JP2014227315A - Method and apparatus for manufacturing glass molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass molding by using pressure molding based upon a direct press method, which can suppress variance in quality, and also easily and securely finish the surface of the glass molding in a mirror-surface or substantially mirror-surface state without performing polishing processing.SOLUTION: A method for manufacturing a glass molding includes the steps of: arranging a first metal mold 31 and a second metal mold 32 so as to face each other along a horizontal direction; supplying a molten glass gob 51 so as to fall between the first metal mold 31 and second metal mold 32; bringing the molten glass gob 51 into contact with a mold face 31a of the first metal mold 31 by moving the first metal mold 31 toward the second metal mold 32, and wetting the mold face 31a of the first metal mold 31 with the spread molten glass gob 51 by the contacting shock; and bringing a mold face 32a of the second metal mold 32 into contact with the spread molten glass gob 31 to perform pressure molding of the molten glass gob 51 by using the first metal mold 31 and second metal mold 32.

Description

  The present invention is based on a so-called direct press method, and a glass molded product manufacturing method for manufacturing a glass molded product by pressure-molding molten glass using a die arranged opposite to the vertical direction. And a manufacturing apparatus.

  As one of the glass molded products, a thin cover glass provided in a display device represented by a smartphone or a tablet terminal is widely used. The cover glass is a portion that appears exposed on the outer surface of a display device or the like, and its front and back surfaces are required to be mirror-finished.

  The mirror finish can be realized by applying polishing to one or both sides of a glass blank as a glass molded product. However, when mirror finishing is performed in the polishing process, a separate polishing process is required in addition to various processes such as a molding process, which complicates the manufacturing process and leads to an increase in manufacturing cost.

  Furthermore, in recent years, 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 of the main plate portion is required. When manufacturing a cover glass having such a complicated three-dimensional shape, it may be difficult to polish the surface due to the shape.

  On the other hand, from the viewpoint of simplifying the manufacturing process, a so-called direct press method in which molten glass is directly pressure-molded using a mold has been proposed. In the case of using the direct press method, there is a merit that a glass molded product can be obtained in a form close to or close to the final shape by pressure molding. There is also an advantage that the surface can be finished in a close state.

  As an example of a manufacturing method when manufacturing a glass molded product by applying the direct press method, the molten glass lump is dropped, and the dropped molten glass lump is sandwiched in a horizontal direction using a pair of molds, and pressure-molded. Manufacturing methods are known. As a document disclosing the manufacturing method of this kind of glass molded article, for example, Japanese Patent Application Laid-Open No. 2011-207738 (Patent Document 1), Japanese Patent Application Laid-Open No. 2011-213551 (Patent Document 2), and Japanese Patent Application Laid-Open No. 2012-158513. (Patent Document 3).

JP 2011-207738 A JP 2011-213551A JP 2012-158513 A

  Here, in the case where the dropped molten glass lump is sandwiched in the horizontal direction using a pair of molds and pressure-molded, there is a problem that the quality of the manufactured glass molded product tends to vary. This is because it is extremely difficult to completely match the shape of the molten glass lump to be dropped and the dropping position of the molten glass lump every time even when the glass molding is repeatedly produced using the same production apparatus. This is because it is inevitable that variations occur in various manufacturing conditions in a strict sense.

  In addition, when the glass molded product to be manufactured has a non-disc shape (for example, a rectangular plate shape or a substantially box shape as described above) like the cover glass described above, it is melted by a pair of molds. When the glass lump is spread out, there is a large difference in how the molten glass lump is spread in the direction parallel to the mold surface, resulting in a problem that transferability is reduced at the corner of the glass molded product. Also occurs.

  Therefore, the present invention has been made to solve the above-described problems, and can suppress variation in the quality of the glass molded product to be manufactured, and can easily and reliably perform a mirror surface without performing a polishing process. Another object of the present invention is to provide a method and apparatus for producing a glass molded product based on the direct press method capable of finishing the surface of the glass molded product in a state close to that.

  The manufacturing method of the glass molded product based on this invention is the process of arrange | positioning a 1st metal mold | die and a 2nd metal mold | die opposingly along the direction which cross | intersects a perpendicular direction, Supplying the molten glass so as to move vertically downward, and moving the first mold toward the second mold along a direction intersecting the vertical direction, Molten glass that moves vertically downward between the mold and the second mold is brought into contact with the mold surface of the first mold, and the impact causes the molten glass on the mold surface of the first mold. The first mold and the second mold by bringing the mold surface of the second mold into contact with the molten glass after wetting and spreading on the mold surface of the first mold; And a step of pressure-molding the molten glass.

  In the method for producing a glass molded product according to the present invention, the time from when the molten glass is brought into contact with the mold surface of the first mold until the molten glass is brought into contact with the mold surface of the second mold. 0.02 [second] or more and 0.5 [second] or less is preferable.

  In the manufacturing method of the glass molded product based on the said invention, the said 1st metal mold | die and the said 2nd metal mold | die may be opposingly arranged along the horizontal direction.

  In the method for manufacturing a glass molded product according to the present invention, the first mold and the second mold are arranged to face each other along an oblique direction that is not parallel to either the vertical direction or the horizontal direction. It may be.

  In the method for producing a glass molded product according to the present invention, the molten glass moving downward in the vertical direction may be a molten glass lump falling in the downward vertical direction.

  In the method for producing a glass molded article according to the present invention, the molten glass moving vertically downward may be a molten glass flow continuously moving vertically downward. In that case, the method for producing a glass molded product according to the present invention further includes the first mold and the second mold after the start of pressure molding by the first mold and the second mold. It is preferable to provide a step of cutting the molten glass flow outside the mold.

  The method for producing a glass molded product according to the present invention further includes the step of forming a glass molded product obtained by pressure molding molten glass with the first mold and the second mold with the first mold and You may provide the process of releasing from the said 2nd metal mold | die, and the process of cut | disconnecting and removing the unnecessary part of the glass molded product after mold release.

