Plastic lunch box forming device

Abstract

The present invention relates to a technical field of plastic lunch boxes, and in particular to a plastic lunch box forming device. The present invention includes a support plate and a slide bar. Four slide bars are fixedly connected to a rectangular array on the top of the support plate, and the outer walls of the four slide bars are slidably connected to a lifting plate. A sealed space is formed by the cooperation of a lower mold shell, an upper mold shell and a baffle, and the gas pushes the moving block through a hose, so that the gas enters the gas collecting box through a first transmission pipe. The gas collecting box can collect and store the gas, and through the heat exchange of the vortex tube, the cold air flow can flow into the third transmission pipe through the second transmission pipe, so that the third transmission pipe cools the plastic melt in the gap between the mold and the injection groove, and finally forms a plastic lunch box, avoiding cumbersome operation steps, accelerating the curing speed of the plastic lunch box, and improving the efficiency of plastic lunch box forming.

Description

Technical Field

[0001] The invention relates to the technical field of plastic lunch boxes, and in particular to a plastic lunch box forming device. Background Art

[0002] Injection molding is a common plastic processing technology. It injects molten plastic into a mold. After the plastic melt is cooled and formed, it can obtain a product of the desired shape to meet people's needs. Especially in the catering industry, plastic lunch boxes are very common in our lives and are an indispensable part of take-out meals.

[0003] The existing technology for processing plastic lunch boxes is mainly injection molding technology. The technical process includes multiple processing steps such as raw material preparation, melt plasticization, injection into molds, cooling and fixation, demolding and post-processing. This makes the processing of plastic lunch boxes more complicated, and the time waiting for the plastic to cool is long. Subsequently, the cooled lunch boxes need to be manually demolded and the scraps need to be processed, which significantly reduces the production efficiency of plastic lunch boxes. Summary of the invention

[0004] The invention provides a plastic lunch box forming device, which overcomes the shortcomings of complicated injection molding process, low integration degree and low efficiency.

[0005] The technical solution is: a plastic lunch box forming device, including a support plate and a sliding rod. Four sliding rods are fixedly connected to the top of the support plate in a rectangular array. The outer walls of the four sliding rods are slidably connected to a lifting plate. A first fixed plate is fixedly connected to one side of the lifting plate. A driving motor is installed at the bottom of the support plate. The output end of the driving motor is fixedly connected to one end of a threaded rod. The outer wall of the threaded rod is threadedly connected to the first fixed plate. The other end of the threaded rod is rotatably connected to a second fixed plate. An upper mold shell is fixedly connected to one side of the second fixed plate. The outer walls of the four sliding rods are through-fixed to the upper mold shell. The outer walls of the four sliding rods are slidably connected to the lower mold shell. A first spring is connected to a rectangular array between the lifting plate and the lower mold shell. The first spring is used to play a buffering role. The first spring is sleeved on the outer wall of the sliding rod. A baffle plate is fixedly connected to the outside of the upper mold shell. The baffle plate is used to prevent air from flowing out from between the baffle plate and the lower mold shell when the lower mold shell moves upward. A molding mechanism for cooling the plastic lunch box is provided on the top of the upper mold shell.

[0006] The molding mechanism includes a hose, and air inlets are symmetrically provided at the bottom of the upper mold shell. One end of the two air inlets is connected to a hose, which is made of high-temperature resistant material. One end of the hose is connected to an air intake hollow tube, which is made of high-temperature resistant material. A fixing ring is fixed inside the air intake hollow tube, and a moving block is slidably connected inside the air intake hollow tube. The moving block and the air intake hollow tube are sealed and slidable. A second spring is connected between the fixing ring and the moving block. The outer wall of the air intake hollow tube is connected to a first transmission tube, and one end of the first transmission tube is connected to an air collecting box. The inside of the air collecting box A slide plate is slidably connected, a third spring is connected between the slide plate and the air collecting box, a support rod is fixedly connected to a rectangular array at the bottom of the air collecting box, the support rod is used to provide support for the air collecting box, the support rod is fixedly connected to the upper mold shell, a hollow ring is fixedly connected to one end of the hollow air intake tube, a vortex tube is fixedly connected inside the hollow ring, a baffle column is fixedly connected to one end of the vortex tube, one end of the vortex tube close to the baffle column is a hot air outlet, the other end of the vortex tube is a cold air outlet, and the cold air outlet of the vortex tube is connected to a second transmission tube, and swirl holes inclined toward the hot air outlet are distributed circumferentially on the outer side of the vortex tube.

[0007] The molding mechanism further includes a third transmission tube connected to the interior of the lower mold shell. The third transmission tube can be connected to the second transmission tube when movable. Two injection grooves are provided inside the lower mold shell.

