JP2010228355A - In-mold coating method - Google Patents

In-mold coating method Download PDF

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JP2010228355A
JP2010228355A JP2009079921A JP2009079921A JP2010228355A JP 2010228355 A JP2010228355 A JP 2010228355A JP 2009079921 A JP2009079921 A JP 2009079921A JP 2009079921 A JP2009079921 A JP 2009079921A JP 2010228355 A JP2010228355 A JP 2010228355A
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mold
coating material
injecting
pressure
injection
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JP5383277B2 (en
Inventor
Susumu Horinaka
進 堀中
Seito Noguchi
聖人 野口
Tomohiko Shigihara
智彦 鴫原
Hidekazu Kabaya
英和 蒲谷
Yasuki Okanemasa
泰樹 大兼政
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2009079921A priority Critical patent/JP5383277B2/en
Priority to US12/720,388 priority patent/US20100237536A1/en
Priority to CN2010101452525A priority patent/CN101890785A/en
Publication of JP2010228355A publication Critical patent/JP2010228355A/en
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Publication of JP5383277B2 publication Critical patent/JP5383277B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-mold coating method enhancing adhesiveness between a coating material and a resin molded product without using a special facility or die. <P>SOLUTION: The in-mold coating method for injecting a coating material 4 into dies 1, 2 to coat the surface 6a of the resin molded product 6 includes a quantitative injection process for injecting a predetermined quantity of coating material 4 into a cavity 7, and a dwelling injection process for injecting the coating material 4 into the cavity 7 so that the pressure in the cavity 7 obtained in the quantitative injection process is maintained to a predetermined value P<SB>L</SB>or higher. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、樹脂成形と平行して金型内に被覆材を注入し、樹脂成形品の表面を被覆材でコーティングする型内被覆方法に関する。   The present invention relates to an in-mold coating method in which a coating material is injected into a mold in parallel with resin molding and the surface of a resin molded product is coated with the coating material.

従来の型内被覆方法としては、樹脂成形品の表面に被覆材を被覆するために、樹脂成形品の表面が被覆材に対し、その注入・流動圧力に耐え得る適正硬化または固化の時点で、成形型をそのままの状態に保持しながら、成形型内表面と樹脂成形品との境界に、所要の注入速度パターンで多段の可変速度により被覆材を注入して樹脂成形品の表面を被覆する工程と、被覆材を硬化させる工程とを有する型内被覆方法が知られている（例えば、特許文献１参照）。 As a conventional in-mold coating method, in order to coat the surface of the resin molded product with a coating material, the surface of the resin molded product is properly cured or solidified to withstand the injection / flow pressure against the coating material. A process of covering the surface of a resin molded product by injecting a coating material at a variable injection speed with a required injection speed pattern at the boundary between the inner surface of the mold and the resin molded product while holding the mold as it is. An in-mold coating method including a step of curing the coating material is known (for example, see Patent Document 1).

特開平６−３２８５０４号公報JP-A-6-328504

しかし、特許文献１に記載の技術においては、樹脂成形品の硬化が被覆材注入の条件になっているため、樹脂の硬化時間を必要とし、樹脂の硬化後に被覆材を注入するためサイクルタイムが長くなってしまうという問題がある。また、被覆材を定量供給するため、樹脂の収縮にバラツキが発生した場合には対応することができない点や十分な密着性を得ることができない点などから成形不良が発生する虞があるという問題がある。 However, in the technique described in Patent Document 1, since the curing of the resin molded product is a condition for injecting the coating material, the curing time of the resin is required, and the cycle time is long because the coating material is injected after the resin is cured. There is a problem of becoming longer. In addition, since the coating material is supplied in a fixed quantity, there is a possibility that defective molding may occur due to inability to cope with variations in resin shrinkage or inadequate adhesion. There is.

本発明は、従来の技術が有するこのような問題点に鑑みてなされたものであり、その目的とするところは、特殊な設備、金型を用いなくても被覆材と樹脂成形品の密着性を高めることができる型内被覆方法を提供しようとするものである。   The present invention has been made in view of such problems of the prior art, and the object of the present invention is to provide adhesion between a coating material and a resin molded product without using special equipment or a mold. It is an object of the present invention to provide an in-mold coating method capable of increasing the resistance.

