JP2014234320A - Manufacturing method of glass molded article, and manufacturing apparatus of glass molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a glass molded article and a manufacturing apparatus of a glass molded article that can mold an article of a complicated three-dimensional shape having a main plate part and a side plate part and make the article thin.SOLUTION: A manufacturing method of a glass molded article that manufactures a glass molded article having a main plate part and a side plate part includes: a step for arranging a first mold 61 having a first molding surface 61a and a second mold 62 having a second molding surface 62a and a recess part 65 oppositely to each other in the horizontal direction; a step for supplying a molten glass gob 10E so as to straddle the second molding surface 62a and the recess part 65 along the vertical direction into the clearance between the first mold 61 and the second mold 62; and a step for supplying the molten glass gob 10E into the recess part 65 by bringing the first mold 61 close to the second mold 62, and thus molding the front surface of the main plate part by the first mold 61, while molding the back surface of the main plate part and the front surface of the side plate part by the second mold 62.

Description

  The present invention relates to a glass molded product manufacturing method and a glass molded product manufacturing apparatus, and in particular, a glass molded product including a main plate portion and a side plate portion continuously provided from at least a part of an outer edge of the main plate portion by pressure molding. The present invention relates to a manufacturing method and a manufacturing apparatus for a glass molded product to be manufactured.

  As one of glass molded products, cover glasses provided in display devices typified by smartphones and tablet terminals are widely used. The cover glass is a portion that appears exposed on the outer surface of a display device or the like, and requires excellent design. As such a cover glass excellent in design, a cover glass having a complicated three-dimensional shape such as a substantially box shape composed of a main plate portion and a side plate portion connected to the outer edge thereof has been developed.

  Furthermore, as a condition for being excellent in design, it is required that the logo and the icon mark are integrally formed with the cover glass in addition to the cover glass having a complicated three-dimensional shape.

  The logo mark and the icon mark can be formed by grinding the main surface of a glass blank as a glass molded product. Since the pressed glass blank is polished and ground to obtain the specified surface accuracy, the manufacturing process is complicated if further grinding is performed to obtain the logo mark and icon mark. This leads to an increase in manufacturing cost. In particular, when a local convex shape is cut out, the grinding time is increased and the manufacturing cost is greatly increased.

  In order to avoid such complication of the manufacturing process and reduce the labor for polishing and grinding the glass blank, it is necessary to form the glass blank so as to have a product surface as a final product.

  Here, by using a direct press method in which molten glass is directly pressure-molded using a mold, polishing and grinding to obtain the above-mentioned predetermined surface accuracy are omitted, and the product surface as a final product. For example, Japanese Patent Application Laid-Open No. 2012-214361 (Patent Document 1) and Japanese Patent Application Laid-Open No. 3-228837 (Patent Document 2) disclose a method for producing a glass molded product capable of forming a glass molded product having a glass. .

  Patent Document 1 discloses a method for manufacturing a glass molded article having a complicated three-dimensional shape, and the manufacturing method is such that a concave first mold and a convex second mold are opposed to each other in the horizontal direction. A step of placing, a step of dropping a drop of molten glass lump between the first mold and the second mold disposed opposite to each other, and a first mold and a second mold of the dropped molten glass lump. And press-molding by sandwiching in the horizontal direction.

  Patent Document 2 discloses a method of manufacturing a glass optical component having a curved plate shape that is different from a box-shaped cover glass, and the manufacturing method includes a first mold that is disposed to face in the horizontal direction. Supplying a molten glass flow flowing out from the molten glass supply port along the vertical direction so as to straddle the molding surfaces of the first mold and the second mold in the gap between the second mold and the second mold; And a step of press-molding the molten glass flow sandwiched between the first mold and the second mold in the horizontal direction.

  By manufacturing a glass molded product through the above-described steps, in the glass molded product manufacturing method disclosed in Patent Document 1 and Patent Document 2, glass molding having a good surface accuracy of a mirror surface or a state close thereto. A product is obtained, and the surface of the glass molded product after pressure molding can be used as it is as the product surface of the final product without polishing the surface.

JP 2012-214361 A JP-A-3-228837

  In recent years, as a display device typified by a smartphone or a tablet terminal is made thinner, a cover glass having a complicated three-dimensional shape is also required to be made thinner.

  Here, in the manufacturing method described in Patent Document 1, transferability and releasability are provided on the inner peripheral surface of the concave portion of the first mold and the outer peripheral surface of the convex portion of the second mold for molding the side plate portion. Since it becomes easy to be damaged, it is difficult to bring the first mold and the second mold closer to each other in order to reduce the thickness.

  Moreover, in the manufacturing method described in Patent Document 2, it is not considered to manufacture a glass molded product having a complicated shape, and in particular, when manufacturing a glass molded product having a main plate portion and a side plate portion. However, no consideration is given to differences in transferability, releasability, and thermal shrinkage between the main plate portion and the side plate portion.

  The manufacturing method disclosed in Patent Document 2 is applied to the method for manufacturing a glass molded product disclosed in Patent Document 1, and molten glass is stretched along the vertical direction so as to straddle the molding surfaces of the first mold and the second mold. When supplying the flow, when the first mold and the second mold are brought close to each other, the bottom surface of the concave portion of the first mold for molding the main plate portion and the main surface of the convex portion of the second mold Molten glass first between the inner peripheral surface of the concave portion of the first mold and the outer peripheral surface of the convex portion of the second mold (the second cavity portion) for forming the side plate portion between the two (first cavity portion). The stream will be filled.

  When the molten glass flow comes into contact with the mold, heat is conducted from the molten glass to the mold, so that the molten glass flow filled in the second cavity portion is likely to be thermally contracted, thereby being easily cured.

  Therefore, if the first mold and the second mold are further brought closer to each other in order to reduce the thickness, the molten glass flow hardened in the second cavity part is broken, or the inner peripheral surface of the concave part of the first mold. As a result, transferability and releasability may be impaired on the outer peripheral surface of the convex portion of the second mold, resulting in a problem that the yield is greatly reduced or the manufacture itself cannot be performed.

  This invention is made | formed in view of the above problems, and the objective of this invention is the glass molded product which can be shape | molded into the complicated three-dimensional shape which has a main-plate part and a side-plate part, and can be reduced in thickness. It is providing the manufacturing method and the manufacturing apparatus of a glass molded product.

