A plastic bottle preform cooling device

Abstract

The application relates to the field of cooling equipment and discloses a plastic bottle embryo cooling device which comprises a lifting structure, a bottle body centering and fixing structure and an internal and external uniform cooling structure. The lifting structure comprises a device shell, a telescopic air cylinder, an upper transmission force rod, a lower transmission force rod and a placing plate. The bottle body centering and fixing structure comprises a bottle opening centering block, a spring base and a spring. The internal and external uniform cooling structure comprises a refrigerating machine, a cold air telescopic pipeline, an internal cooling pipe and a spring. The bottle opening centering block can center and fix the bottle embryo, so that the internal cooling pipe can be inserted into the bottle embryo, until the placing plate and the cooling tank body are combined, and the cold air can be sprayed from the air holes on the internal cooling pipe and the external cold air spraying port through the cold air telescopic pipeline, so that the internal and external bottle embryo can be cooled simultaneously, the bottle embryo can be uniformly cooled, and the bottle embryo is not prone to deformation. When the bottle embryo is separated from the cooling tank body, the bottle opening centering block can seal the bottom of the cooling tank body, the overflow of the cold air in the cooling tank body can be reduced, and the waste of resources can be saved.

Description

Technical Field

[0001] This application belongs to the field of cooling equipment technology, specifically a cooling device for plastic preforms. Background Technology

[0002] Plastic bottle preform cooling equipment mainly addresses the cooling requirements of preforms after injection molding and the limitations of traditional cooling methods. Traditional methods rely on self-heating cooling via a cooling line, meaning the preforms cannot be fully cooled before entering the hopper, leading to uneven temperature distribution. This affects blow molding quality, resulting in defective products such as uneven hardness, deformation, reduced production efficiency, and increased costs. Most equipment relies solely on conveyor belts or simple air cooling, and technologies like simultaneous internal and external cooling have low cooling efficiency, making it difficult to meet the demands of high-efficiency production.

[0003] For example, application CN214773937U discloses a plastic preform cooling device, including a base, with hydraulic rods fixedly installed on both sides of the top of the base. This plastic preform cooling device has an opening in the top of the cooling box, allowing the plastic preform to be placed inside the cooling box through the opening. Two clamping plates are provided on the top of the cooling box, with pull rods fixed to one side of the two clamping plates. Mounting blocks are fixed to both sides of the top of the cooling box, allowing the pull rods to be movably connected to the mounting blocks. Second return springs are movably sleeved on the outer sides of the two pull rods. Pulling the pull rods increases the distance between the two clamping plates. When the plastic preform is placed inside the cooling box, the pull rods can be released, causing the two second return springs to return to their original positions, bringing the two clamping plates closer together and clamping and fixing the plastic preform, thus achieving the effect of conveniently clamping and fixing the plastic preform. However, the preform cooling device in this application is prone to uneven cooling inside and outside the preform during the cooling process, which can lead to preform deformation. Furthermore, when the preform is removed after cooling is complete, the cold air in the cooling tank can easily overflow, resulting in resource waste. Summary of the Invention

[0004] The purpose of this application is to provide a plastic preform cooling device in order to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: A plastic preform cooling device includes a lifting structure, a bottle body centering and fixing structure, and an internal and external uniform cooling structure. The lifting structure includes an equipment shell, a telescopic cylinder, an upper force rod, a lower force rod, and a placement plate. The bottle body centering and fixing structure includes a bottle mouth centering block, a spring base, and a spring. The internal and external uniform cooling structure includes a refrigeration unit, a cold air telescopic pipe, an internal cooling pipe, and a spring.

[0006] By adopting the above technical solution, during the operation of the equipment, the preform to be cooled is placed on the placement plate, and the telescopic cylinder and the refrigeration unit are started. The telescopic cylinder retracts and descends along the slide along the upper force rod and rises along the slide along the lower force rod. The tip of the preform placed above the placement plate will press against the bottle mouth centering block. The structure of the bottle mouth centering block can center and fix the preform, so that the inner cooling pipe can be inserted into the preform. As it continues to rise, it will compress the spring until the placement plate and the cooling tank are combined. The cold air generated by the refrigeration unit is sprayed out from the air hole on the inner cooling pipe and the outer cold air nozzle through the cold air telescopic pipe, which can cool the inside and outside of the preform at the same time, so that the preform is cooled evenly and is not easily deformed.

