JP2925128B2 - Resin mold - Google Patents
Resin moldInfo
- Publication number
- JP2925128B2 JP2925128B2 JP5306763A JP30676393A JP2925128B2 JP 2925128 B2 JP2925128 B2 JP 2925128B2 JP 5306763 A JP5306763 A JP 5306763A JP 30676393 A JP30676393 A JP 30676393A JP 2925128 B2 JP2925128 B2 JP 2925128B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- cavity
- resin
- molding
- molded product
- 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 - Fee Related
Links
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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0043—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks preventing shrinkage by reducing the wall thickness of the moulded article
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明はリブを有する製品の一部
がアンダカット部となった樹脂成形品を成形するための
樹脂成形金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molding die for molding a resin molded product in which a part of a product having a rib is an undercut portion.
【０００２】[0002]
【従来の技術】従来、樹脂成形金型においてアンダカッ
ト部を処理するための機構としてアンギュラピンを使用
したスライドコア機構が知られている。この機構は型に
設けた傾斜ピンを利用して割型を自動的に移行させ、ア
ンダカット部を避けて成形品を突き出すようにした機構
である。また、深いリブを有する成形品を成形する場
合、リブのガス抜き不足に起因する成形不良を避けるた
め、ガス抜き用入駒を金型内部に設けてこの入駒と金型
との接合部をリブに臨ませるような方法が知られてい
る。更に、深いリブを成形する際は、リブの付根にひけ
が生じやすくなることも知られており、このひけ対策の
ためリブの付根にいわゆる肉ぬすみと呼ばれる溝状の凹
部を形成することも知られている。2. Description of the Related Art Conventionally, a slide core mechanism using an angular pin has been known as a mechanism for treating an undercut portion in a resin molding die. This mechanism automatically shifts the split mold using an inclined pin provided on the mold, and projects the molded product avoiding the undercut portion. Also, when molding a molded product having a deep rib, in order to avoid molding defects due to insufficient gas release of the rib, a degassing input piece is provided inside the mold, and a joint between the input piece and the mold is formed. There is a known method of facing the rib. Further, it is also known that when deep ribs are formed, sinks tend to occur at the roots of the ribs, and it is also known to form groove-shaped recesses called so-called fleshy holes at the roots of the ribs in order to prevent sinking. Have been.
【０００３】[0003]
【発明が解決しようとする課題】ところが、一般にアン
ギュラピンを使用したスライドコア機構の場合は部品点
数が多くなり、仕上工数もかかり、コストアップの原因
になるという問題があった。また、例えば深いリブの付
根に生じるひけ対策のための肉ぬすみが、アンダカット
部になるような場合斜め押上げコアを使用するが、アン
ギュラピン機構と斜め押上げコアを夫々別個に構成する
と、一層構成が複雑になりコスト高になるという問題が
あった。However, in the case of a slide core mechanism using an angular pin, the number of parts is generally increased, the number of finishing steps is increased, and the cost is increased. In addition, for example, when the undercut is used as a countermeasure for sinking that occurs at the root of the deep rib, the oblique push-up core is used.However, if the angular pin mechanism and the oblique push-up core are separately configured, There has been a problem that the configuration is further complicated and the cost is increased.
