WO2012169371A1 - ガラス成形品の成形装置 - Google Patents
ガラス成形品の成形装置 Download PDFInfo
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- WO2012169371A1 WO2012169371A1 PCT/JP2012/063438 JP2012063438W WO2012169371A1 WO 2012169371 A1 WO2012169371 A1 WO 2012169371A1 JP 2012063438 W JP2012063438 W JP 2012063438W WO 2012169371 A1 WO2012169371 A1 WO 2012169371A1
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- WIPO (PCT)
- Prior art keywords
- mold
- molding
- press
- molded product
- release
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/44—Removing or ejecting moulded articles
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/10—Die base materials
- C03B2215/11—Metals
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/10—Die base materials
- C03B2215/12—Ceramics or cermets, e.g. cemented WC, Al2O3 or TiC
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/16—Metals or alloys, e.g. Ni-P, Ni-B, amorphous metals
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/16—Metals or alloys, e.g. Ni-P, Ni-B, amorphous metals
- C03B2215/17—Metals or alloys, e.g. Ni-P, Ni-B, amorphous metals comprising one or more of the noble meals, i.e. Ag, Au, platinum group metals
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/24—Carbon, e.g. diamond, graphite, amorphous carbon
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/68—Means for parting the die from the pressed glass other than by cooling or use of a take-out
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Definitions
- the present invention relates to a glass molding product molding apparatus that can efficiently press-mold a glass molding product, and in particular, prevents the molding die and the glass material from sticking after pressing, and smoothly separates the glass material.
- the present invention relates to an apparatus for molding a glass molded product that can be molded to improve productivity.
- a molding apparatus provided with a configuration to do this.
- a molding device provided with a spring and a release ring (see Patent Document 1), a release ring, a connecting member, and a drive device are provided in the upper die of the molding die so that a force to separate after press molding can be applied.
- a mold release device for a glass forming device in which these are arranged almost symmetrically with respect to a mold axis is known.
- the spring is integrated with the upper die, and in the invention using the elastic force of the spring, the spring is heated together with the upper die to a high temperature close to the molding temperature by press molding. Therefore, there is a problem that the spring characteristics are deteriorated due to heat.
- a release ring, a connecting member, and a drive device must be provided as members for the release device, and since these are provided on the outer periphery of the upper die of the molding device, the release device has a large size. Since the apparatus is a mold release apparatus as a separate apparatus, the structure of the apparatus is complicated and there are many parts, and the apparatus is not simple.
- the present invention has been made paying attention to the above problems, and in the production of a glass molded product, the glass material provided with a molding surface shape by press molding is forcibly separated from the upper mold, and the glass material is adhered. Therefore, it is an object of the present invention to provide a glass molded product molding apparatus that can efficiently prevent the stoppage of an unplanned system and efficiently manufacture a glass molded product. Furthermore, it aims at providing the shaping
- the present inventor has found that the above problems can be solved by the glass molding product molding apparatus of the present invention, and has completed the present invention.
- the glass molding product molding apparatus of the present invention press-molds a glass material placed on the lower die by pressing a molding die composed of an upper die and a lower die arranged between upper and lower press plates with a press shaft, and presses An apparatus for molding a glass molded article having mold release means for releasing the glass material from the mold later, wherein the mold release means is provided in a guide hole provided through the upper press plate and the upper mold.
- a release member having a lower end faced to the outer peripheral portion of the molding surface of the lower mold, a mold release operation providing mechanism provided by protruding from a press shaft to which the upper press plate is fixed, and an upper part And a push rod that can be moved up and down by the release action applying mechanism and can adjust a downward pressure applied to the release member. And lower mold When to be between, and wherein the moving the push rod and the releasing member with respect to the press axis downwards.
- the press-molded glass material can be surely released from the upper mold, and the number of stoppages of the system due to insufficient release can be eliminated.
