JPH03272816A - Process of in-mold coat - Google Patents
Process of in-mold coatInfo
- Publication number
- JPH03272816A JPH03272816A JP6981190A JP6981190A JPH03272816A JP H03272816 A JPH03272816 A JP H03272816A JP 6981190 A JP6981190 A JP 6981190A JP 6981190 A JP6981190 A JP 6981190A JP H03272816 A JPH03272816 A JP H03272816A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- paint
- smc sheet
- coating
- injection
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 17
- 238000000576 coating method Methods 0.000 claims abstract description 41
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000003973 paint Substances 0.000 claims description 56
- 238000000465 moulding Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 101100256230 Homo sapiens SLC5A8 gene Proteins 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 241000220324 Pyrus Species 0.000 description 1
- 102100027215 Sodium-coupled monocarboxylate transporter 1 Human genes 0.000 description 1
- 101150095130 URAD gene Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- MYWUZJCMWCOHBA-VIFPVBQESA-N methamphetamine Chemical compound CN[C@@H](C)CC1=CC=CC=C1 MYWUZJCMWCOHBA-VIFPVBQESA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000021017 pears Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000001057 purple pigment Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
- B29K2105/0863—SMC, i.e. sheet moulding compound
Abstract
Description
【発明の詳細な説明】
Ｃ産業上の利用分野〕
本発明は成形型内で樹脂製品表面に塗膜を形成するイン
モールトコ−トガ法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an in-mold coating method for forming a coating film on the surface of a resin product within a mold.
自動屯の車体外板等を樹脂材料を用いで成形すルＬ’Ｊ
７丈として、ＳＭｃ（シート千−ル・５゛イン′グコ
ンバウンド）成形法が従来かＬら用いられているーこれ
は不飽和ポリエステル樹脂等に充填材、増粘剤、触媒等
を混今した樹脂ベーストにガラス繊維４公散、含浸させ
てシート状に成形（７たＳＭＣソートを成形％４ Ｈご
セントし、加熱加圧を行′！：い軟化させて上記成形型
内を流動させて成形型形状に成形する、）。共に、前記
触媒の作用に、より硬化させて一樹脂成形品を得るｂ法
である。L'J molds the outer panels of the car body using resin materials
For 7 lengths, the SMc (sheet 1,000-ru, 5-inch combined) molding method has traditionally been used from L - this is a resin made by mixing fillers, thickeners, catalysts, etc. with unsaturated polyester resin etc. Sprinkle glass fiber 4 on the base, impregnate it, and mold it into a sheet. ). Both methods are method b, in which a resin molded product is obtained by further curing due to the action of the catalyst.
通凭’ Ｓ Ｍ Ｃ成形により成形した樹脂製品表面に
は、型内でのＳＭＣシートの流動による空気の巻き込み
や７＋１−マーク等にまり表伽欠陥が発生することが多
く、後工程で焼き（１ｊ、、１″塗装を行な：う場合、
これらの欠陥部に含まれど）気泡ｉこより塗膜表面にピ
ンホールが生じる問題がある。On the surface of resin products molded by SMC molding, surface defects often occur due to air entrainment due to the flow of the SMC sheet within the mold, and surface defects such as 7+1- marks, etc. When performing 1j,,1″ painting,
There is a problem in that pinholes are formed on the surface of the coating film due to air bubbles (which are included in these defects).
この問題を解決するためｊ、ご樹脂製品部分峙に成形２
梨内に塗料を注入しで、型内で樹脂製品表面に塗膜を形
成するインモールドコート方法が行なわれているう
インモールドコート方法の例としては特開昭６王−２７
３９２１号公報に記載されたものがある。同公報に記載
の方法は、成形型内でＳＭＣシートを加熱、加圧し２、
ＳＭＣ−シート成形品表面が塗料に対し、て受容性とな
るまで硬化させ、その後成形型の加圧力より高い圧力で
塗料を成形型内に注入し７、塗料注入部側の成形品表面
に塗膜を形成することを特徴とし、でいる。To solve this problem, please mold the resin product part 2.
An example of the in-mold coating method is the in-mold coating method in which paint is injected into the inside of the mold and a coating film is formed on the surface of the resin product within the mold.
There is one described in Publication No. 3921. The method described in the publication involves heating and pressurizing the SMC sheet in a mold 2.
The surface of the SMC sheet molded product is cured until it becomes receptive to the paint, and then the paint is injected into the mold at a pressure higher than the pressure of the mold 7, and the paint is applied to the surface of the molded product on the side where the paint is injected. It is characterized by forming a film.
