JPH0514827Y2 - - Google Patents
Info
- Publication number
- JPH0514827Y2 JPH0514827Y2 JP1987052464U JP5246487U JPH0514827Y2 JP H0514827 Y2 JPH0514827 Y2 JP H0514827Y2 JP 1987052464 U JP1987052464 U JP 1987052464U JP 5246487 U JP5246487 U JP 5246487U JP H0514827 Y2 JPH0514827 Y2 JP H0514827Y2
- Authority
- JP
- Japan
- Prior art keywords
- extrusion
- holder
- pin
- plate
- sprue
- 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
- 238000001125 extrusion Methods 0.000 claims description 77
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案はプラスチツクの射出成形に用いる金
型に関し、さらに詳しくは金型の押出機構の改良
に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a mold used for plastic injection molding, and more specifically relates to an improvement in the extrusion mechanism of the mold.
（従来の技術）
プラスチツク成形用の射出成形金型において
は、製品押出後にスプルーの押出をおこない、最
初の製品押出時にゲートカツトをおこなう２段押
出式の押出機構をそなえたものがあり、第８図は
この２段押出式としてよく用いられているものの
構造を示す。図中、１は可動型取付板、２はスペ
ーサブロツク、３は可動型取付板であり、このス
ペーサブロツク２で囲繞された空間内には、別々
の押出板４，５が前後方向に移動自在に収容さ
れ、押出板４には押出板５をすきまをもつて貫通
する製品押出ピン６を突設し、押出板５にはスプ
ルー押出ピン７を突設してある。スペーサブロツ
ク２の段部２ａに後面５ａが当接した状態の押出
板５と、可動型取付板１に後面４ａが当接した状
態の押出板４との間には、ゲートカツトストロー
クに相当する所定距離Ｓだけのすきまを設けてあ
る。８は図示しない固定型型板のスプルーブツシ
ユにより成形されたスプルー、９は固定型型板と
可動型型板３との間の成形空間内で成形された製
品、１０はスプルー８と製品９間のゲート、１１
はスプルー８の後端部のスプループラー部であ
る。押出時にはノツクアウトロツド１２の前方
（矢印Ｘ方向）への相対移動により、先ず押出板
４が前進駆動されて製品９が製品押出ピン６に押
されてゲート１０部が切断され、製品９が可動型
型板３により押出されたのち、押出板５が押出板
４により押されてスプルー押出ピン７がスプルー
８を押出すのである。(Prior art) Some injection molding molds for plastic molding are equipped with a two-stage extrusion mechanism that extrudes the sprue after extruding the product and performs gate cutting during the first extrusion of the product, as shown in Figure 8. shows the structure of this two-stage extrusion type which is often used. In the figure, 1 is a movable mounting plate, 2 is a spacer block, and 3 is a movable mounting plate. Within the space surrounded by this spacer block 2, separate extrusion plates 4 and 5 are movable in the front and back direction. The extrusion plate 4 has a product extrusion pin 6 protruding through the extrusion plate 5 with a gap, and the extrusion plate 5 has a sprue extrusion pin 7 protruding therefrom. There is a gap between the extrusion plate 5 with its rear surface 5a in contact with the stepped portion 2a of the spacer block 2 and the extrusion plate 4 with its rear surface 4a in contact with the movable mounting plate 1, which corresponds to the gate cut stroke. A gap of a predetermined distance S is provided. 8 is a sprue formed by a sprue bush of a fixed mold plate (not shown); 9 is a product molded in the molding space between the fixed mold plate and the movable mold plate 3; and 10 is a sprue 8 and a product 9. gate between, 11
is a sprue puller portion at the rear end of the sprue 8. During extrusion, the relative movement of the knockout rod 12 forward (in the direction of arrow X) first drives the extrusion plate 4 forward, and the product 9 is pushed by the product extrusion pin 6, cutting the gate 10, and the product 9 is movable. After being extruded by the template plate 3, the extrusion plate 5 is pushed by the extrusion plate 4, and the sprue extrusion pin 7 extrudes the sprue 8.
（考案が解決しようとする問題点）
ところが上記構成の２段押出式の射出成形金型
は、２個の押出板４および５を用いているため、
大きなスペースを必要とするうえ、両押出板にそ
れぞれ別個のリターンピンあるいはリターンスプ
リングを必要とするので、金型の製作費および重
量がかさむという問題があつた。(Problems to be solved by the invention) However, since the two-stage extrusion type injection mold having the above configuration uses two extrusion plates 4 and 5,
This method requires a large space and also requires separate return pins or return springs for both extrusion plates, which increases the manufacturing cost and weight of the mold.
