JP2018171714A - Method of producing interior material for vehicle and interior material for vehicle - Google Patents

Method of producing interior material for vehicle and interior material for vehicle Download PDF

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JP2018171714A
JP2018171714A JP2017069712A JP2017069712A JP2018171714A JP 2018171714 A JP2018171714 A JP 2018171714A JP 2017069712 A JP2017069712 A JP 2017069712A JP 2017069712 A JP2017069712 A JP 2017069712A JP 2018171714 A JP2018171714 A JP 2018171714A
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base material
resin
mold
peripheral portion
gate
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関口 徹
Toru Sekiguchi
徹 関口
寛男 松原
Hiroo Matsubara
寛男 松原
貴彦 谷口
Takahiko Taniguchi
貴彦 谷口
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Hayashi Telempu Corp
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Hayashi Telempu Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a novel method of producing an interior material for a vehicle capable of increasing a degree of designing freedom related to a rear face shape of the interior material for a vehicle whose base material is bonded to a molded part of injection molded resin at least on the rear face thereof; and a novel interior material for a vehicle the rear face of which has bonded thereto a resin injection molded part having a high degree of forming freedom.SOLUTION: A method of producing an interior material 1 for a vehicle includes: a step of forming a base material 5 with a required shape including a through hole 14 communicating from a design surface 15 to a rear surface 10b and containing air Ar; a step of transferring the base material 5 to an injection mold die 310 from outside the injection mold die 310, the injection mold die including a mold surface 330 including a general surface 340 matching the shape of the base material 5, being provided with a gate 316 on the design surface 15 side of the base material 5, and being provided with a cavity CA1 on the rear surface 10b side of the base material 5; and a step of ejecting resin R1 from the gate 316 to the cavity CA1 of the injection mold die 310 in which the base material 5 is disposed via the through hole 14 to obtain an interior material 1 for a vehicle in which a molded part 50 made of resin is bonded to the base material 5.SELECTED DRAWING: Figure 5

Description

本発明は、成形された基材に射出成形による樹脂の成形部を接合した車両用内装材、及び、その製造方法に関する。   The present invention relates to a vehicle interior material in which a molded part of resin by injection molding is joined to a molded base material, and a method for manufacturing the same.

特許文献1には、繊維及び熱可塑性樹脂を含むトリムボードと、トリムボード上に射出成形されたリブ付き取付ボスと、を備えたドアトリムの製造方法が開示されている。成形前のプレボードを加熱された状態で金型によってプレス成形し、その状態、すなわち、プレボードに含まれる熱可塑性樹脂が溶融している高温状態で金型に形成されたリブ付き取付ボス用キャビティに溶融樹脂を射出すると、トリムボード上にリブ付き取付ボスが形成される。すなわち、プレボードのプレス成形とリブ付き取付ボス用の射出成形とで同じ金型が用いられ、該金型には基材形成用のキャビティとリブ付き取付ボス形成用のキャビティとが存在する。取付ボス形成用のキャビティには、樹脂射出口であるゲートから取付ボス成形空間に繋がるリブ用ランナーが含まれる。プレボードをプレス成形する成形装置の下型には、ランナーに沿って上型に向かって突出した突出部が形成されている。この突出部によりトリムボードの裏面が強く押圧されるため、突出部とトリムボード裏面との間に溶融樹脂が入り込む事態、すなわち、溶融樹脂がトリムボード裏面上に浸み出す事態が抑制される。   Patent Document 1 discloses a method for manufacturing a door trim including a trim board containing fibers and a thermoplastic resin, and a mounting boss with a rib that is injection-molded on the trim board. The preboard before molding is press-molded with a mold in a heated state, and in that state, that is, in a cavity for a ribbed mounting boss formed on the mold in a high temperature state in which the thermoplastic resin contained in the preboard is melted. When the molten resin is injected, a ribbed mounting boss is formed on the trim board. That is, the same mold is used for the press molding of the preboard and the injection molding for the mounting boss with rib, and the mold has a cavity for forming the base material and a cavity for forming the mounting boss with rib. The cavity for forming the mounting boss includes a rib runner that connects the gate serving as the resin injection port to the mounting boss forming space. The lower mold of the molding apparatus for press-molding the preboard is formed with a projecting portion that projects toward the upper mold along the runner. Since the rear surface of the trim board is strongly pressed by the protruding portion, a situation where the molten resin enters between the protruding portion and the rear surface of the trim board, that is, a situation where the molten resin oozes out on the rear surface of the trim board is suppressed.

特許文献1に示される製造方法では、プレボードをプレス成形する際にプレボードの一部がリブ付き取付ボス用キャビティ内部に入り込む事態を抑制するため、まず、プレボードにおけるリブ付き取付ボスの成形箇所が、その周囲よりも薄肉状の凹部となるように加熱プレスをする加熱プレス工程を行っている。そのうえで、前記凹部を有するプレボードを金型によって所要形状にプレス成形し、この状態で溶融樹脂を射出してリブ付き取付ボスを形成している。前記凹部を有するプレボードは、略平板形状であり、ドアトリムとしての所要形状を有していない。   In the manufacturing method shown in Patent Document 1, in order to suppress a situation in which a part of the preboard enters the inside of the rib-attached mounting boss cavity when the preboard is press-molded, first, the molding location of the ribbed mounting boss in the preboard is: A hot pressing process is performed in which the hot pressing is performed so that the concave portion is thinner than the surroundings. After that, the preboard having the concave portion is press-molded into a required shape by a mold, and in this state, molten resin is injected to form a mounting boss with ribs. The preboard having the concave portion has a substantially flat plate shape and does not have a required shape as a door trim.

特開2014−188688号公報JP 2014-188688 A

上述した金型には、リブ付き取付ボス形成用のキャビティ、及び、ゲートに繋がる射出装置がトリムボードの裏面側に配置されている。従って、トリムボードの裏面にリブ付き取付ボス等の構造物を射出成形するためには、ゲート及び射出装置の配置も考慮する必要があり、その分、設計の自由度が低くなる。
尚、上述のような問題は、ドアトリム以外にも、デッキサイドトリムやルーフトリム等、種々の車両用内装材について同様に存在する。
In the mold described above, the cavity for forming the mounting boss with ribs and the injection device connected to the gate are arranged on the back side of the trim board. Accordingly, in order to injection-mold a structure such as a mounting boss with a rib on the rear surface of the trim board, it is necessary to consider the arrangement of the gate and the injection device, and the degree of design is reduced accordingly.
In addition to the door trim, the above-described problems similarly exist in various vehicle interior materials such as a deck side trim and a roof trim.

本発明は、車両用内装材の新規の製造方法、及び、新規の車両用内装材を開示するものである。   The present invention discloses a novel manufacturing method of a vehicle interior material and a novel vehicle interior material.

本発明は、空気を含む基材に樹脂による成形部が接合された車両用内装材の製造方法であって、
意匠面から裏面に繋がる貫通孔を有し所要形状の前記基材を形成する基材形成工程と、
前記基材の形状に合わせられた一般面を含む型面を有しゲートが前記基材の意匠面側となりキャビティが前記基材の裏面側となる射出成形型の外から該射出成形型に前記基材を移す移送工程と、
前記基材が配置された前記射出成形型の前記キャビティに前記ゲートから前記貫通孔を介して前記樹脂を射出する射出工程と、を含む、態様を有する。
The present invention is a method for manufacturing an interior material for a vehicle in which a molded part made of resin is bonded to a base material containing air,
A base material forming step of forming the base material of a required shape having a through-hole connected from the design surface to the back surface;
The injection mold has a mold surface including a general surface matched to the shape of the base material, the gate is the design surface side of the base material, and the cavity is the back side of the base material. A transfer process for transferring the substrate;
And an injection step of injecting the resin from the gate to the cavity of the injection mold on which the base material is disposed through the through hole.

また、本発明の車両用内装材は、意匠面から裏面に繋がる貫通孔を有する成形された基材と、
該基材の少なくとも裏面に接合された樹脂の成形部であって前記貫通孔を通って前記基材の意匠面側にある樹脂射出用のゲートの跡に繋がった成形部と、を備える、態様を有する。
Further, the vehicle interior material of the present invention is a molded base material having a through hole that leads from the design surface to the back surface,
A molded part of resin joined to at least the back surface of the base material, and a molded part connected to a trace of a gate for resin injection on the design surface side of the base material through the through hole. Have

請求項1〜請求項5に係る発明によれば、射出成形による樹脂の成形部が基材の少なくとも裏面に接合された車両用内装材の裏面形状の設計自由度を向上させることが可能な新規の製造方法を提供することができる。
請求項6〜請求項8に係る発明によれば、裏面に形状の自由度が高い樹脂射出成形部が接合された新規の車両用内装材を提供することができる。
According to the invention which concerns on Claims 1-5, it is novel which can improve the design freedom of the back surface shape of the interior material for vehicles by which the molding part of resin by injection molding was joined to at least the back surface of a substrate The manufacturing method of can be provided.
According to the invention concerning Claim 6-Claim 8, the novel vehicle interior material by which the resin injection molding part with a high freedom degree of shape was joined to the back surface can be provided.

自動車の内装の例を側面部の図示が省略された状態で示す垂直断面図。The vertical cross section which shows the example of the interior of a motor vehicle in the state in which illustration of the side part was abbreviate | omitted. 成形部を有する内装材の例を車室側から見て示す側面図。The side view which shows the example of the interior material which has a shaping | molding part seeing from the compartment side. 補強リブ及びゲート跡を通る位置における内装材の断面の例を模式的に示す断面図。Sectional drawing which shows typically the example of the cross section of the interior material in the position which passes along a reinforcement rib and a gate trace. 加飾部及びゲート跡を通る位置における内装材の断面の例を模式的に示す断面図。Sectional drawing which shows typically the example of the cross section of the interior material in the position which passes a decoration part and a gate trace. 内装材の製造方法の例を模式的に示す図。The figure which shows the example of the manufacturing method of interior material typically. 基材の意匠面側に押圧部を有する射出成形型の型面の要部を模式的に例示する図。The figure which illustrates typically the principal part of the die surface of the injection mold which has a press part in the design surface side of a base material. 射出成形型から取り出される内装材の基材において意匠面側の押圧部により圧縮された第一周囲部の厚みの少なくとも一部が復元する例を模式的に示す断面図。Sectional drawing which shows typically the example which at least one part of the thickness of the 1st surrounding part compressed by the press part by the side of a design surface restores in the base material of the interior material taken out from an injection mold. 基材の裏面側に押圧部を有する射出成形型の型面の要部を模式的に例示する図。The figure which illustrates typically the principal part of the mold surface of the injection mold which has a press part in the back surface side of a base material. 射出成形型から取り出される内装材の基材において裏面側の押圧部により圧縮された第一周囲部の厚みの少なくとも一部が復元する例を模式的に示す断面図。Sectional drawing which shows typically the example which at least one part of the thickness of the 1st surrounding part compressed by the press part of the back surface restores in the base material of the interior material taken out from the injection mold. 入子型を有する射出成形型から取り出される内装材の基材において押圧部により圧縮された第一周囲部の厚みが復元する例を模式的に示す断面図。Sectional drawing which shows typically the example which the thickness of the 1st circumference | surroundings part compressed by the press part in the base material of the interior material taken out from the injection mold which has a nesting mold restore | restores. 裁断前の内装材の例を車室側から見て示す側面図。The side view which shows the example of the interior material before cutting seen from the vehicle compartment side. 比較例において基材の貫通孔を通る位置における内装材の断面を模式的に示す断面図。Sectional drawing which shows typically the cross section of the interior material in the position which passes the through-hole of a base material in a comparative example.

以下、本発明の実施形態を説明する。むろん、以下の実施形態は本発明を例示するものに過ぎず、実施形態に示す特徴の全てが発明の解決手段に必須になるとは限らない。   Embodiments of the present invention will be described below. Of course, the following embodiments are merely examples of the present invention, and all the features shown in the embodiments are not necessarily essential to the means for solving the invention.

(1)本発明に含まれる技術の概要:
まず、図1〜12に示される例を参照して本発明に含まれる技術の概要を説明する。尚、本願の図は模式的に例を示す図であり、これらの図に示される各方向の拡大率は異なることがあり、各図は整合していないことがある。むろん、本技術の各要素は、符号で示される具体例に限定されない。
(1) Summary of technology included in the present invention:
First, the outline | summary of the technique included in this invention is demonstrated with reference to the example shown by FIGS. In addition, the figure of this application is a figure which shows an example typically, The expansion ratio of each direction shown by these figures may differ, and each figure may not match. Of course, each element of the present technology is not limited to the specific example indicated by the reference numeral.

[態様1]
図3,5等に例示するように、本技術の車両用内装材1の製造方法は、空気Arを含む基材5に樹脂R1による成形部50が接合された車両用内装材1の製造方法であって、基材形成工程ST1、移送工程ST2、及び、射出工程ST3を含む。前記基材形成工程ST1では、意匠面15から裏面10bに繋がる貫通孔14を有し所要形状の前記基材5を形成する。前記移送工程ST2では、前記基材5の形状に合わせられた一般面340を含む型面330を有しゲート316が前記基材5の意匠面15側となりキャビティCA1が前記基材5の裏面10b側となる射出成形型310の外(例えばプレス成形型210)から該射出成形型310に前記基材5を移す。前記射出工程ST3では、前記基材5が配置された前記射出成形型310の前記キャビティCA1に前記ゲート316から前記貫通孔14を介して前記樹脂R1を射出する
[Aspect 1]
As illustrated in FIGS. 3 and 5 and the like, the method for manufacturing the vehicle interior material 1 according to the present technology is a method for manufacturing the vehicle interior material 1 in which the molded portion 50 made of the resin R1 is bonded to the base material 5 containing air Ar. In addition, it includes a base material forming step ST1, a transfer step ST2, and an injection step ST3. In the base material forming step ST1, the base material 5 having a required shape having the through hole 14 connected from the design surface 15 to the back surface 10b is formed. In the transfer step ST2, the mold surface 330 including the general surface 340 matched with the shape of the base material 5 is provided, the gate 316 becomes the design surface 15 side of the base material 5, and the cavity CA1 is the back surface 10b of the base material 5. The base material 5 is transferred to the injection mold 310 from outside the injection mold 310 (for example, the press mold 210). In the injection step ST3, the resin R1 is injected from the gate 316 through the through hole 14 into the cavity CA1 of the injection mold 310 on which the base material 5 is disposed.

