A melt pretreatment system for improving the uniformity and stability of PC / ABS alloys

Abstract

The application discloses a kind of improve PC / ABS alloy uniformity and the melting pretreatment system of stability, it is related to plastic alloy pretreatment technical field, including the feeding disc that activity is arranged in tank interior and is made into raw material uniform dispersion by using spiral structure design and vibration force cooperation to improve drying efficiency and the reversing component that is fixed on feeding disc and is forced to fall in advance by using momentum theorem and Newton third law lower water content raw material;The reversing component includes the guide frame that is fixed in the side wall of feeding disc.The application can be simultaneously put into tank to dry whether PC or ABS raw material, need not additional temperature promotion or prolong drying time, can greatly shorten the time of raw material drying, improve the efficiency of product production.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic alloy pretreatment, in particular to a melting pretreatment system for improving uniformity and stability of PC / ABS alloy. BACKGROUND

[0002] In the field of modern polymer materials, polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS) are two widely used plastic materials with unique properties. PC has outstanding impact resistance and good optical transparency, but it has poor processing fluidity and insufficient chemical resistance. ABS has toughness, rigidity and processing fluidity, but it has relatively weak heat resistance and weather resistance. In order to integrate the advantages of the two and compensate for their respective defects, researchers have made PC and ABS into alloy materials. PC / ABS alloy combines the high impact resistance and heat resistance of PC with the good processability and low cost of ABS, forming a new material with more balanced performance and wider application range.

[0003] The overall manufacturing process of PC / ABS alloy is roughly as follows: first, mix PC and ABS raw materials in proportion, remove moisture after drying treatment, and then put them into an extruder to melt and blend at a specific temperature and screw speed, so that they are fully dispersed and uniform. Then, through extrusion granulation, alloy particles are made, and then through cooling, granulation and packaging processes, finished products are obtained. In order to ensure the integrity of the finished product and reduce the probability of bubble and silver streak generation, not only should PC and ABS raw materials be mixed strictly according to the scientific proportion, but also they should be reasonably dried.

[0004] During drying, due to the hygroscopicity of PC and ABS raw materials and the inconsistent diffusion rate of moisture in the raw materials, if the two kinds of raw materials are forced to dry together, in order to ensure the thoroughness of drying, the drying time will be inevitably prolonged or the drying temperature will be increased. If the two kinds of raw materials are over-dried (especially the ABS raw material with weak hygroscopicity, which is originally dried for a short time, if it is dried together with the PC raw material, it is easy to be over-dried), not only the performance will be reduced, but also the clumping will be caused and even the melting will be caused in advance. Therefore, generally, the two kinds of raw materials are dried separately, so that different drying plans can be made according to the characteristics of each kind of raw material, the performance reduction and clumping risk of the raw materials are reduced, and the qualified rate of the finished product is improved.

[0005] In actual production, the PC and ABS raw materials are dried separately, which is very time-consuming, especially when large quantities of products are produced, the drying time is too long, which leads to low production efficiency and long time, in order to speed up the production progress, many manufacturers choose to increase the drying temperature, but on the one hand, the temperature is not easy to control, the risk of caking and performance decline of the raw material is increased, on the other hand, high temperature is easy to cause the outer layer of the raw material to be dried quickly, while the inner layer of the raw material still has high water content, which leads to unsatisfactory drying efficiency.

[0006] In view of the above problems, it is urgent to make innovative design on the basis of the original PC / ABS alloy uniformity and stability improving melting pretreatment system. SUMMARY

[0007] The technical scheme of the present application provides a solution significantly different from the prior art, which is to provide a PC / ABS alloy uniformity and stability improving melting pretreatment system to solve the problem of time-consuming drying of PC and ABS raw materials.

[0008] To achieve the above object, the present application provides the following technical scheme: a PC / ABS alloy uniformity and stability improving melting pretreatment system, comprising a tank body and a hot air assembly arranged above the tank body, further comprising:

[0009] The feeding disc movably arranged in the tank body utilizes the spiral structure design and vibration force to uniformly disperse the raw materials, thereby improving the drying efficiency, and the reversing assembly fixed on the feeding disc utilizes the momentum theorem and Newton's third law to force the raw materials with low water content to fall in advance;

[0010] The reversing assembly comprises a guide frame fixed to the side wall of the feeding disc.

[0011] Preferably, the hot air assembly comprises a shell, a fan, a heating electrode wire and a temperature detector.

