Die with improved hot runner structure

Abstract

The utility model discloses a mold with an improved hot runner structure, which comprises an upper fixing plate and a female mold plate, the female mold plate is mounted at the bottom end of the upper fixing plate, a male mold plate is arranged at the bottom end of the female mold plate, an ejector plate is arranged at the bottom end of the male mold plate, and a lower supporting plate is mounted at the bottom end of the ejector plate. A lower positioning plate is mounted at the bottom end of the lower supporting plate, a lower fixing plate is mounted at the bottom end of the lower positioning plate, mold feet are symmetrically mounted at the top end of the lower supporting plate on one side of the ejector plate, the top ends of the mold feet are connected with the male mold plate, and a female mold core is mounted in the center of the interior of the female mold plate. According to the mold with the improved hot runner structure, the temperature of liquid in the runner can be conveniently controlled, the stress of a formed product is prevented from being influenced by too large temperature difference of the liquid entering the mold initially, the temperature of the liquid in the runner can be conveniently adjusted and controlled in time, the forming quality of the product is improved, and the convenience of taking the formed product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold with an improved hot runner structure. Background Technique

[0002] A hot runner mold is a mold that uses a heating device to keep the melt in the runner from solidifying all the time. Because it has a shorter molding cycle than traditional molds and saves more raw materials, hot runner molds are widely used in all industrialized countries and regions in the world today. The hot runner system is divided into an adiabatic runner and a micro semi-hot runner system. The design of the adiabatic runner is complex, but it has good effects and very low maintenance costs. The micro semi-hot runner system simplifies the structure, is stable and easy to use, and has a low failure rate. Because of its simple structure, the maintenance cost is low, which provides greater guarantee for the stable production.

[0003] A hot runner system generally consists of several parts such as a hot nozzle, a manifold plate, a temperature control box and accessories. There are generally two types of hot nozzles: open hot nozzles and needle valve hot nozzles. Since the form of the hot nozzle directly determines the selection of the hot runner system and the manufacturing of the mold, the hot runner system is often correspondingly divided into an open hot runner system and a needle valve hot runner system. When the existing such molds are in use, it is generally not convenient to control the temperature of the liquid in the runner. The too large temperature difference of the initially entering liquid is likely to affect the stress of the molded product, and it is not convenient to timely adjust and control the temperature of the liquid inside the runner, which affects the quality of the product molding and the convenience of taking the molded product. Content of the Utility Model

[0004] The purpose of the utility model is to provide a mold with an improved hot runner structure to solve the problems proposed in the above background technique that the mold is not convenient to control the temperature of the liquid in the runner, the too large temperature difference of the initially entering liquid is likely to affect the stress of the molded product, it is not convenient to timely adjust and control the temperature of the liquid inside the runner, which affects the quality of the product molding and the convenience of taking the molded product.

[0005] To achieve the above object, the utility model provides the following technical solutions: A mold with an improved hot runner structure, including an upper fixing plate and a female template. The bottom end of the upper fixing plate is provided with a female template. The bottom end of the female template is provided with a male template. The bottom end of the male template is provided with an ejector plate. The bottom end of the ejector plate is provided with a lower support plate. The bottom end of the lower support plate is provided with a lower positioning plate. The bottom end of the lower positioning plate is provided with a lower fixing plate. On the top of the lower support plate on one side of the ejector plate, mold feet are symmetrically installed, and the top ends of the mold feet are connected to the male template. At the central position inside the female template, a female mold core is installed. On the top of the male template below the female mold core, a male mold core is installed, and a product body is arranged between the male mold core and the female mold core. At the central position of the bottom end of the lower fixing plate, a nozzle is installed. The top end of the nozzle is provided with a mixing chamber. On the outer wall of the nozzle above the mixing chamber, a second temperature sensor is installed, and the second temperature sensor extends into the interior of the nozzle.

[0006] Preferably, three flow channel pipes are installed at equal intervals at the top end of the mixing chamber, and the flow channel pipes extend into the interior of the male mold core.

[0007] Preferably, first temperature sensors are installed on the outer walls of the flow channel pipes below the mixing chamber, and the first temperature sensors all extend into the interior of the flow channel pipes.

