CN210552874U

CN210552874U - Multi-layer machine head of corrugating machine

Info

Publication number: CN210552874U
Application number: CN201921457268.2U
Authority: CN
Inventors: 罗伟林; 施昌钱
Original assignee: Xiangshan Best Machinery Manufacturing Co ltd
Current assignee: Xiangshan Best Machinery Manufacturing Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-05-19
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to a multi-layer machine head of a corrugating machine, which comprises a cylinder body, a rear cover, a gland, an air inlet head, an inner cover, an air inlet cover, a pressing ring, an injection seat, an air outlet head, an air cylinder and an extrusion assembly; the extrusion assembly is sleeved outside the ventilation cylinder and arranged inside the cylinder body; the utility model can produce five layers of plastic corrugated pipes at one time, and the layers are completely laminated and integrated; the plastic corrugated pipes arranged in different layers can be formed by adjusting the feeding position of each extruder; in addition, a detachable structure is adopted, so that the disassembly, the washing and the maintenance are convenient; the structure of the first machine barrel, the second machine barrel, the third machine barrel, the fourth machine barrel and the fifth machine barrel can greatly improve the uniform distribution degree of molten materials, and prevent the phenomena of paste and leakage in the forming process; because five connecting holes are arranged in sequence along the circumferential direction, the positions and the angles of the five extruders can be reasonably placed in a staggered mode, and the installation and debugging are facilitated.

Description

Multi-layer machine head of corrugating machine

Technical Field

The utility model relates to a corrugating machine multilayer aircraft nose.

Background

The plastic corrugated pipe is a common connecting part and is widely applied to various devices; the corrugating machine is a special equipment for producing plastic corrugated pipe, and the machine head of the corrugating machine is an important part for forming the plastic corrugated pipe, and can reasonably divide the molten material input by the extruder and output the molten material circularly to form a pipe shape.

The existing plastic corrugated pipe machine head only has one layer of flow channel, only can form a single-layer plastic corrugated pipe at one time, the physical property and the chemical property of the single-layer plastic corrugated pipe are very single, the application range is extremely small, the single-layer plastic corrugated pipe cannot be applied to many unconventional fields at present, if the number of layers of the plastic corrugated pipe is increased, multiple layers need to be additionally coated on the outer side of the single-layer plastic corrugated pipe by means of matched equipment, but the method can only reach three layers at most, and the layers of the multi-layer plastic corrugated pipe produced by the method cannot be completely attached to each other and cannot be integrated into a whole, so that the method.

SUMMERY OF THE UTILITY MODEL

To the present situation of the above prior art, the utility model aims to solve the technical problem that a can once only produce the plastic corrugated pipe that the number of piles is five layers in order to enlarge application scope and richen physical properties and chemical properties, and laminate completely between the layer in order to form wholly, still adopt detachable structure so that unpick and wash and maintain to can prevent to produce the thickener and leak the corrugator multilayer aircraft nose of material phenomenon in the forming process.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a multi-layer machine head of a corrugating machine comprises a cylinder body, a rear cover, a gland, an air inlet head, an inner cover, the air inlet cover, a pressing ring, an injection seat, an air outlet head, an air vent cylinder and an extrusion assembly, and is characterized in that the rear cover is detachably fixed at the rear end of the cylinder body, the gland is detachably fixed on the outer side of the rear cover, the detachable pressing ring is fixed at the front end of the cylinder body, the injection seat is detachably fixed on the outer side of the pressing ring, the air outlet head is arranged inside the injection seat, the air vent cylinder is arranged inside the cylinder body, one end of the air vent cylinder is connected with the air outlet head, the inner cover is sleeved outside the air vent cylinder, the air inlet head is fixed at the other end of the air vent cylinder and inserted into the gland, and the; the extrusion assembly is sleeved outside the ventilation cylinder and arranged inside the cylinder body; the extrusion assembly comprises a first barrel, a second barrel, a third barrel, a fourth barrel, a fifth barrel, a first conical cover, a second conical cover, a third conical cover, and a fourth conical cover; the air breather is characterized in that the fifth cylinder is sleeved outside the air vent cylinder, one end of the fifth cylinder is detachably embedded in the rear cover, the fourth cylinder is sleeved outside the fifth cylinder, the third cylinder is sleeved outside the fourth cylinder, the second cylinder is sleeved outside the third cylinder, the first cylinder is sleeved outside the second cylinder, one ends of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all fixed on the inner side end surface of the rear cover, and the fourth conical cover is fixed at the other end of the fourth cylinder; the third conical cover is fixed at the other end of the third cylinder and sleeved outside the fourth conical cover, and the second conical cover is fixed at the other end of the second cylinder and sleeved outside the third conical cover; the first conical cover is fixed to the other end of the first cylinder and sleeved outside the second conical cover, the outer diameters and the inner diameters of the second cylinder, the third cylinder and the fourth cylinder are all reduced in sequence, and the structures of the second cylinder, the third cylinder and the fourth cylinder are the same as those of the first cylinder.