[0008] Among them, the molding mechanism also includes a lower pressure plate, and a second guide groove is symmetrically opened on the top of the lower mold shell, wherein the lower pressure plate is slidably connected in one of the second guide grooves, and a fourth spring is connected between the bottom end of the lower pressure plate and the second guide groove. The first guide groove is through-opened on the outer wall of the lower pressure plate, and the first guide groove is composed of a vertical groove and an inclined groove. A scraper is slidably connected in the first guide groove, and one side of the scraper is slidably connected to the other second guide groove.

[0009] It also includes two groups of first inclined blocks symmetrically fixed to the top of the lower mold shell, each group of first inclined blocks has two, and a rectangular groove is symmetrically opened on the bottom of the upper mold shell, in which a second inclined block is slidably connected, and when the first inclined block moves, the inclined surface can contact the inclined surface of the second inclined block, and a special-shaped block is slidably connected in the rectangular groove, and a fifth spring is connected between the special-shaped block and the upper mold shell.

[0010] It also includes a magnetic top column symmetrically fixed to the top of the support plate, two magnetic top columns are slidably connected to the lifting plate, circular through grooves are symmetrically opened on the bottom of the lower mold shell, two magnetic top columns are located in the two circular through grooves, and the tops of the two magnetic top columns are magnetically connected to circular magnetic blocks that are compatible with the circular through grooves, and the circular magnetic blocks are consistent with the circular through grooves.

[0011] It also includes a vertical plate fixedly connected to the top of the support plate, a rebound assembly is provided on one side of the vertical plate, a first transmission shaft is fixedly connected to one side of the first fixed plate, one end of the first transmission shaft is rotatably connected to a gear, a torsion spring is connected between the gear and the first transmission shaft, the gear is connected to the rebound assembly, and a second transmission shaft is fixedly connected to one side of the gear.

[0012] It also includes an air extraction shell eccentrically rotatably connected to the outer wall of the second transmission shaft. An eccentric wheel is fixedly connected to the outer wall of the second transmission shaft. The eccentric wheel is located inside the air extraction shell and is rotatably connected to the inner wall of the air extraction shell.

[0013] Among them, it also includes a sealing plate. The eccentric wheel is provided with three square through grooves distributed in the circumference. The sealing plate is slidably connected in the square through groove. The surface of the sealing plate is quenched and hardened and coated with a protective coating. A sixth spring is connected between the sealing plate and the square through groove of the eccentric wheel. Three cavities are provided in the vacuum shell, which are all composed of the vacuum shell, the eccentric wheel and two adjacent sealing plates. The outer wall of the vacuum shell is connected to the fourth transmission pipe and the air outlet. The fourth transmission pipe is made of flexible material. One end of the fourth transmission pipe is fixedly connected to the top of the upper mold shell. Flow ports are symmetrically provided at the bottom of the upper mold shell, and one end of the two flow ports are connected to the fourth transmission pipe.

[0014] Among them, it also includes a material barrel, a material barrel is installed on the top of the upper mold shell, a plurality of discharge ports are opened at the bottom of the upper mold shell, and the plurality of discharge ports are connected with the material barrel, a mold is symmetrically fixed to the bottom of the upper mold shell, two flow ports and two air inlets correspond to the mold, and a high temperature resistant sealing strip is connected between the baffle and the upper mold shell.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention provides a plastic lunch box forming device, which forms a sealed space through the cooperation of a lower mold shell, an upper mold shell and a baffle, and allows gas to push a moving block through a hose, so that the gas enters a gas collecting box through a first transmission pipe, and the gas collecting box can collect and store the gas, and through the heat exchange of a vortex tube, a cold air flow can flow into a third transmission pipe through a second transmission pipe, so that the third transmission pipe cools the plastic melt in the gap between the mold and the injection groove, and finally forms a plastic lunch box, avoiding cumbersome operation steps, accelerating the curing speed of the plastic lunch box, and improving the efficiency of plastic lunch box forming;

[0017] 2. The present invention provides a plastic lunch box forming device. Through the coordinated use of a first inclined block, a second inclined block and a special-shaped block, when the lower mold shell moves away from the upper mold shell, the special-shaped block moves downward to push the formed plastic lunch box to prevent the plastic lunch box from adhering to the mold, thereby avoiding the plastic blocking the feed port during the next injection molding, reducing the manual operation steps in the production of plastic lunch boxes, and improving the production efficiency of plastic lunch boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of the present invention;

[0019] Figure 2 A schematic diagram of the upper mold shell structure of the present invention;

[0020] Figure 3 A schematic diagram of the air inlet structure of the present invention;

[0021] Figure 4 A cross-sectional view of the gas collecting box structure of the present invention;

[0022] Figure 5 A schematic diagram of the hose structure of the present invention;

[0023] Figure 6 A cross-sectional view of the lower mold shell structure of the present invention;

[0024] Figure 7 A schematic diagram of the circular magnetic block structure of the present invention;

[0025] Figure 8 A schematic diagram of the special-shaped block structure of the present invention;

[0026] Fig. 9 A schematic diagram of the structure of the fourth transmission tube of the present invention;

[0027] Fig.10 A schematic diagram of the gear structure of the present invention;

[0028] Fig.11 A cross-sectional view of the exhaust shell structure of the present invention.

