JPH0284306A - Composite parison forming apparatus - Google Patents
Composite parison forming apparatusInfo
- Publication number
- JPH0284306A JPH0284306A JP1218495A JP21849589A JPH0284306A JP H0284306 A JPH0284306 A JP H0284306A JP 1218495 A JP1218495 A JP 1218495A JP 21849589 A JP21849589 A JP 21849589A JP H0284306 A JPH0284306 A JP H0284306A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- parison
- flow path
- materials
- flow
- 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
- 239000002131 composite material Substances 0.000 title claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 54
- 239000010410 layer Substances 0.000 abstract description 19
- 238000001125 extrusion Methods 0.000 abstract description 14
- 239000002356 single layer Substances 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 14
- 229920001903 high density polyethylene Polymers 0.000 description 8
- 239000004700 high-density polyethylene Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical group C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000011157 advanced composite material Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
ある。然るに、二次的に固着する方法は智造工ｉ２をよ
り多く賢すだけでなく、必要な固着強度を確保すること
が要求される。[Detailed Description of the Invention] Yes. However, the method of secondary fixing requires not only increasing the size of the chip i2, but also ensuring the necessary fixing strength.
又、特に材料費が相対的に高価である樹脂成形品の製造
に於いては、成形工程で発生するロス部分の再利用は重
要な課題であるが、第１図に示した様な３層構造品の成
形に於いて発生するロスには多種類の材料が混在しその
再利用が容易でない。In addition, especially in the production of resin molded products where the material cost is relatively high, reusing the loss part generated in the molding process is an important issue, but three-layered products as shown in Figure 1 The loss that occurs during the molding of structural products includes many types of materials, making it difficult to reuse them.
本発明は以上の点に鑑みてなされたものであって、中空
成形品の各部を用途に応じた材質構成で一体に容易に成
形でき且つ発生するロス材料の再る。The present invention has been made in view of the above points, and it is possible to easily mold each part of a hollow molded product integrally with a material composition depending on the application, and to reduce the loss of material generated.
従米、第１図に示す如く、本体部分１は剛性に冨んだ内
、外層１ａ、１ｃの間に例えば断熱性に優れた発泡材１
ｂを侠んだ３層構造に形成され、ネジ山等の開栓手段を
一体に形成する為に特に剛性を必要とする口部２は剛性
に冨んだ単一材質から成る容器Ｃ＠を製造する場合、口
部２だけを別１男に成形し本体１に二次的に固着するの
が通常で以下、本発明の構成について、具体的な実施例
に基づき説明する。まず、本発明方法が実施される製造
装置の１実施例について、第２図の模式図に基づき説明
する。尚、本例の製造装置は、第３＜ａ ＞図に示す如
く蛇腹部Ｐ２を例えば低密度ポリエチレン（ＬＤ−ＰＥ
）等の軟質材料で形成し、他部分ＰＩＧ、Ｐｌ＋を高密
度ポリエチレン（ＨＤ−ＰＥ＞等の硬質材料で形成して
蛇膠部の伸縮性を向上させたバイブＰとか、ｉ３ （ｂ
）図に示す如く嵌合部Ｊ２を軟質材料で形成し他部分
Ｊ１を硬質材料で形成して嵌合性を改良した継手Ｊ、又
は第３（Ｃ）図に示す如く曲げ部Ｖ２を軟質材料で接合
部ｖ１を硬質材料で夫々形成し使用箇所への対応性を良
くしたエルボＶ等の如く、２種類の材質構成を有する９
究製品を製造することを目的とした＠置である。As shown in FIG. 1, the main body part 1 is made of a foam material 1 having excellent heat insulation properties, for example, between the inner and outer layers 1a and 1c, which have high rigidity.
The opening part 2, which is formed in a three-layer structure with a 3-layer structure and requires particular rigidity because the opening means such as a screw thread is integrally formed, is a container C@ made of a single material with high rigidity. When manufacturing, it is usual to mold only the mouth portion 2 into a separate piece and secure it secondarily to the main body 1.The structure of the present invention will be explained below based on specific examples. First, one embodiment of a manufacturing apparatus in which the method of the present invention is implemented will be described based on the schematic diagram of FIG. In addition, in the manufacturing apparatus of this example, as shown in FIG.