- the glass molded product molding apparatus incorporating the mold release means of the present invention can be of the same size as a conventional press molding apparatus, and there are many places where conventional parts can be used, maintaining space saving and cost. It is possible to suppress the increase of.
- FIG. 1 is a side view showing a schematic configuration of a glass molded product forming apparatus according to an embodiment of the present invention, and a part thereof is shown as a perspective view (dashed line portion).
- 2A to 2E are side sectional views for explaining the operation of the release member during press molding. 2A to 2E show side sectional views (partial side views) of the right half of the molding apparatus 1 for a glass molded product shown in FIG.
- a molding apparatus 1 for a glass molded product according to the present invention includes a molding die composed of an upper die 2 and a lower die 3 for press-molding a glass material, and an upper die 2 for moving the upper die 2 up and down in order to press the molding die.
- the present invention has the same configuration as that of a general press molding apparatus except that it relates to the mold release means described later.
- the molding die composed of the upper die 2 and the lower die 3
- a glass material to be a molded product is used.
- the forming operation is performed by sandwiching and pressing.
- the upper mold 2 forms an upper molded product shape
- the lower mold 3 forms a lower molded product shape.
- the upper mold 2 and the lower mold 3 may be formed of a material that can stably give a molded product shape by press molding, for example, a material such as cemented carbide, ceramics, SUS, etc., under a high temperature environment during press molding, Cemented carbide and ceramics are preferred so that they do not easily deform even under high pressure.
- the surfaces of the lower mold 2 and the upper mold 3 are adhered to the molded product and the mold after press molding, such as a noble metal film such as Ir-Re, a carbon film such as DLC, and a plating film such as Cr. It is preferable to provide a release film to be suppressed.
- the molding surface of the upper mold 2 and the lower mold 3 is a shape corresponding to the shape of the molded product, but the specific shape is not particularly limited, and any shape can be used as long as it can be manufactured by press molding. Good.
- an optical element, various housings made of glass, jewelry made of glass and the like can be mentioned.
- a shape corresponding to the mold release means 5 described later is provided on the outer peripheral portion of the molding surface of the upper mold 2.
- a guide hole 9 through which other members are also inserted is provided inside the guide hole 9, the release member 5a is provided.
- a holding portion 2a is provided with a step so as to project and hold the lower end surface of the upper die 2 below the outer peripheral surface of the molding surface of the upper die 2.
- a part of a tip portion of a release member 5 a described later is brought into contact with and locked to the edge of the lower mold 3 at the time of pressing.
- a restricting portion 3a is provided for restricting the end surface so that the end surface is as high as the outer peripheral surface of the upper mold surface or higher than the outer peripheral surface of the molding surface.
- free insertion means a state of being inserted with a sufficient space
- molding surface outer peripheral surface refers to the contour shape of the molding surface when viewed in plan. Also refers to the surface of the outer periphery.
- a press shaft having a function of moving up and down at least one of the upper mold 2 and the lower mold 3 to approach and separate is provided.
- the press shaft 4 that moves the upper mold 2 up and down is described.
- the lower die 3 may be fixed, or may be moved up and down by a press shaft in the same manner as the upper die 2.
- the press shaft is connected to a cylinder (not shown) so that the press shaft and members fixed thereto can be moved up and down integrally.
- the cylinder is only required to move up and down each plate.
- a cylinder such as an electric servo cylinder, a hydraulic cylinder, and an electric hydraulic cylinder can be used.
- the press shaft 4 is provided with a mold release means 5 which will be described later and protrudes from the shaft.
- the mold release means 5 is It is not always necessary to provide the press shaft 4.
- the mold release means 5 After the pressing, the mold release means 5 has a release member 5a that directly contacts the lower end surface of the glass material to apply a downward force to the glass material, and a downward pressure that directly contacts the release member 5a and moves up and down. And a spring member 5c, which is a releasing action imparting mechanism for moving the push bar 5b downward with respect to the press shaft 4 at a predetermined timing.
