201135800 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明有關一種彎管設備，尤指一種能自動化彎曲 燈管的彎管設備。 【先前技術】 [0002] 省電燈泡由於環保、省電且發光效率高，因此自問 市以來逐漸取代傳統鎢絲燈泡，成為運用廣泛且廣受歡 迎的照明燈具。市面常見的省電燈泡均為螺旋型燈泡， 而其中大部分的螺旋燈管係由人工彎曲而成。 〇 [0003] 「圖1-1」和「圖1-2」顯示一習知之彎管模具將玻 璃直管彎曲成一蚊香型螺旋燈管的局部示意圖。傳統將 玻璃直管1彎曲成螺旋燈管的步驟，係先加熱一玻璃直管 1的中心，使其達到一可塑狀態，然後再以人工夾持玻璃 直管1的兩端，將該玻璃直管1的中心放置於一彎管模具2 的頂部而固定；接續地，啟動該彎管模具2使其旋轉，操 作者再順勢將玻璃直管1的兩端捲合於該彎管模具2，待 Q 冷卻後再退模而完成一螺旋燈管的加工。 [0004] 以人工彎曲玻璃直管1的過程中，須配合加熱單元， 俾使玻璃直管1的欲彎曲處可受熱變形。如「圖卜2」所 示，該彎管模具2的兩側可同時設置一加熱器3，該些加 熱器3可對燈管進行單點加熱，使燈管的欲彎曲處可軟化 可塑，藉此能被人力彎曲，而緊密貼合於該彎管模具2。 [0005] 然而，此種加工方式可能存在以下的問題。首先， 該些加熱器3多為瓦斯喷搶，不但無法精準控制火焰產生 的溫度，該等加熱器3亦僅能對彎曲處進行小區段或單點 099110033 表單編號A0101 第3頁/共21頁 0992017710-0 201135800 加熱，因此上述方法僅適用於清玻璃直管（即未封口之直 播離管）或非真空直管的加工，以避免因單點區域溫度過 高而發生玻璃管潰縮的現象；再者，進行清玻璃管的彎 曲時，玻璃直管1的兩端必須額外通入壓縮氣體，俾使 玻璃直管1的加熱軟化處能以氣體壓力提供支撐，以保持 其結構穩定，避免管壁軟化收縮而導致厚度不均的情況 ;此外，在加工的過程中，須完全仰賴人力，這將導致 製造的成本升高；況且，以人力進行加工的速率緩慢， 無法滿足大量製造的需求，人持燈管的移動速率、彎持 經驗與技術更將影響加工成品的品質，因此上述方式不 僅無法確實掌控成品的一致性，更易引發不良品過多、 原料浪費的問題。 [0006] [0007] 另一方面，以螺旋式的放電螢光燈管來說，經彎管 後的清玻璃管尚須進行電極密封、換氣、水銀擴散、封 口等階段。由於燈管係呈螺旋樣態進行上述過程，因此 管内的雜氣不易排除。殘存過多的雜氣會影響燈管内部 的電子碰撞，進而降低燈管的出光效率；甚者，於換氣 與水銀擴散階段，通常會以加溫烘烤方式輔助排除雜質 ，然而彎管後的螺旋燈管不能承受過高的溫度，以免燈 管受熱變形。因此由上述可知，以前述人工彎曲方式所 製成的螺旋燈管，其發光效率差，且品質不定。 【發明内容】 綜上所述，本發明之目的在於解決習知人工彎曲燈 管速率過慢的問題，進而提供一種能自動化彎曲螺旋燈 管的設備，利用不同區段的加熱單元，俾使燈管可容易 099110033 表單編號A0101 第4頁/共21頁 0992017710-0 201135800 進而縮減彎管的加工時間，提升加 [0008] [0009] 〇 〇 [0010] [0011] 地以機械方式彎曲， 工速率。 本發明之另一目的在於提出一種能適用於真空螢光 燈管的彎管設備，俾使真空螢光燈管透過本發明之彎管 設備彎曲後，能保有較佳的發光效率，提升燈管品質。 為了達成前述目的，本發明提出之彎管設備包含： 一水平加熱腔、一垂直加熱腔以及一彎管模具；該水平 加熱腔包含一彎管加熱區以及兩預熱區，該彎管加熱區 位於該兩預熱區之間，且該彎管加熱區之工作溫度高於 該兩預熱區之工作溫度；該垂直加熱腔連通該水平加熱 腔之彎管加熱區並包含一模具加熱區，該模具加熱區之 工作溫度大於或等於該彎管加熱區之工作溫度；該彎管 模具設置於該垂直加熱腔，並可於該垂直加熱腔上下位 移；其中，該模具加熱區可加熱該彎管模具於一工作溫 度，致使該彎管模具可對置於該水平加熱腔加熱之一直 划格餐推杆變菩。 在上述一實施例中，該彎管設備更包含一燈管傳送 裝置，用以傳送一直型燈管至該水平加熱腔，使直型燈 管於該水平加熱腔加熱至預設溫度。有關本發明的詳細 技術内容及實施例，配合圖式說明如後。 【實施方式】 本發明提供一種彎管設備，用以將一直條狀之玻璃 燈管以自動方式彎曲成一預設彎曲形狀，視其内之彎管 模具可將燈管彎曲成螺旋、蚊香、圓形、橢圓等各種型 式，在此並無特別限定；另一方面，本發明之彎管設備 099110033 表單編號A0101 第5頁/共21頁 0992017710-0 201135800 可適用於任何直條狀之螢光燈管的彎曲，例如冷陰極螢 光燈官或熱陰極螢光燈管，且該些螢光燈管無論是清玻 璃管，抑或是兩端已封口且内部真空者，均可適用本發 明所提出之彎管設備來彎曲，在此並無任何限制。惟， 後述的對於本發明的詳細說明，將以彎曲—螺旋型之冷 陰極螢光燈管為例，而其並非用以限定本發明，在此陳 明。有關本發明之詳細說明及技術内容，現配合圖式說 明如下： [0012] [0013] [0014] 請參閱「圖2」所示，其為本發明彎管設備1〇一實施 例之結構示意圖’本發明提出之彎管設備1〇包含：一水 平加熱腔11、一垂直加熱腔12、一彎管模具13以及一燈 管傳送裝置14。其中，垂直加熱腔12用以加熱該彎管模 具13，燈管傳送裝置14用以傳送一直型燈管2〇(顯示於厂 圖3-1」）至該水平加熱腔丨丨，使其於該水平加熱腔"加 熱至預設溫度；藉此，彎管模具13可對該直型燈管2〇進 行彎管加工，最後再脫模形成最、終成品。後述將有具體 ,：",：：....... .： 且詳細的說明： |；： ：. ·. ： ' .1 . 首先，該燈管傳送裝置14包含複數導軌141與複數個 輔助推件142(如圖各顯示兩個），該些導軌hi分別設置 於該水平加熱腔11内兩端，該些輔助推件1 4 2則分別設置 於導軌141，且可於導軌141滑移。藉此，一直型燈管2〇 兩端可分別夾持於輔助推件142而承載於導軌141，並藉 輔助推件142的推動’而將燈管定位於該水平加熱腔^内 〇 該水平加熱腔11用以加熱定位其中的直型燈管20， 099110033 表單蹁號A0101 第6頁/共21頁 0992017710-0 201135800 ❹ [0015] ❹ [0016] 其包含.一考官加熱區111以及兩預熱區;該彎管加 熱區111位於該兩預熱區112之間，且每一預熱區112自 彎管加熱區111側朝外側又可依序包含：一第一預熱區 1121與一第二預熱區1122。其中，彎管加熱區ln之工 作溫度高於該兩預熱區112之工作溫度，且該些第一預熱 區1121之工作溫度大於該些第二預熱區1丨22之工作溫度 ，俾使該直型燈管20可自兩端朝中段部分漸進式加熱。 因此，位於彎管加熱區Π1的燈管區段可受熱達到可塑型 、可彎曲但不潰縮的狀態，位於預熱區11 2的燈管段則可 提升其溫度’達到軟化而不變形的狀態。 該彎官模具1 3設置於垂直加熱腔12，並可於該垂直 加熱腔12上下位移；該垂直加熱腔12連通該水平加熱腔 11之彎管加熱區111，且包含一模具加熱區121 ;該模具 加熱區121之工作溫度大於或等於該弯管加熱區ill之工 作溫度，用以使該彎管模具1 3受熱達到工作溫度，避免 彎管模具13與直型燈管20接觸發生冷熱溫度效應而導致 直型燈管2 0劣化或義生不良熱效應與内應力。 ’ 在上述之一實施例中，該彎管加熱區U1與該模具加 熱區121的工作溫度約介於500〜80(TC，該些預熱區112 之工作溫度約介於300~700°C，確切的工作溫度可依照 該直型燈管20的玻璃材質、厚度、長度或彎曲類型而有 不同的搭配。 