Heating mechanism for injection molding of PET plastic bottle blank

Abstract

The utility model relates to the technical field of injection molding raw material processing, and discloses a heating mechanism for PET plastic bottle blank injection molding, which comprises a mixing barrel, the top of the rear side of the mixing barrel is fixedly connected with a motor, the output end of the motor is fixedly connected with a driving shaft, and the top of the outer wall of the driving shaft is fixedly connected with a first circular gear. The outer wall of the first circular gear is connected with a chain in a meshed mode, the other side of the chain is connected with a second circular gear in a meshed mode, the middle of the second circular gear is fixedly connected with a rotating shaft, and the bottom of the rotating shaft is fixedly connected with a rotating plate. According to the plastic raw material mixing device, the motor is started to output power to drive the driving shaft, the first circular gear, the driving chain, the second circular gear, the rotating shaft, the rotating plate, the rotating vertical rod and the mixing strips to rotate, so that plastic raw materials in the mixing barrel are stirred and mixed, the raw materials are uniformly heated in the heating cavity, and the phenomenon that local overheating or supercooling affects use is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection molding raw material processing technology, and in particular to a heating mechanism for injection molding of PET plastic bottle preforms. Background Technology

[0002] Plastic preforms are semi-finished products produced through injection molding. They are typically hollow cylinders closed at one end and threaded at the other, forming the basis for subsequent blow molding of plastic bottles. Their existence allows for phased plastic bottle production, with preforms first mass-produced and then rapidly blow-molded at different locations and times as needed, improving production flexibility and efficiency. They possess high strength and rigidity, good chemical resistance, and are commonly used for packaging detergents, cleaning agents, and pharmaceuticals. They also exhibit good heat resistance, flexural fatigue resistance, and chemical stability, making them suitable for manufacturing preforms for plastic bottles requiring high temperatures or special performance characteristics, such as certain food packaging bottles and pharmaceutical bottles. Therefore, a heating mechanism for PET plastic preform injection molding is necessary to facilitate the injection molding process.

[0003] Currently available heating mechanisms for plastic preform injection molding mainly consist of heating elements, stirring devices, and drive structures. These mechanisms play a crucial role in the injection molding process of these food packaging plastic preforms, ensuring the stability of the plastic raw material's performance through precise temperature control. This allows the produced preforms to effectively protect food from spoilage and leakage. However, heating the plastic raw material to the appropriate injection temperature takes a long time, reducing production efficiency and increasing energy consumption. To address these issues, existing technologies only increase the power density of the heating elements and select more efficient heating elements, without improving the uniform heating structure. This results in significant temperature differences in the plastic raw material at different locations within the heating chamber, causing some materials to fail to reach the appropriate injection temperature while others may overheat and decompose, affecting the quality of the preforms and leading to uneven wall thickness, surface defects, and failure to meet usage requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a heating mechanism for injection molding of PET plastic preforms. It aims to improve the existing technology, which does not improve the uniform heating structure. The temperature difference of plastic raw materials in different positions in the heating chamber is large, which causes some raw materials to not reach the appropriate injection temperature, while some raw materials may overheat and decompose, affecting the quality of the preform and causing problems such as uneven wall thickness and surface defects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heating mechanism for injection molding of PET plastic bottle preforms, comprising a mixing tank, a motor fixedly connected to the top rear side of the mixing tank, a drive shaft fixedly connected to the output end of the motor, a circular gear one fixedly connected to the top outer wall of the drive shaft, a chain meshing with the outer wall of the circular gear one, a circular gear two meshing with the other side of the chain, a rotating shaft fixedly connected to the middle of the circular gear two, a rotating plate fixedly connected to the bottom of the rotating shaft, a rotating upright fixedly connected to the opposite side of the rotating plate, multiple mixing strips fixedly connected to the bottom outer wall of the rotating upright, and a heating mechanism provided on the left side of the mixing tank, the heating mechanism being used to heat the plastic raw materials stored inside the mixing tank.

[0006] As a further description of the above technical solution:

[0007] The heating mechanism includes a heating box, a heater is fixedly connected to the rear side of the heating box, a water pump is fixedly connected to the top right side of the heating box, a water supply pipe is connected to the top of the water pump, a heating cavity is connected to the other side of the water supply pipe, and a drain pipe is connected to the bottom left side of the heating cavity.

[0008] As a further description of the above technical solution:

[0009] A fixing block is fixedly connected to the right side of the motor, and a mounting plate is fixedly connected to the middle of the rear side of the mixing tank.

[0010] As a further description of the above technical solution:

[0011] The bottom of each mixing tank is fixedly connected to multiple support legs, and the bottom of each support leg is fixedly connected to an anti-slip pad.

