JP3988082B2 - Synthetic resin molded product and method for producing the same - Google Patents

Synthetic resin molded product and method for producing the same Download PDF

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JP3988082B2
JP3988082B2 JP2004035368A JP2004035368A JP3988082B2 JP 3988082 B2 JP3988082 B2 JP 3988082B2 JP 2004035368 A JP2004035368 A JP 2004035368A JP 2004035368 A JP2004035368 A JP 2004035368A JP 3988082 B2 JP3988082 B2 JP 3988082B2
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synthetic resin
diameter hole
resin sheet
mold
resin molded
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JP2005225050A (en
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浩之 中村
章夫 松田
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Sakaiya Co Ltd
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Sakaiya Co Ltd
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Priority to KR1020040032246A priority patent/KR100620279B1/en
Priority to CNB2004100445213A priority patent/CN100427287C/en
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Priority to HK05108404.8A priority patent/HK1076425A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/14—Fastening of cover or lid to box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/40—Wall-mounted casings; Parts thereof or accessories therefor
    • H02B1/42—Mounting of devices therein
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/12—Distribution boxes; Connection or junction boxes for flush mounting
    • H02G3/121—Distribution boxes; Connection or junction boxes for flush mounting in plain walls
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/36—Installations of cables or lines in walls, floors or ceilings
    • H02G3/38—Installations of cables or lines in walls, floors or ceilings the cables or lines being installed in preestablished conduits or ducts
    • H02G3/381—Installations of cables or lines in walls, floors or ceilings the cables or lines being installed in preestablished conduits or ducts in ceilings

Description

本発明は、自動車の速度計や回転計等の計器板、エアコンにおける制御パネル、時計文字板、家電製品の表示板、オーディオ製品の前面板等に使用される合成樹脂成形品であって、その表面に加飾された合成樹脂シートを有する合成樹脂成形品及びその製造方法に関する。   The present invention is a synthetic resin molded product used for instrument panels such as automobile speedometers and tachometers, control panels in air conditioners, clock dials, display boards for home appliances, front panels for audio products, etc. The present invention relates to a synthetic resin molded article having a synthetic resin sheet decorated on the surface and a method for producing the same.

従来から、上記の製品のように、表面に合成樹脂シートを有する合成樹脂成形品を製造する方法として、射出成形金型の中に、加飾した合成樹脂シートを挿入して溶融樹脂を注入するようにした射出成形法が用いられている。   Conventionally, as a method of manufacturing a synthetic resin molded product having a synthetic resin sheet on its surface as in the above products, a decorated synthetic resin sheet is inserted into an injection mold and molten resin is injected. An injection molding method as described above is used.

このような成形方法の従来例として、特許文献１に記載されたものを説明すると、この文献には、金型内にトリミングした合成樹脂シートを挿入し、型閉め後に、金型間に溶融成形樹脂を射出することによって、表面に合成樹脂シートを有する合成樹脂成形品を得る方法が開示されている。   As a conventional example of such a molding method, what is described in Patent Document 1 will be described. In this document, a trimmed synthetic resin sheet is inserted into a mold, and after mold closing, melt molding is performed between the molds. A method of obtaining a synthetic resin molded article having a synthetic resin sheet on its surface by injecting resin is disclosed.

ところで、この方法においては、ダイレクトゲート（スプルから直接キャビティに連結しているゲート）を有する金型を用いているため、金型内の合成樹脂シートに穴が設けられている場合、型内に注入された溶融樹脂が合成樹脂シートの穴を通過して合成樹脂シートの裏面まで回り込むことになり、製品として成り立たないものとなる。   By the way, in this method, since a mold having a direct gate (a gate directly connected to the cavity from the sprue) is used, when a hole is provided in the synthetic resin sheet in the mold, The injected molten resin passes through the hole in the synthetic resin sheet and wraps around to the back surface of the synthetic resin sheet, so that the product cannot be realized.

また、サイドゲート（キャビティの側面から成形材料を充填するゲート）を有する金型を用いる成形法もあるが、成形品の端面にゲート口をカットした跡が残るため、端面の見栄えを重視する製品には不向きであり、また上記のゲート跡を処理したり、研磨したりする加工に、コストがかかりすぎるという問題がある。さらに、このサイドゲートを用いる方法で、端面の全周に合成樹脂シートを有する成形品を得るのは、製法上、不可能である。   There is also a molding method that uses a mold that has a side gate (a gate that fills the molding material from the side of the cavity), but because the trace of the gate opening remains on the end surface of the molded product, the product emphasizes the appearance of the end surface. In addition, there is a problem that it is too expensive to process or polish the gate trace. Furthermore, it is impossible in terms of manufacturing method to obtain a molded product having a synthetic resin sheet all around the end face by the method using the side gate.

また、トンネルゲート（ランナの末端を金型のパーティングラインより沈めて、キャビティの下部のボスから成形材料を充填する方式のゲート）を有する金型を用いる成形方法としては、特許文献２に記載された方法がある。この文献に記載された成形法は、トンネルゲートの側方に合成樹脂シートを設置するようにしたものであるが、合成樹脂シートに穴が設けられている場合、溶融樹脂を合成樹脂シートの背面に回さないようにするためにスライドコアを用い、これに合成樹脂シートを嵌め込む必要があるため、金型が高価になるという欠点がある。
特開平６−１０６５６２号公報（第１、２頁） 特開平７−２９０４９７号公報（第１、２頁） Further, as a molding method using a mold having a tunnel gate (a gate of a system in which the end of the runner is submerged from a parting line of the mold and a molding material is filled from a boss below the cavity), a molding method described in Patent Document 2 is described. There has been a way. The molding method described in this document is to install a synthetic resin sheet on the side of the tunnel gate, but when the synthetic resin sheet is provided with holes, the molten resin is removed from the back of the synthetic resin sheet. In order to prevent the mold from being rotated, it is necessary to use a slide core and to insert a synthetic resin sheet into the slide core.
JP-A-6-106562 (pages 1 and 2) JP 7-290497 A (first and second pages)

本発明によって得ようとする合成樹脂成形品は、表面及び端面の一部又は全部に合成樹脂シートを有するもので、この合成樹脂シートに形成された穴よりも大径の穴を背面側の合成樹脂成形部に有するものである。   The synthetic resin molded product to be obtained by the present invention has a synthetic resin sheet on a part or all of the surface and end surface, and a hole having a diameter larger than the hole formed in the synthetic resin sheet is synthesized on the back side. It has in the resin molding part.

