JP2020158338A - Metal mold device and method of manufacturing glass article - Google Patents
Metal mold device and method of manufacturing glass article Download PDFInfo
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本発明は、金型装置及びガラス物品の製造方法に関する。 The present invention relates to a mold device and a method for manufacturing a glass article.
従来、ガラス物品の製造方法としては、例えば、特許文献１に開示されているように、金型を用いて溶融ガラスの塊（ガラスゴブ）をプレス成形する方法が知られている。特許文献１に開示される金型は、凹部を含むプレス面を有し、この金型を用いることで、底面に凸部を有するガラス物品を製造することができる。このような金型を用いてガラス物品を製造する際に、プレス面の凹部内に空気が封じ込まれることを防止するために、凹部内に空気抜き孔が形成されている。 Conventionally, as a method for manufacturing a glass article, for example, as disclosed in Patent Document 1, a method of press-molding a block of molten glass (glass gob) using a mold is known. The mold disclosed in Patent Document 1 has a pressed surface including a concave portion, and by using this mold, a glass article having a convex portion on the bottom surface can be manufactured. When manufacturing a glass article using such a die, an air vent hole is formed in the recess in order to prevent air from being trapped in the recess on the press surface.
上記従来の金型におけるプレス面の凹部のように、空気等の気体を排出する気体排出路を有する場合、凹部内の気体排出路にガラスが流入することで、ガラス物品には、気体排出路の形状に沿って比較的大きな突起が形成される場合がある。このような比較的大きな突起や突起が欠けた痕跡は、ガラス物品の外観品位を低下させる一因となり得る。 When a gas discharge path for discharging a gas such as air is provided like the recess on the press surface of the conventional mold, the glass flows into the gas discharge path in the recess, so that the glass article has a gas discharge path. Relatively large protrusions may be formed along the shape of. Such relatively large protrusions or traces of missing protrusions can contribute to the deterioration of the appearance quality of the glass article.
本発明は、こうした実情に鑑みてなされたものであり、その目的は、外面に凸部を有するガラス物品の外観品位を容易に高めることのできる金型装置、及びガラス物品の製造方法を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a mold device capable of easily improving the appearance quality of a glass article having a convex portion on an outer surface, and a method for manufacturing the glass article. There is.
上記課題を解決する金型装置は、凹部を含むプレス面を有する金型を備え、ガラスのプレス成形に用いられる金型装置であって、前記金型は、前記凹部内の気体を排出する気体排出路を有し、前記気体排出路は、前記凹部内に開口し、前記凹部内の気体を流入する流入口を有し、前記金型装置は、前記気体排出路内に配置される先端部を有する軸状部材をさらに備え、前記軸状部材の前記先端部は、前記気体排出路の前記流入口側の端部において前記気体排出路の内壁面から離間させて配置される。 The mold device for solving the above problems includes a mold having a press surface including a recess, and is a mold device used for press molding of glass. The mold is a gas that discharges gas in the recess. The gas discharge path has a discharge path, the gas discharge path is opened in the recess, and the inlet has an inflow port for gas in the recess, and the mold device is a tip portion arranged in the gas discharge path. The tip of the shaft-shaped member is further provided, and the tip portion of the shaft-shaped member is arranged at the end of the gas discharge path on the inlet side so as to be separated from the inner wall surface of the gas discharge path.
この構成によれば、金型装置の軸状部材における先端部を、気体排出路の流入口側の端部において気体排出路の内壁面から離間させて配置することで、軸状部材の先端部の外周面と、気体排出路の内壁面との間に比較的狭い流路を形成することができる。これにより、金型のプレス面の凹部に充填されたガラスが気体排出路内に入り込むことを抑えることができる。このため、ガラス物品の凸部の表面に金型の気体排出路を要因とする不要な突起が形成され難くなる。なお、気体排出路自体の径を小さくすることにより狭い流路を形成することも可能であるが、上記の構成と比較して相対的に流路の総面積が小さくならざるを得ず、気体の排出を行い難くなる。上記の構成によれば、比較的狭い流路としながら、凹部内の気体を効率的に気体排出路に流入させることができるだけの流路の総断面積を確保し易く、かつガラス物品に不要な突起が形成され難い。また、軸状部材の先端部が気体排出路から離間されていることにより、軸状部材の先端部の熱を、気体排出路を介して外部に放出できるため、軸状部材の先端部は、金型装置の他の部分よりも温度が低くなり、ガラスを冷却する効果を高めることができる。 According to this configuration, the tip of the shaft-shaped member of the mold device is arranged at the end of the gas discharge path on the inflow port side so as to be separated from the inner wall surface of the gas discharge path, so that the tip of the shaft-shaped member is arranged. A relatively narrow flow path can be formed between the outer peripheral surface of the gas discharge path and the inner wall surface of the gas discharge path. As a result, it is possible to prevent the glass filled in the concave portion of the press surface of the die from entering the gas discharge path. For this reason, it becomes difficult to form unnecessary protrusions due to the gas discharge path of the mold on the surface of the convex portion of the glass article. It is possible to form a narrow flow path by reducing the diameter of the gas discharge path itself, but the total area of the flow path is inevitably smaller than that of the above configuration, and the gas It becomes difficult to discharge the gas. According to the above configuration, it is easy to secure the total cross section of the flow path that allows the gas in the recess to efficiently flow into the gas discharge path while making the flow path relatively narrow, and it is unnecessary for the glass article. It is difficult for protrusions to be formed. Further, since the tip portion of the shaft-shaped member is separated from the gas discharge path, the heat of the tip portion of the shaft-shaped member can be released to the outside through the gas discharge path. The temperature is lower than the other parts of the mold device, and the effect of cooling the glass can be enhanced.