), the other parts PIG and Pl+ are made of a hard material such as high-density polyethylene (HD-PE), and the elasticity of the snakeskin part is improved.
) A joint J in which the fitting part J2 is made of a soft material and the other part J1 is made of a hard material as shown in the figure to improve fitting performance, or the bent part V2 is made of a soft material as shown in Fig. 3(C). 9 that has two types of material composition, such as the elbow V in which the joint part v1 is made of a hard material to improve adaptability to the location where it is used.
It is an @ place for the purpose of manufacturing research products.
第２図に於いて、云々の内部に形成された流路３ａ 、
４ａにスクリュー５が夫々配設されて成る２薇の第１．
第２パリソン押出１３．４が設けられており、その各先
端は共通のノズル６に連結されている。従って、各ホッ
パ（不図示）から供給された熱可塑性樹脂材料は、加熱
溶融されつつスクリュー５の回転と共にノズル６に向け
て各流路内を流動せしめられる。このノズル６は、送ら
れてくる樹脂材料を鉛直下方に注出すべく配設されてい
る。ノズル６の略中央部には、下端が先細状に形成され
たマンドレル６ａが鉛直に配置されており、口の中心部
には、コンプレッサ５ａ、等の加圧気体供給源に接続さ
れた過圧孔６ａ＋が穿ｚ９゜されている。このマンドレ
ル６ａの周囲には、第１流路７がマンドレル６ａの軸方
向に沿って形成されている。そして、更に第１流路７の
外側には内管部材６ｂにより第１ｉｊｉＬ路７から仕切
られた第２流路８が形成されていて、第２流路８はその
通流方向がマンドレル６ａの軸方向に沿う櫟に外管部材
６Ｃによりその通流土酸が形成されている。第１流路７
及び第２流路８の夫々の下端部はノズル６の下端面近傍
で合流し、パリソンの注出口６ｄを形成している。−万
、第１．第２各流路７．８の上方部分はノズル６の側面
方向に屈曲され、第１流路７は第１押出様３の流路３ａ
と、第２流路８は第２押出機４の流路４ａと、夫々連通
されている。尚、ノズル６の直下域には注出されたパリ
ソンを収容すると共にブロー成形を実施する金型セット
（不図示）が配設されている。In FIG. 2, the flow path 3a formed inside the
4a is provided with a screw 5, respectively.
A second parison extrusion 13.4 is provided, each tip of which is connected to a common nozzle 6. Therefore, the thermoplastic resin material supplied from each hopper (not shown) is heated and melted and made to flow in each flow path toward the nozzle 6 as the screw 5 rotates. This nozzle 6 is arranged to pour out the resin material sent vertically downward. A mandrel 6a having a tapered lower end is vertically arranged approximately at the center of the nozzle 6, and an overpressure pipe connected to a pressurized gas supply source such as a compressor 5a is located at the center of the mouth. A hole 6a+ is drilled at z9°. A first flow path 7 is formed around this mandrel 6a along the axial direction of the mandrel 6a. Furthermore, a second flow path 8 is formed outside the first flow path 7 and is partitioned from the first IjiL path 7 by an inner tube member 6b, and the flow direction of the second flow path 8 is the same as that of the mandrel 6a. The outer tube member 6C forms the flowing earth acid in the axial direction. First flow path 7
The lower end portions of the second flow path 8 join near the lower end surface of the nozzle 6 to form a spout 6d of the parison. -10,000, 1st. The upper part of each second channel 7.8 is bent in the side direction of the nozzle 6, and the first channel 7 is the channel 3a of the first extrusion type 3.
The second flow path 8 is communicated with the flow path 4a of the second extruder 4, respectively. A mold set (not shown) is disposed directly below the nozzle 6 to accommodate the poured parison and perform blow molding.
