KR102081498B1 - Method and Device for injecting monomer in mold for manufacturing optical material - Google Patents

Abstract

The present invention is to wrap the tape on the outer peripheral surface of the injected mold and inject the monomer solution into the cavity formed therebetween vision vision change of the monomer solution injected into the cavity to precisely control the injection amount of the monomer solution using a vision recognition system When the oil level change shape of the monomer solution to be injected is matched to the previously stored monomer oil level change shape by comparing the photographed oil level change with the stepped oil level change shape of the pre-stored monomer solution, the controller steps the injection amount of the injector step by step. The monomer solution can be injected into the cavity while adjusting to.

Description

Automatic injection method and automatic injection device of monomer for optical material {Method and Device for injecting monomer in mold for manufacturing optical material}

The present invention relates to a method and apparatus for manufacturing an optical material by injecting a monomer solution into a cavity formed between a pair of molds having an outer seal, and more particularly, to change the oil level of the monomer injected using a vision recognition system. The present invention relates to an automatic mold injection method and an automatic injection device of a monomer for an optical material, which enables to precisely control the injection amount according to the change of oil level while checking in real time.

In optical materials, plastic lenses have advantages of being lighter than glass lenses, not easily broken, and having good workability. In recent years, plastic lenses are used more than glass lenses. Such a plastic lens is manufactured by injecting a polymer compound called a monomer into a mold and hardening it, followed by appropriate post-processing. That is, the monomer solution is manufactured by injecting a monomer solution into a mold having a lens-shaped empty injection space (cavity).

As a related art related art, Patent Document 1 (Korean Registered Utility Model No. 20-0236704) has disclosed a 'moving distance setting device of a mold for manufacturing an eyeglass lens'.

The Patent Document 1 is a state in which the glass molds are spaced apart from each other using a mold chuck to accurately determine the separation distance of the glass mold for manufacturing the spectacle lens, the adhesive is taped to the outer peripheral surface of the glass mold and the monomer on the glass mold is completed The method of injecting the solution manually is introduced.

By the way, since the technique of manually injecting the monomer into the glass mold as disclosed in Patent Document 1 depends entirely on the skilled person of the injector, a defect may occur depending on the skill and the work efficiency is inferior. In particular, since a large amount of skill is required to precisely inject a predetermined amount of monomer every time, there is a problem that bubbles may occur in the mold in the case of an inexperienced person.

In addition, the liquid monomer generates a volatile gas harmful to the human body, it may adversely affect the health of the operator when working for a long time.

Patent Document 2 (Korean Patent No. 10-1383132) discloses a monomer auto-injection equipment for eyeglass lenses and a method for producing eyeglass lenses using the same.

Patent document 2 is intended to increase the productivity of the product in the manufacturing site by reducing the injection of raw materials into the mold, to reduce the defect rate, and to pursue an environment-friendly manufacturing environment, the device of patent document 2 is a mold seat, tape It includes a detachable portion, a monomer injection portion, it is possible to automatically inject the monomer for the lens by the lens mold supply step, the mold seating step, tape detachment step, monomer injection step, tape attachment step, lens mold discharge step.

Meanwhile, in Patent Document 2, the position of the lens mold is determined by using a displacement sensor (laser sensor) for detecting the position of the lens mold in the step of injecting the monomer solution into the cavity formed by the pair of molds. It is to detect the water level of the raw material to be filled in the lens mold by the moving unit, and the injection amount of the monomer of the injection nozzle is controlled by the injection amount adjusting unit, but when the monomer reaches a certain level, the amount of monomer injected is It is to be adjusted to 5mm and 10mm in two steps.

However, when detecting the water level of the raw material (monomer solution) using a displacement sensor as in Patent Document 2, the monomer solution is more viscous than water, so that the change in the water level is not a horizontal change but a two-dimensional symmetric parabola. Because of this, there was a problem that it is difficult to accurately detect the water level in real time, and because of this, it is difficult to inject the correct amount despite the step-by-step adjustment of the injection amount, so that the injection amount is insufficient or the injection amount is excessive, resulting in poor product and overflowed monomer solution. Due to the contamination of the injection equipment there was a concern that it will interfere with the stable operation.

