JPS59203732A - Process and device for forming lens - Google Patents

Abstract

PURPOSE:To prepare a lens of high quality economically by treating a material for forming lens successively by several stages consisting of a stage for smoothening the surface of the material to be pressed, a stage for softening by heating, a stage for transporting the material to a space between a cope and a drag, and a stage for press-molding. CONSTITUTION:(i) The surface to be pressed of a material 13 for a lens is smoothened, then, (ii) the material is softened to ca. 10<7>-10<5.5> poise in a heating furnace 18, laid on a bench 22, and transported to a forming apparatus 17. (iii) The material 13 is then pushed up by a pushing rod 26 to the level of holding members 34, 34. The material 13 is held by the projected part 35 of the holding members by closing the holding members, and transported to a press-molding part 19 together with the holding members. (iv) The material 13 is then press- molded by a cope 31 and a drag 32 (29 and 30 in the drawing are guides). (v) Finally, the material 13 is returned to the top of the bench 22, received by the pushing rod 26 by closing the holding members 34, 34, and moved downward until it is set on the bench 22; and then transported to a slow cooling furnace 21.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens molding method and a molding apparatus, and particularly to a lens molding method and a molding apparatus that can continuously mold lenses by pressing softened glass. This is the purpose.

The molding method for the above-mentioned lenses has conventionally been carried out as shown in FIG. Hereinafter, a conventional lens molding method and its problems will be explained using FIG.

First, we will explain the equipment for carrying out the method.
A rotary table 3ρ is arranged below the orifice 1, which is connected to a glass melting furnace (not shown), and is configured to be rotatably driven and stopped via the main shaft 2.

On this rotary table 3, there are 4 lower molds 4, 5, 6.7 for molding molten glass at four equal positions on the circumference.
Individually arranged. When the rotary table 3 is stopped, that is, before the start of lens molding, a foot is installed so that the opening 8 of the orifice 1 is located above the lower mold 4 (lower M on the left side in the figure). At a position above the lower mold 5 adjacent to the lower mold 4, there is a center f' for suppressing and forming the bath molten glass (softened glass) 9 in the lower mold 5 in cooperation with the lower mold 5. A plunger 10 is arranged to be able to slide vertically. The INI between the opening 8 of the orifice 1 and the lower die 4 located below the opening 8 has nine parts of the bath melt glass hanging down from the opening 8, which are configured to be able to open and close freely in order to cut with a droplet. A cutting method 11 is self-established. The front rotary table 3 is controlled so that it rotates 45 degrees at a time, stops, and then returns, and the lower die 4 rotates 45 degrees at a time, stops four times, and is restored to its original position. , one process is completed.

An explanation of how to mold a lens using the above-mentioned mounting part! A
Then, first, insert the bath glass 9 from the orifice 1 into the lower mold 4.
The molten glass is allowed to flow down inside the bath, and a suitable amount of the bath molten glass is cut through the cutting part 11 by 9 inches. Next, the rotary table 3 is rotated 45 degrees counterclockwise in the figure and then stopped, and the lower mold 4 with the molten glass 9 placed thereon is moved to a position directly below the plunger 10.

Then, in this state, the plunger 10'(!1' is moved downward, and the plunger 10 and the lower die 4 work together to press the bath molten glass 9, thereby performing press molding of the molten glass 9. In this case, the heat of the molten glass 9 is removed by the Pushinger 10.

After press molding, the plunger 10Y is moved upward, and then the rotary table 3 is rotated 45 degrees counterclockwise in the figure and stopped.

That is, the lower mold 4 stops at the position of the lower mold 6 in the figure. At this stop position, no work is done in 1b1,
Only the shape of the molded glass (molded lens) 9 is maintained.

Then, the lower mold 4 is stopped at a position where the rotary table 3 is further rotated by 45 degrees, that is, at the position of the lower mold 7 in the figure, and the molded lens 9 inside the lower mold 4 is pushed up from below to take out the molded lens 9. The lens molding process is completed.

The above-mentioned lens molding method is carried out using Tanishita molds 4, 5°b, and 7, respectively, so that the lenses are continuously molded.

The molded lens 9 taken out from the lower mold 4 is placed in a cold storage furnace (not shown), and is cooled to a high temperature while creating a warm gradient to prevent heat build-up.

