CN107876692B - High-performance water-based metal die-casting release agent - Google Patents
High-performance water-based metal die-casting release agent Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2209—Selection of die materials
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Abstract
The invention provides a high-performance water-based metal die-casting release agent, which comprises the following components: the functional organic composition comprises high-temperature-resistant resin, high-temperature-resistant silicone oil, mineral oil, animal and vegetable oil and the like; the auxiliary agent comprises a nonionic surfactant, a defoaming agent, a preservative, a bactericide and the like; and a solvent, specifically deionized water. The high-performance water-based aluminum alloy die-casting release agent is light yellow gray emulsion, has the kinematic viscosity of 5-38s, the particle size distribution of 200-500nm, the emulsion stability, good lubricating and demolding performance in the process of die-casting aluminum technology, good cooling performance, heat insulation performance, good high-temperature wettability and lubricating performance, prevents die sticking, pulling damage, carbon accumulation and coking, makes castings white and bright, has no smoke and pollution, keeps the environment clean, and is convenient to use. The invention also discloses a preparation method and application of the metal die-casting release agent.
Description
Technical Field
The invention relates to the technical field of release agents, in particular to a high-performance water-based metal die-casting release agent.
Background
As metal forming methods using a die, there are a casting method and a die forging method. Examples of the casting method include a low-pressure casting method, a press casting method, and the like. In such a casting method, before filling the mold with the molten metal, a mold release agent is used for the purpose of suppressing reaction (fusion) between the mold and the molten metal and also contributing to mold release of the molded product. In a low-pressure casting method, a squeeze casting method or the like, which is one of the pressure casting methods, due to a low speed of filling a cavity with a molten metal such as an aluminum alloy, the mold temperature and the molten metal temperature are kept higher than in a typical high-speed pressure casting method to ensure the fluidity of the molten metal during filling. As a mold release agent suitable for such high-temperature molding, a mold release agent containing powder is used in most cases to provide a heat insulating effect. Generally, the mold release agent includes a water-based type and an oil-based type. For example, in the casting method, a mold release agent is applied to a casting mold by spraying to form a coating layer before pouring so as to use the casting mold. However, the components of the conventional release agent are easily evaporated or changed into decomposition gas due to heat, so that it is difficult to ensure the residual amount of the lubricating component in the high-temperature die, and the die-cast metal surface often forms a porous structure, a burr structure and the like.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a metal die casting release agent which is applied to the surface of a metal die before casting and consists of a functional organic composition, an auxiliary agent and a solvent; the functional organic composition comprises high-temperature-resistant resin, high-temperature-resistant silicone oil, mineral oil and animal and vegetable oil; the auxiliary agent comprises a nonionic surfactant, a defoaming agent, a preservative and a bactericide; the solvent is deionized water.
In the metal die casting release agent, the mass percent of the functional organic composition agent is 15.0-50.0%, the mass percent of the auxiliary agent is 5.0-10.0%, and the mass percent of the solvent is 40.0-80.0%.
In the metal die-casting release agent, the mass percent of the high-temperature-resistant resin is 2.0-5.0%, the mass percent of the high-temperature-resistant silicone oil is 10.0-30.0%, the mass percent of the mineral oil is 1.0-10.0%, and the mass percent of the animal and vegetable oil is 2.0-5.0%.
In the metal die casting release agent, the mass percent of the nonionic surfactant is 2.0-5.0%, the mass percent of the defoaming agent is 0.02-1.0%, the mass percent of the preservative is 0.01-1.0%, and the mass percent of the bactericide is 0.01-0.05%.
In the metal die casting release agent provided by the invention, the high-temperature resistant resin is one or any combination of more than two of high-carbonization phenolic resin, naphthol-phenolic resin or hybrid phenolic resin, and is preferably high-carbonization phenolic resin.
In the metal die-casting release agent provided by the invention, the high-temperature-resistant silicone oil is one or any combination of more than two of long-chain alkyl aryl modified silicone oil, long-chain alkyl silicone oil and aryl modified silicone oil, and preferably the long-chain alkyl aryl modified silicone oil with the viscosity of 350-2000 cps.
In the metal die casting release agent provided by the invention, the mineral oil has a kinematic viscosity of 100mm at 40 DEG C2And the high-viscosity mineral oil is one or any combination of more than two of engine oil, gear lubricating oil, cylinder lubricating oil and bearing oil.