Preferably, a step ring is formed outwards on the outer side of one end of the ventilation cylinder, and the inner cover and the air inlet head are detachably fixed on the inner side end face and the outer side end face of the step ring respectively.

Preferably, an injection head is formed outwards in the center of the outer side of the injection seat, a first counter bore is formed in the center of the outer side of the injection head, a first positioning column is formed outwards in the center of the inner side of the injection seat, a second positioning column is formed outwards in the center of the inner side of the first positioning column, a conical counter bore is formed in the center of the inner side of the second positioning column, a cavity is formed in the injection head, and the inner end of the conical counter bore and the inner end of the first counter bore are respectively communicated with the centers of the inner walls of the inner side and the outer side of the cavity.

Preferably, the inner end of the gas outlet head is inserted and fixed in the other end of the breather cylinder, the outer end of the gas outlet head is outwards formed with a conical head, and the conical head is inserted into the conical counter bore; the second counter bore has been seted up at the outer end center of conical head, the third counter bore has been seted up at the inner center of gas outlet head, the air vent has been seted up between the bottom surface center of third counter bore and second counter bore.

Preferably, a conical sinking cavity is formed in the center of the inner side of the pressing ring, a fourth counter bore is formed in the center of the outer side of the pressing ring, a fifth counter bore is formed in the center of the bottom surface of the fourth counter bore, a sixth counter bore is formed in the center of the bottom surface of the fifth counter bore, the inner end of the sixth counter bore is communicated with the outer end of the conical sinking cavity, the outer end of the first conical cover is inserted into the conical sinking cavity, the first positioning column is inserted into the fourth counter bore, and the second positioning column is inserted into the fifth counter bore.

Preferably, a first discharge hole is formed in the center of the outer end of the first conical cover, a second discharge hole is formed in the center of the outer end of the second conical cover, a third discharge hole is formed in the center of the outer end of the third conical cover, and a fourth discharge hole is formed in the center of the outer end of the fourth conical cover.

Preferably, eight feeding holes which are distributed at equal angles along the circumferential direction are formed in the outer side of the rear end of the first cylinder, a first feeding hole is formed in the front side of one of the feeding holes, two first sub-runners which are symmetrically distributed are formed in the front side of the first feeding hole, two second sub-runners which are symmetrically distributed are formed in the outer end of each first sub-runner, and the outer ends of the two second sub-runners in one first sub-runner are respectively communicated with the outer ends of the two second sub-runners in the other first sub-runner; the outer side of the front end of the first cylinder is provided with first grooves distributed annularly, and the bottom surfaces of the first grooves are outwards provided with a plurality of spiral raised lines distributed at equal angles along the circumferential direction.

Preferably, a second feed inlet is formed in the outer side of the rear end of the fifth cylinder, two third branched flow channels which are symmetrically distributed are formed in the outer end of the second feed inlet outwards, two fourth branched flow channels which are symmetrically distributed are formed in the front side of each third branched flow channel outwards, and the outer ends of the two fourth branched flow channels in one third branched flow channel are respectively communicated with the outer ends of the two fourth branched flow channels in the other third branched flow channel; and a second groove which is distributed annularly is formed in the outer side of the front end of the fifth machine barrel.

Preferably, five connecting holes which are sequentially distributed along the circumferential direction are formed in the outer side of the rear end of the cylinder body.

