JP4933247B2 - Glass lens molding apparatus and glass lens molding method - Google Patents

Description

  The present invention relates to a glass lens molding apparatus and a glass lens molding method for simultaneously molding a plurality of glass lenses by a plurality of mold modules in a hot press process.

As a glass lens molding device, a glass material is loaded into a cavity between a lower mold and an upper mold held in a sleeve of a mold, and the glass material is heated and softened in the cavity to press and press. Thus, an apparatus for forming a glass lens having a predetermined shape is generally known (see, for example, Patent Documents 1 and 2). Patent Document 1 also discloses a technique for simultaneously molding a plurality of glass lenses using a plurality of molds as a conventional example.
JP-A-5-24869 (FIG. 6) JP 2004-149410 A (paragraph numbers 45 and 46)

  Here, in the conventional glass lens molding apparatus described above, the glass material is usually supplied in a loaded state sandwiched between the lower mold and the upper mold of the mold. In this case, if the glass material is loaded at an inappropriate position near the periphery in the cavity of the lower mold, when the glass material softened by heating is pressed and pressed, a part of the glass material is placed around the cavity. The glass lens may protrude and cause molding defects.

  In particular, when a plurality of glass materials are simultaneously pressed and pressed with a plurality of molds, if some of the glass materials are loaded at inappropriate positions on the mold, the glass materials are excessively added. In addition to being crushed by pressure, there is a risk that insufficient pressure will occur in the glass material of other molds and molding defects will occur in many glass lenses.

  An object of the present invention is to provide a glass lens molding apparatus and a molding method capable of preventing glass lens molding defects caused by an inappropriate loading position of a substantially spherical glass material.

In order to solve this problem, a glass lens molding apparatus according to the present invention is for a hot press process in which a plurality of glass lenses are molded simultaneously from substantially spherical glass materials respectively loaded in cavities of a plurality of mold modules. a glass lens formed shape device having a heating press stage, each mold module, upper and lower molds that are held in the sleeve to be loaded into the plurality of cavities sandwich the glass material from above and below The plurality of cavities are formed in at least the lower mold, and the heating press stage is suitable for the position of the glass material loaded in the cavities of the respective mold modules before the heating press process. Re-loading means for correcting the position and reloading the substantially spherical glass material, said reloading means , Released once to glass material loaded into the plurality of cavities is sandwiched from above and below by upper and lower molds, said from the separation direction of the upper and lower mold of the mold module is relatively moved by sandwiching the plurality of glass material state At that time, each upper mold is brought into contact with the heating means and preheated, and after a predetermined time has elapsed, the upper and lower molds are moved back in the approaching direction, and the plurality of glass materials are reloaded at appropriate positions. It is characterized by being.

  In the glass lens molding apparatus of the present invention, the upper and lower molds of the respective mold modules are relatively moved in the separation direction by the reloading means before the heating press process, and the respective glass materials are released from the sandwiched state. Is placed in an appropriate position in the cavity of each lower mold by its own weight. Then, after the elapse of a predetermined time, the upper and lower molds are returned and moved in the approaching direction by the reloading means, whereby each glass material is reloaded at an appropriate position. In addition, since a plurality of glass lenses are simultaneously molded by the respective mold modules in this proper reloading state, it is possible to prevent a glass lens from being poorly molded due to an inappropriate loading position of each glass material.

On the other hand, the glass lens molding method according to the present invention is a glass lens molding method for molding a plurality of glass lenses by sandwiching a substantially spherical glass material between molding mold modules composed of upper and lower molds. in front, once to the upper and lower molds of a plurality of glass material loaded into the plurality of cavities is sandwiched from above and below, the plurality of glass material the upper and lower molds are relatively moved in the detaching direction of the mold module Release from the sandwiched state, at that time, each upper mold is brought into contact with the heating means and preheated, after a predetermined time has passed, the upper and lower molds are moved back in the approaching direction, and the plurality of glass materials are reloaded at appropriate positions, In this reloaded state, a plurality of glass lenses are molded simultaneously by each mold module.

