JP6871017B2 - Manufacturing method of multicolor molded products - Google Patents

Manufacturing method of multicolor molded products Download PDF

Info

Publication number
JP6871017B2
JP6871017B2 JP2017035489A JP2017035489A JP6871017B2 JP 6871017 B2 JP6871017 B2 JP 6871017B2 JP 2017035489 A JP2017035489 A JP 2017035489A JP 2017035489 A JP2017035489 A JP 2017035489A JP 6871017 B2 JP6871017 B2 JP 6871017B2
Authority
JP
Japan
Prior art keywords
partition plate
different materials
molded product
boundary
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.)
Active
Application number
JP2017035489A
Other languages
Japanese (ja)
Other versions
JP2018140537A (en
Inventor
貴博 山木
貴博 山木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishikawa Rubber Co Ltd
Original Assignee
Nishikawa Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nishikawa Rubber Co Ltd filed Critical Nishikawa Rubber Co Ltd
Priority to JP2017035489A priority Critical patent/JP6871017B2/en
Publication of JP2018140537A publication Critical patent/JP2018140537A/en
Application granted granted Critical
Publication of JP6871017B2 publication Critical patent/JP6871017B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

本発明は、複数の異なる材料同士を組み合わせて一体に成形した多色成形品の製造方法に関する。 The present invention relates to a method for producing a multicolor molded product in which a plurality of different materials are combined and integrally molded.

多色成形品とは、一般的に複数種類または複数色の樹脂材料を、同時にまたは順次射出成形することにより得られる成形品である。ただし、ここでは、同種類または同色の材料でも、複数の射出ユニットにより同時にまたは順次射出成形することで得られる成形品ならば多色成形品と定義する。また、以上の定義より、多色成形とは、複数の射出ユニットを用いて、材料を同時にまたは順次射出成形する成形方法であるとする。 The multicolor molded product is generally a molded product obtained by injection molding a plurality of types or a plurality of colors of resin materials at the same time or sequentially. However, here, even if the materials are of the same type or color, if they are molded products obtained by injection molding simultaneously or sequentially by a plurality of injection units, they are defined as multicolor molded products. Further, from the above definition, multicolor molding is defined as a molding method in which materials are injection-molded simultaneously or sequentially using a plurality of injection units.

さて、多色成形品の製造方法として、（１）多色成形機による製造方法、（２）複数の射出成形機間の成形品移動による製造方法が知られている。上記（１）の方法には、複数の射出ユニットを持つ射出成形機を用いて、一つの金型に複数種類の材料を同時に射出する方法と、複数の射出ユニットと金型を回転させる機構とを備えた射出成形機を用いて、金型を切り替えながら複数種類の材料を順次射出成形していく方法とがある。上記（２）の方法は、第一の射出成形機で射出成形した一次成形品を、次の順番の射出成形機の金型の所定の位置にセットして、該射出成形機で射出成形し、得られた成形品を更に次の順番の射出成形機の金型にセットして射出成形を行うという工程を繰り返すことで、多色成形を行う方法である。 As a method for manufacturing a multicolor molded product, (1) a manufacturing method using a multicolor molding machine and (2) a manufacturing method by moving a molded product between a plurality of injection molding machines are known. The method (1) described above includes a method of simultaneously injecting a plurality of types of materials into one mold using an injection molding machine having a plurality of injection units, and a mechanism for rotating the plurality of injection units and the mold. There is a method in which a plurality of types of materials are sequentially injection-molded while switching dies using an injection molding machine equipped with the above. In the method (2) above, the primary molded product injection-molded by the first injection molding machine is set at a predetermined position of the mold of the injection molding machine in the next order, and injection-molded by the injection molding machine. This is a method of performing multicolor molding by repeating the process of setting the obtained molded product in the mold of the injection molding machine in the next order and performing injection molding.

特許文献１には、樹脂芯材の表面の一部を表皮材により被覆一体化した二色成形体を精度良く成形できる積層成形体の成形方法が開示されている。この成形方法においては、モールドプレス成形用下型には、各ゲートから供給される半溶融樹脂を区画する仕切りプレートが設置されている。 Patent Document 1 discloses a method for molding a laminated molded product capable of accurately molding a two-color molded product in which a part of the surface of a resin core material is coated and integrated with a skin material. In this molding method, a partition plate for partitioning the semi-molten resin supplied from each gate is installed in the lower mold for mold press molding.

