Laser modeling design method and device for plastic bottle

Abstract

The invention discloses a laser modeling design method and device for plastic bottles, the plastic bottles are fed in a circular motion mode and rotate automatically at the same time, when the plastic bottles move into the scanning range of a reflection rotating mirror, laser emission and reflection rotating mirror movement are controlled synchronously, the emitted laser is emitted to the reflection rotating mirror after laser beam shrinking, and the plastic bottles are subjected to laser beam shrinking; reciprocating scanning linear light spots are formed through movement of the reflection rotating mirror and act on the outline of the plastic bottle, and laser modeling design of the specific position of the plastic bottle is completed in cooperation with self-rotation of the plastic bottle. According to the invention, the rotating mirror and the laser are synchronously controlled, and the adjustable laser beam shrinking system is combined, so that lines, contours and patterns required by related products can be added on the formed plastic bottle in a short-time heating process.

Description

Technical Field

[0001] The invention relates to a laser modeling design method and device for a plastic bottle. Background Art

[0002] At present, plastic bottles (mainly PET, and other PP, PC, etc.) are widely used in the beverage industry in life. The manufacturing process of beverage bottles is to use the initial bottle embryo to heat and soften it, and then send it into the mold. The mold surface is engraved with the required stripes and pattern contours, and then blow-molded to form a standard beverage bottle with specific specifications and surface patterns.

[0003] The unique surface stripes and patterns of the plastic bottle outline represent the company's brand image. Therefore, the pattern shape and specifications of the beverage bottle surface are the most core and key link in the entire plastic bottle manufacturing, and are also the direct basis for judging the product quality.

[0004] The traditional plastic bottle modeling design technology adopts a specific customized bottle blowing mold cavity blow molding. This method uses specific lines and contour patterns designed on the inner wall of the mold to design the plastic bottle shape, and then the high temperature and high pressure air in the mold cavity instantly stretches the bottle embryo into the shape of the plastic bottle in the mold cavity, thereby obtaining the required contour shape of the plastic bottle.

[0005] However, the current design method of the contour shape of plastic bottles using mold molding cannot achieve the modeling of fonts and line contours that need to be less than 2mm. The design method of mold molding cannot present such fine line contours on plastic bottles. At the same time, when it is necessary to add relevant lines, contours and patterns to the plastic bottles for a second time, the modeling design scheme of mold molding cannot meet the requirements. Summary of the invention

[0006] The purpose of the present invention is to provide a laser modeling design method and device for plastic bottles in view of the problems existing in the prior art. Through the synchronous control of the rotating mirror and the laser, combined with an adjustable laser beam reduction system, the lines, contours and patterns required by related products (less than 2 mm) can be added to the formed plastic bottles during a short heating process.

[0007] According to one aspect of the invention specification, a laser modeling design method for a plastic bottle is provided, wherein the plastic bottle is loaded in a circular motion and simultaneously rotates, and when the plastic bottle moves into the scanning range of a reflective rotating mirror, the laser emission and the movement of the reflective rotating mirror are synchronously controlled, the emitted laser is incident on the reflective rotating mirror after laser beam reduction, and a reciprocating scanning line spot is formed through the movement of the reflective rotating mirror to act on the outer contour of the plastic bottle, and the laser modeling design of a specific position of the plastic bottle is completed in coordination with the self-rotation of the plastic bottle.

[0008] As a further technical solution, the optimal laser wavelength is determined according to the material of the plastic bottle, including: For plastic bottles of different materials, spectrum analysis at different temperatures is performed to obtain the laser wavelength corresponding to the optimal spectrum absorption rate of plastic bottles of different materials, and form a correspondence table between plastic bottle material and optimal wavelength; According to the material of the plastic bottle to be processed, in combination with the plastic bottle material-optimal wavelength correspondence table, the corresponding optimal laser wavelength is selected.

[0009] As a further technical solution, the laser beam reduction includes: Constructing a laser beam reduction system, including two lenses and structural fixtures with adjustable spacing; According to the required spot diameter, the distance between the two lenses is adjusted to form a circular spot with different reduction factors.

[0010] As a further technical solution, the method further includes: The self-rotation speed of the plastic bottle is adjusted so that the plastic bottle can complete the laser modeling design of the circumference or preset angle when passing through the scanning range of the reflective rotating mirror.

