JPH0735021U - Injection mold - Google Patents
Injection moldInfo
- Publication number
- JPH0735021U JPH0735021U JP6779493U JP6779493U JPH0735021U JP H0735021 U JPH0735021 U JP H0735021U JP 6779493 U JP6779493 U JP 6779493U JP 6779493 U JP6779493 U JP 6779493U JP H0735021 U JPH0735021 U JP H0735021U
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- Prior art keywords
- cooling
- molded product
- cooling hole
- core
- mold
- Prior art date
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Abstract
(57)【要約】
【目的】金型の移動型のコア部の冷却温度を均一にする
ことにより、反りやひけをなくして外観品質を向上さ
せ、且つ強度を増大させ、更に成形サイクルを短縮して
生産性を向上させることのできる射出成形金型を提供す
る。
【構成】成形品１の内面側を成形するための移動型のコ
ア部２に冷却孔５が設けられ、この冷却孔５が、冷却孔
５の表面よりコア部２の外周面までの最短距離がほぼ等
距離となるように設けられた射出成形金型。
(57) [Summary] [Purpose] By uniforming the cooling temperature of the core part of the movable mold of the mold, warpage and sink marks are eliminated to improve the appearance quality, increase the strength, and further shorten the molding cycle. And an injection molding die capable of improving productivity. A cooling hole 5 is provided in a movable core part 2 for molding the inner surface side of a molded product 1. The cooling hole 5 is the shortest distance from the surface of the cooling hole 5 to the outer peripheral surface of the core part 2. Is an injection molding die that is installed so that the distances are almost equidistant.
Description
【０００１】[0001]
本考案は、３次元曲面を有する合成樹脂製の成形品を成形する射出成形金型に 関する。 The present invention relates to an injection molding die for molding a synthetic resin molded product having a three-dimensional curved surface.
【０００２】[0002]
従来、３次元曲面を有する合成樹脂製の成形品を成形する射出成形金型におい て、上記成形品の内面側を成形するための移動型のコア部の内部に設けられる冷 却孔は、コア部の形状が複雑な曲面を有しているので、直線的に設けられる冷却 孔とコア部外周面に至る最短距離は等距離にすることは事実上困難であった。 Conventionally, in an injection mold for molding a synthetic resin molded product having a three-dimensional curved surface, the cooling hole provided inside the core part of the movable mold for molding the inner surface side of the molded product is a core. Since the shape of the part has a complicated curved surface, it was practically difficult to make the shortest distance between the cooling hole provided linearly and the outer peripheral surface of the core part equal.
【０００３】 上記の従来の３次元曲面を有する合成樹脂製の成形品を成形する射出成形金型 に関し図面を参照して以下に説明する。An injection molding die for molding the above-described conventional synthetic resin molded article having a three-dimensional curved surface will be described below with reference to the drawings.
【０００４】 図６は、従来の３次元曲面を有する合成樹脂製の成形品を成形する射出成形金 型の例を示す断面図であり、硬質塩化ビニル樹脂製の雨樋上合の射出成形金型で あり、図７は、図６のＡ−Ａ断面図である。 図６において、１０は成形品（雨樋上合）であり、１１は３次元曲面を有する 上合部であり、１２は円筒部である。この上合部１１は断面形状がほぼ角形であ り、円筒部１２に向かってその断面がじょじょに縮小されてゆき、段部を経て円 筒部１２につながっている。 ２０はコア部であり、このコア部２０は上記成形品（雨樋上合）１０のキャビ ティの内面を成形するためのものであり、このコア部２０は上合部１１の内面側 を成形する上合部コア２１と、円筒部１２の内面側を成形する円筒部コア２２を 有し、一体でできている。 ２３は、コア部２０の受板である。FIG. 6 is a cross-sectional view showing an example of a conventional injection molding mold for molding a synthetic resin molded product having a three-dimensional curved surface. A rain gutter top injection molding mold made of hard vinyl chloride resin. 7 is a sectional view taken along line AA of FIG. In FIG. 6, 10 is a molded product (rain gutter top joint), 11 is an upper joint portion having a three-dimensional curved surface, and 12 is a cylindrical portion. The upper joining portion 11 has a substantially rectangular cross section, and the cross section thereof is gradually reduced toward the cylindrical portion 12, and is connected to the cylindrical portion 12 via the step portion. Reference numeral 20 denotes a core portion, and this core portion 20 is for molding the inner surface of the cavity of the above-mentioned molded product (rain gutter top joint) 10, and this core portion 20 forms the inner surface side of the upper joint portion 11. The upper joint portion core 21 and the cylindrical portion core 22 that molds the inner surface side of the cylindrical portion 12 are included and integrally formed. Reference numeral 23 is a receiving plate of the core portion 20.