なお、軸状部材の先端部における気体排出路の内壁面からの離間は、軸状部材の先端部において、その外周面が全周にわたって気体排出路の内壁面から離間している場合に限らず、軸状部材の先端部の外周面の一部が気体排出路の内壁面に当接し、他の部分が離間している場合も含むものとする。 The separation of the tip of the shaft-shaped member from the inner wall surface of the gas discharge path is not limited to the case where the outer peripheral surface of the tip of the shaft-shaped member is separated from the inner wall surface of the gas discharge path over the entire circumference. It is also assumed that a part of the outer peripheral surface of the tip end portion of the shaft-shaped member is in contact with the inner wall surface of the gas discharge path and the other portion is separated.
上記金型装置において、前記気体排出路は、前記金型の外面に開口する排出口を有し、前記軸状部材は、前記排出口から突出する突出部を備えることが好ましい。
この構成によれば、金型装置の軸状部材の突出部を、例えば外気等で冷却することで、軸状部材の温度をより低くすることができる。これにより、軸状部材の先端面に接触したガラスを冷却する効果を高めることができる。すなわち、軸状部材の先端面にガラスが接触することで、ガラスの流動性が低下するため、ガラスが気体排出路内に入り込むことをさらに抑えることができる。
In the mold apparatus, it is preferable that the gas discharge path has a discharge port that opens to the outer surface of the mold, and the shaft-shaped member includes a protrusion that protrudes from the discharge port.
According to this configuration, the temperature of the shaft-shaped member can be further lowered by cooling the protruding portion of the shaft-shaped member of the mold device with, for example, outside air. As a result, the effect of cooling the glass in contact with the tip surface of the shaft-shaped member can be enhanced. That is, when the glass comes into contact with the tip surface of the shaft-shaped member, the fluidity of the glass is lowered, so that the glass can be further suppressed from entering the gas discharge path.
上記金型装置において、前記軸状部材の前記突出部を冷却する冷却機構をさらに備えることが好ましい。
この構成によれば、金型装置における軸状部材の突出部は、金型装置の冷却機構によって強制的に冷却されるため、軸状部材の先端面に接触したガラスを冷却する効果をさらに高めることができる。
It is preferable that the mold device further includes a cooling mechanism for cooling the protruding portion of the shaft-shaped member.
According to this configuration, the protruding portion of the shaft-shaped member in the mold device is forcibly cooled by the cooling mechanism of the mold device, so that the effect of cooling the glass in contact with the tip surface of the shaft-shaped member is further enhanced. be able to.
上記金型装置において、前記気体排出路を通じて前記凹部内の気体を強制的に排出する吸引機構をさらに備えることが好ましい。
この構成によれば、金型の凹部内にガラスを速やかに充填することができる。なお、軸状部材が冷却機構により強制的に冷却される場合、金型の凹部内にガラスを速やかに充填することができるとともに、ガラスの流動性が低下するため、凹部内に確実にガラスを充填でき、かつガラス物品の凸部の表面に金型の気体排出路を要因とする不要な突起が形成され難くなる。
It is preferable that the mold device further includes a suction mechanism for forcibly discharging the gas in the recess through the gas discharge path.
According to this configuration, the concave portion of the mold can be quickly filled with glass. When the shaft-shaped member is forcibly cooled by the cooling mechanism, the concave portion of the mold can be quickly filled with glass, and the fluidity of the glass decreases, so that the glass is surely filled in the concave portion. It can be filled, and it becomes difficult for unnecessary protrusions due to the gas discharge path of the mold to be formed on the surface of the convex portion of the glass article.
上記金型装置において、前記軸状部材は、前記気体排出路内に取り付けられる取付部を有し、前記取付部は、前記気体排出路内の気体を前記金型の外部に排出させる方向に導く気体流通路を有することが好ましい。 In the mold device, the shaft-shaped member has a mounting portion to be mounted in the gas discharge path, and the mounting portion guides the gas in the gas discharge path to the outside of the mold. It is preferable to have a gas flow passage.
この構成によれば、例えば、金型装置における軸状部材の取付部を利用して軸状部材を金型から脱着することで、金型のメンテナンスを行うことができる。
上記課題を解決するガラス物品の製造方法は、上記金型装置を用いてガラスをプレス成形することにより、前記金型の前記凹部に対応して形成される凸部を有するガラス物品を得る。
According to this configuration, for example, maintenance of the mold can be performed by attaching and detaching the shaft-shaped member from the mold by using the mounting portion of the shaft-shaped member in the mold device.
A method for producing a glass article that solves the above problems is to obtain a glass article having a convex portion formed corresponding to the concave portion of the mold by press-molding the glass using the mold device.
本発明によれば、外面に凸部を有するガラス物品の外観品位を容易に高めることができる。 According to the present invention, the appearance quality of a glass article having a convex portion on the outer surface can be easily improved.
以下、金型装置及びガラス物品の製造方法の一実施形態について図面を参照して説明する。なお、図面では、説明の便宜上、構成の一部を誇張又は簡略化して示す場合がある。また、各部分の寸法比率についても、実際と異なる場合がある。 Hereinafter, an embodiment of a mold apparatus and a method for manufacturing a glass article will be described with reference to the drawings. In the drawings, for convenience of explanation, a part of the configuration may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ from the actual one.
