KR20030090359A - Manufacture apparatus of contact lens with automatic process - Google Patents

Abstract

PURPOSE: A manufacture apparatus for producing contact lens is provided to prepare the lens in automation process by adopting PLC control and to produce varied degrees of the lens by applying UV lamp to sterilize/dry the lens. CONSTITUTION: The apparatus comprises a tool for supplying a lens formation frame; a sliding plate(50) having a fitting groove for the lens formation frame at one end; a spindle to deliver the frame to a fixture component(60); a nitrogen gas supply duct around the spindle; a forming solution supplying component(100) on the fixture component; a pneumatic pressure component(110) to keep vacuum pressure; a server motor axially connected to the fixture component(60); the UV lamp(130) to sterilize/dry the lens; and the PLC controller(10) to adjust entire movement of the apparatus.

Description

Manufacture Apparatus of Contact Lens with Automatic Process}

The present invention relates to an apparatus for manufacturing a contact lens, and more particularly, to automate lens manufacturing by PLC (program logic control) control, and to automatically supply the molding liquid to the lens mold and to supply the molding liquid and the rotational speed of the server motor. The present invention relates to a contact lens manufacturing apparatus capable of controlling the number of lenses due to sterilization / drying using an ultraviolet lamp as well as controlling them properly, and to enable an automated process to increase productivity by automating all processes.

In general, the proportion of snow in our bodies is almost absolute, but it doesn't seem like an overkill. Man will not be able to do everything himself without seeing. Therefore, each of us trying to protect our vision is close to the duty, and if the refractive error is already corrected through contact lenses and glasses.

The contact lens refracts the light into the desired shape in direct contact with the eye, ie, the cornea surface, and corrects the vision. It is combined with the tear layer on the cornea, and unlike glasses, it is fixed to the eye instead of being fixed to the face. There is an optical advantage that cannot be solved. In other words, the lens is not blurred, there is no prism action, the field of view is wider, and the magnification difference of the image is much smaller, even though the astigmatism is corrected due to the irregularities of the cornea and the environmental conditions due to the difference in temperature and humidity are not blurred. have.

As a general method for manufacturing the contact lens, a casting method and a lathe cutting method are used, and the casting method is divided into a fixed casting method and a rotation casting method.

The fixed casting method is a method of making a contact lens by inserting a monomer between a convex mold and a concave mold to scan ultraviolet rays, and has the advantage of making a large number of lenses while maintaining the same reproducibility. In practice, however, it is very difficult to produce very sophisticated female and mold molds to make these molds because there are many things that need to be strictly controlled in order to produce lenses of the same quality and many molds are required according to curvature, frequency, thickness and balance. In the light of the severe design change of the lens, it is difficult to change the mold from time to time because it is necessary to catch the design according to eye conditions.

The rotary casting method is a method of manufacturing a contact lens in which a monomer is injected into a concave mold and photopolymerized by centrifugal force and ultraviolet rays due to rotation. Although the curvature of the contact lens concave surface varies according to the frequency, it is difficult to manufacture the high myopia lens, and it may be accompanied by changes in optics, bevel, center thickness, and diameter, and defects in manufacturing technology. Can be. For example, there are many factors such as rotational speed, monomer injection amount and polymerization rate, and it is difficult to round the edges of the lens.

The lathe cutting method is a method of manufacturing the concave and convex surfaces of a contact lens by cutting them with a lathe and polishing the fine concavo-convex surface of the surface with a polishing machine. This method is easy for the manufacturer to give a variety of curved surfaces on both sides can always be changed according to the requirements of the consumer, but it was difficult to always maintain the constant curvature of the diameter or the concave surface of the lens, there was a problem that mass production is difficult.

The present invention was devised to solve the above problems, and an object of the present invention is to automate the lens manufacturing by PLC (program logic control) control and to automatically supply the molding liquid to the lens mold and to supply the molding liquid and the server motor. By controlling the number of revolutions of the appropriate number and by using a UV lamp sterilization / drying can be produced by varying the frequency of the lens and to provide a device that can increase the productivity by automating all processes.

The present invention for achieving the above object, the lens molding frame supply mechanism 20 for laminating and storing the lens molding frame 30, and the lens molding frame 30 is advanced by the cylinder 40, the piston operation A slide plate 50 having a lens mold fitting groove 51 formed at an end thereof so as to be operated and supplied one by one, and installed on an upper portion of the slider plate 50 to fix the lens mold by an air pressure. Spindle 70 to be transferred to the member 60, the outer peripheral surface of the spindle 70, the nitrogen gas supply member 80 for receiving a nitrogen gas to block the contact with air during lens manufacturing, and the lens molding frame Is formed on the upper side of the fixing member 60, the molding liquid supply member 100 for supplying the molding liquid to the lens molding frame 30, and the manufactured lens by the spindle 70 and the slide plate 50 Pneumatic supply pipe member 110 to maintain the vacuum pressure when discharged to the outside And a server motor 120 which is axially connected to the lens mold fixing member 60 and rotates, an ultraviolet lamp 130 for sterilizing / drying a lens seated on the lens mold, and controls the overall operation of the contact manufacturing apparatus. PLC control panel 10 is made.

