CN110920024B - Extrusion feeding device for high-temperature-resistant film - Google Patents

Abstract

The invention relates to the field of plastic film processing, in particular to an extrusion feeding device for a high-temperature-resistant film, which comprises a spiral feeder, wherein the spiral feeder comprises an extrusion cylinder and a screw rod, one end of the screw rod is positioned in the extrusion cylinder, the other end of the screw rod is positioned on the outer side of the extrusion cylinder, the screw rod is rotationally connected to the extrusion cylinder, the extrusion cylinder is provided with a feeding cylinder, the extrusion cylinder is connected with an exhaust pipe and a drain pipe, the outer wall of the extrusion cylinder is provided with a heater, the screw rod comprises a smooth part and two sections of spiral parts, the smooth part is positioned between the two sections of spiral parts, the inside of the screw rod is hollow, the smooth part; the part of the screw rod, which is positioned outside the extruding cylinder, is provided with an air inlet hole, and the outside of the extruding cylinder is provided with an inflating mechanism for intermittently inflating the air inlet hole. The scheme enables more moisture and air in the raw materials to be discharged in the pushing process.

Description

Extrusion feeding device for high-temperature-resistant film

Technical Field

The invention relates to the field of plastic film processing, in particular to an extrusion feeding device for a high-temperature-resistant film.

Background

Plastic films are the raw material used to make plastic bags, which can be used to make external packaging plastic bags. The existing plastic film needs to push the raw material to the die head by using the spiral feeder during manufacturing, and the raw material is continuously compacted in the spiral feeder, so that gas in the raw material can be discharged, meanwhile, the raw material is heated by the heater on the outer wall of the spiral feeder, so that the temperature of the raw material is increased, the heat absorption of the raw material is changed into a high elastic state from a glass state, and finally the raw material is changed into a viscous state, so that the raw material is completely plasticized, and the film can be extruded from the die head.

In the process of pushing the raw materials in the prior art, the raw materials are gradually compacted, moisture and gas contained in the raw materials can be discharged outwards, and the spiral feeder is connected with the drain pipe and the exhaust pipe, so that the water and the gas can be discharged through the drain pipe and the exhaust pipe respectively. Because the raw materials can be compacted by the screw in the screw feeder in the pushing process, although the raw materials can discharge moisture and gas through extrusion, the pores between the compacted raw materials are small, so that the moisture and gas are not favorably discharged, and the discharge of the moisture and the gas on the raw materials is limited. Therefore, the discharge capacity of moisture and gas during the pushing of the raw material needs to be further improved.

Disclosure of Invention

The invention aims to provide an extrusion feeding device of a high-temperature-resistant film, so that more moisture and air in raw materials are discharged in the pushing process of the raw materials.

In order to achieve the purpose, the technical scheme of the invention is as follows: the extrusion feeding device of the high-temperature-resistant film comprises a spiral feeder, wherein the spiral feeder comprises an extrusion cylinder and a screw, one end of the screw is positioned in the extrusion cylinder, the other end of the screw is positioned outside the extrusion cylinder, the screw is rotationally connected to the extrusion cylinder, the extrusion cylinder is provided with a feeding cylinder, the extrusion cylinder is connected with an exhaust pipe and a drain pipe, the outer wall of the extrusion cylinder is provided with a heater, the screw comprises a smooth part and two sections of spiral parts, the smooth part is positioned between the two sections of spiral parts, the inside of the screw is hollow, the smooth part is provided with an air hole, and the smooth part is fixedly connected with an; the part of the screw rod, which is positioned outside the extruding cylinder, is provided with an air inlet hole, and the outside of the extruding cylinder is provided with an inflating mechanism for intermittently inflating the air inlet hole.