その具体例としては、自動車の速度計や回転計等の計器板、或いは時計文字板等において、回転針の軸を挿通するために設けられた挿通穴を挙げることができる。特に、バックライティングを可能とした速度計等において、計器板の中央の挿通穴から光漏れが生じると、製品として成り立たないため、表側の合成樹脂シートに設けられる穴を小径にし、その背面側の合成樹脂成形部に設けられる穴をより大径にして、この大径部にシール材を装着することによって、光漏れを防止する必要がある。   Specific examples thereof include an insertion hole provided for inserting the shaft of the rotating hand in an instrument plate such as a speedometer or a tachometer of an automobile, or a clock face plate. In particular, in a speedometer that enables backlighting, if light leaks from the insertion hole in the center of the instrument panel, it does not hold as a product, so the hole provided in the synthetic resin sheet on the front side is made small in diameter, It is necessary to prevent light leakage by increasing the diameter of the hole provided in the synthetic resin molded portion and attaching a sealing material to the large diameter portion.

上記では、特許文献１、２に関する技術と問題点を挙げたが、さらに本発明と関連する従来技術として、小径穴を有する合成樹脂シートと大径穴を有する合成樹脂成形部とを別個に製造しておき、これらを貼り合わせることによって得るようにした製造方法もあるが、一体成形に比べて工程数が増え、コストが高くなるという問題がある。   In the above, the technologies and problems related to Patent Documents 1 and 2 are listed. However, as a related art related to the present invention, a synthetic resin sheet having a small diameter hole and a synthetic resin molded portion having a large diameter hole are separately manufactured. In addition, there is a manufacturing method obtained by bonding them together, but there is a problem that the number of steps is increased and the cost is increased as compared with the integral molding.

さらに、他の問題点として、ゲートが金型の中央付近以外に位置するように構成されたサイドゲートの場合、合成樹脂シートの裏面に溶融樹脂を射出すると、溶融樹脂の注入時の流れと圧力により、合成樹脂シートが流れの方向に不均等に引き延ばされることとなる。この場合、合成樹脂シートは加飾した表面が可動金型に接するように金型に挿入されるが、合成樹脂シートに印刷等を施してあるものは、その絵柄や意匠位置にずれが生じ、その修正を何度も繰り返えさざるを得ないため、コストアップの原因となっていた。   Furthermore, as another problem, in the case of a side gate configured so that the gate is located outside the vicinity of the center of the mold, when the molten resin is injected on the back surface of the synthetic resin sheet, the flow and pressure during the injection of the molten resin As a result, the synthetic resin sheet is stretched unevenly in the flow direction. In this case, the synthetic resin sheet is inserted into the mold so that the decorated surface is in contact with the movable mold, but the one that is printed on the synthetic resin sheet has a shift in its design and design position, The correction had to be repeated many times, which caused a cost increase.

また、他の問題点として、ピンゲートを使用すると、ゲート口処理上、周辺の溶融樹脂の肉厚を薄くするが、薄くすることによって合成樹脂シートにひけが発生し、見栄えが悪くなる。さらに、上記の場合、突出しピンを可動金型に設けると、合成樹脂シートにピン跡がつき外観を損なうため、突出しピンを固定金型に設ける構造となるが、金型が複雑となり、コストアップとなる。   As another problem, when a pin gate is used, the thickness of the peripheral molten resin is reduced in terms of gate opening treatment, but sinking occurs in the synthetic resin sheet and the appearance is deteriorated. In addition, in the above case, if the protruding pin is provided on the movable mold, the pin mark is left on the synthetic resin sheet and the appearance is impaired, so the protruding pin is provided on the fixed mold, but the mold becomes complicated and the cost increases. It becomes.

また、特許文献２に挙げたトンネルゲート方式では合成樹脂シートが垂直状態で側方にあるため、合成樹脂シートの穴より溶融樹脂部の穴が大径である場合は、スライドコアは使用できず製品が得られない。   Further, in the tunnel gate method described in Patent Document 2, since the synthetic resin sheet is on the side in the vertical state, the slide core cannot be used when the hole of the molten resin portion is larger than the hole of the synthetic resin sheet. I can't get the product.

さらにまた、表面に合成樹脂シートが設けられた合成樹脂成形部の端面に一部でも合成樹脂シートが存在しない場合は、バックライティングの際に、周囲から光漏れが生じるという問題もある。   Furthermore, when there is no synthetic resin sheet on the end surface of the synthetic resin molding portion provided with the synthetic resin sheet on the surface, there is a problem that light leaks from the surroundings during backlighting.

本発明は、上記の事情に鑑みてなされたもので、表面及び端面の一部又は全部に合成樹脂シートを有する合成樹脂成形品であって、合成樹脂シートに形成された小径穴の対応位置に大径穴を有する合成樹脂成形品を高精度で得ることができ、その表面に設けられる合成樹脂シートに加飾された絵柄やその他の意匠に不均等なずれが生じることの少ない合成樹脂成形品及びその製造方法を提供することを目的とする。   The present invention has been made in view of the above circumstances, and is a synthetic resin molded product having a synthetic resin sheet on part or all of the surface and the end surface, at a position corresponding to a small-diameter hole formed in the synthetic resin sheet. Synthetic resin molded products with large-diameter holes can be obtained with high accuracy, and there is little uneven shift in the design and other designs decorated on the synthetic resin sheet provided on the surface. And it aims at providing the manufacturing method.

