實驗室PP阻燃通風管道注塑工藝及制作配比方法

Injection molding technology and production ratio of PP Flame Retardant ventilation pipe in laboratory

實驗室PP阻燃通風管道材應水平堆放在平整的地上，應避免彎曲管材，堆置高度不得超過1.5m，管件應逐層碼堆，不宜疊得過高。實驗室PP阻燃通風管道管材和管件應放在通風******的庫房或簡易棚內，不得露天存放，防止陽光直射，注意防火安全，距離熱源不得小于1m。搬運管材和管件時，應小心輕放，避免油污，嚴禁劇烈撞擊，嚴禁與尖銳物品碰觸和拋、摔、滾、拖。

PP flame-retardant ventilation pipe materials in the laboratory shall be stacked horizontally on the flat ground, bending pipes shall be avoided, and the stacking height shall not exceed 1.5m. Pipe fittings shall be stacked layer by layer, not too high. PP Flame Retardant ventilation pipes and pipe fittings in the laboratory shall be placed in a well ventilated warehouse or simple shed, and shall not be stored in the open air, to prevent direct sunlight, pay attention to fire safety, and shall not be less than 1 m away from the heat source. When handling pipes and pipe fittings, handle them with care to avoid oil contamination, and avoid violent impact. It is strictly prohibited to touch sharp objects and throw, fall, roll and drag them.

實驗室PP阻燃通風管道是一種采用先進配方，以聚丙烯樹脂為主要原料，加入適量的玻璃纖維絲和改性助劑，用******的成型工藝裝置連續擠塑成型，內壁光滑，強度高，外壁采用工字鋼原理帶有垂直的加強筋的新型管材。適合軟土質地區，廣泛應用于市政工程雨水，污水排放；工業廢水排放，小區排水工程；鹽業輸鹵，漁業輸水；礦井通風，排水工程；農林排灌，水利工程等。實驗室PP阻燃通風管道材料新，產品結構合理，強度高，耐腐蝕；內壁光滑，流通量***，同流量使用口徑小，不易結垢；重量輕，搬運安裝方便，排管不需要做混凝土基礎，施工快。實驗室PP阻燃通風管道擴口承插連接“T型”橡膠圈密封，使管材的滲漏量達到了***，且擴口長度長，施工過程中不易脫落，保證了工程質量；注塑成型是利用熱塑性塑料的熱物理性質和加熱可熔融，冷卻又凝固的可逆性質，通過料斗把物料(通常為粒料)加入到外有加熱、內裝螺桿的料筒之內，物料在螺桿旋轉作用下沿著螺槽輸送并壓實，同時在螺桿的剪切力和外傳導熱的作用下，塑化成為了均勻的熔體，聚集在螺桿頭部，完成塑化階段；然后，在螺桿的高壓、高速推擠下，將熔體從噴嘴經過流道，注入到有冷卻設施的模具型腔之內；再經過其一定的壓力保持，完成注射階段，***后經過冷卻定型的階段，便可以開啟模具將制品***下。注塑是成型實驗室PP阻燃通風管道件***主要的方法。

PP Flame Retardant ventilation pipe in the laboratory is a new type of pipe with advanced formula, polypropylene resin as the main raw material, proper amount of fiberglass and modified additives, continuous extrusion molding with unique molding process device, smooth inner wall, high strength, and I-steel principle with vertical stiffeners on the outer wall. Suitable for soft soil area, widely used in municipal engineering rainwater, sewage discharge, industrial wastewater discharge, community drainage engineering, salt industry brine transportation, fishery water transportation, mine ventilation, drainage engineering, agriculture and forestry drainage, water conservancy engineering, etc. The PP flame-retardant ventilation pipe material of the laboratory is new, the product structure is reasonable, the strength is high, corrosion-resistant; the inner wall is smooth, the flow volume is large, the same flow use diameter is small, not easy to scale; the weight is light, the handling and installation is convenient, the discharge pipe does not need to be made of concrete foundation, and the construction is fast. Laboratory PP flame-retardant ventilation pipe is sealed with "t" type rubber ring by flared socket connection, so that the leakage of pipe material reaches the minimum, and the flared length is long, which is not easy to fall off in the construction process, ensuring the engineering quality; injection molding is to use the thermophysical properties of thermoplastic plastics and the reversible properties of heating, melting, cooling and solidification, and to add materials (usually granular materials) to the outside through hopper In the barrel with heating and internal screw, the material is transported and compacted along the screw groove under the action of screw rotation. At the same time, under the action of screw shear force and external heat conduction, the plastic melt becomes uniform and gathers at the screw head to complete the plastic stage. Then, under the high-pressure and high-speed extrusion of screw, the melt is injected into the mold with cooling facilities from the nozzle through the flow channel In the mold cavity, after a certain pressure is maintained, the injection stage is completed, and finally the cooling and finalization stage is passed, then the mold can be opened to push the product down. Injection molding is the most important method of molding PP flame-retardant ventilation pipe in laboratory.

可成型實驗室PP阻燃通風管道件或組成管件的部件包括熱熔管件(對接、承插、鞍形)或長插口管件彎頭，等徑三通，異徑三通，異徑，法蘭端頭，端帽，鞍形管件。短接管件的中心部件彎頭，等徑三通，異徑三通，異徑，端帽，法蘭端、塑料壓縮型管件的塑料部件、電熔管件、閥門配件、管夾。注塑機的分類方法有多種，如按合模機構型式分，可分為液壓式、液壓機械式和電動機械式。注塑機主要由注射部件、合模部件、液壓系統、機身、加熱和冷卻系統、電器控制系統以及加料裝置等組成。與實驗室PP阻燃通風管道件注塑質量和工藝直接相關的部分，是注塑部件中的塑化裝置

The components of the molding laboratory PP flame-retardant ventilation pipe fittings or the components of the pipe fittings include hot-melt pipe fittings (butt joint, socket, saddle shaped) or long socket pipe fittings elbow, equal diameter tee, reducing tee, reducing, flange end, end cap, saddle shaped pipe fittings. Elbow, equal diameter tee, reducing tee, reducing, end cap, flange end, plastic parts of plastic compression type pipe fittings, electric fusion pipe fittings, valve fittings and pipe clamps of short-circuit pipe fittings. There are many kinds of classification methods of injection molding machine, such as according to the type of clamping mechanism, it can be divided into hydraulic, hydraulic mechanical and electric mechanical. Injection molding machine is mainly composed of injection parts, mold closing parts, hydraulic system, fuselage, heating and cooling system, electrical control system and feeding device. The part directly related to the injection quality and process of PP flame-retardant ventilation pipe in the laboratory is the plasticizing device in the injection parts