In addition, `` Plastic product manufacturing method and manufacturing apparatus '' of Patent Document 3 (Japanese Patent No. 3707189) is a method for automating the process of injecting a plastic stock solution into a molding mold during a plastic lens manufacturing process. The first flow rate and the first time are set by measuring the width between the first and second wall portions, and the first step of injecting the plastic stock solution for the first time at the first flow rate into the cavity; and the first step following the first step. It has a second process of injecting the plastic stock solution at a second flow rate less than the flow rate so as to inject the stock solution at a large flow rate only for a predetermined time, and then, after the injection of the stock solution at a small flow rate toward the end of the injection, At the same time, the amount of leakage can be reduced.

On the other hand, in the injection method according to Patent Document 3, in order to reduce the injection time and the leakage amount by reducing the injection amount and injection time of the plastic raw materials in consideration of the spatial characteristics inside the cavity, but for manufacturing the lens When the plastic raw material is injected into the lens mold, it does not take into account the oil level change characteristic of the highly viscous plastic raw material, which still does not effectively prevent leakage of the plastic raw material or does not optimally control the injection amount of the plastic raw material.

In `` Plastic Lens Molding Method '' of Patent Document 4 (Japanese Patent Laid-Open No. 2007-80766), bubbles are not left as much as possible when injecting the liquid molding material into the mold in the same manner as pouring a glass by tilting a glass. Initially, the inlet is deviated to one side from the upper center in the middle so that it can be filled without filling, and when the injection is proceeded to some extent, the mold is rotated (tilt) so that the inlet is located in the upper center of the center to fill the raw monomer. A molding method of a plastic lens is disclosed.

On the other hand, in patent document 4, although it is a suitable method to inject a raw material so that a foam | bubble does not remain, it is insufficient in inject | pouring a raw material by an exact amount.

Korea Registration Utility Model No. 20-0236704 (Registered on June 21, 2001) Korea Patent Registration No. 10-1383132 (2014.04.02. Registration) Japanese Patent No. 3707189 (registered on August 12, 2005) Japanese Laid-Open Patent No. 2007-80766 (2008.04.10.)

The present invention has been made to solve the above problems, the object of the present invention is to precisely control the injection amount while confirming in real time through the vision recognition system the change of the surface of the monomer solution to be filled in the mold to manufacture the optical material In addition, it is possible to produce a lens of high quality by supplying the monomer with the optimum flow rate at all times, as well as the automatic mold injection method of the monomer for the optical material and the automatic injection device used in the method, which are excellent in productivity and rarely cause defects. To provide.

The present invention to achieve the above object

A method of injecting a monomer solution into a monomer injector into a cavity formed between a pair of molds having an outer seal,

(a) photographing the oil level change of the monomer solution injected into the cavity with a vision recognition system;

(b) comparing the photographed oil level change with the oil level change shape of the monomer solution stored in advance;

(c) if the oil level change shape of the monomer solution injected as a result of the comparison coincides with the previously stored monomer oil level change shape, a controller injecting the monomer solution into the cavity while adjusting the injection amount of the monomer injector step by step; It provides a mold automatic injection method of a monomer for an optical material.

Preferably, the vision recognition system is installed on the front of the mold, the backlight is installed on the back of the mold is a two-dimensional vision recognition system installed on the front of the mold by the light irradiated from the backlight is the two-dimensional surface of the monomer solution is formed Take a picture of the shading of the shape and the outline of the mold.

Preferably, the pre-stored monomer oil surface change shape is provided with a zone for changing the injection amount step by step at a plurality of points of the oil surface formed when the monomer solution is injected, and when the photographed oil surface reaches the zone, The injection amount of the monomer injector is controlled to be reduced to the next set step. More preferably, the pre-stored monomer surface change shape is provided with a zone for changing the injection amount step by step at a plurality of points of the shoulder portion of the parabolic oil surface formed when the monomer solution is injected.

Preferably, the injector is controlled such that the nozzle end enters the cavity inside the cavity during the injection of the monomer solution, and exits out of the cavity in the immediately preceding step.

In one embodiment of the present invention, the pair of molds are sealed and supplied with an adhesive tape. In this case, preferably, the nozzle of the monomer injector is inserted into the cavity in the state in which the adhesive tape is partially opened immediately before the monomer solution is injected, and then resealed after the monomer solution is injected.

