JPH028737Y2 - - Google Patents
Info
- Publication number
- JPH028737Y2 JPH028737Y2 JP1983173641U JP17364183U JPH028737Y2 JP H028737 Y2 JPH028737 Y2 JP H028737Y2 JP 1983173641 U JP1983173641 U JP 1983173641U JP 17364183 U JP17364183 U JP 17364183U JP H028737 Y2 JPH028737 Y2 JP H028737Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- plate
- movable mold
- center
- extrusion
- 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
Links
- 238000001125 extrusion Methods 0.000 claims description 40
- 230000005484 gravity Effects 0.000 claims description 17
- 238000001746 injection moulding Methods 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
本考案は射出成形機における突き出し装置の改
良に係るものである。[Detailed Description of the Invention] The present invention relates to an improvement of an ejection device in an injection molding machine.
第１図は従来の射出成形機の型締装置を示し、
ａは固定型盤、ｂはシリンダ、ｃは同固定型盤ａ
と同シリンダｂとを連結するタイバー、ｄはタン
ク、ｅはプレフイルバルブ、ｆはプースタラム、
ｇは前記シリンダｂ内のラム、ｈは同ラムｇに取
付けたエジエクタボツクス、ｉは同エジエクタボ
ツクスｈ内のエジエクタラム、ｊは同エジエクタ
ラムｉに取付けた押出しプレート、ｋは同押出し
プレートｊに基部が当接している押出しロツドで
ある。 Figure 1 shows the mold clamping device of a conventional injection molding machine.
a is a fixed plate, b is a cylinder, c is the same fixed plate a
and the same cylinder b, d is the tank, e is the prefill valve, f is the pusher ram,
g is the ram in the cylinder b, h is the ejector box attached to the ejector box g, i is the ejector ram in the ejector box h, j is the extrusion plate attached to the ejector ram i, and k is the extrusion plate j. It is an extruded rod with abutting base.
ｍは前記タイバーｃにより前後進可能に支持さ
れるとともに、前記エジエクタボツクスｈに取付
けた可動型盤で、前記押出しロツドｋは同可動型
盤ｍの孔に摺動自在に嵌挿されている。またｎは
同押出しロツドｋに当接している突出しプレー
ト、Ｐは前記可動型盤ｍに取付けた金型、ｏ，ｕ
は前記突出しプレートｎに基部を固定した突出し
ロツドで、同突出しロツドｏ，ｕは前記金型ｐの
孔に摺動自在に嵌挿されている。 m is a movable mold platen which is supported by the tie bar c so as to be movable back and forth and is attached to the ejector box h, and the extrusion rod k is slidably inserted into the hole of the movable mold platen m. . In addition, n is the protruding plate that is in contact with the extrusion rod k, P is the mold attached to the movable mold board m, o, u
is a protruding rod whose base is fixed to the protruding plate n, and the protruding rods o and u are slidably inserted into the holes of the mold p.
またｑは前記固定型盤ａに取付けた金型で、可
動型盤ｍを固定型盤ａの方向に移動させ、金型
ｐ，ｑを閉じて締付力を与えたのち、金型ｐ，ｑ
内に樹脂を射出して、所定の形状の成形品ｒを得
るように、また可動型盤ｍを逆方向に移動させて
金型ｐ，ｑを開き、次いでエジエクタラムｉを固
定型盤ａの方向に移動させ、押出しプレートｊ、
押出しロツドｋ、突出しプレートｎ、突出しロツ
ドｏ，ｕを同方向に押出して、成形品ｒを金型ｐ
から取出すようになつている。 Further, q is a mold attached to the fixed mold platen a, and after moving the movable mold platen m in the direction of the fixed mold platen a, closing the molds p and q and applying a tightening force, the molds p and q
The movable mold platen m is moved in the opposite direction to open the molds p and q, and then the ejectalum i is moved in the direction of the fixed mold platen a so as to inject the resin into the molded product r of a predetermined shape. and extrusion plate j,
The extrusion rod k, the ejection plate n, and the ejection rods o and u are extruded in the same direction, and the molded product r is placed in the mold p.