[0011] As a further technical solution, the method further includes: By adjusting the speed of the reflective mirror, the density of the line light spot acting on different positions of the plastic bottle's outline can be different, completing the laser modeling design of different patterns.

[0012] As a further technical solution, the method further includes: Adjust the installation method of the reflective mirror and / or the plastic bottle feeding assembly to complete the laser modeling design of different positions and different combination lines.

[0013] As a further technical solution, the method further includes: According to the design requirements of the plastic bottle, select a laser to cooperate with laser shrinkage and reflective mirrors to complete the heating and shrinkage of a certain position, or select multiple lasers to configure laser shrinkage and reflective mirrors to complete the simultaneous heating and shrinkage of multiple positions.

[0014] According to one aspect of the invention specification, there is provided a laser modeling design device for a plastic bottle, comprising a laser, a laser beam reduction system and a reflective rotating mirror, wherein the laser is used to emit laser light according to a determined optimal laser wavelength, the laser beam reduction system is used to change the diameter of the light spot after the laser is incident into a circular light spot of a desired diameter, and the reflective rotating mirror is used to form a reciprocating scanning line light spot by rotating to act on the outer contour of the plastic bottle, so as to cooperate with the self-rotation of the plastic bottle and complete the laser modeling design of a specific position of the plastic bottle.

[0015] As a further technical solution, the reflective rotating mirror includes a multi-faceted prism and a driving mechanism for driving the multi-faceted prism to rotate, and each surface of the prism is coated with a reflective film of a specific wavelength band.

[0016] As a further technical solution, the feeding assembly of the plastic bottle is a rotary motion mechanism, and the installation methods of the feeding assembly and the reflective rotating mirror are adjustable.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention heats and shrinks the plastic bottle by using a rotating mirror. By controlling the speed of the rotating mirror and the rotation speed of the plastic bottle, the depth and heating temperature of the heating and shrinkage at different positions on the annular contour of the plastic bottle can be accurately controlled. Aiming at the outer contour of the plastic bottle, the present invention can adopt a combination of a laser beam reduction system and a reflective rotating mirror to obtain a finer line spot, so that the outer contour of the plastic bottle obtains finer lines and shape contours (1mm). Taking into account the actual production efficiency, multiple devices can be combined to cover the entire outer contour of the plastic bottle, thereby realizing the re-addition of lines, shapes and patterns to the entire outer contour.

[0018] The present invention uses a laser with a preferred special wavelength to irradiate the plastic bottle to achieve the heating and shrinking function of a partial area, so that the relevant line contour design and processing can be performed on the plastic bottle, and the economic benefit of the secondary design of the plastic bottle contour modeling can be achieved.

[0019] The present invention can also be equipped with a temperature detector to detect the product temperature in real time, so as to achieve the purpose of accurate temperature control and real-time feedback of the plastic bottle contour. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the heating principle of the reflective rotating mirror provided in an embodiment of the present invention.

[0021] Figure 2 A schematic diagram of the heat absorption state curve of a PET plastic bottle provided in an embodiment of the present invention.

[0022] Figure 3 A schematic diagram of the principle of a laser beam reduction system provided in an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the heating optical path of the reflective rotating mirror provided in an embodiment of the present invention.

[0024] Figure 5 A schematic diagram of a laser shaping design device for a plastic bottle provided in an embodiment of the present invention.

[0025] Figure 6 A schematic diagram of the effect after laser shaping provided by an embodiment of the present invention.

[0026] In the figure: 1. Laser; 2. Laser beam reduction system; 3. Reflective rotating mirror; 4. Reciprocating scanning line spot (laser heating area); 5. Plastic bottle; 6. Loading assembly; 7. Optical stand base; 10. Incident light; 20. Outgoing light. DETAILED DESCRIPTION

[0027] In view of the current situation that existing methods cannot realize the modeling design of small sizes and cannot realize the secondary addition of contours, the present invention provides a laser modeling design method for plastic bottles. The movement mode of a reflective rotating mirror is adopted, combined with a laser beam reduction system, to design relevant lines, fonts and contours of the existing appearance of the plastic bottle, and can meet the modeling requirements of small sizes, solve the shortcomings of mold molding that cannot be formed in small sizes, and solve the problem of secondary addition of contours to the appearance of the plastic bottle.

