JPS59223153A - Mold clamping device for compression molding machine - Google Patents

Mold clamping device for compression molding machine

Info

Publication number
JPS59223153A
JPS59223153A JP9892783A JP9892783A JPS59223153A JP S59223153 A JPS59223153 A JP S59223153A JP 9892783 A JP9892783 A JP 9892783A JP 9892783 A JP9892783 A JP 9892783A JP S59223153 A JPS59223153 A JP S59223153A
Authority
JP
Japan
Prior art keywords
pressure
mold clamping
hydraulic cylinder
molding machine
compression molding
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.)
Pending
Application number
JP9892783A
Other languages
Japanese (ja)
Inventor
Toshiaki Shinohara
利彰 篠原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9892783A priority Critical patent/JPS59223153A/en
Publication of JPS59223153A publication Critical patent/JPS59223153A/en
Pending legal-status Critical Current

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/26—Mechanisms or devices for locking or opening dies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To control easily and adequately a mold clamping pressure by providing a pressure increasing device which controls the mold clamping pressure by a hydraulic cylinder into a hydraulic circuit of the hydraulic cylinder for driving a mold for molding. CONSTITUTION:A pressure increasing circuit 21 having a pressure increasing device 20 is provided in a hydraulic circuit for a hydraulic cylinder 3 of a double acting type. The piston areas on the driving side and pressure increasing side of the device 20 are set at the values inversely proportional to a pressure increasing ratio and the direction of movement is controlled when the working direction of the pressure oil on the driving side is changed over by a solenoid valve 22. A pilot operated check valve 24 for holding the oil pressure increased by the device 20 to prevent backflow to a pump 4 is provided. The device 20 is selectively operated to control the mold clamping pressure by the cylinder 3.

Description

【発明の詳細な説明】 本発明はたとえば射出成形、移送成形等によりＩＣモー
ルドプレス成形などを行なうために用いられる圧縮成形
機に関し、特にその成形用金型の型締め圧を簡単かつ適
切に制御することが可能となる型締め装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compression molding machine used for performing IC mold press molding by injection molding, transfer molding, etc., and particularly to a compression molding machine that easily and appropriately controls the clamping pressure of the molding die. The present invention relates to a mold clamping device that makes it possible to

従来この種の圧縮成形機の型締め装置としては、たとえ
ば第１図に示すように単動型油圧シリンダ（１）を用い
て成形用金型（２ｍ、２ｂ）に型締め圧を作用させるも
のや、第２図に示すように複動型油圧シリンダ（３）を
用いたもの等が知られている。Conventionally, a mold clamping device for this type of compression molding machine uses a single-acting hydraulic cylinder (1) to apply clamping pressure to the molding die (2m, 2b), as shown in Fig. 1, for example. Also known are those using a double-acting hydraulic cylinder (3) as shown in FIG.

これを簡単に説明すると、第１図において、符号（４）
はモータ（４ａ）により駆動される油圧ポンプ、（５）
はタンク、（６）は前記シリンダ（１）の作動、非作動
および作動方向を切換える切換制御弁で、またこの切換
制御弁（６）とシリンダ（１）の一方室（型の閉方向側
室）との間はパイロット型の逆止弁（７）を有する油圧
通路（８）にて接続されるとともに、この通路（８）は
逆止弁（７）の上流側で可変オリアイス（９）および逆
止弁（９ｍ）を有する分岐通路（８ａ）を有し、ポンプ
（４）からの圧油は切換弁（１０）を介して通路（８）
またはその分岐通路（８ａ）に選択的に供給されるよう
に構成されている。一方、シリンダ（１）の他方室（型
の開方向側）と切換制御弁（６）とを接続する油圧通路
ａυもまた、切換弁０２を介して逆止弁０３を有する分
岐通路（ｌ１ｍ）との間で圧油の流れが切換えられるよ
うに構成されている。To explain this simply, in Fig. 1, the symbol (4)
is a hydraulic pump driven by a motor (4a), (5)
is a tank, (6) is a switching control valve that switches the cylinder (1) between operation, non-operation, and the operating direction, and this switching control valve (6) and one chamber of the cylinder (1) (the side chamber in the closing direction of the mold) A hydraulic passage (8) having a pilot type check valve (7) is connected to the hydraulic passage (8), and this passage (8) has a variable orifice (9) and a reverse It has a branch passageway (8a) with a stop valve (9m), and the pressure oil from the pump (4) flows through the passageway (8) through the switching valve (10).
Alternatively, it is configured to be selectively supplied to the branch passageway (8a). On the other hand, the hydraulic passage aυ connecting the other chamber of the cylinder (1) (on the side in the mold opening direction) and the switching control valve (6) is also connected to a branch passage (l1m) having a check valve 03 via the switching valve 02. It is configured so that the flow of pressure oil can be switched between.

