CN113524479A

CN113524479A - Forming device for PVC drain pipe production and preparation method thereof

Info

Publication number: CN113524479A
Application number: CN202110640675.2A
Authority: CN
Inventors: 谭中全
Original assignee: Anhui Lantong Technology Co Ltd
Current assignee: Anhui Lantong Technology Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-10-22

Abstract

The invention discloses a forming device for producing a PVC drain pipe and a preparation method thereof, wherein the PVC drain pipe is produced and manufactured by adopting the preparation method of a P VC drain pipe, and the production method comprises the following steps: preparing raw materials, preparing auxiliary agents, stirring and mixing, extruding out of a die, and cooling and forming. This forming device is used in production of PVC drain pipe includes: the extruding device is fixedly arranged at the bottom of the feeding device, the forming device is fixedly arranged on the right side of the extruding device, and the cooling device is fixedly arranged on the right side of the forming device; inside the PVC pipe entered into the cooling tube, the switch of booster pump started this moment, inside the booster pump poured into the water pipe with external cooling water to inside entering into the cooling tube, carrying out the blowout work in the apopore on the cooling tube inner wall, carried out even water-cooling work to the whole body position of PVC pipe, the water after the cooling was discharged through the recovery tube, the subsequent work of utilizing of being convenient for.

Description

Forming device for PVC drain pipe production and preparation method thereof

Technical Field

The invention relates to the field of PVC drain pipe production equipment, in particular to a forming device for PVC drain pipe production and a preparation method thereof.

Background

In the prior art, when plastic pipes are extruded and molded, materials enter a charging barrel from a hopper of an extruder, are converted into uniform continuous melt with certain fluidity from powder or granular solid state under the action of the temperature of the charging barrel and the rotary compaction and mixing action of a screw, the plastic melt flows into a machine head (namely an extrusion die) through a splitter plate under the action of the rotary extrusion of the screw after moving to the vicinity of the front end of the charging barrel, and is molded into high-temperature tubular objects according to the shapes of molded parts (a die, a core die and the like) in the machine head, and the high-temperature tubular plastic pipes are required to be produced under the action of a high-temperature tubular plastic sizing device, a cooling device, a traction device and a cutting device.

Through searching, the utility model with the bulletin number of CN102441976A discloses a plastic extrusion molding device, which mainly comprises a power mechanism, a hopper, a charging barrel heater, a screw, a machine head, a sizing device, a cooling device, a traction device, a cutting device and the like; "

When the plastic pipe is extruded from the extruder, the plastic pipe needs to be cooled, and the cooling device for the plastic in the prior art has the following three problems;

1. the cooling device is a rectangular water tank, the occupied area of the cooling device is too large, a large-scale factory building needs to be rented, and the production cost is increased;

2. the cooling device has long cooling time for the plastic pipe, the cooling time is generally 30 minutes, and the production efficiency of the device is reduced;

3. the plastic pipe just formed is soft in texture, and if the plastic pipe is not cooled in time, the plastic pipe can deform, so that the forming quality of the plastic pipe is influenced.

In view of the above, the present invention has been made in view of the above problems.

Disclosure of Invention

The invention provides a forming device for producing a PVC drain pipe and a preparation method thereof in order to make up for market vacancy.

The invention aims to provide a forming device for producing a PVC drain pipe and a preparation method thereof, and aims to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation method of a PVC drain pipe comprises the following steps: preparing raw materials, preparing an auxiliary agent, stirring and mixing, extruding a die and cooling and forming;

step A, preparing raw materials: 120 parts of synthetic PVC resin particles, wherein the particle size of the synthetic PVC resin particles is between 0.8mm and 1.1 mm;

b, auxiliary agent preparation: 4-10 parts of stabilizer, 3-11 parts of lubricant, 5-13 parts of odor removing adsorbent, 6-12 parts of aromatic and 7-10 parts of brightener;

step C, stirring and mixing: mixing the material obtained in the step A and the five auxiliary agents in the step B together, stirring and mixing the mixture by a stirring device for 2 hours, and optionally adding other auxiliary agents and solution in the stirring and mixing process; forming a material a after stirring and mixing are finished;

step D, conveying and feeding: injecting the material a into a hopper of an extruder;

step E, extruding the die: the material in the hopper enters the screw extruder and is injected into the die for molding operation;

step F, cooling and forming: after the formed pipe body coming out of the die is cooled and hardened by a cooling device, the forming operation of the PVC drain pipe can be completed;

the auxiliary agent preparation comprises the following steps: the main component of the stabilizer is calcium zinc stabilizer, and the initial melting point of the stabilizer is more than 55 ℃; the main component of the lubricant is polyethylene wax with the density of 1.22 g/ml; the main component of the odor removing adsorbent is aluminosilicate adsorbent; the main component of the aromatic is natural perfume; the main component of the whitening agent is a stilbene derivative.