In the metal die-casting release agent provided by the invention, the animal and vegetable oil is one or any combination of more than two of rapeseed oil, soybean oil, coconut oil, palm oil, beef tallow and lard.
In the metal die-casting release agent provided by the invention, the nonionic surfactant is one or any combination of more than two of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene polyoxypropylene ether, sorbitan fatty acid ester and castor oil polyoxyethylene ether.
In the metal die-casting release agent provided by the invention, the preservative is triethanolamine, diethanolamine, monoethanolamine, hexamethylenetetramine, benzotriazole or methyl benzotriazole, and benzotriazole is preferred.
In the metal die casting release agent provided by the invention, the bactericide is one or any combination of more than two of isothiazolinone, 4-chloro-3-methyl-phenol, s-triazine and glutaraldehyde.
The invention also provides a preparation method of the metal die-casting release agent, which comprises the following steps:
mixing an oil phase system: adding the functional organic composition and the nonionic surfactant into a multifunctional reaction kettle, and uniformly stirring to form an oil phase system;
W/O Water-in-oil: stirring at the rotating speed of 1000r/min, dropwise adding water into the oil phase system to form a water-in-oil system, wherein the dropwise adding water accounts for 1/10 of the mass of the oil phase system, the water-in-oil system is subjected to phase transformation along with the increase of the dropwise adding water to form an O/W oil-in-water system, after the phase transformation, stopping dropwise adding water into the oil phase system, and continuously stirring for 5-10 min;
O/W oil-in-water: continuously injecting water into the oil-in-water system for 3-5min, wherein the water injection amount is 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min to prepare an oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water to obtain a finished product pre-emulsion;
preparing a formula: adding the finished product pre-emulsion, the preservative, the bactericide and the rest of the solvent into a stirring cylinder according to a specified ratio to prepare the emulsion with the particle size of 200-500 nm.
The invention also proposes the use of a metal die casting release agent for application on the mould surface of a metal mould prior to casting as a release agent, preferably as an aluminium alloy die casting release agent.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention introduces the high-carbonization phenolic resin with good temperature resistance into the formula system, maintains the residual amount in the high-temperature die, preferably selects the thermosetting high-molecular substance, solves the problems that the components of the die release agent are easy to evaporate or become decomposed gas due to heat, ensures the residual amount in the high-temperature die of the lubricating component to be difficult, and further solves the common porous problem of the aluminum alloy die-casting release agent.
(2) The present invention employs a silicon-containing compound, such as a silicone resin having a siloxane bond as a main chain. Compared with the skeleton of a common high molecular organic compound, namely carbon-carbon bond, the bond energy of siloxane bond is stronger. Therefore, the high-temperature heat resistance is strong. The selected alkyl aryl silicone oil can solve the problems of high-temperature lubrication and demoulding performance.
(3) The invention also introduces mineral oil and animal and vegetable oil, which can solve the problem of high-temperature wettability of the molding agent. High dilution multiple, good cooling and heat insulation performance, and is beneficial to more effective and performance of all functional components in a formula system.
(4) Particularly, the release agent is used in the aluminum alloy die-casting process without smoke and pollution, so that the environment is kept clean and healthy; and the use is convenient, and the automatic production is facilitated.
Detailed Description
The components, preparation and use of the metal die casting release agent proposed by the present invention will now be described in more detail, wherein preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
The metal die casting release agent can be applied to the surface of a metal die before casting, and consists of 15.0-50.0% of functional organic composition, 5.0-10.0% of auxiliary agent and 40.0-80.0% of solvent; the functional organic composition comprises 2.0-5.0% of high-temperature resistant resin, 10.0-30.0% of high-temperature resistant silicone oil, 1.0-10.0% of mineral oil and 2.0-5.0% of animal and vegetable oil; the auxiliary agent comprises 2.0-5.0% of nonionic surfactant, 0.02-1.0% of defoaming agent, 0.01-1.0% of preservative and 0.01-0.05% of bactericide; the solvent is deionized water.
(with respect to functional organic compositions)
The high-temperature-resistant resin contained in the functional organic composition mainly refers to high-carbonized phenolic resin, naphthol-phenolic resin and hybrid phenolic resin, preferably the high-carbonized phenolic resin, is more economical in price compared with other phenolic resins, and is characterized in that the high-temperature-resistant resin is prepared by combining certain phenol, alkylphenol and aryl phenol and then mixing the phenol, the alkylphenol and formaldehyde according to a certain proportion and a certain process, and has very excellent heat resistance, wherein the thermal weight loss at 350 ℃ is within 3 percent, the thermal weight loss at 400 ℃ is within 3.5 percent, and the thermal weight loss at 450 ℃ is within 5 percent.