[0012] The bottom of the shell is provided in a hollow shape, and the inside of the shell is communicated with the inside of the tank body.

[0013] Preferably, a vertical rod is movably arranged in the middle of the hot air assembly.

[0014] The lower end of the vertical rod extends to the middle of the feeding disc and is fixedly connected with the feeding disc through a plurality of groups of connecting rods.

[0015] Preferably, the feeding disc is made of a combination of a plurality of groups of horizontal rods fixedly arranged in the middle of the two side baffles and the two side baffles.

[0016] The feeding disc is provided in a multilayer spiral structure with large size at the top and small size at the bottom.

[0017] Each layer of the feeding tray is staggered and distributed in steps;

[0018] The height of each layer of the feeding tray increases from top to bottom.

[0019] Preferably, the outer part of the vertical rod is movably sleeved with a spring in the hot air assembly;

[0020] The spring is symmetrically arranged in two groups, and one end of each group is fixedly connected with the inner wall of the hot air assembly;

[0021] The outer surface of the vertical rod is provided with a vibration motor.

[0022] Preferably, the guide frame is provided with a plurality of groups, and the plurality of groups are arranged in steps and opposite to each other according to the hierarchical trajectory of the feeding tray;

[0023] The bottom surface of the middle part of the guide frame is provided as an inclined surface, and the distance between the inclined surface and the cross bar of the feeding tray increases from top to bottom.

[0024] Preferably, the reversing assembly further comprises a leakage prevention plate, and the top surface and the bottom surface of the leakage prevention plate are respectively fixedly connected with the two adjacent baffles in the longitudinal direction of the feeding tray;

[0025] The width of the leakage prevention plate is consistent with the width of the guide frame.

[0026] Preferably, one side of the hot air assembly is fixedly penetrated with a hopper-shaped feeding pipe, and the bottom end of the hopper-shaped feeding pipe is located directly above the starting end of the feeding tray;

[0027] The lower end of the hopper-shaped feeding pipe is movably provided with a quantity control plug inside, and the top end of the quantity control plug is fixedly provided with a corner rod in the middle, and one end of the corner rod is fixedly connected with the top end of the vertical rod;

[0028] The outer wall of the quantity control plug is uniformly fixed with a material disturbing block;

[0029] The hopper-shaped feeding pipe and the quantity control plug are both provided as a circular truncated cone body, and the quantity control plug is movably arranged inside the lower end of the hopper-shaped feeding pipe.

[0030] Preferably, the bottom side of the tank is communicated with a waste discharge pipe;

[0031] The bottom surface of the tank is provided as an inclined surface, and the lowest end is communicated with the waste discharge pipe.

[0032] Preferably, the inner wall of the bottom of the tank is fixedly provided with a material blocking frame;

[0033] The opening of the material blocking frame is connected with the discharging part of the bottom of the feeding tray, and the two are close but not fixed;

[0034] The bottom of the tank is communicated with a discharging pipe;

[0035] The inside of the discharge pipe is communicated with the inside of the material blocking frame.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] 1、The present application utilizes the momentum theorem and Newton's third law, and combines the characteristics that the dry PC or ABS raw material has greater elasticity than the wet PC or ABS raw material. When the raw material is given an upward force by the vibration of the feeding disc, the dry raw material particles will hit the inclined surface at the top of the guide frame, and the guide frame will exert a counterforce on the raw material particles, so that the raw material particles will be bounced back at an angle perpendicular to the inclined surface. Finally, the dry raw material particles will be bounced directly to the next layer of the feeding disc, while the wet raw material particles have small elasticity and cannot reach the top of the guide frame, so they fall in the same layer of the feeding disc. Such reciprocating movement can make the dry raw material particles be discharged as soon as possible, while the wet raw material particles remain in the tank for continuous drying. In this way, whether it is PC or ABS raw material, it can be placed in the tank for drying at the same time, without the need for additional temperature increase or extension of the drying time, which can greatly shorten the drying time of the raw material and improve the production efficiency.

[0038] 2、In the present application, under the action of the multi-layer spiral structure of the feeding disc, and in cooperation with the vibration motor driving the feeding disc to generate vibration, the raw material can slowly fall along the track of the feeding disc, and with the vibration of the feeding disc, the raw material is not easy to stack, which is more conducive to allowing each raw material particle to be evenly blown by the hot air, so as to make the drying effect of the raw material better. At the same time, the hollow design in the middle of the feeding disc can also make the water on the surface of the raw material flow away in time, and there is less water accumulation to re-wet the raw material. The drying efficiency of the raw material will be higher, thereby strengthening the uniformity and stability of the PC / ABS alloy final product. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a first perspective view of the present application.

