JPH05343B2 - - Google Patents

Info

Publication number
JPH05343B2
JPH05343B2 JP63262590A JP26259088A JPH05343B2 JP H05343 B2 JPH05343 B2 JP H05343B2 JP 63262590 A JP63262590 A JP 63262590A JP 26259088 A JP26259088 A JP 26259088A JP H05343 B2 JPH05343 B2 JP H05343B2
Authority
JP
Japan
Prior art keywords
plunger
glass
self
impact strength
fusing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP63262590A
Other languages
Japanese (ja)
Other versions
JPH02111634A (en
Inventor
Akihiko Takahane
Mitsuru Nozawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishizuka Glass Co Ltd
Original Assignee
Ishizuka Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishizuka Glass Co Ltd filed Critical Ishizuka Glass Co Ltd
Priority to JP26259088A priority Critical patent/JPH02111634A/en
Publication of JPH02111634A publication Critical patent/JPH02111634A/en
Publication of JPH05343B2 publication Critical patent/JPH05343B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B9/00Blowing glass; Production of hollow glass articles
    • C03B9/13Blowing glass; Production of hollow glass articles in gob feeder machines
    • C03B9/193Blowing glass; Production of hollow glass articles in gob feeder machines in "press-and-blow" machines
    • C03B9/1932Details of such machines, e.g. plungers or plunger mechanisms for the press-and-blow machine, cooling of plungers
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B9/00Blowing glass; Production of hollow glass articles
    • C03B9/30Details of blowing glass; Use of materials for the moulds
    • C03B9/48Use of materials for the moulds

