JPH064269B2 - Manufacturing method of blow molded products with structural rigidity - Google Patents

Manufacturing method of blow molded products with structural rigidity

Info

Publication number
JPH064269B2
JPH064269B2 JP62199937A JP19993787A JPH064269B2 JP H064269 B2 JPH064269 B2 JP H064269B2 JP 62199937 A JP62199937 A JP 62199937A JP 19993787 A JP19993787 A JP 19993787A JP H064269 B2 JPH064269 B2 JP H064269B2
Authority
JP
Japan
Prior art keywords
resin
structural rigidity
blow molding
manufacturing
blow molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP62199937A
Other languages
Japanese (ja)
Other versions
JPS6444725A (en
Inventor
日吉 岡本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SABIC Innovative Plastics Japan KK
Original Assignee
GE Plastics Japan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GE Plastics Japan Ltd filed Critical GE Plastics Japan Ltd
Priority to JP62199937A priority Critical patent/JPH064269B2/en
Publication of JPS6444725A publication Critical patent/JPS6444725A/en
Publication of JPH064269B2 publication Critical patent/JPH064269B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30221—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being point-like
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular 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
    • 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
    • B29C66/73—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
    • B29C66/73921—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 characterised by the materials of both parts being thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、吹込み成形品の製造法に関する。TECHNICAL FIELD The present invention relates to a method for producing a blow molded product.

〔従来の技術〕[Conventional technology]

従来、吹込み成形は一般に汎用樹脂による容器の製造に
おいて行われてきた。洗剤、食品、化粧品などの容器が
その例である。Conventionally, blow molding has generally been performed in the production of containers made of general-purpose resins. Examples are containers for detergents, foods, cosmetics and the like.

近年、エンジニヤリングプラスチックと呼ばれる高機能
樹脂を吹込み成形して機械的構造体を作ることが行われ
るようになった。確かに吹込み成形により簡便に機械的
構造体が得られるが、エンジニヤリングプラスチックを
用いたとはいえ吹込み成形品の構造体としての強度は低
かった。In recent years, a mechanical structure has been made by blow molding a high-performance resin called engineering plastic. Certainly, a mechanical structure can be easily obtained by blow molding, but the strength of the blow molded product as a structure was low even though engineering plastics were used.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

本発明は、吹込み成形により機械的構造体を作る場合に
おいて、高強度であり、かつ強度のバラつきのない成形
品を得ることを目的とする。An object of the present invention is to obtain a molded product which has high strength and does not vary in strength when a mechanical structure is produced by blow molding.

〔課題を解決するための手段〕[Means for Solving the Problems]

本発明は、構造剛性を持つ構造体を熱可塑性樹脂の吹込
み成形により作る方法において、該構造体の少くとも一
部において一つのキャビティ側表面と他のキャビティ側
表面が接合した状態に吹込み成形し、ついで該接合する
個所の外側表面形状と略同じ形状のホーンを有する超音
波溶着機により該接合する個所の樹脂を溶融溶着させる
方法である。The present invention relates to a method for producing a structure having structural rigidity by blow molding of a thermoplastic resin, in which at least a part of the structure has one cavity side surface and another cavity side surface joined together. This is a method of molding and then melting and welding the resin at the joining point with an ultrasonic welding machine having a horn having substantially the same shape as the outer surface shape of the joining point.

本発明において、成形品の構造剛性を要求される個所で
は樹脂の二つの壁を近接密着させるように構造体を設計
する。吹込み成形においてパリソンを形成した後に型を
締めてエアーを吹込むのであるが、本発明においては上
記構造剛性を要求される個所ではこの型の壁がキャビテ
ィ側に陥入して二つの壁が接近している。従って、型を
締めたときに、樹脂の一表面及びこれに対向する他の一
表面とが互に押圧される。ところが問題なのは、吹込み
成形においてはパリソンはそれ程高温でなく、また型締
圧力、吹込圧力もさして高くない。従って、上記の押圧
された樹脂間の接着がしばしば不十分となり、強度がバ
ラつく事が判った。In the present invention, the structure is designed such that the two walls of the resin are brought into close contact with each other at a location where structural rigidity of the molded product is required. In blow molding, after forming the parison, the mold is tightened and air is blown, but in the present invention, the wall of this mold is depressed into the cavity side at the location where the above structural rigidity is required, and two walls are formed. Approaching Therefore, when the mold is clamped, one surface of the resin and the other surface opposite thereto are pressed against each other. However, the problem is that the parison is not so high in blow molding, and the mold clamping pressure and the blow pressure are not so high. Therefore, it was found that the above-mentioned adhesion between the pressed resins is often insufficient and the strength varies.