[0012] As a further description of the above technical solution:

[0013] A battery is fixedly connected to the bottom right side of the mounting plate, and a controller is fixedly connected to the rear left side of the mounting plate.

[0014] As a further description of the above technical solution:

[0015] A protective shell is fixedly connected to the top rear side of the mixing tank, and a cover plate is rotatably connected to the top front side of the mixing tank.

[0016] As a further description of the above technical solution:

[0017] A rotating handle is fixedly connected to the top front side of the cover plate, and an anti-slip sleeve is fixedly connected to the middle of the outer wall of the rotating handle.

[0018] As a further description of the above technical solution:

[0019] A valve is rotatably connected to the top of the drain pipe, and multiple reflective strips are fixedly connected around the heating box.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the starting motor outputs power to drive the drive shaft, circular gear one, drive chain, circular gear two, rotating shaft, rotating plate, rotating rod and mixing bar to rotate, thereby stirring and mixing the plastic raw materials inside the mixing tank, so that the raw materials are heated evenly in the heating chamber, avoiding local overheating or undercooling, which would affect the use.

[0022] 2. In this utility model, the heater is started to heat the water stored inside the heating box, and then the water pump is started to pump the heated water stored inside the heating box into the heating cavity opened inside the mixing tank through the water supply pipe to heat the plastic raw materials. The used water is then discharged into the heating box through the drain pipe, thereby realizing the heating of the plastic raw materials and the recycling of water, avoiding waste. Attached Figure Description

[0023] Figure 1 This is a perspective view of the mixing tank of a heating mechanism for injection molding PET plastic bottle preforms proposed in this utility model;

[0024] Figure 2 This is a structural diagram of a heating box for a heating mechanism used in injection molding of PET plastic preforms, as proposed in this utility model.

[0025] Figure 3 This is a structural diagram of the motor of a heating mechanism for injection molding PET plastic bottle preforms proposed in this utility model;

[0026] Figure 4 This is a schematic diagram illustrating the protective shell structure of a heating mechanism for injection molding PET plastic preforms proposed in this utility model.

[0027] Figure 5 This is a schematic diagram of the controller structure of a heating mechanism for injection molding PET plastic preforms proposed in this utility model.

[0028] Legend:

[0029] 1. Mixing tank; 2. Heating mechanism; 201. Heating box; 202. Heater; 203. Water pump; 204. Water supply pipe; 205. Heating cavity; 206. Drain pipe; 207. Valve; 208. Reflective strip; 3. Motor; 4. Drive shaft; 5. Circular gear one; 6. Chain; 7. Circular gear two; 8. Rotating shaft; 9. Rotating plate; 10. Rotating upright; 11. Mixing strip; 12. Fixing block; 13. Support leg; 14. Anti-slip pad; 15. Mounting plate; 16. Battery; 17. Controller; 18. Protective shell; 19. Cover plate; 20. Rotating handle; 21. Anti-slip sleeve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a heating mechanism for injection molding of PET plastic bottle preforms, including a mixing tank 1. A motor 3 is fixedly connected to the top rear side of the mixing tank 1. A drive shaft 4 is fixedly connected to the output end of the motor 3. A circular gear 5 is fixedly connected to the top outer wall of the drive shaft 4. A chain 6 is meshed with the outer wall of the circular gear 5. A circular gear 7 is meshed with the other side of the chain 6 to ensure power transmission. A rotating shaft 8 is fixedly connected to the middle of the circular gear 7. A rotating plate 9 is fixedly connected to the bottom of the rotating shaft 8. A rotating upright 10 is fixedly connected to the opposite side of the rotating plate 9. Multiple mixing strips 11 are fixedly connected to the bottom outer wall of the rotating upright 10 to effectively mix the materials in the mixing tank 1. A heating mechanism 2 is provided on the left side of the mixing tank 1. The heating mechanism 2 is used to heat the plastic raw materials stored inside the mixing tank 1.

[0032] Specifically, the rear top of the mixing tank 1 is designed to be fixedly connected to a motor 3. The output end of the motor 3 is fixedly connected to a drive shaft 4. A circular gear 5 is fixedly connected to the top of the outer wall of the drive shaft 4. The outer wall of the circular gear 5 is meshed with a chain 6. The other side of the chain 6 is meshed with a circular gear 7, ensuring the transmission of power. A rotating shaft 8 is fixedly connected to the middle of the circular gear 7. A rotating plate 9 is fixedly connected to the bottom of the rotating shaft 8. A rotating upright 10 is fixedly connected to the side of the rotating plate 9 away from the rotating plate 9. Multiple mixing strips 11 are fixedly connected to the bottom of the outer wall of the rotating upright 10. Under the drive of the rotating upright 10, these mixing strips 11 can effectively mix the materials in the mixing tank 1.

