AU2012101161A4

AU2012101161A4 - A Method of Inspecting Phenolic Resin And Organic Ester Hardener Raw Materials

Info

Publication number: AU2012101161A4
Application number: AU2012101161A
Authority: AU
Inventors: Runying Wang; Xiaobing Xie; Yongjiao Ye
Original assignee: Sufa Hengdian Machinery Co Ltd CNNC
Current assignee: Sufa Hengdian Machinery Co Ltd CNNC
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2012-10-25
Anticipated expiration: 2020-07-31

Abstract

Title: A Method of Inspecting Phenolic Resin And Organic Fat Hardener Raw Materials Abstract The invention discloses a method of inspecting phenolic resin and organic fat hardener raw materials, comprising steps as follows: preparing the raw materials to be inspected, including phenolic resin, organic fat hardener and mixed sand composed of raw sand and reclaimed sand; preparing the inspection equipments, including a container 1, a container II, a weighing device, a sand mixer and a sample mold; weighing a quantitative of phenolic resin with the container I, weighting a quantitative of organic fat hardener with the container II, and weighing a quantitative of mixed sand with the sand-mixing barrel on the sand mixer; starting the sand mixer, pouring the organic fat hardener in the container II into the sand-mixing barrel filled with mixed sand slowly, rotating the barrel for 10 ~ 20 seconds after pouring, then pouring the phenolic resin in the container I into the sand-mixing barrel filled with mixed sand, rotating the sand-mixing barrel for 20 ~ 30 seconds after pouring; pouring the well-stirred mixed sand into the sample mold, detecting the ultimate strength of the sand mold in the sample mold after 24h, if the strength is greater than or equal to 2.OMpa, the phenolic resin and organic fat hardener can meet the use requirements of the reclaimed sand.

Description

Description A Method of Inspecting Phenolic Resin And Organic Fat Hardener Raw Materials Technical Filed The invention relates to a method of inspecting compositions and organic additives, in particular relates to a method of inspecting the purchased phenolic resin and organic fat hardener raw materials which are used as raw materials of resin sand. Background of the Invention Raw materials of the resin sand mainly comprise raw sand, resin and relevant additives, and choosing of the raw materials influences the casting cost greatly, and this has been agreed by most foundry machinery industries; as on one hand the quality of the resin sand influences the adding amount and consumption of various materials, and influences the quality index of the casting on the other hand. Wherein the physical and chemical performance indexes of the alkaline phenolic resin which is used as commonly-used raw material comprise: PH value, viscosity, density, content of free formaldehyde, tensile strength of the Guilin standard sand in 24h; the physical and chemical performance indexes of the organic fat hardener comprise: ester content, content of free acid, viscosity, density. If the foundry factory as the user inspects the qualities of the raw materials according to the physical and chemical performance indexes provided by the supplier, the disadvantages comprise: 1. The costs of the inspection equipments are high; 2. If Guilin standard sand is used to inspect the strength, a certain differences exist compared with the use standard of the reclaimed sand in the casting site, namely the tensile strength detected by the Guilin standard sand meets the requirements, but in actual use, the mixed sand is added with at least 80% reclaimed sand, moreover it has no reference value to represent with the tensile strength. Summary of the Invention The problem to be solved by the invention is to provide a method of inspecting phenolic resin and organic fat hardener raw materials, namely a method of converting the physical and chemical performance indexes provided by the supplier to accord with the requirements at the casting site, which is simple and convenient for operation; the inspected raw material can save costs and also can meet the requirements of the reclaimed sand. In order to solve above-mentioned technical problems, the invention adopts a technical proposal as follows: A method of inspecting phenolic resin and organic fat hardener raw materials, wherein: steps as follows are comprised: 1) Preparing the raw materials to be inspected, including phenolic resin, organic fat hardener and mixed sand composed of raw sand and reclaimed sand; 2) Preparing the inspection equipments, including a container 1, a container II, a weighing device, a sand mixer and a sample mold; 3) Weighing a quantitative of phenolic resin with the container I, weighting a quantitative of organic fat hardener with the container II, and weighing a quantitative of mixed sand with the sand-mixing barrel on the sand mixer; 4) Starting the sand mixer, pouring the organic fat hardener in the container II into the sand-mixing barrel filled with mixed sand slowly, rotating the barrel for 10 - 20 seconds after pouring, then pouring the phenolic resin in the container I into the sand-mixing barrel filled with mixed sand, rotating the sand-mixing barrel for 20 - 30 seconds after pouring; 5) Pouring the well-stirred mixed sand into the sample mold, detecting the ultimate strength of the sand mold in the sample mold after 24h, if the strength is greater than or equal to 2.OMpa, the phenolic resin and organic fat hardener can meet the use requirements of the reclaimed sand. Preferably, the raw sand takes up15% - 20% of the mass of the mixed sand, the reclaimed sand takes up 80% 85% of the mass of the mixed sand. Preferably, the Loss on ignition of said reclaimed sand is less than 1.80%, the ash is less than 1%. Preferably, in step 4), the time for pouring the organic fat hardener and the time for pouring the phenolic resin are all 50 - 70 seconds. Preferably, said container I and container II are beakers; said weighing device is an electronic balance. Preferably, the quantity of said sample molds is 5 - 8pcs. The average value of the strength of the sand mold is obtained by detecting for many times so as to enhance the inspection accuracy. Advantages of the invention comprise: as a method of converting the converting the physical and chemical performance indexes provided by the supplier to accord with the requirements at the casting site is adopted, the invention can finish the inspection with inspection equipments of low costs, is simple and convenient for operating, can save raw materials and also meets the use requirements of the reclaimed sand. Detailed Description of the Invention A method of inspecting phenolic resin and organic fat hardener raw materials comprises steps as follows: 1) Preparing the raw materials to be inspected, including phenolic resin, organic fat hardener and mixed sand composed of raw sand and reclaimed sand; 2) Preparing the inspection equipments, including a container 1, a container II, a weighing device, a sand mixer and a sample mold; 3) Weighing a quantitative of phenolic resin with the container I, weighting a quantitative of organic fat hardener with the container II, and weighing a quantitative of mixed sand with the sand-mixing barrel on the sand mixer; 4) Starting the sand mixer, pouring the organic fat hardener in the container II into the sand-mixing barrel filled with mixed sand slowly, rotating the barrel for 10 - 20 seconds after pouring, then pouring the phenolic resin in the container I into the sand-mixing barrel filled with mixed sand, rotating the sand-mixing barrel for 20 - 30 seconds after pouring; 5) Pouring the well-stirred mixed sand into the sample mold, detecting the ultimate strength of the sand mold in the sample mold after 24h, if the strength is greater than or equal to 2.OMpa, the phenolic resin and organic fat hardener can meet the use requirements of the reclaimed sand. Specific Example: Preparing two 50ml beakers, an electronic balance with accuracy above 0.01g and maximum capacity of 1kg, an experimental sand mixer with maximum sand-mixing range of 3kg, 6 sample molds with sand mold sample size of #50x50; Firstly washing the inner walls of the two 50ml beakers with phenolic resin and organic fat hardener and then backwards drying to prevent impurities, then weighing 38.75g phenolic resin with a 50ml beaker washed with phenolic resin, and weighing 9.69g organic fat hardener with a 50ml beaker washed with organic fat; Weighing 2500g mixed sand with the sand-mixing barrel on the experimental sand mixer, installing the sand-mixing barrel on the experimental sand mixer, starting the experimental sand mixer, pouring the organic fat hardener into the rotating sand-mixing barrel slowly within 50 - 70 seconds, rotating for 10 - 20 seconds after pouring, then pouring the phenolic resin into the sand-mixing barrel which is mixed with organic fat hardener slowly within 50 - 70 seconds, stirring for 20 - 30 seconds after pouring, then stopping stirring; Pouring the well-stirred mixed sand into the sample block model for sampling, testing the ultimate strength of the sand mold in the sample block model, if the strength is greater than or equal to 2.0MPa, the phenolic resin and organic fat hardener meets the requirements of the reclaimed sand. Above-mentioned example is only the preferred embodiment of the invention, parameters therein can be changed according to the technological requirements, which all belong to the technology category of the invention. Technicians of this filed can make various changes and deformations according to the invention, which all belong to the range defined by the claims of the invention provided not beyond the spirits of the invention.

