Lost foam casting process of low-alloy cast steel wheel for port machinery

A low-alloy cast steel and lost-foam casting technology, which is applied in the direction of manufacturing tools, casting equipment, casting molding equipment, etc., can solve the problems of no pouring system process design instructions, etc., and achieve the effect of reducing casting costs and broadening the application field

Inactive Publication Date: 2015-02-18
WUXI LEHUA AUTOMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method uses the lost foam casting process to cast low alloy steel, it does not elaborate on the process design of the gating system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The lost foam casting process of low-alloy cast steel wheels for port machinery includes the following steps:

[0030] The first step, pre-foaming molding: choose EPS beads, particle size 0.6~0.8mm, density 21~23g / cm 3 ; Use SJ-KF-450 intermittent pre-foaming machine for pre-foaming, pre-heating temperature 90~95°C, steam pressure 0.12-0.15MPa, pre-foaming temperature 95-102°C, pre-foaming beads are dried into the material Warehouse, the storage time shall not exceed 24h.

[0031] The second step is to prepare the paint; apply the pattern paint; paint the pouring system and the pattern after assembly; the main components of the paint: brown corundum powder, quartz sand powder, zircon powder, high alumina bauxite powder, sodium bentonite, Carboxymethyl fiber, white latex, etc. are added with water and stirred for 3~4 hours.

[0032] The third step is the process design of the pouring system; the pouring is center bottom pouring, and the four sprues are made into a cros...

Embodiment 2

[0039] The lost foam casting process of low-alloy cast steel wheels for port machinery includes the following steps:

[0040] The first step, pre-foaming molding: choose EPS beads, particle size 0.6~0.8mm, density 21~23g / cm 3; Use SJ-KF-450 intermittent pre-foaming machine for pre-foaming, pre-heating temperature 90~95°C, steam pressure 0.12-0.15MPa, pre-foaming temperature 95-102°C, pre-foaming beads are dried into the material Warehouse, the storage time shall not exceed 24h. In the pre-foaming molding step, the mold needs to be preheated, and the preheating time is 15s.

[0041] The second step is to prepare the paint; apply the pattern paint; paint the pouring system and the pattern after assembly; the main components of the paint: brown corundum powder, quartz sand powder, zircon powder, high alumina bauxite powder, sodium bentonite, Carboxymethyl fiber, white latex, etc. are added with water and stirred for 3~4 hours.

[0042] The third step is the process design of t...

Embodiment 3

[0049] The lost foam casting process of low-alloy cast steel wheels for port machinery includes the following steps:

[0050] The first step, pre-foaming molding: choose EPS beads, particle size 0.6~0.8mm, density 21~23g / cm 3 ; Use SJ-KF-450 intermittent pre-foaming machine for pre-foaming, pre-heating temperature 90~95°C, steam pressure 0.12-0.15MPa, pre-foaming temperature 95-102°C, pre-foaming beads are dried into the material Warehouse, the storage time shall not exceed 24h. In the pre-foaming molding step, the mold needs to be preheated, and the preheating time is 15s. Cooling: The upper and lower surfaces of the pattern are cooled at the same time, and the cooling time is 2 to 3 minutes to prevent the shape deformation gauge from foaming again.

[0051] The second step is to prepare the paint; apply the pattern paint; paint the pouring system and the pattern after assembly; the main components of the paint: brown corundum powder, quartz sand powder, zircon powder, high...

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Abstract

The invention relates to a lost foam casting process of a low-alloy cast steel wheel for port machinery. The lost foam casting process comprises the following steps: firstly, pre-foaming and forming; secondly, preparing a coating, coating a template, and coating after assembling a casting system and the template; thirdly, designing a casting system process; fourthly, shaping; fifthly, performing the casting process steps; sixthly, finishing all castings, keeping negative pressure for 15 minutes, standing and cooling for at least 12 hours, and opening a box. According to the lost foam casting process, various technical difficulties are overcome, the application range of the lost foam casting technology is expanded, the casting cost is greatly reduced, and the concept that people often think that low-alloy cast steel is forbidden zone of lost foam casting is broken through; small-batch pilot tests and large-batch production practices show that the one-time qualification rate of casting products reaches about 95%.

Description

technical field [0001] The invention relates to a lost-foam casting process, in particular to a lost-foam casting process for low-alloy cast steel wheels for port machinery. Background technique [0002] Lost foam casting (also known as full mold casting) is made of foam plastic (EPS, STMMA or EPMMA) lost foam casting process polymer material to form a full mold with exactly the same structure and size as the part to be cast. After dipping and refractory After the coating (plays the role of strengthening, smoothing, and ventilation) and drying, it is buried in dry quartz sand and subjected to three-dimensional vibration modeling, and the casting mold sand box is poured with molten metal under negative pressure to make the polymer material model heated and vaporized It is a new casting method for castings produced by a new process of one-time molding casting formed after being extracted and replaced by liquid metal after cooling and solidification. [0003] There are many di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/08B22C9/28B22D27/09B22D37/00
CPCB22C9/04B22C9/08B22C9/28B22D27/09B22D37/00
Inventor 钱国东
Owner WUXI LEHUA AUTOMATION TECH
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