Rapid cooling mold for extrusion blow molding of high-density polyethylene

Abstract

The utility model relates to the field of die design and manufacture, and discloses a quick cooling die for extrusion blow molding of high density polyethylene, which comprises a water tank, hydraulic cylinders are arranged at the center of the upper end face of the water tank close to two sides, and the output ends of the two hydraulic cylinders are fixedly connected with fixing plates. Mold blocks are arranged on the upper portions of the centers of one side faces of the two fixing plates, air holes are formed in the attached positions of the centers of the upper end faces of the two mold blocks, a filter box is arranged on the front portion of the center of the upper end face of the water tank, a first filter screen is arranged between the two inner side walls of the filter box, and sliding blocks are arranged on the centers of the two inner side walls of the first filter screen. According to the utility model, used water enters the filter tank through the water outlet, is filtered by the first filter screen and then is reused, so that the water cost is reduced, impurities are removed through the filter screen, the corrosion and abrasion to equipment are reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mold design and manufacturing, and in particular to a rapid cooling mold for high-density polyethylene extrusion blow molding. Background Technology

[0002] High-density polyethylene extrusion blow molding is a widely used process for manufacturing hollow plastic products such as bottles, barrels, and cans. This process has the advantages of high production efficiency, low cost, and excellent product performance. However, in the traditional extrusion blow molding process, the cooling process is often the key factor restricting production efficiency and product quality. In order to solve this problem, rapid cooling mold technology has emerged.

[0003] Currently, water is widely used as an important cooling medium in most high-density polyethylene extrusion blow molding rapid cooling dies. However, water cooling systems often suffer from serious water waste and are prone to equipment corrosion and accelerated wear. Therefore, those skilled in the art provide a rapid cooling die for high-density polyethylene extrusion blow molding to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid cooling mold for high-density polyethylene extrusion blow molding. Used water is allowed to enter a filter box through an outlet, filtered through a first filter screen, and then reused, reducing water costs. Furthermore, the filter screen removes impurities, reducing corrosion and wear on the equipment, thereby extending its service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid cooling mold for high-density polyethylene extrusion blow molding, comprising a water tank, wherein hydraulic cylinders are provided on both sides of the upper end face of the water tank, and fixed plates are fixedly connected to the output ends of the two hydraulic cylinders; a mold block is provided on the upper side of one side of the two fixed plates, and an air hole is provided at the center of the upper end face of the two mold blocks; a filter box is provided at the front of the upper end face of the water tank, wherein a first filter screen is provided between the two inner side walls of the filter box, and a slider is provided at the center of the two inner side walls of the first filter screen; the front end of the first filter screen penetrates through the front inner wall of the filter box and extends to the front end face of the filter box, and a handle is provided at the end;

[0006] The filter box has an outlet on its lower inner wall, which extends through the lower inner wall to the inside of the water tank. Both mold blocks have rectangular grooves inside. The water tank has a refrigeration structure inside. Water pumps are located on both sides of the center of the upper inner wall of the water tank. The output ends of both water pumps extend through the upper inner wall of the water tank to the upper end of the water tank, and are fixedly connected to the ends with second hoses. The output ends of both second hoses are connected to water pipes. Both fixing plates have straight grooves inside. The two water pipes are respectively fitted inside the two straight grooves, and their output ends extend through the upper side wall of each of the two mold blocks to the inner wall of one of the two rectangular grooves. The lower end of the fixing plates at the lower end of the two rectangular grooves is fixedly connected with first hoses. The input ends of the two first hoses extend through the lower end face of the rectangular grooves to the lower inner wall of the rectangular grooves, and their output ends extend through the upper end face of the filter box to the upper inner wall.

[0007] The above technical solution allows used water to enter the filter box through the outlet, be filtered by the first filter screen, and then reused, reducing water costs. The filter screen also removes impurities, reducing corrosion and wear on the equipment, thereby extending its service life.

[0008] Furthermore, the refrigeration structure includes a stirring blade, a rectangular box, and a rotary motor. The stirring blade is located at the center inside the water tank, and its upper end face is rotatably connected to the inner wall of the water tank. The rectangular box is located at the lower end of the water tank, and the rotary motor is located on the lower inner wall of the rectangular box. The lower end of the stirring blade passes through the lower inner wall of the water tank and the upper end face of the rectangular box to the inside of the rectangular box, and its end is fixedly connected to the output end of the rotary motor.

[0009] The above technical solution enhances heat exchange between liquid surfaces by controlling the rotation of the stirring blades driven by the rotary motor, thereby improving heat transfer efficiency and shortening cooling time.

