CN114228107A

CN114228107A - PET bottle, production line and production process thereof

Info

Publication number: CN114228107A
Application number: CN202111499342.9A
Authority: CN
Inventors: 张志友
Original assignee: Jiangsu Chenji Packaging Co ltd
Current assignee: Jiangsu Chenji Packaging Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-03-25

Abstract

The invention discloses a production line of PET bottles, which relates to the technical field of PET bottle processing and comprises a blank supplying module, a conveying module, a heating module, a bottle blowing module and a control module for controlling the operation of the modules; the blank supplying module completes the production of bottle blanks; the conveying module comprises a first conveying belt, a circulating conveying device and a second conveying belt which are sequentially arranged, bottle blanks finished by the injection machine are taken and placed on the first conveying belt through a manipulator, the bottle blanks finished by the conveying of the first conveying belt are taken and placed on the circulating conveying device through the manipulator, the bottle blanks conveyed by the circulating conveying device sequentially pass through a heating module and a bottle blowing module to form bottle bodies, and the bottle bodies on the circulating conveying device are taken and placed on the second conveying belt through the manipulator; the heating module heats the bottle blank passing through, and during the heating of the bottle blank, the circulating conveying device drives the bottle blank to rotate; the bottle blowing module processes the bottle blank to form a bottle body. The invention realizes continuous automatic processing, improves the production efficiency and ensures the product quality.

Description

PET bottle, production line and production process thereof

Technical Field

The invention relates to the technical field of PET bottle body processing, in particular to a PET bottle body, a production line and a production process thereof.

Background

The plastic is the abbreviation of polyctylene terephthalate in English, PET or PETP for short. PET is the earliest, most productive, and most widely used polyester product.

At present, a two-step PET stretch blow molding machine with a simple structure is developed in China, and is matched with a general injection machine for use, and PET bottle blanks manufactured by the general injection machine are utilized for blowing PET biaxial stretching bottles. In a domestic two-step method biaxial stretching PET bottle blowing machine, the volume of the produced product is from a small bottle of dozens of milliliters to a large barrel of 5 gallons.

At present, when PET blow molding bottles are prepared in China, PET slices are firstly injection molded into bottle blanks, the proportion of secondary reclaimed materials is required to be not too high (below 5%), the reclaiming frequency is required to be not more than two times, the molecular weight and the viscosity are required to be not too low (the molecular weight is 31000-50000, and the intrinsic viscosity is 0.78-0.85cm3/g), and the injection molded bottle blanks are required to be stored for more than 48 hours for use. The bottle blank which is not used up after being heated must be stored for more than 48 hours for reheating use. The storage time of the bottle blank cannot exceed six months.

The important factors influencing the PET bottle body blow molding process are bottle blank, heating, pre-blowing, mold, environment and the like. Meanwhile, the production method needs a large amount of human resources, is low in efficiency, needs a large amount of turnover equipment in the production process, comprises a turnover box, a temporary storage space of a factory building and the like, is serious in packaging material waste in an intermediate link, and is difficult to solve along with material waste and auxiliary material cost.

Based on the problems, the production line of the PET bottle body and the production process thereof are designed to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a PET bottle body, a production line and a production process thereof.

In a first aspect, the invention discloses a production line of PET bottles, which adopts the following technical scheme:

a production line of PET bottles comprising:

a blank supply module; the blank supply module comprises a feeding device and an injection machine, the feeding device automatically finishes feeding the injection machine, and the injection machine finishes bottle blank production;

the bottle blank conveying device comprises a conveying module, a conveying module and a conveying module, wherein the conveying module comprises a first conveying belt, a second conveying belt and a circulating conveying device, the circulating conveying device is located between the first conveying belt and the second conveying belt, the bottle blank finished by the injection machine is taken and placed on the first conveying belt through a manipulator, the bottle blank conveyed by the first conveying belt is taken and placed on the circulating conveying device through the manipulator, the bottle blank conveyed by the circulating conveying device sequentially passes through a heating module and a bottle blowing module to form a bottle body, and the bottle body on the circulating conveying device is taken and placed on the second conveying belt through the manipulator;

a heating module; the heating module heats the bottle blank passing through, and the circulating conveying device drives the bottle blank to rotate during the bottle blank heating period;

a bottle blowing module; the bottle blowing module processes the bottle blank to form a bottle body;

and the control module controls the blank supplying module, the conveying module, the heating module and the bottle blowing module to operate.

Furthermore, the injection machine is a screw injection molding machine, and an electromagnetic heater is arranged on the outer wall of a machine barrel of the screw injection molding machine.

Further, circulating conveyor includes chain group and roating seat, chain group passes through motor drive operation, roating seat evenly distributed is in on chain group, and rotate and set up on chain group.

Further, circulating conveyor still includes drive gear and driven gear, drive gear rotates and sets up the arc department at the chain group, driven gear fixes on the roating seat, drive gear passes through motor drive, drive gear and the driven gear meshing that is located chain group arc department, drive gear drives the roating seat rotation that is located chain group arc department.

Further, heating module sets up the segmental arc department that has drive gear at chain group, heating module includes heating cavity, heating pipe and temperature sensor, the heating pipe distributes in heating cavity's both sides and top, temperature sensor sets up in heating cavity, the heating pipe is with the temperature in the temperature sensor cooperation control heating cavity.

Furthermore, the heating module further comprises an adjusting piece, and the adjusting piece adjusts the position distribution of the heating pipe in the heating cavity.

Furthermore, a plurality of bottle blowing modules are arranged on the circulating conveying device.

Furthermore, the first conveying belt comprises a slow conveying belt and a fast conveying belt which are located on the same line segment, bottle blanks on the slow conveying belt are conveyed to the fast conveying belt, and an infrared detector is arranged at one end, far away from the slow conveying belt, of the fast conveying belt.

In a second aspect, the invention discloses a production process of a PET bottle body, which adopts the following technical scheme:

a production process of PET bottles adopts any one of the production lines of PET bottles, and comprises the following steps:

s1, producing bottle blanks through an injection machine;

s2, conveying the bottle blank through a first conveying belt, and sucking the bottle blank to a circulating conveying device through a manipulator;

s3, conveying the bottle blanks by the circulating conveying device, heating the bottle blanks in the heating module, and driving the heated bottle blanks to rotate by the circulating conveying device;

s4, the heated bottle blank is sent to a bottle blowing module by the circulating conveying device, and the bottle processing is completed;

and S5, conveying the bottle bodies by the circulating conveying device, and sucking the bottle bodies onto a second conveying belt by a manipulator.

And S6, carrying out leak detection on the bottle bodies on the second conveying belt.

In a third aspect, the invention discloses a PET bottle body, which adopts the following technical scheme:

the utility model provides a PET bottle, the bottle can pile up each other, the bottle includes the body that is formed by the processing of PET material, the top of body is provided with bottle lid and handle, the bottle lid closes the opening part of body, the bottom of body sunken be formed with the positioning groove of bottle lid location, the body bottom is formed with dodges dodging the recess of dodging of handle.

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

in the two-step PET bottle production process, an injection machine and a bottle blowing machine are automatically connected, bottle blanks produced by the injection machine are placed on a conveying belt through a manipulator and are placed on a rotating table through the manipulator after being conveyed, the rotating table runs along with a chain set, after the rotating table enters a heating module, a driving gear is meshed with a driven gear on the rotating table, the driving gear rotates to drive the rotating table to rotate, the bottle blanks are uniformly heated in the heating process, and the processing quality of bottles is guaranteed; the PET bottle produced by the two-step method does not need aging treatment for 48 hours, and the bottle is directly blown, so that the phenomenon of disorder lines is avoided, and the working procedure is stable. In addition, the production process does not need to be circulated, and the waste of manpower and material resources is reduced.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

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

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a flow chart of the present invention;

FIG. 5 is a schematic structural view of a PET bottle body of the present invention, mainly showing the structure of a bottle mouth;

FIG. 6 is a schematic structural view of a PET bottle body according to the present invention, mainly showing the structure of the bottom of the bottle;

FIG. 7 is a schematic view showing the structure in which PET bottles are stacked one on another according to the present invention.

In the figure: 1. a blank supply module; 11. a feeding device; 12. an injection machine; 2. a delivery module; 21. a first conveyor belt; 211. a slow conveyor belt; 212. a rapid conveyor belt; 22. a circulating conveying device; 221. a chain group; 222. a rotating base; 223. a drive gear; 224. a driven gear; 23. a second conveyor belt; 3. a heating module; 31. a heating chamber; 32. heating a tube; 33. a temperature sensor; 34. an adjustment member; 4. a bottle blowing module; 5. a control module; 10. a bottle body; 20. a bottle cap; 30. a handle; 40. a positioning groove; 50. avoiding the groove.

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.

The invention discloses a production line of PET bottles.

As shown in fig. 1 to 3, the production line of PET bottles includes a control module 5, and a blank supplying module 1, a conveying module 2, a heating module 3 and a bottle blowing module 4 controlled by the control module 5, so as to realize the automatic processing control of the whole production line. The blank supply module 1, the conveying module 2, the heating module 3 and the bottle blowing module 4 are respectively provided with a control terminal which operates independently, and the control terminals are controlled by a control module 5.

Specifically, the blank supply module 1 comprises a feeding device 11 and an injection machine 12, wherein the feeding device 11 automatically finishes feeding the injection machine 12, and the injection machine 12 finishes bottle blank production.

The injection machine 12 is a screw injection machine, and an electromagnetic heater is arranged on the outer wall of a machine barrel of the screw injection machine. The feeding device 11 comprises a hopper and a material level sensor, the hopper is connected above a machine barrel of the screw injection molding machine, and the material level sensor is fixedly arranged in the hopper. The screw injection molding machine is a technical process of injecting plastic in a plasticized molten state into a closed mold cavity by means of the thrust of a screw, and obtaining a product after solidification and shaping.

Injection molding is a cyclic process, each cycle consisting essentially of: quantitative feeding, melting and plasticizing, pressure injection, mold filling and cooling, mold opening and part taking. And taking out the plastic part, closing the mold again, and performing the next cycle.

In addition, the raw materials need to be dehumidified and dried in the feeding process and enter a heat-insulating material barrel of the screw injection molding machine.

The bottle blank injection-molded by the screw injection molding machine is sucked by the mechanical arm and is placed on the conveying module 2. The manipulator is a mechanical structure with an XY-axis operation system and is provided with a starting sucker structure, so that the bottle blank is sucked and conveyed, and the bottle blank structure cannot be damaged in the process. The robot is of conventional construction and will not be described in great detail herein.

When preparing blow molding bottle, firstly, PET slice is injected and molded into bottle blank, the molecular weight and viscosity of the bottle blank can not be too low (molecular weight 31000 and 50000, and intrinsic viscosity is 0.78-0.85cm3/g), the quality of the bottle blank depends on the quality of PET material to a great extent, and the material which is easy to blow and shape is selected, and a reasonable bottle blank molding process is established. Experiments show that the imported raw materials of the bottle blank formed by the PET material with the same viscosity are easier to blow-mold than domestic materials.

The conveying module 2 comprises a first conveying belt 21, an endless conveying device 22 and a second conveying belt 23 which are arranged in sequence.

Specifically, the bottle blanks finished by the injection machine 12 are taken and placed on the first conveying belt 21 through the manipulator, the bottle blanks conveyed by the first conveying belt 21 are taken and placed on the circulating conveying device 22 through the manipulator, the bottle blanks conveyed by the circulating conveying device 22 sequentially pass through the heating module 3 and the bottle blowing module 4 to form bottle bodies, and the bottle bodies on the circulating conveying device 22 are taken and placed on the second conveying belt 23 through the manipulator.

In the production process, the preforms on the first conveyor 21 need to be supplied stably. First conveyer belt 21 is including being located the slow speed conveyer belt 211 and the fast speed conveyer belt 212 on the same line segment, and the bottle base on the slow speed conveyer belt 211 is carried to the fast speed conveyer belt 212 on, and the one end that the slow speed conveyer belt 211 was kept away from to the fast speed conveyer belt 212 is provided with infrared detector, and when infrared detector detected the bottle base, the bottle base was located the confession material level promptly, stopped the operation of fast speed conveyer belt 212 this moment to in the manipulator was got and is put bottle base to the endless conveyor 22. The working principle of the manipulator described above is the same as that of the manipulator described here.

In actual production, the two-section type conveying belt ensures that the bottle blanks are quickly conveyed to the feeding position.

In the present embodiment, the endless conveyor 22 includes a chain group 221, a rotary base 222, a drive gear 223, and a driven gear 224.

Chain group 221 level sets up and runs through motor drive, and roating seat 222 evenly distributed is in the outside of chain group 221, and roating seat 222 rotates and installs on chain group 221, and the top of roating seat 222 is formed with the location platform of going on fixing a position with the bottle base, runs through on the roating seat 222 and has seted up the venthole. The driving gear 223 is rotatably installed at the arc section of the chain set 221, the driven gear 224 is fixed on the rotary base 222, the driving gear 223 is driven by a motor, the driving gear 223 is meshed with the driven gear 224 located at the arc section of the chain set 221, and the driving gear 223 drives the rotary base 222 located at the arc section of the chain set 221 to rotate.

In use, the driving gear 223 drives the rotating seats 222 at the arc line of the chain set 221 to rotate synchronously, so that the bottle blanks on the rotating seats 222 rotate synchronously, and the bottle blanks can be heated uniformly in the heating process of the bottle blanks, thereby ensuring the quality of the bottle bodies processed from the bottle blanks.

The heating module 3 is arranged at the arc section of the chain group 221 with the driving gear 223, and heats the bottle blanks in the heating module 3, and the bottle blanks are driven to rotate by the circulating conveying device 22 during the bottle blank heating period.

Specifically, the heating module 3 includes a heating cavity, a heating pipe 32 and a temperature sensor 33, the heating pipe 32 is distributed on two sides and the top of the heating cavity, the temperature sensor 33 is fixedly installed in the heating cavity, and the heating pipe 32 and the temperature sensor 33 are matched to control the temperature in the heating cavity. In addition, the inner wall of the heating cavity is fixedly provided with a heat-insulating layer so as to reduce the loss of heat.

When different bottle blanks are heated, the position of the heating pipe 32 needs to be adjusted, and the bottle blanks are guaranteed to be uniformly heated. The heating module 3 further comprises an adjusting member 34, the adjusting member 34 adjusts the position distribution of the heating tube 32 in the heating cavity, and the adjusting member 34 may be a cylinder assembly, and the cylinder assembly is installed outside the heating cavity.

The heating temperature of the bottle blank is manually set and automatically adjusted. The heating tube 32 in the heating cavity is a far infrared lamp tube, and the far infrared lamp tube emits far infrared rays to radiate and heat the bottle blank. In addition, a fan can be installed at the bottom of the heating cavity for heat circulation, so that the temperature in the heating cavity is uniform.

The heating pipes 32 are uniformly distributed in the heating cavity, and according to the structure of the bottle blank, the heating pipes 32 are allocated to work, so that the heating pipes 32 on two sides of the heating cavity are generally in a shape of a 'district' from top to bottom, the two ends are more, the middle is less, the heat of the heating cavity is controlled by the number of opened lamp tubes, the whole temperature setting, the power and the heating ratio of each section, and the opening of the heating pipes 32 is adjusted by combining with the pre-blowing.

In this embodiment, the bottle blowing module 4 processes the bottle blank to form a bottle body, the bottle blowing module 4 includes openable and closable molds installed on both sides of the chain set 221, the heated bottle blank is conveyed to a forming station through the chain set 221, the forming mold is closed, and the bottle blank is blown by ventilating the vent hole on the rotary base 222, so that the bottle blank is processed into the bottle body. The forming die and the bottle blowing process are both the prior art, and are not described herein too much.

In this embodiment, the circulating conveyor 22 is provided with a plurality of bottle blowing modules 4, and the bottle blowing modules 4 may have the same structure or different structures. The bottle blowing modules 4 have the same structure, so that a plurality of bottle blanks can be conveniently processed; the bottle blowing module 4 has different structures and is used for processing different bottle blanks respectively.

In addition, the good or bad of the production environment has great influence on the process adjustment, the constant condition can maintain the stability of the process and the product, and the blow molding of the PET bottle is generally better under the conditions of room temperature and low humidity.

The specific implementation principle of the invention is as follows:

in the two-step PET bottle production process, an injection machine 12 and a bottle blowing machine are automatically connected, bottle blanks produced by the injection machine 12 are placed on a conveying belt through a manipulator and are placed on a rotating table through the manipulator after being conveyed, the rotating table runs along with a chain set 221, after the rotating table enters a heating module 3, a driving gear 223 is meshed with a driven gear 224 on the rotating table, the driving gear 223 rotates to drive the rotating table to rotate, the bottle blanks are uniformly heated in the heating process, and the processing quality of the bottles is guaranteed; the PET bottle produced by the two-step method does not need aging treatment for 48 hours, and the bottle is directly blown, so that the phenomenon of disorder lines is avoided, and the working procedure is stable. In addition, the production process does not need to be circulated, and the waste of manpower and material resources is reduced.

The invention also discloses a production process of the PET bottle body.

As shown in FIG. 4, the production process of PET bottles, which adopts the production line of PET bottles, comprises the following steps:

s1, producing bottle blanks through the injection machine 12, wherein the injection molding cycle is as follows: quantitative feeding, melting and plasticizing, pressure injection, mold filling and cooling, mold opening and part taking to form a bottle blank.

S2, the bottle blanks are sucked by the manipulator and placed on the first conveying belt 21, the first conveying belt 21 comprises a slow conveying belt 211 and a fast conveying belt 212, the bottle blanks on the slow conveying belt 211 are conveyed to the fast conveying belt 212, the bottle blanks are detected by an infrared detector on the fast conveying belt 212, the bottle blanks are located at a material loading position at the moment, and the fast conveying belt 212 stops running. The preforms are picked up by the robot and placed on the rotary base 222 on the endless conveyor 22.

After the manipulator carries the bottle blank, the fast conveyer belt 212 starts to operate to convey the next group of bottle blanks, and when the infrared detector detects the bottle blank, the fast conveyer belt 212 stops operating to enable the bottle blank to stay at the loading position to supply the bottle blank for the circulating conveyer 22.

S3, the circulating conveyor 22 includes a chain set 221, a rotary base 222, a driving gear 223 and a driven gear 224; the rotating seats 222 are uniformly distributed on the outer side of the chain set 221, the rotating seats 222 are rotatably mounted on the chain set 221, the driving gear 223 is located at the arc section on one side of the chain set 221, the driven gear 224 is fixed on the rotating table, and the driven gear 224 located at the arc section of the chain set 221 is meshed with the driving gear 223. The driving gear 223 is driven by a motor to drive the driven gear 224 to rotate, i.e. to drive the rotary base 222 and the bottle blank on the rotary base 222 to rotate.

The chain set 221 conveys the rotary base 222 and the bottle blanks on the rotary base 222, the bottle blanks enter the heating module 3 located at the arc section of the chain set 221 to be heated, and the rotating driving gear 223 drives the driven gear 224 to rotate, so that the rotary base 222 located in the heating module 3 and the bottle blanks on the rotary base 222 rotate.

S4, the chain group 221 on the circulating conveying device 22 sends the heated bottle blank into the bottle blowing module 4, and after the forming mold in the bottle blowing module 4 is closed, the air blowing operation is carried out on the bottle blank, so that the bottle blank is attached to the inner wall of the forming mold, and the bottle processing is completed.

S5, the chain set 221 of the circular conveyor 22 conveys the bottles, and the bottles are sucked onto the second conveyor 23 by the manipulator, thereby completing the conveying operation of the processed bottles.

And S6, carrying out leak detection on the bottles on the second conveying belt 23, and eliminating unqualified bottles to complete the processing of the bottles.

The invention also discloses a PET bottle body.

As shown in fig. 5 to 7, the PET bottles may be stacked up and down to reduce a space occupied by storing the bottles after the bottles are completely produced.

The bottle body includes a body 10 formed of a PET material, and the shape of the body 10 is not limited and may be cylindrical or prismatic, and generally, the body 10 has a cylindrical, hexagonal or octagonal shape for the sake of beauty of the body 10. In the present application, the body 10 has an octagonal prism shape.

In addition, an indent groove is formed on the surface of the actually produced bottle body 10 to ensure the structural strength of the bottle body 10, and meanwhile, the bottle body 10 is more beautiful.

A bottle opening is formed at the top of the bottle body 10, and the bottle opening may be located at the center of the end of the bottle body 10 or at other positions at the end of the bottle body 10.

The bottle body 10 is covered with a bottle cap 20 at the bottle mouth, and the bottle cap 20 and the bottle body 10 can be opened and closed in a split cover-rotating manner or in an integral lifting and pulling manner. In the present application, the bottle cap 20 and the bottle body 10 are opened and closed by screwing.

The bottle opening of the bottle body 10 is sleeved with a handle 30, the handle 30 can rotate along the bottle opening of the bottle body 10, and the handle 30 is convenient for lifting the bottle body.

The bottom of the bottle body 10 is concavely provided with a positioning groove 40 positioned with the bottle cap 20, the bottom of the bottle body 10 is provided with an avoiding groove 50 avoiding the handle 30, and the avoiding groove 50 and the positioning groove 40 form a coaxial stepped groove. When the bottles are stacked up and down, the bottom of the upper bottle is attached to the bottom surface of the lower bottle.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a production line of PET bottle which characterized in that includes:

a blank supply module (1); the blank supply module (1) comprises a feeding device (11) and an injection machine (12), wherein the feeding device (11) automatically finishes feeding the injection machine (12), and the injection machine (12) finishes bottle blank production;

the bottle blank conveying device comprises a conveying module (2), wherein the conveying module (2) comprises a first conveying belt (21), a second conveying belt (23) and a circulating conveying device (22), the circulating conveying device (22) is located between the first conveying belt (21) and the second conveying belt (23), a bottle blank finished by the injection machine (12) is taken and placed on the first conveying belt (21) through a manipulator, the bottle blank conveyed by the first conveying belt (21) is taken and placed on the circulating conveying device (22) through the manipulator, the bottle blank conveyed by the circulating conveying device (22) sequentially passes through a heating module (3) and a bottle blowing module (4) to form a bottle body, and the bottle body on the circulating conveying device (22) is taken and placed on the second conveying belt (23) through the manipulator;

a heating module (3); the heating module (3) heats the bottle blanks passing by, and the circulating conveying device (22) drives the bottle blanks to rotate during the bottle blank heating period;

a bottle blowing module (4); the bottle blowing module (4) processes the bottle blank to form a bottle body;

and the control module (5) controls the blank supplying module (1), the conveying module (2), the heating module (3) and the bottle blowing module (4) to operate.

2. The production line of PET bottles of claim 1, wherein said injection machine (12) is a screw injection machine, the outer wall of the barrel of said screw injection machine being provided with an electromagnetic heater.

3. The PET bottle production line according to claim 1 or 2, wherein the circulating conveyor (22) comprises a chain group (221) and rotating bases (222), the chain group (221) is driven by a motor to operate, and the rotating bases (222) are uniformly distributed on the chain group (221) and are rotatably arranged on the chain group (221).

4. The production line of PET bottles of claim 3, wherein said circulating conveyor (22) further comprises a driving gear (223) and a driven gear (224), said driving gear (223) is rotatably disposed at the arc section of the chain set (221), said driven gear (224) is fixed on said rotary base (222), said driving gear (223) is driven by a motor, said driving gear (223) is engaged with the driven gear (224) at the arc section of the chain set (221), said driving gear (223) drives the rotary base (222) at the arc section of the chain set (221) to rotate.

5. The production line of PET bottle bodies as claimed in claim 4, characterized in that the heating module (3) is arranged at an arc section of the chain set (221) with the driving gear (223), the heating module (3) comprises a heating cavity, heating pipes (32) and temperature sensors (33), the heating pipes (32) are distributed at two sides and the top of the heating cavity, the temperature sensors (33) are arranged in the heating cavity, and the heating pipes (32) and the temperature sensors (33) are matched to control the temperature in the heating cavity.

6. The production line of PET bottles of claim 5, wherein said heating module (3) further comprises an adjusting member (34), said adjusting member (34) adjusting the position distribution of the heating pipes (32) in the heating cavity.

7. The production line of PET bottles according to claim 1, characterized in that said circulating conveyor (22) is provided with a plurality of bottle blowing modules (4).

8. The production line of PET bottle bodies according to claim 1, wherein the first conveyor belt (21) comprises a slow conveyor belt (211) and a fast conveyor belt (212) which are positioned on the same line segment, bottle blanks on the slow conveyor belt (211) are conveyed onto the fast conveyor belt (212), and an infrared detector is arranged at one end of the fast conveyor belt (212) far away from the slow conveyor belt (211).

9. A production process of PET bottles, which adopts the production line of PET bottles of any one of claims 1 to 8, comprising the steps of:

s1, producing bottle blanks through an injection machine (12);

s2, conveying the bottle blanks through a first conveying belt (21), and sucking the bottle blanks to a circulating conveying device (22) through a manipulator;

s3, conveying the bottle blanks by the circulating conveying device (22), heating the bottle blanks in the heating module (3), and driving the heated bottle blanks to rotate by the circulating conveying device (22);

s4, the heated bottle blank is sent into a bottle blowing module (4) by the circulating conveying device (22) to finish the processing of the bottle body;

s5, conveying the bottles by the circulating conveying device (22), and sucking the bottles onto a second conveying belt (23) by a manipulator;

and S6, carrying out leak detection on the bottle bodies on the second conveying belt (23).

10. The utility model provides a PET bottle, its characterized in that includes, the bottle can pile up each other, the bottle includes body (10) that is formed by the processing of PET material, the top of body (10) is provided with bottle lid (20) and handle (30), bottle lid (20) lid closes the opening part of body (10), the bottom of body (10) is sunken be formed with positioning groove (40) of bottle lid (20) location, body (10) bottom is formed with dodges handle (30) dodge recess (50).