JP3727677B2 - Glass product press molding equipment - Google Patents

Glass product press molding equipment Download PDF

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Publication number
JP3727677B2
JP3727677B2 JP25289994A JP25289994A JP3727677B2 JP 3727677 B2 JP3727677 B2 JP 3727677B2 JP 25289994 A JP25289994 A JP 25289994A JP 25289994 A JP25289994 A JP 25289994A JP 3727677 B2 JP3727677 B2 JP 3727677B2
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Japan
Prior art keywords
plunger
glass product
molding
press molding
air
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Expired - Lifetime
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JP25289994A
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Japanese (ja)
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JPH0891853A (en
Inventor
正勝 金子
功一 細江
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Ishizuka Glass Co Ltd
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Ishizuka Glass Co Ltd
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Publication date
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Priority to JP25289994A priority Critical patent/JP3727677B2/en
Publication of JPH0891853A publication Critical patent/JPH0891853A/en
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B40/00Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
    • C03B40/04Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it using gas
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06Construction of plunger or mould

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、ガラス製品のプレス成形、例えば皿、鉢やタンブラーのプレス成形装置に関するもので、具体的にはプレス成形後のプランジャとガラス製品の離型を短時間で安定して行うことにより、成形スピードの向上と品質の良化を図るものである。
【0002】
【従来の技術】
ガラス製品のプレス成形方法には、口天部を目金で形成する目金成形と、目金は成形機の構成上取り付けてあるが口天部を目金で形状を決めずにフリーの状態で形成するフリー成形の2種類が一般的である。該プレス成形方法はツボ型、割型、ツボ割型(ツボ型と割型を組み合わせたもの)等に区分され、胴型、底型、プランジャ及び目金の4種類の金型で構成される。(ツボ型は底型の無い場合もある.)
【0003】
通常プレス成形は胴型に所定重量の溶融ガラス塊(以下ゴブという)が供給され、次にプランジャが目金と共に下降してゴブをプレスすることにより、皿鉢等のガラス製品が形成され、その後プランジャが上昇し、胴型内で製品が変形しない温度域まで冷却された後に胴型から取り出され口焼きや徐冷等の次工程へ搬送される。
【0004】
上記のプランジャの下降・プレス・上昇の作動の内で、下降速度(時間)とプレス圧・プレス時間は製品の形状や大きさで決定されるが、形成が完了してプランジャを上昇させる速度と時間は、単位時間当たりの成形数を上げる為に極力早く短くするよう成形工程では切望されている。しかし、このプランジャの上昇の速度が早すぎると、形成されたガラス製品とプランジャの間が瞬間的にバキューム状態となり、次の瞬間にガラス製品とプランジャの間に急激な気流が発生することによりガラス製品を浮き上がらせる揚力が発生し、製品形状によってはプランジャの上昇速度を容易に早めることは問題があった。該揚力の発生は底部の面積の広い製品や、底部のフラットな形状の製品は大きく、コップのような細長くクサビ状の製品は小さいことは容易に推察される。
【0005】
上記の揚力発生による製品の浮き上がりを防止するために、目金成形においてはプランジャの上昇に対して目金の上昇タイミングをわずかに遅らせて製品の口天部を押える構成となっていることは良く知られている。しかし、揚力の発生が大きいときは目金で押えることにより浮き上がりは防止できても、製品の底部中央付近が引っ張られて口部は目金で押さえられているために底部が盛り上がるように変形する等の問題が発生していた。
【0006】
一方、フリー成形における揚力による製品の浮き上がりを防止対応は、プランジャの温度を低めにしてガラス製品とプランジャの離型性を良くし、胴型の温度を高めにして胴型にガラス製品を密着させることでプランジャ上昇時のバキューム作用や揚力に抵抗するようにしているが、充分な浮き上がり防止対策とはならず、結果的には目金成形もフリー成形も最善の策はプランジャの上昇をゆっくりと時間をかける場合が多く、成形スピードを上げるための障害となっていた。
【0007】
【発明が解決しようとする課題】
本発明は上記した問題点を解消し、ガラス製品のプレス成形、例えば皿、鉢やタンブラー成形において、プレス後のプランジャの上昇速度を早く短時間で行っても、プランジャとガラス製品の離型が確実で安定させることができ、浮き上がりや変形のトラブルをなくすことにより、ガラス製品の成形スピードの向上と品質の良化を図ることができるガラス製品のプレス成形装置を提供しようするものである。
【0008】
【課題を解決するための手段】
上記の課題を解決するためになされた本発明は、胴型に供給された所定重量の溶融ガラス塊(ゴブ)をプランジャでプレスして成形するガラス製品のプレス成形において、プランジャのプレス先端面部にエアを吹き出すことができ、該吹き出し口の間隙が0.05mm〜0.8mmであるスリットを設けるとともに、該スリットは、スリットにエアを供給する為の円周状のエアチャンバを構成するための段部と複数の凸部から構成されているインサート体をプランジャに組み付けて構成されるものであることを特徴とするものである。
【0009】
ここでスリットの間隙を0.05mm以上としたのはこれ以下であると成形工程で発生するカーボンなどが目詰まりしてエアを吹き出すことが出来なくなるトラブルが発生しやすく、またインサート体とプランジャの金型加工精度にも限界があるためであり、0.8mm以下としたのはこれ以上であるとスリットの痕跡がはっきりとガラス製品に現れたりして製品の外観を損ねたりするからである。好ましくは、該スリットの間隙は0.2mm〜0.6mmとするのが望ましい。
【0010】
【実施例】
以下に本発明を図面の実施例を参照しつつ説明する。図1は本発明のプレス成形装置の断面図であり、プランジャ3が下降してガラス製品5をプレス成形した状態を示している。プランジャ3はプランジャキャップ1に複数の取付けボルト2で取り付けられており、プランジャキャップは目金4とともプランジャ3を昇降させる図示しないプレスシリンダに連結されている。6は胴型であり、プランジャ3と目金4とによって構成されてガラス製品の形状を決定するものであり、一般的なプレス成形の構成であり、詳細説明は省略する。
【0011】
図2(a)はプランジャ3の先端面部3aの中心付近に本発明のエアを吹き出すスリット17を構成するために、プランジャ3の中心部に嵌め込んで取りつけられ固定されたインサート体12の拡大断面図を示している。インサート体12はプランジャ3に螺合するネジ部13と、パッキン部材15を挟持させる台座部と、スリット17にエアを供給する為の円周状のエアチャンバ16を構成するための段部とスリット17を精度良く構成するための複数の凸部19(実施例では6個)から構成されている。凸部19の外径はプランジャ3に穿設された内径に密着して嵌挿される寸法となっている。
