JP4525512B2

JP4525512B2 - Mold apparatus for forming a gripping member

Info

Publication number: JP4525512B2
Application number: JP2005216613A
Authority: JP
Inventors: 努後藤
Original assignee: Pentel Co Ltd
Current assignee: Pentel Co Ltd
Priority date: 2005-07-27
Filing date: 2005-07-27
Publication date: 2010-08-18
Anticipated expiration: 2025-07-27
Also published as: JP2007030330A

Description

本発明は、多色成形或いは、異材質成形における金型装置に関するものであり、例えば、外層と内層の硬度が異なる筆記具の把持部材などを成形する金型装置に関する。 The present invention relates to a mold apparatus for multicolor molding or molding of different materials, for example, a mold apparatus for molding a gripping member of a writing instrument having different outer layer and inner layer hardnesses.

シャープペンシルやボールペンなど筆記具の把持する部分には、ゴム状弾性体から構成されるグリップが被着されている。従来、このグリップは１種の材質から構成されているが、近年においては、グリップの多様化が図られ、柔らかい内層の上面にその内層よりも硬い外層を被覆したグリップが市販されるようになってきた。そのグリップは内層と外層を別々に成形し、それら各々の層を嵌め合わせることによってグリップが構成されるようになっている。
しかし、柔らかい内層の上面に硬い外層を嵌め合わせることは組み立て工数を要するばかりでなく、柔らかいが故に滑りが悪く挿着が困難であり、そのため、前記柔らかい内層と硬い外層を一体成形する、所謂、多色成形が考えられるようになってきた。
特開２００３−２１１８８９号公報 A grip made of a rubber-like elastic body is attached to a portion held by a writing instrument such as a mechanical pencil or a ballpoint pen. Conventionally, this grip is made of one kind of material. However, in recent years, the grip has been diversified, and a grip in which an outer layer harder than the inner layer is coated on the upper surface of the soft inner layer has been put on the market. I came. The grip is formed by forming the inner layer and the outer layer separately and fitting the respective layers together.
However, fitting the hard outer layer to the upper surface of the soft inner layer not only requires assembly man-hours, but because of the softness, slipping is difficult and insertion is difficult, so the soft inner layer and the hard outer layer are integrally formed, so-called, Multicolor molding has been considered.
JP 2003-211889 A

通常、多色成形は、内層を硬い材質にする一方、外層を柔らかい材質にしている。内層を柔らかい材質にし、その上面に硬い外層を形成すると、その硬い外層を成形する際の樹脂の流入圧力によって前記柔らかい内層が変形したり捲れたり、強いては、柔らかい内層が押しのけられ硬い外層のみの部分が形成されてしまい、その結果、製品としての価値を著しく落としてしまうからである。 Usually, multi-color molding uses a hard material for the inner layer and a soft material for the outer layer. If the inner layer is made of a soft material and a hard outer layer is formed on the upper surface, the soft inner layer may be deformed or twisted by the inflow pressure of the resin when the hard outer layer is molded. This is because a part is formed, and as a result, the value as a product is significantly reduced.

上記の従来技術も例外ではない。具体的に説明すると、柔らかい樹脂で内層１を形成し（図７参照）、次いで、その内層１の上面に内層１よりも硬い外層２を形成する樹脂をキャビティー６に流入すると、前記内層１が変形しその内層１と外層２が混濁してしまう（図８参照）。
尚、最初に硬い外層２を成形し、次いで、その外層２の内面に柔らかい内層１を成形する多色成形手段もあるが、袋状になっている外層２の内面に内層１となる樹脂が流入する際、樹脂中に含まれるガスの逃げ場が無く、その結果、グリップにガスが液状となって堆積し、その様なグリップにあっては、液状となったガスの汚れが指などに付着するばかりでなく、表面状態が粗悪なものとなり製品としての機能も著しく損ねてしまい、実用化には至らなかった。 The above prior art is no exception. More specifically, when the inner layer 1 is formed of a soft resin (see FIG. 7) and then the resin that forms the outer layer 2 harder than the inner layer 1 is flowed into the cavity 6 on the upper surface of the inner layer 1, the inner layer 1 Is deformed and the inner layer 1 and the outer layer 2 become turbid (see FIG. 8).
There is also a multicolor molding means that first molds the hard outer layer 2 and then molds the soft inner layer 1 on the inner surface of the outer layer 2. However, the resin that forms the inner layer 1 is formed on the inner surface of the outer layer 2 in the form of a bag. When flowing in, there is no escape space for the gas contained in the resin, and as a result, the gas accumulates in a liquid state on the grip, and in such a grip, the contaminated gas is attached to the fingers. In addition to this, the surface condition became poor, and the function as a product was remarkably impaired, so that it was not put into practical use.

本発明は、硬い弾性体からなる外層が配置され、その外層の内側に柔らかい弾性体からなる内層を有する把持部材を成形する金型装置であって、その金型装置は前記外層を成形する１次側キャビティーと、内層を成形する２次側キャビティーを有すると共に、前記１次側キャビティーの内方には外層に空間部を形成する1次側先ピンが配置され、一方、２次側キャビティーの内方には内層に空間部を形成する２次側先ピンが配置され、また、それら１次側キャビティーと１次側先ピン、並びに、２次側キャビィーと２次側先ピンを、それぞれ１次固定側金型郡、並びに、２次固定側金型郡に配置すると共に、前記１次側先ピンと２次側先ピンに当接可能な可動側コアピンを可動側金型郡に配置した把持部材を成形する多色成形或いは、異材質成形における金型装置を要旨とする。 The present invention is a mold apparatus for forming a gripping member having an outer layer made of a hard elastic body and having an inner layer made of a soft elastic body inside the outer layer, the mold apparatus forming the outer layer 1 A secondary side cavity and a secondary side cavity that molds the inner layer are provided, and a primary side tip pin that forms a space portion in the outer layer is disposed inside the primary side cavity, while the secondary side cavity is disposed. A secondary side tip pin that forms a space portion in the inner layer is disposed inside the side cavity, and the primary side cavity and the primary side tip pin, as well as the secondary side cavity and the secondary side tip. The pins are arranged in the primary fixed side mold group and the secondary fixed side mold group, respectively, and the movable side core pin capable of contacting the primary side tip pin and the secondary side tip pin is moved to the movable side mold. Multi-color molding for molding gripping members arranged in the county or different material composition The main point is a mold apparatus in the form.

本発明は、硬い弾性体からなる外層が配置され、その外層の内側に柔らかい弾性体からなる内層を有する把持部材を成形する金型装置であって、その金型装置は前記外層を成形する１次側キャビティーと、内層を成形する２次側キャビティーを有すると共に、前記１次側キャビティーの内方には外層に空間部を形成する1次側先ピンが配置され、一方、２次側キャビティーの内方には内層に空間部を形成する２次側先ピンが配置され、また、それら１次側キャビティーと１次側先ピン、並びに、２次側キャビィーと２次側先ピンを、それぞれ１次固定側金型郡、並びに、２次固定側金型郡に配置すると共に、前記１次側先ピンと２次側先ピンに当接可能な可動側コアピンを可動側金型郡に配置した把持部材を成形する多色成形或いは、異材質成形における金型装置としているので、硬い外層の内面に柔らかい内層を容易に成形することができる。
また、内層側の柔らかい材料を外層の孔から流出させることにより、お互いの溶融・密着が向上すると共に、内層は柔らかく外層は弾性を有しているものの硬めであることかららクッション性に富み、また、外層の表面に露出した内層の柔らかい材料が滑り防止の効果を発揮する成形品が簡単な金型構造で得られるといった２次的効果も発生する。 The present invention is a mold apparatus for forming a gripping member having an outer layer made of a hard elastic body and having an inner layer made of a soft elastic body inside the outer layer, the mold apparatus forming the outer layer 1 A secondary side cavity and a secondary side cavity that molds the inner layer are provided, and a primary side tip pin that forms a space portion in the outer layer is disposed inside the primary side cavity, while the secondary side cavity is disposed. A secondary side tip pin that forms a space portion in the inner layer is disposed inside the side cavity, and the primary side cavity and the primary side tip pin, as well as the secondary side cavity and the secondary side tip. The pins are arranged in the primary fixed side mold group and the secondary fixed side mold group, respectively, and the movable side core pin capable of contacting the primary side tip pin and the secondary side tip pin is moved to the movable side mold. Multi-color molding for molding gripping members arranged in the county or different material composition Since the mold apparatus is in the form, a soft inner layer can be easily formed on the inner surface of the hard outer layer.
Also, by letting the soft material on the inner layer flow out of the holes in the outer layer, the melting and adhesion of each other are improved, and the inner layer is soft and the outer layer is elastic but elastic, so it is rich in cushioning, In addition, a secondary effect occurs in which a molded product in which the soft material of the inner layer exposed on the surface of the outer layer exhibits an anti-slip effect can be obtained with a simple mold structure.

筆記具の把持する部分に装着される筒状把持部品の完成品４３を成形する金型装置を例に挙げ、その１例を説明する。筒状の把持部品４３の外層を１次側成形樹脂Ｅとして、内層を２次側成形樹脂Ｇとして説明する。図１で示す多色成形装置で硬度差の有る２色を成形する金型装置である。１次側成形樹脂Ｅと２次側成形樹脂Ｇの混濁を避けるために、硬い方の１次側成形樹脂Ｅを先に成形する金型装置である。
尚、本例では、硬い方の１次側成形樹脂Ｅを例えばショアーＡ硬度が３５〜７０の中硬度弾性樹脂とし、柔らかい方の２次側成形樹脂Ｇを例えばショアーＡ硬度が５〜２５の低硬度弾性樹脂が選択されている。
しかし、外層を硬い方の１次側成形樹脂Ｅとして先に成形することは、容易であるが、この外層の内側に内層である２次側成形樹脂Ｇを均一な層として充填することは、未だ嘗てなされていなく、研究・開発が急がれていた。此れに対し、本願発明者は、その解決策を見出したので以下に説明する。 An example of a mold apparatus that molds a finished product 43 of a cylindrical gripping part that is mounted on a gripping part of a writing instrument will be described. The outer layer of the cylindrical gripping part 43 will be described as a primary molding resin E, and the inner layer will be described as a secondary molding resin G. 2 is a mold apparatus that molds two colors having a hardness difference with the multicolor molding apparatus shown in FIG. 1. In order to avoid turbidity between the primary side molding resin E and the secondary side molding resin G, this is a mold apparatus that first molds the harder primary side molding resin E.
In this example, the harder primary molding resin E is, for example, a medium hardness elastic resin having a Shore A hardness of 35 to 70, and the softer secondary molding resin G is, for example, a Shore A hardness of 5 to 25. Low hardness elastic resin is selected.
However, it is easy to mold the outer layer first as the harder primary molding resin E, but filling the inner secondary molding resin G as a uniform layer inside the outer layer It has not been rushed yet, and research and development were urgently needed. On the other hand, the inventor of the present application has found a solution and will be described below.

