CN113119398A

CN113119398A - Injection mold capable of reducing material flow resistance for producing automatic steering wheel

Info

Publication number: CN113119398A
Application number: CN202110427060.1A
Authority: CN
Inventors: 万东方
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-16

Abstract

The invention discloses an injection mold capable of reducing material flow resistance for producing an automatic steering wheel, belonging to the technical field of automatic steering wheel production, and comprising a mold main body, wherein the bottom of the mold main body is detachably fixed with a mounting plate; the material flow resistance reducing device comprises a dispersing device arranged between a mounting plate and a base, and an exhaust flow dividing device is arranged on the outer side of the top of the base. The invention is provided with the dispersing device, so that the effect of leveling and extending the raw material hot melt is realized in the process of vibrating the mould main body up and down or left and right, the flow rate of the raw material hot melt is improved, bubbles in the raw material can be eliminated, the qualification rate of the steering wheel is improved, and the problems that the resistance of the raw material in the injection mould is overlarge in the flowing process, the filling speed of the raw material is low, and the steering wheel is inconvenient to produce in large batch are solved.

Description

Injection mold capable of reducing material flow resistance for producing automatic steering wheel

Technical Field

The invention relates to the technical field of automatic steering wheel production, in particular to an injection mold capable of reducing material flow resistance for automatic steering wheel production.

Background

The steering wheel is a wheel-shaped device for steering the driving direction of an automobile, a ship, an airplane and the like. The existing automatic steering wheel is usually produced by an injection mold, and the injection mold produced by the existing automatic steering wheel has the following defects when in use: the resistance of the raw materials in the existing injection mold is too large in the flowing process, so that the filling speed of the raw materials is low, the production quality and the production efficiency of the steering wheel are greatly reduced, and the mass production is not convenient. To this end, we propose an injection mold for producing an automatic steering wheel, which can reduce the material flow resistance.

Disclosure of Invention

The invention aims to provide an injection mold capable of reducing material flow resistance for producing an automatic steering wheel so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an injection mold for producing an automatic steering wheel, which can reduce material flow resistance, comprises,

the mould comprises a mould main body, wherein a mounting plate is detachably fixed at the bottom of the mould main body, bases are arranged below the mounting plate at intervals, and a mould input pipe communicated with a cavity in the mould main body is arranged in the center of the top of the mould main body;

material flows resistance reducing device, including setting up the dispersion devices between mounting panel and base, the base top outside is provided with exhaust diverging device, exhaust diverging device is including the support frame that is L shape, the support frame is provided with two at base top bilateral symmetry, and the mould main part is in between two support frames.

Further, dispersion devices includes horizontal slide rail one, the side symmetry is provided with two, two around the base top slide rail one all transversely be fixed with the guide arm in the slide rail one, two sets of the equal slip cap in guide arm outer wall left and right sides is equipped with slide rail assorted slider one, the equal cover in guide arm outer wall left and right sides is equipped with reset spring, and reset spring is in between slider one and a slide rail lateral part inner wall, and an elasticity telescopic link is fixed at slider top, and elasticity telescopic link top is fixed bottom the mounting panel.

Further, the front and back side backing plate fixed connection is passed through to bottom between the elastic telescopic rod, the base top just is in the position fixation between two sets of backing plates has the mount pad, and rotates through the pivot in the mount pad and be provided with the driving-disc, and the rear end of pivot runs through the mount pad rear side and fixes with the drive arrangement output of fixing at the mount pad rear side, the driving-disc top is fixed with the lug that has with mounting panel bottom activity butt, and the position that two sets of backing plate tops correspond the driving-disc all is fixed with lug matched with contact piece, the position that the side slide rail is one around just being in on the mounting panel top all transversely is fixed with slide rail two, and slide rail two is in the backing plate outside, the activity is provided with slide rail two in the slide rail two, and slide rail two bottoms are fixed through.

Further, it is two sets of the carriage top inner wall all slides and is provided with the exhaust piece, and two exhaust piece bilateral symmetry are fixed respectively and are set up in mould main part top left and right sides, and are two sets of exhaust piece one end all is connected with the reposition of redundant personnel piece, the exhaust piece is including fixing the piston barrel at mould main part top, the activity of piston barrel top is pegged graft and is had the piston rod, the piston rod top can be dismantled and be fixed with slider three, and slider three with fix three cooperation sliding connection of slide rail at carriage top inner wall.

