WO2024070183A1 - 樹脂成形体および樹脂成形体の製造方法 - Google Patents
樹脂成形体および樹脂成形体の製造方法 Download PDFInfo
- Publication number
- WO2024070183A1 WO2024070183A1 PCT/JP2023/027611 JP2023027611W WO2024070183A1 WO 2024070183 A1 WO2024070183 A1 WO 2024070183A1 JP 2023027611 W JP2023027611 W JP 2023027611W WO 2024070183 A1 WO2024070183 A1 WO 2024070183A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- coating layer
- coating
- resin molded
- molded body
- 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.)
- Ceased
Links
Images
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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1679—Making multilayered or multicoloured articles applying surface layers onto injection-moulded substrates inside the mould cavity, e.g. in-mould coating [IMC]
Definitions
- This disclosure relates to a resin molded body and a method for manufacturing the resin molded body.
- Patent Document 2 There is also a known resin molding method that uses a core-back type injection molding machine to integrate two types of resin materials (see, for example, Patent Document 2).
- Patent Document 1 does not disclose the formation of two coating layers. Furthermore, Patent Document 2 discloses a method for integrating two resin layers, but does not disclose a method for forming the coating layers.
- the present disclosure provides a resin molded body having multiple coating layers formed thereon using an in-mold coating method, and a method for manufacturing the resin molded body.
- the resin molded body according to the present disclosure comprises a substrate containing a resin, a first coating layer having a thickness of 100 micrometers or more and 1000 micrometers or less formed on the surface of the substrate, and a second coating layer having a thickness of 100 micrometers or more and 1000 micrometers or less formed on the surface of the first coating layer.
- the method for producing a resin molded body according to the present disclosure includes a step of injecting a resin material into a cavity formed by a first mold and a second mold to form a substrate, a first coating step of opening the first mold and the second mold, injecting a first coating material between the substrate and the first mold, and forming a first coating layer on the surface of the substrate, and a second coating step of opening the first mold and the second mold again, injecting a second coating material between the first coating layer and the first mold, and forming a second coating layer on the surface of the first coating layer.
- the first coating layer has a thickness equivalent to that of a coating layer formed by an in-mold coating method
- the second coating layer also has a thickness equivalent to that of a coating layer formed by an in-mold coating method.
- the first coating layer and the second coating layer can be formed by an in-mold coating method.
- FIG. 1 is a diagram showing a method for manufacturing a resin molded body.
- FIG. 2 shows a method for manufacturing a resin molded body.
- the resin molded body 1 comprises a substrate 2, a first coating layer 4, and a second coating layer 6.
- the resin molded body 1 is a resin member used as a decorative panel for the interior of an automobile, a bumper, etc.
- the resin molded body 1 has a front surface 1a and a back surface 1b.
- the front surface 1a of the resin molded body 1 is assembled so as to face the automobile user.
- the front surface 1a of the resin molded body 1 is disposed so as to face the outside of the automobile.
- the substrate 2 is a resin member that serves as a base for forming the first coating layer 4.
- the substrate 2 is made of a thermoplastic resin material.
- resin materials include polypropylene, polyethylene, ABS resin (acrylonitrile-butadiene-styrene copolymer), PC resin (polycarbonate resin), etc.
- the first coating layer 4 is a coating layer formed on the surface 1a side of the substrate 2. More specifically, the first coating layer 4 is formed from a material for forming the first coating that is attached to the surface of the substrate 2 by an in-mold coating method.
- the material for forming the first coating may include a paint suitable for the in-mold coating method described in, for example, JP-A-6-107750 and JP-A-8-113761.
- the first coating layer 4 is a color layer formed from a paint containing a colorant.
- the first coating layer 4 may include a so-called glittering material made of metal pieces, mica pieces, glass beads, and the like.
- the thickness of the first coating layer 4 formed by the in-mold coating method is 100 micrometers or more and 1000 micrometers or less.
- the first coating layer 4 is a coating layer containing a release agent and/or having a release agent attached to its surface. That is, the paint for the first coating layer 4 may contain a release agent. The paint for the first coating layer 4 may not contain a release agent component, and the release agent sprayed onto the mold may be laminated on the coating surface.
