CN108145069A

CN108145069A - A kind of cast paint

Info

Publication number: CN108145069A
Application number: CN201611105787.3A
Authority: CN
Inventors: 曲立辉
Original assignee: Qingdao Xiaomi Star Electronic Technology Co Ltd
Current assignee: Qingdao Xiaomi Star Electronic Technology Co Ltd
Priority date: 2016-12-05
Filing date: 2016-12-05
Publication date: 2018-06-12

Abstract

The present invention relates to a kind of cast paints, and including roughing sand, binding agent, curing agent and lubricant, the roughing sand is made of 5%~10% iron cement, 90%~95% quartz sand, and the percentage is mass percent；The binding agent accounts for the roughing sand quality 30%~40%, and the curing agent accounts for the binding agent quality 18%~22%, and the lubricant accounts for the binding agent 5%~9%；Modified activator is further included, the activator accounts for the roughing sand quality 10%~20%.The cast paint of the present invention makes coating have preferable adsorptivity, it is ensured that the quality of casting by adding the modifying agent activated.

Description

A kind of cast paint

Technical field

The present invention relates to casting field more particularly to a kind of cast paints.

Background technology

Cast paint is that blocking buffer action is played among casting and casting mold, reaches Sand sticking-resistant purpose.Lost foam casting is again Claim to carry out casting, be that the paraffin similar to casting dimension shape or bubbles model bonding are combined into model cluster, brushing paint is simultaneously It after drying, is embedded in quartz sand and shakes moulding, pour into a mould under negative pressure, model is made to gasify, liquid metals occupies modal position, solidification The casting method of casting is formed after cooling.The external and inherent quality that the performance of lost foam casting coating will directly affect casting, Coating will play the role of exhaust, support, heat preservation and absorbent foam lipid residue in the casting process of evaporative pattern, wherein, Good liquid adsorptivity is a kind of more important performance of lost foam paint, and coating has the residue that the performance just can guarantee foam Inside and the appearance of casting will not be remained, so as to ensure the quality of casting.Existing lost foam casting coating has good Gas permeability, suspension have higher refractoriness, but do not have liquid adsorptivity, affect the quality of casting.

Invention content

The present invention overcomes the deficiencies in the prior art, provide a kind of preferable lost foam casting coating of liquid adsorptivity.

The technical solution adopted by the present invention is：A kind of cast paint, including roughing sand, binding agent, curing agent and lubricant, institute It states roughing sand to be made of 5%~10% iron cement, 90%~95% quartz sand, the percentage is mass percent；Institute It states binding agent and accounts for the roughing sand quality 30%~40%, the curing agent accounts for the binding agent quality 18%~22%, the profit Lubrication prescription accounts for the binding agent 5%~9%；Further include modified activator, the activator account for the roughing sand quality 10%~ 20%.

Preferably, the roughing sand is made of 5% iron cement, 95% quartz sand, and the percentage is quality percentage Than；The binding agent accounts for the roughing sand quality 32%, and the curing agent accounts for the binding agent quality 18%, and the lubricant accounts for institute State binding agent 6%；Modified activator is further included, the activator accounts for the roughing sand quality 12%, and the modifying agent is activity Charcoal, the activated carbon heat 4~5h at 100~150 DEG C and are activated.

Preferably, the roughing sand is made of 7% iron cement, 93% quartz sand, and the percentage is quality percentage Than；The binding agent accounts for the roughing sand quality 34%, and the curing agent accounts for the binding agent quality 20%, and the lubricant accounts for institute State binding agent 7%；Modified activator is further included, the activator accounts for the roughing sand quality 16%, and the modifying agent is diatom The diatomite is immersed in sulfuric acid solution and carries out activation process by soil.

Preferably, the roughing sand is made of 10% iron cement, 90% quartz sand, and the percentage is quality percentage Than；The binding agent accounts for the roughing sand quality 38%, and the curing agent accounts for the binding agent quality 21%, and the lubricant accounts for institute State binding agent 8%；Modified activator is further included, the activator accounts for the roughing sand quality 18%, and the modifying agent is swelling Soil is crushed to 200 mesh after the bentonite decontamination processing, carries out acidleach activation, then centrifuge, then washed, then The bentonite that drying and pulverization process must activate after centrifugation.

A kind of preparation method of cast paint, it is characterised in that include the following steps：

The first step：The configuration cast paint, the iron cement by isometric 2.5mol/L FeCl3 solution and The NaOH solution mixing of 5mol/L, stands after stirring evenly, and is placed in porcelain evaporating dishes and 20h acquisitions are heated in 110 DEG C of baking ovens；

Second step：Roughing sand, modifying agent are sufficiently mixed to stir evenly to be put into sand mixer and are heated to 180 DEG C~200 DEG C, is mixed Grind 60s, rinsed after cooling with distilled water until be discharged it is limpid, be then placed at 110 DEG C it is dry after add in binding agent, curing agent and Lubricant be mixed and stirred for uniformly.

The present invention solves defect present in background technology, and cast paint of the invention is by adding the modification activated Agent makes coating have preferable adsorptivity, it is ensured that the quality of casting.

