JPS61230921A - Plastic bending process and its device - Google Patents
Plastic bending process and its deviceInfo
- Publication number
- JPS61230921A JPS61230921A JP60073205A JP7320585A JPS61230921A JP S61230921 A JPS61230921 A JP S61230921A JP 60073205 A JP60073205 A JP 60073205A JP 7320585 A JP7320585 A JP 7320585A JP S61230921 A JPS61230921 A JP S61230921A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- forming roll
- main
- molding roll
- rolls
- 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
- 238000005452 bending Methods 0.000 title claims description 12
- 239000004033 plastic Substances 0.000 title claims description 10
- 229920003023 plastic Polymers 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 29
- 239000000047 product Substances 0.000 abstract description 18
- 239000000057 synthetic resin Substances 0.000 abstract description 8
- 229920003002 synthetic resin Polymers 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 239000013067 intermediate product Substances 0.000 abstract description 2
- 239000000088 plastic resin Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000003672 processing method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/131—Curved articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/26—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on a rotating drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/224—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length having a profiled section, e.g. tubes, rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/04—Bending or folding of plates or sheets
- B29C53/043—Bending or folding of plates or sheets using rolls or endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、熱可塑性合成樹脂を原料とし、自転車、小児
用車等の泥除けや、その他任意湾曲形状を有するプラス
チックの曲げ加工方法とその装置に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method and apparatus for bending plastics made from thermoplastic synthetic resin and having any arbitrary curved shape, such as mudguards for bicycles, children's cars, etc. Regarding.
従来、例えば自転車、小児用車等の泥除けを形成するに
は金属薄板を、概ね完成品に見合う広さに予めプレスに
よって打抜き、これを複数段の成型ロールによって絞り
成形したり、或は、成型ロールによらず上記打抜いた金
属板を別のプレスによって絞り金型で、その変形度(絞
りの深さや、曲げの程度)に応じて数段階に分けて徐々
に完成品の形に近付けて行く加工方法が取られていた。Conventionally, in order to form mudguards for bicycles, children's cars, etc., a thin metal plate was previously punched out using a press to a size roughly commensurate with the finished product, and then this was drawn and formed using multiple forming rolls. Regardless of the roll, the punched metal plate is used in a drawing die using another press, and is divided into several stages depending on the degree of deformation (depth of drawing, degree of bending), and is gradually brought closer to the shape of the finished product. A processing method was used.
そして、仕上げとして別布研磨をしたり或はメッキや塗
装を施して完成させるものであった。Then, it was finished by polishing with a separate cloth, plating, or painting.
そこで、上記は金属薄板の塑性を利用して成形するもの
であるが、完成に至るまでの工程数が多く、しかも絞り
の深さや、形状によって一様ではなく、焼殺もの絞り工
程を要したり、又、折曲げ工程を経なければ製品が完成
されない欠点があり、その上地金は通常量も入手容易な
鉄板を使用しているので防錆処理を施す必要があった。Therefore, the above method utilizes the plasticity of a thin metal sheet to form it, but there are many steps required to complete it, and the drawing depth and shape vary, requiring a burning process. In addition, there is a drawback that the product cannot be completed without going through a bending process.Furthermore, since the base metal is usually an easily available iron plate, it is necessary to apply anti-corrosion treatment.
そこで、このようなロールやプレス成形品は工程数が多
いため人件費や型代なと費用が高くつくので合成樹脂に
よって成形することが多くなっているが、この合成樹脂
による場合は、合成樹脂原材料を加熱軟化させてから押
出し機によって成形金型内へ高圧で注入することにより
金型に倣った形状の製品を一挙に成形するものである。Therefore, such roll and press molded products are often molded using synthetic resin because they require a large number of steps and are expensive in terms of labor and mold fees. The raw material is heated and softened and then injected into a mold using an extruder under high pressure, thereby molding the product in a shape that follows the mold all at once.
従って、合成樹脂によると、金属をロールやプレス加工
する場合に比べて工程数が少なく、メッキや塗装による
防錆処理をする必要がなく生産性は前記ロールやプレス
成形による場合より逼かに良好である反面、合成樹脂成
形による場合は成形金型の製作費が高くなり、その上金
型の維持管理や成形条件を保つに熟練を要するなどの欠
点があった。Therefore, with synthetic resin, the number of steps is fewer than when metal is rolled or press-formed, and there is no need for anti-corrosion treatment such as plating or painting, and productivity is much better than when using rolls or press-forming. On the other hand, when using synthetic resin molding, the production cost of the molding mold is high, and in addition, skill is required to maintain the mold and maintain the molding conditions.
