A mold for making plastic lunch boxes

Abstract

The present invention provides a mold for manufacturing plastic lunch boxes, belonging to the technical field of lunch box molds. A mold for manufacturing plastic lunch boxes includes: a first mounting plate and a second mounting plate. On the side where the first mounting plate and the second mounting plate are close to each other, a fixed mold plate mechanism and two fixing bars are respectively fixedly connected. On the side of the two fixing bars away from the second mounting plate, a connecting plate is fixedly connected. A thimble mechanism is installed between the second mounting plate and the connecting plate. On the side of the connecting plate away from the fixing bars, a movable mold plate mechanism is fixedly connected. The mold for manufacturing plastic lunch boxes of the present invention realizes the rapid adjustment of the lunch box size by designing adjustable convex and concave molds, at the same time realizes the uniform cooling of the mold cavity through a circulating cooling mechanism, and completes the change of the internal structure of the lunch box by disassembling the movable mold mechanism, and the air in the mold cavity can be excluded during injection molding through the splicing gap.

Description

Technical Field

[0001] The present invention relates to the technical field of lunch box molds, and specifically relates to a mold for manufacturing plastic lunch boxes. Background Art

[0002] Plastic lunch boxes are plastic containers made of food-grade plastic raw materials for the convenience of taking out food. They are a common household plastic product in our daily life and an indispensable plastic container for picnics or hiking. There are also various styles and sizes of plastic lunch boxes available. Square plastic lunch boxes can be used to store various seasonings, rectangular plastic lunch boxes are easy to store water-containing foods such as fruits, vegetables and seafood, and round plastic lunch boxes are suitable for storing sauces and various pickles. The production of lunch boxes is to extrude the melted plastic into a specific shape through a mold, and a hard lunch box can be obtained after cooling.

[0003] The main process of the existing lunch box production molds is to melt the raw material particles of PP polypropylene or PS polystyrene through an injection molding machine, and then extrude the molten raw material into the mold cavity through an extrusion port. During the extrusion process, the raw material enters the mold cavity and discharges the air in the mold cavity. Then, the cooling water pipes designed in the mold are used to accelerate the cooling efficiency of the raw material. After molding, the mold is opened, and the shaped lunch box is taken out by the ejection of the ejector mechanism and the manipulator and suction cup. Among them, the existing lunch box molds are all fixed types and can only produce lunch boxes of the same model during the production process. If adjustment is needed, it can only be completed by replacing the mold. Replacing the mold and debugging the mold both require a lot of time, and the cost of multiple molds is also relatively expensive. At the same time, when cooling the molten plastic in the mold cavity, it can only be completed through the designed cooling pipes. However, the shape of the lunch box has a certain inclination, which leads to a higher degree of difficulty in the design of the pipes, and it is also impossible to ensure that the distance between the pipes and the mold cavity is equal. As a result, it is easy to cause uneven cooling of the product and incomplete local shaping, and the softened part is prone to certain deformation during demolding, resulting in the scrapping of the product. Secondly, when the molten plastic is extruded into the mold cavity, the gas in the mold cavity can only be discharged through the exhaust grooves designed around the mold cavity, and additional exhaust grooves need to be designed.

[0004] Therefore, we have developed a new mold for manufacturing plastic lunch boxes. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the existing technology, the present invention provides a mold for manufacturing plastic lunch boxes, which solves the problems that the model of the existing lunch box mold cannot be adjusted, the cooling effect of the product is not good, and the exhaust method is single.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the present invention is realized by the following technical solutions:

[0009] A mold for making plastic lunch boxes, comprising: a first mounting plate and a second mounting plate. On the sides close to each other, a fixed mold plate mechanism and two fixed bars are respectively fixedly connected to the first mounting plate and the second mounting plate. On the sides away from the second mounting plate of the two fixed bars, a connecting plate is fixedly connected;

[0010] A thimble mechanism is installed between the second mounting plate and the connecting plate. On the side away from the fixed bars of the connecting plate, a moving mold plate mechanism is fixedly connected. On the tops of the first mounting plate and the second mounting plate, a fixed mold driving and adjusting mechanism and a moving mold driving and adjusting mechanism are respectively fixedly connected. A mold cooling mechanism is installed on the moving mold plate mechanism.