  An 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 along a direction intersecting a vertical direction, and between the first mold and the second mold. A molten glass supply unit for supplying molten glass so as to move vertically downward, a drive mechanism for relatively moving the first mold and the second mold, and controlling the operation of the drive mechanism And a control unit. The control unit moves the first mold toward the second mold along a direction intersecting the vertical direction, thereby vertically moving between the first mold and the second mold. The molten glass moving toward the mold is brought into contact with the mold surface of the first mold, and the molten glass is wetted and spread on the mold surface of the first mold by the impact, and then the mold surface of the first mold The drive mechanism is configured to press the molten glass by the first mold and the second mold by bringing the mold surface of the second mold into contact with the molten glass after wetting and spreading on the top. To control the operation.

  According to the present invention, it is possible to suppress the occurrence of variations in the quality of the glass molded product to be manufactured, and finish the surface of the glass molded product easily or surely in a mirror-like or near state without performing a polishing process. It is possible to provide a manufacturing method and a manufacturing apparatus for a glass molded product based on the direct press method.

It is the schematic of the manufacturing apparatus of the glass molded product in Embodiment 1 of this invention. It is a figure which shows the flow of the manufacturing method of the glass molded product in Embodiment 1 of this invention. It is a figure which shows the state after the process of arrange | positioning the 1st metal mold | die and 2nd metal mold | die in the flow shown in FIG. It is a figure which shows the back state of the process of cut | disconnecting the molten glass flow in the flow shown in FIG. It is a figure which shows the process of supplying the molten glass lump in the flow shown in FIG. 2 between a 1st metal mold | die and a 2nd metal mold | die. It is a figure which shows the back state of the process which makes a 1st metal mold | die contact the molten glass lump in the flow shown in FIG. It is a figure which shows the state of the molten glass lump after wet-spreading on the mold surface of the 1st metal mold | die by the process which makes a 1st metal mold contact the molten glass lump in the flow shown in FIG. It is a figure which shows the process of making a 2nd metal mold | die contact the molten glass lump in the flow shown in FIG. 2, and pressure-molding. It is a figure which shows the other example of the process of making a 2nd metal mold contact the molten glass lump in the flow shown in FIG. 2, and pressure-molding. It is a figure which shows the process of supplying a molten glass lump between a 1st metal mold | die and a 2nd metal mold | die in the manufacturing method of the glass molded product in Embodiment 2 of this invention. In the manufacturing method of the glass molded product in Embodiment 2 of this invention, it is a figure which shows the back state of the process of making a 1st metal mold | die contact a molten glass lump. In the manufacturing method of the glass molded product in Embodiment 2 of this invention, it is a figure which shows the process of making a 2nd metal mold | die contact a molten glass lump, and pressure-molding. It is a figure which shows the flow of the manufacturing method of the glass molded product in Embodiment 3 of this invention. It is a figure which shows the process of supplying the molten glass flow between a 1st metal mold | die and a 2nd metal mold | die after the process of arrange | positioning the 1st metal mold | die and a 2nd metal mold | die opposingly in the flow shown in FIG. . It is a figure which shows the back state of the process which makes a 1st metal mold | die contact the molten glass flow in the flow shown in FIG. It is a figure which shows the state of the molten glass flow after wet-spreading on the type | mold surface of a 1st metal mold | die by the process of making a 1st metal mold | die contact the molten glass lump in the flow shown in FIG. It is a figure which shows the process of making it press-molded by making a 2nd metal mold | die contact the molten glass flow in the flow shown in FIG. It is a figure which shows the process of cut | disconnecting the molten glass flow in the flow shown in FIG. It is a figure which shows the process of cut | disconnecting the glass molded product in the flow shown in FIG. It is a figure which shows the process of supplying a molten glass lump between a 1st metal mold | die and a 2nd metal mold | die in the manufacturing method of the glass molded product in Embodiment 4 of this invention.

  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)
This embodiment press-molds a molten glass lump that is cut from a molten glass flow and falls vertically downward using a pair of molds arranged to face each other in the horizontal direction, and after the pressure molding The manufacturing example in the case of manufacturing a rectangular plate-shaped cover glass only by cutting and removing an unnecessary part, without grind-finishing a glass molded product is shown.

  FIG. 1 is a schematic view of a glass molded product manufacturing apparatus according to the present embodiment. First, with reference to FIG. 1, the structure of the manufacturing apparatus of the glass molded product in this Embodiment is demonstrated.

  The apparatus for producing a glass molded product in the present embodiment produces a cover glass as a glass molded product based on a so-called direct press method, and sequentially produces a plurality of cover glasses.

  As shown in FIG. 1, the glass molded product manufacturing apparatus 1 mainly includes a material supply unit 10, a cutting unit 20, a molding unit 30, and a control unit 40.

  The material supply unit 10 is a part for melting the glass material and supplying the molten glass to the molding unit 30. The cutting unit 20 is a part for adjusting the amount of molten glass supplied from the material supply unit 10 to the forming unit 30 to an appropriate amount. The shaping | molding part 30 is a site | part for press-molding the supplied molten glass using a metal mold | die. The control unit 40 is a part for controlling the operations of the cutting unit 20 and the molding unit 30 described above.

  The material supply unit 10 includes a continuous melting furnace 11, a nozzle unit 12, and an outflow pipe 13. The continuous melting furnace 11 melts a glass material and stores the molten glass, and the nozzle unit 12 introduces the molten glass stored in the continuous melting furnace 11 into the outflow pipe 13. The outflow pipe 13 has an outflow port 13a (see FIG. 3 and the like) at the lower end thereof, and allows the molten glass flow 50 to flow out continuously downward from the outflow port 13a.

  The cutting unit 20 includes a cutter 21 and a cutter driving mechanism 22 as a cutting mechanism. The cutter 21 cuts the molten glass flow 50 flowing out from the outflow pipe 13 and separates the cut portion from the molten glass flow 50, and is driven by the cutter driving mechanism 22 described above. The cutter 21 is constituted by a pair of flat plate-shaped shear blades, and the pair of shear blades are abutted below the outflow pipe 13 to cut the molten glass flow 50. The cutter driving mechanism 22 receives a command from the control unit 40 and drives the cutter 21. As the cutter drive mechanism 22, 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 30 includes a first mold 31, a second mold 32, a first mold drive mechanism 33, and a second mold drive mechanism 34. The first mold 31 and the second mold 32 are molds that face each other in the horizontal direction in a pressure molding process to be described later. The first mold 31 is moved by being driven by the first mold drive mechanism 33 described above, and the second mold 32 is moved by being driven by the second mold drive mechanism 34 described above.