【0012】
一方プランジャ3の側胴部にはプランジャ3に組み付けたインサート体12とで構成される円周状のエアチャンバ16に連通するエア供給路11が穿設され、穿設後外部との通気を遮断する埋め金18が施されている。該エア供給路11にはプランジャ3の天面部から連通するエア供給路10と、更にプランジャキャップ1に連通するエア供給路9が設けられており、図示しないエア供給源から所定のタイミングでエアホース8とエアホース取付け材7を経由してエアが供給される構成となっている。
【0013】
プランジャ3とインサート体12の組み付けは、図1、図2(a)で示すようにネジ部13の下端の台座部にパッキン部材15を挟持させ、ネジ部13と、プランジャに設けたネジ部13′で螺合し、成形時の緩みを防止するためにプランジャの内面部3bと溶接14を施しておくのが望ましい。また、パッキン部材15は銅かアルミニウムのような比較的柔らかい金属を選択するのが望ましく、ネジ部13、13′のピッチはインサート体12の嵌め合いを安定させ、パッキン部材15との密着性を確実にするために1.5〜2.0mmにしておくことがよい。図2(b)はインサート体12のプランジャ3先端面方向矢視状態を示している(プランジャ3の関係部分は2点鎖線で示した)。
【0014】
次に本発明の作動内容について説明する。まず胴型6にゴブが供給され、プランジャ3と目金4が同時に下降してゴブがプレスされ胴型6と共にガラス製品5が形成され、ここまでは従来のプレス成形と同じである。次に、プランジャ3と少し遅れて目金4が上昇してプランジャ3からガラス製品5が離型する。このプランジャ3が上昇し始めるタイミングと同時に本発明のスリット17からエアが吹き出すように図示しないエア供給源からエアホース8、エア供給路9、10、11を経由してエアを供給する。この時のエア圧は0.5〜1.5kg /cm 2が望ましい。エア圧が高すぎると形成直後のまだ柔らかい状態のガラス製品5を変形させる恐れがあり、低すぎると離型効果が損なわれるからである。
【0015】
【作用】
このように構成された本発明のガラス製品のプレス成形装置は、プレス後のプランジャ上昇時のバキューム現象による揚力によって発生するガラス製品の浮き上がりを、スリットから吹き出されるエアによりガラス製品押さえることで防止することができるので、プランジャとのガラス製品の離型を確実に安定させることができる。従って、皿鉢類のように底面のフラットな形状で底面積の大きいタイプの製品の成形時には浮き上がり発生のためにプランジャの上昇速度をゆっくりと且つ時間かける必要がなくなるので、成形スピードを上昇するための障害が解消されるとともに、併せて成形のトラブルも大幅に減少させることができる。
【0016】
【発明の効果】
以上説明したように本発明のガラス製品のプレス成形装置は、プレス成形後のプランジャとガラス製品の離型を短時間で安定して行うことができるので、成形スピードの向上と品質の良化を図ることが可能となった。従って、本発明は従来の問題点を解消したものとして業界に寄与するところは極めて大きいものがある。
【図面の簡単な説明】
【図1】本発明の実施例のを示す断斜図である。
【図2】(a)は本発明の実施例のインサート体を示す拡大断面図であり、(b)は(a)のプランジャ先端面方向からの矢視図である。
【符号の説明】
1 プランジャキャップ 2 取付けボルト
3 プランジャ 4 目金
5 ガラス製品 6 胴型
9、10、11 エア供給路
12 インサート体 13、13′ ネジ部
14 溶接 15パッキン部材
16 エアチャンバ 17 スリット
18 埋め金 19 凸部
[0001]
[Industrial application fields]
The present invention relates to press molding of glass products, for example, press molding apparatuses for dishes, bowls, and tumblers, and specifically, by stably releasing the plunger and glass products after press molding in a short time, It is intended to improve molding speed and improve quality.
[0002]
[Prior art]
In the press molding method for glass products, there is a metal mold that forms the mouthpiece with a metal eyepiece, and the eyeglass is attached according to the configuration of the molding machine. Two types of free molding formed by the above are general. The press molding method is classified into a pot type, a split mold, a pot split mold (a combination of a pot type and a split mold), etc., and is composed of four types of molds: a barrel mold, a bottom mold, a plunger, and a metal base. . (The pot type may not have a bottom type.)
[0003]
In normal press molding, a molten glass lump (hereinafter referred to as gob) of a predetermined weight is supplied to the body mold, and then the plunger descends together with the eyeglass to press the gob, thereby forming a glass product such as a dish bowl. The plunger is raised, cooled to a temperature range in which the product is not deformed in the body mold, and then taken out from the body mold and transported to the next step such as mouth baking or slow cooling.
[0004]
Of the above-mentioned operations of lowering, pressing, and raising the plunger, the lowering speed (time) and the pressing pressure / pressing time are determined by the shape and size of the product. Time is eagerly desired in the molding process to shorten the time as quickly as possible in order to increase the number of moldings per unit time. However, if the plunger rises too quickly, the glass product and the plunger are momentarily vacuumed, and a sudden air flow is generated between the glass product and the plunger at the next moment. Lifting force is generated to lift the product, and depending on the product shape, it has been a problem to easily increase the plunger ascending speed. It is easily inferred that the lift is generated in a large product with a large bottom area and a flat product in the bottom, and small in a long and wedge-shaped product such as a cup.
[0005]