〈発明が解決しようとする問題点〉
本発明は、上記従来の加工方法の欠点に対処し、多くの
工程、それに精密金型、熟練を要する成形条件などの必
要のない加工方法とその装置の提供を図ることを目的と
する。<Problems to be Solved by the Invention> The present invention addresses the above-mentioned drawbacks of the conventional processing methods, and provides a processing method and its equipment that do not require many steps, precision molds, or molding conditions that require skill. The purpose is to provide the following information.
〈問題点を解決する為の手段〉
本発明は、軟化状態で供給される熱可塑性合成樹脂原材
料を、定速回動する主成型ロールと、これに対接して転
動する第1及び第2の成型ロールとの間に導びき、両ロ
ール間を通過後に切断急冷するようにしてなる。<Means for Solving the Problems> The present invention consists of a main molding roll that rotates at a constant speed, a main molding roll that rotates at a constant speed, and a first and second molding roll that rolls in opposition to the main molding roll, which rolls a thermoplastic synthetic resin raw material supplied in a softened state. After passing between both rolls, it is cut and rapidly cooled.
〈作用〉
押出し磯から押出された軟化状態にある合成樹脂を、充
分塑性のある間に主成型ロールと第1成型ロールとによ
って加圧することにより、進行方向の断面形状を所定形
状にすると共に、更に主成型ロールの型面と第27&形
ロールとで湾曲形状に形成され、これを必要な長さで切
断して変形しない間に速やかにこれを冷却して製品を安
定させる。<Function> By pressurizing the softened synthetic resin extruded from the extrusion rock with the main molding roll and the first molding roll while it is still sufficiently plastic, the cross-sectional shape in the direction of travel is made into a predetermined shape, Furthermore, a curved shape is formed by the mold surface of the main forming roll and the 27th &-shaped roll, and the product is stabilized by cutting it to a required length and quickly cooling it without deformation.
〈実施例〉
以下、本発明の加工方法及び装置について図面に示す実
施例により詳細に説明する。<Examples> Hereinafter, the processing method and apparatus of the present invention will be explained in detail with reference to examples shown in the drawings.
先ず、第1図及び第2図の曲げ加工装置Aは、機枠2に
主成型ロール1を袖3により横架枢支して、該軸3の一
端に嵌着した調車4と電動19i11の出力軸端の調車
との間に調帯を張設し、該電動機11の駆動により調帯
を介して前記主成型ロール1を定速回転するようにする
と共に、該主成型ロール1の外周面、即ち成形型面上に
は、進行方向の断面形状を定める第1の成型ロール5と
、進行方向に湾曲形成させる第2の成型ロール6を外接
させ、該画成型ロール5と、進行方向に湾曲形成させる
第2の成型ロール6を前記機枠2上に取付けた調整装置
8へ紬7によって回転自由に枢設し、該調整装置8の調
整ハンドル81を回動することにより、第1、第2成型
ロールと、主成型ロール1との接触圧を調整するように
している。First, the bending apparatus A shown in FIGS. 1 and 2 has a main forming roll 1 horizontally supported on a machine frame 2 by a sleeve 3, and a pulley 4 fitted on one end of the shaft 3 and an electric motor 19i11. A regulating band is provided between the output shaft end of the main forming roll 1 and the pulley at the end of the output shaft, and the main forming roll 1 is rotated at a constant speed via the controlling band by driving the electric motor 11. On the outer circumferential surface, that is, on the mold surface, a first molding roll 5 that defines the cross-sectional shape in the traveling direction and a second molding roll 6 that is curved in the traveling direction are circumscribed. A second forming roll 6 for forming a curve in the direction is rotatably pivoted by a pongee 7 to an adjusting device 8 mounted on the machine frame 2, and by rotating an adjusting handle 81 of the adjusting device 8, 1. The contact pressure between the second forming roll and the main forming roll 1 is adjusted.
そして、主成型ロール1の同心軸上に、該主成型ロール
1の外周面に対向する切断装置10(電磁弁によって動
作するエア一式その他何れでも良い。A cutting device 10 (an air set operated by a solenoid valve or any other device may be used) is disposed on the concentric axis of the main forming roll 1 and facing the outer peripheral surface of the main forming roll 1.