Further, the piston rod bottom be fixed with piston barrel assorted piston, the fixed exhaust tube that pegs graft in piston barrel bottom has and is linked together with the mould main part inner mould chamber, piston barrel rear side outer wall bottom is provided with the blast pipe that is linked together, and all is provided with the check valve in exhaust tube and the blast pipe, and still is provided with in the blast pipe and filter the piece, the shunt tubes of pegging graft in mould input tube rear side are fixed including the slope to the reposition of redundant personnel piece, the shunt tubes is linked together with the mould input tube, the other end intercommunication of shunt tubes has a feeding section of thick bamboo, and a feeding section of thick bamboo is fixed at mould main part top.

Furthermore, a feed pipe communicated with the inner cavity of the die main body is fixedly inserted at the bottom of the feed cylinder, the top of the feed pipe is positioned at the bottom of one end of the flow dividing pipe far away from the input pipe of the mould, an annular convex edge is fixed at the position close to the inner wall of the feed pipe, a contact rod is movably inserted at the top of the feed cylinder, and the bottom of the contact rod is fixed with a block matched with the inner diameter of the feeding pipe, the top of the feeding cylinder is fixed with two groups of supporting blocks, a cam which is movably abutted against the top of the contact rod is arranged at the top between the two groups of supporting blocks through the rotation of the rotating rod, a spring is also arranged at the bottom of the outer wall of the contact rod, a hollow seat is fixed at the rear side of the piston cylinder, one end of the rotating rod close to the hollow seat movably penetrates through the side wall of the hollow seat, and a transmission rod is movably inserted at the bottom of the hollow seat, and the transmission rod and the rotating rod are meshed and connected through a bevel gear set, and the bottom of the transmission rod movably penetrates through the top of the exhaust pipe and is fixed with a follow-up impeller.

Compared with the prior art, the invention has the beneficial effects that:

1) the invention is provided with a dispersing device, a driving disc is driven to rotate by a driving device, the driving disc drives a lug, a mounting plate drives a mould main body to move up and down under the action of an elastic telescopic rod, and in the process of continuing to rotate the driving disc, the mounting plate drives the mould main body to move left and right in a reciprocating manner by intermittently contacting with contact blocks on two sides through the lug and further matching with a first sliding block, a return spring, a guide rod and a first sliding rail, so that the effect of leveling and extending the raw material hot melt is realized in the process of vibrating the mould main body up and down or vibrating the mould main body left and right, the flow rate of the raw material hot melt is improved, bubbles in the raw material can be eliminated, the qualification rate of the steering wheel is improved, and the problems that the resistance of the raw material in an injection mould is overla;

2) according to the invention, the exhaust part is arranged on the inner wall of the top of the support frame, and the exhaust part drives the mounting plate to enable the mould main body to move up and down through the support frame and the piston rod in the process that the dispersion device drives the mounting plate to enable the piston to move up and down in the piston cylinder, so that air in a cavity in the mould main body is sucked into the piston cylinder and is exhausted outwards through the exhaust pipe, on one hand, the air resistance of raw materials when the raw materials enter the cavity in the mould main body is greatly reduced, on the other hand, the cavity in the mould main body forms a certain vacuum, so that the generation of bubbles in the raw materials is reduced, and the quality;

3) the split-flow part is additionally arranged, when the split-flow pipe needs to be used, the electromagnetic valve in the split-flow pipe is opened, so that raw materials entering the input pipe of the die can enter the feeding cylinder through the split-flow pipe, then enter the feeding pipe, and then enter the cavity in the main body of the die, the resistance of the raw materials entering the die is further reduced, meanwhile, air flow is discharged from the exhaust pipe, the follow-up impeller can be driven to rotate, the follow-up impeller drives the transmission rod to rotate, the transmission rod drives the rotating rod through the bevel gear set to rotate the cam, the cam drives the contact rod to reciprocate up and down, the blocking block is driven to reciprocate up and down, the intermittent feeding opening and closing are realized, the raw materials entering the die can be conveniently and better extruded to a certain extent while the raw materials.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a top perspective view of the dispenser configuration of the present invention;

FIG. 3 is a perspective view of the exhaust manifold assembly of the present invention;

FIG. 4 is a perspective cross-sectional view of the vent structure of the present invention;

fig. 5 is a perspective cross-sectional view of the diverter structure of the present invention.