【０００５】 ３０は固定型であり、３１はスライドコア（図示しない）を有する固定型板で ある。この固定型板３１には、入れ子３２が設けられ、この入れ子３２の中心部 にスプルブッシュ３３が圧入され、溶融樹脂の射出されるスプル４０とランナー ４１が貫通して設けられている。Reference numeral 30 is a fixed die, and 31 is a fixed die plate having a slide core (not shown). The fixed mold plate 31 is provided with a nest 32, and a sprue bush 33 is press-fitted into the center of the nest 32, and a sprue 40 and a runner 41 through which molten resin is injected are provided so as to penetrate therethrough.
【０００６】 ５０はコア部２０内に設けられた冷却孔であり、この冷却孔５０は、コア部２ ０内に５１、５２、及び５３、５４（図示しない）の４本が設けられている。 又、この冷却孔５０は、受板２３に対してほぼ垂直方向に穿設されている。即 ち、成形品（雨樋上合）１０と平行となっており、上合部１１の上方のくびれ部 １３の近傍まで延びている。 ５１ａ、５２ａはコア部２０の下端であり、受板２３との境界部に設けられた 冷却孔５１、及び５２の栓プラグである。Reference numeral 50 denotes a cooling hole provided in the core portion 20. The cooling hole 50 has four cooling holes 51, 52, 53, 54 (not shown) provided in the core portion 20. . Further, the cooling hole 50 is formed in a direction substantially perpendicular to the receiving plate 23. That is, it is parallel to the molded product (rain gutter top joint) 10 and extends to the vicinity of the constricted portion 13 above the top joint portion 11. 51a and 52a are the lower ends of the core part 20 and are plugs of cooling holes 51 and 52 provided at the boundary with the receiving plate 23.
【０００７】 図７において、６１、及び６２は冷却孔５１、及び５２の側面にほぼ垂直方向 より貫通して設けられた冷却孔であり、この冷却孔６１、及び６２は、冷却孔５ １、及び５２を貫通して、更に、冷却孔６１ａ、及び６２ａへ延びて冷却孔５３ 、及び５４に開通されている。In FIG. 7, reference numerals 61 and 62 denote cooling holes that are provided so as to penetrate the side surfaces of the cooling holes 51 and 52 in a substantially vertical direction. The cooling holes 61 and 62 are the cooling holes 51, 52. And 52, and further extends to cooling holes 61a and 62a, and is opened to cooling holes 53 and 54.
【０００８】 ６１ａ、６２ａは冷却水の接続口であり、この接続口６１ａ、及び６２ａには 金型外部よりの冷却管により配管されて接続され、冷却孔５０に冷却水が循環さ れてコア部２０の冷却が行われる。Reference numerals 61a and 62a denote cooling water connection ports. The connection ports 61a and 62a are connected by being piped by a cooling pipe from the outside of the mold, and the cooling water is circulated through the cooling holes 50 to form cores. The part 20 is cooled.