)を支持させ、該切断装置は切断動作中のみ該主成型ロ
ール1の外周に沿って同期速度で移動し、切断終了と同
時に最初の位置へ復帰するように該主成型ロール1の円
周上の成る定まった範囲内で反復するようにしている。), and the cutting device moves along the circumference of the main forming roll 1 at a synchronous speed only during the cutting operation, and returns to the initial position at the same time as the cutting is completed. I am trying to repeat it within a fixed range of .
更に、上記主成型ロール1は、その略下半部を機枠2の
側面部に静置した冷水槽9内に水没させており、該冷水
槽9内の水は冷却器(図示せず)を経て連続的に循環す
るようにしている。尚、上記において第27&型ロール
と切断装置との間にシャワ一式の予冷装置を設けて切断
時に形崩れを防止することもある。Further, the main forming roll 1 has its substantially lower half submerged in a cold water tank 9 placed on the side surface of the machine frame 2, and the water in the cold water tank 9 is supplied to a cooler (not shown). It is made to circulate continuously through the process. Incidentally, in the above, a pre-cooling device of a shower set may be provided between the 27th & mold roll and the cutting device to prevent deformation during cutting.
そして、上述のように構成された曲げ加工装置Aの側方
には合成樹脂原料を加熱軟化させて、材料aを押出す為
の押出しIIBを対設し、押出し口部に取付けたダイス
12から夫々の製品に必要な分量と、所定断面形状にし
て連続的に押出すようにしており、この押出された材料
aを該材料aの供給速度と同期速度で回転する主成型ロ
ール1の水切側において、該主成型ロール1と第1.第
2の成型ロール5,6との間に供給され、第1の成型ロ
ール5から次の第2の成型ロール6を経て移動する時形
成される。そして、上記主成型ロール1の型面と第1.
第2成型ロール5,6の型面の形状は、一般に夫々の製
品の形状によって異なるものとするが、この場合には、
調整ハンドル8′、8°を緩めて第1.第2成型ロール
を夫々主成型ロールから離して主成型ロール(大小あり
)と第1.第2成型ロール5,6を夫々付は替えること
により異った製品が得られる。Then, on the side of the bending device A configured as described above, an extruder IIB for heating and softening the synthetic resin raw material and extruding the material a is installed, and from the die 12 attached to the extrusion opening. The material a is continuously extruded in the amount required for each product and in a predetermined cross-sectional shape. In the main forming roll 1 and the first . It is supplied between the second forming rolls 5 and 6 and is formed when moving from the first forming roll 5 to the next second forming roll 6. Then, the mold surface of the main molding roll 1 and the first molding roll 1 are connected to each other.
The shapes of the mold surfaces of the second molding rolls 5 and 6 generally differ depending on the shape of each product, but in this case,
Loosen the adjustment handles 8' and 8° and adjust the 1st. The second forming rolls are separated from the main forming roll, respectively, and the main forming rolls (large and small) and the first forming roll are separated from each other. Different products can be obtained by changing the attachment of the second forming rolls 5 and 6, respectively.
その実例として第3図(1)(2)で示すように、断面
形状が半円形凸部1.を有する主成型ロール1と半円形
凹部51を有する第1.第2の成型ロール5.6とによ
つて製品す、が形成され、又断面形状が梯形凸部12を
有する主成型ロール1と平底状凹部52を有する第1.
第2の成型ロール5,6とでは製品b2が形成され、し
がも第4図に示すように完成品の側面形状は何れも主成
型ロール1の外周に倣って湾曲したものが得られる。こ
うして成形された中間製品は、更に主成型口〜ル1と共
に移動して行き、該主成型ロール1の所定回転角度毎に
動作する切断装置10の動作によって切断され、下部に
設けた冷水槽9内に落下浸漬し、冷えて形が安定する。As an example, as shown in FIGS. 3(1) and 3(2), a convex portion 1 with a semicircular cross-sectional shape. a main forming roll 1 having a shape and a first forming roll 1 having a semicircular recess 51; A product is formed by the second forming roll 5.6, and the main forming roll 1 has a trapezoidal convex portion 12 in cross-section and the first forming roll 1 has a flat-bottomed concave portion 52.
A product b2 is formed with the second forming rolls 5 and 6, and as shown in FIG. The intermediate product thus formed further moves together with the main molding roll 1 and is cut by the operation of a cutting device 10 that operates at every predetermined rotation angle of the main molding roll 1. It is immersed in water and cools down to stabilize its shape.