[0028] The method provided by the present invention synchronously controls the reflective mirror and the laser through a control card, and adopts an adjustable laser beam reduction system to obtain the required line length and contour spot size, so as to realize the addition of lines and patterns on small-sized plastic bottles.

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] An embodiment of the present invention provides a laser modeling design method for a plastic bottle. The plastic bottle is loaded in a circular motion and rotates at the same time. When the plastic bottle moves into the scanning range of a reflective rotating mirror, laser emission and the movement of the reflective rotating mirror are synchronously controlled. The emitted laser is incident on the reflective rotating mirror after laser beam reduction. A reciprocating scanning line spot is formed through the movement of the reflective rotating mirror to act on the outer contour of the plastic bottle. In conjunction with the self-rotation of the plastic bottle, the laser modeling design of a specific position of the plastic bottle is completed.

[0031] like Figure 1 The figure shows the principle diagram of heating a plastic bottle by a reflective rotating mirror. The laser emitted by the laser is incident on the reflective surface of the rotating mirror after optical beam reduction. The movement of the rotating mirror forms a reciprocating scanning line spot that acts on the bottle body.

[0032] In the embodiment of the present invention, Figure 2As shown, taking polyethylene terephthalate PET and polypropylene PP plastic bottles as examples, firstly, spectral absorption analysis is performed on them to obtain the laser wavelength corresponding to the optimal spectral absorption rate of the plastic bottle of this material, and a corresponding table of plastic bottle material-optimal wavelength is formed, as shown in Table 1; then, in actual processing, the required laser wavelength is selected according to the material of the plastic bottle to be processed. The embodiment of the present invention first analyzes the spectral absorption rate of plastic bottles in different bands to obtain the optimal spectral absorption rate of different materials, and then makes further selection in the wavelength of the laser to achieve the best configuration achievable by current technology.

[0033] Table 1 Absorption rate of spectra corresponding to different bands under different materials

[0034] In practical applications, combined with the existing wavelength lasers on the market, a continuous laser with a wavelength of 1500-12000nm can be preferred. Specifically, the continuous laser used in the embodiment of the present invention can be configured to have a wavelength range of: 1500-12000nm infrared, and a power of 50-600W.

[0035] The reflective rotating mirror involved in the embodiment of the present invention refers to a rotating reflective structure with multi-faceted prisms, and multiple prisms rotate synchronously. The specific number of prisms can be customized according to actual needs.

[0036] The number of faces of the prism is related to the scanning range of the line spot. Taking an 18-faceted prism as an example, 360÷18=20°, the reflection angle range after the laser is incident is 40°, that is, the scanning range of the line spot is 0°-40°. If a 10-faceted prism is taken as an example, its reflection angle range is 72°, that is, the scanning range of the line spot is 0°-72°. It should be noted that the laser scanning angle, the distance between the reflective mirror and the plastic bottle, and the length of the laser reciprocating scanning light involve a tangent trigonometric function relationship. The number of prisms of the reflective mirror determines the angle of the line spot scanning, and the distance between the reflective mirror and the plastic bottle determines the length of the line spot scanning.

[0037] Optionally, the number of faces of the prism is also related to the speed of the plastic bottle's self-rotation. Under the condition that the laser power remains unchanged, the heating temperature of the plastic bottle is ensured to remain unchanged. The more faces of the prism, the more light is irradiated to the bottle body, and the faster the plastic bottle's self-rotation speed is.

[0038] Furthermore, in order to meet the contours that cannot be manufactured on the current mold, the threshold of the line spot can be 0.5mm to 2mm, and the actual spot size of the laser can be 6mm to 7mm.

[0039] The laser beam reduction system involved in the embodiment of the present invention is composed of a group of plano-convex, plano-concave lenses, aspheric lenses and structural fixings with adjustable spacing. By adjusting the installation distance between the two lenses, the reduction factor of the spot diameter is changed, so that the spot diameter after the laser is incident is reduced to the target diameter, such as less than or equal to 2mm. Figure 3 As shown, after the incident light passes through the laser beam reduction system, the spot diameter of the outgoing light is reduced to the target diameter.

