JP2021098324A - Mold and molding method - Google Patents

Mold and molding method Download PDF

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JP2021098324A
JP2021098324A JP2019231645A JP2019231645A JP2021098324A JP 2021098324 A JP2021098324 A JP 2021098324A JP 2019231645 A JP2019231645 A JP 2019231645A JP 2019231645 A JP2019231645 A JP 2019231645A JP 2021098324 A JP2021098324 A JP 2021098324A
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mold
built
component
molten resin
resin sheet
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JP7421073B2 (en
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洋介 林
Yosuke Hayashi
洋介 林
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Kyoraku Co Ltd
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  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

To provide a mold for molding and a molding method capable of precisely mounting a built-in component.SOLUTION: A second mold 82 of a mold 80 is provided with a holding projection 800 on which a built-in component mounted on a molded article formed by welding a first molten resin sheet 11 and a second molten resin sheet 12 is placed and held at the time of molding.SELECTED DRAWING: Figure 2

Description

本発明は、成形用の金型及び成形方法に関する。 The present invention relates to a molding die and a molding method.

従来から、成形体に内蔵して取り付ける内蔵部品を、成形体の成形時に取り付けるための金型装置が開示されている。例えば、特許文献１に開示されるブロー成形品は、製品の内部空間に内蔵部品が取り付けられる。このブロー成形品の成形は、プリブローにより膨らませたパリソン内に内蔵部品を保持した内蔵部品保持棒を挿入し、スライドコアにより内蔵部品を保持する。その後、内蔵部品保持棒のみを下げて抜き出して型締すると、樹脂材料に内蔵部品が溶着されて、内蔵部品が取り付けられたブロー成形品が成形される。 Conventionally, a mold device for attaching an internal component to be incorporated and attached to a molded body at the time of molding the molded body has been disclosed. For example, in the blow-molded product disclosed in Patent Document 1, an internal component is attached to the internal space of the product. In the molding of this blow-molded product, the built-in part holding rod holding the built-in part is inserted into the parison inflated by the pre-blow, and the built-in part is held by the slide core. After that, when only the built-in component holding rod is lowered, pulled out, and molded, the built-in component is welded to the resin material, and a blow-molded product to which the built-in component is attached is formed.

特開２０１６−１１２７３０号Japanese Unexamined Patent Publication No. 2016-112730

内蔵部品保持棒は、プリブローしたパリソン内に挿入するため、パリソンと干渉することがあり、従って太く形成することが難しい。一方、細く形成した内蔵部品保持棒は、内蔵部品挿入のブレや内蔵部品の位置ズレが起こる場合があり、この場合にはスライドコアによる内蔵部品の所定箇所への突き当てがズレる等して、精度よく内蔵部品を取り付けることができないことがある。 Since the built-in component holding rod is inserted into the pre-blowed parison, it may interfere with the parison and is therefore difficult to form thick. On the other hand, the thinly formed built-in component holding rod may cause the insertion of the built-in component to be shaken or the position of the built-in component to be displaced. It may not be possible to install built-in parts accurately.

本発明は、精度良く内蔵部品を取り付けることができる金型及び成形方法を提供することを目的とする。 An object of the present invention is to provide a mold and a molding method capable of mounting built-in parts with high accuracy.

本発明の金型は、２枚の溶融樹脂シートを溶着させて形成する成形体に取り付けられる内蔵部品を成形時に載置して保持する保持突起が設けられることを特徴とする。 The mold of the present invention is characterized by being provided with a holding protrusion for mounting and holding an internal component attached to a molded body formed by welding two molten resin sheets at the time of molding.

本発明の成形方法は、内蔵部品を成形時に載置して保持する保持突起を備える金型に溶融樹脂シートを賦形する賦形工程と、前記金型の保持突起に内蔵部品を載置して保持させる内蔵部品保持工程と、を有することを特徴とする。 The molding method of the present invention includes a shaping step of shaping a molten resin sheet on a mold provided with a holding protrusion for placing and holding the built-in part at the time of molding, and placing the built-in part on the holding protrusion of the mold. It is characterized by having a built-in component holding process for holding the parts.

本発明によれば、精度良く内蔵部品を取り付けることができる金型及び成形方法を提供することできる。 According to the present invention, it is possible to provide a mold and a molding method capable of mounting built-in parts with high accuracy.

