JP2934621B1 - Skin pasting molding method and skin pasting mold - Google Patents

Skin pasting molding method and skin pasting mold

Info

Publication number
JP2934621B1
JP2934621B1 JP11619698A JP11619698A JP2934621B1 JP 2934621 B1 JP2934621 B1 JP 2934621B1 JP 11619698 A JP11619698 A JP 11619698A JP 11619698 A JP11619698 A JP 11619698A JP 2934621 B1 JP2934621 B1 JP 2934621B1
Authority
JP
Japan
Prior art keywords
skin
mold
frame
cavity
upper mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP11619698A
Other languages
Japanese (ja)
Other versions
JPH11291251A (en
Inventor
達夫 竹下
浩治 松岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoac Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inoac Corp filed Critical Inoac Corp
Priority to JP11619698A priority Critical patent/JP2934621B1/en
Application granted granted Critical
Publication of JP2934621B1 publication Critical patent/JP2934621B1/en
Publication of JPH11291251A publication Critical patent/JPH11291251A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C45/14262—Clamping or tensioning means for the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

【要約】 【課題】 表皮にシワが入らず、さらに薄肉化や破れが
起らない表皮貼込み成形法を提供する。 【解決手段】 下型１と上型２の間に表皮５をセット
し、次いで、型閉じしてキャビティＣを形成した後、下
型１から該キャビティＣへ溶融樹脂ｇを供給して表皮一
体品Ｍを成形する表皮貼込み成形法において、上面側で
部分的に***させた面ブロック３２を形成した枠体３上
に表皮５を配設し、次いで、上型２の型閉め進行により
上型２と該枠体３とで表皮５を挟着し、その後、該枠体
３の上方付勢力に抗して上型２を下降させ、下型１のキ
ャビティ面１１に表皮５を覆着するようにして型閉じを
行う。An object of the present invention is to provide an epidermis paste molding method that does not cause wrinkles in the epidermis and does not cause thinning or tearing. SOLUTION: A skin 5 is set between a lower mold 1 and an upper mold 2 and then a mold is closed to form a cavity C. Then, a molten resin g is supplied from the lower mold 1 to the cavity C to integrate the skin. In the skin sticking molding method for molding the article M, the skin 5 is disposed on the frame 3 on which the surface block 32 partially raised on the upper surface side is formed. The skin 5 is sandwiched between the mold 2 and the frame 3, and then the upper mold 2 is lowered against the upward urging force of the frame 3, and the skin 5 is covered on the cavity surface 11 of the lower mold 1. Close the mold.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、成形品の成形過程
でその表面に表皮が一体的に貼り合わされる表皮貼込み
成形法及び表皮貼込み成形型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin pasting method and a skin pasting mold in which a skin is integrally adhered to a surface of a molded article in a molding process.

【０００２】[0002]

【従来の技術】自動車の内装部品などでは、高級感を呈
すべく合成樹脂の成形品表面に表皮が貼り合わされた表
皮一体品が多用されている。こうした表皮一体品は、例
えば図９，図１０のような表皮貼込み成形型を用いて造
られてきた。まず、表皮周縁に設けた孔７１に固定ピン
８１を挿入して枠体８上に表皮７をセットする。該固定
ピン８１で表皮７にテンションを与えて、表皮７にシワ
が出ないようにする。次いで、上型９１を下降させて下
型９２のキャビティ面に表皮７を覆着するようにして型
閉じを行い、その後、下型９２の通路９３から溶融樹脂
をキャビティＣへ供給して表皮一体品Ｍを成形するので
ある。2. Description of the Related Art For interior parts of automobiles, a skin integral product in which a skin is adhered to the surface of a synthetic resin molded product is often used in order to give a sense of quality. Such an integral skin product has been manufactured using a skin pasting mold as shown in FIGS. 9 and 10, for example. First, the fixing pin 81 is inserted into the hole 71 provided on the periphery of the skin, and the skin 7 is set on the frame 8. The fixing pin 81 applies tension to the skin 7 so that wrinkles do not appear on the skin 7. Next, the upper mold 91 is lowered to close the mold so as to cover the skin 7 on the cavity surface of the lower mold 92, and thereafter, the molten resin is supplied from the passage 93 of the lower mold 92 to the cavity C to integrate the skin. The product M is formed.

【０００３】[0003]

【発明が解決しようとする課題】しかるに、上記製法で
は、表皮一体品Ｍにコーナ部（湾曲部を含む）や深絞り
があると、固定ピン８１に規制され、ここを起点にシワ
が出来易くなっていた。また、深絞りのコーナ部では薄
肉化が進み、さらに破れの不具合まで引き起こすように
なっていた。However, according to the above-mentioned manufacturing method, if there is a corner portion (including a curved portion) or a deep drawing in the skin integral product M, it is regulated by the fixing pin 81, and wrinkles are easily formed from this point. Had become. In addition, in the deep drawing corner, the thickness has been reduced, and even the problem of breakage has been caused.