請配合參閱「圖3-1 j至「圖3-5 j ，其顯示該彎管 設備10自動彎曲一直型燈管20成一螺旋燈管的運作示意 圖。首先，欲彎曲的直型燈管20先置於該兩導軌141上， 099110033 表單編號A0101 第7頁/共21頁 0992017710-0 [0017] 201135800 並使該兩輔助推件142分別抵靠於該直型燈管2〇的兩端。 後，藉由控制該兩輔助推件142可將該直型燈管2〇推送 入該水平加熱腔丨丨的預設位置，如「圖34」。此時，彎 官模具13於模具加熱區12ι預熱至工作溫度，直型燈管2〇 則於彎管加熱區11丨及預熱區112的加熱下，靜置—預設 時間而使各區段升溫至一預設溫度。 [0018] [0019] 接著，當該直型燈管20受熱達到預設溫度後，此時 奇官模具13自該垂直加熱腔12上升，致使彎管模具13頂 部卡掣住直型燈管20於彎管加熱區lu的區段，如「圖 3 2」。靜置一預设時間後（例如卜6 〇.秒）開始進行彎管 。以螺旋燈管來說，彎管模具13可透過預設轉速而穩定 旋轉，致使直型燈管20能自動且順勢地環繞於該彎管模 具13的導軌141，而達到自動化彎曲的目標，如「圖3_3 」。隨著燈管的彎曲，未加熱部分會逐漸帶動至預熱區 112加熱，在被帶動至彎管加熱區U1加熱至可塑狀態， 因此考量到整體彎管的速率與傳熱硌件，在上述一實施 例中，位於該水平加熱腔U之彎管加熱區lu及預熱區 112可至少涵蓋欲處理直型燈管2〇的2/3以上長度，即彎 管加熱區111及預熱區112的加熱範圍大於該直型燈管2〇 管長的2/3。 接續地，隨著直型燈管20逐漸環繞於該彎管模具13 而帶動兩端逐漸被帶入水平加熱腔u，該輔助推件142可 配合彎管模具13的型式及轉速，推動直型燈管2〇的兩端 進入水平加熱腔11，直至該直型燈管2〇完全環繞於該彎 官模具13，如「圖3-4」。最後，該彎管模具13連同位於 099110033 表單編號A0101 第8頁/共21頁 0992017710-0 201135800 [0020] Ο [0021] Ο [0022] 其上之螺旋燈管一同下降退至非模具加熱區121的區域， 靜待冷卻彳~脫模而完成成品，如「圖3-5」。 須說明的是，上述之彎管加熱區111、第一預熱區 1121、第二預熱區1122以及模具加熱區121係針對水平 加熱腔11和垂直加熱腔12於工作運轉時不同溫度的加熱 區域來定義，實務上該水平加熱腔11及垂直加熱腔12未 必會出現分區明顯或結構、外觀特別的界線。此外，為 了容易控制加熱區域的溫度穩定性，其中之彎管加熱區 111、第一預熱區1121、第二預熱區1122以及模具加熱 區121係利用電熱線圈來加熱，該些電熱線圈可環繞水平 加熱腔11和垂直加熱腔12而設置。 由於本發明之彎管設備10設置不同的加熱區段，使 得欲彎曲直型燈管20的大部分區域可保持較高的工作溫 度，致使燈管可快速地到達可塑狀態而被彎曲變形。此 外，利用彎管模具13的旋轉並搭配輔助推件142應用，可 實現自動化彎曲燈管的目的；另一方面，由於該彎管設 備10内部的溫度控制穩定，因此可適用於真空燈管的彎 曲，例如可將内部已經塗粉、換氣、水銀擴散等階段且 兩端已封口密閉之冷陰極螢光燈管彎曲成螺旋狀，致使 其保有較佳之發光效率。 惟以上所述者，僅為本發明之較佳實施例，非欲侷 限本發明專利之專利保護範圍，故舉凡運用本發明說明 書及圖式内容所為之等效變化與修飾，均同理包含於本 發明之權利保護範圍，合予陳明。 【圖式簡單說明】 表單編號Α0101 099110033 第9頁/共21頁 0992017710-0 201135800 [0023] 本發明的實施方式係結合圖式予以描述： [0024] 「圖1-1」為習知彎管模具彎曲一蚊香型螺旋燈管的局部 示意圖； [0025] 「圖卜2」為習知彎管模具彎曲一蚊香型螺旋燈管的彎曲 不意圖， [0026] 「圖2」為本發明一彎管設備實施例之結構示意圖；及 [0027] 「圖3-1」至「圖3-5」為本發明之彎管設備進行彎管的 流程示意圖。 【主要元件符號說明】 [0028] 1.......玻璃直管 [0029] 2.......彎管模具 [0030] 3.......加熱器 [0031] 10.......彎管設備 [0032] 11.......水平加熱腔 [0033] 12.......垂直加熱腔 [0034] 13.......彎管模具 [0035] 14.......燈管傳送裝置 [0036] 20.......直型燈管 [0037] 111.......彎管加熱區 [0038] 112.......預熱區 [0039] 121.......模具加熱區 099110033 表單編號 A0101 第 10 頁/共 21 頁 0992017710-0 201135800 [0040] 141———— • · *導轨 [0041] 142 · · · · • ••輔助推件 [0042] 1121 ··· · ...第一預熱區 [0043] 1122 ··· · ..·第二預熱區 Ο Ο 099110033 表單編號Α0101 第11頁/共21頁 0992017710-0201135800 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a pipe bending device, and more particularly to a pipe bending device capable of automatically bending a lamp. [Prior Art] [0002] Since the energy-saving light bulb is environmentally friendly, energy-saving, and luminous, it has gradually replaced the traditional tungsten filament bulb since it was asked, and has become a widely used and widely used lighting fixture. The common energy-saving bulbs in the market are spiral bulbs, and most of the spiral tubes are manually bent. 〇 [0003] Figure 1-1 and Figure 1-2 show a partial schematic view of a conventional curved tube mold for bending a straight glass tube into a mosquito-repellent spiral tube. The conventional step of bending the straight glass tube 1 into a spiral tube is to first heat the center of a glass straight tube 1 to a plastic state, and then manually hold the ends of the glass straight tube 1 to straighten the glass. The center of the tube 1 is placed on the top of an elbow mold 2 and fixed; subsequently, the elbow mold 2 is activated to rotate, and the operator then