  In the glass lens molding method of the present invention, since each glass material is released from the sandwiched state before the heating press step, each glass material is placed in an appropriate position in the cavity of each lower mold by its own weight. Then, after a predetermined time elapses, each glass material is reloaded to an appropriate position, and in this reloaded state, a plurality of glass lenses are simultaneously formed by each mold module, so that the glass caused by an inappropriate loading position of the glass material Lens molding defects are prevented.

  In the glass lens molding apparatus of the present invention, the reloading unit moves the upper molds of the molding mold modules upward relative to the lower molds to release the glass materials from the sandwiched state, and after a predetermined time has elapsed. Each upper mold can be returned and moved downward to reload each glass material at an appropriate position.

In the glass lens molding apparatus of the present invention, the heating press stage includes a single heater block that can pressurize simultaneously while heating each upper mold of each mold module. If the mold is configured to move upward to a position where it contacts the single heater block, each upper mold can be preheated by contacting the heater block before the heating press process. This is preferable because the heating time can be shortened. Further, in the glass lens molding apparatus of the present invention, the heating press stage includes a single heater block that can pressurize all of the mold modules while heating the upper molds. If each upper mold is configured to move upward to a position where it comes into contact with a single heater block, each upper mold can be preheated by contacting the heater block before the heating press process. It is preferable because the heating time in the pressing process can be shortened.
Also in the glass lens molding method of the present invention, in the glass lens molding method for molding a plurality of glass lenses by sandwiching a substantially spherical glass material in each mold module composed of upper and lower molds, in the first stage of the heating press step. Each upper mold of each mold module is moved upward with respect to each lower mold to release each glass material from the sandwiched state. At that time, each upper mold is brought into contact with the heater block and preheated for a predetermined time. After the elapse of time, each upper mold is moved back downward to reload each glass material to an appropriate position, and in this reloaded state, each mold module is simultaneously pressed by a single heater block to form a plurality of glass lenses. It is preferable to mold all at once.

In the glass lens molding apparatus of the present invention, the heating press stage includes a plurality of heater rods that can be individually pressurized while heating each upper mold of each mold module, and the reloading means includes the reloading unit. If each upper mold is configured to move upward to a position in contact with each heater rod, each upper mold can be brought into contact with each heater rod and preheated before the heating press step. This configuration is preferable because the heating time of the heating press process can be shortened and each upper mold can be appropriately pressed by each heater rod in the heating press process.
Also in the glass lens molding method of the present invention, each glass mold is released from the sandwiched state by moving each upper mold of each mold module upward with respect to each lower mold in the previous stage of the heating press process, Each upper mold can be preheated by contacting each of the plurality of heater rods. This method is preferable because it can shorten the pressurization time of the hot press process and can pressurize each upper mold appropriately.

  According to the glass lens forming apparatus according to the present invention, each glass material is released from the sandwiched state by the upper and lower molds in the previous stage of the heating press process, so that each glass material is placed in an appropriate position in the cavity of each lower mold by its own weight. It will fit. And since each glass material is formed in a state where each glass material is reloaded at an appropriate position by the upper and lower molds, a plurality of glass lenses are molded at the same time, thereby preventing a glass lens from being poorly formed due to an inappropriate loading position of the glass material. be able to.

  Similarly, according to the glass lens molding method according to the present invention, each glass material is released from the sandwiched state before the heating press process, so that each glass material is placed in an appropriate position in the cavity of each lower mold by its own weight. Then, after a predetermined time elapses, each glass material is reloaded to an appropriate position, and a plurality of glass lenses are molded at the same time in this reloaded state. Can be prevented.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a glass lens molding apparatus and a molding method according to the present invention will be described with reference to the drawings. In this description, the same or similar components may be denoted by the same reference numerals and redundant description may be omitted. Here, in the drawings to be referred to, FIG. 1 is a plan view schematically showing a work stage of a glass lens forming apparatus according to an embodiment, and FIG. 2 is a longitudinal sectional view showing the structure of the mold module shown in FIG. 3 is a plan view of a glass lens formed by the mold module shown in FIG. 2, FIG. 4 is an enlarged plan view showing the transport tray shown in FIG. 1, and FIG. 5 is a plan view of the transport tray shown in FIG. It is a longitudinal cross-sectional view.