【０００４】本発明は上記問題点を解決するもので、表
皮にシワが入らず、さらに薄肉化や破れが起らない表皮
貼込み成形法及び表皮貼込み成形型を提供することを目
的とする。An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a skin pasting molding method and a skin pasting molding die which do not cause wrinkles in the skin and do not cause thinning or tearing. .

【０００５】[0005]

【課題を解決するための手段】上記目的を達成すべく、
請求項１に記載の本発明の要旨は、下型と上型の間に表
皮をセットし、次いで、型閉じしてキャビティを形成し
た後、下型から該キャビティへ溶融樹脂を供給して表皮
一体品を成形する表皮貼込み成形法において、上面側で
部分的に***させた面ブロックを形成した枠体上に表皮
を配設し、次いで、上型の型閉め進行により上型と該枠
体とで表皮を挟着し、その後、該枠体の上方付勢力に抗
して上型を下降させ、下型のキャビティ面に表皮を覆着
するようにして型閉じを行い、該型閉じ過程で、前記上
型と前記枠体との面接触で表皮を押えることにより、キ
ャビティ面の覆着に伴ない、テンションを越える外力が
働いたときに多少のズレ込みを起させ、さらに、前記面
ブロックの設置部位はその周辺の表皮を他の部分よりよ
り強固な面で挟んで保持することで、他部分より強いテ
ンションを与え、他の部分のほうからそのテンションを
緩和する力を働かせて表皮を包み込んでいくことを特徴
とする表皮貼込み成形法にある。請求項２に記載の本発
明の要旨は、凸形のキャビティ面に溶融樹脂が供給され
るゲートを設けた下型（１）と、該下型キャビティ面が
つくる凸形部分を開口させて前記キャビティ面を取り囲
む盤状体からなる枠体（３）と、該枠体との対向面をフ
ラット面にして、該枠体とで表皮周囲を挟着可能とし、
且つ前記下型とでキャビティを形成する上型（２）と、
を具備し、前記枠体は上下動可能にして下降に伴ない上
方付勢力を受けるようにし、且つ該枠体上面の一部を面
ブロックで***させ段差を設け、該段差によって該枠体
と前記上型とで表皮を挟着する際にその領域の挟着力を
その領域以外の枠体による挟着力より大にして、表皮に
テンションを与えシワになりにくい構造としたことを特
徴とする表皮貼込み成形型にある。In order to achieve the above object,
The gist of the present invention according to claim 1 is to set a skin between a lower mold and an upper mold, and then close the mold to form a cavity, and then supply a molten resin from the lower mold to the cavity to form a skin. In the skin bonding method for forming an integrated product, a skin is disposed on a frame body on which a surface block partially raised on the upper surface side is formed, and then the upper mold and the frame are moved by closing the upper mold. The upper skin is sandwiched between the body and the body, then the upper mold is lowered against the upward biasing force of the frame body, and the mold is closed so as to cover the skin on the cavity surface of the lower mold. In the process, by pressing the skin by surface contact between the upper mold and the frame body, accompanying the covering of the cavity surface, causing a slight displacement when an external force exceeding the tension acts, furthermore, Place the surface block between the surrounding skin with a stronger surface than the other parts By holding, give a strong tension than the other portion, in molding pasting epidermis, characterized in that go wrapped epidermis exerts a force to relieve the tension from towards the other parts. The gist of the present invention according to claim 2 is that the lower mold (1) in which a gate to which the molten resin is supplied is provided on the convex cavity surface and the convex portion formed by the lower mold cavity surface is opened. A frame (3) made of a disk-shaped body surrounding the cavity surface, and a flat surface facing the frame, so that the outer skin can be sandwiched between the frame and the frame;
And an upper mold (2) forming a cavity with the lower mold;
The frame body is capable of moving up and down so as to receive an upward biasing force as it descends, and a part of the upper surface of the frame body is raised by a surface block to provide a step, and the frame body and the frame are provided by the step. When the skin is sandwiched between the upper mold and the upper mold, the clamping force in the region is made larger than the clamping force by the frame body in the region other than the region, and the surface is configured to give tension to the skin and to be less wrinkled. In the pasting mold.