Specific embodiment

Presently in connection with embodiment, the present invention is described in further detail.

A kind of cast paint, including roughing sand, binding agent, curing agent and lubricant, roughing sand be by 5%~10% iron cement, 90%~95% quartz sand composition, described percentage are mass percent；Binding agent accounts for roughing sand quality 30%~40%, Gu Agent accounts for binding agent quality 18%~22%, and lubricant accounts for binding agent 5%~9%；Modified activator is further included, activator accounts for The roughing sand quality 10%~20%.

Roughing sand is made of 5% iron cement, 95% quartz sand, and described percentage is mass percent；Binding agent accounts for Roughing sand quality 32%, curing agent account for binding agent quality 18%, and lubricant accounts for binding agent 6%；Modified activator is further included, is activated Agent accounts for the roughing sand quality 12%, and modifying agent is activated carbon, and activated carbon is heated 4~5h at 100~150 DEG C activates. The activated carbon of activation is added, the adsorptivity of coating can be increased.

Roughing sand is made of 7% iron cement, 93% quartz sand, and described percentage is mass percent；Binding agent accounts for Roughing sand quality 34%, curing agent account for binding agent quality 20%, and lubricant accounts for binding agent 7%；Modified activator is further included, is activated Agent accounts for the roughing sand quality 16%, and modifying agent is diatomite, and diatomite is immersed in sulfuric acid solution and carries out activation process.The acid-hatching of young eggs Diatomite aperture, pore-size distribution and structure can be made to change, sulfuric acid with SiO2 diatom tests as main component with not occurring instead Should, and generation soluble-salt is reacted with Al2O3, Fe2O3, make diatomite internal pore structure more rich, specific surface area significantly increases Greatly, adsorptivity is improved.

Roughing sand is made of 10% iron cement, 90% quartz sand, and described percentage is mass percent；Binding agent accounts for Roughing sand quality 38%, curing agent account for binding agent quality 21%, and lubricant accounts for binding agent 8%；Modified activator is further included, is activated Agent accounts for roughing sand quality 18%, and modifying agent is bentonite, is crushed to 200 mesh after the processing of bentonite decontamination, carries out acidleach activation, then It centrifuges, is then washed, then the bentonite that drying and pulverization process must activate after centrifuging.Have inside bentonite big The hole of amount and very big internal surface area have polarity and nonpolar molecule very strong physical absorption ability, in its natural state, Bentonitic inner void is in blocked state, carries out activation process, is greatly improved its adsorptivity.

The first step：Be configured above-mentioned cast paint, iron cement by isometric 2.5mol/L FeCl3 solution and 5mol/L NaOH solution mixes, and is stood after stirring evenly, and is placed in porcelain evaporating dishes and 20h acquisitions are heated in 110 DEG C of baking ovens；

Claims

1. a kind of cast paint, including roughing sand, binding agent, curing agent and lubricant, which is characterized in that the roughing sand is by 5% ~10% iron cement, 90%~95% quartz sand composition, the percentage are mass percent；The binding agent accounts for described Roughing sand quality 30%~40%, the curing agent account for the binding agent quality 18%~22%, and the lubricant accounts for the bonding Agent 5%~9%；Modified activator is further included, the activator accounts for the roughing sand quality 10%~20%.

2. a kind of cast paint according to claim 1, which is characterized in that the roughing sand be by 5% iron cement, 95% Quartz sand forms, and the percentage is mass percent；The binding agent accounts for the roughing sand quality 32%, and the curing agent accounts for The binding agent quality 18%, the lubricant account for the binding agent 6%；Modified activator is further included, the activator accounts for The roughing sand quality 12%, the modifying agent are activated carbon, and the activated carbon heats 4~5h at 100~150 DEG C and lives Change.

3. a kind of cast paint according to claim 1, it is characterised in that：The roughing sand be by 7% iron cement, 93% Quartz sand forms, and the percentage is mass percent；The binding agent accounts for the roughing sand quality 34%, and the curing agent accounts for The binding agent quality 20%, the lubricant account for the binding agent 7%；Modified activator is further included, the activator accounts for The roughing sand quality 16%, the modifying agent are diatomite, and the diatomite is immersed in sulfuric acid solution and carries out activation process.

4. a kind of preparation method of cast paint, it is characterised in that include the following steps：

The first step：Configuration such as Claims 1 to 4 any one of them cast paint, the iron cement is by isometric 2.5mol/L FeCl3 solution and 5mol/L NaOH solution mixing, stand, be placed in porcelain evaporating dishes in 110 DEG C of baking ovens after stirring evenly 20h is heated to obtain；

Second step：Roughing sand, modifying agent are sufficiently mixed to stir evenly to be put into sand mixer and are heated to 180 DEG C~200 DEG C, mixed grind 60s, it is limpid up to being discharged with distilled water rinsing after cooling, it is then placed at 110 DEG C and binding agent, curing agent and profit is added in after drying Lubrication prescription be mixed and stirred for uniformly.