[0029] Markings in the accompanying drawings: 1-support plate, 101-sliding rod, 102-driving motor, 103-first fixed plate, 104-threaded rod, 105-second fixed plate, 106-lifting plate, 2-lower mold shell, 201-upper mold shell, 202-air inlet, 203-hose, 204-air inlet hollow pipe, 205-fixing ring, 206-moving block, 207-first transmission pipe, 208-air collecting box, 209-sliding plate, 210-hollow ring, 211-vortex tube, 212-second transmission pipe, 213-third transmission pipe, 3-lower pressure plate, 3 01-first guide groove, 302-scraper, 303-second guide groove, 304-baffle, 4-magnetic top column, 401-circular magnetic block, 5-first inclined block, 501-second inclined block, 502-special-shaped block, 6-mold, 601-injection groove, 7-barrel, 701-discharge port, 8-vertical plate, 801-rebound assembly, 802-first transmission shaft, 803-gear, 804-vacuum shell, 805-eccentric wheel, 806-sealing plate, 807-fourth transmission pipe, 808-second transmission shaft, 809-air outlet, 810-flow port. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1-Figure 11 As shown, a plastic lunch box forming device includes a support plate 1 and a slide bar 101. Four slide bars 101 are fixedly connected to the top of the support plate 1 in a rectangular array. The outer walls of the four slide bars 101 are slidably connected to a lifting plate 106. A first fixed plate 103 is fixedly connected to one side of the lifting plate 106. A driving motor 102 is installed at the bottom of the support plate 1. The output end of the driving motor 102 passes through the support plate 1 and is fixedly connected to one end of a threaded rod 104. The outer wall of the threaded rod 104 is threadedly connected to the first fixed plate 103. The other end of the threaded rod 104 is rotatably connected to a second fixed plate 105. One side of the second fixed plate 105 An upper mold shell 201 is fixedly connected, and the outer walls of four slide bars 101 are fixedly connected to the upper mold shell 201 in a through-type manner. The outer walls of the four slide bars 101 are slidably connected to the lower mold shell 2 together. A first spring is connected in a rectangular array between the lifting plate 106 and the lower mold shell 2. The first spring is used to play a buffering role. The first spring is sleeved on the outer wall of the slide bar 101. A baffle plate 304 is fixedly connected to the outer side of the upper mold shell 201. The baffle plate 304 is used to prevent the air flow from flowing out from between the baffle plate 304 and the lower mold shell 2 when the lower mold shell 2 moves upward. A molding mechanism for cooling the plastic lunch box is provided on the top of the upper mold shell 201.

[0032] The molding mechanism includes a hose 203, and air inlets 202 are symmetrically provided at the bottom of the upper mold shell 201. One end of the two air inlets 202 is connected to a hose 203. The hose 203 is made of high temperature resistant material. One end of the hose 203 is connected to an air inlet hollow tube 204. The air inlet hollow tube 204 is made of high temperature resistant material. A fixing ring 205 is fixed inside the air inlet hollow tube 204. A moving block 206 is slidably connected inside the air inlet hollow tube 204. The moving block 206 and the air inlet hollow tube 204 are sealed and slidable. A second spring is connected between the fixing ring 205 and the moving block 206. The outer wall of the air inlet hollow tube 204 is connected to a first transmission tube 207. One end of the first transmission tube 207 is connected to a gas collecting box 208. The gas collecting box 208 is used to store gas. A slide plate 209 is slidably connected to the inside of the air collecting box 208, and a third spring is connected between the slide plate 209 and the air collecting box 208, and the third spring is used to drive the slide plate 209 to reset. A support rod is fixedly connected to a rectangular array at the bottom of the air collecting box 208, and the support rod is used to provide support for the air collecting box 208. The support rod is fixedly connected to the upper mold shell 201, and a hollow ring 210 is fixedly connected to one end of the hollow air inlet tube 204 in a through-type manner. A vortex tube 211 is fixedly connected to the inside of the hollow ring 210, and a baffle column is fixedly connected to one end of the vortex tube 211. The end of the vortex tube 211 close to the baffle column is a hot air outlet, and the other end of the vortex tube 211 is a cold air outlet, and the cold air outlet of the vortex tube 211 is connected to a second transmission tube 212, and swirl holes inclined toward the hot air outlet are distributed circumferentially on the outer side of the vortex tube 211.

[0033] The molding mechanism also includes a third transmission tube 213 connected to the lower mold shell 2. The third transmission tube 213 is made of high temperature resistant material and can be connected to the second transmission tube 212 when movable. Two injection grooves 601 are opened inside the lower mold shell 2.

