CN112406069B

CN112406069B - Plastic extruder capable of stably mixing materials and controlling temperature

Info

Publication number: CN112406069B
Application number: CN202011236431.XA
Authority: CN
Inventors: 时向东
Original assignee: 佛山市馨彩新材料科技有限公司
Current assignee: Foshan Xincai New Material Technology Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2022-04-22
Anticipated expiration: 2040-11-09
Also published as: CN112406069A

Abstract

The invention discloses a plastic extruder capable of stably mixing materials and controlling temperature, which comprises a mixing box and a box body, wherein the mixing box is fixedly arranged on the top surface of the box body, an extrusion cavity with an opening facing to the right is arranged in the box body, a material extruding head is fixedly arranged between the inner walls of the extrusion cavity, the right extending part of the material extruding head is positioned outside, an extrusion screw rod is rotatably arranged between the left wall of the extrusion cavity and the left side surface of the material extruding head, a material conveying cavity is arranged in the mixing box and is communicated with the extrusion cavity, and a feeding barrel is communicated and installed at the upper side of the material conveying cavity. The extrusion effect is improved.

Description

Plastic extruder capable of stably mixing materials and controlling temperature

Technical Field

The invention relates to the technical field of plastic extruders, in particular to a plastic extruder capable of stably mixing materials and controlling temperature.

Background

The plastic extruder is a raw materials mixing machine of preparation injection moulding raw materials, adopt the mode that the screw rod pay-off was extruded, and add the high temperature melting effect, make the raw materials can the misce bene, promote injection moulding performance, however, general extruder is all through feeding cylinder direct to screw rod extrusion space in reinforced, this kind of mode causes raw materials to block up very easily and the inhomogeneous problem of compounding takes place, and because add the raw materials granule size difference wherein, great granule not only causes the jam easily, still can make and extrude the material body in the extrusion process, finally lead to extruding effect to descend, in addition, in the device of heating accuse temperature, the inhomogeneous trouble of accuse temperature takes place often can appear.

Disclosure of Invention

The invention aims to solve the technical problem of providing a plastic extruder capable of stably mixing materials and controlling temperature, and solves the problems of uneven mixing material blockage and uneven heating and temperature control.

The invention is realized by the following technical scheme.

The invention relates to a plastic extruder capable of stably mixing materials and controlling temperature, which comprises a mixing box and a box body, wherein the mixing box is fixedly arranged on the top surface of the box body, an extrusion cavity with an opening facing right is formed in the box body, a material extruding head is fixedly arranged between the inner walls of the extrusion cavity, the right extending part of the material extruding head is positioned outside, an extrusion screw rod is rotatably arranged between the left wall of the extrusion cavity and the left side surface of the material extruding head, a material conveying cavity is formed in the mixing box and is communicated with the extrusion cavity, a feeding barrel is communicated and installed at the upper side of the material conveying cavity, a crushing mechanism capable of fully and uniformly mixing the raw materials is arranged in the material conveying cavity, the crushing mechanism comprises a fixed baffle plate fixedly arranged on the right wall of the material conveying cavity, a hollow shaft is rotatably arranged on the left wall of the material conveying cavity, a cylinder is fixedly arranged on the right side surface of the hollow shaft, and an annular baffle plate is fixedly arranged on the periphery of the cylinder, the annular baffle is rotatably connected with the left wall of the conveying cavity, the right side face of the cylinder is rotatably connected with the left side face of the fixed baffle, a rolling cavity is formed in the cylinder, a feeding opening with an upward opening is formed in the upper side communication of the rolling cavity, a rotating plate is arranged in the left wall rotation of the rolling cavity, inserting columns are fixedly distributed on the right side face of the rotating plate, a transmission screw is arranged in the hollow shaft, the right side extension part of the transmission screw penetrates through the inner walls of the cylinder and the rotating plate and extends into the rolling cavity, a rolling plate is fixedly arranged on the right side face of the rolling plate, inserting cavities which are uniformly distributed and are communicated from left to right are formed in the rolling plate, the inserting columns extend into the inserting cavities and are slidably connected with the inner walls of the inserting cavities, the rolling plate is slidably connected with the rolling cavity, and two closed blocks which are symmetrical from front to back are fixedly arranged on the left side face of the fixed baffle, the closed block can seal the feeding port, a temperature control mechanism capable of stably controlling and heating the temperature of the mixture extruded in the extrusion cavity is arranged in the box body, the temperature control mechanism comprises a heating annular cavity with an outward opening and arranged at the periphery of the extrusion cavity, a heat conduction layer is fixedly arranged on the inner wall of the side, close to the extrusion cavity, of the heating annular cavity, the heat conduction layer has heat conductivity, a rotary body is rotatably arranged between the left wall and the right wall of the heating annular cavity, three heaters are fixedly arranged on the rotary body, close to the side surface of the heat conduction layer in an array manner, the three heaters have different heating temperature values, a cooling cavity is arranged in the box body and is positioned on the outer peripheral side of the extrusion head, a cooling water cavity with a leftward opening is arranged in the box body, cooling water is stored in the cooling water cavity, a partition plate is fixedly arranged on the bottom wall of the cooling water cavity, and the level of the cooling water is lower than the partition plate, the right side intercommunication in cooling water cavity is equipped with the impeller cavity, it is equipped with two longitudinal symmetry's impeller shaft to rotate between the front and back wall in impeller cavity, the periphery of impeller shaft has set firmly the impeller, the upper and lower both sides in cooling cavity all communicate and have set firmly the water valve, the water valve stretches out the external world, the impeller cavity with be located the downside the conveyer pipe is installed in the intercommunication between the water valve.