本発明の実施形態に係る成形方法で成形した成形体を備える製品例（収納ボックス）を示す斜視図である。It is a perspective view which shows the product example (storage box) which comprises the molded body molded by the molding method which concerns on embodiment of this invention. 本発明の実施形態に係る金型を備える樹脂成形装置を示す模式図である。It is a schematic diagram which shows the resin molding apparatus which includes the mold which concerns on embodiment of this invention. 本発明の実施形態に係る第２金型を示す斜視図である。It is a perspective view which shows the 2nd mold which concerns on embodiment of this invention. 本発明の実施形態に係る第２金型の保持突起の周辺を拡大した斜視図である。It is an enlarged perspective view around the holding protrusion of the 2nd mold which concerns on embodiment of this invention. 本発明の実施形態に係る第２金型を示し、図４のＶ−Ｖ断面（第２金型の側面から見た縦断面）を示す図である。It is a figure which shows the 2nd mold which concerns on embodiment of this invention, and shows the VV cross section (vertical cross section seen from the side surface of 2nd mold) of FIG. 本発明の実施形態に係る成形方法を示す模式図であり、（ａ）は内蔵部品を第１金型と第２金型との間に配置した状態を示し、（ｂ）は第２溶融樹脂シートを第２金型に対応して垂下した状態を示す。It is a schematic diagram which shows the molding method which concerns on embodiment of this invention, (a) shows the state which the built-in component is arranged between the 1st mold and the 2nd mold, (b) is the 2nd molten resin. The state in which the sheet is hung corresponding to the second mold is shown. 本発明の実施形態に係る成形方法を示す模式図であり、（ａ）は第２溶融樹脂シートを第２金型に賦形させた状態を示し、（ｂ）は第１溶融樹脂シートを第１金型に対応して垂下すると共に、内蔵部品を第２金型の保持突起に載置させた状態を示す。It is a schematic diagram which shows the molding method which concerns on embodiment of this invention, (a) shows the state which the 2nd molten resin sheet was shaped into the 2nd mold, (b) is the 1st molten resin sheet. It shows a state in which the built-in parts are placed on the holding protrusions of the second mold while hanging corresponding to the first mold. 本発明の実施形態に係る成形方法を示す模式図であり、（ａ）は第１溶融樹脂シートを第１金型に賦形させた状態を示し、（ｂ）は第１金型と第２金型とを型締した状態を示す。It is a schematic diagram which shows the molding method which concerns on embodiment of this invention, (a) shows the state which the 1st molten resin sheet was shaped into the 1st mold, (b) is the 1st mold and the 2nd. Indicates a state in which the mold is molded. 本発明の他の実施形態に係る第２金型を示し、図４のＶ−Ｖ断面に相当する断面（第２金型の側面から見た縦断面）を示す図である。It is a figure which shows the 2nd mold which concerns on other embodiment of this invention, and shows the cross section corresponding to the VV cross section of FIG. 4 (vertical cross section seen from the side surface of 2nd mold).

次に、図に基づいて、本発明の実施形態を説明する。図１に示す収納ボックス１００は、蓋１２０が開閉自在に設けられる。図１の二点鎖線は、蓋１２０が閉じられている状態を示す。蓋１２０には、内蔵部品１３０とされる回動軸が取り付けられている。内蔵部品１３０（回動軸）は、収納ボックス本体１１０の軸受部１１１に回動自在に支持される。詳細は後述するが、蓋１２０は、２枚の溶融樹脂シート（第１溶融樹脂シート１１と第２溶融樹脂シート１２）がパーティングラインＰＬにて溶着して形成される成形体である。内蔵部品１３０は、成形時に第１溶融樹脂シート１１及び第２溶融樹脂シート１２に取り付けられる。蓋１２０は、図２に示す樹脂成形装置６０により製造される。 Next, an embodiment of the present invention will be described with reference to the drawings. The storage box 100 shown in FIG. 1 is provided with a lid 120 that can be opened and closed. The alternate long and short dash line in FIG. 1 indicates a state in which the lid 120 is closed. A rotating shaft, which is a built-in component 130, is attached to the lid 120. The built-in component 130 (rotating shaft) is rotatably supported by the bearing portion 111 of the storage box main body 110. Although details will be described later, the lid 120 is a molded product formed by welding two molten resin sheets (first molten resin sheet 11 and second molten resin sheet 12) on a parting line PL. The built-in component 130 is attached to the first molten resin sheet 11 and the second molten resin sheet 12 at the time of molding. The lid 120 is manufactured by the resin molding apparatus 60 shown in FIG.

樹脂成形装置６０は、対向して配置された２台の樹脂供給装置６１（第１樹脂供給装置６１Ａ、第２樹脂供給装置６１Ｂ）を有する。第１樹脂供給装置６１Ａ及び第２樹脂供給装置６１Ｂは、それぞれ第１溶融樹脂シート１１及び第２溶融樹脂シート１２を成形する。樹脂供給装置６１の下方には、蓋１２０を成形する金型８０（第１金型８１、第２金型８２）が配置される。なお、図２及び図６〜図８の金型８０は、図３のＶＩ−ＶＩ断面に相当する断面について模式的に示している。 The resin molding device 60 has two resin supply devices 61 (first resin supply device 61A, second resin supply device 61B) arranged so as to face each other. The first resin supply device 61A and the second resin supply device 61B mold the first molten resin sheet 11 and the second molten resin sheet 12, respectively. A mold 80 (first mold 81, second mold 82) for molding the lid 120 is arranged below the resin supply device 61. The mold 80 of FIGS. 2 and 6 to 8 schematically shows a cross section corresponding to the VI-VI cross section of FIG.

