JP2005014541A - Pipe material insert structure in resin molded article and pipe material insert equipment therefor - Google Patents

Pipe material insert structure in resin molded article and pipe material insert equipment therefor Download PDF

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Publication number
JP2005014541A
JP2005014541A JP2003185983A JP2003185983A JP2005014541A JP 2005014541 A JP2005014541 A JP 2005014541A JP 2003185983 A JP2003185983 A JP 2003185983A JP 2003185983 A JP2003185983 A JP 2003185983A JP 2005014541 A JP2005014541 A JP 2005014541A
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Prior art keywords
pipe material
resin molded
molded product
molding
molded article
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JP2003185983A
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Japanese (ja)
Inventor
Toru Inagaki
亨 稲垣
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Aitec Co Ltd
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Aitec Co Ltd
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Priority to JP2003185983A priority Critical patent/JP2005014541A/en
Publication of JP2005014541A publication Critical patent/JP2005014541A/en
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    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/665—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using shrinking during 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7428—Transition metals or their alloys
    • B29C66/74283—Iron or alloys of iron, e.g. steel

Abstract

<P>PROBLEM TO BE SOLVED: To let the fore end of a pipe off into a recess space to the extent of shrinkage even when a molded article shrinks due to molding shrinkage. <P>SOLUTION: In a pipe material insert structure in a resin molded article made by insert molding of a pipe material in the article, the recess space is provided in the opposite ends of the pipe material in the resin molded article and the end edge of the pipe material is made open to the recess space. By this constitution, occurrence of deformation or distortion in the resin molded article can be prevented, though the pipe materials different in qualities are inserted. When the lateral side of a portion of the pipe material is exposed on the outer wall surface of the resin molded article and a notched step part is formed in the contact edge of the pipe material on this outer wall surface, moreover, this notched step part is bent on the occasion of the molding shrinkage after molding and thereby a shrinkage stress can be absorbed. Therefore the occurrence of deformation or distortion in the width direction of the pipe material can also be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【産業上の利用分野】
