Lost foam casting process for casting with good mechanical properties

A technology of lost foam casting and mechanical performance, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc. It can solve the problems of metal mechanical performance degradation, pollution of molten metal, and poor cooling effect of molten metal, so as to reduce the solid-liquid phase The production of products, the prevention of contamination of molten metal, and the better effect of heat dissipation

Inactive Publication Date: 2015-06-10
QINGDAO DAYUN MACHINERY
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during lost foam casting, due to the thermal effect of the molten metal during the gasification of the model, a large amount of high-activity solid-liquid phase products will be generated near the molten metal and the n...

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

[0016] A lost foam casting process with good mechanical properties of castings, comprising the following steps:

[0017] (1) The main parts are made of foam materials in blocks, and the main parts are bonded to form a casting model;

[0018] (2) Bond the sprue for the casting model, and coat the outside of the casting model and the sprue with refractory material to make the final model;

[0019] (3) Put the final model into the sand box, fill it with dry sand, vibrate it with a three-dimensional vibrating table, and cover the sand box with a plastic film;

[0020] (4) From top to bottom, evenly pass negative pressure airflow into the sand box until the negative pressure reaches -0.08Mpa. The negative pressure airflow uses a mixed gas of oxygen, nitrogen, and carbon dioxide;

[0021] (5) The molten metal is poured into the area corresponding to the final model in the sand box. In step (2), the final model gasifies and disappears, the metal replaces the final model, and the cas...

Embodiment 2

[0025] A lost foam casting process with good mechanical properties of castings, comprising the following steps:

[0026] (1) The main parts are made of foam materials in blocks, and the main parts are bonded to form a casting model;

[0027] (2) Bond the sprue for the casting model, and coat the outside of the casting model and the sprue with refractory material to make the final model;

[0028] (3) Put the final model into the sand box, fill it with dry sand, vibrate it with a three-dimensional vibrating table, and cover the sand box with a plastic film;

[0029] (4) From top to bottom, evenly pass negative pressure airflow into the sand box until the negative pressure reaches -0.05Mpa. The negative pressure airflow uses a mixed gas of oxygen, nitrogen, and carbon dioxide;

[0030] (5) The molten metal is poured into the area corresponding to the final model in the sand box. In step (2), the final model gasifies and disappears, the metal replaces the final model, and the cas...

Embodiment 3

[0034] A lost foam casting process with good mechanical properties of castings, comprising the following steps:

[0035] (1) The main parts are made of foam materials in blocks, and the main parts are bonded to form a casting model;

[0036] (2) Bond the sprue for the casting model, and coat the outside of the casting model and the sprue with refractory material to make the final model;

[0037] (3) Put the final model into the sand box, fill it with dry sand, vibrate it with a three-dimensional vibrating table, and cover the sand box with a plastic film;

[0038] (4) From top to bottom, evenly pass negative pressure airflow into the sand box until the negative pressure reaches -0.04Mpa. The negative pressure airflow uses a mixed gas of oxygen, nitrogen, and carbon dioxide;

[0039] (5) The molten metal is poured into the area corresponding to the final model in the sand box. In step (2), the final model gasifies and disappears, the metal replaces the final model, and the cas...

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

No PUM Login to view more

Abstract

The invention discloses a lost foam casting process for a casting with good mechanical properties. The lost foam casting process comprises the following steps of preparing all main parts from foam material blocks, and bonding all the prepared main parts to prepare a casting model; bonding a pouring gate for the casting model, and coating a refractory material at the outer sides of the casting model and the pouring gate to prepare a final model; placing the final model into a sand box, filling the sand box with dry sand, compacting by using a three-dimensional compacting table, and coating a plastic film on the sand box; uniformly introducing negative-pressure airflow to the sand box from top to bottom until the negative pressure is up to 0.04MPa below zero to 0.08MPa below zero, wherein the negative-pressure airflow is mixed gas of oxygen, nitrogen and carbon dioxide; and pouring molten metal into the region where the final model is arranged in the sand box, gasifying to enable the final model to disappear, replacing the final model with metal, and cooling to obtain the casting. By using the lost foam casting process, generated solid/liquid-phase products can be effectively reduced, molten metal can be prevented from being polluted, the heat radiating effect of metal becomes good, and the mechanical properties of the metal are improved.

Description

technical field [0001] The invention relates to a lost foam casting method, in particular to a lost foam casting process with good mechanical properties of castings. Background technique [0002] Lost foam casting (also known as solid casting) is made of foam plastic (EPS, STMMA or EPMMA) polymer material to form a solid mold with exactly the same structure and size as the part to be cast, after dipping refractory coating (strengthening , bright and clean, air-permeable) and dried, buried in dry quartz sand and subjected to three-dimensional vibration modeling, pouring molten metal into the casting mold sand box under negative pressure, so that the polymer material model is heated and gasified and drawn out, and then is cast Liquid metal replaces the one-time molding casting new technology formed after cooling and solidification to produce a new casting method for castings. [0003] However, during lost foam casting, due to the thermal effect of the molten metal during the ...

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
IPC IPC(8): B22C9/04
CPCB22C9/04
Inventor 陶岩华
Owner QINGDAO DAYUN MACHINERY
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