TW495428B - A process for determining the switchover point from the filling program to the holding program in the injection molding process - Google Patents

A process for determining the switchover point from the filling program to the holding program in the injection molding process Download PDF

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Publication number
TW495428B
TW495428B TW90117640A TW90117640A TW495428B TW 495428 B TW495428 B TW 495428B TW 90117640 A TW90117640 A TW 90117640A TW 90117640 A TW90117640 A TW 90117640A TW 495428 B TW495428 B TW 495428B
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Taiwan
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injection
pressure
cavity
switching
switchover
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TW90117640A
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Chinese (zh)
Inventor
Ming-Shian Huang
Ke-Chang Chen
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Nat Kadhsiung First Unirersity
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Priority to TW90117640A priority Critical patent/TW495428B/en
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Publication of TW495428B publication Critical patent/TW495428B/en

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Abstract

The invention relates to a process for determining the switchover point from the filling program to the holding program in the injection molding process. The optimal switchover is determined by means of measuring the pressure inside the mould cavity and the injection screw position at regular intervals, and then processing with the invented interactive learning method. The method first employs a ""grey model"" to predict the next values of cavity pressure and position of injection screw and calculate their prediction errors individually. The ideal switchover point is selected when the peak values of cavity pressure's prediction error and the zero values of injection screw position's prediction error occur simultaneously. The invented method also allows to determining the switchover point with either ""cavity pressure mode"" or ""injection screw position mode"" only, so it can steady function even when one mode is out of order. Therefore, the invention can provide a reliable and high quality switchover control environment to the manufacturers. Besides, it can prevent the drawbacks of inaccuracy or causing malfunction when employing traditional methods.

Description

五、發明說明(/) 本發明係一種具替代模式之射出至保壓切換點控制方 法,應用於射出成型機在成型過程中由速度控制之射出階 段至壓力控制之保壓階段的切換時機之決定,而若其中一 組被設定為主要切換參考時,另一組則進入統計學習模 式,而右其中一組失效時,則此控制方法可自動鎖定至較 穩定的一組進行切換點控制。 ^射出成形法為一週期性製程技術,其步驟約略分為關 杈過程(Clamping)、射出過、保壓與塑化 過私(Holding and Plasticising)、冷卻與開模頂出過程 (Cooling and Ejection),射出成形機在射出過程是以射 出速度充填模式控制,而保壓過程為慶力充填模式控制。 射出成形工件的品質常取決於射出成形機在射出階段末期 幹為保壓p白&開始之切換點控制。正確的切換點控制,可 降低毛邊之發生之機率、保持齊一的產品品質、以及降 低二次料所產生的問題等之優點。 二—好的切換點控制除基本上取決於射出成形機可否提供 穩定的速度/壓力控制特性以維持在切換點的準確性有關 夕:,亦與所採用切換點控制方法息息相關。目前射出成形 機,切換控制方法主#以射膠螺桿位置或射膠時間為切換 之苓考,其結果將易受油溫變動、機械運動誤差、及塑料 不均勾性等干擾之影響,產生較大之誤差,遂造成切換時 機太早或延遲。太早切換常使產品尺寸不足或凹陷;而延 遲切換經常伴隨著模穴受高度擠麼的危險,除了對尺寸及 毛邊的不良衫響,亦可能造成模穴邊緣變形及鎖模單元超 495428 A7 B7 五、發明說明(上) 員 工 消 費 社 負載的f險主因’繼而對射«導㈣永久性傷害。 目前利用穩定可靠模穴屋力訊號進行切換的方法已被 像用’即模穴壓力在達預設的壓力時去作切換功能,此方 ==號是基於絕對量的模穴厂堅力值或基於計算出的 充=鮮點⑽+侧92)所產生,可排除螺桿行程 和止迓閥功能的影響,使得切換更有效率。作使 的歡麼力值決定切換點易受墨力量測值誤差之影H 目刖使用充填體積飽和點切換方法⑽邮卿,: 理論較具強健性’但仍受慶力感;器=的位置和特殊模μ力波形特性所影響,仍有改善的 又’市面上所習知的射出切換保a的方法 第一種為固定射膠時間切換方式;第二種定. 方式,也就是射膠螺桿位置設定方式。兩者目=積切換 J機:標準配備’但其結果皆易受油溫變動、:械運 差、及塑料不均勾性等干擾之影響,產生較大2運動块 =刀換時機太早或延遲;第三種切換 定力逐 換方式,對油屢驅動的射出成型機而言可 ^[力切 射嘴產力及模穴屋力三種模式的㈣方法此=昼力、 f切換方式仍常發生切換不良的現象,·第四種2固㈣ 壓力叶异充填體積飽和點的切換方法,其、、、用拉穴 模糊控制理論較具強健性,但仍受屡力咸'=法則雖使用 和特殊模穴壓力波形特性所影響。 ^ Ί态裝設的位置 上述四種射出切換保壓的方法,太早切換則如第四 I____ 5 本紙張Z度適用(CNS)A4V. Description of the Invention (/) The present invention is an injection-to-holding pressure switching point control method with an alternative mode, which is applied to the switching timing of the injection molding machine from the speed-controlled injection phase to the pressure-controlled holding pressure phase during the molding process. Decision, and if one group is set as the main switching reference, the other group enters statistical learning mode, and when the right group fails, this control method can automatically lock to a more stable group for switching point control. ^ The injection molding method is a periodic process technology, and its steps are roughly divided into the Clamping, Injection, Holding and Plasticising, Cooling and Ejection processes. ), The injection molding machine is controlled by the injection speed filling mode during the injection process, and the holding pressure process is controlled by the Qingli filling mode. The quality of the injection-molded workpiece often depends on the switching point control of the injection molding machine at the end of the injection stage to maintain the pressure and white & start. Correct switching point control can reduce the occurrence of burrs, maintain uniform product quality, and reduce the problems caused by secondary materials. Second-Good switching point control basically depends on whether the injection molding machine can provide stable speed / pressure control characteristics to maintain the accuracy at the switching point. It is also closely related to the switching point control method used. At present, the main control method of the injection molding machine is to switch between the position of the injection screw or the injection time. The result will be susceptible to disturbances such as oil temperature changes, mechanical motion errors, and uneven plasticity. The larger error causes the switching timing to be too early or delayed. Switching too early often causes the product to be undersized or sunken. Delayed switching is often accompanied by the danger of the mold cavity being squeezed. In addition to bad shirts and burrs, it may also cause deformation of the edge of the mold cavity and the clamping unit exceeds 495428 A7. B7 V. Description of the Invention (above) The main risk of the employee's consumer agency's f insurance was caused by 'continued shooting' to lead to permanent damage. At present, the method of using a stable and reliable mold cavity house signal to switch has been used like 'that is, the mold cavity pressure is used to switch when the preset pressure is reached, and this square == is based on the absolute value of the mold factory firm force value. Or based on the calculated charge = fresh point ⑽ + side 92), the effects of screw stroke and check valve function can be eliminated, making switching more efficient. The force value determines whether the switching point is susceptible to the error of the ink force measurement. H. To use the filling volume saturation point switching method. You Qing: The theory is more robust, but it is still affected by the sense of force; Affected by the position and special mode μ force waveform characteristics, there is still an improved method known in the market for injection switching. The first method is a fixed injection time switching method; the second method is fixed. Setting method of rubber screw position. Both eyes = product switching J machine: standard equipment, but the results are susceptible to interferences such as oil temperature changes, poor mechanical