[0033] Please see the appendix Figure 2 - Appendix Figure 3 The heating mechanism 2 includes a heating box 201. A heater 202 is fixedly connected to the rear side of the heating box 201 to ensure that the temperature inside the heating box 201 can be effectively controlled and maintained. A water pump 203 is fixedly connected to the top right side of the heating box 201. The main function of the water pump 203 is to draw water from the heating box 201 and transport the water to the heating cavity 205 through the water supply pipe 204 connected to its top. The top of the water pump 203 is connected to the water supply pipe 204, and the other side of the water supply pipe 204 is connected to the heating cavity 205. The heating cavity 205 is used to further heat the water supplied by the water supply pipe 204 to achieve a higher temperature. A drain pipe 206 is connected to the bottom left side of the heating cavity 205. The function of the drain pipe 206 is to drain the water in the heating cavity 205 to ensure the continuity and efficiency of the heating process.

[0034] Specifically, the rear part of the heating chamber 201 is designed to be fixedly connected to a heater 202, which ensures that the temperature inside the heating chamber 201 can be effectively controlled and maintained. As an important component of the heating chamber 201, the heater 202 provides the necessary heat to meet the heating requirements. A water pump 203 is also fixedly connected to the top right side of the heating chamber 201. The main function of the water pump 203 is to draw water from the heating chamber 201 and transport the water to the heating cavity 205 through the water supply pipe 204 connected to its top. The other side of the water supply pipe 204 is connected to the heating cavity 205, which is used to further heat the water supplied by the water supply pipe 204 to achieve a higher temperature. The bottom left side of the heating cavity 205 is connected to a drain pipe 206, which drains the water in the heating cavity 205 to ensure the continuity and efficiency of the heating process.

[0035] Please see the appendix Figure 3 - Appendix Figure 4A fixing block 12 is fixedly connected to the right side of the motor 3 to ensure the stability of the motor 3 during operation. A mounting plate 15 is fixedly connected to the middle of the rear side of the mixing tank 1, so that the mixing tank 1 can remain stable during operation. Multiple support legs 13 are fixedly connected to the bottom of the mixing tank 1. These support legs 13 not only increase the stability of the mixing tank 1, but also prevent the mixing tank 1 from tilting during operation. Anti-slip pads 14 are fixedly connected to the bottom of the support legs 13, which can ensure that the mixing tank 1 can remain stable on various ground surfaces. A battery 16 is fixedly connected to the right rear side of the mounting plate 15, so that the mixing tank 1 can work independently of the external power supply, improving the flexibility of use. A controller 17 is fixedly connected to the left rear side of the mounting plate 15, so that the operator can easily control the working status of the mixing tank 1, improving the convenience of operation.

[0036] Specifically, the right side of the motor 3 is designed to be securely connected to a fixed block 12, ensuring the stability of the motor 3 during operation. The rear center of the mixing tank 1 is also designed to be fixedly connected to a mounting plate 15, so that the mixing tank 1 can remain stable during operation. Multiple support legs 13 are evenly fixedly connected to the bottom of the mixing tank 1. These support legs 13 not only increase the stability of the mixing tank 1, but also prevent the mixing tank 1 from tilting during operation. In order to further improve stability, anti-slip pads 14 are also fixedly connected to the bottom of the support legs 13, which can ensure that the mixing tank 1 remains stable on various ground surfaces. A battery 16 is fixedly connected to the rear right side of the mounting plate 15, so that the mixing tank 1 can work independently of an external power source, improving the flexibility of use. A controller 17 is fixedly connected to the rear left side of the mounting plate 15, so that the operator can easily control the working status of the mixing tank 1, improving the convenience of operation.

[0037] Please see the appendix Figure 3 - Appendix Figure 5 A protective shell 18 is fixedly connected to the rear top of the mixing tank 1, which can effectively protect the rear of the mixing tank 1 from external impacts and wear. A cover plate 19 is rotatably connected to the front top of the mixing tank 1, so that the cover plate 19 can be opened and closed flexibly. A rotating handle 20 is fixedly connected to the front top of the cover plate 19, which the user can easily open or close the cover plate 19 by rotating this handle. An anti-slip sleeve 21 is fixedly connected to the middle of the outer wall of the rotating handle 20, so that the user can firmly hold the handle even when the hands are wet or wearing gloves, and avoid slipping. A valve 207 is rotatably connected to the top of the drain pipe 206. By adjusting this valve 207, the user can control the flow rate and speed of drainage. Multiple reflective strips 208 are fixedly connected to all four sides of the heating box 201. These reflective strips 208 can reflect bright light under light, reminding people around to pay attention to the existence of the heating box 201, thereby avoiding accidents.