図１に示すように、金型装置１１は、ガラスＧのプレス成形に用いられるものであり、下型１２と上型１３とを備えている。金型装置１１の下型１２は、第１プレス面Ｐ１を有し、金型装置１１の上型１３は、第２プレス面Ｐ２を有している。金型装置１１のキャビティは、第１プレス面Ｐ１と第２プレス面Ｐ２とにより形成されている。 As shown in FIG. 1, the mold apparatus 11 is used for press forming of glass G, and includes a lower mold 12 and an upper mold 13. The lower die 12 of the die device 11 has a first press surface P1, and the upper die 13 of the die device 11 has a second press surface P2. The cavity of the die device 11 is formed by the first press surface P1 and the second press surface P2.
下型１２の第１プレス面Ｐ１は、凹部１４を含んでいる。この第１プレス面Ｐ１の凹部１４にガラスＧが充填されることで、外面に凸部を有するガラス物品を得ることができる。 The first press surface P1 of the lower mold 12 includes a recess 14. By filling the concave portion 14 of the first press surface P1 with the glass G, a glass article having a convex portion on the outer surface can be obtained.
図２に示すように、金型装置１１の下型１２は、気体排出路１５を有している。下型１２の気体排出路１５は、下型１２の凹部１４内の気体が流入する流入口１５ａと、下型１２の底面に開口する排出口１５ｂとを有している。また、本実施形態の気体排出路１５において、流入口１５ａ側の内径は、排出口１５ｂ側の内径よりも小さく形成されているが、これに限定されず、気体排出路１５の内径は一定であってもよいし、例えば排出口１５ｂ側の内径が流入口１５ａ側の内径よりも小さく形成されていてもよい。 As shown in FIG. 2, the lower mold 12 of the mold device 11 has a gas discharge path 15. The gas discharge path 15 of the lower mold 12 has an inflow port 15a into which the gas in the recess 14 of the lower mold 12 flows in, and a discharge port 15b that opens to the bottom surface of the lower mold 12. Further, in the gas discharge path 15 of the present embodiment, the inner diameter on the inflow port 15a side is formed smaller than the inner diameter on the discharge port 15b side, but the present invention is not limited to this, and the inner diameter of the gas discharge path 15 is constant. For example, the inner diameter on the discharge port 15b side may be smaller than the inner diameter on the inflow port 15a side.
本実施形態の金型装置１１の上型１３は、第１上型１３ａ、第２上型１３ｂ、及び第３上型１３ｃからなる３分割の構造を有している。なお、上型１３の分割構造は、成形するガラス製品の形状等に応じて適宜変更することができる。 The upper mold 13 of the mold device 11 of the present embodiment has a three-divided structure including a first upper mold 13a, a second upper mold 13b, and a third upper mold 13c. The divided structure of the upper mold 13 can be appropriately changed according to the shape of the glass product to be molded and the like.
図２及び図３（ａ）に示すように、金型装置１１は、下型１２の気体排出路１５に対応して設けられる軸状部材１６をさらに備えている。軸状部材１６は、下型１２の気体排出路１５内に配置される先端部１６ａを有している。なお、図３では、軸状部材１６の先端部１６ａ（先端面）を梨地模様で示している。 As shown in FIGS. 2 and 3A, the mold device 11 further includes a shaft-shaped member 16 provided corresponding to the gas discharge path 15 of the lower mold 12. The shaft-shaped member 16 has a tip portion 16a arranged in the gas discharge path 15 of the lower mold 12. In FIG. 3, the tip portion 16a (tip surface) of the shaft-shaped member 16 is shown in a satin pattern.
軸状部材１６の先端部１６ａは、気体排出路１５の流入口１５ａ側の端部において気体排出路１５の内壁面から離間させて配置されている。これにより、図２に矢印で示すように、下型１２の凹部１４内の気体は、気体排出路１５の内壁面と軸状部材１６の先端部１６ａとの間に流入することが可能である。 The tip portion 16a of the shaft-shaped member 16 is arranged at the end portion of the gas discharge passage 15 on the inflow port 15a side so as to be separated from the inner wall surface of the gas discharge passage 15. As a result, as shown by an arrow in FIG. 2, the gas in the recess 14 of the lower mold 12 can flow between the inner wall surface of the gas discharge path 15 and the tip portion 16a of the shaft-shaped member 16. ..
本実施形態の軸状部材１６の先端部１６ａは、中実構造を有している。軸状部材１６の先端面の面積は、気体排出路１５の流入口１５ａの開口面積の１０％以上、９０％以下の範囲内とされることが好ましく、より好ましくは、３０％以上、７０％以下の範囲内である。軸状部材１６の先端部１６ａにおける先端面は、気体排出路１５における流入口１５ａを取り囲む第１プレス面Ｐ１と面一になるように形成されていることが好ましい。 The tip portion 16a of the shaft-shaped member 16 of the present embodiment has a solid structure. The area of the tip surface of the shaft-shaped member 16 is preferably within a range of 10% or more and 90% or less of the opening area of the inflow port 15a of the gas discharge path 15, and more preferably 30% or more and 70%. It is within the following range. The tip surface of the tip portion 16a of the shaft-shaped member 16 is preferably formed so as to be flush with the first press surface P1 surrounding the inflow port 15a in the gas discharge path 15.
