How Sand Preparation Systems Work

1. The sand that needs to be regenerated and reused in the casting production by the mechanical strong grinding regenerator is generally
It refers to the sand molds and sand cores (including coated sand, resin sand, organic self-hardening sand shell sand, clay sand, etc.) which are burned or heated by high temperature metal liquid, with organic grease as binder, or after use. sand), single used sand and mixed used sand, etc. Used sand regeneration is a dry mechanical regeneration process, which is suitable for used sand regeneration places produced by castings with a certain production scale.
reason. The process is simple. Generally, the used sand after pouring and falling sand is cooled, crushed, screened and magnetically separated, and then mechanically rubbed with a powerful rubbing regenerator to obtain better used sand quality.

1.1 Grinding mechanism of strong grinding regenerator The powerful grinding regenerator is a kind of core equipment in the old sand regeneration technology, and it is a new type of mechanical dry regeneration device. It is suitable for the regeneration of waste sand such as organic grease used sand, coated sand, shell sand and clay sand.
1.11 The working mechanism of the strong grinding regenerator: the waste sand enters the regeneration chamber body, and is distributed in the working area of the grinding blade after being diverted by the diverter plate. The rubbing blades are respectively installed on three transmission spindles directly driven by the motor, and rotate in the same direction at a high speed to form convective rubbing of the old sand. Under the action of the refractor, the old sand is repeatedly rubbed by convection. At the same time, the air volume of the blower enters the bellows from the butterfly valve, and enters the chamber body through the boiling orifice plate to form a mixture of sand and gas, so that the old sand flows and boils in a state of flow and boiling. The strong rubbing of the state can achieve the purpose of stripping and regeneration.
1.12 Use the high-speed rotating grinding wheel (blade) to vigorously grind the old sand, and at the same time carry out boiling air separation to remove ash and cooling to achieve the effect of film removal and purification. Because of the dry mechanical grinding mechanism, it can adapt to the higher temperature of waste sand.
1.13 The dust airflow (including hot airflow) formed in the chamber is discharged from the dust removal tuyere. After a certain flow of convective rubbing, the regenerated sand is discharged from the sand outlet, and the discharged old sand has obvious cooling and particle purification effects. The strong grinding regenerator is the analysis and research object of the waste sand treatment produced by organic grease sand casting. Due to the different process of molding sand formability, the properties of the waste sand produced are also different. The foundry can choose and adjust the regeneration process according to the characteristics of casting production.

1.2 Grinding structure of powerful grinding regenerator The main structure of powerful grinding regenerator consists of upper chamber body (including boiling orifice plate), lower bellows grinding blade, drive motor, blower, machine base, sand inlet, sand outlet It is composed of a mouth and a dust-removing tuyere.

2. Several issues that should be paid attention to in the sand treatment system
2.1 Due to the wide application of high-efficiency molding production lines, the quality requirements for molding sand are getting higher and higher. Therefore, according to the requirements of the molding process, advanced and efficient sand mixing equipment and supporting sand processing lines should be adopted, and outdated old equipment should be eliminated to improve casting capacity, production efficiency and environmental protection.
2.2 The necessary shakeout equipment for the casting shakeout department should select advanced shakeout equipment according to the environmental protection requirements of the working conditions. The purpose is to improve production efficiency, reduce noise, and reduce the impact on the working environment.
2.3 The temperature of the hot old sand after the falling sand is high, and the vibrating conveyor should be used for transition during the transfer process, and it should be pretreated through relevant crushing, magnetic separation and necessary cooling equipment, and then the effect of grinding and regeneration is better.
2.4 Because the casting hot old sand contains high temperature, hot water vapor and iron impurities, it will directly cause damage to the equipment. Mainly manifested in the phenomenon of sticking sand, bonding strain, damage, aging, etc. on the equipment (pay attention to timely maintenance). Therefore, attention should be paid to the harm of hot old sand to sand processing equipment. Never use the sand temperature regulator as an old sand cooler. There is a fundamental difference between the two. In some foundry workshops, it is unreasonable to design and use sand temperature regulators to deal with the cooling of hot used sand in the cooling of used sand.
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2.5 Recycling of used sand has direct economic benefits for reducing costs and saving resources. When considering the replacement of equipment, the feasibility of the casting process should be considered, and the necessity of using the old sand regeneration process to realize online production operations or offline production operations should be considered.
2.6 The maintenance and maintenance of the sand treatment production line and the used sand recycling line should be on the agenda, pay attention to the maintenance first, and the maintenance later.
2.7 Small and medium-sized foundry enterprises should improve the level of mechanized operation in all aspects of foundry production, locally apply intelligent sensing technology, detect and monitor the production process, and upgrade the foundry in a planned way.

Qingdao Sanzhuji Equipment Manufacturing Co., Ltd. specializes in the production of Green Sand Molding Line,Self-hardening sand molding line,foundry machines,Sand molding machine,Sand casting equipment,sand mixer,GS high efficiency rotary mixer,Resin sand mixer,no-bake resin sand mixer,Jolt squeeze molding machine/Jolt-squeezing moulding machines,Multi- Piston Moulding Machine/Hydraulic multi-piston moulding machine,sand casting molding machine,sand reclamation equipment，foundry molding machine,flaskless moulding machine,shot blasting machine,dust collector,according to the amount of old sand recovered Carry out plan customization, and provide sand reclamation equipment installation, commissioning, and training. Welcome guests to visit the factory.