Efficient PETG label injection molding equipment

Abstract

The invention relates to the technical field of injection molding equipment, and discloses PETG label efficient injection molding equipment which comprises a base, and the base is a basic supporting part of the equipment; the sliding door is arranged on the base, and the sliding door is used for achieving opening and closing operation of the equipment; the operation panel is arranged on the base, and the operation panel is an interface used for controlling and monitoring equipment operation; the movable mold mechanism is arranged on the base, and the movable mold mechanism is used for driving a mold of the injection molding machine to correspondingly move; and the injection molding mechanism is arranged at the top of the base. According to the efficient injection molding equipment for the PETG labels, the circulating mechanism is arranged, and through reciprocating circulation of the threaded extrusion rod, it is ensured that molten materials always keep stable temperature and fluidity in the injection molding process, temperature reduction and solidification of the molten materials caused by heating pause are avoided, and therefore the molding precision is improved, and the subsequent molding quality problem is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and particularly to an efficient injection molding equipment for PETG labels. Background Art

[0002] PETG (polyethylene terephthalate glycol) is a commonly used thermoplastic. Due to its excellent transparency, mechanical properties, and chemical resistance, it is widely used in the packaging, labeling, and equipment of various products. For battery labels, the PETG material has high transparency, which can provide a clear view, which is very beneficial for displaying battery information (such as battery type, capacity, production date, brand, etc.). At the same time, the PETG material can resist the erosion of certain degrees of grease, solvents, acids, alkalis, etc., and is suitable for products such as batteries that may be exposed to various environments.

[0003] The efficient injection molding equipment for PETG labels is an injection molding machine specifically designed for producing PETG (polyethylene terephthalate glycol) labels. In the traditional injection molding process, the injection molding machine needs to pause heating during the cooling and solidification stages after filling. At this time, after the molten plastic is injected into the mold and the molding is completed, the injection molding machine will pause heating to avoid overheating or overreacting of the molten material. Overheating will cause the temperature of the molten material to be too high, which will not only change the physical properties of the molten material, but may also cause its decomposition or degradation. However, during this process of pausing heating, the temperature of the molten plastic in the barrel gradually decreases, resulting in the gradual solidification of the molten material and a significant reduction in fluidity. This solidification phenomenon directly affects the subsequent injection molding quality, resulting in rough surfaces, inaccurate dimensions, and even defects such as bubbles and cracks in the products. When the injection molding machine restarts, not only does it take extra time to heat the barrel and the molten material to the appropriate processing temperature, but it also needs to melt the partially solidified molten material, increasing energy consumption and time waste, and thus reducing the overall production efficiency. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides an efficient injection molding equipment for PETG labels, which solves the problems that in the traditional injection molding process, pausing heating causes the temperature of the molten material to drop and gradually solidify, affecting the subsequent molding quality, increasing the heating time and energy consumption, and reducing the production efficiency.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: An efficient injection molding device for PETG labels, including a base, which is the basic support part of the device; a sliding door, which is arranged on the base and is used to realize the opening and closing operation of the device; an operation panel, which is arranged on the base and is the interface for controlling and monitoring the operation of the device; a moving mold mechanism, which is arranged on the base and is used to drive the mold of the injection molding machine to perform corresponding movements; an injection molding mechanism, which is arranged on the top of the base and is the core part of the entire injection molding device; a circulation mechanism, which is arranged on the injection molding mechanism and is used to make the molten material circulate; a cooling mechanism, which is arranged on the injection molding mechanism and is used to cool the mold after injection molding; a negative feedback mechanism, which is arranged on the injection molding mechanism and is used to stop the feeding when the molten material circulates.

[0008] Preferably, the moving mold mechanism includes a fixed vertical plate, which is fixedly connected to the top of the base. An air pump is fixedly connected to the outer wall of the fixed vertical plate, and a telescopic cylinder is fixedly connected to the outer wall of the fixed vertical plate. The output end of the telescopic cylinder is fixedly connected to a moving mold table, and a moving mold plate is fixedly connected to the outer wall of the moving mold table.