  The manufacturing method of the glass molded product based on this invention is a manufacturing method of the glass molded product which manufactures the glass molded product containing the main-plate part and the side-plate part connected from at least one part of the outer edge of the said main-plate part by pressure molding. is there. The method for producing a glass molded product according to the present invention includes a first mold including a first molding surface for molding the front surface of the main plate portion, and a first mold for forming the back surface of the main plate portion. (2) a step of horizontally disposing a second mold including a molding surface and a concave portion for forming the side plate portion, and a gap between the first mold and the second mold disposed opposite to each other Supplying the molten glass so as to move vertically downward, and the molten glass supplied to the gap between the first mold and the second mold, the first mold and the first And press-molding with two molds. In the state where the first mold and the second mold are arranged to face each other, the concave portion is arranged on at least one side of the pair of end portions of the second molding surface facing in the vertical direction. The two molding surfaces are provided adjacent to each other along the vertical direction. In the step of supplying the molten glass, the molten glass is supplied so as to straddle the second molding surface and the recess along the vertical direction. In the step of pressure-molding the molten glass, the molten glass that has been spread by bringing the first mold and the second mold close to each other is supplied into the recess, whereby the main plate portion The front surface is molded by the first mold, and the back surface of the main plate part and the surface of the side plate part are molded by the second mold.

  In the method for manufacturing a glass molded product according to the present invention, the second mold is configured such that the first mold and the second mold face each other when the first mold and the second mold are arranged to face each other. It is preferable to further include a projecting portion projecting toward the first mold side from the second molding surface on the side opposite to the side on which the two molding surfaces are located, and in the step of pressure molding the molten glass, It is preferable that the flow of the molten glass is regulated by the protrusion.

  In the method for manufacturing a glass molded product according to the present invention, in the state in which the first mold and the second mold are arranged to face each other among the surfaces of the second mold that defines the recess. It is preferable that the pair of inner side surfaces facing each other along the vertical direction are configured with inclined surfaces so that the outer shape of the concave portion decreases as the distance from the second molding surface increases.

  In the method for producing a glass molded product according to the present invention, an inclination angle of the inclined surface formed by the inclined surface and a normal direction of the second forming surface is 1 ° or more and 10 ° or less. preferable.

  In the method for producing a glass molded product according to the present invention, the glass molded product includes a planned product area including the main plate part and the side plate part, and a spare area positioned around the planned product area. It is preferable. In this case, it is preferable that the method for producing a glass molded product according to the present invention further includes a step of removing the preliminary region of the glass molded product after pressure molding.

  In the method for producing a glass molded product according to the present invention, in the step of pressure-molding the molten glass, the first region and the second region disposed close to each other correspond to the preliminary region. The first molten glass escape portion is preferably formed on the side opposite to the side where the second molding surface is located when viewed from the recess. In this case, it is preferable that the preliminary region is formed by the molten glass supplied to the first molten glass escape portion.

  In the manufacturing method of the glass molded product based on the said invention, it is preferable that a said 2nd metal mold | die further contains the 2nd molten glass escape part corresponding to the said reserve area | region in the part by the side of the bottom part of the said recessed part. In this case, it is preferable that the preliminary region is formed by the molten glass supplied to the second molten glass escape portion.

  An apparatus for producing a glass molded product according to the present invention is for producing a glass molded product including a main plate portion and a side plate portion continuously provided from at least one end side of the outer edge of the main plate portion by pressure molding. The apparatus for manufacturing a glass molded product according to the present invention includes a first mold and a second mold that are arranged to face each other in the horizontal direction, and the first mold and the second mold that are arranged to face each other. A molten glass supply unit that supplies molten glass so as to move along the vertical direction into the gap, a drive mechanism that relatively moves the first mold and the second mold, and controls the operation of the drive mechanism A control unit. The first mold includes a first molding surface for molding the front surface of the main plate portion, and the second mold includes a second molding surface for molding the back surface of the main plate portion. And a recess for forming the side plate portion. In the state where the first mold and the second mold are arranged to face each other, the concave portion is arranged on at least one side of the pair of end portions of the second molding surface facing in the vertical direction. The two molding surfaces are provided adjacent to each other along the vertical direction. The control unit includes the molten glass supplied so as to straddle the second molding surface and the concave portion along a vertical direction in a gap between the first mold and the second mold disposed to face each other. The molten glass is supplied into the recess by pushing the first mold and the second mold close to each other, whereby the front surface of the main plate portion is the first mold. The operation of the drive mechanism is controlled so that the back surface of the main plate portion and the surface of the side plate portion are formed by the second mold.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to shape | mold into the complicated three-dimensional shape which has a main-plate part and a side-plate part, the manufacturing method of a glass molded product and the manufacturing apparatus of a glass molded product which can be reduced in thickness can be provided.

It is a perspective view of the state which disassembled partially the display apparatus provided with the cover glass manufactured according to the manufacturing method of the glass molded product which concerns on Embodiment 1 of this invention. It is a schematic cross section along the II-II line of the display apparatus shown in FIG. It is the schematic which shows the structure of the manufacturing apparatus of the glass molded product which concerns on this Embodiment 1. FIG. It is a schematic cross section of the shaping | molding part shown in FIG. It is a top view which shows the molding surface side of the 1st metal mold | die shown in FIG. It is a top view which shows the molding surface side of the 2nd metal mold | die shown in FIG. It is a flowchart which shows the manufacturing method of the glass molded product which concerns on Embodiment 1 of this invention. It is a figure which shows the process of supplying the cut molten glass lump shown in FIG. 7 to the clearance gap between a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the 1st process of the process of press-molding the molten glass lump shown in FIG. 7 with a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the 2nd process of the process of press-molding the molten glass lump shown in FIG. 7 with a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the 3rd process of the process of press-molding the molten glass lump shown in FIG. 7 with a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the 4th process of the process of press-molding the molten glass lump shown in FIG. 7 with a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the process of cut | disconnecting and removing the unnecessary part of the released glass molding shown in FIG. It is a flowchart which shows the manufacturing method of the glass molded product which concerns on Embodiment 2 of this invention. It is a figure which shows the process of supplying the molten glass flow before a cutting | disconnection shown in FIG. 14 to the clearance gap between a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the process of cut | disconnecting a molten glass flow shown in FIG. It is a figure which shows the process of cut | disconnecting and removing the unnecessary part of the released glass molding shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below exemplifies a case where the present invention is applied to a manufacturing method and a manufacturing apparatus for a thin cover glass provided in a smartphone or a tablet terminal. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a perspective view of a state in which a display device including a cover glass manufactured according to the method for manufacturing a glass molded article according to Embodiment 1 of the present invention is partially disassembled. FIG. 2 is a schematic cross-sectional view taken along the line II-II of the display device shown in FIG. With reference to FIG. 1 and FIG. 2, the cover glass 10 manufactured according to the manufacturing method of the glass molded product which concerns on this Embodiment, and the display apparatus 100 provided with the same are demonstrated.