[0011] Preferably, the fixed mold plate mechanism is an adjustable fixed mold mechanism. The adjustable fixed mold mechanism includes a fixed fixed mold plate fixedly connected to one side of the first mounting plate. On one side of the fixed fixed mold plate, a central adjusting concave mold and a side sliding concave mold are respectively slidably connected. On the tops of the central adjusting concave mold and the side sliding concave mold, first limiting bars are fixedly connected. On one side of the adjustable fixed mold mechanism, a first cylinder is fixedly connected.

[0012] Through the above technical solutions, grooves corresponding to the central adjusting concave mold and the side sliding concave mold are opened on the fixed fixed mold plate, and through holes are opened on the top. The installation of the central adjusting concave mold and the side sliding concave mold can be completed through the through holes, and the pushing of the side sliding concave mold can be completed through the first cylinder. The two first limiting bars can complete the limit of the sliding. By taking out the central adjusting concave mold through the fixed mold driving and adjusting mechanism and the pushing of the side sliding concave mold by the first cylinder, the size of the lunch box can be reduced.

[0013] Preferably, the fixed mold plate mechanism is a fixed concave mold.

[0014] Through the above technical solutions, the fixed concave mold is an unadjustable fixed concave surface.

[0015] Preferably, the thimble mechanism includes a push plate slidably connected between the two fixed bars. On one side of the push plate, two adjusting plates are slidably connected. On one side of each of the two adjusting plates, a reset thimble is fixedly connected.

[0016] Through the above technical solutions, the driving device on the injection molding machine passes through the second mounting plate to push the push plate, and then pushes the two adjusting plates so that multiple reset thimbles eject the product. At the same time, when replacing the central adjusting convex mold, the second cylinder pushes the side sliding convex mold, which will also drive the reset thimble and the corresponding adjusting plate on one side to slide on one side of the connecting plate and the push plate respectively. Therefore, the ejection of the thimble mechanism can still be completed through the push plate.

[0017] Preferably, the moving template mechanism is an adjustable moving die mechanism. The adjustable moving die mechanism includes a fixed moving template fixedly connected to one side of the connecting plate. A central adjustable punch and a side sliding punch are respectively slidably connected to one side of the fixed moving template. Second limit bars are fixedly connected to the tops of the central adjustable punch and the side sliding punch. A second cylinder is installed on one side of the fixed moving template.

[0018] Through the above technical solution, similarly to the adjustable fixed die mechanism, the side sliding punch can be pushed by the second cylinder, and at the same time, the movement of the central adjustable punch can be completed by the moving die driving and adjusting mechanism.

[0019] Preferably, the moving template mechanism is a detachable moving die mechanism. The detachable moving die mechanism includes a fixed frame fixedly connected to one side of the connecting plate. A plurality of first convex modules and second convex modules are installed in the fixed frame.

[0020] Through the above technical solution, by disassembling and installing the first convex modules and the second convex modules and cooperating with the fixed female die, the change of the area division in the lunch box can be realized, and then lunch boxes of different models can be manufactured. At the same time, the gaps generated by the splicing of the plurality of first convex modules and the second convex modules can be used for exhausting the air of the extruded raw materials, and thus the exhaust groove does not need to be designed.

[0021] Preferably, the fixed die driving and adjusting mechanism includes a first support frame fixedly connected to the top of the first mounting plate. A third cylinder is fixedly connected to the first support frame. A fixed die connecting block is fixedly connected between the output end of the third cylinder and the first limit bar on the top of the central adjustable female die.

[0022] Through the above technical solution, the installation and pulling out of the central adjustable female die can be completed by the third cylinder, and then the size specification of the lunch box can be determined by increasing and decreasing the central adjustable female die.

