Yongkang Dongrun Casting Industry&Trade Co,.Ltd
Aluminum Sand Casting,Gravity Die Casting,Aluminum Die Casting
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E-Mail:dongrun@dongruncasting.com
Unlike most of our competition, we offer three types of castings –
aluminum sand casting,
gravity die casting and
aluminum die casting.
We can also provide tooling, CNC machining, polishing, plating, heat treatment, pressure test, vacuum Impregnation, assembly and testing for your orders.
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Sand Casting Process Manufacturer
The Introduction : Sand Casting Process
Sand casting is used to make large parts, suitable for Aluminum alloy, Iron, Steel and Brass metal. There are two techniques: green sand casting and resin sand casting. The sand cast molds are same for the two ways, their difference is only sand. Green sand is for green sand casting process, which is the most common used by foundries; resin sand is for resin sand casting process or making cores.
·The "green sand" consists of mixtures of sand, clay and moisture.
·The "resin sand" consists of sand and synthetic binders cured thermally or chemically
·The cores used for forming the inside shape of hollow parts of the casting are
As usually, the material of sand casting moulds is wood, silica or aluminum alloy. If the aluminum part is small, the quantity is less and the structure of castings is easy, we make the casting parts by wood mold or silica mold, such as furniture components, architectural components; If the structure is complex, the aluminum product is very big, or the order will be continued several, we suggest to make the sand casting parts by aluminum alloy mold, such as engine blocks, cylinder heads, housing.
The sand mould is re-usable and permanent patterns, there are some pouring cups and risers on the moulds. How to set up the pouring cup and riser is the key in moulds design
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Aluminum FoundryDescription: In Dongrun Casting aluminium foundry, there are five large-scale sand casting product lines and twenty medium sand casting product platforms in the factory. -
Top pattern and bottom patternDescription
1. In Dongrun Casting Aluminum foundry, there are 5 five people who are skilled pattern maker to build patterns, using wood, aluminum, or resin. As usually, 1 set mold including top pattern and bottom. If the structure of mold is very complex, there is a sliding block, named core too. Such cores, sometimes reinforced by wires, are used to create under cut profiles and cavities which cannot be molded with the cope and drag, such as the interior passages of housing or cooling passages in CAC tanks. -
Sand mould--remove the patternDescription : 2. For our American project—flat on one side; ribs on other side, closed at the bottom and top together, be filled with prepared casting sand or green sand—a slightly moist mixture of sand and clay; The color is red, so aluminum sand casting is named red sand casting; if make cast iron, the color of sand is black, so iron sand casting is named black sand cast. The sand is packed in through a vibratory process or press process. The pattern is placed on the sand. Other sand is rammed over and around the pattern. Finally a cover is placed on the box and it is turned and unlatched, so that the halves of the mold may be parted and the pattern with its sprue and vent patterns removed. Additional sizing may be added and any defects introduced by the removal of the pattern are corrected. The box is closed again. This forms a "green" mold which must be dried to receive the hot aluminum. If the mold is not sufficiently dried a steam explosion can occur that can throw molten aluminum. Sand may also be bonded by chemical binders, such as furane resins or amine-hardened resins. -
Fill the mold cavity with molten aluminumDescription : 3. When we make sand moulds, there are some paths for the entrance of aluminum into the mold cavity constitute the runner system and include the sprue, various feeders which maintain a good aluminum 'feed', and in-gates which attach the runner system to the casting cavity. Gas and steam generated during casting exit through the permeable sand or via risers, which are added either in the pattern itself, or as separate pieces. To be free of any porosity, we will place filter screens on the sprues. -
Break away the sand mold and remove the castingDescription:
4. When the aluminum is cool, break away the sand mold and remove the casting. -
Remove sandDescription: 5. Finishing the casting, we will remove the sand on the casting by washing or shot blasting. Then future machining, such as drilling and tapping, milling, lathe work and grinding.
Sand Casting, Aluminum Sand Casting, Gravity Die Casting, Aluminum Die Casting, Die Casting, Aluminum Casting Processes, Sand Casting and Die Casting Processes, Permanent mold casting, Die Casting manufacture, Green Sand Molds, Aluminium Casting Foundry, Zinc die casting