  Examples of materials for forming the first mold 31 and the second mold 32 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 31 and the second mold 32 may be made of the same material, or may be made of different materials.

  The surfaces of the first mold 31 and the second mold 32 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 31 and the 2nd metal mold | die 32 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 drive mechanism 33 is driven in response to a command from the control unit 40 to move the first mold 31 in the DR1 direction (horizontal direction) indicated by an arrow in FIG. The second mold drive mechanism 34 is driven in response to a command from the control unit 40, thereby moving the second mold 32 in the DR2 direction (horizontal direction) indicated by an arrow in FIG. Various types can be used as the first mold driving mechanism 33 and the second mold driving mechanism 34, 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 drive mechanism 33 and the second mold drive mechanism 34 by the control unit 40, a mode for controlling the positions of the first mold 31 and the second mold 32 (position control mode), There is a mode (load control mode) for controlling the load applied relatively to the first mold 31 and the second mold 32, and it is preferable that these two control modes can be switched. The first mold drive mechanism 33 and the second mold drive mechanism 34 can press-mold molten glass with a maximum pressure of 3 tons using the first mold 33 and the second mold 32. It is preferable that it is comprised.

  The control unit 40 controls the operations of the cutter drive mechanism 22, the first mold drive mechanism 33, and the second mold drive mechanism 34 described above. That is, the control unit 40 manufactures a cover glass as a glass molded product such as timing of cutting the molten glass flow 50 by the cutter 21, timing of movement of the first mold 31, and timing of movement of the second mold 32. A series of such sequences is controlled.

  FIG. 2 is a diagram showing a flow of a method for manufacturing a glass molded product in the present embodiment. 3 to 8 are diagrams showing a predetermined step in the flow shown in FIG. 2 or a state after the predetermined step. Next, with reference to these FIG. 2 thru | or FIG. 8, the manufacturing method of the glass molded product in this Embodiment is demonstrated in order.

  The method for manufacturing a glass molded product in the present embodiment shown below is a method for manufacturing a cover glass as a glass molded product based on a so-called direct press method, and the apparatus for manufacturing a glass molded product in the present embodiment described above. 1 can be suitably used. Moreover, the manufacturing method of the glass molded product in this Embodiment can manufacture a some cover glass sequentially by repeating the series of processes mentioned later.

The cover glass manufactured according to the method for manufacturing a glass molded product in the present embodiment has a glass composition of SiO _{2 of} 50 [wt%] or more and 70 [wt%] or less, and 5 [wt%] or more and 15 [weight]. %] Al ₂ O ₃ or less, B ₂ O _{3 of} 0 [wt%] or more and 5 [wt%] or less, Na ₂ O of 5 [wt%] or more and 20 [wt%] or less, and 0 [wt] %] To 10 [wt%] K ₂ O, 0 [wt%] to 10 [wt%] MgO, 0 [wt%] to 10 [wt%] CaO, and 0 [wt] %] To 5 [wt%] BaO, 0 [wt%] to 5 [wt%] TiO ₂ , and 0 [wt%] to 15 [wt%] ZrO _2. Preferably it is.

  If the cover glass has the glass composition as described above, when the glass transition point is Tg [° C.], it greatly affects the shape transferred to the glass by pressure molding (Tg-30). Maintains proper glass viscosity in the temperature range of [° C.] or more and (Tg + 150) [° C.] or less, completes surface transfer while ensuring good transferability, and suppresses cracking due to thermal shrinkage of glass can do.

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.]. Preferably there is. 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 preferable. In the present embodiment, the case of producing a flat cover glass is illustrated, but glass having the above characteristics is particularly suitable for forming a cover glass having a curved shape.

  Moreover, it is preferable that the outer shape of the cover glass has a size within a range of 40 [mm] × 40 [mm] or more and 300 [mm] × 300 [mm] or less in a plan view. Within such a range, the glass molded product manufacturing method in the present embodiment to be described later can be suitably used.

  In addition, both the front and back surfaces of the cover glass must be finished to a mirror surface or a state close to this. Therefore, the surface roughness of the front and back surfaces of the cover glass is preferably about 0.5 [nm] or more and 20 [nm] or less, but the manufacturing method of the glass molded product in the present embodiment described later is It is possible to mold the rubber glass so as to satisfy the conditions.

  Here, in the manufacturing method of the glass molded product in this Embodiment, the 1st metal mold | die 31 and the 2nd metal mold | die 32 are each heated beforehand by predetermined | prescribed temperature by the heating means mentioned above. Here, the predetermined temperature means a temperature at which a good transfer surface can be formed on the glass molded product.

  Generally, if the temperature of the first mold 31 and the second mold 32 is too low, it becomes difficult to form a highly accurate transfer surface. On the other hand, if the temperature of the first mold 31 and the second mold 32 is set too high more than necessary, fusion between the molten glass and the first mold 31 and the second mold is likely to occur. This is not preferable because the life of the mold 32 may be shortened.

  Usually, the temperature of the first mold 31 and the second mold 32 is (Tg−100) [° C.] or more and (Tg + 100) [° C.] or less with respect to the glass transition point Tg [° C.] of the glass material to be pressure-molded. Set to the range. Actually, taking into account various conditions such as the type of glass material, the shape and size of the cover glass as a glass molded product, the forming material of the first mold 31 and the second mold 32, the type of protective film, etc. To determine the appropriate temperature. The heating temperature of the first mold 31 and the second mold 32 may be the same temperature or different temperatures.

  The manufacturing method of the glass molded product in this Embodiment is the 1st metal mold | die 31 and the 2nd metal mold | die after the 1st metal mold | die 31 and the 2nd metal mold | die 32 are heated to predetermined temperature, and the molten glass in a high temperature state is used. Since press molding is performed using 32, a series of steps to be described later can be performed while keeping the temperature of the first mold 31 and the second mold 32 constant. Furthermore, a plurality of cover glasses can be sequentially manufactured while keeping the temperature of the first mold 31 and the second mold 32 constant. Therefore, since it is not necessary to repeat heating and cooling of the first mold 31 and the second mold 32 every time one cover glass is manufactured, a plurality of cover glasses can be manufactured efficiently in a very short time. it can.