また、特開昭６２−■６０２１６号公報には、ＳＭＣシ
ートを成形する際に、型内に突出したビンで成形品に貫
通孔を設け、成形品の硬化完了後、型内に塗料を注入し
て一１上記を通孔を通過させることにより、塗料注入部
と反対側の成形品表面に塗膜を形成するこ、とを特徴と
している。In addition, JP-A No. 62-60216 discloses that when molding an SMC sheet, a through hole is formed in the molded product using a bottle protruding into the mold, and after the molded product is cured, paint is injected into the mold. (11) By passing through the through hole, a coating film is formed on the surface of the molded product on the side opposite to the paint injection part.
〔発明が解決しようとする課題］
上記従来技術のインモールドコート方法によれば、成形
時に型内で塗膜を形成できるため、後丁：程での塗装の
必要がなく、し、かも塗膜形成時のピンホールの問題を
解決でき、擾れた塗膜を得ることができる。[Problems to be Solved by the Invention] According to the above-mentioned conventional in-mold coating method, a coating film can be formed within the mold during molding, so there is no need for painting at the end of the molding process, and the coating film can be formed easily. It is possible to solve the problem of pinholes during formation, and it is possible to obtain a smudged coating film.
しかし、上記従来波１ホコでは、いずれも塗膜は成形品
の一面にしか形成できず、他の商は樹脂材料がそのまま
残される問題があった。従、って成形品の両側面を意匠
面とする必要がある製品σ）場合には従来同様後工程で
成形品の裏面に塗装を行なう必要があり、インモールド
コート方法０）採用による工数低減のメリットがないば
かりか、前述の塗装面ピンホールの発生する問題が牛じ
る結果になっていた。However, with the above-mentioned conventional wave 1-hole method, there was a problem in that the coating film could only be formed on one side of the molded product, and the resin material remained as it was on the other parts. Therefore, in the case of a product (σ) where both sides of the molded product need to be designed surfaces, it is necessary to paint the back side of the molded product in the post-process as in the conventional method, reducing the number of man-hours by adopting the in-mold coating method (0). Not only is there no benefit, but the aforementioned problem of pinholes on the painted surface is also a problem.
本発明は、上記課題に鑑み、上記の優れた特徴を活かし
ながら、成形品の両面に塗膜を形成することができるイ
ンモールドＶ−）方法を提供することを目的とし５てい
る９゜
［、課題を解決するための手段１
本発明は、従来のインモールトコ］−トガ法に見られる
ように成形品の硬化後にのみ塗料を注入するのではなく
、成形品の硬化前と硬化後の２回に分けて塗料を注入す
ることに′より、１つの成、形梨内で成形品の両面に塗
膜を形成するようにしまた＝とを特徴２．シている。In view of the above problems, it is an object of the present invention to provide an in-mold V-) method that can form a coating film on both sides of a molded product while taking advantage of the excellent features described above. , Means for Solving the Problems 1 The present invention does not inject paint only after the molded product has been cured, as seen in the conventional in-mold coating method, but rather injects the paint before and after the molded product has been cured. By injecting the paint in two parts, a coating film is formed on both sides of the molded product within one mold.2. It's on.
ずなオ）ら、本発明によれば、成形型τ樹、脹製品を成
形ず２）際に、成形型内ｊ′−塗料を注入し５、樹脂製
品表面に塗膜を形成する・インモ・−ルドコーｈ２去に
おいて、
樹脂製品成形の際、少くとも前記成形型の塗料注入部近
傍の樹脂製品部分が硬化づる前ｉ、Ｘ１ｆｉ′ｌｌ目の
塗料注入を行ない、注入Ｊモ力により未硬化の樹脂部分
を貫通させ、前記塗料注入部側反対側の検眼製品表面に
塗膜を形成し、次し）でパ樹脂製品を硬イヒさせた後２
回目の塗料注入を行ない前記塗料注入部側の樹脂製品表
面に塗膜を炉底することを特徴とする・インモールトコ
−トガ法が提供される。３ご作 用〕
成形型内に供給されたＳ Ｍ Ｃンート等の樹脂材料は
、成形ｉ′ノを閉じて所定の圧力と温度とべ加える、：
、とにより軟化、流動し２、成形型内の型空間を満たす
。樹脂材料はこの後触媒の作用により硬化を開始するが
、本発明の方法７は、樹脂が硬化する前のこの軟化状態
で第１回の塗料注入を行なう。According to the present invention, when the mold is not molded, the paint is injected into the mold, and a coating film is formed on the surface of the resin product.・-When molding a resin product, at least before the part of the resin product near the paint injection part of the mold is cured, the i, Penetrate the resin part and form a coating film on the surface of the optometry product on the opposite side to the paint injection part, and then harden the resin product in step 2.