The utility model provides a forming device is used in production of PVC drain pipe, includes:

the device comprises a feeding device, an extruding device is fixedly arranged at the bottom of the feeding device, a forming device is fixedly arranged on the right side of the extruding device, a cooling device is fixedly arranged on the right side of the forming device, and a cutting device is arranged on the right side of the cooling device;

the upper end of a hopper of the feeding device is fixedly provided with a driving motor, an output shaft of the driving motor is fixedly arranged with a discharging dragon, and the discharging dragon is arranged in the feeding channel;

the extruding device is characterized in that an extruding rod is arranged in an extruding cylinder of the extruding device, and the end part of the extruding rod is fixedly arranged with an output shaft of an extruding motor;

the end part of a forming pipe of the forming device is fixedly arranged with the connecting pipe, a forming rod is arranged in the connecting pipe, and the forming rod is fixedly arranged in the forming pipe through a fixing bolt;

a cooling pipeline is arranged in the cooling box outside the cooling device through a bracket, the upper end of the cooling pipeline is communicated with a water pipe, and a booster pump is arranged at the top of the cooling box;

the cutting device, install the pneumatic cylinder on cutting device's the fixed frame, and the piston rod of pneumatic cylinder and the fixed setting of diaphragm, the bottom spiro union of diaphragm is fixed with the blade simultaneously to the bottom of fixed frame is installed and is placed the board, places the surface of board and has placed the PVC tubular construction.

Further, feed arrangement includes driving motor, hopper, first hot plate, feedstock channel and ejection of compact flood dragon, and the feedstock channel bottom sets up with the feed inlet intercommunication of extruding cylinder, and feedstock channel upper end and hopper welded fastening simultaneously, fixed being provided with first hot plate in feedstock channel's the inner wall.

Furthermore, extrusion device is including extruding a section of thick bamboo, extrusion pole, second hot plate and intercommunication passageway, and extrudes and pass through the screw fixation between a right-hand member and the intercommunication passageway of a section of thick bamboo, and the inside grafting of right-hand member of intercommunication passageway has the connecting pipe simultaneously, and the through-hole spiro union that the fixed screw tip passed on the intercommunication passageway is in the spiro union hole that the connecting pipe surface was seted up.

Further, forming device includes connecting pipe, forming tube, fixing bolt, flange, nut, shaping pole, mold core and die cavity, and the shaping pole left end sets up at the forming tube inner wall through three fixed bolt of group, and three fixed bolt of group are regular triangle-shaped and distribute.

Furthermore, the forming rod comprises a rod body, a heating channel, a hot oil inlet pipe, a cooling water inlet pipe, a cooling channel, a cooling water outlet pipe, a hot oil outlet pipe and an inclined plane, the left side of the interior of the rod body is provided with the heating channel, and the right side of the interior of the rod body is provided with the cooling channel; heating channel and cooling channel are the spiral setting, and the one end hot oil of heating channel advances a tub fixed setting, and the other end hot oil exit tube of heating channel is fixed to be set up simultaneously, and cooling channel's one end advances a tub fixed setting with the cooling water to cooling channel's the other end and the fixed setting of cooling water exit tube.

Furthermore, the mold core is of an annular structure made of metal materials, the mold core is sleeved on the right side of the rod body, meanwhile, a threaded hole is formed in the right side of the rod body, a nut is screwed on the right side of the rod body, and the mold core is fixedly arranged on the rod body through the nut; the inclined plane has been seted up in the outside of the body of rod, and the summit of inclined plane and mold core level setting, and simultaneously, the inclination of inclined plane is 10.

