Shenzhen Johnhalm PDTec.,Ltd
Shenzhen Johnhalm PDTec.,Ltd ShenZhen JiaHeng Mould Manufacture Co.,Ltd
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Aluminum Die Casting OEM Manufacturer Customed Aluminium alloy door handle
| Description: | Door handle |
| Product name: | Customed Aluminium alloy door handle |
| Material: | ADC12, A380 |
| Logo: | Printed or laser with customized logo |
| Finish: | Painting, Powder spraying ,Plating |
| Packaging: | Simple EPE bag 8pcs/ctn |
| Colours: | Silver, Black ,Grey |
| Process: | Die casting, Machining,Finish,Inspection, Package |
Aluminum die casting alloys are lightweight and possess high dimensional stability for complex part geometries and thin walls. Aluminum has good corrosion resistance and mechanical properties as well as high thermal and electrical conductivity, making it a good alloy for die casting.
Our Alloys Include:
· Aluminum: 360, 380, 383, 413, and ADC12 ,B390
· Zinc-Aluminum: ZA-3# ,ZA-5#
Two dies are used in die casting; one is called the "cover die half" and the other the "ejector die half". Where they meet is called the parting line. The cover die contains the sprue (for hot-chamber machines) or shot hole (for cold-chamber machines), which allows the molten metal to flow into the dies; this feature matches up with the injector nozzle on the hot-chamber machines or the shot chamber in the cold-chamber machines. The ejector die contains the ejector pins and usually the runner, which is the path from the sprue or shot hole to the mould cavity. The cover die is secured to the stationary, or front, platen of the casting machine, while the ejector die is attached to the movable platen. The mould cavity is cut into two cavity inserts, which are separate pieces that can be replaced relatively easily and bolt into the die halves.
The dies are designed so that the finished casting will slide off the cover half of the die and stay in the ejector half as the dies are opened. This assures that the casting will be ejected every cycle because the ejector half contains the ejector pins to push the casting out of that die half. The ejector pins are driven by an ejector pin plate, which accurately drives all of the pins at the same time and with the same force, so that the casting is not damaged. The ejector pin plate also retracts the pins after ejecting the casting to prepare for the next shot. There must be enough ejector pins to keep the overall force on each pin low, because the casting is still hot and can be damaged by excessive force. The pins still leave a mark, so they must be located in places where these marks will not hamper the casting's purpose.
Die and component material and hardness for various cast metals
| Die component | Cast metal | |||||
| Tin, lead & zinc | Aluminium & magnesium | Copper & brass | ||||
| Material | Hardness | Material | Hardness | Material | Hardness | |
| Cavity inserts | P20[note 1] | 290–330 HB | H13 | 42–48 HRC | DIN 1.2367 | 38–44 HRC |
| H11 | 46–50 HRC | H11 | 42–48 HRC | H20, H21, H22 | 44–48 HRC | |
| H13 | 46–50 HRC | |||||
| Cores | H13 | 46–52 HRC | H13 | 44–48 HRC | DIN 1.2367 | 40–46 HRC |
| DIN 1.2367 | 42–48 HRC | |||||
| Core pins | H13 | 48–52 HRC | DIN 1.2367 prehard | 37–40 HRC | DIN 1.2367 prehard | 37–40 HRC |
| Sprue parts | H13 | 48–52 HRC | H13 DIN 1.2367 |
46–48 HRC 44–46 HRC |
DIN 1.2367 | 42–46 HRC |
| Nozzle | 420 | 40–44 HRC | H13 | 42–48 HRC | DIN 1.2367 H13 |
40–44 HRC 42–48 HRC |
| Ejector pins | H13[note 2] | 46–50 HRC | H13[note 2] | 46–50 HRC | H13[note 2] | 46–50 HRC |
| Plunger shot sleeve | H13[note 2] | 46–50 HRC | H13[note 2] DIN 1.2367[note 2] |
42–48 HRC 42–48 HRC |
DIN 1.2367[note 2] H13[note 2] |
42–46 HRC 42–46 HRC |
| Holder block | 4140 prehard | ~300 HB | 4140 prehard | ~300 HB | 4140 prehard | ~300 HB |
|
Typical die temperatures and life for various cast materials
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| Zinc | Aluminium | Magnesium |
Brass (leaded yellow) |
|
| Maximum die life [number of cycles] | 1,000,000 | 100,000 | 100,000 | 10,000 |
| Die temperature [C° (F°)] | 218 (425) | 288 (550) | 260 (500) | 500 (950) |
| Casting temperature [C° (F°)] | 400 (760) | 660 (1220) | 760 (1400) | 1090 (2000) |
There are a number of geometric features to be considered when creating a parametric model of a die casting:
· Draft is the amount of slope or taper given to cores or other parts of the die cavity to allow for easy ejection of the casting from the die. All die cast surfaces that are parallel to the opening direction of the die require draft for the proper ejection of the casting from the die.Die castings that feature proper draft are easier to remove from the die and result in high-quality surfaces and more precise finished product.
· Fillet is the curved juncture of two surfaces that would have otherwise met at a sharp corner or edge. Simply, fillets can be added to a die casting to remove undesirable edges and corners.
· Parting line represents the point at which two different sides of a mould come together. The location of the parting line defines which side of the die is the cover and which is the ejector.
· Bosses are added to die castings to serve as stand-offs and mounting points for parts that will need to be mounted. For maximum integrity and strength of the die casting, bosses must have universal wall thickness.
· Ribs are added to a die casting to provide added support for designs that require maximum strength without increased wall thickness.
· Holes and windows require special consideration when die casting because the perimeters of these features will grip to the die steel during solidification. To counteract this effect, generous draft should be added to hole and window features .