An in-mold coating method is provided, which is characterized in that a second paint injection is performed and a coating film is deposited on the surface of the resin product on the side of the paint injection part. 3. Operation] The resin material, such as SMCT, supplied into the mold is heated to a predetermined pressure and temperature by closing the molding hole i':
, it softens and flows 2, filling the mold space in the mold. The resin material then begins to harden due to the action of the catalyst, but in method 7 of the present invention, the first paint injection is performed in this softened state before the resin hardens.
従来から知ふれている、Ｊ、うｊ、こ、軟化状態の樹脂
材木芽に高月二“て−注入されブニ２参本斗は技仁弓旨
を貝通し、桟１弓旨の塗料注入部側表面に拡がることな
く、塗料注入部と反対側の樹脂表面に到達し７、型と樹
脂表面との間を拡がって塗膜を形成する。As is known from the past, J, Uj, Ko, resin wood buds in a softened state are injected with Takatsuki 2'te-, Buni 2, Sanmoto is passed through the shell of Gijin Yuji, and paint is injected with Zan 1 Yuji. It reaches the resin surface on the opposite side from the paint injection part without spreading to the part side surface 7, and spreads between the mold and the resin surface to form a coating film.
次にこの状態て加圧と加熱とを統計ることにより、塗膜
と樹脂とは所定硬度：１−；７硬化される。Next, by applying pressure and heating in this state, the coating film and resin are cured to a predetermined hardness of 1-7.
硬化後、第２回目σ）塗料、′Ｉ々２人を行なうと、樹
脂向が硬化しでいるため、塗Ｃ）；ｉ樹脂を貫通ずるこ
となく ｙｔ桐注入部側の樹脂１ｉ ｆｆｌ’ｌ ｉ：
拡がり塗膜を形成−する。After curing, apply the second σ) paint, 'I, and 2 people. Since the resin side has not yet cured, apply C); i without penetrating the resin. i:
Forms a spreading coating film.
１］実施例〕
本発明の方法を実施するための装置を第１図に示す一０
図にお゛いて１は成形用金型の“コア側を、２はキャビ
ティ側をそれぞれ示に、キャビティ側金型２には塗料の
高圧インジェクタ３が設けられＣいる。インジェクタ：
３はシリンダ３ａとＩ’ｉッド３′！〕とから成り、ロ
ッド３ｂは図示しないアクチュエータに駆動され上下動
し、キャビデイ側金型２の塗料注入孔２ａを開閉するよ
うにされている。２またシリンダ３ａ内には高圧定量供
給ポンプ８により塗料９が加圧供給されている。1] Example] An apparatus for carrying out the method of the present invention is shown in FIG.
In the figure, 1 indicates the core side of the molding die, and 2 indicates the cavity side. The cavity side die 2 is equipped with a high-pressure paint injector 3. Injector:
3 is cylinder 3a and I'id 3'! ], and the rod 3b is driven by an actuator (not shown) to move up and down to open and close the paint injection hole 2a of the mold 2 on the cavity side. 2. Paint 9 is supplied under pressure into the cylinder 3a by a high-pressure metered supply pump 8.
本実施例では塗料９は例えばウレタン系０−・成。In this embodiment, the paint 9 is, for example, a urethane-based 0-.
分のものを使用し、１５０℃程度の金型温度で反応・硬
化するようｊ、：′調整されている。。また、金型に注
入する前に金型からの伝熱により塗料が硬化″するのを
防止するためシリンダ３ａには冷却水通路７が設けられ
、塗料は〜定温度に保持されでいる。It is adjusted to react and harden at a mold temperature of about 150°C. . Further, in order to prevent the paint from curing due to heat transfer from the mold before being poured into the mold, a cooling water passage 7 is provided in the cylinder 3a to maintain the paint at a constant temperature.