winds both ends of the glass straight tube 1 to the elbow mold 2, After the Q is cooled, the mold is removed and the processing of a spiral tube is completed. [0004] In the process of manually bending the glass straight tube 1, it is necessary to cooperate with the heating unit so that the bent portion of the glass straight tube 1 can be thermally deformed. As shown in FIG. 2, a heater 3 can be disposed on both sides of the elbow mold 2, and the heaters 3 can heat the lamp tube at a single point so that the bend of the lamp tube can be softened and plasticized. Thereby, it can be bent by the human body and closely adhered to the bending mold 2. [0005] However, such a processing method may have the following problems. First of all, the heaters 3 are mostly gas squirting, not only can not accurately control the temperature generated by the flame, and the heaters 3 can only perform small sections or single points on the bends. 099110033 Form No. A0101 Page 3 of 21 0992017710-0 201135800 Heating, so the above method is only suitable for the processing of clear glass straight pipe (ie unsealed live pipe) or non-vacuum straight pipe to avoid the phenomenon of glass tube collapse due to excessive temperature in single point area. Furthermore, when the glass tube is bent, the two ends of the glass straight tube 1 must be additionally supplied with a compressed gas, so that the heating softening portion of the glass straight tube 1 can be supported by the gas pressure to keep the structure stable and avoid The wall is softened and shrunk to cause uneven thickness; in addition, in the process of processing, it must rely entirely on manpower, which will lead to an increase in the cost of manufacturing; moreover, the rate of manpower processing is slow, unable to meet the needs of mass manufacturing. The movement rate, bending experience and technology of the lamp holder will affect the quality of the finished product, so the above method can not only control the consistency of the finished product. More likely to lead to too many bad products, raw material waste problems. [0006] On the other hand, in the case of a spiral discharge fluorescent tube, the clear glass tube after the bending is still subjected to electrode sealing, ventilation, mercury diffusion, sealing, and the like. Since the lamp system performs the above process in a spiral state, the gas in the tube is not easily excluded. Excessive residual gas will affect the electron collision inside the lamp tube, thereby reducing the light-emitting efficiency of the lamp; in other cases, in the stage of ventilation and mercury diffusion, it is usually assisted to remove impurities by heating and baking, but after bending The spiral tube cannot withstand excessive temperatures to prevent the tube from being deformed by heat. Therefore, as described above, the spiral tube produced by the above-described artificial bending method has poor luminous efficiency and indefinite quality. SUMMARY OF THE INVENTION In summary, the object of the present invention is to solve the problem that the rate of the conventional artificially bent lamp tube is too slow, and further to provide an apparatus capable of automatically bending a spiral lamp tube, using different sections of the heating unit