JP4527994B2 - Reinforced panel molding method, foam core molding method, and panel structure - Google Patents

Reinforced panel molding method, foam core molding method, and panel structure Download PDF

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JP4527994B2
JP4527994B2 JP2004029676A JP2004029676A JP4527994B2 JP 4527994 B2 JP4527994 B2 JP 4527994B2 JP 2004029676 A JP2004029676 A JP 2004029676A JP 2004029676 A JP2004029676 A JP 2004029676A JP 4527994 B2 JP4527994 B2 JP 4527994B2
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正俊 小林
大樹 森泉
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Honda Motor Co Ltd
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本発明は、例えば自動車のボンネットやルーフ等に用いられる強化パネルの成形方法、及びその成形方法によって成形されるパネルの構造に関する。   The present invention relates to a method for forming a reinforced panel used for, for example, an automobile bonnet or a roof, and a structure of a panel formed by the forming method.

従来、自動車のボンネットやルーフ等に用いられるパネル構造として、繊維強化プラスチック(FRP:Fiber Reinforced Plastics)をパネル状にした構造や、パネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層を形成した構造が知られている(例えば、特許文献1参照。)。   Conventional panel structures used for automobile bonnets, roofs, etc., are made of fiber reinforced plastics (FRP: Fiber Reinforced Plastics), and a fiber reinforced plastic layer is formed on at least one surface of a panel-shaped foam core. Such a structure is known (for example, see Patent Document 1).

これらパネル構造の繊維強化プラスチックは、炭素繊維やガラス繊維材料、アラミド繊維材料等の高強度・高弾性の強化繊維材料と樹脂とで構成されており、その成形方法としてはRTM法(Resin Transfer Molding)が主流である。このRTM法は、樹脂が浸透していない所謂ドライの強化繊維材料を、必要に応じて発泡コアと重ね合わせて、所定の金型やバックフィルム内に密封し、その金型内部またはバックフィルム内部を真空引きすると共に樹脂を注入して、強化繊維材料に樹脂を拡散、含浸及び硬化させて強化パネルを成形するものである。
特開2001−260238号公報
These panel-structured fiber reinforced plastics are composed of high-strength, high-elasticity reinforced fiber materials such as carbon fiber, glass fiber material, and aramid fiber material and resin. The molding method is RTM (Resin Transfer Molding). ) Is the mainstream. In this RTM method, a so-called dry reinforcing fiber material into which a resin does not permeate is overlapped with a foam core as necessary and sealed in a predetermined mold or back film, and the inside of the mold or back film And a resin is injected to diffuse, impregnate and cure the resin in the reinforcing fiber material to form a reinforced panel.
JP 2001-260238 A

しかし、上記RTM法は、樹脂を金型やバックフィルムの末端部まで行き渡らせる必要があり、比較的低い真空圧下で行われる樹脂の拡散及び含浸に時間がかかるため、成形工程のハイサイクル化が難かしいといった問題がある。   However, in the above RTM method, it is necessary to spread the resin to the end of the mold or back film, and it takes time to diffuse and impregnate the resin under a relatively low vacuum pressure. There is a problem that it is difficult.

また、発泡コアに強化繊維材料を重ね合わせて所定の金型内やバックフィルム内に密封して真空引きする場合も、金型内やバックフィルム内を高真空圧にすると発泡コア部が破損するおそれがあるので、低真空圧下で樹脂の拡散及び含浸を行う必要がある。そのため、この場合も成形工程のハイサイクル化が困難である。   In addition, when a reinforcing fiber material is overlaid on a foam core and sealed in a predetermined mold or back film and vacuumed, the foam core part will be damaged if the inside of the mold or back film is subjected to a high vacuum pressure. Therefore, it is necessary to perform diffusion and impregnation of the resin under a low vacuum pressure. Therefore, also in this case, it is difficult to increase the cycle of the molding process.

また、樹脂グレードを選択し、樹脂を急激に硬化又は固化させてハイサイクル化を図ることも考えられるが、この場合、樹脂の硬化又は固化が周囲から始まり固化または硬化時に収縮するため、パネル内に空洞が発生してしまい、採用することができない。   It is also conceivable to select a resin grade and rapidly cure or solidify the resin to achieve a high cycle. In this case, however, the resin cures or solidifies starting from the surroundings and shrinks when solidified or cured. In this case, a cavity is generated and cannot be employed.

そこで本発明は、上記の問題点に鑑み、ハイサイクルで強化パネル成形することが出来るパネル成形方法と、そのパネル成形方法に用いることのできる発泡コアの成形方法、及び、そのパネル成形方法で成形されるパネル構造を提供することを課題とする。   Accordingly, in view of the above problems, the present invention provides a panel molding method capable of forming a reinforced panel at a high cycle, a foam core molding method that can be used in the panel molding method, and a panel molding method. It is an object of the present invention to provide a panel structure.

上記課題を解決するために請求項1記載の発明は、所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する注入口と、上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有する上型及び下型を、上記所定の閉じ状態よりも上下型間が近接した状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、上記未発泡部形成用ブロックを没入させると共に上下型間を離間させて上記所定の閉じ状態にし、上記注入口から上型及び突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴としている。 In order to solve the above problem, the invention according to claim 1 is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, An upper mold and a lower mold having an injection port for injecting a foam material and a block for forming an unfoamed portion that can be projected and retracted between the upper and lower molds are closer to each other than the predetermined closed state. The foamed material is injected from the inlet with the unfoamed part forming block protruding, or the foamed material forming block is projected after the foaming material starts to be injected from the inlet. The first foaming step of foaming the foam material and the unfoamed portion forming block are immersed, and the upper and lower molds are separated to the predetermined closed state, and the upper mold and the protruding state of the upper mold and the protruding state are not formed. There is a foam forming block. To have space by injecting a foamed material is characterized in that a second blowing step of blowing the foam material.

また、請求項記載の発明は、所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する第1注入口と上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する第2注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記第1注入口から発泡材料を注入するか、或いは、上記第1注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、上記未発泡部形成用ブロックを没入させ、上記第2注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴としている。 The invention according to claim 2 is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and a foam material is injected between the upper and lower molds. A second injection port having a first injection port and a block for forming an unfoamed portion configured to be movable in and out between the upper and lower molds, and injecting a foam material between the upper and lower molds into the block for forming the unfoamed portion The foamed material is injected from the first injection port in a state where the upper mold and the lower mold provided with the above-mentioned closed state and the unfoamed portion forming block protrudes, or the first mold A first foaming step of foaming the foamed material by causing the unfoamed part forming block to project after injecting the foamed material from the injection port, and immersing the unfoamed part forming block from the second inlet. Space where there was an unfoamed part forming block in the protruding state By injecting a foamed material is characterized in that a second blowing step of blowing the foam material.

また、請求項3に記載の発明は、上記請求項1または請求項2に記載の発泡コア成形方法において、上記第1発泡工程で、第1注入口に加えて第2注入口からも発泡材料を注入することを特徴としている。 Further, the invention according to claim 3 is the foam core forming method according to claim 1 or 2, wherein the foaming material is formed from the second inlet in addition to the first inlet in the first foaming step. It is characterized by injecting .

また、請求項4記載の発明は、所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に対して出没可能に構成された未発泡部形成用のブロックを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、上記未発泡部形成用ブロックを没入させ、上記注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴としている。 The invention according to claim 4 is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foamed core shape, and can be projected and retracted between the upper and lower molds. An upper mold and a lower mold having a configured block for forming an unfoamed portion and provided with an inlet for injecting a foam material between the upper and lower molds into the unfoamed portion forming block are in the predetermined closed state. The foaming material is injected from the injection port with the unfoamed portion forming block protruding, or the foaming material is started to be injected from the injection port and then the unfoamed portion forming block is protruded. a first foaming step of foaming the foaming material, the unfoamed portion were formed for blocking the immersive, the foam material is injected into the space unfoamed portion forming block state output collision the inlet or we were present And a second foaming process for foaming the foamed material It is characterized in that was.

また、請求項5記載の発明は、上記請求項1〜4のいずれかに記載の発泡コア成形方法において、上記第1発泡工程または第2発泡工程のいずれか一方の発泡工程で、発泡材料にかえて未発泡樹脂を注入することを特徴としている。 Further, the invention according to claim 5 is the foam core forming method according to any one of claims 1 to 4, wherein the foam material is formed in one of the first foaming step and the second foaming step. Instead, unfoamed resin is injected .