また、特許文献２には、二色成形品であるエアバック用自動車内装品の製造方法が開示されている。この製造方法では、一方の注入用プランジャの注入孔から硬質熱可塑性樹脂材を成形樹脂注入ゲートに供給するとともに、他方の注入用プランジャの注入孔から樹脂注入ゲート内に軟質熱可塑性樹脂材を供給している。 Further, Patent Document 2 discloses a method for manufacturing an automobile interior product for an airbag, which is a two-color molded product. In this manufacturing method, a hard thermoplastic resin material is supplied to the molded resin injection gate from the injection hole of one injection plunger, and a soft thermoplastic resin material is supplied into the resin injection gate from the injection hole of the other injection plunger. doing.

特開平８−２６７４７９号公報（１９９６年１０月１５日公開）Japanese Unexamined Patent Publication No. 8-267479 (published on October 15, 1996) 特開２００１−９７１６３号公報（２００１年４月１０日公開）Japanese Unexamined Patent Publication No. 2001-97163 (published on April 10, 2001)

しかしながら、上記特許文献１に記載の成形方法では、仕切りプレートを用いることで異なる材料の境界部分が滑らかに接続する構造になるものの、異なる材料を二回の工程に分けて射出成形しているため、成形工数が増加してしまうという問題点がある。 However, in the molding method described in Patent Document 1, although the boundary portion of different materials is smoothly connected by using the partition plate, the different materials are injection-molded in two steps. , There is a problem that the molding man-hours increase.

一方、上記特許文献２に記載の製造方法では、異なる材料を１回の工程で射出成形しているため、成形工数を低減できるものの、上記特許文献１に記載の成形方法のように、異なる材料の境界部分を滑らかに接続させる観点については配慮されていないという問題点がある。 On the other hand, in the manufacturing method described in Patent Document 2, different materials are injection-molded in one step, so that the molding man-hours can be reduced, but different materials are used as in the molding method described in Patent Document 1. There is a problem that consideration is not given to the viewpoint of smoothly connecting the boundary portions of the above.

本発明は以上の問題点に鑑みて為されたものであり、その目的は、成形工数を低減させるとともに、異なる材料の境界部分を滑らかに接続させることができる多色成形品の製造方法を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for manufacturing a multicolor molded product capable of reducing molding man-hours and smoothly connecting boundary portions of different materials. To do.

上記の課題を解決するために、本発明の一態様に係る多色成形品の製造方法は、複数の異なる材料同士を組み合わせて一体に成形した多色成形品の製造方法であって、上記複数の異なる材料の境界を仕切るための仕切り板を挟んで、上記複数の異なる材料のそれぞれを上記仕切り板が存在する方向に射出する射出工程と、上記複数の異なる材料のそれぞれを射出した後、上記複数の異なる材料のそれぞれに発泡または加硫が起きている期間のいずれかの時点に、上記仕切り板を上記境界から抜いて上記境界を開放する仕切り板抜去工程と、を含むことを特徴としている。 In order to solve the above problems, the method for producing a multicolor molded product according to one aspect of the present invention is a method for producing a multicolor molded product in which a plurality of different materials are combined and integrally molded. An injection step of injecting each of the plurality of different materials in the direction in which the partition plate is present, sandwiching a partition plate for partitioning the boundary between the different materials, and an injection step of injecting each of the plurality of different materials, and then the above. It is characterized by including a partition plate removing step of pulling out the partition plate from the boundary to open the boundary at any time during a period in which foaming or vulcanization occurs in each of the plurality of different materials. ..

上記方法によれば、射出工程で、複数の異なる材料の境界を仕切るための仕切り板を挟んで、複数の異なる材料のそれぞれを仕切り板が存在する方向に射出する。このため、一回の工程で、複数の異なる材料のそれぞれを射出することができる。これにより、複数の異なる材料のそれぞれを複数回の工程に分けて射出成形する方法と比較して成形工数を低減させることができる。また、上記方法によれば、仕切り板抜去工程で、複数の異なる材料のそれぞれを射出した後、複数の異なる材料のそれぞれに発泡または加硫が起きている期間のいずれかの時点に、仕切り板を境界から抜いて境界を開放する。このため、複数の異なる材料を同時並列的に成形し、複数の異なる材料の境界部分を馴染ませることにより、異なる材料の境界部分を滑らかに接続させることができる。以上により、上記の方法によれば、成形工数を低減させるとともに、異なる材料の境界部分を滑らかに接続させることができる。 According to the above method, in the injection step, each of the plurality of different materials is injected in the direction in which the partition plate exists, with the partition plate for partitioning the boundary of the plurality of different materials sandwiched. Therefore, each of a plurality of different materials can be injected in one step. As a result, the molding man-hours can be reduced as compared with the method of injection molding each of a plurality of different materials in a plurality of steps. Further, according to the above method, in the partition plate removing step, after injecting each of a plurality of different materials, the partition plate is formed at any time during the period in which foaming or vulcanization is occurring in each of the plurality of different materials. To open the boundary by pulling out from the boundary. Therefore, by molding a plurality of different materials in parallel at the same time and blending the boundary portions of the plurality of different materials, the boundary portions of the different materials can be smoothly connected. As described above, according to the above method, it is possible to reduce the molding man-hours and smoothly connect the boundary portions of different materials.