  As shown in FIG. 1, the display device 100 includes a cover glass 10, an exterior plate 20, a circuit board 30 disposed on the exterior plate 20, and a display 40 mounted on the circuit board 30. The surface of the display 40 constitutes an image display unit 42.

  The exterior plate 20 includes a substantially rectangular plate-shaped portion 21 and a pair of side wall portions 22 erected from a pair of end portions located on the long side of the plate-shaped portion 21.

  The cover glass 10 includes a substantially rectangular main plate portion 13 and a pair of side plate portions 15 provided continuously from a pair of end portions located on the short side of the main plate portion 13. Between the pair of side plate portions 15, an open space 18 is formed that communicates from one end portion on the long side of the main plate portion 13 to the other end portion. Thus, a pair of openings 19 connected to the open space 18 are formed on the long side of the cover glass 10.

  The cover glass 10 is attached to the exterior plate 20 (see arrow AR), and is arranged so as to cover the image display unit 42 of the display 40, so that the circuit board 30 and the display 40 are connected to the exterior plate 20. Seal between. At this time, the open space 18 is sealed by fitting the pair of side wall portions 22 of the exterior plate 20 into the pair of openings 19.

  Then, the detailed structure of the cover glass 10 is demonstrated. As shown in FIG. 2, the cover glass 10 has a main plate portion 13 and side plate portions 15. The cover glass 10 has a front surface 11 and a back surface 12, and the front surface 11 of the cover glass 10 includes a front surface 13 a of the main plate portion 13 and a front surface 15 a of the side plate portion 15. It is composed of Further, the back surface 12 of the cover glass 10 includes a back surface 13 b of the main plate portion 13 and a back surface 15 b of the side plate portion 15.

  In the display device 100, light L (see FIG. 2) including predetermined image information from the back surface 12 side located on the image display unit 42 side of the cover glass 10 toward the front surface 11 side is main plate unit 13. Transparent. Thereby, the various image information displayed on the image display part 42 is recognized by the user. When the front surface 11 of the cover glass 10 constitutes a touch panel display surface, the front surface 11 is pressed by a user's finger or a pen or the like.

  The cover glass 10 may be provided with an opening at a position corresponding to a speaker (not shown) mounted on the circuit board 30 and an operation button part (not shown) of the display device 100. In this case, the opening penetrates in the thickness direction from one main surface side of the cover glass 10 toward the other main surface side.

The cover glass 10 as described above has a glass composition of 50 wt% to 70 wt% SiO ₂ , 5 wt% to 15 wt% Al ₂ O ₃ , and 0 wt% to 5 wt%. B ₂ O ₃ , 5% by weight to 20% by weight Na ₂ O, 0% by weight to 10% by weight K ₂ O, 0% by weight to 10% by weight MgO, and 0% by weight or more 10% by weight or less of CaO, 0% by weight or more and 5% by weight or less of BaO, 0% by weight or more and 5% by weight or less of TiO ₂ , and 0% by weight or more and 15% by weight or less of ZrO ₂ Good.

  When the glass transition temperature is Tg, the glass having such a composition greatly affects the shape transferred to the glass by pressure molding (Tg-30) [° C.] or more (Tg + 150) [° C.] or less. In this temperature range, it is possible to maintain an appropriate glass viscosity, complete the surface transfer in a state in which good transferability is ensured, and suppress cracking due to thermal shrinkage of the glass.

The linear expansion coefficient α of the glass is 70 [× 10 ⁻⁷ / ° C.] or more and 110 [× 10 ⁻⁷ / ° C.] or less in a temperature range of (Tg−30) [° C.] to (Tg + 150) [° C.]. It is desirable. For example, a glass having a linear expansion coefficient α of 98 [× 10 ⁻⁷ / ° C.] in the range of 100 ° C. to 300 ° C. may be used. Further, when the glass viscosity is η [Pa · s], log η = 11.0 to 14.5 is desirable. Glass having the above characteristics is suitable for forming a cover glass having a curved shape.

  The cover glass 10 as described above is manufactured using a direct press method. FIG. 3 is a schematic diagram illustrating a configuration of a glass molded product manufacturing apparatus according to the first embodiment. With reference to FIG. 3, the manufacturing apparatus 50 of the glass molded product which concerns on Embodiment 1 is demonstrated.

  As shown in FIG. 3, the glass molded product manufacturing apparatus 50 mainly includes a molten glass supply unit 70, a cutting unit 80, a molding unit 60, and a control unit 90.

  The molten glass supply unit 70 is a part for melting the glass material and supplying the molten glass to the molding unit 60. The cutting unit 80 is a part for adjusting the amount of molten glass supplied from the molten glass supply unit 70 to the forming unit 60 to an appropriate amount. The molding unit 60 is a part for pressure-molding the supplied molten glass using a mold. The control unit 90 is a part for controlling the operations of the cutting unit 80 and the molding unit 60 described above.

  The molten glass supply unit 70 includes a continuous melting furnace 71, a nozzle unit 72, and an outflow pipe 73. The continuous melting furnace 71 melts a glass material and stores the molten glass, and the nozzle portion 72 introduces the molten glass stored in the continuous melting furnace 71 into the outflow pipe 73. The outflow pipe 73 has an outflow port 73a at its lower end, and continuously flows out the molten glass flow 10D from the outflow port 73a vertically downward.

  The cutting unit 80 includes a cutter 81 and a cutter driving mechanism 82 as a cutting mechanism. The cutter 81 cuts the molten glass flow 10D flowing out from the outflow pipe 73 and separates the cut portion from the molten glass flow 10D, and is driven by the cutter driving mechanism 82 described above. The cutter 81 is configured by a pair of flat plate-shaped shear blades, and the pair of shear blades are abutted below the outflow pipe 73 to cut the molten glass flow 10D. The cutter driving mechanism 82 receives a command from the control unit 90 and drives the cutter 81. As the cutter driving mechanism 82, various types can be used, but preferably an air cylinder, a servo motor, a hydraulic cylinder, a linear motor, a stepping motor, or the like can be used.

  The molding unit 60 includes a first mold 61, a second mold 62, a first mold drive mechanism 63, and a second mold drive mechanism 64. The 1st metal mold | die 61 and the 2nd metal mold | die 62 are a metal mold | die arrange | positioned facing in the horizontal direction in the press molding process mentioned later. The first mold 61 moves by being driven by the first mold driving mechanism 63 described above, and the second mold 62 is moved by being driven by the second mold driving mechanism 64 described above.