The high temperature resistant silicone oil contained in the functional organic composition is generally long chain alkyl aryl modified silicone oil, preferably with the viscosity of 350-2000cps, preferably with the trade mark of X-22-1877, Beacon chemistry.
The mineral oil contained in the functional organic composition mainly means a high-viscosity mineral oil which can thicken a lubricating film in a temperature range of 150 to 300 ℃, has excellent lubricity and a high viscosity of 100cps or more in kinematic viscosity at 40 ℃, and is one or any combination of two or more of engine oil, gear lubricant oil, cylinder lubricant oil and bearing oil. Preferably, the ignition point is 250 ℃ or higher, and the brand is N460, Nissan Petroleum Co.
The animal and vegetable oils contained in the functional organic composition are animal and vegetable oils and higher fatty acid esters, and the animal and vegetable oils are excellent in lubricating properties at a temperature of 250 ℃ or lower. Animal and vegetable oils and fats include: animal and vegetable oil and fat such as rapeseed oil, soybean oil, coconut oil, palm oil, beef tallow, lard, etc., preferably refined industrial first-grade rapeseed oil.
(about auxiliary)
The nonionic surfactant contained in the auxiliary agent is one or more of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate, fatty alcohol-polyoxyethylene polyoxypropylene ether, sorbitan fatty acid ester, castor oil polyoxyethylene ether and the like in any combination. Because two or more than two emulsifiers with different properties (hydrophilicity and lipophilicity) are compounded for use, the emulsifiers with different properties are gradually transited from hydrophilicity to lipophilicity, the obtained emulsion is better, and the composition of the fatty alcohol polyoxyethylene ether AEO-3, tridecanol polyoxyethylene ether 1310 and Span-80 composite emulsifier is preferred.
The antiseptic contained in the auxiliary agent comprises triethanolamine, diethanolamine, monoethanolamine, hexamethylenetetramine, benzotriazole and methyl benzotriazole, preferably benzotriazole.
The bactericide contained in the auxiliary agent is one or any combination of more than two of isothiazolinone, benzisothiazolone, 4-chloro-3-methyl-phenol, s-triazine and glutaraldehyde.
(preparation method)
The preparation method of the metal die-casting release agent comprises the following steps:
mixing an oil phase system: adding the functional organic composition and the nonionic surfactant into a multifunctional reaction kettle, and uniformly stirring to form an oil phase system;
W/O Water-in-oil: stirring at the rotating speed of 1000r/min, dropwise adding water into the oil phase system to form a water-in-oil system, wherein the dropwise adding water accounts for 1/10 of the mass of the oil phase system, the water-in-oil system is subjected to phase transformation along with the increase of the dropwise adding water to form an O/W oil-in-water system, after the phase transformation, stopping dropwise adding water into the oil phase system, and continuously stirring for 5-10 min;
O/W oil-in-water: continuously injecting water into the oil-in-water system for 3-5min, wherein the water injection amount is 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min to prepare an oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water to obtain a finished product pre-emulsion;
preparing a formula: adding the finished product pre-emulsion, the preservative, the bactericide and the rest of the solvent into a stirring cylinder according to a specified ratio to prepare the emulsion with the particle size of 200-500 nm.
The metal die-casting release agent prepared by the steps is light yellow gray emulsion, has the kinematic viscosity of 5-38s, the particle size distribution of 200-500nm, good stability, good lubricating and demolding performance in the process of die-casting aluminum, good cooling performance, heat insulating performance, good high-temperature wettability and lubricating performance, and can prevent die sticking, pulling damage, carbon accumulation and coking, so that a casting is white and bright, smoke and pollution are avoided, the environment is kept clean, and the use is convenient.
Example 1
This example 1 is a specific example of preparing a mold release agent suitable for die casting of an aluminum alloy. As shown in Table 1 below, this example contained 1.5 phr of high-carbon phenolic resin, 20.6 phr of high-temperature silicone oil, 10.0phr of refined rapeseed oil, 10.0phr of high-viscosity mineral oil, 3.0 phr of Span-80, 2.0 phr of 1310, 1.0 phr of AEO-3, 1.0 phr of triethanolamine, 0.03 phr of isothiazolinone, 0.01phr of benzisothiazolone, and 50.86 phr of solvent.
