JPH02251335A - Manufacture of mold for casting metallic mold for forming tyre - Google Patents
Manufacture of mold for casting metallic mold for forming tyreInfo
- Publication number
- JPH02251335A JPH02251335A JP1072845A JP7284589A JPH02251335A JP H02251335 A JPH02251335 A JP H02251335A JP 1072845 A JP1072845 A JP 1072845A JP 7284589 A JP7284589 A JP 7284589A JP H02251335 A JPH02251335 A JP H02251335A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sipes
- chaplet
- casting
- tire
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000005266 casting Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 abstract description 14
- 239000012778 molding material Substances 0.000 abstract description 7
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000011505 plaster Substances 0.000 description 10
- 238000007796 conventional method Methods 0.000 description 4
- 239000007943 implant Substances 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
- 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】
（産業上の利用分野）
本発明はタイヤ成形用金型を鋳造するための鋳型の製作
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a mold for casting a tire mold.
（従来の技術）
タイヤの表面に幅が１−程度の細いスリットを形成する
ためには、タイヤ成形用金型の表面にもこれに対応する
肉薄の突辺を突設しておく必要があり、多くはステンレ
ススチール製のサイプと呼ばれる金属片が用いられてい
る。このサイプをアルミニウム合金からなるタイヤ成形
用金型の表面に植え込むために従来行われていた方法は
、まずタイヤの形状に対応させた石膏製の鋳型の表面に
サイプを植え込み、この石膏鋳型にアルミニウム合金を
流し込んでタイヤ成形用金型を鋳造すると同時に鋳型表
面のサイプをタイヤ成形用金型側へ反転する方法であっ
た。(Prior art) In order to form a narrow slit with a width of about 1 mm on the surface of a tire, it is necessary to protrude a corresponding thin protrusion on the surface of the tire mold. A metal piece called a stainless steel sipe is often used. The conventional method for implanting these sipes into the surface of a tire mold made of aluminum alloy is to first implant the sipes onto the surface of a plaster mold that corresponds to the shape of the tire, and then insert the aluminum This was a method in which the alloy was poured into a tire mold, and at the same time the sipes on the surface of the mold were turned over to the tire mold.
ところがこのような従来法においては、可塑性のない石
膏製の鋳型の表面にサイズを所要の深さまで埋め込む必
要があるので、予め石膏の表面に溝を形成しておいても
なおサイプの差込みの際に石膏の表面が割れ易く、また
サイプの差込みに多くの手数を要するという問題があっ
た。However, in this conventional method, it is necessary to embed the size into the surface of the non-plastic plaster mold to the required depth, so even if the grooves are formed in the plaster surface in advance, it is difficult to insert the sipes. There was a problem that the surface of the plaster was easily cracked and that it required a lot of work to insert the sipes.
（発明が解決しようとする課題）
本発明は上記のような従来の問題点を解決して、サイプ
が埋め込まれた石膏等からなる鋳型を能率的に製作する
ことができるタイヤ成形用金型を鋳造するための鋳型の
製作方法を提供するために完成されたものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides a tire molding mold that can efficiently produce a mold made of plaster or the like with embedded sipes. It was completed to provide a method for manufacturing molds for casting.
（課題を解決するための手段）
上記の課題は、タイヤ成形用金型を鋳造するための鋳型
を製作する際に、この鋳型材よりも弾力性に富む材質か
らなる反転用の型の表面に鋳ぐるみ用サイプを植え込ん
だうえで鋳型材を注入し、形状を反転すると同時に鋳ぐ
るみ用サイプを鋳型に移すことを特徴とする方法によっ
て達成することができる。(Means for Solving the Problems) The above problem occurs when manufacturing a mold for casting a tire mold. This can be achieved by a method characterized by implanting a casting sipe, injecting a mold material, reversing the shape, and simultaneously transferring the casting sipe to the mold.
本発明において用いられる反転用の型及び鋳型の材質は
必ずしも限定されるものではないが、実用上はそれぞれ
ラバーと石膏を用いることが便利であるので、以下にこ
のような材質を用いた実施例によって、本発明を更に詳
細に説明する。The materials of the inversion mold and casting mold used in the present invention are not necessarily limited, but it is convenient to use rubber and plaster, respectively, so below are examples using such materials. The present invention will be explained in more detail below.
（実施例）
まず第１図のようにトレッドパターンを備えたマスター
モデル（１）を製作し、バッキング（２）との間のキャ
ビティにシリコンラバー（３）を注入して固化させる。(Example) First, a master model (1) with a tread pattern as shown in Fig. 1 is manufactured, and silicone rubber (3) is injected into the cavity between it and the backing (2) and solidified.
次にマスターモデル（１）の表面からシリコンラバー（
３）を剥すと、第２図に示されるような弾力性に富むラ
バー型（４）が得られるので、このラバー型（４）の表
面にサイプ（５）を植え込む。なおラバー型（４）の表
面には予めサイプ植え込み用のスリットを形成しておく
ものとし、このスリットは当然にマスターモデル（１）
によってラバー型（４）に形成されるものである。この
ようなサイプ（５）の植え込みは弾力性に冨むシリコン
ラバー製のラバー型（４）に対して行われるので、従来
のようにサイプ（５）を石膏型に植え込む場合のように
型が割れたりするおそれもなく、極めて能率的に行うこ
とができる。次に第３図のようにサイプ植え込みの終了
したラバー型（４）をバッキング（２）とともに枠（６
）にセットし、その内部に石膏のような鋳型材（７）を
注入して固化させる。そして鋳型材（７）の固化後にラ
バー型（４）を剥離すると、ラバー型（４）の内面形状
はそのまま石膏製の鋳型（８）の表面に反転されると同
時に、ラバー型（４）の表面に植え込まれていたサイプ
（５）も鋳型（８）の表面にそのまま反転される。この
結果、第４図に示されるように表面にサイプ（５）が埋
め込まれた石膏製の鋳型（８）を得ることができる。そ
の後、常法に従ってこの鋳型（８）を図示されない治具
の内部にセットしてアルミニウム合金を鋳込むと、第５
図に示されるようなタイヤ成形用金型（９）が得られる
が、この際に鋳型（８）の表面のサイプ（５）は更にタ
イヤ成形用金型（９）側へ反転するので、サイプ（５）
が埋め込まれたタイヤ成形用金型（９）が得られること
となる。Next, apply silicone rubber (
When 3) is peeled off, a highly elastic rubber mold (4) as shown in FIG. 2 is obtained, and a sipe (5) is implanted on the surface of this rubber mold (4). In addition, a slit for implanting the sipes shall be formed in advance on the surface of the rubber mold (4), and this slit is naturally attached to the master model (1).
