JPS6277927A - Hollow molded article and its manufacture - Google Patents

Abstract

PURPOSE:To so constituting the titled molded article that a finish processing part such as a cut off part is not on a side part of the molded article and deformation is not generated on the upper part which becomes a design surface side, by a method wherein a part of the side part is formed into a hollow state by an outside base and inside base and the upper part is formed in a nonhollow state by the two bases. CONSTITUTION:A cross section of a hollow molded article 5 is formed into a convex and the hollow molded article is constituted of the about flat upper part 5b and a side part 5a provided in an extended state so that it is expanded diagonally to the lower part from surrounding four sides of the upper part 5b. A base of the hollow molded article 5 is formed of double layer structure constituted of an outside base 2 made of polypropylene resin and an inside base 3 made of polypropylene resin similarly on the inside and the outside of the outside base 2 is covered with the skin 2 made of soft vinyl chloride. The upper part 5b is made into a nonhollow state by joining the outside base 2 and inside base 3 together and both the side parts 5a are in a hollow state without making the outside base 2 into contact with the inside base 3. With this construction, an external appearance or outward appearance is not spoiled and the skin and an outside member are not peeled off by coming into contact with the other substance.

Description

【発明の詳細な説明】 発明の目的 （産業上の利用分野） 本発明は中空成形品およびその製造方法に関し、さらに
詳しくは、側部の一部に中空部を備え、表皮を有するコ
ンソールボックス等の自動車の内装品およびその製造方
法にするものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial Application Field) The present invention relates to a hollow molded product and a method for manufacturing the same, and more specifically to a console box etc. that has a hollow part in a part of the side part and has a skin. The present invention relates to automobile interior parts and methods of manufacturing the same.

〈従来の技術） 従来から中空成形品を製造するには第９図、第１０図に
示すようにダイ５１から合成樹脂のパリソン５２を雄型
５３と雌型５４との間に押出し、第１１図に示すように
パリソン５２と雌型５４との間におかれた表皮６０と前
記パリソン５２とを雄型５３と雌型５４とによって一体
的にして、中空成形品５５を得る方法が知られている。(Prior art) Conventionally, as shown in FIGS. 9 and 10, a synthetic resin parison 52 is extruded from a die 51 between a male die 53 and a female die 54, and a As shown in the figure, a method is known in which a hollow molded product 55 is obtained by integrating the parison 52 and a skin 60 placed between a parison 52 and a female mold 54 using a male mold 53 and a female mold 54. ing.

この方法は表皮を備えた非円形の完全中空成形品を１！
７る方法として優れた方法である。This method produces 1 non-circular, completely hollow molded product with a skin.
This is an excellent method for

ところが、この種の方法においては第１２図に示すよう
に中空成形品５５の周縁端末部５５ａが成形時に雄型５
３と雌型５４によって押し潰されるため、型開きがされ
た後に中空成形品の仕上げ加工するとき押し潰された部
分に刃物を入れて端末５５ｃが切り落とさなければなら
ず、第１３図に示づように中空成形品の側部又は側部の
末端に切断面５７が残っていた。However, in this type of method, as shown in FIG.
3 and the female mold 54, when finishing the hollow molded product after opening the mold, it is necessary to insert a knife into the crushed part and cut off the end 55c, as shown in FIG. A cut surface 57 remained on the side of the hollow molded product or at the end of the side.

（発明が解決しようとする問題点） このように切断面５７が中空成形品５５の側部又は側部
の末端に形成された接合部Ｂを有する中空成形品５５に
は次のような問題がある。(Problems to be Solved by the Invention) The hollow molded product 55 having the joint B in which the cut surface 57 is formed at the side of the hollow molded product 55 or at the end of the side has the following problems. be.

第一に、その中空成形品５５が、例えば、自動車の内装
品であるコンソールボックスとして自動車に組み付けら
れた場合、前記切断面５７が前記成形品５５の側方から
完全に見えなくなるように組み付けることが難しく、そ
のため製品の外観乃ヱは見栄えが悪くなり商品価値が低
下するという問題がある。First, when the hollow molded product 55 is assembled into an automobile as a console box, which is an interior part of the automobile, for example, it must be assembled so that the cut surface 57 is completely invisible from the side of the molded product 55. Therefore, there is a problem that the appearance of the product becomes unsightly and the commercial value decreases.

