JPH02273216A - Double molding method and mold structure - Google Patents
Double molding method and mold structureInfo
- Publication number
- JPH02273216A JPH02273216A JP1096083A JP9608389A JPH02273216A JP H02273216 A JPH02273216 A JP H02273216A JP 1096083 A JP1096083 A JP 1096083A JP 9608389 A JP9608389 A JP 9608389A JP H02273216 A JPH02273216 A JP H02273216A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- molded product
- piston member
- combination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000001746 injection moulding Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は二重成形方法およびそれに用いる金型に関し、
さらに、詳しくは第１成形品と第２成形品の接合端部を
強固に結合する二重成形方法およびその方法を実施する
に適する金型構造に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a double molding method and a mold used therein;
More specifically, the present invention relates to a double molding method for firmly joining the joint ends of a first molded product and a second molded product, and a mold structure suitable for carrying out the method.
（従来の技術）
例えば、タイミングギアカバー、シリンダヘッドカバー
、オイルパン等の臼動車部品においては、本体を硬質材
料で成形する一方、シールパツキン部や防音機能部を軟
質材料で構成する必要があるため、雄型と雌型からなり
、いずれか一方を１種類、他方を２種類用意して第１の
型組み合わせにより第１材料を注入成形し、第２の型組
み合わせにより第２材料を第１成形品に重ねて注入成形
する二重成形方法が採用されている。(Prior art) For example, in motor vehicle parts such as timing gear covers, cylinder head covers, oil pans, etc., the main body is molded from a hard material, while the sealing part and soundproof function part need to be made of a soft material. , consisting of a male mold and a female mold, prepare one type of one and two types of the other, injection mold the first material using the first mold combination, and perform the first molding of the second material using the second mold combination. A double molding method is used in which the product is injected over the product.
しかしながら、第１成形品に重ねて第２成形品を注入す
るだけではその接合部の接合強度が弱く、同一系統の材
料を選択するなどの工夫を行っているが、接合強度の向
上には限界があって機械的または構造的噛み合いによる
接合が望まれる。However, simply injecting the second molded product over the first molded product will result in a weak bond at the joint, and efforts such as selecting materials of the same type have been taken, but there is a limit to improving the joint strength. Therefore, joining by mechanical or structural interlocking is desired.
（発明が解決しようとする課題）
そのため、第２材料か第１成形品の接合面に噛み合うよ
うに、接合部の型面をアンダーカットに設計したり、ま
たは第１成形品の接合部に型抜き方向に突起を形成し、
この突起上に第２成形品を成形する等の方法が提案され
ているが、いずれの場合も成形時の型抜きとの関係で型
抜き方向の接合強度の向上には限界があり、充分な接合
強度を得るためには、第１成形品と第２成形品との端部
が嵌合する形態で接合する必要があって、手作業で第１
成形品と第２成形品とを嵌め合わしているのが現状であ
る。(Problem to be Solved by the Invention) Therefore, the mold surface of the joint part is designed to have an undercut so that it meshes with the joint surface of the second material or the first molded product, or the mold surface of the joint part of the first molded product is designed to have an undercut. A protrusion is formed in the pulling direction,
Methods such as molding a second molded product on top of this protrusion have been proposed, but in either case, there is a limit to improving the joint strength in the direction of mold removal due to the relationship with mold removal during molding, and In order to obtain joint strength, it is necessary to join the first molded product and the second molded product in such a way that their ends fit together, and the first molded product must be joined manually.
Currently, the molded product and the second molded product are fitted together.
そこで、本発明は二重成形方法を利用して第１成形品と
第２成形品とがその接合部において嵌合する成形方法お
よびそれに用いる金型を提供することを目的とする。Therefore, an object of the present invention is to provide a molding method in which a first molded product and a second molded product are fitted at their joints using a double molding method, and a mold used therein.