金型装置１１の軸状部材１６は、下型１２の気体排出路１５の開口部から突出する突出部１６ｂと、気体排出路１５内に取り付けられる取付部１６ｃとを有している。軸状部材１６の取付部１６ｃは、先端部１６ａと突出部１６ｂとの間に設けられている。本実施形態の取付部１６ｃは、雄ねじ部から構成され、下型１２の気体排出路１５に形成された雌ねじ部に螺合されることで、気体排出路１５に取り付けられる。 The shaft-shaped member 16 of the mold device 11 has a protruding portion 16b protruding from the opening of the gas discharge path 15 of the lower mold 12 and an attachment portion 16c mounted in the gas discharge path 15. The mounting portion 16c of the shaft-shaped member 16 is provided between the tip portion 16a and the protruding portion 16b. The attachment portion 16c of the present embodiment is composed of a male screw portion and is attached to the gas discharge passage 15 by being screwed into the female screw portion formed in the gas discharge passage 15 of the lower mold 12.
軸状部材１６は、下型１２の気体排出路１５内の気体の下型１２の外部に排出させる方向に導く気体流通路１７を有している。軸状部材１６の気体流通路１７は、下型１２の気体排出路１５内の気体が流入される溝部１８と、溝部１８から気体が流入される貫通孔１９とを有している。気体流通路１７の貫通孔１９は、軸状部材１６の突出部１６ｂに開口する流出口１９ａを有している。 The shaft-shaped member 16 has a gas flow passage 17 that guides the gas in the gas discharge passage 15 of the lower mold 12 to the outside of the lower mold 12. The gas flow passage 17 of the shaft-shaped member 16 has a groove portion 18 into which the gas in the gas discharge passage 15 of the lower mold 12 flows in, and a through hole 19 in which the gas flows in from the groove portion 18. The through hole 19 of the gas flow passage 17 has an outlet 19a that opens into the protruding portion 16b of the shaft-shaped member 16.
軸状部材１６は、金型の金属材料と同種又は異種の金属材料から形成することができる。
図２に示すように、金型装置１１は、軸状部材１６の突出部１６ｂを冷却する冷却機構２０をさらに備えている。冷却機構２０としては、例えば、送風ファン、冷媒循環機構等を用いることができる。金型装置１１は、下型１２の気体排出路１５を通じて下型１２の凹部１４内の気体を強制的に排出する吸引機構２１をさらに備えている。吸引機構２１としては、例えば、電動ポンプを用いることができる。
The shaft-shaped member 16 can be formed of a metal material of the same type or different from that of the metal material of the mold.
As shown in FIG. 2, the mold device 11 further includes a cooling mechanism 20 for cooling the protruding portion 16b of the shaft-shaped member 16. As the cooling mechanism 20, for example, a blower fan, a refrigerant circulation mechanism, or the like can be used. The mold device 11 further includes a suction mechanism 21 for forcibly discharging the gas in the recess 14 of the lower mold 12 through the gas discharge passage 15 of the lower mold 12. As the suction mechanism 21, for example, an electric pump can be used.
ガラス物品としては、トレイ、容器、調理機器用のターンテーブル、リフレクター用等の薄膜積層用の基板、窓材等が挙げられる。
これらの用途のガラス物品に用いるガラスＧは、耐熱性を有するものが好ましい。耐熱ガラスとしては、例えば、３０〜７５０℃における平均線熱膨張係数が−１０〜＋３０×１０−７／℃程度の極めて低膨張な結晶化ガラス（ガラスセラミックス）が挙げられる。耐熱ガラスの組成は、質量％で、ＳｉＯ２：５５〜７５％、Ａｌ２Ｏ３：２０．５〜２７％、Ｌｉ２Ｏ：２％以上、ＴｉＯ２：１．５〜３％、ＴｉＯ２＋ＺｒＯ２：３．８〜５％、ＳｎＯ２：０．１〜０．５％を含むことが好ましい。
Examples of glass articles include trays, containers, turntables for cooking equipment, substrates for thin film lamination such as reflectors, window materials, and the like.
The glass G used for the glass articles for these purposes is preferably one having heat resistance. Examples of the heat-resistant glass include extremely low-expansion crystallized glass (glass ceramics) having an average linear thermal expansion coefficient of about −10 to +30 × 10 −7 / ° C. at 30 to 750 ° C. The composition of the heat-resistant glass is SiO 2 : 55 to 75%, Al 2 O 3 : 20.5 to 27%, Li 2 O: 2% or more, TiO 2 : 1.5 to 3%, TiO 2 in mass%. It is preferable to contain + ZrO 2 : 3.8 to 5% and SnO 2 : 0.1 to 0.5%.
ガラス物品に用いる耐熱ガラスは、例えば、硼珪酸ガラスであってもよい。硼珪酸ガラスのガラス組成は、質量％で、ＳｉＯ２：７０〜８５％、Ａｌ２Ｏ３：０〜５％、Ｂ２Ｏ３：１０〜２０％、Ｎａ２Ｏ：２〜１０％、Ｋ２Ｏ：０〜５％を含有することが好ましい。 The heat-resistant glass used for the glass article may be, for example, borosilicate glass. The glass composition of borosilicate glass is SiO 2 : 70 to 85%, Al 2 O 3 : 0 to 5%, B 2 O 3 : 10 to 20%, Na 2 O: 2 to 10%, K in mass%. 2 O: It is preferable to contain 0 to 5%.
次に、ガラス物品の製造方法について上記金型装置１１の主な作用とともに説明する。
ガラス物品の製造方法は、金型装置１１を用いてガラスＧをプレス成形することにより、下型１２の凹部１４に対応して形成される凸部を有するガラス物品を得る方法である。ガラス物品の製造方法では、まず下型１２の第１プレス面Ｐ１上にガラス物品に必要な量のガラスゴブを載置し、上型１３を降下させることで下型１２の第１プレス面Ｐ１と上型１３の第２プレス面Ｐ２との間でガラスゴブをプレスする。
Next, a method for manufacturing a glass article will be described together with the main operations of the mold apparatus 11.