- the release agent is a chemical that suppresses the adhesion of the first coating layer 4 to the first mold 22 (see FIG. 3) described later. The release agent makes it easier for the molded product to be separated from the mold.
- the release agent is, for example, a chemical that contains light naphtha or wax.
- the wax is, for example, paraffin wax and micro wax.
- the release agent may contain polydimethylsiloxane.
- the second coating layer 6 described later is formed with the release agent attached to the surface of the first coating layer 4 formed by the in-mold coating method.
- the second coating layer 6 is a coating layer formed on the surface of the first coating layer 4.
- the second coating layer 6 includes a paint formed by mixing and curing two different second coating forming materials.
- the paint forming the second coating layer 6 is a urethane paint formed by mixing, reacting, and curing a polyol (an example of a first material) and an isocyanate (an example of a second material).
- the second coating layer 6 may be a paint other than a urethane paint, as long as it includes a paint formed by mixing two or more different materials and curing them. Curing includes curing by reaction of mixing different materials, and curing by lowering the temperature after mixing two different materials.
- the second coating layer 6 is a clear layer that is a transparent coating that covers the first coating layer 4.
- the clear layer has the function of adding gloss to the color of the first coating layer 4.
- the clear layer also has the function of protecting the first coating layer 4.
- the second coating layer 6 is formed from a paint that does not contain a colorant, or a translucent paint that contains a colorant.
- the second coating layer 6 may be any paint that is made by mixing two different materials and hardening.
- the thickness of the second coating layer 6 is 100 micrometers or more and 1000 micrometers or less.
- the thickness of the clear layer, which is the second coating layer 6 is set to be equal to or thinner than the thickness of the color layer, which is the first coating layer 4.
- the mold device 20 used in the in-mold coating method is a resin injection molding device including a first mold (an example of a first mold) 22, a second mold (an example of a second mold) 24, a resin injector 26, and a paint injector 28.
- the first mold 22 and the second mold 24 form a cavity 30 by closing the mold.
- the mold device 20 may be any mold as long as it is capable of the in-mold coating method.
- the resin injector 26 is a nozzle for injecting the resin material that forms the substrate 2 (see FIG. 2).
- the resin injector 26 is arranged on the second mold 24 side of the cavity 30.
- the resin injector 26 may be arranged facing the supply passage 30a.
- the supply passage 30a is connected to the cavity 30.
- the paint injector 28 is a nozzle for injecting the first coating film forming material and the second coating film forming material.
- the paint injector 28 is arranged on the first mold 22 side of the cavity 30.
- a resin material is injected from the resin injector 26 into the cavity 30 to form the substrate 2.
- the mold device 20 is opened and the second mold 24 is pulled away from the first mold 22, which separates the first mold 22 from the substrate 2.
- a release agent is applied to the surface of the first mold 22 facing the cavity 30 to form a layer of the release agent. If the first coating material contains a release agent, the release agent application step may be omitted. If the first coating material does not contain a release agent, a release agent may be applied to the surfaces of the first mold 22 and/or the second mold 24 facing the cavity 30 before the substrate 2 is formed.
- the second mold 24 when forming the first coating layer 4, the second mold 24 is separated from the first mold 22 so that the distance between the first mold 22 and the substrate 2 is 100 micrometers or more and 1000 micrometers or less.
- the material for forming the first coating is injected into the gap between the first mold 22 and the substrate 2 via the paint injector 28 (first coating process).
- the first mold 22 and/or the second mold 24 may be heated so that the material for forming the first coating can flow more easily.
- the first mold 22 when the first coating layer 4 is formed, the first mold 22 is moved toward the second mold 24, and the first coating layer 4 is compressed (see the white arrow in FIG. 4(c)) (first compression step). This allows the first coating layer 4 to be adhered to the substrate 2. Furthermore, the surface of the first mold 22 can be transferred to the first coating layer 4. In addition, by compressing the first coating layer 4, it is possible to prevent sink marks from occurring on the surface of the first coating layer 4 due to shrinkage when the first coating layer 4 hardens. At this time, it is preferable that the first distance by which the first mold 22 is moved toward the second mold 24 is changed depending on the thickness of the first coating layer 4. It is preferable that the first distance is larger as the thickness of the first coating layer 4 is thick. This makes it easier to adhere the first coating layer 4 to the substrate 2 even when the thickness of the first coating layer 4 is thick. The same applies to the second coating layer 6 described later.
