The wide application of thermoforming technology i

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The wide application of thermoforming technology in packaging machinery

thermoforming has gradually become a widely accepted technology. The continuous improvement of processing equipment and materials provides more new uses for thermoforming. With the integration of molding and cutting, Italian AMUT company recently developed a thermoforming machine for hard food packaging. This production system (membrane coextrusion and composite thermoforming) is dedicated to the production of polypropylene (PP) cups (single-layer transparent or three-layer opaque, with recycled materials as the inner core), with a production capacity of about 60000 pieces/hour (calculated based on the capacity of 200 cubic centimeters/cup). In addition, it can also produce all kinds of PP cans and bowls (round or square dairy containers, with a depth of 120 mm, and neat edges, suitable for automatic packaging processes). The equipment can also process hips, CRPS, and even pet, but the raw material dehumidification system needs to be set at the feed inlet of the extrusion section Viewed from the outside, the equipment is a set of independent working system, mainly including: raw material feeding and weighing feeding system. The extrusion section includes:

AMUT single screw main extruder, ea100 series, equipped with 35:1 length/diameter ratio plasticizing system, equipped with oil-driven two-way exchanger, gear pump and static mixer; AMUT single screw coextrusion machine, ea48 series, equipped with 33:1 length/diameter ratio plasticizing system, equipped with exchanger; Three layer coextrusion flow box with interchangeable distributor; Horizontal flat die head with internal melt adjusting rod, with a maximum effective width of 900 mm; The vertical three roll calender and lead-out device, with a nominal width of 1000mm, are used for calendering and extruding the diaphragm, and are equipped with an independent temperature regulating device; The speed of each calender roll and traction speed are controlled independently and managed by the diaphragm transmission system in the thermoforming system at the same time. The diaphragm is introduced into the temperature control heating plate through the chain rail, and the chain rail (width adjustment and cooling) is controlled by the brushless motor. The thermoforming section includes: equipped with in mold synchronous forming and cutting devices, and adopting the lower formwork tilting technology, so as to reasonably and quickly stack the final products during the production of multi-mode cavity; The effective forming/cutting area is 780 × 740 mm. When PP is used, it reaches about 22 ~ 23 cycles per minute, and when PS is used, it reaches 27 ~ 28 cycles; The tilting process of the lever system is controlled by cams fixed on four rigid columns; The whole system has a solid structure to ensure absolute accuracy and no vibration during the working cycle; The final plug-in movement is electrically controlled

the pneumatic stacking and ejection device ejects the thermoformed products through an independent chute, and then the thermoformed parts are transferred by the conveyor belt to the next processing stage, namely: edge forming (plastic cup), offset printing and packaging (the stacking machine is configured according to the mold cavity structure)

the diaphragm frame grinding device is installed behind the thermoforming machine; Configure the relevant conveying system to convey the recycled sheet blank to the extrusion system

the equipment can also be equipped with AMUT's new edge forming machine, which is specially designed for PP products, equipped with temperature regulating screws and automatic packaging machine. The electronic control system (PLC) of the whole production line is centralized in the main distribution box and connected with two sets of central operation consoles. Among them, one set is equipped on the calendering frame of the extrusion section, and the other set is assembled on the thermoforming machine. The advantages of extrusion and composite thermoforming system are: when producing lighter products, the output rate is high, and the extruded sheet can be thermoformed quickly and evenly, creating the best conditions for the subsequent forming process. Energy saving, because there is no need to curl the sheet after cooling, and there is no need to reheat the sheet before the hot forming process. The operation process is simple, convenient for process monitoring and low labor cost (in the production process, only one operator is needed for the whole production line). The use of thin sheets can ensure the best quality of thermoformed products. Recycle leftover materials to avoid contamination by uneven materials. Reduce the overall size of the entire production equipment in the plant. Making food packaging meico company of Italy has launched FC 780 E and FC 600 e new thermoforming machines. The machine is manufactured by its Swiss sister company WM wrapping machine. This forming/cutting/stacking/(vacuum and pressure) thermoforming machine is driven by a motor (servo motor)