又、以上は曲げ加工装置の1例を示したが更に第5図に
示すように冷水槽9の左右に、略下半部を該冷水槽9に
潰したスプロケットホイール13゜13を枢設し、該ス
プロケットホイール13.13開に亘って張設した鎖帯
14上に半円形その他の任意曲面形状の移動型1..1
.・・・を等隔列設すると共に、上記鎖帯14の上向折
返端部において移動型に外接する成型ロール5を移動機
構15によって対設する。Furthermore, although one example of the bending device has been shown above, as shown in FIG. , a movable type 1. having a semicircular or other arbitrary curved shape is placed on the chain band 14 stretched across the sprocket wheel 13.13. .. 1
.. . . . are arranged at equal intervals, and a forming roll 5 circumscribing the movable die is disposed opposite to the movable die at the upward folded end of the chain band 14 by a moving mechanism 15.
そして、該成型ロール5とこれに接する移動型との間に
、押出しIBのダイス12から押出された材料aを供給
するように構成したものであっても良い。この場合も前
記同様に移動型11と成型ロール5との間に供給された
軟化状態にある材料は、矢印方向へ移動する移動型と、
成型ロール5との間で所定断面形状に加圧成形され、該
鎖帯14の循環経路の途中にあって切断動作の間だけ該
鎖帯14と同期速度で移動し、切断終了と同時に復帰す
るような間歇的に動作する切断装置を設けておき、供給
側と切離して製品を下位にある冷水槽9内に落下浸漬す
ることにより安定した製品が得られる。The material a extruded from the die 12 of the extrusion IB may be supplied between the forming roll 5 and a movable die in contact therewith. In this case as well, the softened material supplied between the movable die 11 and the forming roll 5 is connected to the movable die which moves in the direction of the arrow;
It is pressure-formed into a predetermined cross-sectional shape with the forming roll 5, is located in the middle of the circulation path of the chain band 14, moves at a speed synchronized with the chain band 14 only during the cutting operation, and returns at the same time as the cutting is completed. A stable product can be obtained by providing a cutting device that operates intermittently, disconnecting from the supply side, and dropping and immersing the product into the cold water tank 9 located below.
又、上記2つの実施例においては、製品の冷却手段とし
て冷水槽を用いたが、この池冷水をシャワーにして吹き
付けるか、或は冷風を吹き付けても良く、このような冷
水、冷風を吹き付けることにより、大型の水槽を必要と
せず、特に後者実施例のように鎖帯の循環方式による場
合には場所を取らず有効である。In addition, in the above two embodiments, a cold water tank was used as a means for cooling the product, but this pond cold water may be sprayed as a shower, or cold air may be sprayed. Therefore, there is no need for a large water tank, and especially when a chain belt circulation system is used as in the latter embodiment, it is effective without taking up much space.
〈発明の効果〉
本発明加工方法及び装置は、上述のようになり、材料を
気密金型内に封入することによってのみ成形可能である
とした従来の固定概念を打破し、軟化状態のうちにロー
ル間で成形するようにしたので精巧で複雑なプラスチッ
クの成形金型を全く必要としない為に金型式を大巾に削
減できる。<Effects of the Invention> The processing method and apparatus of the present invention are as described above, and break down the conventional fixed concept that molding is possible only by enclosing the material in an airtight mold. Since the molding is performed between rolls, there is no need for elaborate and complicated plastic molding molds, so the number of molds can be greatly reduced.
また、連続的に成形できて作業性が良く、大量生産に適
している。それに、構成が簡単であるため保守管理がこ
れまでのものに比べて著しく容易である。In addition, it can be continuously molded, has good workability, and is suitable for mass production. Moreover, since the configuration is simple, maintenance and management are significantly easier than previous ones.
更に、これまでの自転車、小児用事の泥除けのように金
属をプレスによって絞り加工するのと異なり、工程数が
少なく製作費が安くつき、また製作容易な主成型ロール
と、2つの成型ロールを交換するのみで断面形状と湾曲
形状の異なる図例の製品以外の種々のものが得られるな
ど多くの優れた効果を有する。Furthermore, unlike the conventional method of drawing metal using a press, such as mudguards for bicycles and children's errands, the number of processes is small, the production cost is low, and the main forming roll and two forming rolls are easy to manufacture. It has many excellent effects, such as being able to obtain various products other than the products shown in the example, which have different cross-sectional shapes and curved shapes, just by doing this.
