200924950 九、發明說明： 【發明所屬之技術領域】 上的二段式射出機構。 【先前技術】 現有的注賴上的二段式射出機構的料管分為内裝螺杆的螺杆料 官和内裝活塞的注射料管’螺杆料管的前端通過一個通道連接到注射 料管的活塞腔的前端。注射料管的前端有喷嘴，活塞後部連接一液壓 ◎缸。活塞腔在進料時，依靠液態料的壓力使活塞後退，以增大活塞腔 的容積。由於在注射時，料液不是完全被射出的，在活塞端面上總會 殘留物料，而活塞腔的進料是前端注入式，因此，活塞端面附近形成 物料死角，此處的物料總是留在活塞端面上，由此造成物料端面的物 料碳化。其二欠，活塞的反復移動容易磨損料管内壁，另—方面活塞腔 依靠活塞與料管壁來密封，兩者之間必須有精確的尺寸配合，加工要 求很高，由此’料管和活塞使用—段的時間就會因為磨損而需要整修 零或更換’來確保活塞與料管内壁的配合尺寸，除使成本增加外更影響 產品品質與生產進度。此外，活塞需要越管内壁密封，還造成注射 速度k，活塞只能低速在料管内推進，否則會到傷料管内壁，完全不 適於高速成型的生產。 【發明内容】 本發明要解決現有技術的上述雜，提供_種避免物料在料管内 碳化、耐用、注射速度快的二段式射出機構。 本發明所述的二段式射出機構包括喊螺杆_杆料管和注射料 200924950 S ’螺杆料《TJi有加鮮置’螺杆料管的前端通過—鶴通管連接到 庄射料g料g上裝有單棚，螺杆連接有旋轉购機構，注射料 管的前端裝有喷嘴，其特徵在於：注射料管的後部設有環形支承座， 活塞杆可滑動地設置在所述的支承座中，活塞杆與支承座密封配合； 活塞杆與注射料管的壁面之間有間隙，活塞杆連接推躲；注射料管 的物料輸入口位於所述的支承座的前端。 H所述的活塞杆和支承麟用可自靖材料製成。 ® 所述的活塞杆表面經過碳化處理以保證潤滑防止磨損。 注射料g的物料進口位於支承座前端，物料進人注射料管後沿活 .塞杆與管壁的間隙流向注射料管前部的空腔，逐漸將活塞杆推後，待 流场料足錢’推躲啟動，軸活塞杆前進將絲物料經過喷嘴 射入模具中。 、 與現有技術相比，本發明的注射料管的入料方式是後進式的，保 證了不存在物料死角’能有效地防止物料碳化。其次，活塞杆盥管壁 層不存在摩擦、不需要密封，一方面降低了管壁加工精度的要求，另一 方面消除了管壁的磨損’延長了料管使用壽命，還可以免除頻繁的大 修’降低維護成本’提高生產效率[及保證產品品質外更能滿足高速成 型的要求]。最後，本發明還能夠在提高注射速度時保證管壁不被磨 \核明的磨損件是支承座，且已經過耐磨材料處理不易磨損大大 的提间的伽壽命，支承触卿麵得乡，轉啦需 座，除了降低降低成本節約工時外更能提升產品品f。 、 本發明的優點是：避免物料在料管内碳化、耐用、可滿足高速注 200924950 射成型。 【實施方式】 參照第一圖、第二圖： 本發明糊：蝴糊咖 . 射料管8，螺杆料管3上有力 2杆抖吕4和注 •通管6 __解δ，連骑6上财單_，螺杆 = 内轉驅動機構，注射料管8的前端裝有她。所述的旋轉驅動機^ f)伺服電機2和減速機！組成 動機構由 风所这的早向閥疋由止逆闕5 注射料管8的後部設有環形找座1 的閥門200924950 IX. Description of the invention: [Technical field to which the invention pertains] The two-stage injection mechanism. [Prior Art] The tube of the two-stage injection mechanism of the prior art is divided into a screw member with a built-in screw and an injection tube with a built-in piston. The front end of the screw tube is connected to the injection tube through a passage. The front end of the piston chamber. The front end of the injection tube has a nozzle, and the rear of the piston is connected to a hydraulic cylinder. When the piston chamber is fed, the pressure of the liquid material is used to retreat the piston to increase the volume of the piston chamber. Since the liquid is not completely ejected at the time of injection, the material remains on the end face of the piston, and the feed of the piston chamber is the front end injection type. Therefore, a dead space is formed near the end face of the piston, and the material here always remains. On the end face of the piston, the material of the end face of the material is thereby carbonized. Secondly, the repeated movement of the piston is easy to wear the inner wall of the material tube. On the other hand, the piston chamber is sealed by the piston and the wall of the material tube. There must be precise size matching between the two, and the processing requirements are very high, thus the material tube and The use of the piston - the time of the section will need to be repaired or replaced due to wear to ensure the fit of the piston and the inner wall of the tube, in addition to increasing the cost and affect the product quality and production schedule. In addition, the piston needs to be sealed over the inner wall of the pipe, and the injection speed k is also caused. The piston can only be propelled in the material pipe at a low speed, otherwise it will go to the inner wall of the wound pipe and is completely unsuitable for high-speed molding production. SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art, and provides a two-stage injection