JP3501853B2 - In-mold coat molding method of RIM molded article and its mold - Google Patents
In-mold coat molding method of RIM molded article and its moldInfo
- Publication number
- JP3501853B2 JP3501853B2 JP21784694A JP21784694A JP3501853B2 JP 3501853 B2 JP3501853 B2 JP 3501853B2 JP 21784694 A JP21784694 A JP 21784694A JP 21784694 A JP21784694 A JP 21784694A JP 3501853 B2 JP3501853 B2 JP 3501853B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded product
- rim
- cavity
- paint
- 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
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
- 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
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ＲＩＭ成形品のイン
モールドコート成形法およびその金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold coat molding method for an RIM molded product and a die for the same.
【０００２】[0002]
【従来の技術】熱硬化性樹脂を金型により圧縮して金型
のキャビティ面形状に賦形したシートモールデイングコ
ンパウンド（ＳＭＣ）成形品は、前記圧縮成形時に表面
にピンホール（微細な孔）を生じ易いため、その後に表
面塗装されて前記ピンホールの隠蔽がなされることが多
い。2. Description of the Related Art A sheet molding compound (SMC) molded product obtained by compressing a thermosetting resin into a mold cavity surface shape is a pinhole (fine hole) on the surface at the time of compression molding. Since it is apt to occur, the surface of the pinhole is often covered thereafter to conceal the pinhole.
【０００３】しかし、その塗装によって形成される塗膜
にも、ピンホールが発生し易いため、良好な成形品が得
難い問題があった。そこで、近年、前記問題を解決する
方法として、インモールドコート成形法（ＩＭＣ）が提
案されるようになった。このインモールドコート成形法
は、金型を用いてＳＭＣ成形品を圧縮成形した後、その
金型を僅かに開き、それにより生じたＳＭＣ成形品の表
面と金型キャビティ面の間の隙間に塗料を注入し、その
後金型を閉じて所定時間加圧することにより、ＳＭＣ成
形品の表面に塗膜を一体に形成するものである（特開平
４−１２５１１８号）。However, there is a problem that it is difficult to obtain a good molded product because pinholes are easily generated in the coating film formed by the coating. Therefore, in recent years, an in-mold coat molding method (IMC) has been proposed as a method for solving the above problem. In this in-mold coating method, an SMC molded product is compression-molded using a mold, and then the mold is slightly opened, resulting in a paint in the gap between the surface of the SMC molded product and the mold cavity surface. Is injected, and then the mold is closed and pressure is applied for a predetermined time to integrally form a coating film on the surface of the SMC molded product (JP-A-4-125118).
【０００４】このインモールドコート成形法によれば、
ＳＭＣの圧縮成形時にその表面に発生したピンホール
（微細な孔）内に塗料が圧入されて、平滑な塗膜で覆わ
れた成形品が得られる。しかも、その塗膜にはピンホー
ルが発生しない利点がある。According to this in-mold coat molding method,
The paint is pressed into pinholes (fine holes) generated on the surface of the SMC during compression molding, and a molded product covered with a smooth coating film is obtained. Moreover, there is an advantage that pinholes do not occur in the coating film.
【０００５】ところで、ＳＭＣ等の樹脂成形品は、その
用途に応じて最適な材質のものが用いられる。そのた
め、前記ＳＭＣ成形品に代えて、ＲＩＭ成形品が好適な
場合もある。このＲＩＭ成形品は、ポリオール成分とイ
ソシアネート成分の２系統に分かれたＲＩＭ原料を高圧
で衝突させ、その衝突後のＲＩＭ原料を金型内に吐出さ
せるようにした公知のリアクションインジェクション
（ＲＩＭ）成形機を用いて成形されるものである。By the way, a resin molded product such as SMC is made of an optimum material according to its application. Therefore, a RIM molded product may be suitable instead of the SMC molded product. This RIM molded product is a known reaction injection (RIM) molding machine in which a RIM raw material divided into two systems, a polyol component and an isocyanate component, is caused to collide at high pressure and the RIM raw material after the collision is discharged into a mold. It is molded by using.