transport, and uneven plastic hooks, resulting in larger 2 motion blocks = too early tool change timing Or delay; the third switching mode of constant force switching, for oil-driven injection molding machine ^ [force cutting nozzle productivity and mold house force three modes of ㈣ method this = day force, f switching mode The phenomenon of poor switching still occurs frequently. · The fourth method of switching the volume saturation point of pressure filling with different pressures of the two solids, which is more robust with the fuzzy control theory of the pull point, but it is still affected by repeated stress. Although the use and special cavity pressure waveform characteristics are affected. ^ Position of the normal state installation The above four methods of injection and pressure retention are switched too early, such as the fourth I____ 5 This paper is suitable for Z degree (CNS) A4

裝· ! (請先閱讀背面之注意事項寫本頁)Outfit! (Please read the notes on the back to write this page)

A7 B7 五、發明說明( =示’常使產品尺寸不足或凹陷;而延遲切換則如第五 圖=,經常伴隨著模穴受高度_的危險,除了對2 ==良影響,亦可能造成模穴邊緣變形及鎖模單: 此!:用Γ因,繼而對射出機導柱的永久性傷害,因 此在貝用上無法穩定地獲得一致的品質要求。 u 有鐘於此,本發明者遂精心研究加以創新,盆間,妙 由不斷努力,乃發明出一種「呈 ^ 換點押制t^ /、曰代极式之射出至保壓切 而:::」,可以有效的改善以上各種方法的缺點, 頁 力溶融塑料、螺桿行程、止逆間功能、塾 里、1决差、杈具等溫度變化對切換點控制之影變, =射出速度的變化進行快速學f調整,故能_ 成形機製程能力、改善成形精度。 汁射出 ^達成上述目的之技術内容的控制方法,是提供一種 八曰代模式之射出至健切換點控制方法』,其係 出曰,型機之成型模具中設置模穴壓力感測器,並於射膠螺 “置射膠螺桿位置感測器,而在射出開始到切換保壓的 過私中’替代模式控制方法一直是啟動狀態,其中,模穴 壓力感測㈣訊號P1及射膠螺桿位置感測器的訊號S1被 擷取後,各取兩點分別以灰預測數學模型估算下一點打 及S2,亚與下一點實際量測值相減,獲得預測殘差量P3 及S3’由預測殘差量所形成的時序曲線可以制模穴壓力 預測殘差量峰值P4及螺桿位置制殘差量零值以,比對 兩者所產生的日寸序一同出現的狀態就切換到保壓控制,而 若其中-組被設定為主要切換參考時,另一組則進入統計 I _ 6 本紙張尺度適用中關家標準(CNS)A4 X 297公《 )_A7 B7 V. Description of the invention (= indicates that the product is often undersized or sunken; and the delay switching is shown in the fifth figure =, which is often accompanied by the danger of the mold cavity being affected by the height _, in addition to the 2 == good impact, it may also cause Deformation of mold cavity edge and mold clamping list: This !: Because of Γ, and then permanent damage to the injection machine guide column, it is not possible to consistently obtain consistent quality requirements for shell applications. U Have the clock here, the inventor Then carefully researched and innovated. Between the basins, Miaoyu continued to work hard, but invented a "presentation ^ exchange point bet t ^ /, said the generation of extreme injection to pressure and pressure cut :::", can effectively improve the above Disadvantages of various methods, such as temperature change of sheet force melting plastic, screw stroke, non-reverse function, caliper, 1 difference, branching, etc., affect the switching point control, = rapid change of injection speed to adjust f, so _ Molding process capability, improve molding accuracy. Juice injection ^ The control method to achieve the above-mentioned technical content is to provide an eight-generation mode injection-to-key switching point control method. Set the cavity in the mold The force sensor and the glue screw position sensor are placed in the glue screw position sensor, and the alternative mode control method is always in the starting state from the start of the injection to the switch to the pressure maintaining pressure. The mold cavity pressure sensor After the signal P1 and the signal S1 of the rubber screw position sensor are captured, two points are taken respectively to estimate the next point and S2 using the gray prediction mathematical model. The actual measured values of the next point and the next point are subtracted to obtain the predicted residual. The time series curve formed by the predicted residual amount of the quantities P3 and S3 'can be used to predict the peak value of the residual pressure amount P4 of the mold cavity pressure and the zero value of the residual amount of the screw position to compare the daily order produced by the two. The state is switched to the hold pressure control, and if the-group is set as the main switching reference, the other group enters the statistics I _ 6 This paper standard is applicable to Zhongguanjia Standard (CNS) A4 X 297 public ") _