The working principle of the scheme is as follows: the feeding cylinder is used for putting into the raw materials and extrudes a section of thick bamboo, the screw rod is at the rotation in-process, the screw rod conveys the raw materials, the heater is arranged in heating the raw materials that extrudes a section of thick bamboo, because the screw rod includes smooth portion and two sections screw portions, the screw portion is for being equipped with helical blade's position, smooth portion is for not having helical blade's position, the screw rod is in to raw materials propelling movement in-process like this, the raw materials extrudees through the screw portion earlier, the raw materials is after heating and extrusion, moisture and the gas that contains in the raw materials will release, the gas and the moisture of release are respectively through blast pipe and drain pipe discharge. After the raw material is extruded by the first section of spiral part, the raw material is contacted with the smooth part of the screw, and because the smooth part is not provided with the spiral blade, the raw material is not extruded by the spiral blade any more, meanwhile, the inflating mechanism intermittently introduces gas into the screw, when the gas is introduced into the screw, the gas in the screw enters the expansion bag through the air hole, so that the expansion bag expands and becomes large, when the gas is not introduced into the screw, the gas in the screw is discharged from the air inlet, the gas quantity in the expansion bag is reduced, and the expansion bag contracts, so that the compacted raw material becomes loose under the alternate progression of the contraction and expansion of the expansion bag, the pores among the raw materials become large, the diffusion of the gas and the moisture is more facilitated, and the situation that the raw material is in a compacted state and is not beneficial to the discharge of the moisture and the. Along with the rotation of screw rod, the raw materials can be by the propelling movement to another section spiral portion on, the spiral portion makes the raw materials of moisture and gas exhaust compacted once more, has guaranteed the quality when the raw materials is extruded, relatively loose when avoiding the raw materials to extrude.

When the technical scheme is adopted, the intermittent shrinkage and expansion of the expansion bag can loosen the compacted raw materials, so that the discharge of moisture and gas in the raw materials is facilitated, and the moisture and gas in the raw materials are discharged more cleanly. Because there is not helical blade on the smooth portion, consequently lie in the raw materials on the smooth portion and rely on the promotion of the raw materials behind to move forward, and the expansion bag is softer, and when the expansion bag contracts, the expansion bag can not occupy too big space, and the expansion bag can not cause too big hindrance for the removal of raw materials, does benefit to the raw materials and removes in extruding the section of thick bamboo.

Furthermore, filter screens are arranged between the exhaust pipe and the extrusion cylinder and between the drain pipe and the extrusion cylinder. The filter screen can play filterable effect, and the filter screen can make gas and moisture pass through, can't make the raw materials pass through, has avoided the raw materials to enter into drain pipe and blast pipe and cause the leakage of raw materials.

Further, one side that the filter screen kept away from the extrusion cylinder is equipped with prevents stifled unit, prevents stifled unit including the book piece that can straighten, and the book piece has elasticity, and one side fixedly connected with burr that the roll piece expanded back and pasted mutually with the filter screen, the opposite side fixedly connected with of roll piece extend the area, and the one end that the roll piece was kept away from in the extension area is connected with inflating mechanism, and inflating mechanism aerifys to the intermittent type nature in the extension area. Therefore, when the inflating mechanism does not fill gas into the extension belt, the rolling sheet is in a rolling state under the action of the elasticity of the rolling sheet, when the inflating mechanism fills gas into the extension belt, the extension belt is filled with gas and extends under the action of the gas, the extension belt overcomes the elasticity of the rolling sheet to unfold the rolling sheet when extending, and the burr is fixedly connected to the side, which is attached to the filter screen, of the rolling sheet after the rolling sheet is unfolded, so that the burr on the rolling sheet is inserted into the filter hole of the filter screen. After the inflation is stopped, the gas can not continuously enter the extension belt, the gas leakage in the extension belt is reduced, the extension belt contracts, and the rolling piece is rolled up under the action of the elasticity of the rolling piece. Fill gas in to the extension area through relapse intermittent type, roll up the piece and will be continuous stretch out and roll up, like this the burr can be relapse insert the filtration pore of filter screen, the burr can be released the raw materials of adhesion in the filtration pore repeatedly, has realized the cleanness of filter screen to avoid the raw materials to plug up the filtration pore of filter screen, do benefit to the filter effect of guaranteeing the filter screen.

