JP2811001B2 - Manufacturing method of hollow wheel - Google Patents
Manufacturing method of hollow wheelInfo
- Publication number
- JP2811001B2 JP2811001B2 JP1012091A JP1209189A JP2811001B2 JP 2811001 B2 JP2811001 B2 JP 2811001B2 JP 1012091 A JP1012091 A JP 1012091A JP 1209189 A JP1209189 A JP 1209189A JP 2811001 B2 JP2811001 B2 JP 2811001B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- tire
- lower mold
- annular rim
- hollow wheel
- 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 - Fee Related
Links
Landscapes
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Tyre Moulding (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野）本発明は、主として乗用型田植機
等の農業用作業機に装着される中空車輪の製造方法に関
するものである。Description: BACKGROUND OF THE INVENTION (Industrial application field) The present invention relates mainly to a method for manufacturing a hollow wheel mounted on an agricultural working machine such as a riding rice transplanter.
（従来技術）現在、乗用型田植機等の農業用作業機に装
着される中空車輪は、ボスとスポークが一体になった円
環状リムに中空部を有するタイヤを装着したものが使用
されている。(Prior Art) At present, as a hollow wheel mounted on an agricultural working machine such as a riding type rice transplanter, a wheel provided with a tire having a hollow portion on an annular rim in which a boss and a spoke are integrated is used. .
従来、この製造方法は、第７図に示すように、製造す
る車輪の全周を４つに分割した長さの円弧状の凹溝部28
を有する金型27に圧延ゴムを入れ、第８図，第９図に示
すタイヤの左側部29,右側部30をそれぞれ構成する４枚
の側部分29a,30aを未加硫の状態で成形する。次に、こ
のタイヤの側部分29a,側部分30aのそれぞれの内側をカ
ッター等を使用して円弧状に削り凹溝部31を設ける。次
に、凹溝が環状に設けられた左側部の成形型（図示せ
ず）の凹溝に合わせて、前記４枚の側部分29aを置き、
その側部分29a上にボス・スポークが一体型の円環状リ
ム32を載せ、それらの上に４枚の側部分30aを前記側部
分29aと同じように環状に並べて載せ、さらに、その上
に凹溝が環状に設けられた右成形型（図示せず）を被せ
るようにする。そして、円弧状の凹溝部31により構成さ
れている中空部33にエアーコンプレッサー等を使用して
一定圧の圧縮空気を送り込みながら、前記左右成形型に
てプレス成型して、圧延ゴムを加熱することにより加硫
（ゴム分子間を架橋することで強固な結合を作り広い温
度範囲において弾性，引張強さ，耐候性，耐摩耗性等を
付加すること）して第９図及び第10図に示すような中空
部33を有する車輪を製造するものである。Conventionally, as shown in FIG. 7, this manufacturing method employs an arc-shaped concave groove 28 having a length obtained by dividing the entire circumference of a wheel to be manufactured into four.
The rolled rubber is put into a mold 27 having a shape, and the four side portions 29a and 30a constituting the left side portion 29 and the right side portion 30 of the tire shown in FIGS. 8 and 9 are formed in an unvulcanized state. . Next, the inside of each of the side portion 29a and the side portion 30a of the tire is cut into an arc shape using a cutter or the like, and a concave groove portion 31 is provided. Next, the four side portions 29a are placed in accordance with the grooves of the left-side mold (not shown) in which the grooves are annularly provided.
On the side portion 29a is mounted an annular rim 32 of integral boss and spoke, on which the four side portions 30a are arranged annularly in the same manner as the side portion 29a. The groove is to cover a right mold (not shown) provided in an annular shape. Then, while feeding compressed air at a constant pressure using an air compressor or the like into the hollow portion 33 formed by the arc-shaped concave groove portion 31, press-molding with the left and right molding dies to heat the rolled rubber. Vulcanization (cross-linking between rubber molecules to form a strong bond and add elasticity, tensile strength, weather resistance, wear resistance, etc. over a wide temperature range) and are shown in FIGS. 9 and 10. A wheel having such a hollow portion 33 is manufactured.
（発明が解決しようとする課題）しかし、上記の製造方
法により製造された中空車輪は、円弧状の圧延ゴムを複
数枚接合した左右側部を一体化したものである。従っ
て、接合箇所も多く、その接合箇所において空気混入等
による接合不良を生じ易いと言う問題点がある。また、
この方法により中空車輪を製造するには多数の金型が必
要であり、その工程も複雑で、その結果生産コストが高
いという問題点がある。(Problems to be Solved by the Invention) However, the hollow wheel manufactured by the above-described manufacturing method is one in which left and right side portions formed by joining a plurality of arc-shaped rolled rubbers are integrated. Therefore, there is a problem that there are many joining portions, and that joining defects due to air mixing or the like are likely to occur at the joining portions. Also,
In order to manufacture a hollow wheel by this method, a large number of dies are required, and the process is complicated, resulting in a problem of high production cost.
