JPS62199241A - Vent hold forming method for type mold - Google Patents
Vent hold forming method for type moldInfo
- Publication number
- JPS62199241A JPS62199241A JP61041309A JP4130986A JPS62199241A JP S62199241 A JPS62199241 A JP S62199241A JP 61041309 A JP61041309 A JP 61041309A JP 4130986 A JP4130986 A JP 4130986A JP S62199241 A JPS62199241 A JP S62199241A
- Authority
- JP
- Japan
- Prior art keywords
- tire mold
- groove
- tire
- mold
- tubular body
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title description 5
- 239000011505 plaster Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 18
- 239000010440 gypsum Substances 0.000 claims description 18
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 2
- 210000000988 bone and bone Anatomy 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
〔従来の技術〕
一般にタイヤを形成すむには、タイヤと同じ外形の石膏
中子をつくり、平盤と型枠よりなる主型が前記石膏中子
を包囲して形成される中空部に、アルミニュウム合金等
の溶融金属を注入して凝固してなるタイヤモールドが用
いられる。[Detailed Description of the Invention] [Prior Art] Generally, in order to form a tire, a gypsum core having the same external shape as the tire is made, and a main mold consisting of a flat plate and a mold surrounds the gypsum core. A tire mold is used, which is made by injecting molten metal such as aluminum alloy into a hollow part and solidifying it.
このタイヤモールドには、生ゴムを加硫してタイヤ形成
するために必要な空気の圧力をタイヤの内側から外周に
向かってかけてタイヤの外形を形成するが、このときタ
イヤ外表面とタイヤモールドの間に封じこめられた空気
と加硫により生ゴムの間から発生するガスを抜くために
、ベントホールと称する多数の小孔が半径方向に貫通し
て形成されている。In this tire mold, the air pressure necessary to vulcanize the raw rubber and form the tire is applied from the inside of the tire toward the outer circumference to form the tire's outer shape. At this time, the outer surface of the tire and the tire mold are A large number of small holes called vent holes are formed to penetrate in the radial direction in order to release the air trapped between the raw rubber and the gas generated from the raw rubber during vulcanization.
このため、前記タイヤモールドによる加硫済みのタイヤ
外表面には、前記ベントホールに流れ込むスピユーと称
するゴムの突出物が多数形成されタイヤの外観を損なう
ので切削除去する必要が生ずる。For this reason, a large number of rubber protrusions called spews that flow into the vent holes are formed on the outer surface of the tire that has been vulcanized by the tire mold, impairing the appearance of the tire, and therefore need to be removed.
そこでタイヤの溝に対応するタイヤモールドの突出した
骨部に、タイヤの表面と平行方向に延びるベントホール
を形成し、タイヤの溝内にスピユーを形成する方法が考
えられている。Therefore, a method has been considered in which a vent hole extending in a direction parallel to the tire surface is formed in a protruding bone portion of a tire mold corresponding to the tire groove, and a spew is formed in the tire groove.
このベントホールを形成する従来の方法とじて石膏中子
の表面溝の対向する側壁に多数の凹所を形成し、この対
向する各月の凹所に線条体の両端部をそれぞれ挿入埋設
して溝をまたがって橋渡しするものである。The conventional method for forming these vent holes is to form a number of recesses in the opposing side walls of the surface groove of the gypsum core, and insert and bury both ends of the filament into each of the opposing recesses. It bridges the gap.
この線条体は、ワイヤ、虫ピン、針金等の線材と、タイ
ヤモールド凝固後、これを抜き易いように前記線材の表
面に付着された耐熱性の固体潤滑層とによって形成され
る。The filament is formed of a wire such as a wire, insect pin, wire, etc., and a heat-resistant solid lubricant layer attached to the surface of the wire so that it can be easily removed after the tire mold is solidified.
この線条体によるベントホールは、できるだけタイヤの
溝の外周に近いところに設けて空気及びガスの除去効果
を高めるために、タイヤの溝と補完関係にあるモールド
の骨部の基端に形成する必要がある。The vent holes made of these striated bodies are formed as close to the outer periphery of the tire groove as possible to enhance the effect of removing air and gas, and are formed at the proximal end of the bone part of the mold in a complementary relationship with the tire groove. There is a need.