[0034] The forming mechanism also includes a lower pressure plate 3, and a second guide groove 303 is symmetrically opened on the top of the lower mold shell 2, wherein the lower pressure plate 3 is slidably connected in one of the second guide grooves 303, and the top of the lower pressure plate 3 can contact the bottom of the upper mold shell 201 when it moves, and a fourth spring is connected between the bottom end of the lower pressure plate 3 and the second guide groove 303, and a first guide groove 301 is opened through the outer wall of the lower pressure plate 3, and the first guide groove 301 consists of a vertical groove and an inclined groove, and the inclined groove is located at a high end and is connected to the vertical groove, and the horizontal length of the inclined groove is the same as that of the second guide groove 303, and a scraper 302 is slidably connected in the first guide groove 301, and the first guide groove 301 is used to provide movement of the scraper 302, and the scraper 302 is used to scrape off scraps on the plane of the plastic lunch box, and one side of the scraper 302 is slidably connected to the other second guide groove 303.

[0035] It also includes two groups of first inclined blocks 5 symmetrically fixed to the top of the lower mold shell 2, each group of first inclined blocks 5 has two, and a rectangular groove is symmetrically opened at the bottom of the upper mold shell 201, in which a second inclined block 501 is slidably connected, and when the first inclined block 5 moves, the inclined surface can contact the inclined surface of the second inclined block 501, and a special-shaped block 502 is slidably connected in the rectangular groove, and the special-shaped block 502 is used to push the molded plastic lunch box, and a fifth spring is connected between the special-shaped block 502 and the upper mold shell 201, and when the special-shaped block 502 moves, the inclined surface can contact the inclined surface of the second inclined block 501.

[0036] It also includes a magnetic top column 4 symmetrically fixed to the top of the support plate 1, the two magnetic top columns 4 are slidably connected to the lifting plate 106, and a circular through groove is symmetrically opened at the bottom of the lower mold shell 2. The two magnetic top columns 4 are located in the two circular through grooves. The tops of the two magnetic top columns 4 are magnetically connected to circular magnetic blocks 401 that are compatible with the circular through grooves. The circular magnetic blocks 401 can be engaged with the circular through grooves when they are movable. The circular magnetic blocks 401 are consistent with the circular through grooves, and the plastic melt will not flow out of the circular through grooves.

[0037] It also includes a vertical plate 8 fixedly connected to the top of the support plate 1, and a rebound component 801 is provided on one side of the vertical plate 8. The rebound component 801 is composed of a tooth block, a tension spring and a rack. A first transmission shaft 802 is fixedly connected to one side of the first fixed plate 103, and a gear 803 is rotatably connected to one end of the first transmission shaft 802. A torsion spring is connected between the gear 803 and the first transmission shaft 802, and the gear 803 is meshed with the rack of the rebound component 801. A second transmission shaft 808 is fixedly connected to one side of the gear 803.

[0038] It also includes an air extraction shell 804 eccentrically rotatably connected to the outer wall of the second transmission shaft 808 , an eccentric wheel 805 is fixedly connected to the outer wall of the second transmission shaft 808 , and the eccentric wheel 805 is located inside the air extraction shell 804 , and the eccentric wheel 805 is rotatably connected to the inner wall of the air extraction shell 804 .

[0039] It also includes a sealing plate 806. The eccentric wheel 805 is circumferentially provided with three square through grooves, in which the sealing plate 806 is slidably connected. The surface of the sealing plate 806 is quenched and hardened and coated with a protective coating. The sealing plate 806 and the vacuum shell 804 are always in a tightly fitted state. A sixth spring is connected between the sealing plate 806 and the square through groove of the eccentric wheel 805. Three cavities are provided in the vacuum shell 804, which are all composed of the vacuum shell 804, the eccentric wheel 805 and two adjacent sealing plates 806. The outer wall of the vacuum shell 804 is connected to the fourth transmission pipe 807 and the air outlet 809. The fourth transmission pipe 807 is made of flexible material. One end of the fourth transmission pipe 807 is fixed to the top of the upper mold shell 201. The bottom of the upper mold shell 201 is symmetrically provided with flow ports 810, and one end of the two flow ports 810 are connected to the fourth transmission pipe 807.

[0040] It also includes a material barrel 7, which is installed on the top of the upper mold shell 201. The amount of plastic melt in the material barrel 7 is manually matched in advance. Four discharge ports 701 are opened at the bottom of the upper mold shell 201. Before the material barrel 7 is started, the discharge ports 701 are in a closed state. The four discharge ports 701 are all connected to the material barrel 7. The mold 6 is symmetrically fixed to the bottom of the upper mold shell 201. The injection groove 601 cooperates with the mold 6 when it is active. The plastic melt discharged from the discharge port 701 will be located between the mold 6 and the injection groove 601.

[0041] The two flow ports 810 and the two air inlets 202 correspond to the mold 6 , and a high temperature resistant sealing strip is connected between the baffle plate 304 and the upper mold shell 201 .