However, the conventional lens molding method described above has certain problems as follows. That is, first of all, the softened glass must be heated to a temperature at which it becomes viscous and flowable in the lower mold, and for this purpose, the orifice 1,
Cutting method 11, lower mold 4. 5. 6. There has been a problem in that each member such as 7 and plunger 10 is likely to become attached to each other, and the lifespan of each of these members is shortened. As a result, the cost of the equipment has increased, and each member has to be replaced frequently, which requires a large amount of time. Second, there is a problem in that it is difficult to uniformly remove heat from the molten glass 9 during molding, and therefore sink marks are likely to occur. Furthermore, it is difficult to maintain the plunger 10 at a molding temperature (temperature suitable for molding).
A device for cooling the U is required, which has the disadvantage of complicating the device. Thirdly, when taking out the lens 9 after molding, the molded lens 9 was pushed up from below to release it from the mold, so the curvature portion of the molded lens 90 is easily damaged during this operation, which reduces the quality of the molded lens 9. It was the cause.

The present invention has been made in view of the problems of the prior art described above, and includes a step of smoothing the press surface of a lens material for molding in advance.

heating the processed lens material until it reaches a predetermined viscosity; transporting the lens material softened to the predetermined viscosity between an upper mold and a lower mold; By providing a lens molding method consisting of a step of press molding, the various problems encountered in the above-mentioned prior art are solved. An evaluation and explanation will be given of the case of actually forming an IJ lens using the lens molding apparatus shown in the drawings.

The present invention involves the process of smoothing the press surface of a lens material for molding in advance, and the process of smoothing the lens material after Ail processing.
a step of heating until a constant viscosity and reaction pressure is achieved, and a step of transporting the lens material, which has been made even to the point where the viscosity drops, between an upper mold and a lower mold;
The lens is molded by the step of press-molding the lens material with the upper and lower molds, and the Tanikoki will be explained directly below.

First, the process of smoothly processing a lens thread material for molding into a press will be described with reference to FIG. 2. That is, the second
The figure shows Tawara's glass blank (lens material) 1:l' evenly attached to the lower part of the holder 12, and the glass blank (lens material) 1:l' smoothly ψ
[This is a polishing device yi shown in the figure. As shown in the figure, the flat lapping plate 15 that rotates and the holder 12 that is caused to make an oscar movement by the kanzashi 16 work together to polish the pressed surface (the lower surface in the figure) of the glass blank 13. ) can be polished smoothly. The glass blanks 13 are made by blanking 4'jit from a rond material, and each glass blank 13 attached to the lower surface of the holder 12 is cut into a predetermined size. In addition, the polishing process of the press surface of the glass blank 13 does not require flatness, but only needs to be polished to a smooth surface.

Therefore, as long as it can be polished to a smooth surface, other means other than the above-mentioned method may be used.Next, the polished lens material 13 is heated until it reaches a predetermined viscosity. The process of doing this will be explained. As shown in FIG. 3, this step is carried out as one step in a series of molding devices 17 for compression molding the lens material 13, and the heating furnace 18 performs this step. This 7+11 thermal furnace 18 is opened at both ends and is formed in a so-called tunnel shape, and inside thereof there are two rail-shaped tubes for transporting the lens material 13 toward the press molding section 19.
A row of conveyors 20 pass through it. In the heating furnace 18, the temperature at the opening on the transfer starting end side of the lens material 13 is set to approximately 'PK temperature, and the temperature near the opening on the transfer starting end side of the lens material 13 in the heating furnace 18 is set to approximately Material 13
The temperature is controlled to a predetermined high temperature in order to suppress and soften the material. That is, for example, the lens material 13
If the material is original 8F'81 glass with a softening point of 480°C, it should be heated to 525°C by passing it through the heating furnace 18 and softened to a viscosity of 10' poise. It is set.

As above <7 JO heat, softened lens material 13 is
The material is transported between the upper mold and the lower mold for compression molding, and the transport process is as follows. That is, the conveyor 20 is set to be long enough to transfer the molded lens through the press molding section 19 into a slow cooling furnace 21 having the same structure as the heating furnace 18. On the top surface, mounting tables (carrying tables) 22 for placing the lens material 13 are fixed at appropriate intervals.
The lens material 13 placed on this mounting table 22 is placed in the heating furnace 1.
8 and is transferred toward the press molding section 19 517
It's m. The mounting table 22 is made of a flat plate and is formed into a square shape, with a mark (
, four holes 23 and 24 formed in two stages are provided.