樹脂供給装置６１は、樹脂材料の供給口とされるホッパー６５と、油圧モータ６８に接続されて内部に配置されるスクリューによりホッパー６５から供給された材料を溶融、混錬する押出機６６と、を有する。押出機６６は、プランジャ７２を備えるアキュムレータ７０と接続される。溶融、混錬された樹脂材料は、押出機６６によりアキュムレータ７０に送られる。樹脂材料は、アキュムレータ７０で高圧とされてＴダイ７１に送られる。そして、適宜のタイミングでＴダイ７１のダイスリットが開かれて、ローラ７９により送り出された第１溶融樹脂シート１１及び第２溶融樹脂シート１２が形成される。 The resin supply device 61 includes a hopper 65, which is a supply port for the resin material, an extruder 66, which melts and kneads the material supplied from the hopper 65 by a screw connected to the hydraulic motor 68 and arranged inside. Has. The extruder 66 is connected to an accumulator 70 including a plunger 72. The melted and kneaded resin material is sent to the accumulator 70 by the extruder 66. The resin material is subjected to high pressure by the accumulator 70 and sent to the T die 71. Then, the die slit of the T die 71 is opened at an appropriate timing to form the first molten resin sheet 11 and the second molten resin sheet 12 fed by the roller 79.

ここで、第１溶融樹脂シート１１、第２溶融樹脂シート１２の基材樹脂には、エチレン、プロピレン、ブテン、イソプレンペンテン、メチルペンテン等のオレフィン類の単独重合体あるいは共重合体であるポリオレフィン（例えば、ポリプロピレン、高密度ポリエチレン）、アクリロニトリル・ブタジエン・スチレン共重合体、ポリスチレン、高衝撃ポリスチレン（HIPS樹脂）、アクリロニトリル・スチレン共重合体（AS樹脂）等の非晶性樹脂等を用いることができる。 Here, the base resin of the first molten resin sheet 11 and the second molten resin sheet 12 is a polyolefin (polystyrene) which is a homopolymer or copolymer of olefins such as ethylene, propylene, butene, isoprenepentene, and methylpentene. For example, amorphous resins such as polypropylene, high-density polyethylene), acrylonitrile-butadiene-styrene copolymer, polystyrene, high-impact polystyrene (HIPS resin), and acrylonitrile-styrene copolymer (AS resin) can be used. ..

また、衝撃を吸収するため、水素添加スチレン系熱可塑性エラストマとしてスチレン−エチレン・ブチレン−スチレンブロック共重合体、スチレン−エチレン・プロピレン−スチレンブロック共重合体、水添スチレン−ブタジエンゴムおよびその混合物を上記基材樹脂に加えることができる。また、剛性を高めるためのフィラーとして、無機または有機フィラー、補強効果を得る観点から、繊維状のフィラーとして、ガラス繊維、チタン酸カリウムウィスカ、炭素繊維等、又は板状のフィラーとして、タルク、マイカ、モンモリロナイト等、粒状のフィラーとして、炭酸カルシウム等、針状のフィラーとして、マグネシウム等を上記基材樹脂に加えることができる。 In addition, in order to absorb impact, styrene-ethylene / butylene-styrene block copolymer, styrene-ethylene / propylene-styrene block copolymer, hydrogenated styrene-butadiene rubber and a mixture thereof are used as hydrogenated styrene-based thermoplastic elastoma. It can be added to the above base resin. Further, as a filler for increasing rigidity, an inorganic or organic filler, from the viewpoint of obtaining a reinforcing effect, as a fibrous filler, glass fiber, potassium titanate whisker, carbon fiber, etc., or as a plate-shaped filler, talc, mica. , Montmorillonite, etc., as a granular filler, calcium carbonate, etc., as a needle-shaped filler, magnesium, etc. can be added to the base resin.

第１金型８１及び第２金型８２は、各キャビティ８１ａ，８２ａが対向するよう配置される。各キャビティ８１ａ，８２ａは、製品（蓋１２０）の形状に合わせて略矩形状に形成される。本実施形態においては、収納ボックス１００の前後方向（図１参照）がキャビティ８１ａ，８２ａの垂直方向となるよう第１金型８１、第２金型８２が配置される。第１金型８１の凹状のキャビティ８１ａの外周には、ピンチオフ部８１ｂが環状に形成される。同様に、第２金型８２の凹状のキャビティ８２ａの外周には、ピンチオフ部８２ｂが形成される。第１金型８１及び第２金型８２の外周には、環状に形成される型枠８３，８４が設けられる。第１金型８１には、第１溶融樹脂シート１１と、型枠８３と、キャビティ８１ａとで囲われた空間を減圧する真空ポンプ（不図示）が設けられる。同様に、第２金型８２には、第２溶融樹脂シート１２と、型枠８３と、キャビティ８２ａとで囲われた空間を減圧する真空ポンプ（不図示）が設けられる。 The first mold 81 and the second mold 82 are arranged so that the cavities 81a and 82a face each other. The cavities 81a and 82a are formed in a substantially rectangular shape according to the shape of the product (lid 120). In the present embodiment, the first mold 81 and the second mold 82 are arranged so that the front-rear direction (see FIG. 1) of the storage box 100 is the vertical direction of the cavities 81a and 82a. A pinch-off portion 81b is formed in an annular shape on the outer periphery of the concave cavity 81a of the first mold 81. Similarly, a pinch-off portion 82b is formed on the outer periphery of the concave cavity 82a of the second mold 82. Formwork 83, 84 formed in an annular shape is provided on the outer periphery of the first mold 81 and the second mold 82. The first mold 81 is provided with a vacuum pump (not shown) for reducing the pressure in the space surrounded by the first molten resin sheet 11, the mold 83, and the cavity 81a. Similarly, the second mold 82 is provided with a vacuum pump (not shown) for reducing the pressure in the space surrounded by the second molten resin sheet 12, the mold 83, and the cavity 82a.