[0009] Preferably, the injection molding mechanism includes a fixed support frame, the bottom of which is fixedly connected to the top of the base. A heating cylinder is fixedly connected to the inner wall of the fixed support frame, a material cylinder is fixedly connected to the inner wall of the heating cylinder, a feeding port is arranged at the top of the material cylinder, and a static mold plate is fixedly connected to the outer wall of the material cylinder.

[0010] Preferably, the circulation mechanism includes a stepping motor, which is fixedly connected to the top of the base. The output shaft of the stepping motor is fixedly connected to a hollow disc. A threaded extrusion rod is fixedly connected to the outer wall of the hollow disc. A through groove is opened on the inner wall of the threaded extrusion rod. A fixed block is fixedly connected to the through groove of the threaded extrusion rod. A telescopic rod is fixedly connected to the outer wall of the fixed block. One side of the telescopic rod away from the fixed block is fixedly connected to a pressing disc. A return spring is fixedly connected to the inner wall of the telescopic rod. A fixed ring is fixedly connected to the through groove of the threaded extrusion rod.

[0011] Preferably, the pressing disc is provided with a chamfer for facilitating the docking of the pressing disc with the fixed ring.

[0012] Preferably, the cooling mechanism includes a water inlet pipe disposed at the bottom of the static template. An outlet pipe is provided at the top of the static template. An injection port is provided on the barrel. A telescopic motor is provided on the base. The output end of the telescopic motor is fixedly connected to a U-shaped member. A long strip plate is fixedly connected to the outer wall of the U-shaped member. The outer wall of the long strip plate is piston-connected to the inner wall of the barrel.

[0013] Preferably, a disc block is fixedly connected to the top of the U-shaped member. A through hole is formed in the inner wall of the water inlet pipe. The outer wall of the disc block is piston-connected to the inner wall of the water inlet pipe.

[0014] Preferably, the negative feedback mechanism includes a positioning spring. One end of the positioning spring is fixedly connected to the inner wall of the hollow disc. The other end of the positioning spring is fixedly connected to a positioning ring. A guide rod is fixedly connected to the outer wall of the positioning ring. The guide rod is fixedly connected to an annular disc on the side away from the positioning ring. A semi-circular ring groove is formed in the inner wall of the hollow disc on the side close to the annular disc.

[0015] Preferably, the outer wall of the positioning ring is piston-connected to the inner wall of the hollow disc. The annular disc is piston-connected to the inner wall of the barrel. The outer wall of the guide rod is piston-connected to the inner wall of the hollow disc. The inner wall of the hollow disc is communicated with the inner wall of the threaded extrusion rod.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a high-efficiency injection molding device for PETG labels, having the following beneficial effects:

[0018] 1. For this high-efficiency injection molding device for PETG labels, by setting the circulation mechanism, through the reciprocating cycle of the threaded extrusion rod, it ensures that the molten material always maintains a stable temperature and fluidity during the injection process, avoiding the decrease in the temperature of the molten material and solidification caused by the suspension of heating, thereby improving the molding accuracy and avoiding subsequent molding quality problems.

[0019] 2. For this high-efficiency injection molding device for PETG labels, by setting the circulation mechanism, through the circulating flow of the molten material, the heating time and energy consumption are reduced, the heating process is optimized, the overall production efficiency is improved, and the waste of heating time caused by the solidification of the molten material in the traditional injection molding process is avoided.

[0020] 3. For this high-efficiency injection molding device for PETG labels, by setting the cooling mechanism, through the precise control of the cooling water, the heat in the mold is quickly removed, helping the molten plastic to quickly cool and solidify, ensuring the stability of the size and quality of the molded product. In addition, it avoids deformation of the plastic product or damage to the mold caused by excessive cooling.