Further, the inflating mechanism comprises a piston cylinder, a piston is connected in the piston cylinder in a sliding mode, a cylinder used for pushing the piston to move in a reciprocating mode is arranged on the outer side of the piston cylinder, a screw rod penetrates through the piston cylinder, two air outlets which are respectively communicated with the two extension belts are formed in the side wall of the piston cylinder, an air inlet pipe is fixedly connected to the air inlet of the screw rod, two connecting rods are fixedly connected to the screw rod, a blocking block which is attached to the inner wall of the piston cylinder is fixedly connected to the end portion, away from the screw rod, of each connecting rod, the air outlets are blocked by the blocking blocks in an intermittent mode, an arc-shaped blocking strip is fixedly connected to; the air outlet and the air inlet pipe are alternatively blocked. The air outlet and the air inlet pipe are alternatively blocked, namely the screw drives the air inlet pipe and the blocking block to rotate together in the rotation process of the screw, when the air outlet is blocked by the blocking block, the air inlet pipe cannot be attached to the blocking strip, and the air inlet pipe cannot be blocked by the blocking strip; when the intake pipe was stopped up by the closure strip, the gas outlet can not be stopped up to the closure block, just say that gas outlet and intake pipe can not be stopped up simultaneously. Therefore, the air cylinder is used for driving the piston to vertically reciprocate in the piston cylinder, the air inlet pipe cannot be attached to the blocking strip and cannot be blocked by controlling the reciprocating speed and the frequency of the piston and the rotating speed of the screw rod in the rotating process of the screw rod, the piston finishes up-and-down reciprocating movement at the moment, when the piston moves downwards, the piston presses air into the screw rod, the expansion bag on the screw rod expands, then the piston moves upwards, the piston sucks the air in the screw rod out, and the expansion bag on the screw rod contracts; when the air inlet pipe rotates to one side of the blocking strip, the air inlet pipe is blocked by the blocking strip, the blocking block is separated from the air outlet, the air outlet is opened, the piston completes up-and-down reciprocating movement again, when the piston moves downwards, the piston presses air into the air outlet, the air enters the extension belt from the air outlet, the winding sheet extends, when the piston moves upwards, the piston sucks the air out of the extension belt, and the winding sheet is wound under the action of elasticity of the winding sheet. From this, realized the flexible of roll sheet and the expansion and contraction of inflation bag through this scheme is automatic to be gone on in turn, and the mechanism is aerifyd to the two sharing, need not manually to gas control so that gas enters into respectively and extends area and inflation bag in, easy operation is convenient, degree of automation is high.

Furthermore, one end of the screw rod, which is positioned outside the extrusion cylinder, is connected with a driving mechanism, the driving mechanism comprises a motor and a speed reducer, the motor is connected with the speed reducer, and the speed reducer is connected with the screw rod. Therefore, the motor is used for providing power for rotating the screw, and the rotating speed of the screw can be slower through the speed reducer.

Further, an exhaust fan is connected to the exhaust pipe. Therefore, the exhaust fan can suck out the gas entering the exhaust pipe, and the gas in the extrusion cylinder can enter the exhaust pipe more conveniently.

Furthermore, one end of the extrusion cylinder, which is far away from the driving mechanism, is conical, and the small end of the conical shape is far away from the extrusion cylinder. Thereby, the raw material can be slowly extruded from the extruding cylinder.

Furthermore, a fixed rod is fixedly connected between the blocking strip and the piston cylinder. From this, can support the putty strip through the dead lever.

Further, the bottom of the drain pipe is connected with a valve. The valve is convenient for controlling whether the water in the water drainage pipe is discharged or not.

Further, the inflation mechanism is an air pump. The air pump is used for inflating, and the structure is simpler and more convenient.