The method for manufacturing a glass article is a method of obtaining a glass article having a convex portion formed corresponding to a concave portion 14 of the lower mold 12 by press-molding the glass G using a mold device 11. In the method for manufacturing a glass article, first, an amount of glass gobs required for the glass article is placed on the first press surface P1 of the lower mold 12, and the upper mold 13 is lowered to form the first press surface P1 of the lower mold 12. The glass gob is pressed between the upper mold 13 and the second press surface P2.
図２に二点鎖線で示すように、ガラスＧが下型１２の第１プレス面Ｐ１の凹部１４に入り込む際に凹部１４内の気体は、気体排出路１５を通じて排出される。このように凹部１４内の気体が排出されながら凹部１４内にガラスＧが充填される。このとき、本実施形態の金型装置１１は、吸引機構２１を備えているため、凹部１４内の気体を強制的に排出することができる。 As shown by the alternate long and short dash line in FIG. 2, when the glass G enters the recess 14 of the first press surface P1 of the lower mold 12, the gas in the recess 14 is discharged through the gas discharge path 15. In this way, the glass G is filled in the recess 14 while the gas in the recess 14 is discharged. At this time, since the mold device 11 of the present embodiment includes the suction mechanism 21, the gas in the recess 14 can be forcibly discharged.
ここで、金型装置１１の軸状部材１６の先端部１６ａは、気体排出路１５の流入口１５ａ側の端部において気体排出路１５の内壁面から離間させて配置されている。この構成によれば、軸状部材１６の先端部１６ａの外周面と、気体排出路１５の内壁面との間に比較的狭い気体の流路を形成することができる。このため、第１プレス面Ｐ１の凹部１４に充填されたガラスＧが気体排出路１５内に入り込むことを抑えることができる。 Here, the tip portion 16a of the shaft-shaped member 16 of the mold device 11 is arranged at the end portion of the gas discharge path 15 on the inflow port 15a side so as to be separated from the inner wall surface of the gas discharge path 15. According to this configuration, a relatively narrow gas flow path can be formed between the outer peripheral surface of the tip portion 16a of the shaft-shaped member 16 and the inner wall surface of the gas discharge path 15. Therefore, it is possible to prevent the glass G filled in the recess 14 of the first press surface P1 from entering the gas discharge path 15.
また、本実施形態の金型装置１１の軸状部材１６は、気体排出路１５の排出口１５ｂから突出する突出部１６ｂを有している。この軸状部材１６の突出部１６ｂを例えば外気等で冷却することで、軸状部材１６の温度をより低くすることができる。これにより、軸状部材１６の先端面に接触したガラスＧを冷却する効果を高めることができる。すなわち、軸状部材１６の先端面にガラスＧが接触することで、ガラスＧの流動性が低下するため、ガラスＧが気体排出路１５内に入り込むことをさらに抑えることができる。本実施形態では、金型装置１１の冷却機構２０によって軸状部材１６を強制的に冷却しているため、軸状部材１６の先端面に接触したガラスＧを冷却する効果をさらに高めることができる。 Further, the shaft-shaped member 16 of the mold device 11 of the present embodiment has a protruding portion 16b protruding from the discharge port 15b of the gas discharge path 15. By cooling the protruding portion 16b of the shaft-shaped member 16 with, for example, outside air, the temperature of the shaft-shaped member 16 can be further lowered. As a result, the effect of cooling the glass G in contact with the tip surface of the shaft-shaped member 16 can be enhanced. That is, when the glass G comes into contact with the tip surface of the shaft-shaped member 16, the fluidity of the glass G decreases, so that the glass G can be further suppressed from entering the gas discharge path 15. In the present embodiment, since the shaft-shaped member 16 is forcibly cooled by the cooling mechanism 20 of the mold device 11, the effect of cooling the glass G in contact with the tip surface of the shaft-shaped member 16 can be further enhanced. ..
ガラスＧ物品の製造方法では、ガラスＧのプレス成形が完了した後、上型１３を上昇させて下型１２からガラス物品を取り出す。このようにしてガラス物品を製造することで、気体排出路１５を要因として形成される突起を極めて小さくすることができる。 In the method for manufacturing a glass G article, after the press molding of the glass G is completed, the upper die 13 is raised and the glass article is taken out from the lower die 12. By manufacturing the glass article in this way, the protrusions formed due to the gas discharge path 15 can be made extremely small.
次に、本実施形態の作用及び効果について説明する。
（１）金型装置１１は、凹部１４を含む第１プレス面Ｐ１を有する金型である下型１２を備え、ガラスＧのプレス成形に用いられる。金型装置１１の下型１２は、第１プレス面Ｐ１の凹部１４内の気体を排出する気体排出路１５を有している。下型１２の気体排出路１５は、第１プレス面Ｐ１の凹部１４内に開口し、この凹部１４内の気体を流入する流入口１５ａを有している。金型装置１１は、気体排出路１５内に配置される先端部１６ａを有する軸状部材１６をさらに備えている。金型装置１１における軸状部材１６の先端部１６ａは、気体排出路１５の流入口１５ａ側の端部において気体排出路１５の内壁面から離間させて配置されている。
Next, the action and effect of this embodiment will be described.