[0021] 4. The high-efficiency injection molding equipment for PETG labels uses a negative feedback mechanism. The positioning ring realizes precise feeding control under the action of the negative feedback mechanism, avoiding excessive input of molten materials into the mold, preventing material overflow or waste, and ensuring the stability of the injection molding process and the material utilization rate. Description of the Drawings

[0022] Figure 1 Schematic diagram of the overall structure of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0023] Figure 2 Schematic diagram of the structure of the base of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0024] Figure 3 Schematic diagram of the structure of the moving mold mechanism of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0025] Figure 4 Schematic diagram of the structure of the injection molding mechanism of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0026] Figure 5 Schematic diagram of the cross-sectional structure of the barrel of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0027] Figure 6 Schematic diagram of the cross-sectional structure of the screw extrusion rod of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0028] Figure 7 Schematic diagram of the cross-sectional structure of the telescopic rod of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0029] Figure 8 Schematic diagram of the structure of the injection port of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0030] Figure 9 Schematic diagram of the cross-sectional structure of the water inlet pipe of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0031] Figure 10 Schematic diagram of the cross-sectional structure of the hollow disk of a high-efficiency injection molding equipment for PETG labels proposed by the present invention;

[0032] Figure 11 Schematic diagram of the structure of the semi-circular ring groove of a high-efficiency injection molding equipment for PETG labels proposed by the present invention.

[0033] In the figure: 1. Base; 2. Sliding door; 3. Operation panel; 4. Moving die mechanism; 41. Fixed vertical plate; 42. Air pump; 43. Telescopic cylinder; 44. Moving die table; 45. Moving die plate; 5. Injection molding mechanism; 51. Fixed support frame; 52. Heating cylinder; 53. Barrel; 54. Feeding port; 55. Static die plate; 6. Circulation mechanism; 61. Stepper motor; 62. Hollow disc; 63. Threaded extrusion rod; 64. Fixed block; 65. Telescopic rod; 66. Pressing disc; 67. Fixed ring; 68. Return spring; 7. Cooling mechanism; 71. Water inlet pipe; 72. Water outlet pipe; 73. Injection port; 74. Telescopic motor; 75. U-shaped part; 76. Long strip plate; 77. Disc block; 78. Through hole; 8. Negative feedback mechanism; 81. Positioning spring; 82. Positioning ring; 83. Guide rod; 84. Annular disc; 85. Semi-circular groove. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figure 1 - Figure 11, a high-efficiency injection molding device for PETG labels, includes a base 1. The base 1 is the basic support part of the device, providing a stable platform to carry and support other components of the device, ensuring the stability and safety of the device during operation; a sliding door 2, which is arranged on the base 1. The sliding door 2 is used to realize the opening and closing operation of the device, usually for adjusting the engagement and separation of the mold, facilitating the entry and exit of the mold as well as replacement or maintenance, ensuring the smooth progress of the production process; an operation panel 3, which is arranged on the base 1. The operation panel 3 is an interface for controlling and monitoring the operation of the device. Usually equipped with various control buttons, display screens and indicator lights, operators can set the working parameters of the device, start and stop the device, monitor the device status, etc. through the operation panel 3, ensuring the efficient operation of the device and the convenience of operation; a moving mold mechanism 4, which is arranged on the base 1. The moving mold mechanism 4 is used to drive the mold of the injection molding machine to perform corresponding movements, usually including operations such as the opening and closing of the mold, the engagement and separation of the mold parting surface, etc. The role of the moving mold mechanism 4 is to ensure that the mold can be opened and closed smoothly, realizing the precise contact between the mold and the molten material, so as to form a suitable product shape during the injection molding process. The precise movement of the moving mold mechanism 4 can also avoid mold damage, improve production efficiency and product quality; an injection mechanism 5, which is arranged on the top of the base 1. The injection mechanism 5 is the core part of the entire injection molding device. Its main role is to inject the molten plastic material into the mold cavity. During the injection molding process, the injection mechanism 5 makes the plastic melt maintain a flowing state at a suitable temperature through heating and pressure, ensuring that the plastic can completely fill the mold cavity; a circulation mechanism 6, which is arranged on the injection mechanism 5, is used to make the molten material flow in a cycle, solving the problem in the traditional injection molding process that pausing heating causes the temperature of the melt to drop and gradually solidify, affecting the subsequent molding quality, increasing the heating time and energy consumption, and reducing the production efficiency. By making the molten material maintain a cyclic flow during the injection molding process, ensuring that the temperature and fluidity of the melt remain stable, thus avoiding the melt affecting the molding quality due to too low temperature or solidification. This helps to improve the precision and quality of injection molding and improve the overall production efficiency; a cooling mechanism 7, which is arranged on the injection mechanism 5. The cooling mechanism 7 is used to cool the mold after the injection molding is completed, quickly reducing the temperature of the molten plastic in the mold, helping it to solidify and form. The cooling mechanism 7 can accelerate the entire injection molding cycle, shorten the production time, improve the production efficiency, and ensure that the final product has better dimensional accuracy and quality; a negative feedback mechanism 8, which is arranged on the injection mechanism 5. The negative feedback mechanism 8 is used to stop the feeding when the molten material is circulating. When the melt reaches the set flow rate, the feeding is automatically stopped, thus avoiding the melt overflow or waste caused by excessive feeding. This mechanism can achieve precise control of the feeding amount, ensure uniform filling of the melt during the injection molding process, and improve the material utilization rate.