[0040] It should be noted that the adjustable spacing structural fixing member is used to fix the lens and adjust the distance between the lenses. The specific structure can be implemented by using the existing technology, and the present invention will not be described in detail here.

[0041] The method involved in the embodiment of the present invention further includes: adjusting the self-rotation speed of the plastic bottle so that the plastic bottle completes the laser modeling design of the circumference or the preset angle when passing through the scanning range of the reflective rotating mirror.

[0042] Specifically, the plastic bottle is loaded through a rotary motion mechanism, and the plastic bottle rotates while making a circular motion. When the plastic bottle moves to the scanning range of the reflective rotating mirror, the laser emitted by the laser is incident on the reflective surface of the rotating mirror after optical beam reduction, and the laser heating area formed by the movement of the rotating mirror acts on the bottle body. The self-rotation speed of the plastic bottle is determined according to the range of laser modeling design required for the plastic bottle. If the plastic bottle needs to complete circular laser modeling, the self-rotation speed of the plastic bottle can be designed to meet: from entering the laser heating area to leaving the laser heating area, it just completes one rotation; if the plastic bottle needs to complete laser modeling within a preset angle (such as 30°), the self-rotation speed of the plastic bottle can be designed to meet: from entering the laser heating area to leaving the laser heating area, it just completes a 30° rotation.

[0043] By adjusting the self-rotation speed of the plastic bottle, laser modeling design of a full circle, a half circle or a certain angle range can be achieved to meet different modeling requirements.

[0044] The method involved in the embodiment of the present invention further includes: adjusting the speed of the reflective rotating mirror so that the density of the line light spot acting on different positions of the plastic bottle's outer contour is different, thereby completing the laser modeling design of different patterns.

[0045] Specifically, when the laser power remains unchanged, the faster the speed of the reflective mirror, the denser the light irradiating the bottle body, and the deeper the groove formed. Therefore, for different patterns with different line depth requirements, the speed of the reflective mirror can be controlled to achieve processing of different depths and widths.

[0046] The method involved in the embodiment of the present invention further includes: adjusting the installation method of the reflective rotating mirror and / or the plastic bottle feeding assembly to complete the laser modeling design of different positions and different combination lines.

[0047] Optionally, when the reflective mirror and the feeding assembly are both installed horizontally, a groove line with supporting strength can be added at the neck position of the plastic bottle.

[0048] Optionally, when the reflective rotating mirror is installed horizontally and the feeding assembly is installed vertically, a vertical line profile can be formed from the mouth to the bottom of the plastic bottle.

[0049] Optionally, when the reflective rotating mirror is installed at an angle of 45°, thread lines and combined lines can be obtained to improve the overall support strength of the entire plastic bottle.

[0050] The reflective rotating mirror of the present invention can reciprocate left and right, up and down, or at a certain angle when performing reciprocating scanning, which is specifically determined according to the installation method or actual needs.

[0051] The method involved in the embodiment of the present invention also includes: according to the shape design requirements of the plastic bottle, selecting a laser to cooperate with laser shrinkage and a reflective rotating mirror to complete the heating and shrinkage of a certain position, or selecting multiple lasers to respectively configure laser shrinkage and reflective rotating mirrors to complete simultaneous heating and shrinkage of multiple positions.

[0052] Each set of laser modeling design equipment can be controlled independently. When multiple sets of equipment are working at the same time, each device can act on different modeling areas separately or on the same modeling area to complete complex contour modeling design.

[0053] The method involved in the embodiment of the present invention also includes: configuring a temperature detector to detect the product temperature in real time, and adjusting the laser power according to the real-time product temperature, so as to achieve the purpose of accurate temperature control and real-time feedback of the plastic bottle contour.

[0054] As a preferred embodiment, the embodiment of the present invention is described by taking a rotary plastic bottle appearance design production line with a heating temperature range of 90°C-110°C, a rotation diameter of 960mm, and 30 plastic bottles evenly distributed on the circumference as an example.

