JP2540615Y2 - Mold for molding - Google Patents
Mold for moldingInfo
- Publication number
- JP2540615Y2 JP2540615Y2 JP1990406743U JP40674390U JP2540615Y2 JP 2540615 Y2 JP2540615 Y2 JP 2540615Y2 JP 1990406743 U JP1990406743 U JP 1990406743U JP 40674390 U JP40674390 U JP 40674390U JP 2540615 Y2 JP2540615 Y2 JP 2540615Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- buffer layer
- molding
- contact buffer
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】本考案は、開口部を有する合成樹脂成形品
を成形するための成形用金型に関する。The present invention relates to a molding die for molding a synthetic resin molded product having an opening.
【０００２】[0002]
【従来の技術】従来、開口部を有する合成樹脂成形品、
例えばボルト挿通用等の開口部のある合成樹脂成形品を
射出成形するには、固定側金型にこの開口部をそのロッ
ド端部によって抜いた状態に成形するための油圧シリン
ダーを設けて金型の型開きに先立って、このロッドを後
退させて成形品を離型させたり、開口部に相当する部分
に固定側金型と移動側金型の一方から他方に向けてその
開口部成形用の凸部を、金型の型閉め時、他方の金型に
その頂面が面接合可能に設け、金型の型開き後、この凸
部から成形品を強制離型させるようにして成形してい
る。2. Description of the Related Art Conventionally, a synthetic resin molded product having an opening,
For example, in order to injection-mold a synthetic resin molded product having an opening for bolt insertion or the like, a hydraulic cylinder for forming the opening in a state where the opening is pulled out by its rod end is provided in the fixed mold. Prior to opening the mold, the rod is retracted to release the molded product, or a portion corresponding to the opening is formed from one of the fixed mold and the movable mold to the other for forming the opening. At the time of closing the mold of the mold, the convex portion is provided so that the top surface thereof can be joined to the other mold, and after the mold is opened, the molded product is forcibly released from the convex portion and molded. I have.
【０００３】[0003]
【考案が解決しようとする課題】しかしながら、開口部
を油圧シリンダーを用いて成形する場合には、金型構造
が複雑になって設備費や維持費が割高になり、又開口部
を一対の金型の一方に設けた開口部成形用の凸部によっ
て成形する場合には、型閉め時にはこの凸部と他方の金
型の間は高度な密着状態になることから、型閉め動作の
終了直前、又は型開き動作の開始直後にこの凸部と他方
の金型が高度な擦れ合い状態となって発熱し、両者が焼
け付いて、後の成形作業に支障が生じたりする。However, when the opening is formed by using a hydraulic cylinder, the mold structure becomes complicated, equipment and maintenance costs increase, and the opening is formed by a pair of metal molds. In the case of molding with the projection for forming an opening provided on one side of the mold, when the mold is closed, a high degree of close contact is established between the projection and the other mold, so immediately before the end of the mold closing operation, Alternatively, immediately after the start of the mold opening operation, the convex portion and the other mold are in a highly rubbed state and generate heat, and both are seized, which may hinder the subsequent molding operation.
【０００４】こうした従来の問題点に鑑みて考案された
のが本考案に係る成形用金型であって、開口部のある合
成樹脂成形品を成形するのに設備費や維持費が割高にな
らない一対の金型の一方に開口部成形用の凸部を設けた
簡単な金型構造を利用し、しかも一対の金型間に焼け付
きを生じることなく成形品を成形可能にすることを目的
とする。[0004] In view of such conventional problems, a molding die according to the present invention has been devised. In order to mold a synthetic resin molded product having an opening, equipment costs and maintenance costs are not expensive. An object of the present invention is to use a simple mold structure in which a convex portion for forming an opening is provided on one of a pair of molds, and to be able to mold a molded product without seizure between the pair of molds. I do.
