JP3635672B2 - Lens molding apparatus and lens molding method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lens molding apparatus for forming a lens provided in, for example, a compact disk device, an optical disk device, a camera device (having a photosensitive film, an imaging tube, and a CCD image sensor as light receiving means) and the like. With regard to the lens molding method, in particular, the lens is molded by reducing the size, simplifying, and reducing the cost of the apparatus by heating the member using a halogen lamp and compressing the member using air pressure. The present invention relates to an apparatus and a lens molding method.
[0002]
[Prior art]
Nowadays, in compact disc player devices, optical video disc player devices, magneto-optical disc devices, etc., a laser beam from an optical pickup is irradiated onto an optical disc, and recorded data is reproduced (or recorded) based on the reflected light. To do.
[0003]
The optical pickup is provided with an aspherical lens for the purpose of reducing the weight and cost of the device.
[0004]
For portable video camera devices, a part or all of the lens group is made aspherical for the purpose of reducing the weight and cost of the equipment, thereby reducing the number of lenses and reducing the size and weight of the lens unit. I am trying.
[0005]
The aspherical lens is difficult to mass-produce because it uses a processing method by grinding and polishing.
For this reason, mass production has been realized using a processing method in which a glass material is heated and softened and then press-molded with a mold.
[0006]
As a conventional press apparatus for performing the above press molding, a hydraulic press apparatus combining a hydraulic source and a cylinder, and an electric press apparatus using a motor and a ball screw are known. Each of the press devices heats the glass material using a heater or heats the glass material using a high frequency from a high frequency generator to heat and soften the glass material, and uses the hydraulic source and cylinder or motor and ball screw to form a mold. According to the press molding.
[0007]
[Problems to be solved by the invention]
However, the hydraulic press device has a problem that the hydraulic pressure generating part is large and a control unit for controlling the position of a molding die related to press molding is required, resulting in a complicated structure and high cost. .
[0008]
In addition, the electric press device needs to increase the size of the motor and the ball screw, and also requires a control unit for controlling the position of a molding die related to press molding, resulting in a complicated structure and high cost. There was a problem.
[0009]
Moreover, each said press apparatus was made to heat the said glass raw material with a high frequency. The high-frequency generator has a complicated configuration and a large size, and also requires a high voltage. Further, when heating the glass material using the high frequency generator, it is necessary to configure a part or all of the mold with a metal body, and the members constituting the mold are limited, and rapid heating is performed. For this reason, there is a problem that a member having good heat conduction cannot be used.
[0010]
Further, when heating the glass material using the heater, there is a problem that the heating rate is slow and mass production of lenses is difficult, although it is advantageous in terms of cost compared to using the high frequency generator.
[0011]
The present invention has been made in view of the above-mentioned problems, and can rapidly heat a material for forming a lens to contribute to mass production, and a member having good heat conduction as a member constituting a mold. An object of the present invention is to provide a lens molding apparatus and a lens molding method that can be used, are small in size, simple in configuration, and can contribute to low cost.
[0012]
[Means for Solving the Problems]
The present invention provides a molding means for molding a lens material into a predetermined mold, a heating means for heating and softening the lens material, and a lens material softened by the heating means by pressurizing the molding means with air pressure. A lens molding apparatus having a pressurizing unit for molding, wherein the pressurizing unit includes a first pressurizing unit that pressurizes the molding unit by air pressure, and a support unit that supports the first pressurizing unit. The first pressurizing unit and the second pressurizing unit for moving the support means by air pressure are characterized in that the first pressurizing unit is moved by air pressure.
[0014]
The lens molding apparatus according to the present invention further includes a fixing unit that fixes the support unit, and applies the first pressure unit moved by the second pressure unit when molding the lens material. Fix in pressure position.
[0015]
The lens molding apparatus according to the present invention has a halogen lamp as the heating means.
[0016]
Next, according to the present invention, the lens material is accommodated in a molding unit that molds the lens material into a predetermined mold, the lens material accommodated in the molding unit is heated and softened by the heating unit, and the heating unit is operated by air pressure. A method of molding a lens, in which the molding means is pressurized and a lens material softened by the heating means is molded into a predetermined mold, wherein the second pressurizing part constituting the pressing means causes the second The first pressurizing unit constituting the pressurizing unit together with the pressurizing unit and the support unit supporting the first pressurizing unit are moved by using air pressure, and the first pressurizing unit causes the air pressure to be The lens material is molded into a predetermined mold by pressurizing the molding means.