mechanism for avoiding carbonization, durability, and rapid injection speed of materials in a material tube. The two-stage injection mechanism of the invention comprises a shouting screw_rod tube and an injection material 200924950 S 'screw material "TJi plus freshly placed" front end of the screw material pipe is connected to the Zhuang projecting material g The utility model is provided with a single shed, the screw is connected with a rotary purchase mechanism, and the front end of the injection pipe is equipped with a nozzle, wherein the injection pipe is provided with an annular support seat at a rear portion thereof, and the piston rod is slidably disposed in the support seat. The piston rod is in sealing engagement with the bearing seat; there is a gap between the piston rod and the wall surface of the injection tube, and the piston rod is connected to push and push; the material input port of the injection tube is located at the front end of the support seat. The piston rod and the supporting lining described in H are made of self-contained materials. The piston rod surface described is carbonized to ensure lubrication and wear. The material inlet of the injection material g is located at the front end of the support seat, and the material flows into the cavity of the front part of the injection tube along the gap between the live plug and the tube wall after the material is injected into the injection tube, and the piston rod is gradually pushed back, and the flow field is sufficient. The money 'dos not start, the shaft piston rod advances the silk material into the mold through the nozzle. Compared with the prior art, the injection tube of the present invention is fed in a backward manner, and the absence of a material dead angle is ensured to effectively prevent carbonization of the material. Secondly, there is no friction and no sealing on the wall of the piston rod manifold. On the one hand, the machining accuracy of the pipe wall is reduced, and on the other hand, the wear of the pipe wall is eliminated, the service life of the pipe is prolonged, and frequent overhaul can be eliminated. 'Reducing maintenance costs' to improve production efficiency [and to ensure the quality of products can meet the requirements of high-speed molding]. Finally, the invention can also ensure that the wear part of the pipe wall is not grounded when the injection speed is increased, and the wear part is the support seat, and has been treated by the wear-resistant material, which is not easy to wear, and has a large life of the lift, and the support touches the surface. In addition to reducing the cost and saving time, it can improve the product quality. The invention has the advantages of avoiding carbonization and durability of the material in the material pipe, and can meet the high-speed injection molding of 200924950. [Embodiment] Referring to the first figure and the second figure: The paste of the present invention: the butterfly paste. The shot tube 8, the screw tube 3 has a strong 2 rod shaking Lu 4 and the injection pipe 6 __ solution δ, even riding 6 on the financial bill _, screw = internal rotation drive mechanism, the front end of the injection tube 8 is equipped with her. The rotary drive machine ^ f) servo motor 2 and reducer! The moving mechanism is provided by the wind to the early valve, and the rear of the injection pipe 8 is provided with a ring-shaped seat 1 valve.