上記態様1では、基材5が配置された射出成形型310において基材5の意匠面15側にあるゲート316から基材5の貫通孔14を介して基材5の裏面10b側にあるキャビティCA1に樹脂が射出される。本態様は、射出成形型310に対して樹脂の射出装置320を基材5の裏面10b側に配置する必要が無いので、射出成形型310において基材5の裏面10bに接合される樹脂R1の成形部50を形成する構造の設計自由度が向上する。従って、本態様は、射出成形による樹脂の成形部が基材の少なくとも裏面に接合された車両用内装材の裏面形状の設計自由度を向上させることが可能な新規の製造方法を提供することができる。   In the first aspect, in the injection mold 310 on which the base material 5 is arranged, the cavity on the back surface 10b side of the base material 5 from the gate 316 on the design surface 15 side of the base material 5 through the through hole 14 of the base material 5 Resin is injected into CA1. In this aspect, since it is not necessary to arrange the resin injection device 320 on the back surface 10b side of the base material 5 with respect to the injection mold 310, the resin R1 bonded to the back surface 10b of the base material 5 in the injection mold 310 is used. The degree of freedom in designing the structure forming the molded part 50 is improved. Therefore, this aspect provides a novel manufacturing method capable of improving the degree of freedom in designing the back surface shape of the vehicle interior material in which the molded part of the resin by injection molding is bonded to at least the back surface of the base material. it can.

ここで、空気を含む基材は、繊維が集合した基材、発泡樹脂製の基材、繊維と発泡樹脂を組み合わせた基材、等を含む。これらの材料に表皮材等が接着した基材も、空気を含む基材に含まれる。尚、繊維が集合した基材に成形するための素材は、繊維が集合した素材シート等を含む。
射出される樹脂は、溶融樹脂、硬化性の液状樹脂、等を含む。
尚、上記態様1の付言は、以下の態様も同様である。
Here, the base material containing air includes a base material in which fibers are aggregated, a base material made of foamed resin, a base material that combines fibers and foamed resin, and the like. A base material in which a skin material or the like is bonded to these materials is also included in the base material containing air. In addition, the raw material for shape | molding to the base material with which the fiber aggregated contains the raw material sheet | seat etc. with which the fiber aggregated.
The injected resin includes a molten resin, a curable liquid resin, and the like.
In addition, the remarks of the said aspect 1 are the same also in the following aspects.

[態様2]
図10に例示するように、前記射出成形型310は、型締め時に前記基材5の貫通孔14を介して前記キャビティCA1と繋がる意匠面側キャビティCA2を有してもよい。前記射出工程ST3では、前記基材5が配置された前記射出成形型310の前記意匠面側キャビティCA2及び前記キャビティCA1に前記ゲート316から前記樹脂R1を射出してもよい。本製造方法では、前記基材5の貫通孔14を介して前記基材5の意匠面15側と前記基材5の裏面10b側とに繋がった前記成形部50が前記基材5に接合された前記車両用内装材1を得てもよい。本態様は、射出成形による樹脂R1の成形部50が意匠面15側と裏面10b側とに同時に形成されるので、接着や溶着等の後加工を不要にすることが可能な新規の製造方法を提供することができる。
尚、上記態様2には含まれないが、射出成形型に意匠面側キャビティが無い場合も、本技術に含まれる。
[Aspect 2]
As illustrated in FIG. 10, the injection mold 310 may include a design surface side cavity CA <b> 2 that is connected to the cavity CA <b> 1 through the through hole 14 of the base material 5 when the mold is clamped. In the injection step ST3, the resin R1 may be injected from the gate 316 into the design surface side cavity CA2 and the cavity CA1 of the injection mold 310 on which the base material 5 is disposed. In this manufacturing method, the molding part 50 connected to the design surface 15 side of the base material 5 and the back surface 10b side of the base material 5 through the through hole 14 of the base material 5 is joined to the base material 5. Alternatively, the vehicle interior material 1 may be obtained. In this aspect, since the molded portion 50 of the resin R1 by injection molding is formed on the design surface 15 side and the back surface 10b side at the same time, a novel manufacturing method that can eliminate the need for post-processing such as adhesion and welding Can be provided.
Although not included in the second aspect, the present technology includes a case where the injection mold does not have a design surface side cavity.

[態様3]
図5に例示するように、前記基材形成工程ST1では、前記基材5に前記貫通孔14を形成するための構造(例えば穿孔構造220)を有する素材成形型(例えばプレス成形型210)で素材(例えば素材シート20)を前記所要形状の基材5に成形するとともに前記基材5に前記貫通孔14を形成してもよい。この態様は、基材に成形部が接合された内装材の製造効率を向上させることが可能な製造方法を提供することができる。
ここで、素材の成形は、プレス成形、射出成形、等を含む。すなわち、素材成形型は、プレス成形型、射出成形型、等を含む。素材を成形することには、空気を含む素材シートをプレス成形型で空気を含む所要形状の基材にプレス成形すること、素材を射出成形型に射出して発泡させながら所要形状の基材に射出成形すること、等が含まれる。
尚、上記態様3の付言は、以下の態様も同様である。
また、上記態様3には含まれないが、基材に貫通孔を形成するための構造が素材成形型に無く別工程で貫通孔を形成する場合も、本技術に含まれる。
[Aspect 3]
As illustrated in FIG. 5, in the base material forming step ST <b> 1, a material forming die (for example, a press forming die 210) having a structure (for example, a perforated structure 220) for forming the through hole 14 in the base material 5. A material (for example, material sheet 20) may be formed on the base 5 having the required shape and the through hole 14 may be formed in the base 5. This aspect can provide a manufacturing method capable of improving the manufacturing efficiency of the interior material in which the molded part is bonded to the base material.
Here, the molding of the material includes press molding, injection molding, and the like. That is, the material mold includes a press mold, an injection mold, and the like. To mold the material, press the material sheet containing air into the base material of the required shape containing air with a press mold, or form the base material of the required shape while injecting the material into the injection mold and foaming. Injection molding, etc. are included.
Note that the remarks of the above aspect 3 are the same in the following aspects.
Further, although not included in the above-described aspect 3, the present technology also includes a case where the structure for forming the through hole in the base material is not provided in the material mold and the through hole is formed in a separate process.

[態様4]
図6〜10に例示するように、前記型面330は、前記一般面340、及び、前記基材5のうちゲート316の周囲にある第一周囲部11を該第一周囲部11の周囲にある第二周囲部12よりも圧縮させる押圧部350を含んでもよい。前記基材形成工程ST1では、熱可塑性の材料を含む素材(20)を前記基材5に成形してもよい。前記射出工程ST3では、型締め前に前記熱可塑性の材料の融点未満とされた前記基材5が配置された前記射出成形型310の前記キャビティCA1に前記ゲート316から前記貫通孔14を介して前記樹脂R1を射出してもよい。本製造方法は、前記樹脂による成形部50とともに前記基材5を前記射出成形型310から取り出し、前記押圧部350により圧縮された前記第一周囲部11の厚みの少なくとも一部が復元した前記基材5の少なくとも裏面10bに前記成形部50が接合された前記車両用内装材1を得る取出工程ST4をさらに含んでもよい。
[Aspect 4]
As illustrated in FIGS. 6 to 10, the mold surface 330 includes the general surface 340 and the first peripheral portion 11 around the gate 316 in the base material 5 around the first peripheral portion 11. A pressing portion 350 that compresses the second peripheral portion 12 may be included. In the base material forming step ST1, a raw material (20) containing a thermoplastic material may be formed on the base material 5. In the injection step ST3, the cavity CA1 of the injection mold 310 on which the base material 5 that has been made less than the melting point of the thermoplastic material before mold clamping is placed from the gate 316 through the through-hole 14. The resin R1 may be injected. In the present manufacturing method, the base 5 is taken out from the injection mold 310 together with the molded part 50 made of the resin, and at least a part of the thickness of the first peripheral part 11 compressed by the pressing part 350 is restored. It may further include an extraction step ST4 for obtaining the vehicle interior material 1 in which the molding part 50 is bonded to at least the back surface 10b of the material 5.

上記態様4では、射出成形型310に配置された基材5のうちゲート316の周囲にある第一周囲部11が該第一周囲部11の周囲にある第二周囲部12よりも圧縮される。従って、ゲート316から型面330の一般面340と基材5の表面(15,10b)との間に樹脂R1が入り込むという樹脂漏れ、すなわち、樹脂R1が基材5の表面に浸み出すという樹脂漏れが抑制される。その結果、射出圧力を高めることにより、ゲートから射出された樹脂が流れる最大の長さを意味する限界流動長を増やすことが可能となる。
また、射出成形型310に配置された基材5が熱可塑性の材料の融点以上あると変形してキャビティCA1に入り込み、成形部50が形成されるべきキャビティCA1における樹脂R1の流れが妨げられる懸念がある。キャビティCA1内の樹脂R1の流れが妨げられると、成形部50の一部が形成されない可能性が考えられる。本技術の態様4では、射出成形型310に配置される基材5が型締め前に熱可塑性の材料の融点未満とされているので、基材5の変形が抑制されて基材5がキャビティCA1に入り込み難くなり、樹脂R1の流動性が向上する。これにより、良好な成形部50が形成される。従って、本態様は、ゲート周りからの樹脂漏れを抑制しながら良好な成形部を形成することが可能な新規の製造方法を提供することができる。
さらに、成形部50とともに基材5を射出成形型310から取り出すと、基材5において押圧部350により圧縮された第一周囲部11の厚みの少なくとも一部が復元する。これにより、局所的に強い押圧による内装材の劣化が抑制される。
In the aspect 4, the first peripheral portion 11 around the gate 316 in the base material 5 arranged in the injection mold 310 is compressed more than the second peripheral portion 12 around the first peripheral portion 11. . Accordingly, the resin leaks that the resin R1 enters between the gate 316 and the general surface 340 of the mold surface 330 and the surface (15, 10b) of the substrate 5, that is, the resin R1 oozes out to the surface of the substrate 5. Resin leakage is suppressed. As a result, by increasing the injection pressure, it becomes possible to increase the critical flow length, which means the maximum length through which the resin injected from the gate flows.
Further, there is a concern that the base material 5 disposed in the injection mold 310 is deformed and enters the cavity CA1 when the temperature of the thermoplastic material is equal to or higher than the melting point of the thermoplastic material, and the flow of the resin R1 in the cavity CA1 where the molding part 50 is to be formed is hindered. There is. If the flow of the resin R1 in the cavity CA1 is hindered, there is a possibility that a part of the molded part 50 is not formed. In the aspect 4 of the present technology, since the base material 5 disposed in the injection mold 310 is set to be lower than the melting point of the thermoplastic material before the mold clamping, the deformation of the base material 5 is suppressed and the base material 5 is the cavity. It becomes difficult to enter CA1, and the fluidity of the resin R1 is improved. Thereby, the favorable shaping | molding part 50 is formed. Therefore, this aspect can provide a novel manufacturing method capable of forming a good molded part while suppressing resin leakage from around the gate.
Furthermore, when the base material 5 is taken out from the injection mold 310 together with the molding part 50, at least a part of the thickness of the first peripheral part 11 compressed by the pressing part 350 in the base material 5 is restored. Thereby, deterioration of the interior material due to locally strong pressing is suppressed.

ここで、基材の第一周囲部は、ゲートの周囲に限定された部位でもよいし、成形部に沿った部位等を含んでもよい。ゲートの周囲は、ゲートから離れた部位でもよく、ゲート周りの成形部の周囲が含まれる。型面の押圧部は、ゲートの周囲のうちキャビティを除く部位でもよい。従って、基材の第一周囲部は、ゲートの周囲のうち成形部を除く部位でもよい。
取出工程で得られる内装材は、不要部分を切除する前の内装材でもよい。
尚、上記態様4の付言は、以下の態様も同様である。
Here, the first peripheral portion of the substrate may be a portion limited to the periphery of the gate, or may include a portion along the molding portion. The periphery of the gate may be a part away from the gate, and includes the periphery of the molding around the gate. The pressing portion of the mold surface may be a portion excluding the cavity around the gate. Accordingly, the first peripheral portion of the base material may be a portion excluding the molding portion around the gate.
The interior material obtained in the extraction step may be an interior material before the unnecessary portion is cut off.
Note that the remarks of the above aspect 4 are the same in the following aspects.

[態様5]
図6,7,10に例示するように、前記型面330は、前記基材5の意匠面15側に前記押圧部350を含んでもよい。ゲート周りの樹脂漏れは、型面330において押圧部350が基材5の裏面10b側にある場合よりも基材5の意匠面15側にある方が起き難い。本態様では、型面330において押圧部350が基材5の意匠面15側にあるので、ゲート周りからの樹脂漏れをさらに抑制しながら良好な成形部を形成することが可能な製造方法を提供することができる。
[Aspect 5]
As illustrated in FIGS. 6, 7, and 10, the mold surface 330 may include the pressing portion 350 on the design surface 15 side of the base material 5. The resin leakage around the gate is less likely to occur on the design surface 15 side of the base material 5 than when the pressing portion 350 is on the back surface 10b side of the base material 5 on the mold surface 330. In this aspect, since the pressing portion 350 is on the design surface 15 side of the base 5 in the mold surface 330, a manufacturing method capable of forming a good molded portion while further suppressing resin leakage from around the gate is provided. can do.

[態様6]
さらに、図3,4等に例示するように、本技術の車両用内装材1は、意匠面15から裏面10bに繋がる貫通孔14を有する成形された基材5と、該基材5の少なくとも裏面10bに接合された樹脂R1の成形部50であって前記貫通孔14を通って前記基材5の意匠面15側にある樹脂射出用のゲート316の跡60に繋がった成形部50と、を備える、態様を有する。
[Aspect 6]
Furthermore, as illustrated in FIGS. 3 and 4 and the like, the vehicle interior material 1 of the present technology includes a molded base material 5 having a through-hole 14 connected from the design surface 15 to the back surface 10b, and at least the base material 5. A molded part 50 of the resin R1 joined to the back surface 10b and connected to the trace 60 of the resin injection gate 316 on the design surface 15 side of the substrate 5 through the through-hole 14; It has an aspect provided with.

上述したように、射出成形型310に対して樹脂R1の射出装置320を基材5の意匠面15側に配置すると、射出成形型310において基材5の裏面10bに接合される樹脂R1の成形部50を形成する構造の設計自由度が向上する。従って、本態様は、裏面に形状の自由度が高い樹脂射出成形部が接合された新規の車両用内装材を提供することができる。   As described above, when the injection device 320 for the resin R1 is disposed on the design surface 15 side of the base material 5 with respect to the injection mold 310, the molding of the resin R1 bonded to the back surface 10b of the base material 5 in the injection mold 310 is performed. The degree of freedom in designing the structure forming the portion 50 is improved. Therefore, this aspect can provide a novel vehicle interior material in which a resin injection molded portion having a high degree of freedom in shape is joined to the back surface.

[態様7]
図7,9等に例示するように、前記基材5は、前記ゲート316の跡60の周囲にある第一周囲部11、及び、該第一周囲部11の周囲にある第二周囲部12を有してもよい。前記第一周囲部11は、前記第二周囲部12よりも薄くてもよい。上述したように、射出成形型310に配置された基材5のうちゲート316の周囲にある第一周囲部11が該第一周囲部11の周囲にある第二周囲部12よりも圧縮されると、樹脂が基材5の表面に浸み出すという樹脂漏れが抑制される。従って、本態様は、成形部が接合された面に樹脂漏れが発生することが抑制された新規の車両用内装材を提供することができる。
[Aspect 7]
As illustrated in FIGS. 7, 9, etc., the base material 5 includes a first peripheral portion 11 around the trace 60 of the gate 316 and a second peripheral portion 12 around the first peripheral portion 11. You may have. The first peripheral portion 11 may be thinner than the second peripheral portion 12. As described above, the first peripheral portion 11 around the gate 316 in the base material 5 arranged in the injection mold 310 is compressed more than the second peripheral portion 12 around the first peripheral portion 11. And the resin leak that the resin oozes out on the surface of the base material 5 is suppressed. Therefore, this aspect can provide a novel vehicle interior material in which the occurrence of resin leakage is suppressed on the surface where the molded part is joined.

