JP2006272640A - Mold structure for resin molding - Google Patents

Mold structure for resin molding Download PDF

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Publication number
JP2006272640A
JP2006272640A JP2005092441A JP2005092441A JP2006272640A JP 2006272640 A JP2006272640 A JP 2006272640A JP 2005092441 A JP2005092441 A JP 2005092441A JP 2005092441 A JP2005092441 A JP 2005092441A JP 2006272640 A JP2006272640 A JP 2006272640A
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mold
resin
slide
molding
cavity
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JP4521557B2 (en
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Hiroteru Takahashi
裕輝 高橋
Kazuhiko Tokutomi
和彦 徳富
Shinji Kasami
真司 賀佐見
Tomoji Mori
智司 森
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Nissan Motor Co Ltd
Daikyo Nishikawa Corp
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Nissan Motor Co Ltd
GP Daikyo Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold structure for resin molding featuring a structural simplicity and the non-generation of a drag in a slide mold during molding. <P>SOLUTION: This mold structure for resin molding comprises a cavity side part 3 retained on the underside and a force side part 5 configured movably to the cavity side part 3. A molten resin 35 is injected into a cavity 11 formed by molding surfaces 13 and 39 of the cavity side part 3/the force side part 5 and thereby, made to expand/harden and thus a resin substrate 49 can be molded. In this mold structure, a recessed part 15 is formed in the molding surface 13 on the cavity 11 side of the cavity side part 3, and in the recessed part 15, a freely movable slide mold 17 is installed to the cavity side part 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、樹脂成形用金型構造に関し、更に詳しくは、発泡樹脂製の成形品を成形する際に用いる金型の構造に関する。   The present invention relates to a resin molding mold structure, and more particularly to a mold structure used when molding a molded product made of foamed resin.

従来、発泡樹脂からなる樹脂製成形品を成形する際には、固定型と可動型とからなる金型のキャビティに溶融樹脂を注入及び充填させ、この溶融樹脂を発泡及び固化させることにより成形している。   Conventionally, when molding a resin molded product made of a foamed resin, the molten resin is injected and filled into a cavity of a mold composed of a fixed mold and a movable mold, and the molten resin is foamed and solidified. ing.

また、樹脂製成形品の各部位ごとに板厚を変える場合は、薄肉部に対応する金型の部位には、可動型と別途に摺動するスライド型を設け、該スライド型を可動型の成形面よりも突出して成形することにより、スライド型が当接する部位を他の一般部位よりも薄く成形することが行われている（例えば、特許文献１参照）。
特開２００３−３９５１１公報 In addition, when changing the plate thickness for each part of the resin molded product, a slide mold that slides separately from the movable mold is provided at the mold part corresponding to the thin portion, and the slide mold is a movable mold. By projecting from the molding surface and molding, the part with which the slide mold abuts is formed thinner than other general parts (for example, see Patent Document 1).
JP 2003-39511 A

しかしながら、前記従来例では、スライド型が金型の可動型に設けられていたため、可動型を上下移動させる機構と、スライド型を上下移動させる機構とをそれぞれ別途に設ける必要があり、金型構造が非常に複雑になるという問題があった。   However, since the slide mold is provided in the movable mold of the mold in the conventional example, it is necessary to separately provide a mechanism for moving the movable mold up and down and a mechanism for moving the slide mold up and down separately. There was a problem that became very complicated.

また、樹脂成形品の成形時に、スライド型と可動型との隙間内に樹脂が入り込み、スライド型にかじりが発生するおそれがあった。   Further, when the resin molded product is molded, the resin may enter the gap between the slide mold and the movable mold, and the slide mold may be galled.

そこで、本発明は、構造が簡単で、成形時にスライド型にかじりが発生することのない樹脂成形用金型構造を提供することを目的としている。   Accordingly, an object of the present invention is to provide a mold structure for resin molding that has a simple structure and does not cause galling in a slide mold during molding.

前記目的を達成するために、本発明は、所定位置に保持される固定型と、該固定型に対して移動自在に構成された可動型とを備え、これら固定型と可動型とで形成されるキャビティ内に溶融樹脂を注入して発泡及び固化させることにより、樹脂製の成形品を成形する樹脂成形用金型構造において、前記固定型のキャビティ側の成形面に凹部を設け、該凹部内に、固定型に対して移動自在のスライド型を設けたことを特徴としている。   In order to achieve the above object, the present invention includes a fixed mold that is held in a predetermined position, and a movable mold that is configured to be movable with respect to the fixed mold, and is formed by the fixed mold and the movable mold. In a resin molding mold structure for molding a resin molded product by injecting molten resin into a cavity to be foamed and solidified, a recess is provided on the molding surface on the cavity side of the fixed mold, Further, the present invention is characterized in that a slide mold that is movable with respect to the fixed mold is provided.