また、請求項6記載の発明は、上記請求項1〜5のいずれかに記載の発泡コア成形方法において、上記第1発泡工程と第2発泡工程の少なくとも一方の工程で、発泡材料を発泡させる際に、発泡材料の発泡形状のアスペクト比を制御する発泡制御手段によって、上下方向に長い楕円体形状に発泡させることを特徴としている。 The invention according to claim 6 is the foamed core molding method according to any one of claims 1 to 5 , wherein the foamed material is foamed in at least one of the first foaming step and the second foaming step. At this time, the foam material is characterized by being foamed into an ellipsoid shape that is long in the vertical direction by a foam control means for controlling the aspect ratio of the foam shape of the foam material .

また、請求項7記載の発明は、パネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成る強化パネルの成形方法であって、
熱硬化性樹脂または熱可塑性樹脂を含浸させたシート状の強化繊維材料を、変形可能な状態で、請求項1〜6のいずれかに記載の発泡コア成形方法で成形された芯材となる発泡コアの繊維強化プラスチック層を形成する面に対向させて配置し、その強化繊維材料及び発泡コアを所定の上型及び下型によって加圧し、強化繊維材料及び発泡コアを型形状に馴染ませて所望の形状とするプリフォーム工程と、強化繊維材料に含浸している熱硬化性樹脂または熱可塑性樹脂の硬化・固化反応が進行可能な温度に設定されている所定の上型及び下型で、上記プリフォーム工程を経た強化繊維材料及び発泡コアを加圧し、強化繊維材料に含浸している熱硬化性樹脂または熱可塑性樹脂を硬化または固化して強化繊維材料を発泡コアに圧着するプレス工程とを備えたことを特徴としている。
The invention according to claim 7 is a method for forming a reinforced panel in which a fiber-reinforced plastic layer is formed on at least one surface of a panel-shaped foam core,
Foam that becomes a core material molded by the foam core molding method according to any one of claims 1 to 6, in a deformable state, a sheet-like reinforcing fiber material impregnated with a thermosetting resin or a thermoplastic resin Place the core facing the surface on which the fiber reinforced plastic layer is formed, press the reinforced fiber material and foam core with a predetermined upper mold and lower mold, and adjust the reinforced fiber material and foam core to the mold shape as desired. A predetermined upper mold and a lower mold that are set to a temperature at which a curing process and a solidification reaction of a thermosetting resin or a thermoplastic resin impregnated in a reinforcing fiber material can proceed; reinforcing fiber material through the preform step and foam core is pressurized, the press step of crimping the reinforcing fiber material cured or solidified to reinforcing fiber material with a thermosetting resin or thermoplastic resin is impregnated into the foam core It is characterized by comprising a.

また、請求項8記載の発明は、請求項7に記載の強化パネル成形方法において、上記プリフォーム工程で、上型及び下型による加圧と共に、上型及び下型の少なくとも一方の型に設けられた吸引孔からのエア吸引による減圧、または上型及び下型の少なくとも一方の型に設けられた吹き付け孔からのエア吹き付けによる加圧を行うことを特徴としている。 The invention according to claim 8 is the reinforced panel molding method according to claim 7, wherein in the preform step, the pressure is applied to at least one of the upper mold and the lower mold together with pressurization by the upper mold and the lower mold. The pressure is reduced by air suction from the suction holes formed, or the pressure is applied by blowing air from the spray holes provided in at least one of the upper mold and the lower mold .

また、請求項9記載の発明は、請求項1〜6のいずれかに記載の発泡コア成形方法で成形されたパネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成るパネル構造であって、上記発泡コアの発泡形状が所定方向に長い楕円体となっていることを特徴としている。 The invention according to claim 9 is a panel in which a fiber reinforced plastic layer is formed on at least one surface of a panel-like foam core molded by the foam core molding method according to any one of claims 1 to 6. The structure is characterized in that the foamed shape of the foamed core is an ellipsoid that is long in a predetermined direction .

また、請求項10記載の発明は、請求項1〜6のいずれかに記載の発泡コア成形方法で成形されたパネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成るパネル構造であって、上記発泡コアには、その外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されていることを特徴としている。 The invention according to claim 10 is a panel in which a fiber reinforced plastic layer is formed on at least one surface of a panel-like foam core molded by the foam core molding method according to any one of claims 1 to 6. The structure is characterized in that an unfoamed portion extending from one surface to the other surface is formed in the foam core other than the outer peripheral edge thereof .

また、請求項11記載の発明は、請求項1〜6のいずれかに記載の発泡コア成形方法で成形されたパネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成るパネル構造であって、上記発泡コアの発泡形状が所定方向に長い楕円体となっていると共に、発泡コアには、その外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されていることを特徴としている。 The invention described in claim 11 is a panel in which a fiber-reinforced plastic layer is formed on at least one surface of a panel-shaped foam core molded by the foam core molding method according to any one of claims 1-6. The foamed core has an elongated ellipsoid shape in a predetermined direction, and the foamed core has an unfoamed portion extending from one surface to the other, in addition to the outer peripheral edge. It is characterized in that there.

請求項1記載の発明によれば、所定の閉じ状態よりも上下型間が近接した状態にすると共に未発泡部形成用ブロックを突出させた状態にして行う第1発泡工程と、上下型間を離間させて所定の閉じ状態すると共に未発泡部形成用ブロックを没入させた状態にして行う第2発泡工程とに分けて発泡材料を発泡させているため、第1発泡工程で発泡した部分と第2発泡工程で発泡した部分の境界面に発泡材料が発泡しない未発泡部が形成される。そのため、この発泡コアの一方の面から他方の面にわたる未発泡部によって、発泡コアのプレス方向の強度が高くなる。なお、第2発泡工程は、第1発泡工程よりも上下型間を離間させて行っているので、上型が存在していた空間を介して注入口から未発泡部形成用ブロックが存在していた空間に発泡材料が注入されるAccording to the first aspect of the present invention, the first foaming step is performed between the upper and lower molds in a state where the upper and lower molds are closer to each other than the predetermined closed state and the unfoamed portion forming block is projected. Since the foamed material is foamed separately from the second foaming process in which the foamed material is foamed separately from the second foaming process in which the unfoamed part forming block is immersed and separated from the first foaming process. An unfoamed portion where the foamed material does not foam is formed at the boundary surface between the portions foamed in the two foaming process. Therefore, the strength of the foam core in the press direction is increased by the unfoamed portion extending from one surface of the foam core to the other surface. The second foaming step is performed with the upper and lower molds spaced apart from the first foaming step, so that there is an unfoamed part forming block from the inlet through the space where the upper mold was present. Foam material is injected into the open space .

請求項2記載の発明によれば、未発泡部形成用ブロックを突出させた状態で行う第1発泡工程と、未発泡部形成用ブロックを没入させた状態で行う第2発泡工程とに分けて発泡材料を発泡させているため、第1発泡工程で発泡した部分と第2発泡工程で発泡した部分の境界面に発泡材料が発泡しない未発泡部が形成される。そのため、この発泡コアの一方の面から他方の面にわたる未発泡部によって、発泡コアのプレス方向の強度が高くなり、請求項1記載の強化パネル成形方法に用いるのに適した発泡コアを成形することができる。なお、第1発泡工程と第2発泡工程とで発泡材料を注入する注入口を変えているので、第1発泡工程ではブロックに干渉せずに発泡材料を注入することができ、第2発泡工程では第1発泡工程で発泡した部分に干渉せずに発泡材料を注入することができるAccording to invention of Claim 2 , it divides into the 1st foaming process performed in the state which made the unfoamed part formation block protrude, and the 2nd foaming process performed in the state where the unfoamed part formation block was immersed. Since the foam material is foamed, an unfoamed portion where the foam material does not foam is formed at the boundary surface between the portion foamed in the first foaming step and the portion foamed in the second foaming step. Therefore, the strength in the press direction of the foam core is increased by the unfoamed portion extending from one surface of the foam core to the other surface, and the foam core suitable for use in the reinforced panel molding method according to claim 1 is molded. be able to. Since the injection port for injecting the foam material is changed between the first foaming step and the second foaming step, the foaming material can be injected without interfering with the block in the first foaming step. in can be injected foam material without interfering with the foamed portion in the first expansion step.

請求項3記載の発明によれば、第1発泡工程において、第1注入口に加えて第2注入口からも発泡材料を注入するので、上下型間に効率的に発泡材料を行き渡らせることができ、第1発泡工程の発泡注入時間を短縮することができるAccording to invention of Claim 3, in a 1st foaming process, since a foaming material is inject | poured from a 2nd injection port in addition to a 1st injection port, a foaming material can be spread efficiently between upper and lower molds. It is possible to shorten the foam injection time in the first foaming step .

