Injection molding device for holiday lamp shell production

Abstract

The invention discloses an injection molding device for holiday lamp shell production, and relates to the technical field of injection molding, the injection molding device comprises a left case, a right case, a mounting gear ring, a hollow gear, a plurality of outer modules, a plurality of inner modules, a synchronous driving unit, at least one injection molding machine and a water cooling assembly, the hollow gear is arranged in the right case, the outer modules are arranged on the mounting gear ring, the inner modules are arranged on the hollow gear, the synchronous driving unit is mounted at the upper end of the left case and the upper end of the right case, and at least one injection molding machine and water cooling assembly is arranged in the left case. After the injection molding machine injects plastic into one injection molding cavity, the water cooling assembly cools the injection molding cavity, after cooling is completed, the synchronous driving unit drives the injection molding cavity to rotate, the outer module and the inner module are rotated to other positions for demolding, the next injection molding cavity is promoted to start injection molding rapidly, and the working efficiency of the injection molding device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an injection molding device for producing holiday lamp shells. Background Art

[0002] The lamp housing of holiday lights is usually manufactured by injection molding. The conventional injection molding method uses an opening and closing mold to form an injection cavity, fills the injection cavity with molten plastic, and then opens the mold to take out the molded lamp housing after the plastic cools. The existing injection molding device can produce multiple lamp housings each time the mold is opened, but the corresponding mold preheating and cooling require a lot of time and take a long time; the preheating and cooling time of a single injection molding mold is much shorter than that of a general multi-cavity mold, but the manufacturing efficiency is not high and is suitable for small batch production. Therefore, there is no injection molding equipment on the market that can reduce the preheating and cooling time of the equipment and speed up the manufacturing speed at the same time. General injection molded parts will carry plastic strips remaining in the injection channel, which requires manual time to trim, so improvements are needed. Summary of the invention

[0003] The object of the present invention is to provide an injection molding device for producing holiday light shells to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an injection molding device for producing holiday light shells, comprising a left chassis, a right chassis, a mounting gear ring, a hollow gear, several outer module groups, several inner module groups, a synchronous drive unit, at least one injection molding machine, and a water cooling assembly, wherein the mounting gear ring is arranged in the left chassis, the hollow gear is arranged in the right chassis, several of the outer module groups are arranged on the mounting gear ring, several of the inner module groups are arranged on the hollow gear, the synchronous drive unit is installed at the upper ends of the left chassis and the right chassis, and at least one of the injection molding machine and the water cooling assembly are arranged in the left chassis.

[0005] Furthermore, the synchronous drive unit includes a first gear, a second gear, a first motor and a rotating shaft. The first motor is arranged on the right chassis, the rotating shaft is connected to the motor shaft of the first motor, the first gear and the second gear are installed on the rotating shaft, the first gear is meshed with the mounting gear ring, and the second gear is meshed with the hollow gear. The first motor drives the rotating shaft to rotate, and the rotating shaft drives the first gear and the second gear to rotate synchronously. The first gear drives the mounting gear ring to rotate, and the mounting gear ring drives the outer module to rotate, the second gear drives the hollow gear, and the hollow gear drives the inner module to rotate. Each outer module corresponds to each inner module one by one. After the outer module and the inner module are combined into an injection cavity, an injection cavity is formed. After the injection molding machine injects plastic into an injection cavity, the water cooling component cools the injection cavity. After cooling is completed, the synchronous drive unit drives the injection cavity to rotate, and the outer module and the inner module are rotated to other positions for demolding, so as to prompt the next injection cavity to start injection molding quickly, thereby improving the working efficiency of the injection molding device.

[0006] Furthermore, each of the outer mold groups includes a water jacket, an inner mold cylinder, a core column, a pair of first electric push rods and a connecting plate. The water jacket is arranged on the inner ring of the mounting gear ring, the inner mold cylinder is installed inside the water jacket, the core column is connected to the water jacket through the connecting plate, the core column is located in the middle of the inner mold cylinder, and the pair of first electric push rods are installed on the core column.

[0007] Furthermore, each of the outer mold groups also includes a demoulding push plate, a rotating ring and some spoiler swirl plates, the demoulding push plate is connected to a pair of piston rods of the first electric push rods, an injection hole is provided on the demoulding push plate, the demoulding push plate is slidably installed between the inner mold barrel and the core column, the rotating ring is rotatably installed inside the water jacket, and a number of spoiler swirl plates are evenly distributed in a ring shape on the rotating ring, a water inlet hole is provided on the side of the water jacket close to the core column, and a water outlet hole is provided on the side of the water jacket away from the core column. When injection molding is performed, the piston rod of the first electric push rod retracts, pulling the demoulding push plate to the tail position, and the second electric push rod pushes the inner mold group into the inner mold barrel, and the mobile module drives the injection molding machine to be inserted into the injection hole of the demoulding push plate. After injection molding, the temperature sensor in the inner mold barrel detects the heat of the molten plastic, so that the solenoid valve in the outer mold group is opened, and the water in the water tank is poured into the water jacket.

