JPH03204155A - Forming machine - Google Patents
Forming machineInfo
- Publication number
- JPH03204155A JPH03204155A JP33834689A JP33834689A JPH03204155A JP H03204155 A JPH03204155 A JP H03204155A JP 33834689 A JP33834689 A JP 33834689A JP 33834689 A JP33834689 A JP 33834689A JP H03204155 A JPH03204155 A JP H03204155A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- tie bar
- ultrasonic sensor
- breakage
- 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
Links
- 238000000465 moulding Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002250 progressing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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
-
- 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
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/84—Safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は成形機に関し、特にタイバの破損をモニタする
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molding machine, and more particularly to a device for monitoring damage to tie bars.
第3図は従来の成形機を示す構成図である。第3図にお
いて、マシンベース1上の一方端に固定盤2、また他方
端にリンクハウジング3を取り付け、それらの間に4本
の連結用タイバ4a、4bを横架させ、この中間に可動
盤5が配置されている。リンクハウジング3と可動盤5
とはリンク機構10で連結し、リンク機構10をシリン
ダ6により差動せしめることにより可動盤5は固定盤2
に対して前進または後進し、金型(図示せず)を取り付
け、型締めができるようになっている。即ち、金型は固
定盤2と可動盤5との間に取り付けられ、可動盤5と固
定盤2との間に金型を押し付けて固定した後、固定盤2
側から材料が供給され、成形されるようになっている。FIG. 3 is a configuration diagram showing a conventional molding machine. In Fig. 3, a fixed platen 2 is attached to one end of the machine base 1, a link housing 3 is attached to the other end, four connecting tie bars 4a, 4b are horizontally suspended between them, and a movable platen is placed in the middle. 5 is placed. Link housing 3 and movable platen 5
The movable platen 5 is connected to the fixed platen 2 by a link mechanism 10, and the link mechanism 10 is differentially moved by the cylinder 6.
It is possible to move forward or backward relative to the machine, attach a mold (not shown), and clamp the mold. That is, the mold is installed between the fixed platen 2 and the movable platen 5, and after the mold is pressed and fixed between the movable platen 5 and the fixed platen 2, the mold is attached to the fixed platen 2.
Material is fed from the side and molded.
タイバ4a、4bには一般に前端と後端にそれぞれねし
部が刻設されており、固定盤2に固定した2分割ナツト
7に前端のねじ部を嵌合し、後端のねじ部はリンクハウ
ジング3例の回転装置付のナンドであるダイハイド調整
装置付ナツト8に保持されている。なお、9はタイバロ
ック装置である。Tie bars 4a and 4b generally have threaded portions at the front and rear ends, respectively, and the threaded portions at the front end are fitted into the two-part nut 7 fixed to the fixed platen 2, and the threaded portion at the rear end is connected to the link. The housing is held by a nut 8 with a die-hide adjusting device, which is a NAND with a rotating device. Note that 9 is a tie bar lock device.
上記のような成形機においては、金型が開かないように
大きな力で型締めを行なっている。タイバ4a、4bに
は毎回この力が作用する。型締め機構はトソグル式であ
り、過負荷になり易く、タイバの内部欠陥等により極め
て希にではあるがタイバが破損する場合があった。タイ
バの破損は通常、最も強度が低いねじ部で発生し、その
結果タイバナツトと破損したタイバの落下事故につなが
る。In the above-mentioned molding machines, the mold is clamped with a large force to prevent the mold from opening. This force acts on the tie bars 4a and 4b every time. The mold clamping mechanism is a toss-glue type, which is prone to overload, and in extremely rare cases, the tie bars may be damaged due to internal defects in the tie bars. Tie bar breakage usually occurs at the threaded section where the strength is weakest, resulting in an accident where the tie bar nut and the broken tie bar fall.
本発明はこのような点に鑑みてなされたものであり、そ
の目的とするところは、タイバの亀裂の進展を検出でき
る成形機を得ることにある。The present invention has been made in view of these points, and an object of the present invention is to obtain a molding machine that can detect the progress of cracks in tie bars.
このような目的を達成するために本発明は、タイバに取
り付けた超音波センサと、この超音波センサの検出信号
が基準信号より大きい場合に破損信号を出力する比較器
とを設けるようにしたものである。In order to achieve such an object, the present invention is provided with an ultrasonic sensor attached to a tie bar and a comparator that outputs a damage signal when the detection signal of this ultrasonic sensor is larger than a reference signal. It is.
本発明による成形機においては、タイバの亀裂発生が検
出される。In the molding machine according to the present invention, occurrence of cracks in the tie bars is detected.
第1図は、本発明による成形機の一実施例を示す構成図
であり、20は超音波センサである。第1図において第
3図と同一部分又は相当部分には同一符号が付しである
。FIG. 1 is a configuration diagram showing an embodiment of a molding machine according to the present invention, and 20 is an ultrasonic sensor. In FIG. 1, the same or equivalent parts as in FIG. 3 are given the same reference numerals.