Drawings

FIG. 1 is a schematic sectional view in a forward direction of a high temperature resistant film extrusion feeder in example 1;

FIG. 2 is an enlarged view of the roll sheet in the exhaust pipe;

FIG. 3 is a schematic sectional view in a forward direction of a high temperature resistant film extrusion feeder in example 2;

fig. 4 is a left side view of the closure strip of fig. 3.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an extrusion barrel 1, a filter screen 2, an exhaust pipe 3, an exhaust fan 4, a drain pipe 5, a screw 6, a spiral part 7, a smooth part 8, an expansion bag 9, a feeding barrel 10, a speed reducer 11, a motor 12, an anti-blocking unit 13, a first air pump 14, a second air pump 15, burrs 16, a rolling sheet 17, an extension belt 18, a cylinder 19, a piston 20, a blocking block 21, an air inlet pipe 22, a blocking strip 23 and an air outlet 24.

Example 1

Substantially as shown in figures 1-2: the extrusion feeding device of the high-temperature-resistant film comprises a spiral feeder, wherein the spiral feeder comprises an extrusion cylinder 1 and a screw rod 6, the right end of the extrusion cylinder 1 is conical, the conical small end is the right end, and the left end of the extrusion cylinder 1 is closed. The right end of the screw rod 6 is positioned in the extrusion cylinder 1, the left end of the screw rod 6 is positioned on the outer side of the extrusion cylinder 1, the outer side of the left end of the extrusion cylinder 1 is provided with a driving mechanism, the driving mechanism in the embodiment comprises a motor 12 and a speed reducer 11, the motor 12 is connected with the speed reducer 11, and an output shaft of the speed reducer 11 is connected with the left end of the screw rod 6 through a flat key. The screw rod 6 is connected on the left end of the extrusion barrel 1 in a rotating mode through a bearing, the screw rod 6 comprises a smooth part 8 (no spiral blade is arranged on the screw rod 6) and two sections of spiral parts 7 (spiral blades are arranged on the screw rod 6), the smooth part 8 is located between the two sections of spiral parts 7, the inside of the screw rod 6 is hollow, a plurality of air holes are formed in the smooth part 8, and an expansion bag 9 communicated with the air holes is bonded on the smooth part 8. The extrusion cylinder 1 is provided with a feeding cylinder 10 which is communicated with each other, and the feeding cylinder 10 is positioned above the left end of the extrusion cylinder 1 and welded on the extrusion cylinder 1. The last welding of extrusion cylinder 1 has blast pipe 3 and drain pipe 5, and blast pipe 3 is located the top of extrusion cylinder 1, and drain pipe 5 is located the below of extrusion cylinder 1, and the bottom of drain pipe 5 is sealed, and the bottom of drain pipe 5 is equipped with the valve to whether the water in the control drain pipe 5 is discharged. The filter screen 2 is clamped between the exhaust pipe 3 and the extrusion cylinder 1 and between the drain pipe 5 and the extrusion cylinder 1. An exhaust fan 4 is arranged above the exhaust pipe 3, and a pipeline is connected between the exhaust fan 4 and the exhaust pipe 3. The outer wall of the extrusion cylinder 1 is provided with a heater (not shown in the figure), which can be a heating wire, so as to heat the raw material in the extrusion cylinder 1. The part of the screw 6, which is located outside the extrusion cylinder 1, is provided with an air inlet hole, the outside of the extrusion cylinder 1 is provided with an inflation mechanism for intermittently inflating the air inlet hole, the inflation mechanism in the embodiment comprises a first air pump 14 and a second air pump 15, the first air pump 14 is fixed on the left end of the screw 6 through a screw, the first air pump 14 is communicated with the air inlet hole at the left end of the screw 6, and the first air pump 14 intermittently injects air into the air inlet hole.

One side that the filter screen 2 in drain pipe 5 and the blast pipe 3 kept away from and extrude a section of thick bamboo 1 all is equipped with prevents stifled unit 13, combine fig. 2 to show, prevent stifled unit 13 including the book piece 17 that the metal that can straighten made, book piece 17 has elasticity, the side of rolling up piece 17 pastes with filter screen 2 after rolling up piece 17 expandes, one side welding that the roll piece 17 expandes back and filter screen 2 pasted has burr 16, the opposite side of rolling up piece 17 bonds and has extension area 18, extension area 18 in this embodiment is made for rubber, be equipped with the air cavity in the extension area 18. Through holes for allowing the extension belt 18 to pass through are formed in the left side wall of the drain pipe 5 and the left side wall of the exhaust pipe 3, one end of the extension belt 18, which is far away from the winding sheet 17, is connected with a second air pump 15, and the second air pump 15 intermittently inflates air to the extension belt 18.