[0008] Furthermore, the water cooling component includes a water supply system, a water inlet pipe, a water outlet pipe, a water tank and a pressure maintaining valve. The water tank is arranged in the middle of several outer module groups. A first inner tank connected to the water inlet hole is provided inside the water tank. A second inner tank connected to the water outlet hole is also provided inside the water tank. The first inner tank is connected to the second inner tank. The pressure maintaining valve is arranged at the connection between the first inner tank and the second inner tank. The water supply system is rotatably sealed and connected to the first inner tank of the water tank through the water inlet pipe, and the water supply system is rotatably sealed and connected to the second inner tank of the water tank through the water outlet pipe. A temperature sensor is arranged inside the inner mold cylinder of each outer module group, an electromagnetic valve is arranged at the water inlet hole of each water jacket, a one-way valve is arranged at the water outlet hole of the water jacket, the electromagnetic valve and the temperature sensor are connected to the control system through a circuit, and the water supply system is connected to the water inlet hole of each water jacket through the water inlet pipe. Cooling water is poured into the water tank, and the pressure of the cooling water in the first inner groove rises. When the water pressure exceeds the overflow pressure of the pressure-maintaining valve, the cooling water flows into the second inner groove through the pressure-maintaining valve, and finally flows out through the water outlet pipe. The setting of the pressure-maintaining valve allows a certain water pressure to be maintained in the first inner groove for cooling the outer module. When the cooling water enters the water jacket through the solenoid valve, the water pressure energy will drive the spoiler plate to move, so that the rotating ring and the spoiler plate rotate inside the water jacket, and the cooling water flow is evenly diffused to the outside of the inner mold barrel, thereby cooling the injection molded parts. The heat-absorbing cooling water flows into the second inner groove through the one-way valve of the water outlet hole. Through the setting of the rotating ring and the spoiler plate, the cooling water flows and diffuses more evenly on the outside of the injection molded parts, thereby enhancing the overall heat absorption and cooling effect, thereby achieving rapid cooling of the injection molded parts.

[0009] Furthermore, a mounting frame is provided on the side of the hollow gear away from the left chassis, and each group of the inner mold groups includes a pair of second electric push rods, a box cover, a positioning plate, several adjusting inner molds and several driven inner molds. The pair of the second electric push rods is arranged on the mounting frame, the box cover is connected to the piston rods of the pair of second electric push rods, the positioning plate is installed on the side of the box cover away from the second electric push rods, and several adjusting inner molds and driven inner molds are slidably installed on the side of the positioning plate away from the box cover. When the temperature sensor inside the inner mold barrel detects that the overall temperature of the injection lamp housing has dropped and the molten plastic reaches the solidification temperature, the solenoid valve is closed through the control system to prevent the cooling water from continuing to flow into the water jacket. The cooling water remaining in the water jacket continues to absorb the residual heat of the lamp housing to prevent the temperature of the inner mold barrel from being completely cooled, thereby enhancing the fluidity of the molten plastic during subsequent injection molding.

[0010] Furthermore, several of the adjusting inner molds and driven inner molds are evenly distributed in a ring shape, and the adjusting inner molds and the driven inner molds are spaced apart from each other. A round pin is provided on the side of each adjusting inner mold close to the positioning plate, and a slider is provided on the side of each driven inner mold close to the positioning plate. Several straight head slide grooves and round head slide grooves are provided on the positioning plate, and the round pin is slidably arranged in the round head slide groove, and the slider is installed in the straight head slide groove. A reset spring is arranged between each of the sliders and the straight head slide groove. Before injection molding, the second electric push rod pushes the inner mold group into the inner mold cylinder, and the second motor drives the active bevel gear to rotate, and the active bevel gear drives the bevel gear displacement disk to rotate. The inclined slide groove on the bevel gear displacement disk pushes the round pin to move, and all the adjusting inner molds move outward, and all the driven inner molds also move outward under the action of the adjusting inner mold, and the adjusting inner mold and the driven inner mold surround the inner wall of the lamp shell.