In order to prevent the lifting of the product due to the above-mentioned lift generation, it is good that the eyepiece molding is configured to hold the mouthpiece of the product by slightly delaying the raising timing of the eyeglass against the rise of the plunger. Are known. However, when the lift is large, even if the lifting can be prevented by pressing with the eye metal, the bottom part of the product is pulled near the center and the mouth part is pressed with the eye metal, so that the bottom part rises. Etc. had occurred.
[0006]
On the other hand, to prevent product lift due to lift in free molding, the plunger temperature is lowered to improve the releasability between the glass product and the plunger, and the barrel mold temperature is raised to bring the glass product into close contact with the barrel mold. It resists the vacuum action and lift when the plunger is raised, but it is not a sufficient lift prevention measure, and as a result, the best strategy for both mold formation and free molding is to slowly raise the plunger. In many cases, it took time, which was an obstacle to increase the molding speed.
[0007]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problems, and even in the press molding of glass products, for example, dish, bowl, and tumbler molding, the plunger and the glass product can be released from the mold even if the ascending speed of the plunger after pressing is fast and short. It is an object of the present invention to provide a glass product press molding apparatus that can be reliably and stabilized and can improve the molding speed and quality of glass products by eliminating problems of lifting and deformation.
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems. In press molding of a glass product in which a molten glass lump (gob) having a predetermined weight supplied to a body mold is pressed with a plunger, Air can be blown out, and a slit having a gap of 0.05 mm to 0.8 mm is provided, and the slit is used to form a circumferential air chamber for supplying air to the slit. It is characterized by being constructed by assembling an insert body composed of a stepped portion and a plurality of convex portions to a plunger .
[0009]
If the gap between the slits is 0.05 mm or more, the carbon generated in the molding process is clogged and air is not easily blown out. This is because the die machining accuracy is limited, and the reason why it is 0.8 mm or less is that if it is more than this, the traces of the slits appear clearly on the glass product and the appearance of the product is impaired. Preferably, the slit gap is 0.2 mm to 0.6 mm.
[0010]
【Example】
The present invention will be described below with reference to the embodiments of the drawings. FIG. 1 is a cross-sectional view of the press molding apparatus of the present invention, and shows a state where the plunger 3 is lowered and the glass product 5 is press molded. The plunger 3 is attached to the plunger cap 1 with a plurality of mounting bolts 2, and the plunger cap 1 is connected to a press cylinder (not shown) that raises and lowers the plunger 3 together with the metal eye 4. Reference numeral 6 denotes a body mold, which is constituted by the plunger 3 and the metal 4 to determine the shape of the glass product, and is a general press-molding configuration, and detailed description thereof is omitted.
[0011]
FIG. 2A is an enlarged cross section of the insert body 12 that is fitted and fixed in the center of the plunger 3 in order to form the slit 17 that blows out the air of the present invention in the vicinity of the center of the tip surface portion 3a of the plunger 3. The figure is shown. The insert body 12 includes a screw portion 13 that is screwed into the plunger 3, a pedestal portion that sandwiches the packing member 15, and a step portion and a slit that constitute a circumferential air chamber 16 for supplying air to the slit 17. 17 is composed of a plurality of convex portions 19 (six in the embodiment) for accurately configuring 17. The outer diameter of the convex portion 19 is a size that is fitted in close contact with the inner diameter drilled in the plunger 3.
