CN105964889A - Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof - Google Patents
Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof Download PDFInfo
- Publication number
- CN105964889A CN105964889A CN201610457072.8A CN201610457072A CN105964889A CN 105964889 A CN105964889 A CN 105964889A CN 201610457072 A CN201610457072 A CN 201610457072A CN 105964889 A CN105964889 A CN 105964889A
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- China
- Prior art keywords
- sand
- animal glue
- bonding agent
- lithium bentonite
- modified animal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses an environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as an adhesive. The moulding sand is characterized in that the gelatin is modified through lithium-based bentonite to obtain a novel environmentally-friendly moulding sand adhesive; the adhesive is formed in a way that a gelatin solution is etherified and then mixed and reacted with lithium-based bentonite and finally glutaraldehyde is added to crosslink with a reacted product so as to obtain the high-adhering-intensity, high-heat-stability, high-flowability and plasticity adhesive; in addition, sodium alginate which is pre-mixed with sand can be crosslinked and hybridized with calcium chloride to form high-breathability micropore channels, so that the breathability and collapsibility of the moulding sand can be improved. Compared with a traditional product, the prepared moulding sand is environmentally friendly; the quality of a casting prepared through the moulding sand is obviously improved, and the development demand of current industry can be met, so that the moulding sand has a wide application prospect.
Description
Technical field
The present invention relates to casting sand technical field, particularly relate to a kind of environmental protection molding sand using lithium bentonite modified animal glue as bonding agent and preparation method thereof.
Background technology
Molding sand refers to the material in casting for moulding, and molding sand is typically mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things.Molding sand is different by binding agent used, can be divided into clay-bonded sand, water-glass sand, cement bonded sand, resin sand etc..Molding sand effect in Foundry Production is particularly important, and the casting wasted product caused because of the poor quality of molding sand accounts for the 30~50% of the total waste product of foundry goods.Judge on ordinary meaning that moulding-sand property is mainly reflected in the following aspects: (1) has higher intensity and heat stability;(2) ability that good mobility, i.e. molding sand are mutually shifted between sand grains under external force or action of gravity own;(3) certain plasticity, i.e. molding sand deform under external force, can keep the ability of the shape given after external force is removed;(4) preferably breathability, i.e. molding sand hole is through the ability of gas;(5) high collapsibility, it is easy to defeated and dispersed cleaning.
Along with industrial expansion, requirement to foundry industry is more and more higher, and the quality of molding sand is the key factor being related to casting quality, the main flow molding sand of existing market mainly have waterglass, clay etc. one class inorganic adhesive molding sand and the organic adhesive molding sand of class such as synthetic resin, dextrin.To be primarily present collapsibility poor for the inorganic adhesive class molding sand of main flow in the market, the easy moisture absorption, the defects such as old sand utilization rate is low;Although resin sand collapsibility is good, casting accuracy is high, but it easily produces pollution gas in casting process." research of a kind of composite modified animal glue bonding agent preparation technology " literary composition describes the molding sand using modified animal glue as bonding agent, such molding sand environmental protection is degradable, defeated and dispersed effective, feasible developing direction is provided for developing novel molding sand, yet with the natural attribute of animal glue, actual application improves adhesion strength, accelerates curing rate and be still the emphasis of research.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of environmental protection molding sand using lithium bentonite modified animal glue as bonding agent and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of environmental protection molding sand using lithium bentonite modified animal glue as bonding agent, this molding sand is made up of the raw material of following weight portion: 200-400 mesh quartz sand old sand 60-80,300-400 mesh zircon sand 20-30, activated alumina 6-10, lithium bentonite modified animal glue bonding agent 12-16, concentration be sodium alginate aqueous solution 4-5 of 5-10%, concentration be the calcium chloride water 6-8 of 1-10%.
Described lithium bentonite modified animal glue bonding agent is made up of the raw material of following weight portion: lithium bentonite 1-2, phosphoric acid hydrogen two aluminum 0.4-0.5, animal glue 30-40,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1-2, mass concentration are the glutaraldehyde water solution 5-8 of 10-15%, deionized water 30-50;Its preparation method is: first mixed with deionized water by animal glue, it is heated to 50-60 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, lithium bentonite, phosphoric acid hydrogen two aluminum is added after continuing stirring mixing 2-3h, continue stirring mixing 2-3h, finally add glutaraldehyde water solution, after being uniformly mixed, i.e. obtain described lithium bentonite modified animal glue bonding agent.
The preparation method of this molding sand is: first with sodium alginate aqueous solution stirring, quartz sand old sand, zircon sand, activated alumina are mixed 50-80min, it is subsequently added calcium chloride water, continue stirring mixing 3-5h, stirring adds lithium bentonite modified animal glue bonding agent mixing 5-10min after terminating, and to obtain final product.
