CS223308B1 - Separating and lubricating means for attending the mounds mainly by pressure casting of the iron alloys - Google Patents

Abstract

A separating and lubricating agent for treating moulds, particularly in the pressure die casting iron alloys, contains (i) finely ground graphite, e.g. 0.5 to 50 wt. parts, finely ground aluminium powder, e.g. 0.05 to 15 wt. parts and/or lithium aluminium hydride, e.g. 0.05 to 10 wt parts, and (ii) an oxide of iron, tungsten, vanadium, bismuth, zirconium and/or titanium, e.g. 0.5 to 10 wt. parts, dispersed in a hydrocarbon or an aqueous medium.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold disintegrating and lubricating agent, in particular for die casting of iron alloys containing finely divided graphite in an amount of 0.5 to 50 parts by weight or finely ground aluminum powder in an amount of 0.05 to 15 parts by weight or parts. aluminum hydride in an amount of 0.05 to 10 parts by weight, suspended in a hydrocarbon or aqueous medium, optionally in a mixture thereof, and further comprising one of iron, tungsten, vanadium, bismuth, zirconium or titanium oxides individually or in combination 0.5 to 10 wt. parts.

The invention is. relates to mold release agents and lubricants, in particular. in the Uaki casting of Iron alloys^, containujmtoo jem 0.5 to 50 wt. parts^{, p}r^pfinely ground parsley powder in quantity^0.05 to I^{5 h}motor parts no^bO^hy^drid alumina in quantity^0.05 and^of 10 taot^partsscattered in^uhlovodíkov^Em no^bo vo^dném^pgrate^ŘE^dí, '^eventand^dthem in jejic^h sweep

^S Ab to avoid sticking to ^the rozrávenCo ovu to galling and form a ^{p h Hyb} hvýc parts before casting is applied to the active surface forms a separating and lubricating agents. These form a fine link between the mold and the casting, and km capture to remove the casting from the mold.

Recognizable ^e separating .a Lubrication ^s prostfedky ^sharpening molds of pressure casting apparatus is one ^for dissolved ^dl ew ^Ba from ^I ro ^p NYC ^hp roducts, partly water-dilutable based vodnýc ^h emutó Miner & nfch oil ^T where ^P Hklad known mixture cylindrical oil with petro ^l ej and preservative vazetínou, popftpafó with ^p r ew ^ASK mimicry. You will know a mixture of paraffin oil distillate - lower viscosity, motor lubricating oil on oil paraffin hard wax, wax and graphite. The mold lubrication and maintenance are also used oil ^{microcapsules,} the fat and wax ^{y y including the} pMsadou with adipic acid, succinic acid or esters thereof or alkanolamine salts for enhancing the lubricating effect. Another type of lubricating and separated liquid ^P ro from ^p Rácová ^{ck p} from pressure are an aqueous emulsion comprising a mineral oil as an emulsifying agent and the polyoxyethylene adducts of fatty acids, preferably ^gamma stearic ^é and olejovp for improving lubricity in addition sodium tripolyphosphate salts diíliiofosfonové ^alkyl selln ^s with alkanolamines that prevent precipitation of water hardness or increased possibility of corrosion of molds.

Also, a lubricant and coolant for hot metal working comprising water, mineral oil, and ethoxylated synthetic mas ^{t e} k n ^{y g} of petroleum jelly as emulsifying ator ^y. Other water soluble preparation for the treatment of forms pn Poppy HTI .neželezných ^to ov ^U contains a mixture of oils minerálnteh ^Gly glycerides of fatty ^alkyl Selin and emulsifier ^camphor tor ^{yp y} t u al ^ky l ^-y lpol ^yk oleth: er ^ ^k alkylsutíá de phslušný al ^ky L has 12 and ²⁰ uhhkových ^Article Erasing ^meanours molecule.

Furthermore, a composition comprising:^žvo^Ciš.ných^tat^p on the Mzi esterified fatty acids^kysehn jako^palmitov^E, m^yristové^,rerachov teno ^ lmitovp tenom^lanocerac^hov^E .s cer^yland^lkoholem^, lanolinal^toarnaubut^yalcohol and other pol^yC^yklte^toým^and potyterpene-alk^ylpol^ygl^ycol^Eteru s po^Thu.em 8 to²0 carbons in the molecule and s⁵ to²⁵ C^lánk^y in etox^yalkylated chain^lfen^ylafter^lygl^ykoléteru^, where alk^yl has 8 to¹² ethytenox cells^tolight and medium^daysC^h ote'j^at ztekaných va^touovou destil^ací of oil^{, k}ter^E are c^hara^toterizován^y flash point mm. 150 ° C and h^ycaries^jí pri⁵⁰ ° C at a viscosity in the range of 16 to 22 dinaphthyl methanesulfonate^, fine graphite processed into paste by leaking^, aluminum^- powder^- of^pracovan^Eh^O .to^past^y mineral otejem^, carboxymethylteel lose, condensation product - oleic acid with detet^ýlénmtriaminem^, roz^pust^En^ého in excess k ^ el ^ otejov^E charaMerized by number^kyselosti⁸⁰ up to -¹²⁰ m^{g K}OH /^G and water^y.

