201141681 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種射出機，特料指—種以模内屋 力進行塑品質量之線上監控方法。 【先前技術】 .現有射出機的射出方法中，是將溶膠射入模具中，並 藉由操作射出機的操作條件以控制成形過程，但由於溶膠 在模具中的行為非常複雜，报難由射出機的操作條件直接 ㈣，因此近年來模流分析軟體的開發，即在解決此項問 題’目前已可簡易模擬出熔膠在模具内的流動性質及成形 過程，進而用以調整射出機的操作條件。 然而n溶膠的&變性質難以掌握，因此使得模擬 的結果與實際行為仍有所差異，因此成品必須要開模取出 後才能判斷品質，相當耗費人力成本，且也容易產生誤判 的狀況，此外，射出機的操作條件往往是依靠使用者的操 作經驗進行調整，並無標準的作業程序，而會有容易產生 失敗成品的問題。 【發明内容】 囱此本發明之目的，即在提供一種標準作業程序並 可自動師選成品的以模内壓力進行塑品質量之線上監控方 法。 、於疋，本發明以模内壓力進行塑品質量之線上監控方 :應用於-射出機及-供該射出機射出塑料以成型成品的 杈具°亥方法先於該模具内的複數壓力參考點分別安裝相 201141681 對應的複數壓力感測器，並建構一供該射出機操作的保壓 時間曲線，該保壓時間曲線包括一具有一保壓壓力的壓縮 區段，及一連接於該壓縮區段之後的持壓區段，接著應用 該保壓時間曲線於該射出機，並於訊號連接該等壓力感測 器的i控系統中建立一管制規則，最後該監控系統依照 該管制規則檢測成品，並於成品不符合該管制規則時產生 警示。 本發明之功效在於利用標準作業程序及該監控系統的 即時監控，可自動篩選出不符合所需的成品，進而提昇產 品的品質。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖1與圖2，本發明以模内壓力進行塑品質量之線 上監控方法之該較佳實施例應用於一射出機（圖未示）及 一供該射出機射出塑料以成型成品的模具（圖未示），該方 法包含下列步驟20〜30。 於步驟20中，根據該射出機的機台參數、塑料參數及 該模具的外型尺寸進行模流分析，並根據分析結果得出適 合用以量測該模具内壓力變化的複數壓力參考點，以及一 模擬得出的適於該模具使用的保壓時間曲線4，該保壓時間 曲線4包括一具有一保壓壓力411的壓縮區段41，及一連 接於該壓縮區段41之後的持壓區段42。 201141681 於本實施例中，該機台參數包括射出速度、射出壓力 、螺桿直徑、最大保壓段數、最大保壓壓力及鎖模力等參 數，該塑料參數包括塑料比重、建議加工溫度範圍等參數 ，該模具的外型尺寸包括澆道尺寸、流道尺寸及成品自身 尺寸等參數，模流分析的方法是採用M〇ldfl〇w模流分析軟 體進行模擬，而該等壓力參考點的選取要求為相對澆口位 置的遠澆口及近澆口，且每一位置的選取是要求在加壓過 耘中，壓力變化較為穩定平順且壓力曲線適合用以曲線擬 合的位置。 於步驟21中，分別安裝相對應的複數壓力感測器於該 模具内的該等壓力參考點位置。 於步驟22中，使用者操作該射出機射出成品，並以模 擬的該保壓時間曲線4所轉換的一輸入壓力對該模具進行 保壓，並透過該等壓力感測器所量測到的複數壓力訊號來 檢測成品的成形過程是否相同於模擬結果。若不相同則 重新調整模擬參數再次進行模擬，並將模擬後的保壓時間 曲線4轉換成新的輸入壓力後再次射出成品；若相同，則 進行下一步驟。 於步驟23中，檢測成品的質量是否實質上相同於一規 定質量，若不相同，則重新進行模擬及射出成品，.直到相 等於該規定質量後，記錄此時輸入壓力中的保壓壓力為理 想的保壓壓力。 於步驟24中，利用該等壓力感測器操取於步驟23中 所應用的理想的保壓壓力後所產生的該等壓力訊號後，以 201141681 熱流公式計算出複數溫度時間曲線β 配合參閱圖3，於步驟25中，利用步驟24中所得出於 不同壓力參考點的該等溫度時間曲線及先前步驟所產生的 模擬保壓時間曲線4模擬轉換出複數壓力比容溫度曲線5， 並比對該·#壓力比容溫度曲線5中塑料在接近固化的一頂 出溫度時，遠澆口與近澆口之比容值之相差值是否為可以 谷許之差值。若相差值可以容許，則進行下一步驟；若相 差值不可容許，代表不同壓力參考點的最終比容變化不相 同，則改變該保壓時間曲線4中的持壓區段42的壓力後重 新模擬，直到該等壓力比容溫度曲線5於接近頂出溫度的 溫度區間内實質上相等’且在實際驗證後亦為相類似的結 果時（見®I 4)進行下—步驟，此時持壓區段42的壓力即 為理想的持壓區段的壓力。於本實施例中，圖3及圖4分 別表不模擬及實際作業中遠洗口及近逢口的比容變化。 於步驟26 +，利用步驟23所得出理想的保壓壓力及 :驟25所得出理想的持壓區段的壓力建構出一供該射出機 才呆作的實際的保壓時間曲線6 (見圖5 )。 :閱圖卜6,於步驟27中’統計該射出機多次射出成 -時由該等壓力感測器所量測的壓力訊 :::數學方式建立相對應該等壓力感測器的複數壓Π =力中僅表_應其中-壓力感 於步驟28中 螅7 π盘 .刊用該等壓力標準 、及實際射出成品的壓力數據進行統計，並藉以建立 201141681 一管制規則8,該管制規則8包括成品的一質量管制上限 81 β及質里管制下限82、複數相對應該等壓力感測器的最 ^壓力值（圖未示）、複數相對應該等壓力感測器的特徵點 壓力值（圖未示）。於本實施例中，所指特徵點壓力值為在 該實際的保料間曲線6運作下，於曲線中變化較為穩定 的區段中所能夠允許的管制上限及管制下限。 於步驟29巾，應用實際的該保壓時間曲線6於該射出 機，並於訊號連接該等壓力感測器的一監控系統（圖未示 )中應用該管制規則。 於步驟30巾，該監㈣統依照該f制規則8檢測成品 ，並於成品不符合該管制規則8時產生警示。於本實施例 中，當成品不符合該管制規則8的任一條件時，該監控系 統即會發出警示，但是也可較為寬鬆地調整為部分條件未 達成時即發出警示。 使用時，藉由模流分析的方法，可以得出該模具中適 合設置該等壓力感測器的壓力參考點，並於比較成品質量 後，得出理想的保屡壓力，接著將麼力訊號依序轉換成溫 度時間曲線以及屋力比容溫度曲、線5 (見圖3)，經由比較 不同壓力參考點於接近頂出溫度的最終比容變化來調整出 理想的持壓區段的壓力，進而得到供該射出機操作的實際 的保壓時間曲線6 (見圖5 )。 在實際的㈣時間曲線6應用於該射出機後，利用統 計的方法得出該管制規則8，之後即可利㈣管制規則8及 该等壓力感測器監控成品的製造過程’而達到自動筛選成 20Π41681 品的功效。 綜上所述，透過模流分析及比較麗力比容溫度曲線$ 的方式’能夠便利地調整出適當的保麼時間曲線6，相較於 現有僅使用模流分析的方法或是僅依經驗法則調整參數的 方法，本發明可對模具内部的變化掌握的更為確實，且透 過即時量測麼力訊號，能夠即時監控成品品質’故 達成本發明之目的。 ％ 处惟以上所述者，僅為本發明之較佳實施例而已，當不 =以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修/皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是本發明以模内壓力進行塑品質量之線上監_方 法的一較佳實施例的流程圖； 圖2是該較佳實施例的模擬的保壓時間曲線圖； 圖3是該較佳實施例的模擬的壓力比容溫度曲線圖； 圖4是該較佳實施例的實際的壓力比容溫度曲線圖； 圖5是該較佳實施例的實際的保壓時間曲線圖； 圖6是該較佳實施例的曲線擬合示意圖；及 圖7是該較佳實施例的質量管制分佈圖。 201141681 【主要元件符號說明】 20〜30··. •以模内壓力進行 5 ....... …壓力比容溫度曲 塑品質量之線上監控方法 線 的步驟 6 ....... …實際的保壓時間 4 ......... •模擬的保壓時間 曲線 曲線 7 ....... …壓力標準曲線 41........ •壓縮區段 8 ....... …管制規則 411…… •保壓壓力 81…… …質量管制上線 42........ •持堡£ ¥又 82…… …質量管制下限201141681 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to an injection machine, and the special material refers to an on-line monitoring method for performing plastic quality in an in-mold. [Prior Art] In the injection method of the conventional injection machine, the sol is injected into the mold, and the operation process of the injection machine is controlled to control the forming process, but since the behavior of the sol in the mold is very complicated, it is difficult to report the injection. The operating conditions of the machine are directly (4). Therefore, in recent years, the development of the mold flow analysis software has solved this problem. At present, the flow properties and forming process of the melt rubber in the mold can be easily simulated, and then the operation of the injection machine can be adjusted. condition. However, the & variability of the n sol is difficult to grasp, so the results of the simulation are still different from the actual behavior. Therefore, the finished product must be taken out after the mold is taken out to judge the quality, which is labor intensive and prone to misjudgment. The operating conditions of the injection machine are often adjusted by the user's operating experience. There is no standard operating procedure, and there is a problem that the defective product is prone to failure. SUMMARY OF THE INVENTION The object of the present invention is to provide a standard operating procedure and to automatically select the on-line monitoring method for the quality of the product by the in-mold pressure of the finished product. In the present invention, the on-line monitoring of the quality of the plastic product by the in-mold pressure is applied to the injection machine and the cookware for the injection of the plastic to form the finished product. The method of the first method precedes the complex pressure reference in the mold. A plurality of pressure sensors corresponding to the phase 201141681 are separately installed, and a dwell time curve for the operation of the injector is constructed, the dwell time curve includes a compression section having a holding pressure, and a compression is connected to the compression a holding section after the section, then applying the dwell time curve to the injection machine, and establishing a control rule in the i-control system connected to the pressure sensors, and finally the monitoring system detects according to the control rule Finished product and warning when the finished product does not comply with the regulatory rules. The effect of the invention is to use the standard operating procedures and the real-time monitoring of the monitoring system to automatically screen out the finished products that do not meet the requirements, thereby improving the quality of the products. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to Figures 1 and 2, the preferred embodiment of the method for monitoring the quality of plastic products by in-mold pressure is applied to an injection machine (not shown) and a mold for molding the finished product by the injection machine. (not shown), the method comprises the following steps 20~30. In step 20, the mold flow analysis is performed according to the machine parameters of the injection machine, the plastic parameters, and the outer dimensions of the mold, and based on the analysis results, a plurality of pressure reference points suitable for measuring the pressure change in the mold are obtained. And a simulated dwell time curve 4 suitable for use of the mold, the dwell time curve 4 including a compression section 41 having a holding pressure 411, and a holding after the compression section 41 Pressing section 42. 