to make the lamp Tube can be easily 099110033 Form No. A0101 Page 4 / Total 21 Page 0992017710-0 201135800 Further reduce the processing time of the elbow, increase the addition [0008] [0009] 〇〇 [0010] [0011] Ground mechanical bending, work rate . Another object of the present invention is to provide a bending device suitable for a vacuum fluorescent tube, which can maintain a good luminous efficiency and enhance the tube after the vacuum fluorescent tube is bent through the bending device of the present invention. quality. In order to achieve the foregoing objective, the bending apparatus of the present invention comprises: a horizontal heating chamber, a vertical heating chamber and a bending tube mold; the horizontal heating chamber comprises a curved tube heating zone and two preheating zones, the curved pipe heating zone Located between the two preheating zones, and the operating temperature of the heating zone of the elbow is higher than the operating temperature of the two preheating zones; the vertical heating cavity is connected to the heating zone of the elbow of the horizontal heating cavity and includes a mold heating zone. The working temperature of the heating zone of the mold is greater than or equal to the operating temperature of the heating zone of the curved pipe; the bending die is disposed in the vertical heating cavity and can be displaced up and down in the vertical heating cavity; wherein the heating zone of the mold can heat the bending The tube mold is at a working temperature, so that the curved tube mold can be placed on the horizontal heating chamber to heat up the diced food push rod. In the above embodiment, the elbow device further comprises a lamp conveying device for conveying the constant lamp to the horizontal heating chamber, so that the straight lamp is heated to the preset temperature in the horizontal heating chamber. The detailed technical contents and embodiments of the present invention will be described later in conjunction with the drawings. [Embodiment] The present invention provides a bending device for bending a straight strip of glass tube into a predetermined curved shape in an automatic manner, and the curved tube mold can bend the tube into a spiral, a mosquito coil, and a circle. Various types such as shape and ellipse are not particularly limited herein; on the other hand, the bending apparatus of the present invention 099110033 Form No. A0101 Page 5 / Total 21 Page 0992017710-0 201135800 Applicable to any straight fluorescent lamp The bending of the tube, such as a cold cathode fluorescent lamp or a hot cathode fluorescent tube, and the fluorescent tubes are applicable to the present invention, whether it is a clear glass tube or a sealed and internal vacuum at both ends. The elbow device is bent, and there is no limitation here. However, the detailed description of the present invention to be described later will be exemplified by a curved-spiral cold cathode fluorescent lamp, which is not intended to limit the invention, and is hereby described. The detailed description and technical contents of the present invention will now be described with reference to the following drawings: [0012] [0014] Please refer to FIG. 2, which is a schematic structural view of an elbow device