One aluminum alloy low -voltage casting coating structure and processing method
A technology of coating treatment and aluminum alloy, applied in the direction of coating, casting mold, casting mold composition, etc., can solve the problems of increasing on-site pouring operation procedures, unrealizable mold size, difficulty in customizing riser sleeves, etc., and achieves good heat preservation effect , Excellent thermal insulation effect, good adhesion performance
Active Publication Date: 2017-01-18
SHAANXI FAST AUTO DRIVE GROUP CO LTD
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- Abstract
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AI Technical Summary
Problems solved by technology
Although placing a formed riser sleeve at the riser can solve the problems caused by the above two methods, but because there are risers of different shapes on a single casting, it is difficult to customize the riser sleeve, and the riser sleeve needs to be placed again for each mold. , which increases the on-site pouring operation process and increases the production cost
The back of the riser is filled with insulation material, which requires a larger riser, which is sometimes impossible to achieve due to the influence of the mold size
Method used
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[0024] The present invention will be further described in detail below in conjunction with the drawings:
[0025] Reference figure 1 with figure 2 , The present invention includes a riser 2 formed by a mold 4 and a cavity on it. The riser 2 is open on one side and communicates with the mold cavity forming the casting body 1. A sintered riser is provided between the mold 4 and the riser 2. Coating 3, the riser coating 3 includes a layer of No. 1 refractory material 31 and a layer of No. 2 refractory material 32 which are bonded to each other. The No. 1 refractory material 31 is bonded to the mold 4 and extends from the bottom of the riser 2 to the opening The thickness gradually decreases, forming a slope of 30-60°, and the coating thickness at the bottom is 5-10mm; at the same time, the transition layer 33 formed between the two refractory materials can increase the combination between the two refractory materials and effectively prevent coating The layer falls off.
[0026] The...
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Abstract
The invention relates to a feeder head coating structure and treatment method of an aluminum alloy low-pressure cast. The feeder head coating structure comprises a mold and a feeder head formed by a cavity in the mold. The feeder head is communicated with a mold cavity forming a cast body, and a sintered feeder head coating is arranged between the mold and the feeder head. The thicknesses, from the bottom of the feeder head to an opening, of the feeder head coating are gradually decreased to form a gradient. The feeder head coating with the gradient is adopted for making the coating at the bottom of the feeder head be thick, the thicknesses from the bottom of the feeder head to the opening are gradually decreased, in this way, the thermal insulation effect is excellent, molten metal at the bottom of the feeder head is prevented from solidifying firstly in the process of feeding, it can be effectively guaranteed that sufficient feeding is performed on the cast through the feeder head, the feeder head coating has certain surface strength and smoothness after sintering, the adhesion property of the coating on the mold is good, the combination between coatings is good, the possibility that in the casting process, the high-temperature molten aluminum erodes the coating is lowered, and the feeder head coating is effectively prevented from falling off in the process of cast stripping.
Description
Technical field [0001] The invention relates to the field of low-pressure casting of metal molds, in particular to a riser coating structure and processing method of aluminum alloy low-pressure castings. Background technique [0002] Low-pressure casting is a mature casting process at home and abroad. Low-pressure metal casting uses external force to make the molten metal flow against the direction of gravity to fill the metal cavity and solidify. The surface of the casting prepared by the method has the advantages of good smoothness, high density, good mechanical properties and the like. [0003] In low pressure casting, riser feeding is often used at the casting parts that cannot be fed by the gating system. At present, the coating treatment in the riser often uses a layer of insulation coating on the riser and a refractory coating on the riser. Material, put a formed riser sleeve on the riser or fill the back of the riser with insulation material. [0004] Paint a layer of refra...
Claims
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IPC IPC(8): B22D18/04B22C3/00
Inventor 白智渊何元元
Owner SHAANXI FAST AUTO DRIVE GROUP CO LTD