GS High Efficiency Rotor Sand Mixer Turnkey

Mixer of green sand of GS high efficiency rotor sand mixer
The new sand is conveyed to the new sand storage hopper by the conveying system and quantitatively added to the old sand and new sand mixing and weighing hopper by the belt feeder under the storage hopper. Coal powder, clay and dust are conveyed to the coal powder hopper, clay hopper and dust hopper respectively by the conveying system, and are quantitatively added to the auxiliary material weighing hopper by the screw feeder under their hoppers. When mixing sand, new sand, old sand and auxiliary materials are added into the sand mixer by the weighing hopper respectively, while water is added into the sand mixer quantitatively through the water tank via the weigher. The mixed sand is discharged to the sand storage hopper and discharged to the sand belt conveyor by the feeder under the storage hopper (or directly from the sand mixer to the sand belt conveyor) and sent to the molding department for molding. The old sand moisture and temperature detector controls the amount of water added to the sand mixer, and the sand quality online detector corrects the amount of water and clay added to the sand mixer in the next mill. Some of them also control the sand compacting rate through the online sand quality detector, so as to control the amount of water added in the current mill.

l、Raw materials
1.1 Raw sand
Most of the use of silica sand, both domestic silica sand, foreign silica sand, there is no report that the two silica sand inflatable properties have differences
Most of the use of grain size equivalent to No. 6 silica sand. For the importance of the quality of the casting table, sometimes also mixed with No. 7 silica sand.
1.2 Additives
1.21 Bentonite
The actual use of Ca-based and Na-based are used. select additives, in addition to consider the characteristics of the molding machine, should consider the object product
The product (pouring weight and shape, etc.), the ability of the sand box dismantling equipment.
1.22 Starch
A-based starch is the most effective in solving sand flushing and sand trapping defects. B-based starch can also be used. However, dextrin will significantly reduce the sand
fluidity, so it cannot be used.
1.23 Coal powder
Use more marine coal with about 8% ash.

2、The nature of blended sand is recommended
2.1 Moisture.
3~4%
To ensure that the CB value is appropriate moisture value, priority management CB value
2.2 CB value: 33~39%, in the stage of supplying sand to the molding machine, the CB value discharged from the sand mixer should be adjusted reasonably.
2.3 Compression strength (compressive): 10~14N/cm2 (1.0-14 kgf/ cm2)
2.4 Total clay content: 10-12%, which is to ensure water retention and reduce the variation of CB value.

3、Reference value
3.1 Air permeability：＞120
3.2le-Loss.3~4%
3.3 Active clay composition：6~8%
3.4Surface stability：＞85%
3.5 Compactness (CB value) : 33-38

4、Reference value of the additive rate (the rate added to the sand mixer)
4.1 Bentonite:0.3-0.6%
4.2 Starch: 0.03-0.1%
4.3 Coal powder:0.05-0.15%
The basic idea of supplementary addition is to replenish the loss caused by casting, and to keep the overall sand containing the most constant, the rate of addition depends on the sand / metal ratio (the ratio of each sand box).
Metal ratio (the ratio between the weight of each sand box and the weight of the mold), the heat loss tendency of the additives used varies.

5、Moisture
5.1 Weight expressed in %
(full weight - weight after drying) / full weight (moisture + sand)× 100 = moisture %
5.2 The compactness (CB value) has a close correlation with the amount of water, the more the amount of water increases, the larger the CB value. the higher the CB value, the poorer the filling of sand, and the poor flow of sand.

6、S/M ratio (sand/metal ratio)
6.1 Casting weight ratio corresponding to the weight of the mold (sand)
(S sand weight) / (M casting weight) = 6-12 (general)
6.2 Resistance
6.21 For the resistance of the vertical load of the casting mold, it is generally used at 0.09-0.16MPa.
It is possible to grasp the approximate standard of pressure collapse negative weight at the time of demolding process and load-bearing weight.
6.22 Example
The approximate standard of the crush weight of a mold with a die size of 400X500 and a compressive strength of 0.1MPa
0.4X0.5X0.1X1000000X0.4=8000N
(0.4=presumed % when connecting the mold pressure area)

7、Plate material and precautions
Calendered aluminum plate specifications in accordance with the provisions of jIS H 4000, the market has a variety of steel manufacturers'''' products for sale, if you want to buy thickness
Sanzhuji recommends that the off-box molding machine to A50S2P material as the standard. Material with a plate thickness of 30mm
The tolerance of dimensional accuracy is +0.15mm and the surface flatness is plus 0.4mm/1m. Therefore, only the periphery and holes need to be processed directly, and it can be used as a
The flat plate can be used by directly machining the periphery and holes.
As for the manufacturing precautions, if a large countersink is required for the assembly model, warpage may occur due to improper processing methods.
Therefore, care should be taken. If possible, it is advisable to add the obligation to check the flatness in the final state after the model is assembled.

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.