Preferably, a motor cavity is formed in the left side of the extrusion cavity, a double-headed motor is fixedly mounted on the bottom wall of the motor cavity, an extending portion on the left side of the extrusion screw is in power connection with the right side face of the double-headed motor, a motor shaft is in power connection with the left side face of the double-headed motor, a vertical worm is rotatably arranged on the top wall of the motor cavity, a vertical shaft is rotatably arranged on the bottom wall of the motor cavity, a power bevel gear set is arranged in transmission connection among the vertical shaft, the vertical worm and the motor shaft, a connecting cavity is formed in the left side of the material conveying cavity, a cam cavity is formed in the left side of the connecting cavity, a worm cavity is formed in the lower side of the cam cavity, an extending portion on the upper side of the vertical worm penetrates through the worm cavity and is located in the cam cavity, a cam is fixedly arranged on the top surface of the vertical shaft, a movable plate is arranged between the inner walls of the cam cavity in a left-right sliding manner, and two reset springs which are vertically symmetrical are fixedly mounted between the right side face of the movable plate and the right wall of the cam cavity, the utility model discloses a cam assembly, including cam chamber, hollow shaft, movable plate, heat-conducting layer, connecting cavity, hollow shaft, fixed swivel nut, drive screw, heat-conducting layer, connecting cavity, worm wheel chamber, drive screw, hollow shaft left side extension is located the connecting cavity, and its left side with the connecting cavity left side wall rotates to be connected, drive screw left side extension run through the hollow shaft with fixed swivel nut, and be located the cam intracavity, and its left side with the movable plate rotates to be connected, fixed swivel nut with drive screw threaded connection, the cam can with the movable plate butt, the heat-conducting layer is located the periphery of connecting the intracavity has set firmly connecting gear, connecting the cavity with it is equipped with the transmission shaft to rotate between the worm wheel chamber, the right side of transmission shaft has set firmly drive gear, drive gear with connecting gear meshes, the left side of transmission shaft has set firmly the worm wheel, the worm wheel with vertical worm meshes.