[0023] Preferably, the moving die driving and adjusting mechanism includes a second support frame fixedly connected to the top of the second mounting plate. A fourth cylinder is fixedly connected to the second support frame. A moving die connecting block is fixedly connected between the output end of the fourth cylinder and the second limit bar on the top of the central adjustable punch.

[0024] Through the above technical solution, corresponding to the driving of the fixed die driving and adjusting mechanism, when the third cylinder moves the central adjustable female die, the fourth cylinder also needs to install and pull out the central adjustable punch at the same time.

[0025] Preferably, the mold cooling mechanism is a water pipe cooling mechanism. The water pipe cooling mechanism includes two side threaded sleeves fixedly connected to one side of the moving template mechanism. Built-in connecting pipes are fixedly connected to the two side threaded sleeves inside the side sliding punch.

[0026] Through the above technical solution, the two side threaded sleeves are respectively connected to the water inlet pipe and the water outlet pipe, and the circulating water can be used to quickly cool and shape the product in the mold cavity.

[0027] Preferably, the mold cooling mechanism is a circulating cooling mechanism. The circulating cooling mechanism includes two connecting threaded sleeves fixedly connected to the top and bottom of the movable template mechanism. Circulating pipelines are provided at both the top and bottom of the fixed movable template. A mold built-in cooling layer is jointly arranged among the fixed movable template, the central adjusting punch, and the side sliding punch.

[0028] Through the above technical solution, the connecting threaded sleeves at the top and bottom are respectively connected to the water outlet pipe and the water inlet pipe. The cooling water is conveyed to the mold built-in cooling layer through the circulating pipeline at the bottom of the fixed movable template to complete the cooling of the fixed movable template, the central adjusting punch, and the side sliding punch. Moreover, the distance between the mold built-in cooling layer and the mold cavity is equal, which can achieve the effect of uniform cooling. At the same time, after the central adjusting punch is taken out, the fixed movable template and the side sliding punch are mutually extruded, and a mold built-in cooling layer corresponding to the mold cavity can still be formed. At the same time, before taking out the central adjusting punch, the water supply needs to be stopped and the water inlet pipe needs to be removed to make all the internal water flow out.

[0029] (III) Beneficial effects

[0030] The present invention provides a mold for manufacturing plastic lunch boxes. It has the following beneficial effects:

[0031] 1. For the mold for manufacturing plastic lunch boxes, by designing the adjustable fixed mold mechanism and the adjustable movable mold mechanism, and through the driving and adjustment of the fixed mold driving adjustment mechanism and the movable mold driving adjustment mechanism, the central adjusting female mold and the central adjusting punch can be disassembled and installed, thereby changing the overall size of the mold cavity, and thus changing the size of the formed lunch box product. It avoids the need to disassemble the mold, install the mold, and debug the mold when replacing lunch boxes of different sizes, and improves the production efficiency.

[0032] 2. For the mold for manufacturing plastic lunch boxes, by designing a circulating cooling mechanism, a mold built-in cooling layer is opened inside one side of the punch. And making its shape similar to that of the mold cavity, it can make the distance from the irregular mold cavity to the mold as equal as possible, and through the circulating water flow, the product can be fully cooled, improving the cooling effect and uniformity, and avoiding the phenomenon that the locally softened part still exists in the demolded product.

[0033] 3. The mold for making plastic lunch boxes can change the internal structure of the same lunch box by designing a fixed female mold and a detachable male mold mechanism, and then can be quickly replaced and adjusted to make tableware of different specifications. At the same time, the gaps generated by the splicing of multiple first convex modules and second convex modules can be used for exhausting the raw materials, so there is no need to design exhaust grooves. Brief Description of the Drawings

[0034] Figure 1 Schematic three-dimensional structure diagram of Embodiment 1 of the present invention;

[0035] Figure 2 Schematic cross-sectional structure diagram of Embodiment 1 of the present invention;

[0036] Figure 3 Schematic structure diagram of the present invention;

[0037] Figure 4 Schematic top view structure diagram of Embodiment 1 of the present invention;