（課題を解決するための手段）
本発明は第１成形品の成形後第１成形品の残る型面を第
２の型組み合わせ時に後退させれば、第２の型組み合わ
せのキャビティに第１成形品の接合端部を上下型面と間
隔をおいて臨ませ、第２材料の上記キャビティへの注入
成形により第２成形品の接合端部が第１成形品の接合端
部に嵌合した形態で接合できることに着目してなされた
もので、雄型と雌型からなり、いずれか一方を１種類、
他方を２種類用意して第１の型組み合わせにより第１材
料を注入成形する第１工程と、第２の型組み合わせによ
り第２材料を第１成形品に重ねて注入成形する第２工程
とからなる二重成形方法において、
上記第２型組み合わせを構成する雄型または雌型の一方
の型の成形面の少な（とも一部を型締方向に移動可能な
ピストン部材の露出面にて構成し、第１工程において、
上記ピストン部材を押すことなく、第１材料を注入成形
し、
第２工程において、上記ピストン部材を押し下げて露出
面を後退させることにより、」二記第１成形品の接合端
部と上記ピストン部材の露出面の間に間隙を形成し、該
間隙にも上記第２材料が至るように注入成形することに
より第２成形品の接合端部が上記第１成形品の接合端部
を包むように成形することを要旨とする二重成形方法に
ある。(Means for Solving the Problems) The present invention provides that, after molding the first molded product, if the remaining mold surface of the first molded product is retracted when the second mold is assembled, the first molding can be applied to the cavity of the second mold combination. The joint end of the second molded product faces the upper and lower mold surfaces at a distance, and the joint end of the second molded product fits into the joint end of the first molded product by injection molding into the cavity. It was created with the focus on the ability to join with each other, and consists of a male type and a female type.
A first step of preparing two types of the other material and injection molding the first material using a first mold combination, and a second step of injection molding the second material overlaid on the first molded product using a second mold combination. In a double molding method, a part of the molding surface of one of the male mold and the female mold constituting the second mold combination is constituted by the exposed surface of a piston member movable in the mold clamping direction. , in the first step,
By injection molding the first material without pressing the piston member, and in the second step, pressing down the piston member to retract the exposed surface, the connecting end of the first molded product and the piston member A gap is formed between the exposed surfaces of the second molded product, and injection molding is performed so that the second material reaches the gap, so that the joint end of the second molded product wraps the joint end of the first molded product. It is a double molding method that aims to
本発明方法において、第２の型組合わせ時に、上記ピス
トン部材を押し下げて露出面を後退させることにより、
上記第１成形品の接合端部を第２の型組み合わせのキャ
ビティにその上下成形面に間隙を置いた状態で臨ませる
には、
第１図〜第５図に示すように、第２の型組合わせのいず
れか一方に、他方の型面を構成するピストン部材に当接
する突起を形成して型締めとともにピストン部材を押圧
して後退させるか、あるいは第６図〜第１２図に示すよ
うに、第１型組み合わせにおいて、第１材料の注入成形
と同時に第２組み合わせにおける上記ピストン部材の露
出面を必要量移動させる捨てボス部材を成形し、上記捨
てボス部材を含む第１成形品を残したまま、上記第２の
型組み合わせを行うようにするのがよい。In the method of the present invention, when the second mold is assembled, by pressing down the piston member and retracting the exposed surface,
In order to allow the joint end of the first molded product to face the cavity of the second mold combination with a gap between the upper and lower molding surfaces, the second mold Either one of the combinations is formed with a protrusion that comes into contact with the piston member constituting the other mold surface, and the piston member is pressed and retreated when the mold is clamped, or as shown in FIGS. 6 to 12. , in the first mold combination, simultaneously with the injection molding of the first material, a sacrificial boss member for moving the exposed surface of the piston member in the second combination by a necessary amount was molded, leaving a first molded product including the sacrificial boss member. It is preferable to perform the second type combination described above.