図３は、第２金型８２をキャビティ８２ａ側から見た斜視図である。キャビティ８２ａの外周には、ピンチオフ部８２ｂが薄板環状に形成される。ピンチオフ部８２ｂの外側の略環状の面である外周部８２ｃの垂直方向の上方左右２か所には、それぞれクサビ状の保持突起８００が設けられる。すなわち、保持突起８００は、ピンチオフ部８２ｂより外側に位置する。一方、成形体は、ピンチオフ部８２ｂより内側のキャビティ８２ａ内で形成される。すなわち、保持突起８００は、製品に影響ない場所に位置される。そして、保持突起８００は、ピンチオフ部８２ｂと離間して配置される。換言すれば、保持突起８００は、ピンチオフ部８２ｂとは連続しておらず、隙間を有している。 FIG. 3 is a perspective view of the second mold 82 as viewed from the cavity 82a side. A pinch-off portion 82b is formed in an annular shape on the outer periphery of the cavity 82a. Wedge-shaped holding protrusions 800 are provided at two positions on the upper left and right in the vertical direction of the outer peripheral portion 82c, which is a substantially annular surface on the outer side of the pinch-off portion 82b. That is, the holding protrusion 800 is located outside the pinch-off portion 82b. On the other hand, the molded body is formed in the cavity 82a inside the pinch-off portion 82b. That is, the holding protrusion 800 is located at a position that does not affect the product. Then, the holding protrusion 800 is arranged apart from the pinch-off portion 82b. In other words, the holding protrusion 800 is not continuous with the pinch-off portion 82b and has a gap.

ここで図３は、保持突起８００で保持される回動軸とされる内蔵部品１３０が二点鎖線で示される。詳細は後述するが、内蔵部品１３０は、第２金型８２に第２溶融樹脂シート１２を賦形した後、保持突起８００に内蔵部品１３０を載置して保持し、その後型締が行われる。これにより、内蔵部品１３０は、第２溶融樹脂シート１２及び第１溶融樹脂シート１１に取り付けられる。ここで、内蔵部品１３０の側面視略中央（中心Ｏを通る垂直面）で、第１溶融樹脂シート１１及び第２溶融樹脂シート１２が溶着している。なお、内蔵部品１３０は、鉄系の金属製の円柱形状の部品である。そして、内蔵部品１３０の外周面は、ピンチオフ部８２ｂの周辺のみで第１溶融樹脂シート１１及び第２溶融樹脂シート１２と接触している。 Here, in FIG. 3, the built-in component 130, which is a rotation shaft held by the holding protrusion 800, is shown by a two-dot chain line. Although the details will be described later, in the built-in component 130, after shaping the second molten resin sheet 12 on the second mold 82, the built-in component 130 is placed and held on the holding protrusion 800, and then the mold is clamped. .. As a result, the built-in component 130 is attached to the second molten resin sheet 12 and the first molten resin sheet 11. Here, the first molten resin sheet 11 and the second molten resin sheet 12 are welded at the substantially center of the side view of the built-in component 130 (the vertical surface passing through the center O). The built-in component 130 is an iron-based metal cylindrical component. The outer peripheral surface of the built-in component 130 is in contact with the first molten resin sheet 11 and the second molten resin sheet 12 only around the pinch-off portion 82b.

図４は、図３における右側の保持突起８００付近の拡大斜視図である。また、図５は、第２金型８２を側方から見たときの縦断面（図４のＶ−Ｖ断面）を示す。保持突起８００は、上方に向けて拡開するクサビ状に形成され、上面部は内蔵部品１３０の外周に倣った形状であって、内蔵部品１３０の径よりも大きい径で形成される曲面状の載置部８０１が形成される。載置部８０１に対応する外周部８２ｃには、曲面状の凹部８２ｃ１が形成される。凹部８２ｃ１は、載置部８０１と略同径の曲面にて形成される。そして、載置部８０１の外周部８２ｃ側の曲面の端縁８０１ａは、凹部８２ｃ１の端縁８２ｃ１１と略連続する。そして、載置部８０１の曲面の外側は上方に延びるように形成される。この上方に延びた端縁８０１ｂは、側面視において、凹部８２ｃ１の中心Ｏを通る水平面よりも若干下方に位置される。これにより、第２溶融樹脂シート１２を介して内蔵部品１３０を載置部８０１に載置しても、成形中における内蔵部品１３０の脱落を低減することができる。 FIG. 4 is an enlarged perspective view of the vicinity of the holding protrusion 800 on the right side in FIG. Further, FIG. 5 shows a vertical cross section (VV cross section of FIG. 4) when the second mold 82 is viewed from the side. The holding protrusion 800 is formed in a wedge shape that expands upward, and the upper surface portion has a shape that follows the outer circumference of the built-in component 130 and has a curved surface shape that is formed with a diameter larger than the diameter of the built-in component 130. The mounting portion 801 is formed. A curved concave portion 82c1 is formed in the outer peripheral portion 82c corresponding to the mounting portion 801. The recess 82c1 is formed by a curved surface having substantially the same diameter as the mounting portion 801. The curved surface edge 801a on the outer peripheral portion 82c side of the mounting portion 801 is substantially continuous with the edge edge 82c11 of the recess 82c1. Then, the outside of the curved surface of the mounting portion 801 is formed so as to extend upward. The upwardly extending edge 801b is located slightly below the horizontal plane passing through the center O of the recess 82c1 in a side view. As a result, even if the built-in component 130 is placed on the mounting portion 801 via the second molten resin sheet 12, it is possible to reduce the dropout of the built-in component 130 during molding.