本発明の一態様に係る多色成形品の製造方法は、上記複数の異なる材料が二種類の異なる材料であっても良い。上記方法によれば、異なる材料の境界部分が滑らかに接続した二色成形品を製造することができる。 In the method for producing a multicolor molded article according to one aspect of the present invention, the plurality of different materials may be two different materials. According to the above method, it is possible to produce a two-color molded product in which the boundary portions of different materials are smoothly connected.

本発明の一態様に係る多色成形品の製造方法は、上記仕切り板における上記境界の延伸方向に沿って延伸する２つの側面のそれぞれのテーパ角度が、０度を超え、かつ１度以下であることが好ましい。上記方法によれば、仕切り板をスムーズに動かすことができる。 In the method for producing a multicolor molded product according to one aspect of the present invention, the taper angle of each of the two side surfaces extending along the extending direction of the boundary in the partition plate exceeds 0 degrees and is 1 degree or less. It is preferable to have. According to the above method, the partition plate can be moved smoothly.

本発明の一態様に係る多色成形品の製造方法は、上記仕切り板を下降させたときに、上記仕切り板における上記境界の延伸方向に沿って延伸する２つの側面の一方と、上記複数の異なる材料のうち上記側面の一方に近接する材料と、の間にできる上記射出の方向に沿う隙間の幅が、０ｍｍを超え、かつ０．０５ｍｍ以下となることが好ましい。上記方法によれば、隙間に材料が入って根詰まりすることを回避することで連続射出を可能にすることができる。 In the method for producing a multicolor molded article according to one aspect of the present invention, when the partition plate is lowered, one of the two side surfaces extending along the stretching direction of the boundary in the partition plate and the plurality of the above-mentioned plurality of side surfaces. It is preferable that the width of the gap formed between the different materials and the material adjacent to one of the side surfaces along the injection direction is more than 0 mm and 0.05 mm or less. According to the above method, continuous injection can be enabled by preventing the material from entering the gap and clogging the root.

本発明の一態様に係る多色成形品の製造方法によれば、成形工数を低減させるとともに、異なる材料の境界部分を滑らかに接続させることができるという効果を奏する。 According to the method for producing a multicolor molded product according to one aspect of the present invention, it is possible to reduce the molding man-hours and smoothly connect the boundary portions of different materials.

本発明の一実施形態に係る成形機の構造を示す斜視図である。It is a perspective view which shows the structure of the molding machine which concerns on one Embodiment of this invention. 上記成形機の縦断面の構造を示す縦断面図である。It is a vertical cross-sectional view which shows the structure of the vertical cross-section of the said molding machine. （ａ）は、複数の材料を仕切り板の存在する方向に射出したときの二色成形品の状態を示す斜視図であり、（ｂ）は、上記二色成形品の断面図であり、（ｃ）は、仕切り板を下降させたときの二色成形品の状態を示す斜視図であり、（ｄ）は、仕切り板の側面のテーパ角度について説明するための図であり、（ｅ）は、仕切り板の側面と、その側面に近接する材料との間にできる隙間の幅について説明するための図である。(A) is a perspective view showing a state of a two-color molded product when a plurality of materials are injected in a direction in which a partition plate exists, and (b) is a cross-sectional view of the two-color molded product. c) is a perspective view showing a state of a two-color molded product when the partition plate is lowered, (d) is a view for explaining the taper angle of the side surface of the partition plate, and (e) is a view for explaining. , It is a figure for demonstrating the width of the gap formed between the side surface of a partition plate, and the material which is close to the side surface. （ａ）は、本発明の一実施形態に係る二色成形品の構造の一例を示す図であり、（ｂ）は、上記二色成形品の断面の構造を示す断面図である。(A) is a figure which shows an example of the structure of the two-color molded article which concerns on one Embodiment of this invention, and (b) is a sectional view which shows the cross-sectional structure of the said two-color molded article.