[0012]
On the other hand, an air supply passage 11 communicating with a circumferential air chamber 16 constituted by an insert body 12 assembled to the plunger 3 is formed in a side body portion of the plunger 3 to block ventilation from outside after the formation. The padding 18 is applied. The air supply path 11 is provided with an air supply path 10 that communicates with the top surface of the plunger 3 and an air supply path 9 that communicates with the plunger cap 1. An air hose 8 is provided at a predetermined timing from an air supply source (not shown). And air is supplied via the air hose attachment 7.
[0013]
As shown in FIG. 1 and FIG. 2A, the plunger 3 and the insert body 12 are assembled by holding the packing member 15 between the lower pedestal portion of the screw portion 13, the screw portion 13, and the screw portion 13 provided on the plunger. It is desirable that the inner surface portion 3b of the plunger and the weld 14 be applied in order to prevent loosening during molding. In addition, it is desirable to select a relatively soft metal such as copper or aluminum for the packing member 15, and the pitch of the screw portions 13 and 13 ′ stabilizes the fit of the insert body 12, thereby improving the adhesion with the packing member 15. In order to ensure, it is good to set it as 1.5-2.0 mm. FIG. 2B shows the state of the plunger 3 in the direction of the tip of the plunger 3 in the insert body 12 (relevant portions of the plunger 3 are indicated by a two-dot chain line).
[0014]
Next, the operation content of the present invention will be described. First, the gob is supplied to the body mold 6, the plunger 3 and the metal 4 are simultaneously lowered, the gob is pressed, and the glass product 5 is formed together with the body mold 6. Next, the metal eye 4 rises slightly behind the plunger 3 and the glass product 5 is released from the plunger 3. Air is supplied from an air supply source (not shown) via the air hose 8 and the air supply paths 9, 10 and 11 so that air blows out from the slit 17 of the present invention at the same time as the plunger 3 starts to rise. The air pressure at this time is preferably 0.5 to 1.5 kg / cm 2 . This is because if the air pressure is too high, the glass product 5 that is still soft immediately after formation may be deformed, and if it is too low, the release effect is impaired.
[0015]
[Action]
The glass product press molding apparatus of the present invention configured as described above prevents the glass product from being lifted by lift due to the vacuum phenomenon when the plunger is lifted after pressing by pressing the glass product with the air blown from the slit. Therefore, the release of the glass product from the plunger can be reliably stabilized. Therefore, when molding a product with a flat bottom surface and a large bottom area, such as dish bowls, the lifting speed of the plunger does not need to be slow and time-consuming to lift, so the molding speed is increased. In addition, the troubles of molding can be greatly reduced.
[0016]
【The invention's effect】
As described above, the glass product press molding apparatus of the present invention can stably release the plunger and the glass product after press molding in a short time, thereby improving the molding speed and improving the quality. It became possible to plan. Accordingly, the present invention contributes to the industry as a solution to the conventional problems.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
2A is an enlarged sectional view showing an insert body according to an embodiment of the present invention, and FIG. 2B is a view as viewed from the direction of the plunger tip surface of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plunger cap 2 Mounting bolt 3 Plunger 4 Metal plate 5 Glassware 6 Drum type 9, 10, 11 Air supply path 12 Insert body 13, 13 'Screw part 14 Welding 15 Packing member 16 Air chamber 17 Slit 18 Filling 19 Protrusion part