【０００６】請求項１，２の発明のごとく、上型と枠体
との面接触による挟着で表皮貼込み成形を行うと、限界
力を越えた外力が加わった際、表皮にズレが生じ、表皮
の薄肉化や破れが起ることはない。そして、上型と面ブ
ロックのところを一段高くした枠体とで表皮を挟着して
表皮貼込み成形を行うと、表皮はこの面ブロックの部分
で強いテンションがかかって貼り込まれるので、成形さ
れる表皮一体品にシワができにくくなる。According to the first and second aspects of the present invention, when the skin is pasted and formed by sandwiching the upper mold and the frame by surface contact, when the external force exceeding the limit force is applied, the skin is displaced. However, no thinning or tearing of the epidermis occurs. Then, when the skin is sandwiched between the upper mold and the frame body with the surface block raised one step and the skin is pasted and molded, the skin is pasted with strong tension at the part of this surface block, so molding Wrinkles are less likely to be formed on the integrated skin.

【０００７】[0007]

【実施形態】以下、本発明に係る表皮貼込み成形法及び
表皮貼込み成形型の実施形態について詳述する。図１〜
図６は本発明の表皮貼込み成形法及び表皮貼込み成形型
の一形態で、図１は型開き状態にある表皮貼込み成形型
の断面説明図、図２は図１の下型及び枠体の平面図、図
３〜図５は表皮貼込み成形過程を示す断面説明図、図６
は枠体周りの部分拡大図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the skin sticking molding method and the skin sticking mold according to the present invention will be described in detail below. Figure 1
FIG. 6 shows an embodiment of the skin pasting molding method and the skin pasting molding die of the present invention. FIG. 1 is a cross-sectional explanatory view of the skin pasting molding die in an open state, and FIG. 2 is a lower mold and a frame of FIG. FIGS. 3 to 5 are cross-sectional explanatory views showing a process of pasting and forming the skin, and FIGS.
Is a partially enlarged view around the frame.

【０００８】（１）表皮貼込み成形型 表皮貼込み成形型は、下型１と上型２と枠体３とを主要
構成要素とする。下型１は、凸形のキャビティ面１１を
形成した雄型で、固定側金型になっている。該下型内に
射出成形機や押出成形機などから送り込まれる溶融樹脂
ｇが通る通路１２を形成し、そのキャビティ面１１には
該溶融樹脂ｇをキャビティへ供給できるようゲートが設
けられる（図１）。溶融樹脂ｇは表皮一体品Ｍの成形品
Ｇを造る原料になり、その材料にはＡＢＳ樹脂，ポリプ
ロピレン，ポリエチレン，塩化ビニル樹脂等が用いられ
る。符号６は成形を終えた表皮一体品Ｍを突出すエジェ
クタピンを示す。上記凸形キャビティ面周囲の下型台座
１４には複数本の可動軸４１（ここでは４本）が設けら
れ、この可動軸上端に枠体３を固着する。(1) Skin Pasting Mold The skin pasting mold has a lower mold 1, an upper mold 2 and a frame 3 as main components. The lower mold 1 is a male mold having a convex cavity surface 11 and is a fixed mold. A passage 12 through which the molten resin g fed from an injection molding machine, an extrusion molding machine, or the like passes is formed in the lower mold, and a gate is provided on the cavity surface 11 so that the molten resin g can be supplied to the cavity (FIG. 1). ). The molten resin g is a raw material for forming a molded product G of the integral skin product M, and is made of an ABS resin, polypropylene, polyethylene, vinyl chloride resin, or the like. Reference numeral 6 denotes an ejector pin for projecting the molded integral skin product M. A plurality of movable shafts 41 (here, four) are provided on the lower mold base 14 around the convex cavity surface, and the frame 3 is fixed to the upper end of the movable shaft.

【０００９】上型２は、下型１との間に枠体３を配し
て、下型１に対向して配置される可動型である。上型２
は凹形のキャビティ面２１をもつ雌型となる。上型２の
枠体３との対向面２２は、面圧で表皮５を押さえつけて
枠体３とで表皮周囲を挟着可能とすべく、フラット面が
形成される。そして、上型２が枠体３を押えつけながら
下降し、型閉じ状態になったとき、上型２と下型１とで
キャビティＣをつくる（図４）。尚、本実施形態では、
上型２のキャビティ面２１にアンダーカットができるた
め、上型下部にスライドコア２３を設けている。The upper die 2 is a movable die having a frame 3 disposed between the lower die 1 and the lower die 1. Upper mold 2
Is a female mold having a concave cavity surface 21. A flat surface is formed on the surface 22 of the upper mold 2 facing the frame 3 so that the surface 5 can be pressed by the surface pressure so that the outer periphery of the skin can be sandwiched by the frame 3. Then, when the upper mold 2 descends while pressing the frame 3, and when the mold is closed, a cavity C is formed by the upper mold 2 and the lower mold 1 (FIG. 4). In this embodiment,
Since the cavity surface 21 of the upper mold 2 can be undercut, a slide core 23 is provided below the upper mold.