Further, cooling device includes cooler bin, cooling tube, water pipe, booster pump, bottom plate, recovery tube and apopore, and the cooler bin middle part sets up for cavity, and the cooler bin bottom is provided with the bottom plate simultaneously, and the inclination of bottom plate is 3, and the coolant liquid recovery tube is installed to the bottom left side downside of cooler bin, and multiunit apopore has evenly been seted up on the inner wall surface of cooler bin, and the cooler bin leads to pipe and the booster pump intercommunication sets up.

Further, cutting device includes the pneumatic cylinder, fixed frame, the perforation, the piston rod, support the pressure device, place the board, the trompil, blade and diaphragm, support the pressure device and set up to two sets of distributions in the both sides of diaphragm, place the board surface and seted up the trompil, the blade is pegged graft inside the trompil, support the pressure device and be divided by the limiting plate, buffer spring, depression bar and support the pressure plate four bibliographic categories and constitute, and support the bottom of clamp plate and seted up the arc recess, support the pressure plate upper end and the fixed setting of depression bar, buffer spring has been cup jointed in the depression bar outside simultaneously, the upper end of depression bar is passed diaphragm and the fixed setting of limiting plate.

The PVC drain pipe is produced and manufactured by adopting the preparation method of the PVC drain pipe.

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

1. the material enters the die cavity through the connecting pipe to be molded, the die core is of a detachable structure on the molding rod, so that the die cores with different sizes can be conveniently replaced, and the thickness of the pipe wall of the molded PVC pipe is controlled by replacing the die cores with different sizes;

2. heating oil is used for heating materials on the left side of the die cavity, and meanwhile, a forming pipeline on the right side of the die cavity is cooled through a cooling channel between die stripping, so that a PVC pipe is hardened under the cooling operation of the cooling channel when the PVC pipe is subjected to die stripping, the PVC pipe after die stripping is deformed, and the forming quality of the PVC pipe is improved;

3. the first cooling process of the cooling channel forming device and the second cooling process of the cooling device forming device are carried out simultaneously, the two cooling processes work simultaneously, the forming quality of the PVC pipe can be improved, and meanwhile, the arrangement of the two cooling processes can reduce the floor area of the cooling device and the production cost of the PVC pipe while improving the cooling effect of the PVC pipe;

4. the inclined surface is arranged, so that the material enters the inside of the die cavity through the connecting pipe, and the resistance of the material moving in the die cavity is reduced;

5. when the PVC pipe enters the cooling pipeline, the switch of the booster pump is started at the moment, the booster pump injects outside cooling water into the water pipe and enters the cooling pipeline, the cooling water is sprayed out of the water outlet hole in the inner wall of the cooling pipeline to uniformly cool the whole body of the PVC pipe, and the cooled water is discharged through the recovery pipe, so that the subsequent utilization work is facilitated;

6. when the blade moved down, two sets of pressure plates of supporting this moment supported tightly in the both sides of PVC pipe for when the blade cut the PVC pipe, the perk can not take place for the both sides of PVC pipe, improves the cutting quality to the PVC pipe.

Drawings

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

FIG. 2 is a schematic view of a feeding device and an extrusion device in the structure of the invention;

FIG. 3 is a schematic view of a molding apparatus of the present invention;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 3 of the structure of the present invention;

FIG. 5 is a schematic cross-sectional view B-B of FIG. 3 illustrating the structure of the present invention;

FIG. 6 is an exploded view of FIG. 3 of the structure of the present invention;

FIG. 7 is a schematic view of a cooling device of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7 of the structure of the present invention;

FIG. 9 is a schematic view of a cutting apparatus constructed in accordance with the present invention;

FIG. 10 is a schematic cross-sectional view E-E of the structure of the present invention;

FIG. 11 is a side view of FIG. 10 of the structure of the present invention;

FIG. 12 is a sectional side view F-F of FIG. 9 of the structure of the present invention;

FIG. 13 is a top plan view of a mounting plate of the structure of the present invention;

fig. 14 is a schematic cross-sectional view D-D of fig. 9 of the inventive structure.