In addition, a lens sterilization / drying guide plate 140 in which the transparent glass member 150 is placed is provided at the lower side of the ultraviolet lamp so as to appropriately adjust the ultraviolet intensity irradiated by the lens in the contact lens forming frame 30.

1 is a schematic external perspective view of an apparatus for manufacturing a contact lens capable of an automated process according to the present invention;

Figure 2 is a schematic cross-sectional view of a contact lens manufacturing apparatus capable of an automated process of the present invention,

Figure 3 is a partially enlarged perspective view of a contact lens manufacturing apparatus capable of an automated process of the present invention,

4 is a partially enlarged view showing the operation of the slider plate in FIG.

FIG. 5 is a detail view of portion “A” in FIG. 4,

6 is a control block diagram of a contact lens manufacturing apparatus capable of an automated process of the present invention.

Explanation of symbols on the main parts of the drawings

10: PLC control panel 20: lens molding frame supply mechanism

30: lens molding frame 40: cylinder

50: slider plate 51: lens molding groove

60: lens molding frame fixing member 70: spindle

80: nitrogen gas supply pipe 90: moving rail

100: molding liquid supply unit 110: pneumatic supply pipe member

120: server motor 130: ultraviolet lamp

140: sterilization / drying guide plate 150: transparent glass member

160: moving body for lens molding

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described.

1 is a schematic external perspective view of a contact lens manufacturing apparatus capable of an automated process of the present invention, FIG. 2 is a schematic cross-sectional view of a contact lens manufacturing apparatus capable of an automated process of the present invention, and FIG. 3 is an automated process of the present invention. A partially enlarged perspective view of a possible contact lens manufacturing apparatus, FIG. 4 is a partially enlarged view showing the operation of the slider plate in FIG. 1, FIG. 5 is a detailed view of the portion "A" in FIG. 4, and FIG. As a control block diagram of a contact lens manufacturing apparatus capable of an automated process, a PLC (program logic control) control panel 10 is provided on the front right side of the contact lens manufacturing apparatus of the present invention, as shown in the drawing, to provide an overall contact manufacturing apparatus. It generates an electrical signal that controls its operation.

In addition, a lens molding frame supply mechanism 20 for stacking and storing the lens molding frame 30 is formed on the left side of the PLC control panel 10, and the lens molding frame 30 has a piston 40 that is piston operated. It is operated in the forward / backward direction by the slide plate 50 for supplying one by one is provided.

A lower portion of the slider plate 50 is provided with a spindle 70 so as to transfer the lens mold 30 to the upper lens mold fixing member 60 by pneumatic pressure.

The outer peripheral surface of the spindle 70 is provided with a nitrogen gas supply pipe member 80 for supplying nitrogen gas to block contact with air when the lens is manufactured, so that the supplied nitrogen gas is the lens mold fixing member 60 when the lens is manufactured. Is sprayed into the inner side.

In addition, the lens molding frame fixing member 60 is provided with a finger member (not shown) to fix / support the lens molding frame supplied from the lower side therein to prevent flow or departure during the manufacturing process.

On the upper side of the lens molding frame fixing member 60 is operated by a pneumatic cylinder and guided to the conveying rail 90 to move the left and right molding liquid supply member 100 and the finished lens the spindle 70 And a pneumatic supply pipe member 110 for maintaining a vacuum pressure when discharged to the outside by the slide plate 50).

Here, the molding liquid supply member 100 has a lens molding liquid embedded therein, so that the appropriate amount is supplied to the lens molding frame 30. The molding liquid supply member 100 may manufacture a lens having a desired frequency by adjusting the supplied molding liquid.

In addition, the lens mold fixing member 60 is connected to the motor shaft to be rotated at a predetermined RPM by the server motor 120, is fixed / supported in the lens mold fixing member 60 and the lens molding liquid is The injected lens molding frame 30 is configured to be sterilized / dried by the ultraviolet lamp 130 which is moved left / right by a cylinder operation.

The lens sterilization / drying guide plate 140 in which the transparent glass member 150 is placed is provided at the lower side of the ultraviolet lamp so as to appropriately adjust the ultraviolet intensity irradiated by the lens in the contact lens forming frame 30.

