Jiangyin Longkang Metal Products Co., Ltd |
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Zinc Truck And Alloy Metal Car Toy Led Die Aluminium Casting Cast
Aluminum Parts Aluminium Casting Parts
Basic Information
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| As customer's requestments |
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Product Display
Oxidized slag inclusions
Defect features: Oxidation slag inclusions are mostly distributed
on the upper surface of the casting, at the corners of the casting
mold that are not ventilated. Fractures are mostly gray-white or
yellow, which can be found by X-ray fluoroscopy or machining, and
can also be found in alkali cleaning, pickling or anodizing.
cause:
1. The charge is not clean, and the amount of returned charge is
too much
2. Poor design of gating system
3. The slag in the alloy liquid is not cleaned up
4. Improper pouring operation, bringing in slag inclusions
5. The standing time after refining and metamorphism is not enough
Prevention method:
1. The charge should be sand blown, and the amount of returned
charge should be appropriately reduced
2. Improve the design of the gating system and improve its slag
blocking ability
3. Use appropriate flux to remove slag
4. When pouring, it should be stable and pay attention to slag
blocking
5. After refining, the alloy liquid should be left for a certain
period of time before pouring
stomatal bubble
Defect characteristics: The pores in the wall of the three castings
are generally round or oval, with a smooth surface, usually shiny
oxide skin, and sometimes oily yellow. Surface pores and air
bubbles can be found by sandblasting, and internal air pores and
air bubbles can be found by X-ray fluoroscopy or mechanical
processing. The air bubbles are black on the X-ray film.
cause:
1. The pouring alloy is not stable and is involved in gas
2. Organic impurities (such as coal dust, grass-roots horse manure,
etc.) are mixed into the sand (core)
3. Poor ventilation of mold and sand core
4. There are shrinkage holes on the surface of the cold iron
5. Poor design of gating system
Prevention method:
1. Correctly control the pouring speed and avoid getting involved
in the gas.
2. The molding (core) sand shall not be mixed with organic
impurities to reduce the gas generation of the molding material
3. Improve the exhaust ability of (core) sand
4. Correct selection and handling of cold iron
5. Improve gating system design
Shrinkage
Defect characteristics: shrinkage porosity of aluminum castings
generally occurs at the thick part of the root of the fly riser
near the inner runner, the thickness transition of the wall, and
the thin wall with a large plane. In the as-cast state, the
fracture is gray, and the light yellow is gray-white, light-yellow
or gray-black after heat treatment. It is cloudy on the X-ray film.
Serious filamentous shrinkage can be found by X-ray, fluorescence
low-magnification fracture and other inspection methods.
cause:
1. Poor feeder effect
2. The gas content of the charge is too much
3. Overheating near the runner
4. There is too much moisture in the sand mold, and the sand core
is not dried
5. Coarse grains of alloy
6. Improper position of the casting in the mold
7. The pouring temperature is too high and the pouring speed is too
fast
Prevention method:
1. Refill the molten metal from the riser to improve the design of
the riser
2. The charge should be clean and free of corrosion
3. The riser is set at the shrinkage of the casting, and the cold
iron or the cold iron is used in combination with the riser.
4. Control sand moisture, and sand core drying
5. Take measures to refine the product
6. Improve the position of the casting in the mold to reduce the
pouring temperature and pouring speed
four cracks
Certificates and Honors
Factory display
Company Profile
Jiangyin Longkang Metal Products Co., Ltd. is located in Zhouzhuang
Town, Jiangyin City - the largest aluminum extrusion profile
production base. Covering an area of more than 35,000 square meters
with more than 350 employees. We focus on metal customization,
special-shaped aluminum profiles, aluminum profiles, aluminum
tubes, rail transit series, doors and windows aluminum profiles,
heat sinks, CNC processed aluminum profiles, interior decoration
series, bending series, etc. We also have precision anodizing and
various surface treatments, such as PVC film, wood grain,
electrophoresis, powder coating, anodizing, etc. After more than 20
years of development, The company has become a modern aluminum
production enterprise with perfect quality management system.
The company has the ability to develop and design molds
independently, we can produce any extruded aluminum profiles
according to your mechanical drawing or sample. Longkang has 10
extrusion production lines (600-3500 tons), one automatic oxidation
electrophoresis production line, vertical and horizontal spraying
production line per each, and a variety of advanced supporting
production, processing and testing equipments. There are also CNT
digital control drilling and milling machine(CNC), double head saw,
hydraulic saw and punching machine in our processing workshop. The
complete technological process can benefit to reduce the production
turnover times for semi-finished products, to avoid the damage
during transportation, improve the production efficiency, reduce
the cost of production,and to ensure the quality and delivery time.
Efficiently treating our customers as partners with sincerity,
specialization and satisfaction is our managerial principle.
Attributed to the backup of a dedicated technical team, filled with
wide and profound knowledge and practice in aluminum profile and
world trade for 20 years, the company owns rich experience in
product quality control and profile physical properties such as
Hardness, Stretchability, Flatness, Straightness, and Tolerance
etc. In line with the principle of sharing the preferential cost
and joint development, the company has formed an interest community
for years with its customers at home and abroad. Sincerely to build
up a pleasant mutual trust, cooperative, win-win and value-added
sustainable partnership is what we are achieving to grow together
with you!
FAQ
Q: How long can I receive the goods after placing the order?
A: 15-30 working days after receiving the deposit (depending on the
quantity).
Q: What is the thickness of the anodizing? Can you do 12um?
A: Our normal thickness is about 10 um. Yes, we can do 15 microns
and above.
Q: What colors can powder coatings be used for? The thickness of
the powder coat?
A: We can do any color for powder coating as long as you can
provide color samples. Our usual powder coating thickness is
60-80um.