Rapid cooling equipment for plastic lunch box mold

Abstract

The utility model discloses rapid cooling equipment for a plastic lunch box mold, which belongs to the field of lunch box manufacturing, comprises a cooling box body arranged on the mold, and is characterized in that a cooling pipe assembly is arranged in the cooling box body; the cooling pipe assembly comprises a first cooling pipe, a second cooling pipe, an adjusting pipe A and a sealing plate, wherein the first cooling pipe and the second cooling pipe are arranged along the periphery of the die cavity and communicate with the water inlet system and the water outlet system correspondingly, the two ends of the adjusting pipe A are arranged on the first cooling pipe and the second cooling pipe in a sliding and sleeving mode correspondingly, and the sealing plate is fixedly arranged at the end, away from the water inlet system, of the first cooling pipe. A water outlet is formed in the pipe wall of the end, close to the sealing plate, of the first cooling pipe, and a water passing channel with the inner diameter larger than the diameter of the sealing plate is formed in the adjusting pipe A. When the working strength of a mold is large, and the injection molding temperature and heat generated by working of a machine are large, the cooling effect is enhanced, and the service life of the mold is prolonged. And the mold temperature is still controlled at an ideal temperature.

Description

Technical Field

[0001] This utility model relates to the field of lunchbox manufacturing technology, specifically a rapid cooling device for plastic lunchbox molds. Background Technology

[0002] Lunch boxes are common household items, specifically designed to hold food. Also known as bento boxes, lunch boxes are produced using stamping dies. This process involves applying pressure to the material using a die mounted on a press, causing separation or plastic deformation to create the lunch box. The temperature and fluctuations of the die affect the shrinkage rate, deformation, dimensional stability, machine strength, stress cracking, and surface quality of the product. The main manifestations are surface smoothness, residual stress, crystallinity, and thermal bending.

[0003] An investigation revealed that Chinese utility model patent CN212884466U discloses a self-cooling lunchbox stamping die, comprising a lower die base, a fixed frame, a buffer structure, a die cavity, and a lower die. The top of the lower die base is fixed with a fixed frame, and the top of the fixed frame is fixed with the lower die. Air holes are provided at the corners of the top of the lower die. A blower is fixed inside the fixed frame, and air pipes are fixed on both sides of the top of the blower. The tops of the air pipes extend into the interior of the lower die and communicate with the air holes. An upper die is provided above the lower die, and an upper die base is fixed to the top of the upper die. A die cavity is provided inside the upper die, and the die cavity cooperates with the lower die. Buffer structures are provided on both sides of the upper die.

[0004] The aforementioned lunchbox stamping die introduces external coolant into the cooling channel through the inlet and exits it through the outlet. Heat dissipation fins below the cooling channel dissipate the heat generated during stamping, and the coolant flow within the channel rapidly carries away the heat, thus reducing the stamping temperature and improving the lunchbox forming rate. However, after continuous long-term operation, the die's temperature gradually increases. Different machine operating speeds also affect the die's operating temperature. Simple cooling equipment cannot adaptively adjust the cooling effect according to the die's working time and intensity, making it difficult to maintain the die at ideal temperatures throughout the operation.

[0005] Therefore, this utility model provides a rapid cooling device for plastic lunch box molds to solve the above problems. Utility Model Content

