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We are the expert on the double screw extrusion with double strapping band extruded here in China. With the usage of recycled materials the system can provide solution to low cost production with high efficiency and better quality. Please contact us if you need video clips for your further reference of the production line by sending email to zjaska@vip.163.com
Pet Band Production Line
Specification of Pet Line 1. Introduction of Contract Pet Line The Pet band is fibre band of high density and made from the main material of Polyethylene Terephthalate (PET) through extrusion and fine processing. It is a type of strapping band of environment protection 2. The characteristics of its technology: material automatically loaded with drier> pre-crystalline drying > extruded by Double-screw Vent- Type extruder > One mould cavity has double de-mould products which are equipped device producing five specifications width’s products between 9.5mm and 32mm > flow casting equipped with a set of chilled water system > first pre heating adopted with five roller’s heating system > first pulling with five rollers stretched through chilled water > second preheating controlled by hot oil controller.> second pulling with five rollers stretched through chilled water > pattern pressing with patterned roller, sizing roller, pulling roller, and is connected through chilled water to accelerate chilled fixing process.> heat fixing with the fixing drying oven having length of 3.5 meters, warm-air heating recycling system having length of 2.5 meters with a temperature range of 180~235 degrees.>winding equipped with triple working spot winder system 3. Digital display system is adopted for better and precise controlling Through the processes of flow casting ,pulling tension ,fixing ,embossing, advanced electrical controller of the revolving coder and PLC controller, human-computer interface, etc are adopted to realize the digital display of linear velocity , automatic control of tensile stress, simultaneous accelerating ，and fine adjustment of linear velocity , tension and other technical data of single roller as well as all the rollers 4. Equipments of the Contract Pet Line (1) Automatic loader equipped with drier 1 set (2) Double-screw Vent- Type extruder 1 set 2-1:screw hardness, HV1400,with air escape ,temperature control +/–1 degree，screw caliper φ60.which is processed with 38CrMoAl, and refined through the processes of gas type nitrogenating, polishing with a 0.4—0.7mm thickness layer of nitrogenizing. And the surface hardness >1400HV, strength is kept under high temperature. The cartridge is made from 38 CrMoAl，which is refined with process of gas-type nitrogenizing， polishing，finishing，surface boring and the hardness >1400HV，with better strength and non-polishing and ablation resistance is good. 2-2:gear case :used with hard gear-surface reduction gear box which has a transmission of better finesses and has a less noise, with longer life of usage 2-3:Driving motor: use by a high quality Fuji governor with electric power of 45kw (3).Double working spot’s net-changing set 1 SET (4).Plastic extruder’s flat die head 2 sets Used with high quality alloy. It is processed through refining, grinding, polishing .the die head itself is coated with hard Cr and adjusted in a high fineness way. One mould cavity has double demould products which are equipped device producing five specifications width’s products between 9.5mm and 32mm. (5) Flow casting set 1 set with a chill-roll’s diameter of 750*280,and separation roller is φ300*280mm.linear velocity is v=5--9meters/centimeter, motor driving power is 1.5kw. The chassis moved by manual lifting and equipped with a set of chilled water system.. (6)．The first heating device 1 set 6-1,Adopted with five roller’s heating system, five rollers are φ240*280mm, The hot oil in inside bladder has a temperature of 75--120 degrees , the oil temperature is controlled by hot oil controller. Motor driving power is 2.2 KW 6-2, Assisted with device of infrared ray’s heating . (7)．The first tension set 1 set Five rollers are stretched through chilled water and the diameter is φ270*280mm. the driving motor power is 7.5KW. (8)． The second heating device 1 set 8-1,Adopted with five roller’s heating system, five rollers are φ240*280mm, The hot oil in inside bladder has a temperature of 75--120 degrees , the oil temperature is controlled by hot oil controller. Motor driving power is 2.2 KW 8-2, Assisted with device of infrared ray’s heating .
(9 ). The second tension 1 set Five rollers are stretched through chilled water ,roller diameter is φ270*280mm. Motor driving power is 7.5 KW. (10)Fixing drying oven 1 set the fixing drying oven has length of 3.5 meters, warm-air heating recycling system has a length of 2.5 meters with a temperature range of 180~235 degrees. (11)．The pulling embossing device 1 set The five-rollers has size of φ230*150mm ,with patterned roller, sizing roller, pulling roller, and is connected through chilled water to accelerate chilled fixing process. (12.)The triple working spot winder system 1set (13) The speed regulation by frequency variation is adopted , and Schuyder’s low voltage appliances are also used. Through the processes of flow casting ,pulling tension ,fixing ,embossing, advanced electrical controller of the revolving coder and PLC controller, human-computer interface, etc are adopted to realize the digital display of linear velocity , automatic control of tensile stress, simultaneous accelerating ，and fine adjustment of linear velocity , tension and other technical data of single roller as well as all the rollers. 5. Specification of the strapping band Width/thickness (mm)
5. Material: According to the requirements of the strength of product ,all the raw material can be used with the bottle slices. 6. Output: 85 kg/per hour 7.Electric power installed: 200 KW 8.Power consumption: 60—120KW/per hour 9.Gross weight: 12 tons 10.Space needed for installing of the Line: Length=36 m Width=3.5m Height=3.8m
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