Plastic packaging container forming device for food

Abstract

The invention relates to the technical field of injection molding, and discloses a food plastic packaging container forming device which comprises a workbench, a driving device and an upper mold are installed at the top of the workbench, a lower mold is arranged below the upper mold, the lower mold is embedded into a cavity of the workbench and fixed in a welding mode, and the food plastic packaging container forming device further comprises a demolding mechanism. The demolding mechanism achieves efficient and effective demolding operation in mold jacking, vibration and water cooling modes. The vibration assembly is arranged, specifically, a driving gear drives two driven gears, a rotating rod and a groove rotating rod to rotate in sequence, then a second limiting sliding block promotes a colloid impact rod to reciprocate along a sliding rail and continuously impact a lower mold, high-frequency micro vibration is generated, the vibration can destroy the adsorption state of raw materials, flexible demolding is achieved, product surface damage is reduced, and product quality is improved. And meanwhile, residual chippings of the mold are removed, the cleaning frequency is reduced, the defoaming function is achieved, the product quality is improved, and the mold is particularly suitable for efficient production of thin-wall soft containers.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to a molding apparatus for plastic packaging containers for food. Background Technology

[0002] In the existing production process of food plastic packaging containers, the demolding process has always been a critical and challenging issue. Traditional demolding methods often have many drawbacks. For example, when demolding by directly applying rigid force, it is difficult to accurately control the magnitude of the force, which can easily lead to scratches and indentations on the container surface. This is particularly detrimental to packaging materials with smooth or easily scratched surfaces, seriously affecting the appearance quality and market competitiveness of the product. This problem is even more prominent for the mass production of thin-walled flexible containers, because the thin-walled structure makes the container more susceptible to deformation and damage when subjected to uneven external forces. Therefore, a molding device for food plastic packaging containers is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a plastic packaging container forming apparatus for food, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a molding device for food-grade plastic packaging containers, comprising a workbench that serves as the supporting foundation for the entire device. A driving device and an upper mold are mounted on the top of the workbench, and a lower mold is positioned below the upper mold. The lower mold is embedded within the workbench cavity and fixed by welding. The device also includes a demolding mechanism that achieves efficient and effective demolding through a top mold, vibration, and water cooling. The demolding mechanism includes a driving component and a vibration component. The driving component abuts against the vibration component, and the vibration component is driven by the driving component. The driving component includes an internally threaded sleeve with a driving rod inside. Rubber impact rods are located on the left and right sides of the internally threaded sleeve. Limiting sliders are welded to the inner walls of both rubber impact rods. Grooved rotating rods are located inside both rubber impact rods, and their outer grooves are slidably connected to the outer surfaces of the limiting sliders. Rotating rods are welded to the bottom of both grooved rotating rods, and driven gears are welded to the bottom of the outer surfaces of both rotating rods. A driving gear is welded to the bottom of the outer surface of the driving rod.

[0005] Furthermore, the demolding mechanism also includes a top mold assembly that abuts against the lower mold and uses power to eject the product from the mold; and a water cooling assembly installed outside the worktable that uses water cooling to rapidly cool and demold the product.

[0006] Furthermore, the internally threaded sleeve is disposed inside the worktable cavity, a limiting slider is welded to the outer surface of the drive rod, the outer surface of the limiting slider is slidably connected to the groove on the inner wall of the internally threaded sleeve, the bottom of the drive rod is rotatably connected to the inner wall of the worktable, the outer surface of the drive gear meshes with the outer surfaces of the two driven gears, the bottom of the outer surfaces of the two driven gears is rotatably connected to the bottom of the inner wall of the worktable, the tops of the two rubber impact rods contact the bottom of the lower mold, slide bars are welded to both sides of the outer surfaces of the two rubber impact rods, two slide rails are welded to the left and right sides of the bottom of the lower mold, and the interiors of the four slide rails are slidably connected to the outer surfaces of the slide bars.