Landscapes

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

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明はガラス壜をプレスブロー成形する際に
用いられるガラス成形用プランジヤーの改良に関
するものである。 (従来の技術) ガラス壜のプレスブロー成形用のプランジヤー
は高温の溶融ガラスと直接接触してパリソンを成
形する金型であるため、耐熱鋼製の母材の表面に
C0系の自溶性合金又はNi−Cr系の自溶性合金を
0.5mm程度の厚さに肉盛りして耐熱性や耐摩耗性
を高める工夫がなされている。(例えば、特開昭
54−146818号公報) ところがNi−Cr系の自溶性合金は耐酸化性が
低いためにプランジヤーの表面が酸化され、表面
から剥離した酸化スケールが成形されたガラス壜
の内表面に付着し、ガラス壜の内表面に微細な傷
を付けてガラス壜の衝撃強度を低下させる原因と
なつていた。またC0系の自溶性合金はNi−Cr系
のものに比較して耐酸化性は優れている反面、高
温における強度が低いために成形中にガラスによ
つてプランジヤーの表面が徐々に削り取られ、削
り取られた金属粉がガラス壜の内表面に付着して
上記したと同様にガラス壜の衝撃強度を低下させ
ていた。 (発明が解決しようとする課題) 本発明はこのような従来の問題点を解決して、
プランジヤーの表面から酸化スケールや金属粉が
発生することを防止し、これによつて成形された
ガラス壜の衝撃強度を著しく向上させることがで
きるガラス成形用プランジヤーを提供するために
なされたものである。 (課題を解決するための手段) 本発明は、Cr3C2を10〜90(重量)%含有する
C0系自溶性合金を、耐熱鋼製の母材の表面に肉
盛りしたことを特徴とするものである。 本発明において用いられるCr3C2は融点1890℃
の耐熱性、耐酸化性、高温強度に優れた堅い薄片
状の物質であり、しかも従来からのプランジヤー
表面の肉盛りに使用されているC0系自溶性合金
に対する親和性に優れている。Cr3C2は粉末の形
でC0系自溶性合金の粉末に混入され、例えば
SCM−21のような耐熱鋼製の母材の表面に肉盛
りされる。Cr3C2はプランジヤーの表面の耐熱
性、高温強度を向上させるうえで大きい効果を発
揮するが、10%未満では高温強度を向上させる効
果が不十分であり、また90%を越えるとピンホー
ル等が増加してスムーズな表面が得られなくなる
ので10〜90%の範囲内とすることが必要である。 またC0系自溶性合金としては、C0を30%以上
含有するステライト6、ステライト20などの各
種の組成の自溶性合金を用いることができる。こ
のようなC0系自溶性合金とCr3C2との混合物は母
材の表面にフレーム溶射、プラズマ溶射、ジエツ
ト溶射、爆発溶射等の溶射法によつて肉盛りされ
るが、このほかHIP処理、肉盛溶接等の方法で肉
盛りしてもよい。肉盛り厚さは特に限定されるも
のではないが、従来どおり0.5mm前後とすれば十
分である。 (作用) 本発明においては以上に記したように耐熱性、
耐酸化性に優れたC0系自溶性合金に硬度の大き
いCr3C2を10〜90%含有させたものを使用したの
で高温強度を大幅に向上させることができ、高温
のガラスによつても酸化されたりプランジヤーの
表面が削られたりすることがない。従つて本発明
のプランジヤーを用いて成形されたガラス壜は内
表面が酸化スケールや金属粉によつて傷付けられ
ることがなく、従来のプランジヤーを用いて成形
されたガラス壜に比較して衝撃強度を2倍程度ま
で向上させることが可能である。 以下に本発明の効果を実施例のデータによつて
具体的に示す。 (実施例) 実施例 1 Cr26%(重量)、W5%、C1%、残部C0からな
るステライト6と呼ばれるC0系自溶性合金粉末
80部と、Cr3C2粉末20部との混合物をSCM−21製
の母材の表面にプラズマ溶射法により溶射し、厚
さ0.5mmの肉盛り層を形成した。 このプランジヤーを用いて重量170gr、内容量
300c.c.のガラス壜をプレスブロー成形した。成形
されたガラス壜中20本をサンプリングし、その衝
撃強度を測定したところ、インチ−ポンドの単位
で最低10.2、最大18.1、平均16.5の値が得られた。
これは従来のNi−Cr系合金を溶射したプランジ
ヤーを用いて成形されたガラス壜の衝撃強度が最
低5.7、最大8.7、平均7.7であつたのに比較して、
約2倍の値である。 またプランジヤーを700℃の酸化雰囲気炉中で
5時間加熱し、その表面粗さの変化を測定したと
ころ加熱前が0.2μ、加熱後が0.4μ、硬度はHv=
780であつた。これに対して従来のNi−Cr系自溶
性合金を用いたプランジヤーとCr3C2を含まない
C0系自溶性合金を用いたプランジヤーに対して
同一条件のテストを行つたところ、次のとおりの
結果となつた。
(Industrial Application Field) The present invention relates to an improvement in a glass molding plunger used in press blow molding a glass bottle. (Prior art) A plunger for press-blow molding glass bottles is a mold that forms a parison by directly contacting high-temperature molten glass.
C0 - based self-fusing alloy or Ni-Cr-based self-fusing alloy
Efforts have been made to increase heat resistance and abrasion resistance by building up the material to a thickness of approximately 0.5 mm. (For example,
(No. 54-146818) However, since Ni-Cr self-fusing alloys have low oxidation resistance, the surface of the plunger is oxidized, and the oxide scale that has peeled off from the surface adheres to the inner surface of the molded glass bottle, causing the glass to deteriorate. This caused minute scratches on the inner surface of the bottle, reducing the impact strength of the glass bottle. Furthermore, although C0 - based self-fusing alloys have superior oxidation resistance compared to Ni-Cr-based alloys, their strength at high temperatures is low, so the surface of the plunger is gradually scraped off by glass during molding. The scraped metal powder adhered to the inner surface of the glass bottle, reducing the impact strength of the glass bottle in the same way as described above. (Problem to be solved by the invention) The present invention solves these conventional problems, and
This invention was made in order to provide a plunger for glass molding that can prevent oxide scale and metal powder from being generated from the surface of the plunger, thereby significantly improving the impact strength of molded glass bottles. . (Means for Solving the Problems) The present invention contains 10 to 90% (by weight) of Cr 3 C 2
It is characterized by a C 0 self-fusing alloy built up on the surface of a heat-resistant steel base material. Cr 3 C 2 used in the present invention has a melting point of 1890°C
It is a hard, flaky material with excellent heat resistance, oxidation resistance, and high-temperature strength, and is also highly compatible with C 0 self-fusing alloys, which are conventionally used for overlaying the surface of plungers. Cr 3 C 2 is mixed in powder form with the powder of C 0 self-fluxing alloy, e.g.
It is built up on the surface of a heat-resistant steel base material such as SCM-21. Cr3C2 has a great effect on improving the heat resistance and high-temperature strength of the plunger surface, but if it is less than 10%, the effect of improving high - temperature strength is insufficient, and if it exceeds 90%, pinholes may occur. etc., and it becomes impossible to obtain a smooth surface, so it is necessary to keep it within the range of 10 to 90%. Further, as the C 0 -based self-fusing alloy, self-fusing alloys having various compositions such as Stellite 6 and Stellite 20 containing 30% or more of C 0 can be used. Such a mixture of C 0 -based self-fluxing alloy and Cr 3 C 2 is deposited on the surface of the base material by thermal spraying methods such as flame spraying, plasma spraying, jet spraying, and explosive spraying. Overlay may be applied by a method such as processing or overlay welding. The build-up thickness is not particularly limited, but it is sufficient to set it to around 0.5 mm as usual. (Function) In the present invention, as described above, heat resistance,
By using a C0 - based self-fluxing alloy with excellent oxidation resistance and containing 10 to 90% of Cr3C2 , which has a high hardness, high-temperature strength can be greatly improved. The plunger will not be oxidized or the surface of the plunger will be scratched. Therefore, the inner surface of the glass bottle molded using the plunger of the present invention is not damaged by oxide scale or metal powder, and has higher impact strength than glass bottles molded using the conventional plunger. It is possible to improve it to about twice as much. The effects of the present invention will be specifically illustrated below using data from examples. (Example) Example 1 Co - based self-fusing alloy powder called Stellite 6, consisting of 26% Cr (weight), 5% W, 1% C, and the balance C0
A mixture of 80 parts of Cr 3 C 2 powder and 20 parts of Cr 3 C 2 powder was sprayed onto the surface of a base material made of SCM-21 by plasma spraying to form a built-up layer with a thickness of 0.5 mm. Weight 170gr, inner volume using this plunger
A 300 c.c. glass bottle was press blow molded. When 20 molded glass bottles were sampled and their impact strength measured, the minimum value was 10.2, the maximum value was 18.1, and the average value was 16.5 in inch-pounds.
This is compared to the impact strength of glass bottles formed using conventional plungers sprayed with Ni-Cr alloy, which had a minimum impact strength of 5.7, a maximum impact strength of 8.7, and an average of 7.7.
This is approximately twice the value. In addition, the plunger was heated in an oxidizing atmosphere furnace at 700℃ for 5 hours, and the change in surface roughness was measured. It was 0.2μ before heating and 0.4μ after heating, and the hardness was Hv=
It was 780. In contrast, plungers that use conventional Ni-Cr self-fluxing alloys and do not contain Cr 3 C 2
When a plunger using a C 0 self-fluxing alloy was tested under the same conditions, the following results were obtained.