更に、金型２の前記塗料注入孔２ａ周囲１コは、この部
分の金型温度を上昇させるためのヒータが設けられてい
る。本実施例ではヒータは加熱油、蒸気等の熱媒を金型
２に設けた熱媒通路６に供給する形式としているが、電
気ヒータ、高周波加熱等の他の形式のものを用いでも良
い。Further, a heater is provided in one area around the paint injection hole 2a of the mold 2 to raise the temperature of the mold in this area. In this embodiment, the heater is of a type that supplies a heat medium such as heating oil or steam to a heat medium passage 6 provided in the mold 2, but other types such as an electric heater or high frequency heating may also be used.
次に本発明によるインモールドニコート方法を説明する
。第１図は成、形梨１，２内にＳＭＣシート５をセット
し、成形を開始した状態を小しでいる。Next, the in-mold coating method according to the present invention will be explained. FIG. 1 shows a state in which the SMC sheet 5 is set in the molded pears 1 and 2 and molding has started.
金’Ｓ’ＪＩ、２は予め１５０℃程度まで加熱されでお
り、ＳＭＣシー、ト５をセット後、図示しない油ｊ王装
置で２′Ｊ締めされ、ＳＭＣシート５：こ所定の汀）力
（最大１００ｋｇ／ａｍ程度）を加え７る。、第１図は
５ＭＣシート５が加熱により軟化し５、型形状：′、−
合わ＋ｉこ゛流動した状態、である。この状態では熱媒
通路６には熱媒は供給されておらず塗料注入孔２，１近
傍の金型２の温度はインジェクタ３ｏ）冷却水の影響で
他の金型部分の温度より低くなっている。ＳＭＣ”シー
・ト５は第１図の状態ご金ｑ ＱＪ）熱と触媒の作用と
により硬化を始めるが、塗料注入孔２ａ近傍では金型温
度が低いため他の部分、より硬化速度が遅い。Gold'S'JI, 2 was preheated to about 150°C, and after setting SMC sheet 5, it was tightened 2'J with an oil sealing device (not shown), and the SMC sheet 5 was heated to a specified force. (up to about 100 kg/am) and 7. , Figure 1 shows that the 5MC sheet 5 is softened by heating 5, and the mold shape is: ', -
The mixture is in a very fluid state. In this state, no heat medium is supplied to the heat medium passage 6, and the temperature of the mold 2 near the paint injection holes 2 and 1 is lower than the temperature of other mold parts due to the influence of the injector 3o) cooling water. There is. SMC" sheet 5 is in the state shown in Figure 1. QJ) It begins to harden due to heat and the action of the catalyst, but because the mold temperature is low near the paint injection hole 2a, the curing speed is slower in other parts. .
次にこの状態で第２閃に示すように第１ ［（ａｌ １
ｆｆｌの塗料注入が行なわれる。塗料１］の注入はイン
ジェクタ３のロッド３ｂを図示しないアクーヂ・−・エ
ータにより１．動さ七、注入孔２ａを開放する５″：、
とに４′リネコなわれる。塗料９は、ポンプ８により金
型圧力より充分に大きな圧力で供給され、注入孔２ａか
ら金や内に入る。塗料９の供給圧ノ、ノは、塗料が注入
孔２ａ近傍の未硬化ＳＭＣシートを！通し、ＳＭＣシー
ト５とコア側金型１との間に拡散するのに充分な大きさ
とされ、例ズば本実施例ではＳＭＣシート５の加圧圧力
の２倍程度とされ了−１，）る。注入孔２ａは、塗料の
ＳＭＣシート５への貫通を確実ｊごするため、できるだ
けＳＭＣシート５に垂直になるように設けられでいる。Next, in this state, as shown in the second flash, the first [(al 1
ffl paint injection is performed. The paint 1] is injected by moving the rod 3b of the injector 3 into the 1. Move 7, open the injection hole 2a 5'':,
Toni 4' Rineko Nagarareru. The paint 9 is supplied by the pump 8 at a pressure sufficiently higher than the mold pressure, and enters the mold through the injection hole 2a. The supply pressure of the paint 9 is such that the paint hits the uncured SMC sheet near the injection hole 2a! The pressure is set to be large enough to pass through and diffuse between the SMC sheet 5 and the core-side mold 1, and for example, in this embodiment, the pressure is about twice that of the SMC sheet 5. Ru. In order to ensure that the paint penetrates into the SMC sheet 5, the injection hole 2a is provided as perpendicular to the SMC sheet 5 as possible.