本発明に係る樹脂成形用金型構造によれば、金型の構造が簡素化されるため、金型の製造コストを大幅に低減することができる。   According to the mold structure for resin molding according to the present invention, since the structure of the mold is simplified, the manufacturing cost of the mold can be greatly reduced.

また、樹脂製成形品を成形する際、スライド型が摺動してもかじり等が発生することなく、円滑な成形作業を行うことができる。即ち、従来は、スライド型が可動型に設けられていたため、スライド型と可動型との隙間内に樹脂が入り込み、スライド型にかじりが発生するおそれがあったが、本実施形態によれば、スライド型を固定型に設けたため、従来のようにスライド型にかじりが発生することはなくなる。   Further, when molding a resin molded product, a smooth molding operation can be performed without causing galling or the like even if the slide mold slides. That is, conventionally, since the slide mold was provided in the movable mold, there was a possibility that the resin enters the gap between the slide mold and the movable mold, and the slide mold may be galling. Since the slide mold is provided in the fixed mold, no galling occurs in the slide mold as in the prior art.

以下、本発明の実施形態を図面と共に詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は本発明の実施形態による金型の断面図である。   FIG. 1 is a sectional view of a mold according to an embodiment of the present invention.

この金型１は、下側に保持される固定型３と、該固定型３の上側に配置され、固定型３に対して上下方向に移動自在の可動型５とを備え、これらの固定型３及び可動型５は、ダイプレート７，９を介して図外の射出成形装置に取り付けられている。前記固定型３は凸状に形成され、可動型５は凹状に形成され、可動型５に固定型３が嵌合して上下にスライドするように構成されている。また、固定型３に可動型５が嵌合されたときに、固定型３の成形面（上面）１３と可動型５の成形面（底面）３９との間に、キャビティ（成形品空間）１１が形成されている。   The mold 1 includes a fixed mold 3 held on the lower side, and a movable mold 5 disposed on the upper side of the fixed mold 3 and movable in the vertical direction with respect to the fixed mold 3. 3 and the movable mold 5 are attached to an injection molding apparatus (not shown) via die plates 7 and 9. The fixed mold 3 is formed in a convex shape, the movable mold 5 is formed in a concave shape, and the fixed mold 3 is fitted to the movable mold 5 and slides up and down. Further, when the movable mold 5 is fitted to the fixed mold 3, a cavity (molded product space) 11 is formed between the molding surface (upper surface) 13 of the fixed mold 3 and the molding surface (bottom surface) 39 of the movable mold 5. Is formed.

前記固定型３は、前述したように、ダイプレート９を介して射出成形装置に固定されており、その成形面１３には、下方に凹んだ細長い凹部１５が上下方向に沿って形成されている。この凹部１５内にスライド型１７が設けられ、該スライド型１７は、駆動装置１９を介して上下方向に摺動自在に設けられている。   As described above, the fixed mold 3 is fixed to the injection molding apparatus via the die plate 9, and the molding surface 13 is formed with a long and narrow recess 15 which is recessed downward along the vertical direction. . A slide die 17 is provided in the recess 15, and the slide die 17 is provided to be slidable in the vertical direction via a drive device 19.

前記固定型３には、溶融樹脂をキャビティ内に導入するための湯口（スプール）２１、湯道（ランナー）２３及び注入口（ゲート）２５が形成されている。前記湯口２１には、図外のノズルが取り付けられており、このノズルを介して湯口２１に溶融樹脂３５が注入されると、湯道２３を通って注入口２５から前記キャビティ１１に溶融樹脂３５が流れ込む。   The fixed mold 3 is formed with a sprue (spool) 21, a runner 23 and an injection port (gate) 25 for introducing the molten resin into the cavity. A nozzle (not shown) is attached to the gate 21, and when the molten resin 35 is injected into the gate 21 through this nozzle, the molten resin 35 passes from the inlet 25 to the cavity 11 through the runner 23. Flows in.