according to an embodiment of the present invention. The bending apparatus 1 of the present invention comprises: a horizontal heating chamber 11, a vertical heating chamber 12, an elbow mold 13, and a tube conveying device 14. Wherein, the vertical heating chamber 12 is used to heat the bending mold 13, and the tube conveying device 14 is configured to transmit a constant-type tube 2 (shown in the factory figure 3-1) to the horizontal heating chamber, so that The horizontal heating chamber is heated to a preset temperature; thereby, the elbow mold 13 can bend the straight tube 2〇 and finally demold to form the final product. The following will be specific,: ",::........: and a detailed description: |;: :. . . : ' .1 . First, the tube transport device 14 includes a plurality of guide rails 141 and A plurality of auxiliary pushers 142 (two are shown in the figure), the guide rails hi are respectively disposed at two ends of the horizontal heating chamber 11, and the auxiliary pushers 14 2 are respectively disposed on the guide rails 141 and can be disposed on the guide rails 141 slips. Thereby, the two ends of the constant-type lamp tube 2 can be respectively clamped on the auxiliary pushing member 142 and carried on the guide rail 141, and the lamp tube is positioned in the horizontal heating chamber by the pushing of the auxiliary pushing member 142. The heating chamber 11 is used to heat the straight tube 20 positioned therein, 099110033 Form No. A0101 Page 6 / Total 21 Pages 0992017710-0 201135800 ❹ [0016] ❹ [0016] It includes a examiner heating zone 111 and two pre- The hot zone; the elbow heating zone 111 is located between the two preheating zones 112, and each preheating zone 112 is sequentially included from the side of the elbow heating zone 111 to the outside: a first preheating zone 1121 and a Second preheating zone 1122. The operating temperature of the elbow heating zone ln is higher than the operating temperature of the two preheating zones 112, and the operating temperatures of the first preheating zones 1121 are greater than the operating temperatures of the second preheating zones 1丨22, The straight tube 20 can be progressively heated from the ends toward the middle portion. Therefore, the lamp section located in the heating zone 弯1 of the elbow can be heated to a moldable, bendable but non-crushed state, and the tube section of the preheating zone 11 2 can raise its temperature to soften without deformation. status. The bending die 13 is disposed in the vertical heating chamber 12 and can be vertically displaced in the vertical heating chamber 12; the vertical heating chamber 12 is connected to the curved heating region 111 of the horizontal heating chamber 11 and includes a mold heating region 121; The working temperature of the mold heating zone 121 is greater than or equal to the operating temperature of the elbow heating zone ill, so that the elbow mold 13 is heated to reach the working temperature, and the hot and cold temperature is prevented from contacting the elbow mold 13 and the straight bulb 20. The effect causes the straight tube 20 to deteriorate or the bad heat effect and internal stress. In one of the above embodiments, the operating temperature of the curved heating zone U1 and the mold