[0042] When the plastic lunch box needs to be formed, the drive motor 102 is manually started, the output shaft of the drive motor 102 rotates and drives the threaded rod 104 to rotate together, the threaded rod 104 threadedly drives the first fixed plate 103 to move upward, and drives the lifting plate 106 to move upward along the slide rod 101. When the first fixed plate 103 moves upward, the first transmission shaft 802 drives the gear 803 to move upward, and the gear 803 drives the exhaust shell 804 and the eccentric wheel 805 to move upward synchronously through the second transmission shaft 808. When the gear 803 moves upward, it is affected by the rack of the rebound component 801 and then rotates. At this time, the torsion spring is stressed, and when the gear 803 rotates, it drives the second transmission shaft 808 to rotate synchronously. The following direction description will be based on Fig.11804, the eccentric wheel 805 rotates clockwise, and the air pressure in the cavity decreases. The air outlet 809 draws air to the outside until the two sealing plates 806 of the cavity are both rotated past the air outlet 809. At this time, the cavity is in a sealed state, and the eccentric wheel 805 continues to rotate until the sealing plate 806 of the cavity moves to one end of the fourth transmission tube 807. The cavity is connected to the fourth transmission tube 807, and the eccentric wheel 805 continues to rotate, so that the sealing plate 806 is squeezed back into the square groove by the inner wall of the vacuum shell 804. The volume of the cavity is reduced, and the air pressure is increased, so that the gas in the cavity flows through the fourth transmission tube 807 and is blown to the bottom of the upper mold shell 201 through the flow port 810.

[0043] When the lifting plate 106 moves upward, it squeezes the first spring, and the first spring is forced to drive the lower mold shell 2 to move upward. When the lower mold shell 2 moves, the two circular through grooves contact the two circular magnetic blocks 401. At this time, the circular through grooves drive the two circular magnetic blocks 401 to separate from the two magnetic top pillars 4, and the circular magnetic blocks 401 are in a horizontal state with the circular through grooves. When the lower mold shell 2 enters the baffle plate 304, a sealed space is formed between the lower mold shell 2, the upper mold shell 201 and the baffle plate 304, and the mold 6 enters the injection groove 601. As the lower mold shell 2 continues to move, the gas in the sealed space is squeezed into the air inlet 202, and the gas enters one end of the air inlet hollow tube 204 through the air inlet 202 and the hose 203, and pushes the moving block 206 toward the solid The fixed ring 205 approaches, and the second spring is squeezed during the movement of the moving block 206. When the moving block 206 moves to the end away from the first transmission tube 207, the first transmission tube 207 is connected to the hose 203. At this time, the gas will enter the gas collecting box 208 through the first transmission tube 207. As the gas in the gas collecting box 208 increases, the gas begins to push the slide plate 209 to move, and the third spring is stretched. At the same time, the lower pressure plate 3 contacts and squeezes the bottom of the upper mold shell 201. At this time, the fourth spring is compressed, and the lower pressure plate 3 slides into the second guide groove 303 under the influence of pressure. At the same time, the inclined groove of the first guide groove 301 squeezes the scraper 302 downward, and the scraper 302 moves horizontally along the second guide groove 303 until the scraper 30 2 moves to the connecting point of the inclined groove and the vertical groove of the first guide groove 301, the lower pressure plate 3 continues to descend, the scraper 302 will enter the vertical groove of the first guide groove 301 and limit it, at the same time, the inclined surface of the first inclined block 5 contacts and squeezes the inclined surface of the second inclined block 501, the second inclined block 501 begins to move under force, the second inclined block 501 moves and squeezes the inclined surface of the special-shaped block 502, the special-shaped block 502 moves upward under force and enters the rectangular groove, the first inclined block 5 limits the special-shaped block 502 by squeezing, when the scraper 302 is located at the top position in the vertical groove of the first guide groove 301, the special-shaped block 502 enters the rectangular groove, the top of the lower mold shell 2 fits with the bottom of the upper mold shell 201, and no sealed space is formed at this time, only the mold 6 and the injection groove 601 There is a certain gap between them. When the top of the lower mold shell 2 is fitted with the bottom of the upper mold shell 201, one end of the third transmission tube 213 is inserted into the second transmission tube 212, and then the output shaft of the driving motor 102 stops rotating, and the barrel 7 is opened manually. It is worth noting that the amount of plastic melt in the barrel 7 is manually matched in advance; the plastic melt starts to be discharged from the discharge port 701 and fills the discharge port 701, so that the gas in the gap between the mold 6 and the injection groove 601 cannot flow out from the discharge port 701, and the plastic melt falls into the gap between the mold 6 and the injection groove 601 through the discharge port 701. The gas in the gap is squeezed by the plastic melt, resulting in a smaller volume and an increased pressure. The gas in the gap will flow into the gas collecting box 208 through the air inlet 202.When the gap between the mold 6 and the injection groove 601 is about to be filled with molten plastic, the barrel 7 is closed, and no new molten plastic flows into the gap to squeeze the gas inside, so that the moving block 206 is no longer pushed by the gas, and the second spring is no longer subjected to force and drives the moving block 206 away from the fixed ring 205, and the moving block 206 is reset. At this time, the slide plate 209 is no longer pushed by the gas, and the third spring drives the slide plate 209 to reset. When the slide plate 209 resets and moves, the gas in the gas collecting box 208 is squeezed, so that the gas enters the air intake hollow tube 204 again through the first transmission pipe 207. The connection between the air intake hollow tube 204 and the hose 203 is blocked by the moving block 206, and the gas in the air collecting box 208 will flow into the hollow ring 21 0, and enters the cyclone hole of the vortex tube 211 through the hollow ring 210. Since the cyclone hole is inclined toward the hot air outlet, after passing through the cyclone hole of the vortex tube 211, the gas spirally rotates in the vortex tube 211 and forms a free vortex. Due to the high-speed rotation of the vortex, the angular velocity of the gas in the center of the vortex tube 211 is relatively high. At this time, the linear velocity of the gas in the vortex tube 211 is the same, so the angular velocity of the gas close to the inner wall of the vortex tube 211 is relatively low. Since the centrifugal force of a substance is proportional to the product of the angular velocity and the speed of the substance, the gas in the center of the vortex tube 211 has a greater centrifugal force, so that the gas in the center of the vortex tube 211 moves toward the inner wall. In the process of moving toward the inner wall, the gas in the center of the vortex tube 211 is mixed with the The gas at the inner wall of the vortex tube 211 is squeezed, collided and rubbed, and finally the energy of the gas in the center part of the vortex tube 211 is lost, and the energy is transferred to the gas at the inner wall of the vortex tube 211 in the form of heat energy. Therefore, the temperature of the gas at the inner wall of the vortex tube 211 increases, and the gas at the center part of the vortex tube 211 takes away the energy and flows toward the inner wall, so that the energy of the gas in the center part of the vortex tube 211 is reduced, and the internal energy is reduced. In a microscopic environment, the characteristics of the reduction in internal energy are reduced temperature and reduced movement speed. The temperature of the gas in the center part of the vortex tube 211 is reduced, the flow rate is slowed down, and a cold airflow is formed. Since the temperature of the gas at the inner wall of the vortex tube 211 increases, its internal energy is higher than that of the gas at the center, which is manifested as a higher speed. The gas at the inner wall of the vortex tube 211 has a faster flow speed, so it passes through the hot air outlet first, and is blocked by the blocking column from spiral movement, turning into a hot air flow flowing in the horizontal direction, flowing out from the hot air outlet, while the gas at the center of the vortex tube 211 is blocked by the gas at the inner wall to make a U-turn and move in the opposite direction, and finally flows into the second transmission tube 212 through the cold air outlet of the vortex tube 211, and flows into the third transmission tube 213 through the second transmission tube 212. The cold air flow flows downward along the third transmission tube 213, reducing the internal temperature of the lower mold shell 2, cooling the plastic melt in the gap between the mold 6 and the injection groove 601, and the cold air flow flows along the third transmission tube 213 and flows out to the outside from one end of the third transmission tube 213.