[0006] This utility model provides a rapid cooling device for plastic lunch box molds, which aims to solve the problems mentioned in the background art, such as the difficulty of keeping the mold under ideal temperature conditions during operation by existing lunch box stamping mold cooling devices. To achieve the above objectives, this utility model provides the following technical solution: a rapid cooling device for a plastic lunchbox mold, comprising a cooling box body disposed on the mold, characterized in that: a cooling pipe assembly is disposed inside the cooling box body, the cooling pipe assembly comprising a first cooling pipe and a second cooling pipe disposed along the periphery of the mold cavity and respectively connected to a water inlet system and a water outlet system, an adjusting pipe A having its two ends slidably fitted onto the first cooling pipe and the second cooling pipe, and a sealing plate fixedly disposed at the end of the first cooling pipe away from the water inlet system, a water outlet being disposed on the pipe wall at the end of the first cooling pipe near the sealing plate, a water passage having an inner diameter larger than the diameter of the sealing plate being opened inside the adjusting pipe A, the water outlet being located inside the adjusting pipe A, the cooling pipe assembly further comprising a third cooling pipe disposed along the periphery of the mold cavity and spaced apart from the first cooling pipe, the two ends of the third cooling pipe being respectively connected to the water inlet system and the water outlet system, a driving mechanism being disposed on the adjusting pipe A to drive the adjusting pipe A to move, by controlling the movement of the adjusting pipe A, the first cooling pipe, the second cooling pipe and the third cooling pipe work simultaneously, enhancing the cooling effect and keeping the mold temperature controlled at the ideal temperature. Preferably, the length of the water passage is greater than the length of the outlet along the axial direction of the first cooling pipe. When the first and second cooling pipes need to work, all outlets can be moved into the water passage to ensure that the coolant flows fully and to guarantee the cooling effect.

[0007] Preferably, the cooling box has an internal receiving groove, and a driving mechanism is installed within the receiving groove. The driving mechanism includes a baffle fixedly installed within the receiving groove and fixedly connected to the first cooling pipe, a sliding plate installed within the receiving groove and moving axially along the second cooling pipe, and an electric telescopic rod with its two ends fixedly connected to the inner wall of the receiving groove and the sliding plate, respectively. The sliding plate is fixedly connected to the adjusting pipe A. By controlling the electric telescopic rod, the sliding plate can be moved during operation. The sliding plate drives the adjusting pipe A to move, thereby controlling whether the first and second cooling pipes are working, thus controlling the cooling efficiency and keeping the temperature within the target range.

[0008] Preferably, a water supply mechanism is provided inside the cooling box on one side of the cooling pipe assembly. The water supply mechanism includes a first water supply pipe, a second water supply pipe, and a regulating pipe B, one end of which is connected to the water inlet system. The regulating pipe B in the water supply mechanism regulates the relationship between the first and second water supply pipes in the same way as the first cooling pipe, second cooling pipe, and regulating pipe A in the cooling pipe assembly. The end of the second water supply pipe away from the regulating pipe B is connected to the middle section of the first and third cooling pipes. Coolant is then transported from the first water supply pipe through the regulating pipe B and then through the second water supply pipe to the middle section of the first or third cooling pipe, reducing the overall temperature difference of the coolant at different locations in the mold. This invention moves the sealing plate 211 on the first cooling pipe 21 to the water passage 231 by moving the adjusting pipe A23. The coolant flows out from the outlet 212, passes through the water passage 231, enters the second cooling pipe 22, and is finally discharged. The first cooling pipe 21, the second cooling pipe 22 and the third cooling pipe 24 work at the same time. When the working intensity of the mold is high and the injection temperature plus the heat generated by the machine itself is large, the cooling effect is enhanced, and the mold temperature is still controlled at the ideal temperature.

[0009] This utility model uses a sliding plate 32 to move the regulating pipe A23 to connect the first cooling pipe 21 and the second cooling pipe 22. When working, it also moves the regulating pipe B43 to connect the first water supply pipe 41 and the second water supply pipe 42. Another coolant is transported from the first water supply pipe 41 through the regulating pipe B43 and then through the second water supply pipe 42 to the middle section of the first cooling pipe 21 or the third cooling pipe 24, thereby reducing the temperature difference of the coolant at different positions in the mold. Attached Figure Description

[0010] Figure 1 This is an overall elevation view of the present invention during mold operation;

[0011] Figure 2 This is a schematic diagram showing the distribution of the cooling pipe assembly and water conveying mechanism of this utility model;

[0012] Figure 3 This is a vertical sectional view of the present invention;