[0040] Figure 2 It is a cross-sectional view of the present application.

[0041] Figure 3 It is a schematic view of the feeding disc structure of the present application.

[0042] Figure 4 It is a schematic view of the feeding disc structure of the present application.

[0043] Figure 5 It is a schematic view of the guide frame structure of the present application.

[0044] Figure 6 It is a schematic view of the quantity control plug structure of the present application.

[0045] Figure 7The figure is a schematic diagram of the bucket-shaped feeding pipe structure of the application.

[0046] Figure 8 The figure is a schematic diagram of the spring structure of the application.

[0047] Figure 9 The figure is a schematic diagram of the partial cross-sectional front structure of the application.

[0048] Figure 10 The figure is a schematic diagram of the material blocking frame structure of the application.

[0049] In the figure: 1, tank body; 2, hot air assembly; 3, vertical rod; 4, angle rod; 5, bucket-shaped feeding pipe; 6, feeding disc; 7, guide frame; 8, leakage prevention plate; 9, quantity control plug; 10, spring; 11, vibration motor; 12, waste discharge pipe; 13, material blocking frame; 14, discharge pipe. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0051] Please refer to Figures 1 to 10 The application provides a technical solution: a melting pretreatment system for improving the uniformity and stability of PC / ABS alloy, which comprises a tank body 1 and a hot air assembly 2 arranged above the tank body 1, and further comprises:

[0052] The feeding disc 6 movably arranged in the tank body 1 is designed in a spiral structure and cooperates with vibration force to uniformly disperse raw materials, thereby improving drying efficiency, and the reversing assembly fixed on the feeding disc 6 forces raw materials with low water content to fall in advance according to the momentum theorem and Newton's third law.

[0053] The reversing assembly comprises a guide frame 7 fixed on the side wall of the feeding disc 6.

[0054] In a specific implementation, when the feeding disc 6 vibrates, the raw material particles on the feeding disc 6 are shaken and dispersed, so that the raw material particles are not easy to accumulate, and hot air can almost cover all the raw material particles during drying, thereby improving the completeness and comprehensiveness of drying.

[0055] The hot air assembly 2 comprises a shell, a fan, a heating electrode wire and a temperature detector.

[0056] The bottom of the shell is arranged in a hollow shape, and the inside of the shell is communicated with the inside of the tank body 1.

[0057] The middle of the hot air assembly 2 movably penetrates the vertical rod 3.

[0058] The lower end of the vertical rod 3 extends to the middle of the feeding tray 6 and is fixedly connected with the feeding tray 6 through a plurality of groups of connecting rods.

[0059] In a specific implementation, when the vertical rod 3 is affected by the vibration of the vibration motor 11, the vibration force is transmitted to the feeding tray 6 through the connecting rods, so as to realize the vibration of the whole feeding tray 6.

[0060] The feeding tray 6 is made of a plurality of groups of horizontal rods which are evenly distributed and fixed in the middle of the two side baffles;

[0061] In a specific implementation, gaps are left between the plurality of groups of horizontal rods, and the width of the gaps is smaller than the diameter of the raw material particles, so that the water can fall through the gaps, while the raw material particles remain on the horizontal rods, so that the water is not easy to mix with the raw material particles again, which can further speed up the drying speed, and the contact area of the raw material particles with the horizontal rods is small, which provides more space for the contact of the raw material particles with the hot air.

[0062] The feeding tray 6 is provided with a multilayer spiral structure which is large at the top and small at the bottom;

[0063] In a specific implementation, as shown in FIGS. 1 and 2, the cross section of the feeding tray 6 is approximately a conical body. Figure 3 and 4 As the raw materials are dried, the time for the raw materials to stay on the feeding tray 6 becomes shorter, which conforms to the most basic common sense logic of drying raw materials.

[0064] Each layer of the feeding tray 6 is distributed in a staggered manner.

[0065] In a specific implementation, each layer of the feeding tray 6 does not block each other, so as to prevent the water droplets of the upper layer from falling to the lower layer and affecting the drying progress of the raw materials.