【０００９】[0009]
しかしながら、上記の成形品（雨樋上合）１０の射出成形金型においては、図 ６の図中のａ、ｂ、及びｃで示すように、冷却孔の表面よりコア部外周面までの 最短距離が、それぞれに異なっており、キャビティ内に射出成形された成形品を 冷却するためのコア部の表面温度に差がでるため、又、角部のｂにおいては冷却 状態が特に悪くなり、冷却される成形品（雨樋上合）１０は温度差のある状態で 金型より取り出されるため、外観品質（反り、引け）に影響を及ぼすといった問 題の他、冷却効果の良くない部分の冷却時間に成形サイクルを合わせるため、生 産性を低下させるといった問題もある。 However, in the injection molding die of the above-mentioned molded product (rain gutter top joint) 10, the shortest distance from the surface of the cooling hole to the outer peripheral surface of the core part as shown by a, b, and c in the drawing of FIG. However, there is a difference in the surface temperature of the core part for cooling the injection-molded product in the cavity, and the cooling condition becomes particularly bad at the corner b, and the Since the molded product (rain gutter) 10 is taken out of the mold with a temperature difference, it affects the appearance quality (warpage, shrinkage), and the cooling time of the part with poor cooling effect. Since the molding cycle is adjusted, there is a problem that productivity is reduced.
【００１０】 本考案は、このような上記の問題点に着目してなされたものであり、これらの 問題点を解消し、金型の移動型のコア部の冷却温度を均一にすることにより、反 りやひけをなくして外観品質を向上させ、且つ強度を増大させ、更に成形サイク ルを短縮して生産性を向上させることのできる射出成形金型を提供するものであ る。The present invention has been made by paying attention to the above problems, and by solving these problems and making the cooling temperature of the movable core of the mold uniform, It is intended to provide an injection molding die capable of improving the appearance quality by increasing the strength by eliminating warpage and sink marks, and further shortening the molding cycle to improve the productivity.
【００１１】[0011]
本考案の射出成形金型においては、３次元曲面を有する合成樹脂製の成形品を 成形する固定型と移動型よりなる射出成形金型であって、上記成形品の内面側を 成形するための移動型のコア部に冷却孔が設けられ、且つ、この冷却孔が、冷却 孔の表面よりコア部の外周面までの最短距離がほぼ等距離となるように設けられ ていることを特徴とする。 The injection mold of the present invention is an injection mold composed of a fixed mold and a movable mold for molding a synthetic resin molded product having a three-dimensional curved surface, which is used for molding the inner surface side of the molded product. The movable core part is provided with cooling holes, and the cooling holes are provided so that the shortest distance from the surface of the cooling holes to the outer peripheral surface of the core part is substantially equal. .
【００１２】[0012]
本考案の射出成形金型においては、成形品の内面側を成形するための移動型の コア部に冷却孔が設けられ、且つ、この冷却孔が、冷却孔の表面よりコア部の外 周面までの最短距離がほぼ等距離となるように設けられていることにより、コア 部の冷却温度が均一となり、反りやひけをなくして外観品質を向上させ、且つ強 度を増大させ、更に成形サイクルを短縮して生産性を向上させることができる。 In the injection molding die of the present invention, a cooling hole is provided in the core part of the movable mold for molding the inner surface side of the molded product, and the cooling hole is formed on the outer peripheral surface of the core part from the surface of the cooling hole. Since the shortest distance to the core is almost equal, the cooling temperature of the core part is uniform, warpage and sink marks are eliminated, the appearance quality is improved, and the strength is increased. Can be shortened to improve productivity.
