Plastic box forming cooling mold

Abstract

The utility model provides a kind of plastic box forming cooling mould.The plastic box forming cooling mould includes: base, fixedly installed with mounting bracket on the base;Upper die and lower die, the upper die and lower die are all located on the mounting bracket, and the lower die is equipped with mould cavity, box body cooling cavity and box bottom cooling cavity;Cooling mechanism, the cooling mechanism is located on the lower die, for partition cooling when forming.The plastic box forming cooling mould provided by the utility model can control the cooling speed for different wall thickness parts of the product, and improve the product forming quality.

Description

Technical Field

[0001] This utility model relates to the field of plastic product mold technology, and in particular to a cooling mold for molding plastic boxes. Background Technology

[0002] Plastic boxes are containers made primarily of plastic through processes such as injection molding, blow molding, vacuum forming, and thermoforming. They are used for packaging, storing, transporting, or displaying various items.

[0003] During the molding process of plastic boxes, due to the difference in wall thickness between the box body and the bottom, the thicker areas cool down relatively slowly, while the thinner areas cool down faster. Traditional mold cooling systems are often unable to effectively address the uneven cooling caused by this difference in wall thickness. This uneven cooling can lead to warping, stress concentration, shrinkage, and dents in the plastic box, seriously affecting its quality and dimensional accuracy.

[0004] Therefore, it is necessary to provide a plastic box molding and cooling mold to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the technical problem that traditional mold cooling systems often struggle to effectively handle uneven cooling caused by differences in wall thickness, this utility model provides a cooling mold for plastic box molding.

[0006] The plastic box forming cooling mold provided by this utility model includes: a base, on which an mounting frame is fixedly installed; an upper mold and a lower mold, both of which are mounted on the mounting frame, the lower mold having a mold cavity, a box body cooling cavity and a box bottom cooling cavity; and a cooling mechanism, which is mounted on the lower mold for performing zoned cooling during forming.

[0007] Preferably, the cooling mechanism includes a coil, a heat sink, a first three-way solenoid valve, a first liquid extraction pipe, a second liquid extraction pipe, a circulation pump, a second three-way solenoid valve, a first liquid inlet pipe, and a second liquid inlet pipe. The coil is fixedly installed on the lower mold, and the heat sink is sleeved on the coil. The first three-way solenoid valve is fixedly connected to the liquid inlet end of the coil. The liquid outlet ends of the first and second liquid extraction pipes are respectively fixedly connected to the two liquid inlet ends of the first three-way solenoid valve. The liquid inlet ends of the first and second liquid extraction pipes extend into the body cooling chamber and the bottom cooling chamber of the box, respectively. The circulation pump is fixedly installed on the lower mold, and the liquid inlet end of the circulation pump is connected to the liquid outlet end of the coil. The second three-way solenoid valve is fixedly connected to the liquid outlet end of the circulation pump. The first and second liquid inlet pipes are respectively fixedly connected to the two liquid inlet ends of the second three-way solenoid valve. The liquid outlet ends of the first and second liquid inlet pipes extend into the body cooling chamber and the bottom cooling chamber of the box, respectively.

[0008] Preferably, a hydraulic rod is fixedly mounted on the mounting frame, and the output rod of the hydraulic rod is fixed to the upper mold.

[0009] Preferably, two rotating rods are rotatably mounted on the mounting frame, and a rotating motor is fixedly mounted on one side of the mounting frame. Either of the rotating rods is connected to the output shaft of the rotating motor through a coupling.

[0010] Preferably, a mounting frame is fixedly installed on the lower mold, and a cooling fan is fixedly installed inside the mounting frame, the cooling fan corresponding to the serpentine tube.

[0011] Preferably, a first liquid injection pipe and a second liquid injection pipe are fixedly connected to the cooling cavity of the box body and the cooling cavity of the box bottom, respectively, and a sealing valve is provided on both the first liquid injection pipe and the second liquid injection pipe.

[0012] Preferably, a guide rod is fixedly installed on the lower mold, and the guide rod slides through the mounting frame.

