JPS635933A - Manufacture of tire flap and production apparatus thereof - Google Patents
Manufacture of tire flap and production apparatus thereofInfo
- Publication number
- JPS635933A JPS635933A JP61151102A JP15110286A JPS635933A JP S635933 A JPS635933 A JP S635933A JP 61151102 A JP61151102 A JP 61151102A JP 15110286 A JP15110286 A JP 15110286A JP S635933 A JPS635933 A JP S635933A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- flap
- tire
- injection
- passage
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 229920001971 elastomer Polymers 0.000 claims abstract description 38
- 239000005060 rubber Substances 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 238000001746 injection moulding Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 15
- 238000004073 vulcanization Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Landscapes
- Tires In General (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）
本発明はタイヤとチューブとリムとの間に画成された空
間に装填されるタイヤ用フラップの製造方法および製造
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for manufacturing a tire flap that is loaded into a space defined between a tire, a tube, and a rim.
（従来の技術）
タイヤ用フラップは第３図に符号５で示すように、タイ
ヤ１と、チューブ２と、リム３との間に画成される空間
に装填されて、車両走行時のチューブの局部的な変形、
タイヤとの摩擦による損傷等を防止する目的で用いられ
、主としてトラックやバス等のタイヤに用いられる。フ
ラップ５は第４図に示すように、ベース部５ａ、ウィン
グ部５ｂ、パルプロ部５ｃから構成される。このような
フラップ５は、その寸法、形状、材料特性等が適切でな
いと、装着作業性を悪化させたり、走行時のパルプロの
吹き破れ、ウィング部５ｂ根元部のクランク、フラップ
落ち等によりついにはチューブ２をパンクさせたりする
。特に最近は、急速なラジアルタイヤの普及により高速
走行条件での使用が高まるにつれ、ウィング部５ｂの先
端部が第５図（ａ）に示すように途中で途切れて角部が
あるとチューブ２を傷つけ易くやがてはパンクに結びつ
くという問題が生じている。したがって、ウィング部５
ｂの先端部は第５図（ｂ）に示すように鋭利な形状のも
のほどフラップ５として商品価値が高いといえる。(Prior Art) A tire flap is loaded into a space defined between a tire 1, a tube 2, and a rim 3, as shown by reference numeral 5 in FIG. local deformation,
It is used for the purpose of preventing damage caused by friction with tires, and is mainly used for tires such as trucks and buses. As shown in FIG. 4, the flap 5 is composed of a base part 5a, a wing part 5b, and a pulp part 5c. If the size, shape, material properties, etc. of such flaps 5 are not appropriate, installation workability may deteriorate, and the pulp roller may be blown off during driving, the wing section 5b may be cranked, the flap may fall off, etc. Or puncture tube 2. Particularly recently, as radial tires have rapidly become popular and are increasingly used under high-speed driving conditions, if the tip of the wing portion 5b is cut off midway and has a corner as shown in FIG. 5(a), the tube 2 may be A problem has arisen in that they are easily damaged and eventually lead to punctures. Therefore, the wing portion 5
As shown in FIG. 5(b), it can be said that the sharper the tip of the flap 5, the higher the commercial value of the flap 5.
ところで、このようなタイヤ用フラップの製造方法とし
ては従来、次のようなものがある。By the way, conventional methods for manufacturing such tire flaps include the following.
一つは、オープンロールもしくは密閉式混練装置を用い
て混練りされた練ゴムを、オープンロールもしくは押出
機を用いて熱入れし、フラップの断面形状に押出された
その練ゴムの生地を所定寸法に裁断する。その練ゴム生
地を、第６図に符号９で示すように、製品フラップの内
周面の形状と同型の外周面を有する型部材８の周囲に巻
付け、さらに練ゴム生地の外周面に幅１５０ｍｍ程度の
布１０を巻付けて生地全部を被覆した後、布がはずれな
いようひも（図示せず）を巻付けて結ぶ。この状態で図
外の加硫缶内に密封収納して加硫硬化させた後、ひもや
布１０を剥がしたり型部材８を分解して製品フラップを
取出すという方法である。One is to heat the kneaded rubber using an open roll or closed kneading device and heat it using an open roll or extruder, and extrude the kneaded rubber dough into the cross-sectional shape of the flap to a predetermined size. Cut into pieces. The kneaded rubber dough is wrapped around a mold member 8 having an outer peripheral surface of the same shape as the inner peripheral surface of the product flap, as shown by reference numeral 9 in FIG. After wrapping a cloth 10 of about 150 mm to cover the entire cloth, a string (not shown) is wrapped and tied to prevent the cloth from coming off. In this state, the product is sealed and stored in a vulcanizing can (not shown) and cured by vulcanization, and then the string or cloth 10 is peeled off or the mold member 8 is disassembled to take out the product flap.