[態様8]
また、図7に例示するように、前記基材5の意匠面15は、前記第二周囲部12よりも前記第一周囲部11の方が凹んでいてもよい。上述したように、ゲート周りの樹脂漏れは、基材5においてゲート316の無い裏面10b側よりもゲート316のある意匠面15側の方が起き易く、基材5の意匠面15において第一周囲部11が第二周囲部12よりも圧縮されると樹脂R1が基材5の意匠面15に浸み出すという樹脂漏れが抑制される。従って、本態様は、成形部近傍の意匠面に樹脂漏れが発生することが抑制された新規の車両用内装材を提供することができる。
[Aspect 8]
In addition, as illustrated in FIG. 7, the design surface 15 of the base material 5 may be recessed in the first peripheral portion 11 than in the second peripheral portion 12. As described above, the resin leakage around the gate is more likely to occur on the design surface 15 side with the gate 316 than on the back surface 10 b side without the gate 316 in the base material 5, and the first periphery on the design surface 15 of the base material 5. When the portion 11 is compressed more than the second peripheral portion 12, the resin leakage that the resin R1 oozes out to the design surface 15 of the base material 5 is suppressed. Therefore, this aspect can provide a novel vehicle interior material in which the occurrence of resin leakage is suppressed on the design surface near the molded part.

(2)本技術の製造方法により製造される車両用内装材の具体例:
図1は、自動車の内装の例を側面部の図示が省略された状態で示している。図2は、車両用内装材の例を車室側から見て示している。図3は、補強リブ及びゲート跡を通る位置における車両用内装材の断面の例を模式的に示している。図4は、加飾部及びゲート跡を通る位置における車両用内装材の断面の例を模式的に示している。これらの図中、FRONT、REAR、UP、DOWNは、それぞれ、前、後、上、下を示す。左右の位置関係は、自動車100から前を見る方向を基準とする。また、符号D1は自動車100の前後方向を示し、符号D2は自動車100の上下方向を示し、符号D3は車両用内装材1の厚み方向を示し、符号D4は補強リブ51の延びた方向を示し、符号D5は基材5に沿った方向を示す。図2に示す補強リブ51の延びた方向D4は、基材5に沿った方向D5に含まれる。図4では、一つの加飾部52、及び、その周辺を示している。
(2) Specific examples of vehicle interior materials manufactured by the manufacturing method of the present technology:
FIG. 1 shows an example of the interior of an automobile in a state in which the illustration of the side portion is omitted. FIG. 2 shows an example of a vehicle interior material as viewed from the passenger compartment side. FIG. 3 schematically shows an example of a cross section of the vehicle interior material at a position passing through the reinforcing rib and the gate mark. FIG. 4 schematically shows an example of a cross section of the vehicle interior material at a position passing through the decoration portion and the gate mark. In these figures, FRONT, REAR, UP, and DOWN indicate front, rear, upper, and lower, respectively. The positional relationship between the left and right is based on the direction of looking forward from the automobile 100. Reference sign D1 indicates the longitudinal direction of the automobile 100, reference sign D2 indicates the vertical direction of the automobile 100, reference sign D3 indicates the thickness direction of the vehicle interior material 1, and reference sign D4 indicates the direction in which the reinforcing rib 51 extends. , D5 indicates a direction along the substrate 5. The extending direction D4 of the reinforcing rib 51 shown in FIG. 2 is included in the direction D5 along the base material 5. In FIG. 4, one decoration part 52 and its periphery are shown.

図1に示す自動車100は、道路上で使用されるように設計及び装備された路上走行自動車とされ、例えば、鋼板製といった金属製の車体パネル105(図4参照)が車室SP1及び荷室SP2を囲んで車体を形成している。また、図1に示す自動車100は、後部の荷室SP2が車室SP1と繋がり、2列のシート101(前席と後席)を備えるワゴンタイプの乗用自動車とされている。むろん、本技術を適用可能な自動車には、3列シートタイプといった2列シートタイプ以外の自動車も含まれ、いわゆるステーションワゴンやワンボックスカー等の他、セダンタイプ等の自動車も含まれる。   An automobile 100 shown in FIG. 1 is a road traveling automobile designed and equipped to be used on a road. For example, a metal body panel 105 (see FIG. 4) such as a steel plate includes a vehicle compartment SP1 and a cargo compartment. A vehicle body is formed surrounding SP2. Further, the automobile 100 shown in FIG. 1 is a wagon type passenger automobile in which a rear luggage compartment SP2 is connected to the passenger compartment SP1 and includes two rows of seats 101 (front seat and rear seat). Of course, automobiles to which the present technology can be applied include automobiles other than the two-row seat type such as the three-row seat type, and also include so-called station wagons, one-box cars, etc., and sedan-type automobiles.

自動車100の車体パネルには、室内(SP1,SP2)側において種々の内装材1が配置されている。荷室SP2から側方にあるデッキサイドパネル(車体パネルの例)には、荷室SP2側においてデッキサイドトリム111(内装材1の例)が設置されている。車室SP1から側方にあるドアパネル(車体パネルの例)には、車室SP1側においてドアトリム112(内装材1の例)が設置されている。同じく車室SP1から側方にあるピラー(車体パネルの例)には、車室SP1側においてピラートリム113(内装材1の例)が設置されている。車室SP1及び荷室SP2から上方にあるルーフパネル(車体パネルの例)には、室内(SP1,SP2)側においてルーフトリム114(内装材1の例)が設置されている。   Various interior materials 1 are disposed on the interior (SP1, SP2) side of the body panel of the automobile 100. A deck side trim 111 (an example of the interior material 1) is installed on the deck side panel (an example of the vehicle body panel) on the side from the cargo compartment SP2 on the cargo compartment SP2 side. A door trim 112 (an example of the interior material 1) is installed on the side of the vehicle compartment SP1 on a door panel (an example of a vehicle body panel) located on the side from the vehicle compartment SP1. Similarly, a pillar trim 113 (an example of the interior material 1) is installed on a side of the pillar (an example of the vehicle body panel) from the passenger compartment SP1 on the side of the passenger compartment SP1. A roof trim 114 (an example of the interior material 1) is installed on the interior side (SP1, SP2) side of the roof panel (an example of the vehicle body panel) above the passenger compartment SP1 and the cargo compartment SP2.

図2〜4は、内装材1の例としてデッキサイドトリムの例を示している。図3に示すデッキサイドトリム111では、凹凸を有する所要形状に成形された基材本体10の表面10aと表皮材30のバッキング40とが接着し、基材5の意匠面15及び裏面10bの一部に樹脂製の成形部50が一体的に射出成形されている。図2〜4に示す成形部50には、基材5の裏面10b側にある補強リブ51、及び、基材5の貫通孔14を通っている加飾部52が含まれる。基材5が表皮材30を有している場合、表皮材30は基材5の意匠面15となる。図3,4に示す基材本体10の裏面10bは、基材5全体の裏面である。   2 to 4 show an example of a deck side trim as an example of the interior material 1. In the deck side trim 111 shown in FIG. 3, the surface 10a of the base body 10 molded into a required shape having irregularities and the backing 40 of the skin material 30 are bonded, and one of the design surface 15 and the back surface 10b of the base material 5 is bonded. The resin molding part 50 is integrally formed with the part by injection molding. The molded part 50 shown in FIGS. 2 to 4 includes a reinforcing rib 51 on the back surface 10 b side of the base material 5 and a decorative part 52 that passes through the through hole 14 of the base material 5. When the base material 5 has the skin material 30, the skin material 30 becomes the design surface 15 of the base material 5. A back surface 10b of the base body 10 shown in FIGS.

デッキサイドトリム111は、荷室SP2の左右の側面部に配置され、車室SP1に繋がった荷室SP2に良好な意匠を付与する。補強リブ51は、三次元形状に成形された基材5に対して、内装材としての剛性が不足しやすい外周付近や大きな平面上などに配置される。図2,4に示す加飾部52は、自動車100のドアの開閉を円滑にするための空気取り入れ口である貫通孔52eを有し、デッキサイドトリム111のルーバー部を構成する。
尚、本技術の車両用内装材は、表皮材30とバッキング40が無くてもよい。この場合、表皮材30の代わりに表面10aが車両用内装材の意匠面15となる。
The deck side trim 111 is disposed on the left and right side portions of the luggage compartment SP2, and gives a good design to the luggage compartment SP2 connected to the passenger compartment SP1. The reinforcing ribs 51 are arranged near the outer periphery or on a large plane where the rigidity as an interior material is likely to be insufficient with respect to the base material 5 formed into a three-dimensional shape. The decorative portion 52 shown in FIGS. 2 and 4 has a through-hole 52e that is an air intake for smoothly opening and closing the door of the automobile 100, and constitutes a louver portion of the deck side trim 111.
The vehicle interior material of the present technology may not have the skin material 30 and the backing 40. In this case, the surface 10a becomes the design surface 15 of the vehicle interior material instead of the skin material 30.

基材本体10には、繊維F1が集合した基材10A、発泡樹脂製の基材10B、繊維と発泡樹脂を組み合わせた基材、等の空気Arを含む基材であって、熱可塑性樹脂といった熱可塑性の材料を含む基材を用いることができる。   The base body 10 is a base material containing air Ar, such as a base material 10A in which fibers F1 are aggregated, a base material 10B made of foamed resin, a base material in which fibers and foamed resin are combined, and is a thermoplastic resin. A substrate comprising a thermoplastic material can be used.

繊維質の基材10Aには、通気性のあるプレス成形された繊維マット等、繊維F1を集合させて空気Arを含むように成形された繊維集合体を用いることができる。基材10Aは、意匠層と保形層と吸音層を積層した繊維マット等、多層構造の繊維集合体でもよい。
基材10Aを形成するための繊維F1には、熱可塑性樹脂といった合成樹脂(エラストマーを含む)の繊維、合成樹脂に添加剤を添加した繊維、ガラス繊維や炭素繊維といった無機繊維、ケナフといった植物繊維、反毛繊維、これらの少なくとも一部の組合せ、等を用いることができ、熱可塑性樹脂繊維といった熱可塑性の繊維を含む繊維が好ましい。前記熱可塑性樹脂には、ポリプロピレン(PP)樹脂やポリエチレン樹脂(PE)といったポリオレフィン樹脂、ポリエチレンテレフタレート(PET)樹脂といったポリエステル樹脂、ポリアミド(PA)樹脂、アクリル(PMMA)樹脂、等を用いることができる。繊維F1には、主繊維と接着性繊維(バインダー)が含まれてもよく、芯鞘構造やサイドバイサイド構造といったコンジュゲート構造の繊維が含まれてもよい。また、熱可塑性の繊維にガラス繊維といった無機繊維を混ぜると、基材の剛性を高めることができる。基材10Aに含まれる熱可塑性の材料は、繊維F1に含まれてもよいし、繊維F1以外の材料に含まれてもよい。
As the fibrous base material 10A, a fiber aggregate formed by collecting fibers F1 and including air Ar, such as a breathable press-molded fiber mat, can be used. The base material 10A may be a fiber assembly having a multilayer structure such as a fiber mat in which a design layer, a shape retaining layer, and a sound absorbing layer are laminated.
The fibers F1 for forming the base material 10A include synthetic resin fibers (including elastomers) such as thermoplastic resins, fibers obtained by adding additives to synthetic resins, inorganic fibers such as glass fibers and carbon fibers, and plant fibers such as kenaf. In addition, a fiber including a thermoplastic fiber such as a thermoplastic resin fiber can be used. The thermoplastic resin may be a polyolefin resin such as polypropylene (PP) resin or polyethylene resin (PE), a polyester resin such as polyethylene terephthalate (PET) resin, a polyamide (PA) resin, an acrylic (PMMA) resin, or the like. . The fiber F1 may include a main fiber and an adhesive fiber (binder), and may include a fiber having a conjugate structure such as a core-sheath structure or a side-by-side structure. In addition, when inorganic fibers such as glass fibers are mixed with thermoplastic fibers, the rigidity of the substrate can be increased. The thermoplastic material included in the base material 10A may be included in the fiber F1, or may be included in a material other than the fiber F1.

繊維質の基材10Aの厚みTbは、軽量で所要の剛性を得る点から、1mm以上、且つ、8mm以下が好ましく、2mm以上、且つ、7mm以下がより好ましい。基材10Aの目付は、軽量で所要の剛性を得る点から、450g/m2以上、且つ、1200g/m2以下が好ましい。 The thickness Tb of the fibrous base material 10A is preferably 1 mm or more and 8 mm or less, more preferably 2 mm or more and 7 mm or less from the viewpoint of obtaining light weight and required rigidity. The basis weight of the base material 10A is preferably 450 g / m 2 or more and 1200 g / m 2 or less from the viewpoint of obtaining light weight and required rigidity.

発泡樹脂製の基材10Bには、樹脂材料を発泡させて気泡(空気Ar)を含むように成形された発泡成形体を用いることができる。樹脂材料の発泡成形には、例えば、射出成形を用いることができる。また、基材10Bは、表面にスキン層を残した発泡樹脂成形品、発泡樹脂層の少なくとも一面に対して実質的に非発泡の層を積層した成形品、等、多層構造でもよい。
基材10Bを形成するための樹脂材料は、熱可塑性樹脂といった熱可塑性の材料が含まれていれば、種々の合成樹脂(エラストマーを含む)を用いることができ、添加剤が添加されてもよい。基材10Bを形成するための熱可塑性樹脂には、PP樹脂やPE樹脂といったポリオレフィン樹脂、ポリスチレン(PS)樹脂、これらの組合せ、等を用いることができ、充てん材等の添加剤が含まれてもよい。樹脂の発泡には、シリンダー内で加圧された気体を溶融樹脂に溶解させる物理発泡、化学発泡剤を添加して熱分解や化学反応により気体を溶融樹脂に混入させる化学発泡、等を採用することができる。発泡剤には、ブタンやペンタンといった炭化水素を発生させる揮発性発泡剤、アゾジカルボンアミド(ADCA)やヒドラゾジカルボンアミド等といった有機系発泡剤、炭酸アンモニウムといった炭酸ガス等を発生させる無機系発泡剤、等を用いることができる。
For the base material 10B made of foamed resin, a foamed molded body formed by foaming a resin material and including bubbles (air Ar) can be used. For example, injection molding can be used for foam molding of the resin material. Further, the base material 10B may have a multilayer structure such as a foamed resin molded product with a skin layer left on the surface, or a molded product in which a substantially non-foamed layer is laminated on at least one surface of the foamed resin layer.
As long as the resin material for forming the substrate 10B includes a thermoplastic material such as a thermoplastic resin, various synthetic resins (including elastomers) can be used, and additives may be added. . The thermoplastic resin for forming the base material 10B can be a polyolefin resin such as PP resin or PE resin, a polystyrene (PS) resin, a combination thereof, or the like, and includes additives such as fillers. Also good. For foaming of the resin, physical foaming that dissolves the gas pressurized in the cylinder into the molten resin, chemical foaming that adds a chemical foaming agent and mixes the gas into the molten resin by thermal decomposition or chemical reaction, etc. are adopted. be able to. Foaming agents include volatile blowing agents that generate hydrocarbons such as butane and pentane, organic blowing agents such as azodicarbonamide (ADCA) and hydrazodicarbonamide, and inorganic blowing agents that generate carbon dioxide gas such as ammonium carbonate. , Etc. can be used.