In addition, the present invention

An apparatus for injecting a monomer solution into a monomer injector into a cavity formed between a pair of molds having an outer seal,

A monomer injector for injecting a monomer solution into the cavity of the mold;

A vision recognition system for photographing a change in oil level of the monomer solution injected into the cavity;

The oil level change image photographed by the vision recognition system is compared with the oil level change shape of the pre-stored monomer solution, and when the oil level change shape of the monomer solution to be injected coincides with the pre-stored oil level change shape, the injection amount of the monomer injector is gradually phased. It provides a mold automatic injection device of a monomer for an optical material comprising a controller for adjusting to.

In one embodiment of the present invention, the pair of molds are sealed with an adhesive tape on the outside thereof, and the automatic injection device forms a monomer injection hole by removing a portion of the adhesive tape from the mold, and then removes the adhesive tape after injection of the monomer solution. It further includes a tape detacher to reattach.

Preferably, the tape detacher includes a gripper that operates to grasp and release one side of the adhesive tape and attach the tape back to its original state, and a servo motor for allowing the gripper to operate similar to the rotational operation of the wrist. .

Preferably, the tape detacher further includes a roller for close contact with the outside of the mold when the adhesive tape is reattached.

According to an embodiment of the present invention, when the viscosity of the monomer solution is injected into the cavity inside the mold in real time, the amount of the monomer solution may not be overflowed by controlling the injection amount step by step according to the oil level change. Because it is not injected accurately, it is possible to produce a lens of uniform quality and improve the injection speed of the monomer, thereby maximizing the efficiency of the monomer injection operation. Accordingly, it is possible to prevent failure due to insufficient injection amount of the monomer solution and to prevent abnormal operation or failure of equipment caused by excessive injection of the monomer solution.

In addition, it is possible to automate and mechanize all operations such as taping, removing tapes, injecting monomers, injecting monomers and reattaching tapes, and discharging molds injecting monomers. This can solve the problem of exposure to the drug.

1 is a plan configuration diagram of a lens manufacturing apparatus according to an embodiment of the present invention;
2 is a three-dimensional configuration diagram of a lens manufacturing apparatus according to an embodiment of the present invention;
3 is a flowchart illustrating a lens manufacturing process according to an embodiment of the present invention;
4 is a main configuration diagram of the automatic monomer injection device shown in FIG.
5 is a front view schematically showing a state in which a monomer solution is injected into the mold cavity in FIG.
Figure 6 is an enlarged view showing a step injection state of the monomer solution in the present invention,
Figure 7 is a graph for explaining the change in the injection amount of the monomer solution in the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

1 and 2 schematically show the overall configuration of a lens manufacturing apparatus to which the automatic monomer injection method and the automatic injection device of the present invention are applied, and FIG. 3 shows a lens manufacturing apparatus of the lens manufacturing apparatus shown in FIGS. 1 and 2. The process is shown in sequence, and Figure 4 shows the monomer auto-injection apparatus according to the present invention, the lens manufacturing apparatus shown is a tray loader 10 and a plurality of mold (see FIGS. A loader for picking and lifting the mold from the tray loader 10, and a first transfer device for transferring the mold to a process of aligning and taping a pair of molds supplied from the loader picker 20 ( 30) and a tape attaching unit 40 for aligning the pair of molds conveyed by the first transfer unit 30 to attach the adhesive tape to the outside, and the adhesive attaching tape with the tape attaching unit 40. A tape loading unit 50 for supplying urgent, second and third transfer units 60 and 70 for transferring the mold taped outwardly from the tape attaching unit 40 to the next process, and the third transfer unit 70 A tape for partially peeling off and re-attaching the inverter 80 for inverting the mold transferred from the mold) and the upper adhesive tape T in a state in which the mold inverted by the inverter 80 is held up and gripped. Monomer injector (100), Monomer injector (100) for injecting monomer solution (S) into the cavity inside the mold (M) where the inlet (I) is secured by the tape detacher (90), and the monomer injector It comprises an unloader picker 110 and a tray unloader 120 for unloading the mold (M) in which the monomer is injected at 100 and the adhesive tape (T) is closed with the tape detacher (90). .