【０００６】このＲＩＭ成形品においても、表面にピン
ホールが発生し易いため、金型から取り出した後に表面
を塗装して塗膜を形成することがなされる。しかし、塗
装により形成されたＲＩＭ成形品表面の塗膜にも、前記
ＳＭＣ成形品と同様にピンホールが発生し易い問題があ
る。したがって、このＲＩＭ成形品においても、前記イ
ンモールドコート成形法が適用できたら、表面塗膜にピ
ンホールのない成形品が簡単に得られ極めて好都合であ
る。Also in this RIM molded product, since pinholes are easily generated on the surface, it is necessary to form the coating film by painting the surface after taking out from the mold. However, the coating film on the surface of the RIM molded product formed by painting also has a problem that pinholes are likely to occur as in the SMC molded product. Therefore, also in this RIM molded product, if the in-mold coat molding method can be applied, a molded product having no pinhole in the surface coating film can be easily obtained, which is extremely convenient.
【０００７】[0007]
【発明が解決しようとする課題】そこで本発明は、ＲＩ
Ｍ成形品の表面に良好な塗膜を形成できるインモールド
コート成形法およびその金型を提供することを目的とす
る。Therefore, the present invention is based on the RI
An object of the present invention is to provide an in-mold coat molding method capable of forming a good coating film on the surface of an M-molded article and a mold thereof.
【０００８】[0008]
【課題を解決するための手段】本願の発明は二つあり、
第一の発明は、金型内のキャビティにＲＩＭ原料を充填
してＲＩＭ成形品を成形した後、前記金型内でのＲＩＭ
成形品の収縮により生じるＲＩＭ成形品表面とキャビテ
ィ面間の隙間に、前記金型の塗料注入孔から塗料を注入
して、前記ＲＩＭ成形品表面に塗膜を形成するに際し、
前記金型には塗料注入孔をキャビティ面に開口して設け
るとともに、該塗料注入孔と対向するキャビティ面側で
はキャビティの縁に外方へ突出する係合部成形空間を設
け、前記係合部成形空間を含むキャビティにＲＩＭ原料
を充填して、前記係合部成形空間と係合したＲＩＭ成形
品を成形し、前記ＲＩＭ成形品の収縮時に該ＲＩＭ成形
品と前記係合部成形空間との係合により、前記塗料注入
孔側のキャビティ面に当接したままＲＩＭ成形品が収縮
して塗料注入孔を塞ぐのを阻止することを特徴するＲＩ
Ｍ成形品のインモールドコート成形法に係る。There are two inventions of the present application,
A first aspect of the invention is to fill a cavity in a mold with a RIM raw material to mold an RIM molded product, and then perform RIM in the mold.
At the time of forming a coating film on the surface of the RIM molded product by injecting a paint from the paint injection hole of the mold into the gap between the surface of the RIM molded product and the cavity surface caused by shrinkage of the molded product,
The mold is provided with a paint injection hole opening on the cavity surface, and on the side of the cavity surface facing the paint injection hole, there is provided an engaging portion molding space projecting outward at the edge of the cavity. A cavity including a molding space is filled with RIM raw material to mold a RIM molded product engaged with the engaging portion molding space, and the RIM molded product and the engaging portion molding space are contracted when the RIM molded product contracts. The engagement prevents the RIM molded product from contracting and closing the paint injection hole while contacting the cavity surface on the paint injection hole side.
The present invention relates to an in-mold coat molding method for M molded products.