[0018]
In the lens molding method according to the present invention, the first pressurizing unit moved by the second pressurizing unit is pressurized by fixing the supporting unit with a fixing unit when molding the lens material. The lens material is molded into a predetermined mold while being fixed in position.
[0019]
In the lens molding method according to the present invention, the lens material is softened using a halogen lamp as the heating means.
[0020]
[Action]
In the lens molding apparatus and the lens molding method according to the present invention, the lens material is accommodated in molding means for molding a lens material such as glass into a predetermined mold. Next, the lens material accommodated in the molding means is heated and softened by the heating means.
[0021]
Specifically, a halogen lamp is used as the heating means. This halogen lamp is, for example, a halogen lamp using a tungsten filament, and can be rapidly heated to a predetermined temperature using a simple control circuit. For this reason, the said lens raw material can be heated rapidly. Accordingly, the production speed can be increased to enable mass production. Further, as in the case of performing high-frequency heating as the heating means, the lens can be obtained through simplification of the configuration without the need for a high-voltage high-frequency generator and a complicated controller for controlling the high-frequency generator. The cost of the molding apparatus can be reduced. In addition, by using a halogen lamp as the heating means, it is possible to rapidly heat the lens material. Therefore, a material having good heat conduction can be used as a material constituting the molding means. The disadvantage that the material constituting the means is restricted can be solved.
[0022]
Next, when the lens material is heated and softened by the heating means, the molding means is pressurized by a pressure means using air pressure.
[0023]
Specifically, the pressurizing unit has a two-stage configuration of a first pressurizing unit that pressurizes the forming unit and a second pressurizing unit that moves the first pressurizing unit to a pressurizing position. ing.
[0024]
When the lens material is heated and softened by the heating unit, first, the second pressurizing unit moves the first pressurizing unit to the pressurizing position by air pressure.
Next, the first pressurizing unit pressurizes the forming unit with air pressure.
Thereby, the softened lens material is molded into a predetermined mold by the molding means.
[0025]
The air pressure can be controlled by a control circuit having a simple circuit configuration and can be finely adjusted. For this reason, since the control circuit can be simplified, it is possible to simplify the size and cost of the lens molding apparatus.
[0026]
Here, when the pressurizing force of the second pressurizing unit that moves the first pressurizing unit to the pressurizing position is lower than the pressurizing force of the first pressurizing unit that pressurizes the molding unit, The pressurizing force generated in the first pressurizing unit pushes up the second pressurizing unit, and the molding means cannot be pressurized appropriately, and there is a problem that hinders lens molding.
[0027]
Therefore, in the lens molding apparatus and the lens molding method according to the present invention, the first pressurizing unit moved by the second pressurizing unit is added by the pressurizing unit fixing unit when the lens material is molded. Fix in pressure position.
[0028]
Thereby, when the pressurizing force of the second pressurizing unit is lower than the pressurizing force of the first pressurizing unit, the second pressurizing unit is generated by the pressurizing force generated by the first pressurizing unit. Can be prevented from being pushed up, and the molding means can be pressed well to perform lens molding.
[0029]
【Example】
Hereinafter, preferred embodiments of a lens molding apparatus and a lens molding method according to the present invention will be described in detail with reference to the drawings.
[0030]
The lens molding apparatus and the lens molding method according to the present invention can be applied to a glass lens molding apparatus that forms a glass lens using a glass material as a lens material as shown in FIG.
[0031]
In FIG. 1, the glass lens molding apparatus according to the first embodiment of the present invention is a glass lens molding apparatus that press-molds the glass material with an upper mold 1 and a lower mold 2, and the lower mold 2 is It is fixed to the molding chamber base 20 via a mold heat insulation joint 3b. The molding chamber base 20 is fixed to the housing 51.
[0032]
The upper mold 1 is fixed to a press shaft 4 via an upper mold heat insulation joint 3 a, and the press shaft 4 is fixed to the lower surface of a press shaft support unit 5. Linear motion bearing portions 6a are provided at both ends of the press shaft support unit 5, and the linear motion bearing portions 6a are provided on the linear motion shaft 6b so as to slide along the linear motion shaft 6b. It has been.
[0033]
The upper surface of the press shaft support unit 5 is fixed to a press cylinder rod 8r via a universal joint 7. The press cylinder rod 8r is provided in a press cylinder 8 that pressurizes and depressurizes the press cylinder rod 8r by air pressure. It has been.