本発明の実施の形態について図１〜図４に基づいて説明すれば、次の通りである。以下、説明の便宜上、ある項目にて説明した構成と同一の機能を有する構成については、他の項目においても同一の符号を付記し、その説明を省略する場合がある。 An embodiment of the present invention will be described as follows with reference to FIGS. 1 to 4. Hereinafter, for convenience of explanation, the same reference numerals may be added to other items for configurations having the same functions as those described in one item, and the description thereof may be omitted.

〔成形機の構造〕
図１は、本発明の一実施形態に係る成形機１００の構造を示す斜視図である。また、図２は、成形機１００の縦断面の構造を示す縦断面図である。これらの図に示すように成形機１００は、上側金型１、下側金型２、仕切り板３、ポット４、プランジャ５、油圧シリンダ６、ノズル７、およびノズル８を備える。 [Structure of molding machine]
FIG. 1 is a perspective view showing the structure of a molding machine 100 according to an embodiment of the present invention. Further, FIG. 2 is a vertical cross-sectional view showing the structure of the vertical cross section of the molding machine 100. As shown in these figures, the molding machine 100 includes an upper mold 1, a lower mold 2, a partition plate 3, a pot 4, a plunger 5, a hydraulic cylinder 6, a nozzle 7, and a nozzle 8.

上側金型１の下面には、成形機１００にて製造される二色成形品（多色成形品）１１の略上半分を形成するための型が彫り込まれている。また、下側金型２の上面には、二色成形品１１の略下半分を形成するための型が彫り込まれている。 A mold for forming substantially the upper half of the two-color molded product (multicolor molded product) 11 manufactured by the molding machine 100 is engraved on the lower surface of the upper mold 1. Further, a mold for forming a substantially lower half of the two-color molded product 11 is engraved on the upper surface of the lower mold 2.

上側金型１の下面と、下側金型２の上面とを接合させ、後述するノズル７から材料ｍ１を金型内で射出するとともにノズル８から材料ｍ２を金型内で射出することにより、材料ｍ１および材料ｍ２の境界が仕切り板３で仕切られた状態の成形途中の二色成形品１１が形成される。二色成形品１１は、複数の異なる材料である材料ｍ１および材料ｍ２同士を組み合わせて一体に成形される成形品である。上側金型１の上方には、注入口１０が形成されており、この注入口１０を通して材料ｍ１が注入される。 By joining the lower surface of the upper mold 1 and the upper surface of the lower mold 2, the material m1 is ejected from the nozzle 7 described later in the mold, and the material m2 is ejected from the nozzle 8 into the mold. A two-color molded product 11 in the middle of molding is formed in a state where the boundary between the material m1 and the material m2 is partitioned by the partition plate 3. The two-color molded product 11 is a molded product that is integrally molded by combining a plurality of different materials, the material m1 and the material m2. An injection port 10 is formed above the upper mold 1, and the material m1 is injected through the injection port 10.

材料ｍ１と材料ｍ２との組合せの例としては、ソリッド状の成形材料とスポンジ状の成形材料との組合せ、および、硬質性の成形材料と軟質性の成形材料（例えば、オレフィン系のエラストマー）との組合せなどを例示することができる。 Examples of combinations of the material m1 and the material m2 include a combination of a solid molding material and a sponge-like molding material, and a rigid molding material and a soft molding material (for example, an olefin-based elastomer). The combination of the above can be exemplified.

本実施形態では、複数の異なる材料が二種類の異なる材料ｍ１および材料ｍ２である二色成形品１１の成形方法について説明するが、本発明を適用可能な方法はこれに限定されず、例えば、３つ以上の異なる材料を組合せて一体に成形される多色成形品の成形方法にも本発明を適用することができる。 In the present embodiment, a method for molding a two-color molded product 11 in which a plurality of different materials are two different materials m1 and a material m2 will be described, but the method to which the present invention can be applied is not limited to this, for example. The present invention can also be applied to a method for molding a multicolor molded product that is integrally molded by combining three or more different materials.

上側金型１と下側金型２との接合部の手前側には、開口部ｈが形成されており、この開口部ｈを通して二色成形品１１が取り出されるようになっている。また、下側金型２の手前側の側面における開口部ｈの下部に形成された孔からは、仕切り板３を下降させるための取っ手３ａが突出している。 An opening h is formed on the front side of the joint between the upper mold 1 and the lower mold 2, and the two-color molded product 11 is taken out through the opening h. Further, a handle 3a for lowering the partition plate 3 projects from a hole formed in the lower part of the opening h on the front side surface of the lower mold 2.