【表】 実施例 2 Cr33%、W18%、C2.5%、残部C0からなるス
テライト20と呼ばれるC0系自溶性合金粉末70
部にCr3C2粉末30部を混入し、SKD−11製の母材
の表面にプラズマ溶射した。このプランジヤーを
用いて実施例1と同一条件でガラス壜のプレスブ
ロー成形を行つたところ、成形されたガラス壜の
衝撃強度は20本中の最低が12.1、最大が17.8、平
均が17.0であつた。また実施例1と同様にプラン
ジヤーの加熱テストを行つたところ、加熱前の表
面粗さは0.2μ、加熱後は0.4μであり、Hv=800で
あつた。 (発明の効果) 本発明は以上に説明したとおり、Cr3C2をC0
自溶性合金に含有させることにより、耐酸化性を
維持しつつNi−Cr系のものと同様の硬度を得る
ことに成功したものであつて、ガラス成形中の酸
化スケールの発生及び削られた金属粉の発生を防
止し、ガラス壜の衝撃強度の向上に極めて大きい
効果を発揮するものである。よつて本発明は従来
の問題点を解決したガラス成形用プランジヤーと
して、業界に寄与するところは極めて大きいもの
がある。
[Table] Example 2 C0-based self-fusing alloy powder 70 called Stellite 20 , consisting of 33% Cr, 18% W, 2.5% C, and the balance C0
30 parts of Cr 3 C 2 powder was mixed into the sample and plasma sprayed onto the surface of a base material made of SKD-11. When press-blow molding of glass bottles was performed using this plunger under the same conditions as in Example 1, the impact strength of the molded glass bottles was 12.1 for the lowest out of 20 bottles, 17.8 for the highest, and 17.0 for the average. . Further, when the plunger was subjected to a heating test in the same manner as in Example 1, the surface roughness before heating was 0.2μ, after heating was 0.4μ, and Hv=800. (Effects of the Invention) As explained above, the present invention achieves hardness similar to that of Ni-Cr alloys while maintaining oxidation resistance by incorporating Cr 3 C 2 into a C 0 self-fluxing alloy. It has been particularly successful in preventing the generation of oxide scale and scraped metal powder during glass molding, and is extremely effective in improving the impact strength of glass bottles. Therefore, the present invention makes an extremely large contribution to the industry as a glass molding plunger that solves the conventional problems.