上記の目的を達成するために、本発明における請求項１の合成樹脂成形品の製造方法は、合成樹脂成形部の表面及び端面の一部又は全部に設けられた合成樹脂シートの小径穴よりも大なる大径穴を形成するようにしたバックライティングを可能とする合成樹脂成形品の製造方法において、前記小径穴及び大径穴に回転軸を挿入した状態で、表面をなす合成樹脂シートの小径穴から外部に光漏れが生じないように、合成樹脂成形部の大径穴の内周に光漏れ防止用リングを嵌合するための空間が必要となるため、前記小径穴よりも大なる大径穴が光漏れ防止リングを嵌合するために形成されるようにし、固定金型に設けられたスプルーブッシュの突出部外周に前記合成樹脂シートの小径穴を嵌合した状態で該合成樹脂シートが前記固定金型と可動金型との間に装着されると共に、前記合成樹脂シートの小径穴の周りに位置して該小径穴よりも大なる大径穴形成部が前記可動金型に形成され、該大径穴形成部の周りに形成された所定形状の型内に前記スプルーブッシュに連通された複数のトンネルゲートを介して溶融樹脂を注入することによって前記大径穴が形成されるようにしたことを特徴とする。 In order to achieve the above object, the method for producing a synthetic resin molded product according to claim 1 of the present invention is more effective than a small-diameter hole of a synthetic resin sheet provided on a part or all of the surface and end surface of the synthetic resin molded part. In the method of manufacturing a synthetic resin molded article that enables backlighting so as to form a large-diameter hole, the small-diameter of the synthetic resin sheet that forms the surface in a state where a rotary shaft is inserted into the small-diameter hole and the large-diameter hole. In order to prevent light leakage from the hole to the outside, a space for fitting the light leakage prevention ring is required on the inner periphery of the large-diameter hole of the synthetic resin molded part, so that it is larger than the small-diameter hole. The synthetic resin sheet is formed in such a manner that a diameter hole is formed to fit the light leakage prevention ring and the small diameter hole of the synthetic resin sheet is fitted to the outer periphery of the protruding portion of the sprue bush provided in the fixed mold. Is movable with the fixed mold A large-diameter hole forming portion that is mounted between the mold and positioned around the small-diameter hole of the synthetic resin sheet and is larger than the small-diameter hole is formed in the movable mold, and the large-diameter hole forming portion The large-diameter hole is formed by injecting molten resin through a plurality of tunnel gates communicating with the sprue bushing into a mold having a predetermined shape formed around the mold.

また、請求項２の発明は、請求項１において、前記固定金型側に設けられた前記スプルーブッシュと前記可動金型側に設けられた前記大径穴形成部及び前記複数のトンネルゲートの構造を２箇所以上設けることによって、複数個の合成樹脂成形品を成形することを特徴とする。 The invention of claim 2, in claim 1, wherein the large-diameter hole forming unit and the plurality of tunnel gate provided with the sprue bushing provided in the stationary mold side to said movable mold side structures A plurality of synthetic resin molded products are formed by providing two or more.

また、請求項３の発明は、請求項１又は２において、前記合成樹脂シートが予め賦形されていることを特徴とする。 The invention of claim 3 is characterized in that, in claim 1 or 2 , the synthetic resin sheet is shaped in advance.

また、請求項４の発明は、請求項１，２又は３において、金型に前記合成樹脂シートに賦与すべき形状が設けられていることを特徴とする。 According to a fourth aspect of the present invention, in the first, second, or third aspect , the mold is provided with a shape to be imparted to the synthetic resin sheet.

また、請求項５の発明は、請求項１，２，３又は４において、金型に前記合成樹脂シートを埋設する掘込み凹部を設けることを特徴とする。 The invention of claim 5 is characterized in that, in claim 1, 2, 3 or 4 , an engraved recess for embedding the synthetic resin sheet is provided in the mold.

以上の本発明によれば、一回の型閉じによって小径穴を有する合成樹脂シートと大径穴を有する合成樹脂成形部とが一体的に形成された合成樹脂成形品を得ることができ、別体の小径穴を有する合成樹脂シートと大径穴を有する合成樹脂成形部とを貼り合わせるようにした従来方法に比較して、工程数を減らし、低コストで製造することが可能となる。   According to the present invention described above, a synthetic resin molded product in which a synthetic resin sheet having a small diameter hole and a synthetic resin molded portion having a large diameter hole are integrally formed by one-time mold closing can be obtained. Compared to a conventional method in which a synthetic resin sheet having a small-diameter hole and a synthetic resin-molded portion having a large-diameter hole are bonded together, the number of steps can be reduced and the production can be performed at low cost.

しかも、合成樹脂成形部に形成された大径穴は、可動金型に設けられた大径穴形成部によって成形されるため、成形跡が綺麗であり、しかもトンネルゲートを使用するため、成形品全体としても綺麗な仕上がりになる。   Moreover, since the large-diameter hole formed in the synthetic resin molding part is molded by the large-diameter hole forming part provided in the movable mold, the molding mark is clean and the tunnel gate is used, so the molded product The overall result is beautiful.

さらに、本発明によれば、成形品の外周側部に合成樹脂シートをかぶせた状態で絞り加工が成され、従来のサイドゲートを用いて成形する方法と異なり、成形品の端面にゲート跡がなく、成形品の端面の研磨加工が不要となり、コストダウンが可能となる。   Furthermore, according to the present invention, the drawing is performed in a state where the outer peripheral side portion of the molded product is covered with the synthetic resin sheet, and unlike the conventional method of molding using the side gate, the gate mark is formed on the end surface of the molded product. Therefore, it is not necessary to polish the end face of the molded product, and the cost can be reduced.

また、本発明によれば、従来において問題であった、ゲートが金型の中央付近以外に位置するように構成されたサイドゲートを用いた場合に生じる、合成樹脂シートが溶融樹脂の流れ方向に不均等に引き延ばされる問題、合成樹脂シートに印刷等を施した絵柄や意匠位置に生じるずれの問題、及びその修正を繰り返したり、印刷のし直しをするためのコストアップの問題がない。   In addition, according to the present invention, the synthetic resin sheet that occurs in the case of using a side gate configured so that the gate is located at a position other than the vicinity of the center of the mold, which has been a problem in the past, is in the flow direction of the molten resin. There is no problem of uneven stretching, problems of misalignment in the design or design position of the synthetic resin sheet printed, and problems of cost increase for repeated correction or reprinting.

即ち、本発明によれば、溶融樹脂の注入経路が成形品の略中央位置に設けられたスプルー及び複数のトンネルゲートを介して行われるため、成形品全体が均等に成形され、製品のばらつきが少なく、従来のように多数回の修正の必要もないため、品質及び生産性が大幅に向上する。   That is, according to the present invention, since the injection route of the molten resin is performed through the sprue and the plurality of tunnel gates provided at substantially the center position of the molded product, the entire molded product is molded evenly, and product variations are caused. There are few, and there is no need for multiple corrections as in the prior art, so the quality and productivity are greatly improved.

