Coaming injection molding device

Abstract

The coaming injection molding device comprises a mold and an injection molding head, the injection molding head comprises a feeding conveying pipe, a material distributing barrel and an adjusting sleeve, one end of the material distributing barrel is connected with the feeding conveying pipe, and the other end of the material distributing barrel is sealed; the adjusting sleeve is rotatably arranged outside the material distributing barrel in a sleeving manner and is in sealing fit with the material distributing barrel, and the adjusting sleeve is connected with a first rotation driving mechanism; a vertical first injection molding pipe is arranged at the bottom of the adjusting sleeve, a vertical second injection molding pipe is arranged at the top of the adjusting sleeve, a feeding port is formed in the bottom of the material distributing barrel and communicates with the first injection molding pipe, and a cleaning mechanism is arranged above the second injection molding pipe. According to the injection molding device, the first injection molding pipe and the second injection molding pipe sequentially move to the injection molding position and the cleaning position, when the first injection molding pipe is located at the injection molding position, the second injection molding pipe is located at the cleaning position, and similarly, when the first injection molding pipe is located at the cleaning position, the second injection molding pipe is located at the injection molding position; and the other injection molding pipe can be cleaned, the two working procedures are carried out at the same time, and the production efficiency is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of plastic injection molding equipment, and in particular, to a gusset injection device. Background Art

[0002] Gusset boxes are commonly used packaging boxes, usually made of plastic. Plastic gussets are generally produced by injection molding process. The injection molding equipment usually includes a mold, a barrel for melting plastic raw materials, an injection head for injecting plastic into the mold, and a conveying mechanism for conveying the plastic in the barrel to the injection head. After a traditional injection head completes one injection, a certain amount of molten plastic inevitably remains inside the injection head. After the injection head leaves the mold, it gradually cools, causing the remaining plastic to solidify and adhere inside the injection head. During the next injection molding, it affects the fluidity of the molten plastic in the injection head, and the solidified plastic may enter the mold along with the molten plastic, affecting the quality of the gusset.

[0003] To solve the above problems, some injection molding devices are provided with a cleaning mechanism. After each injection molding, the cleaning mechanism is used to remove the residual plastic inside the injection head. For example, the injection head cleaning equipment disclosed in the utility model patent with the application number CN202120900198.4, and an injection molding machine for facilitating the cleaning of the injection head disclosed in the utility model patent with the application number CN202320127159.4. Although these injection molding devices can clean the residual plastic material inside the injection head, during the cleaning, the injection head cannot work, which affects the production efficiency during mass production. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a gusset injection device that can clean the injection head without affecting the production efficiency and is suitable for mass production of gussets on a large scale.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a gusset injection device, including a mold and an injection head,

[0006] The injection head includes a feed conveying pipe, a distribution barrel, and an adjusting sleeve. One end of the distribution barrel is connected to the feed conveying pipe, and the other end is sealed. The adjusting sleeve is rotatably sleeved outside the distribution barrel and is in sealed cooperation with the distribution barrel. The adjusting sleeve is connected to a first rotation driving mechanism. A vertical first injection pipe is provided at the bottom of the adjusting sleeve, and a vertical second injection pipe is provided at the top. An inlet is provided at the bottom of the distribution barrel, and the inlet is communicated with the first injection pipe. A cleaning mechanism is provided above the second injection pipe.

[0007] Further, the cleaning mechanism includes a first lifting mechanism. An installation seat is arranged at the lower end of the first lifting mechanism. A cleaning motor and a gas supply mechanism are arranged on the lower surface of the installation seat. The cleaning motor is connected to a vertical cleaning shaft, and vertical scraping blades are arranged on the outer wall of the cleaning shaft. The cleaning shaft is a hollow shaft, and a rotary joint is arranged at the upper end of the inner hole of the cleaning shaft. The rotary joint is connected to the gas supply mechanism through a hose.

[0008] Further, an installation frame is arranged on the lower surface of the installation seat. The cleaning shaft is installed on the installation frame. The cleaning motor is connected to the cleaning shaft through a transmission assembly. A positioning disk is fixedly arranged on the outer wall of the cleaning shaft above the scraping blade. Inner sleeves and outer sleeves are arranged on the lower surface of the positioning disk. The inner diameter of the inner sleeve is adapted to the outer diameters of the first injection molding pipe and the second injection molding pipe. A waste material collection cavity is arranged between the inner sleeve and the outer sleeve. A bottom plate is arranged at the lower end of the waste material collection cavity. A waste material inlet is arranged at the top of the inner sleeve. A plurality of exhaust holes are arranged on the positioning disk at the top of the waste material collection cavity.

[0009] Further, a heating mechanism is arranged inside the material distribution cylinder, and a heat preservation layer is arranged outside the adjusting sleeve.

[0010] Further, the mold is installed on a lifting seat, and the lifting seat is connected to a second lifting mechanism.