このため本発明は、従来技術における上記問題点に鑑
み、タイヤ部の接合箇所を減らすことにより、接合箇所
における接合不良等のない中空車輪を製造できると共
に、タイヤを製作するために多数の金型を必要としない
中空車輪の製造方法を提供することを目的とするもので
ある。Therefore, the present invention has been made in view of the above-described problems in the prior art, and by reducing the number of joints in the tire portion, it is possible to manufacture a hollow wheel having no joint failure at the joints, and to use a large number of molds for producing the tire. It is an object of the present invention to provide a method of manufacturing a hollow wheel that does not require a wheel.
（問題を解決するための手段）このため本発明では、中
空車輪の製造方法を、まず、下金型，中金型，上金型の
３つの金型間で圧延ゴムを加熱圧着することによりタイ
ヤの左右側部を成形し、そして、中金型を上金型，下金
型よりはずし、圧延ゴムを外周に張付けた円環状リムを
タイヤ左右側部間に装着し、前記タイヤ左右側部を一体
となるように組合わせ、組合わされたタイヤ左右側部と
円環状リムを下金型及び上金型間で圧着し、左右側部の
中空部に蒸気を導入しながら、左右側部を下金型及び上
金型により加硫するようにしたものである。(Means for Solving the Problems) For this reason, in the present invention, a method for manufacturing a hollow wheel is described by first heating and pressing a rolled rubber between three dies, a lower die, a middle die and an upper die. The left and right sides of the tire are molded, the middle mold is removed from the upper mold and the lower mold, and an annular rim with rolled rubber attached to the outer periphery is mounted between the left and right sides of the tire. The left and right sides of the combined tire and the annular rim are crimped between the lower mold and the upper mold, and the left and right sides are joined while introducing steam into the hollow parts on the left and right sides. The vulcanization is performed by a lower mold and an upper mold.
（実施例）以下、本発明の実施例を図面に基づいて説明
する。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明に係る中空車輪を製造するための金型
及び圧延ゴムをプレス装置に配置した状態を示す斜視
図、第２図は第１図のＡ−Ａ断面図、第３図は下金型，
中金型，上金型間に圧延ゴムを挟んだ状態の縦断面図、
第４図は下金型内に予備成形されたタイヤ左側部と円環
状リムを示す斜視図、第５図は本発明に係る中空車輪の
側面図、第６図は第５図のＢ−Ｂ断面図である。FIG. 1 is a perspective view showing a state in which a mold and rolled rubber for manufacturing a hollow wheel according to the present invention are arranged in a press device, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. Lower mold,
Longitudinal sectional view of a state in which rolled rubber is sandwiched between the middle mold and the upper mold,
Fig. 4 is a perspective view showing the left side portion of the tire and the annular rim preformed in the lower mold, Fig. 5 is a side view of the hollow wheel according to the present invention, and Fig. 6 is BB of Fig. 5. It is sectional drawing.
第１図，第６図に示すように、タイヤの左側部１を作
るための金型である下金型２は、正方形の平板2a上面に
凹溝部３が環状に成形されている。この環状になった凹
溝部３の中心部は凸形に盛り上がった円形台状で、その
上面中心にはボス受穴４が設けられると共に、該ボス受
穴４から90度の間隔で放射状に４本のスポーク受溝５が
設けられている。さらに、この平板2a上面の外縁部には
溝６が凹溝部３に連なって設けられており、四隅にはプ
レス熱板７装着用のボルトがそれぞれ設けられている。As shown in FIGS. 1 and 6, a lower mold 2, which is a mold for making the left side portion 1 of the tire, has a concave groove 3 formed in an annular shape on the upper surface of a square flat plate 2a. The center of the annular groove 3 has a circular base with a convex shape, and a boss receiving hole 4 is provided at the center of the upper surface thereof. A spoke receiving groove 5 is provided. Further, a groove 6 is provided on the outer edge of the upper surface of the flat plate 2a so as to be continuous with the concave groove 3, and bolts for mounting the press hot plate 7 are provided at the four corners.