この考案は上記従来の問題点を解決するもの
で、押出機構の構造が小型簡潔で、所要スペース
が小さくてすみ、金型の製作費および重量の低減
化を達成できるとともに、押出板等の押圧駆動機
構も小型簡潔なものでよく、小型射出成形機に特
に好適な２段押出式の射出成形金型を提供するこ
とを目的とする。 This invention solves the above-mentioned conventional problems.The structure of the extrusion mechanism is small and simple, requiring less space, reducing mold production costs and weight, and reducing the pressure of the extrusion plate, etc. The drive mechanism may also be small and simple, and the object is to provide a two-stage extrusion type injection molding die that is particularly suitable for small-sized injection molding machines.
（問題点を解決するための手段）
上記目的を達成するためにこの考案の射出成形
金型は、製品押出ピンを突設した押出板に、スプ
ルー押出ピンを突設したピンホルダーを前後方向
に移動自在に嵌込み、上記押出板に上記ピンホル
ダーの前側への移動を制限する前側係止面部を設
けるとともに、可動型取付板に上記ピンホルダー
の後側への移動を制限する後側係止面部を設け、
上記ピンホルダーの後面から所定距離離間する押
圧面と射出成形金型の中心に設けられたノツクア
ウトロツドの先端に対向する駆動面とをそなえた
押出ホルダーを、上記押出板の後面に固着する構
成とした。(Means for Solving the Problems) In order to achieve the above object, the injection mold of this invention has a pin holder with a sprue ejection pin protruding from an extrusion plate with a product ejection pin protruding from it in the front and back direction. A front locking surface part that is movably fitted and restricts forward movement of the pin holder is provided on the extrusion plate, and a rear locking surface part that restricts rearward movement of the pin holder is provided on the movable mounting plate. Provide a surface section,
An extrusion holder is fixed to the rear surface of the extrusion plate, the extrusion holder having a pressing surface spaced a predetermined distance from the rear surface of the pin holder and a driving surface facing the tip of the knock out rod provided at the center of the injection mold. And so.
この考案において前側とは固定金型のある側を
称し、後側とは可動型取付板のある側を称する。 In this invention, the front side refers to the side where the fixed mold is located, and the rear side refers to the side where the movable mold mounting plate is located.
（作用）
この考案の射出成形金型においては、押出時に
ノツクアウトロツドの先端により押出ホルダーの
駆動面を押圧駆動して、押出ホルダーを前側方向
に押せば、押出板がこの押出ホルダーにより押さ
れて製品押出ピンが製品を押出し、ゲート部が切
断される。ピンホルダーと押出ホルダーの押圧面
間のすきまが零になつた後、ピンホルダーが押出
ホルダーに押され、スプルー押出ピンがスプルー
を押出して、押出工程が完了する。戻し行程にお
いては、押出板を公知のリターンピンあるいはス
プリングにより戻せば、ピンホルダーは押出板の
前側係止面部に係合して押出板と一体となつて後
退し、可動型取付板の後側係止面部に当接して後
退位置に保持される。このようにピンホルダーは
押出板と押出ホルダーとの間に保持され、押出板
は１個で済む。(Function) In the injection mold of this invention, when extruding, the tip of the knock-out rod pushes the drive surface of the extrusion holder to push the extrusion holder forward, and the extrusion plate is pushed by the extrusion holder. The product ejecting pin pushes out the product and the gate part is cut. After the gap between the pressing surfaces of the pin holder and the extrusion holder becomes zero, the pin holder is pushed by the extrusion holder, the sprue extrusion pin extrudes the sprue, and the extrusion process is completed. In the return stroke, when the push-out plate is returned by a known return pin or spring, the pin holder engages with the front locking surface of the push-out plate and moves back together with the push-out plate, causing the rear side of the movable mounting plate to move back. It comes into contact with the locking surface and is held in the retracted position. In this way, the pin holder is held between the extrusion plate and the extrusion holder, and only one extrusion plate is required.
（実施例）
以下第１図乃至第７図によりこの考案の一実施
例を説明する。(Example) An example of this invention will be described below with reference to FIGS. 1 to 7.