Compared with the prior art, the utility model has the advantages of: the utility model can produce five layers of plastic corrugated pipe at one time, which enlarges the application range, enriches the physical property and chemical property, and the layers are completely laminated and form a whole; the plastic corrugated pipes arranged in different layers can be formed by adjusting the feeding position of each extruder; in addition, a detachable structure is adopted, so that the disassembly, the washing and the maintenance are convenient, and the operation is convenient; the structure of the first cylinder, the second cylinder, the third cylinder, the fourth cylinder and the fifth cylinder can greatly improve the uniform distribution degree of molten materials and prevent the paste phenomenon in the forming process; the first cylinder, the second cylinder, the third cylinder, the fourth cylinder and the fifth cylinder are well sealed with each other, so that material leakage is prevented; because five connecting holes are arranged in sequence along the circumferential direction, the positions and the angles of the five extruders can be staggered and reasonably placed, the installation and debugging are convenient, and the equal vertical distance between each feeding position and the discharge hole can be ensured.

Drawings

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

FIG. 2 is a front structural view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is an exploded view of the present invention;

FIG. 5 is a cross-sectional view of the extrusion assembly of the present invention;

fig. 6 is a block diagram of a first barrel of the present invention;

fig. 7 is a block diagram of a fifth barrel of the present invention.

Detailed Description

As shown in fig. 1 to 7, a multi-layer machine head of a corrugating machine comprises a cylinder body 1, a rear cover 3, a gland 4, an air inlet head 5, an inner cover 14, an air inlet cover 15, a pressing ring 6, an injection seat 7, an air outlet head 8, an air vent cylinder 9 and an extrusion assembly; the rear cover 3 is detachably fixed at the rear end of the barrel body 1, the gland 4 is detachably fixed at the outer side of the rear cover 3, the detachable pressing ring 6 is fixed at the front end of the barrel body 1, the injection seat 7 is detachably fixed at the outer side of the pressing ring 6, the air outlet head 8 is arranged inside the injection seat 7, the ventilation barrel 9 is arranged inside the barrel body 1, one end of the ventilation barrel 9 is connected with the air outlet head 8, the inner cover 14 is sleeved outside the ventilation barrel 9, the air inlet head 5 is fixed at the other end of the ventilation barrel 9 and inserted into the gland 4, and the air inlet cover 15 is detachably fixed at the outer end of the air inlet head; the extrusion assembly is sleeved outside the ventilation cylinder 9 and is arranged inside the cylinder body 1; the extrusion assembly includes a first barrel 16, a second barrel 17, a third barrel 18, a fourth barrel 19, a fifth barrel 20, a first conical cap 10, a second conical cap 11, a third conical cap 12, and a fourth conical cap 13; a fifth cylinder 20 is sleeved outside the vent cylinder 9, one end of the fifth cylinder 20 is detachably embedded in the rear cover 3, a fourth cylinder 19 is sleeved outside the fifth cylinder 20, a third cylinder 18 is sleeved outside the fourth cylinder 19, a second cylinder 17 is sleeved outside the third cylinder 18, a first cylinder 16 is sleeved outside the second cylinder 17, one ends of the first cylinder 16, the second cylinder 17, the third cylinder 18 and the fourth cylinder 19 are all fixed on the inner side end surface of the rear cover 3, and a fourth conical cover 13 is fixed at the other end of the fourth cylinder 19; the third conical cover 12 is fixed at the other end of the third cylinder 18 and sleeved outside the fourth conical cover 13, and the second conical cover 11 is fixed at the other end of the second cylinder 17 and sleeved outside the third conical cover 12; the first conical cover 10 is fixed at the other end of the first machine barrel 16 and sleeved outside the second conical cover 11; a step ring 91 is formed outwards on the outer side of one end of the vent cylinder 9, the inner cover 14 and the air inlet head 5 are respectively detachably fixed on the inner side end face and the outer side end face of the step ring 91, an injection head 71 is formed outwards on the outer side center of the injection seat 7, a first counter bore 74 is formed in the outer side center of the injection head 71, a first positioning column 75 is formed outwards on the inner side center of the injection seat 7, a second positioning column 76 is formed outwards on the inner side center of the first positioning column 75, a conical counter bore 72 is formed in the inner side center of the second positioning column 76, a cavity 73 is formed inside the injection head 71, and the inner end of the conical counter bore 72 and the inner end of the first counter bore 74 are respectively communicated with the inner wall centers of; the inner end of the gas outlet head 8 is inserted and fixed in the other end of the breather cylinder 9, the outer end of the gas outlet head 8 is outwards formed with a conical head 84, and the conical head 84 is inserted in the conical counter bore 72; a second counter bore 81 is formed in the center of the outer end of the conical head 84, a third counter bore 83 is formed in the center of the inner end of the gas outlet head 8, and a vent hole 82 is formed between the third counter bore 83 and the center of the bottom surface of the second counter bore 81; a conical sunk cavity 61 is formed in the center of the inner side of the pressing ring 6, a fourth counter bore 62 is formed in the center of the outer side of the pressing ring 6, a fifth counter bore 63 is formed in the center of the bottom surface of the fourth counter bore 62, a sixth counter bore 64 is formed in the center of the bottom surface of the fifth counter bore 63, the inner end of the sixth counter bore 64 is communicated with the outer end of the conical sunk cavity 61, the outer end of the first conical cover 10 is inserted into the conical sunk cavity 61, a first positioning column 75 is inserted into the fourth counter bore 62, and a second positioning column 76 is inserted into the fifth counter bore 63; a first discharging hole 1001 is formed in the center of the outer end of the first conical cover 10, a second discharging hole 111 is formed in the center of the outer end of the second conical cover 11, a third discharging hole 121 is formed in the center of the outer end of the third conical cover 12, and a fourth discharging hole 131 is formed in the center of the outer end of the fourth conical cover 13; eight feeding holes 161 which are distributed at equal angles along the circumferential direction are formed in the outer side of the rear end of the first barrel 16, a first feeding hole 162 is formed in the front side of one feeding hole 161, two first branch runners 163 which are distributed symmetrically are formed in the front side of the first feeding hole 162 outwards, two second branch runners 164 which are distributed symmetrically are formed in the outer end of each first branch runner 163 outwards, and the outer ends of the two second branch runners 164 in one first branch runner 163 are respectively communicated with the outer ends of the two second branch runners 164 in the other first branch runner 163; a first groove 165 distributed annularly is formed on the outer side of the front end of the first cylinder 16, and a plurality of spiral raised strips 166 distributed at equal angles along the circumferential direction are formed outwards on the bottom surface of the first groove 165; the outer diameter and the inner diameter of the second cylinder 17, the third cylinder 18 and the fourth cylinder 19 are all reduced in sequence, and the structure of the second cylinder 17, the third cylinder 18 and the fourth cylinder 19 is the same as that of the first cylinder 16; a second feed inlet 2001 is formed in the outer side of the rear end of the fifth cylinder 20, two symmetrically-distributed third branched flow channels 2002 are formed in the outer end of the second feed inlet 2001 outwards, two symmetrically-distributed fourth branched flow channels 2003 are formed in the front side of each third branched flow channel 2002 outwards, and the outer ends of the two fourth branched flow channels 2003 in one third branched flow channel 2002 are communicated with the outer ends of the two fourth branched flow channels 2003 in the other third branched flow channel 2002 respectively; a second groove 2004 distributed annularly is formed in the outer side of the front end of the fifth cylinder 20; five connecting holes 101 which are sequentially distributed along the circumferential direction are formed in the outer side of the rear end of the cylinder body 1.