そして、このような構成において、ポンプ（４）から供
給される圧油によシ油圧シリンダ（１）が作動して金型
（２ａ、　２ｂ）での型締めを行ない、成形品の成形を
行なうわけであるが、このような装置では、ポンプ吐出
流量が多く必要とされ、モータ（４ａ）での消費電力が
大きいばかシでなく、タンク（５）の容量としても大き
なものが要求され、装置全体が大型化し、しかも運転コ
スト面で好ましくないといった欠点があった。In such a configuration, the hydraulic cylinder (1) is operated by pressure oil supplied from the pump (4) to clamp the molds (2a, 2b) and mold the molded product. However, in such a device, a large pump discharge flow rate is required, the motor (4a) does not consume a large amount of power, and the tank (5) is also required to have a large capacity. The disadvantage was that the overall size was large and the operating cost was unfavorable.

これに対し、第２図に示される複動型シリンダ（３）を
用いたものでは、スライドテーブル等を高速動作させる
ときには細径シリンダ（３＆）のみを用い、このときに
は太径シリンダ（３ｂ）にはポンプ（４）からの圧力を
直接かけず、油タンク（５）からの自吸作用のみとし、
また低速動作および型締め時には両シリンダ（３ｍ、３
ｂ）にポンプ（４）からの圧力をかけて作動力を得る構
成が採用されている。なお、第２図中符号（１４，１５
）はリリーフ弁、Ｏｅは可変オリフィス、さらに（７ｍ
、７ｂ、７ｅ）はパイロット型の逆止弁で、またその細
筒１図に示したものと同一部分あるいは相当する部分に
は同一番号を付しておシ、その動作等についての説明は
省略する。On the other hand, in the case of the double-acting cylinder (3) shown in Fig. 2, only the small-diameter cylinder (3&) is used when a slide table or the like is operated at high speed, and at this time, the large-diameter cylinder (3b) is used. does not apply pressure directly from the pump (4), only self-priming from the oil tank (5),
Also, during low-speed operation and mold clamping, both cylinders (3 m, 3
A configuration is adopted in which the operating force is obtained by applying pressure from the pump (4) to b). In addition, the symbols (14, 15
) is a relief valve, Oe is a variable orifice, and (7m
, 7b, 7e) are pilot type check valves, and the same numbers are given to the same or corresponding parts as those shown in Figure 1 of the thin tube, and explanations of their operation etc. are omitted. do.

そして、このような複動型シリンダ（３）を用いた装置
では、第１図に示す単動式のものに比べ、同じ型締め圧
を得るうえで、そのポンプ吐出流量およびポンプ駆動用
モータの消費電力が数分の１で済み、また通常吐出流量
の約３〜４倍程度を必要とするタンク容量としても、流
量の少なくてよい複動型では数分の１で済み、その結実
装置全体の小型化が図れるとともに、その消費電力が少
ないため、運転コストを低減できるという利点がある。In a device using such a double-acting type cylinder (3), compared to the single-acting type shown in Fig. 1, in order to obtain the same mold clamping pressure, the pump discharge flow rate and the pump drive motor need to be adjusted. The power consumption is a fraction of that, and the tank capacity, which normally requires about 3 to 4 times the discharge flow rate, is only a fraction of that of the double-acting type, which requires a small flow rate, and the entire fruiting device is This has the advantage that it can be made smaller and consume less power, reducing operating costs.

しかし、このような従来の複動型の装置において望まれ
ることは、よシ簡単な構成により上述した小型化と低コ
スト化を維持したまま、成形性に影響する型締め圧、特
にこの型締め動作完了時迄またはその直前での圧力を適
切に制御し得るように構成することで、これらの点を満
足し得る装置の出現が要望されている。However, what is desired in such a conventional double-acting type device is that it maintains the above-mentioned size and cost reduction through a simple configuration, while also reducing the mold clamping pressure that affects moldability, especially this mold clamping. There is a demand for an apparatus that can satisfy these points by being configured to appropriately control the pressure until or just before the completion of the operation.