[0036] The moving mold mechanism 4 includes a fixed vertical plate 41, which is fixedly connected to the top of the base 1. An air pump 42 is fixedly connected to the outer wall of the fixed vertical plate 41, and a telescopic cylinder 43 is also fixedly connected to the outer wall of the fixed vertical plate 41. The output end of the telescopic cylinder 43 is fixedly connected to a moving mold table 44, and a moving mold plate 45 is fixedly connected to the outer wall of the moving mold table 44. The main function of the moving mold mechanism 4 is to control the movement of the moving mold table 44 and the moving mold plate 45 through the air pump 42 and the telescopic cylinder 43, thereby realizing the opening and closing of the moving mold plate 45. The fixed vertical plate 41 plays a role of support and fixation, enabling the entire moving mold mechanism 4 to work stably. By controlling the expansion and contraction of the moving mold table 44, the telescopic cylinder 43 can precisely adjust the opening and closing speed and position of the moving mold plate 45, ensuring the accurate closing of the mold during the injection molding process. The air pump 42 provides power for the telescopic cylinder 43 to ensure that the moving mold mechanism 4 can respond quickly and execute the predetermined actions. As a part of the injection mold, the moving mold plate 45 cooperates with the stationary mold plate 55 to jointly form a mold cavity, carry and fix the injected molten material, and ensure the quality of the molded product.

[0037] The injection molding mechanism 5 includes a fixed support frame 51, the bottom of which is fixedly connected to the top of the base 1. A heating cylinder 52 is fixedly connected to the inner wall of the fixed support frame 51, and a feed cylinder 53 is fixedly connected to the inner wall of the heating cylinder 52. A feed inlet 54 is arranged at the top of the feed cylinder 53, and a stationary mold plate 55 is fixedly connected to the outer wall of the feed cylinder 53.