[0011] Furthermore, each group of the inner mold assembly also includes a second motor, an active bevel gear and a bevel gear shifting disk. The second motor is installed on the inner side of the box cover through a bracket, and the active bevel gear is installed on the motor shaft of the second motor. The bevel gear shifting disk is rotatably installed on the side of the positioning plate close to the box cover, and the bevel gear shifting disk is meshed with the active bevel gear. An inclined groove is provided on the bevel gear shifting disk, and the round pin is slidably connected with the inclined groove. When demolding is required, the bevel gear shifting disk is reversed to move the adjusting inner mold inward. Under the action of a reset spring, all the driven inner molds are also retracted inward, so that the adjusting inner mold and the driven inner mold are separated from the inner wall of the lamp housing. Subsequently, the second electric push rod retracts the inner mold assembly, and the first electric push rod pushes the demolding push plate to the outside of the inner mold cylinder to push the lamp housing out of the inner mold cylinder. Under the action of gravity, the lamp housing is separated from the demolding push plate and falls off the device, and the lamp housing falls onto the conveyor belt below the device to move to the next processing step.

[0012] Furthermore, at least one of the injection molding machines is installed in the left chassis through a movable module, and each injection molding machine includes an injection cylinder, a feeding screw, a feeding pipe and a third motor. The injection cylinder is connected to the movable module, and an electric heating wire is installed in the inner wall of the injection cylinder. The feeding screw is rotatably installed inside the injection cylinder, and the motor shaft of the third motor passes through the injection cylinder and is connected to the feeding screw. The feeding pipe is connected to the side of the injection cylinder close to the third motor. The movable module connects the end of the injection cylinder with the injection hole on the demolding push plate, and uses the feeding screw to squeeze the molten plastic into the injection cavity composed of the outer module and the inner mold.

[0013] Furthermore, the interior of the feeding screw is hollow, and a closing pin is slidably installed inside the feeding screw. The closing pin and the interior of the feeding screw are connected by an internal spring. An electromagnet is also arranged inside the feeding screw, and the electromagnet is connected to the control system circuit. After the injection cavity is filled, the electromagnet is energized to attract the closing pin to the end of the injection cylinder, so that the closing pin cuts off the interior of the injection cylinder and the injection cavity, thereby avoiding agglomeration in the injection channel and avoiding protruding plastic columns remaining on the surface of the lamp housing.

[0014] Compared with the prior art, the present invention has the following beneficial effects: After the injection molding machine injects plastic into an injection cavity, the water cooling component cools the injection cavity. After cooling, the synchronous driving unit drives the injection cavity to rotate, and rotates the outer mold group and the inner mold group to other positions for demolding, prompting the next injection cavity to start injection quickly, thereby improving the working efficiency of the injection molding device.

[0015] By setting the rotating ring and the swirl plate, the cooling water can flow and diffuse more evenly on the outside of the injection molded part, thereby enhancing the overall heat absorption and cooling effect, and realizing rapid cooling of the injection molded part. The cooling water remaining in the water jacket continues to absorb the residual heat of the lamp housing, preventing the temperature of the inner mold barrel from being completely cooled, and enhancing the fluidity of the molten plastic during subsequent injection molding.

[0016] By setting a closing pin, after the injection molding is completed, the closing pin is adsorbed by an electromagnet so that the closing pin cuts off the inside of the injection molding cylinder and the injection molding cavity, thereby avoiding agglomeration in the injection molding channel and avoiding protruding plastic columns remaining on the surface of the lamp housing, thereby achieving the effect of avoiding manual trimming again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a schematic diagram of the installation structure of the outer module part of the present invention; Figure 4 It is a schematic diagram of the structure inside the water jacket of the present invention; Figure 5 It is a schematic diagram of the installation structure of the inner module part of the present invention; Figure 6 It is a schematic diagram of the internal structure of the box cover of the present invention; Figure 7 This is a schematic diagram of the connection structure of the inner module of the present invention; Figure 8 It is a schematic diagram of the internal structure of the injection molding machine of the present invention.