他の方法は、上記方法と同様にして混練り、熱入れされ
た練ゴムを、円形や長円形の断面形状に押出してその練
ゴムの生地を所定寸法に裁断する。Another method is to extrude kneaded rubber that has been kneaded and heated in the same manner as the above method into a circular or oval cross-sectional shape, and then cut the dough of the kneaded rubber into predetermined dimensions.
その練ゴムの生地を常温もしくは予熱後、第７図（ａ）
に符号１２で示すように、２つのプレス下型１３および
それぞれのプレス中型１４と２つのプレス上型１５との
間に型の円周方向に沿って配置し、次の釜入れをしてプ
レスにより圧縮成型することにより第７図（ｂ）に示す
ように、練ゴム生地１２はプレス型１３と１４と１５と
の間に画成された製品フラップと同型の型空間内で展延
されて充填され、加硫後にプレス型１３．１４．１５を
開いて製品フラップを取出すという方法である。After heating the kneaded rubber dough to room temperature or preheating, Fig. 7 (a)
As shown by reference numeral 12, the two lower press molds 13, the respective middle press molds 14, and the two upper press molds 15 are arranged along the circumferential direction of the molds, and the next kettle is loaded and the press is started. As shown in FIG. 7(b), the kneaded rubber dough 12 is spread in a mold space of the same type as the product flap defined between press molds 13, 14 and 15. After filling and vulcanization, the press mold 13, 14, 15 is opened and the product flap is taken out.
（発明が解決しようとする問題点）
しかしながら、このような従来のタイヤ用フラップの製
造方法にあっては、製造工程が多工程にわたり煩雑であ
るだけでなく、前記従来の−の方法においては全ての作
業を人手に鮪っていて生産効率、人件費、安全性等にお
いて問題となっており、前記従来の他の方法においては
製品形状、寸法等においてその品質が不安定であるとい
う問題点がある。すなわち、前記従来の他の方法におけ
る圧縮成型法においては、練ゴム生地１２の断面は製品
フラップと全く異なる形状を有しており、型を上下方向
に圧縮させることにより型空間内で展延して充填させて
いくため、内部に気泡溜りや部分的なゴム不足が生じな
いよう、プレス下型１３とプレス上型１５との間の合わ
せ面にわずかな隙間を設けて練ゴム生地１２を少しはみ
出させるようにしている。このため、そのはみ出し部を
切断することにより、製品フラップのウィング部の先端
部には第５図（ａ）に示すように角部ができ、第５図（
ｂ）に示すように鋭利な形状にすることができない。こ
のようなウィング部の先端部を鋭利にするために射出成
型装置を用いようとしても、フラップ加硫時に射出ノズ
ルと型空間とを連通ずる通路内のゴム材料も加硫硬化し
てスクラップ化してしまうため、ゴム材料に莫大な無駄
が生してその実用化を阻んでいる。(Problems to be Solved by the Invention) However, in such a conventional method for manufacturing tire flaps, not only is the manufacturing process multi-step and complicated, but in the conventional method (-), all This work is done manually, which poses problems in terms of production efficiency, labor costs, safety, etc., and in the other conventional methods mentioned above, there is a problem that the quality of the product is unstable in terms of shape, size, etc. be. That is, in the other conventional compression molding method, the cross section of the kneaded rubber dough 12 has a shape completely different from that of the product flap, and it is expanded in the mold space by compressing the mold in the vertical direction. Since the rubber dough 12 is filled with a small gap between the mating surfaces of the lower press mold 13 and the upper press mold 15, a small amount of the kneaded rubber dough 12 is placed in order to prevent air bubbles from accumulating or rubber shortages occurring inside. I try to make it stick out. Therefore, by cutting off the protruding part, a corner is formed at the tip of the wing part of the product flap as shown in FIG.
