Lightweight blow molding device for beer bottles

Abstract

The application provides a beer bottle lightweight blow molding device, the application controls the cabinet to coordinate the work of each component, the heating rod of the preheating part is inserted into the blank to heat and cooperate with the outer coating spraying of the spraying machine, the uneven heating problem caused by the thick bottle neck and the thin bottle body of the blank is solved, the performance risk is not needed to be compensated by relying on the additional thickening of the bottle body wall thickness, the weight of the lightweight bottle can be further reduced from the existing 30-35g; the overall heating of the infrared heating plate of the heating assembly, the real-time feedback of the detection probe, the directional supplementary heating of the fifth push rod driving annular heating rod further ensure the uniformity of the blank temperature, avoid the forming defects and strength fluctuations caused by uneven heating; the first push rod is fixed in height after the first adjustment, the second push rod drives the nozzle to direct the internal cooling mode of the clean compressed air to the bottle opening, the heat in the bottle is quickly discharged, the difference between the internal and external cooling rates of the finished product is reduced, and the residual stress is reduced.

Description

Technical Field

[0001] This application relates to the field of food plastic packaging technology, and in particular to a lightweight blow molding apparatus for beer bottles. Background Technology

[0002] Beer bottles are commonly used containers in the food packaging industry. Their molding process mainly relies on blow molding technology. Lightweighting is the core development direction of the industry. On the one hand, it can reduce the consumption of raw materials such as PET to reduce production costs and carbon emissions. On the other hand, it can improve transportation efficiency and meet the policy requirements of green packaging.

[0003] The existing problems are as follows: The beer bottle production process requires heating the preform. In the current technology, the preform is heated only by external heating. Due to the thick neck and thin body of the preform, uneven heating is easy to occur. In order to avoid molding defects and strength fluctuations caused by uneven heating, the industry has to adopt a conservative design, which compensates for the performance risks caused by uneven heating by increasing the thickness of the bottle wall and increasing the amount of material. As a result, the weight of existing lightweight bottles is mostly 30-35g.

[0004] In addition, the cooling stage of the finished product relies solely on external cooling, making it difficult to dissipate heat from inside the bottle. The large difference in cooling rates between the inside and outside can easily generate residual stress. Lightweight bottles are more prone to cracking due to their thin walls, so it is necessary to further retain wall thickness to mitigate the risk. Summary of the Invention

[0005] The purpose of this invention is to provide a lightweight blow molding apparatus for beer bottles in order to solve the above-mentioned problems.

[0006] The technical solution of this application is implemented as follows:

[0007] This application provides a lightweight blow molding device for beer bottles, including a housing, a spray preheating component, a heating component and a cooling component. A control cabinet is fixedly installed on the outside of the housing, and a conveyor belt is drivenly connected to the housing. Multiple sets of rotating blank seats are fixedly arranged on the outside of the conveyor belt, and a flipping unloading platform is correspondingly provided at the tail end of the conveyor belt.

[0008] All three are electrically connected to the control cabinet. The spray preheating component and the heating component are arranged sequentially along the conveyor belt conveying direction, and the cooling component is correspondingly arranged at the flipping and unloading end of the flipping unloading platform.

[0009] The spray preheating assembly includes a protective section, a sprayer, and a preheating section, all of which are electrically connected to the control cabinet. The protective section and the sprayer are arranged opposite each other along the width of the conveyor belt, and their center lines are perpendicular and coplanar with the conveying direction of the conveyor belt. The preheating section is located between the protective section and the sprayer. The bottom of the housing has a through-hole corresponding to the installation position of the preheating section. The top of the installation hole is perpendicular to the reserved hole of the rotating blank holder. The top of the preheating section can extend into the blank through the installation hole and the reserved hole of the rotating blank holder.

[0010] The heating assembly includes a heating box, a detection box, and a reheating box, all of which are electrically connected to the control cabinet. The three are sequentially spliced ​​along the conveying direction of the conveyor belt and fixedly installed on the front end of the blow molding mold inlet. They are also mounted on the top of the machine housing and span the surface of the conveyor belt. The inner cavities of the heating box, the detection box, and the reheating box correspond vertically to the surface of the conveyor belt.

[0011] The cooling assembly includes a first push rod, which is disposed at the flipping and unloading end of the flipping unloading platform. A connecting block is fixedly installed on the top of the first push rod, and an mounting plate is fixedly installed on the top of the connecting block. A second push rod is fixedly installed on any side of the mounting plate. A clamping rod is fixedly installed on the output end of the second push rod. Spray nozzles are symmetrically embedded on the left and right sides of the clamping rod, and the spray nozzles are connected to an external air source.

[0012] The first push rod, the second push rod, and the air source are all electrically connected to the control cabinet.

[0013] In one embodiment, the protective part includes a base, which is disposed opposite to the sprayer along the width direction of the conveyor belt, and the base is located on the side of the conveyor belt away from the sprayer. A mounting platform is fixedly installed on the top of the base, and a third push rod is fixedly installed on the top of the mounting platform. A docking block is fixedly installed on the output end of the third push rod, and a protective plate is fixedly installed on the output end of the third push rod through the docking block. The third push rod is electrically connected to the control cabinet.