請求項4記載の発明によれば、第1発泡工程と第2発泡工程との両方の工程で、未発泡部形成用ブロックに形成された注入口から発泡材料を注入するので、上型に注入口を形成する必要がなく、構成が簡単になってコストを低減化できる。   According to the fourth aspect of the present invention, the foam material is injected from the injection port formed in the unfoamed portion forming block in both the first foaming step and the second foaming step. It is not necessary to form an inlet, and the configuration is simplified and the cost can be reduced.

請求項5記載の発明によれば、上記第1発泡工程または第2発泡工程のいずれか一方の発泡工程で、発泡材料にかえて未発泡樹脂を注入するため、成形される発泡コアの未発泡部分の割合が増す。したがって、より高強度の発泡コアを成形することができるAccording to invention of Claim 5 , in order to inject | pour unfoamed resin instead of a foam material in either one of the said 1st foaming process or the 2nd foaming process, it is unfoamed of the foaming core shape | molded The proportion of parts increases. Therefore, a foam core having a higher strength can be formed .

請求項6記載の発明によれば、第1発泡工程と第2発泡工程の少なくとも一方の工程で発泡材料を発泡させる際に、発泡制御手段によって発泡材料の発泡形状が上下方向に長い楕円体形状になるので、発泡コアのプレス方向の強度が高くなり、請求項1記載の強化パネル成形方法に用いるのに適した発泡コアを成形することができるAccording to invention of Claim 6, when foaming a foam material by at least one process of a 1st foaming process and a 2nd foaming process, the foaming shape of a foaming material is an ellipsoid shape with a long vertical direction by a foam control means. Therefore, the strength of the foam core in the press direction is increased, and a foam core suitable for use in the reinforced panel molding method according to claim 1 can be molded .

請求項7記載の発明によれば、強化繊維材料及び発泡コアを型形状に馴染ませるプリフォーム工程と、樹脂を硬化または固化して強化繊維材料を発泡コアに圧着するプレス工程とで強化パネルを成形するため、低真空圧下での樹脂の拡散及び含浸処理を行う必要がなく、成形工程のハイサイクル化が可能となるAccording to the seventh aspect of the present invention , the reinforcing panel is formed by a preform process in which the reinforcing fiber material and the foamed core are adapted to the mold shape, and a press process in which the resin is cured or solidified and the reinforcing fiber material is pressure-bonded to the foamed core. Since molding is performed, it is not necessary to perform diffusion and impregnation of the resin under a low vacuum pressure, and the molding process can be made high cycle .

請求項8記載の発明によれば、プリフォーム工程で、上型及び下型による加圧と共に、上型及び下型の少なくとも一方の型に設けられた吸引孔からのエア吸引による減圧、または上型及び下型の少なくとも一方の型に設けられた吹き付け孔からのエア吹き付けによる加圧を行うため、より確実かつ迅速に強化繊維材料等を型形状に馴染ませることができるAccording to the eighth aspect of the present invention, in the preforming process, in addition to the pressurization by the upper mold and the lower mold, the decompression by the air suction from the suction hole provided in at least one of the upper mold and the lower mold, or the upper mold Since pressurization is performed by air blowing from a blowing hole provided in at least one of the mold and the lower mold, the reinforcing fiber material or the like can be adapted to the mold shape more reliably and quickly .

請求項9記載の発明によれば、発泡制御手段によって発泡材料の発泡形状が上下方向に長い楕円体形状になるので、発泡コアのプレス方向の強度が高くなり、請求項1記載の強化パネル成形方法に用いるのに適した発泡コアを成形することができるAccording to the ninth aspect of the invention, since the foamed shape of the foamed material becomes an ellipsoidal shape that is long in the vertical direction by the foam control means, the strength of the foamed core in the press direction is increased, and the reinforced panel molding according to claim 1 A foam core suitable for use in the method can be molded .

請求項10記載の発明によれば、発泡コアの外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されているので、発泡コアのパネル厚方向の強度が高くなり、プレスに強い芯材として利用することができるAccording to the invention of claim 10, since the non-foamed portion extending from one surface to the other surface is formed in addition to the outer peripheral edge of the foam core, the strength of the foam core in the panel thickness direction is increased, and the press It can be used as a strong core material .

請求項11記載の発明によれば、発泡コアの発泡形状が所定方向に長い楕円体となっていると共に、発泡コアの外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されているので、発泡コアのパネル厚方向の強度が高くなり、プレスに強い芯材として利用することができるAccording to the invention of claim 11, the foamed shape of the foamed core is an ellipsoid that is long in a predetermined direction, and an unfoamed portion extending from one surface to the other surface is formed in addition to the outer peripheral edge of the foamed core. Therefore, the strength of the foam core in the panel thickness direction is increased, and it can be used as a core material that is strong against pressing .

請求項14記載の発明によれば、発泡コアの発泡形状が所定方向に長い楕円体となっていると共に、発泡コアの外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されているので、発泡コアのパネル厚方向の強度が高くなり、プレスに強い芯材として利用することができる。   According to the invention described in claim 14, the foamed shape of the foam core is an ellipsoid that is long in a predetermined direction, and an unfoamed portion extending from one surface to the other surface is formed in addition to the outer peripheral edge of the foam core. Therefore, the strength of the foam core in the panel thickness direction is increased, and it can be used as a core material that is strong against pressing.

以下、本発明に係る強化パネルの成形方法の実施形態について、図1〜図5を参照して説明する。   Hereinafter, an embodiment of a method for forming a reinforced panel according to the present invention will be described with reference to FIGS.

図1(a)を参照して、1は、発泡コアを成形するための発泡コア成形金型であり、この発泡コア成形金型1は、上型2と下型3とで構成されている。上型2は、図示しない駆動源によって下型3に対して接離可能となっており、所定の閉じ状態(図1(d),(e)の状態)でのこの上下型2,3間の空間形状は、成形したい発泡コアの形状となっている。   Referring to FIG. 1A, reference numeral 1 denotes a foam core molding die for molding a foam core. The foam core molding die 1 is composed of an upper die 2 and a lower die 3. . The upper mold 2 can be brought into and out of contact with the lower mold 3 by a drive source (not shown), and the upper mold 2 is placed between the upper and lower molds 2 and 3 in a predetermined closed state (the states shown in FIGS. 1D and 1E). The space shape is the shape of the foam core to be molded.

上型2には、図示しない外部の発泡材料供給源から上下型2,3間に発泡材料を注入するための注入口2aと、後述する未発泡部形成用のブロック4を収容するためのブロック収容穴2bとが形成されている。   The upper mold 2 is a block for accommodating an injection port 2a for injecting foam material between the upper and lower molds 2 and 3 from an external foam material supply source (not shown), and a block 4 for forming an unfoamed portion described later. A housing hole 2b is formed.

ブロック4は、上下型2,3間に対して出没可能に構成されており、具体的には、上記ブロック収容穴2bに収容されている没入位置(図1(d),(e)の位置)とブロック収容穴2bから突出している突出位置(図1(a)〜(c)の位置)との間で移動可能に構成されている。ブロック4は、その没入位置においては、ブロック4の下端面の高さが上型2の型面の高さと一致するようになっており、その突出位置においては、ブロック4の下端面が下型の型面近傍に位置するようになっている。また、ブロック4は、シリンダのピストンロッド4aに接続されており、そのシリンダの駆動によって出没される。   The block 4 is configured to be able to protrude and retract between the upper and lower molds 2 and 3. Specifically, the block 4 is inserted into the block receiving hole 2 b (the positions shown in FIGS. 1D and 1E). ) And a protruding position protruding from the block accommodation hole 2b (the positions shown in FIGS. 1A to 1C). The block 4 is configured such that the lower end surface of the block 4 matches the height of the mold surface of the upper mold 2 at the retracted position, and the lower end surface of the block 4 is the lower mold at the protruding position. It is located near the mold surface. The block 4 is connected to a piston rod 4a of the cylinder, and is retracted by driving the cylinder.

下型3の背面3aには、超音波発振器5(発泡制御手段)が固設されており、この超音波発振器5の駆動により、上下型2,3間に超音波振動を伝達することができる。   An ultrasonic oscillator 5 (foaming control means) is fixed on the back surface 3 a of the lower mold 3, and ultrasonic vibrations can be transmitted between the upper and lower molds 2 and 3 by driving the ultrasonic oscillator 5. .