、發明說明(+) 學胃桓—、. 朴 ^ 、工,且若其中一組失效時,則此控制方法可自動鎖 疋至較%定的一組進行切換點控制。 ^ 為使貴審查委員能進一步了解本發明設計之技術内 各及特點,茲附以圖式詳細說明如后: (一)圖式部份·· 第第第 圖 圖 圖 射出成型機之示意圖。 本發明之控制流程圖。 本發明之模穴壓力與模穴壓力預測殘差量之時序 比對圖。 保壓切換太早造成充填不足現象之壓力時序圖。 第五圖.保壓切換延遲造成過度充填甚而揚模現象之壓力 時序圖。 第四圖 請 先 閱 讀 背 面 之 注 意 事 Μ 填擊*J裝 本 · 頁 訂 經濟部智慧財產局員工消費合作社印製 (—' )圖號部份: (1 )成型模具 (2 )模穴 (3 )鎖模機構 (4)射膠單元 (5 )熔膠筒 (6 )料斗 (7) 射膠螺桿 (8) 控制器 (9 )模穴壓力感測器 (1 0)射膠螺桿位置感測器 (1 1 )夾模板 (Ρ1)模穴壓力擷取曲線 (Ρ2 )模穴壓力灰預測曲線 (Ρ3)模穴壓力殘差量曲線 (Ρ4)模穴壓力峰值曲線 (S1 )螺桿位置擷取曲線 (52) 螺桿位置灰預測曲線 (53) 螺桿位置殘差量曲線 (54) 螺桿位置零值曲線 (SW)比對切換狀態曲線 Μ ‘紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) A7 A7 B7 五、發明說明(t) (1 2 )替代模式控制方法 (1 3)機架 (14)導柱 (1 5 )射出動作器 (1 ):模:了2不)之射出成型機’包括有一副成型模具 ^作二 單^(4)提供塑膠材料的塑化及射出 夂:;、中含有炫膠筒(5)上方置有料斗(6),炫膠 I ί 7时射膠螺桿.(7 )可行婦及往復運動,射勝 壯、干 的運動文射出成型機的控制器(8)所控制, ,設於模穴内的模穴®力感測器(9 )連接至控制器 (8 )。 射出成型週期起始於塑膠料粒經由料斗(6 )餵入至 炝膠筒(5 )内,經由射膠螺桿(7 )的旋轉及向料斗 (6 )方向回退運動使之熔融並完成計量動作,此時融膠 置於射膠螺桿(7)的前緣’而緊接的射膠動作是由射膠 經濟部智慧財產局員工消費合作社印製 螺杯(7 )向模具(1 )方向前進運動將融膠充填模穴 (2 )内,稱為射出階段。 -而控制為(8 )對此時的充填動作為速度控制,融膠 未、、、工過模八壓力感測裔(9 )的位置前,模穴壓力感測器 (9 )的訊號值應為零,此後模穴壓力訊號值將逐步昇 ν ’而當融膠剛完成充滿整個模穴體積為射出階段結束, 此時,控制器(8 )應轉至壓力控制的保壓階段,而模穴 壓力感測器(9 )的訊號值將因融膠受壓縮所造成的密度 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 受化而快速增高,從模 折點,其中,合脒口★力曲線應可觀察出-明顯的轉 (7)益法在二二處的融膠溫度最先冷卻至射膠螺桿 …、 抆制态(8 )所設定之保壓條件-宗ητ蚀% 膠進入模穴内,視為保壓階段的結束= 階段’最後為開模、頂出階段。“後成型進入冷部 (8 )在射出階段,必須在融膠剛完成充、、高敕 個模穴體積與進一步受壓 成充滿正 到洗口固化後再切換J 仃切換到保塵狀態,直 寸精度等品ΐ= 對成形品的品質影響报Γ 不對或控制不良都會 而本發明方法能突破以往傳統 於成型模具⑴内裝置模穴壓力感測器(:Γ:射: 螺桿(7)裝置射膠螺桿位置感測器(10),射== 週期起始:塑勝料粒經由料斗(6)饒入至炫膠筒(5) 内,熔膠筒(5 )會被加埶到於制 ^ 声,Μ屮祚舍^ ^ J乙制為(8 )所設定的溫 f射出作動“ 15)會帶動射膠螺桿 後退,並將塑膠料粒一邊熔 吏疋轉又 Γ tr Λ . 邊向則地推擠到熔膠筒 (5 )的則鈿,-直到射膠螺 測值與控制器(8)設定值相等時二量(1 = 。⑴)完成關模動作後便進行射出動作,此時 為(1 5 )會帶動射膠螺桿(7丨 、 4的读产技w 達到控制器(8)所 3又疋的速度“推進’此時#代模式控制方 開始啟動’熔膠將被推入模具⑴的模穴 直幻充滿[個叙八為止’然後由替代模式控制方法(1 495428 A7 部 智 慧 員 工 消 費 印 五、發明說明(7 ) 2 )作切換控制,使進入保壓階段及冷卻階段,待模穴 (2 )内的熔膠固化後,夾模板(丄2 )進行開模頂 作,使成形品脫離模具(1 ),便完成一循環的射出成形 動作。 在射出開始到切換保壓的過程中,替代模式控制方去 (1 2 ) —直是啟動狀態,本發明之替代模式之控制流程 圖如第二圖所示:模穴壓力感測器的訊號ρι及射膠:才^ 位置感測器的訊號S1被擷取後,各取兩點分別以灰預測 數學模型估算下-點P2及S2,並與下一點實際量測值相 減,獲得預測殘差量P3'及S3,由預測殘差量所形成的時 序曲線可以找到模穴壓力預測殘差量峰值p4及螺桿位^ 預測殘差量零值S4,比對兩者所產生的時序一同出=的狀 態就切換到保壓控制。此時壓力學習模式進行峰值變異旦 統計,並修正零值S4的精度,當模穴壓力感測器^效= 異常,無法找到模穴壓力殘差量峰值P4日寺,就以射膠螺 桿位置訊號直接進行切換;而位置學習模式進行愛值變異 量統計,並修正♦值P4的精度,當螺桿位置感測器=效 或異常,無法找到射膠螺桿位置殘差量零值S4時,改 模穴壓力訊號直接進行切換。 如第三圖所示為將模穴壓力感測器的訊號ρι經灰預 測後可獲得訊號曲線p 2及螺桿位置感測器的訊號s i ' 預測後可獲得訊號曲線S2,與實際錄到的下—點相減獲 得預測殘差量曲線P3 A S3,由關趋量卿成的時序又 曲線可以找到模穴麼力預測殘差量峰值曲線P4及螺桿位 以 (請先閱讀背面之注意事項『填寫本頁) 裝 訂---- n n n - I 117 本紙張尺度適用中國國家鮮(CNS)A4規格⑵G χ 297公£ -n n - 495428 ‘發明說明(S") 置預測殘差量零值曲線S4,比對兩者同時為真 异的SW時序曲線就是切換到保麼控制的適當時機則所叶 • 因此,本發明方法之優點如下: 、。 1 ·具有非常好的穩健特性,不會因 效或異常造成切換控制錯誤,其只有加裝二娜=失 雖然可以完成掌握模具内部的成型 上别為, 制。…而出現異常訊號,無法拿來進行切換』 2·本發明之替代模式具有極優良的切 利用兩訊號的變異量進行比對並修正切換:由= 境變化、力口溫不均勻或;^料處s w条低環 良品現象。mm㈣料—致等因相造成的不 3 .本發明以灰·m歧行❹❻資料算, 點數少,時間差很小,電子電路 7 棹心 路零件的選用具有普遍性及 積間性,可以有效降低控制器成本。 上所迷’本發明的控制方法俱備完整性及新賴 生’而此排除傳統射出絲壓切換點 模穴壓力切換失效性的缺點 又不仏及早、、,屯 担舰U b丄 ^備%健學習功能,可以 楗供射出成形業者安全與高品質的製 .0ί ^ J表造裱境,其利用自然 法則技術思想之高度創作,符合於 法倶文提出申請。 