上記課題を解決すべく請求項１に係る発明は、金型内に被覆材を注入し、樹脂成形品の表面を被覆する型内被覆方法であって、被覆材を金型内に注入する注入工程と、この注入工程において得られた金型内の圧力が所定値以上に維持されるよう被覆材を金型内に注入する保圧注入工程を備えたものである。 In order to solve the above-mentioned problem, the invention according to claim 1 is an in-mold coating method for injecting a coating material into a mold and coating the surface of a resin molded product, and injecting the coating material into the mold And a pressure holding injection step of injecting the coating material into the mold so that the pressure in the mold obtained in this injection step is maintained at a predetermined value or more.

請求項１記載の型内被覆方法において、前記注入工程は所定量の被覆材を金型内に注入する定量注入工程としてもよいし、または金型内の圧力が設定圧になるまで被覆材を金型内に注入する定圧注入工程としてもよい。 2. The in-mold coating method according to claim 1, wherein the injecting step may be a fixed amount injecting step of injecting a predetermined amount of the covering material into the mold, or the covering material is added until the pressure in the mold becomes a set pressure. It may be a constant pressure injection process for injecting into the mold.

請求項４に係る発明は、金型内に被覆材を注入し、樹脂成形品の表面を被覆する型内被覆方法であって、被覆材を金型内に注入する注入工程と、この注入工程において得られた被覆材供給装置の注入圧力が所定値以上に維持されるよう被覆材を金型内に注入する保圧注入工程を備えたものである。 The invention according to claim 4 is an in-mold coating method for injecting a coating material into a mold and coating the surface of a resin molded product, an injection process for injecting the coating material into the mold, and this injection process Is provided with a pressure-holding injection step of injecting the coating material into the mold so that the injection pressure of the coating material supply device obtained in the above is maintained at a predetermined value or more.

請求項４記載の型内被覆方法において、前記注入工程は所定量の被覆材を金型内に注入する定量注入工程としてもよいし、または被覆材供給装置の注入圧力が設定圧になるまで被覆材を金型内に注入する定圧注入工程としてもよい。 5. The in-mold coating method according to claim 4, wherein the injecting step may be a fixed amount injecting step of injecting a predetermined amount of the covering material into the mold, or until the injecting pressure of the covering material supply device reaches a set pressure. It may be a constant pressure injection process in which the material is injected into the mold.

本発明によれば、特殊な設備、金型を用いなくても被覆材と樹脂成形品の密着性を高めることができる。また、樹脂の収縮と被覆材自体の収縮に対応することができ、ヒケなどの不具合がなくなり品質が大幅に向上する。 According to the present invention, the adhesion between the coating material and the resin molded product can be improved without using special equipment or a mold. Further, it is possible to cope with the shrinkage of the resin and the shrinkage of the coating material itself, and there is no problem such as sink marks, and the quality is greatly improved.

本発明に係る型内被覆方法を実施する装置の構成図Configuration diagram of apparatus for carrying out in-mold coating method according to the present invention 被覆材供給装置の構成図Configuration diagram of the coating material supply device 溶融樹脂射出工程の説明図Explanatory drawing of molten resin injection process 第１実施の形態の説明図で、（ａ）は定量注入工程、（ｂ）は保圧注入工程、（ｃ）は金型内の圧力波形It is explanatory drawing of 1st Embodiment, (a) is a fixed-quantity injection | pouring process, (b) is a holding pressure injection | pouring process, (c) is a pressure waveform in a metal mold | die. 樹脂成形品の表面に被覆材がコーティングされた状態の説明図Explanatory drawing of the state where the surface of the resin molded product is coated with a coating material 第２実施の形態の説明図で、（ａ）は定圧注入工程、（ｂ）は保圧注入工程、（ｃ）は金型内の圧力波形It is explanatory drawing of 2nd Embodiment, (a) is a constant pressure injection | pouring process, (b) is a holding pressure injection | pouring process, (c) is a pressure waveform in a metal mold | die. 第３実施の形態の説明図で、（ａ）は定量注入工程、（ｂ）は保圧注入工程、（ｃ）は被覆材供給装置側の圧力波形It is explanatory drawing of 3rd Embodiment, (a) is a fixed-quantity injection | pouring process, (b) is a holding pressure injection | pouring process, (c) is a pressure waveform by the side of a coating material supply apparatus. 第４実施の形態の説明図で、（ａ）は定圧注入工程、（ｂ）は保圧注入工程、（ｃ）は被覆材供給装置側の圧力波形It is explanatory drawing of 4th Embodiment, (a) is a constant pressure injection | pouring process, (b) is a holding pressure injection | pouring process, (c) is a pressure waveform by the side of a coating material supply apparatus.