[0010] Furthermore, heat-conducting plates are provided on the lower part of the two inner sidewalls of the water tank, and a semiconductor cooling plate is provided at the center of one side of each of the two heat-conducting plates. The two semiconductor cooling plates pass through the two sidewalls of the water tank and extend to the two inner sidewalls of the water tank. Heat dissipation fins are provided at the hot end of each of the two semiconductor cooling plates. A frame is fitted on the outside of each of the two heat dissipation fins. A fan is provided inside the rear frame of each of the two heat dissipation fins. A second filter screen is provided at both the front and rear ends of each of the two frames.

[0011] The above technical solution uses the cold end of the semiconductor cooling chip to cool the heat-conducting sheet, thereby cooling the water in the water tank and facilitating the rapid cooling of the mold block in the subsequent process.

[0012] Furthermore, eddy current generators are fixedly connected to the inner sidewalls of both rectangular slots on both sides.

[0013] The above technical solution uses a vortex generator to create vortices in the rectangular groove, increasing the contact area between the water and the mold block, thereby rapidly cooling the mold block and improving production efficiency.

[0014] Furthermore, a limiting block is provided on one side of the upper end face of the filter box, and rectangular blocks are provided on both sides of the center of the upper end face of the water tank, near the front and near the rear of the center;

[0015] Through the above technical solution, the limiting block ensures that the first filter screen will not slip out during the use of the device, and the rectangular block limits the hydraulic cylinder, ensuring that the fixed plate and the mold block can fit together when controlling the hydraulic cylinder, thereby increasing the safety of the equipment and improving its efficiency.

[0016] Furthermore, a water inlet is provided at the upper center of one side wall of the water tank;

[0017] The above technical solution allows water to be poured into the water tank through the inlet, making full use of the space at the bottom of the water tank and increasing the effective water storage capacity.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the used water enters the filter box through the outlet, is filtered through the first filter screen, and is then reused, which reduces water costs. The filter screen also removes impurities, reducing corrosion and wear on the equipment, thereby extending the service life of the equipment.

[0020] 2. In this utility model, the heat exchange between the liquid surfaces is enhanced by controlling the rotating motor to drive the stirring blade to rotate, thereby improving the heat transfer efficiency and shortening the cooling time. The heat-conducting plate is cooled by the cold end of the semiconductor refrigeration chip, thereby cooling the water in the water tank, which facilitates the rapid cooling of the mold block in the subsequent process.

[0021] 3. In this utility model, a vortex generator is used to generate vortices in the rectangular groove, which increases the contact area between the water and the mold block, thereby rapidly cooling the mold block and improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a perspective view of a rapid cooling mold for high-density polyethylene extrusion blow molding proposed in this utility model.

[0023] Figure 2 This is a side sectional view of a rapid cooling mold for high-density polyethylene extrusion blow molding proposed in this utility model.

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2Enlarged diagram of point B in the middle.

[0026] Legend:

[0027] 1. Water tank; 2. Handle; 3. Limiting block; 4. Air vent; 5. Fixing plate; 6. Hydraulic cylinder; 7. Water inlet; 8. Mold block; 9. Refrigeration structure; 10. First hose; 11. First filter screen; 12. Water pipe; 13. Second hose; 14. Water pump; 15. Vortex generator; 16. Rectangular groove; 17. Straight groove; 18. Filter box; 19. Slider; 20. Water outlet; 21. Rectangular block; 901. Stirring blade; 902. Rectangular box; 903. Rotary motor; 904. Semiconductor cooling chip; 905. Heat-conducting plate; 906. Fan; 907. Second filter screen; 908. Heat dissipation fins; 909. Frame. Detailed Implementation

[0028] 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.

[0029] Reference Figure 1-4 An embodiment of this utility model provides a rapid cooling mold for high-density polyethylene extrusion blow molding, comprising a water tank 1, with hydraulic cylinders 6 located on both sides of the center of the upper end face of the water tank 1, and fixed plates 5 fixedly connected to the output ends of the two hydraulic cylinders 6, with mold blocks 8 located on the upper side of one side of the two fixed plates 5, and air holes 4 located at the center of the upper end face of the two mold blocks 8, with a filter box 18 located at the front of the center of the upper end face of the water tank 1, with a first filter screen 11 located between the two inner side walls of the filter box 18, and sliders 19 located at the center of the two inner side walls of the first filter screen 11, the front end of the first filter screen 11 penetrating through the front inner wall of the filter box 18 to the front end face of the filter box 18, and a handle 2 located at the end.

