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Method for demoulding and hydrating contact lens

A contact lens and demoulding technology, which is applied in glasses/goggles, optics, instruments, etc., can solve problems such as flammability, safety hazards, and volatiles, and achieve fast demoulding speed, convenient maintenance, and complete demoulding effects

Active Publication Date: 2011-05-04
HAICHANG CONTACT LENSES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these demoulding and hydration methods can produce qualified contact lenses, they all have a big disadvantage, that is, they are flammable and volatile. Isopropanol will burn at 70°C, which is very dangerous and has a strong pungent smell. , affecting people's health, there is a great potential safety hazard
Be very careful when operating, and this demoulding method requires a very special device, which must be sealed and protected from high temperatures, and the cost is relatively high

Method used

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  • Method for demoulding and hydrating contact lens
  • Method for demoulding and hydrating contact lens
  • Method for demoulding and hydrating contact lens

Examples

Experimental program
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Embodiment Construction

[0020] The method of releasing and hydrating contact lenses includes the following steps in sequence:

[0021] 1. Soak the mold embryo in ice water: Take out the trimmed contact lens mold embryo 1 from the special plastic tube, and put the mold embryo 1 face up into the demoulding tray one by one by wearing latex gloves, see attached figure 1 Please note that there should be no overlap when placed, and no fingers or other objects should be used to touch the front of the mold base 1 (ie concave surface). After a tray is full, cover a demolding tray and fix it with cowhide ribs to prevent the mold base from rolling, inverting and loosening the demolding tray. And note that the batch number must correspond to the marking on the stripping disc and make a record. The demolding disc is designed with mesh holes and fixed handle 2, made of high-temperature resistant PE material. This is beneficial for the mold base 1 to be completely immersed in the demolding and hydration liquid, and th...

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Abstract

The invention relates to a method for demoulding and hydrating a contact lens, which comprises the following steps in turn: mould base ice water immersion, mould base demoulding, hydration extraction,immersion, balancing, inspection and packaging. The method has the advantages of simple operation, convenient maintenance, high speed of lens demoulding, high demoulding efficiency, and complete demoulding without the happening of lens mould sticking, and the produced lenses are clean and complete without impurities.

Description

Technical field [0001] The invention relates to a demolding method for producing contact lenses by using a centrifugal molding process and a matching device for extracting and hydrating lens toxins. Background technique [0002] The current production processes of soft contact lenses include rotational forming, cutting forming, compression forming and hybrid forming. All the lenses produced by these production processes need to go through a hydration process, and there are many hydration methods. The hydration process is an important process in the production of contact lenses. The hydration of the lens directly affects the quality and production efficiency of the lens. Lens hydration is to drop the hydrophilic liquid raw materials purified multiple times during the production of contact lenses by centrifugal casting into a disposable plastic mold that rotates at high speed and fill it with high-purity nitrogen. The amount of drop and the rotation direction and speed of the mold...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/04
Inventor 蔡瑞钦
Owner HAICHANG CONTACT LENSES