Core-making sand composition of warm core box and sand making method

A technology of composition and core sand, which is applied in the direction of cores, manufacturing tools, casting molding equipment, etc., can solve the problems of complex production process of white carbon black, reduce the activity of water glass, and low mechanical properties, so as to facilitate the organization of production and improve Effect of high working conditions and mechanical properties

Inactive Publication Date: 2015-03-25
SHENYANG HYATON FOUNDRY MATERIAL
View PDF14 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of white carbon black is complicated, the price is expensive, and the content of silica fume calcium and magnesium alkali metal oxides is high, which reduces the activity of water glass. Under the same amount of water glass added, the mechanical properties are low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1. 1000g water-washed sand in the paddock, Shenyang Huiyatong new water glass HYT-S-104, 20g, zirconium fumed silica 6g, mixed with a laboratory blade sand mixer, and combined the core (molding) sand The object is loaded into the sand cylinder, the standard "8" sample test mold is preheated at 150℃, and the core-making (molding) sand composition is injected into the standard "8" sample test mold with compressed air at 0.6Mpa. Under Mpa, blow the hot air of 120-150℃ into the standard "8" type sample experimental mold, the blowing time is 40s, open the box and take the core, make 10 sand cores, use the hydraulic testing machine to test the "8" type test The tensile strength of the sample is measured within 60s, and the average value of 5 samples is taken; the strength of the sample after cooling after 4h is tested, and the average value of 5 samples is taken. The immediate tensile strength is greater than 0.8Mpa, and the tensile strength after 4h is greater than 2....

Embodiment 2

[0021] Example 2. 1000g of Dalin water-washed sand, 20g of Shenyang Huiyatong's new water glass HYT-S-105, 6g of silica fume were mixed with a laboratory blade sand mixer to form the core (molding) sand composition 1; Dalin 1000g water-washed sand, Shenyang Huiyatong's new water glass HYT-S-105, 20g, zirconium vapor-phase silica 6g, mixed with a laboratory blade sand mixer, to form the core (molding) sand composition 2. Use the sand mixture fluidity measurement method recommended by "Casting Handbook. Modeling Material 4": side hole quality method to detect the fluidity of two core (molding) sand compositions, the sand composition with silica fume, and the flow of 1. The fluidity is 2.4-3.0g; the fluidity of the sand composition 2 with zirconium fumed silica is: 4.9-6.2g; the fluidity of the sand composition with silica fume is much lower than that of the sand with zirconium fumed silica The fluidity of the compound.

[0022] Sand mixing Put the core-making (molding) sand compos...

Embodiment 3

[0023] Example 3. 1000g of Dalin water-washed sand, 25g of Shenyang Huiyatong's new water glass HYT-S-104, 8g of zirconium fumed silica, were mixed with a laboratory blade sand mixer.

[0024] Sand mixing Put the core-making (molding) sand composition into the sand cylinder. The standard "8" sample test mold is preheated at 150℃, and the core-making (molding) sand composition is injected into the standard with compressed air at 0.6Mpa. 8" sample test mold, under 0.2Mpa, blow 120-150℃ hot air into the standard "8" sample test mold, blowing time 40s, open the box to take the core, make 10 sand cores, Use a hydraulic testing machine to test the tensile strength of the "8" sample, measure the instant strength within 60 seconds, and take the average value of 5 samples; test the strength of the sample after cooling after 4 hours, and take the average value of the 5 samples. The immediate tensile strength is greater than 0.8Mpa, and the tensile strength after 4h is greater than 2.8Mpa. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
fluidityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a core-making sand composition of a warm core box and a sand making method. The composition comprises an inorganic binding agent, raw sand and non-crystallization type silicon oxide. According to the preparation method, a sand mixing machine is used for mixing, preferably a continuous sand mixing machine is adopted; the raw sand, sodium silicate and the non-crystallization type silicon oxide are automatically controlled by a pc to be fed; after the core-making sand composition is mixed, and is added into a core shooting machine sand bucket; a core-making mold is heated to 145-155 DEG C in advance to prepare the core-making sand composition; the core-making sand composition is shot into a mold cavity by a core shooting machine under the air pressure of 0.4Mpa-0.7Mpa; hot air of 120-160 DEG C is blown into a core-making cavity for 20-200 seconds; a thin core is blown for 20-40 seconds and the air blowing time is properly prolonged by a thick core; after the sand core is hardened, the box is opened and the sand core is ejected out; and the sand core can be poured on the day by assembling the box, and also can be poured by assembling the box after being stored for 3-5 days. The composition has a wide source, a high mechanical property and cheap price; and popularization and application are facilitated, the composition has no toxin and odor, and the environment protection is facilitated.

Description

Technical field [0001] The invention belongs to the technical field of casting, and relates to a warm core box core-making composition and a core-making method. Background technique [0002] The current core-making technology includes: cold-box core-making, the mold does not need to be heated, and normal-temperature core-making; hot-core-box core-making with a core-making temperature of 180-250℃; coated sand core-making with a core-making temperature of 270-300℃. The above core-making technologies all use artificial synthetic resin as the binder, the production process is complicated, the price is high, the casting production process releases toxic and odorous gases, and the working conditions are poor, which endanger the health of the on-site personnel. [0003] In the prior art, the modeling material mixture in CN101027147A includes raw sand, water glass, and amorphous silica. The amorphous silica in the invention includes: precipitation method white carbon black, pyrolysis meth...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02B22C1/18B22C15/24
CPCB22C1/02B22C1/18B22C9/10
Inventor 金广明魏甲
Owner SHENYANG HYATON FOUNDRY MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap