CN105414456A - Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand - Google Patents
Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand Download PDFInfo
- Publication number
- CN105414456A CN105414456A CN201510813978.4A CN201510813978A CN105414456A CN 105414456 A CN105414456 A CN 105414456A CN 201510813978 A CN201510813978 A CN 201510813978A CN 105414456 A CN105414456 A CN 105414456A
- Authority
- CN
- China
- Prior art keywords
- sand
- phenolic resin
- alkaline phenolic
- phenol
- uniformly mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses alkaline phenolic resin self-hardening sand used for a pump valve casting and capable of forming a net-shaped compact structure. A modified phenolic resin adhesive used in the self-hardening sand has advantages of low viscosity, high bonding strength, good plasticity, low brittleness, lower contents of free phenol and free formaldehyde, smaller using amount, low hardening speed and the like; using performance and reusing performance of moulding sand can be improved effectively; calcium carbonate whiskers and oxidized grapheme composite porous polypropylene fibers which are mixed in sand materials have effects of improving toughness, reinforcing, reducing vibration, preventing slipping and the like, and can form complicated and uniform net-shaped structures in sand molds, plasticity of moulding sand and bonding strength of the sand materials are improved, and scattering and peeling are easier; and ultrafine aluminum silicate has good suspension property and adhesive property, net-shaped structures can be formed among the materials, a process of forming compact sand molds by using the mould sand is facilitated, sand mold scattering in a pouring process is prevented, and surface quality of the casting is improved effectively.
Description
Technical field
The present invention relates to resin sand technical field, particularly relate to a kind of pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture and preparation method thereof.
Background technology
Pump, valve foundry goods have the features such as wall is thin, complex-shaped, and particularly strict to the quality requirement of molding sand in casting process, the quality of molding sand is also the key factor being related to casting quality.Molding sand is mainly used for the material of moulding in casting according to the class that different ratios is mixed by sand material, bonding agent and adminicle etc., different according to the bonding agent used, clay-bonded sand, water-glass sand, resin sand etc. can be divided into, wherein phenol resin sand is widely used in domestic casting industry, wherein air-set mold phenol resin sand because its mulling is convenient, to prepare the advantage such as simple, rate of dispersion is fast, bonding force is strong more in sector application.
Although air-set mold phenol resin sand possesses the advantage of its uniqueness; but also there are some shortcomings of comparatively giving prominence in it; be mainly manifested in that viscosity is large, fragility is large, gas forming amount is high, foundry goods easily produces pin hole, cost is higher, the not easily aspect such as recycling; along with pump valve foundry goods is to the future development of production scale and high precision int, development efficient pollution-free, cost phenolic resin binder that is low, high comprehensive performance are the important prerequisites of casting high quality casting.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture and preparation method thereof.
The present invention is achieved by the following technical solutions:
The pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture, this resin sand is prepared by the raw material of following weight portion: bauxite sand 80-90, light dolomite powder 15-20, superfine alumina silicate 4-5, calcium carbonate crystal whisker 0.6-0.8, graphene oxide 0.01-0.02, polypropylene chip 0.4-0.5, silane coupler 0.01-0.02, phenol-formaldehyde resin modified bonding agent 1-1.5, curing agent 0.3-0.4.
Described phenol-formaldehyde resin modified bonding agent is made up of the raw material of following weight portion: potassium hydroxide solution 3-5, urea 1-2, silane coupler 0.1-0.2 that the formalin 20-35 that octyl epoxy stearate 0.2-0.3, organic silicon surfactant 0.1-0.2, nano aluminium oxide 1-2, Triafol T 2-3, phenol 20-25, concentration are 35-38%, concentration are 30%, its preparation method is: by phenol, formaldehyde adds in reactor, be heated to 60-80 DEG C, potassium hydroxide solution is added after being uniformly mixed 20-30min, be warming up to 80-100 DEG C of reaction 4-5h, add Triafol T subsequently, urea, organic silicon surfactant, continue to be uniformly mixed 1.5-2h, room temperature is cooled to after reaction terminates, subsequently reactant liquor is carried out decompression distillation dehydration with the ramp of 8-10 DEG C/min under 0.5-0.6 × 105Pa condition, decompression distillation is stopped when temperature reaches 105-110 DEG C, add other leftover materials subsequently, be cooled to room temperature after being uniformly mixed and get final product.
Described curing agent is organosilane ester curing agent.