以下に本発明の実施の形態を添付図面に基づいて説明する。本発明に係る型内被覆方法を実施する装置は、図１に示すように、固定金型１、可動金型２、スプルー３、被覆材４を金型１，２内に注入する被覆材供給装置５などを備えてなる。固定金型１と可動金型２により、樹脂成形品６を成形するためのキャビティ７が形成される。また、固定金型１にはキャビティ７内の圧力を検出する圧力センサ８が設置されている。９はスプルー３に溶融樹脂１０を供給する射出成形機のノズルである。 Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the apparatus for carrying out the in-mold coating method according to the present invention supplies a coating material for injecting a fixed mold 1, a movable mold 2, a sprue 3 and a coating material 4 into the molds 1 and 2. The apparatus 5 is provided. A cavity 7 for molding the resin molded product 6 is formed by the fixed mold 1 and the movable mold 2. The fixed mold 1 is provided with a pressure sensor 8 for detecting the pressure in the cavity 7. Reference numeral 9 denotes a nozzle of an injection molding machine that supplies the molten resin 10 to the sprue 3.

被覆材供給装置５は、図２に示すように、被覆材タンク１１、ポンプ１２、注入ガン１３、コントローラ１４などを備えて構成されている。被覆材供給装置５は、被覆材タンク１１に貯留してある被覆材４を所望の圧力で所望の量だけキャビティ７に供給することができる。また、被覆材供給装置５は、圧力センサ８の検出信号をフィードバックして、キャビティ７内の圧力が所望値になるまで、または所望の範囲内になるよう被覆材４をキャビティ７に供給することもできる。 As shown in FIG. 2, the coating material supply device 5 includes a coating material tank 11, a pump 12, an injection gun 13, a controller 14, and the like. The coating material supply device 5 can supply the coating material 4 stored in the coating material tank 11 to the cavity 7 in a desired amount at a desired pressure. Further, the coating material supply device 5 feeds back the detection signal of the pressure sensor 8 and supplies the coating material 4 to the cavity 7 until the pressure in the cavity 7 reaches a desired value or within a desired range. You can also.

以上のように構成される装置が実施する本発明に係る型内被覆方法の第１実施の形態は、図３に示すように、固定金型１と可動金型２によりキャビティ７を形成し、このキャビティ７に射出成形機のノズル９から供給される溶融樹脂１０を、スプルー３を介して射出し、樹脂成形品６を成形する（溶融樹脂射出工程）。 In the first embodiment of the in-mold coating method according to the present invention performed by the apparatus configured as described above, a cavity 7 is formed by a fixed mold 1 and a movable mold 2 as shown in FIG. The molten resin 10 supplied from the nozzle 9 of the injection molding machine is injected into the cavity 7 through the sprue 3 to mold the resin molded product 6 (molten resin injection process).

次いで、溶融樹脂射出工程で樹脂成形品６にスキン層が形成された段階で、図４（ａ）に示すように、樹脂成形品６と固定金型１により形成される隙間１６に、被覆材供給装置５がポンプ１２を駆動して注入ガン１３から所定量の被覆材４を注入する（定量注入工程）。 Next, at the stage where the skin layer is formed on the resin molded product 6 in the molten resin injection process, as shown in FIG. 4A, a coating material is formed in the gap 16 formed by the resin molded product 6 and the fixed mold 1. The supply device 5 drives the pump 12 to inject a predetermined amount of the covering material 4 from the injection gun 13 (quantitative injection process).

次いで、図４（ｂ）に示すように、被覆材供給装置５が定量注入工程におけるキャビティ７内の最大圧力ＰＨと目標値とを設定すると共に、キャビティ７内の圧力が所定値ＰＬ以上に維持されるようポンプ１２を駆動して注入ガン１３から被覆材４をキャビティ７に注入する（保圧注入工程）。 Then, as shown in FIG. 4 (b), together with the coating material supply device 5 sets a maximum pressure P H and the target value in the cavity 7 in quantitative injection process, the pressure in the cavity 7 is greater than or equal to a predetermined value P L Then, the pump 12 is driven so as to be maintained at a constant pressure, and the covering material 4 is injected from the injection gun 13 into the cavity 7 (holding pressure injection process).