【０００４】[0004]
【課題を解決するための手段】かかる課題を解決するた
め、本発明は、開閉自在な可動金型、固定金型間にキャ
ビテイを形成し、該キャビティで樹脂を成形する樹脂成
形金型であって、前記金型の一方に設けた凹部に嵌込ま
れ、該凹部に対して斜めに進退する斜め押上げコアに、
キャビテイ内に突出する突起を備え、キャビティ内に突
出する該突起で樹脂成形品に設けたリブの付根に第１ア
ンダカット部を成形し、樹脂成形品の成形後、該樹脂成
形品の突出しに連動させて前記斜め押上げコアを斜め前
方に移動 させ、該斜め押上げコアの移動によって成形時
に生じる前記リブからのガス抜きを行うとともに、前記
リブの付根の第１アンダカットから前記押上げコアの突
起を離すようにした樹脂成形金型であって、前記斜め押
上げコアの内部には、スライドピンをその先端部が前記
キャビティ内に出没自在となるようにスプリングを介し
て進退自在に設け、斜め押上げコアを嵌込む前記凹部に
は、前記スライドピンの基端部と金型閉じ時に係合する
規制傾斜面を設け、前記押上げピンの前記凹部内への嵌
込みで、前記スライドピンの基端部を前記凹部の規制傾
斜面に係合させて該スライドピンの先端部を前記キャビ
ティ内に突出させ、前記樹脂成形品の一部に孔状の第２
アンダカット部を成形し、前記樹脂成形品の成形後、該
樹脂成形品の突出しに連動する前記斜め押上げコアの移
動により、前記スライドピンの基端部と凹部の規制傾斜
面との係合を解除し、該スライドピンを前記キャビティ
内から後退させて第２アンダカット部から離すように構
成したことを特徴とする。 SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a movable mold that can be opened and closed and a fixed mold.
Forming resin and molding resin in the cavity
A mold, fitted in a recess provided in one of the molds
To the diagonal push-up core that moves obliquely with respect to the recess,
It has a projection that projects into the cavity and projects into the cavity.
The first protrusion is provided at the base of the rib provided on the resin molded product by the projection.
After molding the resin cut part and molding the resin molded product,
The diagonal push-up core is moved diagonally forward in conjunction with the
During molding by moving the obliquely pushing up core.
While degassing from the rib that occurs in the
From the first undercut at the base of the rib,
A resin molding die that is separated from
Inside the raised core, the tip of the slide pin is
Via a spring so that it can come and go inside the cavity
To be able to move forward and backward, and to insert
Engages with the base end of the slide pin when the mold is closed.
A regulating inclined surface is provided, and the push-up pin is fitted into the recess.
In addition, the base end of the slide pin is tilted by the restriction of the recess.
The tip of the slide pin is engaged with the slope by
And a hole-shaped second part is formed in a part of the resin molded product.
After molding the undercut portion and molding the resin molded product,
Movement of the oblique push-up core in conjunction with the protrusion of the resin molded product
Movement, the regulation inclination of the base end of the slide pin and the recess
And disengage the slide pin from the cavity.
Retract from inside and separate from the second undercut.
It is characterized by having done.
【０００５】[0005]
【作用】斜め押上げコアによって成形時のリブからのガ
ス抜きを行い、成形品を突き出す際はこの斜め押上げコ
アによって第１アンダカット部を避けるようにすること
で、部品点数が少なくなり、簡素化が可能となり、又こ
の斜め押上げコアの内部に出没自在なスライドピンを設
け、このスライドピンによって第２のアンダカット部を
処理出来るようにしたので、複雑な形状の成形品でも簡
素な金型で成形出来る。[Effect] The gas is released from the ribs at the time of molding by the obliquely pushing up core, and when the molded product is protruded, the obliquely pushing up core avoids the first undercut portion, thereby reducing the number of parts. Simplification is possible, and a slide pin is provided inside the oblique push-up core so that the slide pin can come and go, so that the second undercut portion can be processed by the slide pin. It can be molded with a mold.
【０００６】[0006]
【実施例】本発明の樹脂成形金型の実施例について添付
した図面に基づき説明する。図１は本樹脂成形金型の一
部縦断面図、図２は要部拡大図、図３はリブの拡大図で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the resin molding die of the present invention will be described with reference to the accompanying drawings. 1 is a partial longitudinal sectional view of the resin molding die, FIG. 2 is an enlarged view of a main part, and FIG. 3 is an enlarged view of a rib.
【０００７】図１に示すように、本発明の樹脂成形金型
は固定型１に対して図中上下に移動して型締め、型開き
自在な可動型２を備え、この可動型２の凹部２１にはキ
ャビティ５の一部を形成する斜め押上げコア４が、斜め
上下動自在に嵌込んで設けられている。[0007] As shown in FIG. 1, the resin molding mold of the present invention is clamping by moving in the figure up and down with respect to the fixed mold 1, the mold comprising a freely movable mold 2 opened, the recess of the movable mold 2 21 diagonal push-up core 4 which forms part of the cavity 5 in the oblique
It is provided so as to be vertically movable .
