CN115464795A

CN115464795A - Automatic raw material weighing and proportioning mixing equipment for plastic shell

Info

Publication number: CN115464795A
Application number: CN202211191627.0A
Authority: CN
Inventors: 李建华; 冯小坤; 徐坤; 臧政生
Original assignee: Anhui Huateng Renewable Metal Technology Co ltd
Current assignee: Anhui Huateng Renewable Metal Technology Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-13
Anticipated expiration: 2042-09-28
Also published as: CN115464795B

Abstract

The invention discloses a raw material automatic weighing and proportioning mixing device of a plastic shell, which relates to the technical field of mixing devices.

Description

Automatic raw material weighing and proportioning mixing equipment for plastic shell

Technical Field

The invention relates to the technical field of mixing equipment, in particular to automatic weighing and proportioning mixing equipment for raw materials of a plastic shell.

Background

The production mode of the plastic shell mainly adopts blow molding, extrusion molding or hot pressing processes, wherein raw materials comprise PVC, PE, PP, PET and the like, different materials are proportioned according to a certain proportion according to actual production requirements, then, various materials are mixed and melted, and the mixture is injected into a mold by utilizing structures such as a glue extruder and the like for cooling and shaping to complete production.

In the raw material mixing proportion, because the raw materials mostly exist in the form of solid particles, the proportion is carried out in a weighing mode which is the simplest and most effective mode, in the allowable weight error, the weight of each raw material is distributed according to the proportion, in the specific weighing proportion process, when the proportion amount of a certain raw material is too small or too large, manual intervention is needed for adjustment and resetting, and the whole operation mode is troublesome;

in addition, after the raw materials are mixed and melted, the obvious layering problem of different raw materials after melting is avoided, otherwise, the produced plastic shell has poor quality and even is unqualified.

In view of the above technical problems, the present application proposes a solution.

Disclosure of Invention

The invention aims to provide a raw material automatic weighing and proportioning mixing device for a plastic shell, which is used for solving the problem of low production efficiency indirectly caused by manual intervention and adjustment and resetting when proportioning errors are large when raw materials for producing the plastic shell are prepared.

The purpose of the invention can be realized by the following technical scheme: including the pylon and install the compounding section of thick bamboo at pylon central point downside position, compounding section of thick bamboo downside is provided with crowded rubber pipe, and is provided with the stop valve between the inlet port of compounding section of thick bamboo downside export and crowded rubber pipe, install a plurality of mounting brackets, every on the position of pylon upside all be provided with branch feed cylinder, every be provided with the conveying pipeline on the branch feed cylinder lower extreme position, every the conveying pipeline runs through the pylon, and communicates between terminal and the compounding section of thick bamboo upper end is inside, install first weighing sensor on the mounting bracket four corners position, every first weighing sensor's transmission shaft upwards extends to on the outer wall position of branch feed cylinder, and fixed connection between first weighing sensor's transmission shaft and the branch feed cylinder, slidable mounting has the feed bin box on the inside upside position of branch feed cylinder, and the branch feed cylinder is located and installs a plurality of second weighing sensor on the position of feed bin box inner wall, every second weighing sensor is annular array along the centre point of branch feed cylinder and distributes, and fixed connection between second weighing sensor's transmission shaft and feed bin box lower surface, the branch feed cylinder is located the inner wall position of second weighing sensor downside and installs the branch feed bin, the downside is provided with second grade structure upper end.

Further setting the following steps: first order ejection of compact structure includes striker plate and a plurality of wrong material mouth and discharge gate, feed bin box lower surface indent position department installs first servo motor, be connected between first servo motor's the output shaft and the striker plate, be in on the coplanar between striker plate upper surface and the feed bin box lower surface, the discharge gate is seted up on the striker plate, and the discharge gate is the annular array setting along the centre of a circle point of striker plate, wrong material mouth is seted up on the lower surface position of feed bin box, and wrong material mouth is the annular array along the centre of a circle point of feed bin box and distributes, wrong material mouth is the distribution of staggering with the discharge gate.

Further setting the following steps: the second-stage discharging structure comprises an electric telescopic cylinder and a conical plug, a transmission shaft of the electric telescopic cylinder is connected with the conical plug, a supporting ring frame is installed on the electric telescopic cylinder and welded on the inner wall of the mixing barrel, the cross section of the material distributing plate is in an arch shape which is bent downwards, and an opening matched with the conical plug is formed in the lower side position of the material distributing plate.