Described a kind of pump valve foundry goods by the preparation method of the alkaline phenolic resin self-hardening sand that can form netted compact texture is:
(1) first calcium carbonate crystal whisker, graphene oxide, polypropylene chip, silane coupler are uniformly mixed rear melt spinning, making length is 50-80 μm, and diameter is that the porous short fiber of 10-20 μm is for subsequent use;
(2) bauxite sand, light dolomite powder, superfine alumina silicate were pulverized 60-100 mesh sieve after mixing, screened sand material drops in puddle mixer, add step (1) gained material and other leftover materials except curing agent and bonding agent subsequently again, curing agent is added after mixed at high speed is even, be uniformly mixed 4-5min, then add phenol-formaldehyde resin modified bonding agent, shake out after continuing to be uniformly mixed 8-10min and get final product.
The phenol-formaldehyde resin modified self-hardening sand that the present invention prepares possesses following advantage:
(1) the phenol-formaldehyde resin modified bonding agent prepared has low viscosity, high bonding strength, plasticity is good, fragility is low, free-phenol and the advantage such as free formaldehyde content is lower, consumption is less, setting rate slows down, and effectively can improve molding sand and uses and re-use performance.
(2) porous polypropylene fibre of blending calcium carbonate crystal whisker, graphene oxide has toughness reinforcing, reinforcement, vibration damping, the effect such as anti-skidding, it can form complicated uniform network structure in sand mold, improve the adhesion strength between the plasticity of molding sand and sand material, easier defeated and dispersed stripping.
(3) superfine alumina silicate added in sand material has good suspension and cementability, can form network structure at storeroom, promotes that molding sand forms fine and close sand mold, prevents sand mold in casting process defeated and dispersed, effectively improve the surface quality of foundry goods.
Detailed description of the invention
This embodiment resin sand is prepared by the raw material of following weight portion: bauxite sand 80, light dolomite powder 15, superfine alumina silicate 4, calcium carbonate crystal whisker 0.6, graphene oxide 0.01, polypropylene chip 0.4, silane coupler 0.01, phenol-formaldehyde resin modified bonding agent 1, curing agent 0.3.
Wherein phenol-formaldehyde resin modified bonding agent is made up of the raw material of following weight portion: potassium hydroxide solution 3, urea 1, silane coupler 0.1 that the formalin 20 that octyl epoxy stearate 0.2, organic silicon surfactant 0.1, nano aluminium oxide 1, Triafol T 2, phenol 20, concentration are 35%, concentration are 30%; Its preparation method is: add in reactor by phenol, formaldehyde, be heated to 60 DEG C, potassium hydroxide solution is added after being uniformly mixed 20min, be warming up to 80 DEG C of reaction 4h, add Triafol T, urea, organic silicon surfactant subsequently, continue to be uniformly mixed 1.5h, room temperature is cooled to after reaction terminates, subsequently reactant liquor is carried out decompression distillation dehydration with the ramp of 8 DEG C/min under 0.5 × 105Pa condition, decompression distillation is stopped when temperature reaches 105 DEG C, add other leftover materials subsequently, be cooled to room temperature after being uniformly mixed and get final product.
The curing agent adopted is glycerol triacetate.
The preparation method of this embodiment resin sand is:
(1) first calcium carbonate crystal whisker, graphene oxide, polypropylene chip, silane coupler are uniformly mixed rear melt spinning, making length is 50 μm, and diameter is that the porous short fiber of 10 μm is for subsequent use;
(2) bauxite sand, light dolomite powder, superfine alumina silicate were pulverized 60 mesh sieves after mixing, screened sand material drops in puddle mixer, add step (1) gained material and other leftover materials except curing agent and bonding agent subsequently again, curing agent is added after mixed at high speed is even, be uniformly mixed 4min, then add phenol-formaldehyde resin modified bonding agent, shake out after continuing to be uniformly mixed 8min and get final product.
The bonding strength of the phenol-formaldehyde resin modified bonding agent obtained by the present embodiment is 6.50MPa, free phenol content≤0.5%, content of free aldehyde≤0.1%, maximum decomposition temperature can reach 540 DEG C, this resin sand stripping time >=25min, 24h tensile strength is 1.48MPa, and core hydroscopicity is low, and gas forming amount reduces by 42% than traditional phenolic resins molding sand, the surface quality of continuous castings obtained is high, size is accurate, and yield rate can reach more than 95%, and reclamation of return sand rate can reach 85%.
Claims (4)
1. the pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture, it is characterized in that, this resin sand is prepared by the raw material of following weight portion: bauxite sand 80-90, light dolomite powder 15-20, superfine alumina silicate 4-5, calcium carbonate crystal whisker 0.6-0.8, graphene oxide 0.01-0.02, polypropylene chip 0.4-0.5, silane coupler 0.01-0.02, phenol-formaldehyde resin modified bonding agent 1-1.5, curing agent 0.3-0.4.