【０００８】そして、可動型２の下方には、第１突出し
板６と第２突出し板７が設けられ、第２突出し板７の下
面には上下動自在な突出しロッド８が当接するととも
に、第１突出し板６には突出しピン１０の基端部が連結
されており、この突出しピン１０は可動型２を摺動自在
に貫いてその先端部がキャビティ５面に臨んでいる。A first protruding plate 6 and a second protruding plate 7 are provided below the movable mold 2, and a vertically movable protruding rod 8 contacts the lower surface of the second protruding plate 7, A base end of a protruding pin 10 is connected to the protruding plate 6, and the protruding pin 10 slidably penetrates the movable mold 2, and a front end thereof faces the cavity 5 surface.
【０００９】また、第２突出し板７にはスライドコアガ
イドユニット１１を介して傾斜ロッド１２の基端部が連
結されており、この傾斜ロッド１２は可動型２のガイド
ブッシュ１３を摺動自在に貫いてその先端部が前記斜め
押上げコア４に連結されている。Further, the second collision pulling plate 7 has a base end portion of the inclined rod 12 through the slide core guide unit 11 is connected, the inclined rod 12 slidably in the guide bush 13 movable mold 2 And its tip is connected to the oblique lifting core 4.
【００１０】ところで、前記キャビティ５は成形品Ｗに
深いリブを成形するためのリブ成形部５ａを備えてお
り、前記斜め押上げコア４は、成形時にリブ成形部５ａ
のガスを排出するとともに、離型時にリブ成形部５ａに
形成される第１アンダカット部Ｕｒを処理するために設
けられているものであり、以下その細部について説明す
る。Incidentally, the cavity 5 is provided with a rib forming portion 5a for forming a deep rib on the molded product W.
And for treating the first undercut portion Ur formed in the rib forming portion 5a at the time of mold release, and details thereof will be described below.
【００１１】通常、成形品に深いリブを成形する場合、
リブの付根の厚さはベース肉厚の５０〜８０％に設定す
るが、深いリブの場合、リブ先端の厚みを確保するため
この値を超えてしまい、図４に示すように成形品Ｗのリ
ブＲの裏面側にホットスポットと呼ばれるひけｄが生じ
やすく、またリブ先端に充填不足を起こしやすい。Usually, when forming a deep rib on a molded product,
The thickness of the base of the rib is set to 50 to 80% of the base thickness. However, in the case of a deep rib, the value exceeds this value in order to secure the thickness of the tip of the rib, and as shown in FIG. A sink d called a hot spot is easily generated on the rear surface side of the rib R, and the rib tip is apt to be insufficiently filled.
【００１２】従って、従来ではこのリブ成形部に、図４
に示すようなガス抜き用入駒５１を臨ませてガス抜きを
図っていた。Therefore, conventionally, the rib forming portion is provided with
In order to release the gas, the gas releasing piece 51 as shown in FIG.
【００１３】そこで、本案ではひけ防止を一層確実にす
るため、図３に示すように、斜め押上げコア４の上端の
突起４ａによってリブ成形部５ａの付根にいわゆる肉ぬ
すみと呼ばれる溝状の凹部を形成するようにし、この突
起４ａによって形成されるリブの第１アンダカット部Ｕ
ｒの処理のため、斜め押上げコア４を突起４ａ形成側と
反対方向の斜め前方に移動させるようにしている。In the present invention, in order to more reliably prevent sink marks, as shown in FIG. 3, a groove-shaped concave portion called a so-called flesh-thickness is formed at the base of the rib forming portion 5a by a protrusion 4a at the upper end of the obliquely pushing-up core 4. Is formed, and the first undercut portion U of the rib formed by the projection 4a is formed.
For the processing of r, the oblique push-up core 4 is moved obliquely forward in a direction opposite to the side on which the protrusions 4a are formed.