[0038] Figure 5 Schematic structure diagram of the adjusting fixed mold mechanism of the present invention;

[0039] Figure 6 Schematic combined structure diagram of the fixed moving template and the side sliding convex mold of the present invention;

[0040] Figure 7 Schematic combined structure diagram of two adjusting plates of the present invention;

[0041] Figure 8 Schematic structure diagram of Embodiment 2 of the present invention;

[0042] Figure 9 Schematic cross-sectional structure diagram of Embodiment 2 of the present invention;

[0043] Figure 10 Schematic structure diagram of Embodiment 3 of the present invention;

[0044] Figure 11 Schematic structure diagram of the detachable male mold mechanism of the present invention;

[0045] Figure 12 Schematic structure diagram of the second convex module of the present invention;

[0046] Figure 13 Schematic structure diagram of the fixed female mold of the present invention.

[0047] Description of the reference numerals:

[0048] 1. First mounting plate; 2. Second mounting plate; 3. Fixed mold plate mechanism; 30. Adjusting fixed mold mechanism; 301. Fixed fixed mold plate; 302. Central adjusting female mold; 303. Side sliding female mold; 304. First limiting strip; 305. First cylinder; 31. Fixed female mold; 4. Fixed strip; 5. Connecting plate; 6. Thimble mechanism; 601. Pusher plate; 602. Adjusting plate; 603. Reset thimble; 7. Moving mold plate mechanism; 70. Adjusting moving mold mechanism; 701. Fixed moving mold plate; 702. Central adjusting male mold; 703. Side sliding male mold; 704. Second limiting strip; 705. Second cylinder; 71. Demounting moving mold mechanism; 711. Fixed frame; 712. First convex module; 713. Second convex module; 8. Fixed mold drive adjusting mechanism; 801. First support frame; 802. Third cylinder; 803. Fixed mold connecting block; 9. Moving mold drive adjusting mechanism; 901. Second support frame; 902. Fourth cylinder; 903. Moving mold connecting block; 10. Mold cooling mechanism; 100. Water pipe cooling mechanism; 1001. Side thread sleeve; 1002. Built-in connecting pipe; 101. Circulating cooling mechanism; 1011. Connecting thread sleeve; 1012. Circulating pipeline; 1013. Mold built-in cooling layer. Specific implementation mode

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Embodiment 1:

[0051] As Figures 1-5As shown in the figure, an embodiment of the present invention provides a mold for manufacturing a plastic lunch box, which includes a first mounting plate 1 and a second mounting plate 2. On the side close to each other, a fixed mold plate mechanism 3 and two fixed bars 4 are respectively fixedly connected to the first mounting plate 1 and the second mounting plate 2. The fixed mold plate mechanism 3 is an adjustable fixed mold mechanism 30. The adjustable fixed mold mechanism 30 includes a fixed fixed mold plate 301 fixedly connected to one side of the first mounting plate 1. A center adjustment female mold 302 and a side sliding female mold 303 are respectively slidably connected to one side of the fixed fixed mold plate 301. First limit bars 304 are fixedly connected to the tops of the center adjustment female mold 302 and the side sliding female mold 303. A first air cylinder 305 is fixedly connected to one side of the adjustable fixed mold mechanism 30. Grooves corresponding to the center adjustment female mold 302 and the side sliding female mold 303 are provided on the fixed fixed mold plate 301, and through holes are provided at the top. The center adjustment female mold 302 and the side sliding female mold 303 can be installed through the through holes, and the side sliding female mold 303 can be pushed by the first air cylinder 305. The two first limit bars 304 can complete the limit of the sliding. By taking out the center adjustment female mold 302 through the fixed mold driving adjustment mechanism 8 and the pushing of the side sliding female mold 303 by the first air cylinder 305, the size of the lunch box can be reduced. Connecting plates 5 are fixedly connected to the sides of the two fixed bars 4 away from the second mounting plate 2;