一方、第１金型８１には、図２、図６〜図８に模式的に示すように、保持突起８００に対応する、ピンチオフ部８１ｂの外側外周の外周部８１ｃに保持突起挿入凹部８１０が形成される。ここで、保持突起挿入凹部８１０は、保持突起８００と外周部８１ｃとの干渉が回避されていればよい。従って、保持突起挿入凹部８１０は、保持突起８００よりも大きく（深く）形成されていればよい。保持突起挿入凹部８１０は、型締時に保持突起８００が挿入される、干渉回避用の穴である。保持突起挿入凹部８１０の上側の外周部８１ｃには、第２金型８２の凹部８２ｃ１と同形状の凹部８１ｃ１が設けられる。凹部８１ｃ１と凹部８２ｃ１は、型締時に内蔵部品１３０を挟み込む位置に配置される。 On the other hand, in the first mold 81, as schematically shown in FIGS. 2 and 6 to 8, a holding protrusion insertion recess 810 is provided in the outer peripheral portion 81c of the outer outer periphery of the pinch-off portion 81b corresponding to the holding protrusion 800. It is formed. Here, the holding protrusion insertion recess 810 may avoid interference between the holding protrusion 800 and the outer peripheral portion 81c. Therefore, the holding protrusion insertion recess 810 may be formed larger (deeper) than the holding protrusion 800. The holding protrusion insertion recess 810 is a hole for avoiding interference into which the holding protrusion 800 is inserted at the time of mold clamping. The outer peripheral portion 81c on the upper side of the holding protrusion insertion recess 810 is provided with a recess 81c1 having the same shape as the recess 82c1 of the second mold 82. The recess 81c1 and the recess 82c1 are arranged at positions where the built-in component 130 is sandwiched during mold clamping.

次に、蓋１２０を、金型８０を備える樹脂成形装置６０で成形する成形方法を説明する。
成形準備工程；まず、図６（ａ）に示すように、第１金型８１及び第２金型８２間に、内蔵部品１３０を配置する。内蔵部品１３０は、図示しないロボットハンド等により保持される。
材料供給工程；次に、図６（ｂ）に示すように、第２溶融樹脂シート１２を第２金型に対応する位置（すなわち、内蔵部品１３０と第２金型８２との間）に垂下して配置させる。 Next, a molding method for molding the lid 120 with the resin molding apparatus 60 provided with the mold 80 will be described.
Molding preparation step: First, as shown in FIG. 6A, the built-in component 130 is arranged between the first mold 81 and the second mold 82. The built-in component 130 is held by a robot hand or the like (not shown).
Material supply step; Next, as shown in FIG. 6B, the second molten resin sheet 12 is hung at a position corresponding to the second mold (that is, between the built-in component 130 and the second mold 82). And place it.

第２溶融樹脂シート１２の賦形工程；次に、型枠８４を第２溶融樹脂シート１２に向けて移動させて第２溶融樹脂シート１２のシート面に当接させる（図６（ｂ））。そして、図７（ａ）に示すように、型枠８４と第２金型８２とを相対的に近づけると共に、第２溶融樹脂シート１２、キャビティ８２ａ、及び型枠８４とで形成される空間内を減圧して、第２溶融樹脂シート１２をキャビティ８２ａに賦形させる。このとき、保持突起８００周りの外周部８２ｃにも第２溶融樹脂シート１２が配置されているが、保持突起８００が第２溶融樹脂シート２１を破って第２溶融樹脂シート２１から保持突起８００を露出させてもよいし、保持突起８００が第２溶融樹脂シート２１により覆われた状態であってもよい。 The shaping step of the second molten resin sheet 12; Next, the mold 84 is moved toward the second molten resin sheet 12 and brought into contact with the sheet surface of the second molten resin sheet 12 (FIG. 6B). .. Then, as shown in FIG. 7A, the mold 84 and the second mold 82 are relatively close to each other, and the space formed by the second molten resin sheet 12, the cavity 82a, and the mold 84 is formed. Is depressurized to shape the second molten resin sheet 12 into the cavity 82a. At this time, the second molten resin sheet 12 is also arranged on the outer peripheral portion 82c around the holding projection 800, but the holding projection 800 breaks the second molten resin sheet 21 and the holding projection 800 is removed from the second molten resin sheet 21. It may be exposed, or the holding protrusion 800 may be covered with the second molten resin sheet 21.