本発明はこのような事情に鑑みてなされたものであシ、
成形用の油圧シリンダの油圧回路中に、との油圧シリン
ダによる型締め圧を制御する増圧器を付設するという簡
単な構成によって、成形用金型の型締め圧を簡単かつ適
切に制御し得るとともに、ポンプ駆動のための消費電力
を少なくし、その運転コストを低減し、また装置全体の
小型化をも満足し得る圧縮成形機の型締め装置を提供す
るものである。The present invention has been made in view of these circumstances.
With a simple configuration in which a pressure intensifier for controlling the clamping pressure of the hydraulic cylinder is attached to the hydraulic circuit of the hydraulic cylinder for molding, the clamping pressure of the molding die can be easily and appropriately controlled. The present invention provides a mold clamping device for a compression molding machine that can reduce power consumption for driving a pump, reduce operating costs, and downsize the entire device.

以下、本発明を図面に示した実施例を用いて詳細に説明
する。Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

第３図は本発明に係る圧縮成形機の型締め装置の一実施
例を示すものであシ、同図において第１図または第２図
と同一部分あるいは相当する部分には同一番号を付して
その詳細な説明は省略する。FIG. 3 shows an embodiment of the mold clamping device for a compression molding machine according to the present invention, and in this figure, the same or corresponding parts as in FIG. 1 or 2 are given the same numbers. Therefore, detailed explanation thereof will be omitted.

さて、本発明によれば、複動型の油圧シリンダ（３）へ
の油圧回路中に、図中一点鎖線で示され、増圧器（イ）
を有する増圧回路Ｑυを設け、との増圧器（ホ）を選択
的に作動させることによシ油圧シリンダ（３）による型
締め圧を簡単かつ適切に制御し、しかもとの増圧器（イ
）によシボンプ駆動用の消費電力を少なくシ、その運転
コストを低減し得るようにしたところに特徴を有してい
る。Now, according to the present invention, in the hydraulic circuit to the double-acting hydraulic cylinder (3), there is a pressure intensifier (A) shown by a dashed line in the figure.
By providing a pressure intensifier circuit Qυ having a pressure intensifier (E) and selectively operating the pressure intensifier (E), the mold clamping pressure by the cylinder hydraulic cylinder (3) can be easily and appropriately controlled, and the pressure intensifier (I) can be easily and appropriately controlled. ) It is characterized by the fact that the power consumption for driving the pump is reduced and the operating cost can be reduced.

これを詳述すると、前記増圧器−は、その駆動側と増圧
側のピストン面積が増圧比に逆比例した値にて設定され
ておシ、との増圧器−はその駆動側での圧油の作用方向
が電磁弁（２２）にて切換えられることによシ動きの方
向が制御される。なお、図中（ハ）は仁の増圧器（イ）
にて増圧された油圧保持用のパイロット型チェックパル
プ、Ｑ４）はポンプ（４）への逆流を防ぐパイロット型
のチェックパルプで、前記増圧器（イ）での増圧側の油
量は増圧加圧したときに生じる各パルプ（２３、２４）
でのリーク量以上に設定されている。また、（ハ）は圧
力検出用スイッチ、（ハ）はパイロット圧制御パルプで
ある。To explain this in detail, in the pressure intensifier, the piston areas on the drive side and the pressure increase side are set to values inversely proportional to the pressure increase ratio, and the pressure intensifier is The direction of movement is controlled by switching the direction of action of the solenoid valve (22). In addition, in the figure (c) is Jin's pressure intensifier (a)
Q4) is a pilot type check pulp for maintaining the oil pressure increased by pressure in the pump (4), and is a pilot type check pulp to prevent backflow to the pump (4). Each pulp produced when pressurized (23, 24)
The leak amount is set to be higher than the leak amount. Further, (c) is a pressure detection switch, and (c) is a pilot pressure control pulp.

今、油圧シリンダ（３）が型の閉方向に上昇し、その上
限で型締めの状態となると、これを圧力検出用スイッチ
（ハ）にて検出し、これと同時に増圧回路Ｃ！υの電磁
弁（２２）がオン状態に切換えられ、これによって増圧
器−にて増圧された油は、チェックパルプ（ハ）を開放
して前記油圧シリンダ（３）を加圧保持することになる
。たとえばポンプ（４）の圧力を１２０Ｋｙ／６／ｌと
し、これを増圧比が２倍となるように設定された増圧器
（イ）を利用すれば、２４０Ｋｐ／６／ｌの圧力となり
、これにより油圧シリンダ（３）では２倍の型締め圧が
得られることになる。Now, when the hydraulic cylinder (3) rises in the mold closing direction and reaches the upper limit to close the mold, this is detected by the pressure detection switch (c), and at the same time, the pressure increase circuit C! The solenoid valve (22) of υ is switched on, and the oil increased in pressure by the pressure intensifier opens the check pulp (c) and maintains the pressure in the hydraulic cylinder (3). Become. For example, if the pressure of the pump (4) is 120 Ky/6/l and you use the pressure intensifier (a) set to double the pressure increase ratio, the pressure will be 240 Kp/6/l, which results in In the hydraulic cylinder (3), twice the mold clamping pressure can be obtained.