仕切り板３は、複数の異なる材料ｍ１および材料ｍ２の境界を仕切るための板状部材である。ポット４は、中心軸上の点を中心とする円形状の孔が中心軸に沿って延伸して形成された略円筒形状の部材であり、ポット４の一端は、ノズル８に接続されており、ノズル８の一端は、ポット４の孔に連結している。ポット４の孔に材料ｍ２を入れてプランジャ５で押し込むことにより、ノズル８の射出部から材料ｍ２が射出するようになっている。プランジャ５は、油圧シリンダ６の押圧によりポット４の孔に押し込まれるようになっている。一方、ノズル７の射出部からは、材料ｍ１が射出される。 The partition plate 3 is a plate-shaped member for partitioning the boundary between a plurality of different materials m1 and material m2. The pot 4 is a substantially cylindrical member formed by extending a circular hole centered on a point on the central axis along the central axis, and one end of the pot 4 is connected to a nozzle 8. , One end of the nozzle 8 is connected to the hole of the pot 4. By inserting the material m2 into the hole of the pot 4 and pushing it with the plunger 5, the material m2 is ejected from the injection portion of the nozzle 8. The plunger 5 is pushed into the hole of the pot 4 by the pressing of the hydraulic cylinder 6. On the other hand, the material m1 is ejected from the injection portion of the nozzle 7.

〔二色成形品の製造方法〕
上述した成形機１００を用いた本実施形態の二色成形品１１の製造方法は、少なくとも以下の（１）および（２）に示す工程を含む。
（１）材料ｍ１および材料ｍ２の境界を仕切るための仕切り板３を挟んで、材料ｍ１および材料ｍ２のそれぞれを仕切り板３が存在する方向に射出する射出工程。
（２）材料ｍ１および材料ｍ２のそれぞれを射出した後、材料ｍ１および材料ｍ２のそれぞれに発泡または加硫が起きている期間のいずれかの時点（例えば、射出開始から３０秒後）に、仕切り板３を上記境界から抜いて上記境界を開放する（より具体的には、仕切り板３を下降させる）仕切り板抜去工程。 [Manufacturing method of two-color molded products]
The method for producing the two-color molded product 11 of the present embodiment using the molding machine 100 described above includes at least the steps shown in (1) and (2) below.
(1) An injection step of injecting each of the material m1 and the material m2 in the direction in which the partition plate 3 exists, sandwiching the partition plate 3 for partitioning the boundary between the material m1 and the material m2.
(2) After injecting each of the material m1 and the material m2, at any time during the period in which foaming or vulcanization occurs in each of the material m1 and the material m2 (for example, 30 seconds after the start of injection), the partition A partition plate removing step in which the plate 3 is pulled out from the boundary to open the boundary (more specifically, the partition plate 3 is lowered).

上述した成形機１００においてノズル７およびノズル８の２つのノズルを金型内に内蔵させることで、上記（１）の射出工程により、一回の工程で、材料ｍ１および材料ｍ２のそれぞれを射出することができる。これにより、材料ｍ１および材料ｍ２のそれぞれを二回の工程に分けて射出成形する方法と比較して成形工数を低減させることができる。 By incorporating the two nozzles of the nozzle 7 and the nozzle 8 in the mold in the molding machine 100 described above, the material m1 and the material m2 are respectively injected in one step by the injection step of the above (1). be able to. As a result, the molding man-hours can be reduced as compared with the method of injection molding each of the material m1 and the material m2 in two steps.

また、上記（２）の仕切り板抜去工程により、材料ｍ１および材料ｍ２を同時並列的に成形し、材料ｍ１および材料ｍ２の境界部分を馴染ませることにより、材料ｍ１および材料ｍ２の境界部分が滑らかに接続する二色成形品１１を製造することができる。以上により、上記の方法によれば、一回の工程で材料ｍ１および材料ｍ２の同時成形を実現することで成形工数を低減させるとともに、材料ｍ１および材料ｍ２の境界部分を隙間無く滑らかに接続させることができる。 Further, by the partition plate removing step of the above (2), the material m1 and the material m2 are molded in parallel at the same time, and the boundary portion between the material m1 and the material m2 is blended so that the boundary portion between the material m1 and the material m2 is smooth. The two-color molded product 11 connected to the above can be manufactured. As described above, according to the above method, the molding man-hours are reduced by realizing simultaneous molding of the material m1 and the material m2 in one step, and the boundary portion between the material m1 and the material m2 is smoothly connected without a gap. be able to.