第二に、意匠面側の上部５５ｄが中空になっている中空
成形品５５では基材が肉薄となり、剛性が低く、寸法安
定性に欠けるという問題である。Second, in the hollow molded product 55 in which the upper portion 55d on the design side is hollow, the base material is thin, has low rigidity, and lacks dimensional stability.

これは次の理由による。前記上部５５ｄの中空部分を形
成している内側基材５８と外ｆｆ１ｌｊｓ材５９との間
には空気が存在するためその空気が断熱材になって互い
に熱が伝わらない。そして冷却手段を内蔵している雄型
５３に接触している内側基材５８は速く冷却されるが、
同じく冷却手段を内蔵している雌型５４に表皮６０を介
して接触している外側基材５９は表皮６０によって冷却
されにくい。This is due to the following reason. Since air exists between the inner base material 58 and the outer ff1ljs material 59 forming the hollow portion of the upper portion 55d, the air acts as a heat insulating material and heat is not transferred to each other. The inner base material 58 that is in contact with the male die 53 that has a built-in cooling means is cooled quickly.
The outer base material 59, which is in contact with the female mold 54, which also has a built-in cooling means, through the skin 60 is difficult to be cooled by the skin 60.

そのため、上部５５ｄ全体の冷却が不均一になり、前記
上部５５ｄが歪んで波をうつのである。Therefore, the entire upper portion 55d is not cooled uniformly, and the upper portion 55d is distorted and waves.

冷却を均一にする一対策として中空成形品５５の冷却時
間を長くすることも考えられるが、それでは成形サイク
ルが長くなり、生産性が低下する。One possible measure to make the cooling uniform is to lengthen the cooling time of the hollow molded product 55, but this would lengthen the molding cycle and reduce productivity.

本第二発明の目的は切断部等の仕上げ加工部分が成形品
の側部になく、意匠面側となる上部の変形がない中空成
形品を提供することにある。The second object of the present invention is to provide a hollow molded product that has no finishing parts such as cutting parts on the sides of the molded product and does not have deformation of the upper part, which is the design side.

本第二発明の目的は外側基材と内側基材の接合部を成形
品の上下方向において成形し、しかも上部の寸法安定性
が良好な中空成形品を得るのに適した中空成形品の製造
方法を提供にすることにある。The second object of the present invention is to manufacture a hollow molded product suitable for forming the joint between an outer base material and an inner base material in the vertical direction of the molded product and having good dimensional stability in the upper part. The way is to provide.

発明の構成 〈問題点を解決するための手段〉 本第二発明は合成樹脂を成形して得られた表皮付ぎ断面
凸型の中空成形品であって、 少なくともその測部の一部が外測基材と内側基材によっ
て中空状に形成されているとともに、上部は前記二つの
基材によって非中空状に形成され、 さらに、前記表皮の先端部が中空成形品の内方に曲げら
れて前記成形品の開口端部の少なくとも一部に仕上げ加
工部が形成されている中空成形品をその構成とする。Structure of the Invention <Means for Solving the Problems> The second invention is a hollow molded product with a skin and a convex cross section obtained by molding a synthetic resin, wherein at least a part of the measuring part is outside. It is formed into a hollow shape by the measuring base material and the inner base material, and the upper part is formed into a non-hollow shape by the two base materials, and further, the tip of the skin is bent inward of the hollow molded product. The hollow molded product has a finishing portion formed on at least a part of the open end of the molded product.

又、本第二発明は雄型と雌型とからなる金型において少
なくとも一方の金型にスライドコアを備え、前記雄型と
前記雌型との間に合成樹脂のパリソンを押出す工程と、 前記パリソンと前記雌型との間に表皮を配設する工程と
、 前記パリソンと前記表皮とを前記二つの型の間で、側部
の少なくとも一部に外側基材と内側基材とからなる中空
部を備え、上部が非中空部の断面凸型の中空成形品を形
成するように、挾んでプレスする工程、 前記スライドコアを前記雄型の凸部側に移動させて外側
基材を前記内側基材側に押し付けながら外側基材と内側
基材との接合部を形成するとともに、前記表皮の端部を
巻き込む工程と、前記スライドコアの先端部と前記凸部
の側面との間で前記表皮と前記接合部を挟み潰す工程と
、型間さして前記二つの型から中空成形品を取り出す工
程と からなる方法をその構成どする。Further, the second invention includes a step of providing a slide core in at least one of the molds consisting of a male mold and a female mold, and extruding a parison of synthetic resin between the male mold and the female mold; arranging a skin between the parison and the female mold; and disposing the parison and the skin between the two molds, at least a portion of the side being comprised of an outer base material and an inner base material. a step of pinching and pressing to form a hollow molded product having a convex cross section with a hollow part and a non-hollow part at the top; moving the slide core to the convex part side of the male mold and moving the outer base material to the convex part of the male mold; forming a joint between the outer base material and the inner base material while pressing against the inner base material side, and rolling up the end of the skin; The method comprises a step of pinching and crushing the skin and the joint portion, and a step of taking out the hollow molded product from the two molds by inserting the mold between the molds.