付4明專利申請要件,爱依 請 先 閱 讀 背 之 注 意 窭 再_ 填爾 I裝 頁i 訂 經濟部智慧財產局員工消費合作社印制衣 本紙張尺度適用中國國家標準(CNS)A4規格(21〇 297公釐)、 Explanation of the invention (+) Learn stomach 桓 — 、. Park ^ 、 工, and if one group fails, this control method can automatically lock to a more fixed group for switching point control. ^ In order to allow your reviewers to further understand the technical aspects and features of the design of the present invention, detailed drawings are attached as follows: (1) Schematic Part ··· 第 第 图 图 图 The schematic diagram of the injection molding machine. Control flow chart of the present invention. A time-series comparison chart of the cavity pressure and the predicted residual pressure of the cavity pressure according to the present invention. Pressure timing chart of too short filling pressure causing insufficient filling. Fifth Figure. Timing chart of the pressure caused by the delay of holding pressure switching caused by overfilling or even the lifting mode phenomenon. For the fourth picture, please read the notice on the back. M Fill in the * J. The book is printed. (— ') Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. (1) Drawing mold (2) Mold cavity ( 3) Mold clamping mechanism (4) Injection unit (5) Glue barrel (6) Hopper (7) Injection screw (8) Controller (9) Cavity pressure sensor (1 0) Injection screw position Detector (1 1) Clip template (P1) Cavity pressure extraction curve (P2) Cavity pressure gray prediction curve (P3) Cavity pressure residual error curve (P4) Cavity pressure peak curve (S1) Screw position extraction Take curve (52) Screw position gray prediction curve (53) Screw position residual error curve (54) Screw position zero value curve (SW) Comparison switching state curve M 'Paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 mm) A7 A7 B7 V. Description of the invention (t) (1 2) Alternative mode control method (1 3) Frame (14) Guide post (1 5) Injection actuator (1): Mod: No 2 ) Injection molding machine 'includes a pair of molding dies ^ for two orders ^ (4) plasticizing and injection of plastic materials:;, contains a plastic hopper (5) above the hopper (6), dazzle I ί Injection rubber screw at 7 o'clock. (7) Viable and reciprocating motion, strong and dry kinematic injection molding machine controller (8), Mold cavity® force sensor located in the mold cavity (9) Connect to the controller (8). The injection molding cycle starts when the plastic pellets are fed into the rubber barrel (5) through the hopper (6), and are melted by the rotation of the injection screw (7) and the backward movement in the direction of the hopper (6) to melt and complete the measurement At this time, the melt glue is placed at the leading edge of the glue injection screw (7), and the next glue injection movement is to print the screw cup (7) toward the mold (1) by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The forward movement fills the cavity with the melted glue (2), which is called the injection phase. -While the control is (8) the filling action at this time is the speed control, the signal value of the cavity pressure sensor (9) before the position of the pressure sensor (9) of the melted mold, the mold, and the mold passes It should be zero. After that, the cavity pressure signal value will gradually rise ν '. When the melt cavity has just completed and the entire cavity volume is filled, the injection phase ends. At this time, the controller (8) should switch to the pressure control holding pressure phase, and The signal value of the cavity pressure sensor (9) will be the density caused by the compression of the melt glue. The paper size is adapted to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) and will increase rapidly. Point, of which, the force curve should be observable-a clear turn (7) The melting temperature of the beneficial method at the 22nd place is