The specific implementation process is as follows: the raw materials are put into the extrusion cylinder 1 through the feeding cylinder 10, the motor 12 is started, the motor 12 drives the screw rod 6 to rotate through the speed reducer 11, the screw rod 6 conveys the raw materials from left to right in the rotating process of the screw rod 6, and meanwhile, the heater heats the raw materials in the extrusion cylinder 1. In the process of pushing the raw materials, the raw materials are conveyed by the left spiral part 7, the raw materials are extruded by the left spiral part 7, the raw materials are heated and extruded, moisture and gas in the raw materials are released, and the released gas and moisture are discharged through the exhaust pipe 3 and the drain pipe 5 respectively. After the material has been extruded through the left-hand screw portion 7, the material comes into contact with the smooth portion 8 of the screw 6, since the smooth portion 8 has no spiral blade, the raw material is not extruded by the spiral blade, and the first air pump 14 intermittently supplies air to the screw 6, when gas is introduced into the screw 6, the gas in the screw 6 enters the expansion capsule 9 through the gas hole, so that the expansion bag 9 expands and grows, when the gas is stopped to be introduced into the screw 6, the gas does not enter the screw 6 any more, the gas in the screw 6 is automatically discharged through the gas inlet hole, the gas in the expansion bag 9 is discharged through the screw 6, the gas quantity in the expansion bag 9 is reduced, the expansion bag 9 contracts, therefore, the compacted raw materials are loosened under the alternate process of shrinkage and expansion of the expansion bag 9, the pores among the raw materials are enlarged, the diffusion of gas and moisture is facilitated, and the situation that the raw materials are in a compacted state and are not beneficial to the discharge of the moisture and the gas is avoided. Along with the rotation of screw rod 6, the raw materials that is located inflation bag 9 department can receive the promotion of the right side of the raw materials that gets into from the left side to on moving the spiral portion 7 on right side, spiral portion 7 makes moisture and gaseous clean raw materials by the compaction once more, guaranteed the quality when raw materials extrude, relatively loose when avoiding raw materials to extrude.

Meanwhile, the second air pump 15 intermittently fills air into the extension belt 18, when the second air pump 15 does not fill air into the extension belt 18, the roll sheet 17 is in a rolling state under the action of the elasticity of the roll sheet 17, when the second air pump 15 fills air into the extension belt 18, the extension belt 18 is filled with air, the extension belt 18 extends under the action of the air, the roll sheet 17 is unfolded by overcoming the elasticity of the roll sheet 17 when the extension belt 18 extends, and the burr 16 is adhered to one side, which is adhered to the filter screen 2, of the roll sheet 17 after the roll sheet 17 is unfolded, so that the burr 16 on the roll sheet 17 is inserted into the filter holes of the filter screen 2, and the removal of the adhered raw materials on the filter holes on the filter screen 2 is realized. When the air is stopped to be introduced into the extension belt 18, the air is not continuously introduced into the extension belt 18, the air in the extension belt 18 leaks from the air inlet end, the force on the extension belt 18 is reduced, the rolling sheet 17 is automatically rolled up under the action of the self elastic force, and the rolling sheet 17 drives the burrs 16 to be pulled out of the filter holes of the filter screen 2. From this, through filling gas in the extension area 18 to the intermittent type nature of relapse, roll up piece 17 will be continuous to be stretched out and roll up, like this burr 16 can be repeated insert the filtration pore of filter screen 2, and burr 16 can be released the raw materials in the filtration pore repeatedly, has realized the cleanness of filter screen 2 to avoid the raw materials to plug up the filtration pore of filter screen 2, do benefit to the filter effect who guarantees filter screen 2.