[0014] In one embodiment, the preheating unit includes a protective shell disposed between the base and the spraying machine. A fourth push rod is fixedly installed inside the protective shell, and a first heat insulation plate is fixedly installed at the top of the protective shell. The output end of the fourth push rod passes through the protective shell and the first heat insulation plate in sequence and is fixedly installed with a connector. A second heat insulation plate is fixedly installed at the top of the connector. An I-shaped plate is fixedly installed at the top of the second heat insulation plate, and heating rods are symmetrically installed on the left and right sides of the top of the I-shaped plate.

[0015] The top of the heating rod can extend into the interior of the billet through the mounting hole and the reserved hole of the rotating billet base, and the axis of the heating rod is collinear with the axis of the rotating billet base.

[0016] The fourth push rod and the heating rod are electrically connected to the control cabinet.

[0017] In one embodiment, the number of mounting holes corresponds one-to-one with the number of heating rods, and the inner diameter of the mounting hole is larger than the outer diameter of the heating rod.

[0018] In one embodiment, the heating box includes a heating shell, and infrared heating plates are symmetrically arranged on the inner walls of the left and right sides of the heating shell;

[0019] The testing box includes a testing shell, and a testing probe is provided through the inner wall of any side of the testing shell, with the testing end of the testing probe facing the belt surface of the conveyor belt;

[0020] The heat exchange box includes a heat exchange outer shell, and a heat exchange structure is fixedly installed on the top of the heat exchange outer shell. One end of the heat exchange structure extends through the top of the heat exchange outer shell into its interior.

[0021] The heating shell, detection shell, and reheating shell are sequentially spliced ​​along the conveyor belt conveying direction and fixedly installed on the front end of the blow molding die inlet. They are also mounted on the top of the machine housing and span the conveyor belt surface. The inner cavities of the heating shell, detection shell, and reheating shell correspond vertically to the conveyor belt surface.

[0022] The infrared heating plate, detection probe, and heat replenishment structure are all electrically connected to the control cabinet.

[0023] In one embodiment, the heat-replenishing structure includes a fifth push rod, which is fixedly installed on the top of the heat-replenishing shell. The output end of the fifth push rod passes through the top of the heat-replenishing shell and is fixedly installed with an installation head inside it. A docking plate is fixedly connected to the bottom of the installation head. A partition is fixedly installed on the side of the docking plate near the conveyor belt surface. An annular heating rod is fixedly installed on the side of the partition near the conveyor belt surface, and the axis of the annular heating rod is collinear with the axis of the rotating blank.

[0024] The fifth push rod and the annular heating rod are both electrically connected to the control cabinet.

[0025] In one embodiment, the partition is made of a heat-insulating material.

[0026] The advantages or beneficial effects of the above technical solutions include at least the following:

[0027] This application discloses a lightweight blow molding device for beer bottles. Through the control cabinet, the various components work together in a coordinated manner. The heating rod of the preheating unit extends into the blank for heating, and the outer coating is sprayed by the spraying machine. This solves the problem of uneven heating caused by the thick neck and thin body of the blank. It does not require additional thickening of the bottle wall to compensate for performance risks. The weight of the lightweight bottle can be further reduced from the current 30-35g, reducing PET raw material consumption to reduce production costs and carbon emissions, while improving transportation efficiency and better meeting the requirements of green packaging policies.

[0028] The heating components use an infrared heating plate for overall heating, a detection probe for real-time feedback, and a fifth push rod to drive a ring heating rod for directional supplementary heating, which further ensures the uniformity of the billet temperature and avoids molding defects and strength fluctuations caused by uneven heating.

[0029] The internal cooling method involves adjusting the height of the bottle with the first push rod and then using the second push rod to drive the nozzle to inject clean compressed air at 0.1-0.3MPa into the bottle opening. This method quickly removes heat from the bottle, reduces the difference in cooling rates between the inside and outside of the finished product, reduces residual stress, and effectively solves the problem of lightweight bottles being prone to cracking due to their thin walls. There is no need to retain additional wall thickness to offset the risk. Attached Figure Description

[0030] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0031] Figure 1 A schematic diagram of the overall structure of an embodiment of this application is shown;

[0032] Figure 2 A schematic diagram of the mounting holes in an embodiment of this application is shown;

[0033] Figure 3 A schematic diagram of the spray preheating component according to an embodiment of this application is shown;

[0034] Figure 4 A schematic diagram of the heating assembly according to an embodiment of this application is shown;

[0035] Figure 5 A schematic diagram of the cooling assembly according to an embodiment of this application is shown;

[0036] Figure 6 A schematic diagram of the protective section according to an embodiment of this application is shown;

[0037] Figure 7 A schematic diagram of the preheating section according to an embodiment of this application is shown;

[0038] Figure 8An exploded structural diagram of the heating assembly according to an embodiment of this application is provided;

[0039] Figure 9 A schematic diagram of the heating box according to an embodiment of this application is shown;

[0040] Figure 10 A schematic diagram of the structure of the detection box according to an embodiment of this application is shown;

[0041] Figure 11 A schematic diagram of the heating box according to an embodiment of this application is shown;

[0042] Figure 12 A schematic diagram of the heat-replenishing structure according to an embodiment of this application is shown.