キャビティ７内の圧力は、図４（ｃ）に示すように、定量注入工程及び保圧注入工程において被覆材供給装置５により制御される。保圧注入工程では、キャビティ７内の圧力が、目標値になるように制御される（矢印Ａ）か、または目標値と所定値ＰＬの間になるように制御される（矢印Ｂ）。なお、所定値ＰＬは、０．０５ＭＰａ≦ＰＬを満たすのが好ましい。すると、図５に示すように、樹脂成形品６の表面（意匠面）６ａに被覆材４がコーティングされる。 As shown in FIG. 4C, the pressure in the cavity 7 is controlled by the coating material supply device 5 in the quantitative injection process and the holding pressure injection process. The coercive insufflation step, the pressure in the cavity 7 is controlled to become the target value (arrow A), or is controlled to be between the target value and a predetermined value P L (arrow B). The predetermined value P L preferably satisfies 0.05 MPa ≦ P L. Then, as shown in FIG. 5, the coating material 4 is coated on the surface (design surface) 6 a of the resin molded product 6.

また、本発明に係る型内被覆方法の第２実施の形態は、図３に示す第１実施の形態と同様に、固定金型１と可動金型２によりキャビティ７を形成し、このキャビティ７に射出成形機のノズル９から供給される溶融樹脂１０を、スプルー３を介して射出し、樹脂成形品６を成形する（溶融樹脂射出工程）。   Further, in the second embodiment of the in-mold coating method according to the present invention, the cavity 7 is formed by the fixed mold 1 and the movable mold 2 as in the first embodiment shown in FIG. The molten resin 10 supplied from the nozzle 9 of the injection molding machine is injected through the sprue 3 to mold the resin molded product 6 (molten resin injection process).

次いで、溶融樹脂射出工程で樹脂成形品６にスキン層が形成された段階で、図６（ａ）に示すように、樹脂成形品６と固定金型１により形成される隙間１６に、被覆材供給装置５がポンプ１２を駆動して注入ガン１３からキャビティ７内の圧力が設定圧になるまで被覆材４をキャビティ７に注入する（定圧注入工程）。 Next, at the stage where the skin layer is formed on the resin molded product 6 in the molten resin injection process, as shown in FIG. 6A, a coating material is formed in the gap 16 formed by the resin molded product 6 and the fixed mold 1. The supply device 5 drives the pump 12 to inject the coating material 4 into the cavity 7 from the injection gun 13 until the pressure in the cavity 7 reaches a set pressure (constant pressure injection process).

次いで、図６（ｂ）に示すように、被覆材供給装置５が定圧注入工程における設定圧ＰＨと目標値とを設定すると共に、キャビティ７内の圧力が所定値ＰＬ以上に維持されるようポンプ１２を駆動して注入ガン１３から被覆材４をキャビティ７に注入する（保圧注入工程）。 Then, as shown in FIG. 6 (b), with the coating material supply device 5 sets the set pressure P H and the target value in the constant pressure injection process, the pressure in the cavity 7 is maintained above a predetermined value P L The pump 12 is driven to inject the covering material 4 from the injection gun 13 into the cavity 7 (pressure keeping injection process).

キャビティ７内の圧力は、図６（ｃ）に示すように、定圧注入工程及び保圧注入工程において被覆材供給装置５により制御される。保圧注入工程では、キャビティ７内の圧力が、目標値になるように制御される（矢印Ａ）か、または目標値と所定値ＰＬの間になるように制御される（矢印Ｂ）。なお、所定値ＰＬは、０．０５ＭＰａ≦ＰＬを満たすのが好ましい。すると、図５に示すように、樹脂成形品６の表面（意匠面）６ａに被覆材４がコーティングされる。 The pressure in the cavity 7 is controlled by the coating material supply device 5 in the constant pressure injection process and the holding pressure injection process, as shown in FIG. The coercive insufflation step, the pressure in the cavity 7 is controlled to become the target value (arrow A), or is controlled to be between the target value and a predetermined value P L (arrow B). The predetermined value P L preferably satisfies 0.05 MPa ≦ P L. Then, as shown in FIG. 5, the coating material 4 is coated on the surface (design surface) 6 a of the resin molded product 6.