前記異材質成形金型装置を図１に示す。１次側固定側Ｋは、１次側成形品Ｄを成形する１次側キャビティー１２と１次側先ピン（１次コア）１３を具備している。更に、前記１次側固定側Ｋは、成形機により型締めされることで、前記１次側成形樹脂Ｅが充填可能な１次側閉鎖密閉空間（１次キャビティー）２４の一部分を具備している。
一方、可動側Ｍは、コアピン１６並びに、コアピン１６Ａと、ストリッパブッシュ１５を具備している。更に、前記１次側成形樹脂Ｅが充填可能な１次側閉鎖密閉空間２４の一部分を具備している。前記１次側閉鎖密閉空間２４の一部を具備する前記１次側固定側Ｋと可動側Ｍが互いに、成形機で型締めされることで、完全な前記閉鎖密閉空間２４を形成している。
前記１次側閉鎖密閉空間２４に１次側成形樹脂Ｅを充填し、その成形樹脂Ｅによって１次側成形品Ｄを成形後、型開きして、可動側Ｍのコアピン１６に係着された１次側成形品Ｄが、前記１次側の固定側Ｋから離間し可動側Ｒに移動する。その後、成形機により、２次側固定側Ｎ側に移動し型締めされる。尚、２次側固定側Ｎは、前記２次側先ピン（固定側コア）１８と２次側キャビティー１９とで構成されている。
前記可動側Ｍであるコアピン１６に係着された１次側成形品Ｄは、前記型締めにより、２次側キャビティー１９と２次側先ピン１８とで構成された前記固定側Ｎに挿入されることにより２次側閉鎖密閉空間３０を形成している。その後、前記２次側閉鎖密閉空間３０に２次側成形樹脂Ｇを射出充填し、その射出充填完了後、成形機により型開することで、ストリッパ１５を介してコアピン１６から筒状把持部品の完成品４３が離脱し落下する。此れで、把持部品の完成品４３の成形が完了する。
更に、前記可動側Ｍであるコアピン１６が再度、１次側固定側Ｋに移動し型締めされ１次側成形樹脂Ｅを成形する。このサイクルを繰り返すことによって、コアピン１６を具備した可動側Ｍと、同一形体のコアピン１６Ａを具備した可動側ＭＡが同時に射出成形される。
つまり、前記可動側Ｍと、同一形体の可動側ＭＡは、１次側の固定側Ｋと可動側Ｍ、また、２次側固定側Ｎと可動側ＭＡが、それぞれ成形機で型締め成形された後、成形機により型開されるのである。その際、１次側成形品Ｄは、コアピン１６に係着された状態を維持している。また、一方の、１次側成形品Ｄと２次側成形品Ｆで成形された把持部品の完成品４３は、コアピン１６Ａから離間して落下する。
その後、前記成形機の可動側が、スライド或いは回転し移動することで、前記１次側成形品Ｄをコアピン１６に係着された状態を保持したままの前記可動側Ｍは、前記２次側固定側Ｎ側へ移動する。また、前記把持部品の完成品４３をコアピン１６Ａから離間して落下させた状態の可動側ＭＡは、前記１次側固定側Ｋ側へ移動する。
つまり、可動側Ｍと可動側ＭＡが、成形機によって交互に移動され、また、成形を繰り返す異材質成形である。また、１度の射出成形で外層と内層が同時に成形することが可能なため、２台の成形機で各々外層と内層を成形するよりも成形コストの削減につながり、更に、外層と内層の嵌め込みによる組立工数が不必要であるため、更なるコストの削減が可能となる。 FIG. 1 shows the different-material molding die apparatus. The primary side fixed side K includes a primary side cavity 12 and a primary side tip pin (primary core) 13 for molding the primary side molded product D. Further, the primary side fixed side K includes a part of a primary side closed sealed space (primary cavity) 24 that can be filled with the primary side molding resin E by being clamped by a molding machine. ing.
On the other hand, the movable side M includes a core pin 16, a core pin 16 </ b> A, and a stripper bush 15. Furthermore, a part of the primary side closed sealed space 24 that can be filled with the primary side molding resin E is provided. The primary fixed side K and the movable side M, which comprise a part of the primary side closed sealed space 24, are clamped together by a molding machine to form the complete closed sealed space 24. .
The primary side closed sealed space 24 was filled with the primary side molding resin E, and after molding the primary side molded product D with the molding resin E, the mold was opened and engaged with the core pin 16 on the movable side M. The primary molded product D moves away from the primary fixed side K and moves to the movable side R. Thereafter, the mold is moved to the secondary fixed side N side and clamped. The secondary fixed side N includes the secondary tip pin (fixed core) 18 and a secondary cavity 19.
The primary side molded product D engaged with the core pin 16 which is the movable side M is inserted into the fixed side N constituted by the secondary side cavity 19 and the secondary side tip pin 18 by the mold clamping. As a result, the secondary side closed sealed space 30 is formed. Thereafter, the secondary side closed resin space 30 is injected and filled with the secondary side molding resin G, and after completion of the injection and filling, the mold is opened by a molding machine, so that the cylindrical gripping component can be removed from the core pin 16 via the stripper 15. The finished product 43 leaves and falls. This completes the molding of the gripped part finished product 43.
Further, the core pin 16 which is the movable side M is moved again to the primary side fixed side K and clamped to mold the primary side molding resin E. By repeating this cycle, the movable side M provided with the core pin 16 and the movable side MA provided with the core pin 16A having the same shape are simultaneously injection-molded.
In other words, the movable side M and the movable side MA of the same shape are formed by clamping the primary fixed side K and the movable side M, and the secondary fixed side N and the movable side MA, respectively, with a molding machine. After that, the mold is opened by a molding machine. At that time, the primary side molded product D is maintained in a state of being engaged with the core pin 16. Also, the gripped part finished product 43 formed by the one primary side molded product D and the secondary side molded product F drops away from the core pin 16A.
After that, the movable side of the molding machine slides or rotates and moves so that the movable side M while the primary side molded product D is held on the core pin 16 is fixed to the secondary side fixed. Move to side N. Further, the movable side MA in the state where the finished product 43 of the gripped part is dropped away from the core pin 16A moves to the primary fixed side K side.
That is, the movable side M and the movable side MA are alternately formed by different moldings by the molding machine and the molding is repeated. In addition, since the outer layer and inner layer can be molded simultaneously by one injection molding, the molding cost can be reduced compared to molding the outer layer and inner layer with two molding machines, and the outer layer and inner layer can be fitted. Since the assembly man-hour is not required, further cost reduction is possible.

前記１次側成形樹脂Ｅの充填流入空間である、１次側密閉閉鎖空間２４の構成について詳述する。前記１次側成形樹脂Ｅは、成形機のノズルと１次側スプルー２１並びに、１次側ランナ−２２及び、１次側ゲ−ト２３で連通する空間から１次側密閉閉鎖空間２４に流入し、１次側成形品Ｆとして成形される（図６参照）。前記１次側先ピン１３の外周面には、縦溝が形成されており、その縦溝が橋脚溝２８Ａとなっている。よって、１次側成形品Ｄである１次側成形樹脂Ｅの内面には、橋脚２８が形成されることになる。尚、１次側先ピン１３に形成した橋脚溝を、ディンプル状又は鉢巻状の溝としても良い。
更に、１次側成形品Ｄ部の１次側密閉閉鎖空間２４である、前記１次側キャビティー１２の内面部には凸部２６が形成されている。そして、成形機が型締めすることで、前記１次側先ピン１３と１次側キャビティー１２の内面部の凸部２６が圧嵌・当接し、１次側成形樹脂Ｅの流入充填が部分的に遮断・阻止される。この充填動作の遮断によって、１次側成形品Ｆには連通孔２９が形成される。尚、前記凸部を、１次キャビティーの内面部に形成しているが、前記凸部を１次コアの外周面に形成しても良い。具体的には、１次側先ピン１３Ａの外周面に凸部２６Ａとして形成している。
更に、前記１次側先ピン１３Ａに形成した凸部２６Ａが、圧嵌・当接する部分を１次キャビティー１２Ａの内面側としても良い。 The configuration of the primary side closed space 24, which is a filling inflow space for the primary side molding resin E, will be described in detail. The primary side molding resin E flows into the primary side closed closed space 24 from the space communicating with the nozzle of the molding machine, the primary side sprue 21, the primary side runner 22, and the primary side gate 23. And it shape | molds as the primary side molded article F (refer FIG. 6). A longitudinal groove is formed on the outer peripheral surface of the primary side tip pin 13, and the longitudinal groove serves as an abutment groove 28A. Therefore, the pier 28 is formed on the inner surface of the primary side molding resin E which is the primary side molded product D. The pier groove formed in the primary side tip pin 13 may be a dimple-shaped or headband-shaped groove.
Furthermore, the convex part 26 is formed in the inner surface part of the said primary side cavity 12 which is the primary side sealed enclosure space 24 of the primary side molded article D part. Then, when the molding machine clamps, the primary side tip pin 13 and the convex portion 26 of the inner surface portion of the primary side cavity 12 are press-fitted and abutted so that the inflow filling of the primary side molding resin E is partially performed. Is blocked or blocked. By blocking this filling operation, a communication hole 29 is formed in the primary side molded product F. In addition, although the said convex part is formed in the inner surface part of a primary cavity, you may form the said convex part in the outer peripheral surface of a primary core. Specifically, it is formed as a convex portion 26A on the outer peripheral surface of the primary side tip pin 13A.
Further, a portion where the convex portion 26A formed on the primary side tip pin 13A is press-fitted / contacted may be the inner surface side of the primary cavity 12A.

