Unlock instant, AI-driven research and patent intelligence for your innovation.

Driving wheel lost foam casting technology

A technology of lost foam casting and driving wheels, which is applied in the manufacture of tools, casting molding equipment, casting molds, etc. It can solve the problems of difficult guarantee of wall thickness, complicated process, high scrap rate, etc., and achieve good economic benefits, high structural strength, and finished products high rate effect

Active Publication Date: 2016-04-06
XINGHUA YALAN MACHINERY MFG
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing driving wheels are generally sand-cast, and cores need to be made during molding. The process is complicated, the wall thickness is not easy to guarantee, the scrap rate is high, and the production efficiency is low. At present, the valve body is also cast by the lost foam process. Polystyrene foamed beads are foamed to form a lost foam model. After combination and bonding, the surface is brushed with refractory paint, dried, and the box is buried with dry sand, poured under negative pressure, and the lost foam gasifies and disappears to form Casting, but the strength of the white mold is low, and after brushing, drying, embedding and other processes, it is easy to cause deformation and high scrap rate

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

[0041] A driving wheel lost foam casting process of this embodiment comprises the following steps:

[0042] 1. Pre-expanded beads; pre-expand the beads in an expansion chamber with a pressure of 0.03Mpa, when the preheating temperature reaches 80°C, the pre-expanding time is controlled at 60s, the foaming temperature is 75°C, and the steam pressure is controlled at 0.12MPa , use an electronic balance to detect the bead density to ensure that the bead density is at 19g / L, and the surface of the bead is required to be bright and round; in summer, the bead curing temperature is controlled for 6 hours, and in winter, the bead curing temperature is controlled at 10 Hours, the effective use time of the beads after curing is 25 days.

[0043] 2. White mold forming; including the following steps: mold closing, material loading, mold locking, mold preheating, fixed mold and movable mold penetration heating, vacuum delay, mold unlocking, and demoulding; when closing the mold, leave a 4...

Embodiment 2

[0056] A driving wheel lost foam casting process of this embodiment comprises the following steps:

[0057] 1. Pre-expanded beads; pre-expand the beads in an expansion chamber with a pressure of 0.06Mpa, when the preheating temperature reaches 85°C, the pre-expanding time is controlled at 60s, the foaming temperature is 80°C, and the steam pressure is controlled at 0.15MPa , use an electronic balance to detect the bead density to ensure that the bead density is 21g / L, and the surface of the bead is required to be bright and round; in summer, control the bead curing temperature for 6 hours, and in winter, control the bead curing temperature at 10 Hours, the effective use time of the beads after curing is 25 days.

[0058] 2. White mold forming; including the following steps: mold closing, material loading, mold locking, mold preheating, fixed mold and movable mold penetration heating, vacuum delay, mold unlocking, and demoulding; when closing the mold, leave a gap of 5mm, lock...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a driving wheel lost foam casting technology. The driving wheel lost foam casting technology comprises the following steps of bead pre-foaming, lost foam pattern forming, lost foam pattern drying, lost foam pattern bonding, casting system bonding, lost foam pattern edging operation, parting surface sealing, lost foam pattern fixing operation, casting system bonding, lost foam pattern dip coating operation, coating drying operation, lost foam pattern modeling, smelting and casting. By means of the lost foam technology, a cast driving wheel is high in structural strength, not prone to deformation and high in yield and has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of lost foam casting technology, and in particular relates to a driving wheel lost foam casting technology. Background technique [0002] Lost foam casting is currently the fastest-growing new casting process, and coating technology is one of the keys to the success of this process. At present, most of the lost foam casting manufacturers in my country use self-made coatings for production. defect. [0003] Existing driving wheels are generally sand-cast, and cores need to be made during molding. The process is complicated, the wall thickness is not easy to guarantee, the scrap rate is high, and the production efficiency is low. At present, the valve body is also cast by the lost foam process. Polystyrene foamed beads are foamed to form a lost foam model. After combination and bonding, the surface is brushed with refractory paint, dried, and the box is buried with dry sand, poured under negative pressure, and...

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): B22C7/02B22C9/04B22C9/28
CPCB22C7/02B22C9/04B22C9/28
Inventor 张雅岚
Owner XINGHUA YALAN MACHINERY MFG