[0038] The circulation mechanism 6 includes a stepper motor 61. The stepper motor 61 is fixedly connected to the top of the base 1. The output shaft of the stepper motor 61 is fixedly connected with a hollow disc 62. The outer wall of the hollow disc 62 is fixedly connected with a screw extrusion rod 63. A through groove is formed on the inner wall of the screw extrusion rod 63. A fixing block 64 is fixedly connected to the through groove of the screw extrusion rod 63. The outer wall of the fixing block 64 is fixedly connected with a telescopic rod 65. One side of the telescopic rod 65 away from the fixing block 64 is fixedly connected with a pressing disc 66. A return spring 68 is fixedly connected to the inner wall of the telescopic rod 65. A fixing ring 67 is fixedly connected to the through groove of the screw extrusion rod 63. The return spring 68 drives the telescopic rod 65 to move in the extending direction, so that the telescopic rod 65 drives the pressing disc 66 to squeeze the fixing ring 67 for blocking. The circulation mechanism 6 is mainly used to control the flow and circulation of molten plastic during the injection molding process to ensure the uniform distribution and fluidity of the material. The stepper motor 61 drives the hollow disc 62 by precisely controlling the rotation of the output shaft, thereby driving the screw extrusion rod 63 to rotate to adjust the flow of the molten material and realize the pushing of the molten substance. The telescopic rod 65 generates pressure through the return spring 68 to push the pressing disc 66. The pressing disc 66 is used to squeeze the fixing ring 67 to block the flow path of the molten plastic. When the pressure at the position where the injection port 73 is located is too high, the molten substance squeezes the pressing disc 66, so that the molten substance enters the through groove of the screw extrusion rod 63 for reciprocating circulation. A chamfer is provided on the pressing disc 66 to facilitate the docking of the pressing disc 66 with the fixing ring 67.

[0039] The cooling mechanism 7 includes a water inlet pipe 71. The water inlet pipe 71 is arranged at the bottom of the stationary template 55. An outlet pipe 72 is arranged at the top of the stationary template 55. The water inlet pipe 71 and the outlet pipe 72 are used for the inlet and outlet circulation of cooling water. An injection port 73 is arranged on the barrel 53. A telescopic motor 74 is arranged on the base 1. The output end of the telescopic motor 74 is fixedly connected with a U-shaped part 75. The outer wall of the U-shaped part 75 is fixedly connected with a long strip plate 76. The outer wall of the long strip plate 76 is piston-connected to the inner wall of the barrel 53. The telescopic motor 74 drives the long strip plate 76 to move upward through the U-shaped part 75, so that the long strip plate 76 blocks the injection port 73, playing a role in opening and closing the injection port 73. A disc block 77 is fixedly connected to the top of the U-shaped part 75. A through hole 78 is formed on the inner wall of the water inlet pipe 71. The outer wall of the disc block 77 is piston-connected to the inner wall of the water inlet pipe 71. After the injection molding is completed, the telescopic motor 74 drives the U-shaped part 75 to drive the long strip plate 76 to move upward to close the injection port 73, avoiding the leakage or overflow of the molten plastic. The disc block 77 moves upward and no longer touches the through hole 78. The cooling water in the water inlet pipe 71 enters the stationary template 55 and is then discharged through the outlet pipe 72, playing a cooling role and providing an efficient cooling mechanism, which helps to improve the injection molding quality and production efficiency.

[0040] The negative feedback mechanism 8 includes a positioning spring 81. One end of the positioning spring 81 is fixedly connected to the inner wall of the hollow disc 62. The other end of the positioning spring 81 is fixedly connected with a positioning ring 82. The outer wall of the positioning ring 82 is fixedly connected with a guide rod 83. One side of the guide rod 83 away from the positioning ring 82 is fixedly connected with an annular disc 84. A semi-circular ring groove 85 is formed on the inner wall of the hollow disc 62 near the annular disc 84 for the output of the molten material. The outer wall of the positioning ring 82 is piston-connected to the inner wall of the hollow disc 62. The annular disc 84 is piston-connected to the inner wall of the barrel 53. The outer wall of the guide rod 83 is piston-connected to the inner wall of the hollow disc 62. The inner wall of the hollow disc 62 is communicated with the inner wall of the screw extrusion rod 63. The molten material enters the inner wall of the hollow disc 62 through the screw extrusion rod 63, and then presses the positioning ring 82. The positioning ring 82 compresses the positioning spring 81, so that the positioning ring 82 moves to the position where the semi-circular ring groove 85 is located, enabling the cyclic molten material in the hollow disc 62 to circulate again. And the positioning ring 82 drives the annular disc 84 through the guide rod 83, so that the annular disc 84 blocks the feeding port 54, and the feeding port 54 no longer inputs materials, avoiding excessive material input.