発泡樹脂製の基材10Bの厚みTbは、軽量で所要の剛性を得る点から、1mm以上、且つ、8mm以下が好ましく、2mm以上、且つ、7mm以下がより好ましい。基材10Bの目付は、軽量で所要の剛性を得る点から、450g/m2以上、且つ、1200g/m2以下が好ましい。 The thickness Tb of the base material 10B made of foamed resin is preferably 1 mm or more and 8 mm or less, more preferably 2 mm or more and 7 mm or less from the viewpoint of obtaining light weight and required rigidity. The basis weight of the substrate 10B is preferably 450 g / m 2 or more and 1200 g / m 2 or less from the viewpoint of obtaining light weight and required rigidity.

表皮材30には、不織布、織物、編物、カーペット、合成樹脂(エラストマーを含む)、ゴム、等を用いることができる。表皮材30の裏面には、バッキング(裏打ち層)40が形成されてもよい。バッキング40には、熱可塑性樹脂といった合成樹脂(エラストマーを含む)等を用いることができる。前記熱可塑性樹脂には、低密度ポリエチレン、エチレン酢酸ビニル、といった低融点の熱可塑性樹脂等を用いることができる。   Non-woven fabric, woven fabric, knitted fabric, carpet, synthetic resin (including elastomer), rubber, and the like can be used for the skin material 30. A backing (backing layer) 40 may be formed on the back surface of the skin material 30. For the backing 40, a synthetic resin such as a thermoplastic resin (including an elastomer) or the like can be used. As the thermoplastic resin, a low-melting-point thermoplastic resin such as low-density polyethylene or ethylene vinyl acetate can be used.

図2,3に示す樹脂製の補強リブ51は、基材裏面10bに略直交するように延出した薄板状に形成されている。補強リブの高さHrは、特に限定されないが、例えば、2〜10mm程度とすることができる。補強リブの厚みTrは、特に限定されないが、例えば、1〜5mm程度とすることができる。補強リブ51は、図5〜9に例示するように溶融樹脂R1を射出成形することにより形成することができ、意匠面15側にゲート316の跡60が形成されることがある。   The resin-made reinforcing ribs 51 shown in FIGS. 2 and 3 are formed in a thin plate shape extending so as to be substantially orthogonal to the substrate back surface 10b. The height Hr of the reinforcing rib is not particularly limited, but can be, for example, about 2 to 10 mm. The thickness Tr of the reinforcing rib is not particularly limited, but can be, for example, about 1 to 5 mm. The reinforcing rib 51 can be formed by injection molding a molten resin R1 as illustrated in FIGS. 5 to 9, and a trace 60 of the gate 316 may be formed on the design surface 15 side.

図2,4に示す樹脂製の加飾部52は、意匠面15側の加飾部52a、裏面10b側の加飾部52b、及び、両加飾部52a,52bに繋がる貫通部52dを有している。この貫通部52dは、厚み方向D3へ貫通した貫通孔52eを有し、基材5の貫通孔14を通っている。意匠面側の加飾部52aは、基材5の貫通孔14の縁部を隠している。裏面側の加飾部52bは、貫通部52dとデッキサイドパネル(車体パネル105)との間に配置された目隠し部52cを有している。   2 and 4 has a decorative part 52a on the design surface 15 side, a decorative part 52b on the back surface 10b side, and a penetrating part 52d connected to both the decorative parts 52a and 52b. doing. The through portion 52d has a through hole 52e that penetrates in the thickness direction D3 and passes through the through hole 14 of the base material 5. The decorative surface 52 a on the design surface side hides the edge of the through hole 14 of the base material 5. The decoration part 52b on the back side has a blindfold part 52c disposed between the penetrating part 52d and the deck side panel (vehicle body panel 105).

図12は、上記加飾部52が無い比較例のデッキサイドトリム900におけるルーバー部の断面を模式的に示している。デッキサイドトリム900のルーバー部には、自動車100のドアの開閉を円滑にするための貫通孔910が複数形成されている。これらの貫通孔910は、基材5に対して厚み方向D3へ貫通している。このため、室内(SP2)から貫通孔910を通して車体パネル105が見える可能性がある。車体パネル105が見えると見栄えが低下するので、基材5の裏面10b側において複数の貫通孔910をまとめて覆う目隠し部材920が基材5の裏面10bに貼り付けられている。目隠し部材920の貼り付けには、接着や溶着等といった後工程が必要である。   FIG. 12 schematically shows a cross section of a louver portion in a deck side trim 900 of a comparative example without the decorative portion 52. In the louver portion of the deck side trim 900, a plurality of through-holes 910 for smoothly opening and closing the door of the automobile 100 are formed. These through holes 910 penetrate the base material 5 in the thickness direction D3. For this reason, the vehicle body panel 105 may be visible from the room (SP2) through the through hole 910. Since the appearance of the vehicle body panel 105 is reduced, the blindfold member 920 that covers the plurality of through holes 910 together on the back surface 10 b side of the base material 5 is attached to the back surface 10 b of the base material 5. Affixing the blindfold member 920 requires a post-process such as adhesion or welding.

一方、図2,4に示すデッキサイドトリム111では、射出成形された加飾部52の目隠し部52cが貫通孔52eから車体パネル105が見えないようにしているので、室内(SP2)の意匠が向上している。むろん、目隠し部52cを配置するために接着や溶着等といった後工程は不要である。また、意匠面側の加飾部52aが基材5の貫通孔14の縁部を隠している点でも、室内(SP2)の意匠が向上している。   On the other hand, in the deck side trim 111 shown in FIGS. 2 and 4, the blindfold 52c of the injection molded decorative portion 52 prevents the vehicle body panel 105 from being seen through the through hole 52e. It has improved. Of course, a post-process such as adhesion or welding is not required to arrange the blindfold 52c. The interior (SP2) design is also improved in that the decorative surface 52a on the design surface side hides the edge of the through hole 14 of the base material 5.

加飾部52に目隠し部52cを形成するためには、図10に示すような入子型(insert die)315を有する射出成形型310を用いて樹脂R1を射出成形する必要がある。尚、入子型は、母型(master block)の中にはめ込んで使用する部分的金型であり、スライド型とも呼ばれる可動式でもよいし、固定式でもよい。基材5の裏面10b側に射出装置を配置する場合、射出装置からキャビティCA1までの溶融樹脂R1の経路が入子型315により大きく制約され、内装材の裏面形状の設計自由度が小さい。そこで、本具体例では、基材5の意匠面15側に射出装置320を配置し、内装材の裏面形状の設計自由度を向上させている。このため、意匠面側の加飾部52aにゲート316の跡60が形成されている。
尚、跡60が形成されるゲート316の位置は、影となる位置のように目立たない位置が好ましい。また、跡60を成形部50の意匠の一部にすることも、好ましい。むろん、跡60を隠す別体の部品を基材5の意匠面15(例えば成形部50)に取り付けてもよい。
In order to form the blind part 52c in the decorative part 52, it is necessary to injection-mold the resin R1 using an injection mold 310 having an insert die 315 as shown in FIG. The telescopic mold is a partial mold that is used by being inserted into a master block, and may be a movable mold called a slide mold or a fixed mold. When the injection device is arranged on the back surface 10b side of the base material 5, the path of the molten resin R1 from the injection device to the cavity CA1 is largely restricted by the insert mold 315, and the degree of freedom in designing the back surface shape of the interior material is small. Therefore, in this specific example, the injection device 320 is arranged on the design surface 15 side of the base material 5 to improve the design freedom of the back surface shape of the interior material. For this reason, the trace 60 of the gate 316 is formed in the decorative part 52a on the design surface side.
It should be noted that the position of the gate 316 where the trace 60 is formed is preferably a conspicuous position such as a shadowed position. It is also preferable to make the trace 60 a part of the design of the molded part 50. Of course, a separate part that hides the trace 60 may be attached to the design surface 15 (for example, the molded part 50) of the substrate 5.

成形部50を形成するための樹脂材料は、種々の合成樹脂(エラストマーを含む)を用いることができ、添加剤が添加されてもよく、成形の容易性の点から熱可塑性樹脂といった熱可塑性の樹脂材料が好ましい。前記熱可塑性樹脂には、PP樹脂やPE樹脂といったポリオレフィン樹脂、アクリロニトリルブタジエンスチレン(ABS)樹脂、これらの組合せ、等を用いることができ、繊維等の添加剤が含まれてもよい。樹脂材料に線膨張率が低いABS樹脂等を用いると、冷却による補強リブの収縮が抑制されて基材の反りが少ない良好な補強リブを有する内装材を得ることができる。前記繊維には、ガラス繊維や炭素繊維といった無機繊維、ケナフといった植物繊維、これらの組合せ、等を用いることができる。   Various synthetic resins (including elastomers) can be used as the resin material for forming the molded part 50, and additives may be added. From the viewpoint of ease of molding, a thermoplastic resin such as a thermoplastic resin may be used. A resin material is preferred. The thermoplastic resin may be a polyolefin resin such as PP resin or PE resin, acrylonitrile butadiene styrene (ABS) resin, a combination thereof, or the like, and may contain additives such as fibers. When an ABS resin or the like having a low coefficient of linear expansion is used as the resin material, it is possible to obtain an interior material having good reinforcing ribs in which shrinkage of the reinforcing ribs due to cooling is suppressed and the base material is less warped. As the fibers, inorganic fibers such as glass fibers and carbon fibers, plant fibers such as kenaf, combinations thereof, and the like can be used.

また、図7,9,10に示す溶融樹脂R1に発泡性の樹脂を用い、気泡を含むように射出成形された発泡樹脂で成形部50を形成してもよい。すると、溶融樹脂R1の発泡力により溶融樹脂の限界流動長を増やすことができるので、ゲートの数を減らしたり、面形状といった成形部50の形状(設計)の自由度を向上させたりすることができる。また、射出圧力を低くすることができるので、ゲート周りの樹脂漏れをさらに効果的に抑制することができ、表皮材といった内装材の劣化をさらに効果的に抑制することができる。さらに、射出樹脂の冷却による収縮がさらに抑制されるので、基材の反りもさらに効果的に抑制される。   Alternatively, a foamable resin may be used for the molten resin R1 shown in FIGS. 7, 9, and 10, and the molded part 50 may be formed of a foamed resin that is injection-molded to include bubbles. Then, since the limit flow length of the molten resin can be increased by the foaming force of the molten resin R1, the number of gates can be reduced or the degree of freedom of the shape (design) of the molded part 50 such as the surface shape can be improved. it can. Moreover, since the injection pressure can be lowered, resin leakage around the gate can be further effectively suppressed, and deterioration of the interior material such as the skin material can be further effectively suppressed. Furthermore, since shrinkage due to cooling of the injection resin is further suppressed, warping of the base material is further effectively suppressed.

発泡樹脂で成形部50を形成するための樹脂材料も、上述した種々の合成樹脂を用いることができ、添加剤が添加されてもよく、成形の容易性の点から熱可塑性樹脂といった熱可塑性の樹脂材料が好ましい。発泡樹脂製の基材10Bの場合と同様、樹脂の発泡には、シリンダー内で加圧された気体を溶融樹脂に溶解させる物理発泡、化学発泡剤を添加して熱分解や化学反応により気体を溶融樹脂に混入させる化学発泡、等を採用することができる。発泡剤には、揮発性発泡剤、有機系発泡剤、無機系発泡剤、等を用いることができる。樹脂材料には、特にPP樹脂といった熱可塑性樹脂が好適に用いられ、タルクといった充填材を例えば15〜25重量%添加したものを用いることが好ましい。タルクといった充填材を樹脂材料に添加すると、充填材が発泡の核となって発泡状態が良好になるため、基材の反りがさらに効果的に抑制される。   As the resin material for forming the molded part 50 with the foamed resin, the above-described various synthetic resins can be used, and additives may be added. From the viewpoint of ease of molding, a thermoplastic resin such as a thermoplastic resin may be used. A resin material is preferred. As in the case of the base material 10B made of a foamed resin, the foaming of the resin is performed by adding a physical foaming or chemical foaming agent that dissolves the gas pressurized in the cylinder into the molten resin, and by thermal decomposition or chemical reaction. Chemical foaming or the like mixed into the molten resin can be employed. As the foaming agent, a volatile foaming agent, an organic foaming agent, an inorganic foaming agent, or the like can be used. As the resin material, a thermoplastic resin such as a PP resin is particularly preferably used, and it is preferable to use a material added with, for example, 15 to 25% by weight of a filler such as talc. When a filler such as talc is added to the resin material, the filler becomes the core of foaming and the foamed state is improved, so that warping of the base material is further effectively suppressed.

尚、基材5に接合される成形部50は、補強リブや加飾部以外にも、クリップ取付座、内装材の開口に取り付けられる樹脂枠、等でもよい。ここで、前記クリップ取付座は、内装材を車体パネルといった相手部材に固定するためのクリップを取り付けるための部位である。前記樹脂枠には、例えば、デッキサイドトリム(内装材の例)に設けられたメンテナンスホール(開口の例)を開閉可能に覆う別体のメンテナンスカバー(サービスカバー)のツメを嵌合させることが可能な樹脂枠等がある。   In addition, the shaping | molding part 50 joined to the base material 5 may be a resin frame attached to the opening of a clip attachment seat, interior material, etc. besides a reinforcement rib and a decoration part. Here, the said clip attachment seat is a site | part for attaching the clip for fixing an interior material to counterpart members, such as a vehicle body panel. For example, a claw of a separate maintenance cover (service cover) that covers a maintenance hole (example of an opening) provided in a deck side trim (an example of an interior material) so as to be openable and closable is fitted into the resin frame. There are possible resin frames.