[0007] Furthermore, the top mold assembly includes a top plate disposed inside the lower mold cavity. A push rod is welded to the bottom of the top plate, the push rod passing through the lower mold and the worktable and extending into the cavity. A connecting bracket is welded to the side of the push rod away from the top plate. Guide rods are welded to the top four corners of the connecting bracket. The bottom of the connecting bracket is welded to the top of the internal threaded sleeve. The four guide rods pass through the four corners inside the lower mold and are welded to the four corners at the bottom of the upper mold. The outer surfaces of the four guide rods are slidably connected to the four corners inside the lower mold. Cavities are opened in the four corners inside the lower mold. Springs are sleeved on the outer surfaces of the four guide rods. The bottoms of the four springs are connected to the inner walls of the cavities. Limiting rings are connected to the tops of the four springs. The inner walls of the four limiting rings are welded to the outer surfaces of the guide rods.

[0008] Furthermore, the water-cooling assembly includes a water storage tank, which is bolted to the right side of the workbench. A water pump is installed above the water storage tank and connected to the workbench via a mounting bracket. A cooling water pipe is installed at the water pump inlet, and the side of the cooling water pipe away from the water pump is connected to the water outlet of the water storage tank. A water delivery pipe is installed at the water pump outlet. Four atomizing nozzles are installed on the top of the workbench, and the four atomizing nozzles are respectively located at the four outer corners of the lower mold. The four water delivery pipes are connected and connected through the cooling water pipes. A water collection chamber is bolted to the outer wall of the lower mold. A filter plate is installed inside the water collection chamber. A return water pipe is installed at the water collection chamber outlet, and the side of the return water pipe away from the water collection chamber is connected to the water inlet of the water storage tank.

[0009] The present invention has the following beneficial effects: (1) The present invention sets up a vibration component, specifically when the connecting bracket moves down, it drives the internal threaded sleeve to move synchronously. With the help of the internal threaded groove and the limiting slider one, the drive rod rotates around the axis. The active gear drives the two driven gears and the rotating rod and the grooved rotating rod to rotate in sequence. Then, the limiting slider two causes the rubber impact rod to move back and forth along the slide rail, continuously impacting the lower mold and generating high-frequency micro-vibration. This vibration can destroy the adsorption state of the raw material to achieve flexible demolding, reduce product surface damage, remove residual debris from the mold, reduce cleaning frequency, and also has a defoaming function to improve product quality. It is especially suitable for the efficient production of thin-walled soft containers.

[0010] (2) The present invention sets up a water cooling component, specifically by starting a water pump to draw coolant from the water storage tank and delivering it to the atomizing nozzle through a water delivery pipe. The atomizing nozzle sprays water onto the surface of the mold and the molded part after the mold is opened, utilizing the large contact area to quickly absorb heat and cool down, and avoiding water stains or deformation caused by direct rinsing. At the same time, the waste liquid flows into the water collection tank, and after impurities are removed by the filter plate, it returns to the water storage tank through the return water pipe, forming a closed-loop circulation system. This design has the advantages of efficient cooling, friction reduction and product protection, water saving and consumption reduction, which can shorten the molding cycle and improve the demolding quality.

[0011] (3) By setting up a top mold assembly, specifically when the upper mold moves upward, the guide rod is linked to the support and push rod to move synchronously, driving the top plate to accurately lift the product along the process to complete demolding. This mechanism ensures uniform force through mechanical linkage, reduces jamming and mold damage caused by manual demolding, reduces efficiency fluctuations and hygiene hazards caused by manual intervention, and improves the efficiency of continuous production of the device.

[0012] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the workbench of the present invention; Figure 3 This is a schematic diagram of the mold structure of the present invention; Figure 4 This is a schematic diagram of the top plate structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the internal threaded sleeve of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of A in the middle; Figure 7 This is a schematic diagram of the exploded structure of the vibration component of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of B in the diagram; Figure 9 This is a schematic diagram of the water-cooling component structure of the present invention; The attached diagram lists the components represented by each number as follows: In the diagram: 111. Workbench; 112. Drive unit; 113. Upper mold; 114. Lower mold; 2. Demolding mechanism; 21. Top mold assembly; 211. Top plate; 212. Guide rod; 213. Limiting ring; 214. Spring; 215. Push rod; 216. Connecting bracket; 22. Drive assembly; 221. Internal threaded sleeve; 222. Drive rod; 223. Drive gear; 224. Limiting slider 1. Water-cooled assembly; 231. Water storage tank; 232. Water pump; 233. Cooling water pipe; 234. Water delivery pipe; 235. Atomizing nozzle; 236. Water collection chamber; 237. Filter plate; 238. Return water pipe; 24. Vibration assembly; 241. Driven gear; 242. Rotating rod; 243. Grooved rotating rod; 244. Rubber impact rod; 245. Sliding bar; 246. Sliding rail; 247. Limiting slider. Detailed Implementation