[0052] As Figures 1-7As shown in the figure, a thimble mechanism 6 is installed between the second mounting plate 2 and the connecting plate 5. The thimble mechanism 6 includes a push plate 601 slidably connected between two fixed bars 4. On one side of the push plate 601, two adjusting plates 602 are slidably connected. On one side of each of the two adjusting plates 602, a reset thimble 603 is fixedly connected. A driving device on the injection molding machine passes through the second mounting plate 2 to push the push plate 601, and then pushes the two adjusting plates 602 so that the multiple reset thimbles 603 eject the product. At the same time, when replacing the central adjusting punch 702, the second cylinder 705 pushes the side sliding punch 703, which will also drive the reset thimble 603 and the corresponding adjusting plate 602 on one side to slide on one side of the connecting plate 5 and the push plate 601 respectively. Therefore, the thimble mechanism 6 can still complete the ejection through the push plate 601. On the side of the connecting plate 5 away from the fixed bar 4, a moving template mechanism 7 is fixedly connected. The moving template mechanism 7 is an adjustable moving die mechanism 70. The adjustable moving die mechanism 70 includes a fixed moving template 701 fixedly connected to one side of the connecting plate 5. On one side of the fixed moving template 701, a central adjusting punch 702 and a side sliding punch 703 are respectively slidably connected. On the top of both the central adjusting punch 702 and the side sliding punch 703, a second limiting strip 704 is fixedly connected. On one side of the fixed moving template 701, a second cylinder 705 is installed. Similarly to the adjustable fixed die mechanism 30, the second cylinder 705 can be used to push the side sliding punch 703, and at the same time, the central adjusting punch 702 can be moved through the moving die driving and adjusting mechanism 9. On the tops of the first mounting plate 1 and the second mounting plate 2, a fixed die driving and adjusting mechanism 8 and a moving die driving and adjusting mechanism 9 are respectively fixedly connected. The fixed die driving and adjusting mechanism 8 includes a first support frame 801 fixedly connected to the top of the first mounting plate 1. A third cylinder 802 is fixedly connected to the first support frame 801. Between the output end of the third cylinder 802 and the first limiting strip 304 on the top of the central adjusting die 302, a fixed die connecting block 803 is fixedly connected. Through the third cylinder 802, the installation and pulling out of the central adjusting die 302 can be completed, and then the size specification of the lunch box can be determined by increasing and decreasing the central adjusting die 302. The moving die driving and adjusting mechanism 9 includes a second support frame 901 fixedly connected to the top of the second mounting plate 2. A fourth cylinder 902 is fixedly connected to the second support frame 901. Between the output end of the fourth cylinder 902 and the second limiting strip 704 on the top of the central adjusting punch 702, a moving die connecting block 903 is fixedly connected. Corresponding to the driving of the fixed die driving and adjusting mechanism 8, when the third cylinder 802 moves the central adjusting die 302, the fourth cylinder 902 also needs to install and pull out the central adjusting punch 702 at the same time. A mold cooling mechanism 10 is installed on the moving template mechanism 7. The mold cooling mechanism 10 is a water pipe cooling mechanism 100. The water pipe cooling mechanism 100 includes two side threaded sleeves 1001 fixedly connected to one side of the moving template mechanism 7. Inside the side sliding punch 703 of the two side threaded sleeves 1001, an internal connecting pipe 1002 is fixedly connected.Connect two side threaded sleeves 1001 to the water inlet pipe and the water outlet pipe respectively. Through the circulating water, rapid cooling and shaping of the product in the mold cavity can be achieved. At the same time, cooling channels are provided in both the fixed moving template 701 and the central adjusting punch 702, and the side sliding punch 703 is provided with through holes corresponding to the built-in connecting pipe 1002, and the built-in connecting pipe 1002 can slide in the through holes. For example, Figure 6 When the side sliding punch 703 is combined with the fixed moving template 701, the built-in connecting pipe 1002 and the through holes inside the fixed moving template 701 and the side sliding punch 703 form a cooling channel.