また、第2図は第1図の成形機に設置された信号処理回
路を示す系統図である。第2図において、超音波センサ
20で検出した信号aは周波数フィルタ21で余分な周
波数を除去された信号すとなり、増幅器22に入力され
る。増幅器22は信号すを増幅して信号Cとして出力す
る。比較器23は入力された信号Cのレベルと基準信号
レベルとを比較し、信号Cのレベルが基準信号レベル以
上の場合にはrHJレベルの破損信号dを出力する。Further, FIG. 2 is a system diagram showing a signal processing circuit installed in the molding machine of FIG. 1. In FIG. 2, a signal a detected by an ultrasonic sensor 20 is filtered by a frequency filter 21 to remove excess frequencies, and is input to an amplifier 22. The amplifier 22 amplifies the signal C and outputs it as a signal C. The comparator 23 compares the level of the input signal C with the reference signal level, and outputs a damaged signal d at the rHJ level if the level of the signal C is higher than the reference signal level.
基準信号レベルは、タイバの微小亀裂が進展する際に発
生する弾性波の振幅より若干小さく設定しておく。この
ようにすることにより、型締め時に進展する微小亀裂の
監視ができ、タイバの破損を未然に予知して防止するこ
とができる。破損信号dは警報発生器24に入力され、
rHJレベルの間、警報を鳴らす。The reference signal level is set to be slightly smaller than the amplitude of elastic waves generated when microcracks in the tie bar develop. By doing this, it is possible to monitor microcracks that develop during mold clamping, and it is possible to predict and prevent damage to the tie bars. The damage signal d is input to the alarm generator 24,
Sounds an alarm during rHJ levels.
上記実施例では、−本のタイバしかモニタしてないが、
タイバの本数だけ超音波センサを使用してタイバ全てを
モニタすることもできる。In the above embodiment, only - tie bars are monitored, but
It is also possible to monitor all the tie bars by using as many ultrasonic sensors as there are tie bars.
また、上記実施例では、トラブル式の型締め装置を示し
たが、これは、直圧式やタイバの一端部に型締めシリン
ダを直接設けた方式の型締め装置を用いることもできる
。Further, in the above embodiment, a trouble-type mold clamping device is shown, but a direct pressure type or a mold clamping device of a type in which a mold clamping cylinder is directly provided at one end of a tie bar can also be used.
以上説明したように本発明は、超音波センサをタイバに
設け、この超音波センサの検出信号が基準信号より大き
い場合に破損信号を出力するようにしたことにより、型
締め時に進展する微小亀裂の監視ができ、タイバの破損
を未然に予知し、防止することができる効果がある。As explained above, the present invention provides an ultrasonic sensor on the tie bar and outputs a failure signal when the detection signal of the ultrasonic sensor is larger than a reference signal, thereby preventing microcracks that develop during mold clamping. This has the effect of being able to monitor, predict and prevent damage to tie bars.
第1図は本発明による成形機の一実施例を示す構成図、
第2図は第1図の成形機に配置された信号処理回路、第
3図は従来の成形機を示す構成図である。
1・・・マシンベース、2・・・固定盤、3・・・リン
クツSウジフグ、4a、4b・・・タイバ、5・・・可
動盤、6・・・シリンダ、7・・・2分割す・ノド、8
・・・ダイノ1イト調整装置付ナンド、9・・・タイバ
口・ツク装置、10・・・リンク機構、20・・・超音
波センサ。
第2図
第3図FIG. 1 is a configuration diagram showing an embodiment of a molding machine according to the present invention;
FIG. 2 is a signal processing circuit arranged in the molding machine shown in FIG. 1, and FIG. 3 is a configuration diagram showing a conventional molding machine. 1...Machine base, 2...Fixed plate, 3...Links S Ujifugu, 4a, 4b...Tie bar, 5...Movable plate, 6...Cylinder, 7...2 split plate・Throat, 8
... Dyno 1 Nand with adjustment device, 9... Tie bar opening/tuck device, 10... Link mechanism, 20... Ultrasonic sensor. Figure 2 Figure 3
Claims (1)
出信号が基準信号より大きい場合に破損信号を出力する
比較器とを備えた成形機。A molding machine equipped with an ultrasonic sensor provided on a tie bar and a comparator that outputs a damage signal when the detection signal of the ultrasonic sensor is larger than a reference signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33834689A JPH03204155A (en) | 1989-12-28 | 1989-12-28 | Forming machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33834689A JPH03204155A (en) | 1989-12-28 | 1989-12-28 | Forming machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03204155A true JPH03204155A (en) | 1991-09-05 |
Family
ID=18317287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33834689A Pending JPH03204155A (en) | 1989-12-28 | 1989-12-28 | Forming machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03204155A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05162000A (en) * | 1991-12-12 | 1993-06-29 | Daikin Mfg Co Ltd | Foreseeing maintenance system for pressing machine |
CN106334726A (en) * | 2015-07-07 | 2017-01-18 | 日本电产新宝株式会社 | Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4718423U (en) * | 1971-04-01 | 1972-11-01 | ||
JPS6037257A (en) * | 1983-08-08 | 1985-02-26 | Toyota Motor Corp | Method for controlling tie bar load of die casting machine |
-
1989
- 1989-12-28 JP JP33834689A patent/JPH03204155A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4718423U (en) * | 1971-04-01 | 1972-11-01 | ||
JPS6037257A (en) * | 1983-08-08 | 1985-02-26 | Toyota Motor Corp | Method for controlling tie bar load of die casting machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05162000A (en) * | 1991-12-12 | 1993-06-29 | Daikin Mfg Co Ltd | Foreseeing maintenance system for pressing machine |
CN106334726A (en) * | 2015-07-07 | 2017-01-18 | 日本电产新宝株式会社 | Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method |
US10478887B2 (en) | 2015-07-07 | 2019-11-19 | Nidec-Shimpo Corporation | Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method |
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