A kind of recycling glass fiber reinforced plastic melt granulation extrusion equipment and its extrusion method

Abstract

The invention discloses extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic. According to the technical scheme, the extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic comprises a double-screw extruder and a single-screw extruder which are connected in sequence; the double-screw extruder comprises a first-order cylinder with a heating function, a first-order feeding port used for feeding is formed in the front portion of the first-order cylinder, a filter screen is arranged on the rear portion of the first-order cylinder and used for filtering fused polymers, and a mixing unit is further arranged in the position, close to the filter screen, of the interior of the first-order cylinder; and the single-screw extruder comprises a second-order cylinder with a heating function, a second-order feeding port is formed in the front portion of the second-order cylinder and used for collecting short glass fibers and the polymers filtered by the filter screen, an extruder head is arranged on the rear portion of the second-order cylinder, and an ultrasonic vibration mechanism used for promoting the glass fibers and the polymers to be mixed is arranged on the extruder head. According to the extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic, the cut short glass fibers are effectively protected, and the physical index of products is effectively increased.

Description

【Technical field】 [0001] The invention relates to a recycling glass fiber reinforced plastic melting granulation extrusion equipment and an extrusion method using the same. 【Background technique】 [0002] At present, the application of polymers is becoming more and more widespread, ranging from daily necessities to automobiles. With the increase of social awareness of environmental protection, the problem of how to recycle waste plastics and leftovers arises. Simple mixing and granulation, Not only the performance of plastics is poor, but the scope of application is also very limited, and the economic benefits are not good. More professional modified plastics companies carry out deep processing through twin-screw extruders, adding glass fiber to reinforce the strength of plastics, so that the application of plastic modified materials It has been greatly improved, such as medical rehabilitation equipment, electrical appliances, furniture, switches and other fields can be appl...

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Problems solved by technology

[0002] At present, the application of polymers is becoming more and more widespread, ranging from daily necessities to automobiles. With the increase of social awareness of environmental protection, the problem of how to recycle waste plastics and leftovers arises. Simple mixing and granulation, Not only the performance of plastics is poor, but the scope of application is also very limited, and the economic benefits are not good. More professional modified plastics companies carry out deep processing through twin-screw extruders, adding glass fiber to reinforce the strength of plastics, so that the application of plastic modified materials It has been greatly improved, such as medical rehabilitation equipment, electrical appliances, furniture, switches and other fields can be applied, making contributions to social environmental protection and saving the production cost of enterprises

[0003] Recycling economy is an industry encouraged by the state. As an important branch, the recycling of waste plastics and their leftovers has a very broad prospect. Although the existing twin-screw extrusion process can meet the needs of recycling, But there is still room for improvement. First, the glass fiber of the twin-screw extruded glass fiber reinforced plastic is added in the twin-screw extruder. The mixing of the twin-screw extrusion disperses and mixes the glass fiber and also breaks the glass fiber. Fiber, which affects the effective length of glass fiber (should be greater than 0.3mm), affects the physical properties of glass fiber reinforced plastics. Secondly, there are miscellaneous materials in waste plastics. A filter screen needs to be added at the head of the screw to remove miscellaneous materials. While removing miscellaneous materials, the glass fiber is also clogged on the filter screen, which affects the passage of materials, thereby shortening the time for replacing the filter screen. Due to the clogging, the glass fiber is excessively sheared, and the glass fiber breakage is even more serious. , which reduces the physical properties of modified plastics, affects production, and increases the labor intensity of workers

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