而して、例えば本例の如く各押出様３，４とノズル６と
の連絡部には、各流路３ａ 、４ａを適宜遮断可能なシ
ャットオフバルブ９．１０が介設されている。シャット
オフバルブ９，１０は、夫々制御手段１１に接続されて
おり、制御手段１１の指示に応じて各流路３ａ 、４ａ
を開閉する。従って、制御手段１１として例えばマイク
ロコンピュータ等を用い成形すべき製品の材質構成に応
じた適切なりＪ作パターンをプログラムとして記憶させ
ておき、これに沿って各シャットオフバルブを開閉すれ
ば、所望の材料構成でパリソンが注出形成される。尚、
この場合、各シャットオフバルブ９゜１０と各押出敦３
．４の動作を適宜運動させて各流路３ａ 、４ａ内の圧
力を異常に上昇させない様にすることが必要である。又
、注出されるパリソンの長さをノズル６の直下域近傍に
配置した光源ＬＳからの光ビームを光電管等の検知手段
ＰＤで捕え、制御手段１１がこの検知手段から送られて
くる信号に応じてシャットオフバルブ９，１０の動作を
制御する構成としても良い。For example, as in this example, a shutoff valve 9.10 is provided at the communication portion between each extrusion member 3, 4 and the nozzle 6, which can appropriately shut off each flow path 3a, 4a. The shutoff valves 9 and 10 are connected to a control means 11, respectively, and the respective flow paths 3a and 4a are closed according to instructions from the control means 11.
Open and close. Therefore, by using, for example, a microcomputer as the control means 11, and storing an appropriate production pattern as a program according to the material composition of the product to be molded, and opening and closing each shutoff valve according to this program, the desired result can be obtained. A parison is poured from the material composition. still,
In this case, each shutoff valve 9゜10 and each extrusion hole 3
．． It is necessary to appropriately move the operation of 4 to prevent the pressure in each flow path 3a, 4a from increasing abnormally. Further, the length of the parison to be poured is determined by detecting a light beam from a light source LS placed near the area directly below the nozzle 6 by a detection means PD such as a phototube, and controlling the control means 11 in response to a signal sent from this detection means. It is also possible to adopt a configuration in which the operation of the shutoff valves 9 and 10 is controlled.
次に、本発明方法の１実施例について、上述した製造装
置の動作に基づき説明する。ところで、第３ （ａ ’
）図に示した蛇腹部Ｐ２を有するバイブＰを製造する場
合は、原材料として前述した如く蛇腹部Ｐ２用の軟質性
樹脂として例えばＬＤ−ＰＥを、細部分Ｐｒｏ、Ｐｎ用
の硬質性樹脂としては例えばＨＤ−ＰＥを使用すれば良
いが、池の例えば硬質塩化ビニルと軟質塩化ビニル等の
組合せでも艮い。尚、軟質性樹脂と硬質性樹脂は互いに
溶融し易い本例の如き同系状の材料の組合せが境界部の
強度面等から望ましいが、親和性に乏しい材料の組合せ
でも接着剤等を介在させることにより適用することが可
能である。今、第１押出毀３にＨＤ−ＰＥを第２押出機
４にＬＤ−ＰＥを供給すべく押出標を選択する。そして
、流路３ａからシャフトオフバルブ９を介して第１流路
７を通り注出口６ｄに至る流路にはＨＤ−ＰＥを過渡さ
せ、他方の流路４ａからシャットオフバルブ１０を介し
て第２流路８を通り注出口６ｄに至る流路にはＬＤ−Ｐ
Ｅを通流させておく。Next, one embodiment of the method of the present invention will be described based on the operation of the above-mentioned manufacturing apparatus. By the way, the third (a'
) When manufacturing the vibe P having the bellows part P2 shown in the figure, as mentioned above, as raw materials, for example, LD-PE is used as a soft resin for the bellows part P2, and as a hard resin for the small parts Pro and Pn. For example, HD-PE may be used, but a combination of hard vinyl chloride and soft vinyl chloride may also be used. In addition, it is desirable to combine soft resin and hard resin with similar materials such as in this example, which easily melt each other, from the viewpoint of the strength of the boundary part, but even when combining materials with poor affinity, it is possible to interpose an adhesive or the like. It is possible to apply it by Now, an extrusion head is selected to supply HD-PE to the first extruder 3 and LD-PE to the second extruder 4. Then, HD-PE is passed through the flow path from the flow path 3a through the shaft off valve 9, through the first flow path 7, and to the spout 6d, and from the other flow path 4a through the shutoff valve 10, the There is an LD-P in the flow path that passes through the second flow path 8 and reaches the spout 6d.
Let E flow through it.