It is designed to be taken out from
而して可動型盤ｍにおける押出しロツドｋの挿
通される穴の径は、同押出しロツドｋが円滑に
動くように押出しロツドｋより少し大径に形成さ
れている。 The diameter of the hole in the movable mold board m through which the extrusion rod k is inserted is slightly larger than that of the extrusion rod k so that the extrusion rod k can move smoothly.
このため金型ｐから成形品ｒを突出す量が大き
い金型ｐにおいては、第３図に示す如き全長に亘
つて密度が均一な丸棒より構成された従来の押出
しロツドｋにあつては、その重心Ｇが可動型盤ｍ
の端面より外側に出る場合、押出しロツドｋの外
径と可動型盤ｍの押出しロツドｈの挿通される穴
の径とのガタだけ押出しロツドｋが傾き、第２
図の部分Ａにおいて強い当りが生じ、押出しロツ
ドｋが曲つたり、可動型盤ｍにおける押出しロツ
ドｋの挿通穴が異常摩耗を生起することがあ
る。 For this reason, in a mold p in which the molded product r is projected from the mold p by a large amount, a conventional extrusion rod k made of a round bar with uniform density over its entire length as shown in FIG. , whose center of gravity G is the movable mold plate m
When the extrusion rod k is pushed outward from the end surface of the extrusion rod k, the extrusion rod k is tilted by the play between the outer diameter of the extrusion rod k and the diameter of the hole through which the extrusion rod h of the movable mold plate m is inserted, and
A strong hit may occur in part A of the figure, which may bend the extrusion rod k or cause abnormal wear of the insertion hole of the extrusion rod k in the movable mold platen m.
この異常摩耗が更に進行すると、押出しロツド
ｋの折損、可動型盤ｍの損傷が生起する。 If this abnormal wear progresses further, breakage of the extrusion rod k and damage to the movable mold plate m occur.
本考案はこのような問題点を解決するために提
案されたもので、可動型盤の孔に摺動自在に嵌挿
され、成形品を金型から取出す突出しロツドを固
定した突出しプレートの背面に当接して同プレー
トを移動させる押出しロツドを備えてなる射出成
形機の突き出し装置において、前記押出しロツド
の重心を、同ロツドの長手方向中心より偏倚せし
めるとともに、前記可動型盤の孔内に常時位置す
るように構成してなることを特徴とする射出成形
機の突き出し装置に係るものである。 The present invention was proposed in order to solve these problems.The projector plate is slidably inserted into the hole of the movable mold plate and is attached to the back of the ejector plate to which the ejector rod for ejecting the molded product from the mold is fixed. An ejection device for an injection molding machine comprising an extrusion rod that abuts and moves the plate, the center of gravity of the extrusion rod being offset from the longitudinal center of the rod and always positioned within the hole of the movable mold plate. This invention relates to an ejecting device for an injection molding machine, characterized in that it is configured to do so.
本考案に係る射出成形機の突き出し装置におい
ては前記したように、成形品を金型から取出す突
出しロツドを固定された突出しプレートの背面に
当接し、同突出しプレートを移動させるように、
可動型盤に設けられた孔に摺動自在に嵌挿された
押し出しロツドの重心を、同ロツドの長手方向中
心より偏倚せしめるとともに、前記可動型盤の孔
内に常時位置するように構成したので、成形品の
突出しストロークの長い金型においても、前記押
出しロツドの伸長時において、同ロツドの重心が
可動型盤から外れることがなく、押出しロツドの
傾きが防止される。 As described above, in the ejecting device for an injection molding machine according to the present invention, the ejecting rod for ejecting the molded product from the mold is brought into contact with the back surface of the fixed ejecting plate, and the ejecting plate is moved.