Besides lubricating and děltefch ^{CIN KU} zvte ^TE for pressure casting of ferroalloys important vtestností ch ^l in ⁱ c ^{s account and} not ^to the mold. ^They generally have water. editelné ^of separating ^p rQst ^R ed ^{alkyl. Psi} cooler ^CIN not ^{of ky} ^ sttelové maiden name.

Use of these agents. ^k . treat ^and rn ^f Orem pressure ^P s ^c h oďtevám iron alloys reduces insufficient thermal stress forms, and these exhibit very low life.

This deficiency. .a lubricating removes ^p rost ^{of the} Formulation oisetreM ^forms, especially ^E on die-casting of ferrous alloys containing a finely ground graphite amount. 0.5 to 50 wt. Parts or finely ground clay ^{to the} AC powder in a solubilizing amount of ^0, 5 to ¹⁵ parts mot ^h or lithium aluminum hydride in an amount of 0.05 to 10 wt. Parts, dispersed in hydrocarbon or aqueous media, optionally in jepch The composition according to the invention, further comprising any of iron, tungsten, vanadium, bismuth, zirconium or titanium or any combination of some or all of them in an amount of 0.5 to 10% by weight. parts.

Hydrocarbon medium means minarální oils obtained by distillation of crude oil throughout the spectrum of light through the medium to heavy oils, animal fats having a high heat stability, such as wool fat, with ^y ntetické oils such as synthetic foot oil, waxes and paraffins or mutual direction ^of the some or all of them. ^{In a} garment environment is meant water which it may contain. dissolved thickeners, such as carboxymethylcellulose .is, dispersing agents such as ^d dinaftylmetandisutfonan with Ny ^at SA ^{dy p} ro ^ ern ZTE smáčivosli hot surfaces to prevent corrosion of the metal mold, ingredients acting against bacteriological decomposition environment etc.

Both media can be mixed with emulsifying agents such as ethoxylated fatty alcohols having 8 to 20 carbon atoms per molecule and 5 to 25 cells in the ethoxylated chain or alkenyl phenyl glycol ether, wherein the alkyl has 6 to 12 ethylene oxide cells.

An advantage of dividing a lubricant composition according to the invention is that on contact of molten matter ZELEZNE ^{é y} slitrn this ^p rost ^R E ^dk em. applied on the mold surface, an endothermic reaction takes place which takes away the first largest and most important thermal impact of the mold life. The endothermic reaction is reduction. metal oxide to lower oxides or metals.

Mazarn divides a grid ^{of P} E ^D e le ^{d kp} the vynMezu .aplikuje the plating layer on the working face of the mold prior to pouring the metal into the mold.

Example of separating and lubricating composition

The 223300 compositions of the invention are apparent from the examples.

Example 1 a d 1

In a duplicator kettle equipped with a stirrer, at 60-80 ° C, 1.6 parts by weight of a mixture of ethoxylated C 12 -C 18 fatty alcohols and 10 to 20 cells of ethylene oxide per molecule, 0.7 parts by weight, of ethoxylated alkylphenol having 9 carbon atoms in the chain and having 9 ethylene oxide cells per molecule. Gradually into ko 'le introduces 5.6 wt, parts of light and medium oils obtained by vacuum distillation of crude oil, which is characterized by a flash point of at least 150 ° C and a viscosity at 50 ° C of 16-22 mm ² .s ^_1 3, 0 parts by weight, parts by weight of wine fat, 1 parts by weight, finely ground graphite, pre-processed on a mineral oil paste friction device characterized by a minimum flash point of 150 ° C and a viscosity in the range of 16-22 mnAs ¹ at 50 ° C. The mixture is well homogenized and cooled to 40 ° C.

84 parts by weight of carboxymethylcellulose solution are prepared in a separate vessel by dissolving 3 parts by weight in 81 parts by weight of water. To this amount of the solution was added 2 parts by weight of sodium dinaphthyl methane disulfonate. The two basic solutions are mixed and homogenized in a duplicator boiler. To the emulsion thus obtained, 0.5 parts by weight of iron-iron oxide having a particle size of 0.1 to 2 mm is added and everything is thoroughly homogenized.