[0043] Reference numerals: Casing-1, Control Cabinet-11, Mounting Hole-12, Conveyor Belt-2, Rotating Blank Holder-21, Tilting Unloading Platform-3, Spraying Preheating Assembly-4, Protective Part-41, Base-411, Mounting Platform-412, Third Push Rod-413, Connecting Block-414, Protective Plate-415, Sprayer-42, Preheating Part-43, Protective Shell-431, Fourth Push Rod-432, First Heat Insulation Plate-433, Connecting Joint-434, Second Heat Insulation Plate-435, I-Beam Plate-436, Heating Rod-437, etc. Heat assembly - 5, heating box - 51, heating shell - 511, infrared heating plate - 512, detection box - 52, detection shell - 521, detection probe - 522, reheating box - 53, reheating shell - 531, reheating structure - 532, fifth push rod - 5321, mounting head - 5322, docking plate - 5323, partition plate - 5324, annular heating rod - 5325, cooling assembly - 6, first push rod - 61, connecting block - 62, mounting plate - 63, second push rod - 64, clamping rod - 65, nozzle - 66. Detailed Implementation

[0044] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0045] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0047] It should be noted that the terms "a" and "several" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0048] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0049] Reference Figure 1 A lightweight blow molding apparatus for beer bottles includes a housing 1, a spray preheating component 4, a heating component 5, and a cooling component 6.

[0050] The housing 1 serves as the supporting frame for the entire device, providing installation positions for the control cabinet 11, conveyor belt 2, spray preheating component 4, heating component 5, and cooling component 6, and providing a regular structural layout for the production of plastic beer bottles.

[0051] A control cabinet 11 is fixedly installed on the outside of the casing 1. The control cabinet 11 controls the operation of the conveyor belt 2, the start and stop of each component and the parameters through electrical connection, so as to realize the coordinated work of each process.

[0052] In this embodiment, the control cabinet 11 is a Mitsubishi PLC-configured control cabinet. This type of control cabinet is often paired with a Japanese Mitsubishi PLC programmable controller, which can adapt to the control requirements of various models of blow molding equipment. It has the function of storing and adjusting process parameters, and can stably control key processes of beer bottle blow molding such as the transmission of the conveyor belt 2 and the temperature of the heating component 5. It can also realize operation such as motion control, parameter setting, and fault self-check display through a Chinese human-machine interface touch screen. It is a widely used existing control cabinet related technical solution in blow molding equipment.

[0053] The housing 1 is connected to a transmission belt 2, which serves as a conveyor for transporting blanks and finished products. The belt 2 transports the rotating blank holder 21 and the blank above it in sequence along a set direction, thus realizing the assembly line operation of plastic bottle production.

[0054] In this embodiment, the conveyor belt 2 adopts a step-by-step movement method, moving strictly according to the distance between two blanks each time, and sequentially conveying the rotating blank holder 21 and the blank above it along the set direction, ensuring batch processing efficiency while matching the station spacing of the spray preheating component 4 and the heating component 5.

[0055] Multiple sets of rotating blank holders 21 are fixedly connected to the outer side of the conveyor belt 2. The rotating blank holders 21 provide a channel for the heating rods 437 of the preheating section 43 to extend into the blank, and can also drive the blank to rotate, ensuring the uniformity of spraying and heating in the spraying preheating component 4. It should be noted that the rotating blank holders 21 and how they are fixedly installed on the outer side of the conveyor belt 2 are existing known technologies, so they will not be described in detail.

[0056] A flip-over unloading platform 3 is provided at the tail end of the conveyor belt 2. The flip-over unloading platform 3 is used to receive the beer bottles after blow molding and cooling. The finished products are smoothly transferred from the side of the conveyor belt 2 to the subsequent collection stage through the flipping action.

[0057] The spray preheating component 4 provides uniformly heated and surface-fitting blanks for lightweight blow molding through the dual functions of spraying and internal preheating, solving the problem of uneven external heating in traditional methods. Its station spacing matches the movement distance of the conveyor belt 2 each time, and it can process two blanks at the same time.

[0058] Heating component 5 is used to heat the blank to ensure that its temperature reaches the standard and is uniform, thus meeting the requirements of the blank for thin-walled molding of lightweight bottles.

[0059] Cooling component 6 is used to quickly dissipate heat from inside and outside the bottle, reduce residual stress, prevent lightweight thin-walled bottles from cracking due to uneven cooling, and ensure the strength of the finished product.

[0060] In one embodiment, reference is made to Figures 2-6 The spray preheating component 4, heating component 5 and cooling component 6 are all electrically connected to the control cabinet 11. The spray preheating component 4 and heating component 5 are arranged sequentially along the conveying direction of the conveyor belt 2, and the cooling component 6 is correspondingly arranged at the flipping and unloading end of the flipping unloading table 3.

[0061] The spray preheating assembly 4 includes a protective section 41, a sprayer 42, and a preheating section 43. All three are electrically connected to the control cabinet 11. The protective section 41 and the sprayer 42 are arranged opposite each other along the width direction of the conveyor belt 2, and their center lines are perpendicular and coplanar with the conveying direction of the conveyor belt 2. The preheating section 43 is located between the protective section 41 and the sprayer 42.

[0062] The protective unit 41 blocks coating splashes during the spraying process, preventing contamination of equipment or impact on other processes. By being set opposite to the spraying machine 42, it can correspond to the spraying direction of the spraying machine 42, forming a face-to-face layout of spraying and blocking, maximizing the interception of splashed coating.