[0007] After cooling is complete, the telescopic cylinder is activated, which, through the upper and lower force rods, causes the placement plate to separate. The bottle mouth centering block also moves downward under the compression of the spring, allowing the bottle preform to detach from the cooling tank. The bottle mouth centering block seals the bottom of the cooling tank, reducing the leakage of cold air from the cooling tank and saving resources.

[0008] In a preferred embodiment, telescopic cylinders are fixedly connected to the inner sides of the equipment housing. An upper force rod and a lower force rod are rotatably connected to the front end of the telescopic cylinders. The front ends of the upper force rod and the lower force rod are respectively rotatably connected to a cooling tank and a placement plate.

[0009] By adopting the above technical solution, the cooling tank and the placement plate can be separated or combined, making it convenient to put in or take out the preform.

[0010] In a preferred embodiment, a partition is fixedly connected to the inner side of the equipment housing, a refrigeration unit is fixedly connected above the partition, a cold air expansion pipe is fixedly connected below the refrigeration unit, the partition is passed through the lower part of the cold air expansion pipe, and it is connected to the top of the cooling tank.

[0011] By adopting the above technical solution, cold air can be generated and transported to the cooling tank through cold air expansion pipes.

[0012] In a preferred embodiment, a spring is provided on the inner side of the cooling tank, and an inner cooling pipe is fixedly connected to the top of the cooling tank. The inner cooling pipe and the spring are connected to a cold air expansion pipe.

[0013] By adopting the above technical solution, cold air is ejected through the air holes on the outside of the spring and the inner cooling pipe, which can cool the inside and outside of the preform at the same time, so that the preform is cooled evenly and is not easily deformed.

[0014] In a preferred embodiment, an annular baffle is fixedly connected to the bottom of the cooling tank.

[0015] By adopting the above technical solution, the bottle neck centering block can be prevented from detaching from the cooling tank under the action of the spring, thus ensuring the stable operation of the equipment.

[0016] In a preferred embodiment, a spring base is slidably connected to the inner side of the cooling tank, and a bottle mouth centering block is fixedly connected to the inner side of the spring base.

[0017] By adopting the above technical solution, the preform can be centered and fixed when it rises, and the leakage of cold air from the cooling tank can be reduced when the preform descends.

[0018] In a preferred embodiment, a spring is fixedly connected above the spring base.

[0019] By adopting the above technical solution, the stable operation of the bottle neck centering block within the cooling tank can be guaranteed.

[0020] In a preferred embodiment, a groove is provided on the inner back of the device housing, and a cooling tank and a placement plate are slidably connected to the inner side of the groove.

[0021] By adopting the above technical solution, it can be ensured that the cooling tank and the placement plate operate smoothly under the drive of the upper and lower force transmission rods.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: During operation, the preform to be cooled is placed on the placement plate. The telescopic cylinder and the refrigeration unit are then activated. The telescopic cylinder retracts, allowing the upper force rod to descend along the slide and the lower force rod to rise along the slide. The tip of the preform placed on the placement plate abuts against the bottle mouth centering block. The structure of the bottle mouth centering block ensures that the preform is centered and fixed, allowing the inner cooling pipe to extend into the preform. As the cylinder continues to rise, it compresses the spring until the placement plate and the cooling tank merge. The cold air generated by the refrigeration unit is ejected through the cold air telescopic pipe from the vents on the inner cooling pipe and the outer cold air nozzle, simultaneously cooling the inside and outside of the preform, resulting in uniform cooling and preventing deformation.

[0023] After cooling is complete, the telescopic cylinder is activated, which, through the upper and lower force rods, causes the placement plate to separate. The bottle mouth centering block also moves downward under the compression of the spring, allowing the bottle preform to detach from the cooling tank. The bottle mouth centering block seals the bottom of the cooling tank, reducing the leakage of cold air from the cooling tank and saving resources. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the device in this application; Figure 2 This is a bottom view of the cooling tank structure of the device in this application; Figure 3This is a schematic cross-sectional view of the cooling tank of the device in this application; Figure 4 This is a schematic diagram of the internal structure of the cooling tank in the device described in this application; Figure 5 This is a schematic diagram of the installation structure of the bottle neck centering block in the device of this application.