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

[0016] Please see Figures 1-9As shown, this invention is a molding device for food plastic packaging containers, including a workbench 111, which serves as the supporting base for the entire device. A drive device 112 and an upper mold 113 are mounted on the top of the workbench 111. A lower mold 114 is positioned below the upper mold 113 and is embedded inside the cavity of the workbench 111 and fixed by welding. The device also includes a demolding mechanism 2, which achieves efficient and effective demolding through a top mold, vibration, and water cooling. The demolding mechanism 2 includes a drive assembly 22 and a vibration assembly 24. The drive assembly 22 and the vibration assembly 24 abut against each other, and the vibration assembly 24 is driven by the drive assembly 22. The drive assembly 22 includes an internally threaded sleeve 221. The device is equipped with a drive rod 222. Rubber impact rods 244 are located on the left and right sides of the internal threaded sleeve 221. Limiting sliders 247 are welded to the inner walls of both rubber impact rods 244. Grooved rotating rods 243 are located inside each of the two rubber impact rods 244. The grooves on the outer walls of the two grooved rotating rods 243 are slidably connected to the outer surfaces of the limiting sliders 247. Rotating rods 242 are welded to the bottom of each of the two grooved rotating rods 243. Driven gears 241 are welded to the bottom of the outer surfaces of each of the two rotating rods 242. A drive gear 223 is welded to the bottom of the outer surface of the drive rod 222. The demolding mechanism 2 also includes a top mold assembly 21, which abuts against the lower mold 114. The top mold assembly 21 ejects and demolds the product via power. A water cooling assembly 23 is also included. 23 is installed outside the workbench 111. The water-cooling component 23 rapidly cools and demolds the product using water cooling. The internal threaded sleeve 221 is set inside the cavity of the workbench 111. The outer surface of the drive rod 222 is welded with a limit slider 224. The outer surface of the limit slider 224 is slidably connected to the groove on the inner wall of the internal threaded sleeve 221. The bottom of the drive rod 222 is rotatably connected to the inner wall of the workbench 111. The outer surface of the drive gear 223 meshes with the outer surfaces of two driven gears 241. The bottom of the outer surfaces of the two driven gears 241 is rotatably connected to the bottom of the inner wall of the workbench 111. The tops of the two rubber impact rods 244 contact the bottom of the lower mold 114. Sliding strips 245 are welded to both sides of the outer surfaces of the two rubber impact rods 244. Two slide rails 246 are welded to the left and right sides of the bottom of mold 114. The interior of all four slide rails 246 is slidably connected to the outer surface of the slide bar 245. When the connecting bracket 216 moves down, it drives the internal threaded sleeve 221 to move synchronously. Through the internal threaded groove and the limiting slider 224, the drive rod 222 rotates around the axis. The drive gear 223 drives the two driven gears 241, the rotating rod 242, and the grooved rotating rod 243 to rotate in sequence. Then, through the limiting slider 247, the rubber impact rod 244 is caused to reciprocate along the slide rails 246, continuously impacting the lower mold 114 and generating high-frequency micro-vibration. This vibration can break the adsorption state of the raw material to achieve flexible demolding, reduce product surface damage, remove residual debris from the mold, reduce cleaning frequency, and also has a defoaming function to improve product quality.It is particularly well-suited for the efficient production of thin-walled, flexible containers.