この発泡コア成形金型1で発泡コアを成形する場合、図1(a)に示すように、上型2及び下型3を上記所定の閉じ状態よりも上下型2,3間が近接した状態にし、未発泡部形成用ブロック4を突出させた状態にする。そして、図1(b)に示すように、注入口2aから、ポリオールとイソシアネートを混合したポリウレタンフォームの発泡材料を注入すると共に、超音波発振器5を駆動させる(第1発泡工程)。これにより、ブロック4が存在している空間以外の空間に発泡材料が行き渡って発泡が開始し、超音波発振器5からの超音波振動によってその発泡形状のアスペクト比が制御される(図1(c)参照)。具体的には、発泡材料の発泡形状は、後述するプリフォーム工程及びプレス工程におけるプレス方向に長い楕円体形状となる。ここで、上下型2,3間に注入された発泡材料のうち、上下型2,3及びブロック4近傍の発泡材料は、発泡せずにスキン層となる。   When molding a foam core with the foam core molding die 1, as shown in FIG. 1 (a), the upper die 2 and the lower die 3 are closer to each other between the upper and lower dies 2 and 3 than the predetermined closed state. The unfoamed part forming block 4 is projected. And as shown in FIG.1 (b), while inject | pouring the foaming material of the polyurethane foam which mixed the polyol and isocyanate from the injection port 2a, the ultrasonic oscillator 5 is driven (1st foaming process). As a result, the foam material spreads to a space other than the space where the block 4 exists, and foaming starts, and the aspect ratio of the foam shape is controlled by ultrasonic vibration from the ultrasonic oscillator 5 (FIG. 1 (c). )reference). Specifically, the foamed shape of the foamed material is an ellipsoidal shape that is long in the pressing direction in a preform process and a press process described later. Here, among the foamed material injected between the upper and lower molds 2 and 3, the foamed material in the vicinity of the upper and lower molds 2 and 3 and the block 4 does not foam but becomes a skin layer.

第1発泡工程における発泡が終わると、続いて、図1(d)に示すように、上型2を下型3から離間させて、上記所定の閉じ状態にすると共に、シリンダを駆動させてピストンロッド4aを介してブロック4を上型2に没入させる。そして、注入口2aから、上型2及び突出状態のブロック4が存在していた空間に発泡材料を注入すると共に、超音波発振器5を駆動させる(第2発泡工程)。これにより、第1発泡工程において上型2及びブロック4が存在していた空間に発泡材料が行き渡って発泡が開始し、超音波発振器5からの超音波振動によってその発泡形状のアスペクト比が制御される(図1(e)参照)。具体的には、発泡材料の発泡形状は、後述するプリフォーム工程及びプレス工程におけるプレス方向に長い楕円体形状となる。ここで、上下型2,3間に注入された発泡材料のうち、上下型2,3及び上記第1発泡工程で形成されたスキン層近傍の発泡材料は、発泡せずにスキン層となる。そして、第1発泡工程及び第2発泡工程で形成されたスキン層によって、発泡コアCの一方の面から他方の面にわたる未発泡部が構成される。   When foaming in the first foaming process is finished, as shown in FIG. 1 (d), the upper mold 2 is moved away from the lower mold 3 to be in the predetermined closed state, and the cylinder is driven to drive the piston. The block 4 is immersed in the upper mold 2 through the rod 4a. Then, the foam material is injected from the injection port 2a into the space where the upper mold 2 and the protruding block 4 existed, and the ultrasonic oscillator 5 is driven (second foaming step). As a result, the foam material spreads into the space where the upper mold 2 and the block 4 existed in the first foaming step, and foaming starts, and the aspect ratio of the foam shape is controlled by ultrasonic vibration from the ultrasonic oscillator 5. (See FIG. 1 (e)). Specifically, the foamed shape of the foamed material is an ellipsoidal shape that is long in the pressing direction in a preform process and a press process described later. Here, among the foam materials injected between the upper and lower molds 2 and 3, the foam materials in the vicinity of the upper and lower molds 2 and 3 and the skin layer formed in the first foaming step become a skin layer without foaming. And the unfoamed part ranging from one surface of the foam core C to the other surface is constituted by the skin layer formed in the first foaming step and the second foaming step.

このようにして成形された発泡コアCは、発泡コア成形金型1から取り出され、続いて、図2(a)に示すように、その上面C1側と下面C2側との両方に、熱硬化性樹脂を含浸させたシート状の炭素繊維材料6が、予め多層化した状態で配置される。発泡コアCの下面C2に配置される炭素繊維材料6の発泡コアCに対向する面と反対側の面は、製品に組み込まれた際に露出する面、即ち意匠面であり、この面にはピンホール対策用の樹脂7が塗布または配置される。なお、上記シート状の炭素繊維材料6は、一枚であっても、複数枚を重ねたものであっても良い。 Thus foam core C which is molded is removed from the foam core molding die 1, Then, as shown in FIG. 2 (a), both the upper surface C 1 side and the lower surface C 2 side, A sheet-like carbon fiber material 6 impregnated with a thermosetting resin is arranged in a multilayered state in advance. The surface opposite to the surface facing the foam core C of the carbon fiber material 6 disposed on the lower surface C 2 of the foam core C is a surface exposed when incorporated in a product, that is, a design surface. The resin 7 for pinhole measures is applied or arranged. The sheet-like carbon fiber material 6 may be a single sheet or a plurality of stacked sheets.

続いて、この発泡コアC及び炭素繊維材料6が、図2(b)に示すように、プリフォーム型8を構成する上型9及び下型10のうち、下型10の上に載置される。そして、上型9を下型10方向に移動させ、常温かつ低プレス圧で加圧し、炭素繊維材料6と発泡コアCとをプリフォーム型8形状に馴染ませる(プリフォーム工程)。なお、ここでは常温でプレスしているが、次工程のプレス工程で行う熱プレスに問題が生じない範囲で、熱硬化性樹脂の硬化反応が進行可能な温度でプレスしても良い。   Subsequently, the foam core C and the carbon fiber material 6 are placed on the lower mold 10 among the upper mold 9 and the lower mold 10 constituting the preform mold 8 as shown in FIG. The Then, the upper mold 9 is moved in the direction of the lower mold 10 and pressurized at room temperature and with a low press pressure, so that the carbon fiber material 6 and the foamed core C are adapted to the shape of the preform mold 8 (preform process). In addition, although it presses at normal temperature here, you may press at the temperature which the hardening reaction of a thermosetting resin can advance in the range which does not produce a problem in the heat press performed at the next press process.

次に、プリフォーム工程によって一体化した炭素繊維材料6及び発泡コアCは、プリフォーム型8から取り出され、熱プレス型11を構成する上型12及び下型13のうち、下型13の上に載置される。そして、上型12を下型13方向に移動させ、熱硬化性樹脂の硬化反応が進行可能な温度、ここでは140℃かつ高プレス圧で加圧し、炭素繊維材料6に含浸している熱硬化性樹脂を硬化・固化して炭素繊維材料6を発泡コアCに確実に圧着する(プレス工程)。これにより、発泡コアCの両面に繊維強化プラスチック層が形成された強化パネルが形成される。   Next, the carbon fiber material 6 and the foamed core C integrated by the preforming process are taken out from the preform mold 8, and the upper mold 12 and the lower mold 13 constituting the hot press mold 11 are above the lower mold 13. Placed on. Then, the upper mold 12 is moved in the direction of the lower mold 13 and the thermosetting resin is impregnated in the carbon fiber material 6 by being pressurized at a temperature at which the curing reaction of the thermosetting resin can proceed, here 140 ° C. and high press pressure. The hardened resin is cured and solidified, and the carbon fiber material 6 is securely pressure-bonded to the foamed core C (pressing process). Thereby, the reinforcement panel in which the fiber reinforced plastic layer was formed on both surfaces of the foam core C is formed.

次に、他の実施形態に係る発泡コアの成形方法について説明する。上記説明と同じ構成については同符号を用いて説明する。   Next, a method for forming a foam core according to another embodiment will be described. The same components as those described above will be described using the same reference numerals.

図3(a)を参照して、1は、発泡コアを成形するための発泡コア成形金型であり、この発泡コア成形金型1は、上型2と下型3とで構成されている。上型2は、図示しない駆動源によって下型3に対して接離可能となっており、この上下型2,3間の所定の閉じ状態(図3(a)〜(e)の状態)での空間形状は、成形したい発泡コアの形状となっている。   Referring to FIG. 3A, reference numeral 1 denotes a foam core molding die for molding a foam core. This foam core molding die 1 is composed of an upper die 2 and a lower die 3. . The upper mold 2 can be brought into and out of contact with the lower mold 3 by a driving source (not shown), and is in a predetermined closed state between the upper and lower molds 2 and 3 (states shown in FIGS. 3A to 3E). The space shape is the shape of the foam core to be molded.

上型2には、図示しない外部の発泡材料供給源から上下型2,3間に発泡材料を注入するための第1注入口2aと、後述する未発泡部形成用のブロック4を収容するためのブロック収容穴2bとが形成されている。   The upper mold 2 accommodates a first injection port 2a for injecting a foam material between the upper and lower molds 2 and 3 from an external foam material supply source (not shown), and a block 4 for forming an unfoamed portion described later. The block housing hole 2b is formed.