[0013] Compared with related technologies, the plastic box molding and cooling mold provided by this utility model has the following beneficial effects:

[0014] This utility model provides a cooling mold for molding plastic boxes:

[0015] By setting cooling chambers for the box body and bottom on the lower mold and coordinating with a cooling mechanism for zoned cooling, the cooling rate can be controlled separately for different wall thicknesses of the product (box body and bottom). This effectively solves the problem of uneven cooling caused by differences in wall thickness, improves product molding quality, and reduces defects such as deformation and cracking caused by uneven cooling. By setting a first three-way solenoid valve and a second three-way solenoid valve, the circulation flow rate and speed of the coolant in the cooling chambers for the box body and bottom can be controlled, achieving zoned cooling for areas with different wall thicknesses (box body and bottom). A heat dissipation plate is fitted on the coil. When the coolant circulates in the coil, the heat can be quickly dissipated to the surrounding environment through the heat dissipation plate, enhancing the cooling effect, shortening the cooling time, and improving production efficiency.

[0016] The mold opening and closing operation is achieved by using hydraulic rods, realizing automated control of mold opening and closing. During the molding process, the hydraulic rods continuously provide stable pressure to ensure that the upper and lower molds always remain in a tight fit, reducing manual operation and improving production efficiency and safety. By rotating the motor, the lower mold can be rotated to pour the molded plastic box out of the lower mold, completing the demolding operation.

[0017] The directional airflow generated by the cooling fan significantly accelerates the airflow around the coil, greatly improving its heat dissipation efficiency. This allows the coolant to cool down more quickly during circulation within the coil, thus cooling the mold more effectively. Coolant can be injected into the cooling chambers of the box body and bottom through the first and second injection pipes, ensuring the normal operation of the cooling system. The guide rod guides the movement of the upper mold, enabling it to accurately align with the lower mold during mold closing. Furthermore, the guide rod can withstand a certain lateral force, ensuring the stability of the mold. Attached Figure Description

[0018] Figure 1 A front view schematic diagram of a preferred embodiment of the plastic box molding cooling mold provided by this utility model;

[0019] Figure 2 A front sectional view of a preferred embodiment of the plastic box molding cooling mold provided by this utility model;

[0020] Figure 3 for Figure 1 The diagram shows an enlarged view of part A.

[0021] The following are the labels in the diagram: 1. Base; 2. Mounting bracket; 3. Upper mold; 4. Lower mold; 5. Mold cavity; 6. Cooling cavity of the box body; 7. Cooling cavity of the box bottom; 8. Coil; 9. Heat sink; 10. First three-way solenoid valve; 11. First liquid extraction pipe; 12. Second liquid extraction pipe; 13. Circulation pump; 14. Second three-way solenoid valve; 15. First liquid inlet pipe; 16. Second liquid inlet pipe; 17. Hydraulic rod; 18. Rotating rod; 19. Rotating motor; 20. Mounting frame; 21. Cooling fan; 22. First liquid injection pipe; 23. Second liquid injection pipe; 24. Guide rod. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1-3 ,in, Figure 1 A front view schematic diagram of a preferred embodiment of the plastic box molding cooling mold provided by this utility model; Figure 2 A front sectional view of a preferred embodiment of the plastic box molding cooling mold provided by this utility model; Figure 3 for Figure 1 The diagram shows an enlarged view of part A.

[0024] The plastic box molding cooling mold includes: a base 1, on which an mounting frame 2 is fixedly installed; an upper mold 3 and a lower mold 4, both of which are mounted on the mounting frame 2; the lower mold 4 having a mold cavity 5, a box body cooling cavity 6, and a box bottom cooling cavity 7; and a cooling mechanism, which is mounted on the lower mold 4 and is used for zoned cooling during molding. By setting the box body cooling cavity 6 and the box bottom cooling cavity 7 on the lower mold 4 and cooperating with the cooling mechanism for zoned cooling, the cooling rate can be controlled separately for different wall thickness parts (box body and box bottom) of the product, effectively solving the problem of uneven cooling caused by differences in wall thickness, improving the product molding quality, and reducing defects such as deformation and cracking caused by uneven cooling.