【００１４】しかも、この斜め押上げコア４の端面をリ
ブ成形部５ａに臨ませることで、従来のガス抜き用入駒
５１（図４）の代用にしている。Further, the end face of the obliquely pushing up core 4 is made to face the rib forming portion 5a, so that it can be used in place of the conventional degassing input piece 51 (FIG. 4).
【００１５】ところで、この斜め押上げコア４には、図
２に示すようなスライドピン１５を設けている。By the way, the oblique push-up core 4 is provided with a slide pin 15 as shown in FIG.
【００１６】このスライドピン１５は、斜め押上げコア
４の収納孔４ｂ内に収納されており、スプリング１６に
よって後方に付勢されている。収納孔４ｂは、図２、図
５で明示したように、キャビティ側が少しく上位で、可
動型２の凹部側が少しく下位となるように斜めに設けら
れている。 The slide pin 15 is housed in the housing hole 4b of the oblique lifting core 4, and is urged rearward by a spring 16. The storage hole 4b is shown in FIGS.
As specified in 5, the cavity side is slightly higher
It is provided diagonally so that the concave side of the dynamic mold 2 is slightly lower.
Have been.
【００１７】そして可動型２の斜め押上げコアを嵌込ん
だ凹部２１には、スライドピン１５の基端部１５ｂの端
面に当接して該スライドピン１５の前進させ、その先端
部１５ａをキャビティ内に突出させ（図２参照）、又当
接が解除されることでスプリングで後退し、その先端部
を収納孔４ｂ内に没入させ（図５参照）、スライドピン
１５の出没量を調整する規制傾斜面２ａが設けられ、こ
の規制傾斜面２ａの傾斜方向及び傾斜角度は、前記傾斜
ロッド１２の傾斜方向と同一で且つそれより深い角度で
傾斜している。Then, the oblique push-up core of the movable mold 2 is fitted.
The slide pin 15 is moved forward by abutting against the end surface of the base end 15 b of the slide pin 15 in the recess 21.
The portion 15a is projected into the cavity (see FIG. 2).
When the contact is released, it retreats with the spring, and its tip
Is immersed in the storage hole 4b (see FIG. 5), and a regulating inclined surface 2a for adjusting the amount of the slide pin 15 is provided. The inclination direction and the inclination angle of the regulating inclined surface 2a are determined by the inclination of the inclined rod 12. It is inclined at the same angle as the direction and at a deeper angle.
【００１８】また、スライドピン１５の先端部１５ａ
は、型締めした状態で収納孔４ｂの外部に向けてキャビ
ティ５内に突出するように構成している。従って、この
キャビティ５内に突出した先端部１５ａは、第２アンダ
カット部Ｕｏとして構成されることになる。Further, the tip 15a of the slide pin 15
Are configured to protrude into the cavity 5 toward the outside of the storage hole 4b in a clamped state. Therefore, the tip 15a protruding into the cavity 5 is configured as a second undercut Uo.
【００１９】また、斜め押上げコア４が可動型２に対し
て斜め前方に前進すると、図５に示すように、規制傾斜
面２ａの傾斜角度が大きいため、スライドピン１５は徐
々に後退し、最後には先端部１５ａが収納孔４ｂ内に没
入するようにしている。When the oblique push-up core 4 advances obliquely forward with respect to the movable mold 2, as shown in FIG. 5, since the inclination angle of the regulating inclined surface 2a is large, the slide pin 15 gradually retreats, Finally, the tip 15a is immersed in the storage hole 4b.
【００２０】そして、最終的に規制傾斜面２ａから離れ
たスライドピン１５の後退位置を規制するため、図６に
示すようなストッパ１７を設けている。Then, a stopper 17 as shown in FIG. 6 is provided to regulate the retracted position of the slide pin 15 finally separated from the regulating inclined surface 2a.
【００２１】以上のように構成した樹脂成形金型におい
て、図１のような型締め状態でキャビティ５内に溶融樹
脂を充填して成形する。In the resin molding die configured as described above, the cavity 5 is filled with a molten resin and molded in a closed state as shown in FIG.
