CN117565365A

CN117565365A - Plastic bottle embryo heating device

Info

Publication number: CN117565365A
Application number: CN202311709282.8A
Authority: CN
Inventors: 印雄飞; 王至诚; 樊振宇; 刘旭辉; 林成翰; 李家庆
Original assignee: Hangzhou Institute of Advanced Studies of UCAS
Current assignee: Hangzhou Institute of Advanced Studies of UCAS
Priority date: 2023-12-12
Filing date: 2023-12-12
Publication date: 2024-02-20

Abstract

The invention relates to the technical manufacturing field of plastic bottle blanks, in particular to a plastic bottle blank heating device, which comprises: the side wall of the inner cavity of the heating cavity is covered with a reflecting mirror surface; the laser array is arranged on the side wall of the heating cavity, the light emitting direction of the laser array faces into the heating cavity, and an included angle between the light emitting direction of the laser array and the inner side wall of the heating cavity facing the light emitting direction of the laser array is an acute angle. Through with laser injection in the heating cavity that the inside wall covers the reflector surface, utilize the inside wall of heating cavity with laser multiple reflection formation temperature even heating space, and can promote the temperature in the heating space after the laser multiple reflection, promote the homogeneity degree and the heating intensity to the heating of plastic bottle embryo, can avoid the bottle embryo to split or appear the partly condition of whitening at subsequent blowing in-process of plastic bottle embryo, promote the quality of laser heating plastic bottle embryo.

Description

Plastic bottle embryo heating device

Technical Field

The invention relates to the technical manufacturing field of plastic bottle blanks, in particular to a plastic bottle blank heating device.

Background

PET (polyethylene terephthalate) plastic bottles are widely used in life, require heating for plasticization during their manufacture, and are then formed into standard plastic bottles by blow molding. The heating of the blank is one of the most core and key links in the whole manufacturing process, and directly influences the molding and quality of the plastic bottle. In the conventional PET plastic bottle heating technology, there are several methods:

the first is to heat the preform by radiation using a halogen lamp with broad spectrum infrared rays to reach the stretching temperature. When the method is used for heating, the halogen lamp tube is generally arranged beside and above the PET plastic bottle embryo. When the method is used for actual production, the infrared light directivity of the first method is poor, and the problems of uneven surface temperature, larger inner-outer temperature difference, unbalanced internal stress, low thermal efficiency and the like of the formed blank are easily caused.

And the second method adopts a microwave heating method, namely, electromagnetic wave heating is carried out on the embryo by utilizing a microwave generator, so that the embryo reaches the stretching temperature. The high penetrability of microwaves is used for realizing uniform temperature inside and outside the embryo and reasonable internal stress distribution, but the problems of complex equipment, high cost, complex design for preventing radiation leakage, difficulty in partition control and the like are solved.

The third is a water bath heating method, namely, the water bath is used for heating the parison to reach the stretching temperature, so that the uniform internal and external temperature of the parison, reasonable internal stress distribution, energy conservation, environmental protection and the like can be realized, but the water bath heating method has the problems of complex equipment, high cost, low efficiency, easiness in causing surface pollution of the parison and the like. In order to improve the effect and efficiency of the water bath heating method, the temperature, flow and pressure of the water bath are controlled, and the cleaning and drying of the blanks are also required to be treated.

In order to solve the problems, the prior art adopts a laser heating method to heat the PET plastic bottle embryo, but because the PET plastic has poor heat conduction performance, the uniformity of the temperature of the inner wall and the outer wall is difficult to ensure in the heating process of a short time, and the bottle embryo is easy to crack or partially whiten in the subsequent blow molding process, the method is only suitable for blow molding preheating of the thin-wall PET plastic bottle embryo, and the use field is greatly limited.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the PET plastic bottle blank heated by the laser heating method in the prior art is easy to crack or partially whiten in the subsequent blow molding process, so as to provide the plastic bottle blank heating device.

In order to solve the technical problems, the invention provides a plastic bottle embryo heating device, comprising:

the side wall of the inner cavity of the heating cavity is covered with a reflecting mirror surface;

the laser array is arranged on the side wall of the heating cavity, the light emitting direction of the laser array faces into the heating cavity, and an included angle between the light emitting direction of the laser array and the inner side wall of the heating cavity facing the light emitting direction of the laser array is an acute angle.