[0041] In summary, for this PETG label high-efficiency injection molding device, the PETG material is placed in the feeding port 54 and enters the barrel 53 through the barrel 53. The operator sets relevant parameters through the operation panel 3 to control the temperature, pressure, injection speed, etc., ensuring that the injection molding process meets the production requirements. During the injection molding process, the heating barrel 52 heats and melts the PETG material to make it in a molten state. The stepping motor 61 drives the hollow disc 62 and the screw extrusion rod 63 to rotate. The screw extrusion rod 63 drives the material and injects it into the mold cavity through the injection port 73. After the injection molding is completed, when the pressure at the part where the injection port 73 is located is too high, the molten material presses the pressing disc 66, so that the molten material enters the through groove of the screw extrusion rod 63 for reciprocating circulation, solving the problem in the traditional injection molding process that pausing heating causes the temperature of the molten material to drop and gradually solidify, affecting the subsequent molding quality, increasing the heating time and energy consumption, and reducing the production efficiency. By keeping the molten material circulating during the injection molding process, it ensures that the temperature and fluidity of the molten material remain stable, thus avoiding the molding quality being affected by too low temperature or solidification of the molten material, which helps to improve the precision and quality of injection molding and improve the overall production efficiency.

[0042] After injection molding is completed, the telescopic motor 74 drives the U-shaped part 75 to drive the long strip plate 76 to move upward, closing the injection port 73 to prevent molten plastic from leaking or overflowing. The disc block 77 moves upward and no longer abuts against the through hole 78. The cooling water in the water inlet pipe 71 enters the static template 55 and is then discharged through the water outlet pipe 72, playing a cooling role. When the telescopic motor 74 drives the U-shaped part 75 to drive the long strip plate 76 to move downward, the injection port 73 is opened. At this time, the disc block 77 moves downward, and the disc block 77 blocks the through hole 78 to stop cooling. When injection molding is completed, the long strip plate 76 closes the injection port 73, and then the cooling water can flow into the static template 55. The water inlet pipe 71 and the water outlet pipe 72 form a cooling water flow cycle. This process quickly takes away the heat in the mold, accelerating the cooling and solidification of the molten plastic and ensuring the stability of the size and quality of the molded product. When the long strip plate 76 moves downward and the injection port 73 is opened, the disc block 77 moves downward and blocks the through hole 78. At this time, the flow of cooling water is stopped. This design can prevent overcooling from affecting the injection molding cycle, ensure reasonable control of the cooling time during the production process, achieve the best cooling effect, and avoid mold damage or plastic product deformation caused by overcooling.

[0043] The molten material enters the inner wall of the hollow disc 62 through the threaded extrusion rod 63, and then presses against the positioning ring 82. The positioning ring 82 compresses the positioning spring 81, causing the positioning ring 82 to move to the position where the semi-circular ring groove 85 is located, enabling the circulating molten material in the hollow disc 62 to circulate again. And the positioning ring 82 drives the annular disc 84 through the guide rod 83, causing the annular disc 84 to block the feeding port 54, so that the feeding port 54 no longer inputs materials, avoiding excessive material input.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. An efficient injection molding device for PETG labels, characterized in that: including a base (1), which is the basic support part of the device; a sliding door (2), which is arranged on the base (1) and is used to realize the opening and closing operation of the device; an operation panel (3), which is arranged on the base (1) and is the interface for controlling and monitoring the operation of the device; a moving die mechanism (4), which is arranged on the base (1) and is used to drive the mold of the injection molding machine to perform corresponding movements; an injection molding mechanism (5), which is arranged on the top of the base (1) and is the core part of the entire injection molding device; a circulation mechanism (6), which is arranged on the injection molding mechanism (5) and is used to make the molten material circulate; a cooling mechanism (7), which is arranged on the injection molding mechanism (5) and is used to cool the mold after injection molding; a negative feedback mechanism (8), which is arranged on the injection molding mechanism (5) and is used to stop the feeding when the molten material circulates.

