201130634 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種溫度控制器’其適用於設置射出 機具上’及其使用方法，特別是關於一種用於提供在射 出機具中之溫度控制過程之參考溫度信號的溫度控制 器及其使用方法。 【先前技術】 在射出成型製程(injection molding process)中，需維 持塑膠材料在射出成型機及各種機器元件（如喷嘴及熱 〜L道）中之溫度的精確控制，以確保使用於射出成型製 程中的塑膠材料在射出成型過程中是保持在正確的溫 度與一致性。 在射出機具中之塑膠材料的不準確溫度控制可能影 響模製成品的品質以及/或造成過多塑膠材料的浪費。 例如’熔融塑膠材料的溫度不一致可能導致外觀問題， 如模製成品中的焊線(weld-lines)、短射（short shots)、不 正確尺寸、彎曲或完成表面品質不良。在一些例子中， 特定塑膠材料（例如聚甲醛）的溫度不一致可能造成塑 膠材料的分解以及造成危險的爆炸。 在目前技術中’塑膠材料在射出機具中的溫度是利 用商業上可取得的外部溫度控制器來控制，此外部溫度 控制器是位於射出機具之外，外部溫度控制器是通過信 號電纜線來連接於溫度感測裝置，例如熱電偶 201130634 (thermocouples) ’以及溫度控制元件，例如加熱器，其 設置於射出機具中。 在外部溫度控制器的操作中，目前發現此外部溫度 控制器可能無法精確地反應熔融塑膠材料在射出機具 中的實際溫度。在一些測試中，同一射出機具的溫度是 由連接的二個外部溫度控制器所傳導，可以發現儘管在 相同的設定下這二個外部溫度控制器常提供不同的讀 數。再者’因外部溫度控制器之位置改變所影響的信號 線長度或位置不同’可能導致射出機具内的熔融塑膠材 料在相同溫度下具有不同的讀數。 在大型射出機具中的多個區域需進行加熱及保溫， 使得上述問題更趨惡化。在此先前技術中，多個外部溫 度控制器係被使用。然而，這些外部溫度控制器之間的 讀數不準確及不__致會導致難以保持準確性及一致性 控制於塑料的溫度上。 為了克服上述問題，有必要在操作前進行外部溫度 控制器的h 或其，正。然而，對於外部溫度控制器的位置改變 二或：在操作過程的環境條件改變，其可能造成信號損 意動，而導致溫度控制的不準確，校正並不是一滿 在〜決方案。為了確保非常準確的溫度控制，有必要 疋的間隔中對外部溫度控制器進行再校正。 【發明内容】 本發明係定義 於獨立專利申請範圍中，有些本發明 201130634 的非必須特徵係定義於附屬專利申請範圍中。 相較於現有技術的溫度控制器，具有獨立專利申請 範圍之特徵的溫度控制器可提供多種技術優點，這些優 點之一為使用一光耦合器28和一固態切換元件34於電 路100中，以取代習知之其他控制電路_ 一般使用之傳 送與傳換電路，使得電路1〇〇可使用較低電力消耗元件 來取代習知之其他控制電路中所使用的較高功率元 件。藉此，溫度控制器可實質地小於習知之外部溫度控 制器，因而可容易地直接設置此溫度控制器於射出機具 再者，藉由直接設置此溫度控制器於射出機具上， 可排除上述因連接於傳統外部溫度控制器之長信號纜 線中的信號損耗所導致之不精確及反應時間較慢的問 題。 【實施方式】 為讓本發明之上述和其他目的、特徵、優點與實施 例能更明顯易懂，本說明書將特舉出—系列實施例來加201130634 VI. OBJECTS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a temperature controller 'which is suitable for setting an injection tool' and a method of using the same, and more particularly to a temperature control process for providing an injection tool The temperature controller that references the temperature signal and its method of use. [Prior Art] In the injection molding process, it is necessary to maintain precise control of the temperature of the plastic material in the injection molding machine and various machine components (such as the nozzle and the heat to the L channel) to ensure the use in the injection molding process. The plastic material in the process is kept at the correct temperature and consistency during the injection molding process. Inaccurate temperature control of the plastic material in the injection tool may affect the quality of the molded article and/or cause waste of excess plastic material. For example, 'inconsistent temperature of molten plastic materials may cause appearance problems such as weld-lines, short shots, improper size, bending or poor surface quality in molded articles. In some instances, inconsistent temperatures of certain plastic materials (e.g., polyoxymethylene) may cause decomposition of the plastic material and cause a dangerous explosion. In the current technology, the temperature of the plastic material in the injection tool is controlled by a commercially available external temperature controller, which is located outside the injection device, and the external temperature controller is connected by a signal cable. A temperature sensing device, such as thermocouple 201130634 (thermocouples), and a temperature control element, such as a heater, are disposed in the injection tool. In the operation of the external temperature controller, it has been found that this external temperature controller may not accurately reflect the actual temperature of the molten plastic material in the injection tool. In some tests, the temperature of the same injection tool was conducted by two external