(3)車両用内装材の製造方法の具体例:
図5は、車両用内装材の製造方法の例を模式的に示している。図6は、基材の意匠面側に押圧部を有する射出成形型の型面の例として固定型312における型面330の要部を模式的に示している。尚、キャビティCA1はゲート316の無い可動型314における型面330にあるため、固定型312における型面330に対応するキャビティCA1の位置を二点鎖線で示している。図7は、図6のA1−A1の位置における射出成形機300の断面の例を模式的に示している。また、図7は、図6に示す射出成形型310から取り出される内装材1の基材5において意匠面15側の押圧部350により圧縮された第一周囲部11の厚みの少なくとも一部が復元する例を模式的に示している。図8は、基材の裏面側に押圧部を有する射出成形型の型面の例として可動型314における型面330の要部を模式的に示している。図9は、図8のA2−A2の位置における射出成形機300の断面の例を模式的に示している。また、図9は、図8に示す射出成形型310から取り出される内装材1の基材5において裏面10b側の押圧部350により圧縮された第一周囲部11の厚みの少なくとも一部が復元する例を模式的に示している。図10は、意匠面側キャビティを有する射出成形機300の断面の例を模式的に示している。また、図10は、意匠面側キャビティCA2を有する射出成形機300から取り出される内装材1の基材5において押圧部350により圧縮された第一周囲部11の厚みが復元する例を模式的に示している。
(3) Specific example of a method for manufacturing a vehicle interior material:
FIG. 5 schematically shows an example of a method for manufacturing a vehicle interior material. FIG. 6 schematically shows the main part of the mold surface 330 of the fixed mold 312 as an example of the mold surface of an injection mold having a pressing portion on the design surface side of the substrate. Since the cavity CA1 is on the mold surface 330 of the movable mold 314 without the gate 316, the position of the cavity CA1 corresponding to the mold surface 330 of the fixed mold 312 is indicated by a two-dot chain line. FIG. 7 schematically shows an example of a cross section of the injection molding machine 300 at the position A1-A1 in FIG. 7 shows that at least a part of the thickness of the first peripheral portion 11 compressed by the pressing portion 350 on the design surface 15 side in the base material 5 of the interior material 1 taken out from the injection mold 310 shown in FIG. 6 is restored. The example to do is shown typically. FIG. 8 schematically shows the main part of the mold surface 330 of the movable mold 314 as an example of the mold surface of an injection mold having a pressing part on the back side of the substrate. FIG. 9 schematically shows an example of a cross section of the injection molding machine 300 at the position A2-A2 in FIG. 9 shows that at least part of the thickness of the first peripheral portion 11 compressed by the pressing portion 350 on the back surface 10b side in the base material 5 of the interior material 1 taken out from the injection mold 310 shown in FIG. 8 is restored. An example is schematically shown. FIG. 10 schematically shows an example of a cross section of an injection molding machine 300 having a design surface side cavity. FIG. 10 schematically shows an example in which the thickness of the first peripheral portion 11 compressed by the pressing portion 350 in the base material 5 of the interior material 1 taken out from the injection molding machine 300 having the design surface side cavity CA2 is restored. Show.

図5〜10に示す製造方法では、所要形状の基材本体10を形成するための素材シート20(素材の例)に熱可塑性の繊維が集合した繊維集合体(すなわち、空気Arを含む繊維集合体)を用い、成形部50を射出成形するための樹脂材料に熱可塑性樹脂を用いている。本製造方法は、基材形成工程ST1、移送工程ST2、射出工程ST3、及び、取出工程ST4を含む。前記基材形成工程ST1には、プレス成形前の素材シート20をプレス成形型210(素材成形型の例)にセットする素材セット工程ST1a、及び、成形前の素材シート20をプレス成形機200でプレス成形するプレス工程ST1bが含まれる。また、基材形成工程ST1には、基材5に対して厚み方向D3へ貫通した貫通孔14を形成する孔形成工程ST5も含まれる。   In the manufacturing method shown in FIGS. 5 to 10, a fiber assembly (that is, a fiber assembly including air Ar) in which thermoplastic fibers are assembled on a material sheet 20 (an example of a material) for forming a base body 10 having a required shape. And a thermoplastic resin is used as a resin material for injection molding the molded part 50. The manufacturing method includes a base material formation step ST1, a transfer step ST2, an injection step ST3, and a removal step ST4. In the base material forming step ST1, a material setting step ST1a for setting the material sheet 20 before press molding to a press mold 210 (an example of a material molding die) and the material sheet 20 before molding by the press molding machine 200 are performed. A press process ST1b for press molding is included. The base material forming step ST1 also includes a hole forming step ST5 for forming the through hole 14 penetrating the base material 5 in the thickness direction D3.

図5に示すプレス成形機200は、プレス成形型210を構成する上型212及び下型214が近接及び離隔可能に設けられている。上型212は、内装材1の荷室SP2側の凹凸形状(所要形状の例)に合わせた型面を有する金型とされている。下型214は、基材5の裏面10bの凹凸形状(所要形状の例)に合わせた型面を有する金型とされている。図5では上型212が可動型で下型214が固定型とされているが、上型212が固定型で下型214が可動型でもよいし、両型212,214が可動型でもよい。図5に示すプレス成形型210は、基材5に貫通孔14を形成するための穿孔構造220を有している。この穿孔構造220は、上型212の型面から下型214の方へ出た穿孔用の凸部222、及び、該凸部222に対応する位置において上型212から離れるように下型214の型面から凹んだ凹部224を有している。   In the press molding machine 200 shown in FIG. 5, an upper mold 212 and a lower mold 214 constituting a press mold 210 are provided so as to be close to and away from each other. The upper mold 212 is a mold having a mold surface that matches the concavo-convex shape (example of required shape) of the interior material 1 on the cargo compartment SP2 side. The lower mold 214 is a mold having a mold surface that matches the concavo-convex shape (an example of a required shape) of the back surface 10 b of the substrate 5. In FIG. 5, the upper mold 212 is movable and the lower mold 214 is fixed. However, the upper mold 212 may be fixed and the lower mold 214 may be movable, or both molds 212 and 214 may be movable. A press mold 210 shown in FIG. 5 has a perforated structure 220 for forming the through hole 14 in the base material 5. The perforated structure 220 includes a convex portion 222 for perforating protruding from the mold surface of the upper die 212 toward the lower die 214, and the lower die 214 so as to be separated from the upper die 212 at a position corresponding to the convex portion 222. It has a recess 224 that is recessed from the mold surface.

図5に示す射出成形機300は、射出成形型310を構成する固定型312及び可動型314が近接及び離隔可能に設けられている。尚、型312を可動型にして型314を固定型にしてもよいし、両型312,314を可動型にしてもよい。   In an injection molding machine 300 shown in FIG. 5, a fixed mold 312 and a movable mold 314 that constitute an injection mold 310 are provided so as to be close to and away from each other. The mold 312 may be a movable mold and the mold 314 may be a fixed mold, or both molds 312 and 314 may be movable.

まず、図6,7に示すように、押圧部350が基材5の意匠面15側にある場合に裏面10b側に成形部50を射出成形する例を説明する。図6,7に示す固定型312は、内装材1の荷室SP2側の凹凸形状に合わせられた一般面340、及び、基材5の特定部位(第一周囲部11)を周囲よりも押圧する押圧部350を含む型面330を有する金型とされている。図6,7に示す可動型314は、基材5の裏面10bの凹凸形状に合わせられた一般面340を含む型面330を有する金型とされている。可動型314における型面330には、補強リブ51、図10に示す裏面側の加飾部52b、必要に応じてクリップ取付座、等を形成するためのキャビティCA1が形成されている。各キャビティCA1には、溶融した熱可塑性樹脂R1が射出装置320からゲート316及び貫通孔14を介して射出される。図6,7に示す押圧部350は、樹脂射出用のゲート316の周囲に形成され、基材5のうちゲート316の周囲にある第一周囲部11を該第一周囲部11の周囲にある第二周囲部12よりも厚み方向D3へ圧縮させる。   First, as shown in FIGS. 6 and 7, an example in which the molding part 50 is injection-molded on the back surface 10 b side when the pressing part 350 is on the design surface 15 side of the substrate 5 will be described. The fixed mold 312 shown in FIGS. 6 and 7 presses the general surface 340 matched with the uneven shape on the cargo compartment SP2 side of the interior material 1 and the specific portion (first peripheral portion 11) of the base material 5 from the surroundings. The mold has a mold surface 330 including a pressing portion 350 to be pressed. The movable mold 314 shown in FIGS. 6 and 7 is a mold having a mold surface 330 including a general surface 340 matched with the uneven shape of the back surface 10 b of the substrate 5. The mold surface 330 of the movable mold 314 is formed with a cavity CA1 for forming the reinforcing rib 51, the decorating part 52b on the back surface side shown in FIG. 10, and a clip mounting seat as necessary. In each cavity CA1, the molten thermoplastic resin R1 is injected from the injection device 320 through the gate 316 and the through hole 14. The pressing portion 350 shown in FIGS. 6 and 7 is formed around the resin injection gate 316, and the first peripheral portion 11 around the gate 316 in the base material 5 is around the first peripheral portion 11. The second peripheral portion 12 is compressed in the thickness direction D3.

図6,7に示すように、基材5に沿った方向D5において第一周囲部11のゲート316の外周316oから第二周囲部12までの長さW1は、押圧部350の幅W2にほぼ合わせられる。押圧部350の幅W2は、一般面340に沿った方向D6において押圧部350の内周(ゲート316の外周316o)から外周350oまでの長さである。第一周囲部11の長さW1、及び、押圧部350の幅W2は、1.5mm以上が好ましく、2.0mm以上がより好ましい。これらの長さW1,W2を前記下限以上にすると、ゲート316から所要の領域以外への樹脂漏れを効果的に抑制することができ、射出した溶融樹脂R1の限界流動長が増えるためゲートの数を効果的に減らすことができる。また、これらの長さW1,W2は、4.0mm以下が好ましく、3.0mm以下がより好ましい。これらの長さW1,W2を前記上限以下にすると、基材5において局所的に強い押圧が加わる第一周囲部11がゲート周りの狭い範囲となるので、内装材(例えば表皮材)に局所的な押圧による跡が残っても目立たず、内装材の美観の低下を抑制することができる。
尚、意匠面15に加飾部を成形する場合、上記長さW1を意匠面側キャビティの外周から第二周囲部までの長さに読み替えることができる。この場合の押圧部350は、意匠面側キャビティの外周から第二周囲部までに合わせられる。長さW1,W2の好ましい範囲は、上述の通りである。
As shown in FIGS. 6 and 7, the length W <b> 1 from the outer periphery 316 o of the gate 316 of the first peripheral portion 11 to the second peripheral portion 12 in the direction D <b> 5 along the base material 5 is substantially equal to the width W <b> 2 of the pressing portion 350. Adapted. The width W2 of the pressing portion 350 is a length from the inner periphery (the outer periphery 316o of the gate 316) to the outer periphery 350o in the direction D6 along the general surface 340. The length W1 of the first peripheral portion 11 and the width W2 of the pressing portion 350 are preferably 1.5 mm or more, and more preferably 2.0 mm or more. If these lengths W1 and W2 are equal to or greater than the lower limit, resin leakage from the gate 316 to areas other than the required region can be effectively suppressed, and the limit flow length of the injected molten resin R1 increases, so the number of gates Can be effectively reduced. Further, the lengths W1 and W2 are preferably 4.0 mm or less, and more preferably 3.0 mm or less. If these lengths W1 and W2 are made less than or equal to the above upper limit, the first peripheral portion 11 to which a strong press is locally applied in the base material 5 becomes a narrow range around the gate, so that it is locally applied to the interior material (for example, the skin material). Even if a mark due to a simple press remains, it is not conspicuous, and a decrease in the aesthetics of the interior material can be suppressed.
In addition, when shape | molding a decorating part in the design surface 15, the said length W1 can be read as the length from the outer periphery of a design surface side cavity to a 2nd surrounding part. In this case, the pressing portion 350 is adjusted from the outer periphery of the design surface side cavity to the second peripheral portion. A preferable range of the lengths W1 and W2 is as described above.

本具体例では、押圧部350及び第一周囲部11をゲート316、又は、ゲート周りの意匠面側キャビティの外周から所定範囲(長さW1,W2)内に限定しており、この所定範囲以外においてキャビティCA1及び補強リブ51に沿った押圧部や第一周囲部は無い。押圧部が広い範囲にあると押圧部の跡が広い範囲に残って内装材の意匠性が低下する可能性があるが、押圧部350及び第一周囲部11が所定範囲に限定されていることにより、局所的な強い押圧による内装材の劣化を効果的に抑制することができ、溶融樹脂R1の限界流動長も増やすことができる。   In this specific example, the pressing portion 350 and the first peripheral portion 11 are limited to a predetermined range (length W1, W2) from the outer periphery of the design surface side cavity around the gate 316 or around the gate. There is no pressing part or first peripheral part along the cavity CA1 and the reinforcing rib 51. If the pressing part is in a wide range, the mark of the pressing part may remain in a wide range and the design of the interior material may be deteriorated, but the pressing part 350 and the first peripheral part 11 are limited to a predetermined range. Thus, deterioration of the interior material due to local strong pressing can be effectively suppressed, and the limit flow length of the molten resin R1 can also be increased.

押圧部350の高さH1は、射出成形型310に配置された基材5を厚み方向D3へ圧縮する量に対応する。押圧部350の高さH1は、0.2mm以上が好ましく、0.3mm以上がより好ましい。また、基材5の厚みや材質によっては、押圧部350の高さH1は、基材5の厚みTcの15%(すなわち0.15Tc)以上が好ましく、基材5の厚みTcの20%(すなわち0.20Tc)以上がより好ましい。高さH1を前記下限以上にすると、ゲート316から所要の領域以外への樹脂漏れを効果的に抑制することができ、射出した溶融樹脂R1の限界流動長が増えるためゲートの数を効果的に減らすことができる。さらに、押圧部350の高さH1は、1.0mm以下が好ましく、0.7mm以下がより好ましい。また、基材5の厚みや材質によっては、押圧部350の高さH1は、基材5の厚みTcの35%(すなわち0.35Tc)以下が好ましく、基材5の厚みTcの30%(すなわち0.30Tc)以下がより好ましい。高さH1を前記上限以下にすると、押圧部350により押圧された跡が残り難いので、局所的な強い押圧による内装材の劣化を効果的に抑制することができる。
意匠面15に加飾部を成形する場合の高さH1の好ましい範囲も、上述の通りである。
The height H1 of the pressing part 350 corresponds to the amount by which the base material 5 arranged in the injection mold 310 is compressed in the thickness direction D3. The height H1 of the pressing part 350 is preferably 0.2 mm or more, and more preferably 0.3 mm or more. In addition, depending on the thickness and material of the base material 5, the height H1 of the pressing portion 350 is preferably 15% (that is, 0.15 Tc) or more of the thickness Tc of the base material 5, and 20% ( That is, 0.20 Tc) or more is more preferable. If the height H1 is equal to or higher than the lower limit, resin leakage from the gate 316 to a region other than the required region can be effectively suppressed, and the number of gates is effectively reduced because the limit flow length of the injected molten resin R1 increases. Can be reduced. Furthermore, the height H1 of the pressing part 350 is preferably 1.0 mm or less, and more preferably 0.7 mm or less. In addition, depending on the thickness and material of the base material 5, the height H1 of the pressing portion 350 is preferably 35% (that is, 0.35 Tc) or less of the thickness Tc of the base material 5, and 30% of the thickness Tc of the base material 5 ( That is, 0.30 Tc) or less is more preferable. When the height H1 is set to be equal to or less than the above upper limit, it is difficult to leave a mark pressed by the pressing portion 350, so that deterioration of the interior material due to local strong pressing can be effectively suppressed.
The preferable range of the height H1 when the decorative portion is formed on the design surface 15 is also as described above.