  Here, keeping the temperature of the first mold 31 and the second mold 32 constant means that the target set temperature in the temperature control for heating the first mold 31 and the second mold 32 is kept constant. Meaning. Therefore, it is not intended to prevent even the temperature fluctuations of the first mold 31 and the second mold 32 due to the contact of the molten glass or the like during the execution of each process described later, and such temperature fluctuations are permissible.

  First, as shown in FIG. 2, the first mold and the second mold are arranged to face each other (step S11). FIG. 3 is a diagram illustrating a state after the step of arranging the first mold and the second mold to face each other.

  Specifically, as shown in FIG. 3, the first mold 31 and the second mold 32 are such that the mold surfaces 31 a and 32 a that the first mold 31 and the second mold 32 have face each other through a position below the outflow pipe 13. Are arranged at predetermined initial positions P11 and P21, respectively. Here, the first mold 31 and the second mold 32 are arranged so that their mold surfaces 31a and 32a are orthogonal to the horizontal plane, whereby the first mold 31 and the second mold 32 are horizontal. It will be arranged oppositely along the direction. The first mold 31 and the second mold 32 are moved to the initial positions P11 and P12 by the controller 40 driving the first mold drive mechanism 33 and the second mold drive mechanism 34. .

  Next, as shown in FIG. 2, the molten glass flow is cut (step S12). FIG. 4 is a diagram illustrating a state after the step of cutting the molten glass flow.

  As shown in FIG. 3, a molten glass flow 50 continuously flows out vertically from the outlet 13 a of the outflow pipe 13 (in the direction of arrow A shown in FIG. 3). The length gradually increases in proportion to time. As shown in FIG. 4, when the length of the molten glass flow 50 reaches a predetermined length, the molten glass flow 50 is cut by the cutter 21. As a result, the molten glass lump 51 separated from the molten glass flow 50 falls down vertically (in the direction of arrow B shown in FIG. 4). The cutting of the molten glass flow 50 is performed by the control unit 40 moving the cutter 21 in the direction of arrow C1 shown in FIG. 4 using the cutter driving mechanism 22, and after the cutting is completed, the cutter 21 The original position is restored by being moved in the reverse direction (the direction of arrow C2 shown in FIG. 5).

  Next, as shown in FIG. 2, the molten glass lump is supplied between the first mold and the second mold (step S13). FIG. 5 is a diagram illustrating a process of supplying the molten glass lump between the first mold and the second mold.

  As shown in FIG. 5, the molten glass lump 51 separated from the molten glass flow 50 by being cut by the cutter 21 falls based on gravity, and the first mold 31 and the second mold 32. Move vertically downward (in the direction of arrow B shown in FIG. 5). As a result, the molten glass block 51 is supplied between the first mold 31 and the second mold 32.

  Next, as shown in FIG. 2, a 1st metal mold | die is made to contact a molten glass lump (process S14). FIG. 6 is a diagram illustrating a state after the step of bringing the first mold into contact with the molten glass lump, and FIG. 7 illustrates a state of the molten glass lump after being wet spread on the mold surface of the first mold. FIG.

  Specifically, as shown in FIG. 6, at a predetermined timing before and after the molten glass block 51 is supplied between the first mold 31 and the second mold 32, the first mold 31 is horizontal. It is moved in the direction toward the second mold 32 (in the direction of arrow D shown in FIG. 6). As a result, the first mold 31 passes through a position below the outflow pipe 13 and stops at a predetermined stop position P12 determined in advance. At that time, the falling molten glass block 51 comes into contact with and adheres to the mold surface 31 a of the first mold 31. The movement of the first mold 31 from the initial position P11 to the stop position P12 is performed by the controller 40 driving the first mold drive mechanism 33.

  At this time, by quickly moving the first mold 31 at a predetermined moving speed, as shown in FIG. 7, the molten glass lump 51 attached to the mold surface 31a of the first mold 31 is affected by the impact. It spreads wet on the surface 31a. For this reason, the molten glass instantaneously and substantially spreads along the direction parallel to the mold surface 31a, and high transferability can be obtained in the pressure molding process described later. In addition, in FIG. 7, a mode that the molten glass spreads on the mold surface 31a is schematically indicated by an arrow AR.

  Here, the size of the molten glass lump 51 after wetting and spreading on the mold surface 31a of the first mold 31 is the product molding surface of the mold surface 31a (that is, the region that becomes the product of the glass molded product). However, it is preferable that each of the vertical and horizontal widths of the product molding surface of the first mold 31 is 70% or more. The size of the molten glass lump 51 after spreading and spreading can be controlled by adjusting the amount of the molten glass lump 51 and the moving speed of the first mold 31.

  Next, as shown in FIG. 2, pressure molding is performed by bringing the second mold into contact with the molten glass lump (step S15). FIG. 8 is a diagram showing a step of pressure molding by bringing the second mold into contact with the molten glass lump.

  Specifically, as shown in FIG. 8, at a predetermined timing before and after the first mold 31 is brought into contact with the molten glass block 51, the second mold 32 is directed toward the first mold 31 in the horizontal direction. (In the direction of arrow E shown in FIG. 8). Thereby, the 2nd metal mold | die 32 will approach the 1st metal mold | die 31, and will stop in the predetermined stop position P22 defined beforehand. At that time, the mold surface 32a of the second mold 32 comes into contact with the molten glass lump 51 after wetting and spreading on the mold surface 31a of the first mold 31, and the molten glass lump 51 is moved by the mold surface 32a. Pressurized and further expanded.

  The molten glass lump 51 spread out spreads into the cavity defined by the first mold 31 and the second mold 32, whereby the inside of the cavity is filled with the molten glass lump 51 and the molten glass lump 51. Is pressed at a predetermined pressure by the first mold 31 and the second mold 32, and the molten glass lump 51 is pressure-molded. The movement of the second mold 32 from the initial position P21 to the stop position P22 is performed by the controller 40 driving the second mold drive mechanism 34.

  Here, the time from the time when the molten glass block 51 is brought into contact with the mold surface 31a of the first mold 31 to the time when the molten glass block 51 is brought into contact with the mold surface 32a of the second mold 32 is 0.02 [seconds]. It is preferable that it is 0.5 [second] or less. If the time is 0.02 [seconds] or more, the molten glass lump 51 can be sufficiently wetted and spread on the mold surface 31a of the first mold 31. On the other hand, if the time is set to 0.5 [seconds] or less, the molten glass lump 51 has the first temperature change before the temperature change that can occur in the molten glass lump 51 increases due to contact with the mold surface 31a of the first mold 31. 2 The mold surface 32a of the mold 32 can be brought into contact, and the temperature of the surface layer portion of the molten glass lump 51 during pressure molding can be maintained more evenly (that is, the first mold of the molten glass lump 51). It is possible to prevent a large temperature difference between the surface located on the 31st side and the surface located on the 2nd mold 32 side), and high transferability can be obtained.

