English
A device for producing optical material FEP film. This practical invention is for producing FEP film. PI film blowing equipment. Can be used for medical equipment. Aviation equipment. Semiconductor integrated circuit flexible board and other fields.
FEP is a copolymer of tetrafluoroethylene and hexafluoropropylene, with a hexafluoropropylene content of about 15%. It is a modified material of polytetrafluoroethylene. Full name: Fluorinated ethylene propylene copolymer (perfluoroethylene propylene copolymer), abbreviated as perfluoroethylene propylene, also known as F46.
FEP has a melting point of 580 ° F and a density of 2.15g/CC (grams per cubic centimeter). It is a soft plastic with lower tensile strength, wear resistance, and creep resistance than many engineering plastics. It is chemically inert and has a low dielectric constant of approximately 2.1 over a wide range of temperatures and frequencies. This material does not ignite and can prevent the spread of flames. It has excellent weather resistance, low friction coefficient, and can be used from low temperature to 392 ° F. This material can be made into granular products for extrusion and molding, used as powder for fluidized bed and electrostatic coating, and can also be made into aqueous dispersions. Semi finished products include film and board. Stick and single fiber.
The application scope of FEP is the same as PTFE, and it is used in the electrical, wireless, electronic, chemical, mechanical manufacturing, refrigeration, pharmaceutical, and other industrial sectors.
FEP is used for thin film printed boards, wire and cable insulation, generator wire windings, electrical insulation components (sheets, rods, tubes, frames, and insulators), corrosion-resistant structural products (oil-free mechanical components), coatings, and glass tarpaulins. Excellent corrosion resistance makes it applicable to chemical work equipment, heat exchangers, fractionation towers, pumps, valves, pipes, seals, pipe linings, laboratory transparent vessels, etc.
FEP is used for insulation of wires and cables for various purposes, especially for wires and micro electronic components in electronic assembly circuits.
FEP film is used as a seal for capacitors, separators, and chemical equipment, and is used in the printing industry to produce printed boards and flexible cables.
Thin films can be welded, vacuum formed, coated with metal, and do not require surface activation. They can bond with metal and glass cloth under heating and pressure.
FEP film has particularly high gas permeability resistance and is therefore used as a sensitive component in gas analyzers to isolate the analyzed gas from the membrane.
Due to the characteristics of the raw materials, all equipment capable of producing thin films using blown film method has been acquired by Japan. Italy. Monopoly in Taiwan. There is no such device available domestically. This practical invention device has the ability to break the technological monopoly. The advantage of ultra-high cost-effectiveness.
The advantages are as follows:
Mold. nose. Network changer. Using special high-temperature resistant steel (Hastelloy CH-113)
The screw and barrel are made of GH4169 and CV276 alloy materials.
Adopting the blowing and film blowing process. The mold head rotates. Improve the flatness of the film
The mold adopts IBC internal circulation. Realize synchronous operation of machine head rotation and internal cooling circulation of membrane bubbles. Improve the cooling and forming speed of thin films. Eliminate the odor of high-temperature air inside the membrane bubble. Improve the transparency of the film.
Adopting a human-machine interface. Intelligent automation control. Easy to operate. Remote monitoring and maintenance.
The equipment structure is as follows:
S1. Extruder. Equipped with a gearbox. Drive the motor motor. Hopper. Suction machine. Screw. Material cylinder. Heating coil. Cooling fan. Cover shell.
S2. Head part. Equipped with a screen changer. Rotating body. Rotating wind ring. Mold. Internal circulation device. Cooling air ring.
S3. Stable foam holder position. Equipped with a driving motor. Guiding stick. Bracket. Framework. Ultrasonic testing device.
S4. The herringbone board section. Equipped with Teflon carbon fiber guide rollers. Adjustment device. Support frame.
S5. Traction area. Equipped with a driving motor. Rubber roller. steel rod. Cylinder. Traction bracket.
S5. Edge correction machine parts. Equipped with servo motors. Edge correction drive device. Detecting devices. Guide roller.
S6. Rolling area. Equipped with a traction drive motor. Stick. Cylinder. Tension monitoring device. Winder motor. Friction rubber roller. Flip the knife holder. Cutting device. Mechanical arm grasping device. Material receiving device. Unloading device. Inflatable axis. Electrical control components,
S7. Cooling device. There are three wind turbines installed respectively. 1 unit with internal air intake. 1 unit with internal air outlet. One outdoor air inlet.
S8. The rack is assembled by welding steel structural profiles. There is a platform available. stairs. Install a stable foam rack in the corresponding position. Herringbone board, traction device. Edge correction machine.
technological process
The raw materials are fed into the hopper by the suction machine.
The main motor drives the reducer to rotate the screw.
After heating, the barrel transfers heat to the screw. After the screw rotates, the solid material particles are plasticized into a solution.
The raw materials are filtered through the filter plate of the screen changer to remove impurities. Entering the rotating machine head, the internal flow channels of the mold are distributed. Form a circular mold base.
Inject air from the internal air intake fan. Close the mold base end. Cooling forms film bubbles. The larger the intake volume, the larger the membrane bubble. Conversely, the less.
The stronger the internal air flow. The smaller the swelling of the membrane bubble. On the contrary, the larger it is.
After the external air enters the wind ring. Uniformly distributed by internal structure. Cooling for shaping film bubbles,
There are three ultrasonic sensors installed on the lower side of the stable bubble holder. Real time monitoring of membrane bubble size. Controlled by PLC module PID closed-loop inverter analog quantity. So as to control the fan speed and air volume. Realize the loop following control of internal air intake and internal air exhaust. Eliminate the high temperature heat inside the membrane bubble. External cold air enters the membrane bubble. Alternating cold and hot output. Thus solving the problem of high temperature cooling and shaping drawbacks of FEP materials.
The rotating machine head is equipped with a rotating motor motor. Rotating wind ring. 360 degree operation can improve the flatness and bursting phenomenon of the film after molding.
After the film bubble is formed, it enters the traction device vertically from bottom to top. It needs to be fixed by a stable bubble holder, and the angle of the herringbone plate will flatten the circular film bubble to form a flat film. According to the diameter of the membrane bubble. Adjust the angle between the opening and closing range of the stable foam rack and the herringbone board.
The traction device is equipped. Clamp, drive motor, reducer. Cylinder. After the membrane bubble enters the clamp. Form a planar two-layer thin film. The traction speed is fast. The thickness of the film is reduced by stretching. Conversely, the thickness of the film increases.
There is an edge correction machine installed on the rack. Used to correct the left and right offset position of the film edge. Due to the shaking of the film in actual production. Avoid uneven edges after winding into rolls of material.
After the film enters the winding process. Real time monitoring and control of online forces can be achieved. Reached the set number of meters. The knife holder automatically flips and cuts. Automatic unloading. The robotic arm automatically grasps the inflation shaft. Replace manual operation. Reduce labor force. An auxiliary traction has been added to the winding area. Can avoid high film pulling resistance. And in case of cutting faults. The loose film caused by traction. The loss of raw materials caused by shutdown operations and the drawbacks of manual operations.