また、上記方法によれば、使用する成形機１００が一台で済み、通常の成形時間である１８０秒内で材料ｍ１および材料ｍ２の同時成型が可能になる。これにより、材料ｍ１および材料ｍ２のそれぞれを二回の工程に分けて射出成形する方法と比較して総成形時間を半減させることができる。また、従来の二回の工程に分けて射出成形する方法では、２台の成形機または専用機が必要となり、追加の設備投資が必要であるという問題点があるが、上記方法によれば、このような問題点は生じない。 Further, according to the above method, only one molding machine 100 is used, and the material m1 and the material m2 can be simultaneously molded within 180 seconds, which is a normal molding time. As a result, the total molding time can be halved as compared with the method of injection molding each of the material m1 and the material m2 in two steps. Further, the conventional method of injection molding by dividing into two steps has a problem that two molding machines or dedicated machines are required and additional capital investment is required. However, according to the above method, Such a problem does not occur.

〔成形途中の二色成形品の状態について〕
次に、図３に基づき、成形途中の二色成形品１１の状態について説明する。図３の（ａ）は、材料ｍ１および材料ｍ２のそれぞれを仕切り板３の存在する方向に射出したときの二色成形品１１の状態を示す斜視図である。また、図３の（ｂ）は、図３の（ａ）に示す状態の二色成形品１１の断面図である。 [About the state of the two-color molded product during molding]
Next, the state of the two-color molded product 11 during molding will be described with reference to FIG. FIG. 3A is a perspective view showing a state of the two-color molded product 11 when each of the material m1 and the material m2 is injected in the direction in which the partition plate 3 exists. Further, FIG. 3B is a cross-sectional view of the two-color molded product 11 in the state shown in FIG. 3A.

図３の（ｂ）は、材料ｍ１および材料ｍ２の境界を仕切るための仕切り板３を挟んで、材料ｍ１および材料ｍ２のそれぞれを仕切り板３が存在する方向に射出したときの二色成形品１１の状態を示している。 FIG. 3B shows a two-color molded product when each of the material m1 and the material m2 is injected in the direction in which the partition plate 3 is present, sandwiching the partition plate 3 for partitioning the boundary between the material m1 and the material m2. It shows 11 states.

図３の（ｃ）は、仕切り板３を下降させたときの二色成形品１１の状態を示す斜視図である。図３の（ｃ）は、上述した射出工程で、材料ｍ１および材料ｍ２のそれぞれを射出した後、材料ｍ１および材料ｍ２のそれぞれに発泡または加硫が起きている期間のいずれかの時点に、仕切り板３を下降させたときの状態を示している。 FIG. 3C is a perspective view showing a state of the two-color molded product 11 when the partition plate 3 is lowered. FIG. 3C shows the injection step described above at any time during the period during which foaming or vulcanization occurs in each of the material m1 and the material m2 after the injection of the material m1 and the material m2. The state when the partition plate 3 is lowered is shown.

次に、図３の（ｄ）に基づき、仕切り板３の側面のテーパ角度について説明する。同図に示すように、仕切り板３における境界ＢＤの延伸方向に沿って延伸する２つの側面ＳＵＦ１および側面ＳＵＦ２のそれぞれのテーパ角度θは、０度を超え、かつ１度以下であることが好ましい。この条件を満たせば、仕切り板３を下降させる際に、スムーズに動かすことができる。 Next, the taper angle of the side surface of the partition plate 3 will be described based on (d) of FIG. As shown in the figure, the taper angles θ of the two side surface SUF1 and the side surface SUF2 extending along the extending direction of the boundary BD in the partition plate 3 are preferably more than 0 degrees and not more than 1 degree. .. If this condition is satisfied, the partition plate 3 can be smoothly moved when lowered.

次に、図３の（ｅ）に基づき、仕切り板３の側面と、その側面に近接する材料との間にできる隙間の幅について説明する。同図に示すように、仕切り板３を下降させたときに、仕切り板３における境界ＢＤの延伸方向に沿って延伸する側面ＳＵＦ１と、側面ＳＵＦ１に近接する材料ｍ２と、の間にできる射出方向に沿う隙間の幅ｄは、０ｍｍを超え、かつ０．０５ｍｍ以下となることが好ましい。また、同様に、仕切り板３を下降させたときに、仕切り板３における境界ＢＤの延伸方向に沿って延伸する側面ＳＵＦ２と、側面ＳＵＦ２に近接する材料ｍ１と、の間にできる射出方向に沿う隙間の幅ｄは、０ｍｍを超え、かつ０．０５ｍｍ以下となることが好ましい。以上の条件を満たせば、隙間に材料が入って根詰まりすることを回避することで連続射出を可能にすることができる。 Next, based on (e) of FIG. 3, the width of the gap formed between the side surface of the partition plate 3 and the material adjacent to the side surface will be described. As shown in the figure, when the partition plate 3 is lowered, the injection direction formed between the side surface SUF1 extending along the extending direction of the boundary BD in the partition plate 3 and the material m2 adjacent to the side surface SUF1. The width d of the gap along the above is preferably more than 0 mm and not more than 0.05 mm. Similarly, when the partition plate 3 is lowered, it follows the injection direction formed between the side surface SUF2 that extends along the stretching direction of the boundary BD in the partition plate 3 and the material m1 that is close to the side surface SUF2. The width d of the gap preferably exceeds 0 mm and is 0.05 mm or less. If the above conditions are satisfied, continuous injection can be enabled by preventing the material from entering the gap and clogging the root.