[0063] The spraying machine 42 is used to spray an appropriate coating onto the surface of the blank to improve the subsequent heating efficiency, reduce the heat loss of the blank surface, and ensure the temperature stability required for thin-wall forming. Because it is set opposite to the protective part 41, it can form a semi-enclosed spraying space to ensure that the coating only acts on the blank on the conveyor belt 2 and avoid the spread of the spraying range.

[0064] In this embodiment, the spraying machine 42 is a Graco Pro XP 70, used to spray non-toxic and compatible coatings onto the surface of the blank, such as food-grade silicone coatings, modified polyolefin coatings, etc. The selected coatings are all food contact grade non-toxic materials that meet the safety requirements of GB4806 (Chinese standard) and FDA (US standard) for food contact materials. They are odorless, have no migration risk, and do not produce toxic or harmful substances after heating.

[0065] Graco Pro Xp 70 is a mature automatic spraying equipment for the plastic molding industry, featuring precise quantity control and uniform atomization. It can be linked with the control cabinet 11 via PLC for control, making it suitable for mass production scenarios. It is a publicly available technology.

[0066] The preheating section 43 can preheat the interior of the blank and work with the spraying machine 42 to achieve the working mode of external spraying and internal heating, avoiding molding defects caused by excessive temperature difference between the inside and outside of the blank, and adapting to the uniform molding requirements of lightweight bottle thin walls.

[0067] A mounting hole 12 is provided at the bottom of the housing 1 corresponding to the installation position of the preheating part 43. The top of the mounting hole 12 is perpendicular to the reserved hole of the rotating billet base 21. The top of the preheating part 43 can extend into the billet through the mounting hole 12 and the reserved hole of the rotating billet base 21. The mounting hole 12 provides a through channel for the preheating part 43, so that the top of the preheating part 43 can extend into the billet through the reserved hole of the housing 1 and the rotating billet base 21, thus ensuring the realization of the preheating function.

[0068] The heating assembly 5 includes a heating box 51, a detection box 52, and a reheating box 53. All three are electrically connected to the control cabinet 11. The three are sequentially spliced ​​along the conveying direction of the conveyor belt 2 and fixedly installed on the front end of the blow molding mold inlet. They are also mounted on the top of the housing 1 and span the surface of the conveyor belt 2. The inner cavities of the heating box 51, the detection box 52, and the reheating box 53 correspond vertically to the surface of the conveyor belt 2.

[0069] The heating box 51 is used to uniformly heat the blank after it has been pretreated by the spray preheating component 4, and quickly raise the blank temperature to a suitable range close to that of blow molding.

[0070] The detection box 52 is used to detect the surface and internal temperature of the billet after it has been heated by the heating box 51 in real time, and transmit the temperature data synchronously to the control cabinet 11 to provide a basis for targeted heating of the supplementary heating box 53, so as to avoid the billet from affecting the molding quality of the lightweight bottle due to local low temperature.

[0071] Based on the feedback data from the detection box 52, the heating box 53 adjusts the temperature of the billet that does not meet the standard through the control cabinet 11 to carry out localized targeted heating, so as to ensure that the overall temperature of each group of billets is uniform and consistent, and to ensure that the lightweight beer bottles produced in batches have uniform specifications and wall thickness.

[0072] The three components can be sequentially spliced ​​along the conveyor belt 2 to form a continuous processing flow of heating-detection-heat replenishment. When the billet is conveyed by the conveyor belt 2, there is no need for additional transfer. Heating, detection and correction are completed directly in the same component, avoiding temperature loss or contamination of the billet during process connection, and ensuring the continuity and efficiency of temperature control.

[0073] Fixedly installed on the front side of the blow molding die inlet, it can achieve seamless connection from heating correction to blow molding. The blank after temperature correction by the heating box 53 can directly enter the blow molding die, reducing the conveying distance of the blank from the heating component 5 to the die, reducing the risk of temperature loss, and ensuring that the blank is blow molded at the optimal temperature, which is suitable for the high requirements of molding temperature for lightweight thin-walled bottles.

[0074] The cooling assembly 6 includes a first push rod 61, which is located at the flipping and unloading end of the flipping unloading platform 3. The first push rod 61 is the lifting drive component of the cooling assembly 6 and is electrically connected to the control cabinet 11. Located at the flipping and unloading end of the flipping unloading platform 3, the lifting stroke can be precisely adjusted by the control cabinet 11 to drive the subsequent components to lift as a whole, so that the nozzle 66 is precisely aligned with the opening of the beer bottle with the bottle mouth facing upward after flipping, adapting to the cooling and positioning requirements of beer bottles of different heights and specifications.

[0075] A connecting block 62 is fixedly installed at the top of the first push rod 61. The connecting block 62 serves as a connecting component to smoothly transmit the lifting power of the first push rod 61 to the mounting plate 63 and related components of the nozzle 66, thereby preventing deviation during height adjustment and ensuring the alignment accuracy between the nozzle 66 and the bottle opening.

[0076] A mounting plate 63 is fixedly installed on the top of the connecting block 62. The mounting plate 63 is used to provide mounting and fixing for the second push rod 64.

[0077] A second push rod 64 is fixedly installed on any side of the mounting plate 63. The second push rod 64 serves as a lateral drive component for the nozzle 66. Its extension stroke can be adjusted by the control cabinet 11 to push the clamping rod 65 and the nozzle 66 to move towards the bottle opening, so that the nozzle 66 is accurately aligned with the top of the bottle opening, ensuring that the cooling gas can be effectively injected into the bottle.