temperature controllers connected, and it was found that the two external temperature controllers often provided different readings at the same setting. Furthermore, the length or position of the signal line affected by the change in the position of the external temperature controller may cause the molten plastic material in the injection tool to have different readings at the same temperature. Heating and heat preservation are required in a plurality of areas of large-scale injection equipment, which makes the above problems worse. In this prior art, a plurality of external temperature controllers are used. However, inaccurate readings between these external temperature controllers and the inability to maintain accuracy and consistency are controlled by the temperature of the plastic. In order to overcome the above problems, it is necessary to perform h or its positive of the external temperature controller before operation. However, for the position change of the external temperature controller 2 or: the environmental conditions during the operation change, which may cause signal loss, resulting in inaccurate temperature control, the correction is not a full solution. To ensure very accurate temperature control, it is necessary to recalibrate the external temperature controller in the 疋 interval. SUMMARY OF THE INVENTION The present invention is defined in the scope of the independent patent application, and some non-essential features of the present invention 201130634 are defined in the scope of the appended patent application. A temperature controller having the features of the independent patent application provides a number of technical advantages over prior art temperature controllers, one of which is the use of an optocoupler 28 and a solid state switching element 34 in the circuit 100. Instead of other conventional control circuits _ generally used transmission and transfer circuits, the circuit 1 can use lower power consuming components to replace the higher power components used in other conventional control circuits. Thereby, the temperature controller can be substantially smaller than the conventional external temperature controller, so that the temperature controller can be easily directly disposed on the injection tool, and the above-mentioned cause can be eliminated by directly setting the temperature controller on the injection tool. The problem of inaccuracies and slow response times caused by signal loss in long signal cables connected to conventional external temperature controllers. [Embodiment] The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.
’標號100 —般係表示溫度控制器的 請先參照圖1，標;'100 is generally used to indicate the temperature controller. Please refer to Figure 1, first;
等來的一感測溫度信號。電路 麵接於比較器的輸出，以及一 100亦包括一光輕合器， 201130634 固態切換元件’用以切換一電源供應至射出機具的一加 熱器。固態切換元件接收由光耦合器傳來的一啟動信 號，其係依次地回應於比較器的一輸出狀態變化。 比較器12係比較第一輸出14與第二輸出16，第一 輸出14係表示一感測溫度值，其來自溫度感測元件， 例如位於射出機具内（未繪示）的熱電偶 (thermocouple)，第二輸出16係表示一預設參考溫度。 在一揭露技術中，此參考溫度係利用一參考溫度選擇電 路（reference temperature selection circuit)來預先決定， 其會詳述於下文。比較器12的輸出18係經由電阻-電 容電路(R-C circuit)來連接於直流(DC)電源，並連接至 光耦合器。在圖1的範例中，比較器的輸出18係串聯 於R-C電路，其包含並聯的電容20及電阻22，且其依 次地串聯於DC電源36。比較器12的輸出係更串聯於 任意的發光二極體24’用以提供一視覺參考至使用者。 且比較器12的輸出更串聯於光耦合器28的輸入26， 用以隔絕電路，並轉換此DC輸入至一放大AC輸出 30。此光耦合器28的AC輸出30係更串聯於固態切換 元件34的閘極輸入32，用以切換一電源供應（未繪示） 至射出機具（亦未繪示）的加熱器。在圖1的範例中，固 態切換元件34係一三極交流開關（triaC)’但亦可為其 種類的固態切換元件，其可依照此加熱器之電源的形式 來選擇。 此比較器12可確認所提供至第一輸入14的第二溫 201130634 度以及提供至第二輸入16的參考溫度值，當射出機具 内的塑料尚未被加熱時’溫度感測元件（未繪示）所提供 至第一輸入14的感測溫度值係低於提供至第二輸入16 的參考溫度值。