押圧部350は、図8,9に示すように基材5の裏面10b側にあってもよい。図8,9に示す可動型314は、内装材1の荷室SP2側の凹凸形状に合わせられた一般面340、及び、基材5の特定部位(第一周囲部11)を周囲よりも押圧する押圧部350を含む型面330を有する金型とされている。図8,9に示す固定型312は、基材5の裏面10bの凹凸形状に合わせられた一般面340を含む型面330を有する金型とされている。可動型314における型面330に形成された各キャビティCA1には、溶融した熱可塑性樹脂R1が射出装置320からゲート316及び貫通孔14を介して射出される。図8,9に示す押圧部350は、樹脂射出用のゲート316の周囲に形成され、基材5のうちゲート316の周囲にある第一周囲部11を該第一周囲部11の周囲にある第二周囲部12よりも厚み方向D3へ圧縮させる。   The pressing portion 350 may be on the back surface 10b side of the base material 5 as shown in FIGS. The movable mold 314 shown in FIGS. 8 and 9 presses the general surface 340 matched to the concave and convex shape on the cargo compartment SP2 side of the interior material 1 and the specific portion (first peripheral portion 11) of the base material 5 more than the surroundings. The mold has a mold surface 330 including a pressing portion 350 to be pressed. The fixed mold 312 shown in FIGS. 8 and 9 is a mold having a mold surface 330 including a general surface 340 matched with the uneven shape of the back surface 10 b of the substrate 5. In each cavity CA1 formed in the mold surface 330 of the movable mold 314, the molten thermoplastic resin R1 is injected from the injection device 320 through the gate 316 and the through hole. The pressing portion 350 shown in FIGS. 8 and 9 is formed around the resin injection gate 316, and the first peripheral portion 11 around the gate 316 of the base material 5 is around the first peripheral portion 11. The second peripheral portion 12 is compressed in the thickness direction D3.

図8,9に示すように、基材5に沿った方向D5において第一周囲部11のゲート316の外周316oから第二周囲部12までの長さW3は、押圧部350の幅W4にほぼ合わせられる。第一周囲部11の長さW3、及び、押圧部350の幅W4は、1mm以上が好ましく、1.5mm以上がより好ましい。これらの長さW3,W4を前記下限以上にすると、ゲート316から所要の領域以外への樹脂漏れを効果的に抑制することができ、射出した溶融樹脂R1の限界流動長が増えるためゲートの数を効果的に減らすことができる。また、これらの長さW3,W4は、10mm以下が好ましく、5mm以下がより好ましく、3mm以下がさらに好ましい。これらの長さW3,W4を前記上限以下にすると、基材5において局所的に強い押圧が加わる第一周囲部11がゲート周りの狭い範囲となるので、局所的に強い押圧による内装材(例えば表皮材)の劣化を効果的に抑制することができる。
尚、意匠面15に加飾部を成形する場合、上記長さW3を意匠面側キャビティの外周から第二周囲部までの長さに読み替えることができる。この場合の押圧部350は、意匠面側キャビティの外周から第二周囲部までに合わせられる。長さW3,W4の好ましい範囲は、上述の通りである。
As shown in FIGS. 8 and 9, the length W3 from the outer periphery 316o of the gate 316 of the first peripheral portion 11 to the second peripheral portion 12 in the direction D5 along the base material 5 is substantially equal to the width W4 of the pressing portion 350. Adapted. The length W3 of the first peripheral portion 11 and the width W4 of the pressing portion 350 are preferably 1 mm or more, and more preferably 1.5 mm or more. If these lengths W3 and W4 are equal to or greater than the lower limit, resin leakage from the gate 316 to areas other than the required region can be effectively suppressed, and the limit flow length of the injected molten resin R1 increases, so the number of gates Can be effectively reduced. Further, these lengths W3 and W4 are preferably 10 mm or less, more preferably 5 mm or less, and even more preferably 3 mm or less. If these lengths W3 and W4 are set to the upper limit or less, the first peripheral portion 11 to which a strong press is locally applied in the base material 5 becomes a narrow range around the gate. Deterioration of the skin material can be effectively suppressed.
In addition, when shape | molding a decorating part in the design surface 15, the said length W3 can be read as the length from the outer periphery of a design surface side cavity to a 2nd peripheral part. In this case, the pressing portion 350 is adjusted from the outer periphery of the design surface side cavity to the second peripheral portion. A preferable range of the lengths W3 and W4 is as described above.

押圧部350の高さH3は、0.2mm以上が好ましく、0.3mm以上がより好ましい。高さH3を前記下限以上にすると、ゲート316から所要の領域以外への樹脂漏れを効果的に抑制することができ、射出した溶融樹脂R1の限界流動長が増えるためゲートの数を効果的に減らすことができる。また、押圧部350の高さH3は、1.0mm以下が好ましく、0.7mm以下がより好ましい。高さH3を前記上限以下にすると、基材5において局所的に強い押圧が加わる第一周囲部11がゲート周りの狭い範囲となるので、局所的に強い押圧による内装材の劣化を効果的に抑制することができる。   The height H3 of the pressing part 350 is preferably 0.2 mm or more, and more preferably 0.3 mm or more. When the height H3 is equal to or higher than the lower limit, resin leakage from the gate 316 to a region other than the required region can be effectively suppressed, and the number of gates is effectively reduced because the limit flow length of the injected molten resin R1 increases. Can be reduced. Further, the height H3 of the pressing portion 350 is preferably 1.0 mm or less, and more preferably 0.7 mm or less. When the height H3 is less than or equal to the above upper limit, the first peripheral portion 11 to which a strong press is locally applied in the base material 5 is in a narrow range around the gate. Can be suppressed.

試験を行ったところ、基材5の裏面10b側に押圧部350があるよりも基材5の意匠面15側に押圧部350がある方が、ゲート316又は意匠面側キャビティから所要の領域以外への樹脂漏れが効果的に抑制されることが判った。従って、押圧部350は、基材5の裏面10b側にあるよりも、基材5の意匠面15側にある方が、好ましい。   When the test was performed, the direction in which the pressing portion 350 is on the design surface 15 side of the base material 5 is not the required region from the gate 316 or the design surface side cavity than the pressing portion 350 is on the back surface 10b side of the base material 5. It was found that resin leakage into the water was effectively suppressed. Therefore, it is preferable that the pressing portion 350 is on the design surface 15 side of the base material 5 rather than the back surface 10b side of the base material 5.

射出成形型310は、図10に示すように型締め時に基材5の貫通孔14を介してキャビティCA1と繋がる意匠面側キャビティCA2を有していてもよい。図10に示す固定型312は、一般面340及び押圧部350を含む型面330を有し、意匠面15側の加飾部52aを形成するための意匠面側キャビティCA2が形成されている。基材5の裏面10b側には、母型である可動型314と入子型315が配置されている。裏面10b側の加飾部52bを形成するためのキャビティCA1は、可動型314と入子型315とで形成される。図10に示す可動型314及び入子型315は、基材5の裏面10bの凹凸形状に合わせられた一般面340を含む型面330を有する。基材5に沿った方向D5において第一周囲部11の意匠面側キャビティCA2の外周から第二周囲部12までの長さW1、及び、押圧部350の幅W2は、上述したように、1.5〜4.0mmが好ましく、2.0〜3.0mmがより好ましい。押圧部350の高さH1の好ましい範囲も、上述の通りである。   As shown in FIG. 10, the injection mold 310 may have a design surface side cavity CA2 that is connected to the cavity CA1 through the through hole 14 of the base material 5 when the mold is clamped. A fixed mold 312 shown in FIG. 10 has a mold surface 330 including a general surface 340 and a pressing portion 350, and a design surface side cavity CA2 for forming a decorative portion 52a on the design surface 15 side is formed. On the back surface 10 b side of the base material 5, a movable mold 314 and a nested mold 315 that are mother molds are arranged. A cavity CA1 for forming the decorative portion 52b on the back surface 10b side is formed by a movable mold 314 and a telescopic mold 315. The movable mold 314 and the nested mold 315 shown in FIG. 10 have a mold surface 330 including a general surface 340 that is matched with the uneven shape of the back surface 10 b of the base material 5. As described above, the length W1 from the outer periphery of the design surface side cavity CA2 of the first peripheral portion 11 to the second peripheral portion 12 and the width W2 of the pressing portion 350 in the direction D5 along the substrate 5 are 1 0.5 to 4.0 mm is preferable, and 2.0 to 3.0 mm is more preferable. The preferable range of the height H1 of the pressing part 350 is also as described above.

尚、図5に示すように、意匠面15側のゲート316から裏面10b側のホットランナー317を介してキャビティCA1に溶融樹脂R1を射出してもよい。この場合には、基材5の裏面10b側に連絡口318の跡が残ることになる。   As shown in FIG. 5, the molten resin R1 may be injected into the cavity CA1 from the gate 316 on the design surface 15 side through the hot runner 317 on the back surface 10b side. In this case, a trace of the communication port 318 remains on the back surface 10b side of the base material 5.

次に、図5に示す各工程の詳細を順に説明する。
最初の素材セット工程ST1aでは、所要形状が付与されていない素材シート20を熱可塑性の材料の軟化点以上、好ましくは熱可塑性の材料の融点以上に加熱して型212,214の間にセットする。尚、図5には示していないが、素材シート20の表面20aに表皮材30と必要に応じてバッキング40等を重ねてもよい。この場合、表皮材30と必要に応じてバッキング40等も加熱しプレス成形前の素材シート20の表面20a側に重ねて型212,214の間にセットすればよい。むろん、素材シート20と表皮材30と必要に応じてバッキング40が原反状態で一体となっている場合、同時に加熱してもよい。加熱された素材シート20が接着機能を有する場合、表皮材30やバッキング40の加熱を省略してもよいし、バッキング40自体を省略してもよい。
Next, details of each step shown in FIG. 5 will be described in order.
In the first material setting step ST1a, the material sheet 20 to which the required shape is not given is heated to the softening point of the thermoplastic material or higher, preferably the melting point of the thermoplastic material or higher, and set between the molds 212 and 214. . Although not shown in FIG. 5, the skin material 30 and a backing 40 or the like may be stacked on the surface 20 a of the material sheet 20 as necessary. In this case, the skin material 30 and, if necessary, the backing 40 and the like may be heated to overlap the surface 20a side of the material sheet 20 before press molding and set between the molds 212 and 214. Of course, when the raw material sheet 20, the skin material 30, and the backing 40 are integrated in a raw fabric state as necessary, they may be heated at the same time. When the heated material sheet 20 has an adhesive function, heating of the skin material 30 and the backing 40 may be omitted, or the backing 40 itself may be omitted.

続くプレス工程ST1bでは、両型212,214を近接させて少なくとも素材シート20を三次元形状にプレス成形する。表皮材30を重ねた場合には所要形状の基材本体10(具体的には図3に示す繊維F1が集合した基材10A)と表皮材30の積層物が得られ、表皮材30とバッキング40を重ねた場合には所要形状の基材本体10とバッキング40と表皮材30の積層物が得られる。このようにして、素材シート20から所要形状の基材5にプレス成形される。このとき、穿孔構造220の凸部222が少なくとも素材シート20を貫通して凹部224とで貫通孔14を素材シート20に形成する(孔形成工程ST5)。
以上が、基材形成工程ST1である。
In the subsequent press step ST1b, at least the material sheet 20 is press-molded into a three-dimensional shape by bringing both molds 212 and 214 close to each other. When the skin material 30 is stacked, a laminate of the base material body 10 (specifically, the base material 10A in which the fibers F1 shown in FIG. 3 are assembled) and the skin material 30 are obtained. When 40 is piled up, the laminated body of the base-material main body 10, the backing 40, and the skin material 30 of a required shape is obtained. In this way, the material sheet 20 is press-molded onto the base material 5 having a required shape. At this time, the convex part 222 of the perforated structure 220 penetrates at least the raw material sheet 20 to form the through hole 14 in the raw material sheet 20 with the concave part 224 (hole forming step ST5).
The above is the base material forming step ST1.

続く移送工程ST2では、射出成形型310の外にあるプレス成形機200の両型212,214を離隔させて所要形状の基材5を取り出し、射出成形機300の型312,314の間に移してセットする。図10に示すように入子型315を用いる場合には、可動型314に入子型315を入れておく。プレス成形型210から射出成形型310に移す間に基材5は、冷えて熱可塑性の材料の融点未満となり、該熱可塑性の材料が固化されていく。尚、射出成形型310にセットされる基材5の温度は、熱可塑性の材料の軟化点未満が好ましい。基材5の温度低下は、大気中の自然冷却による温度低下でもよいし、冷風を当てる等の強制冷却による温度低下でもよい。   In the subsequent transfer step ST2, the two molds 212 and 214 of the press molding machine 200 outside the injection mold 310 are separated from each other to take out the base material 5 having a required shape and transferred between the molds 312 and 314 of the injection molding machine 300. Set. As shown in FIG. 10, when the nested mold 315 is used, the nested mold 315 is placed in the movable mold 314. During the transfer from the press mold 210 to the injection mold 310, the base material 5 is cooled to below the melting point of the thermoplastic material, and the thermoplastic material is solidified. In addition, the temperature of the base material 5 set in the injection mold 310 is preferably less than the softening point of the thermoplastic material. The temperature decrease of the base material 5 may be a temperature decrease due to natural cooling in the atmosphere, or may be a temperature decrease due to forced cooling such as applying cold air.

図6〜10で示したように押圧部350が型面330にあるので、射出成形機300の両型312,314を閉じると、すなわち、型締めすると、基材5のうち第一周囲部11が該第一周囲部11の周囲にある第二周囲部12よりも厚み方向D3へ圧縮される。図7,9では、第一周囲部11が元の厚みTcから押圧部350の高さH1,H3を差し引いた分の厚み(Tc−H1),(Tc−H3)となっていることが示されている。ここで、型締め前に基材5が熱可塑性の材料の融点未満とされて該熱可塑性の材料の固化が進んでいる。従って、押圧部350に押された第一周囲部11は、弾性変形し、復元力を有している。また、圧縮された第一周囲部11に押されることにより基材5が変形してキャビティCA1や意匠面側キャビティCA2に入り込むことが抑制されている。   As shown in FIGS. 6 to 10, since the pressing portion 350 is on the mold surface 330, when both the molds 312 and 314 of the injection molding machine 300 are closed, that is, when the mold is clamped, the first peripheral portion 11 of the substrate 5. Is compressed in the thickness direction D3 rather than the second peripheral portion 12 around the first peripheral portion 11. 7 and 9, the first peripheral portion 11 has thicknesses (Tc−H1) and (Tc−H3) obtained by subtracting the heights H1 and H3 of the pressing portion 350 from the original thickness Tc. Has been. Here, the base material 5 is set to be lower than the melting point of the thermoplastic material before mold clamping, and the thermoplastic material is solidified. Accordingly, the first peripheral portion 11 pressed by the pressing portion 350 is elastically deformed and has a restoring force. Moreover, it is suppressed that the base material 5 deform | transforms by being pressed by the compressed 1st surrounding part 11, and enters into cavity CA1 and design surface side cavity CA2.