[0078] A clamping rod 65 is fixedly installed at the output end of the second push rod 64. The clamping rod 65 is used to fix the nozzle 66 and at the same time provides a stable connection point for the second push rod 64 to ensure that its driving force can be smoothly transmitted to the nozzle 66.

[0079] The clamping rod 65 is symmetrically fitted with nozzles 66 on both sides. The nozzles 66 can inject cooling gas into the beer bottle with the bottle opening facing upward. In this embodiment, the cooling gas is clean compressed air, which can quickly remove the heat inside the bottle and achieve efficient cooling in conjunction with external heat dissipation, thus shortening the shaping cycle.

[0080] The nozzle 66 is connected to an external air source, which is electrically connected to the control cabinet 11 to provide a stable gas output for the nozzle 66. The air pressure can be precisely adjusted through the control cabinet 11 to limit the pressure range to 0.1-0.3MPa, which can meet the rapid cooling requirements of lightweight thin-walled bottles and avoid excessive pressure that could cause the bottle to break or deform.

[0081] The first push rod 61, the second push rod 64, and the air source are all electrically connected to the control cabinet 11.

[0082] In one embodiment, reference is made to Figure 6 The protective part 41 includes a base 411, which is arranged opposite to the sprayer 42 along the width direction of the conveyor belt 2. The base 411 is located on the side of the conveyor belt 2 away from the sprayer 42. The base 411 serves as a basic support component, providing stable support for subsequent components.

[0083] The top of the base 411 is fixedly mounted with a mounting platform 412. The mounting platform 412 serves as a carrier for raising the third push rod 413. It can raise the third push rod 413 and the protective plate 415 to a height corresponding to the blank and the spraying machine 42, ensuring that the protective plate 415 can accurately cover the spraying area and avoid blind spots due to improper height.

[0084] A third push rod 413 is fixedly installed on the top of the mounting platform 412. The stroke of the third push rod 413 can be adjusted by the control cabinet 11 to drive the protective plate 415 to move back and forth. When spraying, the third push rod 413 will drive the protective plate 415 to move closer to the spraying machine 42. After the spraying is completed, the third push rod 413 will drive the protective plate 415 to retract backward to avoid affecting the conveying of the blank.

[0085] A docking block 414 is fixedly installed at the output end of the third push rod 413. The docking block 414 serves as a connecting component between the third push rod 413 and the protective plate 415. It is used to increase the connection area between the third push rod 413 and the protective plate 415, ensuring that the driving force is transmitted smoothly and preventing the protective plate 415 from shifting or deforming due to uneven force.

[0086] The output end of the third push rod 413 is fixedly installed with a protective plate 415 through the docking block 414. The protective plate 415 can be adjusted in position under the drive of the third push rod 413 to accurately block the coating sprayed by the spraying machine 42. After the spraying is completed, it will retract and will not affect the conveying action of the conveyor belt 2 and the rotating blank holder 21.

[0087] In this embodiment, a top plate can be optionally installed at the top of the protective plate 415. The top plate can prevent the sprayed coating from drifting out from the top. Furthermore, an adsorption machine can be installed on the top of the top plate. The suction end of the adsorption machine penetrates through the top plate and can adsorb the splashed coating.

[0088] The third push rod 413 is electrically connected to the control cabinet 11.

[0089] In one embodiment, reference is made to Figure 7 The preheating unit 43 includes a protective shell 431, which is disposed between the base 411 and the sprayer 42. The protective shell 431 is used to provide a stable installation position for the fourth push rod 432, and at the same time can prevent the non-toxic coating sprayed by the sprayer 42 from splashing onto the internal drive components, thus ensuring the stability of equipment operation.

[0090] The protective shell 431 has a fourth push rod 432 fixedly installed inside. The extension stroke can be precisely adjusted by the control cabinet 11 to drive the heating rod 437 to complete the action of extending into the billet for preheating and then withdrawing after completion, ensuring that it matches the conveying rhythm of the conveyor belt 2 and does not affect the continuous transfer of the billet.

[0091] A first heat insulation plate 433 is fixedly installed at the top of the protective shell 431. The first heat insulation plate 433 is used to block the high temperature of the heating rod 437 from being conducted to the protective shell 431 and the internal fourth push rod 432.

[0092] In this embodiment, the first heat insulation board 433 is made of food-grade high-temperature resistant ceramic fiber board.

[0093] The output end of the fourth push rod 432 passes through the protective shell 431 and the first heat insulation plate 433 in sequence, and is fixedly installed with a connector 434. The connector 434 serves as a connecting component between the fourth push rod 432 and the second heat insulation plate 435, which can ensure that the driving force of the fourth push rod 432 is smoothly transmitted to the second heat insulation plate 435, avoid deviation during the lifting process, and ensure the alignment accuracy of the heating rod 437 and the reserved hole of the rotating blank seat 21.

[0094] A second heat insulation plate 435 is fixedly installed at the top of the connector 434. The second heat insulation plate 435, in conjunction with the first heat insulation plate 433, forms a double heat insulation protection, further blocking the heat of the heating rod 437 from being conducted to the fourth push rod 432.