【０００５】[0005]
【課題を解決するための手段】請求項１に係る成形用金
型は、開口部を有する合成樹脂成形品を射出成形するた
めの低炭素鋼からなる一対の成形用金型であって、一方
の金型に開口部成形用の凸部を形成して、その頂面に金
型を構成する素材よりも、熱伝導度が大きく且つ動摩擦
係数が小さい素材からなる接触緩衝層を積層状に設け、
型締め状態で、接触緩衝層が他方の金型の成形面に圧接
されるように構成したものである。A molding die according to claim 1 is a pair of molding dies made of low carbon steel for injection molding a synthetic resin molded product having an opening. A contact buffer layer made of a material having a higher thermal conductivity and a smaller dynamic friction coefficient than the material constituting the mold is provided on the top surface of the convex portion for forming the opening in the metal mold. ,
In the clamped state, the contact buffer layer is configured to be pressed against the molding surface of the other mold.
【０００６】ここで、請求項２記載のように、接触緩衝
層を構成する素材として、２０℃のときの熱伝導度が
０．１３ｃａｌ／ｃｍ３・ｓｅｃ・℃以上であって、且
つ動摩擦係数が０．１３μｏ以下である素材を用いるこ
と、請求項３記載のように、接触緩衝層を構成する素材
として、銅合金を用いること、請求項４記載のように、
接触緩衝層を構成する素材として、アームスブロンズを
用いること、請求項５記載のように、接触緩衝層の厚み
を略１ｍｍに設定すること、などが好ましい実施例であ
る。Here, as a material constituting the contact buffer layer, the thermal conductivity at 20 ° C. is 0.13 cal / cm 3 · sec · ° C. or more, and the coefficient of kinetic friction. As described in claim 3, a material having a thickness of 0.13 μo or less is used, and a copper alloy is used as a material constituting the contact buffer layer.
Preferred examples include using arms bronze as a material constituting the contact buffer layer, and setting the thickness of the contact buffer layer to about 1 mm as described in claim 5.
【０００７】[0007]
【作用】本発明に係る成形用金型においては、一方の金
型に開口部成形用の凸部の頂面に接触緩衝層が積層状に
設けられ、型締め時、接触緩衝層は他方の金型の成形面
に圧接されることになるが、接触緩衝層の素材として、
金型を構成する低炭素鋼よりも、熱伝導度が大きく且つ
動摩擦係数が小さい素材を用いてあるので、接触緩衝層
と成形面間における摩擦抵抗による発熱が抑制されると
ともに、接触緩衝層の温度上昇が緩和されることにな
る。In the molding die according to the present invention, a contact buffer layer is provided on one of the molds on the top surface of the convex portion for forming the opening, and the contact buffer layer is attached to the other when the mold is clamped. It will be pressed against the molding surface of the mold, but as a material for the contact buffer layer,
Since a material having a higher thermal conductivity and a smaller dynamic friction coefficient is used than the low-carbon steel constituting the mold, heat generation due to frictional resistance between the contact buffer layer and the molding surface is suppressed, and the contact buffer layer The temperature rise will be reduced.
【０００８】[0008]
【実施例】本考案に係る成形用金型の詳細を添付の図面
にもとづき更に説明する。図中１として示す合成樹脂成
形品は、板状本体２の端縁に屈曲縁３を設け、その屈曲
縁３の端部から板状本体２に平行に折返し縁４を設けた
ものであって、この板状本体２にボルト挿通用の開口部
５が形成したものである。そして、図中６が成形品１の
板状本体２、屈曲縁３、折返し縁４の折曲外側面を成形
する固定側金型で、図中７がその内側面を成形する移動
側金型である。こうした一対の金型６，７を利用して成
形品１が射出成形されるのである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the molding die according to the present invention will be further described with reference to the accompanying drawings. In the synthetic resin molded product shown as 1 in the figure, a bent edge 3 is provided at an edge of the plate-shaped main body 2, and a folded edge 4 is provided from an end of the bent edge 3 in parallel with the plate-shaped main body 2. An opening 5 for bolt insertion is formed in the plate-shaped main body 2. In the figure, reference numeral 6 denotes a fixed mold for molding the plate-like main body 2, the bent edge 3, and the folded edge 4 of the molded article 1, and a movable mold 7 for molding the inner surface thereof. It is. The molded article 1 is injection-molded using the pair of dies 6 and 7.