The present invention utilizes lithium bentonite to be modified animal glue processing, prepare a kind of novel environmental protection molding sand bonding agent, gelatin solution etherificate is first processed by this bonding agent, subsequently by itself and lithium bentonite hybrid reaction, finally add glutaraldehyde cross-linking, it is thus achieved that there is high bond strength, high thermal stability, high fluidity and plastic bonding agent;In addition the sodium alginate being pre-mixed with sand material and the cross-linking hydridization of calcium chloride, form the micro channel that height is ventilative, improve type sand permeability and collapsibility.Molding sand prepared by the present invention significantly improves than traditional product more environmental protection, the quality of foundry goods, and it suits the growth requirement of current industry, has broad application prospects.
Detailed description of the invention
This embodiment molding sand is made up of the raw material of following weight portion: the calcium chloride water 6 that sodium alginate aqueous solution 4 that 200 mesh quartz sand old sand 60,300 mesh zircon sands 20, activated alumina 6, lithium bentonite modified animal glue bonding agent 12, concentration are 5%, concentration are 1%.
Described a kind of environmental protection molding sand using lithium bentonite modified animal glue as bonding agent, described lithium bentonite modified animal glue bonding agent is made up of the raw material of following weight portion: lithium bentonite 1, phosphoric acid hydrogen two aluminum 0.4, animal glue 30,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1, mass concentration are glutaraldehyde water solution 5, the deionized water 30 of 10%;Its preparation method is: first mixed with deionized water by animal glue, it is heated to 50 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, lithium bentonite, phosphoric acid hydrogen two aluminum is added after continuing stirring mixing 2h, continue stirring mixing 2h, finally add glutaraldehyde water solution, after being uniformly mixed, i.e. obtain described lithium bentonite modified animal glue bonding agent.
The preparation method of this embodiment molding sand is: first with sodium alginate aqueous solution stirring, quartz sand old sand, zircon sand, activated alumina are mixed 50min, it is subsequently added calcium chloride water, continuing stirring mixing 3h, stirring adds lithium bentonite modified animal glue bonding agent mixing 5min after terminating, to obtain final product.
The result that the molding sand that this embodiment prepares obtains according to associated test standards's test is as follows:
Green compression strength: 125KPa;Compact rate of molding: 45.6%;Air penetrability: 102;Hot green tensile strength: 56KPa;Shatter index: 92%.
Claims (3)
1. one kind using lithium bentonite modified animal glue as the environmental protection molding sand of bonding agent, it is characterized in that, this molding sand is made up of the raw material of following weight portion: 200-400 mesh quartz sand old sand 60-80,300-400 mesh zircon sand 20-30, activated alumina 6-10, lithium bentonite modified animal glue bonding agent 12-16, concentration be sodium alginate aqueous solution 4-5 of 5-10%, concentration be the calcium chloride water 6-8 of 1-10%.
A kind of environmental protection molding sand using lithium bentonite modified animal glue as bonding agent, it is characterized in that, described lithium bentonite modified animal glue bonding agent is made up of the raw material of following weight portion: lithium bentonite 1-2, phosphoric acid hydrogen two aluminum 0.4-0.5, animal glue 30-40,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1-2, mass concentration are the glutaraldehyde water solution 5-8 of 10-15%, deionized water 30-50;Its preparation method is: first mixed with deionized water by animal glue, it is heated to 50-60 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, lithium bentonite, phosphoric acid hydrogen two aluminum is added after continuing stirring mixing 2-3h, continue stirring mixing 2-3h, finally add glutaraldehyde water solution, after being uniformly mixed, i.e. obtain described lithium bentonite modified animal glue bonding agent.
A kind of preparation method of the environmental protection molding sand using lithium bentonite modified animal glue as bonding agent, it is characterized in that, described preparation method is: first with sodium alginate aqueous solution stirring, quartz sand old sand, zircon sand, activated alumina are mixed 50-80min, it is subsequently added calcium chloride water, continue stirring mixing 3-5h, stirring adds lithium bentonite modified animal glue bonding agent mixing 5-10min after terminating, and to obtain final product.
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CN201610457072.8A CN105964889A (en) | 2016-06-22 | 2016-06-22 | Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof |
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CN201610457072.8A CN105964889A (en) | 2016-06-22 | 2016-06-22 | Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109158526A (en) * | 2018-10-19 | 2019-01-08 | 含山县兴达球墨铸铁厂 | A kind of die casting sand formulation |
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2016
- 2016-06-22 CN CN201610457072.8A patent/CN105964889A/en active Pending
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CN1223913A (en) * | 1999-01-27 | 1999-07-28 | 苏凯蒂 | Mould material for investment casting and mould forming method |
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CN109158526A (en) * | 2018-10-19 | 2019-01-08 | 含山县兴达球墨铸铁厂 | A kind of die casting sand formulation |
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