CN107440145B

CN107440145B - Feed extruder

Info

Publication number: CN107440145B
Application number: CN201710641517.2A
Authority: CN
Inventors: 潘武刚
Original assignee: Tongzi Huamei Lexiang Breeding Co ltd
Current assignee: Harbin Zhongfu Animal Husbandry Co ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2020-04-21
Anticipated expiration: 2037-07-31
Also published as: CN107440145A

Abstract

The invention discloses a feed extruder, relates to the field of feed production, in particular to the field of feed molding, and comprises a rack, an extruding mechanism, a material cutting mechanism and a conveying belt, wherein the extruding mechanism is rotationally connected with the rack; the extruding mechanism comprises an extruding cylinder, a fan and a motor, the motor is fixed on the rack, the fan is fixed on the extruding cylinder, a heating cavity and an air inlet cavity are arranged in the side wall of the extruding cylinder, the heating cavity is connected with a water inlet pipe and a water outlet pipe, and the air outlet end of the fan is communicated with the air inlet cavity; a forming channel is arranged on the extruding cylinder, the forming channel comprises a heating section and a cooling section, the diameter of the cooling section is larger than that of the heating section, and an air outlet hole is formed in the side wall of the cooling section; a feed hopper is arranged outside the extrusion cylinder, and a collecting cylinder is sleeved outside the extrusion cylinder; the blank mechanism includes the cutter to and propulsion subassembly, the conveyer belt is located the collecting vessel below. The scheme can quickly dry the surface of the feed and quickly increase the moisture on the surface of the feed, thereby avoiding feed adhesion.

Description

Feed extruder

Technical Field

The invention relates to the field of feed production, in particular to the field of feed forming.

Background

Pregnant cows need to be given a large amount of nutrients for the calf to grow, and some nutrients are difficult to obtain from forage, so that the pregnant cows need to be given special feed to supplement nutrients. For convenience of eating, the cattle feed is generally made into cylindrical granules, and during production, various nutrient substances are firstly crushed, then water is added for blending to form a viscous mixture, and then the mixture is extruded into granules through an extrusion device.

In order to form the feed, chinese patent No. CN104786543B discloses a cold extrusion feed machine, which comprises an extruding mechanism, wherein the extruding mechanism comprises a material cylinder, a material pressing piston, an extruding driving mechanism and a discharging mold, the front and rear ends of the material cylinder are open, the material pressing piston is arranged in the material cylinder and is driven by the extruding driving mechanism to slide along the axial direction of the material cylinder, the discharging mold is arranged at the front end of the material cylinder, and a material storage cavity is formed inside the material cylinder and between the material pressing piston and the discharging mold; the charging barrel is in a straight barrel shape with two open ends, the front end of the charging barrel is provided with a feed opening, and the discharging die is detachably connected with the feed opening; the extrusion die is characterized by further comprising a rack and a cutting mechanism, wherein the extrusion mechanism is fixed on the rack through a support assembly, and the cutting mechanism is arranged on the front end face of the discharge die. When extruding the fodder, send into the feed cylinder with the mixture in, crowded material actuating mechanism promotes and presses the material piston motion, makes the mixture in the feed cylinder pass discharge mold, and cutting mechanism cuts the strip mixture that passes discharge mold, forms columniform fodder.

Although the extrusion feed machine can form the feed into cylindrical granules, the holes on the discharging die are close, so after the mixture passes through the discharging die to form the strip-shaped feed, the formed feed is still not dried, the adjacent strip-shaped feed is adhered, the granular feed cannot be formed after the feed is cut by the cutting mechanism, and the blocky feed can be formed. Secondly, the extruded feed is still sticky, still contains water and has no improvement in hardness, so that the strip-shaped appearance is difficult to maintain.

Disclosure of Invention

The invention aims to provide a feed extruder which can quickly dry the surface of feed and avoid adhesion.