この発明は樹脂成形品におけるパイプ材インサート構造及びそのパイプ材インサート装置に関しデッキボード，シートバックボードなどの自動車用成形品、建築物の内装壁，パーテーション，扉などのパネル状の建築用成形品のような合成樹脂成形品にパイプ材をインサートする場合に使用される。
【０００２】
【従来の技術】
従来、ブロー成形によってパイプ材をインサートする場合、エアー抜けや樹脂漏れを防止する必要上パイプ材の両端を適宜手段によって塞ぎ、この両端を塞いだ状態のパイプ材を成形型の成形面に設置し、樹脂成形と同時にこのパイプ材を樹脂成形品にインサートしていた。
【０００３】
【特許文献１】特開平１０−１５６８６４号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、パイプ材は樹脂と材質が異なるため、成形後に樹脂は成形収縮するがパイプ材は殆ど寸法が変化しない結果、樹脂成形品に変形や歪みが発生しやすいという不都合を有した。
また、そのインサート工程において、前記パイプの両端を塞ぐ作業は、パイプ毎にしなければならないため、その作業に手間がかかり、ひいては、パイプ材のインサート成形の作業能率を向上させにくいという不都合を有した。
【０００５】
この発明の課題はこれらの不都合を解消することである。
【０００６】
【課題を解決するための手段】
前記課題を達成するために、この発明に係る樹脂成形品におけるパイプ材インサート構造においては、樹脂成形品にパイプ材をインサート成形した樹脂成形品におけるパイプ材インサート構造において、前記樹脂成形品における前記パイプ材の両端に凹部空間を設け、この凹部空間に前記パイプ材の端縁を開放したため、成形収縮による成形品が収縮してもその収縮分だけパイプの先端が前記凹部空間に逃げることができる。
【０００７】
なお、前記パイプ材の一部側面を前記樹脂成形品の外壁面から露出させるとともにこの外壁面における前記パイプ材の接触縁に切り欠き段部を形成すれば、成形後の成形収縮の際にこの切り欠き段部が折れ曲がり、収縮応力を吸収することができる。
【０００８】
また、前記課題を達成するために、この発明に係る樹脂成形品におけるパイプ材インサート装置においては、成形型の成形面に所定間隔を介してパイプ材支持片を突出させ、この一対の支持片の間にインサート用パイプ材をその両端から支持可能としたため、パイプ材を成形型にセットしやすいとともに、ブロー成形によって樹脂成形品にパイプ材をインサートした際に、前記成形型におけるパイプ材支持片によって当該パイプ材の両端に前記凹部空間を形成することができるとともに前記支持片によってインサート用パイプ材の両端開口が塞がれるため附属品（蓋等）を用いなくてもブロー成形の際に空気および樹脂が侵入することはない。
【０００９】
なお、前記成形型の成形面における前記一対の支持片の間に一対の段部形成凸条を所定間隔を介して設ければ、段部形成凸条によってパイプ材の両側面を支持するためパイプ材を成形型により一層セットしやすいとともに、ブロー成形によって樹脂成形品にパイプ材をインサートした際に、前記成形型における段部形成凸条によって当該パイプ材の両側に前記切り欠き段部を形成することができるものである。
【００１０】
【実施の態様】
この発明における合成樹脂成形品の原料としては、ポリエチレン，ポリプロピレン，エチレンー酢酸ビニル共重合体，塩化ビニル，ＡＢＳ樹脂，ナイロン，ポリエステル等、軟質、硬質及び弾性状の熱可塑性樹脂が一例として挙げられる。
【００１１】
この発明におけるパイプ材の材質としては、鉄，アルミニウム，ステンレス等の金属が一例として揚げられる。
【００１２】
【実施例】
図１は本発明に係る樹脂成形品におけるパイプ材インサート構造の斜視図、図２は図１におけるＩＩ−ＩＩ線断面図、図３は同ＩＩＩ −ＩＩＩ 線断面図である。。また、図４はパイプ材インサート装置の断面図、図５は図４におけるＶ−Ｖ線断面の部分図である。
【００１３】
図１〜図３において、１０はこの発明に係る合成樹脂中空成形品（この発明の「樹脂成形品」に相当する。以下、「中空成形品」と記す）である。この中空成形品１０は中空パネル状をしており、熱可塑性樹脂をブロー成形することによって形成される。
【００１４】
Ｐは金属製パイプ材であり、前記中空成形品１０の外壁面に側面の一部を露出させた状態でインサートされている。このパイプ材Ｐは断面が等脚台形状であり、そのその上底側を露出させている。このパイプ材Ｐのインサートは前記中空成形品１０の成形時に一体的に行われる。なお、前記パイプ材Ｐはインサートしたときにアンダーカットのできる断面形状を有するものであればよく、前記台形状の他に丸形状，三角形状等であってもよい。
【００１５】
１１は凹部空間であり、前記中空成形品１０の外壁面における前記パイプ材Ｐの両端に形成されている（図面では片方のみ示している）。この凹部空間１１の内壁面に前記パイプ材Ｐの端縁が開放されている。このため、前記中空成形品１０が成形後に樹脂収縮しても、前記パイプ材Ｐの両端は前記凹部空間１１に逃げることができる。
【００１６】
１２，１２ は切り欠き段部であり、前記中空成形品１０の外壁面におけるパイプ材Ｐの接触縁に形成されている。この切り欠き段部１２，１２ は前記パイプ材Ｐの側面に沿って延びている。このため、前記中空成形品１０が成形後に樹脂収縮してもこの切り欠き段部１２，１２ が図３に仮想線で示すように折れ曲がり収縮応力を吸収する結果、パイプ材Ｐの幅方向における前記中空成形品１０の変形や歪みの発生を防止できる。
【００１７】
次に、図４及び図５に基づいてこの発明に係る樹脂成形品におけるパイプ材インサート装置について説明する。
【００１８】