更に、前記１次側成形品Ｄである硬い方の１次側成形樹脂Ｅの成形手段を図６、図１０、図１１に示し説明する。前記１次側成形品Ｄである硬い方の１次側成形樹脂Ｅが成形された後、成形機のより金型の型開きが開始される。これにより、前記可動側Ｍが金型開き方向へ移動すると共に、１次側割型押板４Ａも同調し開き、１次側アンギュラピン１０Ａも移動する。この１次側アンギュラピン１０Ａの移動で、１次側割型９Ａに固着された１次側キャビティー１２が開くと同時に、１次側成形品Ｄは、１次側先ピン１３から抜き取られる方向に離間される。一方、１次側成形品Ｄの１次側ゲート２３は、型開時に切断され１次側スプルー２１及び１次側ランナー２２は１次側の固定側Ｋに残る。その後、更に型開することで固定側型板３Ａが開き１次側スプルー２１及び１次側ランナー２２の１次側ゲート２３部が前記１次側の固定側Ｋから離間される。このとき、前記ランナー２２をランナー取り出し機で取り除くか、或いは、自動で落下させる。次いで、１次側成形品Ｄは、前記可動側Ｍのコアピン１６側へと移動し２次側成形品Ｇの成形工程へと移動する。 Furthermore, the molding means of the harder primary side molding resin E which is the primary side molded product D will be described with reference to FIG. 6, FIG. 10, and FIG. After the hard primary side molding resin E, which is the primary side molded product D, is molded, the mold opening of the molding machine is started. Thereby, the movable side M moves in the mold opening direction, and the primary side split mold pressing plate 4A also synchronizes and opens, and the primary side angular pin 10A also moves. The primary side molded product D is pulled out from the primary side tip pin 13 at the same time when the primary side cavity 12 fixed to the primary side split die 9A is opened by the movement of the primary side angular pin 10A. Spaced apart. On the other hand, the primary side gate 23 of the primary side molded product D is cut when the mold is opened, and the primary side sprue 21 and the primary side runner 22 remain on the fixed side K on the primary side. Thereafter, the mold is further opened to open the fixed-side template 3A, and the primary-side sprue 21 and the primary-side gate 23 portion of the primary-side runner 22 are separated from the primary-side fixed side K. At this time, the runner 22 is removed by a runner take-out machine or dropped automatically. Next, the primary side molded product D moves to the core pin 16 side of the movable side M and moves to the molding process of the secondary side molded product G.

前記の成形工程において、１次側成形品Ｄが、１次側固定側Ｋから離間される際、中空状態の薄肉になるため、前記の離間抵抗で変形しようとする作用が発生する。そこで、薄肉で形成された前記１次側成形品Ｄの強度を確保する必要があるが、本実施例では強度を確保するために橋脚溝２８Ａを形成している（図７、図８、図１１〜図１４参照）。
この橋脚溝２８Ａを１次側先ピン１３に形成よって、１次側成形品には橋脚２８が成形（形成）される。以下、その橋脚２８について詳述する。
把持部品の完成品４３の１次側成形品Ｄを、図１１〜図１３に示し説明する。
本例においては、連通孔２９が数箇所にわたり形成されている。よって、外層である１次側成形品Ｄは、強度が若干ではあるが弱くなっている。よって、前記１次側固定側Ｋの１次側先ピン１３及び１次側キャビティー１２から１次側成形品Ｄが離間する際の離間の抵抗、及び、１次側成形品Ｄからゲ−ト２３が切断される時の切断力で、その１次側成形品Ｄが変形してしまう危険性がある。
また、前記１次側成形樹脂Ｅを充填し１次側成形品Ｄを成形後、成形機で型開きし、この１次側成形品Ｄは可動側Ｍ側であるコアピン１６に係着された様態で、可動側Ｍ方向へ移動する。
更に、前記成形機の可動側が回転或いは、スライドして移動することで可動側Ｍは２次成形側へと移動する。つまり、前記２次側成形品Ｆを成形する側に移動するのである。
前記２次側固定側Ｎの金型は、２次側先ピン１８と２次側キャビティー１９を具備している。その２次側の固定側Ｎに前記１次側成形品Ｄが挿嵌される。しかし、この時、１次側成形品Ｄの成形状態が悪く変形していた場合には、型締めの最中に意図しない部分を挟み込んでしまい、その結果、２次側固定側Ｎが破損してしまう危険性がある。これらの危険性を避けるために、本実施例においては、橋脚を設けている。
その橋脚２８の具体的な形体を以下に示す。前記１次側成形品Ｄ自体の強度と剛性を保持するために、１次側成形品Ｄの橋脚２８を１次側成形品Ｄの隣り合う連通孔２９間に形成している。
しかし、橋脚２８は、内層の前記柔らかい方の２次側成形樹脂Ｇのクション性を損ねる可能性がある。そこで、本実施例においては、橋脚２８の肉厚Ｓは、内層の２次側成形樹脂Ｇのクション性を損ねない硬さを確保するために０．４ミリ≦肉厚Ｓ≦１．５ミリに設定している。尚、使用する材料の硬度、クッション性によって、橋脚２８の構成数は、連通孔２９の間隔に合わせて適宜設定が可能である。
尚、前記１次側成形品Ｄの外層の肉厚Ｔが薄いと剛性が少なくなり強度も不足し、前記の問題が発せする危険性がある。また、内層である２次側成形樹脂Ｇの充填圧力によっても前記の問題が発生してしまう危険性がある。これらを考慮すると、前記筒状把持部品の完成品４３の表面Ｐを把持した際、内層の前記柔らかい方２次側成形樹脂Ｇのクション性を損ねない硬さを確保するために、外層となる１次側成形品Ｆの肉厚Ｔを、０．５ミリ≦肉厚Ｔ≦２．０ミリに設定するのが好ましい。 In the molding step, when the primary-side molded product D is separated from the primary-side fixed side K, it becomes hollow and thin, so that an action of deforming with the separation resistance occurs. Therefore, it is necessary to secure the strength of the primary side molded product D formed of a thin wall, but in this embodiment, the pier groove 28A is formed in order to secure the strength (FIGS. 7, 8, and FIG. 11 to 14).
By forming the pier groove 28A in the primary side tip pin 13, the pier 28 is formed (formed) in the primary side molded product. Hereinafter, the pier 28 will be described in detail.
The primary side molded product D of the gripped part finished product 43 will be described with reference to FIGS.
In this example, communication holes 29 are formed at several locations. Therefore, the primary side molded product D which is the outer layer is weak although its strength is slight. Therefore, the separation resistance when the primary side molded product D is separated from the primary side tip pin 13 and the primary side cavity 12 of the primary side fixed side K, and the primary side molded product D to the gate. There is a risk that the primary side molded product D is deformed by the cutting force when the groove 23 is cut.
Further, after filling the primary side molding resin E and molding the primary side molded product D, the mold was opened by a molding machine, and the primary side molded product D was engaged with the core pin 16 on the movable side M side. In a manner, it moves in the direction of the movable side M.
Further, when the movable side of the molding machine rotates or slides and moves, the movable side M moves to the secondary molding side. That is, the secondary side molded product F is moved to the side to be molded.
The mold on the secondary fixed side N includes a secondary tip pin 18 and a secondary cavity 19. The primary side molded product D is inserted into the fixed side N on the secondary side. However, at this time, when the molding state of the primary side molded product D is poorly deformed, an unintended portion is caught during mold clamping, and as a result, the secondary side fixed side N is damaged. There is a risk that In order to avoid these dangers, a pier is provided in the present embodiment.
The specific form of the pier 28 is shown below. In order to maintain the strength and rigidity of the primary side molded product D itself, the bridge pier 28 of the primary side molded product D is formed between the adjacent communicating holes 29 of the primary side molded product D.
However, the pier 28 may impair the action property of the soft secondary side molding resin G of the inner layer. Therefore, in the present embodiment, the thickness S of the bridge pier 28 is 0.4 mm ≦ thickness S ≦ 1.5 mm in order to ensure hardness that does not impair the action properties of the secondary side molding resin G of the inner layer. Is set. Depending on the hardness and cushioning properties of the materials used, the number of piers 28 can be set as appropriate according to the interval between the communication holes 29.
In addition, if the thickness T of the outer layer of the primary-side molded product D is thin, the rigidity is reduced and the strength is insufficient, and there is a risk that the above-described problem occurs. Further, there is a risk that the above-described problem may occur due to the filling pressure of the secondary side molding resin G that is the inner layer. In consideration of these, when the surface P of the finished product 43 of the cylindrical gripping part is gripped, the outer layer becomes an outer layer in order to ensure the hardness that does not impair the action property of the softer secondary side molding resin G of the inner layer. It is preferable to set the thickness T of the primary side molded product F to 0.5 mm ≦ thickness T ≦ 2.0 mm.

１次側成形品Ｄの成形後の動作を図１０と図１１〜図１３に示し説明する。異材質成形の場合、通常、１次側成形品Ｄが成形された後、この１次側成形品Ｄは前記コアピン１６から離間することなく、また、コアピン１６の係着位置を変えることなく、成形機に設定された可動側型開き限界位置まで移動する。しかし、前述もしたように、１次側成形品Ｄから１次側の固定側Ｋの１次側先ピン１３及び、１次側キャビティー１２が離間する際の離間の抵抗、及び、ゲ−ト２３が切断される時の切断力に負け、１次側成形品Ｄが１次側の固定側Ｋに残るか或いは、金型開き途中で落下してしまう危険性がある。そこで、１次成形品Ｄの脱落を防止するために、前記コアピン１６にアンダ−カットである係着溝２５Ａを形成している。ちなみに、本実施例では、前記係着溝２５Ａの深さを０．６ミリに、また、幅を２．５ミリのリング状に形成することによって、コアピン１６にアンダ−カット（係着溝２５Ａ）を形成した。尚、この係着溝２５Ａは、図１３で示す１次側成形品Ｄ部の区間（基礎２７Ａ）の肉厚Ｗの範囲に形成されている。
しかし、この基礎２７が脆弱であると、１次側成形品Ｄの係着リブ２５が確実な係着力を発揮しないこともある。よって、本実施例では確実性を得るために、前記１次側成形品Ｆのみで形成した部分に基礎２７を設け、更に、前記基礎２７の肉厚Ｗを０．６ミリ以上に設定している。尚、前記アンダーカットである係着溝２５Ａは、ディンプル状や軸長方向の長溝、或いは、部分的なアンダ−カット溝として形成しても良い。 The operation after the molding of the primary side molded product D will be described with reference to FIGS. 10 and 11 to 13. In the case of different material molding, normally, after the primary side molded product D is molded, the primary side molded product D is not separated from the core pin 16, and the engaging position of the core pin 16 is not changed. Move to the movable mold opening limit position set in the molding machine. However, as described above, when the primary side tip pin 13 on the primary side fixed side K and the primary side cavity 12 are separated from the primary side molded product D, the resistance of separation and the gate There is a risk that the primary side molded product D may remain on the primary side fixed side K or fall in the middle of the mold opening while losing the cutting force when the groove 23 is cut. Therefore, in order to prevent the primary molded product D from falling off, an engagement groove 25 </ b> A that is an undercut is formed in the core pin 16. Incidentally, in the present embodiment, the engaging groove 25A is formed in a ring shape having a depth of 0.6 mm and a width of 2.5 mm, so that the core pin 16 is undercut (an engaging groove 25A). ) Was formed. The engaging groove 25A is formed in the range of the thickness W of the section (base 27A) of the primary side molded product D portion shown in FIG.
However, if the foundation 27 is fragile, the engaging rib 25 of the primary side molded product D may not exhibit a reliable engaging force. Therefore, in this embodiment, in order to obtain certainty, the foundation 27 is provided in the portion formed only by the primary side molded product F, and the thickness W of the foundation 27 is set to 0.6 mm or more. Yes. The engaging groove 25A which is the undercut may be formed as a dimple shape, a long groove in the axial direction, or a partial undercut groove.