そのため、この線条体は石膏中子の表面の溝に橋渡しさ
れてその両端部を凹部に石膏で固着された後、鋳造によ
ってタイヤモールドの骨部の基端に鋳ぐるまれ、しかる
後この線条体をタイヤモールドから引き抜くことによっ
てタイヤモールドにベントホールが形成される。Therefore, this filament is bridged by the groove on the surface of the plaster core, its both ends are fixed in the recess with plaster, and then cast into the proximal end of the bone part of the tire mold. A vent hole is formed in the tire mold by pulling the strip out of the tire mold.
〔発明が解決しようとする問題点〕
このように線条体はタイヤモールドの骨部の基端に設け
られているので、これを引き抜く作業が困難である。[Problems to be Solved by the Invention] Since the filamentous body is thus provided at the proximal end of the bone portion of the tire mold, it is difficult to pull it out.
すなわち、線条体は前述のように金属の線材でできてお
り、線条体の両端は前記骨部の両側にあられれ、これを
タイヤモールドから引き抜くには、前記線材へのコーテ
ィングが余程上手にできていないと摩擦のために引き抜
くのが難しい。That is, as mentioned above, the filament is made of a metal wire, and both ends of the filament are on both sides of the bone, and in order to pull it out of the tire mold, the coating on the wire must be too thick. If not done properly, it will be difficult to pull it out due to friction.
それだけでなく、この線条体は、前記タイヤモールドの
骨部基端から引き抜くことになるので、これはタイヤモ
ールドの骨部と骨部との谷間で行われ、作業を一層困難
にする。Moreover, since the filament is pulled out from the proximal end of the tire mold bone, this is done in the valley between the tire mold bones, making the work even more difficult.
本発明はこのようなタイヤモールド用ベントホールの形
成方法において、ベントホール形成用線条体をモールド
の骨部基端から引き抜く作業に困難性が伴うという問題
点を解決することを目的とする。An object of the present invention is to solve the problem in such a method of forming a vent hole for a tire mold that it is difficult to pull out the vent hole forming filament from the proximal end of the bone part of the mold.
上記問題点を解決するため本発明は次のようなタイヤモ
ールド用ベントホールの形成方法を提供する。すなわち
本発明は
タイヤモールド用石膏中子の表面の溝の対向する側壁上
部に多数対の凹部を形成し、このそれぞれ相対する凹部
間に管状体の両端部をとりつけて前記溝の上部に多数の
管状体を橋状に形成した後、この管状体を橋状に形成し
た石膏中子を環状に配し、中子と主型とで形成さた空間
に溶融したアルミニューム合金を流し込んでタイヤモー
ルドを鋳造して、前記タイヤモールド内に鋳ぐるまれた
管状体によりベントホールを形成することを特徴とする
、タイヤモールド用ベントホールの形成方法である。In order to solve the above problems, the present invention provides the following method for forming a vent hole for a tire mold. That is, in the present invention, a large number of pairs of recesses are formed in the upper part of opposing side walls of a groove on the surface of a gypsum core for a tire mold, and both ends of a tubular body are attached between the opposing recesses, so that a large number of pairs of recesses are formed in the upper part of the groove. After forming the tubular body into a bridge shape, a gypsum core formed by forming the tubular body into a bridge shape is arranged in a ring shape, and molten aluminum alloy is poured into the space formed by the core and the main mold to form a tire mold. This is a method for forming a vent hole for a tire mold, characterized in that the vent hole is formed by a tubular body cast into the tire mold.
管状体をタイヤモールドに鋳ぐるむと、管状体は引き抜
くことはせず、管状体の有する軸方向の長孔が、そのま
まベントホールを形成する。When the tubular body is cast into a tire mold, the tubular body is not pulled out, and the long hole in the axial direction of the tubular body forms a vent hole as it is.
以下本発明の構成が実際上どのように具体化されるかを
その作用とともに説明する。Hereinafter, how the configuration of the present invention is actually implemented will be explained along with its operation.
第１図は本発明の一実施例で、図中１はタイヤと同じ外
形の石膏中子である。この石膏中子１は、平盤２と型枠
３よりなる主型４に旬間されて中空部５を形成する。こ
の中空部５にアルミニューム合金等の溶融金属を注入す
ると、アルミニューム合金は時間の経過とともに凝固し
てタイヤモールド６を形成する。FIG. 1 shows an embodiment of the present invention, in which numeral 1 indicates a gypsum core having the same external shape as a tire. This gypsum core 1 is placed in a main mold 4 consisting of a flat plate 2 and a mold 3 to form a hollow part 5. When molten metal such as aluminum alloy is injected into this hollow portion 5, the aluminum alloy solidifies over time to form a tire mold 6.