図において、３０，３１ はブロー成形用成形型、３２，３３ はその成形面である。５０は下端が閉鎖されたパリスンである。このパリスン５０は開いた成形型３０，３１ の間に配置されている。
【００１９】
３５，３６ はパイプ材支持片であり、前記成形型３１の成形面３３に所定間隔を介してを突設されている。このパイプ材支持片３５，３６ は前記中空成形品１０に前記パイプ材Ｐをインサートした際に当該パイプ材Ｐの両端に前記凹部空間１１を形成するためのものである。また、このパイプ材支持片３５，３６ の間隔は前記パイプ材Ｐの長さに略等しく、パイプ材Ｐをその両端から支持することができるため前記パイプ材を前記成形型３１にセットしやすいものである。
【００２０】
３７，３８ は段部形成凸条であり、前記成形型３１の成形面３３において、前記一対のパイプ材支持片３５，３６ 間に所定間隔を介して略平行に突設されている。この一対の段部形成凸条３７，３８ は前記中空成形品１０に前記パイプ材Ｐをインサートした際に当該パイプ材Ｐの側面における前記中空成形品１０の外壁面に前記切り欠き段部１２を形成するためのものである。また、この段部形成凸条３７，３８ は、前記一対のパイプ材支持片３５，３６ の間に前記パイプ材Ｐを設置したときにこのパイプ材Ｐを更にその両側面から支持することができるため前記パイプ材を前記成形型３１により一層セットしやすいものである。
【００２１】
図４及び図５に示すように、前記成形型３１における前記一対のパイプ材支持片３５，３６ と前記段部形成凸条３７，３８ とによって囲まれる部分に、前記パイプ材Ｐをはめ込んだ状態で、前記パリスン５０に空気を空気を吹き込み、前記成形型３０，３１ を閉鎖させる。すると、前記パリスン５０は前記成形面３３に加圧接触して所定形状に成形されながら、前記パイプ材Ｐをインサートし、図１〜図３に示した中空成形品１０を形成する。
【００２２】
上記実施例では、合成樹脂成形品として合成樹脂製中空成形品を採り上げたが合成樹脂中実成形品をも含まれるものである。
【００２３】
【発明の効果】
この発明に係るパイプ材インサート構造は、樹脂成形品にパイプ材をインサート成形した樹脂成形品におけるパイプ材インサート構造において、前記樹脂成形品における前記パイプ材の両端に凹部空間を設け、この凹部空間に前記パイプ材の端縁を開放したため、成形収縮による成形品が収縮してもその収縮分だけパイプの先端が前記凹部空間に逃げることができる。
【００２４】
よって、この樹脂成形品におけるパイプ材インサート構造を使用すれば、異なった材質のパイプ材をインサートするにも関わらず樹脂成形品に変形や歪みの発生するのを防止することができる。
【００２５】
なお、前記パイプ材の一部側面を前記樹脂成形品の外壁面から露出させるとともにこの外壁面における前記パイプ材の接触縁に切り欠き段部を形成すれば、成形後の成形収縮の際にこの切り欠き段部が折れ曲がり、収縮応力を吸収することができるため、パイプ材の幅方向における樹脂成形品の変形や歪みの発生をも防止できる。
【００２６】
また、この発明に係る樹脂成形品におけるパイプ材インサート装置は、成形型の成形面に所定間隔を介してパイプ材支持片を突出させ、この一対の支持片の間にインサート用パイプ材をその両端から支持可能としたため、パイプ材を成形型にセットしやすいとともに、ブロー成形によって樹脂成形品にパイプ材をインサートした際に、前記成形型におけるパイプ材支持片によって当該パイプ材の両端に前記凹部空間を形成することができるとともに前記支持片によってインサート用パイプ材の両端開口が塞がれるため附属品（蓋等）を用いなくてもブロー成形の際に空気および樹脂が侵入することはない。
【００２７】
よって、この樹脂成形品におけるパイプ材インサート装置を使用すれば、パイプ材（インサートされたもの）の両端に凹部空間を有する樹脂成形品を簡易に製造しやすいものである。
【００２８】
なお、前記成形型の成形面における前記一対の支持片の間に一対の段部形成凸条を所定間隔を介して設ければ、段部形成凸条によってパイプ材の両側面を支持するためパイプ材を成形型により一層セットしやすいとともに、ブロー成形によって樹脂成形品にパイプ材をインサートした際に、前記成形型における段部形成凸条によって当該パイプ材の両側に前記切り欠き段部を形成することができ、パイプ材（インサートされたもの）の両側に切り欠き段部を有する樹脂成形品を簡易に製造しやすいものである。
【図面の簡単な説明】
【図１】図１は本発明に係る樹脂成形品におけるパイプ材インサート構造の斜視図である。
【図２】図２は図１におけるＩＩ−ＩＩ線断面図である。
【図３】図３は同ＩＩＩ −ＩＩＩ 線断面図である。
【図４】図４はパイプ材インサート装置の断面図である。
【図５】図５は図４におけるＶ−Ｖ線断面の部分図である。
【符号の説明】
１０ … 合成樹脂製中空成形品（合成樹脂製成形品）
１１ … 凹部空間
１２ … 切り欠き段部
３１ … ブロー成形用成形型（成形型）
３３ … 成形面
３５ … パイプ材支持片
３６ … パイプ材支持片
３７ … 段部形成凸条
３８ … 段部形成凸条
Ｐ … パイプ材[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a pipe material insert structure in a resin molded product and a pipe material insert device for automotive molded products such as deck boards and seat back boards, and panel-shaped architectural molded products such as interior walls, partitions, and doors of buildings. It is used when inserting a pipe material into such a synthetic resin molded product.