Preferably, a transmission annular cavity with a rightward opening is formed in the box body, the transmission annular cavity is located on the left side of the heating annular cavity and is located on the periphery of the extrusion cavity, an annular block is fixedly arranged on the left side surface of the revolving body, a left extending portion of the annular block is located in the transmission annular cavity and is rotationally connected with the left wall of the transmission annular cavity, an annular gear is fixedly arranged on the periphery of the annular block located in the transmission annular cavity, a through cavity is communicated with the lower side of the transmission annular cavity, a cross shaft is rotatably arranged on the left wall of the through cavity, a power gear is fixedly arranged on the right side surface of the cross shaft and is meshed with the annular gear, a gear cavity is formed on the lower side of the motor cavity, a rectangular cavity is formed on the right side of the gear cavity, the rectangular cavity is located on the left side of the through cavity, and an extending portion of the left side of the cross shaft penetrates through the rectangular cavity, and is located in the gear cavity, the lower side extension part of the vertical shaft is located in the gear cavity, the vertical shaft and the transverse shaft which are located in the gear cavity are in transmission connection with each other and provided with a driven bevel gear set, the front wall of the rectangular cavity is provided with a gear shaft in a rotating manner, the gear shaft and the transverse shaft are in transmission connection with each other and provided with a connection bevel gear set, the front side of the rectangular cavity is provided with a driven cavity, the driven cavity is located at the front side of the impeller cavity, the connection bevel gear set and the two front side extension parts of the impeller shaft are both located in the driven cavity, the periphery of the connection bevel gear set located in the driven cavity is fixedly provided with a driven gear, the periphery of the impeller shaft located in the driven cavity is fixedly provided with a reverse gear, the reverse gear located at the upper side is meshed with the driven gear, the two reverse gears are mutually meshed, and a reflux valve is fixedly embedded in the partition plate, the right end of the backflow valve extends into the cooling water cavity, and the left end of the backflow valve is communicated with the water valves located on the upper side to be provided with a backflow pipe.

The invention has the beneficial effects that: according to the invention, through the rolling plate which rotates and moves back and forth left and right and the cylinder which always rotates, raw materials can intermittently enter the rolling cavity under the interaction of the rolling plate and the cylinder, and a fully mixed rolling effect is obtained, so that the diameter of particles can be reduced, the raw materials can be mixed more uniformly in the extrusion process, the extrusion effect is improved, and the heater can rotate by adopting the structural characteristic of the temperature control mechanism, so that the periphery of the extrusion cavity can obtain a uniform heating effect, and the problem of extrusion effect reduction caused by local heating failure of the heater is reduced.

Drawings

In order to more clearly illustrate the embodiments of the 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, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view showing the internal structure of a driven chamber according to the present invention;

FIG. 3 is a schematic view showing the internal structure of a feeding chamber according to the present invention;

FIG. 4 is a schematic view showing the direction A-A in example 3 of the present invention;

