English
A single screw blown film equipment for producing pure PA6 film, and a practical invention of a pure PA6 single-layer film blown film equipment. Adopting a single screw extruder. Blow down method, producing pure PA6 film for aviation equipment and military materials. In the fields of medicine and food, it has a super barrier effect, filling the gap in the pure PA6 blown film method. Replaced the conventional multi-layer co extrusion blown film method. Due to the use of multi-layer co extrusion in conventional blown film methods, whether blowing upwards or downwards, PA6 has excellent flowability and is difficult to form mold blanks. It needs to be co extruded with other raw materials for composite molding, and cannot be blown with a single PA6 material. PA6 has super high moisture absorption, which can cause wrinkles and moisture absorption of the material when exposed to water or excessive humidity in the air. Therefore, this device has been tested multiple times based on actual conditions. In the end, a single air cooling method was adopted, without water ring and water cooling. Solved this difficulty and replaced the high priced equipment monopolized by Europe and America. Has high cost-effectiveness.
The application of PA6 in daily products. Asia Pacific International Polyamide Fiberglass Reinforced Materials have good dimensional stability and low warpage, solderability and baking paint properties, easy spraying, ultrasonic welding, good material glossiness, and can be dyed into various bright colors. They have the following advantages:
The combination of strength and durability, excellent rigidity and heat resistance
Good processability, excellent flowability, and thermal stability make material processing conditions more relaxed, resulting in miniaturization of injection molded parts
Extremely high thermal stability, able to withstand wave soldering up to 270 degrees without tin hanging
Constant electrical performance over a wide range of temperatures and frequencies ensures 100% safety in the use of equipment.
The application of PA6 in the automotive industry for interior and exterior components.
High performance reinforced polyamide composite materials for automobiles have excellent weather resistance, good paint performance, and outstanding performance effects, with the following advantages:
High heat resistance, long-term use;
Excellent combination of rigidity and toughness;
Capable of withstanding significant strain under strong temperature and humidity fluctuations;
Excellent dimensional stability and anti warping effect;
Has high surface quality and a smooth surface.
The device is as follows:
The S1 rack is welded and assembled from a steel structure, equipped with corridors, platforms, stairs, and an extruder, screen changer, rotator, and mold placed on the upper side. Cooling air ring, cooling air cover.
The S2 extruder is equipped with a drive motor, reducer, hopper, screw, heater, and screen changer,
S3 rotator, equipped with a rotating gear plate, a rotating wind ring, a rotating motor, and a rotating body. Heater.
S4 mold - central spiral structure, equipped with feed inlet and spiral diversion section. Discharge outlet. Standardized segment. Heater. Air intake,
S5 cooling air ring. Internal labyrinth negative pressure air duct. The air is evenly distributed. According to the size of the membrane bubbles. Free adjustment of air outlet clearance to change air pressure and flow rate
S6 cooling hood. It has a double-layer honeycomb structure. Distribute the air flow from the outlet of the air ring evenly to the surface of the membrane bubble. Improve cooling speed and stability
Place the traction part perpendicular to the center of the mold below the S7 rack. The traction part is equipped with a herringbone board, traction device, clamp, and drive motor
S8 pulls the winding equipment in the X direction. The winding equipment has a central winding structure and AB dual station with flipping function. Automatic switching. Automatic cutting.
S9 constant temperature cold air equipment, equipped with a condenser. Ensure that the temperature of the cooling air in the air ring remains stable throughout the year. Not affected by seasonal climate and environmental factors.
The S10 electrical control cabinet is equipped with a frequency converter. Electrical components. PLC module. Manual interface touch screen.
The overall device operation of S11 is convenient. High degree of intelligent automation.
Equipment process flow:
Firstly, the PA6 raw material and processing aids are evenly mixed and then 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 into the mold through the air inlet. Close the mold base end. Cooling forms film bubbles. The larger the intake volume, the larger the membrane bubble. Conversely, the less.
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 cooling air ring and cooling air cover vertically from top to bottom.
The external air enters the air ring after being cooled by the condenser at a constant temperature. Uniformly distributed by internal structure. Cooling of film bubble shaping.
The cooling hood performs two rounds of shaping cooling on the film bubbles, and the inlet air is supplied by the main fan. The air outlet is equipped with honeycomb holes, which are evenly dispersed on the surface of the film bubbles to improve the cooling speed.
Traction device. The angle of the herringbone board flattens the circular film bubble to form a flat thin 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 material enters the auxiliary traction. Real time online monitoring and closed-loop control by tension sensors, driving the motor to ensure synchronous traction speed with the upstream production line.
The material is rolled into the A-axis winding operation. After reaching the set distance. The B-axis starts running ahead of schedule. The flipping mechanism begins to operate. After reaching the position, the cutting device starts working. Automatically return after cutting is completed. Count reset to zero. The A-axis stops running. The B-axis starts calculating new roll diameter values. Wait until the next cycle when the roll is changed. B repeats A's action. Switch AB alternately in sequence.