The holes 23 and 24 on the upper side are formed to have a larger diameter, but the diameter of the hole 23 is set to be smaller than the outer diameter of the lens material 13. And this two-stage hole 2
On 3.24, as shown in Fig. 4, the lens material stage 25, which has a step similar to (maintains) the holes 23 and 240 steps hB, is mounted from the -F direction by a 1νξ loading means. has been done. This lens material stage 25 is conveyor 200
It is configured to be able to move upwardly via 26 protruding rods arranged at the central part in the direction of lifting, and during this upward movement, the lens material stage 25 and the protruding rods 26 are moved respectively. Overlapping and recessed magnets (electromagnets) 27° and 28 valves are fixedly connected to each other. The MU writing table 22 and the lens material stage 25 are made of glass and a material that is resistant to decomposition, such as BN (boron nitride). One side of the M-shaped protruding rod 26 (conveyor 2
An upper die 31 and a lower die 32 are disposed on the outer side of the upper die 31 and the lower die 32, which are configured to be freely movable within the upper die guide member 29 and the lower die guide member 30 by a hydraulic device (not shown). The upper and lower molds 31 and 32 constitute the suppression molding section 19. A gap 33 is provided between the upper die guide member 29 and the lower die guide member 3o, and a lens material holding member 34, 34 is provided in the gap 33 in a direction perpendicular to the conveying direction of the conveyor 20. It is freely movable. The lens material holding members 34, 34 are divided into parts so that the lens material 13, which has been moved upward via the protruding rod 26, can be held and fixed at the upwardly moved position. Clamping portion 34a.

At the bottom of 34a, there is a lens material 1 as shown in FIG.
Projections 35 and 35 are provided respectively so as to support the lower circumference of the lens material 13 when the lens material 3 is held between the lenses.

Further, the diameter dimension Dt (see FIG. 5) of the upper side hole of the holding part 34a, which is formed after holding and supporting the lens system material 13, is formed to be the same diameter as the hole diameter d1 of the upper mold guide member 29. The diameter of the lower hole formed by the lower protrusion 35 with a small diameter is the same as the hole diameter d1 of the lower mold guide member 30. Then, when the lens material 13 is fixedly supported through the lens material holding members 34 and 34 and placed between the upper mold 31 and the lower mold 32, what happens? The fine center of each hole formed in the A# member 34, 34 is made to coincide with the axis of the upper and lower guide members 29, 30. The holding part 34a of the lens industry material holding member 34.34 is made of a material that is difficult to separate from glass, such as BN, and is attached and fixed thereto, or it is made of a material that is not easily separated from glass, or is made of a narrow surface treatment such as carburization or ceramic coating of chromium oxide. You may. In addition, the inside of the room where the lens material 13 is pressed, the inside of the heating furnace 18, and the cold storage r21
The atmosphere ρ) is maintained inside by Nt glass.

The upper and lower molds 31.
The lens material 13 carried between the upper and lower molds 31.
32 for compression molding.

The lens suppressed by the upper and lower molds 31 and 32 is
It is held between the writing holding members 34 and 34', placed on the mounting table 22 of the conveyor 20, and transferred into the slow cooling furnace 21 where it is slowly cooled to room temperature. As shown in FIG. 3, the slow cooling furnace 21 is disposed opposite the heating furnace 18, and the temperature near the opening on the starting end of slow cooling of the lens after molding is maintained at a predetermined sieve temperature. Explain the action and effect. The cylindrical lens member 13 whose press surface has been smoothly polished in the first step is conveyed to the conveyor 2.
0 on the mounting table 22 and transferred into the heating furnace 18. The conveyor 20 is stopped when the lens material 13 that has passed through the heating furnace 18 and has been heated to a predetermined temperature reaches the sliding surface of the clamping members 34 and 340 (see FIG. 4). Then, as shown in FIG. 5, the protruding rod 26 moves upward and the material 1
3 is moved upward to the open position of the clamping members 34, 3.4, and then each clamping member 34, 34' is moved in the direction of the arrow to clamp the lens wood 13. Then, as shown in FIG. 6, the lentil material 13 is carried between the upper and lower molds 31 and 32 which are maintained at a temperature 200° C. lower than the temperature of the lens material 13 via the clamping members 34, 34, and each mold 31 .32, the lens material 13 is subjected to compression molding. The molding speed of each mold 31, 32 during this molding is approximately 250 mxl.

