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JP5882038B2 - In-mold painting mold - Google Patents
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JP5882038B2 - In-mold painting mold - Google Patents

In-mold painting mold Download PDF

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JP5882038B2
JP5882038B2 JP2011265475A JP2011265475A JP5882038B2 JP 5882038 B2 JP5882038 B2 JP 5882038B2 JP 2011265475 A JP2011265475 A JP 2011265475A JP 2011265475 A JP2011265475 A JP 2011265475A JP 5882038 B2 JP5882038 B2 JP 5882038B2
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mold
molded product
resin molded
cavity
coating
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JP2013116601A (en
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貴裕 岩屋
貴裕 岩屋
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Kojima Industries Corp
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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

本発明は、型内塗装用型に関し、詳しくは、樹脂成形品をセットできるキャビティを形成可能な一対の金型を備えた型内塗装用型に関する。   The present invention relates to an in-mold coating mold, and more particularly to an in-mold coating mold including a pair of molds capable of forming a cavity in which a resin molded product can be set.

従来、一対の金型のキャビティの中で樹脂成形品の表面を塗装する技術、いわゆる、型内塗装の技術が既に知られている。ここで、下記特許文献1には、一対の金型を僅かに型開きしてキャビティに形成される隙間に塗料を流し込んで樹脂成形品の表面を塗装する技術が開示されている。これにより、例えば、ディッピング、フローコート、スプレー等による塗装と比較すると、塗料の使用量を抑えることができる。   Conventionally, a technique for coating the surface of a resin molded product in a pair of mold cavities, that is, a so-called in-mold coating technique is already known. Here, the following Patent Document 1 discloses a technique in which a pair of molds are slightly opened and a paint is poured into a gap formed in a cavity to coat the surface of a resin molded product. Thereby, the usage-amount of a coating material can be restrained compared with the coating by dipping, a flow coat, a spray etc., for example.

特許第4512005号Patent No. 451205

しかしながら、上述した特許文献1の技術では、型開きしてキャビティに形成される隙間に塗料を流し込むため、樹脂成形品の一方側の表面(樹脂成形品の両面のうち、型開き側の表面)しか塗装できなかった。   However, in the technique of Patent Document 1 described above, since the paint is poured into the gap formed in the cavity by opening the mold, the surface on one side of the resin molded product (the surface on the mold opening side of both surfaces of the resin molded product) I could only paint.

本発明は、このような課題を解決しようとするもので、その目的は、型内塗装であっても、樹脂成形品の両面を塗装できる型内塗装用型を提供することである。   The present invention is intended to solve such problems, and an object thereof is to provide a mold for in-mold coating that can coat both surfaces of a resin molded product even in in-mold coating.

本発明は、上記の目的を達成するためのものであって、以下のように構成されている。
請求項1に記載の発明は、樹脂成形品をセットできるキャビティを形成可能な一対の金型を備え、このキャビティにセットした樹脂成形品の表面とキャビティの表面との間に形成される隙間に塗料を流し込んで樹脂成形品の表面を塗装する型内塗装用型であって、樹脂成形品の両面とキャビティの表面との間に形成される各隙間は、一対の金型の各対向部が樹脂成形品の周縁に形成されている張出部を嵌め込むことで形成されることを特徴とする構成である。
この構成によれば、一対の金型の各対向部が樹脂成形品の張出部を挟み込むようにキャビティに樹脂成形品をセットすると、樹脂成形品の両面(表面と裏面)とキャビティの表面との間に隙間が形成されることとなる。そのため、この隙間に塗料を流し込んで樹脂成形品の両面を塗装できる。したがって、従来技術と同様に、型内塗装であっても、樹脂成形品の両面を塗装できる。