In the figure: 1. a feeding device; 11. a drive motor; 12. a hopper; 13. a first heating plate; 14. a feed channel; 15. discharging dragon; 2. an extrusion device; 21. an extrusion cylinder; 22. an extrusion stem; 23. a second heating plate; 24. a communication channel; 3. a molding device; 31. a connecting pipe; 32. forming a tube; 33. fixing the bolt; 34. a connecting flange; 35. a nut; 36. forming a rod; 361. a rod body; 362. a heating channel; 363. hot oil enters the pipe; 364. a cooling water inlet pipe; 365. a cooling channel; 366. a cooling water outlet pipe; 367. a hot oil outlet pipe; 368. an inclined surface; 37. a mold core; 38. a mold cavity; 4. a cooling device; 41. a cooling tank; 42. a cooling duct; 43. a water pipe; 44. a booster pump; 45. a base plate; 46. a recovery pipe; 47. a water outlet hole; 5. a cutting device; 51. a hydraulic cylinder; 52. a fixing frame; 53. perforating; 54. a piston rod; 55. a pressing device; 551. a limiting plate; 552. a buffer spring; 553. a pressure lever; 554. pressing the plate; 56. placing the plate; 57. opening a hole; 58. a blade; 59. a transverse plate.

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 (b):

the first embodiment is as follows:

The second embodiment is as follows: please refer to fig. 1-14: the utility model provides a forming device is used in production of PVC drain pipe, includes: the device comprises a feeding device 1, an extruding device 2, a forming device 3, a cooling device 4 and a cutting device 5;

the bottom of the feeding device 1 is fixedly provided with an extruding device 2, the right side of the extruding device 2 is fixedly provided with a forming device 3, the right side of the forming device 3 is fixedly provided with a cooling device 4, and the right side of the cooling device 4 is provided with a cutting device 5;

the feeding device 1 is characterized in that a driving motor 11 is fixedly arranged at the upper end of a hopper 12 of the feeding device 1, an output shaft of the driving motor 11 is fixedly arranged with a discharging auger 15, and the discharging auger 15 is arranged in a feeding channel 14;

an extrusion rod 22 is arranged in an extrusion cylinder 21 of the extrusion device 2, and the end part of the extrusion rod 22 is fixedly arranged with an output shaft of an extrusion motor;

the end part of a forming pipe 32 of the forming device 3 is fixedly arranged with the connecting pipe 31, a forming rod 36 is arranged in the connecting pipe 31, and the forming rod 36 is fixedly arranged in the forming pipe 32 through a fixing bolt 33;

a cooling pipeline 42 is arranged in the cooling tank 41 outside the cooling device 4 through a bracket, the upper end of the cooling pipeline 42 is communicated with a water pipe 43, and a booster pump 44 is arranged at the top of the cooling tank 41;

the hydraulic cylinder 51 is installed on the fixing frame 52 of the cutting device 5, the piston rod 54 of the hydraulic cylinder 51 is fixedly arranged with the transverse plate 59, the blade 58 is fixed on the bottom of the transverse plate 59 in a threaded manner, the placing plate 56 is installed on the bottom of the fixing frame 52, and the PVC pipe structure is placed on the surface of the placing plate 56.

The prepared raw materials are added into the feeding device 1, the raw materials are heated into a molten state in the feeding device 1, the raw materials are injected into the extruding device 2 under the action of the discharging dragon 15, the raw materials are injected into the forming device 3 under the action of the extruding rod 22 in the extruding device 2, forming operation is carried out, the formed PV C pipe is hardened under the cooling operation of the cooling device 4 and then enters the cutting device 5, and the PVC pipe is cut off by the cutting device 5, so that subsequent carrying operation is facilitated.

The third concrete implementation mode: the second embodiment is further limited by the second embodiment, as shown in fig. 1-2, the feeding device 1 includes a driving motor 11, a hopper 12, a first heating plate 13, a feeding channel 14 and a discharging auger 15, the bottom of the feeding channel 14 is communicated with the feeding port of the extruding cylinder 21, the upper end of the feeding channel 14 is welded and fixed to the hopper 12, and the first heating plate 13 is fixedly disposed in the inner wall of the feeding channel 14.

Ejection of compact flood dragon 15 rotates work under driving motor 11's effect, and inside the barrel 21 was injected into to the inside melting material of hopper 12 this moment under ejection of compact flood dragon 15's effect, installs second hot plate 23 in the barrel 21 inner wall, avoids extruding the inside material cooling of barrel 21 and hardens, and the condition that reduces the shaping quality of PVC forming tube takes place.