heating zone 121 is about 500 to 80 (TC, and the operating temperature of the preheating zones 112 is about 300 to 700 ° C. The exact working temperature can be different according to the glass material, thickness, length or bending type of the straight tube 20. Please refer to "Fig. 3-1 j to "Fig. 3-5 j, which shows the bending The pipe device 10 automatically bends the operation mode of the straight lamp tube 20 into a spiral lamp tube. First, the straight lamp tube 20 to be bent is first placed on the two guide rails 141, 099110033 Form No. A0101 Page 7 / Total 21 Pages 0992017710- [0017] 201135800 and the two auxiliary pushers 142 respectively abut against the two ends of the straight tube 2〇. Thereafter, the straight tube 2 can be pushed into the control by controlling the two auxiliary pushers 142 The horizontal heating chamber has a preset position, as shown in Fig. 34. At this time, the bending die 13 is preheated to the working temperature in the mold heating zone 12, and the straight lamp 2 is in the curved heating zone 11 Under the heating of the preheating zone 112, it is allowed to stand for a preset time to warm the sections to a preset temperature. [0018] [0 019] Next, when the straight tube 20 is heated to a preset temperature, the odd mold 13 is raised from the vertical heating chamber 12, so that the top of the tube mold 13 is caught by the straight tube 20 and heated in the tube. The section of the zone lu, such as "Fig. 3 2". After a predetermined period of time (for example, 6 〇. sec.), the elbow is started. In the case of a spiral tube, the elbow mold 13 can pass the preset rotation speed. Stable rotation, so that the straight tube 20 can automatically and naturally surround the guide rail 141 of the elbow mold 13 to achieve the goal of automatic bending, such as "Fig. 3_3." As the tube is bent, the unheated portion will gradually The heating to the preheating zone 112 is heated to be heated to the plastic state in the heating zone U1 of the elbow, so that the rate of the overall elbow and the heat transfer element are considered. In the above embodiment, the horizontal heating cavity U is located. The elbow heating zone lu and the preheating zone 112 can cover at least 2/3 of the length of the straight tube 2〇, that is, the heating range of the elbow heating zone 111 and the preheating zone 112 is larger than the straight lamp 2〇. 2/3 of the length of the tube. Continually, as the straight tube 20 gradually surrounds the tube mold 13 and the two ends are gradually brought into the horizontal heating chamber u, the auxiliary pushing member 142 can cooperate with the type and the rotation speed of the bending mold 13, and push both ends of the straight tube 2 into the horizontal heating chamber 11 until the straight type The lamp tube 2 is completely wrapped around the bending die 13 as shown in "Fig. 3-4". Finally, the pipe mold 13 is located at 099110033 Form No. A0101 Page 8 / 21 pages 0992017710-0 201135800 [0020] Ο [ 0021] Ο [0022] The spiral tube thereon is lowered and retracted to the area of the non-mold heating zone 121, and is cooled until the mold is released to complete the finished product, such as "Fig. 3-5". It should be noted that the elbow heating zone 111, the first preheating zone 1121, the