[0055] like Figure 4 As shown, a 50w-600w power, 1500nm-12000nm wavelength continuous laser is used, and a customized laser beam reduction system with a clear aperture of 25mm is used, so that the diameter of the incident light spot is 3mm (adjustable to be less than 3mm), and a special surface shape and number of rotating mirrors are customized. The parameters related to the customized rotating mirror meet the following parameter requirements: the laser angle after reflection from the rotating mirror is 40°, the irradiated light spot working distance is 707mm, and the length of the spot scan is 515mm. At the same time, a motion control card is used to control the laser and the rotating mirror at the same time. The control card can control the rotating mirror speed and the laser power.

[0056] Plastic bottles are running on the production line, which makes a circular motion around the central axis with a diameter of 960mm, and there are 30 stations distributed at intervals of 20°, of which 30 plastic bottles are distributed on 30 stations, and the turnover time of the production line can be set. The station where plastic bottles are installed on the production line has a self-rotation function, and the rotation speed can be adjusted. During the installation process, the distance from the rotating mirror to the station of the production line is 707mm, of which 6 stations on the production line are covered within the scanning length of the special mirror. When the production line rotates, the plastic bottles are heated by the laser on the bottle body and shrunk into lines and contours of various shapes, meeting the requirements of secondary plastic bottle modeling design.

[0057] Figure 5 The figure shows a laser shaping design device for a plastic bottle provided by an embodiment of the present invention, comprising a continuous laser with a specific wavelength range, an optical bench base, a laser beam reduction system, a reflective mirror and a plastic bottle feeding assembly. The continuous laser is fixed to the entire optical bench base, and the center point of the emitted laser is 65 mm away from the base, and the generated laser passes through the laser beam reduction system.

[0058] The laser beam reduction system is composed of a group of plano-convex, plano-concave lenses, aspheric lenses and structural fixings with adjustable spacing. By adjusting the installation distance between the two lenses, the reduction factor of the spot diameter is changed, so that the spot diameter after the laser is incident becomes a circular spot with a diameter of ≤3mm. The laser beam reduction system is installed at the light outlet of the laser through the middle connection panel and fixed to the laser to form an integral body.

[0059] The laser beam through the beam reduction system is radiated on the contour of the plastic bottle through the reflective mirror, which is installed on the motor shaft. The motor drives the reflective mirror to rotate. The reflective mirror is an 18-faceted prism, and each face is coated with a reflective film of a specific wavelength band. In the process of rotation, the laser beam is incident from the left edge of a prism surface to the right edge of the same prism surface at a reflection angle of 40°. After passing through the reflective mirror, the laser beam from the laser beam reduction system forms a line spot that scans back and forth within a reflection angle of 0°-40°, forming a laser heating area.

[0060] The feeding assembly of plastic bottles is a rotating motion mechanism driven by a sprocket, and 30 plastic bottle installation stations are evenly distributed on a circumference with a diameter of 960mm. The stations rotate while performing circular motion, and the rotation speed is about 1 circle per second. The distance from the feeding assembly to the rotating mirror is 707mm, so that the line spot scanning back and forth covers the plastic bottles of 6 stations, completes the heating of the outer contours of the 6 plastic bottles, and forms a shrinking inner ring contour.

[0061] Fix the plastic bottle on the self-rotating fixture and adjust its rotation speed to about 1 circle per second. When the plastic bottle moves into the scanning line segment of the rotating mirror, the rotating mirror moves, and the light scans back and forth to heat the plastic bottle. Because the plastic bottle rotates, the circumferential heating of the plastic bottle or the heating within a preset angle range can be achieved (achieved by adjusting the self-rotation speed). After heating to 90℃-110℃, the bottle embryo moves from the original station to the sixth station and leaves the heating area. It cools down for a certain period of time to form a contracted inner ring contour, completing the surface design of the plastic bottle. The laser modeling effect is as follows: Figure 6 shown.

[0062] In summary, the present invention has the following advantages: 1. The present invention uses 1500-12000nm infrared wavelength laser to heat the transparent bottle embryo. The preferred light source is between 1550 and 2500nm wavelength. Colored plastic bottles can use a laser light source with a wavelength of 1700-2000nm.

[0063] 2. The present invention adopts a rotating mirror and a shrinking optical system to achieve local heating and shrinking of the plastic bottle by a fine line light spot to form fine grooves, lines and related pattern contours.