Further setting the following steps: a plurality of exhaust ports are formed in the upper end position of the mixing barrel, an external heating sleeve is installed on the outer wall position of the mixing barrel, an inner sleeve which is vertically distributed is arranged at the central point position of the mixing barrel, and an electric heating rod is inserted into the inner sleeve.

Further setting the following steps: the inner sleeve is provided with a material mixing plate, the material mixing plate is arranged at a position lower than the tail end of the material conveying pipe, the diameter of the material mixing plate is smaller than the inner diameter of the material mixing barrel, the cross section of the material mixing plate is conical, and the upper surface of the material mixing plate is provided with a plurality of material distributing grooves;

the inner sleeve is arranged at the upper side of the outer part of the mixing barrel and is provided with a connecting drive disk, the inner sleeve is rotatably connected with the mixing barrel, a drive motor is arranged at the outer part of the mixing barrel, and the output end of the drive motor is connected with the connecting drive disk.

Further setting the following steps: every install the protective sheath on the outside curved surface of conveying pipeline, install second servo motor on the protective sheath internal position, the conveying pipeline rotates on corresponding second servo motor's the internal position and installs and divide the material butterfly piece, second servo motor's output shaft runs through the conveying pipeline and is connected with dividing the material butterfly piece.

Further setting the following steps: the material distributing butterfly piece is characterized in that arc-shaped rubber plugs are installed on the outer walls of the two sides of the material distributing butterfly piece, the arc-shaped rubber plugs are matched with the inner wall of the material conveying pipe, and the arc-shaped rubber plugs are arranged in a staggered mode along the material distributing butterfly piece.

The invention has the following beneficial effects:

1. according to the integral scheme, raw materials are proportioned in a weighing mode of a weight sensor, the weighing process is divided into a first weight sensor and a second weight sensor, and the material discharging process is divided into a first-stage material discharging mode and a second-stage material discharging mode, so that the effect of successive material discharging is achieved, the material discharging process at a certain end is error, and the quantity can be compensated or limited through the first-stage material discharging mode or the second-stage material discharging mode;

2. in the material mixing process, when different raw materials enter the material mixing cylinder, the different raw materials firstly pass through the material mixing plate, and the material mixing plate can be driven by the inner sleeve to rotate, so that the different raw materials can be disordered and diffused under the action of the material mixing plate, and the different raw materials are fully mixed;

3. and finally, a material distributing butterfly sheet is arranged at the position of the material conveying pipe between the discharging process and the melting process, the material distributing butterfly sheet can play a role in blanking, and arc-shaped rubber plugs arranged at two sides of the material distributing butterfly sheet are used for blocking the melting process and the discharging process and preventing gas generated in the melting process from entering a material distributing cylinder.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an automatic raw material weighing and proportioning mixing device for plastic shells, which is provided by the invention;

FIG. 2 is a schematic structural diagram of a mixing barrel part in an automatic raw material weighing and proportioning mixing device for a plastic shell according to the present invention;

FIG. 3 is a sectional view of a mixing barrel part in the automatic raw material weighing and proportioning mixing device for plastic shells, which is provided by the invention;

FIG. 4 is a schematic structural diagram of a material distributing barrel component of an automatic raw material weighing and proportioning mixing device with a plastic casing according to the present invention;

FIG. 5 is a sectional view of a material distributing barrel part of the automatic material weighing and proportioning mixing device with plastic casing according to the present invention;

FIG. 6 is a cut-away view of the bin box component of the automatic raw material weighing and proportioning mixing device with plastic casing according to the present invention;

FIG. 7 is a sectional view of a material distributing plate part of an automatic material weighing and proportioning mixing device for a plastic shell according to the present invention;

FIG. 8 is a sectional view of a material conveying pipe part of an automatic raw material weighing and proportioning mixing device for a plastic casing according to the present invention;

fig. 9 is a schematic structural diagram of a material distributing butterfly piece part of the automatic material weighing and proportioning mixing device for the plastic shell.