  Materials for forming the first mold 61 and the second mold 62 include heat-resistant alloys (stainless alloys, etc.), super steel materials mainly composed of tungsten carbide, and various ceramics (silicon carbide, silicon nitride, aluminum nitride, etc.). Further, it can be appropriately selected from known materials as a mold for producing a glass molded article such as a composite material containing carbon. The first mold 61 and the second mold 62 may be made of the same material, or may be made of different materials.

  The surfaces of the first mold 61 and the second mold 62 are preferably covered with a predetermined coating layer from the viewpoint of improving durability and preventing fusion with the molten glass. The material of the coating layer is not particularly limited. For example, various metals (chromium, aluminum, titanium, etc.), nitrides (chromium nitride, aluminum nitride, titanium nitride, boron nitride, etc.), oxides (chromium oxide) , Aluminum oxide, titanium oxide, etc.) can be used. The method for forming the coating layer is not particularly limited, and for example, a vacuum deposition method, a sputtering method, a CVD method, or the like can be used.

  The 1st metal mold | die 61 and the 2nd metal mold | die 62 are comprised so that it can heat to predetermined temperature with the heating means which is not shown in figure. The heating means is not particularly limited, but a known heating means can be appropriately selected and used. For example, a cartridge heater that is used by being embedded inside the member to be heated, a sheet heater that is used while being in contact with the outside of the member to be heated, an infrared heating device, a high-frequency induction heating device, or the like can be used as the heating means.

  The first mold driving mechanism 63 is driven in response to a command from the control unit 90, thereby moving the first mold 61 in the DR1 direction (horizontal direction) indicated by an arrow in FIG. The second mold drive mechanism 64 is driven in response to a command from the control unit 90, thereby moving the second mold 62 in the DR2 direction (horizontal direction) indicated by an arrow in FIG. Various types can be used as the first mold driving mechanism 63 and the second mold driving mechanism 64, but preferably a servo motor, an air cylinder, a hydraulic cylinder, a linear motor, a stepping motor, or a combination thereof. Is available.

  As a mode for controlling the first mold driving mechanism 63 and the second mold driving mechanism 64 by the control unit 90, a mode for controlling the positions of the first mold 61 and the second mold 62 (position control mode), There is a mode (load control mode) for controlling the load relatively loaded on the first mold 61 and the second mold 62, and it is preferable that these two control modes are switchable. The first mold driving mechanism 63 and the second mold driving mechanism 64 can press-mold molten glass with a maximum pressing force of 3 tons using the first mold 61 and the second mold 62. It is preferable that it is comprised.

  The control unit 90 controls the operations of the cutter driving mechanism 82, the first mold driving mechanism 63, and the second mold driving mechanism 64 described above. That is, the control unit 90 manufactures a cover glass as a glass molded product such as the timing of cutting the molten glass flow 10D by the cutter 81, the timing of movement of the first mold 61, and the timing of movement of the second mold 62. A series of such sequences is controlled.

  FIG. 4 is a schematic cross-sectional view of the forming portion shown in FIG. FIG. 5 is a plan view showing the molding surface side of the first mold shown in FIG. 4. FIG. 6 is a plan view showing a molding surface side of the second mold shown in FIG. The first mold 61 and the second mold 62 will be described with reference to FIGS.

  As shown in FIGS. 4 and 5, the first mold 61 includes a first molding surface 61 a for molding the front surface 13 a of the main plate portion 13 and a mold surface 61 b located around the first molding surface 61 a. The first molding surface 61a has a shape corresponding to the front surface 13a of the main plate portion 13, and has a substantially rectangular shape.

  As shown in FIGS. 4 and 6, the second mold 62 includes a second molding surface 62 a for molding the back surface 13 b of the main plate portion 13, a recess 65 and a protrusion 621 for molding the side plate portion 15. Including. The second mold 62 has a shape corresponding to the back surface 13b of the main plate portion 13 and has a substantially rectangular shape.

  In the state where the first mold 61 and the second mold 62 are arranged to face each other, the concave portion 65 is perpendicular to the second molding surface on the pair of end portions of the second molding surface 62a facing along the vertical direction. Adjacent to each other along the direction.

  The recess 65 is defined by the surface of the second mold 62. In consideration of releasability in the manufacturing process of the glass molded product to be described later, in the state where the first mold 61 and the second mold 62 are arranged to face each other among the surfaces of the second mold defining the recess 65. The pair of inner side surfaces 65a and 65b facing each other along the vertical direction are preferably configured with inclined surfaces so that the outer shape of the concave portion 65 becomes smaller as the distance from the second molding surface 62a increases.

  In this case, the inclination angle of the inclined surface formed by the inclined surface and the normal line of the second molding surface 62a is preferably 1 ° or more and 10 ° or less. When the inclination angle is smaller than 1 °, the second mold 62 and the glass molded product after pressure molding come into contact with each other and cracks occur when the second mold 62 is released in the manufacturing process. There is a case. Further, when the tilt angle is larger than 10 °, excellent design properties cannot be obtained.

  In the state where the first mold 61 and the second mold 62 are arranged to face each other, the protruding portion 621 is located on the opposite side of the second molding surface 62a from the side where the second molding surface 62a is located when viewed from the recess 65. Also protrudes toward the first mold 61 side. The protrusion 621 regulates the flow of the molten glass in a glass molded product manufacturing process described later.

  As shown in FIG. 4, when the first mold 61 and the second mold 62 are brought close to each other, the first molding surface 61a of the first mold 61 and the second molding surface of the second mold 62 are mainly used. Defines the first cavity portion 66, the mold surface 61 b of the first mold and the protrusion 621 define the first molten glass escape portion 67, and the recess 65 defines the second cavity portion 68 and the second molten glass escape portion 69. Is defined.

  The first molten glass escape portion 67 is located on the side opposite to the side where the second molding surface 62a is located when viewed from the concave portion 65 in a state where the first mold 61 and the second mold 62 are arranged to face each other. The second molten glass escape portion 69 is located at the bottom side portion of the recess 65.

  The first cavity portion 66 is a region corresponding to the main plate portion 13 of the glass molded product, and the second cavity portion 68 is a region corresponding to the side plate portion 15 of the glass molded product. On the other hand, the 1st molten glass escape part 67 and the 2nd molten glass escape part 69 function as a part which escapes the excessively supplied molten glass in the manufacturing process of the glass molded product mentioned later, and the spare area | region of the glass molded product mentioned later A portion corresponding to is formed.