次に、１次側成形品Ｄが１次側固定側Ｋから離間された後、コアピン１６に係着固定された状態で２次側固定側Ｎに移動している状態を図１５〜図１８に示し説明する。つまり、前記２次側成形品Ｆの成形工程である。 Next, after the primary side molded product D is separated from the primary side fixed side K, it is moved to the secondary side fixed side N in a state of being fastened and fixed to the core pin 16 with reference to FIGS. It will be described in the following. That is, it is a molding process of the secondary side molded product F.

１次側成形品Ｄがコアピン１６に係着固定されたままの状態で、２次側固定側Ｎ位置決めされ型締めされる工程である。成形機の型締めにより、前記２次側先ピン１８と２次側キャビティー１９及び、２次側キャビティー１９に、前記凸部２６並びに凸部２６Ａを形成した部分と合致する位置に凹部３１が形成されている。つまり、前記２次側固定側Ｎに具備された２次側先ピン１８と凹部３１を形成した２次側キャビティー１９及び、前記コアピン１６に係着固定されたままの１次側成形品Ｄとで２次側閉鎖密閉空間３０が形成されるが、成形機の型締めによって形成される。また、その２次側閉鎖密閉空間３０は、２次側キャビティー１９の凹部３１と１次側成形品Ｄに構成された連通項２９及び、２次側先ピン１８と１次側成形品Ｄの内面で形成された空間をなしており袋状３２となっている。前記２次側閉鎖密閉空間３０は、２層の把持部品の完成品４３の内層である柔らかい方の２次側成形樹脂Ｇを充填流入させる空間である。 This is a process in which the secondary side fixed side N is positioned and clamped in a state where the primary side molded product D remains fixed to the core pin 16. Due to the mold clamping of the molding machine, the concave portion 31 is located at a position that coincides with the portion where the convex portion 26 and the convex portion 26A are formed in the secondary side tip pin 18, the secondary side cavity 19, and the secondary side cavity 19. Is formed. That is, the secondary side cavity pin 19 formed with the secondary side tip pin 18 and the recess 31 provided on the secondary side fixed side N, and the primary side molded product D that is fixedly fastened to the core pin 16. And the secondary side closed sealed space 30 is formed by mold clamping of the molding machine. Further, the secondary side closed sealed space 30 has a communication term 29 formed in the concave portion 31 of the secondary side cavity 19 and the primary side molded product D, and the secondary side tip pin 18 and the primary side molded product D. Forming a bag-like shape 32. The secondary side closed sealed space 30 is a space into which the soft secondary side molding resin G, which is the inner layer of the finished product 43 of the two layers of gripping parts, is filled.

前記１次側成形品Ｄの橋脚２８の更なる作用を図１８を基に説明する。前記橋脚２８は、外層である１次側成形品Ｄの橋脚２８として具備されている。この橋脚２８は、２次側成形品Ｆを成形する目的で、成形機により２次側固定側Ｎに型締めされる。２次側固定Ｎには、１次側先ピン１３に橋脚溝２８Ａを形成した溝底内接径と同等の径を袋状３２に有する２次側先ピン１８が配置されている。その溝底内接径を有する２次側先ピン１８について説明する。
複数の橋脚２８から形成されているが、隣り合う橋脚２８間を溝としこの溝の軸円中心側に最も近い面を溝底とする。この溝底の面を内接円で結んだものを内接径１８Ａとする。つまり、前記１次側先ピン１３の内接径１８Ａを有する２次側先ピン１８を、２次側固定側Ｎに有している。２次側固定側Ｎに具備された内接径１８Ａを有する２次側先ピン１８が、図１８で示すように１次側成形品Ｄの橋脚２８の内接径中心側に貫入される。ここでは、内接径中心側を内接径とする。尚、２次側先ピン１８は、前記コアピン１６と当接する面側を２次側先ピン１８の先端側に有している。具体的には、前記２次側先ピン１８の先端側を若干細くし傾斜角度を設けてテ−パ形状としており、２次側先ピン１８を橋脚２８の内接径１８Ａよりも０．０３ミリ以上大きく設定している。
前記テ−パ形状の施された２次側先ピン１８が成形機の型締めにより、前記１次側成形品Ｄに貫入することで、くさび効果を発揮し、強固な橋脚２８が更に押圧力２０を発生させ、この橋脚２８を介して、１次側成形品Ｄが２次側キャビティー１９側へと押圧され、１次側成形品Ｄと２次側キャビティー１９と、そこに形成された凹部３１が強固に密着することで完全な２次側閉鎖密閉空間３０を形成することができる。尚、図１３で示す橋脚２８の長さＶは、２次側先ピン１８の挿嵌方向に対し同等であるが、これに限定されることなく適宜設定が可能である。 Further actions of the pier 28 of the primary molded product D will be described with reference to FIG. The said pier 28 is comprised as the pier 28 of the primary side molded product D which is an outer layer. The pier 28 is clamped to the secondary fixed side N by a molding machine for the purpose of molding the secondary side molded product F. In the secondary side fixing N, a secondary side tip pin 18 having a diameter equivalent to the groove bottom inscribed diameter in which the pier groove 28A is formed in the primary side tip pin 13 in the bag shape 32 is disposed. The secondary side tip pin 18 having the groove bottom inscribed diameter will be described.
It is formed from a plurality of piers 28, and a space between adjacent piers 28 is defined as a groove, and a surface closest to the axial circle center side of the groove is defined as a groove bottom. An inscribed diameter 18A is obtained by connecting the groove bottom surfaces with an inscribed circle. That is, the secondary side tip pin 18 having the inscribed diameter 18A of the primary side tip pin 13 is provided on the secondary side fixed side N. The secondary side tip pin 18 having an inscribed diameter 18A provided on the secondary side fixed side N is inserted into the inscribed diameter center side of the pier 28 of the primary side molded product D as shown in FIG. Here, the inscribed diameter center side is defined as the inscribed diameter. The secondary side tip pin 18 has a surface side in contact with the core pin 16 on the tip side of the secondary side tip pin 18. Specifically, the tip end side of the secondary side tip pin 18 is slightly narrowed to form a taper shape with an inclination angle, and the secondary side tip pin 18 is 0.03 smaller than the inscribed diameter 18A of the pier 28. It is set larger than millimeters.
The taper-shaped secondary-side tip pin 18 penetrates the primary-side molded product D by clamping the molding machine, thereby exhibiting a wedge effect, and the strong pier 28 is further pressed. 20, and the primary side molded product D is pressed toward the secondary cavity 19 through the bridge pier 28, and the primary side molded product D and the secondary side cavity 19 are formed there. When the concave portion 31 is firmly adhered, a complete secondary side closed sealed space 30 can be formed. The length V of the pier 28 shown in FIG. 13 is equivalent to the insertion direction of the secondary side tip pin 18, but is not limited to this and can be set as appropriate.

前記内層である柔らかい方の２次側成形樹脂Ｇを充填流入した形体を図１９〜図２１に示し説明する。前記２次側成形品Ｇは、２次側スプルー３４から２次側ランナー３５を連通し、２次側ゲ−ト３６を介して、２次側先ピン１８と２次側キャビティー１９及び、２次側キャビティー１９に形成された凹部３１が、コアピン１６に係着された、１次側成形品Ｄである１次側成形樹脂Ｅに、２次側成形樹脂Ｇを充填流入させ溶融結合し一体化させている。 The shape filled with the soft secondary side molding resin G, which is the inner layer, will be described with reference to FIGS. The secondary side molded product G communicates with the secondary side runner 35 from the secondary side sprue 34, and via the secondary side gate 36, the secondary side tip pin 18, the secondary side cavity 19, and The concave portion 31 formed in the secondary cavity 19 is melt-bonded by filling and flowing the secondary molding resin G into the primary molding resin E, which is the primary molding D connected to the core pin 16. And integrated.

前記２次側閉鎖密閉空間３０に内層である２次側成形樹脂Ｇが充填流入される工程を図１９〜図２１に示し説明する。２次側閉鎖密閉空間３０を形成する１要素である外層の１次側成形品Ｄには、前記連通孔２９が数箇所にわたり形成されている。したがって、１次側成形品Ｄの連通孔２９付近は、若干脆弱になっている。この脆弱な部分に内層となる２次側成形樹脂Ｇが充填流入されると、充填圧力により２次側閉鎖密閉空間３０の外に流出する可能性がある。そこで、前記１次側成形品Ｄに形成された連通孔２９の近傍に、前記橋脚２８を配置している。そして、その橋脚２８によって、１次側成形品Ｄを強固に保持する作用が発生し、確実に２次側閉鎖密閉空間３０を確保することができるものとなる。ちなみに、本実施例においては、前記橋脚２８の肉厚Ｓを０．４ミリ≦Ｓ≦１．４ミリとして、本数は前記連通孔２９の区間に６箇所設けているが、２〜１０箇所と適宜の設定が可能である。 A process of filling and flowing the secondary side molding resin G as the inner layer into the secondary side closed sealed space 30 will be described with reference to FIGS. The communication hole 29 is formed in several places in the outer layer primary side molded product D which is one element forming the secondary side closed sealed space 30. Accordingly, the vicinity of the communication hole 29 of the primary side molded product D is slightly fragile. When the secondary side molding resin G, which is the inner layer, is filled and flowed into this fragile portion, there is a possibility that it will flow out of the secondary side closed sealed space 30 due to the filling pressure. Therefore, the pier 28 is arranged in the vicinity of the communication hole 29 formed in the primary side molded product D. And the effect | action which hold | maintains the primary side molded article D firmly generate | occur | produces with the pier 28, and the secondary side closed sealed space 30 can be ensured reliably. Incidentally, in this embodiment, the thickness S of the pier 28 is set to 0.4 mm ≦ S ≦ 1.4 mm, and the number of the six piers 28 is provided in the section of the communication hole 29. Appropriate settings are possible.