【００１３】[0013]
以下、本考案の実施例を図面を参照して説明する。 〔実施例１〕 図１は、本考案の３次元曲面を有する合成樹脂製の成形品を成形する射出成形 金型の一例を示す断面図であり、硬質塩化ビニル樹脂製の雨樋上合の射出成形金 型であり、図２は、図１のＢ−Ｂ断面図である。 図１において、１は成形品（雨樋上合）であり、１ａは３次元曲面を有する上 合部であり、１ｂは円筒部である。この上合部１ａは断面形状がほぼ角形であり 、円筒部１ｂに向かってその断面がじょじょに縮小されてゆき、段部を経て円筒 部１ｂにつながっている。 ２はコア部であり、このコア部２は上記成形品（雨樋上合）１のキャビティの 内面を成形するためのものであり、このコア部２は上合部１ａの内面側を成形す る上合部コア２ａと、円筒部１ｂの内面側を成形する円筒部コア２ｂを有し、一 体でできている。 ２ｃは、コア部２の受板である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Embodiment 1] FIG. 1 is a cross-sectional view showing an example of an injection mold for molding a synthetic resin molded product having a three-dimensional curved surface of the present invention. It is a molding die, and FIG. 2 is a sectional view taken along line BB of FIG. In FIG. 1, 1 is a molded product (rain gutter top joint), 1a is an upper joint having a three-dimensional curved surface, and 1b is a cylindrical portion. The upper joining portion 1a has a substantially rectangular cross section, and the cross section thereof is gradually reduced toward the cylindrical portion 1b, and is connected to the cylindrical portion 1b via a step. Reference numeral 2 is a core portion, and this core portion 2 is for molding the inner surface of the cavity of the above-mentioned molded product (rain gutter top joint) 1, and this core portion 2 is for molding the inner surface side of the upper joint portion 1a. It has an upper mating part core 2a and a cylindrical part core 2b for molding the inner surface side of the cylindrical part 1b, and is made of one body. 2 c is a receiving plate of the core portion 2.
【００１４】 ３は固定型であり、３ａはスライドコア（図示しない）を有する固定型板であ る。この固定型板３ａには、入れ子３ｂが設けられ、この入れ子３ｂの中心部に スプルブッシュ３ｃが圧入され、溶融樹脂の射出されるスプル４とランナー４ａ が貫通して設けられている。Reference numeral 3 is a fixed die, and 3a is a fixed die plate having a slide core (not shown). The fixed mold plate 3a is provided with a nest 3b, and a sprue bush 3c is press-fitted into the center of the nest 3b, and a sprue 4 and a runner 4a for injecting molten resin are provided therethrough.
【００１５】 ５はコア部２内に設けられた断面形状が円形の冷却孔であり、この冷却孔５は 、コア部２の外周面に沿って一定間隔をおいて平行に設けられている。即ち、冷 却孔５の表面よりコア部２の外周面までの最短距離が、冷却孔の先端に至るまで のどの部分においてもほぼ等距離となるように設けられている。 図１の図中に示すｄ、及びｅの距離が等しいことを意味している。Reference numeral 5 denotes a cooling hole provided in the core portion 2 and having a circular cross-sectional shape. The cooling holes 5 are provided in parallel along the outer peripheral surface of the core portion 2 at regular intervals. That is, the shortest distance from the surface of the cooling hole 5 to the outer peripheral surface of the core portion 2 is provided so as to be substantially the same distance in any portion up to the tip of the cooling hole. This means that the distances d and e shown in the drawing of FIG. 1 are equal.
【００１６】 又、冷却孔５の先端部の形状も、成形品（雨樋上合）１のくびれ部１ｃに沿っ て平行に設けられており、冷却孔５の先端部の傾斜部の図中に示すｆの距離は、 上記のｄ、及びｅの距離とほぼ等しくなっている。 上記の冷却孔５は、コア部２内に５ａ、５ｂ、及び５ｃ、５ｄ（図示しない） の４本が設けられている。Further, the shape of the tip of the cooling hole 5 is also provided in parallel along the constricted portion 1c of the molded product (rain gutter top joint) 1, and the inclined portion of the tip of the cooling hole 5 is shown in the drawing. The distance of f shown is almost equal to the distances of d and e described above. The cooling hole 5 is provided in the core portion 2 with four holes 5a, 5b, and 5c, 5d (not shown).
【００１７】 ５ｅ、５ｆはコア部２０の下端であり、受板２ｃとの境界部に設けられた冷却 孔５ａ、及び５ｂの栓プラグである。Reference numerals 5e and 5f are lower ends of the core portion 20, and are plug plugs of the cooling holes 5a and 5b provided at the boundary with the receiving plate 2c.