[0018] In the figure: 1. left chassis; 2. right chassis; 3. first gear; 4. second gear; 5. mounting frame; 6. first motor; 7. mounting gear ring; 8. hollow gear; 9. outer mold group; 10. inner mold group; 11. water tank; 12. water jacket; 13. rotating ring; 14. spoiler swivel plate; 15. inner mold cylinder; 16. core column; 17. first electric push rod; 18. demoulding push plate; 19. second electric push rod; 20. box cover; 21. second motor; 22. active bevel gear; 23. bevel gear displacement plate; 24. positioning plate; 25. adjusting inner mold; 26. driven inner mold; 27. reset spring; 28. injection cylinder; 29. ​​third motor; 30. feeding screw; 31. inner spring; 32. closing pin; 33. feeding pipe; 34. connecting plate; 35. rotating shaft. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution, an injection molding device for producing holiday light shells, comprising a left chassis 1, a right chassis 2, a mounting gear ring 7, a hollow gear 8, four outer modules 9, four inner modules 10, a synchronous drive unit, two injection molding machines, and a water cooling assembly. The mounting gear ring 7 is arranged in the left chassis 1, the hollow gear 8 is arranged in the right chassis 2, the four outer modules 9 are arranged on the mounting gear ring 7, the four inner modules 10 are arranged on the hollow gear 8, the synchronous drive unit is installed at the upper ends of the left chassis 1 and the right chassis 2, and the two injection molding machines and the water cooling assembly are arranged in the left chassis 1.

[0021] The synchronous drive unit includes a first gear 3, a second gear 4, a first motor 6 and a rotating shaft 35. The first motor 6 is arranged on the right chassis 2. The rotating shaft 35 is connected to the motor shaft of the first motor 6. The first gear 3 and the second gear 4 are installed on the rotating shaft 35. The first gear 3 is meshed and connected with the mounting gear ring 7. The second gear 4 is meshed and connected with the hollow gear 8. The first motor 6 drives the rotating shaft 35 to rotate. The rotating shaft 35 drives the first gear 3 and the second gear 4 to rotate synchronously. The first gear 3 drives the mounting gear ring 7 to rotate. The mounting gear ring 7 The outer mold group 9 is driven to rotate, the second gear 4 drives the hollow gear 8, and the hollow gear 8 drives the inner mold group 10 to rotate. Each outer mold group 9 corresponds to each inner mold group 10 one by one. The outer mold group 9 and the inner mold group 10 are molded together to form an injection cavity. After the injection molding machine injects plastic into an injection cavity, the water cooling component cools the injection cavity. After cooling is completed, the synchronous driving unit drives the injection cavity to rotate, and the outer mold group 9 and the inner mold group 10 are rotated to other positions for demolding, so as to prompt the next injection cavity to start injection quickly, thereby improving the working efficiency of the injection molding device.

[0022] Each outer mold group 9 includes a water jacket 12, an inner mold cylinder 15, a core column 16, a pair of first electric push rods 17 and a connecting plate 34. The water jacket 12 is arranged on the inner ring of the mounting gear ring 7, and the inner mold cylinder 15 is installed inside the water jacket 12. The core column 16 is connected to the water jacket 12 through the connecting plate 34. The core column 16 is located in the middle of the inner mold cylinder 15. A pair of first electric push rods 17 are installed on the core column 16. Each outer mold group 9 also includes a demolding push plate 18, a rotating ring 13 and some interfering flow swirl plates 14. The demolding push plate 18 is connected to the piston rod of the pair of first electric push rods 17. The demolding push plate 18 is provided with an injection hole. The demolding push plate 18 is slidably installed between the inner mold cylinder 15 and the core column 16. The rotating ring 13 is rotatably installed inside the water jacket 12. If the interference flow swirl plate 14 is evenly distributed on the rotating ring 13 in a ring shape, a water inlet hole is opened on the side of the water jacket 12 close to the core column 16, and a water outlet hole is opened on the side of the water jacket 12 away from the core column 16. During injection molding, the piston rod of the first electric push rod 17 is retracted to pull the demoulding push plate 18 to the tail position, and the second electric push rod 19 pushes the inner module 10 into the inner mold cylinder 15. The mobile module drives the injection molding machine to be inserted into the injection hole of the demoulding push plate 18. After injection molding, the temperature sensor in the inner mold cylinder 15 detects the heat of the molten plastic, so that the solenoid valve in the outer module 9 is opened, and the water in the water tank 11 is poured into the water jacket 12.