In order to achieve the purpose, the technical scheme of the invention is as follows: the feed extruder comprises a rack, an extruding mechanism, a cutting mechanism and a conveying belt, wherein the extruding mechanism is rotationally connected with the rack; the extruding mechanism comprises an extruding cylinder with two sealed ends, a fan and a motor for driving the extruding cylinder to rotate, the motor is fixed on the frame, the fan is fixed on the extruding cylinder, a heating cavity close to the inner wall of the extruding cylinder and an air inlet cavity close to the outer wall of the extruding cylinder are arranged in the side wall of the extruding cylinder, the heating cavity is connected with a water inlet pipe and a water outlet pipe, and the air outlet end of the fan is communicated with the air inlet cavity; the extrusion cylinder is provided with a plurality of circular tube-shaped forming channels penetrating through the side wall of the extrusion cylinder, each forming channel comprises a heating section penetrating through the heating cavity and a cooling section penetrating through the air inlet cavity, the diameter of the cooling section is larger than that of the heating section, and the side wall of the cooling section is provided with a plurality of air outlet holes communicated with the air inlet cavity; a feed hopper which is communicated with the extrusion cylinder and is fixedly connected with the rack is arranged outside the extrusion cylinder, and a collecting cylinder which is fixedly connected with the rack is sleeved outside the extrusion cylinder; the material cutting mechanism comprises a cutter positioned between the extruding cylinder and the collecting cylinder and a pushing assembly for pushing the cutter to slide along the axial direction of the extruding cylinder, and the conveyor belt is positioned below the collecting cylinder.

When the feed is produced, the motor and the conveyor belt are firstly opened, hot water is introduced into the heating cavity from the water inlet pipe, the motor enables the extrusion cylinder to rotate, the viscous mixture is placed into the feed hopper, and the mixture enters the extrusion cylinder through the feed hopper. As the extruding cylinder rotates, the mixture entering the extruding cylinder is subjected to the action of centrifugal force, and the mixture clings to the inner wall of the extruding cylinder under the action of the centrifugal force and flows out of the forming channel. And then the fan is turned on, and the fan inflates the air inlet cavity. The mixture entering the forming channel firstly enters the heating section, the side wall of the heating section is kept at a higher temperature by hot water in the heating cavity, the side wall of the heating section heats the mixture attached to the side wall, and then the mixture enters the cooling section. Since the diameter of the cooling section is larger than that of the heating section, the mixture just entering the cooling section can maintain the shape in the heating section, so that a gap is left between the mixture and the side wall of the cooling section. Because the fan is continuously inflated into the air inlet cavity, the air pressure in the air inlet cavity is increased, and the air in the air inlet cavity is blown out from the air outlet hole to form air blown to the mixture. The surface of the mixture is heated, so that under the action of the continuously blown wind, the water on the surface of the mixture is quickly evaporated, the hardness is increased, and the cylindrical shape during extrusion can be kept after the mixture leaves the forming channel.

The pushing assembly is opened, the pushing assembly pushes the cutter to slide along the axial direction of the extruding cylinder, when the cutter passes through the forming channel, the feed extruded from the forming channel is broken, and the broken feed falls to the bottom of the collecting cylinder. After the cutter moved to the other end from extrusion cylinder one end, impeld the subassembly and promote the cutter and slide to opposite direction, the cutter is at reverse motion's in-process, makes the fodder rupture of newly extruding, and the cutter promotes the fodder that falls to the collecting vessel bottom simultaneously and moves to the tip of collecting vessel and extrusion cylinder, and the fodder falls on the conveyer belt from the tip of collecting vessel at last. After the cutter recovered the normal position, propulsion assembly made the cutter reverse again, and the cutter made the fodder rupture of extruding to promote the fodder that falls to the collecting vessel bottom and move to another tip of collecting vessel, the fodder falls out from another tip of collecting vessel, so the fodder can fall out from the collecting vessel both ends at last, and the conveyer belt drives fashioned fodder and leaves the extruder. The hot water in the heating cavity can flow out from the water outlet pipe, the motor and the fan are turned off after production is finished, the hot water is stopped to be introduced into the heating cavity, and the propulsion assembly is stopped.