[0011] Further, the mold includes a stationary mold arranged horizontally and a moving mold arranged above the stationary mold. A cavity is arranged on the upper surface of the stationary mold. A mold core that is slidably matched with the cavity is arranged on the lower surface of the moving mold. A gate that penetrates the moving mold is arranged on the moving mold. A plurality of exhaust grooves that extend downward from the top of the side wall are arranged on the side wall of the cavity. The distance from the lower end of the exhaust groove to the bottom wall of the cavity is equal to the thickness of the surrounding plate. The moving mold is connected to a third lifting mechanism. During the downward movement of the moving mold, when the lower surface of the moving mold reaches the upper surface of the stationary mold, the distance from the lower surface of the mold core to the bottom surface of the cavity is equal to the thickness of the surrounding plate.

[0012] Further, a horizontal positioning plate is arranged on the side wall of the bottom wall of the moving mold. A vertical guide shaft is arranged on the upper surface of the positioning plate. The guide shaft penetrates the moving mold and is slidably matched with the moving mold. The third lifting mechanism is installed on the positioning plate.

[0013] Further, it further includes a turntable. The turntable is connected to a third rotation driving mechanism. An injection molding station, a plugging and extrusion station, and a cooling and demolding station are sequentially arranged above the turntable along its rotation direction. Molds are arranged at the injection molding station, the plugging and extrusion station, and the cooling and demolding station. A fifth lifting mechanism is arranged at the plugging and extrusion station. A plug is arranged at the lower end of the fifth lifting mechanism. A cooling mechanism is arranged at the cooling and demolding station.

[0014] Further, a circular or rectangular first support groove is provided at the upper port of the gate, strip-shaped limiting plates are provided on both side walls at the upper end of the plug, magnetic attraction blocks are fixedly arranged on the upper surfaces of the limiting plates, and an electromagnet is arranged at the lower end of the fifth lifting mechanism;

[0015] Two strip-shaped second support grooves are provided at the bottom of the first support groove, the second support grooves extend radially to the gate, and the second support grooves are adapted to the limiting plates; a cross groove is provided on the upper surface of the magnetic attraction block; a fourth lifting mechanism is provided at the cooling and demolding station, an adjusting motor is provided at the lower end of the fourth lifting mechanism, and a cross-shaped driving head adapted to the cross groove is provided at the lower end of the main shaft of the adjusting motor.

[0016] Further, the cooling mechanism includes a water tank arranged below the turntable, a water spray pipe network is arranged above the water tank, the water spray direction of the water spray pipe network is upward, and the water tank is connected to the water spray pipe network through a water pipe, and a water pump is arranged on the water pipe; cooling holes are arranged on the turntable, and the fixed mold covers the cooling holes.

[0017] The beneficial effects of the present invention are as follows: In the present invention, the adjusting sleeve can be driven to rotate by the first rotation driving mechanism, driving the first injection pipe and the second injection pipe to move to the injection position and the cleaning position in sequence. When the first injection pipe is in the injection position, the second injection pipe is in the cleaning position. Similarly, when the first injection pipe is in the cleaning position, the second injection pipe is in the injection position. When one injection pipe is injecting, the other injection pipe can be cleaned, and the two processes are carried out simultaneously to ensure the production efficiency. Description of the Drawings

[0018] Figure 1 is the front view schematic diagram of Embodiment 1;

[0019] Figure 2 is Figure 1 the sectional view along A-A in

[0020] Figure 3 is the schematic diagram during cleaning of Embodiment 1;

[0021] Figure 4 is Figure 3 the enlarged schematic diagram of part B in

[0022] Figure 5 is the schematic diagram of Embodiment 2;

[0023] Figure 6 is the schematic diagram during injection molding of Embodiment 3;

[0024] Figure 7 is the top view schematic diagram of the turntable of Embodiment 4;

[0025] Figure 8It is a cross-sectional schematic view of the injection molding station in the fourth embodiment;

[0026] Figure 9 It is a cross-sectional schematic view of the plugging and extrusion station in the fourth embodiment;

[0027] Figure 10 It is a cross-sectional schematic view of the cooling and demolding station in the fourth embodiment;

[0028] Figure 11 It is a bottom view schematic of the cross-shaped drive head;

[0029] Figure 12 It is Figure 10 The enlarged schematic of part C in

[0030] Figure 13 It is Figure 12 The D-D cross-sectional schematic in

[0031] Reference numerals: 1 - mold; 11 - lifting seat; 12 - second lifting mechanism; 13 - fixed mold; 14 - moving mold; 15 - cavity; 16 - mold core; 17 - gate; 18 - exhaust groove; 19 - third lifting mechanism; 110 - positioning plate; 111 - guide shaft; 113 - plug; 114 - limit plate; 115 - magnetic block; 116 - electromagnet; 117 - first support groove; 118 - second support groove; 119 - cross groove; 120 - fourth lifting mechanism; 121 - adjustment motor; 122 - cross-shaped drive head; 2 - injection head; 21 - feed conveying pipe; 22 - distribution cylinder; 23 - adjusting sleeve; 24 - first rotation driving mechanism; 25 - first injection pipe; 26 - second injection pipe; 27 - feed inlet; 28 - first lifting mechanism; 29 - mounting seat; 210 - cleaning motor; 211 - air supply mechanism; 212 - cleaning shaft; 213 - scraping blade; 214 - rotary joint; 215 - hose; 216 - mounting bracket; 217 - positioning disk; 218 - inner sleeve; 219 - outer sleeve; 220 - bottom plate; 221 - waste collection cavity; 222 - waste inlet; 223 - heating mechanism; 224 - fifth lifting mechanism; 3 - turntable; 31 - third rotation driving mechanism; 32 - water tank; 33 - water spray pipe network; 34 - water pipe; 35 - water pump; 36 - cooling hole. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Embodiment 1