先ず、製品のバイブＰのＨＤ−ＰＥから成るＰＩａの部
分に相当するパリソン１）ｔｏを注出する為、バルブ９
を開いて第１押出搬３を稼動させると共に、バルブ１ｏ
を閉じて第２押出滋４を停止させる。バｌノソンρ１ｏ
が製品Ｐの９１０部分の長ざＬ ＋ａ部分に相当する長
さβ１ｏだけ注出されたら、マイクロコンピュータを備
えた制御手段１１は所定のブＯグラムに基づきバルブ９
を閉じて第１押出敦３をイ止させ、バルブ１０を開いて
第２押出８！Ｉ４を′ｆｊ、動させる。これにより、注
出されるパリソンｐの材料がバイブＰの蛇腹部Ｐ２に相
当するＬＤ−ＰＥ１．：Ｆ換えられる。この場合、各シ
ャットオフバルブ９．１０が注出口６ｄから離れている
為、シャフトオフバルブ９，１０の開閉動作に追従して
直ちに注出される材料が換わらず徐々に切り変えられる
。この為、図示される如く、その境界面が注出方向に対
して斜に形成されるが、それは実用上不都合のない程度
であり、又却って機械的強度が恢下する境界部の強度ア
ップに苔与する。ＬＤ−ＰＥからなるパリソン０２部分
が蛇腹部Ｐ２の長さＬ２に相当する長さのβ２だけ注出
されたら、同様に制御手段１１が、初めのパリソンＤｐ
ｔｒを注出した元の状態に各バルブと各押出滋の動作状
態を切換え、バイブＰのＰｎ部分に相当するＨＤ−ＰＥ
からなるパリソンを注出する。かくの如くして形成され
たバイブＰの材質構成に相当する材料構成を有するパリ
ソンｐをｉ下に配置した金型（不図示）内に収納して型
緬した後、通ぶ孔６ａ１がら加圧気体を吹き込みブロー
成形すれば、第３（ａ）図に示される１１０き伸縮性に
冨んだ蛇腹部Ｐ２を有するバイブＰを得ることができる
っ尚、上記実施例に於いては、シャフトオフバルブ９．
１０と第１．第２押出薇３．４の動作を運動させてパリ
ソンの注出材料の切換を行なったが、材料の境界部を比
較的長く見込める製品に対しては、シャフトオフバルブ
９．１０を省略し第１第２押出機３，４だけを制御手段
１１で駆動制御し所望の材料構成を有するパリソンを得
ることも可能である。First, in order to pour out the parison 1) corresponding to the PIa part made of HD-PE of the product Vibrator P, the valve 9 is
While opening the first extrusion conveyor 3, open the valve 1o.
is closed to stop the second extruder 4. Balnoson ρ1o
When a length β1o corresponding to the length L+a of the 910 part of the product P is poured out, the control means 11 equipped with a microcomputer controls the valve 9 based on a predetermined B Ogram.
is closed to stop the first extrusion 3, and the valve 10 is opened to start the second extrusion 8! Move I4 by 'fj. As a result, the material of the parison P to be dispensed is LD-PE1, which corresponds to the bellows P2 of the vibrator P. :F can be changed. In this case, since each of the shutoff valves 9 and 10 is apart from the spout 6d, the material to be poured out does not change immediately, but is changed gradually, following the opening and closing operations of the shaft off valves 9 and 10. For this reason, as shown in the figure, the boundary surface is formed obliquely with respect to the pouring direction, but this is to the extent that there is no practical inconvenience, and on the contrary, it is useful for increasing the strength of the boundary where the mechanical strength is reduced. Provide moss. When the parison 02 portion made of LD-PE is poured out by a length β2 corresponding to the length L2 of the bellows portion P2, the control means 11 similarly controls the parison Dp
Switch the operating state of each valve and each extruder to the original state when the tr was poured out, and HD-PE corresponding to the Pn part of the vibe P
Pour out a parison consisting of. After the parison P having a material composition corresponding to that of the vibrator P thus formed is housed in a mold (not shown) placed under i and molded, the through hole 6a1 is machined. By blow molding by blowing pressurized gas, it is possible to obtain a vibrator P having a bellows part P2 with 110 degrees of elasticity as shown in FIG. 3(a).In the above embodiment, the shaft Off valve9.
10 and 1st. The material to be poured into the parison was changed by moving the second extrusion valve 3.4, but for products where the boundary between materials can be expected to be relatively long, the shaft off valve 9.10 can be omitted and the second extrusion valve 3.4 can be omitted. It is also possible to drive and control only the first and second extruders 3 and 4 using the control means 11 to obtain a parison having a desired material composition.