図中、第８図と同一部分または相当部分には、
第８図と同一符号を付してある。押出板１５は図
示しない止めねじで連結された押出板前１６と押
出板後１７とから成り、この押出板１５には製品
押出ピン６が突設固着してある。１８はピンホル
ダーで、略角棒状の本体１９の中央に小円柱状の
ボス２０を突設して成り、このピンホルダー１８
にはスプルー押出ピン７が突設固着してある。２
１はピンホルダー１８の中心部にねじ込んだ止め
ねじで、スプルー押出ピン７の固定のためのもの
である。ピンホルダー１８のボス２０部は、押出
板前１６の中央に穿設した穴２２に少量のすきま
をもつて嵌合し、本体１９部は、押出板後１７の
中央部に穿設した長円形の穴２３（第２図参照）
にすきまをもつて嵌合している。本体１９の前面
１９ａに対向する押出板前１６の後面部には、本
体１９に係合してピンホルダー１８の前側への移
動を制限する前側係止面１６ａが形成されてい
る。また本体１９の後面１９ｂに対向する可動型
取付板１の前面部には、本体１９に係合してピン
ホルダー１８の後側への移動を制限する後側係止
面１ｂが形成されている。２４は押出ホルダー
で、取付けねじ２５により押出板後１７に固着連
結され、ピンホルダー１８の本体１９が嵌入でき
る巾の溝２６をそなえ、押出板１５の戻り状態に
おいて第１図示のように本体１９の後面１９ｂと
溝２６の底面である押圧面２６ａとの間には、ゲ
ートカツトストロークに相当する所定距離Ｓだけ
のすきまを設けてある。そして押出ホルダー２４
の後面である駆動面２４ａ（第１図参照）は、射
出成形金型の中心に設けられたノツクアウトロツ
ド１２の先端に対向している。 In the figure, the same or equivalent parts as in Figure 8 are
The same reference numerals as in FIG. 8 are given. The extrusion plate 15 consists of a front extrusion plate 16 and a rear extrusion plate 17 connected by a set screw (not shown), and a product extrusion pin 6 is fixedly protruding from the extrusion plate 15. Reference numeral 18 denotes a pin holder, which has a substantially rectangular bar-shaped main body 19 with a small cylindrical boss 20 protruding from the center.
A sprue ejector pin 7 is fixedly protruding from the sprue. 2
1 is a set screw screwed into the center of the pin holder 18 for fixing the sprue ejecting pin 7. The boss 20 of the pin holder 18 fits into the hole 22 drilled in the center of the front extrusion plate 16 with a small gap, and the main body 19 fits into the oval hole 22 bored in the center of the rear extrusion plate 17. Hole 23 (see Figure 2)
They are fitted with a gap. A front locking surface 16a that engages with the main body 19 to restrict forward movement of the pin holder 18 is formed on the rear surface of the front extrusion plate 16 facing the front surface 19a of the main body 19. Further, a rear locking surface 1b is formed on the front surface of the movable mounting plate 1 facing the rear surface 19b of the main body 19, which engages with the main body 19 and restricts the movement of the pin holder 18 to the rear side. . Reference numeral 24 denotes an extrusion holder, which is fixedly connected to the rear extrusion plate 17 by a mounting screw 25, and has a groove 26 wide enough to fit the main body 19 of the pin holder 18, and when the extrusion plate 15 is in the returned state, the main body 19 A gap of a predetermined distance S corresponding to the gate cut stroke is provided between the rear surface 19b and the pressing surface 26a which is the bottom surface of the groove 26. and extrusion holder 24
The rear drive surface 24a (see FIG. 1) faces the tip of the knockout rod 12 provided at the center of the injection mold.