The fourth concrete implementation mode: as shown in fig. 2, the extruding device 2 includes an extruding cylinder 21, an extruding rod 22, a second heating plate 23, and a communicating channel 24, and the right end of the extruding cylinder 21 and the communicating channel 24 are fixed by screws, and a connecting pipe 31 is inserted into the right end of the communicating channel 24, and the end of the fixing screw passes through a through hole on the communicating channel 24 and is screwed into a screw hole formed on the surface of the connecting pipe 31.

The fifth concrete implementation mode: as shown in fig. 3 to 6, the forming device 3 includes a connecting pipe 31, a forming pipe 32, fixing bolts 33, a connecting flange 34, a nut 35, a forming rod 36, a mold core 37, and a mold cavity 38, wherein the left end of the forming rod 36 is fixedly disposed on the inner wall of the forming pipe 32 through three sets of fixing bolts 33, and the three sets of fixing bolts 33 are distributed in a regular triangle.

The material enters into the inside shaping work that carries out of die cavity 38 through connecting pipe 31, and mold core 37 is detachable construction on shaping pole 36, is convenient for change not unidimensional mold core 37, through changing not unidimensional mold core 37, controls the pipe wall thickness of shaping back PVC pipe.

The sixth specific implementation mode: as shown in fig. 3, the forming rod 36 includes a rod body 361, a heating channel 362, a hot oil inlet tube 363, a cooling water inlet tube 364, a cooling channel 365, a cooling water outlet tube 366, a hot oil outlet tube 367, and an inclined surface 368, wherein the heating channel 362 is disposed on the left side of the inside of the rod body 361, and the cooling channel 365 is disposed on the right side of the inside of the rod body 361; the heating channel 362 and the cooling channel 365 are spirally disposed, and a hot oil inlet pipe 363 at one end of the heating channel 362 is fixedly disposed, a hot oil outlet pipe 367 at the other end of the heating channel 362 is fixedly disposed, one end of the cooling channel 365 is fixedly disposed with the cooling water inlet pipe 364, and the other end of the cooling channel 365 is fixedly disposed with the cooling water outlet pipe 366.

When the molten material is formed inside the die cavity 38, at the moment, the heating oil enters the heating channel 362 through the hot oil inlet pipe 363, and is discharged from the hot oil outlet pipe 367, the heating oil heats the material on the left side of the die cavity 38, and meanwhile, the forming pipeline on the right side of the die cavity 38 is cooled through the cooling channel 365 between demolding, so that the PVC pipe is hardened under the cooling operation of the cooling channel 365 when being demolded, the PVC pipe after demolding is deformed, and the forming quality of the PVC pipe is improved.

Cooling channel 365 forms the first cooling process of device, and cooling device 4 forms the second cooling process of device simultaneously, and twice cooling process simultaneous working can improve the shaping quality of PVC pipe, and the setting of twice cooling process simultaneously when improving the cooling effect to the PVC pipe, reduces cooling device's area, reduces the manufacturing cost of PVC pipe.

The seventh embodiment: as shown in fig. 3, the mold core 37 is an annular structure made of a metal material, the mold core 37 is sleeved on the right side of the rod 361, a threaded hole is formed in the right side of the rod 361, the nut 35 is screwed on the right side of the rod 361, and the mold core 37 is fixedly arranged on the rod 361 through the nut 35; the outer side of the rod 361 is provided with an inclined surface 368, the top of the inclined surface 368 is horizontally arranged with the mold core 37, and meanwhile, the inclination angle of the inclined surface 368 is 10 degrees.

The inclined surface 368 is provided so that the material enters the inside of the cavity 38 through the connecting tube 31, reducing the resistance to the movement of the material inside the cavity 38.

The specific implementation mode is eight: the second embodiment is further limited by the second embodiment, as shown in fig. 7-8, the cooling device 4 includes a cooling box 41, a cooling pipeline 42, a water pipe 43, a pressurizing pump 44, a bottom plate 45, a recovery pipe 46 and water outlet holes 47, the middle of the cooling pipeline 42 is hollow, the bottom plate 45 is disposed at the bottom of the cooling box 41, the inclination angle of the bottom plate 45 is 3 °, the cooling liquid recovery pipe 46 is installed at the lower left side of the bottom of the cooling box 41, a plurality of groups of water outlet holes 47 are uniformly formed in the inner wall surface of the cooling pipeline 42, and the cooling pipeline 42 is communicated with the pressurizing pump 44 through the water pipe 43.

Inside the PVC pipe enters into cooling duct 42, the switch of booster pump 44 starts this moment, and inside booster pump 44 poured into water pipe 43 with external cooling water to inside entering cooling duct 42, spout work in apopore 47 on the inner wall of cooling duct 42, carry out even water-cooling work to the position of all over the body of PVC pipe, the water after the cooling is discharged through recovery tube 46, the subsequent work of utilizing of being convenient for.

The specific implementation method nine: the second embodiment is further limited by the second embodiment, the cutting device 5 includes a hydraulic cylinder 51, a fixing frame 52, a through hole 53, a piston rod 54, a pressing device 55, a placing plate 56, two sets of holes 57, a blade 58 and a transverse plate 59, the pressing device 55 is disposed on two sides of the transverse plate 59, the placing plate 56 is provided with two sets of holes 57, the blade 58 is inserted into the holes 57, the pressing device 55 is composed of four parts, namely a limiting plate 551, a buffer spring 552, a pressing rod 553 and a pressing plate 554, the bottom of the pressing plate 554 is provided with an arc-shaped groove, the upper end of the pressing plate 554 is fixedly disposed with the pressing rod 553, the buffer spring 552 is sleeved on the outer side of the pressing rod 553, and the upper end of the pressing rod 553 passes through the transverse plate 59 and is fixedly disposed with the limiting plate 551.

Cutting device 5 is in the work, start the switch of pneumatic cylinder 51 this moment, pneumatic cylinder 51's piston rod 54 drives diaphragm 59 downstream, make blade 58 downstream, can carry out cutting work to the PVC pipe, when trompil 57 is inside is arranged in to the lower extreme of blade 58, accomplish the cutting work to the PVC pipe this moment, when blade 58 downstream, two sets of clamp plates 554 that support this moment support tightly in the both sides of PVC pipe, when making blade 58 cut the PVC pipe, the perk can not take place for the both sides of PVC pipe, the improvement is to the cutting quality of PVC pipe.

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. A preparation method of a PVC drain pipe comprises the following steps: preparing raw materials, preparing auxiliaries, stirring and mixing, extruding a die and cooling and forming, and is characterized in that:

2. The utility model provides a forming device is used in production of PVC drain pipe which characterized in that includes:

the device comprises a feeding device (1), wherein an extruding device (2) is fixedly arranged at the bottom of the feeding device (1), a forming device (3) is fixedly arranged on the right side of the extruding device (2), a cooling device (4) is fixedly arranged on the right side of the forming device (3), and a cutting device (5) is arranged on the right side of the cooling device (4);

the feeding device (1), a driving motor (11) is fixedly arranged at the upper end of a hopper (12) of the feeding device (1), an output shaft of the driving motor (11) is fixedly arranged with a discharging auger (15), and the discharging auger (15) is arranged in a feeding channel (14);

the extruding device (2) is characterized in that an extruding rod (22) is installed inside an extruding cylinder (21) of the extruding device (2), and the end part of the extruding rod (22) is fixedly arranged with an output shaft of an extruding motor;

the end part of a forming pipe (32) of the forming device (3) is fixedly arranged with the connecting pipe (31), a forming rod (36) is arranged in the connecting pipe (31), and the forming rod (36) is fixedly arranged in the forming pipe (32) through a fixing bolt (33);

the cooling device (4), a cooling pipeline (42) is arranged in a cooling box (41) at the outer side of the cooling device (4) through a bracket, the upper end of the cooling pipeline (42) is communicated with a water pipe (43), and a booster pump (44) is arranged at the top of the cooling box (41);

the PVC pipe cutting device comprises a cutting device (5), wherein a hydraulic cylinder (51) is installed on a fixing frame (52) of the cutting device (5), a piston rod (54) of the hydraulic cylinder (51) is fixedly arranged with a transverse plate (59), a blade (58) is fixedly connected to the bottom of the transverse plate (59) in a threaded mode, a placing plate (56) is installed at the bottom of the fixing frame (52), and a PVC pipe structure is placed on the surface of the placing plate (56).

3. The forming device for producing the PVC drain pipe according to claim 2, wherein: feed arrangement (1) includes driving motor (11), hopper (12), first hot plate (13), feedstock channel (14) and ejection of compact flood dragon (15), and feedstock channel (14) bottom and the feed inlet intercommunication setting of extruding cylinder (21), and feedstock channel (14) upper end and hopper (12) welded fastening simultaneously, fixed being provided with first hot plate (13) in the inner wall of feedstock channel (14).