In use, the discharge connectors 2 of five extruders are respectively inserted into the five connecting holes 101, the inner end of one discharge connector 2 is inserted into the first feed opening 162 of the first barrel 16, the other discharge connector 2 is inserted into the feed opening at the corresponding position on the second barrel 17 through one feed opening 161 of the first barrel 16, the other discharge connector 2 is inserted into the feed opening at the corresponding position on the third barrel 18 through one feed opening of the first barrel 16 and the second barrel 17, the other discharge connector 2 is inserted into the feed opening at the corresponding position on the fourth barrel 19 through one feed opening of the first barrel 16, the second barrel 17 and the third barrel 18, and the remaining discharge connector 2 is inserted into the feed opening at the corresponding position on the fourth barrel 19 through the first barrel 16, One of the feeding holes of the second barrel 17, the third barrel 18 and the fourth barrel 19 is corresponding to each other and inserted into the second feeding hole 2001 of the fifth barrel 20, thus completing the access of the five extruders; secondly, inserting an air pipe into the air inlet cover 15, leading air with pressure into the air inlet head 5 through the air pipe, leading the air pipe into the air outlet head 8 through the air breather 9, leading the air pipe into the tapered counter bore 72 through the third counter bore 83, the vent hole 82 and the second counter bore 81, simultaneously starting five extruders to extrude the molten materials onto the first barrel 16, the second barrel 17, the third barrel 18, the fourth barrel 19 and the fifth barrel 20 respectively, leading the molten materials extruded onto the first barrel 16 into two first branch flow channels 163 in two paths respectively, further continuously dividing the molten materials through four second branch flow channels 164, then leading the molten materials into a first groove 165, dividing the molten materials into a plurality of strands of molten materials under the action of spiral ribs 166 to uniformly enter a region between the first tapered cover 10 and the two tapered counter bores 61, and finally leading the molten materials into the tapered counter bore 72 through the sixth counter bore 64 and along the outer side surface of the tapered head 84, similarly, the melt extruded into the second cylinder 17 finally enters the first discharging hole 1001 through the area between the second cone cover 11 and the first cone cover 10 and enters the tapered counterbore 72 along the outer side surface of the tapered head 84, the melt extruded into the third cylinder 18 finally enters the second discharging hole 111 through the area between the third cone cover 12 and the second cone cover 11 and enters the tapered counterbore 72 along the outer side surface of the tapered head 84, and the melt extruded into the fourth cylinder 19 finally enters the third discharging hole 121 through the area between the fourth cone cover 13 and the third cone cover 12 and enters the tapered counterbore 72 along the outer side surface of the tapered head 84; the molten material extruded to the fifth cylinder 20 enters two third branched runners 2002 respectively in two ways, further continues to be branched through the four fourth branched runners 2003, then enters a second groove 2004 forwards, finally enters a region between the fifth cylinder 20 and the fourth cylinder 19, and finally enters the conical counter bore 72 through the fourth discharging hole 131 and along the outer side surface of the conical head 84; the five-layer molten material enters the cavity 73 clearly at the same time under the action of the pressurized gas and is finally extruded outwards from the first counter bore 74.