【００１０】枠体３は、下型キャビティ面１１がつくる
凸形部分を開口Ｏさせて、該キャビティ面１１を取り囲
む盤状体としている（図１，図２）。尚、図１は図２の
IV−IV線断面図である。前記可動軸４１に圧縮コイルバ
ネ４２を嵌挿させて、該可動軸上端に枠体３が水平状態
で支えられる。該枠体３は、可動軸４１によって上下動
可能となり、そして、圧縮コイルバネ４２が介在するこ
とで下降に伴ない上方付勢力を受ける構成にある。The frame 3 is a disc-shaped body surrounding the cavity surface 11 by opening the convex portion formed by the lower mold cavity surface 11 (FIGS. 1 and 2). In addition, FIG.
FIG. 4 is a sectional view taken along line IV-IV. A compression coil spring 42 is fitted into the movable shaft 41, and the frame 3 is supported on the upper end of the movable shaft in a horizontal state. The frame 3 can be moved up and down by a movable shaft 41, and receives an upward urging force as the frame 3 descends due to the interposition of a compression coil spring 42.

【００１１】前記枠体３の上面は、表皮５が載るところ
が平らに形成される。枠体３の上に貼込みに使用される
表皮５が配設され、上型２が下降して該枠体３と上型２
とで表皮５を挟着できるようにするためである。ただ
し、枠体上面の一部は面ブロック３２で***させ段差が
設けられる。具体的には、表皮貼込み成形する表皮一体
品Ｍのコーナ部や高低差の大きな深絞り部分等の領域を
一段高くしたフラット面にしている。面ブロック３２を
枠体３の基部３１に固着して、該面ブロック３２のとこ
ろを一段高くした平らな面を形成する。尚、枠体基部３
１と面ブロック３２は別物として、これらを接着等で一
体固着してもよいし、或いは両者を最初から一体形成し
たものでも構わない。面ブロック３２がつくる段差によ
って、枠体３と上型２とで表皮５を挟着する際にその領
域の挟着力がその領域以外の枠体による挟着力より大に
なり、表皮５にテンションを与えシワになりにくい構造
となる。面ブロック３２は本実施形態のような段差にせ
ず、なだらかなスロープを設けて***させた段差状とす
るのでもよい。The upper surface of the frame 3 is formed flat at the place where the skin 5 is placed. An outer skin 5 used for pasting is provided on the frame 3, and the upper mold 2 is lowered, and the frame 3 and the upper mold 2 are lowered.
This is to allow the outer skin 5 to be sandwiched between. However, a part of the upper surface of the frame is raised by the surface block 32 to provide a step. More specifically, a flat surface is formed by raising the area of the corner portion and the deep drawing portion having a large difference in height of the integrated skin product M to be pasted and formed on the skin. The surface block 32 is fixed to the base 31 of the frame 3 to form a flat surface with the surface block 32 raised one step. The frame base 3
1 and the surface block 32 may be separately fixed to each other by bonding or the like, or they may be integrally formed from the beginning. Due to the step created by the surface block 32, when the skin 5 is sandwiched between the frame 3 and the upper mold 2, the clamping force in that region becomes greater than the clamping force of the frame other than that region, and tension is applied to the skin 5. The structure is less likely to give wrinkles. The surface block 32 does not have to be a step as in the present embodiment, but may have a stepped shape in which a gentle slope is provided and raised.

【００１２】上述のごとく、枠体上面の一部だけに面ブ
ロック３２を形成するのは、もし枠体上面を全域に亘っ
て平らにしてしまうと、枠体３と上型２の全面で表皮５
を挟着することになり、絞り率の大きい所で薄肉化によ
る破れが発生しやすくなるからである。尚、表皮５に与
えるテンションをコントロールしたい場合は、図７のよ
うに面ブロック３２をいくつか分割するとよい。各面ブ
ロック３２ａ〜３２ｅの高さを変えることによって微妙
なテンション調整も可能になるからである。As described above, the formation of the face block 32 only on a part of the upper surface of the frame is because if the upper surface of the frame is flattened over the entire area, the entire surface of the frame 3 and the upper mold 2 is covered with the skin. 5
Is to be pinched, and tearing due to thinning is likely to occur at a place where the drawing ratio is large. If it is desired to control the tension applied to the skin 5, it is advisable to divide the surface block 32 as shown in FIG. This is because by changing the height of each of the surface blocks 32a to 32e, fine tension adjustment can be performed.