In order to overcome this molding process, if the push-in lid is set so that a fast gap is formed between the upper outer peripheral edge of the molded lens material 13 and the upper die 31, variations in the volume of the lens material 13 can be prevented. It will be absorbed, which is convenient.

After molding, the upper and lower molds 31 and 32 are restored to their original state W, and the lens 13a after molding is placed in the holding member 3 as shown in FIG.
4. Restore to the position shown in FIG. 5 via 34. Each clamp 534a'& in the clamp member 34.34
The aperture is closed and the molded lens 13a is placed on the upwardly moved lens stage 25. Thereafter, the lens 13a is lowered onto the conveyor 20 via the protruding rod 26, and the conveyor 20YON is moved to transfer the lens 13a into the lehr 21 for annealing. It is easy to take out the lens 13a after it has been slowly cooled.

According to the above lens molding method and apparatus of the present invention, it is only necessary to heat the lens material 13 to a temperature at which compression molding can be performed, and there is no need to heat it to a temperature at which it melts as in the prior art. Therefore, the upper and lower molds 31 and 32 are not oxidized and their lifespan can be extended. Furthermore, since the cooling range of the lens 13a becomes smaller, the occurrence of lens distortion, sink marks, etc. can be prevented compared to the prior art. In addition, since the upper and lower molds 31 and 32 and the lens element 3 come into contact only during compression molding (pressing), it is easy to control the temperature of the molds 31 and 32 at a constant level, and cooling of the lens material 13 during molding is facilitated. It has the advantage of being able to grow evenly. It also has the advantage that even if there is some volumetric error in the lens material 13, it can be absorbed. Furthermore, since the clamping members 34.34 are used to carry the lens material 13 between the molds 31.32 and adjust the mold, the molded lens 13aVcv! Since the mold can be released without adding , it is possible to improve the quality of the lens.

FIG. 9 shows another embodiment of the clamping member 34, in which holes 36 are evenly provided in the part to be adjusted in order to absorb variations in the size of the lens material 13. It is composed of

The clamping member 34 can absorb the deviation of the lens system material 130, and the convex portion on the outer periphery formed thereby can be used as a reference when assembling the frame.

FIG. 10 shows a third example of the hollow axis of the present invention, and shows an apparatus for carrying out a method for molding a convex lens. The molding process is similar to that of the first embodiment, but in this case, the lens material 13 is one that has been quantitatively ground into a spherical shape using a ball W or the like. Further, a lens material layering member 37 is used as a means for moving the lens material 13 upward, and a mounting table 38 having a recess 38a' is fixed to the upper part of the conveyor 20 for transporting the lens material 13. In addition, at the bottom of the clamping member 34.34,
As shown in FIG. 11, a pair of holding members 39 are provided.

The operation of forming a convex lens by the above device is almost the same as that of the first embodiment, but since the lens material 13 is spherical, its upward and downward movements are performed by a stratification system connected to a true pump (not shown). This is done via member 37. Other functions are the same as those in the first embodiment, so their explanation will be omitted.

