JP5190778B2 - Multilayer molding apparatus and multilayer molding method - Google Patents

Multilayer molding apparatus and multilayer molding method Download PDF

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JP5190778B2
JP5190778B2 JP2008173306A JP2008173306A JP5190778B2 JP 5190778 B2 JP5190778 B2 JP 5190778B2 JP 2008173306 A JP2008173306 A JP 2008173306A JP 2008173306 A JP2008173306 A JP 2008173306A JP 5190778 B2 JP5190778 B2 JP 5190778B2
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昭男 岡本
勝美 青木
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Ube Machinery Corp Ltd
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Description

本発明は、型閉じして複数のキャビティを形成する金型を用いて、一次成形と二次成形とによって樹脂を積層状態に射出成形して多層成形を行う多層成形装置、及び多層成形方法に関するものである。特に、キャビティの移動や交換を行うことなく多層成形品を得る多層成形装置、及び多層成形方法に関する。   The present invention relates to a multilayer molding apparatus and a multilayer molding method for performing multilayer molding by injection molding a resin into a laminated state by primary molding and secondary molding using a mold that closes the mold to form a plurality of cavities. Is. In particular, the present invention relates to a multilayer molding apparatus and a multilayer molding method for obtaining a multilayer molded product without moving or exchanging cavities.

従来、色合いの異なる樹脂、または種類の異なる樹脂材料等を用いて一体化した多層成形品を得る成形方法として、キャビティスライド方式或いはキャビティ回転方式等が用いられる。
このうちキャビティスライド方式を用いた多層成形方法は、例えば特許文献1により提案されている。
この成形方法では、第1及び第2の二つの凹部が形成されたスライド金型を備えた固定型と、一つの凹部が形成された可動型を使用する。一次の成形は、スライド金型の第1の凹部と可動型の凹部で形成されるキャビティに溶融樹脂を充填する。次いで、金型を開き、一次成形品を可動型に残したままスライド型を所定の位置に移動させ、再び金型を閉じる。二次の成形は、一次成形品とスライド金型の第2の凹部とで形成されたキャビティに溶融樹脂を充填して多層成形品を得る。
Conventionally, a cavity slide method, a cavity rotation method, or the like is used as a molding method for obtaining an integrated multilayer molded product using resins of different colors or resin materials of different types.
Among these, a multilayer molding method using a cavity slide method is proposed by, for example, Patent Document 1.
In this molding method, a fixed mold having a slide mold in which two first and second recesses are formed and a movable mold in which one recess is formed are used. In the primary molding, a molten resin is filled into a cavity formed by the first concave portion of the slide mold and the movable concave portion. Next, the mold is opened, the slide mold is moved to a predetermined position while the primary molded product remains in the movable mold, and the mold is closed again. In the secondary molding, a molten resin is filled into a cavity formed by the primary molded product and the second concave portion of the slide mold to obtain a multilayer molded product.

上記従来の多層成形品の成形方法に用いる金型には、一次成形及び二次成形用の射出ユニットそれぞれのノズルに連通する、固定型プレートを横切るように形成された固定型スプル孔と、固定型スプル孔を介してスライド金型に形成されたスライド型スプル孔が設けられている。そして、このノズルに連通したスプル孔から一次成形用のキャビティと二次成形用のキャビティに順次溶融樹脂が充填されて多層成形品が成形される構成となっている。
ところで、このようにスライド型に設けたスプル孔を介してキャビティに樹脂を充填する成形用金型では、二次成形に際して不要となるスプルやランナが形成されない構造が要求されることから、ホットランナ等が移動するスライド型の内部に組み込まれる必要がある。また、移動するスライド型と固定プレートとの間でホットランナ等を組み合わせて樹脂流路を形成することは困難である。このため、金型構造が複雑で、さらに価格も高価となる。しかも、型閉した際に形成される成形のためのキャビティが一つであることから、一次成形と二次成形とを同時に行うことができない。
The mold used in the above-mentioned conventional method for forming a multilayer molded product includes a fixed mold sprue hole that is formed across the fixed mold plate and communicates with the nozzles of the injection units for primary molding and secondary molding. A slide type sprue hole formed in the slide mold through the mold sprue hole is provided. A multilayer molded article is formed by sequentially filling the molten resin into the primary molding cavity and the secondary molding cavity from the sprue hole communicating with the nozzle.
By the way, in the molding die in which the cavity is filled with the resin through the sprue hole provided in the slide mold as described above, a structure that does not form a sprue or a runner that is unnecessary in the secondary molding is required. Etc. need to be incorporated into the inside of the slide mold that moves. In addition, it is difficult to form a resin flow path by combining a hot runner or the like between the moving slide mold and the fixed plate. For this reason, the mold structure is complicated, and the price is also expensive. In addition, since there is one molding cavity formed when the mold is closed, primary molding and secondary molding cannot be performed simultaneously.

一方、キャビティ回転方式を用いた多層成形方法は、例えば特許文献2により提案されている。
この成形方法では、第1及び第2の二つの一次成形用の凹部が形成され可動盤に回動可能に取付けられた可動型と、一つの二次成形用凹部が形成された固定型とを使用する。一次の成形は、可動型の第1の凹部と固定型で形成されたキャビティに溶融樹脂を充填する。次いで、金型を開き、一次成形品を可動型に残したまま所定の位置に回転移動させ、再び金型を閉じる。二次の成形は、一次成形品と固定型の凹部で形成されたキャビティに溶融樹脂を充填して多層成形品を得る。
On the other hand, a multilayer molding method using a cavity rotation method is proposed by, for example, Patent Document 2.
In this molding method, a movable mold in which first and second concave portions for primary molding are formed and rotatably attached to a movable platen, and a fixed mold in which one concave portion for secondary molding is formed are provided. use. In the primary molding, a molten resin is filled into a cavity formed by the first concave portion of the movable mold and the fixed mold. Next, the mold is opened, the primary molded product is rotated and moved to a predetermined position while remaining in the movable mold, and the mold is closed again. In the secondary molding, a molten resin is filled into a cavity formed by the primary molded product and the concave portion of the fixed mold to obtain a multilayer molded product.

