Product description :
material : stainless steel 304,316,316l
process : precision casting
dimension : according to your drawings
surface treatment : polishing ,anodize ,chrome plating ,zinc plating ,nickel plating
| Process | PRECISION CASTING |
| Specification | 1.Material: steel,stainless steel, carbon steel, alloy steel and so on.
2.Standard: ASTM\DIN\BS\JIS\GB.
3.Surface finish: Machining, shot blasting,sand blasting, polishing,painting,etc.
4.Weight: upto 300kg. |
| Production facility | 1.Casting facility:sand mixer,moulding machine,electric furnace,box resistance furnace, heat treatment furnace,shot-blasting machine, sand-blasting machine, medium-frequency induction furnace.
2.Machining facility: CNC, NC lathe,ordinary machine tools. |
| Heat treatment | Normalizing/Annealing/Quenching/Tempering. |
| Test facility | spectrometer, tensile test machine, hardness test machine,impact tester,CMM.
|
the processing of our precision casting
1. Process Design:Design the tooling according to customs' drawing or sample, set up the pouring system with CAE casting simulation software
2. Mould Fabrication:Transfer the drawing or sample into 3D drawing which is applied to aluminum or steel mould fabrication
3. Wax Injection:Mix liquid wax slurry and solid wax together, inject wax into metal mould, fetch it out after cooling
4. Wax Mold Assembly:Heat the stainless steel welding knife, weld the wax molds together on the gate stick according to technically designed
5. Dipping:The wax molds are dipped into waterglass solution, with surface coated by the solution
6. Stuccoing:Stucco the dipped wax molds with quartz sand, then dip into induration solution containing ammonium chloride & magnesium chloride and hang to dry. The whole process repeats 6 times
7. Wax Removal:Put the thick coated wax molds into wax removal gutter, keep heating. After lost all the wax only sand shell was left
8. Sand Shell Preheat:Heat the sand shell in order to strengthen the shell
9. Casting:Put the raw material into the induction furnace and melt, add with chemical composition per material spec. After the temperature of molten steel rises to about 1600 degrees, take a pre-pouring chemical analysis, if approved then pour liquid steel into the sand shell by ladle, make sure the shell is filled with liquid steel and then cool off, meanwhile take the testing bar for after-pouring analysis
10. Sand Shell Removal:Make the casting free from sand by shaking
11. Cutting:Oxyacetylene cut off the castings from gate stick
12. Grinding:Grind the ingate and defected surface with grinding wheel
13. Heat treatment:Heat treat the casting by nomalizing, annealing, quench+tempering, induction quenching, case hardening and Nitriding per material spec
14. Machining:Machine the castings by CNC according to drawing spec
15. Final inspection:Test the parts' mechanical properties by tension tester, impact tester, hardness tester, take NDT with X-ray, UT and M.P.T, final dimension inspection are down by CMM, Measures & Gauges, etc
16. Pack & Transport:After rust prevention, pack the parts into plywood or iron case for transportation.
Hebei Mingda International Trading Company is a trading company which is specialized in
Castings, forgings and machinery parts.
We have deep business interaction with manufactures in major cities of China, so we are quite
Flexible and confident to be any kind of casting products to be able to meet
Ourcustomers'request on quanlity and delivery time.
Our products include all kinds of raw castings to be made of ductile iron, grey iron, brass,
Stainless steel and aluminums, machined castings and forged parts. To make these parts
According to the customers' drawings, we have relative suitable production craft and
Equipments, such as resin sand, sand mould, hot core boxes, lost-wax, lost -foam and so on.
Specially for hydrant bodies and valves' bodies, we have collected rich experience for these
Products in the past 16 year's actual production, Now we are proud of our products with good
Surface and high quality material. Whatever, we have been trying our best to provide our
Customers with better quality castings by improving production crafts and more careful quality
Control.
Apart from buyers' requirements, we also have our own very strict quality assurance system,
That makes sure the buyer's demand more significant and it could be done exactly according to
Our customres'required Quality Standards. This saves much time and money for both sides.
From founded to now, our products arehighly recognized by our customers, Meantime we win a
Good reputation in the casting and machinery industry whoever from customers or our partners.
Now our products are mainly exporting to Germany, Sweden, UK, Denmark, France, USA,
Middle-East, and so on.
Looking Forward To Receiving Your Kind Favorable Reply At Your Earliest!