【０００９】また、第二の発明は、金型内のキャビティ
にＲＩＭ原料を充填してＲＩＭ成形品を成形した後、前
記金型内でのＲＩＭ成形品の収縮により生じるＲＩＭ成
形品表面とキャビティ面間の隙間に、前記金型に設けた
塗料注入孔から塗料を注入することにより、前記ＲＩＭ
成形品表面に塗膜を形成するための金型であって、前記
塗料注入孔をキャビティ面に開口して設けるとともに、
該塗料注入孔と対向するキャビティ面側ではキャビティ
の縁に外方へ突出する係合部成形空間を設けたことを特
徴とするＲＩＭ成形品のインモールドコート成形用金型
に係る。A second aspect of the invention is to fill the cavity in the mold with the RIM raw material to mold the RIM molded product, and then to shrink the RIM molded product in the mold and the cavity of the RIM molded product. By injecting paint into the gap between the surfaces through the paint injection hole provided in the mold, the RIM
A mold for forming a coating film on the surface of a molded article, wherein the paint injection hole is provided by opening the cavity surface,
The present invention relates to an in-mold coat molding die for an RIM molded product, characterized in that an engagement portion molding space that projects outward is provided at the edge of the cavity on the side of the cavity facing the paint injection hole.
【００１０】[0010]
【実施例】以下添付の図面に従ってこの発明を詳細に説
明する。図１はこの発明の金型の一実施例を示す断面
図、図２はその２−２断面図、図３は図１の要部拡大断
面図、図４はこの発明の成形法におけるＲＩＭ原料充填
時を示す断面図、図５はその要部拡大断面図、図６はそ
の収縮状態を示す断面図、図７はその収縮時の作用を示
す断面図、図８は収縮後を示す断面図、図９は塗料注入
状態を示す断面図、図１０はこの発明の実施により成形
された成形品の斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a sectional view showing an embodiment of a mold of the present invention, FIG. 2 is a sectional view taken along line 2-2, FIG. 3 is an enlarged sectional view of an essential part of FIG. 1, and FIG. 4 is a RIM raw material in a molding method of the present invention. FIG. 5 is a sectional view showing the time of filling, FIG. 5 is an enlarged sectional view of an essential part thereof, FIG. 6 is a sectional view showing its contracted state, FIG. 7 is a sectional view showing the action at the time of contracting, and FIG. 8 is a sectional view showing after contracting. FIG. 9 is a cross-sectional view showing a paint injection state, and FIG. 10 is a perspective view of a molded product molded by carrying out the present invention.
【００１１】まず、この発明の成形法の実施により得ら
れる成形品について説明する。図１０はその成形品１０
の斜視図である。この成形品１０は、ＲＩＭ成形品１１
の表面に塗膜１２が一体に形成されたもので、製品部１
３の縁に塗料注入部１４を有する状態で成形される。さ
らにこの塗料注入部１４の縁には、後記するインモール
ドコート成形時に収縮規制用として作用する薄肉の係合
部１５が突出形成されている。なお、前記塗料注入部１
４はその後に根元から切除される。First, a molded product obtained by carrying out the molding method of the present invention will be described. FIG. 10 shows the molded product 10.
FIG. This molded product 10 is a RIM molded product 11
The coating film 12 is integrally formed on the surface of the
It is molded with the coating material injection portion 14 at the edge of 3. Further, on the edge of the paint injecting portion 14, a thin engagement portion 15 that acts as a shrinkage restriction at the time of in-mold coating molding described later is formed to project. The paint injection unit 1
4 is then excised from the root.
【００１２】次にこの発明の成形法に用いる金型の一実
施例について説明する。図１ないし図３に示す金型２０
は、図１０に示した成形品１０を成形するためのもの
で、上型２１と下型３１とから構成され、内部にＲＩＭ
成形品成形用のキャビティ４１を有する。Next, an embodiment of the mold used in the molding method of the present invention will be described. Mold 20 shown in FIGS. 1 to 3.
Is for molding the molded product 10 shown in FIG. 10. It is composed of an upper mold 21 and a lower mold 31, and has a RIM inside.
It has a cavity 41 for molding a molded product.