- the mold release means 5 configured in this way is held so that its lower end surface (the lower end surface of the release member 5a) can protrude below the outer peripheral surface of the upper mold 2 on the outer periphery of the upper mold 2 Thus, it faces the outer periphery of the molding surface of the lower mold 3.
- the lower end surface of the release member 5a is the same as the outer peripheral surface of the molding surface of the upper mold 2 so that the lower end surface does not come into contact with the glass material extruded to the outer peripheral surfaces of the upper die 2 and the lower die 3 during pressing. It is regulated to be higher than a certain height or the outer peripheral surface of the molding surface.
- “being facing the outer periphery of the molding surface of the lower mold 3” means that the releasing means 5 is disposed above the outer peripheral surface of the molding surface of the lower mold 3.
- the tip of the release member 5a is in contact with the restricting portion 3a of the lower mold 3 above the lower end surface so that the release member 5a does not move further downward.
- a flat surface serving as a stop is provided.
- a flat surface serving as a held portion is provided above the locking portion so as to be in contact with the holding portion 2a in the through hole of the upper mold 2 and to be held at a predetermined position. That is, the release member 5a is provided with a lower end surface, a flat surface serving as a locking portion, and a flat surface serving as a held portion, each having a stepped shape. The operation relating to this structure will be described later in detail.
- the spring member 5c is provided as a release operation imparting mechanism.
- this is an example, and a function that can apply a downward force to the press shaft 4 at a predetermined timing. If it has, it will not specifically limit.
- the push rod 5b and the release member 5a may be exemplified by an actuator such as an electric cylinder or an air cylinder that can be moved downward with respect to the press shaft at a predetermined timing with respect to the vertical movement of the press shaft 4. it can. If the said function is ensured at this time, you may provide a mold release operation
- the spring member 5c extends from the press shaft 4, and has a support arm 5c-1 having a guide hole in which the push bar 5b can be freely inserted in the vertical direction at the tip.
- a flange 5c-2 provided below the support arm 5c-1 and fixed to the push bar 5b, and a coil spring 5c-3 interposed between the support arm 5c-1 and the flange 5c-2, , Is composed of.
- the push bar 5b is moved downward by the spring member 5c so that force is applied to the release member 5a, but the held portion of the release member 5a contacts the upper mold holding portion 2a. Therefore, it is normally held at a predetermined position. At this time, the lower end surface of the release member 5a protrudes below the outer peripheral surface of the molding surface of the upper mold 2.
- the tip of the release member 5a is provided with a locking portion that comes into contact with the lower restricting portion 3a at the time of pressing.
- the release member 5a Before pressing, the release member 5a is pressed against the release member 5a. An upward force is applied by contact with the restricting portion 3a.
- the position of the release member 5a does not change, but the press shaft 4 is moved downward and pushed, so that the release member 5a and the push bar 5b move relatively upward with respect to the press shaft 4. It becomes. Since the relative position changes in this way, the coil spring 5c-3 is compressed and the elastic force is increased.
- the restricting portion 3a has a lower end surface of the release member 5a that is approximately the same as the outer peripheral surface of the molding surface of the upper die 2 so as not to come into contact with the glass material that is extruded to the outer periphery of the upper die 2 and the lower die 3 during pressing. It regulates so that it may become higher than the height or the molding surface outer peripheral surface.
- the upper and lower press plates 6 and 7 are plates for holding the upper die 2 and the lower die 3 and performing stable press molding, respectively. By reducing the distance between the press plates 6 and 7, the upper die 2 The glass material placed on the molding surface of the lower mold 2 is pressed and deformed while being softened, and the molding surface shape of the upper mold and the lower mold is changed to the glass material. Transfer to a glass molded product.
- the upper and lower press plates 6 and 7 are each provided with a cartridge heater so that the upper die 2 and the lower die 3 can be heated and held at a press temperature by being in contact with each other.
- the upper and lower press plates 6 and 7 are respectively fixed to the upper die 2 and the lower die 3 and heated from the room temperature to the press temperature, and the glass material is pressed in the heated state.