fig. 5 is a left side view of the structure of the millboard of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-5, the plastic extruder capable of stably mixing materials and controlling temperature comprises a mixing box 12 and a box body 61, wherein the mixing box 12 is fixedly arranged on the top surface of the box body 61, an extrusion cavity 52 with an opening facing right is formed in the box body 61, an extrusion head 49 is fixedly arranged between the inner walls of the extrusion cavity 52, the right extending part of the extrusion head 49 is positioned outside, an extrusion screw 48 is rotatably arranged between the left wall of the extrusion cavity 52 and the left side surface of the extrusion head 49, a material conveying cavity 57 is formed in the mixing box 12, the material conveying cavity 57 is communicated with the extrusion cavity 52, a feeding barrel 11 is communicated with the upper side of the material conveying cavity 57, a crushing mechanism 101 capable of fully and uniformly mixing materials is arranged in the material conveying cavity 57, the crushing mechanism 101 is fixedly provided with a fixing baffle 67 on the right wall of the material conveying cavity 57, a hollow shaft 60 is rotatably arranged on the left wall of the material conveying cavity 57, the right side of hollow shaft 60 has set firmly cylinder 69, the periphery of cylinder 69 has set firmly ring baffle 65, ring baffle 65 with it is connected to defeated material chamber 57 left wall rotation, the right flank of cylinder 69 with the left surface of fixed stop 67 is rotated and is connected, it grinds chamber 71 to have seted up in the cylinder 69, the upside intercommunication of grinding chamber 71 is equipped with pan feeding mouth 68 that the opening is up, the left wall of grinding chamber 71 rotates and is equipped with rotor plate 73, the right side evenly distributed of rotor plate 73 has set firmly inserted post 74, be equipped with drive screw 59 in the hollow shaft 60, the right side extension of drive screw 59 runs through the inner wall of cylinder 69 with rotor plate 73, and stretches into in grind chamber 71, and its right side has set firmly grind board 72, it has set up evenly distributed and has controlled the chamber 75 that link up in the grind board 72, inserted post 74 stretches into insert the chamber 75, and with insert 75 inner walls sliding connection, roll board 72 with roll chamber 71 sliding connection, the left surface of fixed stop 67 has set firmly two front and back symmetry's closing block 66, closing block 66 can seal pan feeding mouth 68, be equipped with in the box 61 and can to extrude the compounding that the chamber 52 is extruding and carry out the temperature control mechanism 102 of stable temperature control heating, temperature control mechanism 102 is including seting up extrude chamber 52 periphery and opening outside heating ring chamber 53, heating ring chamber 53 is close to extrude chamber 52 side inner wall and has set firmly heat-conducting layer 50, heat-conducting layer 50 has the heat conductivity, it is equipped with solid of revolution 45 to rotate between the wall about heating ring chamber 53, solid of revolution 45 is close to solid of revolution 50 side array distribution has set firmly three heater 51, three heater 51 heating temperature numerical value is different, seted up cooling chamber 47 in the box 61, the cooling cavity 47 is located the periphery side of the extrusion head 49, be equipped with the cooling water cavity 33 that the opening is left in the box 61, the cooling water cavity 33 is the deposit to have cooling water, the diapire of cooling water cavity 33 has set firmly baffle 32, and the cooling water liquid level is less than baffle 32, the right side intercommunication of cooling water cavity 33 is equipped with impeller cavity 37, it is equipped with two symmetrical impeller shafts 38 from top to bottom to rotate between the front and back wall of impeller cavity 37, impeller shaft 38's periphery has set firmly impeller 39, the upper and lower both sides of cooling cavity 47 all communicate and have set firmly water valve 46, water valve 46 stretches out the external world, impeller cavity 37 with be located the downside the conveyer pipe 44 is installed in the intercommunication between the water valve 46.