【００１３】前記上型２１には、キャビティ面２２で開
口してキャビティ４１の塗料注入部成形空間４３に通じ
る塗料注入孔２３が形成されている。この塗料注入孔２
３には塗料注入機のノズル５１が挿入される。さらにこ
の実施例の上型２１には、図２に示すように、キャビテ
ィ４１に通じるＲＩＭ原料注入孔２４が形成され、この
ＲＩＭ原料注入口２４にＲＩＭ成形機のノズル５２が挿
入される。ＲＩＭ成形機は、公知のものが用いられる。The upper die 21 is provided with a paint injection hole 23 which opens at the cavity surface 22 and communicates with the paint injection portion molding space 43 of the cavity 41. This paint injection hole 2
A nozzle 51 of the paint injection machine is inserted into the nozzle 3. Further, as shown in FIG. 2, an RIM raw material injection hole 24 communicating with the cavity 41 is formed in the upper mold 21 of this embodiment, and a nozzle 52 of a RIM molding machine is inserted into the RIM raw material injection hole 24. A known RIM molding machine is used.
【００１４】前記キャビティ４１は、図１０に示した成
形品１０の製品部１３を成形する製品部成形空間４２
と、塗料注入部１４を成形する塗料注入部成形空間４３
とを有する。前記塗料注入部成形空間４３には前記上型
２１の塗料注入孔２３が通じ、またその塗料注入孔２３
と対向する下型キャビティ面３２側では、塗料注入部成
形空間４３の縁から突出する係合部成形空間４４が形成
されている。この係合部成形空間４４は、前記成形品１
０の係合部１５を成形する部分であり、塗料注入部成形
空間４３の厚みよりも薄くされている。The cavity 41 has a product part molding space 42 for molding the product part 13 of the molded product 10 shown in FIG.
And a paint injection part molding space 43 for molding the paint injection part 14.
Have and. The paint injection hole 23 of the upper mold 21 communicates with the paint injection part molding space 43, and the paint injection hole 23
On the side of the lower mold cavity surface 32 that faces the, the engaging portion molding space 44 that projects from the edge of the paint injection portion molding space 43 is formed. This engaging portion molding space 44 is the same as the molded product 1 described above.
It is a portion for molding the engaging portion 15 of 0, and is thinner than the thickness of the paint injection portion molding space 43.
【００１５】なお、前記塗料注入部成形空間４３付近の
上型キャビティ面２２と下型キャビティ面３２間の距離
は、図３に示すａ，ｂ，ｃ，ｄの符号を用いれば、ａ＝
ｂ≧ｃ＝ｄとするのが、後記する塗料注入時に塗料が製
品部成形空間４２側に流れ易くなるため好ましい。The distance between the upper mold cavity surface 22 and the lower mold cavity surface 32 in the vicinity of the paint injection portion molding space 43 is a = if the symbols a, b, c and d shown in FIG. 3 are used.
It is preferable that b ≧ c = d because the paint easily flows toward the product part molding space 42 at the time of injecting the paint, which will be described later.
【００１６】次に、前記金型２０を用いて行なうＲＩＭ
成形品のインモールドコート成形法について説明する。
まず、図２に示したＲＩＭ原料注入ノズル５２からＲＩ
Ｍ原料をキャビティ４１内に充填する。図４に示すよう
に、充填されたＲＩＭ原料１１ａは、キャビティ４１の
製品部成形空間４２、塗料注入部成形空間４３および係
合部成形空間４４を満たし、直ちに硬化してＲＩＭ成形
品１１を成形する。そのＲＩＭ成形品１１は、図５の拡
大断面図に示すように、製品部成形空間４２で製品部１
３が形成され、また塗料注入部成形空間４３で塗料注入
部１４が形成され、さらに係合部成形空間４４で係合部
１５が形成されて、その係合部１５が前記係合部成形空
間４４に嵌まって係合している。Next, RIM performed using the mold 20.
The in-mold coat molding method of the molded product will be described.
First, from the RIM raw material injection nozzle 52 shown in FIG.
The cavity 41 is filled with M raw material. As shown in FIG. 4, the filled RIM raw material 11 a fills the product part molding space 42, the paint injection part molding space 43 and the engaging part molding space 44 of the cavity 41 and immediately cures to mold the RIM molded product 11. To do. As shown in the enlarged cross-sectional view of FIG. 5, the RIM molded product 11 has the product part 1 in the product part molding space 42.