図２はスライド型の近傍部を示す断面図である。   FIG. 2 is a cross-sectional view showing the vicinity of the slide mold.

固定型３のキャビティ１１側の成形面１３に形成された凹部１５内には、スライド型１７が収納されている。このスライド型１７の下部には、スライド型１７を上下に摺動させる油圧式の駆動装置（駆動手段）１９が配設されている。該駆動装置１９は、凹部１５の底部に固定された駆動装置本体２７と、該駆動装置本体２７に設けられ、上下に摺動自在に構成されたロッド２９と、該ロッドの先端に設けられた押圧部３１とを備えている。この押圧部とスライド型１７との間には、中間部材３３が設けられている。従って、ロッド２９が上下に移動すると、押圧部３１と共に中間部材３３が上下移動することにより、スライド型１７を前記可動型５とは別途に摺動させることができる。   A slide mold 17 is accommodated in a recess 15 formed in the molding surface 13 on the cavity 11 side of the fixed mold 3. A hydraulic driving device (driving means) 19 that slides the slide die 17 up and down is disposed below the slide die 17. The driving device 19 includes a driving device main body 27 fixed to the bottom of the recess 15, a rod 29 provided on the driving device main body 27 and configured to be slidable up and down, and provided at the tip of the rod. And a pressing portion 31. An intermediate member 33 is provided between the pressing portion and the slide mold 17. Therefore, when the rod 29 moves up and down, the intermediate member 33 moves up and down together with the pressing portion 31, so that the slide mold 17 can be slid separately from the movable mold 5.

次いで、図３及び図４を用いて、樹脂成形品の成形方法を簡単に説明する。  Next, a method for molding a resin molded product will be briefly described with reference to FIGS. 3 and 4.

図３は図１の金型に溶融樹脂を充填した状態を示す要部断面図、図４は図３の溶融樹脂が発泡した状態を示す要部断面図である。   FIG. 3 is a cross-sectional view of main parts showing a state in which the mold shown in FIG. 1 is filled with molten resin, and FIG.

図３に示すように、固定型３の注入口から溶融樹脂３５が注入されると、該溶融樹脂３５は左右に広がってキャビティ１１内に充填される。この状態では、未だ溶融樹脂３５は発泡しておらず、厚さＤの状態になっている。   As shown in FIG. 3, when the molten resin 35 is injected from the injection port of the fixed mold 3, the molten resin 35 spreads left and right and is filled in the cavity 11. In this state, the molten resin 35 is not yet foamed and is in a state of thickness D.

次に、図４に示すように、可動型５を上方に移動させると共に、スライド型１７も可動型５と同一長さ分だけ上方に移動させる。可動型５を上方に移動させると、溶融樹脂３５が発泡して厚みＨの発泡樹脂４１となる。また、スライド型１７を上方に移動させると、このスライド型１７の上面３７と可動型内の成形面３９との上下高さはＤとなるため、発泡樹脂４１におけるスライド型１７の当接部分は発泡することなく、固定型３の成形面１３と可動型５の成形面３９との上下高さＨよりも小さく形成される。よって、発泡樹脂４１のうち、スライド型１７の上面３７が当たる部分の板厚Ｄは、他の一般部位の板厚Ｈよりも薄く成形される。この状態で溶融樹脂３５が冷却及び固化されたのち、可動型５をさらに上方に持ち上げると共にスライド型１７を下降させると、発泡樹脂４１からなる樹脂成形品が成形される。  Next, as shown in FIG. 4, the movable mold 5 is moved upward, and the slide mold 17 is also moved upward by the same length as the movable mold 5. When the movable mold 5 is moved upward, the molten resin 35 foams and becomes a foamed resin 41 having a thickness H. When the slide mold 17 is moved upward, the vertical height between the upper surface 37 of the slide mold 17 and the molding surface 39 in the movable mold becomes D. Therefore, the contact portion of the slide mold 17 in the foamed resin 41 is Without foaming, the molding surface 13 of the fixed mold 3 and the molding surface 39 of the movable mold 5 are formed smaller than the vertical height H. Therefore, the plate thickness D of the portion of the foamed resin 41 where the upper surface 37 of the slide mold 17 hits is formed thinner than the plate thickness H of other general parts. After the molten resin 35 is cooled and solidified in this state, when the movable mold 5 is further lifted upward and the slide mold 17 is lowered, a resin molded product made of the foamed resin 41 is molded.