The tray loader 10, the loader picker 20, the first transferr 30, the tape attachment unit 40, the tape loading unit 50, the second and third transferrs 60 and 70 and the inverter 80. And the unloader picker 110, the tray unloader 120 is composed of a general mechanism for loading, conveying, outer taping, reversing and unloading the male and female mold in the lens manufacturing field to which the present invention belongs. Detailed description thereof will be omitted, and in the lens manufacturing apparatus shown in FIGS. 1 and 2, as shown in FIG. 3, the mold loading (S10), taping (S20), tape opening (S30), and monomer injection ( S40), the tape is closed (S50), and the mold unloading (S60) step to produce a lens, and after the curing step of the monomer to remove the lens from the mold to complete the lens.

However, if these components are briefly described, the tray loader 10 loads a plurality of male and female molds on a tray in a vacuum suction method and supplies them to a loading position, and the loader picker 20 is loaded at the loading position. The mold is to be picked up and transferred to the first transferr 30. The barcode reader recognizes a barcode applied to the male and female molds, and sequentially picks up one female mold and one male mold to be transferred to the first transferr 30. Done.

The first transfer device 30 transfers the mold received from the loader picker 20 to the tape attachment unit 40, and the tape attachment unit 40 vacuums a pair of male and female molds from the upper and lower sides. After adjusting the position (spacing) between the mold with the electrode signal in the state picked up by using a step motor to wrap the adhesive tape around the upper and lower male and female molds to form a cavity for filling the monomer solution inside the mold.

The tape loading unit 50 supplies the transparent adhesive tape to the tape attaching unit 40. The tape loading unit 50 releases and supplies the dried adhesive tape in a reel state and cuts it with a cutter when the taping operation is completed.

The second transfer unit 60 and the third transfer unit 70 serve to transfer the mold discharged from the tape attaching unit 40 to the inverter 70, and the inverter 80 has a tape attached thereto. For inverting the mold up and down, before the mold product is seated on the third transfer 70, the remaining position of the tape wound around the mold is directed upward so that interference occurs during clamping at the chuck of the monomer injector 100. I will not do it.

On the other hand, the third transfer unit 70 serves to transfer the mold to which the injection of the monomer solution is completed to the position for the unloader picker 110 to pick up.

The unloader picker 110 transfers the mold on which the monomer solution is completed by the monomer injector 100 and the tape is reattached to the tray on the tray unloader 120 in a vacuum suction method, and the tray unloader 120. ) Receives the mold at the transfer position and when the loading of the mold is completed, the tray is discharged to the outside.

In the lens manufacturing apparatus illustrated in FIGS. 1 and 2, a mold loaded in a tray is transferred to a monomer injection device using a picker and a transfer method, and a transfer and a picker are again supplied after monomer injection is completed. However, the present invention is not limited thereto, but the present invention is not limited thereto, and the mold may be transferred to a monomer injection device using a conveyor method, and then applied to a lens manufacturing apparatus of a method of discharging again by a conveyor method after monomer injection. Of course you can.

Hereinafter, a method of injecting monomer into a cavity in a mold in the automatic monomer injection device, which is a main part of the lens manufacturing apparatus, will be described in detail.

Figure 4 shows an automatic monomer injection device according to a preferred embodiment of the present invention, which is part of the adhesive tape (T) peeled off the adhesive tape (T) in the outer portion sealed with the adhesive tape (T) monomer injection Forming the inlet (I) for the purpose, injecting the monomer solution (S) into the cavity inside the mold (M) through the inlet (I), and then reattach the peeled adhesive tape (T) (90) )Wow;

A monomer injector (100) for injecting a monomer solution (S) into the cavity of the mold (M);

A vision recognition system 130 for photographing a change in oil level of the monomer solution S injected into the cavity of the mold M;

The oil level change image photographed by the vision recognition system 130 is compared with the oil level change shape of the pre-stored monomer solution, and when the oil level change shape of the monomer solution to be injected coincides with the pre-stored oil level change shape, the monomer injector ( It comprises a; controller (not shown) for stepwise adjusting the injection amount of 100).