そして、その成形が完了し、型開き動作がスタートする
と同時に、増圧器（イ）の電磁弁（２２）をオフ状態と
すれば、チェックバルブ（２鴎がパイロット圧にて開放
された状態で増圧器翰の駆動側のピストンが下降し、増
圧側のシリンダに油を吸引して溜める結果となる。Then, when the molding is completed and the mold opening operation starts, if the solenoid valve (22) of the pressure intensifier (a) is turned off, the check valve (2) is opened by pilot pressure. The piston on the drive side of the pressure regulator descends, causing oil to be sucked into and stored in the cylinder on the pressure increase side.

なお、本発明は上述した実施例構造に限定されず、各部
の形状、構造等を適宜変形、変更し得るものであること
は明らかであろう。It should be noted that the present invention is not limited to the structure of the embodiments described above, and it is obvious that the shape, structure, etc. of each part can be modified and changed as appropriate.

また、本発明を特徴づける増圧器（イ）による増圧時点
としては、油圧シリンダ（３）による型締め動作完了時
点か、あるいはその直前であれば、所望の効果が得られ
るもので、これに合わせて圧力検出用スイッチ２５）な
どの検出手段によシミ磁弁（２２）をオン・オフ制御す
ればよいものである。Furthermore, the desired effect can be obtained when the pressure is increased by the pressure intensifier (a), which characterizes the present invention, at the time when the mold clamping operation by the hydraulic cylinder (3) is completed, or just before that. In addition, the stain magnetic valve (22) may be controlled on/off using a detection means such as a pressure detection switch 25).