また、本発明の製造方法によれば、金型による賦形が良好に行われ、意匠ズレが少ないことと併せて、形状性及び意匠性に優れた合成樹脂成形品を得ることができる。   Moreover, according to the manufacturing method of this invention, the shaping | molding by a metal mold | die is performed favorably, and it can combine with that there are few design shifts, and can obtain the synthetic resin molded product excellent in the formability and the designability.

さらに、成形品の表面を成す合成樹脂シートの加飾として金属箔の使用が可能であり、優れた金属調外観と良好なバックライティングを行い得る合成樹脂成形品を得ることが可能となる。   Furthermore, it is possible to use a metal foil as a decoration of the synthetic resin sheet forming the surface of the molded product, and it is possible to obtain a synthetic resin molded product capable of providing an excellent metallic appearance and good backlighting.

以下、本発明の実施例について図面を参照しながら説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１、２に示すように、本実施例による合成樹脂成形品１として示す自動車の速度計用パネルの表側に設けられた合成樹脂シート２には、その中心にメータ針用の回転軸６を挿通するための小径穴４が形成され、その周囲には目盛及び数値７が形成され、さらに下部には走行距離計用窓８が形成されている。   As shown in FIGS. 1 and 2, a synthetic resin sheet 2 provided on the front side of a speedometer panel of an automobile shown as a synthetic resin molded article 1 according to this embodiment has a rotating shaft 6 for a meter needle at the center thereof. A small-diameter hole 4 for insertion is formed, a scale and a numerical value 7 are formed around it, and an odometer window 8 is formed in the lower part.

また、合成樹脂シート２の中央には上記のように小径穴４が形成されると共に、該小径穴４の形成部位に対応して、合成樹脂成形部３の中央には小径穴４よりも大なる大径穴５が形成されている。   In addition, a small-diameter hole 4 is formed in the center of the synthetic resin sheet 2 as described above, and the center of the synthetic resin molded portion 3 is larger than the small-diameter hole 4 corresponding to the formation site of the small-diameter hole 4. A large-diameter hole 5 is formed.

このように、合成樹脂シート２の小径穴４と合成樹脂成形部３の大径穴５とが内径において異なるのは、図２に示すように、これらの小径穴４及び大径穴５にメータ針の回転軸６を挿入した状態で、表面をなす合成樹脂シート２の小径穴４から外部に光漏れが生じないように、合成樹脂成形部３の大径穴５の内周に光漏れ防止用リング９を嵌合するための空間が必要となるためである。   As described above, the small diameter hole 4 of the synthetic resin sheet 2 and the large diameter hole 5 of the synthetic resin molded portion 3 are different in the inner diameter as shown in FIG. In the state where the needle rotation shaft 6 is inserted, light leakage prevention is provided on the inner periphery of the large diameter hole 5 of the synthetic resin molded portion 3 so that light leakage does not occur outside from the small diameter hole 4 of the synthetic resin sheet 2 forming the surface. This is because a space for fitting the use ring 9 is required.

また、上記の合成樹脂成形品１において、図２に示すように、表面をなす合成樹脂シート２は外周形状２ａから内方に向けて窪みを有すると共に、中央へ向けて次第に隆起した形状の賦形がなされている。このような合成樹脂シート２の形状は、後述するように、合成樹脂シート２が予め所定形状に賦形されているか、金型に合成樹脂シート２に賦与すべき形状が設けられていることによって形成することができる。   Further, in the synthetic resin molded product 1, as shown in FIG. 2, the synthetic resin sheet 2 forming the surface has a dent from the outer peripheral shape 2 a toward the inside, and has a shape that gradually rises toward the center. The shape is made. As will be described later, the shape of the synthetic resin sheet 2 is such that the synthetic resin sheet 2 is shaped in advance in a predetermined shape or a mold is provided with a shape to be imparted to the synthetic resin sheet 2. Can be formed.

また、不図示であるが、合成樹脂シート２が金型により賦与された立体絵柄又は模様を有するようにしてもよい。その例として、合成樹脂成形品１の表面の目盛及び数値７を立体化する。   Although not shown, the synthetic resin sheet 2 may have a three-dimensional pattern or pattern imparted by a mold. As an example, the surface scale and the numerical value 7 of the synthetic resin molded product 1 are three-dimensionalized.

上記のように、合成樹脂シート２に種々の形状を賦形するために、合成樹脂シート２の厚みは0.1ｍｍ〜1.0ｍｍとするのが好ましい。この合成樹脂シート２の厚みが0.1ｍｍよりも薄いと賦形の際に合成樹脂シート２が破れるおそれがあり、また1.0ｍｍよりも厚いと所定形状をシャープに賦形するのが困難になる。   As described above, in order to shape the synthetic resin sheet 2 in various shapes, the thickness of the synthetic resin sheet 2 is preferably 0.1 mm to 1.0 mm. If the thickness of the synthetic resin sheet 2 is less than 0.1 mm, the synthetic resin sheet 2 may be broken during shaping, and if it is thicker than 1.0 mm, it becomes difficult to sharply shape the predetermined shape.

また、図１に示すように、合成樹脂成形品１の表面は透明のポリカーボネート等による合成樹脂シート２を用い、この合成樹脂シート２の表面には全面的に黒色のインク膜１１が形成され、インク膜１１の外方は非成形部１３を成すものとされている。   Further, as shown in FIG. 1, a synthetic resin sheet 2 made of transparent polycarbonate or the like is used for the surface of the synthetic resin molded product 1, and a black ink film 11 is formed on the entire surface of the synthetic resin sheet 2. The outer side of the ink film 11 forms a non-molded portion 13.

インク膜１１は、合成樹脂シート２に施したインク膜厚が目盛及び数値７のように単層の場合には４μ以上とし、黒地部のように二層以上の場合には８μ以上とすることによってバックライティングが可能となる。この場合、インク膜厚が単層の場合に４μよりも薄かったり、二層以上の場合に８μよりも薄かったりするとピンホールが発生して透過照明時に漏光し、バックライティングができなくなる。   The ink film 11 should be 4 μ or more when the ink film thickness applied to the synthetic resin sheet 2 is a single layer as indicated by the scale and the numerical value 7, and 8 μ or more when the ink film 11 is two or more layers such as a black background. Enables backlighting. In this case, if the ink film thickness is thinner than 4μ when it is a single layer, or thinner than 8μ when it is two or more layers, a pinhole is generated and light leaks during transmission illumination, making backlighting impossible.