ブロック4は、上下型2,3間に対して出没可能に構成されており、具体的には、上記ブロック収容穴2bに収容されている没入位置(図3(d),(e)の位置)とブロック収容穴2bから突出している突出位置(図3(a)〜(c)の位置)との間で移動可能に構成されている。ブロック4は、その没入位置においては、ブロック4の下端面の高さが上型2の型面の高さと一致するようになっており、その突出位置においては、ブロック4の下端面が下型の型面近傍に位置するようになっている。また、ブロック4は、シリンダのピストンロッド4aに接続されており、そのシリンダの駆動によって出没される。そして、ブロック4及びピストンロッド4aの軸中心には、図示しない外部の発泡材料供給源から上下型2,3間に発泡材料を注入するための第2注入口4bが形成されている。   The block 4 is configured to be able to protrude and retract between the upper and lower molds 2 and 3. Specifically, the block 4 is inserted into the block receiving hole 2 b (the positions shown in FIGS. 3D and 3E). ) And a protruding position protruding from the block accommodation hole 2b (the positions shown in FIGS. 3A to 3C). The block 4 is configured such that the lower end surface of the block 4 matches the height of the mold surface of the upper mold 2 at the retracted position, and the lower end surface of the block 4 is the lower mold at the protruding position. It is located near the mold surface. The block 4 is connected to a piston rod 4a of the cylinder, and is retracted by driving the cylinder. A second injection port 4b for injecting a foam material between the upper and lower molds 2 and 3 from an external foam material supply source (not shown) is formed at the axial center of the block 4 and the piston rod 4a.

下型3の背面3aには、超音波発振器5(発泡制御手段)が固設されており、この超音波発振器5の駆動により、上下型2,3間に超音波振動を伝達することができる。   An ultrasonic oscillator 5 (foaming control means) is fixed on the back surface 3 a of the lower mold 3, and ultrasonic vibrations can be transmitted between the upper and lower molds 2 and 3 by driving the ultrasonic oscillator 5. .

この発泡コア成形金型1で発泡コアを成形する場合、図3(a)に示すように、上型2及び下型3を上記所定の閉じ状態にし、未発泡部形成用ブロック4を突出させた状態にする。そして、図3(b)に示すように、第1注入口2aから、ポリオールとイソシアネートを混合したポリウレタンフォームの発泡材料を注入すると共に、超音波発振器5を駆動させる(第1発泡工程)。これにより、ブロック4が存在している空間以外の空間に発泡材料が行き渡って発泡が開始し、超音波発振器5からの超音波振動によってその発泡形状のアスペクト比が制御される(図3(c)参照)。具体的には、発泡材料の発泡形状は、後述するプリフォーム工程及びプレス工程におけるプレス方向に長い楕円体形状となる。ここで、上下型2,3間に注入された発泡材料のうち、上下型2,3及びブロック4近傍の発泡材料は、発泡せずにスキン層となる。   When the foam core is molded by the foam core molding die 1, as shown in FIG. 3A, the upper mold 2 and the lower mold 3 are placed in the predetermined closed state, and the unfoamed portion forming block 4 is projected. To the state. And as shown in FIG.3 (b), while blowing the foam material of the polyurethane foam which mixed the polyol and isocyanate from the 1st injection port 2a, the ultrasonic oscillator 5 is driven (1st foaming process). As a result, the foam material spreads into a space other than the space where the block 4 exists and foaming starts, and the aspect ratio of the foam shape is controlled by ultrasonic vibration from the ultrasonic oscillator 5 (FIG. 3 (c). )reference). Specifically, the foamed shape of the foamed material is an ellipsoidal shape that is long in the pressing direction in a preform process and a press process described later. Here, among the foamed material injected between the upper and lower molds 2 and 3, the foamed material in the vicinity of the upper and lower molds 2 and 3 and the block 4 does not foam but becomes a skin layer.

第1発泡工程における発泡が終わると、続いて、図3(d)に示すように、シリンダを駆動させてピストンロッド4aを介してブロック4を上型2に没入させる。そして、第2注入口4bから、突出状態のブロック4が存在していた空間に発泡材料を注入すると共に、超音波発振器5を駆動させる(第2発泡工程)。これにより、第1発泡工程においてブロック4が存在していた空間に発泡材料が行き渡って発泡が開始し、超音波発振器5からの超音波振動によってその発泡形状のアスペクト比が制御される(図3(e)参照)。具体的には、発泡材料の発泡形状は、後述するプリフォーム工程及びプレス工程におけるプレス方向に長い楕円体形状となる。ここで、上下型2,3間に注入された発泡材料のうち、上下型2,3及び上記第1発泡工程で形成されたスキン層近傍の発泡材料は、発泡せずにスキン層となる。そして、第1発泡工程及び第2発泡工程で形成されたスキン層によって、発泡コアCの一方の面から他方の面にわたる未発泡部が構成される。   When foaming in the first foaming step is finished, subsequently, as shown in FIG. 3 (d), the cylinder is driven and the block 4 is immersed in the upper mold 2 via the piston rod 4a. Then, the foaming material is injected from the second injection port 4b into the space where the projecting block 4 was present, and the ultrasonic oscillator 5 is driven (second foaming step). Thereby, foaming material spreads in the space where the block 4 existed in the first foaming step, and foaming starts, and the aspect ratio of the foamed shape is controlled by ultrasonic vibration from the ultrasonic oscillator 5 (FIG. 3). (See (e)). Specifically, the foamed shape of the foamed material is an ellipsoidal shape that is long in the pressing direction in a preform process and a press process described later. Here, among the foam materials injected between the upper and lower molds 2 and 3, the foam materials in the vicinity of the upper and lower molds 2 and 3 and the skin layer formed in the first foaming step become a skin layer without foaming. And the unfoamed part ranging from one surface of the foaming core C to the other surface is constituted by the skin layer formed in the first foaming step and the second foaming step.

なお、この発泡コアの成形方法では、第1発泡工程において、第1注入口2aのみから発泡材料を注入しているが、第1注入口2aに加えて第2注入口4bからも発泡材料を注入するようにしても良い。或いは、第1発泡工程において、第2注入口4bのみから発泡材料を注入するようにしても良く、この場合、上型2に第1注入口2aを形成しなくても良い。   In this foam core molding method, the foam material is injected only from the first inlet 2a in the first foaming step, but the foam material is also injected from the second inlet 4b in addition to the first inlet 2a. You may make it inject | pour. Alternatively, in the first foaming step, the foam material may be injected only from the second injection port 4b. In this case, the first injection port 2a may not be formed in the upper mold 2.

また、上記実施形態では、発泡材料、すなわち、未発泡樹脂に発泡材料を混合したものを上下型2,3間に注入しているが、第1発泡工程または第2発泡工程のいずれか一方の発泡工程で、発泡材料にかえて未発泡樹脂を注入するようにしても良い。これにより、成形される発泡コアCの未発泡部分の割合が増し、より高強度の発泡コアCを成形することができる。   Moreover, in the said embodiment, although foamed material, ie, the thing which mixed foamed material with unfoamed resin, is inject | poured between the upper-and-lower molds 2 and 3, either one of a 1st foaming process or a 2nd foaming process In the foaming process, an unfoamed resin may be injected instead of the foamed material. Thereby, the ratio of the unfoamed part of the foaming core C to be molded is increased, and the foaming core C having higher strength can be molded.

なお、上記実施形態では、上記発泡コア成形の第1発泡工程及び第2発泡工程で、超音波発振器5で超音波振動を付与しつつ発泡材料を発泡させているが、必要とする発泡コアCの強度によっては、超音波振動を付与しなくてもよい。この場合、図4(a)に示すような断面形状の発泡コアCが成形される。或いは、上記第1発泡工程と第2発泡工程のどちらか一方の工程で、超音波発振器5で超音波振動を付与しつつ発泡材料を発泡させても良い。   In the above-described embodiment, the foaming material is foamed while applying ultrasonic vibration by the ultrasonic oscillator 5 in the first foaming process and the second foaming process of the foamed core molding. Depending on the strength, the ultrasonic vibration may not be applied. In this case, a foam core C having a cross-sectional shape as shown in FIG. Alternatively, the foamed material may be foamed while applying ultrasonic vibration by the ultrasonic oscillator 5 in one of the first foaming process and the second foaming process.