[0044] When the cold air flow flows along the third transmission pipe 213, the internal temperature of the lower mold shell 2 has not been completely reduced. At this time, the drive motor 102 is started again to make the lifting plate 106 move upward again, and the first spring is squeezed and contracted again to make the gear 803 move to the top of the rebound component 801. At this time, the gear 803 is meshed with the tooth block at the top of the rebound component 801, and then the drive motor 102 is turned off, and the torsion spring is reset and released to drive the gear 803 to rotate in the opposite direction. When the gear 803 rotates, it is affected by the tooth block and tension spring of the rebound component 801, and the gear 803 realizes idling. The rotation of the gear 803 drives the second transmission shaft 808 to rotate in the opposite direction The rotation of the second transmission shaft 808 drives the eccentric wheel 805 to rotate eccentrically counterclockwise inside the vacuum shell 804, and the three sealing plates 806 rotate counterclockwise along the inner wall of the vacuum shell 804. When the cavity located at the fourth transmission pipe 807 rotates, the internal air pressure decreases, and the cavity evacuates air to the gap between the mold 6 and the injection groove 601 through the fourth transmission pipe 807 and the flow port 810, so that the gap is in a low-pressure state. The bubbles in the plastic melt are enlarged by the low pressure, causing them to float and eventually break away from the surface of the plastic melt, thereby realizing the extraction of bubbles. As the eccentric wheel 805 continues to rotate, the gas in the cavity is discharged through the outlet 809.