特に、前者の方法は第２成形品に例えば、配線やケーブ
ルを通して保護するための貫通穴を設ける際に用いられ
、この方法を実施するにあたっては、上記第２の型組み
合わせを構成する雄型または雌型の一方の型の成形面の
少なくとも一部が型締方向に移動可能なピストン部材の
露出面にて構成される一方、他方の型が型締め時に上記
ピストン部材を押圧して後退させる突起を有するように
構成するのがよい。他方、後者の方法は第２成形品に貫
通穴を形成したくない場合、例えば防音機能部を形成す
るときに用いられ、第１材料を注入成形する第１の型組
み合わせには、第１材料の注入成形と同時に下記第２組
み合わせにおける下記ピストン部材の露出面を必要量移
動させる捨てボス部材を成形する成形型面を形成するの
がよい。In particular, the former method is used when providing a through hole in the second molded product, for example, for protection through wiring or cables. At least a part of the molding surface of one of the female molds is constituted by the exposed surface of a piston member that is movable in the mold clamping direction, while the other mold is a projection that presses and retreats the piston member during mold clamping. It is preferable to configure it so that it has the following. On the other hand, the latter method is used when it is not desired to form a through hole in the second molded product, for example when forming a soundproof function part, and the first mold combination for injection molding the first material is At the same time as injection molding, it is preferable to form a mold surface for molding a disposable boss member that moves the exposed surface of the piston member described below in the second combination by a necessary amount.
また、第２材料を第１成形品に重ねて注入成形する第２
の型組み合わせにおいて、上記第２の型組み合わせを構
成する雄型または雌型の一方の型の成形面の少なくとも
一部がその型締時に上記捨てボス部材により型締方向に
移動可能なピストン部材の露出面にて構成されているの
が好ましい。In addition, a second material is injection-molded by overlaying the first molded product.
In the mold combination, at least a part of the molding surface of one of the male mold and the female mold constituting the second mold combination is a piston member movable in the mold clamping direction by the sacrificial boss member when the mold is clamped. Preferably, it is configured with an exposed surface.
第１材料および第２材料は同質系統または異質系統の材
料が支障なく使用することができる。As the first material and the second material, materials of the same type or different types can be used without any problem.
（作用）
本発明によれば、第１成形時に第１成形品とともに捨て
ボス部材を成形するか、第２成形型のピストン部材を有
しない型面に他方の型のピストン部材を押圧する突起を
設け、該突起または捨てボス部材により第２成形型の一
方を後退させ、その接合端部を第２成形時に第２材料が
嵌合状態で注入成形されるようにそのキャビティに臨ま
せるので、二重成形において第１成形品に第２成形品の
接合端部が嵌合した状態で接合できる。(Function) According to the present invention, a waste boss member is molded together with the first molded product during the first molding, or a protrusion that presses the piston member of the other mold is formed on the mold surface of the second mold that does not have the piston member. one of the second molding molds is retracted by the protrusion or sacrificial boss member, and the joint end thereof faces the cavity so that the second material is injected in a fitted state during the second molding. In heavy molding, the first molded product can be joined with the joint end of the second molded product fitted.
以下、本発明を添付図面に示す具体例に基づき、詳細に
説明することにする。Hereinafter, the present invention will be explained in detail based on specific examples shown in the accompanying drawings.
（実施例）
第１図〜第５図は本発明方法の原理を示す二重成形方法
の第１工程型組合わせ時、第１工程注入成形時、第１工
程型開き時、第２工程型組合わせお時よび第２工程注入
成形時のそれぞれの断面図で、図面では、第１図の第１
工程は中央凸部１１を何する雄型である第１上型１と中
央型面をバネ材２２で付勢されたピストン部材２１の露
出面２１ａにて形成された雌型である下型２とを型組合
わせし、下型２のピストン部材２１を押さず、第１材料
Ｗ１である硬質材を注入成形しく第２図参照）、第１上
型１を型開きすると、第１成形品Ｐｌは下型２に残る（
第３図参照）。(Example) Figures 1 to 5 show the principle of the method of the present invention when the first step mold is combined, during the first step injection molding, when the first step mold is opened, and when the second step mold is used. These are cross-sectional views at the time of combination and at the time of second step injection molding.