[0053] Embodiment 2:

[0054] For example Figures 1-13 As shown, the difference between this embodiment and Embodiment 1 is that the fixed template mechanism 3 is a fixed female mold 31, the fixed female mold 31 is an immovable concave surface, the moving template mechanism 7 is a detachable moving mold mechanism 71, and the detachable moving mold mechanism 71 includes a fixed frame 711 fixedly connected to one side of the connecting plate 5. A plurality of first convex blocks 712 and second convex blocks 713 are installed in the fixed frame 711. By disassembling and installing the first convex blocks 712 and the second convex blocks 713 and cooperating with the fixed female mold 31, the change of the area division inside the lunch box can be realized, and then lunch boxes of different models can be manufactured. For example Figure 11 and 12 , lunch boxes with four squares and three squares can be manufactured respectively. At the same time, the gaps generated by the splicing of the plurality of first convex blocks 712 and the second convex blocks 713 can be used for exhausting the air of the extruded raw materials, and thus the exhaust groove does not need to be designed.

[0055] Embodiment 3:

[0056] For example Figures 1-9As shown in the figure, the difference between this embodiment and the first embodiment lies in that the mold cooling mechanism 10 is a circulating cooling mechanism 101. The circulating cooling mechanism 101 includes two connecting threaded sleeves 1011 fixedly connected to the top and bottom of the moving template mechanism 7. Circulating pipelines 1012 are provided at both the top and bottom of the fixed moving template 701. A mold built-in cooling layer 1013 is jointly arranged among the fixed moving template 701, the central adjusting punch 702, and the side sliding punch 703. The connecting threaded sleeves 1011 at the top and bottom are respectively connected to the water outlet pipe and the water inlet pipe. The cooling water is conveyed to the mold built-in cooling layer 1013 through the circulating pipeline 1012 at the bottom of the fixed moving template 701 to complete the cooling of the fixed moving template 701, the central adjusting punch 702, and the side sliding punch 703. Moreover, the distances between the opened mold built-in cooling layer 1013 and the mold cavity are equal, which can achieve the effect of uniform cooling. At the same time, after the central adjusting punch 702 is taken out, the fixed moving template 701 and the side sliding punch 703 are mutually extruded, and a mold built-in cooling layer 1013 corresponding to the mold cavity can still be formed. At the same time, before taking out the central adjusting punch 702, it is necessary to stop the water supply and remove the water inlet pipe to make all the water inside flow out.

[0057] Working principle: Install the mold on the injection molding machine. The raw material is injected into the mold cavity through the first mounting plate 1 to form a product. At the same time, the product is cooled through the mold cooling mechanism 10. After the mold is opened, the driving device on the injection molding machine passes through the second mounting plate 2 to push the push plate 601, and then pushes the two adjusting plates 602 so that multiple reset ejector pins 603 eject the product. The product can be taken out by cooperating with the suction cup of the robotic arm. When dealing with lunch boxes of different sizes, first remove the water inlet pipe, drain the water in the opened cooling pipeline or the mold built-in cooling layer 1013, and then respectively pull out the central adjusting female mold 302 and the central adjusting punch 702 through the fixed mold driving adjustment mechanism 8 and the moving mold driving adjustment mechanism 9. Then, respectively push the side sliding female mold 303 and the side sliding punch 703 through the first cylinder 305 and the second cylinder 705 and squeeze them with the fixed fixed template 301 and the fixed moving template 701 respectively to form a new mold cavity. Thus, molds of different sizes can be made. At the same time, the fixed female mold 31 and the disassembled moving mold mechanism 71 can be used to replace different first convex modules 712 and second convex modules 713 in the fixed frame 711, and thus the specifications inside the lunch box can be adjusted.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for making plastic lunch boxes, comprising a first mounting plate (1) and a second mounting plate (2), characterized in that: The first mounting plate (1) and the second mounting plate (2) are respectively fixedly connected with a fixed mold plate mechanism (3) and two fixing bars (4) on the sides close to each other. The fixed mold plate mechanism (3) is an adjustable fixed mold mechanism (30). The adjustable fixed mold mechanism (30) includes a fixed fixed mold plate (301) fixedly connected to one side of the first mounting plate (1). A central adjustable female mold (302) and a side sliding female mold (303) are respectively slidably connected to one side of the fixed fixed mold plate (301). First limiting bars (304) are fixedly connected to the tops of the central adjustable female mold (302) and the side sliding female mold (303). A first cylinder (305) is fixedly connected to one side of the adjustable fixed mold mechanism (30). The two fixing bars (4) are fixedly connected with a connecting plate (5) on the side far from the second mounting plate (2). A thimble mechanism (6) is installed between the second mounting plate (2) and the connecting plate (5). A moving mold plate mechanism (7) is fixedly connected to the side of the connecting plate (5) far from the fixing bar (4). The moving mold plate mechanism (7) is an adjustable moving mold mechanism (70). The adjustable moving mold mechanism (70) includes a fixed moving mold plate (701) fixedly connected to one side of the connecting plate (5). A central adjustable male mold (702) and a side sliding male mold (703) are respectively slidably connected to one side of the fixed moving mold plate (701). Second limiting bars (704) are fixedly connected to the tops of the central adjustable male mold (702) and the side sliding male mold (703). A second cylinder (705) is installed on one side of the fixed moving mold plate (701). A fixed mold driving and adjusting mechanism (8) and a moving mold driving and adjusting mechanism (9) are respectively fixedly connected to the tops of the first mounting plate (1) and the second mounting plate (2). A mold cooling mechanism (10) is installed on the moving mold plate mechanism (7).