(1) The mold apparatus 11 includes a lower mold 12 which is a mold having a first press surface P1 including a recess 14, and is used for press molding of glass G. The lower die 12 of the die device 11 has a gas discharge path 15 for discharging gas in the recess 14 of the first press surface P1. The gas discharge path 15 of the lower mold 12 is opened in the recess 14 of the first press surface P1 and has an inflow port 15a through which the gas in the recess 14 flows. The mold device 11 further includes a shaft-shaped member 16 having a tip portion 16a arranged in the gas discharge path 15. The tip portion 16a of the shaft-shaped member 16 in the mold device 11 is arranged at the end portion of the gas discharge path 15 on the inflow port 15a side so as to be separated from the inner wall surface of the gas discharge path 15.
この構成によれば、金型装置１１の軸状部材１６における先端部１６ａを、気体排出路１５の流入口１５ａ側の端部において気体排出路１５の内壁面から離間させて配置することで、軸状部材１６の先端部１６ａの外周面と、気体排出路１５の内壁面との間に比較的狭い流路を形成することができる。これにより、下型１２の第１プレス面Ｐ１の凹部１４に充填されたガラスＧが気体排出路１５内に入り込むことを抑えることができる。このため、ガラス物品の凸部の表面に下型１２の気体排出路１５を要因とする不要な突起が形成され難くなる。従って、外面に凸部を有するガラス物品の外観品位を容易に高めることができる。 According to this configuration, the tip portion 16a of the shaft-shaped member 16 of the mold device 11 is arranged at the end portion of the gas discharge passage 15 on the inflow port 15a side so as to be separated from the inner wall surface of the gas discharge passage 15. A relatively narrow flow path can be formed between the outer peripheral surface of the tip portion 16a of the shaft-shaped member 16 and the inner wall surface of the gas discharge path 15. As a result, it is possible to prevent the glass G filled in the recess 14 of the first press surface P1 of the lower mold 12 from entering the gas discharge path 15. Therefore, it becomes difficult to form unnecessary protrusions due to the gas discharge path 15 of the lower mold 12 on the surface of the convex portion of the glass article. Therefore, the appearance quality of the glass article having the convex portion on the outer surface can be easily improved.
本実施形態のように、軸状部材１６の先端部１６ａを気体排出路１５の内壁面から離間させて配置することで、気体排出路１５の流入口１５ａの内周囲全体より気体の排出を行うことができる。すなわち、金型装置１１における軸状部材１６の先端部１６ａの配置を利用して、流路幅の狭い部分を気体排出路１５の流入口１５ａに形成することで、気体排出路１５内にガラスＧが入り込むことを抑えることができ、かつ気体の流量も確保することが容易となる。 By arranging the tip portion 16a of the shaft-shaped member 16 so as to be separated from the inner wall surface of the gas discharge path 15 as in the present embodiment, gas is discharged from the entire inner circumference of the inflow port 15a of the gas discharge path 15. be able to. That is, by utilizing the arrangement of the tip portion 16a of the shaft-shaped member 16 in the mold device 11 and forming a portion having a narrow flow path width at the inflow port 15a of the gas discharge path 15, glass is formed in the gas discharge path 15. It is possible to suppress the entry of G, and it becomes easy to secure the flow rate of the gas.
さらに、軸状部材１６の先端部１６ａが気体排出路１５から離間されることにより、軸状部材１６の熱を、気体排出路１５を介して外部に効率的に放出できるため、軸状部材１６の先端部１６ａは、金型装置１１の他の部分よりも温度が低くなり、ガラスＧを冷却する効果を高めることができる。 Further, since the tip portion 16a of the shaft-shaped member 16 is separated from the gas discharge path 15, the heat of the shaft-shaped member 16 can be efficiently released to the outside through the gas discharge path 15, so that the shaft-shaped member 16 can be efficiently released to the outside. The temperature of the tip portion 16a of the mold device 11 is lower than that of the other parts of the mold device 11, and the effect of cooling the glass G can be enhanced.
特に、本実施形態のように、軸状部材１６の先端部１６ａにおいて、その外周面が全周にわたって気体排出路１５の内壁面から離間している場合には、軸状部材１６の先端部１６ａの外周面の一部が気体排出路１５の内壁面に当接している場合に比べて、冷却作用が得られ易い。 In particular, when the outer peripheral surface of the tip portion 16a of the shaft-shaped member 16 is separated from the inner wall surface of the gas discharge path 15 over the entire circumference as in the present embodiment, the tip portion 16a of the shaft-shaped member 16 A cooling action can be easily obtained as compared with the case where a part of the outer peripheral surface of the gas discharge path 15 is in contact with the inner wall surface of the gas discharge path 15.
（２）金型装置１１において、下型１２の気体排出路１５は、下型１２の外面に開口する排出口１５ｂを有し、軸状部材１６は、気体排出路１５の排出口１５ｂから突出する突出部１６ｂを備えている。この場合、軸状部材１６の突出部１６ｂを例えば外気等で冷却することで、軸状部材１６の温度をより低くすることができる。これにより、軸状部材１６の先端面に接触したガラスＧを冷却する効果を高めることができる。すなわち、軸状部材１６の先端面にガラスＧが接触することで、ガラスＧの流動性が低下するため、ガラスＧが気体排出路１５内に入り込むことをさらに抑えることができる。従って、ガラス物品の外観品位をさらに高めることが容易となる。 (2) In the mold apparatus 11, the gas discharge path 15 of the lower mold 12 has a discharge port 15b that opens to the outer surface of the lower mold 12, and the shaft-shaped member 16 projects from the discharge port 15b of the gas discharge path 15. A protruding portion 16b is provided. In this case, the temperature of the shaft-shaped member 16 can be further lowered by cooling the protruding portion 16b of the shaft-shaped member 16 with, for example, outside air. As a result, the effect of cooling the glass G in contact with the tip surface of the shaft-shaped member 16 can be enhanced. That is, when the glass G comes into contact with the tip surface of the shaft-shaped member 16, the fluidity of the glass G decreases, so that the glass G can be further suppressed from entering the gas discharge path 15. Therefore, it becomes easy to further improve the appearance quality of the glass article.