The preparation process comprises the following steps:
adding high-carbonization phenolic resin, high-temperature-resistant silicon oil, high-viscosity mineral oil, refined rapeseed oil, Span-80, AEO-3 and 1310 into a multifunctional reaction kettle, and heating and stirring uniformly to form an oil phase system. And then stirring at the rotating speed of 1000r/min, dripping water into the oil phase system, and forming an oil-in-water system after dripping for 20 min. Continuously injecting water into the system at a higher speed, finishing the addition for 3-5min, taking the water addition amount as 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min, preparing the oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water, thus obtaining the finished product pre-emulsion. Adding the triethanolamine, the isothiazolinone, the benzisothiazolone and the residual solvent into a stirring cylinder according to the specified proportion to prepare the emulsion with the particle size of 200-900 nm, and packaging.
The metal die casting release agent prepared by the steps is light yellow gray emulsion, the kinematic viscosity is 37.6s, and the particle size distribution is 480 nm.
Example 2
This example 2 is a specific example of preparing a mold release agent suitable for die casting of an aluminum alloy. As shown in Table 1 below, this example contained 1.0 phr of high-carbon phenolic resin, 24.0 phr of high-temperature silicone oil, 10.0phr of refined rapeseed oil, 7.5phr of high-viscosity mineral oil, 2.6 phr of Span-80, 2.0 phr of 1310, 1.0 phr of AEO-3, 1.0 phr of triethanolamine, 0.03 phr of isothiazolinone, 0.01phr of benzisothiazolone, and 50.86 phr of solvent.
The preparation process comprises the following steps:
adding high-carbonization phenolic resin, high-temperature-resistant silicon oil, high-viscosity mineral oil, refined rapeseed oil, Span-80, AEO-3 and 1310 into a multifunctional reaction kettle, and heating and stirring uniformly to form an oil phase system. And then stirring at the rotating speed of 1000r/min, dripping water into the oil phase system, and forming an oil-in-water system after dripping for 20 min. Continuously injecting water into the system at a higher speed, finishing the addition for 3-5min, taking the water addition amount as 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min, preparing the oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water, thus obtaining the finished product pre-emulsion. Adding the triethanolamine, the isothiazolinone, the benzisothiazolone and the residual solvent into a stirring cylinder according to the specified proportion to prepare the emulsion with the particle size of 200-900 nm, and packaging.
The metal die casting release agent prepared by the steps is light yellow gray emulsion, the kinematic viscosity is 35.5s, and the particle size distribution is 450 nm.
Example 3
This example 3 is a specific example of preparing a mold release agent suitable for die casting of an aluminum alloy. As shown in Table 1 below, this example contained 2.5 phr of high-carbon phenolic resin, 20.0 phr of high-temperature silicone oil, 10.0phr of refined rapeseed oil, 10.0phr of high-viscosity mineral oil, 2.6 phr of Span-80, 2.0 phr of 1310, 1.0 phr of AEO-3, 1.0 phr of triethanolamine, 0.03 phr of isothiazolinone, 0.01phr of benzisothiazolone, and 50.86 phr of solvent.
The preparation process comprises the following steps:
adding high-carbonization phenolic resin, high-temperature-resistant silicon oil, high-viscosity mineral oil, refined rapeseed oil, Span-80, AEO-3 and 1310 into a multifunctional reaction kettle, and heating and stirring uniformly to form an oil phase system. And then stirring at the rotating speed of 1000r/min, dripping water into the oil phase system, and forming an oil-in-water system after dripping for 20 min. Continuously injecting water into the system at a higher speed, finishing the addition for 3-5min, taking the water addition amount as 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min, preparing the oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water, thus obtaining the finished product pre-emulsion. Adding the triethanolamine, the isothiazolinone, the benzisothiazolone and the residual solvent into a stirring cylinder according to the specified proportion to prepare the emulsion with the particle size of 200-900 nm, and packaging.
The metal die casting release agent prepared by the steps is light yellow gray emulsion, the kinematic viscosity is 26.5s, and the particle size distribution is 680 nm.