図５は自動車用ドア部品である樹脂製基板を成形するための成形用金型に溶融樹脂を充填した状態を示す断面図である。   FIG. 5 is a cross-sectional view showing a state in which a molding die for molding a resin substrate, which is an automobile door part, is filled with molten resin.

この場合も、キャビティ１１に溶融樹脂３５が注入及び充填されると、スライド型１７が当接する部位の溶融樹脂３５の板厚はｄとなり、スライド型１７が当接しない一般部位の板厚はｈになる。   Also in this case, when the molten resin 35 is injected and filled into the cavity 11, the thickness of the molten resin 35 at the portion where the slide mold 17 abuts becomes d, and the thickness of the general portion where the slide mold 17 does not abut is h. become.

図６は図５の溶融樹脂が発泡した状態を示す断面図である。   FIG. 6 is a cross-sectional view showing a state where the molten resin of FIG. 5 is foamed.

次いで、可動型５及びスライド型１７を上方に移動させると溶融樹脂３５が発泡して発泡樹脂４１になる。このとき、発泡樹脂４１のうち、スライド型１７が当接している部位の板厚はｄのままであり、スライド型１７が当接していない一般部位の板厚はｈ’に膨張する。即ち、スライド型１７が当接する部位の板厚ｄを他の一般部位の板厚ｈ’よりも薄く成形される。   Next, when the movable mold 5 and the slide mold 17 are moved upward, the molten resin 35 foams to become the foamed resin 41. At this time, the thickness of the portion of the foamed resin 41 where the slide die 17 is in contact remains d, and the thickness of the general portion where the slide die 17 is not in contact expands to h ′. That is, the plate thickness d of the portion with which the slide mold 17 abuts is formed thinner than the plate thickness h ′ of other general portions.

図７は本発明の実施形態による樹脂製基板を含むドアの分解斜視図である。   FIG. 7 is an exploded perspective view of a door including a resin substrate according to an embodiment of the present invention.

このドア４３は、ドアパネル４５、ウィンドウパネル４７、樹脂製基板４９、ドアトリム５１からなり、樹脂製基板４９を介してドアトリム５１をドアパネル４５に組み付けている。   The door 43 includes a door panel 45, a window panel 47, a resin substrate 49, and a door trim 51, and the door trim 51 is assembled to the door panel 45 through the resin substrate 49.

図８は図７の樹脂製基板を示す斜視図、図９は図８の樹脂製基板の要部を拡大して示す斜視図、及び図１０は図９の断面図である。   8 is a perspective view showing the resin substrate of FIG. 7, FIG. 9 is an enlarged perspective view showing the main part of the resin substrate of FIG. 8, and FIG. 10 is a sectional view of FIG.

図８に示すように、この樹脂製基板４９には、図外のウィンドウパネル用昇降モータ等を組み付けてあり、その前側上部には、膨出部分５３が形成されている。   As shown in FIG. 8, a window panel elevating motor (not shown) or the like is assembled to the resin substrate 49, and a bulging portion 53 is formed in the front upper portion thereof.

この膨出部分５３は、上部側に形成された厚肉部５５と、下部側に形成された薄肉部５７とからなり、薄肉部５７は、図６で説明したようにスライド型１７が当接する部位に対応し、厚肉部５５は、スライド型１７が当接しない一般部位に対応している。   The bulging portion 53 includes a thick portion 55 formed on the upper side and a thin portion 57 formed on the lower side. The thin portion 57 contacts the slide mold 17 as described with reference to FIG. Corresponding to the part, the thick portion 55 corresponds to a general part where the slide mold 17 does not contact.

以下に、本発明の実施形態による作用効果について説明する。   Below, the effect by embodiment of this invention is demonstrated.

前記固定型３のキャビティ１１側の成形面に凹部１５を設け、該凹部１５内に、固定型３に対して移動自在のスライド型１７を設けているため、金型１の構造が簡素化され、金型１のコストを大幅に低減することができる。   Since the recess 15 is provided on the molding surface of the fixed mold 3 on the cavity 11 side, and the slide mold 17 movable with respect to the fixed mold 3 is provided in the recess 15, the structure of the mold 1 is simplified. The cost of the mold 1 can be greatly reduced.

