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Method for rapidly detecting bending strength of furan resin-sand

A technology of furan resin and bending strength, which is applied in the field of casting, can solve the problems of unguided production, long time consumption, poor timeliness, etc., and achieve the effect of saving process steps, simple production and improving quality

Pending Publication Date: 2016-09-28
SHANDONG LONGMA HEAVY TECH
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Problems solved by technology

[0003] However, this method of testing the strength of furan resin sand takes a long time and is poor in timeliness. For some urgently needed castings, if the casting sand strength is tested, the casting process has almost been completed. Therefore, the detected molding sand strength value is only There is a reference value for the analysis of follow-up problems, and there is no significance for guiding production. This is the deficiency of the existing technology

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  • Method for rapidly detecting bending strength of furan resin-sand
  • Method for rapidly detecting bending strength of furan resin-sand
  • Method for rapidly detecting bending strength of furan resin-sand

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Embodiment Construction

[0029] In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner.

[0030] Take ten kinds of furan resin sands with a sand mixing machine, which are the first kind of furan resin sand, the second kind of furan resin sand...the tenth kind of furan resin sand, under the same experimental conditions:

[0031] (1) Measure the strength value δ11 of the first furan resin sand according to the requirements of the first step to step seven, and measure the first furan resin sand according to the requirements of the national standard sample. Get the intensity value of first kind of furan resin sand δ21;

[0032] (2) Measure the strength value δ12 of the second furan resin sand according to the requirements of step 1 to step 7, and measure the second furan resin sand according to the requirements of the national standard sample. Get the intensity value of the second kind of furan resin sand δ22; ...

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Abstract

The invention provides a technical scheme of a method for rapidly detecting the flexural strength of furan resin sand, including step 1, sand mixing; step 2, molding; step 3, cooling and hardening; step 4, mold removal; step 5, sampling ; Step 6, grinding the sample; Step 7, testing the strength; Step 8, judging and analyzing. In the present invention, the furan resin sand is cooled for 2-4 hours. After cooling, the mold can be quickly removed and the performance data of the molding sand can be completed. According to the data, it can be judged whether the furan resin sand can be used normally. Casting defects caused by strength.

Description

technical field [0001] The technical field of casting that the present invention relates to, in particular a method for quickly detecting the flexural strength of furfur resin sand. Background technique [0002] The current method of testing furan resin sand is mainly 24-hour performance test. Specifically, it is necessary to use a special experimental mold, fill the mold with furan resin sand, and take samples for 24 hours to obtain 8-shaped samples and cuboid samples, and then test them on the molding sand. On the strength testing machine, the standard 8-shaped test block is used to detect the tensile strength of the 8-shaped sample, and the standard rectangular parallelepiped test block is used to detect the bending strength of the rectangular parallelepiped sample. [0003] However, this method of testing the strength of furan resin sand takes a long time and is poor in timeliness. For some urgently needed castings, if the casting sand strength is tested, the casting pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/20G01N1/28
CPCG01N3/20G01N1/286G01N2001/2866
Inventor 樊宪国
Owner SHANDONG LONGMA HEAVY TECH
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