first cooled to the injection screw ..., the protection set by the control state (8) Compression condition-ητ% corrosion The glue enters the cavity, and it is regarded as the end of the holding pressure stage = the stage. The last stage is the mold opening and ejection stage. "The post-forming enters the cold section (8). In the injection stage, it is necessary to switch J 仃 to the dust-prevention state after the melt glue has just been filled, and the volume of the cavity is high and further compressed to be full. Dimensional accuracy and other products ΐ = impact on the quality of the molded product Γ will be wrong or poorly controlled, and the method of the present invention can break through the traditional traditional device cavity pressure sensor (: Γ: shot: screw (7) Equipped with a glue screw position sensor (10), shooting == cycle start: plastic wins are fed into the plastic barrel (5) through the hopper (6), and the plastic barrel (5) is added to In the sound of the system, the temperature of the injection of the temperature f set by (8) of the M 屮 祚 ^ J (15) will drive the injection screw back, and the plastic pellets will melt while turning Γ tr Λ. Push it sideways to the melt tube (5), then-until the measured value of the glue screw is equal to the set value of the controller (8), the second amount (1 = .⑴) will be injected after the mold closing operation is completed. Action, at this time (1 5) will drive the glue injection screw (7 丨, 4 read the production technology w to reach the speed of the controller (8) 3 and "promote" at this time # 代The mode controller starts to start the “melt will be pushed into the cavity of the mold ⑴ until it is filled with [up to eight]” and then the alternative mode control method (1 495428 A7 smart employee consumption stamp 5. Invention description (7) 2) The switching control is performed to enter the holding pressure phase and the cooling phase. After the melt in the mold cavity (2) is solidified, the clamping template (丄 2) is used to open the top of the mold to release the formed product from the mold (1). Cyclic injection molding action. During the process from injection start to switching to holding pressure, the alternative mode controller goes to (1 2)-it is always in the starting state. The control flowchart of the alternative mode of the present invention is shown in the second figure: mold cavity The signal of the pressure sensor and the glue: Only after the signal S1 of the position sensor is captured, two points are taken respectively to estimate the next-point P2 and S2 with the gray prediction mathematical model, and the actual measurement is performed with the next point. The values are subtracted to obtain the predicted residual amounts P3 'and S3. The time-series curve formed by the predicted residual amounts can be used to find the peak value p4 of the predicted residual amount of the cavity pressure and the screw position ^ the predicted residual amount zero S4. The sequence generated by the user is switched to the state of = Holding pressure control. At this time, the pressure learning mode performs peak variation statistics and corrects the accuracy of the zero value S4. When the cavity pressure sensor ^ effect = abnormal, the peak pressure residual amount P4 of the cavity pressure cannot be found. The position signal of the injection screw is directly switched; the position learning mode calculates the variation of the love value and corrects the accuracy of the value P4. When the screw position sensor = effective or abnormal, the zero value of the residual value of the injection screw position