上記構成の金型においては、図示しない固定型
型板との協働により第１図示のように製品９を射
出成形後、可動型部分の後退に伴うノツクアウト
ロツド１２の矢印Ｘ方向への相対移動により、押
出ホルダー２４の駆動面２４ａがノツクアウトロ
ツド１２の先端により押圧駆動され、この押出ホ
ルダー２４を介して先ず押出板１５が押されて第
６図に示すように製品９が製品押出ピン６により
押出される。このときスプルー８はスプループラ
ー部１１により可動型型板３にロツクされている
のでゲート１０が切断され、スプルー押出ピン７
およびピンホルダー１８は押出開始前の戻り位置
に保持される。押出ホルダー２４がゲートカツト
ストロークＳ分だけ矢印Ｘ方向に移動すると、押
圧面２６ａがピンホルダー１８の本体１９の後面
１９ｂに当接して押圧するので、ピンホルダー１
８も矢印Ｘ方向に押され、第７図に示すようにス
プルー８がスプルー押出ピン７により押出され
る。これによつてゲートカツトを含む２段押出工
程は完了するので、可動型部分の前進により図示
しないリターンピンあるいはリターンスプリング
等の戻し手段により押出板１５を第１図示の戻り
位置に復帰させる。この状態でピンホルダー１８
は、押出板１５の前側係止面１６ａと可動型取付
板１の後側係止面１ｂとにより挟持され所定のセ
ツト位置に保持されるので、次サイクルの射出成
形をおこなうことができる。 In the mold having the above configuration, after the product 9 is injection molded as shown in the first figure by cooperation with a fixed mold plate (not shown), the knock out rod 12 is moved relative to the arrow X direction as the movable mold part retreats. Due to the movement, the drive surface 24a of the extrusion holder 24 is pushed and driven by the tip of the knockout rod 12, and the extrusion plate 15 is first pushed through this extrusion holder 24, and the product 9 is pushed into the product extrusion pin as shown in FIG. Extruded by 6. At this time, since the sprue 8 is locked to the movable mold plate 3 by the sprue puller part 11, the gate 10 is cut and the sprue ejection pin 7
And the pin holder 18 is held at the return position before the start of extrusion. When the extrusion holder 24 moves in the direction of the arrow X by the gate cut stroke S, the pressing surface 26a contacts and presses the rear surface 19b of the main body 19 of the pin holder 18, so that the pin holder 1
8 is also pushed in the direction of arrow X, and the sprue 8 is pushed out by the sprue pushing pin 7 as shown in FIG. As a result, the two-stage extrusion process including the gate cut is completed, and the movable mold portion moves forward to return the extrusion plate 15 to the return position shown in the first figure by a return means such as a return pin or a return spring (not shown). In this state, pin holder 18
is held in a predetermined set position by being held between the front locking surface 16a of the extrusion plate 15 and the rear locking surface 1b of the movable mold mounting plate 1, so that the next cycle of injection molding can be performed.
この考案は上記実施例に限定されるものではな
く、たとえばピンホルダー１８、押出板１５、押
出ホルダー２４等の具体的形状は上記以外のもの
としてもよい。 This invention is not limited to the above-described embodiment, and the specific shapes of the pin holder 18, extrusion plate 15, extrusion holder 24, etc. may be other than those described above.
（考案の効果）
以上説明したようにこの考案によれば、スプル
ー押出ピンを取付けたピンホルダーを製品押出ピ
ンを取付けた押出板に所定距離相対移動できるよ
うに取付けて２段押出をおこなう構成としたの
で、押出板は１個で済むため、押出機構の構造が
小型簡潔で所要スペースが小さくて済み、金型の
製作費および重量の低減化を達成できる。また押
出時の押出板およびピンホルダーの押圧駆動は、
射出成形金型の中心に設けられたノツクアウトロ
ツドによりおこなうことができ、押圧駆動機構は
小型簡潔なものでよく、小型射出成形機に特に好
適な２段押出式の射出成形金型が得られる。(Effects of the invention) As explained above, according to this invention, the pin holder with the sprue ejection pin attached is attached to the extrusion plate with the product ejection pin attached so that it can move a predetermined distance relative to the extrusion plate to perform two-stage extrusion. Therefore, since only one extrusion plate is required, the structure of the extrusion mechanism is small and simple, requiring less space, and the manufacturing cost and weight of the mold can be reduced. In addition, the pressing drive of the extrusion plate and pin holder during extrusion is
This can be carried out using a knockout rod provided at the center of the injection mold, and the pressing drive mechanism can be small and simple, resulting in a two-stage extrusion type injection mold that is particularly suitable for small-sized injection molding machines. .
第１図乃至第７図はこの考案の一実施例を示
し、第１図は押出開始前の金型の縦断面図、第２
図は第１図の矢視Ａ−Ａ側面図、第３図は同じく
Ｂ−Ｂ線断面図、第４図はピンホルダーの平面
図、第５図は押出ホルダーの平面図、第６図は製
品押出状態の金型の縦断面図、第７図はスプルー
押出状態の金型の縦断面図、第８図は従来の金型
の例を示す縦断面図である。
１……可動型取付板、１ｂ……後側係止面、６
……製品押出ピン、７……スプルー押出ピン、８
……スプルー、９……製品、１０……ゲート、１
５……押出板、１６ａ……前側係止面、１８……
ピンホルダー、１９……本体、２０……ボス、２
２……穴、２３……穴、２４……押出ホルダー、
２４ａ……駆動面、２６……溝、２６ａ……押圧
面。
1 to 7 show an embodiment of this invention. FIG. 1 is a vertical cross-sectional view of a die before extrusion starts. FIG.