【００２２】すると、リブ成形部５ａで生じるガスは、
斜め押上げコア４と可動型２の接合部から排出され、し
かも、リブ付根部には斜め押上げコア４の突起４ａによ
って肉ぬすみが形成されていることから、リブの裏面側
にひけ等の成形不良が生じない。またキャビティ内に臨
むスライドピン１５の先端部１５ａによって、成形品Ｗ
には、第２アンダカット部である孔が明けられる。Then, the gas generated in the rib forming portion 5a is
It is discharged from the joint between the obliquely pushing-up core 4 and the movable mold 2, and moreover, since the protrusions 4 a of the obliquely pushing-up core 4 form a flesh-filled portion at the root of the rib, sinks or the like are formed on the back side of the rib. No molding failure occurs. Also in the cavity
The molded product W is formed by the tip 15a of the slide pin 15
, A hole is formed as a second undercut portion .
【００２３】成形が完了して型開きされると、突出しロ
ッド８によって第１、第２突出し板６、７を前進させ
る。When the molding is completed and the mold is opened, the first and second projecting plates 6, 7 are advanced by the projecting rod 8.
【００２４】このため、突出しピン１０は真っ直ぐ前方
に前進し、これとともに斜め押上げコア４は傾斜ロッド
１２の傾斜方向に沿って斜め前方に前進する。従って、
図５に示すように、リブの第１アンダカット部Ｕｒを形
成する突起４ａは成形品Ｗからスムーズに離脱する。For this reason, the projecting pin 10 advances straight forward, and at the same time, the oblique push-up core 4 advances obliquely forward along the inclination direction of the inclined rod 12. Therefore,
As shown in FIG. 5, the protrusion 4 a forming the first undercut portion Ur of the rib is smoothly separated from the molded product W.
【００２５】また、それと同時にスライドピン１５の先
端部１５ａも斜め押上げコア４内に没入し、それまで形
成されていた第２アンダカット部Ｕｏも突き出しの邪魔
にはならない。At the same time, the distal end 15a of the slide pin 15 also sinks into the oblique lifting core 4, and the second undercut Uo formed up to that point does not obstruct the protrusion.
【００２６】つまり、このような金型構成によって成形
品Ｗは可動型２から円滑に離脱する。That is, the molded article W is smoothly separated from the movable mold 2 by such a mold configuration.
【００２７】[0027]
【発明の効果】以上のように本発明によれば、開閉自在
な可動金型、固定金型間にキャビテイを形成し、該キャ
ビティで樹脂を成形する樹脂成形金型であって、前記金
型の一方に設けた凹部に嵌込まれ、該凹部に対して斜め
に進退する斜め押上げコアに、キャビテイ内に突出する
突起を備え、キャビティ内に突出する該突起で樹脂成形
品に設けたリブの付根に第１アンダカット部を成形し、
樹脂成形品の成形後、該樹脂成形品の突出しに連動させ
て前記斜め押上げコアを斜め前方に移動させ、該斜め押
上げコアの移動によって成形時に生じる前記リブからの
ガス抜きを行うとともに、前記リブの付根の第１アンダ
カットから前記押上げコアの突起を離すようにした樹脂
成形金型であって、前記斜め押上げコアの内部には、ス
ライドピンをその先端部が前記キャビティ内に出没自在
となるようにスプリングを介して進退自在に設け、斜め
押上げコアを嵌込む前記凹部には、前記スライドピンの
基端部と金型閉じ時に係合する規制傾斜面を設け、前記
押上げピンの前記凹部内への嵌込みで、前記スライドピ
ンの基端部を前記凹部の規制傾斜面に係合させて該スラ
イドピンの先端部を前記キャビティ内に突出させ、前記
樹脂成形品の一部に孔状の第２アンダカット部を成形
し、前記樹脂成形品の成形後、該樹脂成形品の突出しに
連動する前記斜め押上げコアの移動により、前記スライ
ドピンの基端部と凹部の規制傾斜面との係合を解除し、
該スライドピンを前記キャビティ内から後退させて第２
アンダカット部から離すように構成したので、先ず、樹
脂成形金型は、従来であればリブからガス抜きを行うた
めのガス抜き用入駒とか、成形品表面のひけ対策とか、
アンダカット部を処理するためのアンギャラピン機構等
をそれぞれ別個の部品等によって構成していたものを、
１個の斜め押上げコアですべてを処理することとなり、
従来のようにスライドピンを組込む場合に必要であった
固定型、可動型に対する型合せ作業等の手間を省くこと
が出来、可動型に対する合せ調整のみで済む。しかも、
構成が簡素で且つ安価となる。特に本発明は、斜め押上
げコアの内部には、スライドピンをその先端部がキャ ビ
ティ内に出没自在となるようにスプリングを介して進退
自在に設け、斜め押上げコアを嵌込む凹部には、スライ
ドピンの基端部と金型閉じ時に係合する規制傾斜面を設
け、押上げピンの凹部内への嵌込みで、スライドピンの
基端部を凹部の規制傾斜面に係合させて該スライドピン
の先端部をキャビティ内に突出させ、樹脂成形品の一部
に孔状の第２アンダカット部を成形し、樹脂成形品の成
形後、該樹脂成形品の突出しに連動する斜め押上げコア
の移動により、スライドピンの基端部と凹部の規制傾斜
面との係合を解除し、該スライドピンをキャビティ内か
ら後退させて第２アンダカット部から離すように構成し