[0013] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0014] In the diagram: 1. Cooling box; 11. Receiving tank; 2. Cooling pipe assembly; 21. First cooling pipe; 211. Sealing plate; 212. Water outlet; 22. Second cooling pipe; 23. Regulating pipe A; 24. Third cooling pipe; 231. Water passage; 3. Drive mechanism; 31. Baffle; 32. Sliding plate; 33. Electric telescopic rod; 4. Water supply mechanism; 41. First water supply pipe; 42. Second water supply pipe; 43. Regulating pipe B. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides a rapid cooling device for a plastic lunch box mold, including a cooling box 1 mounted on the mold. The cooling box 1 contains a cooling pipe assembly 2. The cooling pipe assembly 2 includes a first cooling pipe 21 and a second cooling pipe 22 arranged around the periphery of the mold cavity and connected to an inlet water system and an outlet water system, respectively; an adjusting pipe A23 slidably fitted onto the first cooling pipe 21 and the second cooling pipe 22 at both ends; and a sealing plate 211 fixedly mounted on the end of the first cooling pipe 21 away from the inlet water system. An outlet 212 is provided on the pipe wall of the first cooling pipe 21 near the sealing plate 211. The adjusting pipe A23 has an inner diameter larger than that of the sealing plate 211. The cooling pipe assembly 2 includes a water passage 231 with a diameter, and the outlet 212 is located inside the regulating pipe A23. The cooling pipe assembly 2 also includes a third cooling pipe 24 arranged along the periphery of the mold cavity and spaced apart from the first cooling pipe 21. The two ends of the third cooling pipe 24 are connected to the water inlet system and the water outlet system, respectively. The regulating pipe A23 is provided with a driving mechanism 3 for driving the regulating pipe A23 to move. When the working intensity of the mold is low, the regulating pipe A23 is moved, and the outlet 212 on the first cooling pipe 21 is blocked through the inner wall of the regulating pipe A23, so that the first cooling pipe 21 and the second cooling pipe 22 are not connected. At this time, only the third cooling pipe 24 undertakes the cooling work, and the mold temperature is controlled within the ideal temperature range. When adjusting the machine speed to speed up production, or when the mold is used continuously for a long time, the working intensity of the mold is high, and the temperature of injection molding plus the heat generated by the machine itself is large. At this time, moving the regulating pipe A23 moves the sealing plate 211 on the first cooling pipe 21 into the water passage 231. The diameter of the sealing plate 211 is smaller than the inner diameter of the water passage 231 to ensure that the coolant passes smoothly. The coolant flows out from the outlet 212, passes through the water passage 231, and then enters the second cooling pipe 22, and finally exits. The first cooling pipe 21, the second cooling pipe 22 and the third cooling pipe 24 work at the same time, which enhances the cooling effect and keeps the mold temperature at the ideal temperature.

[0017] The length of the water passage 231 is greater than the length of the outlet 212 along the axial direction of the first cooling pipe 21. When the first cooling pipe 21 and the second cooling pipe 22 need to work, all the outlets 212 can be moved into the water passage 231 to ensure that the coolant flows fully and to guarantee the cooling effect.

[0018] Furthermore, the cooling box 1 is provided with a receiving groove 11, and a driving mechanism 3 is provided within the receiving groove 11. The driving mechanism 3 includes a baffle 31 fixedly disposed within the receiving groove 11 and fixedly connected to the first cooling pipe 21, a sliding plate 32 disposed within the receiving groove 11 and moving along the axial direction of the second cooling pipe 22, and an electric telescopic rod 33 with its two ends fixedly connected to the inner wall of the receiving groove 11 and the sliding plate 32, respectively. The sliding plate 32 is fixedly connected to the adjusting pipe A23. By controlling the electric telescopic rod 33, the sliding plate 32 can be moved during operation. The sliding plate 32 drives the adjusting pipe A23 to move, thereby controlling whether the first cooling pipe 21 and the second cooling pipe 22 are working, thus controlling the cooling efficiency and keeping the temperature within the target range. The baffle 31 can fix and wrap around the first cooling pipe 21, increasing the contact area and thus better removing heat.