続く射出工程ST3では、熱可塑性の材料の融点未満、好ましくは軟化点未満とされた基材5がセットされた両型312,314を閉じた型締め状態で基材5の貫通孔14を介してキャビティCA1にゲート316から溶融樹脂R1を射出する。すなわち、溶融樹脂R1は、意匠面15側のゲート316から貫通孔14を流れ、裏面10b側のキャビティCA1に流入する。図10で示したように意匠面側キャビティCA2がある場合には、意匠面側キャビティCA2及び裏面側キャビティCA1にゲート316から溶融樹脂R1を射出する。この場合、溶融樹脂R1は、意匠面15側のゲート316から意匠面側キャビティCA2に流入し、基材5の貫通孔14を通って裏面10b側のキャビティCA1に流入する。上述したように、射出成形型310に配置された基材5のうちゲート316の周囲にある第一周囲部11が該第一周囲部11の周囲にある第二周囲部12よりも圧縮されるので、ゲート316から型面330と基材裏面10bとの間に溶融樹脂R1が入り込むという樹脂漏れが抑制される。
以上により、成形部50が射出成形され、樹脂R1が固化すると空気Arを含む基材5に成形部50が接合されて固定された状態となる。図10で示した射出成形機300では、基材5の貫通孔14を介して基材5の意匠面15側と基材5の裏面10b側とに繋がった加飾部52が基材5に接合された状態となる。
In the subsequent injection step ST3, both the molds 312 and 314 on which the base material 5 set to a temperature lower than the melting point of the thermoplastic material, preferably lower than the softening point, is closed and the molds 312 and 314 are closed and closed through the through holes 14 of the base material 5. The molten resin R1 is injected from the gate 316 into the cavity CA1. That is, the molten resin R1 flows from the gate 316 on the design surface 15 side through the through hole 14 and flows into the cavity CA1 on the back surface 10b side. When the design surface side cavity CA2 is present as shown in FIG. 10, the molten resin R1 is injected from the gate 316 into the design surface side cavity CA2 and the back surface side cavity CA1. In this case, the molten resin R1 flows into the design surface side cavity CA2 from the gate 316 on the design surface 15 side, and flows into the cavity CA1 on the back surface 10b side through the through hole 14 of the base material 5. As described above, the first peripheral portion 11 around the gate 316 in the base material 5 arranged in the injection mold 310 is compressed more than the second peripheral portion 12 around the first peripheral portion 11. Therefore, the resin leak that molten resin R1 enters from the gate 316 between the mold surface 330 and the substrate back surface 10b is suppressed.
As described above, when the molded part 50 is injection-molded and the resin R1 is solidified, the molded part 50 is joined and fixed to the base material 5 containing air Ar. In the injection molding machine 300 shown in FIG. 10, the decorative portion 52 connected to the design surface 15 side of the base material 5 and the back surface 10 b side of the base material 5 through the through hole 14 of the base material 5 is formed on the base material 5. It becomes a joined state.

続く取出工程ST4では、射出成形機300の両型312,314を離隔させ、溶融樹脂R1による成形部50とともに基材5を射出成形型310から取り出す。このとき、基材5の意匠面15側にゲート316の跡60が残る。また、押圧部350により圧縮されていた第一周囲部11は、自らの復元力により、図7,9の状態ST71,ST81のように元の厚みTcにほぼ復元するか、図7,9の状態ST72,ST82のように押圧部350の跡13を若干残して元の厚みTcに近づく厚み(Tc−H2),(Tc−H4)に復元する。状態ST72,ST82では、跡13の深さH2,H4は押圧部350の高さH1,H3よりも小さいため、第一周囲部11の厚みの一部が復元したことになる。この場合、第一周囲部11が第二周囲部12よりも薄い内装材1が得られる。図7で示した内装材1は、第二周囲部12よりも第一周囲部11の方が凹んでいる。図10では元の厚みTcにほぼ復元した状態を示しているが、図10に示す場合も押圧部350の跡を若干残して元の厚みに近づく厚みに復元することがある。   In subsequent extraction step ST4, both molds 312 and 314 of the injection molding machine 300 are separated from each other, and the base material 5 is removed from the injection mold 310 together with the molded part 50 made of the molten resin R1. At this time, a trace 60 of the gate 316 remains on the design surface 15 side of the substrate 5. Further, the first peripheral portion 11 compressed by the pressing portion 350 is substantially restored to the original thickness Tc as shown in the states ST71 and ST81 of FIGS. As in the states ST72 and ST82, the traces 13 of the pressing portion 350 are left slightly and restored to the thicknesses (Tc−H2) and (Tc−H4) that approach the original thickness Tc. In the states ST72 and ST82, since the depths H2 and H4 of the trace 13 are smaller than the heights H1 and H3 of the pressing portion 350, a part of the thickness of the first peripheral portion 11 is restored. In this case, the interior material 1 in which the first peripheral portion 11 is thinner than the second peripheral portion 12 is obtained. In the interior material 1 shown in FIG. 7, the first peripheral portion 11 is recessed rather than the second peripheral portion 12. FIG. 10 shows a state in which the original thickness Tc is almost restored, but in the case shown in FIG. 10 as well, the thickness may be restored to a thickness approaching the original thickness while leaving a slight trace of the pressing portion 350.

以上より、取出工程ST4では、基材5の貫通孔14を通って意匠面15側にある樹脂射出用のゲート316の跡60に繋がった成形部50が基材5の少なくとも裏面10bに接合された内装材1を得ることになる。図10で示した射出成形機300では、基材5の貫通孔14を介して基材5の意匠面15側と基材5の裏面10b側とに繋がった加飾部52が基材5に接合された内装材1を得ることになる。   As described above, in the extraction step ST4, the molded portion 50 connected to the trace 60 of the resin injection gate 316 on the design surface 15 side through the through hole 14 of the base material 5 is joined to at least the back surface 10b of the base material 5. Interior material 1 will be obtained. In the injection molding machine 300 shown in FIG. 10, the decorative portion 52 connected to the design surface 15 side of the base material 5 and the back surface 10 b side of the base material 5 through the through hole 14 of the base material 5 is formed on the base material 5. The joined interior material 1 is obtained.

尚、基材本体10に発泡樹脂製の基材10B(図3参照)を用いる場合、例えば、貫通孔14を有する所要形状に射出成形するための素材成形型に樹脂材料(素材の例)を射出し発泡させて気泡(空気Ar)を含むように射出成形し(上記基材形成工程ST1)、得られる所要形状の発泡成形体(基材10B)を前記素材成形型から射出成形型310に移せばよい(上記移送工程ST2)。前記素材成形型から射出成形型310に移す間に基材10Bは冷えて熱可塑性の材料の融点未満(好ましくは軟化点未満)となる。射出成形型310を型締めすると、基材10Bのうち押圧部350に押された第一周囲部11は、弾性変形して第二周囲部12よりも厚み方向D3へ圧縮され、復元力を有している。上記射出工程ST3でキャビティCA1に溶融樹脂R1を射出し、上記取出工程ST4で溶融樹脂R1による補強リブ51等とともに基材10Bを射出成形型310から取り出すと、第一周囲部11の厚みの少なくとも一部が復元した基材10Bに成形部50が接合された内装材1を得ることになる。この内装材1も、貫通孔14を通って意匠面15側にあるゲート316の跡60に繋がった成形部50が基材5の少なくとも裏面10bに接合されている。   In addition, when using the base material 10B (refer FIG. 3) made from foaming resin for the base-material main body 10, for example, resin material (example of raw material) is used for the raw material shaping | molding die for carrying out injection molding to the required shape which has the through-hole 14. FIG. Injection and foaming are performed so as to include air bubbles (air Ar) (the base material forming step ST1), and the foamed product having the required shape (base material 10B) is transferred from the material molding die to the injection molding die 310. What is necessary is just to move (the said transfer process ST2). During the transfer from the raw material mold to the injection mold 310, the substrate 10B cools down to below the melting point (preferably below the softening point) of the thermoplastic material. When the injection mold 310 is clamped, the first peripheral portion 11 pressed by the pressing portion 350 in the base material 10B is elastically deformed and compressed in the thickness direction D3 more than the second peripheral portion 12, and has a restoring force. doing. When the molten resin R1 is injected into the cavity CA1 in the injection step ST3 and the base material 10B is taken out from the injection mold 310 together with the reinforcing ribs 51 and the like by the molten resin R1 in the extraction step ST4, at least the thickness of the first peripheral portion 11 is reached. The interior material 1 in which the molding part 50 is joined to the base material 10B partially restored is obtained. In the interior material 1, the molding part 50 connected to the trace 60 of the gate 316 on the design surface 15 side through the through hole 14 is joined to at least the back surface 10 b of the base material 5.

製造される内装材1は、所要形状の基材本体10が繊維F1の集合した基材10Aと発泡樹脂製の基材10Bの少なくとも一方であるので、軽量である。このような内装材1を形成するための射出成形型310に対して樹脂の射出装置320を基材5の裏面10b側に配置する必要が無いので、射出成形型310において基材5の裏面10bに接合される樹脂R1の成形部50を形成する構造の設計自由度が向上する。従って、本具体例は、射出成形による樹脂の成形部が基材の少なくとも裏面に接合された車両用内装材の裏面形状の設計自由度を向上させることができ、裏面に形状の自由度が高い樹脂射出成形部が接合された新規の車両用内装材を提供することができる。   The manufactured interior material 1 is lightweight because the base material body 10 having a required shape is at least one of a base material 10A in which fibers F1 are aggregated and a base material 10B made of foamed resin. Since it is not necessary to arrange the resin injection device 320 on the back surface 10b side of the base material 5 with respect to the injection mold 310 for forming such an interior material 1, the back surface 10b of the base material 5 in the injection mold 310 is not required. The degree of freedom in designing the structure for forming the molded portion 50 of the resin R1 to be bonded to the resin is improved. Therefore, this specific example can improve the design freedom of the back surface shape of the vehicle interior material in which the molded part of the resin by injection molding is bonded to at least the back surface of the base material, and the freedom degree of the shape is high on the back surface. It is possible to provide a new vehicle interior material to which a resin injection molded portion is joined.

また、射出成形型310に配置された基材5のうちゲート316の周囲にある第一周囲部11が該第一周囲部11の周囲にある第二周囲部12よりも圧縮されるので、ゲート周りからの樹脂漏れが抑制される。その結果、射出圧力を高めることにより、ゲート316から射出された溶融樹脂R1の限界流動長を増やすことが可能となる。
さらに、射出成形型310に配置される基材5に含まれる熱可塑性の材料の固化が進んでいるので、基材5の変形が抑制されて基材5がキャビティCA1に入り込み難くなり、溶融樹脂R1の流動性が向上する。これにより、成形部50が良好に形成される。
In addition, since the first peripheral portion 11 around the gate 316 of the base material 5 arranged in the injection mold 310 is compressed more than the second peripheral portion 12 around the first peripheral portion 11, the gate Resin leakage from the surroundings is suppressed. As a result, it is possible to increase the limit flow length of the molten resin R1 injected from the gate 316 by increasing the injection pressure.
Furthermore, since the thermoplastic material contained in the base material 5 disposed in the injection mold 310 is solidified, the deformation of the base material 5 is suppressed and the base material 5 is difficult to enter the cavity CA1, and the molten resin The fluidity of R1 is improved. Thereby, the shaping | molding part 50 is formed favorably.

さらに、成形部50とともに基材5を射出成形型310から取り出すと、基材5において押圧部350により圧縮された第一周囲部11の厚みの少なくとも一部が復元する。これにより、局所的に強い押圧による内装材1の劣化が抑制され、内装材1の品質が向上し、基材本体10に表皮材30を接合する場合には表皮材30の劣化が抑制される。
従って、本具体例は、射出成形による樹脂の成形部が基材に接合された車両用内装材を製造する際にゲート周りからの樹脂漏れを抑制し、局所的に強い押圧による内装材の劣化を抑制しながら良好な成形部を形成することが可能となる。
Furthermore, when the base material 5 is taken out from the injection mold 310 together with the molding part 50, at least a part of the thickness of the first peripheral part 11 compressed by the pressing part 350 in the base material 5 is restored. Thereby, degradation of the interior material 1 due to locally strong pressing is suppressed, the quality of the interior material 1 is improved, and when the skin material 30 is joined to the base body 10, degradation of the skin material 30 is suppressed. .
Therefore, this specific example suppresses resin leakage from around the gate when manufacturing a vehicle interior material in which a molded part of resin by injection molding is bonded to a base material, and deterioration of the interior material due to locally strong pressing. It is possible to form a good molded part while suppressing the above.

(4)変形例:
本発明は、種々の変形例が考えられる。
例えば、本技術は、ドアトリム112、ピラートリム113、ルーフトリム114、トランクの内装材、等に適用可能である。
繊維F1が集合した基材10Aと発泡樹脂製の基材10Bとが混在した基材にも、本技術を適用可能である。
孔形成工程ST5は、プレス工程ST1bとは別に実施されてもよい。例えば、プレス工程ST1bで自動車室内の凹凸形状を有する基材5を形成した後に孔形成工程ST5を実施して基材5に貫通孔14を形成することが可能である。また、先に孔形成工程ST5を実施して素材シート20に貫通孔14を形成した後にプレス工程ST1bで貫通孔14を有する所要形状の基材5を形成してもよい。
第一周囲部11を押圧する押圧部350は、相対向する位置において意匠面15側と裏面10b側の両方に配置されてもよい。
(4) Modification:
Various modifications can be considered for the present invention.
For example, the present technology is applicable to a door trim 112, a pillar trim 113, a roof trim 114, a trunk interior material, and the like.
The present technology can also be applied to a base material in which a base material 10A in which fibers F1 are aggregated and a base material 10B made of foamed resin are mixed.
The hole forming step ST5 may be performed separately from the pressing step ST1b. For example, the through hole 14 can be formed in the base material 5 by forming the base material 5 having an uneven shape in the automobile interior in the press step ST1b and then performing the hole forming step ST5. Alternatively, the substrate 5 having a required shape having the through holes 14 may be formed in the pressing step ST1b after the hole forming step ST5 is performed to form the through holes 14 in the material sheet 20.
The pressing portion 350 that presses the first peripheral portion 11 may be disposed on both the design surface 15 side and the back surface 10b side at positions facing each other.