In the figure: 1. a mold body; 2. mounting a plate; 3. a base; 4. a mold input tube; 5. a material flow resistance reducing device; 51. a dispersing device; 511. a first slide rail; 512. a guide bar; 513. an elastic telescopic rod; 514. a drive device; 515. a drive disc; 516. a bump; 517. a second slide rail; 518. a telescopic support column; 52. an exhaust gas flow divider; 521. a support frame; 522. an exhaust member; 5221. a piston cylinder; 5222. a piston rod; 5223. an air exhaust pipe; 5224. an exhaust pipe; 523. a flow divider; 5231. a shunt tube; 5232. a feeding cylinder; 5233. a feed pipe; 5234. an annular flange; 5235. a cam; 5236. a hollow seat; 5237. and a transmission rod.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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

Referring to the drawings, the present invention provides an injection mold for producing an automatic steering wheel (in which electrical components are connected to an external power source through wires) capable of reducing material flow resistance, comprising,

the die comprises a die main body 1, wherein a mounting plate 2 is detachably fixed at the bottom of the die main body 1 and can be fixed by screws or bolts, bases 3 are arranged below the mounting plate 2 at intervals, a die input pipe 4 communicated with a cavity in the die main body 1 is arranged in the center of the top of the die main body 1, and the die input pipe 4 is used for enabling raw materials to enter the cavity in the die main body 1 for forming;

material flow resistance reducing device 5, including setting up dispersion devices 51 between mounting panel 2 and base 3, carry out the effect that the flattening extends to the hot melt of raw materials, improve the velocity of flow of the hot melt of raw materials, and can eliminate the inside bubble of hot melt, can improve the qualification rate of steering wheel, it is too big at flow in-process resistance to have solved the inside raw materials of injection mold, the 3 top outsides of base are provided with exhaust diverging device 52, the air resistance that receives when exhaust diverging device 52 reduces the raw materials and enters, further reduce the resistance, and the production of inside bubble has further been prevented, exhaust diverging device 52 is including the support frame 521 that is L shape, support frame 521 is provided with two at 3 top bilateral symmetry of base, and mould main part 1 is in between two support frames 521.

Referring to fig. 2, the dispersing device 51 includes a first transverse slide rail 511, two first slide rails 511 are symmetrically disposed on the front and rear sides of the top of the base 3, guide rods 512 are transversely fixed in the first two slide rails 511, first sliders matched with the first slide rails 511 are slidably sleeved on the left and right sides of the outer walls of the two groups of guide rods 512, the first sliders can slide left and right on the outer walls of the guide rods 512, return springs are respectively sleeved on the left and right sides of the outer walls of the guide rods 512, the return springs are located between the first sliders and the inner walls of the side portions of the first slide rails 511, one end of each return spring is fixed to the first slider, the other, the first sliding block for driving the movement to reset, the top of the first sliding block is fixed with an elastic telescopic rod 513, the elastic telescopic rod 513 is composed of a telescopic rod and a spring, the application in the field is wide, and will not be described in detail herein, and the top of the elastic expansion link 513 is fixed to the bottom of the mounting plate 2, so as to enable the upward mounting plate 2 to be reset downward;