また、上記実施形態では、上記発泡コア成形を、ブロック4を突出させて行う第1発泡工程とブロック4を没入させて行う第2発泡工程とに分けて行っているが、必要とする発泡コアCの強度によっては、ブロック4を没入させた状態で1工程で発泡を行っても良い。この場合、図4(b)に示すように、上下方向に長い楕円体形状に発泡した発泡コアCが成形される。   Moreover, in the said embodiment, although the said foaming core shaping | molding is performed separately in the 1st foaming process performed by making the block 4 protrude, and the 2nd foaming process performed by immersing the block 4, the foam core required Depending on the strength of C, foaming may be performed in one step with the block 4 immersed. In this case, as shown in FIG. 4B, a foam core C foamed in an elliptical shape that is long in the vertical direction is formed.

また、上記実施形態では、上記発泡コア成形を、ブロック4を突出させて行う第1発泡工程とブロック4を没入させて行う第2発泡工程とに分けて行うことにより、発泡コア内に未発泡部を形成し、発泡コアCの強度を高めているが、他の方法によって発泡コアCの強度を高めても良い。例えば、図5(a)に示すように、上型14と下型15との間に、上型14及び下型15のうち少なくとも一方(図では両方)に接するように高強度の樹脂ブロック16を配置して上型14及び下型15を閉じた状態にし、注入口14aから発泡材料を注入して発泡材料を発泡させることにより、高強度の発泡コアCを成形しても良い(図5(b)参照)。   Moreover, in the said embodiment, the said foam core shaping | molding is divided into the 1st foaming process performed by making the block 4 protrude, and the 2nd foaming process performed by immersing the block 4, and it is unfoamed in a foam core. However, the strength of the foam core C may be increased by other methods. For example, as shown in FIG. 5A, a high-strength resin block 16 is in contact with at least one (both in the drawing) of the upper mold 14 and the lower mold 15 between the upper mold 14 and the lower mold 15. Is placed in a state where the upper mold 14 and the lower mold 15 are closed, and the foam material is foamed by injecting the foam material from the injection port 14a to form the high-strength foam core C (FIG. 5). (See (b)).

なお、上記実施形態のプリフォーム工程では、上型2及び下型3による加圧のみによって、強化繊維材料6や発泡コアCを型2,3形状に馴染ませて所望の形状にしているが、本発明はこれに限定されるものではない。例えば、上型2及び下型3による加圧と共に、上型2及び下型3の少なくとも一方の型に設けられた吸引孔からのエア吸引による減圧、または上型及び下型の少なくとも一方の型に設けられた吹き付け孔からのエア吹き付けによる加圧を行うようにしても良い。これによれば、より確実かつ迅速に強化繊維材料等を型形状に馴染ませることができる。   In the preform process of the above embodiment, the reinforcing fiber material 6 and the foamed core C are adjusted to the shapes of the molds 2 and 3 only by pressurization by the upper mold 2 and the lower mold 3, and are in a desired shape. The present invention is not limited to this. For example, in addition to pressurization by the upper mold 2 and the lower mold 3, pressure reduction by air suction from a suction hole provided in at least one of the upper mold 2 and the lower mold 3, or at least one mold of the upper mold and the lower mold You may make it perform the pressurization by the air spraying from the spraying hole provided in this. According to this, a reinforced fiber material etc. can be made to adapt to a type | mold shape more reliably and rapidly.

また、上記実施形態のプリフォーム工程及びプレス工程は、発泡コアCを用いない、繊維強化プラスチックから成る強化パネルの成形方法にも適用することができる。すなわち、熱硬化性樹脂を含浸させたシート状の強化繊維材料を、変形可能かつ予め多層化した状態で、所定の上型及び下型によって低プレス圧で加圧し、強化繊維材料を型形状に馴染ませて所望の形状とするプリフォーム工程と、強化繊維材料に含浸している熱硬化性樹脂の硬化反応が進行可能な温度に設定されている所定の上型及び下型で、上記プリフォーム工程を経た強化繊維材料を加圧し、強化繊維材料に含浸している熱硬化性樹脂を硬化または固化するプレス工程とによって、繊維強化プラスチックから成る強化パネルを成形することができる。なお、上記シート状の炭素繊維材料は、一枚であっても、複数枚を重ねたものであっても良い。   Moreover, the preform process and press process of the said embodiment are applicable also to the shaping | molding method of the reinforced panel which does not use the foam core C and which consists of fiber reinforced plastics. That is, a sheet-like reinforcing fiber material impregnated with a thermosetting resin is deformed and pre-multilayered, and is pressed with a predetermined upper mold and a lower mold with a low press pressure, thereby forming the reinforcing fiber material into a mold shape. The above preform is a predetermined upper mold and a lower mold that are set to a temperature at which a curing process of the thermosetting resin impregnated in the reinforcing fiber material can proceed, and a preform process to adjust to a desired shape. A reinforced panel made of fiber reinforced plastic can be formed by pressurizing the reinforced fiber material that has undergone the process and curing or solidifying the thermosetting resin impregnated in the reinforced fiber material. The sheet-like carbon fiber material may be a single sheet or a stack of a plurality of sheets.

また、上記実施形態では、発泡材料としてポリウレタンフォームを用いているが、本発明はこれに限定されるものではなく、例えば、発泡ポリオレフィンや発泡ポリスチレン、発泡アクリルゴム等であっても良い。   Moreover, in the said embodiment, although the polyurethane foam is used as a foaming material, this invention is not limited to this, For example, foaming polyolefin, foaming polystyrene, foaming acrylic rubber, etc. may be sufficient.

なお、上記実施形態では、熱硬化性樹脂を含浸させた炭素繊維材料6を用いているが、本発明はこれに限定されるものではない。例えば、熱可塑性樹脂を含浸させたものを用いても良い。以下に、図2を参照して具体的な方法について説明する。   In the above embodiment, the carbon fiber material 6 impregnated with the thermosetting resin is used, but the present invention is not limited to this. For example, a material impregnated with a thermoplastic resin may be used. Hereinafter, a specific method will be described with reference to FIG.

まず、図2(a)に示すように、発泡コア成形金型1から取り出された発泡コアCの上面C1側と下面C2側との両方に、熱可塑性樹脂を含浸させたシート状の炭素繊維材料6が、予め多層化した状態で配置される。そして、発泡コアCの下面C2に配置される炭素繊維材料6の発泡コアCに対向する面と反対側の面にはピンホール対策用の樹脂7が塗布または配置される。 First, as shown in FIG. 2 (a), both the upper surface C 1 side and the lower surface C 2 side of the foam core C taken out of the foam core molding die 1, sheet impregnated with a thermoplastic resin The carbon fiber material 6 is arranged in a multilayered state in advance. Then, on the surface opposite to the foam core C opposite to the surface of the carbon fiber material 6 arranged on the lower surface C 2 of the foam core C resin 7 for pinhole protection is applied or arranged.

続いて、この発泡コアC及び炭素繊維材料6が、図2(b)に示すように、プリフォーム型8を構成する上型9及び下型10のうち、下型10の上に載置される。そして、上型9を下型10方向に移動させ、所定の型温度及び材料温度かつ低プレス圧で加圧し、炭素繊維材料6と発泡コアCとをプリフォーム型8形状に馴染ませる(プリフォーム工程)。ここでいう所定の型温度は、炭素繊維材料6に含浸している熱可塑性樹脂が、結晶性の熱可塑性樹脂の場合にはその融点以下の型温度であれば良く、非結晶性の熱可塑性樹脂の場合にはそのガラス転移点以下の型温度であれば良い。また、所定の材料温度、すなわち発泡コアC及び炭素繊維材料6の温度は、炭素繊維材料6に含浸している熱可塑性樹脂が、結晶性の熱可塑性樹脂の場合にはその融点以上の材料温度であれば良く、非結晶性の熱可塑性樹脂の場合にはそのガラス転移点以上の材料温度であれば良い。この材料温度は、プリフォーム工程の前に発泡コアC及び炭素繊維材料6をヒータ等で加温することにより実現する。   Subsequently, the foam core C and the carbon fiber material 6 are placed on the lower mold 10 among the upper mold 9 and the lower mold 10 constituting the preform mold 8 as shown in FIG. The Then, the upper mold 9 is moved in the direction of the lower mold 10 and pressed at a predetermined mold temperature, material temperature and low press pressure, so that the carbon fiber material 6 and the foamed core C are adapted to the shape of the preform mold 8 (preform). Process). The predetermined mold temperature here may be a mold temperature not higher than the melting point when the thermoplastic resin impregnated in the carbon fiber material 6 is a crystalline thermoplastic resin. In the case of a resin, the mold temperature may be lower than the glass transition point. Further, the predetermined material temperature, that is, the temperature of the foam core C and the carbon fiber material 6 is a material temperature equal to or higher than the melting point when the thermoplastic resin impregnated in the carbon fiber material 6 is a crystalline thermoplastic resin. In the case of an amorphous thermoplastic resin, the material temperature may be higher than the glass transition point. This material temperature is realized by heating the foam core C and the carbon fiber material 6 with a heater or the like before the preforming process.