ホットランナーを配置する都合等により射出成形型にゲートを製品の位置に設定することできない場合、ゲートを製品外の位置に設定して成形部を射出成形した後に成形部が接合された基材から製品と不要部分とを分ける裁断工程を実施してもよい。
図11は、裁断前の内装材の例を車室側から見て示している。図11の下部には、裁断線LN1と交差した長尺状の補強リブ51(成形部50の例)及びその周辺を拡大して示している。
When the gate cannot be set at the product position in the injection mold due to the placement of the hot runner, etc., after the molding part is injection-molded after setting the gate at the position outside the product and from the base material to which the molded part is joined You may implement the cutting process which separates a product and an unnecessary part.
FIG. 11 shows an example of the interior material before cutting as viewed from the passenger compartment side. In the lower part of FIG. 11, an elongated reinforcing rib 51 (an example of the molding part 50) intersecting with the cutting line LN1 and its periphery are shown in an enlarged manner.

図11に示す裁断前の内装材2は、仮想の裁断線LN1を境に、製品としての内装材1と、切除される不要部分3と、が繋がっている。ゲート316の跡60は、成形部50のうち不要部分3に形成されている。図11に示す成形部50を形成するための射出成形型310は、不要部分3の位置にあるゲート316から製品部分の方へ延出して裁断線LN1と交差した長尺状のキャビティCA1を有している。これにより、不要部分3の位置にあるゲート316から射出された溶融樹脂R1が製品部分の方へ流れて成形部50が形成される。   In the interior material 2 before cutting shown in FIG. 11, the interior material 1 as a product and the unnecessary portion 3 to be cut are connected to each other with a virtual cutting line LN1 as a boundary. The trace 60 of the gate 316 is formed in the unnecessary portion 3 of the molding portion 50. The injection mold 310 for forming the molding part 50 shown in FIG. 11 has a long cavity CA1 extending from the gate 316 at the position of the unnecessary part 3 toward the product part and intersecting the cutting line LN1. doing. As a result, the molten resin R1 injected from the gate 316 at the position of the unnecessary portion 3 flows toward the product portion, and the molding portion 50 is formed.

製品外の不要部分3では基材表面の劣化を考慮する必要が無いため、押圧部350の幅を図6,8で示した幅W2,W4よりも広くしてもよい。基材5に沿った方向D5において第一周囲部11のキャビティCA1の縁部から第二周囲部12までの長さW5、及び、一般面340に沿った方向D6においてキャビティCA1に沿った押圧部350の幅は、7mm以上が好ましく、10mm以上がより好ましい。尚、キャビティCA1に沿った押圧部350の高さは、0.2mm以上が好ましく、0.3mm以上がより好ましい。一方、型面330のうち製品に対応する部分には押圧部350が無くてもよい。これにより、押圧部350の跡が内装材1に残らず、局所的に強い押圧による内装材の劣化が効果的に抑制される。   Since it is not necessary to consider the deterioration of the substrate surface in the unnecessary portion 3 outside the product, the width of the pressing portion 350 may be wider than the widths W2 and W4 shown in FIGS. The length W5 from the edge of the cavity CA1 of the first peripheral portion 11 to the second peripheral portion 12 in the direction D5 along the base material 5, and the pressing portion along the cavity CA1 in the direction D6 along the general surface 340 The width of 350 is preferably 7 mm or more, and more preferably 10 mm or more. Note that the height of the pressing portion 350 along the cavity CA1 is preferably 0.2 mm or more, and more preferably 0.3 mm or more. On the other hand, the pressing portion 350 may not be provided in a portion of the mold surface 330 corresponding to the product. Thereby, the trace of the press part 350 does not remain in the interior material 1, and deterioration of the interior material due to locally strong pressing is effectively suppressed.

内装材1の製造方法としては、例えば、上述した工程ST1,ST2,ST3,ST4を順に実施した後、得られる裁断前の内装材2を裁断線LN1に沿って裁断して不要部分3を除去する除去工程を実施すればよい。
本具体例も、射出成形による樹脂の成形部が基材の少なくとも裏面に接合された車両用内装材の裏面形状の設計自由度を向上させることができる。
As a manufacturing method of the interior material 1, for example, after performing the above-described steps ST1, ST2, ST3, ST4 in order, the interior material 2 obtained before cutting is cut along the cutting line LN1 to remove the unnecessary portion 3 What is necessary is just to implement the removal process to perform.
Also in this specific example, the degree of freedom in designing the back surface shape of the vehicle interior material in which the resin molding portion by injection molding is joined to at least the back surface of the base material can be improved.

(5)結び:
以上説明したように、本発明によると、種々の態様により、射出成形による樹脂の成形部が基材の少なくとも裏面に接合された車両用内装材の裏面形状の設計自由度を向上させる技術等を提供することができる。むろん、独立請求項に係る構成要件のみからなる技術でも、上述した基本的な作用、効果が得られる。
また、上述した例の中で開示した各構成を相互に置換したり組み合わせを変更したりした構成、公知技術及び上述した例の中で開示した各構成を相互に置換したり組み合わせを変更したりした構成、等も実施可能である。本発明は、これらの構成等も含まれる。
(5) Conclusion:
As described above, according to the present invention, according to various aspects, a technique for improving the degree of freedom in designing the back surface shape of a vehicle interior material in which a molded portion of resin by injection molding is bonded to at least the back surface of a base material, etc. Can be provided. Needless to say, the above-described basic functions and effects can be obtained even with the technology consisting only of the constituent elements according to the independent claims.
In addition, the configurations disclosed in the above-described examples are mutually replaced or the combination is changed, the known technology and the configurations disclosed in the above-described examples are mutually replaced or the combinations are changed. The configuration described above can also be implemented. The present invention includes these configurations and the like.

1…内装材、2…裁断前の内装材、3…不要部分、5…基材、
10…基材本体、10A…繊維が集合した基材、10B…発泡樹脂製の基材、
10a…表面、10b…裏面、11…第一周囲部、12…第二周囲部、13…跡、
14…貫通孔、
15…意匠面、
20…素材シート(素材の例)、20a…表面、
30…表皮材、40…バッキング、
50…成形部、51…補強リブ、
52,52a,52b…加飾部、52c…目隠し部、52d…貫通部、52e…貫通孔、
60…跡、
100…自動車、101…シート、105…車体パネル、
111…デッキサイドトリム、112…ドアトリム、
113…ピラートリム、114…ルーフトリム、
200…プレス成形機、
210…プレス成形型(素材成形型の例)、212…上型、214…下型、
220…穿孔構造、222…凸部、224…凹部、
300…射出成形機、
310…射出成形型、312…固定型、314…可動型、315…入子型、
316…ゲート、316o…外周、320…射出装置、
330…型面、340…一般面、350…押圧部、350o…外周、
Ar…空気、CA1…キャビティ、CA2…意匠面側キャビティ、
D1…前後方向、D2…上下方向、D3…厚み方向、D4…延びた方向、
D5…基材に沿った方向、D6…一般面に沿った方向、
F1…繊維、H1,H3…押圧部の高さ、H2,H4…押圧部の跡の深さ、
R1…樹脂、
SP1…車室、SP2…荷室、
ST1…基材形成工程、ST1a…素材セット工程、ST1b…プレス工程、
ST2…移送工程、ST3…射出工程、ST4…取出工程、ST5…孔形成工程。
DESCRIPTION OF SYMBOLS 1 ... Interior material, 2 ... Interior material before cutting, 3 ... Unnecessary part, 5 ... Base material,
DESCRIPTION OF SYMBOLS 10 ... Base-material main body, 10A ... Base material which the fiber aggregated, 10B ... Base material made from foamed resin,
10a ... front surface, 10b ... back surface, 11 ... first peripheral portion, 12 ... second peripheral portion, 13 ... trace,
14 ... through hole,
15 ... Design side,
20 ... Material sheet (example of material), 20a ... Surface,
30 ... skin material, 40 ... backing,
50 ... molded part, 51 ... reinforcing rib,
52, 52a, 52b ... decorative portion, 52c ... blindfolded portion, 52d ... through portion, 52e ... through hole,
60 ... traces,
100 ... car, 101 ... seat, 105 ... body panel,
111 ... Deck side trim, 112 ... Door trim,
113 ... pillar trim, 114 ... roof trim,
200 ... press molding machine,
210 ... press mold (example of material mold), 212 ... upper mold, 214 ... lower mold,
220 ... perforated structure, 222 ... convex part, 224 ... concave part,
300 ... injection molding machine,
310 ... injection mold, 312 ... fixed mold, 314 ... movable mold, 315 ... nested mold,
316 ... Gate, 316o ... Outer periphery, 320 ... Injection device,
330 ... mold surface, 340 ... general surface, 350 ... pressing portion, 350o ... outer periphery,
Ar ... air, CA1 ... cavity, CA2 ... design surface side cavity,
D1 ... front-rear direction, D2 ... vertical direction, D3 ... thickness direction, D4 ... extended direction,
D5: direction along the substrate, D6: direction along the general surface,
F1, ... fiber, H1, H3 ... height of the pressing part, H2, H4 ... depth of the trace of the pressing part,
R1 ... resin,
SP1: Car compartment, SP2: Cargo,
ST1 ... Substrate forming step, ST1a ... Material setting step, ST1b ... Pressing step,
ST2 ... transfer process, ST3 ... injection process, ST4 ... take-out process, ST5 ... hole formation process.

Claims (8)

空気を含む基材に樹脂による成形部が接合された車両用内装材の製造方法であって、
意匠面から裏面に繋がる貫通孔を有し所要形状の前記基材を形成する基材形成工程と、
前記基材の形状に合わせられた一般面を含む型面を有しゲートが前記基材の意匠面側となりキャビティが前記基材の裏面側となる射出成形型の外から該射出成形型に前記基材を移す移送工程と、
前記基材が配置された前記射出成形型の前記キャビティに前記ゲートから前記貫通孔を介して前記樹脂を射出する射出工程と、を含む、車両用内装材の製造方法。
A method for manufacturing a vehicle interior material in which a molded part made of resin is bonded to a base material containing air,
A base material forming step of forming the base material of a required shape having a through-hole connected from the design surface to the back surface;
The injection mold has a mold surface including a general surface matched to the shape of the base material, the gate is the design surface side of the base material, and the cavity is the back side of the base material. A transfer process for transferring the substrate;
An injection step of injecting the resin from the gate through the through-hole into the cavity of the injection mold on which the base material is disposed.
前記射出成形型は、型締め時に前記基材の貫通孔を介して前記キャビティと繋がる意匠面側キャビティを有し、
前記射出工程では、前記基材が配置された前記射出成形型の前記意匠面側キャビティ及び前記キャビティに前記ゲートから前記樹脂を射出し、
前記基材の貫通孔を介して前記基材の意匠面側と前記基材の裏面側とに繋がった前記成形部が前記基材に接合された前記車両用内装材を得る、請求項1に記載の車両用内装材の製造方法。
The injection mold has a design surface side cavity connected to the cavity through a through hole of the base material at the time of clamping.
In the injection step, the resin is injected from the gate into the design surface side cavity and the cavity of the injection mold on which the base material is disposed,
The vehicle interior material according to claim 1, wherein the molding portion connected to the design surface side of the base material and the back surface side of the base material through the through hole of the base material is joined to the base material. The manufacturing method of the interior material for vehicles as described.
前記基材形成工程では、前記基材に前記貫通孔を形成するための構造を有する素材成形型で素材を前記所要形状の基材に成形するとともに前記基材に前記貫通孔を形成する、請求項1又は請求項2に記載の車両用内装材の製造方法。   In the base material forming step, a material is molded into the base material having the required shape with a material molding die having a structure for forming the through hole in the base material, and the through hole is formed in the base material. The manufacturing method of the interior material for vehicles of Claim 1 or Claim 2. 前記型面は、前記一般面、及び、前記基材のうちゲートの周囲にある第一周囲部を該第一周囲部の周囲にある第二周囲部よりも圧縮させる押圧部を含み、
前記基材形成工程では、熱可塑性の材料を含む素材を前記基材に成形し、
前記射出工程では、型締め前に前記熱可塑性の材料の融点未満とされた前記基材が配置された前記射出成形型の前記キャビティに前記ゲートから前記貫通孔を介して前記樹脂を射出し、
本製造方法は、前記樹脂による成形部とともに前記基材を前記射出成形型から取り出し、前記押圧部により圧縮された前記第一周囲部の厚みの少なくとも一部が復元した前記基材の少なくとも裏面に前記成形部が接合された内装材を得る取出工程をさらに含む、請求項1〜請求項3のいずれか一項に記載の車両用内装材の製造方法。
The mold surface includes a pressing portion that compresses the first peripheral portion around the gate of the general surface and the second peripheral portion around the first peripheral portion of the base material,
In the base material forming step, a material containing a thermoplastic material is molded into the base material,
In the injection step, the resin is injected from the gate through the through-hole to the cavity of the injection mold in which the base material, which is less than the melting point of the thermoplastic material, is placed before clamping.
In this manufacturing method, the base material is taken out from the injection mold together with the resin-molded portion, and at least a part of the thickness of the first peripheral portion compressed by the pressing portion is restored on at least the back surface of the base material. The manufacturing method of the interior material for vehicles as described in any one of Claims 1-3 which further includes the extraction process which obtains the interior material to which the said shaping | molding part was joined.
前記型面は、前記基材の意匠面側に前記押圧部を含む、請求項4に記載の車両用内装材の製造方法。   The said mold surface is a manufacturing method of the interior material for vehicles of Claim 4 which contains the said press part in the design surface side of the said base material. 意匠面から裏面に繋がる貫通孔を有する成形された基材と、
該基材の少なくとも裏面に接合された樹脂の成形部であって前記貫通孔を通って前記基材の意匠面側にある樹脂射出用のゲートの跡に繋がった成形部と、を備える、車両用内装材。
A molded substrate having a through-hole leading from the design surface to the back surface;
A molded part of resin bonded to at least the back surface of the base material, and a molded part connected to a trace of a gate for resin injection on the design surface side of the base material through the through hole. Interior material.
前記基材は、前記ゲートの跡の周囲にある第一周囲部、及び、該第一周囲部の周囲にある第二周囲部を有し、
前記第一周囲部が前記第二周囲部よりも薄い、請求項6に記載の車両用内装材。
The substrate has a first peripheral portion around the trace of the gate and a second peripheral portion around the first peripheral portion;
The vehicle interior material according to claim 6, wherein the first peripheral portion is thinner than the second peripheral portion.
前記基材は、前記ゲートの跡の周囲にある第一周囲部、及び、該第一周囲部の周囲にある第二周囲部を有し、
前記基材の意匠面は、前記第二周囲部よりも前記第一周囲部の方が凹んでいる、請求項6又は請求項7に記載の車両用内装材。
The substrate has a first peripheral portion around the trace of the gate and a second peripheral portion around the first peripheral portion;
The vehicle interior material according to claim 6 or 7, wherein the design surface of the base material is recessed in the first peripheral portion rather than in the second peripheral portion.
JP2017069712A 2017-03-31 2017-03-31 Method of producing interior material for vehicle and interior material for vehicle Pending JP2018171714A (en)

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