It is formed into a rubber mold (4) by. The sipes (5) are implanted into a rubber mold (4) made of highly elastic silicone rubber. This can be done extremely efficiently without the risk of breakage. Next, as shown in Figure 3, the rubber mold (4) with the sipes implanted is placed in the frame (6) together with the backing (2).
), and a molding material (7) such as plaster is injected into it and solidified. When the rubber mold (4) is peeled off after the mold material (7) has solidified, the inner shape of the rubber mold (4) is reversed onto the surface of the plaster mold (8), and at the same time, the rubber mold (4) is The sipes (5) implanted on the surface are also turned over onto the surface of the mold (8). As a result, a plaster mold (8) having sipes (5) embedded in its surface can be obtained as shown in FIG. Thereafter, this mold (8) is set inside a jig (not shown) and aluminum alloy is cast in accordance with the usual method.
A tire molding mold (9) as shown in the figure is obtained, but at this time, the sipes (5) on the surface of the mold (8) are further turned over to the tire molding mold (9) side, so the sipes (5)
A tire molding mold (9) in which is embedded is obtained.
なおサイプ（５）の方向が鋳型（８）とラバー型（４）
との離型方向に対して±３０°を越える場合には、ラバ
ー型（４）から鋳型（８）へのサイプ（５）の反転が円
滑に行われなくなるおそれがある。従って鋳型（８）に
おいてタイヤのショルダ一部に相当する部分に対しては
従来法によりサイプ（５）の植え込みを行うことが好ま
しい。Note that the direction of the sipe (5) is the mold (8) and the rubber mold (4).
If the angle exceeds ±30° with respect to the mold release direction, there is a risk that the sipe (5) may not be smoothly reversed from the rubber mold (4) to the mold (8). Therefore, it is preferable to implant the sipes (5) in a portion of the mold (8) corresponding to a portion of the shoulder of the tire by a conventional method.
（発明の効果）
本発明は以上の説明から明らかなように、石膏のような
鋳型材に直接サイプを植え込むのではなく、この鋳型材
よりも弾力性に冨む材質からなる反転用の型の表面にサ
イプを植え込んでこれを反転させる方法であるから、従
来のようにサイプ植え込み時に鋳型の表面が割れること
がな（、またラバーのような弾力性の材質に対してサイ
プを植え込めばよいので、サイプの差込みに手数を要し
ない。よって本発明は従来の問題点を一掃したタイヤ成
形用金型を鋳造するための鋳型の製作方法として、産業
の発展に寄与するところは極めて大である。(Effects of the Invention) As is clear from the above description, the present invention does not directly implant sipes into a molding material such as plaster, but instead uses a reversing mold made of a material that is more elastic than the molding material. Since this is a method of implanting sipes on the surface and inverting them, the surface of the mold does not crack when implanting the sipes as in the past (also, it is easier to implant sipes into elastic materials such as rubber). Therefore, it does not require any effort to insert the sipes.Therefore, the present invention greatly contributes to the development of industry as a method of manufacturing a mold for casting a tire mold, which eliminates the problems of the conventional method. .
第１図〜第５図はいずれも本発明の詳細な説明する断面
図である。
（５）：サイプ、（７）；鋳型材、（８）：鋳型、（９
）：タイヤ成形用金型。1 to 5 are cross-sectional views explaining the present invention in detail. (5): Sipe, (7); Mold material, (8): Mold, (9
): Mold for molding tires.
Claims (1)
、この鋳型材よりも弾力性に富む材質からなる反転用の
型の表面に鋳ぐるみ用サイプを植え込んだうえで鋳型材
を注入し、形状を反転すると同時に鋳ぐるみ用サイプを
鋳型に移すことを特徴とするタイヤ成形用金型を鋳造す
るための鋳型の製作方法。When manufacturing a mold for casting a tire mold, sipes for casting are implanted into the surface of an inversion mold made of a material with more elasticity than this mold material, and then the mold material is injected. , A method for manufacturing a mold for casting a tire molding die, characterized by reversing the shape and simultaneously transferring a casting sipe to the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1072845A JPH02251335A (en) | 1989-03-24 | 1989-03-24 | Manufacture of mold for casting metallic mold for forming tyre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1072845A JPH02251335A (en) | 1989-03-24 | 1989-03-24 | Manufacture of mold for casting metallic mold for forming tyre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02251335A true JPH02251335A (en) | 1990-10-09 |
Family
ID=13501131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1072845A Pending JPH02251335A (en) | 1989-03-24 | 1989-03-24 | Manufacture of mold for casting metallic mold for forming tyre |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02251335A (en) |
-
1989
- 1989-03-24 JP JP1072845A patent/JPH02251335A/en active Pending
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