- the mold device 20 is opened again so that the first mold 22 is at a distance of 100 micrometers to 1000 micrometers from the surface of the first coating layer 4 (see the white arrow in FIG. 5(a)).
- a second coating material containing two different materials for forming the second coating layer 6 is injected into the cavity 30 (second coating process).
- the two different materials are mixed at the tip of the paint injector 28 and injected. The two injected materials react and harden as they flow over the surface of the first coating layer 4 as paint.
- the thickness of the second coating layer 6 is set to be equal to or thicker than the thickness of the first coating layer 4. Therefore, the second distance by which the first mold 22 is moved when the second coating layer 6 is compressed is equal to or longer than the first distance by which the first mold 22 is moved when the first coating layer 4 is compressed.
- the mold device 20 is opened, the first mold 22 is separated from the second mold 24, and the resin molded body 1 is removed.
- the first coating layer 4 and the second coating layer 6 can be formed by the in-mold coating method. This allows the use of volatile organic compounds to be reduced compared to forming a coating layer by application. Furthermore, the second coating layer 6 is formed on the first coating layer 4 by the in-mold coating method. This allows the formation of a thick coating layer (e.g., a coating layer with a thickness of 100 micrometers or more) that cannot be formed by application due to sagging. As a result, the durability of the resin molded body 1 is improved.
- a thick coating layer e.g., a coating layer with a thickness of 100 micrometers or more
- the first coating film layer 4 and the second coating film layer 6 are compressed. This makes it possible to bond the coating film layers more firmly and make them less likely to peel off. Furthermore, the first coating film layer 4 and the second coating film layer 6 are manufactured using the same first mold 22 and second mold 24. This makes it possible to reduce manufacturing costs compared to using separate molds.
- the first mold 22 and the second mold 24 are not opened (i.e., the cavity 30 is not opened) until the step of removing the resin molded body 1. This prevents dust and other particles from adhering to the coating layers. As a result, the resin molded body 1 manufactured by this manufacturing method does not suffer from peeling of the coating, and is easy to maintain its good appearance.
- the resin molded body 1 is described as a component used in automobiles, but the present disclosure is not limited to this.
- the resin molded body 1 may be a resin component used for things other than automobiles.
- thermoplastic resins such as polypropylene, polyethylene, ABS resin, and PC resin have been exemplified as the resin material forming the substrate 2, the present disclosure is not limited to these.
- the substrate 2 may be, for example, a thermoplastic resin such as polyamide, polyethylene terephthalate, or modified polyphenylene ether, or an alloy material of these thermoplastic resins, or even a resin material in which fibrous or scaly filler is blended with these thermoplastic resins.
- the substrate 2 may be any resin as long as it is formed from a thermoplastic resin.
- the first coating layer 4 and the second coating layer 6 are formed between the substrate 2 and the first mold 22, but the present disclosure is not limited to this.
- the substrate 2 may be attached to the first mold 22 side, a gap may be formed between the second mold 24 and the substrate 2, and then a coating material may be injected to form the first coating layer 4 and the second coating layer 6 between the substrate 2 and the second mold 24.