また、スライド型１７が摺動する際にかじり等が発生することなく、円滑な成形作業を行うことができる。即ち、従来は、スライド型１７が可動型５に設けられていたため、スライド型１７と可動型５との隙間内に樹脂が入り込み、スライド型１７にかじりが発生するおそれがあったが、本実施形態によれば、スライド型１７を固定型３に設けたため、従来のようにスライド型１７にかじりが発生することはなくなる。   Further, a smooth molding operation can be performed without causing galling or the like when the slide mold 17 slides. That is, conventionally, since the slide mold 17 is provided on the movable mold 5, there is a possibility that resin enters the gap between the slide mold 17 and the movable mold 5, and the slide mold 17 may be galling. According to the embodiment, since the slide mold 17 is provided in the fixed mold 3, the slide mold 17 is not galling unlike the conventional technique.

前記スライド型１７を、油圧式の駆動装置１９を介して移動及び保持させるように構成しているため、スライド型１７の押圧力の微調整が可能となり、最終的な樹脂成形品である樹脂製基板４９の薄肉部５７における板厚の寸法精度を向上させることができる。   Since the slide mold 17 is configured to be moved and held via a hydraulic drive unit 19, the pressing force of the slide mold 17 can be finely adjusted, and the final resin molded product is made of resin. The dimensional accuracy of the plate thickness in the thin portion 57 of the substrate 49 can be improved.

本発明の実施形態による金型の断面図である。It is sectional drawing of the metal mold | die by embodiment of this invention. 金型のスライド型近傍部を示す断面図である。It is sectional drawing which shows the slide mold vicinity part of a metal mold | die. 図１の金型内に溶融樹脂を充填した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which filled the molten resin in the metal mold | die of FIG. 図３の溶融樹脂が発泡した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which the molten resin of FIG. 3 foamed. 自動車用ドア部品である樹脂製基板を成形する成形用金型に溶融樹脂を充填した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which filled the metal mold | die which shape | molds the resin-made board | substrates which are automobile door components with the molten resin. 図５の溶融樹脂が発泡した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which the molten resin of FIG. 5 foamed. 本発明の実施形態による樹脂製基板を含むドアの分解斜視図である。It is a disassembled perspective view of the door containing the resin-made board | substrates by embodiment of this invention. 図７の樹脂製基板を示す斜視図である。It is a perspective view which shows the resin-made board | substrates of FIG. 図８の樹脂製基板の要部を拡大した斜視図である。It is the perspective view which expanded the principal part of the resin-made board | substrates of FIG. 図９の断面図である。FIG. 10 is a cross-sectional view of FIG. 9.

符号の説明Explanation of symbols

１…金型
３…固定型
５…可動型
１１…キャビティ
１３，３９…成形面
１５…凹部
１７…スライド型
１９…駆動装置（駆動手段）
３５…溶融樹脂 DESCRIPTION OF SYMBOLS 1 ... Metal mold | dies 3 ... Fixed mold | type 5 ... Movable type | mold 11 ... Cavity 13,39 ... Molding surface 15 ... Recessed part 17 ... Slide type | mold 19 ... Drive apparatus (drive means)
35 ... Molten resin

Claims (2)

所定位置に保持される固定型と、該固定型に対して移動自在に構成された可動型とを備え、これら固定型と可動型とで形成されるキャビティ内に溶融樹脂を注入して発泡及び固化させることにより、樹脂製の成形品を成形する樹脂成形用金型構造において、
前記固定型のキャビティ側の成形面に凹部を設け、該凹部内に、固定型に対して移動自在のスライド型を設けたことを特徴とする樹脂成形用金型構造。 A fixed mold that is held at a predetermined position, and a movable mold configured to be movable with respect to the fixed mold. The molten resin is injected into a cavity formed by the fixed mold and the movable mold to foam and In the mold structure for resin molding that molds a resin molded product by solidifying,
A mold structure for resin molding, wherein a recess is provided on a cavity-side molding surface of the fixed mold, and a slide mold movable relative to the fixed mold is provided in the recess. 前記スライド型を、油圧式の駆動手段を介して移動及び保持させるように構成したことを特徴とする請求項１に記載の樹脂成形用金型構造。
2. The mold structure for resin molding according to claim 1, wherein the slide mold is configured to be moved and held via a hydraulic drive means.
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Cited By (1)

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JPH03254919A (en) * 1990-03-06 1991-11-13 Takata Kk Manufacture of module cover of air bag
JP2002067111A (en) * 2000-08-30 2002-03-05 Inoac Corp Foamed molding with solid part and its manufacturing method
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