As shown in b), it cannot be made into a sharp shape. Even if an injection molding device is used to sharpen the tips of such wing parts, the rubber material in the passage that communicates the injection nozzle with the mold space will also be vulcanized and hardened during flap vulcanization and become scrap. As a result, a huge amount of rubber material is wasted, which hinders its practical application.
（問題点を解決するための手段）
そこで本発明は前記問題点を解決するため、タイヤ用フ
ラップの製造方法としてタイヤとチューブとリムとの間
に画成された空間に装填されるフラップを射出成形装置
を用いて製造することを特徴とし、その製造方法の実施
に直接使用するタイヤ用フラップの製造装置として、前
記射出成形装置が、流動性を有する未加硫ゴム材料を射
出する射出口を有する射出ノズルと、前記フラップと同
型の型空間を画成する加硫金型ブロックと、前記射出口
と型空間とを連通ずる２本以上の通路の大部分が形成さ
れこの通路内の未加硫ゴム材料の加硫を防止する未加硫
金型ブロックと、を備えた構成としたものである。(Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the present invention provides a method for manufacturing a tire flap by injecting a flap that is loaded into a space defined between a tire, a tube, and a rim. The tire flap manufacturing apparatus is characterized in that the tire flap is manufactured using a molding apparatus, and is used directly in carrying out the manufacturing method, wherein the injection molding apparatus has an injection port for injecting an unvulcanized rubber material having fluidity. a vulcanization mold block defining a mold space of the same type as the flap, and most of two or more passages communicating with the injection port and the mold space, and an uncured part in the passages. The present invention includes an unvulcanized mold block for preventing vulcanization of the sulfurized rubber material.
（作用）
このような構成のタイヤ用フラップの製造方法および製
造装置によれば、タイヤとチューブとリムドの間に画成
された空間に装填されるフラップを射出成形装置を用い
て製造するため、製造工程が大幅に簡略化さ・れ、人手
もあまり必要とせず、製品形状、寸法等においてその品
質が安定化する。(Function) According to the method and apparatus for manufacturing a tire flap having such a configuration, the flap to be loaded into the space defined between the tire, the tube, and the rim is manufactured using an injection molding device. The manufacturing process is greatly simplified, less manpower is required, and the quality of the product is stabilized in terms of shape, dimensions, etc.
特に、従来の圧縮成形法のように上型と下型との間の合
わせ面に隙間を設けなくとも、未加硫ゴム材料の流動性
により内部に気泡溜りやゴム不足を生ずることなく型空
間の隅々までゴム材料が充填されるため、製品形状や寸
法等において品質が安定するだけでなくウィング部の先
端部を確実に第５図（ｂ）に示すよう鋭利な形状にする
ことができる。In particular, even without creating a gap between the mating surfaces between the upper and lower molds as in conventional compression molding methods, the fluidity of the unvulcanized rubber material eliminates the mold space without causing air bubbles or rubber shortages inside. Since every corner of the rubber material is filled with the rubber material, not only is the quality stable in terms of product shape and dimensions, but also the tip of the wing part can be reliably shaped into a sharp shape as shown in Figure 5 (b). .
また、射出ノズルの射出口と型空間を連通ずる通路の大
部分は未加硫金型ブロック内に形成されてその通路内の
ゴム材料の加硫が防止されて次のフラップ用に使うこと
ができるため、タイヤ用フラップを射出成形装置で製造
することを阻む要因となっていた材料の大幅な無駄を防
止することができる。Additionally, most of the passageway that communicates the injection nozzle's injection port with the mold space is formed within the unvulcanized mold block, preventing the rubber material in the passageway from being vulcanized and allowing it to be used for the next flap. This makes it possible to prevent a large amount of material from being wasted, which has been a barrier to manufacturing tire flaps using injection molding equipment.
（実施例） 以下本発明の実施例について図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図は本発明によるタイヤ用フラップの製造方法の実
施に使用する製造装置の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of a manufacturing apparatus used to carry out the method for manufacturing a tire flap according to the present invention.