[0095] The second heat insulation board 435 is made of the same material as the first heat insulation board 433, which is food-grade high-temperature resistant ceramic fiber board.

[0096] The top of the second heat insulation plate 435 is fixedly installed with an I-shaped plate 436. The I-shaped plate 436 is used to provide an installation position for the heating rod 437. The symmetrical layout on the left and right sides can be adapted to the rhythm of the conveyor belt 2 conveying two blanks each time.

[0097] Heating rods 437 are symmetrically installed on the left and right sides of the top of the I-shaped plate 436. The top of the heating rods 437 can pass through the mounting hole 12 and the reserved hole of the rotating blank seat 21 and extend into the blank. The axis of the heating rods 437 is collinear with the axis of the rotating blank seat 21.

[0098] After the heating rod 437 extends into the interior of the billet, it can directly heat the interior of the billet, thereby achieving rapid preheating of the billet; its axis is collinear with the axis of the rotating billet seat 21, which can ensure that the heating rod 437 extends into the billet in the center and avoid uneven local heating.

[0099] The fourth push rod 432 and the heating rod 437 are electrically connected to the control cabinet 11.

[0100] The number of mounting holes 12 corresponds one-to-one with the number of heating rods 437, and the inner diameter of the mounting holes 12 is larger than the outer diameter of the heating rods 437. The one-to-one correspondence ensures that the two heating rods 437 symmetrically installed at the top of the I-shaped plate 436 each have an independent through channel, which can simultaneously pass through the mounting holes 12 and the reserved holes of the rotating blank seat 21 and extend into the interior of the two sets of blanks. This matches the production rhythm of the conveyor belt 2 conveying two blanks each time, ensuring synchronous internal preheating of the two blanks and improving pretreatment efficiency.

[0101] The design of the inner diameter being larger than the outer diameter of the heating rod 437 not only provides sufficient clearance for the lifting and lowering action of the heating rod 437 driven by the fourth push rod 432, but also avoids friction and jamming with the inner wall of the mounting hole 12 during movement, ensuring that the heating rod 437 can smoothly extend into or out of the blank.

[0102] In one embodiment, reference is made to Figures 8-12 The heating box 51 includes a heating shell 511, which is sequentially spliced ​​with the detection shell 521 and the supplementary heating shell 531 to form a semi-enclosed heating space to reduce heat leakage; at the same time, the heating shell 511 also provides an installation position for the infrared heating plate 512.

[0103] Infrared heating plates 512 are symmetrically arranged on the inner walls of the left and right sides of the heating shell 511. The infrared heating plates 512 are used as heating components. Existing technology models such as 220V-500W far-infrared heating plates are selected. They are heated by infrared radiation, which can heat up quickly, have high thermal efficiency, and have good heating uniformity. They can act on two sets of billets on the conveyor belt 2 at the same time.

[0104] The testing box 52 includes a testing shell 521, which is spliced ​​with a heating shell 511 and a supplementary heating shell 531 to form a continuous processing channel, protecting the internal testing probe 522 from external interference.

[0105] A detection probe 522 is installed through the inner wall of any side of the detection housing 521, and the detection end of the detection probe 522 faces the belt surface of the conveyor belt 2. The detection probe 522 is a non-contact infrared temperature measurement probe in the prior art, such as model OS137-1. The detection end faces the belt surface of the conveyor belt 2, and it can accurately detect the surface temperature of the billet on the rotating billet seat 21 from a distance.

[0106] The heating chamber 53 includes a heating shell 531, and a heating structure 532 is fixedly installed on the top of the heating shell 531. One end of the heating structure 532 extends through the top of the heating shell 531 into its interior. The heating shell 531 is spliced ​​with the detection shell 521 and is close to the feed port of the blow molding die, which can shorten the conveying distance of the billet after heating and reduce temperature loss. At the same time, its top provides an installation point for the heating structure 532, ensuring that the heating component can accurately extend into the inner cavity to act on the billet.

[0107] The heating shell 511, the detection shell 521 and the heat replenishing shell 531 are sequentially spliced ​​along the conveying direction of the conveyor belt 2 and fixedly installed on the front end of the blow molding mold inlet. They are also mounted on the top of the machine housing 1 and span the belt surface of the conveyor belt 2. The inner cavities of the heating shell 511, the detection shell 521 and the heat replenishing shell 531 correspond vertically to the belt surface of the conveyor belt 2.

[0108] The infrared heating plate 512, the detection probe 522 and the heating structure 532 are all electrically connected to the control cabinet 11.

[0109] In one embodiment, reference is made to Figure 12 The heating structure 532 includes a fifth push rod 5321, which is fixedly installed on the top of the heating shell 531. The fifth push rod 5321 is electrically connected to the control cabinet 11. The extension stroke can be precisely adjusted by the control cabinet 11 to drive the annular heating rod 5325 to move up and down, so as to achieve the action of approaching the billet for heating and moving away after completion. This ensures the heating efficiency and avoids interference with the conveyor belt 2 and the rotating billet seat 21.

[0110] Furthermore, the output end of the fifth push rod 5321 passes through the top of the heat-replenishing shell 531 and is fixedly installed inside it with an installation head 5322. The installation head 5322 serves as a connecting component between the fifth push rod 5321 and the docking plate 5323, which can increase the connection area between the fifth push rod 5321 and the docking plate 5323, ensure the smooth transmission of driving force, avoid deviation during the lifting process, and ensure the alignment accuracy between the annular heating rod 5325 and the rotating blank seat 21.

