is finished, the two sand boxes need to be manually carried, spliced and fixed together, so that the efficiency is low. Therefore, the integral casting process of the water ring type vacuum pump is provided, the molding device can simultaneously mold the internal molding sand by the two sand boxes, and after the molding process is finished, the two sand boxes can be quickly and labor-effectively spliced and fixed together, so that the efficiency is improved, and the labor is saved. Disclosure of Invention The invention aims to provide an integral casting process of a water ring type vacuum pump, which can simultaneously mold the internal molding sand of two sand boxes through a molding device, so as to solve the problems that the existing molding device can only simultaneously mold a single sand box and has lower efficiency. In order to achieve the above purpose, the invention provides the following technical scheme that the integral casting process of the water ring vacuum pump comprises the following steps: s1, putting raw sand into a sand mixer, extruding, grinding and kneading the raw sand, adding an additive to continuously rotate and mix the raw sand, fully mixing the raw sand with the additive, uniformly and fully wrapping the raw sand by the additive, waiting for the sand mixer to work for 6-12 minutes to form molding sand, and taking the molding sand out of a discharge hole; s2, placing the mixed molding sand into a feed port of a molding device, then starting the molding device to compact the molding sand from the left side and the right side to form a cavity of a casting, manually splicing and fixing the molding sand together to form a casting mold, and carrying the casting mold to a pouring port of a smelting furnace after the casting mold is solidified and molded; And S3, pouring the smelted alloy liquid into a casting mould, forming a casting by the poured alloy liquid through the casting mould, taking out the casting to rapidly cool when the casting is naturally cooled to a measured temperature value of 200 ℃, performing shakeout after the casting is cooled, cleaning sand grains on the casting, performing simple processing and polishing, and then inspecting the quality of the casting. Preferably, the molding device comprises sand boxes, dies, sealing covers, extruding plates, hydraulic cylinders, base plates, sliding blocks, optical axes and optical axis seats, wherein the hydraulic cylinders are fixedly installed on the inner walls of two sides of the base plates, the output ends of the hydraulic cylinders are connected with the extruding plates, the extruding plates are matched with the inner walls of the sealing covers, the tops of the sealing covers are provided with feeding holes, one ends of the sealing covers, far away from the hydraulic cylinders, are respectively connected with the sand boxes matched with the sealing covers through magnetic attraction, the dies are installed in the middle of two sand boxes, fixing grooves used for being matched and fixed with the sand boxes are formed in two sides of the dies, the bottoms of the sand boxes are respectively installed on the sliding blocks in a detachable mode, the bottoms of the sealing covers are respectively fixedly installed on the sliding blocks, the sliding blocks are respectively installed on