【０００９】この移動側金型７は成形品１を残したま
ま、固定側金型６から図中下側に移動させて金型の型開
きをするようにしているが、離型時の抜き勾配として、
固定側金型６と成形品１の間、並びに移動側金型７と成
形品１の間には図中αとして示す角度を、例えば０゜３
０′〜１゜３０′の範囲内に形成している。そして、図
中８として示すのがその構成素材中に形成される開口部
５を成形するために、移動側金型７から固定側金型６に
向けて、その一対の金型６，７の型閉め時、その頂面９
が固定側金型６に面接合可能に設けた開口部成形用の凸
部である。この凸部８の頂面９には２０℃のときの熱伝
導度が０．１３ｃａｌ／ｃｍ３・ｓｅｃ・℃以上と大き
く、しかも動摩擦係数が０．１３μｏと小さいシート状
の特殊アルミ青銅であるアームスブロンズからなる接触
緩衝層１０を積層形成させている。ここで、μｏは静止
摩擦係数を示している。この射出成形用に利用される金
型６，７は低炭素鋼から構成されているが、このように
接触緩衝層１０として、シート状のアームスブロンズを
利用したときには溶接によって容易に積層させることが
できる。そして、このアームスブロンズからなる接触緩
衝層１０は略１ｍｍの厚さで所期の目的が充分達成でき
ることが実験上、判明した。The movable mold 7 is moved downward from the fixed mold 6 in the drawing while the molded article 1 is left to open the mold. As a gradient,
The angle shown as α in the figure between the fixed mold 6 and the molded article 1 and between the movable mold 7 and the molded article 1 is, for example, 0 ゜ 3.
It is formed in the range of 0'-1'30 '. In the figure, reference numeral 8 denotes a pair of dies 6 and 7 from the movable die 7 to the fixed die 6 in order to form the opening 5 formed in the constituent material. When the mold is closed, its top surface 9
Is a convex portion for forming an opening provided so as to be surface-bondable to the fixed mold 6. The top surface 9 of the projection 8 is a sheet-shaped special aluminum bronze having a large thermal conductivity at 20 ° C. of 0.13 cal / cm 3 · sec · ° C. or more and a low dynamic friction coefficient of 0.13 μo. A contact buffer layer 10 made of Arms bronze is laminated. Here, μo indicates a static friction coefficient. The dies 6 and 7 used for the injection molding are made of low carbon steel. In this way, when the sheet-shaped arm bronze is used as the contact buffer layer 10, it can be easily laminated by welding. it can. Experiments have shown that the intended purpose can be sufficiently achieved with the contact buffer layer 10 made of Arms bronze having a thickness of about 1 mm.
【００１０】ところで、こうした接触緩衝層１０を設け
ない場合、一対の金型６，７の型閉め時には、この凸部
８の頂面９と固定側金型６の間は高度な密着状態になる
ことから、型閉め、型開きを繰り返す度に、型閉め動作
の終了直前、又は型開き動作の開始直後に、この凸部８
と固定側金型６が高度な擦れ合い状態となり、又これら
金型６，７を構成する、低炭素鋼は熱伝導度が小さく、
しかも動摩擦係数が大きいことから、この直接の接触部
に発生した熱量が蓄積して両者が焼け付き、後の成形作
業に支障が生じる。しかし、このように凸部８の固定側
金型６と直接接触する少なくとも頂面９にこうした熱伝
導度が大きく、しかも動摩擦係数が小さい素材による接
触緩衝層１０を設けたならば、このような問題点を未然
に解消することができる。尚、図中１１は凸部８の移動
側金型７の移動側側面に設けた成形品１の離型用の傾斜
面である。When the contact buffer layer 10 is not provided, when the pair of dies 6 and 7 are closed, a high degree of close contact is established between the top surface 9 of the projection 8 and the fixed-side die 6. Therefore, each time the mold closing and the mold opening are repeated, immediately before the mold closing operation is completed or immediately after the mold opening operation is started, the protrusion 8 is formed.
And the fixed side mold 6 are in a highly rubbed state, and the low carbon steel constituting these molds 6 and 7 has low thermal conductivity,
Moreover, since the coefficient of kinetic friction is large, the amount of heat generated in the direct contact portion accumulates, and both are burned, which hinders the subsequent forming operation. However, if such a contact buffer layer 10 made of a material having a high thermal conductivity and a small dynamic friction coefficient is provided on at least the top surface 9 of the projection 8 which is in direct contact with the fixed-side mold 6 of the projection 8 as described above. Problems can be solved beforehand. In the figure, reference numeral 11 denotes an inclined surface for releasing the molded product 1 provided on the moving side surface of the moving mold 7 of the projection 8.