（作用） 第・発明では外側基材と内側基材によって中空状に構成
されている側部が中空成形品の上下方向の強ＩＦ）を高
める。又、非中空状の上部では外側基材と内側基材との
一体化により従来の中空成形品の基材より厚くなるので
、基材の剛性が上がるとともに冷却が均一となら、上部
の寸法安定性を増大させる。(Function) In the first invention, the side portion formed in a hollow shape by the outer base material and the inner base material increases the strong IF in the vertical direction of the hollow molded product. In addition, the non-hollow upper part is thicker than the base material of conventional hollow molded products due to the integration of the outer base material and the inner base material, so if the rigidity of the base material is increased and cooling is uniform, the dimensional stability of the upper part can be improved. Increase sex.

さらに、外側基材の先端部が中空成形品の内方に曲げら
れており、それとともに表皮の端部が中空成形品の開口
端部に巻き込まれているので、成形品の他の部位、例え
ば、自動車の床に装着した場合、外側基材と内側基材と
の接合部及び表皮の端部が成形品の側部から見えにくい
位置に形成されている。Furthermore, since the tip of the outer base material is bent inward of the hollow molded product, and the end of the skin is wrapped around the open end of the hollow molded product, other parts of the molded product, e.g. When mounted on the floor of an automobile, the joint between the outer base material and the inner base material and the edge of the skin are formed in a position that is difficult to see from the side of the molded product.

第二発明においては型締め時に雄型と雌型によって上部
の非中空部を形成するとともに、表皮と一体化する。又
、スライドコアによって外側基材の先端部となる部分が
前記内側基材側に曲げられ、外側基材と内側基材との接
合部が中空成形品の内方寄りに形成される。さらに、こ
れと同時に表皮の端部を中空成形品の内方寄りに巻き込
み表皮の端末処理も行なわれる。In the second invention, when the mold is clamped, the male mold and the female mold form an upper non-hollow part and are integrated with the skin. Further, the tip portion of the outer base material is bent toward the inner base material by the slide core, and a joint between the outer base material and the inner base material is formed closer to the inside of the hollow molded product. Furthermore, at the same time, the ends of the skin are rolled inward of the hollow molded product to perform end treatment of the skin.

（実施例） 本第−発明を具体化した第一実施例を第１図、第２図に
基づいて説明する。(Embodiment) A first embodiment embodying the present invention will be described based on FIGS. 1 and 2.

第１図に示すようにこの実施例の中空成形品５はその断
面が凸に形成されており、はぼ平らな上部５ｂど、その
上部５ｂの周囲四方から斜め下方に拡がるように延設さ
れている側部５ａとからなっている。As shown in FIG. 1, the hollow molded product 5 of this embodiment has a convex cross section, and has a substantially flat upper part 5b extending diagonally downward from all four sides of the upper part 5b. It consists of a side part 5a that is

又、この中空成形品５はポリプロピレン樹脂製の外側基
材２と、その内側に同じくポリプロピレン樹脂製の内側
基材３の二層構造によって基材が形成されており、前記
外側基材２の外側は軟質塩化ビニル樹脂製の表皮１によ
って被覆されている。Further, this hollow molded product 5 has a base material formed of a two-layer structure of an outer base material 2 made of polypropylene resin and an inner base material 3 also made of polypropylene resin on the inside thereof. is covered with a skin 1 made of soft vinyl chloride resin.