Optionally, the bottle embryo heating device further comprises a conveying assembly, wherein the heating cavity is provided with a bottle embryo inlet and a bottle embryo outlet, the conveying assembly extends from the bottle embryo inlet to the bottle embryo outlet, the conveying assembly is provided with a plurality of mounting stations, and the mounting stations are suitable for mounting plastic bottle embryos.

Optionally, the delivery assembly comprises:

a limit support rail is provided with a transmission chain in a sliding manner, a mounting tray is arranged on the transmission chain, and a mounting station is arranged on the mounting tray;

and the driving piece is in transmission fit with the conveying chain so as to drive the conveying chain to slide along the limit support rail.

Optionally, the mounting tray is in rotational engagement with the conveyor chain.

Optionally, auxiliary reflectors are arranged on the heating cavity at the bottle embryo inlet and the bottle embryo outlet, and the reflective surfaces of the auxiliary reflectors are obliquely arranged towards the inner cavity of the heating cavity.

Optionally, the reflecting surface of the auxiliary reflecting member is a curved surface.

Optionally, the laser arrays are disposed consecutively in at least one direction on the side walls of the heating cavity.

Optionally, the laser arrays are arranged on the side wall of the heating cavity at intervals, and the arrangement direction of the multiple groups of laser arrays is perpendicular to the extending direction of the laser arrays.

Optionally, laser arrays are installed on two opposite side walls of the heating cavity, and the laser arrays on the side walls of different heating cavities are respectively arranged at two ends of the heating cavity, which are far away from each other.

Optionally, the outgoing beam of the laser array is a square cone.

The technical scheme of the invention has the following advantages:

1. the invention provides a plastic bottle embryo heating device, which comprises: the side wall of the inner cavity of the heating cavity is covered with a reflecting mirror surface; the laser array is arranged on the side wall of the heating cavity, the light emitting direction of the laser array faces into the heating cavity, and an included angle between the light emitting direction of the laser array and the inner side wall of the heating cavity facing the light emitting direction of the laser array is an acute angle.

When the plastic bottle embryo heating device works, the laser array is started to emit laser into the heating cavity, the laser forms a heating space in the heating cavity after being reflected for multiple times by the reflecting mirror surface on the inner side wall of the heating cavity, and the laser is radiated for multiple times by the inner side wall of the heating cavity, so that the temperature in the heating cavity is kept uniform, and when the plastic bottle embryo enters the heating cavity, the plastic bottle embryo is heated by the heating space to complete the plasticizing process. Through with laser injection in the heating cavity that the inside wall covers the reflector surface, utilize the inside wall of heating cavity with laser multiple reflection formation temperature even heating space, and can promote the temperature in the heating space after the laser multiple reflection, promote the homogeneity degree and the heating intensity to the heating of plastic bottle embryo, can avoid the bottle embryo to split or appear the partly condition of whitening at subsequent blowing in-process of plastic bottle embryo, promote the quality of laser heating plastic bottle embryo.

2. The invention provides a plastic bottle embryo heating device, which further comprises a conveying assembly, wherein a bottle embryo inlet and a bottle embryo outlet are arranged on a heating cavity, the conveying assembly extends from the bottle embryo inlet to the bottle embryo outlet, a plurality of mounting stations are arranged on the conveying assembly, and the mounting stations are suitable for mounting plastic bottle embryos. The conveying assembly drives the plastic bottle blanks to enter and exit in the heating cavity, so that the automation of the plastic bottle blank heating process is realized.

3. According to the plastic bottle embryo heating device provided by the invention, the auxiliary reflecting piece is arranged on the heating cavity at the bottle embryo inlet and the bottle embryo outlet, and the reflecting surface of the auxiliary reflecting piece is obliquely arranged towards the inner cavity of the heating cavity. By arranging the auxiliary reflecting piece at the bottle embryo inlet and the bottle embryo outlet, the laser reflected to the bottle embryo inlet and the bottle embryo outlet is reflected back to the inside of the heating cavity, so that the laser overflowed out of the heating cavity is reduced, the heat loss is reduced, and the heating power is improved.