[0019] Furthermore, a water supply mechanism 4 is provided inside the cooling box 1 on one side of the cooling pipe assembly 2. The water supply mechanism 4 includes a first water supply pipe 41, a second water supply pipe 42 and an adjusting pipe B43, one end of which is connected to the water inlet system. The adjusting pipe B43 in the water supply mechanism 4 adjusts the relationship between the first water supply pipe 41 and the second water supply pipe 42 in the same way as the first cooling pipe 21, the second cooling pipe 22 and the adjusting pipe A23 in the cooling pipe assembly 2. The end of the second water supply pipe 42 away from the adjusting pipe B43 is connected to the middle section of the first cooling pipe 21 and the third cooling pipe 24. During the production of lunch boxes using molds, the large temperature difference between the initial and final stages of the coolant's passage through the mold can lead to significant temperature variations at different locations within the mold. This can result in serious consequences such as product deformation or even surface cracking during injection molding. When the mold is under heavy workload, the sliding plate 32 moves, causing the regulating pipe A23 to connect the first cooling pipe 21 and the second cooling pipe 22. Simultaneously, the regulating pipe B43 also connects the first water supply pipe 41 and the second water supply pipe 42. Additionally, a portion of the coolant is transported from the first water supply pipe 41 through the regulating pipe B43 and then through the second water supply pipe 42 to the middle section of either the first cooling pipe 21 or the third cooling pipe 24, thereby reducing the overall temperature difference of the coolant at different locations within the mold.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A plastic lunch box mold rapid cooling device, comprising a cooling box (1) arranged on the mold, characterized in that: The cooling box (1) is internally provided with a cooling pipe assembly (2), the cooling pipe assembly (2) includes a first cooling pipe (21) and a second cooling pipe (22) which are arranged along the periphery of the mold cavity and respectively communicated with the water inlet system and the water outlet system, an adjusting pipe A (23) which is slidably sleeved on the first cooling pipe (21) and the second cooling pipe (22) at two ends, and a sealing plate (211) which is fixedly arranged at the end of the first cooling pipe (21) away from the water inlet system, the first cooling pipe (21) is provided with a water outlet (212) on the pipe wall at the end close to the sealing plate (211), the adjusting pipe A (23) is internally provided with a water passing channel (231) with a diameter larger than that of the sealing plate (211), the water outlet (212) is located in the adjusting pipe A (23), the cooling pipe assembly (2) further includes a third cooling pipe (24) which is arranged along the periphery of the mold cavity and spaced from the first cooling pipe (21), the third cooling pipe (24) is connected with the water inlet system and the water outlet system at two ends, and the adjusting pipe A (23) is provided with a driving mechanism (3) for driving the adjusting pipe A (23) to move.

2. A plastic lunch box mold rapid cooling apparatus according to claim 1, characterized in that: The length of the water passing channel (231) is greater than the length of the water outlet (212) in the axial direction of the first cooling pipe (21).

3. A rapid cooling apparatus for plastic lunch box mold according to claim 2, characterized in that: The cooling box (1) is internally provided with a containing groove (11), the containing groove (11) is internally provided with a driving mechanism (3), the driving mechanism (3) includes a baffle (31) which is fixedly arranged in the containing groove (11) and fixedly connected with the first cooling pipe (21), a sliding plate (32) which is arranged in the containing groove (11) and moves in the axial direction of the second cooling pipe (22), and an electric telescopic rod (33) which is fixedly connected at two ends with the inner wall of the containing groove (11) and the sliding plate (32), and the sliding plate (32) is fixedly connected with the adjusting pipe A (23).

4. The rapid cooling apparatus for plastic lunch box mold according to claim 1, characterized in that: The cooling box (1) is internally provided with a water conveying mechanism (4) located on one side of the cooling pipe assembly (2), the water conveying mechanism (4) includes a first water conveying pipe (41) connected with the water inlet system at one end, a second water conveying pipe (42), and an adjusting pipe B (43), the structure principle of the adjusting pipe B (43) adjusting the first water conveying pipe (41) and the second water conveying pipe (42) in the water conveying mechanism (4) is the same as that of the first cooling pipe (21), the second cooling pipe (22) and the adjusting pipe A (23) in the cooling pipe assembly (2), and the second water conveying pipe (42) is communicated with the middle sections of the first cooling pipe (21) and the third cooling pipe (24) at the end away from the adjusting pipe B (43).

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