second preheating zone 1122, and the mold heating zone 121 are heated for different temperatures of the horizontal heating chamber 11 and the vertical heating chamber 12 during operation. The area is defined. In practice, the horizontal heating chamber 11 and the vertical heating chamber 12 do not necessarily have a boundary with a distinct partition or a special structure and appearance. In addition, in order to easily control the temperature stability of the heating zone, the elbow heating zone 111, the first preheating zone 1121, the second preheating zone 1122, and the mold heating zone 121 are heated by an electric heating coil, and the electric heating coils may be It is disposed around the horizontal heating chamber 11 and the vertical heating chamber 12. Since the elbow device 10 of the present invention is provided with different heating sections, most of the area of the straight tube 20 to be bent can maintain a high operating temperature, so that the tube can quickly reach the plastic state and be bent and deformed. In addition, by utilizing the rotation of the bending die 13 and the application of the auxiliary pushing member 142, the purpose of automatically bending the lamp can be realized; on the other hand, since the temperature control inside the bending device 10 is stable, it can be applied to the vacuum tube. Bending, for example, the cold cathode fluorescent lamp tube which has been internally coated with powder, ventilated, mercury diffused, and the like, and sealed at both ends, is bent into a spiral shape, so that it maintains a good luminous efficiency. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the patent protection of the present invention. Therefore, the equivalent changes and modifications of the present invention and the contents of the drawings are equally included in The scope of protection of the present invention is combined with Chen Ming. [Simple description of the drawing] Form No. 1010101 099110033 Page 9/21 pages 0992017710-0 201135800 [0023] Embodiments of the present invention are described in conjunction with the drawings: [0024] "FIG. 1-1" is a conventional elbow A partial schematic view of a mold bending a mosquito coil type spiral lamp; [0025] "Fig. 2" is a bending of a conventional curved tube mold, and a mosquito coil type spiral tube is not intended, [0026] "Fig. 2" is a bend of the present invention FIG. 3 is a schematic view showing the flow of a pipe bending apparatus according to the present invention; FIG. 3-1 to FIG. [Explanation of main component symbols] [0028] 1....... Glass straight tube [0029] 2....... Elbow mold [0030] 3....... Heater [0031] 10.......Bending equipment [0032] 11.......Horizontal heating chamber [0033] 12.......Vertical heating chamber [0034] 13....... Bent pipe mold [0035] 14.......Lamp tube transfer device [0036] 20....... Straight type lamp tube [0037] 111....... Bend tube heating area [0038] 112.......Preheating zone [0039] 121.......Mold heating zone 099110033 Form number A0101 Page 10 of 21 0992017710-0 201135800 [0040] 141———— • · * Guide [0041] 142 · · · · • •• Auxiliary pusher [0042] 1121 ···· ...first preheating zone [0043] 1122 ··· ····Second preheating zone Ο Ο 099110033 Form number Α 0101 Page 11 / Total 21 pages 0992017710-0