前記中空成形品５の上部５ｂは前記外側基材２と前記内
側基材３とが接合して非中空状になっており、両側部５
ａは前記外側基材２と前記内側基材３とが接触すること
なく中空状になっている。The upper part 5b of the hollow molded product 5 is formed by joining the outer base material 2 and the inner base material 3 to form a non-hollow shape, and both side parts 5
a has a hollow shape without the outer base material 2 and the inner base material 3 coming into contact with each other.

なお、表皮１と外側基材２との闇には、いわゆるウーり
加工が施された合成繊維編物７が設けられ、表皮１はこ
の合成繊維織物７によって接着剤（図示なし）を介さな
くても外側基材２と接合している。これは外側基材２の
外面側の樹脂が合成繊維編物７の織目の中に入り込んで
、いわゆるアンカ作用により合成繊維編物７と接合して
いるからである。In addition, a synthetic fiber knitted fabric 7 subjected to so-called wool processing is provided between the outer skin 1 and the outer base material 2, and the outer skin 1 can be bonded to the outer skin 1 without using an adhesive (not shown). is also joined to the outer base material 2. This is because the resin on the outer surface side of the outer base material 2 enters into the weave of the synthetic fiber knitted fabric 7 and is bonded to the synthetic fiber knitted fabric 7 by a so-called anchoring effect.

さらに、中空成形品５の開口端部５ｃは表皮１とともに
内側基材３の先端部側に曲げられた外側基材２の先端部
によって形成されている。Furthermore, the open end 5c of the hollow molded product 5 is formed by the tip of the outer base material 2 which is bent toward the tip of the inner base material 3 together with the outer skin 1.

そして、外側基材２の端部と内側基材３の端部の接合に
よって形成された接合部Ａは開口端部５ｃにおいて中空
成形品５の内方に寄った位置に形成されている。又、表
皮１の端部も開口端部５ｃの内方に巻き込まれた状態で
接合部Ａの近−に形成されている。A joint A formed by joining the end of the outer base material 2 and the end of the inner base material 3 is formed at a position closer to the inside of the hollow molded product 5 at the open end 5c. Further, the end of the skin 1 is also formed near the joint A in a state where it is rolled up inside the open end 5c.

以上のように構成されるこの実施例の中空成形品５は次
のような作用・効果を発揮する。The hollow molded product 5 of this embodiment configured as described above exhibits the following functions and effects.

外側基材２の端部と内側基材３の端部との接合によって
形成された接合部Ａが中空成形品５の内方に存在するの
で、前記接合部Ａは中空成形品５の側方から見えないか
又は見えにくい。Since the joint A formed by joining the end of the outer base material 2 and the end of the inner base material 3 exists inside the hollow molded product 5, the joint A is located on the side of the hollow molded product 5. invisible or difficult to see.

特に、この実施例の中空成形品５を、例えば、自動車の
コンソールボックスのように上部５ｂを上にし、開口端
部５ｃを下にして自動車のフロアのような比較的低い部
位に取り付けた場合、前記接合部Ａは中空成形品５の上
方又は側方から見えなくなる。従って、製品の外観乃至
は見栄えが損われることがない。Particularly, when the hollow molded product 5 of this embodiment is attached to a relatively low part such as the floor of an automobile, for example, with the upper part 5b facing up and the open end 5c facing down, such as a console box of an automobile, The joint portion A becomes invisible from above or from the side of the hollow molded product 5. Therefore, the appearance or appearance of the product is not impaired.

又、前記表皮１の端部が中空成形品５の内方に巻き込ま
れて中空成形品５自身によって隠されるように前記中空
成形品５を取り付けた場合、表皮１の端部と他の物体と
の接触が回避されるので、前記表皮１の端部と外側基材
２とが剥離することを防止している。In addition, when the hollow molded product 5 is attached so that the end of the skin 1 is rolled up inside the hollow molded product 5 and hidden by the hollow molded product 5 itself, the end of the skin 1 and other objects may not be connected to each other. This prevents the end of the skin 1 and the outer base material 2 from peeling off.

次に、両側部に中空部を備えた中空成形品であるコンソ
ールボックスを製造する方法に具体化した第二発明を第
３〜６図に基づいて説明する。Next, the second invention, which is embodied in a method of manufacturing a console box that is a hollow molded product having hollow parts on both sides, will be explained based on FIGS. 3 to 6.