（３）金型装置１１は、軸状部材１６の突出部１６ｂを冷却する冷却機構２０をさらに備えている。この場合、金型装置１１における軸状部材１６の突出部１６ｂは、金型装置１１の冷却機構２０によって強制的に冷却されるため、軸状部材１６の先端面に接触したガラスＧを冷却する効果をさらに高めることができる。 (3) The mold device 11 further includes a cooling mechanism 20 for cooling the protruding portion 16b of the shaft-shaped member 16. In this case, the protruding portion 16b of the shaft-shaped member 16 in the mold device 11 is forcibly cooled by the cooling mechanism 20 of the mold device 11, so that the glass G in contact with the tip surface of the shaft-shaped member 16 is cooled. The effect can be further enhanced.
（４）金型装置１１は、下型１２の気体排出路１５を通じて下型１２の凹部１４内の気体を強制的に排出する吸引機構２１をさらに備えている。この場合、下型１２の凹部１４内にガラスＧを速やかに充填することができる。従って、例えば、ガラス物品の生産性を高めることができる。また、このように生産性を高めたとしても、下型１２の気体排出路１５内にガラスＧが入り込むことを金型装置１１の軸状部材１６によって抑えることができるため、ガラス物品の外観品位を維持することが可能となる。 (4) The mold device 11 further includes a suction mechanism 21 for forcibly discharging the gas in the recess 14 of the lower mold 12 through the gas discharge passage 15 of the lower mold 12. In this case, the glass G can be quickly filled in the recess 14 of the lower mold 12. Therefore, for example, the productivity of glass articles can be increased. Further, even if the productivity is increased in this way, the axial member 16 of the mold device 11 can prevent the glass G from entering the gas discharge path 15 of the lower mold 12, so that the appearance quality of the glass article is high. Can be maintained.
（５）金型装置１１の軸状部材１６は、気体排出路１５内に取り付けられる取付部１６ｃを有している。軸状部材１６の取付部１６ｃは、気体排出路１５内の気体を下型１２の外部に排出させる方向に導く気体流通路１７を有している。この場合、例えば、軸状部材１６の取付部１６ｃを利用して軸状部材１６を下型１２から脱着することで、下型１２のメンテナンスを行うことができる。 (5) The shaft-shaped member 16 of the mold device 11 has a mounting portion 16c to be mounted in the gas discharge path 15. The attachment portion 16c of the shaft-shaped member 16 has a gas flow passage 17 that guides the gas in the gas discharge path 15 to the outside of the lower mold 12. In this case, for example, maintenance of the lower mold 12 can be performed by attaching and detaching the shaft-shaped member 16 from the lower mold 12 by using the mounting portion 16c of the shaft-shaped member 16.
（変更例）
本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
(Change example)
This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
・金型装置１１の軸状部材１６を下型１２に取り付ける取付部１６ｃの構造は、上述した螺合させる構造に限定されず、例えば、軸状部材１６を下型１２の気体排出路１５内に係止させる構造や、軸状部材１６を下型１２の気体排出路１５内に嵌合させる構造等であってもよい。また、金型装置１１の軸状部材１６は、例えば、下型１２と溶接等で接合することで取り付けることも可能である。 The structure of the mounting portion 16c for attaching the shaft-shaped member 16 of the mold device 11 to the lower mold 12 is not limited to the screwing structure described above, and for example, the shaft-shaped member 16 is placed in the gas discharge path 15 of the lower mold 12. The structure may be such that the shaft-shaped member 16 is fitted into the gas discharge path 15 of the lower mold 12. Further, the shaft-shaped member 16 of the mold device 11 can be attached by joining with the lower mold 12 by welding or the like, for example.
・金型装置１１の軸状部材１６における突出部１６ｂを省略し、軸状部材１６の全体を気体排出路１５内に配置してもよい。
・金型装置１１の軸状部材１６における突出部１６ｂを省略し、軸状部材１６の全体を気体排出路１５内に配置するとともに、軸状部材１６を冷却機構２０により冷却してもよい。
The protruding portion 16b of the shaft-shaped member 16 of the mold device 11 may be omitted, and the entire shaft-shaped member 16 may be arranged in the gas discharge path 15.
The protruding portion 16b of the shaft-shaped member 16 of the mold device 11 may be omitted, the entire shaft-shaped member 16 may be arranged in the gas discharge path 15, and the shaft-shaped member 16 may be cooled by the cooling mechanism 20.
・図３（ｂ）に示すように、金型装置１１において、軸状部材１６の先端部１６ａの構造は、中実構造に限定されず、筒状に形成されることで、中空部１６ｄを有する中空構造であってもよい。 As shown in FIG. 3B, in the mold apparatus 11, the structure of the tip portion 16a of the shaft-shaped member 16 is not limited to the solid structure, and the hollow portion 16d is formed by being formed in a tubular shape. It may have a hollow structure.