次に、第１図，第２図に示すように、中金型８は鍔付
円環状に形成され、中心側に断面略円形状をした環９、
該環９の外周に前記環９より大きい断面円形状をした環
10がそれぞれ形成されている。また、第１図，第３図に
示すように中金型８の大きさは、下金型2,上金型12の凹
溝部３の間に挟み込むことが出来、かつ、間隙25a,25b
ができるように、前記下金型２の凹溝部３の幅，深さよ
り小さい寸法で作られている。第１図に示すように、タ
イヤの右側部11を作るための金型である上金型12はプレ
ス熱板13に取り付けられる。この上金型12の形状はほぼ
下金型２と同形であるが、溝６は設けられていない。Next, as shown in FIGS. 1 and 2, the middle mold 8 is formed in a ring shape with a flange, and a ring 9 having a substantially circular cross section on the center side.
A ring having a circular cross section larger than the ring 9 on the outer periphery of the ring 9
10 are formed respectively. Also, as shown in FIGS. 1 and 3, the size of the middle mold 8 can be sandwiched between the concave grooves 3 of the lower mold 2 and the upper mold 12, and the gaps 25a, 25b
It is made smaller in size than the width and depth of the concave groove 3 of the lower die 2 so that As shown in FIG. 1, an upper mold 12, which is a mold for making the right side portion 11 of the tire, is attached to a hot press plate 13. The shape of the upper mold 12 is substantially the same as that of the lower mold 2, but the groove 6 is not provided.
次に、本発明に係る中空車輪の製造方法を説明する。 Next, a method for manufacturing a hollow wheel according to the present invention will be described.
第１図に示すように、プレス下部の熱板７にボルトに
より固定された下金型２の凹溝部３内に１枚の円環状の
圧延ゴム14を入れ、次に、この凹溝部３に入れた圧延ゴ
ム14上に中金型８を載せ、さらに、中金型８上にもう一
枚の圧延ゴム15を載せる。これらの圧延ゴム14,15は未
加硫（ゴム分子間が架橋されていない状態）で変形自在
の粘着性のものである。As shown in FIG. 1, one annular rolled rubber 14 is put into the groove 3 of the lower mold 2 fixed to the hot plate 7 at the lower part of the press with bolts. The middle mold 8 is placed on the loaded rubber 14, and another piece of the rubber 15 is placed on the middle mold 8. These rolled rubbers 14 and 15 are unvulcanized (a state in which rubber molecules are not cross-linked) and are deformable and sticky.
そして、下金型２を固定したプレス熱板７を上昇させ
る。そして、第３図に示すように、圧延ゴム14を下金型
２と中金型８の下部で構成される間隙25aに、圧延ゴム1
5を中金型８の上部と上金型12で構成される間隙25bに約
２分間程圧着させた後、プレス熱板７を下降させる。Then, the press hot plate 7 to which the lower mold 2 is fixed is raised. Then, as shown in FIG. 3, the rolled rubber 14 is inserted into the gap 25a formed by the lower die 2 and the lower portion of the middle die 8,
5 is pressed into the gap 25b formed by the upper portion of the middle die 8 and the upper die 12 for about 2 minutes, and then the press hot plate 7 is lowered.
この時、前述の圧延ゴム14,圧延ゴム15の外表面16部
分を加硫初期の状態とするために、前記下金型２と上金
型12は蒸気ヒーターにより摂氏温度140度〜160度に加熱
してあり、一方圧延ゴム14,15の中金型８に接する内表
面17部分を未加硫の状態とするために、中金型８は摂氏
温度80度〜90度に加熱してある。At this time, the lower mold 2 and the upper mold 12 are brought to a temperature of 140 to 160 degrees Celsius by a steam heater in order to bring the outer surface 16 of the rolled rubber 14 and the rolled rubber 15 into an initial state of vulcanization. The middle mold 8 is heated to a temperature of 80 to 90 degrees Celsius so that the inner surface 17 in contact with the middle mold 8 of the rolled rubbers 14 and 15 is in an unvulcanized state. .
以上の工程によりタイヤ左右側部それぞれの外表面16
が成形されると共に、第３図，第４図に示すように、タ
イヤ左右側部1,11の内側に中金型８の環９と環10により
円環状リム装着部18とタイヤ中空部19が成形される。以
上がタイヤの左右側部1,11の予備成型である。Through the above steps, the outer surface 16 of each of the left and right tires
As shown in FIGS. 3 and 4, the annular rim mounting portion 18 and the tire hollow portion 19 are formed inside the left and right side portions 1 and 11 of the tire by the rings 9 and 10 of the middle mold 8. Is molded. The above is the preliminary molding of the left and right side portions 1 and 11 of the tire.