[0066] The height of each layer of the feeding tray 6 increases from top to bottom.

[0067] In a specific implementation, the increase in the height of the feeding tray 6 with the spiral structure means that the slope is steeper, which can accelerate the discharge speed of the raw material particles which have been dried or are about to be dried, and also provides sufficient space for the upward movement of the raw material particles which are drier.

[0068] The outer part of the vertical rod 3 is movably sleeved with a spring 10 in the hot air assembly 2.

[0069] The spring 10 is symmetrically arranged in two groups, and one end of each group of the spring 10 is fixedly connected with the inner wall of the hot air assembly 2.

[0070] In a specific implementation, when the vertical rod 3 is vibrated by the vibration motor 11, the spring 10 can provide a buffering force for the upward or downward movement of the vertical rod 3, so as to prevent the vertical rod 3 from being excessively vibrated, and in addition, as shown in FIGS. 1 and 2, the spring 10 is arranged in the hot air assembly 2, so as to prevent the spring 10 from being affected by the heat of the hot air assembly 2. Figure 8As shown in the middle, the middle of the vertical rod 3 is fixed with a small disc, the two sides of the small disc are fixedly connected with the other end of the two groups of springs 10, and the small disc slides in the hot air assembly 2, so that the position of the vertical rod 3 is limited, the vertical rod 3 is prevented from slipping and deviating, and the other end of the two groups of springs 10 is supported

[0071] The outer surface of the vertical rod 3 is provided with a vibration motor 11.

[0072] In the specific implementation, the vibration motor 11 adopts a vertical vibration motor model, and the specific brand and model can be selected according to the requirements, and the present application does not make too much elaboration here.

[0073] The guide frame 7 is provided with a plurality of groups, and the plurality of groups of guide frames 7 are distributed in a stepped manner according to the hierarchical track of the feeding disc 6.

[0074] In the specific implementation, one end of the guide frame 7 is fixed with a group of baffles in the upper feeding disc 6, and the other end of the guide frame 7 is fixed with another group of baffles in the adjacent lower feeding disc 6, as shown in the accompanying drawings. Figure 5 As shown in the drawings, the guide frame 7 covers the adjacent upper and lower two layers of the feeding disc 6, so that the raw material particles can smoothly fall onto the next layer of the feeding disc 6 when colliding with the inclined surface of the guide frame 7, and the raw material will not fall excessively due to excessive elasticity or angle.

[0075] The bottom surface of the middle of the guide frame 7 is provided as an inclined surface, and the distance between the inclined surface and the horizontal bar of the feeding disc 6 increases from top to bottom.

[0076] In the specific implementation, some raw materials that have not been completely dried are prevented from colliding with the inclined surface of the guide frame 7 too early, so that the residence time of the raw materials that have not been completely dried on the feeding disc 6 is prolonged, and the more dried and elastic raw material particles can collide with the inclined surface of the guide frame 7.

[0077] The reversing assembly further comprises a leakage prevention plate 8, and the top surface and the bottom surface of the leakage prevention plate 8 are fixedly connected with two longitudinally adjacent baffles in the feeding disc 6.

[0078] The width of the leakage prevention plate 8 is consistent with the width of the guide frame 7.

[0079] In the specific implementation, the leakage prevention plate 8 prevents the raw material particles from falling again from the gap between the adjacent two layers of the feeding disc 6 when falling to the next layer of the feeding disc 6, and further ensures that the raw material particles can enter the next layer of the feeding disc 6.

[0080] One side of the hot air assembly 2 is fixedly penetrated with a hopper-shaped feeding pipe 5, and the bottom end of the hopper-shaped feeding pipe 5 is located directly above the starting end of the feeding disc 6.

[0081] In specific implementation, the inner diameter of the hopper-shaped feeding pipe 5 gradually decreases from top to bottom, and the inner diameter of the lowest end of the hopper-shaped feeding pipe 5 is smaller than the width of the baffle on both sides of the feeding disc 6, so as to ensure that the raw material particles cannot fall into a place other than the beginning of the feeding disc 6

[0082] The lower end of the hopper-shaped feeding pipe 5 is internally movably provided with a quantity control plug 9, and the top end of the quantity control plug 9 is fixedly provided with a corner rod 4 in the middle, and one end of the corner rod 4 is fixedly connected with the top end of the vertical rod 3.

[0083] The outer wall of the quantity control plug 9 is uniformly fixedly provided with a material disturbing block.