【００１８】 図２において、６ａ、及び６ｂは冷却孔５ａ、及び５ｂの側面にほぼ垂直方向 より貫通して設けられた冷却孔であり、この冷却孔６ａ、及び６ｂは、冷却孔５ ａ、及び５ｂを貫通して、更に、冷却孔６ｅ、及び６ｆへ延びて冷却孔５ｃ、及 び５ｄに開通されている。In FIG. 2, reference numerals 6a and 6b denote cooling holes that are provided through the side surfaces of the cooling holes 5a and 5b in a substantially vertical direction. The cooling holes 6a and 6b are the cooling holes 5a and 5b. And 5b, further extends to cooling holes 6e and 6f, and is opened to cooling holes 5c and 5d.
【００１９】 ６ｃ、６ｄは冷却水の接続口であり、この接続口６ｃ、及び６ｄには金型外部 よりの冷却管により配管されて接続され、冷却孔５に冷却水が循環されてコア部 ２の冷却が行われる。Reference numerals 6 c and 6 d are cooling water connection ports. The connection ports 6 c and 6 d are connected by being piped by a cooling pipe from the outside of the mold, and the cooling water is circulated through the cooling holes 5 to form a core portion. 2 cooling is performed.
【００２０】 上記の成形品（雨樋上合）１の射出成形金型においては、図１の図中のｄ、ｅ 、及びｆで示すように、冷却孔の表面よりコア部の外周面までの最短距離がほぼ 等距離となるように設けられていることにより、キャビティ内に射出成形された 成形品を冷却するためのコア部の表面温度を均一にすることができ、冷却される 成形品（雨樋上合）１は温度が均一の状態で金型より取り出されるため、反りや 引けのない均質な外観を有し、冷却効果の良いため成形サイクルを短縮でき、生 産性を向上させることができる。In the injection molding die of the above-described molded product (rain gutter top joint) 1, as shown by d, e and f in the drawing of FIG. 1, from the surface of the cooling hole to the outer peripheral surface of the core portion. Since the shortest distances are set to be almost equal, the surface temperature of the core part for cooling the injection-molded product in the cavity can be made uniform and the cooled product ( Rain gutter top 1) is taken out of the mold in a uniform temperature, so it has a uniform appearance without warpage or shrinkage, and has a good cooling effect, which can shorten the molding cycle and improve productivity. it can.
【００２１】 〔実施例２〕 図３は、本考案の射出成形金型の他の例を示す上面図であり、実施例１と同様 の硬質塩化ビニル樹脂製の雨樋上合の射出成形金型である。 本実施例の実施例１との相違点は、断面形状がほぼ四角形の冷却孔が設けられ ている点である。[Embodiment 2] FIG. 3 is a top view showing another example of the injection mold of the present invention, which is the same as that of Embodiment 1 and made of a hard vinyl chloride resin. Is. The difference between this embodiment and Embodiment 1 is that cooling holes having a substantially rectangular cross section are provided.
【００２２】 ７はコア部２（図示しない）内に設けられた断面形状がほぼ四角形の冷却孔で あり、この冷却孔７は、実施例１と同様、コア部２の外周面に沿って一定間隔を おいて平行に設けられている。即ち、冷却孔７の表面よりコア部２の外周面まで の最短距離が、冷却孔の先端に至るまでのどの部分においてもほぼ等距離となる ように設けられている。Reference numeral 7 denotes a cooling hole provided in the core portion 2 (not shown) and having a substantially rectangular cross-sectional shape. The cooling hole 7 is constant along the outer peripheral surface of the core portion 2 as in the first embodiment. They are provided in parallel at intervals. That is, the shortest distance from the surface of the cooling hole 7 to the outer peripheral surface of the core portion 2 is provided so as to be substantially equal at any portion up to the tip of the cooling hole.