  The method for manufacturing a glass molded product according to the present embodiment pressurizes a molten glass lump that is cut from a molten glass flow and falls downward vertically using a pair of molds arranged to face each other in the horizontal direction. The manufacturing example in the case of manufacturing a cover glass by shape | molding and cutting and removing an unnecessary part, without grind-finishing the glass molded product after pressure forming is shown.

  FIG. 7 is a flowchart showing a method for manufacturing a glass molded product according to the present embodiment. 8 to 13 are diagrams showing a predetermined step and a state after the predetermined step in the flow shown in FIG. With reference to FIGS. 7 to 13, a method for manufacturing a glass molded product according to the present embodiment will be described.

  As shown in FIG. 7, first, in the step (S11), the first mold and the second mold are arranged to face each other. Specifically, the first mold 61 and the second mold 62 are such that the first molding surface 61a and the second molding surface 62a face each other through a position below the outflow pipe 73 (see FIG. 3). In such a manner, they are arranged at predetermined initial positions P11 and P21 (see FIG. 8).

  At this time, the first mold 61 and the second mold 62 are arranged so that the first molding surface 61a and the second molding surface 62a are orthogonal to the horizontal plane, and thereby the first mold 61 and the second mold 62 are arranged. Are opposed to each other along the horizontal direction. The first mold 61 and the second mold 62 are moved to the initial positions P11 and P12 by the controller 90 driving the first mold drive mechanism 63 and the second mold drive mechanism 64. .

  In a state where the first mold 61 and the second mold 62 are disposed to face each other in the horizontal direction, the first mold 61 and the second mold 62 are each heated to a predetermined temperature. The predetermined temperature may be a temperature at which a good transfer surface can be formed on a glass molded product.

  In general, if the temperature of the forming portion 60 is too low, it becomes difficult to form a highly accurate transfer surface. On the other hand, if the temperature is too high than necessary, there is a concern that fusion with the glass tends to occur or the life of the molded part 60 is shortened. Usually, it sets to the temperature of the range of (Tg-100) degreeC or more and (Tg + 100) degreeC or less with respect to the glass transition temperature Tg of the glass to pressure-mold. Actually, an appropriate temperature is determined in consideration of various conditions such as the type of glass, the shape and size of the glass molded product, the material of the molded part 60, and the type of protective film. The heating temperature of the first mold 61 and the second mold 62 may be the same temperature or different temperatures.

  In the present embodiment, the molding unit 60 is heated to a predetermined temperature, and then a high-temperature molten glass in a melted state is supplied and subjected to pressure molding, so that the temperature of the molding unit 60 is kept constant. These steps can be performed. Furthermore, it is possible to repeatedly manufacture a plurality of glass molded products while keeping the temperature of the molding unit 60 constant. Therefore, since it is not necessary to repeat the temperature rise and cooling of the molding unit 60 every time one glass molded product is manufactured, the glass molded product can be manufactured efficiently in an extremely short time.

  Here, keeping the temperature of the molding part 60 constant means that the target set temperature in the temperature control for heating the molding part 60 is kept constant. Therefore, it is not intended to prevent the temperature fluctuation of the molded part 60 due to contact with the molten glass or the like during execution of each process, and such temperature fluctuation is allowed.

  Subsequently, as shown in FIG. 7, in the step (S12), the cut molten glass lump is supplied between the first mold and the second mold. FIG. 8 is a diagram illustrating a process of supplying the cut molten glass lump shown in FIG. 7 to the gap between the first mold and the second mold.

  As shown in FIG. 8, in the step of supplying the cut molten glass lump 10 </ b> E, a vertical direction is provided in the gap between the first mold 61 and the second mold 62 disposed at the initial positions P <b> 11 and P <b> 21. The molten glass lump 10E is supplied so as to straddle the second molding surface 62a and the recessed portion 65 along the direction. In the molten glass lump 10E having such a length, as shown in FIG. 3, the length of the molten glass flow 10D flowing out vertically from the outlet 73a of the outlet pipe 73 reaches a predetermined length. At that time, it is obtained by cutting with the cutter 81.

  Specifically, the molten glass flow 10D is cut at the timing when the sensor detects the tip of the molten glass flow, or is cut according to the flow rate or outflow time of the molten glass flow calculated in advance by experiments or the like.

  Thereby, the molten glass lump 10E separated from the molten glass flow 10D falls downward in the vertical direction. The molten glass flow 10D is performed by the control unit 90 moving the cutter 81 toward the molten glass flow 10D using the cutter driving mechanism 82. After the cutting is completed, the cutter 81 is moved in the reverse direction. Return to the original position when moved.

  Next, as shown in FIG. 7, in a step (S13), the molten glass lump is pressure-molded with the first mold and the second mold. FIG. 9 to FIG. 12 are views showing the first to fourth steps of the step of press-molding the molten glass lump with the first mold and the second mold shown in FIG.

  As shown in FIG. 9, in the first step of press molding the molten glass lump with the first mold and the second mold, first, at the timing when the molten glass lump 10E has dropped in the vertical direction, The first mold 61 and the second mold 62 are moved in the horizontal direction (arrow A1 direction and arrow B1 direction) so that the first molding surface 61a and the second molding surface 62a approach each other.

  Also, the first mold 61 is in a state where the tip of the molten glass lump 10E is located below the lower recess 65 and the rear end of the molten glass lump 10E is located above the upper recess 65. The first mold and the second mold are moved so that the second mold 62 contacts the molten glass lump 10E.

  Subsequently, as shown in FIG. 10, in the second step of press molding the molten glass lump with the first die and the second die, the first die 61 and the second die 62 are The molten glass lump 10E is contacted almost simultaneously and sandwiched.

  At this time, in the first mold 61, the molten glass lump 10E contacts the mold surface 61b and the first molding surface 61a from the upper end side to the lower end side. In the second mold 62, the molten glass lump 10 </ b> E contacts the surface facing the first mold 61 and the second molding surface 62 a out of the surface of the protrusion 621 from the upper end side to the lower end side.

  Thereby, the molten glass lump 10E comes into contact with the first mold 61 and the second mold 62 while maintaining a substantially constant thickness from the upper end side to the lower end side. Here, the thickness direction of the molten glass lump 10E refers to the horizontal direction.

  Next, as shown in FIG. 11, in the third step of press molding the molten glass lump with the first mold and the second mold, the first molding surface 61a and the second molding surface 62a The first mold 61 and the second mold 62 are moved in the horizontal direction (arrow A1 direction and arrow B1 direction) so that.

  By this movement, the molten glass lump 10E is along a direction parallel to the first molding surface 61a and the second molding surface 62a by the first molding surface 61a of the first mold 61 and the second molding surface 62a of the second mold 62. Thus, the molten glass lump 10E is expanded.