[0045] After the bubbles in the gap between the mold 6 and the injection groove 601 are completely discharged, as the cold air flows along the third transmission pipe 213, the internal temperature of the lower mold shell 2 is reduced, and the plastic melt is cooled. After the plastic melt is cooled, a plastic lunch box will be formed. After the plastic lunch box is formed, the drive motor 102 is started, and the output shaft of the drive motor 102 rotates in the opposite direction, and drives the first fixed plate 103 and the lifting plate 106 to move downward, the first spring is no longer compressed and starts to reset, and the third transmission pipe 213 is separated from the second transmission pipe 212, and at the same time, the first fixed plate 103 descends to drive the gear 8 03 detaches from the tooth block of the rebound component 801 and meshes with the rack, then rotates counterclockwise, the torsion spring is stressed, the lower mold shell 2 moves downward away from the upper mold shell 201, and the lower mold shell 2 moves with the first inclined block 5 away from the second inclined block 501. At this time, the special-shaped block 502 is no longer squeezed by the second inclined block 501, and the fifth spring drives the special-shaped block 502 to reset. It is worth noting that during the cooling and molding of the plastic melt, due to the rough surface of the mold 6 and the temperature of the plastic melt during pouring, it may adhere to the mold 6. When the special-shaped block 502 is reset, it can The plastic lunch box on the surface of the mold 6 is pushed to prevent the plastic lunch box from adhering to the mold 6. The pushed plastic lunch box will be located in the injection groove 601. At the same time, the lower pressing plate 3 is no longer squeezed. The fourth spring drives the lower pressing plate 3 to move upward. As the lower pressing plate 3 moves, the scraper 302 will be squeezed by the inclined groove of the first guide groove 301, so that the scraper 302 moves linearly on the first guide groove 301 and the second guide groove 303. The movement of the scraper 302 can scrape off the scraps on the top surface of the plastic lunch box. The lower mold shell 2 continues to move downward, and the bottoms of the two circular magnetic blocks 401 are connected to the magnetic top column 4 One end contacts and is magnetically attracted, and the lower mold shell 2 continues to move downward, the circular magnetic block 401 will be disengaged from the circular through groove, and lift up the plastic lunch box, so that the plastic lunch box is separated from the injection groove 601, and finally the molded plastic lunch box is taken out manually. At this time, the gear 803 is engaged with the bottom tooth block of the rebound component 801, and the torsion spring reset drives the gear 803 to rotate. The gear 803 is affected by the tooth block and the tension spring of the rebound component 801, and the gear 803 realizes idling. At this point, the molding of the plastic lunch box is completed. When the plastic lunch box needs to be injected again, a certain amount of plastic melt is added to the material barrel 7, and then the equipment is restarted.

[0046] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A plastic lunch box forming device, comprising a support plate (1), characterized in that: It also includes a slide bar (101), four slide bars (101) are fixedly connected in a rectangular array on the top of the support plate (1), the outer walls of the four slide bars (101) are slidably connected to a lifting plate (106) in common, one side of the lifting plate (106) is fixedly connected to a first fixed plate (103), a driving motor (102) is installed at the bottom of the support plate (1), the output end of the driving motor (102) is fixedly connected to one end of a threaded rod (104), the outer wall of the threaded rod (104) is threadedly connected to the first fixed plate (103), the other end of the threaded rod (104) is rotatably connected to a second fixed plate (105), and one side of the second fixed plate (105) is fixedly connected to an upper mold shell (201), The outer walls of the four slide bars (101) are fixedly connected to the upper mold shell (201) in a through-type manner, and the outer walls of the four slide bars (101) are slidably connected to the lower mold shell (2). A first spring is connected in a rectangular array between the lifting plate (106) and the lower mold shell (2). The first spring is used to play a buffering role. The first spring is sleeved on the outer wall of the slide bar (101). A baffle plate (304) is fixedly connected to the outer side of the upper mold shell (201). The baffle plate (304) is used to prevent air from flowing out from between the baffle plate (304) and the lower mold shell (2) when the lower mold shell (2) moves upward. A molding mechanism for cooling the plastic lunch box is provided at the top of the upper mold shell (201); The molding mechanism comprises a hose (203), an air inlet (202) is symmetrically provided at the bottom of the upper mold shell (201), one end of the two air inlets (202) is commonly connected to a hose (203), the hose (203) is made of a high temperature resistant material, one end of the hose (203) is connected to an air inlet hollow tube (204), the air inlet hollow tube (204) is made of a high temperature resistant material, a fixing ring (205) is fixedly connected inside the air inlet hollow tube (204), a moving block (206) is slidably connected inside the air inlet hollow tube (204), the moving block (206) and the air inlet hollow tube (204) are sealed and slidable, a second spring is connected between the fixing ring (205) and the moving block (206), the outer wall of the air inlet hollow tube (204) is connected to a first transmission tube (207), one end of the first transmission tube (207) is connected to an air collecting box (2 08), a slide plate (209) is slidably connected inside the air collecting box (208), a third spring is connected between the slide plate (209) and the air collecting box (208), a support rod is fixedly connected to a rectangular array at the bottom of the air collecting box (208), the support rod is used to provide support for the air collecting box (208), the support rod is fixedly connected to the upper mold shell (201), a hollow ring (210) is fixedly connected to one end of the air inlet hollow tube (204), a vortex tube (211) is fixedly connected inside the hollow ring (210), a baffle column is fixedly connected to one end of the vortex tube (211), one end of the vortex tube (211) close to the baffle column is a hot air outlet, and the other end of the vortex tube (211) is a cold air outlet, and the cold air outlet of the vortex tube (211) is connected to a second transmission tube (212), and swirl holes are distributed circumferentially on the outer side of the vortex tube (211) and are inclined toward the hot air outlet; The molding mechanism further comprises a third transmission tube (213) connected to the interior of the lower mold shell (2); the third transmission tube (213) can be connected to the second transmission tube (212) when movable; and two injection molding grooves (601) are provided inside the lower mold shell (2); The molding mechanism also includes a lower pressing plate (3), the top of the lower mold shell (2) is symmetrically provided with second guide grooves (303), one of the second guide grooves (303) is slidably connected to the lower pressing plate (3), a fourth spring is connected between the bottom end of the lower pressing plate (3) and the second guide groove (303), a first guide groove (301) is penetrated through the outer wall of the lower pressing plate (3), the first guide groove (301) is composed of a vertical groove and an inclined groove, a scraper (302) is slidably connected to the first guide groove (301), and one side of the scraper (302) is slidably connected to the other second guide groove (303).