【００２３】 本実施例における冷却孔７は、四角形の２辺が成形品（雨樋上合）１の角を含 む２辺に対してほぼ平行になるように穿設されていることにより、冷却孔７の表 面のコア部２の外周面に至る距離がより均一化されて、円形断面の場合より、よ り冷却効率を向上させることが出来る。The cooling hole 7 in this embodiment is formed so that the two sides of the quadrangle are substantially parallel to the two sides including the corners of the molded product (rain gutter top) 1 so that the cooling is performed. The distance from the surface of the hole 7 to the outer peripheral surface of the core portion 2 is made more uniform, and the cooling efficiency can be improved more than in the case of a circular cross section.
【００２４】 又、冷却孔７の先端部の形状も、実施例１と同様、成形品（雨樋上合）１のく びれ部１ｃ（図１参照）に沿って平行に設けられており、冷却孔７の先端部の傾 斜部の図１に示すｆの距離は、上記のｄ、及びｅの距離と等しくなっている。 上記の冷却孔７は、コア部２内に７ａ、７ｂ、及び７ｃ、７ｄ（図示しない） の４本が設けられている。Further, the shape of the tip of the cooling hole 7 is also provided in parallel along the narrowed portion 1c (see FIG. 1) of the molded product (rain gutter top) 1 as in the case of the first embodiment. The distance f of the inclined portion at the tip of the hole 7 shown in FIG. 1 is equal to the distances d and e described above. Four cooling holes 7a, 7b, and 7c, 7d (not shown) are provided in the core portion 2.
【００２５】 図３において、８ａ、及び８ｂは冷却孔７ａ、及び７ｂの側面にほぼ垂直方向 より貫通して設けられた冷却孔であり、この冷却孔８ａ、及び８ｂは、冷却孔７ ａ、及び７ｂを貫通して、更に、冷却孔８ｅ、及び８ｆへ延びて冷却孔７ｃ、及 び７ｄに開通されている。In FIG. 3, reference numerals 8a and 8b denote cooling holes that are provided so as to penetrate the side surfaces of the cooling holes 7a and 7b in a substantially vertical direction. The cooling holes 8a and 8b are the cooling holes 7a and 7b. And 7b, further extends to cooling holes 8e and 8f, and is opened to cooling holes 7c and 7d.
【００２６】 ８ｃ、８ｄは冷却水の接続口であり、この接続口８ｃ、及び８ｄには金型外部 よりの冷却管により配管されて接続され、冷却孔７に冷却水が循環されてコア部 ２の冷却が行われる。Reference numerals 8c and 8d are cooling water connection ports. The connection ports 8c and 8d are connected by being piped by a cooling pipe from the outside of the mold, and the cooling water is circulated through the cooling holes 7 to form core parts. 2 cooling is performed.
【００２７】 本考案の射出成形金型を用いた硬質塩化ビニル樹脂による射出成形テストを実 施した結果、従来の射出成形金型の場合、冷却後の成形品（雨樋上合）１の表面 の最高温度が摂氏５０度であったのに対して、実施例１では摂氏４２度、実施例 ２では摂氏４０度であった。As a result of carrying out an injection molding test using a hard vinyl chloride resin using the injection molding die of the present invention, in the case of the conventional injection molding die, the surface of the molded product (rain gutter) 1 after cooling The maximum temperature was 50 degrees Celsius, whereas in Example 1, it was 42 degrees Celsius, and in Example 2, it was 40 degrees Celsius.
【００２８】 本実施例の成形品（雨樋上合）１の射出成形金型においても、実施例１と同様 、冷却孔の表面よりコア部の外周面までの最短距離がほぼ等距離となるように設 けられていることにより、キャビティ内に射出成形された成形品を冷却するため のコア部の表面温度を均一にすることができ、冷却される成形品（雨樋上合）１ は温度が均一の状態で金型より取り出されるため、反りや引けのない均質な外観 を有し、冷却効果の良いため成形サイクルを短縮でき、生産性を向上させること ができる。Also in the injection molding die of the molded product (rain gutter top joint) 1 of this embodiment, the shortest distance from the surface of the cooling hole to the outer peripheral surface of the core portion is set to be substantially the same distance as in the first embodiment. Since it is installed in the cavity, the surface temperature of the core part for cooling the molded product injection-molded in the cavity can be made uniform, and the temperature of the cooled molded product (rain gutter) 1 Since it is taken out of the mold in a uniform state, it has a uniform appearance without warpage or shrinkage, and because of its good cooling effect, the molding cycle can be shortened and productivity can be improved.