- the upper mold 2 and the lower mold 3 and the pressed glass material may also be cooled, and a device capable of a series of press molding with uniaxial fixing may be used.
- a series of operations of heating, pressing, and cooling are performed on different plates (heating plate, press plate, cooling plate), and press molding is performed by sequentially moving the molding die on each plate.
- a mold moving type molding apparatus may be used. At this time, it is preferable that the lower mold 3 on which the glass material is placed is sequentially moved to each stage, and the upper mold 2 is fixed to the upper press plate.
- the mold release means described in the present invention at the timing of releasing the upper mold 2 and the glass material. What is necessary is just the structure which has.
- the press plates 6 and 7 are made by inserting and fixing a cartridge heater in a material such as stainless steel, cemented carbide, alloy steel, etc., and heating the cartridge heater to increase the temperature of the plate. Can be maintained at temperature.
- the heat insulating plate 8 is a member for preventing the heat of the press plate 6 from being directly transferred to the press shaft 4 side, and a known heat insulating plate such as ceramics, stainless steel, die steel, high speed steel or the like is used. Among these, ceramics that have high hardness and are not easily deformed by pressure during press molding or the like, and are less likely to cause displacement, are preferable. When die steel or high-speed steel is used, it is preferable that the surface is coated with CrN, TiN, or TiAlN.
- the lower mold 3 in which the glass material 50 is placed on the molding surface is placed in the molding apparatus 1 for the glass molded product (FIG. 2A).
- the glass molding product molding apparatus 1 is a uniaxially fixed molding apparatus
- the glass material 50 is placed on the molding surface of the lower mold 3 fixed to the press plate 7 with the apparatus itself at a sufficiently low temperature.
- the press plate 7 is heated by the cartridge heater.
- the glass material 50 is heated to a temperature above the softening point, deformation is facilitated. Therefore, the glass material 50 is heated to a temperature higher than the softening point and then a press operation is performed.
- the temperature is raised, a phenomenon such as clouding of the surface appears, so the temperature is set between the yield point (At) and the softening point.
- the rate of temperature rise is preferably about 5 to 300 ° C./min, and more preferably about 30 to 300 ° C./min.
- a heater for heating the glass material 50 itself may be provided. Then, after the glass material 50 is sufficiently heated, the next operation is started.
- the heating stage, the press stage, and the cooling stage are known, and the glass processing shown here is performed.
- the molded product molding apparatus 1 shows a configuration of a press stage.
- the glass material 50 is placed on the lower mold 3 in advance outside the apparatus, and this is integrally conveyed to the inside of the apparatus, and conveyed to the heating stage, press stage, and cooling stage in order. I do. Therefore, the glass material 50 and the lower mold 3 sufficiently heated by the heating stage are conveyed as they are onto the press plate 7, and the state shown in FIG. 2A is obtained.
- the upper die 2 is fixed to the press plate 6 and sufficiently heated so that the press operation can be performed.
- the press plate 7 is also heated so that it can be immediately pressed without lowering the temperature of the lower mold 3 that has been conveyed.
- the mold release means 5 is inserted such that the push bar 5b is loosely inserted from above into the heat insulating plate 8 and the guide hole 9 provided in the press plate 6, and the lower end surface of the push bar 5b is released. It is in contact with the upper part of the mold member 5a.
- the mold release member 5a is held by a holding portion 2a provided in the guide hole 9 of the upper mold 2 and is not lowered further.
- the push bar 5b is given a downward force by the spring member 5c. At this time, the release member 5a is lightly pressed against the holding portion 2a by the push bar 5b.
- the tip portion of the release member 5a is formed in a stepped shape having a lower end surface, a locking portion, and a held portion, each having a step, and the lower end surface is a molding surface of the upper mold 2 It protrudes downward from the outer peripheral surface.
- the upper die 2 and the lower die 3 are brought close to each other.