[0084] In specific implementation, when the material disturbing block vibrates up and down with the quantity control plug 9, the raw material in the hopper-shaped feeding pipe 5 is stirred to prevent the raw material in the hopper-shaped feeding pipe 5 from being blocked and unable to be discharged.

[0085] The hopper-shaped feeding pipe 5 and the quantity control plug 9 are both provided as circular truncated cone bodies, and the quantity control plug 9 is movably arranged in the lower end of the hopper-shaped feeding pipe 5.

[0086] In specific implementation, the diameters of the hopper-shaped feeding pipe 5 and the quantity control plug 9 both decrease from top to bottom, and the inclined aperture of the two can make the discharge amount of the raw material smaller, so as to prevent the beginning of the feeding disc 6 from being once stacked with too much raw material.

[0087] The bottom of the tank body 1 is communicated with a waste discharge pipe 12.

[0088] The bottom surface of the tank body 1 is provided in an inclined manner, and the lowest end is communicated with the waste discharge pipe 12.

[0089] In specific implementation, when the moisture drops to the bottom of the tank body 1, the moisture is affected by the inclined state of the bottom surface of the tank body 1 and is collected at the waste discharge pipe 12, so as to reduce the accumulation of the moisture in the tank body 1.

[0090] The inner wall of the bottom of the tank body 1 is fixedly provided with a material blocking frame 13.

[0091] The opening of the material blocking frame 13 is connected with the discharge opening of the bottom of the feeding disc 6, and the two are close but not fixed.

[0092] In specific implementation, the material blocking frame 13 can block the raw material to prevent the raw material from falling into the bottom of the tank body 1, so as to ensure that the raw material can be smoothly discharged, and in addition, the opening of the material blocking frame 13 should be larger than the size of the tail end of the feeding disc 6, so as to prevent the feeding disc 6 from colliding with the material blocking frame 13 when vibrating.

[0093] The bottom of the tank body 1 is communicated with a discharge pipe 14.

[0094] The inside of the discharge pipe 14 is communicated with the inside of the material blocking frame 13.

[0095] In the specific implementation, as shown in the figure spring 10, the top of the discharge pipe 14 is located inside the tank 1 fixed with the raised disc, which can be used to raise the height of the discharge port, can prevent moisture into the discharge port, so that moisture and raw materials are separated.

[0096] Working principle: when using the improved PC / ABS alloy uniformity and stability of the melting pretreatment system, first, the power supply for the overall power supply device, start the fan and heating electrode wire in hot air assembly 2, the fan will heat the heat of the electrode wire to the tank 1, here the specific required components in hot air assembly 2, electrical connection and control method are consistent with the prior art can be, in this invention is not described in detail, after the temperature is appropriate, start the vibration motor 11, and PC and ABS raw materials are poured into the tank 1 from the hopper inlet pipe 5, when the vibration motor 11 drives the vertical rod 3 vertical vibration, the angle bar 4 drive control plug 9 also vertical vibration, a small amount of raw materials in the hopper inlet pipe 5 relatively uniform into the feeding disc 6, the vertical rod 3 drive feeding disc 6 vertical vibration, raw materials are affected by vibration and dispersed, at the same time, the raw materials along the spiral track of the feeding disc 6 layer by layer down, the moisture separated from the raw materials during drying and the moisture on the surface of the raw materials fall to the bottom of the tank 1 along the gap of the horizontal bar, and follow the moisture together from the exhaust pipe 12.

[0097] When some of the raw material particles are relatively dry, they will bounce higher than the wet raw material particles with the vibration of the feeding disc 6, and the relatively dry raw material particles will hit the inclined surface of the guide frame 7 and change their original movement under the influence of the reaction force of the inclined surface of the guide frame 7, showing a bouncing state towards the center point of the feeding disc 6. Although some relatively dry raw material particles may not fall to the next layer of the feeding disc 6 after bouncing once, they will eventually bounce back to the next layer of the feeding disc 6 under the action of the inclined surface of the guide frame 7 after bouncing several times and approaching the center point of the feeding disc 6. Relatively wet raw material particles will not touch the top of the guide frame 7 due to insufficient bouncing force, so they will naturally fall back after bouncing for a short distance. With the continuous vibration of the feeding disc 6, the raw material particles will be "dried and sorted" once every time they pass through a group of guide frames 7. Dry raw material particles will enter the end of the feeding disc 6 in a short time, so that the phenomenon of over drying is less likely to occur. Part of the raw material particles that are not completely dried will stay on the feeding disc 6 for a longer time, which means they will be dried for a longer time until they are completely dried and come out of the end of the feeding disc 6. It should be noted that the angle and height of the inclined surface of the guide frame 7 in the drawings of the invention are only used as reference examples. Before using the device formally, the relevant parameters such as the angle of the inclined surface of the guide frame 7, the height of the guide frame 7, the spacing height of each layer of the feeding disc 6 and the vibration amplitude of the feeding disc 6 should be adjusted according to the requirements, and the production can be put into production after reaching the required standard.