たので、第１のアンダーカット部の成形と同時にキャビ
ティ内に臨むスライドピンの先端部によって、成形品に
は、第２アンダカット部である孔を成形することがで
き、第１のアンダカット部の離脱と同時にスライドピン
の先端部も斜め押上げコア内に没入し、それまで形成さ
れていた第２アンダカット部も突き出しの邪魔にはなら
ない。従って、リブの付根に突起により設けた第１アン
ダカット部、孔状の第２アンダカット部を有する樹脂成
形品を金型から円滑に離脱することができる。 As described above, according to the present invention, it can be opened and closed freely.
A cavity is formed between the movable mold and the fixed mold,
A resin molding die for molding a resin with a viscosity,
It is fitted into the recess provided on one side of the mold, and
The diagonal push-up core that advances and retracts into the cavity
With a projection, resin molding with the projection protruding into the cavity
Form the first undercut at the base of the rib provided on the product,
After molding of the resin molded product, it is linked with the protrusion of the resin molded product.
To move the diagonally pushing up core diagonally forward.
The movement of the raised core causes
While degassing, the first under of the root of the rib
Resin that separates the protrusion of the push-up core from the cut
In a molding die, a slanted push-up core has
The tip of the ride pin can freely move into and out of the cavity
It is provided to be able to move forward and backward via a spring so that
The slide pin is inserted into the recess into which the push-up core is fitted.
Providing a regulating inclined surface that engages with the base end when closing the mold,
By inserting the push-up pin into the recess, the slide pin
The base end of the slider is engaged with the regulating
Projecting the tip of the id pin into the cavity,
Forming a hole-shaped second undercut part on a part of resin molded product
Then, after the molding of the resin molded product, the protrusion of the resin molded product
The sliding of the slanted lifting core in conjunction with the
Release the engagement between the base end of the pin and the regulating slope of the recess,
The slide pin is retracted from the cavity and the second
Since it was configured so as to be separated from the undercut part, first, the resin molding die, if it is conventionally, a degassing input piece for performing degassing from the rib, a measure for sinking the molded product surface,
An undergarment pin mechanism for processing the undercut part, etc., which was composed of separate parts, etc.,
One diagonal push-up core will handle everything ,
It is possible to save the time and labor for matching the fixed mold and the movable mold, which are required when a slide pin is assembled as in the related art, and to perform only the adjustment for the movable mold. Moreover,
The configuration is simple and inexpensive. In particular, the present invention is, diagonal push-up
Inside the lower core, the distal end of the slide pin calibration bi
Advance and retreat via a spring so that it can come and go inside the tee
It is provided freely, and the slidable
A regulating slope that engages with the base end of the pin when closing the mold is provided.