【００１３】本実施形態で用いられる表皮５には、塩化
ビニル樹脂，ポリプロピレン，ファブリック等の表皮層
５１に、ポリプロピレンの発泡品やソリッド、或いは不
織布等のシート状クッション材５２を裏打ちしたものが
挙げられる。The skin 5 used in the present embodiment includes a skin layer 51 made of vinyl chloride resin, polypropylene, fabric or the like, and a sheet-like cushion material 52 made of polypropylene foam, solid, or non-woven fabric. Can be

【００１４】（２）表皮貼込み成形法 表皮貼込み成形法は、前述の成形型を使用して以下のご
とく行われる。まず、成形品Ｇに被着できる大きさに裁
断した表皮５を、下型１と上型２の間に位置する枠体上
にセットする（図１，図２）。枠体３の上面はフラット
であるが、面ブロック３２のところは高さα分だけ持ち
上がった状態になる。上面側で部分的に***する面ブロ
ック３２を形成した枠体上に表皮５が配設される。面ブ
ロック３２の基部３１からの高さαは例えば０．５ｍｍ
〜３．０ｍｍの範囲にあり、具体的な高さは成形品Ｇの
コーナ部，湾曲部や深絞りの状況に応じて決定される。
必要に応じて、面ブロック３２にスペーサを入れて高さ
調整が施される。(2) Skin Pasting and Forming Method The skin pasting and forming method is performed as follows using the above-mentioned mold. First, the skin 5 cut to a size that can be attached to the molded product G is set on a frame positioned between the lower die 1 and the upper die 2 (FIGS. 1 and 2). The upper surface of the frame 3 is flat, but the surface block 32 is lifted up by the height α. The skin 5 is disposed on a frame on which a surface block 32 that is partially raised on the upper surface side is formed. The height α of the surface block 32 from the base 31 is, for example, 0.5 mm.
The specific height is determined according to the corner portion, the curved portion, and the state of the deep drawing of the molded product G.
If necessary, a spacer is inserted into the face block 32 to adjust the height.

【００１５】次いで、上型２を下降させ型閉めを進行さ
せる（図３）。この型閉め進行に伴ない、上型２は枠体
３とで表皮５を挟着し、枠体３の上方付勢力に抗してさ
らなる上型２の下降で、表皮５はテンションがかかった
状態となる。そうして、下型１のキャビティ面１１に表
皮５を覆着していくが、型閉じが進む過程で、コイルバ
ネ４２の力で表皮５に所定のテンションを与えながら凸
形の下型キャビティ面１１にうまく覆着していくことに
なる。上型２と枠体３とが面接触で表皮５を押えている
ので、テンションを越える外力が働いたときは、キャビ
ティ面１１の覆着に伴なって多少のズレ込みが起り、表
皮５の薄肉化や破れが回避される。また、従来のような
固定ピン８１で表皮５を止めて表皮の動きを規制するの
でなく、面で表皮５を押えるのでシワができにくくな
る。しかも、シワの発生し易い部位には面ブロック３２
が設置されているので、この周辺の表皮５を他の部分よ
りより強力な面で挟んで保持することになり、シワにな
ろうとする起点をなくすことができる。シワの発生は、
例えば成形品に図８のような凸形状があるところでは、
該凸形状を包み込むときの表皮がよって、重なったもの
と考えられる。図８中、線分ａ，ｂとでは表皮５の展開
率に差があるので、その差分が余ってシワが発生すると
想定される。本実施形態では、こうしたシワをつくり易
い凸形状部分を包み込む際に、面ブロック３２を設置し
て表皮５を最大限伸ばしてやることにより、シワの発生
を解消する。具体的には、シワができ易い角部等につい
て面ブロック３２で表皮５に加わる面圧調整を行う。斯
る圧力調整によって、角部に他部分より強いテンション
を与えることになり、角部のテンションが高くなるだけ
でなく、一般部（他の部分）のほうからそのテンション
を緩和する作用（図２における表皮５の矢印の流れ）が
働いて、シワや破れもなく角部を表皮５で包み込んでい
く。こうして、型閉じが完了すると、上型２と下型１と
でキャビティＣが形成され、且つ、下型１のキャビティ
面１１に表皮５がうまく覆着される（図４）。この型閉
じが完了した段階においては、表皮層５１とクッション
材５２をもつ表皮厚みｔ1 が当初２．４５ｍｍあったも
のでも、上型２と面ブロック３２で挟着された箇所では
その表皮厚みｔ2 が約０．４５ｍｍ程度までになってい
る（図６）。Next, the upper mold 2 is lowered to advance the mold closing (FIG. 3). As the mold closing progresses, the upper mold 2 sandwiches the skin 5 with the frame 3, and the upper mold 2 further lowers against the upward biasing force of the frame 3, and the skin 5 is tensioned. State. Thus, the skin 5 is covered on the cavity surface 11 of the lower mold 1. In the process of closing the mold, a predetermined lower tension is applied to the skin 5 by the force of the coil spring 42 while the convex lower cavity surface is formed. 11 will be covered well. Since the upper mold 2 and the frame 3 press the skin 5 by surface contact, when an external force exceeding the tension acts, a slight displacement occurs due to the covering of the cavity surface 11 and the skin 5 Thinning and tearing are avoided. Also, instead of stopping the outer skin 5 with the fixing pin 81 as in the related art to restrict the movement of the outer skin, the outer skin 5 is pressed against the surface, so that wrinkles are hardly generated. In addition, the surface block 32 is used in a portion where wrinkles are likely to occur.
Is provided, the surrounding skin 5 is sandwiched and held by a stronger surface than other portions, and the starting point for wrinkles can be eliminated. The occurrence of wrinkles
For example, where the molded product has a convex shape as shown in FIG.
It is considered that the skin when wrapping the convex shape was overlapped. In FIG. 8, since there is a difference in the development rate of the skin 5 between the line segments a and b, it is assumed that the difference is left and wrinkles occur. In the present embodiment, when wrapping a convex-shaped portion where such a wrinkle is likely to be formed, the surface block 32 is installed and the skin 5 is stretched to the maximum, thereby eliminating wrinkles. Specifically, the surface pressure applied to the skin 5 is adjusted by the surface block 32 at the corners or the like where wrinkles are easily formed. By such pressure adjustment, a stronger tension is applied to the corner than the other portion, and not only is the tension of the corner increased, but also the action of relaxing the tension from the general portion (other portion) (FIG. 2). The flow of the arrow of the epidermis 5 in FIG. 1 works, and the corners are wrapped in the epidermis 5 without wrinkles or tears. When the mold closing is completed, the cavity C is formed by the upper mold 2 and the lower mold 1, and the skin 5 is well covered on the cavity surface 11 of the lower mold 1 (FIG. 4). At the stage when the mold closing is completed, even if the skin thickness t1 having the skin layer 51 and the cushioning material 52 is initially 2.45 mm, the skin thickness t2 between the upper mold 2 and the face block 32 is small. Is about 0.45 mm (FIG. 6).