[0034]
The press cylinder 8 is fixed to the lower surface of the press cylinder support unit 9. Linear motion bearing portions 10 are provided at both ends of the press cylinder support unit 9, respectively. The linear motion bearing portions 10 are slid along the linear motion shaft 6b. Is provided. Further, one end of the press cylinder support unit 9 is in contact with a protruding pin 13 that is protruded by the lock cylinder 14 when the upper mold 1 is pressed against the lower mold 2 (when the glass material is molded), A fixing piece 9a for fixing the press cylinder 8 is provided.
[0035]
The upper surface of the press cylinder support unit 9 is fixed to a press unit moving cylinder rod 12r via a universal joint 11. The press unit moving cylinder rod 12 r is provided in the press unit moving cylinder 12, and the press unit moving cylinder 12 is fixed to the casing 51.
[0036]
In other words, the glass lens molding apparatus has a two-stage pressurization configuration in which the upper mold 1 is moved to the pressurization position by the press unit moving cylinder 12 and the upper mold 1 is pressurized by the press cylinder 8.
The press cylinder 8 and the press unit moving cylinder 12 are each provided with a small sliding resistance between the cylinder part and the rod part in order to enable low-speed operation.
[0037]
Next, the linear motion bearing portion 10 fixed to the other end of the press cylinder support unit 9 is fixed to the molding chamber cylinder 23. The molding chamber cylinder 23 has a molding chamber cylinder rod 23a, and the molding chamber cylinder rod 23a is provided in front of the linear motion bearing portion 6a so as to slide along the linear motion shaft 6b. Further, one of the linear motion bearing portions 22 is fixed to one of the linear motion bearing portions 22.
[0038]
As shown in FIG. 2, the linear motion bearing portions 22 are fixed to a molding chamber lower plate 17 provided so as to surround the upper mold 1 and the lower mold 2 and to be in contact with the molding chamber base 20 during lens molding. Has been. On the lower plate 17 of the molding chamber, a quartz tube 18 provided so as to surround the upper die 1 and the lower die 2 at the time of lens molding and a circular shape using, for example, a tungsten filament provided so as to surround the quartz tube 18. Halogen lamps 24a to 24d and a reflecting mirror 25, for example, plated with gold, are provided so as to surround the halogen lamps 24a to 24d. The quartz tube 18 and the reflection mirror 25 are provided with a molding chamber upper plate 16 so as to be supported by the ends of the quartz tube 18 and the reflection mirror 25.
[0039]
The molding chamber lower plate 17 comes into contact with the molding chamber base 20 during lens molding. For this reason, the molding chamber 15 is formed by the molding chamber lower plate 17, the molding chamber base 20, the quartz tube 18 and the molding chamber upper plate 16. At this time, the halogen lamps 24 a and 24 b are provided so as to surround the upper mold 1, and the halogen lamps 24 c and 24 d are provided so as to surround the lower mold 2.
[0040]
The molding chamber upper plate 16 is in contact with the press shaft 4 through an oil seal 19. For this reason, at the time of lens molding, the molding chamber 15 is blocked from the outside air by the oil seal 19.
[0041]
Next, the operation of the glass lens molding apparatus according to this embodiment will be described.
First, in FIG. 1, when the glass gob 101 is stored in the upper mold 1 and the lower mold 2, air is supplied to the molding chamber cylinder 23, and the molding chamber cylinder rod 23a is pushed down. As a result, the linear motion bearing portion 22 fixed to the molding chamber cylinder rod 23a is pushed down along the linear motion shaft 6b, and at the same time, the molding chamber lower plate 17, the halogen lamps 24a to 24d, and the quartz tube. 18, the heating unit comprising the reflection mirror 25 and the molding chamber lower plate 16 is pushed down.
[0042]
The heating unit is pushed down until the molding chamber lower plate 17 contacts the O-ring 21 of the molding chamber base 20 as shown in FIG.
[0043]
When the heating unit is pushed down until the molding chamber lower plate 17 comes into contact with the O-ring 21, the halogen lamps 24a and 24b are positioned so as to surround the upper mold 1 and the halogen lamps 24c and 24d. Is fixed at a position surrounding the lower mold 2 to form a molding chamber 15. As described above, the molding chamber upper plate 16 comes into contact with the press shaft 4 via the oil seal 19. For this reason, the molding chamber 15 is shut off from the outside air by the oil seal 19.