2. a kind of pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture as claimed in claim 1, it is characterized in that, described phenol-formaldehyde resin modified bonding agent is made up of the raw material of following weight portion: potassium hydroxide solution 3-5, urea 1-2, silane coupler 0.1-0.2 that the formalin 20-35 that octyl epoxy stearate 0.2-0.3, organic silicon surfactant 0.1-0.2, nano aluminium oxide 1-2, Triafol T 2-3, phenol 20-25, concentration are 35-38%, concentration are 30%, its preparation method is: by phenol, formaldehyde adds in reactor, be heated to 60-80 DEG C, potassium hydroxide solution is added after being uniformly mixed 20-30min, be warming up to 80-100 DEG C of reaction 4-5h, add Triafol T subsequently, urea, organic silicon surfactant, continue to be uniformly mixed 1.5-2h, room temperature is cooled to after reaction terminates, subsequently reactant liquor is carried out decompression distillation dehydration with the ramp of 8-10 DEG C/min under 0.5-0.6 × 105Pa condition, decompression distillation is stopped when temperature reaches 105-110 DEG C, add other leftover materials subsequently, be cooled to room temperature after being uniformly mixed and get final product.
3. a kind of pump valve foundry goods alkaline phenolic resin self-hardening sand that can form netted compact texture as claimed in claim 1, it is characterized in that, described curing agent is organosilane ester curing agent.
4. a kind of pump valve foundry goods as claimed in claim 1 preparation method of the alkaline phenolic resin self-hardening sand that can form netted compact texture, it is characterized in that, described preparation method is:
(1) first calcium carbonate crystal whisker, graphene oxide, polypropylene chip, silane coupler are uniformly mixed rear melt spinning, making length is 50-80 μm, and diameter is that the porous short fiber of 10-20 μm is for subsequent use;
(2) bauxite sand, light dolomite powder, superfine alumina silicate were pulverized 60-100 mesh sieve after mixing, screened sand material drops in puddle mixer, add step (1) gained material and other leftover materials except curing agent and bonding agent subsequently again, curing agent is added after mixed at high speed is even, be uniformly mixed 4-5min, then add phenol-formaldehyde resin modified bonding agent, shake out after continuing to be uniformly mixed 8-10min and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813978.4A CN105414456A (en) | 2015-11-23 | 2015-11-23 | Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813978.4A CN105414456A (en) | 2015-11-23 | 2015-11-23 | Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105414456A true CN105414456A (en) | 2016-03-23 |
Family
ID=55493240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510813978.4A Pending CN105414456A (en) | 2015-11-23 | 2015-11-23 | Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105414456A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106009493A (en) * | 2016-08-01 | 2016-10-12 | 合肥广能新材料科技有限公司 | Phenolic foam external wall thermal insulation material and preparation method thereof |
| CN108941442A (en) * | 2018-09-15 | 2018-12-07 | 台州进亿成再生资源回收有限公司 | A kind of steel-casting resin sand and preparation method thereof and application method |
| CN115477532A (en) * | 2022-10-12 | 2022-12-16 | 上海烟草机械新场铸造有限责任公司 | Preparation method of water-soluble precision ceramic core for casting aluminum alloy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875830A (en) * | 2009-11-23 | 2010-11-03 | 黑龙江省科学院石油化学研究院 | Phenolic resin/phosphate hybrid adhesive and preparation method thereof |
| CN101927317A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | Furane self-hardening sand |
| CN101941044A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Alkaline phenolic resin self-hardening sand |
| EP2359957A1 (en) * | 2010-01-26 | 2011-08-24 | Foseco International Limited | Method and composition for the preparation of foundry moulds and cores |
| CN104107874A (en) * | 2014-07-30 | 2014-10-22 | 吴江市液铸液压件铸造有限公司 | Self-hardening sand additive for casting resin and preparation method of self-hardening sand additive |
| CN104139154A (en) * | 2014-07-30 | 2014-11-12 | 吴江市液铸液压件铸造有限公司 | Phenolic resin self-hardening sand and preparation method thereof |
-
2015
- 2015-11-23 CN CN201510813978.4A patent/CN105414456A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875830A (en) * | 2009-11-23 | 2010-11-03 | 黑龙江省科学院石油化学研究院 | Phenolic resin/phosphate hybrid adhesive and preparation method thereof |
| EP2359957A1 (en) * | 2010-01-26 | 2011-08-24 | Foseco International Limited | Method and composition for the preparation of foundry moulds and cores |
| CN101927317A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | Furane self-hardening sand |