[0023] The water cooling assembly (not shown) includes a water supply system, a water inlet pipe, a water outlet pipe, a water tank 11 and a pressure-maintaining valve. The water tank 11 is arranged in the middle of the four outer mold groups 9. A first inner tank connected to the water inlet hole is provided inside the water tank 11. A second inner tank connected to the water outlet hole is also provided inside the water tank 11. The first inner tank is connected to the second inner tank. The pressure-maintaining valve is arranged at the connection between the first inner tank and the second inner tank. The water supply system is rotatably sealed and connected to the first inner tank of the water tank 11 through the water inlet pipe, and the water supply system is rotatably sealed and connected to the second inner tank of the water tank 11 through the water outlet pipe; a temperature sensor is arranged inside the inner mold cylinder 15 of each outer mold group 9, an electromagnetic valve is arranged at the water inlet hole of each water jacket 12, a one-way valve is arranged at the water outlet hole of the water jacket 12, the electromagnetic valve and the temperature sensor are connected to the control system through a circuit, and the water supply system supplies water to the water tank 11 through the water inlet pipe. Cooling water is poured into the first inner groove, and the pressure of the cooling water in the first inner groove rises. When the water pressure exceeds the overflow pressure of the pressure-maintaining valve, the cooling water flows into the second inner groove through the pressure-maintaining valve, and finally flows out through the water outlet pipe. The setting of the pressure-maintaining valve allows a certain water pressure to be maintained in the first inner groove for cooling the outer module 9. When the cooling water enters the water jacket 12 through the solenoid valve, the water pressure energy will drive the spoiler swirl plate 14 to move, so that the rotating ring 13 and the spoiler swirl plate 14 rotate inside the water jacket 12, and the cooling water flow is evenly diffused to the outside of the inner mold cylinder 15, so as to cool the injection molded parts. The heat-absorbing cooling water flows into the second inner groove through the one-way valve of the water outlet hole. Through the setting of the rotating ring 13 and the spoiler swirl plate 14, the cooling water flows and diffuses more evenly on the outside of the injection molded parts, thereby enhancing the overall heat absorption and cooling effect, and realizing rapid cooling of the injection molded parts.

[0024] A mounting frame 5 is provided on the side of the hollow gear 8 away from the left chassis 1. Each group of inner molds 10 includes a pair of second electric push rods 19, a box cover 20, a positioning plate 24, six adjusting inner molds 25 and six driven inner molds 26. The pair of second electric push rods 19 are provided on the mounting frame 5. The box cover 20 is connected to the piston rods of the pair of second electric push rods 19. The positioning plate 24 is installed on the side of the box cover 20 away from the second electric push rods 19. The six adjusting inner molds 25 and the driven inner molds 26 are slidably installed on the side of the positioning plate 24 away from the box cover 20. The six adjusting inner molds 25 and the driven inner molds 26 are evenly distributed in an annular shape. The adjusting inner molds 25 and the driven inner molds 26 are spaced apart from each other. A round pin is provided on the side of each adjusting inner mold 25 close to the positioning plate 24. Each A slider is provided on the side of the driven inner mold 26 close to the positioning plate 24, and six straight-head slide grooves and round-head slide grooves are provided on the positioning plate 24. The round pin is slidably arranged in the round-head slide groove, and the slider is installed in the straight-head slide groove. A return spring 27 is provided between each slider and the straight-head slide groove. Each group of inner mold 10 also includes a second motor 21, an active bevel gear 22 and a bevel gear displacement plate 23. The second motor 21 is installed on the inner side of the box cover 20 through a bracket, and the active bevel gear 22 is installed on the motor shaft of the second motor 21. The bevel gear displacement plate 23 is rotatably installed on the side of the positioning plate 24 close to the box cover 20. The bevel gear displacement plate 23 is meshed and connected with the active bevel gear 22. An inclined slide groove is provided on the bevel gear displacement plate 23, and the round pin is slidably connected with the inclined slide groove.

[0025] When the temperature sensor inside the inner mold barrel 15 detects that the overall temperature of the injection lamp housing has dropped and the molten plastic has reached the solidification temperature, the solenoid valve is closed through the control system to prevent the cooling water from continuing to flow into the water jacket 12. The cooling water remaining in the water jacket 12 continues to absorb the residual heat of the lamp housing to prevent the temperature of the inner mold barrel 15 from completely cooling down. During the subsequent injection molding, the fluidity of the molten plastic is enhanced. Before injection molding, the second electric push rod 19 pushes the inner mold assembly 10 into the inner mold barrel 15, and the second motor 21 drives the active bevel gear 22 to rotate, and the active bevel gear 22 drives the bevel gear displacement disk 23 to rotate. The inclined slide groove on the bevel gear displacement disk 23 pushes the round pin to move, and all the adjustment inner molds 25 move outward. The driven inner mold 26 also moves outward under the action of the adjusting inner mold 25, and the adjusting inner mold 25 and the driven inner mold 26 surround the inner wall of the lamp housing. When demolding is required, the bevel gear displacement plate 23 is reversed to move the adjusting inner mold 25 inward. Under the action of the reset spring 27, all the driven inner molds 26 are also retracted inward, so that the adjusting inner mold 25 and the driven inner mold 26 are separated from the inner wall of the lamp housing. Then the second electric push rod 19 retracts the inner mold group 10, and the first electric push rod 17 pushes the demolding push plate 18 to the outside of the inner mold cylinder 15 to push the lamp housing out of the inner mold cylinder 15. Under the action of gravity, the lamp housing separates from the demolding push plate 18 and falls off from the device. The lamp housing falls onto the conveyor belt below the device and moves to the next processing step.