The present invention is for achieving the above object, and is configured as follows.
The invention described in claim 1 includes a pair of molds capable of forming a cavity in which a resin molded product can be set, and a gap formed between the surface of the resin molded product set in the cavity and the surface of the cavity. A mold for in-mold coating in which the surface of a resin molded product is poured by pouring paint, and each gap formed between both surfaces of the resin molded product and the surface of the cavity is formed by each facing portion of a pair of molds It is a structure characterized by being formed by fitting the overhang | projection part currently formed in the periphery of the resin molded product.
According to this configuration, when the resin molded product is set in the cavity so that the opposing portions of the pair of molds sandwich the overhang portion of the resin molded product, A gap is formed between the two. Therefore, both surfaces of the resin molded product can be painted by pouring paint into the gap. Therefore, similarly to the prior art, both surfaces of the resin molded product can be painted even with in-mold coating.


図1は、本発明の実施例に係る樹脂成形品を成形する成形機の型締め状態を示す模式図である。FIG. 1 is a schematic diagram showing a clamped state of a molding machine for molding a resin molded product according to an embodiment of the present invention. 図2は、図1において、溶融樹脂を射出した状態を示している。FIG. 2 shows a state in which the molten resin is injected in FIG. 図3は、成形機から取り出した樹脂成形品を示している。FIG. 3 shows a resin molded product taken out from the molding machine. 図4は、本発明の実施例に係る樹脂成形品を塗装する塗装機の型締め状態を示す模式図である。FIG. 4 is a schematic view showing a mold clamping state of a coating machine for coating a resin molded product according to an embodiment of the present invention. 図5は、図3の樹脂成形品を塗装機にセットした状態を示す模式図である。FIG. 5 is a schematic view showing a state where the resin molded product of FIG. 3 is set in a coating machine. 図6は、図5において、塗料を流し込んだ状態を示している。FIG. 6 shows a state in which the paint is poured in FIG. 図7は、塗装機から取り出した樹脂成形品を示している。FIG. 7 shows the resin molded product taken out from the coating machine. 図8は、図7に示す状態から、張出部をトリミングした後の樹脂成形品を示している。FIG. 8 shows the resin molded product after trimming the protruding portion from the state shown in FIG.

以下、本発明を実施するための形態を、図1〜8を用いて説明する。まず、成形機1と塗装機2との構成を個別に説明していく。はじめに、図1を参照して、成形機1の構成から説明していく。成形機1は、主として、下型10と上型20とから構成されている。上型20には、溶融樹脂Mを射出可能なノズル12が設けられている。また、上型20には、ノズル12と後述するキャビティ30とを連通させるスプルー14が形成されている。   Hereinafter, the form for implementing this invention is demonstrated using FIGS. First, the configuration of the molding machine 1 and the coating machine 2 will be described individually. First, the configuration of the molding machine 1 will be described with reference to FIG. The molding machine 1 is mainly composed of a lower mold 10 and an upper mold 20. The upper mold 20 is provided with a nozzle 12 capable of injecting the molten resin M. Further, the upper mold 20 is formed with a sprue 14 that allows the nozzle 12 to communicate with a cavity 30 described later.

これら下型10と上型20との各対向面には、これら下型10と上型20とを型締めすると、樹脂成形品70を一体的に成形可能なキャビティ30が形成されている、すなわち、所望する形状の樹脂成形品70と、この樹脂成形品70の周縁から外方に向けて張り出す格好の張出部74と位置決めリブ76とを一体的に成形可能なキャビティ30が形成されている。   Cavities 30 capable of integrally molding the resin molded product 70 are formed on the opposing surfaces of the lower mold 10 and the upper mold 20 when the lower mold 10 and the upper mold 20 are clamped. A cavity 30 capable of integrally molding a resin molded product 70 having a desired shape, a suitable overhanging portion 74 projecting outward from the periphery of the resin molded product 70, and a positioning rib 76 is formed. Yes.

なお、これら下型10と上型20とは、型締め装置(図示しない)によって、相対的に型締め型開き可能となっている。これにより、ノズル12から射出された溶融樹脂Mをキャビティ30に充填させることができる。成形機1は、このように構成されている。   The lower mold 10 and the upper mold 20 can be relatively opened by a mold clamping device (not shown). Thereby, the molten resin M injected from the nozzle 12 can be filled into the cavity 30. The molding machine 1 is configured in this way.