【００２９】 図４は、放電加工用の電極の一例を示す側面、及び正面図であり、実施例１の 冷却孔５を放電加工により穿設するための電極の例である。 １００は断面が円形の電極本体であり、この電極本体１００の先端部１０１は 、冷却孔５の先端部が成形品（雨樋上合）１のくびれ部１ｃとほぼ平行になるよ うに傾斜面となったものである。FIG. 4 is a side view and a front view showing an example of an electrode for electric discharge machining, which is an example of an electrode for forming the cooling hole 5 of Example 1 by electric discharge machining. Reference numeral 100 denotes an electrode body having a circular cross section. A tip portion 101 of the electrode body 100 is formed with an inclined surface so that the tip portion of the cooling hole 5 is substantially parallel to the constricted portion 1c of the molded product (rain gutter top joint) 1. It has become.
【００３０】 図５は、放電加工用の電極の他の例を示す側面、及び正面図であり、実施例２ の冷却孔７を放電加工により穿設するための電極である。 ２００は角部の面取りされた断面がほぼ四角形の電極本体であり、この電極本 体２００の先端部２０１は、冷却孔７の先端部が成形品（雨樋上合）１のくびれ 部１ｃ（実施例１と同様）とほぼ平行になるように傾斜面となったものである。FIG. 5 is a side view and a front view showing another example of the electric discharge machining electrode, which is an electrode for forming the cooling hole 7 of the second embodiment by electric discharge machining. Reference numeral 200 denotes an electrode body whose corners are chamfered and whose cross section is substantially quadrangular. The tip portion 201 of this electrode body 200 is such that the tip portion of the cooling hole 7 is a constricted portion 1c of the molded product (rain gutter top joint) 1 (Similar to Example 1) and has an inclined surface so as to be substantially parallel.
【００３１】 上記実施例１、及び実施例２のそれぞれの冷却孔５、及び７の加工に当たって は、ドリル、或いはエンドミルによる穿彫加工の後、型彫放電加工機により先端 部の加工を行うのが好ましい。In the processing of the cooling holes 5 and 7 of each of the above-described first and second embodiments, the tip portion is processed by the die-sinking electric discharge machine after the drilling by the drill or the end mill. Is preferred.
【００３２】[0032]
本考案の射出成形金型においては、成形品の内面側を成形するための移動型の コア部に冷却孔が設けられ、且つ、この冷却孔が、冷却孔の表面よりコア部の外 周面までの最短距離がほぼ等距離となるように設けられていることにより、コア 部の冷却温度が均一となり、反りやひけをなくして外観品質を向上させ、且つ強 度を増大させ、更に成形サイクルを短縮して生産性を向上させることができる。 従って、３次元曲面を有する合成樹脂製の成形品を成形する射出成形金型とし て好適である。 In the injection molding die of the present invention, a cooling hole is provided in the core part of the movable mold for molding the inner surface side of the molded product, and the cooling hole is formed on the outer peripheral surface of the core part from the surface of the cooling hole. Since the shortest distance to the core is almost equal, the cooling temperature of the core part is uniform, warpage and sink marks are eliminated, the appearance quality is improved, and the strength is increased. Can be shortened to improve productivity. Therefore, it is suitable as an injection mold for molding a synthetic resin molded product having a three-dimensional curved surface.
【図１】本考案の３次元曲面を有する合成樹脂製の成形
品を成形する射出成形金型の一例を示す断面図。FIG. 1 is a sectional view showing an example of an injection molding die for molding a synthetic resin molded product having a three-dimensional curved surface of the present invention.
【図２】図１のＢ−Ｂ断面図。FIG. 2 is a sectional view taken along line BB of FIG.