次に、本発明装置の他の実施例について第４図の模式図
に基づき説明する。尚、以下の実施例に於いては、上記
実施例と同一構成要素については同−薄目を付しその説
明を省略する。本例に於いては、２種類の材料を通流さ
せる２系統の流路の開閉を、シャットオフバルブによら
ずにマンドレル１２を鉛直方向に移動させて１テなう構
成となっているユ即ち、第４図に示される如く、ノズル
６内に鉛直方向に移動自在に挿通支持されたマンドレル
１２の外部に突出した上部は例えば油圧装置等の駆動手
段１３に連結されている。この駆動手段１３は同様に制
御手段１１に接続されている。Next, another embodiment of the device of the present invention will be described based on the schematic diagram of FIG. 4. In the following embodiments, the same constituent elements as those in the above embodiments will be given the same weight and the explanation thereof will be omitted. In this example, a unit is constructed in which opening and closing of two flow channels through which two types of materials flow is done in one step by moving the mandrel 12 in the vertical direction without using a shutoff valve. That is, as shown in FIG. 4, the upper part of the mandrel 12, which is inserted and supported within the nozzle 6 so as to be vertically movable, is connected to a driving means 13 such as a hydraulic device. This drive means 13 is likewise connected to the control means 11 .
而して、マンドレル１２の注出口６ｄに近い下端部には
、その全周面に亘り突部１４が形成されている。又、こ
のマンドレル１２の周面に対向する内管部６ｂの内面６
ｂ＋の下端部で上記突部１４より若干上部に離れた位置
には、突部１５が突部１４と係合可能にその内周面に沿
って形成されている。従って、マンドレルを上下方向に
移動させることにより第１流路７が開閉されここを流動
する材料の流口を調節することができる。A protrusion 14 is formed at the lower end of the mandrel 12 near the spout 6d over its entire circumferential surface. Moreover, the inner surface 6 of the inner tube portion 6b facing the circumferential surface of this mandrel 12
A protrusion 15 is formed along the inner circumferential surface of the protrusion 14 so as to be able to engage with the protrusion 14 at a position slightly above and away from the protrusion 14 at the lower end of b+. Therefore, by moving the mandrel in the vertical direction, the first flow path 7 is opened and closed, and the flow opening of the material flowing therethrough can be adjusted.
本例の製造装置は、一部に２層構造を有する中空製品を
製造するのに都合が良い。即ち、第５図に示己れる如く
一部が２＠状に形成されたパリソンｐ−を注出する場合
、マンドレル１２を上昇させ各突部１４，１５を係合さ
せて剣１流路７を閉じた状態で初めの単層部Ｖ＋ を注
出し、この衰マンドレル１２を下降させて第１流路７を
開き２層部分０＝２を所定長ざ注出したのち再度マンド
レル１２を上昇させ（でＩ １ Ｎ路を閉じれば、所望
のパリソンｐ−が形成される。この場合、第１流路７を
開閉する突部１４．１５の位置が注出口６ｄに近い為、
第１流路７を流動する材料の流れが極めて応答性良く制
御され、２層部分１）−２と単層部Ｄ”＋の境界部の長
さを必要最小限に留めることができる。従って、単層部
ｐ−＋をロス部分として見込んで２層構造の中空成形品
をブロー成形すれば、ロス部分が大略単一材料となりロ
ス材料の回収率を大幅に上昇させることができる。The manufacturing apparatus of this example is convenient for manufacturing hollow products that partially have a two-layer structure. That is, when dispensing a parison p- whose part is formed into a 2@ shape as shown in FIG. The first single-layer portion V+ is poured out with the attenuation mandrel 12 closed, the first channel 7 is opened, and the two-layer portion 0=2 is poured out over a predetermined length, and then the mandrel 12 is raised again. (If the I 1 N path is closed, the desired parison p- is formed. In this case, since the position of the protrusion 14.15 that opens and closes the first flow path 7 is close to the spout 6d,
The flow of the material flowing through the first channel 7 is controlled with extremely good responsiveness, and the length of the boundary between the two-layer portion 1)-2 and the single-layer portion D"+ can be kept to the necessary minimum. Therefore, If a two-layer hollow molded product is blow-molded with the single layer part p-+ as a loss part, the loss part becomes substantially a single material, and the recovery rate of the loss material can be greatly increased.
