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New and old sand mixing system for casting and sand mixing method thereof

A mixing system and sand mixing technology, which is applied in the direction of casting molding equipment, manufacturing tools, cleaning/processing machinery of casting mold materials, etc., can solve the problem of increasing the proportion of resin sand curing agent, reducing the processing capacity of the sand processing system, and increasing the sand processing capacity. Deal with system load and other issues to achieve the effect of improving the strength of molding sand, facilitating sand mixing operation, and improving the quality of sand molds

Active Publication Date: 2017-08-15
KOCEL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method has the following two problems: on the one hand, a large amount of new sand is dumped at one time, and it cannot be completely uniformly mixed; increase, which increases the cost of sand; on the other hand, the new sand needs to enter the sand treatment system before it can be used, which increases the load of the sand treatment system and reduces the actual processing capacity of the sand treatment system
At the same time, the sand mold (core) produced by the silica sand mixed with the new sand added in this way and the regenerated silica sand is unevenly mixed, resulting in insufficient strength in the local parts of the sand mold that are not mixed with the new silica sand, and sticky sand is produced in the corresponding parts of the casting. , slag inclusions and other casting defects

Method used

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  • New and old sand mixing system for casting and sand mixing method thereof
  • New and old sand mixing system for casting and sand mixing method thereof
  • New and old sand mixing system for casting and sand mixing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 2 — Figure 4 Shown is the new and old sand mixing system for foundry of the present invention, which includes a new sand lifting mechanism, a mixing mechanism and a PLC control system. The mixing mechanism includes a new sand tank 1, a regenerated sand tank and a sand mixing bucket. The regenerated old sand, the bottom of the new sand tank and the regenerated sand tank are respectively equipped with a sand delivery pipe 1 4 and a sand delivery pipe 2 5, and the sand outlet ends of the sand delivery pipe 1 4 and the sand delivery pipe 2 5 are respectively connected with the sand mixing bucket , a pneumatic butterfly valve 7 and a proportional valve 6 are respectively provided on the pipeline of the sand conveying pipe 1, a pneumatic butterfly valve 7 is provided on the pipeline of the sand conveying pipe 2 5, a stirring mechanism is provided in the sand mixing hopper, and the bottom side of the sand mixing hopper is connected with a pneumatic valve. The...

Embodiment 2

[0027] The sand mixing method using the new and old sand mixing system for foundry of the present invention mainly includes the following process: 1) Determine the mixing ratio of new sand and old sand according to the requirements for the use of foundry sand, and adjust the second upper proportional valve of each sand delivery pipe according to the sand adding ratio size, so that the mixing ratio of new sand and old sand flowing into the sand mixing bucket meets the mixing ratio requirements set above, and then fix the position of each proportional valve 6;

[0028] 2) Put the new sand into the transition bucket 11, open the lifting mechanism, and put the new sand into the new sand tank 1 through the bucket elevator 10 through the sand outlet pipe 9;

[0029] 3) When the adding letter controller of the PLC control system receives the sand adding signal from the sand adding point of the sand mixer, it feeds back to the corresponding pneumatic butterfly valve controller, and the...

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Abstract

The invention relates to a new and old sand mixing system for casting and a sand mixing method thereof which can realize uniform sand mixing, wherein a new and old sand mixing system for casting includes a new sand lifting mechanism, a mixing mechanism and a PLC control system, and the mixing mechanism includes A new sand tank, a regenerated sand tank and a sand mixing bucket, the regenerated sand tank is used to store the crushed and separated regenerated old sand, the bottoms of the new sand tank and the regenerated sand tank are respectively equipped with a sand delivery pipe 1 and a sand delivery pipe 2, The sand outlets of the first sand delivery pipe and the second sand delivery pipe are respectively connected to the sand mixing hopper, and a pneumatic butterfly valve and a proportional valve are respectively installed on the pipeline of the first sand delivery pipeline, and a pneumatic butterfly valve and a proportional valve are respectively installed on the pipeline of the second sand delivery pipeline. A pneumatic butterfly valve is provided, a stirring mechanism is provided in the sand mixing bucket, and the bottom side of the sand mixing bucket is connected to a pneumatic sending tank; the new sand lifting mechanism is used to lift and transport new sand to the new sand tank, and the PLC control system includes sand adding Signal controller and pneumatic butterfly valve controller.

Description

technical field [0001] The invention relates to the technical field of regenerating silica sand for foundry, in particular to a new and old sand mixing system for foundry and a sand mixing method thereof. Background technique [0002] Usually, the workflow of the foundry sand treatment process is as follows: figure 1 As shown, firstly, the poured and cooled sand box is boxed, and after the sand is cooled, the sand block is crushed and preliminarily separated by a shakeout machine, and the separated sand is sent to the mechanical regeneration tower by a pneumatic sending device for cooling And separation, after reaching the standard, the sand is sent to the chromite sand separation equipment through the pneumatic sending device, and the silica sand and chromite sand are finely separated and dedusted, and then stored in the regenerated sand storage tank. When the sand is needed on site, Use the pneumatic sending device to send the sand to the quicksand operation in the sand m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/04
Inventor 罗永建常永慧杨军黄敬王国庆
Owner KOCEL STEEL