- the lower press plate 7 is fixed, and the upper press plate 6 is connected to the press shaft 4 via the heat insulating plate 8.
- the upper mold 2 is fixed to 6. Therefore, when the press shaft 4 is moved up and down, the upper press plate 6 and the upper mold 2 are also moved up and down integrally to perform the pressing operation.
- the locking portion of the release member 5a is the lower die. 3, the release member 5 a is further restricted so as not to move downward (FIG. 2B).
- the release member 5a cannot be lowered any more as described above, and is regulated at that position.
- the member fixed to the press shaft 4 moves further downward, presses the glass material 50, and the molding surface shapes of the upper mold 2 and the lower mold 3 are transferred to the glass material 50.
- the lower end portion of the coil spring 5c-3 of the spring member 5c is fixed, and the upper end portion is pressed downward by the press shaft 4, so that it is compressed and the elastic force is increased (FIG. 2C).
- the release member 5a is regulated and the upper die 2 is further lowered, so that the lower end surface of the release member 5a is at the same level or higher than the outer peripheral surface of the molding surface of the upper die 2.
- the release member 5a moves relatively upward with respect to the other members, and this does not hinder the movement of the surplus glass material 50a that is pushed out to the outer periphery of the molding surface of the pressed glass material 50. That is, the surplus glass material 50a will sink under the release member 5a (FIG. 2C).
- the temperature of the upper and lower press plates 6 and 7 is lowered, and the formed glass material 50 is cooled and solidified.
- This cooling is preferably performed at a temperature below the glass transition point (Tg) of the glass material, and more preferably at a temperature below the strain point of the glass material.
- the temperature lowering rate is preferably about 5 to 150 ° C./min, more preferably about 15 to 150 ° C./min.
- the upper mold 2 When the glass material 50 is sufficiently cooled, the upper mold 2 is raised by the press shaft 4 and the upper mold 2 and the lower mold 3 are separated from each other. At this time, the pressed glass material 50 may be released naturally, but is often stuck to the upper die 2. In the present embodiment, even when the glass material 50 is attached to the upper mold 2, the excess glass material 50 a pushed out to the outer periphery of the molding surface immediately after raising the upper mold 2 is below the release member 5 a. Contact the end face (FIG. 2D).
- the release member 5a When the upper die 2 is further raised, the release member 5a is not sufficiently released from the compression of the spring member 5c by the push bar 5b, so that the force to move downward relative to the press shaft 4 and the upper die 2 is increased. It gradually protrudes from the outer peripheral surface of the molding surface of the upper mold 2. And this mold release member 5a provides the force which pushes down with respect to the glass raw material 50a, the glass raw material 50 whole is pulled apart from the upper mold
- the held portion of the release member 5a comes into contact with the holding portion 2a of the upper die 2 again, and then rises together with the upper die 2 to reach the state shown in FIG. 2A.
- the molded glass material 50 is taken out and subjected to a predetermined treatment to obtain a glass molded body as a final product.
- the force that separates the glass material from the mold is applied by the force of contact between the lower end surface of the release member 5a and the surplus glass material 50a.
- the number of release means is preferably 2 or more so that a force for releasing the mold as evenly as possible acts on the molded product.
- the arrangement of the releasing means is preferably a position that is symmetric with respect to the plane center of the molded product.
- the release member 5a may be provided as a release means at a position where the push bar 5b is provided.
- the release member 5a may be provided only on the push bar 5b portion or may include the push rod 5b portion. You may provide in the similar shape of this planar shape along the outer periphery of a planar shape. At this time, the release member is provided one size larger than the molded product, and has a size enough to be caught by a surplus glass material that is pushed out to the outer periphery during pressing. And this mold release member may be a shape with a part of the similar shape missing. For example, when the planar shape is a rectangular housing, one of the four sides or two opposite sides are It is good also as a structure which provides the release member which contacts the whole edge
- the apparatus for molding a glass molded body of the present invention can be widely used in the field of press molding because the mold and the glass material, which are essential when producing a glass molded body by press molding, can be reliably released.