  A glass lens molding apparatus according to an embodiment is a glass lens molding apparatus that molds a plurality of glass lenses simultaneously from glass materials respectively loaded in cavities of a plurality of mold modules. As shown in FIG. 1, this glass lens molding apparatus has, for example, four work stages in which a transport tray 2 on which eight mold modules 1 are placed in a horizontal row is sequentially transported by appropriate transport means, that is, A set stage S1, a heating press stage S2, a cooling stage S3, and an extraction stage S4 are provided.

  The set stage S1 is a stage for a setting process for loading glass materials into the respective mold modules 1 placed in a horizontal row on the transport tray 2, and the time required for this setting process is approximately 3 minutes. It is. Each mold module 1 is a small one having a diameter of about 10 mm and a height of about 20 mm, for example.

The heating press stage S2 is a stage for a heating press process in which the glass materials loaded in the respective mold modules 1 are heated and softened at the same time, and the glass material has a glass viscosity. Heat to a temperature of 10 ⁷ to 10 ¹² poise, for example about 600 ° C. The time required for this hot pressing process is approximately 4 minutes.

  The cooling stage S3 is a stage for a cooling process for cooling each glass lens molded in each mold module 1 on the transport tray 2. In this cooling step, the molded glass lens is cooled under pressure until it reaches a temperature below the glass transition point. The time required for this cooling step is approximately 2 minutes.

  The take-out stage S4 is a stage for the take-out process for taking out each glass lens cooled in each mold module 2 on the transport tray 1, and the time required for this take-out process is about 3 minutes.

  Here, as shown in FIG. 2, each mold module 1 includes a short cylindrical upper mold 1B and a lower mold 1C which are concentrically held by being slidably fitted to a cylindrical sleeve 1A. Have A flange portion 1D having a larger diameter than the sleeve 1A is formed at the upper end of the upper mold 1B. The flange portion 1D is formed so as to escape slightly away from the upper end surface of the sleeve 1A in a closed state where the lower surface of the upper mold 1B is in contact with the upper surface of the lower mold 1C.

  On the other hand, a flange portion 1E having substantially the same diameter as the sleeve 1A is formed at the lower end of the lower mold 1C. Then, on the upper surface of the lower mold 1C, a glass lens 3 as shown in FIG. 3, that is, a glass having a shape in which a pair of support protrusions 3B and 3B protrude in the diameter direction from the periphery of a circular single-sided convex lens 3A having a diameter of about 3 mm. A cavity 1F for molding the lens 3 is formed.

  As shown in FIG. 4, the transport tray 2 is formed in a long and narrow rectangular plate shape, and a total of eight circular recesses 2 </ b> A are formed in a horizontal row at predetermined intervals on the longitudinal center line. Yes. Each circular recess 2A is formed in a size that allows the flange portion 1E of the lower mold 1C of each mold module 1 described above to be fitted and placed at the same height.

  As an example of precisely forming the bottom height of each circular recess 2A of the transport tray 2 to the same height, the transport tray 2 has a circular hole 2B corresponding to each circular recess 2A as shown in FIG. The upper plate 2C is formed, and the lower plate 2D having a predetermined thickness and high flatness joined to the lower surface of the upper plate 2C.

  Here, in the heating press stage S2 of the glass lens molding apparatus, the upper molds 1B of the molding mold modules 1 placed in a horizontal row on the transport tray 2 are moved upward together with respect to the lower molds 1C. As shown in FIG. 6, a lift plate 4 is stacked on the transport tray 2 as a jig to be used.