Example 2

Referring to fig. 3 and 4, the inflation mechanism in this embodiment includes a vertically arranged piston cylinder, a piston 20 is vertically slidably connected in the piston cylinder, a cylinder 19 for pushing the piston 20 to reciprocate is arranged above the piston cylinder, and a cylinder rod of the cylinder 19 is connected with the piston 20 through a screw. The screw rod 6 traversing the piston cylinder, be equipped with two gas outlets 24 that extend area 18 intercommunication respectively with two on the right side wall of piston cylinder, the welding of air inlet department of screw rod 6 has intake pipe 22, the welding has two connecting rods on the screw rod 6, the welding has the sprue 21 that pastes with the inner wall on the right side of piston cylinder on the tip that screw rod 6 was kept away from to two connecting rods, sprue 21 can be intermittent type and stop up gas outlet 24, the welding has the dead lever of vertical setting on the bottom of piston cylinder, the top welding of dead lever is like the curved sprue 23 that fig. 4 shows, the both ends of sprue 23 are located the both sides of screw rod 6, intake pipe 22's length equals the inner wall of sprue 23 to the distance between the. Because the shape of stifled strip 23 is the arc, when screw rod 6 drove intake pipe 22 and rotates like this, the mouth of pipe of intake pipe 22 can intermittent type sliding connection on stifled strip 23, and when the mouth of pipe of intake pipe 22 was towards stifled strip 23, intake pipe 22 was stopped up by stifled strip 23, and when stifled strip 23 was kept away from to the mouth of pipe of intake pipe 22, the mouth of pipe of intake pipe 22 was in the state of opening. The air outlet 24 and the air inlet pipe 22 in this embodiment are alternately blocked, that is, in the rotation process of the screw 6, when the orifice of the air inlet pipe 22 is blocked by the blocking strip 23, the blocking piece 21 and the air outlet 24 are in a staggered state, and the air outlet 24 is not blocked by the blocking piece 21; when the blocking piece 21 rotates to the air outlet 24 to block the air outlet 24, the opening of the air inlet pipe 22 is far away from the blocking strip 23, the opening of the air inlet pipe 22 cannot be blocked, and the air inlet pipe 22 is in an open state. In this embodiment, when the screw 6 rotates one turn, the piston 20 reciprocates up and down two times.

And starting the air cylinder 19 and the motor 12, wherein the air cylinder 19 drives the piston 20 to vertically reciprocate in the piston cylinder, and meanwhile, the motor 12 drives the screw rod 6 to rotate through the speed reducer 11. Because when the screw rod 6 rotates a circle, the piston 20 reciprocates up and down two times, and the air inlet pipe 22 and the air outlet 24 are alternatively blocked, in the rotating process of the screw rod 6, when the piston 20 moves downwards for the first time, the air outlet 24 is blocked by the blocking piece 21, the air inlet pipe 22 cannot be attached to the blocking strip 23, the air inlet pipe 22 cannot be blocked, air in the piston cylinder enters the screw rod 6 through the air inlet pipe 22, the expansion bag 9 expands, when the piston 20 moves upwards for the first time in the reverse direction, the blocking piece 21 still blocks the air outlet 24, the air inlet pipe 22 is still in an open state, the piston 20 sucks out air in the screw rod 6, the air in the expansion bag 9 is reduced, and the expansion bag 9 contracts. When the piston 20 moves downwards for the second time, at the moment, the air inlet pipe 22 rotates to one side of the blocking strip 23, the air inlet pipe 22 is blocked by the blocking strip 23, the blocking block 21 is separated from the air outlet 24, the air outlet 24 is opened, at the moment, air in the piston cylinder enters the extension belt 18 through the air outlet 24, and the rolling sheet 17 is unfolded to realize the cleaning of the filter screen 2; when the piston 20 moves upwards for the second time in the reverse direction, the air inlet pipe 22 is still blocked by the blocking strip 23, the air outlet 24 is still in an open state, the piston 20 sucks the air in the extension belt 18 through the air outlet 24, the air in the extension belt 18 is reduced, and the rolling sheet 17 is rolled up. Therefore, the steps are repeated, the gas in the piston cylinder alternately enters the screw 6, is discharged from the screw 6, then enters the stretching belt 18 and is discharged from the stretching belt 18, the expansion and contraction of the rolling sheet 17 and the expansion and contraction of the expansion bag 9 are automatically and alternately carried out, the rolling sheet and the expansion bag share one piston cylinder, the gas does not need to be manually controlled to respectively enter the stretching belt 18 and the expansion bag 9, the operation is simple and convenient, and the automation degree is high.