3 is formed, the paint injection part 14 is formed in the paint injection part molding space 43, the engagement part 15 is formed in the engagement part molding space 44, and the engagement part 15 is formed in the engagement part molding space. 44 is fitted and engaged.
【００１７】前記金型２０内で成形されたＲＩＭ成形品
１１は、硬化反応の進行により図６に示すように収縮す
る。その際、ＲＩＭ成形品１１は、成形品形状や上型２
１と下型３１の温度差等によって、図７に示すように、
上型２１のキャビティ面２２にＲＩＭ成形品１１が密着
したまま上型２１側へ収縮して、その上型キャビティ面
２２で開口する塗料注入孔２３を塞ぐ恐れがある。The RIM molded product 11 molded in the mold 20 shrinks as the curing reaction proceeds, as shown in FIG. At that time, the RIM molded product 11 has the molded product shape and the upper mold 2
As shown in FIG. 7, due to the temperature difference between 1 and the lower mold 31,
There is a risk that the RIM molded product 11 may contract to the cavity surface 22 of the upper die 21 while shrinking toward the upper die 21 side to close the paint injection hole 23 opened in the upper die cavity surface 22.
【００１８】しかし、前記ＲＩＭ成形品１１は、前記の
ように塗料注入孔２３と対向する下型キャビティ面３２
側で係合部１５が金型の係合部成形空間４４に嵌まって
係合している。そのため、ＲＩＭ成形品１１が上型２１
側へ収縮しようとすると、前記係合部１５が係合部成形
空間４４と係合して、てこのように作用し、ＲＩＭ成形
品１１が上型２１側へ収縮するのを阻止する。その結
果、図８に示すように、少なくとも塗料注入孔２３付近
で、ＲＩＭ成形品１１表面と上型２１キャビティ面２２
間に隙間４５を生じる。なお、前記隙間４５は、用いる
インモールドコート用塗料にもよるが、通常２０〜６０
μｍ程度が好ましい。However, the RIM molded product 11 has the lower mold cavity surface 32 facing the paint injection hole 23 as described above.
On the side, the engaging portion 15 is fitted and engaged with the engaging portion forming space 44 of the mold. Therefore, the RIM molded product 11 is the upper mold 21.
When it tries to contract to the side, the engaging part 15 engages with the engaging part forming space 44 and acts like a lever, and prevents the RIM molded product 11 from contracting to the upper die 21 side. As a result, as shown in FIG. 8, at least in the vicinity of the paint injection hole 23, the surface of the RIM molded product 11 and the upper mold 21 cavity surface 22
A gap 45 is created between them. The gap 45 is usually 20 to 60, although it depends on the in-mold coating material used.
About μm is preferable.
【００１９】次いで、図９に示すように、塗料注入孔２
３に挿入された塗料注入ノズル５１からインモールドコ
ート用塗料１２ａを、前記上型２１キャビティ面とＲＩ
Ｍ成形品１１表面間の隙間４５に注入する。その際、塗
料注入孔２３がＲＩＭ成形品１１表面によって塞がれて
ないため、インモールドコート用塗料１２ａの注入が妨
げられず、ＲＩＭ成形品１１表面がインモールドコート
用塗料１２ａで満遍なく覆われる。Next, as shown in FIG. 9, the paint injection hole 2
The in-mold coat paint 12a is applied from the paint injection nozzle 51 inserted in the nozzle 3 to the cavity surface of the upper mold 21 and RI.
It is injected into the gap 45 between the surfaces of the M molded product 11. At this time, since the paint injection hole 23 is not blocked by the surface of the RIM molded product 11, the injection of the in-mold coating paint 12a is not hindered, and the surface of the RIM molded product 11 is evenly covered with the in-mold coating paint 12a. .