The process involves forming a first upper mold 1, which is a male mold, to form the central convex portion 11, and a lower mold 2, which is a female mold, which is formed by the exposed surface 21a of the piston member 21 whose central mold surface is biased by a spring member 22. When the first upper mold 1 is opened and the first upper mold 1 is opened, the first molded product is formed. Pl remains in the lower mold 2 (
(See Figure 3).
次に、第２工程では上記第１成形品Ｐ１を残したままの
下型２に第１成形品Ｐｌの中央開口Ｏを通して突出する
突起３１を有する第２上型３を型組み合わせすると、第
４図に示すように上記突起３１にて上記ピストン部材２
１を押し下げて露出面２１ａを後退させることにより、
上記第１成形品Ｐｉの接合端部Ｆ１は第２の型組合わせ
のキャビティＣにその上下成形面３０ａ及び２１ａに間
隙を置いた状態で臨むことになる。そこで上記第２材料
Ｗ２を注入成形することにより第２成形品Ｐ２の接合端
部Ｆ２が上記第１成形品の接合端部Ｆ１を包むように成
形されることになる（第５図参照）。Next, in the second step, a second upper mold 3 having a protrusion 31 projecting through the central opening O of the first molded product Pl is combined with the lower mold 2 with the first molded product P1 left in place. As shown in the figure, the piston member 2 is connected to the projection 31.
By pushing down 1 and retracting the exposed surface 21a,
The joint end F1 of the first molded product Pi faces the cavity C of the second mold combination with a gap between its upper and lower molding surfaces 30a and 21a. Therefore, by injection molding the second material W2, the joint end F2 of the second molded product P2 is formed so as to wrap the joint end F1 of the first molded product (see FIG. 5).
次の第２および第３実施例においては、第２工程の上型
３から突出する突起３１に代え、第１成形品の接合端部
から細い骨材を介して捨てボス部材４を成形して第２の
型組合わせ時に下型２のピストン部材２１を押圧するよ
うにする。In the following second and third embodiments, instead of the protrusion 31 protruding from the upper die 3 in the second step, a sacrificial boss member 4 is formed from the joint end of the first molded product through a thin aggregate. The piston member 21 of the lower mold 2 is pressed during the second mold combination.
第６図および第７図は、第８図に示す硬質カバー本体ｐ
ｉの所要開口部に軟質カバーＰ２を取り付けるとともに
硬質カバー本体Ｐ１の周縁にシールバ、キンＰ３を取り
付けてなるタイミングキアカバーの■−■断面図におけ
る成形工程を示す。FIGS. 6 and 7 show the hard cover main body p shown in FIG. 8.
The molding process is shown in a sectional view taken along ■-■ of a timing gear cover in which a soft cover P2 is attached to the required opening of i, and a sealer and a seal P3 are attached to the periphery of the hard cover main body P1.
ここでは、第１上型１の型面に第１成形品Ｐ１の開口０
の中央に細い骨材４１を介して第１成形品の接続する捨
てボス部材４が形成されるように凹部１２を形成する。Here, the opening 0 of the first molded product P1 is formed on the mold surface of the first upper mold 1.
A recess 12 is formed in the center of the recess 12 so that a disposable boss member 4 to which the first molded product is connected via a thin aggregate 41 is formed.
このようにすると、第６図に示すように、第１工程では
中央凸部１１を有する雄型である第１上型ｌと中央型面
をバネ材２２で付勢されたピストン部材２１の露出面２
１ａにて形成された雌型である下型２とを型組合わせし
、第１材ＲＷＩである硬質材を注入成形すると、第１成
形品Ｐ１の中央開口Ｏに細い骨材４１によって接続され
た捨てボス部材４が形成されることになる（第９図参照
）。In this way, as shown in FIG. 6, in the first step, the first upper mold l, which is a male mold having the central convex portion 11, and the piston member 21, whose central mold surface is biased by the spring member 22, are exposed. Side 2
When the lower mold 2, which is the female mold formed in step 1a, is assembled and a hard material, which is the first material RWI, is injection molded, it is connected to the central opening O of the first molded product P1 by a thin aggregate 41. A waste boss member 4 is formed (see FIG. 9).