第３図に示すように押出成形Ｉｌ（図示なし）の下方に
、雄型２１と、同雄型２１の凸部２１ａが十分入り込む
ようなスペースの凹部２３ａを有する雌型２３とが配置
されており、前記雌型２３の型開き而には矢印Ｘ、Ｙ方
向に摺動可能な２個のスライドコア２２が移動可能に設
けられている。なお、スライドコア２２は、例えば、油
圧シリンダ（図示なし）によって前記Ｘ、Ｙ方向に移動
可能になっている。As shown in FIG. 3, a male die 21 and a female die 23 having a recess 23a with a space large enough to accommodate the convex portion 21a of the male die 21 are arranged below the extrusion molding Il (not shown). Two slide cores 22, which are slidable in the directions of arrows X and Y, are movably provided at the opening of the female mold 23. Note that the slide core 22 is movable in the X and Y directions by, for example, a hydraulic cylinder (not shown).

又、前記スライドコア２２から型開き方向にわずかに離
れた位置に軟質ポリ塩化ビニル樹脂製の表皮１が合成繊
維植物７の付着している方を雄型２１の方に向けて配設
されている。Further, a soft polyvinyl chloride resin skin 1 is arranged at a position slightly away from the slide core 22 in the mold opening direction, with the side to which the synthetic fiber plant 7 is attached facing the male mold 21. There is.

このように配置された雄型２１と雌型２３との間に、ま
ず、ポリプロピレン樹脂のパリソン６が押し出される。First, a polypropylene resin parison 6 is extruded between the male mold 21 and female mold 23 arranged in this manner.

次に、第４図に示すように雄型２１と雌型２３を移動さ
せてパリソン６に空気を吹き込みながらパリソン６と表
皮１とをプレスするように型閉めする。すると、パリソ
ン６はそれらの金型２１．２３に潰されて雌型２３側の
樹脂層は変形して中空成形品５の外側基材２になり、雄
型２１側の樹脂層は変形して中空成形品５の内側基材３
になる。Next, as shown in FIG. 4, the male die 21 and the female die 23 are moved to close the parison 6 and the skin 1 while blowing air into the parison 6 so as to press the parison 6 and the skin 1. Then, the parison 6 is crushed by these molds 21 and 23, the resin layer on the female mold 23 side is deformed and becomes the outer base material 2 of the hollow molded product 5, and the resin layer on the male mold 21 side is deformed. Inner base material 3 of hollow molded product 5
become.

そして、外側基材２と内側基材３とは雄型２１の凸部２
１ａの先端面と雌型２３凹部２３ａの内上面との間にお
いて押圧・一体化され、均一肉厚の上部５ｃになるとと
もに、その上部５ｃは冷却手段（図示なし）を内蔵して
いる雄型２１、雌型２３のうち主に雄型２１によって冷
却される。The outer base material 2 and the inner base material 3 are the convex portions 2 of the male die 21.
The top surface of the mold 1a is pressed and integrated with the inner upper surface of the recess 23a of the female mold 23 to form an upper part 5c of uniform thickness, and the upper part 5c is a male mold having a built-in cooling means (not shown). 21, the male mold 21 of the female mold 23 is mainly used for cooling.

他方、雄型２１の凸部２１ａ側面と雌型２３凹部内側面
との間においてはパリソン６が完全に潰されることなく
、外側基材２と内側基材３とからなる二重側基材の中空
部が形成される。なお、この型閉め時に表皮１と外側基
材２とが接合される。On the other hand, between the side surface of the convex portion 21a of the male mold 21 and the inner surface of the recessed portion of the female mold 23, the parison 6 is not completely crushed, and the double side base material consisting of the outer base material 2 and the inner base material 3 is A hollow section is formed. Note that the outer skin 1 and the outer base material 2 are joined at the time of this mold closing.

次に、前記スライドコア２２を雄型２１と雌型２３との
間において第５図に示す位置から第６図に示す位置に移
動させる。すると、スライドコア２２の喫状の先端部２
２ａによって表皮１が接合された外側基材２の側部中間
部が曲げられながら内側基材３に対して押し付【プられ
る。Next, the slide core 22 is moved between the male mold 21 and the female mold 23 from the position shown in FIG. 5 to the position shown in FIG. Then, the curved tip 2 of the slide core 22
The middle part of the side of the outer base material 2 to which the skin 1 is joined by 2a is pressed against the inner base material 3 while being bent.

