PC devolatilization system

Abstract

The utility model relates to a PC devolatilization system, which is characterized in that the top of a heating box is provided with a feeding hole, the bottom of the heating box is provided with a discharge hole, the heating box is in a transverse barrel shape, a heating assembly is arranged in the side wall of the heating box, a motor is arranged on the heating box, the output end of the motor is connected with a rotating shaft, and the rotating shaft is inserted into the heating box and is connected with a scraping rod; the scraping rod abuts against the inner surface of the side wall of the heating box. Pneumatic vibrators are arranged at the two ends of the heating box; in the later discharging process, the output end of the motor drives the rotating shaft to rotate, the scraping rod is driven to revolve around the rotating shaft and scrape the inner wall of the heating box, so that polycarbonate adhered to the inner surface of the side wall of the heating box is scraped to the discharging opening, and meanwhile, through the vibration effect of the pneumatic vibrator, the polycarbonate can be discharged out of the discharging opening. The polycarbonate adhered to the inner surfaces of the two ends of the heating box is gradually vibrated, falls off and is discharged to the discharging opening, so that the situation that a large amount of materials are lost is avoided, the structure is simple and reliable, and the falling effect of the polycarbonate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of polycarbonate production, especially a PC devolatilization system. BACKGROUND

[0002] Polycarbonate, English name polycarbonate, is a kind of thermoplastic engineering plastics with excellent comprehensive performance, and can be divided into aliphatic, aromatic, aliphatic-aromatic and other types according to the structure of ester group. Because polycarbonate main chain has bisphenol A group, it has outstanding impact resistance, good creep resistance and dimensional stability, and has high heat resistance and cold resistance, can be used in-100 ℃ to 140 ℃ temperature range, excellent electrical performance, low water absorption, good light transmission performance, in addition, carbamate group can rotate freely, polycarbonate has good softness and toughness.

[0003] Polycarbonate needs to be devolatilized in the production and processing process. The Chinese invention patent with publication number CN117046132A discloses a condensation devolatilization system for polycarbonate production, which records the process of three-stage devolatilization of polycarbonate, wherein two groups of protective sleeves are driven by driving mechanism to move in synchronous reverse staggered displacement, accelerate the polycarbonate located between the two to separate, make the polycarbonate adhered between the adjacent two protective sleeves and the protective sleeve and the heating box body fall off quickly, avoid the case of a large amount of material loss, and further make the polycarbonate adhered in the box fall off by hammering the bottom of the heating box. The transmission structure of the above-mentioned scheme is complex, and the falling effect of polycarbonate is poor. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is that the transmission structure of the existing condensation devolatilization system for polycarbonate production is complex, and the falling effect of polycarbonate is poor.

[0005] In order to solve the above problems, the utility model provides a PC devolatilization system, the top of the heating box is provided with a feeding port, the bottom is provided with a discharge port, the heating box is horizontally placed and cylindrical, and the inner wall of the heating box is provided with a heating assembly, the heating box is provided with a motor, the output end of the motor is connected with a rotating shaft, the rotating shaft is inserted into the heating box and connected with a scraper rod, and the inner surface of the heating box side wall is in contact with the scraper rod.

[0006] The PC devolatilization system provided by the utility model also has the following technical features:

[0007] The scraper rod is at least centrally symmetric about the axis of the rotating shaft.

[0008] The outer side of the scraper rod is arc surface and in contact with the inner surface of the heating box side wall, the inner side of the scraper rod is connected with a support rod, and the end of the support rod is connected with the rotating shaft.

[0009] The output end of the motor can rotate reversely, and the two sides of the scraper rod oppositely form inclined surfaces.

[0010] The feeding port and the discharging port are both provided with a connecting flange.

[0011] The utility model discloses the following beneficial effects: in the later stage discharging process, the output end of motor drives the rotation of the rotating shaft, drives the scraper rod revolves around the rotating shaft and scrapes the inner wall of heating box to scrape the polycarbonate adhered to the inner surface of the lateral wall of heating box to the discharging port, simultaneously, through the vibration action of pneumatic vibrator, the polycarbonate adhered to the inner surface of the two ends of heating box gradually vibrates and falls off and is discharged to the discharging port, thereby avoiding the condition of a large amount of material loss, simple and reliable structure, and improving the falling effect of polycarbonate. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the axonometric view of the utility model;

[0013] Figure 2 It is the partial sectional view of Figure 1 ;

[0014] Figure 3 It is the partial structure schematic view in Figure 2 . DETAILED DESCRIPTION

[0015] Hereinafter, the utility model will be described in detail with reference to the drawings and in combination with embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0016] As Figures 1 to 3 shown, the utility model PC devolatilization system, the top of heating box 10 is equipped with feeding port 11, and the bottom is equipped with discharging port 12, and heating box 10 is horizontally placed cylinder, and the inside of its lateral wall is equipped with heating assembly 13, and heating box 10 is equipped with motor 14, and the output end of motor 14 is connected with rotating shaft 15, and rotating shaft 15 is inserted in heating box 10 and is connected with scraper rod 16, and scraper rod 16 is in contact with the inner surface of the lateral wall of heating box 10, and the two ends of heating box 10 are both equipped with pneumatic vibrator 17.