また、合成樹脂シート２が、可視光線透過率１％〜５０％のアルミニウム、クロム、銀、ニッケル等の金属又は金属調箔を有するものとしてもよい。この場合、可視光透過率が１%より低いと透過照明時に暗すぎて実用に耐えない。また、可視光透過率が５０%よりも高いと光があまり反射されず、金属調の外観が損なわれるものである。   The synthetic resin sheet 2 may have a visible light transmittance of 1% to 50%, such as aluminum, chromium, silver, nickel, or other metal or metal foil. In this case, if the visible light transmittance is lower than 1%, it is too dark at the time of transmitted illumination and cannot be practically used. On the other hand, if the visible light transmittance is higher than 50%, the light is not reflected so much and the metallic appearance is impaired.

一方、図３に示すように、上記の合成樹脂成形品１の裏面を見ると、合成樹脂成形部３が所定形状に形成され、その中心付近の周部には取付用の脚部１２が形成されている。この合成樹脂成形部３は透明の合成樹脂から成り、上記の透光性を有する速度目盛及び数値７に光を入射可能としている。ただし、この合成樹脂成形品１の周囲から光漏れが生じないように、その外周形状２ａの側部には前面部と同様に黒色の着色が施されている。   On the other hand, as shown in FIG. 3, when the back surface of the synthetic resin molded product 1 is viewed, the synthetic resin molded portion 3 is formed in a predetermined shape, and the mounting leg portion 12 is formed in the peripheral portion near the center. Has been. The synthetic resin molding portion 3 is made of a transparent synthetic resin, and allows light to be incident on the above-described speed scale and numerical value 7 having translucency. However, in order to prevent light leakage from the periphery of the synthetic resin molded product 1, the side portion of the outer peripheral shape 2a is colored in black as in the front portion.

上記のように、本発明による合成樹脂成形品１の一例として速度計用パネルを挙げたが、図１〜図３の成形品は、周囲に非成形部１３を有するものであり、この非成形部１３には成形加工時に使用される位置決めピン用の挿通穴１４が形成されている。ただし、この非成形部１３は打抜き加工等によって削除される。なお、後述するように、本発明によれば、成形加工の当初から、周囲に非成形部１３のない形状、即ち成形品の最終的な外形を得ることも可能である。   As described above, the speedometer panel is given as an example of the synthetic resin molded article 1 according to the present invention. However, the molded article shown in FIGS. 1 to 3 has the non-molded portion 13 around the non-molded part. The part 13 is formed with an insertion hole 14 for a positioning pin used during molding. However, the non-molded portion 13 is deleted by punching or the like. As will be described later, according to the present invention, from the beginning of the molding process, it is possible to obtain a shape without the non-molded portion 13 around it, that is, a final outer shape of the molded product.

以下に、本発明によって上記の合成樹脂成形品１を製造する方法について説明する。なお、本実施例においては、合成樹脂シート２は賦形されていない平坦な状態で使用し、所定の外形形状に打抜き加工せず、また左右の所定位置には位置決めピン用の挿通穴１４が形成されているものを使用している。   Below, the method to manufacture said synthetic resin molded product 1 by this invention is demonstrated. In this embodiment, the synthetic resin sheet 2 is used in a flat state that is not shaped, is not stamped into a predetermined outer shape, and insertion holes 14 for positioning pins are provided at predetermined positions on the left and right. Use what is formed.

図４に示すように、固定金型１５には合成樹脂シート２に賦与すべき金型形状が形成され、その中央にはスプルーブッシュ１６が設けられている。このスプルーブッシュ１６の端部はパーティング面からキャビティ２７側に突出した突出部１６ｂを有し、この突出部１６ｂの外周に、予め合成樹脂シート２に形成してある中央の小径穴４を嵌合し、この状態で合成樹脂シート２を固定金型１５と可動金型１７との間に装着する。即ち、スプルーブッシュ１６の突出部１６ｂは合成樹脂シート２の中央の小径穴４に密着状に嵌合され得る外径を有するものである。   As shown in FIG. 4, a mold shape to be applied to the synthetic resin sheet 2 is formed in the fixed mold 15, and a sprue bush 16 is provided in the center thereof. The end portion of the sprue bushing 16 has a protruding portion 16b protruding from the parting surface toward the cavity 27, and a central small-diameter hole 4 previously formed in the synthetic resin sheet 2 is fitted on the outer periphery of the protruding portion 16b. In this state, the synthetic resin sheet 2 is mounted between the fixed mold 15 and the movable mold 17. That is, the protrusion 16 b of the sprue bush 16 has an outer diameter that can be fitted into the small-diameter hole 4 in the center of the synthetic resin sheet 2 in a close contact manner.

また、固定金型１５にはパーティング面から可動金型１７側に突出する位置決めピン１８が固定されている。この位置決めピン１８は、金型を閉じた際に、可動金型１７に形成されたピン穴１８ａに挿入される。   A positioning pin 18 is fixed to the fixed mold 15 so as to protrude from the parting surface toward the movable mold 17. The positioning pin 18 is inserted into a pin hole 18a formed in the movable mold 17 when the mold is closed.

一方、可動金型１７には、合成樹脂シート２の中央の小径穴４よりも大径（即ち、スプルーブッシュ１６の突出部１６ｂの外径よりも大径）の大径穴形成部１９が形成されている。また、この大径穴形成部１９の周りには合成樹脂成形部３に賦与すべき所定形状のキャビティ２７を有する成形型２０が形成されている。   On the other hand, the movable mold 17 is formed with a large-diameter hole forming portion 19 having a larger diameter than the central small-diameter hole 4 of the synthetic resin sheet 2 (that is, a larger diameter than the outer diameter of the protruding portion 16b of the sprue bush 16). Has been. A molding die 20 having a cavity 27 having a predetermined shape to be applied to the synthetic resin molding portion 3 is formed around the large-diameter hole forming portion 19.