Example 2

Double jacketed boiler is inserted 6 wt. Parts of light and medium oils obtained by vacuum distillation of crude oil, which is characterized by a minimum flash point of 150 degrees Celsius and a viscosity of 16 mm ² to 2i2 ^_1 s at 50 ° C, 3.3 wt, parts of lanolin. The mixture is heated to 70 DEG C. and then it is dissolved, while stirring, 1.7 parts by weight of a portion of ethoxylated fatty alcohols having from 12 to 18 carbon atoms per molecule and 10 to 20 cells of ethylene oxide per molecule, 0.7 parts by weight of nonylphenyldodecyl glycol ether. 1.5 parts by weight of a portion of finely ground graphite pre-treated on a mineral oil paste friction device. In a separate container, a solution of 84 parts by weight of carboxymethylcellulose is prepared by dissolving 3 parts by weight of carboxymethylcellulose in 81 parts by weight of water. To this amount of solution was added 2 wt. Parts of sodium dinaphthyl methane disulfonate and 3 wt. Parts of hydrate and a modification of ferric oxide having a particle size of 0.1 to 2 mm. Both of these stock solutions are mixed and homogenized in a duplicator boiler at 40 ° C.

Example 3

In a duplicator boiler equipped with a stirrer, 5.8 parts by weight of a mixture of light and medium mineral oils obtained by distillation of oil are heated, characterized by a flash point of at least 150 ° C and a scoring ranging from 16 to 22 mm ² . ^-1 at 50 ° C, at a temperature of 70 to 80 ° C. 1.55 parts by weight of ethoxylated C 12 -C 18 fatty alcohol and 0.6 parts by weight of nonylphenyldodecyl glycol ether are dissolved in the oil thus heated. The mixture was homogenized and cooled to 40 ° C. 2.9 parts by weight, parts by weight of wine fat, 2 parts by weight, parts of finely milled graphite pre-treated by friction smearing with mineral oil, 0.1 parts by weight, parts of aluminum powder processed on a friction device, are gradually added thereto. with a mineral oil, 1.2 parts by weight of a part of the oleic acid condensation product with diethylenetriamine dissolved in an excess of oleic acid, the amount of which is given by an acid number of 100 mg KOH / g, 8 parts by weight of zirconia. In a separate vessel, a solution of carboxymethylcellulose is prepared by dissolving 2 parts by weight of carboxymethyl cellulose in 81 parts by weight of water. 2.1 parts by weight of sodium dinaphthyl methane disulfonate are added to the solution. In the duplicator boiler, the two basic solutions are mixed and homogenized to form a separating and lubricating agent.

Example 4

A mixture of 50 parts by weight of parts of cylindrical oil having a kinematic viscosity of 37 to 53 mm ² / s at 100 ° C, a flash point in an open crucible of 285 ° C and 10 parts by weight of paraffin freezing point 58 to 60 degrees Celsius is heated in the vessel. After the paraffin has melted and the temperature of the homogenized bath has dropped to 60 degrees Celsius, 30 parts by weight, parts of graphite, 9.5 parts by weight, parts of hydrate and modification of iron oxide and 9.5 parts by weight of aluminum hydride are gradually poured into the vessel.

Example 5

A mixture of 30 parts by weight of cylindrical oil having a kinematic viscosity of 25 to 37 mm ² · s · ¹ at 100 ° C, a flash point in an open crucible of 240 ° C and 20 parts by weight of paraffin point solidified 56 to 58 degrees Colsia. After the paraffin has melted and the temperature of the homogenized bath has dropped to 65 ° C, 40 parts by weight, parts of finely ground graphite and 1 part, part of hydrate and modification of ferric oxide are gradually added to the vessel with vigorous stirring.

Example 6

A mixture of 30 wt. Parts of light and medium oils obtained by vacuum distillation of oil is heated in the vessel. ^the TERA charalkterizov ^plated on bo ^d em and flare! es ^P on 15 ^0C. vtetozifou ^{EXAMPLE 50} DEG C. ¹⁶ to 22 mm ^{2 1st 50} parts by weight of oil obtained by extraction -odasfaltov ^and itself and ^d t parafinovámm ^EZK ACTIVE okjů zh RHM ^{y p} o va ^to UOV ^s ro ^py distillation. ¹⁰ parts mot ^{h p} arafinu freezing point of 56 and ⁵⁸ ° C. 5 wt. Parts of finely ground graphite processed ^d o ^{p y} nat frequently with ^{some of} them. ^p zhomogenlzované about the temperature bath at 70 ° C with vigorous stirring, 2 wt. Parts ^alkyl dapper ^Cart with titanium ^f orme ^of finely ground pigment and 1 wt. % of aluminum hydride.

