A method for forming a straight-through check valve of a miniature heat-shrinkable tube

Abstract

The invention discloses a micro heat shrink tubing straight-through one-way valve and a forming method thereof, and relates to a one-way valve and a forming method thereof. The technical problems thatexisting one-way valves are complex in structure, rapid forming is difficult to achieve, and mounting gaps and fluid dead volumes exist are solved. The micro heat shrink tubing straight-through one-way valve is composed of a valve body, a spherical valve core and a stainless steel spring. The forming method comprises the following steps that firstly, one end of a heat shrink tubing is heated to the shrinkage temperature, and the shrunken end is used as an inlet of the one-way valve; secondly, the spherical valve core and the stainless steel spring are sequentially put into the heat shrink tubing from the non-shrunken end of the heat shrink tubing; and thirdly, the non-shrunken end of the heat shrink tubing is heated to the shrinkage temperature, and the second shrunken end is used as an outlet of the one-way valve. The heat shrink tubing is used as a valve body material, not only the valve body material of the one-way valve is changed, but the overall structure of the one-way valve issimplified and minimized, the flow channel dead volume in the valve body is reduced, and the one-way valve is more suitable for processing of microfluid samples and operation demands of microfluidicssystems.

Description

technical field [0001] The invention relates to a molding method of a straight-through check valve. Background technique [0002] A check valve is a fluid control valve that allows the fluid to flow only from the inlet to the outlet, and the outlet medium cannot flow back. It is also called a check valve or a check valve. It is the most commonly used control valve in the fluid control system to prevent the reverse flow of compressed air in the system. There are two main types of check valves: straight-through type and right-angle type. At present, basically all check valves are composed of a valve core, a valve body and a spring. The material of the valve body is usually made of metal or engineering plastics, and the valve core is usually made of metal, engineering plastics or rubber. The straight-through check valve is installed on the pipeline with a threaded connection or a flange connection. Right-angle check valves are available in threaded connection, plate connecti...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of the existing one-way valve, which are complex in structure, difficult to realize rapid prototyping, inconvenient to install and connect, have installation gaps and fluid dead volumes, and cannot be integrated with microfluidic control systems, and provide a miniature Forming method of heat-shrinkable tube straight-through check valve

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