  At this time, since the thickness of the molten glass lump 10E contacting the first mold 61 and the second mold 62 is substantially constant as described above, the molten glass lump 10E has the first molding surface 61a and the second molding surface. It will be spread evenly and uniformly in the direction parallel to 62a.

  Thereby, it can suppress that the molten glass lump 10E heat shrinks partially, and can suppress hardening partially. As a result, the first mold 61 and the second mold 62 can be brought closer to each other, and the glass molded product can be thinned.

  Further, as described above, since the protruding portion 621 protrudes toward the first mold 61 rather than the second forming surface 62a, the protruding portion 621 is expanded from the second forming surface 62a side toward the protruding portion 621 side. The flow of the molten glass lump 10E is regulated by the protrusions 621, and is efficiently supplied to the recesses 65 as indicated by an arrow C1.

  Subsequently, as shown in FIG. 12, the first mold 61 and the second mold 62 are stopped in the fourth process of the pressure molding of the molten glass lump with the first mold and the second mold. It moves to the positions P12 and P22 and makes them close.

  The molten glass lump 10E expanded by bringing the first mold 61 and the second mold 62 close to each other is inside the first cavity portion 66 described above mainly defined by the first molding surface 61a and the second molding surface 62a. And it spreads in the above-mentioned 2nd cavity part 68 prescribed | regulated by the recessed part 65. FIG. As a result, the first cavity portion 66 and the second cavity portion 68 are filled with the molten glass lump 10E, and the molten glass lump 10E is applied by the first mold 61 and the second mold 62 at a predetermined pressure. The molten glass lump 10E is pressed under pressure.

  The surplus molten glass is transferred to the above-described first molten glass escape portion 67 defined by the second material escape portion 69 and the mold surface 61b of the first mold and the protruding portion 621 defined by the bottom side of the recess 65. Supplied. Part of the molten glass lump 10E supplied to the first molten glass escape portion 67 is in a state of protruding to the outside of the first mold 61 and the second mold 62.

  Here, the temperature of the molten glass at the start of the pressure treatment is preferably set to (Tg + 150) [° C.] or more and (Tg + 300) [° C.] or less with respect to the glass transition temperature Tg [° C.]. For example, when Tg is 540 [° C.], the temperature of the molten glass just before pressing may be 780 [° C.]. In order for the molten glass to satisfy such a temperature condition, the temperature of the first mold 61 is set to (Tg-80) [° C.] or more and (Tg-10) [° C.] or less, and the second mold 62 The temperature may be set to (Tg-60) [° C] or higher and (Tg-20) [° C] or lower. For example, when Tg is 540 [° C.], the temperature of the first mold 61 may be set to 520 [° C.] and the temperature of the second mold 62 may be set to 500 [° C.].

  Further, at the time of pressurization, for example, a pressure of 1.2 tons is applied to the molten glass lump 10E for 2 seconds. Thereby, the molten glass lump 10E is pressure-molded, and a glass molded product 10F (see FIG. 13) is molded.

  In addition, the initial position P11 by the first mold 61 and the second mold 62 in the first to fourth processes of the process of pressure-molding the molten glass lump described above with the first mold 61 and the second mold 62. The movement from P12 to the stop positions P12 and P22 is performed by the controller 90 driving the first mold driving mechanism 63 and the second mold driving mechanism 64.

  Next, as shown in FIG. 7, in the step (S14), the pressurization by the first mold and the second mold is released, and the glass molded product manufactured in the step (S15) is replaced with the first mold and The mold is released from the second mold.

  Then, as shown in FIG. 7, in a process (S16), the unnecessary part of the released glass molded product is cut and removed. FIG. 13 is a diagram showing a step of cutting and removing unnecessary portions of the released glass molded product shown in FIG.

  As shown in FIG. 13, the glass molded product 10 </ b> F taken out after mold release includes a planned product area constituted by the main plate part 13 and the side plate part 15, and spare areas 16 and 17 located around the planned product area. . The preliminary regions 16 and 17 correspond to unnecessary portions of the glass molded product. The preliminary area 16 is formed by the molten glass supplied to the first molten glass escape section 67 and the molten glass protruding from the first mold 61 and the second mold 62, and the preliminary area 17 is the second molten glass escape section. It is formed by the glass supplied to 69.

  By cutting and removing such preliminary regions 16 and 17 along the broken line portion in the figure, unnecessary portions of the glass molded product 10F after release are cut and removed. The manufacturing of the cover glass 10 is completed through the above steps.

  Here, the cover glass 10 as a glass molded product after mold release is formed by suppressing the partial curing of the molten glass lump 10E as described above, and bringing the first mold 61 and the second mold 62 close to each other. As a result, it is considerably thinner. For example, when the outer dimensions of the cover glass 10 are 120 mm × 60 mm and the total height H is 4 mm, the thickness T1 of the main plate portion 13 can be about 0.9 mm. In this case, the thickness T2 of the side plate portion 15 can be 1.2 mm.

  In addition, by sandwiching the molten glass in the horizontal direction, heat is transferred from the molten glass to the first mold 61 and the second mold 62 almost uniformly, and the front surface of the glass molded product after the mold release. And the back surface will be molded in a state where it is mirror surface or close to it. Therefore, the only additional processing required after pressure molding is to cut and remove the preliminary area of the pressure-molded glass molded product, and polish the front and back surfaces of the glass molded product. No additional polishing process is required.

  Accordingly, the cover glass 10 can have a product surface as a final product without obtaining a predetermined surface accuracy or without performing unnecessary polishing or grinding for thinning.

  By using the method and apparatus for manufacturing a glass molded product according to the present embodiment described above, a desired complicated three-dimensional shape can be obtained by a single pressure molding, and the glass molded product is reduced in thickness. Can be obtained.

  Moreover, the thermal contraction of the partial molten glass lump 10E can be suppressed as described above, and the molten glass lump 10E can be uniformly and uniformly spread in the direction parallel to the first molding surface 61a and the second molding surface 62a. Therefore, transferability and releasability can be ensured, and cracking during molding can be prevented.

(Embodiment 2)
In the present embodiment, a molten glass flow that moves continuously vertically downward is pressure-formed using a pair of molds arranged opposite to each other along the horizontal direction, and a glass molded product after pressure forming is formed. A manufacturing example in the case of manufacturing a cover glass by cutting and removing unnecessary portions without polishing and finishing will be shown. The glass molded product manufacturing apparatus in the present embodiment has basically the same configuration as the glass molded product manufacturing apparatus 50 in the first embodiment described above. Omitted.