次に、プリフォーム工程によって一体化した炭素繊維材料6及び発泡コアCは、プリフォーム型8から取り出され、プレス型11を構成する上型12及び下型13のうち、下型13の上に載置される。そして、上型12を下型13方向に移動させ、所定の型温度及び材料温度かつ高プレス圧で加圧し、炭素繊維材料6に含浸してい熱可塑性樹脂を硬化・固化して炭素繊維材料6を発泡コアCに確実に圧着する(プレス工程)。ここでいう所定の型温度は、炭素繊維材料6に含浸している熱可塑性樹脂が、結晶性の熱可塑性樹脂の場合にはその融点以下の型温度であれば良く、非結晶性の熱可塑性樹脂の場合にはそのガラス転移点以下の型温度であれば良い。また、所定の材料温度、すなわち発泡コアC及び炭素繊維材料6の温度は、炭素繊維材料6に含浸している熱可塑性樹脂が、結晶性の熱可塑性樹脂の場合にはその融点以上の材料温度であれば良く、非結晶性の熱可塑性樹脂の場合にはそのガラス転移点以上の材料温度であれば良い。この材料温度は、プリフォーム工程の前に発泡コアC及び炭素繊維材料6をヒータ等で加温することにより実現する。   Next, the carbon fiber material 6 and the foamed core C integrated by the preforming process are taken out from the preform mold 8 and placed on the lower mold 13 among the upper mold 12 and the lower mold 13 constituting the press mold 11. Placed. Then, the upper mold 12 is moved in the lower mold 13 direction, pressurized at a predetermined mold temperature, material temperature and high press pressure, and the carbon fiber material 6 is impregnated with the thermoplastic resin which is hardened and solidified to solidify the carbon fiber material 6. Is securely crimped to the foam core C (pressing process). The predetermined mold temperature here may be a mold temperature not higher than the melting point when the thermoplastic resin impregnated in the carbon fiber material 6 is a crystalline thermoplastic resin. In the case of a resin, the mold temperature may be lower than the glass transition point. Further, the predetermined material temperature, that is, the temperature of the foam core C and the carbon fiber material 6 is a material temperature equal to or higher than the melting point when the thermoplastic resin impregnated in the carbon fiber material 6 is a crystalline thermoplastic resin. In the case of an amorphous thermoplastic resin, the material temperature may be higher than the glass transition point. This material temperature is realized by heating the foam core C and the carbon fiber material 6 with a heater or the like before the preforming process.

また、上記実施形態では、強化繊維材料として炭素繊維材料を用いたが、ガラス繊維材料や、アラミド等の樹脂系繊維材料を用いても良い。   In the above embodiment, the carbon fiber material is used as the reinforcing fiber material. However, a glass fiber material or a resin fiber material such as aramid may be used.

なお、本発明は上記実施形態に限定されるものではなく、必要に応じて種々変更することが可能である。   In addition, this invention is not limited to the said embodiment, A various change is possible as needed.

本発明の実施形態に係る発泡コア成形工程を示す断面図Sectional drawing which shows the foaming core molding process which concerns on embodiment of this invention 本発明の実施形態に係るパネル成形工程を示す断面図Sectional drawing which shows the panel formation process which concerns on embodiment of this invention 他の実施形態に係るパネル成形工程を示す断面図Sectional drawing which shows the panel formation process which concerns on other embodiment. 他の実施形態に係る発泡コアを示す断面図Sectional drawing which shows the foam core which concerns on other embodiment. 他の実施形態に係る発泡コア成形工程を示す断面図Sectional drawing which shows the foam core formation process which concerns on other embodiment.

符号の説明Explanation of symbols

1 発泡コア成形金
4 未発泡部形成用ブロック
5 超音波発振器
6 炭素繊維材料
C 発泡コア
DESCRIPTION OF SYMBOLS 1 Foam core molding metal 4 Unfoamed part formation block 5 Ultrasonic oscillator 6 Carbon fiber material C Foam core

Claims (14)