上記キャビティ回転方式を用いた成形方法では、型閉において二つのキャビティを形成することから、スライド金型方式に比べ一次成形と二次成形を同時に行うことができる点で優れている。しかし、可動盤に金型の反転機構を組み込んだ成形装置が必要で、装置が大型化するとともに高価となり、金型に比して投影面積の大きな成形品や複雑な形状の成形品を成形することができない。また、一次成形品を二次成形用のキャビティに移動させる場合、成形品と一体に形成されたランナを取り去る必要があった。このように構成されていることから、上記いずれの方式も一次成形から二次成形に移行するに際して、型開を行った後、金型をスライド或いは回転させて移動させなければならず、成形サイクルに無駄な時間が発生する。また、金型構造が複雑で、成形品の意匠面にゲートの痕跡が残ることや、一次成形樹脂と二次成形樹脂との境界部がずれることで外観不良が発生する。
特開2000−141406 特開2007−118214
The molding method using the cavity rotating method is superior in that primary molding and secondary molding can be performed simultaneously compared to the slide mold method because two cavities are formed when the mold is closed. However, a molding device incorporating a mold reversing mechanism in the movable plate is required, which increases the size and cost of the device, and molds a molded product having a large projected area or a complicated shape compared to the mold. I can't. Further, when the primary molded product is moved to the secondary molding cavity, it is necessary to remove the runner formed integrally with the molded product. Since it is configured in this way, when any of the above methods shifts from primary molding to secondary molding, after performing mold opening, the mold must be slid or rotated to move the molding cycle. Is wasted time. In addition, the mold structure is complicated, and the appearance defect occurs due to the trace of the gate remaining on the design surface of the molded product and the boundary between the primary molding resin and the secondary molding resin being shifted.
JP 2000-141406 A JP2007-118214

本発明の課題は、前記従来技術の問題点に鑑みてなされたもので、多層成形品を成形するに際して、簡略な構造の成形装置を用いて外観品質に優れた多層成形品を安価に得ることができる多層成形品の成形装置、及び成形方法を提供することにある。   The object of the present invention was made in view of the above-mentioned problems of the prior art, and when forming a multilayer molded product, a multilayer molded product with excellent appearance quality can be obtained at low cost using a molding device having a simple structure. It is an object of the present invention to provide a molding apparatus and a molding method for a multilayer molded product that can be manufactured.

本発明請求項1に記載の多層成形装置は、型閉じして複数のキャビティを形成する固定型と可動型とからなる一対の金型と、該金型を開閉する型締ユニットと、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えて、一種類以上の異なる溶融樹脂を金型内に射出充填して多層成形品を成形する多層成形装置において、前記複数のキャビティが、一次成形品を成形する一次成形用キャビティと、インサートされた前記一次成形品の表面と裏面の全面、若しくは周縁部を積層可能とする二次成形用キャビティとで構成されると共に、前記可動型のパーティング面に前記二次成形用キャビティへ連通する樹脂流路が設けられ、前記一次成形品と二次成形品とを同時に得るようにした。
According to a first aspect of the present invention, there is provided a multi-layer molding apparatus comprising: a pair of molds including a fixed mold and a movable mold that are closed to form a plurality of cavities; a mold clamping unit that opens and closes the mold; A plurality of injection units for filling the cavity with a molten resin, and injecting and filling one or more different molten resins into a mold to form a multilayer molded product, the plurality of cavities, a primary molding cavity for molding the primary molded article, the insert has been the primary molded article surface and the entire back surface, or with the peripheral portion is constituted by the secondary molding cavity to enable stacking, the movable mold A resin flow path communicating with the secondary molding cavity is provided on the parting surface, and the primary molded product and the secondary molded product are obtained simultaneously.

本発明請求項2に記載の多層成形方法は、型閉じして複数のキャビティを形成する固定型と可動型とからなる一対の金型と、該金型を開閉する型締ユニットと、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えた多層成形装置を用いて多層成形品を成形する多層成形方法において、一次成形用キャビティに溶融樹脂を供給して一次成形品を成形した後、金型を開いて前記一次成形品を二次成形用キャビティにインサートすると共に、前記一次成形品と二次成形用キャビティとの隙間に前記可動型のパーティング面に設けた樹脂流路を介して溶融樹脂を充填して、前記一次成形品の表面と裏面の全面、若しくは周縁部を積層して二次成形品を成形するときに、一次成形品を同時に成形するようにした。 According to a second aspect of the present invention, there is provided a multilayer molding method comprising: a pair of molds including a fixed mold and a movable mold that are closed to form a plurality of cavities; a mold clamping unit that opens and closes the mold; In a multilayer molding method for molding a multilayer molded article using a multilayer molding apparatus having a plurality of injection units for filling the cavity with molten resin, the molten resin was supplied to the primary molding cavity to mold the primary molded article after, the insert of the primary molded article in the secondary molding cavity by opening the mold, the resin passage provided in the parting surface of the movable die into the gap between the primary molded product and a secondary molding cavity When the molten resin is filled in and the secondary molded product is molded by laminating the entire surface of the primary molded product, the entire back surface, or the peripheral portion, the primary molded product is molded at the same time.

本発明請求項3に記載の多層成形方法は、請求項2に記載の発明において、前記複数の射出ユニットの両方又はいずれか一方の射出ユニットに発泡性溶融樹脂を用い、前記キャビティへ充填後に発泡させることとした。
本発明請求項4に記載の多層成形方法は、請求項2又は請求項3のいずれかにに記載の発明において、金属及び樹脂又は天然素材等で予め形成された補用部品を、前記複数のキャビティのいずれか一方にインサートすることとした。
The multilayer molding method according to claim 3 of the present invention is the method according to claim 2, wherein foamable molten resin is used for both or any one of the plurality of injection units, and foaming is performed after filling the cavity. I decided to let them.
The multilayer molding method according to claim 4 of the present invention is the invention according to claim 2 or claim 3, wherein a plurality of spare parts previously formed of metal and resin or natural materials are used. It was decided to insert into either one of the cavities.

本発明請求項5に記載の多層成形方法は、請求項4に記載の発明において、前記補用部品は一次成形用キャビティにインサートされ、一次成形品と一体化されたこととした。
本発明請求項6に記載の多層成形方法は、請求項4に記載の発明において、前記補用部品は二次成形用キャビティにインサートされ、一次成形品と前記補用部品との間に形成された隙間に溶融樹脂を充填して一体化されたこととした。
According to Claim 5 of the present invention, in the invention according to Claim 4, the auxiliary part is inserted into the primary molding cavity and integrated with the primary molded product.
A multilayer molding method according to a sixth aspect of the present invention is the method according to the fourth aspect, wherein the auxiliary part is inserted into a secondary molding cavity and formed between the primary molded part and the auxiliary part. The gap was filled with molten resin and integrated.