【図３】本考案の射出成形金型の他の例を示す上面図。FIG. 3 is a top view showing another example of the injection molding die of the present invention.
【図４】放電加工用の電極の一例を示す側面、及び正面
図。FIG. 4 is a side view and a front view showing an example of an electrode for electric discharge machining.
【図５】放電加工用の電極の他の例を示す側面、及び正
面図。FIG. 5 is a side view and a front view showing another example of an electrode for electric discharge machining.
【図６】従来の３次元曲面を有する合成樹脂製の成形品
を成形する射出成形金型の一例を示す断面図。FIG. 6 is a cross-sectional view showing an example of an injection mold for molding a conventional synthetic resin molded product having a three-dimensional curved surface.
【図７】図６のＡ−Ａ断面図。7 is a cross-sectional view taken along the line AA of FIG.
１ 成形品（雨樋上合）筒状体 １ａ 上合部 １ｂ 円筒部 ２ コア部 ２ａ 上合部コア ２ｂ 円筒部コア ３ 固定型 ４ スプル ５（５ａ、５ｂ、５ｃ、５ｄ） 冷却孔 DESCRIPTION OF SYMBOLS 1 Molded product (rain gutter top joint) Cylindrical body 1a Upper joint part 1b Cylindrical part 2 Core part 2a Upper joint part core 2b Cylindrical part core 3 Fixed type 4 Sprue 5 (5a, 5b, 5c, 5d) Cooling hole
Claims (1)
成形する固定型と移動型よりなる射出成形金型であっ
て、上記成形品の内面側を成形するための移動型のコア
部に冷却孔が設けられ、且つ、この冷却孔が、冷却孔の
表面よりコア部の外周面までの最短距離がほぼ等距離と
なるように設けられていることを特徴とする射出成形金
型。1. An injection molding die comprising a fixed mold and a movable mold for molding a synthetic resin molded product having a three-dimensional curved surface, the core part of the movable mold for molding the inner surface side of the molded product. An injection-molding die, characterized in that a cooling hole is provided in the cooling hole, and the cooling hole is provided so that the shortest distance from the surface of the cooling hole to the outer peripheral surface of the core portion is substantially equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993067794U JP2591150Y2 (en) | 1993-12-20 | 1993-12-20 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993067794U JP2591150Y2 (en) | 1993-12-20 | 1993-12-20 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0735021U true JPH0735021U (en) | 1995-06-27 |
| JP2591150Y2 JP2591150Y2 (en) | 1999-02-24 |
Family
ID=13355221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993067794U Expired - Fee Related JP2591150Y2 (en) | 1993-12-20 | 1993-12-20 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591150Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008032853A1 (en) * | 2006-09-11 | 2008-03-20 | Daikyo Seiko, Ltd. | Syringe forming mold |
| WO2013129762A1 (en) * | 2012-02-27 | 2013-09-06 | 주식회사 엘지화학 | Apparatus for manufacturing injection-molded articles, and method for manufacturing injection-molded articles using same |
| KR101409771B1 (en) * | 2012-02-27 | 2014-06-24 | 주식회사 엘지화학 | Apparatus for manufacturing injection molding products and method for manufacturing injection molding products using the same |
-
1993
- 1993-12-20 JP JP1993067794U patent/JP2591150Y2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008032853A1 (en) * | 2006-09-11 | 2008-03-20 | Daikyo Seiko, Ltd. | Syringe forming mold |
| US7874827B2 (en) | 2006-09-11 | 2011-01-25 | Daikyo Seiko Ltd. | Syringe mold |
| WO2013129762A1 (en) * | 2012-02-27 | 2013-09-06 | 주식회사 엘지화학 | Apparatus for manufacturing injection-molded articles, and method for manufacturing injection-molded articles using same |
| KR101409771B1 (en) * | 2012-02-27 | 2014-06-24 | 주식회사 엘지화학 | Apparatus for manufacturing injection molding products and method for manufacturing injection molding products using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2591150Y2 (en) | 1999-02-24 |
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