  FIG. 14 is a flowchart showing a method for manufacturing a glass molded article according to Embodiment 2 of the present invention. 15 to 17 are diagrams showing the predetermined process shown in FIG. With reference to FIGS. 14 to 17, a method for manufacturing a glass molded product according to the present embodiment will be described.

  As shown in FIG. 14, first, in the step (S11), the first mold 61 and the second mold are arranged to face each other. Specifically, the first mold 61 and the second mold 62 are previously set so that the first molding surface 61a and the second molding surface 62a face each other through a position below the outflow pipe 73. It arrange | positions in the defined initial position P11, P21 (refer FIG. 15).

  Subsequently, as shown in FIG. 14, uncut molten glass is supplied between the first mold 61 and the second mold 62 in the step (S <b> 12 </ b> A). FIG. 15 is a diagram showing a step of supplying the uncut molten glass shown in FIG. 14 into the gap between the first mold and the second mold.

  As shown in FIG. 15, in the step of supplying the uncut molten glass flow 10 </ b> D, the molten glass flow 10 </ b> D that flows out vertically from the outlet 73 a of the outflow pipe 73 is not cut and is vertically cut. Is supplied to the gap between the first mold 61 and the second mold 62 so as to straddle the second molding surface 62 a and the recess 65.

  Next, as shown in FIG. 14, in a step (S13), the molten glass is pressure-molded with the first mold and the second mold. Specifically, the first mold 61 and the second mold 62 are moved from the initial positions P11 and P21 (see FIG. 15) to the stop positions P12 and P22 (see FIG. 16) in the same procedure as in the first embodiment. Let them be close.

  At this time, since the thickness of the molten glass flow 10D contacting the first mold 61 and the second mold 62 is substantially constant from the upper end to the lower end of the first mold 61 and the second mold 62 in the vertical direction, The molten glass flow 10D is uniformly and uniformly spread in a direction parallel to the first molding surface 61a and the second molding surface 62a.

  Thereby, it can suppress that the molten glass flow 10D partially heat-shrinks between the 1st metal mold | die 61 and the 2nd metal mold | die 62, and can suppress that it hardens | cures partially. As a result, the glass molded product can be thinned.

  By bringing the first mold 61 and the second mold 62 close to each other, the first cavity portion 66 and the second cavity portion 68 are filled with the molten glass flow 10D, and the molten glass flow 10D is filled with the first mold. The mold 61 and the second mold 62 are pressurized at a predetermined pressure, and the molten glass flow 10D is pressure-molded.

  Next, as shown in FIG. 14, in the step (S13A), the molten glass flow 10D is cut. FIG. 16 is a diagram showing a step of cutting the molten glass flow shown in FIG.

  As shown in FIG. 16, in the step of cutting the molten glass flow, the molten glass flow 10 </ b> D is cut by the cutter 81 during the pressure forming or when the pressure forming is completed. As a result, the uncured portion of the molten glass flow 10D positioned vertically above the cutter 81 and the portion including the glass molded product pressure-molded by the first mold 61 and the second mold 62 are separated. It will be.

  Next, as shown in FIG. 14, in the step (S14), the pressure applied by the first mold and the second mold is released, and in the step (S15), the manufactured glass molded product is replaced with the first mold. And released from the second mold.

  Then, as shown in FIG. 14, in a process (S16), the unnecessary part of the released glass molded product is cut and removed. FIG. 17 is a diagram showing a step of cutting and removing unnecessary portions of the released glass molded product shown in FIG.

  As shown in FIG. 17, the glass molded product 10F taken out after mold release includes a planned product area constituted by the main plate part 13 and the side plate part 15, and spare areas 16A and 17 positioned around the planned product area. . The preliminary area 16A is formed by the molten glass flow supplied to the first molten glass escape portion 67 and the molten glass flow protruding from the first mold 61 and the second mold 62, and the preliminary area 17 is the second molten glass. It is formed by a molten glass flow supplied to the escape portion 69.

  By cutting and removing such spare regions 16A and 17 along the broken line portion in the figure, unnecessary portions of the glass molded product after mold release are cut and removed. Through the above steps, the production of the cover glass is completed.

  Even when the cover glass is manufactured using the glass molded product manufacturing method and manufacturing apparatus according to the present embodiment described above, as in the case of the above-described first embodiment, one pressurization is performed. A desired complex three-dimensional shape can be obtained by molding, and a thin glass molded product can be obtained.

  In the first embodiment and the second embodiment described above, the case where the side plate portion 15 is connected to the pair of end portions located on the short side of the main plate portion 13 is described as an example. It is not limited as long as it is provided continuously from at least a part of the outer edge of the main plate part, and may be provided continuously at one end of the pair of ends located on the short side, or on the long side May be connected to at least one end portion of the pair of end portions positioned at the end of the main plate portion 13.

  In the case where the side plate portion 15 is continuously provided on the entire circumference of the main plate portion 13, the pair of side plate portions 15 located on the short side among the concave portions for forming the side plate portion 15 in the manufacturing process of the glass molded product. The second mold 62 may be arranged so that the molten glass supplied in the vertical direction straddles the corresponding part, or the part corresponding to the pair of side plate parts 15 located on the long side is set in the vertical direction. The 2nd metal mold | die 62 may be arrange | positioned so that the molten glass supplied to may straddle.

  In the first and second embodiments described above, the first mold 61 and the second mold 62 are formed in the step of pressure-molding the molten glass with the first mold 61 and the second mold 62. However, the present invention is not limited to this. Only the first mold 61 may be moved toward the second mold 62, or only the second mold 62 may be moved. You may move toward the 1st metal mold | die 61. FIG.

  Furthermore, in the above-described first and second embodiments, the case where the second mold 62 is provided with the protruding portion 621 that protrudes from the second molding surface 62a toward the first mold 61 is illustrated. However, the present invention is not limited to this, and the projection surface 621 may not be provided, and the outer mold surface of the recess 65 may be configured to be flush with the second molding surface 62a. Also in this case, the molten glass can be supplied to the recess 65 by bringing the first mold 61 and the second mold 62 close to each other.

  In the first embodiment and the second embodiment described above, the case where the concave portion 65 defines the second cavity portion 68 and the second molten glass escape portion 69 corresponding to the side plate portion 15 has been described as an example. Without being limited thereto, only the second cavity portion 68 may be defined.