本発明に係る多層成形装置は、型閉じして複数のキャビティを形成する一対の金型と、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えたので、複数のキャビティを同時に成形することができ成形サイクルが向上する。そして、一次成形用キャビティで成形した一次成形品を型開の後取り出し二次成形用キャビティにインサートする構成としたので、キャビティをスライドする機構や回転する機構を用いることがないので、金型構造や設備構造が簡略化され、成形装置のコストを低減することができるとともに、成形装置を省スペース化できるという効果を有する。さらには、金型の大きさに比して投影面積の大きな成形品を得ることが可能となる。
また、金型内に所定形状の補用部品がキャビティ内に供給されて成形品と一体化されるので、製品デザインの自由度が向上し、複雑且つ、意匠性に優れた多層成形品得ることができる。
The multilayer molding apparatus according to the present invention includes a pair of molds that closes the mold to form a plurality of cavities and a plurality of injection units that fill the plurality of cavities with molten resin. The molding cycle can be improved. Since the primary molded product molded in the primary molding cavity is taken out after mold opening and inserted into the secondary molding cavity, there is no need to use a mechanism for sliding or rotating the cavity. And the equipment structure can be simplified, the cost of the molding apparatus can be reduced, and the molding apparatus can be saved in space. Furthermore, it is possible to obtain a molded product having a large projected area compared to the size of the mold.
In addition, since a spare part of a predetermined shape is supplied into the mold and integrated with the molded product, the degree of freedom in product design is improved, and a multilayer molded product that is complex and excellent in design is obtained. Can do.

本発明に係る多層成形方法は、型閉じして複数のキャビティを形成する一対の金型と、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えた多層成形装置を用いたので、複数のキャビティを同時に成形することができる。そして、一次成形用キャビティで成形した一次成形品を型開の後取り出し二次成形用キャビティにインサートする構成としたので、キャビティをスライドする機構や回転する機構を用いることなく多層成形品を得ることができる効果を発現する。
また、二次成形用キャビティにインサートするとともに型閉じして、一次成形品とキャビティとの間に形成された隙間に溶融樹脂を充填するとともに、金型内に所定の形状の補用部品がキャビティ内に供給されて成形品と一体化されるので、製品デザインの自由度が向上し、複雑且つ、意匠性に優れた多層成形品が成形できる。
The multilayer molding method according to the present invention uses a multilayer molding apparatus including a pair of molds that are closed to form a plurality of cavities, and a plurality of injection units that are filled with molten resin in the plurality of cavities. A plurality of cavities can be formed simultaneously. Since the primary molded product molded in the primary molding cavity is taken out after mold opening and inserted into the secondary molding cavity, a multilayer molded product can be obtained without using a mechanism for sliding or rotating the cavity. The effect that can be expressed.
In addition, the mold is inserted into the secondary molding cavity and the mold is closed, and the molten resin is filled into the gap formed between the primary molded product and the cavity. Since it is supplied and integrated with the molded product, the degree of freedom in product design is improved, and a multilayer molded product that is complex and excellent in design can be molded.

さらに、複数の射出ユニットのいずれか一方の射出ユニットに、発泡性溶融樹脂を用いることとしたので、発泡層を備え、ソフト感を有して軽量化された成形品や、断熱性と遮音性に優れた多層成形品が成形できる。そして、補用部品をインサートしたので、発泡品のスワルマークを隠蔽して外観性に優れた多層成形品を成形できる。
二次成形用キャビティでは、一次成形品の表面と裏面の全面も若しくは周縁部に樹脂を充填して積層することとしたので、一次成形品との境界部にずれが生じることがなく意匠面が成形品の裏面側まで回り込んだ一体感のある外観的に優れた製品を得る。また、裏面側から樹脂を充填することで、意匠面にゲートの痕跡を無くすことができ外観不良を防止することができる。
Furthermore, since one of the multiple injection units is made of foamable molten resin, it is a molded product that has a foamed layer and has a soft feel and light weight, as well as heat insulation and sound insulation. It is possible to mold a multilayer molded product excellent in. And since the spare part was inserted, the swirl mark of the foamed product can be concealed and a multilayer molded product excellent in appearance can be formed.
In the secondary molding cavity, the entire surface of the primary molded product and the entire back surface or the peripheral part are filled with resin and laminated, so that the design surface does not shift at the boundary with the primary molded product. A product with an excellent appearance with a sense of unity that wraps around the back side of the molded product is obtained. In addition, by filling the resin from the back side, traces of the gate can be eliminated on the design surface, and appearance defects can be prevented.

以下、本発明の多層成形品の成形装置及び成形方法について実施の形態を説明するが、本発明はこれらに限定されて解釈されるべきものではなく、本発明の範囲を逸脱しない限りにおいて、当業者の知識に基づいて、種々の変更、改良、修正を加え得るものである。例えば、図面は、好適な本発明の実施の形態を表わすものであるが、本発明は図面に示された情報により制限されない。本発明を実施し又は検証する上では、本明細書中に記述されたものと同様の手段若しくは均等な手段が適用され得るが、好適な手段は以下に記述される手段である。なお、以下の記載において、一般的な技術、公知の技術、汎用の技術は省略している。   Hereinafter, embodiments of a molding apparatus and a molding method for a multilayer molded product according to the present invention will be described. However, the present invention should not be construed as being limited thereto, and the present invention is not limited to the scope of the present invention. Various changes, improvements, and modifications can be made based on the knowledge of the vendor. For example, the drawings show preferred embodiments of the present invention, but the present invention is not limited by the information shown in the drawings. In practicing or verifying the present invention, means similar to or equivalent to those described in the present specification can be applied, but preferred means are those described below. In the following description, general techniques, known techniques, and general-purpose techniques are omitted.

先ず、本発明の実施の形態について図面を参照しながら説明する。図1は、実施の形態を説明する多層成形装置の概要の説明図であり、図2は、一次成形用キャビティに補用部品をインサートした形態の成形工程を説明する図で、多層成形装置の要部を断面図で模式的に示してある。図3は、二次成形用キャビティに補用部品をインサートした形態の成形工程を説明する図で、多層成形装置の要部を断面図で模式的に示してある。   First, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of the outline of a multilayer molding apparatus for explaining an embodiment, and FIG. 2 is a diagram for explaining a molding process in which a spare part is inserted into a primary molding cavity. The main part is schematically shown in a sectional view. FIG. 3 is a diagram for explaining a molding process in which a spare part is inserted into the secondary molding cavity, and a main part of the multilayer molding apparatus is schematically shown in a sectional view.

図1に示すように、本発明の一実施例となる多層成形装置100は、図示しない型締装置と、一次成形用及び二次成形用の射出ユニット41、42と、金型3とにより基本構成される。金型3は、可動盤1に取付けられた可動型10と固定盤2に取付けられた固定型20とが型閉した状態で、一次成形用キャビティ7と二次成形用キャビティ8とを形成している。そして、符号51は二次成形用キャビティ8内にインサートされた一次成形品である。可動型10は固定型20に対して接離自在に型の開閉を行うことができる構成となっている。
なお、図示しない金型3の型開閉を行う型締装置は、公知のトグル式型締装置等が好適に用いられる。
As shown in FIG. 1, a multilayer molding apparatus 100 according to an embodiment of the present invention basically includes a mold clamping device (not shown), injection units 41 and 42 for primary molding and secondary molding, and a mold 3. Composed. The mold 3 forms a primary molding cavity 7 and a secondary molding cavity 8 with the movable mold 10 attached to the movable platen 1 and the fixed mold 20 attached to the fixed platen 2 closed. ing. Reference numeral 51 denotes a primary molded product inserted into the secondary molding cavity 8. The movable mold 10 is configured to be able to open and close the mold so as to be able to contact and separate from the fixed mold 20.
A known toggle type mold clamping device or the like is preferably used as the mold clamping device for opening and closing the mold 3 (not shown).