前記外層である１次側成形品Ｄの内側には、前記２次側閉鎖密閉空間３０で形成された袋状３２が形成されている（図１８参照）。その袋状３２にも２次側成形樹脂Ｇが充填流入される（図２１参照）前記２次側の固定側Ｎに、１次側成形品Ｄがコアピン１６に係着された状態で成形機によって型締めされている。前記成形機から充填流入された２次側成形樹脂Ｇは、２次側スプルー３４と２次側ランナー３５で連通する空間を通り、２次側先ピン１８と２次側キャビティー１９間で形成された前記袋状３２の開口部である２次側ゲ−ト３６から充填流入される。
この時、２次側成形樹脂Ｇが前記２次側閉鎖密閉空間３０である空間の外に流出してはならない。前記外層の硬い弾性体（１次側成形樹脂Ｅ）と２次コア（２次側先ピン１８）の間に２次側ゲ−ト３６を形成している。つまり、前記外層である１次側成形品Ｄと前記２次側先ピン１８との区間３２Ａ、即ち、２次側成形樹脂Ｇが充填流入する前記袋状３２の空間に、前記２次側ゲ−ト３６を配置している。前記区間３２Ａに前記２次側ゲ−ト３６を形成することで、的確に前記袋状３２の開口部である２次側ゲ−ト３６を設定できる。
また、前記２次側ゲ−ト３６を同一円周上に数点にわたり設けることで、斑なく２次側成形樹脂Ｇを充填流入することができると共に、流入充填された２次側成形樹脂Ｇが、外層である１次側成形樹脂Ｅの内側に、２次側ゲ−ト３６設定することで確実に充填される。更に、２次効果として、前記２次側ゲ−ト３６の位置が確実に２次側成形品Ｆ部の区間３２Ａ内に設定されることで、２次側成形樹脂Ｇの流入を阻害する抵抗物がなくなる。したがって、前記２次側成形樹脂Ｇの２次側閉鎖密閉空間３０への充填流入する抵抗は軽減され充填流入が容易になり、その結果、２次側成形樹脂Ｇを充填流入させるための、成形機の射出充填圧力も低く抑えられることになる。また、前記２次側閉鎖密閉空間３０の一部を形成する、１次側成形樹脂Ｅへの負担も軽減し、充填圧力における変形や破損を招くこともない。
更に、３次効果も奏する。前記２次側ゲ−ト３６の位置が確実に前記２次側成形品Ｆ部である区間３２Ａに設定されることで、２次側ゲ−ト３６から２次側成形樹脂Ｇが充填流入する際、その２次側成形樹脂Ｇは前記袋状３２内を軸長方向へ直線的に充填流入される。その後、その樹脂の内圧３７は１次側成形品Ｄの内側から、２次側キャビティー１９側へと掛り、１次側成形品Ｆは、前記２次側キャビティー１９に押圧されることになる。その結果、前記外層である１次側成形品Ｆを均一に２次側キャビティー１９へと張り広げる作用が発生し、その作用が外層である１次側成形品Ｆの弛み及び皺を軽減することになり、外観表面Ｐが綺麗に仕上げられる。
ここで、前記２次側ゲ−ト３６について説明する。前記袋状３２の肉厚３２Ａ部には、前記２次側成形樹脂Ｇの充填流入を阻害する抵抗物になり得る１次側成形品Ｄの橋脚２８が対峙している。そこで、前記１次側成形品Ｄの橋脚２８を避けた位置に前記２次側ゲ−ト３６を配置している。また、前記２次側ゲ−ト３６は、把持部品の完成品４３である軸状の長手方向に向わせ、前記２次側成形樹脂Ｇの充填流入の開口部に配置されている。これらの構成により、流入抵抗が少くスム−スに充填される。
以上の構成から、前記外層である１次側成形樹脂Ｅと、内層である２次側成形樹脂Ｇの混濁の少ない均一な２層が形成され、且つ、前記１次側成形品Ｄの外観表皮Ｐ部に２次側成形樹脂Ｇが洩れ出さず、外観及び握る心地を損ねることのない最良の把持部品の完成品４３を成形することができる。 A bag-like shape 32 formed by the secondary side closed sealed space 30 is formed inside the primary side molded product D which is the outer layer (see FIG. 18). The secondary molding resin G is also filled and introduced into the bag 32 (see FIG. 21). The molding machine with the primary molded product D engaged with the core pin 16 on the secondary fixed side N. It is clamped by. The secondary molding resin G filled and inflowed from the molding machine is formed between the secondary tip pin 18 and the secondary cavity 19 through a space communicating with the secondary sprue 34 and the secondary runner 35. It is filled and introduced from the secondary side gate 36 which is the opening of the bag-like 32 made.
At this time, the secondary side molding resin G must not flow out of the space which is the secondary side closed sealed space 30. A secondary side gate 36 is formed between the hard elastic body (primary side molding resin E) of the outer layer and the secondary core (secondary side tip pin 18). That is, in the section 32A between the primary side molded product D as the outer layer and the secondary side tip pin 18, that is, in the space of the bag 32 where the secondary side molding resin G is filled and flows, -G 36 is arranged. By forming the secondary side gate 36 in the section 32A, the secondary side gate 36 that is the opening portion of the bag-like 32 can be accurately set.
Further, by providing the secondary side gate 36 over several points on the same circumference, the secondary side molding resin G can be filled and flowed in without any unevenness, and the filled and filled secondary side molding resin G can be obtained. However, the secondary side gate 36 is set on the inner side of the primary side molding resin E which is the outer layer, so that it is reliably filled. Further, as a secondary effect, the position of the secondary side gate 36 is surely set in the section 32A of the secondary side molded product F part, thereby preventing the inflow of the secondary side molding resin G. Things disappear. Therefore, the resistance of the secondary side molding resin G filling and flowing into the secondary side closed sealed space 30 is reduced, and the filling inflow is facilitated. As a result, the molding for filling and injecting the secondary side molding resin G The injection filling pressure of the machine can be kept low. Further, the burden on the primary side molding resin E that forms a part of the secondary side closed sealed space 30 is reduced, and deformation or breakage in the filling pressure is not caused.
Further, there is a tertiary effect. By ensuring that the position of the secondary side gate 36 is set in the section 32A which is the secondary side molded product F portion, the secondary side molding resin G is filled and flows from the secondary side gate 36. At this time, the secondary molding resin G is filled and flowed linearly in the axial direction in the bag shape 32. Thereafter, the internal pressure 37 of the resin is applied from the inner side of the primary side molded product D to the secondary side cavity 19 side, and the primary side molded product F is pressed by the secondary side cavity 19. Become. As a result, an action of uniformly spreading the primary side molded product F, which is the outer layer, to the secondary side cavity 19 occurs, and this action reduces slack and wrinkles of the primary side molded product F, which is the outer layer. As a result, the appearance surface P is finished beautifully.
Here, the secondary side gate 36 will be described. The pier 28 of the primary side molded product D, which can be a resistor that obstructs the filling and inflow of the secondary side molding resin G, is opposed to the wall portion 32A of the bag 32. Therefore, the secondary side gate 36 is arranged at a position avoiding the pier 28 of the primary side molded product D. Further, the secondary side gate 36 is arranged in the opening of the filling and inflow of the secondary side molding resin G so as to face the longitudinal direction of the shaft which is the finished product 43 of the gripping part. With these configurations, the inflow resistance is small and the filling is smooth.
From the above configuration, a uniform two layer with less turbidity is formed between the primary molding resin E which is the outer layer and the secondary molding resin G which is the inner layer, and the outer appearance skin of the primary molding D The secondary side molding resin G does not leak into the P portion, and the finished product 43 of the best gripping part without impairing the appearance and gripping feeling can be molded.

