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Hot core shell precoated sand modeling process

A hot core shell coated sand and molding process technology, applied in the field of mechanical casting, can solve the problems of difficult control of the production process, large amount of gas generated in the cavity, and difficult gas discharge, etc., and achieves shortened production cycle, low process cost, and work efficiency. improved effect

Active Publication Date: 2014-08-20
NINGBO HOPESUN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the amount of gas generated in the cavity is too large. Since the wall thickness of the cavity is between 15-30mm, the gas generated in the cavity is not easy to discharge, resulting in casting defects such as pores and hollows in the product, and the production process is difficult to control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A hot core shell coated sand molding process includes the following steps in sequence: core shooting, box closing, sand making, vibration, and vacuuming.

[0019] The specific process is as follows: through the hot core shell molding machine, fix the mold on the hot core shell molding machine, align the nozzle of the hot core shell molding machine with the nozzle on the mold, and shoot the coated sand through the action of air pressure. Put it into the heated mold, wait for the coated sand to harden and take it out to form a casting blank. The wall thickness of the casting blank is controlled at 4mm; the finished casting blank and the core shell are assembled; the casting blank is assembled according to Place them in parallel in sequence in the sand box, and fill the waste sand around the mold; then vibrate and compact the molded sand through the vibration table, so that the molded sand can tightly wrap the mold blank; finally, the sand box The vacuum port of the vacuum...

Embodiment 2

[0021] A hot core shell coated sand molding process includes the following steps in sequence: core shooting, box closing, sand making, vibration, and vacuuming.

[0022] The specific process is as follows: through the hot core shell molding machine, fix the mold on the hot core shell molding machine, align the nozzle of the hot core shell molding machine with the nozzle on the mold, and shoot the coated sand through the action of air pressure. Put it into the heated mold, wait for the coated sand to harden and take it out to form a casting blank. The wall thickness of the casting blank is controlled at 4.5mm; the finished casting blank and the core shell are assembled; the assembled casting blank Place them in the sand box in parallel in order, and fill the waste sand around the mold; then vibrate and compact the molded sand through the vibration table, so that the molded sand can tightly wrap the mold blank; finally, sand The vacuum port of the box is connected to the vacuum ...

Embodiment 3

[0024] A hot core shell coated sand molding process includes the following steps in sequence: core shooting, box closing, sand making, vibration, and vacuuming.

[0025] The specific process is as follows: through the hot core shell molding machine, fix the mold on the hot core shell molding machine, align the nozzle of the hot core shell molding machine with the nozzle on the mold, and shoot the coated sand through the action of air pressure. Put it into the heated mold, wait for the coated sand to harden and take it out to form a casting blank. The wall thickness of the casting blank is controlled at 4.8mm; the finished casting blank and the core shell are assembled; the assembled casting blank Place them in the sand box in parallel in order, and fill the waste sand around the mold; then vibrate and compact the molded sand through the vibration table, so that the molded sand can tightly wrap the mold blank; finally, sand The vacuum port of the box is connected to the vacuum ...

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PUM

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Abstract

The invention provides a hot core shell precoated sand modeling process which sequentially comprises the following steps: shooting a core, assembling a mould, culturing sand, vibrating, and vacuumizing. The hot core shell precoated sand modeling process specifically comprises the steps of making a casting blank by a hot core shell mould machine, controlling the wall thickness of the casting blank to be 4-5mm; assembling the casting blank together with a core shell; arranging the blank and the core shell in a sand box in parallel according to sequence, filling waste sand around a casting mould; vibrating and compacting the cultured sand by a compaction platform; and connecting a vacuum hole of the sand box to the vacuum machine, and opening the vacuum machine to ensure that a vacuum atmosphere is formed in the sand box so as to complete the making of a casting mould. According to the hot core shell precoated sand modeling process, the cost is low, the efficiency is high, the environment pollution is low, and the made product is good in quality.

Description

technical field [0001] The invention relates to the technical field of mechanical casting, in particular to a hot core shell coated sand molding process. Background technique [0002] Resin sand casting uses quartz stone as the base material, and the resin curing agent as the binder. The quartz stone is solidified by the resin curing agent to form a mold. The iron-sand ratio of this casting method is generally about 1:4, and the casting molding cost More than 1,500 yuan / ton, this kind of casting method in China is difficult to form an assembly line operation, because the investment in resin sand molding assembly line equipment is huge, most of them use semi-manual molding, which is highly dependent on the proficiency of workers, and the molding efficiency is extremely low. 1 ton of castings / about 12 hours. [0003] In recent years, a hot core shell coated sand molding process has emerged. In this process, the coated coated sand is injected into the heated mold through the c...

Claims

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Application Information

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IPC IPC(8): B22C15/28
Inventor 任美康李辉
Owner NINGBO HOPESUN NEW MATERIAL
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