さらに、可動金型１７には、合成樹脂シート２の周部（非成形部１３）を埋設する掘込み凹部２６が設けられている。   Further, the movable mold 17 is provided with a dug recess 26 in which a peripheral portion (non-molded portion 13) of the synthetic resin sheet 2 is embedded.

なお、合成樹脂成形品１の合成樹脂成形部３は、上記のように製品取付用の脚部１２を備えるものであり、このため、可動金型１７には脚部１２の形状に対応する型形状１２ｂ（図４参照）が形成されている。ただし、この脚部１２は端部にフック形状のアンダカット部１２ａを有するため、可動金型１７に不図示のスライドコアを備えた構成で対処する。   In addition, the synthetic resin molding part 3 of the synthetic resin molded product 1 includes the product mounting leg 12 as described above. For this reason, the movable mold 17 has a mold corresponding to the shape of the leg 12. A shape 12b (see FIG. 4) is formed. However, since this leg portion 12 has a hook-shaped undercut portion 12a at the end portion, this is dealt with by a configuration in which the movable mold 17 is provided with a slide core (not shown).

さらに、可動金型１７には上記のスプルーブッシュ１６の下端部に連通するトンネルゲート２１が設けられている。このトンネルゲート２１は、合成樹脂成形部３に対して垂直状に設けられたボス２２に連結され、このボス２２を経てキャビティ２７内に至る流通経路となる。なお、図示のトンネルゲート２１は、金型の開閉時にボス２２による成形部（図５のボス部２２ａ）とトンネルゲート２１による成形部（図５のトンネルゲート部２１ａ）を図６のように自動切断するために、パーティング面に対して４５°〜６０°の傾斜角を有するように設ける必要がある。   Further, the movable mold 17 is provided with a tunnel gate 21 communicating with the lower end portion of the sprue bushing 16. The tunnel gate 21 is connected to a boss 22 provided perpendicular to the synthetic resin molding portion 3, and serves as a distribution path through the boss 22 into the cavity 27. The tunnel gate 21 shown in FIG. 6 automatically forms a molding part by the boss 22 (boss part 22a in FIG. 5) and a molding part by the tunnel gate 21 (tunnel gate part 21a in FIG. 5) as shown in FIG. In order to cut, it is necessary to provide an inclination angle of 45 ° to 60 ° with respect to the parting surface.

また、可動金型１７には、上記のスプルーブッシュ１６の下端部から多少離間した位置にＺピン２３が設けられ、その端部のＺ形部２３ａでスプルー部１６ａの下方部を引っ掛けた状態にする（図５参照）。さらに、可動金型１７にはキャビティ２７に対応した位置に突出しピン２５が設けられている。   The movable die 17 is provided with a Z pin 23 at a position slightly spaced from the lower end portion of the sprue bushing 16, and the lower portion of the sprue portion 16a is hooked by the Z-shaped portion 23a of the end portion. (See FIG. 5). Further, the movable mold 17 is provided with a protruding pin 25 at a position corresponding to the cavity 27.

上記の金型構成により、図５に示すように、不図示の射出成形機のシリンダから供給された溶融樹脂２４は、不図示のノズルからスプルーブッシュ１６を経てトンネルゲート２１を流通し、さらにボス２１を経てキャビティ２７内に注入される。   With the above mold configuration, as shown in FIG. 5, the molten resin 24 supplied from a cylinder of an injection molding machine (not shown) circulates from the nozzle (not shown) through the sprue bush 16 through the tunnel gate 21 and further to the boss. It is injected into the cavity 27 through 21.

このように、溶融樹脂２４をキャビティ２７内に注入すると、溶融樹脂の有する温度と注入圧力によって合成樹脂シート２が変形し、固定金型１５の金型形状（成形型２０）に応じた賦形がなされる。また、合成樹脂成形品１の外周形状の側部には合成樹脂シート２をかぶせた状態で絞り加工が成される。   As described above, when the molten resin 24 is injected into the cavity 27, the synthetic resin sheet 2 is deformed by the temperature and injection pressure of the molten resin, and is shaped according to the mold shape (molding mold 20) of the fixed mold 15. Is made. In addition, the side of the outer peripheral shape of the synthetic resin molded product 1 is drawn with the synthetic resin sheet 2 covered.

その後、図６に示すように、キャビティ２７内の溶融樹脂２４が冷却固化されてから、不図示のスライドコアを作動して脚部１２のアンダカット部１２ａを解除した後、パーティング面を開くと、少し遅れて突出しピン２５とＺピン２３が作動する。このとき、突出しピン２５によって合成樹脂成形品１が可動金型１７から突き出され、Ｚピン２３によってスプルー部１６ａがトンネルゲート部２１ａと一体的に可動金型１７から突き出され、このような突出し動作によってトンネルゲート部２１ａがボス部２２ａから自動的に切断される。   Thereafter, as shown in FIG. 6, after the molten resin 24 in the cavity 27 is cooled and solidified, a slide core (not shown) is operated to release the undercut portion 12a of the leg portion 12, and then the parting surface is opened. Then, the projecting pin 25 and the Z pin 23 are operated with a slight delay. At this time, the synthetic resin molded product 1 is protruded from the movable mold 17 by the protruding pin 25, and the sprue portion 16a is protruded from the movable mold 17 integrally with the tunnel gate portion 21a by the Z pin 23. Thus, the tunnel gate portion 21a is automatically cut from the boss portion 22a.

そして、図６に示すうように、金型を開いた状態で、まず合成樹脂成形品１を取り出し、次いでスプルー部１６ａとトンネルゲート部２１ａとを取り出す。なお、合成樹脂成形品１に残されたボス部２２ａは不要であるため、後加工で切断してもよい。   Then, as shown in FIG. 6, with the mold opened, first, the synthetic resin molded product 1 is taken out, and then the sprue portion 16a and the tunnel gate portion 21a are taken out. In addition, since the boss | hub part 22a left in the synthetic resin molded product 1 is unnecessary, you may cut | disconnect by post-processing.