次に、図4を参照して、塗装機2の構成を説明する。塗装機2も、主として、下型40と上型50とから構成されている。この塗装機2が、特許請求の範囲に記載の「型内塗装用型」に相当する。また、これら下型40と上型50とが、特許請求の範囲に記載の「一対の金型」に相当する。これら下型40と上型50とには、塗料Pを流し込み可能なノズル42、52がそれぞれ設けられている。また、これら下型40と上型50とには、ノズル42、52とキャビティ60とをそれぞれ連通させるスプルー44、54が形成されている。   Next, the configuration of the coating machine 2 will be described with reference to FIG. The coating machine 2 is also mainly composed of a lower mold 40 and an upper mold 50. The coating machine 2 corresponds to the “in-mold coating mold” described in the claims. The lower mold 40 and the upper mold 50 correspond to “a pair of molds” recited in the claims. The lower mold 40 and the upper mold 50 are provided with nozzles 42 and 52 into which the paint P can be poured, respectively. The lower mold 40 and the upper mold 50 are formed with sprues 44 and 54 for communicating the nozzles 42 and 52 with the cavity 60, respectively.

これら下型40と上型50との各対向面には、これら下型40と上型50とを型締めすると、樹脂成形品70より僅かに大きい形状のキャビティ60が形成されている。ここで言う僅かに大きい形状とは、これら下型40と上型50の各対向部(下型40と上型50との対向面が形成されている部位)40a、50aが樹脂成形品70の張出部74を挟み込んだとき、樹脂成形品70の両面(表面と裏面)とキャビティ60の表面との間に隙間S、Sが形成される程度のものである(図5参照)。   A cavity 60 having a shape slightly larger than that of the resin molded product 70 is formed on each facing surface of the lower mold 40 and the upper mold 50 when the lower mold 40 and the upper mold 50 are clamped. Here, the slightly larger shape means that the opposing portions of the lower die 40 and the upper die 50 (portions where the opposing surfaces of the lower die 40 and the upper die 50 are formed) 40a, 50a are the resin molded product 70. When the overhanging portion 74 is sandwiched, gaps S and S are formed between both surfaces (front and back surfaces) of the resin molded product 70 and the surface of the cavity 60 (see FIG. 5).

なお、これら下型40と上型50とも、型締め装置(図示しない)によって、相対的に型締め型開き可能となっている。これにより、ノズル42、52から流し込まれた塗料Pをキャビティ60に充填させることができる。また、これら下型40と上型50との各対向面には、樹脂成形品70をキャビティ60にセットしたとき、樹脂成形品70に形成されている位置決めリブ76を嵌め込み可能な凹溝40b、50bが形成されている。これにより、キャビティ60にセットした樹脂成形品70の位置決めを行うことができる。塗装機2は、このように構成されている。   The lower mold 40 and the upper mold 50 can be relatively opened by a mold clamping device (not shown). Thereby, the paint P poured from the nozzles 42 and 52 can be filled in the cavity 60. Further, on each facing surface of the lower mold 40 and the upper mold 50, when the resin molded product 70 is set in the cavity 60, a concave groove 40b into which a positioning rib 76 formed on the resin molded product 70 can be fitted, 50b is formed. Thereby, the resin molded product 70 set in the cavity 60 can be positioned. The coating machine 2 is configured in this way.