内蔵部品保持工程；次に、図７（ｂ）に示すように、内蔵部品１３０を第２金型８２の保持突起８００の載置部８０１に、図示しないロボットハンドを動作させて載置する。より詳細には、内蔵部品１３０は、図７（ａ）の矢印に示すように、水平方向に第２金型８２に接近した後、載置部８０１の上方から垂直に下降して載置部８０１に載置されて、ロボットハンドから解放される。載置後の内蔵部品１３０は、ロボットハンド等で保持されることは無く、内蔵部品１３０の自重と、曲面状の載置部８０１を有して端縁８０１ｂが上方に延びる保持突起８００の形態によって第２金型８２に保持される。なお、本工程の動作中に、第１溶融樹脂シート１１を第１金型８１に対応する位置に配置することができる。そして、第１溶融樹脂シート１１の配置に続けて、次の第１溶融樹脂シート１１の賦形工程を行ってもよい。 Built-in component holding step; Next, as shown in FIG. 7B, the built-in component 130 is mounted on the mounting portion 801 of the holding protrusion 800 of the second mold 82 by operating a robot hand (not shown). More specifically, as shown by the arrow in FIG. 7A, the built-in component 130 approaches the second mold 82 in the horizontal direction, and then descends vertically from above the mounting portion 801 to mount the mounting portion. It is placed on the 801 and released from the robot hand. The built-in component 130 after mounting is not held by a robot hand or the like, and has a shape of a holding protrusion 800 having its own weight of the built-in component 130 and a curved mounting portion 801 and having an end edge 801b extending upward. Is held in the second mold 82. During the operation of this step, the first molten resin sheet 11 can be arranged at a position corresponding to the first mold 81. Then, following the arrangement of the first molten resin sheet 11, the next shaping step of the first molten resin sheet 11 may be performed.

第１溶融樹脂シート１１の賦形工程；型枠８３を第１溶融樹脂シート１１に向けて移動させて第１溶融樹脂シート１１のシート面に当接させる（図７（ｂ）参照）。このとき、内蔵部品１３０は、保持突起８００により保持されているので、動いてしまったり脱落してしまったりすることがない。そして、図８（ａ）に示すように、型枠８３と第１金型８１とを相対的に近づけると共に、第１溶融樹脂シート１１、キャビティ８１ａ、及び型枠８３とで形成される空間内を減圧して、第１溶融樹脂シート１１をキャビティ８１ａに賦形させる。 The shaping step of the first molten resin sheet 11; the mold 83 is moved toward the first molten resin sheet 11 and brought into contact with the sheet surface of the first molten resin sheet 11 (see FIG. 7B). At this time, since the built-in component 130 is held by the holding protrusion 800, it does not move or fall off. Then, as shown in FIG. 8A, the mold 83 and the first mold 81 are relatively close to each other, and the space formed by the first molten resin sheet 11, the cavity 81a, and the mold 83 is formed. Is depressurized to shape the first molten resin sheet 11 into the cavity 81a.

型締工程；型締工程では、図８（ｂ）に示すように、第１金型８１と、第２金型８２とを相対的に接近させて、環状のピンチオフ部８１ｂ，８２ｂ同士が当接するまで型締めする。第１溶融樹脂シート１１と第２溶融樹脂シート１２は、ピンチオフ部８１ｂ，８２ｂに沿って互いに溶着される。このとき、内蔵部品１３０は、パーティングライン上で溶融する第１溶融樹脂シート１１及び第２溶融樹脂シート１２と溶着して固定される。 Molding step; In the mold clamping step, as shown in FIG. 8B, the first mold 81 and the second mold 82 are relatively close to each other, and the annular pinch-off portions 81b and 82b are brought into contact with each other. Mold until it touches. The first molten resin sheet 11 and the second molten resin sheet 12 are welded to each other along the pinch-off portions 81b and 82b. At this time, the built-in component 130 is welded and fixed to the first molten resin sheet 11 and the second molten resin sheet 12 that are melted on the parting line.

このようにして、内蔵部品１３０を成形時に保持突起８００に載置する本発明により、溶融樹脂シートとは溶着しない金属製の内蔵部品１３０であっても、容易に２枚の溶融樹脂シートに内蔵部品１３０を取り付けて成形体とすることができる。そして、保持突起８００によれば、位置ズレや成形時の脱落が低減され、溶融樹脂シートへの内蔵部品１３０の取付けを精度良く行うことができる。更に、本実施形態においては、回動軸とされる内蔵部品１３０を樹脂製の本体から、樹脂で被覆されることなく突出しているので、相手部材との取付（例えば、図１の収納ボックス本体１１０の軸受部１１１）を精度よく行うことができる。なお、金型８０から製品を取り出した後には、バリを除去する必要がある。特に、ピンチオフ部８１ｂ，８２ｂの外側の内蔵部品１３０の周囲のバリは取り除く必要がある。 In this way, according to the present invention in which the built-in part 130 is placed on the holding protrusion 800 at the time of molding, even a metal built-in part 130 that is not welded to the molten resin sheet can be easily built in two molten resin sheets. The component 130 can be attached to form a molded product. Further, according to the holding protrusion 800, misalignment and falling off during molding are reduced, and the built-in component 130 can be attached to the molten resin sheet with high accuracy. Further, in the present embodiment, since the built-in component 130 as the rotation shaft protrudes from the resin main body without being covered with the resin, it is attached to the mating member (for example, the storage box main body of FIG. 1). The bearing portion 111) of 110 can be performed with high accuracy. After removing the product from the mold 80, it is necessary to remove burrs. In particular, it is necessary to remove burrs around the built-in component 130 outside the pinch-off portions 81b and 82b.

