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All-plastic miniature one-way valve and machining method thereof

A processing method and one-way valve technology, which can be applied to control valves, valve devices, functional valve types, etc., can solve the problems of low processing rate, unsuitable for mass production, complex process, etc., and achieve high production efficiency and are conducive to etching. The effect of simple processing and craftsmanship

Inactive Publication Date: 2017-12-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2016, Huang Yuan and others from Shanghai University of Applied Technology prepared a micro-valve for precision infusion through ultraviolet exposure, wet etching, and laser processing (see pages 1072-1077 of Optical Precision Engineering, Issue 5, 2016), However, the process is complicated and the processing rate is low, so it is not suitable for mass production

Method used

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  • All-plastic miniature one-way valve and machining method thereof
  • All-plastic miniature one-way valve and machining method thereof

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, so as to help understand the content of the present invention.

[0037] Such as figure 1 and 2 Shown are the structural schematic diagram and the cross-sectional structural schematic diagram of an all-plastic miniature one-way valve provided by the present invention, respectively. Comprising a PMMA substrate 1 and a PDMS valve membrane 2, the PMMA substrate 1 is provided with a conical through hole 8, the PDMS valve membrane 2 covers the substrate side of the conical through hole narrow end 6, the PDMS valve membrane 2 is provided with four fan-shaped through-holes 5 arranged in a ring around a circular diaphragm 3 in the middle. The area of ​​the circular diaphragm 3 is larger than the narrow end 6 of the conical through-hole, and completely covers the narrow end 6 of the conical through-hole. The fluid flow path of the miniature one-way valve is ...

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Abstract

The invention discloses an all-plastic miniature one-way valve. The all-plastic miniature one-way valve comprises a base plate and a valve membrane, the base plate is provided with a conical through hole, the valve membrane covers the side of the narrow opening end of the conical through hole and is provided with multiple through holes which are formed around a round diaphragm in an annular shape, the area of the round diaphragm is larger than that of the narrow opening end of the conical through hole, the narrow opening end of the conical through hole is totally covered, and a fluid flow path of a miniature one-way valve is constituted among the conical through hole of the base plate and the through holes around the round diaphragm on the valve membrane. The invention further discloses a machining method of the all-plastic miniature one-way valve. An all-plastic miniature one-way valve fine machining method is adopted to machine the base plate, valve opening thin film is graphically machined to form a valve opening channel, a complex chemical etching and mechanical machining method is avoided, the etching precision is high, the technology is simple, the operation is convenient, the production efficiency is high, the production cost is low, and the all-plastic miniature one-way valve and machining method thereof are suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of one-way valves, in particular to an all-plastic miniature one-way valve manufactured by an excimer laser and a processing method thereof. Background technique [0002] In recent years, microreactors, microfluidic analysis chips, etc. have been actively promoting the research of medical microfluidic systems. Among them, the microfluidic analysis chip is a miniature total analysis system (μ-TAS) that integrates analysis functions such as sampling, dilution, reagent addition, reaction, separation, and detection to the greatest extent. , life sciences, chemical synthesis, analytical instruments and environmental sciences and many other important frontiers of development. The key part of the micro-valve micro-fluidic analysis chip is the core of fluid flow control in the micro-fluidic analysis chip. [0003] At present, the flow direction control of miniature check valves is mostly "open and close" structure...

Claims

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Application Information

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IPC IPC(8): F16K15/00B05D7/04
CPCF16K15/00B05D7/04
Inventor 李以贵蔡金东吕曈黄毅王欢吴文渊
Owner SHANGHAI INST OF TECH
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