第１図において、２０はタイヤ用フラップの製造装置と
しての射出成形装置であり、２１はその射出ノズルであ
ってその射出ノズル２１の先端部（下端部）には射出口
２１ａが形成されている。射出ノズル２１の側部周囲に
は第１上型２３が配置されており、この第１上型２３の
下方には第１中型２４が配置され、さらに第１中型２４
の下方には第１下型２５が配置されて、これらの型２３
．２４．２５が右手図に示すように閉じるとそれらの間
に製品フラップと同型の型空間２７が画成される。これ
らの型２３．２４．２５の下方にも同型の型空間３５を
画成する第２上型３１、第２中型３２、第２下型３３が
上から順次配置されている。左半図のように型が開いて
いるときは、第１中型２４は第１吊りシャフト３７に、
第１下型２５および第２上型３１は第２吊りシャフト３
８に吊られて支持され、第２巾型３２はエジェクタ４０
に上昇可能に支持されている。第１上型２３、第１中型
２４、第１下型２５．第２上型３１、第２巾型３２、第
２下型３３にはそれぞれ、高温度体を通して型温度を上
昇させるためのジャケット２３ａ 、 ２４ａ 、２５
ａ 、 ３１ａ 、 ３２ａ、３３ａが内部に形成され
ている。第１上型２３、第１中型２４、第１下型２５は
加硫金型ブロック４２を、第２上型３１、第２中型３２
、第２下型３３は加硫金型ブロック４３を構成している
。第１下型２５と第２上型３１との間には断熱板４５．
４６を介して未加硫金型ブロック４８が一体的に介装さ
れており、この未加硫金型４８内には射出ノズル２１の
射出口２１ａと型空間２７および３５とを連通ずる通路
の大部分を占める第１通路５０が形成されている。第１
通路５０は射出口２１ａから下方に行くと図中左右２方
向に分岐し、その左右２方向の終端部でさらに上下２方
向に分岐した副ノズル５０ａおよび５０ｂはそれぞれ型
空間２７および３５に向かっている。副ノズル５０ａ、
５０ｂの先端はその開口面積を小さく絞られており、こ
の副ノズル５０ａ、５０ｂの先端部と型空間２７．３５
との間にはそれぞれ第２通路５２．５３が形成されてい
る。第１通路５０が未加硫金型ブロック４８内に形成さ
れているのに対し、第２通路５２．５３は加硫金型ブロ
ック４２．４３内に形成されている。第２通路５２、５
３は型空間２７．３５の直前でその断面積を小さく絞ら
れているとともに、第２図に示すように扇状に形成され
てその弧状部に７ケ所のボート５２ａ、５３ａが設けら
れている。In FIG. 1, 20 is an injection molding device as a tire flap manufacturing device, and 21 is an injection nozzle thereof, and an injection port 21a is formed at the tip (lower end) of the injection nozzle 21. . A first upper mold 23 is arranged around the side of the injection nozzle 21 , a first middle mold 24 is arranged below the first upper mold 23 , and a first middle mold 24 is arranged below the first upper mold 23 .
A first lower mold 25 is arranged below the mold 23.
．． When 24 and 25 are closed as shown in the right hand figure, a mold space 27 of the same type as the product flap is defined between them. Below these molds 23, 24, and 25, a second upper mold 31, a second middle mold 32, and a second lower mold 33 defining a mold space 35 of the same type are sequentially arranged from above. When the mold is open as shown in the left half diagram, the first middle mold 24 is attached to the first hanging shaft 37,
The first lower mold 25 and the second upper mold 31 are connected to the second hanging shaft 3
The second width mold 32 is suspended and supported by the ejector 40.
It is supported so that it can rise to . First upper mold 23, first middle mold 24, first lower mold 25. The second upper mold 31, the second width mold 32, and the second lower mold 33 are provided with jackets 23a, 24a, and 25, respectively, for raising the mold temperature through a high-temperature body.
a, 31a, 32a, and 33a are formed inside. The first upper mold 23, the first middle mold 24, and the first lower mold 25 hold the vulcanization mold block 42, the second upper mold 31, and the second middle mold 32.