比較器12的輸出18係經由一内建電晶 體（未繪示）的操作’來由一短路於地的關閉電路切換至 一開啟電路。此DC電源36的電源會流經此電容2〇與 電阻22並聯之RC電路’而流至此光麵合器28。當電 流流至此光麵合器28，在光耦合器之輸入侧的led(未 繪示）係被通電，而啟動在光耦合器28之輸出侧的一電 隔離光觸發的三極交流開關（galvanic separated optically triggered triac ’未繪示）’此光耦合器28之輸 出侧的光觸發三極交流開關（未繪示）會提供一啟動信 號至固態切換元件34。在圖1的範例中，此光麵合器 28切換AC電源並提供一 AC輸出30,以依次地切換三 極交流開關34來提供電力至加熱器（未繪示）。此固態 切換元件依次地接收來自光耦合器的啟動信號，其係回 應於比較器的輸出狀態變化。亦即，當比較器的輸出狀 態改變時，此DC電源提供電力至光耦合器，使得光耦 合器提供啟動信號至固態切換元件。 當射出機具内的塑料已到達或接近預期溫度時，溫 度感測70件所提供至第一輸入14的感測溫度值係等於 或兩於所提供至第二輸入16的參考溫度值，且比較器 12的輸出18係經由比較器12内的内建電晶體（未繪示) 的操作’來由H啟電路來切換至—短路於地的關閉電 8 201130634 路，因而來自DC電源36的電流會停止流至光耦合器 28，並被轉向至地。光耦合器28未通電，且提供至三 極交流開關34的啟動信號被移除。當電源供應信號接 著為零，三極交流開關34係切換至未導通狀態，因而 提供至射出機具（未繪示）之加熱器（未繪示）的電力係被 切斷。 已發現的是，此溫度控制器可更準確，且相較於傳 統之外部溫度控制器，具有一快速反應時間。此係由於 大尺寸之外部溫度控制器需設置於射出機具的遠端，因 而需使用長信號纜線於外部溫度控制器與射出機具之 間。沿著長信號纜線中的信號損耗會導致傳統外部溫度 控制器具有較低的敏感度以及較慢的反應時間。例如， 來自射出成型機之射出機具内之溫度感測元件的讀數 會顯示出熔融塑料之些微的溫度下降或增加，其會決定 成型產品的品質，此讀數可能在傳送的過程中被減少， 而可能無法被外部溫度控制器所接收。由於改善後之溫 度控制器係直接設置於射出成型機之工具上，因而可排 除上述因連接於傳統外部溫度控制器之長信號纜線中 的信號損耗所導致之不精確及反應時間較慢的問題。 如圖2所示，標號200係表示溫度控制器，用以提 供在射出機具中之溫度控制過程的一參考溫度信號。此 溫度控制器具有一參考溫度選擇電路，用以供使用者來 選擇於第一及第二參考溫度之間。 電路200包括DC電源62，其連接於第一可調電阻 201130634 64及第二可調電阻6 以供使用者來選擇第一來第一可調電阻64係用 用以供使用者二參第二可調電… 選擇開Μ 68,用以切換於第:第電路2〇〇包括第一 在圖2的範例中，第一及 一可調電阻之間。 電阻，每-值的預調電阻64,為可變 的的輸出係連接平行配置°可調電阻… 路之間，或者=^=：：_66的開啟電 調電阻6 ‘的開啟，路之：=關閉電路以及第-可 使用者來選擇於第 、 68的操作可允許 調電阻64具有一範圍信第~7_且64 ,之間。可 件。可調電阻66具有照於射出機具的操作條 預備條件。因此機具的 出機具：::：一作參 亏恤度k號或一對應於射 丁 J矛爹 考溫度信號。在圖2的範：ψ 、之預備條件的第二參 相關於射出機具内塑二第;^考溫度信號係 號係相關於塑料的預備溫度，此些：:考'靡 係依據可調電阻64、66的個別電阻值來提^溫度^ 第一選擇開關68係連接於（第 選擇連接於至少第一電阻72及： 用以 72的電阻值係不同於第 ，第-電阻 7〇可允畔#用去㈣ 的電阻值。選擇開關 允許使用者依據使用於射出機具内的_來調整 201130634 第及第一參考溫度信號之一（經由操作選擇開關68來 選擇可調電阻64、66之一所提供）。因此，若此射出機 具係用，操作二種不同塑料，電阻72、74的值會被選 擇使知參考度k號輸出係對應於一數值，例如適用 於所之塑料之操作或預備條件的預期溫度。在圖2 的範例中，三個更多的電阻76、78、8〇 接於第二選擇開關7〇。因此，總共5個電阻？2;'74、 76、78及80分別具有預設值（適用於使用於射出機具内 的5種不同塑料）’其相互並聯地配置，用於選擇於電 阻72的關閉電路及電阻74、76、78及80的開啟電路 之間、電阻74的關閉電路及電阻72、76、78及8〇的 開啟電路之間、電阻76的關閉電路及電阻72、74、78 及80的開啟電路之間、電阻78的關閉電路及電阻α、 74 76及80的開啟電路之間、或者電阻8〇的關閉電 路及電阻72、74、76及78的開啟電路之間。電路2〇〇 的輸出提供一參考溫度信號，用於溫度控制過程。例 如，此輸出可連接至圖1中之比較器12的第二輸入。 此參考溫度信號係依據對於塑料之操作或預備條件的 使用者選擇以及所使用之塑料的種類。 當串聯至電阻72、74、76、78或80的任何一者時， 可調電阻64、66之數值的預設範圍係被選擇，以提供 -可調整值及-數值，此可觀絲進行或操作溫 度，此數值表示-等待或預備溫度^此進行或操作溫度 係一預設最佳溫度，用於此已選擇之射出成型的塑1斗^ 201130634 預備溫度係、-預設安全溫度，用於保持塑料的 降。特別重要的是，當工作於敏感材料時， 歹’聚縮醛樹脂(P〇lyacetal)，聚縮醛樹脂之溫声’ 定會導致危險的爆炸。 又心 作來在選電摆路二操作中，使用者經由第二選擇開關70的操 t來選擇於電阻72、74、76、78及80之間， 選擇材料的預期參考溫度。使用者接著經由第一 關68的操作來選擇於一進行或操作溫度以及一等待^ 預備溫度之間，其中第—選擇開關68係選擇於第一可 調電阻64與第二可調電阻66之間。 可調電阻64或66之一以及電阻72、74、76、78或 之-㈣合值會提供—數值至控财路刚之比較 的第二輪入16，此數值係表示所選擇塑料之進行 5钿作溫度以及等待或預備溫度的其中一者。 藉由調整可調電阻64或66的任何一者，參考溫度 可#的變動或微調可被適當地調整。可調電阻 或66的數值可被多功能電錶(muiti_m =轉Γ溫度表(未繪示)’其具有預計算值:用 簡易地轉換此電錶的讀數至溫度值。 一笛_ 1射出機具中需加熱和保溫多個區域的溫度， 電路^另田一控制電路1〇0可連接於此參考溫度選擇 以控制多區域的溫度。祕控制多區域的 同參考溫度的"·具控制器會更精確。在現 ^有需要使用多個外部溫度控制器來控制多區 12 201130634 域的'皿度’每—外部溫度控制n係接著被設定來控制及 =持每個別區域的溫度。已發現的是，由於每一外部 溫度控制器之元件中的公差（tolerance differences)，因 而不可能維持這些區域在同—溫度。當兩控制電路皆由 相同之參考溫度控制電路得到其參考溫度時，此問題可 被改善。 如圖3所示，標號300 —般是表示溫度控制器，用 以控制多區域的溫度，並配合於這二健制電路⑽及 參考溫度選擇電路2〇〇。 、若需進行多區域的溫度控制，另-控制電路100可 被增設於溫度控制器300中。 此溫度控制器係設置於射出成型機的機具上，並連 接於溫度感測元件（例如熱電偶）以及溫度控制元件⑽ 如加熱器）°為了較容易地設置此溫度控制器於射出成 型機的機具上，此溫度控制器較佳係置於—具熱隔 性的殼體。 、 雖然本發明已以較佳實施例揭露，然其並非用以限 制本發明’任何熟習此項技藝之人士，在不脫離本發明 之精神和内’當可作各種更動歸飾，因此本發明 之保護範圍當視後附之巾料利範圍所界定者為準。 【圖式簡單說明】 圖1係一改善機具控制器的控制電路圖。 圖2顯示-改善機具控制器之參考溫度選擇電路的示 13 201130634 意圖。 圖3係一改善機具控制器的電路圖，其配合於二控制電 路及一參考溫度選擇電路。 