The beneficial effect of this scheme does: the feeding hopper is connected with the extruding cylinder, the mixture continuously enters the extruding cylinder through the feeding hopper, the pressure inside the extruding cylinder can be increased by the continuously entering mixture, the mixture is promoted to flow out from the forming channel, and therefore the flowing speed of the mixture is increased. The extrusion cylinder rotates, the mixture in the extrusion cylinder is also acted by centrifugal force, and the speed of entering the forming channel can be accelerated, so that the extrusion forming efficiency is higher.

And (II) the hot water keeps the side walls of the heating cavity and the heating section at high temperature, the surface of the mixture entering the heating section can be heated, the temperature of the moisture in the mixture is also increased, after the mixture enters the cooling section, the liquid water is quickly changed into water vapor by the heat in the moisture, the movement of the water vapor is accelerated by the air blown out of the air blowing holes, the humidity in the cooling section is reduced, and the evaporation of the moisture in the mixture is further accelerated.

And (III) the mixture is still under the action of centrifugal force after entering the cooling section, the centrifugal force enables the mixture to continuously move towards the outside of the extrusion cylinder, and the air blown out from the air outlet has a force towards the radial direction of the mixture, so that the mixture just entering the cooling section can still keep the shape of the heating section and cannot deform.

And (IV) after entering the cooling section, the moisture on the surface of the feed is quickly evaporated, and the hardness of the surface of the feed is increased, so that the feed cannot be adhered to the inner wall of the collecting cylinder and other feeds after falling into the collecting cylinder.

Preferably scheme one, as the further improvement to basic scheme, impel the subassembly and include air supply and the propulsion cylinder of fixing in the frame, impel the cylinder and communicate with the air supply, impel the push rod and the cutter fixed connection of cylinder. When the feed pushing device starts to produce, the air source is opened, the air source inflates air into the pushing cylinder, a push rod of the pushing cylinder extends out, a pushing cutter slides towards one end far away from the pushing cylinder along the extruding cylinder, the cutter enables extruded feed to be broken, the feed falls to the bottom of the collecting cylinder, when the cutter moves to one end, far away from the pushing cylinder, of the extruding cylinder, the air source is controlled, the air in the pushing cylinder is pumped out by the air cylinder, the push rod of the pushing cylinder gradually restores to the original position, the cutter is driven to be gradually close to the pushing cylinder, and in the process, the cutter enables the extruded feed to be broken and simultaneously pushes the feed falling to the bottom of the collecting cylinder out from one end, close. When the air source inflates the propelling cylinder again, the cutter pushes the feed falling to the bottom of the collecting cylinder out of one end, far away from the propelling cylinder, of the collecting cylinder.

Preferably, in the second scheme, as a further improvement of the basic scheme, two opposite guide grooves are formed in the inner wall of the collecting cylinder, the guide grooves are parallel to the axial direction of the collecting cylinder, and a sliding block which is matched with the guide grooves and can slide along the guide grooves is fixed on the cutting knife; the pushing assembly comprises an iron block embedded in the cutter and two annular electromagnets fixed on the rack, and the two electromagnets are respectively positioned at two ends of the collecting cylinder. When the feed cutting machine starts to produce, firstly, the electromagnet far away from one end of the cutter is opened, the electromagnet attracts the iron block, and the cutter slides towards one end of the opened electromagnet under the action of the electromagnetic force of the electromagnet on the iron block to cut the feed; after the cutter moves to the collecting cylinder and is close to the electro-magnet one end of opening, close the electro-magnet of opening, open another electro-magnet, another electro-magnet attracts the iron plate, the cutter is close to another electro-magnet gradually under the effect of electromagnetic force to the fodder that will fall the collecting cylinder bottom is released, when the cutter moves to the collecting cylinder and is close to another electro-magnet one end, close another electro-magnet again, open the electro-magnet that is located the collecting cylinder and keeps away from cutter one end, so reciprocal, constantly cut the fodder of extruding, and release the collecting cylinder with the fodder.