  The lift plate 4 is formed in a substantially rectangular plate shape whose length is substantially the same as the length of the transport tray 2 and whose width is wider than the width of the transport tray 2. On the center line in the longitudinal direction of the lift plate 4, eight circular holes 4 </ b> A are formed at positions corresponding to the circular concave portions 2 </ b> A of the transport tray 2.

  As shown in FIG. 7, each circular hole 4A of the lift plate 4 is formed to be slightly larger than the outer diameter of each sleeve 1A of each mold module 1 placed on the transport tray 2, and each circular hole 4A. The inner circumference of the sleeve is not in contact with each sleeve 1A. Each circular hole 4A is formed to have a predetermined diameter smaller than the outer diameter of the flange portion 1D of each upper mold 1B, and a portion around each circular hole 4A is related to the flange portion 1D of each upper mold 1B. Is possible. Then, both end portions in the width direction of the lift plate 4 protrude from the both edges in the width direction of the transport tray 2 by a predetermined amount, and the engagement receiving portions 4B for the protrusions to move the lift plate 4 upward, 4B.

  On the other hand, as shown in FIGS. 8 and 9, a single lower heater for heating each lower mold 1 </ b> C of each mold module 1 placed on the transport tray 2 is provided on the heating press stage S <b> 2 of the glass lens molding apparatus. A block 5, a single upper heater block 6 that can pressurize downward simultaneously while heating each upper mold 1 </ b> B, and engagement receiving portions 4 </ b> B and 4 </ b> B of the lift plate 4 stacked on the transport tray 2 And a plurality of push rods 7 that can move the lift plate 4 upward.

  For example, two push rods 7 are arranged below one of the engagement receiving portions 4B at a predetermined interval so that the lift plate 4 moves up and down in a horizontal state, and the other engagement receiving portion 4B. Similarly, two lines are arranged below each other at a predetermined interval. Each push rod 7 can be moved up and down through the heating press stage S <b> 2 on which the lower heater block 5 is placed, and its lower end is fixed to the drive base 8, so that the drive base 8 can be lifted and lowered. It is configured to move up and down at the same time.

  With such a configuration, when the drive base 8 is lifted as shown in FIG. 10 and the distal end portion of each push rod 7 pushes up the engagement receiving portions 4B and 4B of the lift plate 4, the lift plate 4 is attached to each sleeve 1A. It smoothly moves upward without coming into contact with the outer periphery, and the portion around each circular hole 4A of the lift plate 4 pushes the flange portion 1D of each upper mold 1B upward. Then, the upper surface of each upper mold 1B is brought into contact with a single upper heater block 6.

  That is, in the glass lens molding apparatus of one embodiment, the upper side of each mold module 1 is provided by the drive base 8 provided on the heating press stage S2, the plurality of push rods 7 and the lift plate 4 stacked on the transport tray 2. Reloading means for moving the mold 1B upward relative to each lower mold 1C is configured.

  Next, a glass lens molding method using the glass lens molding device of one embodiment will be described. First, when the transport tray 2 is transported to the set stage S1 of the glass lens molding apparatus (see FIG. 1), the spherical glass material G is loaded into each mold module 1 placed on the transport tray 2. (See FIG. 11).

  That is, the upper mold 1B is extracted from the sleeve 1A of the mold module 1, the spherical glass material G is placed on the cavity 1F of the lower mold 1C, the upper mold 1B is fitted into the sleeve 1A, and the space between the lower surface and the cavity 1F. The glass material G is loaded by sandwiching the spherical glass material G between the two.

  The spherical glass material G is used because volume management is easy, and is precisely formed into a spherical shape with a very small diameter error, and the diameter is set to an appropriate dimension of about 2 mm, for example. Is set. Note that the glass material G is not limited to a spherical shape, and can be a glass material having an appropriate shape such as a pellet.

  Here, the spherical glass material G is usually sandwiched and loaded at an appropriate position in the central portion in the cavity 1F as shown in FIG. 11, but as shown in FIG. 12, it is placed in the peripheral portion in the cavity 1F. Sometimes it gets stuck in an inappropriate position.