射出成形においては、成形品の穴の個所ではピンの両側
面から樹脂が回り込んで合流し（ウェルドまたはニット
ラインと呼ばれる）、この個所で樹脂が完全に一体化し
て接着し、高強度になる。これは、射出成形において
は、樹脂は高温であり、かつ高圧力下で射出されるの
で、接着しやすいからである。ところが、吹込み成形に
おいては温度、圧力とも低い。In injection molding, at the hole of the molded product, the resin wraps around from both sides of the pin and merges (called weld or knit line), and the resin is completely integrated and bonded at this point, resulting in high strength. . This is because in injection molding, the resin is at a high temperature and is injected under a high pressure, so that the resin is easily bonded. However, in blow molding, both temperature and pressure are low.

そこで本発明では、上記のように吹込成形において接合
された個所を、この個所の外側（成形型側）表面形状と
略同じ形状のホーンを有する超音波溶着機により溶着さ
せるのである。以上を、図面を参照しながら更に説明す
る。Therefore, in the present invention, the portion joined in the blow molding as described above is welded by an ultrasonic welding machine having a horn having substantially the same shape as the outer surface (molding die side) surface shape of this portion. The above will be further described with reference to the drawings.

第１ａ図は、本発明により作られた吹込み成形構造体を
切断したものの見取り図であり、第１ｂ図はその平面図
である。図中の１は、樹脂を押し出してパリソンを先ず
形成してから型内で吹込み成形した樹脂壁を示す。図中
の２は、構造剛性を増すために、二つの樹脂壁が近接さ
れる個所である。すなわち、この個所で樹脂の一つのキ
ャビティ側表面ともう一つのキャビティ側表面が接近
し、かつ第１ａ図及び第１ｂ図で３として示すように所
々で接合する。次に、第１ａ図における吹込み成形体の
この個所の凹みと同じ寸法の突起を有するホーンを用い
て超音波溶着機により３の個所を完全に溶融溶着させ
る。FIG. 1a is a cutaway view of a blow molded structure made in accordance with the present invention and FIG. 1b is a plan view thereof. Reference numeral 1 in the figure denotes a resin wall obtained by extruding a resin to first form a parison and then blow molding it in a mold. In the figure, 2 is a portion where the two resin walls are close to each other in order to increase the structural rigidity. That is, at this point, one cavity side surface of the resin approaches the other cavity side surface, and they are joined in places as indicated by 3 in FIGS. 1a and 1b. Next, the three parts are completely melt-welded by an ultrasonic welding machine using a horn having a protrusion having the same size as the depression of this part of the blow-molded body in FIG. 1a.

第２ａ図は、本発明により作られた別の吹込み成形構造
体を切断したものの見取り図であり、第２ｂ図はその平
面図である。図中の１は、型内のパリソンにエアーを吹
込んで成形した樹脂の壁であり、２は広い面積において
樹脂の二つの壁が接合されている個所を示す。本発明に
伴い、２の個所と同じ形状をしたホーンを有する超音波
溶着機により、この個所が溶融溶着される。2a is a cutaway view of another blow molded structure made in accordance with the present invention, and FIG. 2b is a plan view thereof. In the figure, 1 is a resin wall formed by blowing air into a parison in the mold, and 2 is a portion where two resin walls are joined in a wide area. According to the present invention, this portion is melt-welded by an ultrasonic welding machine having a horn having the same shape as the two portions.