続いて、図1〜3、5〜8を参照して、上述した成形機1と塗装機2との動作を個別に説明していく。はじめに、図1〜3を参照して、成形機1の動作から説明していく。まず、図1に示すように、成形機1を型締め状態にする。次に、図2に示すように、ノズル12から溶融樹脂Mを射出してキャビティ30に充填させる。次に、射出した溶融樹脂Mを冷却固化させる。最後に、成形機1を型開きして、冷却固化させた溶融樹脂M、すなわち、出来上がった樹脂成形品70を取り出す。このようにして張出部74と位置決めリブ76とを有する樹脂成形品70が出来上がる(図3参照)。   Next, the operations of the molding machine 1 and the coating machine 2 described above will be individually described with reference to FIGS. First, the operation of the molding machine 1 will be described with reference to FIGS. First, as shown in FIG. 1, the molding machine 1 is put into a clamped state. Next, as shown in FIG. 2, the molten resin M is injected from the nozzle 12 to fill the cavity 30. Next, the injected molten resin M is cooled and solidified. Finally, the molding machine 1 is opened to take out the cooled and solidified molten resin M, that is, the finished resin molded product 70. Thus, the resin molded product 70 having the overhanging portion 74 and the positioning rib 76 is completed (see FIG. 3).

次に、図5〜8を参照して、塗装機2の動作を説明する。まず、図5に示すように、樹脂成形品70をキャビティ60にセットして塗装機2を型締め状態にする。すなわち、下型40と上型50との各対向部40a、50aが樹脂成形品70の張出部74を挟み込むように塗装機2を型締め状態にする。これにより、既に説明したように、樹脂成形品70の両面(表面と裏面)とキャビティ60の表面との間に隙間S、Sが形成される。このとき、樹脂成形品70に形成されている位置決めリブ76は下型40と上型50との凹溝40b、50bに嵌め込まれているため、キャビティ60にセットした樹脂成形品70の位置決めが行われている。   Next, the operation of the coating machine 2 will be described with reference to FIGS. First, as shown in FIG. 5, the resin molded product 70 is set in the cavity 60, and the coating machine 2 is put into a mold-clamping state. That is, the coating machine 2 is placed in a mold-clamping state so that the opposing portions 40 a and 50 a of the lower mold 40 and the upper mold 50 sandwich the overhanging portion 74 of the resin molded product 70. Thereby, as already explained, gaps S and S are formed between both surfaces (front and back surfaces) of the resin molded product 70 and the surface of the cavity 60. At this time, since the positioning ribs 76 formed in the resin molded product 70 are fitted in the concave grooves 40b and 50b between the lower mold 40 and the upper mold 50, the resin molded product 70 set in the cavity 60 is positioned. It has been broken.

次に、図6に示すように、ノズル42、52から塗料Pを流し込み隙間S、Sに充填させる。次に、充填させた塗料Pを乾燥させる。次に、図7に示すように、塗装機2を型開きして、塗料Pが塗られた樹脂成形品70を取り出す。最後に、図8に示すように、樹脂成形品70から張出部74をトリミング(カット)する。   Next, as shown in FIG. 6, the coating material P is poured from the nozzles 42 and 52 to fill the gaps S and S. Next, the filled paint P is dried. Next, as shown in FIG. 7, the coating machine 2 is opened and the resin molded product 70 coated with the paint P is taken out. Finally, as shown in FIG. 8, the protruding portion 74 is trimmed (cut) from the resin molded product 70.

本発明の実施例に係る塗装機2の下型40と上型50とは、上述したように構成されている。この構成によれば、塗装機2の下型40と上型50の各対向部40a、50aが樹脂成形品70の張出部74を挟み込むようにキャビティ60に樹脂成形品70をセットすると、樹脂成形品70の両面(表面と裏面)とキャビティ60の表面との間に隙間S、Sが形成されることとなる。そのため、この隙間S、Sに塗料Pを流し込んで樹脂成形品70の両面を塗装できる。したがって、従来技術と同様に、型内塗装であっても、樹脂成形品70の両面を塗装できる。   The lower mold 40 and the upper mold 50 of the coating machine 2 according to the embodiment of the present invention are configured as described above. According to this configuration, when the resin molded product 70 is set in the cavity 60 such that the opposing portions 40a and 50a of the lower mold 40 and the upper mold 50 of the coating machine 2 sandwich the overhanging portion 74 of the resin molded product 70, the resin Gaps S and S are formed between both surfaces (the front surface and the back surface) of the molded product 70 and the surface of the cavity 60. Therefore, both surfaces of the resin molded product 70 can be painted by pouring the paint P into the gaps S and S. Therefore, as in the prior art, both surfaces of the resin molded product 70 can be painted even by in-mold coating.