[0025] The cooling mechanism includes a serpentine tube 8, a heat sink 9, a first three-way solenoid valve 10, a first liquid extraction pipe 11, a second liquid extraction pipe 12, a circulation pump 13, a second three-way solenoid valve 14, a first liquid inlet pipe 15, and a second liquid inlet pipe 16. The serpentine tube 8 is fixedly installed on the lower mold 4, and the heat sink 9 is sleeved on the serpentine tube 8. The first three-way solenoid valve 10 is fixedly connected to the liquid inlet end of the serpentine tube 8. The liquid outlet ends of the first liquid extraction pipe 11 and the second liquid extraction pipe 12 are respectively fixedly connected to the two liquid inlet ends of the first three-way solenoid valve 10. The liquid inlet ends of the first liquid extraction pipe 11 and the second liquid extraction pipe 12 extend into the cooling chamber 6 of the box body and the cooling chamber 7 of the box bottom, respectively. The circulation pump 13 is fixedly installed on the lower mold 4, and the liquid inlet end of the circulation pump 13 is connected to the liquid outlet end of the serpentine tube 8. The first three-way solenoid valve 10 and the second three-way solenoid valve 14 are fixedly connected to the outlet end of the circulating pump 13. The first inlet pipe 15 and the second inlet pipe 16 are respectively fixedly connected to the two inlet ends of the second three-way solenoid valve 14. The outlet ends of the first inlet pipe 15 and the second inlet pipe 16 extend into the body cooling chamber 6 and the bottom cooling chamber 7, respectively. By setting the first three-way solenoid valve 10 and the second three-way solenoid valve 14, the circulation flow rate and speed of the coolant in the body cooling chamber 6 and the bottom cooling chamber 7 can be controlled to achieve zoned cooling of areas with different wall thicknesses (body and bottom). A heat dissipation plate 9 is sleeved on the coil tube 8. When the coolant circulates in the coil tube 8, the heat can be quickly dissipated to the surrounding environment through the heat dissipation plate 9, which enhances the cooling effect, shortens the cooling time, and improves production efficiency.

[0026] A hydraulic rod 17 is fixedly installed on the mounting frame 2. The output rod of the hydraulic rod 17 is fixed to the upper mold 3. The opening and closing operation of the mold is realized through the hydraulic rod 17, realizing the automated control of the mold opening and closing. During the molding process, the hydraulic rod 17 continuously provides stable pressure to ensure that the upper mold 3 and the lower mold 4 always maintain a tight fit, reducing manual operation and improving production efficiency and production safety.

[0027] Two rotating rods 18 are rotatably mounted on the mounting frame 2. A rotating motor 19 is fixedly mounted on one side of the mounting frame 2. Any one of the rotating rods 18 is connected to the output shaft of the rotating motor 19 through a coupling. The rotating motor 19 can drive the lower mold 4 to flip, and pour the molded plastic box out of the lower mold 4 to complete the demolding operation.

[0028] A mounting frame 20 is fixedly installed on the lower mold 4, and a cooling fan 21 is fixedly installed inside the mounting frame 20. The cooling fan 21 corresponds to the serpentine tube 8. The cooling fan 21 generates directional airflow, which can significantly accelerate the flow speed of the air around the serpentine tube 8 and greatly improve the heat dissipation efficiency of the serpentine tube 8. This allows the coolant to cool down more quickly when circulating inside the serpentine tube 8, thereby cooling the mold more effectively.

[0029] The body cooling chamber 6 and the bottom cooling chamber 7 are respectively fixedly connected to a first injection pipe 22 and a second injection pipe 23. Both the first injection pipe 22 and the second injection pipe 23 are equipped with sealing valves. Coolant can be injected into the body cooling chamber 6 and the bottom cooling chamber 7 through the first injection pipe 22 and the second injection pipe 23 to ensure the normal operation of the cooling system.

[0030] A guide rod 24 is fixedly installed on the lower mold 4. The guide rod 24 slides through the mounting frame 2 and provides guidance for the movement of the upper mold 3, so that the upper mold 3 can be accurately aligned with the lower mold 4 during the mold closing process. In addition, the guide rod 24 can withstand a certain lateral force, ensuring the stability of the mold.

[0031] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0032] The working principle of the plastic box molding and cooling mold provided by this utility model is as follows:

[0033] During use, in the mold preparation stage, coolant (such as water or other suitable cooling medium) is injected into the body cooling cavity 6 and the bottom cooling cavity 7 of the box through the first injection pipe 22 and the second injection pipe 23 respectively.