[0034] The enclosure injection molding device of this embodiment, as Figures 1 to 4As shown in the figure, it includes a mold 1 and an injection head 2, and the mold 1 is located below the injection head 2. For other supporting components, such as a barrel for melting plastic raw materials and a conveying mechanism for conveying the plastic in the barrel to the injection head, any existing technology can be adopted.

[0035] The injection head 2 of this embodiment includes a feed conveying pipe 21, a material distribution barrel 22, and an adjusting sleeve 23. One end of the material distribution barrel 22 is connected to the feed conveying pipe 21, and the other end is sealed. The adjusting sleeve 23 is rotatably sleeved outside the material distribution barrel 22 and is in sealed cooperation with the material distribution barrel 22. The adjusting sleeve 23 is connected with a first rotation driving mechanism 24. A vertical first injection pipe 25 is arranged at the bottom of the adjusting sleeve 23, and a vertical second injection pipe 26 is arranged at the top. A feed inlet 27 is arranged at the bottom of the material distribution barrel 22, and the feed inlet 27 is communicated with the first injection pipe 25. A cleaning mechanism is arranged above the second injection pipe 26.

[0036] The feed conveying pipe 21 is connected with the conveying mechanism. After the plastic raw materials are melted by the barrel, they are conveyed by the conveying mechanism through the feed conveying pipe 21 into the material distribution barrel 22. The material distribution barrel 22 is a circular cylinder or a disk body, fixedly installed, and its center line is in a horizontal state. The adjusting sleeve 23 is a circular sleeve, and the adjusting sleeve 23 is in clearance fit with the material distribution barrel 22, so that the first rotation driving mechanism 24 can drive the adjusting sleeve 23 to rotate. The first rotation driving mechanism 24 can adopt a servo motor and is connected with the adjusting sleeve 23 through a gear or a belt. It is sleeved outside the material distribution barrel 22 and is in sealed cooperation with the material distribution barrel 22 to prevent the molten plastic material from entering the fitting gap between the two.

[0037] The first injection pipe 25 and the second injection pipe 26 are used to inject plastic into the mold 1. The first injection pipe 25 and the second injection pipe 26 are coaxial and are respectively located on both sides of the adjusting sleeve 23, that is, when the first injection pipe 25 is located at the bottom of the adjusting sleeve 23, the second injection pipe 26 is located at the top of the adjusting sleeve 23. When the first injection pipe 25 is communicated with the feed inlet 27, the second injection pipe 26 is not communicated with the inner cavity of the material distribution barrel 22; when the second injection pipe 26 rotates to the bottom of the adjusting sleeve 23 along with the adjusting sleeve 23, the second injection pipe 26 is communicated with the feed inlet 27, and the first injection pipe 25 is not communicated with the inner cavity of the material distribution barrel 22.

[0038] The cleaning mechanism can clean the plastic residues on the inner walls of the first injection pipe 25 and the second injection pipe 26. When the first injection pipe 25 moves to the top of the material distribution barrel 22, the cleaning mechanism cleans the first injection pipe 25. When the second injection pipe 26 moves to the top of the material distribution barrel 22, the cleaning mechanism cleans the second injection pipe 26.

[0039] The working process of the present invention is as follows: When the first injection tube 25 is at the bottom of the adjusting sleeve 23, the molten plastic inside the material distribution cylinder 22 enters the first injection tube 25 through the feed port 27. The first injection tube 25 is docked with the mold 1, so as to inject the molten plastic into the mold 1. After the plastic injection is completed, the first injection tube 25 disengages from the mold 1. The first rotation driving mechanism 24 drives the adjusting sleeve 23 to rotate 180 degrees. The first injection tube 25 moves to the top of the adjusting sleeve 23 along with the adjusting sleeve 23, while the second injection tube 26 moves to the bottom of the adjusting sleeve 23 along with the adjusting sleeve 23. At this time, the first injection tube 25 is located below the cleaning mechanism, and the cleaning mechanism can clean the residual and cooled and solidified plastic inside the first injection tube 25. The second injection tube 26 is communicated with the feed port 27, and the molten plastic can be injected into the next mold 1 by using the second injection tube 26.

[0040] It can be seen that by providing the first injection tube 25 and the second injection tube 26 whose positions can be interchanged, the first injection tube 25 and the second injection tube 26 can alternately inject and alternately clean, ensuring the production efficiency and being particularly suitable for mass production.