[0026] Two injection molding machines are installed in the left chassis 1 through a mobile module (not shown in the figure), each injection molding machine includes an injection molding barrel 28, a feeding screw 30, a feeding pipe 33 and a third motor 29, the injection molding barrel 28 is connected to the mobile module, an electric heating wire is installed in the inner wall of the injection molding barrel 28, the feeding screw 30 is rotatably installed inside the injection molding barrel 28, the motor shaft of the third motor 29 passes through the injection molding barrel 28 and is connected to the feeding screw 30, the feeding pipe 33 is connected to the side of the injection molding barrel 28 close to the third motor 29, the feeding screw 30 is hollow inside, and a closing pin 32 is slidably installed inside the feeding screw 30, and the closing pin 33 is connected to the third motor 29. 2 is connected to the inner part of the feeding screw 30 with an inner spring 31, and the inner part of the feeding screw 30 is also provided with an electromagnet (not shown in the figure), which is connected to the control system circuit. The moving module docks the end of the injection cylinder 28 with the injection hole on the demoulding push plate 18, and the feeding screw 30 is used to squeeze the molten plastic into the injection cavity formed by the outer module 9 and the inner module 10. After the injection cavity is filled, the electromagnet is energized to attract the closing pin 32 to the end of the injection cylinder 28, so that the closing pin 32 cuts off the inside of the injection cylinder 28 and the injection cavity, thereby avoiding agglomeration in the injection channel and avoiding the protruding plastic column remaining on the surface of the lamp housing.

[0027] The working principle of the present invention is as follows: the first motor 6 drives the rotating shaft 35 to rotate, the rotating shaft 35 drives the first gear 3 and the second gear 4 to rotate synchronously, the first gear 3 drives the mounting gear ring 7 to rotate, the mounting gear ring 7 drives the outer module 9 to rotate, the second gear 4 drives the hollow gear 8, the hollow gear 8 drives the inner module 10 to rotate, each outer module 9 corresponds to each inner module 10 one by one, and the outer module 9 and the inner module 10 are molded together to form an injection cavity. After the injection molding machine injects plastic into an injection cavity, the water cooling component cools the injection cavity. After cooling is completed, the synchronous driving unit drives the injection cavity to rotate, and the outer module 9 and the inner module 10 are rotated to other positions for demolding, so as to prompt the next injection cavity to start injection molding quickly, thereby improving the working efficiency of the injection molding device.

[0028] During injection molding, the piston rod of the first electric push rod 17 retracts, pulling the demoulding push plate 18 to the tail position, and the second electric push rod 19 pushes the inner mold group 10 into the inner mold cylinder 15. The mobile mold group drives the injection molding machine to be inserted into the injection hole of the demoulding push plate 18. After injection molding, the temperature sensor in the inner mold cylinder 15 detects the heat of the molten plastic, so that the solenoid valve in the outer mold group 9 opens, and the water in the water tank 11 is poured into the water jacket 12.

[0029] The water supply system injects cooling water into the water tank 11 through the water inlet pipe, and the pressure of the cooling water in the first inner tank rises. When the water pressure exceeds the overflow pressure of the pressure-maintaining valve, the cooling water flows into the second inner tank through the pressure-maintaining valve, and finally flows out through the water outlet pipe. The setting of the pressure-maintaining valve allows a certain water pressure to be maintained in the first inner tank for cooling the outer module 9. When the cooling water enters the water jacket 12 through the solenoid valve, the water pressure energy will drive the spoiler 14 to move, so that the rotating ring 13 and the spoiler 14 rotate inside the water jacket 12, and the cooling water flow is evenly diffused to the outside of the inner mold cylinder 15, so as to cool the injection molded parts. The heat-absorbing cooling water flows into the second inner tank through the one-way valve of the water outlet hole. Through the setting of the rotating ring 13 and the spoiler 14, the cooling water flows and diffuses more evenly on the outside of the injection molded parts, thereby enhancing the overall heat absorption and cooling effect, and realizing rapid cooling of the injection molded parts.