4. According to the plastic bottle blank heating device provided by the invention, the emergent light beam of the laser array is Fang Zhuixing, and the square conical laser beam is repeatedly reflected by the reflecting mirror surface, so that the laser can cover the space in the heating cavity, and the uniformity of the temperature in each part of the heating cavity is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a plastic bottle preform heating device according to an embodiment of the present invention.

Fig. 2 is a top view of a plastic bottle preform heating device provided in an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a laser array according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a heating chamber provided in an embodiment of the present invention.

Fig. 5 is a schematic structural view of a conveying assembly provided in an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a laser array and a heating cavity in cooperation with each other according to an embodiment of the present invention.

Fig. 7 is a top cross-sectional view of a laser array and heating chamber co-operating installation provided in an embodiment of the present invention.

Fig. 8 is a front cross-sectional view of a laser array provided in an embodiment of the invention mounted in cooperation with a heating cavity.

Fig. 9 is a schematic structural diagram of a laser array and a heating cavity according to another embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a laser array and a heating cavity according to another embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a laser array and a heating cavity according to another embodiment of the present invention.

Fig. 12 is a schematic structural view of a plastic bottle preform heating device according to another embodiment of the present invention.

Fig. 13 is a schematic structural view of a plastic bottle preform heating device according to another embodiment of the present invention.

Reference numerals illustrate: 1. a laser array; 2. a laser module; 3. a heating cavity; 4. a turntable; 5. a mounting tray; 6. a conveyor chain; 7. a feeding machine; 8. a limit support rail; 9. a bottle embryo body; 10. a rack; 11. and (5) assisting the chain.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Examples

Fig. 1 to 9 show a plastic bottle preform heating device provided in this embodiment, which includes a heating cavity 3, a laser array 1, a conveying assembly and a feeding assembly. The laser array 1 is composed of a plurality of laser modules 2, as shown in fig. 3, and generates laser and forms a cone-shaped light emitting area, and the number of the laser modules 2 can be adjusted according to actual needs.

The side wall of the inner cavity of the heating cavity 3 is covered with a reflecting mirror surface, and the light emergent region forms a heating space through multiple reflections of the heating cavity 3. As shown in fig. 4, the reflecting mirror surface in the heating cavity 3 comprises plane reflecting mirrors covered on the left and right side walls in the heating cavity 3, curved reflecting mirrors covered at the entrance of the bottle embryo and the exit of the bottle embryo, and bottom reflecting mirrors covered on the upper side, and all reflecting mirror surfaces are made of gold plating materials. The laser array 1 is installed on the lateral wall of heating cavity 3, and the light-emitting direction of laser array 1 is in the heating cavity 3 towards, and the contained angle between the light-emitting direction of laser array 1 and the inside wall of heating cavity 3 of orientation is the acute angle, promptly the light-emitting direction of laser array 1 is not perpendicular with between the inside wall of heating cavity 3 for the reflector surface on the inside wall of heating cavity 3 can be with laser multiple reflection. In this embodiment, as shown in fig. 7 and 8, the included angle in the horizontal direction is 22 °, and the included angle in the vertical direction is 16 °.

In order to realize automatic feeding and automatic discharging of bottle blanks in the heating cavity 3, a bottle blank inlet and a bottle blank outlet are arranged on the heating cavity 3, auxiliary reflecting pieces are arranged on the heating cavity 3 at the bottle blank inlet and the bottle blank outlet, and the reflecting surfaces of the auxiliary reflecting pieces are obliquely arranged towards the inner cavity of the heating cavity 3. In this embodiment, the reflection surface of the auxiliary reflection member is a curved surface. The conveying assembly extends from the bottle embryo inlet to the bottle embryo outlet, and is provided with a plurality of mounting stations which are suitable for mounting plastic bottle embryos. Specifically, as shown in fig. 5, the conveying assembly includes a stopper rail 8 and a driving motor as a driving member. The limit supporting rail 8 is provided with a conveying chain 6 in a sliding manner, the conveying chain 6 is provided with a mounting tray 5, and the mounting station is arranged on the mounting tray 5. The driving part is in transmission fit with the conveying chain 6 to drive the conveying chain 6 to slide along the limit supporting rail 8, and further, a rotary table 4 is arranged at the output end of the driving part, and the rotary table 4 is in meshed fit with the conveying chain 6 to drive the conveying chain 6 to move. The limit support rail 8 is used for supporting the conveying chain 6, the turntable 4 is used for driving the conveying chain 6 to advance along the working direction, the toothed rotating wheels are arranged at the outer edges of the mounting trays 5, the mounting trays 5 are placed on the conveying chain 6, and the mounting trays 5 are connected with the conveying chain 6 through bearing fit, so that the mounting trays 5 can rotate on the conveying chain 6. The toothed runner on the mounting tray 5 is meshed with the rack 10 at the mounting position of the heating cavity 3, and the rack 10 drives the mounting tray 5 to rotate so as to enable the PET plastic bottle blanks on the mounting station to rotate, so that the PET plastic bottle blanks are heated uniformly. The rotation speed and the advancing speed of the bottle embryo body 9 are respectively and independently controlled by the movement speed of the rack 10 and the movement speed of the conveying chain 6.

A loading machine 7 is installed upstream of the heating chamber 3, the loading machine 7 being used to place the PET plastic bottle blanks on the mounting station of the mounting tray 5. The heating parameters such as the heating temperature, the heating time and the like of the bottle embryo body 9 in the heating cavity 3 are adjusted by adjusting the working power of the laser array 1, the light emitting angle of the light emitting area and the rotating speed of the output end of the driving motor. A temperature sensor can be further installed in the heating cavity 3 and used for monitoring the temperature in the heating space in real time and controlling the working power of the laser array 1, the light emitting angle of the laser array 1, the rotating speed of the output end of the driving motor and other operation parameters according to the real-time temperature.

The laser arrays 1 are arranged continuously in the vertical direction on the side walls of the heating chamber 3. The laser arrays 1 are arranged on two opposite side walls of the heating cavity 3, and the laser arrays 1 positioned on the side walls of different heating cavities 3 are respectively arranged at two ends of the heating cavity 3, which are far away from each other. The outgoing beam of the laser array 1 is square cone.

The laser array 1 is a Horizontal Cavity Surface Emitting Laser (HCSEL) or a Vertical Cavity Surface Emitting Laser (VCSEL), can provide a laser source of square cone light with high power, high efficiency, low cost, narrow bandwidth, adjustability and small divergence angle, and can realize large-area uniform irradiation and accurate control of heat; the light emitting angle of the laser module 2 is regulated to form a certain included angle with the plane reflecting mirror, and the heating area is formed by matching with the repeated reflection of the reflecting mirror surface in the heating cavity 3, so that the PET plastic bottle blank can receive the reflected light for multiple times to carry out heat absorption, the total absorption rate is improved, and the heating efficiency is ensured; the HCSEL horizontal cavity surface emits, a small area can output high power, light with low absorptivity, such as 808nm wavelength, can realize higher total absorptivity through repeated reflection; VCSEL vertical cavity surface emission and large area light emission can be used for heating PET plastic bottle blanks by using light with relatively high absorptivity and wavelength of 1100 nm. In the process of conveying and conveying the bottle blanks, the heat dissipation on the surfaces of the bottle blanks can be supplemented by arranging the laser modules 2 at the positions of the tail ends close to the outlets; the heating cavity 3 can accommodate a plurality of PET plastic bottle blanks to be heated simultaneously, so that the heating time of a single bottle is shorter, and the production efficiency is further improved. The auxiliary reflecting piece is arranged at the edge of the heating cavity 3, the curved surface reflecting mirror group is adopted, the effective light return of the edge of the heating cavity 3 can be realized, and the whole cavity adopts a semi-closed configuration, so that heat dissipation can be effectively prevented.

The laser arrays 1 may be set as one group or multiple groups connected in series, and in this embodiment, the laser arrays 1 are provided with two groups, which are distributed on two sides of the heating cavity 3 in a staggered manner, so as to generate laser and form a light emitting area, so as to improve the uniformity of the laser light field distribution. The working wavelength of the laser module 2 is 800-2000nm.

In the embodiment, the preferable heating range of 90-120 ℃ is set, the bottle embryo adopts 38mm caliber PET normal temperature filling standard tube blank, and the height of the bottle embryo body 9 is 66mm. Experiments were performed using a HCSEL semiconductor custom laser light source module with an operating wavelength of 940 nm. The area of a single laser module 2 is 2 multiplied by 2mm, the light output power is 2W, the height of a bottle blank is covered by using 35 modules by the single laser array 1, two groups of laser arrays 1 are arranged and distributed on two sides of a heating cavity 3 in a staggered manner, as shown in fig. 9. The conveying speed of the bottle embryo body 9 is 10-20cm/s, and about 6-7 PET plastic bottle embryos can be simultaneously contained in a heating space formed in the heating cavity 3.

Compared with a halogen lamp oven for heating, the heating cavity 3 with the mirror surface component is matched with the laser array 1 to heat the plastic bottle blank, the production efficiency is improved by about one time, and compared with a thulium-doped fiber laser heating mode, the chip laser array 1 has obvious cost advantage and is more suitable for large-scale production and use. According to the intelligent autonomous regulation and control of actual production conditions, multi-scene heating is realized, and various functions of the product are comprehensively regulated.

When the plastic bottle embryo heating device works, firstly, a controller controls the laser array 1 to start, a light emitting area is formed, and a heating space is formed in the heating cavity 3; then the mechanical arm on the feeding machine 7 is used for grabbing the PET plastic bottle embryo body 9, the PET plastic bottle embryo body 9 is reversely buckled and placed on the installation station of the installation tray 5 after being overturned, the driving motor drives the rotary table 4 to rotate, and then the rotary table 4 drives the conveying chain 6 to drive the bottle embryo body 9 on the installation tray 5 to be sent into the heating space in the heating cavity 3, and the PET plastic bottle embryo body 9 is heated. The toothed rotating wheel at the outer edge of the mounting tray 5 is meshed with the rack 10 in the heating cavity 3, so that the mounting tray 5 rotates to drive the PET plastic bottle blank body 9 to rotate, and the bottle blank body 9 is heated uniformly; in the heating process, the controller monitors the ambient temperature in the heating space and the temperature of the plastic bottle embryo body 9 through a temperature sensor in the connected heating cavity 3, and adjusts the working power of the laser array 1, the light emitting angle of the light emitting area and the driving speed of the rotary table 4 so as to ensure the stability and consistency of the heating process of the plastic bottle embryo body 9; when the temperature sensor detects that the PET plastic bottle embryo reaches the set temperature range, the bottle embryo body 9 is transported out of the heating cavity 3 and enters the next production link.

The plastic bottle embryo heating device provided by the embodiment adopts the laser array 1 to emit laser and forms a heating space through the reflection mirror to reflect the laser for multiple times, and the PET plastic bottle embryo body 9 is heated through the heating space, so that the heating efficiency is higher, and the heating temperature is uniformly distributed in the heating space. The laser array 1 is used for heating, so that a square cone type light emitting laser source with high power, high efficiency, low cost, low brightness, narrow bandwidth and adjustability can be provided, PET plastic bottle blanks can be heated rapidly and uniformly, and the production efficiency is improved; the controller can adjust the working power of the laser array 1 and the driving speed of the rotary table 4 according to the temperature change of the PET plastic bottle embryo body 9 in the heating zone so as to ensure the stability and consistency of the heating process of the PET plastic bottle embryo body 9, thereby improving the product quality; the number of the laser arrays 1 can be adjusted according to the requirements of the size, the shape and the like of PET plastic bottle blanks, and the laser array has strong adaptability and flexibility; the conveying assembly can automatically load and rotate PET plastic bottle blanks, and convey the PET plastic bottle blanks to a heating area and a next production link, so that automatic production is realized, and manual operation and cost are reduced. Meanwhile, in the embodiment, the laser arrays 1 are arranged along the vertical direction, the laser is efficiently utilized by the reflection of the left and right reflecting mirrors on the left and right sides of the inside of the heating cavity, and the laser is vertically arranged, so that the laser energy of the part is very low and cannot damage the laser arrays even if the laser is reflected to the laser arrays, and the service life of the laser arrays can be prolonged.