[0017] In the later stage discharging process, the output end of motor 14 drives the rotation of rotating shaft 15, drives scraper rod 16 revolves around rotating shaft 15 and scrapes the inner wall of heating box 10 to scrape the polycarbonate adhered to the inner surface of the lateral wall of heating box 10 to discharging port 12, simultaneously, through the vibration action of pneumatic vibrator 17, the polycarbonate adhered to the inner surface of the two ends of heating box 10 gradually vibrates and falls off and is discharged to discharging port 12, thereby avoiding the condition of a large amount of material loss, simple and reliable structure, and improving the falling effect of polycarbonate.

[0018] Wherein, the heating assembly 13 can be a nickel-chromium alloy heating wire material, the inside of the side wall of the heating box 10 is pre-slotted, and can be laid in a parallel arrangement, spiral winding or multi-layer mesh structure, so that the heating box 10 is made of metal or other heat-conducting materials, and the heating assembly is provided with corresponding power supply, temperature controller and temperature sensor to detect the heating temperature and adjust the heating power in real time. The pneumatic vibrator 17 is provided with an air inlet joint and is provided with corresponding auxiliary components such as pressure regulating valve, throttle valve and silencer, and control components such as electromagnetic reversing valve and PLC controller. In use, the compressed air supply end is connected with the air inlet joint. At least two pneumatic vibrators 17 are arranged at both ends of the heating box 10. Of course, the pneumatic vibrator 17 can also be arranged on the side wall of the heating box 10 to improve the vibration and shedding effect. The principle and specific installation and implementation mode of the heating assembly 13 and the pneumatic vibrator 17 are prior art, which will not be repeated here. In addition, other vibration devices such as electric vibrator or electromagnetic vibrator can also be used instead of the pneumatic vibrator 17, and the selection of the vibration device is not limited.

[0019] Wherein, the motor 14 is provided with corresponding power supply, controller and other components. The rotating shaft 15 and the heating box 10 are rotationally sealed by bearings and sealing rings.

[0020] Wherein, the inner surface of the side wall of the heating box 10 can be a conical surface, specifically, the discharge port 12 gradually inclines outward from both ends to the center, so as to facilitate the discharge of polycarbonate.

[0021] Preferably, the scraper rod 16 is at least centrally symmetric about the axis of the rotating shaft 15.

[0022] Preferably, the outer side of the scraper rod 16 is an arc surface and is in contact with the inner surface of the side wall of the heating box 10, the inner side of the scraper rod 16 is connected with a support rod 18, the end of the support rod 18 is connected with the rotating shaft 15, and the support rod 18 is spaced apart along the axial direction of the rotating shaft 15.

[0023] Preferably, the output end of the motor 14 can rotate forward and backward, and the two sides of the scraper rod 16 are formed with inclined surfaces 19.

[0024] The output end of the motor 14 drives the rotating shaft 15 to rotate forward and backward, and drives the scraper rod 16 to rotate forward and backward, and the scraped polycarbonate will slide down along the inclined surface 19, thereby improving the scraping effect and cleaning efficiency of the polycarbonate adhered to the inner surface of the side wall of the heating box 10.

[0025] Preferably, the feeding port 11 and the discharge port 12 are both provided with a connecting flange 20, and the feeding port 11 and the discharge port 12 are both provided with a corresponding control valve to control the feeding and discharging.

[0026] The working principle of the utility model is as follows:

[0027] In use, after the polycarbonate added to the inside of the heating box 10 is subjected to the first-stage heating devolatilization treatment, the polycarbonate will be subjected to thermal deformation in the heating box 10 due to the high temperature, that is, after the polycarbonate is subjected to thermal deformation, the polycarbonate will be more closely attached to the inner wall of the heating box 10 under the action of gravity, in the later discharging process, the output end of the motor 14 drives the rotating shaft 15 to rotate, the scraper rod 16 is driven by the supporting rod 18 to revolve around the rotating shaft 15 and scrape the inner wall of the heating box 10, so as to scrape the polycarbonate adhered to the inner surface of the side wall of the heating box 10 to the discharging port 12, at the same time, the polycarbonate adhered to the inner surface of the two ends of the heating box 10 is gradually vibrated and dropped by the pneumatic vibrator 17 and discharged to the discharging port 12, so as to avoid the situation that a large amount of material is lost, the structure is simple and reliable, and the dropping effect on the polycarbonate is improved.

[0028] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PC devolatilization system, the top of a heating tank (10) is provided with a feeding port (11), and the bottom is provided with a discharging port (12), characterized in that, The heating box (10) is horizontally placed and in a cylindrical shape, and a heating assembly (13) is arranged inside the side wall of the heating box (10). A motor (14) is arranged on the heating box (10), and the output end of the motor (14) is connected with a rotating shaft (15). The rotating shaft (15) is inserted into the heating box (10) and connected with a scraping rod (16). The scraping rod (16) is in contact with the inner surface of the side wall of the heating box (10). The two ends of the heating box (10) are both provided with pneumatic vibrators (17).

2. The PC devolatilization system of claim 1, wherein, The scraping rod (16) is at least centrally symmetrically arranged in two parts about the axis of the rotating shaft (15).

3. The PC devolatilization system of claim 1, wherein, The outer side of the scraping rod (16) is an arc surface and is in contact with the inner surface of the side wall of the heating box (10). The inner side of the scraping rod (16) is connected with a supporting rod (18), and the end of the supporting rod (18) is connected with the rotating shaft (15).

4. The PC devolatilization system of claim 1, wherein, The output end of the motor (14) can rotate in both directions. The two sides of the scraping rod (16) are oppositely provided with inclined surfaces (19).

5. The PC devolatilization system of claim 1, wherein, The feeding port (11) and the discharging port (12) are both provided with connecting flanges (20).

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