, the second lower mold 33 constitutes a vulcanization mold block 43. A heat insulating plate 45 is provided between the first lower mold 25 and the second upper mold 31.
An unvulcanized mold block 48 is integrally interposed via a hole 46, and a passageway communicating between the injection port 21a of the injection nozzle 21 and the mold spaces 27 and 35 is provided in the unvulcanized mold 48. A first passage 50 that occupies most of the area is formed. 1st
When the passage 50 goes downward from the injection port 21a, it branches into two directions, left and right in the figure, and at the end of the two directions, sub nozzles 50a and 50b further branch into two directions, up and down, toward the mold spaces 27 and 35, respectively. There is. sub nozzle 50a,
The opening area of the tip of the sub nozzle 50b is narrowed to a small size, and the tip of the sub nozzle 50a, 50b and the mold space 27.35
Second passages 52 and 53 are respectively formed between them. The first passage 50 is formed in the unvulcanized mold block 48, whereas the second passage 52.53 is formed in the vulcanized mold block 42.43. Second passage 52, 5
3 has a narrow cross-sectional area just before the mold space 27.35, and is formed into a fan shape as shown in FIG. 2, with seven boats 52a, 53a provided in the arc shape.
射出ノズル２１の周囲内部には温調ジャケット５５が形
成されており、この温調ジャケット５５には図外の温調
装置で所定温度に温調された水、油、エチレングリコー
ル等の媒体が温調パイプ５６を通って充填され、射出ノ
ズル２１の油孔を通る未加硫ゴムの加硫硬化を防止して
その流動性を維持できるようになっている。未加硫金型
ブロック４８内にも温調ジャケット５８が形成され、こ
の温調ジャケット５８にも温調ジャケット５５と同様に
図外の温調パイプを通って温調された媒体が充填される
ようになっている。A temperature control jacket 55 is formed around the injection nozzle 21, and a medium such as water, oil, ethylene glycol, etc. whose temperature is controlled to a predetermined temperature by a temperature control device (not shown) is placed in this temperature control jacket 55. The unvulcanized rubber is filled through the regulating pipe 56 and is prevented from curing and hardening of the unvulcanized rubber passing through the oil hole of the injection nozzle 21, thereby maintaining its fluidity. A temperature control jacket 58 is also formed inside the unvulcanized mold block 48, and like the temperature control jacket 55, this temperature control jacket 58 is also filled with a temperature controlled medium through a temperature control pipe (not shown). It looks like this.
次にタイヤ用フラップの製造方法について説明する。ま
ず射出成形装置２０の型を第１図右手図に示すように閉
じた状態にしておいて、射出ノズル２１の射出口２１ａ
から流動性を有する未加硫ゴムを第１通路５０内に射出
する。この未加硫ゴムは第１通路５０を通って副ノズル
５０ａ、５０ｂに流通され、この副ノズル５０ａ、５０
ｂの先端部で絞られて第２通路５２．５３内に射出され
るときに発熱して流動性を増し、さらに第２通路５２．
５３から型空間２７．３５に射出される直前でも絞られ
てやはり発熱し、流動性を増して型空間２７．３５内に
隅々まで隙間なく充填される。次に加硫金型ブロック４
２のジャケット２３ａ 、２４ａ 、２５ａ、および加
硫金型ブロック４３のジャケット３１ａ、３２ａ、３３
ａに高温流体を供給して加硫金型ブロック４２．４３の
温度を上昇させることにより、型空間２７．３５内の未
加硫ゴムを加硫硬化せしめて製品フラップが出来る。こ
のとき、射出ノズル２１の温調ジャケット５５および未
加硫金型ブロック４８の温調ジャケット５８内に図外の
温調装置で所定温度に温調された水、油、エチレングリ
コール等の媒体が供給されて射出ノズル２１および未加
硫金型ブロック４８が温調され、加硫金型ブロック４２
．４３の加硫によって未加硫金型ブロック４８や射出ノ
ズル２１が加熱されることを防止し、このことにより射
出ノズル２１内や第１通路５０（副）ズル５Ｑａ、５０
ｂを含む）内の未加硫ゴムが加硫されて流動性が失われ
ることを防止する。次に第１図左半図に示すように射出
成形装置２０の型を上下に開いて硬化した製品としての
タイヤ用フラップを取出す。そして再び型を閉じて次の
射出成形に備える。このように、タイヤ用フラップを射
出成形装置２０を用いて製造することにより、精練工程
で混練りされた練ゴムが直接使用可能となって、従来の
ように熱入れ、押出し、裁断、予熱、生地の金型への供
給、布の巻付は等の人手による工程が不要となって略自
動化され、製造工程が大幅に簡略化される。このため、
生産能率が大幅に上昇して従来製法の約２倍になった。Next, a method for manufacturing a tire flap will be described. First, the mold of the injection molding device 20 is closed as shown in the right-hand diagram of FIG.