[0017] The top mold assembly 21 includes a top plate 211, which is disposed inside the cavity of the lower mold 114. A push rod 215 is welded to the bottom of the top plate 211. The push rod 215 passes through the lower mold 114 and the worktable 111 and extends into the cavity. A connecting bracket 216 is welded to the side of the push rod 215 away from the top plate 211. Guide rods 212 are welded to the four corners of the top of the connecting bracket 216. The bottom of the connecting bracket 216 is welded to the top of the internal threaded sleeve 221. The four guide rods 212 pass through the four corners of the lower mold 114 and are welded to the four corners of the bottom of the upper mold 113. The outer surfaces of the four guide rods 212 are slidably connected to the four corners of the lower mold 114. The upper mold 113 has cavities at each of its four corners. Springs 214 are fitted on the outer surfaces of the four guide rods 212. The bottom of each spring 214 is connected to the inner wall of the cavity, and the top of each spring 214 is connected to a limit ring 213. The inner walls of the four limit rings 213 are welded to the outer surfaces of the guide rods 212. When the upper mold 113 moves upward, the guide rods 212 are linked to the support 216 and the push rod 215 to move synchronously, driving the top plate 211 to precisely lift the product along the process to complete demolding. This mechanism ensures uniform force through mechanical linkage, reduces jamming and mold damage caused by manual demolding, reduces efficiency fluctuations and hygiene hazards caused by manual intervention, and improves the efficiency of continuous production of the device.

[0018] The water-cooling assembly 23 includes a water storage tank 231, which is bolted to the right side of the workbench 111. A water pump 232 is mounted above the water storage tank 231 and connected to the workbench 111 via a mounting bracket. A cooling water pipe 233 is installed at the inlet of the water pump 232, and the side of the cooling water pipe 233 away from the water pump 232 is connected to the outlet of the water storage tank 231. A water delivery pipe 234 is installed at the outlet of the water pump 232. Four atomizing nozzles 235 are mounted on the top of the workbench 111 and are respectively located at the four corners of the lower mold 114. The four water delivery pipes 234 are connected and connected through the cooling water pipes 233. A water collection chamber 236 is bolted to the outer wall of the lower mold 114. The cavity is equipped with a filter plate 237, and the outlet of the water collection chamber 236 is equipped with a return water pipe 238. The side of the return water pipe 238 away from the water collection chamber 236 is connected to the inlet of the water storage tank 231. The water pump 232 is started to draw the coolant from the water storage tank 231 and deliver it to the atomizing nozzle 235 through the water delivery pipe 234. The atomizing nozzle 235 sprays water atomized onto the surface of the mold and the molded part after the mold is opened. It uses the large contact area to quickly absorb heat and cool down, and avoids water stains or deformation caused by direct rinsing. At the same time, the waste liquid flows into the water collection chamber 236, and after impurities are removed by the filter plate 237, it returns to the water storage tank 231 through the return water pipe 238, forming a closed-loop circulation system. This design has the advantages of efficient cooling, friction reduction and product protection, water saving and consumption reduction, which can shorten the molding cycle and improve the demolding quality.