Fitting the push-up pin into the recess,
The base end is engaged with the regulating inclined surface of the concave portion, and the slide pin is
Part of the resin molded product by projecting the tip of
A second undercut portion in the shape of a hole is formed in the
After forming, the diagonal push-up core interlocks with the protrusion of the resin molded product
Of the slide pin base and the recess
Disengage the slide pin from inside the cavity.
From the 2nd undercut section
Therefore, at the same time as molding the first undercut,
The tip of the slide pin facing the inside of the
Can form the hole that is the second undercut part.
Slide pin at the same time when the first undercut
The tip of the rod also sunk into the diagonal push-up core,
If the second undercut part that was removed is also in the way of protruding
Absent. Therefore, the first anchor provided by the protrusion at the base of the rib
A resin component having a ducat portion and a hole-shaped second undercut portion.
The shaped article can be smoothly separated from the mold.
【図１】本樹脂成形金型の一部縦断面図FIG. 1 is a partial longitudinal sectional view of the resin molding die.
【図２】同要部拡大図FIG. 2 is an enlarged view of the main part.
【図３】同リブの拡大図FIG. 3 is an enlarged view of the rib.
【図４】リブ成形の従来図FIG. 4 is a conventional view of rib forming.
【図５】作用図FIG. 5 is an operation diagram
【図６】図５のＡ−Ａ線断面図FIG. 6 is a sectional view taken along line AA of FIG. 5;
【符号の説明】１…固定型（金型）、 ２…可動型（金型）、 ２１…
凹部、 ４…斜め押上 げコア、 １５…スライドピン、
１５ａ…スライドピンの先端部、 １５ｂ…スライド
ピンの基端部、 １６…スプリング、 Ｕｒ…リブの第
１アンダカット部、 Ｕｏ…第２アンダカット部、 Ｗ
…成形品。 [Description of Signs] 1 ... fixed type (die), 2 ... movable type (die), 21 ...
Recessed part, 4 ... diagonal push-up core, 15 ... slide pin,
15a: tip of slide pin, 15b: slide
Base end of pin, 16 ... Spring, Ur ... No. Of rib
1 undercut section, Uo ... 2nd undercut section, W
…Molding.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−24491（ＪＰ，Ａ) 特開 昭61−98523（ＪＰ，Ａ) 実開 昭62−128819（ＪＰ，Ｕ) 実開 昭63−6823（ＪＰ，Ｕ) 実開 昭63−70316（ＪＰ，Ｕ) 実開 平１−153213（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/26 - 45/44 B29C 33/00 - 33/76 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-24491 (JP, A) JP-A-61-98523 (JP, A) JP-A 62-128819 (JP, U) JP-A 63-98819 6823 (JP, U) Japanese Utility Model Sho 63-70316 (JP, U) Japanese Utility Model Utility Model Hei 1-153213 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) B29C 45/26-45 / 44 B29C 33/00-33/76
Claims (1)
ビテイを形成し、該キャビティで樹脂を成形する樹脂成
形金型であって、前記金型の一方に設けた凹部に嵌込ま
れ、該凹部に対して斜めに進退する斜め押上げコアに、
キャビテイ内に突出する突起を備え、キャビティ内に突
出する該突起で樹脂成形品に設けたリブの付根に第１ア
ンダカット部を成形し、樹脂成形品の成形後、該樹脂成
形品の突出しに連動させて前記斜め押上げコアを斜め前
方に移動させ、該斜め押上げコアの移動によって成形時
に生じる前記リブからのガス抜きを行うとともに、前記
リブの付根の第１アンダカットから前記押上げコアの突
起を離すようにした樹脂成形金型であって、 前記斜め押上げコアの内部には、スライドピンをその先
端部が前記キャビティ内に出没自在となるようにスプリ
ングを介して進退自在に設け、 斜め押上げコアを嵌込む前記凹部には、前記スライドピ
ンの基端部と金型閉じ時に係合する規制傾斜面を設け、 前記押上げピンの前記凹部内への嵌込みで、前記スライ
ドピンの基端部を前記凹部の規制傾斜面に係合させて該
スライドピンの先端部を前記キャビティ内に突出させ、
前記樹脂成形品の一部に孔状の第２アンダカット部を成
形し、 前記樹脂成形品の成形後、該樹脂成形品の突出しに連動
する前記斜め押上げコアの移動により、前記スライドピ
ンの基端部と凹部の規制傾斜面との係合を解除し、該ス
ライドピンを前記キャビティ内から後退させて第２アン
ダカット部から離すように構成した、 こ とを特徴とする樹脂成形金型。1. A cap between a movable mold and a fixed mold that can be freely opened and closed.