Fluid unvulcanized rubber is injected into the first passage 50 from the injector. This unvulcanized rubber passes through the first passage 50 and is distributed to the sub nozzles 50a, 50b.
When the fluid is squeezed at the tip of the second passage 52.b and injected into the second passage 52.53, it generates heat and increases fluidity.
Immediately before being injected into the mold space 27.35 from 53, the fluid is squeezed and generates heat as well, increasing fluidity and filling every corner of the mold space 27.35 without any gaps. Next, vulcanization mold block 4
2 jackets 23a, 24a, 25a, and jackets 31a, 32a, 33 of vulcanization mold block 43.
By supplying high-temperature fluid to a to raise the temperature of the vulcanization mold block 42.43, the unvulcanized rubber in the mold space 27.35 is vulcanized and hardened to form a product flap. At this time, a medium such as water, oil, ethylene glycol, etc. whose temperature is controlled to a predetermined temperature by a temperature control device (not shown) is inside the temperature control jacket 55 of the injection nozzle 21 and the temperature control jacket 58 of the unvulcanized mold block 48. The injection nozzle 21 and the unvulcanized mold block 48 are temperature-controlled, and the vulcanized mold block 42
．． 43 prevents the unvulcanized mold block 48 and the injection nozzle 21 from being heated, thereby preventing the inside of the injection nozzle 21 and the first passage 50 (sub) nozzle 5Qa, 50 from being heated.
This prevents the unvulcanized rubber in (including b) from being vulcanized and losing fluidity. Next, as shown in the left half of FIG. 1, the mold of the injection molding device 20 is opened up and down to take out the hardened tire flap. The mold is then closed again to prepare for the next injection molding. In this way, by manufacturing tire flaps using the injection molding apparatus 20, the kneaded rubber kneaded in the scouring process can be used directly, and can be heated, extruded, cut, preheated, and Manual processes such as feeding the fabric to the mold and wrapping the fabric are no longer necessary and are substantially automated, greatly simplifying the manufacturing process. For this reason,
Production efficiency has increased significantly and is approximately twice that of conventional manufacturing methods.
また、射出成形装置２０の型空間２７．３５内に未加硫
ゴムがその流動性により隅々まで隙間なく充填されるた
め、製品フラップのウィング部の先端部は第５図（ｂ）
に示すように鋭利な形状となり、形状や寸法等において
品質が安定化して商品価値の高いフラップを生産するこ
とが可能となる。さらに、射出ノズル２１の射出口２１
ａと型空間２７．３５を連通する通路の大部分を占める
第１通路５０は未加硫金型ブロック４８内に形成されて
いるためにその通路５０内のゴム材料の加硫が防止され
、次のフラップ用の材料として使うことが可能となって
歩止りが改善されて材料の大幅な無駄を防止することが
できる。In addition, because the unvulcanized rubber is filled in the mold space 27.35 of the injection molding device 20 without any gaps due to its fluidity, the tip of the wing part of the product flap is as shown in FIG. 5(b).
As shown in the figure, the flap has a sharp shape, and the quality is stabilized in terms of shape and dimensions, making it possible to produce flaps with high commercial value. Furthermore, the injection port 21 of the injection nozzle 21
Since the first passage 50, which occupies most of the passage communicating between the mold space 27.35 and the mold space 27.35, is formed in the unvulcanized mold block 48, the rubber material in the passage 50 is prevented from being vulcanized. It becomes possible to use the material for the next flap, improving yields and preventing significant wastage of material.