[0098] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A melt pretreatment system for improving the uniformity and stability of PC / ABS alloys, comprising a tank (1) and a hot air assembly (2) disposed above the tank (1), characterized in that, Also includes: The activity is set inside the tank (1) by using a spiral structure design and vibration force to evenly disperse the raw materials and improve the drying efficiency of the feeding tray (6) and a reversing component fixed on the feeding tray (6) to force the raw materials with low moisture content to fall earlier by using the momentum theorem and Newton's third law. The reversing assembly includes a guide frame (7) fixed to the side wall of the feeding tray (6). The feeding tray (6) is composed of baffles on both sides and several sets of crossbars evenly distributed in the middle of the baffles on both sides. The feeding tray (6) is set as a multi-layer spiral structure with a larger top and a smaller bottom. Each layer of the feeding tray (6) is staggered in a stepped manner. The height of each layer of the feeding tray (6) increases from top to bottom. Several sets of guide frames (7) are provided. The several sets of guide frames (7) are arranged in a stepped manner and opposite each other according to the layer trajectory of the feeding tray (6). The bottom surface of the guide frame (7) in the middle is set as an inclined surface. The distance between the inclined surface and the crossbar of the feeding tray (6) increases from top to bottom. The reversing assembly also includes a leak-proof plate (8). The top and bottom surfaces of the leak-proof plate (8) are fixedly connected to two longitudinally adjacent baffles in the feeding tray (6). The width of the leak-proof plate (8) is the same as the width of the guide frame (7).

2. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 1, characterized in that: The hot air assembly (2) includes a housing, a fan, heating electrode wires, and a temperature detector; The bottom of the outer shell is hollowed out, and the inside of the outer shell is connected to the inside of the tank (1).

3. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 1, characterized in that: The hot air assembly (2) has a vertical rod (3) that moves through its middle. The lower end of the upright (3) extends to the middle of the feeding tray (6) and is fixedly connected to the feeding tray (6) through several sets of connecting rods.

4. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 3, characterized in that: The outside of the upright (3) is movably sleeved with a spring (10) inside the hot air assembly (2); The springs (10) are arranged symmetrically in two groups, one at each end of the two groups of springs (10) and fixedly connected to the inner wall of the hot air assembly (2). A vibration motor (11) is provided on the outer surface of the upright (3).

5. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 1, characterized in that: A bucket-shaped feed pipe (5) is fixedly inserted through one side of the hot air assembly (2), and the bottom end of the bucket-shaped feed pipe (5) is located directly above the beginning end of the feeding tray (6); The lower end of the bucket-shaped feed pipe (5) is movably provided with a control plug (9), and a bend rod (4) is fixed in the middle of the top of the control plug (9). One end of the bend rod (4) is fixedly connected to the top of the upright rod (3). The outer wall of the measuring plug (9) is uniformly fixed with scrambling blocks; Both the bucket-shaped feed pipe (5) and the metering plug (9) are configured as frustum bodies, and the metering plug (9) is movably disposed inside the lower end of the bucket-shaped feed pipe (5).

6. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 1, characterized in that: The bottom side of the tank (1) is connected to a waste discharge pipe (12). The bottom surface of the tank (1) is inclined, and the lowest end is connected to the waste discharge pipe (12).

7. The melt pretreatment system for improving the uniformity and stability of PC / ABS alloys according to claim 1, characterized in that: A baffle frame (13) is fixed to the bottom inner wall of the tank (1). The opening of the baffle frame (13) is connected to the discharge port at the bottom of the feeding tray (6), and the two are close but not fixed; The bottom of the tank (1) is connected to a discharge pipe (14). The inside of the discharge pipe (14) is connected to the inside of the baffle frame (13).

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