201141681 In this embodiment, the parameters of the machine include parameters such as injection speed, injection pressure, screw diameter, maximum pressure holding section, maximum holding pressure and clamping force. The plastic parameters include plastic specific gravity, recommended processing temperature range, etc. Parameters, the dimensions of the mold include parameters such as runner size, runner size and finished product size. The method of mold flow analysis is simulated by M〇ldfl〇w mold flow analysis software, and the selection of these pressure reference points It is required to be the far gate and the near gate of the opposite gate position, and the selection of each position is required to be stable and smooth in the pressure over-pressure, and the pressure curve is suitable for the position of curve fitting. In step 21, the corresponding plurality of pressure sensors are respectively installed at the pressure reference point positions in the mold. In step 22, the user operates the injection machine to shoot the finished product, and holds the mold at an input pressure converted by the simulated pressure holding time curve 4, and is measured by the pressure sensors. A plurality of pressure signals are used to detect whether the forming process of the finished product is the same as the simulation result. If they are not the same, re-adjust the simulation parameters and simulate again, and convert the simulated dwell time curve 4 into a new input pressure and then shoot the finished product again; if they are the same, proceed to the next step. In step 23, it is detected whether the quality of the finished product is substantially the same as a predetermined quality. If not, the simulation and the finished product are re-executed, and after being equal to the specified quality, the holding pressure in the input pressure is recorded as The ideal holding pressure. In step 24, after the pressure signals generated by the ideal pressure holding pressure applied in step 23 are operated by the pressure sensors, the complex temperature time curve β is calculated according to the 201141681 heat flow formula. 3. In step 25, using the temperature time curves obtained in step 24 for different pressure reference points and the simulated dwell time curve 4 generated in the previous step, the complex pressure specific volume temperature curve 5 is simulated and converted, and compared. In the pressure-to-pressure ratio curve 5, when the plastic is near the top temperature of the solidification, the difference between the specific values of the far gate and the near gate is the difference. If the difference value can be tolerated, the next step is performed; if the phase difference value is unacceptable, and the final specific volume change representing the different pressure reference points is not the same, then the pressure of the holding portion 42 in the dwell time curve 4 is changed and then re-changed. Simulate until the pressure specific volume temperature curve 5 is substantially equal within the temperature range close to the ejector temperature and is similar to the results after actual verification (see ® I 4). The pressure of the pressure section 42 is the pressure of the desired holding section. In the present embodiment, Fig. 3 and Fig. 4 respectively show the change in the specific volume of the far wash port and the close port in the actual operation. In step 26+, the ideal holding pressure obtained in step 23 and the pressure of the ideal holding section obtained in step 25 are constructed to form an actual dwell time curve 6 for the injection machine to stay. 5). : Read Figure 6, in step 27, 'statistically measure the pressure measured by the pressure sensors when the injection machine is fired multiple times::: mathematically establish the complex pressure corresponding to the pressure sensor Π = force only table _ should be - pressure sense in step 28 螅 7 π disk. The use of these pressure standards, and the actual pressure data of the finished product is calculated, and by using 201141681 a control rule 8, the control rules 8 includes a quality control upper limit of the finished product 81 β and the lower limit of the quality control 82, the corresponding pressure sensor's maximum pressure value (not shown), the complex number should be equal to the