Current situation of extrusion technology in Germa

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Current situation of extrusion technology in Germany (II)

Medical extrusion

Dr. Collin has accumulated considerable experience in the field of multi-layer coextrusion technology. During the exhibition, he introduced the company's new technology in the pharmaceutical field: "special extrusion line for medical catheter" and "water-cooled film blowing production line"

dr. Collin's five layer film blowing production line with oscillating extraction device

specifically, "special extrusion line for medical catheter" has the following characteristics: the diameter of extruded catheter can be as small as 0 mm; The pipe wall is thin to 0 5mm; Low dimensional tolerance; The number of layers is layers; Line speed up to 100 meters per minute; Short replacement period; The production line is designed according to the dust-free standard; The central control system can directly complete the collection, recording and confirmation of relevant parameters. The whole production line includes extruder, melt pump, die, vacuum adjustment and cooling, diameter control, traction, winding, cutting, preheating system, process control system, etc. The diameter of the extruder can be 16, 20, 25, 30, 45mm, and the range of extrusion capacity is very wide ( By accurately controlling the feeding speed and temperature, the stability of product quality and the continuity of production can be guaranteed; Through the special design of the feeding device, it can be used for polymer processing of different shapes

in addition, "water cooling film blowing production line" is the latest medical multi-layer film production line (3/5/7-layer coextrusion film production line) launched by Dr. Collin company, which is used to produce large infusion bags and their secondary packaging materials

in the field of large infusion bags and their secondary packaging, PE, PP, PA and other applicable materials have gradually replaced PVC. However, the performance of single-layer polyolefin film can not completely replace PVC, so it needs 3, 5 or even 7 layers of multi-layer coextrusion system to solve this special problem. Dr. Collin's production system can be used to produce multilayer coextrusion films

when the coextrusion film thickness ranges from 170 to 300 μ M, the method of water-cooled blowing is the most effective, which can ensure higher and more accurate product quality. When several extruders of the same type feed the coextrusion die at the same time, the film bubble is guided into the water cooling ring through the die mouth, and then flattened and dried through the herringbone plate; If necessary, enter the dimension calibration procedure; Then trimming and winding

this operation method has the following advantages: in the production process, from film making to bag making, the bag is kept highly clean; Oscillating water cooling improves the transparency of PP composites; The film has balanced anisotropic properties; Suitable materials can be applied for different structural layers

twin screw extruder

leistritz company specializes in the research, development, production and marketing of plastic processing and laboratory/medical extrusion equipment, and introduced its ZSE series twin screw extruder to the Chinese market at the exhibition. ZSE model adopts combined screw and barrel structure, and the screw speed can reach 1200 rpm at most. In addition, the company also introduced the ZSE Maxx series (with the best volume and torque ratio), and the ZSE FlexX series combines the advantages of the Maxx series with the quick change system in the process

leistritz ZSE Maxx twin screw extruder adopts the latest patented technology "maxxshaft"

that is to say, it can only test one material. The latest research and development achievement of the company's extrusion technology - a new shaft element adapter called "maxxshaft" - is said to improve the performance of the extruder with optimized volume/torque ratio. Gunther rduch, executive director of leistritz, said that this patented technology has been carefully designed in terms of transmissible torque and screw groove depth, and it is conservatively estimated that the efficiency will be improved by%. ZSE Maxx and ZSE FlexX series apply this patented technology. Customers can customize this series of products according to special needs

Berstorff, another German twin-screw extrusion equipment supplier, introduced its new Ze twin-screw extrusion series at the exhibition. According to Bettina Wagner, the administrative/Marketing Manager of Berstorff company, due to the high standardization of all components in Ze series products, this series of equipment has excellent cost performance and is especially suitable for general-purpose mixing and modification purposes