Preferably, the third cylinder is a further improvement of the first cylinder, the propulsion cylinder comprises a first cylinder and a second cylinder which are respectively positioned on two sides of the extrusion cylinder, and the air source is simultaneously communicated with the first cylinder and the second cylinder. The first cylinder and the second cylinder push the cutter to slide simultaneously, and the second cylinder are arranged oppositely, so that the two sides of the cutter are both pushed, and the cutter cannot be skewed due to uneven stress when sliding.

In a fourth preferred embodiment, as a further improvement to the second preferred embodiment or the third preferred embodiment, a heat insulating layer is fixed to the inner wall of the extrusion cylinder. The heat insulating layer can prevent the mixture attached to the inner wall of the extruding cylinder from forming massive feed after being heated for a long time and the moisture is evaporated in a large amount, so that the forming channel can be prevented from being blocked by the massive feed, and the extruding cylinder can continuously extrude the feed.

Preferably, in a fifth aspect, as a further improvement to the fourth aspect, cylindrical blades are fixed to both sides of the cutter, and the inner diameter of each blade is equal to the outer diameter of the extrusion cylinder. The inner wall of cutting edge and the contact of extruding a section of thick bamboo outer wall, at the cutter motion in-process, just can be close to an extrusion section of thick bamboo one end from the fodder of extruding to the cutting edge of cutter direction of motion and cut, the fodder cross-section is level and smooth with extrusion section of thick bamboo outer wall parallel and cross-section, so when the cutter passes through, the fodder of being connected with the mixture in the extrusion section of thick bamboo can not lead to the fact the motion of cutter and block, can avoid the cutter to the outstanding fodder grinding to can reduce the production that the bits of broken glass cut, reduce the waste of.

Preferably, the fifth step, the sixth step, the fifth step, the sixth step, the seventh step, the sixth step, the fifth step. When the extruding cylinder rotates, the cover body is fixedly connected with the rack and cannot rotate along with the rotating, so that the extruding cylinder rotates relative to the cover body, and the feeding hopper can keep static.

Preferably, the seventh aspect, as a further improvement to the sixth aspect, a stirring shaft coaxial with the extrusion cylinder is arranged in the extrusion cylinder, the end of the stirring shaft penetrates through the extrusion cylinder and is fixedly connected with the frame, and a spiral guide blade is fixed on the stirring shaft. The (mixing) shaft is fixed in the frame, so at extrusion cylinder pivoted in-process, extrusion cylinder rotates with the relative (mixing) shaft of extrusion cylinder pivoted mixture along with, so the (mixing) shaft can stir the mixture in the extrusion cylinder, is avoided being in the mixture by kibbling nutrient substance and moisture separation, and then avoids solid-state nutrient substance to flow out in can't following the shaping passageway. The guide vanes are fixed on the stirring shaft, the diameter of the stirring shaft can be increased, the stirring effect of the stirring shaft is enhanced, and the mixture in the extrusion cylinder can move to the other end from one end of the extrusion cylinder close to the feed hopper, so that the extrusion cylinder is filled with materials.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a partial cross-sectional view of the barrel sidewall of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

The reference signs are: the device comprises a frame 1, a first cylinder 11, a push rod 111, an air source 12, a motor 13, a driving gear 14, a fan 15, an electromagnet 16, a limiting block 17, a feed hopper 2, a discharge end 21, an extrusion cylinder 3, a forming channel 31, a heating section 311, a cooling section 312, an air outlet 313, a heat insulation layer 32, a heating cavity 33, an air inlet cavity 34, a cover body 35, a wedge block 351, a water inlet pipe 36, a water outlet pipe 37, a rotating gear 38, a collecting cylinder 4, a guide groove 41, a stirring shaft 5, a guide blade 51, a cutter 6, a cutting edge 61, an iron block 62, a slide block 63 and a conveyor belt.