2. A plastic lunch box forming device according to claim 1, characterized in that: It also includes two groups of first inclined blocks (5) symmetrically fixed to the top of the lower mold shell (2), each group of first inclined blocks (5) consists of two, a rectangular groove is symmetrically opened at the bottom of the upper mold shell (201), a second inclined block (501) is slidably connected in the rectangular groove, the inclined surface of the first inclined block (501) can contact the inclined surface of the second inclined block (501) when the first inclined block (5) moves, a special-shaped block (502) is slidably connected in the rectangular groove, and a fifth spring is connected between the special-shaped block (502) and the upper mold shell (201).

3. A plastic lunch box forming device according to claim 2, characterized in that: It also includes a magnetic top column (4) symmetrically fixed to the top of the support plate (1), the two magnetic top columns (4) being slidably connected to the lifting plate (106), the bottom of the lower mold shell (2) being symmetrically provided with circular through grooves, the two magnetic top columns (4) being located in the two circular through grooves, the tops of the two magnetic top columns (4) being magnetically connected to circular magnetic blocks (401) adapted to the circular through grooves, and the circular magnetic blocks (401) being consistent with the circular through grooves.

4. A plastic lunch box forming device according to claim 3, characterized in that: It also includes a vertical plate (8) fixedly connected to the top of the support plate (1), a rebound assembly (801) being provided on one side of the vertical plate (8), a first transmission shaft (802) being fixedly connected to one side of the first fixed plate (103), a gear (803) being rotatably connected to one end of the first transmission shaft (802), a torsion spring being connected between the gear (803) and the first transmission shaft (802), the gear (803) being connected to the rebound assembly (801), and a second transmission shaft (808) being fixedly connected to one side of the gear (803).

5. A plastic lunch box forming device according to claim 4, characterized in that: It also includes an air extraction shell (804) eccentrically rotatably connected to the outer wall of the second transmission shaft (808); an eccentric wheel (805) is fixedly connected to the outer wall of the second transmission shaft (808); the eccentric wheel (805) is located inside the air extraction shell (804); and the eccentric wheel (805) is rotatably connected to the inner wall of the air extraction shell (804).

6. A plastic lunch box forming device according to claim 5, characterized in that: It also includes a sealing plate (806), the eccentric wheel (805) is provided with three square through grooves distributed in the circumferential direction, the sealing plate (806) is slidably connected in the square through groove, the surface of the sealing plate (806) is quenched and hardened and coated with a protective coating, a sixth spring is connected between the sealing plate (806) and the square through groove of the eccentric wheel (805), the air pumping shell (804) is provided with three cavities, all of which are composed of the air pumping shell (804), the eccentric wheel (805) and two adjacent sealing plates (806), the outer wall of the air pumping shell (804) is connected with a fourth transmission pipe (807) and an air outlet (809), the fourth transmission pipe (807) is made of a flexible material, one end of the fourth transmission pipe (807) is fixedly connected to the top of the upper mold shell (201), the bottom of the upper mold shell (201) is symmetrically provided with flow ports (810), one end of the two flow ports (810) are both connected to the fourth transmission pipe (807).

7. A plastic lunch box forming device according to claim 6, characterized in that: The material barrel (7) is also included. The material barrel (7) is installed on the top of the upper mold shell (201). The bottom of the upper mold shell (201) is provided with a plurality of discharge ports (701). The plurality of discharge ports (701) are all connected to the material barrel (7). The bottom of the upper mold shell (201) is symmetrically fixed with a mold (6). The two flow ports (810) and the two air inlets (202) are all corresponding to the mold (6). A high-temperature resistant sealing strip is connected between the baffle plate (304) and the upper mold shell (201).

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