さらに、スライドコア２２が雄型２１凸部２１ａの方に
強力に押されると、外側基材２、内側基材３Ａｉよび表
皮１の三者がスライドコア２２の先端部２２ａと雄型２
１凸部２１ａの側面との間で圧迫されて前記外側基材２
“と内１１ｉ１１１４材３とが接合・融着して両者の接
合部Ａが形成され、さらに、その接合部Ａは前記先端部
２２ａと前記側面との間に挾み潰されて、その部分の表
皮１、外側基材２及び内側基材３が薄い、いわゆるパリ
状になるか、又は切断される。Further, when the slide core 22 is strongly pushed toward the convex portion 21a of the male mold 21, the outer base material 2, the inner base material 3Ai, and the skin 1 are pressed against the tip 22a of the slide core 22 and the male mold 2.
1 and the side surface of the convex portion 21a, the outer base material 2
" and the inner 11i1114 material 3 are joined and fused to form a joint A between the two, and further, the joint A is pinched between the tip 22a and the side surface, and the part of that part is crushed. The skin 1, the outer substrate 2 and the inner substrate 3 are thinned, so-called crispy, or cut.

そして最後に、型開きして前記二つの型２１．２３の間
から中空成形品５を取り出して前記接合部Ａに付着して
いるパリ状部分を刃物で切断する等して除去づ゛れば第
１図、第２図に示すような形状の中空成形品５になる。Finally, the mold is opened, the hollow molded product 5 is taken out from between the two molds 21 and 23, and the crispy part adhering to the joint A is removed by cutting it with a knife or the like. A hollow molded product 5 having a shape as shown in FIGS. 1 and 2 is obtained.

この中空成形品５ではその両側部５ａが外側基材２と内
側基材３によって一中空状に形成されているとともに、
上部５ｂが非中空状に形成されている。In this hollow molded product 5, both sides 5a are formed into a hollow shape by the outer base material 2 and the inner base material 3, and
The upper part 5b is formed in a non-hollow shape.

又、この中空成形品５においては前記表皮１が接合され
ている外側基材２の先端部が中空成形品５の内方に曲げ
られて前記成形品の開口端部５ｃを構成し、前記外側基
材２の端部と内側基材３の端部との接合・融着によって
形成された接合部Ａは中空成形品５の内方寄りに存在す
る。Further, in this hollow molded product 5, the tip of the outer base material 2 to which the skin 1 is bonded is bent inward of the hollow molded product 5 to constitute an open end 5c of the molded product, and A joint A formed by joining and fusing the end of the base material 2 and the end of the inner base material 3 is located closer to the inside of the hollow molded product 5.

この方法によれば中空成形品５の上部５ｂを基材の二重
構造とし肉厚にすることができるので、寸法安定性のよ
い中空成形品５を得ることができる。又、雄型２１によ
って上部５ｂが直接冷却されるので、成形サイクルを短
縮することができ、ひいては生産コストの低減を図るこ
とができる。According to this method, the upper part 5b of the hollow molded product 5 can be made thick by having a double structure of the base material, so that the hollow molded product 5 with good dimensional stability can be obtained. Further, since the upper part 5b is directly cooled by the male die 21, the molding cycle can be shortened, and production costs can be reduced.

本発明は前記実施例に限定されるこなく、例えば、次の
態様で実施することができる。The present invention is not limited to the embodiments described above, but can be implemented, for example, in the following manner.

（１）中空成形品５の形状は凹状部分を有し、かつ、側
部の少なくとも一部に中空部分があればいかなる形状で
もよい。(1) The hollow molded product 5 may have any shape as long as it has a concave portion and at least a portion of the side portion has a hollow portion.

（２）外側基材２の先端部が中空成形品５の内側の方に
曲げられてできた外側基材２の端部と内側基材３の端部
との接合によって形成された接合部Ａの位置は極力中空
成形品５の内方になるようにするが、その程度はその中
空成形品５の使用態様によって接合部Ａが中空成形品５
の外観乃至は見栄えをａＬ＜損うことがなく、しかも前
記先端部が前述のように曲げられている範囲において変
更することは当然許容される。(2) Joint part A formed by joining the end of the outer base material 2 and the end of the inner base material 3, which are formed by bending the tip of the outer base material 2 toward the inside of the hollow molded product 5 The position of the joint A should be as far inside the hollow molded product 5 as possible, but the extent to which the joint A is located inside the hollow molded product 5 depends on how the hollow molded product 5 is used.
Of course, it is permissible to make changes within the range where the external appearance or appearance of the aL is not impaired and the tip portion is bent as described above.

