Workpiece surface vacuum defoaming method

A technology of workpiece surface, vacuum defoaming, applied in the direction of foam dispersion/prevention, etc., can solve the problems of difficult discharge of air bubbles, large surface tension, thick potting thickness, etc., to improve product surface quality, improve product quality, and ensure sealing effect of effect

Active Publication Date: 2015-10-28
ANHUI RIZEN AUTO PARTS
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AI Technical Summary

Problems solved by technology

The use of traditional vacuum defoaming process has limitations. For workpieces filled with epoxy resin, the viscosity of the resin is relatively high, the surface tension is high, the thickness of the potting is thick,

Method used

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  • Workpiece surface vacuum defoaming method

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Example Embodiment

[0022] With reference to the accompanying drawings, the specific implementation of the present invention will be further described in detail through the description of the best embodiment.

[0023] Reference figure 1 , The vacuum deaeration method on the surface of the workpiece, the specific steps are:

[0024] (1) Place the workpiece 3 in the vacuum chamber 2, and connect the vacuum chamber 2 with the vacuum pump 4 and the high-pressure air injection nozzle 1;

[0025] (2) Turn on the vacuum pump 4 to vacuum, and when the vacuum in the vacuum chamber 2 reaches the closed set value, turn off the vacuum pump 4;

[0026] (3) Open the high-pressure air injection nozzle 1, the high-pressure air quickly enters the vacuum chamber 2, and the surface bubbles of the workpiece 3 are broken due to the rapid change of the internal and external pressure difference, and the rapid injection of high-pressure gas pressure acts on the surface of the bubbles to blow the bubbles;

[0027] When the vacuum...

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Abstract

The invention discloses a workpiece surface vacuum defoaming method which comprises the specific steps: (1) putting a workpiece in a vacuum chamber, and connecting the vacuum chamber with a vacuum pump and a high-pressure air injection spray head; (2) opening the vacuum pump to vacuumize, and closing the vacuum pump when the vacuum degree in the vacuum chamber reaches the closing set value; (3) opening the high-pressure air inject spray head to enable high-pressure air to enter the vacuum chamber quickly, breaking bubbles on the surface of the workpiece due to quick change of internal and external pressure difference, meanwhile, enabling the pressure of quickly injected high-pressure air to act on the surfaces of the bubbles to blow the bubbles broken, and closing the high-pressure air injecting spray head when the vacuum degree in the vacuum chamber reaches the opening set value; (4) repeating the step (2) and the step (3) till the bubbles on a colloid on the surface of the workpiece are removed to achieve the vacuum defoaming of the workpiece. The method has the advantages that the product surface quality is improved, and the workpiece sealing effect is ensured.

Description

technical field [0001] The invention relates to a technology for defoaming the surface of a workpiece by colloidal vacuum potting, in particular to a vacuum defoaming method for the surface of the workpiece. Background technique [0002] For electronic devices that need to ensure internal vacuum, the surface of the electronic device is processed by colloidal vacuum potting. Since air bubbles are easy to remain on the surface of the workpiece, it is necessary to remove the air bubbles on the surface of the workpiece. The use of traditional vacuum defoaming process has limitations. For workpieces filled with epoxy resin, the viscosity of the resin is relatively high, the surface tension is high, the thickness of the potting is thick, and the air bubbles are not easy to discharge. It is not easy to break, and gathers on the surface of the colloid, that is, gathers on the surface of the workpiece, affecting the surface quality and sealing effect of the workpiece. Contents of t...

Claims

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Application Information

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IPC IPC(8): B01D19/02
Inventor 张琦
Owner ANHUI RIZEN AUTO PARTS
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