The tape detacher 90 has a gripper 92 which is operated by pneumatic pressure so as to grasp one side of the adhesive tape T and attach it back to its original state, and the gripper 92 is similar to the rotational movement of the wrist. It comprises a servo motor 94 to enable the operation, the tape detacher 90 is the front and back movement for approach and separation toward the mold (M), and peel off the adhesive tape of the mold outside again Although not shown in the drawings, the forward and backward cylinders, the Y-axis orthogonal robot, and the Z-axis orthogonal robot are provided so that the left and right sliding operation and the vertical lifting operation for attaching are performed.

The monomer injector 100 grips the mold M supplied from the third transfer 70 so that the chuck G is maintained in a vertical position. In this state, the monomer injector 100 is lifted upward to inject the monomer. Waiting in the position, in order to secure the injection port (I) in the injection position, the detachment operation of the adhesive tape (T) is made by the above-described tape detacher (90), the adhesive tape (T) is removed in the monomer The injector 100 is lowered so that the nozzle 102 is inserted into the injection port I to inject the monomer solution S. The injection amount of the monomer solution S is controlled by the flow control valve 104. And injection time is controlled.

The control of the flow control valve 104 is made by a controller (not shown), which is a feedback control by the image signal sensed by the vision recognition system 130, which will be described later. .

In addition, the chuck G may be attached to the adhesive tape T in its original state while rotating horizontally by a rotation cylinder (not shown) when the adhesive tape T is reattached by the tape detacher 90 described above. The tape detacher (90) is provided with a roller (not shown) for adhesion to the outside of the mold (M) when the adhesive tape (T) is reattached to press the outside of the adhesive tape (T). Is given.

The vision recognition system 130 is installed on the front (front) of the vertical mold (M), the back of the mold (M) has a backlight 132 is installed by the light emitted from the backlight 132 The vision recognition system 130 installed at the front of the mold M captures the two-dimensional shape formed by the oil surface of the monomer solution S injected into the mold M, and the controller by capturing the external contour of the mold M. Video signal is transmitted through

On the other hand, the vision recognition system 130 is configured to be slid in the left and right direction by a pneumatic cylinder or the like so as not to interfere with the tape detacher 90, the mold (M) during the injection operation by the monomer injector 100 ) And the backlight 132 line up and return to the standby position during the detachment and reattachment of the adhesive tape.

The controller compares the oil level change image photographed by the vision recognition system 130 with the oil level change shape of the monomer solution S stored in advance, and the oil level change of the monomer solution S injected into the cavity of the mold M. FIG. When the shape is matched with the previously stored monomer oil level change shape, the monomer solution S is injected to be filled in the cavity while adjusting the injection amount of the flow control valve 104 of the monomer injector 100 step by step.

In the present embodiment, the monomer solution S injected into the cavity of the mold M through the nozzle 102 of the monomer injector 100 is a liquid having a predetermined viscosity (viscosity). As shown in the figure, a two-dimensional surface change such as a parabola rather than a horizontal line is filled in the cavity.

That is, when the monomer solution S discharged downward from the nozzle 102 of the monomer injector 100 is filled in the space (cavity) of the circular cross section (viewed from the front as shown in FIG. 5) formed inside the mold M Since the viscosity is relatively higher than that of general water or other fluids, the remains are not broken, and the oil level in the middle portion is high enough to correspond to the end position of the nozzle 102, and the left and right shoulder portions form a low oil level (L). The so-called parabola oil level is formed, and as the injection of the monomer solution S proceeds, the left and right oil levels gradually increase along the arrow, and the air inside the cavity is discharged to the outside through the inlet I. In order to measure the oil level change (injection amount) when the monomer solution (S) is filled in the cavity, it is accurate to track the parabolic oil level (L). It is necessary to target several points on the shoulder of the oil surface (L).

Therefore, in the embodiment of the present invention, by measuring the oil surface change shape of the shoulder portion formed by the oil surface of the parabolic monomer solution (S) and changing the injection amount in multiple stages based on this, the injection amount of the monomer solution is not insufficient and is not excessive. It can be controlled to supply only the correct amount.