可動型10は、一次成形用の凸部11と二次成形用の凸部12と二つの凸部が形成され、可動型10のパーティング面13には二次成形用の樹脂流路14が設けられている。
一方、固定型20には、一次成形用のキャビティ面21と二次成形用のキャビティ面22と二つのキャビティ面が形成され、二つのキャビティに溶融樹脂を充填する樹脂流路23、24が設けられている。一次成形用の樹脂流路23はキャビティ面21に直接開口し、二次成形用の樹脂流路24は二次キャビティ面22に直接開口せず、二次キャビティ面22を迂回して設けた構成としている。そして、樹脂流路23、24の末端には、樹脂流路の開閉手段25、26がそれぞれ設けられている。
The movable mold 10 is formed with a convex part 11 for primary molding, a convex part 12 for secondary molding, and two convex parts. A resin flow path 14 for secondary molding is formed on the parting surface 13 of the movable mold 10. Is provided.
On the other hand, the fixed mold 20 is provided with a cavity surface 21 for primary molding, a cavity surface 22 for secondary molding, and two cavity surfaces, and resin channels 23 and 24 for filling the two cavities with molten resin are provided. It has been. The resin flow path 23 for primary molding opens directly to the cavity surface 21, and the resin flow path 24 for secondary molding does not open directly to the secondary cavity surface 22, and is provided around the secondary cavity surface 22. It is said. Resin channel opening / closing means 25 and 26 are provided at the ends of the resin channels 23 and 24, respectively.

また、固定型20の固定盤取付け面側には、一次成形用及び二次成形用の射出ユニット41、42を備え、一次成形用の射出ユニット41のノズル43は一次成形用の樹脂流路23に、二次成形用の射出ユニット42のノズル44は二次成形用の樹脂流路24に、溶融樹脂を供給する。
可動型10と固定型20とが型閉じした状態で、固定型20に設けた二次成形用の樹脂流路24と、可動型10に設けた二次成形用の樹脂流路14を介して二次成形用キャビティ8とが連通する構成となっている。
The fixed mold 20 includes injection units 41 and 42 for primary molding and secondary molding on the fixed plate mounting surface side, and the nozzle 43 of the injection unit 41 for primary molding has a resin flow path 23 for primary molding. In addition, the nozzle 44 of the injection unit 42 for secondary molding supplies the molten resin to the resin flow path 24 for secondary molding.
With the movable mold 10 and the fixed mold 20 closed, the secondary molding resin flow path 24 provided in the fixed mold 20 and the secondary molding resin flow path 14 provided in the movable mold 10 are interposed. The secondary molding cavity 8 is configured to communicate with each other.

次に、図2(a)〜(e)により成形方法について説明する。図2(a)〜(e)に示す成形方法は、一次成形用キャビティに補用部品をインサートして積層成形品を得る方法である。
図2(a)は、可動型10が型開された成形開始前の状態を示している。この状態では、樹脂流路の開閉手段25、26は閉じている。可動型10と固定型20とが型閉じした状態で、固定型20に設けた二次成形用の樹脂流路24と可動型10に設けた二次成形用の樹脂流路14を介して二次成形用キャビティと連通する構成となっている。
Next, the molding method will be described with reference to FIGS. The molding method shown in FIGS. 2 (a) to 2 (e) is a method for obtaining a laminated molded product by inserting a spare part into a primary molding cavity.
FIG. 2A shows a state before the start of molding in which the movable mold 10 is opened. In this state, the resin flow path opening and closing means 25 and 26 are closed. In a state where the movable mold 10 and the fixed mold 20 are closed, the second molding resin flow path 24 provided in the fixed mold 20 and the secondary molding resin flow path 14 provided in the movable mold 10 are used. It is configured to communicate with the next molding cavity.

そして、一次成形用の補用部品80が、補用部品の搬送手段5により可動型の一次成形用の凸部11に供給される。供給された補用部品80は、図示しない公知の例えば、吸着手段等により可動型10に固定される。
なお、補用部品80は金属又は樹脂或いは天然素材等で作られた成形体であって、成形品のデザインや補強等を目的としてインサートする。
補用部品80を一次成形用キャビティに供給する補用部品80の搬送手段5は、例えば、先端部に補用部品の着脱手段を備えた多関節式のロボット等、公知の手段を用いることで達成される。
Then, the auxiliary component 80 for primary molding is supplied to the convex portion 11 for primary molding by the auxiliary component conveying means 5. The supplied spare part 80 is fixed to the movable mold 10 by a known unillustrated suction means, for example.
The auxiliary component 80 is a molded body made of metal, resin, natural material, or the like, and is inserted for the purpose of designing or reinforcing the molded product.
The conveying means 5 of the auxiliary part 80 that supplies the auxiliary part 80 to the primary molding cavity is, for example, by using a known means such as an articulated robot having an auxiliary part attaching / detaching means at the tip. Achieved.

図2(b)は、可動型10が移動して型締めされ、可動型10と固定型20との間で一次成形用キャビティ7と二次成形用キャビティ8とが形成され、一次成形用キャビティ7に所定量の溶融樹脂を充填して一次成形品51を成形した状態を示している。成形開始後の初めての成形では、一次成形用の射出ユニット41から所定量の溶融樹脂を一次成形用キャビティ7にのみ充填し、二次成形用キャビティ8に溶融樹脂は充填しない。この時、樹脂流路の開閉手段25は開かれており、溶融樹脂がノズル43、樹脂流路23及び樹脂流路の開閉手段25を通って一次成形用キャビティ7に充填される。このようにして、補用部品80と一体となった一次成形品51を得る。   In FIG. 2B, the movable mold 10 is moved and clamped, and a primary molding cavity 7 and a secondary molding cavity 8 are formed between the movable mold 10 and the fixed mold 20, and the primary molding cavity. 7 shows a state where the primary molded product 51 is molded by filling a predetermined amount of molten resin. In the first molding after the start of molding, a predetermined amount of molten resin is filled only in the primary molding cavity 7 from the primary molding injection unit 41, and the secondary molding cavity 8 is not filled with molten resin. At this time, the resin flow path opening / closing means 25 is opened, and the molten resin is filled into the primary molding cavity 7 through the nozzle 43, the resin flow path 23 and the resin flow path opening / closing means 25. In this way, the primary molded product 51 integrated with the auxiliary component 80 is obtained.