また、図１及び図２に示す上述の第１及び第２実施の形態では、キャビティ７内の圧力を検出して被覆材供給装置５のコントローラ１４にフィードバックしているが、被覆材供給装置５側の圧力、例えば注入ガン１３の入力側の被覆材４の圧力を検出してコントローラ１４にフィードバックすることもできる。 In the first and second embodiments shown in FIGS. 1 and 2, the pressure in the cavity 7 is detected and fed back to the controller 14 of the coating material supply device 5. The pressure on the side, for example, the pressure on the coating material 4 on the input side of the injection gun 13 can be detected and fed back to the controller 14.

本発明に係る型内被覆方法の第３実施の形態は、図３に示す第１実施の形態と同様に、固定金型１と可動金型２によりキャビティ７を形成し、このキャビティ７に射出成形機のノズル９から供給される溶融樹脂１０を、スプルー３を介して射出し、樹脂成形品６を成形する（溶融樹脂射出工程）。   In the third embodiment of the in-mold coating method according to the present invention, a cavity 7 is formed by a fixed mold 1 and a movable mold 2 as in the first embodiment shown in FIG. The molten resin 10 supplied from the nozzle 9 of the molding machine is injected through the sprue 3 to form the resin molded product 6 (molten resin injection process).

次いで、溶融樹脂射出工程で樹脂成形品６にスキン層が形成された段階で、図７（ａ）に示すように、樹脂成形品６と固定金型１により形成される隙間１６に、被覆材供給装置５がポンプ１２を駆動して注入ガン１３から所定量の被覆材４を注入する（定量注入工程）。 Next, at the stage where the skin layer is formed on the resin molded product 6 in the molten resin injection process, as shown in FIG. 7A, a coating material is formed in the gap 16 formed by the resin molded product 6 and the fixed mold 1. The supply device 5 drives the pump 12 to inject a predetermined amount of the covering material 4 from the injection gun 13 (quantitative injection process).

次いで、図７（ｂ）に示すように、被覆材供給装置５が定量注入工程における注入ガン１３の入力側の最大圧力ＰＨと目標値とを設定すると共に、注入ガン１３の入力側の圧力が所定値ＰＬ以上に維持されるようポンプ１２を駆動して注入ガン１３から被覆材４をキャビティ７に注入する（保圧注入工程）。 Then, as shown in FIG. 7 (b), together with the coating material supply device 5 sets a maximum pressure P H and the target value of the input side of the injection gun 13 in the metering injection step, the input side pressure of the injection gun 13 The pump 12 is driven to inject the coating material 4 from the injection gun 13 into the cavity 7 so that is maintained at a predetermined value P L or more (pressure holding injection process).

注入ガン１３の入力側の圧力は、図７（ｃ）に示すように、定量注入工程及び保圧注入工程において被覆材供給装置５により制御される。保圧注入工程では、注入ガン１３の入力側の圧力が、目標値になるように制御される（矢印Ａ）か、または目標値と所定値ＰＬの間になるように制御される（矢印Ｂ）。なお、所定値ＰＬは、０．０５ＭＰａ≦ＰＬを満たすのが好ましい。すると、図５に示すように、樹脂成形品６の表面（意匠面）６ａに被覆材４がコーティングされる。 As shown in FIG. 7C, the pressure on the input side of the injection gun 13 is controlled by the coating material supply device 5 in the quantitative injection process and the holding pressure injection process. The coercive insufflation step, the input side pressure of the injection gun 13 is controlled to become the target value (arrow A), or is controlled to be between the target value and a predetermined value P L (arrow B). The predetermined value P L preferably satisfies 0.05 MPa ≦ P L. Then, as shown in FIG. 5, the coating material 4 is coated on the surface (design surface) 6 a of the resin molded product 6.

また、本発明に係る型内被覆方法の第４実施の形態は、図３に示す第１実施の形態と同様に、固定金型１と可動金型２によりキャビティ７を形成し、このキャビティ７に射出成形機のノズル９から供給される溶融樹脂１０を、スプルー３を介して射出し、樹脂成形品６を成形する（溶融樹脂射出工程）。   Further, in the fourth embodiment of the in-mold coating method according to the present invention, the cavity 7 is formed by the fixed mold 1 and the movable mold 2 as in the first embodiment shown in FIG. The molten resin 10 supplied from the nozzle 9 of the injection molding machine is injected through the sprue 3 to mold the resin molded product 6 (molten resin injection process).

