Sanzhuji explains phenolic resin laminated sand
1. Equipment composition and working principle
The whole set of equipment consists of raw sand bin, bucket elevator, weighing hopper, heating furnace, sand mixer, vibrating screen, cooling drum, finished product bin elevator, finished product bin and other hosts, with fully automatic control of the electrical control system, gas circuit, water circuit, dust removal and fuel system to form a completed production under.1.1 Raw sand bin
The raw sand bin is divided into three material levels, which can store three different types of raw sand, in the same sand bin. During automatic production, the raw sand in the three bins can be fed in different proportions to produce higher strength laminated sand.
1.2 Bucket elevator
The bucket elevator is divided into two types of transmission: belt type and chain type.
Belt type structure: using customized 10mm high wear-resistant rubber belt. It has the advantages of having long life and more durable. The belt service life is more than 5 years under the condition of continuous production all day long.
Chain type structure: using chain drive, compared with belt type elevator, has higher lifting height. sanzhuji will match according to the equipment required, or make special customization according to customer needs.
1.3 Weighing hopper
The weighing hopper is equipped with automatic weighing device, and the automatic production line can set the amount of material to be added to each furnace. The accuracy error of the weighing hopper is within 0.1kg, so that the weight of the sand heated each time is nearly the same, ensuring the balanced quality of the produced laminated sand.
1.4 Heating furnace
The laminated sand heating furnace produced by sanzhuji is the natural gas flame true spray method, which is the leading laminated sand heating furnace in China at present. The traditional heating furnace transmits heat through medium, and the heat loss after conduction is serious, and the heat utilization rate is only 30%~40%. It is a great waste of energy and unevenly heated. The direct injection heating method increases the heat utilization to more than 95%, reduces the production cost and increases the production output. The unique internal structure of the furnace chamber makes the original material in the furnace cavity is a waterfall flow of dispersed heating, heating effect is more uniform. The scientific furnace structure with fully automatic control system ensures the stable quality of finished sand in each furnace.
1.5 Sand Blender
The heated raw sand is contacted with solid phenolic resin in the sand blender, and the heated heat is used to melt the resin, which is stirred in the sand blender to make the resin adhere evenly to the surface of the raw sand.
The choice of resin generally needs to meet the following characteristics: polymerization speed should be fast, bonding strength should be high, and gas emission should be low. The softening point is an important heating furnace sign of the resin polymerization degree, the softening point of different resins, the bond strength also exists a certain difference, in the process of making laminated sand should be reasonable with the proportion.
and at a certain point in time need to join the curing agent, the role of the curing agent is to phenolic resin in the case of thermal effects of a series of curing reaction, the formation of a non-melt insoluble material. So in the production of laminated sand before to choose a good curing agent will be curing agent in accordance with a certain ratio into the production process, can effectively improve the performance of laminated sand.
sanzhuji production line of laminated sand with a perfect automatic control system, can automatically control the addition time of various auxiliary materials, sand mixing time, the number of additives, the error within 0.01kg. It can avoid the unstable quality caused by the operation problem of production workers.
The standard package comes with resin bin*2, urotropine bin*1, calcium stearate bin*1, and can be customized service according to customer''''''''''''''''''''''''''''''''s needs. For example, supporting liquid resin bin or other auxiliary material bin, etc.
1.6 Vibrating sieve
The sand grains are sieved and shattered in the vibrating sieve after being coated by the sand mixing machine, which evenly disperses the clad sand that condenses into lumps and effectively cools and improves the quality of the finished sand. sanzhuji produces vibrating sieve in two forms: rotary vibrating sieve and square sieve.
The rotary vibrating screen has the advantages of convenient screen change, only 3~5 minutes, simple operation and easy cleaning. The square sieve has two layers of screens for better uniformity after screening. Or we can customize according to the customer''''''''''''''''''''''''''''''''s charter requirements.
1.7 Cooling drum
The cooling drum is used to cool the sand quickly after lamination, and the front section is cooled and the rear section is screened. The laminated sand enters the cyclone cooler under the action of the induced draft fan and the material is in full contact with the cooling medium. The sand is cooled quickly by counterflow. The fan end is connected with dust collector to prevent dust from flying. It has the advantages of sufficient cooling, uniform cooling, large output, low energy consumption, stable operation, etc.
1.8 Finished product bin
After cooling, the overcoated sand is sent to the finished product bin for storage through the bucket elevator again. Standard finished product capacity is 5 tons. It can be customized according to customer''''''''s demand.
1.9 Electrical system
This equipment adopts 380V AC power supply, and each equipment can be started and stopped individually for debugging. It can also be fully automatic production after setting the parameters. The electrical parts have complete protection and display functions, and the PLC adopts Siemens or Omron system, which can be customized according to the demand.
1.10 Dust removal
As the laminated sand will inevitably produce some dust in the process of heating, mixing and flowing; the high temperature silica sand mixed with resin, urotropine and calcium stearate will produce a lot of fumes and water mist, so it is necessary to equip the complete set of equipment with dust removal system. The complete set of equipment adopts cloth bag dust collector + cyclone dust collector, which can realize dust removal efficiently and meet the required emission standards.
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.