[0030] When the temperature sensor inside the inner mold barrel 15 detects that the overall temperature of the injection lamp housing has dropped and the molten plastic has reached the solidification temperature, the solenoid valve is closed through the control system to prevent the cooling water from continuing to flow into the water jacket 12. The cooling water remaining in the water jacket 12 continues to absorb the residual heat of the lamp housing to prevent the temperature of the inner mold barrel 15 from completely cooling down. During the subsequent injection molding, the fluidity of the molten plastic is enhanced. Before injection molding, the second electric push rod 19 pushes the inner mold assembly 10 into the inner mold barrel 15, and the second motor 21 drives the active bevel gear 22 to rotate, and the active bevel gear 22 drives the bevel gear displacement disk 23 to rotate. The inclined slide groove on the bevel gear displacement disk 23 pushes the round pin to move, and all the adjustment inner molds 25 move outward. The driven inner mold 26 also moves outward under the action of the adjusting inner mold 25, and the adjusting inner mold 25 and the driven inner mold 26 surround the inner wall of the lamp housing. When demolding is required, the bevel gear displacement plate 23 is reversed to move the adjusting inner mold 25 inward. Under the action of the reset spring 27, all the driven inner molds 26 are also retracted inward, so that the adjusting inner mold 25 and the driven inner mold 26 are separated from the inner wall of the lamp housing. Then the second electric push rod 19 retracts the inner mold group 10, and the first electric push rod 17 pushes the demolding push plate 18 to the outside of the inner mold cylinder 15 to push the lamp housing out of the inner mold cylinder 15. Under the action of gravity, the lamp housing separates from the demolding push plate 18 and falls off from the device. The lamp housing falls onto the conveyor belt below the device and moves to the next processing step.

[0031] The mobile module docks the end of the injection cylinder 28 with the injection hole on the demolding push plate 18, and uses the feeding screw 30 to squeeze the molten plastic into the injection cavity formed by the outer module 9 and the inner module 10. After the injection cavity is filled, the electromagnet is energized to attract the closing pin 32 to the end of the injection cylinder 28, so that the closing pin 32 cuts off the inside of the injection cylinder 28 and the injection cavity, thereby avoiding agglomeration in the injection channel and avoiding protruding plastic columns remaining on the surface of the lamp housing.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An injection molding device for producing holiday light housings, characterized in that: The invention comprises a left chassis (1), a right chassis (2), a mounting gear ring (7), a hollow gear (8), a plurality of outer modules (9), a plurality of inner modules (10), a synchronous drive unit, at least one injection molding machine, and a water cooling component, wherein the mounting gear ring (7) is arranged in the left chassis (1), the hollow gear (8) is arranged in the right chassis (2), a plurality of the outer modules (9) are arranged on the mounting gear ring (7), a plurality of the inner modules (10) are arranged on the hollow gear (8), the synchronous drive unit is installed at the upper ends of the left chassis (1) and the right chassis (2), and at least one injection molding machine and the water cooling component are arranged in the left chassis (1).

2. The injection molding device for producing holiday light housing according to claim 1, characterized in that: The synchronous drive unit comprises a first gear (3), a second gear (4), a first motor (6) and a rotating shaft (35); the first motor (6) is arranged on the right chassis (2); the rotating shaft (35) is connected to the motor shaft of the first motor (6); the first gear (3) and the second gear (4) are mounted on the rotating shaft (35); the first gear (3) is meshedly connected to the mounting gear ring (7); and the second gear (4) is meshedly connected to the hollow gear (8).

3. The injection molding device for producing holiday light housing according to claim 1, characterized in that: Each of the outer mold groups (9) comprises a water jacket (12), an inner mold barrel (15), a core column (16), a pair of first electric push rods (17) and a connecting plate (34); the water jacket (12) is arranged on the inner ring of the mounting gear ring (7); the inner mold barrel (15) is installed inside the water jacket (12); the core column (16) is connected to the water jacket (12) via the connecting plate (34); the core column (16) is located in the middle of the inner mold barrel (15); and the pair of first electric push rods (17) are installed on the core column (16).

4. The injection molding device for producing holiday light housing according to claim 3, characterized in that: Each of the outer mold groups (9) further comprises a demoulding push plate (18), a rotating ring (13) and some spoiler vortex plates (14); the demoulding push plate (18) is connected to the piston rods of a pair of first electric push rods (17); an injection hole is provided on the demoulding push plate (18); the demoulding push plate (18) is slidably mounted between the inner mold cylinder (15) and the core column (16); the rotating ring (13) is rotatably mounted inside the water jacket (12); a plurality of spoiler vortex plates (14) are evenly distributed in an annular shape on the rotating ring (13); a water inlet hole is provided on a side of the water jacket (12) close to the core column (16); and a water outlet hole is provided on a side of the water jacket (12) away from the core column (16).