In addition, in each of the above embodiments, the viscosity of the lens material 13 is 10
Although the viscosity is 6 poise, it is not limited to this, and if the temperature difference between the mold temperature and the lens material 13 is 50°C and the molding speed is slowed to about 100y/mm, it is possible to use a viscosity of 10'poise. be. In addition, the lower limit of viscosity is 13ρ for the lens material - 10 which does not cause deformation due to its own weight.
Poise up to Ll poise is possible. Therefore, the present invention can be applied as long as the viscosity of the lens material 13 is -DSIO' to lO1'-1 Boaz.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the conventional method, Fig. 2 is an explanatory diagram of the lens material polishing method, which is one of the steps in this process, and Fig. 3 is an illustration of the final device for carrying out this invention. 4 to 7 are explanatory diagrams showing the operating state of the present invention, FIG. 8 is a perspective view of the bag portion of the apparatus for implementing the present invention, and FIG. 9 is the main part shown in FIG. 8. FIG. 10 is an explanatory view showing the third embodiment of the invention, and FIG. 11 is a perspective view showing the second embodiment of the invention.
FIG. 2 is a perspective view of the main part of FIG. 12...Holder 13.e.Lens material 14...Abrasive 15...Flat lapping plate 16-@-kanzashi 18...φ heating furnace 1911...Press molding section 20...Conveyor 21...No. Annealing furnace 22.38...-Placement stand 23.24-...Hole 25...Lens material stage 26...Protruding rod 27.28...Magnet 29--Upper die guide member 30...Lower die guide Member 31...Upper die 32...Lower die 33φ...Gap portion 34...Lens material holding member 34aO/Holding portion 35...Protrusion 37...Lens leaf material layering member 39...Holding Parts Figure 3 Figure 4 - 6゛i 1 19\ Body 353.3535A1 Internal: +0 3,' Exhaust force j7 220 Figure 5 31 Figure 6 ↓ Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Procedural amendment (voluntary) Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case Patent Application No. 78082 of 1982, 2 Name of the invention Lens molding method and device 3, Person making the amendment Case Relationship with Patent Applicant Address: 2-43-2-4, Hatagaya, Shibuya-ku, Tokyo, Agent 6, "Claims and Detailed Description of the Invention" column 7 of the specification subject to amendment, Amendment Contents (1) The claims are amended as shown in the attached sheet. (2) The statement ``Prevents distortion 1'' on line 900, line 10 of the specification has been changed to ``Adjust the optical characteristics.'' (S3) “Lens portion (413
The description in J7 is "20 from the temperature.
The description of 0℃J old is corrected to ``100''Cyo from 7 grades. (5) On page 20 of the specification, lines 7-8, 1, the statement ``There is no possibility of oxidation'' has been changed to ``It is difficult to oxidize, so the J deficiency correction will be made.'' 8. List of attached documents (1) Attachment 1 Attached Paper 2, Claims (1) A step of smoothing the press surface of a lens material for molding in advance, a step of heating the lens material after the processing until it reaches a predetermined viscosity, and a step of softening it to the predetermined viscosity. A lens molding method comprising the steps of: transporting the lens material into a space between an upper mold and a lower mold; and press-molding the lens material with the upper and lower molds. (2) Smooth processing of the lens material for molding. The lens forming method according to claim 1, wherein processing is performed using a polishing device comprising a holder that adjusts a plurality of lens materials, a kanzashi that makes Oscar motion, and a flat lapping plate that rotates. (3 ) The lens molding method according to claim 1, wherein the step of smoothing the lens material for molding is performed by quantitatively polishing the lens material into a spherical shape by ball polishing. (4) The step of heating the lens material includes A method for forming a lens according to claim 1, in which the material -2= is softened to a viscosity of 107 to 105.5 poise while being continuously heated. (5)-1, Detachment only in the lateral direction A conveyance section consisting of a conhair system in which mounting tables with flexible lens material stages are arranged in rows at required intervals, and a heating section and a slow cooling atmosphere section of a required length between the conveyance section in the conveyance direction. a cooling section, a holding member that can be raised and lowered to hold the lens material stage of each mounting table of the conveyance section suspended between the heating section and the slow cooling section; The lens material installed in the lens material stacy L held on the upper side is carried between the -1 mold and the lower mold of the press molding section, and the molded lens after molding is molded by the mold and the lower mold. A holding section consisting of a pair of lens material holding members that is movable back and forth in a direction orthogonal to the conveying direction of the conveying section, which is carried out onto the lens material stage again, and a lens material carried in by this holding section are required. The upper mold is press-molded into the shape of
-1- A lens molding apparatus, characterized in that it is constructed from above a press molding section in which lower molds are vertically slidably disposed facing each other. 6. The lens molding apparatus according to claim 5, wherein each of the mounting tables and the lens material stage are made of a material such as boron nitride that does not easily wet with glass. 6. The lens molding apparatus according to claim 5, wherein the pair of lens material clamping members of the clamping section are provided with a protrusion that supports a lower peripheral surface of the lens material. Each of the clamping parts of the pair of lens material clamping members is made of a material that does not easily wet with glass, such as boron nitride, or is formed by surface treatment such as carburization or ceramic coating with chromium oxide. A lens molding apparatus according to claim 5, comprising: 4) The lens molding apparatus according to claim 5, wherein each of the holding parts of the pair of lens material holding members of the holding part is provided with a hole for absorbing variations in the amount of lens material. A conveyance section consisting of a conhair in which a mounting table having four parts for placing lens materials is arranged in rows at required intervals, and a heating and slow cooling atmosphere section of a required length between the conveyance section in the conveyance direction. and a slow cooling section, and each mounting table of the conveyance section which is stopped between the heating section and the slow cooling section. A lens material suction member that can be raised and lowered to return the lens to the mounting table, and a lens material +4 held on the upper side of the mounting table by this lens material +4 suction member are pressed into the "-" mold of the press molding section.
The molded lens, which has been molded by the upper mold and the lower mold, is conveyed between the lower molds and transported to a position where it can be sucked and held again by the lens material suction member. A clamping part consisting of a pair of lens material clamping members that can move back and forth in orthogonal directions, and a -1 mold and a lower mold for press-IF-forming the lens material carried into the required shape using this clamping part.
1- Installed in front facing each other so as to be able to slide downwards. -4- A lens molding device comprising: a press molding section; −5=