図2(c)は、樹脂流路の開閉手段25が閉じられて可動型10が型開され、次いで、一次成形品51が一次成形用の凸部11から取り出されて二次成形用の凸部12にインサートされる状態を示している。一次成形品51は、図示しない慣用のハンドリング手段によって二次成形用の凸部12へインサートされるとともに、二次成形用の凸部12にインサートの後は、図示しない好適な固定手段等により可動型10に固定される。
また、一次成形品51を取り出した一次成形用の凸部11には、一次成形用の補用部品80が補用部品の搬送手段5により供給されて可動型10に固定される。
FIG. 2 (c) shows that the opening / closing means 25 for the resin flow path is closed and the movable mold 10 is opened, and then the primary molded product 51 is taken out from the convex portion 11 for primary molding, and the convex for secondary molding. The state inserted in the part 12 is shown. The primary molded product 51 is inserted into the convex part 12 for secondary molding by conventional handling means (not shown), and is movable by a suitable fixing means (not shown) after the insert into the convex part 12 for secondary molding. Fixed to the mold 10.
Further, a primary molding auxiliary part 80 is supplied to the primary molding convex portion 11 from which the primary molded product 51 is taken out by the auxiliary part conveying means 5 and is fixed to the movable mold 10.

図2(d)は、一次成形品51が二次成形用の凸部12に固定されて型締めされ、一次成形用キャビティ7と、一次成形品51と二次成形用キャビティ8とで形成された隙間それぞれに、同時に溶融樹脂を充填した状態を示している。
一次成形用キャビティ7では、樹脂流路の開閉手段25が開放される。そして、溶融樹脂がノズル43、樹脂流路23及び樹脂流路の開閉手段25を通って一次成形用キャビティ7に充填され、補用部品80がインサートされた一次成形品51を得る。
一方、二次成形キャビティ8では、樹脂流路の開閉手段26が開放される。そして、溶融樹脂がノズル44、樹脂流路24、樹脂流路の開閉手段26及び二次成形用の樹脂流路14を通って一次成形品51と二次成形用キャビティ8との隙間に充填され、一次成形品51と一体化された多層成形品52を得る。
In FIG. 2D, the primary molded product 51 is fixed to the convex portion 12 for secondary molding and clamped, and is formed by the primary molding cavity 7, the primary molded product 51, and the secondary molding cavity 8. Each of the gaps is filled with molten resin at the same time.
In the primary molding cavity 7, the resin flow path opening / closing means 25 is opened. Then, the molten resin is filled into the primary molding cavity 7 through the nozzle 43, the resin flow path 23, and the resin flow path opening / closing means 25, and the primary molded product 51 in which the auxiliary part 80 is inserted is obtained.
On the other hand, in the secondary molding cavity 8, the resin flow path opening / closing means 26 is opened. The molten resin is filled in the gap between the primary molded product 51 and the secondary molding cavity 8 through the nozzle 44, the resin flow path 24, the resin flow path opening / closing means 26, and the secondary molding resin flow path 14. Then, a multilayer molded product 52 integrated with the primary molded product 51 is obtained.

図2(e)は、樹脂流路の開閉手段25、26が閉じられ、可動型10が後退して型開した状態を示している。前述した慣用のハンドリング装置により積層成形品52は成形装置外へ取り出され、一次成形品51も同じく公知のハンドリング装置により二次成形用の凸部12へインサートされるとともに、可動型10に固定される。
以降、図2(d)と(e)の操作を繰り返すことによって、一次成形品51に樹脂が積層した多層成形品52を連続して得ることができる。
本発明における可動型10に設けた二次成形用の樹脂流路14と一次成形品51及び二次成形用キャビティ8の隙間との交差部であるゲートの形状は、図示しないが、タブゲート、フィルムゲート、ファンゲート等の周知の形態を用いることができる。そして、固定型20に設けた樹脂流路23、24はホットランナ等のランナレス手段を用いることが好ましく、樹脂流路23、24の末端に設けた樹脂流路の開閉手段25、26はバルブゲートやホットチップ等を用いることが好ましい。
FIG. 2E shows a state in which the opening / closing means 25 and 26 for the resin flow path are closed and the movable mold 10 is retracted and the mold is opened. The laminated molded product 52 is taken out of the molding device by the conventional handling device described above, and the primary molded product 51 is also inserted into the convex portion 12 for secondary molding by the known handling device and fixed to the movable mold 10. The
Thereafter, by repeating the operations shown in FIGS. 2D and 2E, a multilayer molded product 52 in which a resin is laminated on the primary molded product 51 can be continuously obtained.
Although the shape of the gate which is the intersection of the resin flow path 14 for secondary molding provided in the movable mold 10 of the present invention and the gap between the primary molded product 51 and the secondary molding cavity 8 is not shown, a tab gate, film Known forms such as a gate and a fan gate can be used. The resin flow paths 23 and 24 provided in the fixed mold 20 preferably use runner-less means such as a hot runner. The resin flow paths opening and closing means 25 and 26 provided at the ends of the resin flow paths 23 and 24 are valve gates. It is preferable to use a hot tip or the like.

図3により他の実施の形態を説明する。前述した実施の形態と同一のものには同じ番号を附した。図3(a)〜(e)に示す成形方法は、二次成形用キャビティに補用部品をインサートして積層成形品を得る方法である。
図3(a)〜(e)により成形方法について説明する。図3(a)は、可動型60が型開され補用部品90が供給された成形開始前の状態を示している。この状態では、樹脂流路の開閉手段25、26は閉じている。そして、可動型10と固定型20とが型閉じした状態で、固定型20に設けた二次成形用の樹脂流路24と可動型10に設けた二次成形用の樹脂流路14を介して二次成形用キャビティと連通する構成となっている。
Another embodiment will be described with reference to FIG. The same numbers are assigned to the same components as those in the above-described embodiment. The molding method shown in FIGS. 3A to 3E is a method of obtaining a laminated molded product by inserting a spare part into a secondary molding cavity.
The molding method will be described with reference to FIGS. FIG. 3A shows a state before the start of molding in which the movable mold 60 is opened and the auxiliary component 90 is supplied. In this state, the resin flow path opening and closing means 25 and 26 are closed. Then, with the movable mold 10 and the fixed mold 20 closed, the secondary molding resin flow path 24 provided in the fixed mold 20 and the secondary molding resin flow path 14 provided in the movable mold 10 are interposed. Thus, it is configured to communicate with the secondary molding cavity.