Example 1

As shown in figure 1, the feed extruder comprises a frame 1, an extruding mechanism, a cutting mechanism and a conveyor belt 7. The extruding mechanism comprises an extruding cylinder 3 with two sealed ends, a fan 15 and a motor 13, wherein the motor 13 is fixed on the frame 1 through bolts, and the fan 15 is fixed on the outer wall of the extruding cylinder 3 through bolts. The inner wall of the extrusion cylinder 3 is glued with a heat insulation layer 32, and the heat insulation layer 32 in the embodiment is a heat insulation rubber sheet. A heating cavity 33 and an air inlet cavity 34 positioned at the periphery of the heating cavity 33 are arranged in the side wall of the extrusion cylinder 3, the left end of the heating cavity 33 is communicated with a water inlet pipe 36, and the right end of the heating cavity 33 is communicated with a water outlet pipe 37. The air outlet end of the fan 15 is connected with an air outlet pipe, and the left end of the air outlet pipe penetrates through the outer side wall of the extruding cylinder 3 and is communicated with the air inlet cavity 34. The extrusion cylinder 3 is provided with a plurality of forming channels 31 penetrating through the side wall of the extrusion cylinder 3, as shown in fig. 2, each forming channel 31 comprises a heating section 311 penetrating through the heating cavity 33 and a cooling section 312 penetrating through the air inlet cavity 34, the heating section 311 and the cooling section 312 are both cylindrical, the diameter of the cooling section 312 is larger than that of the heating section 311, and eight air outlet holes 313 communicated with the air inlet cavity 34 are circumferentially arranged on the side wall of the cooling section 312. A feed hopper 2 is arranged at the left end of the extrusion cylinder 3, the lower end of the feed hopper 2 is a discharge end 21 with the diameter smaller than that of the upper end, and the upper end of the feed hopper 2 is welded on the frame 1; an opening is formed in the end portion of the left end of the extrusion cylinder 3, an annular rotating groove is formed in the side wall of the opening, the section of the rotating groove is wedge-shaped, a cover body 35 for sealing the opening is arranged at the opening, the side wall of the left side of the cover body 35 is welded on the rack, an annular wedge block 351 capable of being clamped into the rotating groove is integrally formed in the side wall of the cover body 35, and the discharge end 21 of the feed hopper 2 penetrates through the cover body 35 and is communicated with the inner cavity of the extrusion cylinder 3; the right end of the water inlet pipe 36 penetrates the cover body 35 and is communicated with the heating cavity 33. The inside of the extrusion cylinder 3 is provided with a stirring shaft 5, and the right end of the stirring shaft 5 penetrates through the right end of the extrusion cylinder 3 and is welded on the frame 1. The stirring shaft 5 is integrally formed with a helical guide blade 51, and the guide blade 51 is located in the extrusion cylinder 3. The left end and the right end of the extrusion cylinder 3 are both placed on the rack 1, a rotating gear 38 is welded at the right end of the extrusion cylinder 3, and a driving gear 14 meshed with the rotating gear 38 is welded on an output shaft of the motor 13.

3 overcoat of extruding cylinder is equipped with a collecting cylinder 4, and collecting cylinder 4 sets up with 3 coaxial settings of extruding cylinder, and collecting cylinder 4 welds on frame 1. The blank mechanism includes cutter 6 and propulsion subassembly, and cutter 6 is located between collection cylinder 4 and the extrusion cylinder 3, and the inner periphery and the extrusion cylinder 3 contact, the periphery and the collection cylinder 4 contact of cutter 6. Cylindrical blades 61 are integrally formed on both sides of the cutter 6, and the inner circumference of the blade 61 contacts the extrusion cylinder 3. In this embodiment, the propelling assembly includes an air source 12 and a propelling cylinder, the propelling cylinder includes a first cylinder 11 and a second cylinder, the first cylinder 11 and the second cylinder are respectively located at two sides of the extruding cylinder 3, as shown in fig. 3, push rods 111 of the first cylinder 11 and the second cylinder are both welded to the cutting knife 6, and the air source 12 is communicated with the first cylinder 11 and the second cylinder through plastic pipes. The conveyor belt 7 is located below the collecting cylinder 4.