referring to fig. 2, the bottom of the front and rear elastic telescopic rods 513 is fixedly connected through a pad, the pad is fixed to the outer wall of one non-telescopic side of the elastic telescopic rods 513, a mounting seat is fixed to the top of the base 3 and located between two sets of pads, a driving disk 515 is rotatably disposed in the mounting seat through a rotating shaft, the rear end of the rotating shaft penetrates through the rear side of the mounting seat and is fixed to the output end of a driving device 514 fixed to the rear side of the mounting seat, the driving device 514 can be a motor, a protruding block 516 movably abutted to the bottom of the mounting plate 2 is fixed to the top of the driving disk 515, the end of the protruding block 516 is arc-shaped, the protruding block 516 rotates to make the mounting plate 2 upward, so that the elastic telescopic rods 513 extend, contact blocks matched with the protruding blocks 516 are fixed to the tops of two sets of pads corresponding to the positions of the driving disk 515, the protruding, lug 516 left or right farthest distance, mounting panel 2 can not contact support frame 521, 2 top left and right sides of mounting panel and be in all transversely be fixed with two slide rails 517 around the position between the side slide rail 511, and two slide rails 517 are in the backing plate outside, two slide rail 517 internalizations are provided with two sliders, two sliders and two 517 cooperations of slide rail make things convenient for mounting panel 2 to remove about, and two bottoms of slider are fixed with 3 tops of base through flexible support column 518, flexible support column 518 makes things convenient for mounting panel 2 to reciprocate.

Example 2

Referring to fig. 3 and 4, the inner walls of the tops of the two groups of supporting frames 521 are both provided with air exhausting members 522 in a sliding manner, the two air exhausting members 522 are conveniently matched with the mounting plate 2 to drive the mold main body 1 to move left and right in a sliding manner, the two air exhausting members 522 are respectively and fixedly arranged on the left side and the right side of the top of the mold main body 1 in a bilateral symmetry manner, one end of each of the two groups of air exhausting members 522 is connected with a flow dividing member 523, the flow dividing member 523 further reduces resistance to raw materials entering through flow dividing, each air exhausting member 522 comprises a piston barrel 5221 fixed on the top of the mold main body 1, the top of the piston barrel 5221 is movably inserted with a piston rod 5222, the top of the piston rod 5222 is detachably fixed with a third sliding block, the;

referring to fig. 4, a piston matching with the piston barrel 5221 is fixed at the bottom end of the piston rod 5222, and when the mounting plate 2 drives the mold body 1 to move up and down, the piston is driven by the support frame 521 and the piston rod 5222 to move up and down in the piston barrel 5221, an air exhaust pipe 5224 communicating with the cavity in the mold body 1 is fixed at the bottom of the piston barrel 5221, the air exhaust pipe 5223 is used for exhausting the air exhausted from the cavity in the mold body 1, the air exhaust pipe 5223 and the air exhaust pipe 5224 are both provided with check valves therein, the check valve in the air exhaust pipe 5223 prevents the exhausted air from being exhausted from the air exhaust pipe 5223, the check valve in the air exhaust pipe 5224 prevents the outside air from entering from the air exhaust pipe 5224, and the air exhaust pipe 5224 is also provided with a filter element, which is widely used in the field, for example, a filter screen can be adopted, the flow dividing piece 523 comprises a flow dividing pipe 5231 obliquely and fixedly inserted at the rear side of the die input pipe 4, the flow dividing pipe 5231 enables part of raw materials to enter a cavity in the die body 1 from the flow dividing pipe 5231 when the raw materials enter the cavity in the die body 1 through the flow dividing pipe 5231, an electromagnetic valve is further arranged in the flow dividing pipe 5231 and can be closed when the raw materials are not used, the flow dividing pipe 5231 is communicated with the die input pipe 4, the other end of the flow dividing pipe 5231 is communicated with a feeding barrel 5232, and the feeding barrel 5232 is fixed at the top of the die body 1.

The rest of the structure was the same as in example 2

Compare in embodiment 1, embodiment 2 is provided with exhaust 522 at support frame 521 top inner wall, exhaust 522 drives the in-process that mounting panel 2 made mould main part 1 up-and-down motion at dispersion devices 51, and then through support frame 521, piston rod 5222 drives the piston and reciprocates in piston cylinder 5221, thereby make the air of the die cavity in the mould main part 1 pumped to in the piston cylinder 5221, and outwards discharge through blast pipe 5224, on the one hand greatly reduced the air resistance that receives when the raw materials gets into the die cavity in the mould main part 1, on the other hand makes the die cavity in the mould main part 1 form certain vacuum, thereby the production of bubble in the raw materials has been reduced, improve the fashioned quality of steering wheel.