The center of gravity of the extrusion rod, which is slidably inserted into the hole provided in the movable mold platen, is offset from the longitudinal center of the rod, and is always positioned within the hole of the movable mold platen. Even in a mold having a long ejection stroke for a molded product, the center of gravity of the extrusion rod does not come off the movable mold plate when the extrusion rod is extended, and the extrusion rod is prevented from tilting.
従つて前記押出しロツドと、可動型盤における
同押出しロツドの嵌挿された孔の端縁との間の強
い当りがなくなり、可動型盤の異常摩擦や、押出
しロツドの折損が防止される。 Therefore, there is no strong contact between the extrusion rod and the edge of the hole in the movable mold plate into which the extrusion rod is inserted, and abnormal friction of the movable mold plate and breakage of the extrusion rod are prevented.
以下本考案を図示の実施例について説明する。 The present invention will be described below with reference to the illustrated embodiments.
第４図に示す実施例において、k1は射出成形機
における可動型盤の孔に摺動自在に嵌挿され、且
つ成形品を金型から取出す突出しロツドを固定し
た押出しプレートの背面に当接し、同プレートを
移動させる押出しロツドで、同ロツドk1の片側の
中心部を中空部に形成し、同ロツドk1の重心をロ
ツドの長手方向中心より偏倚して位置せしめると
ともに、前記可動型盤の孔内にロツド重心が常時
位置するように構成したものである。 In the embodiment shown in FIG. 4, k1 is slidably inserted into a hole in a movable mold plate of an injection molding machine, and abuts against the back surface of an extrusion plate to which a protruding rod for ejecting a molded product from the mold is fixed. , is an extrusion rod for moving the plate, the center of one side of the rod k1 is formed into a hollow part, the center of gravity of the rod k1 is offset from the longitudinal center of the rod, and the movable mold platen is The center of gravity of the rod is always located within the hole.
第５図に示す実施例は、押出しロツドk2の中心
部を空洞部に形成し、同空洞部２の片側に前記押
出しロツドk2の重心より比重の大きい重錘３をセ
ツトして、同ロツドk2の重心をロツドの長手方向
中心より偏倚して位置せしめているとともに前記
可動型盤の孔内にロツド重心が常時位置するよう
に構成したものである。 In the embodiment shown in FIG. 5, the center of the extrusion rod k2 is formed into a hollow part, and a weight 3 having a specific gravity larger than the center of gravity of the extrusion rod k2 is set on one side of the hollow part 2. The center of gravity of the rod k2 is located offset from the longitudinal center of the rod, and the center of gravity of the rod is always located within the hole of the movable mold plate.
第６図に示す実施例においては、押出しロツド
k3の片側を小径部４に形成して、同ロツドK3の
重心をその長手方向中心より偏倚して位置せしめ
るとともに、前記可動型盤の孔内にロツド重心が
常時位置するように構成したものである。 In the embodiment shown in FIG.
One side of the rod K 3 is formed into a small diameter portion 4 so that the center of gravity of the rod K 3 is offset from its longitudinal center, and the center of gravity of the rod is always located within the hole of the movable mold plate. It is something.
更に第７図に示す実施例は、押出しロツドk4の
中心に空洞部５を設け、同空洞部５内にその長手
方向に亘つて配設された螺桿６に重錘７を螺装
し、同螺桿６を螺回して重錘７を移動せしめ、前
記ロツドk4の重心をその長手方向中心より偏倚し
て位置せしめるとともに、前記可動型盤の孔内に
ロツド重心が常時位置するように構成したもので
ある。 Further, in the embodiment shown in FIG. 7, a hollow portion 5 is provided at the center of the extrusion rod k4 , and a weight 7 is screwed into a screw rod 6 disposed within the hollow portion 5 in the longitudinal direction. The weight 7 is moved by screwing the screw rod 6 so that the center of gravity of the rod k4 is offset from its longitudinal center, and the center of gravity of the rod is always located within the hole of the movable mold plate. This is what I did.