８は石膏中子１の表面７に設けた溝で、溝８にまたがっ
て管状体９が設けられている。8 is a groove provided on the surface 7 of the gypsum core 1, and a tubular body 9 is provided astride the groove 8.
第２Ａ図は前記石膏中子１を斜視図で示したもので、表
面７に設けた溝８の側壁１０．１１に凹部１２゜１３を
設け、前記管状体９の両管９ａ、９ｂを該凹部１２゜１
３に置き、石膏等からなる充填材１４．１５を充填して
第２Ｂ図に示されるように管状体９を凹部１２．１３に
固着する。FIG. 2A shows a perspective view of the gypsum core 1, in which a recess 12° 13 is provided in the side wall 10.11 of the groove 8 provided on the surface 7, and both pipes 9a, 9b of the tubular body 9 are connected. Recessed part 12゜1
3, and the tubular body 9 is fixed in the recess 12.13 by filling it with a filler material 14.15 made of gypsum or the like, as shown in FIG. 2B.
この管状体９は前記溝の側壁１０．１１のなるべく表面
７に近い位置にとりつけるのが望ましい。This tubular body 9 is preferably mounted as close as possible to the surface 7 of the side wall 10.11 of the groove.
この管状体９はセラミック又は鉄、アルミニューム合金
その他の合金でつくられる。This tubular body 9 is made of ceramic or iron, aluminum alloy or other alloy.
第３図は鋳造されたタイヤモールド６の斜視図で、第１
図において主型と石膏中子１とによって形成された空間
部５に、アルミニューム合金等の溶融金属を流し込んで
つくられたタイヤモールド６は、面形状が第２Ａ図に示
す石膏中子１の凹凸と逆になり、第２Ａ図の凹状の溝８
は第３図では凸状をなす骨部１６を形成している。１７
．１８は骨部１６の側面である。FIG. 3 is a perspective view of the cast tire mold 6.
In the figure, a tire mold 6 made by pouring molten metal such as aluminum alloy into a space 5 formed by a main mold and a gypsum core 1 has a surface shape similar to that of the gypsum core 1 shown in FIG. 2A. The concave groove 8 in Fig. 2A is the opposite of the concave and convex part.
In FIG. 3, a convex bone portion 16 is formed. 17
．． 18 is a side surface of the bone portion 16.
また第２八図において溝８の側壁１０．１１に橋をかけ
たようにとりつけられた管状体９は、第３図に示される
ように前記鋳造によってタイヤモールド６内に鋳ぐるま
れることにより、骨部１６の基部にその管状体９自身の
有する長孔でベントホール１９を形成するものである。Further, the tubular body 9 attached to the side wall 10.11 of the groove 8 in a bridge manner in FIG. 28 is cast into the tire mold 6 by the casting process as shown in FIG. , a vent hole 19 is formed at the base of the bone portion 16 by a long hole of the tubular body 9 itself.
なお骨部１６の両側面１７．１８に突出する管状体９の
両側９ａ、９ｂは切りとるなどして除去しておく。Note that both sides 9a and 9b of the tubular body 9 protruding from both sides 17 and 18 of the bone portion 16 are removed by cutting or the like.
以上説明したように１本発明は管状体を石膏中子の溝上
に橋状にとりつけ、この管状体をとりつけた石膏中子主
型によって形成された空間に溶融したアルミニュームを
流し込んでタイヤモールドを形成し、管状体を鋳ぐるむ
ので管状体はその長孔がそのままタイヤモールドのベン
トホールとなり、引き抜き作業が不要となる。そのため
タイヤモールドのベントホールの形成が容易となり且つ
ベントホールはタイヤモールドの骨の形状、寸法及びベ
ントホールの位置、方向にとられれることなく形成する
ことができる。As explained above, one aspect of the present invention is to attach a tubular body to the groove of a gypsum core in the form of a bridge, and pour molten aluminum into the space formed by the main mold of the gypsum core to which the tubular body is attached, thereby forming a tire mold. Since the tube is formed and then cast around the tubular body, the elongated hole in the tubular body directly becomes the vent hole of the tire mold, eliminating the need for extraction work. Therefore, it becomes easy to form a vent hole in the tire mold, and the vent hole can be formed without depending on the shape and size of the tire mold bone and the position and direction of the vent hole.