2. The high-efficiency injection molding equipment for PETG labels according to claim 1, characterized in that: The moving die mechanism (4) includes a fixed vertical plate (41), which is fixedly connected to the top of the base (1). An air pump (42) is fixedly connected to the outer wall of the fixed vertical plate (41), and a telescopic cylinder (43) is fixedly connected to the outer wall of the fixed vertical plate (41). The output end of the telescopic cylinder (43) is fixedly connected to a moving die table (44), and a moving die plate (45) is fixedly connected to the outer wall of the moving die table (44).

3. The high-efficiency injection molding equipment for PETG labels according to claim 1, wherein: The injection molding mechanism (5) includes a fixed support frame (51), the bottom of which is fixedly connected to the top of the base (1). A heating cylinder (52) is fixedly connected to the inner wall of the fixed support frame (51), a material cylinder (53) is fixedly connected to the inner wall of the heating cylinder (52), a feeding port (54) is arranged at the top of the material cylinder (53), and a static die plate (55) is fixedly connected to the outer wall of the material cylinder (53).

4. An efficient injection molding device for PETG labels according to claim 3, characterized in that: The circulation mechanism (6) includes a stepping motor (61), which is fixedly connected to the top of the base (1). The output shaft of the stepping motor (61) is fixedly connected to a hollow disc (62). A threaded extrusion rod (63) is fixedly connected to the outer wall of the hollow disc (62). A through groove is formed in the inner wall of the threaded extrusion rod (63). A fixed block (64) is fixedly connected to the through groove of the threaded extrusion rod (63). A telescopic rod (65) is fixedly connected to the outer wall of the fixed block (64). One side of the telescopic rod (65) away from the fixed block (64) is fixedly connected to a pressing disc (66). A return spring (68) is fixedly connected to the inner wall of the telescopic rod (65). A fixed ring (67) is fixedly connected to the through groove of the threaded extrusion rod (63).

5. An efficient injection molding device for PETG labels according to claim 4, characterized in that: The pressing disc (66) is provided with a chamfer for facilitating the docking of the pressing disc (66) with the fixed ring (67).

6. The high-efficiency injection molding equipment for PETG labels according to claim 4, characterized in that: The cooling mechanism (7) includes a water inlet pipe (71) which is arranged at the bottom of the stationary template (55). An outlet pipe (72) is arranged at the top of the stationary template (55). An injection port (73) is arranged on the barrel (53). A telescopic motor (74) is arranged on the base (1). The output end of the telescopic motor (74) is fixedly connected with a U-shaped member (75). The outer wall of the U-shaped member (75) is fixedly connected with a long strip plate (76). The outer wall of the long strip plate (76) is in piston connection with the inner wall of the barrel (53).

7. An efficient injection molding device for PETG labels according to claim 6, characterized in that: A disc block (77) is fixedly connected to the top of the U-shaped member (75). A through hole (78) is formed in the inner wall of the water inlet pipe (71). The outer wall of the disc block (77) is in piston connection with the inner wall of the water inlet pipe (71).

8. An efficient injection molding device for PETG labels according to claim 7, characterized in that: The negative feedback mechanism (8) includes a positioning spring (81). One end of the positioning spring (81) is fixedly connected to the inner wall of the hollow disc (62). The other end of the positioning spring (81) is fixedly connected with a positioning ring (82). A guide rod (83) is fixedly connected to the outer wall of the positioning ring (82). An annular disc (84) is fixedly connected to the side of the guide rod (83) away from the positioning ring (82). A semi-circular ring groove (85) is formed in the inner wall of the hollow disc (62) close to the annular disc (84).

9. An efficient injection molding device for PETG labels according to claim 8, characterized in that: The outer wall of the positioning ring (82) is in piston connection with the inner wall of the hollow disc (62). The annular disc (84) is in piston connection with the inner wall of the barrel (53). The outer wall of the guide rod (83) is in piston connection with the inner wall of the hollow disc (62). The inner wall of the hollow disc (62) is communicated with the inner wall of the screw extrusion rod (63).

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