図3(b)は、可動型10が移動して型締めされ、可動型10と固定型20との間で一次成形用キャビティ7と二次成形用キャビティ8とが形成され、一次成形用キャビティ7に所定量の溶融樹脂を充填して一次成形品51を成形した状態を示している。成形開始後の初めての成形では、一次成形用の射出ユニット41から所定量の溶融樹脂を一次成形用のキャビティにのみ充填し、二次成形用キャビティ8には溶融樹脂を充填しない。この時、樹脂流路の開閉手段25は開かれており、溶融樹脂がノズル43、樹脂流路23及び樹脂流路の開閉手段25を通って一次成形用のキャビティに充填され一次成形品51を得る。   FIG. 3B shows that the movable mold 10 is moved and clamped, and a primary molding cavity 7 and a secondary molding cavity 8 are formed between the movable mold 10 and the fixed mold 20. 7 shows a state where the primary molded product 51 is molded by filling a predetermined amount of molten resin. In the first molding after the start of molding, a predetermined amount of molten resin is filled only from the primary molding injection unit 41 into the primary molding cavity, and the secondary molding cavity 8 is not filled with molten resin. At this time, the resin flow path opening / closing means 25 is open, and the molten resin passes through the nozzle 43, the resin flow path 23 and the resin flow path opening / closing means 25 to fill the primary molding cavity, and the primary molded product 51 is filled. obtain.

図3(c)は、樹脂流路の開閉手段25が閉じられて可動型10が型開され、次いで、一次成形品51が一次成形用の凸部11から取り出され、二次成形用の凸部12にインサートされた状態を示している。一次成形品51は、図示しない慣用のハンドリング手段によって二次成形用の凸部12へインサートされるとともに、二次成形用の凸部12にインサートの後は図示しない慣用の吸着手段等により可動型10に固定される。
また、二次成形品用キャビティ8に二次成形用の補用部品80が補用部品の搬送手段6により供給され、公知の手段により固定型10に固定される。
補用部品80を二次成形用キャビティ8に供給する補用部品の搬送手段6は、例えば、先端部に補用部品の着脱手段を備えた多関節式のロボット等、慣用の手段を用いることで達成される。
補用部品80は、金属又は樹脂或いは天然素材等で作られた成形体で、成形品のデザインや補強を目的としてインサートする。
FIG. 3 (c) shows that the opening / closing means 25 for the resin flow path is closed and the movable mold 10 is opened, and then the primary molded product 51 is taken out from the convex portion 11 for primary molding, and the convex for secondary molding is obtained. The state inserted in the part 12 is shown. The primary molded product 51 is inserted into the convex part 12 for secondary molding by a conventional handling means (not shown), and after the insert is inserted into the convex part 12 for secondary molding by a conventional suction means (not shown). 10 is fixed.
Further, a secondary molding auxiliary part 80 is supplied to the secondary molded product cavity 8 by the auxiliary part conveying means 6 and fixed to the fixed mold 10 by a known means.
As the auxiliary part conveying means 6 for supplying the auxiliary part 80 to the secondary molding cavity 8, for example, a conventional means such as an articulated robot having an auxiliary part attaching / detaching means at the tip is used. To be achieved.
The auxiliary part 80 is a molded body made of metal, resin, natural material, or the like, and is inserted for the purpose of designing or reinforcing the molded product.

図3(d)は、一次成形品51と補用部品80が二次成形用キャビティ8に固定されて型締めされ、一次成形用キャビティと、一次成形品51と補用部品80及び二次成形用キャビティとで形成された隙間それぞれに、同時に溶融樹脂を充填した状態を示している。
一次成形用キャビティ7では、樹脂流路の開閉手段25が開放される。そして、溶融樹脂がノズル43、樹脂流路23及び樹脂流路の開閉手段25を通って一次成形用のキャビティに充填され、一次成形品51を得る。
一方、二次成形用キャビティ8では、樹脂流路の開閉手段26が開放される。そして、溶融樹脂がノズル44、樹脂流路24、樹脂流路の開閉手段25及び二次成形用の樹脂流路14を通って一次成形品51と補用部品80との隙間に充填され、一次成形品51に樹脂を積層し、且つ補用部品80と一体化された多層成形品52を得る。
In FIG. 3D, the primary molded product 51 and the auxiliary part 80 are fixed to the secondary molding cavity 8 and clamped, and the primary molding cavity, the primary molded product 51, the auxiliary part 80, and the secondary molding are performed. It shows a state in which the gap formed by the cavity for use is filled with molten resin at the same time.
In the primary molding cavity 7, the resin flow path opening / closing means 25 is opened. Then, the molten resin passes through the nozzle 43, the resin flow path 23, and the resin flow path opening / closing means 25 and is filled into the primary molding cavity to obtain a primary molded product 51.
On the other hand, in the secondary molding cavity 8, the resin channel opening / closing means 26 is opened. The molten resin is filled into the gap between the primary molded product 51 and the auxiliary component 80 through the nozzle 44, the resin flow path 24, the resin flow path opening / closing means 25, and the resin flow path 14 for secondary molding. A resin is laminated on the molded product 51 and a multilayer molded product 52 integrated with the auxiliary component 80 is obtained.

図3(e)は、樹脂流路の開閉手段25、26が閉じられ、可動型10が後退して型開した状態を示している。前述した慣用のハンドリング装置により多層成形品52は成形装置外に取り出され、一次成形品51は二次成形用の凸部12にインサートされる。
また、多層成形品52を取り出した二次成形用キャビティ8に、二次成形用の補用部品80が補用部品の搬送手段6により供給されて固定型20に固定される。
以降、図3(d)と(e)の操作を繰り返すことで、一次成形品51に樹脂を積層し補用部品80と一体化した多層成形品52を連続して得ることができる。
FIG. 3E shows a state in which the opening / closing means 25 and 26 for the resin flow path are closed and the movable mold 10 is retracted and the mold is opened. The multilayer molded product 52 is taken out of the molding device by the conventional handling device described above, and the primary molded product 51 is inserted into the convex portion 12 for secondary molding.
Further, a secondary molding auxiliary part 80 is supplied to the secondary molding cavity 8 from which the multilayer molded product 52 has been taken out by the auxiliary part conveying means 6 and fixed to the stationary mold 20.
Thereafter, by repeating the operations shown in FIGS. 3D and 3E, the multilayer molded product 52 in which the resin is laminated on the primary molded product 51 and integrated with the auxiliary component 80 can be continuously obtained.

本発明における可動型10に設けた二次成形用の樹脂流路14と一次成形品51と二次成形用キャビティ8の隙間との交差部であるゲートの形状は、図示しないが、タブゲート、フィルムゲート、ファンゲート等の周知の形態を用いることができる。そして、固定型20に設けた樹脂流路23、24はホットランナ等のランナレス手段を用いることが好ましく、樹脂流路23、24の末端に設けた樹脂流路の開閉手段25、26はバルブゲートやホットチップ等を用いることが好ましい。   The shape of the gate which is the intersection of the resin flow path 14 for secondary molding provided in the movable mold 10 in the present invention, the gap between the primary molded product 51 and the secondary molding cavity 8 is not shown, but is not shown. Known forms such as a gate and a fan gate can be used. The resin flow paths 23 and 24 provided in the fixed mold 20 preferably use runner-less means such as a hot runner. The resin flow paths opening and closing means 25 and 26 provided at the ends of the resin flow paths 23 and 24 are valve gates. It is preferable to use a hot tip or the like.