[0041] The cleaning mechanism can adopt the existing technology. For example, a high-pressure air gun is used to blow air into the first injection tube 25 or the second injection tube 26, and the residual plastic adhered to the inner wall of the first injection tube 25 or the second injection tube 26 is blown away by the high-pressure air flow. However, it is difficult to clean the residual plastic sufficiently. As a preferred embodiment of the present invention, the cleaning mechanism includes a first lifting mechanism 28. The first lifting mechanism 28 can be a conventional device such as a cylinder or a hydraulic cylinder. A mounting seat 29 is provided at the lower end of the first lifting mechanism 28. A cleaning motor 210 and a gas supply mechanism 211 are provided on the lower surface of the mounting seat 29. The cleaning motor 210 is connected with a vertical cleaning shaft 212. Vertical scraping blades 213 are provided on the outer wall of the cleaning shaft 212. The scraping blades 213 can be two or three and are evenly distributed on the outer wall of the cleaning shaft 212. The length of the scraping blades 213 is greater than or equal to the depth adaptation of the first injection tube 25 and the second injection tube 26, ensuring that the scraping blades 213 can clean the entire inner wall of the first injection tube 25 and the second injection tube 26. The cleaning shaft 212 is a hollow shaft, and a rotary joint 214 is provided at the upper end of the inner hole of the cleaning shaft 212. The rotary joint 214 is rotationally matched with the cleaning shaft 212, that is, when the cleaning shaft 212 rotates, the rotary joint 214 can remain fixed. The rotary joint 214 is connected with the gas supply mechanism 211 through a hose 215. The gas supply mechanism 211 can adopt an air pump or the like for supplying gas to the cleaning shaft 212.

[0042] The cleaning process of the present invention is as follows: The first lifting mechanism 28 drives the mounting seat 29 to move downward, so that the cleaning shaft 212 extends into the first injection molding pipe 25 or the second injection molding pipe 26. After the cleaning shaft 212 extends into the first injection molding pipe 25 or the second injection molding pipe 26, the side of the scraping blade 213 can contact the inner wall of the first injection molding pipe 25 or the second injection molding pipe 26. Then, the cleaning motor 210 drives the cleaning shaft 212 to rotate, and the cleaning shaft 212 drives the scraping blade 213 to rotate, and the scraping blade 213 can scrape off the plastic residues on the inner wall of the first injection molding pipe 25 or the second injection molding pipe 26. At the same time, the air supply mechanism 211 supplies air to the cleaning shaft 212. The lower end of the cleaning shaft 212 extends into the bottom of the first injection molding pipe 25 or the second injection molding pipe 26, and under the action of the air flow, the scraped solidified plastic is blown out.

[0043] The cleaning mechanism of the present invention can fully remove the plastic residues on the inner walls of the first injection molding pipe 25 and the second injection molding pipe 26.

[0044] After the gas blows out the residual plastic, in order to collect the plastic and prevent the plastic residues from moving disorderly, an installation frame 216 is arranged on the lower surface of the mounting seat 29 of the present invention. The cleaning shaft 212 is installed on the installation frame 216, which can improve the stability of the cleaning shaft 212 during movement. The cleaning motor 210 is connected to the cleaning shaft 212 through a transmission component, and the transmission component can be common transmission parts such as gears and belts. The scraping blade 213 is arranged on the outer wall of the lower part of the cleaning shaft 212. A positioning disk 217 is fixedly arranged on the outer wall of the cleaning shaft 212 above the scraping blade 213. The positioning disk 217 is a disk. An inner sleeve 218 and an outer sleeve 219 are fixedly arranged on the lower surface of the positioning disk 217. The inner sleeve 218 is located inside the inner wall of the outer sleeve 219, and the cleaning shaft 212, the inner sleeve 218 and the outer sleeve 219 are coaxial. The inner diameter of the inner sleeve 218 is adapted to the outer diameters of the first injection molding pipe 25 and the second injection molding pipe 26 to ensure that the first injection molding pipe 25 and the second injection molding pipe 26 can be inserted into the inner sleeve 218. A waste collection cavity 221 is arranged between the inner sleeve 218 and the outer sleeve 219. A bottom plate 220 is arranged at the lower end of the waste collection cavity 221. A waste inlet 222 is arranged at the top of the inner sleeve 218. A plurality of exhaust holes are arranged on the positioning disk 217 at the top of the waste collection cavity 221.

[0045] When cleaning the first injection molding pipe 25 or the second injection molding pipe 26, the upper port of the first injection molding pipe 25 or the second injection molding pipe 26 extends into the inner sleeve 218 and is in clearance fit with the inner sleeve 218. The plastic residues blown out by the gas enter the waste collection cavity 221 through the waste inlet 222. The air in the waste collection cavity 221 is discharged through the exhaust holes, while the plastic residues stay in the waste collection cavity 221 to realize the collection of the plastic residues.

[0046] To facilitate the cleaning of the plastic in the waste collection chamber 221, the bottom plate 220 can be detachably installed, for example, threadedly connected to the inner sleeve 218 or the outer sleeve 219.

[0047] To keep the plastic in the material distribution cylinder 22 at an appropriate temperature and prevent the plastic in the material distribution cylinder 22 from cooling down and affecting the injection molding performance, a heating mechanism 223 is provided in the material distribution cylinder 22. The heating mechanism 223 can be a heating wire. A heat insulation layer is provided outside the adjusting sleeve 23, and a conventional heat insulation material can be used for the heat insulation layer.