[0008] Preferably, an upper heating wire is installed at the bottom end of the mixing chamber, and a lower heating wire is installed at the top end of the mixing chamber.

[0009] Preferably, an upper cooling pipe is arranged inside the female template, a lower cooling pipe is arranged inside the male template, and hydraulic cylinders are symmetrically installed on the outer wall of the ejector plate.

[0010] Preferably, transmission blocks are installed at the output ends of the hydraulic cylinders, and the transmission blocks are all connected to the lower support plate.

[0011] Preferably, multiple ejector pins are installed at equal intervals at the top end of the ejector plate, and the ejector pins all extend into the interior of the male mold core.

[0012] Preferably, lifting rings are installed on the outer walls of the upper fixing plate and the lower fixing plate. A positioning block is arranged on the outer wall of the female template. Inside the positioning block, positioning bolts are symmetrically installed, and the two groups of positioning bolts are respectively connected to the female template and the male template.

[0013] Compared with the prior art, the beneficial effects of the utility model are: This mold not only realizes the convenient control of the temperature of the liquid in the hot runner structure, prevents the excessive temperature difference of the initially entering liquid from affecting the stress of the formed product, facilitates the timely adjustment and control of the temperature of the liquid inside the flow channel, but also improves the quality of product forming and the convenience of taking the formed product. Description of the Drawings

[0014] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional structure schematic diagram of the upper fixing plate of the present utility model;

[0016] Figure 3 is a side view structure schematic diagram of the present utility model;

[0017] Figure 4 is a three-dimensional packaging structure schematic diagram of the present utility model;

[0018] Figure 5 is a three-dimensional exploded structure schematic diagram of the male template of the present utility model;

[0019] Figure 6 is a front view sectional structure schematic diagram of the runner tube of the present utility model;

[0020] Figure 7 is a three-dimensional structure schematic diagram of the runner tube of the present utility model;

[0021] Figure 8 is a three-dimensional structure schematic diagram of the product body of the present utility model;

[0022] Figure 9 is a three-dimensional structure schematic diagram of the nozzle of the present utility model;

[0023] Figure 10 is a three-dimensional structure schematic diagram of the mixing chamber of the present utility model.

[0024] In the figure: 1. upper fixing plate; 2. female template; 3. female mold core; 4. male mold core; 5. product body; 6. male template; 7. hydraulic cylinder; 8. ejector plate; 9. transmission block; 10. lower support plate; 11. lower positioning plate; 12. lower fixing plate; 13. ejector pin; 14. lower cooling pipe; 15. upper cooling pipe; 16. runner tube; 17. first temperature sensor; 18. mixing chamber; 19. lower heating wire; 20. nozzle; 21. second temperature sensor; 22. upper heating wire; 23. lifting ring; 24. mold base; 25. positioning block; 26. positioning bolt. Specific Embodiments

[0025] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present utility model as follows.

[0026] Please refer to Figures 1-10, An embodiment provided by the present utility model: A mold with an improved hot runner structure, including an upper fixing plate 1 and a female template 2. The bottom end of the upper fixing plate 1 is installed with the female template 2. The bottom end of the female template 2 is provided with a male template 6. The bottom end of the male template 6 is provided with an ejector plate 8. The bottom end of the ejector plate 8 is installed with a lower support plate 10. The bottom end of the lower support plate 10 is installed with a lower positioning plate 11. The bottom end of the lower positioning plate 11 is installed with a lower fixing plate 12. On the top of the lower support plate 10 on one side of the ejector plate 8, mold feet 24 are symmetrically installed, and the top end of the mold feet 24 is connected to the male template 6. At the central position inside the female template 2, a female mold core 3 is installed. On the top end of the male template 6 below the female mold core 3, a male mold core 4 is installed, and a product body 5 is arranged between the male mold core 4 and the female mold core 3. At the central position of the bottom end of the lower fixing plate 12, a nozzle 20 is installed. The top end of the nozzle 20 is installed with a mixing chamber 18. On the outer wall of the nozzle 20 above the mixing chamber 18, a second temperature sensor 21 is installed, and the second temperature sensor 21 extends into the interior of the nozzle 20;

[0027] Three groups of runner tubes 16 are installed at equal intervals at the top end of the mixing chamber 18, and the runner tubes 16 extend into the interior of the male mold core 4.

[0028] On the outer walls of the runner tubes 16 below the mixing chamber 18, first temperature sensors 17 are installed, and the first temperature sensors 17 all extend into the interior of the runner tubes 16;

[0029] An upper heating wire 22 is installed at the bottom end of the mixing chamber 18, a lower heating wire 19 is installed at the top end of the mixing chamber 18, upper cooling tubes 15 are arranged inside the female template 2, and lower cooling tubes 14 are arranged inside the male template 6;

[0030] Through the molten liquid entering the interior of the nozzle 20 and flowing from the nozzle 20 into the interior of the mixing chamber 18, the second temperature sensor 21 monitors the temperature of the liquid inside the nozzle 20. When it is monitored that the temperature is lower than the rated temperature, the external controller turns on the upper heating wire 22 and the lower heating wire 19 to perform constant temperature heating on the liquid inside the mixing chamber 18. The first temperature sensor 17 performs temperature monitoring again. The liquid flows through the runner tubes 16 to the surfaces of the female mold core 3 and the male mold core 4, and forms the product body 5 under the cooling action of the upper cooling tubes 15 and the lower cooling tubes 14, so as to prevent excessive temperature difference inside the liquid and uneven stress during molding, prevent affecting the injection molding quality, control the temperature of the liquid inside the runner, realize the convenient control of the temperature of the liquid in the runner of the mold with the improved hot runner structure, prevent the excessive temperature difference of the initially entering liquid from affecting the stress of the molded product, facilitate the timely adjustment and control of the temperature of the liquid inside the runner, and improve the quality of product molding;

[0031] Hydraulic cylinders 7 are symmetrically installed on the outer wall of the ejector plate 8. The output ends of the hydraulic cylinders 7 are all installed with transmission blocks 9, and the transmission blocks 9 are all connected to the lower support plate 10;

[0032] A plurality of ejector pins 13 are installed at equal intervals at the top end of the ejector plate 8, and the ejector pins 13 all extend into the internal part of the male mold core 4;

[0033] Lifting rings 23 are installed on the outer walls of the upper fixing plate 1 and the lower fixing plate 12, a positioning block 25 is arranged on the outer wall of the female template 2, positioning bolts 26 are symmetrically installed inside the positioning block 25, and the two groups of positioning bolts 26 are respectively connected to the female template 2 and the male template 6;

[0034] When mold opening is required, the female template 2 is separated from the male template 6, the hydraulic cylinder 7 is opened, the hydraulic cylinder 7 drives the transmission block 9 to move, under the support of the lower support plate 10 for the transmission block 9, the hydraulic cylinder 7 drives the ejector plate 8 to move, the ejector plate 8 drives a plurality of ejector pins 13 to move, and the ejector pins 13 eject the product body 5 to facilitate the taking out of the product. The lifting rings 23 facilitate the hoisting of the mold. The positioning block 25 is connected to the female template 2 and the male template 6 through the positioning bolts 26 to improve the stability after the female template 2 and the male template 6 are closed, and to prevent the female template 2 and the male template 6 from separating during the handling of the mold, realizing the convenient ejection and molding of the product by the mold with an improved hot runner structure and improving the convenience of taking out the molded product.