- resin molded body 1a front surface 1b: back surface 2: substrate 4: first coating layer 6: second coating layer 20: mold device 22: first mold 24: second mold 26: resin injector 28: paint injector 30: cavity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
以上、本開示の実施形態について説明したが、本開示は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。
1a :表面
1b :裏面
2 :基材
4 :第1塗膜層
6 :第2塗膜層
20 :金型装置
22 :第1金型
24 :第2金型
26 :樹脂インジェクタ
28 :塗料インジェクタ
30 :キャビティ
Claims (4)
- 樹脂を含む基材と、
前記基材の表面に形成される厚さが100マイクロメートル以上1000マイクロメートル以下の第1塗膜層と、
前記第1塗膜層の表面に形成される厚さが100マイクロメートル以上1000マイクロメートル以下の第2塗膜層と、
を備える樹脂成形体。 - 前記第1塗膜層および前記第2塗膜層の少なくとも一方は、第1材料と前記第1材料と異なる第2材料とが混合して硬化した塗料を含む、
請求項1に記載の樹脂成形体。 - 前記第1材料がポリオールであり、前記第2材料がイソシアネートである、
請求項2に記載の樹脂成形体。 - 第1型と第2型とにより形成されるキャビティに樹脂材料を注入し、基材を形成する工程と、
前記第1型と前記第2型とを開き、前記基材と前記第1型との間に第1塗膜形成用材料を注入し、前記基材の表面に第1塗膜層を形成する第1塗膜工程と、
前記第1型と前記第2型とを再度開き、前記第1塗膜層と前記第1型との間に第2塗膜形成用材料を注入し、前記第1塗膜層の表面に第2塗膜層を形成する第2塗膜工程と、
を備える、樹脂成形体の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024512088A JP7670930B2 (ja) | 2022-09-30 | 2023-07-27 | 樹脂成形体および樹脂成形体の製造方法 |
| CN202380051116.5A CN119403669A (zh) | 2022-09-30 | 2023-07-27 | 树脂成型体以及树脂成型体的制造方法 |
| EP23871426.5A EP4596211A4 (en) | 2022-09-30 | 2023-07-27 | RESIN CAST BODY AND PROCESS FOR PRODUCING RESIN CAST BODY |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-157618 | 2022-09-30 | ||
| JP2022157618 | 2022-09-30 | ||
| JP2022-162696 | 2022-10-07 | ||
| JP2022162696 | 2022-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024070183A1 true WO2024070183A1 (ja) | 2024-04-04 |
Family
ID=90477052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/027611 Ceased WO2024070183A1 (ja) | 2022-09-30 | 2023-07-27 | 樹脂成形体および樹脂成形体の製造方法 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4596211A4 (ja) |
| JP (1) | JP7670930B2 (ja) |
| CN (1) | CN119403669A (ja) |
| WO (1) | WO2024070183A1 (ja) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06107750A (ja) | 1992-10-01 | 1994-04-19 | Dainippon Toryo Co Ltd | 型内被覆組成物 |
| JPH08113761A (ja) | 1994-10-18 | 1996-05-07 | Mitsubishi Motors Corp | インモールドコーティング用樹脂組成物及びその製造方法 |
| JP2005088527A (ja) | 2003-09-19 | 2005-04-07 | Idemitsu Kosan Co Ltd | 多色成形品、およびその成形方法 |
| JP2006076174A (ja) | 2004-09-10 | 2006-03-23 | Ube Machinery Corporation Ltd | 型内被覆成形方法 |
| JP2013252685A (ja) * | 2012-06-08 | 2013-12-19 | Seiren Co Ltd | 木質化粧成形品の製造方法 |
| JP2016518277A (ja) * | 2013-04-29 | 2016-06-23 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツングEvonik Roehm GmbH | 改善された特性を有するエラストマー−pmma層複合体 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03178412A (ja) * | 1989-12-07 | 1991-08-02 | Mazda Motor Corp | インモールドコート方法 |
| JPH04270618A (ja) * | 1991-02-27 | 1992-09-28 | Sekisui Chem Co Ltd | 型内被覆成形法 |
| JP4193305B2 (ja) * | 1999-09-29 | 2008-12-10 | 豊田合成株式会社 | 成形品の製造方法 |
| JP2009248477A (ja) * | 2008-04-08 | 2009-10-29 | Dainippon Printing Co Ltd | インモールド用転写箔、及びそれを用いた成形品 |
-
2023
- 2023-07-27 JP JP2024512088A patent/JP7670930B2/ja active Active
- 2023-07-27 CN CN202380051116.5A patent/CN119403669A/zh active Pending
- 2023-07-27 WO PCT/JP2023/027611 patent/WO2024070183A1/ja not_active Ceased
- 2023-07-27 EP EP23871426.5A patent/EP4596211A4/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06107750A (ja) | 1992-10-01 | 1994-04-19 | Dainippon Toryo Co Ltd | 型内被覆組成物 |