[0034] In the initial state, the output rod of hydraulic rod 17 is in the retracted state, and the upper mold 3 and the lower mold 4 are in the separated position. After injection molding is completed, hydraulic rod 17 is started, and the output rod of hydraulic rod 17 begins to extend, pushing the upper mold 3 to move downward until the upper mold 3 and the lower mold 4 are tightly fitted, completing the mold closing action. After the product is formed, hydraulic rod 17 is started again, causing its output rod to retract, driving the upper mold 3 to move upward and separate from the lower mold 4.

[0035] During cooling, the circulation pump 13 is started. At this time, the first three-way solenoid valve 10 and the second three-way solenoid valve 14 are in their initial settings (which can be preset according to actual cooling needs). The circulation pump 13 starts working. The coil 8, the body cooling chamber 6, the bottom cooling chamber 7, the first suction pipe 11, the second suction pipe 12, the first inlet pipe 15, and the second inlet pipe 16 together form the coolant circulation path. When it is necessary to focus on cooling the body area, the first three-way solenoid valve 10 and the second three-way solenoid valve 14 are adjusted by the control system so that the coolant mainly circulates from the body cooling chamber 6. That is, the first three-way solenoid valve 10 increases the amount of liquid entering from the first suction pipe 11 (connected to the body cooling chamber 6), while the second three-way solenoid valve 14 increases the amount of liquid exiting from the first inlet pipe 15 (connected to the body cooling chamber 6). The coolant circulates within the body cooling chamber 6. The coolant circulates, carrying away some heat from the box body. After being cooled by the coil 8, it returns to the box body cooling chamber 6. When focused cooling of the bottom area is needed, the first three-way solenoid valve 10 and the second three-way solenoid valve 14 are adjusted to increase the inflow from the second liquid extraction pipe 12 (connected to the bottom cooling chamber 7) and the outflow from the second liquid inlet pipe 16 (connected to the bottom cooling chamber 7). The coolant circulates within the bottom cooling chamber 7, cooling the bottom area. Again, after being cooled by the coil 8, it returns to the bottom cooling chamber 7. When more balanced cooling of both the box body and bottom is required, the two three-way solenoid valves are adjusted to ensure the coolant circulates between the box body cooling chamber 6 and the bottom cooling chamber 7 in a certain proportion, achieving overall zoned cooling control. As the coolant circulates and carries away heat within the coil 8, the cooling fan 21 is simultaneously activated. When it starts operating, it generates a directional airflow. The airflow generated by the cooling fan 21 blows directly onto the coil tube 8, accelerating the airflow around the coil tube 8 and quickly carrying away the heat dissipated from the coil tube 8 into the surrounding environment, thereby enhancing the heat dissipation effect of the coil tube 8 and enabling the coolant to cool down faster and maintain good cooling performance.

[0036] After cooling and molding, when demolding is required, the rotary motor 19 is started, and the output shaft of the rotary motor 19 begins to rotate. Through the coupling, it drives the connected rotating rod 18 to rotate. After one rotating rod 18 rotates, it will drive the other rotating rod 18 to rotate synchronously, causing the lower mold 4 to flip and realize the demolding of the plastic box. After demolding is completed, the rotary motor 19 is turned off, the rotating rod 18 stops rotating, the mold returns to the normal working state, and the subsequent production process continues.

[0037] Compared with related technologies, the plastic box molding and cooling mold provided by this utility model has the following beneficial effects:

[0038] This utility model provides a cooling mold for plastic box molding. By setting a cooling chamber 6 for the box body and a cooling chamber 7 for the box bottom on the lower mold 4, and cooperating with a cooling mechanism for zoned cooling, the cooling rate can be controlled separately for different wall thickness parts (box body and box bottom) of the product. This effectively solves the problem of uneven cooling caused by differences in wall thickness, improves the product molding quality, and reduces defects such as deformation and cracking caused by uneven cooling. By setting a first three-way solenoid valve 10 and a second three-way solenoid valve 14, the circulation flow rate and speed of the coolant in the cooling chamber 6 and the cooling chamber 7 of the box body can be controlled to achieve zoned cooling of different wall thickness areas (box body and box bottom). A heat dissipation plate 9 is sleeved on the coil 8. When the coolant circulates in the coil 8, the heat can be quickly dissipated to the surrounding environment through the heat dissipation plate 9, which enhances the cooling effect, shortens the cooling time, and improves production efficiency. The mold opening and closing operation is realized by the hydraulic rod 17, realizing the automated control of mold opening and closing. During the molding process, the hydraulic rod 17 continuously provides stable pressure to ensure that the upper mold 3 and the lower mold 4 always remain in a tight fit, reducing manual operation and improving production efficiency and safety. By rotating the motor 19, the lower mold 4 can be rotated to pour the molded plastic box out of the lower mold 4, completing the demolding operation. The cooling fan 21 generates directional airflow, which can significantly accelerate the airflow speed around the coil tube 8, greatly improving the heat dissipation efficiency of the coil tube 8. This allows the coolant to cool down more quickly when circulating in the coil tube 8, thus cooling the mold more effectively. The first injection pipe 22 and the second injection pipe 23 can inject coolant into the cooling chamber 6 of the box body and the cooling chamber 7 of the box bottom, ensuring the normal operation of the cooling system. The guide rod 24 provides guidance for the movement of the upper mold 3, enabling the upper mold 3 to be accurately aligned with the lower mold 4 during the mold closing process. The guide rod 24 can withstand a certain lateral force, ensuring the stability of the mold.

[0039] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, those skilled in the art who understand the principle of the above utility model can clearly understand the specific details of its power mechanism, power supply system and control system.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cooling mold for molding plastic boxes, characterized in that, include: A base, on which a mounting bracket is fixedly installed; The upper mold and the lower mold are both mounted on the mounting frame. The lower mold is provided with a mold cavity, a box body cooling cavity and a box bottom cooling cavity. A cooling mechanism is provided on the lower mold and is used to perform zoned cooling during molding.

2. The plastic box molding cooling mold according to claim 1, characterized in that, The cooling mechanism includes a coil, a heat sink, a first three-way solenoid valve, a first liquid extraction pipe, a second liquid extraction pipe, a circulation pump, a second three-way solenoid valve, a first liquid inlet pipe, and a second liquid inlet pipe. The coil is fixedly installed on the lower mold, and the heat sink is sleeved on the coil. The first three-way solenoid valve is fixedly connected to the liquid inlet end of the coil. The liquid outlet ends of the first and second liquid extraction pipes are respectively fixedly connected to the two liquid inlet ends of the first three-way solenoid valve. The liquid inlet ends of the first and second liquid extraction pipes extend into the body cooling chamber and the bottom cooling chamber of the box, respectively. The circulation pump is fixedly installed on the lower mold, and the liquid inlet end of the circulation pump is connected to the liquid outlet end of the coil. The second three-way solenoid valve is fixedly connected to the liquid outlet end of the circulation pump. The first and second liquid inlet pipes are respectively fixedly connected to the two liquid inlet ends of the second three-way solenoid valve. The liquid outlet ends of the first and second liquid inlet pipes extend into the body cooling chamber and the bottom cooling chamber of the box, respectively.

3. The plastic box forming cooling mold according to claim 1, characterized in that, A hydraulic rod is fixedly mounted on the mounting frame, and the output rod of the hydraulic rod is fixed to the upper mold.

4. The plastic box forming cooling mold according to claim 1, characterized in that, Two rotating rods are rotatably mounted on the mounting frame, and a rotating motor is fixedly mounted on one side of the mounting frame. Either of the rotating rods is connected to the output shaft of the rotating motor through a coupling.

5. The plastic box molding cooling mold according to claim 2, characterized in that, A mounting frame is fixedly installed on the lower mold, and a cooling fan is fixedly installed inside the mounting frame. The cooling fan corresponds to the serpentine tube.

6. The plastic box molding cooling mold according to claim 1, characterized in that, The cooling chamber of the box body and the cooling chamber of the box bottom are respectively fixedly connected to a first liquid injection pipe and a second liquid injection pipe, and both the first liquid injection pipe and the second liquid injection pipe are equipped with a sealing valve.

7. The plastic box molding cooling mold according to claim 1, characterized in that, A guide rod is fixedly installed on the lower mold, and the guide rod slides through the mounting frame.

Images