Beneficially, a motor cavity 24 is formed in the left side of the extrusion cavity 52, a double-headed motor 27 is fixedly mounted on the bottom wall of the motor cavity 24, an extending portion of the left side of the extrusion screw 48 is in power connection with the right side surface of the double-headed motor 27, a motor shaft 26 is in power connection with the left side surface of the double-headed motor 27, a vertical worm 19 is rotatably mounted on the top wall of the motor cavity 24, a vertical shaft 28 is rotatably mounted on the bottom wall of the motor cavity 24, a power bevel gear set 25 is arranged between the vertical shaft 28, the vertical worm 19 and the motor shaft 26 in a transmission connection manner, a connecting cavity 13 is formed in the left side of the material conveying cavity 57, a cam cavity 16 is formed in the left side of the connecting cavity 13, a worm cavity 20 is formed in the lower side of the cam cavity 16, an extending portion of the upper side of the vertical worm 19 penetrates through the worm cavity 20 and is located in the cam cavity 16, and a cam 18 is fixedly mounted on the top surface thereof, a moving plate 15 is arranged between the inner walls of the cam cavities 16 in a left-right sliding manner, two return springs 14 which are symmetrical up and down are fixedly arranged between the right side surface of the moving plate 15 and the right wall of the cam cavity 16, a fixed screw sleeve 17 is fixedly arranged on the right wall of the cam cavity 16, the left extending part of the hollow shaft 60 is positioned in the connecting cavity 13, the left side surface of the hollow shaft is rotatably connected with the left wall of the connecting cavity 13, the left extending part of the transmission screw 59 penetrates through the hollow shaft 60 and the fixed screw sleeve 17 and is positioned in the cam cavity 16, the left side surface of the transmission screw sleeve is rotatably connected with the moving plate 15, the fixed screw sleeve 17 is in threaded connection with the transmission screw 59, the cam 18 can be abutted against the moving plate 15, a connecting gear 58 is fixedly arranged on the periphery of the heat conduction layer 50 positioned in the connecting cavity 13, and a transmission shaft 22 is rotatably arranged between the connecting cavity 13 and the worm cavity 20, the right side of transmission shaft 22 sets firmly drive gear 23, drive gear 23 with connecting gear 58 meshes, the left side of transmission shaft 22 sets firmly worm wheel 21, worm wheel 21 with vertical worm 19 meshes, through the operation of double-end motor 27, can make motor shaft 26 drive vertical axis 28 with vertical worm 19 rotates, can make simultaneously extrusion screw 48 is rotatory, through the rotation of vertical worm 19, can make transmission shaft 22 with cam 18 rotate simultaneously, when transmission shaft 22 rotates, can make drive gear 23 drive connecting gear 58 rotates, thereby can make hollow shaft 60 drive cylinder 69 rotates, then when pan feeding mouth 68 is up, can make from feeding cylinder 11 fall into the raw materials intermittence in the conveying chamber 57 get into pan feeding mouth 68 with in the crushing chamber 71, the blockage is prevented, the moving plate 15 can move left and right back and forth through the rotation of the cam 18 and the elastic action of the return spring 14, the transmission screw 59 can move left and right back and forth, the transmission screw 59 can rotate back and forth through the fixed screw sleeve 17 when moving left and right back and forth, the rolling plate 72 can move left and right back and forth, the rolling plate 72 can rotate back and forth, when the feeding port 68 faces upwards, the rolling plate 72 moves left, when the feeding port 68 rotates downwards, the rolling plate 72 moves right and rotates towards the opposite direction of the cylinder 69, the rolling plate 72 and the right wall of the rolling cavity 71 can roll the raw materials in the rolling cavity 71 together, so that the effects of uniformly mixing and reducing the diameter of the raw material particles are achieved, the extrusion effect is improved, when the feeding port 68 faces downwards, the rolled raw materials in the rolling cavity 71 fall into the extrusion cavity 52, by the rotation of the extrusion screw 48, the raw material is extruded rightward.

