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A sand casting method for the front frame of 18kw film and television lamps

A technology of sand casting and lamps, which is applied in the direction of casting molding equipment, cores, casting molds, etc. It can solve the problems of cold insulation and insufficient pouring, large shrinkage of magnesium alloys, and entry of oxidized slag into castings, etc., to solve the problem of large shrinkage and solution loose casting effect

Active Publication Date: 2019-01-18
山东银光钰源轻金属精密成型有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium alloy melt cools down quickly during the flow process, thereby reducing the fluidity of the magnesium alloy, and prone to cold shut and insufficient pouring; the shrinkage of the magnesium alloy is relatively large, and the casting cannot be fed in time during the solidification and shrinkage of the magnesium alloy. , the casting will crack and loose; the magnesium alloy melt is prone to oxidation and combustion, and the oxide slag will enter the casting and form defects.

Method used

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  • A sand casting method for the front frame of 18kw film and television lamps
  • A sand casting method for the front frame of 18kw film and television lamps

Examples

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Effect test

Embodiment 1

[0020] A sand casting method for the front frame of a 18KW film and television lamp according to the present invention, the process steps are as follows:

[0021] 1) Mixed resin sand: The resin sand is made by mixing the following components according to mass percentage, 80 mesh quartz sand: phenol urethane resin NP301: phenol urethane resin NP302=100:0.5: 1.2, mixing When making, first add quartz sand and phenol urethane resin NP301, mix and stir for 2 minutes, then add phenol urethane resin NP302 and mix for 3 minutes to obtain usable resin sand;

[0022] 2), molding core making: refer to figure 1 and figure 2 , adopts four-box shape and three-layer stepped runner system, the three-layer runner connects the sprue and the inner runner, and the three-layer runner is separated by sand, which can reduce the magnesium liquid entering from different sprues Mutual impact causes the pressure of the magnesium liquid to decrease, and the molded chill iron is added at the hot juncti...

Embodiment 2

[0032] According to Embodiment 1, a sand casting method for the front frame of a 18KW film and television lamp according to the present invention, the process steps are as follows:

[0033] 1) Mixed resin sand: The resin sand is made by mixing the following components according to mass percentage, 140 mesh quartz sand: phenol urethane resin NP301: phenol urethane resin NP302=100: 1.2:0.5, mixing First add quartz sand and phenolurethane resin NP301, mix and stir for 3 minutes, then add phenolurethane resin NP302 and mix for 2 minutes to obtain usable resin sand;

[0034] 2) Molding core making: four-box molding and three-layer stepped runner system are adopted. The runners are connected to the straight runner and the inner runner. Iron; during the core making process, a core bone is added to a core with a circular wall thickness;

[0035] 3) Sand spraying: After the molding is completed, spray a layer of paint on the inner wall of the cavity and the surface of the core. The pa...

Embodiment 3

[0040] According to Embodiment 1, a sand casting method for the front frame of a 18KW film and television lamp according to the present invention, the process steps are as follows:

[0041] 1) Mixed resin sand: The resin sand is made by mixing the following components according to mass percentage, 100 mesh quartz sand: phenol urethane resin NP301: phenol urethane resin NP302=100: 1.0: 1.0, mixing First add quartz sand and phenol urethane resin NP301, mix and stir for 2.5 minutes, then add phenol urethane resin NP302 and mix and stir for 2.5 minutes to obtain usable resin sand;

[0042] 2) Molding core making: four-box molding and three-layer stepped runner system are adopted. The runners are connected to the straight runner and the inner runner. Iron; during the core making process, a core bone is added to a core with a circular wall thickness;

[0043] 3) Sand spraying: After the molding is completed, a layer of paint is sprayed on the inner wall of the cavity and the surfac...

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Abstract

The invention discloses a sand casting method of a front frame of an 18KW film and television lamp. The sand casting method comprises the steps of mixing resin sand, moulding and making a core, spraying a sand mould, baking the sand mould, smelting magnesium alloy raw materials, insulating and pouring. According to the sand casting method, a stepped casting system is adopted, magnesium alloy passes through a sprue to enter a cross gate which adopts a three-layer stepped form, after the cross gate is filled, the magnesium alloy enters a mold cavity from an ingate, magnesium alloy liquid containing impurities enters the far end of the cross gate, pure magnesium liquid passes through the ingate in the middle of the cross gate, and a whole casting is filled with the magnesium liquid in the mold cavity of the casting from bottom to top, so that progressive solidification is realized, the problem that the casting is loose is solved, the casting can be fed by each cross gate, and the technical problem of large shrinkage of the magnesium alloy is solved.

Description

technical field [0001] The invention belongs to the technical field of sand casting of a front frame of a magnesium alloy film and television lamp, and relates to a sand casting method for a front frame of a film and television lamp. Background technique [0002] Magnesium alloy has low density (1.8g / cm 3 left and right) but high strength and good rigidity. Among the existing engineering metals, the density of magnesium is the smallest, which is 1 / 5 of steel, 1 / 4 of zinc, and 2 / 3 of aluminum. Ordinary cast magnesium alloys have the same rigidity as cast aluminum alloys, so their specific strength is significantly higher than that of aluminum alloys, and magnesium alloys are more used to design integral components. Good heat dissipation performance, at the same temperature, the heat dissipation time of magnesium alloy is less than half of that of aluminum alloy. Therefore, the front frame of the film and television lamp is made of magnesium alloy material, which directly r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22B22C9/02B22C9/08B22C1/22
CPCB22C1/2233B22C9/02B22C9/082B22C9/22
Inventor 李廷斌司文强吴国清李霞王飞
Owner 山东银光钰源轻金属精密成型有限公司
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