【主要元件符號說明】 100控制電路 300溫度控制器 12比較器 16第二輸出 20電容 24發光二極體 28光耦合器 30 AC輸出 34固態切換元件 64第一可調電阻 68第一選擇開關 70第二選擇開關 200參考溫度選擇電路 14第一輸出 18輸出 22電阻 26輸出 3 2閘極輸入 36、62 DC 電源 66第二可調電阻 72、74、76、78、80 電阻Waiting for a sensed temperature signal. The circuit is connected to the output of the comparator, and a 100 also includes an optical combiner. The 201130634 solid state switching element is used to switch a power supply to a heater of the injection tool. The solid state switching element receives a start signal from the optocoupler that in turn responds to an output state change of the comparator. The comparator 12 compares the first output 14 with the second output 16, the first output 14 representing a sensed temperature value from a temperature sensing element, such as a thermocouple located within the firing tool (not shown). The second output 16 represents a predetermined reference temperature. In a disclosed technique, this reference temperature is predetermined using a reference temperature selection circuit, which will be described in more detail below. The output 18 of the comparator 12 is coupled to a direct current (DC) power supply via a resistor-resistor circuit (R-C circuit) and to the optocoupler. In the example of Figure 1, the output 18 of the comparator is connected in series with an R-C circuit comprising a capacitor 20 and a resistor 22 in parallel, which are in turn connected in series with the DC power source 36. The output of comparator 12 is further connected in series to any of the LEDs 24' to provide a visual reference to the user. The output of comparator 12 is further coupled in series with input 26 of optocoupler 28 for isolating the circuit and converting the DC input to an amplifying AC output 30. The AC output 30 of the optocoupler 28 is further coupled in series with the gate input 32 of the solid state switching component 34 for switching a power supply (not shown) to a heater of an injection tool (also not shown). In the example of Figure 1, the solid state switching element 34 is a three-pole alternating current switch (triaC) but may also be a solid state switching element of its kind, which may be selected in accordance with the power supply of the heater. The comparator 12 can confirm the second temperature 201130634 degrees provided to the first input 14 and the reference temperature value provided to the second input 16 when the plastic in the injection tool has not been heated 'temperature sensing element (not shown The sensed temperature value provided to the first input 14 is lower than the reference temperature value provided to the second input 16. The output 18 of the comparator 12 is switched from a short circuit to ground circuit to an open circuit via operation of a built-in transistor (not shown). The power of the DC power source 36 flows through the capacitor RC circuit 〇 in parallel with the resistor 22 and flows to the optical combiner 28. When a current flows to the optical combiner 28, a led (not shown) on the input side of the optical coupler is energized to activate an electrically isolated light-triggered three-pole AC switch on the output side of the optical coupler 28 ( Galvanic separated optically triggered triac 'not shown' The light-triggered three-pole AC switch (not shown) on the output side of this optocoupler 28 provides an enable signal to the solid state switching element 34. In the example of Figure 1, the optical combiner 28 switches the AC power source and provides an AC output 30 to sequentially switch the three-pole AC switch 34 to provide power to a heater (not shown). The solid state switching element sequentially receives an enable signal from the optocoupler that