[0111] The bottom of the mounting head 5322 is fixedly connected to the docking plate 5323, which provides a stable mounting base for the partition 5324 and the annular heating rod 5325.

[0112] A partition 5324 is fixedly installed on the side of the docking plate 5323 near the conveyor belt 2. The partition 5324 is made of heat insulation material, specifically high-temperature resistant ceramic fiber material, which can block the heat of the annular heating rod 5325 from being conducted to the docking plate 5323 and the fifth push rod 5321.

[0113] A ring-shaped heating rod 5325 is fixedly installed on the side of the partition 5324 near the conveyor belt 2, and the axis of the ring-shaped heating rod 5325 is collinear with the axis of the rotating blank seat 21. The ring-shaped heating rod 5325 is used as a heat supplementing execution component. It is a ring-shaped electric heating rod in the prior art, such as the model HRL-220 / 300, which is electrically connected to the control cabinet 11. It can accurately perform local heating around the outer circumference of the blank. Its ring structure can make the heat radiate evenly to the surface of the blank and avoid single-point overheating.

[0114] The fifth push rod 5321 and the annular heating rod 5325 are both electrically connected to the control cabinet 11.

[0115] Working principle:

[0116] This application uses the control cabinet 11 as the core control unit, and establishes electrical connections with each component through wires. The drive components are connected to the control system in the order of the first push rod 61, the second push rod 64, the third push rod 413, the fourth push rod 432, the fifth push rod 5321 and the stepper motor of the conveyor belt 2. The heating / spraying components include the sprayer 42, the heating rod 437, the infrared heating plate 512 and the ring heating rod 5325. The detection / feedback component is the detection probe 522. The auxiliary component is the solenoid valve of the external air source. The device forms a closed-loop control of centralized command-component response-data feedback by means of Mitsubishi PLC programming logic.

[0117] During operation, the control cabinet 11 first instructs the stepper motor of the conveyor belt 2 to move the blank at intervals of two blanks at a time. After precisely stopping at the spraying preheating station, the third push rod 413, the fourth push rod 432, and the spraying machine 42 are started simultaneously: the third push rod 413 drives the protective plate 415 to move towards the spraying machine 42, forming a semi-enclosed spraying space with the spraying machine 42 and the conveyor belt 2 to prevent coating splashing; the fourth push rod 432 drives the heating rod 437 to pass through the mounting hole 12 and the reserved hole of the rotating blank seat 21, and extend into the blank for heating.

[0118] After the spraying machine 42 completes the spraying according to the set parameters, the control cabinet 11 instructs the third push rod 413 to drive the protective plate 415 to retract and reset, and the fourth push rod 432 to drive the heating rod 437 to exit and reset. The conveyor belt 2 continues to send the blank to the heating component 5.

[0119] After the billet enters the heating station, the control cabinet 11 starts the infrared heating plate 512 for overall heating. When the detection probe 522 reports that the temperature is not up to standard, the fifth push rod 5321 drives the annular heating rod 5325 to descend to the outer periphery of the billet for reheating. After the reheating is completed, the fifth push rod 5321 drives the annular heating rod 5325 to retract and reset.

[0120] After the preform is blow-molded, it is sent to the flipping unloading table 3. After the flipping unloading table places the bottle mouth upward, the control cabinet 11 directly commands the second push rod 64 to push the nozzle 66 to move towards the bottle mouth. After the nozzle is aligned with the bottle mouth, the external air source is controlled to spray air at a pressure of 0.1-0.3MPa for cooling. After cooling is completed, the second push rod 64 drives the nozzle 66 to retract and reset. The flipping unloading table 3 transfers the finished product, and the conveyor belt 2 circulates into the next batch for processing. The entire process achieves efficient and stable production of lightweight beer bottles through the precise cooperation of various driving components.

[0121] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0122] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. A lightweight blow molding device for beer bottles, comprising a housing (1), a control cabinet (11) fixedly installed on the outside of the housing (1), a transmission belt (2) connected to the housing (1), a plurality of rotating blank holders (21) fixedly arranged on the outside of the transmission belt (2), and a flipping unloading platform (3) correspondingly provided at the tail end of the transmission belt (2). characterized in that It also includes a preheating component (4), a heating component (5) and a cooling component (6), all of which are electrically connected to the control cabinet (11). The preheating component (4) and the heating component (5) are arranged sequentially along the conveying direction of the conveyor belt (2), and the cooling component (6) is correspondingly arranged at the flipping and unloading end of the flipping unloading table (3). The preheating assembly (4) includes a protective part (41), a sprayer (42) and a preheating part (43), all of which are electrically connected to the control cabinet (11). The protective part (41) and the sprayer (42) are arranged opposite to each other along the width direction of the conveyor belt (2), and their center lines are perpendicular and coplanar with the conveying direction of the conveyor belt (2). The preheating part (43) is located between the protective part (41) and the sprayer (42). The bottom of the housing (1) is provided with a mounting hole (12) corresponding to the installation position of the preheating part (43). The top of the mounting hole (12) is perpendicular to the reserved hole of the rotating blank seat (21). The top of the preheating part (43) can extend into the blank through the mounting hole (12) and the reserved hole of the rotating blank seat (21). The heating assembly (5) includes a heating box (51), a detection box (52) and a reheating box (53), all of which are electrically connected to the control cabinet (11). The three are sequentially spliced ​​along the conveying direction of the conveyor belt (2) and fixedly installed on the front end of the blow molding mold inlet. They are also mounted on the top of the housing (1) and span the surface of the conveyor belt (2). The inner cavities of the heating box (51), the detection box (52) and the reheating box (53) correspond vertically to the surface of the conveyor belt (2). The cooling assembly (6) includes a first push rod (61), which is located at the flipping and unloading end of the flipping unloading platform (3). A connecting block (62) is fixedly installed at the top of the first push rod (61), and an mounting plate (63) is fixedly installed at the top of the connecting block (62). A second push rod (64) is fixedly installed on any side of the mounting plate (63). A clamping rod (65) is fixedly installed at the output end of the second push rod (64). Spray nozzles (66) are symmetrically embedded on the left and right sides of the clamping rod (65), and the spray nozzles (66) are connected to an external air source. The first push rod (61), the second push rod (64) and the air source are all electrically connected to the control cabinet (11).