前記２次側閉鎖密閉空間３０である袋状３２を形成する金型装置であるが、前記袋状３２に２次側成形樹脂Ｇが成形機により充填流入されることで、成形ガス３８が発生する。その成形ガス３８とは、前記２次側成形樹脂Ｇの溶融で発生するガス並びに、袋状３２に２次側成形樹脂Ｇが充填流入される前の袋状３２の空間に存在していた空気のことである。前記成形ガス３８は、袋状３２から、確実に金型外へ排出されることが必要であるが、確実に排出されない場合もある。そのとき、成形ガス３８は、袋状３２へ充填流入される２次側成形樹脂Ｇの射出充填圧力により、袋状３２内で圧縮されることになる。
その圧縮された成形ガス３８は、液状油脂物となり完成品４３の袋状３２内に堆積する。また、経時により液状油脂物は、完成品４３の内外面に流出する場合もある。その結果、完成品４３の劣化及び、表皮Ｐにぬめりやべたつきが発生し、把持部が滑り易くなってしまうばかりでなく、完成品４３としての機能を著しく阻害してしまっていた。この問題を、一般的には、ガス抜け不良または、ガス焼け不良と称している。しかし、前記外層を硬い方の１次側成形樹脂Ｅを成形することは容易であるが、その外層の内側に２次側成形樹脂Ｇを均一な層として充填する金型装置においては、未だ開発の余地があった。
尚、前記ガス抜け不良を誘発する原因としては、成形機の型締めによりコアピン１６と２次側先ピン１８が当接することで、前記２次側閉鎖密閉空間３０である袋状３２の一部を形成し２次側成形樹脂Ｇの流れを遮断し樹脂洩れを防止しているためと考えられる（図２２、図２３参照）。
ここで、前記ガス抜け不良の解決手段について詳細に説明する。本実施例は、前記エア−ベントを２次コアと可動側コアの当接面に形成すると共に、２次コア或いは、可動側コアに貫通孔を形成し、前記エア−ベントと連通させている。ちなみに、本実施例においては、前記エア−ベントを２次側成形樹脂Ｇが洩れない程度の適宜な空隙、具体的には、深さを０．０１ミリ〜０．０３ミリとし、ベント溝（エアーベント）３９を形成している。また、前記２次側先ピン１８と前記コアピン１６が型締めにより当接（当接面）させ、前記２次側先ピン１８に貫通孔１４Ｂを形成しているが、コアピン１６に貫通孔１７を形成しても良い。前記ベント溝３９は、２次側先ピン１８のガスベントである貫通孔１４Ｂ、或いは、前記コアピン１６のガスベントである前記貫通孔１７と連通しおり、更に大気中とも連通している。本実施例では、前記コアピン１６の当接面に縦、横方向の十文字形状の深さ０．０１５ミリで幅２ミリのベント溝３９を形成している。また、前記コアピン１６の貫通孔１７は、径が３．０ミリとなっており、前記ベント溝３９と連通したコアピン１６に形成したガスベント溝４０は、深さが０．２ミリ、幅が１．２ミリとなっている。
更に、前記当接面に形成された前記エア−ベントと連通する、前記２次側先ピン１８に形成された中心合わせ部１８Ｂ或いは、前記コアピン１６に形成された中心合わせ部１６Ａ（参照図２２）のどちらか一方にガスベント溝４０を形成する。更に、前記ガスベント溝４０と連通する２次側先ピン１８の貫通孔１４Ｂ、或いは、コアピン１６の貫通孔１７の少なくとも１方を、完成品４３の干渉しない部位に形成している。更に、前記２次側先ピン１８の貫通孔１４Ｂと連通する２次側先ピン押え板１Ｂの近傍から大気中へ連通する連通孔や連通溝を形成している。或いは、前記コアピン１６の貫通孔１７と連通するコアピン押え板７の近傍から大気中へ連通する連通孔や連通溝を形成しても良いし、前記コアピン１６の貫通孔１７を、２次側割型押え板４Ｂの近傍に横穴連通孔として形成しても良い。したがって、前記２次側割型押え板４Ｂに大気中と連通する連通孔や連通溝を形成することで、コアピン１６の貫通孔１７をコアピン押え板７まで貫通させない構造としている。
つまり、前記コアピン１６の貫通孔１７が、前記連通孔１７の途中で、コアピン１６の軸外径方向へと形成されている。よって、前記コアピン１６には貫通孔１７が形成されない部分が構成されるが、該部分に前記コアピン１６の温調用の冷却孔を形成しても良い。以上の構成により、前記２次側成形樹脂Ｇを２側閉鎖密閉空間３０である袋状３２に充填することで発生する成形ガス３８を、前記エア−ベントから大気中へと連通させた空間４１、或いは、空間４２から効率良く確実に大気中へと放出することができる。その結果、ガス抜け不良が解消され、完成品４３の内外面への液状油脂の流出がなく、滑りが発生しない完成品４３を成形できる。 The mold apparatus forms a bag-like shape 32 which is the secondary-side closed sealed space 30. When the secondary-side molded resin G is filled into the bag-like shape 32 by a molding machine, a molding gas 38 is generated. To do. The molding gas 38 includes the gas generated by the melting of the secondary molding resin G and the air that was present in the bag 32 before the secondary molding resin G was filled and flowed into the bag 32. That is. The molding gas 38 needs to be reliably discharged from the bag 32 to the outside of the mold, but may not be reliably discharged. At that time, the molding gas 38 is compressed in the bag shape 32 by the injection filling pressure of the secondary side molding resin G filled and flowing into the bag shape 32.
The compressed molding gas 38 becomes a liquid oil and fat and accumulates in the bag-like shape 32 of the finished product 43. In addition, the liquid oil or fat may flow out to the inner and outer surfaces of the finished product 43 over time. As a result, the finished product 43 is deteriorated and the skin P is slimmed and sticky, and the gripping portion becomes slippery, and the function of the finished product 43 is remarkably hindered. This problem is generally referred to as outgassing failure or gas burnout failure. However, although it is easy to mold the harder primary side molding resin E on the outer layer, a mold apparatus in which the secondary side molding resin G is filled as a uniform layer inside the outer layer has not yet been developed. There was room for.
In addition, the cause of the gas escape failure is a part of the bag-like shape 32 which is the secondary side closed sealed space 30 by the core pin 16 and the secondary side tip pin 18 coming into contact with each other by clamping of the molding machine. This is thought to be because the flow of the secondary side molding resin G is blocked to prevent resin leakage (see FIGS. 22 and 23).
Here, the means for solving the outgassing defect will be described in detail. In this embodiment, the air-vent is formed on the contact surface between the secondary core and the movable core, and a through hole is formed in the secondary core or the movable core so as to communicate with the air-vent. . By the way, in this embodiment, the air vent is set to an appropriate gap that does not allow the secondary side molded resin G to leak, specifically, the depth is 0.01 mm to 0.03 mm, and the vent groove ( Air vent) 39 is formed. Further, the secondary side tip pin 18 and the core pin 16 are brought into contact (abutment surface) by clamping, and the through hole 14B is formed in the secondary side tip pin 18, but the through hole 17 is formed in the core pin 16. May be formed. The vent groove 39 communicates with the through hole 14B that is a gas vent of the secondary tip 18 or the through hole 17 that is a gas vent of the core pin 16, and further communicates with the atmosphere. In the present embodiment, a vent groove 39 having a depth of 0.015 mm and a width of 2 mm is formed on the contact surface of the core pin 16 in a vertical and horizontal cross-sectional shape. The through-hole 17 of the core pin 16 has a diameter of 3.0 mm, and the gas vent groove 40 formed in the core pin 16 communicating with the vent groove 39 has a depth of 0.2 mm and a width of 1 mm. .2mm.
Further, a centering portion 18B formed on the secondary tip pin 18 or a centering portion 16A formed on the core pin 16 (see FIG. 22) communicates with the air vent formed on the contact surface. The gas vent groove 40 is formed in either one of the above. Further, at least one of the through hole 14B of the secondary side tip pin 18 communicating with the gas vent groove 40 or the through hole 17 of the core pin 16 is formed in a portion where the finished product 43 does not interfere. Further, a communication hole and a communication groove are formed which communicate from the vicinity of the secondary side tip pin presser plate 1B communicating with the through hole 14B of the secondary side tip pin 18 to the atmosphere. Alternatively, a communication hole or a communication groove communicating with the atmosphere from the vicinity of the core pin presser plate 7 communicating with the through hole 17 of the core pin 16 may be formed, and the through hole 17 of the core pin 16 may be formed on the secondary side. You may form as a horizontal hole communicating hole in the vicinity of the mold retainer board 4B. Therefore, the through hole 17 of the core pin 16 is prevented from penetrating to the core pin presser plate 7 by forming a communication hole or a communication groove communicating with the atmosphere in the secondary split type presser plate 4B.
That is, the through-hole 17 of the core pin 16 is formed in the axial direction of the core pin 16 in the middle of the communication hole 17. Therefore, a portion where the through hole 17 is not formed is formed in the core pin 16, but a cooling hole for temperature adjustment of the core pin 16 may be formed in the portion. With the above configuration, the space 41 in which the molding gas 38 generated by filling the secondary molding resin G into the bag-like shape 32 which is the second closed sealed space 30 is communicated from the air vent to the atmosphere. Alternatively, it can be efficiently and reliably discharged from the space 42 into the atmosphere. As a result, it is possible to mold the finished product 43 in which the gas outage defect is eliminated, the liquid oil does not flow out to the inner and outer surfaces of the finished product 43, and no slip occurs.

前記筒状把持部品の完成品４３の取り出し方法について、図２４、図２５に基づいて説明する。前記完成品４３の一部である２次側成形品Ｆの表皮突起３３は、２次側割型押板４Ｂが型開きすることで、アンギュラピン１０Ｂを介し割型スライド１１Ｂがり摺動し、割型スライド１１Ｂ固定されている２次側割型９Ｂと更に、２次側割型９Ｂに固定されている前記２次側キャビティー１９が型開することで、前記２次側キャビティー１９に形成された凹部３１から、離間させられる。それと同時に、完成品４３の２次側成形品Ｆが前記２次側先ピン１８から離間され、コアピン１６に係着された態様で、前記可動側Ｍに移動する。その後、更に、成形機に設定した金型開き限界まで型開することで、ストリッパプレ−ト５が開き、そのストリッパプレ−ト５に固着されたストリッパブッシュ１５を介し、前記コアピン１６から完成品４３が離間され落下する。
その際、前記コアピン１６に形成された係着溝２５Ａによって形成された係着リブ２５を有する完成品４３の２次側成形品Ｇが、２次側の固定側Ｎに構成された２次側キャビティー１９及び２次側先ピン１８から離間される、抵抗よりも強くなるように、前記アンダ−カット（係着溝２５Ａ）が形成されているが、完成品４３でもある前記基礎２７に構成した係着リブ２５が容易に離間されるような形状に形成されている。尚、前記基礎２７部に系着リブ２５を構成することで、コアピン１６に構成する係着溝２５Ａへの係着強度を向上されており、また、前記ストリッパブッシュ１５で完成品４３の基礎２７である離脱面２７Ａを押しても、基礎２７である区間２７Ａの変形や潰れが防止されている。
前記２次側固定側Ｎに残った２次側スプルー２４と２次側ランナー３５及び、ゲート３６は、更に成形機に設定した金型開き限界まで型開することで、２次側固定側型板３Ｂが開き自重で落下するが、取り出し機で取り出しても良い。これで、２次側の成形が完了する。 A method of taking out the finished product 43 of the cylindrical gripping part will be described with reference to FIGS. The skin protrusion 33 of the secondary side molded product F, which is a part of the finished product 43, slides and slides the split mold slide 11B via the angular pin 10B when the secondary split mold pressing plate 4B opens. The secondary side split mold 9B fixed to the split mold slide 11B and the secondary side cavity 19 fixed to the secondary side split mold 9B are opened, so that the secondary side cavity 19 It is separated from the formed recess 31. At the same time, the secondary side molded product F of the finished product 43 is moved away from the secondary side tip pin 18 and moved to the movable side M in a manner of being engaged with the core pin 16. Thereafter, the stripper plate 5 is further opened by opening the mold to the mold opening limit set in the molding machine, and the finished product is released from the core pin 16 via the stripper bush 15 fixed to the stripper plate 5. 43 is separated and falls.
At that time, the secondary side molded product G of the finished product 43 having the engagement rib 25 formed by the engagement groove 25A formed in the core pin 16 is formed on the secondary side fixed side N. The undercut (engagement groove 25A) is formed so as to be stronger than the resistance, which is separated from the cavity 19 and the secondary side tip pin 18, but is configured in the base 27 which is also a finished product 43. The engaging ribs 25 are formed so as to be easily separated. In addition, by forming the system attachment rib 25 in the base 27 portion, the engagement strength to the engagement groove 25A formed in the core pin 16 is improved , and the stripper bush 15 is used for the foundation 27 of the finished product 43. Even if the release surface 27A is pressed, the deformation and crushing of the section 27A, which is the foundation 27, are prevented.
The secondary side sprue 24, the secondary side runner 35, and the gate 36 remaining on the secondary side fixed side N are further opened to the mold opening limit set in the molding machine, so that the secondary side fixed side mold The plate 3B opens and falls by its own weight, but may be taken out by a take-out machine. This completes the molding on the secondary side.

前記成形が完了後、前記可動側Ｍは、成形機により、１次側固定側Ｋへと移動し型締めされ、前記１次側成形品Ｄである完成品４３の外層である１次側成形樹脂Ｅを成形する工程へと再び移る。この成形サイクルを繰る返すことで、成形機による多層の筒状把持部品の完成品４３が容易に連続成形できる。 After the molding is completed, the movable side M is moved to the primary side fixed side K by the molding machine and clamped, and the primary side molding that is the outer layer of the finished product 43 that is the primary side molded product D. The process moves again to the step of molding the resin E. By repeating this molding cycle, the finished product 43 of the multilayer cylindrical gripping part by the molding machine can be easily and continuously molded.