| JPH08113761A (ja) | 1994-10-18 | 1996-05-07 | Mitsubishi Motors Corp | インモールドコーティング用樹脂組成物及びその製造方法 |
| JP2005088527A (ja) | 2003-09-19 | 2005-04-07 | Idemitsu Kosan Co Ltd | 多色成形品、およびその成形方法 |
| JP2006076174A (ja) | 2004-09-10 | 2006-03-23 | Ube Machinery Corporation Ltd | 型内被覆成形方法 |
| JP2013252685A (ja) * | 2012-06-08 | 2013-12-19 | Seiren Co Ltd | 木質化粧成形品の製造方法 |
| JP2016518277A (ja) * | 2013-04-29 | 2016-06-23 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツングEvonik Roehm GmbH | 改善された特性を有するエラストマー−pmma層複合体 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4596211A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7670930B2 (ja) | 2025-04-30 |
| EP4596211A4 (en) | 2026-01-14 |
| EP4596211A1 (en) | 2025-08-06 |
| CN119403669A (zh) | 2025-02-07 |
| JPWO2024070183A1 (ja) | 2024-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101018655B (zh) | 装饰注塑制品以及转印膜和其制造方法 | |
| US20070269671A1 (en) | Decorated Injection-Moulded Article, Method for Producing One Such Article, and Transfer Film for Using in One Such Method | |
| US20090085235A1 (en) | Method and apparatus for making a microstructured or nanostructured article | |
| JP2009101670A (ja) | 型内塗装品の製造方法および型内塗装品形成装置 | |
| US20080164635A1 (en) | Method for making multi-finish thermoplastic articles | |
| JP4954894B2 (ja) | プラスチックから複合材料成形品を製造する方法及びその使用 | |
| CN104395060B (zh) | 用于制造具有至少一个粘附到其上的插入物的柔性外皮的方法 | |
| US20080182046A1 (en) | Process for the production of a composite structural component | |
| JP7670930B2 (ja) | 樹脂成形体および樹脂成形体の製造方法 | |
| JP3718496B2 (ja) | インサート成形品 | |
| TW201043438A (en) | In-mold coating article forming die | |
| KR101828486B1 (ko) | 융복합 인쇄가 적용된 필름인서트 사출성형 수지부품 및 그의 제조방법 | |
| US20130269872A1 (en) | Decorative sheet for decorating a surface of a three-dimensional molded material, method for manufacturing the same, and method for decorating the surface of the molded material using the same | |
| US20050103432A1 (en) | Method for producing an adhesive moulded body and a moulded body produced according to said method | |
| TW201016431A (en) | Plastic product and method for manufacturing the same | |
| JP7343361B2 (ja) | 樹脂成形品の製造方法 | |
| CN111093957A (zh) | 使用失去的密封件制造车辆装饰件的方法 | |
| KR102203067B1 (ko) | 차량용 폴리카보네이트 글레이징 및 제조방법 | |
| JP4017061B2 (ja) | 金型内塗装用金型及び金型内塗装方法 | |
| WO2012105664A1 (ja) | テキスタイル/樹脂積層構造ハウジング及びその製造装置 | |
| JP2946573B2 (ja) | 表面保護用フィルムおよび表面保護層を有する合成樹脂成型品の製造方法 | |
| JP4460697B2 (ja) | 加飾成型物の製造方法 | |
| JP2024030747A (ja) | 樹脂成形体および樹脂成形体の製造方法 | |
| JP2024162008A (ja) | 樹脂成形体、樹脂成形体を製造する製造装置および樹脂成形体の製造方法 | |
| CN118528623B (zh) | 发光装饰件及其制造方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ENP | Entry into the national phase |
Ref document number: 2024512088 Country of ref document: JP Kind code of ref document: A |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23871426 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380051116.5 Country of ref document: CN |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380051116.5 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023871426 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2023871426 Country of ref document: EP Effective date: 20250430 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2023871426 Country of ref document: EP |