【００２０】そして、前記インモールドコート用塗料１
２ａの硬化により、ＲＩＭ成形品１１表面に塗膜１２が
一体に形成される。その後、脱型により図１０に示した
成形品１０が得られる。この成形品１０は、前記ＲＩＭ
成形品１１の表面が塗膜１２で覆われ、しかもその塗膜
１２表面にピンホールのない外観良好なものである。Then, the in-mold coating composition 1
By curing 2a, the coating film 12 is integrally formed on the surface of the RIM molded product 11. Then, the molded product 10 shown in FIG. 10 is obtained by demolding. This molded product 10 is the same as the RIM
The surface of the molded article 11 is covered with the coating film 12, and there is no pinhole on the surface of the coating film 12, and the appearance is good.
【００２１】[0021]
【発明の効果】以上図示し説明したように、この発明の
成形方法によれば、ＲＩＭ成形後ＲＩＭ成形品の収縮に
よって生じる金型内の隙間を利用して塗料を注入するた
め、ＳＭＣのインモールドコート成形法のように、ＳＭ
Ｃ成形後に上型を上げ下げして上下型間に隙間を設けた
り、加圧したりする必要がなく、きわめて簡単な作業で
ＲＩＭ成形品表面にピンホールのない塗膜を形成するこ
とができる。しかも、前記ＲＩＭ成形品の収縮時に金型
の塗料注入孔が塞がれないため、塗料の型内への注入が
妨げられず、常に一定の品質の塗膜をＲＩＭ成形品表面
に形成することもできる。また、この発明の金型によれ
ば、前記成形方法を効率よく行なうことができる効果が
ある。As shown and described above, according to the molding method of the present invention, the paint is injected by utilizing the gap in the mold after the RIM molding due to the shrinkage of the RIM molded product. Like the mold coat molding method, SM
It is not necessary to raise and lower the upper mold after C molding to provide a gap between the upper and lower molds or pressurize, and a pinhole-free coating film can be formed on the surface of the RIM molded product by an extremely simple operation. Moreover, since the paint injection hole of the mold is not closed when the RIM molded product is contracted, the coating of the paint into the mold is not obstructed and a coating film of constant quality is always formed on the surface of the RIM molded product. You can also Further, according to the mold of the present invention, there is an effect that the molding method can be efficiently performed.
【図１】この発明の金型の一実施例を示す断面図であ
る。FIG. 1 is a sectional view showing an embodiment of a mold of the present invention.
【図２】その２−２断面図である。FIG. 2 is a 2-2 sectional view thereof.
【図３】図１の要部拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a main part of FIG.
【図４】この発明の成形法におけるＲＩＭ原料充填時を
示す断面図である。FIG. 4 is a cross-sectional view showing filling of a RIM raw material in the molding method of the present invention.
【図５】その要部拡大断面図である。FIG. 5 is an enlarged cross-sectional view of the relevant part.
【図６】その収縮状態を示す断面図である。FIG. 6 is a cross-sectional view showing the contracted state.
【図７】その収縮時の作用を示す断面図である。FIG. 7 is a cross-sectional view showing the action at the time of contraction.
【図８】収縮後を示す断面図である。FIG. 8 is a cross-sectional view showing after contraction.
【図９】塗料注入状態を示す断面図である。FIG. 9 is a cross-sectional view showing a paint injection state.
【図１０】この発明の実施により成形された成形品の斜
視図である。FIG. 10 is a perspective view of a molded product molded by carrying out the present invention.