When producing fodder, open motor 13 and conveyer belt 7 earlier, and let in hot water from inlet tube 36 to heating chamber 33 in, motor 13 makes extrusion cylinder 3 rotate, put into feeder hopper 2 with thick mixture again, the mixture gets into extrusion cylinder 3 through feeder hopper 2 in, extrusion cylinder 3 rotates, and (mixing) shaft 5 is fixed in frame 1, so (mixing) shaft 5 rotates relative extrusion cylinder 3, stir the mixture in extrusion cylinder 3, guide blade 51 also rotates relative extrusion cylinder 3, guide blade 51 plays the guide effect, the mixture that makes to be located extrusion cylinder 3 left end moves to extrusion cylinder 3 right-hand member. Initially, the cutter 6 is located at the left end of the barrel 3. Since the barrel 3 rotates, the mixture entering the barrel 3 rotates, and the mixture entering the barrel 3 is subjected to centrifugal force and flows out of the forming passage 31. The fan 15 is turned on again, and the fan 15 inflates the air inlet chamber 34. The mixture entering the forming passage 31 first enters the heating section 311, the hot water in the heating chamber 33 keeps the side wall of the heating section 311 at a high temperature, the side wall of the heating section 311 heats the surface of the mixture attached thereto, and then the mixture enters the cooling section 312. Since the diameter of the cooling section 312 is larger than the diameter of the heating section 311 and the mixture is maintained in the heating section 311 as it leaves the heating section 311, i.e., the mixture maintains the same diameter as the heating section 311, a gap is left between the mixture and the side wall of the cooling section 312. As the fan 15 continuously inflates the air inlet cavity 34, the air pressure in the air inlet cavity 34 is increased, the air in the air inlet cavity 34 is blown out from the air outlet holes 313 to form air blowing towards the mixture, and the air quickly evaporates the moisture on the surface of the mixture, increases the hardness and then maintains the shape when the mixture is positioned in the forming channel 31.

Then, the air source 12 is opened, the air source 12 enables the first air cylinder 11 and the second air cylinder to do reciprocating motion, when the push rods 111 of the first air cylinder 11 and the second air cylinder push the cutter 6 to slide rightwards, the cutter 6 passes through the forming channel 31, the cutter edge 61 on the right side cuts extruded feed, and the cut feed falls to the lower portion of the collecting barrel 4. After the cutter 6 moves to the right end from the left end of the extrusion cylinder 3, the push rod 111 of the first air cylinder 11 and the second air cylinder pulls the cutter 6 to slide leftwards, the cutter 6 pushes the feed falling to the lower end of the collection cylinder 4 to move leftwards to the collection cylinder 4 in the moving process when cutting off the newly extruded feed, and finally the feed falls onto the conveyor belt 7 from the left end of the collection cylinder 4. Repeating above operation, the fodder that falls to the collecting vessel 4 bottom is promoted by cutter 6 right side, falls on conveyer belt 7 from collecting vessel 4 right-hand member, so the fodder can fall out from both ends about collecting vessel 4, and conveyer belt 7 drives fashioned fodder and leaves the extruder. The hot water in the heating cavity 33 flows out from the water outlet pipe 37 at the right end, after production is finished, the motor 13, the fan 15 and the air source 12 are turned off, and the hot water is stopped to be introduced into the heating cavity 33.

Example 2

As shown in fig. 4, the difference from embodiment 1 is that the heat insulating layer 32 in this embodiment is a heat insulating silicone sheet. The propelling component comprises an annular iron block 62 embedded in the cutter 6 and two annular electromagnets 16, and the two electromagnets 16 are fixed on the frame 1 by bolts and are respectively positioned at the two ends of the collecting cylinder 4. Two guide grooves 41 are formed in the inner wall of the collecting barrel 4, the two guide grooves 41 are located on two sides of the extruding barrel 3 respectively, and the guide grooves 41 are arranged along the axial direction of the collecting barrel 4. The slider 63 that can block into in the guide way 41 is had to integrated into one piece on the cutter 6 lateral wall, and the welding has two stopper 17 in the frame 1, avoids cutter 6 to drop from between collecting vessel 4 and the extrusion cylinder 3, and both ends about the limiting block 17 lies in collecting vessel 4 respectively.