  Here, if an inappropriate loading state of the glass material G as shown in FIG. 12 is left, when the glass material G is heated and softened simultaneously in the heating press stage S2, the glass material G becomes excessive. It may be crushed by being pressurized, or a part thereof may protrude around the cavity 1F due to softening. Therefore, in order to avoid such a situation, the reloading means reloads the glass material at an appropriate position in the previous stage of the heating press stage S2, as will be described later.

  When the setting process in the set stage S1 is completed, as shown in FIGS. 8 and 9, the mold modules 1 are transported together with the transport tray 2 onto the heating press stage S2. Then, in the preceding stage of the heating press step in the heating press stage S2, an operation for correcting and reloading all the spherical glass materials G loaded in the respective mold modules 1 to the appropriate positions shown in FIG. I do.

  That is, as shown in FIG. 10, the push rods 7 are lifted together with the drive base 8, and the engagement receiving portions 4 </ b> B and 4 </ b> B of the lift plate 4 are pushed up by the tip portions of the push rods 7 to raise the lift plate 4 upward. Move. Then, by pushing up the flange portion 1D of each upper mold 1B of each mold module 1 at the part around each circular hole 4A of the lift plate 4, the cavity 1F of each lower mold 1C and the lower surface of each upper mold 1B are pushed up. Each spherical glass material G sandwiched between and loaded is released from the sandwiched state to a free state. At that time, the upper surface of each upper mold 1B is brought into contact with the upper heater block 6 and preheated.

  Even if the spherical glass material G is sandwiched and loaded in an inappropriate position close to the periphery of the cavity 1F as shown in FIG. 12 by such reloading operation, the spherical glass material G Rolls into the cavity 1F due to its own weight, and eventually settles at an appropriate position in the center of the cavity 1F (see FIG. 13). As the time required for this, out of the time required for approximately 4 minutes of the hot press process, the time of about 2 minutes 30 seconds in the previous stage is assigned as the predetermined time.

  When the time of about 2 minutes 30 seconds before the heating press step has elapsed, as shown in FIG. 9, the push rods 7 are lowered together with the drive base 8 and the lift plate 4 is moved downward by its own weight. Then, each upper mold 1B of each mold module 1 is moved downward by its own weight to reload each spherical glass material G to an appropriate position as shown in FIG.

  Thereafter, within a time of about 1 minute 30 seconds after the heating press step, the single upper heater block 6 is lowered and brought into contact with the upper surface of each upper mold 1B of each mold module 1 as shown in FIG. Thus, each upper mold 1B is heated. At the same time, each lower mold 1C is heated via the transport tray 2 by the lower heater block 5, thereby heating and softening each glass material G in each mold module 1. At this time, since each upper mold 1B is preheated in advance in contact with the heater block 6 before the heating press step, each glass material G is appropriately heated in a short time and surely softens.

  In this way, each glass material G in each mold module 1 is appropriately softened, and each upper mold 1B is pressed toward the lower mold 1C by a single upper heater block 6 to thereby form each mold. Between the upper mold 1B and the lower mold 1C of the mold module 1, as shown in FIG. 15, glass lenses 3 having a regular shape without molding defects are respectively molded.

  Therefore, each mold module 1 is transported to the cooling stage S3 together with the transport tray 2 (see FIG. 1), and the regular-shaped glass lens 3 molded in each mold module 1 is cooled for a required time of about 2 minutes. Solidify.

  Thereafter, each mold module 1 is taken out together with the transport tray 2 and transported to the stage S4 (see FIG. 1), and the glass lens 3 solidified by cooling is taken out from each mold module 1 respectively. That is, the upper mold 1B is extracted from the sleeve 1A of each mold module 1, and the glass lens 3 solidified by cooling is extracted from the cavity 1F of the lower mold 1C.