尚、本例の装置により第３（ａ）図乃至第３（Ｃ）図に
示した構成を有する中空成形品を製造する場合、マンド
レル１２を下降させて第１流路７を開くと共に第２押出
薇４を停止させて材料の切換を行なえば艮い。又、２種
類のｉ注出材料の切換をより自在に行なう為には、第２
押出緊４の流路４ａにのみシャフトオフバルブ１０を設
ける構成としても良い。更に、内管部６ｂが上下方向に
移動自在となる様にノズル６を膚成し、第６図に示す如
く、第２７ＦＬ路８を形成する内管部６ｂの外周面と外
管ｉ６ｃの内周面に内管部６ｂを上昇ざぜることにより
係合可能に突部１６．１７な夫々形成してもよい。この
場合、内管部６ｂを上下動させることにより注出すべき
材料の切換を俊敏に実施できる。Note that when manufacturing a hollow molded product having the configuration shown in FIGS. 3(a) to 3(C) using the apparatus of this example, the mandrel 12 is lowered to open the first flow path 7 and the second flow path 7 is opened. All you have to do is stop the extruder 4 and change the material. In addition, in order to more freely switch between the two types of i-pouring materials, the second
The shaft off valve 10 may be provided only in the flow path 4a of the extrusion band 4. Furthermore, the nozzle 6 is formed so that the inner tube part 6b can move freely in the vertical direction, and as shown in FIG. Projections 16 and 17 may be formed on the circumferential surface so that they can be engaged by raising the inner tube portion 6b. In this case, by moving the inner tube portion 6b up and down, the material to be poured can be quickly changed.
次いで、本発明の更に他の実施例について第７図の模式
図に基づき説明する。本例の製造装置は第１図に示した
如く、２種類の材料からなり−５の材料を他方の材料で
挾んだサンドイッチ型３層溝造部分が形成された中空成
形品を製造するのに好適な装置である。この場合の互い
に親和性を有する好適な材料の組合せの例を示すと第１
表の如くなる。Next, still another embodiment of the present invention will be described based on the schematic diagram of FIG. 7. As shown in Fig. 1, the manufacturing apparatus of this example is capable of manufacturing a hollow molded product in which a sandwich-type three-layer grooved part is formed, which is made of two types of materials and sandwiching one material with the other. This device is suitable for An example of a suitable combination of materials having mutual affinity in this case is the first one.
It will look like the table.
第１表
尚、これらの他に親和性に乏しい樹脂材料の組合せも、
前述の実施例と同様に適切な接着剤を介在させることに
より適用可能となる。Table 1 In addition to these, there are also combinations of resin materials with poor affinity.
This can be applied by interposing a suitable adhesive in the same way as in the previous embodiments.
第７図に示される如く、本例のパリソン注出ノズル６に
は第１．第２．第３の３個の流路１８゜１９．２０が形
成されている。この的中間層材料を注出する第２流路１
９だけが第１押出機３に連通され、内、外層材料を注出
する第１．第３流路１８．２０は共に第２押出樫４に夫
々連通されている。そして、各押出機の流路３ａ、４ａ
には、第２図に示した実施例と同様にｉｉ１画手段１１
に接読されたシャットオフバルブ９，１ｏが介設されて
いる。As shown in FIG. Second. A third three flow channels 18°19.20 are formed. The second channel 1 for pouring out this target intermediate layer material
Only the first extruder 9 is connected to the first extruder 3, and the first extruder 9 is connected to the first extruder 3 for pouring out the inner and outer layer materials. The third channels 18, 20 both communicate with the second extrusion 4, respectively. And the flow paths 3a, 4a of each extruder
In this case, similarly to the embodiment shown in FIG.
Shutoff valves 9 and 1o, which are read directly from each other, are interposed.
従って、第１図に示した容器Ｃの３＠溝造の本体部分１
に相半するパリソンを注出すべき時間は双方のバルブ９
，１ｏを開いて３＠状のパリソン号庄出し、口部分２に
相当するパリソンを注出すべき時間はバルブ９を閉じて
中間層材料の注出を停止させて内、外層材料のみからな
るパリソンを連続的に注出すれば、容器Ｃの材質構成に
適応した材料溝底のパリソンを容易に得ることができる
。Therefore, the main body part 1 of container C shown in FIG.
