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A wax collector with built-in porous metal foam with gradient structure

A porous metal foam, gradient structure technology, applied in the field of powder metallurgy, can solve the problems of product carbonization, organic forming agent blockage, quality fluctuation of sintered products, etc., and achieve the effect of convenient recovery and efficient collection

Active Publication Date: 2016-10-05
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unreasonable structure of the wax collection system in common dewaxing-sintering integrated furnaces, the wax collection rate is not good, and it is easy to cause the valves and vacuum pumps after the wax collection device of the sintering furnace to be frequently blocked by organic forming agents, which hinders safe and normal production. bring hidden danger
After high-temperature thermal decomposition of the residual organic forming agent in the furnace, it will also cause carburization of the product, resulting in fluctuations in the quality of the sintered product

Method used

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  • A wax collector with built-in porous metal foam with gradient structure
  • A wax collector with built-in porous metal foam with gradient structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a vertical metal cylinder 6 with a water jacket on the outer shell, the metal cylinder has a built-in porous foam metal copper 2 with a gradient structure; the lower side wall of the metal cylinder is provided with an air inlet 3; the upper side wall of the metal cylinder is provided with There is an air outlet 1, and the bottom side wall of the metal cylinder is provided with a wax discharge port 4; the lower side wall of the water jacket is provided with a water inlet 5, and the upper side wall of the water jacket is provided with a water outlet 7. The through-porosity of porous copper foam is ≥98%; according to the direction of the entry and discharge of waxy gas, the porosity of porous copper foam is 60%~90%, and the pore diameter is in the range of 0.5~5mm from large to small, in a gradient arrangement . The water jacket of the metal cylinder 6 passes cooling circulating water during dewaxing and sintering; heat circulating water passes ...

Embodiment 2

[0024] Such as figure 2 As shown in the figure, a horizontal metal cylinder 6 with a water jacket on its outer shell has a built-in gradient structure of porous nickel foam and porous copper foam 2; the left side of the metal cylinder is provided with an air inlet 3; the right side of the metal cylinder is The side is an air outlet 1; the bottom side wall of the metal cylinder is provided with a wax discharge port 4; the lower wall on the right side of the water jacket is provided with a water inlet 5, and the upper wall on the left side of the water jacket is provided with a water outlet 7. The through-porosity of porous nickel foam and porous copper foam with gradient structure is ≥98%; the porosity of porous nickel foam is 70%~98%, and the pore diameter is 2~10mm; the porosity of porous copper foam is 50%~70%, The pore diameter is 0.1~2mm, and the two are arranged in front and back along the direction of the entry-exit of the polyethylene glycol-containing gas, and the por...

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Abstract

The invention discloses a wax collection device with built-in porous foam metal of a gradient structure, and belongs to the technical field of powder metallurgy. The wax collection device with the built-in porous foam metal of the gradient structure comprises a vertical or horizontal metal cylinder, wherein an outer shell of the metal cylinder is wrapped with a water jacket; the porous foam metal of the gradient structure is arranged inside the metal cylinder; the side walls of the metal cylinder are provided with an air inlet and an air outlet; a wax drainage port is formed in the side wall of the bottom of the cylinder; a water inlet is formed in the side wall of the lower portion of the water jacket; a water outlet is formed in the side wall of the upper portion of the water jacket. By the utilization of the characteristics of good heat conduction performance and good gas retardation performance of the porous foam metal of the gradient structure, the wax collection device can enable heat energy of furnace gas guided into the wax collection device to be rapidly diffused into the water jacket with cooling circulating water, and gas wax and other organic forming agents condense to be liquid wax; as the porous foam metal of which the hole diameter is arranged in a gradient mode is high in through-hole rate and porosity and good in gas and liquid permeability, the wax can be gathered to be the organic forming agents effectively, and the collection rate of the organic forming agents of the wax collection device is greater than or equal to 98%.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a wax collector with a built-in gradient structure porous metal foam. Background technique [0002] Forming is the basic process in the preparation process of powder metallurgy products. The forming agent required in the forming process is a kind of organic matter, which must be completely removed before or during sintering of the powder compact, otherwise it will have a significant impact on product quality. Since paraffin and polyethylene glycol are the most common forming agents, the equipment for removing organic forming agents is generally called dewaxing equipment. Due to the unreasonable structure of the wax collection system in common dewaxing-sintering integrated furnaces, the wax collection rate is not good, and it is easy to cause the valves and vacuum pumps after the wax collection device of the sintering furnace to be frequently blocked by organ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22
Inventor 林中坤林晨光曹瑞军
Owner GRIMAT ENG INST CO LTD
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