Claims (1)

[Scope of Claims] (1) A step of smoothing the pressed surface of a lens material for molding in advance, a step of heating the lens material after said processing until it reaches a predetermined viscosity, and a step of softening the lens material to the predetermined viscosity. A method for molding a lens, comprising a step of placing the material between an upper mold and a lower mold, and a step of compressing and molding the lens material using the upper and lower molds. (2) Front N [2 The smooth processing process of the lens material for molding is performed using a polishing device consisting of a holder to which the lens material is pasted, a kanzashi to make an oscar motion, and a flat lapping plate that rotates. Do 4! i: The method for molding the lens described in item 1 of the range of requirements. (3) The method for molding a lens according to claim 1, wherein the step of smoothing the lens composite material for anatomical molding is performed by polishing the lens material into a spherical shape by ball polishing. (4) The method for molding a lens according to claim 1, wherein in the heating step of the lens material, the lens material is continuously heated and softened to a viscosity of 10 7 to 1 O 1 l·6 boads. (5th evening) A conveyance section consisting of a conveyor that has a stage for lens material that can be freely retracted only in the upward direction and is arranged in rows at required intervals, and a required length of heating and slow cooling in the conveyance direction of this conveyance section. A heating section and a cold storage section constituting an atmosphere section, a holding member which can be raised and lowered to raise and hold the lens material stage of each mounting table of the transport section stopped between the heating section and the slow cooling section, and this holding member. The lens material placed on the lens material stage held on the upper side of the mounting table by a member is carried between the upper mold and the lower mold of the suppression molding section, and the lens material after molding is molded by the upper mold and the lower mold. A holding part consisting of a pair of lens material holding members whose front bodies are movable in a direction orthogonal to the conveyance direction of the conveyance unit, and the molded lens is conveyed onto the lens material stage again; A lens molding device comprising an upper mold for pressing and molding a lens material into a desired shape, and a suppression molding section in which a lower mold is vertically slidably disposed facing each other. (6 ) The lens molding apparatus according to claim 5, wherein the lens material stage of each of the mounting tables is provided with a magnet portion having a projection for engagement with the holding member. The lens forming apparatus according to claim 5, wherein the table and the lens material stage are made of a material having a flexible property such as boron nitride. The lens molding device according to claim 5, wherein the pair of lens material holding members are provided with a protruding portion that supports the lower peripheral surface of the lens material. (9) The pair of lens material holding members are removed. Each clamping part of the member is made of a glass material such as boron nitride, or is formed by surface treatment such as infiltration or ceramic coating with chromium oxide.
A lens molding device according to item 5 of the fi description. OQ The lens molding device according to claim 5, wherein each clamping part of the pair of lens material clamping members of the clamping part is provided with a hole for absorbing variations in the cover of the lens material. (11) A heating and cooling atmosphere section of the required length is provided between the conveyor section consisting of a conveyor in which a V having a recess for placing the lens material and placing tables are arranged in rows at required intervals, and the conveyance direction of this conveyance section. The heating section and the slow cooling section, and the conveying section that is stopped between the heating section and the slow cooling section, raise and hold the lens material on each mounting table at the position where it is carried into the suppression molding section, and the molding after molding is carried out. The lens material iron layer member that can be raised and lowered to return the lens to the mounting table, and the lens material held on the upper side of the mounting table by this lens material suction member are carried between the upper mold and the lower mold of the suppression molding section. The molded lens formed by the upper mold and the lower mold is carried out again to a position where the lens material iron layer member can hold the eyebrows in a direction perpendicular to the conveyance direction of the front nU2 conveyance section. A clamping part consisting of a pair of lens material clamping members that can move back and forth, and an upper mold and a lower mold that press and mold the lens material carried into the desired shape by the clamping part and are slidably opposed in the vertical direction. A lens molding device characterized by comprising a press molding section arranged in the form of a press molding section. IL.