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Method for producing metallic-sodium-filled engine valve

A technology for engine valves and manufacturing methods, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., and can solve the problems of difficult extrusion and poor workability of metal sodium

Inactive Publication Date: 2012-10-31
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) Solid metal sodium is difficult to extrude, so the workability related to forming processing is poor
[0011] (2) When liquid metal sodium is injected into the above-mentioned hollow part, if the metal sodium adheres to the inner wall of the elongated hollow part (about 2 to 4 mm in diameter), it will immediately cool and solidify to block the hollow part. Injecting liquid metal sodium while heating the valve stem (98°C or higher), resulting in poor workability related to injection

Method used

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  • Method for producing metallic-sodium-filled engine valve
  • Method for producing metallic-sodium-filled engine valve
  • Method for producing metallic-sodium-filled engine valve

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no. 1 approach

[0025] according to figure 1 , 2 A first embodiment of the method of manufacturing a sodium metal-encapsulated engine valve according to the present invention will be described.

[0026] exist figure 1 Among them, 111 is a cylinder, and the nozzle 112 is provided in the front-end side. 113 is a piston, and the inside of the said cylinder 111 is arrange|positioned so that sliding movement is possible. 114 is a piston rod connected to the piston 113 to move the piston 113 . 115 is a heater disposed so as to cover the outer periphery of the cylinder 111 and to be able to heat and keep the inside of the cylinder 111 warm (for example, about 120 to 300° C.). 121 is a container in which hydrocarbon fluid 120 such as oil is filled.

[0027] Then, in a dry inert gas atmosphere such as dry nitrogen, the cylinder 111 is arranged above the container 121 so that the nozzle 112 is directed downward, and metal sodium Na cut into a predetermined size is placed in the into the cylinder 1...

no. 2 approach

[0034] according to image 3 , 4 A second embodiment of the method of manufacturing a sodium metal-encapsulated engine valve according to the present invention will be described. Here, the same reference numerals as those used in the description of the first embodiment are used for the same parts as those of the first embodiment, and descriptions that overlap with those of the first embodiment are omitted.

[0035] exist image 3 Among them, 220 is a die, and when the upper surface of the lower die 221 and the lower face of the upper die 222 are overlapped, a bar-shaped space 220a is formed in which both ends are tapered. A communication port 222a that communicates with the space 220a and above is formed on the upper surface of the upper die 222 .

[0036] Then, in a dry inert gas atmosphere such as dry nitrogen, the nozzle 112 is inserted into the communication port 222a of the upper mold 221 of the mold 220, and metal sodium Na cut into a predetermined size is put into th...

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Abstract

In the disclosed method, an engine valve (V) filled with metallic sodium (Na) within is produced by means of hardening metallic sodium (Na)-that has been liquefied through heat-melting-into rods by linearly discharging the metallic sodium (Na) in a liquid hydrocarbon (120), thus cooling the metallic sodium, then inserting these rods into a hollow section (H) through the opening (M) of a stem section (S), and then sealing the opening (M).

Description

technical field [0001] The present invention relates to a method of manufacturing an engine valve in which metallic sodium is sealed. Background technique [0002] In the engine valves of automobiles and the like, metal sodium is enclosed inside the engine valves to achieve weight reduction and high heat transfer in order to cope with higher engine performance and lower fuel consumption. [0003] Such an engine valve is produced by, for example, (1) extruding solid metal sodium into a rod shape and cutting it into a predetermined The length is inserted into the above-mentioned hollow part from the above-mentioned opening, or (2) the solid metal sodium is heated and melted (about 120-300 ° C) to form a liquid, and a predetermined amount is injected into the above-mentioned hollow part from the above-mentioned opening, so that the metal After putting sodium into the above-mentioned hollow part, the above-mentioned opening is sealed to manufacture (for example, refer to the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/14
CPCB23P15/002F01L3/14Y10T29/49426
Inventor 森井宏和丸山和孝吉村豹治
Owner MITSUBISHI HEAVY IND LTD