[0044]
In this state, an inert gas is injected into the molding chamber 15 to make the molding chamber 15 into a neutral atmosphere, and power is supplied to the halogen lamps 24a to 24d. Thereby, the light from the halogen lamps 24a to 24d is reflected on the quartz tube 18 and reflected by the reflection mirror 25, and is irradiated to the molds 1 and 2 and the glass gob 101 via the quartz tube 18. The molds 1 and 2 and the glass gob 101 are heated to a predetermined temperature. In addition, by making the inside of the molding chamber 15 into a neutral atmosphere, it is possible to prevent the upper mold 1 and the lower mold 2 from being oxidized due to a high temperature.
[0045]
Here, the internal temperature of the heating chamber formed by the upper mold 1 and the lower mold 2 is measured by a temperature measuring body 26 shown in FIG. The temperature measuring body 26 supplies temperature measurement data indicating the measured temperature inside the heating chamber to the temperature control circuit 27. The temperature control circuit 27 detects the current internal temperature of the heating chamber from the temperature measurement data, forms control data so as to maintain a predetermined temperature, and generates the control data in the power control circuit 28a in the power control unit 28. To supply.
[0046]
On the other hand, the current flowing through the halogen lamps 24a to 24d is detected by the current control circuit 28c. When the current control circuit 28c detects the current current value, the current control circuit 28c supplies the detected data to the power control circuit 28a.
[0047]
Based on the detection data and the control data, the power control circuit 28a supplies currents to the halogen lamps 24a and 24b and the halogen lamps 24c and 24d so that the current value that changes according to the temperature change is constant. Are controlled separately. Accordingly, the halogen lamps 24a to 24d can be stably driven, and the life of the halogen lamps 24a to 24d can be extended. Further, since the halogen lamps 24a and 24b and the halogen lamps 24c and 24d can be driven and controlled separately, the heating temperatures of the upper mold 1 and the lower mold 2 can be controlled separately.
[0048]
By using a halogen lamp as a means for heating the molds 1 and 2 and the glass gob 101, the molds 1 and 2 and the glass gob 101 are rapidly heated to a predetermined temperature using a control circuit having such a simple configuration. can do. For this reason, it is possible to increase the production speed and enable mass production of glass lenses. In addition, since the glass lens can be mass-produced, it is possible to contribute to the cost reduction of the glass lens itself.
[0049]
Further, as in the case of performing high-frequency heating as the heating means, the lens can be obtained through simplification of the configuration without the need for a high-voltage high-frequency generator and a complicated controller for controlling the high-frequency generator. The cost of the molding apparatus can be reduced.
[0050]
In addition, since the halogen lamp can enable rapid heating of the glass gob 101, a material having good heat conduction can be used as a material constituting each of the molds 1 and 2. The problem that the material constituting 2 is limited can be solved.
[0051]
Next, when the glass gob 101 is sufficiently heated and softened, the air in the molding chamber cylinder 23 is exhausted. Thereby, the molding chamber cylinder rod 23a is pushed upward, and at the same time, the heating unit is pushed up to an initial position (original position before heating).
[0052]
Next, when the heating unit returns to the initial position, air is supplied into the press unit moving cylinder 12. As a result, the press unit moving cylinder rod 12r is pushed down, and this pressure is transmitted to the press cylinder support unit 9 through the universal joint 11, and the press cylinder 8 is pressed through the press cylinder lot 8r and the universal joint 7. It is transmitted to the shaft support unit 5 and the upper mold 1 moves to the pressure position.
[0053]
Next, when the upper mold 1 moves to the pressurizing position, air is supplied into the lock cylinder 14 and the protrusion pin 13 normally stored in the lock cylinder 14 is protruded. The protruding pin 13 contacts the fixed piece 9 a of the press cylinder support unit 9. Thereby, the said upper mold | type 1 will be fixed in the said pressurization position.
[0054]
Next, when the upper mold 1 is moved to the pressurizing position, air is supplied into the press cylinder 8 and the press cylinder rod 8r is pushed down. The pressure applied by the press cylinder rod 8 r is transmitted to the upper mold 1 through the universal joint 7, the press shaft support unit 5, and the press shaft 4. As a result, the glass gob 101 is formed into a predetermined mold by the upper mold 1 and the lower mold 2 as shown in FIG.