In the figure: 1. a tower; 2. a mounting frame; 3. a material separating barrel; 4. a mixing barrel; 5. an external heating jacket; 6. a shut-off valve; 7. extruding a rubber pipe; 8. a delivery pipe; 9. an exhaust port; 10. an inner sleeve; 11. an electric heating rod; 12. a drive motor; 13. a material mixing plate; 14. a material distributing groove; 15. a protective sleeve; 16. a first weight sensor; 17. a bin box; 18. a second weight sensor; 19. a material distributing plate; 20. a first servo motor; 21. a striker plate; 22. a discharge port; 23. a material staggering port; 24. a conical plug; 25. an electric telescopic cylinder; 26. a support ring frame; 27. a second servo motor; 28. a material separating butterfly sheet; 29. an arc rubber plug; 30. a drive plate is connected.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

In the plastic casing production process, need add raw and other materials according to different proportions, it is the simplest and most effective mode to utilize the mode of weighing to match raw and other materials, but at this in-process, the deviation can appear in the raw and other materials weight of weighing, after the deviation exceeds maximum error volume, just need artificial intervention to adjust, has reduced production efficiency, for this the following technical scheme that has proposed:

referring to fig. 1, 2, 4, 5, 6 and 7, an automatic raw material weighing and proportioning mixing device with a plastic shell comprises a tower frame 1 and a mixing barrel 4 arranged at the lower side of the central point of the tower frame 1, wherein a rubber extruding pipe 7 is arranged at the lower side of the mixing barrel 4, a cut-off valve 6 is arranged between an outlet at the lower side of the mixing barrel 4 and an inlet of the rubber extruding pipe 7, a plurality of mounting frames 2 are arranged at the upper side of the tower frame 1, a material distributing barrel 3 is arranged on each mounting frame 2, a material conveying pipe 8 is arranged at the lower end of each material distributing barrel 3, each material conveying pipe 8 penetrates through the tower frame 1, the tail end of each material conveying pipe 8 is communicated with the inner part of the upper end of the mixing barrel 4, first weight sensors 16 are arranged at four corners of the mounting frames 2, a transmission shaft of each first weight sensor 16 extends upwards to the outer wall position of the material distributing barrel 3, and fixed connection between the transmission shaft of first weight sensor 16 and feed cylinder 3, slidable mounting has feed bin box 17 on the inside upside position of feed cylinder 3, and feed cylinder 3 is located and installs a plurality of second weight sensors 18 on the inner wall position of feed bin box 17 downside, every second weight sensor 18 is distributed along the centre of a circle of feed cylinder 3 for annular array, and fixed connection between the transmission shaft of second weight sensor 18 and the lower surface of feed bin box 17, install on the inner wall position of feed cylinder 3 below second weight sensor 18 and divide flitch 19, the feed bin box 17 downside is provided with first order ejection of compact structure, divide and be provided with second order ejection of compact structure on the flitch 19 downside position, be provided with the compounding structure on the upper end position of feed cylinder 4.

First order ejection of compact structure includes striker plate 21 and a plurality of wrong material mouth 23 and discharge gate 22, feed bin box 17 lower surface indent position department installs first servo motor 20, be connected between first servo motor 20's the output shaft and the striker plate 21, be in on the coplanar between striker plate 21 upper surface and the feed bin box 17 lower surface, discharge gate 22 is seted up on striker plate 21, and discharge gate 22 is the annular array setting along the centre of a circle point of striker plate 21, wrong material mouth 23 is seted up on the lower surface position of feed bin box 17, and wrong material mouth 23 is the annular array distribution along the centre of a circle point of feed bin box 17, wrong material mouth 23 is the distribution of staggering with discharge gate 22.

The second-stage discharging structure comprises an electric telescopic cylinder 25 and a conical plug 24, a transmission shaft of the electric telescopic cylinder 25 is connected with the conical plug 24, a supporting ring frame 26 is installed on the electric telescopic cylinder 25, the supporting ring frame 26 is welded on the inner wall of the mixing barrel 4, the cross section of the material distributing plate 19 is in a downward bent arch shape, and an opening matched with the conical plug 24 is formed in the lower side position of the material distributing plate 19.