2. The mold for making a plastic lunch box according to claim 1, wherein: The fixed mold plate mechanism (3) is a fixed female mold (31).

3. The mold for making a plastic lunch box according to claim 1, wherein: The thimble mechanism (6) includes a push plate (601) slidably connected between the two fixing bars (4). Two adjusting plates (602) are slidably connected to one side of the push plate (601). Reset thimbles (603) are fixedly connected to one side of the two adjusting plates (602).

4. A mold for manufacturing a plastic lunch box according to claim 1, characterized in that: The moving mold plate mechanism (7) is a detachable moving mold mechanism (71). The detachable moving mold mechanism (71) includes a fixed frame (711) fixedly connected to one side of the connecting plate (5). A plurality of first convex modules (712) and second convex modules (713) are installed in the fixed frame (711).

5. A mold for manufacturing a plastic lunch box according to claim 1, characterized in that: The fixed mold driving and adjusting mechanism (8) includes a first support frame (801) fixedly connected to the top of the first mounting plate (1). A third cylinder (802) is fixedly connected to the first support frame (801). A fixed mold connecting block (803) is fixedly connected between the output end of the third cylinder (802) and the first limiting bar (304) on the top of the central adjustable female mold (302).

6. A mold for manufacturing a plastic lunch box according to claim 1, characterized in that: The moving die driving and adjusting mechanism (9) includes a second support frame (901) fixedly connected to the top of the second mounting plate (2). A fourth cylinder (902) is fixedly connected to the second support frame (901). A moving die connecting block (903) is fixedly connected between the output end of the fourth cylinder (902) and the second limiting strip (704) at the top of the center adjusting punch (702).

7. The mold for manufacturing a plastic lunch box according to claim 1, characterized in that: The mold cooling mechanism (10) is a water pipe cooling mechanism (100). The water pipe cooling mechanism (100) includes two side threaded sleeves (1001) fixedly connected to one side of the moving template mechanism (7). An internal connecting pipe (1002) is fixedly connected inside the side sliding punch (703) of the two side threaded sleeves (1001).

8. A mold for manufacturing a plastic lunch box according to claim 1, characterized in that: The mold cooling mechanism (10) is a circulating cooling mechanism (101). The circulating cooling mechanism (101) includes two connecting threaded sleeves (1011) fixedly connected to the top and bottom of the moving template mechanism (7). Circulating pipelines (1012) are provided at both the top and bottom of the fixed moving template (701). A mold internal cooling layer (1013) is jointly arranged among the fixed moving template (701), the center adjusting punch (702), and the side sliding punch (703).

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