次いで、溶融樹脂射出工程で樹脂成形品６にスキン層が形成された段階で、図８（ａ）に示すように、樹脂成形品６と固定金型１により形成される隙間１６に、被覆材供給装置５がポンプ１２を駆動して注入ガン１３から注入ガン１３の入力側の圧力が設定圧になるまで被覆材４をキャビティ７に注入する（定圧注入工程）。 Next, at the stage where the skin layer is formed on the resin molded product 6 in the molten resin injection process, as shown in FIG. 8A, a coating material is formed in the gap 16 formed by the resin molded product 6 and the fixed mold 1. The supply device 5 drives the pump 12 to inject the coating material 4 into the cavity 7 from the injection gun 13 until the pressure on the input side of the injection gun 13 reaches a set pressure (constant pressure injection process).

次いで、図８（ｂ）に示すように、被覆材供給装置５が定圧注入工程の設定圧ＰＨと目標値とを設定すると共に、注入ガン１３の入力側の圧力が所定値ＰＬ以上に維持されるようポンプ１２を駆動して注入ガン１３から被覆材４をキャビティ７に注入する（保圧注入工程）。 Then, as shown in FIG. 8 (b), with the coating material supply device 5 sets the set pressure P H and the target value of the constant pressure injection process, the input-side pressure of the injection gun 13 is equal to or greater than the predetermined value P L The pump 12 is driven so as to be maintained, and the covering material 4 is injected from the injection gun 13 into the cavity 7 (holding pressure injection process).

注入ガン１３の入力側の圧力は、図８（ｃ）に示すように、定圧注入工程及び保圧注入工程において被覆材供給装置５により制御される。保圧注入工程では、注入ガン１３の入力側の圧力が、目標値になるように制御される（矢印Ａ）は、または目標値と所定値ＰＬの間になるように制御される（矢印Ｂ）。なお、所定値ＰＬは、０．０５ＭＰａ≦ＰＬを満たすのが好ましい。すると、図５に示すように、樹脂成形品６の表面（意匠面）６ａに被覆材４がコーティングされる。 As shown in FIG. 8C, the pressure on the input side of the injection gun 13 is controlled by the coating material supply device 5 in the constant pressure injection process and the holding pressure injection process. The coercive insufflation step, the input side pressure of the injection gun 13 is controlled to become the target value (arrow A) is or are controlled to be between the target value and a predetermined value P L (arrow B). The predetermined value P L preferably satisfies 0.05 MPa ≦ P L. Then, as shown in FIG. 5, the coating material 4 is coated on the surface (design surface) 6 a of the resin molded product 6.

ここで、被覆材４を注入する際の圧力検出の対象としては、上述のように金型内（キャビティ７内）または被覆材供給装置５側のどちらでもよいが、望ましいのは金型内（キャビティ７内）の方である。 Here, the pressure detection target when the coating material 4 is injected may be either in the mold (in the cavity 7) or on the coating material supply device 5 side as described above, but is preferably in the mold ( It is in the cavity 7).

本発明によれば、特殊な設備、金型を用いなくても被覆材と樹脂成形品の密着性を高めることができ、且つヒケなどの不具合がなくなり品質が大幅に向上する型内被覆方法が提供され、利用拡大が期待される。 According to the present invention, there is provided an in-mold coating method that can improve the adhesion between a coating material and a resin molded product without using special equipment and a mold, and eliminates defects such as sink marks and greatly improves quality. Provided and expected to expand usage.

１…固定金型、２…可動金型、３…スプルー、４…被覆材、５…被覆材供給装置、６…樹脂成形品、７…キャビティ、８…圧力センサ、９…ノズル、１０…溶融樹脂、１１…被覆材タンク、１２…ポンプ、１３…注入ガン、１４…コントローラ、１６…隙間。 DESCRIPTION OF SYMBOLS 1 ... Fixed metal mold, 2 ... Movable metal mold, 3 ... Sprue, 4 ... Coating material, 5 ... Coating material supply apparatus, 6 ... Resin molded product, 7 ... Cavity, 8 ... Pressure sensor, 9 ... Nozzle, 10 ... Melting Resin, 11 ... coating material tank, 12 ... pump, 13 ... injection gun, 14 ... controller, 16 ... gap.