次に、第２工程では上記第１成形品Ｐ１を残したままの
下型２に、第２上型３を型組合わせすると、第７図に示
すように上記捨てボス部材４を介して第２型のピストン
部材２１を押し下げて露出面２１ａを後退させることに
なり、上記第１成形品Ｐ１の接合端部Ｆ１は第２の型組
合わせのキャビティにその上下成形面３０ａ及び２１ａ
に間隙を置いた状態で臨むことになる。そこで上記第２
材料Ｗ２を注入成形すると、第２成形品Ｐ２の接合端部
Ｆ２が上記第１成形品の接合端部Ｆ１を包むように成形
されるとともに第２成形品Ｐ２が上記捨てボス部材４お
よび骨材４１内包した形態で成形されることになる。こ
の場合、上記骨材４１は第２の型締め時に切断するかた
わみを持たせるようにしてよい。さらにまた、捨てボス
部材４は第２材料に埋没させてもよいし、完成品の表面
に痕跡を残すようにしてもよい。Next, in the second step, when the second upper mold 3 is assembled to the lower mold 2 with the first molded product P1 left in place, the second upper mold 3 is inserted through the sacrificial boss member 4 as shown in FIG. The piston member 21 of the second mold is pushed down to retreat the exposed surface 21a, and the joint end F1 of the first molded product P1 is inserted into the cavity of the second mold combination with its upper and lower molding surfaces 30a and 21a.
We will face the situation with a gap between the two. Therefore, the second
When the material W2 is injection molded, the joint end F2 of the second molded product P2 is molded so as to wrap the joint end F1 of the first molded product, and the second molded product P2 is molded into the disposable boss member 4 and the aggregate 41. It will be molded in an encapsulated form. In this case, the aggregate 41 may be given some flexibility to be cut during the second mold clamping. Furthermore, the disposable boss member 4 may be buried in the second material, or may leave a trace on the surface of the finished product.
第３実施例においては、第１工程において、第１０図に
示すように、上記捨てボス部材４を第１成形品の中央開
口０が大きく、その中央部に捨てボス部材４を形成する
のが得策でない場合は、中央開口Ｏの周囲からやや離れ
た位置で保持されるように細い骨材４１′を介して捨て
ボス部材４゜形成保持し、該捨てボス部材４′を介して
第２の型組合わせ時に下型２のピストン部材２１を押し
下げて露出面２１ａを後退させることにより、上記第１
成形品Ｐ１の接合端部Ｆｌは第２の型組合わせのキャビ
ティにその上下成形面３０ａ及び２１ａに間隙を置いた
状態で臨むことになり、そこで上記第２材料Ｗ２を注入
成形することにより第２成形品Ｐ２の接合端部Ｆ２が上
記第１成形品の接合端部Ｆ１を包むように成形されると
ともに第２成形品Ｐ２が上記捨てボス部材４′および骨
材４１°を内包した形態で成形されることになる（第１
１図および第１２図参照）。この場合、上記第２実施例
と異なり、第１成形品の接合端部Ｆｌの近傍に捨てボス
部材４′が位置するので、水平方向の接合強度も充分に
保持されることになる。In the third embodiment, in the first step, as shown in FIG. 10, the first molded product has a large central opening 0, and the disposable boss member 4 is formed in the center thereof. If it is not a good idea, form and hold a second boss member 4° through a thin aggregate 41' so that it is held at a position slightly away from the periphery of the central opening O, and insert a second boss member 4° through the second boss member 4'. By pushing down the piston member 21 of the lower mold 2 and retracting the exposed surface 21a when assembling the molds, the first
The joint end Fl of the molded product P1 faces the cavity of the second mold combination with a gap between its upper and lower molding surfaces 30a and 21a, and the second material W2 is injection molded there. The joint end F2 of the second molded product P2 is molded so as to wrap the joint end F1 of the first molded product, and the second molded product P2 is molded in such a manner that it includes the sacrificial boss member 4' and the aggregate 41°. (1st
(See Figures 1 and 12). In this case, unlike the second embodiment, the sacrificial boss member 4' is located near the joint end Fl of the first molded product, so that the joint strength in the horizontal direction is also sufficiently maintained.