Comparative example
This comparative example is a prior art technique for preparing a mold release agent suitable for die casting of aluminum alloys. As shown in Table 1 below, this example contained 25.0 phr of high temperature silicone oil, 10.0phr of refined rapeseed oil, 7.5phr of high viscosity mineral oil, 2.6 phr of span-80, 2.0 phr of 1310, 1.0 phr of AEO-3, 1.0 phr of triethanolamine, 0.03 phr of isothiazolinone, 0.01phr of benzisothiazolone, and 50.86 phr of solvent.
The preparation process comprises the following steps:
adding high-temperature-resistant silicon oil, high-viscosity mineral oil, refined rapeseed oil, Span-80, AEO-3 and 1310 into a multifunctional reaction kettle, and heating and stirring uniformly to form an oil phase system. And then stirring at the rotating speed of 1000r/min, dripping water into the oil phase system, and forming an oil-in-water system after dripping for 20 min. Continuously injecting water into the system at a higher speed, finishing the addition for 3-5min, taking the water addition amount as 1/3-1/2 of the oil phase system, increasing the rotating speed to 1500r/min, preparing the oil-in-water O/W pre-emulsion, increasing the rotating speed to 600r/min, and diluting the pre-emulsion to 50% of solid content by using water, thus obtaining the finished product pre-emulsion. Adding the triethanolamine, the isothiazolinone, the benzisothiazolone and the residual solvent into a stirring cylinder according to the specified proportion to prepare the emulsion with the particle size of 200-900 nm, and packaging.
The metal die casting release agent prepared by the steps is light yellow gray emulsion, the kinematic viscosity is 30.4s, and the particle size distribution is 550 nm.
TABLE 1 example formulations for high Performance aluminum alloy mold release agents
The aluminum alloy die casting release agents prepared in examples 1, 2, 3 and comparative example were subjected to the above performance tests, and the results of the performance tests are shown in table 2 below. The specific test modes are introduced in sequence as follows:
(1) fluidity test
1) Kinematic viscosity measurement
The time for a volume of demold to flow under gravity through a calibrated glass capillary viscometer was tested. The product of the capillary constant of the viscosity and the flow time, i.e. the kinematic viscosity of the liquid being tested at that temperature:
υ＝Ｃτ
in the formula, upsilon is the kinematic viscosity of the oil product and has unit mm2The,/s,. tau.is the time taken for the sample to flow out of the capillary for a certain volume, and is measured in s, kinematic viscosity at 40 ℃ by ASTM D445 (Ubbelohde viscometer).
2) Wettability
The steel plate is heated by a high-temperature electric furnace, and the temperature of the aluminum plate is continuously adjusted by a temperature controller. The electric furnace and the steel plate are placed at an inclination of 45 ℃, a manual sprayer is used for spraying at a fixed distance (about 15cm), and the highest temperature when the release agent just can form a film on the aluminum plate without flowing is the high-temperature wetting temperature.
(2) Stability test
1) Storage stability. And standing the prepared release agent for 7 d at room temperature, and observing whether a layering phenomenon exists or not.
2) And (3) shear stability. Diluting the prepared release agent by 150 times, and stirring for 10min at 3000rpm/min by using a high-speed stirrer, wherein the stability is obtained without demulsification, delamination and precipitation.
3) And (4) centrifugal stability. After being diluted by 150 times, the prepared release agent is centrifuged at 2500rpm/min for 20min without demulsification, delamination and precipitation, thus obtaining the stability.
4) And (3) thermal stability. The prepared release agent is heated and boiled in a test tube for 10min, and the stability is obtained without demulsification, delamination and precipitation.
(3) Heat resistance test
Taking 5mg stock solution, heating at the speed of 10 ℃/min under the air (air inlet speed of 100mL/min), and measuring the thermal behavior weight loss in the process of heating from room temperature to 500 ℃ by using a differential thermal balance.
(4) Particle size distribution test
The particle size and the polydispersity of the emulsion are measured by a Brookhaven90Plus laser particle sizer in America, and the measurement result is the average value of 5 instrument scanning results.
(5) Adhesion test
Before the test piece was subjected to the test, the test piece 15 was subjected to a dry burning at 200 ℃ for 30 minutes in an oven, and then the test piece was cooled overnight in a desiccator. Before testing, the mass of the test piece was measured accurately to the nearest 0.1mg unit.