is responsive to changes in the output state of the comparator. That is, when the output state of the comparator changes, the DC power source provides power to the optocoupler such that the optocoupler provides an enable signal to the solid state switching element. When the plastic in the ejection tool has reached or approached the expected temperature, the temperature sensing 70 provides a sensed temperature value that is equal to or equal to the reference temperature value provided to the second input 16 and is compared. The output 18 of the device 12 is switched by the H-start circuit via the operation of the built-in transistor (not shown) in the comparator 12 to - the short-circuit to the ground 8 201130634, thus the current from the DC power source 36 Flow to the optocoupler 28 is stopped and turned to ground. The optocoupler 28 is not energized and the enable signal provided to the three-pole AC switch 34 is removed. When the power supply signal is connected to zero, the three-pole AC switch 34 is switched to the non-conducting state, so that the power supplied to the heater (not shown) of the injection tool (not shown) is cut off. It has been found that this temperature controller is more accurate and has a fast response time compared to conventional external temperature controllers. This is because the large external temperature controller needs to be placed at the far end of the injection tool, so a long signal cable is required between the external temperature controller and the injection tool. Loss of signal along long signal cables can result in lower sensitivity and slower response times for traditional external temperature controllers. For example, a reading from a temperature sensing element within the injection tool of the injection molding machine will show a slight decrease or increase in the temperature of the molten plastic, which will determine the quality of the molded product, which may be reduced during the transfer. It may not be accepted by the external temperature controller. Since the improved temperature controller is directly disposed on the tool of the injection molding machine, the inaccuracy and slow reaction time caused by the signal loss in the long signal cable connected to the conventional external temperature controller can be eliminated. problem. As shown in Fig. 2, reference numeral 200 denotes a temperature controller for providing a reference temperature signal for the temperature control process in the injection tool. The temperature controller has a reference temperature selection circuit for the user to select between the first and second reference temperatures. The circuit 200 includes a DC power source 62 connected to the first adjustable resistor 201130634 64 and the second adjustable resistor 6 for the user to select the first one. The first adjustable resistor 64 is used for the user to participate in the second Adjustable power... Selecting the opening 68 for switching to the first: the second circuit includes the first in the example of FIG. 2, between the first and an adjustable resistor. Resistor, per-value pre-adjustment resistor 64, for variable output system connection parallel configuration ° adjustable resistance... between the road, or =^=::_66 open the ESC 6' opening, the road: The shutdown circuit and the user-selectable operation of the sixth, 68 allow the tuning resistor 64 to have a range of signals between ~7_ and 64. Yes. The adjustable resistor 66 has an operating strip preparation