本発明方法は、特に融点が高く、接着性の乏しい樹脂の
吹込み成形に好ましく実施される。そのような樹脂の例
は、ポリ（２，６−ジメチル−１．４−フェニレン）エ
ーテルなどのポリエーテル、ポリカーボネートなどであ
る。これらの樹脂は、元来機械的特性に優れているが、
これから単に従来の吹込み成形法によって機械的構造体
を作ろうとすると、上記の樹脂間の接着がしばしば弱
く、強度的欠陥が生じる。超音波溶着でこの欠点を解消
することにより、このような樹脂の機械的構造体を簡便
に作ることが可能になった。The method of the present invention is preferably carried out for blow molding of a resin having a particularly high melting point and poor adhesion. Examples of such resins are polyethers such as poly (2,6-dimethyl-1.4-phenylene) ether, polycarbonates and the like. These resins are originally excellent in mechanical properties,
If a mechanical structure is simply produced by a conventional blow molding method, the adhesion between the above resins is often weak and a strength defect occurs. By eliminating this drawback by ultrasonic welding, it has become possible to easily make such a mechanical structure of resin.

超音波溶着の条件自体は、樹脂の種類、成形品形状など
によって適宜決めることができる。上記のポリ（２．６
−ジメチル−１．４−フェニレル）エーテルの場合、た
とえば900Ｗ、20ＫHZの溶着機を用いて加圧力20psiで0.
5秒の保持時間で一般に十分である。The conditions for ultrasonic welding itself can be appropriately determined depending on the type of resin, the shape of the molded product, and the like. Poly (2.6 above)
In the case of (dimethyl-1.4-phenylyl) ether, for example, a 900 W, 20 KHZ welder is used and a pressure of 20 psi is applied to a pressure of 20 psi.
A retention time of 5 seconds is generally sufficient.

上記のように本発明によって、構造剛性を持つ構造体を
吹込み成形により簡便に作ることができるようになっ
た。As described above, according to the present invention, a structure having structural rigidity can be easily manufactured by blow molding.

【図面の簡単な説明】[Brief description of drawings]

第１ａ図及び第２ａ図は、各々本発明に従い作られた成
形品を切断したものの見取図であり、第１ｂ図及び第２
ｂ図は、各々対応する平面図である。図中の１は吹込み
成形された樹脂の壁、２は構造剛性のために二つの樹脂
の壁が接合された個所を示す。FIGS. 1a and 2a are sketch drawings of a molded product made in accordance with the present invention, respectively, and FIGS. 1b and 2a.
FIG. b is a plan view corresponding to each. In the figure, 1 is a blow-molded resin wall, and 2 is a portion where two resin walls are joined for structural rigidity.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】構造剛性を持つ構造体を熱可塑性樹脂の吹
込み成形により作る方法において、該構造体の少くとも
一部において一つのキャビティ側表面と他のキャビティ
側表面が接合した状態に吹込み成形し、ついで該接合す
る個所の外側表面形状と略同じ形状のホーンを有する超
音波溶着機により該接合する個所の樹脂を溶融溶着させ
る方法。1. A method for producing a structure having structural rigidity by blow molding of a thermoplastic resin, wherein at least a part of the structure is blown with one cavity side surface and another cavity side surface joined together. A method in which the resin at the joining point is melt-welded by an ultrasonic welding machine having a horn having substantially the same shape as the outer surface shape of the joining point. 【請求項２】熱可塑性樹脂がポリエーテル又はその混合
物である特許請求の範囲第１項記載の方法。2. The method according to claim 1, wherein the thermoplastic resin is a polyether or a mixture thereof.
JP62199937A 1987-08-12 1987-08-12 Manufacturing method of blow molded products with structural rigidity Expired - Lifetime JPH064269B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62199937A JPH064269B2 (en) 1987-08-12 1987-08-12 Manufacturing method of blow molded products with structural rigidity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62199937A JPH064269B2 (en) 1987-08-12 1987-08-12 Manufacturing method of blow molded products with structural rigidity

Publications (2)

Publication Number Publication Date
JPS6444725A JPS6444725A (en) 1989-02-17
JPH064269B2 true JPH064269B2 (en) 1994-01-19

Family

ID=16416075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62199937A Expired - Lifetime JPH064269B2 (en) 1987-08-12 1987-08-12 Manufacturing method of blow molded products with structural rigidity

Country Status (1)

Country Link
JP (1) JPH064269B2 (en)

Also Published As

Publication number Publication date
JPS6444725A (en) 1989-02-17

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