The plastic corrugated pipe is a common connecting part and is widely applied to various devices; the corrugating machine is a special device for producing plastic corrugated pipes, the machine head of the corrugating machine is an important part for molding the plastic corrugated pipes, and can reasonably divide molten materials input by an extruder and output the molten materials annularly to form a pipe shape; the existing plastic corrugated pipe machine head only has one layer of flow channel, and only can form a single-layer plastic corrugated pipe at one time, the physical property and the chemical property of the single-layer plastic corrugated pipe are very single, the application range is extremely small, and the single-layer plastic corrugated pipe cannot be applied to many unconventional fields at present, if the number of layers of the plastic corrugated pipe is increased, a plurality of layers need to be additionally coated on the outer side of the single-layer plastic corrugated pipe by means of matched equipment, but the method can only reach three layers at most, and the layers of the multi-layer plastic corrugated pipe produced by the method cannot be completely attached to each other and; the utility model can produce five layers of plastic corrugated pipe at one time, which enlarges the application range, enriches the physical property and chemical property, and the layers are completely laminated and form a whole; the plastic corrugated pipes arranged in different layers can be formed by adjusting the feeding position of each extruder; in addition, a detachable structure is adopted, so that the disassembly, the washing and the maintenance are convenient; the structure of the first cylinder 16, the second cylinder 17, the third cylinder 18, the fourth cylinder 19 and the fifth cylinder 20 can greatly improve the uniform distribution degree of molten materials, prevent paste from being generated in the forming process, and ensure that the first cylinder 16, the second cylinder 17, the third cylinder 18, the fourth cylinder 19 and the fifth cylinder 20 are well sealed with one another to prevent leakage; because five connecting holes 101 are arranged in sequence along the circumferential direction, the positions and the angles of the five extruders can be staggered and reasonably placed, so that the installation and debugging are convenient, and the equal vertical distance between each feeding position and the discharge hole can be ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A multi-layer machine head of a corrugating machine comprises a cylinder body, a rear cover, a gland, an air inlet head, an inner cover, the air inlet cover, a pressing ring, an injection seat, an air outlet head, an air vent cylinder and an extrusion assembly, and is characterized in that the rear cover is detachably fixed at the rear end of the cylinder body, the gland is detachably fixed on the outer side of the rear cover, the detachable pressing ring is fixed at the front end of the cylinder body, the injection seat is detachably fixed on the outer side of the pressing ring, the air outlet head is arranged inside the injection seat, the air vent cylinder is arranged inside the cylinder body, one end of the air vent cylinder is connected with the air outlet head, the inner cover is sleeved outside the air vent cylinder, the air inlet head is fixed at the other end of the air vent cylinder and inserted into the gland, and the; the extrusion assembly is sleeved outside the ventilation cylinder and arranged inside the cylinder body; the extrusion assembly comprises a first barrel, a second barrel, a third barrel, a fourth barrel, a fifth barrel, a first conical cover, a second conical cover, a third conical cover, and a fourth conical cover; the air breather is characterized in that the fifth cylinder is sleeved outside the air vent cylinder, one end of the fifth cylinder is detachably embedded in the rear cover, the fourth cylinder is sleeved outside the fifth cylinder, the third cylinder is sleeved outside the fourth cylinder, the second cylinder is sleeved outside the third cylinder, the first cylinder is sleeved outside the second cylinder, one ends of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all fixed on the inner side end surface of the rear cover, and the fourth conical cover is fixed at the other end of the fourth cylinder; the third conical cover is fixed at the other end of the third cylinder and sleeved outside the fourth conical cover, and the second conical cover is fixed at the other end of the second cylinder and sleeved outside the third conical cover; the first conical cover is fixed to the other end of the first cylinder and sleeved outside the second conical cover, the outer diameters and the inner diameters of the second cylinder, the third cylinder and the fourth cylinder are all reduced in sequence, and the structures of the second cylinder, the third cylinder and the fourth cylinder are the same as those of the first cylinder.

2. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein a step ring is formed on an outer side of one end of the vent cylinder, and the inner cover and the air inlet head are detachably fixed to inner and outer side end faces of the step ring respectively.

3. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein an injection head is formed outwards from the center of the outer side of the injection seat, a first counter bore is formed in the center of the outer side of the injection head, a first positioning column is formed outwards from the center of the inner side of the injection seat, a second positioning column is formed outwards from the center of the inner side of the first positioning column, a tapered counter bore is formed in the center of the inner side of the second positioning column, a cavity is formed in the injection head, and the inner end of the tapered counter bore and the inner end of the first counter bore are respectively communicated with the centers of inner walls of the inner side and the outer side of the cavity.

4. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein an inner end of the gas outlet head is fixedly inserted into the other end of the breather tube, an outer end of the gas outlet head is outwardly formed with a conical head, and the conical head is inserted into the conical counter bore; the second counter bore has been seted up at the outer end center of conical head, the third counter bore has been seted up at the inner center of gas outlet head, the air vent has been seted up between the bottom surface center of third counter bore and second counter bore.

5. The multi-layer machine head of the corrugating machine as claimed in claim 3, wherein a tapered sinking cavity is formed in the center of the inner side of the pressing ring, a fourth counter bore is formed in the center of the outer side of the pressing ring, a fifth counter bore is formed in the center of the bottom surface of the fourth counter bore, a sixth counter bore is formed in the center of the bottom surface of the fifth counter bore, the inner end of the sixth counter bore is communicated with the outer end of the tapered sinking cavity, the outer end of the first tapered cover is inserted into the tapered sinking cavity, the first positioning column is inserted into the fourth counter bore, and the second positioning column is inserted into the fifth counter bore.

6. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein a first discharging hole is formed in the center of the outer end of the first conical cover, a second discharging hole is formed in the center of the outer end of the second conical cover, a third discharging hole is formed in the center of the outer end of the third conical cover, and a fourth discharging hole is formed in the center of the outer end of the fourth conical cover.

7. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein eight feed holes are formed in the outer side of the rear end of the first cylinder and are distributed at equal angles along the circumferential direction, a first feed port is formed in the front side of one of the feed holes, two first sub-runners are formed in the front side of the first feed port and are distributed symmetrically, two second sub-runners are formed in the outer end of each first sub-runner and are distributed symmetrically, and the outer ends of the two second sub-runners in one first sub-runner are communicated with the outer ends of the two second sub-runners in the other first sub-runner; the outer side of the front end of the first cylinder is provided with first grooves distributed annularly, and the bottom surfaces of the first grooves are outwards provided with a plurality of spiral raised lines distributed at equal angles along the circumferential direction.

8. The multi-layer machine head of the corrugating machine as claimed in claim 1, wherein a second feed inlet is formed in the outer side of the rear end of the fifth cylinder, two symmetrically distributed third runners are formed in the outer end of the second feed inlet, two symmetrically distributed fourth runners are formed in the front side of each third runner, and the outer ends of the two fourth runners in one third runner are communicated with the outer ends of the two fourth runners in the other third runner; and a second groove which is distributed annularly is formed in the outer side of the front end of the fifth machine barrel.

9. The multi-layer machine head of the corrugating machine as claimed in claim 8, wherein five connecting holes are formed in the outer side of the rear end of the cylinder body and are sequentially arranged in the circumferential direction.