Beneficially, a driving annular cavity 54 with a right opening is formed in the box body 61, the driving annular cavity 54 is located on the left side of the heating annular cavity 53 and on the periphery of the extrusion cavity 52, an annular block 55 is fixedly arranged on the left side surface of the revolving body 45, a left extending portion of the annular block 55 is located in the driving annular cavity 54 and is rotatably connected with the left wall of the driving annular cavity 54, an annular gear 56 is fixedly arranged on the periphery of the annular block 55 located in the driving annular cavity 54, a through cavity 43 is communicated with the lower side of the driving annular cavity 54, a transverse shaft 35 is rotatably arranged on the left wall of the through cavity 43, a power gear 42 is fixedly arranged on the right side surface of the transverse shaft 35, the power gear 42 is meshed with the annular gear 56, a gear cavity 34 is formed on the lower side of the motor cavity 24, a rectangular cavity 36 is formed on the right side of the gear cavity 34, and the rectangular cavity 36 is located on the left side of the through cavity 43, the left side extension part of the transverse shaft 35 penetrates through the rectangular cavity 36 and is positioned in the gear cavity 34, the lower side extension part of the vertical shaft 28 is positioned in the gear cavity 34, the vertical shaft 28 in the gear cavity 34 is in transmission connection with the transverse shaft 35 to be provided with a driven bevel gear set 29, the front wall of the rectangular cavity 36 is provided with a gear shaft 40 in rotation, the gear shaft 40 is in transmission connection with the transverse shaft 35 to be provided with a connecting bevel gear set 41, the front side of the rectangular cavity 36 is provided with a driven cavity 62, the driven cavity 62 is positioned at the front side of the impeller cavity 37, the connecting bevel gear set 41 and the front side extension parts of the two impeller shafts 38 are both positioned in the driven cavity 62, the periphery of the connecting bevel gear set 41 in the driven cavity 62 is fixedly provided with a driven gear 63, the periphery of the impeller shafts 38 in the driven cavity 62 is fixedly provided with a reverse gear 64, the reverse gear 64 positioned on the upper side is meshed with the driven gear 63, the two reverse gears 64 are meshed with each other, the return valve 31 is fixedly embedded in the partition plate 32, the right end of the return valve 31 extends into the cooling water cavity 33, the return pipe 30 is communicated and installed between the left end of the return valve 31 and the water valve 46 positioned on the upper side, the transverse shaft 35 can drive the gear shaft 40 and the power gear 42 to rotate through the rotation of the vertical shaft 28, the ring gear 56 can drive the ring block 55 to rotate through the power gear 42, so that the ring block 55 can drive the rotator 45 to rotate, the heater 51 can be rotated, the heater 51 is heated through the operation of the heater 51, the periphery of the extrusion cavity 52 can uniformly conduct heat through the heat conduction layer 50, and the problem of nonuniform local heating of the heater 51 can be prevented, simultaneously, through the rotation of gear shaft 40 can make driven gear 63 drives two reverse gear 64 rotates to opposite direction, then can make two impeller 39 rotates and drives cooling water in the cooling water chamber 33 passes through conveyer pipe 44 gets into in the cooling chamber 47, then can make the extruded material advance obtain the cooling effect when crowded stub bar 49, through back flow 30 can make the cooling water backward flow get into in the cooling water chamber 33.