cannot be found. At S4, the mold cavity pressure signal is directly switched. As shown in the third figure, the signal curve p 2 of the cavity pressure sensor is gray-predicted to obtain the signal curve p 2 and the signal si 'of the screw position sensor. After that, the signal curve S2 can be obtained, and the actual recorded bottom-point is subtracted to obtain the predicted residual curve P3 A S3. The time series and curve formed by Guan Shiliang can find the mold cavity force prediction residual curve P4 And screw position (please read the precautions on the back 『Fill this page first) Binding ---- nnn-I 117 This paper size is applicable to China National Fresh (CNS) A4 size ⑵G χ 297 Kg £ -nn-495428 'Invention description (S ") Zero value prediction residual amount curve S4, both true comparison of different series graph SW is switched to the protection it is the appropriate time to control leaf • Thus, the advantages of the method of the present invention is as follows:,. 1 · It has very good robust characteristics, and will not cause switching control errors due to effects or abnormalities. It can only be installed with two Na = lost. Although it can complete the mastering of the internal molding of the mold, it can be controlled. … And there is an abnormal signal that cannot be used for switching. ”2. The alternative mode of the present invention has a very good use of the amount of variation of the two signals for comparison and correction of switching: from = environmental changes, uneven mouth temperature or; ^ The sw ring has a good low-ring phenomenon. The mm material is caused by the phase. 3. The invention is based on the gray · m divergence data. The number of points is small and the time difference is small. The selection of electronic circuit components is universal and inter-productive, which can be effective. Reduce controller costs. The above-mentioned "the control method of the present invention has complete integrity and new Lai Sheng" and this eliminates the disadvantage of the traditional injection wire pressure switching point cavity pressure switching failure, and it is not too early. The% Jian learning function can provide safe and high-quality systems for injection molding industry. The table is built with a high degree of creativity, which uses the technical principles of natural law to create, which is in line with the application of French scriptures. Please pay attention to the patent application requirements. Please read the note of Aiyi first. _ Fill in the page I. Order the printed clothes on the paper by the Intellectual Property Bureau of the Ministry of Economic Affairs and the Consumer Cooperative. 〇297 mm)

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A8 B8 C8A8 B8 C8
TW90117640A 2001-07-19 2001-07-19 A process for determining the switchover point from the filling program to the holding program in the injection molding process TW495428B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI615263B (en) * 2017-06-09 2018-02-21 Victor Taichung Machinery Works Co Ltd Injection molding machine control method
TWI667121B (en) * 2018-09-11 2019-08-01 國立高雄科技大學 A methodology to estimate suitable packing time and a process for multi-stage packing pressure settings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI615263B (en) * 2017-06-09 2018-02-21 Victor Taichung Machinery Works Co Ltd Injection molding machine control method
TWI667121B (en) * 2018-09-11 2019-08-01 國立高雄科技大學 A methodology to estimate suitable packing time and a process for multi-stage packing pressure settings

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