Claims (6)

金型内に被覆材を注入し、樹脂成形品の表面を被覆する型内被覆方法であって、被覆材を金型内に注入する注入工程と、この注入工程において得られた金型内の圧力が所定値以上に維持されるよう被覆材を金型内に注入する保圧注入工程を備えたことを特徴とする型内被覆方法。 An in-mold coating method for injecting a coating material into a mold and coating the surface of a resin molded product, an injection process for injecting the coating material into the mold, and an in-mold obtained in this injection process An in-mold coating method comprising a pressure-holding injection step of injecting a coating material into a mold so that the pressure is maintained at a predetermined value or more. 請求項１記載の型内被覆方法において、前記注入工程が所定量の被覆材を金型内に注入する定量注入工程であることを特徴とする型内被覆方法。 2. The in-mold coating method according to claim 1, wherein the injecting step is a quantitative injecting step of injecting a predetermined amount of a covering material into the mold. 請求項１記載の型内被覆方法において、前記注入工程が金型内の圧力が設定圧になるまで被覆材を金型内に注入する定圧注入工程であることを特徴とする型内被覆方法。 2. The in-mold coating method according to claim 1, wherein the injecting step is a constant pressure injecting step of injecting the coating material into the mold until the pressure in the mold reaches a set pressure. 金型内に被覆材を注入し、樹脂成形品の表面を被覆する型内被覆方法であって、被覆材を金型内に注入する注入工程と、この注入工程において得られた被覆材供給装置の注入圧力が所定値以上に維持されるよう被覆材を金型内に注入する保圧注入工程を備えたことを特徴とする型内被覆方法。 An in-mold coating method for injecting a coating material into a mold and covering the surface of a resin molded product, an injection process for injecting the coating material into the mold, and a coating material supply device obtained in this injection process An in-mold coating method comprising a pressure-holding injecting step of injecting a coating material into the mold so that the injection pressure is maintained at a predetermined value or more. 請求項４記載の型内被覆方法において、前記注入工程が所定量の被覆材を金型内に注入する定量注入工程であることを特徴とする型内被覆方法。 5. The in-mold coating method according to claim 4, wherein the injection step is a quantitative injection step of injecting a predetermined amount of the coating material into the mold. 請求項４記載の型内被覆方法において、前記注入工程が被覆材供給装置の注入圧力が設定圧になるまで被覆材を金型内に注入する定圧注入工程であることを特徴とする型内被覆方法。 5. The in-mold coating method according to claim 4, wherein the injecting step is a constant pressure injecting step of injecting the covering material into the mold until the injecting pressure of the covering material supply device reaches a set pressure. Method.
JP2009079921A 2009-03-23 2009-03-27 In-mold coating method Expired - Fee Related JP5383277B2 (en)

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JPH06246762A (en) * 1993-02-25 1994-09-06 Sekisui Chem Co Ltd Molding method for coating in mold
JPH06328504A (en) * 1993-05-26 1994-11-29 Dainippon Toryo Co Ltd Method for in-mold coating
JPH08142119A (en) * 1994-09-21 1996-06-04 Mitsubishi Eng Plast Kk Method for injection molding thermoplastic resin
JP2001038737A (en) * 1999-07-28 2001-02-13 Ube Ind Ltd In-mold coating method
JP2010188573A (en) * 2009-02-17 2010-09-02 Dainippon Toryo Co Ltd In-mold coating molding method and in-mold coating-molded article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06246762A (en) * 1993-02-25 1994-09-06 Sekisui Chem Co Ltd Molding method for coating in mold
JPH06328504A (en) * 1993-05-26 1994-11-29 Dainippon Toryo Co Ltd Method for in-mold coating
JPH08142119A (en) * 1994-09-21 1996-06-04 Mitsubishi Eng Plast Kk Method for injection molding thermoplastic resin
JP2001038737A (en) * 1999-07-28 2001-02-13 Ube Ind Ltd In-mold coating method
JP2010188573A (en) * 2009-02-17 2010-09-02 Dainippon Toryo Co Ltd In-mold coating molding method and in-mold coating-molded article

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