本実施例の合成樹脂成形品１は、図７、図８に示すように、例えば自動車の速度計用パネルに適用され、その表面をなす合成樹脂シート２の中心にメータ針用の回転軸を挿通するための小径穴４が形成され、その周囲に速度目盛及び数値７が形成され、さらに下部に走行距離計用窓８が形成されている点等においては上記の実施例と同様の構成によるものである。   As shown in FIGS. 7 and 8, the synthetic resin molded product 1 of this embodiment is applied to, for example, an automobile speedometer panel, and a rotation axis for a meter needle is provided at the center of the synthetic resin sheet 2 forming the surface thereof. A small-diameter hole 4 for insertion is formed, a speed scale and a numerical value 7 are formed around it, and an odometer window 8 is formed at the lower part, etc. Is.

ただし、本実施例は、合成樹脂シート２の外周が予め絞り加工され、且つ打抜き加工されており、上記の実施例のような周囲の非成形部１３を持たず、合成樹脂成形品１の外周形状２ａの側部には合成樹脂シート２がかぶせられた状態に成形されるものである。   However, in this embodiment, the outer periphery of the synthetic resin sheet 2 is drawn and punched in advance, and does not have the surrounding non-molded portion 13 as in the above embodiment, and the outer periphery of the synthetic resin molded product 1. The side of the shape 2a is molded in a state where the synthetic resin sheet 2 is covered.

また、その製造方法においても、図９に示すように、固定金型１５と可動金型１７の成形型２０が合成樹脂成形品１の最終形状と一致したキャビティ形状を有し、実施例１のような周囲の非成形部１３を埋設するための掘込み凹部２６（図５参照）が形成されていない。それ以外は、実施例１と同様に、スプルーブッシュ１６或いはトンネルゲート２１を有する金型を使用し、合成樹脂成形品１の中央には、合成樹脂シート２の小径穴４とそれよりも大なる大径穴５を有する合成樹脂成形部３を一体的に形成することができる。   Also in the manufacturing method, as shown in FIG. 9, the mold 20 of the fixed mold 15 and the movable mold 17 has a cavity shape that matches the final shape of the synthetic resin molded product 1. Such a dug recess 26 (see FIG. 5) for embedding the surrounding non-molded portion 13 is not formed. Other than that, the mold which has the sprue bush 16 or the tunnel gate 21 is used like Example 1, and the small diameter hole 4 of the synthetic resin sheet 2 is larger than that at the center of the synthetic resin molded product 1. The synthetic resin molding part 3 having the large-diameter hole 5 can be integrally formed.

また、この実施例においても、成形時に、合成樹脂シート２が外周だけでなく全体に所定形状に予め賦形されているものを用いたり、金型に合成樹脂シート２に賦与すべき形状を設けておくことによって所定形状に賦形するようにしてもよい。   Also in this embodiment, at the time of molding, the synthetic resin sheet 2 is preliminarily shaped into a predetermined shape as well as the outer periphery, or the mold is provided with a shape to be imparted to the synthetic resin sheet 2. You may make it shape in a predetermined shape by keeping.

上記のように、実施例１と実施例２とを説明したが、それぞれの実施例において、固定金型１５側に設けられたスプルーブッシュ１６と可動金型１７側に設けられた大径穴形成部１９及びトンネルゲート２１等の構造を２箇所以上設けることによって、複数個の合成樹脂成形品１を形成することが可能となる。   As described above, the first and second embodiments have been described. In each of the embodiments, the sprue bush 16 provided on the fixed mold 15 side and the large-diameter hole formed on the movable mold 17 side are formed. A plurality of synthetic resin molded products 1 can be formed by providing two or more structures such as the portion 19 and the tunnel gate 21.

また、本発明による合成樹脂成形品は、それれぞれの実施例において、自動車の速度計用パネルを具体例としてあるが、本発明はこれに限定されるものではなく、他の合成樹脂製品において、合成樹脂シートに小径穴を有すると共に合成樹脂成形部にそれよりも大なる大径穴を有する合成樹脂成形品及びその製造方法に適用することが可能である。   In addition, the synthetic resin molded product according to the present invention has an automobile speedometer panel as a specific example in each example, but the present invention is not limited to this, and other synthetic resin products are used. The synthetic resin sheet can be applied to a synthetic resin molded product having a small diameter hole and a synthetic resin molded part having a larger diameter hole than that, and a method for manufacturing the same.

本発明の合成樹脂成形品及びその加工方法は、自動車の速度計や回転計等の計器板、エアコンにおける制御パネル、時計文字板、家電製品の表示板、さらにはその他の合成樹脂成形品において、合成樹脂シートに小径穴を有すると共に合成樹脂成形部にそれよりも大なる大径穴を有する合成樹脂成形品及びその製造方法として利用することが可能である。   The synthetic resin molded product of the present invention and its processing method are used in instrument panels such as speedometers and tachometers for automobiles, control panels in air conditioners, clock dials, display boards for home appliances, and other synthetic resin molded products. The synthetic resin sheet can be used as a synthetic resin molded product having a small-diameter hole and a synthetic resin molded part having a larger-diameter hole larger than that and a manufacturing method thereof.

本発明による実施例１の合成樹脂成形品の表側平面図である。It is a front side top view of the synthetic resin molded product of Example 1 by this invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明による実施例１の合成樹脂成形品を裏側から見た斜視図である。It is the perspective view which looked at the synthetic resin molded product of Example 1 by this invention from the back side. 本発明による実施例１の合成樹脂成形品の製造方法を示す断面図であり、金型を閉じた状況を示す。It is sectional drawing which shows the manufacturing method of the synthetic resin molded product of Example 1 by this invention, and shows the condition which closed the metal mold | die. 本発明による実施例１の合成樹脂成形品の製造方法を示す断面図であり、金型内に溶融樹脂を注入した状況を示す。It is sectional drawing which shows the manufacturing method of the synthetic resin molded product of Example 1 by this invention, and shows the condition which injected molten resin in the metal mold | die. 本発明による実施例１の合成樹脂成形品の製造方法を示す断面図であり、金型を開いた状況を示す。It is sectional drawing which shows the manufacturing method of the synthetic resin molded product of Example 1 by this invention, and shows the condition which opened the metal mold | die. 本発明による実施例２の合成樹脂成形品を裏側から見た斜視図である。It is the perspective view which looked at the synthetic resin molded product of Example 2 by this invention from the back side. 本発明による実施例２の合成樹脂成形品の直径箇所に相当する断面図である。It is sectional drawing equivalent to the diameter location of the synthetic resin molded product of Example 2 by this invention. 本発明による実施例３の合成樹脂成形品の製造方法を示す断面図であり、金型を閉じた状況を示す。It is sectional drawing which shows the manufacturing method of the synthetic resin molded product of Example 3 by this invention, and shows the condition which closed the metal mold | die.