The time at which the parison should be poured out is the time when both valves 9
, 1o is opened to pour out the 3@-shaped parison, and when it is time to pour out the parison corresponding to the mouth part 2, the valve 9 is closed to stop pouring out the middle layer material and the parison consisting of only the inner and outer layer materials is poured out. By pouring out continuously, it is possible to easily obtain a parison with a material groove bottom suitable for the material composition of the container C.
又、この場合、形成する各パリソン間のロス部分は大略
内、外層材料の単一樹脂材として発生する為、その再生
利用も効率良く且つ容易に実施できる。Further, in this case, since the loss portion between the parisons formed is generally generated as a single resin material of the inner and outer layer materials, its recycling can be carried out efficiently and easily.
尚、本実施例に於いても内管部分６ｂが上下方向に移動
可能となる様にノズル６を形成し、第２流路の開閉を注
出口６ｄ近傍に設けた係合突部対Ｔ：行なう構成とすれ
ば、パリソンの３層部分と単西部分の切換がより鋭敏に
行なわ３′ロス材の再生利用率もより向上する。又、３
芸の押出緊を設げ、第１流路１８と第３流路１つを夫々
別個の押出滋に個々のシャットオフバルブを介して連通
させる構成としても艮い。これにより、例えば内肩がＬ
Ｄ−ＰＥ、中間層がＥＶＡ（エチレン・ビニル・アセテ
ート）、外層がＨＤ−ＰＥから成る３種類の材料の３＠
偶造を有する中空成形品も容易に成形することができる
。In this embodiment as well, the nozzle 6 is formed so that the inner tube portion 6b is movable in the vertical direction, and the engagement protrusion pair T is provided in the vicinity of the spout 6d to open and close the second flow path. If this configuration is adopted, the switching between the three layer portion and the single western portion of the parison can be performed more sharply, and the recycling rate of the 3' loss material can be further improved. Also, 3
It is also possible to provide a structure in which a separate extruder is provided, and one first flow path 18 and one third flow path are communicated with separate extruder through individual shut-off valves. This allows, for example, the inner shoulder to
Three types of materials: D-PE, the middle layer is EVA (ethylene vinyl acetate), and the outer layer is HD-PE.
Hollow molded products with irregularities can also be easily molded.
以上詳、ｊボした如く、本発明によれば、成形すべき製
品の材質構成に対応して複種類の材料の注出を制御しパ
リソンを形成することにより、用途に応じた複合材質を
備えた中空成形品を容易に成形可能となる。又、項数の
材料から成る中空成形品の成形毎に発生するロス材が単
一の材料となる様に材料注出を制御できる為、ロス材の
再生利用率を大幅に向上させることができる。従って、
用途に通した複合材質を有する高品質の中空成形品を安
価に製造可能となる。尚、本発明は上記の１稈定の実施
例に限定されるべきものではなく、本発明の技術的範囲
に於いて種々の変形が可能である−とは勿論である。例
えば、押出深とノズルに形成される流路の各数を適切に
組合せることにより３種類の材料から成る５層構造を有
する中空成形品等のより冒度な複合材質を備えた中空成
形品も容易に製造することが可能となる。As described in detail above, according to the present invention, by controlling the pouring of multiple types of materials to form a parison in accordance with the material composition of the product to be molded, it is possible to prepare a parison with a composite material according to the purpose. It becomes possible to easily mold hollow molded products. In addition, material pouring can be controlled so that the loss material generated each time a hollow molded product made of a number of materials is formed into a single material, so the recycling rate of loss material can be greatly improved. . Therefore,
It becomes possible to manufacture high-quality hollow molded products with composite materials suitable for various purposes at low cost. It should be noted that the present invention is not limited to the above-described one-culm embodiment, and it goes without saying that various modifications can be made within the technical scope of the present invention. For example, hollow molded products with more advanced composite materials, such as hollow molded products that have a five-layer structure made of three types of materials by appropriately combining the extrusion depth and the number of channels formed in the nozzle. can also be easily manufactured.