[0002]
[Prior art]
Conventionally, when pipe material is inserted by blow molding, it is necessary to prevent air leakage and resin leakage, so that both ends of the pipe material are closed by appropriate means, and the pipe material with both ends closed is placed on the molding surface of the mold. At the same time as the resin molding, this pipe material was inserted into the resin molded product.
[0003]
[Patent Document 1] Japanese Patent Application Laid-Open No. 10-156864
[Problems to be solved by the invention]
However, since the material of the pipe material is different from that of the resin, the resin is molded and contracted after molding, but the size of the pipe material is hardly changed. As a result, the resin molded product is likely to be deformed or distorted.
Further, in the insert process, the work for closing both ends of the pipe must be performed for each pipe, so that the work is troublesome, and consequently, it is difficult to improve the work efficiency of pipe material insert molding. .
[0005]
An object of the present invention is to eliminate these disadvantages.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the pipe material insert structure in the resin molded product according to the present invention, in the pipe material insert structure in the resin molded product in which the pipe material is insert molded into the resin molded product, the pipe in the resin molded product Since the recessed space is provided at both ends of the material and the end edge of the pipe material is opened in the recessed space, the tip of the pipe can escape into the recessed space by the contracted amount even when the molded product contracts due to molding contraction.
[0007]
In addition, if a part of the pipe material is exposed from the outer wall surface of the resin molded product and a notch step is formed at the contact edge of the pipe material on the outer wall surface, the molding material shrinks after molding. The notch step is bent, and the shrinkage stress can be absorbed.
[0008]
In order to achieve the above object, in the pipe material insert device in a resin molded product according to the present invention, a pipe material support piece is protruded from the molding surface of the mold at a predetermined interval, and the pair of support pieces Since the pipe material for inserts can be supported from both ends, it is easy to set the pipe material in the mold, and when the pipe material is inserted into the resin molded product by blow molding, the pipe material support piece in the mold The recessed space can be formed at both ends of the pipe material, and the opening of both ends of the pipe material for insert is closed by the support piece, so that air and air can be blown during blow molding without using an accessory (such as a lid). The resin does not enter .
[0009]
In addition, if a pair of step forming ridges are provided between the pair of support pieces on the forming surface of the mold at a predetermined interval, the pipes support both side surfaces of the pipe material by the step forming ridges. It is easier to set the material with the molding die, and when the pipe material is inserted into the resin molded product by blow molding, the notched step portions are formed on both sides of the pipe material by the step forming protrusions in the molding die. Is something that can be done.
[0010]
Embodiment
Examples of the raw material of the synthetic resin molded product in the present invention include soft, hard and elastic thermoplastic resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, vinyl chloride, ABS resin, nylon and polyester.
[0011]
As a material of the pipe material in the present invention, metals such as iron, aluminum, and stainless steel are fried as an example.
[0012]
【Example】
1 is a perspective view of a pipe material insert structure in a resin molded product according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III. . 4 is a cross-sectional view of the pipe material insert device, and FIG. 5 is a partial view taken along the line VV in FIG.
[0013]
1 to 3, reference numeral 10 denotes a synthetic resin hollow molded product according to the present invention (corresponding to a “resin molded product” of the present invention, hereinafter referred to as “hollow molded product”). The hollow molded product 10 has a hollow panel shape and is formed by blow molding a thermoplastic resin.
[0014]
P is a metal pipe material, and is inserted into the outer wall surface of the hollow molded article 10 with a part of the side surface exposed. The pipe material P has an isosceles trapezoidal cross section, and its upper bottom side is exposed. The pipe material P is inserted integrally when the hollow molded article 10 is molded. The pipe material P only needs to have a cross-sectional shape that can be undercut when inserted, and may have a round shape, a triangular shape, or the like in addition to the trapezoidal shape.
