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Bonding additive for resin self-hardening sand

A self-hardening sand and additive technology, applied in the directions of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problem of unsatisfactory bonding effect, slow hardening speed and poor collapsibility. Good and other problems, to achieve the effect of improving the bonding effect, fast hardening speed and good fluidity

Inactive Publication Date: 2017-05-10
CHIZHOU GONGHE MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, it is found that only using no-hardening resin as the adhesive, the bonding effect cannot achieve the desired effect, and the hardening speed is slow, and the collapsibility is not good after use, so it is necessary to add additives to improve the bonding effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Heat 12 parts of wax additives until completely melted, then add 10 parts of turpentine and 5 parts of hydrogenated rosin, mix and dissolve completely, and obtain material I;

[0021] (2) Add 8 parts of carbomer resin and 3 parts of guar gum to 50 parts of waste engine oil, first heat to 60-70°C and mix for 15 minutes, then add 6 parts of Vaseline and 7 parts of butadiene rubber, and continue heating to 100- Mix at 110°C for 10 minutes to obtain material II;

[0022] (3) Add material I, 10 parts of attapulgite, 10 parts of sodium carboxymethyl starch, 8 parts of activated clay, 5 parts of coconut peat, 3 parts of polyethylene oxide, 2 parts of bamboo vinegar and 1 part of borax in material II, Mix well and mix well.

[0023] Preparation of wax additives: 35 parts of palm wax and 10 parts of stearic acid were added to 80 parts of ethanol, heated to reflux state and kept for 15 minutes, then microwaved at microwave frequency 2450MHz and power 800W for 10 minutes, the...

Embodiment 2

[0025] (1) Heat 15 parts of wax additives until completely melted, then add 15 parts of turpentine and 7 parts of hydrogenated rosin, mix to dissolve completely, and obtain material I;

[0026] (2) Add 6 parts of carbomer resin and 5 parts of guar gum to 60 parts of waste engine oil, first heat to 60-70°C and mix for 15 minutes, then add 10 parts of Vaseline and 5 parts of butadiene rubber, and continue heating to 100- Mix at 110°C for 10 minutes to obtain material II;

[0027] (3) Add material I, 15 parts of attapulgite, 15 parts of sodium carboxymethyl starch, 10 parts of activated clay, 5 parts of coconut peat, 5 parts of polyethylene oxide, 3 parts of bamboo vinegar and 2 parts of borax in material II, Mix well and mix well.

[0028] Preparation of wax additives: Add 40 parts of palm wax and 12 parts of stearic acid to 90 parts of ethanol, heat to reflux state for 15 minutes, then microwave at microwave frequency 2450MHz and power 800W for 10 minutes, then add 10 parts of...

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PUM

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Abstract

The invention discloses a bonding additive for resin self-hardening sand, and relates to the technical field of sectional sand casting. The bonding additive is prepared from the following raw materials in parts by weight: 50 to 60 parts of used engine oil, 12 to 17 parts of wax auxiliary agents, 10 to 15 parts of attapulgite, 10 to 15 parts of sodium carboxymethyl starch, 10 to 15 parts of turpentine oil, 8 to 12 parts of activated clay, 6 to 11 parts of Carbomer resin, 6 to 11 parts of vaseline, 5 to 8 parts of hydrogenated rosin, 5 to 8 parts of cis-polybutadiene, 4 to 6 parts of coco coir, 3 to 5 parts of guar gum, 3 to 5 parts of polyoxyethylene, 2 to 4 parts of bamboo vinegar and 1 to 2 parts of borax. After the addition of the additive provided by the invention, the bonding effect of a bonding agent can be effectively improved; after the additive is mixed with sectional sand, the flowability is high; the sectional sand forming is facilitated; the hardening speed is high; after the hardening, the sectional sand intensity is high; the gas producing quality is small; the collapsibility is high, so that the quality of a casing workpiece is improved, and the recovery and the utilization of the sectional sand are convenient.

Description

[0001] Technical field: [0002] The invention relates to the technical field of sand casting, in particular to a bonding additive for resin self-hardening sand. [0003] Background technique: [0004] Resin self-setting sand is one of the molding and core-making processes in foundry production. This process uses self-hardening resin as a binder. The resin, supporting curing agent and raw sand for casting are mixed. The sand mixture is filled into the sand box (or core box) and compacted mechanically or manually, and the sand mold (sand core) hardens itself. , Obtain a sand mold (core) after ejection. Commonly used resin no-bake sands include furan resin no-bake sand, alkaline phenolic resin no-bake sand and urethane resin no-bake sand. In actual production, it is found that only using no-bake resin as the adhesive, the bonding effect cannot achieve the desired effect, and the hardening speed is slow, and the collapsibility is not good after use, so it is necessary to add add...

Claims

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Application Information

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IPC IPC(8): C09J11/04C09J11/06C09J11/08
CPCC09J11/04C09J11/06C09J11/08
Inventor 刘章清朱满平
Owner CHIZHOU GONGHE MACHINE