In the initial state, the cam 18 contacts the moving plate 15, the return spring 14 is in a relaxed state, the inlet 68 is open upward, the plug 74 extends through the plug cavity 75, and the rolling plate 72 contacts the rotating plate 73.

When in use, the double-head motor 27 is operated, the motor shaft 26 can drive the vertical shaft 28 and the vertical worm 19 to rotate, the extruding screw 48 can be rotated, the transmission shaft 22 and the cam 18 can be simultaneously rotated by the rotation of the vertical worm 19, when the transmission shaft 22 rotates, the transmission gear 23 can drive the connecting gear 58 to rotate, so that the hollow shaft 60 can drive the cylinder 69 to rotate, when the feeding opening 68 faces upwards, raw materials falling into the feeding cavity 57 from the feeding barrel 11 can intermittently enter the feeding opening 68 and the rolling cavity 71 to prevent blockage, the movable plate 15 can move left and right back and forth by the rotation of the cam 18 and the elastic action of the return spring 14, the transmission screw 59 can move left and right back and forth by the fixed screw sleeve 17, and the rolling plate 72 can move left and right back and forth, when the material inlet 68 is upward, the rolling plate 72 moves leftwards, when the material inlet 68 rotates downwards, the rolling plate 72 moves rightwards and rotates towards the opposite direction of the cylinder 69, so that the rolling plate 72 and the right wall of the rolling cavity 71 roll the raw material in the rolling cavity 71 together, thereby achieving the effect of uniformly mixing and reducing the diameter of the raw material particles, further improving the extrusion effect, when the material inlet 68 is downward, the raw material rolled in the rolling cavity 71 falls into the extrusion cavity 52, the raw material is extruded rightwards through the rotation of the extrusion screw 48, the transverse shaft 35 drives the gear shaft 40 and the power gear 42 to rotate through the rotation of the vertical shaft 28, the annular gear 56 drives the annular block 55 to rotate through the power gear 42, so that the annular block 55 drives the revolving body 45 to rotate, the heater 51 rotates, at the moment, the heater 51 operates to heat, and the periphery of the extrusion cavity 52 can uniformly conduct heat through the heat conducting layer 50, the problem of uneven local heating of the heater 51 can be prevented, meanwhile, the driven gear 63 can drive the two reverse gears 64 to rotate in opposite directions through the rotation of the gear shaft 40, then the two impellers 39 can rotate to drive the cooling water in the cooling water cavity 33 to enter the cooling cavity 47 through the delivery pipe 44, the extruded material can be cooled when entering the extrusion head 49, and the cooling water can flow back to enter the cooling water cavity 33 through the return pipe 30.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can stabilize plastics extruder of compounding accuse temperature, includes mixing box and box, its characterized in that: the mixing box is fixedly arranged on the top surface of the box body, an extrusion cavity with a right opening is formed in the box body, an extrusion head is fixedly arranged between the inner walls of the extrusion cavity, the right extending part of the extrusion head is positioned outside, an extrusion screw rod is rotatably arranged between the left wall of the extrusion cavity and the left side surface of the extrusion head, a material conveying cavity is formed in the mixing box and is communicated with the extrusion cavity, a feeding barrel is communicated and installed at the upper side of the material conveying cavity, a crushing mechanism capable of fully and uniformly mixing materials is arranged in the material conveying cavity, the crushing mechanism comprises a fixed baffle plate fixedly arranged on the right wall of the material conveying cavity, a hollow shaft is rotatably arranged on the left wall of the material conveying cavity, a cylinder is fixedly arranged on the right side surface of the hollow shaft, an annular baffle plate is fixedly arranged on the periphery of the cylinder and is rotatably connected with the left wall of the material conveying cavity, and the right side surface of the cylinder is rotatably connected with the left side surface of the fixed baffle plate, a rolling cavity is formed in the cylinder, a feeding opening with an upward opening is communicated with the upper side of the rolling cavity, a rotating plate is arranged on the left wall of the rolling cavity in a rotating mode, inserting columns are uniformly distributed and fixedly arranged on the right side face of the rotating plate, a transmission screw rod is arranged in the hollow shaft, the right extending portion of the transmission screw rod penetrates through the inner walls of the cylinder and the rotating plate and extends into the rolling cavity, a rolling plate is fixedly arranged on the right side face of the rolling plate, inserting cavities which are uniformly distributed and communicated left and right are formed in the rolling plate, the inserting columns extend into the inserting cavities and are in sliding connection with the inner walls of the inserting cavities, the rolling plate is in sliding connection with the rolling cavity, two sealing blocks which are symmetrical in the front and back are fixedly arranged on the left side face of the fixed baffle, and the sealing blocks can seal the feeding opening;

the box is internally provided with a temperature control mechanism which can stably control the temperature of the extruded mixed material in the extrusion cavity and heat the mixed material, the temperature control mechanism comprises a heating annular cavity with an outward opening and arranged at the periphery of the extrusion cavity, the heating annular cavity is close to the inner wall of the side of the extrusion cavity, a heat conduction layer is fixedly arranged on the inner wall of the side of the extrusion cavity, the heat conduction layer has heat conductivity, a revolving body is rotatably arranged between the left wall and the right wall of the heating annular cavity, three heaters are fixedly arranged on the side surface of the revolving body close to the heat conduction layer in an array manner, the three heaters have different heating temperature values, a cooling cavity is arranged in the box and is positioned at the periphery side of the extrusion head, a cooling water cavity with a leftward opening is arranged in the box, cooling water is stored in the cooling water cavity, a partition plate is fixedly arranged on the bottom wall of the cooling water cavity, the level of the cooling water is lower than the partition plate, and an impeller cavity is communicated with the right side of the cooling water cavity, the impeller cooling device is characterized in that two impeller shafts which are symmetrical up and down are rotatably arranged between the front wall and the rear wall of the impeller cavity, impellers are fixedly arranged on the periphery of the impeller shafts, water valves are fixedly communicated with the upper side and the lower side of the cooling cavity and extend out of the outside, and conveying pipes are arranged between the impeller cavity and the water valves in a communicated manner.