〔二色成形品の構造について〕
次に、図４に基づき、上述した方法にて製造した二色成形品１１の構造について説明する。図４の（ａ）は、上述した方法にて製造した二色成形品１１の構造の一例を示す図である。一方、図４の（ｂ）は、図４の（ａ）に示す二色成形品１１を上下方向に切断したときの断面図である。 [About the structure of two-color molded products]
Next, the structure of the two-color molded product 11 manufactured by the above-mentioned method will be described with reference to FIG. FIG. 4A is a diagram showing an example of the structure of the two-color molded product 11 manufactured by the above-mentioned method. On the other hand, FIG. 4B is a cross-sectional view of the two-color molded product 11 shown in FIG. 4A when the two-color molded product 11 is cut in the vertical direction.

図４の（ａ）に示すように、二色成形品１１の材料ｍ１と材料ｍ２との境界部分である接合部Ｊ１は、仕切り板３の開放によって形成された部分であり、境界部分が隙間無く滑らかに接続する構造となる。また、上述した方法にて製造した二色成形品１１では、図４の（ｂ）に示すように、その断面においても、材料ｍ１と材料ｍ２との境界面（接合部Ｊ１）の位置が明確に特定できる構造となる。 As shown in FIG. 4A, the joint portion J1 which is the boundary portion between the material m1 and the material m2 of the two-color molded product 11 is a portion formed by opening the partition plate 3, and the boundary portion is a gap. It has a structure that connects smoothly without any problems. Further, in the two-color molded product 11 manufactured by the above-mentioned method, as shown in FIG. 4B, the position of the boundary surface (joint portion J1) between the material m1 and the material m2 is clear even in the cross section thereof. It becomes a structure that can be specified in.

なお、接合部Ｊ２および接合部Ｊ３のそれぞれは、図１に示す上側金型１および下側金型２の手前側および裏側の側面における内壁で仕切られることによって必然的にできる境界部分であり、上述した仕切り板３の開放によって形成される境界部分とは異なる。 It should be noted that each of the joint portion J2 and the joint portion J3 is a boundary portion that is inevitably formed by being partitioned by inner walls on the front side and the back side side surfaces of the upper mold 1 and the lower mold 2 shown in FIG. It is different from the boundary portion formed by opening the partition plate 3 described above.

〔付記事項〕
本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。さらに、各実施形態にそれぞれ開示された技術的手段を組み合わせることにより、新しい技術的特徴を形成することができる。 [Additional notes]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

３ 仕切り板 ３ａ １１ 二色成形品（多色成形品）
ＢＤ 境界 θ テーパ角度 ｄ 幅 ｍ１ 材料 ｍ２ 材料
ＳＵＦ１ 側面 ＳＵＦ２ 側面 3 Partition plate 3a 11 Two-color molded product (multi-color molded product)
BD Boundary θ Taper Angle d Width m1 Material m2 Material SUF1 Side SUF2 Side

Claims (2)