[0015]
Reference numeral 11 denotes a recessed space, which is formed at both ends of the pipe material P on the outer wall surface of the hollow molded article 10 (only one is shown in the drawing). An end edge of the pipe material P is opened on the inner wall surface of the recessed space 11. For this reason, both ends of the pipe material P can escape to the recessed space 11 even if the hollow molded article 10 shrinks after molding.
[0016]
Reference numerals 12 and 12 denote notch steps, which are formed at the contact edge of the pipe material P on the outer wall surface of the hollow molded article 10. The notch steps 12 and 12 extend along the side surface of the pipe material P. For this reason, even if the hollow molded article 10 is resin-shrinked after molding, the notch steps 12 and 12 are bent as shown by phantom lines in FIG. The deformation and distortion of the hollow molded product 10 can be prevented.
[0017]
Next, a pipe material insert device in a resin molded product according to the present invention will be described with reference to FIGS.
[0018]
In the figure, 30 and 31 are blow molding molds, and 32 and 33 are molding surfaces thereof. Reference numeral 50 denotes a Paris whose lower end is closed. The parison 50 is disposed between the open molds 30 and 31.
[0019]
Reference numerals 35 and 36 denote pipe material support pieces, which project from the molding surface 33 of the molding die 31 at a predetermined interval. The pipe material support pieces 35 and 36 are for forming the recessed spaces 11 at both ends of the pipe material P when the pipe material P is inserted into the hollow molded article 10. Further, the interval between the pipe material support pieces 35 and 36 is substantially equal to the length of the pipe material P, and since the pipe material P can be supported from both ends, the pipe material can be easily set on the mold 31. It is.
[0020]
Numerals 37 and 38 are step-forming ridges, and project from the molding surface 33 of the molding die 31 between the pair of pipe material support pieces 35 and 36 substantially in parallel with a predetermined interval. When the pipe material P is inserted into the hollow molded article 10, the pair of step-forming ridges 37, 38 are provided with the notched step 12 on the outer wall surface of the hollow molded article 10 on the side surface of the pipe material P. It is for forming. The step forming ridges 37 and 38 can further support the pipe material P from both side surfaces when the pipe material P is installed between the pair of pipe material support pieces 35 and 36. Therefore, the pipe material is more easily set by the molding die 31.
[0021]
As shown in FIGS. 4 and 5, the pipe material P is fitted in a portion surrounded by the pair of pipe material support pieces 35 and 36 and the step-forming ridges 37 and 38 in the mold 31. Then, air is blown into the Paris 50, and the molds 30, 31 are closed. Then, while the Paris 50 is press-contacted to the molding surface 33 and molded into a predetermined shape, the pipe material P is inserted to form the hollow molded product 10 shown in FIGS.
[0022]
In the above embodiment, a synthetic resin hollow molded product is used as the synthetic resin molded product, but a synthetic resin solid molded product is also included.
[0023]
【The invention's effect】
The pipe material insert structure according to the present invention is a pipe material insert structure in a resin molded product in which a pipe material is insert-molded in a resin molded product, wherein a recessed space is provided at both ends of the pipe material in the resin molded product. Since the edge of the pipe material is opened, the tip of the pipe can escape into the recess space by the amount of contraction even if the molded product contracts due to molding contraction.
[0024]
Therefore, if the pipe material insert structure in this resin molded product is used, it is possible to prevent the resin molded product from being deformed or distorted even though a pipe material of a different material is inserted.
[0025]
In addition, if a part of the pipe material is exposed from the outer wall surface of the resin molded product and a notch step is formed at the contact edge of the pipe material on the outer wall surface, the molding material shrinks after molding. Since the notch step is bent and the shrinkage stress can be absorbed, it is possible to prevent deformation and distortion of the resin molded product in the width direction of the pipe material.
[0026]
Further, the pipe material insert device in the resin molded product according to the present invention has a pipe material support piece protruding from the molding surface of the mold at a predetermined interval, and the insert pipe material is inserted between the pair of support pieces at both ends thereof. Since the pipe material can be easily set in the molding die, and the pipe material is inserted into the resin molded product by blow molding, the concave space is formed at both ends of the pipe material by the pipe material support pieces in the molding die. Since both ends of the insert pipe member are closed by the support piece, air and resin do not enter during blow molding without using an accessory (such as a lid) .
[0027]
Therefore, if the pipe material insert device in this resin molded product is used, a resin molded product having recessed spaces at both ends of the pipe material (inserted) can be easily manufactured.