| CN101941044A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Alkaline phenolic resin self-hardening sand |
| CN104107874A (en) * | 2014-07-30 | 2014-10-22 | 吴江市液铸液压件铸造有限公司 | Self-hardening sand additive for casting resin and preparation method of self-hardening sand additive |
| CN104139154A (en) * | 2014-07-30 | 2014-11-12 | 吴江市液铸液压件铸造有限公司 | Phenolic resin self-hardening sand and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106009493A (en) * | 2016-08-01 | 2016-10-12 | 合肥广能新材料科技有限公司 | Phenolic foam external wall thermal insulation material and preparation method thereof |
| CN108941442A (en) * | 2018-09-15 | 2018-12-07 | 台州进亿成再生资源回收有限公司 | A kind of steel-casting resin sand and preparation method thereof and application method |
| CN115477532A (en) * | 2022-10-12 | 2022-12-16 | 上海烟草机械新场铸造有限责任公司 | Preparation method of water-soluble precision ceramic core for casting aluminum alloy |
| CN115477532B (en) * | 2022-10-12 | 2023-04-25 | 上海烟草机械新场铸造有限责任公司 | Preparation method of water-soluble precise ceramic core for casting aluminum alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101486068A (en) | Alcohol group zircon powder coating for large casting | |
| CN102139342A (en) | High-permeability sand-burning-preventing paint for casting and preparation method thereof | |
| CN105414451A (en) | High-compactness modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of high-compactness modified alkaline phenolic resin self-hardening sand | |
| CN105414456A (en) | Alkaline phenolic resin self-hardening sand used for pump valve casting and capable of forming net-shaped compact structure and preparation method of alkaline phenolic resin self-hardening sand | |
| CN106040965A (en) | Molding sand for casting | |
| CN101927318A (en) | High strength precoated sand | |
| CN102218502A (en) | Isopropanol-based coating for lost foam casting steel and production method thereof | |
| CN103586400A (en) | Preparation process of furan resin sand | |
| CN105081198A (en) | Modified furan resin sand with sodium bentonite for casting steel and preparation method of modified furan resin sand | |
| CN105414455A (en) | High-thermal-stability modified alkaline phenolic resin self-hardening sand for pump valve casting and preparation method of high-thermal-stability modified alkaline phenolic resin self-hardening sand | |
| CN105436397A (en) | Carbon-nanotube-containing modified alkaline phenolic resin self-hardening sand used for pump valve castings and preparation method of self-hardening sand | |
| CN109454200A (en) | A kind of phosphate binders liquid curing-agent and its application | |
| CN105414448A (en) | Nano cerium oxide-containing modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of nano cerium oxide-containing modified alkaline phenolic resin self-hardening sand | |
| CN105108045A (en) | Chopped carbon fiber containing and reinforced type modified furan resin sand for steel casting and preparation method of resin sand | |
| CN105081202A (en) | Nano diatomite containing modified furan resin sand for steel casting and preparation method for nano diatomite containing modified furan resin sand | |
| CN101439388A (en) | Chromium iron resin mould sand and preparation thereof | |
| CN105414449A (en) | Heat resistant modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of heat resistant modified alkaline phenolic resin self-hardening sand | |
| CN105414454A (en) | PPTA(poly-p-phenylene terephthamide)-pulp enhanced modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of PPTA-pulp enhanced modified alkaline phenolic resin self-hardening sand | |
| CN105417997A (en) | Nanosized ceramic powder reinforced modified alkaline phenolic resin self-hardening sand for pump valve casting and preparation method of self-hardening sand | |
| CN105436393A (en) | Modified alkaline phenolic resin self-hardening sand for high-precision pump valve castings and preparation method of self-hardening sand | |
| CN105436396A (en) | High-air-permeability modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of self-hardening sand | |
| CN105414453A (en) | High-strength modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of high-strength modified alkaline phenolic resin self-hardening sand | |
| CN105436392A (en) | Low-viscosity high-fluidity modified alkaline phenolic resin self-hardening sand for pump valve castings and preparation method of self-hardening sand | |
| CN105414457A (en) | Efficient modified alkaline phenolic resin self-hardening sand for thin-walled pump valve casting and preparation method of efficient modified alkaline phenolic resin self-hardening sand | |
| KR890015801A (en) | Composition for Casting Mold Process Using Recycled Sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |