CN115625816A - A kind of dimensionally stable reinforced flame-retardant PET and its preparation method - Google Patents

Abstract

The invention discloses reinforced flame-retardant PET with stable size and a preparation method thereof, and belongs to the technical field of reinforced flame-retardant PET.

Description

A kind of dimensionally stable reinforced flame-retardant PET and its preparation method

technical field

The present invention relates to a reinforced flame-retardant PET, in particular to a dimensionally stable reinforced flame-retardant PET, the invention also relates to a method for preparing a reinforced flame-retardant PET, in particular to a dimensionally stable reinforced flame-retardant PET preparation The method belongs to the technical field of enhanced flame-retardant PET.

Background technique

PET plastic, referred to as PET or PETP, Chinese means: polyethylene terephthalate plastics, mainly including polyethylene terephthalate PET and polybutylene terephthalate PBT, polyethylene terephthalate Ester is also commonly known as polyester resin, which is a condensation polymer of terephthalic acid and ethylene glycol, and together with PBT is collectively referred to as thermoplastic polyester, or saturated polyester.

In the prior art, during the processing and production of PET plastics, it is necessary to perform cold water cooling treatment, then dry to remove surface moisture, and finally perform drying treatment, but the cold water cooling treatment cannot efficiently and completely For cooling treatment, a separate water pump is required for separate water supply treatment, and secondly, cutting requires a separate cutting equipment for cutting, and it is not convenient to dry with a separate drying vibration structure during drying. A dimensionally stable reinforced flame-retardant PET and its preparation method are designed to solve the above problems.

Contents of the invention

The main purpose of the present invention is to provide a dimensionally stable reinforced flame-retardant PET and its preparation method, by weighing 90-110 parts by weight of PET, 15-20 parts by weight of PC resin, 0-10 parts by weight of glass fiber, flame retardant 10-15 parts by weight, 0.3-1.0 parts by weight of modified carbon nanotubes, 5-10 parts by weight of modifier, 0.3-1 parts by weight of nucleating agent, stirring and mixing, extruding through a twin-screw extruder, and entering into the inner water-cooling cylinder, then start the double-headed motor to adjust the first output rotating rod to drive the adjustment gear to rotate, adjust the outer gear ring to drive the inner water-cooling cylinder to rotate through the adjustment gear, and further drive the first bevel gear to move through the movement of the double-headed motor. The movement of the second bevel gear is adjusted by the first bevel gear, the movement of the adjustment disc is adjusted by the second bevel gear, the movement of the hinge rod is adjusted by the adjustment disc, the movement of the piston up and down in the piston barrel is adjusted by the hinge rod, and the second one-way is opened by the movement of the piston. The valve enters the water in the pool into the piston barrel through the liquid inlet, and the first limit spring is opened by pressing the piston to introduce the cold water into the water pipe. The cold water enters into the sealing outer ring through the water pipe and enters through the sealing outer into the inner water-cooling cylinder, and then through the inner water-cooling cylinder and the spray nozzle to cool down the extruded and drawn raw materials, adjust the first vertical rod through the third bevel gear to drive the movement of the cutting knife, and adjust the rotation of the cutting knife to pass through The raw material strips of the inner water cooling cylinder are cut into granules, and the cut granulated raw materials fall onto the vibrating filter plate, which drives the vibration of the vibrating filter plate, and simultaneously starts the drying fan and the side heating plate for heating and drying to prepare a reinforced resistance Burn PET.

The purpose of the present invention can be achieved by adopting the following technical solutions:

A dimensionally stable reinforced flame-retardant PET, comprising the following raw materials in parts by weight:

PET90-110 parts by weight, PC resin 15-20 parts by weight, glass fiber 0-10 parts by weight, flame retardant 10-15 parts by weight, modified carbon nanotubes 0.3-1.0 parts by weight, modifier 5-10 parts by weight , 0.3-1 parts by weight of nucleating agent.

Preferably, the preparation method includes the use of equipment as follows, the use equipment includes an outer sleeve, the inner top and inner bottom of the outer sleeve are installed with a rotating spraying cylinder assembly through a connecting bearing, and the top of one side of the outer sleeve is A double-headed motor assembly is installed through the motor frame, and one output end of the double-headed motor assembly cooperates with the rotating spray cylinder assembly through a gear plate assembly, and the other output end of the double-headed motor assembly is driven and adjusted by a bevel gear assembly. Disc assembly, below the adjustment disc assembly, there is a piston cylinder assembly that can be driven by the adjustment disk assembly, the input end of the piston cylinder assembly communicates with the rotating spray cylinder assembly through the introduction pipe assembly, and the bevel gear assembly also drives As for the cutter assembly, an L-shaped side frame is installed at the side bottom of the outer sleeve, and a drying bin is installed at the bottom of the L-shaped side frame, and a vibrating filter assembly is arranged at the inner bottom of the drying bin , a drying fan is installed at the inner middle of the drying bin.

Preferably, the rotating spray cylinder assembly includes an inner water cooling cylinder and a spray head, an internal water cooling cylinder is installed above and below the inner wall of the outer sleeve through connecting bearings, and the inside of the internal water cooling cylinder is connected with spray heads at equal intervals.

Preferably, the double-head motor assembly includes a double-head motor, a first output shaft and a lower shaft, the motor frame is equipped with a double-head motor, and the top output end of the double-head motor is equipped with a first output shaft. A lower rotating shaft is installed at the bottom output end of the double-headed motor, and a gear plate assembly is installed at the top of the first output rotating rod.

Preferably, the gear plate assembly includes an adjustment gear and an external gear ring, the outer top of the inner water cooling cylinder is installed with the outer gear ring, the top of the first output shaft is installed with an adjustment gear, and the adjustment gear part It is located inside the outer sleeve and meshes with the outer gear ring.

Preferably, the bevel gear assembly includes a first bevel gear, a second bevel gear and a third bevel gear, the bottom of the lower shaft is equipped with a first bevel gear, and the outside of the first bevel gear is meshed with a second bevel gear, And the bottom of the second bevel gear is meshed with a third bevel gear, and a cutting knife assembly is installed at the middle of the bottom of the third bevel gear.

Preferably, the adjustment disc assembly includes an adjustment disc, a hinged rod and a connecting cross bar, a connecting cross bar is installed at the middle of one side of the second bevel gear, and an adjusting disc is installed at the other end of the connecting cross bar. A hinged rod is hinged at the edge of the adjusting disc, and a piston barrel assembly is hinged at the bottom of the hinged rod.

Preferably, the piston barrel assembly includes a piston, a piston barrel, a second limit spring, a first one-way valve, a first limit spring and a second one-way valve, and liquid inlets are respectively opened on both sides of the bottom of the piston barrel and a liquid outlet, wherein a second one-way valve is built in the liquid inlet, and a second limit spring is provided between the second one-way valve and the piston barrel, and a first one-way valve is built in the liquid outlet, and the second A first limit spring is arranged between a one-way valve and the piston barrel, and a piston that can slide in the piston barrel is arranged inside the piston barrel, and the bottom of the hinge rod and the top middle of the piston The liquid outlet is hinged, and the liquid outlet communicates with the inner water cooling cylinder through the inlet pipe assembly.

Preferably, the inlet pipe assembly includes an inlet water pipe and a sealed outer ring, the bottom of the liquid outlet is connected to an inlet water pipe, the other end of the inlet water pipe passes through the outer sleeve and communicates with a sealed outer ring, and the sealed outer ring The ring is inserted into the interior of the inner water-cooling cylinder and communicates with the inner water-cooling cylinder;

The cutting knife assembly includes a first vertical rod and a cutting knife, a first vertical rod is installed at the bottom middle of the third bevel gear, and three sets of cutting knives are arranged at equal intervals at the bottom of the first vertical rod;

An L-shaped support frame is installed at the side middle part of the outer sleeve, and the L-shaped support frame is equipped with a first vertical bar and a connecting cross bar through a bearing;

The vibrating filter screen assembly includes a vibrating filter plate, a vibrating spring and an inner support ring, an inner support ring is installed at the inner bottom of the drying bin, a vibrating spring is installed at the top of the inner support ring, and the top of the vibrating spring A vibrating filter plate is installed at the place;

A side heating plate is installed on the inner wall of the drying bin, and an electric heater is installed at the outer middle of the drying bin, and the electric heater is electrically connected to the side heating plate.

A method for preparing a dimensionally stable reinforced flame-retardant PET, comprising the steps of:

Step 1: By weighing 90-110 parts by weight of PET, 15-20 parts by weight of PC resin, 0-10 parts by weight of glass fiber, 10-15 parts by weight of flame retardant, 0.3-1.0 parts by weight of modified carbon nanotubes, modified 5-10 parts by weight of agent and 0.3-1 part by weight of nucleating agent are stirred and mixed and extruded through a twin-screw extruder;

Step 2: After extruding, enter the inner water cooling cylinder, then start the double-headed motor to adjust the first output shaft to drive the adjustment gear to rotate, and adjust the outer gear ring through the adjustment gear to drive the inner water cooling cylinder to rotate;

Step 3: The movement of the double-head motor further drives the movement of the first bevel gear, the movement of the second bevel gear is adjusted through the first bevel gear, and the movement of the adjustment disc is adjusted through the second bevel gear;

Step 4: Adjust the movement of the articulated rod through the adjusting disc, and adjust the movement of the piston up and down in the piston cylinder through the articulated rod;

Step 5: Open the second one-way valve through the movement of the piston to allow the water in the pool to enter the piston cylinder through the liquid inlet, and open the first limit spring by pressing the piston to introduce cold water into the water inlet pipe;

Step 6: Cold water enters the sealed outer ring through the water pipe, enters the inner water-cooled cylinder through the sealed outer ring, and then sprays out through the inner water-cooled cylinder with the nozzle to cool down the extruded and drawn raw materials;

Step 7: Adjust the first vertical rod through the third bevel gear to drive the movement of the cutting knife, and adjust the rotation of the cutting knife to cut the raw material strips passing through the inner water cooling cylinder into granules;

Step 8: The cut and granulated raw materials fall onto the vibrating filter plate, which drives the vibration of the vibrating filter plate, and synchronously starts the drying fan and side heating plate for heating and drying treatment to prepare reinforced flame-retardant PET.

Beneficial technical effect of the present invention:

The invention provides a dimensionally stable reinforced flame-retardant PET and its preparation method, by weighing 90-110 parts by weight of PET, 15-20 parts by weight of PC resin, 0-10 parts by weight of glass fiber, and 10-15 parts by weight of flame retardant 0.3-1.0 parts by weight of modified carbon nanotubes, 5-10 parts by weight of modifiers, and 0.3-1 parts by weight of nucleating agents are stirred and mixed and extruded through a twin-screw extruder, and then enter into the inner water cooling cylinder Then start the double-head motor to adjust the first output shaft to drive the adjustment gear to rotate, adjust the outer gear ring through the adjustment gear to drive the inner water-cooled cylinder to rotate, the movement of the double-head motor further drives the first bevel gear to move, and the first bevel gear Adjust the movement of the second bevel gear, adjust the movement of the adjustment disc through the second bevel gear, adjust the movement of the hinge rod through the adjustment disc, adjust the movement of the piston up and down in the piston cylinder through the hinge rod, and open the second one-way valve through the movement of the piston. The water enters into the piston barrel through the liquid inlet, and the first limit spring is opened by pressing the piston to introduce cold water into the water pipe. The cold water enters the sealed outer ring through the water pipe, and enters the inner water cooling cylinder through the sealed outer ring. Then, the extruded wire-drawn raw material is cooled through the inner water cooling cylinder and the spray nozzle, and the first vertical rod is adjusted through the third bevel gear to drive the cutting knife to move, and the cutting knife is adjusted to rotate through the inner water cooling cylinder. The raw material strips are cut into granules, and the granulated raw materials fall onto the vibrating filter plate, which drives the vibration of the vibrating filter plate, and simultaneously starts the drying fan and the side heating plate for heating and drying to prepare enhanced flame-retardant PET.

Description of drawings

Fig. 1 is according to a kind of dimensionally stable reinforced flame-retardant PET of the present invention and the device overall structure schematic diagram of a preferred embodiment of preparation method thereof;

Fig. 2 is a schematic structural view of a vibration drying assembly according to a preferred embodiment of a dimensionally stable reinforced flame-retardant PET and a preparation method thereof of the present invention;

Fig. 3 is a schematic diagram of the combined structure of a cutting assembly, a water cooling assembly, a pumping assembly and a bevel gear linkage assembly according to a preferred embodiment of a dimensionally stable reinforced flame-retardant PET and a preparation method thereof of the present invention;

Fig. 4 is according to a kind of size-stable reinforced flame-retardant PET of the present invention and a preferred embodiment of preparation method thereof the enlarged view of the structure at place a;

Figure 5 is an enlarged view of the structure at b of a preferred embodiment of a dimensionally stable reinforced flame-retardant PET and a preparation method thereof according to the present invention;

Fig. 6 is an enlarged view of the structure at point c of a preferred embodiment of a dimensionally stable reinforced flame-retardant PET and its preparation method according to the present invention.

In the figure: 1-outer sleeve, 2-L-shaped side frame, 3-drying chamber, 4-side heating plate, 5-vibrating filter plate, 6-vibrating spring, 7-drying fan, 8-first vertical Rod, 9-cutting knife, 10-adjusting gear, 11-inner water cooling cylinder, 12-nozzle, 13-adjusting disc, 14-piston, 15-piston barrel, 16-L-shaped support frame, 17-seal outer ring, 18 -inner support ring, 19-first bevel gear, 20-second bevel gear, 21-third bevel gear, 22-hinged rod, 23-first output rotating rod, 24-double-head motor, 25-motor frame, 26-connecting bearing, 27-the first one-way valve, 28-the second one-way valve, 29-the second limit spring, 30-the first limit spring, 31-import water pipe, 32-external gear ring.

Detailed ways

In order to make the technical solutions of the present invention clearer and clearer to those skilled in the art, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in Figures 1-6, a dimensionally stable reinforced flame-retardant PET provided in this embodiment includes the following raw materials in parts by weight:

PET90-110 parts by weight, PC resin 15-20 parts by weight, glass fiber 0-10 parts by weight, flame retardant 10-15 parts by weight, modified carbon nanotubes 0.3-1.0 parts by weight, modifier 5-10 parts by weight , 0.3-1 parts by weight of nucleating agent.

In this embodiment, the preparation method includes the use of equipment as follows, the use equipment includes an outer sleeve 1, the inner top and inner bottom of the outer sleeve 1 are equipped with a rotating spraying cylinder assembly through a connecting bearing 26, the outer sleeve 1 A double-headed motor assembly is installed on the top of one side through the motor frame 25. One output end of the double-headed motor assembly cooperates with the rotating spray cylinder assembly through a gear plate assembly, and the other output end of the double-headed motor assembly is driven by a bevel gear assembly. There is an adjustment disc assembly, and a piston cylinder assembly that can be driven by the adjustment disk assembly is arranged under the adjustment disk assembly. The input end of the piston cylinder assembly communicates with the rotating spray cylinder assembly through the introduction pipe assembly, and the bevel gear assembly also drives the cutting knife assembly. The side bottom of the outer sleeve 1 is equipped with an L-shaped side frame 2, and the bottom of the L-shaped side frame 2 is equipped with a drying bin 3, and the inner bottom of the drying bin 3 is provided with a vibrating filter assembly, and the drying bin 3 A drying blower fan 7 is installed at the inner middle part.

By weighing PET90-110 parts by weight, PC resin 15-20 parts by weight, glass fiber 0-10 parts by weight, flame retardant 10-15 parts by weight, modified carbon nanotubes 0.3-1.0 parts by weight, modifier 5- 10 parts by weight and 0.3-1 parts by weight of nucleating agent are stirred and mixed and extruded through a twin-screw extruder. The gear 10 rotates, the outer gear ring 32 is adjusted by the adjustment gear 10 to drive the inner water cooling cylinder 11 to rotate, the movement of the double-headed motor 24 further drives the movement of the first bevel gear 19, and the movement of the second bevel gear 20 is adjusted by the first bevel gear 19. The second bevel gear 20 is used to adjust the movement of the adjusting disc 13, the adjusting disc 13 is used to adjust the movement of the hinged rod 22, the hinged rod 22 is used to adjust the movement of the piston 14 up and down in the piston cylinder 15, and the movement of the piston 14 opens the second one-way valve 28. The water in the pool enters into the piston barrel 15 through the liquid inlet, and the first limit spring 30 is opened by pressing the piston 14 to introduce cold water into the water inlet pipe 31, and the cold water enters into the sealed outer ring 17 through the water inlet pipe 31, and passes The sealed outer ring 17 enters the inner water-cooling cylinder 11, and then the inner water-cooling cylinder 11 cooperates with the nozzle 12 to spray out the extruded and drawn raw materials to cool down, and the third bevel gear 21 is used to adjust the first vertical rod 8 to drive the cutting knife 9 movement, cutting and granulating the raw material strips passing through the inner water cooling cylinder 11 by adjusting the rotation of the cutting knife 9, and the cut and granulated raw materials fall onto the vibrating filter plate 5, driving the vibration of the vibrating filter plate 5, and starting the drying synchronously The drying blower 7 and the side heating plate 4 are heated and dried to prepare enhanced flame-retardant PET.

In this embodiment, the rotating spray cylinder assembly includes an inner water cooling cylinder 11 and a spray head 12. The inner water cooling cylinder 11 is installed above and below the inner wall of the outer sleeve 1 through connecting bearings 26, and the inside of the inner water cooling cylinder 11 is communicated with Nozzle12.

In this embodiment, the double-head motor assembly includes a double-head motor 24, a first output shaft 23 and a lower shaft, the motor frame 25 is equipped with a double-head motor 24, and the top output end of the double-head motor 24 is equipped with a first output shaft Rod 23, the bottom output end of double-headed motor 24 is equipped with lower rotating shaft, and the top place of the first output rotating rod 23 is equipped with gear disc assembly.

In this embodiment, the gear plate assembly includes an adjusting gear 10 and an external gear ring 32, the outer gear ring 32 is installed on the top of the inner water cooling cylinder 11, the adjusting gear 10 is installed on the top of the first output shaft 23, and The adjustment gear 10 is partly located inside the outer sleeve 1 and meshes with the outer gear ring 32 .

In this embodiment, the bevel gear assembly includes a first bevel gear 19, a second bevel gear 20, and a third bevel gear 21. The bottom of the lower shaft is equipped with the first bevel gear 19, and the outer side of the first bevel gear 19 is engaged with the second bevel gear. Two bevel gears 20, and the bottom of the second bevel gear 20 is meshed with a third bevel gear 21, and a cutting knife assembly is installed at the bottom middle of the third bevel gear 21.

In this embodiment, the adjusting disc assembly includes an adjusting disc 13, a hinged rod 22 and a connecting cross bar. A connecting cross bar is installed at the middle of one side of the second bevel gear 20, and an adjusting disc 13 is installed at the other end of the connecting cross bar. A hinged rod 22 is hinged at the edge of the adjusting disc 13, and a piston barrel assembly is hinged at the bottom of the hinged rod 22.

In this embodiment, the piston barrel assembly includes the piston 14, the piston barrel 15, the second limit spring 29, the first check valve 27, the first limit spring 30 and the second check valve 28, and the bottom of the piston barrel 15 The two sides are respectively provided with a liquid inlet and a liquid outlet, wherein a second one-way valve 28 is built in the liquid inlet, and a second limit spring 29 is arranged between the second one-way valve 28 and the piston cylinder 15, and the outlet A first one-way valve 27 is built in the liquid port, and a first limit spring 30 is provided between the first one-way valve 27 and the piston cylinder 15, and a piston 14 that can slide in the piston cylinder 15 is provided inside the piston cylinder 15. , the bottom of the hinge rod 22 is hinged with the top middle of the piston 14, and the liquid outlet communicates with the inner water cooling cylinder 11 through the inlet tube assembly.

In this embodiment, the inlet pipe assembly includes an inlet water pipe 31 and a sealing outer ring 17. The bottom of the liquid outlet is connected to the inlet water pipe 31, and the other end of the inlet pipe 31 passes through the outer sleeve 1 and communicates with the sealing outer ring 17, and is sealed. The outer ring 17 is inserted into the interior of the inner water cooling cylinder 11 and communicated with the inner water cooling cylinder 11;

The cutting knife assembly comprises a first vertical bar 8 and a cutting knife 9, the first vertical bar 8 is installed at the bottom middle part of the third bevel gear 21, and the bottom of the first vertical bar 8 is equidistantly provided with three groups of cutting knives 9;

An L-shaped support frame 16 is installed at the side middle part of the outer sleeve 1, and the L-shaped support frame 16 is equipped with a first vertical bar 8 and a connecting cross bar through a bearing;

The vibrating filter screen assembly comprises a vibrating filter plate 5, a vibrating spring 6 and an inner support ring 18, an inner support ring 18 is installed at the inner bottom of the drying bin 3, and a vibrating spring 6 is installed at the top of the inner support ring 18, and the vibrating spring 6 A vibrating filter plate 5 is installed at the top;

A side heating plate 4 is installed on the inner wall of the drying bin 3 , and an electric heater is installed at the outer middle of the drying bin 3 , and the electric heater is electrically connected to the side heating plate 4 .

A method for preparing a dimensionally stable reinforced flame-retardant PET, comprising the steps of:

Step 1: By weighing 90-110 parts by weight of PET, 15-20 parts by weight of PC resin, 0-10 parts by weight of glass fiber, 10-15 parts by weight of flame retardant, 0.3-1.0 parts by weight of modified carbon nanotubes, modified 5-10 parts by weight of agent and 0.3-1 part by weight of nucleating agent are stirred and mixed and extruded through a twin-screw extruder;

Step 2: After extruding, enter the inner water cooling cylinder 11, then start the double-headed motor 24 to adjust the first output rotating rod 23 to drive the adjustment gear 10 to rotate, and adjust the outer gear ring 32 through the adjustment gear 10 to drive the inner water cooling cylinder 11 to rotate;

Step 3: the movement of the first bevel gear 19 is further driven by the movement of the double-headed motor 24, the movement of the second bevel gear 20 is adjusted by the first bevel gear 19, and the movement of the adjustment disc 13 is adjusted by the second bevel gear 20;

Step 4: adjust the movement of the hinge rod 22 through the adjustment disc 13, and adjust the movement of the piston 14 up and down in the piston cylinder 15 through the hinge rod 22;

Step 5: Open the second one-way valve 28 through the movement of the piston 14 to allow the water in the pool to enter the piston barrel 15 through the liquid inlet, and open the first limit spring 30 by pressing the piston 14 to introduce cold water into the water inlet pipe 31 Inside;

Step 6: Cold water enters into the sealed outer ring 17 through the water inlet pipe 31, enters into the inner water cooling cylinder 11 through the sealed outer ring 17, and then sprays out through the inner water cooling cylinder 11 with the nozzle 12 to cool down the extruded drawing raw material deal with;

Step 7: Adjust the first vertical rod 8 through the third bevel gear 21 to drive the movement of the cutting knife 9, and adjust the rotation of the cutting knife 9 to cut the raw material strips passing through the inner water cooling cylinder 11 into granules;

Step 8: The cut and granulated raw materials fall onto the vibrating filter plate 5 to drive the vibration of the vibrating filter plate 5, and simultaneously start the drying fan 7 and the side heating plate 4 for heating and drying treatment to prepare enhanced flame-retardant PET.

The above are only further embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field shall, within the scope disclosed by the present invention, make further improvements according to the technical scheme of the present invention and its design. Equivalent replacements or changes all belong to the protection scope of the present invention.

Claims (10)

1. A dimensionally stable, reinforced, flame retardant PET characterized by: the feed comprises the following raw materials in parts by weight:

90-110 parts of PET, 15-20 parts of PC resin, 0-10 parts of glass fiber, 10-15 parts of flame retardant, 0.3-1.0 part of modified carbon nanotube, 5-10 parts of modifier and 0.3-1 part of nucleating agent.

2. The method for preparing the dimensionally stable reinforced flame retardant PET as set forth in claim 1, wherein: the preparation method comprises the following using equipment, wherein the using equipment comprises an outer sleeve (1), a rotary spraying barrel assembly is installed at the inner top and the inner bottom of the outer sleeve (1) through a connecting bearing (26), a double-head motor assembly is installed at the top of one side of the outer sleeve (1) through a motor frame (25), an output end of the double-head motor assembly is matched with the rotary spraying barrel assembly through a gear disc assembly, the other output end of the double-head motor assembly is driven by a bevel gear assembly to form an adjusting disc assembly, a piston barrel assembly which can be driven by the adjusting disc assembly is arranged below the adjusting disc assembly, an input end of the piston barrel assembly is communicated with the rotary spraying barrel assembly through a lead-in pipe assembly, the bevel gear assembly is further driven by a cutting knife assembly, an L-shaped side frame (2) is installed at the bottom of the side of the outer sleeve (1), a drying bin (3) is installed at the bottom of the L-shaped side frame (2), a vibration filter screen assembly is arranged at the inner bottom of the drying bin (3), and a drying fan (7) is installed at the inner middle of the drying bin (3).

3. The method for preparing the dimensionally stable reinforced flame retardant PET as set forth in claim 2, wherein: the rotary spraying barrel assembly comprises an inner water cooling barrel (11) and a spray head (12), the inner water cooling barrel (11) is installed above and below the inner wall of the outer sleeve (1) through a connecting bearing (26), and the spray head (12) is communicated with the inside of the inner water cooling barrel (11) at equal intervals.

4. The method for preparing the dimensionally stable reinforced flame retardant PET as claimed in claim 3, wherein: double-end motor subassembly includes double-end motor (24), first output bull stick (23) and lower pivot, double-end motor (24) are installed in motor frame (25), first output bull stick (23) are installed to the top output of double-end motor (24), the lower pivot is installed to the end output of double-end motor (24), the gear disc subassembly is installed to the top department of first output bull stick (23).

5. The method for preparing the reinforced flame-retardant PET with stable dimension according to the claim 4 is characterized in that: the toothed disc subassembly includes adjusting gear (10) and outer gear ring (32), outer gear ring (32) are installed to the outside top department of interior water-cooling section of thick bamboo (11), adjusting gear (10) are installed to the top department of first output bull stick (23), just adjusting gear (10) part is located the inboard of outer sleeve (1) and with outer gear ring (32) intermeshing.

6. The method for preparing the reinforced flame-retardant PET with stable dimension according to the claim 5 is characterized in that: the bevel gear subassembly includes first bevel gear (19), second bevel gear (20) and third bevel gear (21), first bevel gear (19) are installed to the bottom of pivot down, the outside meshing of first bevel gear (19) has second bevel gear (20), just the bottom meshing of second bevel gear (20) has third bevel gear (21), the bottom middle part department of third bevel gear (21) installs the cutter subassembly.

7. The method for preparing the dimensionally stable reinforced flame retardant PET as claimed in claim 6, wherein: the adjusting disk subassembly includes adjusting disk (13), hinge bar (22) and connects the horizontal pole, one side middle part department of second bevel gear (20) installs the connection horizontal pole, and adjusting disk (13) are installed to the other end of this connection horizontal pole, limit portion department of adjusting disk (13) articulates there is hinge bar (22), the bottom of hinge bar (22) articulates there is the piston barrel subassembly.

8. The method for preparing the dimensionally stable reinforced flame retardant PET as set forth in claim 7, wherein: piston cylinder subassembly includes piston (14), piston cylinder (15), the spacing spring of second (29), first check valve (27), first spacing spring (30) and second check valve (28), inlet and liquid outlet have been seted up respectively to the bottom both sides of piston cylinder (15), and wherein the inlet embeds there is second check valve (28), and is equipped with second spacing spring (29) between second check valve (28) and piston cylinder (15), and wherein the liquid outlet embeds there is first check valve (27), and is equipped with first spacing spring (30) between first check valve (27) and piston cylinder (15), the inside of piston cylinder (15) is equipped with can piston (14) that slide in piston cylinder (15), the bottom of hinge bar (22) with the top middle part department of piston (14) is articulated, the liquid outlet through leading-in pipe subassembly with interior water-cooling cylinder (11) intercommunication.

9. The process of claim 8 for preparing a dimensionally stable reinforced flame retardant PET, wherein: the water inlet pipe assembly comprises a water inlet pipe (31) and a sealing outer ring (17), the bottom of the liquid outlet is communicated with the water inlet pipe (31), the other end of the water inlet pipe (31) penetrates through the outer sleeve (1) and is communicated with the sealing outer ring (17), and the sealing outer ring (17) is inserted into the inner water cooling cylinder (11) and is communicated with the inner water cooling cylinder (11);

the cutting knife assembly comprises a first vertical rod (8) and cutting knives (9), the first vertical rod (8) is installed in the middle of the bottom of the third bevel gear (21), and three groups of cutting knives (9) are arranged at the bottom of the first vertical rod (8) at equal intervals;

an L-shaped support frame (16) is installed in the middle of the side of the outer sleeve (1), and a first vertical rod (8) and a connecting cross rod are installed on the L-shaped support frame (16) through a bearing;

the vibration filter screen component comprises a vibration filter screen (5), a vibration spring (6) and an inner support ring (18), the inner support ring (18) is installed at the inner bottom of the drying bin (3), the vibration spring (6) is installed at the top of the inner support ring (18), and the vibration filter screen (5) is installed at the top of the vibration spring (6);

side heating board (4) are installed to the inner wall in stoving storehouse (3), just the outside middle part department in stoving storehouse (3) installs electric heater, this electric heater electric connection side heating board (4).

10. The process of claim 9 for preparing a dimensionally stable reinforced flame retardant PET, wherein: the method comprises the following steps:

the method comprises the following steps: by weighing 90-110 parts by weight of PET, 15-20 parts by weight of PC resin, 0-10 parts by weight of glass fiber, 10-15 parts by weight of flame retardant, 0.3-1.0 part by weight of modified carbon nanotube, 5-10 parts by weight of modifier and 0.3-1 part by weight of nucleating agent, stirring, mixing, and extruding by a double-screw extruder;

step two: after extrusion, the extruded mixture enters an inner water cooling cylinder (11), then a double-end motor (24) is started to adjust a first output rotating rod (23) to drive an adjusting gear (10) to rotate, and an outer gear ring (32) is adjusted through the adjusting gear (10) to drive the inner water cooling cylinder (11) to rotate;

step three: the first bevel gear (19) is further driven to move through the movement of the double-head motor (24), the second bevel gear (20) is adjusted to move through the first bevel gear (19), and the adjusting disc (13) is adjusted to move through the second bevel gear (20);

step four: the adjusting disc (13) is used for adjusting the hinge rod (22) to move, and the hinge rod (22) is used for adjusting the piston (14) to move up and down in the piston cylinder (15);

step five: the second one-way valve (28) is opened through the movement of the piston (14) to enable water in the water tank to enter the piston cylinder (15) through the liquid inlet, and the first limiting spring (30) is opened through pressing the piston (14) to enable cold water to be led into the water leading-in pipe (31);

step six: cold water enters the sealing outer ring (17) through the water inlet pipe (31), enters the inner water cooling cylinder (11) through the sealing outer ring (17), and is sprayed out through the inner water cooling cylinder (11) and the spray head (12) to perform cooling treatment on the extruded raw materials after wire drawing;

step seven: the first vertical rod (8) is adjusted through the third bevel gear (21) to drive the cutting knife (9) to move, and the cutting knife (9) is adjusted to rotate to cut the raw material strips passing through the inner water cooling cylinder (11) into granules;

step eight: the cut and granulated raw materials fall onto the vibration filter plate (5) to drive the vibration of the vibration filter plate (5), and the drying fan (7) and the side heating plate (4) are synchronously started to carry out heating and drying treatment to prepare the reinforced flame-retardant PET.

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