１１ ＲＩＭ成形品 １２ 塗膜 １３ 製品部 １４ 塗料注入部 １５ 係合部 ２０ 金型 ２１ 上型 ２２ 上型キャビティ面 ２３ 塗料注入孔 ３１ 下型 ３２ 下型キャビティ面 ４１ キャビティ ４４ 係合部成形空間 １２ａ塗料 11 RIM molded products 12 coating 13 Product Department 14 Paint injection section 15 Engagement part 20 mold 21 Upper mold 22 Upper mold cavity surface 23 Paint injection hole 31 Lower mold 32 Lower mold cavity surface 41 cavity 44 Engaging part molding space 12a paint
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/00 - 45/84 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B29C 45/00-45/84
Claims (2)
してＲＩＭ成形品を成形した後、前記金型内でのＲＩＭ
成形品の収縮により生じるＲＩＭ成形品表面とキャビテ
ィ面間の隙間に、前記金型の塗料注入孔から塗料を注入
して、前記ＲＩＭ成形品表面に塗膜を形成するに際し、 前記金型には塗料注入孔をキャビティ面に開口して設け
るとともに、該塗料注入孔と対向するキャビティ面側で
はキャビティの縁に外方へ突出する係合部成形空間を設
け、 前記係合部成形空間を含むキャビティにＲＩＭ原料を充
填して、前記係合部成形空間と係合したＲＩＭ成形品を
成形し、前記ＲＩＭ成形品の収縮時に該ＲＩＭ成形品と
前記係合部成形空間との係合により、前記塗料注入孔側
のキャビティ面に当接したままＲＩＭ成形品が収縮して
塗料注入孔を塞ぐのを阻止することを特徴するＲＩＭ成
形品のインモールドコート成形法。1. A RIM raw material is filled in a cavity in a mold to form a RIM molded product, and then RIM in the mold is performed.
When a paint is injected into the gap between the surface of the RIM molded product and the cavity surface caused by the shrinkage of the molded product through the paint injection hole of the mold to form a coating film on the surface of the RIM molded product, A paint injection hole is provided in the cavity surface, and an engaging portion molding space that projects outward is provided at the edge of the cavity on the side of the cavity surface facing the paint injection hole. Is filled with RIM raw material to form a RIM molded product that is engaged with the engaging portion molding space, and when the RIM molded product contracts, the RIM molded product and the engaging portion molding space are An in-mold coat molding method for an RIM molded product, characterized in that the RIM molded product is prevented from contracting and blocking the paint injection hole while being in contact with the cavity surface on the paint injection hole side.
してＲＩＭ成形品を成形した後、前記金型内でのＲＩＭ
成形品の収縮により生じるＲＩＭ成形品表面とキャビテ
ィ面間の隙間に、前記金型に設けた塗料注入孔から塗料
を注入することにより、前記ＲＩＭ成形品表面に塗膜を
形成するための金型であって、 前記塗料注入孔をキャビティ面に開口して設けるととも
に、該塗料注入孔と対向するキャビティ面側ではキャビ
ティの縁に外方へ突出する係合部成形空間を設けたこと
を特徴とするＲＩＭ成形品のインモールドコート成形用
金型。2. A RIM raw material is filled in a cavity in a mold to form a RIM molded product, and then RIM in the mold is performed.
A mold for forming a coating film on the surface of the RIM molded product by injecting a paint into the gap between the surface of the RIM molded product and the cavity surface caused by shrinkage of the molded product, through a paint injection hole provided in the mold. In addition, the paint injection hole is provided so as to open in the cavity surface, and an engagement portion molding space that projects outward is provided at the edge of the cavity on the side of the cavity surface facing the paint injection hole. Mold for in-mold coat molding of RIM molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21784694A JP3501853B2 (en) | 1994-08-19 | 1994-08-19 | In-mold coat molding method of RIM molded article and its mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21784694A JP3501853B2 (en) | 1994-08-19 | 1994-08-19 | In-mold coat molding method of RIM molded article and its mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0857889A JPH0857889A (en) | 1996-03-05 |
| JP3501853B2 true JP3501853B2 (en) | 2004-03-02 |
Family
ID=16710685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21784694A Expired - Fee Related JP3501853B2 (en) | 1994-08-19 | 1994-08-19 | In-mold coat molding method of RIM molded article and its mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3501853B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4890168B2 (en) * | 2006-09-14 | 2012-03-07 | 日本プラスト株式会社 | Mold for RIM molding of resin molded product and RIM molding method |
| JP5004125B2 (en) * | 2007-08-09 | 2012-08-22 | ダイキョーニシカワ株式会社 | Mold for resin molding |
-
1994
- 1994-08-19 JP JP21784694A patent/JP3501853B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0857889A (en) | 1996-03-05 |
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