なお、上記実施例においては射出成形装置２０の型が上
下に開くものについて説明したが、左右水平方向に開く
ものであってもよい。また、第１通路５０は途中で図中
水平方向に２本に分かれるものについて説明したが、３
本以上に分岐するものであってもよい。さらに、加硫金
型ブロックは上下に４２と４３が２組あるものについて
説明したが、１組であってもよい。In the above embodiment, the mold of the injection molding apparatus 20 is opened vertically, but it may be opened horizontally. In addition, although the first passage 50 has been described as being divided into two in the horizontal direction in the figure, there are three.
It may be something that branches out more than a book. Furthermore, although the vulcanization mold block has been described as having two sets of 42 and 43 on the upper and lower sides, it is also possible to have one set.
第１．２図は本発明によるタイヤ用フラップの製造方法
の実施に直接使用するタイヤ用フラップの製造装置の一
実施例を示す図であり、第１図左半図はその型が開いた
状態を示す半断面図、同図右手図はその型が閉じた状態
を示す半断面図、第２図は第１図における第２通路５２
．５３の■矢視図、第３図はフラップを装填したタイヤ
の断面図、第４図はフラップの部分斜視図、第５図はフ
ラップを装填したタイヤの部分拡大断面図、特に同図（
ａ）は不適切な形状のフラップを装填したタイヤの断面
図、同図（ｂ）は適切な形状のフラップを装填したタイ
ヤの断面図、第６図は従来のタイヤ用フラップの製造方
法の一つに用いられるフラップ型の断面図、第７図は従
来のタイヤ用フラ・ノブの製造方法の他のものに用いら
れる圧縮成型プレスの半丁面図であり、特に同図（ａ）
は練ゴム生地を装填する状態を示す図、同図（ｂ）は練
ゴム生地をプレスで圧縮成形して型空間に充填させた状
態を示す図である。
２０・・・・・・射出成形装置、
２１・・・・・・射出ノズル、
２１ａ・・・・・・射出口、
２３・・・・・・第１上型、
２４・・・・・・第１中型、
２５・・・・・・第１下型、
３１・・・・・・第２上型、
３２・・・・・・第２中型、
３３・・・・・・第２下型、
２３ａ 、２４ａ 、２５ａ 、３１ａ 、３２ａ 、
３３ａ・・・・・・ジャケット、
２７．３５・・・・・・型空間、
３７・・・・・・第１吊りシャフト、
３８・・・・・・第２吊りシャフト、
４０・・・・・・エジェクタ、
４２．４３・・・・・・加硫金型ブロック、４５．４６
・・・・・・断熱板、
４８・・・・・・未加硫金型ブロック、５０・・・・・
・第１通路、
５０ａ、５０ｂ・・・・・・副ノズル、５２．５３・・
・・・・第２通路、
５２ａ、５３ａ・・・・・・ボート、
５５．５８・・・・・・温調ジャケット、５６・・・・
・・温調パイプ。Figure 1.2 is a diagram showing an embodiment of a tire flap manufacturing apparatus that is used directly in carrying out the tire flap manufacturing method according to the present invention, and the left half of Figure 1 is a state in which the mold is open. The right-hand figure in the figure is a half-sectional view showing the mold in a closed state, and Figure 2 is the second passage 52 in Figure 1.
．． 53 is a cross-sectional view of the tire loaded with a flap, FIG. 4 is a partial perspective view of the flap, and FIG. 5 is a partial enlarged cross-sectional view of the tire loaded with a flap, especially the same figure (
a) is a cross-sectional view of a tire loaded with a flap of an inappropriate shape, (b) is a cross-sectional view of a tire loaded with a flap of an appropriate shape, and Figure 6 is a diagram of a conventional tire flap manufacturing method. FIG. 7 is a half-section view of a compression molding press used in another method for manufacturing tire flap knobs, particularly in FIG. 7(a).