【００１１】而して、こうした成形用金型で、合成樹脂
成形品１を常法通り、射出成形する。そして、金型の型
開きに際しては、成形品１の開口部５の口縁上をまず凸
部８の傾斜面１１から滑らせて成形品１を移動側金型７
から強制離型させ、次いで固定側金型６側に残る成形品
１を離型させて成形品を取出すのである。図示した実施
例にかかわらず、接触緩衝層１０を、銅合金、その他の
熱伝導度が大きく、しかも動摩擦係数が小さい金属、又
は四弗化エチレン系樹脂、更には複合めっき層によって
形成することも可能である。又、接触緩衝層１０を設け
るに際して、素材によって最適な手段で設けることも可
能である。更に、比較的熱伝導度の小さい素材ではその
厚みを大きく、比較的熱伝導度の大きい素材ではその厚
みを小さくすればよい。又、固定側金型６に凸部８を設
けたり、一対の金型６，７の双方にわたって凸部８を設
けることも可能である。Thus, the synthetic resin molded article 1 is injection-molded in a usual manner using such a molding die. When the mold is opened, the molded article 1 is first slid over the edge of the opening 5 of the molded article 1 from the inclined surface 11 of the projection 8 to move the molded article 1 to the movable mold 7.
Then, the molded product 1 remaining on the fixed mold 6 is released from the mold, and the molded product is taken out. Regardless of the illustrated embodiment, the contact buffer layer 10 may be formed of a copper alloy, another metal having high thermal conductivity and a low dynamic friction coefficient, or a tetrafluoroethylene-based resin, or a composite plating layer. It is possible. When providing the contact buffer layer 10, it is also possible to provide the contact buffer layer 10 by an optimal means depending on the material. Further, a material having a relatively low thermal conductivity may have a large thickness, and a material having a relatively high thermal conductivity may have a small thickness. Further, it is also possible to provide the convex portion 8 on the fixed die 6 or to provide the convex portion 8 over both the pair of dies 6 and 7.
【００１２】[0012]
【考案の効果】以上のようになる本考案に係る成形用金
型にあっては、合成樹脂成形品の開口部を、一対の金型
の一方から他方の金型に向けて設けた凸部を利用して成
形でき、その金型構造が簡単になって、設備費や維持費
が割高になるおそれがなく、更には型閉め、型開きを繰
り返すうちに、凸部の頂面と他方の金型とが焼け付くこ
ともその凸部の頂面に設けた接触緩衝層により防止さ
れ、後の成形作業に支障を生じるおそれもないのであ
る。[Effect of the Invention] In the molding die according to the present invention as described above, the opening of the synthetic resin molded product is formed by projecting from one of the pair of dies toward the other. The mold structure can be simplified, and there is no fear that equipment costs and maintenance costs will be relatively high.Furthermore, while the mold is closed and the mold is opened repeatedly, the top surface of the convex portion and the other Seizure from the mold is prevented by the contact buffer layer provided on the top surface of the convex portion, and there is no possibility that the subsequent molding operation will be hindered.
【図１】本考案に係る成形用金型の一部を示す断面図FIG. 1 is a sectional view showing a part of a molding die according to the present invention.
【図２】同成形用金型の要部を示す断面図FIG. 2 is a cross-sectional view showing a main part of the molding die.