[0055]
Here, if the pressing force of the press unit moving cylinder 12 is weaker than the pressing force generated in the press cylinder 8, the pressing unit moving cylinder rod 12r is pushed up by the pressing force generated in the press cylinder 8. The upper mold 1 and the lower mold 2 cannot be pressurized properly, and there is a risk of hindering lens molding.
[0056]
However, in the glass lens molding apparatus, the press cylinder support unit 9 is fixed by the projecting pin that is ejected at the time of pressurization, and therefore the press cylinder 8 against the pressurizing force of the press unit moving cylinder 12. Even when the applied pressure is strong, it is possible to prevent the press unit moving cylinder rod 12r from being pushed up. Therefore, the upper mold 1 and the lower mold 2 can be pressed well to perform lens molding.
[0057]
Next, when the upper mold 1 is pressed against the lower mold 2 to form a lens, the air in the press cylinder 8 is exhausted, the press cylinder rod 8r is returned to the pressurizing position, and the lock cylinder 14 The inside air is exhausted and the protruding pin 13 is housed in the lock cylinder 14, and the air in the press unit moving cylinder 12 is exhausted and the press unit moving cylinder rod 12r is moved to the initial position (the upper mold 1). To the original position before moving to the pressurizing position.
[0058]
Such air supply and exhaust of the cylinders 8 and 12 are controlled by an air pressure control circuit as shown in FIG.
In this pneumatic control circuit, the air pressure generated by the air pressure source 52 is switched between the air pressure supply ports of the cylinders 8 and 12 by the electromagnetic switching circuits 53a and 53b. For example, speed control units 8a to 8d and 12a to 12d using orifices are provided between the cylinders 8 and 12 and the electromagnetic switching circuits 53a and 53b, and air to the cylinders 8 and 12 is provided. Is controlled by the speed control units 8a, 12a and 8c, 12c, and the exhaust control of the air from the cylinders 8, 12 is performed by the speed control units 8b, 12b, 8d, 12d. Yes.
[0059]
Specifically, the speed control units 8a, 12a and 8c, 12c that perform the air supply control and the speed control units 8b, 12b, 8d, and 12d that perform the air exhaust control are used to face each other. It has become. For example, when the cylinder rods 8r and 12r are lowered, the supply amount of air from the air pressure source 12 is controlled by the speed control unit 8b, and this is supplied to the cylinders 8 and 12 via the speed control unit 8a. Supply. At the same time, the exhaust amount due to the lowering of the cylinder rods 8r and 12r is controlled by the speed control unit 8c and exhausted through the speed control unit 8d.
[0060]
As described above, the cylinder rods 8 and 12 are controlled by pressurizing and depressurizing the air pressure, so that it is possible to perform delicate pressurization control and low-speed driving to the upper mold 1 and the lower mold 2. (For example, smooth driving can be performed within a range of 0.1 mmsec to 50 mmsec.). For this reason, the glass gob 101 can be gradually pressed (elastically pressed) to form a glass lens, and distortion, cracking, and the like of the formed glass lens can be prevented.
[0061]
In addition, such a glass lens molding apparatus using air pressure can be controlled by a control circuit with a simple configuration as shown in FIG. 3 and can be simplified in size and configuration. Can do. For this reason, the cost reduction of the said glass lens shaping | molding apparatus can be achieved.
[0062]
In the above description of the embodiment, a glass material is used as the lens material, but this may be a so-called plastic.
Further, it goes without saying that the lens molding apparatus and the lens molding method can be applied to the formation of any lens such as a spherical lens and an aspheric lens.
[0063]
【The invention's effect】
In the lens molding apparatus and the lens molding method according to the present invention, the molding means is pressurized by air pressure, so that fine pressure control can be performed and a control circuit with a simple circuit configuration is used. Pressurization can be controlled. For this reason, since the control circuit can be simplified, it is possible to simplify the size and cost of the lens molding apparatus.
[0064]
In the lens molding apparatus and the lens molding method according to the present invention, the lens material is heated by using a halogen lamp as a heating unit, so that the lens material can be rapidly heated to a predetermined temperature. For this reason, the production speed can be increased to enable mass production. In addition, since the material can be rapidly heated, a material having good heat conduction can be used as the material constituting the molding unit, and the disadvantage that the material constituting the molding unit is limited can be solved. In addition, since the temperature control of the halogen lamp can be controlled by a simple control circuit, the cost of the lens molding apparatus can be reduced by simplifying the configuration of the control circuit.