the molding areas of FC 780 E and FC 600 e models are 780 respectively × 570 mm and 640 × 450mm, suitable for small to medium batch production, but also meet the requirements of flexibility and rapid die replacement

the clamping force and cutting force of FC 780 e model are 20 tons and 60 tons respectively; The clamping force and cutting force of FC 600E model are 15 tons and 50 tons respectively

the two models (including standard models) contain various functional features, and can process various rolled thermoformed sheets with a maximum thickness of 2 mm, including hips, GPPS, pet, PVC, PP, OPS and EPS

two independent heating boxes, one above and one below, equipped with proportional heating zone; The forming section and cutting section are equipped with upper and lower independent dynamic pressing plates; The stacking device can also be equipped with counting, ejection and leftover curling equipment

fc 780 E and FC 600 e models also have the following advantages: the mechanical cycle speed is fast, and when 350 micron sheets are used to make a-pet pallets, the speed is up to 40 times/min; Low noise; Low energy consumption; It can be set quickly, because it adopts special mechanical design and special program of single board computer, which is convenient for mold replacement. Single station and multi station the plastic Department of QS group in Italy designs and manufactures various thermoforming machines, and provides single station and multi station models. Its multi position machine is specially designed for the refrigeration industry. It is used for thermoforming lining and inner door, which can improve the production speed. In order to meet the needs of customers, the company has designed two sheet transfer systems: chain transfer thermoforming line and clamping transfer thermoforming line

for single station models, the company produces thermoforming machines of various specifications, which are used in health, automotive, electrical appliances, packaging and other industries. The equipment can be equipped with different heating systems, from traditional commonly used ceramic heating tubes to quartz heating tubes or halogen heating tubes, to meet the processing needs of different products. It can also be equipped with various auxiliary equipment, including automatic sheet loading equipment and automatic thermoforming part unloading equipment, with more perfect functions

in addition to the plastic sheet thermoforming single station model, the company's Plastic Department also designs and manufactures roller feeding thermoforming machines and single station models for the automotive industry, which are used for the lamination of automotive interior parts. All electric thermoforming machine RTM company recently developed a fully electric thermoforming machine - Milano Eng. This series of models implement full-automatic continuous cycle production, which is suitable for processing plastic foil. The thickness includes the thickness commonly seen in the market; For hips and similar materials, the thickness is 0.2mm ~ 2mm; When PP material is used, the thickness is 0.3mm ~ 1.8mm

the working speed of the equipment is 6 Double dragon bone front suspension: the front suspension of polar 1 with a double keel is extremely fast, which is related to factors such as plastic type, thickness, shape and depth of molded parts. This model is especially suitable for the production of food packaging, containers, egg saucers, blisters, household refrigerator doors and other outstanding technology leading products. Standard machine components include: chute for plastic feeding, which is set in chain conveyor; Chain conveyor driven by servo motor; Heating station, the whole forming length is divided into three steps; Molding station

the heating station adopts the most advanced technology and two Rigo patents, one of which is an energy-saving patent (can save 25% energy on the original basis), and the other relates to the heating plate half open technology, which can be rdquo; Dr. bor Jang, CEO and founder of angstron materials, said that the opening and closing of four and a half heating plates were pre adjusted

four types of heating stations can be provided according to customer requirements: single vacuum type, low clamping force; Vacuum and air pressure type, medium clamping force; Vacuum and air pressure type, through the steel roller die head to achieve peripheral cutting in place, can set a high clamping force; And weight chain conveyor

rtm plans to use roll plastic instead of sheet plastic as production material. Then why is it recommended to adopt packaging machinery technology in the production of "refrigerator door"? The reason is very simple: the maximum speed that can be achieved by using industrial machinery is 180 cycles/hour, that is, 20 seconds/cycle, of which 12 seconds is an invalid cycle and 8 seconds is a molding process. For the packaging machine, due to the use of vacuum plus air pressure, the invalid cycle time is only 2 seconds, and the molding time is shortened to 6 seconds. As the heating temperature is reduced by 10 ℃, the thickness of plastic can also be reduced

source: Chinese Electromechanical Enterprises

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