（３）中空成形品５はその上部５ｂを下にし、開口端面
を上にして取り扱われたり、特定の装置等に取り付けら
れたりすることもできる。(3) The hollow molded product 5 can be handled with its upper part 5b facing down and its open end face facing up, or it can be attached to a specific device or the like.

〈４）開口端部に曲面を形成させようとする場合は第１
２図に示ずように湾曲部２２１）を有するスライドコア
２２を使用して第１３図に示すようにスライドコア２２
を移動させればよい。<4) When trying to form a curved surface at the opening end, the first
Using the slide core 22 having a curved portion 221 as shown in FIG. 2, the slide core 22 as shown in FIG.
All you have to do is move it.

発明の効果 以上、詳述したように第一発明では外側基材２の端部と
内側基材３の端部の接合部を型閉め方向に形成し、かつ
接合部を中空成形品の端部の内方位置に配設したので、
側方から見えず又は見えにくい。Effects of the Invention As detailed above, in the first invention, the joint between the end of the outer base material 2 and the end of the inner base material 3 is formed in the mold closing direction, and the joint is formed at the end of the hollow molded product. Since it was placed in the inner position of
Not visible or difficult to see from the side.

従って、中空成形品の外観乃至は見栄えが損なわれるこ
とがない。又、表皮の端部を中空成形品の開口端部に巻
き込んで接合部近傍に配設したので、表皮の端部が他の
物体と接触して表皮と外側部材とが剥離するようなこと
がない。Therefore, the appearance or appearance of the hollow molded product is not impaired. In addition, since the end of the skin is wrapped around the open end of the hollow molded product and placed near the joint, there is no possibility that the end of the skin will come into contact with another object and the skin and the outer member will separate. do not have.

第二発明においてはスライドコアにより表皮が付いてい
る外側基材の先端部を前記内ｌ１ｌｌＩ基材側に容易に
曲げることができるとともに中空成形品の同口端部に外
側基材と内側基材との型閉め方向での接合部を形成させ
ることができる。さらに、前記スライドコアの移動によ
って表皮の端末部分の巻き込み処理が行なわれ、成形後
の表皮の端末処理が不要又は処理が容易に行なえる。そ
の結果、第一発明の中空成形品が容易かつ安価に得られ
る。In the second invention, the tip of the outer base material with the skin attached can be easily bent toward the inner base material side by the slide core, and the outer base material and the inner base material are connected to the same mouth end of the hollow molded product. It is possible to form a joint with the mold in the mold closing direction. Furthermore, the end portion of the skin is rolled up by the movement of the slide core, and the end of the skin after molding does not need to be processed or can be easily processed. As a result, the hollow molded article of the first invention can be obtained easily and inexpensively.

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

第１〜８図は本発明に係る図面で、第１図は中空成形品
を部分的に破断した斜視図、第２図は第１図にお１ノる
１部分の拡大図、第３図は成形前の成形工程を示す横断
面図、第４図は成形後の同様の横断面図、第５図はスラ
イドコアを移動させる前における第４図中Ｖ部分の拡大
図、第６図はスライドコアを移動ざ「たときの第４図中
Ｖ部分の拡大図、第７図はスライドコアの他の態様を示
す断面図、第８図は同スライドコアを移動させ毎そたと
ころを示す断面図、第９〜１３図は従来技術に係る図面
で、第９図は成形前の成形■稈のｔａ１１７ｉ面図、第
１０図は成形前の成形工程を示す横断面図、第１１図は
成形後の成形工程を示す横断面図、第１２図は第１１図
におけるＸ部分の拡大図、第１３図は成形品の部分拡大
斜視図である。 表皮１、外側基材２、内側基材３、中空成形品５、側部
５ａ、上部５ｂ、パリソン６、雄型２１、凸部２１ａ、
スライドコア２２、先端部２２ａ、雌型２３、接合部ＡFigures 1 to 8 are drawings according to the present invention, where Figure 1 is a partially cutaway perspective view of a hollow molded product, Figure 2 is an enlarged view of a portion of Figure 1, and Figure 3. is a cross-sectional view showing the forming process before molding, FIG. 4 is a similar cross-sectional view after molding, FIG. 5 is an enlarged view of section V in FIG. 4 before moving the slide core, and FIG. An enlarged view of part V in Fig. 4 when the slide core is moved, Fig. 7 is a sectional view showing another aspect of the slide core, and Fig. 8 shows the same slide core as it is moved. Cross-sectional views, Figures 9 to 13 are drawings related to the prior art, Figure 9 is a ta117i side view of the formed culm before forming, Figure 10 is a cross-sectional view showing the forming process before forming, and Figure 11 is a cross-sectional view showing the forming process before forming. FIG. 12 is an enlarged view of the X portion in FIG. 11, and FIG. 13 is a partially enlarged perspective view of the molded product. Skin 1, outer base material 2, inner base material 3, hollow molded product 5, side part 5a, upper part 5b, parison 6, male mold 21, convex part 21a,
Slide core 22, tip 22a, female mold 23, joint A