That is, the sterilization / drying guide plate 140 is moved to the left side by the pneumatic cylinder to be positioned on the upper side of the lens mold fixing member 60, so that the ultraviolet rays generated from the ultraviolet lamp 130 are transparent glass members. While passing through 150, the amount of ultraviolet light is controlled to sterilize / dry the lens in the lens mold fixing member 60 located below.

On the other hand, such an overall control operation is such that the control signal of the PLC control panel 10 is generated by the server motor 120, the pneumatic cylinder, the ultraviolet lamp 130 and the like.

Referring to the operation of the present invention configured as described above are as follows.

First, when the power source for driving the lens manufacturing apparatus is turned on and the operation (start) button formed in the PLC control panel 10 is operated, the lens molding frame 30 stacked on the lens molding frame supply device 20 is pneumatically compressed. The cylinder 40 is moved by the lens forming frame fitting groove 51 of the slider plate 50 operated in the forward / backward direction and supplied one by one.

The supplied lens molding frame 30 is moved upward by the spindle 70 to be fixed / supported in the lens molding frame fixing member 60.

Thereafter, the PLC control panel 10 generates a control signal to control the piston operation of the pneumatic cylinder so as to inject the lens molding solution into the lens molding frame 30, thereby moving the lens molding moving body 160 to the right.

Subsequently, when a proper amount of lens molding liquid is injected into the lens molding frame 30, the PLC control panel generates a control signal for operating the server motor 120 connected to the shaft molding member 60 to rotate the lens molding frame fixing member 60.

When the lens mold is rotated, the lens molding liquid is molded into a lens having an appropriate thickness by centrifugal force. In this process, nitrogen gas is injected into the lens mold fixing member 60, and the lens is formed by air. Block contact with

Subsequently, when the lens forming movable body 160 is moved to the left side by the pneumatic cylinder operation, the sterilization / drying guide plate 140 and the ultraviolet lamp 130 are positioned above the lens mold fixing member, and the operation of the ultraviolet lamp is performed. As the ultraviolet rays pass through the transparent glass member 150, the intensity of the ultraviolet rays is controlled and then irradiated onto the lens.

When the lens irradiated with ultraviolet rays is sterilized / dried and then molded, the pneumatic cylinder is controlled to be moved to the right according to the control signal of the PLC control panel, and the movable body 160 for forming the lens is fixed to the lens molding frame fixing member ( 60) is located at the top.

Subsequently, the sterilized / dried lens is guided downward through a hole formed in the center portion of the lens mold fixing member and then discharged to the outside by the forward operation of the slider plate 50.

That is, when the pneumatic supply pipe member 110 formed on the upper portion of the lens forming movable body 160 controls the pneumatic pressure to maintain the vacuum pressure, the sterilized / dried lens is slowly guided and dropped into the product (lens) in this process. Will not cause damage.

As mentioned above, according to the present invention, the lens manufacturing can be automated by PLC (program logic control) control, and the molding liquid is automatically supplied to the lens molding frame and the supply amount of the molding liquid and the rotation speed of the server motor are properly controlled. In addition, it can be manufactured by varying the frequency of the lens by sterilizing / drying using an ultraviolet lamp, and has the effect of increasing productivity by automating all processes.

Claims (2)

The lens molding frame supply mechanism 20 for stacking and storing the lens molding frame 30 and the lens molding frame 30 at the end of the lens molding frame 30 are moved forward by one of the cylinders 40 which operate a piston. A slide plate (50) having a frame fitting groove (51) formed thereon, and a spindle (70) installed at an upper portion of the slider plate (50) to transfer the lens mold to the upper lens mold fixing member (60) by pneumatic pressure. ) And a nitrogen gas supply pipe member 80 for receiving nitrogen gas so as to block contact with air when the lens is manufactured on the outer circumferential surface of the spindle 70 and an upper side of the lens mold fixing member 60. Pneumatic supply pipe for maintaining the vacuum pressure when the molding liquid supply member 100 for supplying the molding liquid to the mold 30 and the finished lens to the outside by the spindle 70 and the slide plate 50 The member 110, the lens mold fixing member 60 and the shaft It is possible to perform an automated process consisting of a server motor 120 for rotating and a UV lamp 130 for sterilizing and drying the lens seated on the lens mold, and a PLC control panel 10 for controlling the overall operation of the contact manufacturing apparatus. Contact lens manufacturing apparatus. The lens sterilization / drying guide plate 140 of claim 1, wherein the transparent glass member 150 is placed on the lower side of the ultraviolet lamp so as to appropriately adjust the UV intensity irradiated by the lens in the contact lens forming frame 30. Contact lens manufacturing apparatus capable of an automated process characterized in that it is further provided.