上述した内容は、あくまでも本発明の一実施の形態に関するものであって、本発明が上記内容に限定されることを意味するものではない。
実施例では、樹脂成形品70の両面に同一の塗料P、Pを塗る形態を説明した。しかし、これに限定されるものでなく、樹脂成形品70の両面に色や素材が異なる塗料を塗る形態でも構わない。
The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, the form in which the same paints P and P are applied to both surfaces of the resin molded product 70 has been described. However, the present invention is not limited to this, and a form in which paints having different colors and materials are applied to both surfaces of the resin molded product 70 may be used.

また、実施例では、樹脂成形品70の両面に塗料P、Pを塗る形態を説明した。しかし、これに限定されるものでなく、樹脂成形品70の両面に熱硬化性のコーティング材を塗る形態でも構わない。その場合、隙間S、Sにコーティング材を流し込んだ後、ノズル42、52を各金型40、50から外すことにより、各金型40、50からの熱がノズル42、52に伝播することを防止できる。したがって、コーティング材がノズル42、52内で硬化することを防止できる。   Moreover, in the Example, the form which coats the coating materials P and P on both surfaces of the resin molded product 70 was demonstrated. However, the present invention is not limited to this, and a form in which a thermosetting coating material is applied to both surfaces of the resin molded product 70 may be used. In that case, after pouring the coating material into the gaps S and S, the nozzles 42 and 52 are removed from the molds 40 and 50, so that the heat from the molds 40 and 50 is transmitted to the nozzles 42 and 52. Can be prevented. Therefore, the coating material can be prevented from curing in the nozzles 42 and 52.

2 塗装機(型内塗装用型)
40 下型(金型)
40a 対向部
50 上型(金型)
50a 対向部
60 キャビティ
70 樹脂成形品
74 張出部
P 塗料
S 隙間
2 Coating machine (for in-mold coating)
40 Lower mold (mold)
40a Opposing part 50 Upper mold (mold)
50a Opposing portion 60 Cavity 70 Resin molded product 74 Overhang portion P Paint S Clearance

Claims (1)

樹脂成形品をセットできるキャビティを形成可能な一対の金型を備え、このキャビティにセットした樹脂成形品の表面とキャビティの表面との間に形成される隙間に塗料を流し込んで樹脂成形品の表面を塗装する型内塗装用型であって、
樹脂成形品の両面とキャビティの表面との間に形成される各隙間は、一対の金型の各対向部が樹脂成形品の周縁に形成されている張出部を嵌め込むことで形成されることを特徴とする型内塗装用型。
It has a pair of molds that can form a cavity that can set a resin molded product, and paint is poured into the gap formed between the surface of the resin molded product set in this cavity and the surface of the cavity, and the surface of the resin molded product A mold for in-mold painting,
The gaps formed between both surfaces of the resin molded product and the surface of the cavity are formed by fitting the protruding portions formed at the peripheral edges of the resin molded product with the opposing portions of the pair of molds. A mold for in-mold painting characterized by this.
JP2011265475A 2011-12-05 2011-12-05 In-mold painting mold Expired - Fee Related JP5882038B2 (en)

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JP2011265475A JP5882038B2 (en) 2011-12-05 2011-12-05 In-mold painting mold

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JP2013116601A JP2013116601A (en) 2013-06-13
JP5882038B2 true JP5882038B2 (en) 2016-03-09

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JP4131232B2 (en) * 2003-12-02 2008-08-13 豊田合成株式会社 In-mold coated molded product, manufacturing method thereof, and mold for in-mold coating molding

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