Forming resin and molding resin in the cavity
A mold, fitted in a recess provided in one of the molds
To the diagonal push-up core that moves obliquely with respect to the recess,
It has a projection that projects into the cavity and projects into the cavity.
The first protrusion is provided at the base of the rib provided on the resin molded product by the projection.
After molding the resin cut part and molding the resin molded product,
The diagonal push-up core is moved diagonally forward in conjunction with the
During molding by moving the obliquely pushing up core.
While degassing from the rib that occurs in the
From the first undercut at the base of the rib,
A resin molding die which is separated from the starting portion, wherein a slide pin is provided inside the obliquely pushing up core.
Split the end so that it can freely enter and exit the cavity.
The slide pin is provided in the concave portion, which is provided to be able to advance and retreat via
A restricting inclined surface that engages with the base end of the pin when the mold is closed is provided.
The base end of the doping pin is engaged with the regulating slope
The tip of the slide pin projects into the cavity,
A second undercut portion having a hole shape is formed in a part of the resin molded product.
Shape and interlock with the protrusion of the resin molded product after the molding of the resin molded product
Movement of the oblique push-up core causes the slide pin
Release the engagement between the base end of the
The ride pin is retracted from the cavity and the second
It was constructed away from Dakatto portion, the resin molding die, wherein the this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306763A JP2925128B2 (en) | 1993-12-07 | 1993-12-07 | Resin mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306763A JP2925128B2 (en) | 1993-12-07 | 1993-12-07 | Resin mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07156219A JPH07156219A (en) | 1995-06-20 |
| JP2925128B2 true JP2925128B2 (en) | 1999-07-28 |
Family
ID=17961000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5306763A Expired - Fee Related JP2925128B2 (en) | 1993-12-07 | 1993-12-07 | Resin mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2925128B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030049097A (en) * | 2001-12-14 | 2003-06-25 | 현대자동차주식회사 | Ejecting device of metallic pattern for bumper |
| KR100872939B1 (en) * | 2007-07-25 | 2008-12-08 | 기아자동차주식회사 | Mold for bumper of vehicle and therefore bumper of vehicle |
| WO2012117404A1 (en) * | 2011-03-01 | 2012-09-07 | Keter Plastic Ltd. | Injection molded panel, a mold and a method for its manufacture |
| JP5776299B2 (en) * | 2011-04-20 | 2015-09-09 | いすゞ自動車株式会社 | Injection molding method and injection mold used therefor |
| FR2989449B1 (en) * | 2012-04-11 | 2018-05-11 | Valeo Vision | TRANSPARENT ELEMENT FOR A VEHICLE LIGHTING AND / OR SIGNALING DEVICE, COMPRISING AN ANTI-WITHDRAWAL MEANS, AND A MOLD FOR THE PRODUCTION OF SUCH AN ELEMENT |
| CN104249431A (en) * | 2013-06-25 | 2014-12-31 | 苏州汉扬精密电子有限公司 | Double-ejection female die slider mechanism |
| CN111633927A (en) * | 2019-03-01 | 2020-09-08 | 苏州汉扬精密电子有限公司 | Insert core-pulling structure |
| CN110549568A (en) * | 2019-08-27 | 2019-12-10 | 宁波米勒模具制造有限公司 | Take demoulding mechanism of back-off product |
-
1993
- 1993-12-07 JP JP5306763A patent/JP2925128B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07156219A (en) | 1995-06-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990426 |
|
| LAPS | Cancellation because of no payment of annual fees |