The working principle is as follows: before use, each material distributing barrel 3 is used for storing a raw material, when the raw material is not placed, the weight of the whole material distributing barrel 3 is detected by using a first weight sensor 16, the weight of a bin box 17 is detected by using a second weight sensor 18, displayed values of the first weight sensor 16 and the second weight sensor 18 are unhaired, then the raw material with corresponding weight is placed in each bin box 17, the real-time weight is detected by using the second weight sensor 18 in the corresponding position, a material baffle plate 21 can be driven by a first servo motor 20 to rotate, a wrong material opening 23 and a material outlet 22 are overlapped, so that the raw material falls out of the bin box 17, and on the contrary, the raw material cannot fall out;

in addition, when the electric telescopic cylinder 25 is started, the conical plug 24 moves downwards, so that the raw materials positioned on the upper side of the material distributing plate 19 fall out and enter the mixing cylinder 4 along the material conveying pipe 8;

and in the weighing process, the following modes are included:

1): the raw materials in each material distributing barrel 3 are proportionally added with an appropriate amount of raw materials, taking one material distributing barrel 3 as an example, the amount of the raw materials required to be added is A parts, the amount of the materials added by the bin box 17 is theoretically A parts, however, in the scheme, the amount of the materials added by the bin box 17 is nearly 1/2A parts, but the real-time weight change of the bin box 17 is detected by the second weight sensor 18, namely the weight of the bin box 17 is B parts in an initial state, and the weight of the bin box 17 is changed into B-1/2A parts after 1/2A parts are added;

2): when the raw material falling on the material-separating plate 19 is not discharged, the weight change detected by the first weight sensor 16 is also B parts, and then after the conical plug 24 is opened, the raw material on the material-separating plate 19 enters the mixing cylinder 4, and at this time, after the material-separating plate 19 is blocked by the conical plug 24, another 1/2A part of raw material is again thrown in the hopper box 17, and in this way, the material is circularly thrown;

in combination with the above parts, the weight value of the material stored on the material distributing plate 19 is equal to the weight value displayed on the first weight sensor 16 minus the weight value displayed on the second weight sensor 18, wherein the material distributing plate 19 is used as a second discharging structure and also used as a transit structure;

then when the following two parts occur:

x1: the actual amount of the raw material discharged from the dispensing cartridge 3 at the corresponding position is smaller than the preset discharge amount, which can be understood as that the weight of the raw material dispensed from the magazine 17 is "wrong", but 1/2A of the raw material is discharged from the magazine 17 in each cycle, and 1/2A of the raw material is temporarily stored on the dispensing plate 19, so that at this time, the raw material on the dispensing plate 19 is discharged first, and another 1/2A of the raw material discharged from the magazine 17 is received again, and the discharge is continued, but in the last step, no raw material is on the dispensing plate 19, so that the stock box 17 dispenses the amount lacking in the above process again;

x2: when the actual amount of the raw material discharged from the material distributing cylinder 3 at the corresponding position is greater than the preset discharge amount, wherein the raw material discharged from the material distributing cylinder 3 for the first time is discharged along the material conveying pipe 8, then the raw material of 1/2A in another period is fed from the bin 17 according to the normal state, but in the discharging process, the electric telescopic cylinder 25 drives the tapered plug 24 to reciprocate up and down, so that the raw material on the material distributing plate 19 is discharged intermittently, it should be noted again that the weight change of the whole material distributing cylinder 3 is detected by the external first weight sensor 16, it is ensured that the fed raw material is a part, that is, the raw material still remains in the material distributing plate 19, the weight value displayed on the first weight sensor 16 minus the weight value displayed on the second weight sensor 18 is the weight of the remaining raw material, and the value can be set to be Y, then when the raw material is fed next time into the bin 17, the fed weight should be: 1/A-Y;

the process is carried out circularly, and the weighing process can be supplemented or limited.

Example two

Referring to fig. 1 and 3, a plurality of exhaust ports 9 are formed in the upper end position of a mixing barrel 4, an outer heating sleeve 5 is installed on the outer wall position of the mixing barrel 4, an inner sleeve 10 which is vertically distributed is arranged at the central point position of the mixing barrel 4, an electric heating rod 11 is inserted into the inner sleeve 10, a mixing plate 13 is installed on the inner sleeve 10, the arrangement position of the mixing plate 13 is lower than the tail end position of a material conveying pipe 8, the diameter of the mixing plate 13 is smaller than the inner diameter of the mixing barrel 4, the cross section of the mixing plate 13 is conical, and a plurality of material distributing grooves 14 are formed in the upper surface of the mixing plate 13;

the inner sleeve 10 is arranged at the upper side outside the mixing barrel 4 and is provided with a connecting driving disk 30, the inner sleeve 10 is rotatably connected with the mixing barrel 4, the outer position of the mixing barrel 4 is provided with a driving motor 12, and the output end of the driving motor 12 is connected with the connecting driving disk 30.