  The state in which the molten glass block 51 is pressed by the first mold 31 and the second mold 32 is maintained for a predetermined time. As a result, the molten glass is cured while the shapes of the mold surface 31a of the first mold 31 and the mold surface 32a of the second mold 32 are transferred to the molten glass, thereby forming a glass molded product. The

  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 point 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 32 is set to 460 [° C.] or more and 530 [° C.] or less, and the temperature of the second mold 32 is set to 480 [° C.] or more and 520 [° C] should be set below. For example, when Tg is 540 [° C.], the temperature of the first mold 32 may be set to 520 [° C.], and the temperature of the second mold 32 may be set to 500 [° C.].

  Next, as shown in FIG. 2, the pressurization by the first mold and the second mold is released (step S16), and the manufactured glass molded product is released from the first mold and the second mold. (Step S17), unnecessary portions of the glass molded product after mold release are cut and removed (Step S18). Thus, the production of the cover glass is completed.

  Here, the front and back surfaces of the glass molded product after mold release are both formed into a mirror surface or a state close thereto by the above-described pressure molding. Therefore, as an additional process required after pressure molding, the peripheral part of the pressure-molded glass molded product (the peripheral part is unnecessary) so that the glass molded product has a rectangular plate shape. It is only necessary to cut and remove the material (corresponding to the above), and a polishing process for polishing the front and back surfaces is not required.

  As described above, by manufacturing the cover glass using the glass molded product manufacturing method and the manufacturing apparatus 1 in the present embodiment, the molten glass lump 51 attached to the first mold 31 is affected by the impact. Since it wets and spreads instantaneously on the mold surface 31a of the first mold 31, it is manufactured even when some variation occurs in the shape of the molten glass lump 51 to be dropped and the dropping position of the molten glass lump 51. Variations in the quality of the cover glass can be suppressed.

  Further, as described above, the molten glass lump 51 adhering to the first mold 31 spreads instantly on the mold surface 31a of the first mold 31 due to the impact, and thereafter the mold of the second mold 32 without delay. Since the molten glass lump 51 is pressurized by the surface 32a, the glass hardening of the molten glass lump 51 proceeds more uniformly and uniformly over the entire surface, and wrinkles (minute irregularities generated in ripples) are formed on the surface. Generation | occurrence | production can be suppressed and transcription | transfer property improves significantly. Therefore, the surface of the cover glass can be finished with a mirror surface or a state close to it without fail.

  Therefore, by using the glass molded product manufacturing method and the manufacturing apparatus 1 according to the present embodiment, it is possible to suppress variations in the quality of the rectangular plate-shaped cover glass as the glass molded product to be manufactured, and polishing. It is possible to finish the surface with a mirror surface or a state close to it easily and reliably without any treatment.

  Furthermore, when the manufacturing method and the manufacturing apparatus 1 of the glass molded product in the present embodiment are used, the first mold 31 and the second mold 32 used at the time of pressure molding are arranged to face each other in the horizontal direction. Therefore, the second mold 32 can be brought into contact with the molten glass lump 51 attached to the first mold 31 without delay. For example, when the molten glass lump is sandwiched by using a pair of molds (that is, an upper mold and a lower mold) arranged along the vertical direction, the dropping direction of the molten glass lump to be added and the addition direction are added. Since the movement direction of the mold at the time of pressure forming matches, the upper mold cannot be arranged in advance above the lower mold (this is because the material supply unit and the upper mold are When the molten glass lump is supplied to the lower mold, the lower mold is quickly moved and placed below the upper mold, and then the upper mold and the lower mold are brought closer to each other. However, in the method and apparatus 1 for manufacturing a glass molded product in the present embodiment, the first mold 31 and the second mold used at the time of pressure molding are required. Without physically interfering the mold 32 with the material supply unit in advance This is because it is possible to keep to countercurrent arrangement. Therefore, the second mold 32 can be brought into contact with the molten glass lump 51 adhered to the first mold 31 without delay by using the glass molded product manufacturing method and the manufacturing apparatus 1 in the present embodiment. As a result, the transferability is greatly improved, and the surface of the cover glass can be finished more reliably in a mirror surface or in a state close to it without performing a polishing process.

  In the above, the first die 31 and the second die 31 are formed in a planar shape by forming both the mold surfaces 31a and 32a of the first die 31 and the second die 32 facing each other in the horizontal direction. The case where the cavity defined by the mold 32 is not particularly restricted in the direction orthogonal to the horizontal direction is exemplified, but the cavity has a shape corresponding to the cover glass as a rectangular plate-like glass molded product to be manufactured. A frame-like protrusion may be provided on at least one of the first mold 31 and the second mold 32 so that the cavity is regulated in a direction orthogonal to the horizontal direction.

  Also in this case, the molten glass lump 51 adhering to the first mold 31 spreads wet instantly on the mold surface 31a of the first mold 31 due to the impact, and thereafter the mold surface 32a of the second mold 32 without delay. Since the molten glass lump 51 is pressurized by the second mold 32, the molten glass lump 51 has already been formed on the mold surface 31a of the first mold 31 before the molten glass lump 51 is expanded by the second mold 32. It becomes wet and spreads. Therefore, when the molten glass lump 51 is expanded by the second mold 32, a large difference is hardly generated in how the molten glass lump 51 is spread in a direction parallel to the mold surface, and as a result, at the corner of the cover glass. Occurrence of a problem that the transferability is lowered is less likely to occur.

  Therefore, even when configured in this way, it is possible to suppress variations in the quality of the manufactured rectangular plate-like cover glass, and easily and reliably have a mirror surface or a state close to that without performing a polishing process. The surface can be finished. In that case, the step of cutting unnecessary portions as described above is not necessary, and thus a rectangular plate-like cover glass can be manufactured more easily.