第1図は、本発明加工装置の一部切欠正面図、第2図は
、同第1図のX−X断面図、
第3図<1)(2)は、夫々異なる成型ロールの断面形
状を示す部分拡大断面図
第4図は、泥除けの一例を示す正面図、第5図は、池の
装置例を示す部分切欠正面図である。Fig. 1 is a partially cutaway front view of the processing apparatus of the present invention, Fig. 2 is a sectional view taken along the line XX in Fig. 1, and Fig. 3 <1) and (2) show the different cross-sectional shapes of forming rolls. FIG. 4 is a front view showing an example of a mudguard, and FIG. 5 is a partially cutaway front view showing an example of a pond device.
Claims (1)
状態のプラスチック材料を、硬化前に、所定曲げ形状に
成形した後、規定長さに切断し、直ちに冷却処理するよ
うにしたことを特徴とするプラスチックの曲げ加工方法
。 2、定速回転する主成型ロールと、該主成型ロールの型
面に外接して転動する少なくとも2個の成型ロールと、
前記主成型ロールの周側面に対設した切断装置と、成形
品を冷却する冷却装置とからなり、前記主成型ロールと
前記成型ロールとの間に、押出し装置のダイスから押出
された軟化状態のプラスチック材料を導びき、未硬化中
に前記各ロールにより成形後、切断して直ちに冷却する
ようにしたことを特徴とするプラスチックの曲げ加工装
置。 3、曲面形状を有する主成型ロールを、無端帯上に複数
個等隔列設した移動型で構成したことを特徴とする特許
請求の範囲第2項記載のプラスチックの曲げ加工装置。 4、冷却装置として、冷水槽を用いたことを特徴とする
特許請求の範囲第2項記載のプラスチックの曲げ加工装
置。 5、冷却装置として、冷水又は冷風の噴射装置を用いた
ことを特徴とする特許請求の範囲第2項記載のプラスチ
ックの曲げ加工装置。[Claims] 1. A continuously supplied softened plastic material having approximately the cross-sectional shape of a product is formed into a predetermined bent shape before hardening, then cut into a specified length, and immediately cooled. A plastic bending method characterized by: 2. A main forming roll that rotates at a constant speed, and at least two forming rolls that roll in circumscribed contact with the mold surface of the main forming roll;
It consists of a cutting device installed opposite to the circumferential side of the main forming roll and a cooling device for cooling the molded product, and between the main forming roll and the forming roll, the softened material extruded from the die of the extrusion device is placed between the main forming roll and the forming roll. 1. A plastic bending apparatus, characterized in that a plastic material is guided and shaped by the rolls while uncured, then cut and immediately cooled. 3. The plastic bending apparatus according to claim 2, characterized in that the main forming rolls having a curved surface shape are constituted by a movable type in which a plurality of main forming rolls are arranged at equal intervals on an endless band. 4. The plastic bending apparatus according to claim 2, characterized in that a cold water tank is used as the cooling device. 5. The plastic bending apparatus according to claim 2, wherein a cold water or cold air injection device is used as the cooling device.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60073205A JPS61230921A (en) | 1985-04-05 | 1985-04-05 | Plastic bending process and its device |
KR1019850008529A KR860008018A (en) | 1985-04-05 | 1985-11-14 | Bending Process of Plastics and Its Apparatus |
US06/847,391 US4749535A (en) | 1985-04-05 | 1986-04-02 | Method and apparatus for forming profiled plastic products involving extrusion, roller shaping and cutting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60073205A JPS61230921A (en) | 1985-04-05 | 1985-04-05 | Plastic bending process and its device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61230921A true JPS61230921A (en) | 1986-10-15 |
Family
ID=13511416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60073205A Pending JPS61230921A (en) | 1985-04-05 | 1985-04-05 | Plastic bending process and its device |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS61230921A (en) |
KR (1) | KR860008018A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6211618A (en) * | 1985-07-10 | 1987-01-20 | Tsuneo Matsuda | Plastic molding and processing device |
JPH03176116A (en) * | 1989-11-06 | 1991-07-31 | Gencorp Inc | Device to handle bent extruded product |
-
1985
- 1985-04-05 JP JP60073205A patent/JPS61230921A/en active Pending
- 1985-11-14 KR KR1019850008529A patent/KR860008018A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6211618A (en) * | 1985-07-10 | 1987-01-20 | Tsuneo Matsuda | Plastic molding and processing device |
JPH03176116A (en) * | 1989-11-06 | 1991-07-31 | Gencorp Inc | Device to handle bent extruded product |
Also Published As
Publication number | Publication date |
---|---|
KR860008018A (en) | 1986-11-10 |
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