前記筒状把持部品の完成品４３の構成を図２６〜図２８に示す。２層の筒状把持部品の完成品４３である。前記外層の硬い方の１次側成形樹脂Ｄに貫通孔２９が形成されており、その貫通孔２９の内面に内層の軟らかい方２次側成形樹脂Ｇを成形しているが、それら外層と内層は連通３３を通し一体化されている。また、前記完成品４３に外層の硬い方の１次側成形樹脂Ｅの表皮の中に、軟らかい方の２次成形樹脂Ｇで形成した前記凸部３３Ｂが混在する表皮Ｐを構成することで、内層の軟らかい方の２次側成形樹脂Ｇの凸部３３Ｂが柔らかく、完成品４３を把持しても滑らない効果が発生する。更に、前記完成品４３の１次側成形品Ｄと２次側成形品が溶融結合した均一な層の２層を成形できる。更に、前記エア−ベントを大気中と連通させた金型構造にすることによって、把持部のべたつきや、ぬめり感を抑えた成形を行うことができる。更に、２層の完成品４３に硬度差を設け、内層を軟らかい方の２次側成形樹脂Ｇで、外側を硬い方の１次側成形樹脂Ｅで成形することによって、互いに溶融結合し、外層と外層が剥がれ難く、また、程好い把持力で変形しクッション性やフイット性に富み、さらに、長時間把持していても疲れ難い製品を提供することができる。更に、２層が強固に前記溶融結合されていることから、後工程の組立ラインでも完成品４３の２層が分離することなく、他部品との組立性の良い完成品４３となっている。 The configuration of the finished product 43 of the cylindrical gripping part is shown in FIGS. This is a finished product 43 of a two-layer cylindrical gripping part. A through hole 29 is formed in the harder primary side molding resin D of the outer layer, and a softer secondary side molding resin G of the inner layer is molded on the inner surface of the through hole 29. Are integrated through a communication 33. Further, in the finished product 43, by forming the skin P in which the convex portion 33B formed of the softer secondary molding resin G is mixed in the outer skin of the primary molding resin E of the harder outer layer, The convex portion 33B of the soft secondary side molding resin G of the inner layer is soft, and an effect of not slipping even when the finished product 43 is gripped occurs. Furthermore, two layers of uniform layers in which the primary side molded product D and the secondary side molded product of the finished product 43 are melt-bonded can be molded. Further, by forming a mold structure in which the air vent is communicated with the atmosphere, it is possible to perform molding while suppressing the stickiness of the gripping portion and the feeling of slimness. Further, the two-layer finished product 43 is provided with a hardness difference, and the inner layer is molded with the softer secondary molding resin G and the outer is molded with the harder primary molding resin E, so that the outer layer is melt-bonded to each other. In addition, the outer layer is difficult to peel off, is deformed with a suitable gripping force, has excellent cushioning and fit properties, and can be provided with a product that does not get tired even when gripped for a long time. Further, since the two layers are firmly melt-bonded, the two layers of the finished product 43 are not separated even in an assembly line in a subsequent process, and the finished product 43 is easily assembled with other parts.

第２次実施例を図２９に示し説明する。前記完成品４３おいて、第１実施例では外層の１次側成形樹脂Ｅを成形後、内層の２次側成形樹脂Ｇを内層に流入させる。また、金型装置おいては、１次側成形品Ｄの連通孔２９と合致した位置に２次側キャビティー１９の凹部３１を形成することで、２次側成形樹脂Ｇを表皮Ｐ部に凸状３３Ｂとして形成している。
しかし、第２次実施例は、前記表皮Ｐに凸状３３Ｂを有していないが、２次側閉鎖密閉空間３０Ａは形成されている。前記２次側成形樹脂Ｇを２次側キャビティー１９の凹部３１のない２次側キャビティー１９Ａに充填流入させているため、前記表皮Ｐには２次側成形樹脂Ｇの凸状３３Ｂは形成されない構成となっている。しかし、前記表皮Ｐの把持部は、１次側成形樹脂Ｅと２次側成形樹脂Ｇが混在している面のため、把持しても滑り難い状態となっている。 A second embodiment will be described with reference to FIG. In the finished product 43, in the first embodiment, after molding the outer side primary molding resin E, the inner side secondary molding resin G is caused to flow into the inner layer. Further, in the mold apparatus, by forming the concave portion 31 of the secondary side cavity 19 at a position matching the communication hole 29 of the primary side molded product D, the secondary side molding resin G is applied to the skin P portion. It is formed as a convex shape 33B.
However, although the secondary embodiment does not have the convex 33B on the skin P, the secondary side closed sealed space 30A is formed. Since the secondary side molding resin G is filled and flowed into the secondary side cavity 19A without the concave portion 31 of the secondary side cavity 19, a convex 33B of the secondary side molding resin G is formed on the skin P. It is the composition which is not done. However, since the gripping portion of the skin P is a surface where the primary side molding resin E and the secondary side molding resin G are mixed, it is difficult to slip even when gripping.

第３次実施例を図３０に示し説明する。第１次実施例では、１次側成形品Ｄを形成する一部分として、１次側先ピン１３と１次側キャビティー１２の内面部の凸部２６が圧嵌し当接することで、１次側成形樹脂Ｅの充填が部分的に遮断阻止され、その結果、連通孔２９が形成されている。
しかし、第３次実施例は、１次側成形品Ｄに連通孔２９を形成しない例である。
前記第１次実施例は、連通孔２９を形成するために、１次側キャビティー１２の内面部に凸部２６を形成しているが、第３次実施例では、１次側キャビティー１２の内面部に凸部２６を形成しない。よって、外層である１次側成形品４４Ａには、１次側成形品Ｄの連通孔２９を形成しない第３実施例は、第１次実施例で示した筒状把持部品の完成品４３の表皮Ｐには、２次側成形樹脂Ｇが露出されていない構成になっている。 A third embodiment will be described with reference to FIG. In the first embodiment, the primary tip pin 13 and the convex portion 26 on the inner surface portion of the primary cavity 12 are press-fitted and contacted as a part of the primary side molded product D, so that the primary side molded product D is in contact with the primary side molded product D. The filling of the side molding resin E is partially blocked and, as a result, the communication hole 29 is formed.
However, the third embodiment is an example in which the communication hole 29 is not formed in the primary side molded product D.
In the first embodiment, the convex portion 26 is formed on the inner surface of the primary cavity 12 in order to form the communication hole 29. In the third embodiment, however, the primary cavity 12 is formed. The convex part 26 is not formed in the inner surface part of this. Therefore, the third embodiment in which the communication hole 29 of the primary side molded product D is not formed in the primary side molded product 44A which is the outer layer is the same as the finished product 43 of the cylindrical gripping part shown in the first embodiment. The skin P is configured such that the secondary molding resin G is not exposed.

第４次実施例を図３１、図３２に示し説明する。第１次実施例では、１次側成形品Ｄの橋脚２８を成形するために、１次側先ピン１３に縦溝２８Ａを形成している。
しかし、第４次実施例では、橋脚２８を１次側成形品Ｄで形成しない。前記１次側先ピン１３の縦溝２８Ａが不要となり、外層である１次側成形品４７には橋脚２８が形成されない（図３１参照）。しかし、本実施例においては、２次コアに縦リブを形成している。以下、その縦リブについて詳述する。２次側先ピン４９には、縦リブ５０が形成されている。その縦リブ５０によって、２次側成形品４８の成形時に、２次側成形樹脂Ｇを充填流入させる空間５１が形成される。その空間５１は、前記縦リブ５０により押圧２０を発生させ、２次側成形品４８である２次側成形樹脂Ｇの充填流入空間を強固な保持空間としている。したがって、第１次実施例の前記１次側成形品Ｄの橋脚２８と、第４実施例の前記２次側先ピン４９の縦リブ５０は、構成は異なるが互いが同等の作用を有している。 A fourth embodiment will be described with reference to FIGS. In the first embodiment, in order to form the pier 28 of the primary side molded product D, the longitudinal groove 28A is formed in the primary side tip pin 13.
However, in the fourth embodiment, the pier 28 is not formed by the primary side molded product D. The longitudinal groove 28A of the primary side tip pin 13 becomes unnecessary, and the pier 28 is not formed on the primary side molded product 47 which is the outer layer (see FIG. 31). However, in this embodiment, vertical ribs are formed on the secondary core. Hereinafter, the vertical rib will be described in detail. A vertical rib 50 is formed on the secondary side tip pin 49. The vertical rib 50 forms a space 51 into which the secondary molding resin G is filled and introduced when the secondary molding 48 is molded. The space 51 generates pressure 20 by the vertical ribs 50, and the filling inflow space of the secondary side molded resin G that is the secondary side molded product 48 is used as a strong holding space. Therefore, although the bridge pier 28 of the primary side molded product D of the first embodiment and the vertical rib 50 of the secondary side tip pin 49 of the fourth embodiment have different configurations, they have the same function. ing.

多色成形の金型装置の概要図。FIG. 2 is a schematic diagram of a multicolor molding die device. 前記金型装置で成形される成形品の模式図。The schematic diagram of the molded article shape | molded by the said metal mold apparatus. 図２の成形品の断面図。Sectional drawing of the molded article of FIG. 図３の断面図。Sectional drawing of FIG. １次側成形の金型装置。Primary side mold equipment. 前記１次側成形の金型装置の断面。Section of the mold apparatus for the primary side molding. １次側先ピン１３の模式図。The schematic diagram of the primary side tip pin 13. FIG. 図６の断面図。Sectional drawing of FIG. 図６の断面図Sectional view of FIG. １次側成形の金型装置の型開図Opening of the mold device for primary molding 図１０の断面図Sectional view of FIG. １次側成形品の模式図Schematic diagram of primary side molded product 図１２の断面図Sectional view of FIG. 図１３の断面図Sectional view of FIG. 可動Ｍ部の構成図Configuration diagram of movable M section ２次側成形金型装置。Secondary side mold apparatus. 図１６の断面図Sectional view of FIG. 図１７の断面図17 is a cross-sectional view of FIG. ２次側成形金型装置による成形工程図Molding process diagram by secondary side mold equipment 図１９の断面図。FIG. 20 is a cross-sectional view of FIG. 19. 図２０の断面図。FIG. 21 is a cross-sectional view of FIG. 20. ２次側成形金型装置の拡大図。The enlarged view of a secondary side molding die apparatus. コアピン１６模式図。The core pin 16 schematic diagram. ２次側成形金型装置の型開図。The mold opening figure of a secondary side molding die apparatus. 図２４の断面図。FIG. 25 is a cross-sectional view of FIG. 24. 把持部品の完成品４３の完成品の模式図。The schematic diagram of the finished product of the finished product 43 of a gripping part. 図２６の断面図。FIG. 27 is a cross-sectional view of FIG. 26. 図２７の断面図。FIG. 28 is a cross-sectional view of FIG. 把持部品の完成品４３の完成品に凸部３３Ｂなしの事例。An example in which the finished product 43 of the gripped part has no protrusion 33B on the finished product. 連通孔２８なしの事例。Example without communication hole 28. 橋脚２８を２次側先ピン４９で代用した事例。An example in which the pier 28 is replaced with a secondary side tip pin 49. ２次側先ピン４９の模式図。The schematic diagram of the secondary side tip pin 49. FIG.