・図４（ａ）及び図４（ｂ）に示すように、軸状部材１６の先端部１６ａは、複数に分割されていてもよい。また、軸状部材１６の先端面の形状は、円形状に限定されず、例えば、多角形状等であってもよい。 As shown in FIGS. 4A and 4B, the tip portion 16a of the shaft-shaped member 16 may be divided into a plurality of parts. Further, the shape of the tip surface of the shaft-shaped member 16 is not limited to the circular shape, and may be, for example, a polygonal shape or the like.
・図４（ｂ）に示すように、気体排出路１５の断面形状についても、円形状に限定されず、多角形状等であってもよい。
・金型装置１１の吸引機構２１を省略し、ガラスＧを凹部１４内に向けて押圧する上型１３のプレス圧によって下型１２の凹部１４内の気体を押し出すこともできる。
-As shown in FIG. 4B, the cross-sectional shape of the gas discharge path 15 is not limited to the circular shape, but may be a polygonal shape or the like.
The suction mechanism 21 of the mold device 11 can be omitted, and the gas in the recess 14 of the lower mold 12 can be pushed out by the pressing pressure of the upper mold 13 that presses the glass G toward the recess 14.
・金型装置１１の冷却機構２０を省略することもできる。
・凹部１４及び気体排出路１５を有する金型は、下型１２に限定されず、上型１３であってもよい。この場合、上型１３の気体排出路１５内に軸状部材１６の先端部１６ａを配置すればよい。
-The cooling mechanism 20 of the mold device 11 can be omitted.
The mold having the recess 14 and the gas discharge path 15 is not limited to the lower mold 12, and may be the upper mold 13. In this case, the tip portion 16a of the shaft-shaped member 16 may be arranged in the gas discharge path 15 of the upper die 13.
１１…金型装置、１２…下型、１３…上型、１４…凹部、１５…気体排出路、１５ａ…流入口、１５ｂ…排出口、１６…軸状部材、１６ａ…先端部、１６ｂ…突出部、１６ｃ…取付部、１７…気体流通路、２０…冷却機構、２１…吸引機構、Ｇ…ガラス、Ｐ１…第１プレス面。 11 ... Mold device, 12 ... Lower mold, 13 ... Upper mold, 14 ... Recessed, 15 ... Gas discharge path, 15a ... Inflow port, 15b ... Discharge port, 16 ... Shaft-shaped member, 16a ... Tip, 16b ... Protruding Part, 16c ... Mounting part, 17 ... Gas flow passage, 20 ... Cooling mechanism, 21 ... Suction mechanism, G ... Glass, P1 ... First press surface.
Claims (6)
前記金型は、前記凹部内の気体を排出する気体排出路を有し、
前記気体排出路は、前記凹部内に開口し、前記凹部内の気体を流入する流入口を有し、
前記金型装置は、前記気体排出路内に配置される先端部を有する軸状部材をさらに備え、
前記軸状部材の前記先端部は、前記気体排出路の前記流入口側の端部において前記気体排出路の内壁面から離間させて配置される、金型装置。 A mold device having a mold having a press surface including a recess and used for press molding of glass.
The mold has a gas discharge path for discharging the gas in the recess.
The gas discharge path has an inflow port that opens in the recess and allows gas to flow into the recess.
The mold device further comprises a shaft-shaped member having a tip that is arranged in the gas discharge path.
A mold device in which the tip end portion of the shaft-shaped member is arranged at an end portion of the gas discharge path on the inflow port side so as to be separated from the inner wall surface of the gas discharge path.
前記軸状部材は、前記排出口から突出する突出部を備える、請求項１に記載の金型装置。 The gas discharge path has a discharge port that opens to the outer surface of the mold.
The mold device according to claim 1, wherein the shaft-shaped member includes a protruding portion protruding from the discharge port.
前記取付部は、前記気体排出路内の気体を前記金型の外部に排出させる方向に導く気体流通路を有する、請求項１から請求項４のいずれか一項に記載の金型装置。 The shaft-shaped member has a mounting portion to be mounted in the gas discharge path.
The mold device according to any one of claims 1 to 4, wherein the mounting portion has a gas flow passage that guides the gas in the gas discharge path to the outside of the mold.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51133356A (en) * | 1975-05-15 | 1976-11-19 | Nippon Ester Co Ltd | Method of cooling and drawing strand |
| JPS61201806A (en) * | 1985-03-04 | 1986-09-06 | Mitsubishi Heavy Ind Ltd | Tappet device for reciprocating engine |
| JPH09328321A (en) * | 1996-06-06 | 1997-12-22 | Nippon Electric Glass Co Ltd | Bottom metallic force for forming glass |
| JP2003112932A (en) * | 2001-10-01 | 2003-04-18 | Asahi Techno Glass Corp | Forming die for glass and press forming machine |
| JP2016043491A (en) * | 2014-08-19 | 2016-04-04 | 住友ゴム工業株式会社 | Vent piece |
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2019
- 2019-03-26 JP JP2019058954A patent/JP7159937B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51133356A (en) * | 1975-05-15 | 1976-11-19 | Nippon Ester Co Ltd | Method of cooling and drawing strand |
| JPS61201806A (en) * | 1985-03-04 | 1986-09-06 | Mitsubishi Heavy Ind Ltd | Tappet device for reciprocating engine |
| JPH09328321A (en) * | 1996-06-06 | 1997-12-22 | Nippon Electric Glass Co Ltd | Bottom metallic force for forming glass |
| JP2003112932A (en) * | 2001-10-01 | 2003-04-18 | Asahi Techno Glass Corp | Forming die for glass and press forming machine |
| JP2016043491A (en) * | 2014-08-19 | 2016-04-04 | 住友ゴム工業株式会社 | Vent piece |
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