Lost foam full mold casting process

A technology of solid mold casting and lost foam, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of increasing the complexity of process operations, reducing production efficiency, affecting the quality of castings, etc., to improve the working environment and production conditions. , reduce labor intensity and achieve the effect of mass production

Active Publication Date: 2020-04-10
ANHUI SOLID FOUNDRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing lost foam casting process has insurmountable problems due to equipment cost investment, foam pattern mold (white mold) manufacturing, coating process, pouring process and other technologies: 1. White molds need to be manufactured in the lost foam casting process, white molds It is easy to deform during the manufacturing process (such as: the pre-expansion density of polystyrene beads is small, and the white mold is deformed by external forces such as water pressure during demoulding); If the coating is complete and exposed, sand will stick to it during casting; 3. There is a blind area for sand filling in the white mold; 4. During casting, a. Generally, th...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A lost foam full mold casting process is characterized in that it comprises the following steps:

[0034] Step S1, selection of foam plastic beads: choose expandable acrylonitrile / benzyl N-allyl carbamate / phenyl vinyl sulfone copolymer as the original beads; the particle size of the original beads is less than or equal to the casting 1 / 8 of the minimum wall thickness;

[0035]Step S2, production of lost foam: first, pre-foam the foam plastic beads made in step S1, then place them in a dry and ventilated silo for aging, then fill them into the cavity of the metal mold, heat, Make the beads expand again, fill the gaps between the beads, and make the beads fuse with each other to form a smooth surface, that is, the model, and finally cool the mold; then combine the model with the pouring riser model and bond it with an adhesive Together, form a model cluster to make a solid casting foam plastic model corresponding to the structure and size of the parts to be cast;

[003...

Embodiment 2

[0045] A lost foam full mold casting process is characterized in that it comprises the following steps:

[0046] Step S1, selection of foam plastic beads: choose expandable acrylonitrile / benzyl N-allyl carbamate / phenyl vinyl sulfone copolymer as the original beads; the particle size of the original beads is less than or equal to the casting 1 / 9 of the minimum wall thickness;

[0047] Step S2, production of lost foam: first, pre-foam the foam plastic beads made in step S1, then place them in a dry and ventilated silo for aging, then fill them into the cavity of the metal mold, heat, Make the beads expand again, fill the gaps between the beads, and make the beads fuse with each other to form a smooth surface, that is, the model, and finally cool the mold; then combine the model with the pouring riser model and bond it with an adhesive Together, form a model cluster to make a solid casting foam plastic model corresponding to the structure and size of the parts to be cast;

[00...

Embodiment 3

[0057] A lost foam full mold casting process is characterized in that it comprises the following steps:

[0058] Step S1, selection of foam plastic beads: choose expandable acrylonitrile / benzyl N-allyl carbamate / phenyl vinyl sulfone copolymer as the original beads; the particle size of the original beads is less than or equal to the casting 1 / 10 of the minimum wall thickness;

[0059] Step S2, production of lost foam: first, pre-foam the foam plastic beads made in step S1, then place them in a dry and ventilated silo for aging, then fill them into the cavity of the metal mold, heat, Make the beads expand again, fill the gaps between the beads, and make the beads fuse with each other to form a smooth surface, that is, the model, and finally cool the mold; then combine the model with the pouring riser model and bond it with an adhesive Together, form a model cluster to make a solid casting foam plastic model corresponding to the structure and size of the parts to be cast;

[0...

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Abstract

The invention discloses a lost foam full mold casting process, and the process is characterized by comprising the following steps: S1, selecting foam plastic beads; S2, manufacturing a lost foam; S3,coating a model; S4, preparing a casting rough blank; S5, performing post-processing. The invention further discloses a casting manufactured according to the lost foam full mold casting process. The process is simple and easy to implement, small in dependence on equipment, low in casting cost, high in casting efficiency and finished product percent of pass and suitable for continuous large-scale production, the working environment and production conditions of a casting production line can be greatly improved, the labor intensity is reduced, and energy consumption is reduced; a product obtainedthrough casting is higher in size precision and better in inner and outer surface quality, and has higher economic value, social value and ecological value.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a lost foam solid mold casting process. Background technique [0002] With the development of cutting-edge science and modern industry, various industrial sectors increasingly require that mechanical equipment can operate under high parameters (high temperature, high pressure, high speed and high automation) and harsh working conditions (such as severe wear and corrosion) Under the long-term stable operation, the requirements for the performance of materials, equipment and mechanical parts are getting higher and higher. The application and demand market of high-performance special parts has correspondingly grown rapidly, and finding economical and practical methods to obtain high-performance special parts has become a research and development direction in this field. [0003] Lost foam casting technology is an effective method to realize high-performance special parts. Lost foam...

Claims

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Application Information

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IPC IPC(8): B22C7/02B22C9/04B22C3/00
CPCB22C3/00B22C7/026B22C9/046
Inventor 何祥炎孙国政周万波
Owner ANHUI SOLID FOUNDRY CO LTD
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