[0028]
In addition, if a pair of step forming ridges are provided between the pair of support pieces on the forming surface of the mold at a predetermined interval, the pipes support both side surfaces of the pipe material by the step forming ridges. It is easier to set the material with the molding die, and when the pipe material is inserted into the resin molded product by blow molding, the notched step portions are formed on both sides of the pipe material by the step forming protrusions in the molding die. It is possible to easily manufacture a resin molded product having notched step portions on both sides of the pipe material (inserted).
[Brief description of the drawings]
FIG. 1 is a perspective view of a pipe material insert structure in a resin molded product according to the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a sectional view taken along line III-III.
FIG. 4 is a cross-sectional view of a pipe material insert device.
5 is a partial view taken along the line VV in FIG. 4. FIG.
[Explanation of symbols]
10 ... Hollow molded product made of synthetic resin (molded product made of synthetic resin)
DESCRIPTION OF SYMBOLS 11 ... Recessed space 12 ... Notch step part 31 ... Mold for blow molding (mold)
33 ... Forming surface 35 ... Pipe material support piece 36 ... Pipe material support piece 37 ... Step portion forming protrusion 38 ... Step portion forming protrusion P ... Pipe material

Claims (4)

樹脂成形品にパイプ材をインサート成形した樹脂成形品におけるパイプ材インサート構造において、前記樹脂成形品における前記パイプ材の両端に凹部空間を設け、この凹部空間に前記パイプ材の端縁を開放したことを特徴とする樹脂成形品におけるパイプ材インサート構造。In a pipe material insert structure in a resin molded product in which a pipe material is insert-molded in a resin molded product, a recessed space is provided at both ends of the pipe material in the resin molded product, and an edge of the pipe material is opened in the recessed space. Pipe material insert structure in resin molded products characterized by 請求項１の樹脂成形品におけるパイプ材インサート構造において、前記パイプ材の一部側面を前記樹脂成形品の外壁面から露出させるとともにこの外壁面における前記パイプ材の接触縁に切り欠き段部を形成したことを特徴とする樹脂成形品におけるパイプ材インサート構造。2. The pipe material insert structure in a resin molded product according to claim 1, wherein a part of the side surface of the pipe material is exposed from the outer wall surface of the resin molded product, and a notch step is formed at a contact edge of the pipe material on the outer wall surface. A pipe material insert structure in a resin molded product characterized by the above. 成形型の成形面に所定間隔を介してパイプ材支持片を突出させ、この一対の支持片の間にインサート用パイプ材をその両端から支持可能としたことを特徴とする樹脂成形品におけるパイプ材インサート装置。A pipe material in a resin molded product characterized in that a pipe material support piece protrudes from a molding surface of a molding die at a predetermined interval, and an insert pipe material can be supported from both ends between the pair of support pieces. Insert device. 請求項３の樹脂成形品におけるパイプ材インサート装置において、前記成形型の成形面における前記一対の支持片の間に一対の段部形成凸条を所定間隔を介して設けたことを特徴とする樹脂成形品におけるパイプ材インサート装置。4. The pipe material insert device in a resin molded product according to claim 3, wherein a pair of step forming ridges are provided between the pair of support pieces on the molding surface of the mold at a predetermined interval. Pipe material insert device for molded products.
JP2003185983A 2003-06-27 2003-06-27 Pipe material insert structure in resin molded article and pipe material insert equipment therefor Pending JP2005014541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003185983A JP2005014541A (en) 2003-06-27 2003-06-27 Pipe material insert structure in resin molded article and pipe material insert equipment therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003185983A JP2005014541A (en) 2003-06-27 2003-06-27 Pipe material insert structure in resin molded article and pipe material insert equipment therefor

Publications (1)

Publication Number Publication Date
JP2005014541A true JP2005014541A (en) 2005-01-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018176642A (en) * 2017-04-19 2018-11-15 キョーラク株式会社 Structure
US10493677B2 (en) * 2014-11-21 2019-12-03 Solvay Specialty Polymers Usa, Llc Overmolded inserts and methods for forming the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10493677B2 (en) * 2014-11-21 2019-12-03 Solvay Specialty Polymers Usa, Llc Overmolded inserts and methods for forming the same
JP2018176642A (en) * 2017-04-19 2018-11-15 キョーラク株式会社 Structure
JP6989753B2 (en) 2017-04-19 2022-01-12 キョーラク株式会社 Structure

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