[0025] The markings in the diagram are: 1. Equipment casing; 2. Telescopic cylinder; 3. Upward force transmission rod; 4. Downward force transmission rod; 5. Cooling tank; 6. Cold air telescopic pipe; 7. Refrigeration unit; 8. Slide; 9. Placement plate; 10. Partition plate; 11. Bottle mouth centering block; 12. Inner cooling pipe; 13. Spring; 14. Outer cold air nozzle; 15. Spring base; 16. Annular stop block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0027] Reference Figure 1-5 A plastic preform cooling device includes a lifting structure, a bottle body centering and fixing structure, and an internal and external uniform cooling structure. The lifting structure includes an equipment shell 1, a telescopic cylinder 2, an upper force transmission rod 3, a lower force transmission rod 4, and a placement plate 9. The bottle body centering and fixing structure includes a bottle mouth centering block 11, a spring base 15, and a spring 13. The internal and external uniform cooling structure includes a refrigeration unit 7, a cold air telescopic pipe 6, an internal cooling pipe 12, and a spring 13.

[0028] During operation, the preform to be cooled is placed on the placement plate 9. The telescopic cylinder 2 and the refrigeration unit 7 are started. The telescopic cylinder 2 retracts and descends along the slide 8 via the upper force rod 3 and ascends along the slide 8 via the lower force rod 4. The tip of the preform placed on the placement plate 9 will press against the bottle mouth centering block 11. The structure of the bottle mouth centering block 11 can center and fix the preform, so that the inner cooling pipe 12 can extend into the preform. As it continues to rise, it will compress the spring 13 until the placement plate 9 and the cooling tank 5 are combined. The cold air generated by the refrigeration unit 7 is sprayed out from the air hole on the inner cooling pipe 12 and the outer cold air nozzle 14 through the cold air telescopic pipe 6, which can cool the inside and outside of the preform at the same time, so that the preform is cooled evenly and is not easily deformed.

[0029] After cooling is complete, the telescopic cylinder 2 is activated, and through the upper force rod 3 and the lower force rod 4, it drives the cooling tank 5 and the placement plate 9 to separate. The bottle mouth centering block 11 will also move down under the compression of the spring 13, so that the bottle preform can be separated from the cooling tank 5. The bottom of the cooling tank 5 can be sealed by the bottle mouth centering block 11, which can reduce the leakage of cold air from the cooling tank 5 and save resources.

[0030] Telescopic cylinders 2 are fixedly connected to both sides of the inner side of the equipment casing 1. The front end of the telescopic cylinders 2 is rotatably connected to an upper force transmission rod 3 and a lower force transmission rod 4. The front ends of the upper force transmission rod 3 and the lower force transmission rod 4 are respectively rotatably connected to a cooling tank 5 and a placement plate 9. This can drive the cooling tank 5 and the placement plate 9 to separate or merge, making it convenient to put in or take out the preforms.

[0031] A partition 10 is fixedly connected to the inner side of the equipment casing 1. A refrigeration unit 7 is fixedly connected above the partition 10. A cold air expansion pipe 6 is fixedly connected below the refrigeration unit 7. The partition 10 passes through the lower part of the cold air expansion pipe 6 and is connected to the top of the cooling tank 5. Cold air can be generated and transported into the cooling tank 5 through the cold air expansion pipe 6.

[0032] A spring 13 is provided on the inner side of the cooling tank 5, and an inner cooling pipe 12 is fixedly connected to the top of the cooling tank 5. The inner cooling pipe 12 and the spring 13 are connected to the cold air expansion pipe 6. Cold air is ejected through the air holes on the outside of the spring 13 and the inner cooling pipe 12, which can cool the inside and outside of the preform at the same time, so that the preform is cooled evenly and is not easily deformed.

[0033] An annular stop block 16 is fixedly connected to the bottom of the cooling tank 5. This prevents the bottle mouth centering block 11 from dislodging from the cooling tank 5 under the action of the spring 13, thus ensuring the stable operation of the equipment.

[0034] A spring base 15 is slidably connected to the inner side of the cooling tank 5, and a bottle mouth centering block 11 is fixedly connected to the inner side of the spring base 15. This allows the preform to be centered and fixed when it rises, and reduces the leakage of cold air from the cooling tank 5 when it descends.