なお、上記第２および第３実施例において、第２成形品
Ｐ２の角部に丸みを付けたい場合は第１３図に示すよう
に、第１成形品の接合端部Ｆ１の裏面に第２成形品の接
合端部Ｆ２が食い込むように成形するのがよい。In addition, in the above-mentioned second and third embodiments, if it is desired to round the corners of the second molded product P2, as shown in FIG. It is preferable to mold the product so that the joint end F2 bites into the product.
（発明の効果）
以上の説明で明らかなように、本発明によれば、第１成
形時に第１成形品とともに捨てボス部材を成形するかま
たは第２成形型のいずれか一方に突起を設け、該捨てボ
ス部材または突起により第２成形型の他方を後退させ、
その接合端部を第２成形時に第２材料が嵌合状態で注入
成形されるようにそのキャビティに臨ませるので、二重
成形において第１成形品に第２成形品の接合端部が嵌合
した状態で接合でき、手作業によらずとも型抜き方向で
の接合強度の向上が図れる。(Effects of the Invention) As is clear from the above description, according to the present invention, a disposable boss member is molded together with the first molded product during the first molding, or a protrusion is provided on either one of the second molds, retracting the other side of the second mold by the disposable boss member or protrusion;
Since the joint end faces the cavity so that the second material is injection molded in a fitted state during the second molding, the joint end of the second molded product fits into the first molded product during double molding. It can be joined in a state where the parts are in the same state, and the joining strength in the die cutting direction can be improved without manual work.
第１図〜第５図は本発明方法の原理を示す二重成形方法
の第１工程型組合わせ時、第１工程注入成形時、第１工
程型開き時、第２工程型組合わせお時よび第２工程注入
成形時のそれぞれの断面説明図、第６図および第７図は
本発明方法をタイミングギアカバーの二重成形方法に利
用した場合の第８図の■−■線断面説明図、第８図はタ
イミングギアカバーの平面図、第９図は第１成形品の中
央開口周辺を示す平面図、第１０図および第１１図は本
発明方法をタイミングギアカバーの二重成形方法に利用
した場合の他の実施例の第８図の■−■線断面説明図、
第１２図はその要部拡大断面図、第１３図は第２成形品
の端部角部に丸みを持たせた場合の要部拡大断面図であ
る。
１・・・・・第１上型、２・・・・・・下型２１・・・
・・・ピストン部材１，３・・・・・・第２上型３１・
・・・・・突起、４・・・・・・捨てボス部材・・・骨
材
ＰＩ・・・・・・第１成形品、
Ｆ２・・・・・・第２成形品
Ｆｌ、Ｆ２・・・接合端部Figures 1 to 5 show the principle of the method of the present invention when combining the molds in the first step of the double molding method, during injection molding in the first step, when opening the mold in the first step, and when combining the molds in the second step. 6 and 7 are cross-sectional explanatory views taken along the line ■-■ in FIG. 8 when the method of the present invention is applied to a double molding method for a timing gear cover. , Fig. 8 is a plan view of the timing gear cover, Fig. 9 is a plan view showing the vicinity of the central opening of the first molded product, and Figs. A cross-sectional explanatory diagram along the line ■-■ in FIG. 8 of another embodiment when used,
FIG. 12 is an enlarged sectional view of the main part thereof, and FIG. 13 is an enlarged sectional view of the main part when the end corners of the second molded product are rounded. 1...First upper mold, 2...Lower mold 21...