所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する注入口と、上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有する上型及び下型を、上記所定の閉じ状態よりも上下型間が近接した状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、
上記未発泡部形成用ブロックを没入させると共に上下型間を離間させて上記所定の閉じ状態にし、上記注入口から上型及び突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and an inlet for injecting a foam material between the upper and lower molds, and between the upper and lower molds The upper mold and the lower mold having the unfoamed part forming block configured to be able to appear and retract are brought closer to the upper and lower molds than the predetermined closed state, and the unfoamed part forming block is projected. Injecting the foam material from the injection port in the state, or after injecting the foam material from the injection port, the unfoamed portion forming block protrudes to foam the foam material,
The non-foamed part forming block is immersed and the upper and lower molds are separated to the predetermined closed state, and the foam material is formed in the space where the upper mold and the unfoamed part forming block in the protruding state existed from the inlet. And a second foaming step of foaming the foamed material by injecting foam.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する第1注入口と上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する第2注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記第1注入口から発泡材料を注入するか、或いは、上記第1注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、
上記未発泡部形成用ブロックを没入させ、上記第2注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state has a desired foam core shape, between the first injection port for injecting a foam material between the upper and lower molds and the upper and lower molds An upper mold and a lower mold having a non-foamed portion forming block configured to be able to appear and retract and provided with a second inlet for injecting a foam material between the upper and lower molds into the non-foamed portion forming block In the predetermined closed state and after injecting the foam material from the first injection port with the unfoamed portion forming block protruding, or after injecting the foam material from the first injection port A first foaming step of projecting the non-foamed part forming block to foam the foamed material;
A second foaming step of immersing the unfoamed part forming block and injecting the foamed material into the space where the unfoamed part forming block protruding from the second injection port was present to foam the foamed material; A foam core forming method comprising:
上記第1発泡工程で、第1注入口に加えて第2注入口からも発泡材料を注入することを特徴とする請求項2記載の発泡コア成形方法。   3. The foam core forming method according to claim 2, wherein in the first foaming step, a foam material is injected from the second inlet in addition to the first inlet. 所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に対して出没可能に構成された未発泡部形成用のブロックを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、
上記未発泡部形成用ブロックを没入させ、上記注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる第2発泡工程とを備えたことを特徴とする発泡コア成形方法。
A block for forming an unfoamed portion, which is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and is configured to be able to protrude and retract between the upper and lower molds An upper mold and a lower mold in which an injection port for injecting a foam material between the upper and lower molds is provided in the unfoamed part forming block, and the unfoamed part forming block is A foaming material is injected from the injection port in a projecting state, or the foaming material is foamed by projecting the non-foamed portion forming block after injecting the foaming material from the injection port. When,
A second foaming step of immersing the unfoamed part forming block and injecting the foamed material into the space where the unfoamed part forming block protruding from the injection port was present to foam the foamed material. A foam core molding method characterized by the above.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する注入口と、上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有する上型及び下型を、上記所定の閉じ状態よりも上下型間が近接した状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる発泡工程と、
上記未発泡部形成用ブロックを没入させると共に上下型間を離間させて上記所定の閉じ状態にし、上記注入口から上型及び突出状態の未発泡部形成用ブロックが存在していた空間に未発泡材料を注入する未発泡材料充填工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and an inlet for injecting a foam material between the upper and lower molds, and between the upper and lower molds The upper mold and the lower mold having the unfoamed part forming block configured to be able to appear and retract are brought closer to the upper and lower molds than the predetermined closed state, and the unfoamed part forming block is projected. Injecting the foam material from the injection port in the state, or after injecting the foam material from the injection port, the foaming material is foamed by projecting the unfoamed portion forming block, and
The non-foamed part forming block is immersed and the upper and lower molds are separated to the predetermined closed state, and the upper mold and the unfoamed part forming block in the protruding state existed from the inlet into the space where the non-foamed part forming block was present. A foamed core molding method comprising: an unfoamed material filling step of injecting a material.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する注入口と、上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有する上型及び下型を、上記所定の閉じ状態よりも上下型間が近接した状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から未発泡材料を注入するか、或いは、上記注入口から未発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させる未発泡材料充填工程と、
上記未発泡部形成用ブロックを没入させると共に上下型間を離間させて上記所定の閉じ状態にし、上記注入口から上型及び突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる発泡工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and an inlet for injecting a foam material between the upper and lower molds, and between the upper and lower molds The upper mold and the lower mold having the unfoamed part forming block configured to be able to appear and retract are brought closer to the upper and lower molds than the predetermined closed state, and the unfoamed part forming block is projected. Injecting the unfoamed material from the inlet in the state, or filling the unfoamed material forming step to project the unfoamed part forming block after injecting the unfoamed material from the inlet,
The non-foamed part forming block is immersed and the upper and lower molds are separated to the predetermined closed state, and the foam material is formed in the space where the upper mold and the unfoamed part forming block in the protruding state existed from the inlet. And a foaming step of foaming the foamed material by injecting foam.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する第1注入口と上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する第2注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記第1注入口から発泡材料を注入するか、或いは、上記第1注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる第1発泡工程と、
上記未発泡部形成用ブロックを没入させ、上記第2注入口から突出状態の未発泡部形成用ブロックが存在していた空間に未発泡材料を注入する未発泡材料充填工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state has a desired foam core shape, between the first injection port for injecting a foam material between the upper and lower molds and the upper and lower molds An upper mold and a lower mold having a non-foamed portion forming block configured to be able to appear and retract and provided with a second inlet for injecting a foam material between the upper and lower molds into the non-foamed portion forming block In the predetermined closed state and after injecting the foam material from the first injection port with the unfoamed portion forming block protruding, or after injecting the foam material from the first injection port A first foaming step of projecting the non-foamed part forming block to foam the foamed material;
An unfoamed material filling step of immersing the unfoamed part forming block and injecting an unfoamed material into a space where the unfoamed part forming block protruding from the second injection port was present A method for forming a foamed core.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に発泡材料を注入する第1注入口と上下型間に対して出没可能に構成された未発泡部形成用のブロックとを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する第2注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記第1注入口から未発泡材料を注入するか、或いは、上記第1注入口から未発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させる未発泡材料充填工程と、
上記未発泡部形成用ブロックを没入させ、上記第2注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる発泡工程とを備えたことを特徴とする発泡コア成形方法。
An upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state has a desired foam core shape, between the first injection port for injecting a foam material between the upper and lower molds and the upper and lower molds An upper mold and a lower mold having a non-foamed portion forming block configured to be able to appear and retract and provided with a second inlet for injecting a foam material between the upper and lower molds into the non-foamed portion forming block In the predetermined closed state and injecting unfoamed material from the first inlet with the unfoamed portion forming block protruding, or injecting unfoamed material from the first inlet An unfoamed material filling step for projecting the unfoamed part forming block after,
A foaming step of immersing the unfoamed portion forming block and injecting the foamed material into the space where the unfoamed portion forming block protruding from the second injection port was present to foam the foamed material. A foam core molding method characterized by the above.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に対して出没可能に構成された未発泡部形成用のブロックを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から発泡材料を注入するか、或いは、上記注入口から発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させて、発泡材料を発泡させる発泡工程と、
上記未発泡部形成用ブロックを没入させ、上記注入口から突出状態の未発泡部形成用ブロックが存在していた空間に未発泡材料を注入する未発泡材料充填工程とを備えたことを特徴とする発泡コア成形方法。
A block for forming an unfoamed portion, which is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and is configured to be able to protrude and retract between the upper and lower molds An upper mold and a lower mold in which an injection port for injecting a foam material between the upper and lower molds is provided in the unfoamed part forming block, and the unfoamed part forming block is Injecting foam material from the injection port in the protruded state, or starting the injection of foam material from the injection port and then projecting the non-foamed portion forming block to foam the foam material, and
An unfoamed material filling step of immersing the unfoamed part forming block and injecting an unfoamed material into a space where the unfoamed part forming block protruding from the injection port was present A foam core molding method.
所定の閉じ状態での上下型間の空間形状が所望の発泡コア形状となっている上型及び下型であって、上下型間に対して出没可能に構成された未発泡部形成用のブロックを有し、該未発泡部形成用ブロックに上下型間に発泡材料を注入する注入口が設けられている上型及び下型を、上記所定の閉じ状態にし、上記未発泡部形成用ブロックを突出させた状態で上記注入口から未発泡材料を注入するか、或いは、上記注入口から未発泡材料を注入開始した後に上記未発泡部形成用ブロックを突出させる未発泡材料充填工程と、
上記未発泡部形成用ブロックを没入させ、上記注入口から突出状態の未発泡部形成用ブロックが存在していた空間に発泡材料を注入して発泡材料を発泡させる発泡工程とを備えたことを特徴とする発泡コア成形方法。
A block for forming an unfoamed portion, which is an upper mold and a lower mold in which a space shape between the upper and lower molds in a predetermined closed state is a desired foam core shape, and is configured to be able to protrude and retract between the upper and lower molds An upper mold and a lower mold in which an injection port for injecting a foam material between the upper and lower molds is provided in the unfoamed part forming block, and the unfoamed part forming block is Injecting the unfoamed material from the injection port in a projecting state, or filling the unfoamed part forming block after injecting the non-foamed material from the injection port,
A foaming step of immersing the unfoamed part forming block and injecting the foamed material into a space where the unfoamed part forming block protruding from the injection port was present to foam the foamed material. A method for forming a foamed core.
パネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成る強化パネルの成形方法であって、
熱硬化性樹脂または熱可塑性樹脂を含浸させたシート状の強化繊維材料を、変形可能な状態で、請求項1〜10のいずれかに記載の発泡コア成形方法で成形された芯材となる発泡コアの繊維強化プラスチック層を形成する面に対向させて配置し、
その強化繊維材料及び発泡コアを所定の上型及び下型によって加圧し、強化繊維材料及び発泡コアを型形状に馴染ませて所望の形状とするプリフォーム工程と、
強化繊維材料に含浸している熱硬化性樹脂または熱可塑性樹脂の硬化・固化反応が進行可能な温度に設定されている所定の上型及び下型で、上記プリフォーム工程を経た強化繊維材料及び発泡コアを加圧し、強化繊維材料に含浸している熱硬化性樹脂または熱可塑性樹脂を硬化または固化して強化繊維材料を発泡コアに圧着するプレス工程とを備えたことを特徴とする強化パネル成形方法。
A method for molding a reinforced panel comprising a fiber-reinforced plastic layer formed on at least one surface of a panel-like foam core,
A sheet-like reinforcing fiber material impregnated with a thermosetting resin or a thermoplastic resin, a deformable state, the core material is molded of foam core molding method according to any one of claims 1-10 foamed Place it facing the surface that forms the fiber reinforced plastic layer of the core,
Pressing the reinforcing fiber material and the foamed core with a predetermined upper mold and lower mold, and making the reinforcing fiber material and the foamed core into a mold shape into a desired shape,
Reinforcing fiber material that has undergone the above preforming process in a predetermined upper mold and lower mold that are set at a temperature at which the curing / solidification reaction of the thermosetting resin or thermoplastic resin impregnated in the reinforcing fiber material can proceed A reinforced panel comprising a pressing step of pressurizing a foam core and curing or solidifying a thermosetting resin or a thermoplastic resin impregnated in the reinforcing fiber material to press the reinforcing fiber material to the foam core. Molding method.
上記プリフォーム工程で、上型及び下型による加圧と共に、上型及び下型の少なくとも一方の型に設けられた吸引孔からのエア吸引による減圧、または上型及び下型の少なくとも一方の型に設けられた吹き付け孔からのエア吹き付けによる加圧を行うことを特徴とする請求項11に記載の強化パネル成形方法。   In the preform process, the upper mold and the lower mold are pressurized and the pressure is reduced by air suction from at least one of the upper mold and the lower mold, or at least one of the upper mold and the lower mold. The method of forming a reinforced panel according to claim 11, wherein pressurization is performed by blowing air from a blowing hole provided in the hood. 請求項1〜10のいずれかに記載の発泡コア成形方法で成形されたパネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成るパネル構造であって、
上記発泡コアの発泡形状が所定方向に長い楕円体となっていることを特徴とするパネル構造。
A panel structure in which a fiber-reinforced plastic layer is formed on at least one surface of a panel-like foam core molded by the foam core molding method according to claim 1,
A panel structure, wherein the foamed shape of the foamed core is an ellipsoid that is long in a predetermined direction.
請求項1〜10のいずれかに記載の発泡コア成形方法で成形されたパネル状の発泡コアの少なくとも一方の面に繊維強化プラスチック層が形成されて成るパネル構造であって、
上記発泡コアには、その外周縁以外に、一方の面から他方の面にわたる未発泡部が形成されていることを特徴とするパネル構造。
A panel structure in which a fiber-reinforced plastic layer is formed on at least one surface of a panel-like foam core molded by the foam core molding method according to claim 1,
A panel structure characterized in that an unfoamed portion extending from one surface to the other surface is formed on the foam core other than the outer peripheral edge thereof.
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