次に、本発明に係る他の実施形態について図９を用いて説明する。ここで、図９は、図４のＶ−Ｖ断面に相当する断面（第２金型８２の側面視における縦断面）を示す図である。なお、前述の実施形態と同様の部位・部材については同じ符号を用いて、その説明は省略又は簡略化する。本実施形態の保持突起８００Ａは、第２金型８２の外周部８２ｃの内部に形成された収納部８２０に収納可能に形成される。図９の二点鎖線は、保持突起８００Ａがスライドして収納部８２０に収納された状態を示す。 Next, another embodiment according to the present invention will be described with reference to FIG. Here, FIG. 9 is a diagram showing a cross section corresponding to the VV cross section of FIG. 4 (vertical cross section in the side view of the second mold 82). The same reference numerals are used for the same parts / members as in the above-described embodiment, and the description thereof will be omitted or simplified. The holding protrusion 800A of the present embodiment is formed so as to be storable in the storage portion 820 formed inside the outer peripheral portion 82c of the second mold 82. The alternate long and short dash line in FIG. 9 shows a state in which the holding protrusion 800A slides and is stored in the storage portion 820.

保持突起８００Ａのスライド移動は、図示しない適宜のアクチュエータにより行われる。収納可能に形成される保持突起８００Ａによれば、第２溶融樹脂シート１２が第２金型８２に賦形される工程では収納状態とし、第２溶融樹脂シート１２の賦形完了後に突出させることにより、第２溶融樹脂シート１２を突き破って、保持突起８００Ａを露出させることができる。これにより、保持突起８００Ａの載置部８０１に第２溶融樹脂シート１２を介さずに直接内蔵部品１３０を載置することができ、第２溶融樹脂シート１２の厚みの影響を受けないので、内蔵部品１３０が第２溶融樹脂シート１２及び第１溶融樹脂シート１１に取り付けられる位置の精度が向上する。または、保持突起８００Ａの突出時に第２溶融樹脂シート１２を突き破らない場合であっても、保持突起８００Ａの端縁８０１ｂにより、第２溶融樹脂シート１２に切れ目を形成することができる。さらに、成形完了後、製品取出しの際に保持突起８００Ａを収納するようにすれば、保持突起８００Ａ及びその周辺のバリの影響を低減して製品の取出しを容易とすることができる。 The sliding movement of the holding protrusion 800A is performed by an appropriate actuator (not shown). According to the holding protrusion 800A formed so as to be storable, the second molten resin sheet 12 is put into a stored state in the step of being shaped into the second mold 82, and is projected after the shaping of the second molten resin sheet 12 is completed. As a result, the holding projection 800A can be exposed by breaking through the second molten resin sheet 12. As a result, the built-in component 130 can be directly mounted on the mounting portion 801 of the holding protrusion 800A without passing through the second molten resin sheet 12, and is not affected by the thickness of the second molten resin sheet 12, so that the built-in component 130 is built-in. The accuracy of the position where the component 130 is attached to the second molten resin sheet 12 and the first molten resin sheet 11 is improved. Alternatively, even if the second molten resin sheet 12 is not pierced when the holding projection 800A protrudes, a cut can be formed in the second molten resin sheet 12 by the edge 801b of the holding projection 800A. Further, if the holding protrusion 800A is stored when the product is taken out after the molding is completed, the influence of the holding protrusion 800A and the burrs around the holding protrusion 800A can be reduced and the product can be easily taken out.

以上、本発明の実施形態を説明したが、本発明は本実施形態によって限定されることは無く、適宜変更を加えて実施することができる。例えば、本実施形態においては、内蔵部品１３０として回動軸を用いた場合について説明したが、他の部品であってもよい。また、内蔵部品１３０の取付けは、パーティングラインでの取付に限られず、何れか一方の溶融樹脂シートに取り付けるようにしてもよい。また、内蔵部品１３０は、一部が露出する部品だけではなく、部品全体が製品内部に内蔵させることもできるし、複数の部品を組み合わせた部品とすることもできる。例えば、本実施形態のように内蔵部品１３０を回動軸とした場合には、内蔵部品１３０は、回動軸が自身で回転してしまわないように、補助的な部材を回動軸部材に付随させて形成することもできる。 Although the embodiment of the present invention has been described above, the present invention is not limited to the present embodiment and can be carried out with appropriate modifications. For example, in the present embodiment, the case where the rotating shaft is used as the built-in component 130 has been described, but other components may be used. Further, the mounting of the built-in component 130 is not limited to the mounting on the parting line, and the built-in component 130 may be mounted on either one of the molten resin sheets. Further, the built-in component 130 may be a component in which not only a partially exposed component but also the entire component may be incorporated in the product, or a plurality of components may be combined. For example, when the built-in component 130 is used as a rotating shaft as in the present embodiment, the built-in component 130 uses an auxiliary member as a rotating shaft member so that the rotating shaft does not rotate by itself. It can also be formed incidentally.