[0019] The core of the device consists of a worktable 111, a drive unit 112, an upper mold 113, and a lower mold 114. The upper mold 113 and lower mold 114 correspond and match, forming a cavity that conforms to the shape of a plastic packaging container after mold closing. The worktable 111 provides support for the overall structure. The drive unit 112, such as a hydraulic or electric drive assembly, provides the power source for mold closing and opening. In use, when the drive unit 112 drives the upper mold 113 to move downward and close with the lower mold 114, an injection port is installed on the top of the upper mold 113. An external injection molding system injects molten food-grade plastic raw material into the mold cavity through the injection port. After the plastic is completely filled in the cavity, it undergoes a holding pressure stage to ensure the cavity is filled, and then enters a cooling and solidification stage. After solidification into the container shape, the drive device 112 drives the upper mold 113 to open upwards, completing the basic process of single molding. Simultaneously, as the drive device 112 drives the upper mold 113 downwards, the upper mold 113 synchronously drives the guide rods 212. At this time, the guide rods 212 slide within the four corners of the lower mold 114. Simultaneously, the guide rods 212 compress the spring 214 through the limiting ring 213, causing the spring 214 to contract and store energy. During the movement of the guide rods 212, the top plate 211 moves synchronously through the connecting bracket 216 and the push rod 215. The four guide rods 212 provide a certain degree of stability for the movement of the upper mold 113. Meanwhile, under the connecting bracket 216... During the movement, the internal threaded sleeve 221 moves synchronously. As the internal threaded sleeve 221 moves downwards, it drives the drive rod 222 to rotate around its own axis through its internal thread groove and the limiting slider 224. During the rotation of the drive rod 222, it drives the two driven gears 241 to rotate via the drive gear 223. The rotation of the two driven gears 241 drives the two rotating rods 242 to rotate synchronously. The rotation of the rotating rods 242 synchronously drives the grooved rotating rod 243 to rotate. During the rotation of the grooved rotating rod 243, it drives the rubber impact rod 244 to move through the limiting slider 247. The rubber impact rod 244 is then limited by the slide rail 246 and the limiting slider 247. The action of the impact rod 244 involves a reciprocating up-and-down motion. During its movement, the impact rod continuously strikes the bottom of the lower mold 114, converting the force of this impact into high-frequency, slight vibrations that are transmitted to the molten plastic inside the cavity. Simultaneously, as the drive device 112 lifts the upper mold 113, the impact rod 244 continues to strike the upper mold 113, causing it to vibrate. This vibration, through high-frequency, minute displacement, disrupts the adsorption or adhesion of the raw material, allowing the container to separate from the mold without forced demolding. This reduces the risk of scratches or indentations on the container surface caused by improper thrust control during demolding of the top plate 211, making it particularly suitable for packaging materials with smooth or easily scratched surfaces. Furthermore, vibration demolding separates the materials through inertial force.Without applying rigid force directly to the container, demolding can be completed while protecting the container's shape. This is especially suitable for the mass production of thin-walled, flexible containers. Furthermore, during vibration, any small amount of plastic debris that may remain on the mold surface will be dislodged, reducing impurities that could lead to defects in subsequent container molding. This indirectly reduces the frequency of manual mold cleaning, ensuring production continuity. Additionally, vibration can defoam the raw materials to some extent, improving product quality. Simultaneously, during the mold opening process, the water pump 232 is activated to extract coolant from the water storage tank 231 through the cooling water pipe 233. The synchronous water pump 232 then delivers the coolant to each atomizing nozzle 235 through the water delivery pipe 234. The atomizing nozzles 235 face the molded container or mold surface after mold opening, atomizing and spraying out a portion of the cooling water. The atomized water droplets have a large contact area with the air, absorbing a large amount of heat during evaporation, further accelerating the cooling of the mold and the molded part. This also avoids direct water spraying causing water stains or deformation on the surface of the molded part. The liquid produced after cooling... The water will fall into the water collection chamber 236, which is equipped with a filter plate 237. The filter plate 237 filters out impurities such as plastic debris and dust that may be mixed in the cooling water, reducing the possibility of impurities clogging the device. The filtered cooling water flows back to the water storage tank 231 through the return water pipe 238, realizing the recycling of water resources, reducing energy consumption and costs. By combining water cooling with demolding, the cooling time of the molded product is significantly reduced, improving production efficiency. Secondly, by water cooling the mold and the product, the friction between the product and the mold can be reduced, indirectly reducing the damage to the container during demolding. Simultaneously, during the upward movement of the upper mold 113, the connecting bracket 216 and the push rod 215 will move synchronously through the guide rod 212. At this time, the top plate 211 will also move together. During the movement of the top plate 211, it will come into contact with the product and simultaneously remove the product from the top inside the mold cavity, thus achieving the demolding effect. This reduces the situation where the container gets stuck in the mold due to uneven force when demolding by relying solely on manual or other methods, or where forcibly removing it damages the mold texture. It reduces manual intervention, adapts to automated production lines, reduces efficiency fluctuations and hygiene risks caused by manual operation, and further improves production efficiency.

[0020] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A food plastic packaging container forming apparatus, comprising a workbench (111), the workbench (111) serving as the supporting base for the entire apparatus, a driving device (112) and an upper mold (113) mounted on the top of the workbench (111), a lower mold (114) disposed below the upper mold (113), the lower mold (114) being embedded inside the cavity of the workbench (111) and fixed by welding, characterized in that, Also includes: Demolding mechanism (2), which achieves efficient and effective demolding operation through top mold, vibration and water cooling; The demolding mechanism (2) includes a drive assembly (22) and a vibration assembly (24). The drive assembly (22) abuts against the vibration assembly (24), and the vibration assembly (24) is driven by the drive assembly (22). The drive assembly (22) includes an internally threaded sleeve (221), and a drive rod (222) is provided inside the internally threaded sleeve (221). Rubber impact rods (244) are provided on the left and right sides of the internally threaded sleeve (221). The two rubber impact rods (244) are... 44) Limiting sliders (247) are welded to the inner walls of both of the two rubber impact rods (244). Grooved rotating rods (243) are provided inside the two grooved rotating rods (243). The grooves on the outer walls of the two grooved rotating rods (243) are slidably connected to the outer surface of the limiting sliders (247). Rotating rods (242) are welded to the bottom of the two grooved rotating rods (243). Driven gears (241) are welded to the bottom of the outer surface of the two rotating rods (242). Driven gears (223) are welded to the bottom of the outer surface of the driving rod (222).