In FIG. 5, the symbol V indicates an image range photographed by the vision recognition system 130 or an image range displayed on a monitor, and measures the oil level change (level) of the monomer solution having a tendency as illustrated in FIG. 5. In order to control the injection amount according to the oil level change, as shown in FIG. 6, the pre-stored monomer oil change shape is a region for changing the injection amount step by step at a plurality of points of the shoulder portion of the oil surface formed when the monomer solution is injected. , P2, P3, P4, P5 are set, and the oil level L1, L2, L3, L4, L5 taken in real time by the vision recognition system 130 is located in the area P1, P2, P3, P4. When reaching, the controller adjusts the injection amount of the monomer injector 100 to the next set step so that the monomer solution can be filled in the cavity of the lens mold by the correct amount.

FIG. 7 illustrates a state in which the injection amount of the monomer solution according to the oil phase change shape shown in FIG. 6 is changed. When the oil surface L1 of the monomer solution actually injected in FIG. 6 reaches the first zone P1, FIG. The injection amount up to is about 90% of the total injection amount, and when the oil level L1 of the monomer solution reaches the first zone P1, the controller reduces the opening degree of the flow control valve 104 of the monomer injector 100 to reduce the injection amount. When the oil level L2 of the monomer solution reaches the second zone P2 again, the controller further reduces the opening of the flow control valve 104 of the monomer injector 100 to reduce the injection amount to the second. When the oil level L3 of the monomer solution reaches the third zone P3 again, the controller further reduces the opening degree of the flow control valve 104 of the monomer injector 100 so that the injection amount is increased. Is reduced to the third (in this case, the injection amount is about 9 8%), when the oil level (L4) of the monomer solution reaches the fourth zone (P4), that is, the position of the outer surface slightly lower than the top of the mold (M) to close the flow control valve 104 ( At this time, the injection amount is about 99 to 100%), which means that the monomer solution (S) is not horizontal to the surface due to the flow force at the time of injection. The outer surface of the mold M is matched.

According to the automatic monomer injection method and the automatic injection device of the present invention described above, a large amount of the monomer injection amount is injected in a short time up to a predetermined interval, and the subsequent injection is performed while gradually decreasing the injection amount of the monomer in small increments from the subsequent interval. According to the viscosity and shape characteristics of the mold, it is possible to inject the correct amount of monomers without shortage or overflow, and as a result, the injection time of monomers can be shortened. There is an advantage to be able to manufacture the lens of, there is also an advantage such that the failure caused by the shortage or excessive amount of monomer injection, and does not cause malfunction of the manufacturing apparatus.

On the other hand, the fifth zone (P5) is a zone for detecting the excessive injection of the monomer solution (S), it is to detect that the error in the injection amount of the monomer solution due to poor setting of the monomer injector or other external factors. When the oil level of the monomer solution is detected in the fifth zone (P5), the inspection and resetting of the equipment is necessary, so the inspection signal is sent.

In addition, the nozzle 102 of the monomer injector 100 maintains a state in which the end of the nozzle 102 enters the cavity as shown in FIG. 5 when the monomer solution is injected, and immediately before the last step (P3). The operation is controlled to exit out of the cavity at.

In this embodiment, a method of controlling the injection amount of the monomer solution by assuming a virtual mold is described. However, since the cross-sectional shape of the mold for manufacturing the spectacle lens varies, the volume of the cavity and the shape of the cavity are different. Since the viscosity (viscosity) also varies depending on the type, the shape of the oil surface changes when the monomer is injected.

Therefore, the characteristics of the different surface shape changes according to the type of the mold and monomers are measured, and the image and the detection zone (P1 to P5) for the different surface shape changes according to the type of the mold and the type of monomer are used in the controller. You need to save it differently.

10: tray loader
20: loader picker
30: first transfer
40: tape attachment unit
50: Tape Loading Unit
60: second transfer
70: third transfer
80: inverter
90: tape detacher
92: Gripper
94: servo motor
100: monomer injector
102: nozzle
104: flow control valve
110: unloader picker
120: tray unloader
130: Vision Recognition System
132: backlight
G: Chuck
I: inlet
L, L1 ~ L5: Oil Cotton
M: Mold
P1 ~ P5: Zone
S: monomer solution
T: Adhesive Tape
V: Video range

Claims (15)