Claims (1)

胴型に供給された所定重量の溶融ガラス塊(ゴブ)をプランジャでプレスして成形するガラス製品のプレス成形において、プランジャのプレス先端面部にエアを吹き出すことができ、該吹き出し口の間隙が0.05mm〜0.8mmであるスリットを設けるとともに、該スリットは、スリットにエアを供給する為の円周状のエアチャンバを構成するための段部と複数の凸部から構成されているインサート体をプランジャに組み付けて構成されるものであることを特徴とするガラス製品のプレス成形装置。In press molding of a glass product in which a molten glass lump (gob) having a predetermined weight supplied to a barrel mold is pressed by a plunger, air can be blown to the press front end portion of the plunger, and the gap between the blowout ports is 0. a with slits is .05Mm~0.8Mm, the slit, the insert body and a stepped portion and a plurality of protrusions for forming the circumferential air chamber for supplying air to the slits A glass product press-molding apparatus, characterized in that it is constructed by assembling a plunger on a plunger .
JP25289994A 1994-09-20 1994-09-20 Glass product press molding equipment Expired - Lifetime JP3727677B2 (en)

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JP25289994A JP3727677B2 (en) 1994-09-20 1994-09-20 Glass product press molding equipment

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Application Number Priority Date Filing Date Title
JP25289994A JP3727677B2 (en) 1994-09-20 1994-09-20 Glass product press molding equipment

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JPH0891853A JPH0891853A (en) 1996-04-09
JP3727677B2 true JP3727677B2 (en) 2005-12-14

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