次いで、本発明の実施形態における発泡成形について説明する。一次成形用の射出ユニット41又は二次成形用の射出ユニット42の両方又はいずれか一方に、発泡剤を混合してキャビティ内に射出充填することにより、発泡層を備え、ソフト感を有して軽量化され、断熱性や遮音性に優れた成形品を得ることができる。例えば、図2(d)において、一次成形用の射出ユニット41から発泡剤を混合した溶融樹脂が一次成形キャビティ内に充填されると、基材が発泡層となった多層成形品52を、二次成形用の射出ユニット42から発泡剤を混合した溶融樹脂が一次成形キャビティ内に充填されると、表層が発泡層となった多層成形品52を得ることができる。   Next, foam molding in the embodiment of the present invention will be described. By mixing the foaming agent into the injection unit 41 for primary molding or the injection unit 42 for secondary molding or any one of them and injection-filling the cavity, it has a foam layer and has a soft feeling. It is possible to obtain a molded product that is light in weight and excellent in heat insulation and sound insulation. For example, in FIG. 2D, when the molten resin mixed with the foaming agent from the injection unit 41 for primary molding is filled into the primary molding cavity, the multilayer molded product 52 in which the base material becomes a foamed layer is obtained. When the molten resin mixed with the foaming agent is filled from the injection unit 42 for the next molding into the primary molding cavity, the multilayer molded product 52 whose surface layer is a foamed layer can be obtained.

そして、溶融樹脂に混合する発泡剤には、化学発泡剤や物理発泡剤が用いられる。発泡成形の形態は、キャビティ容積と同量に発泡剤を混合した溶融樹脂を射出充填し、その後キャビティの容積を所定量拡大して発泡させるフルショット法が好ましい。また、キャビティ内に炭酸ガス等を所定の圧力で充満させ、キャビティ容積と同量に発泡剤を混合した溶融樹脂を射出充填するガスカウンタープレッシャー法をフルショット法に併用することは、発泡層の表面性を改善する点において好ましい。   And a chemical foaming agent and a physical foaming agent are used for the foaming agent mixed with molten resin. The form of foam molding is preferably a full shot method in which a molten resin mixed with a foaming agent in the same amount as the cavity volume is injected and filled, and then the volume of the cavity is expanded by a predetermined amount and foamed. In addition, the gas counter pressure method, in which a cavity is filled with carbon dioxide gas or the like at a predetermined pressure, and a molten resin mixed with a foaming agent in the same volume as the cavity volume is injected and filled in the full shot method, It is preferable in terms of improving surface properties.

なお、一次成形用キャビティ7に供給する補用部品80は製品表面の一部に露出する形状としたが、成形品の表面全体を覆う形状であっても良い。一方、二次成形用キャビティ8に供給する補用部品80は、成形品外表面全体を覆う形状としたが、成形品の表面を部分的に覆う形状であっても良い。
従来の一次成形品を金型に残して二次成形型と型閉じする方法では一次成形品の裏面に樹脂を充填して積層成形することができないが、図1に示すように本発明の可動型10のパーティング面13に設けた二次成形用の樹脂流路14部をコア側に延長することで、一次成形品の裏面全部若しくは周縁部を積層成形する構成とした。
The auxiliary part 80 supplied to the primary molding cavity 7 has a shape exposed on a part of the product surface, but may have a shape covering the entire surface of the molded product. On the other hand, the auxiliary part 80 supplied to the secondary molding cavity 8 is configured to cover the entire outer surface of the molded product, but may be configured to partially cover the surface of the molded product.
With the conventional method of leaving the primary molded product in the mold and closing the mold with the secondary mold, the back surface of the primary molded product cannot be filled with resin, but as shown in FIG. The resin flow path portion 14 for secondary molding provided on the parting surface 13 of the mold 10 is extended to the core side, so that the entire back surface or peripheral edge portion of the primary molded product is laminated.

前述した補用部品の材料として、金属材料においては鉄鋼やステンレス等の鉄鋼材料、アルミニウム合金や銅合金等の非鉄金属材料が、樹脂材料においてはポリプロピレン樹脂等の熱可塑性樹脂やユリア樹脂等の熱硬化性樹脂が、また、天然素材においては綿や絹等の繊維、皮革、紙、木材及び石材等公知の素材が好適に用いられる。   As materials for the above-mentioned spare parts, steel materials such as steel and stainless steel, non-ferrous metal materials such as aluminum alloy and copper alloy are used as metal materials, and heat such as thermoplastic resins such as polypropylene resins and urea resins are used as resin materials. As the curable resin, and natural materials, known materials such as fibers such as cotton and silk, leather, paper, wood, and stone are preferably used.

上記説明した発明の実施の形態においては、一次成形品と二次成形品が略相似の形状としたが、これに限るものではなく、成形品に肉厚の違いを持った形状であってもよい。また、成形品52を箱型の容器状としたが、板状に積層された多層成形品であっても良い。
そして、金型の構造はキャビティ部にインローを有しない平押型としたが、インローを有する半押込型を用いることもできる。
In the embodiment of the invention described above, the primary molded product and the secondary molded product have substantially similar shapes. However, the present invention is not limited to this, and even if the molded product has a difference in thickness. Good. Further, although the molded product 52 is a box-shaped container, it may be a multilayer molded product laminated in a plate shape.
The mold structure is a flat pressing mold that does not have an inlay in the cavity, but a half-pressing mold having an inlay can also be used.

以上説明したように、従来のスライド型を用いた多層成形品の成形方法では、一次成形を行ない、一旦金型を開いて一次成形品をスライドさせ、次いで二次成形を行って成形品を得ていた。このため、一次成形と二次成形とを同時に行うことができなかった。そして、従来の金型を回転させる多層成形品の成形方法では、一次成形と二次成形を同時に行うことができたが、成形サイクル毎に回転させて移動させなければならず、成形サイクルに無駄な時間が発生していた。また、従来の多層成形用の金型は、構造が複雑で高価でもあった。さらに、成形品の意匠面にゲートの痕跡が残る上、樹脂の境界部でのずれなどにより外観が不良となる。
本発明による多層成形装置及び多層成形方法は、金型に一次成形用と二次成形用の二つのキャビティを設けて、一次成形品を二次成形用キャビティにインサートすること及び一次成形品の表面と裏面の全面若しくは周縁部を樹脂で積層することにより上記の問題を解決した。
そして、本発明の多層成形装置及び多層成形方法を用いて多層成形品を成形することができた。
As described above, in the conventional method for forming a multilayer molded product using a slide mold, primary molding is performed, the mold is opened once, the primary molded product is slid, and then secondary molding is performed to obtain a molded product. It was. For this reason, primary molding and secondary molding could not be performed simultaneously. In the conventional method for forming a multilayer molded product by rotating a mold, primary molding and secondary molding can be performed at the same time. However, it is necessary to rotate and move each molding cycle. A long time has occurred. Moreover, the conventional mold for multilayer molding has a complicated structure and is expensive. Furthermore, the trace of the gate remains on the design surface of the molded product, and the appearance becomes poor due to a shift at the boundary of the resin.
A multilayer molding apparatus and a multilayer molding method according to the present invention provide a mold with two cavities for primary molding and secondary molding, and inserts the primary molded product into the secondary molding cavity and the surface of the primary molded product. The above problem was solved by laminating the entire surface or peripheral edge of the back surface with resin.
And the multilayer molded product could be shape | molded using the multilayer molding apparatus and multilayer molding method of this invention.

