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A kind of paraffin microvalve molding and packaging method thereof

A paraffin and microvalve technology, applied in chemical instruments and methods, laboratory equipment, laboratory containers, etc., can solve the problems of inability to produce paraffin phase change valves on a large scale and low efficiency, and improve production efficiency and appearance The effect of high quality, low manufacturing cost and simple production process

Active Publication Date: 2021-04-02
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the size of the microvalve is generally at the millimeter level or even the micron level, the traditional paraffin wax production process cannot meet this requirement. The current method is mainly to use high-precision syringes in the laboratory to form a single molding method, which is inefficient and cannot be used for large-scale production of paraffin wax phase change. valve

Method used

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  • A kind of paraffin microvalve molding and packaging method thereof
  • A kind of paraffin microvalve molding and packaging method thereof
  • A kind of paraffin microvalve molding and packaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Rapid paraffin microvalve molding with static encapsulation systems such as figure 1 , figure 2 and image 3 Shown, including paraffin microsphere molding device and static encapsulation device.

[0025] The paraffin microsphere forming device includes a mold 1, the mold 1 is a mold cavity 3 with a plurality of paraffin valve shapes through the inside, and has a cylindrical shell with a certain thickness, wherein the shape of the mold cavity 3 can be adjusted according to the shape of the required phase change valve. The specific shape is adjusted accordingly, and the thickness of the mold 1 can also be adjusted accordingly depending on the required depth of the paraffin microvalve. A heating sheet is installed on the lower bottom of the mold 1 as a heating module 2 in the embodiment.

[0026] During use, the solid paraffin particles are heated and melted into a liquid state in advance, and injected into the infusion tool. The infusion tool in this embodiment is a s...

Embodiment 2

[0029] A dynamic encapsulation system for paraffin microvalve, such as Figure 5 As shown in (1), it includes a solid paraffin storage cavity 8 and a cavity to be packaged 10, wherein the solid paraffin storage cavity 8 adopts the static paraffin encapsulation method in Embodiment 1 in advance to be packaged with a paraffin block consistent with the size of the cavity, and the solid paraffin storage A heating zone 12 is provided at the lower part of the cavity 8, and an air hole (sampling hole) 9 is provided on the cavity 10 to be packaged.

[0030] Before the encapsulation chamber 10 is not encapsulated with paraffin, it can be flexibly used as a common chamber such as a sample injection chamber and a liquid reaction chamber. Once it needs to have the function of a microvalve, the solid paraffin storage chamber 8 can be heated through the heating zone 12. Until the paraffin in the storage chamber 8 melts into a liquid state, the molten paraffin in the solid paraffin storage c...

Embodiment 3

[0033] A dynamic encapsulation system for paraffin microvalve, such as Figure 5 As shown in (2), it includes an air cavity 7, a solid paraffin storage cavity 8 and a cavity to be encapsulated 10, wherein the solid paraffin storage cavity 8 adopts the static paraffin encapsulation method in Embodiment 1 to encapsulate a paraffin block consistent with the size of the cavity , the lower part of the air cavity 7 and the solid paraffin wax storage cavity 8 are heating zones 11 and 12 respectively, and an air hole (sampling hole) 9 is provided in the cavity 10 to be packaged.

[0034] Before the sealing cavity 10 is not encapsulated with paraffin, it can be flexibly used as a common cavity such as a sample injection cavity and a liquid reaction cavity. Once it needs to have the function of a microvalve, it can pass the heating zone 11 to the gas cavity 7, and the heating zone 12 to the gas cavity. The solid paraffin storage chamber 8 is heated separately until the paraffin in the s...

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Abstract

The invention provides a paraffin micro valve shaping and fast encapsulation method, which comprises a paraffin micro valve shaping device and a paraffin micro valve encapsulation method. On the basisof static encapsulation, a method of additionally adding an air cavity onto a paraffin encapsulated cavity (namely a paraffin storage cavity) is used; the air cavity and the solid paraffin storage cavity are heated, so that air in the air cavity expands through being heated; the generated force pushes the paraffin in a molten state at the moment to enter a cavity to be encapsulated; after the paraffin in the cavity is completely cooled, the encapsulation on the paraffin in the cavity is completed. The method has the advantages that through heating on the chip completing the encapsulation, theflowing transferring of the paraffin from one cavity to the other cavity is realized; the secondary dynamic encapsulation of the paraffin is completed.

Description

technical field [0001] The invention relates to a fast packaging method for a paraffin valve, in particular to a paraffin microvalve molding device and a fast packaging method for a paraffin microvalve based on electric heating. Background technique [0002] In the microfluidic chip system, the microvalve, as a component that can control the closing and opening of the microchannel, can control the flow of the liquid, affects the integration of the chip, and plays an extremely important role. C.D. Bevan first proposed the phase change valve in 1995. When the valve needs to be closed, the microfluid can be actively refrigerated, so that part of the microfluid can freeze rapidly in a very short time to block the microchannel. When the valve needs to be opened, the Heating the frozen microfluidics causes the valves to open. Paraffin valve is a kind of phase change valve. In the development process of phase change valve, paraffin wax has been widely used because of its low melti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/00
CPCB01L3/502707B01L3/502738
Inventor 王光辉杨佳辰王夷惠谭杰刘伉伉李忠文张畅斌
Owner NANJING UNIV