  Further, in the above, the case where the second mold 32 is moved toward the first mold 31 after the first mold 31 is stopped at the stop position P12 is exemplified. Can also be adopted. FIG. 9 is a diagram showing another example of the step of press molding by bringing the second mold into contact with the molten glass lump.

  As shown in FIG. 9, when the first mold 31 is moved toward the second mold 32 in order to bring the first mold 31 into contact with the molten glass block 51, the first mold at the stop position P12 described above. The first mold 31 may be moved as it is along the direction of the arrow D shown in FIG. 9 without stopping the mold 31, thereby causing the first mold 31 to approach the second mold 32. In that case, what is necessary is just to stop the 1st metal mold | die 31 in the predetermined stop position P13 in which the molten glass lump 51 can be pressure-molded between the stationary 2nd metal mold | dies 32. FIG.

  Even in such a configuration, the same effect as described above can be obtained, and it is not necessary to move the second mold 32 at the time of pressure molding, so that the apparatus configuration and its control operation are simplified. Can be

(Embodiment 2)
In the present embodiment, a molten glass lump that is cut from a molten glass flow and falls vertically downward using a pair of molds arranged to face each other along an oblique direction is pressure-molded, and after pressure molding The manufacturing example in the case of manufacturing a rectangular plate-shaped cover glass only by cutting and removing an unnecessary part, without grind-finishing a glass molded product is shown. The glass molded product manufacturing apparatus in the present embodiment is a pair of molds, a first mold and a second mold, when compared with the glass molded product manufacturing apparatus 1 in the first embodiment described above. Are different from each other only in the diagonal direction that is not parallel to both the vertical direction and the horizontal direction, and the other configurations are the same, and thus detailed description thereof is omitted here.

  FIG. 10 to FIG. 12 are diagrams for explaining the glass molded product manufacturing method according to the present embodiment, and FIG. 10 supplies a molten glass lump between the first mold and the second mold. The figure which shows a process, FIG. 11 is a figure which shows the back state of the process of making a 1st metal mold | die contact a molten glass lump, FIG. 12 is the process which press-molds by making a 2nd metal mold | die contact a molten glass lump. FIG. Hereinafter, with reference to these FIG. 10 thru | or FIG. 12, the manufacturing method of the glass molded product in this Embodiment is demonstrated. In addition, since the manufacturing method of the glass molded product in this Embodiment is fundamentally based on the manufacturing method of the glass molded product in Embodiment 1 mentioned above, this is also referred also about FIG.

  As described above, with reference to FIG. 10, in the present embodiment, a first mold 31 and a second mold 32 as a pair of molds are arranged in advance along an oblique direction. Referring to FIG. 2, even in the method for manufacturing a glass molded product in the present embodiment, first and second molds are first arranged to face each other as in the first embodiment (steps). S11) Next, the molten glass stream is cut (step S12).

  Next, as shown in FIG. 2, the molten glass lump is supplied between the first mold and the second mold (step S13). Specifically, as shown in FIG. 10, the molten glass lump 51 separated from the molten glass flow 50 by being cut by the cutter 21 falls based on gravity, and the first mold 31 and Moves vertically downward (in the direction of arrow B shown in FIG. 10) between the second mold 32. As a result, the molten glass block 51 is supplied between the first mold 31 and the second mold 32.

  Next, as shown in FIG. 2, a 1st metal mold | die is made to contact a molten glass lump (process S14). Specifically, as shown in FIG. 11, at a predetermined timing before and after the molten glass block 51 is supplied between the first mold 31 and the second mold 32, the first mold 31 is inclined. It is moved in the direction toward the second mold 32 (in the direction of arrow D shown in FIG. 11). As a result, the first mold 31 passes at least a part of the position below the outflow pipe 13 and stops at a predetermined stop position P12 determined in advance. At that time, the falling molten glass block 51 comes into contact with and adheres to the mold surface 31 a of the first mold 31.

  At this time, by quickly moving the first mold 31 at a predetermined moving speed, the molten glass lump 51 attached to the mold surface 31a of the first mold 31 spreads wet on the mold surface 31a due to the impact. become. For this reason, the molten glass instantaneously and substantially spreads along the direction parallel to the mold surface 31a, and high transferability can be obtained in the pressure molding process described later.

  Next, as shown in FIG. 2, pressure molding is performed by bringing the second mold into contact with the molten glass lump (step S15). Specifically, as shown in FIG. 12, at a predetermined timing before and after the first mold 31 is brought into contact with the molten glass lump 51, the second mold 32 is directed obliquely toward the first mold 31. (In the direction of arrow E shown in FIG. 12). Thereby, the 2nd metal mold | die 32 will approach the 1st metal mold | die 31, and will stop in the predetermined stop position P22 defined beforehand. At that time, the mold surface 32a of the second mold 32 comes into contact with the molten glass lump 51 after wetting and spreading on the mold surface 31a of the first mold 31, and the molten glass lump 51 is moved by the mold surface 32a. Pressurized and further expanded.

  The molten glass lump 51 spread out spreads into the cavity defined by the first mold 31 and the second mold 32, whereby the inside of the cavity is filled with the molten glass lump 51 and the molten glass lump 51. Is pressed at a predetermined pressure by the first mold 31 and the second mold 32, and the molten glass lump 51 is pressure-molded.

  Next, after a predetermined time has elapsed, as shown in FIG. 2, the pressure applied by the first mold and the second mold is released (step S16), and the manufactured glass molded product is replaced with the first mold and The mold is released from the second mold (step S17), and unnecessary portions of the glass molded product after the release are cut and removed (step S18). Thus, 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 in the present embodiment described above, the detailed description thereof is omitted here, but the above-described embodiment. As in the case of 1, it is possible to suppress variations in the quality of the rectangular plate-shaped cover glass as a glass molded article to be manufactured, and it is easily and reliably mirror-finished or close to that state without being subjected to polishing treatment. It becomes possible to finish the surface.

(Embodiment 3)
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 rectangular plate-like 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 1 in the first embodiment described above. Omitted.

  FIG. 13 is a diagram showing a flow of a method for manufacturing a glass molded product in the present embodiment. 14 to 19 are diagrams showing a predetermined process in the flow shown in FIG. 2 or a state after the predetermined process. Hereinafter, with reference to these FIG. 14 thru | or FIG. 19, the manufacturing method of the glass molded product in this Embodiment is demonstrated in order.