[0030] The filter box 18 has an outlet 20 on its lower inner wall, which extends through the filter box 18 to the inside of the water tank 1. Both mold blocks 8 have rectangular grooves 16 inside. The water tank 1 has a refrigeration structure 9 inside. Water pumps 14 are located on both sides of the center of the upper inner wall of the water tank 1. The output ends of both water pumps 14 extend through the upper inner wall of the water tank 1 to the upper end of the water tank 1, and are fixedly connected to the ends of a second flexible hose 13. The output ends of both second flexible hoses 13 are connected to water pipes 12. Both fixing plates 5 have straight grooves 17 inside, and the two water pipes 12 are respectively fitted inside the two straight grooves 17, with their output ends extending through... Two mold blocks 8 have their upper side walls connected to the inner walls of two rectangular grooves 16. First flexible hoses 10 are fixedly connected to the lower end faces of the fixing plates 5 at the lower ends of the two rectangular grooves 16. The input ends of the two first flexible hoses 10 pass through the lower end faces of the rectangular grooves 16 and connect to the lower inner wall of the rectangular grooves 16, while the output ends pass through the upper end faces of the filter box 18 and connect to the upper inner wall. Used water enters the filter box 18 through the outlet 20, is filtered by the first filter screen 11, and is then reused. This reduces water costs and removes impurities through the filter screen, reducing corrosion and wear on the equipment, thereby extending its service life.

[0031] like Figure 2 As shown, the refrigeration structure 9 includes a stirring blade 901, a rectangular box 902, and a rotary motor 903. The stirring blade 901 is located at the center inside the water tank 1, and its upper end is rotatably connected to the inner wall of the water tank 1. The rectangular box 902 is located at the lower end of the water tank 1, and the rotary motor 903 is located on the lower inner wall of the rectangular box 902. The lower end of the stirring blade 901 passes through the lower inner wall of the water tank 1 and connects to the upper end of the rectangular box 902 to the interior of the rectangular box 902. Its end is fixedly connected to the output end of the rotary motor 903. By controlling the rotary motor 903 to drive the stirring blade 901 to rotate, the heat exchange between the liquid surfaces is enhanced, the heat transfer efficiency is improved, and the cooling time is shortened.

[0032] like Figure 4 As shown, heat-conducting plates 905 are provided on the lower part of the two inner side walls of the water tank 1. A semiconductor cooling chip 904 is provided at the center of one side of each heat-conducting plate 905. The two semiconductor cooling chips 904 pass through the two side walls of the water tank 1 and extend to the two inner side walls of the water tank 1. The hot end of each semiconductor cooling chip 904 is provided with heat dissipation fins 908. A frame 909 is fitted on the outside of each heat dissipation fin 908. A fan 906 is provided inside the frame 909 at the rear end of each heat dissipation fin 908. A second filter screen 907 is provided at both the front and rear ends of each frame 909. The heat-conducting plates 905 are cooled by the cold end of the semiconductor cooling chip 904, thereby cooling the water in the water tank 1, which facilitates the rapid cooling of the mold block 8 in the subsequent process.

[0033] like Figure 2As shown, eddy current generators 15 are fixedly connected to the inner sidewalls of the two rectangular grooves 16 on both sides. The eddy current generators 15 generate eddies in the rectangular grooves 16, increasing the contact area between the water and the mold block 8, thereby rapidly cooling the mold block 8 and improving production efficiency.

[0034] like Figure 1 As shown, a limiting block 3 is provided on one side of the upper end face of the filter box 18, and rectangular blocks 21 are provided on both sides of the center of the upper end face of the water tank 1, near the front and near the rear of the center. The limiting block 3 ensures that the first filter screen 11 will not slip out during the use of the device. The rectangular blocks 21 limit the hydraulic cylinder 6, ensuring that the fixing plate 5 and the mold block 8 can fit together when the hydraulic cylinder 6 is controlled, thereby increasing the safety of the equipment and improving the efficiency of use.

[0035] A water inlet 7 is provided at the upper center of one side wall of the water tank 1. Water is poured into the water tank 1 through the water inlet 7, so that the bottom space of the water tank 1 is fully utilized and the effective water storage capacity is increased.