図示の実施例においては前記したように射出成
形機の押出しロツドk1，k2，k3，k4の重心がロツ
ドの長手方向中心より偏倚して位置せしめられ、
且つ前記可動型盤の孔内にロツド重心が常時位置
するように構成されているので、成形品の突出し
ストロークの長い金型においても、前記押出しロ
ツドの傾きが防止され、同ロツドの折損、及び同
ロツドの挿貫された可動型盤の異常摩擦が防止さ
れるものである。 In the illustrated embodiment, as described above, the centers of gravity of the extrusion rods k 1 , k 2 , k 3 , k 4 of the injection molding machine are located offset from the longitudinal center of the rods,
In addition, since the center of gravity of the rod is always located within the hole of the movable mold platen, even in a mold with a long ejection stroke for a molded product, the extrusion rod is prevented from tilting, and the rod is prevented from breaking or breaking. This prevents abnormal friction of the movable mold plate into which the rod is inserted.
第１図は従来の射出成形機の型締装置の縦断面
図、第２図は第１図の部分の拡大図、第３図は
従来の射出成形機の押出しロツドの縦断面図、第
４図乃至第７図は夫々本考案の射出成形機の突き
出し装置に適用される押出しロツドの各実施例を
示す縦断面図である。
k1，k2，k)，k4……押出しロツド、１……中空
部、２……空洞部、３……重錘、４……小径部、
５……空洞部、６……螺桿、７……重錘。
Fig. 1 is a longitudinal sectional view of a mold clamping device of a conventional injection molding machine, Fig. 2 is an enlarged view of the part shown in Fig. 1, Fig. 3 is a longitudinal sectional view of an extrusion rod of a conventional injection molding machine, and Fig. 4 is a longitudinal sectional view of a mold clamping device of a conventional injection molding machine. 7 to 7 are longitudinal sectional views showing respective embodiments of the extrusion rod applied to the extrusion device of the injection molding machine of the present invention. k 1 , k 2 , k ) , k 4 ... extrusion rod, 1 ... hollow part, 2 ... hollow part, 3 ... weight, 4 ... small diameter part,
5... hollow part, 6... spiral rod, 7... weight.
Claims (1)
金型から取出す突出しロツドを固定した突出しプ
レートの背面に当接して同プレートを移動させる
押出しロツドを備えてなる射出成形機の突き出し
装置において、前記押出しロツドの重心を、同ロ
ツドの長手方向中心より偏倚せしめるとともに、
前記可動型盤の孔内に常時位置するように構成し
てなることを特徴とする射出成形機の突き出し装
置。 An ejector for an injection molding machine comprising an ejector rod that is slidably inserted into a hole in a movable mold plate and that moves the ejector plate by coming into contact with the back side of an ejector plate that has a fixed ejector rod that takes out the molded product from the mold. In the apparatus, the center of gravity of the extrusion rod is offset from the longitudinal center of the extrusion rod, and
An ejection device for an injection molding machine, characterized in that it is configured to be always located in a hole of the movable mold platen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17364183U JPS6080909U (en) | 1983-11-11 | 1983-11-11 | Injection molding machine ejection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17364183U JPS6080909U (en) | 1983-11-11 | 1983-11-11 | Injection molding machine ejection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6080909U JPS6080909U (en) | 1985-06-05 |
| JPH028737Y2 true JPH028737Y2 (en) | 1990-03-02 |
Family
ID=30378219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17364183U Granted JPS6080909U (en) | 1983-11-11 | 1983-11-11 | Injection molding machine ejection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6080909U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329770B2 (en) * | 1974-12-02 | 1978-08-23 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49119458U (en) * | 1973-02-13 | 1974-10-12 | ||
| JPS5629130Y2 (en) * | 1977-08-03 | 1981-07-10 |
-
1983
- 1983-11-11 JP JP17364183U patent/JPS6080909U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329770B2 (en) * | 1974-12-02 | 1978-08-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6080909U (en) | 1985-06-05 |
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