複数の異なる材料同士を組み合わせて一体に成形した多色成形品の製造方法であって、
上記複数の異なる材料の境界を仕切るための仕切り板を挟んで、上記複数の異なる材料のそれぞれを上記仕切り板が存在する方向に射出する射出工程と、
上記複数の異なる材料のそれぞれを射出した後、上記複数の異なる材料のそれぞれに発泡または加硫が起きている期間のいずれかの時点に、上記仕切り板を上記境界から抜いて上記境界を開放する仕切り板抜去工程と、を含み、
上記仕切り板における上記境界の延伸方向に沿って延伸する２つの側面のそれぞれのテーパ角度が、０度を超え、かつ１度以下であることを特徴とする製造方法。 It is a manufacturing method of a multicolor molded product that is integrally molded by combining a plurality of different materials.
An injection step of injecting each of the plurality of different materials in the direction in which the partition plate exists, sandwiching a partition plate for partitioning the boundary between the plurality of different materials.
After injecting each of the plurality of different materials, at any time during the period during which foaming or vulcanization occurs in each of the plurality of different materials, the partition plate is pulled out from the boundary to open the boundary. and the partition plate removal process, only including,
A manufacturing method, wherein the taper angle of each of the two side surfaces extending along the extending direction of the boundary of the partition plate exceeds 0 degrees and is 1 degree or less. 上記複数の異なる材料が二種類の異なる材料であることを特徴とする請求項１に記載の製造方法。 The manufacturing method according to claim 1, wherein the plurality of different materials are two kinds of different materials.
JP2017035489A 2017-02-27 2017-02-27 Manufacturing method of multicolor molded products Active JP6871017B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017035489A JP6871017B2 (en) 2017-02-27 2017-02-27 Manufacturing method of multicolor molded products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017035489A JP6871017B2 (en) 2017-02-27 2017-02-27 Manufacturing method of multicolor molded products

Publications (2)

Publication Number Publication Date
JP2018140537A JP2018140537A (en) 2018-09-13
JP6871017B2 true JP6871017B2 (en) 2021-05-12

Family

ID=63527449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017035489A Active JP6871017B2 (en) 2017-02-27 2017-02-27 Manufacturing method of multicolor molded products

Country Status (1)

Country Link
JP (1) JP6871017B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115122574B (en) * 2022-08-11 2023-04-28 石家庄源鑫科技股份有限公司 Injection molding device and method for plastic product cover spoon

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146514A (en) * 1984-12-20 1986-07-04 Nhk Spring Co Ltd Manufacture of cushion body
JP2508778B2 (en) * 1987-12-25 1996-06-19 三菱マテリアル株式会社 Multicolor molding method and multicolor molding die
JPH04371812A (en) * 1991-06-20 1992-12-24 Toyota Motor Corp Manufacture of cushion which is one with skin and has different hardness
JP2897863B2 (en) * 1995-03-29 1999-05-31 河西工業株式会社 Molding method and molding apparatus for laminated molded article
JP2000226021A (en) * 1999-02-03 2000-08-15 Gifu Plast Ind Co Ltd Carrying container and its manufacture
JP4841299B2 (en) * 2006-04-20 2011-12-21 株式会社イノアックコーポレーション Manufacturing method of foam products
JP5219521B2 (en) * 2008-01-08 2013-06-26 株式会社ジェイエスピー Manufacturing method of floor spacer for automobile

Also Published As

Publication number Publication date
JP2018140537A (en) 2018-09-13

Similar Documents

Publication Publication Date Title
US8052909B2 (en) Injection moulding process
CA1234466A (en) Stabilized core injection molding
JP5033091B2 (en) Multicolor mold
US20030201570A1 (en) Injection molding method, injection mold, resin-molded article, and insert resin component
JP6156985B2 (en) Injection molding method and resin molded product
US5980805A (en) Method of making multilayer molded article
DE102010036103A1 (en) Method for producing a multilayer preform and preform
US7674415B2 (en) Process for the production of plates made of transparent plastic material with non-transparent overinjected parts
KR20180048941A (en) Mold with vent
GB2404895A (en) Multi-shot moulding method and assembly
JP6871017B2 (en) Manufacturing method of multicolor molded products
WO2004018178A1 (en) Metal mold for connected product and method of molding the product
US20070122623A1 (en) Localized injection overmolding and articles produced thereby
KR20160000996U (en) Mold for injection molding
JP2009262499A (en) Foamed resin molded article and its molding process
JP2009073112A (en) Molding method of two-color molded product and mold
KR101487010B1 (en) Multi-component injection mold and injection method
KR102179306B1 (en) Dual injection molding mold for vehicle interior materials and Molding method of vehicle interior materials using dual injection molding mold
US7938638B2 (en) Mould for the injection-moulding a component comprising two portions which are composed of different materials
JP5244426B2 (en) Skin material insert molding apparatus and molding method
JPH0716873A (en) Manufacture of resin product for automobile
JP2011104839A (en) Multilayered molded product and method for molding the molded product
JP3881118B2 (en) Mold for partial decorative integral molding of skin material and partial decorative molding method for skin material
JP5403800B2 (en) Multicolor molded product molding method and molding apparatus
JP6771873B2 (en) Resin molded products and their manufacturing methods

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20191225

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20201221

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210106

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210218

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20210406

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20210415

R150 Certificate of patent or registration of utility model

Ref document number: 6871017

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250