  First, as shown in FIG. 13, the first mold and the second mold are arranged to face each other (step S21), and a molten glass flow is supplied between the first mold and the second mold (step). S22). FIG. 14 is a diagram showing a state after the step of arranging the first mold and the second mold so as to face each other and a step of supplying a molten glass flow between the first mold and the second mold.

  Specifically, as shown in FIG. 14, the first mold 31 and the second mold 32 are such that the mold surfaces 31 a and 32 a that the first mold 31 and the second mold 32 have face each other through the position below the outflow pipe 13. Are arranged at predetermined initial positions P11 and P21, respectively. A molten glass flow 50 continuously flows out from the outlet 13a of the outflow pipe 13 vertically downward (in the direction of arrow A shown in FIG. 14), and the length of the molten glass flow 50 is proportional to time. And gradually become longer. Therefore, after a predetermined time has elapsed, the molten glass flow 50 reaches between the first mold 31 and the second mold 32, and vertically downward (in the direction of arrow A shown in FIG. 14) between these. Will move towards. As a result, the molten glass flow 50 is supplied between the first mold 31 and the second mold 32.

  Next, as shown in FIG. 13, the first mold is brought into contact with the molten glass flow (step S23). FIG. 15 is a view showing a state after the step of bringing the first mold into contact with the molten glass flow, and FIG. 16 shows a state of the molten glass flow after wetting and spreading on the mold surface of the first mold. FIG.

  Specifically, as shown in FIG. 15, at a predetermined timing after the molten glass flow 50 is supplied between the first mold 31 and the second mold 32, the first mold 31 is horizontal. It is moved in the direction toward the second mold 32 (in the direction of arrow D shown in FIG. 15). As a result, the first mold 31 passes through a position below the outflow pipe 13 and stops at a predetermined stop position P12 determined in advance. At that time, the molten glass flow 50 comes into contact with and adheres to the mold surface 31 a of the first mold 31.

  At this time, by quickly moving the first mold 31 at a predetermined moving speed, as shown in FIG. 16, the molten glass flow 50 attached to the mold surface 31a of the first mold 31 is affected by the impact. It spreads wet on the surface 31a. For this reason, the molten glass instantaneously and substantially spreads along the direction parallel to the mold surface 31a, and high transferability can be obtained in the pressure molding process described later. In addition, in FIG. 16, a mode that the molten glass spreads wet on the mold surface 31a is schematically indicated by an arrow AR.

  Here, the size of the molten glass flow 50 after wetting and spreading on the mold surface 31a of the first mold 31 is the product molding surface of the mold surface 31a (i.e., the region that becomes the product of the glass molded product). However, it is preferable that each of the vertical and horizontal widths of the product molding surface of the first mold 31 is 70% or more. Note that the size of the molten glass flow 50 after wetting and spreading can be controlled by adjusting the amount of the molten glass flow 50 and the moving speed of the first mold 31.

  Next, as shown in FIG. 13, pressure molding is performed by bringing the second mold into contact with the molten glass flow (step S24). FIG. 17 is a diagram showing a step of pressure molding by bringing the second mold into contact with the molten glass flow.

  Specifically, as shown in FIG. 17, at a predetermined timing before and after the first mold 31 is brought into contact with the molten glass flow 50, the second mold 32 is directed toward the first mold 31 in the horizontal direction. (In the direction of arrow E shown in FIG. 17). Thereby, the 2nd metal mold | die 32 will approach the 1st metal mold | die 31, and will stop in the predetermined stop position P22 defined beforehand. At that time, the mold surface 32a of the second mold 32 comes into contact with the molten glass flow 50 after wetting and spreading on the mold surface 31a of the first mold 31, and the molten glass flow 50 is caused by the mold surface 32a. Pressurized and further expanded.

  The expanded molten glass stream 50 is distributed into the cavity defined by the first mold 31 and the second mold 32, whereby the cavity is filled with the molten glass stream 50, and the molten glass stream 50 is filled. Is pressed at a predetermined pressure by the first mold 31 and the second mold 32, and the molten glass flow 50 is pressure-molded.

  Here, the time from when the molten glass lump 51 is brought into contact with the mold surface 31a of the first mold 31 to when the molten glass lump 51 is brought into contact with the mold surface 32a of the second mold 32 is the same as that of the first embodiment. As in the case of, it is preferably 0.02 [second] or more and 0.5 [second] or less. Further, the state in which the molten glass flow 50 is pressurized by the first mold 31 and the second mold 32 is maintained for a predetermined time as in the case of the above-described first embodiment. In addition, the molten glass is cured in a state where the shapes of the mold surface 31a of the first mold 31 and the mold surface 32a of the second mold 32 are transferred, thereby forming a glass molded product.

  Next, as shown in FIG. 13, the molten glass flow is cut (step S25). FIG. 18 is a diagram illustrating a state after the step of cutting the molten glass flow.

  Specifically, as shown in FIG. 18, the molten glass flow 50 is cut by the cutter 21 during the pressure molding or at the time when the pressure molding is completed. As a result, the uncured portion of the molten glass flow 50 is separated from the portion including the glass molded product that is pressure-molded by the first mold 31 and the second mold 32.

  Next, as shown in FIG. 13, the pressurization by the first mold and the second mold is released (step S26), and the manufactured glass molded product is released from the first mold and the second mold. (Step S27), unnecessary portions of the glass molded product after mold release are cut and removed (Step S28). Thus, the production of the cover glass is completed. FIG. 19 is a diagram illustrating a process of cutting a glass molded product.

  Here, the front and back surfaces of the glass molded product after mold release are both formed into a mirror surface or a state close thereto by the above-described pressure molding. Therefore, as an additional process required after the pressure molding, the unnecessary portion 60a shown in FIG. 19 is cut and removed along the cutting line F so that the glass molded product has a rectangular plate shape. It is only necessary to cut and remove the peripheral part (the peripheral part also corresponds to an unnecessary part) of the pressure-molded glass molded product 60 including the processing to be performed, and a polishing process for polishing and finishing the front and back surfaces is necessary. And not.

  Even when the cover glass is manufactured using the glass molded product manufacturing method and manufacturing apparatus in the present embodiment described above, the detailed description thereof is omitted here, but the above-described embodiment. As in the case of 1, it is possible to suppress variations in the quality of the rectangular plate-shaped cover glass as a glass molded article to be manufactured, and it is easily and reliably mirror-finished or close to that state without being subjected to polishing treatment. It becomes possible to finish the surface.