以上説明したように、本発明に係る圧縮成形機の型締め
装置によれば、油圧シリンダへの油圧回路中に、増圧器
を付設するようにしたので、簡単な構成にもかかわらず
、必要とされる型締め圧を簡単かつ適切に倍増させてそ
の成形性を向上させることができるものであシ、また従
来に比べて同じ型締め圧を得るうえで本ポンプの圧力が
数分の１で済み、その駆動のための消費電力を少なくし
、その運転コストを低減でき、さらに装置全体としての
小型化も達成し得るといった種々優れた効果がある。As explained above, according to the mold clamping device for a compression molding machine according to the present invention, a pressure intensifier is attached in the hydraulic circuit to the hydraulic cylinder, so despite the simple configuration, it is not necessary. The mold clamping pressure can be easily and appropriately doubled to improve moldability, and the pressure of this pump is a fraction of that of conventional methods to obtain the same mold clamping pressure. It has various excellent effects, such as reducing power consumption for driving the device, reducing operating costs, and miniaturizing the device as a whole.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図および第２図はそれぞれ単動型シリンダ、複動型
シリンダを用いた従来装置を例示する概略系統図、第３
図は本発明に係る圧縮成形機の型締め装置の一実施例を
示す概略系統図である。 （３）・・・・複動型油圧シリンダ、（４）・・・・油
圧ポンプ、（５）・・・・タンク、（６）・・・・切換
制御弁、（８１、（１１１・・・・油圧通路、（２１・
・・・増圧器、■１）・・・・増圧回路、（２２）―・
・・電磁弁、（２３）　、　Ｃ’４）・・拳・チェック
バルブ。 代理人大岩増雄 第１図 ｂ １、事件の表示　　　特願昭５８−９８９２７号３．補
正をする者 名　称　　（６０１）三菱電機株式会社代表者片山仁八
部 ４、代理人 （１１明細書の発明の名称を、「成形機の型締め装置」
と補正する。 （２）同書第１頁の特許請求の範囲を別紙の通り補正す
る。 （３）同書同頁第１８行目「圧縮成形機」を１成形機」
と補正する。 （４）同省第２頁第１行目［圧縮成形機−１を「成形機
」と補正する。 （５）同省第５頁第７行目、および第１１行目「圧縮成
形機」を「成形機」と補正する。 （６）同省第８頁第１行目、および第１５行目「圧縮成
形機」を「成形機」と補正する。 以上 別　　　　　　　　　　紙 「（１）成形機における成形用金型を駆動する油圧シリ
ンダの油圧回路中に、この油圧シリンダによる型締め圧
を制御する増圧器を付設したことを特徴とする成形機の
型締め装置。 （２１増圧器は、油圧シリンダによる型締め動作完了直
前で、作動されることを特徴とする特許請求の範囲第１
項記載の成形機の型締め装置。 （３）増圧器は、油圧シリンダによる型締め動作完了時
点で、作動されることを特徴とする特許請求の範囲第１
項記載の成形機の型締め装置。」以上Figures 1 and 2 are schematic system diagrams illustrating conventional devices using single-acting cylinders and double-acting cylinders, respectively;
The figure is a schematic system diagram showing an embodiment of a mold clamping device for a compression molding machine according to the present invention. (3)...Double-acting hydraulic cylinder, (4)...Hydraulic pump, (5)...Tank, (6)...Switching control valve, (81, (111...)・Hydraulic passage, (21・
... Pressure intensifier, ■1) ... Pressure intensifier circuit, (22) ---
...Solenoid valve, (23), C'4)...Fist check valve. Agent Masuo Oiwa Figure 1 b 1. Indication of the case Patent Application No. 1983-98927 3. Name of person making the amendment Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent (11 The name of the invention in the specification was changed to "mold clamping device for a molding machine")
and correct it. (2) The claims on page 1 of the same document are amended as shown in the attached sheet. (3) Line 18 of the same page of the same book: ``Compression molding machine'' is 1 molding machine.''
and correct it. (4) Ministry of Finance, page 2, line 1 [Correction of compression molding machine-1 to ``molding machine.'' (5) "Compression molding machine" on page 5, line 7 and line 11 of the same Ministry is corrected to "molding machine." (6) "Compression molding machine" on page 8, line 1 and line 15 of the Ministry of Education shall be amended to read "molding machine." Attachment ``(1) A mold clamping machine characterized in that a pressure intensifier for controlling the clamping pressure by the hydraulic cylinder is attached to the hydraulic circuit of a hydraulic cylinder that drives a molding die in the molding machine. (21) The pressure intensifier is activated immediately before the mold clamping operation by the hydraulic cylinder is completed.
Mold clamping device for the molding machine described in Section 2. (3) The pressure intensifier is activated at the time when the mold clamping operation by the hydraulic cylinder is completed.
Mold clamping device for the molding machine described in Section 2. "that's all

Claims (3)

【特許請求の範囲】[Claims] （１）圧縮成形機における成形用金型を駆動する油圧シ
リンダの油圧回路中に、この油圧シリンダによる型締め
圧を制御する増圧器を付設したことを特徴とする圧縮成
形機の型締め装置。(1) A mold clamping device for a compression molding machine, characterized in that a pressure intensifier for controlling mold clamping pressure by the hydraulic cylinder is attached to a hydraulic circuit of a hydraulic cylinder that drives a molding die in the compression molding machine. （２）増圧器は、油圧シリンダによる型締め動作完了直
前で、作動されるととを特徴とする特許請求の範囲第１
項記載の圧縮成形機の型締め装置。(2) The pressure intensifier is activated immediately before the mold clamping operation by the hydraulic cylinder is completed.
A mold clamping device for a compression molding machine as described in . （３）増圧器は、油圧シリンダによる型締め動作完了時
点で、作動されることを特徴とする特許請求の範囲第１
項記載の圧縮成形機の型締め装置。(3) The pressure intensifier is activated at the time when the mold clamping operation by the hydraulic cylinder is completed.
A mold clamping device for a compression molding machine as described in .
JP9892783A 1983-06-01 1983-06-01 Mold clamping device for compression molding machine Pending JPS59223153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9892783A JPS59223153A (en) 1983-06-01 1983-06-01 Mold clamping device for compression molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9892783A JPS59223153A (en) 1983-06-01 1983-06-01 Mold clamping device for compression molding machine

Publications (1)

Publication Number Publication Date
JPS59223153A true JPS59223153A (en) 1984-12-14

Family

ID=14232758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9892783A Pending JPS59223153A (en) 1983-06-01 1983-06-01 Mold clamping device for compression molding machine

Country Status (1)

Country Link
JP (1) JPS59223153A (en)

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