ポンプ８から所定の塗膜厚を得る０に充分な量の塗料が
供給されると第３図に示すようにインジェクタ３のロッ
ド３ｂが塗料注入口２ａを閉鎖し２、型内は塗料９によ
り成形開始時より高い圧力に維持され、ＳＭＣシート５
は一層圧縮される。次にこの状態で熱媒通路６に熱媒が
供給され、注入孔２ａ近傍の金型温度が上昇する。これ
に、より、未硬化であった注入孔２ａ近傍のＳＭＣシー
ト５の硬化が進行する。また、注入された塗料９は金型
１との接触により加熱され硬化し、ＳＭＣシート５と金
型］との間に強固な塗膜１０を形成する。注入孔２ａ近
傍のＳ Ｍ Ｃシート５が充分な強度まで硬化すると次
に第４図に示すように第２回［：］１の塗料注入が行な
われる。この注入の際にはＳＭＣ／−ト５は硬化し１で
いるため、今回は塗料はＳＭＣシート・５を貫通−りす
、キャビティ側金型２とＳＭＣ／−ト５との間に４透す
る。所定早の紫料を注入後２主人孔２ａは閉鎖され、注
入された塗料は金型２との接触により硬化して強固な塗
膜ＩＩが形成される。ＳＭＣシート５と塗膜１１とが硬
化完了後金”；ｌ １ ’ ２を開放する二とにより、
両面：こ塗膜力く形成されたＳ ＭＣシート戊成形品取
り出すことができる。When a sufficient amount of paint is supplied from the pump 8 to obtain a predetermined coating thickness, the rod 3b of the injector 3 closes the paint injection port 2a as shown in FIG. 3, and the inside of the mold is filled with paint 9. Maintained at a higher pressure than at the start of molding, SMC sheet 5
is further compressed. Next, in this state, a heat medium is supplied to the heat medium passage 6, and the mold temperature near the injection hole 2a increases. As a result, the uncured SMC sheet 5 near the injection hole 2a progresses in hardening. Furthermore, the injected paint 9 is heated and hardened by contact with the mold 1, forming a strong coating film 10 between the SMC sheet 5 and the mold. When the SMC sheet 5 in the vicinity of the injection hole 2a is cured to a sufficient strength, the second injection of paint [:]1 is performed as shown in FIG. During this injection, the SMC sheet 5 hardens and remains as 1, so this time the paint penetrates through the SMC sheet 5 and is injected between the mold 2 on the cavity side and the SMC sheet 5. . After injecting the purple pigment at a predetermined time, the two main holes 2a are closed, and the injected paint is hardened by contact with the mold 2, forming a strong coating film II. After the SMC sheet 5 and the coating film 11 are completely cured, the gold is released.
Both sides: The formed SMC sheet can be taken out from the molded product.
上記の操作＋ｉ’１２綿め圧力を加えたまま行なうため
、塗料注入の際、型を開くこと：こよる樹脂成形品端部
このシール効果の低下が生（：ず、成形のサイクルタイ
ムにも影響を噂え？＞’Ｊ、）。Since the above operation + i'12 is performed while applying pressure, opening the mold when injecting the paint will reduce the sealing effect at the edges of the resin molded product. Rumors of influence?>'J,).
「発明の効果コ
本発明のイン玉・〜ルビｍ１−）方法：：よれぼ、型内
の樹脂材料の硬化前と硬化後との２回に分けて型内に塗
料を注入することにより樹脂成形品の両面に塗膜を形成
することができるため、成形品の両面を意に面として使
用するような製品についてもｉつの型内で塗膜形成が行
なえ、後工程での塗装を行なう必要がない。従−２て工
数を大幅に削減し、かつ塗膜の品質を向上させることが
可能となる。``Effects of the Invention - Method of the Invention of the Invention: Rubi m1-) Method:: By injecting the paint into the mold twice, before curing the resin material in the mold and after curing the resin material, Since a coating can be formed on both sides of a molded product, coating can be formed in one mold even for products where both sides of the molded product are used as surfaces, eliminating the need for painting in a post-process. Therefore, it is possible to significantly reduce the number of man-hours and improve the quality of the coating film.