The working principle is as follows: after the raw materials are put into the mixing cylinder 4, the raw materials are melted into semi-fluid under the heating action of the external heating jacket 5 and the electric heating rod 11, and the melted mixture can be discharged along the rubber extrusion pipe 7 when the cut-off valve 6 is opened;

what needs to be explained here is: the raw materials in each material distributing barrel 3 may enter the material mixing barrel 4 at the same time, so that in the process, under the action of the driving motor 12, the inner sleeve 10 is firstly driven to rotate, and when the inner sleeve 10 rotates, the material mixing plate 13 is also driven to rotate;

then, when the mixing plate 13 rotates, each distributing chute 14 thereon breaks up the raw materials, so that the different raw materials are sufficiently diffused and slowly fall into the lower side of the mixing cylinder 4 for melting treatment, in the process of ensuring sufficient mixing between the raw materials.

EXAMPLE III

The raw material discharged from each material distributing cylinder 3 enters the material mixing cylinder 4 along the material conveying pipe 8, and the high-temperature gas generated during the melting process in the material mixing cylinder 4 may enter the material distributing cylinder 3 along the material conveying pipe 8, which may affect the actual weighing effect.

Refer to fig. 1, fig. 2, fig. 8 and fig. 9, install protective sheath 15 on the outside curved surface of every conveying pipeline 8, install second servo motor 27 on the protective sheath 15 internal position, it installs branch material butterfly piece 28 to rotate on the internal position that conveying pipeline 8 corresponds second servo motor 27, the output shaft of second servo motor 27 runs through conveying pipeline 8 and is connected with dividing material butterfly piece 28, divide material butterfly piece 28 both sides outer wall and all install arc rubber buffer 29, match between arc rubber buffer 29 and branch material butterfly piece 28 and the conveying pipeline 8 inner wall, and arc rubber buffer 29 is dislocation set along dividing material butterfly piece 28.

The working principle is as follows: in the initial state, the material-dividing butterfly sheet 28 is positioned in the feed delivery pipe 8 under the action of the second servo motor 27, and completely blocks the positions on the two sides of the material-dividing butterfly sheet 28, so that the inside of the feed delivery pipe 8 is not circulated;

when a part of raw materials are discharged from the material distributing cylinder 3, the raw materials firstly enter the material conveying pipe 8, at the moment, the second servo motor 27 is started to drive the material distributing butterfly sheet 28 to continuously rotate, in the rotating process, the arc-shaped rubber plug 29 on the material distributing butterfly sheet 28 is always contacted with the inner wall of the material conveying pipe 8, under the state, high-temperature gas generated in the melting process still cannot enter the material distributing cylinder 8, but when the material distributing butterfly sheet 28 drives the arc-shaped rubber plug 29 to rotate, the arc-shaped rubber plug 29 can grab a part of raw materials to enter the other side position, namely, the raw materials are close to one side of the material distributing cylinder 4, so that the normal input of the raw materials is ensured, and waste gas generated in the melting process cannot enter the material distributing cylinder 3.

To sum up: the discharging process is divided into a first-stage discharging mode and a second-stage discharging mode, so that the effect of successive discharging is achieved, the discharging process at a certain end is error, and the quantity can be supplemented or limited through the first-stage discharging mode or the second-stage discharging mode; and in the compounding process, when different raw and other materials entered into the compounding section of thick bamboo, at first through the material mixing plate, the material mixing plate can drive the material mixing plate to rotate under the drive effect of interior sleeve pipe, so under the effect of material mixing plate, can be in disorder with different raw and other materials and spread, make different raw and other materials intensive mixing.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a raw materials automatic weighing of plastics shell, ratio mixing apparatus, includes pylon (1) and installs mixing drum (4) at pylon (1) central point downside position, its characterized in that, mixing drum (4) downside is provided with crowded rubber tube (7), and is provided with stop valve (6) between mixing drum (4) downside export and the inlet port of crowded rubber tube (7), install a plurality of mounting brackets (2) on pylon (1) upside position, every all be provided with on mounting bracket (2) and divide feed cylinder (3), every be provided with conveying pipeline (8) on divide feed cylinder (3) lower extreme position, every conveying pipeline (8) run through pylon (1), and conveying pipeline (8) end and mixing drum (4) upper end inside between communicate, install first weight sensor (16) on mounting bracket (2) four corners position, every the transmission shaft of first weight sensor (16) upwards extends to the outer wall position of branch feed cylinder (3), and the transmission shaft of first weight sensor (16) and divide and fixedly connect between feed cylinder (3), the slide block (3) position and install the inner wall of branch feed cylinder (18) and divide feed cylinder (17) and divide feed cylinder (3) to be the position and divide feed cylinder (17) and divide feed cylinder (18) and be the inner wall of the distribution of the second weight sensor (17) on the feed cylinder (18), and fixed connection between the transmission shaft of second weight sensor (18) and feed bin box (17) lower surface, divide feed cylinder (3) to be located and install branch flitch (19) on the inner wall position of second weight sensor (18) downside, feed bin box (17) downside is provided with first order ejection of compact structure, divide and be provided with second order ejection of compact structure on flitch (19) downside position, be provided with the compounding structure on compounding section of thick bamboo (4) upper end position.