  As explained above, according to the glass lens molding apparatus of one embodiment and the glass lens molding method using the glass lens molding apparatus, each glass material G is placed in the cavity 1F of the lower mold 1C in the previous stage of the heat press step in the heat press stage S2. Since the glass material G is once released from the sandwiched state by the lower surface of the upper mold 1B, each glass material G can be stored in an appropriate position in the cavity 1F of each lower mold 1C by its own weight. Then, after a predetermined time has elapsed, each glass material G is reloaded at an appropriate position between the cavity 1F of the lower mold 1C and the lower surface of the upper mold 1B, and a plurality of glass lenses 3 are simultaneously heated and pressed in this reloaded state. Since molding is performed, it is possible to prevent molding defects of the glass lens 3 due to an inappropriate loading position of the glass material G.

  The glass lens molding apparatus according to the present invention is not limited to the above-described embodiment. For example, the single upper heater block 6 mounted on the heating press stage S2 as shown in FIG. 8 may be changed to a plurality of heater rods 9 as shown in FIG. Each heater rod 9 is disposed at a position where each upper mold 1B of each mold module 1 can be pressurized while being individually heated.

  In this case, as shown in FIG. 17, in the preceding stage of the heat press step in the heat press stage S2, the push rods 7 are lifted together with the drive base 8 to move the lift plate 4 upward, and the upper surface of each upper mold 1B. Is brought into contact with each heater rod 9 and preheated.

  Further, the plurality of push rods 7 shown in FIG. 9 and FIG. 10 as constituent members of the reloading means engage with the lower surfaces of the engagement receiving portions 4B and 4B of the lift plate 4 and lift them upward. It can be changed to (not shown).

  Furthermore, an appropriate cavity in place of the cavity 1F can be formed between the upper mold 1B and the lower mold 1C of the mold module 1 shown in FIG. For example, as shown in FIG. 18, a cavity 1F similar to the cavity 1F of the lower mold 1C may be formed on the lower surface of the upper mold 1B, and a double-sided convex lens may be formed between them. Further, as shown in FIG. 19, a convex spherical surface 1G is formed on the lower surface of the upper mold 1B, and a concave spherical surface for forming a concave lens between the upper surface of the lower mold 1C and the spherical protrusion 1G of the upper mold 1B. 1H may be formed as a cavity.

  On the other hand, the mold module 1 shown in FIG. 2 can be changed to a mold module 10 as shown in FIGS. The mold module 10 includes a disk-shaped sleeve 10A instead of the sleeve 1A shown in FIG. 2, and the upper mold 1B and the lower mold 1C are fitted into the disk-shaped sleeve 10A, respectively. Three sleeve holes 10B to be joined are formed in concentric circles at regular intervals.

  In this case, a disc-shaped lift plate 11 for moving the three upper molds 1B upward is overlaid on the sleeve 10A instead of the lift plate 4 shown in FIG. The lift plate 11 is formed larger in diameter than the sleeve 10A so that the outer peripheral portion can be engaged with an appropriate push rod or lift arm. In the lift plate 11, three circular holes 11A having a slightly larger inner diameter than the sleeve hole 10B are formed at positions overlapping the respective sleeve holes 10B of the sleeve 10A.