1 is a diagram showing a state in which the kneaded rubber dough is loaded, and FIG. 3(b) is a diagram showing a state in which the kneaded rubber dough is compression-molded with a press and filled into the mold space. 20...Injection molding device, 21...Injection nozzle, 21a...Injection port, 23...First upper mold, 24... 1st middle mold, 25...1st lower mold, 31...2nd upper mold, 32...2nd middle mold, 33...2nd lower mold , 23a, 24a, 25a, 31a, 32a,
33a...Jacket, 27.35...Mold space, 37...First hanging shaft, 38...Second hanging shaft, 40... ...Ejector, 42.43... Vulcanization mold block, 45.46
...Insulation board, 48...Unvulcanized mold block, 50...
・First passage, 50a, 50b... Sub-nozzle, 52.53...
...Second passage, 52a, 53a...Boat, 55.58...Temperature control jacket, 56...
・Temperature control pipe.
Claims (2)
に装填されるフラップを射出成形装置を用いて製造する
ことを特徴とするタイヤ用フラップの製造方法。(1) A method for manufacturing a tire flap, which comprises manufacturing a flap to be loaded into a space defined between a tire, a tube, and a rim using an injection molding device.
に装填されるフラップを製造する射出成形装置が、流動
性を有する未加硫ゴム材料を射出する射出口を有する射
出ノズルと、前記フラップと同型の型空間を画成する加
硫金型ブロックと、前記射出口と型空間とを連通する２
本以上の通路の大部分が形成されこの通路内の未加硫ゴ
ム材料の加硫を防止する未加硫金型ブロックと、を備え
たことを特徴とするタイヤ用フラップの製造装置。(2) An injection molding device that manufactures a flap that is loaded into a space defined between a tire, a tube, and a rim has an injection nozzle that injects a fluid unvulcanized rubber material; a vulcanization mold block that defines a mold space of the same type as the flap, and a vulcanization mold block that communicates the injection port and the mold space;
1. An apparatus for manufacturing a tire flap, comprising: an unvulcanized mold block in which most of the passages having a length of more than 100 mm are formed and the unvulcanized rubber material in the passages is prevented from being vulcanized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61151102A JPH0745149B2 (en) | 1986-06-26 | 1986-06-26 | Tire flap manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61151102A JPH0745149B2 (en) | 1986-06-26 | 1986-06-26 | Tire flap manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS635933A true JPS635933A (en) | 1988-01-11 |
| JPH0745149B2 JPH0745149B2 (en) | 1995-05-17 |
Family
ID=15511385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61151102A Expired - Lifetime JPH0745149B2 (en) | 1986-06-26 | 1986-06-26 | Tire flap manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745149B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114964A1 (en) * | 2011-02-21 | 2012-08-30 | 株式会社ブリヂストン | Flap for tube tire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49104447U (en) * | 1972-12-28 | 1974-09-06 | ||
| JPS52105983A (en) * | 1976-03-02 | 1977-09-06 | Pirelli | Method of making tread of automobile tire by injection molding |
| JPS5775842A (en) * | 1980-10-31 | 1982-05-12 | Yokohama Rubber Co Ltd:The | Manufacture of tire flap for automobile |
| JPS60127113A (en) * | 1983-12-14 | 1985-07-06 | Sumitomo Rubber Ind Ltd | Molding equipment of endless rubber band |
-
1986
- 1986-06-26 JP JP61151102A patent/JPH0745149B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49104447U (en) * | 1972-12-28 | 1974-09-06 | ||
| JPS52105983A (en) * | 1976-03-02 | 1977-09-06 | Pirelli | Method of making tread of automobile tire by injection molding |
| JPS5775842A (en) * | 1980-10-31 | 1982-05-12 | Yokohama Rubber Co Ltd:The | Manufacture of tire flap for automobile |
| JPS60127113A (en) * | 1983-12-14 | 1985-07-06 | Sumitomo Rubber Ind Ltd | Molding equipment of endless rubber band |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114964A1 (en) * | 2011-02-21 | 2012-08-30 | 株式会社ブリヂストン | Flap for tube tire |
| CN103380010A (en) * | 2011-02-21 | 2013-10-30 | 株式会社普利司通 | Flap for tube tire |
| JP6078462B2 (en) * | 2011-02-21 | 2017-02-08 | 株式会社ブリヂストン | Flap for tube tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745149B2 (en) | 1995-05-17 |
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