１１ 第１溶融樹脂シート １２ 第２溶融樹脂シート
２１ 第２溶融樹脂シート ６０ 樹脂成形装置
６１ 樹脂供給装置 ６１Ａ 第１樹脂供給装置
６１Ｂ 第２樹脂供給装置 ６５ ホッパー
６６ 押出機 ６８ 油圧モータ
７０ アキュムレータ ７１ Ｔダイ
７２ プランジャ ７９ ローラ
８０ 金型 ８１ 第１金型
８１ａ キャビティ ８１ｂ ピンチオフ部
８１ｃ 外周部 ８１ｃ１ 凹部
８２ 第２金型 ８２ａ キャビティ
８２ｂ ピンチオフ部 ８２ｃ 外周部
８２ｃ１ 凹部 ８２ｃ１１ 端縁
８３ 型枠 ８４ 型枠
１００ 収納ボックス １１０ 収納ボックス本体
１１１ 軸受部 １２０ 蓋
１３０ 内蔵部品 ８００ 保持突起
８００Ａ 保持突起 ８０１ 載置部
８０１ａ 端縁 ８０１ｂ 端縁
８１０ 保持突起挿入凹部 ８２０ 収納部
ＰＬ パーティングライン 11 1st molten resin sheet 12 2nd molten resin sheet 21 2nd molten resin sheet 60 Resin molding device 61 Resin supply device 61A 1st resin supply device 61B 2nd resin supply device 65 Hopper 66 Extruder 68 Hydraulic motor 70 Accumulator 71 T Die 72 Plunger 79 Roller 80 Mold 81 1st mold 81a Cavity 81b Pinch-off part 81c Outer circumference 81c1 Recess 82 2nd mold 82a Cavity 82b Pinch-off part 82c Outer circumference 82c1 Recess 82c11 Edge edge 83 Mold 84 Mold 100 Storage box 110 Storage box body 111 Bearing part 120 Lid 130 Built-in parts 800 Holding protrusion 800A Holding protrusion 801 Mounting part 801a Edge edge 801b Edge edge 810 Retaining protrusion insertion recess 820 Storage part PL parting line

Claims (6)

２枚の溶融樹脂シートを溶着させて形成する成形体に取り付けられる内蔵部品を成形時に載置して保持する保持突起が設けられることを特徴とする成形用の金型。 A mold for molding, characterized in that a holding protrusion is provided to mount and hold an internal component attached to a molded body formed by welding two molten resin sheets at the time of molding. 前記保持突起には前記内蔵部品が載置される載置部が形成されることを特徴とする請求項１に記載の成形用の金型。 The molding die according to claim 1, wherein a mounting portion on which the built-in component is mounted is formed on the holding protrusion. 前記保持突起は、ピンチオフ部の外側外周の外周部に設けられることを特徴とする請求項１又は請求項２に記載の成形用の金型。 The molding die according to claim 1 or 2, wherein the holding protrusion is provided on the outer peripheral portion of the outer peripheral portion of the pinch-off portion. 前記外周部には、前記載置部に対応して設けられて前記内蔵部品を受ける凹部が形成されることを特徴とする請求項３に記載の成形用の金型。 The molding die according to claim 3, wherein a recess is formed on the outer peripheral portion so as to correspond to the above-described mounting portion and receive the built-in component. 前記保持突起は、前記金型内に収納可能に形成されることを特徴とする請求項１乃至請求項４の何れか記載の成形用の金型。 The molding die according to any one of claims 1 to 4, wherein the holding protrusion is formed so as to be able to be stored in the mold. 内蔵部品を成形時に載置して保持する保持突起を備える金型に溶融樹脂シートを賦形する賦形工程と、
前記金型の保持突起に内蔵部品を載置して保持させる内蔵部品保持工程と、
を有することを特徴とする成形方法。 A shaping process in which a molten resin sheet is shaped into a mold provided with holding protrusions for placing and holding built-in parts during molding.
A built-in component holding process in which the built-in component is placed and held on the holding protrusion of the mold, and
A molding method characterized by having.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59215814A (en) * 1983-05-24 1984-12-05 Matsushita Refrig Co Vacuum forming method
JP2001205692A (en) * 2000-01-31 2001-07-31 Kyoraku Co Ltd Hollow dual wall structure and manufacturing method therefor
JP2014079900A (en) * 2012-10-14 2014-05-08 Kyoraku Co Ltd Made-of-resin sandwich panel and method for manufacturing a made-of-resin sandwich panel
JP2016112730A (en) * 2014-12-12 2016-06-23 株式会社Fts Blow molding method
JP2018187853A (en) * 2017-05-09 2018-11-29 株式会社Fts Blow molding method
JP2019098560A (en) * 2017-11-29 2019-06-24 キョーラク株式会社 Manufacturing method of resin-made panel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59215814A (en) * 1983-05-24 1984-12-05 Matsushita Refrig Co Vacuum forming method
JP2001205692A (en) * 2000-01-31 2001-07-31 Kyoraku Co Ltd Hollow dual wall structure and manufacturing method therefor
JP2014079900A (en) * 2012-10-14 2014-05-08 Kyoraku Co Ltd Made-of-resin sandwich panel and method for manufacturing a made-of-resin sandwich panel
JP2016112730A (en) * 2014-12-12 2016-06-23 株式会社Fts Blow molding method
JP2018187853A (en) * 2017-05-09 2018-11-29 株式会社Fts Blow molding method
JP2019098560A (en) * 2017-11-29 2019-06-24 キョーラク株式会社 Manufacturing method of resin-made panel

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