A method of injecting a monomer solution into a monomer injector into a cavity formed between a pair of molds having an outer seal,
(a) photographing the oil level change of the monomer solution injected into the cavity with a vision recognition system;
(b) comparing the photographed oil level change with the oil level change shape of the monomer solution stored in advance;
(c) if the oil level change shape of the monomer solution injected as a result of the comparison coincides with the previously stored monomer oil level change shape, a controller injecting the monomer solution into the cavity while adjusting the injection amount of the monomer injector step by step; Automatic mold injection method of a monomer for an optical material.
The method according to claim 1,
The vision recognition system is installed on the front of the mold, the backlight is installed on the back of the mold and the vision recognition system installed on the front of the mold by the light irradiated from the backlight of the two-dimensional shape shading and the surface of the monomer solution and An automatic mold injection method of a monomer for an optical material, characterized by photographing the outline of the mold.
The method according to claim 1,
In the pre-stored monomer oil surface change shape, a zone for changing the injection amount in stages is set at a plurality of points of the oil surface formed when the monomer solution is injected, and when the photographed oil surface reaches the zone, the controller of the monomer injector Mold injection method of a monomer for an optical material, characterized in that the injection amount is adjusted to the next set step.
The method according to claim 3,
In the pre-stored monomer oil surface change shape, a zone for changing the injection amount step by step is set at a plurality of points of the shoulder portion of the parabolic oil surface formed when the monomer solution is injected. .
The method according to claim 1,
The monomer injector is a mold injection method of the monomer for the optical material, characterized in that the nozzle end is maintained to enter the cavity inside the cavity during injection of the monomer solution, and exited to the outside of the cavity in the last step of the last step.
The method according to claim 1,
And the pair of molds are sealed and supplied with an adhesive tape.
The method according to claim 6,
And the nozzle of the monomer injector is inserted into the cavity in a state in which the adhesive tape is partially opened immediately before the monomer solution is injected, and the monomer solution is injected and then resealed.
An apparatus for injecting a monomer solution into a monomer injector into a cavity formed between a pair of molds having an outer seal,
A monomer injector for injecting a monomer solution into the cavity of the mold;
A vision recognition system for photographing a change in oil level of the monomer solution injected into the cavity;
The oil level change image photographed by the vision recognition system is compared with the oil level change shape of the pre-stored monomer solution, and when the oil level change shape of the monomer solution to be injected coincides with the pre-stored oil level change shape, the injection amount of the monomer injector is gradually phased. Automatic injection device of a mold for an optical material comprising a; controller for adjusting to.
The method according to claim 8,
Further comprising a backlight installed on the back of the mold,
The vision recognition system is installed on the front of the mold to automatically mold injection of the monomer for the optical material, characterized in that the shadow of the two-dimensional shape formed by the surface of the monomer solution and the contour of the mold by the light irradiated from the backlight Device.
The method according to claim 8,
In the monomer oil level change shape stored in the controller in advance, a zone for changing the injection amount step by step is set at a plurality of points of the oil surface formed when the monomer solution is injected, and when the photographed oil surface reaches the zone, the controller may set the monomer. Automatic mold injection device of a monomer for an optical material, characterized in that for adjusting the injection amount of the injector to the next set step.
The method according to claim 10,
The monomer oil surface change shape stored in the controller in advance is a zone for changing the injection amount step by step at a plurality of points of the shoulder portion of the parabolic oil surface formed during the injection of the monomer solution is set automatically Infusion device.
The method according to claim 8,
The pair of molds are the outer one is sealed with an adhesive tape,
And a tape detacher for removing a portion of the adhesive tape from the mold to form a monomer injection hole and reattaching the adhesive tape removed after the injection of the monomer solution.
The method according to claim 12,
The tape detacher includes a gripper that operates to grasp and release one side of the adhesive tape and attach the tape back to its original state, and a servo motor for allowing the gripper to operate similar to the rotational operation of the wrist. Automatic mold injection device for monomer for optical materials.
The method according to claim 12,
The tape detacher may further include a roller for injecting a monomer for an optical material, characterized in that it further comprises a roller for close contact with the mold when the adhesive tape is reattached.
The method according to claim 8,
The mold supplied to the monomer injector is an automatic mold injection device of a monomer for an optical material, characterized in that the supply is supplied individually by a conveyor or a plurality are loaded in a tray.

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