condition for the injection tool. Therefore, the machine tool:::: one for the loss of the degree of k or one corresponding to the shooting J spear test temperature signal. In Fig. 2, the second parameter of the preparation condition is related to the injection molding machine. The temperature signal system number is related to the pre-heating temperature of the plastic, and these:: The individual resistance values of 64 and 66 are used to raise the temperature. The first selection switch 68 is connected to (selectively connected to at least the first resistor 72 and: the resistance value for 72 is different from the first, and the first resistor 7 is acceptable. The resistance value of the side (4) is used. The selection switch allows the user to adjust one of the 201130634 first and first reference temperature signals according to the _ used in the injection tool (select one of the adjustable resistors 64, 66 via the operation selection switch 68). Therefore, if the injection tool is used, two different plastics are operated, and the values of the resistors 72, 74 are selected so that the reference k output corresponds to a value, for example, for the operation of the plastic or The expected temperature of the pre-condition. In the example of Figure 2, three more resistors 76, 78, 8 are connected to the second selector switch 7 因此. Therefore, a total of 5 resistors ? 2; '74, 76, 78 and 80 have preset values (for use in injection equipment) 5 different plastics' are arranged in parallel with each other for selection between the shutdown circuit of the resistor 72 and the open circuit of the resistors 74, 76, 78 and 80, the shutdown circuit of the resistor 74 and the resistors 72, 76, 78 and 8〇 between the open circuit, the closed circuit of the resistor 76 and the open circuit of the resistors 72, 74, 78 and 80, the closed circuit of the resistor 78 and the open circuit of the resistors α, 74 76 and 80, or the resistor 8 The closing circuit of the cymbal and the opening circuit of the resistors 72, 74, 76 and 78. The output of the circuit 2 提供 provides a reference temperature signal for the temperature control process. For example, the output can be connected to the comparator of FIG. The second input of 12. The reference temperature signal is based on the user selection of the operation or pre-conditions for the plastic and the type of plastic used. When connected in series to any of resistors 72, 74, 76, 78 or 80, The preset range of values of the adjustable resistors 64, 66 is selected to provide - an adjustable value and a - value, which can be performed or operated at a temperature which indicates - waiting or pre-heating temperature or operating temperature is one Preset optimal temperature For this selected injection molding plastic 1 bucket 2011 30634 pre-heating system, - preset safe temperature, used to keep the plastic drop. Especially important, when working on sensitive materials, 歹 'polyacetal resin (P〇lyacetal), the warmth of the polyacetal resin will definitely lead to a dangerous explosion. In addition, in the operation of the elective swing, the user selects the resistor 72 via the operation of the second selector switch 70. Between 74, 76, 78, and 80, the expected reference temperature of the material is selected. The user then selects between one of the operating or operating temperatures and a waiting for the preparatory temperature via the operation of the first switch 68, wherein the first select switch The 68 series is selected between the first adjustable resistor 64 and the second adjustable resistor 66. One of the adjustable resistors 64 or 66 and the resistors 72, 74, 76, 78 or - (iv) will provide a second round-in 16 of the value-to-control comparison, which represents the progress of the selected plastic. 