(Embodiment 4)
This embodiment press-molds a molten glass lump that is cut from a molten glass flow and falls vertically downward using a pair of molds arranged to face each other in the horizontal direction, and after the pressure molding The example of manufacture in the case of manufacturing a substantially box-shaped cover glass without grind-finishing a glass molded product is shown. In addition, since the manufacturing method of the glass molded product in this Embodiment is based on the manufacturing method of the glass molded product in Embodiment 1 mentioned above, the detailed description is abbreviate | omitted here.

  FIG. 20 is a diagram illustrating a process of supplying a molten glass lump between the first mold and the second mold in the method for manufacturing a glass molded product according to the present embodiment. As shown in FIG. 20, in the apparatus for manufacturing a glass molded product according to the present embodiment, a first mold 31 including a mold surface 31 a having a convex shape is used as a second mold 32. In this case, one including a mold surface 32a having a concave shape is used. The first mold 31 and the second mold 32 constitute a cavity having a shape corresponding to a substantially box-shaped cover glass as a glass molded product in a state where the first mold 31 and the second mold 32 are arranged close to each other for pressure molding. .

  As shown in FIG. 20, also in the manufacturing method of the glass molded product in this Embodiment, between the 1st metal mold | die 31 and the 2nd metal mold | die 32, it heads vertically downward (arrow B direction shown in FIG. 20). The molten glass block 51 is supplied so as to fall, and the mold surface 31 a of the first mold 31 is brought into contact with the molten glass block 51 by moving the first mold 31 toward the second mold 32. The molten glass lump 51 is instantaneously wetted and spread on the mold surface 31a of the first mold 31 by impact, and then the molten glass lump 51 is pressurized by the mold surface 32a of the second mold 32 without delay, thereby forming a glass molded product. Is pressed.

  Even in such a configuration, detailed description thereof is omitted here, but the quality of the substantially box-shaped cover glass as a glass molded product to be manufactured varies as in the case of the first embodiment described above. Can be suppressed, and the surface can be finished in a mirror-like or close state easily and reliably without performing a polishing process.

  In the embodiment of the present invention described above, the case where a pair of molds is used as a mold for press-molding molten glass has been described as an example, but the number of molds is limited to this. Instead of the above, pressure molding may be performed using three or more molds.

  Moreover, in embodiment of this invention mentioned above, although the cover glass with which a smart phone and a tablet terminal were equipped was illustrated and demonstrated as a glass molded article manufactured by applying this invention, it is limited to this. For example, the present invention may be applied to the manufacture of cover glasses for other display devices, and the manufacture of exterior covers for electronic devices such as mobile computers and digital cameras. The present invention may be applied to the manufacture of an optical recording medium.

  In addition, the individual characteristic configurations shown in the above-described embodiments of the present invention can naturally be combined with each other without departing from the spirit of the present invention.

  Thus, the above-described embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus, 10 Material supply part, 11 Continuous melting furnace, 12 Nozzle part, 13 Outflow pipe, 13a Outlet, 20 Cutting part, 21 Cutter, 22 Cutter drive mechanism, 30 Molding part, 31 1st metal mold, 31a type Surface, 32 second mold, 32a mold surface, 33 first mold drive mechanism, 34 second mold drive mechanism, 40 control unit, 50 molten glass flow, 51 molten glass lump, 60 glass molded product, 60a unnecessary part .

Claims (9)

Disposing the first mold and the second mold opposite to each other along a direction intersecting the vertical direction;
Supplying molten glass to move vertically downward between the first mold and the second mold; and
By moving the first mold toward the second mold along a direction intersecting with the vertical direction, the first mold is moved vertically downward between the first mold and the second mold. Contacting the molten glass with the mold surface of the first mold, and spreading the molten glass on the mold surface of the first mold by impact;
The molten glass is pressed by the first mold and the second mold by bringing the mold surface of the second mold into contact with the molten glass after wetting and spreading on the mold surface of the first mold. The manufacturing method of a glass molded product provided with the process to shape | mold.   The time from contact of the molten glass with the mold surface of the first mold to contact of the molten glass with the mold surface of the second mold is 0.02 [second] or more and 0.5 [second] or less. The manufacturing method of the glass molded product of Claim 1 which exists.   The manufacturing method of the glass molded product of Claim 1 or 2 with which the said 1st metal mold | die and the said 2nd metal mold | die are opposingly arranged along a horizontal direction.   The manufacturing method of the glass molded product of Claim 1 or 2 with which the said 1st metal mold | die and the said 2nd metal mold | die are opposingly arranged along the diagonal direction which is not parallel in any of a perpendicular direction and a horizontal direction. .   The manufacturing method of the glass molded product in any one of Claim 1 to 4 whose molten glass which moves toward the vertically downward direction is a molten glass lump which falls toward the vertically downward direction.   The manufacturing method of the glass molded product in any one of Claim 1 to 4 whose molten glass which moves toward the vertically downward direction is a molten glass flow which moves continuously toward the vertically downward direction.   The method further includes a step of cutting a molten glass flow outside the first mold and the second mold after the start of pressure molding by the first mold and the second mold. The manufacturing method of the glass molded article of description. Releasing a glass molded product obtained by pressure-molding molten glass with the first mold and the second mold from the first mold and the second mold;
The manufacturing method of the glass molded product in any one of Claim 1 to 7 further equipped with the process of cut | disconnecting and removing the unnecessary part of the glass molded product after mold release. A first mold and a second mold disposed opposite to each other along a direction intersecting the vertical direction;
A molten glass supply unit for supplying molten glass so as to move vertically downward between the first mold and the second mold;
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 control unit moves vertically downward between the first mold and the second mold by moving the first mold toward the second mold along a direction intersecting the vertical direction. The molten glass moving toward the mold is brought into contact with the mold surface of the first mold, and the molten glass is wetted and spread on the mold surface of the first mold by the impact, and then the mold surface of the first mold The drive mechanism is configured to press the molten glass by the first mold and the second mold by bringing the mold surface of the second mold into contact with the molten glass after wetting and spreading on the top. A glass molded product manufacturing device that controls the operation of

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