符号の説明Explanation of symbols

１…合成樹脂成形品
２…合成樹脂シート
２ａ…外周形状
３…合成樹脂成形部
４…小径穴
５…大径穴
６…回転軸
７…速度目盛及び数値
８…走行距離計用窓
９…光漏れ防止用リング
１１…インク膜
１２…脚部
１２ａ…アンダカット部
１３…非成形部
１４…挿通穴
１５…固定金型
１６…スプルーブッシュ
１６ａ…スプルー部
１６ｂ…突出部
１７…可動金型
１８…位置決めピン
１８ａ…ピン穴
１９…大径穴形成部
２０…成形型
２１…トンネルゲート
２１ａ…トンネルゲート部
２２…ボス
２２ａ…ボス部
２３…Ｚピン
２３ａ…Ｚ形部
２４…溶融樹脂
２５…突出しピン
２６…掘込み凹部
２７…キャビティ
DESCRIPTION OF SYMBOLS 1 ... Synthetic resin molded product 2 ... Synthetic resin sheet 2a ... Outer periphery shape 3 ... Synthetic resin molding part 4 ... Small diameter hole 5 ... Large diameter hole 6 ... Rotating shaft 7 ... Speed scale and numerical value 8 ... Odometer window 9 ... Light Leakage prevention ring 11 ... ink film 12 ... leg 12a ... undercut part 13 ... non-molding part 14 ... insertion hole 15 ... fixed mold 16 ... sprue bush 16a ... sprue part 16b ... projecting part 17 ... movable mold 18 ... Positioning pin 18a ... Pin hole 19 ... Large diameter hole forming part 20 ... Mold 21 ... Tunnel gate 21a ... Tunnel gate part 22 ... Boss 22a ... Boss part 23 ... Z pin 23a ... Z-shaped part 24 ... Molten resin 25 ... Projecting pin 26 ... Dimple recess 27 ... Cavity

Claims (5)

合成樹脂成形部の表面及び端面の一部又は全部に設けられた合成樹脂シートの小径穴よりも大なる大径穴を形成するようにしたバックライティングを可能とする合成樹脂成形品の製造方法において、前記小径穴及び大径穴に回転軸を挿入した状態で、表面をなす合成樹脂シートの小径穴から外部に光漏れが生じないように、合成樹脂成形部の大径穴の内周に光漏れ防止用リングを嵌合するための空間が必要となるため、前記小径穴よりも大なる大径穴が光漏れ防止リングを嵌合するために形成されるようにし、固定金型に設けられたスプルーブッシュの突出部外周に前記合成樹脂シートの小径穴を嵌合した状態で該合成樹脂シートが前記固定金型と可動金型との間に装着されると共に、前記合成樹脂シートの小径穴の周りに位置して該小径穴よりも大なる大径穴形成部が前記可動金型に形成され、該大径穴形成部の周りに形成された所定形状の型内に前記スプルーブッシュに連通された複数のトンネルゲートを介して溶融樹脂を注入することによって前記大径穴が形成されるようにしたことを特徴とする合成樹脂成形品の製造方法。 In a method for producing a synthetic resin molded article that enables backlighting in which a large-diameter hole larger than the small-diameter hole of a synthetic resin sheet provided on part or all of the surface and end surface of the synthetic resin molded portion is formed. In the state where the rotary shaft is inserted into the small diameter hole and the large diameter hole, light is emitted to the inner periphery of the large diameter hole of the synthetic resin molded portion so that light does not leak outside from the small diameter hole of the synthetic resin sheet forming the surface. Since a space for fitting the leakage prevention ring is required, a large-diameter hole larger than the small-diameter hole is formed to fit the light leakage prevention ring, and is provided in the fixed mold. The synthetic resin sheet is mounted between the fixed mold and the movable mold in a state where the small diameter hole of the synthetic resin sheet is fitted to the outer periphery of the protruding portion of the sprue bush, and the small diameter hole of the synthetic resin sheet is mounted. The small diameter hole located around A larger-diameter hole forming portion is formed in the movable mold, and a plurality of tunnel gates communicated with the sprue bushing in a mold having a predetermined shape formed around the large-diameter hole forming portion. A method for producing a synthetic resin molded product, wherein the large-diameter hole is formed by pouring molten resin. 前記固定金型側に設けられた前記スプルーブッシュと前記可動金型側に設けられた前記大径穴形成部及び前記複数のトンネルゲートの構造を２箇所以上設けることによって、複数個の合成樹脂成形品を成形することを特徴とする請求項１記載の合成樹脂成形品の製造方法。 A plurality of synthetic resin moldings are provided by providing two or more structures of the sprue bush provided on the fixed mold side, the large-diameter hole forming portion provided on the movable mold side, and the plurality of tunnel gates. The method for producing a synthetic resin molded product according to claim 1, wherein the product is molded. 前記合成樹脂シートが予め賦形されていることを特徴とする請求項１又は２記載の合成樹脂成形品の製造方法。 The method for producing a synthetic resin molded article according to claim 1 or 2, wherein the synthetic resin sheet is pre-shaped. 金型に前記合成樹脂シートに賦与すべき形状が設けられていることを特徴とする請求項１、２又は３記載の合成樹脂成形品の製造方法。 The method for producing a synthetic resin molded product according to claim 1, 2 or 3 , wherein the mold is provided with a shape to be imparted to the synthetic resin sheet. 金型に前記合成樹脂シートを埋設する掘込み凹部を設けることを特徴とする請求項１、２、３又は４記載の合成樹脂成形品の製造方法。 The method for producing a synthetic resin molded article according to claim 1, 2, 3, or 4 , wherein a recessed portion for embedding the synthetic resin sheet is provided in a mold.
JP2004035368A 2004-02-12 2004-02-12 Synthetic resin molded product and method for producing the same Expired - Lifetime JP3988082B2 (en)

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CNB2004100445213A CN100427287C (en) 2004-02-12 2004-05-12 Synthetic resin forming product and producing method thereof
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