１ 合成樹脂成形品 ２ 板状本体 ３ 屈曲縁 ４ 折返し縁 ５ 開口部 ６ 固定側金型 ７ 移動側金型 ８ 開口部成形用の
凸部 ９ 頂面 １０ 接触緩衝層 １１ 傾斜面DESCRIPTION OF SYMBOLS 1 Synthetic resin molded product 2 Plate-shaped main body 3 Bent edge 4 Folded edge 5 Opening 6 Fixed mold 7 Moving mold 8 Convex part for forming an opening 9 Top surface 10 Contact buffer layer 11 Slope
Claims (5)
形するための低炭素鋼からなる一対の成形用金型であっ
て、 一方の金型に開口部成形用の凸部を形成して、その頂面
に金型を構成する素材よりも、熱伝導度が大きく且つ動
摩擦係数が小さい素材からなる接触緩衝層を積層状に設
け、 型締め状態で、接触緩衝層が他方の金型の成形面に圧接
されるように構成した成形用金型。1. A pair of molding dies made of low-carbon steel for injection-molding a synthetic resin molded product having an opening, wherein one of the dies has a projection for forming an opening. On the top surface, a contact buffer layer made of a material having a higher thermal conductivity and a smaller dynamic friction coefficient than the material constituting the mold is provided in a laminated shape, and in a mold-clamped state, the contact buffer layer is formed of the other mold. A molding die configured to be pressed against a molding surface.
℃のときの熱伝導度が０．１３ｃａｌ／ｃｍ３・ｓｅｃ
・℃以上であって、且つ動摩擦係数が０．１３μｏ以下
である素材を用いた請求項１記載の成形用金型。2. The material constituting the contact buffer layer may be 20
0.13 cal / cm 3 · sec.
The molding die according to claim 1, wherein a material having a temperature of not lower than ℃ and a dynamic friction coefficient of not higher than 0.13 µo is used.
金を用いた請求項１又は２記載の成形用金型。3. The molding die according to claim 1, wherein a copper alloy is used as a material constituting the contact buffer layer.
ムスブロンズを用いた請求項３記載の記載の成形用金
型。4. The molding die according to claim 3, wherein an arm bronze is used as a material constituting the contact buffer layer.
請求項１〜４のいずれか１項記載の成形用金型。5. The molding die according to claim 1, wherein the thickness of the contact buffer layer is set to approximately 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990406743U JP2540615Y2 (en) | 1990-12-21 | 1990-12-21 | Mold for molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990406743U JP2540615Y2 (en) | 1990-12-21 | 1990-12-21 | Mold for molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0490518U JPH0490518U (en) | 1992-08-06 |
| JP2540615Y2 true JP2540615Y2 (en) | 1997-07-09 |
Family
ID=31883862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990406743U Expired - Lifetime JP2540615Y2 (en) | 1990-12-21 | 1990-12-21 | Mold for molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540615Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63184707U (en) * | 1987-05-22 | 1988-11-28 |
-
1990
- 1990-12-21 JP JP1990406743U patent/JP2540615Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0490518U (en) | 1992-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5783132A (en) | Process for producing a fiber-reinforced thermoplastic resin molded article | |
| JP2008247045A (en) | Molding method of resin molded product, resin molded product, in-mold-coating molding method and in-mold-coated molded product | |
| KR950008086A (en) | Forming method and apparatus for thin film molded article | |
| JP2540615Y2 (en) | Mold for molding | |
| JPWO2020017579A1 (en) | Molds for injection molding and manufacturing methods for molded products | |
| JP3653508B2 (en) | Injection mold | |
| JPH0462125A (en) | Mold for compressed gas-feeding molding | |
| JPH09104038A (en) | Injection mold | |
| JPH0966547A (en) | Injection mold | |
| JP3087083B2 (en) | Graphite mold for plastic molding | |
| JPH0136583Y2 (en) | ||
| JPS6242773B2 (en) | ||
| JPH0126422Y2 (en) | ||
| JP2005066663A (en) | Thixocasting apparatus and method for cast iron | |
| JPH081681A (en) | Mold apparatus | |
| JP2707615B2 (en) | Two-color molding equipment | |
| JP2023141824A (en) | Injection molding die and manufacturing method for resin molded products | |
| JP2794184B2 (en) | Graphite mold for plastic molding | |
| JPH0558249U (en) | Injection mold | |
| JPH0688322B2 (en) | Core mold for high temperature mold release of preform | |
| JPS58217331A (en) | Method and apparatus for preventing sink in plastic molding | |
| JPH0521389Y2 (en) | ||
| JPH09207179A (en) | Mold for injection molding of thermoplastic resin | |
| JP2524502Y2 (en) | Injection mold | |
| JPH0723226Y2 (en) | Injection mold |