[0038] Specifically, a protective shell 18 is fixedly connected to the rear top of the mixing tank 1, effectively protecting the rear of the mixing tank 1 from external impacts and wear. A cover 19 is rotatably connected to the front top of the mixing tank 1, allowing the cover 19 to be opened and closed flexibly for user convenience. A rotating handle 20 is also fixedly connected to the front top of the cover 19, allowing the user to easily open or close the cover 19 by rotating this handle. To improve user comfort and safety, a protective shield is also fixedly connected to the middle of the outer wall of the rotating handle 20. The sliding sleeve 21 allows the user to firmly grip the handle even with wet hands or while wearing gloves, preventing slippage. In the drainage system of the mixing tank 1, the top of the drain pipe 206 is designed to be rotatably connected to a valve 207. By adjusting this valve 207, the user can control the flow rate and speed of drainage. To improve the visibility and safety of the heating box 201, multiple reflective strips 208 are fixedly connected around it. These reflective strips 208 can reflect bright light under illumination, alerting surrounding personnel to the presence of the heating box 201 and thus preventing accidents.

[0039] Working principle: When in use, the starting motor 3 outputs power to drive the drive shaft 4 to rotate. The rotation of the drive shaft 4 drives the first circular gear 5 to rotate, which in turn drives the chain 6 to rotate. The rotation of the chain 6 drives the second circular gear 7 to rotate, which in turn drives the rotating shaft 8 to rotate. The rotation of the rotating shaft 8 drives the rotating plate 9 to rotate, which in turn drives the rotating upright 10 to rotate. The rotation of the rotating upright 10 drives the mixing bar 11 to rotate, thereby stirring and mixing the plastic raw materials inside the mixing tank 1. This ensures that the raw materials are heated evenly in the heating chamber, avoiding local overheating or undercooling, which would affect the use.

[0040] In use, the heater 202 is started to heat the water stored inside the heating tank 201. Then, the water pump 203 is started to pump the heated water stored inside the heating tank 201 into the heating cavity 205 inside the mixing tank 1 through the water pipe 204 to heat the plastic raw materials. The used water is then discharged into the heating tank 201 through the drain pipe 206, thereby realizing the heating of the plastic raw materials and the recycling of water, avoiding waste.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heating mechanism for injection molding PET plastic bottle preforms, comprising a mixing tank (1), characterized in that: A motor (3) is fixedly connected to the top rear side of the mixing tank (1). A drive shaft (4) is fixedly connected to the output end of the motor (3). A circular gear (5) is fixedly connected to the top outer wall of the drive shaft (4). A chain (6) is meshed with the outer wall of the circular gear (5). A circular gear (7) is meshed with the other side of the chain (6). A rotating shaft (8) is fixedly connected to the middle of the circular gear (7). A rotating plate (9) is fixedly connected to the bottom of the rotating shaft (8). A rotating rod (10) is fixedly connected to the opposite side of the rotating plate (9). Multiple mixing strips (11) are fixedly connected to the bottom outer wall of the rotating rod (10). A heating mechanism (2) is provided on the left side of the mixing tank (1). The heating mechanism (2) is used to heat the plastic raw materials stored inside the mixing tank (1).

2. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 1, characterized in that: The heating mechanism (2) includes a heating box (201), a heater (202) is fixedly connected to the rear side of the heating box (201), a water pump (203) is fixedly connected to the top right side of the heating box (201), a water supply pipe (204) is connected to the top of the water pump (203), a heating cavity (205) is connected to the other side of the water supply pipe (204), and a drain pipe (206) is connected to the bottom left side of the heating cavity (205).

3. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 1, characterized in that: A fixing block (12) is fixedly connected to the right side of the motor (3), and a mounting plate (15) is fixedly connected to the middle of the rear side of the mixing tank (1).

4. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 1, characterized in that: The bottom of the mixing tank (1) is fixedly connected to multiple support legs (13), and the bottom of the support legs (13) is fixedly connected to anti-slip pads (14).

5. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 3, characterized in that: A battery (16) is fixedly connected to the bottom right side of the mounting plate (15), and a controller (17) is fixedly connected to the rear left side of the mounting plate (15).

6. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 1, characterized in that: A protective shell (18) is fixedly connected to the rear top of the mixing tank (1), and a cover plate (19) is rotatably connected to the front top of the mixing tank (1).

7. A heating mechanism for injection molding PET plastic bottle preforms according to claim 6, characterized in that: A rotating handle (20) is fixedly connected to the top front side of the cover plate (19), and an anti-slip sleeve (21) is fixedly connected to the middle of the outer wall of the rotating handle (20).

8. The heating mechanism for injection molding of PET plastic bottle preforms according to claim 2, characterized in that: A valve (207) is rotatably connected to the top of the drain pipe (206), and multiple reflective strips (208) are fixedly connected around the heating box (201).

Images