EXAMPLE ⁷ n ^Aad about ^BE was heated ^{Ri á 3} 0 wt. ^d clay ^for extra ke ^for deasphalting oil obtained and also ^the ACTIVE odparaftnovámm ^of oil from ^the LYC ^hp of ^the VA uové ^d ^ e ^ t íilaci ro ^py. mixture ^{of 50} wt. light and medium oils obtained by vacuum distillation of crude oil. which is charalkterizována em ^b o ^{d flash-l} es ^P o ^{N 150} ° C, and a vis ^the Ozitech at ⁵⁰ ° C ^16-2 2 ^mm2 .s ^_1, 5 weight parts of paraffin solidification point 56-58 ° C. 10 wt. parts of aluminum powder and 7 wt. ^{parts of} finely mteteho ^g ra ITU Processed ^{f eh d} of the paste natěsněním. At 70 DEG C. with intensive homogenization of the bath is stirred into 9.5 'materials, parts -увИСп ^ и Πΐί ^ ι ^ ϋ ^ ήΐ ^ ι ^ Ι ^ ο as finely ground ^{of ras p} u.

Separating and lubricating ^P according ^to environment and community .přfcladu 1 was tested during the pressure casting of ferrous alloys. It was applied to the mold by spraying with a pneumatic gun before each casting. The formulation was diluted with water before application in a ratio of 1 part release agent to 10 ^parts of a ^dy. Of ^the ous ^ky for ^the Azal ^y. the formulation has to ^b r ^{s s} Lubrication and separating properties. ^In the form of e ^Tail No deposits do not form. Cooling e ^f e ^kt dlícího and lubricating Prostřeno ^would l very good. which resulted in an increase in the service life of the shaped insert. In tests Vol ^ETS COMES ^some hundred ^p ^ m Nara her from moderate number ^of lived, complex and separating castings appeared .mazací ability and cooling ability is not ^d & Oth n ^a. Délire lubricant rostro ^{d p} e ^k e ^dl after ^comm la ^d u 1 is ^h o ^{d p} ro Nu simple were cast in the ratio Re ^ga ou in ^d and 1: 15. For moderately complex in .poměru max. 1: 10 .

The separating and lubricating agent according to the example showed an increased lubrication in the technological tests. separation and cooling capability compared to example 1. For medium complex iron alloy castings at a 1: 10 dilution, the efficiency of the separating and lubricating agent was still quite satisfactory. U - - very complicated cast b ^y lo be ^p ro Securing ^d OSTA ^C No íičrnnosti reduced: Re ^ga .m in ou ^{d P e} r om 1: 5. The separating agent and lubricant according to Example 2 is suitable for treating medium. complicated. ^f orem.

Separating and lubricating agent according to. The example was successfully used for the treatment of very complex forms. The degree of dilution with water after ^Hyb oval in the range of 1 part ^d ělicího environment ⁷ to I ⁵ says ^profiles waters ^y. A good ^{e s} cooling effect resulted by reducing the thermal stress on the material shape and the insert thereby increasing its votnos F ^{and Ti.} Divides a lubricating rosti'e ^p e ^{d d k} VHO Nu ^P ro treated složitýcli molds at ndlévání ferroalloys.

Separating and lubricating compositions of Example 4. 5, 6 and 7 are pa ^ a ^ -a .nanášen ILTE consistency to form .pomocí brushes for whom we ^coasters. Mimofo ^would l ^y t ^y to ^{p y} COMPOSITIONS according to Examples 6 and 7 also used diluted. and then applied by spraying with compressed air guns. U - all Focht prostrata ^dk of the reflected zvýšené- Prior nky cooling. which are reflected in the increased mold life. Separating lubricants beneath at ^'k i ^d s 5 and 6 .měly cooling effect to lower ^y where said compositions of Examples 4 and 7. The compositions of Examples 6 -A 7 showed a concentrated state you ^ i etelrt cooler than diluted. Thus, the separating and lubricating means of Examples 5 and 6 are suitable for molds having a conventional thermal stress pattern. The separating and lubricating agents of Examples 4 and 7 can advantageously be used for the treatment of molds with high thermal stresses.

Claims (1)

Separating and lubricating agent for mold treatment. especially in die casting of iron alloys. .ohsahuh ^ finely ground graphite in an amount of ^{I 0} .5 to 50 wt. days. adn ^{or of} finely grinding the aluminum ^{of the p} rasa-The amount of ⁰ .05 to ¹⁵ weight :. ^{d of} clay .or hydrd hlimttlitný .množství of 0.05 to 10 wt. parts. Lene is dispersed in hydrocarbon or aqueous prostrata ^{says. EXAMPLE beta.} farm is considerably .ojích in ^the mixture. ^{characterized} značujím ^TI m. to ^give le contains any ^- exp ^{y es} pulcherrima iron. of tungsten. vanadium. bismuth. zirconium or titanium. alone or in combination in an amount of 0.5 to -10 weight. parts.