The test piece coated with the release agent was placed in an oven at 105 ℃ for 30 minutes, then air-cooled, and cooled in a desiccator for a certain period of time. The mass of the test piece was measured to an accuracy of 0.1mg unit, and the amount of adhesion was calculated from the difference in mass between before and after the test.
The sticking efficiency is a result of comparing the actual sticking quality among the masses of the effective components contained in the applied release agent. The calculation method comprises the following steps: sticking efficiency (%) — sticking amount (mg)/amount of active ingredient (mg) × 100 in the applied release agent.
(6) Resistance to demolding test
An automatic tensile tester (trade name: Lub tester U) manufactured by MEC International, Inc. measures the resistance value of the mold release. The test plate for frictional resistance was made of SKD-61 material and had dimensions of 200 mm. times.200 mm. times.34 mm; the ring (ring) was manufactured using S45C material and size manufactured by MEC International: 75mm of inner diameter, 100mm of outer diameter and 50mm of height; ADC-12 material is used in the aluminum melt; the weight is iron, and the weight is 8.8 kg.
An ingot of aluminum was heated to 650 ℃ using a melting furnace for ceramics to prepare an aluminum melt.
The test plate was heated to a predetermined temperature by using a commercially available heater, and the test plate was vertically raised in front of the spraying device. The test piece was coated with a release agent under predetermined coating conditions using a spray device. On the test stand, the test plate was placed horizontally with the ring placed in the center. The ring was filled with 90cm of molten aluminum. After cooling for 40 seconds, the molten aluminum was solidified, and then a weight was slowly placed thereon, and the molten aluminum was stretched in the X direction using an automatic stretching machine. The mold release resistance was measured using a tensiometer in an automatic tensile tester.
TABLE 2 Performance test of high-performance aluminum alloy mold release agent
As can be seen from comparison of data in Table 2, the release agents prepared in examples 1, 2 and 3 are far higher than the residual amount of the comparative examples when the mold temperature reaches 400-450 ℃, so that the problems that the mold release agent components are easy to evaporate or become decomposed gas due to heat, the residual amount of the lubricating components in the high-temperature mold is difficult to ensure, and the common porosity problem of the aluminum alloy die casting release agent is solved.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A metal die casting release agent for application to the mold surface of a metal mold prior to casting, characterized by consisting of a functional organic composition, an auxiliary agent and a solvent; the functional organic composition comprises high-temperature-resistant resin, high-temperature-resistant silicone oil, mineral oil and animal and vegetable oil; the auxiliary agent comprises a nonionic surfactant, a defoaming agent, a preservative and a bactericide; the solvent is deionized water, wherein the high-temperature-resistant resin is high-carbonization phenolic resin; the high-temperature-resistant silicone oil is long-chain alkyl aryl modified silicone oil with the viscosity of 350-2000 cps; the mineral oil has a kinematic viscosity of 100mm at 40 deg.C2High viscosity mineral oils above s; the animal and vegetable oil is rapeseed oil; what is needed isThe nonionic surfactant is a composition of fatty alcohol-polyoxyethylene ether AEO-3, tridecanol polyoxyethylene ether 1310 and Span-80.
2. The metal die casting release agent according to claim 1, characterized in that in the metal die casting release agent, the mass percentage of the functional organic composition is 15.0 to 50.0%, the mass percentage of the auxiliary agent is 5.0 to 10.0%, and the mass percentage of the solvent is 40.0 to 80.0%.
3. The metal die casting release agent according to claim 1, wherein in the metal die casting release agent, the mass percentage of the high temperature resistant resin is 2.0 to 5.0%, the mass percentage of the high temperature resistant silicone oil is 10.0 to 30.0%, the mass percentage of the mineral oil is 1.0 to 10.0%, and the mass percentage of the animal and vegetable oil is 2.0 to 5.0%.
4. The metal die casting release agent according to claim 1, wherein the preservative is one or any combination of two or more of triethanolamine, diethanolamine, monoethanolamine, hexamethylenetetramine, benzotriazole or methylbenzotriazole.
5. The metal die casting mold release agent according to claim 1, wherein the bactericide is one or any combination of two or more of isothiazolinone, 4-chloro-3-methyl-phenol, s-triazine, and glutaraldehyde.
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| CN108788002B (en) * | 2018-08-29 | 2020-01-21 | 昆山帝邦铸造科技有限公司 | Heat-resistant aluminum alloy die-casting release agent and preparation method and use method thereof |
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