在所述的支承座u中，活夷杆1〇斜心舌基杆10可滑動地設置 與、__ U料配合；活塞杆W 射科e 8的壁面之間有間隙’活塞杆10連接推動虹12;注射料 官8的物料輸入口 7位於所述的支承座11的前端。 所述的活塞杆10和支承座π採用可自潤滑材料製成。 t 戶斤述的活塞杆1G表面經過碳化處理以保證潤滑防止磨損。 左射料s的物料進口位於支承座前端，物料進人注射料管後沿活 塞杆與管壁的間隙流向注射料管前部的空腔，逐漸將活塞杆推後，待 流入物料足量後，推動缸啟動，推動活塞杆前進將液態 射入模具中。 貝賈 與現有技術相比’本發明的注射料管的入料方式是後進式的，保 證了不存在㈣絲，能有效地社婦碳化。其次，活塞杆與管壁 不存在摩擦、不需要密封，—方面降低了科加工精度的要求，另一 方面消除了管壁的磨損’延長了料管個壽命，還可以免除頻繁的大 7 200924950 修，降低維護成本，提高生產效率。最後，本發明還能夠在提高 速度時保證管壁不被磨損。 、 本發明的磨損件是支承座，支承座比料管廉價得多，維修時只需 要更換支承座，大大降低了成本，節約工時。 本說明書實施例所述的内容僅僅是對發明構思的實現形式的列 .舉，本發_保護範_不應t被視為僅限於實施績陳述的具體形 .式，本發明的保護範圍也及于本領域技術人員根據本發明構思所能夠 〇想到的等同技術手段。 【圖式簡單說明】 第一圖係本發明的結構示意圖。 第二圖係第一圖的局部放大圖。 【主要元件符號說明】 減速機1 伺服電機2 螺杆料管 螺杆料管4 止逆閥5 連通管6 Ψ 物料輸入口 7 注射料管8 喷嘴9 活塞杆10 環形支承座11 推動虹In the support base u, the movable tongue 1 〇 oblique tongue base rod 10 is slidably disposed to cooperate with the __ U material; there is a gap between the wall surfaces of the piston rod W e e 8 'Piston rod 10 connection push The material input port 7 of the injection material 8 is located at the front end of the support base 11. The piston rod 10 and the support seat π are made of a self-lubricating material. t The surface of the piston rod 1G is carbonized to ensure lubrication and wear. The material inlet of the left shot s is located at the front end of the support seat, and the material flows into the cavity of the front part of the injection tube along the gap between the piston rod and the tube wall after the material is injected into the injection tube, and the piston rod is gradually pushed back, and the material is poured into a sufficient amount. The cylinder is pushed to start, pushing the piston rod forward to inject liquid into the mold. Compared with the prior art, the injection tube of the present invention is of a backward feed type, which ensures that there is no (four) filament, which can effectively carbonize the woman. Secondly, there is no friction between the piston rod and the pipe wall, no need to seal, so that the requirements of the machining accuracy are reduced, and on the other hand, the wear of the pipe wall is eliminated, the life of the pipe is prolonged, and the frequent large 7 can be eliminated. Repair, reduce maintenance costs and increase production efficiency. Finally, the invention also ensures that the tube wall is not subject to wear when increasing the speed. The wear part of the invention is a support seat, and the support seat is much cheaper than the material tube, and the support seat only needs to be replaced during maintenance, which greatly reduces the cost and saves man-hours. The content described in the embodiments of the present specification is merely an implementation form of the inventive concept. The present invention is not limited to the specific form of the performance statement, and the scope of protection of the present invention is also And equivalent technical means that one skilled in the art can conceive according to the inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a schematic view of the structure of the present invention. The second figure is a partial enlarged view of the first figure. [Main component symbol description] Reducer 1 Servo motor 2 Screw material tube Screw material tube 4 Check valve 5 Connecting tube 6 物料 Material input port 7 Injection tube 8 Nozzle 9 Piston rod 10 Ring bearing seat 11 Pushing rainbow