[0036] Working principle: During use, the control semiconductor cooling chip 904 and rotary motor 903 are started to cool the water inside the water tank 1. Then, the control hydraulic cylinder 6 pushes the fixing plate 5 to tightly fit the two mold blocks 8 together. High-density polyethylene is put into the mold blocks 8, and gas is blown into the air hole 4 to form the high-density polyethylene. After that, the control water pump 14 transports the water on the inner wall of the water tank 1 to the rectangular tank 16 through the second hose 13 and water pipe 12. At the same time, the eddy current generator 15 is started to create eddies to increase the contact area between the water and the mold blocks 8, so that the mold blocks 8 are cooled down quickly. After that, the water inside the rectangular tank 16 enters the filter box 18 through the first hose 10, is filtered by the first filter screen 11, and then re-enters the water tank 1 for recycling.

[0037] 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 rapid cooling mold for high-density polyethylene extrusion blow molding, comprising a water tank (1), characterized in that: Hydraulic cylinders (6) are provided on both sides of the center of the upper end face of the water tank (1). The output ends of the two hydraulic cylinders (6) are fixedly connected to the fixing plates (5). The center of one side of the two fixing plates (5) is provided with mold blocks (8). The center of the upper end face of the two mold blocks (8) is provided with air holes (4). The center of the upper end face of the water tank (1) is provided with a filter box (18). The filter box (18) is provided between the two inner side walls. The center of the two inner side walls of the first filter box (11) is provided with sliders (19). The front end of the first filter box (11) passes through the front inner wall of the filter box (18) and extends to the front end face of the filter box (18). The end is provided with a handle (2). The filter box (18) has an outlet (20) on its lower inner wall. The outlet (20) passes through the lower inner wall of the filter box (18) and leads to the interior of the water tank (1). Both mold blocks (8) have rectangular grooves (16) inside. The water tank (1) has a refrigeration structure (9) inside. Both sides of the upper inner wall of the water tank (1) have water pumps (14) at their center. The output ends of both water pumps (14) pass through the upper inner wall of the water tank (1) and lead to the upper end of the water tank (1). The ends of both water pumps (14) are fixedly connected to a second hose (13). The output ends of both second hoses (13) are connected to water pipes. (12) Both of the two fixing plates (5) are provided with straight grooves (17). The two water pipes (12) are respectively fitted inside the two straight grooves (17), and the output ends pass through the upper part of one side wall of the two mold blocks (8) and are connected to the inner wall of the two rectangular grooves (16). The lower end of the fixing plate (5) of the two rectangular grooves (16) is fixedly connected with a first hose (10). The input end of the two first hoses (10) passes through the lower end of the rectangular groove (16) and is connected to the lower inner wall of the rectangular groove (16), and the output end passes through the upper end of the filter box (18) and is connected to the upper inner wall.

2. A rapid cooling mold for high density polyethylene extrusion blow molding according to claim 1, characterized in that: The refrigeration structure (9) includes a stirring blade (901), a rectangular box (902), and a rotary motor (903). The stirring blade (901) is located at the center inside the water tank (1), and its upper end is rotatably connected to the inner wall of the water tank (1). The rectangular box (902) is located at the lower end of the water tank (1), and the rotary motor (903) is located on the lower inner wall of the rectangular box (902). The lower end of the stirring blade (901) passes through the lower inner wall of the water tank (1) and the upper end of the rectangular box (902) to the inside of the rectangular box (902), and its end is fixedly connected to the output end of the rotary motor (903).

3. A rapid cooling mold for high density polyethylene extrusion blow molding according to claim 1, characterized in that: The water tank (1) has heat-conducting plates (905) at the lower part of the two inner side walls. Each heat-conducting plate (905) has a semiconductor cooling plate (904) at the center of one side. The two semiconductor cooling plates (904) pass through the two side walls of the water tank (1) and extend to the two inner side walls of the water tank (1). Each semiconductor cooling plate (904) has a heat dissipation fin (908) at its hot end. Each heat dissipation fin (908) has a frame (909) fitted on its outer side. Each heat dissipation fin (908) has a fan (906) inside the frame (909) at the rear end of the frame (909). Each frame (909) has a second filter (907) at both the front and rear ends.

4. A rapid cooling mold for high density polyethylene extrusion blow molding according to claim 1, characterized in that: Eddy current generators (15) are fixedly connected to the inner sidewalls of the two rectangular grooves (16) on both sides.

5. A rapid cooling mold for high-density polyethylene extrusion blow molding according to claim 1, characterized in that: The filter box (18) has a limiting block (3) on one side of its upper end face, and the water tank (1) has rectangular blocks (21) on both sides of the center of its upper end face, near the front and near the rear of the center.

6. A rapid cooling mold for high density polyethylene extrusion blow molding according to claim 1, characterized in that: The water tank (1) has an inlet (7) located at the upper center of one side wall.

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