pressure sensor's characteristic point pressure value ( The figure is not shown). In the present embodiment, the characteristic point pressure value is a control upper limit and a lower control limit that can be allowed in a section where the change in the curve is relatively stable under the operation of the actual insured curve 6. In step 29, the actual dwell time curve 6 is applied to the injector and the control rule is applied to a monitoring system (not shown) to which the signals are connected to the pressure sensors. In step 30, the supervisor (4) inspects the finished product according to the f-rule 8 and generates a warning when the finished product does not comply with the control rule 8. In the present embodiment, when the finished product does not meet any of the conditions of the control rule 8, the monitoring system will issue a warning, but it can also be loosely adjusted to issue a warning when some conditions are not fulfilled. In use, by means of the mold flow analysis method, the pressure reference point suitable for setting the pressure sensors in the mold can be obtained, and after comparing the quality of the finished product, the ideal pressure is obtained, and then the force signal is obtained. Converted to temperature time curve and house specific temperature curve, line 5 (see Figure 3), adjust the pressure of the ideal holding section by comparing the final specific volume change of the different pressure reference points to the ejector temperature. In turn, an actual dwell time curve 6 (see Fig. 5) for operation of the injector is obtained. After the actual (four) time curve 6 is applied to the injection machine, the control rule 8 is obtained by a statistical method, and then the automatic screening can be achieved by the (4) control rule 8 and the pressure sensor monitoring the finished product manufacturing process. Selected as 20 Π 41,681 products. In summary, the method of analyzing and comparing the Lili specific pressure curve $ through the mold flow can conveniently adjust the appropriate time curve 6 according to the existing method of using only the mold flow analysis or only the experience. The method of adjusting the parameters by the law, the invention can grasp the change of the internal mold more accurately, and can monitor the quality of the finished product by measuring the force signal in real time, so the object of the invention is achieved. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the practice of the present invention, that is, the simple equivalent change according to the scope of the present invention and the description of the invention. And repairs are still within the scope of the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a preferred embodiment of the method for performing the quality of plastics in the mold by the in-mold pressure; FIG. 2 is a graph of the simulated dwell time of the preferred embodiment. Figure 3 is a graph showing the simulated pressure specific pressure temperature of the preferred embodiment; Figure 4 is a graph of the actual pressure specific pressure temperature of the preferred embodiment; Figure 5 is the actual holding pressure of the preferred embodiment. Time graph; Fig. 6 is a schematic diagram of curve fitting of the preferred embodiment; and Fig. 7 is a quality control map of the preferred embodiment. 201141681 [Description of main component symbols] 20~30··. • Performing in-mold pressure 5......... Pressure-to-temperature temperature-plastic product quality online monitoring method line Step 6 ...... . . . actual dwell time 4 ......... • Simulated dwell time curve 7 ....... ...pressure standard curve 41........ • Compression section 8 ....... ...Control Rules 411... • Holding pressure 81... ...Quality control on line 42........ • Fortress £ ¥82... ...Quality control limit