2. The plastic extruder capable of stably mixing and controlling the temperature according to claim 1, is characterized in that: a motor cavity is formed in the left side of the extrusion cavity, a double-head motor is fixedly mounted on the bottom wall of the motor cavity, an extending portion of the left side of the extrusion screw is in power connection with the right side face of the double-head motor, a motor shaft is in power connection with the left side face of the double-head motor, a vertical worm is rotatably arranged on the top wall of the motor cavity, a vertical shaft is rotatably arranged on the bottom wall of the motor cavity, a power bevel gear set is arranged between the vertical shaft, the vertical worm and the motor shaft in a transmission connection manner, a connecting cavity is formed in the left side of the material conveying cavity, a cam cavity is formed in the left side of the connecting cavity, a worm cavity is formed in the lower side of the cam cavity, an extending portion of the upper side of the vertical worm penetrates through the worm cavity and is located in the cam cavity, a cam is fixedly arranged on the top surface of the vertical worm, a moving plate is arranged between the inner walls of the cam cavity in a left-right sliding manner, and two reset springs which are symmetrical up and down are fixedly mounted between the right wall of the moving plate and the right wall of the cam cavity, the utility model discloses a cam assembly, including cam chamber, hollow shaft, movable plate, heat-conducting layer, connecting cavity, hollow shaft, fixed swivel nut, drive screw, heat-conducting layer, connecting cavity, worm wheel chamber, drive screw, hollow shaft left side extension is located the connecting cavity, and its left side with the connecting cavity left side wall rotates to be connected, drive screw left side extension run through the hollow shaft with fixed swivel nut, and be located the cam intracavity, and its left side with the movable plate rotates to be connected, fixed swivel nut with drive screw threaded connection, the cam can with the movable plate butt, the heat-conducting layer is located the periphery of connecting the intracavity has set firmly connecting gear, connecting the cavity with it is equipped with the transmission shaft to rotate between the worm wheel chamber, the right side of transmission shaft has set firmly drive gear, drive gear with connecting gear meshes, the left side of transmission shaft has set firmly the worm wheel, the worm wheel with vertical worm meshes.

3. The plastic extruder capable of stably mixing and controlling the temperature according to claim 2, is characterized in that: the box body is internally provided with a transmission annular cavity with a rightward opening, the transmission annular cavity is positioned on the left side of the heating annular cavity and is positioned on the periphery of the extrusion cavity, the left side surface of the revolving body is fixedly provided with an annular block, the left extending part of the annular block is positioned in the transmission annular cavity and is rotationally connected with the left wall of the transmission annular cavity, the periphery of the annular block positioned in the transmission annular cavity is fixedly provided with an annular gear, the lower side of the transmission annular cavity is communicated with a through cavity, the left wall of the through cavity is rotationally provided with a cross shaft, the right side surface of the cross shaft is fixedly provided with a power gear, the power gear is meshed with the annular gear, the lower side of the motor cavity is provided with a gear cavity, the right side of the gear cavity is provided with a rectangular cavity, the rectangular cavity is positioned on the left side of the through cavity, and the extending part of the left side of the cross shaft penetrates through the rectangular cavity and is positioned in the gear cavity, the lower side extension part of the vertical shaft is positioned in the gear cavity, the vertical shaft positioned in the gear cavity is connected with the cross shaft in a transmission way and is provided with a driven bevel gear set, the front wall of the rectangular cavity rotates and is provided with a gear shaft, the gear shaft is connected with the cross shaft in a transmission way and is provided with a connecting bevel gear set, the front side of the rectangular cavity is provided with a driven cavity, the driven cavity is positioned at the front side of the impeller cavity, the connecting bevel gear set and the two front side extension parts of the impeller shaft are positioned in the driven cavity, the periphery of the connecting bevel gear set positioned in the driven cavity is fixedly provided with a driven gear, the periphery of the impeller shaft positioned in the driven cavity is fixedly provided with a reverse gear, the reverse gear is positioned at the upside and is meshed with the driven gear, the two reverse gears are mutually meshed, a reflux valve is fixedly embedded in the partition plate, and the right end of the reflux valve extends into the cooling water cavity, and a return pipe is arranged between the left end of the return valve and the water valve positioned at the upper side in a communicating manner.