[0065]
In the lens molding apparatus and the lens molding method according to the present invention, the first pressurizing unit moved by the second pressurizing unit is fixed by fixing the supporting unit with the fixing unit when molding the lens material. Since the pressure is fixed at the pressurizing position, when the pressurizing force of the second pressurizing unit is lower than the pressurizing force of the first pressurizing unit, the first pressurizing unit generates the first pressurizing unit. It is possible to prevent the second pressurizing means from being pushed up. For this reason, it is possible to perform lens molding by pressurizing the molding means well.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a configuration of a glass lens molding apparatus according to an embodiment to which a lens molding method of the present invention and a lens molding apparatus of the present invention are applied.
FIG. 2 is a view showing a heating state of a glass gob in the glass lens molding apparatus according to the embodiment.
FIG. 3 is a block diagram of an air pressure control circuit for controlling air pressure of the glass lens molding apparatus according to the embodiment.
FIG. 4 is a view showing a pressed state of an upper mold and a lower mold in the glass lens molding apparatus according to the embodiment.
FIG. 5 is a block diagram of a temperature control circuit that controls the temperature of a halogen lamp provided in the glass lens molding apparatus according to the embodiment.
[Explanation of symbols]
1 ... upper mold
2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower mold
3a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Upper heat insulation joint
3b ......... Lower insulation joint
4 ... Press shaft
5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Press shaft support unit
6a, 10 ... Linear motion bearing
6b ... Linear motion shaft
7, 11, ..... Universal joint
8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Press Cylinder
8r ・ ・ ・ ・ ・ ・ ・ ・ ・ Press Cylinder Rod
9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Press Cylinder Support Unit
9a ... fixed piece
12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Press unit moving cylinder
12r ・ ・ ・ ・ ・ ・ ・ ・ Press unit moving cylinder rod
8a, 12a, 8c, 12c ... exhaust throttle type speed control unit
8b, 12b, 8d, 12d ... Air supply throttle type speed control unit
13 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Extrusion pin
14 ......... Lock cylinder
15 ........... Molding room
16 ..... Upper plate in the molding chamber
17 ......... Lower plate of molding chamber
18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Quartz tube
19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Oil seal
20 ......... Molding chamber base
21 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ O-ring
22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Linear bearing
23 ... Molding chamber cylinder
23a ... Molding chamber cylinder rod
24a to 24d ... Halogen lamp
25 ..... Reflection mirror
26 ..... Temperature measuring body
27 ... Temperature control circuit
28 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Power Control Unit
28a ... Power control circuit
28b ..... current detection circuit
28c ・ ・ ・ ・ ・ ・ ・ ・ Current control circuit
51 ..... casing
52 ... Air pressure source
53a, 53b ... Electromagnetic switching circuit
101 ... Glass Gob

Claims (6)

Molding means for molding the lens material into a predetermined mold, heating means for heating and softening the lens material, and pressurizing the lens material softened by the heating means by pressurizing the molding means with air pressure A lens molding apparatus having means,
The pressurizing unit includes a first pressurizing unit that pressurizes the forming unit with air pressure, a support unit that supports the first pressurizing unit, and the first pressurizing unit and the support unit that support the first pressurizing unit. A lens molding apparatus comprising: a second pressure unit that is moved.   A fixing means for fixing the support means is provided, and the first pressurizing part moved by the second pressurizing part is fixed at a pressurizing position when the lens material is molded. 2. The lens molding apparatus according to 1.   3. A lens molding apparatus according to claim 1, wherein the heating means is a halogen lamp. The lens material is accommodated in a molding means for molding the lens material into a predetermined mold, the lens material accommodated in the molding means is heated and softened by the heating means, and the molding means is pressurized by air pressure by the heating means. A lens molding method for molding a lens material softened by the heating means into a predetermined mold,
The second pressurizing unit constituting the pressurizing unit includes a first pressurizing unit constituting the pressurizing unit together with the second pressurizing unit and a supporting unit supporting the first pressurizing unit. Move using air pressure,
A method for molding a lens, wherein the first pressurizing unit pressurizes the molding unit using air pressure to mold the lens material into a predetermined mold.   When the lens material is molded, the support means is fixed by a fixing means, so that the first pressure member moved by the second pressure member is fixed at a pressure position, and the lens material is fixed to a predetermined mold. The method for molding a lens according to claim 4, wherein the lens is molded into a shape.   6. The lens molding method according to claim 4, wherein the lens material is softened using a halogen lamp as the heating means.

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