次に、第４図に示すように、上金型12を離した後、中
金型８を取り除き、下金型２に設けられたボス受穴４と
スポーク受溝５に、接着材を塗布した金属製の円環状リ
ム20のボスとスポークを合わせながら、前記下金型２の
凹溝部３内に嵌まっているタイヤの左側部１の内側に成
型された円環状リム装着部18に、この円環状リム20を嵌
める。この円環状リム20の断面形状は円形であり、リム
外周面には該リム面をタイヤに固着させるためにリムの
半円の幅である未加硫の圧延ゴムシート21が被着されて
いる。また、下金型２に設けられている溝６には、パイ
プ22を着脱自在に装着する。この時、パイプ22の先端部
は下金形２の凹溝部３内に嵌まっているタイヤ中空部19
内に突出するようにする。Next, as shown in FIG. 4, after the upper mold 12 is released, the middle mold 8 is removed, and an adhesive is applied to the boss receiving holes 4 and the spoke receiving grooves 5 provided in the lower mold 2. While aligning the spokes of the metal annular rim 20 with the spokes, the annular rim mounting portion 18 molded inside the left side portion 1 of the tire fitted in the concave groove portion 3 of the lower mold 2, The annular rim 20 is fitted. The cross-sectional shape of the annular rim 20 is circular, and an unvulcanized rolled rubber sheet 21 having a semicircular width of the rim is adhered to the outer peripheral surface of the rim to fix the rim surface to the tire. . A pipe 22 is detachably mounted in the groove 6 provided in the lower mold 2. At this time, the tip of the pipe 22 is fitted into the hollow portion 19 of the tire which is fitted in the groove 3 of the lower mold 2.
So that it protrudes inward.
そして、タイヤの左側部の接合面23に合わせてタイヤ
の右側部の接合面24を載せて、再度プレス熱板７を上昇
させて下金型２と上金型12の型間に挟んで圧着し、下金
型2,上金型12を摂氏155度に約８分間程加硫を行う。こ
の時にパイプ22より6kg〜12kg/cm2の蒸気圧をタイヤ中
空部19に導入する。この工程によりタイヤは完全に加硫
され、タイヤの左右側部1,11の接合面23と接合面24及び
円環状リム20の外周に被着された圧延ゴムシート21は、
互いにしっかりと溶着されて円環状リム20と中空部26の
あるタイヤ部が一体となった中空車輪が製造される。Then, the bonding surface 24 on the right side of the tire is placed in accordance with the bonding surface 23 on the left side of the tire, and the press hot plate 7 is raised again so as to be sandwiched between the lower mold 2 and the upper mold 12 and pressed. Then, the lower mold 2 and the upper mold 12 are vulcanized at 155 degrees Celsius for about 8 minutes. At this time, a steam pressure of 6 kg to 12 kg / cm 2 is introduced from the pipe 22 into the tire hollow portion 19. By this step, the tire is completely vulcanized, and the rolled rubber sheet 21 adhered to the joint surfaces 23 and the joint surfaces 24 of the left and right side parts 1 and 11 and the outer periphery of the annular rim 20 are
A hollow wheel is manufactured which is welded firmly to one another and the tire portion having the annular rim 20 and the hollow portion 26 is integrated.
（発明の効果）本発明では、まず、下金型，中金型，上
金型の３枚の金型を使用して上述のようにタイヤの左右
側部を予備成型し、次いで、タイヤの上下成形型間にタ
イヤの左右側部と未加硫の圧延ゴムシートを被着した円
環状リムを装着し圧着成形し加硫するようにしたもので
ある。従って、タイヤ部の接合箇所が少なく接合不良等
のない中空車輪を製造できると共に、タイヤ部を作成す
るために多数の金形を必要としない中空車輪の製造方法
を提供することができるという優れた効果を有する。(Effects of the Invention) In the present invention, first, the left and right sides of the tire are preformed as described above using three dies, a lower die, a middle die, and an upper die. An annular rim on which an unvulcanized rolled rubber sheet is attached is mounted between the upper and lower molding dies, and an annular rim on which an unvulcanized rolled rubber sheet is attached is pressed and vulcanized. Accordingly, it is possible to manufacture a hollow wheel having a small number of joint portions of the tire portion and free from poor joints and the like, and to provide a method of manufacturing a hollow wheel which does not require a large number of molds to create a tire portion. Has an effect.