【００１６】続いて、通路１２，ゲート１３を利用して
キャビティＣへ溶融樹脂ｇを供給する。キャビティＣへ
供給される溶融樹脂圧により、表皮５はキャビティ面２
１へ押圧され張った状態となる（図５）。ここでも、固
定ピンで表皮５を規制しているのと違い、上型２と枠体
３とが面接触で表皮５を押えているので、表皮５が膨ら
んでキャビティ面２１へ密着するに伴ない、圧縮された
コイルバネ４２の弾撥力を越えた範囲では按配よく表皮
５のキャビティ内への多少のズレ込みが起こる。従っ
て、表皮の薄肉化や破れは生じない。かくのごとくし
て、キャビティＣ内へ充填された溶融樹脂ｇは、その
後、表皮５に覆着された状態で冷却固化して、所望の表
皮一体品Ｍとなる。尚、本実施形態の溶融樹脂ｇが冷却
固化してできる成形品Ｇの板厚は２〜３ｍｍ程度であ
る。Subsequently, the molten resin g is supplied to the cavity C using the passage 12 and the gate 13. Due to the pressure of the molten resin supplied to the cavity C, the skin 5 is moved to the cavity surface 2.
1 and is in a stretched state (FIG. 5). Again, unlike the case where the skin 5 is regulated by the fixing pin, the upper die 2 and the frame 3 press the skin 5 by surface contact, so that the skin 5 expands and comes into close contact with the cavity surface 21. In the range exceeding the elasticity of the compressed coil spring 42, some displacement of the skin 5 into the cavity occurs in a proportional manner. Therefore, the skin is not thinned or broken. As described above, the molten resin g filled in the cavity C is then cooled and solidified while being covered with the skin 5, and becomes a desired skin integrated product M. The thickness of the molded product G formed by cooling and solidifying the molten resin g of the present embodiment is about 2 to 3 mm.