[0035] A spring 13 is fixedly connected to the top of the spring base 15. This ensures the stable operation of the bottle mouth centering block 11 within the cooling tank 5.

[0036] A groove 8 is provided on the inner back of the equipment housing 1, and a cooling tank 5 and a placement plate 9 are slidably connected to the inner side of the groove 8. This ensures that the cooling tank 5 and the placement plate 9 operate smoothly under the drive of the upper force transmission rod 3 and the lower force transmission rod 4.

[0037] The implementation principle of the plastic preform cooling device embodiment of this application is as follows: The preform to be cooled is placed on the placement plate 9, and the telescopic cylinder 2 and the refrigeration unit 7 are started. The telescopic cylinder 2 retracts and descends along the slide groove 8 via the upper force rod 3 and rises along the slide groove 8 via the lower force rod 4. The tip of the preform placed above the placement plate 9 will press against the bottle mouth centering block 11. The structure of the bottle mouth centering block 11 can center and fix the preform, so that the inner cooling pipe 12 can be inserted into the preform. As it continues to rise, the spring 13 will be compressed until the placement plate 9 and the cooling tank 5 are combined. The cold air generated by the refrigeration unit 7 is sprayed out from the air hole on the inner cooling pipe 12 and the outer cold air nozzle 14 through the cold air telescopic pipe 6, which can cool the inside and outside of the preform at the same time, so that the preform is cooled evenly and is not easily deformed. After cooling is complete, the telescopic cylinder 2 is activated, and through the upper force rod 3 and the lower force rod 4, it drives the cooling tank 5 and the placement plate 9 to separate. The bottle mouth centering block 11 will also move down under the compression of the spring 13, so that the bottle preform can be separated from the cooling tank 5. The bottom of the cooling tank 5 can be sealed by the bottle mouth centering block 11, which can reduce the leakage of cold air from the cooling tank 5 and save resources.

[0038] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A cooling device for plastic preforms, characterized in that: It includes a lifting structure, a bottle centering and fixing structure, and an internal and external uniform cooling structure. The lifting structure includes an equipment shell (1), a telescopic cylinder (2), an upper force rod (3), a lower force rod (4), and a placement plate (9). The bottle centering and fixing structure includes a bottle mouth centering block (11), a spring base (15), and a spring (13). The internal and external uniform cooling structure includes a refrigerator (7), a cold air telescopic pipe (6), an internal cooling pipe (12), and a spring (13).

2. The plastic preform cooling device as described in claim 1, characterized in that: Telescopic cylinders (2) are fixedly connected to the inner sides of the outer shell (1) of the equipment. The front end of the telescopic cylinder (2) is rotatably connected to an upper force rod (3) and a lower force rod (4). The front ends of the upper force rod (3) and the lower force rod (4) are respectively rotatably connected to a cooling tank (5) and a placement plate (9).

3. The plastic preform cooling device as described in claim 1, characterized in that: A partition (10) is fixedly connected to the inner side of the equipment housing (1). A refrigerator (7) is fixedly connected above the partition (10). A cold air expansion pipe (6) is fixedly connected below the refrigerator (7). The partition (10) passes through the bottom of the cold air expansion pipe (6) and is connected to the top of the cooling tank (5).

4. The plastic preform cooling device as described in claim 3, characterized in that: A spring (13) is provided on the inner side of the cooling tank (5), and an inner cooling pipe (12) is fixedly connected to the top of the cooling tank (5). The inner cooling pipe (12) and the spring (13) are connected to the cold air expansion pipe (6).

5. A plastic preform cooling device as described in claim 4, characterized in that: The bottom of the cooling tank (5) is fixedly connected to an annular baffle (16).

6. The plastic preform cooling device as described in claim 5, characterized in that: A spring base (15) is slidably connected to the inner side of the cooling tank (5), and a bottle mouth centering block (11) is fixedly connected to the inner side of the spring base (15).

7. A plastic preform cooling device as described in claim 1, characterized in that: A spring (13) is fixedly connected above the spring base (15).

8. A plastic preform cooling device as described in claim 1, characterized in that: The inner back of the equipment housing (1) is provided with a groove (8), and a cooling tank (5) and a placement plate (9) are slidably connected to the inner side of the groove (8).

Images