第１図は本発明に係る中空車輪を製造するための金型及
び圧延ゴムをプレス装置に配置した状態を示す斜視図、
第２図は第１図のＡ−Ａ断面図、第３図は下金型，中金
型，上金型間に圧延ゴムを挟んだ状態の縦断面図、第４
図は下金型内に予備成形されたタイヤ左側部と円環状リ
ムを示す斜視図、第５図は本発明に係る中空車輪の側面
図、第６図は第５図のＢ−Ｂ断面図、第７図は従来技術
において使用されている金型を示す斜視図、第８図は従
来技術により製造されたタイヤ正面図、第９図は従来技
術により製造されたタイヤ側面図、第10図は第９図のＣ
−Ｃ断面図である。 ２……下金型、３……凹溝部 ８……中金型、12……上金型 14……圧延ゴム、15……圧延ゴム 18……円環状リム装着部、19……タイヤ中空部 20……円環状リム、21……圧延ゴムシートFIG. 1 is a perspective view showing a state in which a mold and a rolled rubber for manufacturing a hollow wheel according to the present invention are arranged in a press device,
FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a longitudinal sectional view showing a state in which a rolled rubber is sandwiched between a lower mold, a middle mold, and an upper mold.
The figure is a perspective view showing a tire left side portion and an annular rim preformed in a lower mold, FIG. 5 is a side view of a hollow wheel according to the present invention, and FIG. 6 is a sectional view taken along line BB of FIG. , FIG. 7 is a perspective view showing a mold used in the prior art, FIG. 8 is a front view of a tire manufactured by the prior art, FIG. 9 is a side view of a tire manufactured by the prior art, FIG. Is C in FIG.
It is -C sectional drawing. 2 ... lower mold 3 ... concave groove 8 ... middle mold 12 ... upper mold 14 ... rolled rubber 15 ... rolled rubber 18 ... annular rim mounting part 19 ... hollow tire Part 20: annular rim, 21: rolled rubber sheet
フロントページの続き (56)参考文献 特開 昭63−260408（ＪＰ，Ａ) 特開 昭54−105185（ＪＰ，Ａ) 特開 昭63−199613（ＪＰ，Ａ) 特開 平２−145305（ＪＰ，Ａ) 特開 平２−114001（ＪＰ，Ａ) 特開 昭61−255816（ＪＰ，Ａ) 実開 昭59−35024（ＪＰ，Ｕ) 実公 昭25−4066（ＪＰ，Ｙ１)Continuation of the front page (56) References JP-A-63-260408 (JP, A) JP-A-54-105185 (JP, A) JP-A-63-199613 (JP, A) JP-A-2-145305 (JP) JP-A-2-114001 (JP, A) JP-A-61-255816 (JP, A) JP-A-59-35024 (JP, U) JP-A-25-4066 (JP, Y1)
Claims (1)
車輪の製造方法。 （イ）圧延ゴムを加硫初期状態とする温度に加熱した下
金型と上金型と、未加硫状態とする温度に加熱した中金
型の３つの金型間で加熱圧着することによりタイヤの左
右側部を成形する工程、 （ロ）中金型を上金型、下金型間より取り外す工程、 （ハ）圧延ゴムを外周に張付けた円環状リムをタイヤ左
右側部間に装着し、前記タイヤ左右側部を一体と成るよ
うに組み合わせる工程、 （ニ）組み合わされタイヤ左右側部と円環状リムを下金
型及び上金型間で圧着する工程、 （ホ）左右側部の中空部に蒸気を導入しながら、左右側
部を下金型及び上金型により加硫する工程。1. A method of manufacturing a hollow wheel, comprising the following steps. (A) By pressing under pressure between three molds, a lower mold and an upper mold heated to a temperature at which a vulcanized rubber is in an initial vulcanization state, and a middle mold heated to a temperature at which an unvulcanized state is obtained. (B) removing the middle mold from the upper mold and lower mold, and (c) attaching an annular rim with rolled rubber stuck to the outer periphery between the left and right tires. (D) a step of combining the left and right side portions of the tire so as to be integrated; (d) a step of crimping the combined left and right side portions of the tire and the annular rim between a lower mold and an upper mold; A step of vulcanizing the left and right sides with a lower mold and an upper mold while introducing steam into the hollow portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1012091A JP2811001B2 (en) | 1989-01-20 | 1989-01-20 | Manufacturing method of hollow wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1012091A JP2811001B2 (en) | 1989-01-20 | 1989-01-20 | Manufacturing method of hollow wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02192916A JPH02192916A (en) | 1990-07-30 |
| JP2811001B2 true JP2811001B2 (en) | 1998-10-15 |
Family
ID=11795901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1012091A Expired - Fee Related JP2811001B2 (en) | 1989-01-20 | 1989-01-20 | Manufacturing method of hollow wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2811001B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07118988B2 (en) * | 1989-03-13 | 1995-12-20 | 井関農機株式会社 | Wheel manufacturing equipment |
-
1989
- 1989-01-20 JP JP1012091A patent/JP2811001B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02192916A (en) | 1990-07-30 |
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