第１図から第４図は本発明によるインモールドコート方
法の一実施例の各段階を示す略本図であり、第１図ｊ；
ｉｓＭ’ｃシートを金型にセットした状態を示ｒ図、第
２図は第１回の塗利注人工程を示１図、第３図は第１回
ｏｒ）塗料注入後の硬化工程を示す図、第４図は第２回
の塗料注入丁程を示す図である。
１・・・金型（−］コア側、
２・・・金型（キャビブイ側）、
２ａ・・・塗料注入孔、 ３・・・インジェクタ、
３ａ・・・シリンダ、 ３ｂ・・・Ｕラド、５・
・・樹脂桐材、 ６・・・熱媒通路、７・・・冷
却水通路、 ８・・・ポンプ、９・・・塗料、
１０．１１・・・塗膜。
第
１・、金型（コア側）
２ 金力Ｉノ （・キ −ヤ ヒ゛デ 、イ イｊ
ｌｌ＋ ）２ａ・・質料ｌ１人孔
ろ・インジェクタ
５ｈ・・・ロッド
１ 図
５・・制用ｊ′
６−熱媒通路
７ 冷却水通路
８ ポンプ
９ 塗料
２図
「１ノド
イ☆Ｉｌｉ’ｐｌｉ
トン′ ソ
冷オ；ｉ
第３図
り、メト
樹脂
熱媒通路（力１１熱、中）
質料
塗模1 to 4 are schematic diagrams showing each step of an embodiment of the in-mold coating method according to the present invention, and FIG. 1j;
Figure 2 shows the state in which the isM'c sheet is set in the mold, Figure 2 shows the first uri-pouring process, Figure 3 shows the curing process after the first or) paint injection. The figure shown in FIG. 4 is a diagram showing the second paint injection process. 1... Mold (-) core side, 2... Mold (cabi buoy side), 2a... Paint injection hole, 3... Injector,
3a...Cylinder, 3b...Urad, 5.
...Resin paulownia material, 6...Heating medium passage, 7...Cooling water passage, 8...Pump, 9...Paint,
10.11... Paint film. 1st, Mold (core side) 2
ll+ ) 2a...Material l1 Personnel filter/Injector 5h...Rod 1 Figure 5...Use j' 6-Heat medium passage 7 Cooling water passage 8 Pump 9 Paint 2 Figure 1 Nodoi☆Ili'pli ton' 3rd drawing, meth resin heat transfer path (power 11 heat, medium) Material painting
Claims (1)
を注入し、樹脂製品表面に塗膜を形成するインモールド
コート法において、 樹脂製品成形の際、少くとも前記成形型の塗料注入部近
傍の樹脂製品部分が硬化する前に１回目の塗料注入を行
ない、注入圧力により未硬化の樹脂部分を貫通させ、前
記塗料注入部の反対側の樹脂製品表面に塗膜を形成し、
次いで樹脂製品を硬化させた後２回目の塗料注入を行な
い前記塗料注入部側の樹脂製品表面に塗膜を形成するこ
とを特徴とするインモールドコート方法。[Claims] 1. In the in-mold coating method, in which paint is injected into the mold and a coating film is formed on the surface of the resin product when molding the resin product, In both cases, the first paint is injected before the resin product part near the paint injection part of the mold is cured, and the injection pressure penetrates the uncured resin part, and the resin product surface on the opposite side of the paint injection part is injected. Forms a coating film,
An in-mold coating method characterized in that, after the resin product is cured, a second paint injection is performed to form a coating film on the surface of the resin product on the side of the paint injection part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6981190A JPH03272816A (en) | 1990-03-22 | 1990-03-22 | Process of in-mold coat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6981190A JPH03272816A (en) | 1990-03-22 | 1990-03-22 | Process of in-mold coat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03272816A true JPH03272816A (en) | 1991-12-04 |
Family
ID=13413519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6981190A Pending JPH03272816A (en) | 1990-03-22 | 1990-03-22 | Process of in-mold coat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03272816A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994000284A1 (en) * | 1992-06-30 | 1994-01-06 | Matsushita Electric Works, Ltd. | Resin mold-covering method for molded resin products, resin mold-covering apparatus employed in the same method, material used for the same cover-molding, and molded product formed by the same method |
-
1990
- 1990-03-22 JP JP6981190A patent/JPH03272816A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5676901A (en) * | 1992-06-19 | 1997-10-14 | Matsushita Electric Works, Ltd. | Process for resin-coating of resin moldings, resin-coating apparatus for use in the process |
| WO1994000284A1 (en) * | 1992-06-30 | 1994-01-06 | Matsushita Electric Works, Ltd. | Resin mold-covering method for molded resin products, resin mold-covering apparatus employed in the same method, material used for the same cover-molding, and molded product formed by the same method |
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