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 (7)

1. High temperature resistant film extrude feedway, including screw feeder, screw feeder is including extruding a section of thick bamboo and screw rod, and the one end of screw rod is arranged in extruding a section of thick bamboo, and the other end of screw rod is arranged in extruding a section of thick bamboo's the outside, and the screw rod rotates to be connected on extruding a section of thick bamboo, is equipped with a feeding section of thick bamboo on extruding a section of thick bamboo, is connected with blast pipe and drain pipe on extruding a section of thick bamboo, is equipped with heater, its characterized in: the screw comprises a smooth part and two sections of spiral parts, the smooth part is positioned between the two sections of spiral parts, the screw is hollow, the smooth part is provided with air holes, and the smooth part is fixedly connected with an expansion bag communicated with the air holes; the part of the screw rod, which is positioned outside the extrusion cylinder, is provided with an air inlet hole, and the outside of the extrusion cylinder is provided with an inflation mechanism for intermittently inflating the air inlet hole; filter screens are arranged between the exhaust pipe and the extrusion cylinder and between the drain pipe and the extrusion cylinder; an anti-blocking unit is arranged on one side, away from the extrusion cylinder, of the filter screen and comprises a coil sheet capable of being straightened, the coil sheet has elasticity, burrs are fixedly connected to one side, which is attached to the filter screen after the coil sheet is unfolded, of the coil sheet, an extension belt is fixedly connected to the other side of the coil sheet, one end, away from the coil sheet, of the extension belt is connected with an inflation mechanism, and the inflation mechanism intermittently inflates and deflates air to the extension belt; the inflation mechanism comprises a piston cylinder, a piston is connected in the piston cylinder in a sliding manner, an air cylinder used for pushing the piston to move in a reciprocating manner is arranged on the outer side of the piston cylinder, a screw rod penetrates through the piston cylinder, two air outlets which are respectively communicated with two extension belts are arranged on the side wall of the piston cylinder, an air inlet pipe is fixedly connected to the air inlet of the screw rod, two connecting rods are fixedly connected to the screw rod, a blocking block which is attached to the inner wall of the piston cylinder is fixedly connected to the end parts, away from the screw rod, of the two connecting rods, the air outlets are blocked by the blocking block intermittently, an arc-shaped blocking strip is fixedly connected in the piston cylinder, two; the air outlet and the air inlet pipe are alternatively blocked.

2. The extrusion feeding device of the high-temperature resistant film as claimed in claim 1, wherein: the screw rod is located one end in the extrusion section of thick bamboo outside and is connected with actuating mechanism, actuating mechanism includes motor and reduction gear, motor and retarder connection, the reduction gear is connected with the screw rod.

3. The extrusion feeding device of the high-temperature resistant film as claimed in claim 2, wherein: and the exhaust pipe is connected with an exhaust fan.

4. The extrusion feeding device of the high-temperature resistant film as claimed in claim 2, wherein: one end of the extrusion cylinder, which is far away from the driving mechanism, is conical, and the small end of the conical shape is far away from the extrusion cylinder.

5. The extrusion feeding device of the high-temperature resistant film as claimed in claim 1, wherein: and a fixed rod is fixedly connected between the blocking strip and the piston cylinder.

6. The extrusion feeding device of the high-temperature resistant film as claimed in claim 5, wherein: the bottom of the drain pipe is connected with a valve.

7. The extrusion feeding device of the high-temperature resistant film as claimed in claim 1, wherein: the inflation mechanism is an air pump.

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