【００１７】（３）効果 このように構成した表皮貼込み成形法及び表皮貼込み成
形型によれば、成形品Ｇのコーナ部やその近傍等で強く
押えておかねばならない所を、枠体３に面ブロック３２
を形成して所定のテンションを保ちながら、下型キャビ
ティ面１１さらには溶融樹脂層を覆うので、表皮一体品
Ｍの表皮５にシワができにくくなる。そして、表皮５を
張るテンションの度合はコイルバネ４２の強弱選定によ
り簡単に調整できる。さらに、枠体３と上型２との面圧
で表皮５を押えているので、下型１への覆着に伴ない表
皮５の多少のズレが容認され、深絞りのコーナ部等でも
表皮５の薄肉化や破れが起ることはない。(3) Effect According to the skin pasting method and the skin pasting die configured as described above, the frame 3 needs to be strongly pressed at the corner of the molded product G or in the vicinity thereof. Face block 32
Is formed so as to cover the lower mold cavity surface 11 and the molten resin layer while maintaining a predetermined tension, so that it is difficult to form wrinkles on the skin 5 of the skin integrated product M. Then, the degree of tension of the skin 5 can be easily adjusted by selecting the strength of the coil spring 42. Further, since the skin 5 is pressed by the surface pressure between the frame 3 and the upper mold 2, slight displacement of the skin 5 due to the covering with the lower mold 1 is allowed, and the skin is deep even at a deep drawing corner portion. No thinning or tearing of 5 occurs.

【００１８】尚、本発明においては前記実施形態に示す
ものに限られず、目的，用途に応じて本発明の範囲で種
々変更できる。下型１，上型２，枠体３，表皮５等の形
状，大きさ，材質等は用途に応じて適宜選択できる。The present invention is not limited to the embodiment described above, but can be variously modified within the scope of the present invention depending on the purpose and application. The shape, size, material, and the like of the lower mold 1, the upper mold 2, the frame 3, the skin 5, and the like can be appropriately selected depending on the application.

【００１９】[0019]

【発明の効果】以上のごとく、本発明の表皮貼込み成形
法及び表皮貼込み成形型は、表皮一体品にシワをつくら
ず、また成形過程で表皮の薄肉化や破れの不具合を引き
起こさないなど優れた効果を発揮する。As described above, the skin-paste molding method and the skin-paste molding die of the present invention do not form wrinkles on the integral skin product and do not cause problems such as thinning and tearing of the skin during the molding process. Demonstrates excellent effects.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の表皮貼込み成形型の一形態で、型開き
状態にあるその断面説明図である。FIG. 1 is an explanatory cross-sectional view of an embodiment of a skin pasting mold of the present invention in a mold open state.

【図２】図１の下型及び枠体の平面図である。FIG. 2 is a plan view of a lower mold and a frame of FIG. 1;

【図３】表皮貼込み成形過程を示す断面説明図である。FIG. 3 is an explanatory cross-sectional view showing a process of pasting and forming a skin.

【図４】表皮貼込み成形過程を示す断面説明図である。FIG. 4 is an explanatory cross-sectional view showing a process of pasting and forming a skin.

【図５】表皮貼込み成形過程を示す断面説明図である。FIG. 5 is an explanatory cross-sectional view showing a process of sticking and forming the skin.

【図６】枠体周りの部分拡大断面図である。FIG. 6 is a partially enlarged cross-sectional view around a frame.

【図７】他形態の表皮貼込み成形型の部分平面図であ
る。FIG. 7 is a partial plan view of a skin pasting mold of another embodiment.

【図８】成形品の凸形状周りの表皮のシワ発生状況の説
明斜視図である。FIG. 8 is an explanatory perspective view of a state of occurrence of wrinkles on a skin around a convex shape of a molded product.

【図９】従来技術の断面説明図である。FIG. 9 is an explanatory sectional view of a conventional technique.

【図１０】従来技術の断面説明図である。FIG. 10 is an explanatory sectional view of a conventional technique.

【符号の説明】[Explanation of symbols]

１ 下型 １１ キャビティ面 １３ ゲート ２ 上型 ２２ 対向面 ３ 枠体 ３２ 面ブロック ５ 表皮 ｇ 溶融樹脂 Ｃ キャビティ Ｍ 表皮一体品 Reference Signs List 1 lower die 11 cavity surface 13 gate 2 upper die 22 facing surface 3 frame 32 surface block 5 skin g molten resin C cavity M skin integrated product

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−156023（ＪＰ，Ａ) 特開 平10−95021（ＪＰ，Ａ) 特開 平７−308928（ＪＰ，Ａ) 実開 平４−71216（ＪＰ，Ｕ) 実開 平６−36818（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 33/12 - 33/18 B29C 45/14 - 45/16 B29C 45/26 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-156023 (JP, A) JP-A-10-95021 (JP, A) JP-A-7-308928 (JP, A) 71216 (JP, U) Hikaru Hei 6-36818 (JP, U) (58) Fields surveyed (Int. Cl. 6 , DB name) B29C 33/12-33/18 B29C 45/14-45/16 B29C 45/26