  In the first embodiment and the second embodiment described above, the case where the front surface 13a and the back surface 13b of the main plate portion 13 of the cover glass 10 are formed as flat surfaces is exemplified, but the present invention is not limited thereto. Instead, a concave portion or a convex portion such as a logo mark or an icon may be formed on at least one of the front surface 13a and the back surface 13b of the main plate portion 13. Such a logo mark or icon is formed on at least one of the first molding surface 61a of the first mold 61 and the second molding surface 62a of the second mold 62 with a convex portion or a concave portion corresponding to the shape of the logo mark or icon. Can be formed.

  In this case, it is possible to obtain a glass molded article having a complicated three-dimensional shape in which surface accuracy is good and logo marks, icons and the like are formed only by one press molding. As a result, it is possible to omit grinding or polishing to form a logo mark, an icon, and the like, and a glass molded product including the logo mark, the icon, etc. can be manufactured more easily.

  In addition, in the first embodiment and the second embodiment described above, the case where the glass molded product is applied to the cover glass that covers the display 40 of the display device 100 is described as an example. For example, a glass molded product may be applied to an exterior cover of an electronic device such as a mobile computer or a digital camera. Further, a cover glass that covers the display 40 of the display apparatus 100 may be used as an exterior cover of the display apparatus 100.

  Although the embodiments of the present invention have been described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  10 cover glass, 10D molten glass flow, 10E molten glass lump, 10F glass molded product, 11, 13a, 15a front surface, 12, 13b, 15b back surface, 13 main plate portion, 15 side plate portion, 16, 17 spare area , 18 Open space, 19 Open portion, 20 Exterior plate, 21 Plate-like portion, 22 Side wall portion, 30 Circuit board, 40 Display, 42 Image display portion, 50 Manufacturing device, 60 Molding portion, 61 First mold, 61a First 1 molding surface, 61b mold surface, 62 second mold, 62a second molding surface, 63 first mold drive mechanism, 64 second mold drive mechanism, 65 recess, 65a inner surface, 66 first cavity portion, 67 First molten glass escape part, 68 Second cavity part, 69 Second molten glass escape part, 70 Molten glass supply part, 71 Continuous melting furnace, 72 Nozzle part, 7 3 Outflow pipe, 73a Outlet, 80 cutting part, 81 cutter, 82 cutter drive mechanism, 90 control part, 100 display device, 621 protruding part.

Claims (8)

A glass molded product manufacturing method for manufacturing a glass molded product including a main plate portion and a side plate portion continuously provided from at least a part of an outer edge of the main plate portion by pressure molding,
A first mold including a first molding surface for molding the front surface of the main plate portion, a second molding surface for molding the back surface of the main plate portion, and a recess for molding the side plate portion A step of horizontally disposing a second mold including
Supplying molten glass so as to move vertically downward into the gap between the first mold and the second mold disposed opposite to each other;
A step of pressure-molding the molten glass supplied to the gap between the first mold and the second mold with the first mold and the second mold,
In the state where the first mold and the second mold are arranged to face each other, the concave portion is arranged on at least one side of a pair of end portions of the second molding surface facing along the vertical direction. 2 adjacent to the molding surface so as to be aligned along the vertical direction,
In the step of supplying the molten glass, the molten glass is supplied so as to straddle the second molding surface and the recess along the vertical direction,
In the step of pressure-molding the molten glass, the molten glass that has been spread by bringing the first mold and the second mold close to each other is supplied into the recess, whereby the main plate portion A manufacturing method of a glass molded product, wherein a front surface is formed by the first mold, and a back surface of the main plate portion and a surface of the side plate portion are formed by the second mold. In the state where the first mold and the second mold are arranged to face each other, the second mold has the second molding on the side opposite to the side where the second molding surface is located when viewed from the recess. A protrusion that protrudes toward the first mold from the surface;
The method for producing a glass molded product according to claim 1, wherein in the step of pressure forming the molten glass, the flow of the molten glass is regulated by the protrusion.   Of the surface of the second mold that defines the recess, a pair of inner side surfaces that face along the vertical direction in a state where the first mold and the second mold are arranged to face each other are the second mold. The manufacturing method of the glass molded product of Claim 1 or 2 comprised by the inclined surface so that the external shape of the said recessed part may become small as it leaves | separates from a shaping | molding surface.   The manufacturing method of the glass molded product of Claim 3 whose inclination | tilt angle of the said inclined surface which the said inclined surface and the normal line of the said 2nd shaping | molding surface comprise is 1 degree or more and 10 degrees or less. The glass molded product includes a product planned area including the main plate part and the side plate part, and a preliminary area positioned around the product planned area,
The manufacturing method of the glass molded product of any one of Claim 1 to 4 further equipped with the process of removing the said reserve area | region of the said glass molded product after pressure molding. In the step of pressure-molding the molten glass, the first molten glass escape portion corresponding to the preliminary region is seen from the concave portion by the second mold and the second mold that are arranged close to each other. Formed on the side opposite the side where the molding surface is located,
The manufacturing method of the glass molded product of Claim 5 with which the said preliminary | backup area | region is formed with the said molten glass supplied to the said 1st molten glass escape part. The second mold further includes a second molten glass escape portion corresponding to the preliminary region in a portion on the bottom side of the concave portion,
The manufacturing method of the glass molded product of Claim 5 or 6 with which the said preliminary | backup area | region is formed with the said molten glass supplied to the said 2nd molten glass escape part. A glass molded product manufacturing apparatus for manufacturing a glass molded product including a main plate portion and a side plate portion continuously provided from at least a part of an outer edge of the main plate portion by pressure molding,
A first mold and a second mold disposed opposite to each other in the horizontal direction;
A molten glass supply unit for supplying molten glass so as to move along a vertical direction in a gap between the first mold and the second mold disposed opposite to each other;
A drive mechanism for relatively moving the first mold and the second mold;
A control unit for controlling the operation of the drive mechanism,
The first mold includes a first molding surface for molding the front surface of the main plate portion,
The second mold includes a second molding surface for molding the back surface of the main plate portion, and a recess for forming the side plate portion,
In the state where the first mold and the second mold are arranged to face each other, the concave portion is arranged on at least one side of a pair of end portions of the second molding surface facing along the vertical direction. 2 adjacent to the molding surface so as to be aligned along the vertical direction,
The control unit includes the molten glass supplied so as to straddle the second molding surface and the concave portion along a vertical direction in a gap between the first mold and the second mold that are arranged to face each other. The molten glass is supplied into the recess by spreading the first mold and the second mold by bringing them close to each other, whereby the front surface of the main plate portion is the first mold. An apparatus for manufacturing a glass molded product that controls the operation of the drive mechanism so that the back surface of the main plate portion and the surface of the side plate portion are formed by the second mold.

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