2. The raw material automatic weighing and proportioning mixing device of plastic casing, according to claim 1, characterized in that, first order ejection of compact structure includes striker plate (21) and a plurality of mistake material mouth (23) and discharge gate (22), first servo motor (20) are installed to feed bin box (17) lower surface indent position department, be connected between output shaft and striker plate (21) of first servo motor (20), be in on the coplanar between striker plate (21) upper surface and feed bin box (17) lower surface, discharge gate (22) are seted up on striker plate (21), and discharge gate (22) are the annular array setting along the centre of circle point of striker plate (21), mistake material mouth (23) are seted up on the lower surface position of feed bin box (17), and mistake material mouth (23) are the annular array along the centre of circle point of feed bin box (17) and distribute, mistake material mouth (23) are the distribution of staggering with discharge gate (22).

3. The automatic raw material weighing and proportioning mixing device for the plastic casing according to claim 1, wherein the second-stage discharging structure comprises an electric telescopic cylinder (25) and a conical plug (24), a transmission shaft of the electric telescopic cylinder (25) is connected with the conical plug (24), a supporting ring frame (26) is mounted on the electric telescopic cylinder (25), the supporting ring frame (26) is welded on the inner wall of the mixing barrel (4), the cross section of the distributing plate (19) is in a downward-bent arch shape, and an opening matched with the conical plug (24) is formed in the lower side position of the distributing plate (19).

4. The automatic raw material weighing and proportioning mixing device with the plastic shell as claimed in claim 1, wherein a plurality of exhaust ports (9) are formed in the upper end of the mixing barrel (4), an external heating sleeve (5) is mounted on the outer wall of the mixing barrel (4), an inner sleeve (10) which is vertically distributed is arranged at the central point of the mixing barrel (4), and an electric heating rod (11) is inserted into the inner sleeve (10).

5. The automatic raw material weighing and proportioning mixing device for the plastic shells as claimed in claim 4, wherein a material mixing plate (13) is mounted on the inner sleeve (10), the material mixing plate (13) is arranged at a position lower than the tail end of the material conveying pipe (8), the diameter of the material mixing plate (13) is smaller than the inner diameter of the material mixing barrel (4), the cross section of the material mixing plate (13) is conical, and a plurality of material distributing grooves (14) are formed in the upper surface of the material mixing plate (13);

the mixing device is characterized in that the inner sleeve (10) is located at the upper side of the outer portion of the mixing barrel (4) and is provided with a connecting driving disk (30), the inner sleeve (10) is rotatably connected with the mixing barrel (4), a driving motor (12) is arranged at the outer portion of the mixing barrel (4), and the output end of the driving motor (12) is connected with the connecting driving disk (30).

6. The automatic weighing and proportioning mixing device for raw materials with plastic shells as claimed in claim 1, wherein each conveying pipe (8) is provided with a protective sleeve (15) on its outer curved surface, a second servo motor (27) is installed on the inner position of the protective sleeve (15), a material distributing butterfly piece (28) is rotatably installed on the conveying pipe (8) corresponding to the inner position of the second servo motor (27), and the output shaft of the second servo motor (27) penetrates through the conveying pipe (8) and is connected with the material distributing butterfly piece (28).

7. The automatic raw material weighing and proportioning mixing device for the plastic shells as claimed in claim 6, wherein arc-shaped rubber plugs (29) are mounted on the outer walls of the two sides of the material distribution butterfly piece (28), the arc-shaped rubber plugs (29) are matched with the inner walls of the material distribution butterfly piece (28) and the material delivery pipe (8), and the arc-shaped rubber plugs (29) are arranged in a staggered manner along the material distribution butterfly piece (28).