１Ａ１次側先ピン押え板
１Ｂ２次側先ピン押え板
２Ａ１次側先ピンプレート
２Ｂ２次側先ピンプレート
３Ａ１次側型板
３Ｂ２次側型板
４Ａ１次側割型押板
４Ｂ２次側割型押板
５ストリッパプレ−ト
５Ａストリッパプレ−ト
６コアピンプレ−ト
６Ａコアピンプレ−ト
７コアピン押え板
７Ａコアピン押え板
８可動側取付けプレート
８Ａ可動側取付けプレート
９Ａ１次側割型
９Ｂ２次側割型
１０Ａ１次側アンギュラピン
１０Ｂ２次側アンギュラピン
１１Ａ１次側割型スライド
１１Ｂ２次側割型スライド
１２１次側キャビティー
１２Ａ１次側キャビティー（凸部２６を１次側先ピンに形成した場合）
１３１次側先ピン
１３Ａ１次側先ピン（凸部２６を形成した１次側先ピン）
１４Ａ１次側先ピンガスベント
１４Ｂ２次側先ピンガスベント
１５可動側ストリッパブッシュ
１５Ａ可動側ストリッパブッシュ
１６コアピン
１６Ａコアピン
１７コアピン側ガスベント
１７Ａコアピン側ガスベント
１８２次側先ピン
１９２次側キャビティー
１９Ａ２次側キャビティー（凹部のない２次側キャビティー１９）
２０押圧
２１１次側スプルー
２２１次側ランナー
２３１次側ゲ−ト
２４１次側閉鎖密閉空間（１次側成形樹脂の充填空間）
２５係着リブ
２５Ａ係着溝
２６凸部
２６Ａ凸部（凸部２６を１次側先ピンに形成した例）
２７基礎（１次側成形樹脂のみで形成された部分）
２７Ａ基礎の区間
２７Ｂ１次側成形品ストリッパ面
２８橋脚（１次側成形品部で形成された縦リブ）
２８Ａ縦溝（１次側先ピンに形成された溝）
２９連通孔（１次側成形品で形成する内層と外層と表皮をつなぐ連通孔）
３０２次側閉鎖密閉空間（２次側成形樹脂の充填空間）
３１凹部（２次側キャビティー１９の凹部）
３２袋状部（２次側閉鎖密閉空間の一部）
３２Ａ区間（袋状３２の肉厚）
３３連通孔流入樹脂（柔らかい方の２次側成形樹脂）
３３Ｂ凸状（表皮Ｐに凸状に現れた１次側成形樹脂）
３４２次側スプルー
３５２次側ランナー
３６２次側ゲ−ト
３７充填圧力（２次側成形樹脂の充填圧力または、方向）
３８成形ガス
３９ベント溝（ガス逃がし溝）
４０ガスベント溝
４１空間
４２空間
４３筒状把持部品の完成品（多色成形で成形した完成品）
４４１次側キャビティー（連通孔２９形成のための凸部２６がない形体）
４４Ａ１次側成形品（連通孔２９のない形成品）
４５１次側成形品（連通孔流入樹脂３３がなく表皮Ｐに凸部３３Ｂのない形体）
４６２次側成形品（連通孔流入樹脂３３がなく表皮Ｐに凸部３３Ｂのない形体）
４７１次側成形品（１次側成形品部で形成された縦リブのない形体）
４８２次側成形品（２次側先ピン４９と１次側成形品４７で形成した２次側成形品）
４９２次側先ピン（橋脚２８の代用として２次側先ピンに縦リブを形成した一例）
５０２次側先ピンに橋脚２８の代用として形成した縦リブの一例）
５１空間（２次側先ピン４９と１次側成形品４７で形成した２次側成形品空間）
Ｄ１次側成形品（外層であり硬い方の１次側成形樹脂で成形される）
Ｅ１次側成形樹脂（１次側成形品である硬い方の１次側成形樹脂）
Ｆ２次側成形品（主に内層である柔らかい方の２次側成形樹脂で成形される）
Ｇ２次側成形樹脂（２次側成形品である柔らかい方の２次側成形樹脂）
Ｋ１次側固定側（１次固定側の金型装置郡）
Ｍ可動側（可動側の金型装置郡）
ＭＡ可動側（可動側Ｍと同一形体の可動側の金型装置郡）
Ｎ２次側固定側（２次固定側の金型装置郡）
Ｐ表皮（筒状把持部品の完成品４３の把持部表皮）
Ｓ肉厚（橋脚２８の厚さ）
Ｔ肉厚（１次側成形品の肉厚）
Ｖ橋脚２８の長さ
Ｗ肉厚（１次側成形品のみで形成された基礎２７の肉厚） 1A Primary side tip pin presser plate 1B Secondary side tip pin presser plate 2A Primary side tip pin plate 2B Secondary side tip pin plate 3A Primary side die plate 3B Secondary side die plate 4A Primary side split die press plate 4B Secondary split plate 5 Stripper plate 5A Stripper plate 6 Core pin plate 6A Core pin plate 7 Core pin press plate 7A Core pin press plate 8 Movable side mounting plate 8A Movable side mounting plate 9A Primary side split die 9B Secondary-side split mold 10A Primary-side angular pin 10B Secondary-side angular pin 11A Primary-side split-type slide 11B Secondary-side split-type slide 12 Primary-side cavity 12A Primary-side cavity (When formed on the front end pin)
13 Primary side tip pin 13A Primary side tip pin (primary side tip pin in which convex portion 26 is formed)
14A Primary side tip pin gas vent 14B Secondary side tip pin gas vent 15 Movable side stripper bush 15A Movable side stripper bush 16 Core pin 16A Core pin 17 Core pin side gas vent 17A Core pin side gas vent 18 Secondary side tip 19 19 Secondary side cavity 19A 2 Secondary cavity (secondary cavity 19 without recess)
20 Press 21 Primary side sprue 22 Primary side runner 23 Primary side gate 24 Primary side closed sealed space (primary side molding resin filling space)
25 engaging rib 25A engaging groove 26 convex portion 26A convex portion (example in which convex portion 26 is formed on the primary side tip pin)
27 Foundation (part made of primary molding resin only)
27A Base section 27B Primary side molded product stripper surface 28 Bridge pier (longitudinal rib formed by primary side molded product part)
28A Longitudinal groove (groove formed on the primary side tip pin)
29 Communication hole (Communication hole connecting the inner layer, outer layer, and skin formed by the primary side molded product)
30 Secondary side closed sealed space (filling space for secondary side molding resin)
31 recess (recess of secondary cavity 19)
32 Bag-like part (part of secondary closed space)
32A section (bag-like 32 wall thickness)
33 Communication hole inflow resin (soft secondary molding resin)
33B Convex shape (primary molding resin appearing convexly on skin P)
34 Secondary side sprue 35 Secondary side runner 36 Secondary side gate 37 Filling pressure (filling pressure or direction of secondary side molding resin)
38 Molding gas 39 Vent groove (gas escape groove)
40 Gas vent groove 41 Space 42 Space 43 Completed product of cylindrical gripping parts (Completed product formed by multicolor molding)
44 Primary side cavity (form which does not have the convex part 26 for communication hole 29 formation)
44A Primary molded product (formed product without communication hole 29)
45 Primary-side molded product (form without communication hole inflow resin 33 and without protrusion 33B on skin P)
46 Secondary-side molded product (form without communication hole inflow resin 33 and without protrusion 33B on skin P)
47 Primary side molded product (form without vertical ribs formed in the primary side molded product part)
48 Secondary side molded product (secondary side molded product formed by secondary side tip pin 49 and primary side molded product 47)
49 Secondary side tip pin (an example in which vertical ribs are formed on the secondary side tip pin as a substitute for the pier 28)
50 An example of a vertical rib formed as a substitute for the pier 28 on the secondary tip pin)
51 space (secondary molded product space formed by the secondary tip pin 49 and the primary molded product 47)
D Primary side molded product (molded with hard primary side molding resin)
E Primary molding resin (Hard primary molding resin that is the primary molding product)
F Secondary side molded product (Molded mainly from the soft secondary side molding resin that is the inner layer)
G Secondary side molding resin (secondary side molding resin, soft secondary side molding resin)
K primary fixed side (primary fixed side mold equipment group)
M Movable side (movable side mold equipment group)
MA Movable side (movable side mold device group of the same shape as movable side M)
N Secondary side fixed side (secondary fixed side mold equipment group)
P skin (grip part skin of finished product 43 of cylindrical gripping parts)
S Thickness (Thickness of pier 28)
T wall thickness (wall thickness of the primary side molded product)
V Length of bridge pier W Thickness (thickness of foundation 27 formed only by primary side molded product)

Claims

A mold apparatus for forming a gripping member having an outer layer made of a hard elastic body and having an inner layer made of a soft elastic body inside the outer layer, wherein the mold apparatus forms a primary cavity for forming the outer layer. And a secondary side cavity that molds the inner layer, and a primary tip pin that forms a space portion in the outer layer is disposed inside the primary side cavity, while the secondary side cavity The secondary side tip pin which forms a space part in an inner layer is arranged inside, and these primary side cavities and primary side tip pins, and secondary side cavities and secondary side tip pins, respectively, Arranged in the primary fixed side die group and the secondary fixed side die group, the movable side core pin capable of contacting the primary side distal pin and the secondary side distal pin is arranged in the movable side die group. In multi-color molding to mold the gripping member or different material molding Mold equipment.

Characterized in that the outer layer of the convex portion is formed on the inner surface portion of the primary cavity that forms a, and the top portion of the convex portion is brought into contact with the circumferential surface of 1 Tsugigawa destination pin to form the hollow portion to the outer layer A mold apparatus for multicolor molding or different material molding for molding the gripping member according to claim 1 .

The holding member according to claim 1 or 2, wherein a convex portion is formed on the primary side tip pin, and a top portion of the convex portion is brought into contact with an inner surface portion of the primary side cavity. Mold equipment for multicolor molding or molding of different materials.

4. A mold apparatus for multi-color molding or different material molding for molding a gripping member according to claim 1, wherein a longitudinal groove is formed in the primary side tip pin .

The under the movable core pin which faces the 1 Tsugigawa destination pin - multicolor molding or shaping the gripping member according to any one of claims 1 to 4, characterized in that the formation of the cut, different materials Mold equipment in molding.

The outer layer and the gate to the space formed by the movable core pin - multicolor molding or shaping the gripping member according to any one of claims 1 to 5, characterized in that to form the door, different materials Mold equipment in molding.

Air contact surface of the two Tsugigawa destination pin and the movable core pin - to form a vent, said to form a 2 Tsugigawa destination pin or the movable core pin into the through hole, the through hole and the air - and the vent A mold apparatus for multicolor molding or molding of different materials for molding the gripping member according to any one of claims 1 to 6, wherein the mold member is communicated.

To form a longitudinal groove on the 1 Tsugigawa destination pin, and characterized by having a 2 Tsugigawa destination pin having a bag-shaped portion of the same diameter as the groove bottom inscribed diameter of the longitudinal grooves on the secondary side A mold apparatus for multicolor molding or different material molding for molding the gripping member according to any one of claims 1 to 7 .

The inner surface portion of the secondary cavity, any one of claims 1 to 8, characterized in that a recess at a position that matches with the primary-side inner surface portion to form a protrusion in a portion of the cavity A mold apparatus for multicolor molding or molding of different materials for molding the gripping member according to 1.

10. A mold apparatus for multi-color molding or different material molding for molding a gripping member according to claim 1, wherein a vertical rib is formed on the secondary side tip pin .