Claims (1)

【特許請求の範囲】 １、合成樹脂を成形して得られた表皮（１）付き断面凸
型の中空成形品（５）であつて、 少なくともその側部（５ａ）の一部が外側基材（２）と
内側基材（３）によつて中空状に形成されているととも
に、 上部（５ｂ）が前記二つの基材（２、３）によつて非中
空状に形成され、 さらに、前記表皮（１）の先端部が中空成形品（５）の
内方に曲げられて前記成形品の開口端部（５ｃ）の少な
くとも一部に仕上げ加工部が形成されていることを特徴
とする中空成形品。 ２、雄型（２１）と雌型（２３）とからなる金型におい
て、少なくとも一方の金型にスライドコア（２２）を備
え、前記雄型（２１）と前記雌型との間に合成樹脂のパ
リソン（６）を押出す工程前記パリソン（６）と前記雌
型（２３）との間に表皮（１）を配設する工程と、 前記パリソン（６）と前記表皮（１）とを前記二つの型
（２１、２３）の間で、側部（５ａ）の少なくとも一部
に外側基材（２）と内側基材（３）とからなる中空部を
備え、上部（５ｂ）が非中空部の断面凸型の中空成形品
（５）を形成するように、挾んでプレスする工程、 前記スライドコア（２２）を前記雄型（２１）の凸部（
２１ａ）側に移動させて外側基材（２）を前記内側基材
（３）側に押し付けながら外側基材（２）と内側基材（
３）との接合部（Ａ）を形成するとともに、前記表皮（
１）の端部を巻き込む工程と、 前記スライドコア（２２）の先端部（２２ａ）と前記凸
部（２１ａ）の側面との間で前記表皮（１）と前記接合
部（Ａ）を挟み潰す工程と、型開きして前記二つの型（
２１、２３）から中空成形品（５）を取り出す工程と からなることを特徴とする中空成形品の製造方法。[Claims] 1. A hollow molded product (5) with a convex cross section and a skin (1) obtained by molding a synthetic resin, wherein at least a part of the side portion (5a) thereof is an outer base material. (2) and the inner base material (3), and the upper part (5b) is formed in a non-hollow shape by the two base materials (2, 3); A hollow body characterized in that the tip of the skin (1) is bent inward of the hollow molded product (5) to form a finished part on at least a part of the open end (5c) of the molded product. Molding. 2. In a mold consisting of a male mold (21) and a female mold (23), at least one mold is equipped with a slide core (22), and a synthetic resin is provided between the male mold (21) and the female mold. extruding the parison (6); disposing a skin (1) between the parison (6) and the female mold (23); extruding the parison (6) and the skin (1) Between the two molds (21, 23), at least a part of the side part (5a) is provided with a hollow part consisting of an outer base material (2) and an inner base material (3), and the upper part (5b) is non-hollow. A step of sandwiching and pressing the slide core (22) to form a hollow molded product (5) having a convex cross section of the male die (21);
21a) side and pressing the outer base material (2) against the inner base material (3) side, the outer base material (2) and the inner base material (
3), and at the same time forming a joint (A) with the epidermis (
1) the step of rolling up the end portion; and pinching and crushing the skin (1) and the joint portion (A) between the tip portion (22a) of the slide core (22) and the side surface of the convex portion (21a). Steps, opening the mold and forming the above two molds (
21, 23)) A method for producing a hollow molded product, comprising the step of taking out the hollow molded product (5) from the hollow molded product (5).