- SYMBOLS 1 Molding apparatus of a glass molded object, 2 ... Upper mold
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Abstract
Description
したがって、特許文献1の発明は、離型を効果的に行うためにはばねの交換が避けられず、必ずしも生産性や作業性を向上させるものではなかった。
この上型2および下型3が有する成形面は、成形品形状に対応した形状とされるが、その具体的形状は特に限定されず、プレス成形により製造できる形状であればどのような形状でもよい。例えば、光学素子、ガラス製の種々の筐体、ガラス製の宝飾品等が挙げられる。
なお、離型部材5aとしては、上記説明したように離型手段として押し棒5bのある位置に設ければよく、押し棒5b部分にのみ設けても、押し棒5b部分も含め、成形品の平面形状の外周に沿って、該平面形状の相似形状に設けていてもよい。このとき、離型部材は成形品よりも一回り大きく設け、プレス時に外周部に押し出される余ったガラス素材に引っ掛かる程度の大きさとする。そして、この離型部材は、相似形状の一部欠けた形状としてもよく、例えば、平面形状が長方形の筐体であった場合、その4辺あるうちの1辺や対向する2辺に、その辺全体に接触する離型部材を設け、それ以外の辺には離型部材を設けない構成としてもよい。この場合、押し棒5bはその辺の中央部に1つ設けたり、その辺の両端付近に2つ設けたり、さらにそれ以上の押し棒を設けたりしてもよく、離型部材全体に対してほぼ同じタイミングで下方に圧力を付与できればよい。
Claims (7)
- 上下プレスプレート間に配置した上型および下型からなる成形型をプレス軸により押圧して下型上に配置したガラス素材をプレス成形し、プレス後に前記ガラス素材を前記成形型から離型させる離型手段を有するガラス成形品の成形装置であって、
前記離型手段が、前記上プレスプレートおよび前記上型を貫通して設けた案内孔に遊挿するとともに、下端面を前記下型の成形面外周部に臨ませた離型部材と、前記上プレスプレートを固定したプレス軸から張り出させて設けられた離型動作付与機構と、上部が前記離型動作付与機構に上下動可能に保持され、前記離型部材に付与する下方への圧力を調節できる押し棒と、からなり、
前記離型動作付与機構が、プレス後、前記上型および下型を離間させる際、前記プレス軸に対して前記押し棒及び前記離形部材を下方へ移動させることを特徴とするガラス成形品の成形装置。 - 前記離型動作付与機構が、前記プレス軸から張り出され、その先端に上下方向に前記押し棒を遊挿できる案内孔を有する支持腕と、前記押し棒の前記支持腕よりも下方に設けられたフランジと、前記支持腕と前記押し棒のフランジ間に介挿されたコイルばねと、から構成される請求項1記載のガラス成形品の成形装置。
- 前記離型部材の先端部分に、前記離型部材の下端面が前記上型の成形面外周面よりも下方に突出するように上型に保持される被保持部と、前記プレス軸が前記コイルばねの弾撥力に抗して下降する際、前記離型部材が前記下型の縁部に係止されて、その下端面が前記上型の成形面外周面と同程度の高さまたは成形面外周面よりも高くなるように規制する係止部と、を設けた請求項2記載のガラス成形品の成形装置。
- 前記離型動作付与機構が、アクチュエーターである請求項1記載のガラス成形品の成形装置。
- 前記離型動作付与機構が、エアシリンダーである請求項1記載のガラス成形品の成形装置。
- 前記離型部材が、成形品の平面中心に対して点対称となる位置に2以上設けられている請求項1乃至5のいずれか1項記載のガラス成形品の成形装置。
- 前記離型部材が、成形品の平面形状の外周に沿って、該平面形状と相似形状に設けられている請求項1乃至6のいずれか1項記載のガラス成形品の成形装置。
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