2. The beer bottle lightweight blow molding apparatus according to claim 1, characterized by: The protective part (41) includes a base (411), which is arranged opposite to the sprayer (42) along the width direction of the conveyor belt (2), and the base (411) is located on the side of the conveyor belt (2) away from the sprayer (42) in the width direction. A mounting platform (412) is fixedly installed on the top of the base (411), and a third push rod (413) is fixedly installed on the top of the mounting platform (412). A docking block (414) is fixedly installed on the output end of the third push rod (413), and a protective plate (415) is fixedly installed on the output end of the third push rod (413) through the docking block (414). The third push rod (413) is electrically connected to the control cabinet (11).

3. The beer bottle lightweight blow molding apparatus according to claim 2, characterized by: The preheating section (43) includes a protective shell (431), which is disposed between the base (411) and the sprayer (42). A fourth push rod (432) is fixedly installed inside the protective shell (431). A first heat insulation plate (433) is fixedly installed at the top of the protective shell (431). The output end of the fourth push rod (432) passes through the protective shell (431) and the first heat insulation plate (433) in sequence, and is fixedly installed with a connector (434). A second heat insulation plate (435) is fixedly installed at the top of the connector (434). An I-shaped plate (436) is fixedly installed at the top of the second heat insulation plate (435). Heating rods (437) are symmetrically installed on the left and right sides of the top of the I-shaped plate (436). The top of the heating rod (437) can extend into the interior of the billet through the mounting hole (12) and the reserved hole of the rotating billet seat (21), and the axis of the heating rod (437) is collinear with the axis of the rotating billet seat (21); The fourth push rod (432) and the heating rod (437) are electrically connected to the control cabinet (11).

4. The beer bottle lightweight blow molding apparatus according to claim 3, characterized by: The number of mounting holes (12) corresponds one-to-one with the number of heating rods (437), and the inner diameter of the mounting holes (12) is larger than the outer diameter of the heating rods (437).

5. The lightweight blow molding apparatus for beer bottles according to claim 1, characterized in that: The heating box (51) includes a heating shell (511), and infrared heating plates (512) are symmetrically arranged on the inner walls of the left and right sides of the heating shell (511). The detection box (52) includes a detection shell (521), and a detection probe (522) is provided through the inner wall of any side of the detection shell (521), with the detection end of the detection probe (522) facing the belt surface of the conveyor belt (2); The heat exchange box (53) includes a heat exchange shell (531), and a heat exchange structure (532) is fixedly installed on the top of the heat exchange shell (531). One end of the heat exchange structure (532) extends through the top of the heat exchange shell (531) into its interior. The heating shell (511), the detection shell (521) and the heat replenishing shell (531) are sequentially spliced ​​along the conveying direction of the conveyor belt (2) and fixedly installed on the front end of the blow molding mold inlet. They are also mounted on the top of the machine housing (1) and span the belt surface of the conveyor belt (2). The inner cavities of the heating shell (511), the detection shell (521) and the heat replenishing shell (531) correspond vertically to the belt surface of the conveyor belt (2). The infrared heating plate (512), the detection probe (522) and the heat replenishment structure (532) are all electrically connected to the control cabinet (11).

6. The beer bottle lightweight blow molding apparatus according to claim 5, characterized by: The heat-replenishing structure (532) includes a fifth push rod (5321), which is fixedly installed on the top of the heat-replenishing shell (531). The output end of the fifth push rod (5321) passes through the top of the heat-replenishing shell (531) and is fixedly installed with an installation head (5322) inside it. The bottom of the installation head (5322) is fixedly connected with a docking plate (5323). A partition plate (5324) is fixedly installed on the side of the docking plate (5323) near the belt surface of the conveyor belt (2). An annular heating rod (5325) is fixedly installed on the side of the partition plate (5324) near the belt surface of the conveyor belt (2). The axis of the annular heating rod (5325) is collinear with the axis of the rotating blank seat (21). The fifth push rod (5321) and the annular heating rod (5325) are both electrically connected to the control cabinet (11).

7. The lightweight blow molding apparatus for beer bottles according to claim 6, characterized in that: The partition (5324) is made of heat-insulating material.

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