As an alternative embodiment, in order to increase the laser heating power, the laser array 1 is provided with three groups at intervals in the horizontal direction on both the left and right side walls of the heating chamber 3, as shown in fig. 10 and 11. Specifically, a preferable heating range of 90-120 ℃ is set, a standard tube blank is filled at normal temperature by adopting PET with a caliber of 38mm, and the height of the bottle blank body 9 is 66mm. The VCSEL semiconductor customized laser light source module with the working wavelength of 1100nm is selected, the area of a single laser module 2 is 6 multiplied by 6mm, the light output power is 8W, the height of a bottle embryo is covered by the single laser array 1 through 12 laser modules 2, six groups of laser arrays 1 are arranged, and the six groups of laser arrays are distributed on two sides of a heating cavity 3 in a staggered mode. The conveying speed of the bottle embryo body 9 is 10-20cm/s, and about 7-8 PET plastic bottle embryos can be simultaneously contained in a heating space formed in the heating cavity 3.

As an alternative embodiment, as shown in fig. 12, a toothed runner at the outer edge of the mounting tray 5 in the heating cavity 3 is driven by an auxiliary chain 11, so that the mounting tray 5 rotates to drive the PET plastic bottle embryo body 9 to rotate, and the bottle embryo body 9 is heated uniformly.

As an alternative embodiment, as shown in fig. 13, a group of conveying components can work together with a plurality of groups of heating cavities 3, and by installing 12 groups of heating cavities 3 in parallel, the PET plastic bottle blanks are heated, so that the single-machine production beat is not lower than 6000bph, and the large-scale production of heating the PET plastic bottle blanks is realized.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A plastic bottle preform heating device, comprising:

a heating cavity (3), the side wall of the inner cavity of which is covered with a reflecting mirror surface;

the laser array (1) is installed on the lateral wall of the heating cavity (3), the light emergent direction of the laser array (1) faces into the heating cavity (3), and an included angle between the light emergent direction of the laser array (1) and the inner lateral wall of the heating cavity (3) facing the light emergent direction is an acute angle.

2. The plastic bottle embryo heating device of claim 1, further comprising a conveyor assembly, wherein the heating cavity (3) is provided with a bottle embryo inlet and a bottle embryo outlet, the conveyor assembly extends from the bottle embryo inlet to the bottle embryo outlet, and wherein the conveyor assembly is provided with a plurality of mounting stations, the mounting stations being adapted for mounting plastic bottle embryos.

3. The plastic bottle embryo heating device of claim 2, wherein the delivery assembly comprises:

the limit support rail (8) is provided with a conveying chain (6) in a sliding manner, the conveying chain (6) is provided with a mounting tray (5), and the mounting station is arranged on the mounting tray (5);

and the driving piece is in transmission fit with the conveying chain (6) so as to drive the conveying chain (6) to slide along the limit support rail (8).

4. A plastic bottle preform heating device according to claim 3, characterized in that the mounting tray (5) is in a running fit with the conveyor chain (6).

5. Plastic bottle-blank heating device according to any of claims 1-4, characterized in that auxiliary reflectors are mounted on the heating cavity (3) at the bottle-blank inlet and the bottle-blank outlet, the reflective surfaces of the auxiliary reflectors being arranged obliquely towards the inner cavity of the heating cavity (3).

6. The plastic bottle embryo heating device of claim 5 wherein the reflective surface of the auxiliary reflector is curved.

7. A plastic bottle embryo heating device as claimed in any of claims 1-4, characterized in that said laser array (1) is arranged continuously in at least one direction on the side wall of said heating cavity (3).

8. The plastic bottle embryo heating device according to claim 7, wherein a plurality of groups of laser arrays (1) are arranged on the side wall of the heating cavity (3) at intervals, and the arrangement direction of the plurality of groups of laser arrays (1) is perpendicular to the extension direction of the laser arrays (1).

9. The plastic bottle embryo heating device according to any of claims 1 to 4, wherein the laser arrays (1) are mounted on two opposite side walls of the heating cavity (3), and the laser arrays (1) on different side walls of the heating cavity (3) are respectively disposed at two ends of the heating cavity (3) which are far away from each other.

10. The plastic bottle embryo heating device as claimed in any of claims 1-4, wherein the outgoing beam of the laser array (1) is a square cone.