2. The food plastic packaging container forming device according to claim 1, characterized in that: The demolding mechanism (2) further includes: The top mold assembly (21) abuts against the lower mold (114), and the top mold assembly (21) ejects and demolds the product by power. Water cooling component (23) is installed outside the workbench (111). The water cooling component (23) cools and demolds the product quickly by means of water cooling.

3. The food plastic packaging container forming apparatus according to claim 1, characterized in that: The internal threaded sleeve (221) is set inside the cavity of the worktable (111). The outer surface of the drive rod (222) is welded with a limiting slider (224). The outer surface of the limiting slider (224) is slidably connected to the groove of the inner wall of the internal threaded sleeve (221). The bottom of the drive rod (222) is rotatably connected to the inner wall of the worktable (111). The outer surface of the drive gear (223) is meshed with the outer surfaces of the two driven gears (241).

4. The food plastic packaging container forming apparatus according to claim 1, characterized in that: The bottom of the outer surface of the two driven gears (241) is rotatably connected to the bottom of the inner wall of the worktable (111), the top of the two rubber impact rods (244) is in contact with the bottom of the lower mold (114), and slide bars (245) are welded to both sides of the outer surface of the two rubber impact rods (244). Two slide rails (246) are welded to the left and right sides of the bottom of the lower mold (114), and the interior of the four slide rails (246) is slidably connected to the outer surface of the slide bars (245).

5. The food plastic packaging container forming apparatus according to claim 2, characterized in that: The top mold assembly (21) includes a top plate (211), which is disposed inside the cavity of the lower mold (114). A push rod (215) is welded to the bottom of the top plate (211). The push rod (215) passes through the lower mold (114) and the worktable (111) and extends into the cavity. A connecting bracket (216) is welded to the side of the push rod (215) away from the top plate (211). Guide rods (212) are welded to the four corners of the top of the connecting bracket (216). The bottom of the connecting bracket (216) is welded to the top of the internal threaded sleeve (221).

6. The food plastic packaging container forming apparatus according to claim 5, characterized in that: The four guide rods (212) pass through the four corners of the lower mold (114) and are welded to the four corners of the bottom of the upper mold (113). The outer surfaces of the four guide rods (212) are slidably connected to the four corners of the lower mold (114). The four corners of the lower mold (114) are all provided with cavities.

7. The food plastic packaging container forming apparatus according to claim 6, characterized in that: Springs (214) are fitted on the outer surfaces of the four guide rods (212). The bottom of each of the four springs (214) is connected to the inner wall of the cavity. Limiting rings (213) are connected to the top of each of the four springs (214). The inner walls of each of the four limiting rings (213) are welded to the outer surface of the guide rods (212).

8. The food plastic packaging container forming apparatus according to claim 2, characterized in that: The water-cooling assembly (23) includes a water storage tank (231), which is bolted to the right side of the workbench (111). A water pump (232) is installed above the water storage tank (231). The water pump (232) is connected to the workbench (111) via a mounting bracket. A cooling water pipe (233) is installed at the water inlet of the water pump (232). The side of the cooling water pipe (233) away from the water pump (232) is connected to the water outlet of the water storage tank (231). A water delivery pipe (234) is installed at the water outlet of the water pump (232).

9. The food plastic packaging container forming apparatus according to claim 8, characterized in that: The workbench (111) is equipped with four atomizing nozzles (235) on its top. The four atomizing nozzles (235) are respectively located on the outer ring of the four corners of the lower mold (114). The four water supply pipes (234) are connected and connected through cooling water pipes (233). A water collection chamber (236) is installed on the outer wall of the lower mold (114) by bolts. A filter plate (237) is installed in the inner cavity of the water collection chamber (236). A return water pipe (238) is installed at the water outlet of the water collection chamber (236). The side of the return water pipe (238) away from the water collection chamber (236) is connected to the water inlet of the water storage tank (231).

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