Ze basic new twin-screw extruder of Berstorff company

taking Ze basic as an example, its various thread components complement each other in terms of processing performance, which is especially suitable for general-purpose blending and modification. These applications include: alloying; Enhanced modification; Filling modification; Blending of polyolefin or engineering plastics with natural fibers; Color masterbatch processing, etc. This model has six screw diameter specifications (mm), and the standard screw speeds are 600, 900 and 1200 rpm. The output rate depends on the specific purpose, mechanical size and screw speed, which is generally between, 800 kg/h. Like the construction investment application of Ze UTX series Xinjiang Zhonghe Guinea 1million ton alumina and supporting 325MW captive thermal power station project, which has been filed with the national development and Reform Commission, the Ze basic model is also equipped with a second-generation enhanced BPC control system, and its turnover is expected to reach 4billion Swiss francs (swfr) (US $397million) by 2021

extrusion blow molding hollow molding

KCC series of extrusion blow molding hollow molding machines of Kautex company, including kcc10, kcc20 and kcc30 single station equipment, and kcc10-d and kcc20-d double station machines, which can be equipped with 10 cavities at most. KCC hollow molding machine can produce plastic containers with a capacity of 5 ml to 30 L; It can be equipped with single cavity, double cavity or multi cavity parison heads for the production of single-layer, double-layer, three-layer or four layer coextrusion products; The unique feature of this series of equipment is that it can also be equipped with liquid level line device, up and down opposite blowing, fluorination treatment and other processing processes. All machines are equipped with advanced control systems that can delay the spread of fire even if it catches fire, and adopt high standards of production, so as to ensure the stable and reliable operation of the machine

kautes kcc10d double station extrusion blow molding machine

the above figure is the kcc10d blow molding machine manufactured by kautes Shunde plant. Kcc10d is a double station extrusion blow molding machine with a clamping force of 10 tons. It is equipped with hks2/50-cd125 4-cavity parison head and 4 sets of main extruders with a length of 25d. This equipment can produce round 4-layer plastic bottles with a capacity of 1000ml, which is suitable for food, medicine, beverage, cosmetics, agriculture, printing and chemical industry packaging. Produce plastic bottles with EVOH or PA barrier layer, with anti oxygen, anti steam and other properties. At the exhibition, the company demonstrated on site the production of 1 liter bottles weighing g, with a production rate of 720 bottles/hour

foaming board extrusion

PS is the most commonly used material for foaming board production, and the rest include polyolefins (such as LDPE), pet and PVC. Foamed board has good mechanical properties and insulation, and is widely used in insulation, food packaging, fragile goods packaging, buffer parts, outdoor poster boards and other fields. CFCs were generally used as foaming agent more than 10 years ago, but now the most commonly used ones are butane, pentane or CO2; Or add additives during plate extrusion

generally, there are three basic processes for the production of foam board, including adding chemical foaming agent and injecting foaming agent in the form of gas on the single extruder/front and rear double extruders. Gneuss company specializes in producing the melt filtration system required for the molding of this kind of foam board process to remove soft and hard particles; Keep the pressure uniform to ensure that the honeycomb structure of the foam board is uniform; Avoid foaming of the melt during the exchange process; And prevent gas leakage during extrusion

gneuss automatic filtration system sfxmagnus

according to Andrew prangnell of gneuss company, the main reason for the success of its melt filtration system in the field of foam board is that the process and pressure are stable during operation, resulting in stable and consistent products. He said that his filtration system has a high level of automation, and there is no problem even using recycled materials with high impurity content. He said that the advantages of the system lie in its economy and safety: "gas blowing agents are often used in plastic foaming, and our products can effectively prevent gas leakage; under fully controlled conditions, an appropriate amount of gas is injected evenly."

gneuss' filtration system models include RSFgenius, sfxmagnus, SF and KSF. Andrew pranglel suggested that the plastic machine manufacturer should choose the appropriate model according to the required functions of the product; All filters of the company have basically been able to produce stable foaming products, reduce thickness tolerance to reduce waste, avoid the impact of the replacement process, use more recycled materials and complete the replacement process more safely

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