...Piston members 1, 3...Second upper mold 31.
...Protrusion, 4...Disposable boss member...Aggregate PI...First molded product, F2...Second molded product Fl, F2...・Joining end
Claims (1)
を２種類用意して第１の型組み合わせにより第１材料を
注入成形する第１工程と、第２の型組み合わせにより第
２材料を第１成形品に重ねて注入成形する第２工程とか
らなる二重成形方法において、 上記第２型組み合わせを構成する雄型または雌型の一方
の型の成形面の少なくとも一部を型締方向に移動可能な
ピストン部材の露出面にて構成し、第１工程において、
上記ピストン部材を押すことなく、第１材料を注入成形
し、 第２工程において、上記ピストン部材を押し下げて露出
面を後退させることにより、上記第１成形品の接合端部
と上記ピストン部材の露出面の間に間隙を形成し、該間
隙にも上記第２材料が至るように注入成形することによ
り第２成形品の接合端部が上記第１成形品の接合端部を
包むように成形することを特徴とする二重成形方法。 ２、雄型と雌型からなり、第１材料を注入成形する第１
の型組み合わせと、第２材料を第１成形品に重ねて注入
成形する第２の型組み合わせとを有する二重成形用金型
であって、 上記第２の型組み合わせを構成する雄型または雌型の一
方の型の成形面の少なくとも一部が型締方向に移動可能
なピストン部材の露出面にて構成されている一方、他方
の型が型締め時に上記ピストン部材を押圧して後退させ
る突起を有することを特徴とする金型。 ３、雄型と雌型からなり、第１材料を注入成形する第１
の型組み合わせと、第２材料を第１成形品に重ねて注入
成形する第２の型組み合わせとを有する二重成形用金型
であって、 上記第１の型組み合わせにおいて、第１材料の注入成形
と同時に下記第２の型組み合わせにおける下記ピストン
部材の露出面を必要量移動させる捨てボス部材を成形す
る成形型面を有し、 上記第２の型組み合わせを構成する雄型または雌型の一
方の型の成形面の少なくとも一部がその型締時に上記捨
てボス部材により型締方向に移動可能なピストン部材の
露出面にて構成されていることを特徴とする金型。[Claims] 1. A first step of preparing a male mold and a female mold, one type of one of them and two types of the other, and injecting and molding a first material using a first mold combination; In a double molding method comprising a second step of overlaying a second material on the first molded product and injection molding using a mold combination, the molding surface of one of the male mold or female mold constituting the second mold combination. at least a part of the piston member is formed of an exposed surface of a piston member movable in the mold clamping direction, and in the first step,
The first material is injection-molded without pressing the piston member, and in a second step, the piston member is pushed down and the exposed surface is retreated, thereby exposing the joining end of the first molded product and the piston member. A gap is formed between the surfaces, and injection molding is performed so that the second material reaches the gap, so that the joint end of the second molded product wraps the joint end of the first molded product. A double molding method featuring: 2. The first mold, which consists of a male mold and a female mold, and injects the first material.
A double molding mold having a mold combination and a second mold combination for injection-molding a second material overlaid on a first molded product, the male mold or the female mold constituting the second mold combination. At least a part of the molding surface of one of the molds is constituted by the exposed surface of a piston member movable in the mold clamping direction, while the other mold presses and retreats the piston member during mold clamping. A mold characterized by having. 3. The first mold, which consists of a male mold and a female mold, and injects the first material.