Claims

1. A method of inspecting phenolic resin and organic fat hardener raw materials, wherein: steps as follows are comprised: 1) Preparing the raw materials to be inspected, including phenolic resin, organic fat hardener and mixed sand composed of raw sand and reclaimed sand; 2) Preparing the inspection equipments, including a container 1, a container II, a weighing device, a sand mixer and a sample mold; 3) Weighing a quantitative of phenolic resin with the container I, weighting a quantitative of organic fat hardener with the container II, and weighing a quantitative of mixed sand with the sand-mixing barrel on the sand mixer; 4) Starting the sand mixer, pouring the organic fat hardener in the container II into the sand-mixing barrel filled with mixed sand slowly, rotating the barrel for 10 - 20 seconds after pouring, then pouring the phenolic resin in the container I into the sand-mixing barrel filled with mixed sand, rotating the sand-mixing barrel for 20 - 30 seconds after pouring; 5) Pouring the well-stirred mixed sand into the sample mold, detecting the ultimate strength of the sand mold in the sample mold after 24h, if the strength is greater than or equal to 2.OMpa, the phenolic resin and organic fat hardener can meet the use requirements of the reclaimed sand.

2. The method of inspecting phenolic resin and organic fat hardener raw materials according to claim 1, wherein: the raw sand takes up15% - 20% of the mass of the mixed sand, the reclaimed sand takes up 80% - 85% of the mass of the mixed sand.

3. The method of inspecting phenolic resin and organic fat hardener raw materials according to claim 1 or 2, wherein: the Loss on ignition of said reclaimed sand is less than 1.80%, the ash is less than 1%.

4. The method of inspecting phenolic resin and organic fat hardener raw materials according to claim 1, wherein: in step 4), the time for pouring the organic fat hardener and the time for pouring the phenolic resin are all 50 - 70 seconds.

5. The method of inspecting phenolic resin and organic fat hardener raw materials according to claim 1, wherein: said container I and container II are beakers; said weighing device is an electronic balance.

6. The method of inspecting phenolic resin and organic fat hardener raw materials according to claim 1,wherein: the quantity of said sample molds is 5 - 8pcs. 4