4. The forming device for producing the PVC drain pipe according to claim 2, wherein: extrusion device (2) are including extruding a section of thick bamboo (21), extrusion pole (22), second hot plate (23) and intercommunication passageway (24), and extrude and pass through the screw fixation between the right-hand member of a section of thick bamboo (21) and intercommunication passageway (24), and the inside grafting of the right-hand member of intercommunication passageway (24) has connecting pipe (31) simultaneously, and the through-hole spiro union that the fixed screw tip passed on intercommunication passageway (24) is in the spiro union hole that connecting pipe (31) surface was seted up.

5. The forming device for producing the PVC drain pipe according to claim 2, wherein: forming device (3) are including connecting pipe (31), forming tube (32), fixing bolt (33), flange (34), nut (35), shaping pole (36), mold core (37) and die cavity (38), and shaping pole (36) left end sets up at forming tube (32) inner wall through three fixing bolt of group (33) are fixed, and three fixing bolt of group (33) are regular triangle-shaped and distribute.

6. The forming device for PVC drain pipe production according to claim 5, wherein: the forming rod (36) comprises a rod body (361), a heating channel (362), a hot oil inlet pipe (363), a cooling water inlet pipe (364), a cooling channel (365), a cooling water outlet pipe (366), a hot oil outlet pipe (367) and an inclined surface (368), the heating channel (362) is formed in the left side of the interior of the rod body (361), and the cooling channel (365) is formed in the right side of the interior of the rod body (361); the heating channel (362) and the cooling channel (365) are arranged spirally, a hot oil inlet pipe (363) at one end of the heating channel (362) is fixedly arranged, a hot oil outlet pipe (367) at the other end of the heating channel (362) is fixedly arranged, one end of the cooling channel (365) is fixedly arranged with a cooling water inlet pipe (364), and the other end of the cooling channel (365) is fixedly arranged with a cooling water outlet pipe (366).

7. The forming device for PVC drain pipe production according to claim 5, wherein: the die core (37) is of an annular structure made of metal materials, the die core (37) is sleeved on the right side of the rod body (361), meanwhile, a threaded hole is formed in the right side of the rod body (361), the nut (35) is in threaded connection with the right side of the rod body (361), and the die core (37) is fixedly arranged on the rod body (361) through the nut (35); inclined plane (368) has been seted up to the outside of body of rod (361), and the summit of inclined plane (368) and mold core (37) horizontal setting, and simultaneously, the inclination of inclined plane (368) is 10.

8. The forming device for producing the PVC drain pipe according to claim 2, wherein: cooling device (4) include cooler bin (41), cooling tube (42), water pipe (43), booster pump (44), bottom plate (45), recovery tube (46) and apopore (47), and cooler tube (42) middle part sets up for cavity, cooler bin (41) bottom is provided with bottom plate (45) simultaneously, the inclination of bottom plate (45) is 3, coolant liquid recovery tube (46) are installed to the bottom left side downside of cooler bin (41), multiunit apopore (47) have evenly been seted up on the inner wall surface of cooling tube (42), cooling tube (42) are through water pipe (43) and booster pump (44) intercommunication setting.

9. The forming device for producing the PVC drain pipe according to claim 2, wherein: the cutting device (5) comprises a hydraulic cylinder (51), a fixing frame (52), a through hole (53), a piston rod (54), a pressing device (55), a placing plate (56), an opening (57), a blade (58) and a transverse plate (59), wherein the pressing device (55) is arranged into two groups which are distributed on two sides of the transverse plate (59), the opening (57) is formed in the surface of the placing plate (56), the blade (58) is inserted into the opening (57), the pressing device (55) is composed of a limiting plate (551), a buffer spring (552), a pressing rod (553) and a pressing plate (554), an arc-shaped groove is formed in the bottom of the pressing plate (554), the upper end of the pressing plate (554) is fixedly arranged with the pressing rod (553), the buffer spring (552) is sleeved on the outer side of the pressing rod (553), and the upper end of the pressing rod (553) passes through the transverse plate (59) and is fixedly arranged with the limiting plate (551).

10. An application of a forming device for producing a PVC drain pipe in a preparation method of the PVC drain pipe.