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 下型と上型の間に表皮をセットし、次い
で、型閉じしてキャビティを形成した後、下型から該キ
ャビティへ溶融樹脂を供給して表皮一体品を成形する表
皮貼込み成形法において、 上面側で部分的に***させた面ブロックを形成した枠体
上に表皮を配設し、次いで、上型の型閉め進行により上
型と該枠体とで表皮を挟着し、その後、該枠体の上方付
勢力に抗して上型を下降させ、下型のキャビティ面に表
皮を覆着するようにして型閉じを行い、該型閉じ過程
で、前記上型と前記枠体との面接触で表皮を押えること
により、キャビティ面の覆着に伴ない、テンションを越
える外力が働いたときに多少のズレ込みを起させ、さら
に、前記面ブロックの設置部位はその周辺の表皮を他の
部分よりより強固な面で挟んで保持することで、他部分
より強いテンションを与え、他の部分のほうからそのテ
ンションを緩和する力を働かせて表皮を包み込んでいく
ことを特徴とする表皮貼込み成形法。A skin is set between a lower mold and an upper mold, and then a mold is closed to form a cavity, and then a molten resin is supplied from the lower mold to the cavity to form a skin integral product. In the injection molding method, a skin is provided on a frame body on which a surface block partially raised on the upper surface side is formed, and then the skin is sandwiched between the upper mold and the frame body by closing the upper mold. Then, the upper mold is lowered against the upward biasing force of the frame, and the mold is closed so as to cover the skin on the cavity surface of the lower mold.In the mold closing process, the upper mold is closed. By pressing the skin by surface contact with the frame, accompanying the covering of the cavity surface, a slight displacement occurs when an external force exceeding the tension acts, and further, the installation site of the surface block is By holding the surrounding epidermis on a stronger surface than other parts, Give a strong tension than the portion, molding pasting the skin, characterized in that it will wrap around the skin to exert the power to alleviate the tension from the better of the other part. 【請求項２】 凸形のキャビティ面に溶融樹脂が供給さ
れるゲートを設けた下型（１）と、該下型キャビティ面
がつくる凸形部分を開口させて前記キャビティ面を取り
囲む盤状体からなる枠体（３）と、該枠体との対向面を
フラット面にして、該枠体とで表皮周囲を挟着可能と
し、且つ前記下型とでキャビティを形成する上型（２）
と、を具備し、 前記枠体は上下動可能にして下降に伴ない上方付勢力を
受けるようにし、且つ該枠体上面の一部を面ブロックで
***させ段差を設け、該段差によって該枠体と前記上型
とで表皮を挟着する際にその領域の挟着力をその領域以
外の枠体による挟着力より大にして、表皮にテンション
を与えシワになりにくい構造としたことを特徴とする表
皮貼込み成形型。2. A lower mold (1) provided with a gate to which a molten resin is supplied on a convex cavity surface, and a disc-shaped body surrounding the cavity surface by opening a convex portion formed by the lower mold cavity surface. (3) and an upper mold (2) having a flat surface facing the frame so that the outer periphery of the skin can be sandwiched between the frame and the lower mold.
The frame body is vertically movable so as to receive an upward urging force as it descends, and a part of the upper surface of the frame body is raised by a surface block to provide a step, and the frame is formed by the step. When sandwiching the epidermis between the body and the upper mold, the clamping force in the region is larger than the clamping force by the frame body in the region other than the region, and the structure is such that the tension is applied to the skin and the structure is less likely to be wrinkled. Skin pasting mold.
JP11619698A 1998-04-09 1998-04-09 Skin pasting molding method and skin pasting mold Expired - Fee Related JP2934621B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11619698A JP2934621B1 (en) 1998-04-09 1998-04-09 Skin pasting molding method and skin pasting mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11619698A JP2934621B1 (en) 1998-04-09 1998-04-09 Skin pasting molding method and skin pasting mold

Publications (2)

Publication Number Publication Date
JP2934621B1 true JP2934621B1 (en) 1999-08-16
JPH11291251A JPH11291251A (en) 1999-10-26

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ID=14681224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11619698A Expired - Fee Related JP2934621B1 (en) 1998-04-09 1998-04-09 Skin pasting molding method and skin pasting mold

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Country Link
JP (1) JP2934621B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4677643B2 (en) * 2001-02-28 2011-04-27 テック株式会社 Method for producing skin stretch molded product, and skin stretch mold used in the production method
FR2980130B1 (en) * 2011-09-19 2013-10-11 Visteon Global Tech Inc SYSTEM FOR MANUFACTURING PARTS BY THERMOFORMABLE FILM TRANSFER ON AN OVERMOLDING DEVICE

Also Published As

Publication number Publication date
JPH11291251A (en) 1999-10-26

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