It is a top view which shows typically each operation | work stage of the glass lens shaping | molding apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the shaping | molding die module shown in FIG. It is the top view seen from the convex surface side of the glass lens shape | molded by the shaping | molding die module shown in FIG. It is a top view which expands and shows the conveyance tray shown in FIG. It is a longitudinal cross-sectional view of the conveyance tray shown in FIG. It is a top view of the lift plate piled up on the conveyance tray shown in FIG. FIG. 7 is an enlarged cross-sectional view of the lift plate shown in FIG. 6 together with the transport tray shown in FIG. 1. It is a front view of the heating press stage shown in FIG. It is a side view of the heat press stage shown in FIG. It is a side view of the heating press stage which shows the state which the push rod shown in FIG. 9 raised. FIG. 3 is a longitudinal sectional view of the mold module showing a state in which a glass material is loaded at an appropriate position in the mold module shown in FIG. 2. FIG. 3 is a longitudinal sectional view of the mold module showing a state in which a glass material is loaded at an inappropriate position in the mold module shown in FIG. 2. FIG. 13 is a longitudinal sectional view of the mold module showing a state where the glass material shown in FIG. 12 is housed in an appropriate loading position from an inappropriate loading position. FIG. 10 is a side view of a hot press stage showing a hot press state in which the push rod and the upper heater block shown in FIG. 9 are lowered. It is a longitudinal cross-sectional view of the mold module which shows the state by which the glass lens was shape | molded in the mold module shown in FIG. FIG. 9 is a front view of a heating press stage in which the single upper heater block shown in FIG. 8 is changed to a plurality of heater rods. It is a side view corresponding to FIG. 9 of the heating press stage with which the several heater rod shown in FIG. 16 is equipped. It is a longitudinal cross-sectional view of the shaping | molding die module which shows the modification which formed the cavity similar to the cavity of the lower mold shown in FIG. 2 in the upper mold. FIG. 5 is a longitudinal sectional view of a mold module showing a modification in which a convex spherical surface is formed on the upper mold shown in FIG. 2 and a concave spherical surface for forming a concave lens is formed between the convex spherical surface and the lower mold as a cavity. . It is a top view which shows the modification of the sleeve of the shaping | molding die module shown in FIG. It is the XX-XX sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold module 1A Sleeve 1B Upper mold 1C Lower mold 1D Cover part 1E Cover part 1F Cavity 2 Carry tray 2A Circular recessed part 3 Glass lens 3A Convex lens 3B Support protrusion 4 Lift plate 4A Circular hole 5 Lower heater block 6 Upper heater block 7 Push Rod 8 Drive base 9 Heater rod 10 Mold module

Claims (6)

A glass lens formed shapes device provided with a heat press stage for heat press step of forming the glass material substantially spherical shape loaded respectively into the cavities of a plurality of mold modules simultaneously a plurality of glass lenses,
Each mold module has upper and lower molds held in a sleeve so that the glass material is sandwiched from above and below to be loaded into the plurality of cavities, and at least the plurality of cavities are formed in the lower mold. And
The heating press stage includes reloading means for correcting the position of the glass material loaded in the cavity of each mold module to an appropriate position before the heating press process and reloading the substantially spherical glass material. Have
It said reloading means, once to the upper and lower molds of a glass material, loaded into the plurality of cavities is sandwiched from above and below, wherein the plurality of glass material the upper and lower molds are relatively moved in the detaching direction of the mold module In this case, each upper mold is brought into contact with the heating means and preheated, and after a predetermined time, the upper and lower molds are moved back in the approaching direction to reload the plurality of glass materials at appropriate positions. It is comprised so that the glass lens shaping | molding apparatus characterized by the above-mentioned.   The glass lens molding apparatus according to claim 1, wherein the heating unit is a single heater block that can pressurize all the upper molds of the respective mold modules while heating them.   The glass lens molding apparatus according to claim 1, wherein the heating means is a plurality of heater rods that can be individually pressurized while heating each upper mold of each mold module. In a glass lens molding method of molding a plurality of glass lenses by sandwiching a substantially spherical glass material in each mold module consisting of upper and lower molds,
In front of the heat press step, once the upper and lower molds relative to the vertical direction from the sandwich by a plurality of glass material loaded into the plurality of cavities, the plurality of the upper and lower molds are relatively moved in the detaching direction of the mold module The glass material is released from the sandwiched state. At that time, each upper mold is brought into contact with the heating means and preheated, and after a predetermined time has passed, the upper and lower molds are moved back in the approaching direction, and the plurality of glass materials are returned to their proper positions. A glass lens molding method comprising: loading and molding a plurality of glass lenses simultaneously by each mold module in the reloaded state.   The glass lens molding method according to claim 4, wherein the heating unit is a single heater block that can pressurize all the upper molds of the respective mold modules while heating them.   The glass lens molding method according to claim 4, wherein the heating means is a plurality of heater rods that can be individually pressurized while heating each upper mold of each mold module.

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