【特許請求の範囲】[Claims]

1 閉鎖時にあつて内部に外周部とは不連続の型
同志の密着部を有する胴部割型にゴブを供給し、
セツツルブロー、カウンターブローを行つてなる
胴部に貫通した穴を持つガラス壜の製造方法。 2 閉鎖した割型内に、内部の密着部により分け
られたそれぞれの側に入るように2個のゴブを供
給してなる請求項1記載の胴部に貫通した穴を持
つガラス壜の製造方法。 3 閉鎖する割型の対向面上に、閉鎖時に外周部
とは不連続に互いに密着する密着部を設けてなる
胴部に貫通した穴を持つガラス壜製造用割型の構
造。
1. At the time of closing, a gob is supplied to a body split mold that has a mold-to-mold mold-to-mold part that is discontinuous with the outer periphery inside the mold, and
A method for producing a glass bottle having a hole through the body by performing set blowing and counter blowing. 2. The method for manufacturing a glass bottle having a hole penetrating the body according to claim 1, wherein two gobs are supplied into a closed split mold so as to fit on each side separated by an internal tight part. . 3. Structure of a split mold for manufacturing glass bottles having a hole penetrating the body, which is provided with a close-fitting part discontinuously with the outer periphery and in close contact with each other when closed, on the opposing surface of the split mold to be closed.

JP26259088A 1988-10-18 1988-10-18 Plunger for glass formation Granted JPH02111634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26259088A JPH02111634A (en) 1988-10-18 1988-10-18 Plunger for glass formation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26259088A JPH02111634A (en) 1988-10-18 1988-10-18 Plunger for glass formation

Publications (2)

Publication Number Publication Date
JPH02111634A JPH02111634A (en) 1990-04-24
JPH05343B2 true JPH05343B2 (en) 1993-01-05

Family

ID=17377914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26259088A Granted JPH02111634A (en) 1988-10-18 1988-10-18 Plunger for glass formation

Country Status (1)

Country Link
JP (1) JPH02111634A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443794B2 (en) * 1990-02-20 1999-05-06 Ishizuka Garasu Kabushiki Kaisha Method and apparatus for manufacturing glass containers
GB0911201D0 (en) * 2009-06-30 2009-08-12 Hunprenco Prec Engineers Ltd A coating compositions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEW GLASS TECHNOLOGY=1984 *

Also Published As

Publication number Publication date
JPH02111634A (en) 1990-04-24

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