News Details
Furan resin coating crosslinking agent
2017-7-26 17:57:44
Furan resin coating crosslinking agent
The hardening characteristics of furan resin sand
1. The amount of resin is 1% of the sand content; The amount of furan resin crosslinking agent was 0.5%.
2. The relationship between the time of use and the time of decoloration and hardening characteristics is an important performance indicator of the sand of all chemical adhesion sand. The term can be used to refer to the period of time when the sand is mixed with sand (the same as the other chemical bond).
Demoulding time is from the beginning of the end of the sand, core box in the integrity of sand core (or not parting mold) hardening to satisfactorily remove sand core from the core box (or release), occurred without sand core (or sand mold) deformation of the required time interval. In actual production, the molds of sand cores are determined according to the size and complexity of the sand cores. As long as the mold is out, sand and sand are not deformed and collapsed.
Otherwise, it will make the mold difficult, even make the appearance, the core box damage, affect the productivity. From the benefit of production, it is hoped that the usable time of the mixed sand can be long, but the ideal time for production can reach 0.8, which is generally 0.35 ~ 0.6. There are many factors that influence the time of use and the time of die.
Experiments show that the adoption of raw sand, resin, catalyst type, quality and quantity, sand mixing process, environmental temperature and humidity, both to use time and stripping time has obvious effect, most affected by environmental temperature, and the addition amount of the catalyst. When the catalytic dose is the same, the temperature is not at the same time and the temperature is low. High temperature can be used short.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
The hardening characteristics of furan resin sand
1. The amount of resin is 1% of the sand content; The amount of furan resin crosslinking agent was 0.5%.
2. The relationship between the time of use and the time of decoloration and hardening characteristics is an important performance indicator of the sand of all chemical adhesion sand. The term can be used to refer to the period of time when the sand is mixed with sand (the same as the other chemical bond).
Demoulding time is from the beginning of the end of the sand, core box in the integrity of sand core (or not parting mold) hardening to satisfactorily remove sand core from the core box (or release), occurred without sand core (or sand mold) deformation of the required time interval. In actual production, the molds of sand cores are determined according to the size and complexity of the sand cores. As long as the mold is out, sand and sand are not deformed and collapsed.
Otherwise, it will make the mold difficult, even make the appearance, the core box damage, affect the productivity. From the benefit of production, it is hoped that the usable time of the mixed sand can be long, but the ideal time for production can reach 0.8, which is generally 0.35 ~ 0.6. There are many factors that influence the time of use and the time of die.
Experiments show that the adoption of raw sand, resin, catalyst type, quality and quantity, sand mixing process, environmental temperature and humidity, both to use time and stripping time has obvious effect, most affected by environmental temperature, and the addition amount of the catalyst. When the catalytic dose is the same, the temperature is not at the same time and the temperature is low. High temperature can be used short.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
The trend is to increase 10 ℃ temperature every time shortened 1/3 to 1/2. At room temperature, the amount of catalyst is decreased, and the time of application is obviously increased. The catalyst increases, the applicable time is shortened. However, the amount of catalyst added is more than a certain range, but the time change is not great, but it has a significant impact on the stripping time.
Temperature changes will significantly affect the stripping time, the trend is increasing every 5 ℃, demoulding shortens the time of 1/3 ~ 1/2.
Furan resin sand preparation technology
Mixing process: in order to make the resin, furan resin crosslinking agent, coupling agent can cover the surface of sand grain in the shortest time, the mixer should be mixed. Furan resin sand is not suitable for grinding wheel type sand mixer, most of which are used to stir the main continuous mixer or bowl mixer.
It should be pointed out that when the resin is added to the sand that has been mixed with the crosslinking agent, it should be mixed in a few seconds to a half minute, and the sand molding should be made as soon as possible. It is not possible to mix the sand in the mixer for too long.
Process characteristics of old sand regeneration process:
1. Furan resin sand is hardened at normal temperature using furan resin and acid crosslinking agent. The mold is of high strength and accurate size. In pouring metal liquid, furan resin is heated and decomposed, burning, large and concentrated, and it is easy to form stomatal defects.
2. Furan resin sand in the molding, the dry sand is poured into the sandbox, its fluidity is good, can not need to vigorously grind sand. The distance between sand grains is much larger than the clay sand, and the air permeability is good.
3. The furan resin sand, adopting fast and smooth pouring system, make the metal inside the mold quickly or to a certain height, the pressure of the liquid metal can prevent gas into the casting in the resin sand, forcing the gas escape from the permeability is good sand mold;
4. The furan resin sand mold heat conduction slow, it is not easy to casting cooling, due consideration when design riser casting cools, breakup sex good, deoxidization, convenient and casting surface roughness and size accuracy higher than clay sand castings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The trend is to increase 10 ℃ temperature every time shortened 1/3 to 1/2. At room temperature, the amount of catalyst is decreased, and the time of application is obviously increased. The catalyst increases, the applicable time is shortened. However, the amount of catalyst added is more than a certain range, but the time change is not great, but it has a significant impact on the stripping time.
Temperature changes will significantly affect the stripping time, the trend is increasing every 5 ℃, demoulding shortens the time of 1/3 ~ 1/2.
Furan resin sand preparation technology
Mixing process: in order to make the resin, furan resin crosslinking agent, coupling agent can cover the surface of sand grain in the shortest time, the mixer should be mixed. Furan resin sand is not suitable for grinding wheel type sand mixer, most of which are used to stir the main continuous mixer or bowl mixer.
It should be pointed out that when the resin is added to the sand that has been mixed with the crosslinking agent, it should be mixed in a few seconds to a half minute, and the sand molding should be made as soon as possible. It is not possible to mix the sand in the mixer for too long.
Process characteristics of old sand regeneration process:
1. Furan resin sand is hardened at normal temperature using furan resin and acid crosslinking agent. The mold is of high strength and accurate size. In pouring metal liquid, furan resin is heated and decomposed, burning, large and concentrated, and it is easy to form stomatal defects.
2. Furan resin sand in the molding, the dry sand is poured into the sandbox, its fluidity is good, can not need to vigorously grind sand. The distance between sand grains is much larger than the clay sand, and the air permeability is good.
3. The furan resin sand, adopting fast and smooth pouring system, make the metal inside the mold quickly or to a certain height, the pressure of the liquid metal can prevent gas into the casting in the resin sand, forcing the gas escape from the permeability is good sand mold;
4. The furan resin sand mold heat conduction slow, it is not easy to casting cooling, due consideration when design riser casting cools, breakup sex good, deoxidization, convenient and casting surface roughness and size accuracy higher than clay sand castings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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