又、従来の方法のように線条体を引き抜かないのでベン
トホールの小孔の形状は自由なものが得られる等の利点
がある。Further, since the filament is not pulled out as in the conventional method, there is an advantage that the shape of the vent hole can be freely determined.
第１図は本発明の一実施例の側面断面説明図、第２八図
は本発明の一実施例の石膏中子の斜視図、第２Ｂ図は第
２八図の要部斜視図、第３図は第２Ａ図の石膏中子を用
いて鋳造されたタイヤモールドの斜視図である。
１・・・・・・石膏中子、
６・・・・・・タイヤモールド、
９・・・・・・管状体、
１９・・・・・・ベントホール。Fig. 1 is a side sectional explanatory view of one embodiment of the present invention, Fig. 28 is a perspective view of a gypsum core of one embodiment of the present invention, Fig. 2B is a perspective view of the main part of Fig. 28, FIG. 3 is a perspective view of a tire mold cast using the gypsum core of FIG. 2A. 1... Gypsum core, 6... Tire mold, 9... Tubular body, 19... Vent hole.
Claims (1)
部に多数対の凹部を形成し、このそれぞれ相対する凹部
間に管状体の両端部をとりつけて前記溝の上部に多数の
管状体を橋状に形成した後、この管状体を橋状に形成し
た石膏中子を環状に配し、中子と主型とで形成された空
間に溶融したアルミニュームを流し込んでタイヤモール
ドを鋳造して、前記タイヤモールド内に鋳ぐるまれた管
状体によりベントホールを形成することを特徴とする、
タイヤモールド用ベントホールの形成方法。A large number of pairs of recesses are formed in the upper part of opposing side walls of a groove on the surface of a plaster core for a tire mold, and both ends of a tubular body are attached between the respective opposing recesses, so that a large number of tubular bodies are bridged over the upper part of the groove. After forming the tire mold into a shape, a gypsum core made of the tubular body shaped like a bridge is arranged in a ring shape, and molten aluminum is poured into the space formed by the core and the main mold to cast a tire mold. A vent hole is formed by a tubular body cast inside the tire mold,
How to form a vent hole for a tire mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61041309A JPS62199241A (en) | 1986-02-26 | 1986-02-26 | Vent hold forming method for type mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61041309A JPS62199241A (en) | 1986-02-26 | 1986-02-26 | Vent hold forming method for type mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62199241A true JPS62199241A (en) | 1987-09-02 |
| JPS6330097B2 JPS6330097B2 (en) | 1988-06-16 |
Family
ID=12604895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61041309A Granted JPS62199241A (en) | 1986-02-26 | 1986-02-26 | Vent hold forming method for type mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62199241A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01135892U (en) * | 1988-03-10 | 1989-09-18 |
-
1986
- 1986-02-26 JP JP61041309A patent/JPS62199241A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6330097B2 (en) | 1988-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3648760A (en) | Precision investment casting apparatus | |
| JPS6129916B2 (en) | ||
| US4023268A (en) | Method of producing vent holes in tire molds | |
| JPS62199241A (en) | Vent hold forming method for type mold | |
| US4040466A (en) | Investment shell molding process | |
| JPS62199242A (en) | Vent hold forming method for tire mold | |
| JPH0227951Y2 (en) | ||
| JPH0225556Y2 (en) | ||
| JPH0214109A (en) | Method for forming vent hole in rib section of tire vulcanizing mold | |
| GB2078596A (en) | Method of Making a Blade | |
| US1683475A (en) | littell | |
| JPH0338942B2 (en) | ||
| JP2943831B2 (en) | Manufacturing method of composite material | |
| US2834077A (en) | Method of producing patterns for cored castings | |
| JPH0243562Y2 (en) | ||
| JPH0428674Y2 (en) | ||
| JPS6310057A (en) | Manufacture of vulcanizing mold for tyre | |
| JP2553916B2 (en) | Method for manufacturing cast ceramic body | |
| JP2553923B2 (en) | Method for manufacturing cast ceramic body | |
| JPS6057416B2 (en) | Casting method for double-flanked pipes | |
| JP2518573B2 (en) | Casting mold | |
| SU942862A1 (en) | Method of vacuum moulding and equipment for performing same | |
| JPS5811544Y2 (en) | Resin molding equipment | |
| JPS5818990Y2 (en) | mold socket | |
| JP2013169731A (en) | Method of manufacturing mold for tire vulcanization and the mold for tire vulcanization |