[0048] Embodiment 2

[0049] This embodiment is as Figure 5 shown, and includes the injection molding head 2 of Embodiment 1. To facilitate the docking of the mold 1 with the first injection pipe 25 or the second injection pipe 26, so that the first injection pipe 25 or the second injection pipe 26 injects the molten plastic into the mold 1, the mold 1 of this embodiment is installed on the lifting seat 11, and the lifting seat 11 is connected with a second lifting mechanism 12. The second lifting mechanism 12 can be devices such as a cylinder or a hydraulic cylinder.

[0050] During injection molding, the second lifting mechanism 12 pushes the mold 1 upward, and the mold 1 can be docked with the first injection pipe 25 or the second injection pipe 26; after injection molding is completed, the second lifting mechanism 12 pushes the mold 1 downward, and the first injection pipe 25 or the second injection pipe 26 is separated from the mold 1.

[0051] Embodiment 3

[0052] The conventional molds used for plastic sheet injection molding are usually vertically and fixedly arranged, and are injected from the top of the mold inward. The cavity of the mold is filled by using the injection pressure and the gravity of the plastic itself. This method has low efficiency, and because the thickness of the surrounding plate is small, it is difficult for the plastic material to evenly fill the cavity, affecting the strength of the surrounding plate. Since a large injection pressure is required to make the molten plastic fill the cavity, there must be good sealing between the injection molding head and the gate to prevent the molten plastic from leaking out through the gate, increasing the injection molding difficulty.

[0053] To achieve rapid injection and prompt the plastic to quickly fill the cavity, this embodiment is as Figure 6As shown, it includes a mold 1 and an injection head 2. The injection head 2 is the same as that in the first embodiment. The mold 1 of this embodiment includes a stationary mold 13 arranged horizontally and a movable mold 14 arranged above the stationary mold 13. The upper surface of the stationary mold 13 is provided with a cavity 15. The depth of the cavity 15 is greater than the thickness of the enclosure to be manufactured. The lower surface of the movable mold 14 is provided with a core 16 that slidably cooperates with the cavity 15. The movable mold 14 is provided with a gate 17 that penetrates the movable mold 14. The diameter of the gate 17 is adapted to the outer diameter of the first injection pipe 25 or the second injection pipe 26. The side wall of the cavity 15 is provided with a plurality of exhaust grooves 18 extending downward from the top of the side wall. The distance from the lower end of the exhaust groove 18 to the bottom wall of the cavity 15 is equal to the thickness of the enclosure. The exhaust groove 18 is used to discharge the air in the cavity 15 during injection molding to prevent bubbles from being generated in the plastic enclosure and ensure that the plastic can fill the entire cavity 15. The movable mold 14 is connected to a third lifting mechanism 19. During the downward movement of the movable mold 14, when the lower surface of the movable mold 14 reaches the upper surface of the stationary mold 13, the distance from the lower surface of the core 16 to the bottom surface of the cavity 15 is equal to the thickness of the enclosure.

[0054] During injection molding, first use the third lifting mechanism 19 to drive the movable mold 14 to move upward. The gate 17 moves upward with the movable mold 14. When the first injection pipe 25 or the second injection pipe 26 passes through the gate 17, it stops moving upward. At this time, the lower part of the core 16 is in the cavity 15. The height of the cavity 15 is greater than the height of the prepared enclosure, and the volume of the cavity 15 is relatively large. Then use the first injection pipe 25 or the second injection pipe 26 to quickly inject molten plastic into the cavity 15. When the injection amount reaches the set amount, stop injecting, and use the third lifting mechanism 19 to drive the movable mold 14 to move downward, so that the first injection pipe 25 or the second injection pipe 26 is separated from the gate 17. When the first injection pipe 25 or the second injection pipe 26 is separated from the gate 17, a plug can be manually inserted into the gate 17 to seal the gate 17. During the downward movement of the core 16, it will contact the molten plastic and gradually squeeze the molten plastic, so that the molten plastic quickly and evenly fills the cavity 15. During the squeezing process, the air in the cavity 15 is discharged through the exhaust groove 18. When the lower surface of the movable mold 14 reaches the upper surface of the stationary mold 13, the movable mold 14 stops moving downward, and the exhaust groove 18 is covered by the core 16, thus disconnecting the connection with the cavity 15. At this time, the depth of the cavity 15 is consistent with the required thickness of the enclosure, that is, the required enclosure is obtained.

[0055] During the injection molding of the present invention, by increasing the depth of the cavity 15 and expanding the volume of the cavity 15, a larger flow rate can be used for injection during injection, saving injection time. Moreover, by using the mold core 16 to extrude the molten plastic, the molten plastic can be filled into the cavity 15 faster and more evenly, ensuring the quality of the shroud. After increasing the depth of the cavity 15, the set injection volume is less than the volume of the cavity 15 during injection. When the injection amount reaches the set amount, the plastic in the cavity 15 is located below the gate 17 and will not enter the gate 17. Therefore, there is no need to maintain a seal between the gate 17 and the first injection pipe 25 or the second injection pipe 26, and plastic leakage can also be prevented, thereby simplifying the structures of the first injection pipe 25 and the second injection pipe 26.

[0056] In this embodiment, a horizontal positioning plate 110 is provided on the bottom wall side wall of the moving mold 14. A vertical guide shaft 111 is provided on the upper surface of the positioning plate 110. The guide shaft 111 penetrates through the moving mold 14 and is slidably engaged with the moving mold 14. The guide shaft 111 plays a role in guiding and positioning to ensure that the moving mold 14 and the fixed mold 13 can be accurately clamped.

[0057] In this embodiment, the third lifting mechanism 19 uses a cylinder or a hydraulic cylinder and is installed on the positioning plate 110.

[0058] Embodiment Four

[0059] After injecting the molten plastic into the mold 1, it is necessary to cool down the mold 1 to solidify the plastic and then demold it. To further improve production efficiency and synchronize multiple steps such as injection molding, cooling, and demolding, as shown in this embodiment Figures 7 to 13 In the shown figure, on the basis of Embodiment Three, a turntable 3 is added. The turntable 3 can be installed on the frame through a plain bearing. The turntable 3 is connected with a third rotation driving mechanism 31. The third rotation driving mechanism 31 can be a reduction motor for driving the turntable 3 to rotate. To reduce the weight of the turntable 3, the turntable 3 can be annular. Above the turntable 3, an injection molding station, a plugging and extrusion station, and a cooling and demolding station are arranged in sequence along its rotation direction. Molds 1 are arranged at the injection molding station, the plugging and extrusion station, and the cooling and demolding station. The injection head 2 is located at the injection molding station for injecting molten plastic into the mold 1. A fifth lifting mechanism 224 is arranged at the plugging and extrusion station. A plug 113 is arranged at the lower end of the fifth lifting mechanism 224. At the plugging and extrusion station, the gate 17 of the mold 1 after injection is blocked by the plug 113 to prevent the plastic from entering the gate 17 when the mold core 16 extrudes the plastic, ensuring a smooth-surfaced shroud. Then, the plastic is extruded. A cooling mechanism is arranged at the cooling and demolding station for cooling down the mold 1 to solidify the internal plastic and then demolding it.

[0060] After the injection molding of the mold 1 at the injection molding station is completed, the third rotation drive mechanism 31 drives the turntable 3 to rotate a certain angle, conveying the mold 1 to the plugging and extrusion station. The fifth lifting mechanism 224 drives the plug 113 to move downward. The plug 113 enters the gate 17 to close the gate 17. After the gate 17 is closed, the lower end surface of the plug 113 is flush with the lower surface of the mold core 16. Then, the fifth lifting mechanism 224 continues to apply a downward thrust to push the plug 113 and the moving mold 14 to move downward synchronously, so that the mold core 16 extrudes the molten plastic. After the extrusion is completed, the fifth lifting mechanism 224 disengages from the plug 113 and moves upward, and the plug 113 stays in the gate 17. Then, the third rotation drive mechanism 31 drives the turntable 3 to rotate by a certain angle again, conveying the mold 1 to the cooling and demolding station, where it is cooled by the cooling mechanism and then demolded. After demolding, the plug 113 can be removed, and the mold 1 is conveyed back to the injection molding station for reuse.

[0061] During the operation of this embodiment, the third rotation drive mechanism 31 drives the turntable 3 to rotate. The turntable 3 sequentially conveys each mold 1 to the injection molding station, the plugging and extrusion station, and the cooling and demolding station. Each mold 1 can be sequentially injection molded, plugged and extruded, and cooled and demolded to obtain the side plate. While injection molding is carried out at the injection molding station, plugging and extrusion can be carried out at the plugging and extrusion station, and cooling and demolding can be carried out at the cooling and demolding station. Each process is carried out simultaneously, improving production efficiency.

[0062] The plug 113 can be manually installed on the fifth lifting mechanism 224. To facilitate the quick installation of the plug 113 on the fifth lifting mechanism 224 and to facilitate the separation of the plug 113 from the fifth lifting mechanism 224 after extrusion, a circular or rectangular first support groove 117 is provided at the upper port of the gate 17. Strip-shaped limiting plates 114 are provided on both side walls of the upper end of the plug 113. Magnetic attraction blocks 115 are fixedly arranged on the upper surfaces of the limiting plates 114. An electromagnet 116 is arranged at the lower end of the fifth lifting mechanism 224. After the electromagnet 116 is energized, it generates magnetic force and can fix the magnetic attraction block 115 through magnetic attraction. After extrusion is completed, the electromagnet 116 is powered off and the magnetic attraction disappears, and the plug 113 stays in the gate 17. The first support groove 117 and the limiting plates 114 play a role in limiting and transmitting pressure. When the limiting plates 114 enter the first support groove 117, the bottom of the first support groove 117 supports the limiting plates 114 to ensure that the lower end surface of the plug 113 is flush with the lower surface of the mold core 16. When the fifth lifting mechanism 224 continues to apply pressure, the pressure is transmitted to the moving mold 14 through the limiting plates 114, pushing the moving mold 14 to move downward to extrude the plastic. During the extrusion process, the third lifting mechanism 19 contracts downward. In this embodiment, the third lifting mechanism 19 is used to push the moving mold 14 upward, and the extrusion process is completed by the fifth lifting mechanism 224.

[0063] In this embodiment, the cooling mechanism includes a water tank 32 disposed below the turntable 3. Cooling water is stored in the water tank 32. A water spray network 33 is arranged above the water tank 32. The water spray direction of the water spray network 33 is upward, and the water tank 32 is connected to the water spray network 33 through a water pipe 34. A water pump 35 is arranged on the water pipe 34. Cooling holes 36 are provided on the turntable 3, and the fixed mold 13 covers the cooling holes 36. During cooling, the water pump 35 conveys the cooling water in the water tank 32 to the water spray network 33. The water spray network 33 sprays water upward. The cooling water sprays onto the lower surface of the fixed mold 13 after passing through the cooling holes 36, cooling the fixed mold 13, and further cooling the surrounding plate inside the fixed mold 13. The sprayed cooling water can fall back into the water tank 32 under the action of its own weight.

[0064] During the cooling process, the temperature of the molten plastic decreases. According to the principle of thermal expansion and contraction, the plastic gradually shrinks, thus separating from the mold 1. In this embodiment, since the cooling water sprays onto the lower surface of the fixed mold 13, the lower surface of the surrounding plate will cool and shrink first and separate from the fixed mold 13, while the upper surface of the surrounding plate cannot quickly separate from the lower surface of the mold core 16. To improve the demolding efficiency and promote the separation of the upper surface of the surrounding plate from the mold core 16, two strip-shaped second support grooves 118 are provided at the bottom of the first support groove 117 in this embodiment. The shape and size of the second support groove 118 are adapted to the limiting plate 114, and the second support groove 118 extends radially to the gate 17. A cross groove 119 is provided on the upper surface of the magnetic attraction block 115. A fourth lifting mechanism 120 is arranged at the cooling and demolding station. The fourth lifting mechanism 120 can be components such as a cylinder or a hydraulic cylinder. An adjustment motor 121 is arranged at the lower end of the fourth lifting mechanism 120, and a cross-shaped transmission head 122 adapted to the cross groove 119 is arranged at the lower end of the main shaft of the adjustment motor 121.

[0065] After cooling for a period of time, the fourth lifting mechanism 120 can drive the cross-shaped transmission head 122 to move downward to the surface of the magnetic block 115, and the cross-shaped transmission head 122 enters the cross groove 119, and the fourth lifting mechanism 120 continues to apply a certain pressure to the cross-shaped transmission head 122. Then, the cross-shaped transmission head 122 is driven by the adjusting motor 121 to rotate the set angle, and the entire plug 113 and the limit plate 114 are driven to rotate the set angle, so that the limit plate 114 is aligned with the second support groove 118. At this time, the plug 113 continues to move downward under the pressure of the fourth lifting mechanism 120, and the limit plate 114 enters the second support groove 118. When the plug 113 moves downward, the lower end of the plug 113 applies a thrust to the enclosure, causing the enclosure to separate from the mold core 16. Finally, open the mold 1 and take out the enclosure. In order to ensure that the cross-shaped transmission head 122 can be aligned with the cross groove 119 and to prevent the limit plate 114 from entering the second support groove 118 during blocking and extrusion, a pair of vertical positioning columns can be set on the upper surface of the plug 113, and a pair of positioning holes can be set on the lower surface of the fifth lifting mechanism 224. When the plug 113 is connected to the fifth lifting mechanism 224, the positioning columns are inserted into the positioning holes to circumferentially position the plug 113, ensuring that the limit plate 114 is staggered from the second support groove 118, and when the plug 113 is rotated to a set angle, the limit plate 114 can be aligned with the second support groove 118.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A panel injection molding device, comprising a mold (1) and an injection molding head (2), characterized in that: The injection head (2) comprises a feed conveying pipe (21), a material distribution barrel (22) and an adjusting sleeve (23); one end of the material distribution barrel (22) is connected to the feed conveying pipe (21) and the other end is sealed; the adjusting sleeve (23) is rotatably sleeved outside the material distribution barrel (22) and is sealed with the material distribution barrel (22); the adjusting sleeve (23) is connected to a first rotating drive mechanism (24); a vertical first injection tube (25) is arranged at the bottom of the adjusting sleeve (23), and a vertical second injection tube (26) is arranged at the top; a feed port (27) is arranged at the bottom of the material distribution barrel (22), and the feed port (27) is connected to the first injection tube (25); a cleaning mechanism is arranged above the second injection tube (26).