and a second mold combination for injection-molding a second material overlaid on a first molded product, wherein the first mold combination includes injection molding of the first material. One of the male or female molds constituting the second mold combination, having a mold surface for molding a disposable boss member that simultaneously moves the exposed surface of the piston member described below in the second mold combination by a required amount. A mold characterized in that at least a part of the molding surface of the mold is constituted by an exposed surface of a piston member movable in the mold clamping direction by the sacrificial boss member when the mold is clamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096083A JPH0618747B2 (en) | 1989-04-14 | 1989-04-14 | Double molding method and mold structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096083A JPH0618747B2 (en) | 1989-04-14 | 1989-04-14 | Double molding method and mold structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02273216A true JPH02273216A (en) | 1990-11-07 |
| JPH0618747B2 JPH0618747B2 (en) | 1994-03-16 |
Family
ID=14155502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1096083A Expired - Fee Related JPH0618747B2 (en) | 1989-04-14 | 1989-04-14 | Double molding method and mold structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0618747B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002010453A (en) * | 2000-06-22 | 2002-01-11 | Inoac Corp | Blow-molded holding construction for wire harness |
| WO2004110723A1 (en) * | 2003-06-12 | 2004-12-23 | Toyo Tire & Rubber Co., Ltd. | Metal mold for molding bush of double-layer structure |
| JP2008049534A (en) * | 2006-08-23 | 2008-03-06 | Sansho Kk | Two-color molding mold for manufacturing side visor |
| WO2009036945A1 (en) * | 2007-09-19 | 2009-03-26 | Ifw Manfred Otte Gmbh | Method for the introduction of a seal into a plug connector part |
| JP2009143015A (en) * | 2007-12-11 | 2009-07-02 | Denso Corp | Mold device |
| JP2010052140A (en) * | 2008-08-26 | 2010-03-11 | Sumitomo Metal Mining Co Ltd | Spacer-integrated spool, mold for molding spool component, method for producing spool component, and spacer-integrated spool produced by this method |
| JP2019137431A (en) * | 2018-02-09 | 2019-08-22 | 大和製罐株式会社 | Method and device for manufacturing cap |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6112311A (en) * | 1984-06-29 | 1986-01-20 | Kamaya Kagaku Kogyo Kk | Method for molding multicolor resin container |
| JPS6274615A (en) * | 1985-09-28 | 1987-04-06 | Kamaya Kagaku Kogyo Co Ltd | Manufacture of molded body of different materials |
| JPS6420109A (en) * | 1987-07-16 | 1989-01-24 | Fujitsu Ltd | Two-color molding method |
-
1989
- 1989-04-14 JP JP1096083A patent/JPH0618747B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6112311A (en) * | 1984-06-29 | 1986-01-20 | Kamaya Kagaku Kogyo Kk | Method for molding multicolor resin container |
| JPS6274615A (en) * | 1985-09-28 | 1987-04-06 | Kamaya Kagaku Kogyo Co Ltd | Manufacture of molded body of different materials |
| JPS6420109A (en) * | 1987-07-16 | 1989-01-24 | Fujitsu Ltd | Two-color molding method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002010453A (en) * | 2000-06-22 | 2002-01-11 | Inoac Corp | Blow-molded holding construction for wire harness |
| WO2004110723A1 (en) * | 2003-06-12 | 2004-12-23 | Toyo Tire & Rubber Co., Ltd. | Metal mold for molding bush of double-layer structure |
| JP2008049534A (en) * | 2006-08-23 | 2008-03-06 | Sansho Kk | Two-color molding mold for manufacturing side visor |
| WO2009036945A1 (en) * | 2007-09-19 | 2009-03-26 | Ifw Manfred Otte Gmbh | Method for the introduction of a seal into a plug connector part |
| RU2482964C2 (en) * | 2007-09-19 | 2013-05-27 | Ифв Манфред Отте Гмбх | Method of fitting seal in plug-in connector |
| JP2009143015A (en) * | 2007-12-11 | 2009-07-02 | Denso Corp | Mold device |
| JP2010052140A (en) * | 2008-08-26 | 2010-03-11 | Sumitomo Metal Mining Co Ltd | Spacer-integrated spool, mold for molding spool component, method for producing spool component, and spacer-integrated spool produced by this method |
| JP2019137431A (en) * | 2018-02-09 | 2019-08-22 | 大和製罐株式会社 | Method and device for manufacturing cap |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0618747B2 (en) | 1994-03-16 |
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