Initially, the cutter 6 is at the left end of the collection cylinder 4. When the feed is cut, the electromagnet 16 at the right end is opened, the electromagnet 16 at the right end attracts the iron block 62, and the cutter 6 slides to the right side under the action of the electromagnetic force of the electromagnet 16 at the right end on the iron block 62 to cut the feed; the cutter 6 is stopped by stopper 17 on right side after moving to the collection section of thick bamboo 4 right-hand member, closes the electro-magnet 16 of right-hand member again, opens the electro-magnet 16 of left end, and the electro-magnet 16 of left end attracts iron plate 62, and cutter 6 slides left under the electro-magnet 16's of left end electromagnetic force effect, and until being stopped by left stopper 17, so two electro-magnets 16 are opened to continuous interval and can make cutter 6 slide left and right along extruding section of thick bamboo 3, constantly cut the fodder of extruding to release the collection section of thick bamboo 4 with the fodder.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.

Claims

1. The feed extruder comprises a rack, an extruding mechanism, a cutting mechanism and a conveying belt, wherein the extruding mechanism is rotationally connected with the rack; the extrusion mechanism is characterized by comprising an extrusion barrel, a fan and a motor, wherein the two ends of the extrusion barrel are sealed, the motor is used for driving the extrusion barrel to rotate, the motor is fixed on a rack, the fan is fixed on the extrusion barrel, a heating cavity close to the inner wall of the extrusion barrel and an air inlet cavity close to the outer wall of the extrusion barrel are arranged in the side wall of the extrusion barrel, the heating cavity is connected with a water inlet pipe and a water outlet pipe, and the air outlet end of the fan is communicated with the air inlet cavity; the extruding cylinder is provided with a plurality of tubular molding channels penetrating through the side wall of the extruding cylinder, each molding channel comprises a heating section penetrating through the heating cavity and a cooling section penetrating through the air inlet cavity, the diameter of the cooling section is larger than that of the heating section, and the side wall of the cooling section is provided with a plurality of air outlet holes communicated with the air inlet cavity; a feed hopper which is communicated with the extrusion cylinder and is fixedly connected with the rack is arranged outside the extrusion cylinder, and a collecting cylinder which is fixedly connected with the rack is sleeved outside the extrusion cylinder; the material cutting mechanism comprises a cutter positioned between the extruding cylinder and the collecting cylinder and a pushing assembly for pushing the cutter to slide along the axial direction of the extruding cylinder, and the conveyor belt is positioned below the collecting cylinder.

2. The feed extruder of claim 1 wherein the propulsion assembly comprises an air source fixed to the frame and a propulsion cylinder, the propulsion cylinder being in communication with the air source, a push rod of the propulsion cylinder being fixedly connected to the cutter.

3. The feed extruder as claimed in claim 1, wherein the inner wall of the collecting barrel is provided with two opposite guide grooves parallel to the axial direction of the collecting barrel, and the cutting knife is fixed with a slide block which is matched with the guide grooves and can slide along the guide grooves; the pushing assembly comprises an iron block embedded in the cutter and two annular electromagnets fixed on the rack, and the two electromagnets are respectively positioned at two ends of the collecting cylinder.

4. The feed extruder of claim 2 wherein the propulsion cylinder comprises a first cylinder and a second cylinder on either side of the barrel, and the air supply is in communication with both the first cylinder and the second cylinder.

5. A feed extruder as claimed in claim 3 or claim 4 wherein the barrel is provided with a thermally insulating layer secured to the inner wall thereof.

6. The feed extruder of claim 5 wherein the cutter has cylindrical blades fixed to both sides of the cutter, the blades having an inner diameter equal to the outer diameter of the barrel.

7. The feed extruder as claimed in claim 6, wherein a cover body connected with the extruder barrel in a rotating manner is arranged at the end part of one end of the extruder barrel, the cover body is fixedly connected with the frame, the end with the smaller diameter of the feed hopper is a discharge end, and the discharge end penetrates through the cover body.

8. The feed extruder of claim 7, wherein the barrel is provided with a stirring shaft coaxial with the barrel, the end of the stirring shaft penetrates through the barrel and is fixedly connected with the frame, and a spiral guide blade is fixed on the stirring shaft.