2. The panel injection molding device according to claim 1, characterized in that: The cleaning mechanism comprises a first lifting mechanism (28), a mounting seat (29) is arranged at the lower end of the first lifting mechanism (28), a cleaning motor (210) and an air supply mechanism (211) are arranged on the lower surface of the mounting seat (29), the cleaning motor (210) is connected to a vertical cleaning shaft (212), and a vertical scraper (213) is arranged on the outer wall of the cleaning shaft (212); the cleaning shaft (212) is a hollow shaft, and a rotary joint (214) is arranged at the upper end of the inner hole of the cleaning shaft (212), and the rotary joint (214) is connected to the air supply mechanism (211) through a hose (215).

3. The panel injection molding device according to claim 2, characterized in that: A mounting frame (216) is provided on the lower surface of the mounting seat (29), the cleaning shaft (212) is mounted on the mounting frame (216), and the cleaning motor (210) is connected to the cleaning shaft (212) via a transmission assembly; a positioning plate (217) is fixedly provided on the outer wall of the cleaning shaft (212) above the scraper (213), and an inner sleeve (218) and an outer sleeve (219) are provided on the lower surface of the positioning plate (217). The inner diameter of the inner sleeve (218) is adapted to the outer diameters of the first injection tube (25) and the second injection tube (26); a waste collection chamber (221) is provided between the inner sleeve (218) and the outer sleeve (219); a bottom plate (220) is provided at the lower end of the waste collection chamber (221); a waste inlet (222) is provided at the top of the inner sleeve (218); and a plurality of exhaust holes are provided on the positioning plate (217) at the top of the waste collection chamber (221).

4. The panel injection molding device according to claim 1, characterized in that: A heating mechanism (223) is arranged inside the material distribution barrel (22), and a heat-insulating layer is arranged outside the regulating sleeve (23).

5. The panel injection molding device according to claim 1, characterized in that: The mold (1) is installed on a lifting seat (11), and the lifting seat (11) is connected to a second lifting mechanism (12).

6. The panel injection molding device according to claim 1, characterized in that: The mold (1) comprises a horizontally arranged fixed mold (13) and a movable mold (14) arranged above the fixed mold (13); a mold cavity (15) is arranged on the upper surface of the fixed mold (13); a mold core (16) slidably matched with the mold cavity (15) is arranged on the lower surface of the movable mold (14); a gate (17) penetrating the movable mold (14) is arranged on the movable mold (14); a plurality of exhaust grooves (18) extending downward from the top of the side wall are arranged on the side wall of the mold cavity (15); the distance from the lower end of the exhaust groove (18) to the bottom wall of the mold cavity (15) is equal to the thickness of the surrounding plate; the movable mold (14) is connected to a third lifting mechanism (19); when the lower surface of the movable mold (14) reaches the upper surface of the fixed mold (13) during the downward movement of the movable mold (14), the distance from the lower surface of the mold core (16) to the bottom surface of the mold cavity (15) is equal to the thickness of the surrounding plate.

7. The panel injection molding device according to claim 6, characterized in that: A horizontal positioning plate (110) is provided on the side wall of the bottom wall of the movable mold (14); a vertical guide shaft (111) is provided on the upper surface of the positioning plate (110); the guide shaft (111) passes through the movable mold (14) and is slidably matched with the movable mold (14); and a third lifting mechanism (19) is installed on the positioning plate (110).

8. The panel injection molding device according to claim 6, characterized in that: The invention also comprises a turntable (3), wherein the turntable (3) is connected to a third rotation drive mechanism (31), and an injection molding station, a plugging and extrusion station and a cooling and demolding station are sequentially arranged above the turntable (3) along its rotation direction, wherein the injection molding station, the plugging and extrusion station and the cooling and demolding station are all provided with a mold (1), the plugging and extrusion station is provided with a fifth lifting mechanism (224), and a plug (113) is provided at the lower end of the fifth lifting mechanism (224), and the cooling and demolding station is provided with a cooling mechanism.

9. The panel injection molding device according to claim 8, characterized in that: The upper end of the gate (17) is provided with a circular or rectangular first supporting groove (117), the upper side walls of the plug (113) are provided with strip-shaped limiting plates (114), the upper surface of the limiting plate (114) is fixedly provided with a magnetic attraction block (115), and the lower end of the fifth lifting mechanism (224) is provided with an electromagnet (116); The bottom of the first supporting groove (117) is provided with two strip-shaped second supporting grooves (118), the second supporting grooves (118) extend radially to the gate (17), and the second supporting grooves (118) are adapted to the limit plate (114); the upper surface of the magnetic block (115) is provided with a cross groove (119); the cooling and demoulding station is provided with a fourth lifting mechanism (120), the lower end of the fourth lifting mechanism (120) is provided with an adjusting motor (121), and the lower end of the main shaft of the adjusting motor (121) is provided with a cross-shaped transmission head (122) adapted to the cross groove (119).

10. The enclosure panel injection molding device according to claim 8 or 9, characterized in that: The cooling mechanism comprises a water tank (32) arranged below the turntable (3); a water spraying pipe network (33) is arranged above the water tank (32); the water spraying direction of the water spraying pipe network (33) is upward; the water tank (32) is connected to the water spraying pipe network (33) through a water pipe (34); a water pump (35) is arranged on the water pipe (34); a cooling hole (36) is arranged on the turntable (3); and the fixed mold (13) covers the cooling hole (36).

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