Example 3

Referring to fig. 5, a feed pipe 5233 communicated with a cavity in the mold body 1 is fixedly inserted into the bottom of the feed cylinder 5232, the feed pipe 5233 allows a raw material entering the feed cylinder 5232 to enter the cavity in the mold body 1, the top of the feed pipe 5233 is positioned at the bottom of one end of the shunt pipe 5231 away from the mold input pipe 4, so that the raw material flowing out of the shunt pipe 5231 can enter the feed pipe 5233, an annular convex edge 5234 is fixed at a position on the inner wall of the feed pipe 5233, the inner diameter of the annular convex edge 5234 is smaller than that of the blocking block, the blocking block contacts the top of the annular convex edge 5234 downwards, a contact rod is movably inserted into the top of the feed cylinder 5232, the blocking block is fixed at the bottom of the contact rod and matched with the inner diameter of the feed pipe 5233, the blocking block plays a role in blocking, so as to realize intermittent open flow, two groups of support blocks are fixed at the top of, the top of the contact rod is movably abutted with the cam 5235 through a ball, a spring (not shown in the figure) is further arranged at the bottom of the outer wall of the contact rod, one end of the spring is fixed with the bottom of the outer wall of the contact rod, the other end of the spring is fixed with the inner wall of the top of the feeding cylinder 5232 to enable the contact rod to reciprocate up and down, a hollow seat 5236 is fixed at the rear side of the piston cylinder 5221, one end of a rotating rod, close to the hollow seat 5236, movably penetrates through the side wall of the hollow seat 5236, a transmission rod 5237 is movably inserted at the bottom of the hollow seat 5236, the transmission rod 5237 and the rotating rod are connected in a meshing manner through a bevel gear set (not shown in the figure), the bevel gear set is positioned in the hollow seat 5236 and is two sets of meshed bevel gears, a follow-up impeller is movably penetrated through the top of the exhaust pipe 5224 at.

The rest of the structure was the same as in example 2

Compared with the embodiment 2, in the embodiment 3, the flow dividing member 523 is additionally arranged, when the flow dividing pipe 5231 needs to be used, the electromagnetic valve in the flow dividing pipe 5231 is opened, so that the raw material entering the input pipe 4 of the mold can enter the feeding cylinder 5232 through the flow dividing pipe 5231, then enter the feeding pipe 5233, and then enter the cavity in the main body 1 of the mold, so that the resistance to the raw material entering is further reduced, meanwhile, the air flow is discharged from the exhaust pipe 5224 and can drive the follower impeller to rotate, and then the follower impeller drives the transmission rod 5237 to rotate, the transmission rod 5237 drives the rotating rod through the bevel gear set to rotate the cam 5235, the cam 5235 enables the contact rod to reciprocate up and down, so that the block is driven to reciprocate up and down, the intermittent feeding opening and closing is realized, a certain extrusion effect on the raw material entering from the feeding pipe 5233 is conveniently and better, and the generation.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Automatic drive steering wheel production is with injection mold that can reduce material and flow resistance, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the die comprises a die main body (1), wherein a mounting plate (2) is detachably fixed at the bottom of the die main body (1), bases (3) are arranged below the mounting plate (2) at intervals, and a die input pipe (4) communicated with a cavity in the die main body (1) is arranged in the center of the top of the die main body (1);

material flow resistance reducing device (5), including dispersion devices (51) of setting between mounting panel (2) and base (3), base (3) top outside is provided with exhaust diverging device (52), exhaust diverging device (52) including being support frame (521) of L shape, and support frame (521) are provided with two in base (3) top bilateral symmetry, and mould main part (1) is in between two support frames (521).

2. The injection mold for producing an automatic steering wheel capable of reducing the material flow resistance according to claim 2, characterized in that: dispersing device (51) is including horizontal slide rail (511), slide rail (511) side symmetry is provided with two around base (3) top, all transversely be fixed with guide arm (512) in two slide rail (511), the equal slip cap in two sets of guide arm (512) outer wall left and right sides is equipped with slide rail (511) assorted slider one, the equal cover in guide arm (512) outer wall left and right sides is equipped with reset spring, reset spring is in between slider one and slide rail (511) lateral part inner wall, a slider top is fixed with elasticity telescopic link (513), and elasticity telescopic link (513) top is fixed with mounting panel (2) bottom.