第１図は３Ｍ溝造を有する容器Ｃを示した模式的断面図
、第２図は本発明の１実施例を示した模式図、第３（ａ
〉図乃至第３（Ｃ）図は夫々２種類の材質を備えた中空
成形品を示した各説明図、第４図は不発明の他の実施例
を示した模式図、第５図は２Ｈ構逼品用のパリソンｐ−
を示した説明図、第６図は第４図に示した実施例の変形
例を示した説明図、第７図は本発明の更に他の実施例を
示した模式図である。
７．１８：
８．１９：
９．１０：
１１ ：
１４１５．１６．１７
２０ ：
左１流路
第２流路
シャットオフバルブ
制御手段
係合突部
第３流路FIG. 1 is a schematic cross-sectional view showing a container C having a 3M groove structure, FIG. 2 is a schematic view showing an embodiment of the present invention, and FIG.
〉Figures to Figures 3(C) are explanatory diagrams each showing a hollow molded product with two types of materials, Figure 4 is a schematic diagram showing another embodiment of the invention, and Figure 5 is a 2H Parison p- for structural items
FIG. 6 is an explanatory diagram showing a modification of the embodiment shown in FIG. 4, and FIG. 7 is a schematic diagram showing still another embodiment of the present invention. 7.18: 8.19: 9.10: 11: 1415.16.17 20: Left 1st flow path 2nd flow path Shut-off valve control means engaging protrusion 3rd flow path
Claims (1)
へ送給する２つの供給路と、前記２つの供給路の一方の
供給路を前記合流点において選択的に開閉動作する供給
口閉塞手段を有することを特徴とする複合パリソン形成
装置。1. Two supply channels that melt the raw material and feed it to the spout via a confluence point near the spout, and a supply port that selectively opens and closes one of the two supply channels at the confluence point. A composite parison forming device, characterized in that it has a closing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1218495A JPH0615168B2 (en) | 1989-08-28 | 1989-08-28 | Compound parison forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1218495A JPH0615168B2 (en) | 1989-08-28 | 1989-08-28 | Compound parison forming device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59022993A Division JPS60168625A (en) | 1983-04-28 | 1984-02-13 | Manufacture of hollow molded article provided with composite material and manufacturing device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0284306A true JPH0284306A (en) | 1990-03-26 |
| JPH0615168B2 JPH0615168B2 (en) | 1994-03-02 |
Family
ID=16720828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1218495A Expired - Lifetime JPH0615168B2 (en) | 1989-08-28 | 1989-08-28 | Compound parison forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615168B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04113925U (en) * | 1991-03-26 | 1992-10-06 | 宇部興産株式会社 | blow molding machine |
| JP2010147481A (en) * | 1998-03-30 | 2010-07-01 | Toshiba Corp | Noise reducing element, and semiconductor circuit element using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5237026A (en) * | 1975-09-17 | 1977-03-22 | Matsushita Electric Ind Co Ltd | Dropout prevention method |
| JPS54133562A (en) * | 1978-04-10 | 1979-10-17 | Ishikawajima Harima Heavy Ind Co Ltd | Parison comtroller for blow molding machine |
| US4276250A (en) * | 1979-10-29 | 1981-06-30 | Sherwood Medical Industries, Inc. | Apparatus and method for producing tubular extrusions having axial sections of materials having different characteristics |
| JPS5753175A (en) * | 1980-09-16 | 1982-03-30 | Nec Corp | Absence transfer system |
-
1989
- 1989-08-28 JP JP1218495A patent/JPH0615168B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5237026A (en) * | 1975-09-17 | 1977-03-22 | Matsushita Electric Ind Co Ltd | Dropout prevention method |
| JPS54133562A (en) * | 1978-04-10 | 1979-10-17 | Ishikawajima Harima Heavy Ind Co Ltd | Parison comtroller for blow molding machine |
| US4276250A (en) * | 1979-10-29 | 1981-06-30 | Sherwood Medical Industries, Inc. | Apparatus and method for producing tubular extrusions having axial sections of materials having different characteristics |
| JPS5753175A (en) * | 1980-09-16 | 1982-03-30 | Nec Corp | Absence transfer system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04113925U (en) * | 1991-03-26 | 1992-10-06 | 宇部興産株式会社 | blow molding machine |
| JP2010147481A (en) * | 1998-03-30 | 2010-07-01 | Toshiba Corp | Noise reducing element, and semiconductor circuit element using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0615168B2 (en) | 1994-03-02 |
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| EXPY | Cancellation because of completion of term |