5. The injection molding device for producing holiday light housing according to claim 4, characterized in that: The water cooling assembly comprises a water supply system, a water inlet pipe, a water outlet pipe, a water tank (11) and a pressure-retaining valve. The water tank (11) is arranged in the middle of a plurality of outer mold groups (9). A first inner groove connected to the water inlet hole is provided inside the water tank (11). A second inner groove connected to the water outlet hole is also provided inside the water tank (11). The first inner groove is connected to the second inner groove. The pressure-retaining valve is arranged at the connection point between the first inner groove and the second inner groove. The water supply system is rotatably sealedly connected to the first inner groove of the water tank (11) through the water inlet pipe. The water supply system is rotatably sealedly connected to the second inner groove of the water tank (11) through the water outlet pipe. A temperature sensor is arranged inside the inner mold cylinder (15) of each outer mold group (9). A solenoid valve is arranged at the water inlet hole of each water jacket (12). A one-way valve is arranged at the water outlet hole of the water jacket (12). The solenoid valve and the temperature sensor are connected to the control system through a circuit.

6. The injection molding device for producing holiday light housing according to claim 1, characterized in that: A mounting frame (5) is provided on the side of the hollow gear (8) away from the left chassis (1), and each group of the inner mold groups (10) includes a pair of second electric push rods (19), a box cover (20), a positioning plate (24), a plurality of adjustment inner molds (25) and a plurality of driven inner molds (26). The pair of second electric push rods (19) are provided on the mounting frame (5), the box cover (20) is connected to the piston rods of the pair of second electric push rods (19), the positioning plate (24) is installed on the side of the box cover (20) away from the second electric push rods (19), and the plurality of adjustment inner molds (25) and driven inner molds (26) are slidably installed on the side of the positioning plate (24) away from the box cover (20).

7. The injection molding device for producing holiday light housing according to claim 6, characterized in that: A plurality of the adjusting inner dies (25) and the driven inner dies (26) are evenly distributed in a ring shape. The adjusting inner dies (25) and the driven inner dies (26) are spaced apart from each other. A round pin is provided on a side of each adjusting inner dies (25) close to the positioning plate (24). A slider is provided on a side of each driven inner dies (26) close to the positioning plate (24). A plurality of straight-headed slide grooves and round-headed slide grooves are provided on the positioning plate (24). The round pin is slidably provided in the round-headed slide groove. The slider is installed in the straight-headed slide groove. A return spring (27) is provided between each slider and the straight-headed slide groove.

8. The injection molding device for producing holiday light housing according to claim 7, characterized in that: Each group of the inner mold assembly (10) further comprises a second motor (21), a driving bevel gear (22) and a bevel gear displacement plate (23); the second motor (21) is mounted on the inner side of the housing cover (20) via a bracket; the driving bevel gear (22) is mounted on the motor shaft of the second motor (21); the bevel gear displacement plate (23) is rotatably mounted on a side of the positioning plate (24) close to the housing cover (20); the bevel gear displacement plate (23) is meshingly connected with the driving bevel gear (22); an inclined slide groove is provided on the bevel gear displacement plate (23); and the round pin is slidably connected with the inclined slide groove.

9. The injection molding device for producing holiday light housing according to claim 1, characterized in that: At least one of the injection molding machines is installed in the left chassis (1) through a movable module. Each injection molding machine includes an injection molding barrel (28), a feeding screw (30), a feeding pipe (33) and a third motor (29). The injection molding barrel (28) is connected to the movable module. An electric heating wire is installed in the inner wall of the injection molding barrel (28). The feeding screw (30) is rotatably installed inside the injection molding barrel (28). The motor shaft of the third motor (29) passes through the injection molding barrel (28) and is connected to the feeding screw (30). The feeding pipe (33) is connected to a side of the injection molding barrel (28) close to the third motor (29).

10. The injection molding device for producing holiday light housing according to claim 9, characterized in that: The feeding screw (30) is hollow inside, a closing pin (32) is slidably mounted inside the feeding screw (30), an inner spring (31) is connected between the closing pin (32) and the inside of the feeding screw (30), and an electromagnet is also arranged inside the feeding screw (30), and the electromagnet is connected to a control system circuit.

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