3. The injection mold for producing an automatic steering wheel capable of reducing the material flow resistance according to claim 3, characterized in that: the bottoms of the front and rear elastic telescopic rods (513) are fixedly connected through backing plates, a mounting seat is fixed at the top of the base (3) and between the two sets of backing plates, a driving disk (515) is rotatably arranged in the mounting seat through a rotating shaft, the rear end of the rotating shaft penetrates through the rear side of the mounting seat and is fixed with the output end of a driving device (514) fixed at the rear side of the mounting seat, a lug (516) movably abutted against the bottom of the mounting plate (2) is fixed at the top of the driving disk (515), contact blocks matched with the convex blocks (516) are fixed at the positions, corresponding to the driving disc (515), of the tops of the two groups of backing plates, a second sliding rail (517) is transversely fixed at the left side and the right side of the top of the mounting plate (2) and between the first sliding rail (511) at the front side and the rear side, and the second sliding rail (517) is positioned at the outer side of the backing plate, a second sliding block is movably arranged in the second sliding rail (517), and the bottom of the second sliding block is fixed with the top of the base (3) through a telescopic supporting column (518).

4. The injection mold for producing an automatic steering wheel capable of reducing the material flow resistance according to claim 4, characterized in that: two sets of support frame (521) top inner wall all slides and is provided with exhaust piece (522), two exhaust piece (522) bilateral symmetry are fixed respectively and are set up in the left and right sides in mould main part (1) top, two sets of exhaust piece (522) one end all are connected with reposition of redundant personnel piece (523), exhaust piece (522) are including fixing piston cylinder (5221) at mould main part (1) top, piston cylinder (5221) top activity is pegged graft and is had piston rod (5222), piston rod (5222) top can be dismantled and be fixed with slider three, and slider three with fix three cooperation sliding connection of slide rail at support frame (521) top inner wall.

5. The injection mold for producing an automatic steering wheel capable of reducing the material flow resistance according to claim 5, characterized in that: the bottom end of the piston rod (5222) is fixedly provided with a piston matched with the piston cylinder (5221), the bottom of the piston cylinder (5221) is fixedly inserted with an exhaust pipe (5223) communicated with a cavity in the die body (1), the bottom of the outer wall of the rear side of the piston cylinder (5221) is provided with an exhaust pipe (5224) communicated with the cavity, the exhaust pipe (5223) and the exhaust pipe (5224) are internally provided with one-way valves, the exhaust pipe (5224) is internally provided with a filter element, the flow dividing element (523) comprises a flow dividing pipe (5231) which is obliquely and fixedly inserted at the rear side of the die input pipe (4), the flow dividing pipe (5231) is communicated with the die input pipe (4), the other end of the flow dividing pipe (5231) is communicated with a feeding cylinder (5232), and the feeding cylinder (5232) is fixed at.

6. The injection mold for producing an automatic steering wheel capable of reducing the material flow resistance according to claim 6, characterized in that: a feed pipe (5233) communicated with an inner cavity of the die body (1) is fixedly inserted at the bottom of the feed cylinder (5232), the top of the feed pipe (5233) is positioned at the bottom of the shunt pipe (5231) far away from the end of the die input pipe (4), an annular convex edge (5234) is fixed at the upper position of the inner wall of the feed pipe (5233), a contact rod is movably inserted at the top of the feed cylinder (5232), a plug block matched with the inner diameter of the feed pipe (5233) is fixed at the bottom of the contact rod, two groups of support blocks are fixed at the top of the feed cylinder (5232), a cam (5235) movably abutted against the top of the contact rod is rotatably arranged at the top between the two groups of support blocks through a rotating rod, a spring is further arranged at the bottom of the outer wall of the contact rod, a hollow seat (5236) is fixed at the rear side of the piston cylinder (5221), one end of the rotating rod, which is close to the hollow seat (52, and the transmission rod (5237) is meshed and connected with the rotating rod through a bevel gear set, and the bottom of the transmission rod (5237) movably penetrates through the top of the exhaust pipe (5224) and is fixed with a follow-up impeller.