実施の形態を説明する多層成形装置の概要の説明図である。It is explanatory drawing of the outline | summary of the multilayer shaping | molding apparatus explaining embodiment. 一次成形用キャビティに補用部品をインサートした形態の成形工程を説明する図であるIt is a figure explaining the shaping | molding process of the form which inserted the auxiliary part in the cavity for primary shaping | molding. 二次成形用キャビティに補用部品をインサートした形態の成形工程を説明する図である。It is a figure explaining the shaping | molding process of the form which inserted the auxiliary component in the cavity for secondary shaping | molding.

符号の説明Explanation of symbols

1 可動盤
2 固定盤
5、6 補用部品の搬送手段
10 可動型
11、12 凸部
13 パーティング面
14 二次成形用の樹脂流路
20 固定型
21 一次成形用キャビティ面
22 二次成形用キャビティ面
23、24 樹脂流路
25、26 樹脂流路の開閉手段
41 一次成形用射出ユニット
42 二次成形用射出ユニット
51 一次成形品
52 多層成形品
80 補要部品
DESCRIPTION OF SYMBOLS 1 Movable platen 2 Fixed platen 5, 6 Means for conveyance of auxiliary parts 10 Movable die 11, 12 Convex portion 13 Parting surface 14 Resin flow path for secondary molding 20 Fixed die 21 Cavity surface for primary molding 22 For secondary molding Cavity surface 23, 24 Resin channel 25, 26 Opening / closing means for resin channel 41 Primary molding injection unit 42 Secondary molding injection unit 51 Primary molded product 52 Multilayer molded product 80 Supplementary parts

Claims (6)

型閉じして複数のキャビティを形成する固定型と可動型とからなる一対の金型と、該金型を開閉する型締ユニットと、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えて、一種類以上の異なる溶融樹脂を金型内に射出充填して多層成形品を成形する多層成形装置において、
前記複数のキャビティが、一次成形品を成形する一次成形用キャビティと、インサートされた前記一次成形品の表面と裏面の全面、若しくは周縁部を積層可能とする二次成形用キャビティとで構成されると共に、前記可動型のパーティング面に前記二次成形用キャビティへ連通する樹脂流路が設けられ、前記一次成形品と二次成形品とを同時に得るようにしたことを特徴とする多層成形装置。
A pair of molds composed of a fixed mold and a movable mold that are closed to form a plurality of cavities; a mold clamping unit that opens and closes the molds; and a plurality of injection units that fill the plurality of cavities with molten resin; In a multilayer molding apparatus for molding a multilayer molded product by injecting and filling one or more different molten resins into a mold,
Wherein the plurality of cavities is constituted by a primary molding cavity for molding the primary molded article, the insert has been the primary molded article surface and the entire back surface, or a secondary molding cavity to enable stacking periphery A multilayer molding apparatus characterized in that a resin flow path communicating with the secondary molding cavity is provided on the movable parting surface to obtain the primary molded product and the secondary molded product simultaneously. .
型閉じして複数のキャビティを形成する固定型と可動型とからなる一対の金型と、該金型を開閉する型締ユニットと、前記複数のキャビティに溶融樹脂を充填する複数の射出ユニットとを備えた多層成形装置を用いて多層成形品を成形する多層成形方法において、
一次成形用キャビティに溶融樹脂を供給して一次成形品を成形した後、金型を開いて前記一次成形品を二次成形用キャビティにインサートすると共に、前記一次成形品と二次成形用キャビティとの隙間に前記可動型のパーティング面に設けた樹脂流路を介して溶融樹脂を充填して、前記一次成形品の表面と裏面の全面、若しくは周縁部を積層して二次成形品を成形するときに、一次成形品を同時に成形するようにしたことを特徴とする多層成形方法。
A pair of molds composed of a fixed mold and a movable mold that are closed to form a plurality of cavities; a mold clamping unit that opens and closes the molds; and a plurality of injection units that fill the plurality of cavities with molten resin; In a multilayer molding method for molding a multilayer molded article using a multilayer molding apparatus comprising:
After molding the primary molded product by supplying a molten resin into the primary molding cavity, with the mold is opened to insert the primary molded article in the secondary molding cavity, said primary molded product and the secondary molding cavity The molten resin is filled in the gap through the resin flow path provided on the movable parting surface, and the entire surface of the primary molded product and the entire back surface, or the peripheral edge are laminated to form a secondary molded product. A multilayer molding method characterized in that a primary molded product is molded at the same time .
前記複数の射出ユニットの両方又はいずれか一方の射出ユニットに発泡性溶融樹脂を用い、前記キャビティへ充填後に発泡させることを特徴とする請求項2に記載の多層成形方法。   The multilayer molding method according to claim 2, wherein foamable molten resin is used for both or any one of the plurality of injection units, and foaming is performed after filling the cavity. 金属及び樹脂又は天然素材等で予め形成された補用部品を、前記複数のキャビティのいずれか一方にインサートすることを特徴とする請求項2又は請求項3のいずれかに記載の多層成形方法。   4. The multilayer molding method according to claim 2, wherein a spare part previously formed of a metal and a resin or a natural material is inserted into one of the plurality of cavities. 前記補用部品は一次成形用キャビティにインサートされ、一次成形品と一体化されたことを特徴とする請求項4に記載の多層成形方法。   5. The multilayer molding method according to claim 4, wherein the auxiliary part is inserted into a primary molding cavity and integrated with the primary molded product. 前記補用部品は二次成形用キャビティにインサートされ、一次成形品と前記補用部品との間に形成された隙間に溶融樹脂を充填して一体化されたことを特徴とする請求項4に記載の多層成形方法。   5. The auxiliary part is inserted into a cavity for secondary molding, and a gap formed between the primary molded part and the auxiliary part is filled with a molten resin and integrated. The multilayer molding method described.
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