5 钿 temperature and one of the waiting or preparatory temperatures. By adjusting any of the adjustable resistors 64 or 66, the variation or fine adjustment of the reference temperature can be appropriately adjusted. The value of the adjustable resistor or 66 can be used by the multi-function meter (muiti_m = switch temperature meter (not shown)' which has a pre-calculated value: simply convert the meter's reading to the temperature value. A flute _ 1 in the machine It is necessary to heat and keep the temperature of multiple areas, and the circuit control circuit 1〇0 can be connected to this reference temperature to control the temperature of multiple areas. The control unit of the same reference temperature of multiple areas is controlled. More precise. There is a need to use multiple external temperature controllers to control the multi-zone 12 201130634 domain 'span' per-external temperature control n is then set to control and = hold the temperature of each zone. Because of the tolerances in the components of each external temperature controller, it is impossible to maintain these regions at the same temperature. When both control circuits get their reference temperature from the same reference temperature control circuit, this The problem can be improved. As shown in Fig. 3, reference numeral 300 generally denotes a temperature controller for controlling the temperature of the plurality of regions, and is matched with the two circuit (10) and the reference temperature selection circuit. 2. If multi-zone temperature control is required, the additional-control circuit 100 can be added to the temperature controller 300. The temperature controller is disposed on the tool of the injection molding machine and connected to the temperature sensing component. (For example, a thermocouple) and a temperature control element (10) such as a heater). In order to easily set the temperature controller on the machine of the injection molding machine, the temperature controller is preferably placed in a housing having a thermal barrier. The present invention has been disclosed in its preferred embodiments, and it is not intended to limit the invention to those skilled in the art, and the present invention can be used in various embodiments without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the towel. [Simple description of the drawing] Fig. 1 is a control circuit diagram for improving the implement controller. Figure 2 shows the indication of the reference temperature selection circuit for improving the implement controller. Figure 3 is a circuit diagram of an improved implement controller that is coupled to two control circuits and a reference temperature selection circuit. [Main component symbol description] 100 control circuit 300 temperature controller 12 comparator 16 second output 20 capacitor 24 light emitting diode 28 optical coupler 30 AC output 34 solid state switching element 64 first adjustable resistor 68 first selection switch 70 Second selection switch 200 reference temperature selection circuit 14 first output 18 output 22 resistance 26 output 3 2 gate input 36, 62 DC power supply 66 second adjustable resistance 72, 74, 76, 78, 80 resistance