[0064] 3. The present invention can provide a new method for redesigning the shape of a plastic bottle formed after bottle blowing, thereby obtaining an annular groove on the surface to facilitate the packaging film on the beverage bottle to be attached to the bottle body after heat shrinkage, without falling off during sliding, so that the packaging film can be better attached to the beverage bottle.

[0065] 4. The present invention can use a control card in conjunction with a rotating mirror motor and a laser to achieve precise control of the depth and width of the grooves that are heated and shrunk. The rotating mirror and the bottom plate can be installed horizontally, and the feeding assembly can be installed horizontally to add a groove line with supporting strength at the neck of the plastic bottle. The feeding assembly can be installed vertically to obtain a vertical line profile from the mouth to the bottom of the plastic bottle. The rotating mirror can be installed at a 45° angle to obtain thread lines and combined lines, thereby improving the overall supporting strength of the entire plastic bottle.

[0066] 5. The present invention can use a single machine to heat the plastic bottle to achieve heating and shrinkage at a certain location, or multiple machines can be combined to meet the needs of heating and shrinking at multiple locations of the bottle body to achieve a more complex contour design.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser modeling design method for a plastic bottle, characterized in that: The plastic bottles are loaded in a circular motion and rotate at the same time. When the plastic bottles move into the scanning range of the reflective mirror, the laser emission and the movement of the reflective mirror are synchronously controlled. The emitted laser is incident on the reflective mirror after laser beam reduction. The movement of the reflective mirror forms a reciprocating scanning line spot that acts on the outer contour of the plastic bottle. Combined with the self-rotation of the plastic bottle, the laser modeling design at a specific position of the plastic bottle is completed.

2. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The method further comprises: For plastic bottles of different materials, spectrum analysis at different temperatures is performed to obtain the laser wavelength corresponding to the optimal spectrum absorption rate of plastic bottles of different materials, and form a correspondence table between plastic bottle material and optimal wavelength; According to the material of the plastic bottle to be processed, in combination with the plastic bottle material-optimal wavelength correspondence table, the corresponding optimal laser wavelength is selected.

3. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The laser beam reduction comprises: Constructing a laser beam reduction system, including two lenses and structural fixtures with adjustable spacing; According to the required spot diameter, the distance between the two lenses is adjusted to form a circular spot with different reduction factors.

4. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The method further comprises: The self-rotation speed of the plastic bottle is adjusted so that the plastic bottle can complete the laser modeling design of the circumference or preset angle when passing through the scanning range of the reflective rotating mirror.

5. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The method further comprises: By adjusting the speed of the reflective mirror, the density of the line light spot acting on different positions of the plastic bottle's outline can be different, completing the laser modeling design of different patterns.

6. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The method further comprises: Adjust the installation method of the reflective mirror and / or the plastic bottle feeding assembly to complete the laser modeling design of different positions and different combination lines.

7. The laser shaping design method for a plastic bottle according to claim 1, characterized in that: The method further comprises: According to the design requirements of the plastic bottle, select a laser to cooperate with laser shrinkage and reflective mirrors to complete the heating and shrinkage of a certain position, or select multiple lasers to configure laser shrinkage and reflective mirrors to complete the simultaneous heating and shrinkage of multiple positions.

8. A laser shaping design device for plastic bottles, characterized in that: The invention comprises a laser, a laser beam reduction system and a reflective rotating mirror. The laser is used to emit laser according to a determined optimal laser wavelength. The laser beam reduction system is used to change the diameter of the light spot after the laser is incident into a circular light spot of a required diameter. The reflective rotating mirror is used to form a reciprocating scanning line light spot by rotating to act on the outer contour of the plastic bottle, so as to cooperate with the self-rotation of the plastic bottle and complete the laser modeling design of a specific position of the plastic bottle.

9. The laser shaping design device for plastic bottles according to claim 8, characterized in that: The reflective rotating mirror comprises a multi-faceted prism and a driving mechanism for driving the multi-faceted prism to rotate, and a surface of each prism is coated with a reflective film of a specific wavelength band.

10. The laser shaping design device for plastic bottles according to claim 8, characterized in that: The feeding assembly of the plastic bottle is a rotary motion mechanism, and the installation modes of the feeding assembly and the reflective rotating mirror are both adjustable.

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