[0035] When the embodiment of the present application is in use: an external power supply is connected. First, the molten liquid enters the inside of the nozzle 20, and flows from the nozzle 20 into the inside of the mixing chamber 18. The second temperature sensor 21 monitors the temperature of the liquid inside the nozzle 20. When it is monitored that the temperature is lower than the rated temperature, the external controller turns on the upper heating wire 22 and the lower heating wire 19 to perform constant temperature heating on the liquid inside the mixing chamber 18. The first temperature sensor 17 performs re - temperature monitoring. The liquid flows through the runner tube 16 onto the surfaces of the female mold core 3 and the male mold core 4, and forms the product body 5 under the cooling action of the upper cooling tube 15 and the lower cooling tube 14, to prevent the stress from being uneven during molding due to too large a temperature difference inside the liquid, to prevent affecting the injection molding quality, and to control the temperature of the liquid inside the runner. Then, when mold opening is required, the female template 2 is separated from the male template 6, the hydraulic cylinder 7 is opened, the hydraulic cylinder 7 drives the transmission block 9 to move, under the support of the lower support plate 10 for the transmission block 9, the hydraulic cylinder 7 drives the ejector plate 8 to move, the ejector plate 8 drives a plurality of ejector pins 13 to move, and the ejector pins 13 eject the product body 5 to facilitate the taking out of the product. The lifting rings 23 facilitate the hoisting of the mold. The positioning block 25 is connected to the female template 2 and the male template 6 through the positioning bolts 26 to improve the stability after the female template 2 and the male template 6 are closed, and to prevent the female template 2 and the male template 6 from separating during the handling of the mold, thus completing the use of the mold.

[0036] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the technical content disclosed above. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An improved mold with a hot runner structure, characterized in that: It includes an upper fixing plate (1) and a female template (2). The bottom end of the upper fixing plate (1) is equipped with the female template (2). The bottom end of the female template (2) is provided with a male template (6). The bottom end of the male template (6) is provided with an ejector plate (8). The bottom end of the ejector plate (8) is equipped with a lower support plate (10). The bottom end of the lower support plate (10) is equipped with a lower positioning plate (11). The bottom end of the lower positioning plate (11) is equipped with a lower fixing plate (12). On the top of the lower support plate (10) on one side of the ejector plate (8), mold feet (24) are symmetrically installed, and the top ends of the mold feet (24) are connected to the male template (6). At the central position inside the female template (2), a female mold core (3) is installed. On the top of the male template (6) below the female mold core (3), a male mold core (4) is installed, and a product body (5) is arranged between the male mold core (4) and the female mold core (3). At the central position of the bottom end of the lower fixing plate (12), a nozzle (20) is installed. The top end of the nozzle (20) is equipped with a mixing chamber (18). On the outer wall of the nozzle (20) above the mixing chamber (18), a second temperature sensor (21) is installed, and the second temperature sensor (21) extends into the interior of the nozzle (20).

2. The mold with an improved hot runner structure according to claim 1, characterized in that: At the top end of the mixing chamber (18), three sets of runner pipes (16) are installed at equal intervals, and the runner pipes (16) extend into the interior of the male mold core (4).

3. The mold with improved hot runner structure according to claim 1, characterized in that: On the outer walls of the runner pipes (16) below the mixing chamber (18), first temperature sensors (17) are installed, and the first temperature sensors (17) all extend into the interior of the runner pipes (16).

4. The mold with an improved hot runner structure according to claim 1, characterized in that: At the bottom end of the mixing chamber (18), an upper heating wire (22) is installed, and at the top end of the mixing chamber (18), a lower heating wire (19) is installed.

5. The mold with an improved hot runner structure according to claim 1, characterized in that: Inside the female template (2), an upper cooling pipe (15) is arranged. Inside the male template (6), a lower cooling pipe (14) is arranged. On the outer wall of the ejector plate (8), hydraulic cylinders (7) are symmetrically installed.

6. The mold with improved hot runner structure according to claim 5, characterized in that: The output ends of the hydraulic cylinders (7) are all equipped with transmission blocks (9), and the transmission blocks (9) are all connected to the lower support plate (10).

7. The mold with an improved hot runner structure according to claim 1, characterized in that: On the top end of the ejector plate (8), multiple sets of ejector pins (13) are installed at equal intervals, and the ejector pins (13) all extend into the interior of the male mold core (4).

8. The mold with improved hot runner structure according to claim 1, characterized in that: On the outer walls of the upper fixing plate (1) and the lower fixing plate (12), lifting rings (23) are installed. On the outer wall of the female template (2), a positioning block (25) is arranged. Inside the positioning block (25), positioning bolts (26) are symmetrically installed, and the two groups of positioning bolts (26) are respectively connected to the female template (2) and the male template (6).

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