The figures are a side view taken along the line A-A in Fig. 1, Fig. 3 is a cross-sectional view taken along the line B-B in Fig. 1, Fig. 4 is a plan view of the pin holder, Fig. 5 is a plan view of the extrusion holder, Fig. 6 is a vertical cross-sectional view of the die in the state of extruding the product, Fig. 7 is a vertical cross-sectional view of the die in the state of extruding the sprue, and Fig. 8 is a vertical cross-sectional view showing an example of a conventional die. 1 ... movable die mounting plate, 1b ... rear locking surface, 6
……Product ejection pin, 7……Sprue ejection pin, 8
……Sprue, 9……Product, 10……Gate, 1
5: Push-out plate; 16a: Front locking surface; 18:
Pin holder, 19...Main body, 20...Boss, 2
2...hole, 23...hole, 24...extrusion holder,
24a...drive surface, 26...groove, 26a...pressure surface.
Claims (1)
出ピンを突設したピンホルダーを前後方向に移動
自在に嵌込み、上記押出板に上記ピンホルダーの
前側への移動を制限する前側係止面部を設けると
ともに、可動型取付板に上記ピンホルダーの後側
への移動を制限する後側係止面部を設け、上記ピ
ンホルダーの後面から所定距離離間する押圧面と
射出成形金型の中心に設けられたノツクアウトロ
ツドの先端に対向する駆動面とをそなえた押出ホ
ルダーを、上記押出板の後面に固着したことを特
徴とする射出成形金型。 A pin holder having a protruding sprue ejecting pin is fitted into an extruding plate having a protruding product ejecting pin so as to be movable in the front and rear direction, and a front locking surface part is provided on the extruding plate to restrict forward movement of the pin holder. At the same time, the movable mounting plate is provided with a rear locking surface portion for restricting the movement of the pin holder to the rear side, and a pressing surface portion is provided at a predetermined distance from the rear surface of the pin holder, and a rear locking surface portion is provided at the center of the injection mold. An injection molding die characterized in that an extrusion holder is fixed to the rear surface of the extrusion plate, the extrusion holder having a driving surface facing the tip of the nozzle out rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987052464U JPH0514827Y2 (en) | 1987-04-07 | 1987-04-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987052464U JPH0514827Y2 (en) | 1987-04-07 | 1987-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63161713U JPS63161713U (en) | 1988-10-21 |
| JPH0514827Y2 true JPH0514827Y2 (en) | 1993-04-20 |
Family
ID=30877654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987052464U Expired - Lifetime JPH0514827Y2 (en) | 1987-04-07 | 1987-04-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0514827Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5724026B2 (en) * | 1977-05-04 | 1982-05-21 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5724026U (en) * | 1980-07-18 | 1982-02-08 |
-
1987
- 1987-04-07 JP JP1987052464U patent/JPH0514827Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5724026B2 (en) * | 1977-05-04 | 1982-05-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63161713U (en) | 1988-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000052384A (en) | Injection molding die for molded product with undercut and undercut processing method for injection molded product | |
| JPH0514827Y2 (en) | ||
| CN211138010U (en) | Secondary sliding block demoulding mechanism for complex area of automobile rearview mirror | |
| CN210333910U (en) | Flash-free forming device for automobile sliding fork | |
| CN210679541U (en) | Cutting sprue mechanism in mold | |
| CN113510899A (en) | Cask injection mold | |
| JP3161490B2 (en) | Mold equipment | |
| JP2670363B2 (en) | Gate cutting device for plastic mold | |
| CN218462871U (en) | Injection mold for outer shell | |
| CN217621968U (en) | High-efficient demoulding structure of injection mold's slider area department section of thick bamboo | |
| CN216860429U (en) | Refrigerator switch box injection mold convenient to ejection of compact | |
| CN217803049U (en) | Plastic mold die casting device | |
| CN219903202U (en) | Device for processing rearview mirror | |
| JPH0533313Y2 (en) | ||
| CN219256328U (en) | Injection mold for household article structural member | |
| CN215039800U (en) | Cask injection mold | |
| CN221212601U (en) | Injection mold is used in processing of car battery housing end cover | |
| CN218429774U (en) | Die set | |
| CN220837867U (en) | Die casting die pitched roof structure convenient to dismouting | |
| CN216139351U (en) | Product ejection device for automobile connector mold | |
| JPS6212571Y2 (en) | ||
| JPS5940196Y2 (en) | Undercut processing structure in injection molds | |
| CN221048972U (en) | Front door switch panel mold demolding structure of automobile | |
| CN214872420U (en) | Precise injection mold for assembled shell of automobile muffler | |
| CN215151515U (en) | Interior back-off goes out mode structure |